rev 2 : [mq]: wkk.patch
1 /* 2 * Copyright 1997-2007 Sun Microsystems, Inc. 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 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/_javaClasses.cpp.incl" 27 28 // Helpful macro for computing field offsets at run time rather than hardcoding them 29 #define COMPUTE_OFFSET(klass_name_as_C_str, dest_offset, klass_oop, name_symbol, signature_symbol) \ 30 { \ 31 fieldDescriptor fd; \ 32 instanceKlass* ik = instanceKlass::cast(klass_oop); \ 33 if (!ik->find_local_field(name_symbol, signature_symbol, &fd)) { \ 34 fatal("Invalid layout of " klass_name_as_C_str); \ 35 } \ 36 dest_offset = fd.offset(); \ 37 } 38 39 // Same as above but for "optional" offsets that might not be present in certain JDK versions 40 #define COMPUTE_OPTIONAL_OFFSET(klass_name_as_C_str, dest_offset, klass_oop, name_symbol, signature_symbol) \ 41 { \ 42 fieldDescriptor fd; \ 43 instanceKlass* ik = instanceKlass::cast(klass_oop); \ 44 if (ik->find_local_field(name_symbol, signature_symbol, &fd)) { \ 45 dest_offset = fd.offset(); \ 46 } \ 47 } 48 49 Handle java_lang_String::basic_create(int length, bool tenured, TRAPS) { 50 // Create the String object first, so there's a chance that the String 51 // and the char array it points to end up in the same cache line. 52 oop obj; 53 if (tenured) { 54 obj = instanceKlass::cast(SystemDictionary::string_klass())->allocate_permanent_instance(CHECK_NH); 55 } else { 56 obj = instanceKlass::cast(SystemDictionary::string_klass())->allocate_instance(CHECK_NH); 57 } 58 59 // Create the char array. The String object must be handlized here 60 // because GC can happen as a result of the allocation attempt. 61 Handle h_obj(THREAD, obj); 62 typeArrayOop buffer; 63 if (tenured) { 64 buffer = oopFactory::new_permanent_charArray(length, CHECK_NH); 65 } else { 66 buffer = oopFactory::new_charArray(length, CHECK_NH); 67 } 68 69 // Point the String at the char array 70 obj = h_obj(); 71 set_value(obj, buffer); 72 // No need to zero the offset, allocation zero'ed the entire String object 73 assert(offset(obj) == 0, "initial String offset should be zero"); 74 //set_offset(obj, 0); 75 set_count(obj, length); 76 77 return h_obj; 78 } 79 80 Handle java_lang_String::basic_create_from_unicode(jchar* unicode, int length, bool tenured, TRAPS) { 81 Handle h_obj = basic_create(length, tenured, CHECK_NH); 82 typeArrayOop buffer = value(h_obj()); 83 for (int index = 0; index < length; index++) { 84 buffer->char_at_put(index, unicode[index]); 85 } 86 return h_obj; 87 } 88 89 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) { 90 return basic_create_from_unicode(unicode, length, false, CHECK_NH); 91 } 92 93 Handle java_lang_String::create_tenured_from_unicode(jchar* unicode, int length, TRAPS) { 94 return basic_create_from_unicode(unicode, length, true, CHECK_NH); 95 } 96 97 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) { 98 Handle h_obj = basic_create_from_unicode(unicode, length, false, CHECK_0); 99 return h_obj(); 100 } 101 102 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) { 103 if (utf8_str == NULL) { 104 return Handle(); 105 } 106 int length = UTF8::unicode_length(utf8_str); 107 Handle h_obj = basic_create(length, false, CHECK_NH); 108 if (length > 0) { 109 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 110 } 111 return h_obj; 112 } 113 114 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) { 115 Handle h_obj = create_from_str(utf8_str, CHECK_0); 116 return h_obj(); 117 } 118 119 Handle java_lang_String::create_from_symbol(symbolHandle symbol, TRAPS) { 120 int length = UTF8::unicode_length((char*)symbol->bytes(), symbol->utf8_length()); 121 Handle h_obj = basic_create(length, false, CHECK_NH); 122 if (length > 0) { 123 UTF8::convert_to_unicode((char*)symbol->bytes(), value(h_obj())->char_at_addr(0), length); 124 } 125 return h_obj; 126 } 127 128 // Converts a C string to a Java String based on current encoding 129 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) { 130 assert(str != NULL, "bad arguments"); 131 132 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *); 133 static to_java_string_fn_t _to_java_string_fn = NULL; 134 135 if (_to_java_string_fn == NULL) { 136 void *lib_handle = os::native_java_library(); 137 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, hpi::dll_lookup(lib_handle, "NewStringPlatform")); 138 if (_to_java_string_fn == NULL) { 139 fatal("NewStringPlatform missing"); 140 } 141 } 142 143 jstring js = NULL; 144 { JavaThread* thread = (JavaThread*)THREAD; 145 assert(thread->is_Java_thread(), "must be java thread"); 146 ThreadToNativeFromVM ttn(thread); 147 HandleMark hm(thread); 148 js = (_to_java_string_fn)(thread->jni_environment(), str); 149 } 150 return Handle(THREAD, JNIHandles::resolve(js)); 151 } 152 153 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) { 154 oop obj = java_string(); 155 // Typical usage is to convert all '/' to '.' in string. 156 typeArrayOop value = java_lang_String::value(obj); 157 int offset = java_lang_String::offset(obj); 158 int length = java_lang_String::length(obj); 159 160 // First check if any from_char exist 161 int index; // Declared outside, used later 162 for (index = 0; index < length; index++) { 163 if (value->char_at(index + offset) == from_char) { 164 break; 165 } 166 } 167 if (index == length) { 168 // No from_char, so do not copy. 169 return java_string; 170 } 171 172 // Create new UNICODE buffer. Must handlize value because GC 173 // may happen during String and char array creation. 174 typeArrayHandle h_value(THREAD, value); 175 Handle string = basic_create(length, false, CHECK_NH); 176 177 typeArrayOop from_buffer = h_value(); 178 typeArrayOop to_buffer = java_lang_String::value(string()); 179 180 // Copy contents 181 for (index = 0; index < length; index++) { 182 jchar c = from_buffer->char_at(index + offset); 183 if (c == from_char) { 184 c = to_char; 185 } 186 to_buffer->char_at_put(index, c); 187 } 188 return string; 189 } 190 191 jchar* java_lang_String::as_unicode_string(oop java_string, int& length) { 192 typeArrayOop value = java_lang_String::value(java_string); 193 int offset = java_lang_String::offset(java_string); 194 length = java_lang_String::length(java_string); 195 196 jchar* result = NEW_RESOURCE_ARRAY(jchar, length); 197 for (int index = 0; index < length; index++) { 198 result[index] = value->char_at(index + offset); 199 } 200 return result; 201 } 202 203 symbolHandle java_lang_String::as_symbol(Handle java_string, TRAPS) { 204 oop obj = java_string(); 205 typeArrayOop value = java_lang_String::value(obj); 206 int offset = java_lang_String::offset(obj); 207 int length = java_lang_String::length(obj); 208 209 ResourceMark rm(THREAD); 210 symbolHandle result; 211 212 if (length > 0) { 213 int utf8_length = UNICODE::utf8_length(value->char_at_addr(offset), length); 214 char* chars = NEW_RESOURCE_ARRAY(char, utf8_length + 1); 215 UNICODE::convert_to_utf8(value->char_at_addr(offset), length, chars); 216 // Allocate the symbol 217 result = oopFactory::new_symbol_handle(chars, utf8_length, CHECK_(symbolHandle())); 218 } else { 219 result = oopFactory::new_symbol_handle("", 0, CHECK_(symbolHandle())); 220 } 221 return result; 222 } 223 224 int java_lang_String::utf8_length(oop java_string) { 225 typeArrayOop value = java_lang_String::value(java_string); 226 int offset = java_lang_String::offset(java_string); 227 int length = java_lang_String::length(java_string); 228 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset); 229 return UNICODE::utf8_length(position, length); 230 } 231 232 char* java_lang_String::as_utf8_string(oop java_string) { 233 typeArrayOop value = java_lang_String::value(java_string); 234 int offset = java_lang_String::offset(java_string); 235 int length = java_lang_String::length(java_string); 236 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset); 237 return UNICODE::as_utf8(position, length); 238 } 239 240 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) { 241 typeArrayOop value = java_lang_String::value(java_string); 242 int offset = java_lang_String::offset(java_string); 243 int length = java_lang_String::length(java_string); 244 assert(start + len <= length, "just checking"); 245 jchar* position = value->char_at_addr(offset + start); 246 return UNICODE::as_utf8(position, len); 247 } 248 249 bool java_lang_String::equals(oop java_string, jchar* chars, int len) { 250 assert(SharedSkipVerify || 251 java_string->klass() == SystemDictionary::string_klass(), 252 "must be java_string"); 253 typeArrayOop value = java_lang_String::value(java_string); 254 int offset = java_lang_String::offset(java_string); 255 int length = java_lang_String::length(java_string); 256 if (length != len) { 257 return false; 258 } 259 for (int i = 0; i < len; i++) { 260 if (value->char_at(i + offset) != chars[i]) { 261 return false; 262 } 263 } 264 return true; 265 } 266 267 void java_lang_String::print(Handle java_string, outputStream* st) { 268 oop obj = java_string(); 269 assert(obj->klass() == SystemDictionary::string_klass(), "must be java_string"); 270 typeArrayOop value = java_lang_String::value(obj); 271 int offset = java_lang_String::offset(obj); 272 int length = java_lang_String::length(obj); 273 274 int end = MIN2(length, 100); 275 if (value == NULL) { 276 // This can happen if, e.g., printing a String 277 // object before its initializer has been called 278 st->print_cr("NULL"); 279 } else { 280 st->print("\""); 281 for (int index = 0; index < length; index++) { 282 st->print("%c", value->char_at(index + offset)); 283 } 284 st->print("\""); 285 } 286 } 287 288 289 oop java_lang_Class::create_mirror(KlassHandle k, TRAPS) { 290 assert(k->java_mirror() == NULL, "should only assign mirror once"); 291 // Use this moment of initialization to cache modifier_flags also, 292 // to support Class.getModifiers(). Instance classes recalculate 293 // the cached flags after the class file is parsed, but before the 294 // class is put into the system dictionary. 295 int computed_modifiers = k->compute_modifier_flags(CHECK_0); 296 k->set_modifier_flags(computed_modifiers); 297 if (SystemDictionary::class_klass_loaded()) { 298 // Allocate mirror (java.lang.Class instance) 299 Handle mirror = instanceKlass::cast(SystemDictionary::class_klass())->allocate_permanent_instance(CHECK_0); 300 // Setup indirections 301 mirror->obj_field_put(klass_offset, k()); 302 k->set_java_mirror(mirror()); 303 // It might also have a component mirror. This mirror must already exist. 304 if (k->oop_is_javaArray()) { 305 Handle comp_mirror; 306 if (k->oop_is_typeArray()) { 307 BasicType type = typeArrayKlass::cast(k->as_klassOop())->element_type(); 308 comp_mirror = Universe::java_mirror(type); 309 assert(comp_mirror.not_null(), "must have primitive mirror"); 310 } else if (k->oop_is_objArray()) { 311 klassOop element_klass = objArrayKlass::cast(k->as_klassOop())->element_klass(); 312 if (element_klass != NULL 313 && (Klass::cast(element_klass)->oop_is_instance() || 314 Klass::cast(element_klass)->oop_is_javaArray())) { 315 comp_mirror = Klass::cast(element_klass)->java_mirror(); 316 assert(comp_mirror.not_null(), "must have element mirror"); 317 } 318 // else some object array internal to the VM, like systemObjArrayKlassObj 319 } 320 if (comp_mirror.not_null()) { 321 // Two-way link between the array klass and its component mirror: 322 arrayKlass::cast(k->as_klassOop())->set_component_mirror(comp_mirror()); 323 set_array_klass(comp_mirror(), k->as_klassOop()); 324 } 325 } 326 return mirror(); 327 } else { 328 return NULL; 329 } 330 } 331 332 333 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) { 334 // This should be improved by adding a field at the Java level or by 335 // introducing a new VM klass (see comment in ClassFileParser) 336 oop java_class = instanceKlass::cast(SystemDictionary::class_klass())->allocate_permanent_instance(CHECK_0); 337 if (type != T_VOID) { 338 klassOop aklass = Universe::typeArrayKlassObj(type); 339 assert(aklass != NULL, "correct bootstrap"); 340 set_array_klass(java_class, aklass); 341 } 342 return java_class; 343 } 344 345 346 klassOop java_lang_Class::as_klassOop(oop java_class) { 347 //%note memory_2 348 klassOop k = klassOop(java_class->obj_field(klass_offset)); 349 assert(k == NULL || k->is_klass(), "type check"); 350 return k; 351 } 352 353 354 klassOop java_lang_Class::array_klass(oop java_class) { 355 klassOop k = klassOop(java_class->obj_field(array_klass_offset)); 356 assert(k == NULL || k->is_klass() && Klass::cast(k)->oop_is_javaArray(), "should be array klass"); 357 return k; 358 } 359 360 361 void java_lang_Class::set_array_klass(oop java_class, klassOop klass) { 362 assert(klass->is_klass() && Klass::cast(klass)->oop_is_javaArray(), "should be array klass"); 363 java_class->obj_field_put(array_klass_offset, klass); 364 } 365 366 367 methodOop java_lang_Class::resolved_constructor(oop java_class) { 368 oop constructor = java_class->obj_field(resolved_constructor_offset); 369 assert(constructor == NULL || constructor->is_method(), "should be method"); 370 return methodOop(constructor); 371 } 372 373 374 void java_lang_Class::set_resolved_constructor(oop java_class, methodOop constructor) { 375 assert(constructor->is_method(), "should be method"); 376 java_class->obj_field_put(resolved_constructor_offset, constructor); 377 } 378 379 380 bool java_lang_Class::is_primitive(oop java_class) { 381 klassOop k = klassOop(java_class->obj_field(klass_offset)); 382 return k == NULL; 383 } 384 385 386 BasicType java_lang_Class::primitive_type(oop java_class) { 387 assert(java_lang_Class::is_primitive(java_class), "just checking"); 388 klassOop ak = klassOop(java_class->obj_field(array_klass_offset)); 389 BasicType type = T_VOID; 390 if (ak != NULL) { 391 // Note: create_basic_type_mirror above initializes ak to a non-null value. 392 type = arrayKlass::cast(ak)->element_type(); 393 } else { 394 assert(java_class == Universe::void_mirror(), "only valid non-array primitive"); 395 } 396 assert(Universe::java_mirror(type) == java_class, "must be consistent"); 397 return type; 398 } 399 400 401 oop java_lang_Class::primitive_mirror(BasicType t) { 402 oop mirror = Universe::java_mirror(t); 403 assert(mirror != NULL && mirror->is_a(SystemDictionary::class_klass()), "must be a Class"); 404 assert(java_lang_Class::is_primitive(mirror), "must be primitive"); 405 return mirror; 406 } 407 408 bool java_lang_Class::offsets_computed = false; 409 int java_lang_Class::classRedefinedCount_offset = -1; 410 411 void java_lang_Class::compute_offsets() { 412 assert(!offsets_computed, "offsets should be initialized only once"); 413 offsets_computed = true; 414 415 klassOop k = SystemDictionary::class_klass(); 416 // The classRedefinedCount field is only present starting in 1.5, 417 // so don't go fatal. 418 COMPUTE_OPTIONAL_OFFSET("java.lang.Class", classRedefinedCount_offset, 419 k, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature()); 420 } 421 422 int java_lang_Class::classRedefinedCount(oop the_class_mirror) { 423 if (!JDK_Version::is_gte_jdk15x_version() 424 || classRedefinedCount_offset == -1) { 425 // The classRedefinedCount field is only present starting in 1.5. 426 // If we don't have an offset for it then just return -1 as a marker. 427 return -1; 428 } 429 430 return the_class_mirror->int_field(classRedefinedCount_offset); 431 } 432 433 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) { 434 if (!JDK_Version::is_gte_jdk15x_version() 435 || classRedefinedCount_offset == -1) { 436 // The classRedefinedCount field is only present starting in 1.5. 437 // If we don't have an offset for it then nothing to set. 438 return; 439 } 440 441 the_class_mirror->int_field_put(classRedefinedCount_offset, value); 442 } 443 444 445 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the 446 // platform thread structure, and a eetop offset which was used for thread 447 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures 448 // merged, so in the HotSpot VM we just use the eetop field for the thread 449 // instead of the privateInfo_offset. 450 // 451 // Note: The stackSize field is only present starting in 1.4. 452 453 int java_lang_Thread::_name_offset = 0; 454 int java_lang_Thread::_group_offset = 0; 455 int java_lang_Thread::_contextClassLoader_offset = 0; 456 int java_lang_Thread::_inheritedAccessControlContext_offset = 0; 457 int java_lang_Thread::_priority_offset = 0; 458 int java_lang_Thread::_eetop_offset = 0; 459 int java_lang_Thread::_daemon_offset = 0; 460 int java_lang_Thread::_stillborn_offset = 0; 461 int java_lang_Thread::_stackSize_offset = 0; 462 int java_lang_Thread::_tid_offset = 0; 463 int java_lang_Thread::_thread_status_offset = 0; 464 int java_lang_Thread::_park_blocker_offset = 0; 465 int java_lang_Thread::_park_event_offset = 0 ; 466 467 468 void java_lang_Thread::compute_offsets() { 469 assert(_group_offset == 0, "offsets should be initialized only once"); 470 471 klassOop k = SystemDictionary::thread_klass(); 472 COMPUTE_OFFSET("java.lang.Thread", _name_offset, k, vmSymbols::name_name(), vmSymbols::char_array_signature()); 473 COMPUTE_OFFSET("java.lang.Thread", _group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature()); 474 COMPUTE_OFFSET("java.lang.Thread", _contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature()); 475 COMPUTE_OFFSET("java.lang.Thread", _inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature()); 476 COMPUTE_OFFSET("java.lang.Thread", _priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature()); 477 COMPUTE_OFFSET("java.lang.Thread", _daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature()); 478 COMPUTE_OFFSET("java.lang.Thread", _eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature()); 479 COMPUTE_OFFSET("java.lang.Thread", _stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature()); 480 // The stackSize field is only present starting in 1.4, so don't go fatal. 481 COMPUTE_OPTIONAL_OFFSET("java.lang.Thread", _stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature()); 482 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal. 483 COMPUTE_OPTIONAL_OFFSET("java.lang.Thread", _tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature()); 484 COMPUTE_OPTIONAL_OFFSET("java.lang.Thread", _thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature()); 485 // The parkBlocker field is only present starting in 1.6, so don't go fatal. 486 COMPUTE_OPTIONAL_OFFSET("java.lang.Thread", _park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature()); 487 COMPUTE_OPTIONAL_OFFSET("java.lang.Thread", _park_event_offset, k, vmSymbols::park_event_name(), 488 vmSymbols::long_signature()); 489 } 490 491 492 JavaThread* java_lang_Thread::thread(oop java_thread) { 493 return (JavaThread*) java_thread->obj_field(_eetop_offset); 494 } 495 496 497 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) { 498 // We are storing a JavaThread* (malloc'ed data) into a long field in the thread 499 // object. The store has to be 64-bit wide so we use a pointer store, but we 500 // cannot call oopDesc::obj_field_put since it includes a write barrier! 501 oop* addr = java_thread->obj_field_addr(_eetop_offset); 502 *addr = (oop) thread; 503 } 504 505 506 typeArrayOop java_lang_Thread::name(oop java_thread) { 507 oop name = java_thread->obj_field(_name_offset); 508 assert(name == NULL || (name->is_typeArray() && typeArrayKlass::cast(name->klass())->element_type() == T_CHAR), "just checking"); 509 return typeArrayOop(name); 510 } 511 512 513 void java_lang_Thread::set_name(oop java_thread, typeArrayOop name) { 514 assert(java_thread->obj_field(_name_offset) == NULL, "name should be NULL"); 515 java_thread->obj_field_put(_name_offset, name); 516 } 517 518 519 ThreadPriority java_lang_Thread::priority(oop java_thread) { 520 return (ThreadPriority)java_thread->int_field(_priority_offset); 521 } 522 523 524 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) { 525 java_thread->int_field_put(_priority_offset, priority); 526 } 527 528 529 oop java_lang_Thread::threadGroup(oop java_thread) { 530 return java_thread->obj_field(_group_offset); 531 } 532 533 534 bool java_lang_Thread::is_stillborn(oop java_thread) { 535 return java_thread->bool_field(_stillborn_offset) != 0; 536 } 537 538 539 // We never have reason to turn the stillborn bit off 540 void java_lang_Thread::set_stillborn(oop java_thread) { 541 java_thread->bool_field_put(_stillborn_offset, true); 542 } 543 544 545 bool java_lang_Thread::is_alive(oop java_thread) { 546 JavaThread* thr = java_lang_Thread::thread(java_thread); 547 return (thr != NULL); 548 } 549 550 551 bool java_lang_Thread::is_daemon(oop java_thread) { 552 return java_thread->bool_field(_daemon_offset) != 0; 553 } 554 555 556 void java_lang_Thread::set_daemon(oop java_thread) { 557 java_thread->bool_field_put(_daemon_offset, true); 558 } 559 560 oop java_lang_Thread::context_class_loader(oop java_thread) { 561 return java_thread->obj_field(_contextClassLoader_offset); 562 } 563 564 oop java_lang_Thread::inherited_access_control_context(oop java_thread) { 565 return java_thread->obj_field(_inheritedAccessControlContext_offset); 566 } 567 568 569 jlong java_lang_Thread::stackSize(oop java_thread) { 570 // The stackSize field is only present starting in 1.4 571 if (_stackSize_offset > 0) { 572 assert(JDK_Version::is_gte_jdk14x_version(), "sanity check"); 573 return java_thread->long_field(_stackSize_offset); 574 } else { 575 return 0; 576 } 577 } 578 579 // Write the thread status value to threadStatus field in java.lang.Thread java class. 580 void java_lang_Thread::set_thread_status(oop java_thread, 581 java_lang_Thread::ThreadStatus status) { 582 assert(JavaThread::current()->thread_state() == _thread_in_vm, "Java Thread is not running in vm"); 583 // The threadStatus is only present starting in 1.5 584 if (_thread_status_offset > 0) { 585 java_thread->int_field_put(_thread_status_offset, status); 586 } 587 } 588 589 // Read thread status value from threadStatus field in java.lang.Thread java class. 590 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) { 591 assert(Thread::current()->is_VM_thread() || 592 JavaThread::current()->thread_state() == _thread_in_vm, 593 "Java Thread is not running in vm"); 594 // The threadStatus is only present starting in 1.5 595 if (_thread_status_offset > 0) { 596 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 597 } else { 598 // All we can easily figure out is if it is alive, but that is 599 // enough info for a valid unknown status. 600 // These aren't restricted to valid set ThreadStatus values, so 601 // use JVMTI values and cast. 602 JavaThread* thr = java_lang_Thread::thread(java_thread); 603 if (thr == NULL) { 604 // the thread hasn't run yet or is in the process of exiting 605 return NEW; 606 } 607 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE; 608 } 609 } 610 611 612 jlong java_lang_Thread::thread_id(oop java_thread) { 613 // The thread ID field is only present starting in 1.5 614 if (_tid_offset > 0) { 615 return java_thread->long_field(_tid_offset); 616 } else { 617 return 0; 618 } 619 } 620 621 oop java_lang_Thread::park_blocker(oop java_thread) { 622 assert(JDK_Version::supports_thread_park_blocker() && _park_blocker_offset != 0, 623 "Must support parkBlocker field"); 624 625 if (_park_blocker_offset > 0) { 626 return java_thread->obj_field(_park_blocker_offset); 627 } 628 629 return NULL; 630 } 631 632 jlong java_lang_Thread::park_event(oop java_thread) { 633 if (_park_event_offset > 0) { 634 return java_thread->long_field(_park_event_offset); 635 } 636 return 0; 637 } 638 639 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) { 640 if (_park_event_offset > 0) { 641 java_thread->long_field_put(_park_event_offset, ptr); 642 return true; 643 } 644 return false; 645 } 646 647 648 const char* java_lang_Thread::thread_status_name(oop java_thread) { 649 assert(JDK_Version::is_gte_jdk15x_version() && _thread_status_offset != 0, "Must have thread status"); 650 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 651 switch (status) { 652 case NEW : return "NEW"; 653 case RUNNABLE : return "RUNNABLE"; 654 case SLEEPING : return "TIMED_WAITING (sleeping)"; 655 case IN_OBJECT_WAIT : return "WAITING (on object monitor)"; 656 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)"; 657 case PARKED : return "WAITING (parking)"; 658 case PARKED_TIMED : return "TIMED_WAITING (parking)"; 659 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)"; 660 case TERMINATED : return "TERMINATED"; 661 default : return "UNKNOWN"; 662 }; 663 } 664 int java_lang_ThreadGroup::_parent_offset = 0; 665 int java_lang_ThreadGroup::_name_offset = 0; 666 int java_lang_ThreadGroup::_threads_offset = 0; 667 int java_lang_ThreadGroup::_groups_offset = 0; 668 int java_lang_ThreadGroup::_maxPriority_offset = 0; 669 int java_lang_ThreadGroup::_destroyed_offset = 0; 670 int java_lang_ThreadGroup::_daemon_offset = 0; 671 int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0; 672 int java_lang_ThreadGroup::_nthreads_offset = 0; 673 int java_lang_ThreadGroup::_ngroups_offset = 0; 674 675 oop java_lang_ThreadGroup::parent(oop java_thread_group) { 676 assert(java_thread_group->is_oop(), "thread group must be oop"); 677 return java_thread_group->obj_field(_parent_offset); 678 } 679 680 // ("name as oop" accessor is not necessary) 681 682 typeArrayOop java_lang_ThreadGroup::name(oop java_thread_group) { 683 oop name = java_thread_group->obj_field(_name_offset); 684 // ThreadGroup.name can be null 685 return name == NULL ? (typeArrayOop)NULL : java_lang_String::value(name); 686 } 687 688 int java_lang_ThreadGroup::nthreads(oop java_thread_group) { 689 assert(java_thread_group->is_oop(), "thread group must be oop"); 690 return java_thread_group->int_field(_nthreads_offset); 691 } 692 693 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) { 694 oop threads = java_thread_group->obj_field(_threads_offset); 695 assert(threads != NULL, "threadgroups should have threads"); 696 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code 697 return objArrayOop(threads); 698 } 699 700 int java_lang_ThreadGroup::ngroups(oop java_thread_group) { 701 assert(java_thread_group->is_oop(), "thread group must be oop"); 702 return java_thread_group->int_field(_ngroups_offset); 703 } 704 705 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) { 706 oop groups = java_thread_group->obj_field(_groups_offset); 707 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code 708 return objArrayOop(groups); 709 } 710 711 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) { 712 assert(java_thread_group->is_oop(), "thread group must be oop"); 713 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset); 714 } 715 716 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) { 717 assert(java_thread_group->is_oop(), "thread group must be oop"); 718 return java_thread_group->bool_field(_destroyed_offset) != 0; 719 } 720 721 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) { 722 assert(java_thread_group->is_oop(), "thread group must be oop"); 723 return java_thread_group->bool_field(_daemon_offset) != 0; 724 } 725 726 bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) { 727 assert(java_thread_group->is_oop(), "thread group must be oop"); 728 return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0; 729 } 730 731 void java_lang_ThreadGroup::compute_offsets() { 732 assert(_parent_offset == 0, "offsets should be initialized only once"); 733 734 klassOop k = SystemDictionary::threadGroup_klass(); 735 736 COMPUTE_OFFSET("java.lang.ThreadGroup", _parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature()); 737 COMPUTE_OFFSET("java.lang.ThreadGroup", _name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 738 COMPUTE_OFFSET("java.lang.ThreadGroup", _threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature()); 739 COMPUTE_OFFSET("java.lang.ThreadGroup", _groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature()); 740 COMPUTE_OFFSET("java.lang.ThreadGroup", _maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature()); 741 COMPUTE_OFFSET("java.lang.ThreadGroup", _destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature()); 742 COMPUTE_OFFSET("java.lang.ThreadGroup", _daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature()); 743 COMPUTE_OFFSET("java.lang.ThreadGroup", _vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature()); 744 COMPUTE_OFFSET("java.lang.ThreadGroup", _nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature()); 745 COMPUTE_OFFSET("java.lang.ThreadGroup", _ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature()); 746 } 747 748 oop java_lang_Throwable::backtrace(oop throwable) { 749 return throwable->obj_field_acquire(backtrace_offset); 750 } 751 752 753 void java_lang_Throwable::set_backtrace(oop throwable, oop value) { 754 throwable->release_obj_field_put(backtrace_offset, value); 755 } 756 757 758 oop java_lang_Throwable::message(oop throwable) { 759 return throwable->obj_field(detailMessage_offset); 760 } 761 762 763 oop java_lang_Throwable::message(Handle throwable) { 764 return throwable->obj_field(detailMessage_offset); 765 } 766 767 768 void java_lang_Throwable::set_message(oop throwable, oop value) { 769 throwable->obj_field_put(detailMessage_offset, value); 770 } 771 772 773 void java_lang_Throwable::clear_stacktrace(oop throwable) { 774 assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4"); 775 throwable->obj_field_put(stackTrace_offset, NULL); 776 } 777 778 779 void java_lang_Throwable::print(oop throwable, outputStream* st) { 780 ResourceMark rm; 781 klassOop k = throwable->klass(); 782 assert(k != NULL, "just checking"); 783 st->print("%s", instanceKlass::cast(k)->external_name()); 784 oop msg = message(throwable); 785 if (msg != NULL) { 786 st->print(": %s", java_lang_String::as_utf8_string(msg)); 787 } 788 } 789 790 791 void java_lang_Throwable::print(Handle throwable, outputStream* st) { 792 ResourceMark rm; 793 klassOop k = throwable->klass(); 794 assert(k != NULL, "just checking"); 795 st->print("%s", instanceKlass::cast(k)->external_name()); 796 oop msg = message(throwable); 797 if (msg != NULL) { 798 st->print(": %s", java_lang_String::as_utf8_string(msg)); 799 } 800 } 801 802 // Print stack trace element to resource allocated buffer 803 char* java_lang_Throwable::print_stack_element_to_buffer(methodOop method, int bci) { 804 // Get strings and string lengths 805 instanceKlass* klass = instanceKlass::cast(method->method_holder()); 806 const char* klass_name = klass->external_name(); 807 int buf_len = (int)strlen(klass_name); 808 char* source_file_name; 809 if (klass->source_file_name() == NULL) { 810 source_file_name = NULL; 811 } else { 812 source_file_name = klass->source_file_name()->as_C_string(); 813 buf_len += (int)strlen(source_file_name); 814 } 815 char* method_name = method->name()->as_C_string(); 816 buf_len += (int)strlen(method_name); 817 818 // Allocate temporary buffer with extra space for formatting and line number 819 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64); 820 821 // Print stack trace line in buffer 822 sprintf(buf, "\tat %s.%s", klass_name, method_name); 823 if (method->is_native()) { 824 strcat(buf, "(Native Method)"); 825 } else { 826 int line_number = method->line_number_from_bci(bci); 827 if (source_file_name != NULL && (line_number != -1)) { 828 // Sourcename and linenumber 829 sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number); 830 } else if (source_file_name != NULL) { 831 // Just sourcename 832 sprintf(buf + (int)strlen(buf), "(%s)", source_file_name); 833 } else { 834 // Neither soucename and linenumber 835 sprintf(buf + (int)strlen(buf), "(Unknown Source)"); 836 } 837 nmethod* nm = method->code(); 838 if (WizardMode && nm != NULL) { 839 sprintf(buf + (int)strlen(buf), "(nmethod %#x)", nm); 840 } 841 } 842 843 return buf; 844 } 845 846 847 void java_lang_Throwable::print_stack_element(Handle stream, methodOop method, int bci) { 848 ResourceMark rm; 849 char* buf = print_stack_element_to_buffer(method, bci); 850 print_to_stream(stream, buf); 851 } 852 853 void java_lang_Throwable::print_stack_element(outputStream *st, methodOop method, int bci) { 854 ResourceMark rm; 855 char* buf = print_stack_element_to_buffer(method, bci); 856 st->print_cr("%s", buf); 857 } 858 859 void java_lang_Throwable::print_to_stream(Handle stream, const char* str) { 860 if (stream.is_null()) { 861 tty->print_cr("%s", str); 862 } else { 863 EXCEPTION_MARK; 864 JavaValue result(T_VOID); 865 Handle arg (THREAD, oopFactory::new_charArray(str, THREAD)); 866 if (!HAS_PENDING_EXCEPTION) { 867 JavaCalls::call_virtual(&result, 868 stream, 869 KlassHandle(THREAD, stream->klass()), 870 vmSymbolHandles::println_name(), 871 vmSymbolHandles::char_array_void_signature(), 872 arg, 873 THREAD); 874 } 875 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 876 if (HAS_PENDING_EXCEPTION) CLEAR_PENDING_EXCEPTION; 877 } 878 879 } 880 881 882 const char* java_lang_Throwable::no_stack_trace_message() { 883 return "\t<<no stack trace available>>"; 884 } 885 886 887 // Currently used only for exceptions occurring during startup 888 void java_lang_Throwable::print_stack_trace(oop throwable, outputStream* st) { 889 Thread *THREAD = Thread::current(); 890 Handle h_throwable(THREAD, throwable); 891 while (h_throwable.not_null()) { 892 objArrayHandle result (THREAD, objArrayOop(backtrace(h_throwable()))); 893 if (result.is_null()) { 894 st->print_cr(no_stack_trace_message()); 895 return; 896 } 897 898 while (result.not_null()) { 899 objArrayHandle methods (THREAD, 900 objArrayOop(result->obj_at(trace_methods_offset))); 901 typeArrayHandle bcis (THREAD, 902 typeArrayOop(result->obj_at(trace_bcis_offset))); 903 904 if (methods.is_null() || bcis.is_null()) { 905 st->print_cr(no_stack_trace_message()); 906 return; 907 } 908 909 int length = methods()->length(); 910 for (int index = 0; index < length; index++) { 911 methodOop method = methodOop(methods()->obj_at(index)); 912 if (method == NULL) goto handle_cause; 913 int bci = bcis->ushort_at(index); 914 print_stack_element(st, method, bci); 915 } 916 result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset))); 917 } 918 handle_cause: 919 { 920 EXCEPTION_MARK; 921 JavaValue result(T_OBJECT); 922 JavaCalls::call_virtual(&result, 923 h_throwable, 924 KlassHandle(THREAD, h_throwable->klass()), 925 vmSymbolHandles::getCause_name(), 926 vmSymbolHandles::void_throwable_signature(), 927 THREAD); 928 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 929 if (HAS_PENDING_EXCEPTION) { 930 CLEAR_PENDING_EXCEPTION; 931 h_throwable = Handle(); 932 } else { 933 h_throwable = Handle(THREAD, (oop) result.get_jobject()); 934 if (h_throwable.not_null()) { 935 st->print("Caused by: "); 936 print(h_throwable, st); 937 st->cr(); 938 } 939 } 940 } 941 } 942 } 943 944 945 void java_lang_Throwable::print_stack_trace(oop throwable, oop print_stream) { 946 // Note: this is no longer used in Merlin, but we support it for compatibility. 947 Thread *thread = Thread::current(); 948 Handle stream(thread, print_stream); 949 objArrayHandle result (thread, objArrayOop(backtrace(throwable))); 950 if (result.is_null()) { 951 print_to_stream(stream, no_stack_trace_message()); 952 return; 953 } 954 955 while (result.not_null()) { 956 objArrayHandle methods (thread, 957 objArrayOop(result->obj_at(trace_methods_offset))); 958 typeArrayHandle bcis (thread, 959 typeArrayOop(result->obj_at(trace_bcis_offset))); 960 961 if (methods.is_null() || bcis.is_null()) { 962 print_to_stream(stream, no_stack_trace_message()); 963 return; 964 } 965 966 int length = methods()->length(); 967 for (int index = 0; index < length; index++) { 968 methodOop method = methodOop(methods()->obj_at(index)); 969 if (method == NULL) return; 970 int bci = bcis->ushort_at(index); 971 print_stack_element(stream, method, bci); 972 } 973 result = objArrayHandle(thread, objArrayOop(result->obj_at(trace_next_offset))); 974 } 975 } 976 977 // This class provides a simple wrapper over the internal structure of 978 // exception backtrace to insulate users of the backtrace from needing 979 // to know what it looks like. 980 class BacktraceBuilder: public StackObj { 981 private: 982 Handle _backtrace; 983 objArrayOop _head; 984 objArrayOop _methods; 985 typeArrayOop _bcis; 986 int _index; 987 bool _dirty; 988 bool _done; 989 No_Safepoint_Verifier _nsv; 990 991 public: 992 993 enum { 994 trace_methods_offset = java_lang_Throwable::trace_methods_offset, 995 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset, 996 trace_next_offset = java_lang_Throwable::trace_next_offset, 997 trace_size = java_lang_Throwable::trace_size, 998 trace_chunk_size = java_lang_Throwable::trace_chunk_size 999 }; 1000 1001 // constructor for new backtrace 1002 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL) { 1003 expand(CHECK); 1004 _backtrace = _head; 1005 _index = 0; 1006 _dirty = false; 1007 _done = false; 1008 } 1009 1010 void flush() { 1011 if (_dirty && _methods != NULL) { 1012 BarrierSet* bs = Universe::heap()->barrier_set(); 1013 assert(bs->has_write_ref_array_opt(), "Barrier set must have ref array opt"); 1014 bs->write_ref_array(MemRegion((HeapWord*)_methods->obj_at_addr(0), 1015 _methods->length() * HeapWordsPerOop)); 1016 _dirty = false; 1017 } 1018 } 1019 1020 void expand(TRAPS) { 1021 flush(); 1022 1023 objArrayHandle old_head(THREAD, _head); 1024 Pause_No_Safepoint_Verifier pnsv(&_nsv); 1025 1026 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK); 1027 objArrayHandle new_head(THREAD, head); 1028 1029 objArrayOop methods = oopFactory::new_objectArray(trace_chunk_size, CHECK); 1030 objArrayHandle new_methods(THREAD, methods); 1031 1032 typeArrayOop bcis = oopFactory::new_shortArray(trace_chunk_size, CHECK); 1033 typeArrayHandle new_bcis(THREAD, bcis); 1034 1035 if (!old_head.is_null()) { 1036 old_head->obj_at_put(trace_next_offset, new_head()); 1037 } 1038 new_head->obj_at_put(trace_methods_offset, new_methods()); 1039 new_head->obj_at_put(trace_bcis_offset, new_bcis()); 1040 1041 _head = new_head(); 1042 _methods = new_methods(); 1043 _bcis = new_bcis(); 1044 _index = 0; 1045 } 1046 1047 oop backtrace() { 1048 flush(); 1049 return _backtrace(); 1050 } 1051 1052 inline void push(methodOop method, short bci, TRAPS) { 1053 if (_index >= trace_chunk_size) { 1054 methodHandle mhandle(THREAD, method); 1055 expand(CHECK); 1056 method = mhandle(); 1057 } 1058 1059 // _methods->obj_at_put(_index, method); 1060 *_methods->obj_at_addr(_index) = method; 1061 _bcis->ushort_at_put(_index, bci); 1062 _index++; 1063 _dirty = true; 1064 } 1065 1066 methodOop current_method() { 1067 assert(_index >= 0 && _index < trace_chunk_size, "out of range"); 1068 return methodOop(_methods->obj_at(_index)); 1069 } 1070 1071 jushort current_bci() { 1072 assert(_index >= 0 && _index < trace_chunk_size, "out of range"); 1073 return _bcis->ushort_at(_index); 1074 } 1075 }; 1076 1077 1078 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, TRAPS) { 1079 if (!StackTraceInThrowable) return; 1080 ResourceMark rm(THREAD); 1081 1082 // Start out by clearing the backtrace for this object, in case the VM 1083 // runs out of memory while allocating the stack trace 1084 set_backtrace(throwable(), NULL); 1085 if (JDK_Version::is_gte_jdk14x_version()) { 1086 // New since 1.4, clear lazily constructed Java level stacktrace if 1087 // refilling occurs 1088 clear_stacktrace(throwable()); 1089 } 1090 1091 int max_depth = MaxJavaStackTraceDepth; 1092 JavaThread* thread = (JavaThread*)THREAD; 1093 BacktraceBuilder bt(CHECK); 1094 1095 // Instead of using vframe directly, this version of fill_in_stack_trace 1096 // basically handles everything by hand. This significantly improved the 1097 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows. 1098 // See bug 6333838 for more details. 1099 // The "ASSERT" here is to verify this method generates the exactly same stack 1100 // trace as utilizing vframe. 1101 #ifdef ASSERT 1102 vframeStream st(thread); 1103 methodHandle st_method(THREAD, st.method()); 1104 #endif 1105 int total_count = 0; 1106 RegisterMap map(thread, false); 1107 int decode_offset = 0; 1108 nmethod* nm = NULL; 1109 bool skip_fillInStackTrace_check = false; 1110 bool skip_throwableInit_check = false; 1111 1112 for (frame fr = thread->last_frame(); max_depth != total_count;) { 1113 methodOop method = NULL; 1114 int bci = 0; 1115 1116 // Compiled java method case. 1117 if (decode_offset != 0) { 1118 DebugInfoReadStream stream(nm, decode_offset); 1119 decode_offset = stream.read_int(); 1120 method = (methodOop)nm->oop_at(stream.read_int()); 1121 bci = stream.read_bci(); 1122 } else { 1123 if (fr.is_first_frame()) break; 1124 address pc = fr.pc(); 1125 if (fr.is_interpreted_frame()) { 1126 intptr_t bcx = fr.interpreter_frame_bcx(); 1127 method = fr.interpreter_frame_method(); 1128 bci = fr.is_bci(bcx) ? bcx : method->bci_from((address)bcx); 1129 fr = fr.sender(&map); 1130 } else { 1131 CodeBlob* cb = fr.cb(); 1132 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL 1133 // but non nmethod 1134 fr = fr.sender(&map); 1135 if (cb == NULL || !cb->is_nmethod()) { 1136 continue; 1137 } 1138 nm = (nmethod*)cb; 1139 if (nm->method()->is_native()) { 1140 method = nm->method(); 1141 bci = 0; 1142 } else { 1143 PcDesc* pd = nm->pc_desc_at(pc); 1144 decode_offset = pd->scope_decode_offset(); 1145 // if decode_offset is not equal to 0, it will execute the 1146 // "compiled java method case" at the beginning of the loop. 1147 continue; 1148 } 1149 } 1150 } 1151 #ifdef ASSERT 1152 assert(st_method() == method && st.bci() == bci, 1153 "Wrong stack trace"); 1154 st.next(); 1155 // vframeStream::method isn't GC-safe so store off a copy 1156 // of the methodOop in case we GC. 1157 if (!st.at_end()) { 1158 st_method = st.method(); 1159 } 1160 #endif 1161 if (!skip_fillInStackTrace_check) { 1162 // check "fillInStackTrace" only once, so we negate the flag 1163 // after the first time check. 1164 skip_fillInStackTrace_check = true; 1165 if (method->name() == vmSymbols::fillInStackTrace_name()) { 1166 continue; 1167 } 1168 } 1169 // skip <init> methods of the exceptions klass. If there is <init> methods 1170 // that belongs to a superclass of the exception we are going to skipping 1171 // them in stack trace. This is simlar to classic VM. 1172 if (!skip_throwableInit_check) { 1173 if (method->name() == vmSymbols::object_initializer_name() && 1174 throwable->is_a(method->method_holder())) { 1175 continue; 1176 } else { 1177 // if no "Throwable.init()" method found, we stop checking it next time. 1178 skip_throwableInit_check = true; 1179 } 1180 } 1181 bt.push(method, bci, CHECK); 1182 total_count++; 1183 } 1184 1185 // Put completed stack trace into throwable object 1186 set_backtrace(throwable(), bt.backtrace()); 1187 } 1188 1189 void java_lang_Throwable::fill_in_stack_trace(Handle throwable) { 1190 // No-op if stack trace is disabled 1191 if (!StackTraceInThrowable) { 1192 return; 1193 } 1194 1195 // Disable stack traces for some preallocated out of memory errors 1196 if (!Universe::should_fill_in_stack_trace(throwable)) { 1197 return; 1198 } 1199 1200 PRESERVE_EXCEPTION_MARK; 1201 1202 JavaThread* thread = JavaThread::active(); 1203 fill_in_stack_trace(throwable, thread); 1204 // ignore exceptions thrown during stack trace filling 1205 CLEAR_PENDING_EXCEPTION; 1206 } 1207 1208 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 1209 // Allocate stack trace - backtrace is created but not filled in 1210 1211 // No-op if stack trace is disabled 1212 if (!StackTraceInThrowable) return; 1213 1214 objArrayOop h_oop = oopFactory::new_objectArray(trace_size, CHECK); 1215 objArrayHandle backtrace (THREAD, h_oop); 1216 objArrayOop m_oop = oopFactory::new_objectArray(trace_chunk_size, CHECK); 1217 objArrayHandle methods (THREAD, m_oop); 1218 typeArrayOop b = oopFactory::new_shortArray(trace_chunk_size, CHECK); 1219 typeArrayHandle bcis(THREAD, b); 1220 1221 // backtrace has space for one chunk (next is NULL) 1222 backtrace->obj_at_put(trace_methods_offset, methods()); 1223 backtrace->obj_at_put(trace_bcis_offset, bcis()); 1224 set_backtrace(throwable(), backtrace()); 1225 } 1226 1227 1228 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 1229 // Fill in stack trace into preallocated backtrace (no GC) 1230 1231 // No-op if stack trace is disabled 1232 if (!StackTraceInThrowable) return; 1233 1234 assert(throwable->is_a(SystemDictionary::throwable_klass()), "sanity check"); 1235 1236 oop backtrace = java_lang_Throwable::backtrace(throwable()); 1237 assert(backtrace != NULL, "backtrace not preallocated"); 1238 1239 oop m = objArrayOop(backtrace)->obj_at(trace_methods_offset); 1240 objArrayOop methods = objArrayOop(m); 1241 assert(methods != NULL && methods->length() > 0, "method array not preallocated"); 1242 1243 oop b = objArrayOop(backtrace)->obj_at(trace_bcis_offset); 1244 typeArrayOop bcis = typeArrayOop(b); 1245 assert(bcis != NULL, "bci array not preallocated"); 1246 1247 assert(methods->length() == bcis->length(), "method and bci arrays should match"); 1248 1249 JavaThread* thread = JavaThread::current(); 1250 ResourceMark rm(thread); 1251 vframeStream st(thread); 1252 1253 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 1254 // methods as preallocated errors aren't created by "java" code. 1255 1256 // fill in as much stack trace as possible 1257 int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth); 1258 int chunk_count = 0; 1259 1260 for (;!st.at_end(); st.next()) { 1261 // add element 1262 bcis->ushort_at_put(chunk_count, st.bci()); 1263 methods->obj_at_put(chunk_count, st.method()); 1264 1265 chunk_count++; 1266 1267 // Bail-out for deep stacks 1268 if (chunk_count >= max_chunks) break; 1269 } 1270 } 1271 1272 1273 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) { 1274 if (throwable == NULL) { 1275 THROW_0(vmSymbols::java_lang_NullPointerException()); 1276 } 1277 objArrayOop chunk = objArrayOop(backtrace(throwable)); 1278 int depth = 0; 1279 if (chunk != NULL) { 1280 // Iterate over chunks and count full ones 1281 while (true) { 1282 objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset)); 1283 if (next == NULL) break; 1284 depth += trace_chunk_size; 1285 chunk = next; 1286 } 1287 assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check"); 1288 // Count element in remaining partial chunk 1289 objArrayOop methods = objArrayOop(chunk->obj_at(trace_methods_offset)); 1290 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 1291 assert(methods != NULL && bcis != NULL, "sanity check"); 1292 for (int i = 0; i < methods->length(); i++) { 1293 if (methods->obj_at(i) == NULL) break; 1294 depth++; 1295 } 1296 } 1297 return depth; 1298 } 1299 1300 1301 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) { 1302 if (throwable == NULL) { 1303 THROW_0(vmSymbols::java_lang_NullPointerException()); 1304 } 1305 if (index < 0) { 1306 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 1307 } 1308 // Compute how many chunks to skip and index into actual chunk 1309 objArrayOop chunk = objArrayOop(backtrace(throwable)); 1310 int skip_chunks = index / trace_chunk_size; 1311 int chunk_index = index % trace_chunk_size; 1312 while (chunk != NULL && skip_chunks > 0) { 1313 chunk = objArrayOop(chunk->obj_at(trace_next_offset)); 1314 skip_chunks--; 1315 } 1316 if (chunk == NULL) { 1317 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 1318 } 1319 // Get method,bci from chunk 1320 objArrayOop methods = objArrayOop(chunk->obj_at(trace_methods_offset)); 1321 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 1322 assert(methods != NULL && bcis != NULL, "sanity check"); 1323 methodHandle method(THREAD, methodOop(methods->obj_at(chunk_index))); 1324 int bci = bcis->ushort_at(chunk_index); 1325 // Chunk can be partial full 1326 if (method.is_null()) { 1327 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 1328 } 1329 1330 oop element = java_lang_StackTraceElement::create(method, bci, CHECK_0); 1331 return element; 1332 } 1333 1334 oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) { 1335 // SystemDictionary::stackTraceElement_klass() will be null for pre-1.4 JDKs 1336 assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4"); 1337 1338 // Allocate java.lang.StackTraceElement instance 1339 klassOop k = SystemDictionary::stackTraceElement_klass(); 1340 instanceKlassHandle ik (THREAD, k); 1341 if (ik->should_be_initialized()) { 1342 ik->initialize(CHECK_0); 1343 } 1344 1345 Handle element = ik->allocate_instance_handle(CHECK_0); 1346 // Fill in class name 1347 ResourceMark rm(THREAD); 1348 const char* str = instanceKlass::cast(method->method_holder())->external_name(); 1349 oop classname = StringTable::intern((char*) str, CHECK_0); 1350 java_lang_StackTraceElement::set_declaringClass(element(), classname); 1351 // Fill in method name 1352 oop methodname = StringTable::intern(method->name(), CHECK_0); 1353 java_lang_StackTraceElement::set_methodName(element(), methodname); 1354 // Fill in source file name 1355 symbolOop source = instanceKlass::cast(method->method_holder())->source_file_name(); 1356 oop filename = StringTable::intern(source, CHECK_0); 1357 java_lang_StackTraceElement::set_fileName(element(), filename); 1358 // File in source line number 1359 int line_number; 1360 if (method->is_native()) { 1361 // Negative value different from -1 below, enabling Java code in 1362 // class java.lang.StackTraceElement to distinguish "native" from 1363 // "no LineNumberTable". 1364 line_number = -2; 1365 } else { 1366 // Returns -1 if no LineNumberTable, and otherwise actual line number 1367 line_number = method->line_number_from_bci(bci); 1368 } 1369 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 1370 1371 return element(); 1372 } 1373 1374 1375 void java_lang_reflect_AccessibleObject::compute_offsets() { 1376 klassOop k = SystemDictionary::reflect_accessible_object_klass(); 1377 COMPUTE_OFFSET("java.lang.reflect.AccessibleObject", override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature()); 1378 } 1379 1380 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 1381 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1382 return (jboolean) reflect->bool_field(override_offset); 1383 } 1384 1385 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 1386 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1387 reflect->bool_field_put(override_offset, (int) value); 1388 } 1389 1390 void java_lang_reflect_Method::compute_offsets() { 1391 klassOop k = SystemDictionary::reflect_method_klass(); 1392 COMPUTE_OFFSET("java.lang.reflect.Method", clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 1393 COMPUTE_OFFSET("java.lang.reflect.Method", name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1394 COMPUTE_OFFSET("java.lang.reflect.Method", returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature()); 1395 COMPUTE_OFFSET("java.lang.reflect.Method", parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 1396 COMPUTE_OFFSET("java.lang.reflect.Method", exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 1397 COMPUTE_OFFSET("java.lang.reflect.Method", slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 1398 COMPUTE_OFFSET("java.lang.reflect.Method", modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 1399 // The generic signature and annotations fields are only present in 1.5 1400 signature_offset = -1; 1401 annotations_offset = -1; 1402 parameter_annotations_offset = -1; 1403 annotation_default_offset = -1; 1404 COMPUTE_OPTIONAL_OFFSET("java.lang.reflect.Method", signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 1405 COMPUTE_OPTIONAL_OFFSET("java.lang.reflect.Method", annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 1406 COMPUTE_OPTIONAL_OFFSET("java.lang.reflect.Method", parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 1407 COMPUTE_OPTIONAL_OFFSET("java.lang.reflect.Method", annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature()); 1408 } 1409 1410 Handle java_lang_reflect_Method::create(TRAPS) { 1411 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1412 klassOop klass = SystemDictionary::reflect_method_klass(); 1413 // This class is eagerly initialized during VM initialization, since we keep a refence 1414 // to one of the methods 1415 assert(instanceKlass::cast(klass)->is_initialized(), "must be initialized"); 1416 return instanceKlass::cast(klass)->allocate_instance_handle(CHECK_NH); 1417 } 1418 1419 oop java_lang_reflect_Method::clazz(oop reflect) { 1420 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1421 return reflect->obj_field(clazz_offset); 1422 } 1423 1424 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 1425 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1426 reflect->obj_field_put(clazz_offset, value); 1427 } 1428 1429 int java_lang_reflect_Method::slot(oop reflect) { 1430 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1431 return reflect->int_field(slot_offset); 1432 } 1433 1434 void java_lang_reflect_Method::set_slot(oop reflect, int value) { 1435 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1436 reflect->int_field_put(slot_offset, value); 1437 } 1438 1439 oop java_lang_reflect_Method::name(oop method) { 1440 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1441 return method->obj_field(name_offset); 1442 } 1443 1444 void java_lang_reflect_Method::set_name(oop method, oop value) { 1445 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1446 method->obj_field_put(name_offset, value); 1447 } 1448 1449 oop java_lang_reflect_Method::return_type(oop method) { 1450 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1451 return method->obj_field(returnType_offset); 1452 } 1453 1454 void java_lang_reflect_Method::set_return_type(oop method, oop value) { 1455 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1456 method->obj_field_put(returnType_offset, value); 1457 } 1458 1459 oop java_lang_reflect_Method::parameter_types(oop method) { 1460 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1461 return method->obj_field(parameterTypes_offset); 1462 } 1463 1464 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 1465 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1466 method->obj_field_put(parameterTypes_offset, value); 1467 } 1468 1469 oop java_lang_reflect_Method::exception_types(oop method) { 1470 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1471 return method->obj_field(exceptionTypes_offset); 1472 } 1473 1474 void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 1475 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1476 method->obj_field_put(exceptionTypes_offset, value); 1477 } 1478 1479 int java_lang_reflect_Method::modifiers(oop method) { 1480 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1481 return method->int_field(modifiers_offset); 1482 } 1483 1484 void java_lang_reflect_Method::set_modifiers(oop method, int value) { 1485 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1486 method->int_field_put(modifiers_offset, value); 1487 } 1488 1489 bool java_lang_reflect_Method::has_signature_field() { 1490 return (signature_offset >= 0); 1491 } 1492 1493 oop java_lang_reflect_Method::signature(oop method) { 1494 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1495 assert(has_signature_field(), "signature field must be present"); 1496 return method->obj_field(signature_offset); 1497 } 1498 1499 void java_lang_reflect_Method::set_signature(oop method, oop value) { 1500 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1501 assert(has_signature_field(), "signature field must be present"); 1502 method->obj_field_put(signature_offset, value); 1503 } 1504 1505 bool java_lang_reflect_Method::has_annotations_field() { 1506 return (annotations_offset >= 0); 1507 } 1508 1509 oop java_lang_reflect_Method::annotations(oop method) { 1510 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1511 assert(has_annotations_field(), "annotations field must be present"); 1512 return method->obj_field(annotations_offset); 1513 } 1514 1515 void java_lang_reflect_Method::set_annotations(oop method, oop value) { 1516 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1517 assert(has_annotations_field(), "annotations field must be present"); 1518 method->obj_field_put(annotations_offset, value); 1519 } 1520 1521 bool java_lang_reflect_Method::has_parameter_annotations_field() { 1522 return (parameter_annotations_offset >= 0); 1523 } 1524 1525 oop java_lang_reflect_Method::parameter_annotations(oop method) { 1526 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1527 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 1528 return method->obj_field(parameter_annotations_offset); 1529 } 1530 1531 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 1532 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1533 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 1534 method->obj_field_put(parameter_annotations_offset, value); 1535 } 1536 1537 bool java_lang_reflect_Method::has_annotation_default_field() { 1538 return (annotation_default_offset >= 0); 1539 } 1540 1541 oop java_lang_reflect_Method::annotation_default(oop method) { 1542 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1543 assert(has_annotation_default_field(), "annotation default field must be present"); 1544 return method->obj_field(annotation_default_offset); 1545 } 1546 1547 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 1548 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1549 assert(has_annotation_default_field(), "annotation default field must be present"); 1550 method->obj_field_put(annotation_default_offset, value); 1551 } 1552 1553 void java_lang_reflect_Constructor::compute_offsets() { 1554 klassOop k = SystemDictionary::reflect_constructor_klass(); 1555 COMPUTE_OFFSET("java.lang.reflect.Constructor", clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 1556 COMPUTE_OFFSET("java.lang.reflect.Constructor", parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 1557 COMPUTE_OFFSET("java.lang.reflect.Constructor", exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 1558 COMPUTE_OFFSET("java.lang.reflect.Constructor", slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 1559 COMPUTE_OFFSET("java.lang.reflect.Constructor", modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 1560 // The generic signature and annotations fields are only present in 1.5 1561 signature_offset = -1; 1562 annotations_offset = -1; 1563 parameter_annotations_offset = -1; 1564 COMPUTE_OPTIONAL_OFFSET("java.lang.reflect.Constructor", signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 1565 COMPUTE_OPTIONAL_OFFSET("java.lang.reflect.Constructor", annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 1566 COMPUTE_OPTIONAL_OFFSET("java.lang.reflect.Constructor", parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 1567 } 1568 1569 Handle java_lang_reflect_Constructor::create(TRAPS) { 1570 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1571 symbolHandle name = vmSymbolHandles::java_lang_reflect_Constructor(); 1572 klassOop k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 1573 instanceKlassHandle klass (THREAD, k); 1574 // Ensure it is initialized 1575 klass->initialize(CHECK_NH); 1576 return klass->allocate_instance_handle(CHECK_NH); 1577 } 1578 1579 oop java_lang_reflect_Constructor::clazz(oop reflect) { 1580 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1581 return reflect->obj_field(clazz_offset); 1582 } 1583 1584 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 1585 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1586 reflect->obj_field_put(clazz_offset, value); 1587 } 1588 1589 oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 1590 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1591 return constructor->obj_field(parameterTypes_offset); 1592 } 1593 1594 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 1595 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1596 constructor->obj_field_put(parameterTypes_offset, value); 1597 } 1598 1599 oop java_lang_reflect_Constructor::exception_types(oop constructor) { 1600 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1601 return constructor->obj_field(exceptionTypes_offset); 1602 } 1603 1604 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 1605 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1606 constructor->obj_field_put(exceptionTypes_offset, value); 1607 } 1608 1609 int java_lang_reflect_Constructor::slot(oop reflect) { 1610 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1611 return reflect->int_field(slot_offset); 1612 } 1613 1614 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 1615 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1616 reflect->int_field_put(slot_offset, value); 1617 } 1618 1619 int java_lang_reflect_Constructor::modifiers(oop constructor) { 1620 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1621 return constructor->int_field(modifiers_offset); 1622 } 1623 1624 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 1625 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1626 constructor->int_field_put(modifiers_offset, value); 1627 } 1628 1629 bool java_lang_reflect_Constructor::has_signature_field() { 1630 return (signature_offset >= 0); 1631 } 1632 1633 oop java_lang_reflect_Constructor::signature(oop constructor) { 1634 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1635 assert(has_signature_field(), "signature field must be present"); 1636 return constructor->obj_field(signature_offset); 1637 } 1638 1639 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 1640 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1641 assert(has_signature_field(), "signature field must be present"); 1642 constructor->obj_field_put(signature_offset, value); 1643 } 1644 1645 bool java_lang_reflect_Constructor::has_annotations_field() { 1646 return (annotations_offset >= 0); 1647 } 1648 1649 oop java_lang_reflect_Constructor::annotations(oop constructor) { 1650 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1651 assert(has_annotations_field(), "annotations field must be present"); 1652 return constructor->obj_field(annotations_offset); 1653 } 1654 1655 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 1656 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1657 assert(has_annotations_field(), "annotations field must be present"); 1658 constructor->obj_field_put(annotations_offset, value); 1659 } 1660 1661 bool java_lang_reflect_Constructor::has_parameter_annotations_field() { 1662 return (parameter_annotations_offset >= 0); 1663 } 1664 1665 oop java_lang_reflect_Constructor::parameter_annotations(oop method) { 1666 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1667 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 1668 return method->obj_field(parameter_annotations_offset); 1669 } 1670 1671 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 1672 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1673 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 1674 method->obj_field_put(parameter_annotations_offset, value); 1675 } 1676 1677 void java_lang_reflect_Field::compute_offsets() { 1678 klassOop k = SystemDictionary::reflect_field_klass(); 1679 COMPUTE_OFFSET("java.lang.reflect.Field", clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 1680 COMPUTE_OFFSET("java.lang.reflect.Field", name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1681 COMPUTE_OFFSET("java.lang.reflect.Field", type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature()); 1682 COMPUTE_OFFSET("java.lang.reflect.Field", slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 1683 COMPUTE_OFFSET("java.lang.reflect.Field", modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 1684 // The generic signature and annotations fields are only present in 1.5 1685 signature_offset = -1; 1686 annotations_offset = -1; 1687 COMPUTE_OPTIONAL_OFFSET("java.lang.reflect.Field", signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 1688 COMPUTE_OPTIONAL_OFFSET("java.lang.reflect.Field", annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 1689 } 1690 1691 Handle java_lang_reflect_Field::create(TRAPS) { 1692 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1693 symbolHandle name = vmSymbolHandles::java_lang_reflect_Field(); 1694 klassOop k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 1695 instanceKlassHandle klass (THREAD, k); 1696 // Ensure it is initialized 1697 klass->initialize(CHECK_NH); 1698 return klass->allocate_instance_handle(CHECK_NH); 1699 } 1700 1701 oop java_lang_reflect_Field::clazz(oop reflect) { 1702 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1703 return reflect->obj_field(clazz_offset); 1704 } 1705 1706 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 1707 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1708 reflect->obj_field_put(clazz_offset, value); 1709 } 1710 1711 oop java_lang_reflect_Field::name(oop field) { 1712 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1713 return field->obj_field(name_offset); 1714 } 1715 1716 void java_lang_reflect_Field::set_name(oop field, oop value) { 1717 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1718 field->obj_field_put(name_offset, value); 1719 } 1720 1721 oop java_lang_reflect_Field::type(oop field) { 1722 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1723 return field->obj_field(type_offset); 1724 } 1725 1726 void java_lang_reflect_Field::set_type(oop field, oop value) { 1727 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1728 field->obj_field_put(type_offset, value); 1729 } 1730 1731 int java_lang_reflect_Field::slot(oop reflect) { 1732 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1733 return reflect->int_field(slot_offset); 1734 } 1735 1736 void java_lang_reflect_Field::set_slot(oop reflect, int value) { 1737 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1738 reflect->int_field_put(slot_offset, value); 1739 } 1740 1741 int java_lang_reflect_Field::modifiers(oop field) { 1742 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1743 return field->int_field(modifiers_offset); 1744 } 1745 1746 void java_lang_reflect_Field::set_modifiers(oop field, int value) { 1747 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1748 field->int_field_put(modifiers_offset, value); 1749 } 1750 1751 bool java_lang_reflect_Field::has_signature_field() { 1752 return (signature_offset >= 0); 1753 } 1754 1755 oop java_lang_reflect_Field::signature(oop field) { 1756 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1757 assert(has_signature_field(), "signature field must be present"); 1758 return field->obj_field(signature_offset); 1759 } 1760 1761 void java_lang_reflect_Field::set_signature(oop field, oop value) { 1762 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1763 assert(has_signature_field(), "signature field must be present"); 1764 field->obj_field_put(signature_offset, value); 1765 } 1766 1767 bool java_lang_reflect_Field::has_annotations_field() { 1768 return (annotations_offset >= 0); 1769 } 1770 1771 oop java_lang_reflect_Field::annotations(oop field) { 1772 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1773 assert(has_annotations_field(), "annotations field must be present"); 1774 return field->obj_field(annotations_offset); 1775 } 1776 1777 void java_lang_reflect_Field::set_annotations(oop field, oop value) { 1778 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1779 assert(has_annotations_field(), "annotations field must be present"); 1780 field->obj_field_put(annotations_offset, value); 1781 } 1782 1783 1784 void sun_reflect_ConstantPool::compute_offsets() { 1785 klassOop k = SystemDictionary::reflect_constant_pool_klass(); 1786 // This null test can be removed post beta 1787 if (k != NULL) { 1788 COMPUTE_OFFSET("sun.reflect.ConstantPool", _cp_oop_offset, k, vmSymbols::constantPoolOop_name(), vmSymbols::object_signature()); 1789 } 1790 } 1791 1792 1793 Handle sun_reflect_ConstantPool::create(TRAPS) { 1794 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1795 klassOop k = SystemDictionary::reflect_constant_pool_klass(); 1796 instanceKlassHandle klass (THREAD, k); 1797 // Ensure it is initialized 1798 klass->initialize(CHECK_NH); 1799 return klass->allocate_instance_handle(CHECK_NH); 1800 } 1801 1802 1803 oop sun_reflect_ConstantPool::cp_oop(oop reflect) { 1804 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1805 return reflect->obj_field(_cp_oop_offset); 1806 } 1807 1808 1809 void sun_reflect_ConstantPool::set_cp_oop(oop reflect, oop value) { 1810 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1811 reflect->obj_field_put(_cp_oop_offset, value); 1812 } 1813 1814 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() { 1815 klassOop k = SystemDictionary::reflect_unsafe_static_field_accessor_impl_klass(); 1816 // This null test can be removed post beta 1817 if (k != NULL) { 1818 COMPUTE_OFFSET("sun.reflect.UnsafeStaticFieldAccessorImpl", _base_offset, k, 1819 vmSymbols::base_name(), vmSymbols::object_signature()); 1820 } 1821 } 1822 1823 oop java_lang_boxing_object::initialize_and_allocate(klassOop k, TRAPS) { 1824 instanceKlassHandle h (THREAD, k); 1825 if (!h->is_initialized()) h->initialize(CHECK_0); 1826 return h->allocate_instance(THREAD); 1827 } 1828 1829 1830 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 1831 oop box; 1832 switch (type) { 1833 case T_BOOLEAN: 1834 box = initialize_and_allocate(SystemDictionary::boolean_klass(), CHECK_0); 1835 box->bool_field_put(value_offset, value->z); 1836 break; 1837 case T_CHAR: 1838 box = initialize_and_allocate(SystemDictionary::char_klass(), CHECK_0); 1839 box->char_field_put(value_offset, value->c); 1840 break; 1841 case T_FLOAT: 1842 box = initialize_and_allocate(SystemDictionary::float_klass(), CHECK_0); 1843 box->float_field_put(value_offset, value->f); 1844 break; 1845 case T_DOUBLE: 1846 box = initialize_and_allocate(SystemDictionary::double_klass(), CHECK_0); 1847 box->double_field_put(value_offset, value->d); 1848 break; 1849 case T_BYTE: 1850 box = initialize_and_allocate(SystemDictionary::byte_klass(), CHECK_0); 1851 box->byte_field_put(value_offset, value->b); 1852 break; 1853 case T_SHORT: 1854 box = initialize_and_allocate(SystemDictionary::short_klass(), CHECK_0); 1855 box->short_field_put(value_offset, value->s); 1856 break; 1857 case T_INT: 1858 box = initialize_and_allocate(SystemDictionary::int_klass(), CHECK_0); 1859 box->int_field_put(value_offset, value->i); 1860 break; 1861 case T_LONG: 1862 box = initialize_and_allocate(SystemDictionary::long_klass(), CHECK_0); 1863 box->long_field_put(value_offset, value->j); 1864 break; 1865 default: 1866 return NULL; 1867 } 1868 return box; 1869 } 1870 1871 1872 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 1873 klassOop k = box->klass(); 1874 if (k == SystemDictionary::boolean_klass()) { 1875 value->z = box->bool_field(value_offset); 1876 return T_BOOLEAN; 1877 } 1878 if (k == SystemDictionary::char_klass()) { 1879 value->c = box->char_field(value_offset); 1880 return T_CHAR; 1881 } 1882 if (k == SystemDictionary::float_klass()) { 1883 value->f = box->float_field(value_offset); 1884 return T_FLOAT; 1885 } 1886 if (k == SystemDictionary::double_klass()) { 1887 value->d = box->double_field(value_offset); 1888 return T_DOUBLE; 1889 } 1890 if (k == SystemDictionary::byte_klass()) { 1891 value->b = box->byte_field(value_offset); 1892 return T_BYTE; 1893 } 1894 if (k == SystemDictionary::short_klass()) { 1895 value->s = box->short_field(value_offset); 1896 return T_SHORT; 1897 } 1898 if (k == SystemDictionary::int_klass()) { 1899 value->i = box->int_field(value_offset); 1900 return T_INT; 1901 } 1902 if (k == SystemDictionary::long_klass()) { 1903 value->j = box->long_field(value_offset); 1904 return T_LONG; 1905 } 1906 return T_ILLEGAL; 1907 } 1908 1909 1910 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 1911 klassOop k = box->klass(); 1912 if (k == SystemDictionary::boolean_klass()) { 1913 box->bool_field_put(value_offset, value->z); 1914 return T_BOOLEAN; 1915 } 1916 if (k == SystemDictionary::char_klass()) { 1917 box->char_field_put(value_offset, value->c); 1918 return T_CHAR; 1919 } 1920 if (k == SystemDictionary::float_klass()) { 1921 box->float_field_put(value_offset, value->f); 1922 return T_FLOAT; 1923 } 1924 if (k == SystemDictionary::double_klass()) { 1925 box->double_field_put(value_offset, value->d); 1926 return T_DOUBLE; 1927 } 1928 if (k == SystemDictionary::byte_klass()) { 1929 box->byte_field_put(value_offset, value->b); 1930 return T_BYTE; 1931 } 1932 if (k == SystemDictionary::short_klass()) { 1933 box->short_field_put(value_offset, value->s); 1934 return T_SHORT; 1935 } 1936 if (k == SystemDictionary::int_klass()) { 1937 box->int_field_put(value_offset, value->i); 1938 return T_INT; 1939 } 1940 if (k == SystemDictionary::long_klass()) { 1941 box->long_field_put(value_offset, value->j); 1942 return T_LONG; 1943 } 1944 return T_ILLEGAL; 1945 } 1946 1947 1948 // Support for java_lang_ref_Reference 1949 1950 void java_lang_ref_Reference::set_referent(oop ref, oop value) { 1951 ref->obj_field_put(referent_offset, value); 1952 } 1953 1954 oop* java_lang_ref_Reference::referent_addr(oop ref) { 1955 return ref->obj_field_addr(referent_offset); 1956 } 1957 1958 void java_lang_ref_Reference::set_next(oop ref, oop value) { 1959 ref->obj_field_put(next_offset, value); 1960 } 1961 1962 oop* java_lang_ref_Reference::next_addr(oop ref) { 1963 return ref->obj_field_addr(next_offset); 1964 } 1965 1966 void java_lang_ref_Reference::set_discovered(oop ref, oop value) { 1967 ref->obj_field_put(discovered_offset, value); 1968 } 1969 1970 oop* java_lang_ref_Reference::discovered_addr(oop ref) { 1971 return ref->obj_field_addr(discovered_offset); 1972 } 1973 1974 oop* java_lang_ref_Reference::pending_list_lock_addr() { 1975 instanceKlass* ik = instanceKlass::cast(SystemDictionary::reference_klass()); 1976 return (oop*)(((char *)ik->start_of_static_fields()) + static_lock_offset); 1977 } 1978 1979 oop* java_lang_ref_Reference::pending_list_addr() { 1980 instanceKlass* ik = instanceKlass::cast(SystemDictionary::reference_klass()); 1981 return (oop *)(((char *)ik->start_of_static_fields()) + static_pending_offset); 1982 } 1983 1984 1985 // Support for java_lang_ref_SoftReference 1986 1987 jlong java_lang_ref_SoftReference::timestamp(oop ref) { 1988 return ref->long_field(timestamp_offset); 1989 } 1990 1991 jlong java_lang_ref_SoftReference::clock() { 1992 instanceKlass* ik = instanceKlass::cast(SystemDictionary::soft_reference_klass()); 1993 int offset = ik->offset_of_static_fields() + static_clock_offset; 1994 1995 return SystemDictionary::soft_reference_klass()->long_field(offset); 1996 } 1997 1998 void java_lang_ref_SoftReference::set_clock(jlong value) { 1999 instanceKlass* ik = instanceKlass::cast(SystemDictionary::soft_reference_klass()); 2000 int offset = ik->offset_of_static_fields() + static_clock_offset; 2001 2002 SystemDictionary::soft_reference_klass()->long_field_put(offset, value); 2003 } 2004 2005 2006 // Support for java_security_AccessControlContext 2007 2008 int java_security_AccessControlContext::_context_offset = 0; 2009 int java_security_AccessControlContext::_privilegedContext_offset = 0; 2010 int java_security_AccessControlContext::_isPrivileged_offset = 0; 2011 2012 2013 void java_security_AccessControlContext::compute_offsets() { 2014 assert(_isPrivileged_offset == 0, "offsets should be initialized only once"); 2015 fieldDescriptor fd; 2016 instanceKlass* ik = instanceKlass::cast(SystemDictionary::AccessControlContext_klass()); 2017 2018 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) { 2019 fatal("Invalid layout of java.security.AccessControlContext"); 2020 } 2021 _context_offset = fd.offset(); 2022 2023 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) { 2024 fatal("Invalid layout of java.security.AccessControlContext"); 2025 } 2026 _privilegedContext_offset = fd.offset(); 2027 2028 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) { 2029 fatal("Invalid layout of java.security.AccessControlContext"); 2030 } 2031 _isPrivileged_offset = fd.offset(); 2032 } 2033 2034 2035 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) { 2036 assert(_isPrivileged_offset != 0, "offsets should have been initialized"); 2037 // Ensure klass is initialized 2038 instanceKlass::cast(SystemDictionary::AccessControlContext_klass())->initialize(CHECK_0); 2039 // Allocate result 2040 oop result = instanceKlass::cast(SystemDictionary::AccessControlContext_klass())->allocate_instance(CHECK_0); 2041 // Fill in values 2042 result->obj_field_put(_context_offset, context()); 2043 result->obj_field_put(_privilegedContext_offset, privileged_context()); 2044 result->bool_field_put(_isPrivileged_offset, isPrivileged); 2045 return result; 2046 } 2047 2048 2049 // Support for java_lang_ClassLoader 2050 2051 oop java_lang_ClassLoader::parent(oop loader) { 2052 assert(loader->is_oop(), "loader must be oop"); 2053 return loader->obj_field(parent_offset); 2054 } 2055 2056 2057 bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 2058 // Fix for 4474172; see evaluation for more details 2059 loader = non_reflection_class_loader(loader); 2060 2061 oop cl = SystemDictionary::java_system_loader(); 2062 while(cl != NULL) { 2063 if (cl == loader) return true; 2064 cl = parent(cl); 2065 } 2066 return false; 2067 } 2068 2069 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) { 2070 if (loader != NULL) { 2071 // See whether this is one of the class loaders associated with 2072 // the generated bytecodes for reflection, and if so, "magically" 2073 // delegate to its parent to prevent class loading from occurring 2074 // in places where applications using reflection didn't expect it. 2075 klassOop delegating_cl_class = SystemDictionary::reflect_delegating_classloader_klass(); 2076 // This might be null in non-1.4 JDKs 2077 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) { 2078 return parent(loader); 2079 } 2080 } 2081 return loader; 2082 } 2083 2084 2085 // Support for java_lang_System 2086 2087 void java_lang_System::compute_offsets() { 2088 assert(offset_of_static_fields == 0, "offsets should be initialized only once"); 2089 2090 instanceKlass* ik = instanceKlass::cast(SystemDictionary::system_klass()); 2091 offset_of_static_fields = ik->offset_of_static_fields(); 2092 } 2093 2094 int java_lang_System::in_offset_in_bytes() { 2095 return (offset_of_static_fields + static_in_offset); 2096 } 2097 2098 2099 int java_lang_System::out_offset_in_bytes() { 2100 return (offset_of_static_fields + static_out_offset); 2101 } 2102 2103 2104 int java_lang_System::err_offset_in_bytes() { 2105 return (offset_of_static_fields + static_err_offset); 2106 } 2107 2108 2109 2110 int java_lang_String::value_offset; 2111 int java_lang_String::offset_offset; 2112 int java_lang_String::count_offset; 2113 int java_lang_String::hash_offset; 2114 int java_lang_Class::klass_offset; 2115 int java_lang_Class::array_klass_offset; 2116 int java_lang_Class::resolved_constructor_offset; 2117 int java_lang_Class::number_of_fake_oop_fields; 2118 int java_lang_Throwable::backtrace_offset; 2119 int java_lang_Throwable::detailMessage_offset; 2120 int java_lang_Throwable::cause_offset; 2121 int java_lang_Throwable::stackTrace_offset; 2122 int java_lang_reflect_AccessibleObject::override_offset; 2123 int java_lang_reflect_Method::clazz_offset; 2124 int java_lang_reflect_Method::name_offset; 2125 int java_lang_reflect_Method::returnType_offset; 2126 int java_lang_reflect_Method::parameterTypes_offset; 2127 int java_lang_reflect_Method::exceptionTypes_offset; 2128 int java_lang_reflect_Method::slot_offset; 2129 int java_lang_reflect_Method::modifiers_offset; 2130 int java_lang_reflect_Method::signature_offset; 2131 int java_lang_reflect_Method::annotations_offset; 2132 int java_lang_reflect_Method::parameter_annotations_offset; 2133 int java_lang_reflect_Method::annotation_default_offset; 2134 int java_lang_reflect_Constructor::clazz_offset; 2135 int java_lang_reflect_Constructor::parameterTypes_offset; 2136 int java_lang_reflect_Constructor::exceptionTypes_offset; 2137 int java_lang_reflect_Constructor::slot_offset; 2138 int java_lang_reflect_Constructor::modifiers_offset; 2139 int java_lang_reflect_Constructor::signature_offset; 2140 int java_lang_reflect_Constructor::annotations_offset; 2141 int java_lang_reflect_Constructor::parameter_annotations_offset; 2142 int java_lang_reflect_Field::clazz_offset; 2143 int java_lang_reflect_Field::name_offset; 2144 int java_lang_reflect_Field::type_offset; 2145 int java_lang_reflect_Field::slot_offset; 2146 int java_lang_reflect_Field::modifiers_offset; 2147 int java_lang_reflect_Field::signature_offset; 2148 int java_lang_reflect_Field::annotations_offset; 2149 int java_lang_boxing_object::value_offset; 2150 int java_lang_ref_Reference::referent_offset; 2151 int java_lang_ref_Reference::queue_offset; 2152 int java_lang_ref_Reference::next_offset; 2153 int java_lang_ref_Reference::discovered_offset; 2154 int java_lang_ref_Reference::static_lock_offset; 2155 int java_lang_ref_Reference::static_pending_offset; 2156 int java_lang_ref_Reference::number_of_fake_oop_fields; 2157 int java_lang_ref_SoftReference::timestamp_offset; 2158 int java_lang_ref_SoftReference::static_clock_offset; 2159 int java_lang_ClassLoader::parent_offset; 2160 int java_lang_System::offset_of_static_fields; 2161 int java_lang_System::static_in_offset; 2162 int java_lang_System::static_out_offset; 2163 int java_lang_System::static_err_offset; 2164 int java_lang_StackTraceElement::declaringClass_offset; 2165 int java_lang_StackTraceElement::methodName_offset; 2166 int java_lang_StackTraceElement::fileName_offset; 2167 int java_lang_StackTraceElement::lineNumber_offset; 2168 int java_lang_AssertionStatusDirectives::classes_offset; 2169 int java_lang_AssertionStatusDirectives::classEnabled_offset; 2170 int java_lang_AssertionStatusDirectives::packages_offset; 2171 int java_lang_AssertionStatusDirectives::packageEnabled_offset; 2172 int java_lang_AssertionStatusDirectives::deflt_offset; 2173 int java_nio_Buffer::_limit_offset; 2174 int sun_misc_AtomicLongCSImpl::_value_offset; 2175 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0; 2176 int sun_reflect_ConstantPool::_cp_oop_offset; 2177 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset; 2178 2179 2180 // Support for java_lang_StackTraceElement 2181 2182 void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 2183 element->obj_field_put(fileName_offset, value); 2184 } 2185 2186 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 2187 element->obj_field_put(declaringClass_offset, value); 2188 } 2189 2190 void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 2191 element->obj_field_put(methodName_offset, value); 2192 } 2193 2194 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 2195 element->int_field_put(lineNumber_offset, value); 2196 } 2197 2198 2199 // Support for java Assertions - java_lang_AssertionStatusDirectives. 2200 2201 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 2202 o->obj_field_put(classes_offset, val); 2203 } 2204 2205 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 2206 o->obj_field_put(classEnabled_offset, val); 2207 } 2208 2209 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 2210 o->obj_field_put(packages_offset, val); 2211 } 2212 2213 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 2214 o->obj_field_put(packageEnabled_offset, val); 2215 } 2216 2217 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 2218 o->bool_field_put(deflt_offset, val); 2219 } 2220 2221 2222 // Support for intrinsification of java.nio.Buffer.checkIndex 2223 int java_nio_Buffer::limit_offset() { 2224 return _limit_offset; 2225 } 2226 2227 2228 void java_nio_Buffer::compute_offsets() { 2229 klassOop k = SystemDictionary::java_nio_Buffer_klass(); 2230 COMPUTE_OFFSET("java.nio.Buffer", _limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature()); 2231 } 2232 2233 // Support for intrinsification of sun.misc.AtomicLongCSImpl.attemptUpdate 2234 int sun_misc_AtomicLongCSImpl::value_offset() { 2235 assert(SystemDictionary::sun_misc_AtomicLongCSImpl_klass() != NULL, "can't call this"); 2236 return _value_offset; 2237 } 2238 2239 2240 void sun_misc_AtomicLongCSImpl::compute_offsets() { 2241 klassOop k = SystemDictionary::sun_misc_AtomicLongCSImpl_klass(); 2242 // If this class is not present, its value field offset won't be referenced. 2243 if (k != NULL) { 2244 COMPUTE_OFFSET("sun.misc.AtomicLongCSImpl", _value_offset, k, vmSymbols::value_name(), vmSymbols::long_signature()); 2245 } 2246 } 2247 2248 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) { 2249 if (_owner_offset != 0) return; 2250 2251 assert(JDK_Version::is_gte_jdk16x_version(), "Must be JDK 1.6 or later"); 2252 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK); 2253 klassOop k = SystemDictionary::abstract_ownable_synchronizer_klass(); 2254 COMPUTE_OFFSET("java.util.concurrent.locks.AbstractOwnableSynchronizer", _owner_offset, k, 2255 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature()); 2256 } 2257 2258 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 2259 assert(_owner_offset != 0, "Must be initialized"); 2260 return obj->obj_field(_owner_offset); 2261 } 2262 2263 // Compute hard-coded offsets 2264 // Invoked before SystemDictionary::initialize, so pre-loaded classes 2265 // are not available to determine the offset_of_static_fields. 2266 void JavaClasses::compute_hard_coded_offsets() { 2267 const int x = wordSize; 2268 const int header = instanceOopDesc::header_size_in_bytes(); 2269 2270 // Do the String Class 2271 java_lang_String::value_offset = java_lang_String::hc_value_offset * x + header; 2272 java_lang_String::offset_offset = java_lang_String::hc_offset_offset * x + header; 2273 java_lang_String::count_offset = java_lang_String::offset_offset + sizeof (jint); 2274 java_lang_String::hash_offset = java_lang_String::count_offset + sizeof (jint); 2275 2276 // Do the Class Class 2277 java_lang_Class::klass_offset = java_lang_Class::hc_klass_offset * x + header; 2278 java_lang_Class::array_klass_offset = java_lang_Class::hc_array_klass_offset * x + header; 2279 java_lang_Class::resolved_constructor_offset = java_lang_Class::hc_resolved_constructor_offset * x + header; 2280 2281 // This is NOT an offset 2282 java_lang_Class::number_of_fake_oop_fields = java_lang_Class::hc_number_of_fake_oop_fields; 2283 2284 // Throwable Class 2285 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header; 2286 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header; 2287 java_lang_Throwable::cause_offset = java_lang_Throwable::hc_cause_offset * x + header; 2288 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header; 2289 2290 // java_lang_boxing_object 2291 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset * x + header; 2292 2293 // java_lang_ref_Reference: 2294 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header; 2295 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header; 2296 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header; 2297 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header; 2298 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x; 2299 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x; 2300 // Artificial fields for java_lang_ref_Reference 2301 // The first field is for the discovered field added in 1.4 2302 java_lang_ref_Reference::number_of_fake_oop_fields = 1; 2303 2304 // java_lang_ref_SoftReference Class 2305 java_lang_ref_SoftReference::timestamp_offset = java_lang_ref_SoftReference::hc_timestamp_offset * x + header; 2306 // Don't multiply static fields because they are always in wordSize units 2307 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x; 2308 2309 // java_lang_ClassLoader 2310 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header; 2311 2312 // java_lang_System 2313 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x; 2314 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x; 2315 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x; 2316 2317 // java_lang_StackTraceElement 2318 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header; 2319 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header; 2320 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header; 2321 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header; 2322 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header; 2323 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header; 2324 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header; 2325 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header; 2326 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header; 2327 2328 } 2329 2330 2331 // Compute non-hard-coded field offsets of all the classes in this file 2332 void JavaClasses::compute_offsets() { 2333 2334 java_lang_Class::compute_offsets(); 2335 java_lang_System::compute_offsets(); 2336 java_lang_Thread::compute_offsets(); 2337 java_lang_ThreadGroup::compute_offsets(); 2338 java_security_AccessControlContext::compute_offsets(); 2339 // Initialize reflection classes. The layouts of these classes 2340 // changed with the new reflection implementation in JDK 1.4, and 2341 // since the Universe doesn't know what JDK version it is until this 2342 // point we defer computation of these offsets until now. 2343 java_lang_reflect_AccessibleObject::compute_offsets(); 2344 java_lang_reflect_Method::compute_offsets(); 2345 java_lang_reflect_Constructor::compute_offsets(); 2346 java_lang_reflect_Field::compute_offsets(); 2347 if (JDK_Version::is_gte_jdk14x_version()) { 2348 java_nio_Buffer::compute_offsets(); 2349 } 2350 if (JDK_Version::is_gte_jdk15x_version()) { 2351 sun_reflect_ConstantPool::compute_offsets(); 2352 sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets(); 2353 } 2354 sun_misc_AtomicLongCSImpl::compute_offsets(); 2355 } 2356 2357 #ifndef PRODUCT 2358 2359 // These functions exist to assert the validity of hard-coded field offsets to guard 2360 // against changes in the class files 2361 2362 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 2363 EXCEPTION_MARK; 2364 fieldDescriptor fd; 2365 symbolHandle klass_sym = oopFactory::new_symbol_handle(klass_name, CATCH); 2366 klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 2367 instanceKlassHandle h_klass (THREAD, k); 2368 //instanceKlassHandle h_klass(klass); 2369 symbolHandle f_name = oopFactory::new_symbol_handle(field_name, CATCH); 2370 symbolHandle f_sig = oopFactory::new_symbol_handle(field_sig, CATCH); 2371 if (!h_klass->find_local_field(f_name(), f_sig(), &fd)) { 2372 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 2373 return false; 2374 } 2375 if (fd.is_static()) { 2376 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 2377 return false; 2378 } 2379 if (fd.offset() == hardcoded_offset ) { 2380 return true; 2381 } else { 2382 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.", 2383 klass_name, field_name, hardcoded_offset, fd.offset()); 2384 return false; 2385 } 2386 } 2387 2388 2389 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 2390 EXCEPTION_MARK; 2391 fieldDescriptor fd; 2392 symbolHandle klass_sym = oopFactory::new_symbol_handle(klass_name, CATCH); 2393 klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 2394 instanceKlassHandle h_klass (THREAD, k); 2395 symbolHandle f_name = oopFactory::new_symbol_handle(field_name, CATCH); 2396 symbolHandle f_sig = oopFactory::new_symbol_handle(field_sig, CATCH); 2397 if (!h_klass->find_local_field(f_name(), f_sig(), &fd)) { 2398 tty->print_cr("Static field %s.%s not found", klass_name, field_name); 2399 return false; 2400 } 2401 if (!fd.is_static()) { 2402 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name); 2403 return false; 2404 } 2405 if (fd.offset() == hardcoded_offset + h_klass->offset_of_static_fields()) { 2406 return true; 2407 } else { 2408 tty->print_cr("Offset of static field %s.%s is hardcoded as %d but should really be %d.", klass_name, field_name, hardcoded_offset, fd.offset() - h_klass->offset_of_static_fields()); 2409 return false; 2410 } 2411 } 2412 2413 2414 // Check the hard-coded field offsets of all the classes in this file 2415 2416 void JavaClasses::check_offsets() { 2417 bool valid = true; 2418 2419 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 2420 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig) 2421 2422 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 2423 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig) 2424 2425 // java.lang.String 2426 2427 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C"); 2428 CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I"); 2429 CHECK_OFFSET("java/lang/String", java_lang_String, count, "I"); 2430 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I"); 2431 2432 // java.lang.Class 2433 2434 // Fake fields 2435 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked 2436 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked 2437 // CHECK_OFFSET("java/lang/Class", java_lang_Class, resolved_constructor); // %%% this needs to be checked 2438 2439 // java.lang.Throwable 2440 2441 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;"); 2442 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;"); 2443 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;"); 2444 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;"); 2445 2446 // Boxed primitive objects (java_lang_boxing_object) 2447 2448 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 2449 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 2450 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 2451 CHECK_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 2452 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 2453 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 2454 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 2455 CHECK_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 2456 2457 // java.lang.ClassLoader 2458 2459 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;"); 2460 2461 // java.lang.System 2462 2463 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;"); 2464 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;"); 2465 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;"); 2466 2467 // java.lang.StackTraceElement 2468 2469 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;"); 2470 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;"); 2471 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;"); 2472 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I"); 2473 2474 // java.lang.ref.Reference 2475 2476 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;"); 2477 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;"); 2478 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;"); 2479 // Fake field 2480 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;"); 2481 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;"); 2482 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;"); 2483 2484 // java.lang.ref.SoftReference 2485 2486 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J"); 2487 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J"); 2488 2489 // java.lang.AssertionStatusDirectives 2490 // 2491 // The CheckAssertionStatusDirectives boolean can be removed from here and 2492 // globals.hpp after the AssertionStatusDirectives class has been integrated 2493 // into merlin "for some time." Without it, the vm will fail with early 2494 // merlin builds. 2495 2496 if (CheckAssertionStatusDirectives && JDK_Version::is_gte_jdk14x_version()) { 2497 const char* nm = "java/lang/AssertionStatusDirectives"; 2498 const char* sig = "[Ljava/lang/String;"; 2499 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig); 2500 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z"); 2501 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig); 2502 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z"); 2503 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z"); 2504 } 2505 2506 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed"); 2507 } 2508 2509 #endif // PRODUCT 2510 2511 void javaClasses_init() { 2512 JavaClasses::compute_offsets(); 2513 JavaClasses::check_offsets(); 2514 FilteredFieldsMap::initialize(); // must be done after computing offsets. 2515 } --- EOF ---