1 /*
2 * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26 #include "classfile/classFileParser.hpp"
27 #include "classfile/classFileStream.hpp"
28 #include "classfile/classLoader.hpp"
29 #include "classfile/classLoaderExt.hpp"
30 #include "classfile/classLoaderData.inline.hpp"
31 #include "classfile/imageFile.hpp"
32 #include "classfile/javaClasses.hpp"
33 #include "classfile/systemDictionary.hpp"
34 #include "classfile/vmSymbols.hpp"
35 #include "compiler/compileBroker.hpp"
36 #include "gc_interface/collectedHeap.inline.hpp"
37 #include "interpreter/bytecodeStream.hpp"
38 #include "interpreter/oopMapCache.hpp"
39 #include "memory/allocation.inline.hpp"
40 #include "memory/filemap.hpp"
41 #include "memory/generation.hpp"
42 #include "memory/oopFactory.hpp"
43 #include "memory/universe.inline.hpp"
44 #include "oops/instanceKlass.hpp"
45 #include "oops/instanceRefKlass.hpp"
46 #include "oops/oop.inline.hpp"
47 #include "oops/symbol.hpp"
48 #include "prims/jvm_misc.hpp"
49 #include "runtime/arguments.hpp"
50 #include "runtime/compilationPolicy.hpp"
51 #include "runtime/fprofiler.hpp"
52 #include "runtime/handles.hpp"
53 #include "runtime/handles.inline.hpp"
54 #include "runtime/init.hpp"
55 #include "runtime/interfaceSupport.hpp"
56 #include "runtime/java.hpp"
57 #include "runtime/javaCalls.hpp"
58 #include "runtime/os.hpp"
59 #include "runtime/threadCritical.hpp"
60 #include "runtime/timer.hpp"
61 #include "services/management.hpp"
62 #include "services/threadService.hpp"
63 #include "utilities/events.hpp"
64 #include "utilities/hashtable.inline.hpp"
65 #include "utilities/macros.hpp"
66 #if INCLUDE_CDS
67 #include "classfile/sharedPathsMiscInfo.hpp"
68 #include "classfile/sharedClassUtil.hpp"
69 #endif
70
71
72 // Entry points in zip.dll for loading zip/jar file entries and image file entries
73
74 typedef void * * (JNICALL *ZipOpen_t)(const char *name, char **pmsg);
75 typedef void (JNICALL *ZipClose_t)(jzfile *zip);
76 typedef jzentry* (JNICALL *FindEntry_t)(jzfile *zip, const char *name, jint *sizeP, jint *nameLen);
77 typedef jboolean (JNICALL *ReadEntry_t)(jzfile *zip, jzentry *entry, unsigned char *buf, char *namebuf);
78 typedef jboolean (JNICALL *ReadMappedEntry_t)(jzfile *zip, jzentry *entry, unsigned char **buf, char *namebuf);
79 typedef jzentry* (JNICALL *GetNextEntry_t)(jzfile *zip, jint n);
80 typedef jboolean (JNICALL *ZipInflateFully_t)(void *inBuf, jlong inLen, void *outBuf, jlong outLen, char **pmsg);
81 typedef jint (JNICALL *Crc32_t)(jint crc, const jbyte *buf, jint len);
82
83 static ZipOpen_t ZipOpen = NULL;
84 static ZipClose_t ZipClose = NULL;
85 static FindEntry_t FindEntry = NULL;
86 static ReadEntry_t ReadEntry = NULL;
87 static ReadMappedEntry_t ReadMappedEntry = NULL;
88 static GetNextEntry_t GetNextEntry = NULL;
89 static canonicalize_fn_t CanonicalizeEntry = NULL;
90 static ZipInflateFully_t ZipInflateFully = NULL;
91 static Crc32_t Crc32 = NULL;
92
93 // Globals
94
95 PerfCounter* ClassLoader::_perf_accumulated_time = NULL;
96 PerfCounter* ClassLoader::_perf_classes_inited = NULL;
97 PerfCounter* ClassLoader::_perf_class_init_time = NULL;
98 PerfCounter* ClassLoader::_perf_class_init_selftime = NULL;
99 PerfCounter* ClassLoader::_perf_classes_verified = NULL;
100 PerfCounter* ClassLoader::_perf_class_verify_time = NULL;
101 PerfCounter* ClassLoader::_perf_class_verify_selftime = NULL;
102 PerfCounter* ClassLoader::_perf_classes_linked = NULL;
103 PerfCounter* ClassLoader::_perf_class_link_time = NULL;
104 PerfCounter* ClassLoader::_perf_class_link_selftime = NULL;
105 PerfCounter* ClassLoader::_perf_class_parse_time = NULL;
106 PerfCounter* ClassLoader::_perf_class_parse_selftime = NULL;
107 PerfCounter* ClassLoader::_perf_sys_class_lookup_time = NULL;
108 PerfCounter* ClassLoader::_perf_shared_classload_time = NULL;
109 PerfCounter* ClassLoader::_perf_sys_classload_time = NULL;
110 PerfCounter* ClassLoader::_perf_app_classload_time = NULL;
111 PerfCounter* ClassLoader::_perf_app_classload_selftime = NULL;
112 PerfCounter* ClassLoader::_perf_app_classload_count = NULL;
113 PerfCounter* ClassLoader::_perf_define_appclasses = NULL;
114 PerfCounter* ClassLoader::_perf_define_appclass_time = NULL;
115 PerfCounter* ClassLoader::_perf_define_appclass_selftime = NULL;
116 PerfCounter* ClassLoader::_perf_app_classfile_bytes_read = NULL;
117 PerfCounter* ClassLoader::_perf_sys_classfile_bytes_read = NULL;
118 PerfCounter* ClassLoader::_sync_systemLoaderLockContentionRate = NULL;
119 PerfCounter* ClassLoader::_sync_nonSystemLoaderLockContentionRate = NULL;
120 PerfCounter* ClassLoader::_sync_JVMFindLoadedClassLockFreeCounter = NULL;
121 PerfCounter* ClassLoader::_sync_JVMDefineClassLockFreeCounter = NULL;
122 PerfCounter* ClassLoader::_sync_JNIDefineClassLockFreeCounter = NULL;
123 PerfCounter* ClassLoader::_unsafe_defineClassCallCounter = NULL;
124 PerfCounter* ClassLoader::_isUnsyncloadClass = NULL;
125 PerfCounter* ClassLoader::_load_instance_class_failCounter = NULL;
126
127 ClassPathEntry* ClassLoader::_first_entry = NULL;
128 ClassPathEntry* ClassLoader::_last_entry = NULL;
129 int ClassLoader::_num_entries = 0;
130 PackageHashtable* ClassLoader::_package_hash_table = NULL;
131
132 #if INCLUDE_CDS
133 SharedPathsMiscInfo* ClassLoader::_shared_paths_misc_info = NULL;
134 #endif
135 // helper routines
136 bool string_starts_with(const char* str, const char* str_to_find) {
137 size_t str_len = strlen(str);
138 size_t str_to_find_len = strlen(str_to_find);
139 if (str_to_find_len > str_len) {
140 return false;
141 }
142 return (strncmp(str, str_to_find, str_to_find_len) == 0);
143 }
144
145 bool string_ends_with(const char* str, const char* str_to_find) {
146 size_t str_len = strlen(str);
147 size_t str_to_find_len = strlen(str_to_find);
148 if (str_to_find_len > str_len) {
149 return false;
150 }
151 return (strncmp(str + (str_len - str_to_find_len), str_to_find, str_to_find_len) == 0);
152 }
153
154
155 ClassPathEntry::ClassPathEntry() {
156 set_next(NULL);
157 }
158
159
160 ClassPathDirEntry::ClassPathDirEntry(const char* dir) : ClassPathEntry() {
161 char* copy = NEW_C_HEAP_ARRAY(char, strlen(dir)+1, mtClass);
162 strcpy(copy, dir);
163 _dir = copy;
164 }
165
166
167 ClassFileStream* ClassPathDirEntry::open_stream(const char* name, TRAPS) {
168 // construct full path name
169 char path[JVM_MAXPATHLEN];
170 if (jio_snprintf(path, sizeof(path), "%s%s%s", _dir, os::file_separator(), name) == -1) {
171 return NULL;
172 }
173 // check if file exists
174 struct stat st;
175 if (os::stat(path, &st) == 0) {
176 #if INCLUDE_CDS
177 if (DumpSharedSpaces) {
178 // We have already check in ClassLoader::check_shared_classpath() that the directory is empty, so
179 // we should never find a file underneath it -- unless user has added a new file while we are running
180 // the dump, in which case let's quit!
181 ShouldNotReachHere();
182 }
183 #endif
184 // found file, open it
185 int file_handle = os::open(path, 0, 0);
186 if (file_handle != -1) {
187 // read contents into resource array
188 u1* buffer = NEW_RESOURCE_ARRAY(u1, st.st_size);
189 size_t num_read = os::read(file_handle, (char*) buffer, st.st_size);
190 // close file
191 os::close(file_handle);
192 // construct ClassFileStream
193 if (num_read == (size_t)st.st_size) {
194 if (UsePerfData) {
195 ClassLoader::perf_sys_classfile_bytes_read()->inc(num_read);
196 }
197 return new ClassFileStream(buffer, st.st_size, _dir); // Resource allocated
198 }
199 }
200 }
201 return NULL;
202 }
203
204
205 ClassPathZipEntry::ClassPathZipEntry(jzfile* zip, const char* zip_name) : ClassPathEntry() {
206 _zip = zip;
207 char *copy = NEW_C_HEAP_ARRAY(char, strlen(zip_name)+1, mtClass);
208 strcpy(copy, zip_name);
209 _zip_name = copy;
210 }
211
212 ClassPathZipEntry::~ClassPathZipEntry() {
213 if (ZipClose != NULL) {
214 (*ZipClose)(_zip);
215 }
216 FREE_C_HEAP_ARRAY(char, _zip_name);
217 }
218
219 u1* ClassPathZipEntry::open_entry(const char* name, jint* filesize, bool nul_terminate, TRAPS) {
220 // enable call to C land
221 JavaThread* thread = JavaThread::current();
222 ThreadToNativeFromVM ttn(thread);
223 // check whether zip archive contains name
224 jint name_len;
225 jzentry* entry = (*FindEntry)(_zip, name, filesize, &name_len);
226 if (entry == NULL) return NULL;
227 u1* buffer;
228 char name_buf[128];
229 char* filename;
230 if (name_len < 128) {
231 filename = name_buf;
232 } else {
233 filename = NEW_RESOURCE_ARRAY(char, name_len + 1);
234 }
235
236 // file found, get pointer to the entry in mmapped jar file.
237 if (ReadMappedEntry == NULL ||
238 !(*ReadMappedEntry)(_zip, entry, &buffer, filename)) {
239 // mmapped access not available, perhaps due to compression,
240 // read contents into resource array
241 int size = (*filesize) + ((nul_terminate) ? 1 : 0);
242 buffer = NEW_RESOURCE_ARRAY(u1, size);
243 if (!(*ReadEntry)(_zip, entry, buffer, filename)) return NULL;
244 }
245
246 // return result
247 if (nul_terminate) {
248 buffer[*filesize] = 0;
249 }
250 return buffer;
251 }
252
253 ClassFileStream* ClassPathZipEntry::open_stream(const char* name, TRAPS) {
254 jint filesize;
255 u1* buffer = open_entry(name, &filesize, false, CHECK_NULL);
256 if (buffer == NULL) {
257 return NULL;
258 }
259 if (UsePerfData) {
260 ClassLoader::perf_sys_classfile_bytes_read()->inc(filesize);
261 }
262 return new ClassFileStream(buffer, filesize, _zip_name); // Resource allocated
263 }
264
265 // invoke function for each entry in the zip file
266 void ClassPathZipEntry::contents_do(void f(const char* name, void* context), void* context) {
267 JavaThread* thread = JavaThread::current();
268 HandleMark handle_mark(thread);
269 ThreadToNativeFromVM ttn(thread);
270 for (int n = 0; ; n++) {
271 jzentry * ze = ((*GetNextEntry)(_zip, n));
272 if (ze == NULL) break;
273 (*f)(ze->name, context);
274 }
275 }
276
277 ClassPathImageEntry::ClassPathImageEntry(char* name) : ClassPathEntry(), _image(new ImageFile(name)) {
278 bool opened = _image->open();
279 if (!opened) {
280 _image = NULL;
281 }
282 }
283
284 ClassPathImageEntry::~ClassPathImageEntry() {
285 if (_image) {
286 _image->close();
287 _image = NULL;
288 }
289 }
290
291 const char* ClassPathImageEntry::name() {
292 return _image ? _image->name() : "";
293 }
294
295 ClassFileStream* ClassPathImageEntry::open_stream(const char* name, TRAPS) {
296 u1* buffer;
297 u8 size;
298 _image->get_resource(name, buffer, size);
299
300 if (buffer) {
301 if (UsePerfData) {
302 ClassLoader::perf_sys_classfile_bytes_read()->inc(size);
303 }
304 return new ClassFileStream(buffer, (int)size, (char*)name); // Resource allocated
305 }
306
307 return NULL;
308 }
309
310 #ifndef PRODUCT
311 void ClassPathImageEntry::compile_the_world(Handle loader, TRAPS) {
312 tty->print_cr("CompileTheWorld : Compiling all classes in %s", name());
313 tty->cr();
314 const ImageStrings strings = _image->get_strings();
315 // Retrieve each path component string.
316 u4 count = _image->get_location_count();
317 for (u4 i = 0; i < count; i++) {
318 u1* location_data = _image->get_location_data(i);
319
320 if (location_data) {
321 ImageLocation location(location_data);
322 const char* parent = location.get_attribute(ImageLocation::ATTRIBUTE_PARENT, strings);
323 const char* base = location.get_attribute(ImageLocation::ATTRIBUTE_BASE, strings);
324 const char* extension = location.get_attribute(ImageLocation::ATTRIBUTE_EXTENSION, strings);
325 assert((strlen(parent) + strlen(base) + strlen(extension)) < JVM_MAXPATHLEN, "path exceeds buffer");
326 char path[JVM_MAXPATHLEN];
327 strcpy(path, parent);
328 strcat(path, base);
329 strcat(path, extension);
330 ClassLoader::compile_the_world_in(path, loader, CHECK);
331 }
332 }
333 if (HAS_PENDING_EXCEPTION) {
334 if (PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())) {
335 CLEAR_PENDING_EXCEPTION;
336 tty->print_cr("\nCompileTheWorld : Ran out of memory\n");
337 tty->print_cr("Increase class metadata storage if a limit was set");
338 } else {
339 tty->print_cr("\nCompileTheWorld : Unexpected exception occurred\n");
340 }
341 }
342 }
343
344 bool ClassPathImageEntry::is_jrt() {
345 return string_ends_with(name(), "bootmodules.jimage");
346 }
347 #endif
348
349 #if INCLUDE_CDS
350 void ClassLoader::exit_with_path_failure(const char* error, const char* message) {
351 assert(DumpSharedSpaces, "only called at dump time");
352 tty->print_cr("Hint: enable -XX:+TraceClassPaths to diagnose the failure");
353 vm_exit_during_initialization(error, message);
354 }
355 #endif
356
357 void ClassLoader::trace_class_path(const char* msg, const char* name) {
358 if (!TraceClassPaths) {
359 return;
360 }
361
362 if (msg) {
363 tty->print("%s", msg);
364 }
365 if (name) {
366 if (strlen(name) < 256) {
367 tty->print("%s", name);
368 } else {
369 // For very long paths, we need to print each character separately,
370 // as print_cr() has a length limit
371 while (name[0] != '\0') {
372 tty->print("%c", name[0]);
373 name++;
374 }
375 }
376 }
377 if (msg && msg[0] == '[') {
378 tty->print_cr("]");
379 } else {
380 tty->cr();
381 }
382 }
383
384 #if INCLUDE_CDS
385 void ClassLoader::check_shared_classpath(const char *path) {
386 if (strcmp(path, "") == 0) {
387 exit_with_path_failure("Cannot have empty path in archived classpaths", NULL);
388 }
389
390 struct stat st;
391 if (os::stat(path, &st) == 0) {
392 if ((st.st_mode & S_IFREG) != S_IFREG) { // is directory
393 if (!os::dir_is_empty(path)) {
394 tty->print_cr("Error: non-empty directory '%s'", path);
395 exit_with_path_failure("CDS allows only empty directories in archived classpaths", NULL);
396 }
397 }
398 }
399 }
400 #endif
401
402 void ClassLoader::setup_bootstrap_search_path() {
403 assert(_first_entry == NULL, "should not setup bootstrap class search path twice");
404 const char* sys_class_path = Arguments::get_sysclasspath();
405 if (PrintSharedArchiveAndExit) {
406 // Don't print sys_class_path - this is the bootcp of this current VM process, not necessarily
407 // the same as the bootcp of the shared archive.
408 } else {
409 trace_class_path("[Bootstrap loader class path=", sys_class_path);
410 }
411 #if INCLUDE_CDS
412 if (DumpSharedSpaces) {
413 _shared_paths_misc_info->add_boot_classpath(sys_class_path);
414 }
415 #endif
416 setup_search_path(sys_class_path);
417 }
418
419 #if INCLUDE_CDS
420 int ClassLoader::get_shared_paths_misc_info_size() {
421 return _shared_paths_misc_info->get_used_bytes();
422 }
423
424 void* ClassLoader::get_shared_paths_misc_info() {
425 return _shared_paths_misc_info->buffer();
426 }
427
428 bool ClassLoader::check_shared_paths_misc_info(void *buf, int size) {
429 SharedPathsMiscInfo* checker = SharedClassUtil::allocate_shared_paths_misc_info((char*)buf, size);
430 bool result = checker->check();
431 delete checker;
432 return result;
433 }
434 #endif
435
436 void ClassLoader::setup_search_path(const char *class_path) {
437 int offset = 0;
438 int len = (int)strlen(class_path);
439 int end = 0;
440
441 // Iterate over class path entries
442 for (int start = 0; start < len; start = end) {
443 while (class_path[end] && class_path[end] != os::path_separator()[0]) {
444 end++;
445 }
446 EXCEPTION_MARK;
447 ResourceMark rm(THREAD);
448 char* path = NEW_RESOURCE_ARRAY(char, end - start + 1);
449 strncpy(path, &class_path[start], end - start);
450 path[end - start] = '\0';
451 update_class_path_entry_list(path, false);
452 #if INCLUDE_CDS
453 if (DumpSharedSpaces) {
454 check_shared_classpath(path);
455 }
456 #endif
457 while (class_path[end] == os::path_separator()[0]) {
458 end++;
459 }
460 }
461 }
462
463 ClassPathEntry* ClassLoader::create_class_path_entry(const char *path, const struct stat* st,
464 bool throw_exception, TRAPS) {
465 JavaThread* thread = JavaThread::current();
466 ClassPathEntry* new_entry = NULL;
467 if ((st->st_mode & S_IFREG) == S_IFREG) {
468 // Regular file, should be a zip or image file
469 // Canonicalized filename
470 char canonical_path[JVM_MAXPATHLEN];
471 if (!get_canonical_path(path, canonical_path, JVM_MAXPATHLEN)) {
472 // This matches the classic VM
473 if (throw_exception) {
474 THROW_MSG_(vmSymbols::java_io_IOException(), "Bad pathname", NULL);
475 } else {
476 return NULL;
477 }
478 }
479 // TODO - add proper criteria for selecting image file
480 ClassPathImageEntry* entry = new ClassPathImageEntry(canonical_path);
481 if (entry->is_open()) {
482 new_entry = entry;
483 } else {
484 char* error_msg = NULL;
485 jzfile* zip;
486 {
487 // enable call to C land
488 ThreadToNativeFromVM ttn(thread);
489 HandleMark hm(thread);
490 zip = (*ZipOpen)(canonical_path, &error_msg);
491 }
492 if (zip != NULL && error_msg == NULL) {
493 new_entry = new ClassPathZipEntry(zip, path);
494 } else {
495 ResourceMark rm(thread);
496 char *msg;
497 if (error_msg == NULL) {
498 msg = NEW_RESOURCE_ARRAY(char, strlen(path) + 128); ;
499 jio_snprintf(msg, strlen(path) + 127, "error in opening JAR file %s", path);
500 } else {
501 int len = (int)(strlen(path) + strlen(error_msg) + 128);
502 msg = NEW_RESOURCE_ARRAY(char, len); ;
503 jio_snprintf(msg, len - 1, "error in opening JAR file <%s> %s", error_msg, path);
504 }
505 if (throw_exception) {
506 THROW_MSG_(vmSymbols::java_lang_ClassNotFoundException(), msg, NULL);
507 } else {
508 return NULL;
509 }
510 }
511 }
512 if (TraceClassLoading || TraceClassPaths) {
513 tty->print_cr("[Opened %s]", path);
514 }
515 } else {
516 // Directory
517 new_entry = new ClassPathDirEntry(path);
518 if (TraceClassLoading) {
519 tty->print_cr("[Path %s]", path);
520 }
521 }
522 return new_entry;
523 }
524
525
526 // Create a class path zip entry for a given path (return NULL if not found
527 // or zip/JAR file cannot be opened)
528 ClassPathZipEntry* ClassLoader::create_class_path_zip_entry(const char *path) {
529 // check for a regular file
530 struct stat st;
531 if (os::stat(path, &st) == 0) {
532 if ((st.st_mode & S_IFREG) == S_IFREG) {
533 char canonical_path[JVM_MAXPATHLEN];
534 if (get_canonical_path(path, canonical_path, JVM_MAXPATHLEN)) {
535 char* error_msg = NULL;
536 jzfile* zip;
537 {
538 // enable call to C land
539 JavaThread* thread = JavaThread::current();
540 ThreadToNativeFromVM ttn(thread);
541 HandleMark hm(thread);
542 zip = (*ZipOpen)(canonical_path, &error_msg);
543 }
544 if (zip != NULL && error_msg == NULL) {
545 // create using canonical path
546 return new ClassPathZipEntry(zip, canonical_path);
547 }
548 }
549 }
550 }
551 return NULL;
552 }
553
554 // returns true if entry already on class path
555 bool ClassLoader::contains_entry(ClassPathEntry *entry) {
556 ClassPathEntry* e = _first_entry;
557 while (e != NULL) {
558 // assume zip entries have been canonicalized
559 if (strcmp(entry->name(), e->name()) == 0) {
560 return true;
561 }
562 e = e->next();
563 }
564 return false;
565 }
566
567 void ClassLoader::add_to_list(ClassPathEntry *new_entry) {
568 if (new_entry != NULL) {
569 if (_last_entry == NULL) {
570 _first_entry = _last_entry = new_entry;
571 } else {
572 _last_entry->set_next(new_entry);
573 _last_entry = new_entry;
574 }
575 }
576 _num_entries ++;
577 }
578
579 // Returns true IFF the file/dir exists and the entry was successfully created.
580 bool ClassLoader::update_class_path_entry_list(const char *path,
581 bool check_for_duplicates,
582 bool throw_exception) {
583 struct stat st;
584 if (os::stat(path, &st) == 0) {
585 // File or directory found
586 ClassPathEntry* new_entry = NULL;
587 Thread* THREAD = Thread::current();
588 new_entry = create_class_path_entry(path, &st, throw_exception, CHECK_(false));
589 if (new_entry == NULL) {
590 return false;
591 }
592 // The kernel VM adds dynamically to the end of the classloader path and
593 // doesn't reorder the bootclasspath which would break java.lang.Package
594 // (see PackageInfo).
595 // Add new entry to linked list
596 if (!check_for_duplicates || !contains_entry(new_entry)) {
597 ClassLoaderExt::add_class_path_entry(path, check_for_duplicates, new_entry);
598 }
599 return true;
600 } else {
601 #if INCLUDE_CDS
602 if (DumpSharedSpaces) {
603 _shared_paths_misc_info->add_nonexist_path(path);
604 }
605 #endif
606 return false;
607 }
608 }
609
610 void ClassLoader::print_bootclasspath() {
611 ClassPathEntry* e = _first_entry;
612 tty->print("[bootclasspath= ");
613 while (e != NULL) {
614 tty->print("%s ;", e->name());
615 e = e->next();
616 }
617 tty->print_cr("]");
618 }
619
620 void ClassLoader::load_zip_library() {
621 assert(ZipOpen == NULL, "should not load zip library twice");
622 // First make sure native library is loaded
623 os::native_java_library();
624 // Load zip library
625 char path[JVM_MAXPATHLEN];
626 char ebuf[1024];
627 void* handle = NULL;
628 if (os::dll_build_name(path, sizeof(path), Arguments::get_dll_dir(), "zip")) {
629 handle = os::dll_load(path, ebuf, sizeof ebuf);
630 }
631 if (handle == NULL) {
632 vm_exit_during_initialization("Unable to load ZIP library", path);
633 }
634 // Lookup zip entry points
635 ZipOpen = CAST_TO_FN_PTR(ZipOpen_t, os::dll_lookup(handle, "ZIP_Open"));
636 ZipClose = CAST_TO_FN_PTR(ZipClose_t, os::dll_lookup(handle, "ZIP_Close"));
637 FindEntry = CAST_TO_FN_PTR(FindEntry_t, os::dll_lookup(handle, "ZIP_FindEntry"));
638 ReadEntry = CAST_TO_FN_PTR(ReadEntry_t, os::dll_lookup(handle, "ZIP_ReadEntry"));
639 ReadMappedEntry = CAST_TO_FN_PTR(ReadMappedEntry_t, os::dll_lookup(handle, "ZIP_ReadMappedEntry"));
640 GetNextEntry = CAST_TO_FN_PTR(GetNextEntry_t, os::dll_lookup(handle, "ZIP_GetNextEntry"));
641 ZipInflateFully = CAST_TO_FN_PTR(ZipInflateFully_t, os::dll_lookup(handle, "ZIP_InflateFully"));
642 Crc32 = CAST_TO_FN_PTR(Crc32_t, os::dll_lookup(handle, "ZIP_CRC32"));
643
644 // ZIP_Close is not exported on Windows in JDK5.0 so don't abort if ZIP_Close is NULL
645 if (ZipOpen == NULL || FindEntry == NULL || ReadEntry == NULL ||
646 GetNextEntry == NULL || Crc32 == NULL) {
647 vm_exit_during_initialization("Corrupted ZIP library", path);
648 }
649
650 if (ZipInflateFully == NULL) {
651 vm_exit_during_initialization("Corrupted ZIP library ZIP_InflateFully missing", path);
652 }
653
654 // Lookup canonicalize entry in libjava.dll
655 void *javalib_handle = os::native_java_library();
656 CanonicalizeEntry = CAST_TO_FN_PTR(canonicalize_fn_t, os::dll_lookup(javalib_handle, "Canonicalize"));
657 // This lookup only works on 1.3. Do not check for non-null here
658 }
659
660 jboolean ClassLoader::decompress(void *in, u8 inSize, void *out, u8 outSize, char **pmsg) {
661 return (*ZipInflateFully)(in, inSize, out, outSize, pmsg);
662 }
663
664 int ClassLoader::crc32(int crc, const char* buf, int len) {
665 assert(Crc32 != NULL, "ZIP_CRC32 is not found");
666 return (*Crc32)(crc, (const jbyte*)buf, len);
667 }
668
669 // PackageInfo data exists in order to support the java.lang.Package
670 // class. A Package object provides information about a java package
671 // (version, vendor, etc.) which originates in the manifest of the jar
672 // file supplying the package. For application classes, the ClassLoader
673 // object takes care of this.
674
675 // For system (boot) classes, the Java code in the Package class needs
676 // to be able to identify which source jar file contained the boot
677 // class, so that it can extract the manifest from it. This table
678 // identifies java packages with jar files in the boot classpath.
679
680 // Because the boot classpath cannot change, the classpath index is
681 // sufficient to identify the source jar file or directory. (Since
682 // directories have no manifests, the directory name is not required,
683 // but is available.)
684
685 // When using sharing -- the pathnames of entries in the boot classpath
686 // may not be the same at runtime as they were when the archive was
687 // created (NFS, Samba, etc.). The actual files and directories named
688 // in the classpath must be the same files, in the same order, even
689 // though the exact name is not the same.
690
691 class PackageInfo: public BasicHashtableEntry<mtClass> {
692 public:
693 const char* _pkgname; // Package name
694 int _classpath_index; // Index of directory or JAR file loaded from
695
696 PackageInfo* next() {
697 return (PackageInfo*)BasicHashtableEntry<mtClass>::next();
698 }
699
700 const char* pkgname() { return _pkgname; }
701 void set_pkgname(char* pkgname) { _pkgname = pkgname; }
702
703 const char* filename() {
704 return ClassLoader::classpath_entry(_classpath_index)->name();
705 }
706
707 void set_index(int index) {
708 _classpath_index = index;
709 }
710 };
711
712
713 class PackageHashtable : public BasicHashtable<mtClass> {
714 private:
715 inline unsigned int compute_hash(const char *s, int n) {
716 unsigned int val = 0;
717 while (--n >= 0) {
718 val = *s++ + 31 * val;
719 }
720 return val;
721 }
722
723 PackageInfo* bucket(int index) {
724 return (PackageInfo*)BasicHashtable<mtClass>::bucket(index);
725 }
726
727 PackageInfo* get_entry(int index, unsigned int hash,
728 const char* pkgname, size_t n) {
729 for (PackageInfo* pp = bucket(index); pp != NULL; pp = pp->next()) {
730 if (pp->hash() == hash &&
731 strncmp(pkgname, pp->pkgname(), n) == 0 &&
732 pp->pkgname()[n] == '\0') {
733 return pp;
734 }
735 }
736 return NULL;
737 }
738
739 public:
740 PackageHashtable(int table_size)
741 : BasicHashtable<mtClass>(table_size, sizeof(PackageInfo)) {}
742
743 PackageHashtable(int table_size, HashtableBucket<mtClass>* t, int number_of_entries)
744 : BasicHashtable<mtClass>(table_size, sizeof(PackageInfo), t, number_of_entries) {}
745
746 PackageInfo* get_entry(const char* pkgname, int n) {
747 unsigned int hash = compute_hash(pkgname, n);
748 return get_entry(hash_to_index(hash), hash, pkgname, n);
749 }
750
751 PackageInfo* new_entry(char* pkgname, int n) {
752 unsigned int hash = compute_hash(pkgname, n);
753 PackageInfo* pp;
754 pp = (PackageInfo*)BasicHashtable<mtClass>::new_entry(hash);
755 pp->set_pkgname(pkgname);
756 return pp;
757 }
758
759 void add_entry(PackageInfo* pp) {
760 int index = hash_to_index(pp->hash());
761 BasicHashtable<mtClass>::add_entry(index, pp);
762 }
763
764 void copy_pkgnames(const char** packages) {
765 int n = 0;
766 for (int i = 0; i < table_size(); ++i) {
767 for (PackageInfo* pp = bucket(i); pp != NULL; pp = pp->next()) {
768 packages[n++] = pp->pkgname();
769 }
770 }
771 assert(n == number_of_entries(), "just checking");
772 }
773
774 CDS_ONLY(void copy_table(char** top, char* end, PackageHashtable* table);)
775 };
776
777 #if INCLUDE_CDS
778 void PackageHashtable::copy_table(char** top, char* end,
779 PackageHashtable* table) {
780 // Copy (relocate) the table to the shared space.
781 BasicHashtable<mtClass>::copy_table(top, end);
782
783 // Calculate the space needed for the package name strings.
784 int i;
785 intptr_t* tableSize = (intptr_t*)(*top);
786 *top += sizeof(intptr_t); // For table size
787 char* tableStart = *top;
788
789 for (i = 0; i < table_size(); ++i) {
790 for (PackageInfo* pp = table->bucket(i);
791 pp != NULL;
792 pp = pp->next()) {
793 int n1 = (int)(strlen(pp->pkgname()) + 1);
794 if (*top + n1 >= end) {
795 report_out_of_shared_space(SharedMiscData);
796 }
797 pp->set_pkgname((char*)memcpy(*top, pp->pkgname(), n1));
798 *top += n1;
799 }
800 }
801 *top = (char*)align_size_up((intptr_t)*top, sizeof(HeapWord));
802 if (*top >= end) {
803 report_out_of_shared_space(SharedMiscData);
804 }
805
806 // Write table size
807 intptr_t len = *top - (char*)tableStart;
808 *tableSize = len;
809 }
810
811
812 void ClassLoader::copy_package_info_buckets(char** top, char* end) {
813 _package_hash_table->copy_buckets(top, end);
814 }
815
816 void ClassLoader::copy_package_info_table(char** top, char* end) {
817 _package_hash_table->copy_table(top, end, _package_hash_table);
818 }
819 #endif
820
821 PackageInfo* ClassLoader::lookup_package(const char *pkgname) {
822 const char *cp = strrchr(pkgname, '/');
823 if (cp != NULL) {
824 // Package prefix found
825 int n = cp - pkgname + 1;
826 return _package_hash_table->get_entry(pkgname, n);
827 }
828 return NULL;
829 }
830
831
832 bool ClassLoader::add_package(const char *pkgname, int classpath_index, TRAPS) {
833 assert(pkgname != NULL, "just checking");
834 // Bootstrap loader no longer holds system loader lock obj serializing
835 // load_instance_class and thereby add_package
836 {
837 MutexLocker ml(PackageTable_lock, THREAD);
838 // First check for previously loaded entry
839 PackageInfo* pp = lookup_package(pkgname);
840 if (pp != NULL) {
841 // Existing entry found, check source of package
842 pp->set_index(classpath_index);
843 return true;
844 }
845
846 const char *cp = strrchr(pkgname, '/');
847 if (cp != NULL) {
848 // Package prefix found
849 int n = cp - pkgname + 1;
850
851 char* new_pkgname = NEW_C_HEAP_ARRAY(char, n + 1, mtClass);
852 if (new_pkgname == NULL) {
853 return false;
854 }
855
856 memcpy(new_pkgname, pkgname, n);
857 new_pkgname[n] = '\0';
858 pp = _package_hash_table->new_entry(new_pkgname, n);
859 pp->set_index(classpath_index);
860
861 // Insert into hash table
862 _package_hash_table->add_entry(pp);
863 }
864 return true;
865 }
866 }
867
868
869 oop ClassLoader::get_system_package(const char* name, TRAPS) {
870 PackageInfo* pp;
871 {
872 MutexLocker ml(PackageTable_lock, THREAD);
873 pp = lookup_package(name);
874 }
875 if (pp == NULL) {
876 return NULL;
877 } else {
878 Handle p = java_lang_String::create_from_str(pp->filename(), THREAD);
879 return p();
880 }
881 }
882
883
884 objArrayOop ClassLoader::get_system_packages(TRAPS) {
885 ResourceMark rm(THREAD);
886 int nof_entries;
887 const char** packages;
888 {
889 MutexLocker ml(PackageTable_lock, THREAD);
890 // Allocate resource char* array containing package names
891 nof_entries = _package_hash_table->number_of_entries();
892 if ((packages = NEW_RESOURCE_ARRAY(const char*, nof_entries)) == NULL) {
893 return NULL;
894 }
895 _package_hash_table->copy_pkgnames(packages);
896 }
897 // Allocate objArray and fill with java.lang.String
898 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
899 nof_entries, CHECK_0);
900 objArrayHandle result(THREAD, r);
901 for (int i = 0; i < nof_entries; i++) {
902 Handle str = java_lang_String::create_from_str(packages[i], CHECK_0);
903 result->obj_at_put(i, str());
904 }
905
906 return result();
907 }
908
909
910 instanceKlassHandle ClassLoader::load_classfile(Symbol* h_name, TRAPS) {
911 ResourceMark rm(THREAD);
912 const char* class_name = h_name->as_C_string();
913 EventMark m("loading class %s", class_name);
914 ThreadProfilerMark tpm(ThreadProfilerMark::classLoaderRegion);
915
916 stringStream st;
917 // st.print() uses too much stack space while handling a StackOverflowError
918 // st.print("%s.class", h_name->as_utf8());
919 st.print_raw(h_name->as_utf8());
920 st.print_raw(".class");
921 const char* file_name = st.as_string();
922 ClassLoaderExt::Context context(class_name, file_name, THREAD);
923
924 // Lookup stream for parsing .class file
925 ClassFileStream* stream = NULL;
926 int classpath_index = 0;
927 ClassPathEntry* e = NULL;
928 instanceKlassHandle h;
929 {
930 PerfClassTraceTime vmtimer(perf_sys_class_lookup_time(),
931 ((JavaThread*) THREAD)->get_thread_stat()->perf_timers_addr(),
932 PerfClassTraceTime::CLASS_LOAD);
933 e = _first_entry;
934 while (e != NULL) {
935 stream = e->open_stream(file_name, CHECK_NULL);
936 if (!context.check(stream, classpath_index)) {
937 return h; // NULL
938 }
939 if (stream != NULL) {
940 break;
941 }
942 e = e->next();
943 ++classpath_index;
944 }
945 }
946
947 if (stream != NULL) {
948 // class file found, parse it
949 ClassFileParser parser(stream);
950 ClassLoaderData* loader_data = ClassLoaderData::the_null_class_loader_data();
951 Handle protection_domain;
952 TempNewSymbol parsed_name = NULL;
953 instanceKlassHandle result = parser.parseClassFile(h_name,
954 loader_data,
955 protection_domain,
956 parsed_name,
957 context.should_verify(classpath_index),
958 THREAD);
959 if (HAS_PENDING_EXCEPTION) {
960 ResourceMark rm;
961 if (DumpSharedSpaces) {
962 tty->print_cr("Preload Error: Failed to load %s", class_name);
963 }
964 return h;
965 }
966 h = context.record_result(classpath_index, e, result, THREAD);
967 } else {
968 if (DumpSharedSpaces) {
969 tty->print_cr("Preload Warning: Cannot find %s", class_name);
970 }
971 }
972
973 return h;
974 }
975
976
977 void ClassLoader::create_package_info_table(HashtableBucket<mtClass> *t, int length,
978 int number_of_entries) {
979 assert(_package_hash_table == NULL, "One package info table allowed.");
980 assert(length == package_hash_table_size * sizeof(HashtableBucket<mtClass>),
981 "bad shared package info size.");
982 _package_hash_table = new PackageHashtable(package_hash_table_size, t,
983 number_of_entries);
984 }
985
986
987 void ClassLoader::create_package_info_table() {
988 assert(_package_hash_table == NULL, "shouldn't have one yet");
989 _package_hash_table = new PackageHashtable(package_hash_table_size);
990 }
991
992
993 // Initialize the class loader's access to methods in libzip. Parse and
994 // process the boot classpath into a list ClassPathEntry objects. Once
995 // this list has been created, it must not change order (see class PackageInfo)
996 // it can be appended to and is by jvmti and the kernel vm.
997
998 void ClassLoader::initialize() {
999 assert(_package_hash_table == NULL, "should have been initialized by now.");
1000 EXCEPTION_MARK;
1001
1002 if (UsePerfData) {
1003 // jvmstat performance counters
1004 NEWPERFTICKCOUNTER(_perf_accumulated_time, SUN_CLS, "time");
1005 NEWPERFTICKCOUNTER(_perf_class_init_time, SUN_CLS, "classInitTime");
1006 NEWPERFTICKCOUNTER(_perf_class_init_selftime, SUN_CLS, "classInitTime.self");
1007 NEWPERFTICKCOUNTER(_perf_class_verify_time, SUN_CLS, "classVerifyTime");
1008 NEWPERFTICKCOUNTER(_perf_class_verify_selftime, SUN_CLS, "classVerifyTime.self");
1009 NEWPERFTICKCOUNTER(_perf_class_link_time, SUN_CLS, "classLinkedTime");
1010 NEWPERFTICKCOUNTER(_perf_class_link_selftime, SUN_CLS, "classLinkedTime.self");
1011 NEWPERFEVENTCOUNTER(_perf_classes_inited, SUN_CLS, "initializedClasses");
1012 NEWPERFEVENTCOUNTER(_perf_classes_linked, SUN_CLS, "linkedClasses");
1013 NEWPERFEVENTCOUNTER(_perf_classes_verified, SUN_CLS, "verifiedClasses");
1014
1015 NEWPERFTICKCOUNTER(_perf_class_parse_time, SUN_CLS, "parseClassTime");
1016 NEWPERFTICKCOUNTER(_perf_class_parse_selftime, SUN_CLS, "parseClassTime.self");
1017 NEWPERFTICKCOUNTER(_perf_sys_class_lookup_time, SUN_CLS, "lookupSysClassTime");
1018 NEWPERFTICKCOUNTER(_perf_shared_classload_time, SUN_CLS, "sharedClassLoadTime");
1019 NEWPERFTICKCOUNTER(_perf_sys_classload_time, SUN_CLS, "sysClassLoadTime");
1020 NEWPERFTICKCOUNTER(_perf_app_classload_time, SUN_CLS, "appClassLoadTime");
1021 NEWPERFTICKCOUNTER(_perf_app_classload_selftime, SUN_CLS, "appClassLoadTime.self");
1022 NEWPERFEVENTCOUNTER(_perf_app_classload_count, SUN_CLS, "appClassLoadCount");
1023 NEWPERFTICKCOUNTER(_perf_define_appclasses, SUN_CLS, "defineAppClasses");
1024 NEWPERFTICKCOUNTER(_perf_define_appclass_time, SUN_CLS, "defineAppClassTime");
1025 NEWPERFTICKCOUNTER(_perf_define_appclass_selftime, SUN_CLS, "defineAppClassTime.self");
1026 NEWPERFBYTECOUNTER(_perf_app_classfile_bytes_read, SUN_CLS, "appClassBytes");
1027 NEWPERFBYTECOUNTER(_perf_sys_classfile_bytes_read, SUN_CLS, "sysClassBytes");
1028
1029
1030 // The following performance counters are added for measuring the impact
1031 // of the bug fix of 6365597. They are mainly focused on finding out
1032 // the behavior of system & user-defined classloader lock, whether
1033 // ClassLoader.loadClass/findClass is being called synchronized or not.
1034 // Also two additional counters are created to see whether 'UnsyncloadClass'
1035 // flag is being set or not and how many times load_instance_class call
1036 // fails with linkageError etc.
1037 NEWPERFEVENTCOUNTER(_sync_systemLoaderLockContentionRate, SUN_CLS,
1038 "systemLoaderLockContentionRate");
1039 NEWPERFEVENTCOUNTER(_sync_nonSystemLoaderLockContentionRate, SUN_CLS,
1040 "nonSystemLoaderLockContentionRate");
1041 NEWPERFEVENTCOUNTER(_sync_JVMFindLoadedClassLockFreeCounter, SUN_CLS,
1042 "jvmFindLoadedClassNoLockCalls");
1043 NEWPERFEVENTCOUNTER(_sync_JVMDefineClassLockFreeCounter, SUN_CLS,
1044 "jvmDefineClassNoLockCalls");
1045
1046 NEWPERFEVENTCOUNTER(_sync_JNIDefineClassLockFreeCounter, SUN_CLS,
1047 "jniDefineClassNoLockCalls");
1048
1049 NEWPERFEVENTCOUNTER(_unsafe_defineClassCallCounter, SUN_CLS,
1050 "unsafeDefineClassCalls");
1051
1052 NEWPERFEVENTCOUNTER(_isUnsyncloadClass, SUN_CLS, "isUnsyncloadClassSet");
1053 NEWPERFEVENTCOUNTER(_load_instance_class_failCounter, SUN_CLS,
1054 "loadInstanceClassFailRate");
1055
1056 // increment the isUnsyncloadClass counter if UnsyncloadClass is set.
1057 if (UnsyncloadClass) {
1058 _isUnsyncloadClass->inc();
1059 }
1060 }
1061
1062 // lookup zip library entry points
1063 load_zip_library();
1064 #if INCLUDE_CDS
1065 // initialize search path
1066 if (DumpSharedSpaces) {
1067 _shared_paths_misc_info = SharedClassUtil::allocate_shared_paths_misc_info();
1068 }
1069 #endif
1070 setup_bootstrap_search_path();
1071 }
1072
1073 #if INCLUDE_CDS
1074 void ClassLoader::initialize_shared_path() {
1075 if (DumpSharedSpaces) {
1076 ClassLoaderExt::setup_search_paths();
1077 _shared_paths_misc_info->write_jint(0); // see comments in SharedPathsMiscInfo::check()
1078 }
1079 }
1080 #endif
1081
1082 jlong ClassLoader::classloader_time_ms() {
1083 return UsePerfData ?
1084 Management::ticks_to_ms(_perf_accumulated_time->get_value()) : -1;
1085 }
1086
1087 jlong ClassLoader::class_init_count() {
1088 return UsePerfData ? _perf_classes_inited->get_value() : -1;
1089 }
1090
1091 jlong ClassLoader::class_init_time_ms() {
1092 return UsePerfData ?
1093 Management::ticks_to_ms(_perf_class_init_time->get_value()) : -1;
1094 }
1095
1096 jlong ClassLoader::class_verify_time_ms() {
1097 return UsePerfData ?
1098 Management::ticks_to_ms(_perf_class_verify_time->get_value()) : -1;
1099 }
1100
1101 jlong ClassLoader::class_link_count() {
1102 return UsePerfData ? _perf_classes_linked->get_value() : -1;
1103 }
1104
1105 jlong ClassLoader::class_link_time_ms() {
1106 return UsePerfData ?
1107 Management::ticks_to_ms(_perf_class_link_time->get_value()) : -1;
1108 }
1109
1110 int ClassLoader::compute_Object_vtable() {
1111 // hardwired for JDK1.2 -- would need to duplicate class file parsing
1112 // code to determine actual value from file
1113 // Would be value '11' if finals were in vtable
1114 int JDK_1_2_Object_vtable_size = 5;
1115 return JDK_1_2_Object_vtable_size * vtableEntry::size();
1116 }
1117
1118
1119 void classLoader_init() {
1120 ClassLoader::initialize();
1121 }
1122
1123
1124 bool ClassLoader::get_canonical_path(const char* orig, char* out, int len) {
1125 assert(orig != NULL && out != NULL && len > 0, "bad arguments");
1126 if (CanonicalizeEntry != NULL) {
1127 JavaThread* THREAD = JavaThread::current();
1128 JNIEnv* env = THREAD->jni_environment();
1129 ResourceMark rm(THREAD);
1130
1131 // os::native_path writes into orig_copy
1132 char* orig_copy = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, strlen(orig)+1);
1133 strcpy(orig_copy, orig);
1134 if ((CanonicalizeEntry)(env, os::native_path(orig_copy), out, len) < 0) {
1135 return false;
1136 }
1137 } else {
1138 // On JDK 1.2.2 the Canonicalize does not exist, so just do nothing
1139 strncpy(out, orig, len);
1140 out[len - 1] = '\0';
1141 }
1142 return true;
1143 }
1144
1145 #ifndef PRODUCT
1146
1147 void ClassLoader::verify() {
1148 _package_hash_table->verify();
1149 }
1150
1151
1152 // CompileTheWorld
1153 //
1154 // Iterates over all class path entries and forces compilation of all methods
1155 // in all classes found. Currently, only zip/jar archives are searched.
1156 //
1157 // The classes are loaded by the Java level bootstrap class loader, and the
1158 // initializer is called. If DelayCompilationDuringStartup is true (default),
1159 // the interpreter will run the initialization code. Note that forcing
1160 // initialization in this way could potentially lead to initialization order
1161 // problems, in which case we could just force the initialization bit to be set.
1162
1163
1164 // We need to iterate over the contents of a zip/jar file, so we replicate the
1165 // jzcell and jzfile definitions from zip_util.h but rename jzfile to real_jzfile,
1166 // since jzfile already has a void* definition.
1167 //
1168 // Note that this is only used in debug mode.
1169 //
1170 // HotSpot integration note:
1171 // Matches zip_util.h 1.14 99/06/01 from jdk1.3 beta H build
1172
1173
1174 // JDK 1.3 version
1175 typedef struct real_jzentry { /* Zip file entry */
1176 char *name; /* entry name */
1177 jint time; /* modification time */
1178 jint size; /* size of uncompressed data */
1179 jint csize; /* size of compressed data (zero if uncompressed) */
1180 jint crc; /* crc of uncompressed data */
1181 char *comment; /* optional zip file comment */
1182 jbyte *extra; /* optional extra data */
1183 jint pos; /* position of LOC header (if negative) or data */
1184 } real_jzentry;
1185
1186 typedef struct real_jzfile { /* Zip file */
1187 char *name; /* zip file name */
1188 jint refs; /* number of active references */
1189 jint fd; /* open file descriptor */
1190 void *lock; /* read lock */
1191 char *comment; /* zip file comment */
1192 char *msg; /* zip error message */
1193 void *entries; /* array of hash cells */
1194 jint total; /* total number of entries */
1195 unsigned short *table; /* Hash chain heads: indexes into entries */
1196 jint tablelen; /* number of hash eads */
1197 real_jzfile *next; /* next zip file in search list */
1198 jzentry *cache; /* we cache the most recently freed jzentry */
1199 /* Information on metadata names in META-INF directory */
1200 char **metanames; /* array of meta names (may have null names) */
1201 jint metacount; /* number of slots in metanames array */
1202 /* If there are any per-entry comments, they are in the comments array */
1203 char **comments;
1204 } real_jzfile;
1205
1206 void ClassPathDirEntry::compile_the_world(Handle loader, TRAPS) {
1207 // For now we only compile all methods in all classes in zip/jar files
1208 tty->print_cr("CompileTheWorld : Skipped classes in %s", _dir);
1209 tty->cr();
1210 }
1211
1212 bool ClassPathDirEntry::is_jrt() {
1213 return false;
1214 }
1215
1216 void ClassPathZipEntry::compile_the_world(Handle loader, TRAPS) {
1217 real_jzfile* zip = (real_jzfile*) _zip;
1218 tty->print_cr("CompileTheWorld : Compiling all classes in %s", zip->name);
1219 tty->cr();
1220 // Iterate over all entries in zip file
1221 for (int n = 0; ; n++) {
1222 real_jzentry * ze = (real_jzentry *)((*GetNextEntry)(_zip, n));
1223 if (ze == NULL) break;
1224 ClassLoader::compile_the_world_in(ze->name, loader, CHECK);
1225 }
1226 if (HAS_PENDING_EXCEPTION) {
1227 if (PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())) {
1228 CLEAR_PENDING_EXCEPTION;
1229 tty->print_cr("\nCompileTheWorld : Ran out of memory\n");
1230 tty->print_cr("Increase class metadata storage if a limit was set");
1231 } else {
1232 tty->print_cr("\nCompileTheWorld : Unexpected exception occurred\n");
1233 }
1234 }
1235 }
1236
1237 bool ClassPathZipEntry::is_jrt() {
1238 return false;
1239 }
1240
1241 void ClassLoader::compile_the_world() {
1242 EXCEPTION_MARK;
1243 HandleMark hm(THREAD);
1244 ResourceMark rm(THREAD);
1245 // Make sure we don't run with background compilation
1246 BackgroundCompilation = false;
1247 // Find bootstrap loader
1248 Handle system_class_loader (THREAD, SystemDictionary::java_system_loader());
1249 // Iterate over all bootstrap class path entries
1250 ClassPathEntry* e = _first_entry;
1251 jlong start = os::javaTimeMillis();
1252 while (e != NULL) {
1253 // We stop at bootmodules.jimage, unless it is the first bootstrap path entry
1254 if (e->is_jrt() && e != _first_entry) break;
1255 e->compile_the_world(system_class_loader, CATCH);
1256 e = e->next();
1257 }
1258 jlong end = os::javaTimeMillis();
1259 tty->print_cr("CompileTheWorld : Done (%d classes, %d methods, " JLONG_FORMAT " ms)",
1260 _compile_the_world_class_counter, _compile_the_world_method_counter, (end - start));
1261 {
1262 // Print statistics as if before normal exit:
1263 extern void print_statistics();
1264 print_statistics();
1265 }
1266 vm_exit(0);
1267 }
1268
1269 int ClassLoader::_compile_the_world_class_counter = 0;
1270 int ClassLoader::_compile_the_world_method_counter = 0;
1271 static int _codecache_sweep_counter = 0;
1272
1273 // Filter out all exceptions except OOMs
1274 static void clear_pending_exception_if_not_oom(TRAPS) {
1275 if (HAS_PENDING_EXCEPTION &&
1276 !PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())) {
1277 CLEAR_PENDING_EXCEPTION;
1278 }
1279 // The CHECK at the caller will propagate the exception out
1280 }
1281
1282 /**
1283 * Returns if the given method should be compiled when doing compile-the-world.
1284 *
1285 * TODO: This should be a private method in a CompileTheWorld class.
1286 */
1287 static bool can_be_compiled(methodHandle m, int comp_level) {
1288 assert(CompileTheWorld, "must be");
1289
1290 // It's not valid to compile a native wrapper for MethodHandle methods
1291 // that take a MemberName appendix since the bytecode signature is not
1292 // correct.
1293 vmIntrinsics::ID iid = m->intrinsic_id();
1294 if (MethodHandles::is_signature_polymorphic(iid) && MethodHandles::has_member_arg(iid)) {
1295 return false;
1296 }
1297
1298 return CompilationPolicy::can_be_compiled(m, comp_level);
1299 }
1300
1301 void ClassLoader::compile_the_world_in(char* name, Handle loader, TRAPS) {
1302 if (string_ends_with(name, ".class")) {
1303 // We have a .class file
1304 int len = (int)strlen(name);
1305 char buffer[2048];
1306 strncpy(buffer, name, len - 6);
1307 buffer[len-6] = 0;
1308 // If the file has a period after removing .class, it's not really a
1309 // valid class file. The class loader will check everything else.
1310 if (strchr(buffer, '.') == NULL) {
1311 _compile_the_world_class_counter++;
1312 if (_compile_the_world_class_counter > CompileTheWorldStopAt) return;
1313
1314 // Construct name without extension
1315 TempNewSymbol sym = SymbolTable::new_symbol(buffer, CHECK);
1316 // Use loader to load and initialize class
1317 Klass* ik = SystemDictionary::resolve_or_null(sym, loader, Handle(), THREAD);
1318 instanceKlassHandle k (THREAD, ik);
1319 if (k.not_null() && !HAS_PENDING_EXCEPTION) {
1320 k->initialize(THREAD);
1321 }
1322 bool exception_occurred = HAS_PENDING_EXCEPTION;
1323 clear_pending_exception_if_not_oom(CHECK);
1324 if (CompileTheWorldPreloadClasses && k.not_null()) {
1325 ConstantPool::preload_and_initialize_all_classes(k->constants(), THREAD);
1326 if (HAS_PENDING_EXCEPTION) {
1327 // If something went wrong in preloading we just ignore it
1328 clear_pending_exception_if_not_oom(CHECK);
1329 tty->print_cr("Preloading failed for (%d) %s", _compile_the_world_class_counter, buffer);
1330 }
1331 }
1332
1333 if (_compile_the_world_class_counter >= CompileTheWorldStartAt) {
1334 if (k.is_null() || exception_occurred) {
1335 // If something went wrong (e.g. ExceptionInInitializerError) we skip this class
1336 tty->print_cr("CompileTheWorld (%d) : Skipping %s", _compile_the_world_class_counter, buffer);
1337 } else {
1338 tty->print_cr("CompileTheWorld (%d) : %s", _compile_the_world_class_counter, buffer);
1339 // Preload all classes to get around uncommon traps
1340 // Iterate over all methods in class
1341 int comp_level = CompilationPolicy::policy()->initial_compile_level();
1342 for (int n = 0; n < k->methods()->length(); n++) {
1343 methodHandle m (THREAD, k->methods()->at(n));
1344 if (can_be_compiled(m, comp_level)) {
1345 if (++_codecache_sweep_counter == CompileTheWorldSafepointInterval) {
1346 // Give sweeper a chance to keep up with CTW
1347 VM_ForceSafepoint op;
1348 VMThread::execute(&op);
1349 _codecache_sweep_counter = 0;
1350 }
1351 // Force compilation
1352 CompileBroker::compile_method(m, InvocationEntryBci, comp_level,
1353 methodHandle(), 0, "CTW", THREAD);
1354 if (HAS_PENDING_EXCEPTION) {
1355 clear_pending_exception_if_not_oom(CHECK);
1356 tty->print_cr("CompileTheWorld (%d) : Skipping method: %s", _compile_the_world_class_counter, m->name_and_sig_as_C_string());
1357 } else {
1358 _compile_the_world_method_counter++;
1359 }
1360 if (TieredCompilation && TieredStopAtLevel >= CompLevel_full_optimization) {
1361 // Clobber the first compile and force second tier compilation
1362 nmethod* nm = m->code();
1363 if (nm != NULL && !m->is_method_handle_intrinsic()) {
1364 // Throw out the code so that the code cache doesn't fill up
1365 nm->make_not_entrant();
1366 m->clear_code();
1367 }
1368 CompileBroker::compile_method(m, InvocationEntryBci, CompLevel_full_optimization,
1369 methodHandle(), 0, "CTW", THREAD);
1370 if (HAS_PENDING_EXCEPTION) {
1371 clear_pending_exception_if_not_oom(CHECK);
1372 tty->print_cr("CompileTheWorld (%d) : Skipping method: %s", _compile_the_world_class_counter, m->name_and_sig_as_C_string());
1373 } else {
1374 _compile_the_world_method_counter++;
1375 }
1376 }
1377 } else {
1378 tty->print_cr("CompileTheWorld (%d) : Skipping method: %s", _compile_the_world_class_counter, m->name_and_sig_as_C_string());
1379 }
1380
1381 nmethod* nm = m->code();
1382 if (nm != NULL && !m->is_method_handle_intrinsic()) {
1383 // Throw out the code so that the code cache doesn't fill up
1384 nm->make_not_entrant();
1385 m->clear_code();
1386 }
1387 }
1388 }
1389 }
1390 }
1391 }
1392 }
1393
1394 #endif //PRODUCT
1395
1396 // Please keep following two functions at end of this file. With them placed at top or in middle of the file,
1397 // they could get inlined by agressive compiler, an unknown trick, see bug 6966589.
1398 void PerfClassTraceTime::initialize() {
1399 if (!UsePerfData) return;
1400
1401 if (_eventp != NULL) {
1402 // increment the event counter
1403 _eventp->inc();
1404 }
1405
1406 // stop the current active thread-local timer to measure inclusive time
1407 _prev_active_event = -1;
1408 for (int i=0; i < EVENT_TYPE_COUNT; i++) {
1409 if (_timers[i].is_active()) {
1410 assert(_prev_active_event == -1, "should have only one active timer");
1411 _prev_active_event = i;
1412 _timers[i].stop();
1413 }
1414 }
1415
1416 if (_recursion_counters == NULL || (_recursion_counters[_event_type])++ == 0) {
1417 // start the inclusive timer if not recursively called
1418 _t.start();
1419 }
1420
1421 // start thread-local timer of the given event type
1422 if (!_timers[_event_type].is_active()) {
1423 _timers[_event_type].start();
1424 }
1425 }
1426
1427 PerfClassTraceTime::~PerfClassTraceTime() {
1428 if (!UsePerfData) return;
1429
1430 // stop the thread-local timer as the event completes
1431 // and resume the thread-local timer of the event next on the stack
1432 _timers[_event_type].stop();
1433 jlong selftime = _timers[_event_type].ticks();
1434
1435 if (_prev_active_event >= 0) {
1436 _timers[_prev_active_event].start();
1437 }
1438
1439 if (_recursion_counters != NULL && --(_recursion_counters[_event_type]) > 0) return;
1440
1441 // increment the counters only on the leaf call
1442 _t.stop();
1443 _timep->inc(_t.ticks());
1444 if (_selftimep != NULL) {
1445 _selftimep->inc(selftime);
1446 }
1447 // add all class loading related event selftime to the accumulated time counter
1448 ClassLoader::perf_accumulated_time()->inc(selftime);
1449
1450 // reset the timer
1451 _timers[_event_type].reset();
1452 }