1 /* 2 * Copyright (c) 1997, 2014, 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.inline.hpp" 28 #include "classfile/stringTable.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/objArrayOop.inline.hpp" 43 #include "oops/oop.inline.hpp" 44 #include "oops/symbol.hpp" 45 #include "oops/typeArrayOop.hpp" 46 #include "prims/jvmtiRedefineClassesTrace.hpp" 47 #include "runtime/fieldDescriptor.hpp" 48 #include "runtime/handles.inline.hpp" 49 #include "runtime/interfaceSupport.hpp" 50 #include "runtime/java.hpp" 51 #include "runtime/javaCalls.hpp" 52 #include "runtime/safepoint.hpp" 53 #include "runtime/thread.inline.hpp" 54 #include "runtime/vframe.hpp" 55 #include "utilities/preserveException.hpp" 56 57 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC 58 59 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \ 60 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum); 61 62 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \ 63 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java }, 64 65 InjectedField JavaClasses::_injected_fields[] = { 66 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD) 67 }; 68 69 int JavaClasses::compute_injected_offset(InjectedFieldID id) { 70 return _injected_fields[id].compute_offset(); 71 } 72 73 74 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) { 75 *field_count = 0; 76 77 vmSymbols::SID sid = vmSymbols::find_sid(class_name); 78 if (sid == vmSymbols::NO_SID) { 79 // Only well known classes can inject fields 80 return NULL; 81 } 82 83 int count = 0; 84 int start = -1; 85 86 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \ 87 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \ 88 count++; \ 89 if (start == -1) start = klass##_##name##_enum; \ 90 } 91 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD); 92 #undef LOOKUP_INJECTED_FIELD 93 94 if (start != -1) { 95 *field_count = count; 96 return _injected_fields + start; 97 } 98 return NULL; 99 } 100 101 102 static bool find_field(InstanceKlass* ik, 103 Symbol* name_symbol, Symbol* signature_symbol, 104 fieldDescriptor* fd, 105 bool allow_super = false) { 106 if (allow_super) 107 return ik->find_field(name_symbol, signature_symbol, fd) != NULL; 108 else 109 return ik->find_local_field(name_symbol, signature_symbol, fd); 110 } 111 112 // Helpful routine for computing field offsets at run time rather than hardcoding them 113 static void 114 compute_offset(int &dest_offset, 115 Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol, 116 bool allow_super = false) { 117 fieldDescriptor fd; 118 InstanceKlass* ik = InstanceKlass::cast(klass_oop); 119 if (!find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) { 120 ResourceMark rm; 121 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string()); 122 #ifndef PRODUCT 123 klass_oop->print(); 124 tty->print_cr("all fields:"); 125 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) { 126 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 127 } 128 #endif //PRODUCT 129 fatal("Invalid layout of preloaded class"); 130 } 131 dest_offset = fd.offset(); 132 } 133 134 // Same as above but for "optional" offsets that might not be present in certain JDK versions 135 static void 136 compute_optional_offset(int& dest_offset, 137 Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol, 138 bool allow_super = false) { 139 fieldDescriptor fd; 140 InstanceKlass* ik = InstanceKlass::cast(klass_oop); 141 if (find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) { 142 dest_offset = fd.offset(); 143 } 144 } 145 146 147 int java_lang_String::value_offset = 0; 148 int java_lang_String::offset_offset = 0; 149 int java_lang_String::count_offset = 0; 150 int java_lang_String::hash_offset = 0; 151 152 bool java_lang_String::initialized = false; 153 154 bool java_lang_String::is_instance(oop obj) { 155 return is_instance_inlined(obj); 156 } 157 158 void java_lang_String::compute_offsets() { 159 assert(!initialized, "offsets should be initialized only once"); 160 161 Klass* k = SystemDictionary::String_klass(); 162 compute_offset(value_offset, k, vmSymbols::value_name(), vmSymbols::char_array_signature()); 163 compute_optional_offset(offset_offset, k, vmSymbols::offset_name(), vmSymbols::int_signature()); 164 compute_optional_offset(count_offset, k, vmSymbols::count_name(), vmSymbols::int_signature()); 165 compute_optional_offset(hash_offset, k, vmSymbols::hash_name(), vmSymbols::int_signature()); 166 167 initialized = true; 168 } 169 170 Handle java_lang_String::basic_create(int length, TRAPS) { 171 assert(initialized, "Must be initialized"); 172 // Create the String object first, so there's a chance that the String 173 // and the char array it points to end up in the same cache line. 174 oop obj; 175 obj = InstanceKlass::cast(SystemDictionary::String_klass())->allocate_instance(CHECK_NH); 176 177 // Create the char array. The String object must be handlized here 178 // because GC can happen as a result of the allocation attempt. 179 Handle h_obj(THREAD, obj); 180 typeArrayOop buffer; 181 buffer = oopFactory::new_charArray(length, CHECK_NH); 182 183 // Point the String at the char array 184 obj = h_obj(); 185 set_value(obj, buffer); 186 // No need to zero the offset, allocation zero'ed the entire String object 187 assert(offset(obj) == 0, "initial String offset should be zero"); 188 //set_offset(obj, 0); 189 set_count(obj, length); 190 191 return h_obj; 192 } 193 194 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) { 195 Handle h_obj = basic_create(length, CHECK_NH); 196 typeArrayOop buffer = value(h_obj()); 197 for (int index = 0; index < length; index++) { 198 buffer->char_at_put(index, unicode[index]); 199 } 200 return h_obj; 201 } 202 203 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) { 204 Handle h_obj = create_from_unicode(unicode, length, CHECK_0); 205 return h_obj(); 206 } 207 208 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) { 209 if (utf8_str == NULL) { 210 return Handle(); 211 } 212 int length = UTF8::unicode_length(utf8_str); 213 Handle h_obj = basic_create(length, CHECK_NH); 214 if (length > 0) { 215 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 216 } 217 return h_obj; 218 } 219 220 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) { 221 Handle h_obj = create_from_str(utf8_str, CHECK_0); 222 return h_obj(); 223 } 224 225 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) { 226 int length = UTF8::unicode_length((char*)symbol->bytes(), symbol->utf8_length()); 227 Handle h_obj = basic_create(length, CHECK_NH); 228 if (length > 0) { 229 UTF8::convert_to_unicode((char*)symbol->bytes(), value(h_obj())->char_at_addr(0), length); 230 } 231 return h_obj; 232 } 233 234 // Converts a C string to a Java String based on current encoding 235 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) { 236 assert(str != NULL, "bad arguments"); 237 238 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *); 239 static to_java_string_fn_t _to_java_string_fn = NULL; 240 241 if (_to_java_string_fn == NULL) { 242 void *lib_handle = os::native_java_library(); 243 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform")); 244 if (_to_java_string_fn == NULL) { 245 fatal("NewStringPlatform missing"); 246 } 247 } 248 249 jstring js = NULL; 250 { JavaThread* thread = (JavaThread*)THREAD; 251 assert(thread->is_Java_thread(), "must be java thread"); 252 HandleMark hm(thread); 253 ThreadToNativeFromVM ttn(thread); 254 js = (_to_java_string_fn)(thread->jni_environment(), str); 255 } 256 return Handle(THREAD, JNIHandles::resolve(js)); 257 } 258 259 // Converts a Java String to a native C string that can be used for 260 // native OS calls. 261 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) { 262 263 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*); 264 static to_platform_string_fn_t _to_platform_string_fn = NULL; 265 266 if (_to_platform_string_fn == NULL) { 267 void *lib_handle = os::native_java_library(); 268 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars")); 269 if (_to_platform_string_fn == NULL) { 270 fatal("GetStringPlatformChars missing"); 271 } 272 } 273 274 char *native_platform_string; 275 { JavaThread* thread = (JavaThread*)THREAD; 276 assert(thread->is_Java_thread(), "must be java thread"); 277 JNIEnv *env = thread->jni_environment(); 278 jstring js = (jstring) JNIHandles::make_local(env, java_string()); 279 bool is_copy; 280 HandleMark hm(thread); 281 ThreadToNativeFromVM ttn(thread); 282 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy); 283 assert(is_copy == JNI_TRUE, "is_copy value changed"); 284 JNIHandles::destroy_local(js); 285 } 286 return native_platform_string; 287 } 288 289 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) { 290 oop obj = java_string(); 291 // Typical usage is to convert all '/' to '.' in string. 292 typeArrayOop value = java_lang_String::value(obj); 293 int offset = java_lang_String::offset(obj); 294 int length = java_lang_String::length(obj); 295 296 // First check if any from_char exist 297 int index; // Declared outside, used later 298 for (index = 0; index < length; index++) { 299 if (value->char_at(index + offset) == from_char) { 300 break; 301 } 302 } 303 if (index == length) { 304 // No from_char, so do not copy. 305 return java_string; 306 } 307 308 // Create new UNICODE buffer. Must handlize value because GC 309 // may happen during String and char array creation. 310 typeArrayHandle h_value(THREAD, value); 311 Handle string = basic_create(length, CHECK_NH); 312 313 typeArrayOop from_buffer = h_value(); 314 typeArrayOop to_buffer = java_lang_String::value(string()); 315 316 // Copy contents 317 for (index = 0; index < length; index++) { 318 jchar c = from_buffer->char_at(index + offset); 319 if (c == from_char) { 320 c = to_char; 321 } 322 to_buffer->char_at_put(index, c); 323 } 324 return string; 325 } 326 327 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) { 328 typeArrayOop value = java_lang_String::value(java_string); 329 int offset = java_lang_String::offset(java_string); 330 length = java_lang_String::length(java_string); 331 332 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length); 333 if (result != NULL) { 334 for (int index = 0; index < length; index++) { 335 result[index] = value->char_at(index + offset); 336 } 337 } else { 338 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string"); 339 } 340 return result; 341 } 342 343 unsigned int java_lang_String::hash_code(oop java_string) { 344 int length = java_lang_String::length(java_string); 345 // Zero length string will hash to zero with String.hashCode() function. 346 if (length == 0) return 0; 347 348 typeArrayOop value = java_lang_String::value(java_string); 349 int offset = java_lang_String::offset(java_string); 350 return java_lang_String::hash_code(value->char_at_addr(offset), length); 351 } 352 353 char* java_lang_String::as_quoted_ascii(oop java_string) { 354 typeArrayOop value = java_lang_String::value(java_string); 355 int offset = java_lang_String::offset(java_string); 356 int length = java_lang_String::length(java_string); 357 358 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset); 359 if (base == NULL) return NULL; 360 361 int result_length = UNICODE::quoted_ascii_length(base, length) + 1; 362 char* result = NEW_RESOURCE_ARRAY(char, result_length); 363 UNICODE::as_quoted_ascii(base, length, result, result_length); 364 assert(result_length >= length + 1, "must not be shorter"); 365 assert(result_length == (int)strlen(result) + 1, "must match"); 366 return result; 367 } 368 369 unsigned int java_lang_String::hash_string(oop java_string) { 370 int length = java_lang_String::length(java_string); 371 // Zero length string doesn't hash necessarily hash to zero. 372 if (length == 0) { 373 return StringTable::hash_string(NULL, 0); 374 } 375 376 typeArrayOop value = java_lang_String::value(java_string); 377 int offset = java_lang_String::offset(java_string); 378 return StringTable::hash_string(value->char_at_addr(offset), length); 379 } 380 381 Symbol* java_lang_String::as_symbol(Handle java_string, TRAPS) { 382 oop obj = java_string(); 383 typeArrayOop value = java_lang_String::value(obj); 384 int offset = java_lang_String::offset(obj); 385 int length = java_lang_String::length(obj); 386 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset); 387 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD); 388 return sym; 389 } 390 391 Symbol* java_lang_String::as_symbol_or_null(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* base = (length == 0) ? NULL : value->char_at_addr(offset); 396 return SymbolTable::probe_unicode(base, length); 397 } 398 399 400 int java_lang_String::utf8_length(oop java_string) { 401 typeArrayOop value = java_lang_String::value(java_string); 402 int offset = java_lang_String::offset(java_string); 403 int length = java_lang_String::length(java_string); 404 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset); 405 return UNICODE::utf8_length(position, length); 406 } 407 408 char* java_lang_String::as_utf8_string(oop java_string) { 409 typeArrayOop value = java_lang_String::value(java_string); 410 int offset = java_lang_String::offset(java_string); 411 int length = java_lang_String::length(java_string); 412 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset); 413 return UNICODE::as_utf8(position, length); 414 } 415 416 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) { 417 typeArrayOop value = java_lang_String::value(java_string); 418 int offset = java_lang_String::offset(java_string); 419 int length = java_lang_String::length(java_string); 420 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset); 421 return UNICODE::as_utf8(position, length, buf, buflen); 422 } 423 424 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) { 425 typeArrayOop value = java_lang_String::value(java_string); 426 int offset = java_lang_String::offset(java_string); 427 int length = java_lang_String::length(java_string); 428 assert(start + len <= length, "just checking"); 429 jchar* position = value->char_at_addr(offset + start); 430 return UNICODE::as_utf8(position, len); 431 } 432 433 char* java_lang_String::as_utf8_string(oop java_string, int start, int len, char* buf, int buflen) { 434 typeArrayOop value = java_lang_String::value(java_string); 435 int offset = java_lang_String::offset(java_string); 436 int length = java_lang_String::length(java_string); 437 assert(start + len <= length, "just checking"); 438 jchar* position = value->char_at_addr(offset + start); 439 return UNICODE::as_utf8(position, len, buf, buflen); 440 } 441 442 bool java_lang_String::equals(oop java_string, jchar* chars, int len) { 443 assert(java_string->klass() == SystemDictionary::String_klass(), 444 "must be java_string"); 445 typeArrayOop value = java_lang_String::value(java_string); 446 int offset = java_lang_String::offset(java_string); 447 int length = java_lang_String::length(java_string); 448 if (length != len) { 449 return false; 450 } 451 for (int i = 0; i < len; i++) { 452 if (value->char_at(i + offset) != chars[i]) { 453 return false; 454 } 455 } 456 return true; 457 } 458 459 bool java_lang_String::equals(oop str1, oop str2) { 460 assert(str1->klass() == SystemDictionary::String_klass(), 461 "must be java String"); 462 assert(str2->klass() == SystemDictionary::String_klass(), 463 "must be java String"); 464 typeArrayOop value1 = java_lang_String::value(str1); 465 int offset1 = java_lang_String::offset(str1); 466 int length1 = java_lang_String::length(str1); 467 typeArrayOop value2 = java_lang_String::value(str2); 468 int offset2 = java_lang_String::offset(str2); 469 int length2 = java_lang_String::length(str2); 470 471 if (length1 != length2) { 472 return false; 473 } 474 for (int i = 0; i < length1; i++) { 475 if (value1->char_at(i + offset1) != value2->char_at(i + offset2)) { 476 return false; 477 } 478 } 479 return true; 480 } 481 482 void java_lang_String::print(oop java_string, outputStream* st) { 483 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string"); 484 typeArrayOop value = java_lang_String::value(java_string); 485 486 if (value == NULL) { 487 // This can happen if, e.g., printing a String 488 // object before its initializer has been called 489 st->print("NULL"); 490 return; 491 } 492 493 int offset = java_lang_String::offset(java_string); 494 int length = java_lang_String::length(java_string); 495 496 st->print("\""); 497 for (int index = 0; index < length; index++) { 498 st->print("%c", value->char_at(index + offset)); 499 } 500 st->print("\""); 501 } 502 503 504 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 505 assert(mirror.not_null() && fd->is_static(), "just checking"); 506 if (fd->has_initial_value()) { 507 BasicType t = fd->field_type(); 508 switch (t) { 509 case T_BYTE: 510 mirror()->byte_field_put(fd->offset(), fd->int_initial_value()); 511 break; 512 case T_BOOLEAN: 513 mirror()->bool_field_put(fd->offset(), fd->int_initial_value()); 514 break; 515 case T_CHAR: 516 mirror()->char_field_put(fd->offset(), fd->int_initial_value()); 517 break; 518 case T_SHORT: 519 mirror()->short_field_put(fd->offset(), fd->int_initial_value()); 520 break; 521 case T_INT: 522 mirror()->int_field_put(fd->offset(), fd->int_initial_value()); 523 break; 524 case T_FLOAT: 525 mirror()->float_field_put(fd->offset(), fd->float_initial_value()); 526 break; 527 case T_DOUBLE: 528 mirror()->double_field_put(fd->offset(), fd->double_initial_value()); 529 break; 530 case T_LONG: 531 mirror()->long_field_put(fd->offset(), fd->long_initial_value()); 532 break; 533 case T_OBJECT: 534 { 535 #ifdef ASSERT 536 TempNewSymbol sym = SymbolTable::new_symbol("Ljava/lang/String;", CHECK); 537 assert(fd->signature() == sym, "just checking"); 538 #endif 539 oop string = fd->string_initial_value(CHECK); 540 mirror()->obj_field_put(fd->offset(), string); 541 } 542 break; 543 default: 544 THROW_MSG(vmSymbols::java_lang_ClassFormatError(), 545 "Illegal ConstantValue attribute in class file"); 546 } 547 } 548 } 549 550 551 void java_lang_Class::fixup_mirror(KlassHandle k, TRAPS) { 552 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already"); 553 554 // If the offset was read from the shared archive, it was fixed up already 555 if (!k->is_shared()) { 556 if (k->oop_is_instance()) { 557 // During bootstrap, java.lang.Class wasn't loaded so static field 558 // offsets were computed without the size added it. Go back and 559 // update all the static field offsets to included the size. 560 for (JavaFieldStream fs(InstanceKlass::cast(k())); !fs.done(); fs.next()) { 561 if (fs.access_flags().is_static()) { 562 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields(); 563 fs.set_offset(real_offset); 564 } 565 } 566 } 567 } 568 create_mirror(k, Handle(NULL), Handle(NULL), CHECK); 569 } 570 571 void java_lang_Class::initialize_mirror_fields(KlassHandle k, 572 Handle mirror, 573 Handle protection_domain, 574 TRAPS) { 575 // Allocate a simple java object for a lock. 576 // This needs to be a java object because during class initialization 577 // it can be held across a java call. 578 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK); 579 set_init_lock(mirror(), r); 580 581 // Set protection domain also 582 set_protection_domain(mirror(), protection_domain()); 583 584 // Initialize static fields 585 InstanceKlass::cast(k())->do_local_static_fields(&initialize_static_field, mirror, CHECK); 586 } 587 588 void java_lang_Class::create_mirror(KlassHandle k, Handle class_loader, 589 Handle protection_domain, TRAPS) { 590 assert(k->java_mirror() == NULL, "should only assign mirror once"); 591 // Use this moment of initialization to cache modifier_flags also, 592 // to support Class.getModifiers(). Instance classes recalculate 593 // the cached flags after the class file is parsed, but before the 594 // class is put into the system dictionary. 595 int computed_modifiers = k->compute_modifier_flags(CHECK); 596 k->set_modifier_flags(computed_modifiers); 597 // Class_klass has to be loaded because it is used to allocate 598 // the mirror. 599 if (SystemDictionary::Class_klass_loaded()) { 600 // Allocate mirror (java.lang.Class instance) 601 Handle mirror = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK); 602 603 // Setup indirection from mirror->klass 604 if (!k.is_null()) { 605 java_lang_Class::set_klass(mirror(), k()); 606 } 607 608 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass()); 609 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set"); 610 611 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror())); 612 613 // It might also have a component mirror. This mirror must already exist. 614 if (k->oop_is_array()) { 615 Handle comp_mirror; 616 if (k->oop_is_typeArray()) { 617 BasicType type = TypeArrayKlass::cast(k())->element_type(); 618 comp_mirror = Universe::java_mirror(type); 619 } else { 620 assert(k->oop_is_objArray(), "Must be"); 621 Klass* element_klass = ObjArrayKlass::cast(k())->element_klass(); 622 assert(element_klass != NULL, "Must have an element klass"); 623 comp_mirror = element_klass->java_mirror(); 624 } 625 assert(comp_mirror.not_null(), "must have a mirror"); 626 627 // Two-way link between the array klass and its component mirror: 628 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k 629 set_component_mirror(mirror(), comp_mirror()); 630 set_array_klass(comp_mirror(), k()); 631 } else { 632 assert(k->oop_is_instance(), "Must be"); 633 634 initialize_mirror_fields(k, mirror, protection_domain, THREAD); 635 if (HAS_PENDING_EXCEPTION) { 636 // If any of the fields throws an exception like OOM remove the klass field 637 // from the mirror so GC doesn't follow it after the klass has been deallocated. 638 // This mirror looks like a primitive type, which logically it is because it 639 // it represents no class. 640 java_lang_Class::set_klass(mirror(), NULL); 641 return; 642 } 643 } 644 645 // set the classLoader field in the java_lang_Class instance 646 assert(class_loader() == k->class_loader(), "should be same"); 647 set_class_loader(mirror(), class_loader()); 648 649 // Setup indirection from klass->mirror last 650 // after any exceptions can happen during allocations. 651 if (!k.is_null()) { 652 k->set_java_mirror(mirror()); 653 } 654 } else { 655 if (fixup_mirror_list() == NULL) { 656 GrowableArray<Klass*>* list = 657 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true); 658 set_fixup_mirror_list(list); 659 } 660 fixup_mirror_list()->push(k()); 661 } 662 } 663 664 665 int java_lang_Class::oop_size(oop java_class) { 666 assert(_oop_size_offset != 0, "must be set"); 667 return java_class->int_field(_oop_size_offset); 668 } 669 void java_lang_Class::set_oop_size(oop java_class, int size) { 670 assert(_oop_size_offset != 0, "must be set"); 671 java_class->int_field_put(_oop_size_offset, size); 672 } 673 int java_lang_Class::static_oop_field_count(oop java_class) { 674 assert(_static_oop_field_count_offset != 0, "must be set"); 675 return java_class->int_field(_static_oop_field_count_offset); 676 } 677 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) { 678 assert(_static_oop_field_count_offset != 0, "must be set"); 679 java_class->int_field_put(_static_oop_field_count_offset, size); 680 } 681 682 oop java_lang_Class::protection_domain(oop java_class) { 683 assert(_protection_domain_offset != 0, "must be set"); 684 return java_class->obj_field(_protection_domain_offset); 685 } 686 void java_lang_Class::set_protection_domain(oop java_class, oop pd) { 687 assert(_protection_domain_offset != 0, "must be set"); 688 java_class->obj_field_put(_protection_domain_offset, pd); 689 } 690 691 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) { 692 assert(_component_mirror_offset != 0, "must be set"); 693 java_class->obj_field_put(_component_mirror_offset, comp_mirror); 694 } 695 oop java_lang_Class::component_mirror(oop java_class) { 696 assert(_component_mirror_offset != 0, "must be set"); 697 return java_class->obj_field(_component_mirror_offset); 698 } 699 700 oop java_lang_Class::init_lock(oop java_class) { 701 assert(_init_lock_offset != 0, "must be set"); 702 return java_class->obj_field(_init_lock_offset); 703 } 704 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) { 705 assert(_init_lock_offset != 0, "must be set"); 706 java_class->obj_field_put(_init_lock_offset, init_lock); 707 } 708 709 objArrayOop java_lang_Class::signers(oop java_class) { 710 assert(_signers_offset != 0, "must be set"); 711 return (objArrayOop)java_class->obj_field(_signers_offset); 712 } 713 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) { 714 assert(_signers_offset != 0, "must be set"); 715 java_class->obj_field_put(_signers_offset, (oop)signers); 716 } 717 718 719 void java_lang_Class::set_class_loader(oop java_class, oop loader) { 720 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet. 721 if (_class_loader_offset != 0) { 722 java_class->obj_field_put(_class_loader_offset, loader); 723 } 724 } 725 726 oop java_lang_Class::class_loader(oop java_class) { 727 assert(_class_loader_offset != 0, "must be set"); 728 return java_class->obj_field(_class_loader_offset); 729 } 730 731 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) { 732 // This should be improved by adding a field at the Java level or by 733 // introducing a new VM klass (see comment in ClassFileParser) 734 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0); 735 if (type != T_VOID) { 736 Klass* aklass = Universe::typeArrayKlassObj(type); 737 assert(aklass != NULL, "correct bootstrap"); 738 set_array_klass(java_class, aklass); 739 } 740 #ifdef ASSERT 741 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass()); 742 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation"); 743 #endif 744 return java_class; 745 } 746 747 748 Klass* java_lang_Class::as_Klass(oop java_class) { 749 //%note memory_2 750 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 751 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset)); 752 assert(k == NULL || k->is_klass(), "type check"); 753 return k; 754 } 755 756 757 void java_lang_Class::set_klass(oop java_class, Klass* klass) { 758 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 759 java_class->metadata_field_put(_klass_offset, klass); 760 } 761 762 763 void java_lang_Class::print_signature(oop java_class, outputStream* st) { 764 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 765 Symbol* name = NULL; 766 bool is_instance = false; 767 if (is_primitive(java_class)) { 768 name = vmSymbols::type_signature(primitive_type(java_class)); 769 } else { 770 Klass* k = as_Klass(java_class); 771 is_instance = k->oop_is_instance(); 772 name = k->name(); 773 } 774 if (name == NULL) { 775 st->print("<null>"); 776 return; 777 } 778 if (is_instance) st->print("L"); 779 st->write((char*) name->base(), (int) name->utf8_length()); 780 if (is_instance) st->print(";"); 781 } 782 783 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) { 784 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 785 Symbol* name; 786 if (is_primitive(java_class)) { 787 name = vmSymbols::type_signature(primitive_type(java_class)); 788 // Because this can create a new symbol, the caller has to decrement 789 // the refcount, so make adjustment here and below for symbols returned 790 // that are not created or incremented due to a successful lookup. 791 name->increment_refcount(); 792 } else { 793 Klass* k = as_Klass(java_class); 794 if (!k->oop_is_instance()) { 795 name = k->name(); 796 name->increment_refcount(); 797 } else { 798 ResourceMark rm; 799 const char* sigstr = k->signature_name(); 800 int siglen = (int) strlen(sigstr); 801 if (!intern_if_not_found) { 802 name = SymbolTable::probe(sigstr, siglen); 803 } else { 804 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 805 } 806 } 807 } 808 return name; 809 } 810 811 812 Klass* java_lang_Class::array_klass(oop java_class) { 813 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset)); 814 assert(k == NULL || k->is_klass() && k->oop_is_array(), "should be array klass"); 815 return k; 816 } 817 818 819 void java_lang_Class::set_array_klass(oop java_class, Klass* klass) { 820 assert(klass->is_klass() && klass->oop_is_array(), "should be array klass"); 821 java_class->metadata_field_put(_array_klass_offset, klass); 822 } 823 824 825 bool java_lang_Class::is_primitive(oop java_class) { 826 // should assert: 827 //assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 828 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL); 829 830 #ifdef ASSERT 831 if (is_primitive) { 832 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset)); 833 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()), 834 "Should be either the T_VOID primitive or a java primitive"); 835 } 836 #endif 837 838 return is_primitive; 839 } 840 841 842 BasicType java_lang_Class::primitive_type(oop java_class) { 843 assert(java_lang_Class::is_primitive(java_class), "just checking"); 844 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset)); 845 BasicType type = T_VOID; 846 if (ak != NULL) { 847 // Note: create_basic_type_mirror above initializes ak to a non-null value. 848 type = ArrayKlass::cast(ak)->element_type(); 849 } else { 850 assert(java_class == Universe::void_mirror(), "only valid non-array primitive"); 851 } 852 assert(Universe::java_mirror(type) == java_class, "must be consistent"); 853 return type; 854 } 855 856 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) { 857 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 858 if (is_primitive(java_class)) { 859 if (reference_klass != NULL) 860 (*reference_klass) = NULL; 861 return primitive_type(java_class); 862 } else { 863 if (reference_klass != NULL) 864 (*reference_klass) = as_Klass(java_class); 865 return T_OBJECT; 866 } 867 } 868 869 870 oop java_lang_Class::primitive_mirror(BasicType t) { 871 oop mirror = Universe::java_mirror(t); 872 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class"); 873 assert(java_lang_Class::is_primitive(mirror), "must be primitive"); 874 return mirror; 875 } 876 877 bool java_lang_Class::offsets_computed = false; 878 int java_lang_Class::classRedefinedCount_offset = -1; 879 880 void java_lang_Class::compute_offsets() { 881 assert(!offsets_computed, "offsets should be initialized only once"); 882 offsets_computed = true; 883 884 Klass* k = SystemDictionary::Class_klass(); 885 // The classRedefinedCount field is only present starting in 1.5, 886 // so don't go fatal. 887 compute_optional_offset(classRedefinedCount_offset, 888 k, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature()); 889 890 // Needs to be optional because the old build runs Queens during bootstrapping 891 // and jdk8-9 doesn't have coordinated pushes yet. 892 compute_optional_offset(_class_loader_offset, 893 k, vmSymbols::classLoader_name(), 894 vmSymbols::classloader_signature()); 895 896 compute_offset(_component_mirror_offset, 897 k, vmSymbols::componentType_name(), 898 vmSymbols::class_signature()); 899 900 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have 901 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops 902 // GC treats them the same. 903 _init_lock_offset = _component_mirror_offset; 904 905 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 906 } 907 908 int java_lang_Class::classRedefinedCount(oop the_class_mirror) { 909 if (classRedefinedCount_offset == -1) { 910 // If we don't have an offset for it then just return -1 as a marker. 911 return -1; 912 } 913 914 return the_class_mirror->int_field(classRedefinedCount_offset); 915 } 916 917 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) { 918 if (classRedefinedCount_offset == -1) { 919 // If we don't have an offset for it then nothing to set. 920 return; 921 } 922 923 the_class_mirror->int_field_put(classRedefinedCount_offset, value); 924 } 925 926 927 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the 928 // platform thread structure, and a eetop offset which was used for thread 929 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures 930 // merged, so in the HotSpot VM we just use the eetop field for the thread 931 // instead of the privateInfo_offset. 932 // 933 // Note: The stackSize field is only present starting in 1.4. 934 935 int java_lang_Thread::_name_offset = 0; 936 int java_lang_Thread::_group_offset = 0; 937 int java_lang_Thread::_contextClassLoader_offset = 0; 938 int java_lang_Thread::_inheritedAccessControlContext_offset = 0; 939 int java_lang_Thread::_priority_offset = 0; 940 int java_lang_Thread::_eetop_offset = 0; 941 int java_lang_Thread::_daemon_offset = 0; 942 int java_lang_Thread::_stillborn_offset = 0; 943 int java_lang_Thread::_stackSize_offset = 0; 944 int java_lang_Thread::_tid_offset = 0; 945 int java_lang_Thread::_thread_status_offset = 0; 946 int java_lang_Thread::_park_blocker_offset = 0; 947 int java_lang_Thread::_park_event_offset = 0 ; 948 949 950 void java_lang_Thread::compute_offsets() { 951 assert(_group_offset == 0, "offsets should be initialized only once"); 952 953 Klass* k = SystemDictionary::Thread_klass(); 954 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 955 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature()); 956 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature()); 957 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature()); 958 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature()); 959 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature()); 960 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature()); 961 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature()); 962 // The stackSize field is only present starting in 1.4, so don't go fatal. 963 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature()); 964 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal. 965 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature()); 966 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature()); 967 // The parkBlocker field is only present starting in 1.6, so don't go fatal. 968 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature()); 969 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(), 970 vmSymbols::long_signature()); 971 } 972 973 974 JavaThread* java_lang_Thread::thread(oop java_thread) { 975 return (JavaThread*)java_thread->address_field(_eetop_offset); 976 } 977 978 979 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) { 980 java_thread->address_field_put(_eetop_offset, (address)thread); 981 } 982 983 984 oop java_lang_Thread::name(oop java_thread) { 985 return java_thread->obj_field(_name_offset); 986 } 987 988 989 void java_lang_Thread::set_name(oop java_thread, oop name) { 990 java_thread->obj_field_put(_name_offset, name); 991 } 992 993 994 ThreadPriority java_lang_Thread::priority(oop java_thread) { 995 return (ThreadPriority)java_thread->int_field(_priority_offset); 996 } 997 998 999 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) { 1000 java_thread->int_field_put(_priority_offset, priority); 1001 } 1002 1003 1004 oop java_lang_Thread::threadGroup(oop java_thread) { 1005 return java_thread->obj_field(_group_offset); 1006 } 1007 1008 1009 bool java_lang_Thread::is_stillborn(oop java_thread) { 1010 return java_thread->bool_field(_stillborn_offset) != 0; 1011 } 1012 1013 1014 // We never have reason to turn the stillborn bit off 1015 void java_lang_Thread::set_stillborn(oop java_thread) { 1016 java_thread->bool_field_put(_stillborn_offset, true); 1017 } 1018 1019 1020 bool java_lang_Thread::is_alive(oop java_thread) { 1021 JavaThread* thr = java_lang_Thread::thread(java_thread); 1022 return (thr != NULL); 1023 } 1024 1025 1026 bool java_lang_Thread::is_daemon(oop java_thread) { 1027 return java_thread->bool_field(_daemon_offset) != 0; 1028 } 1029 1030 1031 void java_lang_Thread::set_daemon(oop java_thread) { 1032 java_thread->bool_field_put(_daemon_offset, true); 1033 } 1034 1035 oop java_lang_Thread::context_class_loader(oop java_thread) { 1036 return java_thread->obj_field(_contextClassLoader_offset); 1037 } 1038 1039 oop java_lang_Thread::inherited_access_control_context(oop java_thread) { 1040 return java_thread->obj_field(_inheritedAccessControlContext_offset); 1041 } 1042 1043 1044 jlong java_lang_Thread::stackSize(oop java_thread) { 1045 if (_stackSize_offset > 0) { 1046 return java_thread->long_field(_stackSize_offset); 1047 } else { 1048 return 0; 1049 } 1050 } 1051 1052 // Write the thread status value to threadStatus field in java.lang.Thread java class. 1053 void java_lang_Thread::set_thread_status(oop java_thread, 1054 java_lang_Thread::ThreadStatus status) { 1055 // The threadStatus is only present starting in 1.5 1056 if (_thread_status_offset > 0) { 1057 java_thread->int_field_put(_thread_status_offset, status); 1058 } 1059 } 1060 1061 // Read thread status value from threadStatus field in java.lang.Thread java class. 1062 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) { 1063 assert(Thread::current()->is_Watcher_thread() || Thread::current()->is_VM_thread() || 1064 JavaThread::current()->thread_state() == _thread_in_vm, 1065 "Java Thread is not running in vm"); 1066 // The threadStatus is only present starting in 1.5 1067 if (_thread_status_offset > 0) { 1068 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1069 } else { 1070 // All we can easily figure out is if it is alive, but that is 1071 // enough info for a valid unknown status. 1072 // These aren't restricted to valid set ThreadStatus values, so 1073 // use JVMTI values and cast. 1074 JavaThread* thr = java_lang_Thread::thread(java_thread); 1075 if (thr == NULL) { 1076 // the thread hasn't run yet or is in the process of exiting 1077 return NEW; 1078 } 1079 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE; 1080 } 1081 } 1082 1083 1084 jlong java_lang_Thread::thread_id(oop java_thread) { 1085 // The thread ID field is only present starting in 1.5 1086 if (_tid_offset > 0) { 1087 return java_thread->long_field(_tid_offset); 1088 } else { 1089 return 0; 1090 } 1091 } 1092 1093 oop java_lang_Thread::park_blocker(oop java_thread) { 1094 assert(JDK_Version::current().supports_thread_park_blocker() && 1095 _park_blocker_offset != 0, "Must support parkBlocker field"); 1096 1097 if (_park_blocker_offset > 0) { 1098 return java_thread->obj_field(_park_blocker_offset); 1099 } 1100 1101 return NULL; 1102 } 1103 1104 jlong java_lang_Thread::park_event(oop java_thread) { 1105 if (_park_event_offset > 0) { 1106 return java_thread->long_field(_park_event_offset); 1107 } 1108 return 0; 1109 } 1110 1111 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) { 1112 if (_park_event_offset > 0) { 1113 java_thread->long_field_put(_park_event_offset, ptr); 1114 return true; 1115 } 1116 return false; 1117 } 1118 1119 1120 const char* java_lang_Thread::thread_status_name(oop java_thread) { 1121 assert(_thread_status_offset != 0, "Must have thread status"); 1122 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1123 switch (status) { 1124 case NEW : return "NEW"; 1125 case RUNNABLE : return "RUNNABLE"; 1126 case SLEEPING : return "TIMED_WAITING (sleeping)"; 1127 case IN_OBJECT_WAIT : return "WAITING (on object monitor)"; 1128 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)"; 1129 case PARKED : return "WAITING (parking)"; 1130 case PARKED_TIMED : return "TIMED_WAITING (parking)"; 1131 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)"; 1132 case TERMINATED : return "TERMINATED"; 1133 default : return "UNKNOWN"; 1134 }; 1135 } 1136 int java_lang_ThreadGroup::_parent_offset = 0; 1137 int java_lang_ThreadGroup::_name_offset = 0; 1138 int java_lang_ThreadGroup::_threads_offset = 0; 1139 int java_lang_ThreadGroup::_groups_offset = 0; 1140 int java_lang_ThreadGroup::_maxPriority_offset = 0; 1141 int java_lang_ThreadGroup::_destroyed_offset = 0; 1142 int java_lang_ThreadGroup::_daemon_offset = 0; 1143 int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0; 1144 int java_lang_ThreadGroup::_nthreads_offset = 0; 1145 int java_lang_ThreadGroup::_ngroups_offset = 0; 1146 1147 oop java_lang_ThreadGroup::parent(oop java_thread_group) { 1148 assert(java_thread_group->is_oop(), "thread group must be oop"); 1149 return java_thread_group->obj_field(_parent_offset); 1150 } 1151 1152 // ("name as oop" accessor is not necessary) 1153 1154 typeArrayOop java_lang_ThreadGroup::name(oop java_thread_group) { 1155 oop name = java_thread_group->obj_field(_name_offset); 1156 // ThreadGroup.name can be null 1157 return name == NULL ? (typeArrayOop)NULL : java_lang_String::value(name); 1158 } 1159 1160 int java_lang_ThreadGroup::nthreads(oop java_thread_group) { 1161 assert(java_thread_group->is_oop(), "thread group must be oop"); 1162 return java_thread_group->int_field(_nthreads_offset); 1163 } 1164 1165 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) { 1166 oop threads = java_thread_group->obj_field(_threads_offset); 1167 assert(threads != NULL, "threadgroups should have threads"); 1168 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code 1169 return objArrayOop(threads); 1170 } 1171 1172 int java_lang_ThreadGroup::ngroups(oop java_thread_group) { 1173 assert(java_thread_group->is_oop(), "thread group must be oop"); 1174 return java_thread_group->int_field(_ngroups_offset); 1175 } 1176 1177 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) { 1178 oop groups = java_thread_group->obj_field(_groups_offset); 1179 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code 1180 return objArrayOop(groups); 1181 } 1182 1183 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) { 1184 assert(java_thread_group->is_oop(), "thread group must be oop"); 1185 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset); 1186 } 1187 1188 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) { 1189 assert(java_thread_group->is_oop(), "thread group must be oop"); 1190 return java_thread_group->bool_field(_destroyed_offset) != 0; 1191 } 1192 1193 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) { 1194 assert(java_thread_group->is_oop(), "thread group must be oop"); 1195 return java_thread_group->bool_field(_daemon_offset) != 0; 1196 } 1197 1198 bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) { 1199 assert(java_thread_group->is_oop(), "thread group must be oop"); 1200 return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0; 1201 } 1202 1203 void java_lang_ThreadGroup::compute_offsets() { 1204 assert(_parent_offset == 0, "offsets should be initialized only once"); 1205 1206 Klass* k = SystemDictionary::ThreadGroup_klass(); 1207 1208 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature()); 1209 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1210 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature()); 1211 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature()); 1212 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature()); 1213 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature()); 1214 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature()); 1215 compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature()); 1216 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature()); 1217 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature()); 1218 } 1219 1220 oop java_lang_Throwable::unassigned_stacktrace() { 1221 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Throwable_klass()); 1222 address addr = ik->static_field_addr(static_unassigned_stacktrace_offset); 1223 if (UseCompressedOops) { 1224 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 1225 } else { 1226 return oopDesc::load_decode_heap_oop((oop*)addr); 1227 } 1228 } 1229 1230 oop java_lang_Throwable::backtrace(oop throwable) { 1231 return throwable->obj_field_acquire(backtrace_offset); 1232 } 1233 1234 1235 void java_lang_Throwable::set_backtrace(oop throwable, oop value) { 1236 throwable->release_obj_field_put(backtrace_offset, value); 1237 } 1238 1239 1240 oop java_lang_Throwable::message(oop throwable) { 1241 return throwable->obj_field(detailMessage_offset); 1242 } 1243 1244 1245 oop java_lang_Throwable::message(Handle throwable) { 1246 return throwable->obj_field(detailMessage_offset); 1247 } 1248 1249 1250 // Return Symbol for detailed_message or NULL 1251 Symbol* java_lang_Throwable::detail_message(oop throwable) { 1252 PRESERVE_EXCEPTION_MARK; // Keep original exception 1253 oop detailed_message = java_lang_Throwable::message(throwable); 1254 if (detailed_message != NULL) { 1255 return java_lang_String::as_symbol(detailed_message, THREAD); 1256 } 1257 return NULL; 1258 } 1259 1260 void java_lang_Throwable::set_message(oop throwable, oop value) { 1261 throwable->obj_field_put(detailMessage_offset, value); 1262 } 1263 1264 1265 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) { 1266 throwable->obj_field_put(stackTrace_offset, st_element_array); 1267 } 1268 1269 void java_lang_Throwable::clear_stacktrace(oop throwable) { 1270 set_stacktrace(throwable, NULL); 1271 } 1272 1273 1274 void java_lang_Throwable::print(oop throwable, outputStream* st) { 1275 ResourceMark rm; 1276 Klass* k = throwable->klass(); 1277 assert(k != NULL, "just checking"); 1278 st->print("%s", InstanceKlass::cast(k)->external_name()); 1279 oop msg = message(throwable); 1280 if (msg != NULL) { 1281 st->print(": %s", java_lang_String::as_utf8_string(msg)); 1282 } 1283 } 1284 1285 1286 void java_lang_Throwable::print(Handle throwable, outputStream* st) { 1287 ResourceMark rm; 1288 Klass* k = throwable->klass(); 1289 assert(k != NULL, "just checking"); 1290 st->print("%s", InstanceKlass::cast(k)->external_name()); 1291 oop msg = message(throwable); 1292 if (msg != NULL) { 1293 st->print(": %s", java_lang_String::as_utf8_string(msg)); 1294 } 1295 } 1296 1297 // After this many redefines, the stack trace is unreliable. 1298 const int MAX_VERSION = USHRT_MAX; 1299 1300 // Helper backtrace functions to store bci|version together. 1301 static inline int merge_bci_and_version(int bci, int version) { 1302 // only store u2 for version, checking for overflow. 1303 if (version > USHRT_MAX || version < 0) version = MAX_VERSION; 1304 assert((jushort)bci == bci, "bci should be short"); 1305 return build_int_from_shorts(version, bci); 1306 } 1307 1308 static inline int bci_at(unsigned int merged) { 1309 return extract_high_short_from_int(merged); 1310 } 1311 static inline int version_at(unsigned int merged) { 1312 return extract_low_short_from_int(merged); 1313 } 1314 1315 static inline bool version_matches(Method* method, int version) { 1316 return (method->constants()->version() == version && version < MAX_VERSION); 1317 } 1318 1319 static inline int get_line_number(Method* method, int bci) { 1320 int line_number = 0; 1321 if (method->is_native()) { 1322 // Negative value different from -1 below, enabling Java code in 1323 // class java.lang.StackTraceElement to distinguish "native" from 1324 // "no LineNumberTable". JDK tests for -2. 1325 line_number = -2; 1326 } else { 1327 // Returns -1 if no LineNumberTable, and otherwise actual line number 1328 line_number = method->line_number_from_bci(bci); 1329 if (line_number == -1 && ShowHiddenFrames) { 1330 line_number = bci + 1000000; 1331 } 1332 } 1333 return line_number; 1334 } 1335 1336 // This class provides a simple wrapper over the internal structure of 1337 // exception backtrace to insulate users of the backtrace from needing 1338 // to know what it looks like. 1339 class BacktraceBuilder: public StackObj { 1340 private: 1341 Handle _backtrace; 1342 objArrayOop _head; 1343 typeArrayOop _methods; 1344 typeArrayOop _bcis; 1345 objArrayOop _mirrors; 1346 int _index; 1347 No_Safepoint_Verifier _nsv; 1348 1349 public: 1350 1351 enum { 1352 trace_methods_offset = java_lang_Throwable::trace_methods_offset, 1353 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset, 1354 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset, 1355 trace_next_offset = java_lang_Throwable::trace_next_offset, 1356 trace_size = java_lang_Throwable::trace_size, 1357 trace_chunk_size = java_lang_Throwable::trace_chunk_size 1358 }; 1359 1360 // get info out of chunks 1361 static typeArrayOop get_methods(objArrayHandle chunk) { 1362 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset)); 1363 assert(methods != NULL, "method array should be initialized in backtrace"); 1364 return methods; 1365 } 1366 static typeArrayOop get_bcis(objArrayHandle chunk) { 1367 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 1368 assert(bcis != NULL, "bci array should be initialized in backtrace"); 1369 return bcis; 1370 } 1371 static objArrayOop get_mirrors(objArrayHandle chunk) { 1372 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset)); 1373 assert(mirrors != NULL, "mirror array should be initialized in backtrace"); 1374 return mirrors; 1375 } 1376 1377 // constructor for new backtrace 1378 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL) { 1379 expand(CHECK); 1380 _backtrace = _head; 1381 _index = 0; 1382 } 1383 1384 BacktraceBuilder(objArrayHandle backtrace) { 1385 _methods = get_methods(backtrace); 1386 _bcis = get_bcis(backtrace); 1387 _mirrors = get_mirrors(backtrace); 1388 assert(_methods->length() == _bcis->length() && 1389 _methods->length() == _mirrors->length(), 1390 "method and source information arrays should match"); 1391 1392 // head is the preallocated backtrace 1393 _backtrace = _head = backtrace(); 1394 _index = 0; 1395 } 1396 1397 void expand(TRAPS) { 1398 objArrayHandle old_head(THREAD, _head); 1399 Pause_No_Safepoint_Verifier pnsv(&_nsv); 1400 1401 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK); 1402 objArrayHandle new_head(THREAD, head); 1403 1404 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK); 1405 typeArrayHandle new_methods(THREAD, methods); 1406 1407 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK); 1408 typeArrayHandle new_bcis(THREAD, bcis); 1409 1410 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK); 1411 objArrayHandle new_mirrors(THREAD, mirrors); 1412 1413 if (!old_head.is_null()) { 1414 old_head->obj_at_put(trace_next_offset, new_head()); 1415 } 1416 new_head->obj_at_put(trace_methods_offset, new_methods()); 1417 new_head->obj_at_put(trace_bcis_offset, new_bcis()); 1418 new_head->obj_at_put(trace_mirrors_offset, new_mirrors()); 1419 1420 _head = new_head(); 1421 _methods = new_methods(); 1422 _bcis = new_bcis(); 1423 _mirrors = new_mirrors(); 1424 _index = 0; 1425 } 1426 1427 oop backtrace() { 1428 return _backtrace(); 1429 } 1430 1431 inline void push(Method* method, int bci, TRAPS) { 1432 // Smear the -1 bci to 0 since the array only holds unsigned 1433 // shorts. The later line number lookup would just smear the -1 1434 // to a 0 even if it could be recorded. 1435 if (bci == SynchronizationEntryBCI) bci = 0; 1436 1437 if (_index >= trace_chunk_size) { 1438 methodHandle mhandle(THREAD, method); 1439 expand(CHECK); 1440 method = mhandle(); 1441 } 1442 1443 _methods->short_at_put(_index, method->method_idnum()); 1444 _bcis->int_at_put(_index, merge_bci_and_version(bci, method->constants()->version())); 1445 1446 // We need to save the mirrors in the backtrace to keep the class 1447 // from being unloaded while we still have this stack trace. 1448 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror"); 1449 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror()); 1450 _index++; 1451 } 1452 1453 }; 1454 1455 // Print stack trace element to resource allocated buffer 1456 char* java_lang_Throwable::print_stack_element_to_buffer(Handle mirror, 1457 int method_id, int version, int bci) { 1458 1459 // Get strings and string lengths 1460 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 1461 const char* klass_name = holder->external_name(); 1462 int buf_len = (int)strlen(klass_name); 1463 1464 // The method id may point to an obsolete method, can't get more stack information 1465 Method* method = holder->method_with_idnum(method_id); 1466 if (method == NULL) { 1467 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64); 1468 // This is what the java code prints in this case - added Redefined 1469 sprintf(buf, "\tat %s.null (Redefined)", klass_name); 1470 return buf; 1471 } 1472 1473 char* method_name = method->name()->as_C_string(); 1474 buf_len += (int)strlen(method_name); 1475 1476 char* source_file_name = NULL; 1477 if (version_matches(method, version)) { 1478 Symbol* source = holder->source_file_name(); 1479 if (source != NULL) { 1480 source_file_name = source->as_C_string(); 1481 buf_len += (int)strlen(source_file_name); 1482 } 1483 } 1484 1485 // Allocate temporary buffer with extra space for formatting and line number 1486 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64); 1487 1488 // Print stack trace line in buffer 1489 sprintf(buf, "\tat %s.%s", klass_name, method_name); 1490 1491 if (!version_matches(method, version)) { 1492 strcat(buf, "(Redefined)"); 1493 } else { 1494 int line_number = get_line_number(method, bci); 1495 if (line_number == -2) { 1496 strcat(buf, "(Native Method)"); 1497 } else { 1498 if (source_file_name != NULL && (line_number != -1)) { 1499 // Sourcename and linenumber 1500 sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number); 1501 } else if (source_file_name != NULL) { 1502 // Just sourcename 1503 sprintf(buf + (int)strlen(buf), "(%s)", source_file_name); 1504 } else { 1505 // Neither sourcename nor linenumber 1506 sprintf(buf + (int)strlen(buf), "(Unknown Source)"); 1507 } 1508 nmethod* nm = method->code(); 1509 if (WizardMode && nm != NULL) { 1510 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm); 1511 } 1512 } 1513 } 1514 1515 return buf; 1516 } 1517 1518 void java_lang_Throwable::print_stack_element(outputStream *st, Handle mirror, 1519 int method_id, int version, int bci) { 1520 ResourceMark rm; 1521 char* buf = print_stack_element_to_buffer(mirror, method_id, version, bci); 1522 st->print_cr("%s", buf); 1523 } 1524 1525 void java_lang_Throwable::print_stack_element(outputStream *st, methodHandle method, int bci) { 1526 Handle mirror = method->method_holder()->java_mirror(); 1527 int method_id = method->method_idnum(); 1528 int version = method->constants()->version(); 1529 print_stack_element(st, mirror, method_id, version, bci); 1530 } 1531 1532 const char* java_lang_Throwable::no_stack_trace_message() { 1533 return "\t<<no stack trace available>>"; 1534 } 1535 1536 1537 // Currently used only for exceptions occurring during startup 1538 void java_lang_Throwable::print_stack_trace(oop throwable, outputStream* st) { 1539 Thread *THREAD = Thread::current(); 1540 Handle h_throwable(THREAD, throwable); 1541 while (h_throwable.not_null()) { 1542 objArrayHandle result (THREAD, objArrayOop(backtrace(h_throwable()))); 1543 if (result.is_null()) { 1544 st->print_cr("%s", no_stack_trace_message()); 1545 return; 1546 } 1547 1548 while (result.not_null()) { 1549 1550 // Get method id, bci, version and mirror from chunk 1551 typeArrayHandle methods (THREAD, BacktraceBuilder::get_methods(result)); 1552 typeArrayHandle bcis (THREAD, BacktraceBuilder::get_bcis(result)); 1553 objArrayHandle mirrors (THREAD, BacktraceBuilder::get_mirrors(result)); 1554 1555 int length = methods()->length(); 1556 for (int index = 0; index < length; index++) { 1557 Handle mirror(THREAD, mirrors->obj_at(index)); 1558 // NULL mirror means end of stack trace 1559 if (mirror.is_null()) goto handle_cause; 1560 int method = methods->short_at(index); 1561 int version = version_at(bcis->int_at(index)); 1562 int bci = bci_at(bcis->int_at(index)); 1563 print_stack_element(st, mirror, method, version, bci); 1564 } 1565 result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset))); 1566 } 1567 handle_cause: 1568 { 1569 EXCEPTION_MARK; 1570 JavaValue cause(T_OBJECT); 1571 JavaCalls::call_virtual(&cause, 1572 h_throwable, 1573 KlassHandle(THREAD, h_throwable->klass()), 1574 vmSymbols::getCause_name(), 1575 vmSymbols::void_throwable_signature(), 1576 THREAD); 1577 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 1578 if (HAS_PENDING_EXCEPTION) { 1579 CLEAR_PENDING_EXCEPTION; 1580 h_throwable = Handle(); 1581 } else { 1582 h_throwable = Handle(THREAD, (oop) cause.get_jobject()); 1583 if (h_throwable.not_null()) { 1584 st->print("Caused by: "); 1585 print(h_throwable, st); 1586 st->cr(); 1587 } 1588 } 1589 } 1590 } 1591 } 1592 1593 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS) { 1594 if (!StackTraceInThrowable) return; 1595 ResourceMark rm(THREAD); 1596 1597 // Start out by clearing the backtrace for this object, in case the VM 1598 // runs out of memory while allocating the stack trace 1599 set_backtrace(throwable(), NULL); 1600 // Clear lazily constructed Java level stacktrace if refilling occurs 1601 // This is unnecessary in 1.7+ but harmless 1602 clear_stacktrace(throwable()); 1603 1604 int max_depth = MaxJavaStackTraceDepth; 1605 JavaThread* thread = (JavaThread*)THREAD; 1606 BacktraceBuilder bt(CHECK); 1607 1608 // If there is no Java frame just return the method that was being called 1609 // with bci 0 1610 if (!thread->has_last_Java_frame()) { 1611 if (max_depth >= 1 && method() != NULL) { 1612 bt.push(method(), 0, CHECK); 1613 set_backtrace(throwable(), bt.backtrace()); 1614 } 1615 return; 1616 } 1617 1618 // Instead of using vframe directly, this version of fill_in_stack_trace 1619 // basically handles everything by hand. This significantly improved the 1620 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows. 1621 // See bug 6333838 for more details. 1622 // The "ASSERT" here is to verify this method generates the exactly same stack 1623 // trace as utilizing vframe. 1624 #ifdef ASSERT 1625 vframeStream st(thread); 1626 methodHandle st_method(THREAD, st.method()); 1627 #endif 1628 int total_count = 0; 1629 RegisterMap map(thread, false); 1630 int decode_offset = 0; 1631 nmethod* nm = NULL; 1632 bool skip_fillInStackTrace_check = false; 1633 bool skip_throwableInit_check = false; 1634 bool skip_hidden = !ShowHiddenFrames; 1635 1636 for (frame fr = thread->last_frame(); max_depth != total_count;) { 1637 Method* method = NULL; 1638 int bci = 0; 1639 1640 // Compiled java method case. 1641 if (decode_offset != 0) { 1642 DebugInfoReadStream stream(nm, decode_offset); 1643 decode_offset = stream.read_int(); 1644 method = (Method*)nm->metadata_at(stream.read_int()); 1645 bci = stream.read_bci(); 1646 } else { 1647 if (fr.is_first_frame()) break; 1648 address pc = fr.pc(); 1649 if (fr.is_interpreted_frame()) { 1650 address bcp = fr.interpreter_frame_bcp(); 1651 method = fr.interpreter_frame_method(); 1652 bci = method->bci_from(bcp); 1653 fr = fr.sender(&map); 1654 } else { 1655 CodeBlob* cb = fr.cb(); 1656 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL 1657 // but non nmethod 1658 fr = fr.sender(&map); 1659 if (cb == NULL || !cb->is_nmethod()) { 1660 continue; 1661 } 1662 nm = (nmethod*)cb; 1663 if (nm->method()->is_native()) { 1664 method = nm->method(); 1665 bci = 0; 1666 } else { 1667 PcDesc* pd = nm->pc_desc_at(pc); 1668 decode_offset = pd->scope_decode_offset(); 1669 // if decode_offset is not equal to 0, it will execute the 1670 // "compiled java method case" at the beginning of the loop. 1671 continue; 1672 } 1673 } 1674 } 1675 #ifdef ASSERT 1676 assert(st_method() == method && st.bci() == bci, 1677 "Wrong stack trace"); 1678 st.next(); 1679 // vframeStream::method isn't GC-safe so store off a copy 1680 // of the Method* in case we GC. 1681 if (!st.at_end()) { 1682 st_method = st.method(); 1683 } 1684 #endif 1685 1686 // the format of the stacktrace will be: 1687 // - 1 or more fillInStackTrace frames for the exception class (skipped) 1688 // - 0 or more <init> methods for the exception class (skipped) 1689 // - rest of the stack 1690 1691 if (!skip_fillInStackTrace_check) { 1692 if ((method->name() == vmSymbols::fillInStackTrace_name() || 1693 method->name() == vmSymbols::fillInStackTrace0_name()) && 1694 throwable->is_a(method->method_holder())) { 1695 continue; 1696 } 1697 else { 1698 skip_fillInStackTrace_check = true; // gone past them all 1699 } 1700 } 1701 if (!skip_throwableInit_check) { 1702 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering"); 1703 1704 // skip <init> methods of the exception class and superclasses 1705 // This is simlar to classic VM. 1706 if (method->name() == vmSymbols::object_initializer_name() && 1707 throwable->is_a(method->method_holder())) { 1708 continue; 1709 } else { 1710 // there are none or we've seen them all - either way stop checking 1711 skip_throwableInit_check = true; 1712 } 1713 } 1714 if (method->is_hidden()) { 1715 if (skip_hidden) continue; 1716 } 1717 bt.push(method, bci, CHECK); 1718 total_count++; 1719 } 1720 1721 // Put completed stack trace into throwable object 1722 set_backtrace(throwable(), bt.backtrace()); 1723 } 1724 1725 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method) { 1726 // No-op if stack trace is disabled 1727 if (!StackTraceInThrowable) { 1728 return; 1729 } 1730 1731 // Disable stack traces for some preallocated out of memory errors 1732 if (!Universe::should_fill_in_stack_trace(throwable)) { 1733 return; 1734 } 1735 1736 PRESERVE_EXCEPTION_MARK; 1737 1738 JavaThread* thread = JavaThread::active(); 1739 fill_in_stack_trace(throwable, method, thread); 1740 // ignore exceptions thrown during stack trace filling 1741 CLEAR_PENDING_EXCEPTION; 1742 } 1743 1744 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 1745 // Allocate stack trace - backtrace is created but not filled in 1746 1747 // No-op if stack trace is disabled 1748 if (!StackTraceInThrowable) return; 1749 BacktraceBuilder bt(CHECK); // creates a backtrace 1750 set_backtrace(throwable(), bt.backtrace()); 1751 } 1752 1753 1754 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 1755 // Fill in stack trace into preallocated backtrace (no GC) 1756 1757 // No-op if stack trace is disabled 1758 if (!StackTraceInThrowable) return; 1759 1760 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check"); 1761 1762 JavaThread* THREAD = JavaThread::current(); 1763 1764 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable())); 1765 assert(backtrace.not_null(), "backtrace should have been preallocated"); 1766 1767 ResourceMark rm(THREAD); 1768 vframeStream st(THREAD); 1769 1770 BacktraceBuilder bt(backtrace); 1771 1772 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 1773 // methods as preallocated errors aren't created by "java" code. 1774 1775 // fill in as much stack trace as possible 1776 typeArrayOop methods = BacktraceBuilder::get_methods(backtrace); 1777 int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth); 1778 int chunk_count = 0; 1779 1780 for (;!st.at_end(); st.next()) { 1781 bt.push(st.method(), st.bci(), CHECK); 1782 chunk_count++; 1783 1784 // Bail-out for deep stacks 1785 if (chunk_count >= max_chunks) break; 1786 } 1787 1788 // We support the Throwable immutability protocol defined for Java 7. 1789 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace()); 1790 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized"); 1791 } 1792 1793 1794 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) { 1795 if (throwable == NULL) { 1796 THROW_0(vmSymbols::java_lang_NullPointerException()); 1797 } 1798 objArrayOop chunk = objArrayOop(backtrace(throwable)); 1799 int depth = 0; 1800 if (chunk != NULL) { 1801 // Iterate over chunks and count full ones 1802 while (true) { 1803 objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset)); 1804 if (next == NULL) break; 1805 depth += trace_chunk_size; 1806 chunk = next; 1807 } 1808 assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check"); 1809 // Count element in remaining partial chunk. NULL value for mirror 1810 // marks the end of the stack trace elements that are saved. 1811 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk); 1812 assert(mirrors != NULL, "sanity check"); 1813 for (int i = 0; i < mirrors->length(); i++) { 1814 if (mirrors->obj_at(i) == NULL) break; 1815 depth++; 1816 } 1817 } 1818 return depth; 1819 } 1820 1821 1822 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) { 1823 if (throwable == NULL) { 1824 THROW_0(vmSymbols::java_lang_NullPointerException()); 1825 } 1826 if (index < 0) { 1827 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 1828 } 1829 // Compute how many chunks to skip and index into actual chunk 1830 objArrayOop chunk = objArrayOop(backtrace(throwable)); 1831 int skip_chunks = index / trace_chunk_size; 1832 int chunk_index = index % trace_chunk_size; 1833 while (chunk != NULL && skip_chunks > 0) { 1834 chunk = objArrayOop(chunk->obj_at(trace_next_offset)); 1835 skip_chunks--; 1836 } 1837 if (chunk == NULL) { 1838 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 1839 } 1840 // Get method id, bci, version and mirror from chunk 1841 typeArrayOop methods = BacktraceBuilder::get_methods(chunk); 1842 typeArrayOop bcis = BacktraceBuilder::get_bcis(chunk); 1843 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk); 1844 1845 assert(methods != NULL && bcis != NULL && mirrors != NULL, "sanity check"); 1846 1847 int method = methods->short_at(chunk_index); 1848 int version = version_at(bcis->int_at(chunk_index)); 1849 int bci = bci_at(bcis->int_at(chunk_index)); 1850 Handle mirror(THREAD, mirrors->obj_at(chunk_index)); 1851 1852 // Chunk can be partial full 1853 if (mirror.is_null()) { 1854 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 1855 } 1856 1857 oop element = java_lang_StackTraceElement::create(mirror, method, version, bci, CHECK_0); 1858 return element; 1859 } 1860 1861 oop java_lang_StackTraceElement::create(Handle mirror, int method_id, 1862 int version, int bci, TRAPS) { 1863 // Allocate java.lang.StackTraceElement instance 1864 Klass* k = SystemDictionary::StackTraceElement_klass(); 1865 assert(k != NULL, "must be loaded in 1.4+"); 1866 instanceKlassHandle ik (THREAD, k); 1867 if (ik->should_be_initialized()) { 1868 ik->initialize(CHECK_0); 1869 } 1870 1871 Handle element = ik->allocate_instance_handle(CHECK_0); 1872 // Fill in class name 1873 ResourceMark rm(THREAD); 1874 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 1875 const char* str = holder->external_name(); 1876 oop classname = StringTable::intern((char*) str, CHECK_0); 1877 java_lang_StackTraceElement::set_declaringClass(element(), classname); 1878 1879 Method* method = holder->method_with_idnum(method_id); 1880 // Method on stack may be obsolete because it was redefined so cannot be 1881 // found by idnum. 1882 if (method == NULL) { 1883 // leave name and fileName null 1884 java_lang_StackTraceElement::set_lineNumber(element(), -1); 1885 return element(); 1886 } 1887 1888 // Fill in method name 1889 oop methodname = StringTable::intern(method->name(), CHECK_0); 1890 java_lang_StackTraceElement::set_methodName(element(), methodname); 1891 1892 if (!version_matches(method, version)) { 1893 // The method was redefined, accurate line number information isn't available 1894 java_lang_StackTraceElement::set_fileName(element(), NULL); 1895 java_lang_StackTraceElement::set_lineNumber(element(), -1); 1896 } else { 1897 // Fill in source file name and line number. 1898 Symbol* source = holder->source_file_name(); 1899 if (ShowHiddenFrames && source == NULL) 1900 source = vmSymbols::unknown_class_name(); 1901 oop filename = StringTable::intern(source, CHECK_0); 1902 java_lang_StackTraceElement::set_fileName(element(), filename); 1903 1904 int line_number = get_line_number(method, bci); 1905 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 1906 } 1907 return element(); 1908 } 1909 1910 oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) { 1911 Handle mirror (THREAD, method->method_holder()->java_mirror()); 1912 int method_id = method->method_idnum(); 1913 return create(mirror, method_id, method->constants()->version(), bci, THREAD); 1914 } 1915 1916 void java_lang_reflect_AccessibleObject::compute_offsets() { 1917 Klass* k = SystemDictionary::reflect_AccessibleObject_klass(); 1918 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature()); 1919 } 1920 1921 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 1922 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1923 return (jboolean) reflect->bool_field(override_offset); 1924 } 1925 1926 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 1927 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1928 reflect->bool_field_put(override_offset, (int) value); 1929 } 1930 1931 void java_lang_reflect_Method::compute_offsets() { 1932 Klass* k = SystemDictionary::reflect_Method_klass(); 1933 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 1934 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1935 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature()); 1936 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 1937 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 1938 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 1939 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 1940 // The generic signature and annotations fields are only present in 1.5 1941 signature_offset = -1; 1942 annotations_offset = -1; 1943 parameter_annotations_offset = -1; 1944 annotation_default_offset = -1; 1945 type_annotations_offset = -1; 1946 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 1947 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 1948 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 1949 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature()); 1950 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 1951 } 1952 1953 Handle java_lang_reflect_Method::create(TRAPS) { 1954 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1955 Klass* klass = SystemDictionary::reflect_Method_klass(); 1956 // This class is eagerly initialized during VM initialization, since we keep a refence 1957 // to one of the methods 1958 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized"); 1959 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD); 1960 } 1961 1962 oop java_lang_reflect_Method::clazz(oop reflect) { 1963 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1964 return reflect->obj_field(clazz_offset); 1965 } 1966 1967 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 1968 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1969 reflect->obj_field_put(clazz_offset, value); 1970 } 1971 1972 int java_lang_reflect_Method::slot(oop reflect) { 1973 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1974 return reflect->int_field(slot_offset); 1975 } 1976 1977 void java_lang_reflect_Method::set_slot(oop reflect, int value) { 1978 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1979 reflect->int_field_put(slot_offset, value); 1980 } 1981 1982 oop java_lang_reflect_Method::name(oop method) { 1983 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1984 return method->obj_field(name_offset); 1985 } 1986 1987 void java_lang_reflect_Method::set_name(oop method, oop value) { 1988 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1989 method->obj_field_put(name_offset, value); 1990 } 1991 1992 oop java_lang_reflect_Method::return_type(oop method) { 1993 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1994 return method->obj_field(returnType_offset); 1995 } 1996 1997 void java_lang_reflect_Method::set_return_type(oop method, oop value) { 1998 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1999 method->obj_field_put(returnType_offset, value); 2000 } 2001 2002 oop java_lang_reflect_Method::parameter_types(oop method) { 2003 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2004 return method->obj_field(parameterTypes_offset); 2005 } 2006 2007 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 2008 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2009 method->obj_field_put(parameterTypes_offset, value); 2010 } 2011 2012 oop java_lang_reflect_Method::exception_types(oop method) { 2013 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2014 return method->obj_field(exceptionTypes_offset); 2015 } 2016 2017 void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 2018 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2019 method->obj_field_put(exceptionTypes_offset, value); 2020 } 2021 2022 int java_lang_reflect_Method::modifiers(oop method) { 2023 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2024 return method->int_field(modifiers_offset); 2025 } 2026 2027 void java_lang_reflect_Method::set_modifiers(oop method, int value) { 2028 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2029 method->int_field_put(modifiers_offset, value); 2030 } 2031 2032 bool java_lang_reflect_Method::has_signature_field() { 2033 return (signature_offset >= 0); 2034 } 2035 2036 oop java_lang_reflect_Method::signature(oop method) { 2037 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2038 assert(has_signature_field(), "signature field must be present"); 2039 return method->obj_field(signature_offset); 2040 } 2041 2042 void java_lang_reflect_Method::set_signature(oop method, oop value) { 2043 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2044 assert(has_signature_field(), "signature field must be present"); 2045 method->obj_field_put(signature_offset, value); 2046 } 2047 2048 bool java_lang_reflect_Method::has_annotations_field() { 2049 return (annotations_offset >= 0); 2050 } 2051 2052 oop java_lang_reflect_Method::annotations(oop method) { 2053 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2054 assert(has_annotations_field(), "annotations field must be present"); 2055 return method->obj_field(annotations_offset); 2056 } 2057 2058 void java_lang_reflect_Method::set_annotations(oop method, oop value) { 2059 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2060 assert(has_annotations_field(), "annotations field must be present"); 2061 method->obj_field_put(annotations_offset, value); 2062 } 2063 2064 bool java_lang_reflect_Method::has_parameter_annotations_field() { 2065 return (parameter_annotations_offset >= 0); 2066 } 2067 2068 oop java_lang_reflect_Method::parameter_annotations(oop method) { 2069 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2070 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2071 return method->obj_field(parameter_annotations_offset); 2072 } 2073 2074 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 2075 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2076 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2077 method->obj_field_put(parameter_annotations_offset, value); 2078 } 2079 2080 bool java_lang_reflect_Method::has_annotation_default_field() { 2081 return (annotation_default_offset >= 0); 2082 } 2083 2084 oop java_lang_reflect_Method::annotation_default(oop method) { 2085 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2086 assert(has_annotation_default_field(), "annotation default field must be present"); 2087 return method->obj_field(annotation_default_offset); 2088 } 2089 2090 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 2091 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2092 assert(has_annotation_default_field(), "annotation default field must be present"); 2093 method->obj_field_put(annotation_default_offset, value); 2094 } 2095 2096 bool java_lang_reflect_Method::has_type_annotations_field() { 2097 return (type_annotations_offset >= 0); 2098 } 2099 2100 oop java_lang_reflect_Method::type_annotations(oop method) { 2101 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2102 assert(has_type_annotations_field(), "type_annotations field must be present"); 2103 return method->obj_field(type_annotations_offset); 2104 } 2105 2106 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) { 2107 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2108 assert(has_type_annotations_field(), "type_annotations field must be present"); 2109 method->obj_field_put(type_annotations_offset, value); 2110 } 2111 2112 void java_lang_reflect_Constructor::compute_offsets() { 2113 Klass* k = SystemDictionary::reflect_Constructor_klass(); 2114 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2115 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 2116 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 2117 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 2118 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2119 // The generic signature and annotations fields are only present in 1.5 2120 signature_offset = -1; 2121 annotations_offset = -1; 2122 parameter_annotations_offset = -1; 2123 type_annotations_offset = -1; 2124 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 2125 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 2126 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 2127 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 2128 } 2129 2130 Handle java_lang_reflect_Constructor::create(TRAPS) { 2131 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2132 Symbol* name = vmSymbols::java_lang_reflect_Constructor(); 2133 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2134 instanceKlassHandle klass (THREAD, k); 2135 // Ensure it is initialized 2136 klass->initialize(CHECK_NH); 2137 return klass->allocate_instance_handle(THREAD); 2138 } 2139 2140 oop java_lang_reflect_Constructor::clazz(oop reflect) { 2141 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2142 return reflect->obj_field(clazz_offset); 2143 } 2144 2145 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 2146 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2147 reflect->obj_field_put(clazz_offset, value); 2148 } 2149 2150 oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 2151 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2152 return constructor->obj_field(parameterTypes_offset); 2153 } 2154 2155 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 2156 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2157 constructor->obj_field_put(parameterTypes_offset, value); 2158 } 2159 2160 oop java_lang_reflect_Constructor::exception_types(oop constructor) { 2161 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2162 return constructor->obj_field(exceptionTypes_offset); 2163 } 2164 2165 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 2166 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2167 constructor->obj_field_put(exceptionTypes_offset, value); 2168 } 2169 2170 int java_lang_reflect_Constructor::slot(oop reflect) { 2171 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2172 return reflect->int_field(slot_offset); 2173 } 2174 2175 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 2176 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2177 reflect->int_field_put(slot_offset, value); 2178 } 2179 2180 int java_lang_reflect_Constructor::modifiers(oop constructor) { 2181 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2182 return constructor->int_field(modifiers_offset); 2183 } 2184 2185 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 2186 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2187 constructor->int_field_put(modifiers_offset, value); 2188 } 2189 2190 bool java_lang_reflect_Constructor::has_signature_field() { 2191 return (signature_offset >= 0); 2192 } 2193 2194 oop java_lang_reflect_Constructor::signature(oop constructor) { 2195 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2196 assert(has_signature_field(), "signature field must be present"); 2197 return constructor->obj_field(signature_offset); 2198 } 2199 2200 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 2201 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2202 assert(has_signature_field(), "signature field must be present"); 2203 constructor->obj_field_put(signature_offset, value); 2204 } 2205 2206 bool java_lang_reflect_Constructor::has_annotations_field() { 2207 return (annotations_offset >= 0); 2208 } 2209 2210 oop java_lang_reflect_Constructor::annotations(oop constructor) { 2211 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2212 assert(has_annotations_field(), "annotations field must be present"); 2213 return constructor->obj_field(annotations_offset); 2214 } 2215 2216 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 2217 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2218 assert(has_annotations_field(), "annotations field must be present"); 2219 constructor->obj_field_put(annotations_offset, value); 2220 } 2221 2222 bool java_lang_reflect_Constructor::has_parameter_annotations_field() { 2223 return (parameter_annotations_offset >= 0); 2224 } 2225 2226 oop java_lang_reflect_Constructor::parameter_annotations(oop method) { 2227 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2228 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2229 return method->obj_field(parameter_annotations_offset); 2230 } 2231 2232 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 2233 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2234 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2235 method->obj_field_put(parameter_annotations_offset, value); 2236 } 2237 2238 bool java_lang_reflect_Constructor::has_type_annotations_field() { 2239 return (type_annotations_offset >= 0); 2240 } 2241 2242 oop java_lang_reflect_Constructor::type_annotations(oop constructor) { 2243 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2244 assert(has_type_annotations_field(), "type_annotations field must be present"); 2245 return constructor->obj_field(type_annotations_offset); 2246 } 2247 2248 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) { 2249 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2250 assert(has_type_annotations_field(), "type_annotations field must be present"); 2251 constructor->obj_field_put(type_annotations_offset, value); 2252 } 2253 2254 void java_lang_reflect_Field::compute_offsets() { 2255 Klass* k = SystemDictionary::reflect_Field_klass(); 2256 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2257 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2258 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature()); 2259 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 2260 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2261 // The generic signature and annotations fields are only present in 1.5 2262 signature_offset = -1; 2263 annotations_offset = -1; 2264 type_annotations_offset = -1; 2265 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 2266 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 2267 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 2268 } 2269 2270 Handle java_lang_reflect_Field::create(TRAPS) { 2271 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2272 Symbol* name = vmSymbols::java_lang_reflect_Field(); 2273 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2274 instanceKlassHandle klass (THREAD, k); 2275 // Ensure it is initialized 2276 klass->initialize(CHECK_NH); 2277 return klass->allocate_instance_handle(THREAD); 2278 } 2279 2280 oop java_lang_reflect_Field::clazz(oop reflect) { 2281 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2282 return reflect->obj_field(clazz_offset); 2283 } 2284 2285 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 2286 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2287 reflect->obj_field_put(clazz_offset, value); 2288 } 2289 2290 oop java_lang_reflect_Field::name(oop field) { 2291 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2292 return field->obj_field(name_offset); 2293 } 2294 2295 void java_lang_reflect_Field::set_name(oop field, oop value) { 2296 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2297 field->obj_field_put(name_offset, value); 2298 } 2299 2300 oop java_lang_reflect_Field::type(oop field) { 2301 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2302 return field->obj_field(type_offset); 2303 } 2304 2305 void java_lang_reflect_Field::set_type(oop field, oop value) { 2306 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2307 field->obj_field_put(type_offset, value); 2308 } 2309 2310 int java_lang_reflect_Field::slot(oop reflect) { 2311 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2312 return reflect->int_field(slot_offset); 2313 } 2314 2315 void java_lang_reflect_Field::set_slot(oop reflect, int value) { 2316 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2317 reflect->int_field_put(slot_offset, value); 2318 } 2319 2320 int java_lang_reflect_Field::modifiers(oop field) { 2321 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2322 return field->int_field(modifiers_offset); 2323 } 2324 2325 void java_lang_reflect_Field::set_modifiers(oop field, int value) { 2326 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2327 field->int_field_put(modifiers_offset, value); 2328 } 2329 2330 bool java_lang_reflect_Field::has_signature_field() { 2331 return (signature_offset >= 0); 2332 } 2333 2334 oop java_lang_reflect_Field::signature(oop field) { 2335 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2336 assert(has_signature_field(), "signature field must be present"); 2337 return field->obj_field(signature_offset); 2338 } 2339 2340 void java_lang_reflect_Field::set_signature(oop field, oop value) { 2341 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2342 assert(has_signature_field(), "signature field must be present"); 2343 field->obj_field_put(signature_offset, value); 2344 } 2345 2346 bool java_lang_reflect_Field::has_annotations_field() { 2347 return (annotations_offset >= 0); 2348 } 2349 2350 oop java_lang_reflect_Field::annotations(oop field) { 2351 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2352 assert(has_annotations_field(), "annotations field must be present"); 2353 return field->obj_field(annotations_offset); 2354 } 2355 2356 void java_lang_reflect_Field::set_annotations(oop field, oop value) { 2357 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2358 assert(has_annotations_field(), "annotations field must be present"); 2359 field->obj_field_put(annotations_offset, value); 2360 } 2361 2362 bool java_lang_reflect_Field::has_type_annotations_field() { 2363 return (type_annotations_offset >= 0); 2364 } 2365 2366 oop java_lang_reflect_Field::type_annotations(oop field) { 2367 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2368 assert(has_type_annotations_field(), "type_annotations field must be present"); 2369 return field->obj_field(type_annotations_offset); 2370 } 2371 2372 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) { 2373 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2374 assert(has_type_annotations_field(), "type_annotations field must be present"); 2375 field->obj_field_put(type_annotations_offset, value); 2376 } 2377 2378 void sun_reflect_ConstantPool::compute_offsets() { 2379 Klass* k = SystemDictionary::reflect_ConstantPool_klass(); 2380 // This null test can be removed post beta 2381 if (k != NULL) { 2382 // The field is called ConstantPool* in the sun.reflect.ConstantPool class. 2383 compute_offset(_oop_offset, k, vmSymbols::ConstantPool_name(), vmSymbols::object_signature()); 2384 } 2385 } 2386 2387 void java_lang_reflect_Parameter::compute_offsets() { 2388 Klass* k = SystemDictionary::reflect_Parameter_klass(); 2389 if(NULL != k) { 2390 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2391 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2392 compute_offset(index_offset, k, vmSymbols::index_name(), vmSymbols::int_signature()); 2393 compute_offset(executable_offset, k, vmSymbols::executable_name(), vmSymbols::executable_signature()); 2394 } 2395 } 2396 2397 Handle java_lang_reflect_Parameter::create(TRAPS) { 2398 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2399 Symbol* name = vmSymbols::java_lang_reflect_Parameter(); 2400 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2401 instanceKlassHandle klass (THREAD, k); 2402 // Ensure it is initialized 2403 klass->initialize(CHECK_NH); 2404 return klass->allocate_instance_handle(THREAD); 2405 } 2406 2407 oop java_lang_reflect_Parameter::name(oop param) { 2408 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2409 return param->obj_field(name_offset); 2410 } 2411 2412 void java_lang_reflect_Parameter::set_name(oop param, oop value) { 2413 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2414 param->obj_field_put(name_offset, value); 2415 } 2416 2417 int java_lang_reflect_Parameter::modifiers(oop param) { 2418 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2419 return param->int_field(modifiers_offset); 2420 } 2421 2422 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) { 2423 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2424 param->int_field_put(modifiers_offset, value); 2425 } 2426 2427 int java_lang_reflect_Parameter::index(oop param) { 2428 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2429 return param->int_field(index_offset); 2430 } 2431 2432 void java_lang_reflect_Parameter::set_index(oop param, int value) { 2433 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2434 param->int_field_put(index_offset, value); 2435 } 2436 2437 oop java_lang_reflect_Parameter::executable(oop param) { 2438 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2439 return param->obj_field(executable_offset); 2440 } 2441 2442 void java_lang_reflect_Parameter::set_executable(oop param, oop value) { 2443 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2444 param->obj_field_put(executable_offset, value); 2445 } 2446 2447 2448 Handle sun_reflect_ConstantPool::create(TRAPS) { 2449 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2450 Klass* k = SystemDictionary::reflect_ConstantPool_klass(); 2451 instanceKlassHandle klass (THREAD, k); 2452 // Ensure it is initialized 2453 klass->initialize(CHECK_NH); 2454 return klass->allocate_instance_handle(THREAD); 2455 } 2456 2457 2458 void sun_reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) { 2459 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2460 oop mirror = value->pool_holder()->java_mirror(); 2461 // Save the mirror to get back the constant pool. 2462 reflect->obj_field_put(_oop_offset, mirror); 2463 } 2464 2465 ConstantPool* sun_reflect_ConstantPool::get_cp(oop reflect) { 2466 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2467 2468 oop mirror = reflect->obj_field(_oop_offset); 2469 Klass* k = java_lang_Class::as_Klass(mirror); 2470 assert(k->oop_is_instance(), "Must be"); 2471 2472 // Get the constant pool back from the klass. Since class redefinition 2473 // merges the new constant pool into the old, this is essentially the 2474 // same constant pool as the original. If constant pool merging is 2475 // no longer done in the future, this will have to change to save 2476 // the original. 2477 return InstanceKlass::cast(k)->constants(); 2478 } 2479 2480 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() { 2481 Klass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass(); 2482 // This null test can be removed post beta 2483 if (k != NULL) { 2484 compute_offset(_base_offset, k, 2485 vmSymbols::base_name(), vmSymbols::object_signature()); 2486 } 2487 } 2488 2489 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 2490 Klass* k = SystemDictionary::box_klass(type); 2491 if (k == NULL) return NULL; 2492 instanceKlassHandle h (THREAD, k); 2493 if (!h->is_initialized()) h->initialize(CHECK_0); 2494 return h->allocate_instance(THREAD); 2495 } 2496 2497 2498 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 2499 oop box = initialize_and_allocate(type, CHECK_0); 2500 if (box == NULL) return NULL; 2501 switch (type) { 2502 case T_BOOLEAN: 2503 box->bool_field_put(value_offset, value->z); 2504 break; 2505 case T_CHAR: 2506 box->char_field_put(value_offset, value->c); 2507 break; 2508 case T_FLOAT: 2509 box->float_field_put(value_offset, value->f); 2510 break; 2511 case T_DOUBLE: 2512 box->double_field_put(long_value_offset, value->d); 2513 break; 2514 case T_BYTE: 2515 box->byte_field_put(value_offset, value->b); 2516 break; 2517 case T_SHORT: 2518 box->short_field_put(value_offset, value->s); 2519 break; 2520 case T_INT: 2521 box->int_field_put(value_offset, value->i); 2522 break; 2523 case T_LONG: 2524 box->long_field_put(long_value_offset, value->j); 2525 break; 2526 default: 2527 return NULL; 2528 } 2529 return box; 2530 } 2531 2532 2533 BasicType java_lang_boxing_object::basic_type(oop box) { 2534 if (box == NULL) return T_ILLEGAL; 2535 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2536 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 2537 return T_ILLEGAL; 2538 return type; 2539 } 2540 2541 2542 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 2543 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2544 switch (type) { 2545 case T_BOOLEAN: 2546 value->z = box->bool_field(value_offset); 2547 break; 2548 case T_CHAR: 2549 value->c = box->char_field(value_offset); 2550 break; 2551 case T_FLOAT: 2552 value->f = box->float_field(value_offset); 2553 break; 2554 case T_DOUBLE: 2555 value->d = box->double_field(long_value_offset); 2556 break; 2557 case T_BYTE: 2558 value->b = box->byte_field(value_offset); 2559 break; 2560 case T_SHORT: 2561 value->s = box->short_field(value_offset); 2562 break; 2563 case T_INT: 2564 value->i = box->int_field(value_offset); 2565 break; 2566 case T_LONG: 2567 value->j = box->long_field(long_value_offset); 2568 break; 2569 default: 2570 return T_ILLEGAL; 2571 } // end switch 2572 return type; 2573 } 2574 2575 2576 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 2577 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2578 switch (type) { 2579 case T_BOOLEAN: 2580 box->bool_field_put(value_offset, value->z); 2581 break; 2582 case T_CHAR: 2583 box->char_field_put(value_offset, value->c); 2584 break; 2585 case T_FLOAT: 2586 box->float_field_put(value_offset, value->f); 2587 break; 2588 case T_DOUBLE: 2589 box->double_field_put(long_value_offset, value->d); 2590 break; 2591 case T_BYTE: 2592 box->byte_field_put(value_offset, value->b); 2593 break; 2594 case T_SHORT: 2595 box->short_field_put(value_offset, value->s); 2596 break; 2597 case T_INT: 2598 box->int_field_put(value_offset, value->i); 2599 break; 2600 case T_LONG: 2601 box->long_field_put(long_value_offset, value->j); 2602 break; 2603 default: 2604 return T_ILLEGAL; 2605 } // end switch 2606 return type; 2607 } 2608 2609 2610 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) { 2611 switch (type) { 2612 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break; 2613 case T_CHAR: st->print("%d", value->c); break; 2614 case T_BYTE: st->print("%d", value->b); break; 2615 case T_SHORT: st->print("%d", value->s); break; 2616 case T_INT: st->print("%d", value->i); break; 2617 case T_LONG: st->print(INT64_FORMAT, value->j); break; 2618 case T_FLOAT: st->print("%f", value->f); break; 2619 case T_DOUBLE: st->print("%lf", value->d); break; 2620 default: st->print("type %d?", type); break; 2621 } 2622 } 2623 2624 2625 // Support for java_lang_ref_Reference 2626 HeapWord *java_lang_ref_Reference::pending_list_lock_addr() { 2627 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass()); 2628 address addr = ik->static_field_addr(static_lock_offset); 2629 return (HeapWord*) addr; 2630 } 2631 2632 oop java_lang_ref_Reference::pending_list_lock() { 2633 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass()); 2634 address addr = ik->static_field_addr(static_lock_offset); 2635 if (UseCompressedOops) { 2636 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 2637 } else { 2638 return oopDesc::load_decode_heap_oop((oop*)addr); 2639 } 2640 } 2641 2642 HeapWord *java_lang_ref_Reference::pending_list_addr() { 2643 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass()); 2644 address addr = ik->static_field_addr(static_pending_offset); 2645 // XXX This might not be HeapWord aligned, almost rather be char *. 2646 return (HeapWord*)addr; 2647 } 2648 2649 oop java_lang_ref_Reference::pending_list() { 2650 char *addr = (char *)pending_list_addr(); 2651 if (UseCompressedOops) { 2652 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 2653 } else { 2654 return oopDesc::load_decode_heap_oop((oop*)addr); 2655 } 2656 } 2657 2658 2659 // Support for java_lang_ref_SoftReference 2660 2661 jlong java_lang_ref_SoftReference::timestamp(oop ref) { 2662 return ref->long_field(timestamp_offset); 2663 } 2664 2665 jlong java_lang_ref_SoftReference::clock() { 2666 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass()); 2667 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset); 2668 return *offset; 2669 } 2670 2671 void java_lang_ref_SoftReference::set_clock(jlong value) { 2672 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass()); 2673 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset); 2674 *offset = value; 2675 } 2676 2677 // Support for java_lang_invoke_DirectMethodHandle 2678 2679 int java_lang_invoke_DirectMethodHandle::_member_offset; 2680 2681 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) { 2682 oop member_name = NULL; 2683 bool is_dmh = dmh->is_oop() && java_lang_invoke_DirectMethodHandle::is_instance(dmh); 2684 assert(is_dmh, "a DirectMethodHandle oop is expected"); 2685 if (is_dmh) { 2686 member_name = dmh->obj_field(member_offset_in_bytes()); 2687 } 2688 return member_name; 2689 } 2690 2691 void java_lang_invoke_DirectMethodHandle::compute_offsets() { 2692 Klass* klass_oop = SystemDictionary::DirectMethodHandle_klass(); 2693 if (klass_oop != NULL) { 2694 compute_offset(_member_offset, klass_oop, vmSymbols::member_name(), vmSymbols::java_lang_invoke_MemberName_signature()); 2695 } 2696 } 2697 2698 // Support for java_lang_invoke_MethodHandle 2699 2700 int java_lang_invoke_MethodHandle::_type_offset; 2701 int java_lang_invoke_MethodHandle::_form_offset; 2702 2703 int java_lang_invoke_MemberName::_clazz_offset; 2704 int java_lang_invoke_MemberName::_name_offset; 2705 int java_lang_invoke_MemberName::_type_offset; 2706 int java_lang_invoke_MemberName::_flags_offset; 2707 int java_lang_invoke_MemberName::_vmtarget_offset; 2708 int java_lang_invoke_MemberName::_vmloader_offset; 2709 int java_lang_invoke_MemberName::_vmindex_offset; 2710 2711 int java_lang_invoke_LambdaForm::_vmentry_offset; 2712 2713 void java_lang_invoke_MethodHandle::compute_offsets() { 2714 Klass* klass_oop = SystemDictionary::MethodHandle_klass(); 2715 if (klass_oop != NULL) { 2716 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature()); 2717 compute_offset(_form_offset, klass_oop, vmSymbols::form_name(), vmSymbols::java_lang_invoke_LambdaForm_signature()); 2718 } 2719 } 2720 2721 void java_lang_invoke_MemberName::compute_offsets() { 2722 Klass* klass_oop = SystemDictionary::MemberName_klass(); 2723 if (klass_oop != NULL) { 2724 compute_offset(_clazz_offset, klass_oop, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2725 compute_offset(_name_offset, klass_oop, vmSymbols::name_name(), vmSymbols::string_signature()); 2726 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::object_signature()); 2727 compute_offset(_flags_offset, klass_oop, vmSymbols::flags_name(), vmSymbols::int_signature()); 2728 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 2729 } 2730 } 2731 2732 void java_lang_invoke_LambdaForm::compute_offsets() { 2733 Klass* klass_oop = SystemDictionary::LambdaForm_klass(); 2734 if (klass_oop != NULL) { 2735 compute_offset(_vmentry_offset, klass_oop, vmSymbols::vmentry_name(), vmSymbols::java_lang_invoke_MemberName_signature()); 2736 } 2737 } 2738 2739 bool java_lang_invoke_LambdaForm::is_instance(oop obj) { 2740 return obj != NULL && is_subclass(obj->klass()); 2741 } 2742 2743 2744 oop java_lang_invoke_MethodHandle::type(oop mh) { 2745 return mh->obj_field(_type_offset); 2746 } 2747 2748 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) { 2749 mh->obj_field_put(_type_offset, mtype); 2750 } 2751 2752 oop java_lang_invoke_MethodHandle::form(oop mh) { 2753 assert(_form_offset != 0, ""); 2754 return mh->obj_field(_form_offset); 2755 } 2756 2757 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) { 2758 assert(_form_offset != 0, ""); 2759 mh->obj_field_put(_form_offset, lform); 2760 } 2761 2762 /// MemberName accessors 2763 2764 oop java_lang_invoke_MemberName::clazz(oop mname) { 2765 assert(is_instance(mname), "wrong type"); 2766 return mname->obj_field(_clazz_offset); 2767 } 2768 2769 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) { 2770 assert(is_instance(mname), "wrong type"); 2771 mname->obj_field_put(_clazz_offset, clazz); 2772 } 2773 2774 oop java_lang_invoke_MemberName::name(oop mname) { 2775 assert(is_instance(mname), "wrong type"); 2776 return mname->obj_field(_name_offset); 2777 } 2778 2779 void java_lang_invoke_MemberName::set_name(oop mname, oop name) { 2780 assert(is_instance(mname), "wrong type"); 2781 mname->obj_field_put(_name_offset, name); 2782 } 2783 2784 oop java_lang_invoke_MemberName::type(oop mname) { 2785 assert(is_instance(mname), "wrong type"); 2786 return mname->obj_field(_type_offset); 2787 } 2788 2789 void java_lang_invoke_MemberName::set_type(oop mname, oop type) { 2790 assert(is_instance(mname), "wrong type"); 2791 mname->obj_field_put(_type_offset, type); 2792 } 2793 2794 int java_lang_invoke_MemberName::flags(oop mname) { 2795 assert(is_instance(mname), "wrong type"); 2796 return mname->int_field(_flags_offset); 2797 } 2798 2799 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) { 2800 assert(is_instance(mname), "wrong type"); 2801 mname->int_field_put(_flags_offset, flags); 2802 } 2803 2804 Metadata* java_lang_invoke_MemberName::vmtarget(oop mname) { 2805 assert(is_instance(mname), "wrong type"); 2806 return (Metadata*)mname->address_field(_vmtarget_offset); 2807 } 2808 2809 bool java_lang_invoke_MemberName::is_method(oop mname) { 2810 assert(is_instance(mname), "must be MemberName"); 2811 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0; 2812 } 2813 2814 #if INCLUDE_JVMTI 2815 // Can be executed on VM thread only 2816 void java_lang_invoke_MemberName::adjust_vmtarget(oop mname, Method* old_method, 2817 Method* new_method, bool* trace_name_printed) { 2818 assert(is_method(mname), "wrong type"); 2819 assert(Thread::current()->is_VM_thread(), "not VM thread"); 2820 2821 Method* target = (Method*)mname->address_field(_vmtarget_offset); 2822 if (target == old_method) { 2823 mname->address_field_put(_vmtarget_offset, (address)new_method); 2824 2825 if (RC_TRACE_IN_RANGE(0x00100000, 0x00400000)) { 2826 if (!(*trace_name_printed)) { 2827 // RC_TRACE_MESG macro has an embedded ResourceMark 2828 RC_TRACE_MESG(("adjust: name=%s", 2829 old_method->method_holder()->external_name())); 2830 *trace_name_printed = true; 2831 } 2832 // RC_TRACE macro has an embedded ResourceMark 2833 RC_TRACE(0x00400000, ("MemberName method update: %s(%s)", 2834 new_method->name()->as_C_string(), 2835 new_method->signature()->as_C_string())); 2836 } 2837 } 2838 } 2839 #endif // INCLUDE_JVMTI 2840 2841 void java_lang_invoke_MemberName::set_vmtarget(oop mname, Metadata* ref) { 2842 assert(is_instance(mname), "wrong type"); 2843 // check the type of the vmtarget 2844 oop dependency = NULL; 2845 if (ref != NULL) { 2846 switch (flags(mname) & (MN_IS_METHOD | 2847 MN_IS_CONSTRUCTOR | 2848 MN_IS_FIELD)) { 2849 case MN_IS_METHOD: 2850 case MN_IS_CONSTRUCTOR: 2851 assert(ref->is_method(), "should be a method"); 2852 dependency = ((Method*)ref)->method_holder()->java_mirror(); 2853 break; 2854 case MN_IS_FIELD: 2855 assert(ref->is_klass(), "should be a class"); 2856 dependency = ((Klass*)ref)->java_mirror(); 2857 break; 2858 default: 2859 ShouldNotReachHere(); 2860 } 2861 } 2862 mname->address_field_put(_vmtarget_offset, (address)ref); 2863 // Add a reference to the loader (actually mirror because anonymous classes will not have 2864 // distinct loaders) to ensure the metadata is kept alive 2865 // This mirror may be different than the one in clazz field. 2866 mname->obj_field_put(_vmloader_offset, dependency); 2867 } 2868 2869 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) { 2870 assert(is_instance(mname), "wrong type"); 2871 return (intptr_t) mname->address_field(_vmindex_offset); 2872 } 2873 2874 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) { 2875 assert(is_instance(mname), "wrong type"); 2876 mname->address_field_put(_vmindex_offset, (address) index); 2877 } 2878 2879 oop java_lang_invoke_LambdaForm::vmentry(oop lform) { 2880 assert(is_instance(lform), "wrong type"); 2881 return lform->obj_field(_vmentry_offset); 2882 } 2883 2884 2885 // Support for java_lang_invoke_MethodType 2886 2887 int java_lang_invoke_MethodType::_rtype_offset; 2888 int java_lang_invoke_MethodType::_ptypes_offset; 2889 2890 void java_lang_invoke_MethodType::compute_offsets() { 2891 Klass* k = SystemDictionary::MethodType_klass(); 2892 if (k != NULL) { 2893 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature()); 2894 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature()); 2895 } 2896 } 2897 2898 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) { 2899 st->print("("); 2900 objArrayOop pts = ptypes(mt); 2901 for (int i = 0, limit = pts->length(); i < limit; i++) { 2902 java_lang_Class::print_signature(pts->obj_at(i), st); 2903 } 2904 st->print(")"); 2905 java_lang_Class::print_signature(rtype(mt), st); 2906 } 2907 2908 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) { 2909 ResourceMark rm; 2910 stringStream buffer(128); 2911 print_signature(mt, &buffer); 2912 const char* sigstr = buffer.base(); 2913 int siglen = (int) buffer.size(); 2914 Symbol *name; 2915 if (!intern_if_not_found) { 2916 name = SymbolTable::probe(sigstr, siglen); 2917 } else { 2918 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 2919 } 2920 return name; 2921 } 2922 2923 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) { 2924 if (mt1 == mt2) 2925 return true; 2926 if (rtype(mt1) != rtype(mt2)) 2927 return false; 2928 if (ptype_count(mt1) != ptype_count(mt2)) 2929 return false; 2930 for (int i = ptype_count(mt1) - 1; i >= 0; i--) { 2931 if (ptype(mt1, i) != ptype(mt2, i)) 2932 return false; 2933 } 2934 return true; 2935 } 2936 2937 oop java_lang_invoke_MethodType::rtype(oop mt) { 2938 assert(is_instance(mt), "must be a MethodType"); 2939 return mt->obj_field(_rtype_offset); 2940 } 2941 2942 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) { 2943 assert(is_instance(mt), "must be a MethodType"); 2944 return (objArrayOop) mt->obj_field(_ptypes_offset); 2945 } 2946 2947 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) { 2948 return ptypes(mt)->obj_at(idx); 2949 } 2950 2951 int java_lang_invoke_MethodType::ptype_count(oop mt) { 2952 return ptypes(mt)->length(); 2953 } 2954 2955 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) { 2956 objArrayOop pts = ptypes(mt); 2957 int count = pts->length(); 2958 int slots = 0; 2959 for (int i = 0; i < count; i++) { 2960 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i)); 2961 slots += type2size[bt]; 2962 } 2963 return slots; 2964 } 2965 2966 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) { 2967 BasicType bt = java_lang_Class::as_BasicType(rtype(mt)); 2968 return type2size[bt]; 2969 } 2970 2971 2972 // Support for java_lang_invoke_CallSite 2973 2974 int java_lang_invoke_CallSite::_target_offset; 2975 2976 void java_lang_invoke_CallSite::compute_offsets() { 2977 Klass* k = SystemDictionary::CallSite_klass(); 2978 if (k != NULL) { 2979 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature()); 2980 } 2981 } 2982 2983 2984 // Support for java_security_AccessControlContext 2985 2986 int java_security_AccessControlContext::_context_offset = 0; 2987 int java_security_AccessControlContext::_privilegedContext_offset = 0; 2988 int java_security_AccessControlContext::_isPrivileged_offset = 0; 2989 int java_security_AccessControlContext::_isAuthorized_offset = -1; 2990 2991 void java_security_AccessControlContext::compute_offsets() { 2992 assert(_isPrivileged_offset == 0, "offsets should be initialized only once"); 2993 fieldDescriptor fd; 2994 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass()); 2995 2996 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) { 2997 fatal("Invalid layout of java.security.AccessControlContext"); 2998 } 2999 _context_offset = fd.offset(); 3000 3001 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) { 3002 fatal("Invalid layout of java.security.AccessControlContext"); 3003 } 3004 _privilegedContext_offset = fd.offset(); 3005 3006 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) { 3007 fatal("Invalid layout of java.security.AccessControlContext"); 3008 } 3009 _isPrivileged_offset = fd.offset(); 3010 3011 // The offset may not be present for bootstrapping with older JDK. 3012 if (ik->find_local_field(vmSymbols::isAuthorized_name(), vmSymbols::bool_signature(), &fd)) { 3013 _isAuthorized_offset = fd.offset(); 3014 } 3015 } 3016 3017 3018 bool java_security_AccessControlContext::is_authorized(Handle context) { 3019 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type"); 3020 assert(_isAuthorized_offset != -1, "should be set"); 3021 return context->bool_field(_isAuthorized_offset) != 0; 3022 } 3023 3024 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) { 3025 assert(_isPrivileged_offset != 0, "offsets should have been initialized"); 3026 // Ensure klass is initialized 3027 InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->initialize(CHECK_0); 3028 // Allocate result 3029 oop result = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->allocate_instance(CHECK_0); 3030 // Fill in values 3031 result->obj_field_put(_context_offset, context()); 3032 result->obj_field_put(_privilegedContext_offset, privileged_context()); 3033 result->bool_field_put(_isPrivileged_offset, isPrivileged); 3034 // whitelist AccessControlContexts created by the JVM if present 3035 if (_isAuthorized_offset != -1) { 3036 result->bool_field_put(_isAuthorized_offset, true); 3037 } 3038 return result; 3039 } 3040 3041 3042 // Support for java_lang_ClassLoader 3043 3044 bool java_lang_ClassLoader::offsets_computed = false; 3045 int java_lang_ClassLoader::_loader_data_offset = -1; 3046 int java_lang_ClassLoader::parallelCapable_offset = -1; 3047 3048 ClassLoaderData** java_lang_ClassLoader::loader_data_addr(oop loader) { 3049 assert(loader != NULL && loader->is_oop(), "loader must be oop"); 3050 return (ClassLoaderData**) loader->address_field_addr(_loader_data_offset); 3051 } 3052 3053 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) { 3054 return *java_lang_ClassLoader::loader_data_addr(loader); 3055 } 3056 3057 void java_lang_ClassLoader::compute_offsets() { 3058 assert(!offsets_computed, "offsets should be initialized only once"); 3059 offsets_computed = true; 3060 3061 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7, 3062 Klass* k1 = SystemDictionary::ClassLoader_klass(); 3063 compute_optional_offset(parallelCapable_offset, 3064 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature()); 3065 3066 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3067 } 3068 3069 oop java_lang_ClassLoader::parent(oop loader) { 3070 assert(is_instance(loader), "loader must be oop"); 3071 return loader->obj_field(parent_offset); 3072 } 3073 3074 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) { 3075 assert(is_instance(loader), "loader must be oop"); 3076 assert(cl == NULL || is_instance(cl), "cl argument must be oop"); 3077 oop acl = loader; 3078 debug_only(jint loop_count = 0); 3079 // This loop taken verbatim from ClassLoader.java: 3080 do { 3081 acl = parent(acl); 3082 if (cl == acl) { 3083 return true; 3084 } 3085 assert(++loop_count > 0, "loop_count overflow"); 3086 } while (acl != NULL); 3087 return false; 3088 } 3089 3090 bool java_lang_ClassLoader::is_instance(oop obj) { 3091 return obj != NULL && is_subclass(obj->klass()); 3092 } 3093 3094 3095 // For class loader classes, parallelCapable defined 3096 // based on non-null field 3097 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it 3098 bool java_lang_ClassLoader::parallelCapable(oop class_loader) { 3099 if (parallelCapable_offset == -1) { 3100 // Default for backward compatibility is false 3101 return false; 3102 } 3103 return (class_loader->obj_field(parallelCapable_offset) != NULL); 3104 } 3105 3106 bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 3107 // Fix for 4474172; see evaluation for more details 3108 loader = non_reflection_class_loader(loader); 3109 3110 oop cl = SystemDictionary::java_system_loader(); 3111 while(cl != NULL) { 3112 if (cl == loader) return true; 3113 cl = parent(cl); 3114 } 3115 return false; 3116 } 3117 3118 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) { 3119 if (loader != NULL) { 3120 // See whether this is one of the class loaders associated with 3121 // the generated bytecodes for reflection, and if so, "magically" 3122 // delegate to its parent to prevent class loading from occurring 3123 // in places where applications using reflection didn't expect it. 3124 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass(); 3125 // This might be null in non-1.4 JDKs 3126 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) { 3127 return parent(loader); 3128 } 3129 } 3130 return loader; 3131 } 3132 3133 3134 // Support for java_lang_System 3135 int java_lang_System::in_offset_in_bytes() { 3136 return (InstanceMirrorKlass::offset_of_static_fields() + static_in_offset); 3137 } 3138 3139 3140 int java_lang_System::out_offset_in_bytes() { 3141 return (InstanceMirrorKlass::offset_of_static_fields() + static_out_offset); 3142 } 3143 3144 3145 int java_lang_System::err_offset_in_bytes() { 3146 return (InstanceMirrorKlass::offset_of_static_fields() + static_err_offset); 3147 } 3148 3149 3150 bool java_lang_System::has_security_manager() { 3151 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::System_klass()); 3152 address addr = ik->static_field_addr(static_security_offset); 3153 if (UseCompressedOops) { 3154 return oopDesc::load_decode_heap_oop((narrowOop *)addr) != NULL; 3155 } else { 3156 return oopDesc::load_decode_heap_oop((oop*)addr) != NULL; 3157 } 3158 } 3159 3160 int java_lang_Class::_klass_offset; 3161 int java_lang_Class::_array_klass_offset; 3162 int java_lang_Class::_oop_size_offset; 3163 int java_lang_Class::_static_oop_field_count_offset; 3164 int java_lang_Class::_class_loader_offset; 3165 int java_lang_Class::_protection_domain_offset; 3166 int java_lang_Class::_component_mirror_offset; 3167 int java_lang_Class::_init_lock_offset; 3168 int java_lang_Class::_signers_offset; 3169 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL; 3170 int java_lang_Throwable::backtrace_offset; 3171 int java_lang_Throwable::detailMessage_offset; 3172 int java_lang_Throwable::cause_offset; 3173 int java_lang_Throwable::stackTrace_offset; 3174 int java_lang_Throwable::static_unassigned_stacktrace_offset; 3175 int java_lang_reflect_AccessibleObject::override_offset; 3176 int java_lang_reflect_Method::clazz_offset; 3177 int java_lang_reflect_Method::name_offset; 3178 int java_lang_reflect_Method::returnType_offset; 3179 int java_lang_reflect_Method::parameterTypes_offset; 3180 int java_lang_reflect_Method::exceptionTypes_offset; 3181 int java_lang_reflect_Method::slot_offset; 3182 int java_lang_reflect_Method::modifiers_offset; 3183 int java_lang_reflect_Method::signature_offset; 3184 int java_lang_reflect_Method::annotations_offset; 3185 int java_lang_reflect_Method::parameter_annotations_offset; 3186 int java_lang_reflect_Method::annotation_default_offset; 3187 int java_lang_reflect_Method::type_annotations_offset; 3188 int java_lang_reflect_Constructor::clazz_offset; 3189 int java_lang_reflect_Constructor::parameterTypes_offset; 3190 int java_lang_reflect_Constructor::exceptionTypes_offset; 3191 int java_lang_reflect_Constructor::slot_offset; 3192 int java_lang_reflect_Constructor::modifiers_offset; 3193 int java_lang_reflect_Constructor::signature_offset; 3194 int java_lang_reflect_Constructor::annotations_offset; 3195 int java_lang_reflect_Constructor::parameter_annotations_offset; 3196 int java_lang_reflect_Constructor::type_annotations_offset; 3197 int java_lang_reflect_Field::clazz_offset; 3198 int java_lang_reflect_Field::name_offset; 3199 int java_lang_reflect_Field::type_offset; 3200 int java_lang_reflect_Field::slot_offset; 3201 int java_lang_reflect_Field::modifiers_offset; 3202 int java_lang_reflect_Field::signature_offset; 3203 int java_lang_reflect_Field::annotations_offset; 3204 int java_lang_reflect_Field::type_annotations_offset; 3205 int java_lang_reflect_Parameter::name_offset; 3206 int java_lang_reflect_Parameter::modifiers_offset; 3207 int java_lang_reflect_Parameter::index_offset; 3208 int java_lang_reflect_Parameter::executable_offset; 3209 int java_lang_boxing_object::value_offset; 3210 int java_lang_boxing_object::long_value_offset; 3211 int java_lang_ref_Reference::referent_offset; 3212 int java_lang_ref_Reference::queue_offset; 3213 int java_lang_ref_Reference::next_offset; 3214 int java_lang_ref_Reference::discovered_offset; 3215 int java_lang_ref_Reference::static_lock_offset; 3216 int java_lang_ref_Reference::static_pending_offset; 3217 int java_lang_ref_Reference::number_of_fake_oop_fields; 3218 int java_lang_ref_SoftReference::timestamp_offset; 3219 int java_lang_ref_SoftReference::static_clock_offset; 3220 int java_lang_ClassLoader::parent_offset; 3221 int java_lang_System::static_in_offset; 3222 int java_lang_System::static_out_offset; 3223 int java_lang_System::static_err_offset; 3224 int java_lang_System::static_security_offset; 3225 int java_lang_StackTraceElement::declaringClass_offset; 3226 int java_lang_StackTraceElement::methodName_offset; 3227 int java_lang_StackTraceElement::fileName_offset; 3228 int java_lang_StackTraceElement::lineNumber_offset; 3229 int java_lang_AssertionStatusDirectives::classes_offset; 3230 int java_lang_AssertionStatusDirectives::classEnabled_offset; 3231 int java_lang_AssertionStatusDirectives::packages_offset; 3232 int java_lang_AssertionStatusDirectives::packageEnabled_offset; 3233 int java_lang_AssertionStatusDirectives::deflt_offset; 3234 int java_nio_Buffer::_limit_offset; 3235 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0; 3236 int sun_reflect_ConstantPool::_oop_offset; 3237 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset; 3238 3239 3240 // Support for java_lang_StackTraceElement 3241 3242 void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 3243 element->obj_field_put(fileName_offset, value); 3244 } 3245 3246 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 3247 element->obj_field_put(declaringClass_offset, value); 3248 } 3249 3250 void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 3251 element->obj_field_put(methodName_offset, value); 3252 } 3253 3254 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 3255 element->int_field_put(lineNumber_offset, value); 3256 } 3257 3258 3259 // Support for java Assertions - java_lang_AssertionStatusDirectives. 3260 3261 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 3262 o->obj_field_put(classes_offset, val); 3263 } 3264 3265 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 3266 o->obj_field_put(classEnabled_offset, val); 3267 } 3268 3269 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 3270 o->obj_field_put(packages_offset, val); 3271 } 3272 3273 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 3274 o->obj_field_put(packageEnabled_offset, val); 3275 } 3276 3277 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 3278 o->bool_field_put(deflt_offset, val); 3279 } 3280 3281 3282 // Support for intrinsification of java.nio.Buffer.checkIndex 3283 int java_nio_Buffer::limit_offset() { 3284 return _limit_offset; 3285 } 3286 3287 3288 void java_nio_Buffer::compute_offsets() { 3289 Klass* k = SystemDictionary::nio_Buffer_klass(); 3290 assert(k != NULL, "must be loaded in 1.4+"); 3291 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature()); 3292 } 3293 3294 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) { 3295 if (_owner_offset != 0) return; 3296 3297 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK); 3298 Klass* k = SystemDictionary::abstract_ownable_synchronizer_klass(); 3299 compute_offset(_owner_offset, k, 3300 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature()); 3301 } 3302 3303 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 3304 assert(_owner_offset != 0, "Must be initialized"); 3305 return obj->obj_field(_owner_offset); 3306 } 3307 3308 // Compute hard-coded offsets 3309 // Invoked before SystemDictionary::initialize, so pre-loaded classes 3310 // are not available to determine the offset_of_static_fields. 3311 void JavaClasses::compute_hard_coded_offsets() { 3312 const int x = heapOopSize; 3313 const int header = instanceOopDesc::base_offset_in_bytes(); 3314 3315 // Throwable Class 3316 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header; 3317 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header; 3318 java_lang_Throwable::cause_offset = java_lang_Throwable::hc_cause_offset * x + header; 3319 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header; 3320 java_lang_Throwable::static_unassigned_stacktrace_offset = java_lang_Throwable::hc_static_unassigned_stacktrace_offset * x; 3321 3322 // java_lang_boxing_object 3323 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header; 3324 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong); 3325 3326 // java_lang_ref_Reference: 3327 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header; 3328 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header; 3329 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header; 3330 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header; 3331 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x; 3332 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x; 3333 // Artificial fields for java_lang_ref_Reference 3334 // The first field is for the discovered field added in 1.4 3335 java_lang_ref_Reference::number_of_fake_oop_fields = 1; 3336 3337 // java_lang_ref_SoftReference Class 3338 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong); 3339 // Don't multiply static fields because they are always in wordSize units 3340 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x; 3341 3342 // java_lang_ClassLoader 3343 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header; 3344 3345 // java_lang_System 3346 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x; 3347 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x; 3348 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x; 3349 java_lang_System::static_security_offset = java_lang_System::hc_static_security_offset * x; 3350 3351 // java_lang_StackTraceElement 3352 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header; 3353 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header; 3354 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header; 3355 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header; 3356 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header; 3357 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header; 3358 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header; 3359 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header; 3360 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header; 3361 3362 } 3363 3364 3365 // Compute non-hard-coded field offsets of all the classes in this file 3366 void JavaClasses::compute_offsets() { 3367 // java_lang_Class::compute_offsets was called earlier in bootstrap 3368 java_lang_ClassLoader::compute_offsets(); 3369 java_lang_Thread::compute_offsets(); 3370 java_lang_ThreadGroup::compute_offsets(); 3371 java_lang_invoke_MethodHandle::compute_offsets(); 3372 java_lang_invoke_DirectMethodHandle::compute_offsets(); 3373 java_lang_invoke_MemberName::compute_offsets(); 3374 java_lang_invoke_LambdaForm::compute_offsets(); 3375 java_lang_invoke_MethodType::compute_offsets(); 3376 java_lang_invoke_CallSite::compute_offsets(); 3377 java_security_AccessControlContext::compute_offsets(); 3378 // Initialize reflection classes. The layouts of these classes 3379 // changed with the new reflection implementation in JDK 1.4, and 3380 // since the Universe doesn't know what JDK version it is until this 3381 // point we defer computation of these offsets until now. 3382 java_lang_reflect_AccessibleObject::compute_offsets(); 3383 java_lang_reflect_Method::compute_offsets(); 3384 java_lang_reflect_Constructor::compute_offsets(); 3385 java_lang_reflect_Field::compute_offsets(); 3386 java_nio_Buffer::compute_offsets(); 3387 sun_reflect_ConstantPool::compute_offsets(); 3388 sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets(); 3389 java_lang_reflect_Parameter::compute_offsets(); 3390 3391 // generated interpreter code wants to know about the offsets we just computed: 3392 AbstractAssembler::update_delayed_values(); 3393 } 3394 3395 #ifndef PRODUCT 3396 3397 // These functions exist to assert the validity of hard-coded field offsets to guard 3398 // against changes in the class files 3399 3400 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 3401 EXCEPTION_MARK; 3402 fieldDescriptor fd; 3403 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3404 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3405 instanceKlassHandle h_klass (THREAD, k); 3406 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3407 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3408 if (!h_klass->find_local_field(f_name, f_sig, &fd)) { 3409 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 3410 return false; 3411 } 3412 if (fd.is_static()) { 3413 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 3414 return false; 3415 } 3416 if (fd.offset() == hardcoded_offset ) { 3417 return true; 3418 } else { 3419 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.", 3420 klass_name, field_name, hardcoded_offset, fd.offset()); 3421 return false; 3422 } 3423 } 3424 3425 3426 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 3427 EXCEPTION_MARK; 3428 fieldDescriptor fd; 3429 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3430 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3431 instanceKlassHandle h_klass (THREAD, k); 3432 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3433 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3434 if (!h_klass->find_local_field(f_name, f_sig, &fd)) { 3435 tty->print_cr("Static field %s.%s not found", klass_name, field_name); 3436 return false; 3437 } 3438 if (!fd.is_static()) { 3439 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name); 3440 return false; 3441 } 3442 if (fd.offset() == hardcoded_offset + InstanceMirrorKlass::offset_of_static_fields()) { 3443 return true; 3444 } else { 3445 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()); 3446 return false; 3447 } 3448 } 3449 3450 3451 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) { 3452 EXCEPTION_MARK; 3453 fieldDescriptor fd; 3454 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3455 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3456 instanceKlassHandle h_klass (THREAD, k); 3457 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3458 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3459 if (!h_klass->find_local_field(f_name, f_sig, &fd)) { 3460 tty->print_cr("Static field %s.%s not found", klass_name, field_name); 3461 return false; 3462 } 3463 if (!fd.is_static() || !fd.has_initial_value()) { 3464 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name); 3465 return false; 3466 } 3467 if (!fd.initial_value_tag().is_int()) { 3468 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name); 3469 return false; 3470 } 3471 jint field_value = fd.int_initial_value(); 3472 if (field_value == hardcoded_constant) { 3473 return true; 3474 } else { 3475 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); 3476 return false; 3477 } 3478 } 3479 3480 3481 // Check the hard-coded field offsets of all the classes in this file 3482 3483 void JavaClasses::check_offsets() { 3484 bool valid = true; 3485 HandleMark hm; 3486 3487 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3488 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig) 3489 3490 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3491 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig) 3492 3493 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3494 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig) 3495 3496 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \ 3497 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig) 3498 3499 // java.lang.String 3500 3501 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C"); 3502 if (java_lang_String::has_offset_field()) { 3503 CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I"); 3504 CHECK_OFFSET("java/lang/String", java_lang_String, count, "I"); 3505 } 3506 if (java_lang_String::has_hash_field()) { 3507 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I"); 3508 } 3509 3510 // java.lang.Class 3511 3512 // Fake fields 3513 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked 3514 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked 3515 3516 // java.lang.Throwable 3517 3518 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;"); 3519 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;"); 3520 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;"); 3521 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;"); 3522 3523 // Boxed primitive objects (java_lang_boxing_object) 3524 3525 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 3526 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 3527 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 3528 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 3529 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 3530 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 3531 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 3532 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 3533 3534 // java.lang.ClassLoader 3535 3536 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;"); 3537 3538 // java.lang.System 3539 3540 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;"); 3541 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;"); 3542 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;"); 3543 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, security, "Ljava/lang/SecurityManager;"); 3544 3545 // java.lang.StackTraceElement 3546 3547 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;"); 3548 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;"); 3549 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;"); 3550 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I"); 3551 3552 // java.lang.ref.Reference 3553 3554 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;"); 3555 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;"); 3556 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;"); 3557 // Fake field 3558 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;"); 3559 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;"); 3560 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;"); 3561 3562 // java.lang.ref.SoftReference 3563 3564 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J"); 3565 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J"); 3566 3567 // java.lang.AssertionStatusDirectives 3568 // 3569 // The CheckAssertionStatusDirectives boolean can be removed from here and 3570 // globals.hpp after the AssertionStatusDirectives class has been integrated 3571 // into merlin "for some time." Without it, the vm will fail with early 3572 // merlin builds. 3573 3574 if (CheckAssertionStatusDirectives) { 3575 const char* nm = "java/lang/AssertionStatusDirectives"; 3576 const char* sig = "[Ljava/lang/String;"; 3577 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig); 3578 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z"); 3579 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig); 3580 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z"); 3581 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z"); 3582 } 3583 3584 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed"); 3585 } 3586 3587 #endif // PRODUCT 3588 3589 int InjectedField::compute_offset() { 3590 Klass* klass_oop = klass(); 3591 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) { 3592 if (!may_be_java && !fs.access_flags().is_internal()) { 3593 // Only look at injected fields 3594 continue; 3595 } 3596 if (fs.name() == name() && fs.signature() == signature()) { 3597 return fs.offset(); 3598 } 3599 } 3600 ResourceMark rm; 3601 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)" : ""); 3602 #ifndef PRODUCT 3603 klass_oop->print(); 3604 tty->print_cr("all fields:"); 3605 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) { 3606 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 3607 } 3608 #endif //PRODUCT 3609 fatal("Invalid layout of preloaded class"); 3610 return -1; 3611 } 3612 3613 void javaClasses_init() { 3614 JavaClasses::compute_offsets(); 3615 JavaClasses::check_offsets(); 3616 FilteredFieldsMap::initialize(); // must be done after computing offsets. 3617 }