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 routine for computing field offsets at run time rather than hardcoding them 29 static void 30 compute_offset(int &dest_offset, 31 klassOop klass_oop, symbolOop name_symbol, symbolOop signature_symbol) { 32 fieldDescriptor fd; 33 instanceKlass* ik = instanceKlass::cast(klass_oop); 34 if (!ik->find_local_field(name_symbol, signature_symbol, &fd)) { 35 ResourceMark rm; 36 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string()); 37 fatal("Invalid layout of preloaded class"); 38 } 39 dest_offset = fd.offset(); 40 } 41 42 // Same as above but for "optional" offsets that might not be present in certain JDK versions 43 static void 44 compute_optional_offset(int& dest_offset, 45 klassOop klass_oop, symbolOop name_symbol, symbolOop signature_symbol) { 46 fieldDescriptor fd; 47 instanceKlass* ik = instanceKlass::cast(klass_oop); 48 if (ik->find_local_field(name_symbol, signature_symbol, &fd)) { 49 dest_offset = fd.offset(); 50 } 51 } 52 53 Handle java_lang_String::basic_create(int length, bool tenured, TRAPS) { 54 // Create the String object first, so there's a chance that the String 55 // and the char array it points to end up in the same cache line. 56 oop obj; 57 if (tenured) { 58 obj = instanceKlass::cast(SystemDictionary::string_klass())->allocate_permanent_instance(CHECK_NH); 59 } else { 60 obj = instanceKlass::cast(SystemDictionary::string_klass())->allocate_instance(CHECK_NH); 61 } 62 63 // Create the char array. The String object must be handlized here 64 // because GC can happen as a result of the allocation attempt. 65 Handle h_obj(THREAD, obj); 66 typeArrayOop buffer; 67 if (tenured) { 68 buffer = oopFactory::new_permanent_charArray(length, CHECK_NH); 69 } else { 70 buffer = oopFactory::new_charArray(length, CHECK_NH); 71 } 72 73 // Point the String at the char array 74 obj = h_obj(); 75 set_value(obj, buffer); 76 // No need to zero the offset, allocation zero'ed the entire String object 77 assert(offset(obj) == 0, "initial String offset should be zero"); 78 //set_offset(obj, 0); 79 set_count(obj, length); 80 81 return h_obj; 82 } 83 84 Handle java_lang_String::basic_create_from_unicode(jchar* unicode, int length, bool tenured, TRAPS) { 85 Handle h_obj = basic_create(length, tenured, CHECK_NH); 86 typeArrayOop buffer = value(h_obj()); 87 for (int index = 0; index < length; index++) { 88 buffer->char_at_put(index, unicode[index]); 89 } 90 return h_obj; 91 } 92 93 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) { 94 return basic_create_from_unicode(unicode, length, false, CHECK_NH); 95 } 96 97 Handle java_lang_String::create_tenured_from_unicode(jchar* unicode, int length, TRAPS) { 98 return basic_create_from_unicode(unicode, length, true, CHECK_NH); 99 } 100 101 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) { 102 Handle h_obj = basic_create_from_unicode(unicode, length, false, CHECK_0); 103 return h_obj(); 104 } 105 106 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) { 107 if (utf8_str == NULL) { 108 return Handle(); 109 } 110 int length = UTF8::unicode_length(utf8_str); 111 Handle h_obj = basic_create(length, false, CHECK_NH); 112 if (length > 0) { 113 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 114 } 115 return h_obj; 116 } 117 118 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) { 119 Handle h_obj = create_from_str(utf8_str, CHECK_0); 120 return h_obj(); 121 } 122 123 Handle java_lang_String::create_from_symbol(symbolHandle symbol, TRAPS) { 124 int length = UTF8::unicode_length((char*)symbol->bytes(), symbol->utf8_length()); 125 Handle h_obj = basic_create(length, false, CHECK_NH); 126 if (length > 0) { 127 UTF8::convert_to_unicode((char*)symbol->bytes(), value(h_obj())->char_at_addr(0), length); 128 } 129 return h_obj; 130 } 131 132 // Converts a C string to a Java String based on current encoding 133 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) { 134 assert(str != NULL, "bad arguments"); 135 136 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *); 137 static to_java_string_fn_t _to_java_string_fn = NULL; 138 139 if (_to_java_string_fn == NULL) { 140 void *lib_handle = os::native_java_library(); 141 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, hpi::dll_lookup(lib_handle, "NewStringPlatform")); 142 if (_to_java_string_fn == NULL) { 143 fatal("NewStringPlatform missing"); 144 } 145 } 146 147 jstring js = NULL; 148 { JavaThread* thread = (JavaThread*)THREAD; 149 assert(thread->is_Java_thread(), "must be java thread"); 150 ThreadToNativeFromVM ttn(thread); 151 HandleMark hm(thread); 152 js = (_to_java_string_fn)(thread->jni_environment(), str); 153 } 154 return Handle(THREAD, JNIHandles::resolve(js)); 155 } 156 157 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) { 158 oop obj = java_string(); 159 // Typical usage is to convert all '/' to '.' in string. 160 typeArrayOop value = java_lang_String::value(obj); 161 int offset = java_lang_String::offset(obj); 162 int length = java_lang_String::length(obj); 163 164 // First check if any from_char exist 165 int index; // Declared outside, used later 166 for (index = 0; index < length; index++) { 167 if (value->char_at(index + offset) == from_char) { 168 break; 169 } 170 } 171 if (index == length) { 172 // No from_char, so do not copy. 173 return java_string; 174 } 175 176 // Create new UNICODE buffer. Must handlize value because GC 177 // may happen during String and char array creation. 178 typeArrayHandle h_value(THREAD, value); 179 Handle string = basic_create(length, false, CHECK_NH); 180 181 typeArrayOop from_buffer = h_value(); 182 typeArrayOop to_buffer = java_lang_String::value(string()); 183 184 // Copy contents 185 for (index = 0; index < length; index++) { 186 jchar c = from_buffer->char_at(index + offset); 187 if (c == from_char) { 188 c = to_char; 189 } 190 to_buffer->char_at_put(index, c); 191 } 192 return string; 193 } 194 195 jchar* java_lang_String::as_unicode_string(oop java_string, int& length) { 196 typeArrayOop value = java_lang_String::value(java_string); 197 int offset = java_lang_String::offset(java_string); 198 length = java_lang_String::length(java_string); 199 200 jchar* result = NEW_RESOURCE_ARRAY(jchar, length); 201 for (int index = 0; index < length; index++) { 202 result[index] = value->char_at(index + offset); 203 } 204 return result; 205 } 206 207 symbolHandle java_lang_String::as_symbol(Handle java_string, TRAPS) { 208 oop obj = java_string(); 209 typeArrayOop value = java_lang_String::value(obj); 210 int offset = java_lang_String::offset(obj); 211 int length = java_lang_String::length(obj); 212 213 ResourceMark rm(THREAD); 214 symbolHandle result; 215 216 if (length > 0) { 217 int utf8_length = UNICODE::utf8_length(value->char_at_addr(offset), length); 218 char* chars = NEW_RESOURCE_ARRAY(char, utf8_length + 1); 219 UNICODE::convert_to_utf8(value->char_at_addr(offset), length, chars); 220 // Allocate the symbol 221 result = oopFactory::new_symbol_handle(chars, utf8_length, CHECK_(symbolHandle())); 222 } else { 223 result = oopFactory::new_symbol_handle("", 0, CHECK_(symbolHandle())); 224 } 225 return result; 226 } 227 228 int java_lang_String::utf8_length(oop java_string) { 229 typeArrayOop value = java_lang_String::value(java_string); 230 int offset = java_lang_String::offset(java_string); 231 int length = java_lang_String::length(java_string); 232 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset); 233 return UNICODE::utf8_length(position, length); 234 } 235 236 char* java_lang_String::as_utf8_string(oop java_string) { 237 typeArrayOop value = java_lang_String::value(java_string); 238 int offset = java_lang_String::offset(java_string); 239 int length = java_lang_String::length(java_string); 240 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset); 241 return UNICODE::as_utf8(position, length); 242 } 243 244 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) { 245 typeArrayOop value = java_lang_String::value(java_string); 246 int offset = java_lang_String::offset(java_string); 247 int length = java_lang_String::length(java_string); 248 assert(start + len <= length, "just checking"); 249 jchar* position = value->char_at_addr(offset + start); 250 return UNICODE::as_utf8(position, len); 251 } 252 253 bool java_lang_String::equals(oop java_string, jchar* chars, int len) { 254 assert(SharedSkipVerify || 255 java_string->klass() == SystemDictionary::string_klass(), 256 "must be java_string"); 257 typeArrayOop value = java_lang_String::value(java_string); 258 int offset = java_lang_String::offset(java_string); 259 int length = java_lang_String::length(java_string); 260 if (length != len) { 261 return false; 262 } 263 for (int i = 0; i < len; i++) { 264 if (value->char_at(i + offset) != chars[i]) { 265 return false; 266 } 267 } 268 return true; 269 } 270 271 void java_lang_String::print(Handle java_string, outputStream* st) { 272 oop obj = java_string(); 273 assert(obj->klass() == SystemDictionary::string_klass(), "must be java_string"); 274 typeArrayOop value = java_lang_String::value(obj); 275 int offset = java_lang_String::offset(obj); 276 int length = java_lang_String::length(obj); 277 278 int end = MIN2(length, 100); 279 if (value == NULL) { 280 // This can happen if, e.g., printing a String 281 // object before its initializer has been called 282 st->print_cr("NULL"); 283 } else { 284 st->print("\""); 285 for (int index = 0; index < length; index++) { 286 st->print("%c", value->char_at(index + offset)); 287 } 288 st->print("\""); 289 } 290 } 291 292 293 oop java_lang_Class::create_mirror(KlassHandle k, TRAPS) { 294 assert(k->java_mirror() == NULL, "should only assign mirror once"); 295 // Use this moment of initialization to cache modifier_flags also, 296 // to support Class.getModifiers(). Instance classes recalculate 297 // the cached flags after the class file is parsed, but before the 298 // class is put into the system dictionary. 299 int computed_modifiers = k->compute_modifier_flags(CHECK_0); 300 k->set_modifier_flags(computed_modifiers); 301 if (SystemDictionary::class_klass_loaded()) { 302 // Allocate mirror (java.lang.Class instance) 303 Handle mirror = instanceKlass::cast(SystemDictionary::class_klass())->allocate_permanent_instance(CHECK_0); 304 // Setup indirections 305 mirror->obj_field_put(klass_offset, k()); 306 k->set_java_mirror(mirror()); 307 // It might also have a component mirror. This mirror must already exist. 308 if (k->oop_is_javaArray()) { 309 Handle comp_mirror; 310 if (k->oop_is_typeArray()) { 311 BasicType type = typeArrayKlass::cast(k->as_klassOop())->element_type(); 312 comp_mirror = Universe::java_mirror(type); 313 assert(comp_mirror.not_null(), "must have primitive mirror"); 314 } else if (k->oop_is_objArray()) { 315 klassOop element_klass = objArrayKlass::cast(k->as_klassOop())->element_klass(); 316 if (element_klass != NULL 317 && (Klass::cast(element_klass)->oop_is_instance() || 318 Klass::cast(element_klass)->oop_is_javaArray())) { 319 comp_mirror = Klass::cast(element_klass)->java_mirror(); 320 assert(comp_mirror.not_null(), "must have element mirror"); 321 } 322 // else some object array internal to the VM, like systemObjArrayKlassObj 323 } 324 if (comp_mirror.not_null()) { 325 // Two-way link between the array klass and its component mirror: 326 arrayKlass::cast(k->as_klassOop())->set_component_mirror(comp_mirror()); 327 set_array_klass(comp_mirror(), k->as_klassOop()); 328 } 329 } 330 return mirror(); 331 } else { 332 return NULL; 333 } 334 } 335 336 337 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) { 338 // This should be improved by adding a field at the Java level or by 339 // introducing a new VM klass (see comment in ClassFileParser) 340 oop java_class = instanceKlass::cast(SystemDictionary::class_klass())->allocate_permanent_instance(CHECK_0); 341 if (type != T_VOID) { 342 klassOop aklass = Universe::typeArrayKlassObj(type); 343 assert(aklass != NULL, "correct bootstrap"); 344 set_array_klass(java_class, aklass); 345 } 346 return java_class; 347 } 348 349 350 klassOop java_lang_Class::as_klassOop(oop java_class) { 351 //%note memory_2 352 klassOop k = klassOop(java_class->obj_field(klass_offset)); 353 assert(k == NULL || k->is_klass(), "type check"); 354 return k; 355 } 356 357 358 klassOop java_lang_Class::array_klass(oop java_class) { 359 klassOop k = klassOop(java_class->obj_field(array_klass_offset)); 360 assert(k == NULL || k->is_klass() && Klass::cast(k)->oop_is_javaArray(), "should be array klass"); 361 return k; 362 } 363 364 365 void java_lang_Class::set_array_klass(oop java_class, klassOop klass) { 366 assert(klass->is_klass() && Klass::cast(klass)->oop_is_javaArray(), "should be array klass"); 367 java_class->obj_field_put(array_klass_offset, klass); 368 } 369 370 371 methodOop java_lang_Class::resolved_constructor(oop java_class) { 372 oop constructor = java_class->obj_field(resolved_constructor_offset); 373 assert(constructor == NULL || constructor->is_method(), "should be method"); 374 return methodOop(constructor); 375 } 376 377 378 void java_lang_Class::set_resolved_constructor(oop java_class, methodOop constructor) { 379 assert(constructor->is_method(), "should be method"); 380 java_class->obj_field_put(resolved_constructor_offset, constructor); 381 } 382 383 384 bool java_lang_Class::is_primitive(oop java_class) { 385 klassOop k = klassOop(java_class->obj_field(klass_offset)); 386 return k == NULL; 387 } 388 389 390 BasicType java_lang_Class::primitive_type(oop java_class) { 391 assert(java_lang_Class::is_primitive(java_class), "just checking"); 392 klassOop ak = klassOop(java_class->obj_field(array_klass_offset)); 393 BasicType type = T_VOID; 394 if (ak != NULL) { 395 // Note: create_basic_type_mirror above initializes ak to a non-null value. 396 type = arrayKlass::cast(ak)->element_type(); 397 } else { 398 assert(java_class == Universe::void_mirror(), "only valid non-array primitive"); 399 } 400 assert(Universe::java_mirror(type) == java_class, "must be consistent"); 401 return type; 402 } 403 404 405 oop java_lang_Class::primitive_mirror(BasicType t) { 406 oop mirror = Universe::java_mirror(t); 407 assert(mirror != NULL && mirror->is_a(SystemDictionary::class_klass()), "must be a Class"); 408 assert(java_lang_Class::is_primitive(mirror), "must be primitive"); 409 return mirror; 410 } 411 412 bool java_lang_Class::offsets_computed = false; 413 int java_lang_Class::classRedefinedCount_offset = -1; 414 415 void java_lang_Class::compute_offsets() { 416 assert(!offsets_computed, "offsets should be initialized only once"); 417 offsets_computed = true; 418 419 klassOop k = SystemDictionary::class_klass(); 420 // The classRedefinedCount field is only present starting in 1.5, 421 // so don't go fatal. 422 compute_optional_offset(classRedefinedCount_offset, 423 k, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature()); 424 } 425 426 int java_lang_Class::classRedefinedCount(oop the_class_mirror) { 427 if (!JDK_Version::is_gte_jdk15x_version() 428 || classRedefinedCount_offset == -1) { 429 // The classRedefinedCount field is only present starting in 1.5. 430 // If we don't have an offset for it then just return -1 as a marker. 431 return -1; 432 } 433 434 return the_class_mirror->int_field(classRedefinedCount_offset); 435 } 436 437 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) { 438 if (!JDK_Version::is_gte_jdk15x_version() 439 || classRedefinedCount_offset == -1) { 440 // The classRedefinedCount field is only present starting in 1.5. 441 // If we don't have an offset for it then nothing to set. 442 return; 443 } 444 445 the_class_mirror->int_field_put(classRedefinedCount_offset, value); 446 } 447 448 449 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the 450 // platform thread structure, and a eetop offset which was used for thread 451 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures 452 // merged, so in the HotSpot VM we just use the eetop field for the thread 453 // instead of the privateInfo_offset. 454 // 455 // Note: The stackSize field is only present starting in 1.4. 456 457 int java_lang_Thread::_name_offset = 0; 458 int java_lang_Thread::_group_offset = 0; 459 int java_lang_Thread::_contextClassLoader_offset = 0; 460 int java_lang_Thread::_inheritedAccessControlContext_offset = 0; 461 int java_lang_Thread::_priority_offset = 0; 462 int java_lang_Thread::_eetop_offset = 0; 463 int java_lang_Thread::_daemon_offset = 0; 464 int java_lang_Thread::_stillborn_offset = 0; 465 int java_lang_Thread::_stackSize_offset = 0; 466 int java_lang_Thread::_tid_offset = 0; 467 int java_lang_Thread::_thread_status_offset = 0; 468 int java_lang_Thread::_park_blocker_offset = 0; 469 int java_lang_Thread::_park_event_offset = 0 ; 470 471 472 void java_lang_Thread::compute_offsets() { 473 assert(_group_offset == 0, "offsets should be initialized only once"); 474 475 klassOop k = SystemDictionary::thread_klass(); 476 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::char_array_signature()); 477 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature()); 478 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature()); 479 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature()); 480 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature()); 481 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature()); 482 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature()); 483 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature()); 484 // The stackSize field is only present starting in 1.4, so don't go fatal. 485 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature()); 486 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal. 487 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature()); 488 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature()); 489 // The parkBlocker field is only present starting in 1.6, so don't go fatal. 490 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature()); 491 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(), 492 vmSymbols::long_signature()); 493 } 494 495 496 JavaThread* java_lang_Thread::thread(oop java_thread) { 497 return (JavaThread*) java_thread->obj_field(_eetop_offset); 498 } 499 500 501 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) { 502 // We are storing a JavaThread* (malloc'ed data) into a long field in the thread 503 // object. The store has to be 64-bit wide so we use a pointer store, but we 504 // cannot call oopDesc::obj_field_put since it includes a write barrier! 505 oop* addr = java_thread->obj_field_addr(_eetop_offset); 506 *addr = (oop) thread; 507 } 508 509 510 typeArrayOop java_lang_Thread::name(oop java_thread) { 511 oop name = java_thread->obj_field(_name_offset); 512 assert(name == NULL || (name->is_typeArray() && typeArrayKlass::cast(name->klass())->element_type() == T_CHAR), "just checking"); 513 return typeArrayOop(name); 514 } 515 516 517 void java_lang_Thread::set_name(oop java_thread, typeArrayOop name) { 518 assert(java_thread->obj_field(_name_offset) == NULL, "name should be NULL"); 519 java_thread->obj_field_put(_name_offset, name); 520 } 521 522 523 ThreadPriority java_lang_Thread::priority(oop java_thread) { 524 return (ThreadPriority)java_thread->int_field(_priority_offset); 525 } 526 527 528 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) { 529 java_thread->int_field_put(_priority_offset, priority); 530 } 531 532 533 oop java_lang_Thread::threadGroup(oop java_thread) { 534 return java_thread->obj_field(_group_offset); 535 } 536 537 538 bool java_lang_Thread::is_stillborn(oop java_thread) { 539 return java_thread->bool_field(_stillborn_offset) != 0; 540 } 541 542 543 // We never have reason to turn the stillborn bit off 544 void java_lang_Thread::set_stillborn(oop java_thread) { 545 java_thread->bool_field_put(_stillborn_offset, true); 546 } 547 548 549 bool java_lang_Thread::is_alive(oop java_thread) { 550 JavaThread* thr = java_lang_Thread::thread(java_thread); 551 return (thr != NULL); 552 } 553 554 555 bool java_lang_Thread::is_daemon(oop java_thread) { 556 return java_thread->bool_field(_daemon_offset) != 0; 557 } 558 559 560 void java_lang_Thread::set_daemon(oop java_thread) { 561 java_thread->bool_field_put(_daemon_offset, true); 562 } 563 564 oop java_lang_Thread::context_class_loader(oop java_thread) { 565 return java_thread->obj_field(_contextClassLoader_offset); 566 } 567 568 oop java_lang_Thread::inherited_access_control_context(oop java_thread) { 569 return java_thread->obj_field(_inheritedAccessControlContext_offset); 570 } 571 572 573 jlong java_lang_Thread::stackSize(oop java_thread) { 574 // The stackSize field is only present starting in 1.4 575 if (_stackSize_offset > 0) { 576 assert(JDK_Version::is_gte_jdk14x_version(), "sanity check"); 577 return java_thread->long_field(_stackSize_offset); 578 } else { 579 return 0; 580 } 581 } 582 583 // Write the thread status value to threadStatus field in java.lang.Thread java class. 584 void java_lang_Thread::set_thread_status(oop java_thread, 585 java_lang_Thread::ThreadStatus status) { 586 assert(JavaThread::current()->thread_state() == _thread_in_vm, "Java Thread is not running in vm"); 587 // The threadStatus is only present starting in 1.5 588 if (_thread_status_offset > 0) { 589 java_thread->int_field_put(_thread_status_offset, status); 590 } 591 } 592 593 // Read thread status value from threadStatus field in java.lang.Thread java class. 594 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) { 595 assert(Thread::current()->is_VM_thread() || 596 JavaThread::current()->thread_state() == _thread_in_vm, 597 "Java Thread is not running in vm"); 598 // The threadStatus is only present starting in 1.5 599 if (_thread_status_offset > 0) { 600 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 601 } else { 602 // All we can easily figure out is if it is alive, but that is 603 // enough info for a valid unknown status. 604 // These aren't restricted to valid set ThreadStatus values, so 605 // use JVMTI values and cast. 606 JavaThread* thr = java_lang_Thread::thread(java_thread); 607 if (thr == NULL) { 608 // the thread hasn't run yet or is in the process of exiting 609 return NEW; 610 } 611 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE; 612 } 613 } 614 615 616 jlong java_lang_Thread::thread_id(oop java_thread) { 617 // The thread ID field is only present starting in 1.5 618 if (_tid_offset > 0) { 619 return java_thread->long_field(_tid_offset); 620 } else { 621 return 0; 622 } 623 } 624 625 oop java_lang_Thread::park_blocker(oop java_thread) { 626 assert(JDK_Version::supports_thread_park_blocker() && _park_blocker_offset != 0, 627 "Must support parkBlocker field"); 628 629 if (_park_blocker_offset > 0) { 630 return java_thread->obj_field(_park_blocker_offset); 631 } 632 633 return NULL; 634 } 635 636 jlong java_lang_Thread::park_event(oop java_thread) { 637 if (_park_event_offset > 0) { 638 return java_thread->long_field(_park_event_offset); 639 } 640 return 0; 641 } 642 643 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) { 644 if (_park_event_offset > 0) { 645 java_thread->long_field_put(_park_event_offset, ptr); 646 return true; 647 } 648 return false; 649 } 650 651 652 const char* java_lang_Thread::thread_status_name(oop java_thread) { 653 assert(JDK_Version::is_gte_jdk15x_version() && _thread_status_offset != 0, "Must have thread status"); 654 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 655 switch (status) { 656 case NEW : return "NEW"; 657 case RUNNABLE : return "RUNNABLE"; 658 case SLEEPING : return "TIMED_WAITING (sleeping)"; 659 case IN_OBJECT_WAIT : return "WAITING (on object monitor)"; 660 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)"; 661 case PARKED : return "WAITING (parking)"; 662 case PARKED_TIMED : return "TIMED_WAITING (parking)"; 663 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)"; 664 case TERMINATED : return "TERMINATED"; 665 default : return "UNKNOWN"; 666 }; 667 } 668 int java_lang_ThreadGroup::_parent_offset = 0; 669 int java_lang_ThreadGroup::_name_offset = 0; 670 int java_lang_ThreadGroup::_threads_offset = 0; 671 int java_lang_ThreadGroup::_groups_offset = 0; 672 int java_lang_ThreadGroup::_maxPriority_offset = 0; 673 int java_lang_ThreadGroup::_destroyed_offset = 0; 674 int java_lang_ThreadGroup::_daemon_offset = 0; 675 int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0; 676 int java_lang_ThreadGroup::_nthreads_offset = 0; 677 int java_lang_ThreadGroup::_ngroups_offset = 0; 678 679 oop java_lang_ThreadGroup::parent(oop java_thread_group) { 680 assert(java_thread_group->is_oop(), "thread group must be oop"); 681 return java_thread_group->obj_field(_parent_offset); 682 } 683 684 // ("name as oop" accessor is not necessary) 685 686 typeArrayOop java_lang_ThreadGroup::name(oop java_thread_group) { 687 oop name = java_thread_group->obj_field(_name_offset); 688 // ThreadGroup.name can be null 689 return name == NULL ? (typeArrayOop)NULL : java_lang_String::value(name); 690 } 691 692 int java_lang_ThreadGroup::nthreads(oop java_thread_group) { 693 assert(java_thread_group->is_oop(), "thread group must be oop"); 694 return java_thread_group->int_field(_nthreads_offset); 695 } 696 697 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) { 698 oop threads = java_thread_group->obj_field(_threads_offset); 699 assert(threads != NULL, "threadgroups should have threads"); 700 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code 701 return objArrayOop(threads); 702 } 703 704 int java_lang_ThreadGroup::ngroups(oop java_thread_group) { 705 assert(java_thread_group->is_oop(), "thread group must be oop"); 706 return java_thread_group->int_field(_ngroups_offset); 707 } 708 709 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) { 710 oop groups = java_thread_group->obj_field(_groups_offset); 711 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code 712 return objArrayOop(groups); 713 } 714 715 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) { 716 assert(java_thread_group->is_oop(), "thread group must be oop"); 717 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset); 718 } 719 720 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) { 721 assert(java_thread_group->is_oop(), "thread group must be oop"); 722 return java_thread_group->bool_field(_destroyed_offset) != 0; 723 } 724 725 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) { 726 assert(java_thread_group->is_oop(), "thread group must be oop"); 727 return java_thread_group->bool_field(_daemon_offset) != 0; 728 } 729 730 bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) { 731 assert(java_thread_group->is_oop(), "thread group must be oop"); 732 return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0; 733 } 734 735 void java_lang_ThreadGroup::compute_offsets() { 736 assert(_parent_offset == 0, "offsets should be initialized only once"); 737 738 klassOop k = SystemDictionary::threadGroup_klass(); 739 740 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature()); 741 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 742 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature()); 743 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature()); 744 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature()); 745 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature()); 746 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature()); 747 compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature()); 748 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature()); 749 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature()); 750 } 751 752 oop java_lang_Throwable::backtrace(oop throwable) { 753 return throwable->obj_field_acquire(backtrace_offset); 754 } 755 756 757 void java_lang_Throwable::set_backtrace(oop throwable, oop value) { 758 throwable->release_obj_field_put(backtrace_offset, value); 759 } 760 761 762 oop java_lang_Throwable::message(oop throwable) { 763 return throwable->obj_field(detailMessage_offset); 764 } 765 766 767 oop java_lang_Throwable::message(Handle throwable) { 768 return throwable->obj_field(detailMessage_offset); 769 } 770 771 772 void java_lang_Throwable::set_message(oop throwable, oop value) { 773 throwable->obj_field_put(detailMessage_offset, value); 774 } 775 776 777 void java_lang_Throwable::clear_stacktrace(oop throwable) { 778 assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4"); 779 throwable->obj_field_put(stackTrace_offset, NULL); 780 } 781 782 783 void java_lang_Throwable::print(oop throwable, outputStream* st) { 784 ResourceMark rm; 785 klassOop k = throwable->klass(); 786 assert(k != NULL, "just checking"); 787 st->print("%s", instanceKlass::cast(k)->external_name()); 788 oop msg = message(throwable); 789 if (msg != NULL) { 790 st->print(": %s", java_lang_String::as_utf8_string(msg)); 791 } 792 } 793 794 795 void java_lang_Throwable::print(Handle throwable, outputStream* st) { 796 ResourceMark rm; 797 klassOop k = throwable->klass(); 798 assert(k != NULL, "just checking"); 799 st->print("%s", instanceKlass::cast(k)->external_name()); 800 oop msg = message(throwable); 801 if (msg != NULL) { 802 st->print(": %s", java_lang_String::as_utf8_string(msg)); 803 } 804 } 805 806 // Print stack trace element to resource allocated buffer 807 char* java_lang_Throwable::print_stack_element_to_buffer(methodOop method, int bci) { 808 // Get strings and string lengths 809 instanceKlass* klass = instanceKlass::cast(method->method_holder()); 810 const char* klass_name = klass->external_name(); 811 int buf_len = (int)strlen(klass_name); 812 char* source_file_name; 813 if (klass->source_file_name() == NULL) { 814 source_file_name = NULL; 815 } else { 816 source_file_name = klass->source_file_name()->as_C_string(); 817 buf_len += (int)strlen(source_file_name); 818 } 819 char* method_name = method->name()->as_C_string(); 820 buf_len += (int)strlen(method_name); 821 822 // Allocate temporary buffer with extra space for formatting and line number 823 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64); 824 825 // Print stack trace line in buffer 826 sprintf(buf, "\tat %s.%s", klass_name, method_name); 827 if (method->is_native()) { 828 strcat(buf, "(Native Method)"); 829 } else { 830 int line_number = method->line_number_from_bci(bci); 831 if (source_file_name != NULL && (line_number != -1)) { 832 // Sourcename and linenumber 833 sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number); 834 } else if (source_file_name != NULL) { 835 // Just sourcename 836 sprintf(buf + (int)strlen(buf), "(%s)", source_file_name); 837 } else { 838 // Neither soucename and linenumber 839 sprintf(buf + (int)strlen(buf), "(Unknown Source)"); 840 } 841 nmethod* nm = method->code(); 842 if (WizardMode && nm != NULL) { 843 sprintf(buf + (int)strlen(buf), "(nmethod %#x)", nm); 844 } 845 } 846 847 return buf; 848 } 849 850 851 void java_lang_Throwable::print_stack_element(Handle stream, methodOop method, int bci) { 852 ResourceMark rm; 853 char* buf = print_stack_element_to_buffer(method, bci); 854 print_to_stream(stream, buf); 855 } 856 857 void java_lang_Throwable::print_stack_element(outputStream *st, methodOop method, int bci) { 858 ResourceMark rm; 859 char* buf = print_stack_element_to_buffer(method, bci); 860 st->print_cr("%s", buf); 861 } 862 863 void java_lang_Throwable::print_to_stream(Handle stream, const char* str) { 864 if (stream.is_null()) { 865 tty->print_cr("%s", str); 866 } else { 867 EXCEPTION_MARK; 868 JavaValue result(T_VOID); 869 Handle arg (THREAD, oopFactory::new_charArray(str, THREAD)); 870 if (!HAS_PENDING_EXCEPTION) { 871 JavaCalls::call_virtual(&result, 872 stream, 873 KlassHandle(THREAD, stream->klass()), 874 vmSymbolHandles::println_name(), 875 vmSymbolHandles::char_array_void_signature(), 876 arg, 877 THREAD); 878 } 879 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 880 if (HAS_PENDING_EXCEPTION) CLEAR_PENDING_EXCEPTION; 881 } 882 883 } 884 885 886 const char* java_lang_Throwable::no_stack_trace_message() { 887 return "\t<<no stack trace available>>"; 888 } 889 890 891 // Currently used only for exceptions occurring during startup 892 void java_lang_Throwable::print_stack_trace(oop throwable, outputStream* st) { 893 Thread *THREAD = Thread::current(); 894 Handle h_throwable(THREAD, throwable); 895 while (h_throwable.not_null()) { 896 objArrayHandle result (THREAD, objArrayOop(backtrace(h_throwable()))); 897 if (result.is_null()) { 898 st->print_cr(no_stack_trace_message()); 899 return; 900 } 901 902 while (result.not_null()) { 903 objArrayHandle methods (THREAD, 904 objArrayOop(result->obj_at(trace_methods_offset))); 905 typeArrayHandle bcis (THREAD, 906 typeArrayOop(result->obj_at(trace_bcis_offset))); 907 908 if (methods.is_null() || bcis.is_null()) { 909 st->print_cr(no_stack_trace_message()); 910 return; 911 } 912 913 int length = methods()->length(); 914 for (int index = 0; index < length; index++) { 915 methodOop method = methodOop(methods()->obj_at(index)); 916 if (method == NULL) goto handle_cause; 917 int bci = bcis->ushort_at(index); 918 print_stack_element(st, method, bci); 919 } 920 result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset))); 921 } 922 handle_cause: 923 { 924 EXCEPTION_MARK; 925 JavaValue result(T_OBJECT); 926 JavaCalls::call_virtual(&result, 927 h_throwable, 928 KlassHandle(THREAD, h_throwable->klass()), 929 vmSymbolHandles::getCause_name(), 930 vmSymbolHandles::void_throwable_signature(), 931 THREAD); 932 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 933 if (HAS_PENDING_EXCEPTION) { 934 CLEAR_PENDING_EXCEPTION; 935 h_throwable = Handle(); 936 } else { 937 h_throwable = Handle(THREAD, (oop) result.get_jobject()); 938 if (h_throwable.not_null()) { 939 st->print("Caused by: "); 940 print(h_throwable, st); 941 st->cr(); 942 } 943 } 944 } 945 } 946 } 947 948 949 void java_lang_Throwable::print_stack_trace(oop throwable, oop print_stream) { 950 // Note: this is no longer used in Merlin, but we support it for compatibility. 951 Thread *thread = Thread::current(); 952 Handle stream(thread, print_stream); 953 objArrayHandle result (thread, objArrayOop(backtrace(throwable))); 954 if (result.is_null()) { 955 print_to_stream(stream, no_stack_trace_message()); 956 return; 957 } 958 959 while (result.not_null()) { 960 objArrayHandle methods (thread, 961 objArrayOop(result->obj_at(trace_methods_offset))); 962 typeArrayHandle bcis (thread, 963 typeArrayOop(result->obj_at(trace_bcis_offset))); 964 965 if (methods.is_null() || bcis.is_null()) { 966 print_to_stream(stream, no_stack_trace_message()); 967 return; 968 } 969 970 int length = methods()->length(); 971 for (int index = 0; index < length; index++) { 972 methodOop method = methodOop(methods()->obj_at(index)); 973 if (method == NULL) return; 974 int bci = bcis->ushort_at(index); 975 print_stack_element(stream, method, bci); 976 } 977 result = objArrayHandle(thread, objArrayOop(result->obj_at(trace_next_offset))); 978 } 979 } 980 981 // This class provides a simple wrapper over the internal structure of 982 // exception backtrace to insulate users of the backtrace from needing 983 // to know what it looks like. 984 class BacktraceBuilder: public StackObj { 985 private: 986 Handle _backtrace; 987 objArrayOop _head; 988 objArrayOop _methods; 989 typeArrayOop _bcis; 990 int _index; 991 bool _dirty; 992 bool _done; 993 No_Safepoint_Verifier _nsv; 994 995 public: 996 997 enum { 998 trace_methods_offset = java_lang_Throwable::trace_methods_offset, 999 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset, 1000 trace_next_offset = java_lang_Throwable::trace_next_offset, 1001 trace_size = java_lang_Throwable::trace_size, 1002 trace_chunk_size = java_lang_Throwable::trace_chunk_size 1003 }; 1004 1005 // constructor for new backtrace 1006 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL) { 1007 expand(CHECK); 1008 _backtrace = _head; 1009 _index = 0; 1010 _dirty = false; 1011 _done = false; 1012 } 1013 1014 void flush() { 1015 if (_dirty && _methods != NULL) { 1016 BarrierSet* bs = Universe::heap()->barrier_set(); 1017 assert(bs->has_write_ref_array_opt(), "Barrier set must have ref array opt"); 1018 bs->write_ref_array(MemRegion((HeapWord*)_methods->obj_at_addr(0), 1019 _methods->length() * HeapWordsPerOop)); 1020 _dirty = false; 1021 } 1022 } 1023 1024 void expand(TRAPS) { 1025 flush(); 1026 1027 objArrayHandle old_head(THREAD, _head); 1028 Pause_No_Safepoint_Verifier pnsv(&_nsv); 1029 1030 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK); 1031 objArrayHandle new_head(THREAD, head); 1032 1033 objArrayOop methods = oopFactory::new_objectArray(trace_chunk_size, CHECK); 1034 objArrayHandle new_methods(THREAD, methods); 1035 1036 typeArrayOop bcis = oopFactory::new_shortArray(trace_chunk_size, CHECK); 1037 typeArrayHandle new_bcis(THREAD, bcis); 1038 1039 if (!old_head.is_null()) { 1040 old_head->obj_at_put(trace_next_offset, new_head()); 1041 } 1042 new_head->obj_at_put(trace_methods_offset, new_methods()); 1043 new_head->obj_at_put(trace_bcis_offset, new_bcis()); 1044 1045 _head = new_head(); 1046 _methods = new_methods(); 1047 _bcis = new_bcis(); 1048 _index = 0; 1049 } 1050 1051 oop backtrace() { 1052 flush(); 1053 return _backtrace(); 1054 } 1055 1056 inline void push(methodOop method, short bci, TRAPS) { 1057 if (_index >= trace_chunk_size) { 1058 methodHandle mhandle(THREAD, method); 1059 expand(CHECK); 1060 method = mhandle(); 1061 } 1062 1063 // _methods->obj_at_put(_index, method); 1064 *_methods->obj_at_addr(_index) = method; 1065 _bcis->ushort_at_put(_index, bci); 1066 _index++; 1067 _dirty = true; 1068 } 1069 1070 methodOop current_method() { 1071 assert(_index >= 0 && _index < trace_chunk_size, "out of range"); 1072 return methodOop(_methods->obj_at(_index)); 1073 } 1074 1075 jushort current_bci() { 1076 assert(_index >= 0 && _index < trace_chunk_size, "out of range"); 1077 return _bcis->ushort_at(_index); 1078 } 1079 }; 1080 1081 1082 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, TRAPS) { 1083 if (!StackTraceInThrowable) return; 1084 ResourceMark rm(THREAD); 1085 1086 // Start out by clearing the backtrace for this object, in case the VM 1087 // runs out of memory while allocating the stack trace 1088 set_backtrace(throwable(), NULL); 1089 if (JDK_Version::is_gte_jdk14x_version()) { 1090 // New since 1.4, clear lazily constructed Java level stacktrace if 1091 // refilling occurs 1092 clear_stacktrace(throwable()); 1093 } 1094 1095 int max_depth = MaxJavaStackTraceDepth; 1096 JavaThread* thread = (JavaThread*)THREAD; 1097 BacktraceBuilder bt(CHECK); 1098 1099 // Instead of using vframe directly, this version of fill_in_stack_trace 1100 // basically handles everything by hand. This significantly improved the 1101 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows. 1102 // See bug 6333838 for more details. 1103 // The "ASSERT" here is to verify this method generates the exactly same stack 1104 // trace as utilizing vframe. 1105 #ifdef ASSERT 1106 vframeStream st(thread); 1107 methodHandle st_method(THREAD, st.method()); 1108 #endif 1109 int total_count = 0; 1110 RegisterMap map(thread, false); 1111 int decode_offset = 0; 1112 nmethod* nm = NULL; 1113 bool skip_fillInStackTrace_check = false; 1114 bool skip_throwableInit_check = false; 1115 1116 for (frame fr = thread->last_frame(); max_depth != total_count;) { 1117 methodOop method = NULL; 1118 int bci = 0; 1119 1120 // Compiled java method case. 1121 if (decode_offset != 0) { 1122 DebugInfoReadStream stream(nm, decode_offset); 1123 decode_offset = stream.read_int(); 1124 method = (methodOop)nm->oop_at(stream.read_int()); 1125 bci = stream.read_bci(); 1126 } else { 1127 if (fr.is_first_frame()) break; 1128 address pc = fr.pc(); 1129 if (fr.is_interpreted_frame()) { 1130 intptr_t bcx = fr.interpreter_frame_bcx(); 1131 method = fr.interpreter_frame_method(); 1132 bci = fr.is_bci(bcx) ? bcx : method->bci_from((address)bcx); 1133 fr = fr.sender(&map); 1134 } else { 1135 CodeBlob* cb = fr.cb(); 1136 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL 1137 // but non nmethod 1138 fr = fr.sender(&map); 1139 if (cb == NULL || !cb->is_nmethod()) { 1140 continue; 1141 } 1142 nm = (nmethod*)cb; 1143 if (nm->method()->is_native()) { 1144 method = nm->method(); 1145 bci = 0; 1146 } else { 1147 PcDesc* pd = nm->pc_desc_at(pc); 1148 decode_offset = pd->scope_decode_offset(); 1149 // if decode_offset is not equal to 0, it will execute the 1150 // "compiled java method case" at the beginning of the loop. 1151 continue; 1152 } 1153 } 1154 } 1155 #ifdef ASSERT 1156 assert(st_method() == method && st.bci() == bci, 1157 "Wrong stack trace"); 1158 st.next(); 1159 // vframeStream::method isn't GC-safe so store off a copy 1160 // of the methodOop in case we GC. 1161 if (!st.at_end()) { 1162 st_method = st.method(); 1163 } 1164 #endif 1165 if (!skip_fillInStackTrace_check) { 1166 // check "fillInStackTrace" only once, so we negate the flag 1167 // after the first time check. 1168 skip_fillInStackTrace_check = true; 1169 if (method->name() == vmSymbols::fillInStackTrace_name()) { 1170 continue; 1171 } 1172 } 1173 // skip <init> methods of the exceptions klass. If there is <init> methods 1174 // that belongs to a superclass of the exception we are going to skipping 1175 // them in stack trace. This is simlar to classic VM. 1176 if (!skip_throwableInit_check) { 1177 if (method->name() == vmSymbols::object_initializer_name() && 1178 throwable->is_a(method->method_holder())) { 1179 continue; 1180 } else { 1181 // if no "Throwable.init()" method found, we stop checking it next time. 1182 skip_throwableInit_check = true; 1183 } 1184 } 1185 bt.push(method, bci, CHECK); 1186 total_count++; 1187 } 1188 1189 // Put completed stack trace into throwable object 1190 set_backtrace(throwable(), bt.backtrace()); 1191 } 1192 1193 void java_lang_Throwable::fill_in_stack_trace(Handle throwable) { 1194 // No-op if stack trace is disabled 1195 if (!StackTraceInThrowable) { 1196 return; 1197 } 1198 1199 // Disable stack traces for some preallocated out of memory errors 1200 if (!Universe::should_fill_in_stack_trace(throwable)) { 1201 return; 1202 } 1203 1204 PRESERVE_EXCEPTION_MARK; 1205 1206 JavaThread* thread = JavaThread::active(); 1207 fill_in_stack_trace(throwable, thread); 1208 // ignore exceptions thrown during stack trace filling 1209 CLEAR_PENDING_EXCEPTION; 1210 } 1211 1212 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 1213 // Allocate stack trace - backtrace is created but not filled in 1214 1215 // No-op if stack trace is disabled 1216 if (!StackTraceInThrowable) return; 1217 1218 objArrayOop h_oop = oopFactory::new_objectArray(trace_size, CHECK); 1219 objArrayHandle backtrace (THREAD, h_oop); 1220 objArrayOop m_oop = oopFactory::new_objectArray(trace_chunk_size, CHECK); 1221 objArrayHandle methods (THREAD, m_oop); 1222 typeArrayOop b = oopFactory::new_shortArray(trace_chunk_size, CHECK); 1223 typeArrayHandle bcis(THREAD, b); 1224 1225 // backtrace has space for one chunk (next is NULL) 1226 backtrace->obj_at_put(trace_methods_offset, methods()); 1227 backtrace->obj_at_put(trace_bcis_offset, bcis()); 1228 set_backtrace(throwable(), backtrace()); 1229 } 1230 1231 1232 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 1233 // Fill in stack trace into preallocated backtrace (no GC) 1234 1235 // No-op if stack trace is disabled 1236 if (!StackTraceInThrowable) return; 1237 1238 assert(throwable->is_a(SystemDictionary::throwable_klass()), "sanity check"); 1239 1240 oop backtrace = java_lang_Throwable::backtrace(throwable()); 1241 assert(backtrace != NULL, "backtrace not preallocated"); 1242 1243 oop m = objArrayOop(backtrace)->obj_at(trace_methods_offset); 1244 objArrayOop methods = objArrayOop(m); 1245 assert(methods != NULL && methods->length() > 0, "method array not preallocated"); 1246 1247 oop b = objArrayOop(backtrace)->obj_at(trace_bcis_offset); 1248 typeArrayOop bcis = typeArrayOop(b); 1249 assert(bcis != NULL, "bci array not preallocated"); 1250 1251 assert(methods->length() == bcis->length(), "method and bci arrays should match"); 1252 1253 JavaThread* thread = JavaThread::current(); 1254 ResourceMark rm(thread); 1255 vframeStream st(thread); 1256 1257 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 1258 // methods as preallocated errors aren't created by "java" code. 1259 1260 // fill in as much stack trace as possible 1261 int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth); 1262 int chunk_count = 0; 1263 1264 for (;!st.at_end(); st.next()) { 1265 // add element 1266 bcis->ushort_at_put(chunk_count, st.bci()); 1267 methods->obj_at_put(chunk_count, st.method()); 1268 1269 chunk_count++; 1270 1271 // Bail-out for deep stacks 1272 if (chunk_count >= max_chunks) break; 1273 } 1274 } 1275 1276 1277 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) { 1278 if (throwable == NULL) { 1279 THROW_0(vmSymbols::java_lang_NullPointerException()); 1280 } 1281 objArrayOop chunk = objArrayOop(backtrace(throwable)); 1282 int depth = 0; 1283 if (chunk != NULL) { 1284 // Iterate over chunks and count full ones 1285 while (true) { 1286 objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset)); 1287 if (next == NULL) break; 1288 depth += trace_chunk_size; 1289 chunk = next; 1290 } 1291 assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check"); 1292 // Count element in remaining partial chunk 1293 objArrayOop methods = objArrayOop(chunk->obj_at(trace_methods_offset)); 1294 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 1295 assert(methods != NULL && bcis != NULL, "sanity check"); 1296 for (int i = 0; i < methods->length(); i++) { 1297 if (methods->obj_at(i) == NULL) break; 1298 depth++; 1299 } 1300 } 1301 return depth; 1302 } 1303 1304 1305 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) { 1306 if (throwable == NULL) { 1307 THROW_0(vmSymbols::java_lang_NullPointerException()); 1308 } 1309 if (index < 0) { 1310 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 1311 } 1312 // Compute how many chunks to skip and index into actual chunk 1313 objArrayOop chunk = objArrayOop(backtrace(throwable)); 1314 int skip_chunks = index / trace_chunk_size; 1315 int chunk_index = index % trace_chunk_size; 1316 while (chunk != NULL && skip_chunks > 0) { 1317 chunk = objArrayOop(chunk->obj_at(trace_next_offset)); 1318 skip_chunks--; 1319 } 1320 if (chunk == NULL) { 1321 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 1322 } 1323 // Get method,bci from chunk 1324 objArrayOop methods = objArrayOop(chunk->obj_at(trace_methods_offset)); 1325 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 1326 assert(methods != NULL && bcis != NULL, "sanity check"); 1327 methodHandle method(THREAD, methodOop(methods->obj_at(chunk_index))); 1328 int bci = bcis->ushort_at(chunk_index); 1329 // Chunk can be partial full 1330 if (method.is_null()) { 1331 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 1332 } 1333 1334 oop element = java_lang_StackTraceElement::create(method, bci, CHECK_0); 1335 return element; 1336 } 1337 1338 oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) { 1339 // SystemDictionary::stackTraceElement_klass() will be null for pre-1.4 JDKs 1340 assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4"); 1341 1342 // Allocate java.lang.StackTraceElement instance 1343 klassOop k = SystemDictionary::stackTraceElement_klass(); 1344 assert(k != NULL, "must be loaded in 1.4+"); 1345 instanceKlassHandle ik (THREAD, k); 1346 if (ik->should_be_initialized()) { 1347 ik->initialize(CHECK_0); 1348 } 1349 1350 Handle element = ik->allocate_instance_handle(CHECK_0); 1351 // Fill in class name 1352 ResourceMark rm(THREAD); 1353 const char* str = instanceKlass::cast(method->method_holder())->external_name(); 1354 oop classname = StringTable::intern((char*) str, CHECK_0); 1355 java_lang_StackTraceElement::set_declaringClass(element(), classname); 1356 // Fill in method name 1357 oop methodname = StringTable::intern(method->name(), CHECK_0); 1358 java_lang_StackTraceElement::set_methodName(element(), methodname); 1359 // Fill in source file name 1360 symbolOop source = instanceKlass::cast(method->method_holder())->source_file_name(); 1361 oop filename = StringTable::intern(source, CHECK_0); 1362 java_lang_StackTraceElement::set_fileName(element(), filename); 1363 // File in source line number 1364 int line_number; 1365 if (method->is_native()) { 1366 // Negative value different from -1 below, enabling Java code in 1367 // class java.lang.StackTraceElement to distinguish "native" from 1368 // "no LineNumberTable". 1369 line_number = -2; 1370 } else { 1371 // Returns -1 if no LineNumberTable, and otherwise actual line number 1372 line_number = method->line_number_from_bci(bci); 1373 } 1374 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 1375 1376 return element(); 1377 } 1378 1379 1380 void java_lang_reflect_AccessibleObject::compute_offsets() { 1381 klassOop k = SystemDictionary::reflect_accessible_object_klass(); 1382 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature()); 1383 } 1384 1385 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 1386 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1387 return (jboolean) reflect->bool_field(override_offset); 1388 } 1389 1390 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 1391 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1392 reflect->bool_field_put(override_offset, (int) value); 1393 } 1394 1395 void java_lang_reflect_Method::compute_offsets() { 1396 klassOop k = SystemDictionary::reflect_method_klass(); 1397 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 1398 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1399 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature()); 1400 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 1401 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 1402 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 1403 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 1404 // The generic signature and annotations fields are only present in 1.5 1405 signature_offset = -1; 1406 annotations_offset = -1; 1407 parameter_annotations_offset = -1; 1408 annotation_default_offset = -1; 1409 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 1410 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 1411 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 1412 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature()); 1413 } 1414 1415 Handle java_lang_reflect_Method::create(TRAPS) { 1416 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1417 klassOop klass = SystemDictionary::reflect_method_klass(); 1418 // This class is eagerly initialized during VM initialization, since we keep a refence 1419 // to one of the methods 1420 assert(instanceKlass::cast(klass)->is_initialized(), "must be initialized"); 1421 return instanceKlass::cast(klass)->allocate_instance_handle(CHECK_NH); 1422 } 1423 1424 oop java_lang_reflect_Method::clazz(oop reflect) { 1425 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1426 return reflect->obj_field(clazz_offset); 1427 } 1428 1429 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 1430 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1431 reflect->obj_field_put(clazz_offset, value); 1432 } 1433 1434 int java_lang_reflect_Method::slot(oop reflect) { 1435 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1436 return reflect->int_field(slot_offset); 1437 } 1438 1439 void java_lang_reflect_Method::set_slot(oop reflect, int value) { 1440 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1441 reflect->int_field_put(slot_offset, value); 1442 } 1443 1444 oop java_lang_reflect_Method::name(oop method) { 1445 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1446 return method->obj_field(name_offset); 1447 } 1448 1449 void java_lang_reflect_Method::set_name(oop method, oop value) { 1450 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1451 method->obj_field_put(name_offset, value); 1452 } 1453 1454 oop java_lang_reflect_Method::return_type(oop method) { 1455 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1456 return method->obj_field(returnType_offset); 1457 } 1458 1459 void java_lang_reflect_Method::set_return_type(oop method, oop value) { 1460 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1461 method->obj_field_put(returnType_offset, value); 1462 } 1463 1464 oop java_lang_reflect_Method::parameter_types(oop method) { 1465 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1466 return method->obj_field(parameterTypes_offset); 1467 } 1468 1469 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 1470 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1471 method->obj_field_put(parameterTypes_offset, value); 1472 } 1473 1474 oop java_lang_reflect_Method::exception_types(oop method) { 1475 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1476 return method->obj_field(exceptionTypes_offset); 1477 } 1478 1479 void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 1480 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1481 method->obj_field_put(exceptionTypes_offset, value); 1482 } 1483 1484 int java_lang_reflect_Method::modifiers(oop method) { 1485 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1486 return method->int_field(modifiers_offset); 1487 } 1488 1489 void java_lang_reflect_Method::set_modifiers(oop method, int value) { 1490 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1491 method->int_field_put(modifiers_offset, value); 1492 } 1493 1494 bool java_lang_reflect_Method::has_signature_field() { 1495 return (signature_offset >= 0); 1496 } 1497 1498 oop java_lang_reflect_Method::signature(oop method) { 1499 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1500 assert(has_signature_field(), "signature field must be present"); 1501 return method->obj_field(signature_offset); 1502 } 1503 1504 void java_lang_reflect_Method::set_signature(oop method, oop value) { 1505 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1506 assert(has_signature_field(), "signature field must be present"); 1507 method->obj_field_put(signature_offset, value); 1508 } 1509 1510 bool java_lang_reflect_Method::has_annotations_field() { 1511 return (annotations_offset >= 0); 1512 } 1513 1514 oop java_lang_reflect_Method::annotations(oop method) { 1515 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1516 assert(has_annotations_field(), "annotations field must be present"); 1517 return method->obj_field(annotations_offset); 1518 } 1519 1520 void java_lang_reflect_Method::set_annotations(oop method, oop value) { 1521 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1522 assert(has_annotations_field(), "annotations field must be present"); 1523 method->obj_field_put(annotations_offset, value); 1524 } 1525 1526 bool java_lang_reflect_Method::has_parameter_annotations_field() { 1527 return (parameter_annotations_offset >= 0); 1528 } 1529 1530 oop java_lang_reflect_Method::parameter_annotations(oop method) { 1531 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1532 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 1533 return method->obj_field(parameter_annotations_offset); 1534 } 1535 1536 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 1537 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1538 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 1539 method->obj_field_put(parameter_annotations_offset, value); 1540 } 1541 1542 bool java_lang_reflect_Method::has_annotation_default_field() { 1543 return (annotation_default_offset >= 0); 1544 } 1545 1546 oop java_lang_reflect_Method::annotation_default(oop method) { 1547 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1548 assert(has_annotation_default_field(), "annotation default field must be present"); 1549 return method->obj_field(annotation_default_offset); 1550 } 1551 1552 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 1553 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1554 assert(has_annotation_default_field(), "annotation default field must be present"); 1555 method->obj_field_put(annotation_default_offset, value); 1556 } 1557 1558 void java_lang_reflect_Constructor::compute_offsets() { 1559 klassOop k = SystemDictionary::reflect_constructor_klass(); 1560 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 1561 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 1562 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 1563 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 1564 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 1565 // The generic signature and annotations fields are only present in 1.5 1566 signature_offset = -1; 1567 annotations_offset = -1; 1568 parameter_annotations_offset = -1; 1569 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 1570 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 1571 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 1572 } 1573 1574 Handle java_lang_reflect_Constructor::create(TRAPS) { 1575 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1576 symbolHandle name = vmSymbolHandles::java_lang_reflect_Constructor(); 1577 klassOop k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 1578 instanceKlassHandle klass (THREAD, k); 1579 // Ensure it is initialized 1580 klass->initialize(CHECK_NH); 1581 return klass->allocate_instance_handle(CHECK_NH); 1582 } 1583 1584 oop java_lang_reflect_Constructor::clazz(oop reflect) { 1585 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1586 return reflect->obj_field(clazz_offset); 1587 } 1588 1589 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 1590 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1591 reflect->obj_field_put(clazz_offset, value); 1592 } 1593 1594 oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 1595 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1596 return constructor->obj_field(parameterTypes_offset); 1597 } 1598 1599 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 1600 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1601 constructor->obj_field_put(parameterTypes_offset, value); 1602 } 1603 1604 oop java_lang_reflect_Constructor::exception_types(oop constructor) { 1605 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1606 return constructor->obj_field(exceptionTypes_offset); 1607 } 1608 1609 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 1610 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1611 constructor->obj_field_put(exceptionTypes_offset, value); 1612 } 1613 1614 int java_lang_reflect_Constructor::slot(oop reflect) { 1615 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1616 return reflect->int_field(slot_offset); 1617 } 1618 1619 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 1620 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1621 reflect->int_field_put(slot_offset, value); 1622 } 1623 1624 int java_lang_reflect_Constructor::modifiers(oop constructor) { 1625 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1626 return constructor->int_field(modifiers_offset); 1627 } 1628 1629 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 1630 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1631 constructor->int_field_put(modifiers_offset, value); 1632 } 1633 1634 bool java_lang_reflect_Constructor::has_signature_field() { 1635 return (signature_offset >= 0); 1636 } 1637 1638 oop java_lang_reflect_Constructor::signature(oop constructor) { 1639 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1640 assert(has_signature_field(), "signature field must be present"); 1641 return constructor->obj_field(signature_offset); 1642 } 1643 1644 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 1645 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1646 assert(has_signature_field(), "signature field must be present"); 1647 constructor->obj_field_put(signature_offset, value); 1648 } 1649 1650 bool java_lang_reflect_Constructor::has_annotations_field() { 1651 return (annotations_offset >= 0); 1652 } 1653 1654 oop java_lang_reflect_Constructor::annotations(oop constructor) { 1655 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1656 assert(has_annotations_field(), "annotations field must be present"); 1657 return constructor->obj_field(annotations_offset); 1658 } 1659 1660 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 1661 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1662 assert(has_annotations_field(), "annotations field must be present"); 1663 constructor->obj_field_put(annotations_offset, value); 1664 } 1665 1666 bool java_lang_reflect_Constructor::has_parameter_annotations_field() { 1667 return (parameter_annotations_offset >= 0); 1668 } 1669 1670 oop java_lang_reflect_Constructor::parameter_annotations(oop method) { 1671 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1672 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 1673 return method->obj_field(parameter_annotations_offset); 1674 } 1675 1676 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 1677 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1678 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 1679 method->obj_field_put(parameter_annotations_offset, value); 1680 } 1681 1682 void java_lang_reflect_Field::compute_offsets() { 1683 klassOop k = SystemDictionary::reflect_field_klass(); 1684 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 1685 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1686 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature()); 1687 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 1688 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 1689 // The generic signature and annotations fields are only present in 1.5 1690 signature_offset = -1; 1691 annotations_offset = -1; 1692 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 1693 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 1694 } 1695 1696 Handle java_lang_reflect_Field::create(TRAPS) { 1697 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1698 symbolHandle name = vmSymbolHandles::java_lang_reflect_Field(); 1699 klassOop k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 1700 instanceKlassHandle klass (THREAD, k); 1701 // Ensure it is initialized 1702 klass->initialize(CHECK_NH); 1703 return klass->allocate_instance_handle(CHECK_NH); 1704 } 1705 1706 oop java_lang_reflect_Field::clazz(oop reflect) { 1707 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1708 return reflect->obj_field(clazz_offset); 1709 } 1710 1711 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 1712 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1713 reflect->obj_field_put(clazz_offset, value); 1714 } 1715 1716 oop java_lang_reflect_Field::name(oop field) { 1717 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1718 return field->obj_field(name_offset); 1719 } 1720 1721 void java_lang_reflect_Field::set_name(oop field, oop value) { 1722 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1723 field->obj_field_put(name_offset, value); 1724 } 1725 1726 oop java_lang_reflect_Field::type(oop field) { 1727 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1728 return field->obj_field(type_offset); 1729 } 1730 1731 void java_lang_reflect_Field::set_type(oop field, oop value) { 1732 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1733 field->obj_field_put(type_offset, value); 1734 } 1735 1736 int java_lang_reflect_Field::slot(oop reflect) { 1737 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1738 return reflect->int_field(slot_offset); 1739 } 1740 1741 void java_lang_reflect_Field::set_slot(oop reflect, int value) { 1742 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1743 reflect->int_field_put(slot_offset, value); 1744 } 1745 1746 int java_lang_reflect_Field::modifiers(oop field) { 1747 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1748 return field->int_field(modifiers_offset); 1749 } 1750 1751 void java_lang_reflect_Field::set_modifiers(oop field, int value) { 1752 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1753 field->int_field_put(modifiers_offset, value); 1754 } 1755 1756 bool java_lang_reflect_Field::has_signature_field() { 1757 return (signature_offset >= 0); 1758 } 1759 1760 oop java_lang_reflect_Field::signature(oop field) { 1761 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1762 assert(has_signature_field(), "signature field must be present"); 1763 return field->obj_field(signature_offset); 1764 } 1765 1766 void java_lang_reflect_Field::set_signature(oop field, oop value) { 1767 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1768 assert(has_signature_field(), "signature field must be present"); 1769 field->obj_field_put(signature_offset, value); 1770 } 1771 1772 bool java_lang_reflect_Field::has_annotations_field() { 1773 return (annotations_offset >= 0); 1774 } 1775 1776 oop java_lang_reflect_Field::annotations(oop field) { 1777 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1778 assert(has_annotations_field(), "annotations field must be present"); 1779 return field->obj_field(annotations_offset); 1780 } 1781 1782 void java_lang_reflect_Field::set_annotations(oop field, oop value) { 1783 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1784 assert(has_annotations_field(), "annotations field must be present"); 1785 field->obj_field_put(annotations_offset, value); 1786 } 1787 1788 1789 void sun_reflect_ConstantPool::compute_offsets() { 1790 klassOop k = SystemDictionary::reflect_constant_pool_klass(); 1791 // This null test can be removed post beta 1792 if (k != NULL) { 1793 compute_offset(_cp_oop_offset, k, vmSymbols::constantPoolOop_name(), vmSymbols::object_signature()); 1794 } 1795 } 1796 1797 1798 Handle sun_reflect_ConstantPool::create(TRAPS) { 1799 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1800 klassOop k = SystemDictionary::reflect_constant_pool_klass(); 1801 instanceKlassHandle klass (THREAD, k); 1802 // Ensure it is initialized 1803 klass->initialize(CHECK_NH); 1804 return klass->allocate_instance_handle(CHECK_NH); 1805 } 1806 1807 1808 oop sun_reflect_ConstantPool::cp_oop(oop reflect) { 1809 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1810 return reflect->obj_field(_cp_oop_offset); 1811 } 1812 1813 1814 void sun_reflect_ConstantPool::set_cp_oop(oop reflect, oop value) { 1815 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1816 reflect->obj_field_put(_cp_oop_offset, value); 1817 } 1818 1819 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() { 1820 klassOop k = SystemDictionary::reflect_unsafe_static_field_accessor_impl_klass(); 1821 // This null test can be removed post beta 1822 if (k != NULL) { 1823 compute_offset(_base_offset, k, 1824 vmSymbols::base_name(), vmSymbols::object_signature()); 1825 } 1826 } 1827 1828 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 1829 klassOop k = SystemDictionary::box_klass(type); 1830 if (k == NULL) return NULL; 1831 instanceKlassHandle h (THREAD, k); 1832 if (!h->is_initialized()) h->initialize(CHECK_0); 1833 return h->allocate_instance(THREAD); 1834 } 1835 1836 1837 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 1838 oop box = initialize_and_allocate(type, CHECK_0); 1839 if (box == NULL) return NULL; 1840 switch (type) { 1841 case T_BOOLEAN: 1842 box->bool_field_put(value_offset, value->z); 1843 break; 1844 case T_CHAR: 1845 box->char_field_put(value_offset, value->c); 1846 break; 1847 case T_FLOAT: 1848 box->float_field_put(value_offset, value->f); 1849 break; 1850 case T_DOUBLE: 1851 box->double_field_put(value_offset, value->d); 1852 break; 1853 case T_BYTE: 1854 box->byte_field_put(value_offset, value->b); 1855 break; 1856 case T_SHORT: 1857 box->short_field_put(value_offset, value->s); 1858 break; 1859 case T_INT: 1860 box->int_field_put(value_offset, value->i); 1861 break; 1862 case T_LONG: 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::basic_type(oop box) { 1873 if (box == NULL) return T_ILLEGAL; 1874 BasicType type = SystemDictionary::box_klass_type(box->klass()); 1875 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 1876 return T_ILLEGAL; 1877 return type; 1878 } 1879 1880 1881 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 1882 BasicType type = SystemDictionary::box_klass_type(box->klass()); 1883 switch (type) { 1884 case T_BOOLEAN: 1885 value->z = box->bool_field(value_offset); 1886 break; 1887 case T_CHAR: 1888 value->c = box->char_field(value_offset); 1889 break; 1890 case T_FLOAT: 1891 value->f = box->float_field(value_offset); 1892 break; 1893 case T_DOUBLE: 1894 value->d = box->double_field(value_offset); 1895 break; 1896 case T_BYTE: 1897 value->b = box->byte_field(value_offset); 1898 break; 1899 case T_SHORT: 1900 value->s = box->short_field(value_offset); 1901 break; 1902 case T_INT: 1903 value->i = box->int_field(value_offset); 1904 break; 1905 case T_LONG: 1906 value->j = box->long_field(value_offset); 1907 break; 1908 default: 1909 return T_ILLEGAL; 1910 } // end switch 1911 return type; 1912 } 1913 1914 1915 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 1916 BasicType type = SystemDictionary::box_klass_type(box->klass()); 1917 switch (type) { 1918 case T_BOOLEAN: 1919 box->bool_field_put(value_offset, value->z); 1920 break; 1921 case T_CHAR: 1922 box->char_field_put(value_offset, value->c); 1923 break; 1924 case T_FLOAT: 1925 box->float_field_put(value_offset, value->f); 1926 break; 1927 case T_DOUBLE: 1928 box->double_field_put(value_offset, value->d); 1929 break; 1930 case T_BYTE: 1931 box->byte_field_put(value_offset, value->b); 1932 break; 1933 case T_SHORT: 1934 box->short_field_put(value_offset, value->s); 1935 break; 1936 case T_INT: 1937 box->int_field_put(value_offset, value->i); 1938 break; 1939 case T_LONG: 1940 box->long_field_put(value_offset, value->j); 1941 break; 1942 default: 1943 return T_ILLEGAL; 1944 } // end switch 1945 return type; 1946 } 1947 1948 1949 // Support for java_lang_ref_Reference 1950 1951 void java_lang_ref_Reference::set_referent(oop ref, oop value) { 1952 ref->obj_field_put(referent_offset, value); 1953 } 1954 1955 oop* java_lang_ref_Reference::referent_addr(oop ref) { 1956 return ref->obj_field_addr(referent_offset); 1957 } 1958 1959 void java_lang_ref_Reference::set_next(oop ref, oop value) { 1960 ref->obj_field_put(next_offset, value); 1961 } 1962 1963 oop* java_lang_ref_Reference::next_addr(oop ref) { 1964 return ref->obj_field_addr(next_offset); 1965 } 1966 1967 void java_lang_ref_Reference::set_discovered(oop ref, oop value) { 1968 ref->obj_field_put(discovered_offset, value); 1969 } 1970 1971 oop* java_lang_ref_Reference::discovered_addr(oop ref) { 1972 return ref->obj_field_addr(discovered_offset); 1973 } 1974 1975 oop* java_lang_ref_Reference::pending_list_lock_addr() { 1976 instanceKlass* ik = instanceKlass::cast(SystemDictionary::reference_klass()); 1977 return (oop*)(((char *)ik->start_of_static_fields()) + static_lock_offset); 1978 } 1979 1980 oop* java_lang_ref_Reference::pending_list_addr() { 1981 instanceKlass* ik = instanceKlass::cast(SystemDictionary::reference_klass()); 1982 return (oop *)(((char *)ik->start_of_static_fields()) + static_pending_offset); 1983 } 1984 1985 1986 // Support for java_lang_ref_SoftReference 1987 1988 jlong java_lang_ref_SoftReference::timestamp(oop ref) { 1989 return ref->long_field(timestamp_offset); 1990 } 1991 1992 jlong java_lang_ref_SoftReference::clock() { 1993 instanceKlass* ik = instanceKlass::cast(SystemDictionary::soft_reference_klass()); 1994 int offset = ik->offset_of_static_fields() + static_clock_offset; 1995 1996 return SystemDictionary::soft_reference_klass()->long_field(offset); 1997 } 1998 1999 void java_lang_ref_SoftReference::set_clock(jlong value) { 2000 instanceKlass* ik = instanceKlass::cast(SystemDictionary::soft_reference_klass()); 2001 int offset = ik->offset_of_static_fields() + static_clock_offset; 2002 2003 SystemDictionary::soft_reference_klass()->long_field_put(offset, value); 2004 } 2005 2006 2007 // Support for java_security_AccessControlContext 2008 2009 int java_security_AccessControlContext::_context_offset = 0; 2010 int java_security_AccessControlContext::_privilegedContext_offset = 0; 2011 int java_security_AccessControlContext::_isPrivileged_offset = 0; 2012 2013 2014 void java_security_AccessControlContext::compute_offsets() { 2015 assert(_isPrivileged_offset == 0, "offsets should be initialized only once"); 2016 fieldDescriptor fd; 2017 instanceKlass* ik = instanceKlass::cast(SystemDictionary::AccessControlContext_klass()); 2018 2019 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) { 2020 fatal("Invalid layout of java.security.AccessControlContext"); 2021 } 2022 _context_offset = fd.offset(); 2023 2024 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) { 2025 fatal("Invalid layout of java.security.AccessControlContext"); 2026 } 2027 _privilegedContext_offset = fd.offset(); 2028 2029 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) { 2030 fatal("Invalid layout of java.security.AccessControlContext"); 2031 } 2032 _isPrivileged_offset = fd.offset(); 2033 } 2034 2035 2036 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) { 2037 assert(_isPrivileged_offset != 0, "offsets should have been initialized"); 2038 // Ensure klass is initialized 2039 instanceKlass::cast(SystemDictionary::AccessControlContext_klass())->initialize(CHECK_0); 2040 // Allocate result 2041 oop result = instanceKlass::cast(SystemDictionary::AccessControlContext_klass())->allocate_instance(CHECK_0); 2042 // Fill in values 2043 result->obj_field_put(_context_offset, context()); 2044 result->obj_field_put(_privilegedContext_offset, privileged_context()); 2045 result->bool_field_put(_isPrivileged_offset, isPrivileged); 2046 return result; 2047 } 2048 2049 2050 // Support for java_lang_ClassLoader 2051 2052 oop java_lang_ClassLoader::parent(oop loader) { 2053 assert(loader->is_oop(), "loader must be oop"); 2054 return loader->obj_field(parent_offset); 2055 } 2056 2057 2058 bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 2059 // Fix for 4474172; see evaluation for more details 2060 loader = non_reflection_class_loader(loader); 2061 2062 oop cl = SystemDictionary::java_system_loader(); 2063 while(cl != NULL) { 2064 if (cl == loader) return true; 2065 cl = parent(cl); 2066 } 2067 return false; 2068 } 2069 2070 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) { 2071 if (loader != NULL) { 2072 // See whether this is one of the class loaders associated with 2073 // the generated bytecodes for reflection, and if so, "magically" 2074 // delegate to its parent to prevent class loading from occurring 2075 // in places where applications using reflection didn't expect it. 2076 klassOop delegating_cl_class = SystemDictionary::reflect_delegating_classloader_klass(); 2077 // This might be null in non-1.4 JDKs 2078 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) { 2079 return parent(loader); 2080 } 2081 } 2082 return loader; 2083 } 2084 2085 2086 // Support for java_lang_System 2087 2088 void java_lang_System::compute_offsets() { 2089 assert(offset_of_static_fields == 0, "offsets should be initialized only once"); 2090 2091 instanceKlass* ik = instanceKlass::cast(SystemDictionary::system_klass()); 2092 offset_of_static_fields = ik->offset_of_static_fields(); 2093 } 2094 2095 int java_lang_System::in_offset_in_bytes() { 2096 return (offset_of_static_fields + static_in_offset); 2097 } 2098 2099 2100 int java_lang_System::out_offset_in_bytes() { 2101 return (offset_of_static_fields + static_out_offset); 2102 } 2103 2104 2105 int java_lang_System::err_offset_in_bytes() { 2106 return (offset_of_static_fields + static_err_offset); 2107 } 2108 2109 2110 2111 int java_lang_String::value_offset; 2112 int java_lang_String::offset_offset; 2113 int java_lang_String::count_offset; 2114 int java_lang_String::hash_offset; 2115 int java_lang_Class::klass_offset; 2116 int java_lang_Class::array_klass_offset; 2117 int java_lang_Class::resolved_constructor_offset; 2118 int java_lang_Class::number_of_fake_oop_fields; 2119 int java_lang_Throwable::backtrace_offset; 2120 int java_lang_Throwable::detailMessage_offset; 2121 int java_lang_Throwable::cause_offset; 2122 int java_lang_Throwable::stackTrace_offset; 2123 int java_lang_reflect_AccessibleObject::override_offset; 2124 int java_lang_reflect_Method::clazz_offset; 2125 int java_lang_reflect_Method::name_offset; 2126 int java_lang_reflect_Method::returnType_offset; 2127 int java_lang_reflect_Method::parameterTypes_offset; 2128 int java_lang_reflect_Method::exceptionTypes_offset; 2129 int java_lang_reflect_Method::slot_offset; 2130 int java_lang_reflect_Method::modifiers_offset; 2131 int java_lang_reflect_Method::signature_offset; 2132 int java_lang_reflect_Method::annotations_offset; 2133 int java_lang_reflect_Method::parameter_annotations_offset; 2134 int java_lang_reflect_Method::annotation_default_offset; 2135 int java_lang_reflect_Constructor::clazz_offset; 2136 int java_lang_reflect_Constructor::parameterTypes_offset; 2137 int java_lang_reflect_Constructor::exceptionTypes_offset; 2138 int java_lang_reflect_Constructor::slot_offset; 2139 int java_lang_reflect_Constructor::modifiers_offset; 2140 int java_lang_reflect_Constructor::signature_offset; 2141 int java_lang_reflect_Constructor::annotations_offset; 2142 int java_lang_reflect_Constructor::parameter_annotations_offset; 2143 int java_lang_reflect_Field::clazz_offset; 2144 int java_lang_reflect_Field::name_offset; 2145 int java_lang_reflect_Field::type_offset; 2146 int java_lang_reflect_Field::slot_offset; 2147 int java_lang_reflect_Field::modifiers_offset; 2148 int java_lang_reflect_Field::signature_offset; 2149 int java_lang_reflect_Field::annotations_offset; 2150 int java_lang_boxing_object::value_offset; 2151 int java_lang_ref_Reference::referent_offset; 2152 int java_lang_ref_Reference::queue_offset; 2153 int java_lang_ref_Reference::next_offset; 2154 int java_lang_ref_Reference::discovered_offset; 2155 int java_lang_ref_Reference::static_lock_offset; 2156 int java_lang_ref_Reference::static_pending_offset; 2157 int java_lang_ref_Reference::number_of_fake_oop_fields; 2158 int java_lang_ref_SoftReference::timestamp_offset; 2159 int java_lang_ref_SoftReference::static_clock_offset; 2160 int java_lang_ClassLoader::parent_offset; 2161 int java_lang_System::offset_of_static_fields; 2162 int java_lang_System::static_in_offset; 2163 int java_lang_System::static_out_offset; 2164 int java_lang_System::static_err_offset; 2165 int java_lang_StackTraceElement::declaringClass_offset; 2166 int java_lang_StackTraceElement::methodName_offset; 2167 int java_lang_StackTraceElement::fileName_offset; 2168 int java_lang_StackTraceElement::lineNumber_offset; 2169 int java_lang_AssertionStatusDirectives::classes_offset; 2170 int java_lang_AssertionStatusDirectives::classEnabled_offset; 2171 int java_lang_AssertionStatusDirectives::packages_offset; 2172 int java_lang_AssertionStatusDirectives::packageEnabled_offset; 2173 int java_lang_AssertionStatusDirectives::deflt_offset; 2174 int java_nio_Buffer::_limit_offset; 2175 int sun_misc_AtomicLongCSImpl::_value_offset; 2176 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0; 2177 int sun_reflect_ConstantPool::_cp_oop_offset; 2178 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset; 2179 2180 2181 // Support for java_lang_StackTraceElement 2182 2183 void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 2184 element->obj_field_put(fileName_offset, value); 2185 } 2186 2187 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 2188 element->obj_field_put(declaringClass_offset, value); 2189 } 2190 2191 void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 2192 element->obj_field_put(methodName_offset, value); 2193 } 2194 2195 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 2196 element->int_field_put(lineNumber_offset, value); 2197 } 2198 2199 2200 // Support for java Assertions - java_lang_AssertionStatusDirectives. 2201 2202 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 2203 o->obj_field_put(classes_offset, val); 2204 } 2205 2206 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 2207 o->obj_field_put(classEnabled_offset, val); 2208 } 2209 2210 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 2211 o->obj_field_put(packages_offset, val); 2212 } 2213 2214 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 2215 o->obj_field_put(packageEnabled_offset, val); 2216 } 2217 2218 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 2219 o->bool_field_put(deflt_offset, val); 2220 } 2221 2222 2223 // Support for intrinsification of java.nio.Buffer.checkIndex 2224 int java_nio_Buffer::limit_offset() { 2225 return _limit_offset; 2226 } 2227 2228 2229 void java_nio_Buffer::compute_offsets() { 2230 klassOop k = SystemDictionary::java_nio_Buffer_klass(); 2231 assert(k != NULL, "must be loaded in 1.4+"); 2232 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature()); 2233 } 2234 2235 // Support for intrinsification of sun.misc.AtomicLongCSImpl.attemptUpdate 2236 int sun_misc_AtomicLongCSImpl::value_offset() { 2237 assert(SystemDictionary::sun_misc_AtomicLongCSImpl_klass() != NULL, "can't call this"); 2238 return _value_offset; 2239 } 2240 2241 2242 void sun_misc_AtomicLongCSImpl::compute_offsets() { 2243 klassOop k = SystemDictionary::sun_misc_AtomicLongCSImpl_klass(); 2244 // If this class is not present, its value field offset won't be referenced. 2245 if (k != NULL) { 2246 compute_offset(_value_offset, k, vmSymbols::value_name(), vmSymbols::long_signature()); 2247 } 2248 } 2249 2250 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) { 2251 if (_owner_offset != 0) return; 2252 2253 assert(JDK_Version::is_gte_jdk16x_version(), "Must be JDK 1.6 or later"); 2254 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK); 2255 klassOop k = SystemDictionary::abstract_ownable_synchronizer_klass(); 2256 compute_offset(_owner_offset, k, 2257 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature()); 2258 } 2259 2260 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 2261 assert(_owner_offset != 0, "Must be initialized"); 2262 return obj->obj_field(_owner_offset); 2263 } 2264 2265 // Compute hard-coded offsets 2266 // Invoked before SystemDictionary::initialize, so pre-loaded classes 2267 // are not available to determine the offset_of_static_fields. 2268 void JavaClasses::compute_hard_coded_offsets() { 2269 const int x = wordSize; 2270 const int header = instanceOopDesc::header_size_in_bytes(); 2271 2272 // Do the String Class 2273 java_lang_String::value_offset = java_lang_String::hc_value_offset * x + header; 2274 java_lang_String::offset_offset = java_lang_String::hc_offset_offset * x + header; 2275 java_lang_String::count_offset = java_lang_String::offset_offset + sizeof (jint); 2276 java_lang_String::hash_offset = java_lang_String::count_offset + sizeof (jint); 2277 2278 // Do the Class Class 2279 java_lang_Class::klass_offset = java_lang_Class::hc_klass_offset * x + header; 2280 java_lang_Class::array_klass_offset = java_lang_Class::hc_array_klass_offset * x + header; 2281 java_lang_Class::resolved_constructor_offset = java_lang_Class::hc_resolved_constructor_offset * x + header; 2282 2283 // This is NOT an offset 2284 java_lang_Class::number_of_fake_oop_fields = java_lang_Class::hc_number_of_fake_oop_fields; 2285 2286 // Throwable Class 2287 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header; 2288 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header; 2289 java_lang_Throwable::cause_offset = java_lang_Throwable::hc_cause_offset * x + header; 2290 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header; 2291 2292 // java_lang_boxing_object 2293 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset * x + header; 2294 2295 // java_lang_ref_Reference: 2296 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header; 2297 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header; 2298 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header; 2299 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header; 2300 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x; 2301 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x; 2302 // Artificial fields for java_lang_ref_Reference 2303 // The first field is for the discovered field added in 1.4 2304 java_lang_ref_Reference::number_of_fake_oop_fields = 1; 2305 2306 // java_lang_ref_SoftReference Class 2307 java_lang_ref_SoftReference::timestamp_offset = java_lang_ref_SoftReference::hc_timestamp_offset * x + header; 2308 // Don't multiply static fields because they are always in wordSize units 2309 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x; 2310 2311 // java_lang_ClassLoader 2312 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header; 2313 2314 // java_lang_System 2315 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x; 2316 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x; 2317 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x; 2318 2319 // java_lang_StackTraceElement 2320 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header; 2321 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header; 2322 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header; 2323 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header; 2324 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header; 2325 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header; 2326 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header; 2327 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header; 2328 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header; 2329 2330 } 2331 2332 2333 // Compute non-hard-coded field offsets of all the classes in this file 2334 void JavaClasses::compute_offsets() { 2335 2336 java_lang_Class::compute_offsets(); 2337 java_lang_System::compute_offsets(); 2338 java_lang_Thread::compute_offsets(); 2339 java_lang_ThreadGroup::compute_offsets(); 2340 java_security_AccessControlContext::compute_offsets(); 2341 // Initialize reflection classes. The layouts of these classes 2342 // changed with the new reflection implementation in JDK 1.4, and 2343 // since the Universe doesn't know what JDK version it is until this 2344 // point we defer computation of these offsets until now. 2345 java_lang_reflect_AccessibleObject::compute_offsets(); 2346 java_lang_reflect_Method::compute_offsets(); 2347 java_lang_reflect_Constructor::compute_offsets(); 2348 java_lang_reflect_Field::compute_offsets(); 2349 if (JDK_Version::is_gte_jdk14x_version()) { 2350 java_nio_Buffer::compute_offsets(); 2351 } 2352 if (JDK_Version::is_gte_jdk15x_version()) { 2353 sun_reflect_ConstantPool::compute_offsets(); 2354 sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets(); 2355 } 2356 sun_misc_AtomicLongCSImpl::compute_offsets(); 2357 } 2358 2359 #ifndef PRODUCT 2360 2361 // These functions exist to assert the validity of hard-coded field offsets to guard 2362 // against changes in the class files 2363 2364 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 2365 EXCEPTION_MARK; 2366 fieldDescriptor fd; 2367 symbolHandle klass_sym = oopFactory::new_symbol_handle(klass_name, CATCH); 2368 klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 2369 instanceKlassHandle h_klass (THREAD, k); 2370 //instanceKlassHandle h_klass(klass); 2371 symbolHandle f_name = oopFactory::new_symbol_handle(field_name, CATCH); 2372 symbolHandle f_sig = oopFactory::new_symbol_handle(field_sig, CATCH); 2373 if (!h_klass->find_local_field(f_name(), f_sig(), &fd)) { 2374 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 2375 return false; 2376 } 2377 if (fd.is_static()) { 2378 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 2379 return false; 2380 } 2381 if (fd.offset() == hardcoded_offset ) { 2382 return true; 2383 } else { 2384 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.", 2385 klass_name, field_name, hardcoded_offset, fd.offset()); 2386 return false; 2387 } 2388 } 2389 2390 2391 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 2392 EXCEPTION_MARK; 2393 fieldDescriptor fd; 2394 symbolHandle klass_sym = oopFactory::new_symbol_handle(klass_name, CATCH); 2395 klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 2396 instanceKlassHandle h_klass (THREAD, k); 2397 symbolHandle f_name = oopFactory::new_symbol_handle(field_name, CATCH); 2398 symbolHandle f_sig = oopFactory::new_symbol_handle(field_sig, CATCH); 2399 if (!h_klass->find_local_field(f_name(), f_sig(), &fd)) { 2400 tty->print_cr("Static field %s.%s not found", klass_name, field_name); 2401 return false; 2402 } 2403 if (!fd.is_static()) { 2404 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name); 2405 return false; 2406 } 2407 if (fd.offset() == hardcoded_offset + h_klass->offset_of_static_fields()) { 2408 return true; 2409 } else { 2410 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()); 2411 return false; 2412 } 2413 } 2414 2415 2416 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) { 2417 EXCEPTION_MARK; 2418 fieldDescriptor fd; 2419 symbolHandle klass_sym = oopFactory::new_symbol_handle(klass_name, CATCH); 2420 klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 2421 instanceKlassHandle h_klass (THREAD, k); 2422 symbolHandle f_name = oopFactory::new_symbol_handle(field_name, CATCH); 2423 symbolHandle f_sig = oopFactory::new_symbol_handle(field_sig, CATCH); 2424 if (!h_klass->find_local_field(f_name(), f_sig(), &fd)) { 2425 tty->print_cr("Static field %s.%s not found", klass_name, field_name); 2426 return false; 2427 } 2428 if (!fd.is_static() || !fd.has_initial_value()) { 2429 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name); 2430 return false; 2431 } 2432 if (!fd.initial_value_tag().is_int()) { 2433 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name); 2434 return false; 2435 } 2436 jint field_value = fd.int_initial_value(); 2437 if (field_value == hardcoded_constant) { 2438 return true; 2439 } else { 2440 tty->print_cr("Constant value of static field %s.%s is hardcoded as %d but should really be %d.", klass_name, field_name, hardcoded_constant, field_value); 2441 return false; 2442 } 2443 } 2444 2445 2446 // Check the hard-coded field offsets of all the classes in this file 2447 2448 void JavaClasses::check_offsets() { 2449 bool valid = true; 2450 2451 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 2452 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig) 2453 2454 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 2455 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig) 2456 2457 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \ 2458 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig) 2459 2460 // java.lang.String 2461 2462 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C"); 2463 CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I"); 2464 CHECK_OFFSET("java/lang/String", java_lang_String, count, "I"); 2465 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I"); 2466 2467 // java.lang.Class 2468 2469 // Fake fields 2470 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked 2471 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked 2472 // CHECK_OFFSET("java/lang/Class", java_lang_Class, resolved_constructor); // %%% this needs to be checked 2473 2474 // java.lang.Throwable 2475 2476 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;"); 2477 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;"); 2478 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;"); 2479 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;"); 2480 2481 // Boxed primitive objects (java_lang_boxing_object) 2482 2483 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 2484 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 2485 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 2486 CHECK_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 2487 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 2488 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 2489 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 2490 CHECK_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 2491 2492 // java.lang.ClassLoader 2493 2494 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;"); 2495 2496 // java.lang.System 2497 2498 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;"); 2499 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;"); 2500 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;"); 2501 2502 // java.lang.StackTraceElement 2503 2504 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;"); 2505 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;"); 2506 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;"); 2507 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I"); 2508 2509 // java.lang.ref.Reference 2510 2511 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;"); 2512 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;"); 2513 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;"); 2514 // Fake field 2515 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;"); 2516 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;"); 2517 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;"); 2518 2519 // java.lang.ref.SoftReference 2520 2521 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J"); 2522 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J"); 2523 2524 // java.lang.AssertionStatusDirectives 2525 // 2526 // The CheckAssertionStatusDirectives boolean can be removed from here and 2527 // globals.hpp after the AssertionStatusDirectives class has been integrated 2528 // into merlin "for some time." Without it, the vm will fail with early 2529 // merlin builds. 2530 2531 if (CheckAssertionStatusDirectives && JDK_Version::is_gte_jdk14x_version()) { 2532 const char* nm = "java/lang/AssertionStatusDirectives"; 2533 const char* sig = "[Ljava/lang/String;"; 2534 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig); 2535 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z"); 2536 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig); 2537 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z"); 2538 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z"); 2539 } 2540 2541 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed"); 2542 } 2543 2544 #endif // PRODUCT 2545 2546 void javaClasses_init() { 2547 JavaClasses::compute_offsets(); 2548 JavaClasses::check_offsets(); 2549 FilteredFieldsMap::initialize(); // must be done after computing offsets. 2550 } --- EOF ---