1 /* 2 * Copyright (c) 1997, 2011, 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/classFileParser.hpp" 27 #include "classfile/classFileStream.hpp" 28 #include "classfile/classLoader.hpp" 29 #include "classfile/javaClasses.hpp" 30 #include "classfile/systemDictionary.hpp" 31 #include "classfile/vmSymbols.hpp" 32 #include "compiler/compileBroker.hpp" 33 #include "gc_interface/collectedHeap.inline.hpp" 34 #include "interpreter/bytecodeStream.hpp" 35 #include "interpreter/oopMapCache.hpp" 36 #include "memory/allocation.inline.hpp" 37 #include "memory/generation.hpp" 38 #include "memory/oopFactory.hpp" 39 #include "memory/universe.inline.hpp" 40 #include "oops/constantPoolKlass.hpp" 41 #include "oops/instanceKlass.hpp" 42 #include "oops/instanceRefKlass.hpp" 43 #include "oops/oop.inline.hpp" 44 #include "oops/symbol.hpp" 45 #include "prims/jvm_misc.hpp" 46 #include "runtime/arguments.hpp" 47 #include "runtime/compilationPolicy.hpp" 48 #include "runtime/fprofiler.hpp" 49 #include "runtime/handles.hpp" 50 #include "runtime/handles.inline.hpp" 51 #include "runtime/init.hpp" 52 #include "runtime/interfaceSupport.hpp" 53 #include "runtime/java.hpp" 54 #include "runtime/javaCalls.hpp" 55 #include "runtime/threadCritical.hpp" 56 #include "runtime/timer.hpp" 57 #include "services/management.hpp" 58 #include "services/threadService.hpp" 59 #include "utilities/events.hpp" 60 #include "utilities/hashtable.hpp" 61 #include "utilities/hashtable.inline.hpp" 62 #ifdef TARGET_OS_FAMILY_linux 63 # include "os_linux.inline.hpp" 64 #endif 65 #ifdef TARGET_OS_FAMILY_solaris 66 # include "os_solaris.inline.hpp" 67 #endif 68 #ifdef TARGET_OS_FAMILY_windows 69 # include "os_windows.inline.hpp" 70 #endif 71 72 73 // Entry points in zip.dll for loading zip/jar file entries 74 75 typedef void * * (JNICALL *ZipOpen_t)(const char *name, char **pmsg); 76 typedef void (JNICALL *ZipClose_t)(jzfile *zip); 77 typedef jzentry* (JNICALL *FindEntry_t)(jzfile *zip, const char *name, jint *sizeP, jint *nameLen); 78 typedef jboolean (JNICALL *ReadEntry_t)(jzfile *zip, jzentry *entry, unsigned char *buf, char *namebuf); 79 typedef jboolean (JNICALL *ReadMappedEntry_t)(jzfile *zip, jzentry *entry, unsigned char **buf, char *namebuf); 80 typedef jzentry* (JNICALL *GetNextEntry_t)(jzfile *zip, jint n); 81 82 static ZipOpen_t ZipOpen = NULL; 83 static ZipClose_t ZipClose = NULL; 84 static FindEntry_t FindEntry = NULL; 85 static ReadEntry_t ReadEntry = NULL; 86 static ReadMappedEntry_t ReadMappedEntry = NULL; 87 static GetNextEntry_t GetNextEntry = NULL; 88 static canonicalize_fn_t CanonicalizeEntry = NULL; 89 90 // Globals 91 92 PerfCounter* ClassLoader::_perf_accumulated_time = NULL; 93 PerfCounter* ClassLoader::_perf_classes_inited = NULL; 94 PerfCounter* ClassLoader::_perf_class_init_time = NULL; 95 PerfCounter* ClassLoader::_perf_class_init_selftime = NULL; 96 PerfCounter* ClassLoader::_perf_classes_verified = NULL; 97 PerfCounter* ClassLoader::_perf_class_verify_time = NULL; 98 PerfCounter* ClassLoader::_perf_class_verify_selftime = NULL; 99 PerfCounter* ClassLoader::_perf_classes_linked = NULL; 100 PerfCounter* ClassLoader::_perf_class_link_time = NULL; 101 PerfCounter* ClassLoader::_perf_class_link_selftime = NULL; 102 PerfCounter* ClassLoader::_perf_class_parse_time = NULL; 103 PerfCounter* ClassLoader::_perf_class_parse_selftime = NULL; 104 PerfCounter* ClassLoader::_perf_sys_class_lookup_time = NULL; 105 PerfCounter* ClassLoader::_perf_shared_classload_time = NULL; 106 PerfCounter* ClassLoader::_perf_sys_classload_time = NULL; 107 PerfCounter* ClassLoader::_perf_app_classload_time = NULL; 108 PerfCounter* ClassLoader::_perf_app_classload_selftime = NULL; 109 PerfCounter* ClassLoader::_perf_app_classload_count = NULL; 110 PerfCounter* ClassLoader::_perf_define_appclasses = NULL; 111 PerfCounter* ClassLoader::_perf_define_appclass_time = NULL; 112 PerfCounter* ClassLoader::_perf_define_appclass_selftime = NULL; 113 PerfCounter* ClassLoader::_perf_app_classfile_bytes_read = NULL; 114 PerfCounter* ClassLoader::_perf_sys_classfile_bytes_read = NULL; 115 PerfCounter* ClassLoader::_sync_systemLoaderLockContentionRate = NULL; 116 PerfCounter* ClassLoader::_sync_nonSystemLoaderLockContentionRate = NULL; 117 PerfCounter* ClassLoader::_sync_JVMFindLoadedClassLockFreeCounter = NULL; 118 PerfCounter* ClassLoader::_sync_JVMDefineClassLockFreeCounter = NULL; 119 PerfCounter* ClassLoader::_sync_JNIDefineClassLockFreeCounter = NULL; 120 PerfCounter* ClassLoader::_unsafe_defineClassCallCounter = NULL; 121 PerfCounter* ClassLoader::_isUnsyncloadClass = NULL; 122 PerfCounter* ClassLoader::_load_instance_class_failCounter = NULL; 123 124 ClassPathEntry* ClassLoader::_first_entry = NULL; 125 ClassPathEntry* ClassLoader::_last_entry = NULL; 126 PackageHashtable* ClassLoader::_package_hash_table = NULL; 127 128 // helper routines 129 bool string_starts_with(const char* str, const char* str_to_find) { 130 size_t str_len = strlen(str); 131 size_t str_to_find_len = strlen(str_to_find); 132 if (str_to_find_len > str_len) { 133 return false; 134 } 135 return (strncmp(str, str_to_find, str_to_find_len) == 0); 136 } 137 138 bool string_ends_with(const char* str, const char* str_to_find) { 139 size_t str_len = strlen(str); 140 size_t str_to_find_len = strlen(str_to_find); 141 if (str_to_find_len > str_len) { 142 return false; 143 } 144 return (strncmp(str + (str_len - str_to_find_len), str_to_find, str_to_find_len) == 0); 145 } 146 147 148 MetaIndex::MetaIndex(char** meta_package_names, int num_meta_package_names) { 149 if (num_meta_package_names == 0) { 150 _meta_package_names = NULL; 151 _num_meta_package_names = 0; 152 } else { 153 _meta_package_names = NEW_C_HEAP_ARRAY(char*, num_meta_package_names); 154 _num_meta_package_names = num_meta_package_names; 155 memcpy(_meta_package_names, meta_package_names, num_meta_package_names * sizeof(char*)); 156 } 157 } 158 159 160 MetaIndex::~MetaIndex() { 161 FREE_C_HEAP_ARRAY(char*, _meta_package_names); 162 } 163 164 165 bool MetaIndex::may_contain(const char* class_name) { 166 if ( _num_meta_package_names == 0) { 167 return false; 168 } 169 size_t class_name_len = strlen(class_name); 170 for (int i = 0; i < _num_meta_package_names; i++) { 171 char* pkg = _meta_package_names[i]; 172 size_t pkg_len = strlen(pkg); 173 size_t min_len = MIN2(class_name_len, pkg_len); 174 if (!strncmp(class_name, pkg, min_len)) { 175 return true; 176 } 177 } 178 return false; 179 } 180 181 182 ClassPathEntry::ClassPathEntry() { 183 set_next(NULL); 184 } 185 186 187 bool ClassPathEntry::is_lazy() { 188 return false; 189 } 190 191 ClassPathDirEntry::ClassPathDirEntry(char* dir) : ClassPathEntry() { 192 _dir = NEW_C_HEAP_ARRAY(char, strlen(dir)+1); 193 strcpy(_dir, dir); 194 } 195 196 197 ClassFileStream* ClassPathDirEntry::open_stream(const char* name) { 198 // construct full path name 199 char path[JVM_MAXPATHLEN]; 200 if (jio_snprintf(path, sizeof(path), "%s%s%s", _dir, os::file_separator(), name) == -1) { 201 return NULL; 202 } 203 // check if file exists 204 struct stat st; 205 if (os::stat(path, &st) == 0) { 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 return new ClassFileStream(buffer, st.st_size, _dir); // Resource allocated 220 } 221 } 222 } 223 return NULL; 224 } 225 226 227 ClassPathZipEntry::ClassPathZipEntry(jzfile* zip, const char* zip_name) : ClassPathEntry() { 228 _zip = zip; 229 _zip_name = NEW_C_HEAP_ARRAY(char, strlen(zip_name)+1); 230 strcpy(_zip_name, zip_name); 231 } 232 233 ClassPathZipEntry::~ClassPathZipEntry() { 234 if (ZipClose != NULL) { 235 (*ZipClose)(_zip); 236 } 237 FREE_C_HEAP_ARRAY(char, _zip_name); 238 } 239 240 ClassFileStream* ClassPathZipEntry::open_stream(const char* name) { 241 // enable call to C land 242 JavaThread* thread = JavaThread::current(); 243 ThreadToNativeFromVM ttn(thread); 244 // check whether zip archive contains name 245 jint filesize, name_len; 246 jzentry* entry = (*FindEntry)(_zip, name, &filesize, &name_len); 247 if (entry == NULL) return NULL; 248 u1* buffer; 249 char name_buf[128]; 250 char* filename; 251 if (name_len < 128) { 252 filename = name_buf; 253 } else { 254 filename = NEW_RESOURCE_ARRAY(char, name_len + 1); 255 } 256 257 // file found, get pointer to class in mmaped jar file. 258 if (ReadMappedEntry == NULL || 259 !(*ReadMappedEntry)(_zip, entry, &buffer, filename)) { 260 // mmaped access not available, perhaps due to compression, 261 // read contents into resource array 262 buffer = NEW_RESOURCE_ARRAY(u1, filesize); 263 if (!(*ReadEntry)(_zip, entry, buffer, filename)) return NULL; 264 } 265 if (UsePerfData) { 266 ClassLoader::perf_sys_classfile_bytes_read()->inc(filesize); 267 } 268 // return result 269 return new ClassFileStream(buffer, filesize, _zip_name); // Resource allocated 270 } 271 272 // invoke function for each entry in the zip file 273 void ClassPathZipEntry::contents_do(void f(const char* name, void* context), void* context) { 274 JavaThread* thread = JavaThread::current(); 275 HandleMark handle_mark(thread); 276 ThreadToNativeFromVM ttn(thread); 277 for (int n = 0; ; n++) { 278 jzentry * ze = ((*GetNextEntry)(_zip, n)); 279 if (ze == NULL) break; 280 (*f)(ze->name, context); 281 } 282 } 283 284 LazyClassPathEntry::LazyClassPathEntry(char* path, struct stat st) : ClassPathEntry() { 285 _path = strdup(path); 286 _st = st; 287 _meta_index = NULL; 288 _resolved_entry = NULL; 289 } 290 291 bool LazyClassPathEntry::is_jar_file() { 292 return ((_st.st_mode & S_IFREG) == S_IFREG); 293 } 294 295 ClassPathEntry* LazyClassPathEntry::resolve_entry() { 296 if (_resolved_entry != NULL) { 297 return (ClassPathEntry*) _resolved_entry; 298 } 299 ClassPathEntry* new_entry = NULL; 300 ClassLoader::create_class_path_entry(_path, _st, &new_entry, false); 301 assert(new_entry != NULL, "earlier code should have caught this"); 302 { 303 ThreadCritical tc; 304 if (_resolved_entry == NULL) { 305 _resolved_entry = new_entry; 306 return new_entry; 307 } 308 } 309 assert(_resolved_entry != NULL, "bug in MT-safe resolution logic"); 310 delete new_entry; 311 return (ClassPathEntry*) _resolved_entry; 312 } 313 314 ClassFileStream* LazyClassPathEntry::open_stream(const char* name) { 315 if (_meta_index != NULL && 316 !_meta_index->may_contain(name)) { 317 return NULL; 318 } 319 return resolve_entry()->open_stream(name); 320 } 321 322 bool LazyClassPathEntry::is_lazy() { 323 return true; 324 } 325 326 static void print_meta_index(LazyClassPathEntry* entry, 327 GrowableArray<char*>& meta_packages) { 328 tty->print("[Meta index for %s=", entry->name()); 329 for (int i = 0; i < meta_packages.length(); i++) { 330 if (i > 0) tty->print(" "); 331 tty->print(meta_packages.at(i)); 332 } 333 tty->print_cr("]"); 334 } 335 336 337 void ClassLoader::setup_meta_index() { 338 // Set up meta index which allows us to open boot jars lazily if 339 // class data sharing is enabled 340 const char* known_version = "% VERSION 2"; 341 char* meta_index_path = Arguments::get_meta_index_path(); 342 char* meta_index_dir = Arguments::get_meta_index_dir(); 343 FILE* file = fopen(meta_index_path, "r"); 344 int line_no = 0; 345 if (file != NULL) { 346 ResourceMark rm; 347 LazyClassPathEntry* cur_entry = NULL; 348 GrowableArray<char*> boot_class_path_packages(10); 349 char package_name[256]; 350 bool skipCurrentJar = false; 351 while (fgets(package_name, sizeof(package_name), file) != NULL) { 352 ++line_no; 353 // Remove trailing newline 354 package_name[strlen(package_name) - 1] = '\0'; 355 switch(package_name[0]) { 356 case '%': 357 { 358 if ((line_no == 1) && (strcmp(package_name, known_version) != 0)) { 359 if (TraceClassLoading && Verbose) { 360 tty->print("[Unsupported meta index version]"); 361 } 362 fclose(file); 363 return; 364 } 365 } 366 367 // These directives indicate jar files which contain only 368 // classes, only non-classfile resources, or a combination of 369 // the two. See src/share/classes/sun/misc/MetaIndex.java and 370 // make/tools/MetaIndex/BuildMetaIndex.java in the J2SE 371 // workspace. 372 case '#': 373 case '!': 374 case '@': 375 { 376 // Hand off current packages to current lazy entry (if any) 377 if ((cur_entry != NULL) && 378 (boot_class_path_packages.length() > 0)) { 379 if (TraceClassLoading && Verbose) { 380 print_meta_index(cur_entry, boot_class_path_packages); 381 } 382 MetaIndex* index = new MetaIndex(boot_class_path_packages.adr_at(0), 383 boot_class_path_packages.length()); 384 cur_entry->set_meta_index(index); 385 } 386 cur_entry = NULL; 387 boot_class_path_packages.clear(); 388 389 // Find lazy entry corresponding to this jar file 390 for (ClassPathEntry* entry = _first_entry; entry != NULL; entry = entry->next()) { 391 if (entry->is_lazy() && 392 string_starts_with(entry->name(), meta_index_dir) && 393 string_ends_with(entry->name(), &package_name[2])) { 394 cur_entry = (LazyClassPathEntry*) entry; 395 break; 396 } 397 } 398 399 // If the first character is '@', it indicates the following jar 400 // file is a resource only jar file in which case, we should skip 401 // reading the subsequent entries since the resource loading is 402 // totally handled by J2SE side. 403 if (package_name[0] == '@') { 404 if (cur_entry != NULL) { 405 cur_entry->set_meta_index(new MetaIndex(NULL, 0)); 406 } 407 cur_entry = NULL; 408 skipCurrentJar = true; 409 } else { 410 skipCurrentJar = false; 411 } 412 413 break; 414 } 415 416 default: 417 { 418 if (!skipCurrentJar && cur_entry != NULL) { 419 char* new_name = strdup(package_name); 420 boot_class_path_packages.append(new_name); 421 } 422 } 423 } 424 } 425 // Hand off current packages to current lazy entry (if any) 426 if ((cur_entry != NULL) && 427 (boot_class_path_packages.length() > 0)) { 428 if (TraceClassLoading && Verbose) { 429 print_meta_index(cur_entry, boot_class_path_packages); 430 } 431 MetaIndex* index = new MetaIndex(boot_class_path_packages.adr_at(0), 432 boot_class_path_packages.length()); 433 cur_entry->set_meta_index(index); 434 } 435 fclose(file); 436 } 437 } 438 439 void ClassLoader::setup_bootstrap_search_path() { 440 assert(_first_entry == NULL, "should not setup bootstrap class search path twice"); 441 char* sys_class_path = os::strdup(Arguments::get_sysclasspath()); 442 if (TraceClassLoading && Verbose) { 443 tty->print_cr("[Bootstrap loader class path=%s]", sys_class_path); 444 } 445 446 int len = (int)strlen(sys_class_path); 447 int end = 0; 448 449 // Iterate over class path entries 450 for (int start = 0; start < len; start = end) { 451 while (sys_class_path[end] && sys_class_path[end] != os::path_separator()[0]) { 452 end++; 453 } 454 char* path = NEW_C_HEAP_ARRAY(char, end-start+1); 455 strncpy(path, &sys_class_path[start], end-start); 456 path[end-start] = '\0'; 457 update_class_path_entry_list(path, false); 458 FREE_C_HEAP_ARRAY(char, path); 459 while (sys_class_path[end] == os::path_separator()[0]) { 460 end++; 461 } 462 } 463 } 464 465 void ClassLoader::create_class_path_entry(char *path, struct stat st, ClassPathEntry **new_entry, bool lazy) { 466 JavaThread* thread = JavaThread::current(); 467 if (lazy) { 468 *new_entry = new LazyClassPathEntry(path, st); 469 return; 470 } 471 if ((st.st_mode & S_IFREG) == S_IFREG) { 472 // Regular file, should be a zip file 473 // Canonicalized filename 474 char canonical_path[JVM_MAXPATHLEN]; 475 if (!get_canonical_path(path, canonical_path, JVM_MAXPATHLEN)) { 476 // This matches the classic VM 477 EXCEPTION_MARK; 478 THROW_MSG(vmSymbols::java_io_IOException(), "Bad pathname"); 479 } 480 char* error_msg = NULL; 481 jzfile* zip; 482 { 483 // enable call to C land 484 ThreadToNativeFromVM ttn(thread); 485 HandleMark hm(thread); 486 zip = (*ZipOpen)(canonical_path, &error_msg); 487 } 488 if (zip != NULL && error_msg == NULL) { 489 *new_entry = new ClassPathZipEntry(zip, path); 490 if (TraceClassLoading) { 491 tty->print_cr("[Opened %s]", path); 492 } 493 } else { 494 ResourceMark rm(thread); 495 char *msg; 496 if (error_msg == NULL) { 497 msg = NEW_RESOURCE_ARRAY(char, strlen(path) + 128); ; 498 jio_snprintf(msg, strlen(path) + 127, "error in opening JAR file %s", path); 499 } else { 500 int len = (int)(strlen(path) + strlen(error_msg) + 128); 501 msg = NEW_RESOURCE_ARRAY(char, len); ; 502 jio_snprintf(msg, len - 1, "error in opening JAR file <%s> %s", error_msg, path); 503 } 504 EXCEPTION_MARK; 505 THROW_MSG(vmSymbols::java_lang_ClassNotFoundException(), msg); 506 } 507 } else { 508 // Directory 509 *new_entry = new ClassPathDirEntry(path); 510 if (TraceClassLoading) { 511 tty->print_cr("[Path %s]", path); 512 } 513 } 514 } 515 516 517 // Create a class path zip entry for a given path (return NULL if not found 518 // or zip/JAR file cannot be opened) 519 ClassPathZipEntry* ClassLoader::create_class_path_zip_entry(const char *path) { 520 // check for a regular file 521 struct stat st; 522 if (os::stat(path, &st) == 0) { 523 if ((st.st_mode & S_IFREG) == S_IFREG) { 524 char orig_path[JVM_MAXPATHLEN]; 525 char canonical_path[JVM_MAXPATHLEN]; 526 527 strcpy(orig_path, path); 528 if (get_canonical_path(orig_path, canonical_path, JVM_MAXPATHLEN)) { 529 char* error_msg = NULL; 530 jzfile* zip; 531 { 532 // enable call to C land 533 JavaThread* thread = JavaThread::current(); 534 ThreadToNativeFromVM ttn(thread); 535 HandleMark hm(thread); 536 zip = (*ZipOpen)(canonical_path, &error_msg); 537 } 538 if (zip != NULL && error_msg == NULL) { 539 // create using canonical path 540 return new ClassPathZipEntry(zip, canonical_path); 541 } 542 } 543 } 544 } 545 return NULL; 546 } 547 548 // returns true if entry already on class path 549 bool ClassLoader::contains_entry(ClassPathEntry *entry) { 550 ClassPathEntry* e = _first_entry; 551 while (e != NULL) { 552 // assume zip entries have been canonicalized 553 if (strcmp(entry->name(), e->name()) == 0) { 554 return true; 555 } 556 e = e->next(); 557 } 558 return false; 559 } 560 561 void ClassLoader::add_to_list(ClassPathEntry *new_entry) { 562 if (new_entry != NULL) { 563 if (_last_entry == NULL) { 564 _first_entry = _last_entry = new_entry; 565 } else { 566 _last_entry->set_next(new_entry); 567 _last_entry = new_entry; 568 } 569 } 570 } 571 572 void ClassLoader::update_class_path_entry_list(const char *path, 573 bool check_for_duplicates) { 574 struct stat st; 575 if (os::stat((char *)path, &st) == 0) { 576 // File or directory found 577 ClassPathEntry* new_entry = NULL; 578 create_class_path_entry((char *)path, st, &new_entry, LazyBootClassLoader); 579 // The kernel VM adds dynamically to the end of the classloader path and 580 // doesn't reorder the bootclasspath which would break java.lang.Package 581 // (see PackageInfo). 582 // Add new entry to linked list 583 if (!check_for_duplicates || !contains_entry(new_entry)) { 584 add_to_list(new_entry); 585 } 586 } 587 } 588 589 void ClassLoader::print_bootclasspath() { 590 ClassPathEntry* e = _first_entry; 591 tty->print("[bootclasspath= "); 592 while (e != NULL) { 593 tty->print("%s ;", e->name()); 594 e = e->next(); 595 } 596 tty->print_cr("]"); 597 } 598 599 void ClassLoader::load_zip_library() { 600 assert(ZipOpen == NULL, "should not load zip library twice"); 601 // First make sure native library is loaded 602 os::native_java_library(); 603 // Load zip library 604 char path[JVM_MAXPATHLEN]; 605 char ebuf[1024]; 606 os::dll_build_name(path, sizeof(path), Arguments::get_dll_dir(), "zip"); 607 void* handle = os::dll_load(path, ebuf, sizeof ebuf); 608 if (handle == NULL) { 609 vm_exit_during_initialization("Unable to load ZIP library", path); 610 } 611 // Lookup zip entry points 612 ZipOpen = CAST_TO_FN_PTR(ZipOpen_t, os::dll_lookup(handle, "ZIP_Open")); 613 ZipClose = CAST_TO_FN_PTR(ZipClose_t, os::dll_lookup(handle, "ZIP_Close")); 614 FindEntry = CAST_TO_FN_PTR(FindEntry_t, os::dll_lookup(handle, "ZIP_FindEntry")); 615 ReadEntry = CAST_TO_FN_PTR(ReadEntry_t, os::dll_lookup(handle, "ZIP_ReadEntry")); 616 ReadMappedEntry = CAST_TO_FN_PTR(ReadMappedEntry_t, os::dll_lookup(handle, "ZIP_ReadMappedEntry")); 617 GetNextEntry = CAST_TO_FN_PTR(GetNextEntry_t, os::dll_lookup(handle, "ZIP_GetNextEntry")); 618 619 // ZIP_Close is not exported on Windows in JDK5.0 so don't abort if ZIP_Close is NULL 620 if (ZipOpen == NULL || FindEntry == NULL || ReadEntry == NULL || GetNextEntry == NULL) { 621 vm_exit_during_initialization("Corrupted ZIP library", path); 622 } 623 624 // Lookup canonicalize entry in libjava.dll 625 void *javalib_handle = os::native_java_library(); 626 CanonicalizeEntry = CAST_TO_FN_PTR(canonicalize_fn_t, os::dll_lookup(javalib_handle, "Canonicalize")); 627 // This lookup only works on 1.3. Do not check for non-null here 628 } 629 630 // PackageInfo data exists in order to support the java.lang.Package 631 // class. A Package object provides information about a java package 632 // (version, vendor, etc.) which originates in the manifest of the jar 633 // file supplying the package. For application classes, the ClassLoader 634 // object takes care of this. 635 636 // For system (boot) classes, the Java code in the Package class needs 637 // to be able to identify which source jar file contained the boot 638 // class, so that it can extract the manifest from it. This table 639 // identifies java packages with jar files in the boot classpath. 640 641 // Because the boot classpath cannot change, the classpath index is 642 // sufficient to identify the source jar file or directory. (Since 643 // directories have no manifests, the directory name is not required, 644 // but is available.) 645 646 // When using sharing -- the pathnames of entries in the boot classpath 647 // may not be the same at runtime as they were when the archive was 648 // created (NFS, Samba, etc.). The actual files and directories named 649 // in the classpath must be the same files, in the same order, even 650 // though the exact name is not the same. 651 652 class PackageInfo: public BasicHashtableEntry { 653 public: 654 const char* _pkgname; // Package name 655 int _classpath_index; // Index of directory or JAR file loaded from 656 657 PackageInfo* next() { 658 return (PackageInfo*)BasicHashtableEntry::next(); 659 } 660 661 const char* pkgname() { return _pkgname; } 662 void set_pkgname(char* pkgname) { _pkgname = pkgname; } 663 664 const char* filename() { 665 return ClassLoader::classpath_entry(_classpath_index)->name(); 666 } 667 668 void set_index(int index) { 669 _classpath_index = index; 670 } 671 }; 672 673 674 class PackageHashtable : public BasicHashtable { 675 private: 676 inline unsigned int compute_hash(const char *s, int n) { 677 unsigned int val = 0; 678 while (--n >= 0) { 679 val = *s++ + 31 * val; 680 } 681 return val; 682 } 683 684 PackageInfo* bucket(int index) { 685 return (PackageInfo*)BasicHashtable::bucket(index); 686 } 687 688 PackageInfo* get_entry(int index, unsigned int hash, 689 const char* pkgname, size_t n) { 690 for (PackageInfo* pp = bucket(index); pp != NULL; pp = pp->next()) { 691 if (pp->hash() == hash && 692 strncmp(pkgname, pp->pkgname(), n) == 0 && 693 pp->pkgname()[n] == '\0') { 694 return pp; 695 } 696 } 697 return NULL; 698 } 699 700 public: 701 PackageHashtable(int table_size) 702 : BasicHashtable(table_size, sizeof(PackageInfo)) {} 703 704 PackageHashtable(int table_size, HashtableBucket* t, int number_of_entries) 705 : BasicHashtable(table_size, sizeof(PackageInfo), t, number_of_entries) {} 706 707 PackageInfo* get_entry(const char* pkgname, int n) { 708 unsigned int hash = compute_hash(pkgname, n); 709 return get_entry(hash_to_index(hash), hash, pkgname, n); 710 } 711 712 PackageInfo* new_entry(char* pkgname, int n) { 713 unsigned int hash = compute_hash(pkgname, n); 714 PackageInfo* pp; 715 pp = (PackageInfo*)BasicHashtable::new_entry(hash); 716 pp->set_pkgname(pkgname); 717 return pp; 718 } 719 720 void add_entry(PackageInfo* pp) { 721 int index = hash_to_index(pp->hash()); 722 BasicHashtable::add_entry(index, pp); 723 } 724 725 void copy_pkgnames(const char** packages) { 726 int n = 0; 727 for (int i = 0; i < table_size(); ++i) { 728 for (PackageInfo* pp = bucket(i); pp != NULL; pp = pp->next()) { 729 packages[n++] = pp->pkgname(); 730 } 731 } 732 assert(n == number_of_entries(), "just checking"); 733 } 734 735 void copy_table(char** top, char* end, PackageHashtable* table); 736 }; 737 738 739 void PackageHashtable::copy_table(char** top, char* end, 740 PackageHashtable* table) { 741 // Copy (relocate) the table to the shared space. 742 BasicHashtable::copy_table(top, end); 743 744 // Calculate the space needed for the package name strings. 745 int i; 746 int n = 0; 747 for (i = 0; i < table_size(); ++i) { 748 for (PackageInfo* pp = table->bucket(i); 749 pp != NULL; 750 pp = pp->next()) { 751 n += (int)(strlen(pp->pkgname()) + 1); 752 } 753 } 754 if (*top + n + sizeof(intptr_t) >= end) { 755 report_out_of_shared_space(SharedMiscData); 756 } 757 758 // Copy the table data (the strings) to the shared space. 759 n = align_size_up(n, sizeof(HeapWord)); 760 *(intptr_t*)(*top) = n; 761 *top += sizeof(intptr_t); 762 763 for (i = 0; i < table_size(); ++i) { 764 for (PackageInfo* pp = table->bucket(i); 765 pp != NULL; 766 pp = pp->next()) { 767 int n1 = (int)(strlen(pp->pkgname()) + 1); 768 pp->set_pkgname((char*)memcpy(*top, pp->pkgname(), n1)); 769 *top += n1; 770 } 771 } 772 *top = (char*)align_size_up((intptr_t)*top, sizeof(HeapWord)); 773 } 774 775 776 void ClassLoader::copy_package_info_buckets(char** top, char* end) { 777 _package_hash_table->copy_buckets(top, end); 778 } 779 780 void ClassLoader::copy_package_info_table(char** top, char* end) { 781 _package_hash_table->copy_table(top, end, _package_hash_table); 782 } 783 784 785 PackageInfo* ClassLoader::lookup_package(const char *pkgname) { 786 const char *cp = strrchr(pkgname, '/'); 787 if (cp != NULL) { 788 // Package prefix found 789 int n = cp - pkgname + 1; 790 return _package_hash_table->get_entry(pkgname, n); 791 } 792 return NULL; 793 } 794 795 796 bool ClassLoader::add_package(const char *pkgname, int classpath_index, TRAPS) { 797 assert(pkgname != NULL, "just checking"); 798 // Bootstrap loader no longer holds system loader lock obj serializing 799 // load_instance_class and thereby add_package 800 { 801 MutexLocker ml(PackageTable_lock, THREAD); 802 // First check for previously loaded entry 803 PackageInfo* pp = lookup_package(pkgname); 804 if (pp != NULL) { 805 // Existing entry found, check source of package 806 pp->set_index(classpath_index); 807 return true; 808 } 809 810 const char *cp = strrchr(pkgname, '/'); 811 if (cp != NULL) { 812 // Package prefix found 813 int n = cp - pkgname + 1; 814 815 char* new_pkgname = NEW_C_HEAP_ARRAY(char, n + 1); 816 if (new_pkgname == NULL) { 817 return false; 818 } 819 820 memcpy(new_pkgname, pkgname, n); 821 new_pkgname[n] = '\0'; 822 pp = _package_hash_table->new_entry(new_pkgname, n); 823 pp->set_index(classpath_index); 824 825 // Insert into hash table 826 _package_hash_table->add_entry(pp); 827 } 828 return true; 829 } 830 } 831 832 833 oop ClassLoader::get_system_package(const char* name, TRAPS) { 834 PackageInfo* pp; 835 { 836 MutexLocker ml(PackageTable_lock, THREAD); 837 pp = lookup_package(name); 838 } 839 if (pp == NULL) { 840 return NULL; 841 } else { 842 Handle p = java_lang_String::create_from_str(pp->filename(), THREAD); 843 return p(); 844 } 845 } 846 847 848 objArrayOop ClassLoader::get_system_packages(TRAPS) { 849 ResourceMark rm(THREAD); 850 int nof_entries; 851 const char** packages; 852 { 853 MutexLocker ml(PackageTable_lock, THREAD); 854 // Allocate resource char* array containing package names 855 nof_entries = _package_hash_table->number_of_entries(); 856 if ((packages = NEW_RESOURCE_ARRAY(const char*, nof_entries)) == NULL) { 857 return NULL; 858 } 859 _package_hash_table->copy_pkgnames(packages); 860 } 861 // Allocate objArray and fill with java.lang.String 862 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 863 nof_entries, CHECK_0); 864 objArrayHandle result(THREAD, r); 865 for (int i = 0; i < nof_entries; i++) { 866 Handle str = java_lang_String::create_from_str(packages[i], CHECK_0); 867 result->obj_at_put(i, str()); 868 } 869 870 return result(); 871 } 872 873 874 instanceKlassHandle ClassLoader::load_classfile(Symbol* h_name, TRAPS) { 875 ResourceMark rm(THREAD); 876 EventMark m("loading class " INTPTR_FORMAT, (address)h_name); 877 ThreadProfilerMark tpm(ThreadProfilerMark::classLoaderRegion); 878 879 stringStream st; 880 // st.print() uses too much stack space while handling a StackOverflowError 881 // st.print("%s.class", h_name->as_utf8()); 882 st.print_raw(h_name->as_utf8()); 883 st.print_raw(".class"); 884 char* name = st.as_string(); 885 886 // Lookup stream for parsing .class file 887 ClassFileStream* stream = NULL; 888 int classpath_index = 0; 889 { 890 PerfClassTraceTime vmtimer(perf_sys_class_lookup_time(), 891 ((JavaThread*) THREAD)->get_thread_stat()->perf_timers_addr(), 892 PerfClassTraceTime::CLASS_LOAD); 893 ClassPathEntry* e = _first_entry; 894 while (e != NULL) { 895 stream = e->open_stream(name); 896 if (stream != NULL) { 897 break; 898 } 899 e = e->next(); 900 ++classpath_index; 901 } 902 } 903 904 instanceKlassHandle h(THREAD, klassOop(NULL)); 905 if (stream != NULL) { 906 907 // class file found, parse it 908 ClassFileParser parser(stream); 909 Handle class_loader; 910 Handle protection_domain; 911 TempNewSymbol parsed_name = NULL; 912 instanceKlassHandle result = parser.parseClassFile(h_name, 913 class_loader, 914 protection_domain, 915 parsed_name, 916 false, 917 CHECK_(h)); 918 919 // add to package table 920 if (add_package(name, classpath_index, THREAD)) { 921 h = result; 922 } 923 } 924 925 return h; 926 } 927 928 929 void ClassLoader::create_package_info_table(HashtableBucket *t, int length, 930 int number_of_entries) { 931 assert(_package_hash_table == NULL, "One package info table allowed."); 932 assert(length == package_hash_table_size * sizeof(HashtableBucket), 933 "bad shared package info size."); 934 _package_hash_table = new PackageHashtable(package_hash_table_size, t, 935 number_of_entries); 936 } 937 938 939 void ClassLoader::create_package_info_table() { 940 assert(_package_hash_table == NULL, "shouldn't have one yet"); 941 _package_hash_table = new PackageHashtable(package_hash_table_size); 942 } 943 944 945 // Initialize the class loader's access to methods in libzip. Parse and 946 // process the boot classpath into a list ClassPathEntry objects. Once 947 // this list has been created, it must not change order (see class PackageInfo) 948 // it can be appended to and is by jvmti and the kernel vm. 949 950 void ClassLoader::initialize() { 951 assert(_package_hash_table == NULL, "should have been initialized by now."); 952 EXCEPTION_MARK; 953 954 if (UsePerfData) { 955 // jvmstat performance counters 956 NEWPERFTICKCOUNTER(_perf_accumulated_time, SUN_CLS, "time"); 957 NEWPERFTICKCOUNTER(_perf_class_init_time, SUN_CLS, "classInitTime"); 958 NEWPERFTICKCOUNTER(_perf_class_init_selftime, SUN_CLS, "classInitTime.self"); 959 NEWPERFTICKCOUNTER(_perf_class_verify_time, SUN_CLS, "classVerifyTime"); 960 NEWPERFTICKCOUNTER(_perf_class_verify_selftime, SUN_CLS, "classVerifyTime.self"); 961 NEWPERFTICKCOUNTER(_perf_class_link_time, SUN_CLS, "classLinkedTime"); 962 NEWPERFTICKCOUNTER(_perf_class_link_selftime, SUN_CLS, "classLinkedTime.self"); 963 NEWPERFEVENTCOUNTER(_perf_classes_inited, SUN_CLS, "initializedClasses"); 964 NEWPERFEVENTCOUNTER(_perf_classes_linked, SUN_CLS, "linkedClasses"); 965 NEWPERFEVENTCOUNTER(_perf_classes_verified, SUN_CLS, "verifiedClasses"); 966 967 NEWPERFTICKCOUNTER(_perf_class_parse_time, SUN_CLS, "parseClassTime"); 968 NEWPERFTICKCOUNTER(_perf_class_parse_selftime, SUN_CLS, "parseClassTime.self"); 969 NEWPERFTICKCOUNTER(_perf_sys_class_lookup_time, SUN_CLS, "lookupSysClassTime"); 970 NEWPERFTICKCOUNTER(_perf_shared_classload_time, SUN_CLS, "sharedClassLoadTime"); 971 NEWPERFTICKCOUNTER(_perf_sys_classload_time, SUN_CLS, "sysClassLoadTime"); 972 NEWPERFTICKCOUNTER(_perf_app_classload_time, SUN_CLS, "appClassLoadTime"); 973 NEWPERFTICKCOUNTER(_perf_app_classload_selftime, SUN_CLS, "appClassLoadTime.self"); 974 NEWPERFEVENTCOUNTER(_perf_app_classload_count, SUN_CLS, "appClassLoadCount"); 975 NEWPERFTICKCOUNTER(_perf_define_appclasses, SUN_CLS, "defineAppClasses"); 976 NEWPERFTICKCOUNTER(_perf_define_appclass_time, SUN_CLS, "defineAppClassTime"); 977 NEWPERFTICKCOUNTER(_perf_define_appclass_selftime, SUN_CLS, "defineAppClassTime.self"); 978 NEWPERFBYTECOUNTER(_perf_app_classfile_bytes_read, SUN_CLS, "appClassBytes"); 979 NEWPERFBYTECOUNTER(_perf_sys_classfile_bytes_read, SUN_CLS, "sysClassBytes"); 980 981 982 // The following performance counters are added for measuring the impact 983 // of the bug fix of 6365597. They are mainly focused on finding out 984 // the behavior of system & user-defined classloader lock, whether 985 // ClassLoader.loadClass/findClass is being called synchronized or not. 986 // Also two additional counters are created to see whether 'UnsyncloadClass' 987 // flag is being set or not and how many times load_instance_class call 988 // fails with linkageError etc. 989 NEWPERFEVENTCOUNTER(_sync_systemLoaderLockContentionRate, SUN_CLS, 990 "systemLoaderLockContentionRate"); 991 NEWPERFEVENTCOUNTER(_sync_nonSystemLoaderLockContentionRate, SUN_CLS, 992 "nonSystemLoaderLockContentionRate"); 993 NEWPERFEVENTCOUNTER(_sync_JVMFindLoadedClassLockFreeCounter, SUN_CLS, 994 "jvmFindLoadedClassNoLockCalls"); 995 NEWPERFEVENTCOUNTER(_sync_JVMDefineClassLockFreeCounter, SUN_CLS, 996 "jvmDefineClassNoLockCalls"); 997 998 NEWPERFEVENTCOUNTER(_sync_JNIDefineClassLockFreeCounter, SUN_CLS, 999 "jniDefineClassNoLockCalls"); 1000 1001 NEWPERFEVENTCOUNTER(_unsafe_defineClassCallCounter, SUN_CLS, 1002 "unsafeDefineClassCalls"); 1003 1004 NEWPERFEVENTCOUNTER(_isUnsyncloadClass, SUN_CLS, "isUnsyncloadClassSet"); 1005 NEWPERFEVENTCOUNTER(_load_instance_class_failCounter, SUN_CLS, 1006 "loadInstanceClassFailRate"); 1007 1008 // increment the isUnsyncloadClass counter if UnsyncloadClass is set. 1009 if (UnsyncloadClass) { 1010 _isUnsyncloadClass->inc(); 1011 } 1012 } 1013 1014 // lookup zip library entry points 1015 load_zip_library(); 1016 // initialize search path 1017 setup_bootstrap_search_path(); 1018 if (LazyBootClassLoader) { 1019 // set up meta index which makes boot classpath initialization lazier 1020 setup_meta_index(); 1021 } 1022 } 1023 1024 1025 jlong ClassLoader::classloader_time_ms() { 1026 return UsePerfData ? 1027 Management::ticks_to_ms(_perf_accumulated_time->get_value()) : -1; 1028 } 1029 1030 jlong ClassLoader::class_init_count() { 1031 return UsePerfData ? _perf_classes_inited->get_value() : -1; 1032 } 1033 1034 jlong ClassLoader::class_init_time_ms() { 1035 return UsePerfData ? 1036 Management::ticks_to_ms(_perf_class_init_time->get_value()) : -1; 1037 } 1038 1039 jlong ClassLoader::class_verify_time_ms() { 1040 return UsePerfData ? 1041 Management::ticks_to_ms(_perf_class_verify_time->get_value()) : -1; 1042 } 1043 1044 jlong ClassLoader::class_link_count() { 1045 return UsePerfData ? _perf_classes_linked->get_value() : -1; 1046 } 1047 1048 jlong ClassLoader::class_link_time_ms() { 1049 return UsePerfData ? 1050 Management::ticks_to_ms(_perf_class_link_time->get_value()) : -1; 1051 } 1052 1053 int ClassLoader::compute_Object_vtable() { 1054 // hardwired for JDK1.2 -- would need to duplicate class file parsing 1055 // code to determine actual value from file 1056 // Would be value '11' if finals were in vtable 1057 int JDK_1_2_Object_vtable_size = 5; 1058 return JDK_1_2_Object_vtable_size * vtableEntry::size(); 1059 } 1060 1061 1062 void classLoader_init() { 1063 ClassLoader::initialize(); 1064 } 1065 1066 1067 bool ClassLoader::get_canonical_path(char* orig, char* out, int len) { 1068 assert(orig != NULL && out != NULL && len > 0, "bad arguments"); 1069 if (CanonicalizeEntry != NULL) { 1070 JNIEnv* env = JavaThread::current()->jni_environment(); 1071 if ((CanonicalizeEntry)(env, os::native_path(orig), out, len) < 0) { 1072 return false; 1073 } 1074 } else { 1075 // On JDK 1.2.2 the Canonicalize does not exist, so just do nothing 1076 strncpy(out, orig, len); 1077 out[len - 1] = '\0'; 1078 } 1079 return true; 1080 } 1081 1082 #ifndef PRODUCT 1083 1084 void ClassLoader::verify() { 1085 _package_hash_table->verify(); 1086 } 1087 1088 1089 // CompileTheWorld 1090 // 1091 // Iterates over all class path entries and forces compilation of all methods 1092 // in all classes found. Currently, only zip/jar archives are searched. 1093 // 1094 // The classes are loaded by the Java level bootstrap class loader, and the 1095 // initializer is called. If DelayCompilationDuringStartup is true (default), 1096 // the interpreter will run the initialization code. Note that forcing 1097 // initialization in this way could potentially lead to initialization order 1098 // problems, in which case we could just force the initialization bit to be set. 1099 1100 1101 // We need to iterate over the contents of a zip/jar file, so we replicate the 1102 // jzcell and jzfile definitions from zip_util.h but rename jzfile to real_jzfile, 1103 // since jzfile already has a void* definition. 1104 // 1105 // Note that this is only used in debug mode. 1106 // 1107 // HotSpot integration note: 1108 // Matches zip_util.h 1.14 99/06/01 from jdk1.3 beta H build 1109 1110 1111 // JDK 1.3 version 1112 typedef struct real_jzentry13 { /* Zip file entry */ 1113 char *name; /* entry name */ 1114 jint time; /* modification time */ 1115 jint size; /* size of uncompressed data */ 1116 jint csize; /* size of compressed data (zero if uncompressed) */ 1117 jint crc; /* crc of uncompressed data */ 1118 char *comment; /* optional zip file comment */ 1119 jbyte *extra; /* optional extra data */ 1120 jint pos; /* position of LOC header (if negative) or data */ 1121 } real_jzentry13; 1122 1123 typedef struct real_jzfile13 { /* Zip file */ 1124 char *name; /* zip file name */ 1125 jint refs; /* number of active references */ 1126 jint fd; /* open file descriptor */ 1127 void *lock; /* read lock */ 1128 char *comment; /* zip file comment */ 1129 char *msg; /* zip error message */ 1130 void *entries; /* array of hash cells */ 1131 jint total; /* total number of entries */ 1132 unsigned short *table; /* Hash chain heads: indexes into entries */ 1133 jint tablelen; /* number of hash eads */ 1134 real_jzfile13 *next; /* next zip file in search list */ 1135 jzentry *cache; /* we cache the most recently freed jzentry */ 1136 /* Information on metadata names in META-INF directory */ 1137 char **metanames; /* array of meta names (may have null names) */ 1138 jint metacount; /* number of slots in metanames array */ 1139 /* If there are any per-entry comments, they are in the comments array */ 1140 char **comments; 1141 } real_jzfile13; 1142 1143 // JDK 1.2 version 1144 typedef struct real_jzentry12 { /* Zip file entry */ 1145 char *name; /* entry name */ 1146 jint time; /* modification time */ 1147 jint size; /* size of uncompressed data */ 1148 jint csize; /* size of compressed data (zero if uncompressed) */ 1149 jint crc; /* crc of uncompressed data */ 1150 char *comment; /* optional zip file comment */ 1151 jbyte *extra; /* optional extra data */ 1152 jint pos; /* position of LOC header (if negative) or data */ 1153 struct real_jzentry12 *next; /* next entry in hash table */ 1154 } real_jzentry12; 1155 1156 typedef struct real_jzfile12 { /* Zip file */ 1157 char *name; /* zip file name */ 1158 jint refs; /* number of active references */ 1159 jint fd; /* open file descriptor */ 1160 void *lock; /* read lock */ 1161 char *comment; /* zip file comment */ 1162 char *msg; /* zip error message */ 1163 real_jzentry12 *entries; /* array of zip entries */ 1164 jint total; /* total number of entries */ 1165 real_jzentry12 **table; /* hash table of entries */ 1166 jint tablelen; /* number of buckets */ 1167 jzfile *next; /* next zip file in search list */ 1168 } real_jzfile12; 1169 1170 1171 void ClassPathDirEntry::compile_the_world(Handle loader, TRAPS) { 1172 // For now we only compile all methods in all classes in zip/jar files 1173 tty->print_cr("CompileTheWorld : Skipped classes in %s", _dir); 1174 tty->cr(); 1175 } 1176 1177 1178 bool ClassPathDirEntry::is_rt_jar() { 1179 return false; 1180 } 1181 1182 void ClassPathZipEntry::compile_the_world(Handle loader, TRAPS) { 1183 if (JDK_Version::is_jdk12x_version()) { 1184 compile_the_world12(loader, THREAD); 1185 } else { 1186 compile_the_world13(loader, THREAD); 1187 } 1188 if (HAS_PENDING_EXCEPTION) { 1189 if (PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())) { 1190 CLEAR_PENDING_EXCEPTION; 1191 tty->print_cr("\nCompileTheWorld : Ran out of memory\n"); 1192 size_t used = Universe::heap()->permanent_used(); 1193 size_t capacity = Universe::heap()->permanent_capacity(); 1194 tty->print_cr("Permanent generation used %dK of %dK", used/K, capacity/K); 1195 tty->print_cr("Increase size by setting e.g. -XX:MaxPermSize=%dK\n", capacity*2/K); 1196 } else { 1197 tty->print_cr("\nCompileTheWorld : Unexpected exception occurred\n"); 1198 } 1199 } 1200 } 1201 1202 // Version that works for JDK 1.3.x 1203 void ClassPathZipEntry::compile_the_world13(Handle loader, TRAPS) { 1204 real_jzfile13* zip = (real_jzfile13*) _zip; 1205 tty->print_cr("CompileTheWorld : Compiling all classes in %s", zip->name); 1206 tty->cr(); 1207 // Iterate over all entries in zip file 1208 for (int n = 0; ; n++) { 1209 real_jzentry13 * ze = (real_jzentry13 *)((*GetNextEntry)(_zip, n)); 1210 if (ze == NULL) break; 1211 ClassLoader::compile_the_world_in(ze->name, loader, CHECK); 1212 } 1213 } 1214 1215 1216 // Version that works for JDK 1.2.x 1217 void ClassPathZipEntry::compile_the_world12(Handle loader, TRAPS) { 1218 real_jzfile12* zip = (real_jzfile12*) _zip; 1219 tty->print_cr("CompileTheWorld : Compiling all classes in %s", zip->name); 1220 tty->cr(); 1221 // Iterate over all entries in zip file 1222 for (int n = 0; ; n++) { 1223 real_jzentry12 * ze = (real_jzentry12 *)((*GetNextEntry)(_zip, n)); 1224 if (ze == NULL) break; 1225 ClassLoader::compile_the_world_in(ze->name, loader, CHECK); 1226 } 1227 } 1228 1229 bool ClassPathZipEntry::is_rt_jar() { 1230 if (JDK_Version::is_jdk12x_version()) { 1231 return is_rt_jar12(); 1232 } else { 1233 return is_rt_jar13(); 1234 } 1235 } 1236 1237 // JDK 1.3 version 1238 bool ClassPathZipEntry::is_rt_jar13() { 1239 real_jzfile13* zip = (real_jzfile13*) _zip; 1240 int len = (int)strlen(zip->name); 1241 // Check whether zip name ends in "rt.jar" 1242 // This will match other archives named rt.jar as well, but this is 1243 // only used for debugging. 1244 return (len >= 6) && (strcasecmp(zip->name + len - 6, "rt.jar") == 0); 1245 } 1246 1247 // JDK 1.2 version 1248 bool ClassPathZipEntry::is_rt_jar12() { 1249 real_jzfile12* zip = (real_jzfile12*) _zip; 1250 int len = (int)strlen(zip->name); 1251 // Check whether zip name ends in "rt.jar" 1252 // This will match other archives named rt.jar as well, but this is 1253 // only used for debugging. 1254 return (len >= 6) && (strcasecmp(zip->name + len - 6, "rt.jar") == 0); 1255 } 1256 1257 void LazyClassPathEntry::compile_the_world(Handle loader, TRAPS) { 1258 resolve_entry()->compile_the_world(loader, CHECK); 1259 } 1260 1261 bool LazyClassPathEntry::is_rt_jar() { 1262 return resolve_entry()->is_rt_jar(); 1263 } 1264 1265 void ClassLoader::compile_the_world() { 1266 EXCEPTION_MARK; 1267 HandleMark hm(THREAD); 1268 ResourceMark rm(THREAD); 1269 // Make sure we don't run with background compilation 1270 BackgroundCompilation = false; 1271 // Find bootstrap loader 1272 Handle system_class_loader (THREAD, SystemDictionary::java_system_loader()); 1273 // Iterate over all bootstrap class path entries 1274 ClassPathEntry* e = _first_entry; 1275 while (e != NULL) { 1276 // We stop at rt.jar, unless it is the first bootstrap path entry 1277 if (e->is_rt_jar() && e != _first_entry) break; 1278 e->compile_the_world(system_class_loader, CATCH); 1279 e = e->next(); 1280 } 1281 tty->print_cr("CompileTheWorld : Done"); 1282 { 1283 // Print statistics as if before normal exit: 1284 extern void print_statistics(); 1285 print_statistics(); 1286 } 1287 vm_exit(0); 1288 } 1289 1290 int ClassLoader::_compile_the_world_counter = 0; 1291 static int _codecache_sweep_counter = 0; 1292 1293 // Filter out all exceptions except OOMs 1294 static void clear_pending_exception_if_not_oom(TRAPS) { 1295 if (HAS_PENDING_EXCEPTION && 1296 !PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())) { 1297 CLEAR_PENDING_EXCEPTION; 1298 } 1299 // The CHECK at the caller will propagate the exception out 1300 } 1301 1302 void ClassLoader::compile_the_world_in(char* name, Handle loader, TRAPS) { 1303 int len = (int)strlen(name); 1304 if (len > 6 && strcmp(".class", name + len - 6) == 0) { 1305 // We have a .class file 1306 char buffer[2048]; 1307 strncpy(buffer, name, len - 6); 1308 buffer[len-6] = 0; 1309 // If the file has a period after removing .class, it's not really a 1310 // valid class file. The class loader will check everything else. 1311 if (strchr(buffer, '.') == NULL) { 1312 _compile_the_world_counter++; 1313 if (_compile_the_world_counter > CompileTheWorldStopAt) return; 1314 1315 // Construct name without extension 1316 TempNewSymbol sym = SymbolTable::new_symbol(buffer, CHECK); 1317 // Use loader to load and initialize class 1318 klassOop ik = SystemDictionary::resolve_or_null(sym, loader, Handle(), THREAD); 1319 instanceKlassHandle k (THREAD, ik); 1320 if (k.not_null() && !HAS_PENDING_EXCEPTION) { 1321 k->initialize(THREAD); 1322 } 1323 bool exception_occurred = HAS_PENDING_EXCEPTION; 1324 clear_pending_exception_if_not_oom(CHECK); 1325 if (CompileTheWorldPreloadClasses && k.not_null()) { 1326 constantPoolKlass::preload_and_initialize_all_classes(k->constants(), THREAD); 1327 if (HAS_PENDING_EXCEPTION) { 1328 // If something went wrong in preloading we just ignore it 1329 clear_pending_exception_if_not_oom(CHECK); 1330 tty->print_cr("Preloading failed for (%d) %s", _compile_the_world_counter, buffer); 1331 } 1332 } 1333 1334 if (_compile_the_world_counter >= CompileTheWorldStartAt) { 1335 if (k.is_null() || exception_occurred) { 1336 // If something went wrong (e.g. ExceptionInInitializerError) we skip this class 1337 tty->print_cr("CompileTheWorld (%d) : Skipping %s", _compile_the_world_counter, buffer); 1338 } else { 1339 tty->print_cr("CompileTheWorld (%d) : %s", _compile_the_world_counter, buffer); 1340 // Preload all classes to get around uncommon traps 1341 // Iterate over all methods in class 1342 for (int n = 0; n < k->methods()->length(); n++) { 1343 methodHandle m (THREAD, methodOop(k->methods()->obj_at(n))); 1344 if (CompilationPolicy::can_be_compiled(m)) { 1345 1346 if (++_codecache_sweep_counter == CompileTheWorldSafepointInterval) { 1347 // Give sweeper a chance to keep up with CTW 1348 VM_ForceSafepoint op; 1349 VMThread::execute(&op); 1350 _codecache_sweep_counter = 0; 1351 } 1352 // Force compilation 1353 CompileBroker::compile_method(m, InvocationEntryBci, CompilationPolicy::policy()->initial_compile_level(), 1354 methodHandle(), 0, "CTW", THREAD); 1355 if (HAS_PENDING_EXCEPTION) { 1356 clear_pending_exception_if_not_oom(CHECK); 1357 tty->print_cr("CompileTheWorld (%d) : Skipping method: %s", _compile_the_world_counter, m->name()->as_C_string()); 1358 } 1359 if (TieredCompilation && TieredStopAtLevel >= CompLevel_full_optimization) { 1360 // Clobber the first compile and force second tier compilation 1361 nmethod* nm = m->code(); 1362 if (nm != NULL) { 1363 // Throw out the code so that the code cache doesn't fill up 1364 nm->make_not_entrant(); 1365 m->clear_code(); 1366 } 1367 CompileBroker::compile_method(m, InvocationEntryBci, CompLevel_full_optimization, 1368 methodHandle(), 0, "CTW", THREAD); 1369 if (HAS_PENDING_EXCEPTION) { 1370 clear_pending_exception_if_not_oom(CHECK); 1371 tty->print_cr("CompileTheWorld (%d) : Skipping method: %s", _compile_the_world_counter, m->name()->as_C_string()); 1372 } 1373 } 1374 } 1375 1376 nmethod* nm = m->code(); 1377 if (nm != NULL) { 1378 // Throw out the code so that the code cache doesn't fill up 1379 nm->make_not_entrant(); 1380 m->clear_code(); 1381 } 1382 } 1383 } 1384 } 1385 } 1386 } 1387 } 1388 1389 #endif //PRODUCT 1390 1391 // Please keep following two functions at end of this file. With them placed at top or in middle of the file, 1392 // they could get inlined by agressive compiler, an unknown trick, see bug 6966589. 1393 void PerfClassTraceTime::initialize() { 1394 if (!UsePerfData) return; 1395 1396 if (_eventp != NULL) { 1397 // increment the event counter 1398 _eventp->inc(); 1399 } 1400 1401 // stop the current active thread-local timer to measure inclusive time 1402 _prev_active_event = -1; 1403 for (int i=0; i < EVENT_TYPE_COUNT; i++) { 1404 if (_timers[i].is_active()) { 1405 assert(_prev_active_event == -1, "should have only one active timer"); 1406 _prev_active_event = i; 1407 _timers[i].stop(); 1408 } 1409 } 1410 1411 if (_recursion_counters == NULL || (_recursion_counters[_event_type])++ == 0) { 1412 // start the inclusive timer if not recursively called 1413 _t.start(); 1414 } 1415 1416 // start thread-local timer of the given event type 1417 if (!_timers[_event_type].is_active()) { 1418 _timers[_event_type].start(); 1419 } 1420 } 1421 1422 PerfClassTraceTime::~PerfClassTraceTime() { 1423 if (!UsePerfData) return; 1424 1425 // stop the thread-local timer as the event completes 1426 // and resume the thread-local timer of the event next on the stack 1427 _timers[_event_type].stop(); 1428 jlong selftime = _timers[_event_type].ticks(); 1429 1430 if (_prev_active_event >= 0) { 1431 _timers[_prev_active_event].start(); 1432 } 1433 1434 if (_recursion_counters != NULL && --(_recursion_counters[_event_type]) > 0) return; 1435 1436 // increment the counters only on the leaf call 1437 _t.stop(); 1438 _timep->inc(_t.ticks()); 1439 if (_selftimep != NULL) { 1440 _selftimep->inc(selftime); 1441 } 1442 // add all class loading related event selftime to the accumulated time counter 1443 ClassLoader::perf_accumulated_time()->inc(selftime); 1444 1445 // reset the timer 1446 _timers[_event_type].reset(); 1447 }