classLoader.cpp revision 6412:53a41e7cbe05
1/* 2 * Copyright (c) 1997, 2014, 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/classLoaderData.inline.hpp" 30#include "classfile/javaClasses.hpp" 31#include "classfile/systemDictionary.hpp" 32#include "classfile/vmSymbols.hpp" 33#include "compiler/compileBroker.hpp" 34#include "gc_interface/collectedHeap.inline.hpp" 35#include "interpreter/bytecodeStream.hpp" 36#include "interpreter/oopMapCache.hpp" 37#include "memory/allocation.inline.hpp" 38#include "memory/generation.hpp" 39#include "memory/oopFactory.hpp" 40#include "memory/universe.inline.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#ifdef TARGET_OS_FAMILY_aix 72# include "os_aix.inline.hpp" 73#endif 74#ifdef TARGET_OS_FAMILY_bsd 75# include "os_bsd.inline.hpp" 76#endif 77 78 79// Entry points in zip.dll for loading zip/jar file entries 80 81typedef void * * (JNICALL *ZipOpen_t)(const char *name, char **pmsg); 82typedef void (JNICALL *ZipClose_t)(jzfile *zip); 83typedef jzentry* (JNICALL *FindEntry_t)(jzfile *zip, const char *name, jint *sizeP, jint *nameLen); 84typedef jboolean (JNICALL *ReadEntry_t)(jzfile *zip, jzentry *entry, unsigned char *buf, char *namebuf); 85typedef jboolean (JNICALL *ReadMappedEntry_t)(jzfile *zip, jzentry *entry, unsigned char **buf, char *namebuf); 86typedef jzentry* (JNICALL *GetNextEntry_t)(jzfile *zip, jint n); 87 88static ZipOpen_t ZipOpen = NULL; 89static ZipClose_t ZipClose = NULL; 90static FindEntry_t FindEntry = NULL; 91static ReadEntry_t ReadEntry = NULL; 92static ReadMappedEntry_t ReadMappedEntry = NULL; 93static GetNextEntry_t GetNextEntry = NULL; 94static canonicalize_fn_t CanonicalizeEntry = NULL; 95 96// Globals 97 98PerfCounter* ClassLoader::_perf_accumulated_time = NULL; 99PerfCounter* ClassLoader::_perf_classes_inited = NULL; 100PerfCounter* ClassLoader::_perf_class_init_time = NULL; 101PerfCounter* ClassLoader::_perf_class_init_selftime = NULL; 102PerfCounter* ClassLoader::_perf_classes_verified = NULL; 103PerfCounter* ClassLoader::_perf_class_verify_time = NULL; 104PerfCounter* ClassLoader::_perf_class_verify_selftime = NULL; 105PerfCounter* ClassLoader::_perf_classes_linked = NULL; 106PerfCounter* ClassLoader::_perf_class_link_time = NULL; 107PerfCounter* ClassLoader::_perf_class_link_selftime = NULL; 108PerfCounter* ClassLoader::_perf_class_parse_time = NULL; 109PerfCounter* ClassLoader::_perf_class_parse_selftime = NULL; 110PerfCounter* ClassLoader::_perf_sys_class_lookup_time = NULL; 111PerfCounter* ClassLoader::_perf_shared_classload_time = NULL; 112PerfCounter* ClassLoader::_perf_sys_classload_time = NULL; 113PerfCounter* ClassLoader::_perf_app_classload_time = NULL; 114PerfCounter* ClassLoader::_perf_app_classload_selftime = NULL; 115PerfCounter* ClassLoader::_perf_app_classload_count = NULL; 116PerfCounter* ClassLoader::_perf_define_appclasses = NULL; 117PerfCounter* ClassLoader::_perf_define_appclass_time = NULL; 118PerfCounter* ClassLoader::_perf_define_appclass_selftime = NULL; 119PerfCounter* ClassLoader::_perf_app_classfile_bytes_read = NULL; 120PerfCounter* ClassLoader::_perf_sys_classfile_bytes_read = NULL; 121PerfCounter* ClassLoader::_sync_systemLoaderLockContentionRate = NULL; 122PerfCounter* ClassLoader::_sync_nonSystemLoaderLockContentionRate = NULL; 123PerfCounter* ClassLoader::_sync_JVMFindLoadedClassLockFreeCounter = NULL; 124PerfCounter* ClassLoader::_sync_JVMDefineClassLockFreeCounter = NULL; 125PerfCounter* ClassLoader::_sync_JNIDefineClassLockFreeCounter = NULL; 126PerfCounter* ClassLoader::_unsafe_defineClassCallCounter = NULL; 127PerfCounter* ClassLoader::_isUnsyncloadClass = NULL; 128PerfCounter* ClassLoader::_load_instance_class_failCounter = NULL; 129 130ClassPathEntry* ClassLoader::_first_entry = NULL; 131ClassPathEntry* ClassLoader::_last_entry = NULL; 132PackageHashtable* ClassLoader::_package_hash_table = NULL; 133 134// helper routines 135bool string_starts_with(const char* str, const char* str_to_find) { 136 size_t str_len = strlen(str); 137 size_t str_to_find_len = strlen(str_to_find); 138 if (str_to_find_len > str_len) { 139 return false; 140 } 141 return (strncmp(str, str_to_find, str_to_find_len) == 0); 142} 143 144bool string_ends_with(const char* str, const char* str_to_find) { 145 size_t str_len = strlen(str); 146 size_t str_to_find_len = strlen(str_to_find); 147 if (str_to_find_len > str_len) { 148 return false; 149 } 150 return (strncmp(str + (str_len - str_to_find_len), str_to_find, str_to_find_len) == 0); 151} 152 153 154MetaIndex::MetaIndex(char** meta_package_names, int num_meta_package_names) { 155 if (num_meta_package_names == 0) { 156 _meta_package_names = NULL; 157 _num_meta_package_names = 0; 158 } else { 159 _meta_package_names = NEW_C_HEAP_ARRAY(char*, num_meta_package_names, mtClass); 160 _num_meta_package_names = num_meta_package_names; 161 memcpy(_meta_package_names, meta_package_names, num_meta_package_names * sizeof(char*)); 162 } 163} 164 165 166MetaIndex::~MetaIndex() { 167 FREE_C_HEAP_ARRAY(char*, _meta_package_names, mtClass); 168} 169 170 171bool MetaIndex::may_contain(const char* class_name) { 172 if ( _num_meta_package_names == 0) { 173 return false; 174 } 175 size_t class_name_len = strlen(class_name); 176 for (int i = 0; i < _num_meta_package_names; i++) { 177 char* pkg = _meta_package_names[i]; 178 size_t pkg_len = strlen(pkg); 179 size_t min_len = MIN2(class_name_len, pkg_len); 180 if (!strncmp(class_name, pkg, min_len)) { 181 return true; 182 } 183 } 184 return false; 185} 186 187 188ClassPathEntry::ClassPathEntry() { 189 set_next(NULL); 190} 191 192 193bool ClassPathEntry::is_lazy() { 194 return false; 195} 196 197ClassPathDirEntry::ClassPathDirEntry(char* dir) : ClassPathEntry() { 198 _dir = NEW_C_HEAP_ARRAY(char, strlen(dir)+1, mtClass); 199 strcpy(_dir, dir); 200} 201 202 203ClassFileStream* ClassPathDirEntry::open_stream(const char* name, TRAPS) { 204 // construct full path name 205 char path[JVM_MAXPATHLEN]; 206 if (jio_snprintf(path, sizeof(path), "%s%s%s", _dir, os::file_separator(), name) == -1) { 207 return NULL; 208 } 209 // check if file exists 210 struct stat st; 211 if (os::stat(path, &st) == 0) { 212 // found file, open it 213 int file_handle = os::open(path, 0, 0); 214 if (file_handle != -1) { 215 // read contents into resource array 216 u1* buffer = NEW_RESOURCE_ARRAY(u1, st.st_size); 217 size_t num_read = os::read(file_handle, (char*) buffer, st.st_size); 218 // close file 219 os::close(file_handle); 220 // construct ClassFileStream 221 if (num_read == (size_t)st.st_size) { 222 if (UsePerfData) { 223 ClassLoader::perf_sys_classfile_bytes_read()->inc(num_read); 224 } 225 return new ClassFileStream(buffer, st.st_size, _dir); // Resource allocated 226 } 227 } 228 } 229 return NULL; 230} 231 232 233ClassPathZipEntry::ClassPathZipEntry(jzfile* zip, const char* zip_name) : ClassPathEntry() { 234 _zip = zip; 235 _zip_name = NEW_C_HEAP_ARRAY(char, strlen(zip_name)+1, mtClass); 236 strcpy(_zip_name, zip_name); 237} 238 239ClassPathZipEntry::~ClassPathZipEntry() { 240 if (ZipClose != NULL) { 241 (*ZipClose)(_zip); 242 } 243 FREE_C_HEAP_ARRAY(char, _zip_name, mtClass); 244} 245 246ClassFileStream* ClassPathZipEntry::open_stream(const char* name, TRAPS) { 247 // enable call to C land 248 JavaThread* thread = JavaThread::current(); 249 ThreadToNativeFromVM ttn(thread); 250 // check whether zip archive contains name 251 jint filesize, name_len; 252 jzentry* entry = (*FindEntry)(_zip, name, &filesize, &name_len); 253 if (entry == NULL) return NULL; 254 u1* buffer; 255 char name_buf[128]; 256 char* filename; 257 if (name_len < 128) { 258 filename = name_buf; 259 } else { 260 filename = NEW_RESOURCE_ARRAY(char, name_len + 1); 261 } 262 263 // file found, get pointer to class in mmaped jar file. 264 if (ReadMappedEntry == NULL || 265 !(*ReadMappedEntry)(_zip, entry, &buffer, filename)) { 266 // mmaped access not available, perhaps due to compression, 267 // read contents into resource array 268 buffer = NEW_RESOURCE_ARRAY(u1, filesize); 269 if (!(*ReadEntry)(_zip, entry, buffer, filename)) return NULL; 270 } 271 if (UsePerfData) { 272 ClassLoader::perf_sys_classfile_bytes_read()->inc(filesize); 273 } 274 // return result 275 return new ClassFileStream(buffer, filesize, _zip_name); // Resource allocated 276} 277 278// invoke function for each entry in the zip file 279void ClassPathZipEntry::contents_do(void f(const char* name, void* context), void* context) { 280 JavaThread* thread = JavaThread::current(); 281 HandleMark handle_mark(thread); 282 ThreadToNativeFromVM ttn(thread); 283 for (int n = 0; ; n++) { 284 jzentry * ze = ((*GetNextEntry)(_zip, n)); 285 if (ze == NULL) break; 286 (*f)(ze->name, context); 287 } 288} 289 290LazyClassPathEntry::LazyClassPathEntry(char* path, const struct stat* st) : ClassPathEntry() { 291 _path = strdup(path); 292 _st = *st; 293 _meta_index = NULL; 294 _resolved_entry = NULL; 295 _has_error = false; 296} 297 298bool LazyClassPathEntry::is_jar_file() { 299 return ((_st.st_mode & S_IFREG) == S_IFREG); 300} 301 302ClassPathEntry* LazyClassPathEntry::resolve_entry(TRAPS) { 303 if (_resolved_entry != NULL) { 304 return (ClassPathEntry*) _resolved_entry; 305 } 306 ClassPathEntry* new_entry = NULL; 307 new_entry = ClassLoader::create_class_path_entry(_path, &_st, false, CHECK_NULL); 308 { 309 ThreadCritical tc; 310 if (_resolved_entry == NULL) { 311 _resolved_entry = new_entry; 312 return new_entry; 313 } 314 } 315 assert(_resolved_entry != NULL, "bug in MT-safe resolution logic"); 316 delete new_entry; 317 return (ClassPathEntry*) _resolved_entry; 318} 319 320ClassFileStream* LazyClassPathEntry::open_stream(const char* name, TRAPS) { 321 if (_meta_index != NULL && 322 !_meta_index->may_contain(name)) { 323 return NULL; 324 } 325 if (_has_error) { 326 return NULL; 327 } 328 ClassPathEntry* cpe = resolve_entry(THREAD); 329 if (cpe == NULL) { 330 _has_error = true; 331 return NULL; 332 } else { 333 return cpe->open_stream(name, THREAD); 334 } 335} 336 337bool LazyClassPathEntry::is_lazy() { 338 return true; 339} 340 341static void print_meta_index(LazyClassPathEntry* entry, 342 GrowableArray<char*>& meta_packages) { 343 tty->print("[Meta index for %s=", entry->name()); 344 for (int i = 0; i < meta_packages.length(); i++) { 345 if (i > 0) tty->print(" "); 346 tty->print("%s", meta_packages.at(i)); 347 } 348 tty->print_cr("]"); 349} 350 351 352void ClassLoader::setup_meta_index() { 353 // Set up meta index which allows us to open boot jars lazily if 354 // class data sharing is enabled 355 const char* known_version = "% VERSION 2"; 356 char* meta_index_path = Arguments::get_meta_index_path(); 357 char* meta_index_dir = Arguments::get_meta_index_dir(); 358 FILE* file = fopen(meta_index_path, "r"); 359 int line_no = 0; 360 if (file != NULL) { 361 ResourceMark rm; 362 LazyClassPathEntry* cur_entry = NULL; 363 GrowableArray<char*> boot_class_path_packages(10); 364 char package_name[256]; 365 bool skipCurrentJar = false; 366 while (fgets(package_name, sizeof(package_name), file) != NULL) { 367 ++line_no; 368 // Remove trailing newline 369 package_name[strlen(package_name) - 1] = '\0'; 370 switch(package_name[0]) { 371 case '%': 372 { 373 if ((line_no == 1) && (strcmp(package_name, known_version) != 0)) { 374 if (TraceClassLoading && Verbose) { 375 tty->print("[Unsupported meta index version]"); 376 } 377 fclose(file); 378 return; 379 } 380 } 381 382 // These directives indicate jar files which contain only 383 // classes, only non-classfile resources, or a combination of 384 // the two. See src/share/classes/sun/misc/MetaIndex.java and 385 // make/tools/MetaIndex/BuildMetaIndex.java in the J2SE 386 // workspace. 387 case '#': 388 case '!': 389 case '@': 390 { 391 // Hand off current packages to current lazy entry (if any) 392 if ((cur_entry != NULL) && 393 (boot_class_path_packages.length() > 0)) { 394 if (TraceClassLoading && Verbose) { 395 print_meta_index(cur_entry, boot_class_path_packages); 396 } 397 MetaIndex* index = new MetaIndex(boot_class_path_packages.adr_at(0), 398 boot_class_path_packages.length()); 399 cur_entry->set_meta_index(index); 400 } 401 cur_entry = NULL; 402 boot_class_path_packages.clear(); 403 404 // Find lazy entry corresponding to this jar file 405 for (ClassPathEntry* entry = _first_entry; entry != NULL; entry = entry->next()) { 406 if (entry->is_lazy() && 407 string_starts_with(entry->name(), meta_index_dir) && 408 string_ends_with(entry->name(), &package_name[2])) { 409 cur_entry = (LazyClassPathEntry*) entry; 410 break; 411 } 412 } 413 414 // If the first character is '@', it indicates the following jar 415 // file is a resource only jar file in which case, we should skip 416 // reading the subsequent entries since the resource loading is 417 // totally handled by J2SE side. 418 if (package_name[0] == '@') { 419 if (cur_entry != NULL) { 420 cur_entry->set_meta_index(new MetaIndex(NULL, 0)); 421 } 422 cur_entry = NULL; 423 skipCurrentJar = true; 424 } else { 425 skipCurrentJar = false; 426 } 427 428 break; 429 } 430 431 default: 432 { 433 if (!skipCurrentJar && cur_entry != NULL) { 434 char* new_name = strdup(package_name); 435 boot_class_path_packages.append(new_name); 436 } 437 } 438 } 439 } 440 // Hand off current packages to current lazy entry (if any) 441 if ((cur_entry != NULL) && 442 (boot_class_path_packages.length() > 0)) { 443 if (TraceClassLoading && Verbose) { 444 print_meta_index(cur_entry, boot_class_path_packages); 445 } 446 MetaIndex* index = new MetaIndex(boot_class_path_packages.adr_at(0), 447 boot_class_path_packages.length()); 448 cur_entry->set_meta_index(index); 449 } 450 fclose(file); 451 } 452} 453 454void ClassLoader::setup_bootstrap_search_path() { 455 assert(_first_entry == NULL, "should not setup bootstrap class search path twice"); 456 char* sys_class_path = os::strdup(Arguments::get_sysclasspath()); 457 if (TraceClassLoading && Verbose) { 458 tty->print_cr("[Bootstrap loader class path=%s]", sys_class_path); 459 } 460 461 int len = (int)strlen(sys_class_path); 462 int end = 0; 463 464 // Iterate over class path entries 465 for (int start = 0; start < len; start = end) { 466 while (sys_class_path[end] && sys_class_path[end] != os::path_separator()[0]) { 467 end++; 468 } 469 char* path = NEW_C_HEAP_ARRAY(char, end-start+1, mtClass); 470 strncpy(path, &sys_class_path[start], end-start); 471 path[end-start] = '\0'; 472 update_class_path_entry_list(path, false); 473 FREE_C_HEAP_ARRAY(char, path, mtClass); 474 while (sys_class_path[end] == os::path_separator()[0]) { 475 end++; 476 } 477 } 478} 479 480ClassPathEntry* ClassLoader::create_class_path_entry(char *path, const struct stat* st, bool lazy, TRAPS) { 481 JavaThread* thread = JavaThread::current(); 482 if (lazy) { 483 return new LazyClassPathEntry(path, st); 484 } 485 ClassPathEntry* new_entry = NULL; 486 if ((st->st_mode & S_IFREG) == S_IFREG) { 487 // Regular file, should be a zip file 488 // Canonicalized filename 489 char canonical_path[JVM_MAXPATHLEN]; 490 if (!get_canonical_path(path, canonical_path, JVM_MAXPATHLEN)) { 491 // This matches the classic VM 492 THROW_MSG_(vmSymbols::java_io_IOException(), "Bad pathname", NULL); 493 } 494 char* error_msg = NULL; 495 jzfile* zip; 496 { 497 // enable call to C land 498 ThreadToNativeFromVM ttn(thread); 499 HandleMark hm(thread); 500 zip = (*ZipOpen)(canonical_path, &error_msg); 501 } 502 if (zip != NULL && error_msg == NULL) { 503 new_entry = new ClassPathZipEntry(zip, path); 504 if (TraceClassLoading) { 505 tty->print_cr("[Opened %s]", path); 506 } 507 } else { 508 ResourceMark rm(thread); 509 char *msg; 510 if (error_msg == NULL) { 511 msg = NEW_RESOURCE_ARRAY(char, strlen(path) + 128); ; 512 jio_snprintf(msg, strlen(path) + 127, "error in opening JAR file %s", path); 513 } else { 514 int len = (int)(strlen(path) + strlen(error_msg) + 128); 515 msg = NEW_RESOURCE_ARRAY(char, len); ; 516 jio_snprintf(msg, len - 1, "error in opening JAR file <%s> %s", error_msg, path); 517 } 518 THROW_MSG_(vmSymbols::java_lang_ClassNotFoundException(), msg, NULL); 519 } 520 } else { 521 // Directory 522 new_entry = new ClassPathDirEntry(path); 523 if (TraceClassLoading) { 524 tty->print_cr("[Path %s]", path); 525 } 526 } 527 return new_entry; 528} 529 530 531// Create a class path zip entry for a given path (return NULL if not found 532// or zip/JAR file cannot be opened) 533ClassPathZipEntry* ClassLoader::create_class_path_zip_entry(const char *path) { 534 // check for a regular file 535 struct stat st; 536 if (os::stat(path, &st) == 0) { 537 if ((st.st_mode & S_IFREG) == S_IFREG) { 538 char orig_path[JVM_MAXPATHLEN]; 539 char canonical_path[JVM_MAXPATHLEN]; 540 541 strcpy(orig_path, path); 542 if (get_canonical_path(orig_path, canonical_path, JVM_MAXPATHLEN)) { 543 char* error_msg = NULL; 544 jzfile* zip; 545 { 546 // enable call to C land 547 JavaThread* thread = JavaThread::current(); 548 ThreadToNativeFromVM ttn(thread); 549 HandleMark hm(thread); 550 zip = (*ZipOpen)(canonical_path, &error_msg); 551 } 552 if (zip != NULL && error_msg == NULL) { 553 // create using canonical path 554 return new ClassPathZipEntry(zip, canonical_path); 555 } 556 } 557 } 558 } 559 return NULL; 560} 561 562// returns true if entry already on class path 563bool ClassLoader::contains_entry(ClassPathEntry *entry) { 564 ClassPathEntry* e = _first_entry; 565 while (e != NULL) { 566 // assume zip entries have been canonicalized 567 if (strcmp(entry->name(), e->name()) == 0) { 568 return true; 569 } 570 e = e->next(); 571 } 572 return false; 573} 574 575void ClassLoader::add_to_list(ClassPathEntry *new_entry) { 576 if (new_entry != NULL) { 577 if (_last_entry == NULL) { 578 _first_entry = _last_entry = new_entry; 579 } else { 580 _last_entry->set_next(new_entry); 581 _last_entry = new_entry; 582 } 583 } 584} 585 586void ClassLoader::update_class_path_entry_list(char *path, 587 bool check_for_duplicates) { 588 struct stat st; 589 if (os::stat(path, &st) == 0) { 590 // File or directory found 591 ClassPathEntry* new_entry = NULL; 592 Thread* THREAD = Thread::current(); 593 new_entry = create_class_path_entry(path, &st, LazyBootClassLoader, CHECK); 594 // The kernel VM adds dynamically to the end of the classloader path and 595 // doesn't reorder the bootclasspath which would break java.lang.Package 596 // (see PackageInfo). 597 // Add new entry to linked list 598 if (!check_for_duplicates || !contains_entry(new_entry)) { 599 add_to_list(new_entry); 600 } 601 } 602} 603 604void ClassLoader::print_bootclasspath() { 605 ClassPathEntry* e = _first_entry; 606 tty->print("[bootclasspath= "); 607 while (e != NULL) { 608 tty->print("%s ;", e->name()); 609 e = e->next(); 610 } 611 tty->print_cr("]"); 612} 613 614void ClassLoader::load_zip_library() { 615 assert(ZipOpen == NULL, "should not load zip library twice"); 616 // First make sure native library is loaded 617 os::native_java_library(); 618 // Load zip library 619 char path[JVM_MAXPATHLEN]; 620 char ebuf[1024]; 621 void* handle = NULL; 622 if (os::dll_build_name(path, sizeof(path), Arguments::get_dll_dir(), "zip")) { 623 handle = os::dll_load(path, ebuf, sizeof ebuf); 624 } 625 if (handle == NULL) { 626 vm_exit_during_initialization("Unable to load ZIP library", path); 627 } 628 // Lookup zip entry points 629 ZipOpen = CAST_TO_FN_PTR(ZipOpen_t, os::dll_lookup(handle, "ZIP_Open")); 630 ZipClose = CAST_TO_FN_PTR(ZipClose_t, os::dll_lookup(handle, "ZIP_Close")); 631 FindEntry = CAST_TO_FN_PTR(FindEntry_t, os::dll_lookup(handle, "ZIP_FindEntry")); 632 ReadEntry = CAST_TO_FN_PTR(ReadEntry_t, os::dll_lookup(handle, "ZIP_ReadEntry")); 633 ReadMappedEntry = CAST_TO_FN_PTR(ReadMappedEntry_t, os::dll_lookup(handle, "ZIP_ReadMappedEntry")); 634 GetNextEntry = CAST_TO_FN_PTR(GetNextEntry_t, os::dll_lookup(handle, "ZIP_GetNextEntry")); 635 636 // ZIP_Close is not exported on Windows in JDK5.0 so don't abort if ZIP_Close is NULL 637 if (ZipOpen == NULL || FindEntry == NULL || ReadEntry == NULL || GetNextEntry == NULL) { 638 vm_exit_during_initialization("Corrupted ZIP library", path); 639 } 640 641 // Lookup canonicalize entry in libjava.dll 642 void *javalib_handle = os::native_java_library(); 643 CanonicalizeEntry = CAST_TO_FN_PTR(canonicalize_fn_t, os::dll_lookup(javalib_handle, "Canonicalize")); 644 // This lookup only works on 1.3. Do not check for non-null here 645} 646 647// PackageInfo data exists in order to support the java.lang.Package 648// class. A Package object provides information about a java package 649// (version, vendor, etc.) which originates in the manifest of the jar 650// file supplying the package. For application classes, the ClassLoader 651// object takes care of this. 652 653// For system (boot) classes, the Java code in the Package class needs 654// to be able to identify which source jar file contained the boot 655// class, so that it can extract the manifest from it. This table 656// identifies java packages with jar files in the boot classpath. 657 658// Because the boot classpath cannot change, the classpath index is 659// sufficient to identify the source jar file or directory. (Since 660// directories have no manifests, the directory name is not required, 661// but is available.) 662 663// When using sharing -- the pathnames of entries in the boot classpath 664// may not be the same at runtime as they were when the archive was 665// created (NFS, Samba, etc.). The actual files and directories named 666// in the classpath must be the same files, in the same order, even 667// though the exact name is not the same. 668 669class PackageInfo: public BasicHashtableEntry<mtClass> { 670public: 671 const char* _pkgname; // Package name 672 int _classpath_index; // Index of directory or JAR file loaded from 673 674 PackageInfo* next() { 675 return (PackageInfo*)BasicHashtableEntry<mtClass>::next(); 676 } 677 678 const char* pkgname() { return _pkgname; } 679 void set_pkgname(char* pkgname) { _pkgname = pkgname; } 680 681 const char* filename() { 682 return ClassLoader::classpath_entry(_classpath_index)->name(); 683 } 684 685 void set_index(int index) { 686 _classpath_index = index; 687 } 688}; 689 690 691class PackageHashtable : public BasicHashtable<mtClass> { 692private: 693 inline unsigned int compute_hash(const char *s, int n) { 694 unsigned int val = 0; 695 while (--n >= 0) { 696 val = *s++ + 31 * val; 697 } 698 return val; 699 } 700 701 PackageInfo* bucket(int index) { 702 return (PackageInfo*)BasicHashtable<mtClass>::bucket(index); 703 } 704 705 PackageInfo* get_entry(int index, unsigned int hash, 706 const char* pkgname, size_t n) { 707 for (PackageInfo* pp = bucket(index); pp != NULL; pp = pp->next()) { 708 if (pp->hash() == hash && 709 strncmp(pkgname, pp->pkgname(), n) == 0 && 710 pp->pkgname()[n] == '\0') { 711 return pp; 712 } 713 } 714 return NULL; 715 } 716 717public: 718 PackageHashtable(int table_size) 719 : BasicHashtable<mtClass>(table_size, sizeof(PackageInfo)) {} 720 721 PackageHashtable(int table_size, HashtableBucket<mtClass>* t, int number_of_entries) 722 : BasicHashtable<mtClass>(table_size, sizeof(PackageInfo), t, number_of_entries) {} 723 724 PackageInfo* get_entry(const char* pkgname, int n) { 725 unsigned int hash = compute_hash(pkgname, n); 726 return get_entry(hash_to_index(hash), hash, pkgname, n); 727 } 728 729 PackageInfo* new_entry(char* pkgname, int n) { 730 unsigned int hash = compute_hash(pkgname, n); 731 PackageInfo* pp; 732 pp = (PackageInfo*)BasicHashtable<mtClass>::new_entry(hash); 733 pp->set_pkgname(pkgname); 734 return pp; 735 } 736 737 void add_entry(PackageInfo* pp) { 738 int index = hash_to_index(pp->hash()); 739 BasicHashtable<mtClass>::add_entry(index, pp); 740 } 741 742 void copy_pkgnames(const char** packages) { 743 int n = 0; 744 for (int i = 0; i < table_size(); ++i) { 745 for (PackageInfo* pp = bucket(i); pp != NULL; pp = pp->next()) { 746 packages[n++] = pp->pkgname(); 747 } 748 } 749 assert(n == number_of_entries(), "just checking"); 750 } 751 752 void copy_table(char** top, char* end, PackageHashtable* table); 753}; 754 755 756void PackageHashtable::copy_table(char** top, char* end, 757 PackageHashtable* table) { 758 // Copy (relocate) the table to the shared space. 759 BasicHashtable<mtClass>::copy_table(top, end); 760 761 // Calculate the space needed for the package name strings. 762 int i; 763 int n = 0; 764 for (i = 0; i < table_size(); ++i) { 765 for (PackageInfo* pp = table->bucket(i); 766 pp != NULL; 767 pp = pp->next()) { 768 n += (int)(strlen(pp->pkgname()) + 1); 769 } 770 } 771 if (*top + n + sizeof(intptr_t) >= end) { 772 report_out_of_shared_space(SharedMiscData); 773 } 774 775 // Copy the table data (the strings) to the shared space. 776 n = align_size_up(n, sizeof(HeapWord)); 777 *(intptr_t*)(*top) = n; 778 *top += sizeof(intptr_t); 779 780 for (i = 0; i < table_size(); ++i) { 781 for (PackageInfo* pp = table->bucket(i); 782 pp != NULL; 783 pp = pp->next()) { 784 int n1 = (int)(strlen(pp->pkgname()) + 1); 785 pp->set_pkgname((char*)memcpy(*top, pp->pkgname(), n1)); 786 *top += n1; 787 } 788 } 789 *top = (char*)align_size_up((intptr_t)*top, sizeof(HeapWord)); 790} 791 792 793void ClassLoader::copy_package_info_buckets(char** top, char* end) { 794 _package_hash_table->copy_buckets(top, end); 795} 796 797void ClassLoader::copy_package_info_table(char** top, char* end) { 798 _package_hash_table->copy_table(top, end, _package_hash_table); 799} 800 801 802PackageInfo* ClassLoader::lookup_package(const char *pkgname) { 803 const char *cp = strrchr(pkgname, '/'); 804 if (cp != NULL) { 805 // Package prefix found 806 int n = cp - pkgname + 1; 807 return _package_hash_table->get_entry(pkgname, n); 808 } 809 return NULL; 810} 811 812 813bool ClassLoader::add_package(const char *pkgname, int classpath_index, TRAPS) { 814 assert(pkgname != NULL, "just checking"); 815 // Bootstrap loader no longer holds system loader lock obj serializing 816 // load_instance_class and thereby add_package 817 { 818 MutexLocker ml(PackageTable_lock, THREAD); 819 // First check for previously loaded entry 820 PackageInfo* pp = lookup_package(pkgname); 821 if (pp != NULL) { 822 // Existing entry found, check source of package 823 pp->set_index(classpath_index); 824 return true; 825 } 826 827 const char *cp = strrchr(pkgname, '/'); 828 if (cp != NULL) { 829 // Package prefix found 830 int n = cp - pkgname + 1; 831 832 char* new_pkgname = NEW_C_HEAP_ARRAY(char, n + 1, mtClass); 833 if (new_pkgname == NULL) { 834 return false; 835 } 836 837 memcpy(new_pkgname, pkgname, n); 838 new_pkgname[n] = '\0'; 839 pp = _package_hash_table->new_entry(new_pkgname, n); 840 pp->set_index(classpath_index); 841 842 // Insert into hash table 843 _package_hash_table->add_entry(pp); 844 } 845 return true; 846 } 847} 848 849 850oop ClassLoader::get_system_package(const char* name, TRAPS) { 851 PackageInfo* pp; 852 { 853 MutexLocker ml(PackageTable_lock, THREAD); 854 pp = lookup_package(name); 855 } 856 if (pp == NULL) { 857 return NULL; 858 } else { 859 Handle p = java_lang_String::create_from_str(pp->filename(), THREAD); 860 return p(); 861 } 862} 863 864 865objArrayOop ClassLoader::get_system_packages(TRAPS) { 866 ResourceMark rm(THREAD); 867 int nof_entries; 868 const char** packages; 869 { 870 MutexLocker ml(PackageTable_lock, THREAD); 871 // Allocate resource char* array containing package names 872 nof_entries = _package_hash_table->number_of_entries(); 873 if ((packages = NEW_RESOURCE_ARRAY(const char*, nof_entries)) == NULL) { 874 return NULL; 875 } 876 _package_hash_table->copy_pkgnames(packages); 877 } 878 // Allocate objArray and fill with java.lang.String 879 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(), 880 nof_entries, CHECK_0); 881 objArrayHandle result(THREAD, r); 882 for (int i = 0; i < nof_entries; i++) { 883 Handle str = java_lang_String::create_from_str(packages[i], CHECK_0); 884 result->obj_at_put(i, str()); 885 } 886 887 return result(); 888} 889 890 891instanceKlassHandle ClassLoader::load_classfile(Symbol* h_name, TRAPS) { 892 ResourceMark rm(THREAD); 893 EventMark m("loading class %s", h_name->as_C_string()); 894 ThreadProfilerMark tpm(ThreadProfilerMark::classLoaderRegion); 895 896 stringStream st; 897 // st.print() uses too much stack space while handling a StackOverflowError 898 // st.print("%s.class", h_name->as_utf8()); 899 st.print_raw(h_name->as_utf8()); 900 st.print_raw(".class"); 901 char* name = st.as_string(); 902 903 // Lookup stream for parsing .class file 904 ClassFileStream* stream = NULL; 905 int classpath_index = 0; 906 { 907 PerfClassTraceTime vmtimer(perf_sys_class_lookup_time(), 908 ((JavaThread*) THREAD)->get_thread_stat()->perf_timers_addr(), 909 PerfClassTraceTime::CLASS_LOAD); 910 ClassPathEntry* e = _first_entry; 911 while (e != NULL) { 912 stream = e->open_stream(name, CHECK_NULL); 913 if (stream != NULL) { 914 break; 915 } 916 e = e->next(); 917 ++classpath_index; 918 } 919 } 920 921 instanceKlassHandle h; 922 if (stream != NULL) { 923 924 // class file found, parse it 925 ClassFileParser parser(stream); 926 ClassLoaderData* loader_data = ClassLoaderData::the_null_class_loader_data(); 927 Handle protection_domain; 928 TempNewSymbol parsed_name = NULL; 929 instanceKlassHandle result = parser.parseClassFile(h_name, 930 loader_data, 931 protection_domain, 932 parsed_name, 933 false, 934 CHECK_(h)); 935 936 // add to package table 937 if (add_package(name, classpath_index, THREAD)) { 938 h = result; 939 } 940 } 941 942 return h; 943} 944 945 946void ClassLoader::create_package_info_table(HashtableBucket<mtClass> *t, int length, 947 int number_of_entries) { 948 assert(_package_hash_table == NULL, "One package info table allowed."); 949 assert(length == package_hash_table_size * sizeof(HashtableBucket<mtClass>), 950 "bad shared package info size."); 951 _package_hash_table = new PackageHashtable(package_hash_table_size, t, 952 number_of_entries); 953} 954 955 956void ClassLoader::create_package_info_table() { 957 assert(_package_hash_table == NULL, "shouldn't have one yet"); 958 _package_hash_table = new PackageHashtable(package_hash_table_size); 959} 960 961 962// Initialize the class loader's access to methods in libzip. Parse and 963// process the boot classpath into a list ClassPathEntry objects. Once 964// this list has been created, it must not change order (see class PackageInfo) 965// it can be appended to and is by jvmti and the kernel vm. 966 967void ClassLoader::initialize() { 968 assert(_package_hash_table == NULL, "should have been initialized by now."); 969 EXCEPTION_MARK; 970 971 if (UsePerfData) { 972 // jvmstat performance counters 973 NEWPERFTICKCOUNTER(_perf_accumulated_time, SUN_CLS, "time"); 974 NEWPERFTICKCOUNTER(_perf_class_init_time, SUN_CLS, "classInitTime"); 975 NEWPERFTICKCOUNTER(_perf_class_init_selftime, SUN_CLS, "classInitTime.self"); 976 NEWPERFTICKCOUNTER(_perf_class_verify_time, SUN_CLS, "classVerifyTime"); 977 NEWPERFTICKCOUNTER(_perf_class_verify_selftime, SUN_CLS, "classVerifyTime.self"); 978 NEWPERFTICKCOUNTER(_perf_class_link_time, SUN_CLS, "classLinkedTime"); 979 NEWPERFTICKCOUNTER(_perf_class_link_selftime, SUN_CLS, "classLinkedTime.self"); 980 NEWPERFEVENTCOUNTER(_perf_classes_inited, SUN_CLS, "initializedClasses"); 981 NEWPERFEVENTCOUNTER(_perf_classes_linked, SUN_CLS, "linkedClasses"); 982 NEWPERFEVENTCOUNTER(_perf_classes_verified, SUN_CLS, "verifiedClasses"); 983 984 NEWPERFTICKCOUNTER(_perf_class_parse_time, SUN_CLS, "parseClassTime"); 985 NEWPERFTICKCOUNTER(_perf_class_parse_selftime, SUN_CLS, "parseClassTime.self"); 986 NEWPERFTICKCOUNTER(_perf_sys_class_lookup_time, SUN_CLS, "lookupSysClassTime"); 987 NEWPERFTICKCOUNTER(_perf_shared_classload_time, SUN_CLS, "sharedClassLoadTime"); 988 NEWPERFTICKCOUNTER(_perf_sys_classload_time, SUN_CLS, "sysClassLoadTime"); 989 NEWPERFTICKCOUNTER(_perf_app_classload_time, SUN_CLS, "appClassLoadTime"); 990 NEWPERFTICKCOUNTER(_perf_app_classload_selftime, SUN_CLS, "appClassLoadTime.self"); 991 NEWPERFEVENTCOUNTER(_perf_app_classload_count, SUN_CLS, "appClassLoadCount"); 992 NEWPERFTICKCOUNTER(_perf_define_appclasses, SUN_CLS, "defineAppClasses"); 993 NEWPERFTICKCOUNTER(_perf_define_appclass_time, SUN_CLS, "defineAppClassTime"); 994 NEWPERFTICKCOUNTER(_perf_define_appclass_selftime, SUN_CLS, "defineAppClassTime.self"); 995 NEWPERFBYTECOUNTER(_perf_app_classfile_bytes_read, SUN_CLS, "appClassBytes"); 996 NEWPERFBYTECOUNTER(_perf_sys_classfile_bytes_read, SUN_CLS, "sysClassBytes"); 997 998 999 // The following performance counters are added for measuring the impact 1000 // of the bug fix of 6365597. They are mainly focused on finding out 1001 // the behavior of system & user-defined classloader lock, whether 1002 // ClassLoader.loadClass/findClass is being called synchronized or not. 1003 // Also two additional counters are created to see whether 'UnsyncloadClass' 1004 // flag is being set or not and how many times load_instance_class call 1005 // fails with linkageError etc. 1006 NEWPERFEVENTCOUNTER(_sync_systemLoaderLockContentionRate, SUN_CLS, 1007 "systemLoaderLockContentionRate"); 1008 NEWPERFEVENTCOUNTER(_sync_nonSystemLoaderLockContentionRate, SUN_CLS, 1009 "nonSystemLoaderLockContentionRate"); 1010 NEWPERFEVENTCOUNTER(_sync_JVMFindLoadedClassLockFreeCounter, SUN_CLS, 1011 "jvmFindLoadedClassNoLockCalls"); 1012 NEWPERFEVENTCOUNTER(_sync_JVMDefineClassLockFreeCounter, SUN_CLS, 1013 "jvmDefineClassNoLockCalls"); 1014 1015 NEWPERFEVENTCOUNTER(_sync_JNIDefineClassLockFreeCounter, SUN_CLS, 1016 "jniDefineClassNoLockCalls"); 1017 1018 NEWPERFEVENTCOUNTER(_unsafe_defineClassCallCounter, SUN_CLS, 1019 "unsafeDefineClassCalls"); 1020 1021 NEWPERFEVENTCOUNTER(_isUnsyncloadClass, SUN_CLS, "isUnsyncloadClassSet"); 1022 NEWPERFEVENTCOUNTER(_load_instance_class_failCounter, SUN_CLS, 1023 "loadInstanceClassFailRate"); 1024 1025 // increment the isUnsyncloadClass counter if UnsyncloadClass is set. 1026 if (UnsyncloadClass) { 1027 _isUnsyncloadClass->inc(); 1028 } 1029 } 1030 1031 // lookup zip library entry points 1032 load_zip_library(); 1033 // initialize search path 1034 setup_bootstrap_search_path(); 1035 if (LazyBootClassLoader) { 1036 // set up meta index which makes boot classpath initialization lazier 1037 setup_meta_index(); 1038 } 1039} 1040 1041 1042jlong ClassLoader::classloader_time_ms() { 1043 return UsePerfData ? 1044 Management::ticks_to_ms(_perf_accumulated_time->get_value()) : -1; 1045} 1046 1047jlong ClassLoader::class_init_count() { 1048 return UsePerfData ? _perf_classes_inited->get_value() : -1; 1049} 1050 1051jlong ClassLoader::class_init_time_ms() { 1052 return UsePerfData ? 1053 Management::ticks_to_ms(_perf_class_init_time->get_value()) : -1; 1054} 1055 1056jlong ClassLoader::class_verify_time_ms() { 1057 return UsePerfData ? 1058 Management::ticks_to_ms(_perf_class_verify_time->get_value()) : -1; 1059} 1060 1061jlong ClassLoader::class_link_count() { 1062 return UsePerfData ? _perf_classes_linked->get_value() : -1; 1063} 1064 1065jlong ClassLoader::class_link_time_ms() { 1066 return UsePerfData ? 1067 Management::ticks_to_ms(_perf_class_link_time->get_value()) : -1; 1068} 1069 1070int ClassLoader::compute_Object_vtable() { 1071 // hardwired for JDK1.2 -- would need to duplicate class file parsing 1072 // code to determine actual value from file 1073 // Would be value '11' if finals were in vtable 1074 int JDK_1_2_Object_vtable_size = 5; 1075 return JDK_1_2_Object_vtable_size * vtableEntry::size(); 1076} 1077 1078 1079void classLoader_init() { 1080 ClassLoader::initialize(); 1081} 1082 1083 1084bool ClassLoader::get_canonical_path(char* orig, char* out, int len) { 1085 assert(orig != NULL && out != NULL && len > 0, "bad arguments"); 1086 if (CanonicalizeEntry != NULL) { 1087 JNIEnv* env = JavaThread::current()->jni_environment(); 1088 if ((CanonicalizeEntry)(env, os::native_path(orig), out, len) < 0) { 1089 return false; 1090 } 1091 } else { 1092 // On JDK 1.2.2 the Canonicalize does not exist, so just do nothing 1093 strncpy(out, orig, len); 1094 out[len - 1] = '\0'; 1095 } 1096 return true; 1097} 1098 1099#ifndef PRODUCT 1100 1101void ClassLoader::verify() { 1102 _package_hash_table->verify(); 1103} 1104 1105 1106// CompileTheWorld 1107// 1108// Iterates over all class path entries and forces compilation of all methods 1109// in all classes found. Currently, only zip/jar archives are searched. 1110// 1111// The classes are loaded by the Java level bootstrap class loader, and the 1112// initializer is called. If DelayCompilationDuringStartup is true (default), 1113// the interpreter will run the initialization code. Note that forcing 1114// initialization in this way could potentially lead to initialization order 1115// problems, in which case we could just force the initialization bit to be set. 1116 1117 1118// We need to iterate over the contents of a zip/jar file, so we replicate the 1119// jzcell and jzfile definitions from zip_util.h but rename jzfile to real_jzfile, 1120// since jzfile already has a void* definition. 1121// 1122// Note that this is only used in debug mode. 1123// 1124// HotSpot integration note: 1125// Matches zip_util.h 1.14 99/06/01 from jdk1.3 beta H build 1126 1127 1128// JDK 1.3 version 1129typedef struct real_jzentry13 { /* Zip file entry */ 1130 char *name; /* entry name */ 1131 jint time; /* modification time */ 1132 jint size; /* size of uncompressed data */ 1133 jint csize; /* size of compressed data (zero if uncompressed) */ 1134 jint crc; /* crc of uncompressed data */ 1135 char *comment; /* optional zip file comment */ 1136 jbyte *extra; /* optional extra data */ 1137 jint pos; /* position of LOC header (if negative) or data */ 1138} real_jzentry13; 1139 1140typedef struct real_jzfile13 { /* Zip file */ 1141 char *name; /* zip file name */ 1142 jint refs; /* number of active references */ 1143 jint fd; /* open file descriptor */ 1144 void *lock; /* read lock */ 1145 char *comment; /* zip file comment */ 1146 char *msg; /* zip error message */ 1147 void *entries; /* array of hash cells */ 1148 jint total; /* total number of entries */ 1149 unsigned short *table; /* Hash chain heads: indexes into entries */ 1150 jint tablelen; /* number of hash eads */ 1151 real_jzfile13 *next; /* next zip file in search list */ 1152 jzentry *cache; /* we cache the most recently freed jzentry */ 1153 /* Information on metadata names in META-INF directory */ 1154 char **metanames; /* array of meta names (may have null names) */ 1155 jint metacount; /* number of slots in metanames array */ 1156 /* If there are any per-entry comments, they are in the comments array */ 1157 char **comments; 1158} real_jzfile13; 1159 1160// JDK 1.2 version 1161typedef struct real_jzentry12 { /* Zip file entry */ 1162 char *name; /* entry name */ 1163 jint time; /* modification time */ 1164 jint size; /* size of uncompressed data */ 1165 jint csize; /* size of compressed data (zero if uncompressed) */ 1166 jint crc; /* crc of uncompressed data */ 1167 char *comment; /* optional zip file comment */ 1168 jbyte *extra; /* optional extra data */ 1169 jint pos; /* position of LOC header (if negative) or data */ 1170 struct real_jzentry12 *next; /* next entry in hash table */ 1171} real_jzentry12; 1172 1173typedef struct real_jzfile12 { /* Zip file */ 1174 char *name; /* zip file name */ 1175 jint refs; /* number of active references */ 1176 jint fd; /* open file descriptor */ 1177 void *lock; /* read lock */ 1178 char *comment; /* zip file comment */ 1179 char *msg; /* zip error message */ 1180 real_jzentry12 *entries; /* array of zip entries */ 1181 jint total; /* total number of entries */ 1182 real_jzentry12 **table; /* hash table of entries */ 1183 jint tablelen; /* number of buckets */ 1184 jzfile *next; /* next zip file in search list */ 1185} real_jzfile12; 1186 1187 1188void ClassPathDirEntry::compile_the_world(Handle loader, TRAPS) { 1189 // For now we only compile all methods in all classes in zip/jar files 1190 tty->print_cr("CompileTheWorld : Skipped classes in %s", _dir); 1191 tty->cr(); 1192} 1193 1194 1195bool ClassPathDirEntry::is_rt_jar() { 1196 return false; 1197} 1198 1199void ClassPathZipEntry::compile_the_world(Handle loader, TRAPS) { 1200 if (JDK_Version::is_jdk12x_version()) { 1201 compile_the_world12(loader, THREAD); 1202 } else { 1203 compile_the_world13(loader, THREAD); 1204 } 1205 if (HAS_PENDING_EXCEPTION) { 1206 if (PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())) { 1207 CLEAR_PENDING_EXCEPTION; 1208 tty->print_cr("\nCompileTheWorld : Ran out of memory\n"); 1209 tty->print_cr("Increase class metadata storage if a limit was set"); 1210 } else { 1211 tty->print_cr("\nCompileTheWorld : Unexpected exception occurred\n"); 1212 } 1213 } 1214} 1215 1216// Version that works for JDK 1.3.x 1217void ClassPathZipEntry::compile_the_world13(Handle loader, TRAPS) { 1218 real_jzfile13* zip = (real_jzfile13*) _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_jzentry13 * ze = (real_jzentry13 *)((*GetNextEntry)(_zip, n)); 1224 if (ze == NULL) break; 1225 ClassLoader::compile_the_world_in(ze->name, loader, CHECK); 1226 } 1227} 1228 1229 1230// Version that works for JDK 1.2.x 1231void ClassPathZipEntry::compile_the_world12(Handle loader, TRAPS) { 1232 real_jzfile12* zip = (real_jzfile12*) _zip; 1233 tty->print_cr("CompileTheWorld : Compiling all classes in %s", zip->name); 1234 tty->cr(); 1235 // Iterate over all entries in zip file 1236 for (int n = 0; ; n++) { 1237 real_jzentry12 * ze = (real_jzentry12 *)((*GetNextEntry)(_zip, n)); 1238 if (ze == NULL) break; 1239 ClassLoader::compile_the_world_in(ze->name, loader, CHECK); 1240 } 1241} 1242 1243bool ClassPathZipEntry::is_rt_jar() { 1244 if (JDK_Version::is_jdk12x_version()) { 1245 return is_rt_jar12(); 1246 } else { 1247 return is_rt_jar13(); 1248 } 1249} 1250 1251// JDK 1.3 version 1252bool ClassPathZipEntry::is_rt_jar13() { 1253 real_jzfile13* zip = (real_jzfile13*) _zip; 1254 int len = (int)strlen(zip->name); 1255 // Check whether zip name ends in "rt.jar" 1256 // This will match other archives named rt.jar as well, but this is 1257 // only used for debugging. 1258 return (len >= 6) && (strcasecmp(zip->name + len - 6, "rt.jar") == 0); 1259} 1260 1261// JDK 1.2 version 1262bool ClassPathZipEntry::is_rt_jar12() { 1263 real_jzfile12* zip = (real_jzfile12*) _zip; 1264 int len = (int)strlen(zip->name); 1265 // Check whether zip name ends in "rt.jar" 1266 // This will match other archives named rt.jar as well, but this is 1267 // only used for debugging. 1268 return (len >= 6) && (strcasecmp(zip->name + len - 6, "rt.jar") == 0); 1269} 1270 1271void LazyClassPathEntry::compile_the_world(Handle loader, TRAPS) { 1272 ClassPathEntry* cpe = resolve_entry(THREAD); 1273 if (cpe != NULL) { 1274 cpe->compile_the_world(loader, CHECK); 1275 } 1276} 1277 1278bool LazyClassPathEntry::is_rt_jar() { 1279 Thread* THREAD = Thread::current(); 1280 ClassPathEntry* cpe = resolve_entry(THREAD); 1281 return (cpe != NULL) ? cpe->is_jar_file() : false; 1282} 1283 1284void ClassLoader::compile_the_world() { 1285 EXCEPTION_MARK; 1286 HandleMark hm(THREAD); 1287 ResourceMark rm(THREAD); 1288 // Make sure we don't run with background compilation 1289 BackgroundCompilation = false; 1290 // Find bootstrap loader 1291 Handle system_class_loader (THREAD, SystemDictionary::java_system_loader()); 1292 // Iterate over all bootstrap class path entries 1293 ClassPathEntry* e = _first_entry; 1294 jlong start = os::javaTimeMillis(); 1295 while (e != NULL) { 1296 // We stop at rt.jar, unless it is the first bootstrap path entry 1297 if (e->is_rt_jar() && e != _first_entry) break; 1298 e->compile_the_world(system_class_loader, CATCH); 1299 e = e->next(); 1300 } 1301 jlong end = os::javaTimeMillis(); 1302 tty->print_cr("CompileTheWorld : Done (%d classes, %d methods, " JLONG_FORMAT " ms)", 1303 _compile_the_world_class_counter, _compile_the_world_method_counter, (end - start)); 1304 { 1305 // Print statistics as if before normal exit: 1306 extern void print_statistics(); 1307 print_statistics(); 1308 } 1309 vm_exit(0); 1310} 1311 1312int ClassLoader::_compile_the_world_class_counter = 0; 1313int ClassLoader::_compile_the_world_method_counter = 0; 1314static int _codecache_sweep_counter = 0; 1315 1316// Filter out all exceptions except OOMs 1317static void clear_pending_exception_if_not_oom(TRAPS) { 1318 if (HAS_PENDING_EXCEPTION && 1319 !PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())) { 1320 CLEAR_PENDING_EXCEPTION; 1321 } 1322 // The CHECK at the caller will propagate the exception out 1323} 1324 1325/** 1326 * Returns if the given method should be compiled when doing compile-the-world. 1327 * 1328 * TODO: This should be a private method in a CompileTheWorld class. 1329 */ 1330static bool can_be_compiled(methodHandle m, int comp_level) { 1331 assert(CompileTheWorld, "must be"); 1332 1333 // It's not valid to compile a native wrapper for MethodHandle methods 1334 // that take a MemberName appendix since the bytecode signature is not 1335 // correct. 1336 vmIntrinsics::ID iid = m->intrinsic_id(); 1337 if (MethodHandles::is_signature_polymorphic(iid) && MethodHandles::has_member_arg(iid)) { 1338 return false; 1339 } 1340 1341 return CompilationPolicy::can_be_compiled(m, comp_level); 1342} 1343 1344void ClassLoader::compile_the_world_in(char* name, Handle loader, TRAPS) { 1345 int len = (int)strlen(name); 1346 if (len > 6 && strcmp(".class", name + len - 6) == 0) { 1347 // We have a .class file 1348 char buffer[2048]; 1349 strncpy(buffer, name, len - 6); 1350 buffer[len-6] = 0; 1351 // If the file has a period after removing .class, it's not really a 1352 // valid class file. The class loader will check everything else. 1353 if (strchr(buffer, '.') == NULL) { 1354 _compile_the_world_class_counter++; 1355 if (_compile_the_world_class_counter > CompileTheWorldStopAt) return; 1356 1357 // Construct name without extension 1358 TempNewSymbol sym = SymbolTable::new_symbol(buffer, CHECK); 1359 // Use loader to load and initialize class 1360 Klass* ik = SystemDictionary::resolve_or_null(sym, loader, Handle(), THREAD); 1361 instanceKlassHandle k (THREAD, ik); 1362 if (k.not_null() && !HAS_PENDING_EXCEPTION) { 1363 k->initialize(THREAD); 1364 } 1365 bool exception_occurred = HAS_PENDING_EXCEPTION; 1366 clear_pending_exception_if_not_oom(CHECK); 1367 if (CompileTheWorldPreloadClasses && k.not_null()) { 1368 ConstantPool::preload_and_initialize_all_classes(k->constants(), THREAD); 1369 if (HAS_PENDING_EXCEPTION) { 1370 // If something went wrong in preloading we just ignore it 1371 clear_pending_exception_if_not_oom(CHECK); 1372 tty->print_cr("Preloading failed for (%d) %s", _compile_the_world_class_counter, buffer); 1373 } 1374 } 1375 1376 if (_compile_the_world_class_counter >= CompileTheWorldStartAt) { 1377 if (k.is_null() || exception_occurred) { 1378 // If something went wrong (e.g. ExceptionInInitializerError) we skip this class 1379 tty->print_cr("CompileTheWorld (%d) : Skipping %s", _compile_the_world_class_counter, buffer); 1380 } else { 1381 tty->print_cr("CompileTheWorld (%d) : %s", _compile_the_world_class_counter, buffer); 1382 // Preload all classes to get around uncommon traps 1383 // Iterate over all methods in class 1384 int comp_level = CompilationPolicy::policy()->initial_compile_level(); 1385 for (int n = 0; n < k->methods()->length(); n++) { 1386 methodHandle m (THREAD, k->methods()->at(n)); 1387 if (can_be_compiled(m, comp_level)) { 1388 if (++_codecache_sweep_counter == CompileTheWorldSafepointInterval) { 1389 // Give sweeper a chance to keep up with CTW 1390 VM_ForceSafepoint op; 1391 VMThread::execute(&op); 1392 _codecache_sweep_counter = 0; 1393 } 1394 // Force compilation 1395 CompileBroker::compile_method(m, InvocationEntryBci, comp_level, 1396 methodHandle(), 0, "CTW", THREAD); 1397 if (HAS_PENDING_EXCEPTION) { 1398 clear_pending_exception_if_not_oom(CHECK); 1399 tty->print_cr("CompileTheWorld (%d) : Skipping method: %s", _compile_the_world_class_counter, m->name_and_sig_as_C_string()); 1400 } else { 1401 _compile_the_world_method_counter++; 1402 } 1403 if (TieredCompilation && TieredStopAtLevel >= CompLevel_full_optimization) { 1404 // Clobber the first compile and force second tier compilation 1405 nmethod* nm = m->code(); 1406 if (nm != NULL) { 1407 // Throw out the code so that the code cache doesn't fill up 1408 nm->make_not_entrant(); 1409 m->clear_code(); 1410 } 1411 CompileBroker::compile_method(m, InvocationEntryBci, CompLevel_full_optimization, 1412 methodHandle(), 0, "CTW", THREAD); 1413 if (HAS_PENDING_EXCEPTION) { 1414 clear_pending_exception_if_not_oom(CHECK); 1415 tty->print_cr("CompileTheWorld (%d) : Skipping method: %s", _compile_the_world_class_counter, m->name_and_sig_as_C_string()); 1416 } else { 1417 _compile_the_world_method_counter++; 1418 } 1419 } 1420 } else { 1421 tty->print_cr("CompileTheWorld (%d) : Skipping method: %s", _compile_the_world_class_counter, m->name_and_sig_as_C_string()); 1422 } 1423 1424 nmethod* nm = m->code(); 1425 if (nm != NULL) { 1426 // Throw out the code so that the code cache doesn't fill up 1427 nm->make_not_entrant(); 1428 m->clear_code(); 1429 } 1430 } 1431 } 1432 } 1433 } 1434 } 1435} 1436 1437#endif //PRODUCT 1438 1439// Please keep following two functions at end of this file. With them placed at top or in middle of the file, 1440// they could get inlined by agressive compiler, an unknown trick, see bug 6966589. 1441void PerfClassTraceTime::initialize() { 1442 if (!UsePerfData) return; 1443 1444 if (_eventp != NULL) { 1445 // increment the event counter 1446 _eventp->inc(); 1447 } 1448 1449 // stop the current active thread-local timer to measure inclusive time 1450 _prev_active_event = -1; 1451 for (int i=0; i < EVENT_TYPE_COUNT; i++) { 1452 if (_timers[i].is_active()) { 1453 assert(_prev_active_event == -1, "should have only one active timer"); 1454 _prev_active_event = i; 1455 _timers[i].stop(); 1456 } 1457 } 1458 1459 if (_recursion_counters == NULL || (_recursion_counters[_event_type])++ == 0) { 1460 // start the inclusive timer if not recursively called 1461 _t.start(); 1462 } 1463 1464 // start thread-local timer of the given event type 1465 if (!_timers[_event_type].is_active()) { 1466 _timers[_event_type].start(); 1467 } 1468} 1469 1470PerfClassTraceTime::~PerfClassTraceTime() { 1471 if (!UsePerfData) return; 1472 1473 // stop the thread-local timer as the event completes 1474 // and resume the thread-local timer of the event next on the stack 1475 _timers[_event_type].stop(); 1476 jlong selftime = _timers[_event_type].ticks(); 1477 1478 if (_prev_active_event >= 0) { 1479 _timers[_prev_active_event].start(); 1480 } 1481 1482 if (_recursion_counters != NULL && --(_recursion_counters[_event_type]) > 0) return; 1483 1484 // increment the counters only on the leaf call 1485 _t.stop(); 1486 _timep->inc(_t.ticks()); 1487 if (_selftimep != NULL) { 1488 _selftimep->inc(selftime); 1489 } 1490 // add all class loading related event selftime to the accumulated time counter 1491 ClassLoader::perf_accumulated_time()->inc(selftime); 1492 1493 // reset the timer 1494 _timers[_event_type].reset(); 1495} 1496