1 /*
2 * Copyright (c) 1997, 2018, 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 "jvm.h"
27 #include "jimage.hpp"
28 #include "classfile/classFileStream.hpp"
29 #include "classfile/classLoader.inline.hpp"
30 #include "classfile/classLoaderData.inline.hpp"
31 #include "classfile/classLoaderExt.hpp"
32 #include "classfile/javaClasses.hpp"
33 #include "classfile/moduleEntry.hpp"
34 #include "classfile/modules.hpp"
35 #include "classfile/packageEntry.hpp"
36 #include "classfile/klassFactory.hpp"
37 #include "classfile/systemDictionary.hpp"
38 #include "classfile/vmSymbols.hpp"
39 #include "compiler/compileBroker.hpp"
40 #include "interpreter/bytecodeStream.hpp"
41 #include "interpreter/oopMapCache.hpp"
42 #include "logging/log.hpp"
43 #include "logging/logStream.hpp"
44 #include "logging/logTag.hpp"
45 #include "memory/allocation.inline.hpp"
46 #include "memory/filemap.hpp"
47 #include "memory/oopFactory.hpp"
48 #include "memory/resourceArea.hpp"
49 #include "memory/universe.hpp"
50 #include "oops/instanceKlass.hpp"
51 #include "oops/instanceRefKlass.hpp"
52 #include "oops/method.inline.hpp"
53 #include "oops/objArrayOop.inline.hpp"
54 #include "oops/oop.inline.hpp"
55 #include "oops/symbol.hpp"
56 #include "prims/jvm_misc.hpp"
57 #include "runtime/arguments.hpp"
58 #include "runtime/compilationPolicy.hpp"
59 #include "runtime/handles.hpp"
60 #include "runtime/handles.inline.hpp"
61 #include "runtime/init.hpp"
62 #include "runtime/interfaceSupport.inline.hpp"
63 #include "runtime/java.hpp"
64 #include "runtime/javaCalls.hpp"
65 #include "runtime/os.inline.hpp"
66 #include "runtime/threadCritical.hpp"
67 #include "runtime/timer.hpp"
68 #include "runtime/vm_version.hpp"
69 #include "services/management.hpp"
70 #include "services/threadService.hpp"
71 #include "utilities/events.hpp"
72 #include "utilities/hashtable.inline.hpp"
73 #include "utilities/macros.hpp"
74 #if INCLUDE_CDS
75 #include "classfile/sharedPathsMiscInfo.hpp"
76 #endif
77
78 // Entry points in zip.dll for loading zip/jar file entries
79
80 typedef void * * (*ZipOpen_t)(const char *name, char **pmsg);
81 typedef void (*ZipClose_t)(jzfile *zip);
82 typedef jzentry* (*FindEntry_t)(jzfile *zip, const char *name, jint *sizeP, jint *nameLen);
83 typedef jboolean (*ReadEntry_t)(jzfile *zip, jzentry *entry, unsigned char *buf, char *namebuf);
84 typedef jzentry* (*GetNextEntry_t)(jzfile *zip, jint n);
85 typedef jboolean (*ZipInflateFully_t)(void *inBuf, jlong inLen, void *outBuf, jlong outLen, char **pmsg);
86 typedef jint (*Crc32_t)(jint crc, const jbyte *buf, jint len);
87
88 static ZipOpen_t ZipOpen = NULL;
89 static ZipClose_t ZipClose = NULL;
90 static FindEntry_t FindEntry = NULL;
91 static ReadEntry_t ReadEntry = NULL;
92 static GetNextEntry_t GetNextEntry = NULL;
93 static canonicalize_fn_t CanonicalizeEntry = NULL;
94 static ZipInflateFully_t ZipInflateFully = NULL;
95 static Crc32_t Crc32 = NULL;
96
97 // Entry points for jimage.dll for loading jimage file entries
98
99 static JImageOpen_t JImageOpen = NULL;
100 static JImageClose_t JImageClose = NULL;
101 static JImagePackageToModule_t JImagePackageToModule = NULL;
102 static JImageFindResource_t JImageFindResource = NULL;
103 static JImageGetResource_t JImageGetResource = NULL;
104 static JImageResourceIterator_t JImageResourceIterator = NULL;
105 static JImage_ResourcePath_t JImageResourcePath = NULL;
106
107 // Globals
108
109 PerfCounter* ClassLoader::_perf_accumulated_time = NULL;
110 PerfCounter* ClassLoader::_perf_classes_inited = NULL;
111 PerfCounter* ClassLoader::_perf_class_init_time = NULL;
112 PerfCounter* ClassLoader::_perf_class_init_selftime = NULL;
113 PerfCounter* ClassLoader::_perf_classes_verified = NULL;
114 PerfCounter* ClassLoader::_perf_class_verify_time = NULL;
115 PerfCounter* ClassLoader::_perf_class_verify_selftime = NULL;
116 PerfCounter* ClassLoader::_perf_classes_linked = NULL;
117 PerfCounter* ClassLoader::_perf_class_link_time = NULL;
118 PerfCounter* ClassLoader::_perf_class_link_selftime = NULL;
119 PerfCounter* ClassLoader::_perf_class_parse_time = NULL;
120 PerfCounter* ClassLoader::_perf_class_parse_selftime = NULL;
121 PerfCounter* ClassLoader::_perf_sys_class_lookup_time = NULL;
122 PerfCounter* ClassLoader::_perf_shared_classload_time = NULL;
123 PerfCounter* ClassLoader::_perf_sys_classload_time = NULL;
124 PerfCounter* ClassLoader::_perf_app_classload_time = NULL;
125 PerfCounter* ClassLoader::_perf_app_classload_selftime = NULL;
126 PerfCounter* ClassLoader::_perf_app_classload_count = NULL;
127 PerfCounter* ClassLoader::_perf_define_appclasses = NULL;
128 PerfCounter* ClassLoader::_perf_define_appclass_time = NULL;
129 PerfCounter* ClassLoader::_perf_define_appclass_selftime = NULL;
130 PerfCounter* ClassLoader::_perf_app_classfile_bytes_read = NULL;
131 PerfCounter* ClassLoader::_perf_sys_classfile_bytes_read = NULL;
132 PerfCounter* ClassLoader::_sync_systemLoaderLockContentionRate = NULL;
133 PerfCounter* ClassLoader::_sync_nonSystemLoaderLockContentionRate = NULL;
134 PerfCounter* ClassLoader::_sync_JVMFindLoadedClassLockFreeCounter = NULL;
135 PerfCounter* ClassLoader::_sync_JVMDefineClassLockFreeCounter = NULL;
136 PerfCounter* ClassLoader::_sync_JNIDefineClassLockFreeCounter = NULL;
137 PerfCounter* ClassLoader::_unsafe_defineClassCallCounter = NULL;
138 PerfCounter* ClassLoader::_load_instance_class_failCounter = NULL;
139
140 GrowableArray<ModuleClassPathList*>* ClassLoader::_patch_mod_entries = NULL;
141 GrowableArray<ModuleClassPathList*>* ClassLoader::_exploded_entries = NULL;
142 ClassPathEntry* ClassLoader::_jrt_entry = NULL;
143 ClassPathEntry* ClassLoader::_first_append_entry = NULL;
144 ClassPathEntry* ClassLoader::_last_append_entry = NULL;
145 #if INCLUDE_CDS
146 ClassPathEntry* ClassLoader::_app_classpath_entries = NULL;
147 ClassPathEntry* ClassLoader::_last_app_classpath_entry = NULL;
148 ClassPathEntry* ClassLoader::_module_path_entries = NULL;
149 ClassPathEntry* ClassLoader::_last_module_path_entry = NULL;
150 SharedPathsMiscInfo* ClassLoader::_shared_paths_misc_info = NULL;
151 #endif
152
153 // helper routines
154 bool string_starts_with(const char* str, const char* str_to_find) {
155 size_t str_len = strlen(str);
156 size_t str_to_find_len = strlen(str_to_find);
157 if (str_to_find_len > str_len) {
158 return false;
159 }
160 return (strncmp(str, str_to_find, str_to_find_len) == 0);
161 }
162
163 static const char* get_jimage_version_string() {
164 static char version_string[10] = "";
165 if (version_string[0] == '\0') {
166 jio_snprintf(version_string, sizeof(version_string), "%d.%d",
167 Abstract_VM_Version::vm_major_version(), Abstract_VM_Version::vm_minor_version());
168 }
169 return (const char*)version_string;
170 }
171
172 bool ClassLoader::string_ends_with(const char* str, const char* str_to_find) {
173 size_t str_len = strlen(str);
174 size_t str_to_find_len = strlen(str_to_find);
175 if (str_to_find_len > str_len) {
176 return false;
177 }
178 return (strncmp(str + (str_len - str_to_find_len), str_to_find, str_to_find_len) == 0);
179 }
180
181 // Used to obtain the package name from a fully qualified class name.
182 // It is the responsibility of the caller to establish a ResourceMark.
183 const char* ClassLoader::package_from_name(const char* const class_name, bool* bad_class_name) {
184 if (class_name == NULL) {
185 if (bad_class_name != NULL) {
186 *bad_class_name = true;
187 }
188 return NULL;
189 }
190
191 if (bad_class_name != NULL) {
192 *bad_class_name = false;
193 }
194
195 const char* const last_slash = strrchr(class_name, '/');
196 if (last_slash == NULL) {
197 // No package name
198 return NULL;
199 }
200
201 char* class_name_ptr = (char*) class_name;
202 // Skip over '['s
203 if (*class_name_ptr == '[') {
204 do {
205 class_name_ptr++;
206 } while (*class_name_ptr == '[');
207
208 // Fully qualified class names should not contain a 'L'.
209 // Set bad_class_name to true to indicate that the package name
210 // could not be obtained due to an error condition.
211 // In this situation, is_same_class_package returns false.
212 if (*class_name_ptr == 'L') {
213 if (bad_class_name != NULL) {
214 *bad_class_name = true;
215 }
216 return NULL;
217 }
218 }
219
220 int length = last_slash - class_name_ptr;
221
222 // A class name could have just the slash character in the name.
223 if (length <= 0) {
224 // No package name
225 if (bad_class_name != NULL) {
226 *bad_class_name = true;
227 }
228 return NULL;
229 }
230
231 // drop name after last slash (including slash)
232 // Ex., "java/lang/String.class" => "java/lang"
233 char* pkg_name = NEW_RESOURCE_ARRAY(char, length + 1);
234 strncpy(pkg_name, class_name_ptr, length);
235 *(pkg_name+length) = '\0';
236
237 return (const char *)pkg_name;
238 }
239
240 // Given a fully qualified class name, find its defining package in the class loader's
241 // package entry table.
242 PackageEntry* ClassLoader::get_package_entry(const char* class_name, ClassLoaderData* loader_data, TRAPS) {
243 ResourceMark rm(THREAD);
244 const char *pkg_name = ClassLoader::package_from_name(class_name);
245 if (pkg_name == NULL) {
246 return NULL;
247 }
248 PackageEntryTable* pkgEntryTable = loader_data->packages();
249 TempNewSymbol pkg_symbol = SymbolTable::new_symbol(pkg_name, CHECK_NULL);
250 return pkgEntryTable->lookup_only(pkg_symbol);
251 }
252
253 ClassPathDirEntry::ClassPathDirEntry(const char* dir) : ClassPathEntry() {
254 char* copy = NEW_C_HEAP_ARRAY(char, strlen(dir)+1, mtClass);
255 strcpy(copy, dir);
256 _dir = copy;
257 }
258
259
260 ClassFileStream* ClassPathDirEntry::open_stream(const char* name, TRAPS) {
261 // construct full path name
262 assert((_dir != NULL) && (name != NULL), "sanity");
263 size_t path_len = strlen(_dir) + strlen(name) + strlen(os::file_separator()) + 1;
264 char* path = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, path_len);
265 int len = jio_snprintf(path, path_len, "%s%s%s", _dir, os::file_separator(), name);
266 assert(len == (int)(path_len - 1), "sanity");
267 // check if file exists
268 struct stat st;
269 if (os::stat(path, &st) == 0) {
270 // found file, open it
271 int file_handle = os::open(path, 0, 0);
272 if (file_handle != -1) {
273 // read contents into resource array
274 u1* buffer = NEW_RESOURCE_ARRAY(u1, st.st_size);
275 size_t num_read = os::read(file_handle, (char*) buffer, st.st_size);
276 // close file
277 os::close(file_handle);
278 // construct ClassFileStream
279 if (num_read == (size_t)st.st_size) {
280 if (UsePerfData) {
281 ClassLoader::perf_sys_classfile_bytes_read()->inc(num_read);
282 }
283 FREE_RESOURCE_ARRAY(char, path, path_len);
284 // Resource allocated
285 return new ClassFileStream(buffer,
286 st.st_size,
287 _dir,
288 ClassFileStream::verify);
289 }
290 }
291 }
292 FREE_RESOURCE_ARRAY(char, path, path_len);
293 return NULL;
294 }
295
296 ClassPathZipEntry::ClassPathZipEntry(jzfile* zip, const char* zip_name, bool is_boot_append) : ClassPathEntry() {
297 _zip = zip;
298 char *copy = NEW_C_HEAP_ARRAY(char, strlen(zip_name)+1, mtClass);
299 strcpy(copy, zip_name);
300 _zip_name = copy;
301 _is_boot_append = is_boot_append;
302 _multi_versioned = _unknown;
303 }
304
305 ClassPathZipEntry::~ClassPathZipEntry() {
306 if (ZipClose != NULL) {
307 (*ZipClose)(_zip);
308 }
309 FREE_C_HEAP_ARRAY(char, _zip_name);
310 }
311
312 u1* ClassPathZipEntry::open_entry(const char* name, jint* filesize, bool nul_terminate, TRAPS) {
313 // enable call to C land
314 JavaThread* thread = JavaThread::current();
315 ThreadToNativeFromVM ttn(thread);
316 // check whether zip archive contains name
317 jint name_len;
318 jzentry* entry = (*FindEntry)(_zip, name, filesize, &name_len);
319 if (entry == NULL) return NULL;
320 u1* buffer;
321 char name_buf[128];
322 char* filename;
323 if (name_len < 128) {
324 filename = name_buf;
325 } else {
326 filename = NEW_RESOURCE_ARRAY(char, name_len + 1);
327 }
328
329 // read contents into resource array
330 int size = (*filesize) + ((nul_terminate) ? 1 : 0);
331 buffer = NEW_RESOURCE_ARRAY(u1, size);
332 if (!(*ReadEntry)(_zip, entry, buffer, filename)) return NULL;
333
334 // return result
335 if (nul_terminate) {
336 buffer[*filesize] = 0;
337 }
338 return buffer;
339 }
340
341 #if INCLUDE_CDS
342 u1* ClassPathZipEntry::open_versioned_entry(const char* name, jint* filesize, TRAPS) {
343 u1* buffer = NULL;
344 if (DumpSharedSpaces && !_is_boot_append) {
345 // We presume default is multi-release enabled
346 const char* multi_ver = Arguments::get_property("jdk.util.jar.enableMultiRelease");
347 const char* verstr = Arguments::get_property("jdk.util.jar.version");
348 bool is_multi_ver = (multi_ver == NULL ||
349 strcmp(multi_ver, "true") == 0 ||
350 strcmp(multi_ver, "force") == 0) &&
351 is_multiple_versioned(THREAD);
352 // command line version setting
353 int version = 0;
354 const int base_version = 8; // JDK8
355 int cur_ver = JDK_Version::current().major_version();
356 if (verstr != NULL) {
357 version = atoi(verstr);
358 if (version < base_version || version > cur_ver) {
359 // If the specified version is lower than the base version, the base
360 // entry will be used; if the version is higher than the current
361 // jdk version, the highest versioned entry will be used.
362 if (version < base_version) {
363 is_multi_ver = false;
364 }
365 // print out warning, do not use assertion here since it will continue to look
366 // for proper version.
367 warning("JDK%d is not supported in multiple version jars", version);
368 }
369 }
370
371 if (is_multi_ver) {
372 int n;
373 const char* version_entry = "META-INF/versions/";
374 // 10 is the max length of a decimal 32-bit non-negative number
375 // 2 includes the '/' and trailing zero
376 size_t entry_name_len = strlen(version_entry) + 10 + strlen(name) + 2;
377 char* entry_name = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, entry_name_len);
378 if (version > 0) {
379 n = jio_snprintf(entry_name, entry_name_len, "%s%d/%s", version_entry, version, name);
380 entry_name[n] = '\0';
381 buffer = open_entry((const char*)entry_name, filesize, false, CHECK_NULL);
382 if (buffer == NULL) {
383 warning("Could not find %s in %s, try to find highest version instead", entry_name, _zip_name);
384 }
385 }
386 if (buffer == NULL) {
387 for (int i = cur_ver; i >= base_version; i--) {
388 n = jio_snprintf(entry_name, entry_name_len, "%s%d/%s", version_entry, i, name);
389 entry_name[n] = '\0';
390 buffer = open_entry((const char*)entry_name, filesize, false, CHECK_NULL);
391 if (buffer != NULL) {
392 break;
393 }
394 }
395 }
396 FREE_RESOURCE_ARRAY(char, entry_name, entry_name_len);
397 }
398 }
399 return buffer;
400 }
401
402 bool ClassPathZipEntry::is_multiple_versioned(TRAPS) {
403 assert(DumpSharedSpaces, "called only at dump time");
404 if (_multi_versioned != _unknown) {
405 return (_multi_versioned == _yes) ? true : false;
406 }
407 jint size;
408 char* buffer = (char*)open_entry("META-INF/MANIFEST.MF", &size, true, CHECK_false);
409 if (buffer != NULL) {
410 char* p = buffer;
411 for ( ; *p; ++p) *p = tolower(*p);
412 if (strstr(buffer, "multi-release: true") != NULL) {
413 _multi_versioned = _yes;
414 return true;
415 }
416 }
417 _multi_versioned = _no;
418 return false;
419 }
420 #endif // INCLUDE_CDS
421
422 ClassFileStream* ClassPathZipEntry::open_stream(const char* name, TRAPS) {
423 jint filesize;
424 u1* buffer = open_versioned_entry(name, &filesize, CHECK_NULL);
425 if (buffer == NULL) {
426 buffer = open_entry(name, &filesize, false, CHECK_NULL);
427 if (buffer == NULL) {
428 return NULL;
429 }
430 }
431 if (UsePerfData) {
432 ClassLoader::perf_sys_classfile_bytes_read()->inc(filesize);
433 }
434 // Resource allocated
435 return new ClassFileStream(buffer,
436 filesize,
437 _zip_name,
438 ClassFileStream::verify);
439 }
440
441 // invoke function for each entry in the zip file
442 void ClassPathZipEntry::contents_do(void f(const char* name, void* context), void* context) {
443 JavaThread* thread = JavaThread::current();
444 HandleMark handle_mark(thread);
445 ThreadToNativeFromVM ttn(thread);
446 for (int n = 0; ; n++) {
447 jzentry * ze = ((*GetNextEntry)(_zip, n));
448 if (ze == NULL) break;
449 (*f)(ze->name, context);
450 }
451 }
452
453 ClassPathImageEntry::ClassPathImageEntry(JImageFile* jimage, const char* name) :
454 ClassPathEntry(),
455 _jimage(jimage) {
456 guarantee(jimage != NULL, "jimage file is null");
457 guarantee(name != NULL, "jimage file name is null");
458 size_t len = strlen(name) + 1;
459 _name = NEW_C_HEAP_ARRAY(const char, len, mtClass);
460 strncpy((char *)_name, name, len);
461 }
462
463 ClassPathImageEntry::~ClassPathImageEntry() {
464 if (_name != NULL) {
465 FREE_C_HEAP_ARRAY(const char, _name);
466 _name = NULL;
467 }
468 if (_jimage != NULL) {
469 (*JImageClose)(_jimage);
470 _jimage = NULL;
471 }
472 }
473
474 // For a class in a named module, look it up in the jimage file using this syntax:
475 // /<module-name>/<package-name>/<base-class>
476 //
477 // Assumptions:
478 // 1. There are no unnamed modules in the jimage file.
479 // 2. A package is in at most one module in the jimage file.
480 //
481 ClassFileStream* ClassPathImageEntry::open_stream(const char* name, TRAPS) {
482 jlong size;
483 JImageLocationRef location = (*JImageFindResource)(_jimage, "", get_jimage_version_string(), name, &size);
484
485 if (location == 0) {
486 ResourceMark rm;
487 const char* pkg_name = ClassLoader::package_from_name(name);
488
489 if (pkg_name != NULL) {
490 if (!Universe::is_module_initialized()) {
491 location = (*JImageFindResource)(_jimage, JAVA_BASE_NAME, get_jimage_version_string(), name, &size);
492 #if INCLUDE_CDS
493 // CDS uses the boot class loader to load classes whose packages are in
494 // modules defined for other class loaders. So, for now, get their module
495 // names from the "modules" jimage file.
496 if (DumpSharedSpaces && location == 0) {
497 const char* module_name = (*JImagePackageToModule)(_jimage, pkg_name);
498 if (module_name != NULL) {
499 location = (*JImageFindResource)(_jimage, module_name, get_jimage_version_string(), name, &size);
500 }
501 }
502 #endif
503
504 } else {
505 PackageEntry* package_entry = ClassLoader::get_package_entry(name, ClassLoaderData::the_null_class_loader_data(), CHECK_NULL);
506 if (package_entry != NULL) {
507 ResourceMark rm;
508 // Get the module name
509 ModuleEntry* module = package_entry->module();
510 assert(module != NULL, "Boot classLoader package missing module");
511 assert(module->is_named(), "Boot classLoader package is in unnamed module");
512 const char* module_name = module->name()->as_C_string();
513 if (module_name != NULL) {
514 location = (*JImageFindResource)(_jimage, module_name, get_jimage_version_string(), name, &size);
515 }
516 }
517 }
518 }
519 }
520 if (location != 0) {
521 if (UsePerfData) {
522 ClassLoader::perf_sys_classfile_bytes_read()->inc(size);
523 }
524 char* data = NEW_RESOURCE_ARRAY(char, size);
525 (*JImageGetResource)(_jimage, location, data, size);
526 // Resource allocated
527 return new ClassFileStream((u1*)data,
528 (int)size,
529 _name,
530 ClassFileStream::verify);
531 }
532
533 return NULL;
534 }
535
536 JImageLocationRef ClassLoader::jimage_find_resource(JImageFile* jf,
537 const char* module_name,
538 const char* file_name,
539 jlong &size) {
540 return ((*JImageFindResource)(jf, module_name, get_jimage_version_string(), file_name, &size));
541 }
542
543 #ifndef PRODUCT
544 bool ctw_visitor(JImageFile* jimage,
545 const char* module_name, const char* version, const char* package,
546 const char* name, const char* extension, void* arg) {
547 if (strcmp(extension, "class") == 0) {
548 Thread* THREAD = Thread::current();
549 ResourceMark rm(THREAD);
550 char* path = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, JIMAGE_MAX_PATH);
551 jio_snprintf(path, JIMAGE_MAX_PATH - 1, "%s/%s.class", package, name);
552 ClassLoader::compile_the_world_in(path, *(Handle*)arg, THREAD);
553 return !HAS_PENDING_EXCEPTION;
554 }
555 return true;
556 }
557
558 void ClassPathImageEntry::compile_the_world(Handle loader, TRAPS) {
559 tty->print_cr("CompileTheWorld : Compiling all classes in %s", name());
560 tty->cr();
561 (*JImageResourceIterator)(_jimage, (JImageResourceVisitor_t)ctw_visitor, (void *)&loader);
562 if (HAS_PENDING_EXCEPTION) {
563 if (PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())) {
564 CLEAR_PENDING_EXCEPTION;
565 tty->print_cr("\nCompileTheWorld : Ran out of memory\n");
566 tty->print_cr("Increase class metadata storage if a limit was set");
567 } else {
568 tty->print_cr("\nCompileTheWorld : Unexpected exception occurred\n");
569 }
570 }
571 }
572 #endif
573
574 bool ClassPathImageEntry::is_modules_image() const {
575 return ClassLoader::is_modules_image(name());
576 }
577
578 #if INCLUDE_CDS
579 void ClassLoader::exit_with_path_failure(const char* error, const char* message) {
580 assert(DumpSharedSpaces, "only called at dump time");
581 tty->print_cr("Hint: enable -Xlog:class+path=info to diagnose the failure");
582 vm_exit_during_initialization(error, message);
583 }
584 #endif
585
586 ModuleClassPathList::ModuleClassPathList(Symbol* module_name) {
587 _module_name = module_name;
588 _module_first_entry = NULL;
589 _module_last_entry = NULL;
590 }
591
592 ModuleClassPathList::~ModuleClassPathList() {
593 // Clean out each ClassPathEntry on list
594 ClassPathEntry* e = _module_first_entry;
595 while (e != NULL) {
596 ClassPathEntry* next_entry = e->next();
597 delete e;
598 e = next_entry;
599 }
600 }
601
602 void ModuleClassPathList::add_to_list(ClassPathEntry* new_entry) {
603 if (new_entry != NULL) {
604 if (_module_last_entry == NULL) {
605 _module_first_entry = _module_last_entry = new_entry;
606 } else {
607 _module_last_entry->set_next(new_entry);
608 _module_last_entry = new_entry;
609 }
610 }
611 }
612
613 void ClassLoader::trace_class_path(const char* msg, const char* name) {
614 LogTarget(Info, class, path) lt;
615 if (lt.is_enabled()) {
616 LogStream ls(lt);
617 if (msg) {
618 ls.print("%s", msg);
619 }
620 if (name) {
621 if (strlen(name) < 256) {
622 ls.print("%s", name);
623 } else {
624 // For very long paths, we need to print each character separately,
625 // as print_cr() has a length limit
626 while (name[0] != '\0') {
627 ls.print("%c", name[0]);
628 name++;
629 }
630 }
631 }
632 ls.cr();
633 }
634 }
635
636 void ClassLoader::setup_bootstrap_search_path() {
637 const char* sys_class_path = Arguments::get_sysclasspath();
638 if (PrintSharedArchiveAndExit) {
639 // Don't print sys_class_path - this is the bootcp of this current VM process, not necessarily
640 // the same as the bootcp of the shared archive.
641 } else {
642 trace_class_path("bootstrap loader class path=", sys_class_path);
643 }
644 #if INCLUDE_CDS
645 if (DumpSharedSpaces) {
646 _shared_paths_misc_info->add_boot_classpath(sys_class_path);
647 }
648 #endif
649 setup_boot_search_path(sys_class_path);
650 }
651
652 #if INCLUDE_CDS
653 int ClassLoader::get_shared_paths_misc_info_size() {
654 return _shared_paths_misc_info->get_used_bytes();
655 }
656
657 void* ClassLoader::get_shared_paths_misc_info() {
658 return _shared_paths_misc_info->buffer();
659 }
660
661 bool ClassLoader::check_shared_paths_misc_info(void *buf, int size) {
662 SharedPathsMiscInfo* checker = new SharedPathsMiscInfo((char*)buf, size);
663 bool result = checker->check();
664 delete checker;
665 return result;
666 }
667
668 void ClassLoader::setup_app_search_path(const char *class_path) {
669
670 assert(DumpSharedSpaces, "Sanity");
671
672 Thread* THREAD = Thread::current();
673 int len = (int)strlen(class_path);
674 int end = 0;
675
676 // Iterate over class path entries
677 for (int start = 0; start < len; start = end) {
678 while (class_path[end] && class_path[end] != os::path_separator()[0]) {
679 end++;
680 }
681 EXCEPTION_MARK;
682 ResourceMark rm(THREAD);
683 char* path = NEW_RESOURCE_ARRAY(char, end - start + 1);
684 strncpy(path, &class_path[start], end - start);
685 path[end - start] = '\0';
686
687 update_class_path_entry_list(path, false, false);
688
689 while (class_path[end] == os::path_separator()[0]) {
690 end++;
691 }
692 }
693 }
694
695 void ClassLoader::add_to_module_path_entries(const char* path,
696 ClassPathEntry* entry) {
697 assert(entry != NULL, "ClassPathEntry should not be NULL");
698 assert(DumpSharedSpaces, "dump time only");
699
700 // The entry does not exist, add to the list
701 if (_module_path_entries == NULL) {
702 assert(_last_module_path_entry == NULL, "Sanity");
703 _module_path_entries = _last_module_path_entry = entry;
704 } else {
705 _last_module_path_entry->set_next(entry);
706 _last_module_path_entry = entry;
707 }
708 }
709
710 // Add a module path to the _module_path_entries list.
711 void ClassLoader::update_module_path_entry_list(const char *path, TRAPS) {
712 assert(DumpSharedSpaces, "dump time only");
713 struct stat st;
714 int ret = os::stat(path, &st);
715 assert(ret == 0, "module path must exist");
716 // File or directory found
717 ClassPathEntry* new_entry = NULL;
718 new_entry = create_class_path_entry(path, &st, true /* throw_exception */,
719 false /*is_boot_append */, CHECK);
720 if (new_entry == NULL) {
721 return;
722 }
723
724 add_to_module_path_entries(path, new_entry);
725 return;
726 }
727
728 void ClassLoader::setup_module_search_path(const char* path, TRAPS) {
729 update_module_path_entry_list(path, THREAD);
730 }
731 #endif // INCLUDE_CDS
732
733 // Construct the array of module/path pairs as specified to --patch-module
734 // for the boot loader to search ahead of the jimage, if the class being
735 // loaded is defined to a module that has been specified to --patch-module.
736 void ClassLoader::setup_patch_mod_entries() {
737 Thread* THREAD = Thread::current();
738 GrowableArray<ModulePatchPath*>* patch_mod_args = Arguments::get_patch_mod_prefix();
739 int num_of_entries = patch_mod_args->length();
740
741
742 // Set up the boot loader's _patch_mod_entries list
743 _patch_mod_entries = new (ResourceObj::C_HEAP, mtModule) GrowableArray<ModuleClassPathList*>(num_of_entries, true);
744
745 for (int i = 0; i < num_of_entries; i++) {
746 const char* module_name = (patch_mod_args->at(i))->module_name();
747 Symbol* const module_sym = SymbolTable::lookup(module_name, (int)strlen(module_name), CHECK);
748 assert(module_sym != NULL, "Failed to obtain Symbol for module name");
749 ModuleClassPathList* module_cpl = new ModuleClassPathList(module_sym);
750
751 char* class_path = (patch_mod_args->at(i))->path_string();
752 int len = (int)strlen(class_path);
753 int end = 0;
754 // Iterate over the module's class path entries
755 for (int start = 0; start < len; start = end) {
756 while (class_path[end] && class_path[end] != os::path_separator()[0]) {
757 end++;
758 }
759 EXCEPTION_MARK;
760 ResourceMark rm(THREAD);
761 char* path = NEW_RESOURCE_ARRAY(char, end - start + 1);
762 strncpy(path, &class_path[start], end - start);
763 path[end - start] = '\0';
764
765 struct stat st;
766 if (os::stat(path, &st) == 0) {
767 // File or directory found
768 ClassPathEntry* new_entry = create_class_path_entry(path, &st, false, false, CHECK);
769 // If the path specification is valid, enter it into this module's list
770 if (new_entry != NULL) {
771 module_cpl->add_to_list(new_entry);
772 }
773 }
774
775 while (class_path[end] == os::path_separator()[0]) {
776 end++;
777 }
778 }
779
780 // Record the module into the list of --patch-module entries only if
781 // valid ClassPathEntrys have been created
782 if (module_cpl->module_first_entry() != NULL) {
783 _patch_mod_entries->push(module_cpl);
784 }
785 }
786 }
787
788 // Determine whether the module has been patched via the command-line
789 // option --patch-module
790 bool ClassLoader::is_in_patch_mod_entries(Symbol* module_name) {
791 if (_patch_mod_entries != NULL && _patch_mod_entries->is_nonempty()) {
792 int table_len = _patch_mod_entries->length();
793 for (int i = 0; i < table_len; i++) {
794 ModuleClassPathList* patch_mod = _patch_mod_entries->at(i);
795 if (module_name->fast_compare(patch_mod->module_name()) == 0) {
796 return true;
797 }
798 }
799 }
800 return false;
801 }
802
803 // Set up the _jrt_entry if present and boot append path
804 void ClassLoader::setup_boot_search_path(const char *class_path) {
805 int len = (int)strlen(class_path);
806 int end = 0;
807 bool set_base_piece = true;
808
809 #if INCLUDE_CDS
810 if (DumpSharedSpaces) {
811 if (!Arguments::has_jimage()) {
812 vm_exit_during_initialization("CDS is not supported in exploded JDK build", NULL);
813 }
814 }
815 #endif
816
817 // Iterate over class path entries
818 for (int start = 0; start < len; start = end) {
819 while (class_path[end] && class_path[end] != os::path_separator()[0]) {
820 end++;
821 }
822 EXCEPTION_MARK;
823 ResourceMark rm(THREAD);
824 char* path = NEW_RESOURCE_ARRAY(char, end - start + 1);
825 strncpy(path, &class_path[start], end - start);
826 path[end - start] = '\0';
827
828 if (set_base_piece) {
829 // The first time through the bootstrap_search setup, it must be determined
830 // what the base or core piece of the boot loader search is. Either a java runtime
831 // image is present or this is an exploded module build situation.
832 assert(string_ends_with(path, MODULES_IMAGE_NAME) || string_ends_with(path, JAVA_BASE_NAME),
833 "Incorrect boot loader search path, no java runtime image or " JAVA_BASE_NAME " exploded build");
834 struct stat st;
835 if (os::stat(path, &st) == 0) {
836 // Directory found
837 ClassPathEntry* new_entry = create_class_path_entry(path, &st, false, false, CHECK);
838
839 // Check for a jimage
840 if (Arguments::has_jimage()) {
841 assert(_jrt_entry == NULL, "should not setup bootstrap class search path twice");
842 assert(new_entry != NULL && new_entry->is_modules_image(), "No java runtime image present");
843 _jrt_entry = new_entry;
844 assert(_jrt_entry->jimage() != NULL, "No java runtime image");
845 }
846 } else {
847 // If path does not exist, exit
848 vm_exit_during_initialization("Unable to establish the boot loader search path", path);
849 }
850 set_base_piece = false;
851 } else {
852 // Every entry on the system boot class path after the initial base piece,
853 // which is set by os::set_boot_path(), is considered an appended entry.
854 update_class_path_entry_list(path, false, true);
855 }
856
857 while (class_path[end] == os::path_separator()[0]) {
858 end++;
859 }
860 }
861 }
862
863 // During an exploded modules build, each module defined to the boot loader
864 // will be added to the ClassLoader::_exploded_entries array.
865 void ClassLoader::add_to_exploded_build_list(Symbol* module_sym, TRAPS) {
866 assert(!ClassLoader::has_jrt_entry(), "Exploded build not applicable");
867 assert(_exploded_entries != NULL, "_exploded_entries was not initialized");
868
869 // Find the module's symbol
870 ResourceMark rm(THREAD);
871 const char *module_name = module_sym->as_C_string();
872 const char *home = Arguments::get_java_home();
873 const char file_sep = os::file_separator()[0];
874 // 10 represents the length of "modules" + 2 file separators + \0
875 size_t len = strlen(home) + strlen(module_name) + 10;
876 char *path = NEW_RESOURCE_ARRAY(char, len);
877 jio_snprintf(path, len, "%s%cmodules%c%s", home, file_sep, file_sep, module_name);
878
879 struct stat st;
880 if (os::stat(path, &st) == 0) {
881 // Directory found
882 ClassPathEntry* new_entry = create_class_path_entry(path, &st, false, false, CHECK);
883
884 // If the path specification is valid, enter it into this module's list.
885 // There is no need to check for duplicate modules in the exploded entry list,
886 // since no two modules with the same name can be defined to the boot loader.
887 // This is checked at module definition time in Modules::define_module.
888 if (new_entry != NULL) {
889 ModuleClassPathList* module_cpl = new ModuleClassPathList(module_sym);
890 module_cpl->add_to_list(new_entry);
891 {
892 MutexLocker ml(Module_lock, THREAD);
893 _exploded_entries->push(module_cpl);
894 }
895 log_info(class, load)("path: %s", path);
896 }
897 }
898 }
899
900 ClassPathEntry* ClassLoader::create_class_path_entry(const char *path, const struct stat* st,
901 bool throw_exception,
902 bool is_boot_append, TRAPS) {
903 JavaThread* thread = JavaThread::current();
904 ClassPathEntry* new_entry = NULL;
905 if ((st->st_mode & S_IFMT) == S_IFREG) {
906 ResourceMark rm(thread);
907 // Regular file, should be a zip or jimage file
908 // Canonicalized filename
909 char* canonical_path = NEW_RESOURCE_ARRAY_IN_THREAD(thread, char, JVM_MAXPATHLEN);
910 if (!get_canonical_path(path, canonical_path, JVM_MAXPATHLEN)) {
911 // This matches the classic VM
912 if (throw_exception) {
913 THROW_MSG_(vmSymbols::java_io_IOException(), "Bad pathname", NULL);
914 } else {
915 return NULL;
916 }
917 }
918 jint error;
919 JImageFile* jimage =(*JImageOpen)(canonical_path, &error);
920 if (jimage != NULL) {
921 new_entry = new ClassPathImageEntry(jimage, canonical_path);
922 } else {
923 char* error_msg = NULL;
924 jzfile* zip;
925 {
926 // enable call to C land
927 ThreadToNativeFromVM ttn(thread);
928 HandleMark hm(thread);
929 zip = (*ZipOpen)(canonical_path, &error_msg);
930 }
931 if (zip != NULL && error_msg == NULL) {
932 new_entry = new ClassPathZipEntry(zip, path, is_boot_append);
933 } else {
934 char *msg;
935 if (error_msg == NULL) {
936 msg = NEW_RESOURCE_ARRAY_IN_THREAD(thread, char, strlen(path) + 128); ;
937 jio_snprintf(msg, strlen(path) + 127, "error in opening JAR file %s", path);
938 } else {
939 int len = (int)(strlen(path) + strlen(error_msg) + 128);
940 msg = NEW_RESOURCE_ARRAY_IN_THREAD(thread, char, len); ;
941 jio_snprintf(msg, len - 1, "error in opening JAR file <%s> %s", error_msg, path);
942 }
943 // Don't complain about bad jar files added via -Xbootclasspath/a:.
944 if (throw_exception && is_init_completed()) {
945 THROW_MSG_(vmSymbols::java_lang_ClassNotFoundException(), msg, NULL);
946 } else {
947 return NULL;
948 }
949 }
950 }
951 log_info(class, path)("opened: %s", path);
952 log_info(class, load)("opened: %s", path);
953 } else {
954 // Directory
955 new_entry = new ClassPathDirEntry(path);
956 log_info(class, load)("path: %s", path);
957 }
958 return new_entry;
959 }
960
961
962 // Create a class path zip entry for a given path (return NULL if not found
963 // or zip/JAR file cannot be opened)
964 ClassPathZipEntry* ClassLoader::create_class_path_zip_entry(const char *path, bool is_boot_append) {
965 // check for a regular file
966 struct stat st;
967 if (os::stat(path, &st) == 0) {
968 if ((st.st_mode & S_IFMT) == S_IFREG) {
969 char canonical_path[JVM_MAXPATHLEN];
970 if (get_canonical_path(path, canonical_path, JVM_MAXPATHLEN)) {
971 char* error_msg = NULL;
972 jzfile* zip;
973 {
974 // enable call to C land
975 JavaThread* thread = JavaThread::current();
976 ThreadToNativeFromVM ttn(thread);
977 HandleMark hm(thread);
978 zip = (*ZipOpen)(canonical_path, &error_msg);
979 }
980 if (zip != NULL && error_msg == NULL) {
981 // create using canonical path
982 return new ClassPathZipEntry(zip, canonical_path, is_boot_append);
983 }
984 }
985 }
986 }
987 return NULL;
988 }
989
990 // returns true if entry already on class path
991 bool ClassLoader::contains_append_entry(const char* name) {
992 ClassPathEntry* e = _first_append_entry;
993 while (e != NULL) {
994 // assume zip entries have been canonicalized
995 if (strcmp(name, e->name()) == 0) {
996 return true;
997 }
998 e = e->next();
999 }
1000 return false;
1001 }
1002
1003 void ClassLoader::add_to_boot_append_entries(ClassPathEntry *new_entry) {
1004 if (new_entry != NULL) {
1005 if (_last_append_entry == NULL) {
1006 assert(_first_append_entry == NULL, "boot loader's append class path entry list not empty");
1007 _first_append_entry = _last_append_entry = new_entry;
1008 } else {
1009 _last_append_entry->set_next(new_entry);
1010 _last_append_entry = new_entry;
1011 }
1012 }
1013 }
1014
1015 // Record the path entries specified in -cp during dump time. The recorded
1016 // information will be used at runtime for loading the archived app classes.
1017 //
1018 // Note that at dump time, ClassLoader::_app_classpath_entries are NOT used for
1019 // loading app classes. Instead, the app class are loaded by the
1020 // jdk/internal/loader/ClassLoaders$AppClassLoader instance.
1021 void ClassLoader::add_to_app_classpath_entries(const char* path,
1022 ClassPathEntry* entry,
1023 bool check_for_duplicates) {
1024 #if INCLUDE_CDS
1025 assert(entry != NULL, "ClassPathEntry should not be NULL");
1026 ClassPathEntry* e = _app_classpath_entries;
1027 if (check_for_duplicates) {
1028 while (e != NULL) {
1029 if (strcmp(e->name(), entry->name()) == 0) {
1030 // entry already exists
1031 return;
1032 }
1033 e = e->next();
1034 }
1035 }
1036
1037 // The entry does not exist, add to the list
1038 if (_app_classpath_entries == NULL) {
1039 assert(_last_app_classpath_entry == NULL, "Sanity");
1040 _app_classpath_entries = _last_app_classpath_entry = entry;
1041 } else {
1042 _last_app_classpath_entry->set_next(entry);
1043 _last_app_classpath_entry = entry;
1044 }
1045
1046 if (entry->is_jar_file()) {
1047 ClassLoaderExt::process_jar_manifest(entry, check_for_duplicates);
1048 }
1049 #endif
1050 }
1051
1052 // Returns true IFF the file/dir exists and the entry was successfully created.
1053 bool ClassLoader::update_class_path_entry_list(const char *path,
1054 bool check_for_duplicates,
1055 bool is_boot_append,
1056 bool throw_exception) {
1057 struct stat st;
1058 if (os::stat(path, &st) == 0) {
1059 // File or directory found
1060 ClassPathEntry* new_entry = NULL;
1061 Thread* THREAD = Thread::current();
1062 new_entry = create_class_path_entry(path, &st, throw_exception, is_boot_append, CHECK_(false));
1063 if (new_entry == NULL) {
1064 return false;
1065 }
1066
1067 // Do not reorder the bootclasspath which would break get_system_package().
1068 // Add new entry to linked list
1069 if (is_boot_append) {
1070 add_to_boot_append_entries(new_entry);
1071 } else {
1072 add_to_app_classpath_entries(path, new_entry, check_for_duplicates);
1073 }
1074 return true;
1075 } else {
1076 #if INCLUDE_CDS
1077 if (DumpSharedSpaces) {
1078 _shared_paths_misc_info->add_nonexist_path(path);
1079 }
1080 #endif
1081 return false;
1082 }
1083 }
1084
1085 static void print_module_entry_table(const GrowableArray<ModuleClassPathList*>* const module_list) {
1086 ResourceMark rm;
1087 int num_of_entries = module_list->length();
1088 for (int i = 0; i < num_of_entries; i++) {
1089 ClassPathEntry* e;
1090 ModuleClassPathList* mpl = module_list->at(i);
1091 tty->print("%s=", mpl->module_name()->as_C_string());
1092 e = mpl->module_first_entry();
1093 while (e != NULL) {
1094 tty->print("%s", e->name());
1095 e = e->next();
1096 if (e != NULL) {
1097 tty->print("%s", os::path_separator());
1098 }
1099 }
1100 tty->print(" ;");
1101 }
1102 }
1103
1104 void ClassLoader::print_bootclasspath() {
1105 ClassPathEntry* e;
1106 tty->print("[bootclasspath= ");
1107
1108 // Print --patch-module module/path specifications first
1109 if (_patch_mod_entries != NULL) {
1110 print_module_entry_table(_patch_mod_entries);
1111 }
1112
1113 // [jimage | exploded modules build]
1114 if (has_jrt_entry()) {
1115 // Print the location of the java runtime image
1116 tty->print("%s ;", _jrt_entry->name());
1117 } else {
1118 // Print exploded module build path specifications
1119 if (_exploded_entries != NULL) {
1120 print_module_entry_table(_exploded_entries);
1121 }
1122 }
1123
1124 // appended entries
1125 e = _first_append_entry;
1126 while (e != NULL) {
1127 tty->print("%s ;", e->name());
1128 e = e->next();
1129 }
1130 tty->print_cr("]");
1131 }
1132
1133 void ClassLoader::load_zip_library() {
1134 assert(ZipOpen == NULL, "should not load zip library twice");
1135 // First make sure native library is loaded
1136 os::native_java_library();
1137 // Load zip library
1138 char path[JVM_MAXPATHLEN];
1139 char ebuf[1024];
1140 void* handle = NULL;
1141 if (os::dll_locate_lib(path, sizeof(path), Arguments::get_dll_dir(), "zip")) {
1142 handle = os::dll_load(path, ebuf, sizeof ebuf);
1143 }
1144 if (handle == NULL) {
1145 vm_exit_during_initialization("Unable to load ZIP library", path);
1146 }
1147 // Lookup zip entry points
1148 ZipOpen = CAST_TO_FN_PTR(ZipOpen_t, os::dll_lookup(handle, "ZIP_Open"));
1149 ZipClose = CAST_TO_FN_PTR(ZipClose_t, os::dll_lookup(handle, "ZIP_Close"));
1150 FindEntry = CAST_TO_FN_PTR(FindEntry_t, os::dll_lookup(handle, "ZIP_FindEntry"));
1151 ReadEntry = CAST_TO_FN_PTR(ReadEntry_t, os::dll_lookup(handle, "ZIP_ReadEntry"));
1152 GetNextEntry = CAST_TO_FN_PTR(GetNextEntry_t, os::dll_lookup(handle, "ZIP_GetNextEntry"));
1153 ZipInflateFully = CAST_TO_FN_PTR(ZipInflateFully_t, os::dll_lookup(handle, "ZIP_InflateFully"));
1154 Crc32 = CAST_TO_FN_PTR(Crc32_t, os::dll_lookup(handle, "ZIP_CRC32"));
1155
1156 // ZIP_Close is not exported on Windows in JDK5.0 so don't abort if ZIP_Close is NULL
1157 if (ZipOpen == NULL || FindEntry == NULL || ReadEntry == NULL ||
1158 GetNextEntry == NULL || Crc32 == NULL) {
1159 vm_exit_during_initialization("Corrupted ZIP library", path);
1160 }
1161
1162 if (ZipInflateFully == NULL) {
1163 vm_exit_during_initialization("Corrupted ZIP library ZIP_InflateFully missing", path);
1164 }
1165
1166 // Lookup canonicalize entry in libjava.dll
1167 void *javalib_handle = os::native_java_library();
1168 CanonicalizeEntry = CAST_TO_FN_PTR(canonicalize_fn_t, os::dll_lookup(javalib_handle, "Canonicalize"));
1169 // This lookup only works on 1.3. Do not check for non-null here
1170 }
1171
1172 void ClassLoader::load_jimage_library() {
1173 // First make sure native library is loaded
1174 os::native_java_library();
1175 // Load jimage library
1176 char path[JVM_MAXPATHLEN];
1177 char ebuf[1024];
1178 void* handle = NULL;
1179 if (os::dll_locate_lib(path, sizeof(path), Arguments::get_dll_dir(), "jimage")) {
1180 handle = os::dll_load(path, ebuf, sizeof ebuf);
1181 }
1182 if (handle == NULL) {
1183 vm_exit_during_initialization("Unable to load jimage library", path);
1184 }
1185
1186 // Lookup jimage entry points
1187 JImageOpen = CAST_TO_FN_PTR(JImageOpen_t, os::dll_lookup(handle, "JIMAGE_Open"));
1188 guarantee(JImageOpen != NULL, "function JIMAGE_Open not found");
1189 JImageClose = CAST_TO_FN_PTR(JImageClose_t, os::dll_lookup(handle, "JIMAGE_Close"));
1190 guarantee(JImageClose != NULL, "function JIMAGE_Close not found");
1191 JImagePackageToModule = CAST_TO_FN_PTR(JImagePackageToModule_t, os::dll_lookup(handle, "JIMAGE_PackageToModule"));
1192 guarantee(JImagePackageToModule != NULL, "function JIMAGE_PackageToModule not found");
1193 JImageFindResource = CAST_TO_FN_PTR(JImageFindResource_t, os::dll_lookup(handle, "JIMAGE_FindResource"));
1194 guarantee(JImageFindResource != NULL, "function JIMAGE_FindResource not found");
1195 JImageGetResource = CAST_TO_FN_PTR(JImageGetResource_t, os::dll_lookup(handle, "JIMAGE_GetResource"));
1196 guarantee(JImageGetResource != NULL, "function JIMAGE_GetResource not found");
1197 JImageResourceIterator = CAST_TO_FN_PTR(JImageResourceIterator_t, os::dll_lookup(handle, "JIMAGE_ResourceIterator"));
1198 guarantee(JImageResourceIterator != NULL, "function JIMAGE_ResourceIterator not found");
1199 JImageResourcePath = CAST_TO_FN_PTR(JImage_ResourcePath_t, os::dll_lookup(handle, "JIMAGE_ResourcePath"));
1200 guarantee(JImageResourcePath != NULL, "function JIMAGE_ResourcePath not found");
1201 }
1202
1203 jboolean ClassLoader::decompress(void *in, u8 inSize, void *out, u8 outSize, char **pmsg) {
1204 return (*ZipInflateFully)(in, inSize, out, outSize, pmsg);
1205 }
1206
1207 int ClassLoader::crc32(int crc, const char* buf, int len) {
1208 assert(Crc32 != NULL, "ZIP_CRC32 is not found");
1209 return (*Crc32)(crc, (const jbyte*)buf, len);
1210 }
1211
1212 // Function add_package extracts the package from the fully qualified class name
1213 // and checks if the package is in the boot loader's package entry table. If so,
1214 // then it sets the classpath_index in the package entry record.
1215 //
1216 // The classpath_index field is used to find the entry on the boot loader class
1217 // path for packages with classes loaded by the boot loader from -Xbootclasspath/a
1218 // in an unnamed module. It is also used to indicate (for all packages whose
1219 // classes are loaded by the boot loader) that at least one of the package's
1220 // classes has been loaded.
1221 bool ClassLoader::add_package(const char *fullq_class_name, s2 classpath_index, TRAPS) {
1222 assert(fullq_class_name != NULL, "just checking");
1223
1224 // Get package name from fully qualified class name.
1225 ResourceMark rm;
1226 const char *cp = package_from_name(fullq_class_name);
1227 if (cp != NULL) {
1228 PackageEntryTable* pkg_entry_tbl = ClassLoaderData::the_null_class_loader_data()->packages();
1229 TempNewSymbol pkg_symbol = SymbolTable::new_symbol(cp, CHECK_false);
1230 PackageEntry* pkg_entry = pkg_entry_tbl->lookup_only(pkg_symbol);
1231 if (pkg_entry != NULL) {
1232 assert(classpath_index != -1, "Unexpected classpath_index");
1233 pkg_entry->set_classpath_index(classpath_index);
1234 } else {
1235 return false;
1236 }
1237 }
1238 return true;
1239 }
1240
1241 oop ClassLoader::get_system_package(const char* name, TRAPS) {
1242 // Look up the name in the boot loader's package entry table.
1243 if (name != NULL) {
1244 TempNewSymbol package_sym = SymbolTable::new_symbol(name, (int)strlen(name), CHECK_NULL);
1245 // Look for the package entry in the boot loader's package entry table.
1246 PackageEntry* package =
1247 ClassLoaderData::the_null_class_loader_data()->packages()->lookup_only(package_sym);
1248
1249 // Return NULL if package does not exist or if no classes in that package
1250 // have been loaded.
1251 if (package != NULL && package->has_loaded_class()) {
1252 ModuleEntry* module = package->module();
1253 if (module->location() != NULL) {
1254 ResourceMark rm(THREAD);
1255 Handle ml = java_lang_String::create_from_str(
1256 module->location()->as_C_string(), THREAD);
1257 return ml();
1258 }
1259 // Return entry on boot loader class path.
1260 Handle cph = java_lang_String::create_from_str(
1261 ClassLoader::classpath_entry(package->classpath_index())->name(), THREAD);
1262 return cph();
1263 }
1264 }
1265 return NULL;
1266 }
1267
1268 objArrayOop ClassLoader::get_system_packages(TRAPS) {
1269 ResourceMark rm(THREAD);
1270 // List of pointers to PackageEntrys that have loaded classes.
1271 GrowableArray<PackageEntry*>* loaded_class_pkgs = new GrowableArray<PackageEntry*>(50);
1272 {
1273 MutexLocker ml(Module_lock, THREAD);
1274
1275 PackageEntryTable* pe_table =
1276 ClassLoaderData::the_null_class_loader_data()->packages();
1277
1278 // Collect the packages that have at least one loaded class.
1279 for (int x = 0; x < pe_table->table_size(); x++) {
1280 for (PackageEntry* package_entry = pe_table->bucket(x);
1281 package_entry != NULL;
1282 package_entry = package_entry->next()) {
1283 if (package_entry->has_loaded_class()) {
1284 loaded_class_pkgs->append(package_entry);
1285 }
1286 }
1287 }
1288 }
1289
1290
1291 // Allocate objArray and fill with java.lang.String
1292 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
1293 loaded_class_pkgs->length(), CHECK_NULL);
1294 objArrayHandle result(THREAD, r);
1295 for (int x = 0; x < loaded_class_pkgs->length(); x++) {
1296 PackageEntry* package_entry = loaded_class_pkgs->at(x);
1297 Handle str = java_lang_String::create_from_symbol(package_entry->name(), CHECK_NULL);
1298 result->obj_at_put(x, str());
1299 }
1300 return result();
1301 }
1302
1303 // caller needs ResourceMark
1304 const char* ClassLoader::file_name_for_class_name(const char* class_name,
1305 int class_name_len) {
1306 assert(class_name != NULL, "invariant");
1307 assert((int)strlen(class_name) == class_name_len, "invariant");
1308
1309 static const char class_suffix[] = ".class";
1310
1311 char* const file_name = NEW_RESOURCE_ARRAY(char,
1312 class_name_len +
1313 sizeof(class_suffix)); // includes term NULL
1314
1315 strncpy(file_name, class_name, class_name_len);
1316 strncpy(&file_name[class_name_len], class_suffix, sizeof(class_suffix));
1317
1318 return file_name;
1319 }
1320
1321 ClassPathEntry* find_first_module_cpe(ModuleEntry* mod_entry,
1322 const GrowableArray<ModuleClassPathList*>* const module_list) {
1323 int num_of_entries = module_list->length();
1324 const Symbol* class_module_name = mod_entry->name();
1325
1326 // Loop through all the modules in either the patch-module or exploded entries looking for module
1327 for (int i = 0; i < num_of_entries; i++) {
1328 ModuleClassPathList* module_cpl = module_list->at(i);
1329 Symbol* module_cpl_name = module_cpl->module_name();
1330
1331 if (module_cpl_name->fast_compare(class_module_name) == 0) {
1332 // Class' module has been located.
1333 return module_cpl->module_first_entry();
1334 }
1335 }
1336 return NULL;
1337 }
1338
1339
1340 // Search either the patch-module or exploded build entries for class.
1341 ClassFileStream* ClassLoader::search_module_entries(const GrowableArray<ModuleClassPathList*>* const module_list,
1342 const char* const class_name,
1343 const char* const file_name,
1344 TRAPS) {
1345 ClassFileStream* stream = NULL;
1346
1347 // Find the class' defining module in the boot loader's module entry table
1348 PackageEntry* pkg_entry = get_package_entry(class_name, ClassLoaderData::the_null_class_loader_data(), CHECK_NULL);
1349 ModuleEntry* mod_entry = (pkg_entry != NULL) ? pkg_entry->module() : NULL;
1350
1351 // If the module system has not defined java.base yet, then
1352 // classes loaded are assumed to be defined to java.base.
1353 // When java.base is eventually defined by the module system,
1354 // all packages of classes that have been previously loaded
1355 // are verified in ModuleEntryTable::verify_javabase_packages().
1356 if (!Universe::is_module_initialized() &&
1357 !ModuleEntryTable::javabase_defined() &&
1358 mod_entry == NULL) {
1359 mod_entry = ModuleEntryTable::javabase_moduleEntry();
1360 }
1361
1362 // The module must be a named module
1363 ClassPathEntry* e = NULL;
1364 if (mod_entry != NULL && mod_entry->is_named()) {
1365 if (module_list == _exploded_entries) {
1366 // The exploded build entries can be added to at any time so a lock is
1367 // needed when searching them.
1368 assert(!ClassLoader::has_jrt_entry(), "Must be exploded build");
1369 MutexLocker ml(Module_lock, THREAD);
1370 e = find_first_module_cpe(mod_entry, module_list);
1371 } else {
1372 e = find_first_module_cpe(mod_entry, module_list);
1373 }
1374 }
1375
1376 // Try to load the class from the module's ClassPathEntry list.
1377 while (e != NULL) {
1378 stream = e->open_stream(file_name, CHECK_NULL);
1379 // No context.check is required since CDS is not supported
1380 // for an exploded modules build or if --patch-module is specified.
1381 if (NULL != stream) {
1382 return stream;
1383 }
1384 e = e->next();
1385 }
1386 // If the module was located, break out even if the class was not
1387 // located successfully from that module's ClassPathEntry list.
1388 // There will not be another valid entry for that module.
1389 return NULL;
1390 }
1391
1392 // Called by the boot classloader to load classes
1393 InstanceKlass* ClassLoader::load_class(Symbol* name, bool search_append_only, TRAPS) {
1394 assert(name != NULL, "invariant");
1395 assert(THREAD->is_Java_thread(), "must be a JavaThread");
1396
1397 ResourceMark rm(THREAD);
1398 HandleMark hm(THREAD);
1399
1400 const char* const class_name = name->as_C_string();
1401
1402 EventMark m("loading class %s", class_name);
1403
1404 const char* const file_name = file_name_for_class_name(class_name,
1405 name->utf8_length());
1406 assert(file_name != NULL, "invariant");
1407
1408 // Lookup stream for parsing .class file
1409 ClassFileStream* stream = NULL;
1410 s2 classpath_index = 0;
1411 ClassPathEntry* e = NULL;
1412
1413 // If DumpSharedSpaces is true boot loader visibility boundaries are set to:
1414 // - [jimage] + [_first_append_entry to _last_append_entry] (all path entries).
1415 //
1416 // If search_append_only is true, boot loader visibility boundaries are
1417 // set to be _first_append_entry to the end. This includes:
1418 // [-Xbootclasspath/a]; [jvmti appended entries]
1419 //
1420 // If both DumpSharedSpaces and search_append_only are false, boot loader
1421 // visibility boundaries are set to be the --patch-module entries plus the base piece.
1422 // This would include:
1423 // [--patch-module=<module>=<file>(<pathsep><file>)*]; [jimage | exploded module build]
1424 //
1425
1426 // Load Attempt #1: --patch-module
1427 // Determine the class' defining module. If it appears in the _patch_mod_entries,
1428 // attempt to load the class from those locations specific to the module.
1429 // Specifications to --patch-module can contain a partial number of classes
1430 // that are part of the overall module definition. So if a particular class is not
1431 // found within its module specification, the search should continue to Load Attempt #2.
1432 // Note: The --patch-module entries are never searched if the boot loader's
1433 // visibility boundary is limited to only searching the append entries.
1434 if (_patch_mod_entries != NULL && !search_append_only) {
1435 // At CDS dump time, the --patch-module entries are ignored. That means a
1436 // class is still loaded from the runtime image even if it might
1437 // appear in the _patch_mod_entries. The runtime shared class visibility
1438 // check will determine if a shared class is visible based on the runtime
1439 // environemnt, including the runtime --patch-module setting.
1440 if (!DumpSharedSpaces) {
1441 stream = search_module_entries(_patch_mod_entries, class_name, file_name, CHECK_NULL);
1442 }
1443 }
1444
1445 // Load Attempt #2: [jimage | exploded build]
1446 if (!search_append_only && (NULL == stream)) {
1447 if (has_jrt_entry()) {
1448 e = _jrt_entry;
1449 stream = _jrt_entry->open_stream(file_name, CHECK_NULL);
1450 } else {
1451 // Exploded build - attempt to locate class in its defining module's location.
1452 assert(_exploded_entries != NULL, "No exploded build entries present");
1453 stream = search_module_entries(_exploded_entries, class_name, file_name, CHECK_NULL);
1454 }
1455 }
1456
1457 // Load Attempt #3: [-Xbootclasspath/a]; [jvmti appended entries]
1458 if ((search_append_only || DumpSharedSpaces) && (NULL == stream)) {
1459 // For the boot loader append path search, the starting classpath_index
1460 // for the appended piece is always 1 to account for either the
1461 // _jrt_entry or the _exploded_entries.
1462 assert(classpath_index == 0, "The classpath_index has been incremented incorrectly");
1463 classpath_index = 1;
1464
1465 e = _first_append_entry;
1466 while (e != NULL) {
1467 stream = e->open_stream(file_name, CHECK_NULL);
1468 if (NULL != stream) {
1469 break;
1470 }
1471 e = e->next();
1472 ++classpath_index;
1473 }
1474 }
1475
1476 if (NULL == stream) {
1477 return NULL;
1478 }
1479
1480 stream->set_verify(ClassLoaderExt::should_verify(classpath_index));
1481
1482 ClassLoaderData* loader_data = ClassLoaderData::the_null_class_loader_data();
1483 Handle protection_domain;
1484
1485 InstanceKlass* result = KlassFactory::create_from_stream(stream,
1486 name,
1487 loader_data,
1488 protection_domain,
1489 NULL, // host_klass
1490 NULL, // cp_patches
1491 THREAD);
1492 if (HAS_PENDING_EXCEPTION) {
1493 if (DumpSharedSpaces) {
1494 tty->print_cr("Preload Error: Failed to load %s", class_name);
1495 }
1496 return NULL;
1497 }
1498
1499 if (!add_package(file_name, classpath_index, THREAD)) {
1500 return NULL;
1501 }
1502
1503 return result;
1504 }
1505
1506 #if INCLUDE_CDS
1507 char* ClassLoader::skip_uri_protocol(char* source) {
1508 if (strncmp(source, "file:", 5) == 0) {
1509 // file: protocol path could start with file:/ or file:///
1510 // locate the char after all the forward slashes
1511 int offset = 5;
1512 while (*(source + offset) == '/') {
1513 offset++;
1514 }
1515 source += offset;
1516 // for non-windows platforms, move back one char as the path begins with a '/'
1517 #ifndef _WINDOWS
1518 source -= 1;
1519 #endif
1520 } else if (strncmp(source, "jrt:/", 5) == 0) {
1521 source += 5;
1522 }
1523 return source;
1524 }
1525
1526 // Record the shared classpath index and loader type for classes loaded
1527 // by the builtin loaders at dump time.
1528 void ClassLoader::record_result(InstanceKlass* ik, const ClassFileStream* stream, TRAPS) {
1529 assert(DumpSharedSpaces, "sanity");
1530 assert(stream != NULL, "sanity");
1531
1532 if (ik->is_anonymous()) {
1533 // We do not archive anonymous classes.
1534 return;
1535 }
1536
1537 oop loader = ik->class_loader();
1538 char* src = (char*)stream->source();
1539 if (src == NULL) {
1540 if (loader == NULL) {
1541 // JFR classes
1542 ik->set_shared_classpath_index(0);
1543 ik->set_class_loader_type(ClassLoader::BOOT_LOADER);
1544 }
1545 return;
1546 }
1547
1548 assert(has_jrt_entry(), "CDS dumping does not support exploded JDK build");
1549
1550 ResourceMark rm(THREAD);
1551 int classpath_index = -1;
1552 PackageEntry* pkg_entry = ik->package();
1553
1554 if (FileMapInfo::get_number_of_shared_paths() > 0) {
1555 char* canonical_path_table_entry = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, JVM_MAXPATHLEN);
1556
1557 // save the path from the file: protocol or the module name from the jrt: protocol
1558 // if no protocol prefix is found, path is the same as stream->source()
1559 char* path = skip_uri_protocol(src);
1560 char* canonical_class_src_path = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, JVM_MAXPATHLEN);
1561 bool res = get_canonical_path(path, canonical_class_src_path, JVM_MAXPATHLEN);
1562 assert(res, "sanity");
1563 for (int i = 0; i < FileMapInfo::get_number_of_shared_paths(); i++) {
1564 SharedClassPathEntry* ent = FileMapInfo::shared_path(i);
1565 res = get_canonical_path(ent->name(), canonical_path_table_entry, JVM_MAXPATHLEN);
1566 assert(res, "sanity");
1567 // If the path (from the class stream source) is the same as the shared
1568 // class or module path, then we have a match.
1569 if (strcmp(canonical_path_table_entry, canonical_class_src_path) == 0) {
1570 // NULL pkg_entry and pkg_entry in an unnamed module implies the class
1571 // is from the -cp or boot loader append path which consists of -Xbootclasspath/a
1572 // and jvmti appended entries.
1573 if ((pkg_entry == NULL) || (pkg_entry->in_unnamed_module())) {
1574 // Ensure the index is within the -cp range before assigning
1575 // to the classpath_index.
1576 if (SystemDictionary::is_system_class_loader(loader) &&
1577 (i >= ClassLoaderExt::app_class_paths_start_index()) &&
1578 (i < ClassLoaderExt::app_module_paths_start_index())) {
1579 classpath_index = i;
1580 break;
1581 } else {
1582 if ((i >= 1) &&
1583 (i < ClassLoaderExt::app_class_paths_start_index())) {
1584 // The class must be from boot loader append path which consists of
1585 // -Xbootclasspath/a and jvmti appended entries.
1586 assert(loader == NULL, "sanity");
1587 classpath_index = i;
1588 break;
1589 }
1590 }
1591 } else {
1592 // A class from a named module from the --module-path. Ensure the index is
1593 // within the --module-path range before assigning to the classpath_index.
1594 if ((pkg_entry != NULL) && !(pkg_entry->in_unnamed_module()) && (i > 0)) {
1595 if (i >= ClassLoaderExt::app_module_paths_start_index() &&
1596 i < FileMapInfo::get_number_of_shared_paths()) {
1597 classpath_index = i;
1598 break;
1599 }
1600 }
1601 }
1602 }
1603 // for index 0 and the stream->source() is the modules image or has the jrt: protocol.
1604 // The class must be from the runtime modules image.
1605 if (i == 0 && (is_modules_image(src) || string_starts_with(src, "jrt:"))) {
1606 classpath_index = i;
1607 break;
1608 }
1609 }
1610
1611 // No path entry found for this class. Must be a shared class loaded by the
1612 // user defined classloader.
1613 if (classpath_index < 0) {
1614 assert(ik->shared_classpath_index() < 0, "Sanity");
1615 return;
1616 }
1617 } else {
1618 // The shared path table is set up after module system initialization.
1619 // The path table contains no entry before that. Any classes loaded prior
1620 // to the setup of the shared path table must be from the modules image.
1621 assert(is_modules_image(src), "stream must be from modules image");
1622 assert(FileMapInfo::get_number_of_shared_paths() == 0, "shared path table must not have been setup");
1623 classpath_index = 0;
1624 }
1625
1626 const char* const class_name = ik->name()->as_C_string();
1627 const char* const file_name = file_name_for_class_name(class_name,
1628 ik->name()->utf8_length());
1629 assert(file_name != NULL, "invariant");
1630
1631 ClassLoaderExt::record_result(classpath_index, ik, THREAD);
1632 }
1633 #endif // INCLUDE_CDS
1634
1635 // Initialize the class loader's access to methods in libzip. Parse and
1636 // process the boot classpath into a list ClassPathEntry objects. Once
1637 // this list has been created, it must not change order (see class PackageInfo)
1638 // it can be appended to and is by jvmti and the kernel vm.
1639
1640 void ClassLoader::initialize() {
1641 EXCEPTION_MARK;
1642
1643 if (UsePerfData) {
1644 // jvmstat performance counters
1645 NEWPERFTICKCOUNTER(_perf_accumulated_time, SUN_CLS, "time");
1646 NEWPERFTICKCOUNTER(_perf_class_init_time, SUN_CLS, "classInitTime");
1647 NEWPERFTICKCOUNTER(_perf_class_init_selftime, SUN_CLS, "classInitTime.self");
1648 NEWPERFTICKCOUNTER(_perf_class_verify_time, SUN_CLS, "classVerifyTime");
1649 NEWPERFTICKCOUNTER(_perf_class_verify_selftime, SUN_CLS, "classVerifyTime.self");
1650 NEWPERFTICKCOUNTER(_perf_class_link_time, SUN_CLS, "classLinkedTime");
1651 NEWPERFTICKCOUNTER(_perf_class_link_selftime, SUN_CLS, "classLinkedTime.self");
1652 NEWPERFEVENTCOUNTER(_perf_classes_inited, SUN_CLS, "initializedClasses");
1653 NEWPERFEVENTCOUNTER(_perf_classes_linked, SUN_CLS, "linkedClasses");
1654 NEWPERFEVENTCOUNTER(_perf_classes_verified, SUN_CLS, "verifiedClasses");
1655
1656 NEWPERFTICKCOUNTER(_perf_class_parse_time, SUN_CLS, "parseClassTime");
1657 NEWPERFTICKCOUNTER(_perf_class_parse_selftime, SUN_CLS, "parseClassTime.self");
1658 NEWPERFTICKCOUNTER(_perf_sys_class_lookup_time, SUN_CLS, "lookupSysClassTime");
1659 NEWPERFTICKCOUNTER(_perf_shared_classload_time, SUN_CLS, "sharedClassLoadTime");
1660 NEWPERFTICKCOUNTER(_perf_sys_classload_time, SUN_CLS, "sysClassLoadTime");
1661 NEWPERFTICKCOUNTER(_perf_app_classload_time, SUN_CLS, "appClassLoadTime");
1662 NEWPERFTICKCOUNTER(_perf_app_classload_selftime, SUN_CLS, "appClassLoadTime.self");
1663 NEWPERFEVENTCOUNTER(_perf_app_classload_count, SUN_CLS, "appClassLoadCount");
1664 NEWPERFTICKCOUNTER(_perf_define_appclasses, SUN_CLS, "defineAppClasses");
1665 NEWPERFTICKCOUNTER(_perf_define_appclass_time, SUN_CLS, "defineAppClassTime");
1666 NEWPERFTICKCOUNTER(_perf_define_appclass_selftime, SUN_CLS, "defineAppClassTime.self");
1667 NEWPERFBYTECOUNTER(_perf_app_classfile_bytes_read, SUN_CLS, "appClassBytes");
1668 NEWPERFBYTECOUNTER(_perf_sys_classfile_bytes_read, SUN_CLS, "sysClassBytes");
1669
1670
1671 // The following performance counters are added for measuring the impact
1672 // of the bug fix of 6365597. They are mainly focused on finding out
1673 // the behavior of system & user-defined classloader lock, whether
1674 // ClassLoader.loadClass/findClass is being called synchronized or not.
1675 NEWPERFEVENTCOUNTER(_sync_systemLoaderLockContentionRate, SUN_CLS,
1676 "systemLoaderLockContentionRate");
1677 NEWPERFEVENTCOUNTER(_sync_nonSystemLoaderLockContentionRate, SUN_CLS,
1678 "nonSystemLoaderLockContentionRate");
1679 NEWPERFEVENTCOUNTER(_sync_JVMFindLoadedClassLockFreeCounter, SUN_CLS,
1680 "jvmFindLoadedClassNoLockCalls");
1681 NEWPERFEVENTCOUNTER(_sync_JVMDefineClassLockFreeCounter, SUN_CLS,
1682 "jvmDefineClassNoLockCalls");
1683
1684 NEWPERFEVENTCOUNTER(_sync_JNIDefineClassLockFreeCounter, SUN_CLS,
1685 "jniDefineClassNoLockCalls");
1686
1687 NEWPERFEVENTCOUNTER(_unsafe_defineClassCallCounter, SUN_CLS,
1688 "unsafeDefineClassCalls");
1689
1690 NEWPERFEVENTCOUNTER(_load_instance_class_failCounter, SUN_CLS,
1691 "loadInstanceClassFailRate");
1692 }
1693
1694 // lookup zip library entry points
1695 load_zip_library();
1696 // lookup jimage library entry points
1697 load_jimage_library();
1698 #if INCLUDE_CDS
1699 // initialize search path
1700 if (DumpSharedSpaces) {
1701 _shared_paths_misc_info = new SharedPathsMiscInfo();
1702 }
1703 #endif
1704 setup_bootstrap_search_path();
1705 }
1706
1707 #if INCLUDE_CDS
1708 void ClassLoader::initialize_shared_path() {
1709 if (DumpSharedSpaces) {
1710 ClassLoaderExt::setup_search_paths();
1711 _shared_paths_misc_info->write_jint(0); // see comments in SharedPathsMiscInfo::check()
1712 }
1713 }
1714
1715 void ClassLoader::initialize_module_path(TRAPS) {
1716 if (DumpSharedSpaces) {
1717 ClassLoaderExt::setup_module_paths(THREAD);
1718 FileMapInfo::allocate_shared_path_table();
1719 }
1720 }
1721 #endif
1722
1723 jlong ClassLoader::classloader_time_ms() {
1724 return UsePerfData ?
1725 Management::ticks_to_ms(_perf_accumulated_time->get_value()) : -1;
1726 }
1727
1728 jlong ClassLoader::class_init_count() {
1729 return UsePerfData ? _perf_classes_inited->get_value() : -1;
1730 }
1731
1732 jlong ClassLoader::class_init_time_ms() {
1733 return UsePerfData ?
1734 Management::ticks_to_ms(_perf_class_init_time->get_value()) : -1;
1735 }
1736
1737 jlong ClassLoader::class_verify_time_ms() {
1738 return UsePerfData ?
1739 Management::ticks_to_ms(_perf_class_verify_time->get_value()) : -1;
1740 }
1741
1742 jlong ClassLoader::class_link_count() {
1743 return UsePerfData ? _perf_classes_linked->get_value() : -1;
1744 }
1745
1746 jlong ClassLoader::class_link_time_ms() {
1747 return UsePerfData ?
1748 Management::ticks_to_ms(_perf_class_link_time->get_value()) : -1;
1749 }
1750
1751 int ClassLoader::compute_Object_vtable() {
1752 // hardwired for JDK1.2 -- would need to duplicate class file parsing
1753 // code to determine actual value from file
1754 // Would be value '11' if finals were in vtable
1755 int JDK_1_2_Object_vtable_size = 5;
1756 return JDK_1_2_Object_vtable_size * vtableEntry::size();
1757 }
1758
1759
1760 void classLoader_init1() {
1761 ClassLoader::initialize();
1762 }
1763
1764 // Complete the ClassPathEntry setup for the boot loader
1765 void ClassLoader::classLoader_init2(TRAPS) {
1766 // Setup the list of module/path pairs for --patch-module processing
1767 // This must be done after the SymbolTable is created in order
1768 // to use fast_compare on module names instead of a string compare.
1769 if (Arguments::get_patch_mod_prefix() != NULL) {
1770 setup_patch_mod_entries();
1771 }
1772
1773 // Create the ModuleEntry for java.base (must occur after setup_patch_mod_entries
1774 // to successfully determine if java.base has been patched)
1775 create_javabase();
1776
1777 // Setup the initial java.base/path pair for the exploded build entries.
1778 // As more modules are defined during module system initialization, more
1779 // entries will be added to the exploded build array.
1780 if (!has_jrt_entry()) {
1781 assert(!DumpSharedSpaces, "DumpSharedSpaces not supported with exploded module builds");
1782 assert(!UseSharedSpaces, "UsedSharedSpaces not supported with exploded module builds");
1783 // Set up the boot loader's _exploded_entries list. Note that this gets
1784 // done before loading any classes, by the same thread that will
1785 // subsequently do the first class load. So, no lock is needed for this.
1786 assert(_exploded_entries == NULL, "Should only get initialized once");
1787 _exploded_entries = new (ResourceObj::C_HEAP, mtModule)
1788 GrowableArray<ModuleClassPathList*>(EXPLODED_ENTRY_SIZE, true);
1789 add_to_exploded_build_list(vmSymbols::java_base(), CHECK);
1790 }
1791 }
1792
1793
1794 bool ClassLoader::get_canonical_path(const char* orig, char* out, int len) {
1795 assert(orig != NULL && out != NULL && len > 0, "bad arguments");
1796 if (CanonicalizeEntry != NULL) {
1797 JavaThread* THREAD = JavaThread::current();
1798 JNIEnv* env = THREAD->jni_environment();
1799 ResourceMark rm(THREAD);
1800
1801 // os::native_path writes into orig_copy
1802 char* orig_copy = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, strlen(orig)+1);
1803 strcpy(orig_copy, orig);
1804 if ((CanonicalizeEntry)(env, os::native_path(orig_copy), out, len) < 0) {
1805 return false;
1806 }
1807 } else {
1808 // On JDK 1.2.2 the Canonicalize does not exist, so just do nothing
1809 strncpy(out, orig, len);
1810 out[len - 1] = '\0';
1811 }
1812 return true;
1813 }
1814
1815 void ClassLoader::create_javabase() {
1816 Thread* THREAD = Thread::current();
1817
1818 // Create java.base's module entry for the boot
1819 // class loader prior to loading j.l.Ojbect.
1820 ClassLoaderData* null_cld = ClassLoaderData::the_null_class_loader_data();
1821
1822 // Get module entry table
1823 ModuleEntryTable* null_cld_modules = null_cld->modules();
1824 if (null_cld_modules == NULL) {
1825 vm_exit_during_initialization("No ModuleEntryTable for the boot class loader");
1826 }
1827
1828 {
1829 MutexLocker ml(Module_lock, THREAD);
1830 ModuleEntry* jb_module = null_cld_modules->locked_create_entry_or_null(Handle(),
1831 false, vmSymbols::java_base(), NULL, NULL, null_cld);
1832 if (jb_module == NULL) {
1833 vm_exit_during_initialization("Unable to create ModuleEntry for " JAVA_BASE_NAME);
1834 }
1835 ModuleEntryTable::set_javabase_moduleEntry(jb_module);
1836 }
1837 }
1838
1839 #ifndef PRODUCT
1840
1841 // CompileTheWorld
1842 //
1843 // Iterates over all class path entries and forces compilation of all methods
1844 // in all classes found. Currently, only zip/jar archives are searched.
1845 //
1846 // The classes are loaded by the Java level bootstrap class loader, and the
1847 // initializer is called. If DelayCompilationDuringStartup is true (default),
1848 // the interpreter will run the initialization code. Note that forcing
1849 // initialization in this way could potentially lead to initialization order
1850 // problems, in which case we could just force the initialization bit to be set.
1851
1852
1853 // We need to iterate over the contents of a zip/jar file, so we replicate the
1854 // jzcell and jzfile definitions from zip_util.h but rename jzfile to real_jzfile,
1855 // since jzfile already has a void* definition.
1856 //
1857 // Note that this is only used in debug mode.
1858 //
1859 // HotSpot integration note:
1860 // Matches zip_util.h 1.14 99/06/01 from jdk1.3 beta H build
1861
1862
1863 // JDK 1.3 version
1864 typedef struct real_jzentry { /* Zip file entry */
1865 char *name; /* entry name */
1866 jint time; /* modification time */
1867 jint size; /* size of uncompressed data */
1868 jint csize; /* size of compressed data (zero if uncompressed) */
1869 jint crc; /* crc of uncompressed data */
1870 char *comment; /* optional zip file comment */
1871 jbyte *extra; /* optional extra data */
1872 jint pos; /* position of LOC header (if negative) or data */
1873 } real_jzentry;
1874
1875 typedef struct real_jzfile { /* Zip file */
1876 char *name; /* zip file name */
1877 jint refs; /* number of active references */
1878 jint fd; /* open file descriptor */
1879 void *lock; /* read lock */
1880 char *comment; /* zip file comment */
1881 char *msg; /* zip error message */
1882 void *entries; /* array of hash cells */
1883 jint total; /* total number of entries */
1884 unsigned short *table; /* Hash chain heads: indexes into entries */
1885 jint tablelen; /* number of hash eads */
1886 real_jzfile *next; /* next zip file in search list */
1887 jzentry *cache; /* we cache the most recently freed jzentry */
1888 /* Information on metadata names in META-INF directory */
1889 char **metanames; /* array of meta names (may have null names) */
1890 jint metacount; /* number of slots in metanames array */
1891 /* If there are any per-entry comments, they are in the comments array */
1892 char **comments;
1893 } real_jzfile;
1894
1895 void ClassPathDirEntry::compile_the_world(Handle loader, TRAPS) {
1896 // For now we only compile all methods in all classes in zip/jar files
1897 tty->print_cr("CompileTheWorld : Skipped classes in %s", _dir);
1898 tty->cr();
1899 }
1900
1901 void ClassPathZipEntry::compile_the_world(Handle loader, TRAPS) {
1902 real_jzfile* zip = (real_jzfile*) _zip;
1903 tty->print_cr("CompileTheWorld : Compiling all classes in %s", zip->name);
1904 tty->cr();
1905 // Iterate over all entries in zip file
1906 for (int n = 0; ; n++) {
1907 real_jzentry * ze = (real_jzentry *)((*GetNextEntry)(_zip, n));
1908 if (ze == NULL) break;
1909 ClassLoader::compile_the_world_in(ze->name, loader, CHECK);
1910 }
1911 if (HAS_PENDING_EXCEPTION) {
1912 if (PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())) {
1913 CLEAR_PENDING_EXCEPTION;
1914 tty->print_cr("\nCompileTheWorld : Ran out of memory\n");
1915 tty->print_cr("Increase class metadata storage if a limit was set");
1916 } else {
1917 tty->print_cr("\nCompileTheWorld : Unexpected exception occurred\n");
1918 }
1919 }
1920 }
1921
1922 void ClassLoader::compile_the_world() {
1923 EXCEPTION_MARK;
1924 HandleMark hm(THREAD);
1925 ResourceMark rm(THREAD);
1926
1927 assert(has_jrt_entry(), "Compile The World not supported with exploded module build");
1928
1929 // Find bootstrap loader
1930 Handle system_class_loader (THREAD, SystemDictionary::java_system_loader());
1931 jlong start = os::javaTimeMillis();
1932
1933 // Compile the world for the modular java runtime image
1934 _jrt_entry->compile_the_world(system_class_loader, CATCH);
1935
1936 // Iterate over all bootstrap class path appended entries
1937 ClassPathEntry* e = _first_append_entry;
1938 while (e != NULL) {
1939 assert(!e->is_modules_image(), "A modular java runtime image is present on the list of appended entries");
1940 e->compile_the_world(system_class_loader, CATCH);
1941 e = e->next();
1942 }
1943 jlong end = os::javaTimeMillis();
1944 tty->print_cr("CompileTheWorld : Done (%d classes, %d methods, " JLONG_FORMAT " ms)",
1945 _compile_the_world_class_counter, _compile_the_world_method_counter, (end - start));
1946 {
1947 // Print statistics as if before normal exit:
1948 extern void print_statistics();
1949 print_statistics();
1950 }
1951 vm_exit(0);
1952 }
1953
1954 int ClassLoader::_compile_the_world_class_counter = 0;
1955 int ClassLoader::_compile_the_world_method_counter = 0;
1956 static int _codecache_sweep_counter = 0;
1957
1958 // Filter out all exceptions except OOMs
1959 static void clear_pending_exception_if_not_oom(TRAPS) {
1960 if (HAS_PENDING_EXCEPTION &&
1961 !PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())) {
1962 CLEAR_PENDING_EXCEPTION;
1963 }
1964 // The CHECK at the caller will propagate the exception out
1965 }
1966
1967 /**
1968 * Returns if the given method should be compiled when doing compile-the-world.
1969 *
1970 * TODO: This should be a private method in a CompileTheWorld class.
1971 */
1972 static bool can_be_compiled(const methodHandle& m, int comp_level) {
1973 assert(CompileTheWorld, "must be");
1974
1975 // It's not valid to compile a native wrapper for MethodHandle methods
1976 // that take a MemberName appendix since the bytecode signature is not
1977 // correct.
1978 vmIntrinsics::ID iid = m->intrinsic_id();
1979 if (MethodHandles::is_signature_polymorphic(iid) && MethodHandles::has_member_arg(iid)) {
1980 return false;
1981 }
1982
1983 return CompilationPolicy::can_be_compiled(m, comp_level);
1984 }
1985
1986 void ClassLoader::compile_the_world_in(char* name, Handle loader, TRAPS) {
1987 if (string_ends_with(name, ".class")) {
1988 // We have a .class file
1989 int len = (int)strlen(name);
1990 char buffer[2048];
1991 strncpy(buffer, name, len - 6);
1992 buffer[len-6] = 0;
1993 // If the file has a period after removing .class, it's not really a
1994 // valid class file. The class loader will check everything else.
1995 if (strchr(buffer, '.') == NULL) {
1996 _compile_the_world_class_counter++;
1997 if (_compile_the_world_class_counter > CompileTheWorldStopAt) return;
1998
1999 // Construct name without extension
2000 TempNewSymbol sym = SymbolTable::new_symbol(buffer, CHECK);
2001 // Use loader to load and initialize class
2002 Klass* k = SystemDictionary::resolve_or_null(sym, loader, Handle(), THREAD);
2003 if (k != NULL && !HAS_PENDING_EXCEPTION) {
2004 k->initialize(THREAD);
2005 }
2006 bool exception_occurred = HAS_PENDING_EXCEPTION;
2007 clear_pending_exception_if_not_oom(CHECK);
2008 if (CompileTheWorldPreloadClasses && k != NULL) {
2009 InstanceKlass* ik = InstanceKlass::cast(k);
2010 ConstantPool::preload_and_initialize_all_classes(ik->constants(), THREAD);
2011 if (HAS_PENDING_EXCEPTION) {
2012 // If something went wrong in preloading we just ignore it
2013 clear_pending_exception_if_not_oom(CHECK);
2014 tty->print_cr("Preloading failed for (%d) %s", _compile_the_world_class_counter, buffer);
2015 }
2016 }
2017
2018 if (_compile_the_world_class_counter >= CompileTheWorldStartAt) {
2019 if (k == NULL || exception_occurred) {
2020 // If something went wrong (e.g. ExceptionInInitializerError) we skip this class
2021 tty->print_cr("CompileTheWorld (%d) : Skipping %s", _compile_the_world_class_counter, buffer);
2022 } else {
2023 tty->print_cr("CompileTheWorld (%d) : %s", _compile_the_world_class_counter, buffer);
2024 // Preload all classes to get around uncommon traps
2025 // Iterate over all methods in class
2026 int comp_level = CompilationPolicy::policy()->initial_compile_level();
2027 InstanceKlass* ik = InstanceKlass::cast(k);
2028 for (int n = 0; n < ik->methods()->length(); n++) {
2029 methodHandle m (THREAD, ik->methods()->at(n));
2030 if (can_be_compiled(m, comp_level)) {
2031 if (++_codecache_sweep_counter == CompileTheWorldSafepointInterval) {
2032 // Give sweeper a chance to keep up with CTW
2033 VM_CTWThreshold op;
2034 VMThread::execute(&op);
2035 _codecache_sweep_counter = 0;
2036 }
2037 // Force compilation
2038 CompileBroker::compile_method(m, InvocationEntryBci, comp_level,
2039 methodHandle(), 0, CompileTask::Reason_CTW, THREAD);
2040 if (HAS_PENDING_EXCEPTION) {
2041 clear_pending_exception_if_not_oom(CHECK);
2042 tty->print_cr("CompileTheWorld (%d) : Skipping method: %s", _compile_the_world_class_counter, m->name_and_sig_as_C_string());
2043 } else {
2044 _compile_the_world_method_counter++;
2045 }
2046 if (TieredCompilation && TieredStopAtLevel >= CompLevel_full_optimization) {
2047 // Clobber the first compile and force second tier compilation
2048 CompiledMethod* nm = m->code();
2049 if (nm != NULL && !m->is_method_handle_intrinsic()) {
2050 // Throw out the code so that the code cache doesn't fill up
2051 nm->make_not_entrant();
2052 }
2053 CompileBroker::compile_method(m, InvocationEntryBci, CompLevel_full_optimization,
2054 methodHandle(), 0, CompileTask::Reason_CTW, THREAD);
2055 if (HAS_PENDING_EXCEPTION) {
2056 clear_pending_exception_if_not_oom(CHECK);
2057 tty->print_cr("CompileTheWorld (%d) : Skipping method: %s", _compile_the_world_class_counter, m->name_and_sig_as_C_string());
2058 } else {
2059 _compile_the_world_method_counter++;
2060 }
2061 }
2062 } else {
2063 tty->print_cr("CompileTheWorld (%d) : Skipping method: %s", _compile_the_world_class_counter, m->name_and_sig_as_C_string());
2064 }
2065
2066 CompiledMethod* nm = m->code();
2067 if (nm != NULL && !m->is_method_handle_intrinsic()) {
2068 // Throw out the code so that the code cache doesn't fill up
2069 nm->make_not_entrant();
2070 }
2071 }
2072 }
2073 }
2074 }
2075 }
2076 }
2077
2078 #endif //PRODUCT
2079
2080 // Please keep following two functions at end of this file. With them placed at top or in middle of the file,
2081 // they could get inlined by agressive compiler, an unknown trick, see bug 6966589.
2082 void PerfClassTraceTime::initialize() {
2083 if (!UsePerfData) return;
2084
2085 if (_eventp != NULL) {
2086 // increment the event counter
2087 _eventp->inc();
2088 }
2089
2090 // stop the current active thread-local timer to measure inclusive time
2091 _prev_active_event = -1;
2092 for (int i=0; i < EVENT_TYPE_COUNT; i++) {
2093 if (_timers[i].is_active()) {
2094 assert(_prev_active_event == -1, "should have only one active timer");
2095 _prev_active_event = i;
2096 _timers[i].stop();
2097 }
2098 }
2099
2100 if (_recursion_counters == NULL || (_recursion_counters[_event_type])++ == 0) {
2101 // start the inclusive timer if not recursively called
2102 _t.start();
2103 }
2104
2105 // start thread-local timer of the given event type
2106 if (!_timers[_event_type].is_active()) {
2107 _timers[_event_type].start();
2108 }
2109 }
2110
2111 PerfClassTraceTime::~PerfClassTraceTime() {
2112 if (!UsePerfData) return;
2113
2114 // stop the thread-local timer as the event completes
2115 // and resume the thread-local timer of the event next on the stack
2116 _timers[_event_type].stop();
2117 jlong selftime = _timers[_event_type].ticks();
2118
2119 if (_prev_active_event >= 0) {
2120 _timers[_prev_active_event].start();
2121 }
2122
2123 if (_recursion_counters != NULL && --(_recursion_counters[_event_type]) > 0) return;
2124
2125 // increment the counters only on the leaf call
2126 _t.stop();
2127 _timep->inc(_t.ticks());
2128 if (_selftimep != NULL) {
2129 _selftimep->inc(selftime);
2130 }
2131 // add all class loading related event selftime to the accumulated time counter
2132 ClassLoader::perf_accumulated_time()->inc(selftime);
2133
2134 // reset the timer
2135 _timers[_event_type].reset();
2136 }