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--- old/src/share/vm/classfile/classLoader.cpp
+++ new/src/share/vm/classfile/classLoader.cpp
1 1 /*
2 2 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
3 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 4 *
5 5 * This code is free software; you can redistribute it and/or modify it
6 6 * under the terms of the GNU General Public License version 2 only, as
7 7 * published by the Free Software Foundation.
8 8 *
9 9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 12 * version 2 for more details (a copy is included in the LICENSE file that
13 13 * accompanied this code).
14 14 *
15 15 * You should have received a copy of the GNU General Public License version
16 16 * 2 along with this work; if not, write to the Free Software Foundation,
17 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 18 *
19 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 20 * or visit www.oracle.com if you need additional information or have any
21 21 * questions.
22 22 *
23 23 */
24 24
25 25 #include "precompiled.hpp"
26 26 #include "classfile/classFileParser.hpp"
27 27 #include "classfile/classFileStream.hpp"
28 28 #include "classfile/classLoader.hpp"
29 29 #include "classfile/javaClasses.hpp"
30 30 #include "classfile/systemDictionary.hpp"
31 31 #include "classfile/vmSymbols.hpp"
32 32 #include "compiler/compileBroker.hpp"
33 33 #include "gc_interface/collectedHeap.inline.hpp"
34 34 #include "interpreter/bytecodeStream.hpp"
35 35 #include "interpreter/oopMapCache.hpp"
36 36 #include "memory/allocation.inline.hpp"
37 37 #include "memory/generation.hpp"
38 38 #include "memory/oopFactory.hpp"
39 39 #include "memory/universe.inline.hpp"
40 40 #include "oops/constantPoolKlass.hpp"
41 41 #include "oops/instanceKlass.hpp"
42 42 #include "oops/instanceRefKlass.hpp"
43 43 #include "oops/oop.inline.hpp"
44 44 #include "oops/symbol.hpp"
45 45 #include "prims/jvm_misc.hpp"
46 46 #include "runtime/arguments.hpp"
47 47 #include "runtime/compilationPolicy.hpp"
48 48 #include "runtime/fprofiler.hpp"
49 49 #include "runtime/handles.hpp"
50 50 #include "runtime/handles.inline.hpp"
51 51 #include "runtime/init.hpp"
52 52 #include "runtime/interfaceSupport.hpp"
53 53 #include "runtime/java.hpp"
54 54 #include "runtime/javaCalls.hpp"
55 55 #include "runtime/threadCritical.hpp"
56 56 #include "runtime/timer.hpp"
57 57 #include "services/management.hpp"
58 58 #include "services/threadService.hpp"
59 59 #include "utilities/events.hpp"
60 60 #include "utilities/hashtable.hpp"
61 61 #include "utilities/hashtable.inline.hpp"
62 62 #ifdef TARGET_OS_FAMILY_linux
63 63 # include "os_linux.inline.hpp"
64 64 #endif
65 65 #ifdef TARGET_OS_FAMILY_solaris
66 66 # include "os_solaris.inline.hpp"
67 67 #endif
68 68 #ifdef TARGET_OS_FAMILY_windows
69 69 # include "os_windows.inline.hpp"
70 70 #endif
71 71
72 72
73 73 // Entry points in zip.dll for loading zip/jar file entries
74 74
75 75 typedef void * * (JNICALL *ZipOpen_t)(const char *name, char **pmsg);
76 76 typedef void (JNICALL *ZipClose_t)(jzfile *zip);
77 77 typedef jzentry* (JNICALL *FindEntry_t)(jzfile *zip, const char *name, jint *sizeP, jint *nameLen);
78 78 typedef jboolean (JNICALL *ReadEntry_t)(jzfile *zip, jzentry *entry, unsigned char *buf, char *namebuf);
79 79 typedef jboolean (JNICALL *ReadMappedEntry_t)(jzfile *zip, jzentry *entry, unsigned char **buf, char *namebuf);
80 80 typedef jzentry* (JNICALL *GetNextEntry_t)(jzfile *zip, jint n);
81 81
82 82 static ZipOpen_t ZipOpen = NULL;
83 83 static ZipClose_t ZipClose = NULL;
84 84 static FindEntry_t FindEntry = NULL;
85 85 static ReadEntry_t ReadEntry = NULL;
86 86 static ReadMappedEntry_t ReadMappedEntry = NULL;
87 87 static GetNextEntry_t GetNextEntry = NULL;
88 88 static canonicalize_fn_t CanonicalizeEntry = NULL;
89 89
90 90 // Globals
91 91
92 92 PerfCounter* ClassLoader::_perf_accumulated_time = NULL;
93 93 PerfCounter* ClassLoader::_perf_classes_inited = NULL;
94 94 PerfCounter* ClassLoader::_perf_class_init_time = NULL;
95 95 PerfCounter* ClassLoader::_perf_class_init_selftime = NULL;
96 96 PerfCounter* ClassLoader::_perf_classes_verified = NULL;
97 97 PerfCounter* ClassLoader::_perf_class_verify_time = NULL;
98 98 PerfCounter* ClassLoader::_perf_class_verify_selftime = NULL;
99 99 PerfCounter* ClassLoader::_perf_classes_linked = NULL;
100 100 PerfCounter* ClassLoader::_perf_class_link_time = NULL;
101 101 PerfCounter* ClassLoader::_perf_class_link_selftime = NULL;
102 102 PerfCounter* ClassLoader::_perf_class_parse_time = NULL;
103 103 PerfCounter* ClassLoader::_perf_class_parse_selftime = NULL;
104 104 PerfCounter* ClassLoader::_perf_sys_class_lookup_time = NULL;
105 105 PerfCounter* ClassLoader::_perf_shared_classload_time = NULL;
106 106 PerfCounter* ClassLoader::_perf_sys_classload_time = NULL;
107 107 PerfCounter* ClassLoader::_perf_app_classload_time = NULL;
108 108 PerfCounter* ClassLoader::_perf_app_classload_selftime = NULL;
109 109 PerfCounter* ClassLoader::_perf_app_classload_count = NULL;
110 110 PerfCounter* ClassLoader::_perf_define_appclasses = NULL;
111 111 PerfCounter* ClassLoader::_perf_define_appclass_time = NULL;
112 112 PerfCounter* ClassLoader::_perf_define_appclass_selftime = NULL;
113 113 PerfCounter* ClassLoader::_perf_app_classfile_bytes_read = NULL;
114 114 PerfCounter* ClassLoader::_perf_sys_classfile_bytes_read = NULL;
115 115 PerfCounter* ClassLoader::_sync_systemLoaderLockContentionRate = NULL;
116 116 PerfCounter* ClassLoader::_sync_nonSystemLoaderLockContentionRate = NULL;
117 117 PerfCounter* ClassLoader::_sync_JVMFindLoadedClassLockFreeCounter = NULL;
118 118 PerfCounter* ClassLoader::_sync_JVMDefineClassLockFreeCounter = NULL;
119 119 PerfCounter* ClassLoader::_sync_JNIDefineClassLockFreeCounter = NULL;
120 120 PerfCounter* ClassLoader::_unsafe_defineClassCallCounter = NULL;
121 121 PerfCounter* ClassLoader::_isUnsyncloadClass = NULL;
122 122 PerfCounter* ClassLoader::_load_instance_class_failCounter = NULL;
123 123
124 124 ClassPathEntry* ClassLoader::_first_entry = NULL;
125 125 ClassPathEntry* ClassLoader::_last_entry = NULL;
126 126 PackageHashtable* ClassLoader::_package_hash_table = NULL;
127 127
128 128 // helper routines
129 129 bool string_starts_with(const char* str, const char* str_to_find) {
130 130 size_t str_len = strlen(str);
131 131 size_t str_to_find_len = strlen(str_to_find);
132 132 if (str_to_find_len > str_len) {
133 133 return false;
134 134 }
135 135 return (strncmp(str, str_to_find, str_to_find_len) == 0);
136 136 }
137 137
138 138 bool string_ends_with(const char* str, const char* str_to_find) {
139 139 size_t str_len = strlen(str);
140 140 size_t str_to_find_len = strlen(str_to_find);
141 141 if (str_to_find_len > str_len) {
142 142 return false;
143 143 }
144 144 return (strncmp(str + (str_len - str_to_find_len), str_to_find, str_to_find_len) == 0);
145 145 }
146 146
147 147
148 148 MetaIndex::MetaIndex(char** meta_package_names, int num_meta_package_names) {
149 149 if (num_meta_package_names == 0) {
150 150 _meta_package_names = NULL;
151 151 _num_meta_package_names = 0;
152 152 } else {
153 153 _meta_package_names = NEW_C_HEAP_ARRAY(char*, num_meta_package_names);
154 154 _num_meta_package_names = num_meta_package_names;
155 155 memcpy(_meta_package_names, meta_package_names, num_meta_package_names * sizeof(char*));
156 156 }
157 157 }
158 158
159 159
160 160 MetaIndex::~MetaIndex() {
161 161 FREE_C_HEAP_ARRAY(char*, _meta_package_names);
162 162 }
163 163
164 164
165 165 bool MetaIndex::may_contain(const char* class_name) {
166 166 if ( _num_meta_package_names == 0) {
167 167 return false;
168 168 }
169 169 size_t class_name_len = strlen(class_name);
170 170 for (int i = 0; i < _num_meta_package_names; i++) {
171 171 char* pkg = _meta_package_names[i];
172 172 size_t pkg_len = strlen(pkg);
173 173 size_t min_len = MIN2(class_name_len, pkg_len);
174 174 if (!strncmp(class_name, pkg, min_len)) {
175 175 return true;
176 176 }
177 177 }
178 178 return false;
179 179 }
180 180
181 181
182 182 ClassPathEntry::ClassPathEntry() {
183 183 set_next(NULL);
184 184 }
185 185
186 186
187 187 bool ClassPathEntry::is_lazy() {
188 188 return false;
189 189 }
190 190
191 191 ClassPathDirEntry::ClassPathDirEntry(char* dir) : ClassPathEntry() {
192 192 _dir = NEW_C_HEAP_ARRAY(char, strlen(dir)+1);
193 193 strcpy(_dir, dir);
194 194 }
195 195
196 196
197 197 ClassFileStream* ClassPathDirEntry::open_stream(const char* name) {
198 198 // construct full path name
199 199 char path[JVM_MAXPATHLEN];
200 200 if (jio_snprintf(path, sizeof(path), "%s%s%s", _dir, os::file_separator(), name) == -1) {
201 201 return NULL;
202 202 }
203 203 // check if file exists
204 204 struct stat st;
205 205 if (os::stat(path, &st) == 0) {
206 206 // found file, open it
207 207 int file_handle = os::open(path, 0, 0);
208 208 if (file_handle != -1) {
209 209 // read contents into resource array
210 210 u1* buffer = NEW_RESOURCE_ARRAY(u1, st.st_size);
211 211 size_t num_read = os::read(file_handle, (char*) buffer, st.st_size);
212 212 // close file
213 213 os::close(file_handle);
214 214 // construct ClassFileStream
215 215 if (num_read == (size_t)st.st_size) {
216 216 if (UsePerfData) {
217 217 ClassLoader::perf_sys_classfile_bytes_read()->inc(num_read);
218 218 }
219 219 return new ClassFileStream(buffer, st.st_size, _dir); // Resource allocated
220 220 }
221 221 }
222 222 }
223 223 return NULL;
224 224 }
225 225
226 226
227 227 ClassPathZipEntry::ClassPathZipEntry(jzfile* zip, const char* zip_name) : ClassPathEntry() {
228 228 _zip = zip;
229 229 _zip_name = NEW_C_HEAP_ARRAY(char, strlen(zip_name)+1);
230 230 strcpy(_zip_name, zip_name);
231 231 }
232 232
233 233 ClassPathZipEntry::~ClassPathZipEntry() {
234 234 if (ZipClose != NULL) {
235 235 (*ZipClose)(_zip);
236 236 }
237 237 FREE_C_HEAP_ARRAY(char, _zip_name);
238 238 }
239 239
240 240 ClassFileStream* ClassPathZipEntry::open_stream(const char* name) {
241 241 // enable call to C land
242 242 JavaThread* thread = JavaThread::current();
243 243 ThreadToNativeFromVM ttn(thread);
244 244 // check whether zip archive contains name
245 245 jint filesize, name_len;
246 246 jzentry* entry = (*FindEntry)(_zip, name, &filesize, &name_len);
247 247 if (entry == NULL) return NULL;
248 248 u1* buffer;
249 249 char name_buf[128];
250 250 char* filename;
251 251 if (name_len < 128) {
252 252 filename = name_buf;
253 253 } else {
254 254 filename = NEW_RESOURCE_ARRAY(char, name_len + 1);
255 255 }
256 256
257 257 // file found, get pointer to class in mmaped jar file.
258 258 if (ReadMappedEntry == NULL ||
259 259 !(*ReadMappedEntry)(_zip, entry, &buffer, filename)) {
260 260 // mmaped access not available, perhaps due to compression,
261 261 // read contents into resource array
262 262 buffer = NEW_RESOURCE_ARRAY(u1, filesize);
263 263 if (!(*ReadEntry)(_zip, entry, buffer, filename)) return NULL;
264 264 }
265 265 if (UsePerfData) {
266 266 ClassLoader::perf_sys_classfile_bytes_read()->inc(filesize);
267 267 }
268 268 // return result
269 269 return new ClassFileStream(buffer, filesize, _zip_name); // Resource allocated
270 270 }
271 271
272 272 // invoke function for each entry in the zip file
273 273 void ClassPathZipEntry::contents_do(void f(const char* name, void* context), void* context) {
274 274 JavaThread* thread = JavaThread::current();
275 275 HandleMark handle_mark(thread);
276 276 ThreadToNativeFromVM ttn(thread);
277 277 for (int n = 0; ; n++) {
278 278 jzentry * ze = ((*GetNextEntry)(_zip, n));
279 279 if (ze == NULL) break;
280 280 (*f)(ze->name, context);
281 281 }
282 282 }
283 283
284 284 LazyClassPathEntry::LazyClassPathEntry(char* path, struct stat st) : ClassPathEntry() {
285 285 _path = strdup(path);
286 286 _st = st;
287 287 _meta_index = NULL;
288 288 _resolved_entry = NULL;
289 289 }
290 290
291 291 bool LazyClassPathEntry::is_jar_file() {
292 292 return ((_st.st_mode & S_IFREG) == S_IFREG);
293 293 }
294 294
295 295 ClassPathEntry* LazyClassPathEntry::resolve_entry() {
296 296 if (_resolved_entry != NULL) {
297 297 return (ClassPathEntry*) _resolved_entry;
298 298 }
299 299 ClassPathEntry* new_entry = NULL;
300 300 ClassLoader::create_class_path_entry(_path, _st, &new_entry, false);
301 301 assert(new_entry != NULL, "earlier code should have caught this");
302 302 {
303 303 ThreadCritical tc;
304 304 if (_resolved_entry == NULL) {
305 305 _resolved_entry = new_entry;
306 306 return new_entry;
307 307 }
308 308 }
309 309 assert(_resolved_entry != NULL, "bug in MT-safe resolution logic");
310 310 delete new_entry;
311 311 return (ClassPathEntry*) _resolved_entry;
312 312 }
313 313
314 314 ClassFileStream* LazyClassPathEntry::open_stream(const char* name) {
315 315 if (_meta_index != NULL &&
316 316 !_meta_index->may_contain(name)) {
317 317 return NULL;
318 318 }
319 319 return resolve_entry()->open_stream(name);
320 320 }
321 321
322 322 bool LazyClassPathEntry::is_lazy() {
323 323 return true;
324 324 }
325 325
326 326 static void print_meta_index(LazyClassPathEntry* entry,
327 327 GrowableArray<char*>& meta_packages) {
328 328 tty->print("[Meta index for %s=", entry->name());
329 329 for (int i = 0; i < meta_packages.length(); i++) {
330 330 if (i > 0) tty->print(" ");
331 331 tty->print(meta_packages.at(i));
332 332 }
333 333 tty->print_cr("]");
334 334 }
335 335
336 336
337 337 void ClassLoader::setup_meta_index() {
338 338 // Set up meta index which allows us to open boot jars lazily if
339 339 // class data sharing is enabled
340 340 const char* known_version = "% VERSION 2";
341 341 char* meta_index_path = Arguments::get_meta_index_path();
342 342 char* meta_index_dir = Arguments::get_meta_index_dir();
343 343 FILE* file = fopen(meta_index_path, "r");
344 344 int line_no = 0;
345 345 if (file != NULL) {
346 346 ResourceMark rm;
347 347 LazyClassPathEntry* cur_entry = NULL;
348 348 GrowableArray<char*> boot_class_path_packages(10);
349 349 char package_name[256];
350 350 bool skipCurrentJar = false;
351 351 while (fgets(package_name, sizeof(package_name), file) != NULL) {
352 352 ++line_no;
353 353 // Remove trailing newline
354 354 package_name[strlen(package_name) - 1] = '\0';
355 355 switch(package_name[0]) {
356 356 case '%':
357 357 {
358 358 if ((line_no == 1) && (strcmp(package_name, known_version) != 0)) {
359 359 if (TraceClassLoading && Verbose) {
360 360 tty->print("[Unsupported meta index version]");
361 361 }
362 362 fclose(file);
363 363 return;
364 364 }
365 365 }
366 366
367 367 // These directives indicate jar files which contain only
368 368 // classes, only non-classfile resources, or a combination of
369 369 // the two. See src/share/classes/sun/misc/MetaIndex.java and
370 370 // make/tools/MetaIndex/BuildMetaIndex.java in the J2SE
371 371 // workspace.
372 372 case '#':
373 373 case '!':
374 374 case '@':
375 375 {
376 376 // Hand off current packages to current lazy entry (if any)
377 377 if ((cur_entry != NULL) &&
378 378 (boot_class_path_packages.length() > 0)) {
379 379 if (TraceClassLoading && Verbose) {
380 380 print_meta_index(cur_entry, boot_class_path_packages);
381 381 }
382 382 MetaIndex* index = new MetaIndex(boot_class_path_packages.adr_at(0),
383 383 boot_class_path_packages.length());
384 384 cur_entry->set_meta_index(index);
385 385 }
386 386 cur_entry = NULL;
387 387 boot_class_path_packages.clear();
388 388
389 389 // Find lazy entry corresponding to this jar file
390 390 for (ClassPathEntry* entry = _first_entry; entry != NULL; entry = entry->next()) {
391 391 if (entry->is_lazy() &&
392 392 string_starts_with(entry->name(), meta_index_dir) &&
393 393 string_ends_with(entry->name(), &package_name[2])) {
394 394 cur_entry = (LazyClassPathEntry*) entry;
395 395 break;
396 396 }
397 397 }
398 398
399 399 // If the first character is '@', it indicates the following jar
400 400 // file is a resource only jar file in which case, we should skip
401 401 // reading the subsequent entries since the resource loading is
402 402 // totally handled by J2SE side.
403 403 if (package_name[0] == '@') {
404 404 if (cur_entry != NULL) {
405 405 cur_entry->set_meta_index(new MetaIndex(NULL, 0));
406 406 }
407 407 cur_entry = NULL;
408 408 skipCurrentJar = true;
409 409 } else {
410 410 skipCurrentJar = false;
411 411 }
412 412
413 413 break;
414 414 }
415 415
416 416 default:
417 417 {
418 418 if (!skipCurrentJar && cur_entry != NULL) {
419 419 char* new_name = strdup(package_name);
420 420 boot_class_path_packages.append(new_name);
421 421 }
422 422 }
423 423 }
424 424 }
425 425 // Hand off current packages to current lazy entry (if any)
426 426 if ((cur_entry != NULL) &&
427 427 (boot_class_path_packages.length() > 0)) {
428 428 if (TraceClassLoading && Verbose) {
429 429 print_meta_index(cur_entry, boot_class_path_packages);
430 430 }
431 431 MetaIndex* index = new MetaIndex(boot_class_path_packages.adr_at(0),
432 432 boot_class_path_packages.length());
433 433 cur_entry->set_meta_index(index);
434 434 }
435 435 fclose(file);
436 436 }
437 437 }
438 438
439 439 void ClassLoader::setup_bootstrap_search_path() {
440 440 assert(_first_entry == NULL, "should not setup bootstrap class search path twice");
441 441 char* sys_class_path = os::strdup(Arguments::get_sysclasspath());
442 442 if (TraceClassLoading && Verbose) {
443 443 tty->print_cr("[Bootstrap loader class path=%s]", sys_class_path);
444 444 }
445 445
446 446 int len = (int)strlen(sys_class_path);
447 447 int end = 0;
448 448
449 449 // Iterate over class path entries
450 450 for (int start = 0; start < len; start = end) {
451 451 while (sys_class_path[end] && sys_class_path[end] != os::path_separator()[0]) {
452 452 end++;
453 453 }
454 454 char* path = NEW_C_HEAP_ARRAY(char, end-start+1);
455 455 strncpy(path, &sys_class_path[start], end-start);
456 456 path[end-start] = '\0';
457 457 update_class_path_entry_list(path, false);
458 458 FREE_C_HEAP_ARRAY(char, path);
459 459 while (sys_class_path[end] == os::path_separator()[0]) {
460 460 end++;
461 461 }
462 462 }
463 463 }
464 464
465 465 void ClassLoader::create_class_path_entry(char *path, struct stat st, ClassPathEntry **new_entry, bool lazy) {
466 466 JavaThread* thread = JavaThread::current();
467 467 if (lazy) {
468 468 *new_entry = new LazyClassPathEntry(path, st);
469 469 return;
470 470 }
471 471 if ((st.st_mode & S_IFREG) == S_IFREG) {
472 472 // Regular file, should be a zip file
473 473 // Canonicalized filename
474 474 char canonical_path[JVM_MAXPATHLEN];
475 475 if (!get_canonical_path(path, canonical_path, JVM_MAXPATHLEN)) {
476 476 // This matches the classic VM
477 477 EXCEPTION_MARK;
478 478 THROW_MSG(vmSymbols::java_io_IOException(), "Bad pathname");
479 479 }
480 480 char* error_msg = NULL;
481 481 jzfile* zip;
482 482 {
483 483 // enable call to C land
484 484 ThreadToNativeFromVM ttn(thread);
485 485 HandleMark hm(thread);
486 486 zip = (*ZipOpen)(canonical_path, &error_msg);
487 487 }
488 488 if (zip != NULL && error_msg == NULL) {
489 489 *new_entry = new ClassPathZipEntry(zip, path);
490 490 if (TraceClassLoading) {
491 491 tty->print_cr("[Opened %s]", path);
492 492 }
493 493 } else {
494 494 ResourceMark rm(thread);
495 495 char *msg;
496 496 if (error_msg == NULL) {
497 497 msg = NEW_RESOURCE_ARRAY(char, strlen(path) + 128); ;
498 498 jio_snprintf(msg, strlen(path) + 127, "error in opening JAR file %s", path);
499 499 } else {
500 500 int len = (int)(strlen(path) + strlen(error_msg) + 128);
501 501 msg = NEW_RESOURCE_ARRAY(char, len); ;
502 502 jio_snprintf(msg, len - 1, "error in opening JAR file <%s> %s", error_msg, path);
503 503 }
504 504 EXCEPTION_MARK;
505 505 THROW_MSG(vmSymbols::java_lang_ClassNotFoundException(), msg);
506 506 }
507 507 } else {
508 508 // Directory
509 509 *new_entry = new ClassPathDirEntry(path);
510 510 if (TraceClassLoading) {
511 511 tty->print_cr("[Path %s]", path);
512 512 }
513 513 }
514 514 }
515 515
516 516
517 517 // Create a class path zip entry for a given path (return NULL if not found
518 518 // or zip/JAR file cannot be opened)
519 519 ClassPathZipEntry* ClassLoader::create_class_path_zip_entry(const char *path) {
520 520 // check for a regular file
521 521 struct stat st;
522 522 if (os::stat(path, &st) == 0) {
523 523 if ((st.st_mode & S_IFREG) == S_IFREG) {
524 524 char orig_path[JVM_MAXPATHLEN];
525 525 char canonical_path[JVM_MAXPATHLEN];
526 526
527 527 strcpy(orig_path, path);
528 528 if (get_canonical_path(orig_path, canonical_path, JVM_MAXPATHLEN)) {
529 529 char* error_msg = NULL;
530 530 jzfile* zip;
531 531 {
532 532 // enable call to C land
533 533 JavaThread* thread = JavaThread::current();
534 534 ThreadToNativeFromVM ttn(thread);
535 535 HandleMark hm(thread);
536 536 zip = (*ZipOpen)(canonical_path, &error_msg);
537 537 }
538 538 if (zip != NULL && error_msg == NULL) {
539 539 // create using canonical path
540 540 return new ClassPathZipEntry(zip, canonical_path);
541 541 }
542 542 }
543 543 }
544 544 }
545 545 return NULL;
546 546 }
547 547
548 548 // returns true if entry already on class path
549 549 bool ClassLoader::contains_entry(ClassPathEntry *entry) {
550 550 ClassPathEntry* e = _first_entry;
551 551 while (e != NULL) {
552 552 // assume zip entries have been canonicalized
553 553 if (strcmp(entry->name(), e->name()) == 0) {
554 554 return true;
555 555 }
556 556 e = e->next();
557 557 }
558 558 return false;
559 559 }
560 560
561 561 void ClassLoader::add_to_list(ClassPathEntry *new_entry) {
562 562 if (new_entry != NULL) {
563 563 if (_last_entry == NULL) {
564 564 _first_entry = _last_entry = new_entry;
565 565 } else {
566 566 _last_entry->set_next(new_entry);
567 567 _last_entry = new_entry;
568 568 }
569 569 }
570 570 }
571 571
572 572 void ClassLoader::update_class_path_entry_list(const char *path,
573 573 bool check_for_duplicates) {
574 574 struct stat st;
575 575 if (os::stat((char *)path, &st) == 0) {
576 576 // File or directory found
577 577 ClassPathEntry* new_entry = NULL;
578 578 create_class_path_entry((char *)path, st, &new_entry, LazyBootClassLoader);
579 579 // The kernel VM adds dynamically to the end of the classloader path and
580 580 // doesn't reorder the bootclasspath which would break java.lang.Package
581 581 // (see PackageInfo).
582 582 // Add new entry to linked list
583 583 if (!check_for_duplicates || !contains_entry(new_entry)) {
584 584 add_to_list(new_entry);
585 585 }
586 586 }
587 587 }
588 588
589 589 void ClassLoader::print_bootclasspath() {
590 590 ClassPathEntry* e = _first_entry;
591 591 tty->print("[bootclasspath= ");
592 592 while (e != NULL) {
593 593 tty->print("%s ;", e->name());
594 594 e = e->next();
595 595 }
596 596 tty->print_cr("]");
597 597 }
598 598
599 599 void ClassLoader::load_zip_library() {
600 600 assert(ZipOpen == NULL, "should not load zip library twice");
601 601 // First make sure native library is loaded
602 602 os::native_java_library();
603 603 // Load zip library
604 604 char path[JVM_MAXPATHLEN];
605 605 char ebuf[1024];
606 606 os::dll_build_name(path, sizeof(path), Arguments::get_dll_dir(), "zip");
607 607 void* handle = os::dll_load(path, ebuf, sizeof ebuf);
608 608 if (handle == NULL) {
609 609 vm_exit_during_initialization("Unable to load ZIP library", path);
610 610 }
611 611 // Lookup zip entry points
612 612 ZipOpen = CAST_TO_FN_PTR(ZipOpen_t, os::dll_lookup(handle, "ZIP_Open"));
613 613 ZipClose = CAST_TO_FN_PTR(ZipClose_t, os::dll_lookup(handle, "ZIP_Close"));
614 614 FindEntry = CAST_TO_FN_PTR(FindEntry_t, os::dll_lookup(handle, "ZIP_FindEntry"));
615 615 ReadEntry = CAST_TO_FN_PTR(ReadEntry_t, os::dll_lookup(handle, "ZIP_ReadEntry"));
616 616 ReadMappedEntry = CAST_TO_FN_PTR(ReadMappedEntry_t, os::dll_lookup(handle, "ZIP_ReadMappedEntry"));
617 617 GetNextEntry = CAST_TO_FN_PTR(GetNextEntry_t, os::dll_lookup(handle, "ZIP_GetNextEntry"));
618 618
619 619 // ZIP_Close is not exported on Windows in JDK5.0 so don't abort if ZIP_Close is NULL
620 620 if (ZipOpen == NULL || FindEntry == NULL || ReadEntry == NULL || GetNextEntry == NULL) {
621 621 vm_exit_during_initialization("Corrupted ZIP library", path);
622 622 }
623 623
624 624 // Lookup canonicalize entry in libjava.dll
625 625 void *javalib_handle = os::native_java_library();
626 626 CanonicalizeEntry = CAST_TO_FN_PTR(canonicalize_fn_t, os::dll_lookup(javalib_handle, "Canonicalize"));
627 627 // This lookup only works on 1.3. Do not check for non-null here
628 628 }
629 629
630 630 // PackageInfo data exists in order to support the java.lang.Package
631 631 // class. A Package object provides information about a java package
632 632 // (version, vendor, etc.) which originates in the manifest of the jar
633 633 // file supplying the package. For application classes, the ClassLoader
634 634 // object takes care of this.
635 635
636 636 // For system (boot) classes, the Java code in the Package class needs
637 637 // to be able to identify which source jar file contained the boot
638 638 // class, so that it can extract the manifest from it. This table
639 639 // identifies java packages with jar files in the boot classpath.
640 640
641 641 // Because the boot classpath cannot change, the classpath index is
642 642 // sufficient to identify the source jar file or directory. (Since
643 643 // directories have no manifests, the directory name is not required,
644 644 // but is available.)
645 645
646 646 // When using sharing -- the pathnames of entries in the boot classpath
647 647 // may not be the same at runtime as they were when the archive was
648 648 // created (NFS, Samba, etc.). The actual files and directories named
649 649 // in the classpath must be the same files, in the same order, even
650 650 // though the exact name is not the same.
651 651
652 652 class PackageInfo: public BasicHashtableEntry {
653 653 public:
654 654 const char* _pkgname; // Package name
655 655 int _classpath_index; // Index of directory or JAR file loaded from
656 656
657 657 PackageInfo* next() {
658 658 return (PackageInfo*)BasicHashtableEntry::next();
659 659 }
660 660
661 661 const char* pkgname() { return _pkgname; }
662 662 void set_pkgname(char* pkgname) { _pkgname = pkgname; }
663 663
664 664 const char* filename() {
665 665 return ClassLoader::classpath_entry(_classpath_index)->name();
666 666 }
667 667
668 668 void set_index(int index) {
669 669 _classpath_index = index;
670 670 }
671 671 };
672 672
673 673
674 674 class PackageHashtable : public BasicHashtable {
675 675 private:
676 676 inline unsigned int compute_hash(const char *s, int n) {
677 677 unsigned int val = 0;
678 678 while (--n >= 0) {
679 679 val = *s++ + 31 * val;
680 680 }
681 681 return val;
682 682 }
683 683
684 684 PackageInfo* bucket(int index) {
685 685 return (PackageInfo*)BasicHashtable::bucket(index);
686 686 }
687 687
688 688 PackageInfo* get_entry(int index, unsigned int hash,
689 689 const char* pkgname, size_t n) {
690 690 for (PackageInfo* pp = bucket(index); pp != NULL; pp = pp->next()) {
691 691 if (pp->hash() == hash &&
692 692 strncmp(pkgname, pp->pkgname(), n) == 0 &&
693 693 pp->pkgname()[n] == '\0') {
694 694 return pp;
695 695 }
696 696 }
697 697 return NULL;
698 698 }
699 699
700 700 public:
701 701 PackageHashtable(int table_size)
702 702 : BasicHashtable(table_size, sizeof(PackageInfo)) {}
703 703
704 704 PackageHashtable(int table_size, HashtableBucket* t, int number_of_entries)
705 705 : BasicHashtable(table_size, sizeof(PackageInfo), t, number_of_entries) {}
706 706
707 707 PackageInfo* get_entry(const char* pkgname, int n) {
708 708 unsigned int hash = compute_hash(pkgname, n);
709 709 return get_entry(hash_to_index(hash), hash, pkgname, n);
710 710 }
711 711
712 712 PackageInfo* new_entry(char* pkgname, int n) {
713 713 unsigned int hash = compute_hash(pkgname, n);
714 714 PackageInfo* pp;
715 715 pp = (PackageInfo*)BasicHashtable::new_entry(hash);
716 716 pp->set_pkgname(pkgname);
717 717 return pp;
718 718 }
719 719
720 720 void add_entry(PackageInfo* pp) {
721 721 int index = hash_to_index(pp->hash());
722 722 BasicHashtable::add_entry(index, pp);
723 723 }
724 724
725 725 void copy_pkgnames(const char** packages) {
726 726 int n = 0;
727 727 for (int i = 0; i < table_size(); ++i) {
728 728 for (PackageInfo* pp = bucket(i); pp != NULL; pp = pp->next()) {
729 729 packages[n++] = pp->pkgname();
730 730 }
731 731 }
732 732 assert(n == number_of_entries(), "just checking");
733 733 }
734 734
735 735 void copy_table(char** top, char* end, PackageHashtable* table);
736 736 };
737 737
738 738
739 739 void PackageHashtable::copy_table(char** top, char* end,
740 740 PackageHashtable* table) {
741 741 // Copy (relocate) the table to the shared space.
742 742 BasicHashtable::copy_table(top, end);
743 743
744 744 // Calculate the space needed for the package name strings.
745 745 int i;
746 746 int n = 0;
747 747 for (i = 0; i < table_size(); ++i) {
748 748 for (PackageInfo* pp = table->bucket(i);
749 749 pp != NULL;
750 750 pp = pp->next()) {
751 751 n += (int)(strlen(pp->pkgname()) + 1);
752 752 }
753 753 }
754 754 if (*top + n + sizeof(intptr_t) >= end) {
755 755 report_out_of_shared_space(SharedMiscData);
756 756 }
757 757
758 758 // Copy the table data (the strings) to the shared space.
759 759 n = align_size_up(n, sizeof(HeapWord));
760 760 *(intptr_t*)(*top) = n;
761 761 *top += sizeof(intptr_t);
762 762
763 763 for (i = 0; i < table_size(); ++i) {
764 764 for (PackageInfo* pp = table->bucket(i);
765 765 pp != NULL;
766 766 pp = pp->next()) {
767 767 int n1 = (int)(strlen(pp->pkgname()) + 1);
768 768 pp->set_pkgname((char*)memcpy(*top, pp->pkgname(), n1));
769 769 *top += n1;
770 770 }
771 771 }
772 772 *top = (char*)align_size_up((intptr_t)*top, sizeof(HeapWord));
773 773 }
774 774
775 775
776 776 void ClassLoader::copy_package_info_buckets(char** top, char* end) {
777 777 _package_hash_table->copy_buckets(top, end);
778 778 }
779 779
780 780 void ClassLoader::copy_package_info_table(char** top, char* end) {
781 781 _package_hash_table->copy_table(top, end, _package_hash_table);
782 782 }
783 783
784 784
785 785 PackageInfo* ClassLoader::lookup_package(const char *pkgname) {
786 786 const char *cp = strrchr(pkgname, '/');
787 787 if (cp != NULL) {
788 788 // Package prefix found
789 789 int n = cp - pkgname + 1;
790 790 return _package_hash_table->get_entry(pkgname, n);
791 791 }
792 792 return NULL;
793 793 }
794 794
795 795
796 796 bool ClassLoader::add_package(const char *pkgname, int classpath_index, TRAPS) {
797 797 assert(pkgname != NULL, "just checking");
798 798 // Bootstrap loader no longer holds system loader lock obj serializing
799 799 // load_instance_class and thereby add_package
800 800 {
801 801 MutexLocker ml(PackageTable_lock, THREAD);
802 802 // First check for previously loaded entry
803 803 PackageInfo* pp = lookup_package(pkgname);
804 804 if (pp != NULL) {
805 805 // Existing entry found, check source of package
806 806 pp->set_index(classpath_index);
807 807 return true;
808 808 }
809 809
810 810 const char *cp = strrchr(pkgname, '/');
811 811 if (cp != NULL) {
812 812 // Package prefix found
813 813 int n = cp - pkgname + 1;
814 814
815 815 char* new_pkgname = NEW_C_HEAP_ARRAY(char, n + 1);
816 816 if (new_pkgname == NULL) {
817 817 return false;
818 818 }
819 819
820 820 memcpy(new_pkgname, pkgname, n);
821 821 new_pkgname[n] = '\0';
822 822 pp = _package_hash_table->new_entry(new_pkgname, n);
823 823 pp->set_index(classpath_index);
824 824
825 825 // Insert into hash table
826 826 _package_hash_table->add_entry(pp);
827 827 }
828 828 return true;
829 829 }
830 830 }
831 831
832 832
833 833 oop ClassLoader::get_system_package(const char* name, TRAPS) {
834 834 PackageInfo* pp;
835 835 {
836 836 MutexLocker ml(PackageTable_lock, THREAD);
837 837 pp = lookup_package(name);
838 838 }
839 839 if (pp == NULL) {
840 840 return NULL;
841 841 } else {
842 842 Handle p = java_lang_String::create_from_str(pp->filename(), THREAD);
843 843 return p();
844 844 }
845 845 }
846 846
847 847
848 848 objArrayOop ClassLoader::get_system_packages(TRAPS) {
849 849 ResourceMark rm(THREAD);
850 850 int nof_entries;
851 851 const char** packages;
852 852 {
853 853 MutexLocker ml(PackageTable_lock, THREAD);
854 854 // Allocate resource char* array containing package names
855 855 nof_entries = _package_hash_table->number_of_entries();
856 856 if ((packages = NEW_RESOURCE_ARRAY(const char*, nof_entries)) == NULL) {
857 857 return NULL;
858 858 }
859 859 _package_hash_table->copy_pkgnames(packages);
860 860 }
861 861 // Allocate objArray and fill with java.lang.String
862 862 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
863 863 nof_entries, CHECK_0);
864 864 objArrayHandle result(THREAD, r);
865 865 for (int i = 0; i < nof_entries; i++) {
866 866 Handle str = java_lang_String::create_from_str(packages[i], CHECK_0);
867 867 result->obj_at_put(i, str());
868 868 }
869 869
870 870 return result();
871 871 }
872 872
873 873
874 874 instanceKlassHandle ClassLoader::load_classfile(Symbol* h_name, TRAPS) {
875 875 ResourceMark rm(THREAD);
876 876 EventMark m("loading class " INTPTR_FORMAT, (address)h_name);
877 877 ThreadProfilerMark tpm(ThreadProfilerMark::classLoaderRegion);
878 878
879 879 stringStream st;
880 880 // st.print() uses too much stack space while handling a StackOverflowError
881 881 // st.print("%s.class", h_name->as_utf8());
882 882 st.print_raw(h_name->as_utf8());
883 883 st.print_raw(".class");
884 884 char* name = st.as_string();
885 885
886 886 // Lookup stream for parsing .class file
887 887 ClassFileStream* stream = NULL;
888 888 int classpath_index = 0;
889 889 {
890 890 PerfClassTraceTime vmtimer(perf_sys_class_lookup_time(),
891 891 ((JavaThread*) THREAD)->get_thread_stat()->perf_timers_addr(),
892 892 PerfClassTraceTime::CLASS_LOAD);
893 893 ClassPathEntry* e = _first_entry;
894 894 while (e != NULL) {
895 895 stream = e->open_stream(name);
896 896 if (stream != NULL) {
897 897 break;
898 898 }
899 899 e = e->next();
900 900 ++classpath_index;
901 901 }
902 902 }
903 903
904 904 instanceKlassHandle h(THREAD, klassOop(NULL));
905 905 if (stream != NULL) {
906 906
907 907 // class file found, parse it
908 908 ClassFileParser parser(stream);
909 909 Handle class_loader;
910 910 Handle protection_domain;
911 911 TempNewSymbol parsed_name = NULL;
912 912 instanceKlassHandle result = parser.parseClassFile(h_name,
913 913 class_loader,
914 914 protection_domain,
915 915 parsed_name,
916 916 false,
917 917 CHECK_(h));
918 918
919 919 // add to package table
920 920 if (add_package(name, classpath_index, THREAD)) {
921 921 h = result;
922 922 }
923 923 }
924 924
925 925 return h;
926 926 }
927 927
928 928
929 929 void ClassLoader::create_package_info_table(HashtableBucket *t, int length,
930 930 int number_of_entries) {
931 931 assert(_package_hash_table == NULL, "One package info table allowed.");
932 932 assert(length == package_hash_table_size * sizeof(HashtableBucket),
933 933 "bad shared package info size.");
934 934 _package_hash_table = new PackageHashtable(package_hash_table_size, t,
935 935 number_of_entries);
936 936 }
937 937
938 938
939 939 void ClassLoader::create_package_info_table() {
940 940 assert(_package_hash_table == NULL, "shouldn't have one yet");
941 941 _package_hash_table = new PackageHashtable(package_hash_table_size);
942 942 }
943 943
944 944
945 945 // Initialize the class loader's access to methods in libzip. Parse and
946 946 // process the boot classpath into a list ClassPathEntry objects. Once
947 947 // this list has been created, it must not change order (see class PackageInfo)
948 948 // it can be appended to and is by jvmti and the kernel vm.
949 949
950 950 void ClassLoader::initialize() {
951 951 assert(_package_hash_table == NULL, "should have been initialized by now.");
952 952 EXCEPTION_MARK;
953 953
954 954 if (UsePerfData) {
955 955 // jvmstat performance counters
956 956 NEWPERFTICKCOUNTER(_perf_accumulated_time, SUN_CLS, "time");
957 957 NEWPERFTICKCOUNTER(_perf_class_init_time, SUN_CLS, "classInitTime");
958 958 NEWPERFTICKCOUNTER(_perf_class_init_selftime, SUN_CLS, "classInitTime.self");
959 959 NEWPERFTICKCOUNTER(_perf_class_verify_time, SUN_CLS, "classVerifyTime");
960 960 NEWPERFTICKCOUNTER(_perf_class_verify_selftime, SUN_CLS, "classVerifyTime.self");
961 961 NEWPERFTICKCOUNTER(_perf_class_link_time, SUN_CLS, "classLinkedTime");
962 962 NEWPERFTICKCOUNTER(_perf_class_link_selftime, SUN_CLS, "classLinkedTime.self");
963 963 NEWPERFEVENTCOUNTER(_perf_classes_inited, SUN_CLS, "initializedClasses");
964 964 NEWPERFEVENTCOUNTER(_perf_classes_linked, SUN_CLS, "linkedClasses");
965 965 NEWPERFEVENTCOUNTER(_perf_classes_verified, SUN_CLS, "verifiedClasses");
966 966
967 967 NEWPERFTICKCOUNTER(_perf_class_parse_time, SUN_CLS, "parseClassTime");
968 968 NEWPERFTICKCOUNTER(_perf_class_parse_selftime, SUN_CLS, "parseClassTime.self");
969 969 NEWPERFTICKCOUNTER(_perf_sys_class_lookup_time, SUN_CLS, "lookupSysClassTime");
970 970 NEWPERFTICKCOUNTER(_perf_shared_classload_time, SUN_CLS, "sharedClassLoadTime");
971 971 NEWPERFTICKCOUNTER(_perf_sys_classload_time, SUN_CLS, "sysClassLoadTime");
972 972 NEWPERFTICKCOUNTER(_perf_app_classload_time, SUN_CLS, "appClassLoadTime");
973 973 NEWPERFTICKCOUNTER(_perf_app_classload_selftime, SUN_CLS, "appClassLoadTime.self");
974 974 NEWPERFEVENTCOUNTER(_perf_app_classload_count, SUN_CLS, "appClassLoadCount");
975 975 NEWPERFTICKCOUNTER(_perf_define_appclasses, SUN_CLS, "defineAppClasses");
976 976 NEWPERFTICKCOUNTER(_perf_define_appclass_time, SUN_CLS, "defineAppClassTime");
977 977 NEWPERFTICKCOUNTER(_perf_define_appclass_selftime, SUN_CLS, "defineAppClassTime.self");
978 978 NEWPERFBYTECOUNTER(_perf_app_classfile_bytes_read, SUN_CLS, "appClassBytes");
979 979 NEWPERFBYTECOUNTER(_perf_sys_classfile_bytes_read, SUN_CLS, "sysClassBytes");
980 980
981 981
982 982 // The following performance counters are added for measuring the impact
983 983 // of the bug fix of 6365597. They are mainly focused on finding out
984 984 // the behavior of system & user-defined classloader lock, whether
985 985 // ClassLoader.loadClass/findClass is being called synchronized or not.
986 986 // Also two additional counters are created to see whether 'UnsyncloadClass'
987 987 // flag is being set or not and how many times load_instance_class call
988 988 // fails with linkageError etc.
989 989 NEWPERFEVENTCOUNTER(_sync_systemLoaderLockContentionRate, SUN_CLS,
990 990 "systemLoaderLockContentionRate");
991 991 NEWPERFEVENTCOUNTER(_sync_nonSystemLoaderLockContentionRate, SUN_CLS,
992 992 "nonSystemLoaderLockContentionRate");
993 993 NEWPERFEVENTCOUNTER(_sync_JVMFindLoadedClassLockFreeCounter, SUN_CLS,
994 994 "jvmFindLoadedClassNoLockCalls");
995 995 NEWPERFEVENTCOUNTER(_sync_JVMDefineClassLockFreeCounter, SUN_CLS,
996 996 "jvmDefineClassNoLockCalls");
997 997
998 998 NEWPERFEVENTCOUNTER(_sync_JNIDefineClassLockFreeCounter, SUN_CLS,
999 999 "jniDefineClassNoLockCalls");
1000 1000
1001 1001 NEWPERFEVENTCOUNTER(_unsafe_defineClassCallCounter, SUN_CLS,
1002 1002 "unsafeDefineClassCalls");
1003 1003
1004 1004 NEWPERFEVENTCOUNTER(_isUnsyncloadClass, SUN_CLS, "isUnsyncloadClassSet");
1005 1005 NEWPERFEVENTCOUNTER(_load_instance_class_failCounter, SUN_CLS,
1006 1006 "loadInstanceClassFailRate");
1007 1007
1008 1008 // increment the isUnsyncloadClass counter if UnsyncloadClass is set.
1009 1009 if (UnsyncloadClass) {
1010 1010 _isUnsyncloadClass->inc();
1011 1011 }
1012 1012 }
1013 1013
1014 1014 // lookup zip library entry points
1015 1015 load_zip_library();
1016 1016 // initialize search path
1017 1017 setup_bootstrap_search_path();
1018 1018 if (LazyBootClassLoader) {
1019 1019 // set up meta index which makes boot classpath initialization lazier
1020 1020 setup_meta_index();
1021 1021 }
1022 1022 }
1023 1023
1024 1024
1025 1025 jlong ClassLoader::classloader_time_ms() {
1026 1026 return UsePerfData ?
1027 1027 Management::ticks_to_ms(_perf_accumulated_time->get_value()) : -1;
1028 1028 }
1029 1029
1030 1030 jlong ClassLoader::class_init_count() {
1031 1031 return UsePerfData ? _perf_classes_inited->get_value() : -1;
1032 1032 }
1033 1033
1034 1034 jlong ClassLoader::class_init_time_ms() {
1035 1035 return UsePerfData ?
1036 1036 Management::ticks_to_ms(_perf_class_init_time->get_value()) : -1;
1037 1037 }
1038 1038
1039 1039 jlong ClassLoader::class_verify_time_ms() {
1040 1040 return UsePerfData ?
1041 1041 Management::ticks_to_ms(_perf_class_verify_time->get_value()) : -1;
1042 1042 }
1043 1043
1044 1044 jlong ClassLoader::class_link_count() {
1045 1045 return UsePerfData ? _perf_classes_linked->get_value() : -1;
1046 1046 }
1047 1047
1048 1048 jlong ClassLoader::class_link_time_ms() {
1049 1049 return UsePerfData ?
1050 1050 Management::ticks_to_ms(_perf_class_link_time->get_value()) : -1;
1051 1051 }
1052 1052
1053 1053 int ClassLoader::compute_Object_vtable() {
1054 1054 // hardwired for JDK1.2 -- would need to duplicate class file parsing
1055 1055 // code to determine actual value from file
1056 1056 // Would be value '11' if finals were in vtable
1057 1057 int JDK_1_2_Object_vtable_size = 5;
1058 1058 return JDK_1_2_Object_vtable_size * vtableEntry::size();
1059 1059 }
1060 1060
1061 1061
1062 1062 void classLoader_init() {
1063 1063 ClassLoader::initialize();
1064 1064 }
1065 1065
1066 1066
1067 1067 bool ClassLoader::get_canonical_path(char* orig, char* out, int len) {
1068 1068 assert(orig != NULL && out != NULL && len > 0, "bad arguments");
1069 1069 if (CanonicalizeEntry != NULL) {
1070 1070 JNIEnv* env = JavaThread::current()->jni_environment();
1071 1071 if ((CanonicalizeEntry)(env, os::native_path(orig), out, len) < 0) {
1072 1072 return false;
1073 1073 }
1074 1074 } else {
1075 1075 // On JDK 1.2.2 the Canonicalize does not exist, so just do nothing
1076 1076 strncpy(out, orig, len);
1077 1077 out[len - 1] = '\0';
1078 1078 }
1079 1079 return true;
1080 1080 }
1081 1081
1082 1082 #ifndef PRODUCT
1083 1083
1084 1084 void ClassLoader::verify() {
1085 1085 _package_hash_table->verify();
1086 1086 }
1087 1087
1088 1088
1089 1089 // CompileTheWorld
1090 1090 //
1091 1091 // Iterates over all class path entries and forces compilation of all methods
1092 1092 // in all classes found. Currently, only zip/jar archives are searched.
1093 1093 //
1094 1094 // The classes are loaded by the Java level bootstrap class loader, and the
1095 1095 // initializer is called. If DelayCompilationDuringStartup is true (default),
1096 1096 // the interpreter will run the initialization code. Note that forcing
1097 1097 // initialization in this way could potentially lead to initialization order
1098 1098 // problems, in which case we could just force the initialization bit to be set.
1099 1099
1100 1100
1101 1101 // We need to iterate over the contents of a zip/jar file, so we replicate the
1102 1102 // jzcell and jzfile definitions from zip_util.h but rename jzfile to real_jzfile,
1103 1103 // since jzfile already has a void* definition.
1104 1104 //
1105 1105 // Note that this is only used in debug mode.
1106 1106 //
1107 1107 // HotSpot integration note:
1108 1108 // Matches zip_util.h 1.14 99/06/01 from jdk1.3 beta H build
1109 1109
1110 1110
1111 1111 // JDK 1.3 version
1112 1112 typedef struct real_jzentry13 { /* Zip file entry */
1113 1113 char *name; /* entry name */
1114 1114 jint time; /* modification time */
1115 1115 jint size; /* size of uncompressed data */
1116 1116 jint csize; /* size of compressed data (zero if uncompressed) */
1117 1117 jint crc; /* crc of uncompressed data */
1118 1118 char *comment; /* optional zip file comment */
1119 1119 jbyte *extra; /* optional extra data */
1120 1120 jint pos; /* position of LOC header (if negative) or data */
1121 1121 } real_jzentry13;
1122 1122
1123 1123 typedef struct real_jzfile13 { /* Zip file */
1124 1124 char *name; /* zip file name */
1125 1125 jint refs; /* number of active references */
1126 1126 jint fd; /* open file descriptor */
1127 1127 void *lock; /* read lock */
1128 1128 char *comment; /* zip file comment */
1129 1129 char *msg; /* zip error message */
1130 1130 void *entries; /* array of hash cells */
1131 1131 jint total; /* total number of entries */
1132 1132 unsigned short *table; /* Hash chain heads: indexes into entries */
1133 1133 jint tablelen; /* number of hash eads */
1134 1134 real_jzfile13 *next; /* next zip file in search list */
1135 1135 jzentry *cache; /* we cache the most recently freed jzentry */
1136 1136 /* Information on metadata names in META-INF directory */
1137 1137 char **metanames; /* array of meta names (may have null names) */
1138 1138 jint metacount; /* number of slots in metanames array */
1139 1139 /* If there are any per-entry comments, they are in the comments array */
1140 1140 char **comments;
1141 1141 } real_jzfile13;
1142 1142
1143 1143 // JDK 1.2 version
1144 1144 typedef struct real_jzentry12 { /* Zip file entry */
1145 1145 char *name; /* entry name */
1146 1146 jint time; /* modification time */
1147 1147 jint size; /* size of uncompressed data */
1148 1148 jint csize; /* size of compressed data (zero if uncompressed) */
1149 1149 jint crc; /* crc of uncompressed data */
1150 1150 char *comment; /* optional zip file comment */
1151 1151 jbyte *extra; /* optional extra data */
1152 1152 jint pos; /* position of LOC header (if negative) or data */
1153 1153 struct real_jzentry12 *next; /* next entry in hash table */
1154 1154 } real_jzentry12;
1155 1155
1156 1156 typedef struct real_jzfile12 { /* Zip file */
1157 1157 char *name; /* zip file name */
1158 1158 jint refs; /* number of active references */
1159 1159 jint fd; /* open file descriptor */
1160 1160 void *lock; /* read lock */
1161 1161 char *comment; /* zip file comment */
1162 1162 char *msg; /* zip error message */
1163 1163 real_jzentry12 *entries; /* array of zip entries */
1164 1164 jint total; /* total number of entries */
1165 1165 real_jzentry12 **table; /* hash table of entries */
1166 1166 jint tablelen; /* number of buckets */
1167 1167 jzfile *next; /* next zip file in search list */
1168 1168 } real_jzfile12;
1169 1169
1170 1170
1171 1171 void ClassPathDirEntry::compile_the_world(Handle loader, TRAPS) {
1172 1172 // For now we only compile all methods in all classes in zip/jar files
1173 1173 tty->print_cr("CompileTheWorld : Skipped classes in %s", _dir);
1174 1174 tty->cr();
1175 1175 }
1176 1176
1177 1177
1178 1178 bool ClassPathDirEntry::is_rt_jar() {
1179 1179 return false;
1180 1180 }
1181 1181
1182 1182 void ClassPathZipEntry::compile_the_world(Handle loader, TRAPS) {
1183 1183 if (JDK_Version::is_jdk12x_version()) {
1184 1184 compile_the_world12(loader, THREAD);
1185 1185 } else {
1186 1186 compile_the_world13(loader, THREAD);
1187 1187 }
1188 1188 if (HAS_PENDING_EXCEPTION) {
1189 1189 if (PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())) {
1190 1190 CLEAR_PENDING_EXCEPTION;
1191 1191 tty->print_cr("\nCompileTheWorld : Ran out of memory\n");
1192 1192 size_t used = Universe::heap()->permanent_used();
1193 1193 size_t capacity = Universe::heap()->permanent_capacity();
1194 1194 tty->print_cr("Permanent generation used %dK of %dK", used/K, capacity/K);
1195 1195 tty->print_cr("Increase size by setting e.g. -XX:MaxPermSize=%dK\n", capacity*2/K);
1196 1196 } else {
1197 1197 tty->print_cr("\nCompileTheWorld : Unexpected exception occurred\n");
1198 1198 }
1199 1199 }
1200 1200 }
1201 1201
1202 1202 // Version that works for JDK 1.3.x
1203 1203 void ClassPathZipEntry::compile_the_world13(Handle loader, TRAPS) {
1204 1204 real_jzfile13* zip = (real_jzfile13*) _zip;
1205 1205 tty->print_cr("CompileTheWorld : Compiling all classes in %s", zip->name);
1206 1206 tty->cr();
1207 1207 // Iterate over all entries in zip file
1208 1208 for (int n = 0; ; n++) {
1209 1209 real_jzentry13 * ze = (real_jzentry13 *)((*GetNextEntry)(_zip, n));
1210 1210 if (ze == NULL) break;
1211 1211 ClassLoader::compile_the_world_in(ze->name, loader, CHECK);
1212 1212 }
1213 1213 }
1214 1214
1215 1215
1216 1216 // Version that works for JDK 1.2.x
1217 1217 void ClassPathZipEntry::compile_the_world12(Handle loader, TRAPS) {
1218 1218 real_jzfile12* zip = (real_jzfile12*) _zip;
1219 1219 tty->print_cr("CompileTheWorld : Compiling all classes in %s", zip->name);
1220 1220 tty->cr();
1221 1221 // Iterate over all entries in zip file
1222 1222 for (int n = 0; ; n++) {
1223 1223 real_jzentry12 * ze = (real_jzentry12 *)((*GetNextEntry)(_zip, n));
1224 1224 if (ze == NULL) break;
1225 1225 ClassLoader::compile_the_world_in(ze->name, loader, CHECK);
1226 1226 }
1227 1227 }
1228 1228
1229 1229 bool ClassPathZipEntry::is_rt_jar() {
1230 1230 if (JDK_Version::is_jdk12x_version()) {
1231 1231 return is_rt_jar12();
1232 1232 } else {
1233 1233 return is_rt_jar13();
1234 1234 }
1235 1235 }
1236 1236
1237 1237 // JDK 1.3 version
1238 1238 bool ClassPathZipEntry::is_rt_jar13() {
1239 1239 real_jzfile13* zip = (real_jzfile13*) _zip;
1240 1240 int len = (int)strlen(zip->name);
1241 1241 // Check whether zip name ends in "rt.jar"
1242 1242 // This will match other archives named rt.jar as well, but this is
1243 1243 // only used for debugging.
1244 1244 return (len >= 6) && (strcasecmp(zip->name + len - 6, "rt.jar") == 0);
1245 1245 }
1246 1246
1247 1247 // JDK 1.2 version
1248 1248 bool ClassPathZipEntry::is_rt_jar12() {
1249 1249 real_jzfile12* zip = (real_jzfile12*) _zip;
1250 1250 int len = (int)strlen(zip->name);
1251 1251 // Check whether zip name ends in "rt.jar"
1252 1252 // This will match other archives named rt.jar as well, but this is
1253 1253 // only used for debugging.
1254 1254 return (len >= 6) && (strcasecmp(zip->name + len - 6, "rt.jar") == 0);
1255 1255 }
1256 1256
1257 1257 void LazyClassPathEntry::compile_the_world(Handle loader, TRAPS) {
1258 1258 resolve_entry()->compile_the_world(loader, CHECK);
1259 1259 }
1260 1260
1261 1261 bool LazyClassPathEntry::is_rt_jar() {
1262 1262 return resolve_entry()->is_rt_jar();
1263 1263 }
1264 1264
1265 1265 void ClassLoader::compile_the_world() {
1266 1266 EXCEPTION_MARK;
1267 1267 HandleMark hm(THREAD);
1268 1268 ResourceMark rm(THREAD);
1269 1269 // Make sure we don't run with background compilation
1270 1270 BackgroundCompilation = false;
1271 1271 // Find bootstrap loader
1272 1272 Handle system_class_loader (THREAD, SystemDictionary::java_system_loader());
1273 1273 // Iterate over all bootstrap class path entries
1274 1274 ClassPathEntry* e = _first_entry;
1275 1275 while (e != NULL) {
1276 1276 // We stop at rt.jar, unless it is the first bootstrap path entry
1277 1277 if (e->is_rt_jar() && e != _first_entry) break;
1278 1278 e->compile_the_world(system_class_loader, CATCH);
1279 1279 e = e->next();
1280 1280 }
1281 1281 tty->print_cr("CompileTheWorld : Done");
1282 1282 {
1283 1283 // Print statistics as if before normal exit:
1284 1284 extern void print_statistics();
1285 1285 print_statistics();
1286 1286 }
1287 1287 vm_exit(0);
1288 1288 }
1289 1289
1290 1290 int ClassLoader::_compile_the_world_counter = 0;
1291 1291 static int _codecache_sweep_counter = 0;
1292 1292
1293 1293 // Filter out all exceptions except OOMs
1294 1294 static void clear_pending_exception_if_not_oom(TRAPS) {
1295 1295 if (HAS_PENDING_EXCEPTION &&
1296 1296 !PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())) {
1297 1297 CLEAR_PENDING_EXCEPTION;
1298 1298 }
1299 1299 // The CHECK at the caller will propagate the exception out
1300 1300 }
1301 1301
1302 1302 void ClassLoader::compile_the_world_in(char* name, Handle loader, TRAPS) {
1303 1303 int len = (int)strlen(name);
1304 1304 if (len > 6 && strcmp(".class", name + len - 6) == 0) {
1305 1305 // We have a .class file
1306 1306 char buffer[2048];
1307 1307 strncpy(buffer, name, len - 6);
1308 1308 buffer[len-6] = 0;
1309 1309 // If the file has a period after removing .class, it's not really a
1310 1310 // valid class file. The class loader will check everything else.
1311 1311 if (strchr(buffer, '.') == NULL) {
1312 1312 _compile_the_world_counter++;
1313 1313 if (_compile_the_world_counter > CompileTheWorldStopAt) return;
1314 1314
1315 1315 // Construct name without extension
1316 1316 TempNewSymbol sym = SymbolTable::new_symbol(buffer, CHECK);
1317 1317 // Use loader to load and initialize class
1318 1318 klassOop ik = SystemDictionary::resolve_or_null(sym, loader, Handle(), THREAD);
1319 1319 instanceKlassHandle k (THREAD, ik);
1320 1320 if (k.not_null() && !HAS_PENDING_EXCEPTION) {
1321 1321 k->initialize(THREAD);
1322 1322 }
1323 1323 bool exception_occurred = HAS_PENDING_EXCEPTION;
1324 1324 clear_pending_exception_if_not_oom(CHECK);
1325 1325 if (CompileTheWorldPreloadClasses && k.not_null()) {
1326 1326 constantPoolKlass::preload_and_initialize_all_classes(k->constants(), THREAD);
1327 1327 if (HAS_PENDING_EXCEPTION) {
1328 1328 // If something went wrong in preloading we just ignore it
1329 1329 clear_pending_exception_if_not_oom(CHECK);
1330 1330 tty->print_cr("Preloading failed for (%d) %s", _compile_the_world_counter, buffer);
1331 1331 }
1332 1332 }
1333 1333
1334 1334 if (_compile_the_world_counter >= CompileTheWorldStartAt) {
1335 1335 if (k.is_null() || exception_occurred) {
1336 1336 // If something went wrong (e.g. ExceptionInInitializerError) we skip this class
1337 1337 tty->print_cr("CompileTheWorld (%d) : Skipping %s", _compile_the_world_counter, buffer);
1338 1338 } else {
1339 1339 tty->print_cr("CompileTheWorld (%d) : %s", _compile_the_world_counter, buffer);
1340 1340 // Preload all classes to get around uncommon traps
1341 1341 // Iterate over all methods in class
1342 1342 for (int n = 0; n < k->methods()->length(); n++) {
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1343 1343 methodHandle m (THREAD, methodOop(k->methods()->obj_at(n)));
1344 1344 if (CompilationPolicy::can_be_compiled(m)) {
1345 1345
1346 1346 if (++_codecache_sweep_counter == CompileTheWorldSafepointInterval) {
1347 1347 // Give sweeper a chance to keep up with CTW
1348 1348 VM_ForceSafepoint op;
1349 1349 VMThread::execute(&op);
1350 1350 _codecache_sweep_counter = 0;
1351 1351 }
1352 1352 // Force compilation
1353 - CompileBroker::compile_method(m, InvocationEntryBci, CompLevel_initial_compile,
1353 + CompileBroker::compile_method(m, InvocationEntryBci, CompilationPolicy::policy()->initial_compile_level(),
1354 1354 methodHandle(), 0, "CTW", THREAD);
1355 1355 if (HAS_PENDING_EXCEPTION) {
1356 1356 clear_pending_exception_if_not_oom(CHECK);
1357 1357 tty->print_cr("CompileTheWorld (%d) : Skipping method: %s", _compile_the_world_counter, m->name()->as_C_string());
1358 1358 }
1359 - if (TieredCompilation) {
1359 + if (TieredCompilation && TieredStopAtLevel >= CompLevel_full_optimization) {
1360 1360 // Clobber the first compile and force second tier compilation
1361 1361 nmethod* nm = m->code();
1362 1362 if (nm != NULL) {
1363 1363 // Throw out the code so that the code cache doesn't fill up
1364 1364 nm->make_not_entrant();
1365 1365 m->clear_code();
1366 1366 }
1367 1367 CompileBroker::compile_method(m, InvocationEntryBci, CompLevel_full_optimization,
1368 1368 methodHandle(), 0, "CTW", THREAD);
1369 1369 if (HAS_PENDING_EXCEPTION) {
1370 1370 clear_pending_exception_if_not_oom(CHECK);
1371 1371 tty->print_cr("CompileTheWorld (%d) : Skipping method: %s", _compile_the_world_counter, m->name()->as_C_string());
1372 1372 }
1373 1373 }
1374 1374 }
1375 1375
1376 1376 nmethod* nm = m->code();
1377 1377 if (nm != NULL) {
1378 1378 // Throw out the code so that the code cache doesn't fill up
1379 1379 nm->make_not_entrant();
1380 1380 m->clear_code();
1381 1381 }
1382 1382 }
1383 1383 }
1384 1384 }
1385 1385 }
1386 1386 }
1387 1387 }
1388 1388
1389 1389 #endif //PRODUCT
1390 1390
1391 1391 // Please keep following two functions at end of this file. With them placed at top or in middle of the file,
1392 1392 // they could get inlined by agressive compiler, an unknown trick, see bug 6966589.
1393 1393 void PerfClassTraceTime::initialize() {
1394 1394 if (!UsePerfData) return;
1395 1395
1396 1396 if (_eventp != NULL) {
1397 1397 // increment the event counter
1398 1398 _eventp->inc();
1399 1399 }
1400 1400
1401 1401 // stop the current active thread-local timer to measure inclusive time
1402 1402 _prev_active_event = -1;
1403 1403 for (int i=0; i < EVENT_TYPE_COUNT; i++) {
1404 1404 if (_timers[i].is_active()) {
1405 1405 assert(_prev_active_event == -1, "should have only one active timer");
1406 1406 _prev_active_event = i;
1407 1407 _timers[i].stop();
1408 1408 }
1409 1409 }
1410 1410
1411 1411 if (_recursion_counters == NULL || (_recursion_counters[_event_type])++ == 0) {
1412 1412 // start the inclusive timer if not recursively called
1413 1413 _t.start();
1414 1414 }
1415 1415
1416 1416 // start thread-local timer of the given event type
1417 1417 if (!_timers[_event_type].is_active()) {
1418 1418 _timers[_event_type].start();
1419 1419 }
1420 1420 }
1421 1421
1422 1422 PerfClassTraceTime::~PerfClassTraceTime() {
1423 1423 if (!UsePerfData) return;
1424 1424
1425 1425 // stop the thread-local timer as the event completes
1426 1426 // and resume the thread-local timer of the event next on the stack
1427 1427 _timers[_event_type].stop();
1428 1428 jlong selftime = _timers[_event_type].ticks();
1429 1429
1430 1430 if (_prev_active_event >= 0) {
1431 1431 _timers[_prev_active_event].start();
1432 1432 }
1433 1433
1434 1434 if (_recursion_counters != NULL && --(_recursion_counters[_event_type]) > 0) return;
1435 1435
1436 1436 // increment the counters only on the leaf call
1437 1437 _t.stop();
1438 1438 _timep->inc(_t.ticks());
1439 1439 if (_selftimep != NULL) {
1440 1440 _selftimep->inc(selftime);
1441 1441 }
1442 1442 // add all class loading related event selftime to the accumulated time counter
1443 1443 ClassLoader::perf_accumulated_time()->inc(selftime);
1444 1444
1445 1445 // reset the timer
1446 1446 _timers[_event_type].reset();
1447 1447 }
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