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