javaClasses.cpp revision 1472:c18cbe5936b8
1/* 2 * Copyright (c) 1997, 2009, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25# include "incls/_precompiled.incl" 26# include "incls/_javaClasses.cpp.incl" 27 28static 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 39static void 40compute_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 54static void 55compute_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 66Handle 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 97Handle 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 106Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) { 107 return basic_create_from_unicode(unicode, length, false, CHECK_NH); 108} 109 110Handle 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 114oop 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 119Handle 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 131oop 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 136Handle 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 146Handle 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. 172char* 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 200Handle 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 238jchar* 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 250symbolHandle 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 = (length == 0) ? NULL : value->char_at_addr(offset); 256 symbolOop sym = SymbolTable::lookup_unicode(base, length, THREAD); 257 return symbolHandle(THREAD, sym); 258} 259 260symbolOop 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 = (length == 0) ? NULL : value->char_at_addr(offset); 265 return SymbolTable::probe_unicode(base, length); 266} 267 268 269int 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 277char* 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 285char* 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 294bool 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 312void 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 334oop 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 378oop 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 391klassOop 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 399void 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 419symbolOop 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 441klassOop 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 448void 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 454methodOop 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 461void 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 467bool 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 475BasicType 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 489BasicType 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 503oop 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 510bool java_lang_Class::offsets_computed = false; 511int java_lang_Class::classRedefinedCount_offset = -1; 512int java_lang_Class::parallelCapable_offset = -1; 513 514void 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 533bool 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 542int 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 553void 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 573int java_lang_Thread::_name_offset = 0; 574int java_lang_Thread::_group_offset = 0; 575int java_lang_Thread::_contextClassLoader_offset = 0; 576int java_lang_Thread::_inheritedAccessControlContext_offset = 0; 577int java_lang_Thread::_priority_offset = 0; 578int java_lang_Thread::_eetop_offset = 0; 579int java_lang_Thread::_daemon_offset = 0; 580int java_lang_Thread::_stillborn_offset = 0; 581int java_lang_Thread::_stackSize_offset = 0; 582int java_lang_Thread::_tid_offset = 0; 583int java_lang_Thread::_thread_status_offset = 0; 584int java_lang_Thread::_park_blocker_offset = 0; 585int java_lang_Thread::_park_event_offset = 0 ; 586 587 588void 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 612JavaThread* java_lang_Thread::thread(oop java_thread) { 613 return (JavaThread*)java_thread->address_field(_eetop_offset); 614} 615 616 617void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) { 618 java_thread->address_field_put(_eetop_offset, (address)thread); 619} 620 621 622typeArrayOop 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 629void 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 635ThreadPriority java_lang_Thread::priority(oop java_thread) { 636 return (ThreadPriority)java_thread->int_field(_priority_offset); 637} 638 639 640void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) { 641 java_thread->int_field_put(_priority_offset, priority); 642} 643 644 645oop java_lang_Thread::threadGroup(oop java_thread) { 646 return java_thread->obj_field(_group_offset); 647} 648 649 650bool 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 656void java_lang_Thread::set_stillborn(oop java_thread) { 657 java_thread->bool_field_put(_stillborn_offset, true); 658} 659 660 661bool java_lang_Thread::is_alive(oop java_thread) { 662 JavaThread* thr = java_lang_Thread::thread(java_thread); 663 return (thr != NULL); 664} 665 666 667bool java_lang_Thread::is_daemon(oop java_thread) { 668 return java_thread->bool_field(_daemon_offset) != 0; 669} 670 671 672void java_lang_Thread::set_daemon(oop java_thread) { 673 java_thread->bool_field_put(_daemon_offset, true); 674} 675 676oop java_lang_Thread::context_class_loader(oop java_thread) { 677 return java_thread->obj_field(_contextClassLoader_offset); 678} 679 680oop java_lang_Thread::inherited_access_control_context(oop java_thread) { 681 return java_thread->obj_field(_inheritedAccessControlContext_offset); 682} 683 684 685jlong 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. 696void 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. 706java_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 728jlong 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 737oop 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 748jlong 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 755bool 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 764const 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} 780int java_lang_ThreadGroup::_parent_offset = 0; 781int java_lang_ThreadGroup::_name_offset = 0; 782int java_lang_ThreadGroup::_threads_offset = 0; 783int java_lang_ThreadGroup::_groups_offset = 0; 784int java_lang_ThreadGroup::_maxPriority_offset = 0; 785int java_lang_ThreadGroup::_destroyed_offset = 0; 786int java_lang_ThreadGroup::_daemon_offset = 0; 787int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0; 788int java_lang_ThreadGroup::_nthreads_offset = 0; 789int java_lang_ThreadGroup::_ngroups_offset = 0; 790 791oop 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 798typeArrayOop 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 804int 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 809objArrayOop 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 816int 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 821objArrayOop 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 827ThreadPriority 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 832bool 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 837bool 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 842bool 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 847void 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 864oop java_lang_Throwable::backtrace(oop throwable) { 865 return throwable->obj_field_acquire(backtrace_offset); 866} 867 868 869void java_lang_Throwable::set_backtrace(oop throwable, oop value) { 870 throwable->release_obj_field_put(backtrace_offset, value); 871} 872 873 874oop java_lang_Throwable::message(oop throwable) { 875 return throwable->obj_field(detailMessage_offset); 876} 877 878 879oop java_lang_Throwable::message(Handle throwable) { 880 return throwable->obj_field(detailMessage_offset); 881} 882 883 884void java_lang_Throwable::set_message(oop throwable, oop value) { 885 throwable->obj_field_put(detailMessage_offset, value); 886} 887 888 889void 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 895void 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 907void 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 919char* 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 963void 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 969void 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 975void 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 998const 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 1004void 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 1061void 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. 1096class 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 // The following appears to have been an optimization to save from 1125 // doing a barrier for each individual store into the _methods array, 1126 // but rather to do it for the entire array after the series of writes. 1127 // That optimization seems to have been lost when compressed oops was 1128 // implemented. However, the extra card-marks below was left in place, 1129 // but is now redundant because the individual stores into the 1130 // _methods array already execute the barrier code. CR 6918185 has 1131 // been filed so the original code may be restored by deferring the 1132 // barriers until after the entire sequence of stores, thus re-enabling 1133 // the intent of the original optimization. In the meantime the redundant 1134 // card mark below is now disabled. 1135 if (_dirty && _methods != NULL) { 1136#if 0 1137 BarrierSet* bs = Universe::heap()->barrier_set(); 1138 assert(bs->has_write_ref_array_opt(), "Barrier set must have ref array opt"); 1139 bs->write_ref_array((HeapWord*)_methods->base(), _methods->length()); 1140#endif 1141 _dirty = false; 1142 } 1143 } 1144 1145 void expand(TRAPS) { 1146 flush(); 1147 1148 objArrayHandle old_head(THREAD, _head); 1149 Pause_No_Safepoint_Verifier pnsv(&_nsv); 1150 1151 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK); 1152 objArrayHandle new_head(THREAD, head); 1153 1154 objArrayOop methods = oopFactory::new_objectArray(trace_chunk_size, CHECK); 1155 objArrayHandle new_methods(THREAD, methods); 1156 1157 typeArrayOop bcis = oopFactory::new_shortArray(trace_chunk_size, CHECK); 1158 typeArrayHandle new_bcis(THREAD, bcis); 1159 1160 if (!old_head.is_null()) { 1161 old_head->obj_at_put(trace_next_offset, new_head()); 1162 } 1163 new_head->obj_at_put(trace_methods_offset, new_methods()); 1164 new_head->obj_at_put(trace_bcis_offset, new_bcis()); 1165 1166 _head = new_head(); 1167 _methods = new_methods(); 1168 _bcis = new_bcis(); 1169 _index = 0; 1170 } 1171 1172 oop backtrace() { 1173 flush(); 1174 return _backtrace(); 1175 } 1176 1177 inline void push(methodOop method, short bci, TRAPS) { 1178 if (_index >= trace_chunk_size) { 1179 methodHandle mhandle(THREAD, method); 1180 expand(CHECK); 1181 method = mhandle(); 1182 } 1183 1184 _methods->obj_at_put(_index, method); 1185 _bcis->ushort_at_put(_index, bci); 1186 _index++; 1187 _dirty = true; 1188 } 1189 1190 methodOop current_method() { 1191 assert(_index >= 0 && _index < trace_chunk_size, "out of range"); 1192 return methodOop(_methods->obj_at(_index)); 1193 } 1194 1195 jushort current_bci() { 1196 assert(_index >= 0 && _index < trace_chunk_size, "out of range"); 1197 return _bcis->ushort_at(_index); 1198 } 1199}; 1200 1201 1202void java_lang_Throwable::fill_in_stack_trace(Handle throwable, TRAPS) { 1203 if (!StackTraceInThrowable) return; 1204 ResourceMark rm(THREAD); 1205 1206 // Start out by clearing the backtrace for this object, in case the VM 1207 // runs out of memory while allocating the stack trace 1208 set_backtrace(throwable(), NULL); 1209 if (JDK_Version::is_gte_jdk14x_version()) { 1210 // New since 1.4, clear lazily constructed Java level stacktrace if 1211 // refilling occurs 1212 clear_stacktrace(throwable()); 1213 } 1214 1215 int max_depth = MaxJavaStackTraceDepth; 1216 JavaThread* thread = (JavaThread*)THREAD; 1217 BacktraceBuilder bt(CHECK); 1218 1219 // Instead of using vframe directly, this version of fill_in_stack_trace 1220 // basically handles everything by hand. This significantly improved the 1221 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows. 1222 // See bug 6333838 for more details. 1223 // The "ASSERT" here is to verify this method generates the exactly same stack 1224 // trace as utilizing vframe. 1225#ifdef ASSERT 1226 vframeStream st(thread); 1227 methodHandle st_method(THREAD, st.method()); 1228#endif 1229 int total_count = 0; 1230 RegisterMap map(thread, false); 1231 int decode_offset = 0; 1232 nmethod* nm = NULL; 1233 bool skip_fillInStackTrace_check = false; 1234 bool skip_throwableInit_check = false; 1235 1236 for (frame fr = thread->last_frame(); max_depth != total_count;) { 1237 methodOop method = NULL; 1238 int bci = 0; 1239 1240 // Compiled java method case. 1241 if (decode_offset != 0) { 1242 DebugInfoReadStream stream(nm, decode_offset); 1243 decode_offset = stream.read_int(); 1244 method = (methodOop)nm->oop_at(stream.read_int()); 1245 bci = stream.read_bci(); 1246 } else { 1247 if (fr.is_first_frame()) break; 1248 address pc = fr.pc(); 1249 if (fr.is_interpreted_frame()) { 1250 intptr_t bcx = fr.interpreter_frame_bcx(); 1251 method = fr.interpreter_frame_method(); 1252 bci = fr.is_bci(bcx) ? bcx : method->bci_from((address)bcx); 1253 fr = fr.sender(&map); 1254 } else { 1255 CodeBlob* cb = fr.cb(); 1256 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL 1257 // but non nmethod 1258 fr = fr.sender(&map); 1259 if (cb == NULL || !cb->is_nmethod()) { 1260 continue; 1261 } 1262 nm = (nmethod*)cb; 1263 if (nm->method()->is_native()) { 1264 method = nm->method(); 1265 bci = 0; 1266 } else { 1267 PcDesc* pd = nm->pc_desc_at(pc); 1268 decode_offset = pd->scope_decode_offset(); 1269 // if decode_offset is not equal to 0, it will execute the 1270 // "compiled java method case" at the beginning of the loop. 1271 continue; 1272 } 1273 } 1274 } 1275#ifdef ASSERT 1276 assert(st_method() == method && st.bci() == bci, 1277 "Wrong stack trace"); 1278 st.next(); 1279 // vframeStream::method isn't GC-safe so store off a copy 1280 // of the methodOop in case we GC. 1281 if (!st.at_end()) { 1282 st_method = st.method(); 1283 } 1284#endif 1285 if (!skip_fillInStackTrace_check) { 1286 // check "fillInStackTrace" only once, so we negate the flag 1287 // after the first time check. 1288 skip_fillInStackTrace_check = true; 1289 if (method->name() == vmSymbols::fillInStackTrace_name()) { 1290 continue; 1291 } 1292 } 1293 // skip <init> methods of the exceptions klass. If there is <init> methods 1294 // that belongs to a superclass of the exception we are going to skipping 1295 // them in stack trace. This is simlar to classic VM. 1296 if (!skip_throwableInit_check) { 1297 if (method->name() == vmSymbols::object_initializer_name() && 1298 throwable->is_a(method->method_holder())) { 1299 continue; 1300 } else { 1301 // if no "Throwable.init()" method found, we stop checking it next time. 1302 skip_throwableInit_check = true; 1303 } 1304 } 1305 bt.push(method, bci, CHECK); 1306 total_count++; 1307 } 1308 1309 // Put completed stack trace into throwable object 1310 set_backtrace(throwable(), bt.backtrace()); 1311} 1312 1313void java_lang_Throwable::fill_in_stack_trace(Handle throwable) { 1314 // No-op if stack trace is disabled 1315 if (!StackTraceInThrowable) { 1316 return; 1317 } 1318 1319 // Disable stack traces for some preallocated out of memory errors 1320 if (!Universe::should_fill_in_stack_trace(throwable)) { 1321 return; 1322 } 1323 1324 PRESERVE_EXCEPTION_MARK; 1325 1326 JavaThread* thread = JavaThread::active(); 1327 fill_in_stack_trace(throwable, thread); 1328 // ignore exceptions thrown during stack trace filling 1329 CLEAR_PENDING_EXCEPTION; 1330} 1331 1332void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 1333 // Allocate stack trace - backtrace is created but not filled in 1334 1335 // No-op if stack trace is disabled 1336 if (!StackTraceInThrowable) return; 1337 1338 objArrayOop h_oop = oopFactory::new_objectArray(trace_size, CHECK); 1339 objArrayHandle backtrace (THREAD, h_oop); 1340 objArrayOop m_oop = oopFactory::new_objectArray(trace_chunk_size, CHECK); 1341 objArrayHandle methods (THREAD, m_oop); 1342 typeArrayOop b = oopFactory::new_shortArray(trace_chunk_size, CHECK); 1343 typeArrayHandle bcis(THREAD, b); 1344 1345 // backtrace has space for one chunk (next is NULL) 1346 backtrace->obj_at_put(trace_methods_offset, methods()); 1347 backtrace->obj_at_put(trace_bcis_offset, bcis()); 1348 set_backtrace(throwable(), backtrace()); 1349} 1350 1351 1352void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 1353 // Fill in stack trace into preallocated backtrace (no GC) 1354 1355 // No-op if stack trace is disabled 1356 if (!StackTraceInThrowable) return; 1357 1358 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check"); 1359 1360 oop backtrace = java_lang_Throwable::backtrace(throwable()); 1361 assert(backtrace != NULL, "backtrace not preallocated"); 1362 1363 oop m = objArrayOop(backtrace)->obj_at(trace_methods_offset); 1364 objArrayOop methods = objArrayOop(m); 1365 assert(methods != NULL && methods->length() > 0, "method array not preallocated"); 1366 1367 oop b = objArrayOop(backtrace)->obj_at(trace_bcis_offset); 1368 typeArrayOop bcis = typeArrayOop(b); 1369 assert(bcis != NULL, "bci array not preallocated"); 1370 1371 assert(methods->length() == bcis->length(), "method and bci arrays should match"); 1372 1373 JavaThread* thread = JavaThread::current(); 1374 ResourceMark rm(thread); 1375 vframeStream st(thread); 1376 1377 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 1378 // methods as preallocated errors aren't created by "java" code. 1379 1380 // fill in as much stack trace as possible 1381 int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth); 1382 int chunk_count = 0; 1383 1384 for (;!st.at_end(); st.next()) { 1385 // add element 1386 bcis->ushort_at_put(chunk_count, st.bci()); 1387 methods->obj_at_put(chunk_count, st.method()); 1388 1389 chunk_count++; 1390 1391 // Bail-out for deep stacks 1392 if (chunk_count >= max_chunks) break; 1393 } 1394} 1395 1396 1397int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) { 1398 if (throwable == NULL) { 1399 THROW_0(vmSymbols::java_lang_NullPointerException()); 1400 } 1401 objArrayOop chunk = objArrayOop(backtrace(throwable)); 1402 int depth = 0; 1403 if (chunk != NULL) { 1404 // Iterate over chunks and count full ones 1405 while (true) { 1406 objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset)); 1407 if (next == NULL) break; 1408 depth += trace_chunk_size; 1409 chunk = next; 1410 } 1411 assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check"); 1412 // Count element in remaining partial chunk 1413 objArrayOop methods = objArrayOop(chunk->obj_at(trace_methods_offset)); 1414 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 1415 assert(methods != NULL && bcis != NULL, "sanity check"); 1416 for (int i = 0; i < methods->length(); i++) { 1417 if (methods->obj_at(i) == NULL) break; 1418 depth++; 1419 } 1420 } 1421 return depth; 1422} 1423 1424 1425oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) { 1426 if (throwable == NULL) { 1427 THROW_0(vmSymbols::java_lang_NullPointerException()); 1428 } 1429 if (index < 0) { 1430 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 1431 } 1432 // Compute how many chunks to skip and index into actual chunk 1433 objArrayOop chunk = objArrayOop(backtrace(throwable)); 1434 int skip_chunks = index / trace_chunk_size; 1435 int chunk_index = index % trace_chunk_size; 1436 while (chunk != NULL && skip_chunks > 0) { 1437 chunk = objArrayOop(chunk->obj_at(trace_next_offset)); 1438 skip_chunks--; 1439 } 1440 if (chunk == NULL) { 1441 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 1442 } 1443 // Get method,bci from chunk 1444 objArrayOop methods = objArrayOop(chunk->obj_at(trace_methods_offset)); 1445 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 1446 assert(methods != NULL && bcis != NULL, "sanity check"); 1447 methodHandle method(THREAD, methodOop(methods->obj_at(chunk_index))); 1448 int bci = bcis->ushort_at(chunk_index); 1449 // Chunk can be partial full 1450 if (method.is_null()) { 1451 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 1452 } 1453 1454 oop element = java_lang_StackTraceElement::create(method, bci, CHECK_0); 1455 return element; 1456} 1457 1458oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) { 1459 // SystemDictionary::stackTraceElement_klass() will be null for pre-1.4 JDKs 1460 assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4"); 1461 1462 // Allocate java.lang.StackTraceElement instance 1463 klassOop k = SystemDictionary::StackTraceElement_klass(); 1464 assert(k != NULL, "must be loaded in 1.4+"); 1465 instanceKlassHandle ik (THREAD, k); 1466 if (ik->should_be_initialized()) { 1467 ik->initialize(CHECK_0); 1468 } 1469 1470 Handle element = ik->allocate_instance_handle(CHECK_0); 1471 // Fill in class name 1472 ResourceMark rm(THREAD); 1473 const char* str = instanceKlass::cast(method->method_holder())->external_name(); 1474 oop classname = StringTable::intern((char*) str, CHECK_0); 1475 java_lang_StackTraceElement::set_declaringClass(element(), classname); 1476 // Fill in method name 1477 oop methodname = StringTable::intern(method->name(), CHECK_0); 1478 java_lang_StackTraceElement::set_methodName(element(), methodname); 1479 // Fill in source file name 1480 symbolOop source = instanceKlass::cast(method->method_holder())->source_file_name(); 1481 oop filename = StringTable::intern(source, CHECK_0); 1482 java_lang_StackTraceElement::set_fileName(element(), filename); 1483 // File in source line number 1484 int line_number; 1485 if (method->is_native()) { 1486 // Negative value different from -1 below, enabling Java code in 1487 // class java.lang.StackTraceElement to distinguish "native" from 1488 // "no LineNumberTable". 1489 line_number = -2; 1490 } else { 1491 // Returns -1 if no LineNumberTable, and otherwise actual line number 1492 line_number = method->line_number_from_bci(bci); 1493 } 1494 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 1495 1496 return element(); 1497} 1498 1499 1500void java_lang_reflect_AccessibleObject::compute_offsets() { 1501 klassOop k = SystemDictionary::reflect_AccessibleObject_klass(); 1502 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature()); 1503} 1504 1505jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 1506 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1507 return (jboolean) reflect->bool_field(override_offset); 1508} 1509 1510void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 1511 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1512 reflect->bool_field_put(override_offset, (int) value); 1513} 1514 1515void java_lang_reflect_Method::compute_offsets() { 1516 klassOop k = SystemDictionary::reflect_Method_klass(); 1517 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 1518 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1519 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature()); 1520 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 1521 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 1522 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 1523 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 1524 // The generic signature and annotations fields are only present in 1.5 1525 signature_offset = -1; 1526 annotations_offset = -1; 1527 parameter_annotations_offset = -1; 1528 annotation_default_offset = -1; 1529 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 1530 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 1531 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 1532 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature()); 1533} 1534 1535Handle java_lang_reflect_Method::create(TRAPS) { 1536 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1537 klassOop klass = SystemDictionary::reflect_Method_klass(); 1538 // This class is eagerly initialized during VM initialization, since we keep a refence 1539 // to one of the methods 1540 assert(instanceKlass::cast(klass)->is_initialized(), "must be initialized"); 1541 return instanceKlass::cast(klass)->allocate_instance_handle(CHECK_NH); 1542} 1543 1544oop java_lang_reflect_Method::clazz(oop reflect) { 1545 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1546 return reflect->obj_field(clazz_offset); 1547} 1548 1549void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 1550 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1551 reflect->obj_field_put(clazz_offset, value); 1552} 1553 1554int java_lang_reflect_Method::slot(oop reflect) { 1555 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1556 return reflect->int_field(slot_offset); 1557} 1558 1559void java_lang_reflect_Method::set_slot(oop reflect, int value) { 1560 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1561 reflect->int_field_put(slot_offset, value); 1562} 1563 1564oop java_lang_reflect_Method::name(oop method) { 1565 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1566 return method->obj_field(name_offset); 1567} 1568 1569void java_lang_reflect_Method::set_name(oop method, oop value) { 1570 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1571 method->obj_field_put(name_offset, value); 1572} 1573 1574oop java_lang_reflect_Method::return_type(oop method) { 1575 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1576 return method->obj_field(returnType_offset); 1577} 1578 1579void java_lang_reflect_Method::set_return_type(oop method, oop value) { 1580 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1581 method->obj_field_put(returnType_offset, value); 1582} 1583 1584oop java_lang_reflect_Method::parameter_types(oop method) { 1585 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1586 return method->obj_field(parameterTypes_offset); 1587} 1588 1589void java_lang_reflect_Method::set_parameter_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(parameterTypes_offset, value); 1592} 1593 1594oop java_lang_reflect_Method::exception_types(oop method) { 1595 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1596 return method->obj_field(exceptionTypes_offset); 1597} 1598 1599void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 1600 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1601 method->obj_field_put(exceptionTypes_offset, value); 1602} 1603 1604int java_lang_reflect_Method::modifiers(oop method) { 1605 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1606 return method->int_field(modifiers_offset); 1607} 1608 1609void java_lang_reflect_Method::set_modifiers(oop method, int value) { 1610 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1611 method->int_field_put(modifiers_offset, value); 1612} 1613 1614bool java_lang_reflect_Method::has_signature_field() { 1615 return (signature_offset >= 0); 1616} 1617 1618oop java_lang_reflect_Method::signature(oop method) { 1619 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1620 assert(has_signature_field(), "signature field must be present"); 1621 return method->obj_field(signature_offset); 1622} 1623 1624void java_lang_reflect_Method::set_signature(oop method, oop value) { 1625 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1626 assert(has_signature_field(), "signature field must be present"); 1627 method->obj_field_put(signature_offset, value); 1628} 1629 1630bool java_lang_reflect_Method::has_annotations_field() { 1631 return (annotations_offset >= 0); 1632} 1633 1634oop java_lang_reflect_Method::annotations(oop method) { 1635 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1636 assert(has_annotations_field(), "annotations field must be present"); 1637 return method->obj_field(annotations_offset); 1638} 1639 1640void java_lang_reflect_Method::set_annotations(oop method, oop value) { 1641 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1642 assert(has_annotations_field(), "annotations field must be present"); 1643 method->obj_field_put(annotations_offset, value); 1644} 1645 1646bool java_lang_reflect_Method::has_parameter_annotations_field() { 1647 return (parameter_annotations_offset >= 0); 1648} 1649 1650oop java_lang_reflect_Method::parameter_annotations(oop method) { 1651 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1652 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 1653 return method->obj_field(parameter_annotations_offset); 1654} 1655 1656void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 1657 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1658 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 1659 method->obj_field_put(parameter_annotations_offset, value); 1660} 1661 1662bool java_lang_reflect_Method::has_annotation_default_field() { 1663 return (annotation_default_offset >= 0); 1664} 1665 1666oop java_lang_reflect_Method::annotation_default(oop method) { 1667 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1668 assert(has_annotation_default_field(), "annotation default field must be present"); 1669 return method->obj_field(annotation_default_offset); 1670} 1671 1672void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 1673 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1674 assert(has_annotation_default_field(), "annotation default field must be present"); 1675 method->obj_field_put(annotation_default_offset, value); 1676} 1677 1678void java_lang_reflect_Constructor::compute_offsets() { 1679 klassOop k = SystemDictionary::reflect_Constructor_klass(); 1680 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 1681 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 1682 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 1683 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 1684 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 1685 // The generic signature and annotations fields are only present in 1.5 1686 signature_offset = -1; 1687 annotations_offset = -1; 1688 parameter_annotations_offset = -1; 1689 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 1690 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 1691 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 1692} 1693 1694Handle java_lang_reflect_Constructor::create(TRAPS) { 1695 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1696 symbolHandle name = vmSymbolHandles::java_lang_reflect_Constructor(); 1697 klassOop k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 1698 instanceKlassHandle klass (THREAD, k); 1699 // Ensure it is initialized 1700 klass->initialize(CHECK_NH); 1701 return klass->allocate_instance_handle(CHECK_NH); 1702} 1703 1704oop java_lang_reflect_Constructor::clazz(oop reflect) { 1705 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1706 return reflect->obj_field(clazz_offset); 1707} 1708 1709void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 1710 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1711 reflect->obj_field_put(clazz_offset, value); 1712} 1713 1714oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 1715 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1716 return constructor->obj_field(parameterTypes_offset); 1717} 1718 1719void java_lang_reflect_Constructor::set_parameter_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(parameterTypes_offset, value); 1722} 1723 1724oop java_lang_reflect_Constructor::exception_types(oop constructor) { 1725 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1726 return constructor->obj_field(exceptionTypes_offset); 1727} 1728 1729void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 1730 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1731 constructor->obj_field_put(exceptionTypes_offset, value); 1732} 1733 1734int java_lang_reflect_Constructor::slot(oop reflect) { 1735 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1736 return reflect->int_field(slot_offset); 1737} 1738 1739void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 1740 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1741 reflect->int_field_put(slot_offset, value); 1742} 1743 1744int java_lang_reflect_Constructor::modifiers(oop constructor) { 1745 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1746 return constructor->int_field(modifiers_offset); 1747} 1748 1749void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 1750 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1751 constructor->int_field_put(modifiers_offset, value); 1752} 1753 1754bool java_lang_reflect_Constructor::has_signature_field() { 1755 return (signature_offset >= 0); 1756} 1757 1758oop java_lang_reflect_Constructor::signature(oop constructor) { 1759 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1760 assert(has_signature_field(), "signature field must be present"); 1761 return constructor->obj_field(signature_offset); 1762} 1763 1764void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 1765 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1766 assert(has_signature_field(), "signature field must be present"); 1767 constructor->obj_field_put(signature_offset, value); 1768} 1769 1770bool java_lang_reflect_Constructor::has_annotations_field() { 1771 return (annotations_offset >= 0); 1772} 1773 1774oop java_lang_reflect_Constructor::annotations(oop constructor) { 1775 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1776 assert(has_annotations_field(), "annotations field must be present"); 1777 return constructor->obj_field(annotations_offset); 1778} 1779 1780void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 1781 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1782 assert(has_annotations_field(), "annotations field must be present"); 1783 constructor->obj_field_put(annotations_offset, value); 1784} 1785 1786bool java_lang_reflect_Constructor::has_parameter_annotations_field() { 1787 return (parameter_annotations_offset >= 0); 1788} 1789 1790oop java_lang_reflect_Constructor::parameter_annotations(oop method) { 1791 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1792 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 1793 return method->obj_field(parameter_annotations_offset); 1794} 1795 1796void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 1797 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1798 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 1799 method->obj_field_put(parameter_annotations_offset, value); 1800} 1801 1802void java_lang_reflect_Field::compute_offsets() { 1803 klassOop k = SystemDictionary::reflect_Field_klass(); 1804 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 1805 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1806 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature()); 1807 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 1808 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 1809 // The generic signature and annotations fields are only present in 1.5 1810 signature_offset = -1; 1811 annotations_offset = -1; 1812 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 1813 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 1814} 1815 1816Handle java_lang_reflect_Field::create(TRAPS) { 1817 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1818 symbolHandle name = vmSymbolHandles::java_lang_reflect_Field(); 1819 klassOop k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 1820 instanceKlassHandle klass (THREAD, k); 1821 // Ensure it is initialized 1822 klass->initialize(CHECK_NH); 1823 return klass->allocate_instance_handle(CHECK_NH); 1824} 1825 1826oop java_lang_reflect_Field::clazz(oop reflect) { 1827 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1828 return reflect->obj_field(clazz_offset); 1829} 1830 1831void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 1832 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1833 reflect->obj_field_put(clazz_offset, value); 1834} 1835 1836oop java_lang_reflect_Field::name(oop field) { 1837 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1838 return field->obj_field(name_offset); 1839} 1840 1841void java_lang_reflect_Field::set_name(oop field, oop value) { 1842 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1843 field->obj_field_put(name_offset, value); 1844} 1845 1846oop java_lang_reflect_Field::type(oop field) { 1847 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1848 return field->obj_field(type_offset); 1849} 1850 1851void java_lang_reflect_Field::set_type(oop field, oop value) { 1852 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1853 field->obj_field_put(type_offset, value); 1854} 1855 1856int java_lang_reflect_Field::slot(oop reflect) { 1857 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1858 return reflect->int_field(slot_offset); 1859} 1860 1861void java_lang_reflect_Field::set_slot(oop reflect, int value) { 1862 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1863 reflect->int_field_put(slot_offset, value); 1864} 1865 1866int java_lang_reflect_Field::modifiers(oop field) { 1867 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1868 return field->int_field(modifiers_offset); 1869} 1870 1871void java_lang_reflect_Field::set_modifiers(oop field, int value) { 1872 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1873 field->int_field_put(modifiers_offset, value); 1874} 1875 1876bool java_lang_reflect_Field::has_signature_field() { 1877 return (signature_offset >= 0); 1878} 1879 1880oop java_lang_reflect_Field::signature(oop field) { 1881 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1882 assert(has_signature_field(), "signature field must be present"); 1883 return field->obj_field(signature_offset); 1884} 1885 1886void java_lang_reflect_Field::set_signature(oop field, oop value) { 1887 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1888 assert(has_signature_field(), "signature field must be present"); 1889 field->obj_field_put(signature_offset, value); 1890} 1891 1892bool java_lang_reflect_Field::has_annotations_field() { 1893 return (annotations_offset >= 0); 1894} 1895 1896oop java_lang_reflect_Field::annotations(oop field) { 1897 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1898 assert(has_annotations_field(), "annotations field must be present"); 1899 return field->obj_field(annotations_offset); 1900} 1901 1902void java_lang_reflect_Field::set_annotations(oop field, oop value) { 1903 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1904 assert(has_annotations_field(), "annotations field must be present"); 1905 field->obj_field_put(annotations_offset, value); 1906} 1907 1908 1909void sun_reflect_ConstantPool::compute_offsets() { 1910 klassOop k = SystemDictionary::reflect_ConstantPool_klass(); 1911 // This null test can be removed post beta 1912 if (k != NULL) { 1913 compute_offset(_cp_oop_offset, k, vmSymbols::constantPoolOop_name(), vmSymbols::object_signature()); 1914 } 1915} 1916 1917 1918Handle sun_reflect_ConstantPool::create(TRAPS) { 1919 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1920 klassOop k = SystemDictionary::reflect_ConstantPool_klass(); 1921 instanceKlassHandle klass (THREAD, k); 1922 // Ensure it is initialized 1923 klass->initialize(CHECK_NH); 1924 return klass->allocate_instance_handle(CHECK_NH); 1925} 1926 1927 1928oop sun_reflect_ConstantPool::cp_oop(oop reflect) { 1929 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1930 return reflect->obj_field(_cp_oop_offset); 1931} 1932 1933 1934void sun_reflect_ConstantPool::set_cp_oop(oop reflect, oop value) { 1935 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1936 reflect->obj_field_put(_cp_oop_offset, value); 1937} 1938 1939void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() { 1940 klassOop k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass(); 1941 // This null test can be removed post beta 1942 if (k != NULL) { 1943 compute_offset(_base_offset, k, 1944 vmSymbols::base_name(), vmSymbols::object_signature()); 1945 } 1946} 1947 1948oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 1949 klassOop k = SystemDictionary::box_klass(type); 1950 if (k == NULL) return NULL; 1951 instanceKlassHandle h (THREAD, k); 1952 if (!h->is_initialized()) h->initialize(CHECK_0); 1953 return h->allocate_instance(THREAD); 1954} 1955 1956 1957oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 1958 oop box = initialize_and_allocate(type, CHECK_0); 1959 if (box == NULL) return NULL; 1960 switch (type) { 1961 case T_BOOLEAN: 1962 box->bool_field_put(value_offset, value->z); 1963 break; 1964 case T_CHAR: 1965 box->char_field_put(value_offset, value->c); 1966 break; 1967 case T_FLOAT: 1968 box->float_field_put(value_offset, value->f); 1969 break; 1970 case T_DOUBLE: 1971 box->double_field_put(long_value_offset, value->d); 1972 break; 1973 case T_BYTE: 1974 box->byte_field_put(value_offset, value->b); 1975 break; 1976 case T_SHORT: 1977 box->short_field_put(value_offset, value->s); 1978 break; 1979 case T_INT: 1980 box->int_field_put(value_offset, value->i); 1981 break; 1982 case T_LONG: 1983 box->long_field_put(long_value_offset, value->j); 1984 break; 1985 default: 1986 return NULL; 1987 } 1988 return box; 1989} 1990 1991 1992BasicType java_lang_boxing_object::basic_type(oop box) { 1993 if (box == NULL) return T_ILLEGAL; 1994 BasicType type = SystemDictionary::box_klass_type(box->klass()); 1995 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 1996 return T_ILLEGAL; 1997 return type; 1998} 1999 2000 2001BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 2002 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2003 switch (type) { 2004 case T_BOOLEAN: 2005 value->z = box->bool_field(value_offset); 2006 break; 2007 case T_CHAR: 2008 value->c = box->char_field(value_offset); 2009 break; 2010 case T_FLOAT: 2011 value->f = box->float_field(value_offset); 2012 break; 2013 case T_DOUBLE: 2014 value->d = box->double_field(long_value_offset); 2015 break; 2016 case T_BYTE: 2017 value->b = box->byte_field(value_offset); 2018 break; 2019 case T_SHORT: 2020 value->s = box->short_field(value_offset); 2021 break; 2022 case T_INT: 2023 value->i = box->int_field(value_offset); 2024 break; 2025 case T_LONG: 2026 value->j = box->long_field(long_value_offset); 2027 break; 2028 default: 2029 return T_ILLEGAL; 2030 } // end switch 2031 return type; 2032} 2033 2034 2035BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 2036 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2037 switch (type) { 2038 case T_BOOLEAN: 2039 box->bool_field_put(value_offset, value->z); 2040 break; 2041 case T_CHAR: 2042 box->char_field_put(value_offset, value->c); 2043 break; 2044 case T_FLOAT: 2045 box->float_field_put(value_offset, value->f); 2046 break; 2047 case T_DOUBLE: 2048 box->double_field_put(long_value_offset, value->d); 2049 break; 2050 case T_BYTE: 2051 box->byte_field_put(value_offset, value->b); 2052 break; 2053 case T_SHORT: 2054 box->short_field_put(value_offset, value->s); 2055 break; 2056 case T_INT: 2057 box->int_field_put(value_offset, value->i); 2058 break; 2059 case T_LONG: 2060 box->long_field_put(long_value_offset, value->j); 2061 break; 2062 default: 2063 return T_ILLEGAL; 2064 } // end switch 2065 return type; 2066} 2067 2068 2069void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) { 2070 switch (type) { 2071 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break; 2072 case T_CHAR: st->print("%d", value->c); break; 2073 case T_BYTE: st->print("%d", value->b); break; 2074 case T_SHORT: st->print("%d", value->s); break; 2075 case T_INT: st->print("%d", value->i); break; 2076 case T_LONG: st->print(INT64_FORMAT, value->j); break; 2077 case T_FLOAT: st->print("%f", value->f); break; 2078 case T_DOUBLE: st->print("%lf", value->d); break; 2079 default: st->print("type %d?", type); break; 2080 } 2081} 2082 2083 2084// Support for java_lang_ref_Reference 2085oop java_lang_ref_Reference::pending_list_lock() { 2086 instanceKlass* ik = instanceKlass::cast(SystemDictionary::Reference_klass()); 2087 char *addr = (((char *)ik->start_of_static_fields()) + static_lock_offset); 2088 if (UseCompressedOops) { 2089 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 2090 } else { 2091 return oopDesc::load_decode_heap_oop((oop*)addr); 2092 } 2093} 2094 2095HeapWord *java_lang_ref_Reference::pending_list_addr() { 2096 instanceKlass* ik = instanceKlass::cast(SystemDictionary::Reference_klass()); 2097 char *addr = (((char *)ik->start_of_static_fields()) + static_pending_offset); 2098 // XXX This might not be HeapWord aligned, almost rather be char *. 2099 return (HeapWord*)addr; 2100} 2101 2102oop java_lang_ref_Reference::pending_list() { 2103 char *addr = (char *)pending_list_addr(); 2104 if (UseCompressedOops) { 2105 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 2106 } else { 2107 return oopDesc::load_decode_heap_oop((oop*)addr); 2108 } 2109} 2110 2111 2112// Support for java_lang_ref_SoftReference 2113 2114jlong java_lang_ref_SoftReference::timestamp(oop ref) { 2115 return ref->long_field(timestamp_offset); 2116} 2117 2118jlong java_lang_ref_SoftReference::clock() { 2119 instanceKlass* ik = instanceKlass::cast(SystemDictionary::SoftReference_klass()); 2120 int offset = ik->offset_of_static_fields() + static_clock_offset; 2121 2122 return SystemDictionary::SoftReference_klass()->long_field(offset); 2123} 2124 2125void java_lang_ref_SoftReference::set_clock(jlong value) { 2126 instanceKlass* ik = instanceKlass::cast(SystemDictionary::SoftReference_klass()); 2127 int offset = ik->offset_of_static_fields() + static_clock_offset; 2128 2129 SystemDictionary::SoftReference_klass()->long_field_put(offset, value); 2130} 2131 2132 2133// Support for java_dyn_MethodHandle 2134 2135int java_dyn_MethodHandle::_type_offset; 2136int java_dyn_MethodHandle::_vmtarget_offset; 2137int java_dyn_MethodHandle::_vmentry_offset; 2138int java_dyn_MethodHandle::_vmslots_offset; 2139 2140int sun_dyn_MemberName::_clazz_offset; 2141int sun_dyn_MemberName::_name_offset; 2142int sun_dyn_MemberName::_type_offset; 2143int sun_dyn_MemberName::_flags_offset; 2144int sun_dyn_MemberName::_vmtarget_offset; 2145int sun_dyn_MemberName::_vmindex_offset; 2146 2147int sun_dyn_DirectMethodHandle::_vmindex_offset; 2148 2149int sun_dyn_BoundMethodHandle::_argument_offset; 2150int sun_dyn_BoundMethodHandle::_vmargslot_offset; 2151 2152int sun_dyn_AdapterMethodHandle::_conversion_offset; 2153 2154void java_dyn_MethodHandle::compute_offsets() { 2155 klassOop k = SystemDictionary::MethodHandle_klass(); 2156 if (k != NULL && EnableMethodHandles) { 2157 compute_offset(_type_offset, k, vmSymbols::type_name(), vmSymbols::java_dyn_MethodType_signature(), true); 2158 compute_offset(_vmtarget_offset, k, vmSymbols::vmtarget_name(), vmSymbols::object_signature(), true); 2159 compute_offset(_vmentry_offset, k, vmSymbols::vmentry_name(), vmSymbols::machine_word_signature(), true); 2160 2161 // Note: MH.vmslots (if it is present) is a hoisted copy of MH.type.form.vmslots. 2162 // It is optional pending experiments to keep or toss. 2163 compute_optional_offset(_vmslots_offset, k, vmSymbols::vmslots_name(), vmSymbols::int_signature(), true); 2164 } 2165} 2166 2167void sun_dyn_MemberName::compute_offsets() { 2168 klassOop k = SystemDictionary::MemberName_klass(); 2169 if (k != NULL && EnableMethodHandles) { 2170 compute_offset(_clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2171 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2172 compute_offset(_type_offset, k, vmSymbols::type_name(), vmSymbols::object_signature()); 2173 compute_offset(_flags_offset, k, vmSymbols::flags_name(), vmSymbols::int_signature()); 2174 compute_offset(_vmtarget_offset, k, vmSymbols::vmtarget_name(), vmSymbols::object_signature()); 2175 compute_offset(_vmindex_offset, k, vmSymbols::vmindex_name(), vmSymbols::int_signature()); 2176 } 2177} 2178 2179void sun_dyn_DirectMethodHandle::compute_offsets() { 2180 klassOop k = SystemDictionary::DirectMethodHandle_klass(); 2181 if (k != NULL && EnableMethodHandles) { 2182 compute_offset(_vmindex_offset, k, vmSymbols::vmindex_name(), vmSymbols::int_signature(), true); 2183 } 2184} 2185 2186void sun_dyn_BoundMethodHandle::compute_offsets() { 2187 klassOop k = SystemDictionary::BoundMethodHandle_klass(); 2188 if (k != NULL && EnableMethodHandles) { 2189 compute_offset(_vmargslot_offset, k, vmSymbols::vmargslot_name(), vmSymbols::int_signature(), true); 2190 compute_offset(_argument_offset, k, vmSymbols::argument_name(), vmSymbols::object_signature(), true); 2191 } 2192} 2193 2194void sun_dyn_AdapterMethodHandle::compute_offsets() { 2195 klassOop k = SystemDictionary::AdapterMethodHandle_klass(); 2196 if (k != NULL && EnableMethodHandles) { 2197 compute_offset(_conversion_offset, k, vmSymbols::conversion_name(), vmSymbols::int_signature(), true); 2198 } 2199} 2200 2201oop java_dyn_MethodHandle::type(oop mh) { 2202 return mh->obj_field(_type_offset); 2203} 2204 2205void java_dyn_MethodHandle::set_type(oop mh, oop mtype) { 2206 mh->obj_field_put(_type_offset, mtype); 2207} 2208 2209int java_dyn_MethodHandle::vmslots(oop mh) { 2210 int vmslots_offset = _vmslots_offset; 2211 if (vmslots_offset != 0) { 2212#ifdef ASSERT 2213 int x = mh->int_field(vmslots_offset); 2214 int y = compute_vmslots(mh); 2215 assert(x == y, "correct hoisted value"); 2216#endif 2217 return mh->int_field(vmslots_offset); 2218 } else { 2219 return compute_vmslots(mh); 2220 } 2221} 2222 2223// if MH.vmslots exists, hoist into it the value of type.form.vmslots 2224void java_dyn_MethodHandle::init_vmslots(oop mh) { 2225 int vmslots_offset = _vmslots_offset; 2226 if (vmslots_offset != 0) { 2227 mh->int_field_put(vmslots_offset, compute_vmslots(mh)); 2228 } 2229} 2230 2231// fetch type.form.vmslots, which is the number of JVM stack slots 2232// required to carry the arguments of this MH 2233int java_dyn_MethodHandle::compute_vmslots(oop mh) { 2234 oop mtype = type(mh); 2235 if (mtype == NULL) return 0; // Java code would get NPE 2236 oop form = java_dyn_MethodType::form(mtype); 2237 if (form == NULL) return 0; // Java code would get NPE 2238 return java_dyn_MethodTypeForm::vmslots(form); 2239} 2240 2241// fetch the low-level entry point for this mh 2242MethodHandleEntry* java_dyn_MethodHandle::vmentry(oop mh) { 2243 return (MethodHandleEntry*) mh->address_field(_vmentry_offset); 2244} 2245 2246void java_dyn_MethodHandle::set_vmentry(oop mh, MethodHandleEntry* me) { 2247 assert(_vmentry_offset != 0, "must be present"); 2248 2249 // This is always the final step that initializes a valid method handle: 2250 mh->release_address_field_put(_vmentry_offset, (address) me); 2251 2252 // There should be enough memory barriers on exit from native methods 2253 // to ensure that the MH is fully initialized to all threads before 2254 // Java code can publish it in global data structures. 2255 // But just in case, we use release_address_field_put. 2256} 2257 2258/// MemberName accessors 2259 2260oop sun_dyn_MemberName::clazz(oop mname) { 2261 assert(is_instance(mname), "wrong type"); 2262 return mname->obj_field(_clazz_offset); 2263} 2264 2265void sun_dyn_MemberName::set_clazz(oop mname, oop clazz) { 2266 assert(is_instance(mname), "wrong type"); 2267 mname->obj_field_put(_clazz_offset, clazz); 2268} 2269 2270oop sun_dyn_MemberName::name(oop mname) { 2271 assert(is_instance(mname), "wrong type"); 2272 return mname->obj_field(_name_offset); 2273} 2274 2275void sun_dyn_MemberName::set_name(oop mname, oop name) { 2276 assert(is_instance(mname), "wrong type"); 2277 mname->obj_field_put(_name_offset, name); 2278} 2279 2280oop sun_dyn_MemberName::type(oop mname) { 2281 assert(is_instance(mname), "wrong type"); 2282 return mname->obj_field(_type_offset); 2283} 2284 2285void sun_dyn_MemberName::set_type(oop mname, oop type) { 2286 assert(is_instance(mname), "wrong type"); 2287 mname->obj_field_put(_type_offset, type); 2288} 2289 2290int sun_dyn_MemberName::flags(oop mname) { 2291 assert(is_instance(mname), "wrong type"); 2292 return mname->int_field(_flags_offset); 2293} 2294 2295void sun_dyn_MemberName::set_flags(oop mname, int flags) { 2296 assert(is_instance(mname), "wrong type"); 2297 mname->int_field_put(_flags_offset, flags); 2298} 2299 2300oop sun_dyn_MemberName::vmtarget(oop mname) { 2301 assert(is_instance(mname), "wrong type"); 2302 return mname->obj_field(_vmtarget_offset); 2303} 2304 2305void sun_dyn_MemberName::set_vmtarget(oop mname, oop ref) { 2306 assert(is_instance(mname), "wrong type"); 2307 mname->obj_field_put(_vmtarget_offset, ref); 2308} 2309 2310int sun_dyn_MemberName::vmindex(oop mname) { 2311 assert(is_instance(mname), "wrong type"); 2312 return mname->int_field(_vmindex_offset); 2313} 2314 2315void sun_dyn_MemberName::set_vmindex(oop mname, int index) { 2316 assert(is_instance(mname), "wrong type"); 2317 mname->int_field_put(_vmindex_offset, index); 2318} 2319 2320oop java_dyn_MethodHandle::vmtarget(oop mh) { 2321 assert(is_instance(mh), "MH only"); 2322 return mh->obj_field(_vmtarget_offset); 2323} 2324 2325void java_dyn_MethodHandle::set_vmtarget(oop mh, oop ref) { 2326 assert(is_instance(mh), "MH only"); 2327 mh->obj_field_put(_vmtarget_offset, ref); 2328} 2329 2330int sun_dyn_DirectMethodHandle::vmindex(oop mh) { 2331 assert(is_instance(mh), "DMH only"); 2332 return mh->int_field(_vmindex_offset); 2333} 2334 2335void sun_dyn_DirectMethodHandle::set_vmindex(oop mh, int index) { 2336 assert(is_instance(mh), "DMH only"); 2337 mh->int_field_put(_vmindex_offset, index); 2338} 2339 2340int sun_dyn_BoundMethodHandle::vmargslot(oop mh) { 2341 assert(is_instance(mh), "BMH only"); 2342 return mh->int_field(_vmargslot_offset); 2343} 2344 2345oop sun_dyn_BoundMethodHandle::argument(oop mh) { 2346 assert(is_instance(mh), "BMH only"); 2347 return mh->obj_field(_argument_offset); 2348} 2349 2350int sun_dyn_AdapterMethodHandle::conversion(oop mh) { 2351 assert(is_instance(mh), "AMH only"); 2352 return mh->int_field(_conversion_offset); 2353} 2354 2355void sun_dyn_AdapterMethodHandle::set_conversion(oop mh, int conv) { 2356 assert(is_instance(mh), "AMH only"); 2357 mh->int_field_put(_conversion_offset, conv); 2358} 2359 2360 2361// Support for java_dyn_MethodType 2362 2363int java_dyn_MethodType::_rtype_offset; 2364int java_dyn_MethodType::_ptypes_offset; 2365int java_dyn_MethodType::_form_offset; 2366 2367void java_dyn_MethodType::compute_offsets() { 2368 klassOop k = SystemDictionary::MethodType_klass(); 2369 if (k != NULL) { 2370 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature()); 2371 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature()); 2372 compute_offset(_form_offset, k, vmSymbols::form_name(), vmSymbols::java_dyn_MethodTypeForm_signature()); 2373 } 2374} 2375 2376void java_dyn_MethodType::print_signature(oop mt, outputStream* st) { 2377 st->print("("); 2378 objArrayOop pts = ptypes(mt); 2379 for (int i = 0, limit = pts->length(); i < limit; i++) { 2380 java_lang_Class::print_signature(pts->obj_at(i), st); 2381 } 2382 st->print(")"); 2383 java_lang_Class::print_signature(rtype(mt), st); 2384} 2385 2386symbolOop java_dyn_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) { 2387 ResourceMark rm; 2388 stringStream buffer(128); 2389 print_signature(mt, &buffer); 2390 const char* sigstr = buffer.base(); 2391 int siglen = (int) buffer.size(); 2392 if (!intern_if_not_found) 2393 return SymbolTable::probe(sigstr, siglen); 2394 else 2395 return oopFactory::new_symbol(sigstr, siglen, THREAD); 2396} 2397 2398oop java_dyn_MethodType::rtype(oop mt) { 2399 assert(is_instance(mt), "must be a MethodType"); 2400 return mt->obj_field(_rtype_offset); 2401} 2402 2403objArrayOop java_dyn_MethodType::ptypes(oop mt) { 2404 assert(is_instance(mt), "must be a MethodType"); 2405 return (objArrayOop) mt->obj_field(_ptypes_offset); 2406} 2407 2408oop java_dyn_MethodType::form(oop mt) { 2409 assert(is_instance(mt), "must be a MethodType"); 2410 return mt->obj_field(_form_offset); 2411} 2412 2413oop java_dyn_MethodType::ptype(oop mt, int idx) { 2414 return ptypes(mt)->obj_at(idx); 2415} 2416 2417int java_dyn_MethodType::ptype_count(oop mt) { 2418 return ptypes(mt)->length(); 2419} 2420 2421 2422 2423// Support for java_dyn_MethodTypeForm 2424 2425int java_dyn_MethodTypeForm::_vmslots_offset; 2426int java_dyn_MethodTypeForm::_erasedType_offset; 2427 2428void java_dyn_MethodTypeForm::compute_offsets() { 2429 klassOop k = SystemDictionary::MethodTypeForm_klass(); 2430 if (k != NULL) { 2431 compute_optional_offset(_vmslots_offset, k, vmSymbols::vmslots_name(), vmSymbols::int_signature(), true); 2432 compute_optional_offset(_erasedType_offset, k, vmSymbols::erasedType_name(), vmSymbols::java_dyn_MethodType_signature(), true); 2433 } 2434} 2435 2436int java_dyn_MethodTypeForm::vmslots(oop mtform) { 2437 assert(mtform->klass() == SystemDictionary::MethodTypeForm_klass(), "MTForm only"); 2438 return mtform->int_field(_vmslots_offset); 2439} 2440 2441oop java_dyn_MethodTypeForm::erasedType(oop mtform) { 2442 assert(mtform->klass() == SystemDictionary::MethodTypeForm_klass(), "MTForm only"); 2443 return mtform->obj_field(_erasedType_offset); 2444} 2445 2446 2447// Support for java_dyn_CallSite 2448 2449int java_dyn_CallSite::_target_offset; 2450int java_dyn_CallSite::_caller_method_offset; 2451int java_dyn_CallSite::_caller_bci_offset; 2452 2453void java_dyn_CallSite::compute_offsets() { 2454 if (!EnableInvokeDynamic) return; 2455 klassOop k = SystemDictionary::CallSite_klass(); 2456 if (k != NULL) { 2457 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_dyn_MethodHandle_signature()); 2458 compute_offset(_caller_method_offset, k, vmSymbols::vmmethod_name(), vmSymbols::sun_dyn_MemberName_signature()); 2459 compute_offset(_caller_bci_offset, k, vmSymbols::vmindex_name(), vmSymbols::int_signature()); 2460 } 2461} 2462 2463oop java_dyn_CallSite::target(oop site) { 2464 return site->obj_field(_target_offset); 2465} 2466 2467void java_dyn_CallSite::set_target(oop site, oop target) { 2468 site->obj_field_put(_target_offset, target); 2469} 2470 2471oop java_dyn_CallSite::caller_method(oop site) { 2472 return site->obj_field(_caller_method_offset); 2473} 2474 2475void java_dyn_CallSite::set_caller_method(oop site, oop ref) { 2476 site->obj_field_put(_caller_method_offset, ref); 2477} 2478 2479jint java_dyn_CallSite::caller_bci(oop site) { 2480 return site->int_field(_caller_bci_offset); 2481} 2482 2483void java_dyn_CallSite::set_caller_bci(oop site, jint bci) { 2484 site->int_field_put(_caller_bci_offset, bci); 2485} 2486 2487 2488// Support for java_security_AccessControlContext 2489 2490int java_security_AccessControlContext::_context_offset = 0; 2491int java_security_AccessControlContext::_privilegedContext_offset = 0; 2492int java_security_AccessControlContext::_isPrivileged_offset = 0; 2493 2494void java_security_AccessControlContext::compute_offsets() { 2495 assert(_isPrivileged_offset == 0, "offsets should be initialized only once"); 2496 fieldDescriptor fd; 2497 instanceKlass* ik = instanceKlass::cast(SystemDictionary::AccessControlContext_klass()); 2498 2499 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) { 2500 fatal("Invalid layout of java.security.AccessControlContext"); 2501 } 2502 _context_offset = fd.offset(); 2503 2504 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) { 2505 fatal("Invalid layout of java.security.AccessControlContext"); 2506 } 2507 _privilegedContext_offset = fd.offset(); 2508 2509 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) { 2510 fatal("Invalid layout of java.security.AccessControlContext"); 2511 } 2512 _isPrivileged_offset = fd.offset(); 2513} 2514 2515 2516oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) { 2517 assert(_isPrivileged_offset != 0, "offsets should have been initialized"); 2518 // Ensure klass is initialized 2519 instanceKlass::cast(SystemDictionary::AccessControlContext_klass())->initialize(CHECK_0); 2520 // Allocate result 2521 oop result = instanceKlass::cast(SystemDictionary::AccessControlContext_klass())->allocate_instance(CHECK_0); 2522 // Fill in values 2523 result->obj_field_put(_context_offset, context()); 2524 result->obj_field_put(_privilegedContext_offset, privileged_context()); 2525 result->bool_field_put(_isPrivileged_offset, isPrivileged); 2526 return result; 2527} 2528 2529 2530// Support for java_lang_ClassLoader 2531 2532oop java_lang_ClassLoader::parent(oop loader) { 2533 assert(loader->is_oop(), "loader must be oop"); 2534 return loader->obj_field(parent_offset); 2535} 2536 2537 2538bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 2539 // Fix for 4474172; see evaluation for more details 2540 loader = non_reflection_class_loader(loader); 2541 2542 oop cl = SystemDictionary::java_system_loader(); 2543 while(cl != NULL) { 2544 if (cl == loader) return true; 2545 cl = parent(cl); 2546 } 2547 return false; 2548} 2549 2550oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) { 2551 if (loader != NULL) { 2552 // See whether this is one of the class loaders associated with 2553 // the generated bytecodes for reflection, and if so, "magically" 2554 // delegate to its parent to prevent class loading from occurring 2555 // in places where applications using reflection didn't expect it. 2556 klassOop delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass(); 2557 // This might be null in non-1.4 JDKs 2558 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) { 2559 return parent(loader); 2560 } 2561 } 2562 return loader; 2563} 2564 2565 2566// Support for java_lang_System 2567 2568void java_lang_System::compute_offsets() { 2569 assert(offset_of_static_fields == 0, "offsets should be initialized only once"); 2570 2571 instanceKlass* ik = instanceKlass::cast(SystemDictionary::System_klass()); 2572 offset_of_static_fields = ik->offset_of_static_fields(); 2573} 2574 2575int java_lang_System::in_offset_in_bytes() { 2576 return (offset_of_static_fields + static_in_offset); 2577} 2578 2579 2580int java_lang_System::out_offset_in_bytes() { 2581 return (offset_of_static_fields + static_out_offset); 2582} 2583 2584 2585int java_lang_System::err_offset_in_bytes() { 2586 return (offset_of_static_fields + static_err_offset); 2587} 2588 2589 2590 2591int java_lang_String::value_offset; 2592int java_lang_String::offset_offset; 2593int java_lang_String::count_offset; 2594int java_lang_String::hash_offset; 2595int java_lang_Class::klass_offset; 2596int java_lang_Class::array_klass_offset; 2597int java_lang_Class::resolved_constructor_offset; 2598int java_lang_Class::number_of_fake_oop_fields; 2599int java_lang_Throwable::backtrace_offset; 2600int java_lang_Throwable::detailMessage_offset; 2601int java_lang_Throwable::cause_offset; 2602int java_lang_Throwable::stackTrace_offset; 2603int java_lang_reflect_AccessibleObject::override_offset; 2604int java_lang_reflect_Method::clazz_offset; 2605int java_lang_reflect_Method::name_offset; 2606int java_lang_reflect_Method::returnType_offset; 2607int java_lang_reflect_Method::parameterTypes_offset; 2608int java_lang_reflect_Method::exceptionTypes_offset; 2609int java_lang_reflect_Method::slot_offset; 2610int java_lang_reflect_Method::modifiers_offset; 2611int java_lang_reflect_Method::signature_offset; 2612int java_lang_reflect_Method::annotations_offset; 2613int java_lang_reflect_Method::parameter_annotations_offset; 2614int java_lang_reflect_Method::annotation_default_offset; 2615int java_lang_reflect_Constructor::clazz_offset; 2616int java_lang_reflect_Constructor::parameterTypes_offset; 2617int java_lang_reflect_Constructor::exceptionTypes_offset; 2618int java_lang_reflect_Constructor::slot_offset; 2619int java_lang_reflect_Constructor::modifiers_offset; 2620int java_lang_reflect_Constructor::signature_offset; 2621int java_lang_reflect_Constructor::annotations_offset; 2622int java_lang_reflect_Constructor::parameter_annotations_offset; 2623int java_lang_reflect_Field::clazz_offset; 2624int java_lang_reflect_Field::name_offset; 2625int java_lang_reflect_Field::type_offset; 2626int java_lang_reflect_Field::slot_offset; 2627int java_lang_reflect_Field::modifiers_offset; 2628int java_lang_reflect_Field::signature_offset; 2629int java_lang_reflect_Field::annotations_offset; 2630int java_lang_boxing_object::value_offset; 2631int java_lang_boxing_object::long_value_offset; 2632int java_lang_ref_Reference::referent_offset; 2633int java_lang_ref_Reference::queue_offset; 2634int java_lang_ref_Reference::next_offset; 2635int java_lang_ref_Reference::discovered_offset; 2636int java_lang_ref_Reference::static_lock_offset; 2637int java_lang_ref_Reference::static_pending_offset; 2638int java_lang_ref_Reference::number_of_fake_oop_fields; 2639int java_lang_ref_SoftReference::timestamp_offset; 2640int java_lang_ref_SoftReference::static_clock_offset; 2641int java_lang_ClassLoader::parent_offset; 2642int java_lang_System::offset_of_static_fields; 2643int java_lang_System::static_in_offset; 2644int java_lang_System::static_out_offset; 2645int java_lang_System::static_err_offset; 2646int java_lang_StackTraceElement::declaringClass_offset; 2647int java_lang_StackTraceElement::methodName_offset; 2648int java_lang_StackTraceElement::fileName_offset; 2649int java_lang_StackTraceElement::lineNumber_offset; 2650int java_lang_AssertionStatusDirectives::classes_offset; 2651int java_lang_AssertionStatusDirectives::classEnabled_offset; 2652int java_lang_AssertionStatusDirectives::packages_offset; 2653int java_lang_AssertionStatusDirectives::packageEnabled_offset; 2654int java_lang_AssertionStatusDirectives::deflt_offset; 2655int java_nio_Buffer::_limit_offset; 2656int sun_misc_AtomicLongCSImpl::_value_offset; 2657int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0; 2658int sun_reflect_ConstantPool::_cp_oop_offset; 2659int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset; 2660 2661 2662// Support for java_lang_StackTraceElement 2663 2664void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 2665 element->obj_field_put(fileName_offset, value); 2666} 2667 2668void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 2669 element->obj_field_put(declaringClass_offset, value); 2670} 2671 2672void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 2673 element->obj_field_put(methodName_offset, value); 2674} 2675 2676void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 2677 element->int_field_put(lineNumber_offset, value); 2678} 2679 2680 2681// Support for java Assertions - java_lang_AssertionStatusDirectives. 2682 2683void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 2684 o->obj_field_put(classes_offset, val); 2685} 2686 2687void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 2688 o->obj_field_put(classEnabled_offset, val); 2689} 2690 2691void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 2692 o->obj_field_put(packages_offset, val); 2693} 2694 2695void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 2696 o->obj_field_put(packageEnabled_offset, val); 2697} 2698 2699void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 2700 o->bool_field_put(deflt_offset, val); 2701} 2702 2703 2704// Support for intrinsification of java.nio.Buffer.checkIndex 2705int java_nio_Buffer::limit_offset() { 2706 return _limit_offset; 2707} 2708 2709 2710void java_nio_Buffer::compute_offsets() { 2711 klassOop k = SystemDictionary::java_nio_Buffer_klass(); 2712 assert(k != NULL, "must be loaded in 1.4+"); 2713 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature()); 2714} 2715 2716// Support for intrinsification of sun.misc.AtomicLongCSImpl.attemptUpdate 2717int sun_misc_AtomicLongCSImpl::value_offset() { 2718 assert(SystemDictionary::sun_misc_AtomicLongCSImpl_klass() != NULL, "can't call this"); 2719 return _value_offset; 2720} 2721 2722 2723void sun_misc_AtomicLongCSImpl::compute_offsets() { 2724 klassOop k = SystemDictionary::sun_misc_AtomicLongCSImpl_klass(); 2725 // If this class is not present, its value field offset won't be referenced. 2726 if (k != NULL) { 2727 compute_offset(_value_offset, k, vmSymbols::value_name(), vmSymbols::long_signature()); 2728 } 2729} 2730 2731void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) { 2732 if (_owner_offset != 0) return; 2733 2734 assert(JDK_Version::is_gte_jdk16x_version(), "Must be JDK 1.6 or later"); 2735 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK); 2736 klassOop k = SystemDictionary::abstract_ownable_synchronizer_klass(); 2737 compute_offset(_owner_offset, k, 2738 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature()); 2739} 2740 2741oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 2742 assert(_owner_offset != 0, "Must be initialized"); 2743 return obj->obj_field(_owner_offset); 2744} 2745 2746// Compute hard-coded offsets 2747// Invoked before SystemDictionary::initialize, so pre-loaded classes 2748// are not available to determine the offset_of_static_fields. 2749void JavaClasses::compute_hard_coded_offsets() { 2750 const int x = heapOopSize; 2751 const int header = instanceOopDesc::base_offset_in_bytes(); 2752 2753 // Do the String Class 2754 java_lang_String::value_offset = java_lang_String::hc_value_offset * x + header; 2755 java_lang_String::offset_offset = java_lang_String::hc_offset_offset * x + header; 2756 java_lang_String::count_offset = java_lang_String::offset_offset + sizeof (jint); 2757 java_lang_String::hash_offset = java_lang_String::count_offset + sizeof (jint); 2758 2759 // Do the Class Class 2760 java_lang_Class::klass_offset = java_lang_Class::hc_klass_offset * x + header; 2761 java_lang_Class::array_klass_offset = java_lang_Class::hc_array_klass_offset * x + header; 2762 java_lang_Class::resolved_constructor_offset = java_lang_Class::hc_resolved_constructor_offset * x + header; 2763 2764 // This is NOT an offset 2765 java_lang_Class::number_of_fake_oop_fields = java_lang_Class::hc_number_of_fake_oop_fields; 2766 2767 // Throwable Class 2768 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header; 2769 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header; 2770 java_lang_Throwable::cause_offset = java_lang_Throwable::hc_cause_offset * x + header; 2771 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header; 2772 2773 // java_lang_boxing_object 2774 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header; 2775 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong); 2776 2777 // java_lang_ref_Reference: 2778 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header; 2779 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header; 2780 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header; 2781 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header; 2782 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x; 2783 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x; 2784 // Artificial fields for java_lang_ref_Reference 2785 // The first field is for the discovered field added in 1.4 2786 java_lang_ref_Reference::number_of_fake_oop_fields = 1; 2787 2788 // java_lang_ref_SoftReference Class 2789 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong); 2790 // Don't multiply static fields because they are always in wordSize units 2791 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x; 2792 2793 // java_lang_ClassLoader 2794 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header; 2795 2796 // java_lang_System 2797 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x; 2798 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x; 2799 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x; 2800 2801 // java_lang_StackTraceElement 2802 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header; 2803 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header; 2804 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header; 2805 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header; 2806 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header; 2807 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header; 2808 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header; 2809 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header; 2810 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header; 2811 2812} 2813 2814 2815// Compute non-hard-coded field offsets of all the classes in this file 2816void JavaClasses::compute_offsets() { 2817 2818 java_lang_Class::compute_offsets(); 2819 java_lang_System::compute_offsets(); 2820 java_lang_Thread::compute_offsets(); 2821 java_lang_ThreadGroup::compute_offsets(); 2822 if (EnableMethodHandles) { 2823 java_dyn_MethodHandle::compute_offsets(); 2824 sun_dyn_MemberName::compute_offsets(); 2825 sun_dyn_DirectMethodHandle::compute_offsets(); 2826 sun_dyn_BoundMethodHandle::compute_offsets(); 2827 sun_dyn_AdapterMethodHandle::compute_offsets(); 2828 java_dyn_MethodType::compute_offsets(); 2829 java_dyn_MethodTypeForm::compute_offsets(); 2830 } 2831 if (EnableInvokeDynamic) { 2832 java_dyn_CallSite::compute_offsets(); 2833 } 2834 java_security_AccessControlContext::compute_offsets(); 2835 // Initialize reflection classes. The layouts of these classes 2836 // changed with the new reflection implementation in JDK 1.4, and 2837 // since the Universe doesn't know what JDK version it is until this 2838 // point we defer computation of these offsets until now. 2839 java_lang_reflect_AccessibleObject::compute_offsets(); 2840 java_lang_reflect_Method::compute_offsets(); 2841 java_lang_reflect_Constructor::compute_offsets(); 2842 java_lang_reflect_Field::compute_offsets(); 2843 if (JDK_Version::is_gte_jdk14x_version()) { 2844 java_nio_Buffer::compute_offsets(); 2845 } 2846 if (JDK_Version::is_gte_jdk15x_version()) { 2847 sun_reflect_ConstantPool::compute_offsets(); 2848 sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets(); 2849 } 2850 sun_misc_AtomicLongCSImpl::compute_offsets(); 2851 2852 // generated interpreter code wants to know about the offsets we just computed: 2853 AbstractAssembler::update_delayed_values(); 2854} 2855 2856#ifndef PRODUCT 2857 2858// These functions exist to assert the validity of hard-coded field offsets to guard 2859// against changes in the class files 2860 2861bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 2862 EXCEPTION_MARK; 2863 fieldDescriptor fd; 2864 symbolHandle klass_sym = oopFactory::new_symbol_handle(klass_name, CATCH); 2865 klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 2866 instanceKlassHandle h_klass (THREAD, k); 2867 //instanceKlassHandle h_klass(klass); 2868 symbolHandle f_name = oopFactory::new_symbol_handle(field_name, CATCH); 2869 symbolHandle f_sig = oopFactory::new_symbol_handle(field_sig, CATCH); 2870 if (!h_klass->find_local_field(f_name(), f_sig(), &fd)) { 2871 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 2872 return false; 2873 } 2874 if (fd.is_static()) { 2875 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 2876 return false; 2877 } 2878 if (fd.offset() == hardcoded_offset ) { 2879 return true; 2880 } else { 2881 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.", 2882 klass_name, field_name, hardcoded_offset, fd.offset()); 2883 return false; 2884 } 2885} 2886 2887 2888bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 2889 EXCEPTION_MARK; 2890 fieldDescriptor fd; 2891 symbolHandle klass_sym = oopFactory::new_symbol_handle(klass_name, CATCH); 2892 klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 2893 instanceKlassHandle h_klass (THREAD, k); 2894 symbolHandle f_name = oopFactory::new_symbol_handle(field_name, CATCH); 2895 symbolHandle f_sig = oopFactory::new_symbol_handle(field_sig, CATCH); 2896 if (!h_klass->find_local_field(f_name(), f_sig(), &fd)) { 2897 tty->print_cr("Static field %s.%s not found", klass_name, field_name); 2898 return false; 2899 } 2900 if (!fd.is_static()) { 2901 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name); 2902 return false; 2903 } 2904 if (fd.offset() == hardcoded_offset + h_klass->offset_of_static_fields()) { 2905 return true; 2906 } else { 2907 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()); 2908 return false; 2909 } 2910} 2911 2912 2913bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) { 2914 EXCEPTION_MARK; 2915 fieldDescriptor fd; 2916 symbolHandle klass_sym = oopFactory::new_symbol_handle(klass_name, CATCH); 2917 klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 2918 instanceKlassHandle h_klass (THREAD, k); 2919 symbolHandle f_name = oopFactory::new_symbol_handle(field_name, CATCH); 2920 symbolHandle f_sig = oopFactory::new_symbol_handle(field_sig, CATCH); 2921 if (!h_klass->find_local_field(f_name(), f_sig(), &fd)) { 2922 tty->print_cr("Static field %s.%s not found", klass_name, field_name); 2923 return false; 2924 } 2925 if (!fd.is_static() || !fd.has_initial_value()) { 2926 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name); 2927 return false; 2928 } 2929 if (!fd.initial_value_tag().is_int()) { 2930 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name); 2931 return false; 2932 } 2933 jint field_value = fd.int_initial_value(); 2934 if (field_value == hardcoded_constant) { 2935 return true; 2936 } else { 2937 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); 2938 return false; 2939 } 2940} 2941 2942 2943// Check the hard-coded field offsets of all the classes in this file 2944 2945void JavaClasses::check_offsets() { 2946 bool valid = true; 2947 2948#define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 2949 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig) 2950 2951#define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 2952 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig) 2953 2954#define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 2955 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig) 2956 2957#define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \ 2958 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig) 2959 2960 // java.lang.String 2961 2962 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C"); 2963 CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I"); 2964 CHECK_OFFSET("java/lang/String", java_lang_String, count, "I"); 2965 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I"); 2966 2967 // java.lang.Class 2968 2969 // Fake fields 2970 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked 2971 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked 2972 // CHECK_OFFSET("java/lang/Class", java_lang_Class, resolved_constructor); // %%% this needs to be checked 2973 2974 // java.lang.Throwable 2975 2976 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;"); 2977 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;"); 2978 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;"); 2979 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;"); 2980 2981 // Boxed primitive objects (java_lang_boxing_object) 2982 2983 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 2984 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 2985 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 2986 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 2987 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 2988 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 2989 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 2990 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 2991 2992 // java.lang.ClassLoader 2993 2994 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;"); 2995 2996 // java.lang.System 2997 2998 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;"); 2999 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;"); 3000 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;"); 3001 3002 // java.lang.StackTraceElement 3003 3004 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;"); 3005 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;"); 3006 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;"); 3007 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I"); 3008 3009 // java.lang.ref.Reference 3010 3011 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;"); 3012 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;"); 3013 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;"); 3014 // Fake field 3015 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;"); 3016 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;"); 3017 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;"); 3018 3019 // java.lang.ref.SoftReference 3020 3021 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J"); 3022 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J"); 3023 3024 // java.lang.AssertionStatusDirectives 3025 // 3026 // The CheckAssertionStatusDirectives boolean can be removed from here and 3027 // globals.hpp after the AssertionStatusDirectives class has been integrated 3028 // into merlin "for some time." Without it, the vm will fail with early 3029 // merlin builds. 3030 3031 if (CheckAssertionStatusDirectives && JDK_Version::is_gte_jdk14x_version()) { 3032 const char* nm = "java/lang/AssertionStatusDirectives"; 3033 const char* sig = "[Ljava/lang/String;"; 3034 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig); 3035 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z"); 3036 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig); 3037 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z"); 3038 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z"); 3039 } 3040 3041 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed"); 3042} 3043 3044#endif // PRODUCT 3045 3046void javaClasses_init() { 3047 JavaClasses::compute_offsets(); 3048 JavaClasses::check_offsets(); 3049 FilteredFieldsMap::initialize(); // must be done after computing offsets. 3050} 3051