1 /*
2 * Copyright (c) 1997, 2016, 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/classFileStream.hpp"
27 #include "classfile/classLoader.hpp"
28 #include "classfile/classLoaderData.inline.hpp"
29 #include "classfile/classLoaderExt.hpp"
30 #include "classfile/javaClasses.hpp"
31 #include "classfile/jimage.hpp"
32 #include "classfile/moduleEntry.hpp"
33 #include "classfile/modules.hpp"
34 #include "classfile/packageEntry.hpp"
35 #include "classfile/klassFactory.hpp"
36 #include "classfile/systemDictionary.hpp"
37 #include "classfile/vmSymbols.hpp"
38 #include "compiler/compileBroker.hpp"
39 #include "gc/shared/collectedHeap.inline.hpp"
40 #include "gc/shared/generation.hpp"
41 #include "interpreter/bytecodeStream.hpp"
42 #include "interpreter/oopMapCache.hpp"
43 #include "logging/logTag.hpp"
44 #include "memory/allocation.inline.hpp"
45 #include "memory/filemap.hpp"
46 #include "memory/oopFactory.hpp"
47 #include "memory/resourceArea.hpp"
48 #include "memory/universe.inline.hpp"
49 #include "oops/instanceKlass.hpp"
50 #include "oops/instanceRefKlass.hpp"
51 #include "oops/objArrayOop.inline.hpp"
52 #include "oops/oop.inline.hpp"
53 #include "oops/symbol.hpp"
54 #include "prims/jvm_misc.hpp"
55 #include "runtime/arguments.hpp"
56 #include "runtime/compilationPolicy.hpp"
57 #include "runtime/fprofiler.hpp"
58 #include "runtime/handles.hpp"
59 #include "runtime/handles.inline.hpp"
60 #include "runtime/init.hpp"
61 #include "runtime/interfaceSupport.hpp"
62 #include "runtime/java.hpp"
63 #include "runtime/javaCalls.hpp"
64 #include "runtime/os.hpp"
65 #include "runtime/threadCritical.hpp"
66 #include "runtime/timer.hpp"
67 #include "runtime/vm_version.hpp"
68 #include "services/management.hpp"
69 #include "services/threadService.hpp"
70 #include "utilities/events.hpp"
71 #include "utilities/hashtable.inline.hpp"
72 #include "utilities/macros.hpp"
73 #if INCLUDE_CDS
74 #include "classfile/sharedClassUtil.hpp"
75 #include "classfile/sharedPathsMiscInfo.hpp"
76 #endif
77
78 // Entry points in zip.dll for loading zip/jar file entries
79
80 typedef void * * (JNICALL *ZipOpen_t)(const char *name, char **pmsg);
81 typedef void (JNICALL *ZipClose_t)(jzfile *zip);
82 typedef jzentry* (JNICALL *FindEntry_t)(jzfile *zip, const char *name, jint *sizeP, jint *nameLen);
83 typedef jboolean (JNICALL *ReadEntry_t)(jzfile *zip, jzentry *entry, unsigned char *buf, char *namebuf);
84 typedef jboolean (JNICALL *ReadMappedEntry_t)(jzfile *zip, jzentry *entry, unsigned char **buf, char *namebuf);
85 typedef jzentry* (JNICALL *GetNextEntry_t)(jzfile *zip, jint n);
86 typedef jboolean (JNICALL *ZipInflateFully_t)(void *inBuf, jlong inLen, void *outBuf, jlong outLen, char **pmsg);
87 typedef jint (JNICALL *Crc32_t)(jint crc, const jbyte *buf, jint len);
88
89 static ZipOpen_t ZipOpen = NULL;
90 static ZipClose_t ZipClose = NULL;
91 static FindEntry_t FindEntry = NULL;
92 static ReadEntry_t ReadEntry = NULL;
93 static ReadMappedEntry_t ReadMappedEntry = NULL;
94 static GetNextEntry_t GetNextEntry = NULL;
95 static canonicalize_fn_t CanonicalizeEntry = NULL;
96 static ZipInflateFully_t ZipInflateFully = NULL;
97 static Crc32_t Crc32 = NULL;
98
99 // Entry points for jimage.dll for loading jimage file entries
100
101 static JImageOpen_t JImageOpen = NULL;
102 static JImageClose_t JImageClose = NULL;
103 static JImagePackageToModule_t JImagePackageToModule = NULL;
104 static JImageFindResource_t JImageFindResource = NULL;
105 static JImageGetResource_t JImageGetResource = NULL;
106 static JImageResourceIterator_t JImageResourceIterator = NULL;
107 static JImage_ResourcePath_t JImageResourcePath = NULL;
108
109 // Globals
110
111 PerfCounter* ClassLoader::_perf_accumulated_time = NULL;
112 PerfCounter* ClassLoader::_perf_classes_inited = NULL;
113 PerfCounter* ClassLoader::_perf_class_init_time = NULL;
114 PerfCounter* ClassLoader::_perf_class_init_selftime = NULL;
115 PerfCounter* ClassLoader::_perf_classes_verified = NULL;
116 PerfCounter* ClassLoader::_perf_class_verify_time = NULL;
117 PerfCounter* ClassLoader::_perf_class_verify_selftime = NULL;
118 PerfCounter* ClassLoader::_perf_classes_linked = NULL;
119 PerfCounter* ClassLoader::_perf_class_link_time = NULL;
120 PerfCounter* ClassLoader::_perf_class_link_selftime = NULL;
121 PerfCounter* ClassLoader::_perf_class_parse_time = NULL;
122 PerfCounter* ClassLoader::_perf_class_parse_selftime = NULL;
123 PerfCounter* ClassLoader::_perf_sys_class_lookup_time = NULL;
124 PerfCounter* ClassLoader::_perf_shared_classload_time = NULL;
125 PerfCounter* ClassLoader::_perf_sys_classload_time = NULL;
126 PerfCounter* ClassLoader::_perf_app_classload_time = NULL;
127 PerfCounter* ClassLoader::_perf_app_classload_selftime = NULL;
128 PerfCounter* ClassLoader::_perf_app_classload_count = NULL;
129 PerfCounter* ClassLoader::_perf_define_appclasses = NULL;
130 PerfCounter* ClassLoader::_perf_define_appclass_time = NULL;
131 PerfCounter* ClassLoader::_perf_define_appclass_selftime = NULL;
132 PerfCounter* ClassLoader::_perf_app_classfile_bytes_read = NULL;
133 PerfCounter* ClassLoader::_perf_sys_classfile_bytes_read = NULL;
134 PerfCounter* ClassLoader::_sync_systemLoaderLockContentionRate = NULL;
135 PerfCounter* ClassLoader::_sync_nonSystemLoaderLockContentionRate = NULL;
136 PerfCounter* ClassLoader::_sync_JVMFindLoadedClassLockFreeCounter = NULL;
137 PerfCounter* ClassLoader::_sync_JVMDefineClassLockFreeCounter = NULL;
138 PerfCounter* ClassLoader::_sync_JNIDefineClassLockFreeCounter = NULL;
139 PerfCounter* ClassLoader::_unsafe_defineClassCallCounter = NULL;
140 PerfCounter* ClassLoader::_isUnsyncloadClass = NULL;
141 PerfCounter* ClassLoader::_load_instance_class_failCounter = NULL;
142
143 ClassPathEntry* ClassLoader::_first_entry = NULL;
144 ClassPathEntry* ClassLoader::_last_entry = NULL;
145 int ClassLoader::_num_entries = 0;
146 ClassPathEntry* ClassLoader::_first_append_entry = NULL;
147 bool ClassLoader::_has_jimage = false;
148 #if INCLUDE_CDS
149 GrowableArray<char*>* ClassLoader::_boot_modules_array = NULL;
150 GrowableArray<char*>* ClassLoader::_platform_modules_array = NULL;
151 SharedPathsMiscInfo* ClassLoader::_shared_paths_misc_info = NULL;
152 #endif
153
154 // helper routines
155 bool string_starts_with(const char* str, const char* str_to_find) {
156 size_t str_len = strlen(str);
157 size_t str_to_find_len = strlen(str_to_find);
158 if (str_to_find_len > str_len) {
159 return false;
160 }
161 return (strncmp(str, str_to_find, str_to_find_len) == 0);
162 }
163
164 static const char* get_jimage_version_string() {
165 static char version_string[10] = "";
166 if (version_string[0] == '\0') {
167 jio_snprintf(version_string, sizeof(version_string), "%d.%d",
168 Abstract_VM_Version::vm_major_version(), Abstract_VM_Version::vm_minor_version());
169 }
170 return (const char*)version_string;
171 }
172
173 bool ClassLoader::string_ends_with(const char* str, const char* str_to_find) {
174 size_t str_len = strlen(str);
175 size_t str_to_find_len = strlen(str_to_find);
176 if (str_to_find_len > str_len) {
177 return false;
178 }
179 return (strncmp(str + (str_len - str_to_find_len), str_to_find, str_to_find_len) == 0);
180 }
181
182
183 ClassPathDirEntry::ClassPathDirEntry(const char* dir) : ClassPathEntry() {
184 char* copy = NEW_C_HEAP_ARRAY(char, strlen(dir)+1, mtClass);
185 strcpy(copy, dir);
186 _dir = copy;
187 }
188
189
190 ClassFileStream* ClassPathDirEntry::open_stream(const char* name, TRAPS) {
191 // construct full path name
192 char path[JVM_MAXPATHLEN];
193 if (jio_snprintf(path, sizeof(path), "%s%s%s", _dir, os::file_separator(), name) == -1) {
194 return NULL;
195 }
196 // check if file exists
197 struct stat st;
198 if (os::stat(path, &st) == 0) {
199 #if INCLUDE_CDS
200 if (DumpSharedSpaces) {
201 // We have already check in ClassLoader::check_shared_classpath() that the directory is empty, so
202 // we should never find a file underneath it -- unless user has added a new file while we are running
203 // the dump, in which case let's quit!
204 ShouldNotReachHere();
205 }
206 #endif
207 // found file, open it
208 int file_handle = os::open(path, 0, 0);
209 if (file_handle != -1) {
210 // read contents into resource array
211 u1* buffer = NEW_RESOURCE_ARRAY(u1, st.st_size);
212 size_t num_read = os::read(file_handle, (char*) buffer, st.st_size);
213 // close file
214 os::close(file_handle);
215 // construct ClassFileStream
216 if (num_read == (size_t)st.st_size) {
217 if (UsePerfData) {
218 ClassLoader::perf_sys_classfile_bytes_read()->inc(num_read);
219 }
220 // Resource allocated
221 return new ClassFileStream(buffer,
222 st.st_size,
223 _dir,
224 ClassFileStream::verify);
225 }
226 }
227 }
228 return NULL;
229 }
230
231 ClassPathZipEntry::ClassPathZipEntry(jzfile* zip, const char* zip_name, bool is_boot_append) : ClassPathEntry() {
232 _zip = zip;
233 char *copy = NEW_C_HEAP_ARRAY(char, strlen(zip_name)+1, mtClass);
234 strcpy(copy, zip_name);
235 _zip_name = copy;
236 _is_boot_append = is_boot_append;
237 _multi_versioned = _unknown;
238 }
239
240 ClassPathZipEntry::~ClassPathZipEntry() {
241 if (ZipClose != NULL) {
242 (*ZipClose)(_zip);
243 }
244 FREE_C_HEAP_ARRAY(char, _zip_name);
245 }
246
247 u1* ClassPathZipEntry::open_entry(const char* name, jint* filesize, bool nul_terminate, TRAPS) {
248 // enable call to C land
249 JavaThread* thread = JavaThread::current();
250 ThreadToNativeFromVM ttn(thread);
251 // check whether zip archive contains name
252 jint name_len;
253 jzentry* entry = (*FindEntry)(_zip, name, filesize, &name_len);
254 if (entry == NULL) return NULL;
255 u1* buffer;
256 char name_buf[128];
257 char* filename;
258 if (name_len < 128) {
259 filename = name_buf;
260 } else {
261 filename = NEW_RESOURCE_ARRAY(char, name_len + 1);
262 }
263
264 // file found, get pointer to the entry in mmapped jar file.
265 if (ReadMappedEntry == NULL ||
266 !(*ReadMappedEntry)(_zip, entry, &buffer, filename)) {
267 // mmapped access not available, perhaps due to compression,
268 // read contents into resource array
269 int size = (*filesize) + ((nul_terminate) ? 1 : 0);
270 buffer = NEW_RESOURCE_ARRAY(u1, size);
271 if (!(*ReadEntry)(_zip, entry, buffer, filename)) return NULL;
272 }
273
274 // return result
275 if (nul_terminate) {
276 buffer[*filesize] = 0;
277 }
278 return buffer;
279 }
280
281 #if INCLUDE_CDS
282 u1* ClassPathZipEntry::open_versioned_entry(const char* name, jint* filesize, TRAPS) {
283 u1* buffer = NULL;
284 if (!_is_boot_append) {
285 assert(DumpSharedSpaces, "Should be called only for non-boot entries during dump time");
286 // We presume default is multi-release enabled
287 const char* multi_ver = Arguments::get_property("jdk.util.jar.enableMultiRelease");
288 const char* verstr = Arguments::get_property("jdk.util.jar.version");
289 bool is_multi_ver = (multi_ver == NULL ||
290 strcmp(multi_ver, "true") == 0 ||
291 strcmp(multi_ver, "force") == 0) &&
292 is_multiple_versioned(THREAD);
293 // command line version setting
294 int version = 0;
295 const int base_version = 8; // JDK8
296 int cur_ver = JDK_Version::current().major_version();
297 if (verstr != NULL) {
298 version = atoi(verstr);
299 if (version < base_version || version > cur_ver) {
300 is_multi_ver = false;
301 // print out warning, do not use assertion here since it will continue to look
302 // for proper version.
303 warning("JDK%d is not supported in multiple version jars", version);
304 }
305 }
306
307 if (is_multi_ver) {
308 int n;
309 char entry_name[JVM_MAXPATHLEN];
310 if (version > 0) {
311 n = jio_snprintf(entry_name, sizeof(entry_name), "META-INF/versions/%d/%s", version, name);
312 entry_name[n] = '\0';
313 buffer = open_entry((const char*)entry_name, filesize, false, CHECK_NULL);
314 if (buffer == NULL) {
315 warning("Could not find %s in %s, try to find highest version instead", entry_name, _zip_name);
316 }
317 }
318 if (buffer == NULL) {
319 for (int i = cur_ver; i >= base_version; i--) {
320 n = jio_snprintf(entry_name, sizeof(entry_name), "META-INF/versions/%d/%s", i, name);
321 entry_name[n] = '\0';
322 buffer = open_entry((const char*)entry_name, filesize, false, CHECK_NULL);
323 if (buffer != NULL) {
324 break;
325 }
326 }
327 }
328 }
329 }
330 return buffer;
331 }
332
333 bool ClassPathZipEntry::is_multiple_versioned(TRAPS) {
334 assert(DumpSharedSpaces, "called only at dump time");
335 if (_multi_versioned != _unknown) {
336 return (_multi_versioned == _yes) ? true : false;
337 }
338 jint size;
339 char* buffer = (char*)open_entry("META-INF/MANIFEST.MF", &size, true, CHECK_false);
340 if (buffer != NULL) {
341 char* p = buffer;
342 for ( ; *p; ++p) *p = tolower(*p);
343 if (strstr(buffer, "multi-release: true") != NULL) {
344 _multi_versioned = _yes;
345 return true;
346 }
347 }
348 _multi_versioned = _no;
349 return false;
350 }
351 #endif // INCLUDE_CDS
352
353 ClassFileStream* ClassPathZipEntry::open_stream(const char* name, TRAPS) {
354 jint filesize;
355 u1* buffer = open_versioned_entry(name, &filesize, CHECK_NULL);
356 if (buffer == NULL) {
357 buffer = open_entry(name, &filesize, false, CHECK_NULL);
358 if (buffer == NULL) {
359 return NULL;
360 }
361 }
362 if (UsePerfData) {
363 ClassLoader::perf_sys_classfile_bytes_read()->inc(filesize);
364 }
365 // Resource allocated
366 return new ClassFileStream(buffer,
367 filesize,
368 _zip_name,
369 ClassFileStream::verify);
370 }
371
372 // invoke function for each entry in the zip file
373 void ClassPathZipEntry::contents_do(void f(const char* name, void* context), void* context) {
374 JavaThread* thread = JavaThread::current();
375 HandleMark handle_mark(thread);
376 ThreadToNativeFromVM ttn(thread);
377 for (int n = 0; ; n++) {
378 jzentry * ze = ((*GetNextEntry)(_zip, n));
379 if (ze == NULL) break;
380 (*f)(ze->name, context);
381 }
382 }
383
384 ClassPathImageEntry::ClassPathImageEntry(JImageFile* jimage, const char* name) :
385 ClassPathEntry(),
386 _jimage(jimage) {
387 guarantee(jimage != NULL, "jimage file is null");
388 guarantee(name != NULL, "jimage file name is null");
389 size_t len = strlen(name) + 1;
390 _name = NEW_C_HEAP_ARRAY(const char, len, mtClass);
391 strncpy((char *)_name, name, len);
392 }
393
394 ClassPathImageEntry::~ClassPathImageEntry() {
395 if (_name != NULL) {
396 FREE_C_HEAP_ARRAY(const char, _name);
397 _name = NULL;
398 }
399 if (_jimage != NULL) {
400 (*JImageClose)(_jimage);
401 _jimage = NULL;
402 }
403 }
404
405 void ClassPathImageEntry::name_to_package(const char* name, char* buffer, int length) {
406 const char *pslash = strrchr(name, '/');
407 if (pslash == NULL) {
408 buffer[0] = '\0';
409 return;
410 }
411 int len = pslash - name;
412 #if INCLUDE_CDS
413 if (len <= 0 && DumpSharedSpaces) {
414 buffer[0] = '\0';
415 return;
416 }
417 #endif
418 assert(len > 0, "Bad length for package name");
419 if (len >= length) {
420 buffer[0] = '\0';
421 return;
422 }
423 // drop name after last slash (including slash)
424 // Ex., "java/lang/String.class" => "java/lang"
425 strncpy(buffer, name, len);
426 // ensure string termination (strncpy does not guarantee)
427 buffer[len] = '\0';
428 }
429
430 // For a class in a named module, look it up in the jimage file using this syntax:
431 // /<module-name>/<package-name>/<base-class>
432 //
433 // Assumptions:
434 // 1. There are no unnamed modules in the jimage file.
435 // 2. A package is in at most one module in the jimage file.
436 //
437 ClassFileStream* ClassPathImageEntry::open_stream(const char* name, TRAPS) {
438 jlong size;
439 JImageLocationRef location = (*JImageFindResource)(_jimage, "", get_jimage_version_string(), name, &size);
440
441 if (location == 0) {
442 char package[JIMAGE_MAX_PATH];
443 name_to_package(name, package, JIMAGE_MAX_PATH);
444
445 #if INCLUDE_CDS
446 if (package[0] == '\0' && DumpSharedSpaces) {
447 return NULL;
448 }
449 #endif
450 if (package[0] != '\0') {
451 if (!Universe::is_module_initialized()) {
452 location = (*JImageFindResource)(_jimage, "java.base", get_jimage_version_string(), name, &size);
453 #if INCLUDE_CDS
454 // CDS uses the boot class loader to load classes whose packages are in
455 // modules defined for other class loaders. So, for now, get their module
456 // names from the "modules" jimage file.
457 if (DumpSharedSpaces && location == 0) {
458 const char* module_name = (*JImagePackageToModule)(_jimage, package);
459 if (module_name != NULL) {
460 location = (*JImageFindResource)(_jimage, module_name, get_jimage_version_string(), name, &size);
461 }
462 }
463 #endif
464
465 } else {
466 // Get boot class loader's package entry table
467 PackageEntryTable* pkgEntryTable =
468 ClassLoaderData::the_null_class_loader_data()->packages();
469 // Get package's package entry
470 TempNewSymbol pkg_symbol = SymbolTable::new_symbol(package, CHECK_NULL);
471 PackageEntry* package_entry = pkgEntryTable->lookup_only(pkg_symbol);
472
473 if (package_entry != NULL) {
474 ResourceMark rm;
475 // Get the module name
476 ModuleEntry* module = package_entry->module();
477 assert(module != NULL, "Boot classLoader package missing module");
478 assert(module->is_named(), "Boot classLoader package is in unnamed module");
479 const char* module_name = module->name()->as_C_string();
480 if (module_name != NULL) {
481 location = (*JImageFindResource)(_jimage, module_name, get_jimage_version_string(), name, &size);
482 }
483 }
484 }
485 }
486 }
487 if (location != 0) {
488 if (UsePerfData) {
489 ClassLoader::perf_sys_classfile_bytes_read()->inc(size);
490 }
491 char* data = NEW_RESOURCE_ARRAY(char, size);
492 (*JImageGetResource)(_jimage, location, data, size);
493 // Resource allocated
494 return new ClassFileStream((u1*)data,
495 (int)size,
496 _name,
497 ClassFileStream::verify);
498 }
499
500 return NULL;
501 }
502
503 #ifndef PRODUCT
504 bool ctw_visitor(JImageFile* jimage,
505 const char* module_name, const char* version, const char* package,
506 const char* name, const char* extension, void* arg) {
507 if (strcmp(extension, "class") == 0) {
508 Thread* THREAD = Thread::current();
509 char path[JIMAGE_MAX_PATH];
510 jio_snprintf(path, JIMAGE_MAX_PATH - 1, "%s/%s.class", package, name);
511 ClassLoader::compile_the_world_in(path, *(Handle*)arg, THREAD);
512 return !HAS_PENDING_EXCEPTION;
513 }
514 return true;
515 }
516
517 void ClassPathImageEntry::compile_the_world(Handle loader, TRAPS) {
518 tty->print_cr("CompileTheWorld : Compiling all classes in %s", name());
519 tty->cr();
520 (*JImageResourceIterator)(_jimage, (JImageResourceVisitor_t)ctw_visitor, (void *)&loader);
521 if (HAS_PENDING_EXCEPTION) {
522 if (PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())) {
523 CLEAR_PENDING_EXCEPTION;
524 tty->print_cr("\nCompileTheWorld : Ran out of memory\n");
525 tty->print_cr("Increase class metadata storage if a limit was set");
526 } else {
527 tty->print_cr("\nCompileTheWorld : Unexpected exception occurred\n");
528 }
529 }
530 }
531 #endif
532
533 bool ClassPathImageEntry::is_jrt() {
534 return ClassLoader::is_jrt(name());
535 }
536
537 #if INCLUDE_CDS
538 void ClassLoader::exit_with_path_failure(const char* error, const char* message) {
539 assert(DumpSharedSpaces, "only called at dump time");
540 tty->print_cr("Hint: enable -Xlog:class+path=info to diagnose the failure");
541 vm_exit_during_initialization(error, message);
542 }
543 #endif
544
545 void ClassLoader::trace_class_path(const char* msg, const char* name) {
546 if (log_is_enabled(Info, class, path)) {
547 ResourceMark rm;
548 outputStream* out = Log(class, path)::info_stream();
549 if (msg) {
550 out->print("%s", msg);
551 }
552 if (name) {
553 if (strlen(name) < 256) {
554 out->print("%s", name);
555 } else {
556 // For very long paths, we need to print each character separately,
557 // as print_cr() has a length limit
558 while (name[0] != '\0') {
559 out->print("%c", name[0]);
560 name++;
561 }
562 }
563 }
564 out->cr();
565 }
566 }
567
568 #if INCLUDE_CDS
569 void ClassLoader::check_shared_classpath(const char *path) {
570 if (strcmp(path, "") == 0) {
571 exit_with_path_failure("Cannot have empty path in archived classpaths", NULL);
572 }
573
574 struct stat st;
575 if (os::stat(path, &st) == 0) {
576 if ((st.st_mode & S_IFREG) != S_IFREG) { // is directory
577 if (!os::dir_is_empty(path)) {
578 tty->print_cr("Error: non-empty directory '%s'", path);
579 exit_with_path_failure("CDS allows only empty directories in archived classpaths", NULL);
580 }
581 }
582 }
583 }
584 #endif
585
586 void ClassLoader::setup_bootstrap_search_path() {
587 assert(_first_entry == NULL, "should not setup bootstrap class search path twice");
588 const char* sys_class_path = Arguments::get_sysclasspath();
589 const char* java_class_path = Arguments::get_appclasspath();
590 if (PrintSharedArchiveAndExit) {
591 // Don't print sys_class_path - this is the bootcp of this current VM process, not necessarily
592 // the same as the bootcp of the shared archive.
593 } else {
594 trace_class_path("bootstrap loader class path=", sys_class_path);
595 trace_class_path("classpath: ", java_class_path);
596 }
597 #if INCLUDE_CDS
598 if (DumpSharedSpaces) {
599 _shared_paths_misc_info->add_boot_classpath(sys_class_path);
600 }
601 #endif
602 setup_search_path(sys_class_path, true);
603 }
604
605 #if INCLUDE_CDS
606 int ClassLoader::get_shared_paths_misc_info_size() {
607 return _shared_paths_misc_info->get_used_bytes();
608 }
609
610 void* ClassLoader::get_shared_paths_misc_info() {
611 return _shared_paths_misc_info->buffer();
612 }
613
614 bool ClassLoader::check_shared_paths_misc_info(void *buf, int size) {
615 SharedPathsMiscInfo* checker = SharedClassUtil::allocate_shared_paths_misc_info((char*)buf, size);
616 bool result = checker->check();
617 delete checker;
618 return result;
619 }
620 #endif
621
622 void ClassLoader::setup_search_path(const char *class_path, bool bootstrap_search) {
623 int offset = 0;
624 int len = (int)strlen(class_path);
625 int end = 0;
626 bool mark_append_entry = false;
627
628 // Iterate over class path entries
629 for (int start = 0; start < len; start = end) {
630 while (class_path[end] && class_path[end] != os::path_separator()[0]) {
631 end++;
632 }
633 EXCEPTION_MARK;
634 ResourceMark rm(THREAD);
635 mark_append_entry = (mark_append_entry ||
636 (bootstrap_search && (start == Arguments::bootclassloader_append_index())));
637 char* path = NEW_RESOURCE_ARRAY(char, end - start + 1);
638 strncpy(path, &class_path[start], end - start);
639 path[end - start] = '\0';
640 update_class_path_entry_list(path, false, mark_append_entry, false, bootstrap_search);
641
642 // Check on the state of the boot loader's append path
643 if (mark_append_entry && (_first_append_entry == NULL)) {
644 // Failure to mark the first append entry, most likely
645 // due to a non-existent path. Record the next entry
646 // as the first boot loader append entry.
647 mark_append_entry = true;
648 } else {
649 mark_append_entry = false;
650 }
651
652 #if INCLUDE_CDS
653 if (DumpSharedSpaces) {
654 check_shared_classpath(path);
655 }
656 #endif
657 while (class_path[end] == os::path_separator()[0]) {
658 end++;
659 }
660 }
661 }
662
663 ClassPathEntry* ClassLoader::create_class_path_entry(const char *path, const struct stat* st,
664 bool throw_exception,
665 bool is_boot_append, TRAPS) {
666 JavaThread* thread = JavaThread::current();
667 ClassPathEntry* new_entry = NULL;
668 if ((st->st_mode & S_IFREG) == S_IFREG) {
669 // Regular file, should be a zip or jimage file
670 // Canonicalized filename
671 char canonical_path[JVM_MAXPATHLEN];
672 if (!get_canonical_path(path, canonical_path, JVM_MAXPATHLEN)) {
673 // This matches the classic VM
674 if (throw_exception) {
675 THROW_MSG_(vmSymbols::java_io_IOException(), "Bad pathname", NULL);
676 } else {
677 return NULL;
678 }
679 }
680 jint error;
681 JImageFile* jimage =(*JImageOpen)(canonical_path, &error);
682 if (jimage != NULL) {
683 new_entry = new ClassPathImageEntry(jimage, canonical_path);
684 } else {
685 char* error_msg = NULL;
686 jzfile* zip;
687 {
688 // enable call to C land
689 ThreadToNativeFromVM ttn(thread);
690 HandleMark hm(thread);
691 zip = (*ZipOpen)(canonical_path, &error_msg);
692 }
693 if (zip != NULL && error_msg == NULL) {
694 new_entry = new ClassPathZipEntry(zip, path, is_boot_append);
695 } else {
696 ResourceMark rm(thread);
697 char *msg;
698 if (error_msg == NULL) {
699 msg = NEW_RESOURCE_ARRAY(char, strlen(path) + 128); ;
700 jio_snprintf(msg, strlen(path) + 127, "error in opening JAR file %s", path);
701 } else {
702 int len = (int)(strlen(path) + strlen(error_msg) + 128);
703 msg = NEW_RESOURCE_ARRAY(char, len); ;
704 jio_snprintf(msg, len - 1, "error in opening JAR file <%s> %s", error_msg, path);
705 }
706 // Don't complain about bad jar files added via -Xbootclasspath/a:.
707 if (throw_exception && is_init_completed()) {
708 THROW_MSG_(vmSymbols::java_lang_ClassNotFoundException(), msg, NULL);
709 } else {
710 return NULL;
711 }
712 }
713 }
714 log_info(class, path)("opened: %s", path);
715 log_info(class, load)("opened: %s", path);
716 } else {
717 // Directory
718 new_entry = new ClassPathDirEntry(path);
719 log_info(class, load)("path: %s", path);
720 }
721 return new_entry;
722 }
723
724
725 // Create a class path zip entry for a given path (return NULL if not found
726 // or zip/JAR file cannot be opened)
727 ClassPathZipEntry* ClassLoader::create_class_path_zip_entry(const char *path, bool is_boot_append) {
728 // check for a regular file
729 struct stat st;
730 if (os::stat(path, &st) == 0) {
731 if ((st.st_mode & S_IFREG) == S_IFREG) {
732 char canonical_path[JVM_MAXPATHLEN];
733 if (get_canonical_path(path, canonical_path, JVM_MAXPATHLEN)) {
734 char* error_msg = NULL;
735 jzfile* zip;
736 {
737 // enable call to C land
738 JavaThread* thread = JavaThread::current();
739 ThreadToNativeFromVM ttn(thread);
740 HandleMark hm(thread);
741 zip = (*ZipOpen)(canonical_path, &error_msg);
742 }
743 if (zip != NULL && error_msg == NULL) {
744 // create using canonical path
745 return new ClassPathZipEntry(zip, canonical_path, is_boot_append);
746 }
747 }
748 }
749 }
750 return NULL;
751 }
752
753 // The boot class loader must adhere to specfic visibility rules.
754 // Prior to loading a class in a named package, the package is checked
755 // to see if it is in a module defined to the boot loader. If the
756 // package is not in a module defined to the boot loader, the class
757 // must be loaded only in the boot loader's append path, which
758 // consists of [-Xbootclasspath/a]; [jvmti appended entries]
759 void ClassLoader::set_first_append_entry(ClassPathEntry *new_entry) {
760 if (_first_append_entry == NULL) {
761 _first_append_entry = new_entry;
762 }
763 }
764
765 // returns true if entry already on class path
766 bool ClassLoader::contains_entry(ClassPathEntry *entry) {
767 ClassPathEntry* e = _first_entry;
768 while (e != NULL) {
769 // assume zip entries have been canonicalized
770 if (strcmp(entry->name(), e->name()) == 0) {
771 return true;
772 }
773 e = e->next();
774 }
775 return false;
776 }
777
778 void ClassLoader::add_to_list(ClassPathEntry *new_entry) {
779 if (new_entry != NULL) {
780 if (_last_entry == NULL) {
781 _first_entry = _last_entry = new_entry;
782 } else {
783 _last_entry->set_next(new_entry);
784 _last_entry = new_entry;
785 }
786 }
787 _num_entries ++;
788 }
789
790 void ClassLoader::prepend_to_list(ClassPathEntry *new_entry) {
791 if (new_entry != NULL) {
792 if (_last_entry == NULL) {
793 _first_entry = _last_entry = new_entry;
794 } else {
795 new_entry->set_next(_first_entry);
796 _first_entry = new_entry;
797 }
798 }
799 _num_entries ++;
800 }
801
802 void ClassLoader::add_to_list(const char *apath) {
803 update_class_path_entry_list((char*)apath, false, false, false, false);
804 }
805
806 void ClassLoader::prepend_to_list(const char *apath) {
807 update_class_path_entry_list((char*)apath, false, false, true, false);
808 }
809
810 // Returns true IFF the file/dir exists and the entry was successfully created.
811 bool ClassLoader::update_class_path_entry_list(const char *path,
812 bool check_for_duplicates,
813 bool mark_append_entry,
814 bool prepend_entry,
815 bool is_boot_append,
816 bool throw_exception) {
817 struct stat st;
818 if (os::stat(path, &st) == 0) {
819 // File or directory found
820 ClassPathEntry* new_entry = NULL;
821 Thread* THREAD = Thread::current();
822 new_entry = create_class_path_entry(path, &st, throw_exception, is_boot_append, CHECK_(false));
823 if (new_entry == NULL) {
824 return false;
825 }
826
827 // Ensure that the first boot loader append entry will always be set correctly.
828 assert((!mark_append_entry ||
829 (mark_append_entry && (!check_for_duplicates || !contains_entry(new_entry)))),
830 "failed to mark boot loader's first append boundary");
831
832 // Do not reorder the bootclasspath which would break get_system_package().
833 // Add new entry to linked list
834
835 if (!check_for_duplicates || !contains_entry(new_entry)) {
836 ClassLoaderExt::add_class_path_entry(path, check_for_duplicates, new_entry, prepend_entry);
837 if (mark_append_entry) {
838 set_first_append_entry(new_entry);
839 }
840 }
841 return true;
842 } else {
843 #if INCLUDE_CDS
844 if (DumpSharedSpaces) {
845 _shared_paths_misc_info->add_nonexist_path(path);
846 }
847 #endif
848 return false;
849 }
850 }
851
852 void ClassLoader::print_bootclasspath() {
853 ClassPathEntry* e = _first_entry;
854 tty->print("[bootclasspath= ");
855 while (e != NULL) {
856 tty->print("%s ;", e->name());
857 e = e->next();
858 }
859 tty->print_cr("]");
860 }
861
862 void ClassLoader::load_zip_library() {
863 assert(ZipOpen == NULL, "should not load zip library twice");
864 // First make sure native library is loaded
865 os::native_java_library();
866 // Load zip library
867 char path[JVM_MAXPATHLEN];
868 char ebuf[1024];
869 void* handle = NULL;
870 if (os::dll_build_name(path, sizeof(path), Arguments::get_dll_dir(), "zip")) {
871 handle = os::dll_load(path, ebuf, sizeof ebuf);
872 }
873 if (handle == NULL) {
874 vm_exit_during_initialization("Unable to load ZIP library", path);
875 }
876 // Lookup zip entry points
877 ZipOpen = CAST_TO_FN_PTR(ZipOpen_t, os::dll_lookup(handle, "ZIP_Open"));
878 ZipClose = CAST_TO_FN_PTR(ZipClose_t, os::dll_lookup(handle, "ZIP_Close"));
879 FindEntry = CAST_TO_FN_PTR(FindEntry_t, os::dll_lookup(handle, "ZIP_FindEntry"));
880 ReadEntry = CAST_TO_FN_PTR(ReadEntry_t, os::dll_lookup(handle, "ZIP_ReadEntry"));
881 ReadMappedEntry = CAST_TO_FN_PTR(ReadMappedEntry_t, os::dll_lookup(handle, "ZIP_ReadMappedEntry"));
882 GetNextEntry = CAST_TO_FN_PTR(GetNextEntry_t, os::dll_lookup(handle, "ZIP_GetNextEntry"));
883 ZipInflateFully = CAST_TO_FN_PTR(ZipInflateFully_t, os::dll_lookup(handle, "ZIP_InflateFully"));
884 Crc32 = CAST_TO_FN_PTR(Crc32_t, os::dll_lookup(handle, "ZIP_CRC32"));
885
886 // ZIP_Close is not exported on Windows in JDK5.0 so don't abort if ZIP_Close is NULL
887 if (ZipOpen == NULL || FindEntry == NULL || ReadEntry == NULL ||
888 GetNextEntry == NULL || Crc32 == NULL) {
889 vm_exit_during_initialization("Corrupted ZIP library", path);
890 }
891
892 if (ZipInflateFully == NULL) {
893 vm_exit_during_initialization("Corrupted ZIP library ZIP_InflateFully missing", path);
894 }
895
896 // Lookup canonicalize entry in libjava.dll
897 void *javalib_handle = os::native_java_library();
898 CanonicalizeEntry = CAST_TO_FN_PTR(canonicalize_fn_t, os::dll_lookup(javalib_handle, "Canonicalize"));
899 // This lookup only works on 1.3. Do not check for non-null here
900 }
901
902 void ClassLoader::load_jimage_library() {
903 // First make sure native library is loaded
904 os::native_java_library();
905 // Load jimage library
906 char path[JVM_MAXPATHLEN];
907 char ebuf[1024];
908 void* handle = NULL;
909 if (os::dll_build_name(path, sizeof(path), Arguments::get_dll_dir(), "jimage")) {
910 handle = os::dll_load(path, ebuf, sizeof ebuf);
911 }
912 if (handle == NULL) {
913 vm_exit_during_initialization("Unable to load jimage library", path);
914 }
915
916 // Lookup jimage entry points
917 JImageOpen = CAST_TO_FN_PTR(JImageOpen_t, os::dll_lookup(handle, "JIMAGE_Open"));
918 guarantee(JImageOpen != NULL, "function JIMAGE_Open not found");
919 JImageClose = CAST_TO_FN_PTR(JImageClose_t, os::dll_lookup(handle, "JIMAGE_Close"));
920 guarantee(JImageClose != NULL, "function JIMAGE_Close not found");
921 JImagePackageToModule = CAST_TO_FN_PTR(JImagePackageToModule_t, os::dll_lookup(handle, "JIMAGE_PackageToModule"));
922 guarantee(JImagePackageToModule != NULL, "function JIMAGE_PackageToModule not found");
923 JImageFindResource = CAST_TO_FN_PTR(JImageFindResource_t, os::dll_lookup(handle, "JIMAGE_FindResource"));
924 guarantee(JImageFindResource != NULL, "function JIMAGE_FindResource not found");
925 JImageGetResource = CAST_TO_FN_PTR(JImageGetResource_t, os::dll_lookup(handle, "JIMAGE_GetResource"));
926 guarantee(JImageGetResource != NULL, "function JIMAGE_GetResource not found");
927 JImageResourceIterator = CAST_TO_FN_PTR(JImageResourceIterator_t, os::dll_lookup(handle, "JIMAGE_ResourceIterator"));
928 guarantee(JImageResourceIterator != NULL, "function JIMAGE_ResourceIterator not found");
929 JImageResourcePath = CAST_TO_FN_PTR(JImage_ResourcePath_t, os::dll_lookup(handle, "JIMAGE_ResourcePath"));
930 guarantee(JImageResourcePath != NULL, "function JIMAGE_ResourcePath not found");
931 }
932
933 jboolean ClassLoader::decompress(void *in, u8 inSize, void *out, u8 outSize, char **pmsg) {
934 return (*ZipInflateFully)(in, inSize, out, outSize, pmsg);
935 }
936
937 int ClassLoader::crc32(int crc, const char* buf, int len) {
938 assert(Crc32 != NULL, "ZIP_CRC32 is not found");
939 return (*Crc32)(crc, (const jbyte*)buf, len);
940 }
941
942 #if INCLUDE_CDS
943 void ClassLoader::initialize_module_loader_map(JImageFile* jimage) {
944 if (!DumpSharedSpaces) {
945 return; // only needed for CDS dump time
946 }
947
948 jlong size;
949 JImageLocationRef location = (*JImageFindResource)(jimage, "java.base", get_jimage_version_string(), MODULE_LOADER_MAP, &size);
950 if (location == 0) {
951 vm_exit_during_initialization(
952 "Cannot find ModuleLoaderMap location from modules jimage.", NULL);
953 }
954 char* buffer = NEW_RESOURCE_ARRAY(char, size);
955 jlong read = (*JImageGetResource)(jimage, location, buffer, size);
956 if (read != size) {
957 vm_exit_during_initialization(
958 "Cannot find ModuleLoaderMap resource from modules jimage.", NULL);
959 }
960 char* char_buf = (char*)buffer;
961 int buflen = (int)strlen(char_buf);
962 char* begin_ptr = char_buf;
963 char* end_ptr = strchr(begin_ptr, '\n');
964 bool process_boot_modules = false;
965 _boot_modules_array = new (ResourceObj::C_HEAP, mtInternal)
966 GrowableArray<char*>(INITIAL_BOOT_MODULES_ARRAY_SIZE, true);
967 _platform_modules_array = new (ResourceObj::C_HEAP, mtInternal)
968 GrowableArray<char*>(INITIAL_PLATFORM_MODULES_ARRAY_SIZE, true);
969 while (end_ptr != NULL && (end_ptr - char_buf) < buflen) {
970 // Allocate a buffer from the C heap to be appended to the _boot_modules_array
971 // or the _platform_modules_array.
972 char* temp_name = NEW_C_HEAP_ARRAY(char, (size_t)(end_ptr - begin_ptr + 1), mtInternal);
973 strncpy(temp_name, begin_ptr, end_ptr - begin_ptr);
974 temp_name[end_ptr - begin_ptr] = '\0';
975 if (strncmp(temp_name, "BOOT", 4) == 0) {
976 process_boot_modules = true;
977 FREE_C_HEAP_ARRAY(char, temp_name);
978 } else if (strncmp(temp_name, "PLATFORM", 8) == 0) {
979 process_boot_modules = false;
980 FREE_C_HEAP_ARRAY(char, temp_name);
981 } else {
982 // module name
983 if (process_boot_modules) {
984 _boot_modules_array->append(temp_name);
985 } else {
986 _platform_modules_array->append(temp_name);
987 }
988 }
989 begin_ptr = ++end_ptr;
990 end_ptr = strchr(begin_ptr, '\n');
991 }
992 FREE_RESOURCE_ARRAY(u1, buffer, size);
993 }
994 #endif
995
996 // Function add_package extracts the package from the fully qualified class name
997 // and checks if the package is in the boot loader's package entry table. If so,
998 // then it sets the classpath_index in the package entry record.
999 //
1000 // The classpath_index field is used to find the entry on the boot loader class
1001 // path for packages with classes loaded by the boot loader from -Xbootclasspath/a
1002 // in an unnamed module. It is also used to indicate (for all packages whose
1003 // classes are loaded by the boot loader) that at least one of the package's
1004 // classes has been loaded.
1005 bool ClassLoader::add_package(const char *fullq_class_name, s2 classpath_index, TRAPS) {
1006 assert(fullq_class_name != NULL, "just checking");
1007
1008 // Get package name from fully qualified class name.
1009 const char *cp = strrchr(fullq_class_name, '/');
1010 if (cp != NULL) {
1011 int len = cp - fullq_class_name;
1012 PackageEntryTable* pkg_entry_tbl =
1013 ClassLoaderData::the_null_class_loader_data()->packages();
1014 TempNewSymbol pkg_symbol =
1015 SymbolTable::new_symbol(fullq_class_name, len, CHECK_false);
1016 PackageEntry* pkg_entry = pkg_entry_tbl->lookup_only(pkg_symbol);
1017 if (pkg_entry != NULL) {
1018 assert(classpath_index != -1, "Unexpected classpath_index");
1019 pkg_entry->set_classpath_index(classpath_index);
1020 } else {
1021 return false;
1022 }
1023 }
1024 return true;
1025 }
1026
1027 oop ClassLoader::get_system_package(const char* name, TRAPS) {
1028 // Look up the name in the boot loader's package entry table.
1029 if (name != NULL) {
1030 TempNewSymbol package_sym = SymbolTable::new_symbol(name, (int)strlen(name), CHECK_NULL);
1031 // Look for the package entry in the boot loader's package entry table.
1032 PackageEntry* package =
1033 ClassLoaderData::the_null_class_loader_data()->packages()->lookup_only(package_sym);
1034
1035 // Return NULL if package does not exist or if no classes in that package
1036 // have been loaded.
1037 if (package != NULL && package->has_loaded_class()) {
1038 ModuleEntry* module = package->module();
1039 if (module->location() != NULL) {
1040 ResourceMark rm(THREAD);
1041 Handle ml = java_lang_String::create_from_str(
1042 module->location()->as_C_string(), THREAD);
1043 return ml();
1044 }
1045 // Return entry on boot loader class path.
1046 Handle cph = java_lang_String::create_from_str(
1047 ClassLoader::classpath_entry(package->classpath_index())->name(), THREAD);
1048 return cph();
1049 }
1050 }
1051 return NULL;
1052 }
1053
1054 objArrayOop ClassLoader::get_system_packages(TRAPS) {
1055 ResourceMark rm(THREAD);
1056 // List of pointers to PackageEntrys that have loaded classes.
1057 GrowableArray<PackageEntry*>* loaded_class_pkgs = new GrowableArray<PackageEntry*>(50);
1058 {
1059 MutexLocker ml(Module_lock, THREAD);
1060
1061 PackageEntryTable* pe_table =
1062 ClassLoaderData::the_null_class_loader_data()->packages();
1063
1064 // Collect the packages that have at least one loaded class.
1065 for (int x = 0; x < pe_table->table_size(); x++) {
1066 for (PackageEntry* package_entry = pe_table->bucket(x);
1067 package_entry != NULL;
1068 package_entry = package_entry->next()) {
1069 if (package_entry->has_loaded_class()) {
1070 loaded_class_pkgs->append(package_entry);
1071 }
1072 }
1073 }
1074 }
1075
1076
1077 // Allocate objArray and fill with java.lang.String
1078 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
1079 loaded_class_pkgs->length(), CHECK_NULL);
1080 objArrayHandle result(THREAD, r);
1081 for (int x = 0; x < loaded_class_pkgs->length(); x++) {
1082 PackageEntry* package_entry = loaded_class_pkgs->at(x);
1083 Handle str = java_lang_String::create_from_symbol(package_entry->name(), CHECK_NULL);
1084 result->obj_at_put(x, str());
1085 }
1086 return result();
1087 }
1088
1089 #if INCLUDE_CDS
1090 s2 ClassLoader::module_to_classloader(const char* module_name) {
1091
1092 assert(DumpSharedSpaces, "dump time only");
1093 assert(_boot_modules_array != NULL, "_boot_modules_array is NULL");
1094 assert(_platform_modules_array != NULL, "_platform_modules_array is NULL");
1095
1096 int array_size = _boot_modules_array->length();
1097 for (int i = 0; i < array_size; i++) {
1098 if (strcmp(module_name, _boot_modules_array->at(i)) == 0) {
1099 return BOOT_LOADER;
1100 }
1101 }
1102
1103 array_size = _platform_modules_array->length();
1104 for (int i = 0; i < array_size; i++) {
1105 if (strcmp(module_name, _platform_modules_array->at(i)) == 0) {
1106 return PLATFORM_LOADER;
1107 }
1108 }
1109
1110 return APP_LOADER;
1111 }
1112
1113 s2 ClassLoader::classloader_type(Symbol* class_name, ClassPathEntry* e,
1114 int classpath_index, TRAPS) {
1115 assert(DumpSharedSpaces, "Only used for CDS dump time");
1116
1117 // obtain the classloader type based on the class name.
1118 // First obtain the package name based on the class name. Then obtain
1119 // the classloader type based on the package name from the jimage using
1120 // a jimage API. If the classloader type cannot be found from the
1121 // jimage, it is determined by the class path entry.
1122 jshort loader_type = ClassLoader::APP_LOADER;
1123 if (e->is_jrt()) {
1124 int length = 0;
1125 const jbyte* pkg_string = InstanceKlass::package_from_name(class_name, length);
1126 if (pkg_string != NULL) {
1127 ResourceMark rm;
1128 TempNewSymbol pkg_name = SymbolTable::new_symbol((const char*)pkg_string, length, THREAD);
1129 const char* pkg_name_C_string = (const char*)(pkg_name->as_C_string());
1130 ClassPathImageEntry* cpie = (ClassPathImageEntry*)e;
1131 JImageFile* jimage = cpie->jimage();
1132 char* module_name = (char*)(*JImagePackageToModule)(jimage, pkg_name_C_string);
1133 if (module_name != NULL) {
1134 loader_type = ClassLoader::module_to_classloader(module_name);
1135 }
1136 }
1137 } else if (ClassLoaderExt::is_boot_classpath(classpath_index)) {
1138 loader_type = ClassLoader::BOOT_LOADER;
1139 }
1140 return loader_type;
1141 }
1142 #endif
1143
1144 // caller needs ResourceMark
1145 const char* ClassLoader::file_name_for_class_name(const char* class_name,
1146 int class_name_len) {
1147 assert(class_name != NULL, "invariant");
1148 assert((int)strlen(class_name) == class_name_len, "invariant");
1149
1150 static const char class_suffix[] = ".class";
1151
1152 char* const file_name = NEW_RESOURCE_ARRAY(char,
1153 class_name_len +
1154 sizeof(class_suffix)); // includes term NULL
1155
1156 strncpy(file_name, class_name, class_name_len);
1157 strncpy(&file_name[class_name_len], class_suffix, sizeof(class_suffix));
1158
1159 return file_name;
1160 }
1161
1162 instanceKlassHandle ClassLoader::load_class(Symbol* name, bool search_append_only, TRAPS) {
1163
1164 assert(name != NULL, "invariant");
1165 assert(THREAD->is_Java_thread(), "must be a JavaThread");
1166
1167 ResourceMark rm;
1168 HandleMark hm;
1169
1170 const char* const class_name = name->as_C_string();
1171
1172 EventMark m("loading class %s", class_name);
1173 ThreadProfilerMark tpm(ThreadProfilerMark::classLoaderRegion);
1174
1175 const char* const file_name = file_name_for_class_name(class_name,
1176 name->utf8_length());
1177 assert(file_name != NULL, "invariant");
1178
1179 ClassLoaderExt::Context context(class_name, file_name, THREAD);
1180
1181 // Lookup stream for parsing .class file
1182 ClassFileStream* stream = NULL;
1183 s2 classpath_index = 0;
1184
1185 // If DumpSharedSpaces is true, boot loader visibility boundaries are set
1186 // to be _first_entry to the end (all path entries).
1187 //
1188 // If search_append_only is true, boot loader visibility boundaries are
1189 // set to be _fist_append_entry to the end. This includes:
1190 // [-Xbootclasspath/a]; [jvmti appended entries]
1191 //
1192 // If both DumpSharedSpaces and search_append_only are false, boot loader
1193 // visibility boundaries are set to be _first_entry to the entry before
1194 // the _first_append_entry. This would include:
1195 // [-Xpatch:<dirs>]; [exploded build | modules]
1196 //
1197 // DumpSharedSpaces and search_append_only are mutually exclusive and cannot
1198 // be true at the same time.
1199 ClassPathEntry* e = (search_append_only ? _first_append_entry : _first_entry);
1200 ClassPathEntry* last_e =
1201 (search_append_only || DumpSharedSpaces ? NULL : _first_append_entry);
1202
1203 {
1204 if (search_append_only) {
1205 // For the boot loader append path search, must calculate
1206 // the starting classpath_index prior to attempting to
1207 // load the classfile.
1208 ClassPathEntry *tmp_e = _first_entry;
1209 while ((tmp_e != NULL) && (tmp_e != _first_append_entry)) {
1210 tmp_e = tmp_e->next();
1211 ++classpath_index;
1212 }
1213 }
1214
1215 // Attempt to load the classfile from either:
1216 // - [-Xpatch:dir]; exploded build | modules
1217 // or
1218 // - [-Xbootclasspath/a]; [jvmti appended entries]
1219 while ((e != NULL) && (e != last_e)) {
1220 stream = e->open_stream(file_name, CHECK_NULL);
1221 if (!context.check(stream, classpath_index)) {
1222 return NULL;
1223 }
1224 if (NULL != stream) {
1225 break;
1226 }
1227 e = e->next();
1228 ++classpath_index;
1229 }
1230 }
1231
1232 if (NULL == stream) {
1233 if (DumpSharedSpaces) {
1234 tty->print_cr("Preload Warning: Cannot find %s", class_name);
1235 }
1236 return NULL;
1237 }
1238
1239 stream->set_verify(context.should_verify(classpath_index));
1240
1241 ClassLoaderData* loader_data = ClassLoaderData::the_null_class_loader_data();
1242 Handle protection_domain;
1243
1244 instanceKlassHandle result = KlassFactory::create_from_stream(stream,
1245 name,
1246 loader_data,
1247 protection_domain,
1248 NULL, // host_klass
1249 NULL, // cp_patches
1250 NULL, // parsed_name
1251 THREAD);
1252 if (HAS_PENDING_EXCEPTION) {
1253 if (DumpSharedSpaces) {
1254 tty->print_cr("Preload Error: Failed to load %s", class_name);
1255 }
1256 return NULL;
1257 }
1258
1259 return context.record_result(name, e, classpath_index, result, THREAD);
1260 }
1261
1262 // Initialize the class loader's access to methods in libzip. Parse and
1263 // process the boot classpath into a list ClassPathEntry objects. Once
1264 // this list has been created, it must not change order (see class PackageInfo)
1265 // it can be appended to and is by jvmti and the kernel vm.
1266
1267 void ClassLoader::initialize() {
1268 EXCEPTION_MARK;
1269
1270 if (UsePerfData) {
1271 // jvmstat performance counters
1272 NEWPERFTICKCOUNTER(_perf_accumulated_time, SUN_CLS, "time");
1273 NEWPERFTICKCOUNTER(_perf_class_init_time, SUN_CLS, "classInitTime");
1274 NEWPERFTICKCOUNTER(_perf_class_init_selftime, SUN_CLS, "classInitTime.self");
1275 NEWPERFTICKCOUNTER(_perf_class_verify_time, SUN_CLS, "classVerifyTime");
1276 NEWPERFTICKCOUNTER(_perf_class_verify_selftime, SUN_CLS, "classVerifyTime.self");
1277 NEWPERFTICKCOUNTER(_perf_class_link_time, SUN_CLS, "classLinkedTime");
1278 NEWPERFTICKCOUNTER(_perf_class_link_selftime, SUN_CLS, "classLinkedTime.self");
1279 NEWPERFEVENTCOUNTER(_perf_classes_inited, SUN_CLS, "initializedClasses");
1280 NEWPERFEVENTCOUNTER(_perf_classes_linked, SUN_CLS, "linkedClasses");
1281 NEWPERFEVENTCOUNTER(_perf_classes_verified, SUN_CLS, "verifiedClasses");
1282
1283 NEWPERFTICKCOUNTER(_perf_class_parse_time, SUN_CLS, "parseClassTime");
1284 NEWPERFTICKCOUNTER(_perf_class_parse_selftime, SUN_CLS, "parseClassTime.self");
1285 NEWPERFTICKCOUNTER(_perf_sys_class_lookup_time, SUN_CLS, "lookupSysClassTime");
1286 NEWPERFTICKCOUNTER(_perf_shared_classload_time, SUN_CLS, "sharedClassLoadTime");
1287 NEWPERFTICKCOUNTER(_perf_sys_classload_time, SUN_CLS, "sysClassLoadTime");
1288 NEWPERFTICKCOUNTER(_perf_app_classload_time, SUN_CLS, "appClassLoadTime");
1289 NEWPERFTICKCOUNTER(_perf_app_classload_selftime, SUN_CLS, "appClassLoadTime.self");
1290 NEWPERFEVENTCOUNTER(_perf_app_classload_count, SUN_CLS, "appClassLoadCount");
1291 NEWPERFTICKCOUNTER(_perf_define_appclasses, SUN_CLS, "defineAppClasses");
1292 NEWPERFTICKCOUNTER(_perf_define_appclass_time, SUN_CLS, "defineAppClassTime");
1293 NEWPERFTICKCOUNTER(_perf_define_appclass_selftime, SUN_CLS, "defineAppClassTime.self");
1294 NEWPERFBYTECOUNTER(_perf_app_classfile_bytes_read, SUN_CLS, "appClassBytes");
1295 NEWPERFBYTECOUNTER(_perf_sys_classfile_bytes_read, SUN_CLS, "sysClassBytes");
1296
1297
1298 // The following performance counters are added for measuring the impact
1299 // of the bug fix of 6365597. They are mainly focused on finding out
1300 // the behavior of system & user-defined classloader lock, whether
1301 // ClassLoader.loadClass/findClass is being called synchronized or not.
1302 // Also two additional counters are created to see whether 'UnsyncloadClass'
1303 // flag is being set or not and how many times load_instance_class call
1304 // fails with linkageError etc.
1305 NEWPERFEVENTCOUNTER(_sync_systemLoaderLockContentionRate, SUN_CLS,
1306 "systemLoaderLockContentionRate");
1307 NEWPERFEVENTCOUNTER(_sync_nonSystemLoaderLockContentionRate, SUN_CLS,
1308 "nonSystemLoaderLockContentionRate");
1309 NEWPERFEVENTCOUNTER(_sync_JVMFindLoadedClassLockFreeCounter, SUN_CLS,
1310 "jvmFindLoadedClassNoLockCalls");
1311 NEWPERFEVENTCOUNTER(_sync_JVMDefineClassLockFreeCounter, SUN_CLS,
1312 "jvmDefineClassNoLockCalls");
1313
1314 NEWPERFEVENTCOUNTER(_sync_JNIDefineClassLockFreeCounter, SUN_CLS,
1315 "jniDefineClassNoLockCalls");
1316
1317 NEWPERFEVENTCOUNTER(_unsafe_defineClassCallCounter, SUN_CLS,
1318 "unsafeDefineClassCalls");
1319
1320 NEWPERFEVENTCOUNTER(_isUnsyncloadClass, SUN_CLS, "isUnsyncloadClassSet");
1321 NEWPERFEVENTCOUNTER(_load_instance_class_failCounter, SUN_CLS,
1322 "loadInstanceClassFailRate");
1323
1324 // increment the isUnsyncloadClass counter if UnsyncloadClass is set.
1325 if (UnsyncloadClass) {
1326 _isUnsyncloadClass->inc();
1327 }
1328 }
1329
1330 // lookup zip library entry points
1331 load_zip_library();
1332 // lookup jimage library entry points
1333 load_jimage_library();
1334 #if INCLUDE_CDS
1335 // initialize search path
1336 if (DumpSharedSpaces) {
1337 _shared_paths_misc_info = SharedClassUtil::allocate_shared_paths_misc_info();
1338 }
1339 #endif
1340 setup_bootstrap_search_path();
1341 }
1342
1343 #if INCLUDE_CDS
1344 void ClassLoader::initialize_shared_path() {
1345 if (DumpSharedSpaces) {
1346 ClassLoaderExt::setup_search_paths();
1347 _shared_paths_misc_info->write_jint(0); // see comments in SharedPathsMiscInfo::check()
1348 }
1349 }
1350 #endif
1351
1352 jlong ClassLoader::classloader_time_ms() {
1353 return UsePerfData ?
1354 Management::ticks_to_ms(_perf_accumulated_time->get_value()) : -1;
1355 }
1356
1357 jlong ClassLoader::class_init_count() {
1358 return UsePerfData ? _perf_classes_inited->get_value() : -1;
1359 }
1360
1361 jlong ClassLoader::class_init_time_ms() {
1362 return UsePerfData ?
1363 Management::ticks_to_ms(_perf_class_init_time->get_value()) : -1;
1364 }
1365
1366 jlong ClassLoader::class_verify_time_ms() {
1367 return UsePerfData ?
1368 Management::ticks_to_ms(_perf_class_verify_time->get_value()) : -1;
1369 }
1370
1371 jlong ClassLoader::class_link_count() {
1372 return UsePerfData ? _perf_classes_linked->get_value() : -1;
1373 }
1374
1375 jlong ClassLoader::class_link_time_ms() {
1376 return UsePerfData ?
1377 Management::ticks_to_ms(_perf_class_link_time->get_value()) : -1;
1378 }
1379
1380 int ClassLoader::compute_Object_vtable() {
1381 // hardwired for JDK1.2 -- would need to duplicate class file parsing
1382 // code to determine actual value from file
1383 // Would be value '11' if finals were in vtable
1384 int JDK_1_2_Object_vtable_size = 5;
1385 return JDK_1_2_Object_vtable_size * vtableEntry::size();
1386 }
1387
1388
1389 void classLoader_init() {
1390 ClassLoader::initialize();
1391 }
1392
1393
1394 bool ClassLoader::get_canonical_path(const char* orig, char* out, int len) {
1395 assert(orig != NULL && out != NULL && len > 0, "bad arguments");
1396 if (CanonicalizeEntry != NULL) {
1397 JavaThread* THREAD = JavaThread::current();
1398 JNIEnv* env = THREAD->jni_environment();
1399 ResourceMark rm(THREAD);
1400
1401 // os::native_path writes into orig_copy
1402 char* orig_copy = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, strlen(orig)+1);
1403 strcpy(orig_copy, orig);
1404 if ((CanonicalizeEntry)(env, os::native_path(orig_copy), out, len) < 0) {
1405 return false;
1406 }
1407 } else {
1408 // On JDK 1.2.2 the Canonicalize does not exist, so just do nothing
1409 strncpy(out, orig, len);
1410 out[len - 1] = '\0';
1411 }
1412 return true;
1413 }
1414
1415 void ClassLoader::create_javabase() {
1416 Thread* THREAD = Thread::current();
1417
1418 // Create java.base's module entry for the boot
1419 // class loader prior to loading j.l.Ojbect.
1420 ClassLoaderData* null_cld = ClassLoaderData::the_null_class_loader_data();
1421
1422 // Get module entry table
1423 ModuleEntryTable* null_cld_modules = null_cld->modules();
1424 if (null_cld_modules == NULL) {
1425 vm_exit_during_initialization("No ModuleEntryTable for the boot class loader");
1426 }
1427
1428 {
1429 MutexLocker ml(Module_lock, THREAD);
1430 ModuleEntry* jb_module = null_cld_modules->locked_create_entry_or_null(Handle(NULL), vmSymbols::java_base(), NULL, NULL, null_cld);
1431 if (jb_module == NULL) {
1432 vm_exit_during_initialization("Unable to create ModuleEntry for java.base");
1433 }
1434 ModuleEntryTable::set_javabase_module(jb_module);
1435 }
1436
1437 // When looking for the jimage file, only
1438 // search the boot loader's module path which
1439 // can consist of [-Xpatch]; exploded build | modules
1440 // Do not search the boot loader's append path.
1441 ClassPathEntry* e = _first_entry;
1442 ClassPathEntry* last_e = _first_append_entry;
1443 while ((e != NULL) && (e != last_e)) {
1444 JImageFile *jimage = e->jimage();
1445 if (jimage != NULL && e->is_jrt()) {
1446 set_has_jimage(true);
1447 #if INCLUDE_CDS
1448 ClassLoader::initialize_module_loader_map(jimage);
1449 #endif
1450 return;
1451 }
1452 e = e->next();
1453 }
1454 }
1455
1456 #ifndef PRODUCT
1457
1458 // CompileTheWorld
1459 //
1460 // Iterates over all class path entries and forces compilation of all methods
1461 // in all classes found. Currently, only zip/jar archives are searched.
1462 //
1463 // The classes are loaded by the Java level bootstrap class loader, and the
1464 // initializer is called. If DelayCompilationDuringStartup is true (default),
1465 // the interpreter will run the initialization code. Note that forcing
1466 // initialization in this way could potentially lead to initialization order
1467 // problems, in which case we could just force the initialization bit to be set.
1468
1469
1470 // We need to iterate over the contents of a zip/jar file, so we replicate the
1471 // jzcell and jzfile definitions from zip_util.h but rename jzfile to real_jzfile,
1472 // since jzfile already has a void* definition.
1473 //
1474 // Note that this is only used in debug mode.
1475 //
1476 // HotSpot integration note:
1477 // Matches zip_util.h 1.14 99/06/01 from jdk1.3 beta H build
1478
1479
1480 // JDK 1.3 version
1481 typedef struct real_jzentry { /* Zip file entry */
1482 char *name; /* entry name */
1483 jint time; /* modification time */
1484 jint size; /* size of uncompressed data */
1485 jint csize; /* size of compressed data (zero if uncompressed) */
1486 jint crc; /* crc of uncompressed data */
1487 char *comment; /* optional zip file comment */
1488 jbyte *extra; /* optional extra data */
1489 jint pos; /* position of LOC header (if negative) or data */
1490 } real_jzentry;
1491
1492 typedef struct real_jzfile { /* Zip file */
1493 char *name; /* zip file name */
1494 jint refs; /* number of active references */
1495 jint fd; /* open file descriptor */
1496 void *lock; /* read lock */
1497 char *comment; /* zip file comment */
1498 char *msg; /* zip error message */
1499 void *entries; /* array of hash cells */
1500 jint total; /* total number of entries */
1501 unsigned short *table; /* Hash chain heads: indexes into entries */
1502 jint tablelen; /* number of hash eads */
1503 real_jzfile *next; /* next zip file in search list */
1504 jzentry *cache; /* we cache the most recently freed jzentry */
1505 /* Information on metadata names in META-INF directory */
1506 char **metanames; /* array of meta names (may have null names) */
1507 jint metacount; /* number of slots in metanames array */
1508 /* If there are any per-entry comments, they are in the comments array */
1509 char **comments;
1510 } real_jzfile;
1511
1512 void ClassPathDirEntry::compile_the_world(Handle loader, TRAPS) {
1513 // For now we only compile all methods in all classes in zip/jar files
1514 tty->print_cr("CompileTheWorld : Skipped classes in %s", _dir);
1515 tty->cr();
1516 }
1517
1518 void ClassPathZipEntry::compile_the_world(Handle loader, TRAPS) {
1519 real_jzfile* zip = (real_jzfile*) _zip;
1520 tty->print_cr("CompileTheWorld : Compiling all classes in %s", zip->name);
1521 tty->cr();
1522 // Iterate over all entries in zip file
1523 for (int n = 0; ; n++) {
1524 real_jzentry * ze = (real_jzentry *)((*GetNextEntry)(_zip, n));
1525 if (ze == NULL) break;
1526 ClassLoader::compile_the_world_in(ze->name, loader, CHECK);
1527 }
1528 if (HAS_PENDING_EXCEPTION) {
1529 if (PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())) {
1530 CLEAR_PENDING_EXCEPTION;
1531 tty->print_cr("\nCompileTheWorld : Ran out of memory\n");
1532 tty->print_cr("Increase class metadata storage if a limit was set");
1533 } else {
1534 tty->print_cr("\nCompileTheWorld : Unexpected exception occurred\n");
1535 }
1536 }
1537 }
1538
1539 void ClassLoader::compile_the_world() {
1540 EXCEPTION_MARK;
1541 HandleMark hm(THREAD);
1542 ResourceMark rm(THREAD);
1543
1544 // Find bootstrap loader
1545 Handle system_class_loader (THREAD, SystemDictionary::java_system_loader());
1546 // Iterate over all bootstrap class path entries
1547 ClassPathEntry* e = _first_entry;
1548 jlong start = os::javaTimeMillis();
1549 while (e != NULL) {
1550 // We stop at "modules" jimage, unless it is the first bootstrap path entry
1551 if (e->is_jrt() && e != _first_entry) break;
1552 e->compile_the_world(system_class_loader, CATCH);
1553 e = e->next();
1554 }
1555 jlong end = os::javaTimeMillis();
1556 tty->print_cr("CompileTheWorld : Done (%d classes, %d methods, " JLONG_FORMAT " ms)",
1557 _compile_the_world_class_counter, _compile_the_world_method_counter, (end - start));
1558 {
1559 // Print statistics as if before normal exit:
1560 extern void print_statistics();
1561 print_statistics();
1562 }
1563 vm_exit(0);
1564 }
1565
1566 int ClassLoader::_compile_the_world_class_counter = 0;
1567 int ClassLoader::_compile_the_world_method_counter = 0;
1568 static int _codecache_sweep_counter = 0;
1569
1570 // Filter out all exceptions except OOMs
1571 static void clear_pending_exception_if_not_oom(TRAPS) {
1572 if (HAS_PENDING_EXCEPTION &&
1573 !PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())) {
1574 CLEAR_PENDING_EXCEPTION;
1575 }
1576 // The CHECK at the caller will propagate the exception out
1577 }
1578
1579 /**
1580 * Returns if the given method should be compiled when doing compile-the-world.
1581 *
1582 * TODO: This should be a private method in a CompileTheWorld class.
1583 */
1584 static bool can_be_compiled(methodHandle m, int comp_level) {
1585 assert(CompileTheWorld, "must be");
1586
1587 // It's not valid to compile a native wrapper for MethodHandle methods
1588 // that take a MemberName appendix since the bytecode signature is not
1589 // correct.
1590 vmIntrinsics::ID iid = m->intrinsic_id();
1591 if (MethodHandles::is_signature_polymorphic(iid) && MethodHandles::has_member_arg(iid)) {
1592 return false;
1593 }
1594
1595 return CompilationPolicy::can_be_compiled(m, comp_level);
1596 }
1597
1598 void ClassLoader::compile_the_world_in(char* name, Handle loader, TRAPS) {
1599 if (string_ends_with(name, ".class")) {
1600 // We have a .class file
1601 int len = (int)strlen(name);
1602 char buffer[2048];
1603 strncpy(buffer, name, len - 6);
1604 buffer[len-6] = 0;
1605 // If the file has a period after removing .class, it's not really a
1606 // valid class file. The class loader will check everything else.
1607 if (strchr(buffer, '.') == NULL) {
1608 _compile_the_world_class_counter++;
1609 if (_compile_the_world_class_counter > CompileTheWorldStopAt) return;
1610
1611 // Construct name without extension
1612 TempNewSymbol sym = SymbolTable::new_symbol(buffer, CHECK);
1613 // Use loader to load and initialize class
1614 Klass* ik = SystemDictionary::resolve_or_null(sym, loader, Handle(), THREAD);
1615 instanceKlassHandle k (THREAD, ik);
1616 if (k.not_null() && !HAS_PENDING_EXCEPTION) {
1617 k->initialize(THREAD);
1618 }
1619 bool exception_occurred = HAS_PENDING_EXCEPTION;
1620 clear_pending_exception_if_not_oom(CHECK);
1621 if (CompileTheWorldPreloadClasses && k.not_null()) {
1622 ConstantPool::preload_and_initialize_all_classes(k->constants(), THREAD);
1623 if (HAS_PENDING_EXCEPTION) {
1624 // If something went wrong in preloading we just ignore it
1625 clear_pending_exception_if_not_oom(CHECK);
1626 tty->print_cr("Preloading failed for (%d) %s", _compile_the_world_class_counter, buffer);
1627 }
1628 }
1629
1630 if (_compile_the_world_class_counter >= CompileTheWorldStartAt) {
1631 if (k.is_null() || exception_occurred) {
1632 // If something went wrong (e.g. ExceptionInInitializerError) we skip this class
1633 tty->print_cr("CompileTheWorld (%d) : Skipping %s", _compile_the_world_class_counter, buffer);
1634 } else {
1635 tty->print_cr("CompileTheWorld (%d) : %s", _compile_the_world_class_counter, buffer);
1636 // Preload all classes to get around uncommon traps
1637 // Iterate over all methods in class
1638 int comp_level = CompilationPolicy::policy()->initial_compile_level();
1639 for (int n = 0; n < k->methods()->length(); n++) {
1640 methodHandle m (THREAD, k->methods()->at(n));
1641 if (can_be_compiled(m, comp_level)) {
1642 if (++_codecache_sweep_counter == CompileTheWorldSafepointInterval) {
1643 // Give sweeper a chance to keep up with CTW
1644 VM_ForceSafepoint op;
1645 VMThread::execute(&op);
1646 _codecache_sweep_counter = 0;
1647 }
1648 // Force compilation
1649 CompileBroker::compile_method(m, InvocationEntryBci, comp_level,
1650 methodHandle(), 0, CompileTask::Reason_CTW, THREAD);
1651 if (HAS_PENDING_EXCEPTION) {
1652 clear_pending_exception_if_not_oom(CHECK);
1653 tty->print_cr("CompileTheWorld (%d) : Skipping method: %s", _compile_the_world_class_counter, m->name_and_sig_as_C_string());
1654 } else {
1655 _compile_the_world_method_counter++;
1656 }
1657 if (TieredCompilation && TieredStopAtLevel >= CompLevel_full_optimization) {
1658 // Clobber the first compile and force second tier compilation
1659 CompiledMethod* nm = m->code();
1660 if (nm != NULL && !m->is_method_handle_intrinsic()) {
1661 // Throw out the code so that the code cache doesn't fill up
1662 nm->make_not_entrant();
1663 m->clear_code();
1664 }
1665 CompileBroker::compile_method(m, InvocationEntryBci, CompLevel_full_optimization,
1666 methodHandle(), 0, CompileTask::Reason_CTW, THREAD);
1667 if (HAS_PENDING_EXCEPTION) {
1668 clear_pending_exception_if_not_oom(CHECK);
1669 tty->print_cr("CompileTheWorld (%d) : Skipping method: %s", _compile_the_world_class_counter, m->name_and_sig_as_C_string());
1670 } else {
1671 _compile_the_world_method_counter++;
1672 }
1673 }
1674 } else {
1675 tty->print_cr("CompileTheWorld (%d) : Skipping method: %s", _compile_the_world_class_counter, m->name_and_sig_as_C_string());
1676 }
1677
1678 CompiledMethod* nm = m->code();
1679 if (nm != NULL && !m->is_method_handle_intrinsic()) {
1680 // Throw out the code so that the code cache doesn't fill up
1681 nm->make_not_entrant();
1682 m->clear_code();
1683 }
1684 }
1685 }
1686 }
1687 }
1688 }
1689 }
1690
1691 #endif //PRODUCT
1692
1693 // Please keep following two functions at end of this file. With them placed at top or in middle of the file,
1694 // they could get inlined by agressive compiler, an unknown trick, see bug 6966589.
1695 void PerfClassTraceTime::initialize() {
1696 if (!UsePerfData) return;
1697
1698 if (_eventp != NULL) {
1699 // increment the event counter
1700 _eventp->inc();
1701 }
1702
1703 // stop the current active thread-local timer to measure inclusive time
1704 _prev_active_event = -1;
1705 for (int i=0; i < EVENT_TYPE_COUNT; i++) {
1706 if (_timers[i].is_active()) {
1707 assert(_prev_active_event == -1, "should have only one active timer");
1708 _prev_active_event = i;
1709 _timers[i].stop();
1710 }
1711 }
1712
1713 if (_recursion_counters == NULL || (_recursion_counters[_event_type])++ == 0) {
1714 // start the inclusive timer if not recursively called
1715 _t.start();
1716 }
1717
1718 // start thread-local timer of the given event type
1719 if (!_timers[_event_type].is_active()) {
1720 _timers[_event_type].start();
1721 }
1722 }
1723
1724 PerfClassTraceTime::~PerfClassTraceTime() {
1725 if (!UsePerfData) return;
1726
1727 // stop the thread-local timer as the event completes
1728 // and resume the thread-local timer of the event next on the stack
1729 _timers[_event_type].stop();
1730 jlong selftime = _timers[_event_type].ticks();
1731
1732 if (_prev_active_event >= 0) {
1733 _timers[_prev_active_event].start();
1734 }
1735
1736 if (_recursion_counters != NULL && --(_recursion_counters[_event_type]) > 0) return;
1737
1738 // increment the counters only on the leaf call
1739 _t.stop();
1740 _timep->inc(_t.ticks());
1741 if (_selftimep != NULL) {
1742 _selftimep->inc(selftime);
1743 }
1744 // add all class loading related event selftime to the accumulated time counter
1745 ClassLoader::perf_accumulated_time()->inc(selftime);
1746
1747 // reset the timer
1748 _timers[_event_type].reset();
1749 }