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 static bool find_field(instanceKlass* ik, 29 symbolOop name_symbol, symbolOop signature_symbol, 30 fieldDescriptor* fd, 31 bool allow_super = false) { 32 if (allow_super) 33 return ik->find_field(name_symbol, signature_symbol, fd) != NULL; 34 else 35 return ik->find_local_field(name_symbol, signature_symbol, fd); 36 } 37 38 // Helpful routine for computing field offsets at run time rather than hardcoding them 39 static void 40 compute_offset(int &dest_offset, 41 klassOop klass_oop, symbolOop name_symbol, symbolOop signature_symbol, 42 bool allow_super = false) { 43 fieldDescriptor fd; 44 instanceKlass* ik = instanceKlass::cast(klass_oop); 45 if (!find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) { 46 ResourceMark rm; 47 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string()); 48 fatal("Invalid layout of preloaded class"); 49 } 50 dest_offset = fd.offset(); 51 } 52 53 // Same as above but for "optional" offsets that might not be present in certain JDK versions 54 static void 55 compute_optional_offset(int& dest_offset, 56 klassOop klass_oop, symbolOop name_symbol, symbolOop signature_symbol, 57 bool allow_super = false) { 58 fieldDescriptor fd; 59 instanceKlass* ik = instanceKlass::cast(klass_oop); 60 if (find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) { 61 dest_offset = fd.offset(); 62 } 63 } 64 65 66 Handle java_lang_String::basic_create(int length, bool tenured, TRAPS) { 67 // Create the String object first, so there's a chance that the String 68 // and the char array it points to end up in the same cache line. 69 oop obj; 70 if (tenured) { 71 obj = instanceKlass::cast(SystemDictionary::string_klass())->allocate_permanent_instance(CHECK_NH); 72 } else { 73 obj = instanceKlass::cast(SystemDictionary::string_klass())->allocate_instance(CHECK_NH); 74 } 75 76 // Create the char array. The String object must be handlized here 77 // because GC can happen as a result of the allocation attempt. 78 Handle h_obj(THREAD, obj); 79 typeArrayOop buffer; 80 if (tenured) { 81 buffer = oopFactory::new_permanent_charArray(length, CHECK_NH); 82 } else { 83 buffer = oopFactory::new_charArray(length, CHECK_NH); 84 } 85 86 // Point the String at the char array 87 obj = h_obj(); 88 set_value(obj, buffer); 89 // No need to zero the offset, allocation zero'ed the entire String object 90 assert(offset(obj) == 0, "initial String offset should be zero"); 91 //set_offset(obj, 0); 92 set_count(obj, length); 93 94 return h_obj; 95 } 96 97 Handle java_lang_String::basic_create_from_unicode(jchar* unicode, int length, bool tenured, TRAPS) { 98 Handle h_obj = basic_create(length, tenured, CHECK_NH); 99 typeArrayOop buffer = value(h_obj()); 100 for (int index = 0; index < length; index++) { 101 buffer->char_at_put(index, unicode[index]); 102 } 103 return h_obj; 104 } 105 106 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) { 107 return basic_create_from_unicode(unicode, length, false, CHECK_NH); 108 } 109 110 Handle java_lang_String::create_tenured_from_unicode(jchar* unicode, int length, TRAPS) { 111 return basic_create_from_unicode(unicode, length, true, CHECK_NH); 112 } 113 114 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) { 115 Handle h_obj = basic_create_from_unicode(unicode, length, false, CHECK_0); 116 return h_obj(); 117 } 118 119 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) { 120 if (utf8_str == NULL) { 121 return Handle(); 122 } 123 int length = UTF8::unicode_length(utf8_str); 124 Handle h_obj = basic_create(length, false, CHECK_NH); 125 if (length > 0) { 126 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 127 } 128 return h_obj; 129 } 130 131 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) { 132 Handle h_obj = create_from_str(utf8_str, CHECK_0); 133 return h_obj(); 134 } 135 136 Handle java_lang_String::create_from_symbol(symbolHandle symbol, TRAPS) { 137 int length = UTF8::unicode_length((char*)symbol->bytes(), symbol->utf8_length()); 138 Handle h_obj = basic_create(length, false, CHECK_NH); 139 if (length > 0) { 140 UTF8::convert_to_unicode((char*)symbol->bytes(), value(h_obj())->char_at_addr(0), length); 141 } 142 return h_obj; 143 } 144 145 // Converts a C string to a Java String based on current encoding 146 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) { 147 assert(str != NULL, "bad arguments"); 148 149 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *); 150 static to_java_string_fn_t _to_java_string_fn = NULL; 151 152 if (_to_java_string_fn == NULL) { 153 void *lib_handle = os::native_java_library(); 154 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, hpi::dll_lookup(lib_handle, "NewStringPlatform")); 155 if (_to_java_string_fn == NULL) { 156 fatal("NewStringPlatform missing"); 157 } 158 } 159 160 jstring js = NULL; 161 { JavaThread* thread = (JavaThread*)THREAD; 162 assert(thread->is_Java_thread(), "must be java thread"); 163 HandleMark hm(thread); 164 ThreadToNativeFromVM ttn(thread); 165 js = (_to_java_string_fn)(thread->jni_environment(), str); 166 } 167 return Handle(THREAD, JNIHandles::resolve(js)); 168 } 169 170 // Converts a Java String to a native C string that can be used for 171 // native OS calls. 172 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) { 173 174 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*); 175 static to_platform_string_fn_t _to_platform_string_fn = NULL; 176 177 if (_to_platform_string_fn == NULL) { 178 void *lib_handle = os::native_java_library(); 179 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, hpi::dll_lookup(lib_handle, "GetStringPlatformChars")); 180 if (_to_platform_string_fn == NULL) { 181 fatal("GetStringPlatformChars missing"); 182 } 183 } 184 185 char *native_platform_string; 186 { JavaThread* thread = (JavaThread*)THREAD; 187 assert(thread->is_Java_thread(), "must be java thread"); 188 JNIEnv *env = thread->jni_environment(); 189 jstring js = (jstring) JNIHandles::make_local(env, java_string()); 190 bool is_copy; 191 HandleMark hm(thread); 192 ThreadToNativeFromVM ttn(thread); 193 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy); 194 assert(is_copy == JNI_TRUE, "is_copy value changed"); 195 JNIHandles::destroy_local(js); 196 } 197 return native_platform_string; 198 } 199 200 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) { 201 oop obj = java_string(); 202 // Typical usage is to convert all '/' to '.' in string. 203 typeArrayOop value = java_lang_String::value(obj); 204 int offset = java_lang_String::offset(obj); 205 int length = java_lang_String::length(obj); 206 207 // First check if any from_char exist 208 int index; // Declared outside, used later 209 for (index = 0; index < length; index++) { 210 if (value->char_at(index + offset) == from_char) { 211 break; 212 } 213 } 214 if (index == length) { 215 // No from_char, so do not copy. 216 return java_string; 217 } 218 219 // Create new UNICODE buffer. Must handlize value because GC 220 // may happen during String and char array creation. 221 typeArrayHandle h_value(THREAD, value); 222 Handle string = basic_create(length, false, CHECK_NH); 223 224 typeArrayOop from_buffer = h_value(); 225 typeArrayOop to_buffer = java_lang_String::value(string()); 226 227 // Copy contents 228 for (index = 0; index < length; index++) { 229 jchar c = from_buffer->char_at(index + offset); 230 if (c == from_char) { 231 c = to_char; 232 } 233 to_buffer->char_at_put(index, c); 234 } 235 return string; 236 } 237 238 jchar* java_lang_String::as_unicode_string(oop java_string, int& length) { 239 typeArrayOop value = java_lang_String::value(java_string); 240 int offset = java_lang_String::offset(java_string); 241 length = java_lang_String::length(java_string); 242 243 jchar* result = NEW_RESOURCE_ARRAY(jchar, length); 244 for (int index = 0; index < length; index++) { 245 result[index] = value->char_at(index + offset); 246 } 247 return result; 248 } 249 250 symbolHandle java_lang_String::as_symbol(Handle java_string, TRAPS) { 251 oop obj = java_string(); 252 typeArrayOop value = java_lang_String::value(obj); 253 int offset = java_lang_String::offset(obj); 254 int length = java_lang_String::length(obj); 255 jchar* base = value->char_at_addr(offset); 256 symbolOop sym = SymbolTable::lookup_unicode(base, length, THREAD); 257 return symbolHandle(THREAD, sym); 258 } 259 260 symbolOop java_lang_String::as_symbol_or_null(oop java_string) { 261 typeArrayOop value = java_lang_String::value(java_string); 262 int offset = java_lang_String::offset(java_string); 263 int length = java_lang_String::length(java_string); 264 jchar* base = value->char_at_addr(offset); 265 return SymbolTable::probe_unicode(base, length); 266 } 267 268 269 int java_lang_String::utf8_length(oop java_string) { 270 typeArrayOop value = java_lang_String::value(java_string); 271 int offset = java_lang_String::offset(java_string); 272 int length = java_lang_String::length(java_string); 273 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset); 274 return UNICODE::utf8_length(position, length); 275 } 276 277 char* java_lang_String::as_utf8_string(oop java_string) { 278 typeArrayOop value = java_lang_String::value(java_string); 279 int offset = java_lang_String::offset(java_string); 280 int length = java_lang_String::length(java_string); 281 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset); 282 return UNICODE::as_utf8(position, length); 283 } 284 285 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) { 286 typeArrayOop value = java_lang_String::value(java_string); 287 int offset = java_lang_String::offset(java_string); 288 int length = java_lang_String::length(java_string); 289 assert(start + len <= length, "just checking"); 290 jchar* position = value->char_at_addr(offset + start); 291 return UNICODE::as_utf8(position, len); 292 } 293 294 bool java_lang_String::equals(oop java_string, jchar* chars, int len) { 295 assert(SharedSkipVerify || 296 java_string->klass() == SystemDictionary::string_klass(), 297 "must be java_string"); 298 typeArrayOop value = java_lang_String::value(java_string); 299 int offset = java_lang_String::offset(java_string); 300 int length = java_lang_String::length(java_string); 301 if (length != len) { 302 return false; 303 } 304 for (int i = 0; i < len; i++) { 305 if (value->char_at(i + offset) != chars[i]) { 306 return false; 307 } 308 } 309 return true; 310 } 311 312 void java_lang_String::print(Handle java_string, outputStream* st) { 313 oop obj = java_string(); 314 assert(obj->klass() == SystemDictionary::string_klass(), "must be java_string"); 315 typeArrayOop value = java_lang_String::value(obj); 316 int offset = java_lang_String::offset(obj); 317 int length = java_lang_String::length(obj); 318 319 int end = MIN2(length, 100); 320 if (value == NULL) { 321 // This can happen if, e.g., printing a String 322 // object before its initializer has been called 323 st->print_cr("NULL"); 324 } else { 325 st->print("\""); 326 for (int index = 0; index < length; index++) { 327 st->print("%c", value->char_at(index + offset)); 328 } 329 st->print("\""); 330 } 331 } 332 333 334 oop java_lang_Class::create_mirror(KlassHandle k, TRAPS) { 335 assert(k->java_mirror() == NULL, "should only assign mirror once"); 336 // Use this moment of initialization to cache modifier_flags also, 337 // to support Class.getModifiers(). Instance classes recalculate 338 // the cached flags after the class file is parsed, but before the 339 // class is put into the system dictionary. 340 int computed_modifiers = k->compute_modifier_flags(CHECK_0); 341 k->set_modifier_flags(computed_modifiers); 342 if (SystemDictionary::class_klass_loaded()) { 343 // Allocate mirror (java.lang.Class instance) 344 Handle mirror = instanceKlass::cast(SystemDictionary::class_klass())->allocate_permanent_instance(CHECK_0); 345 // Setup indirections 346 mirror->obj_field_put(klass_offset, k()); 347 k->set_java_mirror(mirror()); 348 // It might also have a component mirror. This mirror must already exist. 349 if (k->oop_is_javaArray()) { 350 Handle comp_mirror; 351 if (k->oop_is_typeArray()) { 352 BasicType type = typeArrayKlass::cast(k->as_klassOop())->element_type(); 353 comp_mirror = Universe::java_mirror(type); 354 assert(comp_mirror.not_null(), "must have primitive mirror"); 355 } else if (k->oop_is_objArray()) { 356 klassOop element_klass = objArrayKlass::cast(k->as_klassOop())->element_klass(); 357 if (element_klass != NULL 358 && (Klass::cast(element_klass)->oop_is_instance() || 359 Klass::cast(element_klass)->oop_is_javaArray())) { 360 comp_mirror = Klass::cast(element_klass)->java_mirror(); 361 assert(comp_mirror.not_null(), "must have element mirror"); 362 } 363 // else some object array internal to the VM, like systemObjArrayKlassObj 364 } 365 if (comp_mirror.not_null()) { 366 // Two-way link between the array klass and its component mirror: 367 arrayKlass::cast(k->as_klassOop())->set_component_mirror(comp_mirror()); 368 set_array_klass(comp_mirror(), k->as_klassOop()); 369 } 370 } 371 return mirror(); 372 } else { 373 return NULL; 374 } 375 } 376 377 378 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) { 379 // This should be improved by adding a field at the Java level or by 380 // introducing a new VM klass (see comment in ClassFileParser) 381 oop java_class = instanceKlass::cast(SystemDictionary::class_klass())->allocate_permanent_instance(CHECK_0); 382 if (type != T_VOID) { 383 klassOop aklass = Universe::typeArrayKlassObj(type); 384 assert(aklass != NULL, "correct bootstrap"); 385 set_array_klass(java_class, aklass); 386 } 387 return java_class; 388 } 389 390 391 klassOop java_lang_Class::as_klassOop(oop java_class) { 392 //%note memory_2 393 klassOop k = klassOop(java_class->obj_field(klass_offset)); 394 assert(k == NULL || k->is_klass(), "type check"); 395 return k; 396 } 397 398 399 void java_lang_Class::print_signature(oop java_class, outputStream* st) { 400 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 401 symbolOop name = NULL; 402 bool is_instance = false; 403 if (is_primitive(java_class)) { 404 name = vmSymbols::type_signature(primitive_type(java_class)); 405 } else { 406 klassOop k = as_klassOop(java_class); 407 is_instance = Klass::cast(k)->oop_is_instance(); 408 name = Klass::cast(k)->name(); 409 } 410 if (name == NULL) { 411 st->print("<null>"); 412 return; 413 } 414 if (is_instance) st->print("L"); 415 st->write((char*) name->base(), (int) name->utf8_length()); 416 if (is_instance) st->print(";"); 417 } 418 419 symbolOop java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) { 420 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 421 symbolOop name = NULL; 422 if (is_primitive(java_class)) { 423 return vmSymbols::type_signature(primitive_type(java_class)); 424 } else { 425 klassOop k = as_klassOop(java_class); 426 if (!Klass::cast(k)->oop_is_instance()) { 427 return Klass::cast(k)->name(); 428 } else { 429 ResourceMark rm; 430 const char* sigstr = Klass::cast(k)->signature_name(); 431 int siglen = (int) strlen(sigstr); 432 if (!intern_if_not_found) 433 return SymbolTable::probe(sigstr, siglen); 434 else 435 return oopFactory::new_symbol(sigstr, siglen, THREAD); 436 } 437 } 438 } 439 440 441 klassOop java_lang_Class::array_klass(oop java_class) { 442 klassOop k = klassOop(java_class->obj_field(array_klass_offset)); 443 assert(k == NULL || k->is_klass() && Klass::cast(k)->oop_is_javaArray(), "should be array klass"); 444 return k; 445 } 446 447 448 void java_lang_Class::set_array_klass(oop java_class, klassOop klass) { 449 assert(klass->is_klass() && Klass::cast(klass)->oop_is_javaArray(), "should be array klass"); 450 java_class->obj_field_put(array_klass_offset, klass); 451 } 452 453 454 methodOop java_lang_Class::resolved_constructor(oop java_class) { 455 oop constructor = java_class->obj_field(resolved_constructor_offset); 456 assert(constructor == NULL || constructor->is_method(), "should be method"); 457 return methodOop(constructor); 458 } 459 460 461 void java_lang_Class::set_resolved_constructor(oop java_class, methodOop constructor) { 462 assert(constructor->is_method(), "should be method"); 463 java_class->obj_field_put(resolved_constructor_offset, constructor); 464 } 465 466 467 bool java_lang_Class::is_primitive(oop java_class) { 468 // should assert: 469 //assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 470 klassOop k = klassOop(java_class->obj_field(klass_offset)); 471 return k == NULL; 472 } 473 474 475 BasicType java_lang_Class::primitive_type(oop java_class) { 476 assert(java_lang_Class::is_primitive(java_class), "just checking"); 477 klassOop ak = klassOop(java_class->obj_field(array_klass_offset)); 478 BasicType type = T_VOID; 479 if (ak != NULL) { 480 // Note: create_basic_type_mirror above initializes ak to a non-null value. 481 type = arrayKlass::cast(ak)->element_type(); 482 } else { 483 assert(java_class == Universe::void_mirror(), "only valid non-array primitive"); 484 } 485 assert(Universe::java_mirror(type) == java_class, "must be consistent"); 486 return type; 487 } 488 489 BasicType java_lang_Class::as_BasicType(oop java_class, klassOop* reference_klass) { 490 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 491 if (is_primitive(java_class)) { 492 if (reference_klass != NULL) 493 (*reference_klass) = NULL; 494 return primitive_type(java_class); 495 } else { 496 if (reference_klass != NULL) 497 (*reference_klass) = as_klassOop(java_class); 498 return T_OBJECT; 499 } 500 } 501 502 503 oop java_lang_Class::primitive_mirror(BasicType t) { 504 oop mirror = Universe::java_mirror(t); 505 assert(mirror != NULL && mirror->is_a(SystemDictionary::class_klass()), "must be a Class"); 506 assert(java_lang_Class::is_primitive(mirror), "must be primitive"); 507 return mirror; 508 } 509 510 bool java_lang_Class::offsets_computed = false; 511 int java_lang_Class::classRedefinedCount_offset = -1; 512 int java_lang_Class::parallelCapable_offset = -1; 513 514 void java_lang_Class::compute_offsets() { 515 assert(!offsets_computed, "offsets should be initialized only once"); 516 offsets_computed = true; 517 518 klassOop k = SystemDictionary::class_klass(); 519 // The classRedefinedCount field is only present starting in 1.5, 520 // so don't go fatal. 521 compute_optional_offset(classRedefinedCount_offset, 522 k, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature()); 523 524 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7, 525 klassOop k1 = SystemDictionary::classloader_klass(); 526 compute_optional_offset(parallelCapable_offset, 527 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature()); 528 } 529 530 // For class loader classes, parallelCapable defined 531 // based on non-null field 532 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it 533 bool java_lang_Class::parallelCapable(oop class_loader) { 534 if (!JDK_Version::is_gte_jdk17x_version() 535 || parallelCapable_offset == -1) { 536 // Default for backward compatibility is false 537 return false; 538 } 539 return (class_loader->obj_field(parallelCapable_offset) != NULL); 540 } 541 542 int java_lang_Class::classRedefinedCount(oop the_class_mirror) { 543 if (!JDK_Version::is_gte_jdk15x_version() 544 || classRedefinedCount_offset == -1) { 545 // The classRedefinedCount field is only present starting in 1.5. 546 // If we don't have an offset for it then just return -1 as a marker. 547 return -1; 548 } 549 550 return the_class_mirror->int_field(classRedefinedCount_offset); 551 } 552 553 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) { 554 if (!JDK_Version::is_gte_jdk15x_version() 555 || classRedefinedCount_offset == -1) { 556 // The classRedefinedCount field is only present starting in 1.5. 557 // If we don't have an offset for it then nothing to set. 558 return; 559 } 560 561 the_class_mirror->int_field_put(classRedefinedCount_offset, value); 562 } 563 564 565 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the 566 // platform thread structure, and a eetop offset which was used for thread 567 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures 568 // merged, so in the HotSpot VM we just use the eetop field for the thread 569 // instead of the privateInfo_offset. 570 // 571 // Note: The stackSize field is only present starting in 1.4. 572 573 int java_lang_Thread::_name_offset = 0; 574 int java_lang_Thread::_group_offset = 0; 575 int java_lang_Thread::_contextClassLoader_offset = 0; 576 int java_lang_Thread::_inheritedAccessControlContext_offset = 0; 577 int java_lang_Thread::_priority_offset = 0; 578 int java_lang_Thread::_eetop_offset = 0; 579 int java_lang_Thread::_daemon_offset = 0; 580 int java_lang_Thread::_stillborn_offset = 0; 581 int java_lang_Thread::_stackSize_offset = 0; 582 int java_lang_Thread::_tid_offset = 0; 583 int java_lang_Thread::_thread_status_offset = 0; 584 int java_lang_Thread::_park_blocker_offset = 0; 585 int java_lang_Thread::_park_event_offset = 0 ; 586 587 588 void java_lang_Thread::compute_offsets() { 589 assert(_group_offset == 0, "offsets should be initialized only once"); 590 591 klassOop k = SystemDictionary::thread_klass(); 592 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::char_array_signature()); 593 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature()); 594 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature()); 595 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature()); 596 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature()); 597 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature()); 598 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature()); 599 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature()); 600 // The stackSize field is only present starting in 1.4, so don't go fatal. 601 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature()); 602 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal. 603 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature()); 604 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature()); 605 // The parkBlocker field is only present starting in 1.6, so don't go fatal. 606 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature()); 607 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(), 608 vmSymbols::long_signature()); 609 } 610 611 612 JavaThread* java_lang_Thread::thread(oop java_thread) { 613 return (JavaThread*)java_thread->address_field(_eetop_offset); 614 } 615 616 617 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) { 618 java_thread->address_field_put(_eetop_offset, (address)thread); 619 } 620 621 622 typeArrayOop java_lang_Thread::name(oop java_thread) { 623 oop name = java_thread->obj_field(_name_offset); 624 assert(name == NULL || (name->is_typeArray() && typeArrayKlass::cast(name->klass())->element_type() == T_CHAR), "just checking"); 625 return typeArrayOop(name); 626 } 627 628 629 void java_lang_Thread::set_name(oop java_thread, typeArrayOop name) { 630 assert(java_thread->obj_field(_name_offset) == NULL, "name should be NULL"); 631 java_thread->obj_field_put(_name_offset, name); 632 } 633 634 635 ThreadPriority java_lang_Thread::priority(oop java_thread) { 636 return (ThreadPriority)java_thread->int_field(_priority_offset); 637 } 638 639 640 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) { 641 java_thread->int_field_put(_priority_offset, priority); 642 } 643 644 645 oop java_lang_Thread::threadGroup(oop java_thread) { 646 return java_thread->obj_field(_group_offset); 647 } 648 649 650 bool java_lang_Thread::is_stillborn(oop java_thread) { 651 return java_thread->bool_field(_stillborn_offset) != 0; 652 } 653 654 655 // We never have reason to turn the stillborn bit off 656 void java_lang_Thread::set_stillborn(oop java_thread) { 657 java_thread->bool_field_put(_stillborn_offset, true); 658 } 659 660 661 bool java_lang_Thread::is_alive(oop java_thread) { 662 JavaThread* thr = java_lang_Thread::thread(java_thread); 663 return (thr != NULL); 664 } 665 666 667 bool java_lang_Thread::is_daemon(oop java_thread) { 668 return java_thread->bool_field(_daemon_offset) != 0; 669 } 670 671 672 void java_lang_Thread::set_daemon(oop java_thread) { 673 java_thread->bool_field_put(_daemon_offset, true); 674 } 675 676 oop java_lang_Thread::context_class_loader(oop java_thread) { 677 return java_thread->obj_field(_contextClassLoader_offset); 678 } 679 680 oop java_lang_Thread::inherited_access_control_context(oop java_thread) { 681 return java_thread->obj_field(_inheritedAccessControlContext_offset); 682 } 683 684 685 jlong java_lang_Thread::stackSize(oop java_thread) { 686 // The stackSize field is only present starting in 1.4 687 if (_stackSize_offset > 0) { 688 assert(JDK_Version::is_gte_jdk14x_version(), "sanity check"); 689 return java_thread->long_field(_stackSize_offset); 690 } else { 691 return 0; 692 } 693 } 694 695 // Write the thread status value to threadStatus field in java.lang.Thread java class. 696 void java_lang_Thread::set_thread_status(oop java_thread, 697 java_lang_Thread::ThreadStatus status) { 698 assert(JavaThread::current()->thread_state() == _thread_in_vm, "Java Thread is not running in vm"); 699 // The threadStatus is only present starting in 1.5 700 if (_thread_status_offset > 0) { 701 java_thread->int_field_put(_thread_status_offset, status); 702 } 703 } 704 705 // Read thread status value from threadStatus field in java.lang.Thread java class. 706 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) { 707 assert(Thread::current()->is_VM_thread() || 708 JavaThread::current()->thread_state() == _thread_in_vm, 709 "Java Thread is not running in vm"); 710 // The threadStatus is only present starting in 1.5 711 if (_thread_status_offset > 0) { 712 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 713 } else { 714 // All we can easily figure out is if it is alive, but that is 715 // enough info for a valid unknown status. 716 // These aren't restricted to valid set ThreadStatus values, so 717 // use JVMTI values and cast. 718 JavaThread* thr = java_lang_Thread::thread(java_thread); 719 if (thr == NULL) { 720 // the thread hasn't run yet or is in the process of exiting 721 return NEW; 722 } 723 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE; 724 } 725 } 726 727 728 jlong java_lang_Thread::thread_id(oop java_thread) { 729 // The thread ID field is only present starting in 1.5 730 if (_tid_offset > 0) { 731 return java_thread->long_field(_tid_offset); 732 } else { 733 return 0; 734 } 735 } 736 737 oop java_lang_Thread::park_blocker(oop java_thread) { 738 assert(JDK_Version::current().supports_thread_park_blocker() && 739 _park_blocker_offset != 0, "Must support parkBlocker field"); 740 741 if (_park_blocker_offset > 0) { 742 return java_thread->obj_field(_park_blocker_offset); 743 } 744 745 return NULL; 746 } 747 748 jlong java_lang_Thread::park_event(oop java_thread) { 749 if (_park_event_offset > 0) { 750 return java_thread->long_field(_park_event_offset); 751 } 752 return 0; 753 } 754 755 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) { 756 if (_park_event_offset > 0) { 757 java_thread->long_field_put(_park_event_offset, ptr); 758 return true; 759 } 760 return false; 761 } 762 763 764 const char* java_lang_Thread::thread_status_name(oop java_thread) { 765 assert(JDK_Version::is_gte_jdk15x_version() && _thread_status_offset != 0, "Must have thread status"); 766 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 767 switch (status) { 768 case NEW : return "NEW"; 769 case RUNNABLE : return "RUNNABLE"; 770 case SLEEPING : return "TIMED_WAITING (sleeping)"; 771 case IN_OBJECT_WAIT : return "WAITING (on object monitor)"; 772 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)"; 773 case PARKED : return "WAITING (parking)"; 774 case PARKED_TIMED : return "TIMED_WAITING (parking)"; 775 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)"; 776 case TERMINATED : return "TERMINATED"; 777 default : return "UNKNOWN"; 778 }; 779 } 780 int java_lang_ThreadGroup::_parent_offset = 0; 781 int java_lang_ThreadGroup::_name_offset = 0; 782 int java_lang_ThreadGroup::_threads_offset = 0; 783 int java_lang_ThreadGroup::_groups_offset = 0; 784 int java_lang_ThreadGroup::_maxPriority_offset = 0; 785 int java_lang_ThreadGroup::_destroyed_offset = 0; 786 int java_lang_ThreadGroup::_daemon_offset = 0; 787 int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0; 788 int java_lang_ThreadGroup::_nthreads_offset = 0; 789 int java_lang_ThreadGroup::_ngroups_offset = 0; 790 791 oop java_lang_ThreadGroup::parent(oop java_thread_group) { 792 assert(java_thread_group->is_oop(), "thread group must be oop"); 793 return java_thread_group->obj_field(_parent_offset); 794 } 795 796 // ("name as oop" accessor is not necessary) 797 798 typeArrayOop java_lang_ThreadGroup::name(oop java_thread_group) { 799 oop name = java_thread_group->obj_field(_name_offset); 800 // ThreadGroup.name can be null 801 return name == NULL ? (typeArrayOop)NULL : java_lang_String::value(name); 802 } 803 804 int java_lang_ThreadGroup::nthreads(oop java_thread_group) { 805 assert(java_thread_group->is_oop(), "thread group must be oop"); 806 return java_thread_group->int_field(_nthreads_offset); 807 } 808 809 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) { 810 oop threads = java_thread_group->obj_field(_threads_offset); 811 assert(threads != NULL, "threadgroups should have threads"); 812 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code 813 return objArrayOop(threads); 814 } 815 816 int java_lang_ThreadGroup::ngroups(oop java_thread_group) { 817 assert(java_thread_group->is_oop(), "thread group must be oop"); 818 return java_thread_group->int_field(_ngroups_offset); 819 } 820 821 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) { 822 oop groups = java_thread_group->obj_field(_groups_offset); 823 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code 824 return objArrayOop(groups); 825 } 826 827 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) { 828 assert(java_thread_group->is_oop(), "thread group must be oop"); 829 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset); 830 } 831 832 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) { 833 assert(java_thread_group->is_oop(), "thread group must be oop"); 834 return java_thread_group->bool_field(_destroyed_offset) != 0; 835 } 836 837 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) { 838 assert(java_thread_group->is_oop(), "thread group must be oop"); 839 return java_thread_group->bool_field(_daemon_offset) != 0; 840 } 841 842 bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) { 843 assert(java_thread_group->is_oop(), "thread group must be oop"); 844 return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0; 845 } 846 847 void java_lang_ThreadGroup::compute_offsets() { 848 assert(_parent_offset == 0, "offsets should be initialized only once"); 849 850 klassOop k = SystemDictionary::threadGroup_klass(); 851 852 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature()); 853 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 854 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature()); 855 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature()); 856 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature()); 857 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature()); 858 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature()); 859 compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature()); 860 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature()); 861 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature()); 862 } 863 864 oop java_lang_Throwable::backtrace(oop throwable) { 865 return throwable->obj_field_acquire(backtrace_offset); 866 } 867 868 869 void java_lang_Throwable::set_backtrace(oop throwable, oop value) { 870 throwable->release_obj_field_put(backtrace_offset, value); 871 } 872 873 874 oop java_lang_Throwable::message(oop throwable) { 875 return throwable->obj_field(detailMessage_offset); 876 } 877 878 879 oop java_lang_Throwable::message(Handle throwable) { 880 return throwable->obj_field(detailMessage_offset); 881 } 882 883 884 void java_lang_Throwable::set_message(oop throwable, oop value) { 885 throwable->obj_field_put(detailMessage_offset, value); 886 } 887 888 889 void java_lang_Throwable::clear_stacktrace(oop throwable) { 890 assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4"); 891 throwable->obj_field_put(stackTrace_offset, NULL); 892 } 893 894 895 void java_lang_Throwable::print(oop throwable, outputStream* st) { 896 ResourceMark rm; 897 klassOop k = throwable->klass(); 898 assert(k != NULL, "just checking"); 899 st->print("%s", instanceKlass::cast(k)->external_name()); 900 oop msg = message(throwable); 901 if (msg != NULL) { 902 st->print(": %s", java_lang_String::as_utf8_string(msg)); 903 } 904 } 905 906 907 void java_lang_Throwable::print(Handle throwable, outputStream* st) { 908 ResourceMark rm; 909 klassOop k = throwable->klass(); 910 assert(k != NULL, "just checking"); 911 st->print("%s", instanceKlass::cast(k)->external_name()); 912 oop msg = message(throwable); 913 if (msg != NULL) { 914 st->print(": %s", java_lang_String::as_utf8_string(msg)); 915 } 916 } 917 918 // Print stack trace element to resource allocated buffer 919 char* java_lang_Throwable::print_stack_element_to_buffer(methodOop method, int bci) { 920 // Get strings and string lengths 921 instanceKlass* klass = instanceKlass::cast(method->method_holder()); 922 const char* klass_name = klass->external_name(); 923 int buf_len = (int)strlen(klass_name); 924 char* source_file_name; 925 if (klass->source_file_name() == NULL) { 926 source_file_name = NULL; 927 } else { 928 source_file_name = klass->source_file_name()->as_C_string(); 929 buf_len += (int)strlen(source_file_name); 930 } 931 char* method_name = method->name()->as_C_string(); 932 buf_len += (int)strlen(method_name); 933 934 // Allocate temporary buffer with extra space for formatting and line number 935 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64); 936 937 // Print stack trace line in buffer 938 sprintf(buf, "\tat %s.%s", klass_name, method_name); 939 if (method->is_native()) { 940 strcat(buf, "(Native Method)"); 941 } else { 942 int line_number = method->line_number_from_bci(bci); 943 if (source_file_name != NULL && (line_number != -1)) { 944 // Sourcename and linenumber 945 sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number); 946 } else if (source_file_name != NULL) { 947 // Just sourcename 948 sprintf(buf + (int)strlen(buf), "(%s)", source_file_name); 949 } else { 950 // Neither soucename and linenumber 951 sprintf(buf + (int)strlen(buf), "(Unknown Source)"); 952 } 953 nmethod* nm = method->code(); 954 if (WizardMode && nm != NULL) { 955 sprintf(buf + (int)strlen(buf), "(nmethod " PTR_FORMAT ")", (intptr_t)nm); 956 } 957 } 958 959 return buf; 960 } 961 962 963 void java_lang_Throwable::print_stack_element(Handle stream, methodOop method, int bci) { 964 ResourceMark rm; 965 char* buf = print_stack_element_to_buffer(method, bci); 966 print_to_stream(stream, buf); 967 } 968 969 void java_lang_Throwable::print_stack_element(outputStream *st, methodOop method, int bci) { 970 ResourceMark rm; 971 char* buf = print_stack_element_to_buffer(method, bci); 972 st->print_cr("%s", buf); 973 } 974 975 void java_lang_Throwable::print_to_stream(Handle stream, const char* str) { 976 if (stream.is_null()) { 977 tty->print_cr("%s", str); 978 } else { 979 EXCEPTION_MARK; 980 JavaValue result(T_VOID); 981 Handle arg (THREAD, oopFactory::new_charArray(str, THREAD)); 982 if (!HAS_PENDING_EXCEPTION) { 983 JavaCalls::call_virtual(&result, 984 stream, 985 KlassHandle(THREAD, stream->klass()), 986 vmSymbolHandles::println_name(), 987 vmSymbolHandles::char_array_void_signature(), 988 arg, 989 THREAD); 990 } 991 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 992 if (HAS_PENDING_EXCEPTION) CLEAR_PENDING_EXCEPTION; 993 } 994 995 } 996 997 998 const char* java_lang_Throwable::no_stack_trace_message() { 999 return "\t<<no stack trace available>>"; 1000 } 1001 1002 1003 // Currently used only for exceptions occurring during startup 1004 void java_lang_Throwable::print_stack_trace(oop throwable, outputStream* st) { 1005 Thread *THREAD = Thread::current(); 1006 Handle h_throwable(THREAD, throwable); 1007 while (h_throwable.not_null()) { 1008 objArrayHandle result (THREAD, objArrayOop(backtrace(h_throwable()))); 1009 if (result.is_null()) { 1010 st->print_cr(no_stack_trace_message()); 1011 return; 1012 } 1013 1014 while (result.not_null()) { 1015 objArrayHandle methods (THREAD, 1016 objArrayOop(result->obj_at(trace_methods_offset))); 1017 typeArrayHandle bcis (THREAD, 1018 typeArrayOop(result->obj_at(trace_bcis_offset))); 1019 1020 if (methods.is_null() || bcis.is_null()) { 1021 st->print_cr(no_stack_trace_message()); 1022 return; 1023 } 1024 1025 int length = methods()->length(); 1026 for (int index = 0; index < length; index++) { 1027 methodOop method = methodOop(methods()->obj_at(index)); 1028 if (method == NULL) goto handle_cause; 1029 int bci = bcis->ushort_at(index); 1030 print_stack_element(st, method, bci); 1031 } 1032 result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset))); 1033 } 1034 handle_cause: 1035 { 1036 EXCEPTION_MARK; 1037 JavaValue result(T_OBJECT); 1038 JavaCalls::call_virtual(&result, 1039 h_throwable, 1040 KlassHandle(THREAD, h_throwable->klass()), 1041 vmSymbolHandles::getCause_name(), 1042 vmSymbolHandles::void_throwable_signature(), 1043 THREAD); 1044 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 1045 if (HAS_PENDING_EXCEPTION) { 1046 CLEAR_PENDING_EXCEPTION; 1047 h_throwable = Handle(); 1048 } else { 1049 h_throwable = Handle(THREAD, (oop) result.get_jobject()); 1050 if (h_throwable.not_null()) { 1051 st->print("Caused by: "); 1052 print(h_throwable, st); 1053 st->cr(); 1054 } 1055 } 1056 } 1057 } 1058 } 1059 1060 1061 void java_lang_Throwable::print_stack_trace(oop throwable, oop print_stream) { 1062 // Note: this is no longer used in Merlin, but we support it for compatibility. 1063 Thread *thread = Thread::current(); 1064 Handle stream(thread, print_stream); 1065 objArrayHandle result (thread, objArrayOop(backtrace(throwable))); 1066 if (result.is_null()) { 1067 print_to_stream(stream, no_stack_trace_message()); 1068 return; 1069 } 1070 1071 while (result.not_null()) { 1072 objArrayHandle methods (thread, 1073 objArrayOop(result->obj_at(trace_methods_offset))); 1074 typeArrayHandle bcis (thread, 1075 typeArrayOop(result->obj_at(trace_bcis_offset))); 1076 1077 if (methods.is_null() || bcis.is_null()) { 1078 print_to_stream(stream, no_stack_trace_message()); 1079 return; 1080 } 1081 1082 int length = methods()->length(); 1083 for (int index = 0; index < length; index++) { 1084 methodOop method = methodOop(methods()->obj_at(index)); 1085 if (method == NULL) return; 1086 int bci = bcis->ushort_at(index); 1087 print_stack_element(stream, method, bci); 1088 } 1089 result = objArrayHandle(thread, objArrayOop(result->obj_at(trace_next_offset))); 1090 } 1091 } 1092 1093 // This class provides a simple wrapper over the internal structure of 1094 // exception backtrace to insulate users of the backtrace from needing 1095 // to know what it looks like. 1096 class BacktraceBuilder: public StackObj { 1097 private: 1098 Handle _backtrace; 1099 objArrayOop _head; 1100 objArrayOop _methods; 1101 typeArrayOop _bcis; 1102 int _index; 1103 bool _dirty; 1104 No_Safepoint_Verifier _nsv; 1105 1106 public: 1107 1108 enum { 1109 trace_methods_offset = java_lang_Throwable::trace_methods_offset, 1110 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset, 1111 trace_next_offset = java_lang_Throwable::trace_next_offset, 1112 trace_size = java_lang_Throwable::trace_size, 1113 trace_chunk_size = java_lang_Throwable::trace_chunk_size 1114 }; 1115 1116 // constructor for new backtrace 1117 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _dirty(false) { 1118 expand(CHECK); 1119 _backtrace = _head; 1120 _index = 0; 1121 } 1122 1123 void flush() { 1124 if (_dirty && _methods != NULL) { 1125 BarrierSet* bs = Universe::heap()->barrier_set(); 1126 assert(bs->has_write_ref_array_opt(), "Barrier set must have ref array opt"); 1127 bs->write_ref_array(MemRegion((HeapWord*)_methods->base(), 1128 _methods->array_size())); 1129 _dirty = false; 1130 } 1131 } 1132 1133 void expand(TRAPS) { 1134 flush(); 1135 1136 objArrayHandle old_head(THREAD, _head); 1137 Pause_No_Safepoint_Verifier pnsv(&_nsv); 1138 1139 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK); 1140 objArrayHandle new_head(THREAD, head); 1141 1142 objArrayOop methods = oopFactory::new_objectArray(trace_chunk_size, CHECK); 1143 objArrayHandle new_methods(THREAD, methods); 1144 1145 typeArrayOop bcis = oopFactory::new_shortArray(trace_chunk_size, CHECK); 1146 typeArrayHandle new_bcis(THREAD, bcis); 1147 1148 if (!old_head.is_null()) { 1149 old_head->obj_at_put(trace_next_offset, new_head()); 1150 } 1151 new_head->obj_at_put(trace_methods_offset, new_methods()); 1152 new_head->obj_at_put(trace_bcis_offset, new_bcis()); 1153 1154 _head = new_head(); 1155 _methods = new_methods(); 1156 _bcis = new_bcis(); 1157 _index = 0; 1158 } 1159 1160 oop backtrace() { 1161 flush(); 1162 return _backtrace(); 1163 } 1164 1165 inline void push(methodOop method, short bci, TRAPS) { 1166 if (_index >= trace_chunk_size) { 1167 methodHandle mhandle(THREAD, method); 1168 expand(CHECK); 1169 method = mhandle(); 1170 } 1171 1172 _methods->obj_at_put(_index, method); 1173 // bad for UseCompressedOops 1174 // *_methods->obj_at_addr(_index) = method; 1175 _bcis->ushort_at_put(_index, bci); 1176 _index++; 1177 _dirty = true; 1178 } 1179 1180 methodOop current_method() { 1181 assert(_index >= 0 && _index < trace_chunk_size, "out of range"); 1182 return methodOop(_methods->obj_at(_index)); 1183 } 1184 1185 jushort current_bci() { 1186 assert(_index >= 0 && _index < trace_chunk_size, "out of range"); 1187 return _bcis->ushort_at(_index); 1188 } 1189 }; 1190 1191 1192 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, TRAPS) { 1193 if (!StackTraceInThrowable) return; 1194 ResourceMark rm(THREAD); 1195 1196 // Start out by clearing the backtrace for this object, in case the VM 1197 // runs out of memory while allocating the stack trace 1198 set_backtrace(throwable(), NULL); 1199 if (JDK_Version::is_gte_jdk14x_version()) { 1200 // New since 1.4, clear lazily constructed Java level stacktrace if 1201 // refilling occurs 1202 clear_stacktrace(throwable()); 1203 } 1204 1205 int max_depth = MaxJavaStackTraceDepth; 1206 JavaThread* thread = (JavaThread*)THREAD; 1207 BacktraceBuilder bt(CHECK); 1208 1209 // Instead of using vframe directly, this version of fill_in_stack_trace 1210 // basically handles everything by hand. This significantly improved the 1211 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows. 1212 // See bug 6333838 for more details. 1213 // The "ASSERT" here is to verify this method generates the exactly same stack 1214 // trace as utilizing vframe. 1215 #ifdef ASSERT 1216 vframeStream st(thread); 1217 methodHandle st_method(THREAD, st.method()); 1218 #endif 1219 int total_count = 0; 1220 RegisterMap map(thread, false); 1221 int decode_offset = 0; 1222 nmethod* nm = NULL; 1223 bool skip_fillInStackTrace_check = false; 1224 bool skip_throwableInit_check = false; 1225 1226 for (frame fr = thread->last_frame(); max_depth != total_count;) { 1227 methodOop method = NULL; 1228 int bci = 0; 1229 1230 // Compiled java method case. 1231 if (decode_offset != 0) { 1232 bool dummy_reexecute = false; 1233 DebugInfoReadStream stream(nm, decode_offset); 1234 decode_offset = stream.read_int(); 1235 method = (methodOop)nm->oop_at(stream.read_int()); 1236 //fill_in_stack_trace does not need the reexecute information which is designed 1237 //for the deopt to reexecute 1238 bci = stream.read_bci_and_reexecute(dummy_reexecute); 1239 } else { 1240 if (fr.is_first_frame()) break; 1241 address pc = fr.pc(); 1242 if (fr.is_interpreted_frame()) { 1243 intptr_t bcx = fr.interpreter_frame_bcx(); 1244 method = fr.interpreter_frame_method(); 1245 bci = fr.is_bci(bcx) ? bcx : method->bci_from((address)bcx); 1246 fr = fr.sender(&map); 1247 } else { 1248 CodeBlob* cb = fr.cb(); 1249 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL 1250 // but non nmethod 1251 fr = fr.sender(&map); 1252 if (cb == NULL || !cb->is_nmethod()) { 1253 continue; 1254 } 1255 nm = (nmethod*)cb; 1256 if (nm->method()->is_native()) { 1257 method = nm->method(); 1258 bci = 0; 1259 } else { 1260 PcDesc* pd = nm->pc_desc_at(pc); 1261 decode_offset = pd->scope_decode_offset(); 1262 // if decode_offset is not equal to 0, it will execute the 1263 // "compiled java method case" at the beginning of the loop. 1264 continue; 1265 } 1266 } 1267 } 1268 #ifdef ASSERT 1269 assert(st_method() == method && st.bci() == bci, 1270 "Wrong stack trace"); 1271 st.next(); 1272 // vframeStream::method isn't GC-safe so store off a copy 1273 // of the methodOop in case we GC. 1274 if (!st.at_end()) { 1275 st_method = st.method(); 1276 } 1277 #endif 1278 if (!skip_fillInStackTrace_check) { 1279 // check "fillInStackTrace" only once, so we negate the flag 1280 // after the first time check. 1281 skip_fillInStackTrace_check = true; 1282 if (method->name() == vmSymbols::fillInStackTrace_name()) { 1283 continue; 1284 } 1285 } 1286 // skip <init> methods of the exceptions klass. If there is <init> methods 1287 // that belongs to a superclass of the exception we are going to skipping 1288 // them in stack trace. This is simlar to classic VM. 1289 if (!skip_throwableInit_check) { 1290 if (method->name() == vmSymbols::object_initializer_name() && 1291 throwable->is_a(method->method_holder())) { 1292 continue; 1293 } else { 1294 // if no "Throwable.init()" method found, we stop checking it next time. 1295 skip_throwableInit_check = true; 1296 } 1297 } 1298 bt.push(method, bci, CHECK); 1299 total_count++; 1300 } 1301 1302 // Put completed stack trace into throwable object 1303 set_backtrace(throwable(), bt.backtrace()); 1304 } 1305 1306 void java_lang_Throwable::fill_in_stack_trace(Handle throwable) { 1307 // No-op if stack trace is disabled 1308 if (!StackTraceInThrowable) { 1309 return; 1310 } 1311 1312 // Disable stack traces for some preallocated out of memory errors 1313 if (!Universe::should_fill_in_stack_trace(throwable)) { 1314 return; 1315 } 1316 1317 PRESERVE_EXCEPTION_MARK; 1318 1319 JavaThread* thread = JavaThread::active(); 1320 fill_in_stack_trace(throwable, thread); 1321 // ignore exceptions thrown during stack trace filling 1322 CLEAR_PENDING_EXCEPTION; 1323 } 1324 1325 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 1326 // Allocate stack trace - backtrace is created but not filled in 1327 1328 // No-op if stack trace is disabled 1329 if (!StackTraceInThrowable) return; 1330 1331 objArrayOop h_oop = oopFactory::new_objectArray(trace_size, CHECK); 1332 objArrayHandle backtrace (THREAD, h_oop); 1333 objArrayOop m_oop = oopFactory::new_objectArray(trace_chunk_size, CHECK); 1334 objArrayHandle methods (THREAD, m_oop); 1335 typeArrayOop b = oopFactory::new_shortArray(trace_chunk_size, CHECK); 1336 typeArrayHandle bcis(THREAD, b); 1337 1338 // backtrace has space for one chunk (next is NULL) 1339 backtrace->obj_at_put(trace_methods_offset, methods()); 1340 backtrace->obj_at_put(trace_bcis_offset, bcis()); 1341 set_backtrace(throwable(), backtrace()); 1342 } 1343 1344 1345 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 1346 // Fill in stack trace into preallocated backtrace (no GC) 1347 1348 // No-op if stack trace is disabled 1349 if (!StackTraceInThrowable) return; 1350 1351 assert(throwable->is_a(SystemDictionary::throwable_klass()), "sanity check"); 1352 1353 oop backtrace = java_lang_Throwable::backtrace(throwable()); 1354 assert(backtrace != NULL, "backtrace not preallocated"); 1355 1356 oop m = objArrayOop(backtrace)->obj_at(trace_methods_offset); 1357 objArrayOop methods = objArrayOop(m); 1358 assert(methods != NULL && methods->length() > 0, "method array not preallocated"); 1359 1360 oop b = objArrayOop(backtrace)->obj_at(trace_bcis_offset); 1361 typeArrayOop bcis = typeArrayOop(b); 1362 assert(bcis != NULL, "bci array not preallocated"); 1363 1364 assert(methods->length() == bcis->length(), "method and bci arrays should match"); 1365 1366 JavaThread* thread = JavaThread::current(); 1367 ResourceMark rm(thread); 1368 vframeStream st(thread); 1369 1370 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 1371 // methods as preallocated errors aren't created by "java" code. 1372 1373 // fill in as much stack trace as possible 1374 int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth); 1375 int chunk_count = 0; 1376 1377 for (;!st.at_end(); st.next()) { 1378 // add element 1379 bcis->ushort_at_put(chunk_count, st.bci()); 1380 methods->obj_at_put(chunk_count, st.method()); 1381 1382 chunk_count++; 1383 1384 // Bail-out for deep stacks 1385 if (chunk_count >= max_chunks) break; 1386 } 1387 } 1388 1389 1390 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) { 1391 if (throwable == NULL) { 1392 THROW_0(vmSymbols::java_lang_NullPointerException()); 1393 } 1394 objArrayOop chunk = objArrayOop(backtrace(throwable)); 1395 int depth = 0; 1396 if (chunk != NULL) { 1397 // Iterate over chunks and count full ones 1398 while (true) { 1399 objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset)); 1400 if (next == NULL) break; 1401 depth += trace_chunk_size; 1402 chunk = next; 1403 } 1404 assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check"); 1405 // Count element in remaining partial chunk 1406 objArrayOop methods = objArrayOop(chunk->obj_at(trace_methods_offset)); 1407 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 1408 assert(methods != NULL && bcis != NULL, "sanity check"); 1409 for (int i = 0; i < methods->length(); i++) { 1410 if (methods->obj_at(i) == NULL) break; 1411 depth++; 1412 } 1413 } 1414 return depth; 1415 } 1416 1417 1418 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) { 1419 if (throwable == NULL) { 1420 THROW_0(vmSymbols::java_lang_NullPointerException()); 1421 } 1422 if (index < 0) { 1423 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 1424 } 1425 // Compute how many chunks to skip and index into actual chunk 1426 objArrayOop chunk = objArrayOop(backtrace(throwable)); 1427 int skip_chunks = index / trace_chunk_size; 1428 int chunk_index = index % trace_chunk_size; 1429 while (chunk != NULL && skip_chunks > 0) { 1430 chunk = objArrayOop(chunk->obj_at(trace_next_offset)); 1431 skip_chunks--; 1432 } 1433 if (chunk == NULL) { 1434 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 1435 } 1436 // Get method,bci from chunk 1437 objArrayOop methods = objArrayOop(chunk->obj_at(trace_methods_offset)); 1438 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 1439 assert(methods != NULL && bcis != NULL, "sanity check"); 1440 methodHandle method(THREAD, methodOop(methods->obj_at(chunk_index))); 1441 int bci = bcis->ushort_at(chunk_index); 1442 // Chunk can be partial full 1443 if (method.is_null()) { 1444 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 1445 } 1446 1447 oop element = java_lang_StackTraceElement::create(method, bci, CHECK_0); 1448 return element; 1449 } 1450 1451 oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) { 1452 // SystemDictionary::stackTraceElement_klass() will be null for pre-1.4 JDKs 1453 assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4"); 1454 1455 // Allocate java.lang.StackTraceElement instance 1456 klassOop k = SystemDictionary::stackTraceElement_klass(); 1457 assert(k != NULL, "must be loaded in 1.4+"); 1458 instanceKlassHandle ik (THREAD, k); 1459 if (ik->should_be_initialized()) { 1460 ik->initialize(CHECK_0); 1461 } 1462 1463 Handle element = ik->allocate_instance_handle(CHECK_0); 1464 // Fill in class name 1465 ResourceMark rm(THREAD); 1466 const char* str = instanceKlass::cast(method->method_holder())->external_name(); 1467 oop classname = StringTable::intern((char*) str, CHECK_0); 1468 java_lang_StackTraceElement::set_declaringClass(element(), classname); 1469 // Fill in method name 1470 oop methodname = StringTable::intern(method->name(), CHECK_0); 1471 java_lang_StackTraceElement::set_methodName(element(), methodname); 1472 // Fill in source file name 1473 symbolOop source = instanceKlass::cast(method->method_holder())->source_file_name(); 1474 oop filename = StringTable::intern(source, CHECK_0); 1475 java_lang_StackTraceElement::set_fileName(element(), filename); 1476 // File in source line number 1477 int line_number; 1478 if (method->is_native()) { 1479 // Negative value different from -1 below, enabling Java code in 1480 // class java.lang.StackTraceElement to distinguish "native" from 1481 // "no LineNumberTable". 1482 line_number = -2; 1483 } else { 1484 // Returns -1 if no LineNumberTable, and otherwise actual line number 1485 line_number = method->line_number_from_bci(bci); 1486 } 1487 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 1488 1489 return element(); 1490 } 1491 1492 1493 void java_lang_reflect_AccessibleObject::compute_offsets() { 1494 klassOop k = SystemDictionary::reflect_accessible_object_klass(); 1495 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature()); 1496 } 1497 1498 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 1499 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1500 return (jboolean) reflect->bool_field(override_offset); 1501 } 1502 1503 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 1504 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1505 reflect->bool_field_put(override_offset, (int) value); 1506 } 1507 1508 void java_lang_reflect_Method::compute_offsets() { 1509 klassOop k = SystemDictionary::reflect_method_klass(); 1510 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 1511 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1512 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature()); 1513 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 1514 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 1515 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 1516 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 1517 // The generic signature and annotations fields are only present in 1.5 1518 signature_offset = -1; 1519 annotations_offset = -1; 1520 parameter_annotations_offset = -1; 1521 annotation_default_offset = -1; 1522 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 1523 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 1524 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 1525 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature()); 1526 } 1527 1528 Handle java_lang_reflect_Method::create(TRAPS) { 1529 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1530 klassOop klass = SystemDictionary::reflect_method_klass(); 1531 // This class is eagerly initialized during VM initialization, since we keep a refence 1532 // to one of the methods 1533 assert(instanceKlass::cast(klass)->is_initialized(), "must be initialized"); 1534 return instanceKlass::cast(klass)->allocate_instance_handle(CHECK_NH); 1535 } 1536 1537 oop java_lang_reflect_Method::clazz(oop reflect) { 1538 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1539 return reflect->obj_field(clazz_offset); 1540 } 1541 1542 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 1543 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1544 reflect->obj_field_put(clazz_offset, value); 1545 } 1546 1547 int java_lang_reflect_Method::slot(oop reflect) { 1548 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1549 return reflect->int_field(slot_offset); 1550 } 1551 1552 void java_lang_reflect_Method::set_slot(oop reflect, int value) { 1553 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1554 reflect->int_field_put(slot_offset, value); 1555 } 1556 1557 oop java_lang_reflect_Method::name(oop method) { 1558 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1559 return method->obj_field(name_offset); 1560 } 1561 1562 void java_lang_reflect_Method::set_name(oop method, oop value) { 1563 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1564 method->obj_field_put(name_offset, value); 1565 } 1566 1567 oop java_lang_reflect_Method::return_type(oop method) { 1568 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1569 return method->obj_field(returnType_offset); 1570 } 1571 1572 void java_lang_reflect_Method::set_return_type(oop method, oop value) { 1573 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1574 method->obj_field_put(returnType_offset, value); 1575 } 1576 1577 oop java_lang_reflect_Method::parameter_types(oop method) { 1578 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1579 return method->obj_field(parameterTypes_offset); 1580 } 1581 1582 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 1583 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1584 method->obj_field_put(parameterTypes_offset, value); 1585 } 1586 1587 oop java_lang_reflect_Method::exception_types(oop method) { 1588 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1589 return method->obj_field(exceptionTypes_offset); 1590 } 1591 1592 void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 1593 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1594 method->obj_field_put(exceptionTypes_offset, value); 1595 } 1596 1597 int java_lang_reflect_Method::modifiers(oop method) { 1598 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1599 return method->int_field(modifiers_offset); 1600 } 1601 1602 void java_lang_reflect_Method::set_modifiers(oop method, int value) { 1603 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1604 method->int_field_put(modifiers_offset, value); 1605 } 1606 1607 bool java_lang_reflect_Method::has_signature_field() { 1608 return (signature_offset >= 0); 1609 } 1610 1611 oop java_lang_reflect_Method::signature(oop method) { 1612 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1613 assert(has_signature_field(), "signature field must be present"); 1614 return method->obj_field(signature_offset); 1615 } 1616 1617 void java_lang_reflect_Method::set_signature(oop method, oop value) { 1618 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1619 assert(has_signature_field(), "signature field must be present"); 1620 method->obj_field_put(signature_offset, value); 1621 } 1622 1623 bool java_lang_reflect_Method::has_annotations_field() { 1624 return (annotations_offset >= 0); 1625 } 1626 1627 oop java_lang_reflect_Method::annotations(oop method) { 1628 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1629 assert(has_annotations_field(), "annotations field must be present"); 1630 return method->obj_field(annotations_offset); 1631 } 1632 1633 void java_lang_reflect_Method::set_annotations(oop method, oop value) { 1634 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1635 assert(has_annotations_field(), "annotations field must be present"); 1636 method->obj_field_put(annotations_offset, value); 1637 } 1638 1639 bool java_lang_reflect_Method::has_parameter_annotations_field() { 1640 return (parameter_annotations_offset >= 0); 1641 } 1642 1643 oop java_lang_reflect_Method::parameter_annotations(oop method) { 1644 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1645 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 1646 return method->obj_field(parameter_annotations_offset); 1647 } 1648 1649 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 1650 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1651 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 1652 method->obj_field_put(parameter_annotations_offset, value); 1653 } 1654 1655 bool java_lang_reflect_Method::has_annotation_default_field() { 1656 return (annotation_default_offset >= 0); 1657 } 1658 1659 oop java_lang_reflect_Method::annotation_default(oop method) { 1660 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1661 assert(has_annotation_default_field(), "annotation default field must be present"); 1662 return method->obj_field(annotation_default_offset); 1663 } 1664 1665 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 1666 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1667 assert(has_annotation_default_field(), "annotation default field must be present"); 1668 method->obj_field_put(annotation_default_offset, value); 1669 } 1670 1671 void java_lang_reflect_Constructor::compute_offsets() { 1672 klassOop k = SystemDictionary::reflect_constructor_klass(); 1673 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 1674 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 1675 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 1676 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 1677 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 1678 // The generic signature and annotations fields are only present in 1.5 1679 signature_offset = -1; 1680 annotations_offset = -1; 1681 parameter_annotations_offset = -1; 1682 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 1683 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 1684 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 1685 } 1686 1687 Handle java_lang_reflect_Constructor::create(TRAPS) { 1688 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1689 symbolHandle name = vmSymbolHandles::java_lang_reflect_Constructor(); 1690 klassOop k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 1691 instanceKlassHandle klass (THREAD, k); 1692 // Ensure it is initialized 1693 klass->initialize(CHECK_NH); 1694 return klass->allocate_instance_handle(CHECK_NH); 1695 } 1696 1697 oop java_lang_reflect_Constructor::clazz(oop reflect) { 1698 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1699 return reflect->obj_field(clazz_offset); 1700 } 1701 1702 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 1703 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1704 reflect->obj_field_put(clazz_offset, value); 1705 } 1706 1707 oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 1708 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1709 return constructor->obj_field(parameterTypes_offset); 1710 } 1711 1712 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 1713 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1714 constructor->obj_field_put(parameterTypes_offset, value); 1715 } 1716 1717 oop java_lang_reflect_Constructor::exception_types(oop constructor) { 1718 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1719 return constructor->obj_field(exceptionTypes_offset); 1720 } 1721 1722 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 1723 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1724 constructor->obj_field_put(exceptionTypes_offset, value); 1725 } 1726 1727 int java_lang_reflect_Constructor::slot(oop reflect) { 1728 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1729 return reflect->int_field(slot_offset); 1730 } 1731 1732 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 1733 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1734 reflect->int_field_put(slot_offset, value); 1735 } 1736 1737 int java_lang_reflect_Constructor::modifiers(oop constructor) { 1738 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1739 return constructor->int_field(modifiers_offset); 1740 } 1741 1742 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 1743 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1744 constructor->int_field_put(modifiers_offset, value); 1745 } 1746 1747 bool java_lang_reflect_Constructor::has_signature_field() { 1748 return (signature_offset >= 0); 1749 } 1750 1751 oop java_lang_reflect_Constructor::signature(oop constructor) { 1752 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1753 assert(has_signature_field(), "signature field must be present"); 1754 return constructor->obj_field(signature_offset); 1755 } 1756 1757 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 1758 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1759 assert(has_signature_field(), "signature field must be present"); 1760 constructor->obj_field_put(signature_offset, value); 1761 } 1762 1763 bool java_lang_reflect_Constructor::has_annotations_field() { 1764 return (annotations_offset >= 0); 1765 } 1766 1767 oop java_lang_reflect_Constructor::annotations(oop constructor) { 1768 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1769 assert(has_annotations_field(), "annotations field must be present"); 1770 return constructor->obj_field(annotations_offset); 1771 } 1772 1773 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 1774 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1775 assert(has_annotations_field(), "annotations field must be present"); 1776 constructor->obj_field_put(annotations_offset, value); 1777 } 1778 1779 bool java_lang_reflect_Constructor::has_parameter_annotations_field() { 1780 return (parameter_annotations_offset >= 0); 1781 } 1782 1783 oop java_lang_reflect_Constructor::parameter_annotations(oop method) { 1784 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1785 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 1786 return method->obj_field(parameter_annotations_offset); 1787 } 1788 1789 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 1790 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1791 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 1792 method->obj_field_put(parameter_annotations_offset, value); 1793 } 1794 1795 void java_lang_reflect_Field::compute_offsets() { 1796 klassOop k = SystemDictionary::reflect_field_klass(); 1797 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 1798 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1799 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature()); 1800 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 1801 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 1802 // The generic signature and annotations fields are only present in 1.5 1803 signature_offset = -1; 1804 annotations_offset = -1; 1805 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 1806 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 1807 } 1808 1809 Handle java_lang_reflect_Field::create(TRAPS) { 1810 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1811 symbolHandle name = vmSymbolHandles::java_lang_reflect_Field(); 1812 klassOop k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 1813 instanceKlassHandle klass (THREAD, k); 1814 // Ensure it is initialized 1815 klass->initialize(CHECK_NH); 1816 return klass->allocate_instance_handle(CHECK_NH); 1817 } 1818 1819 oop java_lang_reflect_Field::clazz(oop reflect) { 1820 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1821 return reflect->obj_field(clazz_offset); 1822 } 1823 1824 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 1825 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1826 reflect->obj_field_put(clazz_offset, value); 1827 } 1828 1829 oop java_lang_reflect_Field::name(oop field) { 1830 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1831 return field->obj_field(name_offset); 1832 } 1833 1834 void java_lang_reflect_Field::set_name(oop field, oop value) { 1835 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1836 field->obj_field_put(name_offset, value); 1837 } 1838 1839 oop java_lang_reflect_Field::type(oop field) { 1840 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1841 return field->obj_field(type_offset); 1842 } 1843 1844 void java_lang_reflect_Field::set_type(oop field, oop value) { 1845 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1846 field->obj_field_put(type_offset, value); 1847 } 1848 1849 int java_lang_reflect_Field::slot(oop reflect) { 1850 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1851 return reflect->int_field(slot_offset); 1852 } 1853 1854 void java_lang_reflect_Field::set_slot(oop reflect, int value) { 1855 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1856 reflect->int_field_put(slot_offset, value); 1857 } 1858 1859 int java_lang_reflect_Field::modifiers(oop field) { 1860 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1861 return field->int_field(modifiers_offset); 1862 } 1863 1864 void java_lang_reflect_Field::set_modifiers(oop field, int value) { 1865 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1866 field->int_field_put(modifiers_offset, value); 1867 } 1868 1869 bool java_lang_reflect_Field::has_signature_field() { 1870 return (signature_offset >= 0); 1871 } 1872 1873 oop java_lang_reflect_Field::signature(oop field) { 1874 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1875 assert(has_signature_field(), "signature field must be present"); 1876 return field->obj_field(signature_offset); 1877 } 1878 1879 void java_lang_reflect_Field::set_signature(oop field, oop value) { 1880 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1881 assert(has_signature_field(), "signature field must be present"); 1882 field->obj_field_put(signature_offset, value); 1883 } 1884 1885 bool java_lang_reflect_Field::has_annotations_field() { 1886 return (annotations_offset >= 0); 1887 } 1888 1889 oop java_lang_reflect_Field::annotations(oop field) { 1890 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1891 assert(has_annotations_field(), "annotations field must be present"); 1892 return field->obj_field(annotations_offset); 1893 } 1894 1895 void java_lang_reflect_Field::set_annotations(oop field, oop value) { 1896 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1897 assert(has_annotations_field(), "annotations field must be present"); 1898 field->obj_field_put(annotations_offset, value); 1899 } 1900 1901 1902 void sun_reflect_ConstantPool::compute_offsets() { 1903 klassOop k = SystemDictionary::reflect_constant_pool_klass(); 1904 // This null test can be removed post beta 1905 if (k != NULL) { 1906 compute_offset(_cp_oop_offset, k, vmSymbols::constantPoolOop_name(), vmSymbols::object_signature()); 1907 } 1908 } 1909 1910 1911 Handle sun_reflect_ConstantPool::create(TRAPS) { 1912 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1913 klassOop k = SystemDictionary::reflect_constant_pool_klass(); 1914 instanceKlassHandle klass (THREAD, k); 1915 // Ensure it is initialized 1916 klass->initialize(CHECK_NH); 1917 return klass->allocate_instance_handle(CHECK_NH); 1918 } 1919 1920 1921 oop sun_reflect_ConstantPool::cp_oop(oop reflect) { 1922 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1923 return reflect->obj_field(_cp_oop_offset); 1924 } 1925 1926 1927 void sun_reflect_ConstantPool::set_cp_oop(oop reflect, oop value) { 1928 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1929 reflect->obj_field_put(_cp_oop_offset, value); 1930 } 1931 1932 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() { 1933 klassOop k = SystemDictionary::reflect_unsafe_static_field_accessor_impl_klass(); 1934 // This null test can be removed post beta 1935 if (k != NULL) { 1936 compute_offset(_base_offset, k, 1937 vmSymbols::base_name(), vmSymbols::object_signature()); 1938 } 1939 } 1940 1941 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 1942 klassOop k = SystemDictionary::box_klass(type); 1943 if (k == NULL) return NULL; 1944 instanceKlassHandle h (THREAD, k); 1945 if (!h->is_initialized()) h->initialize(CHECK_0); 1946 return h->allocate_instance(THREAD); 1947 } 1948 1949 1950 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 1951 oop box = initialize_and_allocate(type, CHECK_0); 1952 if (box == NULL) return NULL; 1953 switch (type) { 1954 case T_BOOLEAN: 1955 box->bool_field_put(value_offset, value->z); 1956 break; 1957 case T_CHAR: 1958 box->char_field_put(value_offset, value->c); 1959 break; 1960 case T_FLOAT: 1961 box->float_field_put(value_offset, value->f); 1962 break; 1963 case T_DOUBLE: 1964 box->double_field_put(long_value_offset, value->d); 1965 break; 1966 case T_BYTE: 1967 box->byte_field_put(value_offset, value->b); 1968 break; 1969 case T_SHORT: 1970 box->short_field_put(value_offset, value->s); 1971 break; 1972 case T_INT: 1973 box->int_field_put(value_offset, value->i); 1974 break; 1975 case T_LONG: 1976 box->long_field_put(long_value_offset, value->j); 1977 break; 1978 default: 1979 return NULL; 1980 } 1981 return box; 1982 } 1983 1984 1985 BasicType java_lang_boxing_object::basic_type(oop box) { 1986 if (box == NULL) return T_ILLEGAL; 1987 BasicType type = SystemDictionary::box_klass_type(box->klass()); 1988 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 1989 return T_ILLEGAL; 1990 return type; 1991 } 1992 1993 1994 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 1995 BasicType type = SystemDictionary::box_klass_type(box->klass()); 1996 switch (type) { 1997 case T_BOOLEAN: 1998 value->z = box->bool_field(value_offset); 1999 break; 2000 case T_CHAR: 2001 value->c = box->char_field(value_offset); 2002 break; 2003 case T_FLOAT: 2004 value->f = box->float_field(value_offset); 2005 break; 2006 case T_DOUBLE: 2007 value->d = box->double_field(long_value_offset); 2008 break; 2009 case T_BYTE: 2010 value->b = box->byte_field(value_offset); 2011 break; 2012 case T_SHORT: 2013 value->s = box->short_field(value_offset); 2014 break; 2015 case T_INT: 2016 value->i = box->int_field(value_offset); 2017 break; 2018 case T_LONG: 2019 value->j = box->long_field(long_value_offset); 2020 break; 2021 default: 2022 return T_ILLEGAL; 2023 } // end switch 2024 return type; 2025 } 2026 2027 2028 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 2029 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2030 switch (type) { 2031 case T_BOOLEAN: 2032 box->bool_field_put(value_offset, value->z); 2033 break; 2034 case T_CHAR: 2035 box->char_field_put(value_offset, value->c); 2036 break; 2037 case T_FLOAT: 2038 box->float_field_put(value_offset, value->f); 2039 break; 2040 case T_DOUBLE: 2041 box->double_field_put(long_value_offset, value->d); 2042 break; 2043 case T_BYTE: 2044 box->byte_field_put(value_offset, value->b); 2045 break; 2046 case T_SHORT: 2047 box->short_field_put(value_offset, value->s); 2048 break; 2049 case T_INT: 2050 box->int_field_put(value_offset, value->i); 2051 break; 2052 case T_LONG: 2053 box->long_field_put(long_value_offset, value->j); 2054 break; 2055 default: 2056 return T_ILLEGAL; 2057 } // end switch 2058 return type; 2059 } 2060 2061 2062 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) { 2063 switch (type) { 2064 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break; 2065 case T_CHAR: st->print("%d", value->c); break; 2066 case T_BYTE: st->print("%d", value->b); break; 2067 case T_SHORT: st->print("%d", value->s); break; 2068 case T_INT: st->print("%d", value->i); break; 2069 case T_LONG: st->print(INT64_FORMAT, value->j); break; 2070 case T_FLOAT: st->print("%f", value->f); break; 2071 case T_DOUBLE: st->print("%lf", value->d); break; 2072 default: st->print("type %d?", type); break; 2073 } 2074 } 2075 2076 2077 // Support for java_lang_ref_Reference 2078 oop java_lang_ref_Reference::pending_list_lock() { 2079 instanceKlass* ik = instanceKlass::cast(SystemDictionary::reference_klass()); 2080 char *addr = (((char *)ik->start_of_static_fields()) + static_lock_offset); 2081 if (UseCompressedOops) { 2082 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 2083 } else { 2084 return oopDesc::load_decode_heap_oop((oop*)addr); 2085 } 2086 } 2087 2088 HeapWord *java_lang_ref_Reference::pending_list_addr() { 2089 instanceKlass* ik = instanceKlass::cast(SystemDictionary::reference_klass()); 2090 char *addr = (((char *)ik->start_of_static_fields()) + static_pending_offset); 2091 // XXX This might not be HeapWord aligned, almost rather be char *. 2092 return (HeapWord*)addr; 2093 } 2094 2095 oop java_lang_ref_Reference::pending_list() { 2096 char *addr = (char *)pending_list_addr(); 2097 if (UseCompressedOops) { 2098 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 2099 } else { 2100 return oopDesc::load_decode_heap_oop((oop*)addr); 2101 } 2102 } 2103 2104 2105 // Support for java_lang_ref_SoftReference 2106 2107 jlong java_lang_ref_SoftReference::timestamp(oop ref) { 2108 return ref->long_field(timestamp_offset); 2109 } 2110 2111 jlong java_lang_ref_SoftReference::clock() { 2112 instanceKlass* ik = instanceKlass::cast(SystemDictionary::soft_reference_klass()); 2113 int offset = ik->offset_of_static_fields() + static_clock_offset; 2114 2115 return SystemDictionary::soft_reference_klass()->long_field(offset); 2116 } 2117 2118 void java_lang_ref_SoftReference::set_clock(jlong value) { 2119 instanceKlass* ik = instanceKlass::cast(SystemDictionary::soft_reference_klass()); 2120 int offset = ik->offset_of_static_fields() + static_clock_offset; 2121 2122 SystemDictionary::soft_reference_klass()->long_field_put(offset, value); 2123 } 2124 2125 2126 // Support for java_dyn_MethodHandle 2127 2128 int java_dyn_MethodHandle::_type_offset; 2129 int java_dyn_MethodHandle::_vmtarget_offset; 2130 int java_dyn_MethodHandle::_vmentry_offset; 2131 int java_dyn_MethodHandle::_vmslots_offset; 2132 2133 int sun_dyn_MemberName::_clazz_offset; 2134 int sun_dyn_MemberName::_name_offset; 2135 int sun_dyn_MemberName::_type_offset; 2136 int sun_dyn_MemberName::_flags_offset; 2137 int sun_dyn_MemberName::_vmtarget_offset; 2138 int sun_dyn_MemberName::_vmindex_offset; 2139 2140 int sun_dyn_DirectMethodHandle::_vmindex_offset; 2141 2142 int sun_dyn_BoundMethodHandle::_argument_offset; 2143 int sun_dyn_BoundMethodHandle::_vmargslot_offset; 2144 2145 int sun_dyn_AdapterMethodHandle::_conversion_offset; 2146 2147 void java_dyn_MethodHandle::compute_offsets() { 2148 klassOop k = SystemDictionary::MethodHandle_klass(); 2149 if (k != NULL && EnableMethodHandles) { 2150 compute_offset(_type_offset, k, vmSymbols::type_name(), vmSymbols::java_dyn_MethodType_signature(), true); 2151 compute_offset(_vmtarget_offset, k, vmSymbols::vmtarget_name(), vmSymbols::object_signature(), true); 2152 compute_offset(_vmentry_offset, k, vmSymbols::vmentry_name(), vmSymbols::machine_word_signature(), true); 2153 2154 // Note: MH.vmslots (if it is present) is a hoisted copy of MH.type.form.vmslots. 2155 // It is optional pending experiments to keep or toss. 2156 compute_optional_offset(_vmslots_offset, k, vmSymbols::vmslots_name(), vmSymbols::int_signature(), true); 2157 } 2158 } 2159 2160 void sun_dyn_MemberName::compute_offsets() { 2161 klassOop k = SystemDictionary::MemberName_klass(); 2162 if (k != NULL && EnableMethodHandles) { 2163 compute_offset(_clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2164 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2165 compute_offset(_type_offset, k, vmSymbols::type_name(), vmSymbols::object_signature()); 2166 compute_offset(_flags_offset, k, vmSymbols::flags_name(), vmSymbols::int_signature()); 2167 compute_offset(_vmtarget_offset, k, vmSymbols::vmtarget_name(), vmSymbols::object_signature()); 2168 compute_offset(_vmindex_offset, k, vmSymbols::vmindex_name(), vmSymbols::int_signature()); 2169 } 2170 } 2171 2172 void sun_dyn_DirectMethodHandle::compute_offsets() { 2173 klassOop k = SystemDictionary::DirectMethodHandle_klass(); 2174 if (k != NULL && EnableMethodHandles) { 2175 compute_offset(_vmindex_offset, k, vmSymbols::vmindex_name(), vmSymbols::int_signature(), true); 2176 } 2177 } 2178 2179 void sun_dyn_BoundMethodHandle::compute_offsets() { 2180 klassOop k = SystemDictionary::BoundMethodHandle_klass(); 2181 if (k != NULL && EnableMethodHandles) { 2182 compute_offset(_vmargslot_offset, k, vmSymbols::vmargslot_name(), vmSymbols::int_signature(), true); 2183 compute_offset(_argument_offset, k, vmSymbols::argument_name(), vmSymbols::object_signature(), true); 2184 } 2185 } 2186 2187 void sun_dyn_AdapterMethodHandle::compute_offsets() { 2188 klassOop k = SystemDictionary::AdapterMethodHandle_klass(); 2189 if (k != NULL && EnableMethodHandles) { 2190 compute_offset(_conversion_offset, k, vmSymbols::conversion_name(), vmSymbols::int_signature(), true); 2191 } 2192 } 2193 2194 oop java_dyn_MethodHandle::type(oop mh) { 2195 return mh->obj_field(_type_offset); 2196 } 2197 2198 void java_dyn_MethodHandle::set_type(oop mh, oop mtype) { 2199 mh->obj_field_put(_type_offset, mtype); 2200 } 2201 2202 int java_dyn_MethodHandle::vmslots(oop mh) { 2203 int vmslots_offset = _vmslots_offset; 2204 if (vmslots_offset != 0) { 2205 #ifdef ASSERT 2206 int x = mh->int_field(vmslots_offset); 2207 int y = compute_vmslots(mh); 2208 assert(x == y, "correct hoisted value"); 2209 #endif 2210 return mh->int_field(vmslots_offset); 2211 } else { 2212 return compute_vmslots(mh); 2213 } 2214 } 2215 2216 // if MH.vmslots exists, hoist into it the value of type.form.vmslots 2217 void java_dyn_MethodHandle::init_vmslots(oop mh) { 2218 int vmslots_offset = _vmslots_offset; 2219 if (vmslots_offset != 0) { 2220 mh->int_field_put(vmslots_offset, compute_vmslots(mh)); 2221 } 2222 } 2223 2224 // fetch type.form.vmslots, which is the number of JVM stack slots 2225 // required to carry the arguments of this MH 2226 int java_dyn_MethodHandle::compute_vmslots(oop mh) { 2227 oop mtype = type(mh); 2228 if (mtype == NULL) return 0; // Java code would get NPE 2229 oop form = java_dyn_MethodType::form(mtype); 2230 if (form == NULL) return 0; // Java code would get NPE 2231 return java_dyn_MethodTypeForm::vmslots(form); 2232 } 2233 2234 // fetch the low-level entry point for this mh 2235 MethodHandleEntry* java_dyn_MethodHandle::vmentry(oop mh) { 2236 return (MethodHandleEntry*) mh->address_field(_vmentry_offset); 2237 } 2238 2239 void java_dyn_MethodHandle::set_vmentry(oop mh, MethodHandleEntry* me) { 2240 assert(_vmentry_offset != 0, "must be present"); 2241 2242 // This is always the final step that initializes a valid method handle: 2243 mh->release_address_field_put(_vmentry_offset, (address) me); 2244 2245 // There should be enough memory barriers on exit from native methods 2246 // to ensure that the MH is fully initialized to all threads before 2247 // Java code can publish it in global data structures. 2248 // But just in case, we use release_address_field_put. 2249 } 2250 2251 /// MemberName accessors 2252 2253 oop sun_dyn_MemberName::clazz(oop mname) { 2254 assert(is_instance(mname), "wrong type"); 2255 return mname->obj_field(_clazz_offset); 2256 } 2257 2258 void sun_dyn_MemberName::set_clazz(oop mname, oop clazz) { 2259 assert(is_instance(mname), "wrong type"); 2260 mname->obj_field_put(_clazz_offset, clazz); 2261 } 2262 2263 oop sun_dyn_MemberName::name(oop mname) { 2264 assert(is_instance(mname), "wrong type"); 2265 return mname->obj_field(_name_offset); 2266 } 2267 2268 void sun_dyn_MemberName::set_name(oop mname, oop name) { 2269 assert(is_instance(mname), "wrong type"); 2270 mname->obj_field_put(_name_offset, name); 2271 } 2272 2273 oop sun_dyn_MemberName::type(oop mname) { 2274 assert(is_instance(mname), "wrong type"); 2275 return mname->obj_field(_type_offset); 2276 } 2277 2278 void sun_dyn_MemberName::set_type(oop mname, oop type) { 2279 assert(is_instance(mname), "wrong type"); 2280 mname->obj_field_put(_type_offset, type); 2281 } 2282 2283 int sun_dyn_MemberName::flags(oop mname) { 2284 assert(is_instance(mname), "wrong type"); 2285 return mname->int_field(_flags_offset); 2286 } 2287 2288 void sun_dyn_MemberName::set_flags(oop mname, int flags) { 2289 assert(is_instance(mname), "wrong type"); 2290 mname->int_field_put(_flags_offset, flags); 2291 } 2292 2293 oop sun_dyn_MemberName::vmtarget(oop mname) { 2294 assert(is_instance(mname), "wrong type"); 2295 return mname->obj_field(_vmtarget_offset); 2296 } 2297 2298 void sun_dyn_MemberName::set_vmtarget(oop mname, oop ref) { 2299 assert(is_instance(mname), "wrong type"); 2300 mname->obj_field_put(_vmtarget_offset, ref); 2301 } 2302 2303 int sun_dyn_MemberName::vmindex(oop mname) { 2304 assert(is_instance(mname), "wrong type"); 2305 return mname->int_field(_vmindex_offset); 2306 } 2307 2308 void sun_dyn_MemberName::set_vmindex(oop mname, int index) { 2309 assert(is_instance(mname), "wrong type"); 2310 mname->int_field_put(_vmindex_offset, index); 2311 } 2312 2313 oop java_dyn_MethodHandle::vmtarget(oop mh) { 2314 assert(is_instance(mh), "MH only"); 2315 return mh->obj_field(_vmtarget_offset); 2316 } 2317 2318 void java_dyn_MethodHandle::set_vmtarget(oop mh, oop ref) { 2319 assert(is_instance(mh), "MH only"); 2320 mh->obj_field_put(_vmtarget_offset, ref); 2321 } 2322 2323 int sun_dyn_DirectMethodHandle::vmindex(oop mh) { 2324 assert(is_instance(mh), "DMH only"); 2325 return mh->int_field(_vmindex_offset); 2326 } 2327 2328 void sun_dyn_DirectMethodHandle::set_vmindex(oop mh, int index) { 2329 assert(is_instance(mh), "DMH only"); 2330 mh->int_field_put(_vmindex_offset, index); 2331 } 2332 2333 int sun_dyn_BoundMethodHandle::vmargslot(oop mh) { 2334 assert(is_instance(mh), "BMH only"); 2335 return mh->int_field(_vmargslot_offset); 2336 } 2337 2338 oop sun_dyn_BoundMethodHandle::argument(oop mh) { 2339 assert(is_instance(mh), "BMH only"); 2340 return mh->obj_field(_argument_offset); 2341 } 2342 2343 int sun_dyn_AdapterMethodHandle::conversion(oop mh) { 2344 assert(is_instance(mh), "AMH only"); 2345 return mh->int_field(_conversion_offset); 2346 } 2347 2348 void sun_dyn_AdapterMethodHandle::set_conversion(oop mh, int conv) { 2349 assert(is_instance(mh), "AMH only"); 2350 mh->int_field_put(_conversion_offset, conv); 2351 } 2352 2353 2354 // Support for java_dyn_MethodType 2355 2356 int java_dyn_MethodType::_rtype_offset; 2357 int java_dyn_MethodType::_ptypes_offset; 2358 int java_dyn_MethodType::_form_offset; 2359 2360 void java_dyn_MethodType::compute_offsets() { 2361 klassOop k = SystemDictionary::MethodType_klass(); 2362 if (k != NULL) { 2363 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature()); 2364 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature()); 2365 compute_offset(_form_offset, k, vmSymbols::form_name(), vmSymbols::java_dyn_MethodTypeForm_signature()); 2366 } 2367 } 2368 2369 void java_dyn_MethodType::print_signature(oop mt, outputStream* st) { 2370 st->print("("); 2371 objArrayOop pts = ptypes(mt); 2372 for (int i = 0, limit = pts->length(); i < limit; i++) { 2373 java_lang_Class::print_signature(pts->obj_at(i), st); 2374 } 2375 st->print(")"); 2376 java_lang_Class::print_signature(rtype(mt), st); 2377 } 2378 2379 symbolOop java_dyn_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) { 2380 ResourceMark rm; 2381 stringStream buffer(128); 2382 print_signature(mt, &buffer); 2383 const char* sigstr = buffer.base(); 2384 int siglen = (int) buffer.size(); 2385 if (!intern_if_not_found) 2386 return SymbolTable::probe(sigstr, siglen); 2387 else 2388 return oopFactory::new_symbol(sigstr, siglen, THREAD); 2389 } 2390 2391 oop java_dyn_MethodType::rtype(oop mt) { 2392 assert(is_instance(mt), "must be a MethodType"); 2393 return mt->obj_field(_rtype_offset); 2394 } 2395 2396 objArrayOop java_dyn_MethodType::ptypes(oop mt) { 2397 assert(is_instance(mt), "must be a MethodType"); 2398 return (objArrayOop) mt->obj_field(_ptypes_offset); 2399 } 2400 2401 oop java_dyn_MethodType::form(oop mt) { 2402 assert(is_instance(mt), "must be a MethodType"); 2403 return mt->obj_field(_form_offset); 2404 } 2405 2406 oop java_dyn_MethodType::ptype(oop mt, int idx) { 2407 return ptypes(mt)->obj_at(idx); 2408 } 2409 2410 2411 2412 // Support for java_dyn_MethodTypeForm 2413 2414 int java_dyn_MethodTypeForm::_vmslots_offset; 2415 int java_dyn_MethodTypeForm::_erasedType_offset; 2416 2417 void java_dyn_MethodTypeForm::compute_offsets() { 2418 klassOop k = SystemDictionary::MethodTypeForm_klass(); 2419 if (k != NULL) { 2420 compute_optional_offset(_vmslots_offset, k, vmSymbols::vmslots_name(), vmSymbols::int_signature(), true); 2421 compute_optional_offset(_erasedType_offset, k, vmSymbols::erasedType_name(), vmSymbols::java_dyn_MethodType_signature(), true); 2422 } 2423 } 2424 2425 int java_dyn_MethodTypeForm::vmslots(oop mtform) { 2426 assert(mtform->klass() == SystemDictionary::MethodTypeForm_klass(), "MTForm only"); 2427 return mtform->int_field(_vmslots_offset); 2428 } 2429 2430 oop java_dyn_MethodTypeForm::erasedType(oop mtform) { 2431 assert(mtform->klass() == SystemDictionary::MethodTypeForm_klass(), "MTForm only"); 2432 return mtform->obj_field(_erasedType_offset); 2433 } 2434 2435 2436 // Support for sun_dyn_CallSiteImpl 2437 2438 int sun_dyn_CallSiteImpl::_type_offset; 2439 int sun_dyn_CallSiteImpl::_target_offset; 2440 int sun_dyn_CallSiteImpl::_vmmethod_offset; 2441 2442 void sun_dyn_CallSiteImpl::compute_offsets() { 2443 if (!EnableInvokeDynamic) return; 2444 klassOop k = SystemDictionary::CallSiteImpl_klass(); 2445 if (k != NULL) { 2446 compute_offset(_type_offset, k, vmSymbols::type_name(), vmSymbols::java_dyn_MethodType_signature(), true); 2447 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_dyn_MethodHandle_signature(), true); 2448 compute_offset(_vmmethod_offset, k, vmSymbols::vmmethod_name(), vmSymbols::object_signature(), true); 2449 } 2450 } 2451 2452 oop sun_dyn_CallSiteImpl::type(oop site) { 2453 return site->obj_field(_type_offset); 2454 } 2455 2456 oop sun_dyn_CallSiteImpl::target(oop site) { 2457 return site->obj_field(_target_offset); 2458 } 2459 2460 void sun_dyn_CallSiteImpl::set_target(oop site, oop target) { 2461 site->obj_field_put(_target_offset, target); 2462 } 2463 2464 oop sun_dyn_CallSiteImpl::vmmethod(oop site) { 2465 return site->obj_field(_vmmethod_offset); 2466 } 2467 2468 void sun_dyn_CallSiteImpl::set_vmmethod(oop site, oop ref) { 2469 site->obj_field_put(_vmmethod_offset, ref); 2470 } 2471 2472 2473 // Support for java_security_AccessControlContext 2474 2475 int java_security_AccessControlContext::_context_offset = 0; 2476 int java_security_AccessControlContext::_privilegedContext_offset = 0; 2477 int java_security_AccessControlContext::_isPrivileged_offset = 0; 2478 2479 void java_security_AccessControlContext::compute_offsets() { 2480 assert(_isPrivileged_offset == 0, "offsets should be initialized only once"); 2481 fieldDescriptor fd; 2482 instanceKlass* ik = instanceKlass::cast(SystemDictionary::AccessControlContext_klass()); 2483 2484 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) { 2485 fatal("Invalid layout of java.security.AccessControlContext"); 2486 } 2487 _context_offset = fd.offset(); 2488 2489 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) { 2490 fatal("Invalid layout of java.security.AccessControlContext"); 2491 } 2492 _privilegedContext_offset = fd.offset(); 2493 2494 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) { 2495 fatal("Invalid layout of java.security.AccessControlContext"); 2496 } 2497 _isPrivileged_offset = fd.offset(); 2498 } 2499 2500 2501 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) { 2502 assert(_isPrivileged_offset != 0, "offsets should have been initialized"); 2503 // Ensure klass is initialized 2504 instanceKlass::cast(SystemDictionary::AccessControlContext_klass())->initialize(CHECK_0); 2505 // Allocate result 2506 oop result = instanceKlass::cast(SystemDictionary::AccessControlContext_klass())->allocate_instance(CHECK_0); 2507 // Fill in values 2508 result->obj_field_put(_context_offset, context()); 2509 result->obj_field_put(_privilegedContext_offset, privileged_context()); 2510 result->bool_field_put(_isPrivileged_offset, isPrivileged); 2511 return result; 2512 } 2513 2514 2515 // Support for java_lang_ClassLoader 2516 2517 oop java_lang_ClassLoader::parent(oop loader) { 2518 assert(loader->is_oop(), "loader must be oop"); 2519 return loader->obj_field(parent_offset); 2520 } 2521 2522 2523 bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 2524 // Fix for 4474172; see evaluation for more details 2525 loader = non_reflection_class_loader(loader); 2526 2527 oop cl = SystemDictionary::java_system_loader(); 2528 while(cl != NULL) { 2529 if (cl == loader) return true; 2530 cl = parent(cl); 2531 } 2532 return false; 2533 } 2534 2535 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) { 2536 if (loader != NULL) { 2537 // See whether this is one of the class loaders associated with 2538 // the generated bytecodes for reflection, and if so, "magically" 2539 // delegate to its parent to prevent class loading from occurring 2540 // in places where applications using reflection didn't expect it. 2541 klassOop delegating_cl_class = SystemDictionary::reflect_delegating_classloader_klass(); 2542 // This might be null in non-1.4 JDKs 2543 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) { 2544 return parent(loader); 2545 } 2546 } 2547 return loader; 2548 } 2549 2550 2551 // Support for java_lang_System 2552 2553 void java_lang_System::compute_offsets() { 2554 assert(offset_of_static_fields == 0, "offsets should be initialized only once"); 2555 2556 instanceKlass* ik = instanceKlass::cast(SystemDictionary::system_klass()); 2557 offset_of_static_fields = ik->offset_of_static_fields(); 2558 } 2559 2560 int java_lang_System::in_offset_in_bytes() { 2561 return (offset_of_static_fields + static_in_offset); 2562 } 2563 2564 2565 int java_lang_System::out_offset_in_bytes() { 2566 return (offset_of_static_fields + static_out_offset); 2567 } 2568 2569 2570 int java_lang_System::err_offset_in_bytes() { 2571 return (offset_of_static_fields + static_err_offset); 2572 } 2573 2574 2575 2576 int java_lang_String::value_offset; 2577 int java_lang_String::offset_offset; 2578 int java_lang_String::count_offset; 2579 int java_lang_String::hash_offset; 2580 int java_lang_Class::klass_offset; 2581 int java_lang_Class::array_klass_offset; 2582 int java_lang_Class::resolved_constructor_offset; 2583 int java_lang_Class::number_of_fake_oop_fields; 2584 int java_lang_Throwable::backtrace_offset; 2585 int java_lang_Throwable::detailMessage_offset; 2586 int java_lang_Throwable::cause_offset; 2587 int java_lang_Throwable::stackTrace_offset; 2588 int java_lang_reflect_AccessibleObject::override_offset; 2589 int java_lang_reflect_Method::clazz_offset; 2590 int java_lang_reflect_Method::name_offset; 2591 int java_lang_reflect_Method::returnType_offset; 2592 int java_lang_reflect_Method::parameterTypes_offset; 2593 int java_lang_reflect_Method::exceptionTypes_offset; 2594 int java_lang_reflect_Method::slot_offset; 2595 int java_lang_reflect_Method::modifiers_offset; 2596 int java_lang_reflect_Method::signature_offset; 2597 int java_lang_reflect_Method::annotations_offset; 2598 int java_lang_reflect_Method::parameter_annotations_offset; 2599 int java_lang_reflect_Method::annotation_default_offset; 2600 int java_lang_reflect_Constructor::clazz_offset; 2601 int java_lang_reflect_Constructor::parameterTypes_offset; 2602 int java_lang_reflect_Constructor::exceptionTypes_offset; 2603 int java_lang_reflect_Constructor::slot_offset; 2604 int java_lang_reflect_Constructor::modifiers_offset; 2605 int java_lang_reflect_Constructor::signature_offset; 2606 int java_lang_reflect_Constructor::annotations_offset; 2607 int java_lang_reflect_Constructor::parameter_annotations_offset; 2608 int java_lang_reflect_Field::clazz_offset; 2609 int java_lang_reflect_Field::name_offset; 2610 int java_lang_reflect_Field::type_offset; 2611 int java_lang_reflect_Field::slot_offset; 2612 int java_lang_reflect_Field::modifiers_offset; 2613 int java_lang_reflect_Field::signature_offset; 2614 int java_lang_reflect_Field::annotations_offset; 2615 int java_lang_boxing_object::value_offset; 2616 int java_lang_boxing_object::long_value_offset; 2617 int java_lang_ref_Reference::referent_offset; 2618 int java_lang_ref_Reference::queue_offset; 2619 int java_lang_ref_Reference::next_offset; 2620 int java_lang_ref_Reference::discovered_offset; 2621 int java_lang_ref_Reference::static_lock_offset; 2622 int java_lang_ref_Reference::static_pending_offset; 2623 int java_lang_ref_Reference::number_of_fake_oop_fields; 2624 int java_lang_ref_SoftReference::timestamp_offset; 2625 int java_lang_ref_SoftReference::static_clock_offset; 2626 int java_lang_ClassLoader::parent_offset; 2627 int java_lang_System::offset_of_static_fields; 2628 int java_lang_System::static_in_offset; 2629 int java_lang_System::static_out_offset; 2630 int java_lang_System::static_err_offset; 2631 int java_lang_StackTraceElement::declaringClass_offset; 2632 int java_lang_StackTraceElement::methodName_offset; 2633 int java_lang_StackTraceElement::fileName_offset; 2634 int java_lang_StackTraceElement::lineNumber_offset; 2635 int java_lang_AssertionStatusDirectives::classes_offset; 2636 int java_lang_AssertionStatusDirectives::classEnabled_offset; 2637 int java_lang_AssertionStatusDirectives::packages_offset; 2638 int java_lang_AssertionStatusDirectives::packageEnabled_offset; 2639 int java_lang_AssertionStatusDirectives::deflt_offset; 2640 int java_nio_Buffer::_limit_offset; 2641 int sun_misc_AtomicLongCSImpl::_value_offset; 2642 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0; 2643 int sun_reflect_ConstantPool::_cp_oop_offset; 2644 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset; 2645 2646 2647 // Support for java_lang_StackTraceElement 2648 2649 void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 2650 element->obj_field_put(fileName_offset, value); 2651 } 2652 2653 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 2654 element->obj_field_put(declaringClass_offset, value); 2655 } 2656 2657 void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 2658 element->obj_field_put(methodName_offset, value); 2659 } 2660 2661 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 2662 element->int_field_put(lineNumber_offset, value); 2663 } 2664 2665 2666 // Support for java Assertions - java_lang_AssertionStatusDirectives. 2667 2668 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 2669 o->obj_field_put(classes_offset, val); 2670 } 2671 2672 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 2673 o->obj_field_put(classEnabled_offset, val); 2674 } 2675 2676 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 2677 o->obj_field_put(packages_offset, val); 2678 } 2679 2680 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 2681 o->obj_field_put(packageEnabled_offset, val); 2682 } 2683 2684 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 2685 o->bool_field_put(deflt_offset, val); 2686 } 2687 2688 2689 // Support for intrinsification of java.nio.Buffer.checkIndex 2690 int java_nio_Buffer::limit_offset() { 2691 return _limit_offset; 2692 } 2693 2694 2695 void java_nio_Buffer::compute_offsets() { 2696 klassOop k = SystemDictionary::java_nio_Buffer_klass(); 2697 assert(k != NULL, "must be loaded in 1.4+"); 2698 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature()); 2699 } 2700 2701 // Support for intrinsification of sun.misc.AtomicLongCSImpl.attemptUpdate 2702 int sun_misc_AtomicLongCSImpl::value_offset() { 2703 assert(SystemDictionary::sun_misc_AtomicLongCSImpl_klass() != NULL, "can't call this"); 2704 return _value_offset; 2705 } 2706 2707 2708 void sun_misc_AtomicLongCSImpl::compute_offsets() { 2709 klassOop k = SystemDictionary::sun_misc_AtomicLongCSImpl_klass(); 2710 // If this class is not present, its value field offset won't be referenced. 2711 if (k != NULL) { 2712 compute_offset(_value_offset, k, vmSymbols::value_name(), vmSymbols::long_signature()); 2713 } 2714 } 2715 2716 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) { 2717 if (_owner_offset != 0) return; 2718 2719 assert(JDK_Version::is_gte_jdk16x_version(), "Must be JDK 1.6 or later"); 2720 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK); 2721 klassOop k = SystemDictionary::abstract_ownable_synchronizer_klass(); 2722 compute_offset(_owner_offset, k, 2723 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature()); 2724 } 2725 2726 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 2727 assert(_owner_offset != 0, "Must be initialized"); 2728 return obj->obj_field(_owner_offset); 2729 } 2730 2731 // Compute hard-coded offsets 2732 // Invoked before SystemDictionary::initialize, so pre-loaded classes 2733 // are not available to determine the offset_of_static_fields. 2734 void JavaClasses::compute_hard_coded_offsets() { 2735 const int x = heapOopSize; 2736 const int header = instanceOopDesc::base_offset_in_bytes(); 2737 2738 // Do the String Class 2739 java_lang_String::value_offset = java_lang_String::hc_value_offset * x + header; 2740 java_lang_String::offset_offset = java_lang_String::hc_offset_offset * x + header; 2741 java_lang_String::count_offset = java_lang_String::offset_offset + sizeof (jint); 2742 java_lang_String::hash_offset = java_lang_String::count_offset + sizeof (jint); 2743 2744 // Do the Class Class 2745 java_lang_Class::klass_offset = java_lang_Class::hc_klass_offset * x + header; 2746 java_lang_Class::array_klass_offset = java_lang_Class::hc_array_klass_offset * x + header; 2747 java_lang_Class::resolved_constructor_offset = java_lang_Class::hc_resolved_constructor_offset * x + header; 2748 2749 // This is NOT an offset 2750 java_lang_Class::number_of_fake_oop_fields = java_lang_Class::hc_number_of_fake_oop_fields; 2751 2752 // Throwable Class 2753 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header; 2754 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header; 2755 java_lang_Throwable::cause_offset = java_lang_Throwable::hc_cause_offset * x + header; 2756 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header; 2757 2758 // java_lang_boxing_object 2759 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header; 2760 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong); 2761 2762 // java_lang_ref_Reference: 2763 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header; 2764 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header; 2765 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header; 2766 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header; 2767 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x; 2768 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x; 2769 // Artificial fields for java_lang_ref_Reference 2770 // The first field is for the discovered field added in 1.4 2771 java_lang_ref_Reference::number_of_fake_oop_fields = 1; 2772 2773 // java_lang_ref_SoftReference Class 2774 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong); 2775 // Don't multiply static fields because they are always in wordSize units 2776 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x; 2777 2778 // java_lang_ClassLoader 2779 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header; 2780 2781 // java_lang_System 2782 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x; 2783 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x; 2784 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x; 2785 2786 // java_lang_StackTraceElement 2787 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header; 2788 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header; 2789 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header; 2790 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header; 2791 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header; 2792 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header; 2793 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header; 2794 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header; 2795 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header; 2796 2797 } 2798 2799 2800 // Compute non-hard-coded field offsets of all the classes in this file 2801 void JavaClasses::compute_offsets() { 2802 2803 java_lang_Class::compute_offsets(); 2804 java_lang_System::compute_offsets(); 2805 java_lang_Thread::compute_offsets(); 2806 java_lang_ThreadGroup::compute_offsets(); 2807 if (EnableMethodHandles) { 2808 java_dyn_MethodHandle::compute_offsets(); 2809 sun_dyn_MemberName::compute_offsets(); 2810 sun_dyn_DirectMethodHandle::compute_offsets(); 2811 sun_dyn_BoundMethodHandle::compute_offsets(); 2812 sun_dyn_AdapterMethodHandle::compute_offsets(); 2813 java_dyn_MethodType::compute_offsets(); 2814 java_dyn_MethodTypeForm::compute_offsets(); 2815 } 2816 if (EnableInvokeDynamic) { 2817 sun_dyn_CallSiteImpl::compute_offsets(); 2818 } 2819 java_security_AccessControlContext::compute_offsets(); 2820 // Initialize reflection classes. The layouts of these classes 2821 // changed with the new reflection implementation in JDK 1.4, and 2822 // since the Universe doesn't know what JDK version it is until this 2823 // point we defer computation of these offsets until now. 2824 java_lang_reflect_AccessibleObject::compute_offsets(); 2825 java_lang_reflect_Method::compute_offsets(); 2826 java_lang_reflect_Constructor::compute_offsets(); 2827 java_lang_reflect_Field::compute_offsets(); 2828 if (JDK_Version::is_gte_jdk14x_version()) { 2829 java_nio_Buffer::compute_offsets(); 2830 } 2831 if (JDK_Version::is_gte_jdk15x_version()) { 2832 sun_reflect_ConstantPool::compute_offsets(); 2833 sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets(); 2834 } 2835 sun_misc_AtomicLongCSImpl::compute_offsets(); 2836 2837 // generated interpreter code wants to know about the offsets we just computed: 2838 AbstractAssembler::update_delayed_values(); 2839 } 2840 2841 #ifndef PRODUCT 2842 2843 // These functions exist to assert the validity of hard-coded field offsets to guard 2844 // against changes in the class files 2845 2846 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 2847 EXCEPTION_MARK; 2848 fieldDescriptor fd; 2849 symbolHandle klass_sym = oopFactory::new_symbol_handle(klass_name, CATCH); 2850 klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 2851 instanceKlassHandle h_klass (THREAD, k); 2852 //instanceKlassHandle h_klass(klass); 2853 symbolHandle f_name = oopFactory::new_symbol_handle(field_name, CATCH); 2854 symbolHandle f_sig = oopFactory::new_symbol_handle(field_sig, CATCH); 2855 if (!h_klass->find_local_field(f_name(), f_sig(), &fd)) { 2856 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 2857 return false; 2858 } 2859 if (fd.is_static()) { 2860 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 2861 return false; 2862 } 2863 if (fd.offset() == hardcoded_offset ) { 2864 return true; 2865 } else { 2866 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.", 2867 klass_name, field_name, hardcoded_offset, fd.offset()); 2868 return false; 2869 } 2870 } 2871 2872 2873 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 2874 EXCEPTION_MARK; 2875 fieldDescriptor fd; 2876 symbolHandle klass_sym = oopFactory::new_symbol_handle(klass_name, CATCH); 2877 klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 2878 instanceKlassHandle h_klass (THREAD, k); 2879 symbolHandle f_name = oopFactory::new_symbol_handle(field_name, CATCH); 2880 symbolHandle f_sig = oopFactory::new_symbol_handle(field_sig, CATCH); 2881 if (!h_klass->find_local_field(f_name(), f_sig(), &fd)) { 2882 tty->print_cr("Static field %s.%s not found", klass_name, field_name); 2883 return false; 2884 } 2885 if (!fd.is_static()) { 2886 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name); 2887 return false; 2888 } 2889 if (fd.offset() == hardcoded_offset + h_klass->offset_of_static_fields()) { 2890 return true; 2891 } else { 2892 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()); 2893 return false; 2894 } 2895 } 2896 2897 2898 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) { 2899 EXCEPTION_MARK; 2900 fieldDescriptor fd; 2901 symbolHandle klass_sym = oopFactory::new_symbol_handle(klass_name, CATCH); 2902 klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 2903 instanceKlassHandle h_klass (THREAD, k); 2904 symbolHandle f_name = oopFactory::new_symbol_handle(field_name, CATCH); 2905 symbolHandle f_sig = oopFactory::new_symbol_handle(field_sig, CATCH); 2906 if (!h_klass->find_local_field(f_name(), f_sig(), &fd)) { 2907 tty->print_cr("Static field %s.%s not found", klass_name, field_name); 2908 return false; 2909 } 2910 if (!fd.is_static() || !fd.has_initial_value()) { 2911 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name); 2912 return false; 2913 } 2914 if (!fd.initial_value_tag().is_int()) { 2915 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name); 2916 return false; 2917 } 2918 jint field_value = fd.int_initial_value(); 2919 if (field_value == hardcoded_constant) { 2920 return true; 2921 } else { 2922 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); 2923 return false; 2924 } 2925 } 2926 2927 2928 // Check the hard-coded field offsets of all the classes in this file 2929 2930 void JavaClasses::check_offsets() { 2931 bool valid = true; 2932 2933 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 2934 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig) 2935 2936 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 2937 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig) 2938 2939 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 2940 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig) 2941 2942 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \ 2943 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig) 2944 2945 // java.lang.String 2946 2947 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C"); 2948 CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I"); 2949 CHECK_OFFSET("java/lang/String", java_lang_String, count, "I"); 2950 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I"); 2951 2952 // java.lang.Class 2953 2954 // Fake fields 2955 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked 2956 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked 2957 // CHECK_OFFSET("java/lang/Class", java_lang_Class, resolved_constructor); // %%% this needs to be checked 2958 2959 // java.lang.Throwable 2960 2961 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;"); 2962 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;"); 2963 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;"); 2964 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;"); 2965 2966 // Boxed primitive objects (java_lang_boxing_object) 2967 2968 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 2969 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 2970 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 2971 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 2972 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 2973 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 2974 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 2975 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 2976 2977 // java.lang.ClassLoader 2978 2979 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;"); 2980 2981 // java.lang.System 2982 2983 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;"); 2984 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;"); 2985 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;"); 2986 2987 // java.lang.StackTraceElement 2988 2989 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;"); 2990 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;"); 2991 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;"); 2992 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I"); 2993 2994 // java.lang.ref.Reference 2995 2996 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;"); 2997 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;"); 2998 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;"); 2999 // Fake field 3000 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;"); 3001 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;"); 3002 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;"); 3003 3004 // java.lang.ref.SoftReference 3005 3006 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J"); 3007 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J"); 3008 3009 // java.lang.AssertionStatusDirectives 3010 // 3011 // The CheckAssertionStatusDirectives boolean can be removed from here and 3012 // globals.hpp after the AssertionStatusDirectives class has been integrated 3013 // into merlin "for some time." Without it, the vm will fail with early 3014 // merlin builds. 3015 3016 if (CheckAssertionStatusDirectives && JDK_Version::is_gte_jdk14x_version()) { 3017 const char* nm = "java/lang/AssertionStatusDirectives"; 3018 const char* sig = "[Ljava/lang/String;"; 3019 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig); 3020 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z"); 3021 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig); 3022 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z"); 3023 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z"); 3024 } 3025 3026 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed"); 3027 } 3028 3029 #endif // PRODUCT 3030 3031 void javaClasses_init() { 3032 JavaClasses::compute_offsets(); 3033 JavaClasses::check_offsets(); 3034 FilteredFieldsMap::initialize(); // must be done after computing offsets. 3035 }