Mercurial > hg > truffle
annotate src/share/vm/classfile/classLoader.cpp @ 973:ad6585fd4087
6830542: Performance: JVM_DefineClass already verified.
Reviewed-by: kamg, phh
| author | acorn |
|---|---|
| date | Fri, 04 Sep 2009 12:53:02 -0400 |
| parents | 66b0f834a440 |
| children | 4ce7240d622c |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 844 | 2 * Copyright 1997-2009 Sun Microsystems, Inc. All Rights Reserved. |
| 0 | 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 21 * have any questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 #include "incls/_precompiled.incl" | |
| 26 #include "incls/_classLoader.cpp.incl" | |
| 27 | |
| 28 | |
| 29 // Entry points in zip.dll for loading zip/jar file entries | |
| 30 | |
| 31 typedef void * * (JNICALL *ZipOpen_t)(const char *name, char **pmsg); | |
| 32 typedef void (JNICALL *ZipClose_t)(jzfile *zip); | |
| 33 typedef jzentry* (JNICALL *FindEntry_t)(jzfile *zip, const char *name, jint *sizeP, jint *nameLen); | |
| 34 typedef jboolean (JNICALL *ReadEntry_t)(jzfile *zip, jzentry *entry, unsigned char *buf, char *namebuf); | |
| 35 typedef jboolean (JNICALL *ReadMappedEntry_t)(jzfile *zip, jzentry *entry, unsigned char **buf, char *namebuf); | |
| 36 typedef jzentry* (JNICALL *GetNextEntry_t)(jzfile *zip, jint n); | |
| 37 | |
| 38 static ZipOpen_t ZipOpen = NULL; | |
| 39 static ZipClose_t ZipClose = NULL; | |
| 40 static FindEntry_t FindEntry = NULL; | |
| 41 static ReadEntry_t ReadEntry = NULL; | |
| 42 static ReadMappedEntry_t ReadMappedEntry = NULL; | |
| 43 static GetNextEntry_t GetNextEntry = NULL; | |
| 44 static canonicalize_fn_t CanonicalizeEntry = NULL; | |
| 45 | |
| 46 // Globals | |
| 47 | |
| 48 PerfCounter* ClassLoader::_perf_accumulated_time = NULL; | |
| 49 PerfCounter* ClassLoader::_perf_classes_inited = NULL; | |
| 50 PerfCounter* ClassLoader::_perf_class_init_time = NULL; | |
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51 PerfCounter* ClassLoader::_perf_class_init_selftime = NULL; |
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52 PerfCounter* ClassLoader::_perf_classes_verified = NULL; |
| 0 | 53 PerfCounter* ClassLoader::_perf_class_verify_time = NULL; |
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54 PerfCounter* ClassLoader::_perf_class_verify_selftime = NULL; |
| 0 | 55 PerfCounter* ClassLoader::_perf_classes_linked = NULL; |
| 56 PerfCounter* ClassLoader::_perf_class_link_time = NULL; | |
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57 PerfCounter* ClassLoader::_perf_class_link_selftime = NULL; |
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58 PerfCounter* ClassLoader::_perf_class_parse_time = NULL; |
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59 PerfCounter* ClassLoader::_perf_class_parse_selftime = NULL; |
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60 PerfCounter* ClassLoader::_perf_sys_class_lookup_time = NULL; |
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61 PerfCounter* ClassLoader::_perf_shared_classload_time = NULL; |
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62 PerfCounter* ClassLoader::_perf_sys_classload_time = NULL; |
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63 PerfCounter* ClassLoader::_perf_app_classload_time = NULL; |
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64 PerfCounter* ClassLoader::_perf_app_classload_selftime = NULL; |
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65 PerfCounter* ClassLoader::_perf_app_classload_count = NULL; |
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66 PerfCounter* ClassLoader::_perf_define_appclasses = NULL; |
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67 PerfCounter* ClassLoader::_perf_define_appclass_time = NULL; |
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68 PerfCounter* ClassLoader::_perf_define_appclass_selftime = NULL; |
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69 PerfCounter* ClassLoader::_perf_app_classfile_bytes_read = NULL; |
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70 PerfCounter* ClassLoader::_perf_sys_classfile_bytes_read = NULL; |
| 0 | 71 PerfCounter* ClassLoader::_sync_systemLoaderLockContentionRate = NULL; |
| 72 PerfCounter* ClassLoader::_sync_nonSystemLoaderLockContentionRate = NULL; | |
| 73 PerfCounter* ClassLoader::_sync_JVMFindLoadedClassLockFreeCounter = NULL; | |
| 74 PerfCounter* ClassLoader::_sync_JVMDefineClassLockFreeCounter = NULL; | |
| 75 PerfCounter* ClassLoader::_sync_JNIDefineClassLockFreeCounter = NULL; | |
| 76 PerfCounter* ClassLoader::_unsafe_defineClassCallCounter = NULL; | |
| 77 PerfCounter* ClassLoader::_isUnsyncloadClass = NULL; | |
| 78 PerfCounter* ClassLoader::_load_instance_class_failCounter = NULL; | |
| 79 | |
| 80 ClassPathEntry* ClassLoader::_first_entry = NULL; | |
| 81 ClassPathEntry* ClassLoader::_last_entry = NULL; | |
| 82 PackageHashtable* ClassLoader::_package_hash_table = NULL; | |
| 83 | |
| 84 // helper routines | |
| 85 bool string_starts_with(const char* str, const char* str_to_find) { | |
| 86 size_t str_len = strlen(str); | |
| 87 size_t str_to_find_len = strlen(str_to_find); | |
| 88 if (str_to_find_len > str_len) { | |
| 89 return false; | |
| 90 } | |
| 91 return (strncmp(str, str_to_find, str_to_find_len) == 0); | |
| 92 } | |
| 93 | |
| 94 bool string_ends_with(const char* str, const char* str_to_find) { | |
| 95 size_t str_len = strlen(str); | |
| 96 size_t str_to_find_len = strlen(str_to_find); | |
| 97 if (str_to_find_len > str_len) { | |
| 98 return false; | |
| 99 } | |
| 100 return (strncmp(str + (str_len - str_to_find_len), str_to_find, str_to_find_len) == 0); | |
| 101 } | |
| 102 | |
| 103 | |
| 104 MetaIndex::MetaIndex(char** meta_package_names, int num_meta_package_names) { | |
| 105 if (num_meta_package_names == 0) { | |
| 106 _meta_package_names = NULL; | |
| 107 _num_meta_package_names = 0; | |
| 108 } else { | |
| 109 _meta_package_names = NEW_C_HEAP_ARRAY(char*, num_meta_package_names); | |
| 110 _num_meta_package_names = num_meta_package_names; | |
| 111 memcpy(_meta_package_names, meta_package_names, num_meta_package_names * sizeof(char*)); | |
| 112 } | |
| 113 } | |
| 114 | |
| 115 | |
| 116 MetaIndex::~MetaIndex() { | |
| 117 FREE_C_HEAP_ARRAY(char*, _meta_package_names); | |
| 118 } | |
| 119 | |
| 120 | |
| 121 bool MetaIndex::may_contain(const char* class_name) { | |
| 122 if ( _num_meta_package_names == 0) { | |
| 123 return false; | |
| 124 } | |
| 125 size_t class_name_len = strlen(class_name); | |
| 126 for (int i = 0; i < _num_meta_package_names; i++) { | |
| 127 char* pkg = _meta_package_names[i]; | |
| 128 size_t pkg_len = strlen(pkg); | |
| 129 size_t min_len = MIN2(class_name_len, pkg_len); | |
| 130 if (!strncmp(class_name, pkg, min_len)) { | |
| 131 return true; | |
| 132 } | |
| 133 } | |
| 134 return false; | |
| 135 } | |
| 136 | |
| 137 | |
| 138 ClassPathEntry::ClassPathEntry() { | |
| 139 set_next(NULL); | |
| 140 } | |
| 141 | |
| 142 | |
| 143 bool ClassPathEntry::is_lazy() { | |
| 144 return false; | |
| 145 } | |
| 146 | |
| 147 ClassPathDirEntry::ClassPathDirEntry(char* dir) : ClassPathEntry() { | |
| 148 _dir = NEW_C_HEAP_ARRAY(char, strlen(dir)+1); | |
| 149 strcpy(_dir, dir); | |
| 150 } | |
| 151 | |
| 152 | |
| 153 ClassFileStream* ClassPathDirEntry::open_stream(const char* name) { | |
| 154 // construct full path name | |
| 155 char path[JVM_MAXPATHLEN]; | |
| 156 if (jio_snprintf(path, sizeof(path), "%s%s%s", _dir, os::file_separator(), name) == -1) { | |
| 157 return NULL; | |
| 158 } | |
| 159 // check if file exists | |
| 160 struct stat st; | |
| 161 if (os::stat(path, &st) == 0) { | |
| 162 // found file, open it | |
| 163 int file_handle = hpi::open(path, 0, 0); | |
| 164 if (file_handle != -1) { | |
| 165 // read contents into resource array | |
| 166 u1* buffer = NEW_RESOURCE_ARRAY(u1, st.st_size); | |
| 167 size_t num_read = os::read(file_handle, (char*) buffer, st.st_size); | |
| 168 // close file | |
| 169 hpi::close(file_handle); | |
| 170 // construct ClassFileStream | |
| 171 if (num_read == (size_t)st.st_size) { | |
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172 if (UsePerfData) { |
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173 ClassLoader::perf_sys_classfile_bytes_read()->inc(num_read); |
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174 } |
| 0 | 175 return new ClassFileStream(buffer, st.st_size, _dir); // Resource allocated |
| 176 } | |
| 177 } | |
| 178 } | |
| 179 return NULL; | |
| 180 } | |
| 181 | |
| 182 | |
| 183 ClassPathZipEntry::ClassPathZipEntry(jzfile* zip, const char* zip_name) : ClassPathEntry() { | |
| 184 _zip = zip; | |
| 185 _zip_name = NEW_C_HEAP_ARRAY(char, strlen(zip_name)+1); | |
| 186 strcpy(_zip_name, zip_name); | |
| 187 } | |
| 188 | |
| 189 ClassPathZipEntry::~ClassPathZipEntry() { | |
| 190 if (ZipClose != NULL) { | |
| 191 (*ZipClose)(_zip); | |
| 192 } | |
| 193 FREE_C_HEAP_ARRAY(char, _zip_name); | |
| 194 } | |
| 195 | |
| 196 ClassFileStream* ClassPathZipEntry::open_stream(const char* name) { | |
| 197 // enable call to C land | |
| 198 JavaThread* thread = JavaThread::current(); | |
| 199 ThreadToNativeFromVM ttn(thread); | |
| 200 // check whether zip archive contains name | |
| 201 jint filesize, name_len; | |
| 202 jzentry* entry = (*FindEntry)(_zip, name, &filesize, &name_len); | |
| 203 if (entry == NULL) return NULL; | |
| 204 u1* buffer; | |
| 205 char name_buf[128]; | |
| 206 char* filename; | |
| 207 if (name_len < 128) { | |
| 208 filename = name_buf; | |
| 209 } else { | |
| 210 filename = NEW_RESOURCE_ARRAY(char, name_len + 1); | |
| 211 } | |
| 212 | |
| 213 // file found, get pointer to class in mmaped jar file. | |
| 214 if (ReadMappedEntry == NULL || | |
| 215 !(*ReadMappedEntry)(_zip, entry, &buffer, filename)) { | |
| 216 // mmaped access not available, perhaps due to compression, | |
| 217 // read contents into resource array | |
| 218 buffer = NEW_RESOURCE_ARRAY(u1, filesize); | |
| 219 if (!(*ReadEntry)(_zip, entry, buffer, filename)) return NULL; | |
| 220 } | |
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221 if (UsePerfData) { |
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222 ClassLoader::perf_sys_classfile_bytes_read()->inc(filesize); |
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223 } |
| 0 | 224 // return result |
| 225 return new ClassFileStream(buffer, filesize, _zip_name); // Resource allocated | |
| 226 } | |
| 227 | |
| 228 // invoke function for each entry in the zip file | |
| 229 void ClassPathZipEntry::contents_do(void f(const char* name, void* context), void* context) { | |
| 230 JavaThread* thread = JavaThread::current(); | |
| 231 HandleMark handle_mark(thread); | |
| 232 ThreadToNativeFromVM ttn(thread); | |
| 233 for (int n = 0; ; n++) { | |
| 234 jzentry * ze = ((*GetNextEntry)(_zip, n)); | |
| 235 if (ze == NULL) break; | |
| 236 (*f)(ze->name, context); | |
| 237 } | |
| 238 } | |
| 239 | |
| 240 LazyClassPathEntry::LazyClassPathEntry(char* path, struct stat st) : ClassPathEntry() { | |
| 241 _path = strdup(path); | |
| 242 _st = st; | |
| 243 _meta_index = NULL; | |
| 244 _resolved_entry = NULL; | |
| 245 } | |
| 246 | |
| 247 bool LazyClassPathEntry::is_jar_file() { | |
| 248 return ((_st.st_mode & S_IFREG) == S_IFREG); | |
| 249 } | |
| 250 | |
| 251 ClassPathEntry* LazyClassPathEntry::resolve_entry() { | |
| 252 if (_resolved_entry != NULL) { | |
| 253 return (ClassPathEntry*) _resolved_entry; | |
| 254 } | |
| 255 ClassPathEntry* new_entry = NULL; | |
| 256 ClassLoader::create_class_path_entry(_path, _st, &new_entry, false); | |
| 257 assert(new_entry != NULL, "earlier code should have caught this"); | |
| 258 { | |
| 259 ThreadCritical tc; | |
| 260 if (_resolved_entry == NULL) { | |
| 261 _resolved_entry = new_entry; | |
| 262 return new_entry; | |
| 263 } | |
| 264 } | |
| 265 assert(_resolved_entry != NULL, "bug in MT-safe resolution logic"); | |
| 266 delete new_entry; | |
| 267 return (ClassPathEntry*) _resolved_entry; | |
| 268 } | |
| 269 | |
| 270 ClassFileStream* LazyClassPathEntry::open_stream(const char* name) { | |
| 271 if (_meta_index != NULL && | |
| 272 !_meta_index->may_contain(name)) { | |
| 273 return NULL; | |
| 274 } | |
| 275 return resolve_entry()->open_stream(name); | |
| 276 } | |
| 277 | |
| 278 bool LazyClassPathEntry::is_lazy() { | |
| 279 return true; | |
| 280 } | |
| 281 | |
| 282 static void print_meta_index(LazyClassPathEntry* entry, | |
| 283 GrowableArray<char*>& meta_packages) { | |
| 284 tty->print("[Meta index for %s=", entry->name()); | |
| 285 for (int i = 0; i < meta_packages.length(); i++) { | |
| 286 if (i > 0) tty->print(" "); | |
| 287 tty->print(meta_packages.at(i)); | |
| 288 } | |
| 289 tty->print_cr("]"); | |
| 290 } | |
| 291 | |
| 292 | |
| 293 void ClassLoader::setup_meta_index() { | |
| 294 // Set up meta index which allows us to open boot jars lazily if | |
| 295 // class data sharing is enabled | |
| 296 const char* known_version = "% VERSION 2"; | |
| 297 char* meta_index_path = Arguments::get_meta_index_path(); | |
| 298 char* meta_index_dir = Arguments::get_meta_index_dir(); | |
| 299 FILE* file = fopen(meta_index_path, "r"); | |
| 300 int line_no = 0; | |
| 301 if (file != NULL) { | |
| 302 ResourceMark rm; | |
| 303 LazyClassPathEntry* cur_entry = NULL; | |
| 304 GrowableArray<char*> boot_class_path_packages(10); | |
| 305 char package_name[256]; | |
| 306 bool skipCurrentJar = false; | |
| 307 while (fgets(package_name, sizeof(package_name), file) != NULL) { | |
| 308 ++line_no; | |
| 309 // Remove trailing newline | |
| 310 package_name[strlen(package_name) - 1] = '\0'; | |
| 311 switch(package_name[0]) { | |
| 312 case '%': | |
| 313 { | |
| 314 if ((line_no == 1) && (strcmp(package_name, known_version) != 0)) { | |
| 315 if (TraceClassLoading && Verbose) { | |
| 316 tty->print("[Unsupported meta index version]"); | |
| 317 } | |
| 318 fclose(file); | |
| 319 return; | |
| 320 } | |
| 321 } | |
| 322 | |
| 323 // These directives indicate jar files which contain only | |
| 324 // classes, only non-classfile resources, or a combination of | |
| 325 // the two. See src/share/classes/sun/misc/MetaIndex.java and | |
| 326 // make/tools/MetaIndex/BuildMetaIndex.java in the J2SE | |
| 327 // workspace. | |
| 328 case '#': | |
| 329 case '!': | |
| 330 case '@': | |
| 331 { | |
| 332 // Hand off current packages to current lazy entry (if any) | |
| 333 if ((cur_entry != NULL) && | |
| 334 (boot_class_path_packages.length() > 0)) { | |
| 335 if (TraceClassLoading && Verbose) { | |
| 336 print_meta_index(cur_entry, boot_class_path_packages); | |
| 337 } | |
| 338 MetaIndex* index = new MetaIndex(boot_class_path_packages.adr_at(0), | |
| 339 boot_class_path_packages.length()); | |
| 340 cur_entry->set_meta_index(index); | |
| 341 } | |
| 342 cur_entry = NULL; | |
| 343 boot_class_path_packages.clear(); | |
| 344 | |
| 345 // Find lazy entry corresponding to this jar file | |
| 346 for (ClassPathEntry* entry = _first_entry; entry != NULL; entry = entry->next()) { | |
| 347 if (entry->is_lazy() && | |
| 348 string_starts_with(entry->name(), meta_index_dir) && | |
| 349 string_ends_with(entry->name(), &package_name[2])) { | |
| 350 cur_entry = (LazyClassPathEntry*) entry; | |
| 351 break; | |
| 352 } | |
| 353 } | |
| 354 | |
| 355 // If the first character is '@', it indicates the following jar | |
| 356 // file is a resource only jar file in which case, we should skip | |
| 357 // reading the subsequent entries since the resource loading is | |
| 358 // totally handled by J2SE side. | |
| 359 if (package_name[0] == '@') { | |
| 360 if (cur_entry != NULL) { | |
| 361 cur_entry->set_meta_index(new MetaIndex(NULL, 0)); | |
| 362 } | |
| 363 cur_entry = NULL; | |
| 364 skipCurrentJar = true; | |
| 365 } else { | |
| 366 skipCurrentJar = false; | |
| 367 } | |
| 368 | |
| 369 break; | |
| 370 } | |
| 371 | |
| 372 default: | |
| 373 { | |
| 374 if (!skipCurrentJar && cur_entry != NULL) { | |
| 375 char* new_name = strdup(package_name); | |
| 376 boot_class_path_packages.append(new_name); | |
| 377 } | |
| 378 } | |
| 379 } | |
| 380 } | |
| 381 // Hand off current packages to current lazy entry (if any) | |
| 382 if ((cur_entry != NULL) && | |
| 383 (boot_class_path_packages.length() > 0)) { | |
| 384 if (TraceClassLoading && Verbose) { | |
| 385 print_meta_index(cur_entry, boot_class_path_packages); | |
| 386 } | |
| 387 MetaIndex* index = new MetaIndex(boot_class_path_packages.adr_at(0), | |
| 388 boot_class_path_packages.length()); | |
| 389 cur_entry->set_meta_index(index); | |
| 390 } | |
| 391 fclose(file); | |
| 392 } | |
| 393 } | |
| 394 | |
| 395 void ClassLoader::setup_bootstrap_search_path() { | |
| 396 assert(_first_entry == NULL, "should not setup bootstrap class search path twice"); | |
| 397 char* sys_class_path = os::strdup(Arguments::get_sysclasspath()); | |
| 398 if (TraceClassLoading && Verbose) { | |
| 399 tty->print_cr("[Bootstrap loader class path=%s]", sys_class_path); | |
| 400 } | |
| 401 | |
| 402 int len = (int)strlen(sys_class_path); | |
| 403 int end = 0; | |
| 404 | |
| 405 // Iterate over class path entries | |
| 406 for (int start = 0; start < len; start = end) { | |
| 407 while (sys_class_path[end] && sys_class_path[end] != os::path_separator()[0]) { | |
| 408 end++; | |
| 409 } | |
| 410 char* path = NEW_C_HEAP_ARRAY(char, end-start+1); | |
| 411 strncpy(path, &sys_class_path[start], end-start); | |
| 412 path[end-start] = '\0'; | |
| 413 update_class_path_entry_list(path, false); | |
| 414 FREE_C_HEAP_ARRAY(char, path); | |
| 415 while (sys_class_path[end] == os::path_separator()[0]) { | |
| 416 end++; | |
| 417 } | |
| 418 } | |
| 419 } | |
| 420 | |
| 421 void ClassLoader::create_class_path_entry(char *path, struct stat st, ClassPathEntry **new_entry, bool lazy) { | |
| 422 JavaThread* thread = JavaThread::current(); | |
| 423 if (lazy) { | |
| 424 *new_entry = new LazyClassPathEntry(path, st); | |
| 425 return; | |
| 426 } | |
| 427 if ((st.st_mode & S_IFREG) == S_IFREG) { | |
| 428 // Regular file, should be a zip file | |
| 429 // Canonicalized filename | |
| 430 char canonical_path[JVM_MAXPATHLEN]; | |
| 431 if (!get_canonical_path(path, canonical_path, JVM_MAXPATHLEN)) { | |
| 432 // This matches the classic VM | |
| 433 EXCEPTION_MARK; | |
| 434 THROW_MSG(vmSymbols::java_io_IOException(), "Bad pathname"); | |
| 435 } | |
| 436 char* error_msg = NULL; | |
| 437 jzfile* zip; | |
| 438 { | |
| 439 // enable call to C land | |
| 440 ThreadToNativeFromVM ttn(thread); | |
| 441 HandleMark hm(thread); | |
| 442 zip = (*ZipOpen)(canonical_path, &error_msg); | |
| 443 } | |
| 444 if (zip != NULL && error_msg == NULL) { | |
| 445 *new_entry = new ClassPathZipEntry(zip, path); | |
| 446 if (TraceClassLoading) { | |
| 447 tty->print_cr("[Opened %s]", path); | |
| 448 } | |
| 449 } else { | |
| 450 ResourceMark rm(thread); | |
| 451 char *msg; | |
| 452 if (error_msg == NULL) { | |
| 453 msg = NEW_RESOURCE_ARRAY(char, strlen(path) + 128); ; | |
| 454 jio_snprintf(msg, strlen(path) + 127, "error in opening JAR file %s", path); | |
| 455 } else { | |
| 456 int len = (int)(strlen(path) + strlen(error_msg) + 128); | |
| 457 msg = NEW_RESOURCE_ARRAY(char, len); ; | |
| 458 jio_snprintf(msg, len - 1, "error in opening JAR file <%s> %s", error_msg, path); | |
| 459 } | |
| 460 EXCEPTION_MARK; | |
| 461 THROW_MSG(vmSymbols::java_lang_ClassNotFoundException(), msg); | |
| 462 } | |
| 463 } else { | |
| 464 // Directory | |
| 465 *new_entry = new ClassPathDirEntry(path); | |
| 466 if (TraceClassLoading) { | |
| 467 tty->print_cr("[Path %s]", path); | |
| 468 } | |
| 469 } | |
| 470 } | |
| 471 | |
| 472 | |
| 473 // Create a class path zip entry for a given path (return NULL if not found | |
| 474 // or zip/JAR file cannot be opened) | |
| 475 ClassPathZipEntry* ClassLoader::create_class_path_zip_entry(const char *path) { | |
| 476 // check for a regular file | |
| 477 struct stat st; | |
| 478 if (os::stat(path, &st) == 0) { | |
| 479 if ((st.st_mode & S_IFREG) == S_IFREG) { | |
| 480 char orig_path[JVM_MAXPATHLEN]; | |
| 481 char canonical_path[JVM_MAXPATHLEN]; | |
| 482 | |
| 483 strcpy(orig_path, path); | |
| 484 if (get_canonical_path(orig_path, canonical_path, JVM_MAXPATHLEN)) { | |
| 485 char* error_msg = NULL; | |
| 486 jzfile* zip; | |
| 487 { | |
| 488 // enable call to C land | |
| 489 JavaThread* thread = JavaThread::current(); | |
| 490 ThreadToNativeFromVM ttn(thread); | |
| 491 HandleMark hm(thread); | |
| 492 zip = (*ZipOpen)(canonical_path, &error_msg); | |
| 493 } | |
| 494 if (zip != NULL && error_msg == NULL) { | |
| 495 // create using canonical path | |
| 496 return new ClassPathZipEntry(zip, canonical_path); | |
| 497 } | |
| 498 } | |
| 499 } | |
| 500 } | |
| 501 return NULL; | |
| 502 } | |
| 503 | |
| 504 // returns true if entry already on class path | |
| 505 bool ClassLoader::contains_entry(ClassPathEntry *entry) { | |
| 506 ClassPathEntry* e = _first_entry; | |
| 507 while (e != NULL) { | |
| 508 // assume zip entries have been canonicalized | |
| 509 if (strcmp(entry->name(), e->name()) == 0) { | |
| 510 return true; | |
| 511 } | |
| 512 e = e->next(); | |
| 513 } | |
| 514 return false; | |
| 515 } | |
| 516 | |
| 517 void ClassLoader::add_to_list(ClassPathEntry *new_entry) { | |
| 518 if (new_entry != NULL) { | |
| 519 if (_last_entry == NULL) { | |
| 520 _first_entry = _last_entry = new_entry; | |
| 521 } else { | |
| 522 _last_entry->set_next(new_entry); | |
| 523 _last_entry = new_entry; | |
| 524 } | |
| 525 } | |
| 526 } | |
| 527 | |
| 528 void ClassLoader::update_class_path_entry_list(const char *path, | |
| 529 bool check_for_duplicates) { | |
| 530 struct stat st; | |
| 531 if (os::stat((char *)path, &st) == 0) { | |
| 532 // File or directory found | |
| 533 ClassPathEntry* new_entry = NULL; | |
| 534 create_class_path_entry((char *)path, st, &new_entry, LazyBootClassLoader); | |
| 535 // The kernel VM adds dynamically to the end of the classloader path and | |
| 536 // doesn't reorder the bootclasspath which would break java.lang.Package | |
| 537 // (see PackageInfo). | |
| 538 // Add new entry to linked list | |
| 539 if (!check_for_duplicates || !contains_entry(new_entry)) { | |
| 540 add_to_list(new_entry); | |
| 541 } | |
| 542 } | |
| 543 } | |
| 544 | |
| 545 void ClassLoader::print_bootclasspath() { | |
| 546 ClassPathEntry* e = _first_entry; | |
| 547 tty->print("[bootclasspath= "); | |
| 548 while (e != NULL) { | |
| 549 tty->print("%s ;", e->name()); | |
| 550 e = e->next(); | |
| 551 } | |
| 552 tty->print_cr("]"); | |
| 553 } | |
| 554 | |
| 555 void ClassLoader::load_zip_library() { | |
| 556 assert(ZipOpen == NULL, "should not load zip library twice"); | |
| 557 // First make sure native library is loaded | |
| 558 os::native_java_library(); | |
| 559 // Load zip library | |
| 560 char path[JVM_MAXPATHLEN]; | |
| 561 char ebuf[1024]; | |
| 562 hpi::dll_build_name(path, sizeof(path), Arguments::get_dll_dir(), "zip"); | |
| 563 void* handle = hpi::dll_load(path, ebuf, sizeof ebuf); | |
| 564 if (handle == NULL) { | |
| 565 vm_exit_during_initialization("Unable to load ZIP library", path); | |
| 566 } | |
| 567 // Lookup zip entry points | |
| 568 ZipOpen = CAST_TO_FN_PTR(ZipOpen_t, hpi::dll_lookup(handle, "ZIP_Open")); | |
| 569 ZipClose = CAST_TO_FN_PTR(ZipClose_t, hpi::dll_lookup(handle, "ZIP_Close")); | |
| 570 FindEntry = CAST_TO_FN_PTR(FindEntry_t, hpi::dll_lookup(handle, "ZIP_FindEntry")); | |
| 571 ReadEntry = CAST_TO_FN_PTR(ReadEntry_t, hpi::dll_lookup(handle, "ZIP_ReadEntry")); | |
| 572 ReadMappedEntry = CAST_TO_FN_PTR(ReadMappedEntry_t, hpi::dll_lookup(handle, "ZIP_ReadMappedEntry")); | |
| 573 GetNextEntry = CAST_TO_FN_PTR(GetNextEntry_t, hpi::dll_lookup(handle, "ZIP_GetNextEntry")); | |
| 574 | |
| 575 // ZIP_Close is not exported on Windows in JDK5.0 so don't abort if ZIP_Close is NULL | |
| 576 if (ZipOpen == NULL || FindEntry == NULL || ReadEntry == NULL || GetNextEntry == NULL) { | |
| 577 vm_exit_during_initialization("Corrupted ZIP library", path); | |
| 578 } | |
| 579 | |
| 580 // Lookup canonicalize entry in libjava.dll | |
| 581 void *javalib_handle = os::native_java_library(); | |
| 582 CanonicalizeEntry = CAST_TO_FN_PTR(canonicalize_fn_t, hpi::dll_lookup(javalib_handle, "Canonicalize")); | |
| 583 // This lookup only works on 1.3. Do not check for non-null here | |
| 584 } | |
| 585 | |
| 586 // PackageInfo data exists in order to support the java.lang.Package | |
| 587 // class. A Package object provides information about a java package | |
| 588 // (version, vendor, etc.) which originates in the manifest of the jar | |
| 589 // file supplying the package. For application classes, the ClassLoader | |
| 590 // object takes care of this. | |
| 591 | |
| 592 // For system (boot) classes, the Java code in the Package class needs | |
| 593 // to be able to identify which source jar file contained the boot | |
| 594 // class, so that it can extract the manifest from it. This table | |
| 595 // identifies java packages with jar files in the boot classpath. | |
| 596 | |
| 597 // Because the boot classpath cannot change, the classpath index is | |
| 598 // sufficient to identify the source jar file or directory. (Since | |
| 599 // directories have no manifests, the directory name is not required, | |
| 600 // but is available.) | |
| 601 | |
| 602 // When using sharing -- the pathnames of entries in the boot classpath | |
| 603 // may not be the same at runtime as they were when the archive was | |
| 604 // created (NFS, Samba, etc.). The actual files and directories named | |
| 605 // in the classpath must be the same files, in the same order, even | |
| 606 // though the exact name is not the same. | |
| 607 | |
| 608 class PackageInfo: public BasicHashtableEntry { | |
| 609 public: | |
| 610 const char* _pkgname; // Package name | |
| 611 int _classpath_index; // Index of directory or JAR file loaded from | |
| 612 | |
| 613 PackageInfo* next() { | |
| 614 return (PackageInfo*)BasicHashtableEntry::next(); | |
| 615 } | |
| 616 | |
| 617 const char* pkgname() { return _pkgname; } | |
| 618 void set_pkgname(char* pkgname) { _pkgname = pkgname; } | |
| 619 | |
| 620 const char* filename() { | |
| 621 return ClassLoader::classpath_entry(_classpath_index)->name(); | |
| 622 } | |
| 623 | |
| 624 void set_index(int index) { | |
| 625 _classpath_index = index; | |
| 626 } | |
| 627 }; | |
| 628 | |
| 629 | |
| 630 class PackageHashtable : public BasicHashtable { | |
| 631 private: | |
| 632 inline unsigned int compute_hash(const char *s, int n) { | |
| 633 unsigned int val = 0; | |
| 634 while (--n >= 0) { | |
| 635 val = *s++ + 31 * val; | |
| 636 } | |
| 637 return val; | |
| 638 } | |
| 639 | |
| 640 PackageInfo* bucket(int index) { | |
| 641 return (PackageInfo*)BasicHashtable::bucket(index); | |
| 642 } | |
| 643 | |
| 644 PackageInfo* get_entry(int index, unsigned int hash, | |
| 645 const char* pkgname, size_t n) { | |
| 646 for (PackageInfo* pp = bucket(index); pp != NULL; pp = pp->next()) { | |
| 647 if (pp->hash() == hash && | |
| 648 strncmp(pkgname, pp->pkgname(), n) == 0 && | |
| 649 pp->pkgname()[n] == '\0') { | |
| 650 return pp; | |
| 651 } | |
| 652 } | |
| 653 return NULL; | |
| 654 } | |
| 655 | |
| 656 public: | |
| 657 PackageHashtable(int table_size) | |
| 658 : BasicHashtable(table_size, sizeof(PackageInfo)) {} | |
| 659 | |
| 660 PackageHashtable(int table_size, HashtableBucket* t, int number_of_entries) | |
| 661 : BasicHashtable(table_size, sizeof(PackageInfo), t, number_of_entries) {} | |
| 662 | |
| 663 PackageInfo* get_entry(const char* pkgname, int n) { | |
| 664 unsigned int hash = compute_hash(pkgname, n); | |
| 665 return get_entry(hash_to_index(hash), hash, pkgname, n); | |
| 666 } | |
| 667 | |
| 668 PackageInfo* new_entry(char* pkgname, int n) { | |
| 669 unsigned int hash = compute_hash(pkgname, n); | |
| 670 PackageInfo* pp; | |
| 671 pp = (PackageInfo*)BasicHashtable::new_entry(hash); | |
| 672 pp->set_pkgname(pkgname); | |
| 673 return pp; | |
| 674 } | |
| 675 | |
| 676 void add_entry(PackageInfo* pp) { | |
| 677 int index = hash_to_index(pp->hash()); | |
| 678 BasicHashtable::add_entry(index, pp); | |
| 679 } | |
| 680 | |
| 681 void copy_pkgnames(const char** packages) { | |
| 682 int n = 0; | |
| 683 for (int i = 0; i < table_size(); ++i) { | |
| 684 for (PackageInfo* pp = bucket(i); pp != NULL; pp = pp->next()) { | |
| 685 packages[n++] = pp->pkgname(); | |
| 686 } | |
| 687 } | |
| 688 assert(n == number_of_entries(), "just checking"); | |
| 689 } | |
| 690 | |
| 691 void copy_table(char** top, char* end, PackageHashtable* table); | |
| 692 }; | |
| 693 | |
| 694 | |
| 695 void PackageHashtable::copy_table(char** top, char* end, | |
| 696 PackageHashtable* table) { | |
| 697 // Copy (relocate) the table to the shared space. | |
| 698 BasicHashtable::copy_table(top, end); | |
| 699 | |
| 700 // Calculate the space needed for the package name strings. | |
| 701 int i; | |
| 702 int n = 0; | |
| 703 for (i = 0; i < table_size(); ++i) { | |
| 704 for (PackageInfo* pp = table->bucket(i); | |
| 705 pp != NULL; | |
| 706 pp = pp->next()) { | |
| 707 n += (int)(strlen(pp->pkgname()) + 1); | |
| 708 } | |
| 709 } | |
| 710 if (*top + n + sizeof(intptr_t) >= end) { | |
| 711 warning("\nThe shared miscellaneous data space is not large " | |
| 712 "enough to \npreload requested classes. Use " | |
| 713 "-XX:SharedMiscDataSize= to increase \nthe initial " | |
| 714 "size of the miscellaneous data space.\n"); | |
| 715 exit(2); | |
| 716 } | |
| 717 | |
| 718 // Copy the table data (the strings) to the shared space. | |
| 719 n = align_size_up(n, sizeof(HeapWord)); | |
| 720 *(intptr_t*)(*top) = n; | |
| 721 *top += sizeof(intptr_t); | |
| 722 | |
| 723 for (i = 0; i < table_size(); ++i) { | |
| 724 for (PackageInfo* pp = table->bucket(i); | |
| 725 pp != NULL; | |
| 726 pp = pp->next()) { | |
| 727 int n1 = (int)(strlen(pp->pkgname()) + 1); | |
| 728 pp->set_pkgname((char*)memcpy(*top, pp->pkgname(), n1)); | |
| 729 *top += n1; | |
| 730 } | |
| 731 } | |
| 732 *top = (char*)align_size_up((intptr_t)*top, sizeof(HeapWord)); | |
| 733 } | |
| 734 | |
| 735 | |
| 736 void ClassLoader::copy_package_info_buckets(char** top, char* end) { | |
| 737 _package_hash_table->copy_buckets(top, end); | |
| 738 } | |
| 739 | |
| 740 void ClassLoader::copy_package_info_table(char** top, char* end) { | |
| 741 _package_hash_table->copy_table(top, end, _package_hash_table); | |
| 742 } | |
| 743 | |
| 744 | |
| 745 PackageInfo* ClassLoader::lookup_package(const char *pkgname) { | |
| 746 const char *cp = strrchr(pkgname, '/'); | |
| 747 if (cp != NULL) { | |
| 748 // Package prefix found | |
| 749 int n = cp - pkgname + 1; | |
| 750 return _package_hash_table->get_entry(pkgname, n); | |
| 751 } | |
| 752 return NULL; | |
| 753 } | |
| 754 | |
| 755 | |
| 756 bool ClassLoader::add_package(const char *pkgname, int classpath_index, TRAPS) { | |
| 757 assert(pkgname != NULL, "just checking"); | |
| 758 // Bootstrap loader no longer holds system loader lock obj serializing | |
| 759 // load_instance_class and thereby add_package | |
| 760 { | |
| 761 MutexLocker ml(PackageTable_lock, THREAD); | |
| 762 // First check for previously loaded entry | |
| 763 PackageInfo* pp = lookup_package(pkgname); | |
| 764 if (pp != NULL) { | |
| 765 // Existing entry found, check source of package | |
| 766 pp->set_index(classpath_index); | |
| 767 return true; | |
| 768 } | |
| 769 | |
| 770 const char *cp = strrchr(pkgname, '/'); | |
| 771 if (cp != NULL) { | |
| 772 // Package prefix found | |
| 773 int n = cp - pkgname + 1; | |
| 774 | |
| 775 char* new_pkgname = NEW_C_HEAP_ARRAY(char, n + 1); | |
| 776 if (new_pkgname == NULL) { | |
| 777 return false; | |
| 778 } | |
| 779 | |
| 780 memcpy(new_pkgname, pkgname, n); | |
| 781 new_pkgname[n] = '\0'; | |
| 782 pp = _package_hash_table->new_entry(new_pkgname, n); | |
| 783 pp->set_index(classpath_index); | |
| 784 | |
| 785 // Insert into hash table | |
| 786 _package_hash_table->add_entry(pp); | |
| 787 } | |
| 788 return true; | |
| 789 } | |
| 790 } | |
| 791 | |
| 792 | |
| 793 oop ClassLoader::get_system_package(const char* name, TRAPS) { | |
| 794 PackageInfo* pp; | |
| 795 { | |
| 796 MutexLocker ml(PackageTable_lock, THREAD); | |
| 797 pp = lookup_package(name); | |
| 798 } | |
| 799 if (pp == NULL) { | |
| 800 return NULL; | |
| 801 } else { | |
| 802 Handle p = java_lang_String::create_from_str(pp->filename(), THREAD); | |
| 803 return p(); | |
| 804 } | |
| 805 } | |
| 806 | |
| 807 | |
| 808 objArrayOop ClassLoader::get_system_packages(TRAPS) { | |
| 809 ResourceMark rm(THREAD); | |
| 810 int nof_entries; | |
| 811 const char** packages; | |
| 812 { | |
| 813 MutexLocker ml(PackageTable_lock, THREAD); | |
| 814 // Allocate resource char* array containing package names | |
| 815 nof_entries = _package_hash_table->number_of_entries(); | |
| 816 if ((packages = NEW_RESOURCE_ARRAY(const char*, nof_entries)) == NULL) { | |
| 817 return NULL; | |
| 818 } | |
| 819 _package_hash_table->copy_pkgnames(packages); | |
| 820 } | |
| 821 // Allocate objArray and fill with java.lang.String | |
| 822 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(), | |
| 823 nof_entries, CHECK_0); | |
| 824 objArrayHandle result(THREAD, r); | |
| 825 for (int i = 0; i < nof_entries; i++) { | |
| 826 Handle str = java_lang_String::create_from_str(packages[i], CHECK_0); | |
| 827 result->obj_at_put(i, str()); | |
| 828 } | |
| 829 | |
| 830 return result(); | |
| 831 } | |
| 832 | |
| 833 | |
| 834 instanceKlassHandle ClassLoader::load_classfile(symbolHandle h_name, TRAPS) { | |
| 835 VTuneClassLoadMarker clm; | |
| 836 ResourceMark rm(THREAD); | |
| 837 EventMark m("loading class " INTPTR_FORMAT, (address)h_name()); | |
| 838 ThreadProfilerMark tpm(ThreadProfilerMark::classLoaderRegion); | |
| 839 | |
| 840 stringStream st; | |
| 841 // st.print() uses too much stack space while handling a StackOverflowError | |
| 842 // st.print("%s.class", h_name->as_utf8()); | |
| 843 st.print_raw(h_name->as_utf8()); | |
| 844 st.print_raw(".class"); | |
| 845 char* name = st.as_string(); | |
| 846 | |
| 847 // Lookup stream for parsing .class file | |
| 848 ClassFileStream* stream = NULL; | |
| 849 int classpath_index = 0; | |
| 850 { | |
|
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851 PerfClassTraceTime vmtimer(perf_sys_class_lookup_time(), |
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852 ((JavaThread*) THREAD)->get_thread_stat()->perf_timers_addr(), |
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853 PerfClassTraceTime::CLASS_LOAD); |
| 0 | 854 ClassPathEntry* e = _first_entry; |
| 855 while (e != NULL) { | |
| 856 stream = e->open_stream(name); | |
| 857 if (stream != NULL) { | |
| 858 break; | |
| 859 } | |
| 860 e = e->next(); | |
| 861 ++classpath_index; | |
| 862 } | |
| 863 } | |
| 864 | |
| 865 instanceKlassHandle h(THREAD, klassOop(NULL)); | |
| 866 if (stream != NULL) { | |
| 867 | |
| 868 // class file found, parse it | |
| 869 ClassFileParser parser(stream); | |
| 870 Handle class_loader; | |
| 871 Handle protection_domain; | |
| 872 symbolHandle parsed_name; | |
| 873 instanceKlassHandle result = parser.parseClassFile(h_name, | |
| 874 class_loader, | |
| 875 protection_domain, | |
| 876 parsed_name, | |
|
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877 false, |
| 0 | 878 CHECK_(h)); |
| 879 | |
| 880 // add to package table | |
| 881 if (add_package(name, classpath_index, THREAD)) { | |
| 882 h = result; | |
| 883 } | |
| 884 } | |
| 885 | |
| 886 return h; | |
| 887 } | |
| 888 | |
| 889 | |
| 890 void ClassLoader::create_package_info_table(HashtableBucket *t, int length, | |
| 891 int number_of_entries) { | |
| 892 assert(_package_hash_table == NULL, "One package info table allowed."); | |
| 893 assert(length == package_hash_table_size * sizeof(HashtableBucket), | |
| 894 "bad shared package info size."); | |
| 895 _package_hash_table = new PackageHashtable(package_hash_table_size, t, | |
| 896 number_of_entries); | |
| 897 } | |
| 898 | |
| 899 | |
| 900 void ClassLoader::create_package_info_table() { | |
| 901 assert(_package_hash_table == NULL, "shouldn't have one yet"); | |
| 902 _package_hash_table = new PackageHashtable(package_hash_table_size); | |
| 903 } | |
| 904 | |
| 905 | |
| 906 // Initialize the class loader's access to methods in libzip. Parse and | |
| 907 // process the boot classpath into a list ClassPathEntry objects. Once | |
| 908 // this list has been created, it must not change order (see class PackageInfo) | |
| 909 // it can be appended to and is by jvmti and the kernel vm. | |
| 910 | |
| 911 void ClassLoader::initialize() { | |
| 912 assert(_package_hash_table == NULL, "should have been initialized by now."); | |
| 913 EXCEPTION_MARK; | |
| 914 | |
| 915 if (UsePerfData) { | |
| 916 // jvmstat performance counters | |
| 917 NEWPERFTICKCOUNTER(_perf_accumulated_time, SUN_CLS, "time"); | |
| 918 NEWPERFTICKCOUNTER(_perf_class_init_time, SUN_CLS, "classInitTime"); | |
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919 NEWPERFTICKCOUNTER(_perf_class_init_selftime, SUN_CLS, "classInitTime.self"); |
| 0 | 920 NEWPERFTICKCOUNTER(_perf_class_verify_time, SUN_CLS, "classVerifyTime"); |
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921 NEWPERFTICKCOUNTER(_perf_class_verify_selftime, SUN_CLS, "classVerifyTime.self"); |
| 0 | 922 NEWPERFTICKCOUNTER(_perf_class_link_time, SUN_CLS, "classLinkedTime"); |
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923 NEWPERFTICKCOUNTER(_perf_class_link_selftime, SUN_CLS, "classLinkedTime.self"); |
| 0 | 924 NEWPERFEVENTCOUNTER(_perf_classes_inited, SUN_CLS, "initializedClasses"); |
| 925 NEWPERFEVENTCOUNTER(_perf_classes_linked, SUN_CLS, "linkedClasses"); | |
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926 NEWPERFEVENTCOUNTER(_perf_classes_verified, SUN_CLS, "verifiedClasses"); |
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927 |
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928 NEWPERFTICKCOUNTER(_perf_class_parse_time, SUN_CLS, "parseClassTime"); |
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929 NEWPERFTICKCOUNTER(_perf_class_parse_selftime, SUN_CLS, "parseClassTime.self"); |
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930 NEWPERFTICKCOUNTER(_perf_sys_class_lookup_time, SUN_CLS, "lookupSysClassTime"); |
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931 NEWPERFTICKCOUNTER(_perf_shared_classload_time, SUN_CLS, "sharedClassLoadTime"); |
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932 NEWPERFTICKCOUNTER(_perf_sys_classload_time, SUN_CLS, "sysClassLoadTime"); |
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933 NEWPERFTICKCOUNTER(_perf_app_classload_time, SUN_CLS, "appClassLoadTime"); |
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934 NEWPERFTICKCOUNTER(_perf_app_classload_selftime, SUN_CLS, "appClassLoadTime.self"); |
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935 NEWPERFEVENTCOUNTER(_perf_app_classload_count, SUN_CLS, "appClassLoadCount"); |
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936 NEWPERFTICKCOUNTER(_perf_define_appclasses, SUN_CLS, "defineAppClasses"); |
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937 NEWPERFTICKCOUNTER(_perf_define_appclass_time, SUN_CLS, "defineAppClassTime"); |
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938 NEWPERFTICKCOUNTER(_perf_define_appclass_selftime, SUN_CLS, "defineAppClassTime.self"); |
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939 NEWPERFBYTECOUNTER(_perf_app_classfile_bytes_read, SUN_CLS, "appClassBytes"); |
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940 NEWPERFBYTECOUNTER(_perf_sys_classfile_bytes_read, SUN_CLS, "sysClassBytes"); |
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941 |
| 0 | 942 |
| 943 // The following performance counters are added for measuring the impact | |
| 944 // of the bug fix of 6365597. They are mainly focused on finding out | |
| 945 // the behavior of system & user-defined classloader lock, whether | |
| 946 // ClassLoader.loadClass/findClass is being called synchronized or not. | |
| 947 // Also two additional counters are created to see whether 'UnsyncloadClass' | |
| 948 // flag is being set or not and how many times load_instance_class call | |
| 949 // fails with linkageError etc. | |
| 950 NEWPERFEVENTCOUNTER(_sync_systemLoaderLockContentionRate, SUN_CLS, | |
| 951 "systemLoaderLockContentionRate"); | |
| 952 NEWPERFEVENTCOUNTER(_sync_nonSystemLoaderLockContentionRate, SUN_CLS, | |
| 953 "nonSystemLoaderLockContentionRate"); | |
| 954 NEWPERFEVENTCOUNTER(_sync_JVMFindLoadedClassLockFreeCounter, SUN_CLS, | |
| 955 "jvmFindLoadedClassNoLockCalls"); | |
| 956 NEWPERFEVENTCOUNTER(_sync_JVMDefineClassLockFreeCounter, SUN_CLS, | |
| 957 "jvmDefineClassNoLockCalls"); | |
| 958 | |
| 959 NEWPERFEVENTCOUNTER(_sync_JNIDefineClassLockFreeCounter, SUN_CLS, | |
| 960 "jniDefineClassNoLockCalls"); | |
| 961 | |
| 962 NEWPERFEVENTCOUNTER(_unsafe_defineClassCallCounter, SUN_CLS, | |
| 963 "unsafeDefineClassCalls"); | |
| 964 | |
| 965 NEWPERFEVENTCOUNTER(_isUnsyncloadClass, SUN_CLS, "isUnsyncloadClassSet"); | |
| 966 NEWPERFEVENTCOUNTER(_load_instance_class_failCounter, SUN_CLS, | |
| 967 "loadInstanceClassFailRate"); | |
| 968 | |
| 969 // increment the isUnsyncloadClass counter if UnsyncloadClass is set. | |
| 970 if (UnsyncloadClass) { | |
| 971 _isUnsyncloadClass->inc(); | |
| 972 } | |
| 973 } | |
| 974 | |
| 975 // lookup zip library entry points | |
| 976 load_zip_library(); | |
| 977 // initialize search path | |
| 978 setup_bootstrap_search_path(); | |
| 979 if (LazyBootClassLoader) { | |
| 980 // set up meta index which makes boot classpath initialization lazier | |
| 981 setup_meta_index(); | |
| 982 } | |
| 983 } | |
| 984 | |
| 985 | |
| 986 jlong ClassLoader::classloader_time_ms() { | |
| 987 return UsePerfData ? | |
| 988 Management::ticks_to_ms(_perf_accumulated_time->get_value()) : -1; | |
| 989 } | |
| 990 | |
| 991 jlong ClassLoader::class_init_count() { | |
| 992 return UsePerfData ? _perf_classes_inited->get_value() : -1; | |
| 993 } | |
| 994 | |
| 995 jlong ClassLoader::class_init_time_ms() { | |
| 996 return UsePerfData ? | |
| 997 Management::ticks_to_ms(_perf_class_init_time->get_value()) : -1; | |
| 998 } | |
| 999 | |
| 1000 jlong ClassLoader::class_verify_time_ms() { | |
| 1001 return UsePerfData ? | |
| 1002 Management::ticks_to_ms(_perf_class_verify_time->get_value()) : -1; | |
| 1003 } | |
| 1004 | |
| 1005 jlong ClassLoader::class_link_count() { | |
| 1006 return UsePerfData ? _perf_classes_linked->get_value() : -1; | |
| 1007 } | |
| 1008 | |
| 1009 jlong ClassLoader::class_link_time_ms() { | |
| 1010 return UsePerfData ? | |
| 1011 Management::ticks_to_ms(_perf_class_link_time->get_value()) : -1; | |
| 1012 } | |
| 1013 | |
| 1014 int ClassLoader::compute_Object_vtable() { | |
| 1015 // hardwired for JDK1.2 -- would need to duplicate class file parsing | |
| 1016 // code to determine actual value from file | |
| 1017 // Would be value '11' if finals were in vtable | |
| 1018 int JDK_1_2_Object_vtable_size = 5; | |
| 1019 return JDK_1_2_Object_vtable_size * vtableEntry::size(); | |
| 1020 } | |
| 1021 | |
| 1022 | |
| 1023 void classLoader_init() { | |
| 1024 ClassLoader::initialize(); | |
| 1025 } | |
| 1026 | |
| 1027 | |
| 1028 bool ClassLoader::get_canonical_path(char* orig, char* out, int len) { | |
| 1029 assert(orig != NULL && out != NULL && len > 0, "bad arguments"); | |
| 1030 if (CanonicalizeEntry != NULL) { | |
| 1031 JNIEnv* env = JavaThread::current()->jni_environment(); | |
| 1032 if ((CanonicalizeEntry)(env, hpi::native_path(orig), out, len) < 0) { | |
| 1033 return false; | |
| 1034 } | |
| 1035 } else { | |
| 1036 // On JDK 1.2.2 the Canonicalize does not exist, so just do nothing | |
| 1037 strncpy(out, orig, len); | |
| 1038 out[len - 1] = '\0'; | |
| 1039 } | |
| 1040 return true; | |
| 1041 } | |
| 1042 | |
| 1043 #ifndef PRODUCT | |
| 1044 | |
| 1045 void ClassLoader::verify() { | |
| 1046 _package_hash_table->verify(); | |
| 1047 } | |
| 1048 | |
| 1049 | |
| 1050 // CompileTheWorld | |
| 1051 // | |
| 1052 // Iterates over all class path entries and forces compilation of all methods | |
| 1053 // in all classes found. Currently, only zip/jar archives are searched. | |
| 1054 // | |
| 1055 // The classes are loaded by the Java level bootstrap class loader, and the | |
| 1056 // initializer is called. If DelayCompilationDuringStartup is true (default), | |
| 1057 // the interpreter will run the initialization code. Note that forcing | |
| 1058 // initialization in this way could potentially lead to initialization order | |
| 1059 // problems, in which case we could just force the initialization bit to be set. | |
| 1060 | |
| 1061 | |
| 1062 // We need to iterate over the contents of a zip/jar file, so we replicate the | |
| 1063 // jzcell and jzfile definitions from zip_util.h but rename jzfile to real_jzfile, | |
| 1064 // since jzfile already has a void* definition. | |
| 1065 // | |
| 1066 // Note that this is only used in debug mode. | |
| 1067 // | |
| 1068 // HotSpot integration note: | |
| 1069 // Matches zip_util.h 1.14 99/06/01 from jdk1.3 beta H build | |
| 1070 | |
| 1071 | |
| 1072 // JDK 1.3 version | |
| 1073 typedef struct real_jzentry13 { /* Zip file entry */ | |
| 1074 char *name; /* entry name */ | |
| 1075 jint time; /* modification time */ | |
| 1076 jint size; /* size of uncompressed data */ | |
| 1077 jint csize; /* size of compressed data (zero if uncompressed) */ | |
| 1078 jint crc; /* crc of uncompressed data */ | |
| 1079 char *comment; /* optional zip file comment */ | |
| 1080 jbyte *extra; /* optional extra data */ | |
| 1081 jint pos; /* position of LOC header (if negative) or data */ | |
| 1082 } real_jzentry13; | |
| 1083 | |
| 1084 typedef struct real_jzfile13 { /* Zip file */ | |
| 1085 char *name; /* zip file name */ | |
| 1086 jint refs; /* number of active references */ | |
| 1087 jint fd; /* open file descriptor */ | |
| 1088 void *lock; /* read lock */ | |
| 1089 char *comment; /* zip file comment */ | |
| 1090 char *msg; /* zip error message */ | |
| 1091 void *entries; /* array of hash cells */ | |
| 1092 jint total; /* total number of entries */ | |
| 1093 unsigned short *table; /* Hash chain heads: indexes into entries */ | |
| 1094 jint tablelen; /* number of hash eads */ | |
| 1095 real_jzfile13 *next; /* next zip file in search list */ | |
| 1096 jzentry *cache; /* we cache the most recently freed jzentry */ | |
| 1097 /* Information on metadata names in META-INF directory */ | |
| 1098 char **metanames; /* array of meta names (may have null names) */ | |
| 1099 jint metacount; /* number of slots in metanames array */ | |
| 1100 /* If there are any per-entry comments, they are in the comments array */ | |
| 1101 char **comments; | |
| 1102 } real_jzfile13; | |
| 1103 | |
| 1104 // JDK 1.2 version | |
| 1105 typedef struct real_jzentry12 { /* Zip file entry */ | |
| 1106 char *name; /* entry name */ | |
| 1107 jint time; /* modification time */ | |
| 1108 jint size; /* size of uncompressed data */ | |
| 1109 jint csize; /* size of compressed data (zero if uncompressed) */ | |
| 1110 jint crc; /* crc of uncompressed data */ | |
| 1111 char *comment; /* optional zip file comment */ | |
| 1112 jbyte *extra; /* optional extra data */ | |
| 1113 jint pos; /* position of LOC header (if negative) or data */ | |
| 1114 struct real_jzentry12 *next; /* next entry in hash table */ | |
| 1115 } real_jzentry12; | |
| 1116 | |
| 1117 typedef struct real_jzfile12 { /* Zip file */ | |
| 1118 char *name; /* zip file name */ | |
| 1119 jint refs; /* number of active references */ | |
| 1120 jint fd; /* open file descriptor */ | |
| 1121 void *lock; /* read lock */ | |
| 1122 char *comment; /* zip file comment */ | |
| 1123 char *msg; /* zip error message */ | |
| 1124 real_jzentry12 *entries; /* array of zip entries */ | |
| 1125 jint total; /* total number of entries */ | |
| 1126 real_jzentry12 **table; /* hash table of entries */ | |
| 1127 jint tablelen; /* number of buckets */ | |
| 1128 jzfile *next; /* next zip file in search list */ | |
| 1129 } real_jzfile12; | |
| 1130 | |
| 1131 | |
| 1132 void ClassPathDirEntry::compile_the_world(Handle loader, TRAPS) { | |
| 1133 // For now we only compile all methods in all classes in zip/jar files | |
| 1134 tty->print_cr("CompileTheWorld : Skipped classes in %s", _dir); | |
| 1135 tty->cr(); | |
| 1136 } | |
| 1137 | |
| 1138 | |
| 1139 bool ClassPathDirEntry::is_rt_jar() { | |
| 1140 return false; | |
| 1141 } | |
| 1142 | |
| 1143 void ClassPathZipEntry::compile_the_world(Handle loader, TRAPS) { | |
| 1144 if (JDK_Version::is_jdk12x_version()) { | |
| 1145 compile_the_world12(loader, THREAD); | |
| 1146 } else { | |
| 1147 compile_the_world13(loader, THREAD); | |
| 1148 } | |
| 1149 if (HAS_PENDING_EXCEPTION) { | |
| 1150 if (PENDING_EXCEPTION->is_a(SystemDictionary::OutOfMemoryError_klass())) { | |
| 1151 CLEAR_PENDING_EXCEPTION; | |
| 1152 tty->print_cr("\nCompileTheWorld : Ran out of memory\n"); | |
| 1153 size_t used = Universe::heap()->permanent_used(); | |
| 1154 size_t capacity = Universe::heap()->permanent_capacity(); | |
| 1155 tty->print_cr("Permanent generation used %dK of %dK", used/K, capacity/K); | |
| 1156 tty->print_cr("Increase size by setting e.g. -XX:MaxPermSize=%dK\n", capacity*2/K); | |
| 1157 } else { | |
| 1158 tty->print_cr("\nCompileTheWorld : Unexpected exception occurred\n"); | |
| 1159 } | |
| 1160 } | |
| 1161 } | |
| 1162 | |
| 1163 // Version that works for JDK 1.3.x | |
| 1164 void ClassPathZipEntry::compile_the_world13(Handle loader, TRAPS) { | |
| 1165 real_jzfile13* zip = (real_jzfile13*) _zip; | |
| 1166 tty->print_cr("CompileTheWorld : Compiling all classes in %s", zip->name); | |
| 1167 tty->cr(); | |
| 1168 // Iterate over all entries in zip file | |
| 1169 for (int n = 0; ; n++) { | |
| 1170 real_jzentry13 * ze = (real_jzentry13 *)((*GetNextEntry)(_zip, n)); | |
| 1171 if (ze == NULL) break; | |
| 1172 ClassLoader::compile_the_world_in(ze->name, loader, CHECK); | |
| 1173 } | |
| 1174 } | |
| 1175 | |
| 1176 | |
| 1177 // Version that works for JDK 1.2.x | |
| 1178 void ClassPathZipEntry::compile_the_world12(Handle loader, TRAPS) { | |
| 1179 real_jzfile12* zip = (real_jzfile12*) _zip; | |
| 1180 tty->print_cr("CompileTheWorld : Compiling all classes in %s", zip->name); | |
| 1181 tty->cr(); | |
| 1182 // Iterate over all entries in zip file | |
| 1183 for (int n = 0; ; n++) { | |
| 1184 real_jzentry12 * ze = (real_jzentry12 *)((*GetNextEntry)(_zip, n)); | |
| 1185 if (ze == NULL) break; | |
| 1186 ClassLoader::compile_the_world_in(ze->name, loader, CHECK); | |
| 1187 } | |
| 1188 } | |
| 1189 | |
| 1190 bool ClassPathZipEntry::is_rt_jar() { | |
| 1191 if (JDK_Version::is_jdk12x_version()) { | |
| 1192 return is_rt_jar12(); | |
| 1193 } else { | |
| 1194 return is_rt_jar13(); | |
| 1195 } | |
| 1196 } | |
| 1197 | |
| 1198 // JDK 1.3 version | |
| 1199 bool ClassPathZipEntry::is_rt_jar13() { | |
| 1200 real_jzfile13* zip = (real_jzfile13*) _zip; | |
| 1201 int len = (int)strlen(zip->name); | |
| 1202 // Check whether zip name ends in "rt.jar" | |
| 1203 // This will match other archives named rt.jar as well, but this is | |
| 1204 // only used for debugging. | |
| 1205 return (len >= 6) && (strcasecmp(zip->name + len - 6, "rt.jar") == 0); | |
| 1206 } | |
| 1207 | |
| 1208 // JDK 1.2 version | |
| 1209 bool ClassPathZipEntry::is_rt_jar12() { | |
| 1210 real_jzfile12* zip = (real_jzfile12*) _zip; | |
| 1211 int len = (int)strlen(zip->name); | |
| 1212 // Check whether zip name ends in "rt.jar" | |
| 1213 // This will match other archives named rt.jar as well, but this is | |
| 1214 // only used for debugging. | |
| 1215 return (len >= 6) && (strcasecmp(zip->name + len - 6, "rt.jar") == 0); | |
| 1216 } | |
| 1217 | |
| 1218 void LazyClassPathEntry::compile_the_world(Handle loader, TRAPS) { | |
| 1219 resolve_entry()->compile_the_world(loader, CHECK); | |
| 1220 } | |
| 1221 | |
| 1222 bool LazyClassPathEntry::is_rt_jar() { | |
| 1223 return resolve_entry()->is_rt_jar(); | |
| 1224 } | |
| 1225 | |
| 1226 void ClassLoader::compile_the_world() { | |
| 1227 EXCEPTION_MARK; | |
| 1228 HandleMark hm(THREAD); | |
| 1229 ResourceMark rm(THREAD); | |
| 1230 // Make sure we don't run with background compilation | |
| 1231 BackgroundCompilation = false; | |
| 1232 // Find bootstrap loader | |
| 1233 Handle system_class_loader (THREAD, SystemDictionary::java_system_loader()); | |
| 1234 // Iterate over all bootstrap class path entries | |
| 1235 ClassPathEntry* e = _first_entry; | |
| 1236 while (e != NULL) { | |
| 1237 // We stop at rt.jar, unless it is the first bootstrap path entry | |
| 1238 if (e->is_rt_jar() && e != _first_entry) break; | |
| 1239 e->compile_the_world(system_class_loader, CATCH); | |
| 1240 e = e->next(); | |
| 1241 } | |
| 1242 tty->print_cr("CompileTheWorld : Done"); | |
| 1243 { | |
| 1244 // Print statistics as if before normal exit: | |
| 1245 extern void print_statistics(); | |
| 1246 print_statistics(); | |
| 1247 } | |
| 1248 vm_exit(0); | |
| 1249 } | |
| 1250 | |
| 1251 int ClassLoader::_compile_the_world_counter = 0; | |
| 1252 | |
| 1253 void ClassLoader::compile_the_world_in(char* name, Handle loader, TRAPS) { | |
| 1254 int len = (int)strlen(name); | |
| 1255 if (len > 6 && strcmp(".class", name + len - 6) == 0) { | |
| 1256 // We have a .class file | |
| 1257 char buffer[2048]; | |
| 1258 strncpy(buffer, name, len - 6); | |
| 1259 buffer[len-6] = 0; | |
| 1260 // If the file has a period after removing .class, it's not really a | |
| 1261 // valid class file. The class loader will check everything else. | |
| 1262 if (strchr(buffer, '.') == NULL) { | |
| 1263 _compile_the_world_counter++; | |
| 723 | 1264 if (_compile_the_world_counter > CompileTheWorldStopAt) return; |
| 1265 | |
| 1266 // Construct name without extension | |
| 1267 symbolHandle sym = oopFactory::new_symbol_handle(buffer, CHECK); | |
| 1268 // Use loader to load and initialize class | |
| 1269 klassOop ik = SystemDictionary::resolve_or_null(sym, loader, Handle(), THREAD); | |
| 1270 instanceKlassHandle k (THREAD, ik); | |
| 1271 if (k.not_null() && !HAS_PENDING_EXCEPTION) { | |
| 1272 k->initialize(THREAD); | |
| 1273 } | |
| 1274 bool exception_occurred = HAS_PENDING_EXCEPTION; | |
| 1275 CLEAR_PENDING_EXCEPTION; | |
| 1276 if (CompileTheWorldPreloadClasses && k.not_null()) { | |
| 1277 constantPoolKlass::preload_and_initialize_all_classes(k->constants(), THREAD); | |
| 1278 if (HAS_PENDING_EXCEPTION) { | |
| 1279 // If something went wrong in preloading we just ignore it | |
| 1280 CLEAR_PENDING_EXCEPTION; | |
| 1281 tty->print_cr("Preloading failed for (%d) %s", _compile_the_world_counter, buffer); | |
| 0 | 1282 } |
| 723 | 1283 } |
| 1284 | |
| 1285 if (_compile_the_world_counter >= CompileTheWorldStartAt) { | |
| 0 | 1286 if (k.is_null() || (exception_occurred && !CompileTheWorldIgnoreInitErrors)) { |
| 1287 // If something went wrong (e.g. ExceptionInInitializerError) we skip this class | |
| 1288 tty->print_cr("CompileTheWorld (%d) : Skipping %s", _compile_the_world_counter, buffer); | |
| 1289 } else { | |
| 1290 tty->print_cr("CompileTheWorld (%d) : %s", _compile_the_world_counter, buffer); | |
| 1291 // Preload all classes to get around uncommon traps | |
| 1292 // Iterate over all methods in class | |
| 1293 for (int n = 0; n < k->methods()->length(); n++) { | |
| 1294 methodHandle m (THREAD, methodOop(k->methods()->obj_at(n))); | |
| 1295 if (CompilationPolicy::canBeCompiled(m)) { | |
| 1296 // Force compilation | |
| 1297 CompileBroker::compile_method(m, InvocationEntryBci, | |
| 1298 methodHandle(), 0, "CTW", THREAD); | |
| 1299 if (HAS_PENDING_EXCEPTION) { | |
| 1300 CLEAR_PENDING_EXCEPTION; | |
| 1301 tty->print_cr("CompileTheWorld (%d) : Skipping method: %s", _compile_the_world_counter, m->name()->as_C_string()); | |
| 1302 } | |
| 723 | 1303 if (TieredCompilation) { |
| 1304 // Clobber the first compile and force second tier compilation | |
| 1305 nmethod* nm = m->code(); | |
| 1306 if (nm != NULL) { | |
| 1307 // Throw out the code so that the code cache doesn't fill up | |
| 1308 nm->make_not_entrant(); | |
| 1309 m->clear_code(); | |
| 1310 } | |
| 1311 CompileBroker::compile_method(m, InvocationEntryBci, | |
| 1312 methodHandle(), 0, "CTW", THREAD); | |
| 1313 if (HAS_PENDING_EXCEPTION) { | |
| 1314 CLEAR_PENDING_EXCEPTION; | |
| 1315 tty->print_cr("CompileTheWorld (%d) : Skipping method: %s", _compile_the_world_counter, m->name()->as_C_string()); | |
| 1316 } | |
| 0 | 1317 } |
| 1318 } | |
| 723 | 1319 |
| 1320 nmethod* nm = m->code(); | |
| 1321 if (nm != NULL) { | |
| 1322 // Throw out the code so that the code cache doesn't fill up | |
| 1323 nm->make_not_entrant(); | |
| 1324 m->clear_code(); | |
| 0 | 1325 } |
| 1326 } | |
| 1327 } | |
| 1328 } | |
| 1329 } | |
| 1330 } | |
| 1331 } | |
| 1332 | |
| 1333 #endif //PRODUCT |