1 /* 2 * Copyright (c) 1997, 2011, 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 "precompiled.hpp" 26 #include "classfile/javaClasses.hpp" 27 #include "classfile/symbolTable.hpp" 28 #include "classfile/vmSymbols.hpp" 29 #include "code/debugInfo.hpp" 30 #include "code/pcDesc.hpp" 31 #include "interpreter/interpreter.hpp" 32 #include "memory/oopFactory.hpp" 33 #include "memory/resourceArea.hpp" 34 #include "memory/universe.inline.hpp" 35 #include "oops/instanceKlass.hpp" 36 #include "oops/instanceMirrorKlass.hpp" 37 #include "oops/klass.hpp" 38 #include "oops/klassOop.hpp" 39 #include "oops/methodOop.hpp" 40 #include "oops/symbol.hpp" 41 #include "oops/typeArrayOop.hpp" 42 #include "runtime/fieldDescriptor.hpp" 43 #include "runtime/handles.inline.hpp" 44 #include "runtime/interfaceSupport.hpp" 45 #include "runtime/java.hpp" 46 #include "runtime/javaCalls.hpp" 47 #include "runtime/safepoint.hpp" 48 #include "runtime/vframe.hpp" 49 #include "utilities/preserveException.hpp" 50 #ifdef TARGET_OS_FAMILY_linux 51 # include "thread_linux.inline.hpp" 52 #endif 53 #ifdef TARGET_OS_FAMILY_solaris 54 # include "thread_solaris.inline.hpp" 55 #endif 56 #ifdef TARGET_OS_FAMILY_windows 57 # include "thread_windows.inline.hpp" 58 #endif 59 60 static bool find_field(instanceKlass* ik, 61 Symbol* name_symbol, Symbol* signature_symbol, 62 fieldDescriptor* fd, 63 bool allow_super = false) { 64 if (allow_super) 65 return ik->find_field(name_symbol, signature_symbol, fd) != NULL; 66 else 67 return ik->find_local_field(name_symbol, signature_symbol, fd); 68 } 69 70 // Helpful routine for computing field offsets at run time rather than hardcoding them 71 static void 72 compute_offset(int &dest_offset, 73 klassOop klass_oop, Symbol* name_symbol, Symbol* signature_symbol, 74 bool allow_super = false) { 75 fieldDescriptor fd; 76 instanceKlass* ik = instanceKlass::cast(klass_oop); 77 if (!find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) { 78 ResourceMark rm; 79 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string()); 80 fatal("Invalid layout of preloaded class"); 81 } 82 dest_offset = fd.offset(); 83 } 84 85 // Same as above but for "optional" offsets that might not be present in certain JDK versions 86 static void 87 compute_optional_offset(int& dest_offset, 88 klassOop klass_oop, Symbol* name_symbol, Symbol* signature_symbol, 89 bool allow_super = false) { 90 fieldDescriptor fd; 91 instanceKlass* ik = instanceKlass::cast(klass_oop); 92 if (find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) { 93 dest_offset = fd.offset(); 94 } 95 } 96 97 98 Handle java_lang_String::basic_create(int length, bool tenured, TRAPS) { 99 // Create the String object first, so there's a chance that the String 100 // and the char array it points to end up in the same cache line. 101 oop obj; 102 if (tenured) { 103 obj = instanceKlass::cast(SystemDictionary::String_klass())->allocate_permanent_instance(CHECK_NH); 104 } else { 105 obj = instanceKlass::cast(SystemDictionary::String_klass())->allocate_instance(CHECK_NH); 106 } 107 108 // Create the char array. The String object must be handlized here 109 // because GC can happen as a result of the allocation attempt. 110 Handle h_obj(THREAD, obj); 111 typeArrayOop buffer; 112 if (tenured) { 113 buffer = oopFactory::new_permanent_charArray(length, CHECK_NH); 114 } else { 115 buffer = oopFactory::new_charArray(length, CHECK_NH); 116 } 117 118 // Point the String at the char array 119 obj = h_obj(); 120 set_value(obj, buffer); 121 // No need to zero the offset, allocation zero'ed the entire String object 122 assert(offset(obj) == 0, "initial String offset should be zero"); 123 //set_offset(obj, 0); 124 set_count(obj, length); 125 126 return h_obj; 127 } 128 129 Handle java_lang_String::basic_create_from_unicode(jchar* unicode, int length, bool tenured, TRAPS) { 130 Handle h_obj = basic_create(length, tenured, CHECK_NH); 131 typeArrayOop buffer = value(h_obj()); 132 for (int index = 0; index < length; index++) { 133 buffer->char_at_put(index, unicode[index]); 134 } 135 return h_obj; 136 } 137 138 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) { 139 return basic_create_from_unicode(unicode, length, false, CHECK_NH); 140 } 141 142 Handle java_lang_String::create_tenured_from_unicode(jchar* unicode, int length, TRAPS) { 143 return basic_create_from_unicode(unicode, length, JavaObjectsInPerm, CHECK_NH); 144 } 145 146 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) { 147 Handle h_obj = basic_create_from_unicode(unicode, length, false, CHECK_0); 148 return h_obj(); 149 } 150 151 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) { 152 if (utf8_str == NULL) { 153 return Handle(); 154 } 155 int length = UTF8::unicode_length(utf8_str); 156 Handle h_obj = basic_create(length, false, CHECK_NH); 157 if (length > 0) { 158 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 159 } 160 return h_obj; 161 } 162 163 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) { 164 Handle h_obj = create_from_str(utf8_str, CHECK_0); 165 return h_obj(); 166 } 167 168 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) { 169 int length = UTF8::unicode_length((char*)symbol->bytes(), symbol->utf8_length()); 170 Handle h_obj = basic_create(length, false, CHECK_NH); 171 if (length > 0) { 172 UTF8::convert_to_unicode((char*)symbol->bytes(), value(h_obj())->char_at_addr(0), length); 173 } 174 return h_obj; 175 } 176 177 // Converts a C string to a Java String based on current encoding 178 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) { 179 assert(str != NULL, "bad arguments"); 180 181 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *); 182 static to_java_string_fn_t _to_java_string_fn = NULL; 183 184 if (_to_java_string_fn == NULL) { 185 void *lib_handle = os::native_java_library(); 186 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform")); 187 if (_to_java_string_fn == NULL) { 188 fatal("NewStringPlatform missing"); 189 } 190 } 191 192 jstring js = NULL; 193 { JavaThread* thread = (JavaThread*)THREAD; 194 assert(thread->is_Java_thread(), "must be java thread"); 195 HandleMark hm(thread); 196 ThreadToNativeFromVM ttn(thread); 197 js = (_to_java_string_fn)(thread->jni_environment(), str); 198 } 199 return Handle(THREAD, JNIHandles::resolve(js)); 200 } 201 202 // Converts a Java String to a native C string that can be used for 203 // native OS calls. 204 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) { 205 206 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*); 207 static to_platform_string_fn_t _to_platform_string_fn = NULL; 208 209 if (_to_platform_string_fn == NULL) { 210 void *lib_handle = os::native_java_library(); 211 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars")); 212 if (_to_platform_string_fn == NULL) { 213 fatal("GetStringPlatformChars missing"); 214 } 215 } 216 217 char *native_platform_string; 218 { JavaThread* thread = (JavaThread*)THREAD; 219 assert(thread->is_Java_thread(), "must be java thread"); 220 JNIEnv *env = thread->jni_environment(); 221 jstring js = (jstring) JNIHandles::make_local(env, java_string()); 222 bool is_copy; 223 HandleMark hm(thread); 224 ThreadToNativeFromVM ttn(thread); 225 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy); 226 assert(is_copy == JNI_TRUE, "is_copy value changed"); 227 JNIHandles::destroy_local(js); 228 } 229 return native_platform_string; 230 } 231 232 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) { 233 oop obj = java_string(); 234 // Typical usage is to convert all '/' to '.' in string. 235 typeArrayOop value = java_lang_String::value(obj); 236 int offset = java_lang_String::offset(obj); 237 int length = java_lang_String::length(obj); 238 239 // First check if any from_char exist 240 int index; // Declared outside, used later 241 for (index = 0; index < length; index++) { 242 if (value->char_at(index + offset) == from_char) { 243 break; 244 } 245 } 246 if (index == length) { 247 // No from_char, so do not copy. 248 return java_string; 249 } 250 251 // Create new UNICODE buffer. Must handlize value because GC 252 // may happen during String and char array creation. 253 typeArrayHandle h_value(THREAD, value); 254 Handle string = basic_create(length, false, CHECK_NH); 255 256 typeArrayOop from_buffer = h_value(); 257 typeArrayOop to_buffer = java_lang_String::value(string()); 258 259 // Copy contents 260 for (index = 0; index < length; index++) { 261 jchar c = from_buffer->char_at(index + offset); 262 if (c == from_char) { 263 c = to_char; 264 } 265 to_buffer->char_at_put(index, c); 266 } 267 return string; 268 } 269 270 jchar* java_lang_String::as_unicode_string(oop java_string, int& length) { 271 typeArrayOop value = java_lang_String::value(java_string); 272 int offset = java_lang_String::offset(java_string); 273 length = java_lang_String::length(java_string); 274 275 jchar* result = NEW_RESOURCE_ARRAY(jchar, length); 276 for (int index = 0; index < length; index++) { 277 result[index] = value->char_at(index + offset); 278 } 279 return result; 280 } 281 282 unsigned int java_lang_String::hash_string(oop java_string) { 283 typeArrayOop value = java_lang_String::value(java_string); 284 int offset = java_lang_String::offset(java_string); 285 int length = java_lang_String::length(java_string); 286 287 if (length == 0) return 0; 288 return hash_string(value->char_at_addr(offset), length); 289 } 290 291 Symbol* java_lang_String::as_symbol(Handle java_string, TRAPS) { 292 oop obj = java_string(); 293 typeArrayOop value = java_lang_String::value(obj); 294 int offset = java_lang_String::offset(obj); 295 int length = java_lang_String::length(obj); 296 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset); 297 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD); 298 return sym; 299 } 300 301 Symbol* java_lang_String::as_symbol_or_null(oop java_string) { 302 typeArrayOop value = java_lang_String::value(java_string); 303 int offset = java_lang_String::offset(java_string); 304 int length = java_lang_String::length(java_string); 305 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset); 306 return SymbolTable::probe_unicode(base, length); 307 } 308 309 310 int java_lang_String::utf8_length(oop java_string) { 311 typeArrayOop value = java_lang_String::value(java_string); 312 int offset = java_lang_String::offset(java_string); 313 int length = java_lang_String::length(java_string); 314 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset); 315 return UNICODE::utf8_length(position, length); 316 } 317 318 char* java_lang_String::as_utf8_string(oop java_string) { 319 typeArrayOop value = java_lang_String::value(java_string); 320 int offset = java_lang_String::offset(java_string); 321 int length = java_lang_String::length(java_string); 322 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset); 323 return UNICODE::as_utf8(position, length); 324 } 325 326 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) { 327 typeArrayOop value = java_lang_String::value(java_string); 328 int offset = java_lang_String::offset(java_string); 329 int length = java_lang_String::length(java_string); 330 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset); 331 return UNICODE::as_utf8(position, length, buf, buflen); 332 } 333 334 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) { 335 typeArrayOop value = java_lang_String::value(java_string); 336 int offset = java_lang_String::offset(java_string); 337 int length = java_lang_String::length(java_string); 338 assert(start + len <= length, "just checking"); 339 jchar* position = value->char_at_addr(offset + start); 340 return UNICODE::as_utf8(position, len); 341 } 342 343 bool java_lang_String::equals(oop java_string, jchar* chars, int len) { 344 assert(SharedSkipVerify || 345 java_string->klass() == SystemDictionary::String_klass(), 346 "must be java_string"); 347 typeArrayOop value = java_lang_String::value(java_string); 348 int offset = java_lang_String::offset(java_string); 349 int length = java_lang_String::length(java_string); 350 if (length != len) { 351 return false; 352 } 353 for (int i = 0; i < len; i++) { 354 if (value->char_at(i + offset) != chars[i]) { 355 return false; 356 } 357 } 358 return true; 359 } 360 361 void java_lang_String::print(Handle java_string, outputStream* st) { 362 oop obj = java_string(); 363 assert(obj->klass() == SystemDictionary::String_klass(), "must be java_string"); 364 typeArrayOop value = java_lang_String::value(obj); 365 int offset = java_lang_String::offset(obj); 366 int length = java_lang_String::length(obj); 367 368 int end = MIN2(length, 100); 369 if (value == NULL) { 370 // This can happen if, e.g., printing a String 371 // object before its initializer has been called 372 st->print_cr("NULL"); 373 } else { 374 st->print("\""); 375 for (int index = 0; index < length; index++) { 376 st->print("%c", value->char_at(index + offset)); 377 } 378 st->print("\""); 379 } 380 } 381 382 static void initialize_static_field(fieldDescriptor* fd, TRAPS) { 383 Handle mirror (THREAD, fd->field_holder()->java_mirror()); 384 assert(mirror.not_null() && fd->is_static(), "just checking"); 385 if (fd->has_initial_value()) { 386 BasicType t = fd->field_type(); 387 switch (t) { 388 case T_BYTE: 389 mirror()->byte_field_put(fd->offset(), fd->int_initial_value()); 390 break; 391 case T_BOOLEAN: 392 mirror()->bool_field_put(fd->offset(), fd->int_initial_value()); 393 break; 394 case T_CHAR: 395 mirror()->char_field_put(fd->offset(), fd->int_initial_value()); 396 break; 397 case T_SHORT: 398 mirror()->short_field_put(fd->offset(), fd->int_initial_value()); 399 break; 400 case T_INT: 401 mirror()->int_field_put(fd->offset(), fd->int_initial_value()); 402 break; 403 case T_FLOAT: 404 mirror()->float_field_put(fd->offset(), fd->float_initial_value()); 405 break; 406 case T_DOUBLE: 407 mirror()->double_field_put(fd->offset(), fd->double_initial_value()); 408 break; 409 case T_LONG: 410 mirror()->long_field_put(fd->offset(), fd->long_initial_value()); 411 break; 412 case T_OBJECT: 413 { 414 #ifdef ASSERT 415 TempNewSymbol sym = SymbolTable::new_symbol("Ljava/lang/String;", CHECK); 416 assert(fd->signature() == sym, "just checking"); 417 #endif 418 oop string = fd->string_initial_value(CHECK); 419 mirror()->obj_field_put(fd->offset(), string); 420 } 421 break; 422 default: 423 THROW_MSG(vmSymbols::java_lang_ClassFormatError(), 424 "Illegal ConstantValue attribute in class file"); 425 } 426 } 427 } 428 429 430 // During bootstrap, java.lang.Class wasn't loaded so static field 431 // offsets were computed without the size added it. Go back and 432 // update all the static field offsets to included the size. 433 static void fixup_static_field(fieldDescriptor* fd, TRAPS) { 434 if (fd->is_static()) { 435 int real_offset = fd->offset() + instanceMirrorKlass::offset_of_static_fields(); 436 typeArrayOop fields = instanceKlass::cast(fd->field_holder())->fields(); 437 fields->short_at_put(fd->index() + instanceKlass::low_offset, extract_low_short_from_int(real_offset)); 438 fields->short_at_put(fd->index() + instanceKlass::high_offset, extract_high_short_from_int(real_offset)); 439 } 440 } 441 442 void java_lang_Class::fixup_mirror(KlassHandle k, TRAPS) { 443 assert(instanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already"); 444 445 if (k->oop_is_instance()) { 446 // Fixup the offsets 447 instanceKlass::cast(k())->do_local_static_fields(&fixup_static_field, CHECK); 448 } 449 create_mirror(k, CHECK); 450 } 451 452 oop java_lang_Class::create_mirror(KlassHandle k, TRAPS) { 453 assert(k->java_mirror() == NULL, "should only assign mirror once"); 454 // Use this moment of initialization to cache modifier_flags also, 455 // to support Class.getModifiers(). Instance classes recalculate 456 // the cached flags after the class file is parsed, but before the 457 // class is put into the system dictionary. 458 int computed_modifiers = k->compute_modifier_flags(CHECK_0); 459 k->set_modifier_flags(computed_modifiers); 460 if (SystemDictionary::Class_klass_loaded() && (k->oop_is_instance() || k->oop_is_javaArray())) { 461 // Allocate mirror (java.lang.Class instance) 462 Handle mirror = instanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK_0); 463 // Setup indirections 464 mirror->obj_field_put(klass_offset, k()); 465 k->set_java_mirror(mirror()); 466 467 instanceMirrorKlass* mk = instanceMirrorKlass::cast(mirror->klass()); 468 java_lang_Class::set_oop_size(mirror(), mk->instance_size(k)); 469 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror())); 470 471 // It might also have a component mirror. This mirror must already exist. 472 if (k->oop_is_javaArray()) { 473 Handle comp_mirror; 474 if (k->oop_is_typeArray()) { 475 BasicType type = typeArrayKlass::cast(k->as_klassOop())->element_type(); 476 comp_mirror = Universe::java_mirror(type); 477 assert(comp_mirror.not_null(), "must have primitive mirror"); 478 } else if (k->oop_is_objArray()) { 479 klassOop element_klass = objArrayKlass::cast(k->as_klassOop())->element_klass(); 480 if (element_klass != NULL 481 && (Klass::cast(element_klass)->oop_is_instance() || 482 Klass::cast(element_klass)->oop_is_javaArray())) { 483 comp_mirror = Klass::cast(element_klass)->java_mirror(); 484 assert(comp_mirror.not_null(), "must have element mirror"); 485 } 486 // else some object array internal to the VM, like systemObjArrayKlassObj 487 } 488 if (comp_mirror.not_null()) { 489 // Two-way link between the array klass and its component mirror: 490 arrayKlass::cast(k->as_klassOop())->set_component_mirror(comp_mirror()); 491 set_array_klass(comp_mirror(), k->as_klassOop()); 492 } 493 } else if (k->oop_is_instance()) { 494 // Initialize static fields 495 instanceKlass::cast(k())->do_local_static_fields(&initialize_static_field, CHECK_NULL); 496 } 497 return mirror(); 498 } else { 499 return NULL; 500 } 501 } 502 503 504 505 int java_lang_Class::oop_size(oop java_class) { 506 assert(oop_size_offset != 0, "must be set"); 507 return java_class->int_field(oop_size_offset); 508 } 509 void java_lang_Class::set_oop_size(oop java_class, int size) { 510 assert(oop_size_offset != 0, "must be set"); 511 java_class->int_field_put(oop_size_offset, size); 512 } 513 int java_lang_Class::static_oop_field_count(oop java_class) { 514 assert(static_oop_field_count_offset != 0, "must be set"); 515 return java_class->int_field(static_oop_field_count_offset); 516 } 517 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) { 518 assert(static_oop_field_count_offset != 0, "must be set"); 519 java_class->int_field_put(static_oop_field_count_offset, size); 520 } 521 522 523 524 525 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) { 526 // This should be improved by adding a field at the Java level or by 527 // introducing a new VM klass (see comment in ClassFileParser) 528 oop java_class = instanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance((oop)NULL, CHECK_0); 529 if (type != T_VOID) { 530 klassOop aklass = Universe::typeArrayKlassObj(type); 531 assert(aklass != NULL, "correct bootstrap"); 532 set_array_klass(java_class, aklass); 533 } 534 instanceMirrorKlass* mk = instanceMirrorKlass::cast(SystemDictionary::Class_klass()); 535 java_lang_Class::set_oop_size(java_class, mk->instance_size(oop(NULL))); 536 java_lang_Class::set_static_oop_field_count(java_class, 0); 537 return java_class; 538 } 539 540 541 klassOop java_lang_Class::as_klassOop(oop java_class) { 542 //%note memory_2 543 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 544 klassOop k = klassOop(java_class->obj_field(klass_offset)); 545 assert(k == NULL || k->is_klass(), "type check"); 546 return k; 547 } 548 549 550 void java_lang_Class::print_signature(oop java_class, outputStream* st) { 551 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 552 Symbol* name = NULL; 553 bool is_instance = false; 554 if (is_primitive(java_class)) { 555 name = vmSymbols::type_signature(primitive_type(java_class)); 556 } else { 557 klassOop k = as_klassOop(java_class); 558 is_instance = Klass::cast(k)->oop_is_instance(); 559 name = Klass::cast(k)->name(); 560 } 561 if (name == NULL) { 562 st->print("<null>"); 563 return; 564 } 565 if (is_instance) st->print("L"); 566 st->write((char*) name->base(), (int) name->utf8_length()); 567 if (is_instance) st->print(";"); 568 } 569 570 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) { 571 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 572 Symbol* name; 573 if (is_primitive(java_class)) { 574 name = vmSymbols::type_signature(primitive_type(java_class)); 575 // Because this can create a new symbol, the caller has to decrement 576 // the refcount, so make adjustment here and below for symbols returned 577 // that are not created or incremented due to a successful lookup. 578 name->increment_refcount(); 579 } else { 580 klassOop k = as_klassOop(java_class); 581 if (!Klass::cast(k)->oop_is_instance()) { 582 name = Klass::cast(k)->name(); 583 name->increment_refcount(); 584 } else { 585 ResourceMark rm; 586 const char* sigstr = Klass::cast(k)->signature_name(); 587 int siglen = (int) strlen(sigstr); 588 if (!intern_if_not_found) { 589 name = SymbolTable::probe(sigstr, siglen); 590 } else { 591 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 592 } 593 } 594 } 595 return name; 596 } 597 598 599 klassOop java_lang_Class::array_klass(oop java_class) { 600 klassOop k = klassOop(java_class->obj_field(array_klass_offset)); 601 assert(k == NULL || k->is_klass() && Klass::cast(k)->oop_is_javaArray(), "should be array klass"); 602 return k; 603 } 604 605 606 void java_lang_Class::set_array_klass(oop java_class, klassOop klass) { 607 assert(klass->is_klass() && Klass::cast(klass)->oop_is_javaArray(), "should be array klass"); 608 java_class->obj_field_put(array_klass_offset, klass); 609 } 610 611 612 methodOop java_lang_Class::resolved_constructor(oop java_class) { 613 oop constructor = java_class->obj_field(resolved_constructor_offset); 614 assert(constructor == NULL || constructor->is_method(), "should be method"); 615 return methodOop(constructor); 616 } 617 618 619 void java_lang_Class::set_resolved_constructor(oop java_class, methodOop constructor) { 620 assert(constructor->is_method(), "should be method"); 621 java_class->obj_field_put(resolved_constructor_offset, constructor); 622 } 623 624 625 bool java_lang_Class::is_primitive(oop java_class) { 626 // should assert: 627 //assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 628 klassOop k = klassOop(java_class->obj_field(klass_offset)); 629 return k == NULL; 630 } 631 632 633 BasicType java_lang_Class::primitive_type(oop java_class) { 634 assert(java_lang_Class::is_primitive(java_class), "just checking"); 635 klassOop ak = klassOop(java_class->obj_field(array_klass_offset)); 636 BasicType type = T_VOID; 637 if (ak != NULL) { 638 // Note: create_basic_type_mirror above initializes ak to a non-null value. 639 type = arrayKlass::cast(ak)->element_type(); 640 } else { 641 assert(java_class == Universe::void_mirror(), "only valid non-array primitive"); 642 } 643 assert(Universe::java_mirror(type) == java_class, "must be consistent"); 644 return type; 645 } 646 647 BasicType java_lang_Class::as_BasicType(oop java_class, klassOop* reference_klass) { 648 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 649 if (is_primitive(java_class)) { 650 if (reference_klass != NULL) 651 (*reference_klass) = NULL; 652 return primitive_type(java_class); 653 } else { 654 if (reference_klass != NULL) 655 (*reference_klass) = as_klassOop(java_class); 656 return T_OBJECT; 657 } 658 } 659 660 661 oop java_lang_Class::primitive_mirror(BasicType t) { 662 oop mirror = Universe::java_mirror(t); 663 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class"); 664 assert(java_lang_Class::is_primitive(mirror), "must be primitive"); 665 return mirror; 666 } 667 668 bool java_lang_Class::offsets_computed = false; 669 int java_lang_Class::classRedefinedCount_offset = -1; 670 int java_lang_Class::parallelCapable_offset = -1; 671 672 void java_lang_Class::compute_offsets() { 673 assert(!offsets_computed, "offsets should be initialized only once"); 674 offsets_computed = true; 675 676 klassOop k = SystemDictionary::Class_klass(); 677 // The classRedefinedCount field is only present starting in 1.5, 678 // so don't go fatal. 679 compute_optional_offset(classRedefinedCount_offset, 680 k, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature()); 681 682 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7, 683 klassOop k1 = SystemDictionary::ClassLoader_klass(); 684 compute_optional_offset(parallelCapable_offset, 685 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature()); 686 } 687 688 // For class loader classes, parallelCapable defined 689 // based on non-null field 690 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it 691 bool java_lang_Class::parallelCapable(oop class_loader) { 692 if (!JDK_Version::is_gte_jdk17x_version() 693 || parallelCapable_offset == -1) { 694 // Default for backward compatibility is false 695 return false; 696 } 697 return (class_loader->obj_field(parallelCapable_offset) != NULL); 698 } 699 700 int java_lang_Class::classRedefinedCount(oop the_class_mirror) { 701 if (!JDK_Version::is_gte_jdk15x_version() 702 || classRedefinedCount_offset == -1) { 703 // The classRedefinedCount field is only present starting in 1.5. 704 // If we don't have an offset for it then just return -1 as a marker. 705 return -1; 706 } 707 708 return the_class_mirror->int_field(classRedefinedCount_offset); 709 } 710 711 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) { 712 if (!JDK_Version::is_gte_jdk15x_version() 713 || classRedefinedCount_offset == -1) { 714 // The classRedefinedCount field is only present starting in 1.5. 715 // If we don't have an offset for it then nothing to set. 716 return; 717 } 718 719 the_class_mirror->int_field_put(classRedefinedCount_offset, value); 720 } 721 722 723 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the 724 // platform thread structure, and a eetop offset which was used for thread 725 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures 726 // merged, so in the HotSpot VM we just use the eetop field for the thread 727 // instead of the privateInfo_offset. 728 // 729 // Note: The stackSize field is only present starting in 1.4. 730 731 int java_lang_Thread::_name_offset = 0; 732 int java_lang_Thread::_group_offset = 0; 733 int java_lang_Thread::_contextClassLoader_offset = 0; 734 int java_lang_Thread::_inheritedAccessControlContext_offset = 0; 735 int java_lang_Thread::_priority_offset = 0; 736 int java_lang_Thread::_eetop_offset = 0; 737 int java_lang_Thread::_daemon_offset = 0; 738 int java_lang_Thread::_stillborn_offset = 0; 739 int java_lang_Thread::_stackSize_offset = 0; 740 int java_lang_Thread::_tid_offset = 0; 741 int java_lang_Thread::_thread_status_offset = 0; 742 int java_lang_Thread::_park_blocker_offset = 0; 743 int java_lang_Thread::_park_event_offset = 0 ; 744 745 746 void java_lang_Thread::compute_offsets() { 747 assert(_group_offset == 0, "offsets should be initialized only once"); 748 749 klassOop k = SystemDictionary::Thread_klass(); 750 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::char_array_signature()); 751 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature()); 752 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature()); 753 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature()); 754 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature()); 755 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature()); 756 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature()); 757 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature()); 758 // The stackSize field is only present starting in 1.4, so don't go fatal. 759 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature()); 760 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal. 761 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature()); 762 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature()); 763 // The parkBlocker field is only present starting in 1.6, so don't go fatal. 764 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature()); 765 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(), 766 vmSymbols::long_signature()); 767 } 768 769 770 JavaThread* java_lang_Thread::thread(oop java_thread) { 771 return (JavaThread*)java_thread->address_field(_eetop_offset); 772 } 773 774 775 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) { 776 java_thread->address_field_put(_eetop_offset, (address)thread); 777 } 778 779 780 typeArrayOop java_lang_Thread::name(oop java_thread) { 781 oop name = java_thread->obj_field(_name_offset); 782 assert(name == NULL || (name->is_typeArray() && typeArrayKlass::cast(name->klass())->element_type() == T_CHAR), "just checking"); 783 return typeArrayOop(name); 784 } 785 786 787 void java_lang_Thread::set_name(oop java_thread, typeArrayOop name) { 788 assert(java_thread->obj_field(_name_offset) == NULL, "name should be NULL"); 789 java_thread->obj_field_put(_name_offset, name); 790 } 791 792 793 ThreadPriority java_lang_Thread::priority(oop java_thread) { 794 return (ThreadPriority)java_thread->int_field(_priority_offset); 795 } 796 797 798 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) { 799 java_thread->int_field_put(_priority_offset, priority); 800 } 801 802 803 oop java_lang_Thread::threadGroup(oop java_thread) { 804 return java_thread->obj_field(_group_offset); 805 } 806 807 808 bool java_lang_Thread::is_stillborn(oop java_thread) { 809 return java_thread->bool_field(_stillborn_offset) != 0; 810 } 811 812 813 // We never have reason to turn the stillborn bit off 814 void java_lang_Thread::set_stillborn(oop java_thread) { 815 java_thread->bool_field_put(_stillborn_offset, true); 816 } 817 818 819 bool java_lang_Thread::is_alive(oop java_thread) { 820 JavaThread* thr = java_lang_Thread::thread(java_thread); 821 return (thr != NULL); 822 } 823 824 825 bool java_lang_Thread::is_daemon(oop java_thread) { 826 return java_thread->bool_field(_daemon_offset) != 0; 827 } 828 829 830 void java_lang_Thread::set_daemon(oop java_thread) { 831 java_thread->bool_field_put(_daemon_offset, true); 832 } 833 834 oop java_lang_Thread::context_class_loader(oop java_thread) { 835 return java_thread->obj_field(_contextClassLoader_offset); 836 } 837 838 oop java_lang_Thread::inherited_access_control_context(oop java_thread) { 839 return java_thread->obj_field(_inheritedAccessControlContext_offset); 840 } 841 842 843 jlong java_lang_Thread::stackSize(oop java_thread) { 844 // The stackSize field is only present starting in 1.4 845 if (_stackSize_offset > 0) { 846 assert(JDK_Version::is_gte_jdk14x_version(), "sanity check"); 847 return java_thread->long_field(_stackSize_offset); 848 } else { 849 return 0; 850 } 851 } 852 853 // Write the thread status value to threadStatus field in java.lang.Thread java class. 854 void java_lang_Thread::set_thread_status(oop java_thread, 855 java_lang_Thread::ThreadStatus status) { 856 assert(JavaThread::current()->thread_state() == _thread_in_vm, "Java Thread is not running in vm"); 857 // The threadStatus is only present starting in 1.5 858 if (_thread_status_offset > 0) { 859 java_thread->int_field_put(_thread_status_offset, status); 860 } 861 } 862 863 // Read thread status value from threadStatus field in java.lang.Thread java class. 864 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) { 865 assert(Thread::current()->is_VM_thread() || 866 JavaThread::current()->thread_state() == _thread_in_vm, 867 "Java Thread is not running in vm"); 868 // The threadStatus is only present starting in 1.5 869 if (_thread_status_offset > 0) { 870 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 871 } else { 872 // All we can easily figure out is if it is alive, but that is 873 // enough info for a valid unknown status. 874 // These aren't restricted to valid set ThreadStatus values, so 875 // use JVMTI values and cast. 876 JavaThread* thr = java_lang_Thread::thread(java_thread); 877 if (thr == NULL) { 878 // the thread hasn't run yet or is in the process of exiting 879 return NEW; 880 } 881 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE; 882 } 883 } 884 885 886 jlong java_lang_Thread::thread_id(oop java_thread) { 887 // The thread ID field is only present starting in 1.5 888 if (_tid_offset > 0) { 889 return java_thread->long_field(_tid_offset); 890 } else { 891 return 0; 892 } 893 } 894 895 oop java_lang_Thread::park_blocker(oop java_thread) { 896 assert(JDK_Version::current().supports_thread_park_blocker() && 897 _park_blocker_offset != 0, "Must support parkBlocker field"); 898 899 if (_park_blocker_offset > 0) { 900 return java_thread->obj_field(_park_blocker_offset); 901 } 902 903 return NULL; 904 } 905 906 jlong java_lang_Thread::park_event(oop java_thread) { 907 if (_park_event_offset > 0) { 908 return java_thread->long_field(_park_event_offset); 909 } 910 return 0; 911 } 912 913 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) { 914 if (_park_event_offset > 0) { 915 java_thread->long_field_put(_park_event_offset, ptr); 916 return true; 917 } 918 return false; 919 } 920 921 922 const char* java_lang_Thread::thread_status_name(oop java_thread) { 923 assert(JDK_Version::is_gte_jdk15x_version() && _thread_status_offset != 0, "Must have thread status"); 924 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 925 switch (status) { 926 case NEW : return "NEW"; 927 case RUNNABLE : return "RUNNABLE"; 928 case SLEEPING : return "TIMED_WAITING (sleeping)"; 929 case IN_OBJECT_WAIT : return "WAITING (on object monitor)"; 930 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)"; 931 case PARKED : return "WAITING (parking)"; 932 case PARKED_TIMED : return "TIMED_WAITING (parking)"; 933 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)"; 934 case TERMINATED : return "TERMINATED"; 935 default : return "UNKNOWN"; 936 }; 937 } 938 int java_lang_ThreadGroup::_parent_offset = 0; 939 int java_lang_ThreadGroup::_name_offset = 0; 940 int java_lang_ThreadGroup::_threads_offset = 0; 941 int java_lang_ThreadGroup::_groups_offset = 0; 942 int java_lang_ThreadGroup::_maxPriority_offset = 0; 943 int java_lang_ThreadGroup::_destroyed_offset = 0; 944 int java_lang_ThreadGroup::_daemon_offset = 0; 945 int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0; 946 int java_lang_ThreadGroup::_nthreads_offset = 0; 947 int java_lang_ThreadGroup::_ngroups_offset = 0; 948 949 oop java_lang_ThreadGroup::parent(oop java_thread_group) { 950 assert(java_thread_group->is_oop(), "thread group must be oop"); 951 return java_thread_group->obj_field(_parent_offset); 952 } 953 954 // ("name as oop" accessor is not necessary) 955 956 typeArrayOop java_lang_ThreadGroup::name(oop java_thread_group) { 957 oop name = java_thread_group->obj_field(_name_offset); 958 // ThreadGroup.name can be null 959 return name == NULL ? (typeArrayOop)NULL : java_lang_String::value(name); 960 } 961 962 int java_lang_ThreadGroup::nthreads(oop java_thread_group) { 963 assert(java_thread_group->is_oop(), "thread group must be oop"); 964 return java_thread_group->int_field(_nthreads_offset); 965 } 966 967 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) { 968 oop threads = java_thread_group->obj_field(_threads_offset); 969 assert(threads != NULL, "threadgroups should have threads"); 970 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code 971 return objArrayOop(threads); 972 } 973 974 int java_lang_ThreadGroup::ngroups(oop java_thread_group) { 975 assert(java_thread_group->is_oop(), "thread group must be oop"); 976 return java_thread_group->int_field(_ngroups_offset); 977 } 978 979 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) { 980 oop groups = java_thread_group->obj_field(_groups_offset); 981 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code 982 return objArrayOop(groups); 983 } 984 985 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) { 986 assert(java_thread_group->is_oop(), "thread group must be oop"); 987 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset); 988 } 989 990 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) { 991 assert(java_thread_group->is_oop(), "thread group must be oop"); 992 return java_thread_group->bool_field(_destroyed_offset) != 0; 993 } 994 995 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) { 996 assert(java_thread_group->is_oop(), "thread group must be oop"); 997 return java_thread_group->bool_field(_daemon_offset) != 0; 998 } 999 1000 bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) { 1001 assert(java_thread_group->is_oop(), "thread group must be oop"); 1002 return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0; 1003 } 1004 1005 void java_lang_ThreadGroup::compute_offsets() { 1006 assert(_parent_offset == 0, "offsets should be initialized only once"); 1007 1008 klassOop k = SystemDictionary::ThreadGroup_klass(); 1009 1010 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature()); 1011 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1012 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature()); 1013 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature()); 1014 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature()); 1015 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature()); 1016 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature()); 1017 compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature()); 1018 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature()); 1019 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature()); 1020 } 1021 1022 oop java_lang_Throwable::unassigned_stacktrace() { 1023 instanceKlass* ik = instanceKlass::cast(SystemDictionary::Throwable_klass()); 1024 address addr = ik->static_field_addr(static_unassigned_stacktrace_offset); 1025 if (UseCompressedOops) { 1026 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 1027 } else { 1028 return oopDesc::load_decode_heap_oop((oop*)addr); 1029 } 1030 } 1031 1032 oop java_lang_Throwable::backtrace(oop throwable) { 1033 return throwable->obj_field_acquire(backtrace_offset); 1034 } 1035 1036 1037 void java_lang_Throwable::set_backtrace(oop throwable, oop value) { 1038 throwable->release_obj_field_put(backtrace_offset, value); 1039 } 1040 1041 1042 oop java_lang_Throwable::message(oop throwable) { 1043 return throwable->obj_field(detailMessage_offset); 1044 } 1045 1046 1047 oop java_lang_Throwable::message(Handle throwable) { 1048 return throwable->obj_field(detailMessage_offset); 1049 } 1050 1051 1052 void java_lang_Throwable::set_message(oop throwable, oop value) { 1053 throwable->obj_field_put(detailMessage_offset, value); 1054 } 1055 1056 1057 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) { 1058 throwable->obj_field_put(stackTrace_offset, st_element_array); 1059 } 1060 1061 void java_lang_Throwable::clear_stacktrace(oop throwable) { 1062 assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4"); 1063 set_stacktrace(throwable, NULL); 1064 } 1065 1066 1067 void java_lang_Throwable::print(oop throwable, outputStream* st) { 1068 ResourceMark rm; 1069 klassOop k = throwable->klass(); 1070 assert(k != NULL, "just checking"); 1071 st->print("%s", instanceKlass::cast(k)->external_name()); 1072 oop msg = message(throwable); 1073 if (msg != NULL) { 1074 st->print(": %s", java_lang_String::as_utf8_string(msg)); 1075 } 1076 } 1077 1078 1079 void java_lang_Throwable::print(Handle throwable, outputStream* st) { 1080 ResourceMark rm; 1081 klassOop k = throwable->klass(); 1082 assert(k != NULL, "just checking"); 1083 st->print("%s", instanceKlass::cast(k)->external_name()); 1084 oop msg = message(throwable); 1085 if (msg != NULL) { 1086 st->print(": %s", java_lang_String::as_utf8_string(msg)); 1087 } 1088 } 1089 1090 // Print stack trace element to resource allocated buffer 1091 char* java_lang_Throwable::print_stack_element_to_buffer(methodOop method, int bci) { 1092 // Get strings and string lengths 1093 instanceKlass* klass = instanceKlass::cast(method->method_holder()); 1094 const char* klass_name = klass->external_name(); 1095 int buf_len = (int)strlen(klass_name); 1096 char* source_file_name; 1097 if (klass->source_file_name() == NULL) { 1098 source_file_name = NULL; 1099 } else { 1100 source_file_name = klass->source_file_name()->as_C_string(); 1101 buf_len += (int)strlen(source_file_name); 1102 } 1103 char* method_name = method->name()->as_C_string(); 1104 buf_len += (int)strlen(method_name); 1105 1106 // Allocate temporary buffer with extra space for formatting and line number 1107 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64); 1108 1109 // Print stack trace line in buffer 1110 sprintf(buf, "\tat %s.%s", klass_name, method_name); 1111 if (method->is_native()) { 1112 strcat(buf, "(Native Method)"); 1113 } else { 1114 int line_number = method->line_number_from_bci(bci); 1115 if (source_file_name != NULL && (line_number != -1)) { 1116 // Sourcename and linenumber 1117 sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number); 1118 } else if (source_file_name != NULL) { 1119 // Just sourcename 1120 sprintf(buf + (int)strlen(buf), "(%s)", source_file_name); 1121 } else { 1122 // Neither soucename and linenumber 1123 sprintf(buf + (int)strlen(buf), "(Unknown Source)"); 1124 } 1125 nmethod* nm = method->code(); 1126 if (WizardMode && nm != NULL) { 1127 sprintf(buf + (int)strlen(buf), "(nmethod " PTR_FORMAT ")", (intptr_t)nm); 1128 } 1129 } 1130 1131 return buf; 1132 } 1133 1134 1135 void java_lang_Throwable::print_stack_element(Handle stream, methodOop method, int bci) { 1136 ResourceMark rm; 1137 char* buf = print_stack_element_to_buffer(method, bci); 1138 print_to_stream(stream, buf); 1139 } 1140 1141 void java_lang_Throwable::print_stack_element(outputStream *st, methodOop method, int bci) { 1142 ResourceMark rm; 1143 char* buf = print_stack_element_to_buffer(method, bci); 1144 st->print_cr("%s", buf); 1145 } 1146 1147 void java_lang_Throwable::print_to_stream(Handle stream, const char* str) { 1148 if (stream.is_null()) { 1149 tty->print_cr("%s", str); 1150 } else { 1151 EXCEPTION_MARK; 1152 JavaValue result(T_VOID); 1153 Handle arg (THREAD, oopFactory::new_charArray(str, THREAD)); 1154 if (!HAS_PENDING_EXCEPTION) { 1155 JavaCalls::call_virtual(&result, 1156 stream, 1157 KlassHandle(THREAD, stream->klass()), 1158 vmSymbols::println_name(), 1159 vmSymbols::char_array_void_signature(), 1160 arg, 1161 THREAD); 1162 } 1163 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 1164 if (HAS_PENDING_EXCEPTION) CLEAR_PENDING_EXCEPTION; 1165 } 1166 1167 } 1168 1169 1170 const char* java_lang_Throwable::no_stack_trace_message() { 1171 return "\t<<no stack trace available>>"; 1172 } 1173 1174 1175 // Currently used only for exceptions occurring during startup 1176 void java_lang_Throwable::print_stack_trace(oop throwable, outputStream* st) { 1177 Thread *THREAD = Thread::current(); 1178 Handle h_throwable(THREAD, throwable); 1179 while (h_throwable.not_null()) { 1180 objArrayHandle result (THREAD, objArrayOop(backtrace(h_throwable()))); 1181 if (result.is_null()) { 1182 st->print_cr(no_stack_trace_message()); 1183 return; 1184 } 1185 1186 while (result.not_null()) { 1187 objArrayHandle methods (THREAD, 1188 objArrayOop(result->obj_at(trace_methods_offset))); 1189 typeArrayHandle bcis (THREAD, 1190 typeArrayOop(result->obj_at(trace_bcis_offset))); 1191 1192 if (methods.is_null() || bcis.is_null()) { 1193 st->print_cr(no_stack_trace_message()); 1194 return; 1195 } 1196 1197 int length = methods()->length(); 1198 for (int index = 0; index < length; index++) { 1199 methodOop method = methodOop(methods()->obj_at(index)); 1200 if (method == NULL) goto handle_cause; 1201 int bci = bcis->ushort_at(index); 1202 print_stack_element(st, method, bci); 1203 } 1204 result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset))); 1205 } 1206 handle_cause: 1207 { 1208 EXCEPTION_MARK; 1209 JavaValue result(T_OBJECT); 1210 JavaCalls::call_virtual(&result, 1211 h_throwable, 1212 KlassHandle(THREAD, h_throwable->klass()), 1213 vmSymbols::getCause_name(), 1214 vmSymbols::void_throwable_signature(), 1215 THREAD); 1216 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 1217 if (HAS_PENDING_EXCEPTION) { 1218 CLEAR_PENDING_EXCEPTION; 1219 h_throwable = Handle(); 1220 } else { 1221 h_throwable = Handle(THREAD, (oop) result.get_jobject()); 1222 if (h_throwable.not_null()) { 1223 st->print("Caused by: "); 1224 print(h_throwable, st); 1225 st->cr(); 1226 } 1227 } 1228 } 1229 } 1230 } 1231 1232 1233 void java_lang_Throwable::print_stack_trace(oop throwable, oop print_stream) { 1234 // Note: this is no longer used in Merlin, but we support it for compatibility. 1235 Thread *thread = Thread::current(); 1236 Handle stream(thread, print_stream); 1237 objArrayHandle result (thread, objArrayOop(backtrace(throwable))); 1238 if (result.is_null()) { 1239 print_to_stream(stream, no_stack_trace_message()); 1240 return; 1241 } 1242 1243 while (result.not_null()) { 1244 objArrayHandle methods (thread, 1245 objArrayOop(result->obj_at(trace_methods_offset))); 1246 typeArrayHandle bcis (thread, 1247 typeArrayOop(result->obj_at(trace_bcis_offset))); 1248 1249 if (methods.is_null() || bcis.is_null()) { 1250 print_to_stream(stream, no_stack_trace_message()); 1251 return; 1252 } 1253 1254 int length = methods()->length(); 1255 for (int index = 0; index < length; index++) { 1256 methodOop method = methodOop(methods()->obj_at(index)); 1257 if (method == NULL) return; 1258 int bci = bcis->ushort_at(index); 1259 print_stack_element(stream, method, bci); 1260 } 1261 result = objArrayHandle(thread, objArrayOop(result->obj_at(trace_next_offset))); 1262 } 1263 } 1264 1265 // This class provides a simple wrapper over the internal structure of 1266 // exception backtrace to insulate users of the backtrace from needing 1267 // to know what it looks like. 1268 class BacktraceBuilder: public StackObj { 1269 private: 1270 Handle _backtrace; 1271 objArrayOop _head; 1272 objArrayOop _methods; 1273 typeArrayOop _bcis; 1274 int _index; 1275 No_Safepoint_Verifier _nsv; 1276 1277 public: 1278 1279 enum { 1280 trace_methods_offset = java_lang_Throwable::trace_methods_offset, 1281 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset, 1282 trace_next_offset = java_lang_Throwable::trace_next_offset, 1283 trace_size = java_lang_Throwable::trace_size, 1284 trace_chunk_size = java_lang_Throwable::trace_chunk_size 1285 }; 1286 1287 // constructor for new backtrace 1288 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL) { 1289 expand(CHECK); 1290 _backtrace = _head; 1291 _index = 0; 1292 } 1293 1294 void expand(TRAPS) { 1295 objArrayHandle old_head(THREAD, _head); 1296 Pause_No_Safepoint_Verifier pnsv(&_nsv); 1297 1298 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK); 1299 objArrayHandle new_head(THREAD, head); 1300 1301 objArrayOop methods = oopFactory::new_objectArray(trace_chunk_size, CHECK); 1302 objArrayHandle new_methods(THREAD, methods); 1303 1304 typeArrayOop bcis = oopFactory::new_shortArray(trace_chunk_size, CHECK); 1305 typeArrayHandle new_bcis(THREAD, bcis); 1306 1307 if (!old_head.is_null()) { 1308 old_head->obj_at_put(trace_next_offset, new_head()); 1309 } 1310 new_head->obj_at_put(trace_methods_offset, new_methods()); 1311 new_head->obj_at_put(trace_bcis_offset, new_bcis()); 1312 1313 _head = new_head(); 1314 _methods = new_methods(); 1315 _bcis = new_bcis(); 1316 _index = 0; 1317 } 1318 1319 oop backtrace() { 1320 return _backtrace(); 1321 } 1322 1323 inline void push(methodOop method, short bci, TRAPS) { 1324 if (_index >= trace_chunk_size) { 1325 methodHandle mhandle(THREAD, method); 1326 expand(CHECK); 1327 method = mhandle(); 1328 } 1329 1330 _methods->obj_at_put(_index, method); 1331 _bcis->ushort_at_put(_index, bci); 1332 _index++; 1333 } 1334 1335 methodOop current_method() { 1336 assert(_index >= 0 && _index < trace_chunk_size, "out of range"); 1337 return methodOop(_methods->obj_at(_index)); 1338 } 1339 1340 jushort current_bci() { 1341 assert(_index >= 0 && _index < trace_chunk_size, "out of range"); 1342 return _bcis->ushort_at(_index); 1343 } 1344 }; 1345 1346 1347 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS) { 1348 if (!StackTraceInThrowable) return; 1349 ResourceMark rm(THREAD); 1350 1351 // Start out by clearing the backtrace for this object, in case the VM 1352 // runs out of memory while allocating the stack trace 1353 set_backtrace(throwable(), NULL); 1354 if (JDK_Version::is_gte_jdk14x_version()) { 1355 // New since 1.4, clear lazily constructed Java level stacktrace if 1356 // refilling occurs 1357 // This is unnecessary in 1.7+ but harmless 1358 clear_stacktrace(throwable()); 1359 } 1360 1361 int max_depth = MaxJavaStackTraceDepth; 1362 JavaThread* thread = (JavaThread*)THREAD; 1363 BacktraceBuilder bt(CHECK); 1364 1365 // If there is no Java frame just return the method that was being called 1366 // with bci 0 1367 if (!thread->has_last_Java_frame()) { 1368 if (max_depth >= 1 && method() != NULL) { 1369 bt.push(method(), 0, CHECK); 1370 set_backtrace(throwable(), bt.backtrace()); 1371 } 1372 return; 1373 } 1374 1375 // Instead of using vframe directly, this version of fill_in_stack_trace 1376 // basically handles everything by hand. This significantly improved the 1377 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows. 1378 // See bug 6333838 for more details. 1379 // The "ASSERT" here is to verify this method generates the exactly same stack 1380 // trace as utilizing vframe. 1381 #ifdef ASSERT 1382 vframeStream st(thread); 1383 methodHandle st_method(THREAD, st.method()); 1384 #endif 1385 int total_count = 0; 1386 RegisterMap map(thread, false); 1387 int decode_offset = 0; 1388 nmethod* nm = NULL; 1389 bool skip_fillInStackTrace_check = false; 1390 bool skip_throwableInit_check = false; 1391 1392 for (frame fr = thread->last_frame(); max_depth != total_count;) { 1393 methodOop method = NULL; 1394 int bci = 0; 1395 1396 // Compiled java method case. 1397 if (decode_offset != 0) { 1398 DebugInfoReadStream stream(nm, decode_offset); 1399 decode_offset = stream.read_int(); 1400 method = (methodOop)nm->oop_at(stream.read_int()); 1401 bci = stream.read_bci(); 1402 } else { 1403 if (fr.is_first_frame()) break; 1404 address pc = fr.pc(); 1405 if (fr.is_interpreted_frame()) { 1406 intptr_t bcx = fr.interpreter_frame_bcx(); 1407 method = fr.interpreter_frame_method(); 1408 bci = fr.is_bci(bcx) ? bcx : method->bci_from((address)bcx); 1409 fr = fr.sender(&map); 1410 } else { 1411 CodeBlob* cb = fr.cb(); 1412 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL 1413 // but non nmethod 1414 fr = fr.sender(&map); 1415 if (cb == NULL || !cb->is_nmethod()) { 1416 continue; 1417 } 1418 nm = (nmethod*)cb; 1419 if (nm->method()->is_native()) { 1420 method = nm->method(); 1421 bci = 0; 1422 } else { 1423 PcDesc* pd = nm->pc_desc_at(pc); 1424 decode_offset = pd->scope_decode_offset(); 1425 // if decode_offset is not equal to 0, it will execute the 1426 // "compiled java method case" at the beginning of the loop. 1427 continue; 1428 } 1429 } 1430 } 1431 #ifdef ASSERT 1432 assert(st_method() == method && st.bci() == bci, 1433 "Wrong stack trace"); 1434 st.next(); 1435 // vframeStream::method isn't GC-safe so store off a copy 1436 // of the methodOop in case we GC. 1437 if (!st.at_end()) { 1438 st_method = st.method(); 1439 } 1440 #endif 1441 1442 // the format of the stacktrace will be: 1443 // - 1 or more fillInStackTrace frames for the exception class (skipped) 1444 // - 0 or more <init> methods for the exception class (skipped) 1445 // - rest of the stack 1446 1447 if (!skip_fillInStackTrace_check) { 1448 if ((method->name() == vmSymbols::fillInStackTrace_name() || 1449 method->name() == vmSymbols::fillInStackTrace0_name()) && 1450 throwable->is_a(method->method_holder())) { 1451 continue; 1452 } 1453 else { 1454 skip_fillInStackTrace_check = true; // gone past them all 1455 } 1456 } 1457 if (!skip_throwableInit_check) { 1458 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering"); 1459 1460 // skip <init> methods of the exception class and superclasses 1461 // This is simlar to classic VM. 1462 if (method->name() == vmSymbols::object_initializer_name() && 1463 throwable->is_a(method->method_holder())) { 1464 continue; 1465 } else { 1466 // there are none or we've seen them all - either way stop checking 1467 skip_throwableInit_check = true; 1468 } 1469 } 1470 bt.push(method, bci, CHECK); 1471 total_count++; 1472 } 1473 1474 // Put completed stack trace into throwable object 1475 set_backtrace(throwable(), bt.backtrace()); 1476 } 1477 1478 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method) { 1479 // No-op if stack trace is disabled 1480 if (!StackTraceInThrowable) { 1481 return; 1482 } 1483 1484 // Disable stack traces for some preallocated out of memory errors 1485 if (!Universe::should_fill_in_stack_trace(throwable)) { 1486 return; 1487 } 1488 1489 PRESERVE_EXCEPTION_MARK; 1490 1491 JavaThread* thread = JavaThread::active(); 1492 fill_in_stack_trace(throwable, method, thread); 1493 // ignore exceptions thrown during stack trace filling 1494 CLEAR_PENDING_EXCEPTION; 1495 } 1496 1497 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 1498 // Allocate stack trace - backtrace is created but not filled in 1499 1500 // No-op if stack trace is disabled 1501 if (!StackTraceInThrowable) return; 1502 1503 objArrayOop h_oop = oopFactory::new_objectArray(trace_size, CHECK); 1504 objArrayHandle backtrace (THREAD, h_oop); 1505 objArrayOop m_oop = oopFactory::new_objectArray(trace_chunk_size, CHECK); 1506 objArrayHandle methods (THREAD, m_oop); 1507 typeArrayOop b = oopFactory::new_shortArray(trace_chunk_size, CHECK); 1508 typeArrayHandle bcis(THREAD, b); 1509 1510 // backtrace has space for one chunk (next is NULL) 1511 backtrace->obj_at_put(trace_methods_offset, methods()); 1512 backtrace->obj_at_put(trace_bcis_offset, bcis()); 1513 set_backtrace(throwable(), backtrace()); 1514 } 1515 1516 1517 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 1518 // Fill in stack trace into preallocated backtrace (no GC) 1519 1520 // No-op if stack trace is disabled 1521 if (!StackTraceInThrowable) return; 1522 1523 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check"); 1524 1525 oop backtrace = java_lang_Throwable::backtrace(throwable()); 1526 assert(backtrace != NULL, "backtrace not preallocated"); 1527 1528 oop m = objArrayOop(backtrace)->obj_at(trace_methods_offset); 1529 objArrayOop methods = objArrayOop(m); 1530 assert(methods != NULL && methods->length() > 0, "method array not preallocated"); 1531 1532 oop b = objArrayOop(backtrace)->obj_at(trace_bcis_offset); 1533 typeArrayOop bcis = typeArrayOop(b); 1534 assert(bcis != NULL, "bci array not preallocated"); 1535 1536 assert(methods->length() == bcis->length(), "method and bci arrays should match"); 1537 1538 JavaThread* thread = JavaThread::current(); 1539 ResourceMark rm(thread); 1540 vframeStream st(thread); 1541 1542 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 1543 // methods as preallocated errors aren't created by "java" code. 1544 1545 // fill in as much stack trace as possible 1546 int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth); 1547 int chunk_count = 0; 1548 1549 for (;!st.at_end(); st.next()) { 1550 // add element 1551 bcis->ushort_at_put(chunk_count, st.bci()); 1552 methods->obj_at_put(chunk_count, st.method()); 1553 1554 chunk_count++; 1555 1556 // Bail-out for deep stacks 1557 if (chunk_count >= max_chunks) break; 1558 } 1559 1560 // For Java 7+ we support the Throwable immutability protocol defined for Java 7. This support 1561 // was missing in 7u0 so in 7u0 there is a workaround in the Throwable class. That workaround 1562 // can be removed in a JDK using this JVM version 1563 if (JDK_Version::is_gte_jdk17x_version()) { 1564 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace()); 1565 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized"); 1566 } 1567 1568 } 1569 1570 1571 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) { 1572 if (throwable == NULL) { 1573 THROW_0(vmSymbols::java_lang_NullPointerException()); 1574 } 1575 objArrayOop chunk = objArrayOop(backtrace(throwable)); 1576 int depth = 0; 1577 if (chunk != NULL) { 1578 // Iterate over chunks and count full ones 1579 while (true) { 1580 objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset)); 1581 if (next == NULL) break; 1582 depth += trace_chunk_size; 1583 chunk = next; 1584 } 1585 assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check"); 1586 // Count element in remaining partial chunk 1587 objArrayOop methods = objArrayOop(chunk->obj_at(trace_methods_offset)); 1588 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 1589 assert(methods != NULL && bcis != NULL, "sanity check"); 1590 for (int i = 0; i < methods->length(); i++) { 1591 if (methods->obj_at(i) == NULL) break; 1592 depth++; 1593 } 1594 } 1595 return depth; 1596 } 1597 1598 1599 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) { 1600 if (throwable == NULL) { 1601 THROW_0(vmSymbols::java_lang_NullPointerException()); 1602 } 1603 if (index < 0) { 1604 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 1605 } 1606 // Compute how many chunks to skip and index into actual chunk 1607 objArrayOop chunk = objArrayOop(backtrace(throwable)); 1608 int skip_chunks = index / trace_chunk_size; 1609 int chunk_index = index % trace_chunk_size; 1610 while (chunk != NULL && skip_chunks > 0) { 1611 chunk = objArrayOop(chunk->obj_at(trace_next_offset)); 1612 skip_chunks--; 1613 } 1614 if (chunk == NULL) { 1615 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 1616 } 1617 // Get method,bci from chunk 1618 objArrayOop methods = objArrayOop(chunk->obj_at(trace_methods_offset)); 1619 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 1620 assert(methods != NULL && bcis != NULL, "sanity check"); 1621 methodHandle method(THREAD, methodOop(methods->obj_at(chunk_index))); 1622 int bci = bcis->ushort_at(chunk_index); 1623 // Chunk can be partial full 1624 if (method.is_null()) { 1625 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 1626 } 1627 1628 oop element = java_lang_StackTraceElement::create(method, bci, CHECK_0); 1629 return element; 1630 } 1631 1632 oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) { 1633 // SystemDictionary::stackTraceElement_klass() will be null for pre-1.4 JDKs 1634 assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4"); 1635 1636 // Allocate java.lang.StackTraceElement instance 1637 klassOop k = SystemDictionary::StackTraceElement_klass(); 1638 assert(k != NULL, "must be loaded in 1.4+"); 1639 instanceKlassHandle ik (THREAD, k); 1640 if (ik->should_be_initialized()) { 1641 ik->initialize(CHECK_0); 1642 } 1643 1644 Handle element = ik->allocate_instance_handle(CHECK_0); 1645 // Fill in class name 1646 ResourceMark rm(THREAD); 1647 const char* str = instanceKlass::cast(method->method_holder())->external_name(); 1648 oop classname = StringTable::intern((char*) str, CHECK_0); 1649 java_lang_StackTraceElement::set_declaringClass(element(), classname); 1650 // Fill in method name 1651 oop methodname = StringTable::intern(method->name(), CHECK_0); 1652 java_lang_StackTraceElement::set_methodName(element(), methodname); 1653 // Fill in source file name 1654 Symbol* source = instanceKlass::cast(method->method_holder())->source_file_name(); 1655 oop filename = StringTable::intern(source, CHECK_0); 1656 java_lang_StackTraceElement::set_fileName(element(), filename); 1657 // File in source line number 1658 int line_number; 1659 if (method->is_native()) { 1660 // Negative value different from -1 below, enabling Java code in 1661 // class java.lang.StackTraceElement to distinguish "native" from 1662 // "no LineNumberTable". 1663 line_number = -2; 1664 } else { 1665 // Returns -1 if no LineNumberTable, and otherwise actual line number 1666 line_number = method->line_number_from_bci(bci); 1667 } 1668 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 1669 1670 return element(); 1671 } 1672 1673 1674 void java_lang_reflect_AccessibleObject::compute_offsets() { 1675 klassOop k = SystemDictionary::reflect_AccessibleObject_klass(); 1676 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature()); 1677 } 1678 1679 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 1680 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1681 return (jboolean) reflect->bool_field(override_offset); 1682 } 1683 1684 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 1685 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1686 reflect->bool_field_put(override_offset, (int) value); 1687 } 1688 1689 void java_lang_reflect_Method::compute_offsets() { 1690 klassOop k = SystemDictionary::reflect_Method_klass(); 1691 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 1692 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1693 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature()); 1694 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 1695 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 1696 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 1697 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 1698 // The generic signature and annotations fields are only present in 1.5 1699 signature_offset = -1; 1700 annotations_offset = -1; 1701 parameter_annotations_offset = -1; 1702 annotation_default_offset = -1; 1703 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 1704 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 1705 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 1706 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature()); 1707 } 1708 1709 Handle java_lang_reflect_Method::create(TRAPS) { 1710 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1711 klassOop klass = SystemDictionary::reflect_Method_klass(); 1712 // This class is eagerly initialized during VM initialization, since we keep a refence 1713 // to one of the methods 1714 assert(instanceKlass::cast(klass)->is_initialized(), "must be initialized"); 1715 return instanceKlass::cast(klass)->allocate_instance_handle(CHECK_NH); 1716 } 1717 1718 oop java_lang_reflect_Method::clazz(oop reflect) { 1719 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1720 return reflect->obj_field(clazz_offset); 1721 } 1722 1723 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 1724 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1725 reflect->obj_field_put(clazz_offset, value); 1726 } 1727 1728 int java_lang_reflect_Method::slot(oop reflect) { 1729 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1730 return reflect->int_field(slot_offset); 1731 } 1732 1733 void java_lang_reflect_Method::set_slot(oop reflect, int value) { 1734 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1735 reflect->int_field_put(slot_offset, value); 1736 } 1737 1738 oop java_lang_reflect_Method::name(oop method) { 1739 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1740 return method->obj_field(name_offset); 1741 } 1742 1743 void java_lang_reflect_Method::set_name(oop method, oop value) { 1744 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1745 method->obj_field_put(name_offset, value); 1746 } 1747 1748 oop java_lang_reflect_Method::return_type(oop method) { 1749 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1750 return method->obj_field(returnType_offset); 1751 } 1752 1753 void java_lang_reflect_Method::set_return_type(oop method, oop value) { 1754 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1755 method->obj_field_put(returnType_offset, value); 1756 } 1757 1758 oop java_lang_reflect_Method::parameter_types(oop method) { 1759 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1760 return method->obj_field(parameterTypes_offset); 1761 } 1762 1763 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 1764 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1765 method->obj_field_put(parameterTypes_offset, value); 1766 } 1767 1768 oop java_lang_reflect_Method::exception_types(oop method) { 1769 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1770 return method->obj_field(exceptionTypes_offset); 1771 } 1772 1773 void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 1774 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1775 method->obj_field_put(exceptionTypes_offset, value); 1776 } 1777 1778 int java_lang_reflect_Method::modifiers(oop method) { 1779 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1780 return method->int_field(modifiers_offset); 1781 } 1782 1783 void java_lang_reflect_Method::set_modifiers(oop method, int value) { 1784 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1785 method->int_field_put(modifiers_offset, value); 1786 } 1787 1788 bool java_lang_reflect_Method::has_signature_field() { 1789 return (signature_offset >= 0); 1790 } 1791 1792 oop java_lang_reflect_Method::signature(oop method) { 1793 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1794 assert(has_signature_field(), "signature field must be present"); 1795 return method->obj_field(signature_offset); 1796 } 1797 1798 void java_lang_reflect_Method::set_signature(oop method, oop value) { 1799 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1800 assert(has_signature_field(), "signature field must be present"); 1801 method->obj_field_put(signature_offset, value); 1802 } 1803 1804 bool java_lang_reflect_Method::has_annotations_field() { 1805 return (annotations_offset >= 0); 1806 } 1807 1808 oop java_lang_reflect_Method::annotations(oop method) { 1809 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1810 assert(has_annotations_field(), "annotations field must be present"); 1811 return method->obj_field(annotations_offset); 1812 } 1813 1814 void java_lang_reflect_Method::set_annotations(oop method, oop value) { 1815 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1816 assert(has_annotations_field(), "annotations field must be present"); 1817 method->obj_field_put(annotations_offset, value); 1818 } 1819 1820 bool java_lang_reflect_Method::has_parameter_annotations_field() { 1821 return (parameter_annotations_offset >= 0); 1822 } 1823 1824 oop java_lang_reflect_Method::parameter_annotations(oop method) { 1825 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1826 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 1827 return method->obj_field(parameter_annotations_offset); 1828 } 1829 1830 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 1831 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1832 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 1833 method->obj_field_put(parameter_annotations_offset, value); 1834 } 1835 1836 bool java_lang_reflect_Method::has_annotation_default_field() { 1837 return (annotation_default_offset >= 0); 1838 } 1839 1840 oop java_lang_reflect_Method::annotation_default(oop method) { 1841 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1842 assert(has_annotation_default_field(), "annotation default field must be present"); 1843 return method->obj_field(annotation_default_offset); 1844 } 1845 1846 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 1847 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1848 assert(has_annotation_default_field(), "annotation default field must be present"); 1849 method->obj_field_put(annotation_default_offset, value); 1850 } 1851 1852 void java_lang_reflect_Constructor::compute_offsets() { 1853 klassOop k = SystemDictionary::reflect_Constructor_klass(); 1854 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 1855 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 1856 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 1857 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 1858 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 1859 // The generic signature and annotations fields are only present in 1.5 1860 signature_offset = -1; 1861 annotations_offset = -1; 1862 parameter_annotations_offset = -1; 1863 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 1864 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 1865 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 1866 } 1867 1868 Handle java_lang_reflect_Constructor::create(TRAPS) { 1869 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1870 Symbol* name = vmSymbols::java_lang_reflect_Constructor(); 1871 klassOop k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 1872 instanceKlassHandle klass (THREAD, k); 1873 // Ensure it is initialized 1874 klass->initialize(CHECK_NH); 1875 return klass->allocate_instance_handle(CHECK_NH); 1876 } 1877 1878 oop java_lang_reflect_Constructor::clazz(oop reflect) { 1879 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1880 return reflect->obj_field(clazz_offset); 1881 } 1882 1883 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 1884 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1885 reflect->obj_field_put(clazz_offset, value); 1886 } 1887 1888 oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 1889 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1890 return constructor->obj_field(parameterTypes_offset); 1891 } 1892 1893 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 1894 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1895 constructor->obj_field_put(parameterTypes_offset, value); 1896 } 1897 1898 oop java_lang_reflect_Constructor::exception_types(oop constructor) { 1899 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1900 return constructor->obj_field(exceptionTypes_offset); 1901 } 1902 1903 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 1904 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1905 constructor->obj_field_put(exceptionTypes_offset, value); 1906 } 1907 1908 int java_lang_reflect_Constructor::slot(oop reflect) { 1909 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1910 return reflect->int_field(slot_offset); 1911 } 1912 1913 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 1914 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1915 reflect->int_field_put(slot_offset, value); 1916 } 1917 1918 int java_lang_reflect_Constructor::modifiers(oop constructor) { 1919 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1920 return constructor->int_field(modifiers_offset); 1921 } 1922 1923 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 1924 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1925 constructor->int_field_put(modifiers_offset, value); 1926 } 1927 1928 bool java_lang_reflect_Constructor::has_signature_field() { 1929 return (signature_offset >= 0); 1930 } 1931 1932 oop java_lang_reflect_Constructor::signature(oop constructor) { 1933 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1934 assert(has_signature_field(), "signature field must be present"); 1935 return constructor->obj_field(signature_offset); 1936 } 1937 1938 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 1939 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1940 assert(has_signature_field(), "signature field must be present"); 1941 constructor->obj_field_put(signature_offset, value); 1942 } 1943 1944 bool java_lang_reflect_Constructor::has_annotations_field() { 1945 return (annotations_offset >= 0); 1946 } 1947 1948 oop java_lang_reflect_Constructor::annotations(oop constructor) { 1949 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1950 assert(has_annotations_field(), "annotations field must be present"); 1951 return constructor->obj_field(annotations_offset); 1952 } 1953 1954 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 1955 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1956 assert(has_annotations_field(), "annotations field must be present"); 1957 constructor->obj_field_put(annotations_offset, value); 1958 } 1959 1960 bool java_lang_reflect_Constructor::has_parameter_annotations_field() { 1961 return (parameter_annotations_offset >= 0); 1962 } 1963 1964 oop java_lang_reflect_Constructor::parameter_annotations(oop method) { 1965 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1966 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 1967 return method->obj_field(parameter_annotations_offset); 1968 } 1969 1970 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 1971 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1972 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 1973 method->obj_field_put(parameter_annotations_offset, value); 1974 } 1975 1976 void java_lang_reflect_Field::compute_offsets() { 1977 klassOop k = SystemDictionary::reflect_Field_klass(); 1978 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 1979 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1980 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature()); 1981 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 1982 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 1983 // The generic signature and annotations fields are only present in 1.5 1984 signature_offset = -1; 1985 annotations_offset = -1; 1986 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 1987 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 1988 } 1989 1990 Handle java_lang_reflect_Field::create(TRAPS) { 1991 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1992 Symbol* name = vmSymbols::java_lang_reflect_Field(); 1993 klassOop k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 1994 instanceKlassHandle klass (THREAD, k); 1995 // Ensure it is initialized 1996 klass->initialize(CHECK_NH); 1997 return klass->allocate_instance_handle(CHECK_NH); 1998 } 1999 2000 oop java_lang_reflect_Field::clazz(oop reflect) { 2001 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2002 return reflect->obj_field(clazz_offset); 2003 } 2004 2005 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 2006 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2007 reflect->obj_field_put(clazz_offset, value); 2008 } 2009 2010 oop java_lang_reflect_Field::name(oop field) { 2011 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2012 return field->obj_field(name_offset); 2013 } 2014 2015 void java_lang_reflect_Field::set_name(oop field, oop value) { 2016 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2017 field->obj_field_put(name_offset, value); 2018 } 2019 2020 oop java_lang_reflect_Field::type(oop field) { 2021 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2022 return field->obj_field(type_offset); 2023 } 2024 2025 void java_lang_reflect_Field::set_type(oop field, oop value) { 2026 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2027 field->obj_field_put(type_offset, value); 2028 } 2029 2030 int java_lang_reflect_Field::slot(oop reflect) { 2031 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2032 return reflect->int_field(slot_offset); 2033 } 2034 2035 void java_lang_reflect_Field::set_slot(oop reflect, int value) { 2036 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2037 reflect->int_field_put(slot_offset, value); 2038 } 2039 2040 int java_lang_reflect_Field::modifiers(oop field) { 2041 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2042 return field->int_field(modifiers_offset); 2043 } 2044 2045 void java_lang_reflect_Field::set_modifiers(oop field, int value) { 2046 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2047 field->int_field_put(modifiers_offset, value); 2048 } 2049 2050 bool java_lang_reflect_Field::has_signature_field() { 2051 return (signature_offset >= 0); 2052 } 2053 2054 oop java_lang_reflect_Field::signature(oop field) { 2055 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2056 assert(has_signature_field(), "signature field must be present"); 2057 return field->obj_field(signature_offset); 2058 } 2059 2060 void java_lang_reflect_Field::set_signature(oop field, oop value) { 2061 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2062 assert(has_signature_field(), "signature field must be present"); 2063 field->obj_field_put(signature_offset, value); 2064 } 2065 2066 bool java_lang_reflect_Field::has_annotations_field() { 2067 return (annotations_offset >= 0); 2068 } 2069 2070 oop java_lang_reflect_Field::annotations(oop field) { 2071 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2072 assert(has_annotations_field(), "annotations field must be present"); 2073 return field->obj_field(annotations_offset); 2074 } 2075 2076 void java_lang_reflect_Field::set_annotations(oop field, oop value) { 2077 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2078 assert(has_annotations_field(), "annotations field must be present"); 2079 field->obj_field_put(annotations_offset, value); 2080 } 2081 2082 2083 void sun_reflect_ConstantPool::compute_offsets() { 2084 klassOop k = SystemDictionary::reflect_ConstantPool_klass(); 2085 // This null test can be removed post beta 2086 if (k != NULL) { 2087 compute_offset(_cp_oop_offset, k, vmSymbols::constantPoolOop_name(), vmSymbols::object_signature()); 2088 } 2089 } 2090 2091 2092 Handle sun_reflect_ConstantPool::create(TRAPS) { 2093 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2094 klassOop k = SystemDictionary::reflect_ConstantPool_klass(); 2095 instanceKlassHandle klass (THREAD, k); 2096 // Ensure it is initialized 2097 klass->initialize(CHECK_NH); 2098 return klass->allocate_instance_handle(CHECK_NH); 2099 } 2100 2101 2102 oop sun_reflect_ConstantPool::cp_oop(oop reflect) { 2103 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2104 return reflect->obj_field(_cp_oop_offset); 2105 } 2106 2107 2108 void sun_reflect_ConstantPool::set_cp_oop(oop reflect, oop value) { 2109 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2110 reflect->obj_field_put(_cp_oop_offset, value); 2111 } 2112 2113 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() { 2114 klassOop k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass(); 2115 // This null test can be removed post beta 2116 if (k != NULL) { 2117 compute_offset(_base_offset, k, 2118 vmSymbols::base_name(), vmSymbols::object_signature()); 2119 } 2120 } 2121 2122 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 2123 klassOop k = SystemDictionary::box_klass(type); 2124 if (k == NULL) return NULL; 2125 instanceKlassHandle h (THREAD, k); 2126 if (!h->is_initialized()) h->initialize(CHECK_0); 2127 return h->allocate_instance(THREAD); 2128 } 2129 2130 2131 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 2132 oop box = initialize_and_allocate(type, CHECK_0); 2133 if (box == NULL) return NULL; 2134 switch (type) { 2135 case T_BOOLEAN: 2136 box->bool_field_put(value_offset, value->z); 2137 break; 2138 case T_CHAR: 2139 box->char_field_put(value_offset, value->c); 2140 break; 2141 case T_FLOAT: 2142 box->float_field_put(value_offset, value->f); 2143 break; 2144 case T_DOUBLE: 2145 box->double_field_put(long_value_offset, value->d); 2146 break; 2147 case T_BYTE: 2148 box->byte_field_put(value_offset, value->b); 2149 break; 2150 case T_SHORT: 2151 box->short_field_put(value_offset, value->s); 2152 break; 2153 case T_INT: 2154 box->int_field_put(value_offset, value->i); 2155 break; 2156 case T_LONG: 2157 box->long_field_put(long_value_offset, value->j); 2158 break; 2159 default: 2160 return NULL; 2161 } 2162 return box; 2163 } 2164 2165 2166 BasicType java_lang_boxing_object::basic_type(oop box) { 2167 if (box == NULL) return T_ILLEGAL; 2168 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2169 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 2170 return T_ILLEGAL; 2171 return type; 2172 } 2173 2174 2175 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 2176 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2177 switch (type) { 2178 case T_BOOLEAN: 2179 value->z = box->bool_field(value_offset); 2180 break; 2181 case T_CHAR: 2182 value->c = box->char_field(value_offset); 2183 break; 2184 case T_FLOAT: 2185 value->f = box->float_field(value_offset); 2186 break; 2187 case T_DOUBLE: 2188 value->d = box->double_field(long_value_offset); 2189 break; 2190 case T_BYTE: 2191 value->b = box->byte_field(value_offset); 2192 break; 2193 case T_SHORT: 2194 value->s = box->short_field(value_offset); 2195 break; 2196 case T_INT: 2197 value->i = box->int_field(value_offset); 2198 break; 2199 case T_LONG: 2200 value->j = box->long_field(long_value_offset); 2201 break; 2202 default: 2203 return T_ILLEGAL; 2204 } // end switch 2205 return type; 2206 } 2207 2208 2209 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 2210 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2211 switch (type) { 2212 case T_BOOLEAN: 2213 box->bool_field_put(value_offset, value->z); 2214 break; 2215 case T_CHAR: 2216 box->char_field_put(value_offset, value->c); 2217 break; 2218 case T_FLOAT: 2219 box->float_field_put(value_offset, value->f); 2220 break; 2221 case T_DOUBLE: 2222 box->double_field_put(long_value_offset, value->d); 2223 break; 2224 case T_BYTE: 2225 box->byte_field_put(value_offset, value->b); 2226 break; 2227 case T_SHORT: 2228 box->short_field_put(value_offset, value->s); 2229 break; 2230 case T_INT: 2231 box->int_field_put(value_offset, value->i); 2232 break; 2233 case T_LONG: 2234 box->long_field_put(long_value_offset, value->j); 2235 break; 2236 default: 2237 return T_ILLEGAL; 2238 } // end switch 2239 return type; 2240 } 2241 2242 2243 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) { 2244 switch (type) { 2245 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break; 2246 case T_CHAR: st->print("%d", value->c); break; 2247 case T_BYTE: st->print("%d", value->b); break; 2248 case T_SHORT: st->print("%d", value->s); break; 2249 case T_INT: st->print("%d", value->i); break; 2250 case T_LONG: st->print(INT64_FORMAT, value->j); break; 2251 case T_FLOAT: st->print("%f", value->f); break; 2252 case T_DOUBLE: st->print("%lf", value->d); break; 2253 default: st->print("type %d?", type); break; 2254 } 2255 } 2256 2257 2258 // Support for java_lang_ref_Reference 2259 oop java_lang_ref_Reference::pending_list_lock() { 2260 instanceKlass* ik = instanceKlass::cast(SystemDictionary::Reference_klass()); 2261 address addr = ik->static_field_addr(static_lock_offset); 2262 if (UseCompressedOops) { 2263 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 2264 } else { 2265 return oopDesc::load_decode_heap_oop((oop*)addr); 2266 } 2267 } 2268 2269 HeapWord *java_lang_ref_Reference::pending_list_addr() { 2270 instanceKlass* ik = instanceKlass::cast(SystemDictionary::Reference_klass()); 2271 address addr = ik->static_field_addr(static_pending_offset); 2272 // XXX This might not be HeapWord aligned, almost rather be char *. 2273 return (HeapWord*)addr; 2274 } 2275 2276 oop java_lang_ref_Reference::pending_list() { 2277 char *addr = (char *)pending_list_addr(); 2278 if (UseCompressedOops) { 2279 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 2280 } else { 2281 return oopDesc::load_decode_heap_oop((oop*)addr); 2282 } 2283 } 2284 2285 2286 // Support for java_lang_ref_SoftReference 2287 2288 jlong java_lang_ref_SoftReference::timestamp(oop ref) { 2289 return ref->long_field(timestamp_offset); 2290 } 2291 2292 jlong java_lang_ref_SoftReference::clock() { 2293 instanceKlass* ik = instanceKlass::cast(SystemDictionary::SoftReference_klass()); 2294 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset); 2295 return *offset; 2296 } 2297 2298 void java_lang_ref_SoftReference::set_clock(jlong value) { 2299 instanceKlass* ik = instanceKlass::cast(SystemDictionary::SoftReference_klass()); 2300 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset); 2301 *offset = value; 2302 } 2303 2304 2305 // Support for java_lang_invoke_MethodHandle 2306 2307 int java_lang_invoke_MethodHandle::_type_offset; 2308 int java_lang_invoke_MethodHandle::_vmtarget_offset; 2309 int java_lang_invoke_MethodHandle::_vmentry_offset; 2310 int java_lang_invoke_MethodHandle::_vmslots_offset; 2311 2312 int java_lang_invoke_MemberName::_clazz_offset; 2313 int java_lang_invoke_MemberName::_name_offset; 2314 int java_lang_invoke_MemberName::_type_offset; 2315 int java_lang_invoke_MemberName::_flags_offset; 2316 int java_lang_invoke_MemberName::_vmtarget_offset; 2317 int java_lang_invoke_MemberName::_vmindex_offset; 2318 2319 int java_lang_invoke_DirectMethodHandle::_vmindex_offset; 2320 2321 int java_lang_invoke_BoundMethodHandle::_argument_offset; 2322 int java_lang_invoke_BoundMethodHandle::_vmargslot_offset; 2323 2324 int java_lang_invoke_AdapterMethodHandle::_conversion_offset; 2325 2326 void java_lang_invoke_MethodHandle::compute_offsets() { 2327 klassOop k = SystemDictionary::MethodHandle_klass(); 2328 if (k != NULL && EnableInvokeDynamic) { 2329 bool allow_super = false; 2330 compute_offset(_type_offset, k, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature(), allow_super); 2331 compute_offset(_vmtarget_offset, k, vmSymbols::vmtarget_name(), vmSymbols::object_signature(), allow_super); 2332 compute_offset(_vmentry_offset, k, vmSymbols::vmentry_name(), vmSymbols::machine_word_signature(), allow_super); 2333 2334 // Note: MH.vmslots (if it is present) is a hoisted copy of MH.type.form.vmslots. 2335 // It is optional pending experiments to keep or toss. 2336 compute_optional_offset(_vmslots_offset, k, vmSymbols::vmslots_name(), vmSymbols::int_signature(), allow_super); 2337 } 2338 } 2339 2340 void java_lang_invoke_MemberName::compute_offsets() { 2341 klassOop k = SystemDictionary::MemberName_klass(); 2342 if (k != NULL && EnableInvokeDynamic) { 2343 compute_offset(_clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2344 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2345 compute_offset(_type_offset, k, vmSymbols::type_name(), vmSymbols::object_signature()); 2346 compute_offset(_flags_offset, k, vmSymbols::flags_name(), vmSymbols::int_signature()); 2347 compute_offset(_vmtarget_offset, k, vmSymbols::vmtarget_name(), vmSymbols::object_signature()); 2348 compute_offset(_vmindex_offset, k, vmSymbols::vmindex_name(), vmSymbols::int_signature()); 2349 } 2350 } 2351 2352 void java_lang_invoke_DirectMethodHandle::compute_offsets() { 2353 klassOop k = SystemDictionary::DirectMethodHandle_klass(); 2354 if (k != NULL && EnableInvokeDynamic) { 2355 compute_offset(_vmindex_offset, k, vmSymbols::vmindex_name(), vmSymbols::int_signature(), true); 2356 } 2357 } 2358 2359 void java_lang_invoke_BoundMethodHandle::compute_offsets() { 2360 klassOop k = SystemDictionary::BoundMethodHandle_klass(); 2361 if (k != NULL && EnableInvokeDynamic) { 2362 compute_offset(_vmargslot_offset, k, vmSymbols::vmargslot_name(), vmSymbols::int_signature(), true); 2363 compute_offset(_argument_offset, k, vmSymbols::argument_name(), vmSymbols::object_signature(), true); 2364 } 2365 } 2366 2367 void java_lang_invoke_AdapterMethodHandle::compute_offsets() { 2368 klassOop k = SystemDictionary::AdapterMethodHandle_klass(); 2369 if (k != NULL && EnableInvokeDynamic) { 2370 compute_offset(_conversion_offset, k, vmSymbols::conversion_name(), vmSymbols::int_signature(), true); 2371 } 2372 } 2373 2374 oop java_lang_invoke_MethodHandle::type(oop mh) { 2375 return mh->obj_field(_type_offset); 2376 } 2377 2378 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) { 2379 mh->obj_field_put(_type_offset, mtype); 2380 } 2381 2382 int java_lang_invoke_MethodHandle::vmslots(oop mh) { 2383 int vmslots_offset = _vmslots_offset; 2384 if (vmslots_offset != 0) { 2385 #ifdef ASSERT 2386 int x = mh->int_field(vmslots_offset); 2387 int y = compute_vmslots(mh); 2388 assert(x == y, "correct hoisted value"); 2389 #endif 2390 return mh->int_field(vmslots_offset); 2391 } else { 2392 return compute_vmslots(mh); 2393 } 2394 } 2395 2396 // if MH.vmslots exists, hoist into it the value of type.form.vmslots 2397 void java_lang_invoke_MethodHandle::init_vmslots(oop mh) { 2398 int vmslots_offset = _vmslots_offset; 2399 if (vmslots_offset != 0) { 2400 mh->int_field_put(vmslots_offset, compute_vmslots(mh)); 2401 } 2402 } 2403 2404 // fetch type.form.vmslots, which is the number of JVM stack slots 2405 // required to carry the arguments of this MH 2406 int java_lang_invoke_MethodHandle::compute_vmslots(oop mh) { 2407 oop mtype = type(mh); 2408 if (mtype == NULL) return 0; // Java code would get NPE 2409 oop form = java_lang_invoke_MethodType::form(mtype); 2410 if (form == NULL) return 0; // Java code would get NPE 2411 return java_lang_invoke_MethodTypeForm::vmslots(form); 2412 } 2413 2414 // fetch the low-level entry point for this mh 2415 MethodHandleEntry* java_lang_invoke_MethodHandle::vmentry(oop mh) { 2416 return (MethodHandleEntry*) mh->address_field(_vmentry_offset); 2417 } 2418 2419 void java_lang_invoke_MethodHandle::set_vmentry(oop mh, MethodHandleEntry* me) { 2420 assert(_vmentry_offset != 0, "must be present"); 2421 2422 // This is always the final step that initializes a valid method handle: 2423 mh->release_address_field_put(_vmentry_offset, (address) me); 2424 2425 // There should be enough memory barriers on exit from native methods 2426 // to ensure that the MH is fully initialized to all threads before 2427 // Java code can publish it in global data structures. 2428 // But just in case, we use release_address_field_put. 2429 } 2430 2431 /// MemberName accessors 2432 2433 oop java_lang_invoke_MemberName::clazz(oop mname) { 2434 assert(is_instance(mname), "wrong type"); 2435 return mname->obj_field(_clazz_offset); 2436 } 2437 2438 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) { 2439 assert(is_instance(mname), "wrong type"); 2440 mname->obj_field_put(_clazz_offset, clazz); 2441 } 2442 2443 oop java_lang_invoke_MemberName::name(oop mname) { 2444 assert(is_instance(mname), "wrong type"); 2445 return mname->obj_field(_name_offset); 2446 } 2447 2448 void java_lang_invoke_MemberName::set_name(oop mname, oop name) { 2449 assert(is_instance(mname), "wrong type"); 2450 mname->obj_field_put(_name_offset, name); 2451 } 2452 2453 oop java_lang_invoke_MemberName::type(oop mname) { 2454 assert(is_instance(mname), "wrong type"); 2455 return mname->obj_field(_type_offset); 2456 } 2457 2458 void java_lang_invoke_MemberName::set_type(oop mname, oop type) { 2459 assert(is_instance(mname), "wrong type"); 2460 mname->obj_field_put(_type_offset, type); 2461 } 2462 2463 int java_lang_invoke_MemberName::flags(oop mname) { 2464 assert(is_instance(mname), "wrong type"); 2465 return mname->int_field(_flags_offset); 2466 } 2467 2468 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) { 2469 assert(is_instance(mname), "wrong type"); 2470 mname->int_field_put(_flags_offset, flags); 2471 } 2472 2473 oop java_lang_invoke_MemberName::vmtarget(oop mname) { 2474 assert(is_instance(mname), "wrong type"); 2475 return mname->obj_field(_vmtarget_offset); 2476 } 2477 2478 void java_lang_invoke_MemberName::set_vmtarget(oop mname, oop ref) { 2479 assert(is_instance(mname), "wrong type"); 2480 mname->obj_field_put(_vmtarget_offset, ref); 2481 } 2482 2483 int java_lang_invoke_MemberName::vmindex(oop mname) { 2484 assert(is_instance(mname), "wrong type"); 2485 return mname->int_field(_vmindex_offset); 2486 } 2487 2488 void java_lang_invoke_MemberName::set_vmindex(oop mname, int index) { 2489 assert(is_instance(mname), "wrong type"); 2490 mname->int_field_put(_vmindex_offset, index); 2491 } 2492 2493 oop java_lang_invoke_MethodHandle::vmtarget(oop mh) { 2494 assert(is_instance(mh), "MH only"); 2495 return mh->obj_field(_vmtarget_offset); 2496 } 2497 2498 void java_lang_invoke_MethodHandle::set_vmtarget(oop mh, oop ref) { 2499 assert(is_instance(mh), "MH only"); 2500 mh->obj_field_put(_vmtarget_offset, ref); 2501 } 2502 2503 int java_lang_invoke_DirectMethodHandle::vmindex(oop mh) { 2504 assert(is_instance(mh), "DMH only"); 2505 return mh->int_field(_vmindex_offset); 2506 } 2507 2508 void java_lang_invoke_DirectMethodHandle::set_vmindex(oop mh, int index) { 2509 assert(is_instance(mh), "DMH only"); 2510 mh->int_field_put(_vmindex_offset, index); 2511 } 2512 2513 int java_lang_invoke_BoundMethodHandle::vmargslot(oop mh) { 2514 assert(is_instance(mh), "BMH only"); 2515 return mh->int_field(_vmargslot_offset); 2516 } 2517 2518 oop java_lang_invoke_BoundMethodHandle::argument(oop mh) { 2519 assert(is_instance(mh), "BMH only"); 2520 return mh->obj_field(_argument_offset); 2521 } 2522 2523 int java_lang_invoke_AdapterMethodHandle::conversion(oop mh) { 2524 assert(is_instance(mh), "AMH only"); 2525 return mh->int_field(_conversion_offset); 2526 } 2527 2528 void java_lang_invoke_AdapterMethodHandle::set_conversion(oop mh, int conv) { 2529 assert(is_instance(mh), "AMH only"); 2530 mh->int_field_put(_conversion_offset, conv); 2531 } 2532 2533 2534 // Support for java_lang_invoke_MethodType 2535 2536 int java_lang_invoke_MethodType::_rtype_offset; 2537 int java_lang_invoke_MethodType::_ptypes_offset; 2538 int java_lang_invoke_MethodType::_form_offset; 2539 2540 void java_lang_invoke_MethodType::compute_offsets() { 2541 klassOop k = SystemDictionary::MethodType_klass(); 2542 if (k != NULL) { 2543 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature()); 2544 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature()); 2545 compute_offset(_form_offset, k, vmSymbols::form_name(), vmSymbols::java_lang_invoke_MethodTypeForm_signature()); 2546 } 2547 } 2548 2549 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) { 2550 st->print("("); 2551 objArrayOop pts = ptypes(mt); 2552 for (int i = 0, limit = pts->length(); i < limit; i++) { 2553 java_lang_Class::print_signature(pts->obj_at(i), st); 2554 } 2555 st->print(")"); 2556 java_lang_Class::print_signature(rtype(mt), st); 2557 } 2558 2559 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) { 2560 ResourceMark rm; 2561 stringStream buffer(128); 2562 print_signature(mt, &buffer); 2563 const char* sigstr = buffer.base(); 2564 int siglen = (int) buffer.size(); 2565 Symbol *name; 2566 if (!intern_if_not_found) { 2567 name = SymbolTable::probe(sigstr, siglen); 2568 } else { 2569 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 2570 } 2571 return name; 2572 } 2573 2574 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) { 2575 if (rtype(mt1) != rtype(mt2)) 2576 return false; 2577 if (ptype_count(mt1) != ptype_count(mt2)) 2578 return false; 2579 for (int i = ptype_count(mt1) - 1; i >= 0; i--) { 2580 if (ptype(mt1, i) != ptype(mt2, i)) 2581 return false; 2582 } 2583 return true; 2584 } 2585 2586 oop java_lang_invoke_MethodType::rtype(oop mt) { 2587 assert(is_instance(mt), "must be a MethodType"); 2588 return mt->obj_field(_rtype_offset); 2589 } 2590 2591 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) { 2592 assert(is_instance(mt), "must be a MethodType"); 2593 return (objArrayOop) mt->obj_field(_ptypes_offset); 2594 } 2595 2596 oop java_lang_invoke_MethodType::form(oop mt) { 2597 assert(is_instance(mt), "must be a MethodType"); 2598 return mt->obj_field(_form_offset); 2599 } 2600 2601 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) { 2602 return ptypes(mt)->obj_at(idx); 2603 } 2604 2605 int java_lang_invoke_MethodType::ptype_count(oop mt) { 2606 return ptypes(mt)->length(); 2607 } 2608 2609 2610 2611 // Support for java_lang_invoke_MethodTypeForm 2612 2613 int java_lang_invoke_MethodTypeForm::_vmslots_offset; 2614 int java_lang_invoke_MethodTypeForm::_vmlayout_offset; 2615 int java_lang_invoke_MethodTypeForm::_erasedType_offset; 2616 int java_lang_invoke_MethodTypeForm::_genericInvoker_offset; 2617 2618 void java_lang_invoke_MethodTypeForm::compute_offsets() { 2619 klassOop k = SystemDictionary::MethodTypeForm_klass(); 2620 if (k != NULL) { 2621 compute_optional_offset(_vmslots_offset, k, vmSymbols::vmslots_name(), vmSymbols::int_signature(), true); 2622 compute_optional_offset(_vmlayout_offset, k, vmSymbols::vmlayout_name(), vmSymbols::object_signature()); 2623 compute_optional_offset(_erasedType_offset, k, vmSymbols::erasedType_name(), vmSymbols::java_lang_invoke_MethodType_signature(), true); 2624 compute_optional_offset(_genericInvoker_offset, k, vmSymbols::genericInvoker_name(), vmSymbols::java_lang_invoke_MethodHandle_signature(), true); 2625 if (_genericInvoker_offset == 0) _genericInvoker_offset = -1; // set to explicit "empty" value 2626 } 2627 } 2628 2629 int java_lang_invoke_MethodTypeForm::vmslots(oop mtform) { 2630 assert(mtform->klass() == SystemDictionary::MethodTypeForm_klass(), "MTForm only"); 2631 assert(_vmslots_offset > 0, ""); 2632 return mtform->int_field(_vmslots_offset); 2633 } 2634 2635 oop java_lang_invoke_MethodTypeForm::vmlayout(oop mtform) { 2636 assert(mtform->klass() == SystemDictionary::MethodTypeForm_klass(), "MTForm only"); 2637 assert(_vmlayout_offset > 0, ""); 2638 return mtform->obj_field(_vmlayout_offset); 2639 } 2640 2641 oop java_lang_invoke_MethodTypeForm::init_vmlayout(oop mtform, oop cookie) { 2642 assert(mtform->klass() == SystemDictionary::MethodTypeForm_klass(), "MTForm only"); 2643 oop previous = vmlayout(mtform); 2644 if (previous != NULL) { 2645 return previous; // someone else beat us to it 2646 } 2647 HeapWord* cookie_addr = (HeapWord*) mtform->obj_field_addr<oop>(_vmlayout_offset); 2648 OrderAccess::storestore(); // make sure our copy is fully committed 2649 previous = oopDesc::atomic_compare_exchange_oop(cookie, cookie_addr, previous); 2650 if (previous != NULL) { 2651 return previous; // someone else beat us to it 2652 } 2653 return cookie; 2654 } 2655 2656 oop java_lang_invoke_MethodTypeForm::erasedType(oop mtform) { 2657 assert(mtform->klass() == SystemDictionary::MethodTypeForm_klass(), "MTForm only"); 2658 return mtform->obj_field(_erasedType_offset); 2659 } 2660 2661 oop java_lang_invoke_MethodTypeForm::genericInvoker(oop mtform) { 2662 assert(mtform->klass() == SystemDictionary::MethodTypeForm_klass(), "MTForm only"); 2663 return mtform->obj_field(_genericInvoker_offset); 2664 } 2665 2666 2667 // Support for java_lang_invoke_CallSite 2668 2669 int java_lang_invoke_CallSite::_target_offset; 2670 2671 void java_lang_invoke_CallSite::compute_offsets() { 2672 if (!EnableInvokeDynamic) return; 2673 klassOop k = SystemDictionary::CallSite_klass(); 2674 if (k != NULL) { 2675 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature()); 2676 } 2677 } 2678 2679 oop java_lang_invoke_CallSite::target(oop site) { 2680 return site->obj_field(_target_offset); 2681 } 2682 2683 void java_lang_invoke_CallSite::set_target(oop site, oop target) { 2684 site->obj_field_put(_target_offset, target); 2685 } 2686 2687 2688 // Support for java_security_AccessControlContext 2689 2690 int java_security_AccessControlContext::_context_offset = 0; 2691 int java_security_AccessControlContext::_privilegedContext_offset = 0; 2692 int java_security_AccessControlContext::_isPrivileged_offset = 0; 2693 2694 void java_security_AccessControlContext::compute_offsets() { 2695 assert(_isPrivileged_offset == 0, "offsets should be initialized only once"); 2696 fieldDescriptor fd; 2697 instanceKlass* ik = instanceKlass::cast(SystemDictionary::AccessControlContext_klass()); 2698 2699 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) { 2700 fatal("Invalid layout of java.security.AccessControlContext"); 2701 } 2702 _context_offset = fd.offset(); 2703 2704 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) { 2705 fatal("Invalid layout of java.security.AccessControlContext"); 2706 } 2707 _privilegedContext_offset = fd.offset(); 2708 2709 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) { 2710 fatal("Invalid layout of java.security.AccessControlContext"); 2711 } 2712 _isPrivileged_offset = fd.offset(); 2713 } 2714 2715 2716 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) { 2717 assert(_isPrivileged_offset != 0, "offsets should have been initialized"); 2718 // Ensure klass is initialized 2719 instanceKlass::cast(SystemDictionary::AccessControlContext_klass())->initialize(CHECK_0); 2720 // Allocate result 2721 oop result = instanceKlass::cast(SystemDictionary::AccessControlContext_klass())->allocate_instance(CHECK_0); 2722 // Fill in values 2723 result->obj_field_put(_context_offset, context()); 2724 result->obj_field_put(_privilegedContext_offset, privileged_context()); 2725 result->bool_field_put(_isPrivileged_offset, isPrivileged); 2726 return result; 2727 } 2728 2729 2730 // Support for java_lang_ClassLoader 2731 2732 oop java_lang_ClassLoader::parent(oop loader) { 2733 assert(loader->is_oop(), "loader must be oop"); 2734 return loader->obj_field(parent_offset); 2735 } 2736 2737 2738 bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 2739 // Fix for 4474172; see evaluation for more details 2740 loader = non_reflection_class_loader(loader); 2741 2742 oop cl = SystemDictionary::java_system_loader(); 2743 while(cl != NULL) { 2744 if (cl == loader) return true; 2745 cl = parent(cl); 2746 } 2747 return false; 2748 } 2749 2750 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) { 2751 if (loader != NULL) { 2752 // See whether this is one of the class loaders associated with 2753 // the generated bytecodes for reflection, and if so, "magically" 2754 // delegate to its parent to prevent class loading from occurring 2755 // in places where applications using reflection didn't expect it. 2756 klassOop delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass(); 2757 // This might be null in non-1.4 JDKs 2758 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) { 2759 return parent(loader); 2760 } 2761 } 2762 return loader; 2763 } 2764 2765 2766 // Support for java_lang_System 2767 int java_lang_System::in_offset_in_bytes() { 2768 return (instanceMirrorKlass::offset_of_static_fields() + static_in_offset); 2769 } 2770 2771 2772 int java_lang_System::out_offset_in_bytes() { 2773 return (instanceMirrorKlass::offset_of_static_fields() + static_out_offset); 2774 } 2775 2776 2777 int java_lang_System::err_offset_in_bytes() { 2778 return (instanceMirrorKlass::offset_of_static_fields() + static_err_offset); 2779 } 2780 2781 2782 2783 int java_lang_String::value_offset; 2784 int java_lang_String::offset_offset; 2785 int java_lang_String::count_offset; 2786 int java_lang_String::hash_offset; 2787 int java_lang_Class::klass_offset; 2788 int java_lang_Class::array_klass_offset; 2789 int java_lang_Class::resolved_constructor_offset; 2790 int java_lang_Class::number_of_fake_oop_fields; 2791 int java_lang_Class::oop_size_offset; 2792 int java_lang_Class::static_oop_field_count_offset; 2793 int java_lang_Throwable::backtrace_offset; 2794 int java_lang_Throwable::detailMessage_offset; 2795 int java_lang_Throwable::cause_offset; 2796 int java_lang_Throwable::stackTrace_offset; 2797 int java_lang_Throwable::static_unassigned_stacktrace_offset; 2798 int java_lang_reflect_AccessibleObject::override_offset; 2799 int java_lang_reflect_Method::clazz_offset; 2800 int java_lang_reflect_Method::name_offset; 2801 int java_lang_reflect_Method::returnType_offset; 2802 int java_lang_reflect_Method::parameterTypes_offset; 2803 int java_lang_reflect_Method::exceptionTypes_offset; 2804 int java_lang_reflect_Method::slot_offset; 2805 int java_lang_reflect_Method::modifiers_offset; 2806 int java_lang_reflect_Method::signature_offset; 2807 int java_lang_reflect_Method::annotations_offset; 2808 int java_lang_reflect_Method::parameter_annotations_offset; 2809 int java_lang_reflect_Method::annotation_default_offset; 2810 int java_lang_reflect_Constructor::clazz_offset; 2811 int java_lang_reflect_Constructor::parameterTypes_offset; 2812 int java_lang_reflect_Constructor::exceptionTypes_offset; 2813 int java_lang_reflect_Constructor::slot_offset; 2814 int java_lang_reflect_Constructor::modifiers_offset; 2815 int java_lang_reflect_Constructor::signature_offset; 2816 int java_lang_reflect_Constructor::annotations_offset; 2817 int java_lang_reflect_Constructor::parameter_annotations_offset; 2818 int java_lang_reflect_Field::clazz_offset; 2819 int java_lang_reflect_Field::name_offset; 2820 int java_lang_reflect_Field::type_offset; 2821 int java_lang_reflect_Field::slot_offset; 2822 int java_lang_reflect_Field::modifiers_offset; 2823 int java_lang_reflect_Field::signature_offset; 2824 int java_lang_reflect_Field::annotations_offset; 2825 int java_lang_boxing_object::value_offset; 2826 int java_lang_boxing_object::long_value_offset; 2827 int java_lang_ref_Reference::referent_offset; 2828 int java_lang_ref_Reference::queue_offset; 2829 int java_lang_ref_Reference::next_offset; 2830 int java_lang_ref_Reference::discovered_offset; 2831 int java_lang_ref_Reference::static_lock_offset; 2832 int java_lang_ref_Reference::static_pending_offset; 2833 int java_lang_ref_Reference::number_of_fake_oop_fields; 2834 int java_lang_ref_SoftReference::timestamp_offset; 2835 int java_lang_ref_SoftReference::static_clock_offset; 2836 int java_lang_ClassLoader::parent_offset; 2837 int java_lang_System::static_in_offset; 2838 int java_lang_System::static_out_offset; 2839 int java_lang_System::static_err_offset; 2840 int java_lang_StackTraceElement::declaringClass_offset; 2841 int java_lang_StackTraceElement::methodName_offset; 2842 int java_lang_StackTraceElement::fileName_offset; 2843 int java_lang_StackTraceElement::lineNumber_offset; 2844 int java_lang_AssertionStatusDirectives::classes_offset; 2845 int java_lang_AssertionStatusDirectives::classEnabled_offset; 2846 int java_lang_AssertionStatusDirectives::packages_offset; 2847 int java_lang_AssertionStatusDirectives::packageEnabled_offset; 2848 int java_lang_AssertionStatusDirectives::deflt_offset; 2849 int java_nio_Buffer::_limit_offset; 2850 int sun_misc_AtomicLongCSImpl::_value_offset; 2851 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0; 2852 int sun_reflect_ConstantPool::_cp_oop_offset; 2853 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset; 2854 2855 2856 // Support for java_lang_StackTraceElement 2857 2858 void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 2859 element->obj_field_put(fileName_offset, value); 2860 } 2861 2862 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 2863 element->obj_field_put(declaringClass_offset, value); 2864 } 2865 2866 void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 2867 element->obj_field_put(methodName_offset, value); 2868 } 2869 2870 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 2871 element->int_field_put(lineNumber_offset, value); 2872 } 2873 2874 2875 // Support for java Assertions - java_lang_AssertionStatusDirectives. 2876 2877 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 2878 o->obj_field_put(classes_offset, val); 2879 } 2880 2881 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 2882 o->obj_field_put(classEnabled_offset, val); 2883 } 2884 2885 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 2886 o->obj_field_put(packages_offset, val); 2887 } 2888 2889 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 2890 o->obj_field_put(packageEnabled_offset, val); 2891 } 2892 2893 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 2894 o->bool_field_put(deflt_offset, val); 2895 } 2896 2897 2898 // Support for intrinsification of java.nio.Buffer.checkIndex 2899 int java_nio_Buffer::limit_offset() { 2900 return _limit_offset; 2901 } 2902 2903 2904 void java_nio_Buffer::compute_offsets() { 2905 klassOop k = SystemDictionary::java_nio_Buffer_klass(); 2906 assert(k != NULL, "must be loaded in 1.4+"); 2907 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature()); 2908 } 2909 2910 // Support for intrinsification of sun.misc.AtomicLongCSImpl.attemptUpdate 2911 int sun_misc_AtomicLongCSImpl::value_offset() { 2912 assert(SystemDictionary::sun_misc_AtomicLongCSImpl_klass() != NULL, "can't call this"); 2913 return _value_offset; 2914 } 2915 2916 2917 void sun_misc_AtomicLongCSImpl::compute_offsets() { 2918 klassOop k = SystemDictionary::sun_misc_AtomicLongCSImpl_klass(); 2919 // If this class is not present, its value field offset won't be referenced. 2920 if (k != NULL) { 2921 compute_offset(_value_offset, k, vmSymbols::value_name(), vmSymbols::long_signature()); 2922 } 2923 } 2924 2925 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) { 2926 if (_owner_offset != 0) return; 2927 2928 assert(JDK_Version::is_gte_jdk16x_version(), "Must be JDK 1.6 or later"); 2929 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK); 2930 klassOop k = SystemDictionary::abstract_ownable_synchronizer_klass(); 2931 compute_offset(_owner_offset, k, 2932 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature()); 2933 } 2934 2935 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 2936 assert(_owner_offset != 0, "Must be initialized"); 2937 return obj->obj_field(_owner_offset); 2938 } 2939 2940 // Compute hard-coded offsets 2941 // Invoked before SystemDictionary::initialize, so pre-loaded classes 2942 // are not available to determine the offset_of_static_fields. 2943 void JavaClasses::compute_hard_coded_offsets() { 2944 const int x = heapOopSize; 2945 const int header = instanceOopDesc::base_offset_in_bytes(); 2946 2947 // Do the String Class 2948 java_lang_String::value_offset = java_lang_String::hc_value_offset * x + header; 2949 java_lang_String::offset_offset = java_lang_String::hc_offset_offset * x + header; 2950 java_lang_String::count_offset = java_lang_String::offset_offset + sizeof (jint); 2951 java_lang_String::hash_offset = java_lang_String::count_offset + sizeof (jint); 2952 2953 { 2954 // Do the Class Class 2955 int offset = header; 2956 java_lang_Class::oop_size_offset = header; 2957 offset += BytesPerInt; 2958 java_lang_Class::static_oop_field_count_offset = offset; 2959 offset = align_size_up(offset + BytesPerInt, x); 2960 java_lang_Class::klass_offset = offset; 2961 offset += x; 2962 java_lang_Class::array_klass_offset = offset; 2963 offset += x; 2964 java_lang_Class::resolved_constructor_offset = offset; 2965 } 2966 2967 // This is NOT an offset 2968 java_lang_Class::number_of_fake_oop_fields = java_lang_Class::hc_number_of_fake_oop_fields; 2969 2970 // Throwable Class 2971 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header; 2972 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header; 2973 java_lang_Throwable::cause_offset = java_lang_Throwable::hc_cause_offset * x + header; 2974 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header; 2975 java_lang_Throwable::static_unassigned_stacktrace_offset = java_lang_Throwable::hc_static_unassigned_stacktrace_offset * x; 2976 2977 // java_lang_boxing_object 2978 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header; 2979 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong); 2980 2981 // java_lang_ref_Reference: 2982 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header; 2983 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header; 2984 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header; 2985 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header; 2986 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x; 2987 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x; 2988 // Artificial fields for java_lang_ref_Reference 2989 // The first field is for the discovered field added in 1.4 2990 java_lang_ref_Reference::number_of_fake_oop_fields = 1; 2991 2992 // java_lang_ref_SoftReference Class 2993 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong); 2994 // Don't multiply static fields because they are always in wordSize units 2995 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x; 2996 2997 // java_lang_ClassLoader 2998 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header; 2999 3000 // java_lang_System 3001 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x; 3002 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x; 3003 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x; 3004 3005 // java_lang_StackTraceElement 3006 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header; 3007 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header; 3008 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header; 3009 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header; 3010 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header; 3011 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header; 3012 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header; 3013 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header; 3014 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header; 3015 3016 } 3017 3018 3019 // Compute non-hard-coded field offsets of all the classes in this file 3020 void JavaClasses::compute_offsets() { 3021 3022 java_lang_Class::compute_offsets(); 3023 java_lang_Thread::compute_offsets(); 3024 java_lang_ThreadGroup::compute_offsets(); 3025 if (EnableInvokeDynamic) { 3026 java_lang_invoke_MethodHandle::compute_offsets(); 3027 java_lang_invoke_MemberName::compute_offsets(); 3028 java_lang_invoke_DirectMethodHandle::compute_offsets(); 3029 java_lang_invoke_BoundMethodHandle::compute_offsets(); 3030 java_lang_invoke_AdapterMethodHandle::compute_offsets(); 3031 java_lang_invoke_MethodType::compute_offsets(); 3032 java_lang_invoke_MethodTypeForm::compute_offsets(); 3033 java_lang_invoke_CallSite::compute_offsets(); 3034 } 3035 java_security_AccessControlContext::compute_offsets(); 3036 // Initialize reflection classes. The layouts of these classes 3037 // changed with the new reflection implementation in JDK 1.4, and 3038 // since the Universe doesn't know what JDK version it is until this 3039 // point we defer computation of these offsets until now. 3040 java_lang_reflect_AccessibleObject::compute_offsets(); 3041 java_lang_reflect_Method::compute_offsets(); 3042 java_lang_reflect_Constructor::compute_offsets(); 3043 java_lang_reflect_Field::compute_offsets(); 3044 if (JDK_Version::is_gte_jdk14x_version()) { 3045 java_nio_Buffer::compute_offsets(); 3046 } 3047 if (JDK_Version::is_gte_jdk15x_version()) { 3048 sun_reflect_ConstantPool::compute_offsets(); 3049 sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets(); 3050 } 3051 sun_misc_AtomicLongCSImpl::compute_offsets(); 3052 3053 // generated interpreter code wants to know about the offsets we just computed: 3054 AbstractAssembler::update_delayed_values(); 3055 } 3056 3057 #ifndef PRODUCT 3058 3059 // These functions exist to assert the validity of hard-coded field offsets to guard 3060 // against changes in the class files 3061 3062 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 3063 EXCEPTION_MARK; 3064 fieldDescriptor fd; 3065 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3066 klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3067 instanceKlassHandle h_klass (THREAD, k); 3068 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3069 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3070 if (!h_klass->find_local_field(f_name, f_sig, &fd)) { 3071 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 3072 return false; 3073 } 3074 if (fd.is_static()) { 3075 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 3076 return false; 3077 } 3078 if (fd.offset() == hardcoded_offset ) { 3079 return true; 3080 } else { 3081 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.", 3082 klass_name, field_name, hardcoded_offset, fd.offset()); 3083 return false; 3084 } 3085 } 3086 3087 3088 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 3089 EXCEPTION_MARK; 3090 fieldDescriptor fd; 3091 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3092 klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3093 instanceKlassHandle h_klass (THREAD, k); 3094 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3095 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3096 if (!h_klass->find_local_field(f_name, f_sig, &fd)) { 3097 tty->print_cr("Static field %s.%s not found", klass_name, field_name); 3098 return false; 3099 } 3100 if (!fd.is_static()) { 3101 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name); 3102 return false; 3103 } 3104 if (fd.offset() == hardcoded_offset + instanceMirrorKlass::offset_of_static_fields()) { 3105 return true; 3106 } else { 3107 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() - instanceMirrorKlass::offset_of_static_fields()); 3108 return false; 3109 } 3110 } 3111 3112 3113 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) { 3114 EXCEPTION_MARK; 3115 fieldDescriptor fd; 3116 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3117 klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3118 instanceKlassHandle h_klass (THREAD, k); 3119 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3120 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3121 if (!h_klass->find_local_field(f_name, f_sig, &fd)) { 3122 tty->print_cr("Static field %s.%s not found", klass_name, field_name); 3123 return false; 3124 } 3125 if (!fd.is_static() || !fd.has_initial_value()) { 3126 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name); 3127 return false; 3128 } 3129 if (!fd.initial_value_tag().is_int()) { 3130 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name); 3131 return false; 3132 } 3133 jint field_value = fd.int_initial_value(); 3134 if (field_value == hardcoded_constant) { 3135 return true; 3136 } else { 3137 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); 3138 return false; 3139 } 3140 } 3141 3142 3143 // Check the hard-coded field offsets of all the classes in this file 3144 3145 void JavaClasses::check_offsets() { 3146 bool valid = true; 3147 3148 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3149 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig) 3150 3151 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3152 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig) 3153 3154 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3155 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig) 3156 3157 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \ 3158 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig) 3159 3160 // java.lang.String 3161 3162 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C"); 3163 CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I"); 3164 CHECK_OFFSET("java/lang/String", java_lang_String, count, "I"); 3165 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I"); 3166 3167 // java.lang.Class 3168 3169 // Fake fields 3170 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked 3171 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked 3172 // CHECK_OFFSET("java/lang/Class", java_lang_Class, resolved_constructor); // %%% this needs to be checked 3173 3174 // java.lang.Throwable 3175 3176 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;"); 3177 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;"); 3178 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;"); 3179 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;"); 3180 3181 // Boxed primitive objects (java_lang_boxing_object) 3182 3183 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 3184 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 3185 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 3186 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 3187 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 3188 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 3189 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 3190 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 3191 3192 // java.lang.ClassLoader 3193 3194 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;"); 3195 3196 // java.lang.System 3197 3198 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;"); 3199 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;"); 3200 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;"); 3201 3202 // java.lang.StackTraceElement 3203 3204 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;"); 3205 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;"); 3206 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;"); 3207 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I"); 3208 3209 // java.lang.ref.Reference 3210 3211 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;"); 3212 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;"); 3213 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;"); 3214 // Fake field 3215 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;"); 3216 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;"); 3217 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;"); 3218 3219 // java.lang.ref.SoftReference 3220 3221 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J"); 3222 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J"); 3223 3224 // java.lang.AssertionStatusDirectives 3225 // 3226 // The CheckAssertionStatusDirectives boolean can be removed from here and 3227 // globals.hpp after the AssertionStatusDirectives class has been integrated 3228 // into merlin "for some time." Without it, the vm will fail with early 3229 // merlin builds. 3230 3231 if (CheckAssertionStatusDirectives && JDK_Version::is_gte_jdk14x_version()) { 3232 const char* nm = "java/lang/AssertionStatusDirectives"; 3233 const char* sig = "[Ljava/lang/String;"; 3234 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig); 3235 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z"); 3236 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig); 3237 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z"); 3238 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z"); 3239 } 3240 3241 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed"); 3242 } 3243 3244 #endif // PRODUCT 3245 3246 void javaClasses_init() { 3247 JavaClasses::compute_offsets(); 3248 JavaClasses::check_offsets(); 3249 FilteredFieldsMap::initialize(); // must be done after computing offsets. 3250 }