1 /* 2 * Copyright (c) 1997, 2010, 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/symbolOop.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/hpi.hpp" 52 #include "runtime/init.hpp" 53 #include "runtime/interfaceSupport.hpp" 54 #include "runtime/java.hpp" 55 #include "runtime/javaCalls.hpp" 56 #include "runtime/threadCritical.hpp" 57 #include "runtime/timer.hpp" 58 #include "services/management.hpp" 59 #include "services/threadService.hpp" 60 #include "utilities/events.hpp" 61 #include "utilities/hashtable.hpp" 62 #include "utilities/hashtable.inline.hpp" 63 #ifdef TARGET_OS_FAMILY_linux 64 # include "hpi_linux.hpp" 65 # include "os_linux.inline.hpp" 66 #endif 67 #ifdef TARGET_OS_FAMILY_solaris 68 # include "hpi_solaris.hpp" 69 # include "os_solaris.inline.hpp" 70 #endif 71 #ifdef TARGET_OS_FAMILY_windows 72 # include "hpi_windows.hpp" 73 # include "os_windows.inline.hpp" 74 #endif 75 76 77 // Entry points in zip.dll for loading zip/jar file entries 78 79 typedef void * * (JNICALL *ZipOpen_t)(const char *name, char **pmsg); 80 typedef void (JNICALL *ZipClose_t)(jzfile *zip); 81 typedef jzentry* (JNICALL *FindEntry_t)(jzfile *zip, const char *name, jint *sizeP, jint *nameLen); 82 typedef jboolean (JNICALL *ReadEntry_t)(jzfile *zip, jzentry *entry, unsigned char *buf, char *namebuf); 83 typedef jboolean (JNICALL *ReadMappedEntry_t)(jzfile *zip, jzentry *entry, unsigned char **buf, char *namebuf); 84 typedef jzentry* (JNICALL *GetNextEntry_t)(jzfile *zip, jint n); 85 86 static ZipOpen_t ZipOpen = NULL; 87 static ZipClose_t ZipClose = NULL; 88 static FindEntry_t FindEntry = NULL; 89 static ReadEntry_t ReadEntry = NULL; 90 static ReadMappedEntry_t ReadMappedEntry = NULL; 91 static GetNextEntry_t GetNextEntry = NULL; 92 static canonicalize_fn_t CanonicalizeEntry = NULL; 93 94 // Globals 95 96 PerfCounter* ClassLoader::_perf_accumulated_time = NULL; 97 PerfCounter* ClassLoader::_perf_classes_inited = NULL; 98 PerfCounter* ClassLoader::_perf_class_init_time = NULL; 99 PerfCounter* ClassLoader::_perf_class_init_selftime = NULL; 100 PerfCounter* ClassLoader::_perf_classes_verified = NULL; 101 PerfCounter* ClassLoader::_perf_class_verify_time = NULL; 102 PerfCounter* ClassLoader::_perf_class_verify_selftime = NULL; 103 PerfCounter* ClassLoader::_perf_classes_linked = NULL; 104 PerfCounter* ClassLoader::_perf_class_link_time = NULL; 105 PerfCounter* ClassLoader::_perf_class_link_selftime = NULL; 106 PerfCounter* ClassLoader::_perf_class_parse_time = NULL; 107 PerfCounter* ClassLoader::_perf_class_parse_selftime = NULL; 108 PerfCounter* ClassLoader::_perf_sys_class_lookup_time = NULL; 109 PerfCounter* ClassLoader::_perf_shared_classload_time = NULL; 110 PerfCounter* ClassLoader::_perf_sys_classload_time = NULL; 111 PerfCounter* ClassLoader::_perf_app_classload_time = NULL; 112 PerfCounter* ClassLoader::_perf_app_classload_selftime = NULL; 113 PerfCounter* ClassLoader::_perf_app_classload_count = NULL; 114 PerfCounter* ClassLoader::_perf_define_appclasses = NULL; 115 PerfCounter* ClassLoader::_perf_define_appclass_time = NULL; 116 PerfCounter* ClassLoader::_perf_define_appclass_selftime = NULL; 117 PerfCounter* ClassLoader::_perf_app_classfile_bytes_read = NULL; 118 PerfCounter* ClassLoader::_perf_sys_classfile_bytes_read = NULL; 119 PerfCounter* ClassLoader::_sync_systemLoaderLockContentionRate = NULL; 120 PerfCounter* ClassLoader::_sync_nonSystemLoaderLockContentionRate = NULL; 121 PerfCounter* ClassLoader::_sync_JVMFindLoadedClassLockFreeCounter = NULL; 122 PerfCounter* ClassLoader::_sync_JVMDefineClassLockFreeCounter = NULL; 123 PerfCounter* ClassLoader::_sync_JNIDefineClassLockFreeCounter = NULL; 124 PerfCounter* ClassLoader::_unsafe_defineClassCallCounter = NULL; 125 PerfCounter* ClassLoader::_isUnsyncloadClass = NULL; 126 PerfCounter* ClassLoader::_load_instance_class_failCounter = NULL; 127 128 ClassPathEntry* ClassLoader::_first_entry = NULL; 129 ClassPathEntry* ClassLoader::_last_entry = NULL; 130 PackageHashtable* ClassLoader::_package_hash_table = NULL; 131 132 // helper routines 133 bool string_starts_with(const char* str, const char* str_to_find) { 134 size_t str_len = strlen(str); 135 size_t str_to_find_len = strlen(str_to_find); 136 if (str_to_find_len > str_len) { 137 return false; 138 } 139 return (strncmp(str, str_to_find, str_to_find_len) == 0); 140 } 141 142 bool string_ends_with(const char* str, const char* str_to_find) { 143 size_t str_len = strlen(str); 144 size_t str_to_find_len = strlen(str_to_find); 145 if (str_to_find_len > str_len) { 146 return false; 147 } 148 return (strncmp(str + (str_len - str_to_find_len), str_to_find, str_to_find_len) == 0); 149 } 150 151 152 MetaIndex::MetaIndex(char** meta_package_names, int num_meta_package_names) { 153 if (num_meta_package_names == 0) { 154 _meta_package_names = NULL; 155 _num_meta_package_names = 0; 156 } else { 157 _meta_package_names = NEW_C_HEAP_ARRAY(char*, num_meta_package_names); 158 _num_meta_package_names = num_meta_package_names; 159 memcpy(_meta_package_names, meta_package_names, num_meta_package_names * sizeof(char*)); 160 } 161 } 162 163 164 MetaIndex::~MetaIndex() { 165 FREE_C_HEAP_ARRAY(char*, _meta_package_names); 166 } 167 168 169 bool MetaIndex::may_contain(const char* class_name) { 170 if ( _num_meta_package_names == 0) { 171 return false; 172 } 173 size_t class_name_len = strlen(class_name); 174 for (int i = 0; i < _num_meta_package_names; i++) { 175 char* pkg = _meta_package_names[i]; 176 size_t pkg_len = strlen(pkg); 177 size_t min_len = MIN2(class_name_len, pkg_len); 178 if (!strncmp(class_name, pkg, min_len)) { 179 return true; 180 } 181 } 182 return false; 183 } 184 185 186 ClassPathEntry::ClassPathEntry() { 187 set_next(NULL); 188 } 189 190 191 bool ClassPathEntry::is_lazy() { 192 return false; 193 } 194 195 ClassPathDirEntry::ClassPathDirEntry(char* dir) : ClassPathEntry() { 196 _dir = NEW_C_HEAP_ARRAY(char, strlen(dir)+1); 197 strcpy(_dir, dir); 198 } 199 200 201 ClassFileStream* ClassPathDirEntry::open_stream(const char* name) { 202 // construct full path name 203 char path[JVM_MAXPATHLEN]; 204 if (jio_snprintf(path, sizeof(path), "%s%s%s", _dir, os::file_separator(), name) == -1) { 205 return NULL; 206 } 207 // check if file exists 208 struct stat st; 209 if (os::stat(path, &st) == 0) { 210 // found file, open it 211 int file_handle = hpi::open(path, 0, 0); 212 if (file_handle != -1) { 213 // read contents into resource array 214 u1* buffer = NEW_RESOURCE_ARRAY(u1, st.st_size); 215 size_t num_read = os::read(file_handle, (char*) buffer, st.st_size); 216 // close file 217 hpi::close(file_handle); 218 // construct ClassFileStream 219 if (num_read == (size_t)st.st_size) { 220 if (UsePerfData) { 221 ClassLoader::perf_sys_classfile_bytes_read()->inc(num_read); 222 } 223 return new ClassFileStream(buffer, st.st_size, _dir); // Resource allocated 224 } 225 } 226 } 227 return NULL; 228 } 229 230 231 ClassPathZipEntry::ClassPathZipEntry(jzfile* zip, const char* zip_name) : ClassPathEntry() { 232 _zip = zip; 233 _zip_name = NEW_C_HEAP_ARRAY(char, strlen(zip_name)+1); 234 strcpy(_zip_name, zip_name); 235 } 236 237 ClassPathZipEntry::~ClassPathZipEntry() { 238 if (ZipClose != NULL) { 239 (*ZipClose)(_zip); 240 } 241 FREE_C_HEAP_ARRAY(char, _zip_name); 242 } 243 244 ClassFileStream* ClassPathZipEntry::open_stream(const char* name) { 245 // enable call to C land 246 JavaThread* thread = JavaThread::current(); 247 ThreadToNativeFromVM ttn(thread); 248 // check whether zip archive contains name 249 jint filesize, name_len; 250 jzentry* entry = (*FindEntry)(_zip, name, &filesize, &name_len); 251 if (entry == NULL) return NULL; 252 u1* buffer; 253 char name_buf[128]; 254 char* filename; 255 if (name_len < 128) { 256 filename = name_buf; 257 } else { 258 filename = NEW_RESOURCE_ARRAY(char, name_len + 1); 259 } 260 261 // file found, get pointer to class in mmaped jar file. 262 if (ReadMappedEntry == NULL || 263 !(*ReadMappedEntry)(_zip, entry, &buffer, filename)) { 264 // mmaped access not available, perhaps due to compression, 265 // read contents into resource array 266 buffer = NEW_RESOURCE_ARRAY(u1, filesize); 267 if (!(*ReadEntry)(_zip, entry, buffer, filename)) return NULL; 268 } 269 if (UsePerfData) { 270 ClassLoader::perf_sys_classfile_bytes_read()->inc(filesize); 271 } 272 // return result 273 return new ClassFileStream(buffer, filesize, _zip_name); // Resource allocated 274 } 275 276 // invoke function for each entry in the zip file 277 void ClassPathZipEntry::contents_do(void f(const char* name, void* context), void* context) { 278 JavaThread* thread = JavaThread::current(); 279 HandleMark handle_mark(thread); 280 ThreadToNativeFromVM ttn(thread); 281 for (int n = 0; ; n++) { 282 jzentry * ze = ((*GetNextEntry)(_zip, n)); 283 if (ze == NULL) break; 284 (*f)(ze->name, context); 285 } 286 } 287 288 LazyClassPathEntry::LazyClassPathEntry(char* path, struct stat st) : ClassPathEntry() { 289 _path = strdup(path); 290 _st = st; 291 _meta_index = NULL; 292 _resolved_entry = NULL; 293 } 294 295 bool LazyClassPathEntry::is_jar_file() { 296 return ((_st.st_mode & S_IFREG) == S_IFREG); 297 } 298 299 ClassPathEntry* LazyClassPathEntry::resolve_entry() { 300 if (_resolved_entry != NULL) { 301 return (ClassPathEntry*) _resolved_entry; 302 } 303 ClassPathEntry* new_entry = NULL; 304 ClassLoader::create_class_path_entry(_path, _st, &new_entry, false); 305 assert(new_entry != NULL, "earlier code should have caught this"); 306 { 307 ThreadCritical tc; 308 if (_resolved_entry == NULL) { 309 _resolved_entry = new_entry; 310 return new_entry; 311 } 312 } 313 assert(_resolved_entry != NULL, "bug in MT-safe resolution logic"); 314 delete new_entry; 315 return (ClassPathEntry*) _resolved_entry; 316 } 317 318 ClassFileStream* LazyClassPathEntry::open_stream(const char* name) { 319 if (_meta_index != NULL && 320 !_meta_index->may_contain(name)) { 321 return NULL; 322 } 323 return resolve_entry()->open_stream(name); 324 } 325 326 bool LazyClassPathEntry::is_lazy() { 327 return true; 328 } 329 330 static void print_meta_index(LazyClassPathEntry* entry, 331 GrowableArray<char*>& meta_packages) { 332 tty->print("[Meta index for %s=", entry->name()); 333 for (int i = 0; i < meta_packages.length(); i++) { 334 if (i > 0) tty->print(" "); 335 tty->print(meta_packages.at(i)); 336 } 337 tty->print_cr("]"); 338 } 339 340 341 void ClassLoader::setup_meta_index() { 342 // Set up meta index which allows us to open boot jars lazily if 343 // class data sharing is enabled 344 const char* known_version = "% VERSION 2"; 345 char* meta_index_path = Arguments::get_meta_index_path(); 346 char* meta_index_dir = Arguments::get_meta_index_dir(); 347 FILE* file = fopen(meta_index_path, "r"); 348 int line_no = 0; 349 if (file != NULL) { 350 ResourceMark rm; 351 LazyClassPathEntry* cur_entry = NULL; 352 GrowableArray<char*> boot_class_path_packages(10); 353 char package_name[256]; 354 bool skipCurrentJar = false; 355 while (fgets(package_name, sizeof(package_name), file) != NULL) { 356 ++line_no; 357 // Remove trailing newline 358 package_name[strlen(package_name) - 1] = '\0'; 359 switch(package_name[0]) { 360 case '%': 361 { 362 if ((line_no == 1) && (strcmp(package_name, known_version) != 0)) { 363 if (TraceClassLoading && Verbose) { 364 tty->print("[Unsupported meta index version]"); 365 } 366 fclose(file); 367 return; 368 } 369 } 370 371 // These directives indicate jar files which contain only 372 // classes, only non-classfile resources, or a combination of 373 // the two. See src/share/classes/sun/misc/MetaIndex.java and 374 // make/tools/MetaIndex/BuildMetaIndex.java in the J2SE 375 // workspace. 376 case '#': 377 case '!': 378 case '@': 379 { 380 // Hand off current packages to current lazy entry (if any) 381 if ((cur_entry != NULL) && 382 (boot_class_path_packages.length() > 0)) { 383 if (TraceClassLoading && Verbose) { 384 print_meta_index(cur_entry, boot_class_path_packages); 385 } 386 MetaIndex* index = new MetaIndex(boot_class_path_packages.adr_at(0), 387 boot_class_path_packages.length()); 388 cur_entry->set_meta_index(index); 389 } 390 cur_entry = NULL; 391 boot_class_path_packages.clear(); 392 393 // Find lazy entry corresponding to this jar file 394 for (ClassPathEntry* entry = _first_entry; entry != NULL; entry = entry->next()) { 395 if (entry->is_lazy() && 396 string_starts_with(entry->name(), meta_index_dir) && 397 string_ends_with(entry->name(), &package_name[2])) { 398 cur_entry = (LazyClassPathEntry*) entry; 399 break; 400 } 401 } 402 403 // If the first character is '@', it indicates the following jar 404 // file is a resource only jar file in which case, we should skip 405 // reading the subsequent entries since the resource loading is 406 // totally handled by J2SE side. 407 if (package_name[0] == '@') { 408 if (cur_entry != NULL) { 409 cur_entry->set_meta_index(new MetaIndex(NULL, 0)); 410 } 411 cur_entry = NULL; 412 skipCurrentJar = true; 413 } else { 414 skipCurrentJar = false; 415 } 416 417 break; 418 } 419 420 default: 421 { 422 if (!skipCurrentJar && cur_entry != NULL) { 423 char* new_name = strdup(package_name); 424 boot_class_path_packages.append(new_name); 425 } 426 } 427 } 428 } 429 // Hand off current packages to current lazy entry (if any) 430 if ((cur_entry != NULL) && 431 (boot_class_path_packages.length() > 0)) { 432 if (TraceClassLoading && Verbose) { 433 print_meta_index(cur_entry, boot_class_path_packages); 434 } 435 MetaIndex* index = new MetaIndex(boot_class_path_packages.adr_at(0), 436 boot_class_path_packages.length()); 437 cur_entry->set_meta_index(index); 438 } 439 fclose(file); 440 } 441 } 442 443 void ClassLoader::setup_bootstrap_search_path() { 444 assert(_first_entry == NULL, "should not setup bootstrap class search path twice"); 445 char* sys_class_path = os::strdup(Arguments::get_sysclasspath()); 446 if (TraceClassLoading && Verbose) { 447 tty->print_cr("[Bootstrap loader class path=%s]", sys_class_path); 448 } 449 450 int len = (int)strlen(sys_class_path); 451 int end = 0; 452 453 // Iterate over class path entries 454 for (int start = 0; start < len; start = end) { 455 while (sys_class_path[end] && sys_class_path[end] != os::path_separator()[0]) { 456 end++; 457 } 458 char* path = NEW_C_HEAP_ARRAY(char, end-start+1); 459 strncpy(path, &sys_class_path[start], end-start); 460 path[end-start] = '\0'; 461 update_class_path_entry_list(path, false); 462 FREE_C_HEAP_ARRAY(char, path); 463 while (sys_class_path[end] == os::path_separator()[0]) { 464 end++; 465 } 466 } 467 } 468 469 void ClassLoader::create_class_path_entry(char *path, struct stat st, ClassPathEntry **new_entry, bool lazy) { 470 JavaThread* thread = JavaThread::current(); 471 if (lazy) { 472 *new_entry = new LazyClassPathEntry(path, st); 473 return; 474 } 475 if ((st.st_mode & S_IFREG) == S_IFREG) { 476 // Regular file, should be a zip file 477 // Canonicalized filename 478 char canonical_path[JVM_MAXPATHLEN]; 479 if (!get_canonical_path(path, canonical_path, JVM_MAXPATHLEN)) { 480 // This matches the classic VM 481 EXCEPTION_MARK; 482 THROW_MSG(vmSymbols::java_io_IOException(), "Bad pathname"); 483 } 484 char* error_msg = NULL; 485 jzfile* zip; 486 { 487 // enable call to C land 488 ThreadToNativeFromVM ttn(thread); 489 HandleMark hm(thread); 490 zip = (*ZipOpen)(canonical_path, &error_msg); 491 } 492 if (zip != NULL && error_msg == NULL) { 493 *new_entry = new ClassPathZipEntry(zip, path); 494 if (TraceClassLoading) { 495 tty->print_cr("[Opened %s]", path); 496 } 497 } else { 498 ResourceMark rm(thread); 499 char *msg; 500 if (error_msg == NULL) { 501 msg = NEW_RESOURCE_ARRAY(char, strlen(path) + 128); ; 502 jio_snprintf(msg, strlen(path) + 127, "error in opening JAR file %s", path); 503 } else { 504 int len = (int)(strlen(path) + strlen(error_msg) + 128); 505 msg = NEW_RESOURCE_ARRAY(char, len); ; 506 jio_snprintf(msg, len - 1, "error in opening JAR file <%s> %s", error_msg, path); 507 } 508 EXCEPTION_MARK; 509 THROW_MSG(vmSymbols::java_lang_ClassNotFoundException(), msg); 510 } 511 } else { 512 // Directory 513 *new_entry = new ClassPathDirEntry(path); 514 if (TraceClassLoading) { 515 tty->print_cr("[Path %s]", path); 516 } 517 } 518 } 519 520 521 // Create a class path zip entry for a given path (return NULL if not found 522 // or zip/JAR file cannot be opened) 523 ClassPathZipEntry* ClassLoader::create_class_path_zip_entry(const char *path) { 524 // check for a regular file 525 struct stat st; 526 if (os::stat(path, &st) == 0) { 527 if ((st.st_mode & S_IFREG) == S_IFREG) { 528 char orig_path[JVM_MAXPATHLEN]; 529 char canonical_path[JVM_MAXPATHLEN]; 530 531 strcpy(orig_path, path); 532 if (get_canonical_path(orig_path, canonical_path, JVM_MAXPATHLEN)) { 533 char* error_msg = NULL; 534 jzfile* zip; 535 { 536 // enable call to C land 537 JavaThread* thread = JavaThread::current(); 538 ThreadToNativeFromVM ttn(thread); 539 HandleMark hm(thread); 540 zip = (*ZipOpen)(canonical_path, &error_msg); 541 } 542 if (zip != NULL && error_msg == NULL) { 543 // create using canonical path 544 return new ClassPathZipEntry(zip, canonical_path); 545 } 546 } 547 } 548 } 549 return NULL; 550 } 551 552 // returns true if entry already on class path 553 bool ClassLoader::contains_entry(ClassPathEntry *entry) { 554 ClassPathEntry* e = _first_entry; 555 while (e != NULL) { 556 // assume zip entries have been canonicalized 557 if (strcmp(entry->name(), e->name()) == 0) { 558 return true; 559 } 560 e = e->next(); 561 } 562 return false; 563 } 564 565 void ClassLoader::add_to_list(ClassPathEntry *new_entry) { 566 if (new_entry != NULL) { 567 if (_last_entry == NULL) { 568 _first_entry = _last_entry = new_entry; 569 } else { 570 _last_entry->set_next(new_entry); 571 _last_entry = new_entry; 572 } 573 } 574 } 575 576 void ClassLoader::update_class_path_entry_list(const char *path, 577 bool check_for_duplicates) { 578 struct stat st; 579 if (os::stat((char *)path, &st) == 0) { 580 // File or directory found 581 ClassPathEntry* new_entry = NULL; 582 create_class_path_entry((char *)path, st, &new_entry, LazyBootClassLoader); 583 // The kernel VM adds dynamically to the end of the classloader path and 584 // doesn't reorder the bootclasspath which would break java.lang.Package 585 // (see PackageInfo). 586 // Add new entry to linked list 587 if (!check_for_duplicates || !contains_entry(new_entry)) { 588 add_to_list(new_entry); 589 } 590 } 591 } 592 593 void ClassLoader::print_bootclasspath() { 594 ClassPathEntry* e = _first_entry; 595 tty->print("[bootclasspath= "); 596 while (e != NULL) { 597 tty->print("%s ;", e->name()); 598 e = e->next(); 599 } 600 tty->print_cr("]"); 601 } 602 603 void ClassLoader::load_zip_library() { 604 assert(ZipOpen == NULL, "should not load zip library twice"); 605 // First make sure native library is loaded 606 os::native_java_library(); 607 // Load zip library 608 char path[JVM_MAXPATHLEN]; 609 char ebuf[1024]; 610 hpi::dll_build_name(path, sizeof(path), Arguments::get_dll_dir(), "zip"); 611 void* handle = hpi::dll_load(path, ebuf, sizeof ebuf); 612 if (handle == NULL) { 613 vm_exit_during_initialization("Unable to load ZIP library", path); 614 } 615 // Lookup zip entry points 616 ZipOpen = CAST_TO_FN_PTR(ZipOpen_t, hpi::dll_lookup(handle, "ZIP_Open")); 617 ZipClose = CAST_TO_FN_PTR(ZipClose_t, hpi::dll_lookup(handle, "ZIP_Close")); 618 FindEntry = CAST_TO_FN_PTR(FindEntry_t, hpi::dll_lookup(handle, "ZIP_FindEntry")); 619 ReadEntry = CAST_TO_FN_PTR(ReadEntry_t, hpi::dll_lookup(handle, "ZIP_ReadEntry")); 620 ReadMappedEntry = CAST_TO_FN_PTR(ReadMappedEntry_t, hpi::dll_lookup(handle, "ZIP_ReadMappedEntry")); 621 GetNextEntry = CAST_TO_FN_PTR(GetNextEntry_t, hpi::dll_lookup(handle, "ZIP_GetNextEntry")); 622 623 // ZIP_Close is not exported on Windows in JDK5.0 so don't abort if ZIP_Close is NULL 624 if (ZipOpen == NULL || FindEntry == NULL || ReadEntry == NULL || GetNextEntry == NULL) { 625 vm_exit_during_initialization("Corrupted ZIP library", path); 626 } 627 628 // Lookup canonicalize entry in libjava.dll 629 void *javalib_handle = os::native_java_library(); 630 CanonicalizeEntry = CAST_TO_FN_PTR(canonicalize_fn_t, hpi::dll_lookup(javalib_handle, "Canonicalize")); 631 // This lookup only works on 1.3. Do not check for non-null here 632 } 633 634 // PackageInfo data exists in order to support the java.lang.Package 635 // class. A Package object provides information about a java package 636 // (version, vendor, etc.) which originates in the manifest of the jar 637 // file supplying the package. For application classes, the ClassLoader 638 // object takes care of this. 639 640 // For system (boot) classes, the Java code in the Package class needs 641 // to be able to identify which source jar file contained the boot 642 // class, so that it can extract the manifest from it. This table 643 // identifies java packages with jar files in the boot classpath. 644 645 // Because the boot classpath cannot change, the classpath index is 646 // sufficient to identify the source jar file or directory. (Since 647 // directories have no manifests, the directory name is not required, 648 // but is available.) 649 650 // When using sharing -- the pathnames of entries in the boot classpath 651 // may not be the same at runtime as they were when the archive was 652 // created (NFS, Samba, etc.). The actual files and directories named 653 // in the classpath must be the same files, in the same order, even 654 // though the exact name is not the same. 655 656 class PackageInfo: public BasicHashtableEntry { 657 public: 658 const char* _pkgname; // Package name 659 int _classpath_index; // Index of directory or JAR file loaded from 660 661 PackageInfo* next() { 662 return (PackageInfo*)BasicHashtableEntry::next(); 663 } 664 665 const char* pkgname() { return _pkgname; } 666 void set_pkgname(char* pkgname) { _pkgname = pkgname; } 667 668 const char* filename() { 669 return ClassLoader::classpath_entry(_classpath_index)->name(); 670 } 671 672 void set_index(int index) { 673 _classpath_index = index; 674 } 675 }; 676 677 678 class PackageHashtable : public BasicHashtable { 679 private: 680 inline unsigned int compute_hash(const char *s, int n) { 681 unsigned int val = 0; 682 while (--n >= 0) { 683 val = *s++ + 31 * val; 684 } 685 return val; 686 } 687 688 PackageInfo* bucket(int index) { 689 return (PackageInfo*)BasicHashtable::bucket(index); 690 } 691 692 PackageInfo* get_entry(int index, unsigned int hash, 693 const char* pkgname, size_t n) { 694 for (PackageInfo* pp = bucket(index); pp != NULL; pp = pp->next()) { 695 if (pp->hash() == hash && 696 strncmp(pkgname, pp->pkgname(), n) == 0 && 697 pp->pkgname()[n] == '\0') { 698 return pp; 699 } 700 } 701 return NULL; 702 } 703 704 public: 705 PackageHashtable(int table_size) 706 : BasicHashtable(table_size, sizeof(PackageInfo)) {} 707 708 PackageHashtable(int table_size, HashtableBucket* t, int number_of_entries) 709 : BasicHashtable(table_size, sizeof(PackageInfo), t, number_of_entries) {} 710 711 PackageInfo* get_entry(const char* pkgname, int n) { 712 unsigned int hash = compute_hash(pkgname, n); 713 return get_entry(hash_to_index(hash), hash, pkgname, n); 714 } 715 716 PackageInfo* new_entry(char* pkgname, int n) { 717 unsigned int hash = compute_hash(pkgname, n); 718 PackageInfo* pp; 719 pp = (PackageInfo*)BasicHashtable::new_entry(hash); 720 pp->set_pkgname(pkgname); 721 return pp; 722 } 723 724 void add_entry(PackageInfo* pp) { 725 int index = hash_to_index(pp->hash()); 726 BasicHashtable::add_entry(index, pp); 727 } 728 729 void copy_pkgnames(const char** packages) { 730 int n = 0; 731 for (int i = 0; i < table_size(); ++i) { 732 for (PackageInfo* pp = bucket(i); pp != NULL; pp = pp->next()) { 733 packages[n++] = pp->pkgname(); 734 } 735 } 736 assert(n == number_of_entries(), "just checking"); 737 } 738 739 void copy_table(char** top, char* end, PackageHashtable* table); 740 }; 741 742 743 void PackageHashtable::copy_table(char** top, char* end, 744 PackageHashtable* table) { 745 // Copy (relocate) the table to the shared space. 746 BasicHashtable::copy_table(top, end); 747 748 // Calculate the space needed for the package name strings. 749 int i; 750 int n = 0; 751 for (i = 0; i < table_size(); ++i) { 752 for (PackageInfo* pp = table->bucket(i); 753 pp != NULL; 754 pp = pp->next()) { 755 n += (int)(strlen(pp->pkgname()) + 1); 756 } 757 } 758 if (*top + n + sizeof(intptr_t) >= end) { 759 warning("\nThe shared miscellaneous data space is not large " 760 "enough to \npreload requested classes. Use " 761 "-XX:SharedMiscDataSize= to increase \nthe initial " 762 "size of the miscellaneous data space.\n"); 763 exit(2); 764 } 765 766 // Copy the table data (the strings) to the shared space. 767 n = align_size_up(n, sizeof(HeapWord)); 768 *(intptr_t*)(*top) = n; 769 *top += sizeof(intptr_t); 770 771 for (i = 0; i < table_size(); ++i) { 772 for (PackageInfo* pp = table->bucket(i); 773 pp != NULL; 774 pp = pp->next()) { 775 int n1 = (int)(strlen(pp->pkgname()) + 1); 776 pp->set_pkgname((char*)memcpy(*top, pp->pkgname(), n1)); 777 *top += n1; 778 } 779 } 780 *top = (char*)align_size_up((intptr_t)*top, sizeof(HeapWord)); 781 } 782 783 784 void ClassLoader::copy_package_info_buckets(char** top, char* end) { 785 _package_hash_table->copy_buckets(top, end); 786 } 787 788 void ClassLoader::copy_package_info_table(char** top, char* end) { 789 _package_hash_table->copy_table(top, end, _package_hash_table); 790 } 791 792 793 PackageInfo* ClassLoader::lookup_package(const char *pkgname) { 794 const char *cp = strrchr(pkgname, '/'); 795 if (cp != NULL) { 796 // Package prefix found 797 int n = cp - pkgname + 1; 798 return _package_hash_table->get_entry(pkgname, n); 799 } 800 return NULL; 801 } 802 803 804 bool ClassLoader::add_package(const char *pkgname, int classpath_index, TRAPS) { 805 assert(pkgname != NULL, "just checking"); 806 // Bootstrap loader no longer holds system loader lock obj serializing 807 // load_instance_class and thereby add_package 808 { 809 MutexLocker ml(PackageTable_lock, THREAD); 810 // First check for previously loaded entry 811 PackageInfo* pp = lookup_package(pkgname); 812 if (pp != NULL) { 813 // Existing entry found, check source of package 814 pp->set_index(classpath_index); 815 return true; 816 } 817 818 const char *cp = strrchr(pkgname, '/'); 819 if (cp != NULL) { 820 // Package prefix found 821 int n = cp - pkgname + 1; 822 823 char* new_pkgname = NEW_C_HEAP_ARRAY(char, n + 1); 824 if (new_pkgname == NULL) { 825 return false; 826 } 827 828 memcpy(new_pkgname, pkgname, n); 829 new_pkgname[n] = '\0'; 830 pp = _package_hash_table->new_entry(new_pkgname, n); 831 pp->set_index(classpath_index); 832 833 // Insert into hash table 834 _package_hash_table->add_entry(pp); 835 } 836 return true; 837 } 838 } 839 840 841 oop ClassLoader::get_system_package(const char* name, TRAPS) { 842 PackageInfo* pp; 843 { 844 MutexLocker ml(PackageTable_lock, THREAD); 845 pp = lookup_package(name); 846 } 847 if (pp == NULL) { 848 return NULL; 849 } else { 850 Handle p = java_lang_String::create_from_str(pp->filename(), THREAD); 851 return p(); 852 } 853 } 854 855 856 objArrayOop ClassLoader::get_system_packages(TRAPS) { 857 ResourceMark rm(THREAD); 858 int nof_entries; 859 const char** packages; 860 { 861 MutexLocker ml(PackageTable_lock, THREAD); 862 // Allocate resource char* array containing package names 863 nof_entries = _package_hash_table->number_of_entries(); 864 if ((packages = NEW_RESOURCE_ARRAY(const char*, nof_entries)) == NULL) { 865 return NULL; 866 } 867 _package_hash_table->copy_pkgnames(packages); 868 } 869 // Allocate objArray and fill with java.lang.String 870 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 871 nof_entries, CHECK_0); 872 objArrayHandle result(THREAD, r); 873 for (int i = 0; i < nof_entries; i++) { 874 Handle str = java_lang_String::create_from_str(packages[i], CHECK_0); 875 result->obj_at_put(i, str()); 876 } 877 878 return result(); 879 } 880 881 882 instanceKlassHandle ClassLoader::load_classfile(symbolHandle h_name, TRAPS) { 883 ResourceMark rm(THREAD); 884 EventMark m("loading class " INTPTR_FORMAT, (address)h_name()); 885 ThreadProfilerMark tpm(ThreadProfilerMark::classLoaderRegion); 886 887 stringStream st; 888 // st.print() uses too much stack space while handling a StackOverflowError 889 // st.print("%s.class", h_name->as_utf8()); 890 st.print_raw(h_name->as_utf8()); 891 st.print_raw(".class"); 892 char* name = st.as_string(); 893 894 // Lookup stream for parsing .class file 895 ClassFileStream* stream = NULL; 896 int classpath_index = 0; 897 { 898 PerfClassTraceTime vmtimer(perf_sys_class_lookup_time(), 899 ((JavaThread*) THREAD)->get_thread_stat()->perf_timers_addr(), 900 PerfClassTraceTime::CLASS_LOAD); 901 ClassPathEntry* e = _first_entry; 902 while (e != NULL) { 903 stream = e->open_stream(name); 904 if (stream != NULL) { 905 break; 906 } 907 e = e->next(); 908 ++classpath_index; 909 } 910 } 911 912 instanceKlassHandle h(THREAD, klassOop(NULL)); 913 if (stream != NULL) { 914 915 // class file found, parse it 916 ClassFileParser parser(stream); 917 Handle class_loader; 918 Handle protection_domain; 919 symbolHandle parsed_name; 920 instanceKlassHandle result = parser.parseClassFile(h_name, 921 class_loader, 922 protection_domain, 923 parsed_name, 924 false, 925 CHECK_(h)); 926 927 // add to package table 928 if (add_package(name, classpath_index, THREAD)) { 929 h = result; 930 } 931 } 932 933 return h; 934 } 935 936 937 void ClassLoader::create_package_info_table(HashtableBucket *t, int length, 938 int number_of_entries) { 939 assert(_package_hash_table == NULL, "One package info table allowed."); 940 assert(length == package_hash_table_size * sizeof(HashtableBucket), 941 "bad shared package info size."); 942 _package_hash_table = new PackageHashtable(package_hash_table_size, t, 943 number_of_entries); 944 } 945 946 947 void ClassLoader::create_package_info_table() { 948 assert(_package_hash_table == NULL, "shouldn't have one yet"); 949 _package_hash_table = new PackageHashtable(package_hash_table_size); 950 } 951 952 953 // Initialize the class loader's access to methods in libzip. Parse and 954 // process the boot classpath into a list ClassPathEntry objects. Once 955 // this list has been created, it must not change order (see class PackageInfo) 956 // it can be appended to and is by jvmti and the kernel vm. 957 958 void ClassLoader::initialize() { 959 assert(_package_hash_table == NULL, "should have been initialized by now."); 960 EXCEPTION_MARK; 961 962 if (UsePerfData) { 963 // jvmstat performance counters 964 NEWPERFTICKCOUNTER(_perf_accumulated_time, SUN_CLS, "time"); 965 NEWPERFTICKCOUNTER(_perf_class_init_time, SUN_CLS, "classInitTime"); 966 NEWPERFTICKCOUNTER(_perf_class_init_selftime, SUN_CLS, "classInitTime.self"); 967 NEWPERFTICKCOUNTER(_perf_class_verify_time, SUN_CLS, "classVerifyTime"); 968 NEWPERFTICKCOUNTER(_perf_class_verify_selftime, SUN_CLS, "classVerifyTime.self"); 969 NEWPERFTICKCOUNTER(_perf_class_link_time, SUN_CLS, "classLinkedTime"); 970 NEWPERFTICKCOUNTER(_perf_class_link_selftime, SUN_CLS, "classLinkedTime.self"); 971 NEWPERFEVENTCOUNTER(_perf_classes_inited, SUN_CLS, "initializedClasses"); 972 NEWPERFEVENTCOUNTER(_perf_classes_linked, SUN_CLS, "linkedClasses"); 973 NEWPERFEVENTCOUNTER(_perf_classes_verified, SUN_CLS, "verifiedClasses"); 974 975 NEWPERFTICKCOUNTER(_perf_class_parse_time, SUN_CLS, "parseClassTime"); 976 NEWPERFTICKCOUNTER(_perf_class_parse_selftime, SUN_CLS, "parseClassTime.self"); 977 NEWPERFTICKCOUNTER(_perf_sys_class_lookup_time, SUN_CLS, "lookupSysClassTime"); 978 NEWPERFTICKCOUNTER(_perf_shared_classload_time, SUN_CLS, "sharedClassLoadTime"); 979 NEWPERFTICKCOUNTER(_perf_sys_classload_time, SUN_CLS, "sysClassLoadTime"); 980 NEWPERFTICKCOUNTER(_perf_app_classload_time, SUN_CLS, "appClassLoadTime"); 981 NEWPERFTICKCOUNTER(_perf_app_classload_selftime, SUN_CLS, "appClassLoadTime.self"); 982 NEWPERFEVENTCOUNTER(_perf_app_classload_count, SUN_CLS, "appClassLoadCount"); 983 NEWPERFTICKCOUNTER(_perf_define_appclasses, SUN_CLS, "defineAppClasses"); 984 NEWPERFTICKCOUNTER(_perf_define_appclass_time, SUN_CLS, "defineAppClassTime"); 985 NEWPERFTICKCOUNTER(_perf_define_appclass_selftime, SUN_CLS, "defineAppClassTime.self"); 986 NEWPERFBYTECOUNTER(_perf_app_classfile_bytes_read, SUN_CLS, "appClassBytes"); 987 NEWPERFBYTECOUNTER(_perf_sys_classfile_bytes_read, SUN_CLS, "sysClassBytes"); 988 989 990 // The following performance counters are added for measuring the impact 991 // of the bug fix of 6365597. They are mainly focused on finding out 992 // the behavior of system & user-defined classloader lock, whether 993 // ClassLoader.loadClass/findClass is being called synchronized or not. 994 // Also two additional counters are created to see whether 'UnsyncloadClass' 995 // flag is being set or not and how many times load_instance_class call 996 // fails with linkageError etc. 997 NEWPERFEVENTCOUNTER(_sync_systemLoaderLockContentionRate, SUN_CLS, 998 "systemLoaderLockContentionRate"); 999 NEWPERFEVENTCOUNTER(_sync_nonSystemLoaderLockContentionRate, SUN_CLS, 1000 "nonSystemLoaderLockContentionRate"); 1001 NEWPERFEVENTCOUNTER(_sync_JVMFindLoadedClassLockFreeCounter, SUN_CLS, 1002 "jvmFindLoadedClassNoLockCalls"); 1003 NEWPERFEVENTCOUNTER(_sync_JVMDefineClassLockFreeCounter, SUN_CLS, 1004 "jvmDefineClassNoLockCalls"); 1005 1006 NEWPERFEVENTCOUNTER(_sync_JNIDefineClassLockFreeCounter, SUN_CLS, 1007 "jniDefineClassNoLockCalls"); 1008 1009 NEWPERFEVENTCOUNTER(_unsafe_defineClassCallCounter, SUN_CLS, 1010 "unsafeDefineClassCalls"); 1011 1012 NEWPERFEVENTCOUNTER(_isUnsyncloadClass, SUN_CLS, "isUnsyncloadClassSet"); 1013 NEWPERFEVENTCOUNTER(_load_instance_class_failCounter, SUN_CLS, 1014 "loadInstanceClassFailRate"); 1015 1016 // increment the isUnsyncloadClass counter if UnsyncloadClass is set. 1017 if (UnsyncloadClass) { 1018 _isUnsyncloadClass->inc(); 1019 } 1020 } 1021 1022 // lookup zip library entry points 1023 load_zip_library(); 1024 // initialize search path 1025 setup_bootstrap_search_path(); 1026 if (LazyBootClassLoader) { 1027 // set up meta index which makes boot classpath initialization lazier 1028 setup_meta_index(); 1029 } 1030 } 1031 1032 1033 jlong ClassLoader::classloader_time_ms() { 1034 return UsePerfData ? 1035 Management::ticks_to_ms(_perf_accumulated_time->get_value()) : -1; 1036 } 1037 1038 jlong ClassLoader::class_init_count() { 1039 return UsePerfData ? _perf_classes_inited->get_value() : -1; 1040 } 1041 1042 jlong ClassLoader::class_init_time_ms() { 1043 return UsePerfData ? 1044 Management::ticks_to_ms(_perf_class_init_time->get_value()) : -1; 1045 } 1046 1047 jlong ClassLoader::class_verify_time_ms() { 1048 return UsePerfData ? 1049 Management::ticks_to_ms(_perf_class_verify_time->get_value()) : -1; 1050 } 1051 1052 jlong ClassLoader::class_link_count() { 1053 return UsePerfData ? _perf_classes_linked->get_value() : -1; 1054 } 1055 1056 jlong ClassLoader::class_link_time_ms() { 1057 return UsePerfData ? 1058 Management::ticks_to_ms(_perf_class_link_time->get_value()) : -1; 1059 } 1060 1061 int ClassLoader::compute_Object_vtable() { 1062 // hardwired for JDK1.2 -- would need to duplicate class file parsing 1063 // code to determine actual value from file 1064 // Would be value '11' if finals were in vtable 1065 int JDK_1_2_Object_vtable_size = 5; 1066 return JDK_1_2_Object_vtable_size * vtableEntry::size(); 1067 } 1068 1069 1070 void classLoader_init() { 1071 ClassLoader::initialize(); 1072 } 1073 1074 1075 bool ClassLoader::get_canonical_path(char* orig, char* out, int len) { 1076 assert(orig != NULL && out != NULL && len > 0, "bad arguments"); 1077 if (CanonicalizeEntry != NULL) { 1078 JNIEnv* env = JavaThread::current()->jni_environment(); 1079 if ((CanonicalizeEntry)(env, hpi::native_path(orig), out, len) < 0) { 1080 return false; 1081 } 1082 } else { 1083 // On JDK 1.2.2 the Canonicalize does not exist, so just do nothing 1084 strncpy(out, orig, len); 1085 out[len - 1] = '\0'; 1086 } 1087 return true; 1088 } 1089 1090 #ifndef PRODUCT 1091 1092 void ClassLoader::verify() { 1093 _package_hash_table->verify(); 1094 } 1095 1096 1097 // CompileTheWorld 1098 // 1099 // Iterates over all class path entries and forces compilation of all methods 1100 // in all classes found. Currently, only zip/jar archives are searched. 1101 // 1102 // The classes are loaded by the Java level bootstrap class loader, and the 1103 // initializer is called. If DelayCompilationDuringStartup is true (default), 1104 // the interpreter will run the initialization code. Note that forcing 1105 // initialization in this way could potentially lead to initialization order 1106 // problems, in which case we could just force the initialization bit to be set. 1107 1108 1109 // We need to iterate over the contents of a zip/jar file, so we replicate the 1110 // jzcell and jzfile definitions from zip_util.h but rename jzfile to real_jzfile, 1111 // since jzfile already has a void* definition. 1112 // 1113 // Note that this is only used in debug mode. 1114 // 1115 // HotSpot integration note: 1116 // Matches zip_util.h 1.14 99/06/01 from jdk1.3 beta H build 1117 1118 1119 // JDK 1.3 version 1120 typedef struct real_jzentry13 { /* Zip file entry */ 1121 char *name; /* entry name */ 1122 jint time; /* modification time */ 1123 jint size; /* size of uncompressed data */ 1124 jint csize; /* size of compressed data (zero if uncompressed) */ 1125 jint crc; /* crc of uncompressed data */ 1126 char *comment; /* optional zip file comment */ 1127 jbyte *extra; /* optional extra data */ 1128 jint pos; /* position of LOC header (if negative) or data */ 1129 } real_jzentry13; 1130 1131 typedef struct real_jzfile13 { /* Zip file */ 1132 char *name; /* zip file name */ 1133 jint refs; /* number of active references */ 1134 jint fd; /* open file descriptor */ 1135 void *lock; /* read lock */ 1136 char *comment; /* zip file comment */ 1137 char *msg; /* zip error message */ 1138 void *entries; /* array of hash cells */ 1139 jint total; /* total number of entries */ 1140 unsigned short *table; /* Hash chain heads: indexes into entries */ 1141 jint tablelen; /* number of hash eads */ 1142 real_jzfile13 *next; /* next zip file in search list */ 1143 jzentry *cache; /* we cache the most recently freed jzentry */ 1144 /* Information on metadata names in META-INF directory */ 1145 char **metanames; /* array of meta names (may have null names) */ 1146 jint metacount; /* number of slots in metanames array */ 1147 /* If there are any per-entry comments, they are in the comments array */ 1148 char **comments; 1149 } real_jzfile13; 1150 1151 // JDK 1.2 version 1152 typedef struct real_jzentry12 { /* Zip file entry */ 1153 char *name; /* entry name */ 1154 jint time; /* modification time */ 1155 jint size; /* size of uncompressed data */ 1156 jint csize; /* size of compressed data (zero if uncompressed) */ 1157 jint crc; /* crc of uncompressed data */ 1158 char *comment; /* optional zip file comment */ 1159 jbyte *extra; /* optional extra data */ 1160 jint pos; /* position of LOC header (if negative) or data */ 1161 struct real_jzentry12 *next; /* next entry in hash table */ 1162 } real_jzentry12; 1163 1164 typedef struct real_jzfile12 { /* Zip file */ 1165 char *name; /* zip file name */ 1166 jint refs; /* number of active references */ 1167 jint fd; /* open file descriptor */ 1168 void *lock; /* read lock */ 1169 char *comment; /* zip file comment */ 1170 char *msg; /* zip error message */ 1171 real_jzentry12 *entries; /* array of zip entries */ 1172 jint total; /* total number of entries */ 1173 real_jzentry12 **table; /* hash table of entries */ 1174 jint tablelen; /* number of buckets */ 1175 jzfile *next; /* next zip file in search list */ 1176 } real_jzfile12; 1177 1178 1179 void ClassPathDirEntry::compile_the_world(Handle loader, TRAPS) { 1180 // For now we only compile all methods in all classes in zip/jar files 1181 tty->print_cr("CompileTheWorld : Skipped classes in %s", _dir); 1182 tty->cr(); 1183 } 1184 1185 1186 bool ClassPathDirEntry::is_rt_jar() { 1187 return false; 1188 } 1189 1190 void ClassPathZipEntry::compile_the_world(Handle loader, TRAPS) { 1191 if (JDK_Version::is_jdk12x_version()) { 1192 compile_the_world12(loader, THREAD); 1193 } else { 1194 compile_the_world13(loader, THREAD); 1195 } 1196 if (HAS_PENDING_EXCEPTION) { 1197 if (PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())) { 1198 CLEAR_PENDING_EXCEPTION; 1199 tty->print_cr("\nCompileTheWorld : Ran out of memory\n"); 1200 size_t used = Universe::heap()->permanent_used(); 1201 size_t capacity = Universe::heap()->permanent_capacity(); 1202 tty->print_cr("Permanent generation used %dK of %dK", used/K, capacity/K); 1203 tty->print_cr("Increase size by setting e.g. -XX:MaxPermSize=%dK\n", capacity*2/K); 1204 } else { 1205 tty->print_cr("\nCompileTheWorld : Unexpected exception occurred\n"); 1206 } 1207 } 1208 } 1209 1210 // Version that works for JDK 1.3.x 1211 void ClassPathZipEntry::compile_the_world13(Handle loader, TRAPS) { 1212 real_jzfile13* zip = (real_jzfile13*) _zip; 1213 tty->print_cr("CompileTheWorld : Compiling all classes in %s", zip->name); 1214 tty->cr(); 1215 // Iterate over all entries in zip file 1216 for (int n = 0; ; n++) { 1217 real_jzentry13 * ze = (real_jzentry13 *)((*GetNextEntry)(_zip, n)); 1218 if (ze == NULL) break; 1219 ClassLoader::compile_the_world_in(ze->name, loader, CHECK); 1220 } 1221 } 1222 1223 1224 // Version that works for JDK 1.2.x 1225 void ClassPathZipEntry::compile_the_world12(Handle loader, TRAPS) { 1226 real_jzfile12* zip = (real_jzfile12*) _zip; 1227 tty->print_cr("CompileTheWorld : Compiling all classes in %s", zip->name); 1228 tty->cr(); 1229 // Iterate over all entries in zip file 1230 for (int n = 0; ; n++) { 1231 real_jzentry12 * ze = (real_jzentry12 *)((*GetNextEntry)(_zip, n)); 1232 if (ze == NULL) break; 1233 ClassLoader::compile_the_world_in(ze->name, loader, CHECK); 1234 } 1235 } 1236 1237 bool ClassPathZipEntry::is_rt_jar() { 1238 if (JDK_Version::is_jdk12x_version()) { 1239 return is_rt_jar12(); 1240 } else { 1241 return is_rt_jar13(); 1242 } 1243 } 1244 1245 // JDK 1.3 version 1246 bool ClassPathZipEntry::is_rt_jar13() { 1247 real_jzfile13* zip = (real_jzfile13*) _zip; 1248 int len = (int)strlen(zip->name); 1249 // Check whether zip name ends in "rt.jar" 1250 // This will match other archives named rt.jar as well, but this is 1251 // only used for debugging. 1252 return (len >= 6) && (strcasecmp(zip->name + len - 6, "rt.jar") == 0); 1253 } 1254 1255 // JDK 1.2 version 1256 bool ClassPathZipEntry::is_rt_jar12() { 1257 real_jzfile12* zip = (real_jzfile12*) _zip; 1258 int len = (int)strlen(zip->name); 1259 // Check whether zip name ends in "rt.jar" 1260 // This will match other archives named rt.jar as well, but this is 1261 // only used for debugging. 1262 return (len >= 6) && (strcasecmp(zip->name + len - 6, "rt.jar") == 0); 1263 } 1264 1265 void LazyClassPathEntry::compile_the_world(Handle loader, TRAPS) { 1266 resolve_entry()->compile_the_world(loader, CHECK); 1267 } 1268 1269 bool LazyClassPathEntry::is_rt_jar() { 1270 return resolve_entry()->is_rt_jar(); 1271 } 1272 1273 void ClassLoader::compile_the_world() { 1274 EXCEPTION_MARK; 1275 HandleMark hm(THREAD); 1276 ResourceMark rm(THREAD); 1277 // Make sure we don't run with background compilation 1278 BackgroundCompilation = false; 1279 // Find bootstrap loader 1280 Handle system_class_loader (THREAD, SystemDictionary::java_system_loader()); 1281 // Iterate over all bootstrap class path entries 1282 ClassPathEntry* e = _first_entry; 1283 while (e != NULL) { 1284 // We stop at rt.jar, unless it is the first bootstrap path entry 1285 if (e->is_rt_jar() && e != _first_entry) break; 1286 e->compile_the_world(system_class_loader, CATCH); 1287 e = e->next(); 1288 } 1289 tty->print_cr("CompileTheWorld : Done"); 1290 { 1291 // Print statistics as if before normal exit: 1292 extern void print_statistics(); 1293 print_statistics(); 1294 } 1295 vm_exit(0); 1296 } 1297 1298 int ClassLoader::_compile_the_world_counter = 0; 1299 static int _codecache_sweep_counter = 0; 1300 1301 void ClassLoader::compile_the_world_in(char* name, Handle loader, TRAPS) { 1302 int len = (int)strlen(name); 1303 if (len > 6 && strcmp(".class", name + len - 6) == 0) { 1304 // We have a .class file 1305 char buffer[2048]; 1306 strncpy(buffer, name, len - 6); 1307 buffer[len-6] = 0; 1308 // If the file has a period after removing .class, it's not really a 1309 // valid class file. The class loader will check everything else. 1310 if (strchr(buffer, '.') == NULL) { 1311 _compile_the_world_counter++; 1312 if (_compile_the_world_counter > CompileTheWorldStopAt) return; 1313 1314 // Construct name without extension 1315 symbolHandle sym = oopFactory::new_symbol_handle(buffer, CHECK); 1316 // Use loader to load and initialize class 1317 klassOop ik = SystemDictionary::resolve_or_null(sym, loader, Handle(), THREAD); 1318 instanceKlassHandle k (THREAD, ik); 1319 if (k.not_null() && !HAS_PENDING_EXCEPTION) { 1320 k->initialize(THREAD); 1321 } 1322 bool exception_occurred = HAS_PENDING_EXCEPTION; 1323 CLEAR_PENDING_EXCEPTION; 1324 if (CompileTheWorldPreloadClasses && k.not_null()) { 1325 constantPoolKlass::preload_and_initialize_all_classes(k->constants(), THREAD); 1326 if (HAS_PENDING_EXCEPTION) { 1327 // If something went wrong in preloading we just ignore it 1328 CLEAR_PENDING_EXCEPTION; 1329 tty->print_cr("Preloading failed for (%d) %s", _compile_the_world_counter, buffer); 1330 } 1331 } 1332 1333 if (_compile_the_world_counter >= CompileTheWorldStartAt) { 1334 if (k.is_null() || (exception_occurred && !CompileTheWorldIgnoreInitErrors)) { 1335 // If something went wrong (e.g. ExceptionInInitializerError) we skip this class 1336 tty->print_cr("CompileTheWorld (%d) : Skipping %s", _compile_the_world_counter, buffer); 1337 } else { 1338 tty->print_cr("CompileTheWorld (%d) : %s", _compile_the_world_counter, buffer); 1339 // Preload all classes to get around uncommon traps 1340 // Iterate over all methods in class 1341 for (int n = 0; n < k->methods()->length(); n++) { 1342 methodHandle m (THREAD, methodOop(k->methods()->obj_at(n))); 1343 if (CompilationPolicy::can_be_compiled(m)) { 1344 1345 if (++_codecache_sweep_counter == CompileTheWorldSafepointInterval) { 1346 // Give sweeper a chance to keep up with CTW 1347 VM_ForceSafepoint op; 1348 VMThread::execute(&op); 1349 _codecache_sweep_counter = 0; 1350 } 1351 // Force compilation 1352 CompileBroker::compile_method(m, InvocationEntryBci, CompLevel_initial_compile, 1353 methodHandle(), 0, "CTW", THREAD); 1354 if (HAS_PENDING_EXCEPTION) { 1355 CLEAR_PENDING_EXCEPTION; 1356 tty->print_cr("CompileTheWorld (%d) : Skipping method: %s", _compile_the_world_counter, m->name()->as_C_string()); 1357 } 1358 if (TieredCompilation) { 1359 // Clobber the first compile and force second tier compilation 1360 nmethod* nm = m->code(); 1361 if (nm != NULL) { 1362 // Throw out the code so that the code cache doesn't fill up 1363 nm->make_not_entrant(); 1364 m->clear_code(); 1365 } 1366 CompileBroker::compile_method(m, InvocationEntryBci, CompLevel_full_optimization, 1367 methodHandle(), 0, "CTW", THREAD); 1368 if (HAS_PENDING_EXCEPTION) { 1369 CLEAR_PENDING_EXCEPTION; 1370 tty->print_cr("CompileTheWorld (%d) : Skipping method: %s", _compile_the_world_counter, m->name()->as_C_string()); 1371 } 1372 } 1373 } 1374 1375 nmethod* nm = m->code(); 1376 if (nm != NULL) { 1377 // Throw out the code so that the code cache doesn't fill up 1378 nm->make_not_entrant(); 1379 m->clear_code(); 1380 } 1381 } 1382 } 1383 } 1384 } 1385 } 1386 } 1387 1388 #endif //PRODUCT