1 /*
2 * Copyright (c) 1997, 2012, 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_bsd
72 # include "os_bsd.inline.hpp"
73 #endif
74
75
76 // Entry points in zip.dll for loading zip/jar file entries
77
78 typedef void * * (JNICALL *ZipOpen_t)(const char *name, char **pmsg);
79 typedef void (JNICALL *ZipClose_t)(jzfile *zip);
80 typedef jzentry* (JNICALL *FindEntry_t)(jzfile *zip, const char *name, jint *sizeP, jint *nameLen);
81 typedef jboolean (JNICALL *ReadEntry_t)(jzfile *zip, jzentry *entry, unsigned char *buf, char *namebuf);
82 typedef jboolean (JNICALL *ReadMappedEntry_t)(jzfile *zip, jzentry *entry, unsigned char **buf, char *namebuf);
83 typedef jzentry* (JNICALL *GetNextEntry_t)(jzfile *zip, jint n);
84
85 static ZipOpen_t ZipOpen = NULL;
86 static ZipClose_t ZipClose = NULL;
87 static FindEntry_t FindEntry = NULL;
88 static ReadEntry_t ReadEntry = NULL;
89 static ReadMappedEntry_t ReadMappedEntry = NULL;
90 static GetNextEntry_t GetNextEntry = NULL;
91 static canonicalize_fn_t CanonicalizeEntry = NULL;
92
93 // Globals
94
95 PerfCounter* ClassLoader::_perf_accumulated_time = NULL;
96 PerfCounter* ClassLoader::_perf_classes_inited = NULL;
97 PerfCounter* ClassLoader::_perf_class_init_time = NULL;
98 PerfCounter* ClassLoader::_perf_class_init_selftime = NULL;
99 PerfCounter* ClassLoader::_perf_classes_verified = NULL;
100 PerfCounter* ClassLoader::_perf_class_verify_time = NULL;
101 PerfCounter* ClassLoader::_perf_class_verify_selftime = NULL;
102 PerfCounter* ClassLoader::_perf_classes_linked = NULL;
103 PerfCounter* ClassLoader::_perf_class_link_time = NULL;
104 PerfCounter* ClassLoader::_perf_class_link_selftime = NULL;
105 PerfCounter* ClassLoader::_perf_class_parse_time = NULL;
106 PerfCounter* ClassLoader::_perf_class_parse_selftime = NULL;
107 PerfCounter* ClassLoader::_perf_sys_class_lookup_time = NULL;
108 PerfCounter* ClassLoader::_perf_shared_classload_time = NULL;
109 PerfCounter* ClassLoader::_perf_sys_classload_time = NULL;
110 PerfCounter* ClassLoader::_perf_app_classload_time = NULL;
111 PerfCounter* ClassLoader::_perf_app_classload_selftime = NULL;
112 PerfCounter* ClassLoader::_perf_app_classload_count = NULL;
113 PerfCounter* ClassLoader::_perf_define_appclasses = NULL;
114 PerfCounter* ClassLoader::_perf_define_appclass_time = NULL;
115 PerfCounter* ClassLoader::_perf_define_appclass_selftime = NULL;
116 PerfCounter* ClassLoader::_perf_app_classfile_bytes_read = NULL;
117 PerfCounter* ClassLoader::_perf_sys_classfile_bytes_read = NULL;
118 PerfCounter* ClassLoader::_sync_systemLoaderLockContentionRate = NULL;
119 PerfCounter* ClassLoader::_sync_nonSystemLoaderLockContentionRate = NULL;
120 PerfCounter* ClassLoader::_sync_JVMFindLoadedClassLockFreeCounter = NULL;
121 PerfCounter* ClassLoader::_sync_JVMDefineClassLockFreeCounter = NULL;
122 PerfCounter* ClassLoader::_sync_JNIDefineClassLockFreeCounter = NULL;
123 PerfCounter* ClassLoader::_unsafe_defineClassCallCounter = NULL;
124 PerfCounter* ClassLoader::_isUnsyncloadClass = NULL;
125 PerfCounter* ClassLoader::_load_instance_class_failCounter = NULL;
126
127 ClassPathEntry* ClassLoader::_first_entry = NULL;
128 ClassPathEntry* ClassLoader::_last_entry = NULL;
129 PackageHashtable* ClassLoader::_package_hash_table = NULL;
130
131 // helper routines
132 bool string_starts_with(const char* str, const char* str_to_find) {
133 size_t str_len = strlen(str);
134 size_t str_to_find_len = strlen(str_to_find);
135 if (str_to_find_len > str_len) {
136 return false;
137 }
138 return (strncmp(str, str_to_find, str_to_find_len) == 0);
139 }
140
141 bool string_ends_with(const char* str, const char* str_to_find) {
142 size_t str_len = strlen(str);
143 size_t str_to_find_len = strlen(str_to_find);
144 if (str_to_find_len > str_len) {
145 return false;
146 }
147 return (strncmp(str + (str_len - str_to_find_len), str_to_find, str_to_find_len) == 0);
148 }
149
150
151 MetaIndex::MetaIndex(char** meta_package_names, int num_meta_package_names) {
152 if (num_meta_package_names == 0) {
153 _meta_package_names = NULL;
154 _num_meta_package_names = 0;
155 } else {
156 _meta_package_names = NEW_C_HEAP_ARRAY(char*, num_meta_package_names, mtClass);
157 _num_meta_package_names = num_meta_package_names;
158 memcpy(_meta_package_names, meta_package_names, num_meta_package_names * sizeof(char*));
159 }
160 }
161
162
163 MetaIndex::~MetaIndex() {
164 FREE_C_HEAP_ARRAY(char*, _meta_package_names, mtClass);
165 }
166
167
168 bool MetaIndex::may_contain(const char* class_name) {
169 if ( _num_meta_package_names == 0) {
170 return false;
171 }
172 size_t class_name_len = strlen(class_name);
173 for (int i = 0; i < _num_meta_package_names; i++) {
174 char* pkg = _meta_package_names[i];
175 size_t pkg_len = strlen(pkg);
176 size_t min_len = MIN2(class_name_len, pkg_len);
177 if (!strncmp(class_name, pkg, min_len)) {
178 return true;
179 }
180 }
181 return false;
182 }
183
184
185 ClassPathEntry::ClassPathEntry() {
186 set_next(NULL);
187 }
188
189
190 bool ClassPathEntry::is_lazy() {
191 return false;
192 }
193
194 ClassPathDirEntry::ClassPathDirEntry(char* dir) : ClassPathEntry() {
195 _dir = NEW_C_HEAP_ARRAY(char, strlen(dir)+1, mtClass);
196 strcpy(_dir, dir);
197 }
198
199
200 ClassFileStream* ClassPathDirEntry::open_stream(const char* name) {
201 // construct full path name
202 char path[JVM_MAXPATHLEN];
203 if (jio_snprintf(path, sizeof(path), "%s%s%s", _dir, os::file_separator(), name) == -1) {
204 return NULL;
205 }
206 // check if file exists
207 struct stat st;
208 if (os::stat(path, &st) == 0) {
209 // found file, open it
210 int file_handle = os::open(path, 0, 0);
211 if (file_handle != -1) {
212 // read contents into resource array
213 u1* buffer = NEW_RESOURCE_ARRAY(u1, st.st_size);
214 size_t num_read = os::read(file_handle, (char*) buffer, st.st_size);
215 // close file
216 os::close(file_handle);
217 // construct ClassFileStream
218 if (num_read == (size_t)st.st_size) {
219 if (UsePerfData) {
220 ClassLoader::perf_sys_classfile_bytes_read()->inc(num_read);
221 }
222 return new ClassFileStream(buffer, st.st_size, _dir); // Resource allocated
223 }
224 }
225 }
226 return NULL;
227 }
228
229
230 ClassPathZipEntry::ClassPathZipEntry(jzfile* zip, const char* zip_name) : ClassPathEntry() {
231 _zip = zip;
232 _zip_name = NEW_C_HEAP_ARRAY(char, strlen(zip_name)+1, mtClass);
233 strcpy(_zip_name, zip_name);
234 }
235
236 ClassPathZipEntry::~ClassPathZipEntry() {
237 if (ZipClose != NULL) {
238 (*ZipClose)(_zip);
239 }
240 FREE_C_HEAP_ARRAY(char, _zip_name, mtClass);
241 }
242
243 ClassFileStream* ClassPathZipEntry::open_stream(const char* name) {
244 // enable call to C land
245 JavaThread* thread = JavaThread::current();
246 ThreadToNativeFromVM ttn(thread);
247 // check whether zip archive contains name
248 jint filesize, name_len;
249 jzentry* entry = (*FindEntry)(_zip, name, &filesize, &name_len);
250 if (entry == NULL) return NULL;
251 u1* buffer;
252 char name_buf[128];
253 char* filename;
254 if (name_len < 128) {
255 filename = name_buf;
256 } else {
257 filename = NEW_RESOURCE_ARRAY(char, name_len + 1);
258 }
259
260 // file found, get pointer to class in mmaped jar file.
261 if (ReadMappedEntry == NULL ||
262 !(*ReadMappedEntry)(_zip, entry, &buffer, filename)) {
263 // mmaped access not available, perhaps due to compression,
264 // read contents into resource array
265 buffer = NEW_RESOURCE_ARRAY(u1, filesize);
266 if (!(*ReadEntry)(_zip, entry, buffer, filename)) return NULL;
267 }
268 if (UsePerfData) {
269 ClassLoader::perf_sys_classfile_bytes_read()->inc(filesize);
270 }
271 // return result
272 return new ClassFileStream(buffer, filesize, _zip_name); // Resource allocated
273 }
274
275 // invoke function for each entry in the zip file
276 void ClassPathZipEntry::contents_do(void f(const char* name, void* context), void* context) {
277 JavaThread* thread = JavaThread::current();
278 HandleMark handle_mark(thread);
279 ThreadToNativeFromVM ttn(thread);
280 for (int n = 0; ; n++) {
281 jzentry * ze = ((*GetNextEntry)(_zip, n));
282 if (ze == NULL) break;
283 (*f)(ze->name, context);
284 }
285 }
286
287 LazyClassPathEntry::LazyClassPathEntry(char* path, struct stat st) : ClassPathEntry() {
288 _path = strdup(path);
289 _st = st;
290 _meta_index = NULL;
291 _resolved_entry = NULL;
292 }
293
294 bool LazyClassPathEntry::is_jar_file() {
295 return ((_st.st_mode & S_IFREG) == S_IFREG);
296 }
297
298 ClassPathEntry* LazyClassPathEntry::resolve_entry() {
299 if (_resolved_entry != NULL) {
300 return (ClassPathEntry*) _resolved_entry;
301 }
302 ClassPathEntry* new_entry = NULL;
303 ClassLoader::create_class_path_entry(_path, _st, &new_entry, false);
304 assert(new_entry != NULL, "earlier code should have caught this");
305 {
306 ThreadCritical tc;
307 if (_resolved_entry == NULL) {
308 _resolved_entry = new_entry;
309 return new_entry;
310 }
311 }
312 assert(_resolved_entry != NULL, "bug in MT-safe resolution logic");
313 delete new_entry;
314 return (ClassPathEntry*) _resolved_entry;
315 }
316
317 ClassFileStream* LazyClassPathEntry::open_stream(const char* name) {
318 if (_meta_index != NULL &&
319 !_meta_index->may_contain(name)) {
320 return NULL;
321 }
322 return resolve_entry()->open_stream(name);
323 }
324
325 bool LazyClassPathEntry::is_lazy() {
326 return true;
327 }
328
329 static void print_meta_index(LazyClassPathEntry* entry,
330 GrowableArray<char*>& meta_packages) {
331 tty->print("[Meta index for %s=", entry->name());
332 for (int i = 0; i < meta_packages.length(); i++) {
333 if (i > 0) tty->print(" ");
334 tty->print(meta_packages.at(i));
335 }
336 tty->print_cr("]");
337 }
338
339
340 void ClassLoader::setup_meta_index() {
341 // Set up meta index which allows us to open boot jars lazily if
342 // class data sharing is enabled
343 const char* known_version = "% VERSION 2";
344 char* meta_index_path = Arguments::get_meta_index_path();
345 char* meta_index_dir = Arguments::get_meta_index_dir();
346 FILE* file = fopen(meta_index_path, "r");
347 int line_no = 0;
348 if (file != NULL) {
349 ResourceMark rm;
350 LazyClassPathEntry* cur_entry = NULL;
351 GrowableArray<char*> boot_class_path_packages(10);
352 char package_name[256];
353 bool skipCurrentJar = false;
354 while (fgets(package_name, sizeof(package_name), file) != NULL) {
355 ++line_no;
356 // Remove trailing newline
357 package_name[strlen(package_name) - 1] = '\0';
358 switch(package_name[0]) {
359 case '%':
360 {
361 if ((line_no == 1) && (strcmp(package_name, known_version) != 0)) {
362 if (TraceClassLoading && Verbose) {
363 tty->print("[Unsupported meta index version]");
364 }
365 fclose(file);
366 return;
367 }
368 }
369
370 // These directives indicate jar files which contain only
371 // classes, only non-classfile resources, or a combination of
372 // the two. See src/share/classes/sun/misc/MetaIndex.java and
373 // make/tools/MetaIndex/BuildMetaIndex.java in the J2SE
374 // workspace.
375 case '#':
376 case '!':
377 case '@':
378 {
379 // Hand off current packages to current lazy entry (if any)
380 if ((cur_entry != NULL) &&
381 (boot_class_path_packages.length() > 0)) {
382 if (TraceClassLoading && Verbose) {
383 print_meta_index(cur_entry, boot_class_path_packages);
384 }
385 MetaIndex* index = new MetaIndex(boot_class_path_packages.adr_at(0),
386 boot_class_path_packages.length());
387 cur_entry->set_meta_index(index);
388 }
389 cur_entry = NULL;
390 boot_class_path_packages.clear();
391
392 // Find lazy entry corresponding to this jar file
393 for (ClassPathEntry* entry = _first_entry; entry != NULL; entry = entry->next()) {
394 if (entry->is_lazy() &&
395 string_starts_with(entry->name(), meta_index_dir) &&
396 string_ends_with(entry->name(), &package_name[2])) {
397 cur_entry = (LazyClassPathEntry*) entry;
398 break;
399 }
400 }
401
402 // If the first character is '@', it indicates the following jar
403 // file is a resource only jar file in which case, we should skip
404 // reading the subsequent entries since the resource loading is
405 // totally handled by J2SE side.
406 if (package_name[0] == '@') {
407 if (cur_entry != NULL) {
408 cur_entry->set_meta_index(new MetaIndex(NULL, 0));
409 }
410 cur_entry = NULL;
411 skipCurrentJar = true;
412 } else {
413 skipCurrentJar = false;
414 }
415
416 break;
417 }
418
419 default:
420 {
421 if (!skipCurrentJar && cur_entry != NULL) {
422 char* new_name = strdup(package_name);
423 boot_class_path_packages.append(new_name);
424 }
425 }
426 }
427 }
428 // Hand off current packages to current lazy entry (if any)
429 if ((cur_entry != NULL) &&
430 (boot_class_path_packages.length() > 0)) {
431 if (TraceClassLoading && Verbose) {
432 print_meta_index(cur_entry, boot_class_path_packages);
433 }
434 MetaIndex* index = new MetaIndex(boot_class_path_packages.adr_at(0),
435 boot_class_path_packages.length());
436 cur_entry->set_meta_index(index);
437 }
438 fclose(file);
439 }
440 }
441
442 void ClassLoader::setup_bootstrap_search_path() {
443 assert(_first_entry == NULL, "should not setup bootstrap class search path twice");
444 char* sys_class_path = os::strdup(Arguments::get_sysclasspath());
445 if (TraceClassLoading && Verbose) {
446 tty->print_cr("[Bootstrap loader class path=%s]", sys_class_path);
447 }
448
449 int len = (int)strlen(sys_class_path);
450 int end = 0;
451
452 // Iterate over class path entries
453 for (int start = 0; start < len; start = end) {
454 while (sys_class_path[end] && sys_class_path[end] != os::path_separator()[0]) {
455 end++;
456 }
457 char* path = NEW_C_HEAP_ARRAY(char, end-start+1, mtClass);
458 strncpy(path, &sys_class_path[start], end-start);
459 path[end-start] = '\0';
460 update_class_path_entry_list(path, false);
461 FREE_C_HEAP_ARRAY(char, path, mtClass);
462 while (sys_class_path[end] == os::path_separator()[0]) {
463 end++;
464 }
465 }
466 }
467
468 void ClassLoader::create_class_path_entry(char *path, struct stat st, ClassPathEntry **new_entry, bool lazy) {
469 JavaThread* thread = JavaThread::current();
470 if (lazy) {
471 *new_entry = new LazyClassPathEntry(path, st);
472 return;
473 }
474 if ((st.st_mode & S_IFREG) == S_IFREG) {
475 // Regular file, should be a zip file
476 // Canonicalized filename
477 char canonical_path[JVM_MAXPATHLEN];
478 if (!get_canonical_path(path, canonical_path, JVM_MAXPATHLEN)) {
479 // This matches the classic VM
480 EXCEPTION_MARK;
481 THROW_MSG(vmSymbols::java_io_IOException(), "Bad pathname");
482 }
483 char* error_msg = NULL;
484 jzfile* zip;
485 {
486 // enable call to C land
487 ThreadToNativeFromVM ttn(thread);
488 HandleMark hm(thread);
489 zip = (*ZipOpen)(canonical_path, &error_msg);
490 }
491 if (zip != NULL && error_msg == NULL) {
492 *new_entry = new ClassPathZipEntry(zip, path);
493 if (TraceClassLoading) {
494 tty->print_cr("[Opened %s]", path);
495 }
496 } else {
497 ResourceMark rm(thread);
498 char *msg;
499 if (error_msg == NULL) {
500 msg = NEW_RESOURCE_ARRAY(char, strlen(path) + 128); ;
501 jio_snprintf(msg, strlen(path) + 127, "error in opening JAR file %s", path);
502 } else {
503 int len = (int)(strlen(path) + strlen(error_msg) + 128);
504 msg = NEW_RESOURCE_ARRAY(char, len); ;
505 jio_snprintf(msg, len - 1, "error in opening JAR file <%s> %s", error_msg, path);
506 }
507 EXCEPTION_MARK;
508 THROW_MSG(vmSymbols::java_lang_ClassNotFoundException(), msg);
509 }
510 } else {
511 // Directory
512 *new_entry = new ClassPathDirEntry(path);
513 if (TraceClassLoading) {
514 tty->print_cr("[Path %s]", path);
515 }
516 }
517 }
518
519
520 // Create a class path zip entry for a given path (return NULL if not found
521 // or zip/JAR file cannot be opened)
522 ClassPathZipEntry* ClassLoader::create_class_path_zip_entry(const char *path) {
523 // check for a regular file
524 struct stat st;
525 if (os::stat(path, &st) == 0) {
526 if ((st.st_mode & S_IFREG) == S_IFREG) {
527 char orig_path[JVM_MAXPATHLEN];
528 char canonical_path[JVM_MAXPATHLEN];
529
530 strcpy(orig_path, path);
531 if (get_canonical_path(orig_path, canonical_path, JVM_MAXPATHLEN)) {
532 char* error_msg = NULL;
533 jzfile* zip;
534 {
535 // enable call to C land
536 JavaThread* thread = JavaThread::current();
537 ThreadToNativeFromVM ttn(thread);
538 HandleMark hm(thread);
539 zip = (*ZipOpen)(canonical_path, &error_msg);
540 }
541 if (zip != NULL && error_msg == NULL) {
542 // create using canonical path
543 return new ClassPathZipEntry(zip, canonical_path);
544 }
545 }
546 }
547 }
548 return NULL;
549 }
550
551 // returns true if entry already on class path
552 bool ClassLoader::contains_entry(ClassPathEntry *entry) {
553 ClassPathEntry* e = _first_entry;
554 while (e != NULL) {
555 // assume zip entries have been canonicalized
556 if (strcmp(entry->name(), e->name()) == 0) {
557 return true;
558 }
559 e = e->next();
560 }
561 return false;
562 }
563
564 void ClassLoader::add_to_list(ClassPathEntry *new_entry) {
565 if (new_entry != NULL) {
566 if (_last_entry == NULL) {
567 _first_entry = _last_entry = new_entry;
568 } else {
569 _last_entry->set_next(new_entry);
570 _last_entry = new_entry;
571 }
572 }
573 }
574
575 void ClassLoader::update_class_path_entry_list(const char *path,
576 bool check_for_duplicates) {
577 struct stat st;
578 if (os::stat((char *)path, &st) == 0) {
579 // File or directory found
580 ClassPathEntry* new_entry = NULL;
581 create_class_path_entry((char *)path, st, &new_entry, LazyBootClassLoader);
582 // The kernel VM adds dynamically to the end of the classloader path and
583 // doesn't reorder the bootclasspath which would break java.lang.Package
584 // (see PackageInfo).
585 // Add new entry to linked list
586 if (!check_for_duplicates || !contains_entry(new_entry)) {
587 add_to_list(new_entry);
588 }
589 }
590 }
591
592 void ClassLoader::print_bootclasspath() {
593 ClassPathEntry* e = _first_entry;
594 tty->print("[bootclasspath= ");
595 while (e != NULL) {
596 tty->print("%s ;", e->name());
597 e = e->next();
598 }
599 tty->print_cr("]");
600 }
601
602 void ClassLoader::load_zip_library() {
603 assert(ZipOpen == NULL, "should not load zip library twice");
604 // First make sure native library is loaded
605 os::native_java_library();
606 // Load zip library
607 char path[JVM_MAXPATHLEN];
608 char ebuf[1024];
609 void* handle = NULL;
610 if (os::dll_build_name(path, sizeof(path), Arguments::get_dll_dir(), "zip")) {
611 handle = os::dll_load(path, ebuf, sizeof ebuf);
612 }
613 if (handle == NULL) {
614 vm_exit_during_initialization("Unable to load ZIP library", path);
615 }
616 // Lookup zip entry points
617 ZipOpen = CAST_TO_FN_PTR(ZipOpen_t, os::dll_lookup(handle, "ZIP_Open"));
618 ZipClose = CAST_TO_FN_PTR(ZipClose_t, os::dll_lookup(handle, "ZIP_Close"));
619 FindEntry = CAST_TO_FN_PTR(FindEntry_t, os::dll_lookup(handle, "ZIP_FindEntry"));
620 ReadEntry = CAST_TO_FN_PTR(ReadEntry_t, os::dll_lookup(handle, "ZIP_ReadEntry"));
621 ReadMappedEntry = CAST_TO_FN_PTR(ReadMappedEntry_t, os::dll_lookup(handle, "ZIP_ReadMappedEntry"));
622 GetNextEntry = CAST_TO_FN_PTR(GetNextEntry_t, os::dll_lookup(handle, "ZIP_GetNextEntry"));
623
624 // ZIP_Close is not exported on Windows in JDK5.0 so don't abort if ZIP_Close is NULL
625 if (ZipOpen == NULL || FindEntry == NULL || ReadEntry == NULL || GetNextEntry == NULL) {
626 vm_exit_during_initialization("Corrupted ZIP library", path);
627 }
628
629 // Lookup canonicalize entry in libjava.dll
630 void *javalib_handle = os::native_java_library();
631 CanonicalizeEntry = CAST_TO_FN_PTR(canonicalize_fn_t, os::dll_lookup(javalib_handle, "Canonicalize"));
632 // This lookup only works on 1.3. Do not check for non-null here
633 }
634
635 // PackageInfo data exists in order to support the java.lang.Package
636 // class. A Package object provides information about a java package
637 // (version, vendor, etc.) which originates in the manifest of the jar
638 // file supplying the package. For application classes, the ClassLoader
639 // object takes care of this.
640
641 // For system (boot) classes, the Java code in the Package class needs
642 // to be able to identify which source jar file contained the boot
643 // class, so that it can extract the manifest from it. This table
644 // identifies java packages with jar files in the boot classpath.
645
646 // Because the boot classpath cannot change, the classpath index is
647 // sufficient to identify the source jar file or directory. (Since
648 // directories have no manifests, the directory name is not required,
649 // but is available.)
650
651 // When using sharing -- the pathnames of entries in the boot classpath
652 // may not be the same at runtime as they were when the archive was
653 // created (NFS, Samba, etc.). The actual files and directories named
654 // in the classpath must be the same files, in the same order, even
655 // though the exact name is not the same.
656
657 class PackageInfo: public BasicHashtableEntry<mtClass> {
658 public:
659 const char* _pkgname; // Package name
660 int _classpath_index; // Index of directory or JAR file loaded from
661
662 PackageInfo* next() {
663 return (PackageInfo*)BasicHashtableEntry<mtClass>::next();
664 }
665
666 const char* pkgname() { return _pkgname; }
667 void set_pkgname(char* pkgname) { _pkgname = pkgname; }
668
669 const char* filename() {
670 return ClassLoader::classpath_entry(_classpath_index)->name();
671 }
672
673 void set_index(int index) {
674 _classpath_index = index;
675 }
676 };
677
678
679 class PackageHashtable : public BasicHashtable<mtClass> {
680 private:
681 inline unsigned int compute_hash(const char *s, int n) {
682 unsigned int val = 0;
683 while (--n >= 0) {
684 val = *s++ + 31 * val;
685 }
686 return val;
687 }
688
689 PackageInfo* bucket(int index) {
690 return (PackageInfo*)BasicHashtable<mtClass>::bucket(index);
691 }
692
693 PackageInfo* get_entry(int index, unsigned int hash,
694 const char* pkgname, size_t n) {
695 for (PackageInfo* pp = bucket(index); pp != NULL; pp = pp->next()) {
696 if (pp->hash() == hash &&
697 strncmp(pkgname, pp->pkgname(), n) == 0 &&
698 pp->pkgname()[n] == '\0') {
699 return pp;
700 }
701 }
702 return NULL;
703 }
704
705 public:
706 PackageHashtable(int table_size)
707 : BasicHashtable<mtClass>(table_size, sizeof(PackageInfo)) {}
708
709 PackageHashtable(int table_size, HashtableBucket<mtClass>* t, int number_of_entries)
710 : BasicHashtable<mtClass>(table_size, sizeof(PackageInfo), t, number_of_entries) {}
711
712 PackageInfo* get_entry(const char* pkgname, int n) {
713 unsigned int hash = compute_hash(pkgname, n);
714 return get_entry(hash_to_index(hash), hash, pkgname, n);
715 }
716
717 PackageInfo* new_entry(char* pkgname, int n) {
718 unsigned int hash = compute_hash(pkgname, n);
719 PackageInfo* pp;
720 pp = (PackageInfo*)BasicHashtable<mtClass>::new_entry(hash);
721 pp->set_pkgname(pkgname);
722 return pp;
723 }
724
725 void add_entry(PackageInfo* pp) {
726 int index = hash_to_index(pp->hash());
727 BasicHashtable<mtClass>::add_entry(index, pp);
728 }
729
730 void copy_pkgnames(const char** packages) {
731 int n = 0;
732 for (int i = 0; i < table_size(); ++i) {
733 for (PackageInfo* pp = bucket(i); pp != NULL; pp = pp->next()) {
734 packages[n++] = pp->pkgname();
735 }
736 }
737 assert(n == number_of_entries(), "just checking");
738 }
739
740 void copy_table(char** top, char* end, PackageHashtable* table);
741 };
742
743
744 void PackageHashtable::copy_table(char** top, char* end,
745 PackageHashtable* table) {
746 // Copy (relocate) the table to the shared space.
747 BasicHashtable<mtClass>::copy_table(top, end);
748
749 // Calculate the space needed for the package name strings.
750 int i;
751 int n = 0;
752 for (i = 0; i < table_size(); ++i) {
753 for (PackageInfo* pp = table->bucket(i);
754 pp != NULL;
755 pp = pp->next()) {
756 n += (int)(strlen(pp->pkgname()) + 1);
757 }
758 }
759 if (*top + n + sizeof(intptr_t) >= end) {
760 report_out_of_shared_space(SharedMiscData);
761 }
762
763 // Copy the table data (the strings) to the shared space.
764 n = align_size_up(n, sizeof(HeapWord));
765 *(intptr_t*)(*top) = n;
766 *top += sizeof(intptr_t);
767
768 for (i = 0; i < table_size(); ++i) {
769 for (PackageInfo* pp = table->bucket(i);
770 pp != NULL;
771 pp = pp->next()) {
772 int n1 = (int)(strlen(pp->pkgname()) + 1);
773 pp->set_pkgname((char*)memcpy(*top, pp->pkgname(), n1));
774 *top += n1;
775 }
776 }
777 *top = (char*)align_size_up((intptr_t)*top, sizeof(HeapWord));
778 }
779
780
781 void ClassLoader::copy_package_info_buckets(char** top, char* end) {
782 _package_hash_table->copy_buckets(top, end);
783 }
784
785 void ClassLoader::copy_package_info_table(char** top, char* end) {
786 _package_hash_table->copy_table(top, end, _package_hash_table);
787 }
788
789
790 PackageInfo* ClassLoader::lookup_package(const char *pkgname) {
791 const char *cp = strrchr(pkgname, '/');
792 if (cp != NULL) {
793 // Package prefix found
794 int n = cp - pkgname + 1;
795 return _package_hash_table->get_entry(pkgname, n);
796 }
797 return NULL;
798 }
799
800
801 bool ClassLoader::add_package(const char *pkgname, int classpath_index, TRAPS) {
802 assert(pkgname != NULL, "just checking");
803 // Bootstrap loader no longer holds system loader lock obj serializing
804 // load_instance_class and thereby add_package
805 {
806 MutexLocker ml(PackageTable_lock, THREAD);
807 // First check for previously loaded entry
808 PackageInfo* pp = lookup_package(pkgname);
809 if (pp != NULL) {
810 // Existing entry found, check source of package
811 pp->set_index(classpath_index);
812 return true;
813 }
814
815 const char *cp = strrchr(pkgname, '/');
816 if (cp != NULL) {
817 // Package prefix found
818 int n = cp - pkgname + 1;
819
820 char* new_pkgname = NEW_C_HEAP_ARRAY(char, n + 1, mtClass);
821 if (new_pkgname == NULL) {
822 return false;
823 }
824
825 memcpy(new_pkgname, pkgname, n);
826 new_pkgname[n] = '\0';
827 pp = _package_hash_table->new_entry(new_pkgname, n);
828 pp->set_index(classpath_index);
829
830 // Insert into hash table
831 _package_hash_table->add_entry(pp);
832 }
833 return true;
834 }
835 }
836
837
838 oop ClassLoader::get_system_package(const char* name, TRAPS) {
839 PackageInfo* pp;
840 {
841 MutexLocker ml(PackageTable_lock, THREAD);
842 pp = lookup_package(name);
843 }
844 if (pp == NULL) {
845 return NULL;
846 } else {
847 Handle p = java_lang_String::create_from_str(pp->filename(), THREAD);
848 return p();
849 }
850 }
851
852
853 objArrayOop ClassLoader::get_system_packages(TRAPS) {
854 ResourceMark rm(THREAD);
855 int nof_entries;
856 const char** packages;
857 {
858 MutexLocker ml(PackageTable_lock, THREAD);
859 // Allocate resource char* array containing package names
860 nof_entries = _package_hash_table->number_of_entries();
861 if ((packages = NEW_RESOURCE_ARRAY(const char*, nof_entries)) == NULL) {
862 return NULL;
863 }
864 _package_hash_table->copy_pkgnames(packages);
865 }
866 // Allocate objArray and fill with java.lang.String
867 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
868 nof_entries, CHECK_0);
869 objArrayHandle result(THREAD, r);
870 for (int i = 0; i < nof_entries; i++) {
871 Handle str = java_lang_String::create_from_str(packages[i], CHECK_0);
872 result->obj_at_put(i, str());
873 }
874
875 return result();
876 }
877
878
879 instanceKlassHandle ClassLoader::load_classfile(Symbol* h_name, TRAPS) {
880 ResourceMark rm(THREAD);
881 EventMark m("loading class " INTPTR_FORMAT, (address)h_name);
882 ThreadProfilerMark tpm(ThreadProfilerMark::classLoaderRegion);
883
884 stringStream st;
885 // st.print() uses too much stack space while handling a StackOverflowError
886 // st.print("%s.class", h_name->as_utf8());
887 st.print_raw(h_name->as_utf8());
888 st.print_raw(".class");
889 char* name = st.as_string();
890
891 // Lookup stream for parsing .class file
892 ClassFileStream* stream = NULL;
893 int classpath_index = 0;
894 {
895 PerfClassTraceTime vmtimer(perf_sys_class_lookup_time(),
896 ((JavaThread*) THREAD)->get_thread_stat()->perf_timers_addr(),
897 PerfClassTraceTime::CLASS_LOAD);
898 ClassPathEntry* e = _first_entry;
899 while (e != NULL) {
900 stream = e->open_stream(name);
901 if (stream != NULL) {
902 break;
903 }
904 e = e->next();
905 ++classpath_index;
906 }
907 }
908
909 instanceKlassHandle h;
910 if (stream != NULL) {
911
912 // class file found, parse it
913 ClassFileParser parser(stream);
914 ClassLoaderData* loader_data = ClassLoaderData::the_null_class_loader_data();
915 Handle protection_domain;
916 TempNewSymbol parsed_name = NULL;
917 instanceKlassHandle result = parser.parseClassFile(h_name,
918 loader_data,
919 protection_domain,
920 parsed_name,
921 false,
922 CHECK_(h));
923
924 // add to package table
925 if (add_package(name, classpath_index, THREAD)) {
926 h = result;
927 }
928 }
929
930 return h;
931 }
932
933
934 void ClassLoader::create_package_info_table(HashtableBucket<mtClass> *t, int length,
935 int number_of_entries) {
936 assert(_package_hash_table == NULL, "One package info table allowed.");
937 assert(length == package_hash_table_size * sizeof(HashtableBucket<mtClass>),
938 "bad shared package info size.");
939 _package_hash_table = new PackageHashtable(package_hash_table_size, t,
940 number_of_entries);
941 }
942
943
944 void ClassLoader::create_package_info_table() {
945 assert(_package_hash_table == NULL, "shouldn't have one yet");
946 _package_hash_table = new PackageHashtable(package_hash_table_size);
947 }
948
949
950 // Initialize the class loader's access to methods in libzip. Parse and
951 // process the boot classpath into a list ClassPathEntry objects. Once
952 // this list has been created, it must not change order (see class PackageInfo)
953 // it can be appended to and is by jvmti and the kernel vm.
954
955 void ClassLoader::initialize() {
956 assert(_package_hash_table == NULL, "should have been initialized by now.");
957 EXCEPTION_MARK;
958
959 if (UsePerfData) {
960 // jvmstat performance counters
961 NEWPERFTICKCOUNTER(_perf_accumulated_time, SUN_CLS, "time");
962 NEWPERFTICKCOUNTER(_perf_class_init_time, SUN_CLS, "classInitTime");
963 NEWPERFTICKCOUNTER(_perf_class_init_selftime, SUN_CLS, "classInitTime.self");
964 NEWPERFTICKCOUNTER(_perf_class_verify_time, SUN_CLS, "classVerifyTime");
965 NEWPERFTICKCOUNTER(_perf_class_verify_selftime, SUN_CLS, "classVerifyTime.self");
966 NEWPERFTICKCOUNTER(_perf_class_link_time, SUN_CLS, "classLinkedTime");
967 NEWPERFTICKCOUNTER(_perf_class_link_selftime, SUN_CLS, "classLinkedTime.self");
968 NEWPERFEVENTCOUNTER(_perf_classes_inited, SUN_CLS, "initializedClasses");
969 NEWPERFEVENTCOUNTER(_perf_classes_linked, SUN_CLS, "linkedClasses");
970 NEWPERFEVENTCOUNTER(_perf_classes_verified, SUN_CLS, "verifiedClasses");
971
972 NEWPERFTICKCOUNTER(_perf_class_parse_time, SUN_CLS, "parseClassTime");
973 NEWPERFTICKCOUNTER(_perf_class_parse_selftime, SUN_CLS, "parseClassTime.self");
974 NEWPERFTICKCOUNTER(_perf_sys_class_lookup_time, SUN_CLS, "lookupSysClassTime");
975 NEWPERFTICKCOUNTER(_perf_shared_classload_time, SUN_CLS, "sharedClassLoadTime");
976 NEWPERFTICKCOUNTER(_perf_sys_classload_time, SUN_CLS, "sysClassLoadTime");
977 NEWPERFTICKCOUNTER(_perf_app_classload_time, SUN_CLS, "appClassLoadTime");
978 NEWPERFTICKCOUNTER(_perf_app_classload_selftime, SUN_CLS, "appClassLoadTime.self");
979 NEWPERFEVENTCOUNTER(_perf_app_classload_count, SUN_CLS, "appClassLoadCount");
980 NEWPERFTICKCOUNTER(_perf_define_appclasses, SUN_CLS, "defineAppClasses");
981 NEWPERFTICKCOUNTER(_perf_define_appclass_time, SUN_CLS, "defineAppClassTime");
982 NEWPERFTICKCOUNTER(_perf_define_appclass_selftime, SUN_CLS, "defineAppClassTime.self");
983 NEWPERFBYTECOUNTER(_perf_app_classfile_bytes_read, SUN_CLS, "appClassBytes");
984 NEWPERFBYTECOUNTER(_perf_sys_classfile_bytes_read, SUN_CLS, "sysClassBytes");
985
986
987 // The following performance counters are added for measuring the impact
988 // of the bug fix of 6365597. They are mainly focused on finding out
989 // the behavior of system & user-defined classloader lock, whether
990 // ClassLoader.loadClass/findClass is being called synchronized or not.
991 // Also two additional counters are created to see whether 'UnsyncloadClass'
992 // flag is being set or not and how many times load_instance_class call
993 // fails with linkageError etc.
994 NEWPERFEVENTCOUNTER(_sync_systemLoaderLockContentionRate, SUN_CLS,
995 "systemLoaderLockContentionRate");
996 NEWPERFEVENTCOUNTER(_sync_nonSystemLoaderLockContentionRate, SUN_CLS,
997 "nonSystemLoaderLockContentionRate");
998 NEWPERFEVENTCOUNTER(_sync_JVMFindLoadedClassLockFreeCounter, SUN_CLS,
999 "jvmFindLoadedClassNoLockCalls");
1000 NEWPERFEVENTCOUNTER(_sync_JVMDefineClassLockFreeCounter, SUN_CLS,
1001 "jvmDefineClassNoLockCalls");
1002
1003 NEWPERFEVENTCOUNTER(_sync_JNIDefineClassLockFreeCounter, SUN_CLS,
1004 "jniDefineClassNoLockCalls");
1005
1006 NEWPERFEVENTCOUNTER(_unsafe_defineClassCallCounter, SUN_CLS,
1007 "unsafeDefineClassCalls");
1008
1009 NEWPERFEVENTCOUNTER(_isUnsyncloadClass, SUN_CLS, "isUnsyncloadClassSet");
1010 NEWPERFEVENTCOUNTER(_load_instance_class_failCounter, SUN_CLS,
1011 "loadInstanceClassFailRate");
1012
1013 // increment the isUnsyncloadClass counter if UnsyncloadClass is set.
1014 if (UnsyncloadClass) {
1015 _isUnsyncloadClass->inc();
1016 }
1017 }
1018
1019 // lookup zip library entry points
1020 load_zip_library();
1021 // initialize search path
1022 setup_bootstrap_search_path();
1023 if (LazyBootClassLoader) {
1024 // set up meta index which makes boot classpath initialization lazier
1025 setup_meta_index();
1026 }
1027 }
1028
1029
1030 jlong ClassLoader::classloader_time_ms() {
1031 return UsePerfData ?
1032 Management::ticks_to_ms(_perf_accumulated_time->get_value()) : -1;
1033 }
1034
1035 jlong ClassLoader::class_init_count() {
1036 return UsePerfData ? _perf_classes_inited->get_value() : -1;
1037 }
1038
1039 jlong ClassLoader::class_init_time_ms() {
1040 return UsePerfData ?
1041 Management::ticks_to_ms(_perf_class_init_time->get_value()) : -1;
1042 }
1043
1044 jlong ClassLoader::class_verify_time_ms() {
1045 return UsePerfData ?
1046 Management::ticks_to_ms(_perf_class_verify_time->get_value()) : -1;
1047 }
1048
1049 jlong ClassLoader::class_link_count() {
1050 return UsePerfData ? _perf_classes_linked->get_value() : -1;
1051 }
1052
1053 jlong ClassLoader::class_link_time_ms() {
1054 return UsePerfData ?
1055 Management::ticks_to_ms(_perf_class_link_time->get_value()) : -1;
1056 }
1057
1058 int ClassLoader::compute_Object_vtable() {
1059 // hardwired for JDK1.2 -- would need to duplicate class file parsing
1060 // code to determine actual value from file
1061 // Would be value '11' if finals were in vtable
1062 int JDK_1_2_Object_vtable_size = 5;
1063 return JDK_1_2_Object_vtable_size * vtableEntry::size();
1064 }
1065
1066
1067 void classLoader_init() {
1068 ClassLoader::initialize();
1069 }
1070
1071
1072 bool ClassLoader::get_canonical_path(char* orig, char* out, int len) {
1073 assert(orig != NULL && out != NULL && len > 0, "bad arguments");
1074 if (CanonicalizeEntry != NULL) {
1075 JNIEnv* env = JavaThread::current()->jni_environment();
1076 if ((CanonicalizeEntry)(env, os::native_path(orig), out, len) < 0) {
1077 return false;
1078 }
1079 } else {
1080 // On JDK 1.2.2 the Canonicalize does not exist, so just do nothing
1081 strncpy(out, orig, len);
1082 out[len - 1] = '\0';
1083 }
1084 return true;
1085 }
1086
1087 #ifndef PRODUCT
1088
1089 void ClassLoader::verify() {
1090 _package_hash_table->verify();
1091 }
1092
1093
1094 // CompileTheWorld
1095 //
1096 // Iterates over all class path entries and forces compilation of all methods
1097 // in all classes found. Currently, only zip/jar archives are searched.
1098 //
1099 // The classes are loaded by the Java level bootstrap class loader, and the
1100 // initializer is called. If DelayCompilationDuringStartup is true (default),
1101 // the interpreter will run the initialization code. Note that forcing
1102 // initialization in this way could potentially lead to initialization order
1103 // problems, in which case we could just force the initialization bit to be set.
1104
1105
1106 // We need to iterate over the contents of a zip/jar file, so we replicate the
1107 // jzcell and jzfile definitions from zip_util.h but rename jzfile to real_jzfile,
1108 // since jzfile already has a void* definition.
1109 //
1110 // Note that this is only used in debug mode.
1111 //
1112 // HotSpot integration note:
1113 // Matches zip_util.h 1.14 99/06/01 from jdk1.3 beta H build
1114
1115
1116 // JDK 1.3 version
1117 typedef struct real_jzentry13 { /* Zip file entry */
1118 char *name; /* entry name */
1119 jint time; /* modification time */
1120 jint size; /* size of uncompressed data */
1121 jint csize; /* size of compressed data (zero if uncompressed) */
1122 jint crc; /* crc of uncompressed data */
1123 char *comment; /* optional zip file comment */
1124 jbyte *extra; /* optional extra data */
1125 jint pos; /* position of LOC header (if negative) or data */
1126 } real_jzentry13;
1127
1128 typedef struct real_jzfile13 { /* Zip file */
1129 char *name; /* zip file name */
1130 jint refs; /* number of active references */
1131 jint fd; /* open file descriptor */
1132 void *lock; /* read lock */
1133 char *comment; /* zip file comment */
1134 char *msg; /* zip error message */
1135 void *entries; /* array of hash cells */
1136 jint total; /* total number of entries */
1137 unsigned short *table; /* Hash chain heads: indexes into entries */
1138 jint tablelen; /* number of hash eads */
1139 real_jzfile13 *next; /* next zip file in search list */
1140 jzentry *cache; /* we cache the most recently freed jzentry */
1141 /* Information on metadata names in META-INF directory */
1142 char **metanames; /* array of meta names (may have null names) */
1143 jint metacount; /* number of slots in metanames array */
1144 /* If there are any per-entry comments, they are in the comments array */
1145 char **comments;
1146 } real_jzfile13;
1147
1148 // JDK 1.2 version
1149 typedef struct real_jzentry12 { /* Zip file entry */
1150 char *name; /* entry name */
1151 jint time; /* modification time */
1152 jint size; /* size of uncompressed data */
1153 jint csize; /* size of compressed data (zero if uncompressed) */
1154 jint crc; /* crc of uncompressed data */
1155 char *comment; /* optional zip file comment */
1156 jbyte *extra; /* optional extra data */
1157 jint pos; /* position of LOC header (if negative) or data */
1158 struct real_jzentry12 *next; /* next entry in hash table */
1159 } real_jzentry12;
1160
1161 typedef struct real_jzfile12 { /* Zip file */
1162 char *name; /* zip file name */
1163 jint refs; /* number of active references */
1164 jint fd; /* open file descriptor */
1165 void *lock; /* read lock */
1166 char *comment; /* zip file comment */
1167 char *msg; /* zip error message */
1168 real_jzentry12 *entries; /* array of zip entries */
1169 jint total; /* total number of entries */
1170 real_jzentry12 **table; /* hash table of entries */
1171 jint tablelen; /* number of buckets */
1172 jzfile *next; /* next zip file in search list */
1173 } real_jzfile12;
1174
1175
1176 void ClassPathDirEntry::compile_the_world(Handle loader, TRAPS) {
1177 // For now we only compile all methods in all classes in zip/jar files
1178 tty->print_cr("CompileTheWorld : Skipped classes in %s", _dir);
1179 tty->cr();
1180 }
1181
1182
1183 bool ClassPathDirEntry::is_rt_jar() {
1184 return false;
1185 }
1186
1187 void ClassPathZipEntry::compile_the_world(Handle loader, TRAPS) {
1188 if (JDK_Version::is_jdk12x_version()) {
1189 compile_the_world12(loader, THREAD);
1190 } else {
1191 compile_the_world13(loader, THREAD);
1192 }
1193 if (HAS_PENDING_EXCEPTION) {
1194 if (PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())) {
1195 CLEAR_PENDING_EXCEPTION;
1196 tty->print_cr("\nCompileTheWorld : Ran out of memory\n");
1197 tty->print_cr("Increase class metadata storage if a limit was set");
1198 } else {
1199 tty->print_cr("\nCompileTheWorld : Unexpected exception occurred\n");
1200 }
1201 }
1202 }
1203
1204 // Version that works for JDK 1.3.x
1205 void ClassPathZipEntry::compile_the_world13(Handle loader, TRAPS) {
1206 real_jzfile13* zip = (real_jzfile13*) _zip;
1207 tty->print_cr("CompileTheWorld : Compiling all classes in %s", zip->name);
1208 tty->cr();
1209 // Iterate over all entries in zip file
1210 for (int n = 0; ; n++) {
1211 real_jzentry13 * ze = (real_jzentry13 *)((*GetNextEntry)(_zip, n));
1212 if (ze == NULL) break;
1213 ClassLoader::compile_the_world_in(ze->name, loader, CHECK);
1214 }
1215 }
1216
1217
1218 // Version that works for JDK 1.2.x
1219 void ClassPathZipEntry::compile_the_world12(Handle loader, TRAPS) {
1220 real_jzfile12* zip = (real_jzfile12*) _zip;
1221 tty->print_cr("CompileTheWorld : Compiling all classes in %s", zip->name);
1222 tty->cr();
1223 // Iterate over all entries in zip file
1224 for (int n = 0; ; n++) {
1225 real_jzentry12 * ze = (real_jzentry12 *)((*GetNextEntry)(_zip, n));
1226 if (ze == NULL) break;
1227 ClassLoader::compile_the_world_in(ze->name, loader, CHECK);
1228 }
1229 }
1230
1231 bool ClassPathZipEntry::is_rt_jar() {
1232 if (JDK_Version::is_jdk12x_version()) {
1233 return is_rt_jar12();
1234 } else {
1235 return is_rt_jar13();
1236 }
1237 }
1238
1239 // JDK 1.3 version
1240 bool ClassPathZipEntry::is_rt_jar13() {
1241 real_jzfile13* zip = (real_jzfile13*) _zip;
1242 int len = (int)strlen(zip->name);
1243 // Check whether zip name ends in "rt.jar"
1244 // This will match other archives named rt.jar as well, but this is
1245 // only used for debugging.
1246 return (len >= 6) && (strcasecmp(zip->name + len - 6, "rt.jar") == 0);
1247 }
1248
1249 // JDK 1.2 version
1250 bool ClassPathZipEntry::is_rt_jar12() {
1251 real_jzfile12* zip = (real_jzfile12*) _zip;
1252 int len = (int)strlen(zip->name);
1253 // Check whether zip name ends in "rt.jar"
1254 // This will match other archives named rt.jar as well, but this is
1255 // only used for debugging.
1256 return (len >= 6) && (strcasecmp(zip->name + len - 6, "rt.jar") == 0);
1257 }
1258
1259 void LazyClassPathEntry::compile_the_world(Handle loader, TRAPS) {
1260 resolve_entry()->compile_the_world(loader, CHECK);
1261 }
1262
1263 bool LazyClassPathEntry::is_rt_jar() {
1264 return resolve_entry()->is_rt_jar();
1265 }
1266
1267 void ClassLoader::compile_the_world() {
1268 EXCEPTION_MARK;
1269 HandleMark hm(THREAD);
1270 ResourceMark rm(THREAD);
1271 // Make sure we don't run with background compilation
1272 BackgroundCompilation = false;
1273 // Find bootstrap loader
1274 Handle system_class_loader (THREAD, SystemDictionary::java_system_loader());
1275 // Iterate over all bootstrap class path entries
1276 ClassPathEntry* e = _first_entry;
1277 jlong start = os::javaTimeMillis();
1278 while (e != NULL) {
1279 // We stop at rt.jar, unless it is the first bootstrap path entry
1280 if (e->is_rt_jar() && e != _first_entry) break;
1281 e->compile_the_world(system_class_loader, CATCH);
1282 e = e->next();
1283 }
1284 jlong end = os::javaTimeMillis();
1285 tty->print_cr("CompileTheWorld : Done (%d classes, %d methods, %d ms)",
1286 _compile_the_world_class_counter, _compile_the_world_method_counter, (end - start));
1287 {
1288 // Print statistics as if before normal exit:
1289 extern void print_statistics();
1290 print_statistics();
1291 }
1292 vm_exit(0);
1293 }
1294
1295 int ClassLoader::_compile_the_world_class_counter = 0;
1296 int ClassLoader::_compile_the_world_method_counter = 0;
1297 static int _codecache_sweep_counter = 0;
1298
1299 // Filter out all exceptions except OOMs
1300 static void clear_pending_exception_if_not_oom(TRAPS) {
1301 if (HAS_PENDING_EXCEPTION &&
1302 !PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())) {
1303 CLEAR_PENDING_EXCEPTION;
1304 }
1305 // The CHECK at the caller will propagate the exception out
1306 }
1307
1308 void ClassLoader::compile_the_world_in(char* name, Handle loader, TRAPS) {
1309 int len = (int)strlen(name);
1310 if (len > 6 && strcmp(".class", name + len - 6) == 0) {
1311 // We have a .class file
1312 char buffer[2048];
1313 strncpy(buffer, name, len - 6);
1314 buffer[len-6] = 0;
1315 // If the file has a period after removing .class, it's not really a
1316 // valid class file. The class loader will check everything else.
1317 if (strchr(buffer, '.') == NULL) {
1318 _compile_the_world_class_counter++;
1319 if (_compile_the_world_class_counter > CompileTheWorldStopAt) return;
1320
1321 // Construct name without extension
1322 TempNewSymbol sym = SymbolTable::new_symbol(buffer, CHECK);
1323 // Use loader to load and initialize class
1324 Klass* ik = SystemDictionary::resolve_or_null(sym, loader, Handle(), THREAD);
1325 instanceKlassHandle k (THREAD, ik);
1326 if (k.not_null() && !HAS_PENDING_EXCEPTION) {
1327 k->initialize(THREAD);
1328 }
1329 bool exception_occurred = HAS_PENDING_EXCEPTION;
1330 clear_pending_exception_if_not_oom(CHECK);
1331 if (CompileTheWorldPreloadClasses && k.not_null()) {
1332 ConstantPool::preload_and_initialize_all_classes(k->constants(), THREAD);
1333 if (HAS_PENDING_EXCEPTION) {
1334 // If something went wrong in preloading we just ignore it
1335 clear_pending_exception_if_not_oom(CHECK);
1336 tty->print_cr("Preloading failed for (%d) %s", _compile_the_world_class_counter, buffer);
1337 }
1338 }
1339
1340 if (_compile_the_world_class_counter >= CompileTheWorldStartAt) {
1341 if (k.is_null() || exception_occurred) {
1342 // If something went wrong (e.g. ExceptionInInitializerError) we skip this class
1343 tty->print_cr("CompileTheWorld (%d) : Skipping %s", _compile_the_world_class_counter, buffer);
1344 } else {
1345 tty->print_cr("CompileTheWorld (%d) : %s", _compile_the_world_class_counter, buffer);
1346 // Preload all classes to get around uncommon traps
1347 // Iterate over all methods in class
1348 int comp_level = CompilationPolicy::policy()->initial_compile_level();
1349 for (int n = 0; n < k->methods()->length(); n++) {
1350 methodHandle m (THREAD, k->methods()->at(n));
1351 if (CompilationPolicy::can_be_compiled(m, comp_level)) {
1352
1353 if (++_codecache_sweep_counter == CompileTheWorldSafepointInterval) {
1354 // Give sweeper a chance to keep up with CTW
1355 VM_ForceSafepoint op;
1356 VMThread::execute(&op);
1357 _codecache_sweep_counter = 0;
1358 }
1359 // Force compilation
1360 CompileBroker::compile_method(m, InvocationEntryBci, comp_level,
1361 methodHandle(), 0, "CTW", THREAD);
1362 if (HAS_PENDING_EXCEPTION) {
1363 clear_pending_exception_if_not_oom(CHECK);
1364 tty->print_cr("CompileTheWorld (%d) : Skipping method: %s", _compile_the_world_class_counter, m->name()->as_C_string());
1365 } else {
1366 _compile_the_world_method_counter++;
1367 }
1368 if (TieredCompilation && TieredStopAtLevel >= CompLevel_full_optimization) {
1369 // Clobber the first compile and force second tier compilation
1370 nmethod* nm = m->code();
1371 if (nm != NULL) {
1372 // Throw out the code so that the code cache doesn't fill up
1373 nm->make_not_entrant();
1374 m->clear_code();
1375 }
1376 CompileBroker::compile_method(m, InvocationEntryBci, CompLevel_full_optimization,
1377 methodHandle(), 0, "CTW", THREAD);
1378 if (HAS_PENDING_EXCEPTION) {
1379 clear_pending_exception_if_not_oom(CHECK);
1380 tty->print_cr("CompileTheWorld (%d) : Skipping method: %s", _compile_the_world_class_counter, m->name()->as_C_string());
1381 } else {
1382 _compile_the_world_method_counter++;
1383 }
1384 }
1385 }
1386
1387 nmethod* nm = m->code();
1388 if (nm != NULL) {
1389 // Throw out the code so that the code cache doesn't fill up
1390 nm->make_not_entrant();
1391 m->clear_code();
1392 }
1393 }
1394 }
1395 }
1396 }
1397 }
1398 }
1399
1400 #endif //PRODUCT
1401
1402 // Please keep following two functions at end of this file. With them placed at top or in middle of the file,
1403 // they could get inlined by agressive compiler, an unknown trick, see bug 6966589.
1404 void PerfClassTraceTime::initialize() {
1405 if (!UsePerfData) return;
1406
1407 if (_eventp != NULL) {
1408 // increment the event counter
1409 _eventp->inc();
1410 }
1411
1412 // stop the current active thread-local timer to measure inclusive time
1413 _prev_active_event = -1;
1414 for (int i=0; i < EVENT_TYPE_COUNT; i++) {
1415 if (_timers[i].is_active()) {
1416 assert(_prev_active_event == -1, "should have only one active timer");
1417 _prev_active_event = i;
1418 _timers[i].stop();
1419 }
1420 }
1421
1422 if (_recursion_counters == NULL || (_recursion_counters[_event_type])++ == 0) {
1423 // start the inclusive timer if not recursively called
1424 _t.start();
1425 }
1426
1427 // start thread-local timer of the given event type
1428 if (!_timers[_event_type].is_active()) {
1429 _timers[_event_type].start();
1430 }
1431 }
1432
1433 PerfClassTraceTime::~PerfClassTraceTime() {
1434 if (!UsePerfData) return;
1435
1436 // stop the thread-local timer as the event completes
1437 // and resume the thread-local timer of the event next on the stack
1438 _timers[_event_type].stop();
1439 jlong selftime = _timers[_event_type].ticks();
1440
1441 if (_prev_active_event >= 0) {
1442 _timers[_prev_active_event].start();
1443 }
1444
1445 if (_recursion_counters != NULL && --(_recursion_counters[_event_type]) > 0) return;
1446
1447 // increment the counters only on the leaf call
1448 _t.stop();
1449 _timep->inc(_t.ticks());
1450 if (_selftimep != NULL) {
1451 _selftimep->inc(selftime);
1452 }
1453 // add all class loading related event selftime to the accumulated time counter
1454 ClassLoader::perf_accumulated_time()->inc(selftime);
1455
1456 // reset the timer
1457 _timers[_event_type].reset();
1458 }