1 /* 2 * Copyright (c) 1997, 2013, 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/altHashing.hpp" 27 #include "classfile/javaClasses.hpp" 28 #include "classfile/symbolTable.hpp" 29 #include "classfile/vmSymbols.hpp" 30 #include "code/debugInfo.hpp" 31 #include "code/pcDesc.hpp" 32 #include "compiler/compilerOracle.hpp" 33 #include "interpreter/interpreter.hpp" 34 #include "memory/oopFactory.hpp" 35 #include "memory/resourceArea.hpp" 36 #include "memory/universe.inline.hpp" 37 #include "oops/fieldStreams.hpp" 38 #include "oops/instanceKlass.hpp" 39 #include "oops/instanceMirrorKlass.hpp" 40 #include "oops/klass.hpp" 41 #include "oops/method.hpp" 42 #include "oops/symbol.hpp" 43 #include "oops/typeArrayOop.hpp" 44 #include "runtime/fieldDescriptor.hpp" 45 #include "runtime/handles.inline.hpp" 46 #include "runtime/interfaceSupport.hpp" 47 #include "runtime/java.hpp" 48 #include "runtime/javaCalls.hpp" 49 #include "runtime/safepoint.hpp" 50 #include "runtime/thread.inline.hpp" 51 #include "runtime/vframe.hpp" 52 #include "utilities/preserveException.hpp" 53 54 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \ 55 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum); 56 57 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \ 58 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java }, 59 60 InjectedField JavaClasses::_injected_fields[] = { 61 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD) 62 }; 63 64 int JavaClasses::compute_injected_offset(InjectedFieldID id) { 65 return _injected_fields[id].compute_offset(); 66 } 67 68 69 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) { 70 *field_count = 0; 71 72 vmSymbols::SID sid = vmSymbols::find_sid(class_name); 73 if (sid == vmSymbols::NO_SID) { 74 // Only well known classes can inject fields 75 return NULL; 76 } 77 78 int count = 0; 79 int start = -1; 80 81 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \ 82 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \ 83 count++; \ 84 if (start == -1) start = klass##_##name##_enum; \ 85 } 86 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD); 87 #undef LOOKUP_INJECTED_FIELD 88 89 if (start != -1) { 90 *field_count = count; 91 return _injected_fields + start; 92 } 93 return NULL; 94 } 95 96 97 static bool find_field(InstanceKlass* ik, 98 Symbol* name_symbol, Symbol* signature_symbol, 99 fieldDescriptor* fd, 100 bool allow_super = false) { 101 if (allow_super) 102 return ik->find_field(name_symbol, signature_symbol, fd) != NULL; 103 else 104 return ik->find_local_field(name_symbol, signature_symbol, fd); 105 } 106 107 // Helpful routine for computing field offsets at run time rather than hardcoding them 108 static void 109 compute_offset(int &dest_offset, 110 Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol, 111 bool allow_super = false) { 112 fieldDescriptor fd; 113 InstanceKlass* ik = InstanceKlass::cast(klass_oop); 114 if (!find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) { 115 ResourceMark rm; 116 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string()); 117 #ifndef PRODUCT 118 klass_oop->print(); 119 tty->print_cr("all fields:"); 120 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) { 121 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 122 } 123 #endif //PRODUCT 124 fatal("Invalid layout of preloaded class"); 125 } 126 dest_offset = fd.offset(); 127 } 128 129 // Same as above but for "optional" offsets that might not be present in certain JDK versions 130 static void 131 compute_optional_offset(int& dest_offset, 132 Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol, 133 bool allow_super = false) { 134 fieldDescriptor fd; 135 InstanceKlass* ik = InstanceKlass::cast(klass_oop); 136 if (find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) { 137 dest_offset = fd.offset(); 138 } 139 } 140 141 142 int java_lang_String::value_offset = 0; 143 int java_lang_String::offset_offset = 0; 144 int java_lang_String::count_offset = 0; 145 int java_lang_String::hash_offset = 0; 146 147 bool java_lang_String::initialized = false; 148 149 void java_lang_String::compute_offsets() { 150 assert(!initialized, "offsets should be initialized only once"); 151 152 Klass* k = SystemDictionary::String_klass(); 153 compute_offset(value_offset, k, vmSymbols::value_name(), vmSymbols::char_array_signature()); 154 compute_optional_offset(offset_offset, k, vmSymbols::offset_name(), vmSymbols::int_signature()); 155 compute_optional_offset(count_offset, k, vmSymbols::count_name(), vmSymbols::int_signature()); 156 compute_optional_offset(hash_offset, k, vmSymbols::hash_name(), vmSymbols::int_signature()); 157 158 initialized = true; 159 } 160 161 Handle java_lang_String::basic_create(int length, TRAPS) { 162 assert(initialized, "Must be initialized"); 163 // Create the String object first, so there's a chance that the String 164 // and the char array it points to end up in the same cache line. 165 oop obj; 166 obj = InstanceKlass::cast(SystemDictionary::String_klass())->allocate_instance(CHECK_NH); 167 168 // Create the char array. The String object must be handlized here 169 // because GC can happen as a result of the allocation attempt. 170 Handle h_obj(THREAD, obj); 171 typeArrayOop buffer; 172 buffer = oopFactory::new_charArray(length, CHECK_NH); 173 174 // Point the String at the char array 175 obj = h_obj(); 176 set_value(obj, buffer); 177 // No need to zero the offset, allocation zero'ed the entire String object 178 assert(offset(obj) == 0, "initial String offset should be zero"); 179 //set_offset(obj, 0); 180 set_count(obj, length); 181 182 return h_obj; 183 } 184 185 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) { 186 Handle h_obj = basic_create(length, CHECK_NH); 187 typeArrayOop buffer = value(h_obj()); 188 for (int index = 0; index < length; index++) { 189 buffer->char_at_put(index, unicode[index]); 190 } 191 return h_obj; 192 } 193 194 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) { 195 Handle h_obj = create_from_unicode(unicode, length, CHECK_0); 196 return h_obj(); 197 } 198 199 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) { 200 if (utf8_str == NULL) { 201 return Handle(); 202 } 203 int length = UTF8::unicode_length(utf8_str); 204 Handle h_obj = basic_create(length, CHECK_NH); 205 if (length > 0) { 206 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 207 } 208 return h_obj; 209 } 210 211 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) { 212 Handle h_obj = create_from_str(utf8_str, CHECK_0); 213 return h_obj(); 214 } 215 216 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) { 217 int length = UTF8::unicode_length((char*)symbol->bytes(), symbol->utf8_length()); 218 Handle h_obj = basic_create(length, CHECK_NH); 219 if (length > 0) { 220 UTF8::convert_to_unicode((char*)symbol->bytes(), value(h_obj())->char_at_addr(0), length); 221 } 222 return h_obj; 223 } 224 225 // Converts a C string to a Java String based on current encoding 226 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) { 227 assert(str != NULL, "bad arguments"); 228 229 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *); 230 static to_java_string_fn_t _to_java_string_fn = NULL; 231 232 if (_to_java_string_fn == NULL) { 233 void *lib_handle = os::native_java_library(); 234 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform")); 235 if (_to_java_string_fn == NULL) { 236 fatal("NewStringPlatform missing"); 237 } 238 } 239 240 jstring js = NULL; 241 { JavaThread* thread = (JavaThread*)THREAD; 242 assert(thread->is_Java_thread(), "must be java thread"); 243 HandleMark hm(thread); 244 ThreadToNativeFromVM ttn(thread); 245 js = (_to_java_string_fn)(thread->jni_environment(), str); 246 } 247 return Handle(THREAD, JNIHandles::resolve(js)); 248 } 249 250 // Converts a Java String to a native C string that can be used for 251 // native OS calls. 252 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) { 253 254 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*); 255 static to_platform_string_fn_t _to_platform_string_fn = NULL; 256 257 if (_to_platform_string_fn == NULL) { 258 void *lib_handle = os::native_java_library(); 259 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars")); 260 if (_to_platform_string_fn == NULL) { 261 fatal("GetStringPlatformChars missing"); 262 } 263 } 264 265 char *native_platform_string; 266 { JavaThread* thread = (JavaThread*)THREAD; 267 assert(thread->is_Java_thread(), "must be java thread"); 268 JNIEnv *env = thread->jni_environment(); 269 jstring js = (jstring) JNIHandles::make_local(env, java_string()); 270 bool is_copy; 271 HandleMark hm(thread); 272 ThreadToNativeFromVM ttn(thread); 273 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy); 274 assert(is_copy == JNI_TRUE, "is_copy value changed"); 275 JNIHandles::destroy_local(js); 276 } 277 return native_platform_string; 278 } 279 280 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) { 281 oop obj = java_string(); 282 // Typical usage is to convert all '/' to '.' in string. 283 typeArrayOop value = java_lang_String::value(obj); 284 int offset = java_lang_String::offset(obj); 285 int length = java_lang_String::length(obj); 286 287 // First check if any from_char exist 288 int index; // Declared outside, used later 289 for (index = 0; index < length; index++) { 290 if (value->char_at(index + offset) == from_char) { 291 break; 292 } 293 } 294 if (index == length) { 295 // No from_char, so do not copy. 296 return java_string; 297 } 298 299 // Create new UNICODE buffer. Must handlize value because GC 300 // may happen during String and char array creation. 301 typeArrayHandle h_value(THREAD, value); 302 Handle string = basic_create(length, CHECK_NH); 303 304 typeArrayOop from_buffer = h_value(); 305 typeArrayOop to_buffer = java_lang_String::value(string()); 306 307 // Copy contents 308 for (index = 0; index < length; index++) { 309 jchar c = from_buffer->char_at(index + offset); 310 if (c == from_char) { 311 c = to_char; 312 } 313 to_buffer->char_at_put(index, c); 314 } 315 return string; 316 } 317 318 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) { 319 typeArrayOop value = java_lang_String::value(java_string); 320 int offset = java_lang_String::offset(java_string); 321 length = java_lang_String::length(java_string); 322 323 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length); 324 if (result != NULL) { 325 for (int index = 0; index < length; index++) { 326 result[index] = value->char_at(index + offset); 327 } 328 } else { 329 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string"); 330 } 331 return result; 332 } 333 334 unsigned int java_lang_String::hash_code(oop java_string) { 335 int length = java_lang_String::length(java_string); 336 // Zero length string will hash to zero with String.hashCode() function. 337 if (length == 0) return 0; 338 339 typeArrayOop value = java_lang_String::value(java_string); 340 int offset = java_lang_String::offset(java_string); 341 return java_lang_String::hash_code(value->char_at_addr(offset), length); 342 } 343 344 char* java_lang_String::as_quoted_ascii(oop java_string) { 345 typeArrayOop value = java_lang_String::value(java_string); 346 int offset = java_lang_String::offset(java_string); 347 int length = java_lang_String::length(java_string); 348 349 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset); 350 if (base == NULL) return NULL; 351 352 int result_length = UNICODE::quoted_ascii_length(base, length) + 1; 353 char* result = NEW_RESOURCE_ARRAY(char, result_length); 354 UNICODE::as_quoted_ascii(base, length, result, result_length); 355 assert(result_length >= length + 1, "must not be shorter"); 356 assert(result_length == (int)strlen(result) + 1, "must match"); 357 return result; 358 } 359 360 unsigned int java_lang_String::hash_string(oop java_string) { 361 int length = java_lang_String::length(java_string); 362 // Zero length string doesn't hash necessarily hash to zero. 363 if (length == 0) { 364 return StringTable::hash_string(NULL, 0); 365 } 366 367 typeArrayOop value = java_lang_String::value(java_string); 368 int offset = java_lang_String::offset(java_string); 369 return StringTable::hash_string(value->char_at_addr(offset), length); 370 } 371 372 Symbol* java_lang_String::as_symbol(Handle java_string, TRAPS) { 373 oop obj = java_string(); 374 typeArrayOop value = java_lang_String::value(obj); 375 int offset = java_lang_String::offset(obj); 376 int length = java_lang_String::length(obj); 377 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset); 378 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD); 379 return sym; 380 } 381 382 Symbol* java_lang_String::as_symbol_or_null(oop java_string) { 383 typeArrayOop value = java_lang_String::value(java_string); 384 int offset = java_lang_String::offset(java_string); 385 int length = java_lang_String::length(java_string); 386 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset); 387 return SymbolTable::probe_unicode(base, length); 388 } 389 390 391 int java_lang_String::utf8_length(oop java_string) { 392 typeArrayOop value = java_lang_String::value(java_string); 393 int offset = java_lang_String::offset(java_string); 394 int length = java_lang_String::length(java_string); 395 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset); 396 return UNICODE::utf8_length(position, length); 397 } 398 399 char* java_lang_String::as_utf8_string(oop java_string) { 400 typeArrayOop value = java_lang_String::value(java_string); 401 int offset = java_lang_String::offset(java_string); 402 int length = java_lang_String::length(java_string); 403 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset); 404 return UNICODE::as_utf8(position, length); 405 } 406 407 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) { 408 typeArrayOop value = java_lang_String::value(java_string); 409 int offset = java_lang_String::offset(java_string); 410 int length = java_lang_String::length(java_string); 411 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset); 412 return UNICODE::as_utf8(position, length, buf, buflen); 413 } 414 415 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) { 416 typeArrayOop value = java_lang_String::value(java_string); 417 int offset = java_lang_String::offset(java_string); 418 int length = java_lang_String::length(java_string); 419 assert(start + len <= length, "just checking"); 420 jchar* position = value->char_at_addr(offset + start); 421 return UNICODE::as_utf8(position, len); 422 } 423 424 bool java_lang_String::equals(oop java_string, jchar* chars, int len) { 425 assert(java_string->klass() == SystemDictionary::String_klass(), 426 "must be java_string"); 427 typeArrayOop value = java_lang_String::value(java_string); 428 int offset = java_lang_String::offset(java_string); 429 int length = java_lang_String::length(java_string); 430 if (length != len) { 431 return false; 432 } 433 for (int i = 0; i < len; i++) { 434 if (value->char_at(i + offset) != chars[i]) { 435 return false; 436 } 437 } 438 return true; 439 } 440 441 void java_lang_String::print(Handle java_string, outputStream* st) { 442 oop obj = java_string(); 443 assert(obj->klass() == SystemDictionary::String_klass(), "must be java_string"); 444 typeArrayOop value = java_lang_String::value(obj); 445 int offset = java_lang_String::offset(obj); 446 int length = java_lang_String::length(obj); 447 448 int end = MIN2(length, 100); 449 if (value == NULL) { 450 // This can happen if, e.g., printing a String 451 // object before its initializer has been called 452 st->print_cr("NULL"); 453 } else { 454 st->print("\""); 455 for (int index = 0; index < length; index++) { 456 st->print("%c", value->char_at(index + offset)); 457 } 458 st->print("\""); 459 } 460 } 461 462 static void initialize_static_field(fieldDescriptor* fd, TRAPS) { 463 Handle mirror (THREAD, fd->field_holder()->java_mirror()); 464 assert(mirror.not_null() && fd->is_static(), "just checking"); 465 if (fd->has_initial_value()) { 466 BasicType t = fd->field_type(); 467 switch (t) { 468 case T_BYTE: 469 mirror()->byte_field_put(fd->offset(), fd->int_initial_value()); 470 break; 471 case T_BOOLEAN: 472 mirror()->bool_field_put(fd->offset(), fd->int_initial_value()); 473 break; 474 case T_CHAR: 475 mirror()->char_field_put(fd->offset(), fd->int_initial_value()); 476 break; 477 case T_SHORT: 478 mirror()->short_field_put(fd->offset(), fd->int_initial_value()); 479 break; 480 case T_INT: 481 mirror()->int_field_put(fd->offset(), fd->int_initial_value()); 482 break; 483 case T_FLOAT: 484 mirror()->float_field_put(fd->offset(), fd->float_initial_value()); 485 break; 486 case T_DOUBLE: 487 mirror()->double_field_put(fd->offset(), fd->double_initial_value()); 488 break; 489 case T_LONG: 490 mirror()->long_field_put(fd->offset(), fd->long_initial_value()); 491 break; 492 case T_OBJECT: 493 { 494 #ifdef ASSERT 495 TempNewSymbol sym = SymbolTable::new_symbol("Ljava/lang/String;", CHECK); 496 assert(fd->signature() == sym, "just checking"); 497 #endif 498 oop string = fd->string_initial_value(CHECK); 499 mirror()->obj_field_put(fd->offset(), string); 500 } 501 break; 502 default: 503 THROW_MSG(vmSymbols::java_lang_ClassFormatError(), 504 "Illegal ConstantValue attribute in class file"); 505 } 506 } 507 } 508 509 510 void java_lang_Class::fixup_mirror(KlassHandle k, TRAPS) { 511 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already"); 512 513 // If the offset was read from the shared archive, it was fixed up already 514 if (!k->is_shared()) { 515 if (k->oop_is_instance()) { 516 // During bootstrap, java.lang.Class wasn't loaded so static field 517 // offsets were computed without the size added it. Go back and 518 // update all the static field offsets to included the size. 519 for (JavaFieldStream fs(InstanceKlass::cast(k())); !fs.done(); fs.next()) { 520 if (fs.access_flags().is_static()) { 521 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields(); 522 fs.set_offset(real_offset); 523 } 524 } 525 } 526 } 527 create_mirror(k, Handle(NULL), CHECK); 528 } 529 530 oop java_lang_Class::create_mirror(KlassHandle k, Handle protection_domain, TRAPS) { 531 assert(k->java_mirror() == NULL, "should only assign mirror once"); 532 // Use this moment of initialization to cache modifier_flags also, 533 // to support Class.getModifiers(). Instance classes recalculate 534 // the cached flags after the class file is parsed, but before the 535 // class is put into the system dictionary. 536 int computed_modifiers = k->compute_modifier_flags(CHECK_0); 537 k->set_modifier_flags(computed_modifiers); 538 // Class_klass has to be loaded because it is used to allocate 539 // the mirror. 540 if (SystemDictionary::Class_klass_loaded()) { 541 // Allocate mirror (java.lang.Class instance) 542 Handle mirror = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK_0); 543 544 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass()); 545 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror())); 546 547 // It might also have a component mirror. This mirror must already exist. 548 if (k->oop_is_array()) { 549 Handle comp_mirror; 550 if (k->oop_is_typeArray()) { 551 BasicType type = TypeArrayKlass::cast(k())->element_type(); 552 comp_mirror = Universe::java_mirror(type); 553 } else { 554 assert(k->oop_is_objArray(), "Must be"); 555 Klass* element_klass = ObjArrayKlass::cast(k())->element_klass(); 556 assert(element_klass != NULL, "Must have an element klass"); 557 comp_mirror = element_klass->java_mirror(); 558 } 559 assert(comp_mirror.not_null(), "must have a mirror"); 560 561 // Two-way link between the array klass and its component mirror: 562 ArrayKlass::cast(k())->set_component_mirror(comp_mirror()); 563 set_array_klass(comp_mirror(), k()); 564 } else { 565 assert(k->oop_is_instance(), "Must be"); 566 567 // Allocate a simple java object for a lock. 568 // This needs to be a java object because during class initialization 569 // it can be held across a java call. 570 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_NULL); 571 set_init_lock(mirror(), r); 572 573 // Set protection domain also 574 set_protection_domain(mirror(), protection_domain()); 575 576 // Initialize static fields 577 InstanceKlass::cast(k())->do_local_static_fields(&initialize_static_field, CHECK_NULL); 578 } 579 return mirror(); 580 } else { 581 if (fixup_mirror_list() == NULL) { 582 GrowableArray<Klass*>* list = 583 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true); 584 set_fixup_mirror_list(list); 585 } 586 fixup_mirror_list()->push(k()); 587 return NULL; 588 } 589 } 590 591 592 593 int java_lang_Class::oop_size(oop java_class) { 594 assert(_oop_size_offset != 0, "must be set"); 595 return java_class->int_field(_oop_size_offset); 596 } 597 void java_lang_Class::set_oop_size(oop java_class, int size) { 598 assert(_oop_size_offset != 0, "must be set"); 599 java_class->int_field_put(_oop_size_offset, size); 600 } 601 int java_lang_Class::static_oop_field_count(oop java_class) { 602 assert(_static_oop_field_count_offset != 0, "must be set"); 603 return java_class->int_field(_static_oop_field_count_offset); 604 } 605 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) { 606 assert(_static_oop_field_count_offset != 0, "must be set"); 607 java_class->int_field_put(_static_oop_field_count_offset, size); 608 } 609 610 oop java_lang_Class::protection_domain(oop java_class) { 611 assert(_protection_domain_offset != 0, "must be set"); 612 return java_class->obj_field(_protection_domain_offset); 613 } 614 void java_lang_Class::set_protection_domain(oop java_class, oop pd) { 615 assert(_protection_domain_offset != 0, "must be set"); 616 java_class->obj_field_put(_protection_domain_offset, pd); 617 } 618 619 oop java_lang_Class::init_lock(oop java_class) { 620 assert(_init_lock_offset != 0, "must be set"); 621 return java_class->obj_field(_init_lock_offset); 622 } 623 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) { 624 assert(_init_lock_offset != 0, "must be set"); 625 java_class->obj_field_put(_init_lock_offset, init_lock); 626 } 627 628 objArrayOop java_lang_Class::signers(oop java_class) { 629 assert(_signers_offset != 0, "must be set"); 630 return (objArrayOop)java_class->obj_field(_signers_offset); 631 } 632 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) { 633 assert(_signers_offset != 0, "must be set"); 634 java_class->obj_field_put(_signers_offset, (oop)signers); 635 } 636 637 638 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) { 639 // This should be improved by adding a field at the Java level or by 640 // introducing a new VM klass (see comment in ClassFileParser) 641 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0); 642 if (type != T_VOID) { 643 Klass* aklass = Universe::typeArrayKlassObj(type); 644 assert(aklass != NULL, "correct bootstrap"); 645 set_array_klass(java_class, aklass); 646 } 647 #ifdef ASSERT 648 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass()); 649 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation"); 650 #endif 651 return java_class; 652 } 653 654 655 Klass* java_lang_Class::as_Klass(oop java_class) { 656 //%note memory_2 657 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 658 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset)); 659 assert(k == NULL || k->is_klass(), "type check"); 660 return k; 661 } 662 663 664 void java_lang_Class::set_klass(oop java_class, Klass* klass) { 665 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 666 java_class->metadata_field_put(_klass_offset, klass); 667 } 668 669 670 void java_lang_Class::print_signature(oop java_class, outputStream* st) { 671 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 672 Symbol* name = NULL; 673 bool is_instance = false; 674 if (is_primitive(java_class)) { 675 name = vmSymbols::type_signature(primitive_type(java_class)); 676 } else { 677 Klass* k = as_Klass(java_class); 678 is_instance = k->oop_is_instance(); 679 name = k->name(); 680 } 681 if (name == NULL) { 682 st->print("<null>"); 683 return; 684 } 685 if (is_instance) st->print("L"); 686 st->write((char*) name->base(), (int) name->utf8_length()); 687 if (is_instance) st->print(";"); 688 } 689 690 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) { 691 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 692 Symbol* name; 693 if (is_primitive(java_class)) { 694 name = vmSymbols::type_signature(primitive_type(java_class)); 695 // Because this can create a new symbol, the caller has to decrement 696 // the refcount, so make adjustment here and below for symbols returned 697 // that are not created or incremented due to a successful lookup. 698 name->increment_refcount(); 699 } else { 700 Klass* k = as_Klass(java_class); 701 if (!k->oop_is_instance()) { 702 name = k->name(); 703 name->increment_refcount(); 704 } else { 705 ResourceMark rm; 706 const char* sigstr = k->signature_name(); 707 int siglen = (int) strlen(sigstr); 708 if (!intern_if_not_found) { 709 name = SymbolTable::probe(sigstr, siglen); 710 } else { 711 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 712 } 713 } 714 } 715 return name; 716 } 717 718 719 Klass* java_lang_Class::array_klass(oop java_class) { 720 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset)); 721 assert(k == NULL || k->is_klass() && k->oop_is_array(), "should be array klass"); 722 return k; 723 } 724 725 726 void java_lang_Class::set_array_klass(oop java_class, Klass* klass) { 727 assert(klass->is_klass() && klass->oop_is_array(), "should be array klass"); 728 java_class->metadata_field_put(_array_klass_offset, klass); 729 } 730 731 732 bool java_lang_Class::is_primitive(oop java_class) { 733 // should assert: 734 //assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 735 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL); 736 737 #ifdef ASSERT 738 if (is_primitive) { 739 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset)); 740 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()), 741 "Should be either the T_VOID primitive or a java primitive"); 742 } 743 #endif 744 745 return is_primitive; 746 } 747 748 749 BasicType java_lang_Class::primitive_type(oop java_class) { 750 assert(java_lang_Class::is_primitive(java_class), "just checking"); 751 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset)); 752 BasicType type = T_VOID; 753 if (ak != NULL) { 754 // Note: create_basic_type_mirror above initializes ak to a non-null value. 755 type = ArrayKlass::cast(ak)->element_type(); 756 } else { 757 assert(java_class == Universe::void_mirror(), "only valid non-array primitive"); 758 } 759 assert(Universe::java_mirror(type) == java_class, "must be consistent"); 760 return type; 761 } 762 763 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) { 764 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 765 if (is_primitive(java_class)) { 766 if (reference_klass != NULL) 767 (*reference_klass) = NULL; 768 return primitive_type(java_class); 769 } else { 770 if (reference_klass != NULL) 771 (*reference_klass) = as_Klass(java_class); 772 return T_OBJECT; 773 } 774 } 775 776 777 oop java_lang_Class::primitive_mirror(BasicType t) { 778 oop mirror = Universe::java_mirror(t); 779 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class"); 780 assert(java_lang_Class::is_primitive(mirror), "must be primitive"); 781 return mirror; 782 } 783 784 bool java_lang_Class::offsets_computed = false; 785 int java_lang_Class::classRedefinedCount_offset = -1; 786 787 void java_lang_Class::compute_offsets() { 788 assert(!offsets_computed, "offsets should be initialized only once"); 789 offsets_computed = true; 790 791 Klass* klass_oop = SystemDictionary::Class_klass(); 792 // The classRedefinedCount field is only present starting in 1.5, 793 // so don't go fatal. 794 compute_optional_offset(classRedefinedCount_offset, 795 klass_oop, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature()); 796 797 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 798 } 799 800 int java_lang_Class::classRedefinedCount(oop the_class_mirror) { 801 if (!JDK_Version::is_gte_jdk15x_version() 802 || classRedefinedCount_offset == -1) { 803 // The classRedefinedCount field is only present starting in 1.5. 804 // If we don't have an offset for it then just return -1 as a marker. 805 return -1; 806 } 807 808 return the_class_mirror->int_field(classRedefinedCount_offset); 809 } 810 811 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) { 812 if (!JDK_Version::is_gte_jdk15x_version() 813 || classRedefinedCount_offset == -1) { 814 // The classRedefinedCount field is only present starting in 1.5. 815 // If we don't have an offset for it then nothing to set. 816 return; 817 } 818 819 the_class_mirror->int_field_put(classRedefinedCount_offset, value); 820 } 821 822 823 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the 824 // platform thread structure, and a eetop offset which was used for thread 825 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures 826 // merged, so in the HotSpot VM we just use the eetop field for the thread 827 // instead of the privateInfo_offset. 828 // 829 // Note: The stackSize field is only present starting in 1.4. 830 831 int java_lang_Thread::_name_offset = 0; 832 int java_lang_Thread::_group_offset = 0; 833 int java_lang_Thread::_contextClassLoader_offset = 0; 834 int java_lang_Thread::_inheritedAccessControlContext_offset = 0; 835 int java_lang_Thread::_priority_offset = 0; 836 int java_lang_Thread::_eetop_offset = 0; 837 int java_lang_Thread::_daemon_offset = 0; 838 int java_lang_Thread::_stillborn_offset = 0; 839 int java_lang_Thread::_stackSize_offset = 0; 840 int java_lang_Thread::_tid_offset = 0; 841 int java_lang_Thread::_thread_status_offset = 0; 842 int java_lang_Thread::_park_blocker_offset = 0; 843 int java_lang_Thread::_park_event_offset = 0 ; 844 845 846 void java_lang_Thread::compute_offsets() { 847 assert(_group_offset == 0, "offsets should be initialized only once"); 848 849 Klass* k = SystemDictionary::Thread_klass(); 850 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::char_array_signature()); 851 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature()); 852 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature()); 853 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature()); 854 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature()); 855 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature()); 856 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature()); 857 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature()); 858 // The stackSize field is only present starting in 1.4, so don't go fatal. 859 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature()); 860 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal. 861 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature()); 862 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature()); 863 // The parkBlocker field is only present starting in 1.6, so don't go fatal. 864 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature()); 865 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(), 866 vmSymbols::long_signature()); 867 } 868 869 870 JavaThread* java_lang_Thread::thread(oop java_thread) { 871 return (JavaThread*)java_thread->address_field(_eetop_offset); 872 } 873 874 875 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) { 876 java_thread->address_field_put(_eetop_offset, (address)thread); 877 } 878 879 880 typeArrayOop java_lang_Thread::name(oop java_thread) { 881 oop name = java_thread->obj_field(_name_offset); 882 assert(name == NULL || (name->is_typeArray() && TypeArrayKlass::cast(name->klass())->element_type() == T_CHAR), "just checking"); 883 return typeArrayOop(name); 884 } 885 886 887 void java_lang_Thread::set_name(oop java_thread, typeArrayOop name) { 888 assert(java_thread->obj_field(_name_offset) == NULL, "name should be NULL"); 889 java_thread->obj_field_put(_name_offset, name); 890 } 891 892 893 ThreadPriority java_lang_Thread::priority(oop java_thread) { 894 return (ThreadPriority)java_thread->int_field(_priority_offset); 895 } 896 897 898 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) { 899 java_thread->int_field_put(_priority_offset, priority); 900 } 901 902 903 oop java_lang_Thread::threadGroup(oop java_thread) { 904 return java_thread->obj_field(_group_offset); 905 } 906 907 908 bool java_lang_Thread::is_stillborn(oop java_thread) { 909 return java_thread->bool_field(_stillborn_offset) != 0; 910 } 911 912 913 // We never have reason to turn the stillborn bit off 914 void java_lang_Thread::set_stillborn(oop java_thread) { 915 java_thread->bool_field_put(_stillborn_offset, true); 916 } 917 918 919 bool java_lang_Thread::is_alive(oop java_thread) { 920 JavaThread* thr = java_lang_Thread::thread(java_thread); 921 return (thr != NULL); 922 } 923 924 925 bool java_lang_Thread::is_daemon(oop java_thread) { 926 return java_thread->bool_field(_daemon_offset) != 0; 927 } 928 929 930 void java_lang_Thread::set_daemon(oop java_thread) { 931 java_thread->bool_field_put(_daemon_offset, true); 932 } 933 934 oop java_lang_Thread::context_class_loader(oop java_thread) { 935 return java_thread->obj_field(_contextClassLoader_offset); 936 } 937 938 oop java_lang_Thread::inherited_access_control_context(oop java_thread) { 939 return java_thread->obj_field(_inheritedAccessControlContext_offset); 940 } 941 942 943 jlong java_lang_Thread::stackSize(oop java_thread) { 944 // The stackSize field is only present starting in 1.4 945 if (_stackSize_offset > 0) { 946 assert(JDK_Version::is_gte_jdk14x_version(), "sanity check"); 947 return java_thread->long_field(_stackSize_offset); 948 } else { 949 return 0; 950 } 951 } 952 953 // Write the thread status value to threadStatus field in java.lang.Thread java class. 954 void java_lang_Thread::set_thread_status(oop java_thread, 955 java_lang_Thread::ThreadStatus status) { 956 // The threadStatus is only present starting in 1.5 957 if (_thread_status_offset > 0) { 958 java_thread->int_field_put(_thread_status_offset, status); 959 } 960 } 961 962 // Read thread status value from threadStatus field in java.lang.Thread java class. 963 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) { 964 assert(Thread::current()->is_Watcher_thread() || Thread::current()->is_VM_thread() || 965 JavaThread::current()->thread_state() == _thread_in_vm, 966 "Java Thread is not running in vm"); 967 // The threadStatus is only present starting in 1.5 968 if (_thread_status_offset > 0) { 969 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 970 } else { 971 // All we can easily figure out is if it is alive, but that is 972 // enough info for a valid unknown status. 973 // These aren't restricted to valid set ThreadStatus values, so 974 // use JVMTI values and cast. 975 JavaThread* thr = java_lang_Thread::thread(java_thread); 976 if (thr == NULL) { 977 // the thread hasn't run yet or is in the process of exiting 978 return NEW; 979 } 980 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE; 981 } 982 } 983 984 985 jlong java_lang_Thread::thread_id(oop java_thread) { 986 // The thread ID field is only present starting in 1.5 987 if (_tid_offset > 0) { 988 return java_thread->long_field(_tid_offset); 989 } else { 990 return 0; 991 } 992 } 993 994 oop java_lang_Thread::park_blocker(oop java_thread) { 995 assert(JDK_Version::current().supports_thread_park_blocker() && 996 _park_blocker_offset != 0, "Must support parkBlocker field"); 997 998 if (_park_blocker_offset > 0) { 999 return java_thread->obj_field(_park_blocker_offset); 1000 } 1001 1002 return NULL; 1003 } 1004 1005 jlong java_lang_Thread::park_event(oop java_thread) { 1006 if (_park_event_offset > 0) { 1007 return java_thread->long_field(_park_event_offset); 1008 } 1009 return 0; 1010 } 1011 1012 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) { 1013 if (_park_event_offset > 0) { 1014 java_thread->long_field_put(_park_event_offset, ptr); 1015 return true; 1016 } 1017 return false; 1018 } 1019 1020 1021 const char* java_lang_Thread::thread_status_name(oop java_thread) { 1022 assert(JDK_Version::is_gte_jdk15x_version() && _thread_status_offset != 0, "Must have thread status"); 1023 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1024 switch (status) { 1025 case NEW : return "NEW"; 1026 case RUNNABLE : return "RUNNABLE"; 1027 case SLEEPING : return "TIMED_WAITING (sleeping)"; 1028 case IN_OBJECT_WAIT : return "WAITING (on object monitor)"; 1029 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)"; 1030 case PARKED : return "WAITING (parking)"; 1031 case PARKED_TIMED : return "TIMED_WAITING (parking)"; 1032 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)"; 1033 case TERMINATED : return "TERMINATED"; 1034 default : return "UNKNOWN"; 1035 }; 1036 } 1037 int java_lang_ThreadGroup::_parent_offset = 0; 1038 int java_lang_ThreadGroup::_name_offset = 0; 1039 int java_lang_ThreadGroup::_threads_offset = 0; 1040 int java_lang_ThreadGroup::_groups_offset = 0; 1041 int java_lang_ThreadGroup::_maxPriority_offset = 0; 1042 int java_lang_ThreadGroup::_destroyed_offset = 0; 1043 int java_lang_ThreadGroup::_daemon_offset = 0; 1044 int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0; 1045 int java_lang_ThreadGroup::_nthreads_offset = 0; 1046 int java_lang_ThreadGroup::_ngroups_offset = 0; 1047 1048 oop java_lang_ThreadGroup::parent(oop java_thread_group) { 1049 assert(java_thread_group->is_oop(), "thread group must be oop"); 1050 return java_thread_group->obj_field(_parent_offset); 1051 } 1052 1053 // ("name as oop" accessor is not necessary) 1054 1055 typeArrayOop java_lang_ThreadGroup::name(oop java_thread_group) { 1056 oop name = java_thread_group->obj_field(_name_offset); 1057 // ThreadGroup.name can be null 1058 return name == NULL ? (typeArrayOop)NULL : java_lang_String::value(name); 1059 } 1060 1061 int java_lang_ThreadGroup::nthreads(oop java_thread_group) { 1062 assert(java_thread_group->is_oop(), "thread group must be oop"); 1063 return java_thread_group->int_field(_nthreads_offset); 1064 } 1065 1066 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) { 1067 oop threads = java_thread_group->obj_field(_threads_offset); 1068 assert(threads != NULL, "threadgroups should have threads"); 1069 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code 1070 return objArrayOop(threads); 1071 } 1072 1073 int java_lang_ThreadGroup::ngroups(oop java_thread_group) { 1074 assert(java_thread_group->is_oop(), "thread group must be oop"); 1075 return java_thread_group->int_field(_ngroups_offset); 1076 } 1077 1078 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) { 1079 oop groups = java_thread_group->obj_field(_groups_offset); 1080 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code 1081 return objArrayOop(groups); 1082 } 1083 1084 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) { 1085 assert(java_thread_group->is_oop(), "thread group must be oop"); 1086 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset); 1087 } 1088 1089 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) { 1090 assert(java_thread_group->is_oop(), "thread group must be oop"); 1091 return java_thread_group->bool_field(_destroyed_offset) != 0; 1092 } 1093 1094 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) { 1095 assert(java_thread_group->is_oop(), "thread group must be oop"); 1096 return java_thread_group->bool_field(_daemon_offset) != 0; 1097 } 1098 1099 bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) { 1100 assert(java_thread_group->is_oop(), "thread group must be oop"); 1101 return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0; 1102 } 1103 1104 void java_lang_ThreadGroup::compute_offsets() { 1105 assert(_parent_offset == 0, "offsets should be initialized only once"); 1106 1107 Klass* k = SystemDictionary::ThreadGroup_klass(); 1108 1109 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature()); 1110 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1111 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature()); 1112 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature()); 1113 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature()); 1114 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature()); 1115 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature()); 1116 compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature()); 1117 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature()); 1118 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature()); 1119 } 1120 1121 oop java_lang_Throwable::unassigned_stacktrace() { 1122 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Throwable_klass()); 1123 address addr = ik->static_field_addr(static_unassigned_stacktrace_offset); 1124 if (UseCompressedOops) { 1125 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 1126 } else { 1127 return oopDesc::load_decode_heap_oop((oop*)addr); 1128 } 1129 } 1130 1131 oop java_lang_Throwable::backtrace(oop throwable) { 1132 return throwable->obj_field_acquire(backtrace_offset); 1133 } 1134 1135 1136 void java_lang_Throwable::set_backtrace(oop throwable, oop value) { 1137 throwable->release_obj_field_put(backtrace_offset, value); 1138 } 1139 1140 1141 oop java_lang_Throwable::message(oop throwable) { 1142 return throwable->obj_field(detailMessage_offset); 1143 } 1144 1145 1146 oop java_lang_Throwable::message(Handle throwable) { 1147 return throwable->obj_field(detailMessage_offset); 1148 } 1149 1150 1151 void java_lang_Throwable::set_message(oop throwable, oop value) { 1152 throwable->obj_field_put(detailMessage_offset, value); 1153 } 1154 1155 1156 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) { 1157 throwable->obj_field_put(stackTrace_offset, st_element_array); 1158 } 1159 1160 void java_lang_Throwable::clear_stacktrace(oop throwable) { 1161 assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4"); 1162 set_stacktrace(throwable, NULL); 1163 } 1164 1165 1166 void java_lang_Throwable::print(oop throwable, outputStream* st) { 1167 ResourceMark rm; 1168 Klass* k = throwable->klass(); 1169 assert(k != NULL, "just checking"); 1170 st->print("%s", InstanceKlass::cast(k)->external_name()); 1171 oop msg = message(throwable); 1172 if (msg != NULL) { 1173 st->print(": %s", java_lang_String::as_utf8_string(msg)); 1174 } 1175 } 1176 1177 1178 void java_lang_Throwable::print(Handle throwable, outputStream* st) { 1179 ResourceMark rm; 1180 Klass* k = throwable->klass(); 1181 assert(k != NULL, "just checking"); 1182 st->print("%s", InstanceKlass::cast(k)->external_name()); 1183 oop msg = message(throwable); 1184 if (msg != NULL) { 1185 st->print(": %s", java_lang_String::as_utf8_string(msg)); 1186 } 1187 } 1188 1189 // After this many redefines, the stack trace is unreliable. 1190 const int MAX_VERSION = USHRT_MAX; 1191 1192 // Helper backtrace functions to store bci|version together. 1193 static inline int merge_bci_and_version(int bci, int version) { 1194 // only store u2 for version, checking for overflow. 1195 if (version > USHRT_MAX || version < 0) version = MAX_VERSION; 1196 assert((jushort)bci == bci, "bci should be short"); 1197 return build_int_from_shorts(version, bci); 1198 } 1199 1200 static inline int bci_at(unsigned int merged) { 1201 return extract_high_short_from_int(merged); 1202 } 1203 static inline int version_at(unsigned int merged) { 1204 return extract_low_short_from_int(merged); 1205 } 1206 1207 static inline bool version_matches(Method* method, int version) { 1208 return (method->constants()->version() == version && version < MAX_VERSION); 1209 } 1210 1211 static inline int get_line_number(Method* method, int bci) { 1212 int line_number = 0; 1213 if (method->is_native()) { 1214 // Negative value different from -1 below, enabling Java code in 1215 // class java.lang.StackTraceElement to distinguish "native" from 1216 // "no LineNumberTable". JDK tests for -2. 1217 line_number = -2; 1218 } else { 1219 // Returns -1 if no LineNumberTable, and otherwise actual line number 1220 line_number = method->line_number_from_bci(bci); 1221 if (line_number == -1 && ShowHiddenFrames) { 1222 line_number = bci + 1000000; 1223 } 1224 } 1225 return line_number; 1226 } 1227 1228 // This class provides a simple wrapper over the internal structure of 1229 // exception backtrace to insulate users of the backtrace from needing 1230 // to know what it looks like. 1231 class BacktraceBuilder: public StackObj { 1232 private: 1233 Handle _backtrace; 1234 objArrayOop _head; 1235 typeArrayOop _methods; 1236 typeArrayOop _bcis; 1237 objArrayOop _mirrors; 1238 int _index; 1239 No_Safepoint_Verifier _nsv; 1240 1241 public: 1242 1243 enum { 1244 trace_methods_offset = java_lang_Throwable::trace_methods_offset, 1245 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset, 1246 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset, 1247 trace_next_offset = java_lang_Throwable::trace_next_offset, 1248 trace_size = java_lang_Throwable::trace_size, 1249 trace_chunk_size = java_lang_Throwable::trace_chunk_size 1250 }; 1251 1252 // get info out of chunks 1253 static typeArrayOop get_methods(objArrayHandle chunk) { 1254 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset)); 1255 assert(methods != NULL, "method array should be initialized in backtrace"); 1256 return methods; 1257 } 1258 static typeArrayOop get_bcis(objArrayHandle chunk) { 1259 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 1260 assert(bcis != NULL, "bci array should be initialized in backtrace"); 1261 return bcis; 1262 } 1263 static objArrayOop get_mirrors(objArrayHandle chunk) { 1264 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset)); 1265 assert(mirrors != NULL, "mirror array should be initialized in backtrace"); 1266 return mirrors; 1267 } 1268 1269 // constructor for new backtrace 1270 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL) { 1271 expand(CHECK); 1272 _backtrace = _head; 1273 _index = 0; 1274 } 1275 1276 BacktraceBuilder(objArrayHandle backtrace) { 1277 _methods = get_methods(backtrace); 1278 _bcis = get_bcis(backtrace); 1279 _mirrors = get_mirrors(backtrace); 1280 assert(_methods->length() == _bcis->length() && 1281 _methods->length() == _mirrors->length(), 1282 "method and source information arrays should match"); 1283 1284 // head is the preallocated backtrace 1285 _backtrace = _head = backtrace(); 1286 _index = 0; 1287 } 1288 1289 void expand(TRAPS) { 1290 objArrayHandle old_head(THREAD, _head); 1291 Pause_No_Safepoint_Verifier pnsv(&_nsv); 1292 1293 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK); 1294 objArrayHandle new_head(THREAD, head); 1295 1296 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK); 1297 typeArrayHandle new_methods(THREAD, methods); 1298 1299 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK); 1300 typeArrayHandle new_bcis(THREAD, bcis); 1301 1302 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK); 1303 objArrayHandle new_mirrors(THREAD, mirrors); 1304 1305 if (!old_head.is_null()) { 1306 old_head->obj_at_put(trace_next_offset, new_head()); 1307 } 1308 new_head->obj_at_put(trace_methods_offset, new_methods()); 1309 new_head->obj_at_put(trace_bcis_offset, new_bcis()); 1310 new_head->obj_at_put(trace_mirrors_offset, new_mirrors()); 1311 1312 _head = new_head(); 1313 _methods = new_methods(); 1314 _bcis = new_bcis(); 1315 _mirrors = new_mirrors(); 1316 _index = 0; 1317 } 1318 1319 oop backtrace() { 1320 return _backtrace(); 1321 } 1322 1323 inline void push(Method* method, int bci, TRAPS) { 1324 // Smear the -1 bci to 0 since the array only holds unsigned 1325 // shorts. The later line number lookup would just smear the -1 1326 // to a 0 even if it could be recorded. 1327 if (bci == SynchronizationEntryBCI) bci = 0; 1328 1329 if (_index >= trace_chunk_size) { 1330 methodHandle mhandle(THREAD, method); 1331 expand(CHECK); 1332 method = mhandle(); 1333 } 1334 1335 _methods->short_at_put(_index, method->method_idnum()); 1336 _bcis->int_at_put(_index, merge_bci_and_version(bci, method->constants()->version())); 1337 1338 // We need to save the mirrors in the backtrace to keep the class 1339 // from being unloaded while we still have this stack trace. 1340 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror"); 1341 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror()); 1342 _index++; 1343 } 1344 1345 }; 1346 1347 // Print stack trace element to resource allocated buffer 1348 char* java_lang_Throwable::print_stack_element_to_buffer(Handle mirror, 1349 int method_id, int version, int bci) { 1350 1351 // Get strings and string lengths 1352 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 1353 const char* klass_name = holder->external_name(); 1354 int buf_len = (int)strlen(klass_name); 1355 1356 // pushing to the stack trace added one. 1357 Method* method = holder->method_with_idnum(method_id); 1358 char* method_name = method->name()->as_C_string(); 1359 buf_len += (int)strlen(method_name); 1360 1361 char* source_file_name = NULL; 1362 if (version_matches(method, version)) { 1363 Symbol* source = holder->source_file_name(); 1364 if (source != NULL) { 1365 source_file_name = source->as_C_string(); 1366 buf_len += (int)strlen(source_file_name); 1367 } 1368 } 1369 1370 // Allocate temporary buffer with extra space for formatting and line number 1371 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64); 1372 1373 // Print stack trace line in buffer 1374 sprintf(buf, "\tat %s.%s", klass_name, method_name); 1375 1376 if (!version_matches(method, version)) { 1377 strcat(buf, "(Redefined)"); 1378 } else { 1379 int line_number = get_line_number(method, bci); 1380 if (line_number == -2) { 1381 strcat(buf, "(Native Method)"); 1382 } else { 1383 if (source_file_name != NULL && (line_number != -1)) { 1384 // Sourcename and linenumber 1385 sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number); 1386 } else if (source_file_name != NULL) { 1387 // Just sourcename 1388 sprintf(buf + (int)strlen(buf), "(%s)", source_file_name); 1389 } else { 1390 // Neither sourcename nor linenumber 1391 sprintf(buf + (int)strlen(buf), "(Unknown Source)"); 1392 } 1393 nmethod* nm = method->code(); 1394 if (WizardMode && nm != NULL) { 1395 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm); 1396 } 1397 } 1398 } 1399 1400 return buf; 1401 } 1402 1403 void java_lang_Throwable::print_stack_element(outputStream *st, Handle mirror, 1404 int method_id, int version, int bci) { 1405 ResourceMark rm; 1406 char* buf = print_stack_element_to_buffer(mirror, method_id, version, bci); 1407 st->print_cr("%s", buf); 1408 } 1409 1410 void java_lang_Throwable::print_stack_element(outputStream *st, methodHandle method, int bci) { 1411 Handle mirror = method->method_holder()->java_mirror(); 1412 int method_id = method->method_idnum(); 1413 int version = method->constants()->version(); 1414 print_stack_element(st, mirror, method_id, version, bci); 1415 } 1416 1417 const char* java_lang_Throwable::no_stack_trace_message() { 1418 return "\t<<no stack trace available>>"; 1419 } 1420 1421 1422 // Currently used only for exceptions occurring during startup 1423 void java_lang_Throwable::print_stack_trace(oop throwable, outputStream* st) { 1424 Thread *THREAD = Thread::current(); 1425 Handle h_throwable(THREAD, throwable); 1426 while (h_throwable.not_null()) { 1427 objArrayHandle result (THREAD, objArrayOop(backtrace(h_throwable()))); 1428 if (result.is_null()) { 1429 st->print_cr(no_stack_trace_message()); 1430 return; 1431 } 1432 1433 while (result.not_null()) { 1434 1435 // Get method id, bci, version and mirror from chunk 1436 typeArrayHandle methods (THREAD, BacktraceBuilder::get_methods(result)); 1437 typeArrayHandle bcis (THREAD, BacktraceBuilder::get_bcis(result)); 1438 objArrayHandle mirrors (THREAD, BacktraceBuilder::get_mirrors(result)); 1439 1440 int length = methods()->length(); 1441 for (int index = 0; index < length; index++) { 1442 Handle mirror(THREAD, mirrors->obj_at(index)); 1443 // NULL mirror means end of stack trace 1444 if (mirror.is_null()) goto handle_cause; 1445 int method = methods->short_at(index); 1446 int version = version_at(bcis->int_at(index)); 1447 int bci = bci_at(bcis->int_at(index)); 1448 print_stack_element(st, mirror, method, version, bci); 1449 } 1450 result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset))); 1451 } 1452 handle_cause: 1453 { 1454 EXCEPTION_MARK; 1455 JavaValue cause(T_OBJECT); 1456 JavaCalls::call_virtual(&cause, 1457 h_throwable, 1458 KlassHandle(THREAD, h_throwable->klass()), 1459 vmSymbols::getCause_name(), 1460 vmSymbols::void_throwable_signature(), 1461 THREAD); 1462 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 1463 if (HAS_PENDING_EXCEPTION) { 1464 CLEAR_PENDING_EXCEPTION; 1465 h_throwable = Handle(); 1466 } else { 1467 h_throwable = Handle(THREAD, (oop) cause.get_jobject()); 1468 if (h_throwable.not_null()) { 1469 st->print("Caused by: "); 1470 print(h_throwable, st); 1471 st->cr(); 1472 } 1473 } 1474 } 1475 } 1476 } 1477 1478 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS) { 1479 if (!StackTraceInThrowable) return; 1480 ResourceMark rm(THREAD); 1481 1482 // Start out by clearing the backtrace for this object, in case the VM 1483 // runs out of memory while allocating the stack trace 1484 set_backtrace(throwable(), NULL); 1485 if (JDK_Version::is_gte_jdk14x_version()) { 1486 // New since 1.4, clear lazily constructed Java level stacktrace if 1487 // refilling occurs 1488 // This is unnecessary in 1.7+ but harmless 1489 clear_stacktrace(throwable()); 1490 } 1491 1492 int max_depth = MaxJavaStackTraceDepth; 1493 JavaThread* thread = (JavaThread*)THREAD; 1494 BacktraceBuilder bt(CHECK); 1495 1496 // If there is no Java frame just return the method that was being called 1497 // with bci 0 1498 if (!thread->has_last_Java_frame()) { 1499 if (max_depth >= 1 && method() != NULL) { 1500 bt.push(method(), 0, CHECK); 1501 set_backtrace(throwable(), bt.backtrace()); 1502 } 1503 return; 1504 } 1505 1506 // Instead of using vframe directly, this version of fill_in_stack_trace 1507 // basically handles everything by hand. This significantly improved the 1508 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows. 1509 // See bug 6333838 for more details. 1510 // The "ASSERT" here is to verify this method generates the exactly same stack 1511 // trace as utilizing vframe. 1512 #ifdef ASSERT 1513 vframeStream st(thread); 1514 methodHandle st_method(THREAD, st.method()); 1515 #endif 1516 int total_count = 0; 1517 RegisterMap map(thread, false); 1518 int decode_offset = 0; 1519 nmethod* nm = NULL; 1520 bool skip_fillInStackTrace_check = false; 1521 bool skip_throwableInit_check = false; 1522 bool skip_hidden = !ShowHiddenFrames; 1523 1524 for (frame fr = thread->last_frame(); max_depth != total_count;) { 1525 Method* method = NULL; 1526 int bci = 0; 1527 1528 // Compiled java method case. 1529 if (decode_offset != 0) { 1530 DebugInfoReadStream stream(nm, decode_offset); 1531 decode_offset = stream.read_int(); 1532 method = (Method*)nm->metadata_at(stream.read_int()); 1533 bci = stream.read_bci(); 1534 } else { 1535 if (fr.is_first_frame()) break; 1536 address pc = fr.pc(); 1537 if (fr.is_interpreted_frame()) { 1538 intptr_t bcx = fr.interpreter_frame_bcx(); 1539 method = fr.interpreter_frame_method(); 1540 bci = fr.is_bci(bcx) ? bcx : method->bci_from((address)bcx); 1541 fr = fr.sender(&map); 1542 } else { 1543 CodeBlob* cb = fr.cb(); 1544 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL 1545 // but non nmethod 1546 fr = fr.sender(&map); 1547 if (cb == NULL || !cb->is_nmethod()) { 1548 continue; 1549 } 1550 nm = (nmethod*)cb; 1551 if (nm->method()->is_native()) { 1552 method = nm->method(); 1553 bci = 0; 1554 } else { 1555 PcDesc* pd = nm->pc_desc_at(pc); 1556 decode_offset = pd->scope_decode_offset(); 1557 // if decode_offset is not equal to 0, it will execute the 1558 // "compiled java method case" at the beginning of the loop. 1559 continue; 1560 } 1561 } 1562 } 1563 #ifdef ASSERT 1564 assert(st_method() == method && st.bci() == bci, 1565 "Wrong stack trace"); 1566 st.next(); 1567 // vframeStream::method isn't GC-safe so store off a copy 1568 // of the Method* in case we GC. 1569 if (!st.at_end()) { 1570 st_method = st.method(); 1571 } 1572 #endif 1573 1574 // the format of the stacktrace will be: 1575 // - 1 or more fillInStackTrace frames for the exception class (skipped) 1576 // - 0 or more <init> methods for the exception class (skipped) 1577 // - rest of the stack 1578 1579 if (!skip_fillInStackTrace_check) { 1580 if ((method->name() == vmSymbols::fillInStackTrace_name() || 1581 method->name() == vmSymbols::fillInStackTrace0_name()) && 1582 throwable->is_a(method->method_holder())) { 1583 continue; 1584 } 1585 else { 1586 skip_fillInStackTrace_check = true; // gone past them all 1587 } 1588 } 1589 if (!skip_throwableInit_check) { 1590 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering"); 1591 1592 // skip <init> methods of the exception class and superclasses 1593 // This is simlar to classic VM. 1594 if (method->name() == vmSymbols::object_initializer_name() && 1595 throwable->is_a(method->method_holder())) { 1596 continue; 1597 } else { 1598 // there are none or we've seen them all - either way stop checking 1599 skip_throwableInit_check = true; 1600 } 1601 } 1602 if (method->is_hidden()) { 1603 if (skip_hidden) continue; 1604 } 1605 bt.push(method, bci, CHECK); 1606 total_count++; 1607 } 1608 1609 // Put completed stack trace into throwable object 1610 set_backtrace(throwable(), bt.backtrace()); 1611 } 1612 1613 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method) { 1614 // No-op if stack trace is disabled 1615 if (!StackTraceInThrowable) { 1616 return; 1617 } 1618 1619 // Disable stack traces for some preallocated out of memory errors 1620 if (!Universe::should_fill_in_stack_trace(throwable)) { 1621 return; 1622 } 1623 1624 PRESERVE_EXCEPTION_MARK; 1625 1626 JavaThread* thread = JavaThread::active(); 1627 fill_in_stack_trace(throwable, method, thread); 1628 // ignore exceptions thrown during stack trace filling 1629 CLEAR_PENDING_EXCEPTION; 1630 } 1631 1632 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 1633 // Allocate stack trace - backtrace is created but not filled in 1634 1635 // No-op if stack trace is disabled 1636 if (!StackTraceInThrowable) return; 1637 BacktraceBuilder bt(CHECK); // creates a backtrace 1638 set_backtrace(throwable(), bt.backtrace()); 1639 } 1640 1641 1642 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 1643 // Fill in stack trace into preallocated backtrace (no GC) 1644 1645 // No-op if stack trace is disabled 1646 if (!StackTraceInThrowable) return; 1647 1648 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check"); 1649 1650 JavaThread* THREAD = JavaThread::current(); 1651 1652 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable())); 1653 assert(backtrace.not_null(), "backtrace should have been preallocated"); 1654 1655 ResourceMark rm(THREAD); 1656 vframeStream st(THREAD); 1657 1658 BacktraceBuilder bt(backtrace); 1659 1660 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 1661 // methods as preallocated errors aren't created by "java" code. 1662 1663 // fill in as much stack trace as possible 1664 typeArrayOop methods = BacktraceBuilder::get_methods(backtrace); 1665 int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth); 1666 int chunk_count = 0; 1667 1668 for (;!st.at_end(); st.next()) { 1669 bt.push(st.method(), st.bci(), CHECK); 1670 chunk_count++; 1671 1672 // Bail-out for deep stacks 1673 if (chunk_count >= max_chunks) break; 1674 } 1675 1676 // For Java 7+ we support the Throwable immutability protocol defined for Java 7. This support 1677 // was missing in 7u0 so in 7u0 there is a workaround in the Throwable class. That workaround 1678 // can be removed in a JDK using this JVM version 1679 if (JDK_Version::is_gte_jdk17x_version()) { 1680 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace()); 1681 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized"); 1682 } 1683 } 1684 1685 1686 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) { 1687 if (throwable == NULL) { 1688 THROW_0(vmSymbols::java_lang_NullPointerException()); 1689 } 1690 objArrayOop chunk = objArrayOop(backtrace(throwable)); 1691 int depth = 0; 1692 if (chunk != NULL) { 1693 // Iterate over chunks and count full ones 1694 while (true) { 1695 objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset)); 1696 if (next == NULL) break; 1697 depth += trace_chunk_size; 1698 chunk = next; 1699 } 1700 assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check"); 1701 // Count element in remaining partial chunk. NULL value for mirror 1702 // marks the end of the stack trace elements that are saved. 1703 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk); 1704 assert(mirrors != NULL, "sanity check"); 1705 for (int i = 0; i < mirrors->length(); i++) { 1706 if (mirrors->obj_at(i) == NULL) break; 1707 depth++; 1708 } 1709 } 1710 return depth; 1711 } 1712 1713 1714 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) { 1715 if (throwable == NULL) { 1716 THROW_0(vmSymbols::java_lang_NullPointerException()); 1717 } 1718 if (index < 0) { 1719 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 1720 } 1721 // Compute how many chunks to skip and index into actual chunk 1722 objArrayOop chunk = objArrayOop(backtrace(throwable)); 1723 int skip_chunks = index / trace_chunk_size; 1724 int chunk_index = index % trace_chunk_size; 1725 while (chunk != NULL && skip_chunks > 0) { 1726 chunk = objArrayOop(chunk->obj_at(trace_next_offset)); 1727 skip_chunks--; 1728 } 1729 if (chunk == NULL) { 1730 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 1731 } 1732 // Get method id, bci, version and mirror from chunk 1733 typeArrayOop methods = BacktraceBuilder::get_methods(chunk); 1734 typeArrayOop bcis = BacktraceBuilder::get_bcis(chunk); 1735 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk); 1736 1737 assert(methods != NULL && bcis != NULL && mirrors != NULL, "sanity check"); 1738 1739 int method = methods->short_at(chunk_index); 1740 int version = version_at(bcis->int_at(chunk_index)); 1741 int bci = bci_at(bcis->int_at(chunk_index)); 1742 Handle mirror(THREAD, mirrors->obj_at(chunk_index)); 1743 1744 // Chunk can be partial full 1745 if (mirror.is_null()) { 1746 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 1747 } 1748 1749 oop element = java_lang_StackTraceElement::create(mirror, method, version, bci, CHECK_0); 1750 return element; 1751 } 1752 1753 oop java_lang_StackTraceElement::create(Handle mirror, int method_id, int version, int bci, TRAPS) { 1754 // Allocate java.lang.StackTraceElement instance 1755 Klass* k = SystemDictionary::StackTraceElement_klass(); 1756 assert(k != NULL, "must be loaded in 1.4+"); 1757 instanceKlassHandle ik (THREAD, k); 1758 if (ik->should_be_initialized()) { 1759 ik->initialize(CHECK_0); 1760 } 1761 1762 Handle element = ik->allocate_instance_handle(CHECK_0); 1763 // Fill in class name 1764 ResourceMark rm(THREAD); 1765 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 1766 const char* str = holder->external_name(); 1767 oop classname = StringTable::intern((char*) str, CHECK_0); 1768 java_lang_StackTraceElement::set_declaringClass(element(), classname); 1769 1770 // Fill in method name 1771 Method* method = holder->method_with_idnum(method_id); 1772 oop methodname = StringTable::intern(method->name(), CHECK_0); 1773 java_lang_StackTraceElement::set_methodName(element(), methodname); 1774 1775 if (!version_matches(method, version)) { 1776 // The method was redefined, accurate line number information isn't available 1777 java_lang_StackTraceElement::set_fileName(element(), NULL); 1778 java_lang_StackTraceElement::set_lineNumber(element(), -1); 1779 } else { 1780 // Fill in source file name and line number. 1781 Symbol* source = holder->source_file_name(); 1782 if (ShowHiddenFrames && source == NULL) 1783 source = vmSymbols::unknown_class_name(); 1784 oop filename = StringTable::intern(source, CHECK_0); 1785 java_lang_StackTraceElement::set_fileName(element(), filename); 1786 1787 int line_number = get_line_number(method, bci); 1788 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 1789 } 1790 return element(); 1791 } 1792 1793 oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) { 1794 Handle mirror (THREAD, method->method_holder()->java_mirror()); 1795 int method_id = method->method_idnum(); 1796 return create(mirror, method_id, method->constants()->version(), bci, THREAD); 1797 } 1798 1799 void java_lang_reflect_AccessibleObject::compute_offsets() { 1800 Klass* k = SystemDictionary::reflect_AccessibleObject_klass(); 1801 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature()); 1802 } 1803 1804 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 1805 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1806 return (jboolean) reflect->bool_field(override_offset); 1807 } 1808 1809 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 1810 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1811 reflect->bool_field_put(override_offset, (int) value); 1812 } 1813 1814 void java_lang_reflect_Method::compute_offsets() { 1815 Klass* k = SystemDictionary::reflect_Method_klass(); 1816 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 1817 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1818 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature()); 1819 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 1820 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 1821 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 1822 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 1823 // The generic signature and annotations fields are only present in 1.5 1824 signature_offset = -1; 1825 annotations_offset = -1; 1826 parameter_annotations_offset = -1; 1827 annotation_default_offset = -1; 1828 type_annotations_offset = -1; 1829 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 1830 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 1831 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 1832 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature()); 1833 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 1834 } 1835 1836 Handle java_lang_reflect_Method::create(TRAPS) { 1837 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1838 Klass* klass = SystemDictionary::reflect_Method_klass(); 1839 // This class is eagerly initialized during VM initialization, since we keep a refence 1840 // to one of the methods 1841 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized"); 1842 return InstanceKlass::cast(klass)->allocate_instance_handle(CHECK_NH); 1843 } 1844 1845 oop java_lang_reflect_Method::clazz(oop reflect) { 1846 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1847 return reflect->obj_field(clazz_offset); 1848 } 1849 1850 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 1851 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1852 reflect->obj_field_put(clazz_offset, value); 1853 } 1854 1855 int java_lang_reflect_Method::slot(oop reflect) { 1856 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1857 return reflect->int_field(slot_offset); 1858 } 1859 1860 void java_lang_reflect_Method::set_slot(oop reflect, int value) { 1861 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1862 reflect->int_field_put(slot_offset, value); 1863 } 1864 1865 oop java_lang_reflect_Method::name(oop method) { 1866 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1867 return method->obj_field(name_offset); 1868 } 1869 1870 void java_lang_reflect_Method::set_name(oop method, oop value) { 1871 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1872 method->obj_field_put(name_offset, value); 1873 } 1874 1875 oop java_lang_reflect_Method::return_type(oop method) { 1876 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1877 return method->obj_field(returnType_offset); 1878 } 1879 1880 void java_lang_reflect_Method::set_return_type(oop method, oop value) { 1881 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1882 method->obj_field_put(returnType_offset, value); 1883 } 1884 1885 oop java_lang_reflect_Method::parameter_types(oop method) { 1886 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1887 return method->obj_field(parameterTypes_offset); 1888 } 1889 1890 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 1891 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1892 method->obj_field_put(parameterTypes_offset, value); 1893 } 1894 1895 oop java_lang_reflect_Method::exception_types(oop method) { 1896 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1897 return method->obj_field(exceptionTypes_offset); 1898 } 1899 1900 void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 1901 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1902 method->obj_field_put(exceptionTypes_offset, value); 1903 } 1904 1905 int java_lang_reflect_Method::modifiers(oop method) { 1906 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1907 return method->int_field(modifiers_offset); 1908 } 1909 1910 void java_lang_reflect_Method::set_modifiers(oop method, int value) { 1911 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1912 method->int_field_put(modifiers_offset, value); 1913 } 1914 1915 bool java_lang_reflect_Method::has_signature_field() { 1916 return (signature_offset >= 0); 1917 } 1918 1919 oop java_lang_reflect_Method::signature(oop method) { 1920 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1921 assert(has_signature_field(), "signature field must be present"); 1922 return method->obj_field(signature_offset); 1923 } 1924 1925 void java_lang_reflect_Method::set_signature(oop method, oop value) { 1926 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1927 assert(has_signature_field(), "signature field must be present"); 1928 method->obj_field_put(signature_offset, value); 1929 } 1930 1931 bool java_lang_reflect_Method::has_annotations_field() { 1932 return (annotations_offset >= 0); 1933 } 1934 1935 oop java_lang_reflect_Method::annotations(oop method) { 1936 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1937 assert(has_annotations_field(), "annotations field must be present"); 1938 return method->obj_field(annotations_offset); 1939 } 1940 1941 void java_lang_reflect_Method::set_annotations(oop method, oop value) { 1942 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1943 assert(has_annotations_field(), "annotations field must be present"); 1944 method->obj_field_put(annotations_offset, value); 1945 } 1946 1947 bool java_lang_reflect_Method::has_parameter_annotations_field() { 1948 return (parameter_annotations_offset >= 0); 1949 } 1950 1951 oop java_lang_reflect_Method::parameter_annotations(oop method) { 1952 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1953 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 1954 return method->obj_field(parameter_annotations_offset); 1955 } 1956 1957 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 1958 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1959 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 1960 method->obj_field_put(parameter_annotations_offset, value); 1961 } 1962 1963 bool java_lang_reflect_Method::has_annotation_default_field() { 1964 return (annotation_default_offset >= 0); 1965 } 1966 1967 oop java_lang_reflect_Method::annotation_default(oop method) { 1968 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1969 assert(has_annotation_default_field(), "annotation default field must be present"); 1970 return method->obj_field(annotation_default_offset); 1971 } 1972 1973 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 1974 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1975 assert(has_annotation_default_field(), "annotation default field must be present"); 1976 method->obj_field_put(annotation_default_offset, value); 1977 } 1978 1979 bool java_lang_reflect_Method::has_type_annotations_field() { 1980 return (type_annotations_offset >= 0); 1981 } 1982 1983 oop java_lang_reflect_Method::type_annotations(oop method) { 1984 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1985 assert(has_type_annotations_field(), "type_annotations field must be present"); 1986 return method->obj_field(type_annotations_offset); 1987 } 1988 1989 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) { 1990 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1991 assert(has_type_annotations_field(), "type_annotations field must be present"); 1992 method->obj_field_put(type_annotations_offset, value); 1993 } 1994 1995 void java_lang_reflect_Constructor::compute_offsets() { 1996 Klass* k = SystemDictionary::reflect_Constructor_klass(); 1997 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 1998 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 1999 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 2000 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 2001 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2002 // The generic signature and annotations fields are only present in 1.5 2003 signature_offset = -1; 2004 annotations_offset = -1; 2005 parameter_annotations_offset = -1; 2006 type_annotations_offset = -1; 2007 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 2008 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 2009 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 2010 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 2011 } 2012 2013 Handle java_lang_reflect_Constructor::create(TRAPS) { 2014 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2015 Symbol* name = vmSymbols::java_lang_reflect_Constructor(); 2016 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2017 instanceKlassHandle klass (THREAD, k); 2018 // Ensure it is initialized 2019 klass->initialize(CHECK_NH); 2020 return klass->allocate_instance_handle(CHECK_NH); 2021 } 2022 2023 oop java_lang_reflect_Constructor::clazz(oop reflect) { 2024 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2025 return reflect->obj_field(clazz_offset); 2026 } 2027 2028 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 2029 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2030 reflect->obj_field_put(clazz_offset, value); 2031 } 2032 2033 oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 2034 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2035 return constructor->obj_field(parameterTypes_offset); 2036 } 2037 2038 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 2039 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2040 constructor->obj_field_put(parameterTypes_offset, value); 2041 } 2042 2043 oop java_lang_reflect_Constructor::exception_types(oop constructor) { 2044 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2045 return constructor->obj_field(exceptionTypes_offset); 2046 } 2047 2048 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 2049 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2050 constructor->obj_field_put(exceptionTypes_offset, value); 2051 } 2052 2053 int java_lang_reflect_Constructor::slot(oop reflect) { 2054 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2055 return reflect->int_field(slot_offset); 2056 } 2057 2058 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 2059 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2060 reflect->int_field_put(slot_offset, value); 2061 } 2062 2063 int java_lang_reflect_Constructor::modifiers(oop constructor) { 2064 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2065 return constructor->int_field(modifiers_offset); 2066 } 2067 2068 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 2069 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2070 constructor->int_field_put(modifiers_offset, value); 2071 } 2072 2073 bool java_lang_reflect_Constructor::has_signature_field() { 2074 return (signature_offset >= 0); 2075 } 2076 2077 oop java_lang_reflect_Constructor::signature(oop constructor) { 2078 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2079 assert(has_signature_field(), "signature field must be present"); 2080 return constructor->obj_field(signature_offset); 2081 } 2082 2083 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 2084 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2085 assert(has_signature_field(), "signature field must be present"); 2086 constructor->obj_field_put(signature_offset, value); 2087 } 2088 2089 bool java_lang_reflect_Constructor::has_annotations_field() { 2090 return (annotations_offset >= 0); 2091 } 2092 2093 oop java_lang_reflect_Constructor::annotations(oop constructor) { 2094 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2095 assert(has_annotations_field(), "annotations field must be present"); 2096 return constructor->obj_field(annotations_offset); 2097 } 2098 2099 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 2100 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2101 assert(has_annotations_field(), "annotations field must be present"); 2102 constructor->obj_field_put(annotations_offset, value); 2103 } 2104 2105 bool java_lang_reflect_Constructor::has_parameter_annotations_field() { 2106 return (parameter_annotations_offset >= 0); 2107 } 2108 2109 oop java_lang_reflect_Constructor::parameter_annotations(oop method) { 2110 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2111 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2112 return method->obj_field(parameter_annotations_offset); 2113 } 2114 2115 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 2116 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2117 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2118 method->obj_field_put(parameter_annotations_offset, value); 2119 } 2120 2121 bool java_lang_reflect_Constructor::has_type_annotations_field() { 2122 return (type_annotations_offset >= 0); 2123 } 2124 2125 oop java_lang_reflect_Constructor::type_annotations(oop constructor) { 2126 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2127 assert(has_type_annotations_field(), "type_annotations field must be present"); 2128 return constructor->obj_field(type_annotations_offset); 2129 } 2130 2131 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) { 2132 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2133 assert(has_type_annotations_field(), "type_annotations field must be present"); 2134 constructor->obj_field_put(type_annotations_offset, value); 2135 } 2136 2137 void java_lang_reflect_Field::compute_offsets() { 2138 Klass* k = SystemDictionary::reflect_Field_klass(); 2139 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2140 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2141 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature()); 2142 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 2143 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2144 // The generic signature and annotations fields are only present in 1.5 2145 signature_offset = -1; 2146 annotations_offset = -1; 2147 type_annotations_offset = -1; 2148 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 2149 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 2150 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 2151 } 2152 2153 Handle java_lang_reflect_Field::create(TRAPS) { 2154 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2155 Symbol* name = vmSymbols::java_lang_reflect_Field(); 2156 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2157 instanceKlassHandle klass (THREAD, k); 2158 // Ensure it is initialized 2159 klass->initialize(CHECK_NH); 2160 return klass->allocate_instance_handle(CHECK_NH); 2161 } 2162 2163 oop java_lang_reflect_Field::clazz(oop reflect) { 2164 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2165 return reflect->obj_field(clazz_offset); 2166 } 2167 2168 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 2169 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2170 reflect->obj_field_put(clazz_offset, value); 2171 } 2172 2173 oop java_lang_reflect_Field::name(oop field) { 2174 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2175 return field->obj_field(name_offset); 2176 } 2177 2178 void java_lang_reflect_Field::set_name(oop field, oop value) { 2179 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2180 field->obj_field_put(name_offset, value); 2181 } 2182 2183 oop java_lang_reflect_Field::type(oop field) { 2184 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2185 return field->obj_field(type_offset); 2186 } 2187 2188 void java_lang_reflect_Field::set_type(oop field, oop value) { 2189 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2190 field->obj_field_put(type_offset, value); 2191 } 2192 2193 int java_lang_reflect_Field::slot(oop reflect) { 2194 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2195 return reflect->int_field(slot_offset); 2196 } 2197 2198 void java_lang_reflect_Field::set_slot(oop reflect, int value) { 2199 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2200 reflect->int_field_put(slot_offset, value); 2201 } 2202 2203 int java_lang_reflect_Field::modifiers(oop field) { 2204 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2205 return field->int_field(modifiers_offset); 2206 } 2207 2208 void java_lang_reflect_Field::set_modifiers(oop field, int value) { 2209 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2210 field->int_field_put(modifiers_offset, value); 2211 } 2212 2213 bool java_lang_reflect_Field::has_signature_field() { 2214 return (signature_offset >= 0); 2215 } 2216 2217 oop java_lang_reflect_Field::signature(oop field) { 2218 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2219 assert(has_signature_field(), "signature field must be present"); 2220 return field->obj_field(signature_offset); 2221 } 2222 2223 void java_lang_reflect_Field::set_signature(oop field, oop value) { 2224 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2225 assert(has_signature_field(), "signature field must be present"); 2226 field->obj_field_put(signature_offset, value); 2227 } 2228 2229 bool java_lang_reflect_Field::has_annotations_field() { 2230 return (annotations_offset >= 0); 2231 } 2232 2233 oop java_lang_reflect_Field::annotations(oop field) { 2234 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2235 assert(has_annotations_field(), "annotations field must be present"); 2236 return field->obj_field(annotations_offset); 2237 } 2238 2239 void java_lang_reflect_Field::set_annotations(oop field, oop value) { 2240 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2241 assert(has_annotations_field(), "annotations field must be present"); 2242 field->obj_field_put(annotations_offset, value); 2243 } 2244 2245 bool java_lang_reflect_Field::has_type_annotations_field() { 2246 return (type_annotations_offset >= 0); 2247 } 2248 2249 oop java_lang_reflect_Field::type_annotations(oop field) { 2250 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2251 assert(has_type_annotations_field(), "type_annotations field must be present"); 2252 return field->obj_field(type_annotations_offset); 2253 } 2254 2255 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) { 2256 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2257 assert(has_type_annotations_field(), "type_annotations field must be present"); 2258 field->obj_field_put(type_annotations_offset, value); 2259 } 2260 2261 void sun_reflect_ConstantPool::compute_offsets() { 2262 Klass* k = SystemDictionary::reflect_ConstantPool_klass(); 2263 // This null test can be removed post beta 2264 if (k != NULL) { 2265 // The field is called ConstantPool* in the sun.reflect.ConstantPool class. 2266 compute_offset(_oop_offset, k, vmSymbols::ConstantPool_name(), vmSymbols::object_signature()); 2267 } 2268 } 2269 2270 void java_lang_reflect_Parameter::compute_offsets() { 2271 Klass* k = SystemDictionary::reflect_Parameter_klass(); 2272 if(NULL != k) { 2273 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2274 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2275 compute_offset(index_offset, k, vmSymbols::index_name(), vmSymbols::int_signature()); 2276 compute_offset(executable_offset, k, vmSymbols::executable_name(), vmSymbols::executable_signature()); 2277 } 2278 } 2279 2280 Handle java_lang_reflect_Parameter::create(TRAPS) { 2281 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2282 Symbol* name = vmSymbols::java_lang_reflect_Parameter(); 2283 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2284 instanceKlassHandle klass (THREAD, k); 2285 // Ensure it is initialized 2286 klass->initialize(CHECK_NH); 2287 return klass->allocate_instance_handle(CHECK_NH); 2288 } 2289 2290 oop java_lang_reflect_Parameter::name(oop param) { 2291 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2292 return param->obj_field(name_offset); 2293 } 2294 2295 void java_lang_reflect_Parameter::set_name(oop param, oop value) { 2296 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2297 param->obj_field_put(name_offset, value); 2298 } 2299 2300 int java_lang_reflect_Parameter::modifiers(oop param) { 2301 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2302 return param->int_field(modifiers_offset); 2303 } 2304 2305 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) { 2306 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2307 param->int_field_put(modifiers_offset, value); 2308 } 2309 2310 int java_lang_reflect_Parameter::index(oop param) { 2311 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2312 return param->int_field(index_offset); 2313 } 2314 2315 void java_lang_reflect_Parameter::set_index(oop param, int value) { 2316 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2317 param->int_field_put(index_offset, value); 2318 } 2319 2320 oop java_lang_reflect_Parameter::executable(oop param) { 2321 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2322 return param->obj_field(executable_offset); 2323 } 2324 2325 void java_lang_reflect_Parameter::set_executable(oop param, oop value) { 2326 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2327 param->obj_field_put(executable_offset, value); 2328 } 2329 2330 2331 Handle sun_reflect_ConstantPool::create(TRAPS) { 2332 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2333 Klass* k = SystemDictionary::reflect_ConstantPool_klass(); 2334 instanceKlassHandle klass (THREAD, k); 2335 // Ensure it is initialized 2336 klass->initialize(CHECK_NH); 2337 return klass->allocate_instance_handle(CHECK_NH); 2338 } 2339 2340 2341 void sun_reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) { 2342 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2343 oop mirror = value->pool_holder()->java_mirror(); 2344 // Save the mirror to get back the constant pool. 2345 reflect->obj_field_put(_oop_offset, mirror); 2346 } 2347 2348 ConstantPool* sun_reflect_ConstantPool::get_cp(oop reflect) { 2349 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2350 2351 oop mirror = reflect->obj_field(_oop_offset); 2352 Klass* k = java_lang_Class::as_Klass(mirror); 2353 assert(k->oop_is_instance(), "Must be"); 2354 2355 // Get the constant pool back from the klass. Since class redefinition 2356 // merges the new constant pool into the old, this is essentially the 2357 // same constant pool as the original. If constant pool merging is 2358 // no longer done in the future, this will have to change to save 2359 // the original. 2360 return InstanceKlass::cast(k)->constants(); 2361 } 2362 2363 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() { 2364 Klass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass(); 2365 // This null test can be removed post beta 2366 if (k != NULL) { 2367 compute_offset(_base_offset, k, 2368 vmSymbols::base_name(), vmSymbols::object_signature()); 2369 } 2370 } 2371 2372 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 2373 Klass* k = SystemDictionary::box_klass(type); 2374 if (k == NULL) return NULL; 2375 instanceKlassHandle h (THREAD, k); 2376 if (!h->is_initialized()) h->initialize(CHECK_0); 2377 return h->allocate_instance(THREAD); 2378 } 2379 2380 2381 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 2382 oop box = initialize_and_allocate(type, CHECK_0); 2383 if (box == NULL) return NULL; 2384 switch (type) { 2385 case T_BOOLEAN: 2386 box->bool_field_put(value_offset, value->z); 2387 break; 2388 case T_CHAR: 2389 box->char_field_put(value_offset, value->c); 2390 break; 2391 case T_FLOAT: 2392 box->float_field_put(value_offset, value->f); 2393 break; 2394 case T_DOUBLE: 2395 box->double_field_put(long_value_offset, value->d); 2396 break; 2397 case T_BYTE: 2398 box->byte_field_put(value_offset, value->b); 2399 break; 2400 case T_SHORT: 2401 box->short_field_put(value_offset, value->s); 2402 break; 2403 case T_INT: 2404 box->int_field_put(value_offset, value->i); 2405 break; 2406 case T_LONG: 2407 box->long_field_put(long_value_offset, value->j); 2408 break; 2409 default: 2410 return NULL; 2411 } 2412 return box; 2413 } 2414 2415 2416 BasicType java_lang_boxing_object::basic_type(oop box) { 2417 if (box == NULL) return T_ILLEGAL; 2418 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2419 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 2420 return T_ILLEGAL; 2421 return type; 2422 } 2423 2424 2425 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 2426 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2427 switch (type) { 2428 case T_BOOLEAN: 2429 value->z = box->bool_field(value_offset); 2430 break; 2431 case T_CHAR: 2432 value->c = box->char_field(value_offset); 2433 break; 2434 case T_FLOAT: 2435 value->f = box->float_field(value_offset); 2436 break; 2437 case T_DOUBLE: 2438 value->d = box->double_field(long_value_offset); 2439 break; 2440 case T_BYTE: 2441 value->b = box->byte_field(value_offset); 2442 break; 2443 case T_SHORT: 2444 value->s = box->short_field(value_offset); 2445 break; 2446 case T_INT: 2447 value->i = box->int_field(value_offset); 2448 break; 2449 case T_LONG: 2450 value->j = box->long_field(long_value_offset); 2451 break; 2452 default: 2453 return T_ILLEGAL; 2454 } // end switch 2455 return type; 2456 } 2457 2458 2459 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 2460 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2461 switch (type) { 2462 case T_BOOLEAN: 2463 box->bool_field_put(value_offset, value->z); 2464 break; 2465 case T_CHAR: 2466 box->char_field_put(value_offset, value->c); 2467 break; 2468 case T_FLOAT: 2469 box->float_field_put(value_offset, value->f); 2470 break; 2471 case T_DOUBLE: 2472 box->double_field_put(long_value_offset, value->d); 2473 break; 2474 case T_BYTE: 2475 box->byte_field_put(value_offset, value->b); 2476 break; 2477 case T_SHORT: 2478 box->short_field_put(value_offset, value->s); 2479 break; 2480 case T_INT: 2481 box->int_field_put(value_offset, value->i); 2482 break; 2483 case T_LONG: 2484 box->long_field_put(long_value_offset, value->j); 2485 break; 2486 default: 2487 return T_ILLEGAL; 2488 } // end switch 2489 return type; 2490 } 2491 2492 2493 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) { 2494 switch (type) { 2495 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break; 2496 case T_CHAR: st->print("%d", value->c); break; 2497 case T_BYTE: st->print("%d", value->b); break; 2498 case T_SHORT: st->print("%d", value->s); break; 2499 case T_INT: st->print("%d", value->i); break; 2500 case T_LONG: st->print(INT64_FORMAT, value->j); break; 2501 case T_FLOAT: st->print("%f", value->f); break; 2502 case T_DOUBLE: st->print("%lf", value->d); break; 2503 default: st->print("type %d?", type); break; 2504 } 2505 } 2506 2507 2508 // Support for java_lang_ref_Reference 2509 HeapWord *java_lang_ref_Reference::pending_list_lock_addr() { 2510 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass()); 2511 address addr = ik->static_field_addr(static_lock_offset); 2512 return (HeapWord*) addr; 2513 } 2514 2515 oop java_lang_ref_Reference::pending_list_lock() { 2516 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass()); 2517 address addr = ik->static_field_addr(static_lock_offset); 2518 if (UseCompressedOops) { 2519 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 2520 } else { 2521 return oopDesc::load_decode_heap_oop((oop*)addr); 2522 } 2523 } 2524 2525 HeapWord *java_lang_ref_Reference::pending_list_addr() { 2526 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass()); 2527 address addr = ik->static_field_addr(static_pending_offset); 2528 // XXX This might not be HeapWord aligned, almost rather be char *. 2529 return (HeapWord*)addr; 2530 } 2531 2532 oop java_lang_ref_Reference::pending_list() { 2533 char *addr = (char *)pending_list_addr(); 2534 if (UseCompressedOops) { 2535 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 2536 } else { 2537 return oopDesc::load_decode_heap_oop((oop*)addr); 2538 } 2539 } 2540 2541 2542 // Support for java_lang_ref_SoftReference 2543 2544 jlong java_lang_ref_SoftReference::timestamp(oop ref) { 2545 return ref->long_field(timestamp_offset); 2546 } 2547 2548 jlong java_lang_ref_SoftReference::clock() { 2549 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass()); 2550 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset); 2551 return *offset; 2552 } 2553 2554 void java_lang_ref_SoftReference::set_clock(jlong value) { 2555 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass()); 2556 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset); 2557 *offset = value; 2558 } 2559 2560 // Support for java_lang_invoke_DirectMethodHandle 2561 2562 int java_lang_invoke_DirectMethodHandle::_member_offset; 2563 2564 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) { 2565 oop member_name = NULL; 2566 bool is_dmh = dmh->is_oop() && java_lang_invoke_DirectMethodHandle::is_instance(dmh); 2567 assert(is_dmh, "a DirectMethodHandle oop is expected"); 2568 if (is_dmh) { 2569 member_name = dmh->obj_field(member_offset_in_bytes()); 2570 } 2571 return member_name; 2572 } 2573 2574 void java_lang_invoke_DirectMethodHandle::compute_offsets() { 2575 Klass* klass_oop = SystemDictionary::DirectMethodHandle_klass(); 2576 if (klass_oop != NULL && EnableInvokeDynamic) { 2577 compute_offset(_member_offset, klass_oop, vmSymbols::member_name(), vmSymbols::java_lang_invoke_MemberName_signature()); 2578 } 2579 } 2580 2581 // Support for java_lang_invoke_MethodHandle 2582 2583 int java_lang_invoke_MethodHandle::_type_offset; 2584 int java_lang_invoke_MethodHandle::_form_offset; 2585 2586 int java_lang_invoke_MemberName::_clazz_offset; 2587 int java_lang_invoke_MemberName::_name_offset; 2588 int java_lang_invoke_MemberName::_type_offset; 2589 int java_lang_invoke_MemberName::_flags_offset; 2590 int java_lang_invoke_MemberName::_vmtarget_offset; 2591 int java_lang_invoke_MemberName::_vmloader_offset; 2592 int java_lang_invoke_MemberName::_vmindex_offset; 2593 2594 int java_lang_invoke_LambdaForm::_vmentry_offset; 2595 2596 void java_lang_invoke_MethodHandle::compute_offsets() { 2597 Klass* klass_oop = SystemDictionary::MethodHandle_klass(); 2598 if (klass_oop != NULL && EnableInvokeDynamic) { 2599 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature()); 2600 compute_optional_offset(_form_offset, klass_oop, vmSymbols::form_name(), vmSymbols::java_lang_invoke_LambdaForm_signature()); 2601 if (_form_offset == 0) { 2602 EnableInvokeDynamic = false; 2603 } 2604 } 2605 } 2606 2607 void java_lang_invoke_MemberName::compute_offsets() { 2608 Klass* klass_oop = SystemDictionary::MemberName_klass(); 2609 if (klass_oop != NULL && EnableInvokeDynamic) { 2610 compute_offset(_clazz_offset, klass_oop, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2611 compute_offset(_name_offset, klass_oop, vmSymbols::name_name(), vmSymbols::string_signature()); 2612 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::object_signature()); 2613 compute_offset(_flags_offset, klass_oop, vmSymbols::flags_name(), vmSymbols::int_signature()); 2614 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 2615 } 2616 } 2617 2618 void java_lang_invoke_LambdaForm::compute_offsets() { 2619 Klass* klass_oop = SystemDictionary::LambdaForm_klass(); 2620 if (klass_oop != NULL && EnableInvokeDynamic) { 2621 compute_offset(_vmentry_offset, klass_oop, vmSymbols::vmentry_name(), vmSymbols::java_lang_invoke_MemberName_signature()); 2622 } 2623 } 2624 2625 oop java_lang_invoke_MethodHandle::type(oop mh) { 2626 return mh->obj_field(_type_offset); 2627 } 2628 2629 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) { 2630 mh->obj_field_put(_type_offset, mtype); 2631 } 2632 2633 oop java_lang_invoke_MethodHandle::form(oop mh) { 2634 assert(_form_offset != 0, ""); 2635 return mh->obj_field(_form_offset); 2636 } 2637 2638 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) { 2639 assert(_form_offset != 0, ""); 2640 mh->obj_field_put(_form_offset, lform); 2641 } 2642 2643 /// MemberName accessors 2644 2645 oop java_lang_invoke_MemberName::clazz(oop mname) { 2646 assert(is_instance(mname), "wrong type"); 2647 return mname->obj_field(_clazz_offset); 2648 } 2649 2650 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) { 2651 assert(is_instance(mname), "wrong type"); 2652 mname->obj_field_put(_clazz_offset, clazz); 2653 } 2654 2655 oop java_lang_invoke_MemberName::name(oop mname) { 2656 assert(is_instance(mname), "wrong type"); 2657 return mname->obj_field(_name_offset); 2658 } 2659 2660 void java_lang_invoke_MemberName::set_name(oop mname, oop name) { 2661 assert(is_instance(mname), "wrong type"); 2662 mname->obj_field_put(_name_offset, name); 2663 } 2664 2665 oop java_lang_invoke_MemberName::type(oop mname) { 2666 assert(is_instance(mname), "wrong type"); 2667 return mname->obj_field(_type_offset); 2668 } 2669 2670 void java_lang_invoke_MemberName::set_type(oop mname, oop type) { 2671 assert(is_instance(mname), "wrong type"); 2672 mname->obj_field_put(_type_offset, type); 2673 } 2674 2675 int java_lang_invoke_MemberName::flags(oop mname) { 2676 assert(is_instance(mname), "wrong type"); 2677 return mname->int_field(_flags_offset); 2678 } 2679 2680 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) { 2681 assert(is_instance(mname), "wrong type"); 2682 mname->int_field_put(_flags_offset, flags); 2683 } 2684 2685 Metadata* java_lang_invoke_MemberName::vmtarget(oop mname) { 2686 assert(is_instance(mname), "wrong type"); 2687 return (Metadata*)mname->address_field(_vmtarget_offset); 2688 } 2689 2690 #if INCLUDE_JVMTI 2691 // Can be executed on VM thread only 2692 void java_lang_invoke_MemberName::adjust_vmtarget(oop mname, Metadata* ref) { 2693 assert((is_instance(mname) && (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0), "wrong type"); 2694 assert(Thread::current()->is_VM_thread(), "not VM thread"); 2695 mname->address_field_put(_vmtarget_offset, (address)ref); 2696 } 2697 #endif // INCLUDE_JVMTI 2698 2699 void java_lang_invoke_MemberName::set_vmtarget(oop mname, Metadata* ref) { 2700 assert(is_instance(mname), "wrong type"); 2701 // check the type of the vmtarget 2702 oop dependency = NULL; 2703 if (ref != NULL) { 2704 switch (flags(mname) & (MN_IS_METHOD | 2705 MN_IS_CONSTRUCTOR | 2706 MN_IS_FIELD)) { 2707 case MN_IS_METHOD: 2708 case MN_IS_CONSTRUCTOR: 2709 assert(ref->is_method(), "should be a method"); 2710 dependency = ((Method*)ref)->method_holder()->java_mirror(); 2711 break; 2712 case MN_IS_FIELD: 2713 assert(ref->is_klass(), "should be a class"); 2714 dependency = ((Klass*)ref)->java_mirror(); 2715 break; 2716 default: 2717 ShouldNotReachHere(); 2718 } 2719 } 2720 mname->address_field_put(_vmtarget_offset, (address)ref); 2721 // Add a reference to the loader (actually mirror because anonymous classes will not have 2722 // distinct loaders) to ensure the metadata is kept alive 2723 // This mirror may be different than the one in clazz field. 2724 mname->obj_field_put(_vmloader_offset, dependency); 2725 } 2726 2727 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) { 2728 assert(is_instance(mname), "wrong type"); 2729 return (intptr_t) mname->address_field(_vmindex_offset); 2730 } 2731 2732 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) { 2733 assert(is_instance(mname), "wrong type"); 2734 mname->address_field_put(_vmindex_offset, (address) index); 2735 } 2736 2737 oop java_lang_invoke_LambdaForm::vmentry(oop lform) { 2738 assert(is_instance(lform), "wrong type"); 2739 return lform->obj_field(_vmentry_offset); 2740 } 2741 2742 2743 // Support for java_lang_invoke_MethodType 2744 2745 int java_lang_invoke_MethodType::_rtype_offset; 2746 int java_lang_invoke_MethodType::_ptypes_offset; 2747 2748 void java_lang_invoke_MethodType::compute_offsets() { 2749 Klass* k = SystemDictionary::MethodType_klass(); 2750 if (k != NULL) { 2751 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature()); 2752 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature()); 2753 } 2754 } 2755 2756 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) { 2757 st->print("("); 2758 objArrayOop pts = ptypes(mt); 2759 for (int i = 0, limit = pts->length(); i < limit; i++) { 2760 java_lang_Class::print_signature(pts->obj_at(i), st); 2761 } 2762 st->print(")"); 2763 java_lang_Class::print_signature(rtype(mt), st); 2764 } 2765 2766 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) { 2767 ResourceMark rm; 2768 stringStream buffer(128); 2769 print_signature(mt, &buffer); 2770 const char* sigstr = buffer.base(); 2771 int siglen = (int) buffer.size(); 2772 Symbol *name; 2773 if (!intern_if_not_found) { 2774 name = SymbolTable::probe(sigstr, siglen); 2775 } else { 2776 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 2777 } 2778 return name; 2779 } 2780 2781 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) { 2782 if (mt1 == mt2) 2783 return true; 2784 if (rtype(mt1) != rtype(mt2)) 2785 return false; 2786 if (ptype_count(mt1) != ptype_count(mt2)) 2787 return false; 2788 for (int i = ptype_count(mt1) - 1; i >= 0; i--) { 2789 if (ptype(mt1, i) != ptype(mt2, i)) 2790 return false; 2791 } 2792 return true; 2793 } 2794 2795 oop java_lang_invoke_MethodType::rtype(oop mt) { 2796 assert(is_instance(mt), "must be a MethodType"); 2797 return mt->obj_field(_rtype_offset); 2798 } 2799 2800 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) { 2801 assert(is_instance(mt), "must be a MethodType"); 2802 return (objArrayOop) mt->obj_field(_ptypes_offset); 2803 } 2804 2805 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) { 2806 return ptypes(mt)->obj_at(idx); 2807 } 2808 2809 int java_lang_invoke_MethodType::ptype_count(oop mt) { 2810 return ptypes(mt)->length(); 2811 } 2812 2813 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) { 2814 objArrayOop pts = ptypes(mt); 2815 int count = pts->length(); 2816 int slots = 0; 2817 for (int i = 0; i < count; i++) { 2818 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i)); 2819 slots += type2size[bt]; 2820 } 2821 return slots; 2822 } 2823 2824 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) { 2825 BasicType bt = java_lang_Class::as_BasicType(rtype(mt)); 2826 return type2size[bt]; 2827 } 2828 2829 2830 // Support for java_lang_invoke_CallSite 2831 2832 int java_lang_invoke_CallSite::_target_offset; 2833 2834 void java_lang_invoke_CallSite::compute_offsets() { 2835 if (!EnableInvokeDynamic) return; 2836 Klass* k = SystemDictionary::CallSite_klass(); 2837 if (k != NULL) { 2838 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature()); 2839 } 2840 } 2841 2842 2843 // Support for java_security_AccessControlContext 2844 2845 int java_security_AccessControlContext::_context_offset = 0; 2846 int java_security_AccessControlContext::_privilegedContext_offset = 0; 2847 int java_security_AccessControlContext::_isPrivileged_offset = 0; 2848 int java_security_AccessControlContext::_isAuthorized_offset = -1; 2849 2850 void java_security_AccessControlContext::compute_offsets() { 2851 assert(_isPrivileged_offset == 0, "offsets should be initialized only once"); 2852 fieldDescriptor fd; 2853 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass()); 2854 2855 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) { 2856 fatal("Invalid layout of java.security.AccessControlContext"); 2857 } 2858 _context_offset = fd.offset(); 2859 2860 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) { 2861 fatal("Invalid layout of java.security.AccessControlContext"); 2862 } 2863 _privilegedContext_offset = fd.offset(); 2864 2865 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) { 2866 fatal("Invalid layout of java.security.AccessControlContext"); 2867 } 2868 _isPrivileged_offset = fd.offset(); 2869 2870 // The offset may not be present for bootstrapping with older JDK. 2871 if (ik->find_local_field(vmSymbols::isAuthorized_name(), vmSymbols::bool_signature(), &fd)) { 2872 _isAuthorized_offset = fd.offset(); 2873 } 2874 } 2875 2876 2877 bool java_security_AccessControlContext::is_authorized(Handle context) { 2878 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type"); 2879 assert(_isAuthorized_offset != -1, "should be set"); 2880 return context->bool_field(_isAuthorized_offset) != 0; 2881 } 2882 2883 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) { 2884 assert(_isPrivileged_offset != 0, "offsets should have been initialized"); 2885 // Ensure klass is initialized 2886 InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->initialize(CHECK_0); 2887 // Allocate result 2888 oop result = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->allocate_instance(CHECK_0); 2889 // Fill in values 2890 result->obj_field_put(_context_offset, context()); 2891 result->obj_field_put(_privilegedContext_offset, privileged_context()); 2892 result->bool_field_put(_isPrivileged_offset, isPrivileged); 2893 // whitelist AccessControlContexts created by the JVM if present 2894 if (_isAuthorized_offset != -1) { 2895 result->bool_field_put(_isAuthorized_offset, true); 2896 } 2897 return result; 2898 } 2899 2900 2901 // Support for java_lang_ClassLoader 2902 2903 bool java_lang_ClassLoader::offsets_computed = false; 2904 int java_lang_ClassLoader::_loader_data_offset = -1; 2905 int java_lang_ClassLoader::parallelCapable_offset = -1; 2906 2907 ClassLoaderData** java_lang_ClassLoader::loader_data_addr(oop loader) { 2908 assert(loader != NULL && loader->is_oop(), "loader must be oop"); 2909 return (ClassLoaderData**) loader->address_field_addr(_loader_data_offset); 2910 } 2911 2912 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) { 2913 return *java_lang_ClassLoader::loader_data_addr(loader); 2914 } 2915 2916 void java_lang_ClassLoader::compute_offsets() { 2917 assert(!offsets_computed, "offsets should be initialized only once"); 2918 offsets_computed = true; 2919 2920 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7, 2921 Klass* k1 = SystemDictionary::ClassLoader_klass(); 2922 compute_optional_offset(parallelCapable_offset, 2923 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature()); 2924 2925 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 2926 } 2927 2928 oop java_lang_ClassLoader::parent(oop loader) { 2929 assert(is_instance(loader), "loader must be oop"); 2930 return loader->obj_field(parent_offset); 2931 } 2932 2933 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) { 2934 assert(is_instance(loader), "loader must be oop"); 2935 assert(cl == NULL || is_instance(cl), "cl argument must be oop"); 2936 oop acl = loader; 2937 debug_only(jint loop_count = 0); 2938 // This loop taken verbatim from ClassLoader.java: 2939 do { 2940 acl = parent(acl); 2941 if (cl == acl) { 2942 return true; 2943 } 2944 assert(++loop_count > 0, "loop_count overflow"); 2945 } while (acl != NULL); 2946 return false; 2947 } 2948 2949 2950 // For class loader classes, parallelCapable defined 2951 // based on non-null field 2952 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it 2953 bool java_lang_ClassLoader::parallelCapable(oop class_loader) { 2954 if (!JDK_Version::is_gte_jdk17x_version() 2955 || parallelCapable_offset == -1) { 2956 // Default for backward compatibility is false 2957 return false; 2958 } 2959 return (class_loader->obj_field(parallelCapable_offset) != NULL); 2960 } 2961 2962 bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 2963 // Fix for 4474172; see evaluation for more details 2964 loader = non_reflection_class_loader(loader); 2965 2966 oop cl = SystemDictionary::java_system_loader(); 2967 while(cl != NULL) { 2968 if (cl == loader) return true; 2969 cl = parent(cl); 2970 } 2971 return false; 2972 } 2973 2974 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) { 2975 if (loader != NULL) { 2976 // See whether this is one of the class loaders associated with 2977 // the generated bytecodes for reflection, and if so, "magically" 2978 // delegate to its parent to prevent class loading from occurring 2979 // in places where applications using reflection didn't expect it. 2980 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass(); 2981 // This might be null in non-1.4 JDKs 2982 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) { 2983 return parent(loader); 2984 } 2985 } 2986 return loader; 2987 } 2988 2989 2990 // Support for java_lang_System 2991 int java_lang_System::in_offset_in_bytes() { 2992 return (InstanceMirrorKlass::offset_of_static_fields() + static_in_offset); 2993 } 2994 2995 2996 int java_lang_System::out_offset_in_bytes() { 2997 return (InstanceMirrorKlass::offset_of_static_fields() + static_out_offset); 2998 } 2999 3000 3001 int java_lang_System::err_offset_in_bytes() { 3002 return (InstanceMirrorKlass::offset_of_static_fields() + static_err_offset); 3003 } 3004 3005 3006 bool java_lang_System::has_security_manager() { 3007 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::System_klass()); 3008 address addr = ik->static_field_addr(static_security_offset); 3009 if (UseCompressedOops) { 3010 return oopDesc::load_decode_heap_oop((narrowOop *)addr) != NULL; 3011 } else { 3012 return oopDesc::load_decode_heap_oop((oop*)addr) != NULL; 3013 } 3014 } 3015 3016 int java_lang_Class::_klass_offset; 3017 int java_lang_Class::_array_klass_offset; 3018 int java_lang_Class::_oop_size_offset; 3019 int java_lang_Class::_static_oop_field_count_offset; 3020 int java_lang_Class::_protection_domain_offset; 3021 int java_lang_Class::_init_lock_offset; 3022 int java_lang_Class::_signers_offset; 3023 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL; 3024 int java_lang_Throwable::backtrace_offset; 3025 int java_lang_Throwable::detailMessage_offset; 3026 int java_lang_Throwable::cause_offset; 3027 int java_lang_Throwable::stackTrace_offset; 3028 int java_lang_Throwable::static_unassigned_stacktrace_offset; 3029 int java_lang_reflect_AccessibleObject::override_offset; 3030 int java_lang_reflect_Method::clazz_offset; 3031 int java_lang_reflect_Method::name_offset; 3032 int java_lang_reflect_Method::returnType_offset; 3033 int java_lang_reflect_Method::parameterTypes_offset; 3034 int java_lang_reflect_Method::exceptionTypes_offset; 3035 int java_lang_reflect_Method::slot_offset; 3036 int java_lang_reflect_Method::modifiers_offset; 3037 int java_lang_reflect_Method::signature_offset; 3038 int java_lang_reflect_Method::annotations_offset; 3039 int java_lang_reflect_Method::parameter_annotations_offset; 3040 int java_lang_reflect_Method::annotation_default_offset; 3041 int java_lang_reflect_Method::type_annotations_offset; 3042 int java_lang_reflect_Constructor::clazz_offset; 3043 int java_lang_reflect_Constructor::parameterTypes_offset; 3044 int java_lang_reflect_Constructor::exceptionTypes_offset; 3045 int java_lang_reflect_Constructor::slot_offset; 3046 int java_lang_reflect_Constructor::modifiers_offset; 3047 int java_lang_reflect_Constructor::signature_offset; 3048 int java_lang_reflect_Constructor::annotations_offset; 3049 int java_lang_reflect_Constructor::parameter_annotations_offset; 3050 int java_lang_reflect_Constructor::type_annotations_offset; 3051 int java_lang_reflect_Field::clazz_offset; 3052 int java_lang_reflect_Field::name_offset; 3053 int java_lang_reflect_Field::type_offset; 3054 int java_lang_reflect_Field::slot_offset; 3055 int java_lang_reflect_Field::modifiers_offset; 3056 int java_lang_reflect_Field::signature_offset; 3057 int java_lang_reflect_Field::annotations_offset; 3058 int java_lang_reflect_Field::type_annotations_offset; 3059 int java_lang_reflect_Parameter::name_offset; 3060 int java_lang_reflect_Parameter::modifiers_offset; 3061 int java_lang_reflect_Parameter::index_offset; 3062 int java_lang_reflect_Parameter::executable_offset; 3063 int java_lang_boxing_object::value_offset; 3064 int java_lang_boxing_object::long_value_offset; 3065 int java_lang_ref_Reference::referent_offset; 3066 int java_lang_ref_Reference::queue_offset; 3067 int java_lang_ref_Reference::next_offset; 3068 int java_lang_ref_Reference::discovered_offset; 3069 int java_lang_ref_Reference::static_lock_offset; 3070 int java_lang_ref_Reference::static_pending_offset; 3071 int java_lang_ref_Reference::number_of_fake_oop_fields; 3072 int java_lang_ref_SoftReference::timestamp_offset; 3073 int java_lang_ref_SoftReference::static_clock_offset; 3074 int java_lang_ClassLoader::parent_offset; 3075 int java_lang_System::static_in_offset; 3076 int java_lang_System::static_out_offset; 3077 int java_lang_System::static_err_offset; 3078 int java_lang_System::static_security_offset; 3079 int java_lang_StackTraceElement::declaringClass_offset; 3080 int java_lang_StackTraceElement::methodName_offset; 3081 int java_lang_StackTraceElement::fileName_offset; 3082 int java_lang_StackTraceElement::lineNumber_offset; 3083 int java_lang_AssertionStatusDirectives::classes_offset; 3084 int java_lang_AssertionStatusDirectives::classEnabled_offset; 3085 int java_lang_AssertionStatusDirectives::packages_offset; 3086 int java_lang_AssertionStatusDirectives::packageEnabled_offset; 3087 int java_lang_AssertionStatusDirectives::deflt_offset; 3088 int java_nio_Buffer::_limit_offset; 3089 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0; 3090 int sun_reflect_ConstantPool::_oop_offset; 3091 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset; 3092 3093 3094 // Support for java_lang_StackTraceElement 3095 3096 void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 3097 element->obj_field_put(fileName_offset, value); 3098 } 3099 3100 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 3101 element->obj_field_put(declaringClass_offset, value); 3102 } 3103 3104 void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 3105 element->obj_field_put(methodName_offset, value); 3106 } 3107 3108 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 3109 element->int_field_put(lineNumber_offset, value); 3110 } 3111 3112 3113 // Support for java Assertions - java_lang_AssertionStatusDirectives. 3114 3115 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 3116 o->obj_field_put(classes_offset, val); 3117 } 3118 3119 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 3120 o->obj_field_put(classEnabled_offset, val); 3121 } 3122 3123 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 3124 o->obj_field_put(packages_offset, val); 3125 } 3126 3127 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 3128 o->obj_field_put(packageEnabled_offset, val); 3129 } 3130 3131 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 3132 o->bool_field_put(deflt_offset, val); 3133 } 3134 3135 3136 // Support for intrinsification of java.nio.Buffer.checkIndex 3137 int java_nio_Buffer::limit_offset() { 3138 return _limit_offset; 3139 } 3140 3141 3142 void java_nio_Buffer::compute_offsets() { 3143 Klass* k = SystemDictionary::nio_Buffer_klass(); 3144 assert(k != NULL, "must be loaded in 1.4+"); 3145 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature()); 3146 } 3147 3148 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) { 3149 if (_owner_offset != 0) return; 3150 3151 assert(JDK_Version::is_gte_jdk16x_version(), "Must be JDK 1.6 or later"); 3152 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK); 3153 Klass* k = SystemDictionary::abstract_ownable_synchronizer_klass(); 3154 compute_offset(_owner_offset, k, 3155 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature()); 3156 } 3157 3158 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 3159 assert(_owner_offset != 0, "Must be initialized"); 3160 return obj->obj_field(_owner_offset); 3161 } 3162 3163 // Compute hard-coded offsets 3164 // Invoked before SystemDictionary::initialize, so pre-loaded classes 3165 // are not available to determine the offset_of_static_fields. 3166 void JavaClasses::compute_hard_coded_offsets() { 3167 const int x = heapOopSize; 3168 const int header = instanceOopDesc::base_offset_in_bytes(); 3169 3170 // Throwable Class 3171 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header; 3172 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header; 3173 java_lang_Throwable::cause_offset = java_lang_Throwable::hc_cause_offset * x + header; 3174 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header; 3175 java_lang_Throwable::static_unassigned_stacktrace_offset = java_lang_Throwable::hc_static_unassigned_stacktrace_offset * x; 3176 3177 // java_lang_boxing_object 3178 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header; 3179 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong); 3180 3181 // java_lang_ref_Reference: 3182 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header; 3183 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header; 3184 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header; 3185 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header; 3186 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x; 3187 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x; 3188 // Artificial fields for java_lang_ref_Reference 3189 // The first field is for the discovered field added in 1.4 3190 java_lang_ref_Reference::number_of_fake_oop_fields = 1; 3191 3192 // java_lang_ref_SoftReference Class 3193 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong); 3194 // Don't multiply static fields because they are always in wordSize units 3195 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x; 3196 3197 // java_lang_ClassLoader 3198 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header; 3199 3200 // java_lang_System 3201 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x; 3202 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x; 3203 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x; 3204 java_lang_System::static_security_offset = java_lang_System::hc_static_security_offset * x; 3205 3206 // java_lang_StackTraceElement 3207 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header; 3208 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header; 3209 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header; 3210 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header; 3211 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header; 3212 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header; 3213 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header; 3214 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header; 3215 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header; 3216 3217 } 3218 3219 3220 // Compute non-hard-coded field offsets of all the classes in this file 3221 void JavaClasses::compute_offsets() { 3222 // java_lang_Class::compute_offsets was called earlier in bootstrap 3223 java_lang_ClassLoader::compute_offsets(); 3224 java_lang_Thread::compute_offsets(); 3225 java_lang_ThreadGroup::compute_offsets(); 3226 if (EnableInvokeDynamic) { 3227 java_lang_invoke_MethodHandle::compute_offsets(); 3228 java_lang_invoke_DirectMethodHandle::compute_offsets(); 3229 java_lang_invoke_MemberName::compute_offsets(); 3230 java_lang_invoke_LambdaForm::compute_offsets(); 3231 java_lang_invoke_MethodType::compute_offsets(); 3232 java_lang_invoke_CallSite::compute_offsets(); 3233 } 3234 java_security_AccessControlContext::compute_offsets(); 3235 // Initialize reflection classes. The layouts of these classes 3236 // changed with the new reflection implementation in JDK 1.4, and 3237 // since the Universe doesn't know what JDK version it is until this 3238 // point we defer computation of these offsets until now. 3239 java_lang_reflect_AccessibleObject::compute_offsets(); 3240 java_lang_reflect_Method::compute_offsets(); 3241 java_lang_reflect_Constructor::compute_offsets(); 3242 java_lang_reflect_Field::compute_offsets(); 3243 if (JDK_Version::is_gte_jdk14x_version()) { 3244 java_nio_Buffer::compute_offsets(); 3245 } 3246 if (JDK_Version::is_gte_jdk15x_version()) { 3247 sun_reflect_ConstantPool::compute_offsets(); 3248 sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets(); 3249 } 3250 if (JDK_Version::is_jdk18x_version()) 3251 java_lang_reflect_Parameter::compute_offsets(); 3252 3253 // generated interpreter code wants to know about the offsets we just computed: 3254 AbstractAssembler::update_delayed_values(); 3255 } 3256 3257 #ifndef PRODUCT 3258 3259 // These functions exist to assert the validity of hard-coded field offsets to guard 3260 // against changes in the class files 3261 3262 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 3263 EXCEPTION_MARK; 3264 fieldDescriptor fd; 3265 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3266 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3267 instanceKlassHandle h_klass (THREAD, k); 3268 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3269 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3270 if (!h_klass->find_local_field(f_name, f_sig, &fd)) { 3271 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 3272 return false; 3273 } 3274 if (fd.is_static()) { 3275 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 3276 return false; 3277 } 3278 if (fd.offset() == hardcoded_offset ) { 3279 return true; 3280 } else { 3281 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.", 3282 klass_name, field_name, hardcoded_offset, fd.offset()); 3283 return false; 3284 } 3285 } 3286 3287 3288 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 3289 EXCEPTION_MARK; 3290 fieldDescriptor fd; 3291 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3292 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3293 instanceKlassHandle h_klass (THREAD, k); 3294 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3295 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3296 if (!h_klass->find_local_field(f_name, f_sig, &fd)) { 3297 tty->print_cr("Static field %s.%s not found", klass_name, field_name); 3298 return false; 3299 } 3300 if (!fd.is_static()) { 3301 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name); 3302 return false; 3303 } 3304 if (fd.offset() == hardcoded_offset + InstanceMirrorKlass::offset_of_static_fields()) { 3305 return true; 3306 } else { 3307 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()); 3308 return false; 3309 } 3310 } 3311 3312 3313 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) { 3314 EXCEPTION_MARK; 3315 fieldDescriptor fd; 3316 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3317 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3318 instanceKlassHandle h_klass (THREAD, k); 3319 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3320 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3321 if (!h_klass->find_local_field(f_name, f_sig, &fd)) { 3322 tty->print_cr("Static field %s.%s not found", klass_name, field_name); 3323 return false; 3324 } 3325 if (!fd.is_static() || !fd.has_initial_value()) { 3326 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name); 3327 return false; 3328 } 3329 if (!fd.initial_value_tag().is_int()) { 3330 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name); 3331 return false; 3332 } 3333 jint field_value = fd.int_initial_value(); 3334 if (field_value == hardcoded_constant) { 3335 return true; 3336 } else { 3337 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); 3338 return false; 3339 } 3340 } 3341 3342 3343 // Check the hard-coded field offsets of all the classes in this file 3344 3345 void JavaClasses::check_offsets() { 3346 bool valid = true; 3347 HandleMark hm; 3348 3349 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3350 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig) 3351 3352 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3353 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig) 3354 3355 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3356 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig) 3357 3358 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \ 3359 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig) 3360 3361 // java.lang.String 3362 3363 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C"); 3364 if (java_lang_String::has_offset_field()) { 3365 CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I"); 3366 CHECK_OFFSET("java/lang/String", java_lang_String, count, "I"); 3367 } 3368 if (java_lang_String::has_hash_field()) { 3369 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I"); 3370 } 3371 3372 // java.lang.Class 3373 3374 // Fake fields 3375 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked 3376 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked 3377 3378 // java.lang.Throwable 3379 3380 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;"); 3381 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;"); 3382 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;"); 3383 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;"); 3384 3385 // Boxed primitive objects (java_lang_boxing_object) 3386 3387 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 3388 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 3389 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 3390 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 3391 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 3392 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 3393 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 3394 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 3395 3396 // java.lang.ClassLoader 3397 3398 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;"); 3399 3400 // java.lang.System 3401 3402 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;"); 3403 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;"); 3404 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;"); 3405 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, security, "Ljava/lang/SecurityManager;"); 3406 3407 // java.lang.StackTraceElement 3408 3409 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;"); 3410 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;"); 3411 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;"); 3412 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I"); 3413 3414 // java.lang.ref.Reference 3415 3416 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;"); 3417 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;"); 3418 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;"); 3419 // Fake field 3420 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;"); 3421 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;"); 3422 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;"); 3423 3424 // java.lang.ref.SoftReference 3425 3426 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J"); 3427 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J"); 3428 3429 // java.lang.AssertionStatusDirectives 3430 // 3431 // The CheckAssertionStatusDirectives boolean can be removed from here and 3432 // globals.hpp after the AssertionStatusDirectives class has been integrated 3433 // into merlin "for some time." Without it, the vm will fail with early 3434 // merlin builds. 3435 3436 if (CheckAssertionStatusDirectives && JDK_Version::is_gte_jdk14x_version()) { 3437 const char* nm = "java/lang/AssertionStatusDirectives"; 3438 const char* sig = "[Ljava/lang/String;"; 3439 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig); 3440 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z"); 3441 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig); 3442 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z"); 3443 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z"); 3444 } 3445 3446 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed"); 3447 } 3448 3449 #endif // PRODUCT 3450 3451 int InjectedField::compute_offset() { 3452 Klass* klass_oop = klass(); 3453 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) { 3454 if (!may_be_java && !fs.access_flags().is_internal()) { 3455 // Only look at injected fields 3456 continue; 3457 } 3458 if (fs.name() == name() && fs.signature() == signature()) { 3459 return fs.offset(); 3460 } 3461 } 3462 ResourceMark rm; 3463 tty->print_cr("Invalid layout of %s at %s/%s%s", InstanceKlass::cast(klass_oop)->external_name(), name()->as_C_string(), signature()->as_C_string(), may_be_java ? " (may_be_java)" : ""); 3464 #ifndef PRODUCT 3465 klass_oop->print(); 3466 tty->print_cr("all fields:"); 3467 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) { 3468 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 3469 } 3470 #endif //PRODUCT 3471 fatal("Invalid layout of preloaded class"); 3472 return -1; 3473 } 3474 3475 void javaClasses_init() { 3476 JavaClasses::compute_offsets(); 3477 JavaClasses::check_offsets(); 3478 FilteredFieldsMap::initialize(); // must be done after computing offsets. 3479 }