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 "compiler/compilerOracle.hpp" 32 #include "interpreter/interpreter.hpp" 33 #include "memory/oopFactory.hpp" 34 #include "memory/resourceArea.hpp" 35 #include "memory/universe.inline.hpp" 36 #include "oops/instanceKlass.hpp" 37 #include "oops/instanceMirrorKlass.hpp" 38 #include "oops/klass.hpp" 39 #include "oops/klassOop.hpp" 40 #include "oops/methodOop.hpp" 41 #include "oops/symbol.hpp" 42 #include "oops/typeArrayOop.hpp" 43 #include "runtime/fieldDescriptor.hpp" 44 #include "runtime/handles.inline.hpp" 45 #include "runtime/interfaceSupport.hpp" 46 #include "runtime/java.hpp" 47 #include "runtime/javaCalls.hpp" 48 #include "runtime/safepoint.hpp" 49 #include "runtime/vframe.hpp" 50 #include "utilities/preserveException.hpp" 51 #ifdef TARGET_OS_FAMILY_linux 52 # include "thread_linux.inline.hpp" 53 #endif 54 #ifdef TARGET_OS_FAMILY_solaris 55 # include "thread_solaris.inline.hpp" 56 #endif 57 #ifdef TARGET_OS_FAMILY_windows 58 # include "thread_windows.inline.hpp" 59 #endif 60 61 static bool find_field(instanceKlass* ik, 62 Symbol* name_symbol, Symbol* signature_symbol, 63 fieldDescriptor* fd, 64 bool allow_super = false) { 65 if (allow_super) 66 return ik->find_field(name_symbol, signature_symbol, fd) != NULL; 67 else 68 return ik->find_local_field(name_symbol, signature_symbol, fd); 69 } 70 71 // Helpful routine for computing field offsets at run time rather than hardcoding them 72 static void 73 compute_offset(int &dest_offset, 74 klassOop klass_oop, Symbol* name_symbol, Symbol* signature_symbol, 75 bool allow_super = false) { 76 fieldDescriptor fd; 77 instanceKlass* ik = instanceKlass::cast(klass_oop); 78 if (!find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) { 79 ResourceMark rm; 80 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string()); 81 fatal("Invalid layout of preloaded class"); 82 } 83 dest_offset = fd.offset(); 84 } 85 86 // Same as above but for "optional" offsets that might not be present in certain JDK versions 87 static void 88 compute_optional_offset(int& dest_offset, 89 klassOop klass_oop, Symbol* name_symbol, Symbol* signature_symbol, 90 bool allow_super = false) { 91 fieldDescriptor fd; 92 instanceKlass* ik = instanceKlass::cast(klass_oop); 93 if (find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) { 94 dest_offset = fd.offset(); 95 } 96 } 97 98 99 Handle java_lang_String::basic_create(int length, bool tenured, TRAPS) { 100 // Create the String object first, so there's a chance that the String 101 // and the char array it points to end up in the same cache line. 102 oop obj; 103 if (tenured) { 104 obj = instanceKlass::cast(SystemDictionary::String_klass())->allocate_permanent_instance(CHECK_NH); 105 } else { 106 obj = instanceKlass::cast(SystemDictionary::String_klass())->allocate_instance(CHECK_NH); 107 } 108 109 // Create the char array. The String object must be handlized here 110 // because GC can happen as a result of the allocation attempt. 111 Handle h_obj(THREAD, obj); 112 typeArrayOop buffer; 113 if (tenured) { 114 buffer = oopFactory::new_permanent_charArray(length, CHECK_NH); 115 } else { 116 buffer = oopFactory::new_charArray(length, CHECK_NH); 117 } 118 119 // Point the String at the char array 120 obj = h_obj(); 121 set_value(obj, buffer); 122 // No need to zero the offset, allocation zero'ed the entire String object 123 assert(offset(obj) == 0, "initial String offset should be zero"); 124 //set_offset(obj, 0); 125 set_count(obj, length); 126 127 return h_obj; 128 } 129 130 Handle java_lang_String::basic_create_from_unicode(jchar* unicode, int length, bool tenured, TRAPS) { 131 Handle h_obj = basic_create(length, tenured, CHECK_NH); 132 typeArrayOop buffer = value(h_obj()); 133 for (int index = 0; index < length; index++) { 134 buffer->char_at_put(index, unicode[index]); 135 } 136 return h_obj; 137 } 138 139 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) { 140 return basic_create_from_unicode(unicode, length, false, CHECK_NH); 141 } 142 143 Handle java_lang_String::create_tenured_from_unicode(jchar* unicode, int length, TRAPS) { 144 return basic_create_from_unicode(unicode, length, JavaObjectsInPerm, CHECK_NH); 145 } 146 147 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) { 148 Handle h_obj = basic_create_from_unicode(unicode, length, false, CHECK_0); 149 return h_obj(); 150 } 151 152 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) { 153 if (utf8_str == NULL) { 154 return Handle(); 155 } 156 int length = UTF8::unicode_length(utf8_str); 157 Handle h_obj = basic_create(length, false, CHECK_NH); 158 if (length > 0) { 159 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 160 } 161 return h_obj; 162 } 163 164 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) { 165 Handle h_obj = create_from_str(utf8_str, CHECK_0); 166 return h_obj(); 167 } 168 169 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) { 170 int length = UTF8::unicode_length((char*)symbol->bytes(), symbol->utf8_length()); 171 Handle h_obj = basic_create(length, false, CHECK_NH); 172 if (length > 0) { 173 UTF8::convert_to_unicode((char*)symbol->bytes(), value(h_obj())->char_at_addr(0), length); 174 } 175 return h_obj; 176 } 177 178 // Converts a C string to a Java String based on current encoding 179 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) { 180 assert(str != NULL, "bad arguments"); 181 182 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *); 183 static to_java_string_fn_t _to_java_string_fn = NULL; 184 185 if (_to_java_string_fn == NULL) { 186 void *lib_handle = os::native_java_library(); 187 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform")); 188 if (_to_java_string_fn == NULL) { 189 fatal("NewStringPlatform missing"); 190 } 191 } 192 193 jstring js = NULL; 194 { JavaThread* thread = (JavaThread*)THREAD; 195 assert(thread->is_Java_thread(), "must be java thread"); 196 HandleMark hm(thread); 197 ThreadToNativeFromVM ttn(thread); 198 js = (_to_java_string_fn)(thread->jni_environment(), str); 199 } 200 return Handle(THREAD, JNIHandles::resolve(js)); 201 } 202 203 // Converts a Java String to a native C string that can be used for 204 // native OS calls. 205 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) { 206 207 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*); 208 static to_platform_string_fn_t _to_platform_string_fn = NULL; 209 210 if (_to_platform_string_fn == NULL) { 211 void *lib_handle = os::native_java_library(); 212 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars")); 213 if (_to_platform_string_fn == NULL) { 214 fatal("GetStringPlatformChars missing"); 215 } 216 } 217 218 char *native_platform_string; 219 { JavaThread* thread = (JavaThread*)THREAD; 220 assert(thread->is_Java_thread(), "must be java thread"); 221 JNIEnv *env = thread->jni_environment(); 222 jstring js = (jstring) JNIHandles::make_local(env, java_string()); 223 bool is_copy; 224 HandleMark hm(thread); 225 ThreadToNativeFromVM ttn(thread); 226 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy); 227 assert(is_copy == JNI_TRUE, "is_copy value changed"); 228 JNIHandles::destroy_local(js); 229 } 230 return native_platform_string; 231 } 232 233 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) { 234 oop obj = java_string(); 235 // Typical usage is to convert all '/' to '.' in string. 236 typeArrayOop value = java_lang_String::value(obj); 237 int offset = java_lang_String::offset(obj); 238 int length = java_lang_String::length(obj); 239 240 // First check if any from_char exist 241 int index; // Declared outside, used later 242 for (index = 0; index < length; index++) { 243 if (value->char_at(index + offset) == from_char) { 244 break; 245 } 246 } 247 if (index == length) { 248 // No from_char, so do not copy. 249 return java_string; 250 } 251 252 // Create new UNICODE buffer. Must handlize value because GC 253 // may happen during String and char array creation. 254 typeArrayHandle h_value(THREAD, value); 255 Handle string = basic_create(length, false, CHECK_NH); 256 257 typeArrayOop from_buffer = h_value(); 258 typeArrayOop to_buffer = java_lang_String::value(string()); 259 260 // Copy contents 261 for (index = 0; index < length; index++) { 262 jchar c = from_buffer->char_at(index + offset); 263 if (c == from_char) { 264 c = to_char; 265 } 266 to_buffer->char_at_put(index, c); 267 } 268 return string; 269 } 270 271 jchar* java_lang_String::as_unicode_string(oop java_string, int& length) { 272 typeArrayOop value = java_lang_String::value(java_string); 273 int offset = java_lang_String::offset(java_string); 274 length = java_lang_String::length(java_string); 275 276 jchar* result = NEW_RESOURCE_ARRAY(jchar, length); 277 for (int index = 0; index < length; index++) { 278 result[index] = value->char_at(index + offset); 279 } 280 return result; 281 } 282 283 unsigned int java_lang_String::hash_string(oop java_string) { 284 typeArrayOop value = java_lang_String::value(java_string); 285 int offset = java_lang_String::offset(java_string); 286 int length = java_lang_String::length(java_string); 287 288 if (length == 0) return 0; 289 return hash_string(value->char_at_addr(offset), length); 290 } 291 292 Symbol* java_lang_String::as_symbol(Handle java_string, TRAPS) { 293 oop obj = java_string(); 294 typeArrayOop value = java_lang_String::value(obj); 295 int offset = java_lang_String::offset(obj); 296 int length = java_lang_String::length(obj); 297 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset); 298 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD); 299 return sym; 300 } 301 302 Symbol* java_lang_String::as_symbol_or_null(oop java_string) { 303 typeArrayOop value = java_lang_String::value(java_string); 304 int offset = java_lang_String::offset(java_string); 305 int length = java_lang_String::length(java_string); 306 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset); 307 return SymbolTable::probe_unicode(base, length); 308 } 309 310 311 int java_lang_String::utf8_length(oop java_string) { 312 typeArrayOop value = java_lang_String::value(java_string); 313 int offset = java_lang_String::offset(java_string); 314 int length = java_lang_String::length(java_string); 315 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset); 316 return UNICODE::utf8_length(position, length); 317 } 318 319 char* java_lang_String::as_utf8_string(oop java_string) { 320 typeArrayOop value = java_lang_String::value(java_string); 321 int offset = java_lang_String::offset(java_string); 322 int length = java_lang_String::length(java_string); 323 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset); 324 return UNICODE::as_utf8(position, length); 325 } 326 327 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) { 328 typeArrayOop value = java_lang_String::value(java_string); 329 int offset = java_lang_String::offset(java_string); 330 int length = java_lang_String::length(java_string); 331 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset); 332 return UNICODE::as_utf8(position, length, buf, buflen); 333 } 334 335 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) { 336 typeArrayOop value = java_lang_String::value(java_string); 337 int offset = java_lang_String::offset(java_string); 338 int length = java_lang_String::length(java_string); 339 assert(start + len <= length, "just checking"); 340 jchar* position = value->char_at_addr(offset + start); 341 return UNICODE::as_utf8(position, len); 342 } 343 344 bool java_lang_String::equals(oop java_string, jchar* chars, int len) { 345 assert(SharedSkipVerify || 346 java_string->klass() == SystemDictionary::String_klass(), 347 "must be java_string"); 348 typeArrayOop value = java_lang_String::value(java_string); 349 int offset = java_lang_String::offset(java_string); 350 int length = java_lang_String::length(java_string); 351 if (length != len) { 352 return false; 353 } 354 for (int i = 0; i < len; i++) { 355 if (value->char_at(i + offset) != chars[i]) { 356 return false; 357 } 358 } 359 return true; 360 } 361 362 void java_lang_String::print(Handle java_string, outputStream* st) { 363 oop obj = java_string(); 364 assert(obj->klass() == SystemDictionary::String_klass(), "must be java_string"); 365 typeArrayOop value = java_lang_String::value(obj); 366 int offset = java_lang_String::offset(obj); 367 int length = java_lang_String::length(obj); 368 369 int end = MIN2(length, 100); 370 if (value == NULL) { 371 // This can happen if, e.g., printing a String 372 // object before its initializer has been called 373 st->print_cr("NULL"); 374 } else { 375 st->print("\""); 376 for (int index = 0; index < length; index++) { 377 st->print("%c", value->char_at(index + offset)); 378 } 379 st->print("\""); 380 } 381 } 382 383 static void initialize_static_field(fieldDescriptor* fd, TRAPS) { 384 Handle mirror (THREAD, fd->field_holder()->java_mirror()); 385 assert(mirror.not_null() && fd->is_static(), "just checking"); 386 if (fd->has_initial_value()) { 387 BasicType t = fd->field_type(); 388 switch (t) { 389 case T_BYTE: 390 mirror()->byte_field_put(fd->offset(), fd->int_initial_value()); 391 break; 392 case T_BOOLEAN: 393 mirror()->bool_field_put(fd->offset(), fd->int_initial_value()); 394 break; 395 case T_CHAR: 396 mirror()->char_field_put(fd->offset(), fd->int_initial_value()); 397 break; 398 case T_SHORT: 399 mirror()->short_field_put(fd->offset(), fd->int_initial_value()); 400 break; 401 case T_INT: 402 mirror()->int_field_put(fd->offset(), fd->int_initial_value()); 403 break; 404 case T_FLOAT: 405 mirror()->float_field_put(fd->offset(), fd->float_initial_value()); 406 break; 407 case T_DOUBLE: 408 mirror()->double_field_put(fd->offset(), fd->double_initial_value()); 409 break; 410 case T_LONG: 411 mirror()->long_field_put(fd->offset(), fd->long_initial_value()); 412 break; 413 case T_OBJECT: 414 { 415 #ifdef ASSERT 416 TempNewSymbol sym = SymbolTable::new_symbol("Ljava/lang/String;", CHECK); 417 assert(fd->signature() == sym, "just checking"); 418 #endif 419 oop string = fd->string_initial_value(CHECK); 420 mirror()->obj_field_put(fd->offset(), string); 421 } 422 break; 423 default: 424 THROW_MSG(vmSymbols::java_lang_ClassFormatError(), 425 "Illegal ConstantValue attribute in class file"); 426 } 427 } 428 } 429 430 431 // During bootstrap, java.lang.Class wasn't loaded so static field 432 // offsets were computed without the size added it. Go back and 433 // update all the static field offsets to included the size. 434 static void fixup_static_field(fieldDescriptor* fd, TRAPS) { 435 if (fd->is_static()) { 436 int real_offset = fd->offset() + instanceMirrorKlass::offset_of_static_fields(); 437 typeArrayOop fields = instanceKlass::cast(fd->field_holder())->fields(); 438 fields->short_at_put(fd->index() + instanceKlass::low_offset, extract_low_short_from_int(real_offset)); 439 fields->short_at_put(fd->index() + instanceKlass::high_offset, extract_high_short_from_int(real_offset)); 440 } 441 } 442 443 void java_lang_Class::fixup_mirror(KlassHandle k, TRAPS) { 444 assert(instanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already"); 445 446 if (k->oop_is_instance()) { 447 // Fixup the offsets 448 instanceKlass::cast(k())->do_local_static_fields(&fixup_static_field, CHECK); 449 } 450 create_mirror(k, CHECK); 451 } 452 453 oop java_lang_Class::create_mirror(KlassHandle k, TRAPS) { 454 assert(k->java_mirror() == NULL, "should only assign mirror once"); 455 // Use this moment of initialization to cache modifier_flags also, 456 // to support Class.getModifiers(). Instance classes recalculate 457 // the cached flags after the class file is parsed, but before the 458 // class is put into the system dictionary. 459 int computed_modifiers = k->compute_modifier_flags(CHECK_0); 460 k->set_modifier_flags(computed_modifiers); 461 if (SystemDictionary::Class_klass_loaded() && (k->oop_is_instance() || k->oop_is_javaArray())) { 462 // Allocate mirror (java.lang.Class instance) 463 Handle mirror = instanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK_0); 464 // Setup indirections 465 mirror->obj_field_put(klass_offset, k()); 466 k->set_java_mirror(mirror()); 467 468 instanceMirrorKlass* mk = instanceMirrorKlass::cast(mirror->klass()); 469 java_lang_Class::set_oop_size(mirror(), mk->instance_size(k)); 470 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror())); 471 472 // It might also have a component mirror. This mirror must already exist. 473 if (k->oop_is_javaArray()) { 474 Handle comp_mirror; 475 if (k->oop_is_typeArray()) { 476 BasicType type = typeArrayKlass::cast(k->as_klassOop())->element_type(); 477 comp_mirror = Universe::java_mirror(type); 478 assert(comp_mirror.not_null(), "must have primitive mirror"); 479 } else if (k->oop_is_objArray()) { 480 klassOop element_klass = objArrayKlass::cast(k->as_klassOop())->element_klass(); 481 if (element_klass != NULL 482 && (Klass::cast(element_klass)->oop_is_instance() || 483 Klass::cast(element_klass)->oop_is_javaArray())) { 484 comp_mirror = Klass::cast(element_klass)->java_mirror(); 485 assert(comp_mirror.not_null(), "must have element mirror"); 486 } 487 // else some object array internal to the VM, like systemObjArrayKlassObj 488 } 489 if (comp_mirror.not_null()) { 490 // Two-way link between the array klass and its component mirror: 491 arrayKlass::cast(k->as_klassOop())->set_component_mirror(comp_mirror()); 492 set_array_klass(comp_mirror(), k->as_klassOop()); 493 } 494 } else if (k->oop_is_instance()) { 495 // Initialize static fields 496 instanceKlass::cast(k())->do_local_static_fields(&initialize_static_field, CHECK_NULL); 497 } 498 return mirror(); 499 } else { 500 return NULL; 501 } 502 } 503 504 505 506 int java_lang_Class::oop_size(oop java_class) { 507 assert(oop_size_offset != 0, "must be set"); 508 return java_class->int_field(oop_size_offset); 509 } 510 void java_lang_Class::set_oop_size(oop java_class, int size) { 511 assert(oop_size_offset != 0, "must be set"); 512 java_class->int_field_put(oop_size_offset, size); 513 } 514 int java_lang_Class::static_oop_field_count(oop java_class) { 515 assert(static_oop_field_count_offset != 0, "must be set"); 516 return java_class->int_field(static_oop_field_count_offset); 517 } 518 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) { 519 assert(static_oop_field_count_offset != 0, "must be set"); 520 java_class->int_field_put(static_oop_field_count_offset, size); 521 } 522 523 524 525 526 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) { 527 // This should be improved by adding a field at the Java level or by 528 // introducing a new VM klass (see comment in ClassFileParser) 529 oop java_class = instanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance((oop)NULL, CHECK_0); 530 if (type != T_VOID) { 531 klassOop aklass = Universe::typeArrayKlassObj(type); 532 assert(aklass != NULL, "correct bootstrap"); 533 set_array_klass(java_class, aklass); 534 } 535 instanceMirrorKlass* mk = instanceMirrorKlass::cast(SystemDictionary::Class_klass()); 536 java_lang_Class::set_oop_size(java_class, mk->instance_size(oop(NULL))); 537 java_lang_Class::set_static_oop_field_count(java_class, 0); 538 return java_class; 539 } 540 541 542 klassOop java_lang_Class::as_klassOop(oop java_class) { 543 //%note memory_2 544 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 545 klassOop k = klassOop(java_class->obj_field(klass_offset)); 546 assert(k == NULL || k->is_klass(), "type check"); 547 return k; 548 } 549 550 551 void java_lang_Class::print_signature(oop java_class, outputStream* st) { 552 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 553 Symbol* name = NULL; 554 bool is_instance = false; 555 if (is_primitive(java_class)) { 556 name = vmSymbols::type_signature(primitive_type(java_class)); 557 } else { 558 klassOop k = as_klassOop(java_class); 559 is_instance = Klass::cast(k)->oop_is_instance(); 560 name = Klass::cast(k)->name(); 561 } 562 if (name == NULL) { 563 st->print("<null>"); 564 return; 565 } 566 if (is_instance) st->print("L"); 567 st->write((char*) name->base(), (int) name->utf8_length()); 568 if (is_instance) st->print(";"); 569 } 570 571 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) { 572 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 573 Symbol* name; 574 if (is_primitive(java_class)) { 575 name = vmSymbols::type_signature(primitive_type(java_class)); 576 // Because this can create a new symbol, the caller has to decrement 577 // the refcount, so make adjustment here and below for symbols returned 578 // that are not created or incremented due to a successful lookup. 579 name->increment_refcount(); 580 } else { 581 klassOop k = as_klassOop(java_class); 582 if (!Klass::cast(k)->oop_is_instance()) { 583 name = Klass::cast(k)->name(); 584 name->increment_refcount(); 585 } else { 586 ResourceMark rm; 587 const char* sigstr = Klass::cast(k)->signature_name(); 588 int siglen = (int) strlen(sigstr); 589 if (!intern_if_not_found) { 590 name = SymbolTable::probe(sigstr, siglen); 591 } else { 592 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 593 } 594 } 595 } 596 return name; 597 } 598 599 600 klassOop java_lang_Class::array_klass(oop java_class) { 601 klassOop k = klassOop(java_class->obj_field(array_klass_offset)); 602 assert(k == NULL || k->is_klass() && Klass::cast(k)->oop_is_javaArray(), "should be array klass"); 603 return k; 604 } 605 606 607 void java_lang_Class::set_array_klass(oop java_class, klassOop klass) { 608 assert(klass->is_klass() && Klass::cast(klass)->oop_is_javaArray(), "should be array klass"); 609 java_class->obj_field_put(array_klass_offset, klass); 610 } 611 612 613 methodOop java_lang_Class::resolved_constructor(oop java_class) { 614 oop constructor = java_class->obj_field(resolved_constructor_offset); 615 assert(constructor == NULL || constructor->is_method(), "should be method"); 616 return methodOop(constructor); 617 } 618 619 620 void java_lang_Class::set_resolved_constructor(oop java_class, methodOop constructor) { 621 assert(constructor->is_method(), "should be method"); 622 java_class->obj_field_put(resolved_constructor_offset, constructor); 623 } 624 625 626 bool java_lang_Class::is_primitive(oop java_class) { 627 // should assert: 628 //assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 629 klassOop k = klassOop(java_class->obj_field(klass_offset)); 630 return k == NULL; 631 } 632 633 634 BasicType java_lang_Class::primitive_type(oop java_class) { 635 assert(java_lang_Class::is_primitive(java_class), "just checking"); 636 klassOop ak = klassOop(java_class->obj_field(array_klass_offset)); 637 BasicType type = T_VOID; 638 if (ak != NULL) { 639 // Note: create_basic_type_mirror above initializes ak to a non-null value. 640 type = arrayKlass::cast(ak)->element_type(); 641 } else { 642 assert(java_class == Universe::void_mirror(), "only valid non-array primitive"); 643 } 644 assert(Universe::java_mirror(type) == java_class, "must be consistent"); 645 return type; 646 } 647 648 BasicType java_lang_Class::as_BasicType(oop java_class, klassOop* reference_klass) { 649 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 650 if (is_primitive(java_class)) { 651 if (reference_klass != NULL) 652 (*reference_klass) = NULL; 653 return primitive_type(java_class); 654 } else { 655 if (reference_klass != NULL) 656 (*reference_klass) = as_klassOop(java_class); 657 return T_OBJECT; 658 } 659 } 660 661 662 oop java_lang_Class::primitive_mirror(BasicType t) { 663 oop mirror = Universe::java_mirror(t); 664 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class"); 665 assert(java_lang_Class::is_primitive(mirror), "must be primitive"); 666 return mirror; 667 } 668 669 bool java_lang_Class::offsets_computed = false; 670 int java_lang_Class::classRedefinedCount_offset = -1; 671 int java_lang_Class::parallelCapable_offset = -1; 672 673 void java_lang_Class::compute_offsets() { 674 assert(!offsets_computed, "offsets should be initialized only once"); 675 offsets_computed = true; 676 677 klassOop k = SystemDictionary::Class_klass(); 678 // The classRedefinedCount field is only present starting in 1.5, 679 // so don't go fatal. 680 compute_optional_offset(classRedefinedCount_offset, 681 k, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature()); 682 683 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7, 684 klassOop k1 = SystemDictionary::ClassLoader_klass(); 685 compute_optional_offset(parallelCapable_offset, 686 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature()); 687 } 688 689 // For class loader classes, parallelCapable defined 690 // based on non-null field 691 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it 692 bool java_lang_Class::parallelCapable(oop class_loader) { 693 if (!JDK_Version::is_gte_jdk17x_version() 694 || parallelCapable_offset == -1) { 695 // Default for backward compatibility is false 696 return false; 697 } 698 return (class_loader->obj_field(parallelCapable_offset) != NULL); 699 } 700 701 int java_lang_Class::classRedefinedCount(oop the_class_mirror) { 702 if (!JDK_Version::is_gte_jdk15x_version() 703 || classRedefinedCount_offset == -1) { 704 // The classRedefinedCount field is only present starting in 1.5. 705 // If we don't have an offset for it then just return -1 as a marker. 706 return -1; 707 } 708 709 return the_class_mirror->int_field(classRedefinedCount_offset); 710 } 711 712 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) { 713 if (!JDK_Version::is_gte_jdk15x_version() 714 || classRedefinedCount_offset == -1) { 715 // The classRedefinedCount field is only present starting in 1.5. 716 // If we don't have an offset for it then nothing to set. 717 return; 718 } 719 720 the_class_mirror->int_field_put(classRedefinedCount_offset, value); 721 } 722 723 724 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the 725 // platform thread structure, and a eetop offset which was used for thread 726 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures 727 // merged, so in the HotSpot VM we just use the eetop field for the thread 728 // instead of the privateInfo_offset. 729 // 730 // Note: The stackSize field is only present starting in 1.4. 731 732 int java_lang_Thread::_name_offset = 0; 733 int java_lang_Thread::_group_offset = 0; 734 int java_lang_Thread::_contextClassLoader_offset = 0; 735 int java_lang_Thread::_inheritedAccessControlContext_offset = 0; 736 int java_lang_Thread::_priority_offset = 0; 737 int java_lang_Thread::_eetop_offset = 0; 738 int java_lang_Thread::_daemon_offset = 0; 739 int java_lang_Thread::_stillborn_offset = 0; 740 int java_lang_Thread::_stackSize_offset = 0; 741 int java_lang_Thread::_tid_offset = 0; 742 int java_lang_Thread::_thread_status_offset = 0; 743 int java_lang_Thread::_park_blocker_offset = 0; 744 int java_lang_Thread::_park_event_offset = 0 ; 745 746 747 void java_lang_Thread::compute_offsets() { 748 assert(_group_offset == 0, "offsets should be initialized only once"); 749 750 klassOop k = SystemDictionary::Thread_klass(); 751 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::char_array_signature()); 752 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature()); 753 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature()); 754 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature()); 755 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature()); 756 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature()); 757 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature()); 758 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature()); 759 // The stackSize field is only present starting in 1.4, so don't go fatal. 760 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature()); 761 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal. 762 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature()); 763 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature()); 764 // The parkBlocker field is only present starting in 1.6, so don't go fatal. 765 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature()); 766 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(), 767 vmSymbols::long_signature()); 768 } 769 770 771 JavaThread* java_lang_Thread::thread(oop java_thread) { 772 return (JavaThread*)java_thread->address_field(_eetop_offset); 773 } 774 775 776 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) { 777 java_thread->address_field_put(_eetop_offset, (address)thread); 778 } 779 780 781 typeArrayOop java_lang_Thread::name(oop java_thread) { 782 oop name = java_thread->obj_field(_name_offset); 783 assert(name == NULL || (name->is_typeArray() && typeArrayKlass::cast(name->klass())->element_type() == T_CHAR), "just checking"); 784 return typeArrayOop(name); 785 } 786 787 788 void java_lang_Thread::set_name(oop java_thread, typeArrayOop name) { 789 assert(java_thread->obj_field(_name_offset) == NULL, "name should be NULL"); 790 java_thread->obj_field_put(_name_offset, name); 791 } 792 793 794 ThreadPriority java_lang_Thread::priority(oop java_thread) { 795 return (ThreadPriority)java_thread->int_field(_priority_offset); 796 } 797 798 799 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) { 800 java_thread->int_field_put(_priority_offset, priority); 801 } 802 803 804 oop java_lang_Thread::threadGroup(oop java_thread) { 805 return java_thread->obj_field(_group_offset); 806 } 807 808 809 bool java_lang_Thread::is_stillborn(oop java_thread) { 810 return java_thread->bool_field(_stillborn_offset) != 0; 811 } 812 813 814 // We never have reason to turn the stillborn bit off 815 void java_lang_Thread::set_stillborn(oop java_thread) { 816 java_thread->bool_field_put(_stillborn_offset, true); 817 } 818 819 820 bool java_lang_Thread::is_alive(oop java_thread) { 821 JavaThread* thr = java_lang_Thread::thread(java_thread); 822 return (thr != NULL); 823 } 824 825 826 bool java_lang_Thread::is_daemon(oop java_thread) { 827 return java_thread->bool_field(_daemon_offset) != 0; 828 } 829 830 831 void java_lang_Thread::set_daemon(oop java_thread) { 832 java_thread->bool_field_put(_daemon_offset, true); 833 } 834 835 oop java_lang_Thread::context_class_loader(oop java_thread) { 836 return java_thread->obj_field(_contextClassLoader_offset); 837 } 838 839 oop java_lang_Thread::inherited_access_control_context(oop java_thread) { 840 return java_thread->obj_field(_inheritedAccessControlContext_offset); 841 } 842 843 844 jlong java_lang_Thread::stackSize(oop java_thread) { 845 // The stackSize field is only present starting in 1.4 846 if (_stackSize_offset > 0) { 847 assert(JDK_Version::is_gte_jdk14x_version(), "sanity check"); 848 return java_thread->long_field(_stackSize_offset); 849 } else { 850 return 0; 851 } 852 } 853 854 // Write the thread status value to threadStatus field in java.lang.Thread java class. 855 void java_lang_Thread::set_thread_status(oop java_thread, 856 java_lang_Thread::ThreadStatus status) { 857 assert(JavaThread::current()->thread_state() == _thread_in_vm, "Java Thread is not running in vm"); 858 // The threadStatus is only present starting in 1.5 859 if (_thread_status_offset > 0) { 860 java_thread->int_field_put(_thread_status_offset, status); 861 } 862 } 863 864 // Read thread status value from threadStatus field in java.lang.Thread java class. 865 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) { 866 assert(Thread::current()->is_VM_thread() || 867 JavaThread::current()->thread_state() == _thread_in_vm, 868 "Java Thread is not running in vm"); 869 // The threadStatus is only present starting in 1.5 870 if (_thread_status_offset > 0) { 871 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 872 } else { 873 // All we can easily figure out is if it is alive, but that is 874 // enough info for a valid unknown status. 875 // These aren't restricted to valid set ThreadStatus values, so 876 // use JVMTI values and cast. 877 JavaThread* thr = java_lang_Thread::thread(java_thread); 878 if (thr == NULL) { 879 // the thread hasn't run yet or is in the process of exiting 880 return NEW; 881 } 882 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE; 883 } 884 } 885 886 887 jlong java_lang_Thread::thread_id(oop java_thread) { 888 // The thread ID field is only present starting in 1.5 889 if (_tid_offset > 0) { 890 return java_thread->long_field(_tid_offset); 891 } else { 892 return 0; 893 } 894 } 895 896 oop java_lang_Thread::park_blocker(oop java_thread) { 897 assert(JDK_Version::current().supports_thread_park_blocker() && 898 _park_blocker_offset != 0, "Must support parkBlocker field"); 899 900 if (_park_blocker_offset > 0) { 901 return java_thread->obj_field(_park_blocker_offset); 902 } 903 904 return NULL; 905 } 906 907 jlong java_lang_Thread::park_event(oop java_thread) { 908 if (_park_event_offset > 0) { 909 return java_thread->long_field(_park_event_offset); 910 } 911 return 0; 912 } 913 914 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) { 915 if (_park_event_offset > 0) { 916 java_thread->long_field_put(_park_event_offset, ptr); 917 return true; 918 } 919 return false; 920 } 921 922 923 const char* java_lang_Thread::thread_status_name(oop java_thread) { 924 assert(JDK_Version::is_gte_jdk15x_version() && _thread_status_offset != 0, "Must have thread status"); 925 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 926 switch (status) { 927 case NEW : return "NEW"; 928 case RUNNABLE : return "RUNNABLE"; 929 case SLEEPING : return "TIMED_WAITING (sleeping)"; 930 case IN_OBJECT_WAIT : return "WAITING (on object monitor)"; 931 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)"; 932 case PARKED : return "WAITING (parking)"; 933 case PARKED_TIMED : return "TIMED_WAITING (parking)"; 934 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)"; 935 case TERMINATED : return "TERMINATED"; 936 default : return "UNKNOWN"; 937 }; 938 } 939 int java_lang_ThreadGroup::_parent_offset = 0; 940 int java_lang_ThreadGroup::_name_offset = 0; 941 int java_lang_ThreadGroup::_threads_offset = 0; 942 int java_lang_ThreadGroup::_groups_offset = 0; 943 int java_lang_ThreadGroup::_maxPriority_offset = 0; 944 int java_lang_ThreadGroup::_destroyed_offset = 0; 945 int java_lang_ThreadGroup::_daemon_offset = 0; 946 int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0; 947 int java_lang_ThreadGroup::_nthreads_offset = 0; 948 int java_lang_ThreadGroup::_ngroups_offset = 0; 949 950 oop java_lang_ThreadGroup::parent(oop java_thread_group) { 951 assert(java_thread_group->is_oop(), "thread group must be oop"); 952 return java_thread_group->obj_field(_parent_offset); 953 } 954 955 // ("name as oop" accessor is not necessary) 956 957 typeArrayOop java_lang_ThreadGroup::name(oop java_thread_group) { 958 oop name = java_thread_group->obj_field(_name_offset); 959 // ThreadGroup.name can be null 960 return name == NULL ? (typeArrayOop)NULL : java_lang_String::value(name); 961 } 962 963 int java_lang_ThreadGroup::nthreads(oop java_thread_group) { 964 assert(java_thread_group->is_oop(), "thread group must be oop"); 965 return java_thread_group->int_field(_nthreads_offset); 966 } 967 968 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) { 969 oop threads = java_thread_group->obj_field(_threads_offset); 970 assert(threads != NULL, "threadgroups should have threads"); 971 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code 972 return objArrayOop(threads); 973 } 974 975 int java_lang_ThreadGroup::ngroups(oop java_thread_group) { 976 assert(java_thread_group->is_oop(), "thread group must be oop"); 977 return java_thread_group->int_field(_ngroups_offset); 978 } 979 980 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) { 981 oop groups = java_thread_group->obj_field(_groups_offset); 982 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code 983 return objArrayOop(groups); 984 } 985 986 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) { 987 assert(java_thread_group->is_oop(), "thread group must be oop"); 988 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset); 989 } 990 991 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) { 992 assert(java_thread_group->is_oop(), "thread group must be oop"); 993 return java_thread_group->bool_field(_destroyed_offset) != 0; 994 } 995 996 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) { 997 assert(java_thread_group->is_oop(), "thread group must be oop"); 998 return java_thread_group->bool_field(_daemon_offset) != 0; 999 } 1000 1001 bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) { 1002 assert(java_thread_group->is_oop(), "thread group must be oop"); 1003 return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0; 1004 } 1005 1006 void java_lang_ThreadGroup::compute_offsets() { 1007 assert(_parent_offset == 0, "offsets should be initialized only once"); 1008 1009 klassOop k = SystemDictionary::ThreadGroup_klass(); 1010 1011 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature()); 1012 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1013 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature()); 1014 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature()); 1015 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature()); 1016 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature()); 1017 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature()); 1018 compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature()); 1019 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature()); 1020 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature()); 1021 } 1022 1023 oop java_lang_Throwable::unassigned_stacktrace() { 1024 instanceKlass* ik = instanceKlass::cast(SystemDictionary::Throwable_klass()); 1025 address addr = ik->static_field_addr(static_unassigned_stacktrace_offset); 1026 if (UseCompressedOops) { 1027 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 1028 } else { 1029 return oopDesc::load_decode_heap_oop((oop*)addr); 1030 } 1031 } 1032 1033 oop java_lang_Throwable::backtrace(oop throwable) { 1034 return throwable->obj_field_acquire(backtrace_offset); 1035 } 1036 1037 1038 void java_lang_Throwable::set_backtrace(oop throwable, oop value) { 1039 throwable->release_obj_field_put(backtrace_offset, value); 1040 } 1041 1042 1043 oop java_lang_Throwable::message(oop throwable) { 1044 return throwable->obj_field(detailMessage_offset); 1045 } 1046 1047 1048 oop java_lang_Throwable::message(Handle throwable) { 1049 return throwable->obj_field(detailMessage_offset); 1050 } 1051 1052 1053 void java_lang_Throwable::set_message(oop throwable, oop value) { 1054 throwable->obj_field_put(detailMessage_offset, value); 1055 } 1056 1057 1058 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) { 1059 throwable->obj_field_put(stackTrace_offset, st_element_array); 1060 } 1061 1062 void java_lang_Throwable::clear_stacktrace(oop throwable) { 1063 assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4"); 1064 set_stacktrace(throwable, NULL); 1065 } 1066 1067 1068 void java_lang_Throwable::print(oop throwable, outputStream* st) { 1069 ResourceMark rm; 1070 klassOop k = throwable->klass(); 1071 assert(k != NULL, "just checking"); 1072 st->print("%s", instanceKlass::cast(k)->external_name()); 1073 oop msg = message(throwable); 1074 if (msg != NULL) { 1075 st->print(": %s", java_lang_String::as_utf8_string(msg)); 1076 } 1077 } 1078 1079 1080 void java_lang_Throwable::print(Handle throwable, outputStream* st) { 1081 ResourceMark rm; 1082 klassOop k = throwable->klass(); 1083 assert(k != NULL, "just checking"); 1084 st->print("%s", instanceKlass::cast(k)->external_name()); 1085 oop msg = message(throwable); 1086 if (msg != NULL) { 1087 st->print(": %s", java_lang_String::as_utf8_string(msg)); 1088 } 1089 } 1090 1091 // Print stack trace element to resource allocated buffer 1092 char* java_lang_Throwable::print_stack_element_to_buffer(methodOop method, int bci) { 1093 // Get strings and string lengths 1094 instanceKlass* klass = instanceKlass::cast(method->method_holder()); 1095 const char* klass_name = klass->external_name(); 1096 int buf_len = (int)strlen(klass_name); 1097 char* source_file_name; 1098 if (klass->source_file_name() == NULL) { 1099 source_file_name = NULL; 1100 } else { 1101 source_file_name = klass->source_file_name()->as_C_string(); 1102 buf_len += (int)strlen(source_file_name); 1103 } 1104 char* method_name = method->name()->as_C_string(); 1105 buf_len += (int)strlen(method_name); 1106 1107 // Allocate temporary buffer with extra space for formatting and line number 1108 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64); 1109 1110 // Print stack trace line in buffer 1111 sprintf(buf, "\tat %s.%s", klass_name, method_name); 1112 if (method->is_native()) { 1113 strcat(buf, "(Native Method)"); 1114 } else { 1115 int line_number = method->line_number_from_bci(bci); 1116 if (source_file_name != NULL && (line_number != -1)) { 1117 // Sourcename and linenumber 1118 sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number); 1119 } else if (source_file_name != NULL) { 1120 // Just sourcename 1121 sprintf(buf + (int)strlen(buf), "(%s)", source_file_name); 1122 } else { 1123 // Neither soucename and linenumber 1124 sprintf(buf + (int)strlen(buf), "(Unknown Source)"); 1125 } 1126 nmethod* nm = method->code(); 1127 if (WizardMode && nm != NULL) { 1128 sprintf(buf + (int)strlen(buf), "(nmethod " PTR_FORMAT ")", (intptr_t)nm); 1129 } 1130 } 1131 1132 return buf; 1133 } 1134 1135 1136 void java_lang_Throwable::print_stack_element(Handle stream, methodOop method, int bci) { 1137 ResourceMark rm; 1138 char* buf = print_stack_element_to_buffer(method, bci); 1139 print_to_stream(stream, buf); 1140 } 1141 1142 void java_lang_Throwable::print_stack_element(outputStream *st, methodOop method, int bci) { 1143 ResourceMark rm; 1144 char* buf = print_stack_element_to_buffer(method, bci); 1145 st->print_cr("%s", buf); 1146 } 1147 1148 void java_lang_Throwable::print_to_stream(Handle stream, const char* str) { 1149 if (stream.is_null()) { 1150 tty->print_cr("%s", str); 1151 } else { 1152 EXCEPTION_MARK; 1153 JavaValue result(T_VOID); 1154 Handle arg (THREAD, oopFactory::new_charArray(str, THREAD)); 1155 if (!HAS_PENDING_EXCEPTION) { 1156 JavaCalls::call_virtual(&result, 1157 stream, 1158 KlassHandle(THREAD, stream->klass()), 1159 vmSymbols::println_name(), 1160 vmSymbols::char_array_void_signature(), 1161 arg, 1162 THREAD); 1163 } 1164 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 1165 if (HAS_PENDING_EXCEPTION) CLEAR_PENDING_EXCEPTION; 1166 } 1167 1168 } 1169 1170 1171 const char* java_lang_Throwable::no_stack_trace_message() { 1172 return "\t<<no stack trace available>>"; 1173 } 1174 1175 1176 // Currently used only for exceptions occurring during startup 1177 void java_lang_Throwable::print_stack_trace(oop throwable, outputStream* st) { 1178 Thread *THREAD = Thread::current(); 1179 Handle h_throwable(THREAD, throwable); 1180 while (h_throwable.not_null()) { 1181 objArrayHandle result (THREAD, objArrayOop(backtrace(h_throwable()))); 1182 if (result.is_null()) { 1183 st->print_cr(no_stack_trace_message()); 1184 return; 1185 } 1186 1187 while (result.not_null()) { 1188 objArrayHandle methods (THREAD, 1189 objArrayOop(result->obj_at(trace_methods_offset))); 1190 typeArrayHandle bcis (THREAD, 1191 typeArrayOop(result->obj_at(trace_bcis_offset))); 1192 1193 if (methods.is_null() || bcis.is_null()) { 1194 st->print_cr(no_stack_trace_message()); 1195 return; 1196 } 1197 1198 int length = methods()->length(); 1199 for (int index = 0; index < length; index++) { 1200 methodOop method = methodOop(methods()->obj_at(index)); 1201 if (method == NULL) goto handle_cause; 1202 int bci = bcis->ushort_at(index); 1203 print_stack_element(st, method, bci); 1204 } 1205 result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset))); 1206 } 1207 handle_cause: 1208 { 1209 EXCEPTION_MARK; 1210 JavaValue result(T_OBJECT); 1211 JavaCalls::call_virtual(&result, 1212 h_throwable, 1213 KlassHandle(THREAD, h_throwable->klass()), 1214 vmSymbols::getCause_name(), 1215 vmSymbols::void_throwable_signature(), 1216 THREAD); 1217 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 1218 if (HAS_PENDING_EXCEPTION) { 1219 CLEAR_PENDING_EXCEPTION; 1220 h_throwable = Handle(); 1221 } else { 1222 h_throwable = Handle(THREAD, (oop) result.get_jobject()); 1223 if (h_throwable.not_null()) { 1224 st->print("Caused by: "); 1225 print(h_throwable, st); 1226 st->cr(); 1227 } 1228 } 1229 } 1230 } 1231 } 1232 1233 1234 void java_lang_Throwable::print_stack_trace(oop throwable, oop print_stream) { 1235 // Note: this is no longer used in Merlin, but we support it for compatibility. 1236 Thread *thread = Thread::current(); 1237 Handle stream(thread, print_stream); 1238 objArrayHandle result (thread, objArrayOop(backtrace(throwable))); 1239 if (result.is_null()) { 1240 print_to_stream(stream, no_stack_trace_message()); 1241 return; 1242 } 1243 1244 while (result.not_null()) { 1245 objArrayHandle methods (thread, 1246 objArrayOop(result->obj_at(trace_methods_offset))); 1247 typeArrayHandle bcis (thread, 1248 typeArrayOop(result->obj_at(trace_bcis_offset))); 1249 1250 if (methods.is_null() || bcis.is_null()) { 1251 print_to_stream(stream, no_stack_trace_message()); 1252 return; 1253 } 1254 1255 int length = methods()->length(); 1256 for (int index = 0; index < length; index++) { 1257 methodOop method = methodOop(methods()->obj_at(index)); 1258 if (method == NULL) return; 1259 int bci = bcis->ushort_at(index); 1260 print_stack_element(stream, method, bci); 1261 } 1262 result = objArrayHandle(thread, objArrayOop(result->obj_at(trace_next_offset))); 1263 } 1264 } 1265 1266 // This class provides a simple wrapper over the internal structure of 1267 // exception backtrace to insulate users of the backtrace from needing 1268 // to know what it looks like. 1269 class BacktraceBuilder: public StackObj { 1270 private: 1271 Handle _backtrace; 1272 objArrayOop _head; 1273 objArrayOop _methods; 1274 typeArrayOop _bcis; 1275 int _index; 1276 No_Safepoint_Verifier _nsv; 1277 1278 public: 1279 1280 enum { 1281 trace_methods_offset = java_lang_Throwable::trace_methods_offset, 1282 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset, 1283 trace_next_offset = java_lang_Throwable::trace_next_offset, 1284 trace_size = java_lang_Throwable::trace_size, 1285 trace_chunk_size = java_lang_Throwable::trace_chunk_size 1286 }; 1287 1288 // constructor for new backtrace 1289 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL) { 1290 expand(CHECK); 1291 _backtrace = _head; 1292 _index = 0; 1293 } 1294 1295 void expand(TRAPS) { 1296 objArrayHandle old_head(THREAD, _head); 1297 Pause_No_Safepoint_Verifier pnsv(&_nsv); 1298 1299 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK); 1300 objArrayHandle new_head(THREAD, head); 1301 1302 objArrayOop methods = oopFactory::new_objectArray(trace_chunk_size, CHECK); 1303 objArrayHandle new_methods(THREAD, methods); 1304 1305 typeArrayOop bcis = oopFactory::new_shortArray(trace_chunk_size, CHECK); 1306 typeArrayHandle new_bcis(THREAD, bcis); 1307 1308 if (!old_head.is_null()) { 1309 old_head->obj_at_put(trace_next_offset, new_head()); 1310 } 1311 new_head->obj_at_put(trace_methods_offset, new_methods()); 1312 new_head->obj_at_put(trace_bcis_offset, new_bcis()); 1313 1314 _head = new_head(); 1315 _methods = new_methods(); 1316 _bcis = new_bcis(); 1317 _index = 0; 1318 } 1319 1320 oop backtrace() { 1321 return _backtrace(); 1322 } 1323 1324 inline void push(methodOop method, short bci, TRAPS) { 1325 if (_index >= trace_chunk_size) { 1326 methodHandle mhandle(THREAD, method); 1327 expand(CHECK); 1328 method = mhandle(); 1329 } 1330 1331 _methods->obj_at_put(_index, method); 1332 _bcis->ushort_at_put(_index, bci); 1333 _index++; 1334 } 1335 1336 methodOop current_method() { 1337 assert(_index >= 0 && _index < trace_chunk_size, "out of range"); 1338 return methodOop(_methods->obj_at(_index)); 1339 } 1340 1341 jushort current_bci() { 1342 assert(_index >= 0 && _index < trace_chunk_size, "out of range"); 1343 return _bcis->ushort_at(_index); 1344 } 1345 }; 1346 1347 1348 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS) { 1349 if (!StackTraceInThrowable) return; 1350 ResourceMark rm(THREAD); 1351 1352 // Start out by clearing the backtrace for this object, in case the VM 1353 // runs out of memory while allocating the stack trace 1354 set_backtrace(throwable(), NULL); 1355 if (JDK_Version::is_gte_jdk14x_version()) { 1356 // New since 1.4, clear lazily constructed Java level stacktrace if 1357 // refilling occurs 1358 // This is unnecessary in 1.7+ but harmless 1359 clear_stacktrace(throwable()); 1360 } 1361 1362 int max_depth = MaxJavaStackTraceDepth; 1363 JavaThread* thread = (JavaThread*)THREAD; 1364 BacktraceBuilder bt(CHECK); 1365 1366 // If there is no Java frame just return the method that was being called 1367 // with bci 0 1368 if (!thread->has_last_Java_frame()) { 1369 if (max_depth >= 1 && method() != NULL) { 1370 bt.push(method(), 0, CHECK); 1371 set_backtrace(throwable(), bt.backtrace()); 1372 } 1373 return; 1374 } 1375 1376 // Instead of using vframe directly, this version of fill_in_stack_trace 1377 // basically handles everything by hand. This significantly improved the 1378 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows. 1379 // See bug 6333838 for more details. 1380 // The "ASSERT" here is to verify this method generates the exactly same stack 1381 // trace as utilizing vframe. 1382 #ifdef ASSERT 1383 vframeStream st(thread); 1384 methodHandle st_method(THREAD, st.method()); 1385 #endif 1386 int total_count = 0; 1387 RegisterMap map(thread, false); 1388 int decode_offset = 0; 1389 nmethod* nm = NULL; 1390 bool skip_fillInStackTrace_check = false; 1391 bool skip_throwableInit_check = false; 1392 1393 for (frame fr = thread->last_frame(); max_depth != total_count;) { 1394 methodOop method = NULL; 1395 int bci = 0; 1396 1397 // Compiled java method case. 1398 if (decode_offset != 0) { 1399 DebugInfoReadStream stream(nm, decode_offset); 1400 decode_offset = stream.read_int(); 1401 method = (methodOop)nm->oop_at(stream.read_int()); 1402 bci = stream.read_bci(); 1403 } else { 1404 if (fr.is_first_frame()) break; 1405 address pc = fr.pc(); 1406 if (fr.is_interpreted_frame()) { 1407 intptr_t bcx = fr.interpreter_frame_bcx(); 1408 method = fr.interpreter_frame_method(); 1409 bci = fr.is_bci(bcx) ? bcx : method->bci_from((address)bcx); 1410 fr = fr.sender(&map); 1411 } else { 1412 CodeBlob* cb = fr.cb(); 1413 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL 1414 // but non nmethod 1415 fr = fr.sender(&map); 1416 if (cb == NULL || !cb->is_nmethod()) { 1417 continue; 1418 } 1419 nm = (nmethod*)cb; 1420 if (nm->method()->is_native()) { 1421 method = nm->method(); 1422 bci = 0; 1423 } else { 1424 PcDesc* pd = nm->pc_desc_at(pc); 1425 decode_offset = pd->scope_decode_offset(); 1426 // if decode_offset is not equal to 0, it will execute the 1427 // "compiled java method case" at the beginning of the loop. 1428 continue; 1429 } 1430 } 1431 } 1432 #ifdef ASSERT 1433 assert(st_method() == method && st.bci() == bci, 1434 "Wrong stack trace"); 1435 st.next(); 1436 // vframeStream::method isn't GC-safe so store off a copy 1437 // of the methodOop in case we GC. 1438 if (!st.at_end()) { 1439 st_method = st.method(); 1440 } 1441 #endif 1442 1443 // the format of the stacktrace will be: 1444 // - 1 or more fillInStackTrace frames for the exception class (skipped) 1445 // - 0 or more <init> methods for the exception class (skipped) 1446 // - rest of the stack 1447 1448 if (!skip_fillInStackTrace_check) { 1449 if ((method->name() == vmSymbols::fillInStackTrace_name() || 1450 method->name() == vmSymbols::fillInStackTrace0_name()) && 1451 throwable->is_a(method->method_holder())) { 1452 continue; 1453 } 1454 else { 1455 skip_fillInStackTrace_check = true; // gone past them all 1456 } 1457 } 1458 if (!skip_throwableInit_check) { 1459 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering"); 1460 1461 // skip <init> methods of the exception class and superclasses 1462 // This is simlar to classic VM. 1463 if (method->name() == vmSymbols::object_initializer_name() && 1464 throwable->is_a(method->method_holder())) { 1465 continue; 1466 } else { 1467 // there are none or we've seen them all - either way stop checking 1468 skip_throwableInit_check = true; 1469 } 1470 } 1471 bt.push(method, bci, CHECK); 1472 total_count++; 1473 } 1474 1475 // Put completed stack trace into throwable object 1476 set_backtrace(throwable(), bt.backtrace()); 1477 } 1478 1479 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method) { 1480 // No-op if stack trace is disabled 1481 if (!StackTraceInThrowable) { 1482 return; 1483 } 1484 1485 // Disable stack traces for some preallocated out of memory errors 1486 if (!Universe::should_fill_in_stack_trace(throwable)) { 1487 return; 1488 } 1489 1490 PRESERVE_EXCEPTION_MARK; 1491 1492 JavaThread* thread = JavaThread::active(); 1493 fill_in_stack_trace(throwable, method, thread); 1494 // ignore exceptions thrown during stack trace filling 1495 CLEAR_PENDING_EXCEPTION; 1496 } 1497 1498 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 1499 // Allocate stack trace - backtrace is created but not filled in 1500 1501 // No-op if stack trace is disabled 1502 if (!StackTraceInThrowable) return; 1503 1504 objArrayOop h_oop = oopFactory::new_objectArray(trace_size, CHECK); 1505 objArrayHandle backtrace (THREAD, h_oop); 1506 objArrayOop m_oop = oopFactory::new_objectArray(trace_chunk_size, CHECK); 1507 objArrayHandle methods (THREAD, m_oop); 1508 typeArrayOop b = oopFactory::new_shortArray(trace_chunk_size, CHECK); 1509 typeArrayHandle bcis(THREAD, b); 1510 1511 // backtrace has space for one chunk (next is NULL) 1512 backtrace->obj_at_put(trace_methods_offset, methods()); 1513 backtrace->obj_at_put(trace_bcis_offset, bcis()); 1514 set_backtrace(throwable(), backtrace()); 1515 } 1516 1517 1518 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 1519 // Fill in stack trace into preallocated backtrace (no GC) 1520 1521 // No-op if stack trace is disabled 1522 if (!StackTraceInThrowable) return; 1523 1524 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check"); 1525 1526 oop backtrace = java_lang_Throwable::backtrace(throwable()); 1527 assert(backtrace != NULL, "backtrace not preallocated"); 1528 1529 oop m = objArrayOop(backtrace)->obj_at(trace_methods_offset); 1530 objArrayOop methods = objArrayOop(m); 1531 assert(methods != NULL && methods->length() > 0, "method array not preallocated"); 1532 1533 oop b = objArrayOop(backtrace)->obj_at(trace_bcis_offset); 1534 typeArrayOop bcis = typeArrayOop(b); 1535 assert(bcis != NULL, "bci array not preallocated"); 1536 1537 assert(methods->length() == bcis->length(), "method and bci arrays should match"); 1538 1539 JavaThread* thread = JavaThread::current(); 1540 ResourceMark rm(thread); 1541 vframeStream st(thread); 1542 1543 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 1544 // methods as preallocated errors aren't created by "java" code. 1545 1546 // fill in as much stack trace as possible 1547 int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth); 1548 int chunk_count = 0; 1549 1550 for (;!st.at_end(); st.next()) { 1551 // add element 1552 bcis->ushort_at_put(chunk_count, st.bci()); 1553 methods->obj_at_put(chunk_count, st.method()); 1554 1555 chunk_count++; 1556 1557 // Bail-out for deep stacks 1558 if (chunk_count >= max_chunks) break; 1559 } 1560 1561 // For Java 7+ we support the Throwable immutability protocol defined for Java 7. This support 1562 // was missing in 7u0 so in 7u0 there is a workaround in the Throwable class. That workaround 1563 // can be removed in a JDK using this JVM version 1564 if (JDK_Version::is_gte_jdk17x_version()) { 1565 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace()); 1566 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized"); 1567 } 1568 1569 } 1570 1571 1572 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) { 1573 if (throwable == NULL) { 1574 THROW_0(vmSymbols::java_lang_NullPointerException()); 1575 } 1576 objArrayOop chunk = objArrayOop(backtrace(throwable)); 1577 int depth = 0; 1578 if (chunk != NULL) { 1579 // Iterate over chunks and count full ones 1580 while (true) { 1581 objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset)); 1582 if (next == NULL) break; 1583 depth += trace_chunk_size; 1584 chunk = next; 1585 } 1586 assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check"); 1587 // Count element in remaining partial chunk 1588 objArrayOop methods = objArrayOop(chunk->obj_at(trace_methods_offset)); 1589 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 1590 assert(methods != NULL && bcis != NULL, "sanity check"); 1591 for (int i = 0; i < methods->length(); i++) { 1592 if (methods->obj_at(i) == NULL) break; 1593 depth++; 1594 } 1595 } 1596 return depth; 1597 } 1598 1599 1600 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) { 1601 if (throwable == NULL) { 1602 THROW_0(vmSymbols::java_lang_NullPointerException()); 1603 } 1604 if (index < 0) { 1605 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 1606 } 1607 // Compute how many chunks to skip and index into actual chunk 1608 objArrayOop chunk = objArrayOop(backtrace(throwable)); 1609 int skip_chunks = index / trace_chunk_size; 1610 int chunk_index = index % trace_chunk_size; 1611 while (chunk != NULL && skip_chunks > 0) { 1612 chunk = objArrayOop(chunk->obj_at(trace_next_offset)); 1613 skip_chunks--; 1614 } 1615 if (chunk == NULL) { 1616 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 1617 } 1618 // Get method,bci from chunk 1619 objArrayOop methods = objArrayOop(chunk->obj_at(trace_methods_offset)); 1620 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 1621 assert(methods != NULL && bcis != NULL, "sanity check"); 1622 methodHandle method(THREAD, methodOop(methods->obj_at(chunk_index))); 1623 int bci = bcis->ushort_at(chunk_index); 1624 // Chunk can be partial full 1625 if (method.is_null()) { 1626 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 1627 } 1628 1629 oop element = java_lang_StackTraceElement::create(method, bci, CHECK_0); 1630 return element; 1631 } 1632 1633 oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) { 1634 // SystemDictionary::stackTraceElement_klass() will be null for pre-1.4 JDKs 1635 assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4"); 1636 1637 // Allocate java.lang.StackTraceElement instance 1638 klassOop k = SystemDictionary::StackTraceElement_klass(); 1639 assert(k != NULL, "must be loaded in 1.4+"); 1640 instanceKlassHandle ik (THREAD, k); 1641 if (ik->should_be_initialized()) { 1642 ik->initialize(CHECK_0); 1643 } 1644 1645 Handle element = ik->allocate_instance_handle(CHECK_0); 1646 // Fill in class name 1647 ResourceMark rm(THREAD); 1648 const char* str = instanceKlass::cast(method->method_holder())->external_name(); 1649 oop classname = StringTable::intern((char*) str, CHECK_0); 1650 java_lang_StackTraceElement::set_declaringClass(element(), classname); 1651 // Fill in method name 1652 oop methodname = StringTable::intern(method->name(), CHECK_0); 1653 java_lang_StackTraceElement::set_methodName(element(), methodname); 1654 // Fill in source file name 1655 Symbol* source = instanceKlass::cast(method->method_holder())->source_file_name(); 1656 oop filename = StringTable::intern(source, CHECK_0); 1657 java_lang_StackTraceElement::set_fileName(element(), filename); 1658 // File in source line number 1659 int line_number; 1660 if (method->is_native()) { 1661 // Negative value different from -1 below, enabling Java code in 1662 // class java.lang.StackTraceElement to distinguish "native" from 1663 // "no LineNumberTable". 1664 line_number = -2; 1665 } else { 1666 // Returns -1 if no LineNumberTable, and otherwise actual line number 1667 line_number = method->line_number_from_bci(bci); 1668 } 1669 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 1670 1671 return element(); 1672 } 1673 1674 1675 void java_lang_reflect_AccessibleObject::compute_offsets() { 1676 klassOop k = SystemDictionary::reflect_AccessibleObject_klass(); 1677 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature()); 1678 } 1679 1680 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 1681 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1682 return (jboolean) reflect->bool_field(override_offset); 1683 } 1684 1685 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 1686 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1687 reflect->bool_field_put(override_offset, (int) value); 1688 } 1689 1690 void java_lang_reflect_Method::compute_offsets() { 1691 klassOop k = SystemDictionary::reflect_Method_klass(); 1692 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 1693 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1694 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature()); 1695 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 1696 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 1697 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 1698 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 1699 // The generic signature and annotations fields are only present in 1.5 1700 signature_offset = -1; 1701 annotations_offset = -1; 1702 parameter_annotations_offset = -1; 1703 annotation_default_offset = -1; 1704 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 1705 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 1706 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 1707 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature()); 1708 } 1709 1710 Handle java_lang_reflect_Method::create(TRAPS) { 1711 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1712 klassOop klass = SystemDictionary::reflect_Method_klass(); 1713 // This class is eagerly initialized during VM initialization, since we keep a refence 1714 // to one of the methods 1715 assert(instanceKlass::cast(klass)->is_initialized(), "must be initialized"); 1716 return instanceKlass::cast(klass)->allocate_instance_handle(CHECK_NH); 1717 } 1718 1719 oop java_lang_reflect_Method::clazz(oop reflect) { 1720 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1721 return reflect->obj_field(clazz_offset); 1722 } 1723 1724 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 1725 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1726 reflect->obj_field_put(clazz_offset, value); 1727 } 1728 1729 int java_lang_reflect_Method::slot(oop reflect) { 1730 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1731 return reflect->int_field(slot_offset); 1732 } 1733 1734 void java_lang_reflect_Method::set_slot(oop reflect, int value) { 1735 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1736 reflect->int_field_put(slot_offset, value); 1737 } 1738 1739 oop java_lang_reflect_Method::name(oop method) { 1740 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1741 return method->obj_field(name_offset); 1742 } 1743 1744 void java_lang_reflect_Method::set_name(oop method, oop value) { 1745 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1746 method->obj_field_put(name_offset, value); 1747 } 1748 1749 oop java_lang_reflect_Method::return_type(oop method) { 1750 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1751 return method->obj_field(returnType_offset); 1752 } 1753 1754 void java_lang_reflect_Method::set_return_type(oop method, oop value) { 1755 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1756 method->obj_field_put(returnType_offset, value); 1757 } 1758 1759 oop java_lang_reflect_Method::parameter_types(oop method) { 1760 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1761 return method->obj_field(parameterTypes_offset); 1762 } 1763 1764 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 1765 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1766 method->obj_field_put(parameterTypes_offset, value); 1767 } 1768 1769 oop java_lang_reflect_Method::exception_types(oop method) { 1770 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1771 return method->obj_field(exceptionTypes_offset); 1772 } 1773 1774 void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 1775 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1776 method->obj_field_put(exceptionTypes_offset, value); 1777 } 1778 1779 int java_lang_reflect_Method::modifiers(oop method) { 1780 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1781 return method->int_field(modifiers_offset); 1782 } 1783 1784 void java_lang_reflect_Method::set_modifiers(oop method, int value) { 1785 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1786 method->int_field_put(modifiers_offset, value); 1787 } 1788 1789 bool java_lang_reflect_Method::has_signature_field() { 1790 return (signature_offset >= 0); 1791 } 1792 1793 oop java_lang_reflect_Method::signature(oop method) { 1794 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1795 assert(has_signature_field(), "signature field must be present"); 1796 return method->obj_field(signature_offset); 1797 } 1798 1799 void java_lang_reflect_Method::set_signature(oop method, oop value) { 1800 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1801 assert(has_signature_field(), "signature field must be present"); 1802 method->obj_field_put(signature_offset, value); 1803 } 1804 1805 bool java_lang_reflect_Method::has_annotations_field() { 1806 return (annotations_offset >= 0); 1807 } 1808 1809 oop java_lang_reflect_Method::annotations(oop method) { 1810 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1811 assert(has_annotations_field(), "annotations field must be present"); 1812 return method->obj_field(annotations_offset); 1813 } 1814 1815 void java_lang_reflect_Method::set_annotations(oop method, oop value) { 1816 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1817 assert(has_annotations_field(), "annotations field must be present"); 1818 method->obj_field_put(annotations_offset, value); 1819 } 1820 1821 bool java_lang_reflect_Method::has_parameter_annotations_field() { 1822 return (parameter_annotations_offset >= 0); 1823 } 1824 1825 oop java_lang_reflect_Method::parameter_annotations(oop method) { 1826 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1827 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 1828 return method->obj_field(parameter_annotations_offset); 1829 } 1830 1831 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 1832 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1833 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 1834 method->obj_field_put(parameter_annotations_offset, value); 1835 } 1836 1837 bool java_lang_reflect_Method::has_annotation_default_field() { 1838 return (annotation_default_offset >= 0); 1839 } 1840 1841 oop java_lang_reflect_Method::annotation_default(oop method) { 1842 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1843 assert(has_annotation_default_field(), "annotation default field must be present"); 1844 return method->obj_field(annotation_default_offset); 1845 } 1846 1847 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 1848 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1849 assert(has_annotation_default_field(), "annotation default field must be present"); 1850 method->obj_field_put(annotation_default_offset, value); 1851 } 1852 1853 void java_lang_reflect_Constructor::compute_offsets() { 1854 klassOop k = SystemDictionary::reflect_Constructor_klass(); 1855 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 1856 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 1857 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 1858 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 1859 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 1860 // The generic signature and annotations fields are only present in 1.5 1861 signature_offset = -1; 1862 annotations_offset = -1; 1863 parameter_annotations_offset = -1; 1864 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 1865 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 1866 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 1867 } 1868 1869 Handle java_lang_reflect_Constructor::create(TRAPS) { 1870 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1871 Symbol* name = vmSymbols::java_lang_reflect_Constructor(); 1872 klassOop k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 1873 instanceKlassHandle klass (THREAD, k); 1874 // Ensure it is initialized 1875 klass->initialize(CHECK_NH); 1876 return klass->allocate_instance_handle(CHECK_NH); 1877 } 1878 1879 oop java_lang_reflect_Constructor::clazz(oop reflect) { 1880 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1881 return reflect->obj_field(clazz_offset); 1882 } 1883 1884 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 1885 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1886 reflect->obj_field_put(clazz_offset, value); 1887 } 1888 1889 oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 1890 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1891 return constructor->obj_field(parameterTypes_offset); 1892 } 1893 1894 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 1895 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1896 constructor->obj_field_put(parameterTypes_offset, value); 1897 } 1898 1899 oop java_lang_reflect_Constructor::exception_types(oop constructor) { 1900 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1901 return constructor->obj_field(exceptionTypes_offset); 1902 } 1903 1904 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 1905 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1906 constructor->obj_field_put(exceptionTypes_offset, value); 1907 } 1908 1909 int java_lang_reflect_Constructor::slot(oop reflect) { 1910 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1911 return reflect->int_field(slot_offset); 1912 } 1913 1914 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 1915 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1916 reflect->int_field_put(slot_offset, value); 1917 } 1918 1919 int java_lang_reflect_Constructor::modifiers(oop constructor) { 1920 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1921 return constructor->int_field(modifiers_offset); 1922 } 1923 1924 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 1925 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1926 constructor->int_field_put(modifiers_offset, value); 1927 } 1928 1929 bool java_lang_reflect_Constructor::has_signature_field() { 1930 return (signature_offset >= 0); 1931 } 1932 1933 oop java_lang_reflect_Constructor::signature(oop constructor) { 1934 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1935 assert(has_signature_field(), "signature field must be present"); 1936 return constructor->obj_field(signature_offset); 1937 } 1938 1939 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 1940 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1941 assert(has_signature_field(), "signature field must be present"); 1942 constructor->obj_field_put(signature_offset, value); 1943 } 1944 1945 bool java_lang_reflect_Constructor::has_annotations_field() { 1946 return (annotations_offset >= 0); 1947 } 1948 1949 oop java_lang_reflect_Constructor::annotations(oop constructor) { 1950 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1951 assert(has_annotations_field(), "annotations field must be present"); 1952 return constructor->obj_field(annotations_offset); 1953 } 1954 1955 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 1956 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1957 assert(has_annotations_field(), "annotations field must be present"); 1958 constructor->obj_field_put(annotations_offset, value); 1959 } 1960 1961 bool java_lang_reflect_Constructor::has_parameter_annotations_field() { 1962 return (parameter_annotations_offset >= 0); 1963 } 1964 1965 oop java_lang_reflect_Constructor::parameter_annotations(oop method) { 1966 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1967 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 1968 return method->obj_field(parameter_annotations_offset); 1969 } 1970 1971 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 1972 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1973 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 1974 method->obj_field_put(parameter_annotations_offset, value); 1975 } 1976 1977 void java_lang_reflect_Field::compute_offsets() { 1978 klassOop k = SystemDictionary::reflect_Field_klass(); 1979 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 1980 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1981 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature()); 1982 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 1983 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 1984 // The generic signature and annotations fields are only present in 1.5 1985 signature_offset = -1; 1986 annotations_offset = -1; 1987 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 1988 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 1989 } 1990 1991 Handle java_lang_reflect_Field::create(TRAPS) { 1992 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1993 Symbol* name = vmSymbols::java_lang_reflect_Field(); 1994 klassOop k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 1995 instanceKlassHandle klass (THREAD, k); 1996 // Ensure it is initialized 1997 klass->initialize(CHECK_NH); 1998 return klass->allocate_instance_handle(CHECK_NH); 1999 } 2000 2001 oop java_lang_reflect_Field::clazz(oop reflect) { 2002 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2003 return reflect->obj_field(clazz_offset); 2004 } 2005 2006 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 2007 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2008 reflect->obj_field_put(clazz_offset, value); 2009 } 2010 2011 oop java_lang_reflect_Field::name(oop field) { 2012 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2013 return field->obj_field(name_offset); 2014 } 2015 2016 void java_lang_reflect_Field::set_name(oop field, oop value) { 2017 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2018 field->obj_field_put(name_offset, value); 2019 } 2020 2021 oop java_lang_reflect_Field::type(oop field) { 2022 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2023 return field->obj_field(type_offset); 2024 } 2025 2026 void java_lang_reflect_Field::set_type(oop field, oop value) { 2027 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2028 field->obj_field_put(type_offset, value); 2029 } 2030 2031 int java_lang_reflect_Field::slot(oop reflect) { 2032 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2033 return reflect->int_field(slot_offset); 2034 } 2035 2036 void java_lang_reflect_Field::set_slot(oop reflect, int value) { 2037 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2038 reflect->int_field_put(slot_offset, value); 2039 } 2040 2041 int java_lang_reflect_Field::modifiers(oop field) { 2042 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2043 return field->int_field(modifiers_offset); 2044 } 2045 2046 void java_lang_reflect_Field::set_modifiers(oop field, int value) { 2047 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2048 field->int_field_put(modifiers_offset, value); 2049 } 2050 2051 bool java_lang_reflect_Field::has_signature_field() { 2052 return (signature_offset >= 0); 2053 } 2054 2055 oop java_lang_reflect_Field::signature(oop field) { 2056 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2057 assert(has_signature_field(), "signature field must be present"); 2058 return field->obj_field(signature_offset); 2059 } 2060 2061 void java_lang_reflect_Field::set_signature(oop field, oop value) { 2062 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2063 assert(has_signature_field(), "signature field must be present"); 2064 field->obj_field_put(signature_offset, value); 2065 } 2066 2067 bool java_lang_reflect_Field::has_annotations_field() { 2068 return (annotations_offset >= 0); 2069 } 2070 2071 oop java_lang_reflect_Field::annotations(oop field) { 2072 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2073 assert(has_annotations_field(), "annotations field must be present"); 2074 return field->obj_field(annotations_offset); 2075 } 2076 2077 void java_lang_reflect_Field::set_annotations(oop field, oop value) { 2078 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2079 assert(has_annotations_field(), "annotations field must be present"); 2080 field->obj_field_put(annotations_offset, value); 2081 } 2082 2083 2084 void sun_reflect_ConstantPool::compute_offsets() { 2085 klassOop k = SystemDictionary::reflect_ConstantPool_klass(); 2086 // This null test can be removed post beta 2087 if (k != NULL) { 2088 compute_offset(_cp_oop_offset, k, vmSymbols::constantPoolOop_name(), vmSymbols::object_signature()); 2089 } 2090 } 2091 2092 2093 Handle sun_reflect_ConstantPool::create(TRAPS) { 2094 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2095 klassOop k = SystemDictionary::reflect_ConstantPool_klass(); 2096 instanceKlassHandle klass (THREAD, k); 2097 // Ensure it is initialized 2098 klass->initialize(CHECK_NH); 2099 return klass->allocate_instance_handle(CHECK_NH); 2100 } 2101 2102 2103 oop sun_reflect_ConstantPool::cp_oop(oop reflect) { 2104 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2105 return reflect->obj_field(_cp_oop_offset); 2106 } 2107 2108 2109 void sun_reflect_ConstantPool::set_cp_oop(oop reflect, oop value) { 2110 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2111 reflect->obj_field_put(_cp_oop_offset, value); 2112 } 2113 2114 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() { 2115 klassOop k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass(); 2116 // This null test can be removed post beta 2117 if (k != NULL) { 2118 compute_offset(_base_offset, k, 2119 vmSymbols::base_name(), vmSymbols::object_signature()); 2120 } 2121 } 2122 2123 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 2124 klassOop k = SystemDictionary::box_klass(type); 2125 if (k == NULL) return NULL; 2126 instanceKlassHandle h (THREAD, k); 2127 if (!h->is_initialized()) h->initialize(CHECK_0); 2128 return h->allocate_instance(THREAD); 2129 } 2130 2131 2132 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 2133 oop box = initialize_and_allocate(type, CHECK_0); 2134 if (box == NULL) return NULL; 2135 switch (type) { 2136 case T_BOOLEAN: 2137 box->bool_field_put(value_offset, value->z); 2138 break; 2139 case T_CHAR: 2140 box->char_field_put(value_offset, value->c); 2141 break; 2142 case T_FLOAT: 2143 box->float_field_put(value_offset, value->f); 2144 break; 2145 case T_DOUBLE: 2146 box->double_field_put(long_value_offset, value->d); 2147 break; 2148 case T_BYTE: 2149 box->byte_field_put(value_offset, value->b); 2150 break; 2151 case T_SHORT: 2152 box->short_field_put(value_offset, value->s); 2153 break; 2154 case T_INT: 2155 box->int_field_put(value_offset, value->i); 2156 break; 2157 case T_LONG: 2158 box->long_field_put(long_value_offset, value->j); 2159 break; 2160 default: 2161 return NULL; 2162 } 2163 return box; 2164 } 2165 2166 2167 BasicType java_lang_boxing_object::basic_type(oop box) { 2168 if (box == NULL) return T_ILLEGAL; 2169 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2170 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 2171 return T_ILLEGAL; 2172 return type; 2173 } 2174 2175 2176 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 2177 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2178 switch (type) { 2179 case T_BOOLEAN: 2180 value->z = box->bool_field(value_offset); 2181 break; 2182 case T_CHAR: 2183 value->c = box->char_field(value_offset); 2184 break; 2185 case T_FLOAT: 2186 value->f = box->float_field(value_offset); 2187 break; 2188 case T_DOUBLE: 2189 value->d = box->double_field(long_value_offset); 2190 break; 2191 case T_BYTE: 2192 value->b = box->byte_field(value_offset); 2193 break; 2194 case T_SHORT: 2195 value->s = box->short_field(value_offset); 2196 break; 2197 case T_INT: 2198 value->i = box->int_field(value_offset); 2199 break; 2200 case T_LONG: 2201 value->j = box->long_field(long_value_offset); 2202 break; 2203 default: 2204 return T_ILLEGAL; 2205 } // end switch 2206 return type; 2207 } 2208 2209 2210 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 2211 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2212 switch (type) { 2213 case T_BOOLEAN: 2214 box->bool_field_put(value_offset, value->z); 2215 break; 2216 case T_CHAR: 2217 box->char_field_put(value_offset, value->c); 2218 break; 2219 case T_FLOAT: 2220 box->float_field_put(value_offset, value->f); 2221 break; 2222 case T_DOUBLE: 2223 box->double_field_put(long_value_offset, value->d); 2224 break; 2225 case T_BYTE: 2226 box->byte_field_put(value_offset, value->b); 2227 break; 2228 case T_SHORT: 2229 box->short_field_put(value_offset, value->s); 2230 break; 2231 case T_INT: 2232 box->int_field_put(value_offset, value->i); 2233 break; 2234 case T_LONG: 2235 box->long_field_put(long_value_offset, value->j); 2236 break; 2237 default: 2238 return T_ILLEGAL; 2239 } // end switch 2240 return type; 2241 } 2242 2243 2244 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) { 2245 switch (type) { 2246 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break; 2247 case T_CHAR: st->print("%d", value->c); break; 2248 case T_BYTE: st->print("%d", value->b); break; 2249 case T_SHORT: st->print("%d", value->s); break; 2250 case T_INT: st->print("%d", value->i); break; 2251 case T_LONG: st->print(INT64_FORMAT, value->j); break; 2252 case T_FLOAT: st->print("%f", value->f); break; 2253 case T_DOUBLE: st->print("%lf", value->d); break; 2254 default: st->print("type %d?", type); break; 2255 } 2256 } 2257 2258 2259 // Support for java_lang_ref_Reference 2260 oop java_lang_ref_Reference::pending_list_lock() { 2261 instanceKlass* ik = instanceKlass::cast(SystemDictionary::Reference_klass()); 2262 address addr = ik->static_field_addr(static_lock_offset); 2263 if (UseCompressedOops) { 2264 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 2265 } else { 2266 return oopDesc::load_decode_heap_oop((oop*)addr); 2267 } 2268 } 2269 2270 HeapWord *java_lang_ref_Reference::pending_list_addr() { 2271 instanceKlass* ik = instanceKlass::cast(SystemDictionary::Reference_klass()); 2272 address addr = ik->static_field_addr(static_pending_offset); 2273 // XXX This might not be HeapWord aligned, almost rather be char *. 2274 return (HeapWord*)addr; 2275 } 2276 2277 oop java_lang_ref_Reference::pending_list() { 2278 char *addr = (char *)pending_list_addr(); 2279 if (UseCompressedOops) { 2280 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 2281 } else { 2282 return oopDesc::load_decode_heap_oop((oop*)addr); 2283 } 2284 } 2285 2286 2287 // Support for java_lang_ref_SoftReference 2288 2289 jlong java_lang_ref_SoftReference::timestamp(oop ref) { 2290 return ref->long_field(timestamp_offset); 2291 } 2292 2293 jlong java_lang_ref_SoftReference::clock() { 2294 instanceKlass* ik = instanceKlass::cast(SystemDictionary::SoftReference_klass()); 2295 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset); 2296 return *offset; 2297 } 2298 2299 void java_lang_ref_SoftReference::set_clock(jlong value) { 2300 instanceKlass* ik = instanceKlass::cast(SystemDictionary::SoftReference_klass()); 2301 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset); 2302 *offset = value; 2303 } 2304 2305 2306 // Support for java_lang_invoke_MethodHandle 2307 2308 int java_lang_invoke_MethodHandle::_type_offset; 2309 int java_lang_invoke_MethodHandle::_vmtarget_offset; 2310 int java_lang_invoke_MethodHandle::_vmentry_offset; 2311 int java_lang_invoke_MethodHandle::_vmslots_offset; 2312 2313 int java_lang_invoke_MemberName::_clazz_offset; 2314 int java_lang_invoke_MemberName::_name_offset; 2315 int java_lang_invoke_MemberName::_type_offset; 2316 int java_lang_invoke_MemberName::_flags_offset; 2317 int java_lang_invoke_MemberName::_vmtarget_offset; 2318 int java_lang_invoke_MemberName::_vmindex_offset; 2319 2320 int java_lang_invoke_DirectMethodHandle::_vmindex_offset; 2321 2322 int java_lang_invoke_BoundMethodHandle::_argument_offset; 2323 int java_lang_invoke_BoundMethodHandle::_vmargslot_offset; 2324 2325 int java_lang_invoke_AdapterMethodHandle::_conversion_offset; 2326 2327 int java_lang_invoke_CountingMethodHandle::_vmcount_offset; 2328 2329 void java_lang_invoke_MethodHandle::compute_offsets() { 2330 klassOop k = SystemDictionary::MethodHandle_klass(); 2331 if (k != NULL && EnableInvokeDynamic) { 2332 bool allow_super = false; 2333 compute_offset(_type_offset, k, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature(), allow_super); 2334 compute_offset(_vmtarget_offset, k, vmSymbols::vmtarget_name(), vmSymbols::object_signature(), allow_super); 2335 compute_offset(_vmentry_offset, k, vmSymbols::vmentry_name(), vmSymbols::machine_word_signature(), allow_super); 2336 2337 // Note: MH.vmslots (if it is present) is a hoisted copy of MH.type.form.vmslots. 2338 // It is optional pending experiments to keep or toss. 2339 compute_optional_offset(_vmslots_offset, k, vmSymbols::vmslots_name(), vmSymbols::int_signature(), allow_super); 2340 } 2341 } 2342 2343 void java_lang_invoke_MemberName::compute_offsets() { 2344 klassOop k = SystemDictionary::MemberName_klass(); 2345 if (k != NULL && EnableInvokeDynamic) { 2346 compute_offset(_clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2347 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2348 compute_offset(_type_offset, k, vmSymbols::type_name(), vmSymbols::object_signature()); 2349 compute_offset(_flags_offset, k, vmSymbols::flags_name(), vmSymbols::int_signature()); 2350 compute_offset(_vmtarget_offset, k, vmSymbols::vmtarget_name(), vmSymbols::object_signature()); 2351 compute_offset(_vmindex_offset, k, vmSymbols::vmindex_name(), vmSymbols::int_signature()); 2352 } 2353 } 2354 2355 void java_lang_invoke_DirectMethodHandle::compute_offsets() { 2356 klassOop k = SystemDictionary::DirectMethodHandle_klass(); 2357 if (k != NULL && EnableInvokeDynamic) { 2358 compute_offset(_vmindex_offset, k, vmSymbols::vmindex_name(), vmSymbols::int_signature(), true); 2359 } 2360 } 2361 2362 void java_lang_invoke_BoundMethodHandle::compute_offsets() { 2363 klassOop k = SystemDictionary::BoundMethodHandle_klass(); 2364 if (k != NULL && EnableInvokeDynamic) { 2365 compute_offset(_vmargslot_offset, k, vmSymbols::vmargslot_name(), vmSymbols::int_signature(), true); 2366 compute_offset(_argument_offset, k, vmSymbols::argument_name(), vmSymbols::object_signature(), true); 2367 } 2368 } 2369 2370 void java_lang_invoke_AdapterMethodHandle::compute_offsets() { 2371 klassOop k = SystemDictionary::AdapterMethodHandle_klass(); 2372 if (k != NULL && EnableInvokeDynamic) { 2373 compute_offset(_conversion_offset, k, vmSymbols::conversion_name(), vmSymbols::int_signature(), true); 2374 } 2375 } 2376 2377 void java_lang_invoke_CountingMethodHandle::compute_offsets() { 2378 klassOop k = SystemDictionary::CountingMethodHandle_klass(); 2379 if (k != NULL && EnableInvokeDynamic) { 2380 compute_offset(_vmcount_offset, k, vmSymbols::vmcount_name(), vmSymbols::int_signature(), true); 2381 } 2382 } 2383 2384 int java_lang_invoke_CountingMethodHandle::vmcount(oop mh) { 2385 assert(is_instance(mh), "CMH only"); 2386 return mh->int_field(_vmcount_offset); 2387 } 2388 2389 void java_lang_invoke_CountingMethodHandle::set_vmcount(oop mh, int count) { 2390 assert(is_instance(mh), "CMH only"); 2391 mh->int_field_put(_vmcount_offset, count); 2392 } 2393 2394 oop java_lang_invoke_MethodHandle::type(oop mh) { 2395 return mh->obj_field(_type_offset); 2396 } 2397 2398 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) { 2399 mh->obj_field_put(_type_offset, mtype); 2400 } 2401 2402 int java_lang_invoke_MethodHandle::vmslots(oop mh) { 2403 int vmslots_offset = _vmslots_offset; 2404 if (vmslots_offset != 0) { 2405 #ifdef ASSERT 2406 int x = mh->int_field(vmslots_offset); 2407 int y = compute_vmslots(mh); 2408 assert(x == y, "correct hoisted value"); 2409 #endif 2410 return mh->int_field(vmslots_offset); 2411 } else { 2412 return compute_vmslots(mh); 2413 } 2414 } 2415 2416 // if MH.vmslots exists, hoist into it the value of type.form.vmslots 2417 void java_lang_invoke_MethodHandle::init_vmslots(oop mh) { 2418 int vmslots_offset = _vmslots_offset; 2419 if (vmslots_offset != 0) { 2420 mh->int_field_put(vmslots_offset, compute_vmslots(mh)); 2421 } 2422 } 2423 2424 // fetch type.form.vmslots, which is the number of JVM stack slots 2425 // required to carry the arguments of this MH 2426 int java_lang_invoke_MethodHandle::compute_vmslots(oop mh) { 2427 oop mtype = type(mh); 2428 if (mtype == NULL) return 0; // Java code would get NPE 2429 oop form = java_lang_invoke_MethodType::form(mtype); 2430 if (form == NULL) return 0; // Java code would get NPE 2431 return java_lang_invoke_MethodTypeForm::vmslots(form); 2432 } 2433 2434 // fetch the low-level entry point for this mh 2435 MethodHandleEntry* java_lang_invoke_MethodHandle::vmentry(oop mh) { 2436 return (MethodHandleEntry*) mh->address_field(_vmentry_offset); 2437 } 2438 2439 void java_lang_invoke_MethodHandle::set_vmentry(oop mh, MethodHandleEntry* me) { 2440 assert(_vmentry_offset != 0, "must be present"); 2441 2442 // This is always the final step that initializes a valid method handle: 2443 mh->release_address_field_put(_vmentry_offset, (address) me); 2444 2445 // There should be enough memory barriers on exit from native methods 2446 // to ensure that the MH is fully initialized to all threads before 2447 // Java code can publish it in global data structures. 2448 // But just in case, we use release_address_field_put. 2449 } 2450 2451 /// MemberName accessors 2452 2453 oop java_lang_invoke_MemberName::clazz(oop mname) { 2454 assert(is_instance(mname), "wrong type"); 2455 return mname->obj_field(_clazz_offset); 2456 } 2457 2458 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) { 2459 assert(is_instance(mname), "wrong type"); 2460 mname->obj_field_put(_clazz_offset, clazz); 2461 } 2462 2463 oop java_lang_invoke_MemberName::name(oop mname) { 2464 assert(is_instance(mname), "wrong type"); 2465 return mname->obj_field(_name_offset); 2466 } 2467 2468 void java_lang_invoke_MemberName::set_name(oop mname, oop name) { 2469 assert(is_instance(mname), "wrong type"); 2470 mname->obj_field_put(_name_offset, name); 2471 } 2472 2473 oop java_lang_invoke_MemberName::type(oop mname) { 2474 assert(is_instance(mname), "wrong type"); 2475 return mname->obj_field(_type_offset); 2476 } 2477 2478 void java_lang_invoke_MemberName::set_type(oop mname, oop type) { 2479 assert(is_instance(mname), "wrong type"); 2480 mname->obj_field_put(_type_offset, type); 2481 } 2482 2483 int java_lang_invoke_MemberName::flags(oop mname) { 2484 assert(is_instance(mname), "wrong type"); 2485 return mname->int_field(_flags_offset); 2486 } 2487 2488 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) { 2489 assert(is_instance(mname), "wrong type"); 2490 mname->int_field_put(_flags_offset, flags); 2491 } 2492 2493 oop java_lang_invoke_MemberName::vmtarget(oop mname) { 2494 assert(is_instance(mname), "wrong type"); 2495 return mname->obj_field(_vmtarget_offset); 2496 } 2497 2498 void java_lang_invoke_MemberName::set_vmtarget(oop mname, oop ref) { 2499 assert(is_instance(mname), "wrong type"); 2500 mname->obj_field_put(_vmtarget_offset, ref); 2501 } 2502 2503 int java_lang_invoke_MemberName::vmindex(oop mname) { 2504 assert(is_instance(mname), "wrong type"); 2505 return mname->int_field(_vmindex_offset); 2506 } 2507 2508 void java_lang_invoke_MemberName::set_vmindex(oop mname, int index) { 2509 assert(is_instance(mname), "wrong type"); 2510 mname->int_field_put(_vmindex_offset, index); 2511 } 2512 2513 oop java_lang_invoke_MethodHandle::vmtarget(oop mh) { 2514 assert(is_instance(mh), "MH only"); 2515 return mh->obj_field(_vmtarget_offset); 2516 } 2517 2518 void java_lang_invoke_MethodHandle::set_vmtarget(oop mh, oop ref) { 2519 assert(is_instance(mh), "MH only"); 2520 mh->obj_field_put(_vmtarget_offset, ref); 2521 } 2522 2523 int java_lang_invoke_DirectMethodHandle::vmindex(oop mh) { 2524 assert(is_instance(mh), "DMH only"); 2525 return mh->int_field(_vmindex_offset); 2526 } 2527 2528 void java_lang_invoke_DirectMethodHandle::set_vmindex(oop mh, int index) { 2529 assert(is_instance(mh), "DMH only"); 2530 mh->int_field_put(_vmindex_offset, index); 2531 } 2532 2533 int java_lang_invoke_BoundMethodHandle::vmargslot(oop mh) { 2534 assert(is_instance(mh), "BMH only"); 2535 return mh->int_field(_vmargslot_offset); 2536 } 2537 2538 oop java_lang_invoke_BoundMethodHandle::argument(oop mh) { 2539 assert(is_instance(mh), "BMH only"); 2540 return mh->obj_field(_argument_offset); 2541 } 2542 2543 int java_lang_invoke_AdapterMethodHandle::conversion(oop mh) { 2544 assert(is_instance(mh), "AMH only"); 2545 return mh->int_field(_conversion_offset); 2546 } 2547 2548 void java_lang_invoke_AdapterMethodHandle::set_conversion(oop mh, int conv) { 2549 assert(is_instance(mh), "AMH only"); 2550 mh->int_field_put(_conversion_offset, conv); 2551 } 2552 2553 2554 // Support for java_lang_invoke_MethodType 2555 2556 int java_lang_invoke_MethodType::_rtype_offset; 2557 int java_lang_invoke_MethodType::_ptypes_offset; 2558 int java_lang_invoke_MethodType::_form_offset; 2559 2560 void java_lang_invoke_MethodType::compute_offsets() { 2561 klassOop k = SystemDictionary::MethodType_klass(); 2562 if (k != NULL) { 2563 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature()); 2564 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature()); 2565 compute_offset(_form_offset, k, vmSymbols::form_name(), vmSymbols::java_lang_invoke_MethodTypeForm_signature()); 2566 } 2567 } 2568 2569 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) { 2570 st->print("("); 2571 objArrayOop pts = ptypes(mt); 2572 for (int i = 0, limit = pts->length(); i < limit; i++) { 2573 java_lang_Class::print_signature(pts->obj_at(i), st); 2574 } 2575 st->print(")"); 2576 java_lang_Class::print_signature(rtype(mt), st); 2577 } 2578 2579 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) { 2580 ResourceMark rm; 2581 stringStream buffer(128); 2582 print_signature(mt, &buffer); 2583 const char* sigstr = buffer.base(); 2584 int siglen = (int) buffer.size(); 2585 Symbol *name; 2586 if (!intern_if_not_found) { 2587 name = SymbolTable::probe(sigstr, siglen); 2588 } else { 2589 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 2590 } 2591 return name; 2592 } 2593 2594 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) { 2595 if (rtype(mt1) != rtype(mt2)) 2596 return false; 2597 if (ptype_count(mt1) != ptype_count(mt2)) 2598 return false; 2599 for (int i = ptype_count(mt1) - 1; i >= 0; i--) { 2600 if (ptype(mt1, i) != ptype(mt2, i)) 2601 return false; 2602 } 2603 return true; 2604 } 2605 2606 oop java_lang_invoke_MethodType::rtype(oop mt) { 2607 assert(is_instance(mt), "must be a MethodType"); 2608 return mt->obj_field(_rtype_offset); 2609 } 2610 2611 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) { 2612 assert(is_instance(mt), "must be a MethodType"); 2613 return (objArrayOop) mt->obj_field(_ptypes_offset); 2614 } 2615 2616 oop java_lang_invoke_MethodType::form(oop mt) { 2617 assert(is_instance(mt), "must be a MethodType"); 2618 return mt->obj_field(_form_offset); 2619 } 2620 2621 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) { 2622 return ptypes(mt)->obj_at(idx); 2623 } 2624 2625 int java_lang_invoke_MethodType::ptype_count(oop mt) { 2626 return ptypes(mt)->length(); 2627 } 2628 2629 2630 2631 // Support for java_lang_invoke_MethodTypeForm 2632 2633 int java_lang_invoke_MethodTypeForm::_vmslots_offset; 2634 int java_lang_invoke_MethodTypeForm::_vmlayout_offset; 2635 int java_lang_invoke_MethodTypeForm::_erasedType_offset; 2636 int java_lang_invoke_MethodTypeForm::_genericInvoker_offset; 2637 2638 void java_lang_invoke_MethodTypeForm::compute_offsets() { 2639 klassOop k = SystemDictionary::MethodTypeForm_klass(); 2640 if (k != NULL) { 2641 compute_optional_offset(_vmslots_offset, k, vmSymbols::vmslots_name(), vmSymbols::int_signature(), true); 2642 compute_optional_offset(_vmlayout_offset, k, vmSymbols::vmlayout_name(), vmSymbols::object_signature()); 2643 compute_optional_offset(_erasedType_offset, k, vmSymbols::erasedType_name(), vmSymbols::java_lang_invoke_MethodType_signature(), true); 2644 compute_optional_offset(_genericInvoker_offset, k, vmSymbols::genericInvoker_name(), vmSymbols::java_lang_invoke_MethodHandle_signature(), true); 2645 if (_genericInvoker_offset == 0) _genericInvoker_offset = -1; // set to explicit "empty" value 2646 } 2647 } 2648 2649 int java_lang_invoke_MethodTypeForm::vmslots(oop mtform) { 2650 assert(mtform->klass() == SystemDictionary::MethodTypeForm_klass(), "MTForm only"); 2651 assert(_vmslots_offset > 0, ""); 2652 return mtform->int_field(_vmslots_offset); 2653 } 2654 2655 oop java_lang_invoke_MethodTypeForm::vmlayout(oop mtform) { 2656 assert(mtform->klass() == SystemDictionary::MethodTypeForm_klass(), "MTForm only"); 2657 assert(_vmlayout_offset > 0, ""); 2658 return mtform->obj_field(_vmlayout_offset); 2659 } 2660 2661 oop java_lang_invoke_MethodTypeForm::init_vmlayout(oop mtform, oop cookie) { 2662 assert(mtform->klass() == SystemDictionary::MethodTypeForm_klass(), "MTForm only"); 2663 oop previous = vmlayout(mtform); 2664 if (previous != NULL) { 2665 return previous; // someone else beat us to it 2666 } 2667 HeapWord* cookie_addr = (HeapWord*) mtform->obj_field_addr<oop>(_vmlayout_offset); 2668 OrderAccess::storestore(); // make sure our copy is fully committed 2669 previous = oopDesc::atomic_compare_exchange_oop(cookie, cookie_addr, previous); 2670 if (previous != NULL) { 2671 return previous; // someone else beat us to it 2672 } 2673 return cookie; 2674 } 2675 2676 oop java_lang_invoke_MethodTypeForm::erasedType(oop mtform) { 2677 assert(mtform->klass() == SystemDictionary::MethodTypeForm_klass(), "MTForm only"); 2678 return mtform->obj_field(_erasedType_offset); 2679 } 2680 2681 oop java_lang_invoke_MethodTypeForm::genericInvoker(oop mtform) { 2682 assert(mtform->klass() == SystemDictionary::MethodTypeForm_klass(), "MTForm only"); 2683 return mtform->obj_field(_genericInvoker_offset); 2684 } 2685 2686 2687 // Support for java_lang_invoke_CallSite 2688 2689 int java_lang_invoke_CallSite::_target_offset; 2690 2691 void java_lang_invoke_CallSite::compute_offsets() { 2692 if (!EnableInvokeDynamic) return; 2693 klassOop k = SystemDictionary::CallSite_klass(); 2694 if (k != NULL) { 2695 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature()); 2696 } 2697 2698 // Disallow compilation of CallSite.setTargetNormal and CallSite.setTargetVolatile 2699 // (For C2: keep this until we have throttling logic for uncommon traps.) 2700 if (k != NULL) { 2701 instanceKlass* ik = instanceKlass::cast(k); 2702 methodOop m_normal = ik->lookup_method(vmSymbols::setTargetNormal_name(), vmSymbols::setTarget_signature()); 2703 methodOop m_volatile = ik->lookup_method(vmSymbols::setTargetVolatile_name(), vmSymbols::setTarget_signature()); 2704 guarantee(m_normal && m_volatile, "must exist"); 2705 m_normal->set_not_compilable_quietly(); 2706 m_volatile->set_not_compilable_quietly(); 2707 } 2708 } 2709 2710 oop java_lang_invoke_CallSite::target(oop site) { 2711 return site->obj_field(_target_offset); 2712 } 2713 2714 void java_lang_invoke_CallSite::set_target(oop site, oop target) { 2715 site->obj_field_put(_target_offset, target); 2716 } 2717 2718 2719 // Support for java_security_AccessControlContext 2720 2721 int java_security_AccessControlContext::_context_offset = 0; 2722 int java_security_AccessControlContext::_privilegedContext_offset = 0; 2723 int java_security_AccessControlContext::_isPrivileged_offset = 0; 2724 2725 void java_security_AccessControlContext::compute_offsets() { 2726 assert(_isPrivileged_offset == 0, "offsets should be initialized only once"); 2727 fieldDescriptor fd; 2728 instanceKlass* ik = instanceKlass::cast(SystemDictionary::AccessControlContext_klass()); 2729 2730 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) { 2731 fatal("Invalid layout of java.security.AccessControlContext"); 2732 } 2733 _context_offset = fd.offset(); 2734 2735 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) { 2736 fatal("Invalid layout of java.security.AccessControlContext"); 2737 } 2738 _privilegedContext_offset = fd.offset(); 2739 2740 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) { 2741 fatal("Invalid layout of java.security.AccessControlContext"); 2742 } 2743 _isPrivileged_offset = fd.offset(); 2744 } 2745 2746 2747 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) { 2748 assert(_isPrivileged_offset != 0, "offsets should have been initialized"); 2749 // Ensure klass is initialized 2750 instanceKlass::cast(SystemDictionary::AccessControlContext_klass())->initialize(CHECK_0); 2751 // Allocate result 2752 oop result = instanceKlass::cast(SystemDictionary::AccessControlContext_klass())->allocate_instance(CHECK_0); 2753 // Fill in values 2754 result->obj_field_put(_context_offset, context()); 2755 result->obj_field_put(_privilegedContext_offset, privileged_context()); 2756 result->bool_field_put(_isPrivileged_offset, isPrivileged); 2757 return result; 2758 } 2759 2760 2761 // Support for java_lang_ClassLoader 2762 2763 oop java_lang_ClassLoader::parent(oop loader) { 2764 assert(loader->is_oop(), "loader must be oop"); 2765 return loader->obj_field(parent_offset); 2766 } 2767 2768 2769 bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 2770 // Fix for 4474172; see evaluation for more details 2771 loader = non_reflection_class_loader(loader); 2772 2773 oop cl = SystemDictionary::java_system_loader(); 2774 while(cl != NULL) { 2775 if (cl == loader) return true; 2776 cl = parent(cl); 2777 } 2778 return false; 2779 } 2780 2781 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) { 2782 if (loader != NULL) { 2783 // See whether this is one of the class loaders associated with 2784 // the generated bytecodes for reflection, and if so, "magically" 2785 // delegate to its parent to prevent class loading from occurring 2786 // in places where applications using reflection didn't expect it. 2787 klassOop delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass(); 2788 // This might be null in non-1.4 JDKs 2789 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) { 2790 return parent(loader); 2791 } 2792 } 2793 return loader; 2794 } 2795 2796 2797 // Support for java_lang_System 2798 int java_lang_System::in_offset_in_bytes() { 2799 return (instanceMirrorKlass::offset_of_static_fields() + static_in_offset); 2800 } 2801 2802 2803 int java_lang_System::out_offset_in_bytes() { 2804 return (instanceMirrorKlass::offset_of_static_fields() + static_out_offset); 2805 } 2806 2807 2808 int java_lang_System::err_offset_in_bytes() { 2809 return (instanceMirrorKlass::offset_of_static_fields() + static_err_offset); 2810 } 2811 2812 2813 2814 int java_lang_String::value_offset; 2815 int java_lang_String::offset_offset; 2816 int java_lang_String::count_offset; 2817 int java_lang_String::hash_offset; 2818 int java_lang_Class::klass_offset; 2819 int java_lang_Class::array_klass_offset; 2820 int java_lang_Class::resolved_constructor_offset; 2821 int java_lang_Class::number_of_fake_oop_fields; 2822 int java_lang_Class::oop_size_offset; 2823 int java_lang_Class::static_oop_field_count_offset; 2824 int java_lang_Throwable::backtrace_offset; 2825 int java_lang_Throwable::detailMessage_offset; 2826 int java_lang_Throwable::cause_offset; 2827 int java_lang_Throwable::stackTrace_offset; 2828 int java_lang_Throwable::static_unassigned_stacktrace_offset; 2829 int java_lang_reflect_AccessibleObject::override_offset; 2830 int java_lang_reflect_Method::clazz_offset; 2831 int java_lang_reflect_Method::name_offset; 2832 int java_lang_reflect_Method::returnType_offset; 2833 int java_lang_reflect_Method::parameterTypes_offset; 2834 int java_lang_reflect_Method::exceptionTypes_offset; 2835 int java_lang_reflect_Method::slot_offset; 2836 int java_lang_reflect_Method::modifiers_offset; 2837 int java_lang_reflect_Method::signature_offset; 2838 int java_lang_reflect_Method::annotations_offset; 2839 int java_lang_reflect_Method::parameter_annotations_offset; 2840 int java_lang_reflect_Method::annotation_default_offset; 2841 int java_lang_reflect_Constructor::clazz_offset; 2842 int java_lang_reflect_Constructor::parameterTypes_offset; 2843 int java_lang_reflect_Constructor::exceptionTypes_offset; 2844 int java_lang_reflect_Constructor::slot_offset; 2845 int java_lang_reflect_Constructor::modifiers_offset; 2846 int java_lang_reflect_Constructor::signature_offset; 2847 int java_lang_reflect_Constructor::annotations_offset; 2848 int java_lang_reflect_Constructor::parameter_annotations_offset; 2849 int java_lang_reflect_Field::clazz_offset; 2850 int java_lang_reflect_Field::name_offset; 2851 int java_lang_reflect_Field::type_offset; 2852 int java_lang_reflect_Field::slot_offset; 2853 int java_lang_reflect_Field::modifiers_offset; 2854 int java_lang_reflect_Field::signature_offset; 2855 int java_lang_reflect_Field::annotations_offset; 2856 int java_lang_boxing_object::value_offset; 2857 int java_lang_boxing_object::long_value_offset; 2858 int java_lang_ref_Reference::referent_offset; 2859 int java_lang_ref_Reference::queue_offset; 2860 int java_lang_ref_Reference::next_offset; 2861 int java_lang_ref_Reference::discovered_offset; 2862 int java_lang_ref_Reference::static_lock_offset; 2863 int java_lang_ref_Reference::static_pending_offset; 2864 int java_lang_ref_Reference::number_of_fake_oop_fields; 2865 int java_lang_ref_SoftReference::timestamp_offset; 2866 int java_lang_ref_SoftReference::static_clock_offset; 2867 int java_lang_ClassLoader::parent_offset; 2868 int java_lang_System::static_in_offset; 2869 int java_lang_System::static_out_offset; 2870 int java_lang_System::static_err_offset; 2871 int java_lang_StackTraceElement::declaringClass_offset; 2872 int java_lang_StackTraceElement::methodName_offset; 2873 int java_lang_StackTraceElement::fileName_offset; 2874 int java_lang_StackTraceElement::lineNumber_offset; 2875 int java_lang_AssertionStatusDirectives::classes_offset; 2876 int java_lang_AssertionStatusDirectives::classEnabled_offset; 2877 int java_lang_AssertionStatusDirectives::packages_offset; 2878 int java_lang_AssertionStatusDirectives::packageEnabled_offset; 2879 int java_lang_AssertionStatusDirectives::deflt_offset; 2880 int java_nio_Buffer::_limit_offset; 2881 int sun_misc_AtomicLongCSImpl::_value_offset; 2882 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0; 2883 int sun_reflect_ConstantPool::_cp_oop_offset; 2884 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset; 2885 2886 2887 // Support for java_lang_StackTraceElement 2888 2889 void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 2890 element->obj_field_put(fileName_offset, value); 2891 } 2892 2893 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 2894 element->obj_field_put(declaringClass_offset, value); 2895 } 2896 2897 void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 2898 element->obj_field_put(methodName_offset, value); 2899 } 2900 2901 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 2902 element->int_field_put(lineNumber_offset, value); 2903 } 2904 2905 2906 // Support for java Assertions - java_lang_AssertionStatusDirectives. 2907 2908 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 2909 o->obj_field_put(classes_offset, val); 2910 } 2911 2912 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 2913 o->obj_field_put(classEnabled_offset, val); 2914 } 2915 2916 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 2917 o->obj_field_put(packages_offset, val); 2918 } 2919 2920 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 2921 o->obj_field_put(packageEnabled_offset, val); 2922 } 2923 2924 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 2925 o->bool_field_put(deflt_offset, val); 2926 } 2927 2928 2929 // Support for intrinsification of java.nio.Buffer.checkIndex 2930 int java_nio_Buffer::limit_offset() { 2931 return _limit_offset; 2932 } 2933 2934 2935 void java_nio_Buffer::compute_offsets() { 2936 klassOop k = SystemDictionary::java_nio_Buffer_klass(); 2937 assert(k != NULL, "must be loaded in 1.4+"); 2938 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature()); 2939 } 2940 2941 // Support for intrinsification of sun.misc.AtomicLongCSImpl.attemptUpdate 2942 int sun_misc_AtomicLongCSImpl::value_offset() { 2943 assert(SystemDictionary::sun_misc_AtomicLongCSImpl_klass() != NULL, "can't call this"); 2944 return _value_offset; 2945 } 2946 2947 2948 void sun_misc_AtomicLongCSImpl::compute_offsets() { 2949 klassOop k = SystemDictionary::sun_misc_AtomicLongCSImpl_klass(); 2950 // If this class is not present, its value field offset won't be referenced. 2951 if (k != NULL) { 2952 compute_offset(_value_offset, k, vmSymbols::value_name(), vmSymbols::long_signature()); 2953 } 2954 } 2955 2956 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) { 2957 if (_owner_offset != 0) return; 2958 2959 assert(JDK_Version::is_gte_jdk16x_version(), "Must be JDK 1.6 or later"); 2960 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK); 2961 klassOop k = SystemDictionary::abstract_ownable_synchronizer_klass(); 2962 compute_offset(_owner_offset, k, 2963 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature()); 2964 } 2965 2966 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 2967 assert(_owner_offset != 0, "Must be initialized"); 2968 return obj->obj_field(_owner_offset); 2969 } 2970 2971 // Compute hard-coded offsets 2972 // Invoked before SystemDictionary::initialize, so pre-loaded classes 2973 // are not available to determine the offset_of_static_fields. 2974 void JavaClasses::compute_hard_coded_offsets() { 2975 const int x = heapOopSize; 2976 const int header = instanceOopDesc::base_offset_in_bytes(); 2977 2978 // Do the String Class 2979 java_lang_String::value_offset = java_lang_String::hc_value_offset * x + header; 2980 java_lang_String::offset_offset = java_lang_String::hc_offset_offset * x + header; 2981 java_lang_String::count_offset = java_lang_String::offset_offset + sizeof (jint); 2982 java_lang_String::hash_offset = java_lang_String::count_offset + sizeof (jint); 2983 2984 { 2985 // Do the Class Class 2986 int offset = header; 2987 java_lang_Class::oop_size_offset = header; 2988 offset += BytesPerInt; 2989 java_lang_Class::static_oop_field_count_offset = offset; 2990 offset = align_size_up(offset + BytesPerInt, x); 2991 java_lang_Class::klass_offset = offset; 2992 offset += x; 2993 java_lang_Class::array_klass_offset = offset; 2994 offset += x; 2995 java_lang_Class::resolved_constructor_offset = offset; 2996 } 2997 2998 // This is NOT an offset 2999 java_lang_Class::number_of_fake_oop_fields = java_lang_Class::hc_number_of_fake_oop_fields; 3000 3001 // Throwable Class 3002 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header; 3003 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header; 3004 java_lang_Throwable::cause_offset = java_lang_Throwable::hc_cause_offset * x + header; 3005 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header; 3006 java_lang_Throwable::static_unassigned_stacktrace_offset = java_lang_Throwable::hc_static_unassigned_stacktrace_offset * x; 3007 3008 // java_lang_boxing_object 3009 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header; 3010 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong); 3011 3012 // java_lang_ref_Reference: 3013 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header; 3014 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header; 3015 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header; 3016 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header; 3017 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x; 3018 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x; 3019 // Artificial fields for java_lang_ref_Reference 3020 // The first field is for the discovered field added in 1.4 3021 java_lang_ref_Reference::number_of_fake_oop_fields = 1; 3022 3023 // java_lang_ref_SoftReference Class 3024 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong); 3025 // Don't multiply static fields because they are always in wordSize units 3026 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x; 3027 3028 // java_lang_ClassLoader 3029 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header; 3030 3031 // java_lang_System 3032 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x; 3033 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x; 3034 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x; 3035 3036 // java_lang_StackTraceElement 3037 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header; 3038 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header; 3039 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header; 3040 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header; 3041 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header; 3042 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header; 3043 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header; 3044 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header; 3045 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header; 3046 3047 } 3048 3049 3050 // Compute non-hard-coded field offsets of all the classes in this file 3051 void JavaClasses::compute_offsets() { 3052 3053 java_lang_Class::compute_offsets(); 3054 java_lang_Thread::compute_offsets(); 3055 java_lang_ThreadGroup::compute_offsets(); 3056 if (EnableInvokeDynamic) { 3057 java_lang_invoke_MethodHandle::compute_offsets(); 3058 java_lang_invoke_MemberName::compute_offsets(); 3059 java_lang_invoke_DirectMethodHandle::compute_offsets(); 3060 java_lang_invoke_BoundMethodHandle::compute_offsets(); 3061 java_lang_invoke_AdapterMethodHandle::compute_offsets(); 3062 java_lang_invoke_MethodType::compute_offsets(); 3063 java_lang_invoke_MethodTypeForm::compute_offsets(); 3064 java_lang_invoke_CallSite::compute_offsets(); 3065 java_lang_invoke_CountingMethodHandle::compute_offsets(); 3066 } 3067 java_security_AccessControlContext::compute_offsets(); 3068 // Initialize reflection classes. The layouts of these classes 3069 // changed with the new reflection implementation in JDK 1.4, and 3070 // since the Universe doesn't know what JDK version it is until this 3071 // point we defer computation of these offsets until now. 3072 java_lang_reflect_AccessibleObject::compute_offsets(); 3073 java_lang_reflect_Method::compute_offsets(); 3074 java_lang_reflect_Constructor::compute_offsets(); 3075 java_lang_reflect_Field::compute_offsets(); 3076 if (JDK_Version::is_gte_jdk14x_version()) { 3077 java_nio_Buffer::compute_offsets(); 3078 } 3079 if (JDK_Version::is_gte_jdk15x_version()) { 3080 sun_reflect_ConstantPool::compute_offsets(); 3081 sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets(); 3082 } 3083 sun_misc_AtomicLongCSImpl::compute_offsets(); 3084 3085 // generated interpreter code wants to know about the offsets we just computed: 3086 AbstractAssembler::update_delayed_values(); 3087 } 3088 3089 #ifndef PRODUCT 3090 3091 // These functions exist to assert the validity of hard-coded field offsets to guard 3092 // against changes in the class files 3093 3094 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 3095 EXCEPTION_MARK; 3096 fieldDescriptor fd; 3097 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3098 klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3099 instanceKlassHandle h_klass (THREAD, k); 3100 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3101 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3102 if (!h_klass->find_local_field(f_name, f_sig, &fd)) { 3103 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 3104 return false; 3105 } 3106 if (fd.is_static()) { 3107 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 3108 return false; 3109 } 3110 if (fd.offset() == hardcoded_offset ) { 3111 return true; 3112 } else { 3113 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.", 3114 klass_name, field_name, hardcoded_offset, fd.offset()); 3115 return false; 3116 } 3117 } 3118 3119 3120 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 3121 EXCEPTION_MARK; 3122 fieldDescriptor fd; 3123 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3124 klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3125 instanceKlassHandle h_klass (THREAD, k); 3126 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3127 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3128 if (!h_klass->find_local_field(f_name, f_sig, &fd)) { 3129 tty->print_cr("Static field %s.%s not found", klass_name, field_name); 3130 return false; 3131 } 3132 if (!fd.is_static()) { 3133 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name); 3134 return false; 3135 } 3136 if (fd.offset() == hardcoded_offset + instanceMirrorKlass::offset_of_static_fields()) { 3137 return true; 3138 } else { 3139 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()); 3140 return false; 3141 } 3142 } 3143 3144 3145 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) { 3146 EXCEPTION_MARK; 3147 fieldDescriptor fd; 3148 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3149 klassOop k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3150 instanceKlassHandle h_klass (THREAD, k); 3151 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3152 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3153 if (!h_klass->find_local_field(f_name, f_sig, &fd)) { 3154 tty->print_cr("Static field %s.%s not found", klass_name, field_name); 3155 return false; 3156 } 3157 if (!fd.is_static() || !fd.has_initial_value()) { 3158 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name); 3159 return false; 3160 } 3161 if (!fd.initial_value_tag().is_int()) { 3162 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name); 3163 return false; 3164 } 3165 jint field_value = fd.int_initial_value(); 3166 if (field_value == hardcoded_constant) { 3167 return true; 3168 } else { 3169 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); 3170 return false; 3171 } 3172 } 3173 3174 3175 // Check the hard-coded field offsets of all the classes in this file 3176 3177 void JavaClasses::check_offsets() { 3178 bool valid = true; 3179 3180 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3181 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig) 3182 3183 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3184 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig) 3185 3186 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3187 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig) 3188 3189 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \ 3190 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig) 3191 3192 // java.lang.String 3193 3194 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C"); 3195 CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I"); 3196 CHECK_OFFSET("java/lang/String", java_lang_String, count, "I"); 3197 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I"); 3198 3199 // java.lang.Class 3200 3201 // Fake fields 3202 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked 3203 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked 3204 // CHECK_OFFSET("java/lang/Class", java_lang_Class, resolved_constructor); // %%% this needs to be checked 3205 3206 // java.lang.Throwable 3207 3208 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;"); 3209 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;"); 3210 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;"); 3211 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;"); 3212 3213 // Boxed primitive objects (java_lang_boxing_object) 3214 3215 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 3216 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 3217 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 3218 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 3219 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 3220 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 3221 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 3222 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 3223 3224 // java.lang.ClassLoader 3225 3226 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;"); 3227 3228 // java.lang.System 3229 3230 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;"); 3231 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;"); 3232 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;"); 3233 3234 // java.lang.StackTraceElement 3235 3236 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;"); 3237 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;"); 3238 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;"); 3239 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I"); 3240 3241 // java.lang.ref.Reference 3242 3243 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;"); 3244 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;"); 3245 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;"); 3246 // Fake field 3247 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;"); 3248 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;"); 3249 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;"); 3250 3251 // java.lang.ref.SoftReference 3252 3253 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J"); 3254 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J"); 3255 3256 // java.lang.AssertionStatusDirectives 3257 // 3258 // The CheckAssertionStatusDirectives boolean can be removed from here and 3259 // globals.hpp after the AssertionStatusDirectives class has been integrated 3260 // into merlin "for some time." Without it, the vm will fail with early 3261 // merlin builds. 3262 3263 if (CheckAssertionStatusDirectives && JDK_Version::is_gte_jdk14x_version()) { 3264 const char* nm = "java/lang/AssertionStatusDirectives"; 3265 const char* sig = "[Ljava/lang/String;"; 3266 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig); 3267 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z"); 3268 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig); 3269 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z"); 3270 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z"); 3271 } 3272 3273 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed"); 3274 } 3275 3276 #endif // PRODUCT 3277 3278 void javaClasses_init() { 3279 JavaClasses::compute_offsets(); 3280 JavaClasses::check_offsets(); 3281 FilteredFieldsMap::initialize(); // must be done after computing offsets. 3282 }