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 static JImage_ResourcePath_t JImageResourcePath = NULL; 108 109 // Globals 110 111 PerfCounter* ClassLoader::_perf_accumulated_time = NULL; 112 PerfCounter* ClassLoader::_perf_classes_inited = NULL; 113 PerfCounter* ClassLoader::_perf_class_init_time = NULL; 114 PerfCounter* ClassLoader::_perf_class_init_selftime = NULL; 115 PerfCounter* ClassLoader::_perf_classes_verified = NULL; 116 PerfCounter* ClassLoader::_perf_class_verify_time = NULL; 117 PerfCounter* ClassLoader::_perf_class_verify_selftime = NULL; 118 PerfCounter* ClassLoader::_perf_classes_linked = NULL; 119 PerfCounter* ClassLoader::_perf_class_link_time = NULL; 120 PerfCounter* ClassLoader::_perf_class_link_selftime = NULL; 121 PerfCounter* ClassLoader::_perf_class_parse_time = NULL; 122 PerfCounter* ClassLoader::_perf_class_parse_selftime = NULL; 123 PerfCounter* ClassLoader::_perf_sys_class_lookup_time = NULL; 124 PerfCounter* ClassLoader::_perf_shared_classload_time = NULL; 125 PerfCounter* ClassLoader::_perf_sys_classload_time = NULL; 126 PerfCounter* ClassLoader::_perf_app_classload_time = NULL; 127 PerfCounter* ClassLoader::_perf_app_classload_selftime = NULL; 128 PerfCounter* ClassLoader::_perf_app_classload_count = NULL; 129 PerfCounter* ClassLoader::_perf_define_appclasses = NULL; 130 PerfCounter* ClassLoader::_perf_define_appclass_time = NULL; 131 PerfCounter* ClassLoader::_perf_define_appclass_selftime = NULL; 132 PerfCounter* ClassLoader::_perf_app_classfile_bytes_read = NULL; 133 PerfCounter* ClassLoader::_perf_sys_classfile_bytes_read = NULL; 134 PerfCounter* ClassLoader::_sync_systemLoaderLockContentionRate = NULL; 135 PerfCounter* ClassLoader::_sync_nonSystemLoaderLockContentionRate = NULL; 136 PerfCounter* ClassLoader::_sync_JVMFindLoadedClassLockFreeCounter = NULL; 137 PerfCounter* ClassLoader::_sync_JVMDefineClassLockFreeCounter = NULL; 138 PerfCounter* ClassLoader::_sync_JNIDefineClassLockFreeCounter = NULL; 139 PerfCounter* ClassLoader::_unsafe_defineClassCallCounter = NULL; 140 PerfCounter* ClassLoader::_isUnsyncloadClass = NULL; 141 PerfCounter* ClassLoader::_load_instance_class_failCounter = NULL; 142 143 ClassPathEntry* ClassLoader::_first_entry = NULL; 144 ClassPathEntry* ClassLoader::_last_entry = NULL; 145 int ClassLoader::_num_entries = 0; 146 ClassPathEntry* ClassLoader::_first_append_entry = NULL; 147 bool ClassLoader::_has_jimage = false; 148 #if INCLUDE_CDS 149 GrowableArray<char*>* ClassLoader::_boot_modules_array = NULL; 150 GrowableArray<char*>* ClassLoader::_platform_modules_array = NULL; 151 SharedPathsMiscInfo* ClassLoader::_shared_paths_misc_info = NULL; 152 #endif 153 154 // helper routines 155 bool string_starts_with(const char* str, const char* str_to_find) { 156 size_t str_len = strlen(str); 157 size_t str_to_find_len = strlen(str_to_find); 158 if (str_to_find_len > str_len) { 159 return false; 160 } 161 return (strncmp(str, str_to_find, str_to_find_len) == 0); 162 } 163 164 static const char* get_jimage_version_string() { 165 static char version_string[10] = ""; 166 if (version_string[0] == '\0') { 167 jio_snprintf(version_string, sizeof(version_string), "%d.%d", 168 Abstract_VM_Version::vm_major_version(), Abstract_VM_Version::vm_minor_version()); 169 } 170 return (const char*)version_string; 171 } 172 173 bool ClassLoader::string_ends_with(const char* str, const char* str_to_find) { 174 size_t str_len = strlen(str); 175 size_t str_to_find_len = strlen(str_to_find); 176 if (str_to_find_len > str_len) { 177 return false; 178 } 179 return (strncmp(str + (str_len - str_to_find_len), str_to_find, str_to_find_len) == 0); 180 } 181 182 183 ClassPathDirEntry::ClassPathDirEntry(const char* dir) : ClassPathEntry() { 184 char* copy = NEW_C_HEAP_ARRAY(char, strlen(dir)+1, mtClass); 185 strcpy(copy, dir); 186 _dir = copy; 187 } 188 189 190 ClassFileStream* ClassPathDirEntry::open_stream(const char* name, TRAPS) { 191 // construct full path name 192 char path[JVM_MAXPATHLEN]; 193 if (jio_snprintf(path, sizeof(path), "%s%s%s", _dir, os::file_separator(), name) == -1) { 194 return NULL; 195 } 196 // check if file exists 197 struct stat st; 198 if (os::stat(path, &st) == 0) { 199 #if INCLUDE_CDS 200 if (DumpSharedSpaces) { 201 // We have already check in ClassLoader::check_shared_classpath() that the directory is empty, so 202 // we should never find a file underneath it -- unless user has added a new file while we are running 203 // the dump, in which case let's quit! 204 ShouldNotReachHere(); 205 } 206 #endif 207 // found file, open it 208 int file_handle = os::open(path, 0, 0); 209 if (file_handle != -1) { 210 // read contents into resource array 211 u1* buffer = NEW_RESOURCE_ARRAY(u1, st.st_size); 212 size_t num_read = os::read(file_handle, (char*) buffer, st.st_size); 213 // close file 214 os::close(file_handle); 215 // construct ClassFileStream 216 if (num_read == (size_t)st.st_size) { 217 if (UsePerfData) { 218 ClassLoader::perf_sys_classfile_bytes_read()->inc(num_read); 219 } 220 // Resource allocated 221 return new ClassFileStream(buffer, 222 st.st_size, 223 _dir, 224 ClassFileStream::verify); 225 } 226 } 227 } 228 return NULL; 229 } 230 231 ClassPathZipEntry::ClassPathZipEntry(jzfile* zip, const char* zip_name, bool is_boot_append) : ClassPathEntry() { 232 _zip = zip; 233 char *copy = NEW_C_HEAP_ARRAY(char, strlen(zip_name)+1, mtClass); 234 strcpy(copy, zip_name); 235 _zip_name = copy; 236 _is_boot_append = is_boot_append; 237 _multi_versioned = _unknown; 238 } 239 240 ClassPathZipEntry::~ClassPathZipEntry() { 241 if (ZipClose != NULL) { 242 (*ZipClose)(_zip); 243 } 244 FREE_C_HEAP_ARRAY(char, _zip_name); 245 } 246 247 u1* ClassPathZipEntry::open_entry(const char* name, jint* filesize, bool nul_terminate, TRAPS) { 248 // enable call to C land 249 JavaThread* thread = JavaThread::current(); 250 ThreadToNativeFromVM ttn(thread); 251 // check whether zip archive contains name 252 jint name_len; 253 jzentry* entry = (*FindEntry)(_zip, name, filesize, &name_len); 254 if (entry == NULL) return NULL; 255 u1* buffer; 256 char name_buf[128]; 257 char* filename; 258 if (name_len < 128) { 259 filename = name_buf; 260 } else { 261 filename = NEW_RESOURCE_ARRAY(char, name_len + 1); 262 } 263 264 // file found, get pointer to the entry in mmapped jar file. 265 if (ReadMappedEntry == NULL || 266 !(*ReadMappedEntry)(_zip, entry, &buffer, filename)) { 267 // mmapped access not available, perhaps due to compression, 268 // read contents into resource array 269 int size = (*filesize) + ((nul_terminate) ? 1 : 0); 270 buffer = NEW_RESOURCE_ARRAY(u1, size); 271 if (!(*ReadEntry)(_zip, entry, buffer, filename)) return NULL; 272 } 273 274 // return result 275 if (nul_terminate) { 276 buffer[*filesize] = 0; 277 } 278 return buffer; 279 } 280 281 #if INCLUDE_CDS 282 u1* ClassPathZipEntry::open_versioned_entry(const char* name, jint* filesize, TRAPS) { 283 u1* buffer = NULL; 284 if (!_is_boot_append) { 285 assert(DumpSharedSpaces, "Should be called only for non-boot entries during dump time"); 286 // We presume default is multi-release enabled 287 const char* multi_ver = Arguments::get_property("jdk.util.jar.enableMultiRelease"); 288 const char* verstr = Arguments::get_property("jdk.util.jar.version"); 289 bool is_multi_ver = (multi_ver == NULL || 290 strcmp(multi_ver, "true") == 0 || 291 strcmp(multi_ver, "force") == 0) && 292 is_multiple_versioned(THREAD); 293 // command line version setting 294 int version = 0; 295 const int base_version = 8; // JDK8 296 int cur_ver = JDK_Version::current().major_version(); 297 if (verstr != NULL) { 298 version = atoi(verstr); 299 if (version < base_version || version > cur_ver) { 300 is_multi_ver = false; 301 // print out warning, do not use assertion here since it will continue to look 302 // for proper version. 303 warning("JDK%d is not supported in multiple version jars", version); 304 } 305 } 306 307 if (is_multi_ver) { 308 int n; 309 char entry_name[JVM_MAXPATHLEN]; 310 if (version > 0) { 311 n = jio_snprintf(entry_name, sizeof(entry_name), "META-INF/versions/%d/%s", version, name); 312 entry_name[n] = '\0'; 313 buffer = open_entry((const char*)entry_name, filesize, false, CHECK_NULL); 314 if (buffer == NULL) { 315 warning("Could not find %s in %s, try to find highest version instead", entry_name, _zip_name); 316 } 317 } 318 if (buffer == NULL) { 319 for (int i = cur_ver; i >= base_version; i--) { 320 n = jio_snprintf(entry_name, sizeof(entry_name), "META-INF/versions/%d/%s", i, name); 321 entry_name[n] = '\0'; 322 buffer = open_entry((const char*)entry_name, filesize, false, CHECK_NULL); 323 if (buffer != NULL) { 324 break; 325 } 326 } 327 } 328 } 329 } 330 return buffer; 331 } 332 333 bool ClassPathZipEntry::is_multiple_versioned(TRAPS) { 334 assert(DumpSharedSpaces, "called only at dump time"); 335 if (_multi_versioned != _unknown) { 336 return (_multi_versioned == _yes) ? true : false; 337 } 338 jint size; 339 char* buffer = (char*)open_entry("META-INF/MANIFEST.MF", &size, true, CHECK_false); 340 if (buffer != NULL) { 341 char* p = buffer; 342 for ( ; *p; ++p) *p = tolower(*p); 343 if (strstr(buffer, "multi-release: true") != NULL) { 344 _multi_versioned = _yes; 345 return true; 346 } 347 } 348 _multi_versioned = _no; 349 return false; 350 } 351 #endif // INCLUDE_CDS 352 353 ClassFileStream* ClassPathZipEntry::open_stream(const char* name, TRAPS) { 354 jint filesize; 355 u1* buffer = open_versioned_entry(name, &filesize, CHECK_NULL); 356 if (buffer == NULL) { 357 buffer = open_entry(name, &filesize, false, CHECK_NULL); 358 if (buffer == NULL) { 359 return NULL; 360 } 361 } 362 if (UsePerfData) { 363 ClassLoader::perf_sys_classfile_bytes_read()->inc(filesize); 364 } 365 // Resource allocated 366 return new ClassFileStream(buffer, 367 filesize, 368 _zip_name, 369 ClassFileStream::verify); 370 } 371 372 // invoke function for each entry in the zip file 373 void ClassPathZipEntry::contents_do(void f(const char* name, void* context), void* context) { 374 JavaThread* thread = JavaThread::current(); 375 HandleMark handle_mark(thread); 376 ThreadToNativeFromVM ttn(thread); 377 for (int n = 0; ; n++) { 378 jzentry * ze = ((*GetNextEntry)(_zip, n)); 379 if (ze == NULL) break; 380 (*f)(ze->name, context); 381 } 382 } 383 384 ClassPathImageEntry::ClassPathImageEntry(JImageFile* jimage, const char* name) : 385 ClassPathEntry(), 386 _jimage(jimage) { 387 guarantee(jimage != NULL, "jimage file is null"); 388 guarantee(name != NULL, "jimage file name is null"); 389 size_t len = strlen(name) + 1; 390 _name = NEW_C_HEAP_ARRAY(const char, len, mtClass); 391 strncpy((char *)_name, name, len); 392 } 393 394 ClassPathImageEntry::~ClassPathImageEntry() { 395 if (_name != NULL) { 396 FREE_C_HEAP_ARRAY(const char, _name); 397 _name = NULL; 398 } 399 if (_jimage != NULL) { 400 (*JImageClose)(_jimage); 401 _jimage = NULL; 402 } 403 } 404 405 void ClassPathImageEntry::name_to_package(const char* name, char* buffer, int length) { 406 const char *pslash = strrchr(name, '/'); 407 if (pslash == NULL) { 408 buffer[0] = '\0'; 409 return; 410 } 411 int len = pslash - name; 412 #if INCLUDE_CDS 413 if (len <= 0 && DumpSharedSpaces) { 414 buffer[0] = '\0'; 415 return; 416 } 417 #endif 418 assert(len > 0, "Bad length for package name"); 419 if (len >= length) { 420 buffer[0] = '\0'; 421 return; 422 } 423 // drop name after last slash (including slash) 424 // Ex., "java/lang/String.class" => "java/lang" 425 strncpy(buffer, name, len); 426 // ensure string termination (strncpy does not guarantee) 427 buffer[len] = '\0'; 428 } 429 430 // For a class in a named module, look it up in the jimage file using this syntax: 431 // /<module-name>/<package-name>/<base-class> 432 // 433 // Assumptions: 434 // 1. There are no unnamed modules in the jimage file. 435 // 2. A package is in at most one module in the jimage file. 436 // 437 ClassFileStream* ClassPathImageEntry::open_stream(const char* name, TRAPS) { 438 jlong size; 439 JImageLocationRef location = (*JImageFindResource)(_jimage, "", get_jimage_version_string(), name, &size); 440 441 if (location == 0) { 442 char package[JIMAGE_MAX_PATH]; 443 name_to_package(name, package, JIMAGE_MAX_PATH); 444 445 #if INCLUDE_CDS 446 if (package[0] == '\0' && DumpSharedSpaces) { 447 return NULL; 448 } 449 #endif 450 if (package[0] != '\0') { 451 if (!Universe::is_module_initialized()) { 452 location = (*JImageFindResource)(_jimage, "java.base", get_jimage_version_string(), name, &size); 453 #if INCLUDE_CDS 454 // CDS uses the boot class loader to load classes whose packages are in 455 // modules defined for other class loaders. So, for now, get their module 456 // names from the "modules" jimage file. 457 if (DumpSharedSpaces && location == 0) { 458 const char* module_name = (*JImagePackageToModule)(_jimage, package); 459 if (module_name != NULL) { 460 location = (*JImageFindResource)(_jimage, module_name, get_jimage_version_string(), name, &size); 461 } 462 } 463 #endif 464 465 } else { 466 // Get boot class loader's package entry table 467 PackageEntryTable* pkgEntryTable = 468 ClassLoaderData::the_null_class_loader_data()->packages(); 469 // Get package's package entry 470 TempNewSymbol pkg_symbol = SymbolTable::new_symbol(package, CHECK_NULL); 471 PackageEntry* package_entry = pkgEntryTable->lookup_only(pkg_symbol); 472 473 if (package_entry != NULL) { 474 ResourceMark rm; 475 // Get the module name 476 ModuleEntry* module = package_entry->module(); 477 assert(module != NULL, "Boot classLoader package missing module"); 478 assert(module->is_named(), "Boot classLoader package is in unnamed module"); 479 const char* module_name = module->name()->as_C_string(); 480 if (module_name != NULL) { 481 location = (*JImageFindResource)(_jimage, module_name, get_jimage_version_string(), name, &size); 482 } 483 } 484 } 485 } 486 } 487 if (location != 0) { 488 if (UsePerfData) { 489 ClassLoader::perf_sys_classfile_bytes_read()->inc(size); 490 } 491 char* data = NEW_RESOURCE_ARRAY(char, size); 492 (*JImageGetResource)(_jimage, location, data, size); 493 // Resource allocated 494 return new ClassFileStream((u1*)data, 495 (int)size, 496 _name, 497 ClassFileStream::verify); 498 } 499 500 return NULL; 501 } 502 503 #ifndef PRODUCT 504 bool ctw_visitor(JImageFile* jimage, 505 const char* module_name, const char* version, const char* package, 506 const char* name, const char* extension, void* arg) { 507 if (strcmp(extension, "class") == 0) { 508 Thread* THREAD = Thread::current(); 509 char path[JIMAGE_MAX_PATH]; 510 jio_snprintf(path, JIMAGE_MAX_PATH - 1, "%s/%s.class", package, name); 511 ClassLoader::compile_the_world_in(path, *(Handle*)arg, THREAD); 512 return !HAS_PENDING_EXCEPTION; 513 } 514 return true; 515 } 516 517 void ClassPathImageEntry::compile_the_world(Handle loader, TRAPS) { 518 tty->print_cr("CompileTheWorld : Compiling all classes in %s", name()); 519 tty->cr(); 520 (*JImageResourceIterator)(_jimage, (JImageResourceVisitor_t)ctw_visitor, (void *)&loader); 521 if (HAS_PENDING_EXCEPTION) { 522 if (PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())) { 523 CLEAR_PENDING_EXCEPTION; 524 tty->print_cr("\nCompileTheWorld : Ran out of memory\n"); 525 tty->print_cr("Increase class metadata storage if a limit was set"); 526 } else { 527 tty->print_cr("\nCompileTheWorld : Unexpected exception occurred\n"); 528 } 529 } 530 } 531 #endif 532 533 bool ClassPathImageEntry::is_jrt() { 534 return ClassLoader::is_jrt(name()); 535 } 536 537 #if INCLUDE_CDS 538 void ClassLoader::exit_with_path_failure(const char* error, const char* message) { 539 assert(DumpSharedSpaces, "only called at dump time"); 540 tty->print_cr("Hint: enable -Xlog:class+path=info to diagnose the failure"); 541 vm_exit_during_initialization(error, message); 542 } 543 #endif 544 545 void ClassLoader::trace_class_path(const char* msg, const char* name) { 546 if (log_is_enabled(Info, class, path)) { 547 ResourceMark rm; 548 outputStream* out = Log(class, path)::info_stream(); 549 if (msg) { 550 out->print("%s", msg); 551 } 552 if (name) { 553 if (strlen(name) < 256) { 554 out->print("%s", name); 555 } else { 556 // For very long paths, we need to print each character separately, 557 // as print_cr() has a length limit 558 while (name[0] != '\0') { 559 out->print("%c", name[0]); 560 name++; 561 } 562 } 563 } 564 out->cr(); 565 } 566 } 567 568 #if INCLUDE_CDS 569 void ClassLoader::check_shared_classpath(const char *path) { 570 if (strcmp(path, "") == 0) { 571 exit_with_path_failure("Cannot have empty path in archived classpaths", NULL); 572 } 573 574 struct stat st; 575 if (os::stat(path, &st) == 0) { 576 if ((st.st_mode & S_IFREG) != S_IFREG) { // is directory 577 if (!os::dir_is_empty(path)) { 578 tty->print_cr("Error: non-empty directory '%s'", path); 579 exit_with_path_failure("CDS allows only empty directories in archived classpaths", NULL); 580 } 581 } 582 } 583 } 584 #endif 585 586 void ClassLoader::setup_bootstrap_search_path() { 587 assert(_first_entry == NULL, "should not setup bootstrap class search path twice"); 588 const char* sys_class_path = Arguments::get_sysclasspath(); 589 const char* java_class_path = Arguments::get_appclasspath(); 590 if (PrintSharedArchiveAndExit) { 591 // Don't print sys_class_path - this is the bootcp of this current VM process, not necessarily 592 // the same as the bootcp of the shared archive. 593 } else { 594 trace_class_path("bootstrap loader class path=", sys_class_path); 595 trace_class_path("classpath: ", java_class_path); 596 } 597 #if INCLUDE_CDS 598 if (DumpSharedSpaces) { 599 _shared_paths_misc_info->add_boot_classpath(sys_class_path); 600 } 601 #endif 602 setup_search_path(sys_class_path, true); 603 } 604 605 #if INCLUDE_CDS 606 int ClassLoader::get_shared_paths_misc_info_size() { 607 return _shared_paths_misc_info->get_used_bytes(); 608 } 609 610 void* ClassLoader::get_shared_paths_misc_info() { 611 return _shared_paths_misc_info->buffer(); 612 } 613 614 bool ClassLoader::check_shared_paths_misc_info(void *buf, int size) { 615 SharedPathsMiscInfo* checker = SharedClassUtil::allocate_shared_paths_misc_info((char*)buf, size); 616 bool result = checker->check(); 617 delete checker; 618 return result; 619 } 620 #endif 621 622 void ClassLoader::setup_search_path(const char *class_path, bool bootstrap_search) { 623 int offset = 0; 624 int len = (int)strlen(class_path); 625 int end = 0; 626 bool mark_append_entry = false; 627 628 // Iterate over class path entries 629 for (int start = 0; start < len; start = end) { 630 while (class_path[end] && class_path[end] != os::path_separator()[0]) { 631 end++; 632 } 633 EXCEPTION_MARK; 634 ResourceMark rm(THREAD); 635 mark_append_entry = (mark_append_entry || 636 (bootstrap_search && (start == Arguments::bootclassloader_append_index()))); 637 char* path = NEW_RESOURCE_ARRAY(char, end - start + 1); 638 strncpy(path, &class_path[start], end - start); 639 path[end - start] = '\0'; 640 update_class_path_entry_list(path, false, mark_append_entry, false, bootstrap_search); 641 642 // Check on the state of the boot loader's append path 643 if (mark_append_entry && (_first_append_entry == NULL)) { 644 // Failure to mark the first append entry, most likely 645 // due to a non-existent path. Record the next entry 646 // as the first boot loader append entry. 647 mark_append_entry = true; 648 } else { 649 mark_append_entry = false; 650 } 651 652 #if INCLUDE_CDS 653 if (DumpSharedSpaces) { 654 check_shared_classpath(path); 655 } 656 #endif 657 while (class_path[end] == os::path_separator()[0]) { 658 end++; 659 } 660 } 661 } 662 663 ClassPathEntry* ClassLoader::create_class_path_entry(const char *path, const struct stat* st, 664 bool throw_exception, 665 bool is_boot_append, TRAPS) { 666 JavaThread* thread = JavaThread::current(); 667 ClassPathEntry* new_entry = NULL; 668 if ((st->st_mode & S_IFREG) == S_IFREG) { 669 // Regular file, should be a zip or jimage file 670 // Canonicalized filename 671 char canonical_path[JVM_MAXPATHLEN]; 672 if (!get_canonical_path(path, canonical_path, JVM_MAXPATHLEN)) { 673 // This matches the classic VM 674 if (throw_exception) { 675 THROW_MSG_(vmSymbols::java_io_IOException(), "Bad pathname", NULL); 676 } else { 677 return NULL; 678 } 679 } 680 jint error; 681 JImageFile* jimage =(*JImageOpen)(canonical_path, &error); 682 if (jimage != NULL) { 683 new_entry = new ClassPathImageEntry(jimage, canonical_path); 684 } else { 685 char* error_msg = NULL; 686 jzfile* zip; 687 { 688 // enable call to C land 689 ThreadToNativeFromVM ttn(thread); 690 HandleMark hm(thread); 691 zip = (*ZipOpen)(canonical_path, &error_msg); 692 } 693 if (zip != NULL && error_msg == NULL) { 694 new_entry = new ClassPathZipEntry(zip, path, is_boot_append); 695 } else { 696 ResourceMark rm(thread); 697 char *msg; 698 if (error_msg == NULL) { 699 msg = NEW_RESOURCE_ARRAY(char, strlen(path) + 128); ; 700 jio_snprintf(msg, strlen(path) + 127, "error in opening JAR file %s", path); 701 } else { 702 int len = (int)(strlen(path) + strlen(error_msg) + 128); 703 msg = NEW_RESOURCE_ARRAY(char, len); ; 704 jio_snprintf(msg, len - 1, "error in opening JAR file <%s> %s", error_msg, path); 705 } 706 // Don't complain about bad jar files added via -Xbootclasspath/a:. 707 if (throw_exception && is_init_completed()) { 708 THROW_MSG_(vmSymbols::java_lang_ClassNotFoundException(), msg, NULL); 709 } else { 710 return NULL; 711 } 712 } 713 } 714 log_info(class, path)("opened: %s", path); 715 log_info(class, load)("opened: %s", path); 716 } else { 717 // Directory 718 new_entry = new ClassPathDirEntry(path); 719 log_info(class, load)("path: %s", path); 720 } 721 return new_entry; 722 } 723 724 725 // Create a class path zip entry for a given path (return NULL if not found 726 // or zip/JAR file cannot be opened) 727 ClassPathZipEntry* ClassLoader::create_class_path_zip_entry(const char *path, bool is_boot_append) { 728 // check for a regular file 729 struct stat st; 730 if (os::stat(path, &st) == 0) { 731 if ((st.st_mode & S_IFREG) == S_IFREG) { 732 char canonical_path[JVM_MAXPATHLEN]; 733 if (get_canonical_path(path, canonical_path, JVM_MAXPATHLEN)) { 734 char* error_msg = NULL; 735 jzfile* zip; 736 { 737 // enable call to C land 738 JavaThread* thread = JavaThread::current(); 739 ThreadToNativeFromVM ttn(thread); 740 HandleMark hm(thread); 741 zip = (*ZipOpen)(canonical_path, &error_msg); 742 } 743 if (zip != NULL && error_msg == NULL) { 744 // create using canonical path 745 return new ClassPathZipEntry(zip, canonical_path, is_boot_append); 746 } 747 } 748 } 749 } 750 return NULL; 751 } 752 753 // The boot class loader must adhere to specfic visibility rules. 754 // Prior to loading a class in a named package, the package is checked 755 // to see if it is in a module defined to the boot loader. If the 756 // package is not in a module defined to the boot loader, the class 757 // must be loaded only in the boot loader's append path, which 758 // consists of [-Xbootclasspath/a]; [jvmti appended entries] 759 void ClassLoader::set_first_append_entry(ClassPathEntry *new_entry) { 760 if (_first_append_entry == NULL) { 761 _first_append_entry = new_entry; 762 } 763 } 764 765 // returns true if entry already on class path 766 bool ClassLoader::contains_entry(ClassPathEntry *entry) { 767 ClassPathEntry* e = _first_entry; 768 while (e != NULL) { 769 // assume zip entries have been canonicalized 770 if (strcmp(entry->name(), e->name()) == 0) { 771 return true; 772 } 773 e = e->next(); 774 } 775 return false; 776 } 777 778 void ClassLoader::add_to_list(ClassPathEntry *new_entry) { 779 if (new_entry != NULL) { 780 if (_last_entry == NULL) { 781 _first_entry = _last_entry = new_entry; 782 } else { 783 _last_entry->set_next(new_entry); 784 _last_entry = new_entry; 785 } 786 } 787 _num_entries ++; 788 } 789 790 void ClassLoader::prepend_to_list(ClassPathEntry *new_entry) { 791 if (new_entry != NULL) { 792 if (_last_entry == NULL) { 793 _first_entry = _last_entry = new_entry; 794 } else { 795 new_entry->set_next(_first_entry); 796 _first_entry = new_entry; 797 } 798 } 799 _num_entries ++; 800 } 801 802 void ClassLoader::add_to_list(const char *apath) { 803 update_class_path_entry_list((char*)apath, false, false, false, false); 804 } 805 806 void ClassLoader::prepend_to_list(const char *apath) { 807 update_class_path_entry_list((char*)apath, false, false, true, false); 808 } 809 810 // Returns true IFF the file/dir exists and the entry was successfully created. 811 bool ClassLoader::update_class_path_entry_list(const char *path, 812 bool check_for_duplicates, 813 bool mark_append_entry, 814 bool prepend_entry, 815 bool is_boot_append, 816 bool throw_exception) { 817 struct stat st; 818 if (os::stat(path, &st) == 0) { 819 // File or directory found 820 ClassPathEntry* new_entry = NULL; 821 Thread* THREAD = Thread::current(); 822 new_entry = create_class_path_entry(path, &st, throw_exception, is_boot_append, CHECK_(false)); 823 if (new_entry == NULL) { 824 return false; 825 } 826 827 // Ensure that the first boot loader append entry will always be set correctly. 828 assert((!mark_append_entry || 829 (mark_append_entry && (!check_for_duplicates || !contains_entry(new_entry)))), 830 "failed to mark boot loader's first append boundary"); 831 832 // Do not reorder the bootclasspath which would break get_system_package(). 833 // Add new entry to linked list 834 835 if (!check_for_duplicates || !contains_entry(new_entry)) { 836 ClassLoaderExt::add_class_path_entry(path, check_for_duplicates, new_entry, prepend_entry); 837 if (mark_append_entry) { 838 set_first_append_entry(new_entry); 839 } 840 } 841 return true; 842 } else { 843 #if INCLUDE_CDS 844 if (DumpSharedSpaces) { 845 _shared_paths_misc_info->add_nonexist_path(path); 846 } 847 #endif 848 return false; 849 } 850 } 851 852 void ClassLoader::print_bootclasspath() { 853 ClassPathEntry* e = _first_entry; 854 tty->print("[bootclasspath= "); 855 while (e != NULL) { 856 tty->print("%s ;", e->name()); 857 e = e->next(); 858 } 859 tty->print_cr("]"); 860 } 861 862 void ClassLoader::load_zip_library() { 863 assert(ZipOpen == NULL, "should not load zip library twice"); 864 // First make sure native library is loaded 865 os::native_java_library(); 866 // Load zip library 867 char path[JVM_MAXPATHLEN]; 868 char ebuf[1024]; 869 void* handle = NULL; 870 if (os::dll_build_name(path, sizeof(path), Arguments::get_dll_dir(), "zip")) { 871 handle = os::dll_load(path, ebuf, sizeof ebuf); 872 } 873 if (handle == NULL) { 874 vm_exit_during_initialization("Unable to load ZIP library", path); 875 } 876 // Lookup zip entry points 877 ZipOpen = CAST_TO_FN_PTR(ZipOpen_t, os::dll_lookup(handle, "ZIP_Open")); 878 ZipClose = CAST_TO_FN_PTR(ZipClose_t, os::dll_lookup(handle, "ZIP_Close")); 879 FindEntry = CAST_TO_FN_PTR(FindEntry_t, os::dll_lookup(handle, "ZIP_FindEntry")); 880 ReadEntry = CAST_TO_FN_PTR(ReadEntry_t, os::dll_lookup(handle, "ZIP_ReadEntry")); 881 ReadMappedEntry = CAST_TO_FN_PTR(ReadMappedEntry_t, os::dll_lookup(handle, "ZIP_ReadMappedEntry")); 882 GetNextEntry = CAST_TO_FN_PTR(GetNextEntry_t, os::dll_lookup(handle, "ZIP_GetNextEntry")); 883 ZipInflateFully = CAST_TO_FN_PTR(ZipInflateFully_t, os::dll_lookup(handle, "ZIP_InflateFully")); 884 Crc32 = CAST_TO_FN_PTR(Crc32_t, os::dll_lookup(handle, "ZIP_CRC32")); 885 886 // ZIP_Close is not exported on Windows in JDK5.0 so don't abort if ZIP_Close is NULL 887 if (ZipOpen == NULL || FindEntry == NULL || ReadEntry == NULL || 888 GetNextEntry == NULL || Crc32 == NULL) { 889 vm_exit_during_initialization("Corrupted ZIP library", path); 890 } 891 892 if (ZipInflateFully == NULL) { 893 vm_exit_during_initialization("Corrupted ZIP library ZIP_InflateFully missing", path); 894 } 895 896 // Lookup canonicalize entry in libjava.dll 897 void *javalib_handle = os::native_java_library(); 898 CanonicalizeEntry = CAST_TO_FN_PTR(canonicalize_fn_t, os::dll_lookup(javalib_handle, "Canonicalize")); 899 // This lookup only works on 1.3. Do not check for non-null here 900 } 901 902 void ClassLoader::load_jimage_library() { 903 // First make sure native library is loaded 904 os::native_java_library(); 905 // Load jimage library 906 char path[JVM_MAXPATHLEN]; 907 char ebuf[1024]; 908 void* handle = NULL; 909 if (os::dll_build_name(path, sizeof(path), Arguments::get_dll_dir(), "jimage")) { 910 handle = os::dll_load(path, ebuf, sizeof ebuf); 911 } 912 if (handle == NULL) { 913 vm_exit_during_initialization("Unable to load jimage library", path); 914 } 915 916 // Lookup jimage entry points 917 JImageOpen = CAST_TO_FN_PTR(JImageOpen_t, os::dll_lookup(handle, "JIMAGE_Open")); 918 guarantee(JImageOpen != NULL, "function JIMAGE_Open not found"); 919 JImageClose = CAST_TO_FN_PTR(JImageClose_t, os::dll_lookup(handle, "JIMAGE_Close")); 920 guarantee(JImageClose != NULL, "function JIMAGE_Close not found"); 921 JImagePackageToModule = CAST_TO_FN_PTR(JImagePackageToModule_t, os::dll_lookup(handle, "JIMAGE_PackageToModule")); 922 guarantee(JImagePackageToModule != NULL, "function JIMAGE_PackageToModule not found"); 923 JImageFindResource = CAST_TO_FN_PTR(JImageFindResource_t, os::dll_lookup(handle, "JIMAGE_FindResource")); 924 guarantee(JImageFindResource != NULL, "function JIMAGE_FindResource not found"); 925 JImageGetResource = CAST_TO_FN_PTR(JImageGetResource_t, os::dll_lookup(handle, "JIMAGE_GetResource")); 926 guarantee(JImageGetResource != NULL, "function JIMAGE_GetResource not found"); 927 JImageResourceIterator = CAST_TO_FN_PTR(JImageResourceIterator_t, os::dll_lookup(handle, "JIMAGE_ResourceIterator")); 928 guarantee(JImageResourceIterator != NULL, "function JIMAGE_ResourceIterator not found"); 929 JImageResourcePath = CAST_TO_FN_PTR(JImage_ResourcePath_t, os::dll_lookup(handle, "JIMAGE_ResourcePath")); 930 guarantee(JImageResourcePath != NULL, "function JIMAGE_ResourcePath not found"); 931 } 932 933 jboolean ClassLoader::decompress(void *in, u8 inSize, void *out, u8 outSize, char **pmsg) { 934 return (*ZipInflateFully)(in, inSize, out, outSize, pmsg); 935 } 936 937 int ClassLoader::crc32(int crc, const char* buf, int len) { 938 assert(Crc32 != NULL, "ZIP_CRC32 is not found"); 939 return (*Crc32)(crc, (const jbyte*)buf, len); 940 } 941 942 #if INCLUDE_CDS 943 void ClassLoader::initialize_module_loader_map(JImageFile* jimage) { 944 if (!DumpSharedSpaces) { 945 return; // only needed for CDS dump time 946 } 947 948 jlong size; 949 JImageLocationRef location = (*JImageFindResource)(jimage, "java.base", get_jimage_version_string(), MODULE_LOADER_MAP, &size); 950 if (location == 0) { 951 vm_exit_during_initialization( 952 "Cannot find ModuleLoaderMap location from modules jimage.", NULL); 953 } 954 char* buffer = NEW_RESOURCE_ARRAY(char, size); 955 jlong read = (*JImageGetResource)(jimage, location, buffer, size); 956 if (read != size) { 957 vm_exit_during_initialization( 958 "Cannot find ModuleLoaderMap resource from modules jimage.", NULL); 959 } 960 char* char_buf = (char*)buffer; 961 int buflen = (int)strlen(char_buf); 962 char* begin_ptr = char_buf; 963 char* end_ptr = strchr(begin_ptr, '\n'); 964 bool process_boot_modules = false; 965 _boot_modules_array = new (ResourceObj::C_HEAP, mtInternal) 966 GrowableArray<char*>(INITIAL_BOOT_MODULES_ARRAY_SIZE, true); 967 _platform_modules_array = new (ResourceObj::C_HEAP, mtInternal) 968 GrowableArray<char*>(INITIAL_PLATFORM_MODULES_ARRAY_SIZE, true); 969 while (end_ptr != NULL && (end_ptr - char_buf) < buflen) { 970 // Allocate a buffer from the C heap to be appended to the _boot_modules_array 971 // or the _platform_modules_array. 972 char* temp_name = NEW_C_HEAP_ARRAY(char, (size_t)(end_ptr - begin_ptr + 1), mtInternal); 973 strncpy(temp_name, begin_ptr, end_ptr - begin_ptr); 974 temp_name[end_ptr - begin_ptr] = '\0'; 975 if (strncmp(temp_name, "BOOT", 4) == 0) { 976 process_boot_modules = true; 977 FREE_C_HEAP_ARRAY(char, temp_name); 978 } else if (strncmp(temp_name, "PLATFORM", 8) == 0) { 979 process_boot_modules = false; 980 FREE_C_HEAP_ARRAY(char, temp_name); 981 } else { 982 // module name 983 if (process_boot_modules) { 984 _boot_modules_array->append(temp_name); 985 } else { 986 _platform_modules_array->append(temp_name); 987 } 988 } 989 begin_ptr = ++end_ptr; 990 end_ptr = strchr(begin_ptr, '\n'); 991 } 992 FREE_RESOURCE_ARRAY(u1, buffer, size); 993 } 994 #endif 995 996 // Function add_package extracts the package from the fully qualified class name 997 // and checks if the package is in the boot loader's package entry table. If so, 998 // then it sets the classpath_index in the package entry record. 999 // 1000 // The classpath_index field is used to find the entry on the boot loader class 1001 // path for packages with classes loaded by the boot loader from -Xbootclasspath/a 1002 // in an unnamed module. It is also used to indicate (for all packages whose 1003 // classes are loaded by the boot loader) that at least one of the package's 1004 // classes has been loaded. 1005 bool ClassLoader::add_package(const char *fullq_class_name, s2 classpath_index, TRAPS) { 1006 assert(fullq_class_name != NULL, "just checking"); 1007 1008 // Get package name from fully qualified class name. 1009 const char *cp = strrchr(fullq_class_name, '/'); 1010 if (cp != NULL) { 1011 int len = cp - fullq_class_name; 1012 PackageEntryTable* pkg_entry_tbl = 1013 ClassLoaderData::the_null_class_loader_data()->packages(); 1014 TempNewSymbol pkg_symbol = 1015 SymbolTable::new_symbol(fullq_class_name, len, CHECK_false); 1016 PackageEntry* pkg_entry = pkg_entry_tbl->lookup_only(pkg_symbol); 1017 if (pkg_entry != NULL) { 1018 assert(classpath_index != -1, "Unexpected classpath_index"); 1019 pkg_entry->set_classpath_index(classpath_index); 1020 } else { 1021 return false; 1022 } 1023 } 1024 return true; 1025 } 1026 1027 oop ClassLoader::get_system_package(const char* name, TRAPS) { 1028 // Look up the name in the boot loader's package entry table. 1029 if (name != NULL) { 1030 TempNewSymbol package_sym = SymbolTable::new_symbol(name, (int)strlen(name), CHECK_NULL); 1031 // Look for the package entry in the boot loader's package entry table. 1032 PackageEntry* package = 1033 ClassLoaderData::the_null_class_loader_data()->packages()->lookup_only(package_sym); 1034 1035 // Return NULL if package does not exist or if no classes in that package 1036 // have been loaded. 1037 if (package != NULL && package->has_loaded_class()) { 1038 ModuleEntry* module = package->module(); 1039 if (module->location() != NULL) { 1040 ResourceMark rm(THREAD); 1041 Handle ml = java_lang_String::create_from_str( 1042 module->location()->as_C_string(), THREAD); 1043 return ml(); 1044 } 1045 // Return entry on boot loader class path. 1046 Handle cph = java_lang_String::create_from_str( 1047 ClassLoader::classpath_entry(package->classpath_index())->name(), THREAD); 1048 return cph(); 1049 } 1050 } 1051 return NULL; 1052 } 1053 1054 objArrayOop ClassLoader::get_system_packages(TRAPS) { 1055 ResourceMark rm(THREAD); 1056 // List of pointers to PackageEntrys that have loaded classes. 1057 GrowableArray<PackageEntry*>* loaded_class_pkgs = new GrowableArray<PackageEntry*>(50); 1058 { 1059 MutexLocker ml(Module_lock, THREAD); 1060 1061 PackageEntryTable* pe_table = 1062 ClassLoaderData::the_null_class_loader_data()->packages(); 1063 1064 // Collect the packages that have at least one loaded class. 1065 for (int x = 0; x < pe_table->table_size(); x++) { 1066 for (PackageEntry* package_entry = pe_table->bucket(x); 1067 package_entry != NULL; 1068 package_entry = package_entry->next()) { 1069 if (package_entry->has_loaded_class()) { 1070 loaded_class_pkgs->append(package_entry); 1071 } 1072 } 1073 } 1074 } 1075 1076 1077 // Allocate objArray and fill with java.lang.String 1078 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 1079 loaded_class_pkgs->length(), CHECK_NULL); 1080 objArrayHandle result(THREAD, r); 1081 for (int x = 0; x < loaded_class_pkgs->length(); x++) { 1082 PackageEntry* package_entry = loaded_class_pkgs->at(x); 1083 Handle str = java_lang_String::create_from_symbol(package_entry->name(), CHECK_NULL); 1084 result->obj_at_put(x, str()); 1085 } 1086 return result(); 1087 } 1088 1089 #if INCLUDE_CDS 1090 s2 ClassLoader::module_to_classloader(const char* module_name) { 1091 1092 assert(DumpSharedSpaces, "dump time only"); 1093 assert(_boot_modules_array != NULL, "_boot_modules_array is NULL"); 1094 assert(_platform_modules_array != NULL, "_platform_modules_array is NULL"); 1095 1096 int array_size = _boot_modules_array->length(); 1097 for (int i = 0; i < array_size; i++) { 1098 if (strcmp(module_name, _boot_modules_array->at(i)) == 0) { 1099 return BOOT_LOADER; 1100 } 1101 } 1102 1103 array_size = _platform_modules_array->length(); 1104 for (int i = 0; i < array_size; i++) { 1105 if (strcmp(module_name, _platform_modules_array->at(i)) == 0) { 1106 return PLATFORM_LOADER; 1107 } 1108 } 1109 1110 return APP_LOADER; 1111 } 1112 1113 s2 ClassLoader::classloader_type(Symbol* class_name, ClassPathEntry* e, 1114 int classpath_index, TRAPS) { 1115 assert(DumpSharedSpaces, "Only used for CDS dump time"); 1116 1117 // obtain the classloader type based on the class name. 1118 // First obtain the package name based on the class name. Then obtain 1119 // the classloader type based on the package name from the jimage using 1120 // a jimage API. If the classloader type cannot be found from the 1121 // jimage, it is determined by the class path entry. 1122 jshort loader_type = ClassLoader::APP_LOADER; 1123 if (e->is_jrt()) { 1124 int length = 0; 1125 const jbyte* pkg_string = InstanceKlass::package_from_name(class_name, length); 1126 if (pkg_string != NULL) { 1127 ResourceMark rm; 1128 TempNewSymbol pkg_name = SymbolTable::new_symbol((const char*)pkg_string, length, THREAD); 1129 const char* pkg_name_C_string = (const char*)(pkg_name->as_C_string()); 1130 ClassPathImageEntry* cpie = (ClassPathImageEntry*)e; 1131 JImageFile* jimage = cpie->jimage(); 1132 char* module_name = (char*)(*JImagePackageToModule)(jimage, pkg_name_C_string); 1133 if (module_name != NULL) { 1134 loader_type = ClassLoader::module_to_classloader(module_name); 1135 } 1136 } 1137 } else if (ClassLoaderExt::is_boot_classpath(classpath_index)) { 1138 loader_type = ClassLoader::BOOT_LOADER; 1139 } 1140 return loader_type; 1141 } 1142 #endif 1143 1144 // caller needs ResourceMark 1145 const char* ClassLoader::file_name_for_class_name(const char* class_name, 1146 int class_name_len) { 1147 assert(class_name != NULL, "invariant"); 1148 assert((int)strlen(class_name) == class_name_len, "invariant"); 1149 1150 static const char class_suffix[] = ".class"; 1151 1152 char* const file_name = NEW_RESOURCE_ARRAY(char, 1153 class_name_len + 1154 sizeof(class_suffix)); // includes term NULL 1155 1156 strncpy(file_name, class_name, class_name_len); 1157 strncpy(&file_name[class_name_len], class_suffix, sizeof(class_suffix)); 1158 1159 return file_name; 1160 } 1161 1162 instanceKlassHandle ClassLoader::load_class(Symbol* name, bool search_append_only, TRAPS) { 1163 1164 assert(name != NULL, "invariant"); 1165 assert(THREAD->is_Java_thread(), "must be a JavaThread"); 1166 1167 ResourceMark rm; 1168 HandleMark hm; 1169 1170 const char* const class_name = name->as_C_string(); 1171 1172 EventMark m("loading class %s", class_name); 1173 ThreadProfilerMark tpm(ThreadProfilerMark::classLoaderRegion); 1174 1175 const char* const file_name = file_name_for_class_name(class_name, 1176 name->utf8_length()); 1177 assert(file_name != NULL, "invariant"); 1178 1179 ClassLoaderExt::Context context(class_name, file_name, THREAD); 1180 1181 // Lookup stream for parsing .class file 1182 ClassFileStream* stream = NULL; 1183 s2 classpath_index = 0; 1184 1185 // If DumpSharedSpaces is true, boot loader visibility boundaries are set 1186 // to be _first_entry to the end (all path entries). 1187 // 1188 // If search_append_only is true, boot loader visibility boundaries are 1189 // set to be _fist_append_entry to the end. This includes: 1190 // [-Xbootclasspath/a]; [jvmti appended entries] 1191 // 1192 // If both DumpSharedSpaces and search_append_only are false, boot loader 1193 // visibility boundaries are set to be _first_entry to the entry before 1194 // the _first_append_entry. This would include: 1195 // [-Xpatch:<dirs>]; [exploded build | modules] 1196 // 1197 // DumpSharedSpaces and search_append_only are mutually exclusive and cannot 1198 // be true at the same time. 1199 ClassPathEntry* e = (search_append_only ? _first_append_entry : _first_entry); 1200 ClassPathEntry* last_e = 1201 (search_append_only || DumpSharedSpaces ? NULL : _first_append_entry); 1202 1203 { 1204 if (search_append_only) { 1205 // For the boot loader append path search, must calculate 1206 // the starting classpath_index prior to attempting to 1207 // load the classfile. 1208 ClassPathEntry *tmp_e = _first_entry; 1209 while ((tmp_e != NULL) && (tmp_e != _first_append_entry)) { 1210 tmp_e = tmp_e->next(); 1211 ++classpath_index; 1212 } 1213 } 1214 1215 // Attempt to load the classfile from either: 1216 // - [-Xpatch:dir]; exploded build | modules 1217 // or 1218 // - [-Xbootclasspath/a]; [jvmti appended entries] 1219 while ((e != NULL) && (e != last_e)) { 1220 stream = e->open_stream(file_name, CHECK_NULL); 1221 if (!context.check(stream, classpath_index)) { 1222 return NULL; 1223 } 1224 if (NULL != stream) { 1225 break; 1226 } 1227 e = e->next(); 1228 ++classpath_index; 1229 } 1230 } 1231 1232 if (NULL == stream) { 1233 if (DumpSharedSpaces) { 1234 tty->print_cr("Preload Warning: Cannot find %s", class_name); 1235 } 1236 return NULL; 1237 } 1238 1239 stream->set_verify(context.should_verify(classpath_index)); 1240 1241 ClassLoaderData* loader_data = ClassLoaderData::the_null_class_loader_data(); 1242 Handle protection_domain; 1243 1244 instanceKlassHandle result = KlassFactory::create_from_stream(stream, 1245 name, 1246 loader_data, 1247 protection_domain, 1248 NULL, // host_klass 1249 NULL, // cp_patches 1250 NULL, // parsed_name 1251 THREAD); 1252 if (HAS_PENDING_EXCEPTION) { 1253 if (DumpSharedSpaces) { 1254 tty->print_cr("Preload Error: Failed to load %s", class_name); 1255 } 1256 return NULL; 1257 } 1258 1259 return context.record_result(name, e, classpath_index, result, THREAD); 1260 } 1261 1262 // Initialize the class loader's access to methods in libzip. Parse and 1263 // process the boot classpath into a list ClassPathEntry objects. Once 1264 // this list has been created, it must not change order (see class PackageInfo) 1265 // it can be appended to and is by jvmti and the kernel vm. 1266 1267 void ClassLoader::initialize() { 1268 EXCEPTION_MARK; 1269 1270 if (UsePerfData) { 1271 // jvmstat performance counters 1272 NEWPERFTICKCOUNTER(_perf_accumulated_time, SUN_CLS, "time"); 1273 NEWPERFTICKCOUNTER(_perf_class_init_time, SUN_CLS, "classInitTime"); 1274 NEWPERFTICKCOUNTER(_perf_class_init_selftime, SUN_CLS, "classInitTime.self"); 1275 NEWPERFTICKCOUNTER(_perf_class_verify_time, SUN_CLS, "classVerifyTime"); 1276 NEWPERFTICKCOUNTER(_perf_class_verify_selftime, SUN_CLS, "classVerifyTime.self"); 1277 NEWPERFTICKCOUNTER(_perf_class_link_time, SUN_CLS, "classLinkedTime"); 1278 NEWPERFTICKCOUNTER(_perf_class_link_selftime, SUN_CLS, "classLinkedTime.self"); 1279 NEWPERFEVENTCOUNTER(_perf_classes_inited, SUN_CLS, "initializedClasses"); 1280 NEWPERFEVENTCOUNTER(_perf_classes_linked, SUN_CLS, "linkedClasses"); 1281 NEWPERFEVENTCOUNTER(_perf_classes_verified, SUN_CLS, "verifiedClasses"); 1282 1283 NEWPERFTICKCOUNTER(_perf_class_parse_time, SUN_CLS, "parseClassTime"); 1284 NEWPERFTICKCOUNTER(_perf_class_parse_selftime, SUN_CLS, "parseClassTime.self"); 1285 NEWPERFTICKCOUNTER(_perf_sys_class_lookup_time, SUN_CLS, "lookupSysClassTime"); 1286 NEWPERFTICKCOUNTER(_perf_shared_classload_time, SUN_CLS, "sharedClassLoadTime"); 1287 NEWPERFTICKCOUNTER(_perf_sys_classload_time, SUN_CLS, "sysClassLoadTime"); 1288 NEWPERFTICKCOUNTER(_perf_app_classload_time, SUN_CLS, "appClassLoadTime"); 1289 NEWPERFTICKCOUNTER(_perf_app_classload_selftime, SUN_CLS, "appClassLoadTime.self"); 1290 NEWPERFEVENTCOUNTER(_perf_app_classload_count, SUN_CLS, "appClassLoadCount"); 1291 NEWPERFTICKCOUNTER(_perf_define_appclasses, SUN_CLS, "defineAppClasses"); 1292 NEWPERFTICKCOUNTER(_perf_define_appclass_time, SUN_CLS, "defineAppClassTime"); 1293 NEWPERFTICKCOUNTER(_perf_define_appclass_selftime, SUN_CLS, "defineAppClassTime.self"); 1294 NEWPERFBYTECOUNTER(_perf_app_classfile_bytes_read, SUN_CLS, "appClassBytes"); 1295 NEWPERFBYTECOUNTER(_perf_sys_classfile_bytes_read, SUN_CLS, "sysClassBytes"); 1296 1297 1298 // The following performance counters are added for measuring the impact 1299 // of the bug fix of 6365597. They are mainly focused on finding out 1300 // the behavior of system & user-defined classloader lock, whether 1301 // ClassLoader.loadClass/findClass is being called synchronized or not. 1302 // Also two additional counters are created to see whether 'UnsyncloadClass' 1303 // flag is being set or not and how many times load_instance_class call 1304 // fails with linkageError etc. 1305 NEWPERFEVENTCOUNTER(_sync_systemLoaderLockContentionRate, SUN_CLS, 1306 "systemLoaderLockContentionRate"); 1307 NEWPERFEVENTCOUNTER(_sync_nonSystemLoaderLockContentionRate, SUN_CLS, 1308 "nonSystemLoaderLockContentionRate"); 1309 NEWPERFEVENTCOUNTER(_sync_JVMFindLoadedClassLockFreeCounter, SUN_CLS, 1310 "jvmFindLoadedClassNoLockCalls"); 1311 NEWPERFEVENTCOUNTER(_sync_JVMDefineClassLockFreeCounter, SUN_CLS, 1312 "jvmDefineClassNoLockCalls"); 1313 1314 NEWPERFEVENTCOUNTER(_sync_JNIDefineClassLockFreeCounter, SUN_CLS, 1315 "jniDefineClassNoLockCalls"); 1316 1317 NEWPERFEVENTCOUNTER(_unsafe_defineClassCallCounter, SUN_CLS, 1318 "unsafeDefineClassCalls"); 1319 1320 NEWPERFEVENTCOUNTER(_isUnsyncloadClass, SUN_CLS, "isUnsyncloadClassSet"); 1321 NEWPERFEVENTCOUNTER(_load_instance_class_failCounter, SUN_CLS, 1322 "loadInstanceClassFailRate"); 1323 1324 // increment the isUnsyncloadClass counter if UnsyncloadClass is set. 1325 if (UnsyncloadClass) { 1326 _isUnsyncloadClass->inc(); 1327 } 1328 } 1329 1330 // lookup zip library entry points 1331 load_zip_library(); 1332 // lookup jimage library entry points 1333 load_jimage_library(); 1334 #if INCLUDE_CDS 1335 // initialize search path 1336 if (DumpSharedSpaces) { 1337 _shared_paths_misc_info = SharedClassUtil::allocate_shared_paths_misc_info(); 1338 } 1339 #endif 1340 setup_bootstrap_search_path(); 1341 } 1342 1343 #if INCLUDE_CDS 1344 void ClassLoader::initialize_shared_path() { 1345 if (DumpSharedSpaces) { 1346 ClassLoaderExt::setup_search_paths(); 1347 _shared_paths_misc_info->write_jint(0); // see comments in SharedPathsMiscInfo::check() 1348 } 1349 } 1350 #endif 1351 1352 jlong ClassLoader::classloader_time_ms() { 1353 return UsePerfData ? 1354 Management::ticks_to_ms(_perf_accumulated_time->get_value()) : -1; 1355 } 1356 1357 jlong ClassLoader::class_init_count() { 1358 return UsePerfData ? _perf_classes_inited->get_value() : -1; 1359 } 1360 1361 jlong ClassLoader::class_init_time_ms() { 1362 return UsePerfData ? 1363 Management::ticks_to_ms(_perf_class_init_time->get_value()) : -1; 1364 } 1365 1366 jlong ClassLoader::class_verify_time_ms() { 1367 return UsePerfData ? 1368 Management::ticks_to_ms(_perf_class_verify_time->get_value()) : -1; 1369 } 1370 1371 jlong ClassLoader::class_link_count() { 1372 return UsePerfData ? _perf_classes_linked->get_value() : -1; 1373 } 1374 1375 jlong ClassLoader::class_link_time_ms() { 1376 return UsePerfData ? 1377 Management::ticks_to_ms(_perf_class_link_time->get_value()) : -1; 1378 } 1379 1380 int ClassLoader::compute_Object_vtable() { 1381 // hardwired for JDK1.2 -- would need to duplicate class file parsing 1382 // code to determine actual value from file 1383 // Would be value '11' if finals were in vtable 1384 int JDK_1_2_Object_vtable_size = 5; 1385 return JDK_1_2_Object_vtable_size * vtableEntry::size(); 1386 } 1387 1388 1389 void classLoader_init() { 1390 ClassLoader::initialize(); 1391 } 1392 1393 1394 bool ClassLoader::get_canonical_path(const char* orig, char* out, int len) { 1395 assert(orig != NULL && out != NULL && len > 0, "bad arguments"); 1396 if (CanonicalizeEntry != NULL) { 1397 JavaThread* THREAD = JavaThread::current(); 1398 JNIEnv* env = THREAD->jni_environment(); 1399 ResourceMark rm(THREAD); 1400 1401 // os::native_path writes into orig_copy 1402 char* orig_copy = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, strlen(orig)+1); 1403 strcpy(orig_copy, orig); 1404 if ((CanonicalizeEntry)(env, os::native_path(orig_copy), out, len) < 0) { 1405 return false; 1406 } 1407 } else { 1408 // On JDK 1.2.2 the Canonicalize does not exist, so just do nothing 1409 strncpy(out, orig, len); 1410 out[len - 1] = '\0'; 1411 } 1412 return true; 1413 } 1414 1415 void ClassLoader::create_javabase() { 1416 Thread* THREAD = Thread::current(); 1417 1418 // Create java.base's module entry for the boot 1419 // class loader prior to loading j.l.Ojbect. 1420 ClassLoaderData* null_cld = ClassLoaderData::the_null_class_loader_data(); 1421 1422 // Get module entry table 1423 ModuleEntryTable* null_cld_modules = null_cld->modules(); 1424 if (null_cld_modules == NULL) { 1425 vm_exit_during_initialization("No ModuleEntryTable for the boot class loader"); 1426 } 1427 1428 { 1429 MutexLocker ml(Module_lock, THREAD); 1430 ModuleEntry* jb_module = null_cld_modules->locked_create_entry_or_null(Handle(NULL), vmSymbols::java_base(), NULL, NULL, null_cld); 1431 if (jb_module == NULL) { 1432 vm_exit_during_initialization("Unable to create ModuleEntry for java.base"); 1433 } 1434 ModuleEntryTable::set_javabase_module(jb_module); 1435 } 1436 1437 // When looking for the jimage file, only 1438 // search the boot loader's module path which 1439 // can consist of [-Xpatch]; exploded build | modules 1440 // Do not search the boot loader's append path. 1441 ClassPathEntry* e = _first_entry; 1442 ClassPathEntry* last_e = _first_append_entry; 1443 while ((e != NULL) && (e != last_e)) { 1444 JImageFile *jimage = e->jimage(); 1445 if (jimage != NULL && e->is_jrt()) { 1446 set_has_jimage(true); 1447 #if INCLUDE_CDS 1448 ClassLoader::initialize_module_loader_map(jimage); 1449 #endif 1450 return; 1451 } 1452 e = e->next(); 1453 } 1454 } 1455 1456 #ifndef PRODUCT 1457 1458 // CompileTheWorld 1459 // 1460 // Iterates over all class path entries and forces compilation of all methods 1461 // in all classes found. Currently, only zip/jar archives are searched. 1462 // 1463 // The classes are loaded by the Java level bootstrap class loader, and the 1464 // initializer is called. If DelayCompilationDuringStartup is true (default), 1465 // the interpreter will run the initialization code. Note that forcing 1466 // initialization in this way could potentially lead to initialization order 1467 // problems, in which case we could just force the initialization bit to be set. 1468 1469 1470 // We need to iterate over the contents of a zip/jar file, so we replicate the 1471 // jzcell and jzfile definitions from zip_util.h but rename jzfile to real_jzfile, 1472 // since jzfile already has a void* definition. 1473 // 1474 // Note that this is only used in debug mode. 1475 // 1476 // HotSpot integration note: 1477 // Matches zip_util.h 1.14 99/06/01 from jdk1.3 beta H build 1478 1479 1480 // JDK 1.3 version 1481 typedef struct real_jzentry { /* Zip file entry */ 1482 char *name; /* entry name */ 1483 jint time; /* modification time */ 1484 jint size; /* size of uncompressed data */ 1485 jint csize; /* size of compressed data (zero if uncompressed) */ 1486 jint crc; /* crc of uncompressed data */ 1487 char *comment; /* optional zip file comment */ 1488 jbyte *extra; /* optional extra data */ 1489 jint pos; /* position of LOC header (if negative) or data */ 1490 } real_jzentry; 1491 1492 typedef struct real_jzfile { /* Zip file */ 1493 char *name; /* zip file name */ 1494 jint refs; /* number of active references */ 1495 jint fd; /* open file descriptor */ 1496 void *lock; /* read lock */ 1497 char *comment; /* zip file comment */ 1498 char *msg; /* zip error message */ 1499 void *entries; /* array of hash cells */ 1500 jint total; /* total number of entries */ 1501 unsigned short *table; /* Hash chain heads: indexes into entries */ 1502 jint tablelen; /* number of hash eads */ 1503 real_jzfile *next; /* next zip file in search list */ 1504 jzentry *cache; /* we cache the most recently freed jzentry */ 1505 /* Information on metadata names in META-INF directory */ 1506 char **metanames; /* array of meta names (may have null names) */ 1507 jint metacount; /* number of slots in metanames array */ 1508 /* If there are any per-entry comments, they are in the comments array */ 1509 char **comments; 1510 } real_jzfile; 1511 1512 void ClassPathDirEntry::compile_the_world(Handle loader, TRAPS) { 1513 // For now we only compile all methods in all classes in zip/jar files 1514 tty->print_cr("CompileTheWorld : Skipped classes in %s", _dir); 1515 tty->cr(); 1516 } 1517 1518 void ClassPathZipEntry::compile_the_world(Handle loader, TRAPS) { 1519 real_jzfile* zip = (real_jzfile*) _zip; 1520 tty->print_cr("CompileTheWorld : Compiling all classes in %s", zip->name); 1521 tty->cr(); 1522 // Iterate over all entries in zip file 1523 for (int n = 0; ; n++) { 1524 real_jzentry * ze = (real_jzentry *)((*GetNextEntry)(_zip, n)); 1525 if (ze == NULL) break; 1526 ClassLoader::compile_the_world_in(ze->name, loader, CHECK); 1527 } 1528 if (HAS_PENDING_EXCEPTION) { 1529 if (PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())) { 1530 CLEAR_PENDING_EXCEPTION; 1531 tty->print_cr("\nCompileTheWorld : Ran out of memory\n"); 1532 tty->print_cr("Increase class metadata storage if a limit was set"); 1533 } else { 1534 tty->print_cr("\nCompileTheWorld : Unexpected exception occurred\n"); 1535 } 1536 } 1537 } 1538 1539 void ClassLoader::compile_the_world() { 1540 EXCEPTION_MARK; 1541 HandleMark hm(THREAD); 1542 ResourceMark rm(THREAD); 1543 1544 // Find bootstrap loader 1545 Handle system_class_loader (THREAD, SystemDictionary::java_system_loader()); 1546 // Iterate over all bootstrap class path entries 1547 ClassPathEntry* e = _first_entry; 1548 jlong start = os::javaTimeMillis(); 1549 while (e != NULL) { 1550 // We stop at "modules" jimage, unless it is the first bootstrap path entry 1551 if (e->is_jrt() && e != _first_entry) break; 1552 e->compile_the_world(system_class_loader, CATCH); 1553 e = e->next(); 1554 } 1555 jlong end = os::javaTimeMillis(); 1556 tty->print_cr("CompileTheWorld : Done (%d classes, %d methods, " JLONG_FORMAT " ms)", 1557 _compile_the_world_class_counter, _compile_the_world_method_counter, (end - start)); 1558 { 1559 // Print statistics as if before normal exit: 1560 extern void print_statistics(); 1561 print_statistics(); 1562 } 1563 vm_exit(0); 1564 } 1565 1566 int ClassLoader::_compile_the_world_class_counter = 0; 1567 int ClassLoader::_compile_the_world_method_counter = 0; 1568 static int _codecache_sweep_counter = 0; 1569 1570 // Filter out all exceptions except OOMs 1571 static void clear_pending_exception_if_not_oom(TRAPS) { 1572 if (HAS_PENDING_EXCEPTION && 1573 !PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())) { 1574 CLEAR_PENDING_EXCEPTION; 1575 } 1576 // The CHECK at the caller will propagate the exception out 1577 } 1578 1579 /** 1580 * Returns if the given method should be compiled when doing compile-the-world. 1581 * 1582 * TODO: This should be a private method in a CompileTheWorld class. 1583 */ 1584 static bool can_be_compiled(methodHandle m, int comp_level) { 1585 assert(CompileTheWorld, "must be"); 1586 1587 // It's not valid to compile a native wrapper for MethodHandle methods 1588 // that take a MemberName appendix since the bytecode signature is not 1589 // correct. 1590 vmIntrinsics::ID iid = m->intrinsic_id(); 1591 if (MethodHandles::is_signature_polymorphic(iid) && MethodHandles::has_member_arg(iid)) { 1592 return false; 1593 } 1594 1595 return CompilationPolicy::can_be_compiled(m, comp_level); 1596 } 1597 1598 void ClassLoader::compile_the_world_in(char* name, Handle loader, TRAPS) { 1599 if (string_ends_with(name, ".class")) { 1600 // We have a .class file 1601 int len = (int)strlen(name); 1602 char buffer[2048]; 1603 strncpy(buffer, name, len - 6); 1604 buffer[len-6] = 0; 1605 // If the file has a period after removing .class, it's not really a 1606 // valid class file. The class loader will check everything else. 1607 if (strchr(buffer, '.') == NULL) { 1608 _compile_the_world_class_counter++; 1609 if (_compile_the_world_class_counter > CompileTheWorldStopAt) return; 1610 1611 // Construct name without extension 1612 TempNewSymbol sym = SymbolTable::new_symbol(buffer, CHECK); 1613 // Use loader to load and initialize class 1614 Klass* ik = SystemDictionary::resolve_or_null(sym, loader, Handle(), THREAD); 1615 instanceKlassHandle k (THREAD, ik); 1616 if (k.not_null() && !HAS_PENDING_EXCEPTION) { 1617 k->initialize(THREAD); 1618 } 1619 bool exception_occurred = HAS_PENDING_EXCEPTION; 1620 clear_pending_exception_if_not_oom(CHECK); 1621 if (CompileTheWorldPreloadClasses && k.not_null()) { 1622 ConstantPool::preload_and_initialize_all_classes(k->constants(), THREAD); 1623 if (HAS_PENDING_EXCEPTION) { 1624 // If something went wrong in preloading we just ignore it 1625 clear_pending_exception_if_not_oom(CHECK); 1626 tty->print_cr("Preloading failed for (%d) %s", _compile_the_world_class_counter, buffer); 1627 } 1628 } 1629 1630 if (_compile_the_world_class_counter >= CompileTheWorldStartAt) { 1631 if (k.is_null() || exception_occurred) { 1632 // If something went wrong (e.g. ExceptionInInitializerError) we skip this class 1633 tty->print_cr("CompileTheWorld (%d) : Skipping %s", _compile_the_world_class_counter, buffer); 1634 } else { 1635 tty->print_cr("CompileTheWorld (%d) : %s", _compile_the_world_class_counter, buffer); 1636 // Preload all classes to get around uncommon traps 1637 // Iterate over all methods in class 1638 int comp_level = CompilationPolicy::policy()->initial_compile_level(); 1639 for (int n = 0; n < k->methods()->length(); n++) { 1640 methodHandle m (THREAD, k->methods()->at(n)); 1641 if (can_be_compiled(m, comp_level)) { 1642 if (++_codecache_sweep_counter == CompileTheWorldSafepointInterval) { 1643 // Give sweeper a chance to keep up with CTW 1644 VM_ForceSafepoint op; 1645 VMThread::execute(&op); 1646 _codecache_sweep_counter = 0; 1647 } 1648 // Force compilation 1649 CompileBroker::compile_method(m, InvocationEntryBci, comp_level, 1650 methodHandle(), 0, CompileTask::Reason_CTW, THREAD); 1651 if (HAS_PENDING_EXCEPTION) { 1652 clear_pending_exception_if_not_oom(CHECK); 1653 tty->print_cr("CompileTheWorld (%d) : Skipping method: %s", _compile_the_world_class_counter, m->name_and_sig_as_C_string()); 1654 } else { 1655 _compile_the_world_method_counter++; 1656 } 1657 if (TieredCompilation && TieredStopAtLevel >= CompLevel_full_optimization) { 1658 // Clobber the first compile and force second tier compilation 1659 CompiledMethod* nm = m->code(); 1660 if (nm != NULL && !m->is_method_handle_intrinsic()) { 1661 // Throw out the code so that the code cache doesn't fill up 1662 nm->make_not_entrant(); 1663 m->clear_code(); 1664 } 1665 CompileBroker::compile_method(m, InvocationEntryBci, CompLevel_full_optimization, 1666 methodHandle(), 0, CompileTask::Reason_CTW, THREAD); 1667 if (HAS_PENDING_EXCEPTION) { 1668 clear_pending_exception_if_not_oom(CHECK); 1669 tty->print_cr("CompileTheWorld (%d) : Skipping method: %s", _compile_the_world_class_counter, m->name_and_sig_as_C_string()); 1670 } else { 1671 _compile_the_world_method_counter++; 1672 } 1673 } 1674 } else { 1675 tty->print_cr("CompileTheWorld (%d) : Skipping method: %s", _compile_the_world_class_counter, m->name_and_sig_as_C_string()); 1676 } 1677 1678 CompiledMethod* nm = m->code(); 1679 if (nm != NULL && !m->is_method_handle_intrinsic()) { 1680 // Throw out the code so that the code cache doesn't fill up 1681 nm->make_not_entrant(); 1682 m->clear_code(); 1683 } 1684 } 1685 } 1686 } 1687 } 1688 } 1689 } 1690 1691 #endif //PRODUCT 1692 1693 // Please keep following two functions at end of this file. With them placed at top or in middle of the file, 1694 // they could get inlined by agressive compiler, an unknown trick, see bug 6966589. 1695 void PerfClassTraceTime::initialize() { 1696 if (!UsePerfData) return; 1697 1698 if (_eventp != NULL) { 1699 // increment the event counter 1700 _eventp->inc(); 1701 } 1702 1703 // stop the current active thread-local timer to measure inclusive time 1704 _prev_active_event = -1; 1705 for (int i=0; i < EVENT_TYPE_COUNT; i++) { 1706 if (_timers[i].is_active()) { 1707 assert(_prev_active_event == -1, "should have only one active timer"); 1708 _prev_active_event = i; 1709 _timers[i].stop(); 1710 } 1711 } 1712 1713 if (_recursion_counters == NULL || (_recursion_counters[_event_type])++ == 0) { 1714 // start the inclusive timer if not recursively called 1715 _t.start(); 1716 } 1717 1718 // start thread-local timer of the given event type 1719 if (!_timers[_event_type].is_active()) { 1720 _timers[_event_type].start(); 1721 } 1722 } 1723 1724 PerfClassTraceTime::~PerfClassTraceTime() { 1725 if (!UsePerfData) return; 1726 1727 // stop the thread-local timer as the event completes 1728 // and resume the thread-local timer of the event next on the stack 1729 _timers[_event_type].stop(); 1730 jlong selftime = _timers[_event_type].ticks(); 1731 1732 if (_prev_active_event >= 0) { 1733 _timers[_prev_active_event].start(); 1734 } 1735 1736 if (_recursion_counters != NULL && --(_recursion_counters[_event_type]) > 0) return; 1737 1738 // increment the counters only on the leaf call 1739 _t.stop(); 1740 _timep->inc(_t.ticks()); 1741 if (_selftimep != NULL) { 1742 _selftimep->inc(selftime); 1743 } 1744 // add all class loading related event selftime to the accumulated time counter 1745 ClassLoader::perf_accumulated_time()->inc(selftime); 1746 1747 // reset the timer 1748 _timers[_event_type].reset(); 1749 }