1 /*
2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "incls/_precompiled.incl"
26 #include "incls/_classLoader.cpp.incl"
27
28
29 // Entry points in zip.dll for loading zip/jar file entries
30
31 typedef void * * (JNICALL *ZipOpen_t)(const char *name, char **pmsg);
32 typedef void (JNICALL *ZipClose_t)(jzfile *zip);
33 typedef jzentry* (JNICALL *FindEntry_t)(jzfile *zip, const char *name, jint *sizeP, jint *nameLen);
34 typedef jboolean (JNICALL *ReadEntry_t)(jzfile *zip, jzentry *entry, unsigned char *buf, char *namebuf);
35 typedef jboolean (JNICALL *ReadMappedEntry_t)(jzfile *zip, jzentry *entry, unsigned char **buf, char *namebuf);
36 typedef jzentry* (JNICALL *GetNextEntry_t)(jzfile *zip, jint n);
37
38 static ZipOpen_t ZipOpen = NULL;
39 static ZipClose_t ZipClose = NULL;
40 static FindEntry_t FindEntry = NULL;
41 static ReadEntry_t ReadEntry = NULL;
42 static ReadMappedEntry_t ReadMappedEntry = NULL;
43 static GetNextEntry_t GetNextEntry = NULL;
44 static canonicalize_fn_t CanonicalizeEntry = NULL;
45
46 // Globals
47
48 PerfCounter* ClassLoader::_perf_accumulated_time = NULL;
49 PerfCounter* ClassLoader::_perf_classes_inited = NULL;
50 PerfCounter* ClassLoader::_perf_class_init_time = NULL;
51 PerfCounter* ClassLoader::_perf_class_init_selftime = NULL;
52 PerfCounter* ClassLoader::_perf_classes_verified = NULL;
53 PerfCounter* ClassLoader::_perf_class_verify_time = NULL;
54 PerfCounter* ClassLoader::_perf_class_verify_selftime = NULL;
55 PerfCounter* ClassLoader::_perf_classes_linked = NULL;
56 PerfCounter* ClassLoader::_perf_class_link_time = NULL;
57 PerfCounter* ClassLoader::_perf_class_link_selftime = NULL;
58 PerfCounter* ClassLoader::_perf_class_parse_time = NULL;
59 PerfCounter* ClassLoader::_perf_class_parse_selftime = NULL;
60 PerfCounter* ClassLoader::_perf_sys_class_lookup_time = NULL;
61 PerfCounter* ClassLoader::_perf_shared_classload_time = NULL;
62 PerfCounter* ClassLoader::_perf_sys_classload_time = NULL;
63 PerfCounter* ClassLoader::_perf_app_classload_time = NULL;
64 PerfCounter* ClassLoader::_perf_app_classload_selftime = NULL;
65 PerfCounter* ClassLoader::_perf_app_classload_count = NULL;
66 PerfCounter* ClassLoader::_perf_define_appclasses = NULL;
67 PerfCounter* ClassLoader::_perf_define_appclass_time = NULL;
68 PerfCounter* ClassLoader::_perf_define_appclass_selftime = NULL;
69 PerfCounter* ClassLoader::_perf_app_classfile_bytes_read = NULL;
70 PerfCounter* ClassLoader::_perf_sys_classfile_bytes_read = NULL;
71 PerfCounter* ClassLoader::_sync_systemLoaderLockContentionRate = NULL;
72 PerfCounter* ClassLoader::_sync_nonSystemLoaderLockContentionRate = NULL;
73 PerfCounter* ClassLoader::_sync_JVMFindLoadedClassLockFreeCounter = NULL;
74 PerfCounter* ClassLoader::_sync_JVMDefineClassLockFreeCounter = NULL;
75 PerfCounter* ClassLoader::_sync_JNIDefineClassLockFreeCounter = NULL;
76 PerfCounter* ClassLoader::_unsafe_defineClassCallCounter = NULL;
77 PerfCounter* ClassLoader::_isUnsyncloadClass = NULL;
78 PerfCounter* ClassLoader::_load_instance_class_failCounter = NULL;
79
80 ClassPathEntry* ClassLoader::_first_entry = NULL;
81 ClassPathEntry* ClassLoader::_last_entry = NULL;
82 PackageHashtable* ClassLoader::_package_hash_table = NULL;
83
84 // helper routines
85 bool string_starts_with(const char* str, const char* str_to_find) {
86 size_t str_len = strlen(str);
87 size_t str_to_find_len = strlen(str_to_find);
88 if (str_to_find_len > str_len) {
89 return false;
90 }
91 return (strncmp(str, str_to_find, str_to_find_len) == 0);
92 }
93
94 bool string_ends_with(const char* str, const char* str_to_find) {
95 size_t str_len = strlen(str);
96 size_t str_to_find_len = strlen(str_to_find);
97 if (str_to_find_len > str_len) {
98 return false;
99 }
100 return (strncmp(str + (str_len - str_to_find_len), str_to_find, str_to_find_len) == 0);
101 }
102
103
104 MetaIndex::MetaIndex(char** meta_package_names, int num_meta_package_names) {
105 if (num_meta_package_names == 0) {
106 _meta_package_names = NULL;
107 _num_meta_package_names = 0;
108 } else {
109 _meta_package_names = NEW_C_HEAP_ARRAY(char*, num_meta_package_names);
110 _num_meta_package_names = num_meta_package_names;
111 memcpy(_meta_package_names, meta_package_names, num_meta_package_names * sizeof(char*));
112 }
113 }
114
115
116 MetaIndex::~MetaIndex() {
117 FREE_C_HEAP_ARRAY(char*, _meta_package_names);
118 }
119
120
121 bool MetaIndex::may_contain(const char* class_name) {
122 if ( _num_meta_package_names == 0) {
123 return false;
124 }
125 size_t class_name_len = strlen(class_name);
126 for (int i = 0; i < _num_meta_package_names; i++) {
127 char* pkg = _meta_package_names[i];
128 size_t pkg_len = strlen(pkg);
129 size_t min_len = MIN2(class_name_len, pkg_len);
130 if (!strncmp(class_name, pkg, min_len)) {
131 return true;
132 }
133 }
134 return false;
135 }
136
137
138 ClassPathEntry::ClassPathEntry() {
139 set_next(NULL);
140 }
141
142
143 bool ClassPathEntry::is_lazy() {
144 return false;
145 }
146
147 ClassPathDirEntry::ClassPathDirEntry(char* dir) : ClassPathEntry() {
148 _dir = NEW_C_HEAP_ARRAY(char, strlen(dir)+1);
149 strcpy(_dir, dir);
150 }
151
152
153 ClassFileStream* ClassPathDirEntry::open_stream(const char* name) {
154 // construct full path name
155 char path[JVM_MAXPATHLEN];
156 if (jio_snprintf(path, sizeof(path), "%s%s%s", _dir, os::file_separator(), name) == -1) {
157 return NULL;
158 }
159 // check if file exists
160 struct stat st;
161 if (os::stat(path, &st) == 0) {
162 // found file, open it
163 int file_handle = hpi::open(path, 0, 0);
164 if (file_handle != -1) {
165 // read contents into resource array
166 u1* buffer = NEW_RESOURCE_ARRAY(u1, st.st_size);
167 size_t num_read = os::read(file_handle, (char*) buffer, st.st_size);
168 // close file
169 hpi::close(file_handle);
170 // construct ClassFileStream
171 if (num_read == (size_t)st.st_size) {
172 if (UsePerfData) {
173 ClassLoader::perf_sys_classfile_bytes_read()->inc(num_read);
174 }
175 return new ClassFileStream(buffer, st.st_size, _dir); // Resource allocated
176 }
177 }
178 }
179 return NULL;
180 }
181
182
183 ClassPathZipEntry::ClassPathZipEntry(jzfile* zip, const char* zip_name) : ClassPathEntry() {
184 _zip = zip;
185 _zip_name = NEW_C_HEAP_ARRAY(char, strlen(zip_name)+1);
186 strcpy(_zip_name, zip_name);
187 }
188
189 ClassPathZipEntry::~ClassPathZipEntry() {
190 if (ZipClose != NULL) {
191 (*ZipClose)(_zip);
192 }
193 FREE_C_HEAP_ARRAY(char, _zip_name);
194 }
195
196 ClassFileStream* ClassPathZipEntry::open_stream(const char* name) {
197 // enable call to C land
198 JavaThread* thread = JavaThread::current();
199 ThreadToNativeFromVM ttn(thread);
200 // check whether zip archive contains name
201 jint filesize, name_len;
202 jzentry* entry = (*FindEntry)(_zip, name, &filesize, &name_len);
203 if (entry == NULL) return NULL;
204 u1* buffer;
205 char name_buf[128];
206 char* filename;
207 if (name_len < 128) {
208 filename = name_buf;
209 } else {
210 filename = NEW_RESOURCE_ARRAY(char, name_len + 1);
211 }
212
213 // file found, get pointer to class in mmaped jar file.
214 if (ReadMappedEntry == NULL ||
215 !(*ReadMappedEntry)(_zip, entry, &buffer, filename)) {
216 // mmaped access not available, perhaps due to compression,
217 // read contents into resource array
218 buffer = NEW_RESOURCE_ARRAY(u1, filesize);
219 if (!(*ReadEntry)(_zip, entry, buffer, filename)) return NULL;
220 }
221 if (UsePerfData) {
222 ClassLoader::perf_sys_classfile_bytes_read()->inc(filesize);
223 }
224 // return result
225 return new ClassFileStream(buffer, filesize, _zip_name); // Resource allocated
226 }
227
228 // invoke function for each entry in the zip file
229 void ClassPathZipEntry::contents_do(void f(const char* name, void* context), void* context) {
230 JavaThread* thread = JavaThread::current();
231 HandleMark handle_mark(thread);
232 ThreadToNativeFromVM ttn(thread);
233 for (int n = 0; ; n++) {
234 jzentry * ze = ((*GetNextEntry)(_zip, n));
235 if (ze == NULL) break;
236 (*f)(ze->name, context);
237 }
238 }
239
240 LazyClassPathEntry::LazyClassPathEntry(char* path, struct stat st) : ClassPathEntry() {
241 _path = strdup(path);
242 _st = st;
243 _meta_index = NULL;
244 _resolved_entry = NULL;
245 }
246
247 bool LazyClassPathEntry::is_jar_file() {
248 return ((_st.st_mode & S_IFREG) == S_IFREG);
249 }
250
251 ClassPathEntry* LazyClassPathEntry::resolve_entry() {
252 if (_resolved_entry != NULL) {
253 return (ClassPathEntry*) _resolved_entry;
254 }
255 ClassPathEntry* new_entry = NULL;
256 ClassLoader::create_class_path_entry(_path, _st, &new_entry, false);
257 assert(new_entry != NULL, "earlier code should have caught this");
258 {
259 ThreadCritical tc;
260 if (_resolved_entry == NULL) {
261 _resolved_entry = new_entry;
262 return new_entry;
263 }
264 }
265 assert(_resolved_entry != NULL, "bug in MT-safe resolution logic");
266 delete new_entry;
267 return (ClassPathEntry*) _resolved_entry;
268 }
269
270 ClassFileStream* LazyClassPathEntry::open_stream(const char* name) {
271 if (_meta_index != NULL &&
272 !_meta_index->may_contain(name)) {
273 return NULL;
274 }
275 return resolve_entry()->open_stream(name);
276 }
277
278 bool LazyClassPathEntry::is_lazy() {
279 return true;
280 }
281
282 static void print_meta_index(LazyClassPathEntry* entry,
283 GrowableArray<char*>& meta_packages) {
284 tty->print("[Meta index for %s=", entry->name());
285 for (int i = 0; i < meta_packages.length(); i++) {
286 if (i > 0) tty->print(" ");
287 tty->print(meta_packages.at(i));
288 }
289 tty->print_cr("]");
290 }
291
292
293 void ClassLoader::setup_meta_index() {
294 // Set up meta index which allows us to open boot jars lazily if
295 // class data sharing is enabled
296 const char* known_version = "% VERSION 2";
297 char* meta_index_path = Arguments::get_meta_index_path();
298 char* meta_index_dir = Arguments::get_meta_index_dir();
299 FILE* file = fopen(meta_index_path, "r");
300 int line_no = 0;
301 if (file != NULL) {
302 ResourceMark rm;
303 LazyClassPathEntry* cur_entry = NULL;
304 GrowableArray<char*> boot_class_path_packages(10);
305 char package_name[256];
306 bool skipCurrentJar = false;
307 while (fgets(package_name, sizeof(package_name), file) != NULL) {
308 ++line_no;
309 // Remove trailing newline
310 package_name[strlen(package_name) - 1] = '\0';
311 switch(package_name[0]) {
312 case '%':
313 {
314 if ((line_no == 1) && (strcmp(package_name, known_version) != 0)) {
315 if (TraceClassLoading && Verbose) {
316 tty->print("[Unsupported meta index version]");
317 }
318 fclose(file);
319 return;
320 }
321 }
322
323 // These directives indicate jar files which contain only
324 // classes, only non-classfile resources, or a combination of
325 // the two. See src/share/classes/sun/misc/MetaIndex.java and
326 // make/tools/MetaIndex/BuildMetaIndex.java in the J2SE
327 // workspace.
328 case '#':
329 case '!':
330 case '@':
331 {
332 // Hand off current packages to current lazy entry (if any)
333 if ((cur_entry != NULL) &&
334 (boot_class_path_packages.length() > 0)) {
335 if (TraceClassLoading && Verbose) {
336 print_meta_index(cur_entry, boot_class_path_packages);
337 }
338 MetaIndex* index = new MetaIndex(boot_class_path_packages.adr_at(0),
339 boot_class_path_packages.length());
340 cur_entry->set_meta_index(index);
341 }
342 cur_entry = NULL;
343 boot_class_path_packages.clear();
344
345 // Find lazy entry corresponding to this jar file
346 for (ClassPathEntry* entry = _first_entry; entry != NULL; entry = entry->next()) {
347 if (entry->is_lazy() &&
348 string_starts_with(entry->name(), meta_index_dir) &&
349 string_ends_with(entry->name(), &package_name[2])) {
350 cur_entry = (LazyClassPathEntry*) entry;
351 break;
352 }
353 }
354
355 // If the first character is '@', it indicates the following jar
356 // file is a resource only jar file in which case, we should skip
357 // reading the subsequent entries since the resource loading is
358 // totally handled by J2SE side.
359 if (package_name[0] == '@') {
360 if (cur_entry != NULL) {
361 cur_entry->set_meta_index(new MetaIndex(NULL, 0));
362 }
363 cur_entry = NULL;
364 skipCurrentJar = true;
365 } else {
366 skipCurrentJar = false;
367 }
368
369 break;
370 }
371
372 default:
373 {
374 if (!skipCurrentJar && cur_entry != NULL) {
375 char* new_name = strdup(package_name);
376 boot_class_path_packages.append(new_name);
377 }
378 }
379 }
380 }
381 // Hand off current packages to current lazy entry (if any)
382 if ((cur_entry != NULL) &&
383 (boot_class_path_packages.length() > 0)) {
384 if (TraceClassLoading && Verbose) {
385 print_meta_index(cur_entry, boot_class_path_packages);
386 }
387 MetaIndex* index = new MetaIndex(boot_class_path_packages.adr_at(0),
388 boot_class_path_packages.length());
389 cur_entry->set_meta_index(index);
390 }
391 fclose(file);
392 }
393 }
394
395 void ClassLoader::setup_bootstrap_search_path() {
396 assert(_first_entry == NULL, "should not setup bootstrap class search path twice");
397 char* sys_class_path = os::strdup(Arguments::get_sysclasspath());
398 if (TraceClassLoading && Verbose) {
399 tty->print_cr("[Bootstrap loader class path=%s]", sys_class_path);
400 }
401
402 int len = (int)strlen(sys_class_path);
403 int end = 0;
404
405 // Iterate over class path entries
406 for (int start = 0; start < len; start = end) {
407 while (sys_class_path[end] && sys_class_path[end] != os::path_separator()[0]) {
408 end++;
409 }
410 char* path = NEW_C_HEAP_ARRAY(char, end-start+1);
411 strncpy(path, &sys_class_path[start], end-start);
412 path[end-start] = '\0';
413 update_class_path_entry_list(path, false);
414 FREE_C_HEAP_ARRAY(char, path);
415 while (sys_class_path[end] == os::path_separator()[0]) {
416 end++;
417 }
418 }
419 }
420
421 void ClassLoader::create_class_path_entry(char *path, struct stat st, ClassPathEntry **new_entry, bool lazy) {
422 JavaThread* thread = JavaThread::current();
423 if (lazy) {
424 *new_entry = new LazyClassPathEntry(path, st);
425 return;
426 }
427 if ((st.st_mode & S_IFREG) == S_IFREG) {
428 // Regular file, should be a zip file
429 // Canonicalized filename
430 char canonical_path[JVM_MAXPATHLEN];
431 if (!get_canonical_path(path, canonical_path, JVM_MAXPATHLEN)) {
432 // This matches the classic VM
433 EXCEPTION_MARK;
434 THROW_MSG(vmSymbols::java_io_IOException(), "Bad pathname");
435 }
436 char* error_msg = NULL;
437 jzfile* zip;
438 {
439 // enable call to C land
440 ThreadToNativeFromVM ttn(thread);
441 HandleMark hm(thread);
442 zip = (*ZipOpen)(canonical_path, &error_msg);
443 }
444 if (zip != NULL && error_msg == NULL) {
445 *new_entry = new ClassPathZipEntry(zip, path);
446 if (TraceClassLoading) {
447 tty->print_cr("[Opened %s]", path);
448 }
449 } else {
450 ResourceMark rm(thread);
451 char *msg;
452 if (error_msg == NULL) {
453 msg = NEW_RESOURCE_ARRAY(char, strlen(path) + 128); ;
454 jio_snprintf(msg, strlen(path) + 127, "error in opening JAR file %s", path);
455 } else {
456 int len = (int)(strlen(path) + strlen(error_msg) + 128);
457 msg = NEW_RESOURCE_ARRAY(char, len); ;
458 jio_snprintf(msg, len - 1, "error in opening JAR file <%s> %s", error_msg, path);
459 }
460 EXCEPTION_MARK;
461 THROW_MSG(vmSymbols::java_lang_ClassNotFoundException(), msg);
462 }
463 } else {
464 // Directory
465 *new_entry = new ClassPathDirEntry(path);
466 if (TraceClassLoading) {
467 tty->print_cr("[Path %s]", path);
468 }
469 }
470 }
471
472
473 // Create a class path zip entry for a given path (return NULL if not found
474 // or zip/JAR file cannot be opened)
475 ClassPathZipEntry* ClassLoader::create_class_path_zip_entry(const char *path) {
476 // check for a regular file
477 struct stat st;
478 if (os::stat(path, &st) == 0) {
479 if ((st.st_mode & S_IFREG) == S_IFREG) {
480 char orig_path[JVM_MAXPATHLEN];
481 char canonical_path[JVM_MAXPATHLEN];
482
483 strcpy(orig_path, path);
484 if (get_canonical_path(orig_path, canonical_path, JVM_MAXPATHLEN)) {
485 char* error_msg = NULL;
486 jzfile* zip;
487 {
488 // enable call to C land
489 JavaThread* thread = JavaThread::current();
490 ThreadToNativeFromVM ttn(thread);
491 HandleMark hm(thread);
492 zip = (*ZipOpen)(canonical_path, &error_msg);
493 }
494 if (zip != NULL && error_msg == NULL) {
495 // create using canonical path
496 return new ClassPathZipEntry(zip, canonical_path);
497 }
498 }
499 }
500 }
501 return NULL;
502 }
503
504 // returns true if entry already on class path
505 bool ClassLoader::contains_entry(ClassPathEntry *entry) {
506 ClassPathEntry* e = _first_entry;
507 while (e != NULL) {
508 // assume zip entries have been canonicalized
509 if (strcmp(entry->name(), e->name()) == 0) {
510 return true;
511 }
512 e = e->next();
513 }
514 return false;
515 }
516
517 void ClassLoader::add_to_list(ClassPathEntry *new_entry) {
518 if (new_entry != NULL) {
519 if (_last_entry == NULL) {
520 _first_entry = _last_entry = new_entry;
521 } else {
522 _last_entry->set_next(new_entry);
523 _last_entry = new_entry;
524 }
525 }
526 }
527
528 void ClassLoader::update_class_path_entry_list(const char *path,
529 bool check_for_duplicates) {
530 struct stat st;
531 if (os::stat((char *)path, &st) == 0) {
532 // File or directory found
533 ClassPathEntry* new_entry = NULL;
534 create_class_path_entry((char *)path, st, &new_entry, LazyBootClassLoader);
535 // The kernel VM adds dynamically to the end of the classloader path and
536 // doesn't reorder the bootclasspath which would break java.lang.Package
537 // (see PackageInfo).
538 // Add new entry to linked list
539 if (!check_for_duplicates || !contains_entry(new_entry)) {
540 add_to_list(new_entry);
541 }
542 }
543 }
544
545 void ClassLoader::print_bootclasspath() {
546 ClassPathEntry* e = _first_entry;
547 tty->print("[bootclasspath= ");
548 while (e != NULL) {
549 tty->print("%s ;", e->name());
550 e = e->next();
551 }
552 tty->print_cr("]");
553 }
554
555 void ClassLoader::load_zip_library() {
556 assert(ZipOpen == NULL, "should not load zip library twice");
557 // First make sure native library is loaded
558 os::native_java_library();
559 // Load zip library
560 char path[JVM_MAXPATHLEN];
561 char ebuf[1024];
562 hpi::dll_build_name(path, sizeof(path), Arguments::get_dll_dir(), "zip");
563 void* handle = hpi::dll_load(path, ebuf, sizeof ebuf);
564 if (handle == NULL) {
565 vm_exit_during_initialization("Unable to load ZIP library", path);
566 }
567 // Lookup zip entry points
568 ZipOpen = CAST_TO_FN_PTR(ZipOpen_t, hpi::dll_lookup(handle, "ZIP_Open"));
569 ZipClose = CAST_TO_FN_PTR(ZipClose_t, hpi::dll_lookup(handle, "ZIP_Close"));
570 FindEntry = CAST_TO_FN_PTR(FindEntry_t, hpi::dll_lookup(handle, "ZIP_FindEntry"));
571 ReadEntry = CAST_TO_FN_PTR(ReadEntry_t, hpi::dll_lookup(handle, "ZIP_ReadEntry"));
572 ReadMappedEntry = CAST_TO_FN_PTR(ReadMappedEntry_t, hpi::dll_lookup(handle, "ZIP_ReadMappedEntry"));
573 GetNextEntry = CAST_TO_FN_PTR(GetNextEntry_t, hpi::dll_lookup(handle, "ZIP_GetNextEntry"));
574
575 // ZIP_Close is not exported on Windows in JDK5.0 so don't abort if ZIP_Close is NULL
576 if (ZipOpen == NULL || FindEntry == NULL || ReadEntry == NULL || GetNextEntry == NULL) {
577 vm_exit_during_initialization("Corrupted ZIP library", path);
578 }
579
580 // Lookup canonicalize entry in libjava.dll
581 void *javalib_handle = os::native_java_library();
582 CanonicalizeEntry = CAST_TO_FN_PTR(canonicalize_fn_t, hpi::dll_lookup(javalib_handle, "Canonicalize"));
583 // This lookup only works on 1.3. Do not check for non-null here
584 }
585
586 // PackageInfo data exists in order to support the java.lang.Package
587 // class. A Package object provides information about a java package
588 // (version, vendor, etc.) which originates in the manifest of the jar
589 // file supplying the package. For application classes, the ClassLoader
590 // object takes care of this.
591
592 // For system (boot) classes, the Java code in the Package class needs
593 // to be able to identify which source jar file contained the boot
594 // class, so that it can extract the manifest from it. This table
595 // identifies java packages with jar files in the boot classpath.
596
597 // Because the boot classpath cannot change, the classpath index is
598 // sufficient to identify the source jar file or directory. (Since
599 // directories have no manifests, the directory name is not required,
600 // but is available.)
601
602 // When using sharing -- the pathnames of entries in the boot classpath
603 // may not be the same at runtime as they were when the archive was
604 // created (NFS, Samba, etc.). The actual files and directories named
605 // in the classpath must be the same files, in the same order, even
606 // though the exact name is not the same.
607
608 class PackageInfo: public BasicHashtableEntry {
609 public:
610 const char* _pkgname; // Package name
611 int _classpath_index; // Index of directory or JAR file loaded from
612
613 PackageInfo* next() {
614 return (PackageInfo*)BasicHashtableEntry::next();
615 }
616
617 const char* pkgname() { return _pkgname; }
618 void set_pkgname(char* pkgname) { _pkgname = pkgname; }
619
620 const char* filename() {
621 return ClassLoader::classpath_entry(_classpath_index)->name();
622 }
623
624 void set_index(int index) {
625 _classpath_index = index;
626 }
627 };
628
629
630 class PackageHashtable : public BasicHashtable {
631 private:
632 inline unsigned int compute_hash(const char *s, int n) {
633 unsigned int val = 0;
634 while (--n >= 0) {
635 val = *s++ + 31 * val;
636 }
637 return val;
638 }
639
640 PackageInfo* bucket(int index) {
641 return (PackageInfo*)BasicHashtable::bucket(index);
642 }
643
644 PackageInfo* get_entry(int index, unsigned int hash,
645 const char* pkgname, size_t n) {
646 for (PackageInfo* pp = bucket(index); pp != NULL; pp = pp->next()) {
647 if (pp->hash() == hash &&
648 strncmp(pkgname, pp->pkgname(), n) == 0 &&
649 pp->pkgname()[n] == '\0') {
650 return pp;
651 }
652 }
653 return NULL;
654 }
655
656 public:
657 PackageHashtable(int table_size)
658 : BasicHashtable(table_size, sizeof(PackageInfo)) {}
659
660 PackageHashtable(int table_size, HashtableBucket* t, int number_of_entries)
661 : BasicHashtable(table_size, sizeof(PackageInfo), t, number_of_entries) {}
662
663 PackageInfo* get_entry(const char* pkgname, int n) {
664 unsigned int hash = compute_hash(pkgname, n);
665 return get_entry(hash_to_index(hash), hash, pkgname, n);
666 }
667
668 PackageInfo* new_entry(char* pkgname, int n) {
669 unsigned int hash = compute_hash(pkgname, n);
670 PackageInfo* pp;
671 pp = (PackageInfo*)BasicHashtable::new_entry(hash);
672 pp->set_pkgname(pkgname);
673 return pp;
674 }
675
676 void add_entry(PackageInfo* pp) {
677 int index = hash_to_index(pp->hash());
678 BasicHashtable::add_entry(index, pp);
679 }
680
681 void copy_pkgnames(const char** packages) {
682 int n = 0;
683 for (int i = 0; i < table_size(); ++i) {
684 for (PackageInfo* pp = bucket(i); pp != NULL; pp = pp->next()) {
685 packages[n++] = pp->pkgname();
686 }
687 }
688 assert(n == number_of_entries(), "just checking");
689 }
690
691 void copy_table(char** top, char* end, PackageHashtable* table);
692 };
693
694
695 void PackageHashtable::copy_table(char** top, char* end,
696 PackageHashtable* table) {
697 // Copy (relocate) the table to the shared space.
698 BasicHashtable::copy_table(top, end);
699
700 // Calculate the space needed for the package name strings.
701 int i;
702 int n = 0;
703 for (i = 0; i < table_size(); ++i) {
704 for (PackageInfo* pp = table->bucket(i);
705 pp != NULL;
706 pp = pp->next()) {
707 n += (int)(strlen(pp->pkgname()) + 1);
708 }
709 }
710 if (*top + n + sizeof(intptr_t) >= end) {
711 warning("\nThe shared miscellaneous data space is not large "
712 "enough to \npreload requested classes. Use "
713 "-XX:SharedMiscDataSize= to increase \nthe initial "
714 "size of the miscellaneous data space.\n");
715 exit(2);
716 }
717
718 // Copy the table data (the strings) to the shared space.
719 n = align_size_up(n, sizeof(HeapWord));
720 *(intptr_t*)(*top) = n;
721 *top += sizeof(intptr_t);
722
723 for (i = 0; i < table_size(); ++i) {
724 for (PackageInfo* pp = table->bucket(i);
725 pp != NULL;
726 pp = pp->next()) {
727 int n1 = (int)(strlen(pp->pkgname()) + 1);
728 pp->set_pkgname((char*)memcpy(*top, pp->pkgname(), n1));
729 *top += n1;
730 }
731 }
732 *top = (char*)align_size_up((intptr_t)*top, sizeof(HeapWord));
733 }
734
735
736 void ClassLoader::copy_package_info_buckets(char** top, char* end) {
737 _package_hash_table->copy_buckets(top, end);
738 }
739
740 void ClassLoader::copy_package_info_table(char** top, char* end) {
741 _package_hash_table->copy_table(top, end, _package_hash_table);
742 }
743
744
745 PackageInfo* ClassLoader::lookup_package(const char *pkgname) {
746 const char *cp = strrchr(pkgname, '/');
747 if (cp != NULL) {
748 // Package prefix found
749 int n = cp - pkgname + 1;
750 return _package_hash_table->get_entry(pkgname, n);
751 }
752 return NULL;
753 }
754
755
756 bool ClassLoader::add_package(const char *pkgname, int classpath_index, TRAPS) {
757 assert(pkgname != NULL, "just checking");
758 // Bootstrap loader no longer holds system loader lock obj serializing
759 // load_instance_class and thereby add_package
760 {
761 MutexLocker ml(PackageTable_lock, THREAD);
762 // First check for previously loaded entry
763 PackageInfo* pp = lookup_package(pkgname);
764 if (pp != NULL) {
765 // Existing entry found, check source of package
766 pp->set_index(classpath_index);
767 return true;
768 }
769
770 const char *cp = strrchr(pkgname, '/');
771 if (cp != NULL) {
772 // Package prefix found
773 int n = cp - pkgname + 1;
774
775 char* new_pkgname = NEW_C_HEAP_ARRAY(char, n + 1);
776 if (new_pkgname == NULL) {
777 return false;
778 }
779
780 memcpy(new_pkgname, pkgname, n);
781 new_pkgname[n] = '\0';
782 pp = _package_hash_table->new_entry(new_pkgname, n);
783 pp->set_index(classpath_index);
784
785 // Insert into hash table
786 _package_hash_table->add_entry(pp);
787 }
788 return true;
789 }
790 }
791
792
793 oop ClassLoader::get_system_package(const char* name, TRAPS) {
794 PackageInfo* pp;
795 {
796 MutexLocker ml(PackageTable_lock, THREAD);
797 pp = lookup_package(name);
798 }
799 if (pp == NULL) {
800 return NULL;
801 } else {
802 Handle p = java_lang_String::create_from_str(pp->filename(), THREAD);
803 return p();
804 }
805 }
806
807
808 objArrayOop ClassLoader::get_system_packages(TRAPS) {
809 ResourceMark rm(THREAD);
810 int nof_entries;
811 const char** packages;
812 {
813 MutexLocker ml(PackageTable_lock, THREAD);
814 // Allocate resource char* array containing package names
815 nof_entries = _package_hash_table->number_of_entries();
816 if ((packages = NEW_RESOURCE_ARRAY(const char*, nof_entries)) == NULL) {
817 return NULL;
818 }
819 _package_hash_table->copy_pkgnames(packages);
820 }
821 // Allocate objArray and fill with java.lang.String
822 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
823 nof_entries, CHECK_0);
824 objArrayHandle result(THREAD, r);
825 for (int i = 0; i < nof_entries; i++) {
826 Handle str = java_lang_String::create_from_str(packages[i], CHECK_0);
827 result->obj_at_put(i, str());
828 }
829
830 return result();
831 }
832
833
834 instanceKlassHandle ClassLoader::load_classfile(symbolHandle h_name, TRAPS) {
835 ResourceMark rm(THREAD);
836 EventMark m("loading class " INTPTR_FORMAT, (address)h_name());
837 ThreadProfilerMark tpm(ThreadProfilerMark::classLoaderRegion);
838
839 stringStream st;
840 // st.print() uses too much stack space while handling a StackOverflowError
841 // st.print("%s.class", h_name->as_utf8());
842 st.print_raw(h_name->as_utf8());
843 st.print_raw(".class");
844 char* name = st.as_string();
845
846 // Lookup stream for parsing .class file
847 ClassFileStream* stream = NULL;
848 int classpath_index = 0;
849 {
850 PerfClassTraceTime vmtimer(perf_sys_class_lookup_time(),
851 ((JavaThread*) THREAD)->get_thread_stat()->perf_timers_addr(),
852 PerfClassTraceTime::CLASS_LOAD);
853 ClassPathEntry* e = _first_entry;
854 while (e != NULL) {
855 stream = e->open_stream(name);
856 if (stream != NULL) {
857 break;
858 }
859 e = e->next();
860 ++classpath_index;
861 }
862 }
863
864 instanceKlassHandle h(THREAD, klassOop(NULL));
865 if (stream != NULL) {
866
867 // class file found, parse it
868 ClassFileParser parser(stream);
869 Handle class_loader;
870 Handle protection_domain;
871 symbolHandle parsed_name;
872 instanceKlassHandle result = parser.parseClassFile(h_name,
873 class_loader,
874 protection_domain,
875 parsed_name,
876 false,
877 CHECK_(h));
878
879 // add to package table
880 if (add_package(name, classpath_index, THREAD)) {
881 h = result;
882 }
883 }
884
885 return h;
886 }
887
888
889 void ClassLoader::create_package_info_table(HashtableBucket *t, int length,
890 int number_of_entries) {
891 assert(_package_hash_table == NULL, "One package info table allowed.");
892 assert(length == package_hash_table_size * sizeof(HashtableBucket),
893 "bad shared package info size.");
894 _package_hash_table = new PackageHashtable(package_hash_table_size, t,
895 number_of_entries);
896 }
897
898
899 void ClassLoader::create_package_info_table() {
900 assert(_package_hash_table == NULL, "shouldn't have one yet");
901 _package_hash_table = new PackageHashtable(package_hash_table_size);
902 }
903
904
905 // Initialize the class loader's access to methods in libzip. Parse and
906 // process the boot classpath into a list ClassPathEntry objects. Once
907 // this list has been created, it must not change order (see class PackageInfo)
908 // it can be appended to and is by jvmti and the kernel vm.
909
910 void ClassLoader::initialize() {
911 assert(_package_hash_table == NULL, "should have been initialized by now.");
912 EXCEPTION_MARK;
913
914 if (UsePerfData) {
915 // jvmstat performance counters
916 NEWPERFTICKCOUNTER(_perf_accumulated_time, SUN_CLS, "time");
917 NEWPERFTICKCOUNTER(_perf_class_init_time, SUN_CLS, "classInitTime");
918 NEWPERFTICKCOUNTER(_perf_class_init_selftime, SUN_CLS, "classInitTime.self");
919 NEWPERFTICKCOUNTER(_perf_class_verify_time, SUN_CLS, "classVerifyTime");
920 NEWPERFTICKCOUNTER(_perf_class_verify_selftime, SUN_CLS, "classVerifyTime.self");
921 NEWPERFTICKCOUNTER(_perf_class_link_time, SUN_CLS, "classLinkedTime");
922 NEWPERFTICKCOUNTER(_perf_class_link_selftime, SUN_CLS, "classLinkedTime.self");
923 NEWPERFEVENTCOUNTER(_perf_classes_inited, SUN_CLS, "initializedClasses");
924 NEWPERFEVENTCOUNTER(_perf_classes_linked, SUN_CLS, "linkedClasses");
925 NEWPERFEVENTCOUNTER(_perf_classes_verified, SUN_CLS, "verifiedClasses");
926
927 NEWPERFTICKCOUNTER(_perf_class_parse_time, SUN_CLS, "parseClassTime");
928 NEWPERFTICKCOUNTER(_perf_class_parse_selftime, SUN_CLS, "parseClassTime.self");
929 NEWPERFTICKCOUNTER(_perf_sys_class_lookup_time, SUN_CLS, "lookupSysClassTime");
930 NEWPERFTICKCOUNTER(_perf_shared_classload_time, SUN_CLS, "sharedClassLoadTime");
931 NEWPERFTICKCOUNTER(_perf_sys_classload_time, SUN_CLS, "sysClassLoadTime");
932 NEWPERFTICKCOUNTER(_perf_app_classload_time, SUN_CLS, "appClassLoadTime");
933 NEWPERFTICKCOUNTER(_perf_app_classload_selftime, SUN_CLS, "appClassLoadTime.self");
934 NEWPERFEVENTCOUNTER(_perf_app_classload_count, SUN_CLS, "appClassLoadCount");
935 NEWPERFTICKCOUNTER(_perf_define_appclasses, SUN_CLS, "defineAppClasses");
936 NEWPERFTICKCOUNTER(_perf_define_appclass_time, SUN_CLS, "defineAppClassTime");
937 NEWPERFTICKCOUNTER(_perf_define_appclass_selftime, SUN_CLS, "defineAppClassTime.self");
938 NEWPERFBYTECOUNTER(_perf_app_classfile_bytes_read, SUN_CLS, "appClassBytes");
939 NEWPERFBYTECOUNTER(_perf_sys_classfile_bytes_read, SUN_CLS, "sysClassBytes");
940
941
942 // The following performance counters are added for measuring the impact
943 // of the bug fix of 6365597. They are mainly focused on finding out
944 // the behavior of system & user-defined classloader lock, whether
945 // ClassLoader.loadClass/findClass is being called synchronized or not.
946 // Also two additional counters are created to see whether 'UnsyncloadClass'
947 // flag is being set or not and how many times load_instance_class call
948 // fails with linkageError etc.
949 NEWPERFEVENTCOUNTER(_sync_systemLoaderLockContentionRate, SUN_CLS,
950 "systemLoaderLockContentionRate");
951 NEWPERFEVENTCOUNTER(_sync_nonSystemLoaderLockContentionRate, SUN_CLS,
952 "nonSystemLoaderLockContentionRate");
953 NEWPERFEVENTCOUNTER(_sync_JVMFindLoadedClassLockFreeCounter, SUN_CLS,
954 "jvmFindLoadedClassNoLockCalls");
955 NEWPERFEVENTCOUNTER(_sync_JVMDefineClassLockFreeCounter, SUN_CLS,
956 "jvmDefineClassNoLockCalls");
957
958 NEWPERFEVENTCOUNTER(_sync_JNIDefineClassLockFreeCounter, SUN_CLS,
959 "jniDefineClassNoLockCalls");
960
961 NEWPERFEVENTCOUNTER(_unsafe_defineClassCallCounter, SUN_CLS,
962 "unsafeDefineClassCalls");
963
964 NEWPERFEVENTCOUNTER(_isUnsyncloadClass, SUN_CLS, "isUnsyncloadClassSet");
965 NEWPERFEVENTCOUNTER(_load_instance_class_failCounter, SUN_CLS,
966 "loadInstanceClassFailRate");
967
968 // increment the isUnsyncloadClass counter if UnsyncloadClass is set.
969 if (UnsyncloadClass) {
970 _isUnsyncloadClass->inc();
971 }
972 }
973
974 // lookup zip library entry points
975 load_zip_library();
976 // initialize search path
977 setup_bootstrap_search_path();
978 if (LazyBootClassLoader) {
979 // set up meta index which makes boot classpath initialization lazier
980 setup_meta_index();
981 }
982 }
983
984
985 jlong ClassLoader::classloader_time_ms() {
986 return UsePerfData ?
987 Management::ticks_to_ms(_perf_accumulated_time->get_value()) : -1;
988 }
989
990 jlong ClassLoader::class_init_count() {
991 return UsePerfData ? _perf_classes_inited->get_value() : -1;
992 }
993
994 jlong ClassLoader::class_init_time_ms() {
995 return UsePerfData ?
996 Management::ticks_to_ms(_perf_class_init_time->get_value()) : -1;
997 }
998
999 jlong ClassLoader::class_verify_time_ms() {
1000 return UsePerfData ?
1001 Management::ticks_to_ms(_perf_class_verify_time->get_value()) : -1;
1002 }
1003
1004 jlong ClassLoader::class_link_count() {
1005 return UsePerfData ? _perf_classes_linked->get_value() : -1;
1006 }
1007
1008 jlong ClassLoader::class_link_time_ms() {
1009 return UsePerfData ?
1010 Management::ticks_to_ms(_perf_class_link_time->get_value()) : -1;
1011 }
1012
1013 int ClassLoader::compute_Object_vtable() {
1014 // hardwired for JDK1.2 -- would need to duplicate class file parsing
1015 // code to determine actual value from file
1016 // Would be value '11' if finals were in vtable
1017 int JDK_1_2_Object_vtable_size = 5;
1018 return JDK_1_2_Object_vtable_size * vtableEntry::size();
1019 }
1020
1021
1022 void classLoader_init() {
1023 ClassLoader::initialize();
1024 }
1025
1026
1027 bool ClassLoader::get_canonical_path(char* orig, char* out, int len) {
1028 assert(orig != NULL && out != NULL && len > 0, "bad arguments");
1029 if (CanonicalizeEntry != NULL) {
1030 JNIEnv* env = JavaThread::current()->jni_environment();
1031 if ((CanonicalizeEntry)(env, hpi::native_path(orig), out, len) < 0) {
1032 return false;
1033 }
1034 } else {
1035 // On JDK 1.2.2 the Canonicalize does not exist, so just do nothing
1036 strncpy(out, orig, len);
1037 out[len - 1] = '\0';
1038 }
1039 return true;
1040 }
1041
1042 #ifndef PRODUCT
1043
1044 void ClassLoader::verify() {
1045 _package_hash_table->verify();
1046 }
1047
1048
1049 // CompileTheWorld
1050 //
1051 // Iterates over all class path entries and forces compilation of all methods
1052 // in all classes found. Currently, only zip/jar archives are searched.
1053 //
1054 // The classes are loaded by the Java level bootstrap class loader, and the
1055 // initializer is called. If DelayCompilationDuringStartup is true (default),
1056 // the interpreter will run the initialization code. Note that forcing
1057 // initialization in this way could potentially lead to initialization order
1058 // problems, in which case we could just force the initialization bit to be set.
1059
1060
1061 // We need to iterate over the contents of a zip/jar file, so we replicate the
1062 // jzcell and jzfile definitions from zip_util.h but rename jzfile to real_jzfile,
1063 // since jzfile already has a void* definition.
1064 //
1065 // Note that this is only used in debug mode.
1066 //
1067 // HotSpot integration note:
1068 // Matches zip_util.h 1.14 99/06/01 from jdk1.3 beta H build
1069
1070
1071 // JDK 1.3 version
1072 typedef struct real_jzentry13 { /* Zip file entry */
1073 char *name; /* entry name */
1074 jint time; /* modification time */
1075 jint size; /* size of uncompressed data */
1076 jint csize; /* size of compressed data (zero if uncompressed) */
1077 jint crc; /* crc of uncompressed data */
1078 char *comment; /* optional zip file comment */
1079 jbyte *extra; /* optional extra data */
1080 jint pos; /* position of LOC header (if negative) or data */
1081 } real_jzentry13;
1082
1083 typedef struct real_jzfile13 { /* Zip file */
1084 char *name; /* zip file name */
1085 jint refs; /* number of active references */
1086 jint fd; /* open file descriptor */
1087 void *lock; /* read lock */
1088 char *comment; /* zip file comment */
1089 char *msg; /* zip error message */
1090 void *entries; /* array of hash cells */
1091 jint total; /* total number of entries */
1092 unsigned short *table; /* Hash chain heads: indexes into entries */
1093 jint tablelen; /* number of hash eads */
1094 real_jzfile13 *next; /* next zip file in search list */
1095 jzentry *cache; /* we cache the most recently freed jzentry */
1096 /* Information on metadata names in META-INF directory */
1097 char **metanames; /* array of meta names (may have null names) */
1098 jint metacount; /* number of slots in metanames array */
1099 /* If there are any per-entry comments, they are in the comments array */
1100 char **comments;
1101 } real_jzfile13;
1102
1103 // JDK 1.2 version
1104 typedef struct real_jzentry12 { /* Zip file entry */
1105 char *name; /* entry name */
1106 jint time; /* modification time */
1107 jint size; /* size of uncompressed data */
1108 jint csize; /* size of compressed data (zero if uncompressed) */
1109 jint crc; /* crc of uncompressed data */
1110 char *comment; /* optional zip file comment */
1111 jbyte *extra; /* optional extra data */
1112 jint pos; /* position of LOC header (if negative) or data */
1113 struct real_jzentry12 *next; /* next entry in hash table */
1114 } real_jzentry12;
1115
1116 typedef struct real_jzfile12 { /* Zip file */
1117 char *name; /* zip file name */
1118 jint refs; /* number of active references */
1119 jint fd; /* open file descriptor */
1120 void *lock; /* read lock */
1121 char *comment; /* zip file comment */
1122 char *msg; /* zip error message */
1123 real_jzentry12 *entries; /* array of zip entries */
1124 jint total; /* total number of entries */
1125 real_jzentry12 **table; /* hash table of entries */
1126 jint tablelen; /* number of buckets */
1127 jzfile *next; /* next zip file in search list */
1128 } real_jzfile12;
1129
1130
1131 void ClassPathDirEntry::compile_the_world(Handle loader, TRAPS) {
1132 // For now we only compile all methods in all classes in zip/jar files
1133 tty->print_cr("CompileTheWorld : Skipped classes in %s", _dir);
1134 tty->cr();
1135 }
1136
1137
1138 bool ClassPathDirEntry::is_rt_jar() {
1139 return false;
1140 }
1141
1142 void ClassPathZipEntry::compile_the_world(Handle loader, TRAPS) {
1143 if (JDK_Version::is_jdk12x_version()) {
1144 compile_the_world12(loader, THREAD);
1145 } else {
1146 compile_the_world13(loader, THREAD);
1147 }
1148 if (HAS_PENDING_EXCEPTION) {
1149 if (PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())) {
1150 CLEAR_PENDING_EXCEPTION;
1151 tty->print_cr("\nCompileTheWorld : Ran out of memory\n");
1152 size_t used = Universe::heap()->permanent_used();
1153 size_t capacity = Universe::heap()->permanent_capacity();
1154 tty->print_cr("Permanent generation used %dK of %dK", used/K, capacity/K);
1155 tty->print_cr("Increase size by setting e.g. -XX:MaxPermSize=%dK\n", capacity*2/K);
1156 } else {
1157 tty->print_cr("\nCompileTheWorld : Unexpected exception occurred\n");
1158 }
1159 }
1160 }
1161
1162 // Version that works for JDK 1.3.x
1163 void ClassPathZipEntry::compile_the_world13(Handle loader, TRAPS) {
1164 real_jzfile13* zip = (real_jzfile13*) _zip;
1165 tty->print_cr("CompileTheWorld : Compiling all classes in %s", zip->name);
1166 tty->cr();
1167 // Iterate over all entries in zip file
1168 for (int n = 0; ; n++) {
1169 real_jzentry13 * ze = (real_jzentry13 *)((*GetNextEntry)(_zip, n));
1170 if (ze == NULL) break;
1171 ClassLoader::compile_the_world_in(ze->name, loader, CHECK);
1172 }
1173 }
1174
1175
1176 // Version that works for JDK 1.2.x
1177 void ClassPathZipEntry::compile_the_world12(Handle loader, TRAPS) {
1178 real_jzfile12* zip = (real_jzfile12*) _zip;
1179 tty->print_cr("CompileTheWorld : Compiling all classes in %s", zip->name);
1180 tty->cr();
1181 // Iterate over all entries in zip file
1182 for (int n = 0; ; n++) {
1183 real_jzentry12 * ze = (real_jzentry12 *)((*GetNextEntry)(_zip, n));
1184 if (ze == NULL) break;
1185 ClassLoader::compile_the_world_in(ze->name, loader, CHECK);
1186 }
1187 }
1188
1189 bool ClassPathZipEntry::is_rt_jar() {
1190 if (JDK_Version::is_jdk12x_version()) {
1191 return is_rt_jar12();
1192 } else {
1193 return is_rt_jar13();
1194 }
1195 }
1196
1197 // JDK 1.3 version
1198 bool ClassPathZipEntry::is_rt_jar13() {
1199 real_jzfile13* zip = (real_jzfile13*) _zip;
1200 int len = (int)strlen(zip->name);
1201 // Check whether zip name ends in "rt.jar"
1202 // This will match other archives named rt.jar as well, but this is
1203 // only used for debugging.
1204 return (len >= 6) && (strcasecmp(zip->name + len - 6, "rt.jar") == 0);
1205 }
1206
1207 // JDK 1.2 version
1208 bool ClassPathZipEntry::is_rt_jar12() {
1209 real_jzfile12* zip = (real_jzfile12*) _zip;
1210 int len = (int)strlen(zip->name);
1211 // Check whether zip name ends in "rt.jar"
1212 // This will match other archives named rt.jar as well, but this is
1213 // only used for debugging.
1214 return (len >= 6) && (strcasecmp(zip->name + len - 6, "rt.jar") == 0);
1215 }
1216
1217 void LazyClassPathEntry::compile_the_world(Handle loader, TRAPS) {
1218 resolve_entry()->compile_the_world(loader, CHECK);
1219 }
1220
1221 bool LazyClassPathEntry::is_rt_jar() {
1222 return resolve_entry()->is_rt_jar();
1223 }
1224
1225 void ClassLoader::compile_the_world() {
1226 EXCEPTION_MARK;
1227 HandleMark hm(THREAD);
1228 ResourceMark rm(THREAD);
1229 // Make sure we don't run with background compilation
1230 BackgroundCompilation = false;
1231 // Find bootstrap loader
1232 Handle system_class_loader (THREAD, SystemDictionary::java_system_loader());
1233 // Iterate over all bootstrap class path entries
1234 ClassPathEntry* e = _first_entry;
1235 while (e != NULL) {
1236 // We stop at rt.jar, unless it is the first bootstrap path entry
1237 if (e->is_rt_jar() && e != _first_entry) break;
1238 e->compile_the_world(system_class_loader, CATCH);
1239 e = e->next();
1240 }
1241 tty->print_cr("CompileTheWorld : Done");
1242 {
1243 // Print statistics as if before normal exit:
1244 extern void print_statistics();
1245 print_statistics();
1246 }
1247 vm_exit(0);
1248 }
1249
1250 int ClassLoader::_compile_the_world_counter = 0;
1251 static int _codecache_sweep_counter = 0;
1252
1253 void ClassLoader::compile_the_world_in(char* name, Handle loader, TRAPS) {
1254 int len = (int)strlen(name);
1255 if (len > 6 && strcmp(".class", name + len - 6) == 0) {
1256 // We have a .class file
1257 char buffer[2048];
1258 strncpy(buffer, name, len - 6);
1259 buffer[len-6] = 0;
1260 // If the file has a period after removing .class, it's not really a
1261 // valid class file. The class loader will check everything else.
1262 if (strchr(buffer, '.') == NULL) {
1263 _compile_the_world_counter++;
1264 if (_compile_the_world_counter > CompileTheWorldStopAt) return;
1265
1266 // Construct name without extension
1267 symbolHandle sym = oopFactory::new_symbol_handle(buffer, CHECK);
1268 // Use loader to load and initialize class
1269 klassOop ik = SystemDictionary::resolve_or_null(sym, loader, Handle(), THREAD);
1270 instanceKlassHandle k (THREAD, ik);
1271 if (k.not_null() && !HAS_PENDING_EXCEPTION) {
1272 k->initialize(THREAD);
1273 }
1274 bool exception_occurred = HAS_PENDING_EXCEPTION;
1275 CLEAR_PENDING_EXCEPTION;
1276 if (CompileTheWorldPreloadClasses && k.not_null()) {
1277 constantPoolKlass::preload_and_initialize_all_classes(k->constants(), THREAD);
1278 if (HAS_PENDING_EXCEPTION) {
1279 // If something went wrong in preloading we just ignore it
1280 CLEAR_PENDING_EXCEPTION;
1281 tty->print_cr("Preloading failed for (%d) %s", _compile_the_world_counter, buffer);
1282 }
1283 }
1284
1285 if (_compile_the_world_counter >= CompileTheWorldStartAt) {
1286 if (k.is_null() || (exception_occurred && !CompileTheWorldIgnoreInitErrors)) {
1287 // If something went wrong (e.g. ExceptionInInitializerError) we skip this class
1288 tty->print_cr("CompileTheWorld (%d) : Skipping %s", _compile_the_world_counter, buffer);
1289 } else {
1290 tty->print_cr("CompileTheWorld (%d) : %s", _compile_the_world_counter, buffer);
1291 // Preload all classes to get around uncommon traps
1292 // Iterate over all methods in class
1293 for (int n = 0; n < k->methods()->length(); n++) {
1294 methodHandle m (THREAD, methodOop(k->methods()->obj_at(n)));
1295 if (CompilationPolicy::can_be_compiled(m)) {
1296
1297 if (++_codecache_sweep_counter == CompileTheWorldSafepointInterval) {
1298 // Give sweeper a chance to keep up with CTW
1299 VM_ForceSafepoint op;
1300 VMThread::execute(&op);
1301 _codecache_sweep_counter = 0;
1302 }
1303 // Force compilation
1304 CompileBroker::compile_method(m, InvocationEntryBci, CompLevel_initial_compile,
1305 methodHandle(), 0, "CTW", THREAD);
1306 if (HAS_PENDING_EXCEPTION) {
1307 CLEAR_PENDING_EXCEPTION;
1308 tty->print_cr("CompileTheWorld (%d) : Skipping method: %s", _compile_the_world_counter, m->name()->as_C_string());
1309 }
1310 if (TieredCompilation) {
1311 // Clobber the first compile and force second tier compilation
1312 nmethod* nm = m->code();
1313 if (nm != NULL) {
1314 // Throw out the code so that the code cache doesn't fill up
1315 nm->make_not_entrant();
1316 m->clear_code();
1317 }
1318 CompileBroker::compile_method(m, InvocationEntryBci, CompLevel_full_optimization,
1319 methodHandle(), 0, "CTW", THREAD);
1320 if (HAS_PENDING_EXCEPTION) {
1321 CLEAR_PENDING_EXCEPTION;
1322 tty->print_cr("CompileTheWorld (%d) : Skipping method: %s", _compile_the_world_counter, m->name()->as_C_string());
1323 }
1324 }
1325 }
1326
1327 nmethod* nm = m->code();
1328 if (nm != NULL) {
1329 // Throw out the code so that the code cache doesn't fill up
1330 nm->make_not_entrant();
1331 m->clear_code();
1332 }
1333 }
1334 }
1335 }
1336 }
1337 }
1338 }
1339
1340 #endif //PRODUCT