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 jzentry* (JNICALL *GetNextEntry_t)(jzfile *zip, jint n);
85 typedef jboolean (JNICALL *ZipInflateFully_t)(void *inBuf, jlong inLen, void *outBuf, jlong outLen, char **pmsg);
86 typedef jint (JNICALL *Crc32_t)(jint crc, const jbyte *buf, jint len);
87 typedef void (JNICALL *FreeEntry_t)(jzfile *zip, jzentry *entry);
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 GetNextEntry_t GetNextEntry = NULL;
94 static canonicalize_fn_t CanonicalizeEntry = NULL;
95 static ZipInflateFully_t ZipInflateFully = NULL;
96 static Crc32_t Crc32 = NULL;
97 static FreeEntry_t FreeEntry = 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 GrowableArray<ModuleClassPathList*>* ClassLoader::_patch_mod_entries = NULL;
144 GrowableArray<ModuleClassPathList*>* ClassLoader::_exploded_entries = NULL;
145 ClassPathEntry* ClassLoader::_jrt_entry = NULL;
146 ClassPathEntry* ClassLoader::_first_append_entry = NULL;
147 ClassPathEntry* ClassLoader::_last_append_entry = NULL;
148 int ClassLoader::_num_entries = 0;
149 #if INCLUDE_CDS
150 GrowableArray<char*>* ClassLoader::_boot_modules_array = NULL;
151 GrowableArray<char*>* ClassLoader::_platform_modules_array = NULL;
152 SharedPathsMiscInfo* ClassLoader::_shared_paths_misc_info = NULL;
153 int ClassLoader::_num_patch_mod_prefixes = 0;
154 #endif
155
156 // helper routines
157 bool string_starts_with(const char* str, const char* str_to_find) {
158 size_t str_len = strlen(str);
159 size_t str_to_find_len = strlen(str_to_find);
160 if (str_to_find_len > str_len) {
161 return false;
162 }
163 return (strncmp(str, str_to_find, str_to_find_len) == 0);
164 }
165
166 static const char* get_jimage_version_string() {
167 static char version_string[10] = "";
168 if (version_string[0] == '\0') {
169 jio_snprintf(version_string, sizeof(version_string), "%d.%d",
170 Abstract_VM_Version::vm_major_version(), Abstract_VM_Version::vm_minor_version());
171 }
172 return (const char*)version_string;
173 }
174
175 bool ClassLoader::string_ends_with(const char* str, const char* str_to_find) {
176 size_t str_len = strlen(str);
177 size_t str_to_find_len = strlen(str_to_find);
178 if (str_to_find_len > str_len) {
179 return false;
180 }
181 return (strncmp(str + (str_len - str_to_find_len), str_to_find, str_to_find_len) == 0);
182 }
183
184 // Used to obtain the package name from a fully qualified class name.
185 // It is the responsibility of the caller to establish a ResourceMark.
186 const char* ClassLoader::package_from_name(const char* const class_name, bool* bad_class_name) {
187 if (class_name == NULL) {
188 if (bad_class_name != NULL) {
189 *bad_class_name = true;
190 }
191 return NULL;
192 }
193
194 if (bad_class_name != NULL) {
195 *bad_class_name = false;
196 }
197
198 const char* const last_slash = strrchr(class_name, '/');
199 if (last_slash == NULL) {
200 // No package name
201 return NULL;
202 }
203
204 char* class_name_ptr = (char*) class_name;
205 // Skip over '['s
206 if (*class_name_ptr == '[') {
207 do {
208 class_name_ptr++;
209 } while (*class_name_ptr == '[');
210
211 // Fully qualified class names should not contain a 'L'.
212 // Set bad_class_name to true to indicate that the package name
213 // could not be obtained due to an error condition.
214 // In this situation, is_same_class_package returns false.
215 if (*class_name_ptr == 'L') {
216 if (bad_class_name != NULL) {
217 *bad_class_name = true;
218 }
219 return NULL;
220 }
221 }
222
223 int length = last_slash - class_name_ptr;
224
225 // A class name could have just the slash character in the name.
226 if (length <= 0) {
227 // No package name
228 if (bad_class_name != NULL) {
229 *bad_class_name = true;
230 }
231 return NULL;
232 }
233
234 // drop name after last slash (including slash)
235 // Ex., "java/lang/String.class" => "java/lang"
236 char* pkg_name = NEW_RESOURCE_ARRAY(char, length + 1);
237 strncpy(pkg_name, class_name_ptr, length);
238 *(pkg_name+length) = '\0';
239
240 return (const char *)pkg_name;
241 }
242
243 // Given a fully qualified class name, find its defining package in the class loader's
244 // package entry table.
245 static PackageEntry* get_package_entry(const char* class_name, ClassLoaderData* loader_data, TRAPS) {
246 ResourceMark rm(THREAD);
247 const char *pkg_name = ClassLoader::package_from_name(class_name);
248 if (pkg_name == NULL) {
249 return NULL;
250 }
251 PackageEntryTable* pkgEntryTable = loader_data->packages();
252 TempNewSymbol pkg_symbol = SymbolTable::new_symbol(pkg_name, CHECK_NULL);
253 return pkgEntryTable->lookup_only(pkg_symbol);
254 }
255
256 ClassPathDirEntry::ClassPathDirEntry(const char* dir) : ClassPathEntry() {
257 char* copy = NEW_C_HEAP_ARRAY(char, strlen(dir)+1, mtClass);
258 strcpy(copy, dir);
259 _dir = copy;
260 }
261
262
263 ClassFileStream* ClassPathDirEntry::open_stream(const char* name, TRAPS) {
264 // construct full path name
265 char* path = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, JVM_MAXPATHLEN);
266 if (jio_snprintf(path, JVM_MAXPATHLEN, "%s%s%s", _dir, os::file_separator(), name) == -1) {
267 FREE_RESOURCE_ARRAY(char, path, JVM_MAXPATHLEN);
268 return NULL;
269 }
270 // check if file exists
271 struct stat st;
272 if (os::stat(path, &st) == 0) {
273 #if INCLUDE_CDS
274 if (DumpSharedSpaces) {
275 // We have already check in ClassLoader::check_shared_classpath() that the directory is empty, so
276 // we should never find a file underneath it -- unless user has added a new file while we are running
277 // the dump, in which case let's quit!
278 ShouldNotReachHere();
279 }
280 #endif
281 // found file, open it
282 int file_handle = os::open(path, 0, 0);
283 if (file_handle != -1) {
284 // read contents into resource array
285 u1* buffer = NEW_RESOURCE_ARRAY(u1, st.st_size);
286 size_t num_read = os::read(file_handle, (char*) buffer, st.st_size);
287 // close file
288 os::close(file_handle);
289 // construct ClassFileStream
290 if (num_read == (size_t)st.st_size) {
291 if (UsePerfData) {
292 ClassLoader::perf_sys_classfile_bytes_read()->inc(num_read);
293 }
294 FREE_RESOURCE_ARRAY(char, path, JVM_MAXPATHLEN);
295 // Resource allocated
296 return new ClassFileStream(buffer,
297 st.st_size,
298 _dir,
299 ClassFileStream::verify);
300 }
301 }
302 }
303 FREE_RESOURCE_ARRAY(char, path, JVM_MAXPATHLEN);
304 return NULL;
305 }
306
307 ClassPathZipEntry::ClassPathZipEntry(jzfile* zip, const char* zip_name, bool is_boot_append) : ClassPathEntry() {
308 _zip = zip;
309 char *copy = NEW_C_HEAP_ARRAY(char, strlen(zip_name)+1, mtClass);
310 strcpy(copy, zip_name);
311 _zip_name = copy;
312 _is_boot_append = is_boot_append;
313 _multi_versioned = _unknown;
314 }
315
316 ClassPathZipEntry::~ClassPathZipEntry() {
317 if (ZipClose != NULL) {
318 (*ZipClose)(_zip);
319 }
320 FREE_C_HEAP_ARRAY(char, _zip_name);
321 }
322
323 bool ClassPathZipEntry::stream_exists(const char* name) {
324 // enable call to C land
325 JavaThread* thread = JavaThread::current();
326 ThreadToNativeFromVM ttn(thread);
327 // check whether zip archive contains name
328 jint name_len, filesize;
329 jzentry* entry = (*FindEntry)(_zip, name, &filesize, &name_len);
330 if (entry != NULL) {
331 (*FreeEntry)(_zip, entry);
332 return true;
333 }
334 return false;
335 }
336
337 u1* ClassPathZipEntry::open_entry(const char* name, jint* filesize, bool nul_terminate, TRAPS) {
338 // enable call to C land
339 JavaThread* thread = JavaThread::current();
340 ThreadToNativeFromVM ttn(thread);
341 // check whether zip archive contains name
342 jint name_len;
343 jzentry* entry = (*FindEntry)(_zip, name, filesize, &name_len);
344 if (entry == NULL) return NULL;
345 u1* buffer;
346 char name_buf[128];
347 char* filename;
348 if (name_len < 128) {
349 filename = name_buf;
350 } else {
351 filename = NEW_RESOURCE_ARRAY(char, name_len + 1);
352 }
353
354 // read contents into resource array
355 int size = (*filesize) + ((nul_terminate) ? 1 : 0);
356 buffer = NEW_RESOURCE_ARRAY(u1, size);
357 if (!(*ReadEntry)(_zip, entry, buffer, filename)) return NULL;
358
359 // return result
360 if (nul_terminate) {
361 buffer[*filesize] = 0;
362 }
363 return buffer;
364 }
365
366 #if INCLUDE_CDS
367 u1* ClassPathZipEntry::open_versioned_entry(const char* name, jint* filesize, TRAPS) {
368 u1* buffer = NULL;
369 if (DumpSharedSpaces && !_is_boot_append) {
370 // We presume default is multi-release enabled
371 const char* multi_ver = Arguments::get_property("jdk.util.jar.enableMultiRelease");
372 const char* verstr = Arguments::get_property("jdk.util.jar.version");
373 bool is_multi_ver = (multi_ver == NULL ||
374 strcmp(multi_ver, "true") == 0 ||
375 strcmp(multi_ver, "force") == 0) &&
376 is_multiple_versioned(THREAD);
377 // command line version setting
378 int version = 0;
379 const int base_version = 8; // JDK8
380 int cur_ver = JDK_Version::current().major_version();
381 if (verstr != NULL) {
382 version = atoi(verstr);
383 if (version < base_version || version > cur_ver) {
384 is_multi_ver = false;
385 // print out warning, do not use assertion here since it will continue to look
386 // for proper version.
387 warning("JDK%d is not supported in multiple version jars", version);
388 }
389 }
390
391 if (is_multi_ver) {
392 int n;
393 char* entry_name = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, JVM_MAXPATHLEN);
394 if (version > 0) {
395 n = jio_snprintf(entry_name, JVM_MAXPATHLEN, "META-INF/versions/%d/%s", version, name);
396 entry_name[n] = '\0';
397 buffer = open_entry((const char*)entry_name, filesize, false, CHECK_NULL);
398 if (buffer == NULL) {
399 warning("Could not find %s in %s, try to find highest version instead", entry_name, _zip_name);
400 }
401 }
402 if (buffer == NULL) {
403 for (int i = cur_ver; i >= base_version; i--) {
404 n = jio_snprintf(entry_name, JVM_MAXPATHLEN, "META-INF/versions/%d/%s", i, name);
405 entry_name[n] = '\0';
406 buffer = open_entry((const char*)entry_name, filesize, false, CHECK_NULL);
407 if (buffer != NULL) {
408 break;
409 }
410 }
411 }
412 FREE_RESOURCE_ARRAY(char, entry_name, JVM_MAXPATHLEN);
413 }
414 }
415 return buffer;
416 }
417
418 bool ClassPathZipEntry::is_multiple_versioned(TRAPS) {
419 assert(DumpSharedSpaces, "called only at dump time");
420 if (_multi_versioned != _unknown) {
421 return (_multi_versioned == _yes) ? true : false;
422 }
423 jint size;
424 char* buffer = (char*)open_entry("META-INF/MANIFEST.MF", &size, true, CHECK_false);
425 if (buffer != NULL) {
426 char* p = buffer;
427 for ( ; *p; ++p) *p = tolower(*p);
428 if (strstr(buffer, "multi-release: true") != NULL) {
429 _multi_versioned = _yes;
430 return true;
431 }
432 }
433 _multi_versioned = _no;
434 return false;
435 }
436 #endif // INCLUDE_CDS
437
438 ClassFileStream* ClassPathZipEntry::open_stream(const char* name, TRAPS) {
439 jint filesize;
440 u1* buffer = open_versioned_entry(name, &filesize, CHECK_NULL);
441 if (buffer == NULL) {
442 buffer = open_entry(name, &filesize, false, CHECK_NULL);
443 if (buffer == NULL) {
444 return NULL;
445 }
446 }
447 if (UsePerfData) {
448 ClassLoader::perf_sys_classfile_bytes_read()->inc(filesize);
449 }
450 // Resource allocated
451 return new ClassFileStream(buffer,
452 filesize,
453 _zip_name,
454 ClassFileStream::verify);
455 }
456
457 // invoke function for each entry in the zip file
458 void ClassPathZipEntry::contents_do(void f(const char* name, void* context), void* context) {
459 JavaThread* thread = JavaThread::current();
460 HandleMark handle_mark(thread);
461 ThreadToNativeFromVM ttn(thread);
462 for (int n = 0; ; n++) {
463 jzentry * ze = ((*GetNextEntry)(_zip, n));
464 if (ze == NULL) break;
465 (*f)(ze->name, context);
466 }
467 }
468
469 ClassPathImageEntry::ClassPathImageEntry(JImageFile* jimage, const char* name) :
470 ClassPathEntry(),
471 _jimage(jimage) {
472 guarantee(jimage != NULL, "jimage file is null");
473 guarantee(name != NULL, "jimage file name is null");
474 size_t len = strlen(name) + 1;
475 _name = NEW_C_HEAP_ARRAY(const char, len, mtClass);
476 strncpy((char *)_name, name, len);
477 }
478
479 ClassPathImageEntry::~ClassPathImageEntry() {
480 if (_name != NULL) {
481 FREE_C_HEAP_ARRAY(const char, _name);
482 _name = NULL;
483 }
484 if (_jimage != NULL) {
485 (*JImageClose)(_jimage);
486 _jimage = NULL;
487 }
488 }
489
490 // For a class in a named module, look it up in the jimage file using this syntax:
491 // /<module-name>/<package-name>/<base-class>
492 //
493 // Assumptions:
494 // 1. There are no unnamed modules in the jimage file.
495 // 2. A package is in at most one module in the jimage file.
496 //
497 ClassFileStream* ClassPathImageEntry::open_stream(const char* name, TRAPS) {
498 jlong size;
499 JImageLocationRef location = (*JImageFindResource)(_jimage, "", get_jimage_version_string(), name, &size);
500
501 if (location == 0) {
502 ResourceMark rm;
503 const char* pkg_name = ClassLoader::package_from_name(name);
504
505 if (pkg_name != NULL) {
506 if (!Universe::is_module_initialized()) {
507 location = (*JImageFindResource)(_jimage, JAVA_BASE_NAME, get_jimage_version_string(), name, &size);
508 #if INCLUDE_CDS
509 // CDS uses the boot class loader to load classes whose packages are in
510 // modules defined for other class loaders. So, for now, get their module
511 // names from the "modules" jimage file.
512 if (DumpSharedSpaces && location == 0) {
513 const char* module_name = (*JImagePackageToModule)(_jimage, pkg_name);
514 if (module_name != NULL) {
515 location = (*JImageFindResource)(_jimage, module_name, get_jimage_version_string(), name, &size);
516 }
517 }
518 #endif
519
520 } else {
521 PackageEntry* package_entry = get_package_entry(name, ClassLoaderData::the_null_class_loader_data(), CHECK_NULL);
522 if (package_entry != NULL) {
523 ResourceMark rm;
524 // Get the module name
525 ModuleEntry* module = package_entry->module();
526 assert(module != NULL, "Boot classLoader package missing module");
527 assert(module->is_named(), "Boot classLoader package is in unnamed module");
528 const char* module_name = module->name()->as_C_string();
529 if (module_name != NULL) {
530 location = (*JImageFindResource)(_jimage, module_name, get_jimage_version_string(), name, &size);
531 }
532 }
533 }
534 }
535 }
536 if (location != 0) {
537 if (UsePerfData) {
538 ClassLoader::perf_sys_classfile_bytes_read()->inc(size);
539 }
540 char* data = NEW_RESOURCE_ARRAY(char, size);
541 (*JImageGetResource)(_jimage, location, data, size);
542 // Resource allocated
543 return new ClassFileStream((u1*)data,
544 (int)size,
545 _name,
546 ClassFileStream::verify);
547 }
548
549 return NULL;
550 }
551
552 #ifndef PRODUCT
553 bool ctw_visitor(JImageFile* jimage,
554 const char* module_name, const char* version, const char* package,
555 const char* name, const char* extension, void* arg) {
556 if (strcmp(extension, "class") == 0) {
557 Thread* THREAD = Thread::current();
558 ResourceMark rm(THREAD);
559 char* path = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, JIMAGE_MAX_PATH);
560 jio_snprintf(path, JIMAGE_MAX_PATH - 1, "%s/%s.class", package, name);
561 ClassLoader::compile_the_world_in(path, *(Handle*)arg, THREAD);
562 return !HAS_PENDING_EXCEPTION;
563 }
564 return true;
565 }
566
567 void ClassPathImageEntry::compile_the_world(Handle loader, TRAPS) {
568 tty->print_cr("CompileTheWorld : Compiling all classes in %s", name());
569 tty->cr();
570 (*JImageResourceIterator)(_jimage, (JImageResourceVisitor_t)ctw_visitor, (void *)&loader);
571 if (HAS_PENDING_EXCEPTION) {
572 if (PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())) {
573 CLEAR_PENDING_EXCEPTION;
574 tty->print_cr("\nCompileTheWorld : Ran out of memory\n");
575 tty->print_cr("Increase class metadata storage if a limit was set");
576 } else {
577 tty->print_cr("\nCompileTheWorld : Unexpected exception occurred\n");
578 }
579 }
580 }
581 #endif
582
583 bool ClassPathImageEntry::is_jrt() {
584 return ClassLoader::is_jrt(name());
585 }
586
587 #if INCLUDE_CDS
588 void ClassLoader::exit_with_path_failure(const char* error, const char* message) {
589 assert(DumpSharedSpaces, "only called at dump time");
590 tty->print_cr("Hint: enable -Xlog:class+path=info to diagnose the failure");
591 vm_exit_during_initialization(error, message);
592 }
593 #endif
594
595 ModuleClassPathList::ModuleClassPathList(Symbol* module_name) {
596 _module_name = module_name;
597 _module_first_entry = NULL;
598 _module_last_entry = NULL;
599 }
600
601 ModuleClassPathList::~ModuleClassPathList() {
602 // Clean out each ClassPathEntry on list
603 ClassPathEntry* e = _module_first_entry;
604 while (e != NULL) {
605 ClassPathEntry* next_entry = e->next();
606 delete e;
607 e = next_entry;
608 }
609 }
610
611 void ModuleClassPathList::add_to_list(ClassPathEntry* new_entry) {
612 if (new_entry != NULL) {
613 if (_module_last_entry == NULL) {
614 _module_first_entry = _module_last_entry = new_entry;
615 } else {
616 _module_last_entry->set_next(new_entry);
617 _module_last_entry = new_entry;
618 }
619 }
620 }
621
622 void ClassLoader::trace_class_path(const char* msg, const char* name) {
623 if (log_is_enabled(Info, class, path)) {
624 ResourceMark rm;
625 outputStream* out = Log(class, path)::info_stream();
626 if (msg) {
627 out->print("%s", msg);
628 }
629 if (name) {
630 if (strlen(name) < 256) {
631 out->print("%s", name);
632 } else {
633 // For very long paths, we need to print each character separately,
634 // as print_cr() has a length limit
635 while (name[0] != '\0') {
636 out->print("%c", name[0]);
637 name++;
638 }
639 }
640 }
641 out->cr();
642 }
643 }
644
645 #if INCLUDE_CDS
646 void ClassLoader::check_shared_classpath(const char *path) {
647 if (strcmp(path, "") == 0) {
648 exit_with_path_failure("Cannot have empty path in archived classpaths", NULL);
649 }
650
651 struct stat st;
652 if (os::stat(path, &st) == 0) {
653 if ((st.st_mode & S_IFMT) != S_IFREG) { // is not a regular file
654 if (!os::dir_is_empty(path)) {
655 tty->print_cr("Error: non-empty directory '%s'", path);
656 exit_with_path_failure("CDS allows only empty directories in archived classpaths", NULL);
657 }
658 }
659 }
660 }
661 #endif
662
663 void ClassLoader::setup_bootstrap_search_path() {
664 const char* sys_class_path = Arguments::get_sysclasspath();
665 const char* java_class_path = Arguments::get_appclasspath();
666 if (PrintSharedArchiveAndExit) {
667 // Don't print sys_class_path - this is the bootcp of this current VM process, not necessarily
668 // the same as the bootcp of the shared archive.
669 } else {
670 trace_class_path("bootstrap loader class path=", sys_class_path);
671 trace_class_path("classpath: ", java_class_path);
672 }
673 #if INCLUDE_CDS
674 if (DumpSharedSpaces) {
675 _shared_paths_misc_info->add_boot_classpath(sys_class_path);
676 }
677 #endif
678 setup_search_path(sys_class_path, true);
679 }
680
681 #if INCLUDE_CDS
682 int ClassLoader::get_shared_paths_misc_info_size() {
683 return _shared_paths_misc_info->get_used_bytes();
684 }
685
686 void* ClassLoader::get_shared_paths_misc_info() {
687 return _shared_paths_misc_info->buffer();
688 }
689
690 bool ClassLoader::check_shared_paths_misc_info(void *buf, int size) {
691 SharedPathsMiscInfo* checker = SharedClassUtil::allocate_shared_paths_misc_info((char*)buf, size);
692 bool result = checker->check();
693 delete checker;
694 return result;
695 }
696 #endif
697
698 // Construct the array of module/path pairs as specified to --patch-module
699 // for the boot loader to search ahead of the jimage, if the class being
700 // loaded is defined to a module that has been specified to --patch-module.
701 void ClassLoader::setup_patch_mod_entries() {
702 Thread* THREAD = Thread::current();
703 GrowableArray<ModulePatchPath*>* patch_mod_args = Arguments::get_patch_mod_prefix();
704 int num_of_entries = patch_mod_args->length();
705
706
707 // Set up the boot loader's _patch_mod_entries list
708 _patch_mod_entries = new (ResourceObj::C_HEAP, mtModule) GrowableArray<ModuleClassPathList*>(num_of_entries, true);
709
710 for (int i = 0; i < num_of_entries; i++) {
711 const char* module_name = (patch_mod_args->at(i))->module_name();
712 Symbol* const module_sym = SymbolTable::lookup(module_name, (int)strlen(module_name), CHECK);
713 assert(module_sym != NULL, "Failed to obtain Symbol for module name");
714 ModuleClassPathList* module_cpl = new ModuleClassPathList(module_sym);
715
716 char* class_path = (patch_mod_args->at(i))->path_string();
717 int len = (int)strlen(class_path);
718 int end = 0;
719 // Iterate over the module's class path entries
720 for (int start = 0; start < len; start = end) {
721 while (class_path[end] && class_path[end] != os::path_separator()[0]) {
722 end++;
723 }
724 EXCEPTION_MARK;
725 ResourceMark rm(THREAD);
726 char* path = NEW_RESOURCE_ARRAY(char, end - start + 1);
727 strncpy(path, &class_path[start], end - start);
728 path[end - start] = '\0';
729
730 struct stat st;
731 if (os::stat(path, &st) == 0) {
732 // File or directory found
733 Thread* THREAD = Thread::current();
734 ClassPathEntry* new_entry = create_class_path_entry(path, &st, false, false, CHECK);
735 // If the path specification is valid, enter it into this module's list
736 if (new_entry != NULL) {
737 module_cpl->add_to_list(new_entry);
738 }
739 }
740
741 while (class_path[end] == os::path_separator()[0]) {
742 end++;
743 }
744 }
745
746 // Record the module into the list of --patch-module entries only if
747 // valid ClassPathEntrys have been created
748 if (module_cpl->module_first_entry() != NULL) {
749 _patch_mod_entries->push(module_cpl);
750 }
751 }
752 }
753
754 // Determine whether the module has been patched via the command-line
755 // option --patch-module
756 bool ClassLoader::is_in_patch_mod_entries(Symbol* module_name) {
757 if (_patch_mod_entries != NULL && _patch_mod_entries->is_nonempty()) {
758 int table_len = _patch_mod_entries->length();
759 for (int i = 0; i < table_len; i++) {
760 ModuleClassPathList* patch_mod = _patch_mod_entries->at(i);
761 if (module_name->fast_compare(patch_mod->module_name()) == 0) {
762 return true;
763 }
764 }
765 }
766 return false;
767 }
768
769 void ClassLoader::setup_search_path(const char *class_path, bool bootstrap_search) {
770 int len = (int)strlen(class_path);
771 int end = 0;
772 bool set_base_piece = bootstrap_search;
773
774 // Iterate over class path entries
775 for (int start = 0; start < len; start = end) {
776 while (class_path[end] && class_path[end] != os::path_separator()[0]) {
777 end++;
778 }
779 EXCEPTION_MARK;
780 ResourceMark rm(THREAD);
781 char* path = NEW_RESOURCE_ARRAY(char, end - start + 1);
782 strncpy(path, &class_path[start], end - start);
783 path[end - start] = '\0';
784
785 // The first time through the bootstrap_search setup, it must be determined
786 // what the base or core piece of the boot loader search is. Either a java runtime
787 // image is present or this is an exploded module build situation.
788 if (set_base_piece) {
789 assert(string_ends_with(path, MODULES_IMAGE_NAME) || string_ends_with(path, JAVA_BASE_NAME),
790 "Incorrect boot loader search path, no java runtime image or " JAVA_BASE_NAME " exploded build");
791 struct stat st;
792 if (os::stat(path, &st) == 0) {
793 // Directory found
794 Thread* THREAD = Thread::current();
795 ClassPathEntry* new_entry = create_class_path_entry(path, &st, false, false, CHECK);
796
797 // Check for a jimage
798 if (Arguments::has_jimage()) {
799 assert(_jrt_entry == NULL, "should not setup bootstrap class search path twice");
800 assert(new_entry != NULL && new_entry->is_jrt(), "No java runtime image present");
801 _jrt_entry = new_entry;
802 ++_num_entries;
803 #if INCLUDE_CDS
804 if (DumpSharedSpaces) {
805 JImageFile *jimage = _jrt_entry->jimage();
806 assert(jimage != NULL, "No java runtime image file present");
807 ClassLoader::initialize_module_loader_map(jimage);
808 }
809 #endif
810 }
811 } else {
812 // If path does not exist, exit
813 vm_exit_during_initialization("Unable to establish the boot loader search path", path);
814 }
815 set_base_piece = false;
816 } else {
817 // Every entry on the system boot class path after the initial base piece,
818 // which is set by os::set_boot_path(), is considered an appended entry.
819 update_class_path_entry_list(path, false, bootstrap_search);
820 }
821
822 #if INCLUDE_CDS
823 if (DumpSharedSpaces) {
824 check_shared_classpath(path);
825 }
826 #endif
827 while (class_path[end] == os::path_separator()[0]) {
828 end++;
829 }
830 }
831 }
832
833 // During an exploded modules build, each module defined to the boot loader
834 // will be added to the ClassLoader::_exploded_entries array.
835 void ClassLoader::add_to_exploded_build_list(Symbol* module_sym, TRAPS) {
836 assert(!ClassLoader::has_jrt_entry(), "Exploded build not applicable");
837
838 // Set up the boot loader's _exploded_entries list
839 if (_exploded_entries == NULL) {
840 _exploded_entries = new (ResourceObj::C_HEAP, mtModule) GrowableArray<ModuleClassPathList*>(EXPLODED_ENTRY_SIZE, true);
841 }
842
843 // Find the module's symbol
844 ResourceMark rm(THREAD);
845 const char *module_name = module_sym->as_C_string();
846 const char *home = Arguments::get_java_home();
847 const char file_sep = os::file_separator()[0];
848 // 10 represents the length of "modules" + 2 file separators + \0
849 size_t len = strlen(home) + strlen(module_name) + 10;
850 char *path = NEW_C_HEAP_ARRAY(char, len, mtModule);
851 jio_snprintf(path, len, "%s%cmodules%c%s", home, file_sep, file_sep, module_name);
852
853 struct stat st;
854 if (os::stat(path, &st) == 0) {
855 // Directory found
856 ClassPathEntry* new_entry = create_class_path_entry(path, &st, false, false, CHECK);
857
858 // If the path specification is valid, enter it into this module's list.
859 // There is no need to check for duplicate modules in the exploded entry list,
860 // since no two modules with the same name can be defined to the boot loader.
861 // This is checked at module definition time in Modules::define_module.
862 if (new_entry != NULL) {
863 ModuleClassPathList* module_cpl = new ModuleClassPathList(module_sym);
864 module_cpl->add_to_list(new_entry);
865 _exploded_entries->push(module_cpl);
866 log_info(class, load)("path: %s", path);
867 }
868 }
869 FREE_C_HEAP_ARRAY(char, path);
870 }
871
872 ClassPathEntry* ClassLoader::create_class_path_entry(const char *path, const struct stat* st,
873 bool throw_exception,
874 bool is_boot_append, TRAPS) {
875 JavaThread* thread = JavaThread::current();
876 ClassPathEntry* new_entry = NULL;
877 if ((st->st_mode & S_IFMT) == S_IFREG) {
878 ResourceMark rm(thread);
879 // Regular file, should be a zip or jimage file
880 // Canonicalized filename
881 char* canonical_path = NEW_RESOURCE_ARRAY_IN_THREAD(thread, char, JVM_MAXPATHLEN);
882 if (!get_canonical_path(path, canonical_path, JVM_MAXPATHLEN)) {
883 // This matches the classic VM
884 if (throw_exception) {
885 THROW_MSG_(vmSymbols::java_io_IOException(), "Bad pathname", NULL);
886 } else {
887 return NULL;
888 }
889 }
890 jint error;
891 JImageFile* jimage =(*JImageOpen)(canonical_path, &error);
892 if (jimage != NULL) {
893 new_entry = new ClassPathImageEntry(jimage, canonical_path);
894 } else {
895 char* error_msg = NULL;
896 jzfile* zip;
897 {
898 // enable call to C land
899 ThreadToNativeFromVM ttn(thread);
900 HandleMark hm(thread);
901 zip = (*ZipOpen)(canonical_path, &error_msg);
902 }
903 if (zip != NULL && error_msg == NULL) {
904 new_entry = new ClassPathZipEntry(zip, path, is_boot_append);
905 } else {
906 char *msg;
907 if (error_msg == NULL) {
908 msg = NEW_RESOURCE_ARRAY_IN_THREAD(thread, char, strlen(path) + 128); ;
909 jio_snprintf(msg, strlen(path) + 127, "error in opening JAR file %s", path);
910 } else {
911 int len = (int)(strlen(path) + strlen(error_msg) + 128);
912 msg = NEW_RESOURCE_ARRAY_IN_THREAD(thread, char, len); ;
913 jio_snprintf(msg, len - 1, "error in opening JAR file <%s> %s", error_msg, path);
914 }
915 // Don't complain about bad jar files added via -Xbootclasspath/a:.
916 if (throw_exception && is_init_completed()) {
917 THROW_MSG_(vmSymbols::java_lang_ClassNotFoundException(), msg, NULL);
918 } else {
919 return NULL;
920 }
921 }
922 }
923 log_info(class, path)("opened: %s", path);
924 log_info(class, load)("opened: %s", path);
925 } else {
926 // Directory
927 new_entry = new ClassPathDirEntry(path);
928 log_info(class, load)("path: %s", path);
929 }
930 return new_entry;
931 }
932
933
934 // Create a class path zip entry for a given path (return NULL if not found
935 // or zip/JAR file cannot be opened)
936 ClassPathZipEntry* ClassLoader::create_class_path_zip_entry(const char *path, bool is_boot_append) {
937 // check for a regular file
938 struct stat st;
939 if (os::stat(path, &st) == 0) {
940 if ((st.st_mode & S_IFMT) == S_IFREG) {
941 char canonical_path[JVM_MAXPATHLEN];
942 if (get_canonical_path(path, canonical_path, JVM_MAXPATHLEN)) {
943 char* error_msg = NULL;
944 jzfile* zip;
945 {
946 // enable call to C land
947 JavaThread* thread = JavaThread::current();
948 ThreadToNativeFromVM ttn(thread);
949 HandleMark hm(thread);
950 zip = (*ZipOpen)(canonical_path, &error_msg);
951 }
952 if (zip != NULL && error_msg == NULL) {
953 // create using canonical path
954 return new ClassPathZipEntry(zip, canonical_path, is_boot_append);
955 }
956 }
957 }
958 }
959 return NULL;
960 }
961
962 // returns true if entry already on class path
963 bool ClassLoader::contains_append_entry(const char* name) {
964 ClassPathEntry* e = _first_append_entry;
965 while (e != NULL) {
966 // assume zip entries have been canonicalized
967 if (strcmp(name, e->name()) == 0) {
968 return true;
969 }
970 e = e->next();
971 }
972 return false;
973 }
974
975 void ClassLoader::add_to_list(ClassPathEntry *new_entry) {
976 if (new_entry != NULL) {
977 if (_last_append_entry == NULL) {
978 assert(_first_append_entry == NULL, "boot loader's append class path entry list not empty");
979 _first_append_entry = _last_append_entry = new_entry;
980 } else {
981 _last_append_entry->set_next(new_entry);
982 _last_append_entry = new_entry;
983 }
984 }
985 _num_entries++;
986 }
987
988 void ClassLoader::add_to_list(const char *apath) {
989 update_class_path_entry_list((char*)apath, false, false);
990 }
991
992 // Returns true IFF the file/dir exists and the entry was successfully created.
993 bool ClassLoader::update_class_path_entry_list(const char *path,
994 bool check_for_duplicates,
995 bool is_boot_append,
996 bool throw_exception) {
997 struct stat st;
998 if (os::stat(path, &st) == 0) {
999 // File or directory found
1000 ClassPathEntry* new_entry = NULL;
1001 Thread* THREAD = Thread::current();
1002 new_entry = create_class_path_entry(path, &st, throw_exception, is_boot_append, CHECK_(false));
1003 if (new_entry == NULL) {
1004 return false;
1005 }
1006
1007 // Do not reorder the bootclasspath which would break get_system_package().
1008 // Add new entry to linked list
1009 if (!check_for_duplicates || !contains_append_entry(new_entry->name())) {
1010 ClassLoaderExt::add_class_path_entry(path, check_for_duplicates, new_entry);
1011 }
1012 return true;
1013 } else {
1014 #if INCLUDE_CDS
1015 if (DumpSharedSpaces) {
1016 _shared_paths_misc_info->add_nonexist_path(path);
1017 }
1018 #endif
1019 return false;
1020 }
1021 }
1022
1023 static void print_module_entry_table(const GrowableArray<ModuleClassPathList*>* const module_list) {
1024 ResourceMark rm;
1025 int num_of_entries = module_list->length();
1026 for (int i = 0; i < num_of_entries; i++) {
1027 ClassPathEntry* e;
1028 ModuleClassPathList* mpl = module_list->at(i);
1029 tty->print("%s=", mpl->module_name()->as_C_string());
1030 e = mpl->module_first_entry();
1031 while (e != NULL) {
1032 tty->print("%s", e->name());
1033 e = e->next();
1034 if (e != NULL) {
1035 tty->print("%s", os::path_separator());
1036 }
1037 }
1038 tty->print(" ;");
1039 }
1040 }
1041
1042 void ClassLoader::print_bootclasspath() {
1043 ClassPathEntry* e;
1044 tty->print("[bootclasspath= ");
1045
1046 // Print --patch-module module/path specifications first
1047 if (_patch_mod_entries != NULL) {
1048 print_module_entry_table(_patch_mod_entries);
1049 }
1050
1051 // [jimage | exploded modules build]
1052 if (has_jrt_entry()) {
1053 // Print the location of the java runtime image
1054 tty->print("%s ;", _jrt_entry->name());
1055 } else {
1056 // Print exploded module build path specifications
1057 if (_exploded_entries != NULL) {
1058 print_module_entry_table(_exploded_entries);
1059 }
1060 }
1061
1062 // appended entries
1063 e = _first_append_entry;
1064 while (e != NULL) {
1065 tty->print("%s ;", e->name());
1066 e = e->next();
1067 }
1068 tty->print_cr("]");
1069 }
1070
1071 void ClassLoader::load_zip_library() {
1072 assert(ZipOpen == NULL, "should not load zip library twice");
1073 // First make sure native library is loaded
1074 os::native_java_library();
1075 // Load zip library
1076 char path[JVM_MAXPATHLEN];
1077 char ebuf[1024];
1078 void* handle = NULL;
1079 if (os::dll_build_name(path, sizeof(path), Arguments::get_dll_dir(), "zip")) {
1080 handle = os::dll_load(path, ebuf, sizeof ebuf);
1081 }
1082 if (handle == NULL) {
1083 vm_exit_during_initialization("Unable to load ZIP library", path);
1084 }
1085 // Lookup zip entry points
1086 ZipOpen = CAST_TO_FN_PTR(ZipOpen_t, os::dll_lookup(handle, "ZIP_Open"));
1087 ZipClose = CAST_TO_FN_PTR(ZipClose_t, os::dll_lookup(handle, "ZIP_Close"));
1088 FindEntry = CAST_TO_FN_PTR(FindEntry_t, os::dll_lookup(handle, "ZIP_FindEntry"));
1089 ReadEntry = CAST_TO_FN_PTR(ReadEntry_t, os::dll_lookup(handle, "ZIP_ReadEntry"));
1090 GetNextEntry = CAST_TO_FN_PTR(GetNextEntry_t, os::dll_lookup(handle, "ZIP_GetNextEntry"));
1091 ZipInflateFully = CAST_TO_FN_PTR(ZipInflateFully_t, os::dll_lookup(handle, "ZIP_InflateFully"));
1092 Crc32 = CAST_TO_FN_PTR(Crc32_t, os::dll_lookup(handle, "ZIP_CRC32"));
1093 FreeEntry = CAST_TO_FN_PTR(FreeEntry_t, os::dll_lookup(handle, "ZIP_FreeEntry"));
1094
1095 // ZIP_Close is not exported on Windows in JDK5.0 so don't abort if ZIP_Close is NULL
1096 if (ZipOpen == NULL || FindEntry == NULL || ReadEntry == NULL ||
1097 GetNextEntry == NULL || Crc32 == NULL) {
1098 vm_exit_during_initialization("Corrupted ZIP library", path);
1099 }
1100
1101 if (ZipInflateFully == NULL) {
1102 vm_exit_during_initialization("Corrupted ZIP library ZIP_InflateFully missing", path);
1103 }
1104
1105 // Lookup canonicalize entry in libjava.dll
1106 void *javalib_handle = os::native_java_library();
1107 CanonicalizeEntry = CAST_TO_FN_PTR(canonicalize_fn_t, os::dll_lookup(javalib_handle, "Canonicalize"));
1108 // This lookup only works on 1.3. Do not check for non-null here
1109 }
1110
1111 void ClassLoader::load_jimage_library() {
1112 // First make sure native library is loaded
1113 os::native_java_library();
1114 // Load jimage library
1115 char path[JVM_MAXPATHLEN];
1116 char ebuf[1024];
1117 void* handle = NULL;
1118 if (os::dll_build_name(path, sizeof(path), Arguments::get_dll_dir(), "jimage")) {
1119 handle = os::dll_load(path, ebuf, sizeof ebuf);
1120 }
1121 if (handle == NULL) {
1122 vm_exit_during_initialization("Unable to load jimage library", path);
1123 }
1124
1125 // Lookup jimage entry points
1126 JImageOpen = CAST_TO_FN_PTR(JImageOpen_t, os::dll_lookup(handle, "JIMAGE_Open"));
1127 guarantee(JImageOpen != NULL, "function JIMAGE_Open not found");
1128 JImageClose = CAST_TO_FN_PTR(JImageClose_t, os::dll_lookup(handle, "JIMAGE_Close"));
1129 guarantee(JImageClose != NULL, "function JIMAGE_Close not found");
1130 JImagePackageToModule = CAST_TO_FN_PTR(JImagePackageToModule_t, os::dll_lookup(handle, "JIMAGE_PackageToModule"));
1131 guarantee(JImagePackageToModule != NULL, "function JIMAGE_PackageToModule not found");
1132 JImageFindResource = CAST_TO_FN_PTR(JImageFindResource_t, os::dll_lookup(handle, "JIMAGE_FindResource"));
1133 guarantee(JImageFindResource != NULL, "function JIMAGE_FindResource not found");
1134 JImageGetResource = CAST_TO_FN_PTR(JImageGetResource_t, os::dll_lookup(handle, "JIMAGE_GetResource"));
1135 guarantee(JImageGetResource != NULL, "function JIMAGE_GetResource not found");
1136 JImageResourceIterator = CAST_TO_FN_PTR(JImageResourceIterator_t, os::dll_lookup(handle, "JIMAGE_ResourceIterator"));
1137 guarantee(JImageResourceIterator != NULL, "function JIMAGE_ResourceIterator not found");
1138 JImageResourcePath = CAST_TO_FN_PTR(JImage_ResourcePath_t, os::dll_lookup(handle, "JIMAGE_ResourcePath"));
1139 guarantee(JImageResourcePath != NULL, "function JIMAGE_ResourcePath not found");
1140 }
1141
1142 jboolean ClassLoader::decompress(void *in, u8 inSize, void *out, u8 outSize, char **pmsg) {
1143 return (*ZipInflateFully)(in, inSize, out, outSize, pmsg);
1144 }
1145
1146 int ClassLoader::crc32(int crc, const char* buf, int len) {
1147 assert(Crc32 != NULL, "ZIP_CRC32 is not found");
1148 return (*Crc32)(crc, (const jbyte*)buf, len);
1149 }
1150
1151 #if INCLUDE_CDS
1152 void ClassLoader::initialize_module_loader_map(JImageFile* jimage) {
1153 if (!DumpSharedSpaces) {
1154 return; // only needed for CDS dump time
1155 }
1156
1157 ResourceMark rm;
1158 jlong size;
1159 JImageLocationRef location = (*JImageFindResource)(jimage, JAVA_BASE_NAME, get_jimage_version_string(), MODULE_LOADER_MAP, &size);
1160 if (location == 0) {
1161 vm_exit_during_initialization(
1162 "Cannot find ModuleLoaderMap location from modules jimage.", NULL);
1163 }
1164 char* buffer = NEW_RESOURCE_ARRAY(char, size + 1);
1165 buffer[size] = '\0';
1166 jlong read = (*JImageGetResource)(jimage, location, buffer, size);
1167 if (read != size) {
1168 vm_exit_during_initialization(
1169 "Cannot find ModuleLoaderMap resource from modules jimage.", NULL);
1170 }
1171 char* char_buf = (char*)buffer;
1172 int buflen = (int)strlen(char_buf);
1173 char* begin_ptr = char_buf;
1174 char* end_ptr = strchr(begin_ptr, '\n');
1175 bool process_boot_modules = false;
1176 _boot_modules_array = new (ResourceObj::C_HEAP, mtModule)
1177 GrowableArray<char*>(INITIAL_BOOT_MODULES_ARRAY_SIZE, true);
1178 _platform_modules_array = new (ResourceObj::C_HEAP, mtModule)
1179 GrowableArray<char*>(INITIAL_PLATFORM_MODULES_ARRAY_SIZE, true);
1180 while (end_ptr != NULL && (end_ptr - char_buf) < buflen) {
1181 // Allocate a buffer from the C heap to be appended to the _boot_modules_array
1182 // or the _platform_modules_array.
1183 char* temp_name = NEW_C_HEAP_ARRAY(char, (size_t)(end_ptr - begin_ptr + 1), mtInternal);
1184 strncpy(temp_name, begin_ptr, end_ptr - begin_ptr);
1185 temp_name[end_ptr - begin_ptr] = '\0';
1186 if (strncmp(temp_name, "BOOT", 4) == 0) {
1187 process_boot_modules = true;
1188 FREE_C_HEAP_ARRAY(char, temp_name);
1189 } else if (strncmp(temp_name, "PLATFORM", 8) == 0) {
1190 process_boot_modules = false;
1191 FREE_C_HEAP_ARRAY(char, temp_name);
1192 } else {
1193 // module name
1194 if (process_boot_modules) {
1195 _boot_modules_array->append(temp_name);
1196 } else {
1197 _platform_modules_array->append(temp_name);
1198 }
1199 }
1200 begin_ptr = ++end_ptr;
1201 end_ptr = strchr(begin_ptr, '\n');
1202 }
1203 }
1204 #endif
1205
1206 // Function add_package extracts the package from the fully qualified class name
1207 // and checks if the package is in the boot loader's package entry table. If so,
1208 // then it sets the classpath_index in the package entry record.
1209 //
1210 // The classpath_index field is used to find the entry on the boot loader class
1211 // path for packages with classes loaded by the boot loader from -Xbootclasspath/a
1212 // in an unnamed module. It is also used to indicate (for all packages whose
1213 // classes are loaded by the boot loader) that at least one of the package's
1214 // classes has been loaded.
1215 bool ClassLoader::add_package(const char *fullq_class_name, s2 classpath_index, TRAPS) {
1216 assert(fullq_class_name != NULL, "just checking");
1217
1218 // Get package name from fully qualified class name.
1219 ResourceMark rm;
1220 const char *cp = package_from_name(fullq_class_name);
1221 if (cp != NULL) {
1222 PackageEntryTable* pkg_entry_tbl = ClassLoaderData::the_null_class_loader_data()->packages();
1223 TempNewSymbol pkg_symbol = SymbolTable::new_symbol(cp, CHECK_false);
1224 PackageEntry* pkg_entry = pkg_entry_tbl->lookup_only(pkg_symbol);
1225 if (pkg_entry != NULL) {
1226 assert(classpath_index != -1, "Unexpected classpath_index");
1227 pkg_entry->set_classpath_index(classpath_index);
1228 } else {
1229 return false;
1230 }
1231 }
1232 return true;
1233 }
1234
1235 oop ClassLoader::get_system_package(const char* name, TRAPS) {
1236 // Look up the name in the boot loader's package entry table.
1237 if (name != NULL) {
1238 TempNewSymbol package_sym = SymbolTable::new_symbol(name, (int)strlen(name), CHECK_NULL);
1239 // Look for the package entry in the boot loader's package entry table.
1240 PackageEntry* package =
1241 ClassLoaderData::the_null_class_loader_data()->packages()->lookup_only(package_sym);
1242
1243 // Return NULL if package does not exist or if no classes in that package
1244 // have been loaded.
1245 if (package != NULL && package->has_loaded_class()) {
1246 ModuleEntry* module = package->module();
1247 if (module->location() != NULL) {
1248 ResourceMark rm(THREAD);
1249 Handle ml = java_lang_String::create_from_str(
1250 module->location()->as_C_string(), THREAD);
1251 return ml();
1252 }
1253 // Return entry on boot loader class path.
1254 Handle cph = java_lang_String::create_from_str(
1255 ClassLoader::classpath_entry(package->classpath_index())->name(), THREAD);
1256 return cph();
1257 }
1258 }
1259 return NULL;
1260 }
1261
1262 objArrayOop ClassLoader::get_system_packages(TRAPS) {
1263 ResourceMark rm(THREAD);
1264 // List of pointers to PackageEntrys that have loaded classes.
1265 GrowableArray<PackageEntry*>* loaded_class_pkgs = new GrowableArray<PackageEntry*>(50);
1266 {
1267 MutexLocker ml(Module_lock, THREAD);
1268
1269 PackageEntryTable* pe_table =
1270 ClassLoaderData::the_null_class_loader_data()->packages();
1271
1272 // Collect the packages that have at least one loaded class.
1273 for (int x = 0; x < pe_table->table_size(); x++) {
1274 for (PackageEntry* package_entry = pe_table->bucket(x);
1275 package_entry != NULL;
1276 package_entry = package_entry->next()) {
1277 if (package_entry->has_loaded_class()) {
1278 loaded_class_pkgs->append(package_entry);
1279 }
1280 }
1281 }
1282 }
1283
1284
1285 // Allocate objArray and fill with java.lang.String
1286 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
1287 loaded_class_pkgs->length(), CHECK_NULL);
1288 objArrayHandle result(THREAD, r);
1289 for (int x = 0; x < loaded_class_pkgs->length(); x++) {
1290 PackageEntry* package_entry = loaded_class_pkgs->at(x);
1291 Handle str = java_lang_String::create_from_symbol(package_entry->name(), CHECK_NULL);
1292 result->obj_at_put(x, str());
1293 }
1294 return result();
1295 }
1296
1297 #if INCLUDE_CDS
1298 s2 ClassLoader::module_to_classloader(const char* module_name) {
1299
1300 assert(DumpSharedSpaces, "dump time only");
1301 assert(_boot_modules_array != NULL, "_boot_modules_array is NULL");
1302 assert(_platform_modules_array != NULL, "_platform_modules_array is NULL");
1303
1304 int array_size = _boot_modules_array->length();
1305 for (int i = 0; i < array_size; i++) {
1306 if (strcmp(module_name, _boot_modules_array->at(i)) == 0) {
1307 return BOOT_LOADER;
1308 }
1309 }
1310
1311 array_size = _platform_modules_array->length();
1312 for (int i = 0; i < array_size; i++) {
1313 if (strcmp(module_name, _platform_modules_array->at(i)) == 0) {
1314 return PLATFORM_LOADER;
1315 }
1316 }
1317
1318 return APP_LOADER;
1319 }
1320
1321 s2 ClassLoader::classloader_type(Symbol* class_name, ClassPathEntry* e, int classpath_index, TRAPS) {
1322 assert(DumpSharedSpaces, "Only used for CDS dump time");
1323
1324 // obtain the classloader type based on the class name.
1325 // First obtain the package name based on the class name. Then obtain
1326 // the classloader type based on the package name from the jimage using
1327 // a jimage API. If the classloader type cannot be found from the
1328 // jimage, it is determined by the class path entry.
1329 jshort loader_type = ClassLoader::APP_LOADER;
1330 if (e->is_jrt()) {
1331 ResourceMark rm;
1332 TempNewSymbol pkg_name = InstanceKlass::package_from_name(class_name, CHECK_0);
1333 if (pkg_name != NULL) {
1334 const char* pkg_name_C_string = (const char*)(pkg_name->as_C_string());
1335 ClassPathImageEntry* cpie = (ClassPathImageEntry*)e;
1336 JImageFile* jimage = cpie->jimage();
1337 char* module_name = (char*)(*JImagePackageToModule)(jimage, pkg_name_C_string);
1338 if (module_name != NULL) {
1339 loader_type = ClassLoader::module_to_classloader(module_name);
1340 }
1341 }
1342 } else if (ClassLoaderExt::is_boot_classpath(classpath_index)) {
1343 loader_type = ClassLoader::BOOT_LOADER;
1344 }
1345 return loader_type;
1346 }
1347 #endif
1348
1349 // caller needs ResourceMark
1350 const char* ClassLoader::file_name_for_class_name(const char* class_name,
1351 int class_name_len) {
1352 assert(class_name != NULL, "invariant");
1353 assert((int)strlen(class_name) == class_name_len, "invariant");
1354
1355 static const char class_suffix[] = ".class";
1356
1357 char* const file_name = NEW_RESOURCE_ARRAY(char,
1358 class_name_len +
1359 sizeof(class_suffix)); // includes term NULL
1360
1361 strncpy(file_name, class_name, class_name_len);
1362 strncpy(&file_name[class_name_len], class_suffix, sizeof(class_suffix));
1363
1364 return file_name;
1365 }
1366
1367 // Search either the patch-module or exploded build entries for class
1368 ClassFileStream* ClassLoader::search_module_entries(const GrowableArray<ModuleClassPathList*>* const module_list,
1369 const char* const class_name, const char* const file_name, TRAPS) {
1370 ClassFileStream* stream = NULL;
1371
1372 // Find the class' defining module in the boot loader's module entry table
1373 PackageEntry* pkg_entry = get_package_entry(class_name, ClassLoaderData::the_null_class_loader_data(), CHECK_NULL);
1374 ModuleEntry* mod_entry = (pkg_entry != NULL) ? pkg_entry->module() : NULL;
1375
1376 // If the module system has not defined java.base yet, then
1377 // classes loaded are assumed to be defined to java.base.
1378 // When java.base is eventually defined by the module system,
1379 // all packages of classes that have been previously loaded
1380 // are verified in ModuleEntryTable::verify_javabase_packages().
1381 if (!Universe::is_module_initialized() &&
1382 !ModuleEntryTable::javabase_defined() &&
1383 mod_entry == NULL) {
1384 mod_entry = ModuleEntryTable::javabase_moduleEntry();
1385 }
1386
1387 // The module must be a named module
1388 if (mod_entry != NULL && mod_entry->is_named()) {
1389 int num_of_entries = module_list->length();
1390 const Symbol* class_module_name = mod_entry->name();
1391
1392 // Loop through all the modules in either the patch-module or exploded entries looking for module
1393 for (int i = 0; i < num_of_entries; i++) {
1394 ModuleClassPathList* module_cpl = module_list->at(i);
1395 Symbol* module_cpl_name = module_cpl->module_name();
1396
1397 if (module_cpl_name->fast_compare(class_module_name) == 0) {
1398 // Class' module has been located, attempt to load
1399 // the class from the module's ClassPathEntry list.
1400 ClassPathEntry* e = module_cpl->module_first_entry();
1401 while (e != NULL) {
1402 stream = e->open_stream(file_name, CHECK_NULL);
1403 // No context.check is required since CDS is not supported
1404 // for an exploded modules build or if --patch-module is specified.
1405 if (NULL != stream) {
1406 return stream;
1407 }
1408 e = e->next();
1409 }
1410 // If the module was located, break out even if the class was not
1411 // located successfully from that module's ClassPathEntry list.
1412 // There will not be another valid entry for that module.
1413 return NULL;
1414 }
1415 }
1416 }
1417
1418 return NULL;
1419 }
1420
1421 #if INCLUDE_CDS
1422 // The following function is only used during CDS dump time.
1423 // It checks if a class can be found in the jar entries of the _patch_mod_entries.
1424 // It does not support non-jar entries.
1425 bool ClassLoader::is_in_patch_module(const char* const file_name) {
1426 assert(DumpSharedSpaces, "dump time only");
1427 if (_patch_mod_entries == NULL) {
1428 return false;
1429 }
1430
1431 int num_of_entries = _patch_mod_entries->length();
1432 char* class_module_name = NULL;
1433 ResourceMark rm;
1434 const char *pkg_name = package_from_name(file_name);
1435 // Using the jimage to obtain the class' module name.
1436 // The ModuleEntryTable cannot be used at this point during dump time
1437 // because the module system hasn't been initialized yet.
1438 if (pkg_name != NULL) {
1439 JImageFile *jimage = _jrt_entry->jimage();
1440 class_module_name = (char*)(*JImagePackageToModule)(jimage, pkg_name);
1441 }
1442
1443 if (class_module_name == NULL) {
1444 return false;
1445 }
1446
1447 // Loop through all the patch module entries looking for module
1448 for (int i = 0; i < num_of_entries; i++) {
1449 ModuleClassPathList* module_cpl = _patch_mod_entries->at(i);
1450 Symbol* module_cpl_name = module_cpl->module_name();
1451
1452 if (strcmp(module_cpl_name->as_C_string(), class_module_name) == 0) {
1453 // Class' module has been located, attempt to locate
1454 // the class from the module's ClassPathEntry list.
1455 ClassPathEntry* e = module_cpl->module_first_entry();
1456 while (e != NULL) {
1457 if (e->is_jar_file()) {
1458 if (e->stream_exists(file_name)) {
1459 return true;
1460 } else {
1461 e = e->next();
1462 }
1463 }
1464 }
1465 }
1466 }
1467
1468 return false;
1469 }
1470 #endif // INCLUDE_CDS
1471
1472 instanceKlassHandle ClassLoader::load_class(Symbol* name, bool search_append_only, TRAPS) {
1473 assert(name != NULL, "invariant");
1474 assert(THREAD->is_Java_thread(), "must be a JavaThread");
1475
1476 ResourceMark rm(THREAD);
1477 HandleMark hm(THREAD);
1478
1479 const char* const class_name = name->as_C_string();
1480
1481 EventMark m("loading class %s", class_name);
1482 ThreadProfilerMark tpm(ThreadProfilerMark::classLoaderRegion);
1483
1484 const char* const file_name = file_name_for_class_name(class_name,
1485 name->utf8_length());
1486 assert(file_name != NULL, "invariant");
1487
1488 ClassLoaderExt::Context context(class_name, file_name, THREAD);
1489
1490 // Lookup stream for parsing .class file
1491 ClassFileStream* stream = NULL;
1492 s2 classpath_index = 0;
1493 ClassPathEntry* e = NULL;
1494
1495 // If DumpSharedSpaces is true boot loader visibility boundaries are set to:
1496 // - [jimage] + [_first_append_entry to _last_append_entry] (all path entries).
1497 // If a class is found in the --patch-module entries, the class will not be included in the
1498 // CDS archive. Also, CDS is not supported if exploded module builds are used.
1499 //
1500 // If search_append_only is true, boot loader visibility boundaries are
1501 // set to be _first_append_entry to the end. This includes:
1502 // [-Xbootclasspath/a]; [jvmti appended entries]
1503 //
1504 // If both DumpSharedSpaces and search_append_only are false, boot loader
1505 // visibility boundaries are set to be the --patch-module entries plus the base piece.
1506 // This would include:
1507 // [--patch-module=<module>=<file>(<pathsep><file>)*]; [jimage | exploded module build]
1508 //
1509 // DumpSharedSpaces and search_append_only are mutually exclusive and cannot
1510 // be true at the same time.
1511 assert(!(DumpSharedSpaces && search_append_only), "DumpSharedSpaces and search_append_only are both true");
1512
1513 // Load Attempt #1: --patch-module
1514 // Determine the class' defining module. If it appears in the _patch_mod_entries,
1515 // attempt to load the class from those locations specific to the module.
1516 // Specifications to --patch-module can contain a partial number of classes
1517 // that are part of the overall module definition. So if a particular class is not
1518 // found within its module specification, the search should continue to Load Attempt #2.
1519 // Note: The --patch-module entries are never searched if the boot loader's
1520 // visibility boundary is limited to only searching the append entries.
1521 if (_patch_mod_entries != NULL && !search_append_only) {
1522 if (!DumpSharedSpaces) {
1523 stream = search_module_entries(_patch_mod_entries, class_name, file_name, CHECK_NULL);
1524 } else {
1525 #if INCLUDE_CDS
1526 if (is_in_patch_module(file_name)) {
1527 tty->print_cr("Preload Warning: Skip archiving class %s found in --patch-module entry", class_name);
1528 return NULL;
1529 }
1530 #endif
1531 }
1532 }
1533
1534 // Load Attempt #2: [jimage | exploded build]
1535 if (!search_append_only && (NULL == stream)) {
1536 if (has_jrt_entry()) {
1537 e = _jrt_entry;
1538 stream = _jrt_entry->open_stream(file_name, CHECK_NULL);
1539 if (!context.check(stream, classpath_index)) {
1540 return NULL;
1541 }
1542 } else {
1543 // Exploded build - attempt to locate class in its defining module's location.
1544 assert(_exploded_entries != NULL, "No exploded build entries present");
1545 stream = search_module_entries(_exploded_entries, class_name, file_name, CHECK_NULL);
1546 }
1547 }
1548
1549 // Load Attempt #3: [-Xbootclasspath/a]; [jvmti appended entries]
1550 if ((search_append_only || DumpSharedSpaces) && (NULL == stream)) {
1551 // For the boot loader append path search, the starting classpath_index
1552 // for the appended piece is always 1 to account for either the
1553 // _jrt_entry or the _exploded_entries.
1554 assert(classpath_index == 0, "The classpath_index has been incremented incorrectly");
1555 classpath_index = 1;
1556
1557 e = _first_append_entry;
1558 while (e != NULL) {
1559 stream = e->open_stream(file_name, CHECK_NULL);
1560 if (!context.check(stream, classpath_index)) {
1561 return NULL;
1562 }
1563 if (NULL != stream) {
1564 break;
1565 }
1566 e = e->next();
1567 ++classpath_index;
1568 }
1569 }
1570
1571 if (NULL == stream) {
1572 if (DumpSharedSpaces) {
1573 tty->print_cr("Preload Warning: Cannot find %s", class_name);
1574 }
1575 return NULL;
1576 }
1577
1578 stream->set_verify(context.should_verify(classpath_index));
1579
1580 ClassLoaderData* loader_data = ClassLoaderData::the_null_class_loader_data();
1581 Handle protection_domain;
1582
1583 instanceKlassHandle result = KlassFactory::create_from_stream(stream,
1584 name,
1585 loader_data,
1586 protection_domain,
1587 NULL, // host_klass
1588 NULL, // cp_patches
1589 THREAD);
1590 if (HAS_PENDING_EXCEPTION) {
1591 if (DumpSharedSpaces) {
1592 tty->print_cr("Preload Error: Failed to load %s", class_name);
1593 }
1594 return NULL;
1595 }
1596
1597 return context.record_result(name, e, classpath_index, result, THREAD);
1598 }
1599
1600 // Initialize the class loader's access to methods in libzip. Parse and
1601 // process the boot classpath into a list ClassPathEntry objects. Once
1602 // this list has been created, it must not change order (see class PackageInfo)
1603 // it can be appended to and is by jvmti and the kernel vm.
1604
1605 void ClassLoader::initialize() {
1606 EXCEPTION_MARK;
1607
1608 if (UsePerfData) {
1609 // jvmstat performance counters
1610 NEWPERFTICKCOUNTER(_perf_accumulated_time, SUN_CLS, "time");
1611 NEWPERFTICKCOUNTER(_perf_class_init_time, SUN_CLS, "classInitTime");
1612 NEWPERFTICKCOUNTER(_perf_class_init_selftime, SUN_CLS, "classInitTime.self");
1613 NEWPERFTICKCOUNTER(_perf_class_verify_time, SUN_CLS, "classVerifyTime");
1614 NEWPERFTICKCOUNTER(_perf_class_verify_selftime, SUN_CLS, "classVerifyTime.self");
1615 NEWPERFTICKCOUNTER(_perf_class_link_time, SUN_CLS, "classLinkedTime");
1616 NEWPERFTICKCOUNTER(_perf_class_link_selftime, SUN_CLS, "classLinkedTime.self");
1617 NEWPERFEVENTCOUNTER(_perf_classes_inited, SUN_CLS, "initializedClasses");
1618 NEWPERFEVENTCOUNTER(_perf_classes_linked, SUN_CLS, "linkedClasses");
1619 NEWPERFEVENTCOUNTER(_perf_classes_verified, SUN_CLS, "verifiedClasses");
1620
1621 NEWPERFTICKCOUNTER(_perf_class_parse_time, SUN_CLS, "parseClassTime");
1622 NEWPERFTICKCOUNTER(_perf_class_parse_selftime, SUN_CLS, "parseClassTime.self");
1623 NEWPERFTICKCOUNTER(_perf_sys_class_lookup_time, SUN_CLS, "lookupSysClassTime");
1624 NEWPERFTICKCOUNTER(_perf_shared_classload_time, SUN_CLS, "sharedClassLoadTime");
1625 NEWPERFTICKCOUNTER(_perf_sys_classload_time, SUN_CLS, "sysClassLoadTime");
1626 NEWPERFTICKCOUNTER(_perf_app_classload_time, SUN_CLS, "appClassLoadTime");
1627 NEWPERFTICKCOUNTER(_perf_app_classload_selftime, SUN_CLS, "appClassLoadTime.self");
1628 NEWPERFEVENTCOUNTER(_perf_app_classload_count, SUN_CLS, "appClassLoadCount");
1629 NEWPERFTICKCOUNTER(_perf_define_appclasses, SUN_CLS, "defineAppClasses");
1630 NEWPERFTICKCOUNTER(_perf_define_appclass_time, SUN_CLS, "defineAppClassTime");
1631 NEWPERFTICKCOUNTER(_perf_define_appclass_selftime, SUN_CLS, "defineAppClassTime.self");
1632 NEWPERFBYTECOUNTER(_perf_app_classfile_bytes_read, SUN_CLS, "appClassBytes");
1633 NEWPERFBYTECOUNTER(_perf_sys_classfile_bytes_read, SUN_CLS, "sysClassBytes");
1634
1635
1636 // The following performance counters are added for measuring the impact
1637 // of the bug fix of 6365597. They are mainly focused on finding out
1638 // the behavior of system & user-defined classloader lock, whether
1639 // ClassLoader.loadClass/findClass is being called synchronized or not.
1640 // Also two additional counters are created to see whether 'UnsyncloadClass'
1641 // flag is being set or not and how many times load_instance_class call
1642 // fails with linkageError etc.
1643 NEWPERFEVENTCOUNTER(_sync_systemLoaderLockContentionRate, SUN_CLS,
1644 "systemLoaderLockContentionRate");
1645 NEWPERFEVENTCOUNTER(_sync_nonSystemLoaderLockContentionRate, SUN_CLS,
1646 "nonSystemLoaderLockContentionRate");
1647 NEWPERFEVENTCOUNTER(_sync_JVMFindLoadedClassLockFreeCounter, SUN_CLS,
1648 "jvmFindLoadedClassNoLockCalls");
1649 NEWPERFEVENTCOUNTER(_sync_JVMDefineClassLockFreeCounter, SUN_CLS,
1650 "jvmDefineClassNoLockCalls");
1651
1652 NEWPERFEVENTCOUNTER(_sync_JNIDefineClassLockFreeCounter, SUN_CLS,
1653 "jniDefineClassNoLockCalls");
1654
1655 NEWPERFEVENTCOUNTER(_unsafe_defineClassCallCounter, SUN_CLS,
1656 "unsafeDefineClassCalls");
1657
1658 NEWPERFEVENTCOUNTER(_isUnsyncloadClass, SUN_CLS, "isUnsyncloadClassSet");
1659 NEWPERFEVENTCOUNTER(_load_instance_class_failCounter, SUN_CLS,
1660 "loadInstanceClassFailRate");
1661
1662 // increment the isUnsyncloadClass counter if UnsyncloadClass is set.
1663 if (UnsyncloadClass) {
1664 _isUnsyncloadClass->inc();
1665 }
1666 }
1667
1668 // lookup zip library entry points
1669 load_zip_library();
1670 // lookup jimage library entry points
1671 load_jimage_library();
1672 #if INCLUDE_CDS
1673 // initialize search path
1674 if (DumpSharedSpaces) {
1675 _shared_paths_misc_info = SharedClassUtil::allocate_shared_paths_misc_info();
1676 }
1677 #endif
1678 setup_bootstrap_search_path();
1679 }
1680
1681 #if INCLUDE_CDS
1682 // Capture all the --patch-module entries specified during CDS dump time.
1683 // It also captures the non-existing path(s) and the required file(s) during inspecting
1684 // the entries.
1685 void ClassLoader::setup_patch_mod_path() {
1686 assert(DumpSharedSpaces, "only used with -Xshare:dump");
1687 ResourceMark rm;
1688 GrowableArray<ModulePatchPath*>* patch_mod_args = Arguments::get_patch_mod_prefix();
1689 if (patch_mod_args != NULL) {
1690 int num_of_entries = patch_mod_args->length();
1691 for (int i = 0; i < num_of_entries; i++) {
1692 const char* module_name = (patch_mod_args->at(i))->module_name();
1693 const char* module_path = (patch_mod_args->at(i))->path_string();
1694 int path_len = (int)strlen(module_path);
1695 int name_len = (int)strlen(module_name);
1696 int buf_len = name_len + path_len + 2; // add 2 for the '=' and NULL terminator
1697 int end = 0;
1698 char* buf = NEW_C_HEAP_ARRAY(char, buf_len, mtInternal);
1699 // Iterate over the module's class path entries
1700 for (int start = 0; start < path_len; start = end) {
1701 while (module_path[end] && module_path[end] != os::path_separator()[0]) {
1702 end++;
1703 }
1704 strncpy(buf, &module_path[start], end - start);
1705 buf[end - start] = '\0';
1706 struct stat st;
1707 if (os::stat(buf, &st) != 0) {
1708 // File not found
1709 _shared_paths_misc_info->add_nonexist_path(buf);
1710 } else {
1711 if ((st.st_mode & S_IFMT) != S_IFREG) { // is not a regular file
1712 vm_exit_during_initialization(
1713 "--patch-module requires a regular file during dumping", buf);
1714 } else {
1715 _shared_paths_misc_info->add_required_file(buf);
1716 }
1717 }
1718 while (module_path[end] == os::path_separator()[0]) {
1719 end++;
1720 }
1721 };
1722 jio_snprintf(buf, buf_len, "%s=%s", module_name, module_path);
1723 _shared_paths_misc_info->add_patch_mod_classpath((const char*)buf);
1724 _num_patch_mod_prefixes++;
1725 FREE_C_HEAP_ARRAY(char, buf);
1726 }
1727 }
1728 }
1729
1730 void ClassLoader::initialize_shared_path() {
1731 if (DumpSharedSpaces) {
1732 setup_patch_mod_path();
1733 ClassLoaderExt::setup_search_paths();
1734 _shared_paths_misc_info->write_jint(0); // see comments in SharedPathsMiscInfo::check()
1735 }
1736 }
1737 #endif
1738
1739 jlong ClassLoader::classloader_time_ms() {
1740 return UsePerfData ?
1741 Management::ticks_to_ms(_perf_accumulated_time->get_value()) : -1;
1742 }
1743
1744 jlong ClassLoader::class_init_count() {
1745 return UsePerfData ? _perf_classes_inited->get_value() : -1;
1746 }
1747
1748 jlong ClassLoader::class_init_time_ms() {
1749 return UsePerfData ?
1750 Management::ticks_to_ms(_perf_class_init_time->get_value()) : -1;
1751 }
1752
1753 jlong ClassLoader::class_verify_time_ms() {
1754 return UsePerfData ?
1755 Management::ticks_to_ms(_perf_class_verify_time->get_value()) : -1;
1756 }
1757
1758 jlong ClassLoader::class_link_count() {
1759 return UsePerfData ? _perf_classes_linked->get_value() : -1;
1760 }
1761
1762 jlong ClassLoader::class_link_time_ms() {
1763 return UsePerfData ?
1764 Management::ticks_to_ms(_perf_class_link_time->get_value()) : -1;
1765 }
1766
1767 int ClassLoader::compute_Object_vtable() {
1768 // hardwired for JDK1.2 -- would need to duplicate class file parsing
1769 // code to determine actual value from file
1770 // Would be value '11' if finals were in vtable
1771 int JDK_1_2_Object_vtable_size = 5;
1772 return JDK_1_2_Object_vtable_size * vtableEntry::size();
1773 }
1774
1775
1776 void classLoader_init1() {
1777 ClassLoader::initialize();
1778 }
1779
1780 // Complete the ClassPathEntry setup for the boot loader
1781 void ClassLoader::classLoader_init2(TRAPS) {
1782 // Setup the list of module/path pairs for --patch-module processing
1783 // This must be done after the SymbolTable is created in order
1784 // to use fast_compare on module names instead of a string compare.
1785 if (Arguments::get_patch_mod_prefix() != NULL) {
1786 setup_patch_mod_entries();
1787 }
1788
1789 // Create the ModuleEntry for java.base (must occur after setup_patch_mod_entries
1790 // to successfully determine if java.base has been patched)
1791 create_javabase();
1792
1793 // Setup the initial java.base/path pair for the exploded build entries.
1794 // As more modules are defined during module system initialization, more
1795 // entries will be added to the exploded build array.
1796 if (!has_jrt_entry()) {
1797 assert(!DumpSharedSpaces, "DumpSharedSpaces not supported with exploded module builds");
1798 assert(!UseSharedSpaces, "UsedSharedSpaces not supported with exploded module builds");
1799 add_to_exploded_build_list(vmSymbols::java_base(), CHECK);
1800 }
1801 }
1802
1803
1804 bool ClassLoader::get_canonical_path(const char* orig, char* out, int len) {
1805 assert(orig != NULL && out != NULL && len > 0, "bad arguments");
1806 if (CanonicalizeEntry != NULL) {
1807 JavaThread* THREAD = JavaThread::current();
1808 JNIEnv* env = THREAD->jni_environment();
1809 ResourceMark rm(THREAD);
1810
1811 // os::native_path writes into orig_copy
1812 char* orig_copy = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, strlen(orig)+1);
1813 strcpy(orig_copy, orig);
1814 if ((CanonicalizeEntry)(env, os::native_path(orig_copy), out, len) < 0) {
1815 return false;
1816 }
1817 } else {
1818 // On JDK 1.2.2 the Canonicalize does not exist, so just do nothing
1819 strncpy(out, orig, len);
1820 out[len - 1] = '\0';
1821 }
1822 return true;
1823 }
1824
1825 void ClassLoader::create_javabase() {
1826 Thread* THREAD = Thread::current();
1827
1828 // Create java.base's module entry for the boot
1829 // class loader prior to loading j.l.Ojbect.
1830 ClassLoaderData* null_cld = ClassLoaderData::the_null_class_loader_data();
1831
1832 // Get module entry table
1833 ModuleEntryTable* null_cld_modules = null_cld->modules();
1834 if (null_cld_modules == NULL) {
1835 vm_exit_during_initialization("No ModuleEntryTable for the boot class loader");
1836 }
1837
1838 {
1839 MutexLocker ml(Module_lock, THREAD);
1840 ModuleEntry* jb_module = null_cld_modules->locked_create_entry_or_null(Handle(NULL), vmSymbols::java_base(), NULL, NULL, null_cld);
1841 if (jb_module == NULL) {
1842 vm_exit_during_initialization("Unable to create ModuleEntry for " JAVA_BASE_NAME);
1843 }
1844 ModuleEntryTable::set_javabase_moduleEntry(jb_module);
1845 }
1846 }
1847
1848 #ifndef PRODUCT
1849
1850 // CompileTheWorld
1851 //
1852 // Iterates over all class path entries and forces compilation of all methods
1853 // in all classes found. Currently, only zip/jar archives are searched.
1854 //
1855 // The classes are loaded by the Java level bootstrap class loader, and the
1856 // initializer is called. If DelayCompilationDuringStartup is true (default),
1857 // the interpreter will run the initialization code. Note that forcing
1858 // initialization in this way could potentially lead to initialization order
1859 // problems, in which case we could just force the initialization bit to be set.
1860
1861
1862 // We need to iterate over the contents of a zip/jar file, so we replicate the
1863 // jzcell and jzfile definitions from zip_util.h but rename jzfile to real_jzfile,
1864 // since jzfile already has a void* definition.
1865 //
1866 // Note that this is only used in debug mode.
1867 //
1868 // HotSpot integration note:
1869 // Matches zip_util.h 1.14 99/06/01 from jdk1.3 beta H build
1870
1871
1872 // JDK 1.3 version
1873 typedef struct real_jzentry { /* Zip file entry */
1874 char *name; /* entry name */
1875 jint time; /* modification time */
1876 jint size; /* size of uncompressed data */
1877 jint csize; /* size of compressed data (zero if uncompressed) */
1878 jint crc; /* crc of uncompressed data */
1879 char *comment; /* optional zip file comment */
1880 jbyte *extra; /* optional extra data */
1881 jint pos; /* position of LOC header (if negative) or data */
1882 } real_jzentry;
1883
1884 typedef struct real_jzfile { /* Zip file */
1885 char *name; /* zip file name */
1886 jint refs; /* number of active references */
1887 jint fd; /* open file descriptor */
1888 void *lock; /* read lock */
1889 char *comment; /* zip file comment */
1890 char *msg; /* zip error message */
1891 void *entries; /* array of hash cells */
1892 jint total; /* total number of entries */
1893 unsigned short *table; /* Hash chain heads: indexes into entries */
1894 jint tablelen; /* number of hash eads */
1895 real_jzfile *next; /* next zip file in search list */
1896 jzentry *cache; /* we cache the most recently freed jzentry */
1897 /* Information on metadata names in META-INF directory */
1898 char **metanames; /* array of meta names (may have null names) */
1899 jint metacount; /* number of slots in metanames array */
1900 /* If there are any per-entry comments, they are in the comments array */
1901 char **comments;
1902 } real_jzfile;
1903
1904 void ClassPathDirEntry::compile_the_world(Handle loader, TRAPS) {
1905 // For now we only compile all methods in all classes in zip/jar files
1906 tty->print_cr("CompileTheWorld : Skipped classes in %s", _dir);
1907 tty->cr();
1908 }
1909
1910 void ClassPathZipEntry::compile_the_world(Handle loader, TRAPS) {
1911 real_jzfile* zip = (real_jzfile*) _zip;
1912 tty->print_cr("CompileTheWorld : Compiling all classes in %s", zip->name);
1913 tty->cr();
1914 // Iterate over all entries in zip file
1915 for (int n = 0; ; n++) {
1916 real_jzentry * ze = (real_jzentry *)((*GetNextEntry)(_zip, n));
1917 if (ze == NULL) break;
1918 ClassLoader::compile_the_world_in(ze->name, loader, CHECK);
1919 }
1920 if (HAS_PENDING_EXCEPTION) {
1921 if (PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())) {
1922 CLEAR_PENDING_EXCEPTION;
1923 tty->print_cr("\nCompileTheWorld : Ran out of memory\n");
1924 tty->print_cr("Increase class metadata storage if a limit was set");
1925 } else {
1926 tty->print_cr("\nCompileTheWorld : Unexpected exception occurred\n");
1927 }
1928 }
1929 }
1930
1931 void ClassLoader::compile_the_world() {
1932 EXCEPTION_MARK;
1933 HandleMark hm(THREAD);
1934 ResourceMark rm(THREAD);
1935
1936 assert(has_jrt_entry(), "Compile The World not supported with exploded module build");
1937
1938 // Find bootstrap loader
1939 Handle system_class_loader (THREAD, SystemDictionary::java_system_loader());
1940 jlong start = os::javaTimeMillis();
1941
1942 // Compile the world for the modular java runtime image
1943 _jrt_entry->compile_the_world(system_class_loader, CATCH);
1944
1945 // Iterate over all bootstrap class path appended entries
1946 ClassPathEntry* e = _first_append_entry;
1947 while (e != NULL) {
1948 assert(!e->is_jrt(), "A modular java runtime image is present on the list of appended entries");
1949 e->compile_the_world(system_class_loader, CATCH);
1950 e = e->next();
1951 }
1952 jlong end = os::javaTimeMillis();
1953 tty->print_cr("CompileTheWorld : Done (%d classes, %d methods, " JLONG_FORMAT " ms)",
1954 _compile_the_world_class_counter, _compile_the_world_method_counter, (end - start));
1955 {
1956 // Print statistics as if before normal exit:
1957 extern void print_statistics();
1958 print_statistics();
1959 }
1960 vm_exit(0);
1961 }
1962
1963 int ClassLoader::_compile_the_world_class_counter = 0;
1964 int ClassLoader::_compile_the_world_method_counter = 0;
1965 static int _codecache_sweep_counter = 0;
1966
1967 // Filter out all exceptions except OOMs
1968 static void clear_pending_exception_if_not_oom(TRAPS) {
1969 if (HAS_PENDING_EXCEPTION &&
1970 !PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())) {
1971 CLEAR_PENDING_EXCEPTION;
1972 }
1973 // The CHECK at the caller will propagate the exception out
1974 }
1975
1976 /**
1977 * Returns if the given method should be compiled when doing compile-the-world.
1978 *
1979 * TODO: This should be a private method in a CompileTheWorld class.
1980 */
1981 static bool can_be_compiled(methodHandle m, int comp_level) {
1982 assert(CompileTheWorld, "must be");
1983
1984 // It's not valid to compile a native wrapper for MethodHandle methods
1985 // that take a MemberName appendix since the bytecode signature is not
1986 // correct.
1987 vmIntrinsics::ID iid = m->intrinsic_id();
1988 if (MethodHandles::is_signature_polymorphic(iid) && MethodHandles::has_member_arg(iid)) {
1989 return false;
1990 }
1991
1992 return CompilationPolicy::can_be_compiled(m, comp_level);
1993 }
1994
1995 void ClassLoader::compile_the_world_in(char* name, Handle loader, TRAPS) {
1996 if (string_ends_with(name, ".class")) {
1997 // We have a .class file
1998 int len = (int)strlen(name);
1999 char buffer[2048];
2000 strncpy(buffer, name, len - 6);
2001 buffer[len-6] = 0;
2002 // If the file has a period after removing .class, it's not really a
2003 // valid class file. The class loader will check everything else.
2004 if (strchr(buffer, '.') == NULL) {
2005 _compile_the_world_class_counter++;
2006 if (_compile_the_world_class_counter > CompileTheWorldStopAt) return;
2007
2008 // Construct name without extension
2009 TempNewSymbol sym = SymbolTable::new_symbol(buffer, CHECK);
2010 // Use loader to load and initialize class
2011 Klass* ik = SystemDictionary::resolve_or_null(sym, loader, Handle(), THREAD);
2012 instanceKlassHandle k (THREAD, ik);
2013 if (k.not_null() && !HAS_PENDING_EXCEPTION) {
2014 k->initialize(THREAD);
2015 }
2016 bool exception_occurred = HAS_PENDING_EXCEPTION;
2017 clear_pending_exception_if_not_oom(CHECK);
2018 if (CompileTheWorldPreloadClasses && k.not_null()) {
2019 ConstantPool::preload_and_initialize_all_classes(k->constants(), THREAD);
2020 if (HAS_PENDING_EXCEPTION) {
2021 // If something went wrong in preloading we just ignore it
2022 clear_pending_exception_if_not_oom(CHECK);
2023 tty->print_cr("Preloading failed for (%d) %s", _compile_the_world_class_counter, buffer);
2024 }
2025 }
2026
2027 if (_compile_the_world_class_counter >= CompileTheWorldStartAt) {
2028 if (k.is_null() || exception_occurred) {
2029 // If something went wrong (e.g. ExceptionInInitializerError) we skip this class
2030 tty->print_cr("CompileTheWorld (%d) : Skipping %s", _compile_the_world_class_counter, buffer);
2031 } else {
2032 tty->print_cr("CompileTheWorld (%d) : %s", _compile_the_world_class_counter, buffer);
2033 // Preload all classes to get around uncommon traps
2034 // Iterate over all methods in class
2035 int comp_level = CompilationPolicy::policy()->initial_compile_level();
2036 for (int n = 0; n < k->methods()->length(); n++) {
2037 methodHandle m (THREAD, k->methods()->at(n));
2038 if (can_be_compiled(m, comp_level)) {
2039 if (++_codecache_sweep_counter == CompileTheWorldSafepointInterval) {
2040 // Give sweeper a chance to keep up with CTW
2041 VM_ForceSafepoint op;
2042 VMThread::execute(&op);
2043 _codecache_sweep_counter = 0;
2044 }
2045 // Force compilation
2046 CompileBroker::compile_method(m, InvocationEntryBci, comp_level,
2047 methodHandle(), 0, CompileTask::Reason_CTW, THREAD);
2048 if (HAS_PENDING_EXCEPTION) {
2049 clear_pending_exception_if_not_oom(CHECK);
2050 tty->print_cr("CompileTheWorld (%d) : Skipping method: %s", _compile_the_world_class_counter, m->name_and_sig_as_C_string());
2051 } else {
2052 _compile_the_world_method_counter++;
2053 }
2054 if (TieredCompilation && TieredStopAtLevel >= CompLevel_full_optimization) {
2055 // Clobber the first compile and force second tier compilation
2056 CompiledMethod* nm = m->code();
2057 if (nm != NULL && !m->is_method_handle_intrinsic()) {
2058 // Throw out the code so that the code cache doesn't fill up
2059 nm->make_not_entrant();
2060 }
2061 CompileBroker::compile_method(m, InvocationEntryBci, CompLevel_full_optimization,
2062 methodHandle(), 0, CompileTask::Reason_CTW, THREAD);
2063 if (HAS_PENDING_EXCEPTION) {
2064 clear_pending_exception_if_not_oom(CHECK);
2065 tty->print_cr("CompileTheWorld (%d) : Skipping method: %s", _compile_the_world_class_counter, m->name_and_sig_as_C_string());
2066 } else {
2067 _compile_the_world_method_counter++;
2068 }
2069 }
2070 } else {
2071 tty->print_cr("CompileTheWorld (%d) : Skipping method: %s", _compile_the_world_class_counter, m->name_and_sig_as_C_string());
2072 }
2073
2074 CompiledMethod* nm = m->code();
2075 if (nm != NULL && !m->is_method_handle_intrinsic()) {
2076 // Throw out the code so that the code cache doesn't fill up
2077 nm->make_not_entrant();
2078 }
2079 }
2080 }
2081 }
2082 }
2083 }
2084 }
2085
2086 #endif //PRODUCT
2087
2088 // Please keep following two functions at end of this file. With them placed at top or in middle of the file,
2089 // they could get inlined by agressive compiler, an unknown trick, see bug 6966589.
2090 void PerfClassTraceTime::initialize() {
2091 if (!UsePerfData) return;
2092
2093 if (_eventp != NULL) {
2094 // increment the event counter
2095 _eventp->inc();
2096 }
2097
2098 // stop the current active thread-local timer to measure inclusive time
2099 _prev_active_event = -1;
2100 for (int i=0; i < EVENT_TYPE_COUNT; i++) {
2101 if (_timers[i].is_active()) {
2102 assert(_prev_active_event == -1, "should have only one active timer");
2103 _prev_active_event = i;
2104 _timers[i].stop();
2105 }
2106 }
2107
2108 if (_recursion_counters == NULL || (_recursion_counters[_event_type])++ == 0) {
2109 // start the inclusive timer if not recursively called
2110 _t.start();
2111 }
2112
2113 // start thread-local timer of the given event type
2114 if (!_timers[_event_type].is_active()) {
2115 _timers[_event_type].start();
2116 }
2117 }
2118
2119 PerfClassTraceTime::~PerfClassTraceTime() {
2120 if (!UsePerfData) return;
2121
2122 // stop the thread-local timer as the event completes
2123 // and resume the thread-local timer of the event next on the stack
2124 _timers[_event_type].stop();
2125 jlong selftime = _timers[_event_type].ticks();
2126
2127 if (_prev_active_event >= 0) {
2128 _timers[_prev_active_event].start();
2129 }
2130
2131 if (_recursion_counters != NULL && --(_recursion_counters[_event_type]) > 0) return;
2132
2133 // increment the counters only on the leaf call
2134 _t.stop();
2135 _timep->inc(_t.ticks());
2136 if (_selftimep != NULL) {
2137 _selftimep->inc(selftime);
2138 }
2139 // add all class loading related event selftime to the accumulated time counter
2140 ClassLoader::perf_accumulated_time()->inc(selftime);
2141
2142 // reset the timer
2143 _timers[_event_type].reset();
2144 }