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 DebugInfoReadStream stream(nm, decode_offset); 1233 decode_offset = stream.read_int(); 1234 method = (methodOop)nm->oop_at(stream.read_int()); 1235 bci = stream.read_bci(); 1236 } else { 1237 if (fr.is_first_frame()) break; 1238 address pc = fr.pc(); 1239 if (fr.is_interpreted_frame()) { 1240 intptr_t bcx = fr.interpreter_frame_bcx(); 1241 method = fr.interpreter_frame_method(); 1242 bci = fr.is_bci(bcx) ? bcx : method->bci_from((address)bcx); 1243 fr = fr.sender(&map); 1244 } else { 1245 CodeBlob* cb = fr.cb(); 1246 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL 1247 // but non nmethod 1248 fr = fr.sender(&map); 1249 if (cb == NULL || !cb->is_nmethod()) { 1250 continue; 1251 } 1252 nm = (nmethod*)cb; 1253 if (nm->method()->is_native()) { 1254 method = nm->method(); 1255 bci = 0; 1256 } else { 1257 PcDesc* pd = nm->pc_desc_at(pc); 1258 decode_offset = pd->scope_decode_offset(); 1259 // if decode_offset is not equal to 0, it will execute the 1260 // "compiled java method case" at the beginning of the loop. 1261 continue; 1262 } 1263 } 1264 } 1265 #ifdef ASSERT 1266 assert(st_method() == method && st.bci() == bci, 1267 "Wrong stack trace"); 1268 st.next(); 1269 // vframeStream::method isn't GC-safe so store off a copy 1270 // of the methodOop in case we GC. 1271 if (!st.at_end()) { 1272 st_method = st.method(); 1273 } 1274 #endif 1275 if (!skip_fillInStackTrace_check) { 1276 // check "fillInStackTrace" only once, so we negate the flag 1277 // after the first time check. 1278 skip_fillInStackTrace_check = true; 1279 if (method->name() == vmSymbols::fillInStackTrace_name()) { 1280 continue; 1281 } 1282 } 1283 // skip <init> methods of the exceptions klass. If there is <init> methods 1284 // that belongs to a superclass of the exception we are going to skipping 1285 // them in stack trace. This is simlar to classic VM. 1286 if (!skip_throwableInit_check) { 1287 if (method->name() == vmSymbols::object_initializer_name() && 1288 throwable->is_a(method->method_holder())) { 1289 continue; 1290 } else { 1291 // if no "Throwable.init()" method found, we stop checking it next time. 1292 skip_throwableInit_check = true; 1293 } 1294 } 1295 bt.push(method, bci, CHECK); 1296 total_count++; 1297 } 1298 1299 // Put completed stack trace into throwable object 1300 set_backtrace(throwable(), bt.backtrace()); 1301 } 1302 1303 void java_lang_Throwable::fill_in_stack_trace(Handle throwable) { 1304 // No-op if stack trace is disabled 1305 if (!StackTraceInThrowable) { 1306 return; 1307 } 1308 1309 // Disable stack traces for some preallocated out of memory errors 1310 if (!Universe::should_fill_in_stack_trace(throwable)) { 1311 return; 1312 } 1313 1314 PRESERVE_EXCEPTION_MARK; 1315 1316 JavaThread* thread = JavaThread::active(); 1317 fill_in_stack_trace(throwable, thread); 1318 // ignore exceptions thrown during stack trace filling 1319 CLEAR_PENDING_EXCEPTION; 1320 } 1321 1322 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 1323 // Allocate stack trace - backtrace is created but not filled in 1324 1325 // No-op if stack trace is disabled 1326 if (!StackTraceInThrowable) return; 1327 1328 objArrayOop h_oop = oopFactory::new_objectArray(trace_size, CHECK); 1329 objArrayHandle backtrace (THREAD, h_oop); 1330 objArrayOop m_oop = oopFactory::new_objectArray(trace_chunk_size, CHECK); 1331 objArrayHandle methods (THREAD, m_oop); 1332 typeArrayOop b = oopFactory::new_shortArray(trace_chunk_size, CHECK); 1333 typeArrayHandle bcis(THREAD, b); 1334 1335 // backtrace has space for one chunk (next is NULL) 1336 backtrace->obj_at_put(trace_methods_offset, methods()); 1337 backtrace->obj_at_put(trace_bcis_offset, bcis()); 1338 set_backtrace(throwable(), backtrace()); 1339 } 1340 1341 1342 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 1343 // Fill in stack trace into preallocated backtrace (no GC) 1344 1345 // No-op if stack trace is disabled 1346 if (!StackTraceInThrowable) return; 1347 1348 assert(throwable->is_a(SystemDictionary::throwable_klass()), "sanity check"); 1349 1350 oop backtrace = java_lang_Throwable::backtrace(throwable()); 1351 assert(backtrace != NULL, "backtrace not preallocated"); 1352 1353 oop m = objArrayOop(backtrace)->obj_at(trace_methods_offset); 1354 objArrayOop methods = objArrayOop(m); 1355 assert(methods != NULL && methods->length() > 0, "method array not preallocated"); 1356 1357 oop b = objArrayOop(backtrace)->obj_at(trace_bcis_offset); 1358 typeArrayOop bcis = typeArrayOop(b); 1359 assert(bcis != NULL, "bci array not preallocated"); 1360 1361 assert(methods->length() == bcis->length(), "method and bci arrays should match"); 1362 1363 JavaThread* thread = JavaThread::current(); 1364 ResourceMark rm(thread); 1365 vframeStream st(thread); 1366 1367 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 1368 // methods as preallocated errors aren't created by "java" code. 1369 1370 // fill in as much stack trace as possible 1371 int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth); 1372 int chunk_count = 0; 1373 1374 for (;!st.at_end(); st.next()) { 1375 // add element 1376 bcis->ushort_at_put(chunk_count, st.bci()); 1377 methods->obj_at_put(chunk_count, st.method()); 1378 1379 chunk_count++; 1380 1381 // Bail-out for deep stacks 1382 if (chunk_count >= max_chunks) break; 1383 } 1384 } 1385 1386 1387 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) { 1388 if (throwable == NULL) { 1389 THROW_0(vmSymbols::java_lang_NullPointerException()); 1390 } 1391 objArrayOop chunk = objArrayOop(backtrace(throwable)); 1392 int depth = 0; 1393 if (chunk != NULL) { 1394 // Iterate over chunks and count full ones 1395 while (true) { 1396 objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset)); 1397 if (next == NULL) break; 1398 depth += trace_chunk_size; 1399 chunk = next; 1400 } 1401 assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check"); 1402 // Count element in remaining partial chunk 1403 objArrayOop methods = objArrayOop(chunk->obj_at(trace_methods_offset)); 1404 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 1405 assert(methods != NULL && bcis != NULL, "sanity check"); 1406 for (int i = 0; i < methods->length(); i++) { 1407 if (methods->obj_at(i) == NULL) break; 1408 depth++; 1409 } 1410 } 1411 return depth; 1412 } 1413 1414 1415 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) { 1416 if (throwable == NULL) { 1417 THROW_0(vmSymbols::java_lang_NullPointerException()); 1418 } 1419 if (index < 0) { 1420 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 1421 } 1422 // Compute how many chunks to skip and index into actual chunk 1423 objArrayOop chunk = objArrayOop(backtrace(throwable)); 1424 int skip_chunks = index / trace_chunk_size; 1425 int chunk_index = index % trace_chunk_size; 1426 while (chunk != NULL && skip_chunks > 0) { 1427 chunk = objArrayOop(chunk->obj_at(trace_next_offset)); 1428 skip_chunks--; 1429 } 1430 if (chunk == NULL) { 1431 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 1432 } 1433 // Get method,bci from chunk 1434 objArrayOop methods = objArrayOop(chunk->obj_at(trace_methods_offset)); 1435 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 1436 assert(methods != NULL && bcis != NULL, "sanity check"); 1437 methodHandle method(THREAD, methodOop(methods->obj_at(chunk_index))); 1438 int bci = bcis->ushort_at(chunk_index); 1439 // Chunk can be partial full 1440 if (method.is_null()) { 1441 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 1442 } 1443 1444 oop element = java_lang_StackTraceElement::create(method, bci, CHECK_0); 1445 return element; 1446 } 1447 1448 oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) { 1449 // SystemDictionary::stackTraceElement_klass() will be null for pre-1.4 JDKs 1450 assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4"); 1451 1452 // Allocate java.lang.StackTraceElement instance 1453 klassOop k = SystemDictionary::stackTraceElement_klass(); 1454 assert(k != NULL, "must be loaded in 1.4+"); 1455 instanceKlassHandle ik (THREAD, k); 1456 if (ik->should_be_initialized()) { 1457 ik->initialize(CHECK_0); 1458 } 1459 1460 Handle element = ik->allocate_instance_handle(CHECK_0); 1461 // Fill in class name 1462 ResourceMark rm(THREAD); 1463 const char* str = instanceKlass::cast(method->method_holder())->external_name(); 1464 oop classname = StringTable::intern((char*) str, CHECK_0); 1465 java_lang_StackTraceElement::set_declaringClass(element(), classname); 1466 // Fill in method name 1467 oop methodname = StringTable::intern(method->name(), CHECK_0); 1468 java_lang_StackTraceElement::set_methodName(element(), methodname); 1469 // Fill in source file name 1470 symbolOop source = instanceKlass::cast(method->method_holder())->source_file_name(); 1471 oop filename = StringTable::intern(source, CHECK_0); 1472 java_lang_StackTraceElement::set_fileName(element(), filename); 1473 // File in source line number 1474 int line_number; 1475 if (method->is_native()) { 1476 // Negative value different from -1 below, enabling Java code in 1477 // class java.lang.StackTraceElement to distinguish "native" from 1478 // "no LineNumberTable". 1479 line_number = -2; 1480 } else { 1481 // Returns -1 if no LineNumberTable, and otherwise actual line number 1482 line_number = method->line_number_from_bci(bci); 1483 } 1484 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 1485 1486 return element(); 1487 } 1488 1489 1490 void java_lang_reflect_AccessibleObject::compute_offsets() { 1491 klassOop k = SystemDictionary::reflect_accessible_object_klass(); 1492 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature()); 1493 } 1494 1495 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 1496 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1497 return (jboolean) reflect->bool_field(override_offset); 1498 } 1499 1500 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 1501 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1502 reflect->bool_field_put(override_offset, (int) value); 1503 } 1504 1505 void java_lang_reflect_Method::compute_offsets() { 1506 klassOop k = SystemDictionary::reflect_method_klass(); 1507 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 1508 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1509 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature()); 1510 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 1511 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 1512 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 1513 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 1514 // The generic signature and annotations fields are only present in 1.5 1515 signature_offset = -1; 1516 annotations_offset = -1; 1517 parameter_annotations_offset = -1; 1518 annotation_default_offset = -1; 1519 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 1520 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 1521 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 1522 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature()); 1523 } 1524 1525 Handle java_lang_reflect_Method::create(TRAPS) { 1526 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1527 klassOop klass = SystemDictionary::reflect_method_klass(); 1528 // This class is eagerly initialized during VM initialization, since we keep a refence 1529 // to one of the methods 1530 assert(instanceKlass::cast(klass)->is_initialized(), "must be initialized"); 1531 return instanceKlass::cast(klass)->allocate_instance_handle(CHECK_NH); 1532 } 1533 1534 oop java_lang_reflect_Method::clazz(oop reflect) { 1535 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1536 return reflect->obj_field(clazz_offset); 1537 } 1538 1539 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 1540 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1541 reflect->obj_field_put(clazz_offset, value); 1542 } 1543 1544 int java_lang_reflect_Method::slot(oop reflect) { 1545 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1546 return reflect->int_field(slot_offset); 1547 } 1548 1549 void java_lang_reflect_Method::set_slot(oop reflect, int value) { 1550 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1551 reflect->int_field_put(slot_offset, value); 1552 } 1553 1554 oop java_lang_reflect_Method::name(oop method) { 1555 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1556 return method->obj_field(name_offset); 1557 } 1558 1559 void java_lang_reflect_Method::set_name(oop method, oop value) { 1560 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1561 method->obj_field_put(name_offset, value); 1562 } 1563 1564 oop java_lang_reflect_Method::return_type(oop method) { 1565 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1566 return method->obj_field(returnType_offset); 1567 } 1568 1569 void java_lang_reflect_Method::set_return_type(oop method, oop value) { 1570 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1571 method->obj_field_put(returnType_offset, value); 1572 } 1573 1574 oop java_lang_reflect_Method::parameter_types(oop method) { 1575 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1576 return method->obj_field(parameterTypes_offset); 1577 } 1578 1579 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 1580 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1581 method->obj_field_put(parameterTypes_offset, value); 1582 } 1583 1584 oop java_lang_reflect_Method::exception_types(oop method) { 1585 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1586 return method->obj_field(exceptionTypes_offset); 1587 } 1588 1589 void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 1590 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1591 method->obj_field_put(exceptionTypes_offset, value); 1592 } 1593 1594 int java_lang_reflect_Method::modifiers(oop method) { 1595 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1596 return method->int_field(modifiers_offset); 1597 } 1598 1599 void java_lang_reflect_Method::set_modifiers(oop method, int value) { 1600 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1601 method->int_field_put(modifiers_offset, value); 1602 } 1603 1604 bool java_lang_reflect_Method::has_signature_field() { 1605 return (signature_offset >= 0); 1606 } 1607 1608 oop java_lang_reflect_Method::signature(oop method) { 1609 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1610 assert(has_signature_field(), "signature field must be present"); 1611 return method->obj_field(signature_offset); 1612 } 1613 1614 void java_lang_reflect_Method::set_signature(oop method, oop value) { 1615 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1616 assert(has_signature_field(), "signature field must be present"); 1617 method->obj_field_put(signature_offset, value); 1618 } 1619 1620 bool java_lang_reflect_Method::has_annotations_field() { 1621 return (annotations_offset >= 0); 1622 } 1623 1624 oop java_lang_reflect_Method::annotations(oop method) { 1625 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1626 assert(has_annotations_field(), "annotations field must be present"); 1627 return method->obj_field(annotations_offset); 1628 } 1629 1630 void java_lang_reflect_Method::set_annotations(oop method, oop value) { 1631 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1632 assert(has_annotations_field(), "annotations field must be present"); 1633 method->obj_field_put(annotations_offset, value); 1634 } 1635 1636 bool java_lang_reflect_Method::has_parameter_annotations_field() { 1637 return (parameter_annotations_offset >= 0); 1638 } 1639 1640 oop java_lang_reflect_Method::parameter_annotations(oop method) { 1641 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1642 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 1643 return method->obj_field(parameter_annotations_offset); 1644 } 1645 1646 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 1647 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1648 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 1649 method->obj_field_put(parameter_annotations_offset, value); 1650 } 1651 1652 bool java_lang_reflect_Method::has_annotation_default_field() { 1653 return (annotation_default_offset >= 0); 1654 } 1655 1656 oop java_lang_reflect_Method::annotation_default(oop method) { 1657 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1658 assert(has_annotation_default_field(), "annotation default field must be present"); 1659 return method->obj_field(annotation_default_offset); 1660 } 1661 1662 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 1663 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1664 assert(has_annotation_default_field(), "annotation default field must be present"); 1665 method->obj_field_put(annotation_default_offset, value); 1666 } 1667 1668 void java_lang_reflect_Constructor::compute_offsets() { 1669 klassOop k = SystemDictionary::reflect_constructor_klass(); 1670 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 1671 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 1672 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 1673 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 1674 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 1675 // The generic signature and annotations fields are only present in 1.5 1676 signature_offset = -1; 1677 annotations_offset = -1; 1678 parameter_annotations_offset = -1; 1679 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 1680 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 1681 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 1682 } 1683 1684 Handle java_lang_reflect_Constructor::create(TRAPS) { 1685 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1686 symbolHandle name = vmSymbolHandles::java_lang_reflect_Constructor(); 1687 klassOop k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 1688 instanceKlassHandle klass (THREAD, k); 1689 // Ensure it is initialized 1690 klass->initialize(CHECK_NH); 1691 return klass->allocate_instance_handle(CHECK_NH); 1692 } 1693 1694 oop java_lang_reflect_Constructor::clazz(oop reflect) { 1695 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1696 return reflect->obj_field(clazz_offset); 1697 } 1698 1699 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 1700 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1701 reflect->obj_field_put(clazz_offset, value); 1702 } 1703 1704 oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 1705 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1706 return constructor->obj_field(parameterTypes_offset); 1707 } 1708 1709 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 1710 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1711 constructor->obj_field_put(parameterTypes_offset, value); 1712 } 1713 1714 oop java_lang_reflect_Constructor::exception_types(oop constructor) { 1715 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1716 return constructor->obj_field(exceptionTypes_offset); 1717 } 1718 1719 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 1720 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1721 constructor->obj_field_put(exceptionTypes_offset, value); 1722 } 1723 1724 int java_lang_reflect_Constructor::slot(oop reflect) { 1725 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1726 return reflect->int_field(slot_offset); 1727 } 1728 1729 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 1730 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1731 reflect->int_field_put(slot_offset, value); 1732 } 1733 1734 int java_lang_reflect_Constructor::modifiers(oop constructor) { 1735 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1736 return constructor->int_field(modifiers_offset); 1737 } 1738 1739 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 1740 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1741 constructor->int_field_put(modifiers_offset, value); 1742 } 1743 1744 bool java_lang_reflect_Constructor::has_signature_field() { 1745 return (signature_offset >= 0); 1746 } 1747 1748 oop java_lang_reflect_Constructor::signature(oop constructor) { 1749 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1750 assert(has_signature_field(), "signature field must be present"); 1751 return constructor->obj_field(signature_offset); 1752 } 1753 1754 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 1755 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1756 assert(has_signature_field(), "signature field must be present"); 1757 constructor->obj_field_put(signature_offset, value); 1758 } 1759 1760 bool java_lang_reflect_Constructor::has_annotations_field() { 1761 return (annotations_offset >= 0); 1762 } 1763 1764 oop java_lang_reflect_Constructor::annotations(oop constructor) { 1765 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1766 assert(has_annotations_field(), "annotations field must be present"); 1767 return constructor->obj_field(annotations_offset); 1768 } 1769 1770 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 1771 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1772 assert(has_annotations_field(), "annotations field must be present"); 1773 constructor->obj_field_put(annotations_offset, value); 1774 } 1775 1776 bool java_lang_reflect_Constructor::has_parameter_annotations_field() { 1777 return (parameter_annotations_offset >= 0); 1778 } 1779 1780 oop java_lang_reflect_Constructor::parameter_annotations(oop method) { 1781 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1782 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 1783 return method->obj_field(parameter_annotations_offset); 1784 } 1785 1786 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 1787 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1788 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 1789 method->obj_field_put(parameter_annotations_offset, value); 1790 } 1791 1792 void java_lang_reflect_Field::compute_offsets() { 1793 klassOop k = SystemDictionary::reflect_field_klass(); 1794 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 1795 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1796 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature()); 1797 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 1798 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 1799 // The generic signature and annotations fields are only present in 1.5 1800 signature_offset = -1; 1801 annotations_offset = -1; 1802 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 1803 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 1804 } 1805 1806 Handle java_lang_reflect_Field::create(TRAPS) { 1807 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1808 symbolHandle name = vmSymbolHandles::java_lang_reflect_Field(); 1809 klassOop k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 1810 instanceKlassHandle klass (THREAD, k); 1811 // Ensure it is initialized 1812 klass->initialize(CHECK_NH); 1813 return klass->allocate_instance_handle(CHECK_NH); 1814 } 1815 1816 oop java_lang_reflect_Field::clazz(oop reflect) { 1817 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1818 return reflect->obj_field(clazz_offset); 1819 } 1820 1821 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 1822 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1823 reflect->obj_field_put(clazz_offset, value); 1824 } 1825 1826 oop java_lang_reflect_Field::name(oop field) { 1827 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1828 return field->obj_field(name_offset); 1829 } 1830 1831 void java_lang_reflect_Field::set_name(oop field, oop value) { 1832 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1833 field->obj_field_put(name_offset, value); 1834 } 1835 1836 oop java_lang_reflect_Field::type(oop field) { 1837 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1838 return field->obj_field(type_offset); 1839 } 1840 1841 void java_lang_reflect_Field::set_type(oop field, oop value) { 1842 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1843 field->obj_field_put(type_offset, value); 1844 } 1845 1846 int java_lang_reflect_Field::slot(oop reflect) { 1847 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1848 return reflect->int_field(slot_offset); 1849 } 1850 1851 void java_lang_reflect_Field::set_slot(oop reflect, int value) { 1852 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1853 reflect->int_field_put(slot_offset, value); 1854 } 1855 1856 int java_lang_reflect_Field::modifiers(oop field) { 1857 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1858 return field->int_field(modifiers_offset); 1859 } 1860 1861 void java_lang_reflect_Field::set_modifiers(oop field, int value) { 1862 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1863 field->int_field_put(modifiers_offset, value); 1864 } 1865 1866 bool java_lang_reflect_Field::has_signature_field() { 1867 return (signature_offset >= 0); 1868 } 1869 1870 oop java_lang_reflect_Field::signature(oop field) { 1871 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1872 assert(has_signature_field(), "signature field must be present"); 1873 return field->obj_field(signature_offset); 1874 } 1875 1876 void java_lang_reflect_Field::set_signature(oop field, oop value) { 1877 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1878 assert(has_signature_field(), "signature field must be present"); 1879 field->obj_field_put(signature_offset, value); 1880 } 1881 1882 bool java_lang_reflect_Field::has_annotations_field() { 1883 return (annotations_offset >= 0); 1884 } 1885 1886 oop java_lang_reflect_Field::annotations(oop field) { 1887 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1888 assert(has_annotations_field(), "annotations field must be present"); 1889 return field->obj_field(annotations_offset); 1890 } 1891 1892 void java_lang_reflect_Field::set_annotations(oop field, oop value) { 1893 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1894 assert(has_annotations_field(), "annotations field must be present"); 1895 field->obj_field_put(annotations_offset, value); 1896 } 1897 1898 1899 void sun_reflect_ConstantPool::compute_offsets() { 1900 klassOop k = SystemDictionary::reflect_constant_pool_klass(); 1901 // This null test can be removed post beta 1902 if (k != NULL) { 1903 compute_offset(_cp_oop_offset, k, vmSymbols::constantPoolOop_name(), vmSymbols::object_signature()); 1904 } 1905 } 1906 1907 1908 Handle sun_reflect_ConstantPool::create(TRAPS) { 1909 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1910 klassOop k = SystemDictionary::reflect_constant_pool_klass(); 1911 instanceKlassHandle klass (THREAD, k); 1912 // Ensure it is initialized 1913 klass->initialize(CHECK_NH); 1914 return klass->allocate_instance_handle(CHECK_NH); 1915 } 1916 1917 1918 oop sun_reflect_ConstantPool::cp_oop(oop reflect) { 1919 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1920 return reflect->obj_field(_cp_oop_offset); 1921 } 1922 1923 1924 void sun_reflect_ConstantPool::set_cp_oop(oop reflect, oop value) { 1925 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1926 reflect->obj_field_put(_cp_oop_offset, value); 1927 } 1928 1929 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() { 1930 klassOop k = SystemDictionary::reflect_unsafe_static_field_accessor_impl_klass(); 1931 // This null test can be removed post beta 1932 if (k != NULL) { 1933 compute_offset(_base_offset, k, 1934 vmSymbols::base_name(), vmSymbols::object_signature()); 1935 } 1936 } 1937 1938 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 1939 klassOop k = SystemDictionary::box_klass(type); 1940 if (k == NULL) return NULL; 1941 instanceKlassHandle h (THREAD, k); 1942 if (!h->is_initialized()) h->initialize(CHECK_0); 1943 return h->allocate_instance(THREAD); 1944 } 1945 1946 1947 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 1948 oop box = initialize_and_allocate(type, CHECK_0); 1949 if (box == NULL) return NULL; 1950 switch (type) { 1951 case T_BOOLEAN: 1952 box->bool_field_put(value_offset, value->z); 1953 break; 1954 case T_CHAR: 1955 box->char_field_put(value_offset, value->c); 1956 break; 1957 case T_FLOAT: 1958 box->float_field_put(value_offset, value->f); 1959 break; 1960 case T_DOUBLE: 1961 box->double_field_put(long_value_offset, value->d); 1962 break; 1963 case T_BYTE: 1964 box->byte_field_put(value_offset, value->b); 1965 break; 1966 case T_SHORT: 1967 box->short_field_put(value_offset, value->s); 1968 break; 1969 case T_INT: 1970 box->int_field_put(value_offset, value->i); 1971 break; 1972 case T_LONG: 1973 box->long_field_put(long_value_offset, value->j); 1974 break; 1975 default: 1976 return NULL; 1977 } 1978 return box; 1979 } 1980 1981 1982 BasicType java_lang_boxing_object::basic_type(oop box) { 1983 if (box == NULL) return T_ILLEGAL; 1984 BasicType type = SystemDictionary::box_klass_type(box->klass()); 1985 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 1986 return T_ILLEGAL; 1987 return type; 1988 } 1989 1990 1991 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 1992 BasicType type = SystemDictionary::box_klass_type(box->klass()); 1993 switch (type) { 1994 case T_BOOLEAN: 1995 value->z = box->bool_field(value_offset); 1996 break; 1997 case T_CHAR: 1998 value->c = box->char_field(value_offset); 1999 break; 2000 case T_FLOAT: 2001 value->f = box->float_field(value_offset); 2002 break; 2003 case T_DOUBLE: 2004 value->d = box->double_field(long_value_offset); 2005 break; 2006 case T_BYTE: 2007 value->b = box->byte_field(value_offset); 2008 break; 2009 case T_SHORT: 2010 value->s = box->short_field(value_offset); 2011 break; 2012 case T_INT: 2013 value->i = box->int_field(value_offset); 2014 break; 2015 case T_LONG: 2016 value->j = box->long_field(long_value_offset); 2017 break; 2018 default: 2019 return T_ILLEGAL; 2020 } // end switch 2021 return type; 2022 } 2023 2024 2025 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 2026 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2027 switch (type) { 2028 case T_BOOLEAN: 2029 box->bool_field_put(value_offset, value->z); 2030 break; 2031 case T_CHAR: 2032 box->char_field_put(value_offset, value->c); 2033 break; 2034 case T_FLOAT: 2035 box->float_field_put(value_offset, value->f); 2036 break; 2037 case T_DOUBLE: 2038 box->double_field_put(long_value_offset, value->d); 2039 break; 2040 case T_BYTE: 2041 box->byte_field_put(value_offset, value->b); 2042 break; 2043 case T_SHORT: 2044 box->short_field_put(value_offset, value->s); 2045 break; 2046 case T_INT: 2047 box->int_field_put(value_offset, value->i); 2048 break; 2049 case T_LONG: 2050 box->long_field_put(long_value_offset, value->j); 2051 break; 2052 default: 2053 return T_ILLEGAL; 2054 } // end switch 2055 return type; 2056 } 2057 2058 2059 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) { 2060 switch (type) { 2061 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break; 2062 case T_CHAR: st->print("%d", value->c); break; 2063 case T_BYTE: st->print("%d", value->b); break; 2064 case T_SHORT: st->print("%d", value->s); break; 2065 case T_INT: st->print("%d", value->i); break; 2066 case T_LONG: st->print(INT64_FORMAT, value->j); break; 2067 case T_FLOAT: st->print("%f", value->f); break; 2068 case T_DOUBLE: st->print("%lf", value->d); break; 2069 default: st->print("type %d?", type); break; 2070 } 2071 } 2072 2073 2074 // Support for java_lang_ref_Reference 2075 oop java_lang_ref_Reference::pending_list_lock() { 2076 instanceKlass* ik = instanceKlass::cast(SystemDictionary::reference_klass()); 2077 char *addr = (((char *)ik->start_of_static_fields()) + static_lock_offset); 2078 if (UseCompressedOops) { 2079 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 2080 } else { 2081 return oopDesc::load_decode_heap_oop((oop*)addr); 2082 } 2083 } 2084 2085 HeapWord *java_lang_ref_Reference::pending_list_addr() { 2086 instanceKlass* ik = instanceKlass::cast(SystemDictionary::reference_klass()); 2087 char *addr = (((char *)ik->start_of_static_fields()) + static_pending_offset); 2088 // XXX This might not be HeapWord aligned, almost rather be char *. 2089 return (HeapWord*)addr; 2090 } 2091 2092 oop java_lang_ref_Reference::pending_list() { 2093 char *addr = (char *)pending_list_addr(); 2094 if (UseCompressedOops) { 2095 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 2096 } else { 2097 return oopDesc::load_decode_heap_oop((oop*)addr); 2098 } 2099 } 2100 2101 2102 // Support for java_lang_ref_SoftReference 2103 2104 jlong java_lang_ref_SoftReference::timestamp(oop ref) { 2105 return ref->long_field(timestamp_offset); 2106 } 2107 2108 jlong java_lang_ref_SoftReference::clock() { 2109 instanceKlass* ik = instanceKlass::cast(SystemDictionary::soft_reference_klass()); 2110 int offset = ik->offset_of_static_fields() + static_clock_offset; 2111 2112 return SystemDictionary::soft_reference_klass()->long_field(offset); 2113 } 2114 2115 void java_lang_ref_SoftReference::set_clock(jlong value) { 2116 instanceKlass* ik = instanceKlass::cast(SystemDictionary::soft_reference_klass()); 2117 int offset = ik->offset_of_static_fields() + static_clock_offset; 2118 2119 SystemDictionary::soft_reference_klass()->long_field_put(offset, value); 2120 } 2121 2122 2123 // Support for java_dyn_MethodHandle 2124 2125 int java_dyn_MethodHandle::_type_offset; 2126 int java_dyn_MethodHandle::_vmtarget_offset; 2127 int java_dyn_MethodHandle::_vmentry_offset; 2128 int java_dyn_MethodHandle::_vmslots_offset; 2129 2130 int sun_dyn_MemberName::_clazz_offset; 2131 int sun_dyn_MemberName::_name_offset; 2132 int sun_dyn_MemberName::_type_offset; 2133 int sun_dyn_MemberName::_flags_offset; 2134 int sun_dyn_MemberName::_vmtarget_offset; 2135 int sun_dyn_MemberName::_vmindex_offset; 2136 2137 int sun_dyn_DirectMethodHandle::_vmindex_offset; 2138 2139 int sun_dyn_BoundMethodHandle::_argument_offset; 2140 int sun_dyn_BoundMethodHandle::_vmargslot_offset; 2141 2142 int sun_dyn_AdapterMethodHandle::_conversion_offset; 2143 2144 void java_dyn_MethodHandle::compute_offsets() { 2145 klassOop k = SystemDictionary::MethodHandle_klass(); 2146 if (k != NULL && EnableMethodHandles) { 2147 compute_offset(_type_offset, k, vmSymbols::type_name(), vmSymbols::java_dyn_MethodType_signature(), true); 2148 compute_offset(_vmtarget_offset, k, vmSymbols::vmtarget_name(), vmSymbols::object_signature(), true); 2149 compute_offset(_vmentry_offset, k, vmSymbols::vmentry_name(), vmSymbols::machine_word_signature(), true); 2150 2151 // Note: MH.vmslots (if it is present) is a hoisted copy of MH.type.form.vmslots. 2152 // It is optional pending experiments to keep or toss. 2153 compute_optional_offset(_vmslots_offset, k, vmSymbols::vmslots_name(), vmSymbols::int_signature(), true); 2154 } 2155 } 2156 2157 void sun_dyn_MemberName::compute_offsets() { 2158 klassOop k = SystemDictionary::MemberName_klass(); 2159 if (k != NULL && EnableMethodHandles) { 2160 compute_offset(_clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2161 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2162 compute_offset(_type_offset, k, vmSymbols::type_name(), vmSymbols::object_signature()); 2163 compute_offset(_flags_offset, k, vmSymbols::flags_name(), vmSymbols::int_signature()); 2164 compute_offset(_vmtarget_offset, k, vmSymbols::vmtarget_name(), vmSymbols::object_signature()); 2165 compute_offset(_vmindex_offset, k, vmSymbols::vmindex_name(), vmSymbols::int_signature()); 2166 } 2167 } 2168 2169 void sun_dyn_DirectMethodHandle::compute_offsets() { 2170 klassOop k = SystemDictionary::DirectMethodHandle_klass(); 2171 if (k != NULL && EnableMethodHandles) { 2172 compute_offset(_vmindex_offset, k, vmSymbols::vmindex_name(), vmSymbols::int_signature(), true); 2173 } 2174 } 2175 2176 void sun_dyn_BoundMethodHandle::compute_offsets() { 2177 klassOop k = SystemDictionary::BoundMethodHandle_klass(); 2178 if (k != NULL && EnableMethodHandles) { 2179 compute_offset(_vmargslot_offset, k, vmSymbols::vmargslot_name(), vmSymbols::int_signature(), true); 2180 compute_offset(_argument_offset, k, vmSymbols::argument_name(), vmSymbols::object_signature(), true); 2181 } 2182 } 2183 2184 void sun_dyn_AdapterMethodHandle::compute_offsets() { 2185 klassOop k = SystemDictionary::AdapterMethodHandle_klass(); 2186 if (k != NULL && EnableMethodHandles) { 2187 compute_offset(_conversion_offset, k, vmSymbols::conversion_name(), vmSymbols::int_signature(), true); 2188 } 2189 } 2190 2191 oop java_dyn_MethodHandle::type(oop mh) { 2192 return mh->obj_field(_type_offset); 2193 } 2194 2195 void java_dyn_MethodHandle::set_type(oop mh, oop mtype) { 2196 mh->obj_field_put(_type_offset, mtype); 2197 } 2198 2199 int java_dyn_MethodHandle::vmslots(oop mh) { 2200 int vmslots_offset = _vmslots_offset; 2201 if (vmslots_offset != 0) { 2202 #ifdef ASSERT 2203 int x = mh->int_field(vmslots_offset); 2204 int y = compute_vmslots(mh); 2205 assert(x == y, "correct hoisted value"); 2206 #endif 2207 return mh->int_field(vmslots_offset); 2208 } else { 2209 return compute_vmslots(mh); 2210 } 2211 } 2212 2213 // if MH.vmslots exists, hoist into it the value of type.form.vmslots 2214 void java_dyn_MethodHandle::init_vmslots(oop mh) { 2215 int vmslots_offset = _vmslots_offset; 2216 if (vmslots_offset != 0) { 2217 mh->int_field_put(vmslots_offset, compute_vmslots(mh)); 2218 } 2219 } 2220 2221 // fetch type.form.vmslots, which is the number of JVM stack slots 2222 // required to carry the arguments of this MH 2223 int java_dyn_MethodHandle::compute_vmslots(oop mh) { 2224 oop mtype = type(mh); 2225 if (mtype == NULL) return 0; // Java code would get NPE 2226 oop form = java_dyn_MethodType::form(mtype); 2227 if (form == NULL) return 0; // Java code would get NPE 2228 return java_dyn_MethodTypeForm::vmslots(form); 2229 } 2230 2231 // fetch the low-level entry point for this mh 2232 MethodHandleEntry* java_dyn_MethodHandle::vmentry(oop mh) { 2233 return (MethodHandleEntry*) mh->address_field(_vmentry_offset); 2234 } 2235 2236 void java_dyn_MethodHandle::set_vmentry(oop mh, MethodHandleEntry* me) { 2237 assert(_vmentry_offset != 0, "must be present"); 2238 2239 // This is always the final step that initializes a valid method handle: 2240 mh->release_address_field_put(_vmentry_offset, (address) me); 2241 2242 // There should be enough memory barriers on exit from native methods 2243 // to ensure that the MH is fully initialized to all threads before 2244 // Java code can publish it in global data structures. 2245 // But just in case, we use release_address_field_put. 2246 } 2247 2248 /// MemberName accessors 2249 2250 oop sun_dyn_MemberName::clazz(oop mname) { 2251 assert(is_instance(mname), "wrong type"); 2252 return mname->obj_field(_clazz_offset); 2253 } 2254 2255 void sun_dyn_MemberName::set_clazz(oop mname, oop clazz) { 2256 assert(is_instance(mname), "wrong type"); 2257 mname->obj_field_put(_clazz_offset, clazz); 2258 } 2259 2260 oop sun_dyn_MemberName::name(oop mname) { 2261 assert(is_instance(mname), "wrong type"); 2262 return mname->obj_field(_name_offset); 2263 } 2264 2265 void sun_dyn_MemberName::set_name(oop mname, oop name) { 2266 assert(is_instance(mname), "wrong type"); 2267 mname->obj_field_put(_name_offset, name); 2268 } 2269 2270 oop sun_dyn_MemberName::type(oop mname) { 2271 assert(is_instance(mname), "wrong type"); 2272 return mname->obj_field(_type_offset); 2273 } 2274 2275 void sun_dyn_MemberName::set_type(oop mname, oop type) { 2276 assert(is_instance(mname), "wrong type"); 2277 mname->obj_field_put(_type_offset, type); 2278 } 2279 2280 int sun_dyn_MemberName::flags(oop mname) { 2281 assert(is_instance(mname), "wrong type"); 2282 return mname->int_field(_flags_offset); 2283 } 2284 2285 void sun_dyn_MemberName::set_flags(oop mname, int flags) { 2286 assert(is_instance(mname), "wrong type"); 2287 mname->int_field_put(_flags_offset, flags); 2288 } 2289 2290 oop sun_dyn_MemberName::vmtarget(oop mname) { 2291 assert(is_instance(mname), "wrong type"); 2292 return mname->obj_field(_vmtarget_offset); 2293 } 2294 2295 void sun_dyn_MemberName::set_vmtarget(oop mname, oop ref) { 2296 assert(is_instance(mname), "wrong type"); 2297 mname->obj_field_put(_vmtarget_offset, ref); 2298 } 2299 2300 int sun_dyn_MemberName::vmindex(oop mname) { 2301 assert(is_instance(mname), "wrong type"); 2302 return mname->int_field(_vmindex_offset); 2303 } 2304 2305 void sun_dyn_MemberName::set_vmindex(oop mname, int index) { 2306 assert(is_instance(mname), "wrong type"); 2307 mname->int_field_put(_vmindex_offset, index); 2308 } 2309 2310 oop java_dyn_MethodHandle::vmtarget(oop mh) { 2311 assert(is_instance(mh), "MH only"); 2312 return mh->obj_field(_vmtarget_offset); 2313 } 2314 2315 void java_dyn_MethodHandle::set_vmtarget(oop mh, oop ref) { 2316 assert(is_instance(mh), "MH only"); 2317 mh->obj_field_put(_vmtarget_offset, ref); 2318 } 2319 2320 int sun_dyn_DirectMethodHandle::vmindex(oop mh) { 2321 assert(is_instance(mh), "DMH only"); 2322 return mh->int_field(_vmindex_offset); 2323 } 2324 2325 void sun_dyn_DirectMethodHandle::set_vmindex(oop mh, int index) { 2326 assert(is_instance(mh), "DMH only"); 2327 mh->int_field_put(_vmindex_offset, index); 2328 } 2329 2330 int sun_dyn_BoundMethodHandle::vmargslot(oop mh) { 2331 assert(is_instance(mh), "BMH only"); 2332 return mh->int_field(_vmargslot_offset); 2333 } 2334 2335 oop sun_dyn_BoundMethodHandle::argument(oop mh) { 2336 assert(is_instance(mh), "BMH only"); 2337 return mh->obj_field(_argument_offset); 2338 } 2339 2340 int sun_dyn_AdapterMethodHandle::conversion(oop mh) { 2341 assert(is_instance(mh), "AMH only"); 2342 return mh->int_field(_conversion_offset); 2343 } 2344 2345 void sun_dyn_AdapterMethodHandle::set_conversion(oop mh, int conv) { 2346 assert(is_instance(mh), "AMH only"); 2347 mh->int_field_put(_conversion_offset, conv); 2348 } 2349 2350 2351 // Support for java_dyn_MethodType 2352 2353 int java_dyn_MethodType::_rtype_offset; 2354 int java_dyn_MethodType::_ptypes_offset; 2355 int java_dyn_MethodType::_form_offset; 2356 2357 void java_dyn_MethodType::compute_offsets() { 2358 klassOop k = SystemDictionary::MethodType_klass(); 2359 if (k != NULL) { 2360 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature()); 2361 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature()); 2362 compute_offset(_form_offset, k, vmSymbols::form_name(), vmSymbols::java_dyn_MethodTypeForm_signature()); 2363 } 2364 } 2365 2366 void java_dyn_MethodType::print_signature(oop mt, outputStream* st) { 2367 st->print("("); 2368 objArrayOop pts = ptypes(mt); 2369 for (int i = 0, limit = pts->length(); i < limit; i++) { 2370 java_lang_Class::print_signature(pts->obj_at(i), st); 2371 } 2372 st->print(")"); 2373 java_lang_Class::print_signature(rtype(mt), st); 2374 } 2375 2376 symbolOop java_dyn_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) { 2377 ResourceMark rm; 2378 stringStream buffer(128); 2379 print_signature(mt, &buffer); 2380 const char* sigstr = buffer.base(); 2381 int siglen = (int) buffer.size(); 2382 if (!intern_if_not_found) 2383 return SymbolTable::probe(sigstr, siglen); 2384 else 2385 return oopFactory::new_symbol(sigstr, siglen, THREAD); 2386 } 2387 2388 oop java_dyn_MethodType::rtype(oop mt) { 2389 assert(is_instance(mt), "must be a MethodType"); 2390 return mt->obj_field(_rtype_offset); 2391 } 2392 2393 objArrayOop java_dyn_MethodType::ptypes(oop mt) { 2394 assert(is_instance(mt), "must be a MethodType"); 2395 return (objArrayOop) mt->obj_field(_ptypes_offset); 2396 } 2397 2398 oop java_dyn_MethodType::form(oop mt) { 2399 assert(is_instance(mt), "must be a MethodType"); 2400 return mt->obj_field(_form_offset); 2401 } 2402 2403 oop java_dyn_MethodType::ptype(oop mt, int idx) { 2404 return ptypes(mt)->obj_at(idx); 2405 } 2406 2407 2408 2409 // Support for java_dyn_MethodTypeForm 2410 2411 int java_dyn_MethodTypeForm::_vmslots_offset; 2412 int java_dyn_MethodTypeForm::_erasedType_offset; 2413 2414 void java_dyn_MethodTypeForm::compute_offsets() { 2415 klassOop k = SystemDictionary::MethodTypeForm_klass(); 2416 if (k != NULL) { 2417 compute_optional_offset(_vmslots_offset, k, vmSymbols::vmslots_name(), vmSymbols::int_signature(), true); 2418 compute_optional_offset(_erasedType_offset, k, vmSymbols::erasedType_name(), vmSymbols::java_dyn_MethodType_signature(), true); 2419 } 2420 } 2421 2422 int java_dyn_MethodTypeForm::vmslots(oop mtform) { 2423 assert(mtform->klass() == SystemDictionary::MethodTypeForm_klass(), "MTForm only"); 2424 return mtform->int_field(_vmslots_offset); 2425 } 2426 2427 oop java_dyn_MethodTypeForm::erasedType(oop mtform) { 2428 assert(mtform->klass() == SystemDictionary::MethodTypeForm_klass(), "MTForm only"); 2429 return mtform->obj_field(_erasedType_offset); 2430 } 2431 2432 2433 // Support for sun_dyn_CallSiteImpl 2434 2435 int sun_dyn_CallSiteImpl::_type_offset; 2436 int sun_dyn_CallSiteImpl::_target_offset; 2437 int sun_dyn_CallSiteImpl::_vmmethod_offset; 2438 2439 void sun_dyn_CallSiteImpl::compute_offsets() { 2440 if (!EnableInvokeDynamic) return; 2441 klassOop k = SystemDictionary::CallSiteImpl_klass(); 2442 if (k != NULL) { 2443 compute_offset(_type_offset, k, vmSymbols::type_name(), vmSymbols::java_dyn_MethodType_signature(), true); 2444 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_dyn_MethodHandle_signature(), true); 2445 compute_offset(_vmmethod_offset, k, vmSymbols::vmmethod_name(), vmSymbols::object_signature(), true); 2446 } 2447 } 2448 2449 oop sun_dyn_CallSiteImpl::type(oop site) { 2450 return site->obj_field(_type_offset); 2451 } 2452 2453 oop sun_dyn_CallSiteImpl::target(oop site) { 2454 return site->obj_field(_target_offset); 2455 } 2456 2457 void sun_dyn_CallSiteImpl::set_target(oop site, oop target) { 2458 site->obj_field_put(_target_offset, target); 2459 } 2460 2461 oop sun_dyn_CallSiteImpl::vmmethod(oop site) { 2462 return site->obj_field(_vmmethod_offset); 2463 } 2464 2465 void sun_dyn_CallSiteImpl::set_vmmethod(oop site, oop ref) { 2466 site->obj_field_put(_vmmethod_offset, ref); 2467 } 2468 2469 2470 // Support for java_security_AccessControlContext 2471 2472 int java_security_AccessControlContext::_context_offset = 0; 2473 int java_security_AccessControlContext::_privilegedContext_offset = 0; 2474 int java_security_AccessControlContext::_isPrivileged_offset = 0; 2475 2476 void java_security_AccessControlContext::compute_offsets() { 2477 assert(_isPrivileged_offset == 0, "offsets should be initialized only once"); 2478 fieldDescriptor fd; 2479 instanceKlass* ik = instanceKlass::cast(SystemDictionary::AccessControlContext_klass()); 2480 2481 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) { 2482 fatal("Invalid layout of java.security.AccessControlContext"); 2483 } 2484 _context_offset = fd.offset(); 2485 2486 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) { 2487 fatal("Invalid layout of java.security.AccessControlContext"); 2488 } 2489 _privilegedContext_offset = fd.offset(); 2490 2491 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) { 2492 fatal("Invalid layout of java.security.AccessControlContext"); 2493 } 2494 _isPrivileged_offset = fd.offset(); 2495 } 2496 2497 2498 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) { 2499 assert(_isPrivileged_offset != 0, "offsets should have been initialized"); 2500 // Ensure klass is initialized 2501 instanceKlass::cast(SystemDictionary::AccessControlContext_klass())->initialize(CHECK_0); 2502 // Allocate result 2503 oop result = instanceKlass::cast(SystemDictionary::AccessControlContext_klass())->allocate_instance(CHECK_0); 2504 // Fill in values 2505 result->obj_field_put(_context_offset, context()); 2506 result->obj_field_put(_privilegedContext_offset, privileged_context()); 2507 result->bool_field_put(_isPrivileged_offset, isPrivileged); 2508 return result; 2509 } 2510 2511 2512 // Support for java_lang_ClassLoader 2513 2514 oop java_lang_ClassLoader::parent(oop loader) { 2515 assert(loader->is_oop(), "loader must be oop"); 2516 return loader->obj_field(parent_offset); 2517 } 2518 2519 2520 bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 2521 // Fix for 4474172; see evaluation for more details 2522 loader = non_reflection_class_loader(loader); 2523 2524 oop cl = SystemDictionary::java_system_loader(); 2525 while(cl != NULL) { 2526 if (cl == loader) return true; 2527 cl = parent(cl); 2528 } 2529 return false; 2530 } 2531 2532 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) { 2533 if (loader != NULL) { 2534 // See whether this is one of the class loaders associated with 2535 // the generated bytecodes for reflection, and if so, "magically" 2536 // delegate to its parent to prevent class loading from occurring 2537 // in places where applications using reflection didn't expect it. 2538 klassOop delegating_cl_class = SystemDictionary::reflect_delegating_classloader_klass(); 2539 // This might be null in non-1.4 JDKs 2540 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) { 2541 return parent(loader); 2542 } 2543 } 2544 return loader; 2545 } 2546 2547 2548 // Support for java_lang_System 2549 2550 void java_lang_System::compute_offsets() { 2551 assert(offset_of_static_fields == 0, "offsets should be initialized only once"); 2552 2553 instanceKlass* ik = instanceKlass::cast(SystemDictionary::system_klass()); 2554 offset_of_static_fields = ik->offset_of_static_fields(); 2555 } 2556 2557 int java_lang_System::in_offset_in_bytes() { 2558 return (offset_of_static_fields + static_in_offset); 2559 } 2560 2561 2562 int java_lang_System::out_offset_in_bytes() { 2563 return (offset_of_static_fields + static_out_offset); 2564 } 2565 2566 2567 int java_lang_System::err_offset_in_bytes() { 2568 return (offset_of_static_fields + static_err_offset); 2569 } 2570 2571 2572 2573 int java_lang_String::value_offset; 2574 int java_lang_String::offset_offset; 2575 int java_lang_String::count_offset; 2576 int java_lang_String::hash_offset; 2577 int java_lang_Class::klass_offset; 2578 int java_lang_Class::array_klass_offset; 2579 int java_lang_Class::resolved_constructor_offset; 2580 int java_lang_Class::number_of_fake_oop_fields; 2581 int java_lang_Throwable::backtrace_offset; 2582 int java_lang_Throwable::detailMessage_offset; 2583 int java_lang_Throwable::cause_offset; 2584 int java_lang_Throwable::stackTrace_offset; 2585 int java_lang_reflect_AccessibleObject::override_offset; 2586 int java_lang_reflect_Method::clazz_offset; 2587 int java_lang_reflect_Method::name_offset; 2588 int java_lang_reflect_Method::returnType_offset; 2589 int java_lang_reflect_Method::parameterTypes_offset; 2590 int java_lang_reflect_Method::exceptionTypes_offset; 2591 int java_lang_reflect_Method::slot_offset; 2592 int java_lang_reflect_Method::modifiers_offset; 2593 int java_lang_reflect_Method::signature_offset; 2594 int java_lang_reflect_Method::annotations_offset; 2595 int java_lang_reflect_Method::parameter_annotations_offset; 2596 int java_lang_reflect_Method::annotation_default_offset; 2597 int java_lang_reflect_Constructor::clazz_offset; 2598 int java_lang_reflect_Constructor::parameterTypes_offset; 2599 int java_lang_reflect_Constructor::exceptionTypes_offset; 2600 int java_lang_reflect_Constructor::slot_offset; 2601 int java_lang_reflect_Constructor::modifiers_offset; 2602 int java_lang_reflect_Constructor::signature_offset; 2603 int java_lang_reflect_Constructor::annotations_offset; 2604 int java_lang_reflect_Constructor::parameter_annotations_offset; 2605 int java_lang_reflect_Field::clazz_offset; 2606 int java_lang_reflect_Field::name_offset; 2607 int java_lang_reflect_Field::type_offset; 2608 int java_lang_reflect_Field::slot_offset; 2609 int java_lang_reflect_Field::modifiers_offset; 2610 int java_lang_reflect_Field::signature_offset; 2611 int java_lang_reflect_Field::annotations_offset; 2612 int java_lang_boxing_object::value_offset; 2613 int java_lang_boxing_object::long_value_offset; 2614 int java_lang_ref_Reference::referent_offset; 2615 int java_lang_ref_Reference::queue_offset; 2616 int java_lang_ref_Reference::next_offset; 2617 int java_lang_ref_Reference::discovered_offset; 2618 int java_lang_ref_Reference::static_lock_offset; 2619 int java_lang_ref_Reference::static_pending_offset; 2620 int java_lang_ref_Reference::number_of_fake_oop_fields; 2621 int java_lang_ref_SoftReference::timestamp_offset; 2622 int java_lang_ref_SoftReference::static_clock_offset; 2623 int java_lang_ClassLoader::parent_offset; 2624 int java_lang_System::offset_of_static_fields; 2625 int java_lang_System::static_in_offset; 2626 int java_lang_System::static_out_offset; 2627 int java_lang_System::static_err_offset; 2628 int java_lang_StackTraceElement::declaringClass_offset; 2629 int java_lang_StackTraceElement::methodName_offset; 2630 int java_lang_StackTraceElement::fileName_offset; 2631 int java_lang_StackTraceElement::lineNumber_offset; 2632 int java_lang_AssertionStatusDirectives::classes_offset; 2633 int java_lang_AssertionStatusDirectives::classEnabled_offset; 2634 int java_lang_AssertionStatusDirectives::packages_offset; 2635 int java_lang_AssertionStatusDirectives::packageEnabled_offset; 2636 int java_lang_AssertionStatusDirectives::deflt_offset; 2637 int java_nio_Buffer::_limit_offset; 2638 int sun_misc_AtomicLongCSImpl::_value_offset; 2639 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0; 2640 int sun_reflect_ConstantPool::_cp_oop_offset; 2641 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset; 2642 2643 2644 // Support for java_lang_StackTraceElement 2645 2646 void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 2647 element->obj_field_put(fileName_offset, value); 2648 } 2649 2650 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 2651 element->obj_field_put(declaringClass_offset, value); 2652 } 2653 2654 void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 2655 element->obj_field_put(methodName_offset, value); 2656 } 2657 2658 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 2659 element->int_field_put(lineNumber_offset, value); 2660 } 2661 2662 2663 // Support for java Assertions - java_lang_AssertionStatusDirectives. 2664 2665 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 2666 o->obj_field_put(classes_offset, val); 2667 } 2668 2669 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 2670 o->obj_field_put(classEnabled_offset, val); 2671 } 2672 2673 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 2674 o->obj_field_put(packages_offset, val); 2675 } 2676 2677 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 2678 o->obj_field_put(packageEnabled_offset, val); 2679 } 2680 2681 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 2682 o->bool_field_put(deflt_offset, val); 2683 } 2684 2685 2686 // Support for intrinsification of java.nio.Buffer.checkIndex 2687 int java_nio_Buffer::limit_offset() { 2688 return _limit_offset; 2689 } 2690 2691 2692 void java_nio_Buffer::compute_offsets() { 2693 klassOop k = SystemDictionary::java_nio_Buffer_klass(); 2694 assert(k != NULL, "must be loaded in 1.4+"); 2695 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature()); 2696 } 2697 2698 // Support for intrinsification of sun.misc.AtomicLongCSImpl.attemptUpdate 2699 int sun_misc_AtomicLongCSImpl::value_offset() { 2700 assert(SystemDictionary::sun_misc_AtomicLongCSImpl_klass() != NULL, "can't call this"); 2701 return _value_offset; 2702 } 2703 2704 2705 void sun_misc_AtomicLongCSImpl::compute_offsets() { 2706 klassOop k = SystemDictionary::sun_misc_AtomicLongCSImpl_klass(); 2707 // If this class is not present, its value field offset won't be referenced. 2708 if (k != NULL) { 2709 compute_offset(_value_offset, k, vmSymbols::value_name(), vmSymbols::long_signature()); 2710 } 2711 } 2712 2713 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) { 2714 if (_owner_offset != 0) return; 2715 2716 assert(JDK_Version::is_gte_jdk16x_version(), "Must be JDK 1.6 or later"); 2717 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK); 2718 klassOop k = SystemDictionary::abstract_ownable_synchronizer_klass(); 2719 compute_offset(_owner_offset, k, 2720 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature()); 2721 } 2722 2723 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 2724 assert(_owner_offset != 0, "Must be initialized"); 2725 return obj->obj_field(_owner_offset); 2726 } 2727 2728 // Compute hard-coded offsets 2729 // Invoked before SystemDictionary::initialize, so pre-loaded classes 2730 // are not available to determine the offset_of_static_fields. 2731 void JavaClasses::compute_hard_coded_offsets() { 2732 const int x = heapOopSize; 2733 const int header = instanceOopDesc::base_offset_in_bytes(); 2734 2735 // Do the String Class 2736 java_lang_String::value_offset = java_lang_String::hc_value_offset * x + header; 2737 java_lang_String::offset_offset = java_lang_String::hc_offset_offset * x + header; 2738 java_lang_String::count_offset = java_lang_String::offset_offset + sizeof (jint); 2739 java_lang_String::hash_offset = java_lang_String::count_offset + sizeof (jint); 2740 2741 // Do the Class Class 2742 java_lang_Class::klass_offset = java_lang_Class::hc_klass_offset * x + header; 2743 java_lang_Class::array_klass_offset = java_lang_Class::hc_array_klass_offset * x + header; 2744 java_lang_Class::resolved_constructor_offset = java_lang_Class::hc_resolved_constructor_offset * x + header; 2745 2746 // This is NOT an offset 2747 java_lang_Class::number_of_fake_oop_fields = java_lang_Class::hc_number_of_fake_oop_fields; 2748 2749 // Throwable Class 2750 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header; 2751 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header; 2752 java_lang_Throwable::cause_offset = java_lang_Throwable::hc_cause_offset * x + header; 2753 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header; 2754 2755 // java_lang_boxing_object 2756 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header; 2757 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong); 2758 2759 // java_lang_ref_Reference: 2760 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header; 2761 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header; 2762 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header; 2763 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header; 2764 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x; 2765 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x; 2766 // Artificial fields for java_lang_ref_Reference 2767 // The first field is for the discovered field added in 1.4 2768 java_lang_ref_Reference::number_of_fake_oop_fields = 1; 2769 2770 // java_lang_ref_SoftReference Class 2771 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong); 2772 // Don't multiply static fields because they are always in wordSize units 2773 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x; 2774 2775 // java_lang_ClassLoader 2776 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header; 2777 2778 // java_lang_System 2779 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x; 2780 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x; 2781 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x; 2782 2783 // java_lang_StackTraceElement 2784 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header; 2785 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header; 2786 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header; 2787 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header; 2788 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header; 2789 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header; 2790 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header; 2791 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header; 2792 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header; 2793 2794 } 2795 2796 2797 // Compute non-hard-coded field offsets of all the classes in this file 2798 void JavaClasses::compute_offsets() { 2799 2800 java_lang_Class::compute_offsets(); 2801 java_lang_System::compute_offsets(); 2802 java_lang_Thread::compute_offsets(); 2803 java_lang_ThreadGroup::compute_offsets(); 2804 if (EnableMethodHandles) { 2805 java_dyn_MethodHandle::compute_offsets(); 2806 sun_dyn_MemberName::compute_offsets(); 2807 sun_dyn_DirectMethodHandle::compute_offsets(); 2808 sun_dyn_BoundMethodHandle::compute_offsets(); 2809 sun_dyn_AdapterMethodHandle::compute_offsets(); 2810 java_dyn_MethodType::compute_offsets(); 2811 java_dyn_MethodTypeForm::compute_offsets(); 2812 } 2813 if (EnableInvokeDynamic) { 2814 sun_dyn_CallSiteImpl::compute_offsets(); 2815 } 2816 java_security_AccessControlContext::compute_offsets(); 2817 // Initialize reflection classes. The layouts of these classes 2818 // changed with the new reflection implementation in JDK 1.4, and 2819 // since the Universe doesn't know what JDK version it is until this 2820 // point we defer computation of these offsets until now. 2821 java_lang_reflect_AccessibleObject::compute_offsets(); 2822 java_lang_reflect_Method::compute_offsets(); 2823 java_lang_reflect_Constructor::compute_offsets(); 2824 java_lang_reflect_Field::compute_offsets(); 2825 if (JDK_Version::is_gte_jdk14x_version()) { 2826 java_nio_Buffer::compute_offsets(); 2827 } 2828 if (JDK_Version::is_gte_jdk15x_version()) { 2829 sun_reflect_ConstantPool::compute_offsets(); 2830 sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets(); 2831 } 2832 sun_misc_AtomicLongCSImpl::compute_offsets(); 2833 2834 // generated interpreter code wants to know about the offsets we just computed: 2835 AbstractAssembler::update_delayed_values(); 2836 } 2837 2838 #ifndef PRODUCT 2839 2840 // These functions exist to assert the validity of hard-coded field offsets to guard 2841 // against changes in the class files 2842 2843 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 2844 EXCEPTION_MARK; 2845 fieldDescriptor fd; 2846 symbolHandle klass_sym = oopFactory::new_symbol_handle(klass_name, CATCH); 2847 klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 2848 instanceKlassHandle h_klass (THREAD, k); 2849 //instanceKlassHandle h_klass(klass); 2850 symbolHandle f_name = oopFactory::new_symbol_handle(field_name, CATCH); 2851 symbolHandle f_sig = oopFactory::new_symbol_handle(field_sig, CATCH); 2852 if (!h_klass->find_local_field(f_name(), f_sig(), &fd)) { 2853 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 2854 return false; 2855 } 2856 if (fd.is_static()) { 2857 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 2858 return false; 2859 } 2860 if (fd.offset() == hardcoded_offset ) { 2861 return true; 2862 } else { 2863 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.", 2864 klass_name, field_name, hardcoded_offset, fd.offset()); 2865 return false; 2866 } 2867 } 2868 2869 2870 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 2871 EXCEPTION_MARK; 2872 fieldDescriptor fd; 2873 symbolHandle klass_sym = oopFactory::new_symbol_handle(klass_name, CATCH); 2874 klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 2875 instanceKlassHandle h_klass (THREAD, k); 2876 symbolHandle f_name = oopFactory::new_symbol_handle(field_name, CATCH); 2877 symbolHandle f_sig = oopFactory::new_symbol_handle(field_sig, CATCH); 2878 if (!h_klass->find_local_field(f_name(), f_sig(), &fd)) { 2879 tty->print_cr("Static field %s.%s not found", klass_name, field_name); 2880 return false; 2881 } 2882 if (!fd.is_static()) { 2883 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name); 2884 return false; 2885 } 2886 if (fd.offset() == hardcoded_offset + h_klass->offset_of_static_fields()) { 2887 return true; 2888 } else { 2889 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()); 2890 return false; 2891 } 2892 } 2893 2894 2895 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) { 2896 EXCEPTION_MARK; 2897 fieldDescriptor fd; 2898 symbolHandle klass_sym = oopFactory::new_symbol_handle(klass_name, CATCH); 2899 klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 2900 instanceKlassHandle h_klass (THREAD, k); 2901 symbolHandle f_name = oopFactory::new_symbol_handle(field_name, CATCH); 2902 symbolHandle f_sig = oopFactory::new_symbol_handle(field_sig, CATCH); 2903 if (!h_klass->find_local_field(f_name(), f_sig(), &fd)) { 2904 tty->print_cr("Static field %s.%s not found", klass_name, field_name); 2905 return false; 2906 } 2907 if (!fd.is_static() || !fd.has_initial_value()) { 2908 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name); 2909 return false; 2910 } 2911 if (!fd.initial_value_tag().is_int()) { 2912 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name); 2913 return false; 2914 } 2915 jint field_value = fd.int_initial_value(); 2916 if (field_value == hardcoded_constant) { 2917 return true; 2918 } else { 2919 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); 2920 return false; 2921 } 2922 } 2923 2924 2925 // Check the hard-coded field offsets of all the classes in this file 2926 2927 void JavaClasses::check_offsets() { 2928 bool valid = true; 2929 2930 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 2931 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig) 2932 2933 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 2934 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig) 2935 2936 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 2937 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig) 2938 2939 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \ 2940 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig) 2941 2942 // java.lang.String 2943 2944 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C"); 2945 CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I"); 2946 CHECK_OFFSET("java/lang/String", java_lang_String, count, "I"); 2947 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I"); 2948 2949 // java.lang.Class 2950 2951 // Fake fields 2952 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked 2953 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked 2954 // CHECK_OFFSET("java/lang/Class", java_lang_Class, resolved_constructor); // %%% this needs to be checked 2955 2956 // java.lang.Throwable 2957 2958 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;"); 2959 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;"); 2960 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;"); 2961 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;"); 2962 2963 // Boxed primitive objects (java_lang_boxing_object) 2964 2965 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 2966 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 2967 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 2968 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 2969 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 2970 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 2971 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 2972 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 2973 2974 // java.lang.ClassLoader 2975 2976 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;"); 2977 2978 // java.lang.System 2979 2980 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;"); 2981 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;"); 2982 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;"); 2983 2984 // java.lang.StackTraceElement 2985 2986 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;"); 2987 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;"); 2988 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;"); 2989 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I"); 2990 2991 // java.lang.ref.Reference 2992 2993 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;"); 2994 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;"); 2995 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;"); 2996 // Fake field 2997 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;"); 2998 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;"); 2999 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;"); 3000 3001 // java.lang.ref.SoftReference 3002 3003 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J"); 3004 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J"); 3005 3006 // java.lang.AssertionStatusDirectives 3007 // 3008 // The CheckAssertionStatusDirectives boolean can be removed from here and 3009 // globals.hpp after the AssertionStatusDirectives class has been integrated 3010 // into merlin "for some time." Without it, the vm will fail with early 3011 // merlin builds. 3012 3013 if (CheckAssertionStatusDirectives && JDK_Version::is_gte_jdk14x_version()) { 3014 const char* nm = "java/lang/AssertionStatusDirectives"; 3015 const char* sig = "[Ljava/lang/String;"; 3016 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig); 3017 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z"); 3018 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig); 3019 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z"); 3020 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z"); 3021 } 3022 3023 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed"); 3024 } 3025 3026 #endif // PRODUCT 3027 3028 void javaClasses_init() { 3029 JavaClasses::compute_offsets(); 3030 JavaClasses::check_offsets(); 3031 FilteredFieldsMap::initialize(); // must be done after computing offsets. 3032 }