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comparison src/share/vm/classfile/classLoader.cpp @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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-1:000000000000 0:a61af66fc99e
1 /*
2 * Copyright 1997-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any 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_verify_time = NULL;
52 PerfCounter* ClassLoader::_perf_classes_linked = NULL;
53 PerfCounter* ClassLoader::_perf_class_link_time = NULL;
54 PerfCounter* ClassLoader::_sync_systemLoaderLockContentionRate = NULL;
55 PerfCounter* ClassLoader::_sync_nonSystemLoaderLockContentionRate = NULL;
56 PerfCounter* ClassLoader::_sync_JVMFindLoadedClassLockFreeCounter = NULL;
57 PerfCounter* ClassLoader::_sync_JVMDefineClassLockFreeCounter = NULL;
58 PerfCounter* ClassLoader::_sync_JNIDefineClassLockFreeCounter = NULL;
59 PerfCounter* ClassLoader::_unsafe_defineClassCallCounter = NULL;
60 PerfCounter* ClassLoader::_isUnsyncloadClass = NULL;
61 PerfCounter* ClassLoader::_load_instance_class_failCounter = NULL;
62
63 ClassPathEntry* ClassLoader::_first_entry = NULL;
64 ClassPathEntry* ClassLoader::_last_entry = NULL;
65 PackageHashtable* ClassLoader::_package_hash_table = NULL;
66
67 // helper routines
68 bool string_starts_with(const char* str, const char* str_to_find) {
69 size_t str_len = strlen(str);
70 size_t str_to_find_len = strlen(str_to_find);
71 if (str_to_find_len > str_len) {
72 return false;
73 }
74 return (strncmp(str, str_to_find, str_to_find_len) == 0);
75 }
76
77 bool string_ends_with(const char* str, const char* str_to_find) {
78 size_t str_len = strlen(str);
79 size_t str_to_find_len = strlen(str_to_find);
80 if (str_to_find_len > str_len) {
81 return false;
82 }
83 return (strncmp(str + (str_len - str_to_find_len), str_to_find, str_to_find_len) == 0);
84 }
85
86
87 MetaIndex::MetaIndex(char** meta_package_names, int num_meta_package_names) {
88 if (num_meta_package_names == 0) {
89 _meta_package_names = NULL;
90 _num_meta_package_names = 0;
91 } else {
92 _meta_package_names = NEW_C_HEAP_ARRAY(char*, num_meta_package_names);
93 _num_meta_package_names = num_meta_package_names;
94 memcpy(_meta_package_names, meta_package_names, num_meta_package_names * sizeof(char*));
95 }
96 }
97
98
99 MetaIndex::~MetaIndex() {
100 FREE_C_HEAP_ARRAY(char*, _meta_package_names);
101 }
102
103
104 bool MetaIndex::may_contain(const char* class_name) {
105 if ( _num_meta_package_names == 0) {
106 return false;
107 }
108 size_t class_name_len = strlen(class_name);
109 for (int i = 0; i < _num_meta_package_names; i++) {
110 char* pkg = _meta_package_names[i];
111 size_t pkg_len = strlen(pkg);
112 size_t min_len = MIN2(class_name_len, pkg_len);
113 if (!strncmp(class_name, pkg, min_len)) {
114 return true;
115 }
116 }
117 return false;
118 }
119
120
121 ClassPathEntry::ClassPathEntry() {
122 set_next(NULL);
123 }
124
125
126 bool ClassPathEntry::is_lazy() {
127 return false;
128 }
129
130 ClassPathDirEntry::ClassPathDirEntry(char* dir) : ClassPathEntry() {
131 _dir = NEW_C_HEAP_ARRAY(char, strlen(dir)+1);
132 strcpy(_dir, dir);
133 }
134
135
136 ClassFileStream* ClassPathDirEntry::open_stream(const char* name) {
137 // construct full path name
138 char path[JVM_MAXPATHLEN];
139 if (jio_snprintf(path, sizeof(path), "%s%s%s", _dir, os::file_separator(), name) == -1) {
140 return NULL;
141 }
142 // check if file exists
143 struct stat st;
144 if (os::stat(path, &st) == 0) {
145 // found file, open it
146 int file_handle = hpi::open(path, 0, 0);
147 if (file_handle != -1) {
148 // read contents into resource array
149 u1* buffer = NEW_RESOURCE_ARRAY(u1, st.st_size);
150 size_t num_read = os::read(file_handle, (char*) buffer, st.st_size);
151 // close file
152 hpi::close(file_handle);
153 // construct ClassFileStream
154 if (num_read == (size_t)st.st_size) {
155 return new ClassFileStream(buffer, st.st_size, _dir); // Resource allocated
156 }
157 }
158 }
159 return NULL;
160 }
161
162
163 ClassPathZipEntry::ClassPathZipEntry(jzfile* zip, const char* zip_name) : ClassPathEntry() {
164 _zip = zip;
165 _zip_name = NEW_C_HEAP_ARRAY(char, strlen(zip_name)+1);
166 strcpy(_zip_name, zip_name);
167 }
168
169 ClassPathZipEntry::~ClassPathZipEntry() {
170 if (ZipClose != NULL) {
171 (*ZipClose)(_zip);
172 }
173 FREE_C_HEAP_ARRAY(char, _zip_name);
174 }
175
176 ClassFileStream* ClassPathZipEntry::open_stream(const char* name) {
177 // enable call to C land
178 JavaThread* thread = JavaThread::current();
179 ThreadToNativeFromVM ttn(thread);
180 // check whether zip archive contains name
181 jint filesize, name_len;
182 jzentry* entry = (*FindEntry)(_zip, name, &filesize, &name_len);
183 if (entry == NULL) return NULL;
184 u1* buffer;
185 char name_buf[128];
186 char* filename;
187 if (name_len < 128) {
188 filename = name_buf;
189 } else {
190 filename = NEW_RESOURCE_ARRAY(char, name_len + 1);
191 }
192
193 // file found, get pointer to class in mmaped jar file.
194 if (ReadMappedEntry == NULL ||
195 !(*ReadMappedEntry)(_zip, entry, &buffer, filename)) {
196 // mmaped access not available, perhaps due to compression,
197 // read contents into resource array
198 buffer = NEW_RESOURCE_ARRAY(u1, filesize);
199 if (!(*ReadEntry)(_zip, entry, buffer, filename)) return NULL;
200 }
201 // return result
202 return new ClassFileStream(buffer, filesize, _zip_name); // Resource allocated
203 }
204
205 // invoke function for each entry in the zip file
206 void ClassPathZipEntry::contents_do(void f(const char* name, void* context), void* context) {
207 JavaThread* thread = JavaThread::current();
208 HandleMark handle_mark(thread);
209 ThreadToNativeFromVM ttn(thread);
210 for (int n = 0; ; n++) {
211 jzentry * ze = ((*GetNextEntry)(_zip, n));
212 if (ze == NULL) break;
213 (*f)(ze->name, context);
214 }
215 }
216
217 LazyClassPathEntry::LazyClassPathEntry(char* path, struct stat st) : ClassPathEntry() {
218 _path = strdup(path);
219 _st = st;
220 _meta_index = NULL;
221 _resolved_entry = NULL;
222 }
223
224 bool LazyClassPathEntry::is_jar_file() {
225 return ((_st.st_mode & S_IFREG) == S_IFREG);
226 }
227
228 ClassPathEntry* LazyClassPathEntry::resolve_entry() {
229 if (_resolved_entry != NULL) {
230 return (ClassPathEntry*) _resolved_entry;
231 }
232 ClassPathEntry* new_entry = NULL;
233 ClassLoader::create_class_path_entry(_path, _st, &new_entry, false);
234 assert(new_entry != NULL, "earlier code should have caught this");
235 {
236 ThreadCritical tc;
237 if (_resolved_entry == NULL) {
238 _resolved_entry = new_entry;
239 return new_entry;
240 }
241 }
242 assert(_resolved_entry != NULL, "bug in MT-safe resolution logic");
243 delete new_entry;
244 return (ClassPathEntry*) _resolved_entry;
245 }
246
247 ClassFileStream* LazyClassPathEntry::open_stream(const char* name) {
248 if (_meta_index != NULL &&
249 !_meta_index->may_contain(name)) {
250 return NULL;
251 }
252 return resolve_entry()->open_stream(name);
253 }
254
255 bool LazyClassPathEntry::is_lazy() {
256 return true;
257 }
258
259 static void print_meta_index(LazyClassPathEntry* entry,
260 GrowableArray<char*>& meta_packages) {
261 tty->print("[Meta index for %s=", entry->name());
262 for (int i = 0; i < meta_packages.length(); i++) {
263 if (i > 0) tty->print(" ");
264 tty->print(meta_packages.at(i));
265 }
266 tty->print_cr("]");
267 }
268
269
270 void ClassLoader::setup_meta_index() {
271 // Set up meta index which allows us to open boot jars lazily if
272 // class data sharing is enabled
273 const char* known_version = "% VERSION 2";
274 char* meta_index_path = Arguments::get_meta_index_path();
275 char* meta_index_dir = Arguments::get_meta_index_dir();
276 FILE* file = fopen(meta_index_path, "r");
277 int line_no = 0;
278 if (file != NULL) {
279 ResourceMark rm;
280 LazyClassPathEntry* cur_entry = NULL;
281 GrowableArray<char*> boot_class_path_packages(10);
282 char package_name[256];
283 bool skipCurrentJar = false;
284 while (fgets(package_name, sizeof(package_name), file) != NULL) {
285 ++line_no;
286 // Remove trailing newline
287 package_name[strlen(package_name) - 1] = '\0';
288 switch(package_name[0]) {
289 case '%':
290 {
291 if ((line_no == 1) && (strcmp(package_name, known_version) != 0)) {
292 if (TraceClassLoading && Verbose) {
293 tty->print("[Unsupported meta index version]");
294 }
295 fclose(file);
296 return;
297 }
298 }
299
300 // These directives indicate jar files which contain only
301 // classes, only non-classfile resources, or a combination of
302 // the two. See src/share/classes/sun/misc/MetaIndex.java and
303 // make/tools/MetaIndex/BuildMetaIndex.java in the J2SE
304 // workspace.
305 case '#':
306 case '!':
307 case '@':
308 {
309 // Hand off current packages to current lazy entry (if any)
310 if ((cur_entry != NULL) &&
311 (boot_class_path_packages.length() > 0)) {
312 if (TraceClassLoading && Verbose) {
313 print_meta_index(cur_entry, boot_class_path_packages);
314 }
315 MetaIndex* index = new MetaIndex(boot_class_path_packages.adr_at(0),
316 boot_class_path_packages.length());
317 cur_entry->set_meta_index(index);
318 }
319 cur_entry = NULL;
320 boot_class_path_packages.clear();
321
322 // Find lazy entry corresponding to this jar file
323 for (ClassPathEntry* entry = _first_entry; entry != NULL; entry = entry->next()) {
324 if (entry->is_lazy() &&
325 string_starts_with(entry->name(), meta_index_dir) &&
326 string_ends_with(entry->name(), &package_name[2])) {
327 cur_entry = (LazyClassPathEntry*) entry;
328 break;
329 }
330 }
331
332 // If the first character is '@', it indicates the following jar
333 // file is a resource only jar file in which case, we should skip
334 // reading the subsequent entries since the resource loading is
335 // totally handled by J2SE side.
336 if (package_name[0] == '@') {
337 if (cur_entry != NULL) {
338 cur_entry->set_meta_index(new MetaIndex(NULL, 0));
339 }
340 cur_entry = NULL;
341 skipCurrentJar = true;
342 } else {
343 skipCurrentJar = false;
344 }
345
346 break;
347 }
348
349 default:
350 {
351 if (!skipCurrentJar && cur_entry != NULL) {
352 char* new_name = strdup(package_name);
353 boot_class_path_packages.append(new_name);
354 }
355 }
356 }
357 }
358 // Hand off current packages to current lazy entry (if any)
359 if ((cur_entry != NULL) &&
360 (boot_class_path_packages.length() > 0)) {
361 if (TraceClassLoading && Verbose) {
362 print_meta_index(cur_entry, boot_class_path_packages);
363 }
364 MetaIndex* index = new MetaIndex(boot_class_path_packages.adr_at(0),
365 boot_class_path_packages.length());
366 cur_entry->set_meta_index(index);
367 }
368 fclose(file);
369 }
370 }
371
372 void ClassLoader::setup_bootstrap_search_path() {
373 assert(_first_entry == NULL, "should not setup bootstrap class search path twice");
374 char* sys_class_path = os::strdup(Arguments::get_sysclasspath());
375 if (TraceClassLoading && Verbose) {
376 tty->print_cr("[Bootstrap loader class path=%s]", sys_class_path);
377 }
378
379 int len = (int)strlen(sys_class_path);
380 int end = 0;
381
382 // Iterate over class path entries
383 for (int start = 0; start < len; start = end) {
384 while (sys_class_path[end] && sys_class_path[end] != os::path_separator()[0]) {
385 end++;
386 }
387 char* path = NEW_C_HEAP_ARRAY(char, end-start+1);
388 strncpy(path, &sys_class_path[start], end-start);
389 path[end-start] = '\0';
390 update_class_path_entry_list(path, false);
391 FREE_C_HEAP_ARRAY(char, path);
392 while (sys_class_path[end] == os::path_separator()[0]) {
393 end++;
394 }
395 }
396 }
397
398 void ClassLoader::create_class_path_entry(char *path, struct stat st, ClassPathEntry **new_entry, bool lazy) {
399 JavaThread* thread = JavaThread::current();
400 if (lazy) {
401 *new_entry = new LazyClassPathEntry(path, st);
402 return;
403 }
404 if ((st.st_mode & S_IFREG) == S_IFREG) {
405 // Regular file, should be a zip file
406 // Canonicalized filename
407 char canonical_path[JVM_MAXPATHLEN];
408 if (!get_canonical_path(path, canonical_path, JVM_MAXPATHLEN)) {
409 // This matches the classic VM
410 EXCEPTION_MARK;
411 THROW_MSG(vmSymbols::java_io_IOException(), "Bad pathname");
412 }
413 char* error_msg = NULL;
414 jzfile* zip;
415 {
416 // enable call to C land
417 ThreadToNativeFromVM ttn(thread);
418 HandleMark hm(thread);
419 zip = (*ZipOpen)(canonical_path, &error_msg);
420 }
421 if (zip != NULL && error_msg == NULL) {
422 *new_entry = new ClassPathZipEntry(zip, path);
423 if (TraceClassLoading) {
424 tty->print_cr("[Opened %s]", path);
425 }
426 } else {
427 ResourceMark rm(thread);
428 char *msg;
429 if (error_msg == NULL) {
430 msg = NEW_RESOURCE_ARRAY(char, strlen(path) + 128); ;
431 jio_snprintf(msg, strlen(path) + 127, "error in opening JAR file %s", path);
432 } else {
433 int len = (int)(strlen(path) + strlen(error_msg) + 128);
434 msg = NEW_RESOURCE_ARRAY(char, len); ;
435 jio_snprintf(msg, len - 1, "error in opening JAR file <%s> %s", error_msg, path);
436 }
437 EXCEPTION_MARK;
438 THROW_MSG(vmSymbols::java_lang_ClassNotFoundException(), msg);
439 }
440 } else {
441 // Directory
442 *new_entry = new ClassPathDirEntry(path);
443 if (TraceClassLoading) {
444 tty->print_cr("[Path %s]", path);
445 }
446 }
447 }
448
449
450 // Create a class path zip entry for a given path (return NULL if not found
451 // or zip/JAR file cannot be opened)
452 ClassPathZipEntry* ClassLoader::create_class_path_zip_entry(const char *path) {
453 // check for a regular file
454 struct stat st;
455 if (os::stat(path, &st) == 0) {
456 if ((st.st_mode & S_IFREG) == S_IFREG) {
457 char orig_path[JVM_MAXPATHLEN];
458 char canonical_path[JVM_MAXPATHLEN];
459
460 strcpy(orig_path, path);
461 if (get_canonical_path(orig_path, canonical_path, JVM_MAXPATHLEN)) {
462 char* error_msg = NULL;
463 jzfile* zip;
464 {
465 // enable call to C land
466 JavaThread* thread = JavaThread::current();
467 ThreadToNativeFromVM ttn(thread);
468 HandleMark hm(thread);
469 zip = (*ZipOpen)(canonical_path, &error_msg);
470 }
471 if (zip != NULL && error_msg == NULL) {
472 // create using canonical path
473 return new ClassPathZipEntry(zip, canonical_path);
474 }
475 }
476 }
477 }
478 return NULL;
479 }
480
481 // returns true if entry already on class path
482 bool ClassLoader::contains_entry(ClassPathEntry *entry) {
483 ClassPathEntry* e = _first_entry;
484 while (e != NULL) {
485 // assume zip entries have been canonicalized
486 if (strcmp(entry->name(), e->name()) == 0) {
487 return true;
488 }
489 e = e->next();
490 }
491 return false;
492 }
493
494 void ClassLoader::add_to_list(ClassPathEntry *new_entry) {
495 if (new_entry != NULL) {
496 if (_last_entry == NULL) {
497 _first_entry = _last_entry = new_entry;
498 } else {
499 _last_entry->set_next(new_entry);
500 _last_entry = new_entry;
501 }
502 }
503 }
504
505 void ClassLoader::update_class_path_entry_list(const char *path,
506 bool check_for_duplicates) {
507 struct stat st;
508 if (os::stat((char *)path, &st) == 0) {
509 // File or directory found
510 ClassPathEntry* new_entry = NULL;
511 create_class_path_entry((char *)path, st, &new_entry, LazyBootClassLoader);
512 // The kernel VM adds dynamically to the end of the classloader path and
513 // doesn't reorder the bootclasspath which would break java.lang.Package
514 // (see PackageInfo).
515 // Add new entry to linked list
516 if (!check_for_duplicates || !contains_entry(new_entry)) {
517 add_to_list(new_entry);
518 }
519 }
520 }
521
522 void ClassLoader::print_bootclasspath() {
523 ClassPathEntry* e = _first_entry;
524 tty->print("[bootclasspath= ");
525 while (e != NULL) {
526 tty->print("%s ;", e->name());
527 e = e->next();
528 }
529 tty->print_cr("]");
530 }
531
532 void ClassLoader::load_zip_library() {
533 assert(ZipOpen == NULL, "should not load zip library twice");
534 // First make sure native library is loaded
535 os::native_java_library();
536 // Load zip library
537 char path[JVM_MAXPATHLEN];
538 char ebuf[1024];
539 hpi::dll_build_name(path, sizeof(path), Arguments::get_dll_dir(), "zip");
540 void* handle = hpi::dll_load(path, ebuf, sizeof ebuf);
541 if (handle == NULL) {
542 vm_exit_during_initialization("Unable to load ZIP library", path);
543 }
544 // Lookup zip entry points
545 ZipOpen = CAST_TO_FN_PTR(ZipOpen_t, hpi::dll_lookup(handle, "ZIP_Open"));
546 ZipClose = CAST_TO_FN_PTR(ZipClose_t, hpi::dll_lookup(handle, "ZIP_Close"));
547 FindEntry = CAST_TO_FN_PTR(FindEntry_t, hpi::dll_lookup(handle, "ZIP_FindEntry"));
548 ReadEntry = CAST_TO_FN_PTR(ReadEntry_t, hpi::dll_lookup(handle, "ZIP_ReadEntry"));
549 ReadMappedEntry = CAST_TO_FN_PTR(ReadMappedEntry_t, hpi::dll_lookup(handle, "ZIP_ReadMappedEntry"));
550 GetNextEntry = CAST_TO_FN_PTR(GetNextEntry_t, hpi::dll_lookup(handle, "ZIP_GetNextEntry"));
551
552 // ZIP_Close is not exported on Windows in JDK5.0 so don't abort if ZIP_Close is NULL
553 if (ZipOpen == NULL || FindEntry == NULL || ReadEntry == NULL || GetNextEntry == NULL) {
554 vm_exit_during_initialization("Corrupted ZIP library", path);
555 }
556
557 // Lookup canonicalize entry in libjava.dll
558 void *javalib_handle = os::native_java_library();
559 CanonicalizeEntry = CAST_TO_FN_PTR(canonicalize_fn_t, hpi::dll_lookup(javalib_handle, "Canonicalize"));
560 // This lookup only works on 1.3. Do not check for non-null here
561 }
562
563 // PackageInfo data exists in order to support the java.lang.Package
564 // class. A Package object provides information about a java package
565 // (version, vendor, etc.) which originates in the manifest of the jar
566 // file supplying the package. For application classes, the ClassLoader
567 // object takes care of this.
568
569 // For system (boot) classes, the Java code in the Package class needs
570 // to be able to identify which source jar file contained the boot
571 // class, so that it can extract the manifest from it. This table
572 // identifies java packages with jar files in the boot classpath.
573
574 // Because the boot classpath cannot change, the classpath index is
575 // sufficient to identify the source jar file or directory. (Since
576 // directories have no manifests, the directory name is not required,
577 // but is available.)
578
579 // When using sharing -- the pathnames of entries in the boot classpath
580 // may not be the same at runtime as they were when the archive was
581 // created (NFS, Samba, etc.). The actual files and directories named
582 // in the classpath must be the same files, in the same order, even
583 // though the exact name is not the same.
584
585 class PackageInfo: public BasicHashtableEntry {
586 public:
587 const char* _pkgname; // Package name
588 int _classpath_index; // Index of directory or JAR file loaded from
589
590 PackageInfo* next() {
591 return (PackageInfo*)BasicHashtableEntry::next();
592 }
593
594 const char* pkgname() { return _pkgname; }
595 void set_pkgname(char* pkgname) { _pkgname = pkgname; }
596
597 const char* filename() {
598 return ClassLoader::classpath_entry(_classpath_index)->name();
599 }
600
601 void set_index(int index) {
602 _classpath_index = index;
603 }
604 };
605
606
607 class PackageHashtable : public BasicHashtable {
608 private:
609 inline unsigned int compute_hash(const char *s, int n) {
610 unsigned int val = 0;
611 while (--n >= 0) {
612 val = *s++ + 31 * val;
613 }
614 return val;
615 }
616
617 PackageInfo* bucket(int index) {
618 return (PackageInfo*)BasicHashtable::bucket(index);
619 }
620
621 PackageInfo* get_entry(int index, unsigned int hash,
622 const char* pkgname, size_t n) {
623 for (PackageInfo* pp = bucket(index); pp != NULL; pp = pp->next()) {
624 if (pp->hash() == hash &&
625 strncmp(pkgname, pp->pkgname(), n) == 0 &&
626 pp->pkgname()[n] == '\0') {
627 return pp;
628 }
629 }
630 return NULL;
631 }
632
633 public:
634 PackageHashtable(int table_size)
635 : BasicHashtable(table_size, sizeof(PackageInfo)) {}
636
637 PackageHashtable(int table_size, HashtableBucket* t, int number_of_entries)
638 : BasicHashtable(table_size, sizeof(PackageInfo), t, number_of_entries) {}
639
640 PackageInfo* get_entry(const char* pkgname, int n) {
641 unsigned int hash = compute_hash(pkgname, n);
642 return get_entry(hash_to_index(hash), hash, pkgname, n);
643 }
644
645 PackageInfo* new_entry(char* pkgname, int n) {
646 unsigned int hash = compute_hash(pkgname, n);
647 PackageInfo* pp;
648 pp = (PackageInfo*)BasicHashtable::new_entry(hash);
649 pp->set_pkgname(pkgname);
650 return pp;
651 }
652
653 void add_entry(PackageInfo* pp) {
654 int index = hash_to_index(pp->hash());
655 BasicHashtable::add_entry(index, pp);
656 }
657
658 void copy_pkgnames(const char** packages) {
659 int n = 0;
660 for (int i = 0; i < table_size(); ++i) {
661 for (PackageInfo* pp = bucket(i); pp != NULL; pp = pp->next()) {
662 packages[n++] = pp->pkgname();
663 }
664 }
665 assert(n == number_of_entries(), "just checking");
666 }
667
668 void copy_table(char** top, char* end, PackageHashtable* table);
669 };
670
671
672 void PackageHashtable::copy_table(char** top, char* end,
673 PackageHashtable* table) {
674 // Copy (relocate) the table to the shared space.
675 BasicHashtable::copy_table(top, end);
676
677 // Calculate the space needed for the package name strings.
678 int i;
679 int n = 0;
680 for (i = 0; i < table_size(); ++i) {
681 for (PackageInfo* pp = table->bucket(i);
682 pp != NULL;
683 pp = pp->next()) {
684 n += (int)(strlen(pp->pkgname()) + 1);
685 }
686 }
687 if (*top + n + sizeof(intptr_t) >= end) {
688 warning("\nThe shared miscellaneous data space is not large "
689 "enough to \npreload requested classes. Use "
690 "-XX:SharedMiscDataSize= to increase \nthe initial "
691 "size of the miscellaneous data space.\n");
692 exit(2);
693 }
694
695 // Copy the table data (the strings) to the shared space.
696 n = align_size_up(n, sizeof(HeapWord));
697 *(intptr_t*)(*top) = n;
698 *top += sizeof(intptr_t);
699
700 for (i = 0; i < table_size(); ++i) {
701 for (PackageInfo* pp = table->bucket(i);
702 pp != NULL;
703 pp = pp->next()) {
704 int n1 = (int)(strlen(pp->pkgname()) + 1);
705 pp->set_pkgname((char*)memcpy(*top, pp->pkgname(), n1));
706 *top += n1;
707 }
708 }
709 *top = (char*)align_size_up((intptr_t)*top, sizeof(HeapWord));
710 }
711
712
713 void ClassLoader::copy_package_info_buckets(char** top, char* end) {
714 _package_hash_table->copy_buckets(top, end);
715 }
716
717 void ClassLoader::copy_package_info_table(char** top, char* end) {
718 _package_hash_table->copy_table(top, end, _package_hash_table);
719 }
720
721
722 PackageInfo* ClassLoader::lookup_package(const char *pkgname) {
723 const char *cp = strrchr(pkgname, '/');
724 if (cp != NULL) {
725 // Package prefix found
726 int n = cp - pkgname + 1;
727 return _package_hash_table->get_entry(pkgname, n);
728 }
729 return NULL;
730 }
731
732
733 bool ClassLoader::add_package(const char *pkgname, int classpath_index, TRAPS) {
734 assert(pkgname != NULL, "just checking");
735 // Bootstrap loader no longer holds system loader lock obj serializing
736 // load_instance_class and thereby add_package
737 {
738 MutexLocker ml(PackageTable_lock, THREAD);
739 // First check for previously loaded entry
740 PackageInfo* pp = lookup_package(pkgname);
741 if (pp != NULL) {
742 // Existing entry found, check source of package
743 pp->set_index(classpath_index);
744 return true;
745 }
746
747 const char *cp = strrchr(pkgname, '/');
748 if (cp != NULL) {
749 // Package prefix found
750 int n = cp - pkgname + 1;
751
752 char* new_pkgname = NEW_C_HEAP_ARRAY(char, n + 1);
753 if (new_pkgname == NULL) {
754 return false;
755 }
756
757 memcpy(new_pkgname, pkgname, n);
758 new_pkgname[n] = '\0';
759 pp = _package_hash_table->new_entry(new_pkgname, n);
760 pp->set_index(classpath_index);
761
762 // Insert into hash table
763 _package_hash_table->add_entry(pp);
764 }
765 return true;
766 }
767 }
768
769
770 oop ClassLoader::get_system_package(const char* name, TRAPS) {
771 PackageInfo* pp;
772 {
773 MutexLocker ml(PackageTable_lock, THREAD);
774 pp = lookup_package(name);
775 }
776 if (pp == NULL) {
777 return NULL;
778 } else {
779 Handle p = java_lang_String::create_from_str(pp->filename(), THREAD);
780 return p();
781 }
782 }
783
784
785 objArrayOop ClassLoader::get_system_packages(TRAPS) {
786 ResourceMark rm(THREAD);
787 int nof_entries;
788 const char** packages;
789 {
790 MutexLocker ml(PackageTable_lock, THREAD);
791 // Allocate resource char* array containing package names
792 nof_entries = _package_hash_table->number_of_entries();
793 if ((packages = NEW_RESOURCE_ARRAY(const char*, nof_entries)) == NULL) {
794 return NULL;
795 }
796 _package_hash_table->copy_pkgnames(packages);
797 }
798 // Allocate objArray and fill with java.lang.String
799 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(),
800 nof_entries, CHECK_0);
801 objArrayHandle result(THREAD, r);
802 for (int i = 0; i < nof_entries; i++) {
803 Handle str = java_lang_String::create_from_str(packages[i], CHECK_0);
804 result->obj_at_put(i, str());
805 }
806
807 return result();
808 }
809
810
811 instanceKlassHandle ClassLoader::load_classfile(symbolHandle h_name, TRAPS) {
812 VTuneClassLoadMarker clm;
813 ResourceMark rm(THREAD);
814 EventMark m("loading class " INTPTR_FORMAT, (address)h_name());
815 ThreadProfilerMark tpm(ThreadProfilerMark::classLoaderRegion);
816
817 stringStream st;
818 // st.print() uses too much stack space while handling a StackOverflowError
819 // st.print("%s.class", h_name->as_utf8());
820 st.print_raw(h_name->as_utf8());
821 st.print_raw(".class");
822 char* name = st.as_string();
823
824 // Lookup stream for parsing .class file
825 ClassFileStream* stream = NULL;
826 int classpath_index = 0;
827 {
828 PerfTraceTime vmtimer(perf_accumulated_time());
829 ClassPathEntry* e = _first_entry;
830 while (e != NULL) {
831 stream = e->open_stream(name);
832 if (stream != NULL) {
833 break;
834 }
835 e = e->next();
836 ++classpath_index;
837 }
838 }
839
840 instanceKlassHandle h(THREAD, klassOop(NULL));
841 if (stream != NULL) {
842
843 // class file found, parse it
844 ClassFileParser parser(stream);
845 Handle class_loader;
846 Handle protection_domain;
847 symbolHandle parsed_name;
848 instanceKlassHandle result = parser.parseClassFile(h_name,
849 class_loader,
850 protection_domain,
851 parsed_name,
852 CHECK_(h));
853
854 // add to package table
855 if (add_package(name, classpath_index, THREAD)) {
856 h = result;
857 }
858 }
859
860 return h;
861 }
862
863
864 void ClassLoader::create_package_info_table(HashtableBucket *t, int length,
865 int number_of_entries) {
866 assert(_package_hash_table == NULL, "One package info table allowed.");
867 assert(length == package_hash_table_size * sizeof(HashtableBucket),
868 "bad shared package info size.");
869 _package_hash_table = new PackageHashtable(package_hash_table_size, t,
870 number_of_entries);
871 }
872
873
874 void ClassLoader::create_package_info_table() {
875 assert(_package_hash_table == NULL, "shouldn't have one yet");
876 _package_hash_table = new PackageHashtable(package_hash_table_size);
877 }
878
879
880 // Initialize the class loader's access to methods in libzip. Parse and
881 // process the boot classpath into a list ClassPathEntry objects. Once
882 // this list has been created, it must not change order (see class PackageInfo)
883 // it can be appended to and is by jvmti and the kernel vm.
884
885 void ClassLoader::initialize() {
886 assert(_package_hash_table == NULL, "should have been initialized by now.");
887 EXCEPTION_MARK;
888
889 if (UsePerfData) {
890 // jvmstat performance counters
891 NEWPERFTICKCOUNTER(_perf_accumulated_time, SUN_CLS, "time");
892 NEWPERFTICKCOUNTER(_perf_class_init_time, SUN_CLS, "classInitTime");
893 NEWPERFTICKCOUNTER(_perf_class_verify_time, SUN_CLS, "classVerifyTime");
894 NEWPERFTICKCOUNTER(_perf_class_link_time, SUN_CLS, "classLinkedTime");
895
896 NEWPERFEVENTCOUNTER(_perf_classes_inited, SUN_CLS, "initializedClasses");
897 NEWPERFEVENTCOUNTER(_perf_classes_linked, SUN_CLS, "linkedClasses");
898
899 // The following performance counters are added for measuring the impact
900 // of the bug fix of 6365597. They are mainly focused on finding out
901 // the behavior of system & user-defined classloader lock, whether
902 // ClassLoader.loadClass/findClass is being called synchronized or not.
903 // Also two additional counters are created to see whether 'UnsyncloadClass'
904 // flag is being set or not and how many times load_instance_class call
905 // fails with linkageError etc.
906 NEWPERFEVENTCOUNTER(_sync_systemLoaderLockContentionRate, SUN_CLS,
907 "systemLoaderLockContentionRate");
908 NEWPERFEVENTCOUNTER(_sync_nonSystemLoaderLockContentionRate, SUN_CLS,
909 "nonSystemLoaderLockContentionRate");
910 NEWPERFEVENTCOUNTER(_sync_JVMFindLoadedClassLockFreeCounter, SUN_CLS,
911 "jvmFindLoadedClassNoLockCalls");
912 NEWPERFEVENTCOUNTER(_sync_JVMDefineClassLockFreeCounter, SUN_CLS,
913 "jvmDefineClassNoLockCalls");
914
915 NEWPERFEVENTCOUNTER(_sync_JNIDefineClassLockFreeCounter, SUN_CLS,
916 "jniDefineClassNoLockCalls");
917
918 NEWPERFEVENTCOUNTER(_unsafe_defineClassCallCounter, SUN_CLS,
919 "unsafeDefineClassCalls");
920
921 NEWPERFEVENTCOUNTER(_isUnsyncloadClass, SUN_CLS, "isUnsyncloadClassSet");
922 NEWPERFEVENTCOUNTER(_load_instance_class_failCounter, SUN_CLS,
923 "loadInstanceClassFailRate");
924
925 // increment the isUnsyncloadClass counter if UnsyncloadClass is set.
926 if (UnsyncloadClass) {
927 _isUnsyncloadClass->inc();
928 }
929 }
930
931 // lookup zip library entry points
932 load_zip_library();
933 // initialize search path
934 setup_bootstrap_search_path();
935 if (LazyBootClassLoader) {
936 // set up meta index which makes boot classpath initialization lazier
937 setup_meta_index();
938 }
939 }
940
941
942 jlong ClassLoader::classloader_time_ms() {
943 return UsePerfData ?
944 Management::ticks_to_ms(_perf_accumulated_time->get_value()) : -1;
945 }
946
947 jlong ClassLoader::class_init_count() {
948 return UsePerfData ? _perf_classes_inited->get_value() : -1;
949 }
950
951 jlong ClassLoader::class_init_time_ms() {
952 return UsePerfData ?
953 Management::ticks_to_ms(_perf_class_init_time->get_value()) : -1;
954 }
955
956 jlong ClassLoader::class_verify_time_ms() {
957 return UsePerfData ?
958 Management::ticks_to_ms(_perf_class_verify_time->get_value()) : -1;
959 }
960
961 jlong ClassLoader::class_link_count() {
962 return UsePerfData ? _perf_classes_linked->get_value() : -1;
963 }
964
965 jlong ClassLoader::class_link_time_ms() {
966 return UsePerfData ?
967 Management::ticks_to_ms(_perf_class_link_time->get_value()) : -1;
968 }
969
970 int ClassLoader::compute_Object_vtable() {
971 // hardwired for JDK1.2 -- would need to duplicate class file parsing
972 // code to determine actual value from file
973 // Would be value '11' if finals were in vtable
974 int JDK_1_2_Object_vtable_size = 5;
975 return JDK_1_2_Object_vtable_size * vtableEntry::size();
976 }
977
978
979 void classLoader_init() {
980 ClassLoader::initialize();
981 }
982
983
984 bool ClassLoader::get_canonical_path(char* orig, char* out, int len) {
985 assert(orig != NULL && out != NULL && len > 0, "bad arguments");
986 if (CanonicalizeEntry != NULL) {
987 JNIEnv* env = JavaThread::current()->jni_environment();
988 if ((CanonicalizeEntry)(env, hpi::native_path(orig), out, len) < 0) {
989 return false;
990 }
991 } else {
992 // On JDK 1.2.2 the Canonicalize does not exist, so just do nothing
993 strncpy(out, orig, len);
994 out[len - 1] = '\0';
995 }
996 return true;
997 }
998
999 #ifndef PRODUCT
1000
1001 void ClassLoader::verify() {
1002 _package_hash_table->verify();
1003 }
1004
1005
1006 // CompileTheWorld
1007 //
1008 // Iterates over all class path entries and forces compilation of all methods
1009 // in all classes found. Currently, only zip/jar archives are searched.
1010 //
1011 // The classes are loaded by the Java level bootstrap class loader, and the
1012 // initializer is called. If DelayCompilationDuringStartup is true (default),
1013 // the interpreter will run the initialization code. Note that forcing
1014 // initialization in this way could potentially lead to initialization order
1015 // problems, in which case we could just force the initialization bit to be set.
1016
1017
1018 // We need to iterate over the contents of a zip/jar file, so we replicate the
1019 // jzcell and jzfile definitions from zip_util.h but rename jzfile to real_jzfile,
1020 // since jzfile already has a void* definition.
1021 //
1022 // Note that this is only used in debug mode.
1023 //
1024 // HotSpot integration note:
1025 // Matches zip_util.h 1.14 99/06/01 from jdk1.3 beta H build
1026
1027
1028 // JDK 1.3 version
1029 typedef struct real_jzentry13 { /* Zip file entry */
1030 char *name; /* entry name */
1031 jint time; /* modification time */
1032 jint size; /* size of uncompressed data */
1033 jint csize; /* size of compressed data (zero if uncompressed) */
1034 jint crc; /* crc of uncompressed data */
1035 char *comment; /* optional zip file comment */
1036 jbyte *extra; /* optional extra data */
1037 jint pos; /* position of LOC header (if negative) or data */
1038 } real_jzentry13;
1039
1040 typedef struct real_jzfile13 { /* Zip file */
1041 char *name; /* zip file name */
1042 jint refs; /* number of active references */
1043 jint fd; /* open file descriptor */
1044 void *lock; /* read lock */
1045 char *comment; /* zip file comment */
1046 char *msg; /* zip error message */
1047 void *entries; /* array of hash cells */
1048 jint total; /* total number of entries */
1049 unsigned short *table; /* Hash chain heads: indexes into entries */
1050 jint tablelen; /* number of hash eads */
1051 real_jzfile13 *next; /* next zip file in search list */
1052 jzentry *cache; /* we cache the most recently freed jzentry */
1053 /* Information on metadata names in META-INF directory */
1054 char **metanames; /* array of meta names (may have null names) */
1055 jint metacount; /* number of slots in metanames array */
1056 /* If there are any per-entry comments, they are in the comments array */
1057 char **comments;
1058 } real_jzfile13;
1059
1060 // JDK 1.2 version
1061 typedef struct real_jzentry12 { /* Zip file entry */
1062 char *name; /* entry name */
1063 jint time; /* modification time */
1064 jint size; /* size of uncompressed data */
1065 jint csize; /* size of compressed data (zero if uncompressed) */
1066 jint crc; /* crc of uncompressed data */
1067 char *comment; /* optional zip file comment */
1068 jbyte *extra; /* optional extra data */
1069 jint pos; /* position of LOC header (if negative) or data */
1070 struct real_jzentry12 *next; /* next entry in hash table */
1071 } real_jzentry12;
1072
1073 typedef struct real_jzfile12 { /* Zip file */
1074 char *name; /* zip file name */
1075 jint refs; /* number of active references */
1076 jint fd; /* open file descriptor */
1077 void *lock; /* read lock */
1078 char *comment; /* zip file comment */
1079 char *msg; /* zip error message */
1080 real_jzentry12 *entries; /* array of zip entries */
1081 jint total; /* total number of entries */
1082 real_jzentry12 **table; /* hash table of entries */
1083 jint tablelen; /* number of buckets */
1084 jzfile *next; /* next zip file in search list */
1085 } real_jzfile12;
1086
1087
1088 void ClassPathDirEntry::compile_the_world(Handle loader, TRAPS) {
1089 // For now we only compile all methods in all classes in zip/jar files
1090 tty->print_cr("CompileTheWorld : Skipped classes in %s", _dir);
1091 tty->cr();
1092 }
1093
1094
1095 bool ClassPathDirEntry::is_rt_jar() {
1096 return false;
1097 }
1098
1099 void ClassPathZipEntry::compile_the_world(Handle loader, TRAPS) {
1100 if (JDK_Version::is_jdk12x_version()) {
1101 compile_the_world12(loader, THREAD);
1102 } else {
1103 compile_the_world13(loader, THREAD);
1104 }
1105 if (HAS_PENDING_EXCEPTION) {
1106 if (PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())) {
1107 CLEAR_PENDING_EXCEPTION;
1108 tty->print_cr("\nCompileTheWorld : Ran out of memory\n");
1109 size_t used = Universe::heap()->permanent_used();
1110 size_t capacity = Universe::heap()->permanent_capacity();
1111 tty->print_cr("Permanent generation used %dK of %dK", used/K, capacity/K);
1112 tty->print_cr("Increase size by setting e.g. -XX:MaxPermSize=%dK\n", capacity*2/K);
1113 } else {
1114 tty->print_cr("\nCompileTheWorld : Unexpected exception occurred\n");
1115 }
1116 }
1117 }
1118
1119 // Version that works for JDK 1.3.x
1120 void ClassPathZipEntry::compile_the_world13(Handle loader, TRAPS) {
1121 real_jzfile13* zip = (real_jzfile13*) _zip;
1122 tty->print_cr("CompileTheWorld : Compiling all classes in %s", zip->name);
1123 tty->cr();
1124 // Iterate over all entries in zip file
1125 for (int n = 0; ; n++) {
1126 real_jzentry13 * ze = (real_jzentry13 *)((*GetNextEntry)(_zip, n));
1127 if (ze == NULL) break;
1128 ClassLoader::compile_the_world_in(ze->name, loader, CHECK);
1129 }
1130 }
1131
1132
1133 // Version that works for JDK 1.2.x
1134 void ClassPathZipEntry::compile_the_world12(Handle loader, TRAPS) {
1135 real_jzfile12* zip = (real_jzfile12*) _zip;
1136 tty->print_cr("CompileTheWorld : Compiling all classes in %s", zip->name);
1137 tty->cr();
1138 // Iterate over all entries in zip file
1139 for (int n = 0; ; n++) {
1140 real_jzentry12 * ze = (real_jzentry12 *)((*GetNextEntry)(_zip, n));
1141 if (ze == NULL) break;
1142 ClassLoader::compile_the_world_in(ze->name, loader, CHECK);
1143 }
1144 }
1145
1146 bool ClassPathZipEntry::is_rt_jar() {
1147 if (JDK_Version::is_jdk12x_version()) {
1148 return is_rt_jar12();
1149 } else {
1150 return is_rt_jar13();
1151 }
1152 }
1153
1154 // JDK 1.3 version
1155 bool ClassPathZipEntry::is_rt_jar13() {
1156 real_jzfile13* zip = (real_jzfile13*) _zip;
1157 int len = (int)strlen(zip->name);
1158 // Check whether zip name ends in "rt.jar"
1159 // This will match other archives named rt.jar as well, but this is
1160 // only used for debugging.
1161 return (len >= 6) && (strcasecmp(zip->name + len - 6, "rt.jar") == 0);
1162 }
1163
1164 // JDK 1.2 version
1165 bool ClassPathZipEntry::is_rt_jar12() {
1166 real_jzfile12* zip = (real_jzfile12*) _zip;
1167 int len = (int)strlen(zip->name);
1168 // Check whether zip name ends in "rt.jar"
1169 // This will match other archives named rt.jar as well, but this is
1170 // only used for debugging.
1171 return (len >= 6) && (strcasecmp(zip->name + len - 6, "rt.jar") == 0);
1172 }
1173
1174 void LazyClassPathEntry::compile_the_world(Handle loader, TRAPS) {
1175 resolve_entry()->compile_the_world(loader, CHECK);
1176 }
1177
1178 bool LazyClassPathEntry::is_rt_jar() {
1179 return resolve_entry()->is_rt_jar();
1180 }
1181
1182 void ClassLoader::compile_the_world() {
1183 EXCEPTION_MARK;
1184 HandleMark hm(THREAD);
1185 ResourceMark rm(THREAD);
1186 // Make sure we don't run with background compilation
1187 BackgroundCompilation = false;
1188 // Find bootstrap loader
1189 Handle system_class_loader (THREAD, SystemDictionary::java_system_loader());
1190 // Iterate over all bootstrap class path entries
1191 ClassPathEntry* e = _first_entry;
1192 while (e != NULL) {
1193 // We stop at rt.jar, unless it is the first bootstrap path entry
1194 if (e->is_rt_jar() && e != _first_entry) break;
1195 e->compile_the_world(system_class_loader, CATCH);
1196 e = e->next();
1197 }
1198 tty->print_cr("CompileTheWorld : Done");
1199 {
1200 // Print statistics as if before normal exit:
1201 extern void print_statistics();
1202 print_statistics();
1203 }
1204 vm_exit(0);
1205 }
1206
1207 int ClassLoader::_compile_the_world_counter = 0;
1208
1209 void ClassLoader::compile_the_world_in(char* name, Handle loader, TRAPS) {
1210 int len = (int)strlen(name);
1211 if (len > 6 && strcmp(".class", name + len - 6) == 0) {
1212 // We have a .class file
1213 char buffer[2048];
1214 strncpy(buffer, name, len - 6);
1215 buffer[len-6] = 0;
1216 // If the file has a period after removing .class, it's not really a
1217 // valid class file. The class loader will check everything else.
1218 if (strchr(buffer, '.') == NULL) {
1219 _compile_the_world_counter++;
1220 if (_compile_the_world_counter >= CompileTheWorldStartAt && _compile_the_world_counter <= CompileTheWorldStopAt) {
1221 // Construct name without extension
1222 symbolHandle sym = oopFactory::new_symbol_handle(buffer, CHECK);
1223 // Use loader to load and initialize class
1224 klassOop ik = SystemDictionary::resolve_or_null(sym, loader, Handle(), THREAD);
1225 instanceKlassHandle k (THREAD, ik);
1226 if (k.not_null() && !HAS_PENDING_EXCEPTION) {
1227 k->initialize(THREAD);
1228 }
1229 bool exception_occurred = HAS_PENDING_EXCEPTION;
1230 CLEAR_PENDING_EXCEPTION;
1231 if (k.is_null() || (exception_occurred && !CompileTheWorldIgnoreInitErrors)) {
1232 // If something went wrong (e.g. ExceptionInInitializerError) we skip this class
1233 tty->print_cr("CompileTheWorld (%d) : Skipping %s", _compile_the_world_counter, buffer);
1234 } else {
1235 tty->print_cr("CompileTheWorld (%d) : %s", _compile_the_world_counter, buffer);
1236 // Preload all classes to get around uncommon traps
1237 if (CompileTheWorldPreloadClasses) {
1238 constantPoolKlass::preload_and_initialize_all_classes(k->constants(), THREAD);
1239 if (HAS_PENDING_EXCEPTION) {
1240 // If something went wrong in preloading we just ignore it
1241 CLEAR_PENDING_EXCEPTION;
1242 tty->print_cr("Preloading failed for (%d) %s", _compile_the_world_counter, buffer);
1243 }
1244 }
1245 // Iterate over all methods in class
1246 for (int n = 0; n < k->methods()->length(); n++) {
1247 methodHandle m (THREAD, methodOop(k->methods()->obj_at(n)));
1248 if (CompilationPolicy::canBeCompiled(m)) {
1249 // Force compilation
1250 CompileBroker::compile_method(m, InvocationEntryBci,
1251 methodHandle(), 0, "CTW", THREAD);
1252 if (HAS_PENDING_EXCEPTION) {
1253 CLEAR_PENDING_EXCEPTION;
1254 tty->print_cr("CompileTheWorld (%d) : Skipping method: %s", _compile_the_world_counter, m->name()->as_C_string());
1255 }
1256 if (TieredCompilation) {
1257 // Clobber the first compile and force second tier compilation
1258 m->clear_code();
1259 CompileBroker::compile_method(m, InvocationEntryBci,
1260 methodHandle(), 0, "CTW", THREAD);
1261 if (HAS_PENDING_EXCEPTION) {
1262 CLEAR_PENDING_EXCEPTION;
1263 tty->print_cr("CompileTheWorld (%d) : Skipping method: %s", _compile_the_world_counter, m->name()->as_C_string());
1264 }
1265 }
1266 }
1267 }
1268 }
1269 }
1270 }
1271 }
1272 }
1273
1274 #endif //PRODUCT