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 "gc/shared/collectedHeap.inline.hpp"
41 #include "gc/shared/generation.hpp"
42 #include "interpreter/bytecodeStream.hpp"
43 #include "interpreter/oopMapCache.hpp"
44 #include "logging/log.hpp"
45 #include "logging/logStream.hpp"
46 #include "logging/logTag.hpp"
47 #include "memory/allocation.inline.hpp"
48 #include "memory/filemap.hpp"
49 #include "memory/oopFactory.hpp"
50 #include "memory/resourceArea.hpp"
51 #include "memory/universe.hpp"
52 #include "oops/instanceKlass.hpp"
53 #include "oops/instanceRefKlass.hpp"
54 #include "oops/method.inline.hpp"
55 #include "oops/objArrayOop.inline.hpp"
56 #include "oops/oop.inline.hpp"
57 #include "oops/symbol.hpp"
58 #include "prims/jvm_misc.hpp"
59 #include "runtime/arguments.hpp"
60 #include "runtime/compilationPolicy.hpp"
61 #include "runtime/handles.hpp"
62 #include "runtime/handles.inline.hpp"
63 #include "runtime/init.hpp"
64 #include "runtime/interfaceSupport.inline.hpp"
65 #include "runtime/java.hpp"
66 #include "runtime/javaCalls.hpp"
67 #include "runtime/os.inline.hpp"
68 #include "runtime/threadCritical.hpp"
69 #include "runtime/timer.hpp"
70 #include "runtime/vm_version.hpp"
71 #include "services/management.hpp"
72 #include "services/threadService.hpp"
73 #include "utilities/events.hpp"
74 #include "utilities/hashtable.inline.hpp"
75 #include "utilities/macros.hpp"
76 #if INCLUDE_CDS
77 #include "classfile/sharedClassUtil.hpp"
78 #include "classfile/sharedPathsMiscInfo.hpp"
79 #endif
80
81 // Entry points in zip.dll for loading zip/jar file entries
82
83 typedef void * * (JNICALL *ZipOpen_t)(const char *name, char **pmsg);
84 typedef void (JNICALL *ZipClose_t)(jzfile *zip);
85 typedef jzentry* (JNICALL *FindEntry_t)(jzfile *zip, const char *name, jint *sizeP, jint *nameLen);
86 typedef jboolean (JNICALL *ReadEntry_t)(jzfile *zip, jzentry *entry, unsigned char *buf, char *namebuf);
87 typedef jzentry* (JNICALL *GetNextEntry_t)(jzfile *zip, jint n);
88 typedef jboolean (JNICALL *ZipInflateFully_t)(void *inBuf, jlong inLen, void *outBuf, jlong outLen, char **pmsg);
89 typedef jint (JNICALL *Crc32_t)(jint crc, const jbyte *buf, jint len);
90
91 static ZipOpen_t ZipOpen = NULL;
92 static ZipClose_t ZipClose = NULL;
93 static FindEntry_t FindEntry = NULL;
94 static ReadEntry_t ReadEntry = NULL;
95 static GetNextEntry_t GetNextEntry = NULL;
96 static canonicalize_fn_t CanonicalizeEntry = NULL;
97 static ZipInflateFully_t ZipInflateFully = NULL;
98 static Crc32_t Crc32 = NULL;
99
100 // Entry points for jimage.dll for loading jimage file entries
101
102 static JImageOpen_t JImageOpen = NULL;
103 static JImageClose_t JImageClose = NULL;
104 static JImagePackageToModule_t JImagePackageToModule = NULL;
105 static JImageFindResource_t JImageFindResource = NULL;
106 static JImageGetResource_t JImageGetResource = NULL;
107 static JImageResourceIterator_t JImageResourceIterator = NULL;
108 static JImage_ResourcePath_t JImageResourcePath = NULL;
109
110 // Globals
111
112 PerfCounter* ClassLoader::_perf_accumulated_time = NULL;
113 PerfCounter* ClassLoader::_perf_classes_inited = NULL;
114 PerfCounter* ClassLoader::_perf_class_init_time = NULL;
115 PerfCounter* ClassLoader::_perf_class_init_selftime = NULL;
116 PerfCounter* ClassLoader::_perf_classes_verified = NULL;
117 PerfCounter* ClassLoader::_perf_class_verify_time = NULL;
118 PerfCounter* ClassLoader::_perf_class_verify_selftime = NULL;
119 PerfCounter* ClassLoader::_perf_classes_linked = NULL;
120 PerfCounter* ClassLoader::_perf_class_link_time = NULL;
121 PerfCounter* ClassLoader::_perf_class_link_selftime = NULL;
122 PerfCounter* ClassLoader::_perf_class_parse_time = NULL;
123 PerfCounter* ClassLoader::_perf_class_parse_selftime = NULL;
124 PerfCounter* ClassLoader::_perf_sys_class_lookup_time = NULL;
125 PerfCounter* ClassLoader::_perf_shared_classload_time = NULL;
126 PerfCounter* ClassLoader::_perf_sys_classload_time = NULL;
127 PerfCounter* ClassLoader::_perf_app_classload_time = NULL;
128 PerfCounter* ClassLoader::_perf_app_classload_selftime = NULL;
129 PerfCounter* ClassLoader::_perf_app_classload_count = NULL;
130 PerfCounter* ClassLoader::_perf_define_appclasses = NULL;
131 PerfCounter* ClassLoader::_perf_define_appclass_time = NULL;
132 PerfCounter* ClassLoader::_perf_define_appclass_selftime = NULL;
133 PerfCounter* ClassLoader::_perf_app_classfile_bytes_read = NULL;
134 PerfCounter* ClassLoader::_perf_sys_classfile_bytes_read = NULL;
135 PerfCounter* ClassLoader::_sync_systemLoaderLockContentionRate = NULL;
136 PerfCounter* ClassLoader::_sync_nonSystemLoaderLockContentionRate = NULL;
137 PerfCounter* ClassLoader::_sync_JVMFindLoadedClassLockFreeCounter = NULL;
138 PerfCounter* ClassLoader::_sync_JVMDefineClassLockFreeCounter = NULL;
139 PerfCounter* ClassLoader::_sync_JNIDefineClassLockFreeCounter = NULL;
140 PerfCounter* ClassLoader::_unsafe_defineClassCallCounter = 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 #if INCLUDE_CDS
149 ClassPathEntry* ClassLoader::_app_classpath_entries = NULL;
150 ClassPathEntry* ClassLoader::_last_app_classpath_entry = NULL;
151 ClassPathEntry* ClassLoader::_module_path_entries = NULL;
152 ClassPathEntry* ClassLoader::_last_module_path_entry = NULL;
153 SharedPathsMiscInfo* ClassLoader::_shared_paths_misc_info = NULL;
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 PackageEntry* ClassLoader::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 assert((_dir != NULL) && (name != NULL), "sanity");
266 size_t path_len = strlen(_dir) + strlen(name) + strlen(os::file_separator()) + 1;
267 char* path = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, path_len);
268 int len = jio_snprintf(path, path_len, "%s%s%s", _dir, os::file_separator(), name);
269 assert(len == (int)(path_len - 1), "sanity");
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, path_len);
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, path_len);
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 u1* ClassPathZipEntry::open_entry(const char* name, jint* filesize, bool nul_terminate, TRAPS) {
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;
329 jzentry* entry = (*FindEntry)(_zip, name, filesize, &name_len);
330 if (entry == NULL) return NULL;
331 u1* buffer;
332 char name_buf[128];
333 char* filename;
334 if (name_len < 128) {
335 filename = name_buf;
336 } else {
337 filename = NEW_RESOURCE_ARRAY(char, name_len + 1);
338 }
339
340 // read contents into resource array
341 int size = (*filesize) + ((nul_terminate) ? 1 : 0);
342 buffer = NEW_RESOURCE_ARRAY(u1, size);
343 if (!(*ReadEntry)(_zip, entry, buffer, filename)) return NULL;
344
345 // return result
346 if (nul_terminate) {
347 buffer[*filesize] = 0;
348 }
349 return buffer;
350 }
351
352 #if INCLUDE_CDS
353 u1* ClassPathZipEntry::open_versioned_entry(const char* name, jint* filesize, TRAPS) {
354 u1* buffer = NULL;
355 if (DumpSharedSpaces && !_is_boot_append) {
356 // We presume default is multi-release enabled
357 const char* multi_ver = Arguments::get_property("jdk.util.jar.enableMultiRelease");
358 const char* verstr = Arguments::get_property("jdk.util.jar.version");
359 bool is_multi_ver = (multi_ver == NULL ||
360 strcmp(multi_ver, "true") == 0 ||
361 strcmp(multi_ver, "force") == 0) &&
362 is_multiple_versioned(THREAD);
363 // command line version setting
364 int version = 0;
365 const int base_version = 8; // JDK8
366 int cur_ver = JDK_Version::current().major_version();
367 if (verstr != NULL) {
368 version = atoi(verstr);
369 if (version < base_version || version > cur_ver) {
370 // If the specified version is lower than the base version, the base
371 // entry will be used; if the version is higher than the current
372 // jdk version, the highest versioned entry will be used.
373 if (version < base_version) {
374 is_multi_ver = false;
375 }
376 // print out warning, do not use assertion here since it will continue to look
377 // for proper version.
378 warning("JDK%d is not supported in multiple version jars", version);
379 }
380 }
381
382 if (is_multi_ver) {
383 int n;
384 const char* version_entry = "META-INF/versions/";
385 // 10 is the max length of a decimal 32-bit non-negative number
386 // 2 includes the '/' and trailing zero
387 size_t entry_name_len = strlen(version_entry) + 10 + strlen(name) + 2;
388 char* entry_name = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, entry_name_len);
389 if (version > 0) {
390 n = jio_snprintf(entry_name, entry_name_len, "%s%d/%s", version_entry, version, name);
391 entry_name[n] = '\0';
392 buffer = open_entry((const char*)entry_name, filesize, false, CHECK_NULL);
393 if (buffer == NULL) {
394 warning("Could not find %s in %s, try to find highest version instead", entry_name, _zip_name);
395 }
396 }
397 if (buffer == NULL) {
398 for (int i = cur_ver; i >= base_version; i--) {
399 n = jio_snprintf(entry_name, entry_name_len, "%s%d/%s", version_entry, i, name);
400 entry_name[n] = '\0';
401 buffer = open_entry((const char*)entry_name, filesize, false, CHECK_NULL);
402 if (buffer != NULL) {
403 break;
404 }
405 }
406 }
407 FREE_RESOURCE_ARRAY(char, entry_name, entry_name_len);
408 }
409 }
410 return buffer;
411 }
412
413 bool ClassPathZipEntry::is_multiple_versioned(TRAPS) {
414 assert(DumpSharedSpaces, "called only at dump time");
415 if (_multi_versioned != _unknown) {
416 return (_multi_versioned == _yes) ? true : false;
417 }
418 jint size;
419 char* buffer = (char*)open_entry("META-INF/MANIFEST.MF", &size, true, CHECK_false);
420 if (buffer != NULL) {
421 char* p = buffer;
422 for ( ; *p; ++p) *p = tolower(*p);
423 if (strstr(buffer, "multi-release: true") != NULL) {
424 _multi_versioned = _yes;
425 return true;
426 }
427 }
428 _multi_versioned = _no;
429 return false;
430 }
431 #endif // INCLUDE_CDS
432
433 ClassFileStream* ClassPathZipEntry::open_stream(const char* name, TRAPS) {
434 jint filesize;
435 u1* buffer = open_versioned_entry(name, &filesize, CHECK_NULL);
436 if (buffer == NULL) {
437 buffer = open_entry(name, &filesize, false, CHECK_NULL);
438 if (buffer == NULL) {
439 return NULL;
440 }
441 }
442 if (UsePerfData) {
443 ClassLoader::perf_sys_classfile_bytes_read()->inc(filesize);
444 }
445 // Resource allocated
446 return new ClassFileStream(buffer,
447 filesize,
448 _zip_name,
449 ClassFileStream::verify);
450 }
451
452 // invoke function for each entry in the zip file
453 void ClassPathZipEntry::contents_do(void f(const char* name, void* context), void* context) {
454 JavaThread* thread = JavaThread::current();
455 HandleMark handle_mark(thread);
456 ThreadToNativeFromVM ttn(thread);
457 for (int n = 0; ; n++) {
458 jzentry * ze = ((*GetNextEntry)(_zip, n));
459 if (ze == NULL) break;
460 (*f)(ze->name, context);
461 }
462 }
463
464 ClassPathImageEntry::ClassPathImageEntry(JImageFile* jimage, const char* name) :
465 ClassPathEntry(),
466 _jimage(jimage) {
467 guarantee(jimage != NULL, "jimage file is null");
468 guarantee(name != NULL, "jimage file name is null");
469 size_t len = strlen(name) + 1;
470 _name = NEW_C_HEAP_ARRAY(const char, len, mtClass);
471 strncpy((char *)_name, name, len);
472 }
473
474 ClassPathImageEntry::~ClassPathImageEntry() {
475 if (_name != NULL) {
476 FREE_C_HEAP_ARRAY(const char, _name);
477 _name = NULL;
478 }
479 if (_jimage != NULL) {
480 (*JImageClose)(_jimage);
481 _jimage = NULL;
482 }
483 }
484
485 // For a class in a named module, look it up in the jimage file using this syntax:
486 // /<module-name>/<package-name>/<base-class>
487 //
488 // Assumptions:
489 // 1. There are no unnamed modules in the jimage file.
490 // 2. A package is in at most one module in the jimage file.
491 //
492 ClassFileStream* ClassPathImageEntry::open_stream(const char* name, TRAPS) {
493 jlong size;
494 JImageLocationRef location = (*JImageFindResource)(_jimage, "", get_jimage_version_string(), name, &size);
495
496 if (location == 0) {
497 ResourceMark rm;
498 const char* pkg_name = ClassLoader::package_from_name(name);
499
500 if (pkg_name != NULL) {
501 if (!Universe::is_module_initialized()) {
502 location = (*JImageFindResource)(_jimage, JAVA_BASE_NAME, get_jimage_version_string(), name, &size);
503 #if INCLUDE_CDS
504 // CDS uses the boot class loader to load classes whose packages are in
505 // modules defined for other class loaders. So, for now, get their module
506 // names from the "modules" jimage file.
507 if (DumpSharedSpaces && location == 0) {
508 const char* module_name = (*JImagePackageToModule)(_jimage, pkg_name);
509 if (module_name != NULL) {
510 location = (*JImageFindResource)(_jimage, module_name, get_jimage_version_string(), name, &size);
511 }
512 }
513 #endif
514
515 } else {
516 PackageEntry* package_entry = ClassLoader::get_package_entry(name, ClassLoaderData::the_null_class_loader_data(), CHECK_NULL);
517 if (package_entry != NULL) {
518 ResourceMark rm;
519 // Get the module name
520 ModuleEntry* module = package_entry->module();
521 assert(module != NULL, "Boot classLoader package missing module");
522 assert(module->is_named(), "Boot classLoader package is in unnamed module");
523 const char* module_name = module->name()->as_C_string();
524 if (module_name != NULL) {
525 location = (*JImageFindResource)(_jimage, module_name, get_jimage_version_string(), name, &size);
526 }
527 }
528 }
529 }
530 }
531 if (location != 0) {
532 if (UsePerfData) {
533 ClassLoader::perf_sys_classfile_bytes_read()->inc(size);
534 }
535 char* data = NEW_RESOURCE_ARRAY(char, size);
536 (*JImageGetResource)(_jimage, location, data, size);
537 // Resource allocated
538 return new ClassFileStream((u1*)data,
539 (int)size,
540 _name,
541 ClassFileStream::verify);
542 }
543
544 return NULL;
545 }
546
547 JImageLocationRef ClassLoader::jimage_find_resource(JImageFile* jf,
548 const char* module_name,
549 const char* file_name,
550 jlong &size) {
551 return ((*JImageFindResource)(jf, module_name, get_jimage_version_string(), file_name, &size));
552 }
553
554 #ifndef PRODUCT
555 bool ctw_visitor(JImageFile* jimage,
556 const char* module_name, const char* version, const char* package,
557 const char* name, const char* extension, void* arg) {
558 if (strcmp(extension, "class") == 0) {
559 Thread* THREAD = Thread::current();
560 ResourceMark rm(THREAD);
561 char* path = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, JIMAGE_MAX_PATH);
562 jio_snprintf(path, JIMAGE_MAX_PATH - 1, "%s/%s.class", package, name);
563 ClassLoader::compile_the_world_in(path, *(Handle*)arg, THREAD);
564 return !HAS_PENDING_EXCEPTION;
565 }
566 return true;
567 }
568
569 void ClassPathImageEntry::compile_the_world(Handle loader, TRAPS) {
570 tty->print_cr("CompileTheWorld : Compiling all classes in %s", name());
571 tty->cr();
572 (*JImageResourceIterator)(_jimage, (JImageResourceVisitor_t)ctw_visitor, (void *)&loader);
573 if (HAS_PENDING_EXCEPTION) {
574 if (PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())) {
575 CLEAR_PENDING_EXCEPTION;
576 tty->print_cr("\nCompileTheWorld : Ran out of memory\n");
577 tty->print_cr("Increase class metadata storage if a limit was set");
578 } else {
579 tty->print_cr("\nCompileTheWorld : Unexpected exception occurred\n");
580 }
581 }
582 }
583 #endif
584
585 bool ClassPathImageEntry::is_modules_image() const {
586 return ClassLoader::is_modules_image(name());
587 }
588
589 #if INCLUDE_CDS
590 void ClassLoader::exit_with_path_failure(const char* error, const char* message) {
591 assert(DumpSharedSpaces, "only called at dump time");
592 tty->print_cr("Hint: enable -Xlog:class+path=info to diagnose the failure");
593 vm_exit_during_initialization(error, message);
594 }
595 #endif
596
597 ModuleClassPathList::ModuleClassPathList(Symbol* module_name) {
598 _module_name = module_name;
599 _module_first_entry = NULL;
600 _module_last_entry = NULL;
601 }
602
603 ModuleClassPathList::~ModuleClassPathList() {
604 // Clean out each ClassPathEntry on list
605 ClassPathEntry* e = _module_first_entry;
606 while (e != NULL) {
607 ClassPathEntry* next_entry = e->next();
608 delete e;
609 e = next_entry;
610 }
611 }
612
613 void ModuleClassPathList::add_to_list(ClassPathEntry* new_entry) {
614 if (new_entry != NULL) {
615 if (_module_last_entry == NULL) {
616 _module_first_entry = _module_last_entry = new_entry;
617 } else {
618 _module_last_entry->set_next(new_entry);
619 _module_last_entry = new_entry;
620 }
621 }
622 }
623
624 void ClassLoader::trace_class_path(const char* msg, const char* name) {
625 LogTarget(Info, class, path) lt;
626 if (lt.is_enabled()) {
627 LogStream ls(lt);
628 if (msg) {
629 ls.print("%s", msg);
630 }
631 if (name) {
632 if (strlen(name) < 256) {
633 ls.print("%s", name);
634 } else {
635 // For very long paths, we need to print each character separately,
636 // as print_cr() has a length limit
637 while (name[0] != '\0') {
638 ls.print("%c", name[0]);
639 name++;
640 }
641 }
642 }
643 ls.cr();
644 }
645 }
646
647 #if INCLUDE_CDS
648 void ClassLoader::check_shared_classpath(const char *path) {
649 if (strcmp(path, "") == 0) {
650 exit_with_path_failure("Cannot have empty path in archived classpaths", NULL);
651 }
652
653 struct stat st;
654 if (os::stat(path, &st) == 0) {
655 if ((st.st_mode & S_IFMT) != S_IFREG) { // is not a regular file
656 if (!os::dir_is_empty(path)) {
657 tty->print_cr("Error: non-empty directory '%s'", path);
658 exit_with_path_failure("CDS allows only empty directories in archived classpaths", NULL);
659 }
660 }
661 }
662 }
663 #endif
664
665 void ClassLoader::setup_bootstrap_search_path() {
666 const char* sys_class_path = Arguments::get_sysclasspath();
667 if (PrintSharedArchiveAndExit) {
668 // Don't print sys_class_path - this is the bootcp of this current VM process, not necessarily
669 // the same as the bootcp of the shared archive.
670 } else {
671 trace_class_path("bootstrap loader class path=", sys_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_boot_search_path(sys_class_path);
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
697 void ClassLoader::setup_app_search_path(const char *class_path) {
698
699 assert(DumpSharedSpaces, "Sanity");
700
701 Thread* THREAD = Thread::current();
702 int len = (int)strlen(class_path);
703 int end = 0;
704
705 // Iterate over class path entries
706 for (int start = 0; start < len; start = end) {
707 while (class_path[end] && class_path[end] != os::path_separator()[0]) {
708 end++;
709 }
710 EXCEPTION_MARK;
711 ResourceMark rm(THREAD);
712 char* path = NEW_RESOURCE_ARRAY(char, end - start + 1);
713 strncpy(path, &class_path[start], end - start);
714 path[end - start] = '\0';
715
716 check_shared_classpath(path);
717
718 update_class_path_entry_list(path, false, false);
719
720 while (class_path[end] == os::path_separator()[0]) {
721 end++;
722 }
723 }
724 }
725
726 void ClassLoader::add_to_module_path_entries(const char* path,
727 ClassPathEntry* entry) {
728 assert(entry != NULL, "ClassPathEntry should not be NULL");
729 assert(DumpSharedSpaces, "dump time only");
730
731 // The entry does not exist, add to the list
732 if (_module_path_entries == NULL) {
733 assert(_last_module_path_entry == NULL, "Sanity");
734 _module_path_entries = _last_module_path_entry = entry;
735 } else {
736 _last_module_path_entry->set_next(entry);
737 _last_module_path_entry = entry;
738 }
739 }
740
741 // Add a module path to the _module_path_entries list.
742 void ClassLoader::update_module_path_entry_list(const char *path,
743 bool throw_exception) {
744 assert(DumpSharedSpaces, "dump time only");
745 struct stat st;
746 int ret = os::stat(path, &st);
747 assert(ret == 0, "module path must exist");
748 // File or directory found
749 ClassPathEntry* new_entry = NULL;
750 Thread* THREAD = Thread::current();
751 new_entry = create_class_path_entry(path, &st, throw_exception,
752 false /*is_boot_append */, CHECK);
753 if (new_entry == NULL) {
754 return;
755 }
756
757 add_to_module_path_entries(path, new_entry);
758 return;
759 }
760
761 void ClassLoader::setup_module_search_path(const char* path) {
762 check_shared_classpath(path);
763 update_module_path_entry_list(path);
764 }
765 #endif // INCLUDE_CDS
766
767 // Construct the array of module/path pairs as specified to --patch-module
768 // for the boot loader to search ahead of the jimage, if the class being
769 // loaded is defined to a module that has been specified to --patch-module.
770 void ClassLoader::setup_patch_mod_entries() {
771 Thread* THREAD = Thread::current();
772 GrowableArray<ModulePatchPath*>* patch_mod_args = Arguments::get_patch_mod_prefix();
773 int num_of_entries = patch_mod_args->length();
774
775
776 // Set up the boot loader's _patch_mod_entries list
777 _patch_mod_entries = new (ResourceObj::C_HEAP, mtModule) GrowableArray<ModuleClassPathList*>(num_of_entries, true);
778
779 for (int i = 0; i < num_of_entries; i++) {
780 const char* module_name = (patch_mod_args->at(i))->module_name();
781 Symbol* const module_sym = SymbolTable::lookup(module_name, (int)strlen(module_name), CHECK);
782 assert(module_sym != NULL, "Failed to obtain Symbol for module name");
783 ModuleClassPathList* module_cpl = new ModuleClassPathList(module_sym);
784
785 char* class_path = (patch_mod_args->at(i))->path_string();
786 int len = (int)strlen(class_path);
787 int end = 0;
788 // Iterate over the module's class path entries
789 for (int start = 0; start < len; start = end) {
790 while (class_path[end] && class_path[end] != os::path_separator()[0]) {
791 end++;
792 }
793 EXCEPTION_MARK;
794 ResourceMark rm(THREAD);
795 char* path = NEW_RESOURCE_ARRAY(char, end - start + 1);
796 strncpy(path, &class_path[start], end - start);
797 path[end - start] = '\0';
798
799 struct stat st;
800 if (os::stat(path, &st) == 0) {
801 // File or directory found
802 Thread* THREAD = Thread::current();
803 ClassPathEntry* new_entry = create_class_path_entry(path, &st, false, false, CHECK);
804 // If the path specification is valid, enter it into this module's list
805 if (new_entry != NULL) {
806 module_cpl->add_to_list(new_entry);
807 }
808 }
809
810 while (class_path[end] == os::path_separator()[0]) {
811 end++;
812 }
813 }
814
815 // Record the module into the list of --patch-module entries only if
816 // valid ClassPathEntrys have been created
817 if (module_cpl->module_first_entry() != NULL) {
818 _patch_mod_entries->push(module_cpl);
819 }
820 }
821 }
822
823 // Determine whether the module has been patched via the command-line
824 // option --patch-module
825 bool ClassLoader::is_in_patch_mod_entries(Symbol* module_name) {
826 if (_patch_mod_entries != NULL && _patch_mod_entries->is_nonempty()) {
827 int table_len = _patch_mod_entries->length();
828 for (int i = 0; i < table_len; i++) {
829 ModuleClassPathList* patch_mod = _patch_mod_entries->at(i);
830 if (module_name->fast_compare(patch_mod->module_name()) == 0) {
831 return true;
832 }
833 }
834 }
835 return false;
836 }
837
838 // Set up the _jrt_entry if present and boot append path
839 void ClassLoader::setup_boot_search_path(const char *class_path) {
840 int len = (int)strlen(class_path);
841 int end = 0;
842 bool set_base_piece = true;
843
844 #if INCLUDE_CDS
845 if (DumpSharedSpaces) {
846 if (!Arguments::has_jimage()) {
847 vm_exit_during_initialization("CDS is not supported in exploded JDK build", NULL);
848 }
849 }
850 #endif
851
852 // Iterate over class path entries
853 for (int start = 0; start < len; start = end) {
854 while (class_path[end] && class_path[end] != os::path_separator()[0]) {
855 end++;
856 }
857 EXCEPTION_MARK;
858 ResourceMark rm(THREAD);
859 char* path = NEW_RESOURCE_ARRAY(char, end - start + 1);
860 strncpy(path, &class_path[start], end - start);
861 path[end - start] = '\0';
862
863 if (set_base_piece) {
864 // The first time through the bootstrap_search setup, it must be determined
865 // what the base or core piece of the boot loader search is. Either a java runtime
866 // image is present or this is an exploded module build situation.
867 assert(string_ends_with(path, MODULES_IMAGE_NAME) || string_ends_with(path, JAVA_BASE_NAME),
868 "Incorrect boot loader search path, no java runtime image or " JAVA_BASE_NAME " exploded build");
869 struct stat st;
870 if (os::stat(path, &st) == 0) {
871 // Directory found
872 Thread* THREAD = Thread::current();
873 ClassPathEntry* new_entry = create_class_path_entry(path, &st, false, false, CHECK);
874
875 // Check for a jimage
876 if (Arguments::has_jimage()) {
877 assert(_jrt_entry == NULL, "should not setup bootstrap class search path twice");
878 assert(new_entry != NULL && new_entry->is_modules_image(), "No java runtime image present");
879 _jrt_entry = new_entry;
880 assert(_jrt_entry->jimage() != NULL, "No java runtime image");
881 }
882 } else {
883 // If path does not exist, exit
884 vm_exit_during_initialization("Unable to establish the boot loader search path", path);
885 }
886 set_base_piece = false;
887 } else {
888 // Every entry on the system boot class path after the initial base piece,
889 // which is set by os::set_boot_path(), is considered an appended entry.
890 update_class_path_entry_list(path, false, true);
891 }
892
893 #if INCLUDE_CDS
894 if (DumpSharedSpaces) {
895 check_shared_classpath(path);
896 }
897 #endif
898 while (class_path[end] == os::path_separator()[0]) {
899 end++;
900 }
901 }
902 }
903
904 // During an exploded modules build, each module defined to the boot loader
905 // will be added to the ClassLoader::_exploded_entries array.
906 void ClassLoader::add_to_exploded_build_list(Symbol* module_sym, TRAPS) {
907 assert(!ClassLoader::has_jrt_entry(), "Exploded build not applicable");
908 assert(_exploded_entries != NULL, "_exploded_entries was not initialized");
909
910 // Find the module's symbol
911 ResourceMark rm(THREAD);
912 const char *module_name = module_sym->as_C_string();
913 const char *home = Arguments::get_java_home();
914 const char file_sep = os::file_separator()[0];
915 // 10 represents the length of "modules" + 2 file separators + \0
916 size_t len = strlen(home) + strlen(module_name) + 10;
917 char *path = NEW_C_HEAP_ARRAY(char, len, mtModule);
918 jio_snprintf(path, len, "%s%cmodules%c%s", home, file_sep, file_sep, module_name);
919
920 struct stat st;
921 if (os::stat(path, &st) == 0) {
922 // Directory found
923 ClassPathEntry* new_entry = create_class_path_entry(path, &st, false, false, CHECK);
924
925 // If the path specification is valid, enter it into this module's list.
926 // There is no need to check for duplicate modules in the exploded entry list,
927 // since no two modules with the same name can be defined to the boot loader.
928 // This is checked at module definition time in Modules::define_module.
929 if (new_entry != NULL) {
930 ModuleClassPathList* module_cpl = new ModuleClassPathList(module_sym);
931 module_cpl->add_to_list(new_entry);
932 {
933 MutexLocker ml(Module_lock, THREAD);
934 _exploded_entries->push(module_cpl);
935 }
936 log_info(class, load)("path: %s", path);
937 }
938 }
939 FREE_C_HEAP_ARRAY(char, path);
940 }
941
942 ClassPathEntry* ClassLoader::create_class_path_entry(const char *path, const struct stat* st,
943 bool throw_exception,
944 bool is_boot_append, TRAPS) {
945 JavaThread* thread = JavaThread::current();
946 ClassPathEntry* new_entry = NULL;
947 if ((st->st_mode & S_IFMT) == S_IFREG) {
948 ResourceMark rm(thread);
949 // Regular file, should be a zip or jimage file
950 // Canonicalized filename
951 char* canonical_path = NEW_RESOURCE_ARRAY_IN_THREAD(thread, char, JVM_MAXPATHLEN);
952 if (!get_canonical_path(path, canonical_path, JVM_MAXPATHLEN)) {
953 // This matches the classic VM
954 if (throw_exception) {
955 THROW_MSG_(vmSymbols::java_io_IOException(), "Bad pathname", NULL);
956 } else {
957 return NULL;
958 }
959 }
960 jint error;
961 JImageFile* jimage =(*JImageOpen)(canonical_path, &error);
962 if (jimage != NULL) {
963 new_entry = new ClassPathImageEntry(jimage, canonical_path);
964 } else {
965 char* error_msg = NULL;
966 jzfile* zip;
967 {
968 // enable call to C land
969 ThreadToNativeFromVM ttn(thread);
970 HandleMark hm(thread);
971 zip = (*ZipOpen)(canonical_path, &error_msg);
972 }
973 if (zip != NULL && error_msg == NULL) {
974 new_entry = new ClassPathZipEntry(zip, path, is_boot_append);
975 } else {
976 char *msg;
977 if (error_msg == NULL) {
978 msg = NEW_RESOURCE_ARRAY_IN_THREAD(thread, char, strlen(path) + 128); ;
979 jio_snprintf(msg, strlen(path) + 127, "error in opening JAR file %s", path);
980 } else {
981 int len = (int)(strlen(path) + strlen(error_msg) + 128);
982 msg = NEW_RESOURCE_ARRAY_IN_THREAD(thread, char, len); ;
983 jio_snprintf(msg, len - 1, "error in opening JAR file <%s> %s", error_msg, path);
984 }
985 // Don't complain about bad jar files added via -Xbootclasspath/a:.
986 if (throw_exception && is_init_completed()) {
987 THROW_MSG_(vmSymbols::java_lang_ClassNotFoundException(), msg, NULL);
988 } else {
989 return NULL;
990 }
991 }
992 }
993 log_info(class, path)("opened: %s", path);
994 log_info(class, load)("opened: %s", path);
995 } else {
996 // Directory
997 new_entry = new ClassPathDirEntry(path);
998 log_info(class, load)("path: %s", path);
999 }
1000 return new_entry;
1001 }
1002
1003
1004 // Create a class path zip entry for a given path (return NULL if not found
1005 // or zip/JAR file cannot be opened)
1006 ClassPathZipEntry* ClassLoader::create_class_path_zip_entry(const char *path, bool is_boot_append) {
1007 // check for a regular file
1008 struct stat st;
1009 if (os::stat(path, &st) == 0) {
1010 if ((st.st_mode & S_IFMT) == S_IFREG) {
1011 char canonical_path[JVM_MAXPATHLEN];
1012 if (get_canonical_path(path, canonical_path, JVM_MAXPATHLEN)) {
1013 char* error_msg = NULL;
1014 jzfile* zip;
1015 {
1016 // enable call to C land
1017 JavaThread* thread = JavaThread::current();
1018 ThreadToNativeFromVM ttn(thread);
1019 HandleMark hm(thread);
1020 zip = (*ZipOpen)(canonical_path, &error_msg);
1021 }
1022 if (zip != NULL && error_msg == NULL) {
1023 // create using canonical path
1024 return new ClassPathZipEntry(zip, canonical_path, is_boot_append);
1025 }
1026 }
1027 }
1028 }
1029 return NULL;
1030 }
1031
1032 // returns true if entry already on class path
1033 bool ClassLoader::contains_append_entry(const char* name) {
1034 ClassPathEntry* e = _first_append_entry;
1035 while (e != NULL) {
1036 // assume zip entries have been canonicalized
1037 if (strcmp(name, e->name()) == 0) {
1038 return true;
1039 }
1040 e = e->next();
1041 }
1042 return false;
1043 }
1044
1045 void ClassLoader::add_to_boot_append_entries(ClassPathEntry *new_entry) {
1046 if (new_entry != NULL) {
1047 if (_last_append_entry == NULL) {
1048 assert(_first_append_entry == NULL, "boot loader's append class path entry list not empty");
1049 _first_append_entry = _last_append_entry = new_entry;
1050 } else {
1051 _last_append_entry->set_next(new_entry);
1052 _last_append_entry = new_entry;
1053 }
1054 }
1055 }
1056
1057 // Record the path entries specified in -cp during dump time. The recorded
1058 // information will be used at runtime for loading the archived app classes.
1059 //
1060 // Note that at dump time, ClassLoader::_app_classpath_entries are NOT used for
1061 // loading app classes. Instead, the app class are loaded by the
1062 // jdk/internal/loader/ClassLoaders$AppClassLoader instance.
1063 void ClassLoader::add_to_app_classpath_entries(const char* path,
1064 ClassPathEntry* entry,
1065 bool check_for_duplicates) {
1066 #if INCLUDE_CDS
1067 assert(entry != NULL, "ClassPathEntry should not be NULL");
1068 ClassPathEntry* e = _app_classpath_entries;
1069 if (check_for_duplicates) {
1070 while (e != NULL) {
1071 if (strcmp(e->name(), entry->name()) == 0) {
1072 // entry already exists
1073 return;
1074 }
1075 e = e->next();
1076 }
1077 }
1078
1079 // The entry does not exist, add to the list
1080 if (_app_classpath_entries == NULL) {
1081 assert(_last_app_classpath_entry == NULL, "Sanity");
1082 _app_classpath_entries = _last_app_classpath_entry = entry;
1083 } else {
1084 _last_app_classpath_entry->set_next(entry);
1085 _last_app_classpath_entry = entry;
1086 }
1087
1088 if (entry->is_jar_file()) {
1089 ClassLoaderExt::process_jar_manifest(entry, check_for_duplicates);
1090 } else {
1091 if (!os::dir_is_empty(path)) {
1092 tty->print_cr("Error: non-empty directory '%s'", path);
1093 exit_with_path_failure("Cannot have non-empty directory in app classpaths", NULL);
1094 }
1095 }
1096 #endif
1097 }
1098
1099 // Returns true IFF the file/dir exists and the entry was successfully created.
1100 bool ClassLoader::update_class_path_entry_list(const char *path,
1101 bool check_for_duplicates,
1102 bool is_boot_append,
1103 bool throw_exception) {
1104 struct stat st;
1105 if (os::stat(path, &st) == 0) {
1106 // File or directory found
1107 ClassPathEntry* new_entry = NULL;
1108 Thread* THREAD = Thread::current();
1109 new_entry = create_class_path_entry(path, &st, throw_exception, is_boot_append, CHECK_(false));
1110 if (new_entry == NULL) {
1111 return false;
1112 }
1113
1114 // Do not reorder the bootclasspath which would break get_system_package().
1115 // Add new entry to linked list
1116 if (is_boot_append) {
1117 add_to_boot_append_entries(new_entry);
1118 } else {
1119 add_to_app_classpath_entries(path, new_entry, check_for_duplicates);
1120 }
1121 return true;
1122 } else {
1123 #if INCLUDE_CDS
1124 if (DumpSharedSpaces) {
1125 _shared_paths_misc_info->add_nonexist_path(path);
1126 }
1127 #endif
1128 return false;
1129 }
1130 }
1131
1132 static void print_module_entry_table(const GrowableArray<ModuleClassPathList*>* const module_list) {
1133 ResourceMark rm;
1134 int num_of_entries = module_list->length();
1135 for (int i = 0; i < num_of_entries; i++) {
1136 ClassPathEntry* e;
1137 ModuleClassPathList* mpl = module_list->at(i);
1138 tty->print("%s=", mpl->module_name()->as_C_string());
1139 e = mpl->module_first_entry();
1140 while (e != NULL) {
1141 tty->print("%s", e->name());
1142 e = e->next();
1143 if (e != NULL) {
1144 tty->print("%s", os::path_separator());
1145 }
1146 }
1147 tty->print(" ;");
1148 }
1149 }
1150
1151 void ClassLoader::print_bootclasspath() {
1152 ClassPathEntry* e;
1153 tty->print("[bootclasspath= ");
1154
1155 // Print --patch-module module/path specifications first
1156 if (_patch_mod_entries != NULL) {
1157 print_module_entry_table(_patch_mod_entries);
1158 }
1159
1160 // [jimage | exploded modules build]
1161 if (has_jrt_entry()) {
1162 // Print the location of the java runtime image
1163 tty->print("%s ;", _jrt_entry->name());
1164 } else {
1165 // Print exploded module build path specifications
1166 if (_exploded_entries != NULL) {
1167 print_module_entry_table(_exploded_entries);
1168 }
1169 }
1170
1171 // appended entries
1172 e = _first_append_entry;
1173 while (e != NULL) {
1174 tty->print("%s ;", e->name());
1175 e = e->next();
1176 }
1177 tty->print_cr("]");
1178 }
1179
1180 void ClassLoader::load_zip_library() {
1181 assert(ZipOpen == NULL, "should not load zip library twice");
1182 // First make sure native library is loaded
1183 os::native_java_library();
1184 // Load zip library
1185 char path[JVM_MAXPATHLEN];
1186 char ebuf[1024];
1187 void* handle = NULL;
1188 if (os::dll_locate_lib(path, sizeof(path), Arguments::get_dll_dir(), "zip")) {
1189 handle = os::dll_load(path, ebuf, sizeof ebuf);
1190 }
1191 if (handle == NULL) {
1192 vm_exit_during_initialization("Unable to load ZIP library", path);
1193 }
1194 // Lookup zip entry points
1195 ZipOpen = CAST_TO_FN_PTR(ZipOpen_t, os::dll_lookup(handle, "ZIP_Open"));
1196 ZipClose = CAST_TO_FN_PTR(ZipClose_t, os::dll_lookup(handle, "ZIP_Close"));
1197 FindEntry = CAST_TO_FN_PTR(FindEntry_t, os::dll_lookup(handle, "ZIP_FindEntry"));
1198 ReadEntry = CAST_TO_FN_PTR(ReadEntry_t, os::dll_lookup(handle, "ZIP_ReadEntry"));
1199 GetNextEntry = CAST_TO_FN_PTR(GetNextEntry_t, os::dll_lookup(handle, "ZIP_GetNextEntry"));
1200 ZipInflateFully = CAST_TO_FN_PTR(ZipInflateFully_t, os::dll_lookup(handle, "ZIP_InflateFully"));
1201 Crc32 = CAST_TO_FN_PTR(Crc32_t, os::dll_lookup(handle, "ZIP_CRC32"));
1202
1203 // ZIP_Close is not exported on Windows in JDK5.0 so don't abort if ZIP_Close is NULL
1204 if (ZipOpen == NULL || FindEntry == NULL || ReadEntry == NULL ||
1205 GetNextEntry == NULL || Crc32 == NULL) {
1206 vm_exit_during_initialization("Corrupted ZIP library", path);
1207 }
1208
1209 if (ZipInflateFully == NULL) {
1210 vm_exit_during_initialization("Corrupted ZIP library ZIP_InflateFully missing", path);
1211 }
1212
1213 // Lookup canonicalize entry in libjava.dll
1214 void *javalib_handle = os::native_java_library();
1215 CanonicalizeEntry = CAST_TO_FN_PTR(canonicalize_fn_t, os::dll_lookup(javalib_handle, "Canonicalize"));
1216 // This lookup only works on 1.3. Do not check for non-null here
1217 }
1218
1219 void ClassLoader::load_jimage_library() {
1220 // First make sure native library is loaded
1221 os::native_java_library();
1222 // Load jimage library
1223 char path[JVM_MAXPATHLEN];
1224 char ebuf[1024];
1225 void* handle = NULL;
1226 if (os::dll_locate_lib(path, sizeof(path), Arguments::get_dll_dir(), "jimage")) {
1227 handle = os::dll_load(path, ebuf, sizeof ebuf);
1228 }
1229 if (handle == NULL) {
1230 vm_exit_during_initialization("Unable to load jimage library", path);
1231 }
1232
1233 // Lookup jimage entry points
1234 JImageOpen = CAST_TO_FN_PTR(JImageOpen_t, os::dll_lookup(handle, "JIMAGE_Open"));
1235 guarantee(JImageOpen != NULL, "function JIMAGE_Open not found");
1236 JImageClose = CAST_TO_FN_PTR(JImageClose_t, os::dll_lookup(handle, "JIMAGE_Close"));
1237 guarantee(JImageClose != NULL, "function JIMAGE_Close not found");
1238 JImagePackageToModule = CAST_TO_FN_PTR(JImagePackageToModule_t, os::dll_lookup(handle, "JIMAGE_PackageToModule"));
1239 guarantee(JImagePackageToModule != NULL, "function JIMAGE_PackageToModule not found");
1240 JImageFindResource = CAST_TO_FN_PTR(JImageFindResource_t, os::dll_lookup(handle, "JIMAGE_FindResource"));
1241 guarantee(JImageFindResource != NULL, "function JIMAGE_FindResource not found");
1242 JImageGetResource = CAST_TO_FN_PTR(JImageGetResource_t, os::dll_lookup(handle, "JIMAGE_GetResource"));
1243 guarantee(JImageGetResource != NULL, "function JIMAGE_GetResource not found");
1244 JImageResourceIterator = CAST_TO_FN_PTR(JImageResourceIterator_t, os::dll_lookup(handle, "JIMAGE_ResourceIterator"));
1245 guarantee(JImageResourceIterator != NULL, "function JIMAGE_ResourceIterator not found");
1246 JImageResourcePath = CAST_TO_FN_PTR(JImage_ResourcePath_t, os::dll_lookup(handle, "JIMAGE_ResourcePath"));
1247 guarantee(JImageResourcePath != NULL, "function JIMAGE_ResourcePath not found");
1248 }
1249
1250 jboolean ClassLoader::decompress(void *in, u8 inSize, void *out, u8 outSize, char **pmsg) {
1251 return (*ZipInflateFully)(in, inSize, out, outSize, pmsg);
1252 }
1253
1254 int ClassLoader::crc32(int crc, const char* buf, int len) {
1255 assert(Crc32 != NULL, "ZIP_CRC32 is not found");
1256 return (*Crc32)(crc, (const jbyte*)buf, len);
1257 }
1258
1259 // Function add_package extracts the package from the fully qualified class name
1260 // and checks if the package is in the boot loader's package entry table. If so,
1261 // then it sets the classpath_index in the package entry record.
1262 //
1263 // The classpath_index field is used to find the entry on the boot loader class
1264 // path for packages with classes loaded by the boot loader from -Xbootclasspath/a
1265 // in an unnamed module. It is also used to indicate (for all packages whose
1266 // classes are loaded by the boot loader) that at least one of the package's
1267 // classes has been loaded.
1268 bool ClassLoader::add_package(const char *fullq_class_name, s2 classpath_index, TRAPS) {
1269 assert(fullq_class_name != NULL, "just checking");
1270
1271 // Get package name from fully qualified class name.
1272 ResourceMark rm;
1273 const char *cp = package_from_name(fullq_class_name);
1274 if (cp != NULL) {
1275 PackageEntryTable* pkg_entry_tbl = ClassLoaderData::the_null_class_loader_data()->packages();
1276 TempNewSymbol pkg_symbol = SymbolTable::new_symbol(cp, CHECK_false);
1277 PackageEntry* pkg_entry = pkg_entry_tbl->lookup_only(pkg_symbol);
1278 if (pkg_entry != NULL) {
1279 assert(classpath_index != -1, "Unexpected classpath_index");
1280 pkg_entry->set_classpath_index(classpath_index);
1281 } else {
1282 return false;
1283 }
1284 }
1285 return true;
1286 }
1287
1288 oop ClassLoader::get_system_package(const char* name, TRAPS) {
1289 // Look up the name in the boot loader's package entry table.
1290 if (name != NULL) {
1291 TempNewSymbol package_sym = SymbolTable::new_symbol(name, (int)strlen(name), CHECK_NULL);
1292 // Look for the package entry in the boot loader's package entry table.
1293 PackageEntry* package =
1294 ClassLoaderData::the_null_class_loader_data()->packages()->lookup_only(package_sym);
1295
1296 // Return NULL if package does not exist or if no classes in that package
1297 // have been loaded.
1298 if (package != NULL && package->has_loaded_class()) {
1299 ModuleEntry* module = package->module();
1300 if (module->location() != NULL) {
1301 ResourceMark rm(THREAD);
1302 Handle ml = java_lang_String::create_from_str(
1303 module->location()->as_C_string(), THREAD);
1304 return ml();
1305 }
1306 // Return entry on boot loader class path.
1307 Handle cph = java_lang_String::create_from_str(
1308 ClassLoader::classpath_entry(package->classpath_index())->name(), THREAD);
1309 return cph();
1310 }
1311 }
1312 return NULL;
1313 }
1314
1315 objArrayOop ClassLoader::get_system_packages(TRAPS) {
1316 ResourceMark rm(THREAD);
1317 // List of pointers to PackageEntrys that have loaded classes.
1318 GrowableArray<PackageEntry*>* loaded_class_pkgs = new GrowableArray<PackageEntry*>(50);
1319 {
1320 MutexLocker ml(Module_lock, THREAD);
1321
1322 PackageEntryTable* pe_table =
1323 ClassLoaderData::the_null_class_loader_data()->packages();
1324
1325 // Collect the packages that have at least one loaded class.
1326 for (int x = 0; x < pe_table->table_size(); x++) {
1327 for (PackageEntry* package_entry = pe_table->bucket(x);
1328 package_entry != NULL;
1329 package_entry = package_entry->next()) {
1330 if (package_entry->has_loaded_class()) {
1331 loaded_class_pkgs->append(package_entry);
1332 }
1333 }
1334 }
1335 }
1336
1337
1338 // Allocate objArray and fill with java.lang.String
1339 objArrayOop r = oopFactory::new_objArray(SystemDictionary::String_klass(),
1340 loaded_class_pkgs->length(), CHECK_NULL);
1341 objArrayHandle result(THREAD, r);
1342 for (int x = 0; x < loaded_class_pkgs->length(); x++) {
1343 PackageEntry* package_entry = loaded_class_pkgs->at(x);
1344 Handle str = java_lang_String::create_from_symbol(package_entry->name(), CHECK_NULL);
1345 result->obj_at_put(x, str());
1346 }
1347 return result();
1348 }
1349
1350 // caller needs ResourceMark
1351 const char* ClassLoader::file_name_for_class_name(const char* class_name,
1352 int class_name_len) {
1353 assert(class_name != NULL, "invariant");
1354 assert((int)strlen(class_name) == class_name_len, "invariant");
1355
1356 static const char class_suffix[] = ".class";
1357
1358 char* const file_name = NEW_RESOURCE_ARRAY(char,
1359 class_name_len +
1360 sizeof(class_suffix)); // includes term NULL
1361
1362 strncpy(file_name, class_name, class_name_len);
1363 strncpy(&file_name[class_name_len], class_suffix, sizeof(class_suffix));
1364
1365 return file_name;
1366 }
1367
1368 ClassPathEntry* find_first_module_cpe(ModuleEntry* mod_entry,
1369 const GrowableArray<ModuleClassPathList*>* const module_list) {
1370 int num_of_entries = module_list->length();
1371 const Symbol* class_module_name = mod_entry->name();
1372
1373 // Loop through all the modules in either the patch-module or exploded entries looking for module
1374 for (int i = 0; i < num_of_entries; i++) {
1375 ModuleClassPathList* module_cpl = module_list->at(i);
1376 Symbol* module_cpl_name = module_cpl->module_name();
1377
1378 if (module_cpl_name->fast_compare(class_module_name) == 0) {
1379 // Class' module has been located.
1380 return module_cpl->module_first_entry();
1381 }
1382 }
1383 return NULL;
1384 }
1385
1386
1387 // Search either the patch-module or exploded build entries for class.
1388 ClassFileStream* ClassLoader::search_module_entries(const GrowableArray<ModuleClassPathList*>* const module_list,
1389 const char* const class_name,
1390 const char* const file_name,
1391 TRAPS) {
1392 ClassFileStream* stream = NULL;
1393
1394 // Find the class' defining module in the boot loader's module entry table
1395 PackageEntry* pkg_entry = get_package_entry(class_name, ClassLoaderData::the_null_class_loader_data(), CHECK_NULL);
1396 ModuleEntry* mod_entry = (pkg_entry != NULL) ? pkg_entry->module() : NULL;
1397
1398 // If the module system has not defined java.base yet, then
1399 // classes loaded are assumed to be defined to java.base.
1400 // When java.base is eventually defined by the module system,
1401 // all packages of classes that have been previously loaded
1402 // are verified in ModuleEntryTable::verify_javabase_packages().
1403 if (!Universe::is_module_initialized() &&
1404 !ModuleEntryTable::javabase_defined() &&
1405 mod_entry == NULL) {
1406 mod_entry = ModuleEntryTable::javabase_moduleEntry();
1407 }
1408
1409 // The module must be a named module
1410 ClassPathEntry* e = NULL;
1411 if (mod_entry != NULL && mod_entry->is_named()) {
1412 if (module_list == _exploded_entries) {
1413 // The exploded build entries can be added to at any time so a lock is
1414 // needed when searching them.
1415 assert(!ClassLoader::has_jrt_entry(), "Must be exploded build");
1416 MutexLocker ml(Module_lock, THREAD);
1417 e = find_first_module_cpe(mod_entry, module_list);
1418 } else {
1419 e = find_first_module_cpe(mod_entry, module_list);
1420 }
1421 }
1422
1423 // Try to load the class from the module's ClassPathEntry list.
1424 while (e != NULL) {
1425 stream = e->open_stream(file_name, CHECK_NULL);
1426 // No context.check is required since CDS is not supported
1427 // for an exploded modules build or if --patch-module is specified.
1428 if (NULL != stream) {
1429 return stream;
1430 }
1431 e = e->next();
1432 }
1433 // If the module was located, break out even if the class was not
1434 // located successfully from that module's ClassPathEntry list.
1435 // There will not be another valid entry for that module.
1436 return NULL;
1437 }
1438
1439 // Called by the boot classloader to load classes
1440 InstanceKlass* ClassLoader::load_class(Symbol* name, bool search_append_only, TRAPS) {
1441 assert(name != NULL, "invariant");
1442 assert(THREAD->is_Java_thread(), "must be a JavaThread");
1443
1444 ResourceMark rm(THREAD);
1445 HandleMark hm(THREAD);
1446
1447 const char* const class_name = name->as_C_string();
1448
1449 EventMark m("loading class %s", class_name);
1450
1451 const char* const file_name = file_name_for_class_name(class_name,
1452 name->utf8_length());
1453 assert(file_name != NULL, "invariant");
1454
1455 ClassLoaderExt::Context context(class_name, file_name, THREAD);
1456
1457 // Lookup stream for parsing .class file
1458 ClassFileStream* stream = NULL;
1459 s2 classpath_index = 0;
1460 ClassPathEntry* e = NULL;
1461
1462 // If DumpSharedSpaces is true boot loader visibility boundaries are set to:
1463 // - [jimage] + [_first_append_entry to _last_append_entry] (all path entries).
1464 //
1465 // If search_append_only is true, boot loader visibility boundaries are
1466 // set to be _first_append_entry to the end. This includes:
1467 // [-Xbootclasspath/a]; [jvmti appended entries]
1468 //
1469 // If both DumpSharedSpaces and search_append_only are false, boot loader
1470 // visibility boundaries are set to be the --patch-module entries plus the base piece.
1471 // This would include:
1472 // [--patch-module=<module>=<file>(<pathsep><file>)*]; [jimage | exploded module build]
1473 //
1474
1475 // Load Attempt #1: --patch-module
1476 // Determine the class' defining module. If it appears in the _patch_mod_entries,
1477 // attempt to load the class from those locations specific to the module.
1478 // Specifications to --patch-module can contain a partial number of classes
1479 // that are part of the overall module definition. So if a particular class is not
1480 // found within its module specification, the search should continue to Load Attempt #2.
1481 // Note: The --patch-module entries are never searched if the boot loader's
1482 // visibility boundary is limited to only searching the append entries.
1483 if (_patch_mod_entries != NULL && !search_append_only) {
1484 // At CDS dump time, the --patch-module entries are ignored. That means a
1485 // class is still loaded from the runtime image even if it might
1486 // appear in the _patch_mod_entries. The runtime shared class visibility
1487 // check will determine if a shared class is visible based on the runtime
1488 // environemnt, including the runtime --patch-module setting.
1489 if (!DumpSharedSpaces) {
1490 stream = search_module_entries(_patch_mod_entries, class_name, file_name, CHECK_NULL);
1491 }
1492 }
1493
1494 // Load Attempt #2: [jimage | exploded build]
1495 if (!search_append_only && (NULL == stream)) {
1496 if (has_jrt_entry()) {
1497 e = _jrt_entry;
1498 stream = _jrt_entry->open_stream(file_name, CHECK_NULL);
1499 } else {
1500 // Exploded build - attempt to locate class in its defining module's location.
1501 assert(_exploded_entries != NULL, "No exploded build entries present");
1502 stream = search_module_entries(_exploded_entries, class_name, file_name, CHECK_NULL);
1503 }
1504 }
1505
1506 // Load Attempt #3: [-Xbootclasspath/a]; [jvmti appended entries]
1507 if ((search_append_only || DumpSharedSpaces) && (NULL == stream)) {
1508 // For the boot loader append path search, the starting classpath_index
1509 // for the appended piece is always 1 to account for either the
1510 // _jrt_entry or the _exploded_entries.
1511 assert(classpath_index == 0, "The classpath_index has been incremented incorrectly");
1512 classpath_index = 1;
1513
1514 e = _first_append_entry;
1515 while (e != NULL) {
1516 stream = e->open_stream(file_name, CHECK_NULL);
1517 if (NULL != stream) {
1518 break;
1519 }
1520 e = e->next();
1521 ++classpath_index;
1522 }
1523 }
1524
1525 if (NULL == stream) {
1526 return NULL;
1527 }
1528
1529 stream->set_verify(context.should_verify(classpath_index));
1530
1531 ClassLoaderData* loader_data = ClassLoaderData::the_null_class_loader_data();
1532 Handle protection_domain;
1533
1534 InstanceKlass* result = KlassFactory::create_from_stream(stream,
1535 name,
1536 loader_data,
1537 protection_domain,
1538 NULL, // host_klass
1539 NULL, // cp_patches
1540 THREAD);
1541 if (HAS_PENDING_EXCEPTION) {
1542 if (DumpSharedSpaces) {
1543 tty->print_cr("Preload Error: Failed to load %s", class_name);
1544 }
1545 return NULL;
1546 }
1547
1548 if (!add_package(file_name, classpath_index, THREAD)) {
1549 return NULL;
1550 }
1551
1552 return result;
1553 }
1554
1555 #if INCLUDE_CDS
1556 char* ClassLoader::skip_uri_protocol(char* source) {
1557 if (strncmp(source, "file:", 5) == 0) {
1558 // file: protocol path could start with file:/ or file:///
1559 // locate the char after all the forward slashes
1560 int offset = 5;
1561 while (*(source + offset) == '/') {
1562 offset++;
1563 }
1564 source += offset;
1565 // for non-windows platforms, move back one char as the path begins with a '/'
1566 #ifndef _WINDOWS
1567 source -= 1;
1568 #endif
1569 } else if (strncmp(source, "jrt:/", 5) == 0) {
1570 source += 5;
1571 }
1572 return source;
1573 }
1574
1575 // Record the shared classpath index and loader type for classes loaded
1576 // by the builtin loaders at dump time.
1577 void ClassLoader::record_result(InstanceKlass* ik, const ClassFileStream* stream) {
1578 assert(DumpSharedSpaces, "sanity");
1579 assert(stream != NULL, "sanity");
1580
1581 if (ik->is_anonymous()) {
1582 // We do not archive anonymous classes.
1583 return;
1584 }
1585
1586 oop loader = ik->class_loader();
1587 char* src = (char*)stream->source();
1588 if (src == NULL) {
1589 if (loader == NULL) {
1590 // JFR classes
1591 ik->set_shared_classpath_index(0);
1592 ik->set_class_loader_type(ClassLoader::BOOT_LOADER);
1593 }
1594 return;
1595 }
1596
1597 assert(has_jrt_entry(), "CDS dumping does not support exploded JDK build");
1598
1599 ResourceMark rm;
1600 Thread* THREAD = Thread::current();
1601 int classpath_index = -1;
1602 PackageEntry* pkg_entry = ik->package();
1603
1604 if (FileMapInfo::get_number_of_shared_paths() > 0) {
1605 char* canonical_path = NEW_RESOURCE_ARRAY(char, JVM_MAXPATHLEN);
1606
1607 // save the path from the file: protocol or the module name from the jrt: protocol
1608 // if no protocol prefix is found, path is the same as stream->source()
1609 char* path = skip_uri_protocol(src);
1610 for (int i = 0; i < FileMapInfo::get_number_of_shared_paths(); i++) {
1611 SharedClassPathEntry* ent = FileMapInfo::shared_path(i);
1612 if (get_canonical_path(ent->name(), canonical_path, JVM_MAXPATHLEN)) {
1613 // If the path (from the class stream source) is the same as the shared
1614 // class or module path, then we have a match.
1615 if (strcmp(canonical_path, os::native_path((char*)path)) == 0) {
1616 // NULL pkg_entry and pkg_entry in an unnamed module implies the class
1617 // is from the -cp or -Xbootclasspath/a.
1618 if ((pkg_entry == NULL) || (pkg_entry->in_unnamed_module())) {
1619 // Ensure the index is within the -cp range before assigning
1620 // to the classpath_index.
1621 if (SystemDictionary::is_system_class_loader(loader) &&
1622 (i >= ClassLoaderExt::app_class_paths_start_index()) &&
1623 (i < ClassLoaderExt::app_module_paths_start_index())) {
1624 classpath_index = i;
1625 break;
1626 } else {
1627 if ((i >= 1) &&
1628 (i < ClassLoaderExt::app_class_paths_start_index())) {
1629 // The class must be from -Xbootclasspath/a
1630 assert(loader == NULL, "sanity");
1631 classpath_index = i;
1632 break;
1633 }
1634 }
1635 } else {
1636 // A class from a named module from the --module-path. Ensure the index is
1637 // within the --module-path range before assigning to the classpath_index.
1638 if ((pkg_entry != NULL) && !(pkg_entry->in_unnamed_module()) && (i > 0)) {
1639 if (i >= ClassLoaderExt::app_module_paths_start_index() &&
1640 i < FileMapInfo::get_number_of_shared_paths()) {
1641 classpath_index = i;
1642 break;
1643 }
1644 }
1645 }
1646 }
1647 // for index 0 and the stream->source() is the modules image or has the jrt: protocol.
1648 // The class must be from the runtime modules image.
1649 if (i == 0 && (is_modules_image(src) || string_starts_with(src, "jrt:"))) {
1650 classpath_index = i;
1651 break;
1652 }
1653 }
1654 }
1655
1656 // No path entry found for this class. Must be a shared class loaded by the
1657 // user defined classloader.
1658 if (classpath_index < 0) {
1659 assert(ik->shared_classpath_index() < 0, "Sanity");
1660 return;
1661 }
1662 } else {
1663 // The shared path table is set up after module system initialization.
1664 // The path table contains no entry before that. Any classes loaded prior
1665 // to the setup of the shared path table must be from the modules image.
1666 assert(is_modules_image(src), "stream must be from modules image");
1667 assert(FileMapInfo::get_number_of_shared_paths() == 0, "shared path table must not have been setup");
1668 classpath_index = 0;
1669 }
1670
1671 const char* const class_name = ik->name()->as_C_string();
1672 const char* const file_name = file_name_for_class_name(class_name,
1673 ik->name()->utf8_length());
1674 assert(file_name != NULL, "invariant");
1675
1676 ClassLoaderExt::Context context(class_name, file_name, CATCH);
1677 context.record_result(ik->name(), classpath_index, ik, THREAD);
1678 }
1679 #endif // INCLUDE_CDS
1680
1681 // Initialize the class loader's access to methods in libzip. Parse and
1682 // process the boot classpath into a list ClassPathEntry objects. Once
1683 // this list has been created, it must not change order (see class PackageInfo)
1684 // it can be appended to and is by jvmti and the kernel vm.
1685
1686 void ClassLoader::initialize() {
1687 EXCEPTION_MARK;
1688
1689 if (UsePerfData) {
1690 // jvmstat performance counters
1691 NEWPERFTICKCOUNTER(_perf_accumulated_time, SUN_CLS, "time");
1692 NEWPERFTICKCOUNTER(_perf_class_init_time, SUN_CLS, "classInitTime");
1693 NEWPERFTICKCOUNTER(_perf_class_init_selftime, SUN_CLS, "classInitTime.self");
1694 NEWPERFTICKCOUNTER(_perf_class_verify_time, SUN_CLS, "classVerifyTime");
1695 NEWPERFTICKCOUNTER(_perf_class_verify_selftime, SUN_CLS, "classVerifyTime.self");
1696 NEWPERFTICKCOUNTER(_perf_class_link_time, SUN_CLS, "classLinkedTime");
1697 NEWPERFTICKCOUNTER(_perf_class_link_selftime, SUN_CLS, "classLinkedTime.self");
1698 NEWPERFEVENTCOUNTER(_perf_classes_inited, SUN_CLS, "initializedClasses");
1699 NEWPERFEVENTCOUNTER(_perf_classes_linked, SUN_CLS, "linkedClasses");
1700 NEWPERFEVENTCOUNTER(_perf_classes_verified, SUN_CLS, "verifiedClasses");
1701
1702 NEWPERFTICKCOUNTER(_perf_class_parse_time, SUN_CLS, "parseClassTime");
1703 NEWPERFTICKCOUNTER(_perf_class_parse_selftime, SUN_CLS, "parseClassTime.self");
1704 NEWPERFTICKCOUNTER(_perf_sys_class_lookup_time, SUN_CLS, "lookupSysClassTime");
1705 NEWPERFTICKCOUNTER(_perf_shared_classload_time, SUN_CLS, "sharedClassLoadTime");
1706 NEWPERFTICKCOUNTER(_perf_sys_classload_time, SUN_CLS, "sysClassLoadTime");
1707 NEWPERFTICKCOUNTER(_perf_app_classload_time, SUN_CLS, "appClassLoadTime");
1708 NEWPERFTICKCOUNTER(_perf_app_classload_selftime, SUN_CLS, "appClassLoadTime.self");
1709 NEWPERFEVENTCOUNTER(_perf_app_classload_count, SUN_CLS, "appClassLoadCount");
1710 NEWPERFTICKCOUNTER(_perf_define_appclasses, SUN_CLS, "defineAppClasses");
1711 NEWPERFTICKCOUNTER(_perf_define_appclass_time, SUN_CLS, "defineAppClassTime");
1712 NEWPERFTICKCOUNTER(_perf_define_appclass_selftime, SUN_CLS, "defineAppClassTime.self");
1713 NEWPERFBYTECOUNTER(_perf_app_classfile_bytes_read, SUN_CLS, "appClassBytes");
1714 NEWPERFBYTECOUNTER(_perf_sys_classfile_bytes_read, SUN_CLS, "sysClassBytes");
1715
1716
1717 // The following performance counters are added for measuring the impact
1718 // of the bug fix of 6365597. They are mainly focused on finding out
1719 // the behavior of system & user-defined classloader lock, whether
1720 // ClassLoader.loadClass/findClass is being called synchronized or not.
1721 NEWPERFEVENTCOUNTER(_sync_systemLoaderLockContentionRate, SUN_CLS,
1722 "systemLoaderLockContentionRate");
1723 NEWPERFEVENTCOUNTER(_sync_nonSystemLoaderLockContentionRate, SUN_CLS,
1724 "nonSystemLoaderLockContentionRate");
1725 NEWPERFEVENTCOUNTER(_sync_JVMFindLoadedClassLockFreeCounter, SUN_CLS,
1726 "jvmFindLoadedClassNoLockCalls");
1727 NEWPERFEVENTCOUNTER(_sync_JVMDefineClassLockFreeCounter, SUN_CLS,
1728 "jvmDefineClassNoLockCalls");
1729
1730 NEWPERFEVENTCOUNTER(_sync_JNIDefineClassLockFreeCounter, SUN_CLS,
1731 "jniDefineClassNoLockCalls");
1732
1733 NEWPERFEVENTCOUNTER(_unsafe_defineClassCallCounter, SUN_CLS,
1734 "unsafeDefineClassCalls");
1735
1736 NEWPERFEVENTCOUNTER(_load_instance_class_failCounter, SUN_CLS,
1737 "loadInstanceClassFailRate");
1738 }
1739
1740 // lookup zip library entry points
1741 load_zip_library();
1742 // lookup jimage library entry points
1743 load_jimage_library();
1744 #if INCLUDE_CDS
1745 // initialize search path
1746 if (DumpSharedSpaces) {
1747 _shared_paths_misc_info = SharedClassUtil::allocate_shared_paths_misc_info();
1748 }
1749 #endif
1750 setup_bootstrap_search_path();
1751 }
1752
1753 #if INCLUDE_CDS
1754 void ClassLoader::initialize_shared_path() {
1755 if (DumpSharedSpaces) {
1756 ClassLoaderExt::setup_search_paths();
1757 _shared_paths_misc_info->write_jint(0); // see comments in SharedPathsMiscInfo::check()
1758 }
1759 }
1760
1761 void ClassLoader::initialize_module_path() {
1762 if (DumpSharedSpaces) {
1763 ClassLoaderExt::setup_module_paths();
1764 FileMapInfo::allocate_shared_path_table();
1765 }
1766 }
1767 #endif
1768
1769 jlong ClassLoader::classloader_time_ms() {
1770 return UsePerfData ?
1771 Management::ticks_to_ms(_perf_accumulated_time->get_value()) : -1;
1772 }
1773
1774 jlong ClassLoader::class_init_count() {
1775 return UsePerfData ? _perf_classes_inited->get_value() : -1;
1776 }
1777
1778 jlong ClassLoader::class_init_time_ms() {
1779 return UsePerfData ?
1780 Management::ticks_to_ms(_perf_class_init_time->get_value()) : -1;
1781 }
1782
1783 jlong ClassLoader::class_verify_time_ms() {
1784 return UsePerfData ?
1785 Management::ticks_to_ms(_perf_class_verify_time->get_value()) : -1;
1786 }
1787
1788 jlong ClassLoader::class_link_count() {
1789 return UsePerfData ? _perf_classes_linked->get_value() : -1;
1790 }
1791
1792 jlong ClassLoader::class_link_time_ms() {
1793 return UsePerfData ?
1794 Management::ticks_to_ms(_perf_class_link_time->get_value()) : -1;
1795 }
1796
1797 int ClassLoader::compute_Object_vtable() {
1798 // hardwired for JDK1.2 -- would need to duplicate class file parsing
1799 // code to determine actual value from file
1800 // Would be value '11' if finals were in vtable
1801 int JDK_1_2_Object_vtable_size = 5;
1802 return JDK_1_2_Object_vtable_size * vtableEntry::size();
1803 }
1804
1805
1806 void classLoader_init1() {
1807 ClassLoader::initialize();
1808 }
1809
1810 // Complete the ClassPathEntry setup for the boot loader
1811 void ClassLoader::classLoader_init2(TRAPS) {
1812 // Setup the list of module/path pairs for --patch-module processing
1813 // This must be done after the SymbolTable is created in order
1814 // to use fast_compare on module names instead of a string compare.
1815 if (Arguments::get_patch_mod_prefix() != NULL) {
1816 setup_patch_mod_entries();
1817 }
1818
1819 // Create the ModuleEntry for java.base (must occur after setup_patch_mod_entries
1820 // to successfully determine if java.base has been patched)
1821 create_javabase();
1822
1823 // Setup the initial java.base/path pair for the exploded build entries.
1824 // As more modules are defined during module system initialization, more
1825 // entries will be added to the exploded build array.
1826 if (!has_jrt_entry()) {
1827 assert(!DumpSharedSpaces, "DumpSharedSpaces not supported with exploded module builds");
1828 assert(!UseSharedSpaces, "UsedSharedSpaces not supported with exploded module builds");
1829 // Set up the boot loader's _exploded_entries list. Note that this gets
1830 // done before loading any classes, by the same thread that will
1831 // subsequently do the first class load. So, no lock is needed for this.
1832 assert(_exploded_entries == NULL, "Should only get initialized once");
1833 _exploded_entries = new (ResourceObj::C_HEAP, mtModule)
1834 GrowableArray<ModuleClassPathList*>(EXPLODED_ENTRY_SIZE, true);
1835 add_to_exploded_build_list(vmSymbols::java_base(), CHECK);
1836 }
1837 }
1838
1839
1840 bool ClassLoader::get_canonical_path(const char* orig, char* out, int len) {
1841 assert(orig != NULL && out != NULL && len > 0, "bad arguments");
1842 if (CanonicalizeEntry != NULL) {
1843 JavaThread* THREAD = JavaThread::current();
1844 JNIEnv* env = THREAD->jni_environment();
1845 ResourceMark rm(THREAD);
1846
1847 // os::native_path writes into orig_copy
1848 char* orig_copy = NEW_RESOURCE_ARRAY_IN_THREAD(THREAD, char, strlen(orig)+1);
1849 strcpy(orig_copy, orig);
1850 if ((CanonicalizeEntry)(env, os::native_path(orig_copy), out, len) < 0) {
1851 return false;
1852 }
1853 } else {
1854 // On JDK 1.2.2 the Canonicalize does not exist, so just do nothing
1855 strncpy(out, orig, len);
1856 out[len - 1] = '\0';
1857 }
1858 return true;
1859 }
1860
1861 void ClassLoader::create_javabase() {
1862 Thread* THREAD = Thread::current();
1863
1864 // Create java.base's module entry for the boot
1865 // class loader prior to loading j.l.Ojbect.
1866 ClassLoaderData* null_cld = ClassLoaderData::the_null_class_loader_data();
1867
1868 // Get module entry table
1869 ModuleEntryTable* null_cld_modules = null_cld->modules();
1870 if (null_cld_modules == NULL) {
1871 vm_exit_during_initialization("No ModuleEntryTable for the boot class loader");
1872 }
1873
1874 {
1875 MutexLocker ml(Module_lock, THREAD);
1876 ModuleEntry* jb_module = null_cld_modules->locked_create_entry_or_null(Handle(),
1877 false, vmSymbols::java_base(), NULL, NULL, null_cld);
1878 if (jb_module == NULL) {
1879 vm_exit_during_initialization("Unable to create ModuleEntry for " JAVA_BASE_NAME);
1880 }
1881 ModuleEntryTable::set_javabase_moduleEntry(jb_module);
1882 }
1883 }
1884
1885 #ifndef PRODUCT
1886
1887 // CompileTheWorld
1888 //
1889 // Iterates over all class path entries and forces compilation of all methods
1890 // in all classes found. Currently, only zip/jar archives are searched.
1891 //
1892 // The classes are loaded by the Java level bootstrap class loader, and the
1893 // initializer is called. If DelayCompilationDuringStartup is true (default),
1894 // the interpreter will run the initialization code. Note that forcing
1895 // initialization in this way could potentially lead to initialization order
1896 // problems, in which case we could just force the initialization bit to be set.
1897
1898
1899 // We need to iterate over the contents of a zip/jar file, so we replicate the
1900 // jzcell and jzfile definitions from zip_util.h but rename jzfile to real_jzfile,
1901 // since jzfile already has a void* definition.
1902 //
1903 // Note that this is only used in debug mode.
1904 //
1905 // HotSpot integration note:
1906 // Matches zip_util.h 1.14 99/06/01 from jdk1.3 beta H build
1907
1908
1909 // JDK 1.3 version
1910 typedef struct real_jzentry { /* Zip file entry */
1911 char *name; /* entry name */
1912 jint time; /* modification time */
1913 jint size; /* size of uncompressed data */
1914 jint csize; /* size of compressed data (zero if uncompressed) */
1915 jint crc; /* crc of uncompressed data */
1916 char *comment; /* optional zip file comment */
1917 jbyte *extra; /* optional extra data */
1918 jint pos; /* position of LOC header (if negative) or data */
1919 } real_jzentry;
1920
1921 typedef struct real_jzfile { /* Zip file */
1922 char *name; /* zip file name */
1923 jint refs; /* number of active references */
1924 jint fd; /* open file descriptor */
1925 void *lock; /* read lock */
1926 char *comment; /* zip file comment */
1927 char *msg; /* zip error message */
1928 void *entries; /* array of hash cells */
1929 jint total; /* total number of entries */
1930 unsigned short *table; /* Hash chain heads: indexes into entries */
1931 jint tablelen; /* number of hash eads */
1932 real_jzfile *next; /* next zip file in search list */
1933 jzentry *cache; /* we cache the most recently freed jzentry */
1934 /* Information on metadata names in META-INF directory */
1935 char **metanames; /* array of meta names (may have null names) */
1936 jint metacount; /* number of slots in metanames array */
1937 /* If there are any per-entry comments, they are in the comments array */
1938 char **comments;
1939 } real_jzfile;
1940
1941 void ClassPathDirEntry::compile_the_world(Handle loader, TRAPS) {
1942 // For now we only compile all methods in all classes in zip/jar files
1943 tty->print_cr("CompileTheWorld : Skipped classes in %s", _dir);
1944 tty->cr();
1945 }
1946
1947 void ClassPathZipEntry::compile_the_world(Handle loader, TRAPS) {
1948 real_jzfile* zip = (real_jzfile*) _zip;
1949 tty->print_cr("CompileTheWorld : Compiling all classes in %s", zip->name);
1950 tty->cr();
1951 // Iterate over all entries in zip file
1952 for (int n = 0; ; n++) {
1953 real_jzentry * ze = (real_jzentry *)((*GetNextEntry)(_zip, n));
1954 if (ze == NULL) break;
1955 ClassLoader::compile_the_world_in(ze->name, loader, CHECK);
1956 }
1957 if (HAS_PENDING_EXCEPTION) {
1958 if (PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())) {
1959 CLEAR_PENDING_EXCEPTION;
1960 tty->print_cr("\nCompileTheWorld : Ran out of memory\n");
1961 tty->print_cr("Increase class metadata storage if a limit was set");
1962 } else {
1963 tty->print_cr("\nCompileTheWorld : Unexpected exception occurred\n");
1964 }
1965 }
1966 }
1967
1968 void ClassLoader::compile_the_world() {
1969 EXCEPTION_MARK;
1970 HandleMark hm(THREAD);
1971 ResourceMark rm(THREAD);
1972
1973 assert(has_jrt_entry(), "Compile The World not supported with exploded module build");
1974
1975 // Find bootstrap loader
1976 Handle system_class_loader (THREAD, SystemDictionary::java_system_loader());
1977 jlong start = os::javaTimeMillis();
1978
1979 // Compile the world for the modular java runtime image
1980 _jrt_entry->compile_the_world(system_class_loader, CATCH);
1981
1982 // Iterate over all bootstrap class path appended entries
1983 ClassPathEntry* e = _first_append_entry;
1984 while (e != NULL) {
1985 assert(!e->is_modules_image(), "A modular java runtime image is present on the list of appended entries");
1986 e->compile_the_world(system_class_loader, CATCH);
1987 e = e->next();
1988 }
1989 jlong end = os::javaTimeMillis();
1990 tty->print_cr("CompileTheWorld : Done (%d classes, %d methods, " JLONG_FORMAT " ms)",
1991 _compile_the_world_class_counter, _compile_the_world_method_counter, (end - start));
1992 {
1993 // Print statistics as if before normal exit:
1994 extern void print_statistics();
1995 print_statistics();
1996 }
1997 vm_exit(0);
1998 }
1999
2000 int ClassLoader::_compile_the_world_class_counter = 0;
2001 int ClassLoader::_compile_the_world_method_counter = 0;
2002 static int _codecache_sweep_counter = 0;
2003
2004 // Filter out all exceptions except OOMs
2005 static void clear_pending_exception_if_not_oom(TRAPS) {
2006 if (HAS_PENDING_EXCEPTION &&
2007 !PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())) {
2008 CLEAR_PENDING_EXCEPTION;
2009 }
2010 // The CHECK at the caller will propagate the exception out
2011 }
2012
2013 /**
2014 * Returns if the given method should be compiled when doing compile-the-world.
2015 *
2016 * TODO: This should be a private method in a CompileTheWorld class.
2017 */
2018 static bool can_be_compiled(const methodHandle& m, int comp_level) {
2019 assert(CompileTheWorld, "must be");
2020
2021 // It's not valid to compile a native wrapper for MethodHandle methods
2022 // that take a MemberName appendix since the bytecode signature is not
2023 // correct.
2024 vmIntrinsics::ID iid = m->intrinsic_id();
2025 if (MethodHandles::is_signature_polymorphic(iid) && MethodHandles::has_member_arg(iid)) {
2026 return false;
2027 }
2028
2029 return CompilationPolicy::can_be_compiled(m, comp_level);
2030 }
2031
2032 void ClassLoader::compile_the_world_in(char* name, Handle loader, TRAPS) {
2033 if (string_ends_with(name, ".class")) {
2034 // We have a .class file
2035 int len = (int)strlen(name);
2036 char buffer[2048];
2037 strncpy(buffer, name, len - 6);
2038 buffer[len-6] = 0;
2039 // If the file has a period after removing .class, it's not really a
2040 // valid class file. The class loader will check everything else.
2041 if (strchr(buffer, '.') == NULL) {
2042 _compile_the_world_class_counter++;
2043 if (_compile_the_world_class_counter > CompileTheWorldStopAt) return;
2044
2045 // Construct name without extension
2046 TempNewSymbol sym = SymbolTable::new_symbol(buffer, CHECK);
2047 // Use loader to load and initialize class
2048 Klass* k = SystemDictionary::resolve_or_null(sym, loader, Handle(), THREAD);
2049 if (k != NULL && !HAS_PENDING_EXCEPTION) {
2050 k->initialize(THREAD);
2051 }
2052 bool exception_occurred = HAS_PENDING_EXCEPTION;
2053 clear_pending_exception_if_not_oom(CHECK);
2054 if (CompileTheWorldPreloadClasses && k != NULL) {
2055 InstanceKlass* ik = InstanceKlass::cast(k);
2056 ConstantPool::preload_and_initialize_all_classes(ik->constants(), THREAD);
2057 if (HAS_PENDING_EXCEPTION) {
2058 // If something went wrong in preloading we just ignore it
2059 clear_pending_exception_if_not_oom(CHECK);
2060 tty->print_cr("Preloading failed for (%d) %s", _compile_the_world_class_counter, buffer);
2061 }
2062 }
2063
2064 if (_compile_the_world_class_counter >= CompileTheWorldStartAt) {
2065 if (k == NULL || exception_occurred) {
2066 // If something went wrong (e.g. ExceptionInInitializerError) we skip this class
2067 tty->print_cr("CompileTheWorld (%d) : Skipping %s", _compile_the_world_class_counter, buffer);
2068 } else {
2069 tty->print_cr("CompileTheWorld (%d) : %s", _compile_the_world_class_counter, buffer);
2070 // Preload all classes to get around uncommon traps
2071 // Iterate over all methods in class
2072 int comp_level = CompilationPolicy::policy()->initial_compile_level();
2073 InstanceKlass* ik = InstanceKlass::cast(k);
2074 for (int n = 0; n < ik->methods()->length(); n++) {
2075 methodHandle m (THREAD, ik->methods()->at(n));
2076 if (can_be_compiled(m, comp_level)) {
2077 if (++_codecache_sweep_counter == CompileTheWorldSafepointInterval) {
2078 // Give sweeper a chance to keep up with CTW
2079 VM_CTWThreshold op;
2080 VMThread::execute(&op);
2081 _codecache_sweep_counter = 0;
2082 }
2083 // Force compilation
2084 CompileBroker::compile_method(m, InvocationEntryBci, comp_level,
2085 methodHandle(), 0, CompileTask::Reason_CTW, THREAD);
2086 if (HAS_PENDING_EXCEPTION) {
2087 clear_pending_exception_if_not_oom(CHECK);
2088 tty->print_cr("CompileTheWorld (%d) : Skipping method: %s", _compile_the_world_class_counter, m->name_and_sig_as_C_string());
2089 } else {
2090 _compile_the_world_method_counter++;
2091 }
2092 if (TieredCompilation && TieredStopAtLevel >= CompLevel_full_optimization) {
2093 // Clobber the first compile and force second tier compilation
2094 CompiledMethod* nm = m->code();
2095 if (nm != NULL && !m->is_method_handle_intrinsic()) {
2096 // Throw out the code so that the code cache doesn't fill up
2097 nm->make_not_entrant();
2098 }
2099 CompileBroker::compile_method(m, InvocationEntryBci, CompLevel_full_optimization,
2100 methodHandle(), 0, CompileTask::Reason_CTW, THREAD);
2101 if (HAS_PENDING_EXCEPTION) {
2102 clear_pending_exception_if_not_oom(CHECK);
2103 tty->print_cr("CompileTheWorld (%d) : Skipping method: %s", _compile_the_world_class_counter, m->name_and_sig_as_C_string());
2104 } else {
2105 _compile_the_world_method_counter++;
2106 }
2107 }
2108 } else {
2109 tty->print_cr("CompileTheWorld (%d) : Skipping method: %s", _compile_the_world_class_counter, m->name_and_sig_as_C_string());
2110 }
2111
2112 CompiledMethod* nm = m->code();
2113 if (nm != NULL && !m->is_method_handle_intrinsic()) {
2114 // Throw out the code so that the code cache doesn't fill up
2115 nm->make_not_entrant();
2116 }
2117 }
2118 }
2119 }
2120 }
2121 }
2122 }
2123
2124 #endif //PRODUCT
2125
2126 // Please keep following two functions at end of this file. With them placed at top or in middle of the file,
2127 // they could get inlined by agressive compiler, an unknown trick, see bug 6966589.
2128 void PerfClassTraceTime::initialize() {
2129 if (!UsePerfData) return;
2130
2131 if (_eventp != NULL) {
2132 // increment the event counter
2133 _eventp->inc();
2134 }
2135
2136 // stop the current active thread-local timer to measure inclusive time
2137 _prev_active_event = -1;
2138 for (int i=0; i < EVENT_TYPE_COUNT; i++) {
2139 if (_timers[i].is_active()) {
2140 assert(_prev_active_event == -1, "should have only one active timer");
2141 _prev_active_event = i;
2142 _timers[i].stop();
2143 }
2144 }
2145
2146 if (_recursion_counters == NULL || (_recursion_counters[_event_type])++ == 0) {
2147 // start the inclusive timer if not recursively called
2148 _t.start();
2149 }
2150
2151 // start thread-local timer of the given event type
2152 if (!_timers[_event_type].is_active()) {
2153 _timers[_event_type].start();
2154 }
2155 }
2156
2157 PerfClassTraceTime::~PerfClassTraceTime() {
2158 if (!UsePerfData) return;
2159
2160 // stop the thread-local timer as the event completes
2161 // and resume the thread-local timer of the event next on the stack
2162 _timers[_event_type].stop();
2163 jlong selftime = _timers[_event_type].ticks();
2164
2165 if (_prev_active_event >= 0) {
2166 _timers[_prev_active_event].start();
2167 }
2168
2169 if (_recursion_counters != NULL && --(_recursion_counters[_event_type]) > 0) return;
2170
2171 // increment the counters only on the leaf call
2172 _t.stop();
2173 _timep->inc(_t.ticks());
2174 if (_selftimep != NULL) {
2175 _selftimep->inc(selftime);
2176 }
2177 // add all class loading related event selftime to the accumulated time counter
2178 ClassLoader::perf_accumulated_time()->inc(selftime);
2179
2180 // reset the timer
2181 _timers[_event_type].reset();
2182 }