javaClasses.cpp revision 579:0fbdb4381b99
1/* 2 * Copyright 1997-2009 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 29static void 30compute_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 43static void 44compute_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 53Handle 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 84Handle 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 93Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) { 94 return basic_create_from_unicode(unicode, length, false, CHECK_NH); 95} 96 97Handle 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 101oop 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 106Handle 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 118oop 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 123Handle 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 133Handle 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 HandleMark hm(thread); 151 ThreadToNativeFromVM ttn(thread); 152 js = (_to_java_string_fn)(thread->jni_environment(), str); 153 } 154 return Handle(THREAD, JNIHandles::resolve(js)); 155} 156 157// Converts a Java String to a native C string that can be used for 158// native OS calls. 159char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) { 160 161 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*); 162 static to_platform_string_fn_t _to_platform_string_fn = NULL; 163 164 if (_to_platform_string_fn == NULL) { 165 void *lib_handle = os::native_java_library(); 166 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, hpi::dll_lookup(lib_handle, "GetStringPlatformChars")); 167 if (_to_platform_string_fn == NULL) { 168 fatal("GetStringPlatformChars missing"); 169 } 170 } 171 172 char *native_platform_string; 173 { JavaThread* thread = (JavaThread*)THREAD; 174 assert(thread->is_Java_thread(), "must be java thread"); 175 JNIEnv *env = thread->jni_environment(); 176 jstring js = (jstring) JNIHandles::make_local(env, java_string()); 177 bool is_copy; 178 HandleMark hm(thread); 179 ThreadToNativeFromVM ttn(thread); 180 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy); 181 assert(is_copy == JNI_TRUE, "is_copy value changed"); 182 JNIHandles::destroy_local(js); 183 } 184 return native_platform_string; 185} 186 187Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) { 188 oop obj = java_string(); 189 // Typical usage is to convert all '/' to '.' in string. 190 typeArrayOop value = java_lang_String::value(obj); 191 int offset = java_lang_String::offset(obj); 192 int length = java_lang_String::length(obj); 193 194 // First check if any from_char exist 195 int index; // Declared outside, used later 196 for (index = 0; index < length; index++) { 197 if (value->char_at(index + offset) == from_char) { 198 break; 199 } 200 } 201 if (index == length) { 202 // No from_char, so do not copy. 203 return java_string; 204 } 205 206 // Create new UNICODE buffer. Must handlize value because GC 207 // may happen during String and char array creation. 208 typeArrayHandle h_value(THREAD, value); 209 Handle string = basic_create(length, false, CHECK_NH); 210 211 typeArrayOop from_buffer = h_value(); 212 typeArrayOop to_buffer = java_lang_String::value(string()); 213 214 // Copy contents 215 for (index = 0; index < length; index++) { 216 jchar c = from_buffer->char_at(index + offset); 217 if (c == from_char) { 218 c = to_char; 219 } 220 to_buffer->char_at_put(index, c); 221 } 222 return string; 223} 224 225jchar* java_lang_String::as_unicode_string(oop java_string, int& length) { 226 typeArrayOop value = java_lang_String::value(java_string); 227 int offset = java_lang_String::offset(java_string); 228 length = java_lang_String::length(java_string); 229 230 jchar* result = NEW_RESOURCE_ARRAY(jchar, length); 231 for (int index = 0; index < length; index++) { 232 result[index] = value->char_at(index + offset); 233 } 234 return result; 235} 236 237symbolHandle java_lang_String::as_symbol(Handle java_string, TRAPS) { 238 oop obj = java_string(); 239 typeArrayOop value = java_lang_String::value(obj); 240 int offset = java_lang_String::offset(obj); 241 int length = java_lang_String::length(obj); 242 243 ResourceMark rm(THREAD); 244 symbolHandle result; 245 246 if (length > 0) { 247 int utf8_length = UNICODE::utf8_length(value->char_at_addr(offset), length); 248 char* chars = NEW_RESOURCE_ARRAY(char, utf8_length + 1); 249 UNICODE::convert_to_utf8(value->char_at_addr(offset), length, chars); 250 // Allocate the symbol 251 result = oopFactory::new_symbol_handle(chars, utf8_length, CHECK_(symbolHandle())); 252 } else { 253 result = oopFactory::new_symbol_handle("", 0, CHECK_(symbolHandle())); 254 } 255 return result; 256} 257 258int java_lang_String::utf8_length(oop java_string) { 259 typeArrayOop value = java_lang_String::value(java_string); 260 int offset = java_lang_String::offset(java_string); 261 int length = java_lang_String::length(java_string); 262 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset); 263 return UNICODE::utf8_length(position, length); 264} 265 266char* java_lang_String::as_utf8_string(oop java_string) { 267 typeArrayOop value = java_lang_String::value(java_string); 268 int offset = java_lang_String::offset(java_string); 269 int length = java_lang_String::length(java_string); 270 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset); 271 return UNICODE::as_utf8(position, length); 272} 273 274char* java_lang_String::as_utf8_string(oop java_string, int start, int len) { 275 typeArrayOop value = java_lang_String::value(java_string); 276 int offset = java_lang_String::offset(java_string); 277 int length = java_lang_String::length(java_string); 278 assert(start + len <= length, "just checking"); 279 jchar* position = value->char_at_addr(offset + start); 280 return UNICODE::as_utf8(position, len); 281} 282 283bool java_lang_String::equals(oop java_string, jchar* chars, int len) { 284 assert(SharedSkipVerify || 285 java_string->klass() == SystemDictionary::string_klass(), 286 "must be java_string"); 287 typeArrayOop value = java_lang_String::value(java_string); 288 int offset = java_lang_String::offset(java_string); 289 int length = java_lang_String::length(java_string); 290 if (length != len) { 291 return false; 292 } 293 for (int i = 0; i < len; i++) { 294 if (value->char_at(i + offset) != chars[i]) { 295 return false; 296 } 297 } 298 return true; 299} 300 301void java_lang_String::print(Handle java_string, outputStream* st) { 302 oop obj = java_string(); 303 assert(obj->klass() == SystemDictionary::string_klass(), "must be java_string"); 304 typeArrayOop value = java_lang_String::value(obj); 305 int offset = java_lang_String::offset(obj); 306 int length = java_lang_String::length(obj); 307 308 int end = MIN2(length, 100); 309 if (value == NULL) { 310 // This can happen if, e.g., printing a String 311 // object before its initializer has been called 312 st->print_cr("NULL"); 313 } else { 314 st->print("\""); 315 for (int index = 0; index < length; index++) { 316 st->print("%c", value->char_at(index + offset)); 317 } 318 st->print("\""); 319 } 320} 321 322 323oop java_lang_Class::create_mirror(KlassHandle k, TRAPS) { 324 assert(k->java_mirror() == NULL, "should only assign mirror once"); 325 // Use this moment of initialization to cache modifier_flags also, 326 // to support Class.getModifiers(). Instance classes recalculate 327 // the cached flags after the class file is parsed, but before the 328 // class is put into the system dictionary. 329 int computed_modifiers = k->compute_modifier_flags(CHECK_0); 330 k->set_modifier_flags(computed_modifiers); 331 if (SystemDictionary::class_klass_loaded()) { 332 // Allocate mirror (java.lang.Class instance) 333 Handle mirror = instanceKlass::cast(SystemDictionary::class_klass())->allocate_permanent_instance(CHECK_0); 334 // Setup indirections 335 mirror->obj_field_put(klass_offset, k()); 336 k->set_java_mirror(mirror()); 337 // It might also have a component mirror. This mirror must already exist. 338 if (k->oop_is_javaArray()) { 339 Handle comp_mirror; 340 if (k->oop_is_typeArray()) { 341 BasicType type = typeArrayKlass::cast(k->as_klassOop())->element_type(); 342 comp_mirror = Universe::java_mirror(type); 343 assert(comp_mirror.not_null(), "must have primitive mirror"); 344 } else if (k->oop_is_objArray()) { 345 klassOop element_klass = objArrayKlass::cast(k->as_klassOop())->element_klass(); 346 if (element_klass != NULL 347 && (Klass::cast(element_klass)->oop_is_instance() || 348 Klass::cast(element_klass)->oop_is_javaArray())) { 349 comp_mirror = Klass::cast(element_klass)->java_mirror(); 350 assert(comp_mirror.not_null(), "must have element mirror"); 351 } 352 // else some object array internal to the VM, like systemObjArrayKlassObj 353 } 354 if (comp_mirror.not_null()) { 355 // Two-way link between the array klass and its component mirror: 356 arrayKlass::cast(k->as_klassOop())->set_component_mirror(comp_mirror()); 357 set_array_klass(comp_mirror(), k->as_klassOop()); 358 } 359 } 360 return mirror(); 361 } else { 362 return NULL; 363 } 364} 365 366 367oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) { 368 // This should be improved by adding a field at the Java level or by 369 // introducing a new VM klass (see comment in ClassFileParser) 370 oop java_class = instanceKlass::cast(SystemDictionary::class_klass())->allocate_permanent_instance(CHECK_0); 371 if (type != T_VOID) { 372 klassOop aklass = Universe::typeArrayKlassObj(type); 373 assert(aklass != NULL, "correct bootstrap"); 374 set_array_klass(java_class, aklass); 375 } 376 return java_class; 377} 378 379 380klassOop java_lang_Class::as_klassOop(oop java_class) { 381 //%note memory_2 382 klassOop k = klassOop(java_class->obj_field(klass_offset)); 383 assert(k == NULL || k->is_klass(), "type check"); 384 return k; 385} 386 387 388klassOop java_lang_Class::array_klass(oop java_class) { 389 klassOop k = klassOop(java_class->obj_field(array_klass_offset)); 390 assert(k == NULL || k->is_klass() && Klass::cast(k)->oop_is_javaArray(), "should be array klass"); 391 return k; 392} 393 394 395void java_lang_Class::set_array_klass(oop java_class, klassOop klass) { 396 assert(klass->is_klass() && Klass::cast(klass)->oop_is_javaArray(), "should be array klass"); 397 java_class->obj_field_put(array_klass_offset, klass); 398} 399 400 401methodOop java_lang_Class::resolved_constructor(oop java_class) { 402 oop constructor = java_class->obj_field(resolved_constructor_offset); 403 assert(constructor == NULL || constructor->is_method(), "should be method"); 404 return methodOop(constructor); 405} 406 407 408void java_lang_Class::set_resolved_constructor(oop java_class, methodOop constructor) { 409 assert(constructor->is_method(), "should be method"); 410 java_class->obj_field_put(resolved_constructor_offset, constructor); 411} 412 413 414bool java_lang_Class::is_primitive(oop java_class) { 415 klassOop k = klassOop(java_class->obj_field(klass_offset)); 416 return k == NULL; 417} 418 419 420BasicType java_lang_Class::primitive_type(oop java_class) { 421 assert(java_lang_Class::is_primitive(java_class), "just checking"); 422 klassOop ak = klassOop(java_class->obj_field(array_klass_offset)); 423 BasicType type = T_VOID; 424 if (ak != NULL) { 425 // Note: create_basic_type_mirror above initializes ak to a non-null value. 426 type = arrayKlass::cast(ak)->element_type(); 427 } else { 428 assert(java_class == Universe::void_mirror(), "only valid non-array primitive"); 429 } 430 assert(Universe::java_mirror(type) == java_class, "must be consistent"); 431 return type; 432} 433 434 435oop java_lang_Class::primitive_mirror(BasicType t) { 436 oop mirror = Universe::java_mirror(t); 437 assert(mirror != NULL && mirror->is_a(SystemDictionary::class_klass()), "must be a Class"); 438 assert(java_lang_Class::is_primitive(mirror), "must be primitive"); 439 return mirror; 440} 441 442bool java_lang_Class::offsets_computed = false; 443int java_lang_Class::classRedefinedCount_offset = -1; 444int java_lang_Class::parallelCapable_offset = -1; 445 446void java_lang_Class::compute_offsets() { 447 assert(!offsets_computed, "offsets should be initialized only once"); 448 offsets_computed = true; 449 450 klassOop k = SystemDictionary::class_klass(); 451 // The classRedefinedCount field is only present starting in 1.5, 452 // so don't go fatal. 453 compute_optional_offset(classRedefinedCount_offset, 454 k, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature()); 455 456 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7, 457 klassOop k1 = SystemDictionary::classloader_klass(); 458 compute_optional_offset(parallelCapable_offset, 459 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature()); 460} 461 462// For class loader classes, parallelCapable defined 463// based on non-null field 464// Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it 465bool java_lang_Class::parallelCapable(oop class_loader) { 466 if (!JDK_Version::is_gte_jdk17x_version() 467 || parallelCapable_offset == -1) { 468 // Default for backward compatibility is false 469 return false; 470 } 471 return (class_loader->obj_field(parallelCapable_offset) != NULL); 472} 473 474int java_lang_Class::classRedefinedCount(oop the_class_mirror) { 475 if (!JDK_Version::is_gte_jdk15x_version() 476 || classRedefinedCount_offset == -1) { 477 // The classRedefinedCount field is only present starting in 1.5. 478 // If we don't have an offset for it then just return -1 as a marker. 479 return -1; 480 } 481 482 return the_class_mirror->int_field(classRedefinedCount_offset); 483} 484 485void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) { 486 if (!JDK_Version::is_gte_jdk15x_version() 487 || classRedefinedCount_offset == -1) { 488 // The classRedefinedCount field is only present starting in 1.5. 489 // If we don't have an offset for it then nothing to set. 490 return; 491 } 492 493 the_class_mirror->int_field_put(classRedefinedCount_offset, value); 494} 495 496 497// Note: JDK1.1 and before had a privateInfo_offset field which was used for the 498// platform thread structure, and a eetop offset which was used for thread 499// local storage (and unused by the HotSpot VM). In JDK1.2 the two structures 500// merged, so in the HotSpot VM we just use the eetop field for the thread 501// instead of the privateInfo_offset. 502// 503// Note: The stackSize field is only present starting in 1.4. 504 505int java_lang_Thread::_name_offset = 0; 506int java_lang_Thread::_group_offset = 0; 507int java_lang_Thread::_contextClassLoader_offset = 0; 508int java_lang_Thread::_inheritedAccessControlContext_offset = 0; 509int java_lang_Thread::_priority_offset = 0; 510int java_lang_Thread::_eetop_offset = 0; 511int java_lang_Thread::_daemon_offset = 0; 512int java_lang_Thread::_stillborn_offset = 0; 513int java_lang_Thread::_stackSize_offset = 0; 514int java_lang_Thread::_tid_offset = 0; 515int java_lang_Thread::_thread_status_offset = 0; 516int java_lang_Thread::_park_blocker_offset = 0; 517int java_lang_Thread::_park_event_offset = 0 ; 518 519 520void java_lang_Thread::compute_offsets() { 521 assert(_group_offset == 0, "offsets should be initialized only once"); 522 523 klassOop k = SystemDictionary::thread_klass(); 524 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::char_array_signature()); 525 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature()); 526 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature()); 527 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature()); 528 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature()); 529 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature()); 530 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature()); 531 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature()); 532 // The stackSize field is only present starting in 1.4, so don't go fatal. 533 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature()); 534 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal. 535 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature()); 536 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature()); 537 // The parkBlocker field is only present starting in 1.6, so don't go fatal. 538 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature()); 539 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(), 540 vmSymbols::long_signature()); 541} 542 543 544JavaThread* java_lang_Thread::thread(oop java_thread) { 545 return (JavaThread*)java_thread->address_field(_eetop_offset); 546} 547 548 549void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) { 550 java_thread->address_field_put(_eetop_offset, (address)thread); 551} 552 553 554typeArrayOop java_lang_Thread::name(oop java_thread) { 555 oop name = java_thread->obj_field(_name_offset); 556 assert(name == NULL || (name->is_typeArray() && typeArrayKlass::cast(name->klass())->element_type() == T_CHAR), "just checking"); 557 return typeArrayOop(name); 558} 559 560 561void java_lang_Thread::set_name(oop java_thread, typeArrayOop name) { 562 assert(java_thread->obj_field(_name_offset) == NULL, "name should be NULL"); 563 java_thread->obj_field_put(_name_offset, name); 564} 565 566 567ThreadPriority java_lang_Thread::priority(oop java_thread) { 568 return (ThreadPriority)java_thread->int_field(_priority_offset); 569} 570 571 572void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) { 573 java_thread->int_field_put(_priority_offset, priority); 574} 575 576 577oop java_lang_Thread::threadGroup(oop java_thread) { 578 return java_thread->obj_field(_group_offset); 579} 580 581 582bool java_lang_Thread::is_stillborn(oop java_thread) { 583 return java_thread->bool_field(_stillborn_offset) != 0; 584} 585 586 587// We never have reason to turn the stillborn bit off 588void java_lang_Thread::set_stillborn(oop java_thread) { 589 java_thread->bool_field_put(_stillborn_offset, true); 590} 591 592 593bool java_lang_Thread::is_alive(oop java_thread) { 594 JavaThread* thr = java_lang_Thread::thread(java_thread); 595 return (thr != NULL); 596} 597 598 599bool java_lang_Thread::is_daemon(oop java_thread) { 600 return java_thread->bool_field(_daemon_offset) != 0; 601} 602 603 604void java_lang_Thread::set_daemon(oop java_thread) { 605 java_thread->bool_field_put(_daemon_offset, true); 606} 607 608oop java_lang_Thread::context_class_loader(oop java_thread) { 609 return java_thread->obj_field(_contextClassLoader_offset); 610} 611 612oop java_lang_Thread::inherited_access_control_context(oop java_thread) { 613 return java_thread->obj_field(_inheritedAccessControlContext_offset); 614} 615 616 617jlong java_lang_Thread::stackSize(oop java_thread) { 618 // The stackSize field is only present starting in 1.4 619 if (_stackSize_offset > 0) { 620 assert(JDK_Version::is_gte_jdk14x_version(), "sanity check"); 621 return java_thread->long_field(_stackSize_offset); 622 } else { 623 return 0; 624 } 625} 626 627// Write the thread status value to threadStatus field in java.lang.Thread java class. 628void java_lang_Thread::set_thread_status(oop java_thread, 629 java_lang_Thread::ThreadStatus status) { 630 assert(JavaThread::current()->thread_state() == _thread_in_vm, "Java Thread is not running in vm"); 631 // The threadStatus is only present starting in 1.5 632 if (_thread_status_offset > 0) { 633 java_thread->int_field_put(_thread_status_offset, status); 634 } 635} 636 637// Read thread status value from threadStatus field in java.lang.Thread java class. 638java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) { 639 assert(Thread::current()->is_VM_thread() || 640 JavaThread::current()->thread_state() == _thread_in_vm, 641 "Java Thread is not running in vm"); 642 // The threadStatus is only present starting in 1.5 643 if (_thread_status_offset > 0) { 644 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 645 } else { 646 // All we can easily figure out is if it is alive, but that is 647 // enough info for a valid unknown status. 648 // These aren't restricted to valid set ThreadStatus values, so 649 // use JVMTI values and cast. 650 JavaThread* thr = java_lang_Thread::thread(java_thread); 651 if (thr == NULL) { 652 // the thread hasn't run yet or is in the process of exiting 653 return NEW; 654 } 655 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE; 656 } 657} 658 659 660jlong java_lang_Thread::thread_id(oop java_thread) { 661 // The thread ID field is only present starting in 1.5 662 if (_tid_offset > 0) { 663 return java_thread->long_field(_tid_offset); 664 } else { 665 return 0; 666 } 667} 668 669oop java_lang_Thread::park_blocker(oop java_thread) { 670 assert(JDK_Version::current().supports_thread_park_blocker() && 671 _park_blocker_offset != 0, "Must support parkBlocker field"); 672 673 if (_park_blocker_offset > 0) { 674 return java_thread->obj_field(_park_blocker_offset); 675 } 676 677 return NULL; 678} 679 680jlong java_lang_Thread::park_event(oop java_thread) { 681 if (_park_event_offset > 0) { 682 return java_thread->long_field(_park_event_offset); 683 } 684 return 0; 685} 686 687bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) { 688 if (_park_event_offset > 0) { 689 java_thread->long_field_put(_park_event_offset, ptr); 690 return true; 691 } 692 return false; 693} 694 695 696const char* java_lang_Thread::thread_status_name(oop java_thread) { 697 assert(JDK_Version::is_gte_jdk15x_version() && _thread_status_offset != 0, "Must have thread status"); 698 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 699 switch (status) { 700 case NEW : return "NEW"; 701 case RUNNABLE : return "RUNNABLE"; 702 case SLEEPING : return "TIMED_WAITING (sleeping)"; 703 case IN_OBJECT_WAIT : return "WAITING (on object monitor)"; 704 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)"; 705 case PARKED : return "WAITING (parking)"; 706 case PARKED_TIMED : return "TIMED_WAITING (parking)"; 707 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)"; 708 case TERMINATED : return "TERMINATED"; 709 default : return "UNKNOWN"; 710 }; 711} 712int java_lang_ThreadGroup::_parent_offset = 0; 713int java_lang_ThreadGroup::_name_offset = 0; 714int java_lang_ThreadGroup::_threads_offset = 0; 715int java_lang_ThreadGroup::_groups_offset = 0; 716int java_lang_ThreadGroup::_maxPriority_offset = 0; 717int java_lang_ThreadGroup::_destroyed_offset = 0; 718int java_lang_ThreadGroup::_daemon_offset = 0; 719int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0; 720int java_lang_ThreadGroup::_nthreads_offset = 0; 721int java_lang_ThreadGroup::_ngroups_offset = 0; 722 723oop java_lang_ThreadGroup::parent(oop java_thread_group) { 724 assert(java_thread_group->is_oop(), "thread group must be oop"); 725 return java_thread_group->obj_field(_parent_offset); 726} 727 728// ("name as oop" accessor is not necessary) 729 730typeArrayOop java_lang_ThreadGroup::name(oop java_thread_group) { 731 oop name = java_thread_group->obj_field(_name_offset); 732 // ThreadGroup.name can be null 733 return name == NULL ? (typeArrayOop)NULL : java_lang_String::value(name); 734} 735 736int java_lang_ThreadGroup::nthreads(oop java_thread_group) { 737 assert(java_thread_group->is_oop(), "thread group must be oop"); 738 return java_thread_group->int_field(_nthreads_offset); 739} 740 741objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) { 742 oop threads = java_thread_group->obj_field(_threads_offset); 743 assert(threads != NULL, "threadgroups should have threads"); 744 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code 745 return objArrayOop(threads); 746} 747 748int java_lang_ThreadGroup::ngroups(oop java_thread_group) { 749 assert(java_thread_group->is_oop(), "thread group must be oop"); 750 return java_thread_group->int_field(_ngroups_offset); 751} 752 753objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) { 754 oop groups = java_thread_group->obj_field(_groups_offset); 755 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code 756 return objArrayOop(groups); 757} 758 759ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) { 760 assert(java_thread_group->is_oop(), "thread group must be oop"); 761 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset); 762} 763 764bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) { 765 assert(java_thread_group->is_oop(), "thread group must be oop"); 766 return java_thread_group->bool_field(_destroyed_offset) != 0; 767} 768 769bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) { 770 assert(java_thread_group->is_oop(), "thread group must be oop"); 771 return java_thread_group->bool_field(_daemon_offset) != 0; 772} 773 774bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) { 775 assert(java_thread_group->is_oop(), "thread group must be oop"); 776 return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0; 777} 778 779void java_lang_ThreadGroup::compute_offsets() { 780 assert(_parent_offset == 0, "offsets should be initialized only once"); 781 782 klassOop k = SystemDictionary::threadGroup_klass(); 783 784 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature()); 785 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 786 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature()); 787 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature()); 788 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature()); 789 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature()); 790 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature()); 791 compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature()); 792 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature()); 793 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature()); 794} 795 796oop java_lang_Throwable::backtrace(oop throwable) { 797 return throwable->obj_field_acquire(backtrace_offset); 798} 799 800 801void java_lang_Throwable::set_backtrace(oop throwable, oop value) { 802 throwable->release_obj_field_put(backtrace_offset, value); 803} 804 805 806oop java_lang_Throwable::message(oop throwable) { 807 return throwable->obj_field(detailMessage_offset); 808} 809 810 811oop java_lang_Throwable::message(Handle throwable) { 812 return throwable->obj_field(detailMessage_offset); 813} 814 815 816void java_lang_Throwable::set_message(oop throwable, oop value) { 817 throwable->obj_field_put(detailMessage_offset, value); 818} 819 820 821void java_lang_Throwable::clear_stacktrace(oop throwable) { 822 assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4"); 823 throwable->obj_field_put(stackTrace_offset, NULL); 824} 825 826 827void java_lang_Throwable::print(oop throwable, outputStream* st) { 828 ResourceMark rm; 829 klassOop k = throwable->klass(); 830 assert(k != NULL, "just checking"); 831 st->print("%s", instanceKlass::cast(k)->external_name()); 832 oop msg = message(throwable); 833 if (msg != NULL) { 834 st->print(": %s", java_lang_String::as_utf8_string(msg)); 835 } 836} 837 838 839void java_lang_Throwable::print(Handle throwable, outputStream* st) { 840 ResourceMark rm; 841 klassOop k = throwable->klass(); 842 assert(k != NULL, "just checking"); 843 st->print("%s", instanceKlass::cast(k)->external_name()); 844 oop msg = message(throwable); 845 if (msg != NULL) { 846 st->print(": %s", java_lang_String::as_utf8_string(msg)); 847 } 848} 849 850// Print stack trace element to resource allocated buffer 851char* java_lang_Throwable::print_stack_element_to_buffer(methodOop method, int bci) { 852 // Get strings and string lengths 853 instanceKlass* klass = instanceKlass::cast(method->method_holder()); 854 const char* klass_name = klass->external_name(); 855 int buf_len = (int)strlen(klass_name); 856 char* source_file_name; 857 if (klass->source_file_name() == NULL) { 858 source_file_name = NULL; 859 } else { 860 source_file_name = klass->source_file_name()->as_C_string(); 861 buf_len += (int)strlen(source_file_name); 862 } 863 char* method_name = method->name()->as_C_string(); 864 buf_len += (int)strlen(method_name); 865 866 // Allocate temporary buffer with extra space for formatting and line number 867 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64); 868 869 // Print stack trace line in buffer 870 sprintf(buf, "\tat %s.%s", klass_name, method_name); 871 if (method->is_native()) { 872 strcat(buf, "(Native Method)"); 873 } else { 874 int line_number = method->line_number_from_bci(bci); 875 if (source_file_name != NULL && (line_number != -1)) { 876 // Sourcename and linenumber 877 sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number); 878 } else if (source_file_name != NULL) { 879 // Just sourcename 880 sprintf(buf + (int)strlen(buf), "(%s)", source_file_name); 881 } else { 882 // Neither soucename and linenumber 883 sprintf(buf + (int)strlen(buf), "(Unknown Source)"); 884 } 885 nmethod* nm = method->code(); 886 if (WizardMode && nm != NULL) { 887 sprintf(buf + (int)strlen(buf), "(nmethod " PTR_FORMAT ")", (intptr_t)nm); 888 } 889 } 890 891 return buf; 892} 893 894 895void java_lang_Throwable::print_stack_element(Handle stream, methodOop method, int bci) { 896 ResourceMark rm; 897 char* buf = print_stack_element_to_buffer(method, bci); 898 print_to_stream(stream, buf); 899} 900 901void java_lang_Throwable::print_stack_element(outputStream *st, methodOop method, int bci) { 902 ResourceMark rm; 903 char* buf = print_stack_element_to_buffer(method, bci); 904 st->print_cr("%s", buf); 905} 906 907void java_lang_Throwable::print_to_stream(Handle stream, const char* str) { 908 if (stream.is_null()) { 909 tty->print_cr("%s", str); 910 } else { 911 EXCEPTION_MARK; 912 JavaValue result(T_VOID); 913 Handle arg (THREAD, oopFactory::new_charArray(str, THREAD)); 914 if (!HAS_PENDING_EXCEPTION) { 915 JavaCalls::call_virtual(&result, 916 stream, 917 KlassHandle(THREAD, stream->klass()), 918 vmSymbolHandles::println_name(), 919 vmSymbolHandles::char_array_void_signature(), 920 arg, 921 THREAD); 922 } 923 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 924 if (HAS_PENDING_EXCEPTION) CLEAR_PENDING_EXCEPTION; 925 } 926 927} 928 929 930const char* java_lang_Throwable::no_stack_trace_message() { 931 return "\t<<no stack trace available>>"; 932} 933 934 935// Currently used only for exceptions occurring during startup 936void java_lang_Throwable::print_stack_trace(oop throwable, outputStream* st) { 937 Thread *THREAD = Thread::current(); 938 Handle h_throwable(THREAD, throwable); 939 while (h_throwable.not_null()) { 940 objArrayHandle result (THREAD, objArrayOop(backtrace(h_throwable()))); 941 if (result.is_null()) { 942 st->print_cr(no_stack_trace_message()); 943 return; 944 } 945 946 while (result.not_null()) { 947 objArrayHandle methods (THREAD, 948 objArrayOop(result->obj_at(trace_methods_offset))); 949 typeArrayHandle bcis (THREAD, 950 typeArrayOop(result->obj_at(trace_bcis_offset))); 951 952 if (methods.is_null() || bcis.is_null()) { 953 st->print_cr(no_stack_trace_message()); 954 return; 955 } 956 957 int length = methods()->length(); 958 for (int index = 0; index < length; index++) { 959 methodOop method = methodOop(methods()->obj_at(index)); 960 if (method == NULL) goto handle_cause; 961 int bci = bcis->ushort_at(index); 962 print_stack_element(st, method, bci); 963 } 964 result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset))); 965 } 966 handle_cause: 967 { 968 EXCEPTION_MARK; 969 JavaValue result(T_OBJECT); 970 JavaCalls::call_virtual(&result, 971 h_throwable, 972 KlassHandle(THREAD, h_throwable->klass()), 973 vmSymbolHandles::getCause_name(), 974 vmSymbolHandles::void_throwable_signature(), 975 THREAD); 976 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 977 if (HAS_PENDING_EXCEPTION) { 978 CLEAR_PENDING_EXCEPTION; 979 h_throwable = Handle(); 980 } else { 981 h_throwable = Handle(THREAD, (oop) result.get_jobject()); 982 if (h_throwable.not_null()) { 983 st->print("Caused by: "); 984 print(h_throwable, st); 985 st->cr(); 986 } 987 } 988 } 989 } 990} 991 992 993void java_lang_Throwable::print_stack_trace(oop throwable, oop print_stream) { 994 // Note: this is no longer used in Merlin, but we support it for compatibility. 995 Thread *thread = Thread::current(); 996 Handle stream(thread, print_stream); 997 objArrayHandle result (thread, objArrayOop(backtrace(throwable))); 998 if (result.is_null()) { 999 print_to_stream(stream, no_stack_trace_message()); 1000 return; 1001 } 1002 1003 while (result.not_null()) { 1004 objArrayHandle methods (thread, 1005 objArrayOop(result->obj_at(trace_methods_offset))); 1006 typeArrayHandle bcis (thread, 1007 typeArrayOop(result->obj_at(trace_bcis_offset))); 1008 1009 if (methods.is_null() || bcis.is_null()) { 1010 print_to_stream(stream, no_stack_trace_message()); 1011 return; 1012 } 1013 1014 int length = methods()->length(); 1015 for (int index = 0; index < length; index++) { 1016 methodOop method = methodOop(methods()->obj_at(index)); 1017 if (method == NULL) return; 1018 int bci = bcis->ushort_at(index); 1019 print_stack_element(stream, method, bci); 1020 } 1021 result = objArrayHandle(thread, objArrayOop(result->obj_at(trace_next_offset))); 1022 } 1023} 1024 1025// This class provides a simple wrapper over the internal structure of 1026// exception backtrace to insulate users of the backtrace from needing 1027// to know what it looks like. 1028class BacktraceBuilder: public StackObj { 1029 private: 1030 Handle _backtrace; 1031 objArrayOop _head; 1032 objArrayOop _methods; 1033 typeArrayOop _bcis; 1034 int _index; 1035 bool _dirty; 1036 No_Safepoint_Verifier _nsv; 1037 1038 public: 1039 1040 enum { 1041 trace_methods_offset = java_lang_Throwable::trace_methods_offset, 1042 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset, 1043 trace_next_offset = java_lang_Throwable::trace_next_offset, 1044 trace_size = java_lang_Throwable::trace_size, 1045 trace_chunk_size = java_lang_Throwable::trace_chunk_size 1046 }; 1047 1048 // constructor for new backtrace 1049 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _dirty(false) { 1050 expand(CHECK); 1051 _backtrace = _head; 1052 _index = 0; 1053 } 1054 1055 void flush() { 1056 if (_dirty && _methods != NULL) { 1057 BarrierSet* bs = Universe::heap()->barrier_set(); 1058 assert(bs->has_write_ref_array_opt(), "Barrier set must have ref array opt"); 1059 bs->write_ref_array(MemRegion((HeapWord*)_methods->base(), 1060 _methods->array_size())); 1061 _dirty = false; 1062 } 1063 } 1064 1065 void expand(TRAPS) { 1066 flush(); 1067 1068 objArrayHandle old_head(THREAD, _head); 1069 Pause_No_Safepoint_Verifier pnsv(&_nsv); 1070 1071 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK); 1072 objArrayHandle new_head(THREAD, head); 1073 1074 objArrayOop methods = oopFactory::new_objectArray(trace_chunk_size, CHECK); 1075 objArrayHandle new_methods(THREAD, methods); 1076 1077 typeArrayOop bcis = oopFactory::new_shortArray(trace_chunk_size, CHECK); 1078 typeArrayHandle new_bcis(THREAD, bcis); 1079 1080 if (!old_head.is_null()) { 1081 old_head->obj_at_put(trace_next_offset, new_head()); 1082 } 1083 new_head->obj_at_put(trace_methods_offset, new_methods()); 1084 new_head->obj_at_put(trace_bcis_offset, new_bcis()); 1085 1086 _head = new_head(); 1087 _methods = new_methods(); 1088 _bcis = new_bcis(); 1089 _index = 0; 1090 } 1091 1092 oop backtrace() { 1093 flush(); 1094 return _backtrace(); 1095 } 1096 1097 inline void push(methodOop method, short bci, TRAPS) { 1098 if (_index >= trace_chunk_size) { 1099 methodHandle mhandle(THREAD, method); 1100 expand(CHECK); 1101 method = mhandle(); 1102 } 1103 1104 _methods->obj_at_put(_index, method); 1105 // bad for UseCompressedOops 1106 // *_methods->obj_at_addr(_index) = method; 1107 _bcis->ushort_at_put(_index, bci); 1108 _index++; 1109 _dirty = true; 1110 } 1111 1112 methodOop current_method() { 1113 assert(_index >= 0 && _index < trace_chunk_size, "out of range"); 1114 return methodOop(_methods->obj_at(_index)); 1115 } 1116 1117 jushort current_bci() { 1118 assert(_index >= 0 && _index < trace_chunk_size, "out of range"); 1119 return _bcis->ushort_at(_index); 1120 } 1121}; 1122 1123 1124void java_lang_Throwable::fill_in_stack_trace(Handle throwable, TRAPS) { 1125 if (!StackTraceInThrowable) return; 1126 ResourceMark rm(THREAD); 1127 1128 // Start out by clearing the backtrace for this object, in case the VM 1129 // runs out of memory while allocating the stack trace 1130 set_backtrace(throwable(), NULL); 1131 if (JDK_Version::is_gte_jdk14x_version()) { 1132 // New since 1.4, clear lazily constructed Java level stacktrace if 1133 // refilling occurs 1134 clear_stacktrace(throwable()); 1135 } 1136 1137 int max_depth = MaxJavaStackTraceDepth; 1138 JavaThread* thread = (JavaThread*)THREAD; 1139 BacktraceBuilder bt(CHECK); 1140 1141 // Instead of using vframe directly, this version of fill_in_stack_trace 1142 // basically handles everything by hand. This significantly improved the 1143 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows. 1144 // See bug 6333838 for more details. 1145 // The "ASSERT" here is to verify this method generates the exactly same stack 1146 // trace as utilizing vframe. 1147#ifdef ASSERT 1148 vframeStream st(thread); 1149 methodHandle st_method(THREAD, st.method()); 1150#endif 1151 int total_count = 0; 1152 RegisterMap map(thread, false); 1153 int decode_offset = 0; 1154 nmethod* nm = NULL; 1155 bool skip_fillInStackTrace_check = false; 1156 bool skip_throwableInit_check = false; 1157 1158 for (frame fr = thread->last_frame(); max_depth != total_count;) { 1159 methodOop method = NULL; 1160 int bci = 0; 1161 1162 // Compiled java method case. 1163 if (decode_offset != 0) { 1164 DebugInfoReadStream stream(nm, decode_offset); 1165 decode_offset = stream.read_int(); 1166 method = (methodOop)nm->oop_at(stream.read_int()); 1167 bci = stream.read_bci(); 1168 } else { 1169 if (fr.is_first_frame()) break; 1170 address pc = fr.pc(); 1171 if (fr.is_interpreted_frame()) { 1172 intptr_t bcx = fr.interpreter_frame_bcx(); 1173 method = fr.interpreter_frame_method(); 1174 bci = fr.is_bci(bcx) ? bcx : method->bci_from((address)bcx); 1175 fr = fr.sender(&map); 1176 } else { 1177 CodeBlob* cb = fr.cb(); 1178 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL 1179 // but non nmethod 1180 fr = fr.sender(&map); 1181 if (cb == NULL || !cb->is_nmethod()) { 1182 continue; 1183 } 1184 nm = (nmethod*)cb; 1185 if (nm->method()->is_native()) { 1186 method = nm->method(); 1187 bci = 0; 1188 } else { 1189 PcDesc* pd = nm->pc_desc_at(pc); 1190 decode_offset = pd->scope_decode_offset(); 1191 // if decode_offset is not equal to 0, it will execute the 1192 // "compiled java method case" at the beginning of the loop. 1193 continue; 1194 } 1195 } 1196 } 1197#ifdef ASSERT 1198 assert(st_method() == method && st.bci() == bci, 1199 "Wrong stack trace"); 1200 st.next(); 1201 // vframeStream::method isn't GC-safe so store off a copy 1202 // of the methodOop in case we GC. 1203 if (!st.at_end()) { 1204 st_method = st.method(); 1205 } 1206#endif 1207 if (!skip_fillInStackTrace_check) { 1208 // check "fillInStackTrace" only once, so we negate the flag 1209 // after the first time check. 1210 skip_fillInStackTrace_check = true; 1211 if (method->name() == vmSymbols::fillInStackTrace_name()) { 1212 continue; 1213 } 1214 } 1215 // skip <init> methods of the exceptions klass. If there is <init> methods 1216 // that belongs to a superclass of the exception we are going to skipping 1217 // them in stack trace. This is simlar to classic VM. 1218 if (!skip_throwableInit_check) { 1219 if (method->name() == vmSymbols::object_initializer_name() && 1220 throwable->is_a(method->method_holder())) { 1221 continue; 1222 } else { 1223 // if no "Throwable.init()" method found, we stop checking it next time. 1224 skip_throwableInit_check = true; 1225 } 1226 } 1227 bt.push(method, bci, CHECK); 1228 total_count++; 1229 } 1230 1231 // Put completed stack trace into throwable object 1232 set_backtrace(throwable(), bt.backtrace()); 1233} 1234 1235void java_lang_Throwable::fill_in_stack_trace(Handle throwable) { 1236 // No-op if stack trace is disabled 1237 if (!StackTraceInThrowable) { 1238 return; 1239 } 1240 1241 // Disable stack traces for some preallocated out of memory errors 1242 if (!Universe::should_fill_in_stack_trace(throwable)) { 1243 return; 1244 } 1245 1246 PRESERVE_EXCEPTION_MARK; 1247 1248 JavaThread* thread = JavaThread::active(); 1249 fill_in_stack_trace(throwable, thread); 1250 // ignore exceptions thrown during stack trace filling 1251 CLEAR_PENDING_EXCEPTION; 1252} 1253 1254void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 1255 // Allocate stack trace - backtrace is created but not filled in 1256 1257 // No-op if stack trace is disabled 1258 if (!StackTraceInThrowable) return; 1259 1260 objArrayOop h_oop = oopFactory::new_objectArray(trace_size, CHECK); 1261 objArrayHandle backtrace (THREAD, h_oop); 1262 objArrayOop m_oop = oopFactory::new_objectArray(trace_chunk_size, CHECK); 1263 objArrayHandle methods (THREAD, m_oop); 1264 typeArrayOop b = oopFactory::new_shortArray(trace_chunk_size, CHECK); 1265 typeArrayHandle bcis(THREAD, b); 1266 1267 // backtrace has space for one chunk (next is NULL) 1268 backtrace->obj_at_put(trace_methods_offset, methods()); 1269 backtrace->obj_at_put(trace_bcis_offset, bcis()); 1270 set_backtrace(throwable(), backtrace()); 1271} 1272 1273 1274void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 1275 // Fill in stack trace into preallocated backtrace (no GC) 1276 1277 // No-op if stack trace is disabled 1278 if (!StackTraceInThrowable) return; 1279 1280 assert(throwable->is_a(SystemDictionary::throwable_klass()), "sanity check"); 1281 1282 oop backtrace = java_lang_Throwable::backtrace(throwable()); 1283 assert(backtrace != NULL, "backtrace not preallocated"); 1284 1285 oop m = objArrayOop(backtrace)->obj_at(trace_methods_offset); 1286 objArrayOop methods = objArrayOop(m); 1287 assert(methods != NULL && methods->length() > 0, "method array not preallocated"); 1288 1289 oop b = objArrayOop(backtrace)->obj_at(trace_bcis_offset); 1290 typeArrayOop bcis = typeArrayOop(b); 1291 assert(bcis != NULL, "bci array not preallocated"); 1292 1293 assert(methods->length() == bcis->length(), "method and bci arrays should match"); 1294 1295 JavaThread* thread = JavaThread::current(); 1296 ResourceMark rm(thread); 1297 vframeStream st(thread); 1298 1299 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 1300 // methods as preallocated errors aren't created by "java" code. 1301 1302 // fill in as much stack trace as possible 1303 int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth); 1304 int chunk_count = 0; 1305 1306 for (;!st.at_end(); st.next()) { 1307 // add element 1308 bcis->ushort_at_put(chunk_count, st.bci()); 1309 methods->obj_at_put(chunk_count, st.method()); 1310 1311 chunk_count++; 1312 1313 // Bail-out for deep stacks 1314 if (chunk_count >= max_chunks) break; 1315 } 1316} 1317 1318 1319int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) { 1320 if (throwable == NULL) { 1321 THROW_0(vmSymbols::java_lang_NullPointerException()); 1322 } 1323 objArrayOop chunk = objArrayOop(backtrace(throwable)); 1324 int depth = 0; 1325 if (chunk != NULL) { 1326 // Iterate over chunks and count full ones 1327 while (true) { 1328 objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset)); 1329 if (next == NULL) break; 1330 depth += trace_chunk_size; 1331 chunk = next; 1332 } 1333 assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check"); 1334 // Count element in remaining partial chunk 1335 objArrayOop methods = objArrayOop(chunk->obj_at(trace_methods_offset)); 1336 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 1337 assert(methods != NULL && bcis != NULL, "sanity check"); 1338 for (int i = 0; i < methods->length(); i++) { 1339 if (methods->obj_at(i) == NULL) break; 1340 depth++; 1341 } 1342 } 1343 return depth; 1344} 1345 1346 1347oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) { 1348 if (throwable == NULL) { 1349 THROW_0(vmSymbols::java_lang_NullPointerException()); 1350 } 1351 if (index < 0) { 1352 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 1353 } 1354 // Compute how many chunks to skip and index into actual chunk 1355 objArrayOop chunk = objArrayOop(backtrace(throwable)); 1356 int skip_chunks = index / trace_chunk_size; 1357 int chunk_index = index % trace_chunk_size; 1358 while (chunk != NULL && skip_chunks > 0) { 1359 chunk = objArrayOop(chunk->obj_at(trace_next_offset)); 1360 skip_chunks--; 1361 } 1362 if (chunk == NULL) { 1363 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 1364 } 1365 // Get method,bci from chunk 1366 objArrayOop methods = objArrayOop(chunk->obj_at(trace_methods_offset)); 1367 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 1368 assert(methods != NULL && bcis != NULL, "sanity check"); 1369 methodHandle method(THREAD, methodOop(methods->obj_at(chunk_index))); 1370 int bci = bcis->ushort_at(chunk_index); 1371 // Chunk can be partial full 1372 if (method.is_null()) { 1373 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 1374 } 1375 1376 oop element = java_lang_StackTraceElement::create(method, bci, CHECK_0); 1377 return element; 1378} 1379 1380oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) { 1381 // SystemDictionary::stackTraceElement_klass() will be null for pre-1.4 JDKs 1382 assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4"); 1383 1384 // Allocate java.lang.StackTraceElement instance 1385 klassOop k = SystemDictionary::stackTraceElement_klass(); 1386 assert(k != NULL, "must be loaded in 1.4+"); 1387 instanceKlassHandle ik (THREAD, k); 1388 if (ik->should_be_initialized()) { 1389 ik->initialize(CHECK_0); 1390 } 1391 1392 Handle element = ik->allocate_instance_handle(CHECK_0); 1393 // Fill in class name 1394 ResourceMark rm(THREAD); 1395 const char* str = instanceKlass::cast(method->method_holder())->external_name(); 1396 oop classname = StringTable::intern((char*) str, CHECK_0); 1397 java_lang_StackTraceElement::set_declaringClass(element(), classname); 1398 // Fill in method name 1399 oop methodname = StringTable::intern(method->name(), CHECK_0); 1400 java_lang_StackTraceElement::set_methodName(element(), methodname); 1401 // Fill in source file name 1402 symbolOop source = instanceKlass::cast(method->method_holder())->source_file_name(); 1403 oop filename = StringTable::intern(source, CHECK_0); 1404 java_lang_StackTraceElement::set_fileName(element(), filename); 1405 // File in source line number 1406 int line_number; 1407 if (method->is_native()) { 1408 // Negative value different from -1 below, enabling Java code in 1409 // class java.lang.StackTraceElement to distinguish "native" from 1410 // "no LineNumberTable". 1411 line_number = -2; 1412 } else { 1413 // Returns -1 if no LineNumberTable, and otherwise actual line number 1414 line_number = method->line_number_from_bci(bci); 1415 } 1416 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 1417 1418 return element(); 1419} 1420 1421 1422void java_lang_reflect_AccessibleObject::compute_offsets() { 1423 klassOop k = SystemDictionary::reflect_accessible_object_klass(); 1424 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature()); 1425} 1426 1427jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 1428 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1429 return (jboolean) reflect->bool_field(override_offset); 1430} 1431 1432void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 1433 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1434 reflect->bool_field_put(override_offset, (int) value); 1435} 1436 1437void java_lang_reflect_Method::compute_offsets() { 1438 klassOop k = SystemDictionary::reflect_method_klass(); 1439 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 1440 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1441 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature()); 1442 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 1443 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 1444 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 1445 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 1446 // The generic signature and annotations fields are only present in 1.5 1447 signature_offset = -1; 1448 annotations_offset = -1; 1449 parameter_annotations_offset = -1; 1450 annotation_default_offset = -1; 1451 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 1452 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 1453 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 1454 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature()); 1455} 1456 1457Handle java_lang_reflect_Method::create(TRAPS) { 1458 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1459 klassOop klass = SystemDictionary::reflect_method_klass(); 1460 // This class is eagerly initialized during VM initialization, since we keep a refence 1461 // to one of the methods 1462 assert(instanceKlass::cast(klass)->is_initialized(), "must be initialized"); 1463 return instanceKlass::cast(klass)->allocate_instance_handle(CHECK_NH); 1464} 1465 1466oop java_lang_reflect_Method::clazz(oop reflect) { 1467 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1468 return reflect->obj_field(clazz_offset); 1469} 1470 1471void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 1472 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1473 reflect->obj_field_put(clazz_offset, value); 1474} 1475 1476int java_lang_reflect_Method::slot(oop reflect) { 1477 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1478 return reflect->int_field(slot_offset); 1479} 1480 1481void java_lang_reflect_Method::set_slot(oop reflect, int value) { 1482 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1483 reflect->int_field_put(slot_offset, value); 1484} 1485 1486oop java_lang_reflect_Method::name(oop method) { 1487 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1488 return method->obj_field(name_offset); 1489} 1490 1491void java_lang_reflect_Method::set_name(oop method, oop value) { 1492 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1493 method->obj_field_put(name_offset, value); 1494} 1495 1496oop java_lang_reflect_Method::return_type(oop method) { 1497 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1498 return method->obj_field(returnType_offset); 1499} 1500 1501void java_lang_reflect_Method::set_return_type(oop method, oop value) { 1502 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1503 method->obj_field_put(returnType_offset, value); 1504} 1505 1506oop java_lang_reflect_Method::parameter_types(oop method) { 1507 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1508 return method->obj_field(parameterTypes_offset); 1509} 1510 1511void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 1512 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1513 method->obj_field_put(parameterTypes_offset, value); 1514} 1515 1516oop java_lang_reflect_Method::exception_types(oop method) { 1517 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1518 return method->obj_field(exceptionTypes_offset); 1519} 1520 1521void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 1522 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1523 method->obj_field_put(exceptionTypes_offset, value); 1524} 1525 1526int java_lang_reflect_Method::modifiers(oop method) { 1527 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1528 return method->int_field(modifiers_offset); 1529} 1530 1531void java_lang_reflect_Method::set_modifiers(oop method, int value) { 1532 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1533 method->int_field_put(modifiers_offset, value); 1534} 1535 1536bool java_lang_reflect_Method::has_signature_field() { 1537 return (signature_offset >= 0); 1538} 1539 1540oop java_lang_reflect_Method::signature(oop method) { 1541 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1542 assert(has_signature_field(), "signature field must be present"); 1543 return method->obj_field(signature_offset); 1544} 1545 1546void java_lang_reflect_Method::set_signature(oop method, oop value) { 1547 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1548 assert(has_signature_field(), "signature field must be present"); 1549 method->obj_field_put(signature_offset, value); 1550} 1551 1552bool java_lang_reflect_Method::has_annotations_field() { 1553 return (annotations_offset >= 0); 1554} 1555 1556oop java_lang_reflect_Method::annotations(oop method) { 1557 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1558 assert(has_annotations_field(), "annotations field must be present"); 1559 return method->obj_field(annotations_offset); 1560} 1561 1562void java_lang_reflect_Method::set_annotations(oop method, oop value) { 1563 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1564 assert(has_annotations_field(), "annotations field must be present"); 1565 method->obj_field_put(annotations_offset, value); 1566} 1567 1568bool java_lang_reflect_Method::has_parameter_annotations_field() { 1569 return (parameter_annotations_offset >= 0); 1570} 1571 1572oop java_lang_reflect_Method::parameter_annotations(oop method) { 1573 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1574 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 1575 return method->obj_field(parameter_annotations_offset); 1576} 1577 1578void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 1579 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1580 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 1581 method->obj_field_put(parameter_annotations_offset, value); 1582} 1583 1584bool java_lang_reflect_Method::has_annotation_default_field() { 1585 return (annotation_default_offset >= 0); 1586} 1587 1588oop java_lang_reflect_Method::annotation_default(oop method) { 1589 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1590 assert(has_annotation_default_field(), "annotation default field must be present"); 1591 return method->obj_field(annotation_default_offset); 1592} 1593 1594void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 1595 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1596 assert(has_annotation_default_field(), "annotation default field must be present"); 1597 method->obj_field_put(annotation_default_offset, value); 1598} 1599 1600void java_lang_reflect_Constructor::compute_offsets() { 1601 klassOop k = SystemDictionary::reflect_constructor_klass(); 1602 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 1603 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 1604 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 1605 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 1606 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 1607 // The generic signature and annotations fields are only present in 1.5 1608 signature_offset = -1; 1609 annotations_offset = -1; 1610 parameter_annotations_offset = -1; 1611 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 1612 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 1613 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 1614} 1615 1616Handle java_lang_reflect_Constructor::create(TRAPS) { 1617 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1618 symbolHandle name = vmSymbolHandles::java_lang_reflect_Constructor(); 1619 klassOop k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 1620 instanceKlassHandle klass (THREAD, k); 1621 // Ensure it is initialized 1622 klass->initialize(CHECK_NH); 1623 return klass->allocate_instance_handle(CHECK_NH); 1624} 1625 1626oop java_lang_reflect_Constructor::clazz(oop reflect) { 1627 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1628 return reflect->obj_field(clazz_offset); 1629} 1630 1631void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 1632 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1633 reflect->obj_field_put(clazz_offset, value); 1634} 1635 1636oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 1637 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1638 return constructor->obj_field(parameterTypes_offset); 1639} 1640 1641void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 1642 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1643 constructor->obj_field_put(parameterTypes_offset, value); 1644} 1645 1646oop java_lang_reflect_Constructor::exception_types(oop constructor) { 1647 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1648 return constructor->obj_field(exceptionTypes_offset); 1649} 1650 1651void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 1652 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1653 constructor->obj_field_put(exceptionTypes_offset, value); 1654} 1655 1656int java_lang_reflect_Constructor::slot(oop reflect) { 1657 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1658 return reflect->int_field(slot_offset); 1659} 1660 1661void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 1662 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1663 reflect->int_field_put(slot_offset, value); 1664} 1665 1666int java_lang_reflect_Constructor::modifiers(oop constructor) { 1667 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1668 return constructor->int_field(modifiers_offset); 1669} 1670 1671void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 1672 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1673 constructor->int_field_put(modifiers_offset, value); 1674} 1675 1676bool java_lang_reflect_Constructor::has_signature_field() { 1677 return (signature_offset >= 0); 1678} 1679 1680oop java_lang_reflect_Constructor::signature(oop constructor) { 1681 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1682 assert(has_signature_field(), "signature field must be present"); 1683 return constructor->obj_field(signature_offset); 1684} 1685 1686void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 1687 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1688 assert(has_signature_field(), "signature field must be present"); 1689 constructor->obj_field_put(signature_offset, value); 1690} 1691 1692bool java_lang_reflect_Constructor::has_annotations_field() { 1693 return (annotations_offset >= 0); 1694} 1695 1696oop java_lang_reflect_Constructor::annotations(oop constructor) { 1697 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1698 assert(has_annotations_field(), "annotations field must be present"); 1699 return constructor->obj_field(annotations_offset); 1700} 1701 1702void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 1703 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1704 assert(has_annotations_field(), "annotations field must be present"); 1705 constructor->obj_field_put(annotations_offset, value); 1706} 1707 1708bool java_lang_reflect_Constructor::has_parameter_annotations_field() { 1709 return (parameter_annotations_offset >= 0); 1710} 1711 1712oop java_lang_reflect_Constructor::parameter_annotations(oop method) { 1713 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1714 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 1715 return method->obj_field(parameter_annotations_offset); 1716} 1717 1718void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 1719 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1720 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 1721 method->obj_field_put(parameter_annotations_offset, value); 1722} 1723 1724void java_lang_reflect_Field::compute_offsets() { 1725 klassOop k = SystemDictionary::reflect_field_klass(); 1726 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 1727 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1728 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature()); 1729 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 1730 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 1731 // The generic signature and annotations fields are only present in 1.5 1732 signature_offset = -1; 1733 annotations_offset = -1; 1734 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 1735 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 1736} 1737 1738Handle java_lang_reflect_Field::create(TRAPS) { 1739 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1740 symbolHandle name = vmSymbolHandles::java_lang_reflect_Field(); 1741 klassOop k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 1742 instanceKlassHandle klass (THREAD, k); 1743 // Ensure it is initialized 1744 klass->initialize(CHECK_NH); 1745 return klass->allocate_instance_handle(CHECK_NH); 1746} 1747 1748oop java_lang_reflect_Field::clazz(oop reflect) { 1749 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1750 return reflect->obj_field(clazz_offset); 1751} 1752 1753void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 1754 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1755 reflect->obj_field_put(clazz_offset, value); 1756} 1757 1758oop java_lang_reflect_Field::name(oop field) { 1759 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1760 return field->obj_field(name_offset); 1761} 1762 1763void java_lang_reflect_Field::set_name(oop field, oop value) { 1764 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1765 field->obj_field_put(name_offset, value); 1766} 1767 1768oop java_lang_reflect_Field::type(oop field) { 1769 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1770 return field->obj_field(type_offset); 1771} 1772 1773void java_lang_reflect_Field::set_type(oop field, oop value) { 1774 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1775 field->obj_field_put(type_offset, value); 1776} 1777 1778int java_lang_reflect_Field::slot(oop reflect) { 1779 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1780 return reflect->int_field(slot_offset); 1781} 1782 1783void java_lang_reflect_Field::set_slot(oop reflect, int value) { 1784 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1785 reflect->int_field_put(slot_offset, value); 1786} 1787 1788int java_lang_reflect_Field::modifiers(oop field) { 1789 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1790 return field->int_field(modifiers_offset); 1791} 1792 1793void java_lang_reflect_Field::set_modifiers(oop field, int value) { 1794 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1795 field->int_field_put(modifiers_offset, value); 1796} 1797 1798bool java_lang_reflect_Field::has_signature_field() { 1799 return (signature_offset >= 0); 1800} 1801 1802oop java_lang_reflect_Field::signature(oop field) { 1803 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1804 assert(has_signature_field(), "signature field must be present"); 1805 return field->obj_field(signature_offset); 1806} 1807 1808void java_lang_reflect_Field::set_signature(oop field, oop value) { 1809 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1810 assert(has_signature_field(), "signature field must be present"); 1811 field->obj_field_put(signature_offset, value); 1812} 1813 1814bool java_lang_reflect_Field::has_annotations_field() { 1815 return (annotations_offset >= 0); 1816} 1817 1818oop java_lang_reflect_Field::annotations(oop field) { 1819 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1820 assert(has_annotations_field(), "annotations field must be present"); 1821 return field->obj_field(annotations_offset); 1822} 1823 1824void java_lang_reflect_Field::set_annotations(oop field, oop value) { 1825 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1826 assert(has_annotations_field(), "annotations field must be present"); 1827 field->obj_field_put(annotations_offset, value); 1828} 1829 1830 1831void sun_reflect_ConstantPool::compute_offsets() { 1832 klassOop k = SystemDictionary::reflect_constant_pool_klass(); 1833 // This null test can be removed post beta 1834 if (k != NULL) { 1835 compute_offset(_cp_oop_offset, k, vmSymbols::constantPoolOop_name(), vmSymbols::object_signature()); 1836 } 1837} 1838 1839 1840Handle sun_reflect_ConstantPool::create(TRAPS) { 1841 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1842 klassOop k = SystemDictionary::reflect_constant_pool_klass(); 1843 instanceKlassHandle klass (THREAD, k); 1844 // Ensure it is initialized 1845 klass->initialize(CHECK_NH); 1846 return klass->allocate_instance_handle(CHECK_NH); 1847} 1848 1849 1850oop sun_reflect_ConstantPool::cp_oop(oop reflect) { 1851 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1852 return reflect->obj_field(_cp_oop_offset); 1853} 1854 1855 1856void sun_reflect_ConstantPool::set_cp_oop(oop reflect, oop value) { 1857 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1858 reflect->obj_field_put(_cp_oop_offset, value); 1859} 1860 1861void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() { 1862 klassOop k = SystemDictionary::reflect_unsafe_static_field_accessor_impl_klass(); 1863 // This null test can be removed post beta 1864 if (k != NULL) { 1865 compute_offset(_base_offset, k, 1866 vmSymbols::base_name(), vmSymbols::object_signature()); 1867 } 1868} 1869 1870oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 1871 klassOop k = SystemDictionary::box_klass(type); 1872 if (k == NULL) return NULL; 1873 instanceKlassHandle h (THREAD, k); 1874 if (!h->is_initialized()) h->initialize(CHECK_0); 1875 return h->allocate_instance(THREAD); 1876} 1877 1878 1879oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 1880 oop box = initialize_and_allocate(type, CHECK_0); 1881 if (box == NULL) return NULL; 1882 switch (type) { 1883 case T_BOOLEAN: 1884 box->bool_field_put(value_offset, value->z); 1885 break; 1886 case T_CHAR: 1887 box->char_field_put(value_offset, value->c); 1888 break; 1889 case T_FLOAT: 1890 box->float_field_put(value_offset, value->f); 1891 break; 1892 case T_DOUBLE: 1893 box->double_field_put(long_value_offset, value->d); 1894 break; 1895 case T_BYTE: 1896 box->byte_field_put(value_offset, value->b); 1897 break; 1898 case T_SHORT: 1899 box->short_field_put(value_offset, value->s); 1900 break; 1901 case T_INT: 1902 box->int_field_put(value_offset, value->i); 1903 break; 1904 case T_LONG: 1905 box->long_field_put(long_value_offset, value->j); 1906 break; 1907 default: 1908 return NULL; 1909 } 1910 return box; 1911} 1912 1913 1914BasicType java_lang_boxing_object::basic_type(oop box) { 1915 if (box == NULL) return T_ILLEGAL; 1916 BasicType type = SystemDictionary::box_klass_type(box->klass()); 1917 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 1918 return T_ILLEGAL; 1919 return type; 1920} 1921 1922 1923BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 1924 BasicType type = SystemDictionary::box_klass_type(box->klass()); 1925 switch (type) { 1926 case T_BOOLEAN: 1927 value->z = box->bool_field(value_offset); 1928 break; 1929 case T_CHAR: 1930 value->c = box->char_field(value_offset); 1931 break; 1932 case T_FLOAT: 1933 value->f = box->float_field(value_offset); 1934 break; 1935 case T_DOUBLE: 1936 value->d = box->double_field(long_value_offset); 1937 break; 1938 case T_BYTE: 1939 value->b = box->byte_field(value_offset); 1940 break; 1941 case T_SHORT: 1942 value->s = box->short_field(value_offset); 1943 break; 1944 case T_INT: 1945 value->i = box->int_field(value_offset); 1946 break; 1947 case T_LONG: 1948 value->j = box->long_field(long_value_offset); 1949 break; 1950 default: 1951 return T_ILLEGAL; 1952 } // end switch 1953 return type; 1954} 1955 1956 1957BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 1958 BasicType type = SystemDictionary::box_klass_type(box->klass()); 1959 switch (type) { 1960 case T_BOOLEAN: 1961 box->bool_field_put(value_offset, value->z); 1962 break; 1963 case T_CHAR: 1964 box->char_field_put(value_offset, value->c); 1965 break; 1966 case T_FLOAT: 1967 box->float_field_put(value_offset, value->f); 1968 break; 1969 case T_DOUBLE: 1970 box->double_field_put(long_value_offset, value->d); 1971 break; 1972 case T_BYTE: 1973 box->byte_field_put(value_offset, value->b); 1974 break; 1975 case T_SHORT: 1976 box->short_field_put(value_offset, value->s); 1977 break; 1978 case T_INT: 1979 box->int_field_put(value_offset, value->i); 1980 break; 1981 case T_LONG: 1982 box->long_field_put(long_value_offset, value->j); 1983 break; 1984 default: 1985 return T_ILLEGAL; 1986 } // end switch 1987 return type; 1988} 1989 1990 1991// Support for java_lang_ref_Reference 1992oop java_lang_ref_Reference::pending_list_lock() { 1993 instanceKlass* ik = instanceKlass::cast(SystemDictionary::reference_klass()); 1994 char *addr = (((char *)ik->start_of_static_fields()) + static_lock_offset); 1995 if (UseCompressedOops) { 1996 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 1997 } else { 1998 return oopDesc::load_decode_heap_oop((oop*)addr); 1999 } 2000} 2001 2002HeapWord *java_lang_ref_Reference::pending_list_addr() { 2003 instanceKlass* ik = instanceKlass::cast(SystemDictionary::reference_klass()); 2004 char *addr = (((char *)ik->start_of_static_fields()) + static_pending_offset); 2005 // XXX This might not be HeapWord aligned, almost rather be char *. 2006 return (HeapWord*)addr; 2007} 2008 2009oop java_lang_ref_Reference::pending_list() { 2010 char *addr = (char *)pending_list_addr(); 2011 if (UseCompressedOops) { 2012 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 2013 } else { 2014 return oopDesc::load_decode_heap_oop((oop*)addr); 2015 } 2016} 2017 2018 2019// Support for java_lang_ref_SoftReference 2020 2021jlong java_lang_ref_SoftReference::timestamp(oop ref) { 2022 return ref->long_field(timestamp_offset); 2023} 2024 2025jlong java_lang_ref_SoftReference::clock() { 2026 instanceKlass* ik = instanceKlass::cast(SystemDictionary::soft_reference_klass()); 2027 int offset = ik->offset_of_static_fields() + static_clock_offset; 2028 2029 return SystemDictionary::soft_reference_klass()->long_field(offset); 2030} 2031 2032void java_lang_ref_SoftReference::set_clock(jlong value) { 2033 instanceKlass* ik = instanceKlass::cast(SystemDictionary::soft_reference_klass()); 2034 int offset = ik->offset_of_static_fields() + static_clock_offset; 2035 2036 SystemDictionary::soft_reference_klass()->long_field_put(offset, value); 2037} 2038 2039 2040// Support for java_security_AccessControlContext 2041 2042int java_security_AccessControlContext::_context_offset = 0; 2043int java_security_AccessControlContext::_privilegedContext_offset = 0; 2044int java_security_AccessControlContext::_isPrivileged_offset = 0; 2045 2046 2047void java_security_AccessControlContext::compute_offsets() { 2048 assert(_isPrivileged_offset == 0, "offsets should be initialized only once"); 2049 fieldDescriptor fd; 2050 instanceKlass* ik = instanceKlass::cast(SystemDictionary::AccessControlContext_klass()); 2051 2052 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) { 2053 fatal("Invalid layout of java.security.AccessControlContext"); 2054 } 2055 _context_offset = fd.offset(); 2056 2057 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) { 2058 fatal("Invalid layout of java.security.AccessControlContext"); 2059 } 2060 _privilegedContext_offset = fd.offset(); 2061 2062 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) { 2063 fatal("Invalid layout of java.security.AccessControlContext"); 2064 } 2065 _isPrivileged_offset = fd.offset(); 2066} 2067 2068 2069oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) { 2070 assert(_isPrivileged_offset != 0, "offsets should have been initialized"); 2071 // Ensure klass is initialized 2072 instanceKlass::cast(SystemDictionary::AccessControlContext_klass())->initialize(CHECK_0); 2073 // Allocate result 2074 oop result = instanceKlass::cast(SystemDictionary::AccessControlContext_klass())->allocate_instance(CHECK_0); 2075 // Fill in values 2076 result->obj_field_put(_context_offset, context()); 2077 result->obj_field_put(_privilegedContext_offset, privileged_context()); 2078 result->bool_field_put(_isPrivileged_offset, isPrivileged); 2079 return result; 2080} 2081 2082 2083// Support for java_lang_ClassLoader 2084 2085oop java_lang_ClassLoader::parent(oop loader) { 2086 assert(loader->is_oop(), "loader must be oop"); 2087 return loader->obj_field(parent_offset); 2088} 2089 2090 2091bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 2092 // Fix for 4474172; see evaluation for more details 2093 loader = non_reflection_class_loader(loader); 2094 2095 oop cl = SystemDictionary::java_system_loader(); 2096 while(cl != NULL) { 2097 if (cl == loader) return true; 2098 cl = parent(cl); 2099 } 2100 return false; 2101} 2102 2103oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) { 2104 if (loader != NULL) { 2105 // See whether this is one of the class loaders associated with 2106 // the generated bytecodes for reflection, and if so, "magically" 2107 // delegate to its parent to prevent class loading from occurring 2108 // in places where applications using reflection didn't expect it. 2109 klassOop delegating_cl_class = SystemDictionary::reflect_delegating_classloader_klass(); 2110 // This might be null in non-1.4 JDKs 2111 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) { 2112 return parent(loader); 2113 } 2114 } 2115 return loader; 2116} 2117 2118 2119// Support for java_lang_System 2120 2121void java_lang_System::compute_offsets() { 2122 assert(offset_of_static_fields == 0, "offsets should be initialized only once"); 2123 2124 instanceKlass* ik = instanceKlass::cast(SystemDictionary::system_klass()); 2125 offset_of_static_fields = ik->offset_of_static_fields(); 2126} 2127 2128int java_lang_System::in_offset_in_bytes() { 2129 return (offset_of_static_fields + static_in_offset); 2130} 2131 2132 2133int java_lang_System::out_offset_in_bytes() { 2134 return (offset_of_static_fields + static_out_offset); 2135} 2136 2137 2138int java_lang_System::err_offset_in_bytes() { 2139 return (offset_of_static_fields + static_err_offset); 2140} 2141 2142 2143 2144int java_lang_String::value_offset; 2145int java_lang_String::offset_offset; 2146int java_lang_String::count_offset; 2147int java_lang_String::hash_offset; 2148int java_lang_Class::klass_offset; 2149int java_lang_Class::array_klass_offset; 2150int java_lang_Class::resolved_constructor_offset; 2151int java_lang_Class::number_of_fake_oop_fields; 2152int java_lang_Throwable::backtrace_offset; 2153int java_lang_Throwable::detailMessage_offset; 2154int java_lang_Throwable::cause_offset; 2155int java_lang_Throwable::stackTrace_offset; 2156int java_lang_reflect_AccessibleObject::override_offset; 2157int java_lang_reflect_Method::clazz_offset; 2158int java_lang_reflect_Method::name_offset; 2159int java_lang_reflect_Method::returnType_offset; 2160int java_lang_reflect_Method::parameterTypes_offset; 2161int java_lang_reflect_Method::exceptionTypes_offset; 2162int java_lang_reflect_Method::slot_offset; 2163int java_lang_reflect_Method::modifiers_offset; 2164int java_lang_reflect_Method::signature_offset; 2165int java_lang_reflect_Method::annotations_offset; 2166int java_lang_reflect_Method::parameter_annotations_offset; 2167int java_lang_reflect_Method::annotation_default_offset; 2168int java_lang_reflect_Constructor::clazz_offset; 2169int java_lang_reflect_Constructor::parameterTypes_offset; 2170int java_lang_reflect_Constructor::exceptionTypes_offset; 2171int java_lang_reflect_Constructor::slot_offset; 2172int java_lang_reflect_Constructor::modifiers_offset; 2173int java_lang_reflect_Constructor::signature_offset; 2174int java_lang_reflect_Constructor::annotations_offset; 2175int java_lang_reflect_Constructor::parameter_annotations_offset; 2176int java_lang_reflect_Field::clazz_offset; 2177int java_lang_reflect_Field::name_offset; 2178int java_lang_reflect_Field::type_offset; 2179int java_lang_reflect_Field::slot_offset; 2180int java_lang_reflect_Field::modifiers_offset; 2181int java_lang_reflect_Field::signature_offset; 2182int java_lang_reflect_Field::annotations_offset; 2183int java_lang_boxing_object::value_offset; 2184int java_lang_boxing_object::long_value_offset; 2185int java_lang_ref_Reference::referent_offset; 2186int java_lang_ref_Reference::queue_offset; 2187int java_lang_ref_Reference::next_offset; 2188int java_lang_ref_Reference::discovered_offset; 2189int java_lang_ref_Reference::static_lock_offset; 2190int java_lang_ref_Reference::static_pending_offset; 2191int java_lang_ref_Reference::number_of_fake_oop_fields; 2192int java_lang_ref_SoftReference::timestamp_offset; 2193int java_lang_ref_SoftReference::static_clock_offset; 2194int java_lang_ClassLoader::parent_offset; 2195int java_lang_System::offset_of_static_fields; 2196int java_lang_System::static_in_offset; 2197int java_lang_System::static_out_offset; 2198int java_lang_System::static_err_offset; 2199int java_lang_StackTraceElement::declaringClass_offset; 2200int java_lang_StackTraceElement::methodName_offset; 2201int java_lang_StackTraceElement::fileName_offset; 2202int java_lang_StackTraceElement::lineNumber_offset; 2203int java_lang_AssertionStatusDirectives::classes_offset; 2204int java_lang_AssertionStatusDirectives::classEnabled_offset; 2205int java_lang_AssertionStatusDirectives::packages_offset; 2206int java_lang_AssertionStatusDirectives::packageEnabled_offset; 2207int java_lang_AssertionStatusDirectives::deflt_offset; 2208int java_nio_Buffer::_limit_offset; 2209int sun_misc_AtomicLongCSImpl::_value_offset; 2210int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0; 2211int sun_reflect_ConstantPool::_cp_oop_offset; 2212int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset; 2213 2214 2215// Support for java_lang_StackTraceElement 2216 2217void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 2218 element->obj_field_put(fileName_offset, value); 2219} 2220 2221void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 2222 element->obj_field_put(declaringClass_offset, value); 2223} 2224 2225void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 2226 element->obj_field_put(methodName_offset, value); 2227} 2228 2229void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 2230 element->int_field_put(lineNumber_offset, value); 2231} 2232 2233 2234// Support for java Assertions - java_lang_AssertionStatusDirectives. 2235 2236void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 2237 o->obj_field_put(classes_offset, val); 2238} 2239 2240void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 2241 o->obj_field_put(classEnabled_offset, val); 2242} 2243 2244void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 2245 o->obj_field_put(packages_offset, val); 2246} 2247 2248void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 2249 o->obj_field_put(packageEnabled_offset, val); 2250} 2251 2252void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 2253 o->bool_field_put(deflt_offset, val); 2254} 2255 2256 2257// Support for intrinsification of java.nio.Buffer.checkIndex 2258int java_nio_Buffer::limit_offset() { 2259 return _limit_offset; 2260} 2261 2262 2263void java_nio_Buffer::compute_offsets() { 2264 klassOop k = SystemDictionary::java_nio_Buffer_klass(); 2265 assert(k != NULL, "must be loaded in 1.4+"); 2266 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature()); 2267} 2268 2269// Support for intrinsification of sun.misc.AtomicLongCSImpl.attemptUpdate 2270int sun_misc_AtomicLongCSImpl::value_offset() { 2271 assert(SystemDictionary::sun_misc_AtomicLongCSImpl_klass() != NULL, "can't call this"); 2272 return _value_offset; 2273} 2274 2275 2276void sun_misc_AtomicLongCSImpl::compute_offsets() { 2277 klassOop k = SystemDictionary::sun_misc_AtomicLongCSImpl_klass(); 2278 // If this class is not present, its value field offset won't be referenced. 2279 if (k != NULL) { 2280 compute_offset(_value_offset, k, vmSymbols::value_name(), vmSymbols::long_signature()); 2281 } 2282} 2283 2284void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) { 2285 if (_owner_offset != 0) return; 2286 2287 assert(JDK_Version::is_gte_jdk16x_version(), "Must be JDK 1.6 or later"); 2288 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK); 2289 klassOop k = SystemDictionary::abstract_ownable_synchronizer_klass(); 2290 compute_offset(_owner_offset, k, 2291 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature()); 2292} 2293 2294oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 2295 assert(_owner_offset != 0, "Must be initialized"); 2296 return obj->obj_field(_owner_offset); 2297} 2298 2299// Compute hard-coded offsets 2300// Invoked before SystemDictionary::initialize, so pre-loaded classes 2301// are not available to determine the offset_of_static_fields. 2302void JavaClasses::compute_hard_coded_offsets() { 2303 const int x = heapOopSize; 2304 const int header = instanceOopDesc::base_offset_in_bytes(); 2305 2306 // Do the String Class 2307 java_lang_String::value_offset = java_lang_String::hc_value_offset * x + header; 2308 java_lang_String::offset_offset = java_lang_String::hc_offset_offset * x + header; 2309 java_lang_String::count_offset = java_lang_String::offset_offset + sizeof (jint); 2310 java_lang_String::hash_offset = java_lang_String::count_offset + sizeof (jint); 2311 2312 // Do the Class Class 2313 java_lang_Class::klass_offset = java_lang_Class::hc_klass_offset * x + header; 2314 java_lang_Class::array_klass_offset = java_lang_Class::hc_array_klass_offset * x + header; 2315 java_lang_Class::resolved_constructor_offset = java_lang_Class::hc_resolved_constructor_offset * x + header; 2316 2317 // This is NOT an offset 2318 java_lang_Class::number_of_fake_oop_fields = java_lang_Class::hc_number_of_fake_oop_fields; 2319 2320 // Throwable Class 2321 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header; 2322 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header; 2323 java_lang_Throwable::cause_offset = java_lang_Throwable::hc_cause_offset * x + header; 2324 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header; 2325 2326 // java_lang_boxing_object 2327 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header; 2328 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong); 2329 2330 // java_lang_ref_Reference: 2331 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header; 2332 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header; 2333 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header; 2334 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header; 2335 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x; 2336 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x; 2337 // Artificial fields for java_lang_ref_Reference 2338 // The first field is for the discovered field added in 1.4 2339 java_lang_ref_Reference::number_of_fake_oop_fields = 1; 2340 2341 // java_lang_ref_SoftReference Class 2342 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong); 2343 // Don't multiply static fields because they are always in wordSize units 2344 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x; 2345 2346 // java_lang_ClassLoader 2347 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header; 2348 2349 // java_lang_System 2350 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x; 2351 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x; 2352 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x; 2353 2354 // java_lang_StackTraceElement 2355 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header; 2356 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header; 2357 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header; 2358 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header; 2359 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header; 2360 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header; 2361 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header; 2362 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header; 2363 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header; 2364 2365} 2366 2367 2368// Compute non-hard-coded field offsets of all the classes in this file 2369void JavaClasses::compute_offsets() { 2370 2371 java_lang_Class::compute_offsets(); 2372 java_lang_System::compute_offsets(); 2373 java_lang_Thread::compute_offsets(); 2374 java_lang_ThreadGroup::compute_offsets(); 2375 java_security_AccessControlContext::compute_offsets(); 2376 // Initialize reflection classes. The layouts of these classes 2377 // changed with the new reflection implementation in JDK 1.4, and 2378 // since the Universe doesn't know what JDK version it is until this 2379 // point we defer computation of these offsets until now. 2380 java_lang_reflect_AccessibleObject::compute_offsets(); 2381 java_lang_reflect_Method::compute_offsets(); 2382 java_lang_reflect_Constructor::compute_offsets(); 2383 java_lang_reflect_Field::compute_offsets(); 2384 if (JDK_Version::is_gte_jdk14x_version()) { 2385 java_nio_Buffer::compute_offsets(); 2386 } 2387 if (JDK_Version::is_gte_jdk15x_version()) { 2388 sun_reflect_ConstantPool::compute_offsets(); 2389 sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets(); 2390 } 2391 sun_misc_AtomicLongCSImpl::compute_offsets(); 2392} 2393 2394#ifndef PRODUCT 2395 2396// These functions exist to assert the validity of hard-coded field offsets to guard 2397// against changes in the class files 2398 2399bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 2400 EXCEPTION_MARK; 2401 fieldDescriptor fd; 2402 symbolHandle klass_sym = oopFactory::new_symbol_handle(klass_name, CATCH); 2403 klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 2404 instanceKlassHandle h_klass (THREAD, k); 2405 //instanceKlassHandle h_klass(klass); 2406 symbolHandle f_name = oopFactory::new_symbol_handle(field_name, CATCH); 2407 symbolHandle f_sig = oopFactory::new_symbol_handle(field_sig, CATCH); 2408 if (!h_klass->find_local_field(f_name(), f_sig(), &fd)) { 2409 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 2410 return false; 2411 } 2412 if (fd.is_static()) { 2413 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 2414 return false; 2415 } 2416 if (fd.offset() == hardcoded_offset ) { 2417 return true; 2418 } else { 2419 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.", 2420 klass_name, field_name, hardcoded_offset, fd.offset()); 2421 return false; 2422 } 2423} 2424 2425 2426bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 2427 EXCEPTION_MARK; 2428 fieldDescriptor fd; 2429 symbolHandle klass_sym = oopFactory::new_symbol_handle(klass_name, CATCH); 2430 klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 2431 instanceKlassHandle h_klass (THREAD, k); 2432 symbolHandle f_name = oopFactory::new_symbol_handle(field_name, CATCH); 2433 symbolHandle f_sig = oopFactory::new_symbol_handle(field_sig, CATCH); 2434 if (!h_klass->find_local_field(f_name(), f_sig(), &fd)) { 2435 tty->print_cr("Static field %s.%s not found", klass_name, field_name); 2436 return false; 2437 } 2438 if (!fd.is_static()) { 2439 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name); 2440 return false; 2441 } 2442 if (fd.offset() == hardcoded_offset + h_klass->offset_of_static_fields()) { 2443 return true; 2444 } else { 2445 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()); 2446 return false; 2447 } 2448} 2449 2450 2451bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) { 2452 EXCEPTION_MARK; 2453 fieldDescriptor fd; 2454 symbolHandle klass_sym = oopFactory::new_symbol_handle(klass_name, CATCH); 2455 klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 2456 instanceKlassHandle h_klass (THREAD, k); 2457 symbolHandle f_name = oopFactory::new_symbol_handle(field_name, CATCH); 2458 symbolHandle f_sig = oopFactory::new_symbol_handle(field_sig, CATCH); 2459 if (!h_klass->find_local_field(f_name(), f_sig(), &fd)) { 2460 tty->print_cr("Static field %s.%s not found", klass_name, field_name); 2461 return false; 2462 } 2463 if (!fd.is_static() || !fd.has_initial_value()) { 2464 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name); 2465 return false; 2466 } 2467 if (!fd.initial_value_tag().is_int()) { 2468 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name); 2469 return false; 2470 } 2471 jint field_value = fd.int_initial_value(); 2472 if (field_value == hardcoded_constant) { 2473 return true; 2474 } else { 2475 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); 2476 return false; 2477 } 2478} 2479 2480 2481// Check the hard-coded field offsets of all the classes in this file 2482 2483void JavaClasses::check_offsets() { 2484 bool valid = true; 2485 2486#define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 2487 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig) 2488 2489#define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 2490 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig) 2491 2492#define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 2493 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig) 2494 2495#define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \ 2496 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig) 2497 2498 // java.lang.String 2499 2500 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C"); 2501 CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I"); 2502 CHECK_OFFSET("java/lang/String", java_lang_String, count, "I"); 2503 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I"); 2504 2505 // java.lang.Class 2506 2507 // Fake fields 2508 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked 2509 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked 2510 // CHECK_OFFSET("java/lang/Class", java_lang_Class, resolved_constructor); // %%% this needs to be checked 2511 2512 // java.lang.Throwable 2513 2514 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;"); 2515 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;"); 2516 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;"); 2517 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;"); 2518 2519 // Boxed primitive objects (java_lang_boxing_object) 2520 2521 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 2522 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 2523 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 2524 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 2525 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 2526 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 2527 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 2528 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 2529 2530 // java.lang.ClassLoader 2531 2532 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;"); 2533 2534 // java.lang.System 2535 2536 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;"); 2537 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;"); 2538 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;"); 2539 2540 // java.lang.StackTraceElement 2541 2542 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;"); 2543 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;"); 2544 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;"); 2545 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I"); 2546 2547 // java.lang.ref.Reference 2548 2549 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;"); 2550 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;"); 2551 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;"); 2552 // Fake field 2553 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;"); 2554 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;"); 2555 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;"); 2556 2557 // java.lang.ref.SoftReference 2558 2559 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J"); 2560 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J"); 2561 2562 // java.lang.AssertionStatusDirectives 2563 // 2564 // The CheckAssertionStatusDirectives boolean can be removed from here and 2565 // globals.hpp after the AssertionStatusDirectives class has been integrated 2566 // into merlin "for some time." Without it, the vm will fail with early 2567 // merlin builds. 2568 2569 if (CheckAssertionStatusDirectives && JDK_Version::is_gte_jdk14x_version()) { 2570 const char* nm = "java/lang/AssertionStatusDirectives"; 2571 const char* sig = "[Ljava/lang/String;"; 2572 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig); 2573 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z"); 2574 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig); 2575 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z"); 2576 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z"); 2577 } 2578 2579 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed"); 2580} 2581 2582#endif // PRODUCT 2583 2584void javaClasses_init() { 2585 JavaClasses::compute_offsets(); 2586 JavaClasses::check_offsets(); 2587 FilteredFieldsMap::initialize(); // must be done after computing offsets. 2588} 2589