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.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/symbol.hpp" 43 #include "oops/typeArrayOop.hpp" 44 #include "runtime/fieldDescriptor.hpp" 45 #include "runtime/handles.inline.hpp" 46 #include "runtime/interfaceSupport.hpp" 47 #include "runtime/java.hpp" 48 #include "runtime/javaCalls.hpp" 49 #include "runtime/safepoint.hpp" 50 #include "runtime/thread.inline.hpp" 51 #include "runtime/vframe.hpp" 52 #include "utilities/preserveException.hpp" 53 54 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC 55 56 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \ 57 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum); 58 59 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \ 60 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java }, 61 62 InjectedField JavaClasses::_injected_fields[] = { 63 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD) 64 }; 65 66 int JavaClasses::compute_injected_offset(InjectedFieldID id) { 67 return _injected_fields[id].compute_offset(); 68 } 69 70 71 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) { 72 *field_count = 0; 73 74 vmSymbols::SID sid = vmSymbols::find_sid(class_name); 75 if (sid == vmSymbols::NO_SID) { 76 // Only well known classes can inject fields 77 return NULL; 78 } 79 80 int count = 0; 81 int start = -1; 82 83 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \ 84 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \ 85 count++; \ 86 if (start == -1) start = klass##_##name##_enum; \ 87 } 88 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD); 89 #undef LOOKUP_INJECTED_FIELD 90 91 if (start != -1) { 92 *field_count = count; 93 return _injected_fields + start; 94 } 95 return NULL; 96 } 97 98 99 static bool find_field(InstanceKlass* ik, 100 Symbol* name_symbol, Symbol* signature_symbol, 101 fieldDescriptor* fd, 102 bool allow_super = false) { 103 if (allow_super) 104 return ik->find_field(name_symbol, signature_symbol, fd) != NULL; 105 else 106 return ik->find_local_field(name_symbol, signature_symbol, fd); 107 } 108 109 // Helpful routine for computing field offsets at run time rather than hardcoding them 110 static void 111 compute_offset(int &dest_offset, 112 Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol, 113 bool allow_super = false) { 114 fieldDescriptor fd; 115 InstanceKlass* ik = InstanceKlass::cast(klass_oop); 116 if (!find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) { 117 ResourceMark rm; 118 tty->print_cr("Invalid layout of %s at %s sig %s", ik->external_name(), name_symbol->as_C_string(), signature_symbol->as_C_string()); 119 #ifndef PRODUCT 120 klass_oop->print(); 121 tty->print_cr("all fields:"); 122 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) { 123 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 124 } 125 #endif //PRODUCT 126 fatal("Invalid layout of preloaded class"); 127 } 128 dest_offset = fd.offset(); 129 } 130 131 // Same as above but for "optional" offsets that might not be present in certain JDK versions 132 static void 133 compute_optional_offset(int& dest_offset, 134 Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol, 135 bool allow_super = false) { 136 fieldDescriptor fd; 137 InstanceKlass* ik = InstanceKlass::cast(klass_oop); 138 if (find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) { 139 dest_offset = fd.offset(); 140 } 141 } 142 143 144 int java_lang_String::value_offset = 0; 145 int java_lang_String::offset_offset = 0; 146 int java_lang_String::count_offset = 0; 147 int java_lang_String::hash_offset = 0; 148 149 bool java_lang_String::initialized = false; 150 151 void java_lang_String::compute_offsets() { 152 assert(!initialized, "offsets should be initialized only once"); 153 154 Klass* k = SystemDictionary::String_klass(); 155 compute_offset(value_offset, k, vmSymbols::value_name(), vmSymbols::char_array_signature()); 156 compute_optional_offset(offset_offset, k, vmSymbols::offset_name(), vmSymbols::int_signature()); 157 compute_optional_offset(count_offset, k, vmSymbols::count_name(), vmSymbols::int_signature()); 158 compute_optional_offset(hash_offset, k, vmSymbols::hash_name(), vmSymbols::int_signature()); 159 160 initialized = true; 161 } 162 163 Handle java_lang_String::basic_create(int length, TRAPS) { 164 assert(initialized, "Must be initialized"); 165 // Create the String object first, so there's a chance that the String 166 // and the char array it points to end up in the same cache line. 167 oop obj; 168 obj = InstanceKlass::cast(SystemDictionary::String_klass())->allocate_instance(CHECK_NH); 169 170 // Create the char array. The String object must be handlized here 171 // because GC can happen as a result of the allocation attempt. 172 Handle h_obj(THREAD, obj); 173 typeArrayOop buffer; 174 buffer = oopFactory::new_charArray(length, CHECK_NH); 175 176 // Point the String at the char array 177 obj = h_obj(); 178 set_value(obj, buffer); 179 // No need to zero the offset, allocation zero'ed the entire String object 180 assert(offset(obj) == 0, "initial String offset should be zero"); 181 //set_offset(obj, 0); 182 set_count(obj, length); 183 184 return h_obj; 185 } 186 187 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) { 188 Handle h_obj = basic_create(length, CHECK_NH); 189 typeArrayOop buffer = value(h_obj()); 190 for (int index = 0; index < length; index++) { 191 buffer->char_at_put(index, unicode[index]); 192 } 193 return h_obj; 194 } 195 196 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) { 197 Handle h_obj = create_from_unicode(unicode, length, CHECK_0); 198 return h_obj(); 199 } 200 201 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) { 202 if (utf8_str == NULL) { 203 return Handle(); 204 } 205 int length = UTF8::unicode_length(utf8_str); 206 Handle h_obj = basic_create(length, CHECK_NH); 207 if (length > 0) { 208 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 209 } 210 return h_obj; 211 } 212 213 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) { 214 Handle h_obj = create_from_str(utf8_str, CHECK_0); 215 return h_obj(); 216 } 217 218 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) { 219 int length = UTF8::unicode_length((char*)symbol->bytes(), symbol->utf8_length()); 220 Handle h_obj = basic_create(length, CHECK_NH); 221 if (length > 0) { 222 UTF8::convert_to_unicode((char*)symbol->bytes(), value(h_obj())->char_at_addr(0), length); 223 } 224 return h_obj; 225 } 226 227 // Converts a C string to a Java String based on current encoding 228 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) { 229 assert(str != NULL, "bad arguments"); 230 231 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *); 232 static to_java_string_fn_t _to_java_string_fn = NULL; 233 234 if (_to_java_string_fn == NULL) { 235 void *lib_handle = os::native_java_library(); 236 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform")); 237 if (_to_java_string_fn == NULL) { 238 fatal("NewStringPlatform missing"); 239 } 240 } 241 242 jstring js = NULL; 243 { JavaThread* thread = (JavaThread*)THREAD; 244 assert(thread->is_Java_thread(), "must be java thread"); 245 HandleMark hm(thread); 246 ThreadToNativeFromVM ttn(thread); 247 js = (_to_java_string_fn)(thread->jni_environment(), str); 248 } 249 return Handle(THREAD, JNIHandles::resolve(js)); 250 } 251 252 // Converts a Java String to a native C string that can be used for 253 // native OS calls. 254 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) { 255 256 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*); 257 static to_platform_string_fn_t _to_platform_string_fn = NULL; 258 259 if (_to_platform_string_fn == NULL) { 260 void *lib_handle = os::native_java_library(); 261 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars")); 262 if (_to_platform_string_fn == NULL) { 263 fatal("GetStringPlatformChars missing"); 264 } 265 } 266 267 char *native_platform_string; 268 { JavaThread* thread = (JavaThread*)THREAD; 269 assert(thread->is_Java_thread(), "must be java thread"); 270 JNIEnv *env = thread->jni_environment(); 271 jstring js = (jstring) JNIHandles::make_local(env, java_string()); 272 bool is_copy; 273 HandleMark hm(thread); 274 ThreadToNativeFromVM ttn(thread); 275 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy); 276 assert(is_copy == JNI_TRUE, "is_copy value changed"); 277 JNIHandles::destroy_local(js); 278 } 279 return native_platform_string; 280 } 281 282 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) { 283 oop obj = java_string(); 284 // Typical usage is to convert all '/' to '.' in string. 285 typeArrayOop value = java_lang_String::value(obj); 286 int offset = java_lang_String::offset(obj); 287 int length = java_lang_String::length(obj); 288 289 // First check if any from_char exist 290 int index; // Declared outside, used later 291 for (index = 0; index < length; index++) { 292 if (value->char_at(index + offset) == from_char) { 293 break; 294 } 295 } 296 if (index == length) { 297 // No from_char, so do not copy. 298 return java_string; 299 } 300 301 // Create new UNICODE buffer. Must handlize value because GC 302 // may happen during String and char array creation. 303 typeArrayHandle h_value(THREAD, value); 304 Handle string = basic_create(length, CHECK_NH); 305 306 typeArrayOop from_buffer = h_value(); 307 typeArrayOop to_buffer = java_lang_String::value(string()); 308 309 // Copy contents 310 for (index = 0; index < length; index++) { 311 jchar c = from_buffer->char_at(index + offset); 312 if (c == from_char) { 313 c = to_char; 314 } 315 to_buffer->char_at_put(index, c); 316 } 317 return string; 318 } 319 320 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) { 321 typeArrayOop value = java_lang_String::value(java_string); 322 int offset = java_lang_String::offset(java_string); 323 length = java_lang_String::length(java_string); 324 325 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length); 326 if (result != NULL) { 327 for (int index = 0; index < length; index++) { 328 result[index] = value->char_at(index + offset); 329 } 330 } else { 331 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string"); 332 } 333 return result; 334 } 335 336 unsigned int java_lang_String::hash_code(oop java_string) { 337 int length = java_lang_String::length(java_string); 338 // Zero length string will hash to zero with String.hashCode() function. 339 if (length == 0) return 0; 340 341 typeArrayOop value = java_lang_String::value(java_string); 342 int offset = java_lang_String::offset(java_string); 343 return java_lang_String::hash_code(value->char_at_addr(offset), length); 344 } 345 346 char* java_lang_String::as_quoted_ascii(oop java_string) { 347 typeArrayOop value = java_lang_String::value(java_string); 348 int offset = java_lang_String::offset(java_string); 349 int length = java_lang_String::length(java_string); 350 351 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset); 352 if (base == NULL) return NULL; 353 354 int result_length = UNICODE::quoted_ascii_length(base, length) + 1; 355 char* result = NEW_RESOURCE_ARRAY(char, result_length); 356 UNICODE::as_quoted_ascii(base, length, result, result_length); 357 assert(result_length >= length + 1, "must not be shorter"); 358 assert(result_length == (int)strlen(result) + 1, "must match"); 359 return result; 360 } 361 362 unsigned int java_lang_String::hash_string(oop java_string) { 363 int length = java_lang_String::length(java_string); 364 // Zero length string doesn't hash necessarily hash to zero. 365 if (length == 0) { 366 return StringTable::hash_string(NULL, 0); 367 } 368 369 typeArrayOop value = java_lang_String::value(java_string); 370 int offset = java_lang_String::offset(java_string); 371 return StringTable::hash_string(value->char_at_addr(offset), length); 372 } 373 374 Symbol* java_lang_String::as_symbol(Handle java_string, TRAPS) { 375 oop obj = java_string(); 376 typeArrayOop value = java_lang_String::value(obj); 377 int offset = java_lang_String::offset(obj); 378 int length = java_lang_String::length(obj); 379 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset); 380 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD); 381 return sym; 382 } 383 384 Symbol* java_lang_String::as_symbol_or_null(oop java_string) { 385 typeArrayOop value = java_lang_String::value(java_string); 386 int offset = java_lang_String::offset(java_string); 387 int length = java_lang_String::length(java_string); 388 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset); 389 return SymbolTable::probe_unicode(base, length); 390 } 391 392 393 int java_lang_String::utf8_length(oop java_string) { 394 typeArrayOop value = java_lang_String::value(java_string); 395 int offset = java_lang_String::offset(java_string); 396 int length = java_lang_String::length(java_string); 397 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset); 398 return UNICODE::utf8_length(position, length); 399 } 400 401 char* java_lang_String::as_utf8_string(oop java_string) { 402 typeArrayOop value = java_lang_String::value(java_string); 403 int offset = java_lang_String::offset(java_string); 404 int length = java_lang_String::length(java_string); 405 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset); 406 return UNICODE::as_utf8(position, length); 407 } 408 409 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) { 410 typeArrayOop value = java_lang_String::value(java_string); 411 int offset = java_lang_String::offset(java_string); 412 int length = java_lang_String::length(java_string); 413 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset); 414 return UNICODE::as_utf8(position, length, buf, buflen); 415 } 416 417 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) { 418 typeArrayOop value = java_lang_String::value(java_string); 419 int offset = java_lang_String::offset(java_string); 420 int length = java_lang_String::length(java_string); 421 assert(start + len <= length, "just checking"); 422 jchar* position = value->char_at_addr(offset + start); 423 return UNICODE::as_utf8(position, len); 424 } 425 426 char* java_lang_String::as_utf8_string(oop java_string, int start, int len, char* buf, int buflen) { 427 typeArrayOop value = java_lang_String::value(java_string); 428 int offset = java_lang_String::offset(java_string); 429 int length = java_lang_String::length(java_string); 430 assert(start + len <= length, "just checking"); 431 jchar* position = value->char_at_addr(offset + start); 432 return UNICODE::as_utf8(position, len, buf, buflen); 433 } 434 435 bool java_lang_String::equals(oop java_string, jchar* chars, int len) { 436 assert(java_string->klass() == SystemDictionary::String_klass(), 437 "must be java_string"); 438 typeArrayOop value = java_lang_String::value(java_string); 439 int offset = java_lang_String::offset(java_string); 440 int length = java_lang_String::length(java_string); 441 if (length != len) { 442 return false; 443 } 444 for (int i = 0; i < len; i++) { 445 if (value->char_at(i + offset) != chars[i]) { 446 return false; 447 } 448 } 449 return true; 450 } 451 452 bool java_lang_String::equals(oop str1, oop str2) { 453 assert(str1->klass() == SystemDictionary::String_klass(), 454 "must be java String"); 455 assert(str2->klass() == SystemDictionary::String_klass(), 456 "must be java String"); 457 typeArrayOop value1 = java_lang_String::value(str1); 458 int offset1 = java_lang_String::offset(str1); 459 int length1 = java_lang_String::length(str1); 460 typeArrayOop value2 = java_lang_String::value(str2); 461 int offset2 = java_lang_String::offset(str2); 462 int length2 = java_lang_String::length(str2); 463 464 if (length1 != length2) { 465 return false; 466 } 467 for (int i = 0; i < length1; i++) { 468 if (value1->char_at(i + offset1) != value2->char_at(i + offset2)) { 469 return false; 470 } 471 } 472 return true; 473 } 474 475 void java_lang_String::print(oop java_string, outputStream* st) { 476 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string"); 477 typeArrayOop value = java_lang_String::value(java_string); 478 479 if (value == NULL) { 480 // This can happen if, e.g., printing a String 481 // object before its initializer has been called 482 st->print("NULL"); 483 return; 484 } 485 486 int offset = java_lang_String::offset(java_string); 487 int length = java_lang_String::length(java_string); 488 489 st->print("\""); 490 for (int index = 0; index < length; index++) { 491 st->print("%c", value->char_at(index + offset)); 492 } 493 st->print("\""); 494 } 495 496 497 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 498 assert(mirror.not_null() && fd->is_static(), "just checking"); 499 if (fd->has_initial_value()) { 500 BasicType t = fd->field_type(); 501 switch (t) { 502 case T_BYTE: 503 mirror()->byte_field_put(fd->offset(), fd->int_initial_value()); 504 break; 505 case T_BOOLEAN: 506 mirror()->bool_field_put(fd->offset(), fd->int_initial_value()); 507 break; 508 case T_CHAR: 509 mirror()->char_field_put(fd->offset(), fd->int_initial_value()); 510 break; 511 case T_SHORT: 512 mirror()->short_field_put(fd->offset(), fd->int_initial_value()); 513 break; 514 case T_INT: 515 mirror()->int_field_put(fd->offset(), fd->int_initial_value()); 516 break; 517 case T_FLOAT: 518 mirror()->float_field_put(fd->offset(), fd->float_initial_value()); 519 break; 520 case T_DOUBLE: 521 mirror()->double_field_put(fd->offset(), fd->double_initial_value()); 522 break; 523 case T_LONG: 524 mirror()->long_field_put(fd->offset(), fd->long_initial_value()); 525 break; 526 case T_OBJECT: 527 { 528 #ifdef ASSERT 529 TempNewSymbol sym = SymbolTable::new_symbol("Ljava/lang/String;", CHECK); 530 assert(fd->signature() == sym, "just checking"); 531 #endif 532 oop string = fd->string_initial_value(CHECK); 533 mirror()->obj_field_put(fd->offset(), string); 534 } 535 break; 536 default: 537 THROW_MSG(vmSymbols::java_lang_ClassFormatError(), 538 "Illegal ConstantValue attribute in class file"); 539 } 540 } 541 } 542 543 544 void java_lang_Class::fixup_mirror(KlassHandle k, TRAPS) { 545 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already"); 546 547 // If the offset was read from the shared archive, it was fixed up already 548 if (!k->is_shared()) { 549 if (k->oop_is_instance()) { 550 // During bootstrap, java.lang.Class wasn't loaded so static field 551 // offsets were computed without the size added it. Go back and 552 // update all the static field offsets to included the size. 553 for (JavaFieldStream fs(InstanceKlass::cast(k())); !fs.done(); fs.next()) { 554 if (fs.access_flags().is_static()) { 555 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields(); 556 fs.set_offset(real_offset); 557 } 558 } 559 } 560 } 561 create_mirror(k, Handle(NULL), Handle(NULL), CHECK); 562 } 563 564 void java_lang_Class::initialize_mirror_fields(KlassHandle k, 565 Handle mirror, 566 Handle protection_domain, 567 TRAPS) { 568 // Allocate a simple java object for a lock. 569 // This needs to be a java object because during class initialization 570 // it can be held across a java call. 571 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK); 572 set_init_lock(mirror(), r); 573 574 // Set protection domain also 575 set_protection_domain(mirror(), protection_domain()); 576 577 // Initialize static fields 578 InstanceKlass::cast(k())->do_local_static_fields(&initialize_static_field, mirror, CHECK); 579 } 580 581 void java_lang_Class::create_mirror(KlassHandle k, Handle class_loader, 582 Handle protection_domain, TRAPS) { 583 assert(k->java_mirror() == NULL, "should only assign mirror once"); 584 // Use this moment of initialization to cache modifier_flags also, 585 // to support Class.getModifiers(). Instance classes recalculate 586 // the cached flags after the class file is parsed, but before the 587 // class is put into the system dictionary. 588 int computed_modifiers = k->compute_modifier_flags(CHECK); 589 k->set_modifier_flags(computed_modifiers); 590 // Class_klass has to be loaded because it is used to allocate 591 // the mirror. 592 if (SystemDictionary::Class_klass_loaded()) { 593 // Allocate mirror (java.lang.Class instance) 594 Handle mirror = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK); 595 596 // Setup indirection from mirror->klass 597 if (!k.is_null()) { 598 java_lang_Class::set_klass(mirror(), k()); 599 } 600 601 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass()); 602 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set"); 603 604 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror())); 605 606 // It might also have a component mirror. This mirror must already exist. 607 if (k->oop_is_array()) { 608 Handle comp_mirror; 609 if (k->oop_is_typeArray()) { 610 BasicType type = TypeArrayKlass::cast(k())->element_type(); 611 comp_mirror = Universe::java_mirror(type); 612 } else { 613 assert(k->oop_is_objArray(), "Must be"); 614 Klass* element_klass = ObjArrayKlass::cast(k())->element_klass(); 615 assert(element_klass != NULL, "Must have an element klass"); 616 comp_mirror = element_klass->java_mirror(); 617 } 618 assert(comp_mirror.not_null(), "must have a mirror"); 619 620 // Two-way link between the array klass and its component mirror: 621 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k 622 set_component_mirror(mirror(), comp_mirror()); 623 set_array_klass(comp_mirror(), k()); 624 } else { 625 assert(k->oop_is_instance(), "Must be"); 626 627 initialize_mirror_fields(k, mirror, protection_domain, THREAD); 628 if (HAS_PENDING_EXCEPTION) { 629 // If any of the fields throws an exception like OOM remove the klass field 630 // from the mirror so GC doesn't follow it after the klass has been deallocated. 631 // This mirror looks like a primitive type, which logically it is because it 632 // it represents no class. 633 java_lang_Class::set_klass(mirror(), NULL); 634 return; 635 } 636 } 637 638 // set the classLoader field in the java_lang_Class instance 639 assert(class_loader() == k->class_loader(), "should be same"); 640 set_class_loader(mirror(), class_loader()); 641 642 // Setup indirection from klass->mirror last 643 // after any exceptions can happen during allocations. 644 if (!k.is_null()) { 645 k->set_java_mirror(mirror()); 646 } 647 } else { 648 if (fixup_mirror_list() == NULL) { 649 GrowableArray<Klass*>* list = 650 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true); 651 set_fixup_mirror_list(list); 652 } 653 fixup_mirror_list()->push(k()); 654 } 655 } 656 657 658 int java_lang_Class::oop_size(oop java_class) { 659 assert(_oop_size_offset != 0, "must be set"); 660 return java_class->int_field(_oop_size_offset); 661 } 662 void java_lang_Class::set_oop_size(oop java_class, int size) { 663 assert(_oop_size_offset != 0, "must be set"); 664 java_class->int_field_put(_oop_size_offset, size); 665 } 666 int java_lang_Class::static_oop_field_count(oop java_class) { 667 assert(_static_oop_field_count_offset != 0, "must be set"); 668 return java_class->int_field(_static_oop_field_count_offset); 669 } 670 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) { 671 assert(_static_oop_field_count_offset != 0, "must be set"); 672 java_class->int_field_put(_static_oop_field_count_offset, size); 673 } 674 675 oop java_lang_Class::protection_domain(oop java_class) { 676 assert(_protection_domain_offset != 0, "must be set"); 677 return java_class->obj_field(_protection_domain_offset); 678 } 679 void java_lang_Class::set_protection_domain(oop java_class, oop pd) { 680 assert(_protection_domain_offset != 0, "must be set"); 681 java_class->obj_field_put(_protection_domain_offset, pd); 682 } 683 684 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) { 685 assert(_component_mirror_offset != 0, "must be set"); 686 java_class->obj_field_put(_component_mirror_offset, comp_mirror); 687 } 688 oop java_lang_Class::component_mirror(oop java_class) { 689 assert(_component_mirror_offset != 0, "must be set"); 690 return java_class->obj_field(_component_mirror_offset); 691 } 692 693 oop java_lang_Class::init_lock(oop java_class) { 694 assert(_init_lock_offset != 0, "must be set"); 695 return java_class->obj_field(_init_lock_offset); 696 } 697 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) { 698 assert(_init_lock_offset != 0, "must be set"); 699 java_class->obj_field_put(_init_lock_offset, init_lock); 700 } 701 702 objArrayOop java_lang_Class::signers(oop java_class) { 703 assert(_signers_offset != 0, "must be set"); 704 return (objArrayOop)java_class->obj_field(_signers_offset); 705 } 706 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) { 707 assert(_signers_offset != 0, "must be set"); 708 java_class->obj_field_put(_signers_offset, (oop)signers); 709 } 710 711 712 void java_lang_Class::set_class_loader(oop java_class, oop loader) { 713 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet. 714 if (_class_loader_offset != 0) { 715 java_class->obj_field_put(_class_loader_offset, loader); 716 } 717 } 718 719 oop java_lang_Class::class_loader(oop java_class) { 720 assert(_class_loader_offset != 0, "must be set"); 721 return java_class->obj_field(_class_loader_offset); 722 } 723 724 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) { 725 // This should be improved by adding a field at the Java level or by 726 // introducing a new VM klass (see comment in ClassFileParser) 727 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0); 728 if (type != T_VOID) { 729 Klass* aklass = Universe::typeArrayKlassObj(type); 730 assert(aklass != NULL, "correct bootstrap"); 731 set_array_klass(java_class, aklass); 732 } 733 #ifdef ASSERT 734 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass()); 735 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation"); 736 #endif 737 return java_class; 738 } 739 740 741 Klass* java_lang_Class::as_Klass(oop java_class) { 742 //%note memory_2 743 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 744 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset)); 745 assert(k == NULL || k->is_klass(), "type check"); 746 return k; 747 } 748 749 750 void java_lang_Class::set_klass(oop java_class, Klass* klass) { 751 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 752 java_class->metadata_field_put(_klass_offset, klass); 753 } 754 755 756 void java_lang_Class::print_signature(oop java_class, outputStream* st) { 757 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 758 Symbol* name = NULL; 759 bool is_instance = false; 760 if (is_primitive(java_class)) { 761 name = vmSymbols::type_signature(primitive_type(java_class)); 762 } else { 763 Klass* k = as_Klass(java_class); 764 is_instance = k->oop_is_instance(); 765 name = k->name(); 766 } 767 if (name == NULL) { 768 st->print("<null>"); 769 return; 770 } 771 if (is_instance) st->print("L"); 772 st->write((char*) name->base(), (int) name->utf8_length()); 773 if (is_instance) st->print(";"); 774 } 775 776 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) { 777 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 778 Symbol* name; 779 if (is_primitive(java_class)) { 780 name = vmSymbols::type_signature(primitive_type(java_class)); 781 // Because this can create a new symbol, the caller has to decrement 782 // the refcount, so make adjustment here and below for symbols returned 783 // that are not created or incremented due to a successful lookup. 784 name->increment_refcount(); 785 } else { 786 Klass* k = as_Klass(java_class); 787 if (!k->oop_is_instance()) { 788 name = k->name(); 789 name->increment_refcount(); 790 } else { 791 ResourceMark rm; 792 const char* sigstr = k->signature_name(); 793 int siglen = (int) strlen(sigstr); 794 if (!intern_if_not_found) { 795 name = SymbolTable::probe(sigstr, siglen); 796 } else { 797 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 798 } 799 } 800 } 801 return name; 802 } 803 804 805 Klass* java_lang_Class::array_klass(oop java_class) { 806 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset)); 807 assert(k == NULL || k->is_klass() && k->oop_is_array(), "should be array klass"); 808 return k; 809 } 810 811 812 void java_lang_Class::set_array_klass(oop java_class, Klass* klass) { 813 assert(klass->is_klass() && klass->oop_is_array(), "should be array klass"); 814 java_class->metadata_field_put(_array_klass_offset, klass); 815 } 816 817 818 bool java_lang_Class::is_primitive(oop java_class) { 819 // should assert: 820 //assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 821 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL); 822 823 #ifdef ASSERT 824 if (is_primitive) { 825 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset)); 826 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()), 827 "Should be either the T_VOID primitive or a java primitive"); 828 } 829 #endif 830 831 return is_primitive; 832 } 833 834 835 BasicType java_lang_Class::primitive_type(oop java_class) { 836 assert(java_lang_Class::is_primitive(java_class), "just checking"); 837 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset)); 838 BasicType type = T_VOID; 839 if (ak != NULL) { 840 // Note: create_basic_type_mirror above initializes ak to a non-null value. 841 type = ArrayKlass::cast(ak)->element_type(); 842 } else { 843 assert(java_class == Universe::void_mirror(), "only valid non-array primitive"); 844 } 845 assert(Universe::java_mirror(type) == java_class, "must be consistent"); 846 return type; 847 } 848 849 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) { 850 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 851 if (is_primitive(java_class)) { 852 if (reference_klass != NULL) 853 (*reference_klass) = NULL; 854 return primitive_type(java_class); 855 } else { 856 if (reference_klass != NULL) 857 (*reference_klass) = as_Klass(java_class); 858 return T_OBJECT; 859 } 860 } 861 862 863 oop java_lang_Class::primitive_mirror(BasicType t) { 864 oop mirror = Universe::java_mirror(t); 865 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class"); 866 assert(java_lang_Class::is_primitive(mirror), "must be primitive"); 867 return mirror; 868 } 869 870 bool java_lang_Class::offsets_computed = false; 871 int java_lang_Class::classRedefinedCount_offset = -1; 872 873 void java_lang_Class::compute_offsets() { 874 assert(!offsets_computed, "offsets should be initialized only once"); 875 offsets_computed = true; 876 877 Thread* THREAD = Thread::current(); 878 Klass* k = SystemDictionary::Class_klass(); 879 compute_offset(_classData_offset, k, vmSymbols::classData_name(), vmSymbols::object_signature()); 880 // The classRedefinedCount field is only present starting in 1.5, 881 // so don't go fatal. 882 compute_optional_offset(classRedefinedCount_offset, k, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature()); 883 884 // Needs to be optional because the old build runs Queens during bootstrapping 885 // and jdk8-9 doesn't have coordinated pushes yet. 886 compute_optional_offset(_class_loader_offset, 887 k, vmSymbols::classLoader_name(), 888 vmSymbols::classloader_signature()); 889 890 compute_offset(_component_mirror_offset, 891 k, vmSymbols::componentType_name(), 892 vmSymbols::class_signature()); 893 894 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have 895 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops 896 // GC treats them the same. 897 _init_lock_offset = _component_mirror_offset; 898 899 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 900 } 901 902 oop java_lang_Class::classData(oop obj) { 903 return obj->obj_field_volatile(_classData_offset); 904 } 905 906 int java_lang_Class::classRedefinedCount(oop the_class_mirror) { 907 if (classRedefinedCount_offset == -1) { 908 // If we don't have an offset for it then just return -1 as a marker. 909 return -1; 910 } 911 912 return the_class_mirror->int_field(classRedefinedCount_offset); 913 } 914 915 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) { 916 if (classRedefinedCount_offset == -1) { 917 // If we don't have an offset for it then nothing to set. 918 return; 919 } 920 921 the_class_mirror->int_field_put(classRedefinedCount_offset, value); 922 } 923 924 int java_lang_invoke_MemberName_ClassData::_publishedToVM_offset; 925 926 void java_lang_invoke_MemberName_ClassData::compute_offsets() { 927 Thread* THREAD = Thread::current(); 928 Klass* k = SystemDictionary::MemberName_ClassData_klass(); 929 compute_offset(_publishedToVM_offset, k, vmSymbols::publishedToVM_name(), vmSymbols::java_lang_invoke_MemberName_signature()); 930 } 931 932 bool java_lang_invoke_MemberName_ClassData::is_instance(oop obj) { 933 return obj != NULL && obj->klass() == SystemDictionary::MemberName_ClassData_klass(); 934 } 935 936 oop java_lang_invoke_MemberName_ClassData::publishedToVM(oop obj) { 937 assert(is_instance(obj), err_msg("%s", obj == NULL ? "null" : obj->klass()->external_name())); 938 return obj->obj_field(_publishedToVM_offset); 939 } 940 941 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the 942 // platform thread structure, and a eetop offset which was used for thread 943 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures 944 // merged, so in the HotSpot VM we just use the eetop field for the thread 945 // instead of the privateInfo_offset. 946 // 947 // Note: The stackSize field is only present starting in 1.4. 948 949 int java_lang_Thread::_name_offset = 0; 950 int java_lang_Thread::_group_offset = 0; 951 int java_lang_Thread::_contextClassLoader_offset = 0; 952 int java_lang_Thread::_inheritedAccessControlContext_offset = 0; 953 int java_lang_Thread::_priority_offset = 0; 954 int java_lang_Thread::_eetop_offset = 0; 955 int java_lang_Thread::_daemon_offset = 0; 956 int java_lang_Thread::_stillborn_offset = 0; 957 int java_lang_Thread::_stackSize_offset = 0; 958 int java_lang_Thread::_tid_offset = 0; 959 int java_lang_Thread::_thread_status_offset = 0; 960 int java_lang_Thread::_park_blocker_offset = 0; 961 int java_lang_Thread::_park_event_offset = 0 ; 962 963 964 void java_lang_Thread::compute_offsets() { 965 assert(_group_offset == 0, "offsets should be initialized only once"); 966 967 Klass* k = SystemDictionary::Thread_klass(); 968 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::char_array_signature()); 969 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature()); 970 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature()); 971 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature()); 972 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature()); 973 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature()); 974 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature()); 975 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature()); 976 // The stackSize field is only present starting in 1.4, so don't go fatal. 977 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature()); 978 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal. 979 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature()); 980 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature()); 981 // The parkBlocker field is only present starting in 1.6, so don't go fatal. 982 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature()); 983 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(), 984 vmSymbols::long_signature()); 985 } 986 987 988 JavaThread* java_lang_Thread::thread(oop java_thread) { 989 return (JavaThread*)java_thread->address_field(_eetop_offset); 990 } 991 992 993 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) { 994 java_thread->address_field_put(_eetop_offset, (address)thread); 995 } 996 997 998 typeArrayOop java_lang_Thread::name(oop java_thread) { 999 oop name = java_thread->obj_field(_name_offset); 1000 assert(name == NULL || (name->is_typeArray() && TypeArrayKlass::cast(name->klass())->element_type() == T_CHAR), "just checking"); 1001 return typeArrayOop(name); 1002 } 1003 1004 1005 void java_lang_Thread::set_name(oop java_thread, typeArrayOop name) { 1006 assert(java_thread->obj_field(_name_offset) == NULL, "name should be NULL"); 1007 java_thread->obj_field_put(_name_offset, name); 1008 } 1009 1010 1011 ThreadPriority java_lang_Thread::priority(oop java_thread) { 1012 return (ThreadPriority)java_thread->int_field(_priority_offset); 1013 } 1014 1015 1016 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) { 1017 java_thread->int_field_put(_priority_offset, priority); 1018 } 1019 1020 1021 oop java_lang_Thread::threadGroup(oop java_thread) { 1022 return java_thread->obj_field(_group_offset); 1023 } 1024 1025 1026 bool java_lang_Thread::is_stillborn(oop java_thread) { 1027 return java_thread->bool_field(_stillborn_offset) != 0; 1028 } 1029 1030 1031 // We never have reason to turn the stillborn bit off 1032 void java_lang_Thread::set_stillborn(oop java_thread) { 1033 java_thread->bool_field_put(_stillborn_offset, true); 1034 } 1035 1036 1037 bool java_lang_Thread::is_alive(oop java_thread) { 1038 JavaThread* thr = java_lang_Thread::thread(java_thread); 1039 return (thr != NULL); 1040 } 1041 1042 1043 bool java_lang_Thread::is_daemon(oop java_thread) { 1044 return java_thread->bool_field(_daemon_offset) != 0; 1045 } 1046 1047 1048 void java_lang_Thread::set_daemon(oop java_thread) { 1049 java_thread->bool_field_put(_daemon_offset, true); 1050 } 1051 1052 oop java_lang_Thread::context_class_loader(oop java_thread) { 1053 return java_thread->obj_field(_contextClassLoader_offset); 1054 } 1055 1056 oop java_lang_Thread::inherited_access_control_context(oop java_thread) { 1057 return java_thread->obj_field(_inheritedAccessControlContext_offset); 1058 } 1059 1060 1061 jlong java_lang_Thread::stackSize(oop java_thread) { 1062 if (_stackSize_offset > 0) { 1063 return java_thread->long_field(_stackSize_offset); 1064 } else { 1065 return 0; 1066 } 1067 } 1068 1069 // Write the thread status value to threadStatus field in java.lang.Thread java class. 1070 void java_lang_Thread::set_thread_status(oop java_thread, 1071 java_lang_Thread::ThreadStatus status) { 1072 // The threadStatus is only present starting in 1.5 1073 if (_thread_status_offset > 0) { 1074 java_thread->int_field_put(_thread_status_offset, status); 1075 } 1076 } 1077 1078 // Read thread status value from threadStatus field in java.lang.Thread java class. 1079 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) { 1080 assert(Thread::current()->is_Watcher_thread() || Thread::current()->is_VM_thread() || 1081 JavaThread::current()->thread_state() == _thread_in_vm, 1082 "Java Thread is not running in vm"); 1083 // The threadStatus is only present starting in 1.5 1084 if (_thread_status_offset > 0) { 1085 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1086 } else { 1087 // All we can easily figure out is if it is alive, but that is 1088 // enough info for a valid unknown status. 1089 // These aren't restricted to valid set ThreadStatus values, so 1090 // use JVMTI values and cast. 1091 JavaThread* thr = java_lang_Thread::thread(java_thread); 1092 if (thr == NULL) { 1093 // the thread hasn't run yet or is in the process of exiting 1094 return NEW; 1095 } 1096 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE; 1097 } 1098 } 1099 1100 1101 jlong java_lang_Thread::thread_id(oop java_thread) { 1102 // The thread ID field is only present starting in 1.5 1103 if (_tid_offset > 0) { 1104 return java_thread->long_field(_tid_offset); 1105 } else { 1106 return 0; 1107 } 1108 } 1109 1110 oop java_lang_Thread::park_blocker(oop java_thread) { 1111 assert(JDK_Version::current().supports_thread_park_blocker() && 1112 _park_blocker_offset != 0, "Must support parkBlocker field"); 1113 1114 if (_park_blocker_offset > 0) { 1115 return java_thread->obj_field(_park_blocker_offset); 1116 } 1117 1118 return NULL; 1119 } 1120 1121 jlong java_lang_Thread::park_event(oop java_thread) { 1122 if (_park_event_offset > 0) { 1123 return java_thread->long_field(_park_event_offset); 1124 } 1125 return 0; 1126 } 1127 1128 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) { 1129 if (_park_event_offset > 0) { 1130 java_thread->long_field_put(_park_event_offset, ptr); 1131 return true; 1132 } 1133 return false; 1134 } 1135 1136 1137 const char* java_lang_Thread::thread_status_name(oop java_thread) { 1138 assert(_thread_status_offset != 0, "Must have thread status"); 1139 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1140 switch (status) { 1141 case NEW : return "NEW"; 1142 case RUNNABLE : return "RUNNABLE"; 1143 case SLEEPING : return "TIMED_WAITING (sleeping)"; 1144 case IN_OBJECT_WAIT : return "WAITING (on object monitor)"; 1145 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)"; 1146 case PARKED : return "WAITING (parking)"; 1147 case PARKED_TIMED : return "TIMED_WAITING (parking)"; 1148 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)"; 1149 case TERMINATED : return "TERMINATED"; 1150 default : return "UNKNOWN"; 1151 }; 1152 } 1153 int java_lang_ThreadGroup::_parent_offset = 0; 1154 int java_lang_ThreadGroup::_name_offset = 0; 1155 int java_lang_ThreadGroup::_threads_offset = 0; 1156 int java_lang_ThreadGroup::_groups_offset = 0; 1157 int java_lang_ThreadGroup::_maxPriority_offset = 0; 1158 int java_lang_ThreadGroup::_destroyed_offset = 0; 1159 int java_lang_ThreadGroup::_daemon_offset = 0; 1160 int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0; 1161 int java_lang_ThreadGroup::_nthreads_offset = 0; 1162 int java_lang_ThreadGroup::_ngroups_offset = 0; 1163 1164 oop java_lang_ThreadGroup::parent(oop java_thread_group) { 1165 assert(java_thread_group->is_oop(), "thread group must be oop"); 1166 return java_thread_group->obj_field(_parent_offset); 1167 } 1168 1169 // ("name as oop" accessor is not necessary) 1170 1171 typeArrayOop java_lang_ThreadGroup::name(oop java_thread_group) { 1172 oop name = java_thread_group->obj_field(_name_offset); 1173 // ThreadGroup.name can be null 1174 return name == NULL ? (typeArrayOop)NULL : java_lang_String::value(name); 1175 } 1176 1177 int java_lang_ThreadGroup::nthreads(oop java_thread_group) { 1178 assert(java_thread_group->is_oop(), "thread group must be oop"); 1179 return java_thread_group->int_field(_nthreads_offset); 1180 } 1181 1182 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) { 1183 oop threads = java_thread_group->obj_field(_threads_offset); 1184 assert(threads != NULL, "threadgroups should have threads"); 1185 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code 1186 return objArrayOop(threads); 1187 } 1188 1189 int java_lang_ThreadGroup::ngroups(oop java_thread_group) { 1190 assert(java_thread_group->is_oop(), "thread group must be oop"); 1191 return java_thread_group->int_field(_ngroups_offset); 1192 } 1193 1194 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) { 1195 oop groups = java_thread_group->obj_field(_groups_offset); 1196 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code 1197 return objArrayOop(groups); 1198 } 1199 1200 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) { 1201 assert(java_thread_group->is_oop(), "thread group must be oop"); 1202 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset); 1203 } 1204 1205 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) { 1206 assert(java_thread_group->is_oop(), "thread group must be oop"); 1207 return java_thread_group->bool_field(_destroyed_offset) != 0; 1208 } 1209 1210 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) { 1211 assert(java_thread_group->is_oop(), "thread group must be oop"); 1212 return java_thread_group->bool_field(_daemon_offset) != 0; 1213 } 1214 1215 bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) { 1216 assert(java_thread_group->is_oop(), "thread group must be oop"); 1217 return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0; 1218 } 1219 1220 void java_lang_ThreadGroup::compute_offsets() { 1221 assert(_parent_offset == 0, "offsets should be initialized only once"); 1222 1223 Klass* k = SystemDictionary::ThreadGroup_klass(); 1224 1225 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature()); 1226 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1227 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature()); 1228 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature()); 1229 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature()); 1230 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature()); 1231 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature()); 1232 compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature()); 1233 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature()); 1234 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature()); 1235 } 1236 1237 oop java_lang_Throwable::unassigned_stacktrace() { 1238 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Throwable_klass()); 1239 address addr = ik->static_field_addr(static_unassigned_stacktrace_offset); 1240 if (UseCompressedOops) { 1241 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 1242 } else { 1243 return oopDesc::load_decode_heap_oop((oop*)addr); 1244 } 1245 } 1246 1247 oop java_lang_Throwable::backtrace(oop throwable) { 1248 return throwable->obj_field_acquire(backtrace_offset); 1249 } 1250 1251 1252 void java_lang_Throwable::set_backtrace(oop throwable, oop value) { 1253 throwable->release_obj_field_put(backtrace_offset, value); 1254 } 1255 1256 1257 oop java_lang_Throwable::message(oop throwable) { 1258 return throwable->obj_field(detailMessage_offset); 1259 } 1260 1261 1262 oop java_lang_Throwable::message(Handle throwable) { 1263 return throwable->obj_field(detailMessage_offset); 1264 } 1265 1266 1267 // Return Symbol for detailed_message or NULL 1268 Symbol* java_lang_Throwable::detail_message(oop throwable) { 1269 PRESERVE_EXCEPTION_MARK; // Keep original exception 1270 oop detailed_message = java_lang_Throwable::message(throwable); 1271 if (detailed_message != NULL) { 1272 return java_lang_String::as_symbol(detailed_message, THREAD); 1273 } 1274 return NULL; 1275 } 1276 1277 void java_lang_Throwable::set_message(oop throwable, oop value) { 1278 throwable->obj_field_put(detailMessage_offset, value); 1279 } 1280 1281 1282 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) { 1283 throwable->obj_field_put(stackTrace_offset, st_element_array); 1284 } 1285 1286 void java_lang_Throwable::clear_stacktrace(oop throwable) { 1287 set_stacktrace(throwable, NULL); 1288 } 1289 1290 1291 void java_lang_Throwable::print(oop throwable, outputStream* st) { 1292 ResourceMark rm; 1293 Klass* k = throwable->klass(); 1294 assert(k != NULL, "just checking"); 1295 st->print("%s", InstanceKlass::cast(k)->external_name()); 1296 oop msg = message(throwable); 1297 if (msg != NULL) { 1298 st->print(": %s", java_lang_String::as_utf8_string(msg)); 1299 } 1300 } 1301 1302 1303 void java_lang_Throwable::print(Handle throwable, outputStream* st) { 1304 ResourceMark rm; 1305 Klass* k = throwable->klass(); 1306 assert(k != NULL, "just checking"); 1307 st->print("%s", InstanceKlass::cast(k)->external_name()); 1308 oop msg = message(throwable); 1309 if (msg != NULL) { 1310 st->print(": %s", java_lang_String::as_utf8_string(msg)); 1311 } 1312 } 1313 1314 // After this many redefines, the stack trace is unreliable. 1315 const int MAX_VERSION = USHRT_MAX; 1316 1317 // Helper backtrace functions to store bci|version together. 1318 static inline int merge_bci_and_version(int bci, int version) { 1319 // only store u2 for version, checking for overflow. 1320 if (version > USHRT_MAX || version < 0) version = MAX_VERSION; 1321 assert((jushort)bci == bci, "bci should be short"); 1322 return build_int_from_shorts(version, bci); 1323 } 1324 1325 static inline int bci_at(unsigned int merged) { 1326 return extract_high_short_from_int(merged); 1327 } 1328 static inline int version_at(unsigned int merged) { 1329 return extract_low_short_from_int(merged); 1330 } 1331 1332 static inline bool version_matches(Method* method, int version) { 1333 return (method->constants()->version() == version && version < MAX_VERSION); 1334 } 1335 1336 static inline int get_line_number(Method* method, int bci) { 1337 int line_number = 0; 1338 if (method->is_native()) { 1339 // Negative value different from -1 below, enabling Java code in 1340 // class java.lang.StackTraceElement to distinguish "native" from 1341 // "no LineNumberTable". JDK tests for -2. 1342 line_number = -2; 1343 } else { 1344 // Returns -1 if no LineNumberTable, and otherwise actual line number 1345 line_number = method->line_number_from_bci(bci); 1346 if (line_number == -1 && ShowHiddenFrames) { 1347 line_number = bci + 1000000; 1348 } 1349 } 1350 return line_number; 1351 } 1352 1353 // This class provides a simple wrapper over the internal structure of 1354 // exception backtrace to insulate users of the backtrace from needing 1355 // to know what it looks like. 1356 class BacktraceBuilder: public StackObj { 1357 private: 1358 Handle _backtrace; 1359 objArrayOop _head; 1360 typeArrayOop _methods; 1361 typeArrayOop _bcis; 1362 objArrayOop _mirrors; 1363 int _index; 1364 No_Safepoint_Verifier _nsv; 1365 1366 public: 1367 1368 enum { 1369 trace_methods_offset = java_lang_Throwable::trace_methods_offset, 1370 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset, 1371 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset, 1372 trace_next_offset = java_lang_Throwable::trace_next_offset, 1373 trace_size = java_lang_Throwable::trace_size, 1374 trace_chunk_size = java_lang_Throwable::trace_chunk_size 1375 }; 1376 1377 // get info out of chunks 1378 static typeArrayOop get_methods(objArrayHandle chunk) { 1379 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset)); 1380 assert(methods != NULL, "method array should be initialized in backtrace"); 1381 return methods; 1382 } 1383 static typeArrayOop get_bcis(objArrayHandle chunk) { 1384 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 1385 assert(bcis != NULL, "bci array should be initialized in backtrace"); 1386 return bcis; 1387 } 1388 static objArrayOop get_mirrors(objArrayHandle chunk) { 1389 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset)); 1390 assert(mirrors != NULL, "mirror array should be initialized in backtrace"); 1391 return mirrors; 1392 } 1393 1394 // constructor for new backtrace 1395 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL) { 1396 expand(CHECK); 1397 _backtrace = _head; 1398 _index = 0; 1399 } 1400 1401 BacktraceBuilder(objArrayHandle backtrace) { 1402 _methods = get_methods(backtrace); 1403 _bcis = get_bcis(backtrace); 1404 _mirrors = get_mirrors(backtrace); 1405 assert(_methods->length() == _bcis->length() && 1406 _methods->length() == _mirrors->length(), 1407 "method and source information arrays should match"); 1408 1409 // head is the preallocated backtrace 1410 _backtrace = _head = backtrace(); 1411 _index = 0; 1412 } 1413 1414 void expand(TRAPS) { 1415 objArrayHandle old_head(THREAD, _head); 1416 Pause_No_Safepoint_Verifier pnsv(&_nsv); 1417 1418 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK); 1419 objArrayHandle new_head(THREAD, head); 1420 1421 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK); 1422 typeArrayHandle new_methods(THREAD, methods); 1423 1424 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK); 1425 typeArrayHandle new_bcis(THREAD, bcis); 1426 1427 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK); 1428 objArrayHandle new_mirrors(THREAD, mirrors); 1429 1430 if (!old_head.is_null()) { 1431 old_head->obj_at_put(trace_next_offset, new_head()); 1432 } 1433 new_head->obj_at_put(trace_methods_offset, new_methods()); 1434 new_head->obj_at_put(trace_bcis_offset, new_bcis()); 1435 new_head->obj_at_put(trace_mirrors_offset, new_mirrors()); 1436 1437 _head = new_head(); 1438 _methods = new_methods(); 1439 _bcis = new_bcis(); 1440 _mirrors = new_mirrors(); 1441 _index = 0; 1442 } 1443 1444 oop backtrace() { 1445 return _backtrace(); 1446 } 1447 1448 inline void push(Method* method, int bci, TRAPS) { 1449 // Smear the -1 bci to 0 since the array only holds unsigned 1450 // shorts. The later line number lookup would just smear the -1 1451 // to a 0 even if it could be recorded. 1452 if (bci == SynchronizationEntryBCI) bci = 0; 1453 1454 if (_index >= trace_chunk_size) { 1455 methodHandle mhandle(THREAD, method); 1456 expand(CHECK); 1457 method = mhandle(); 1458 } 1459 1460 _methods->short_at_put(_index, method->method_idnum()); 1461 _bcis->int_at_put(_index, merge_bci_and_version(bci, method->constants()->version())); 1462 1463 // We need to save the mirrors in the backtrace to keep the class 1464 // from being unloaded while we still have this stack trace. 1465 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror"); 1466 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror()); 1467 _index++; 1468 } 1469 1470 }; 1471 1472 // Print stack trace element to resource allocated buffer 1473 char* java_lang_Throwable::print_stack_element_to_buffer(Handle mirror, 1474 int method_id, int version, int bci) { 1475 1476 // Get strings and string lengths 1477 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 1478 const char* klass_name = holder->external_name(); 1479 int buf_len = (int)strlen(klass_name); 1480 1481 // The method id may point to an obsolete method, can't get more stack information 1482 Method* method = holder->method_with_idnum(method_id); 1483 if (method == NULL) { 1484 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64); 1485 // This is what the java code prints in this case - added Redefined 1486 sprintf(buf, "\tat %s.null (Redefined)", klass_name); 1487 return buf; 1488 } 1489 1490 char* method_name = method->name()->as_C_string(); 1491 buf_len += (int)strlen(method_name); 1492 1493 char* source_file_name = NULL; 1494 if (version_matches(method, version)) { 1495 Symbol* source = holder->source_file_name(); 1496 if (source != NULL) { 1497 source_file_name = source->as_C_string(); 1498 buf_len += (int)strlen(source_file_name); 1499 } 1500 } 1501 1502 // Allocate temporary buffer with extra space for formatting and line number 1503 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64); 1504 1505 // Print stack trace line in buffer 1506 sprintf(buf, "\tat %s.%s", klass_name, method_name); 1507 1508 if (!version_matches(method, version)) { 1509 strcat(buf, "(Redefined)"); 1510 } else { 1511 int line_number = get_line_number(method, bci); 1512 if (line_number == -2) { 1513 strcat(buf, "(Native Method)"); 1514 } else { 1515 if (source_file_name != NULL && (line_number != -1)) { 1516 // Sourcename and linenumber 1517 sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number); 1518 } else if (source_file_name != NULL) { 1519 // Just sourcename 1520 sprintf(buf + (int)strlen(buf), "(%s)", source_file_name); 1521 } else { 1522 // Neither sourcename nor linenumber 1523 sprintf(buf + (int)strlen(buf), "(Unknown Source)"); 1524 } 1525 nmethod* nm = method->code(); 1526 if (WizardMode && nm != NULL) { 1527 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm); 1528 } 1529 } 1530 } 1531 1532 return buf; 1533 } 1534 1535 void java_lang_Throwable::print_stack_element(outputStream *st, Handle mirror, 1536 int method_id, int version, int bci) { 1537 ResourceMark rm; 1538 char* buf = print_stack_element_to_buffer(mirror, method_id, version, bci); 1539 st->print_cr("%s", buf); 1540 } 1541 1542 void java_lang_Throwable::print_stack_element(outputStream *st, methodHandle method, int bci) { 1543 Handle mirror = method->method_holder()->java_mirror(); 1544 int method_id = method->method_idnum(); 1545 int version = method->constants()->version(); 1546 print_stack_element(st, mirror, method_id, version, bci); 1547 } 1548 1549 const char* java_lang_Throwable::no_stack_trace_message() { 1550 return "\t<<no stack trace available>>"; 1551 } 1552 1553 1554 // Currently used only for exceptions occurring during startup 1555 void java_lang_Throwable::print_stack_trace(oop throwable, outputStream* st) { 1556 Thread *THREAD = Thread::current(); 1557 Handle h_throwable(THREAD, throwable); 1558 while (h_throwable.not_null()) { 1559 objArrayHandle result (THREAD, objArrayOop(backtrace(h_throwable()))); 1560 if (result.is_null()) { 1561 st->print_cr("%s", no_stack_trace_message()); 1562 return; 1563 } 1564 1565 while (result.not_null()) { 1566 1567 // Get method id, bci, version and mirror from chunk 1568 typeArrayHandle methods (THREAD, BacktraceBuilder::get_methods(result)); 1569 typeArrayHandle bcis (THREAD, BacktraceBuilder::get_bcis(result)); 1570 objArrayHandle mirrors (THREAD, BacktraceBuilder::get_mirrors(result)); 1571 1572 int length = methods()->length(); 1573 for (int index = 0; index < length; index++) { 1574 Handle mirror(THREAD, mirrors->obj_at(index)); 1575 // NULL mirror means end of stack trace 1576 if (mirror.is_null()) goto handle_cause; 1577 int method = methods->short_at(index); 1578 int version = version_at(bcis->int_at(index)); 1579 int bci = bci_at(bcis->int_at(index)); 1580 print_stack_element(st, mirror, method, version, bci); 1581 } 1582 result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset))); 1583 } 1584 handle_cause: 1585 { 1586 EXCEPTION_MARK; 1587 JavaValue cause(T_OBJECT); 1588 JavaCalls::call_virtual(&cause, 1589 h_throwable, 1590 KlassHandle(THREAD, h_throwable->klass()), 1591 vmSymbols::getCause_name(), 1592 vmSymbols::void_throwable_signature(), 1593 THREAD); 1594 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 1595 if (HAS_PENDING_EXCEPTION) { 1596 CLEAR_PENDING_EXCEPTION; 1597 h_throwable = Handle(); 1598 } else { 1599 h_throwable = Handle(THREAD, (oop) cause.get_jobject()); 1600 if (h_throwable.not_null()) { 1601 st->print("Caused by: "); 1602 print(h_throwable, st); 1603 st->cr(); 1604 } 1605 } 1606 } 1607 } 1608 } 1609 1610 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS) { 1611 if (!StackTraceInThrowable) return; 1612 ResourceMark rm(THREAD); 1613 1614 // Start out by clearing the backtrace for this object, in case the VM 1615 // runs out of memory while allocating the stack trace 1616 set_backtrace(throwable(), NULL); 1617 // Clear lazily constructed Java level stacktrace if refilling occurs 1618 // This is unnecessary in 1.7+ but harmless 1619 clear_stacktrace(throwable()); 1620 1621 int max_depth = MaxJavaStackTraceDepth; 1622 JavaThread* thread = (JavaThread*)THREAD; 1623 BacktraceBuilder bt(CHECK); 1624 1625 // If there is no Java frame just return the method that was being called 1626 // with bci 0 1627 if (!thread->has_last_Java_frame()) { 1628 if (max_depth >= 1 && method() != NULL) { 1629 bt.push(method(), 0, CHECK); 1630 set_backtrace(throwable(), bt.backtrace()); 1631 } 1632 return; 1633 } 1634 1635 // Instead of using vframe directly, this version of fill_in_stack_trace 1636 // basically handles everything by hand. This significantly improved the 1637 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows. 1638 // See bug 6333838 for more details. 1639 // The "ASSERT" here is to verify this method generates the exactly same stack 1640 // trace as utilizing vframe. 1641 #ifdef ASSERT 1642 vframeStream st(thread); 1643 methodHandle st_method(THREAD, st.method()); 1644 #endif 1645 int total_count = 0; 1646 RegisterMap map(thread, false); 1647 int decode_offset = 0; 1648 nmethod* nm = NULL; 1649 bool skip_fillInStackTrace_check = false; 1650 bool skip_throwableInit_check = false; 1651 bool skip_hidden = !ShowHiddenFrames; 1652 1653 for (frame fr = thread->last_frame(); max_depth != total_count;) { 1654 Method* method = NULL; 1655 int bci = 0; 1656 1657 // Compiled java method case. 1658 if (decode_offset != 0) { 1659 DebugInfoReadStream stream(nm, decode_offset); 1660 decode_offset = stream.read_int(); 1661 method = (Method*)nm->metadata_at(stream.read_int()); 1662 bci = stream.read_bci(); 1663 } else { 1664 if (fr.is_first_frame()) break; 1665 address pc = fr.pc(); 1666 if (fr.is_interpreted_frame()) { 1667 address bcp = fr.interpreter_frame_bcp(); 1668 method = fr.interpreter_frame_method(); 1669 bci = method->bci_from(bcp); 1670 fr = fr.sender(&map); 1671 } else { 1672 CodeBlob* cb = fr.cb(); 1673 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL 1674 // but non nmethod 1675 fr = fr.sender(&map); 1676 if (cb == NULL || !cb->is_nmethod()) { 1677 continue; 1678 } 1679 nm = (nmethod*)cb; 1680 if (nm->method()->is_native()) { 1681 method = nm->method(); 1682 bci = 0; 1683 } else { 1684 PcDesc* pd = nm->pc_desc_at(pc); 1685 decode_offset = pd->scope_decode_offset(); 1686 // if decode_offset is not equal to 0, it will execute the 1687 // "compiled java method case" at the beginning of the loop. 1688 continue; 1689 } 1690 } 1691 } 1692 #ifdef ASSERT 1693 assert(st_method() == method && st.bci() == bci, 1694 "Wrong stack trace"); 1695 st.next(); 1696 // vframeStream::method isn't GC-safe so store off a copy 1697 // of the Method* in case we GC. 1698 if (!st.at_end()) { 1699 st_method = st.method(); 1700 } 1701 #endif 1702 1703 // the format of the stacktrace will be: 1704 // - 1 or more fillInStackTrace frames for the exception class (skipped) 1705 // - 0 or more <init> methods for the exception class (skipped) 1706 // - rest of the stack 1707 1708 if (!skip_fillInStackTrace_check) { 1709 if ((method->name() == vmSymbols::fillInStackTrace_name() || 1710 method->name() == vmSymbols::fillInStackTrace0_name()) && 1711 throwable->is_a(method->method_holder())) { 1712 continue; 1713 } 1714 else { 1715 skip_fillInStackTrace_check = true; // gone past them all 1716 } 1717 } 1718 if (!skip_throwableInit_check) { 1719 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering"); 1720 1721 // skip <init> methods of the exception class and superclasses 1722 // This is simlar to classic VM. 1723 if (method->name() == vmSymbols::object_initializer_name() && 1724 throwable->is_a(method->method_holder())) { 1725 continue; 1726 } else { 1727 // there are none or we've seen them all - either way stop checking 1728 skip_throwableInit_check = true; 1729 } 1730 } 1731 if (method->is_hidden()) { 1732 if (skip_hidden) continue; 1733 } 1734 bt.push(method, bci, CHECK); 1735 total_count++; 1736 } 1737 1738 // Put completed stack trace into throwable object 1739 set_backtrace(throwable(), bt.backtrace()); 1740 } 1741 1742 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method) { 1743 // No-op if stack trace is disabled 1744 if (!StackTraceInThrowable) { 1745 return; 1746 } 1747 1748 // Disable stack traces for some preallocated out of memory errors 1749 if (!Universe::should_fill_in_stack_trace(throwable)) { 1750 return; 1751 } 1752 1753 PRESERVE_EXCEPTION_MARK; 1754 1755 JavaThread* thread = JavaThread::active(); 1756 fill_in_stack_trace(throwable, method, thread); 1757 // ignore exceptions thrown during stack trace filling 1758 CLEAR_PENDING_EXCEPTION; 1759 } 1760 1761 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 1762 // Allocate stack trace - backtrace is created but not filled in 1763 1764 // No-op if stack trace is disabled 1765 if (!StackTraceInThrowable) return; 1766 BacktraceBuilder bt(CHECK); // creates a backtrace 1767 set_backtrace(throwable(), bt.backtrace()); 1768 } 1769 1770 1771 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 1772 // Fill in stack trace into preallocated backtrace (no GC) 1773 1774 // No-op if stack trace is disabled 1775 if (!StackTraceInThrowable) return; 1776 1777 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check"); 1778 1779 JavaThread* THREAD = JavaThread::current(); 1780 1781 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable())); 1782 assert(backtrace.not_null(), "backtrace should have been preallocated"); 1783 1784 ResourceMark rm(THREAD); 1785 vframeStream st(THREAD); 1786 1787 BacktraceBuilder bt(backtrace); 1788 1789 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 1790 // methods as preallocated errors aren't created by "java" code. 1791 1792 // fill in as much stack trace as possible 1793 typeArrayOop methods = BacktraceBuilder::get_methods(backtrace); 1794 int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth); 1795 int chunk_count = 0; 1796 1797 for (;!st.at_end(); st.next()) { 1798 bt.push(st.method(), st.bci(), CHECK); 1799 chunk_count++; 1800 1801 // Bail-out for deep stacks 1802 if (chunk_count >= max_chunks) break; 1803 } 1804 1805 // We support the Throwable immutability protocol defined for Java 7. 1806 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace()); 1807 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized"); 1808 } 1809 1810 1811 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) { 1812 if (throwable == NULL) { 1813 THROW_0(vmSymbols::java_lang_NullPointerException()); 1814 } 1815 objArrayOop chunk = objArrayOop(backtrace(throwable)); 1816 int depth = 0; 1817 if (chunk != NULL) { 1818 // Iterate over chunks and count full ones 1819 while (true) { 1820 objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset)); 1821 if (next == NULL) break; 1822 depth += trace_chunk_size; 1823 chunk = next; 1824 } 1825 assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check"); 1826 // Count element in remaining partial chunk. NULL value for mirror 1827 // marks the end of the stack trace elements that are saved. 1828 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk); 1829 assert(mirrors != NULL, "sanity check"); 1830 for (int i = 0; i < mirrors->length(); i++) { 1831 if (mirrors->obj_at(i) == NULL) break; 1832 depth++; 1833 } 1834 } 1835 return depth; 1836 } 1837 1838 1839 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) { 1840 if (throwable == NULL) { 1841 THROW_0(vmSymbols::java_lang_NullPointerException()); 1842 } 1843 if (index < 0) { 1844 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 1845 } 1846 // Compute how many chunks to skip and index into actual chunk 1847 objArrayOop chunk = objArrayOop(backtrace(throwable)); 1848 int skip_chunks = index / trace_chunk_size; 1849 int chunk_index = index % trace_chunk_size; 1850 while (chunk != NULL && skip_chunks > 0) { 1851 chunk = objArrayOop(chunk->obj_at(trace_next_offset)); 1852 skip_chunks--; 1853 } 1854 if (chunk == NULL) { 1855 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 1856 } 1857 // Get method id, bci, version and mirror from chunk 1858 typeArrayOop methods = BacktraceBuilder::get_methods(chunk); 1859 typeArrayOop bcis = BacktraceBuilder::get_bcis(chunk); 1860 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk); 1861 1862 assert(methods != NULL && bcis != NULL && mirrors != NULL, "sanity check"); 1863 1864 int method = methods->short_at(chunk_index); 1865 int version = version_at(bcis->int_at(chunk_index)); 1866 int bci = bci_at(bcis->int_at(chunk_index)); 1867 Handle mirror(THREAD, mirrors->obj_at(chunk_index)); 1868 1869 // Chunk can be partial full 1870 if (mirror.is_null()) { 1871 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 1872 } 1873 1874 oop element = java_lang_StackTraceElement::create(mirror, method, version, bci, CHECK_0); 1875 return element; 1876 } 1877 1878 oop java_lang_StackTraceElement::create(Handle mirror, int method_id, 1879 int version, int bci, TRAPS) { 1880 // Allocate java.lang.StackTraceElement instance 1881 Klass* k = SystemDictionary::StackTraceElement_klass(); 1882 assert(k != NULL, "must be loaded in 1.4+"); 1883 instanceKlassHandle ik (THREAD, k); 1884 if (ik->should_be_initialized()) { 1885 ik->initialize(CHECK_0); 1886 } 1887 1888 Handle element = ik->allocate_instance_handle(CHECK_0); 1889 // Fill in class name 1890 ResourceMark rm(THREAD); 1891 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 1892 const char* str = holder->external_name(); 1893 oop classname = StringTable::intern((char*) str, CHECK_0); 1894 java_lang_StackTraceElement::set_declaringClass(element(), classname); 1895 1896 Method* method = holder->method_with_idnum(method_id); 1897 // Method on stack may be obsolete because it was redefined so cannot be 1898 // found by idnum. 1899 if (method == NULL) { 1900 // leave name and fileName null 1901 java_lang_StackTraceElement::set_lineNumber(element(), -1); 1902 return element(); 1903 } 1904 1905 // Fill in method name 1906 oop methodname = StringTable::intern(method->name(), CHECK_0); 1907 java_lang_StackTraceElement::set_methodName(element(), methodname); 1908 1909 if (!version_matches(method, version)) { 1910 // The method was redefined, accurate line number information isn't available 1911 java_lang_StackTraceElement::set_fileName(element(), NULL); 1912 java_lang_StackTraceElement::set_lineNumber(element(), -1); 1913 } else { 1914 // Fill in source file name and line number. 1915 Symbol* source = holder->source_file_name(); 1916 if (ShowHiddenFrames && source == NULL) 1917 source = vmSymbols::unknown_class_name(); 1918 oop filename = StringTable::intern(source, CHECK_0); 1919 java_lang_StackTraceElement::set_fileName(element(), filename); 1920 1921 int line_number = get_line_number(method, bci); 1922 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 1923 } 1924 return element(); 1925 } 1926 1927 oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) { 1928 Handle mirror (THREAD, method->method_holder()->java_mirror()); 1929 int method_id = method->method_idnum(); 1930 return create(mirror, method_id, method->constants()->version(), bci, THREAD); 1931 } 1932 1933 void java_lang_reflect_AccessibleObject::compute_offsets() { 1934 Klass* k = SystemDictionary::reflect_AccessibleObject_klass(); 1935 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature()); 1936 } 1937 1938 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 1939 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1940 return (jboolean) reflect->bool_field(override_offset); 1941 } 1942 1943 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 1944 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1945 reflect->bool_field_put(override_offset, (int) value); 1946 } 1947 1948 void java_lang_reflect_Method::compute_offsets() { 1949 Klass* k = SystemDictionary::reflect_Method_klass(); 1950 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 1951 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1952 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature()); 1953 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 1954 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 1955 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 1956 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 1957 // The generic signature and annotations fields are only present in 1.5 1958 signature_offset = -1; 1959 annotations_offset = -1; 1960 parameter_annotations_offset = -1; 1961 annotation_default_offset = -1; 1962 type_annotations_offset = -1; 1963 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 1964 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 1965 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 1966 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature()); 1967 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 1968 } 1969 1970 Handle java_lang_reflect_Method::create(TRAPS) { 1971 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1972 Klass* klass = SystemDictionary::reflect_Method_klass(); 1973 // This class is eagerly initialized during VM initialization, since we keep a refence 1974 // to one of the methods 1975 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized"); 1976 return InstanceKlass::cast(klass)->allocate_instance_handle(CHECK_NH); 1977 } 1978 1979 oop java_lang_reflect_Method::clazz(oop reflect) { 1980 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1981 return reflect->obj_field(clazz_offset); 1982 } 1983 1984 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 1985 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1986 reflect->obj_field_put(clazz_offset, value); 1987 } 1988 1989 int java_lang_reflect_Method::slot(oop reflect) { 1990 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1991 return reflect->int_field(slot_offset); 1992 } 1993 1994 void java_lang_reflect_Method::set_slot(oop reflect, int value) { 1995 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1996 reflect->int_field_put(slot_offset, value); 1997 } 1998 1999 oop java_lang_reflect_Method::name(oop method) { 2000 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2001 return method->obj_field(name_offset); 2002 } 2003 2004 void java_lang_reflect_Method::set_name(oop method, oop value) { 2005 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2006 method->obj_field_put(name_offset, value); 2007 } 2008 2009 oop java_lang_reflect_Method::return_type(oop method) { 2010 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2011 return method->obj_field(returnType_offset); 2012 } 2013 2014 void java_lang_reflect_Method::set_return_type(oop method, oop value) { 2015 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2016 method->obj_field_put(returnType_offset, value); 2017 } 2018 2019 oop java_lang_reflect_Method::parameter_types(oop method) { 2020 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2021 return method->obj_field(parameterTypes_offset); 2022 } 2023 2024 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 2025 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2026 method->obj_field_put(parameterTypes_offset, value); 2027 } 2028 2029 oop java_lang_reflect_Method::exception_types(oop method) { 2030 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2031 return method->obj_field(exceptionTypes_offset); 2032 } 2033 2034 void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 2035 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2036 method->obj_field_put(exceptionTypes_offset, value); 2037 } 2038 2039 int java_lang_reflect_Method::modifiers(oop method) { 2040 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2041 return method->int_field(modifiers_offset); 2042 } 2043 2044 void java_lang_reflect_Method::set_modifiers(oop method, int value) { 2045 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2046 method->int_field_put(modifiers_offset, value); 2047 } 2048 2049 bool java_lang_reflect_Method::has_signature_field() { 2050 return (signature_offset >= 0); 2051 } 2052 2053 oop java_lang_reflect_Method::signature(oop method) { 2054 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2055 assert(has_signature_field(), "signature field must be present"); 2056 return method->obj_field(signature_offset); 2057 } 2058 2059 void java_lang_reflect_Method::set_signature(oop method, oop value) { 2060 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2061 assert(has_signature_field(), "signature field must be present"); 2062 method->obj_field_put(signature_offset, value); 2063 } 2064 2065 bool java_lang_reflect_Method::has_annotations_field() { 2066 return (annotations_offset >= 0); 2067 } 2068 2069 oop java_lang_reflect_Method::annotations(oop method) { 2070 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2071 assert(has_annotations_field(), "annotations field must be present"); 2072 return method->obj_field(annotations_offset); 2073 } 2074 2075 void java_lang_reflect_Method::set_annotations(oop method, oop value) { 2076 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2077 assert(has_annotations_field(), "annotations field must be present"); 2078 method->obj_field_put(annotations_offset, value); 2079 } 2080 2081 bool java_lang_reflect_Method::has_parameter_annotations_field() { 2082 return (parameter_annotations_offset >= 0); 2083 } 2084 2085 oop java_lang_reflect_Method::parameter_annotations(oop method) { 2086 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2087 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2088 return method->obj_field(parameter_annotations_offset); 2089 } 2090 2091 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 2092 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2093 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2094 method->obj_field_put(parameter_annotations_offset, value); 2095 } 2096 2097 bool java_lang_reflect_Method::has_annotation_default_field() { 2098 return (annotation_default_offset >= 0); 2099 } 2100 2101 oop java_lang_reflect_Method::annotation_default(oop method) { 2102 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2103 assert(has_annotation_default_field(), "annotation default field must be present"); 2104 return method->obj_field(annotation_default_offset); 2105 } 2106 2107 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 2108 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2109 assert(has_annotation_default_field(), "annotation default field must be present"); 2110 method->obj_field_put(annotation_default_offset, value); 2111 } 2112 2113 bool java_lang_reflect_Method::has_type_annotations_field() { 2114 return (type_annotations_offset >= 0); 2115 } 2116 2117 oop java_lang_reflect_Method::type_annotations(oop method) { 2118 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2119 assert(has_type_annotations_field(), "type_annotations field must be present"); 2120 return method->obj_field(type_annotations_offset); 2121 } 2122 2123 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) { 2124 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2125 assert(has_type_annotations_field(), "type_annotations field must be present"); 2126 method->obj_field_put(type_annotations_offset, value); 2127 } 2128 2129 void java_lang_reflect_Constructor::compute_offsets() { 2130 Klass* k = SystemDictionary::reflect_Constructor_klass(); 2131 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2132 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 2133 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 2134 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 2135 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2136 // The generic signature and annotations fields are only present in 1.5 2137 signature_offset = -1; 2138 annotations_offset = -1; 2139 parameter_annotations_offset = -1; 2140 type_annotations_offset = -1; 2141 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 2142 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 2143 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 2144 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 2145 } 2146 2147 Handle java_lang_reflect_Constructor::create(TRAPS) { 2148 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2149 Symbol* name = vmSymbols::java_lang_reflect_Constructor(); 2150 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2151 instanceKlassHandle klass (THREAD, k); 2152 // Ensure it is initialized 2153 klass->initialize(CHECK_NH); 2154 return klass->allocate_instance_handle(CHECK_NH); 2155 } 2156 2157 oop java_lang_reflect_Constructor::clazz(oop reflect) { 2158 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2159 return reflect->obj_field(clazz_offset); 2160 } 2161 2162 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 2163 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2164 reflect->obj_field_put(clazz_offset, value); 2165 } 2166 2167 oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 2168 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2169 return constructor->obj_field(parameterTypes_offset); 2170 } 2171 2172 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 2173 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2174 constructor->obj_field_put(parameterTypes_offset, value); 2175 } 2176 2177 oop java_lang_reflect_Constructor::exception_types(oop constructor) { 2178 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2179 return constructor->obj_field(exceptionTypes_offset); 2180 } 2181 2182 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 2183 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2184 constructor->obj_field_put(exceptionTypes_offset, value); 2185 } 2186 2187 int java_lang_reflect_Constructor::slot(oop reflect) { 2188 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2189 return reflect->int_field(slot_offset); 2190 } 2191 2192 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 2193 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2194 reflect->int_field_put(slot_offset, value); 2195 } 2196 2197 int java_lang_reflect_Constructor::modifiers(oop constructor) { 2198 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2199 return constructor->int_field(modifiers_offset); 2200 } 2201 2202 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 2203 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2204 constructor->int_field_put(modifiers_offset, value); 2205 } 2206 2207 bool java_lang_reflect_Constructor::has_signature_field() { 2208 return (signature_offset >= 0); 2209 } 2210 2211 oop java_lang_reflect_Constructor::signature(oop constructor) { 2212 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2213 assert(has_signature_field(), "signature field must be present"); 2214 return constructor->obj_field(signature_offset); 2215 } 2216 2217 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 2218 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2219 assert(has_signature_field(), "signature field must be present"); 2220 constructor->obj_field_put(signature_offset, value); 2221 } 2222 2223 bool java_lang_reflect_Constructor::has_annotations_field() { 2224 return (annotations_offset >= 0); 2225 } 2226 2227 oop java_lang_reflect_Constructor::annotations(oop constructor) { 2228 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2229 assert(has_annotations_field(), "annotations field must be present"); 2230 return constructor->obj_field(annotations_offset); 2231 } 2232 2233 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 2234 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2235 assert(has_annotations_field(), "annotations field must be present"); 2236 constructor->obj_field_put(annotations_offset, value); 2237 } 2238 2239 bool java_lang_reflect_Constructor::has_parameter_annotations_field() { 2240 return (parameter_annotations_offset >= 0); 2241 } 2242 2243 oop java_lang_reflect_Constructor::parameter_annotations(oop method) { 2244 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2245 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2246 return method->obj_field(parameter_annotations_offset); 2247 } 2248 2249 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 2250 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2251 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2252 method->obj_field_put(parameter_annotations_offset, value); 2253 } 2254 2255 bool java_lang_reflect_Constructor::has_type_annotations_field() { 2256 return (type_annotations_offset >= 0); 2257 } 2258 2259 oop java_lang_reflect_Constructor::type_annotations(oop constructor) { 2260 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2261 assert(has_type_annotations_field(), "type_annotations field must be present"); 2262 return constructor->obj_field(type_annotations_offset); 2263 } 2264 2265 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) { 2266 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2267 assert(has_type_annotations_field(), "type_annotations field must be present"); 2268 constructor->obj_field_put(type_annotations_offset, value); 2269 } 2270 2271 void java_lang_reflect_Field::compute_offsets() { 2272 Klass* k = SystemDictionary::reflect_Field_klass(); 2273 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2274 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2275 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature()); 2276 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 2277 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2278 // The generic signature and annotations fields are only present in 1.5 2279 signature_offset = -1; 2280 annotations_offset = -1; 2281 type_annotations_offset = -1; 2282 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 2283 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 2284 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 2285 } 2286 2287 Handle java_lang_reflect_Field::create(TRAPS) { 2288 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2289 Symbol* name = vmSymbols::java_lang_reflect_Field(); 2290 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2291 instanceKlassHandle klass (THREAD, k); 2292 // Ensure it is initialized 2293 klass->initialize(CHECK_NH); 2294 return klass->allocate_instance_handle(CHECK_NH); 2295 } 2296 2297 oop java_lang_reflect_Field::clazz(oop reflect) { 2298 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2299 return reflect->obj_field(clazz_offset); 2300 } 2301 2302 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 2303 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2304 reflect->obj_field_put(clazz_offset, value); 2305 } 2306 2307 oop java_lang_reflect_Field::name(oop field) { 2308 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2309 return field->obj_field(name_offset); 2310 } 2311 2312 void java_lang_reflect_Field::set_name(oop field, oop value) { 2313 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2314 field->obj_field_put(name_offset, value); 2315 } 2316 2317 oop java_lang_reflect_Field::type(oop field) { 2318 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2319 return field->obj_field(type_offset); 2320 } 2321 2322 void java_lang_reflect_Field::set_type(oop field, oop value) { 2323 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2324 field->obj_field_put(type_offset, value); 2325 } 2326 2327 int java_lang_reflect_Field::slot(oop reflect) { 2328 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2329 return reflect->int_field(slot_offset); 2330 } 2331 2332 void java_lang_reflect_Field::set_slot(oop reflect, int value) { 2333 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2334 reflect->int_field_put(slot_offset, value); 2335 } 2336 2337 int java_lang_reflect_Field::modifiers(oop field) { 2338 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2339 return field->int_field(modifiers_offset); 2340 } 2341 2342 void java_lang_reflect_Field::set_modifiers(oop field, int value) { 2343 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2344 field->int_field_put(modifiers_offset, value); 2345 } 2346 2347 bool java_lang_reflect_Field::has_signature_field() { 2348 return (signature_offset >= 0); 2349 } 2350 2351 oop java_lang_reflect_Field::signature(oop field) { 2352 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2353 assert(has_signature_field(), "signature field must be present"); 2354 return field->obj_field(signature_offset); 2355 } 2356 2357 void java_lang_reflect_Field::set_signature(oop field, oop value) { 2358 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2359 assert(has_signature_field(), "signature field must be present"); 2360 field->obj_field_put(signature_offset, value); 2361 } 2362 2363 bool java_lang_reflect_Field::has_annotations_field() { 2364 return (annotations_offset >= 0); 2365 } 2366 2367 oop java_lang_reflect_Field::annotations(oop field) { 2368 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2369 assert(has_annotations_field(), "annotations field must be present"); 2370 return field->obj_field(annotations_offset); 2371 } 2372 2373 void java_lang_reflect_Field::set_annotations(oop field, oop value) { 2374 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2375 assert(has_annotations_field(), "annotations field must be present"); 2376 field->obj_field_put(annotations_offset, value); 2377 } 2378 2379 bool java_lang_reflect_Field::has_type_annotations_field() { 2380 return (type_annotations_offset >= 0); 2381 } 2382 2383 oop java_lang_reflect_Field::type_annotations(oop field) { 2384 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2385 assert(has_type_annotations_field(), "type_annotations field must be present"); 2386 return field->obj_field(type_annotations_offset); 2387 } 2388 2389 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) { 2390 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2391 assert(has_type_annotations_field(), "type_annotations field must be present"); 2392 field->obj_field_put(type_annotations_offset, value); 2393 } 2394 2395 void sun_reflect_ConstantPool::compute_offsets() { 2396 Klass* k = SystemDictionary::reflect_ConstantPool_klass(); 2397 // This null test can be removed post beta 2398 if (k != NULL) { 2399 // The field is called ConstantPool* in the sun.reflect.ConstantPool class. 2400 compute_offset(_oop_offset, k, vmSymbols::ConstantPool_name(), vmSymbols::object_signature()); 2401 } 2402 } 2403 2404 void java_lang_reflect_Parameter::compute_offsets() { 2405 Klass* k = SystemDictionary::reflect_Parameter_klass(); 2406 if(NULL != k) { 2407 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2408 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2409 compute_offset(index_offset, k, vmSymbols::index_name(), vmSymbols::int_signature()); 2410 compute_offset(executable_offset, k, vmSymbols::executable_name(), vmSymbols::executable_signature()); 2411 } 2412 } 2413 2414 Handle java_lang_reflect_Parameter::create(TRAPS) { 2415 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2416 Symbol* name = vmSymbols::java_lang_reflect_Parameter(); 2417 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2418 instanceKlassHandle klass (THREAD, k); 2419 // Ensure it is initialized 2420 klass->initialize(CHECK_NH); 2421 return klass->allocate_instance_handle(CHECK_NH); 2422 } 2423 2424 oop java_lang_reflect_Parameter::name(oop param) { 2425 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2426 return param->obj_field(name_offset); 2427 } 2428 2429 void java_lang_reflect_Parameter::set_name(oop param, oop value) { 2430 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2431 param->obj_field_put(name_offset, value); 2432 } 2433 2434 int java_lang_reflect_Parameter::modifiers(oop param) { 2435 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2436 return param->int_field(modifiers_offset); 2437 } 2438 2439 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) { 2440 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2441 param->int_field_put(modifiers_offset, value); 2442 } 2443 2444 int java_lang_reflect_Parameter::index(oop param) { 2445 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2446 return param->int_field(index_offset); 2447 } 2448 2449 void java_lang_reflect_Parameter::set_index(oop param, int value) { 2450 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2451 param->int_field_put(index_offset, value); 2452 } 2453 2454 oop java_lang_reflect_Parameter::executable(oop param) { 2455 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2456 return param->obj_field(executable_offset); 2457 } 2458 2459 void java_lang_reflect_Parameter::set_executable(oop param, oop value) { 2460 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2461 param->obj_field_put(executable_offset, value); 2462 } 2463 2464 2465 Handle sun_reflect_ConstantPool::create(TRAPS) { 2466 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2467 Klass* k = SystemDictionary::reflect_ConstantPool_klass(); 2468 instanceKlassHandle klass (THREAD, k); 2469 // Ensure it is initialized 2470 klass->initialize(CHECK_NH); 2471 return klass->allocate_instance_handle(CHECK_NH); 2472 } 2473 2474 2475 void sun_reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) { 2476 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2477 oop mirror = value->pool_holder()->java_mirror(); 2478 // Save the mirror to get back the constant pool. 2479 reflect->obj_field_put(_oop_offset, mirror); 2480 } 2481 2482 ConstantPool* sun_reflect_ConstantPool::get_cp(oop reflect) { 2483 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2484 2485 oop mirror = reflect->obj_field(_oop_offset); 2486 Klass* k = java_lang_Class::as_Klass(mirror); 2487 assert(k->oop_is_instance(), "Must be"); 2488 2489 // Get the constant pool back from the klass. Since class redefinition 2490 // merges the new constant pool into the old, this is essentially the 2491 // same constant pool as the original. If constant pool merging is 2492 // no longer done in the future, this will have to change to save 2493 // the original. 2494 return InstanceKlass::cast(k)->constants(); 2495 } 2496 2497 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() { 2498 Klass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass(); 2499 // This null test can be removed post beta 2500 if (k != NULL) { 2501 compute_offset(_base_offset, k, 2502 vmSymbols::base_name(), vmSymbols::object_signature()); 2503 } 2504 } 2505 2506 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 2507 Klass* k = SystemDictionary::box_klass(type); 2508 if (k == NULL) return NULL; 2509 instanceKlassHandle h (THREAD, k); 2510 if (!h->is_initialized()) h->initialize(CHECK_0); 2511 return h->allocate_instance(THREAD); 2512 } 2513 2514 2515 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 2516 oop box = initialize_and_allocate(type, CHECK_0); 2517 if (box == NULL) return NULL; 2518 switch (type) { 2519 case T_BOOLEAN: 2520 box->bool_field_put(value_offset, value->z); 2521 break; 2522 case T_CHAR: 2523 box->char_field_put(value_offset, value->c); 2524 break; 2525 case T_FLOAT: 2526 box->float_field_put(value_offset, value->f); 2527 break; 2528 case T_DOUBLE: 2529 box->double_field_put(long_value_offset, value->d); 2530 break; 2531 case T_BYTE: 2532 box->byte_field_put(value_offset, value->b); 2533 break; 2534 case T_SHORT: 2535 box->short_field_put(value_offset, value->s); 2536 break; 2537 case T_INT: 2538 box->int_field_put(value_offset, value->i); 2539 break; 2540 case T_LONG: 2541 box->long_field_put(long_value_offset, value->j); 2542 break; 2543 default: 2544 return NULL; 2545 } 2546 return box; 2547 } 2548 2549 2550 BasicType java_lang_boxing_object::basic_type(oop box) { 2551 if (box == NULL) return T_ILLEGAL; 2552 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2553 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 2554 return T_ILLEGAL; 2555 return type; 2556 } 2557 2558 2559 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 2560 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2561 switch (type) { 2562 case T_BOOLEAN: 2563 value->z = box->bool_field(value_offset); 2564 break; 2565 case T_CHAR: 2566 value->c = box->char_field(value_offset); 2567 break; 2568 case T_FLOAT: 2569 value->f = box->float_field(value_offset); 2570 break; 2571 case T_DOUBLE: 2572 value->d = box->double_field(long_value_offset); 2573 break; 2574 case T_BYTE: 2575 value->b = box->byte_field(value_offset); 2576 break; 2577 case T_SHORT: 2578 value->s = box->short_field(value_offset); 2579 break; 2580 case T_INT: 2581 value->i = box->int_field(value_offset); 2582 break; 2583 case T_LONG: 2584 value->j = box->long_field(long_value_offset); 2585 break; 2586 default: 2587 return T_ILLEGAL; 2588 } // end switch 2589 return type; 2590 } 2591 2592 2593 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 2594 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2595 switch (type) { 2596 case T_BOOLEAN: 2597 box->bool_field_put(value_offset, value->z); 2598 break; 2599 case T_CHAR: 2600 box->char_field_put(value_offset, value->c); 2601 break; 2602 case T_FLOAT: 2603 box->float_field_put(value_offset, value->f); 2604 break; 2605 case T_DOUBLE: 2606 box->double_field_put(long_value_offset, value->d); 2607 break; 2608 case T_BYTE: 2609 box->byte_field_put(value_offset, value->b); 2610 break; 2611 case T_SHORT: 2612 box->short_field_put(value_offset, value->s); 2613 break; 2614 case T_INT: 2615 box->int_field_put(value_offset, value->i); 2616 break; 2617 case T_LONG: 2618 box->long_field_put(long_value_offset, value->j); 2619 break; 2620 default: 2621 return T_ILLEGAL; 2622 } // end switch 2623 return type; 2624 } 2625 2626 2627 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) { 2628 switch (type) { 2629 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break; 2630 case T_CHAR: st->print("%d", value->c); break; 2631 case T_BYTE: st->print("%d", value->b); break; 2632 case T_SHORT: st->print("%d", value->s); break; 2633 case T_INT: st->print("%d", value->i); break; 2634 case T_LONG: st->print(INT64_FORMAT, value->j); break; 2635 case T_FLOAT: st->print("%f", value->f); break; 2636 case T_DOUBLE: st->print("%lf", value->d); break; 2637 default: st->print("type %d?", type); break; 2638 } 2639 } 2640 2641 2642 // Support for java_lang_ref_Reference 2643 HeapWord *java_lang_ref_Reference::pending_list_lock_addr() { 2644 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass()); 2645 address addr = ik->static_field_addr(static_lock_offset); 2646 return (HeapWord*) addr; 2647 } 2648 2649 oop java_lang_ref_Reference::pending_list_lock() { 2650 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass()); 2651 address addr = ik->static_field_addr(static_lock_offset); 2652 if (UseCompressedOops) { 2653 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 2654 } else { 2655 return oopDesc::load_decode_heap_oop((oop*)addr); 2656 } 2657 } 2658 2659 HeapWord *java_lang_ref_Reference::pending_list_addr() { 2660 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass()); 2661 address addr = ik->static_field_addr(static_pending_offset); 2662 // XXX This might not be HeapWord aligned, almost rather be char *. 2663 return (HeapWord*)addr; 2664 } 2665 2666 oop java_lang_ref_Reference::pending_list() { 2667 char *addr = (char *)pending_list_addr(); 2668 if (UseCompressedOops) { 2669 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 2670 } else { 2671 return oopDesc::load_decode_heap_oop((oop*)addr); 2672 } 2673 } 2674 2675 2676 // Support for java_lang_ref_SoftReference 2677 2678 jlong java_lang_ref_SoftReference::timestamp(oop ref) { 2679 return ref->long_field(timestamp_offset); 2680 } 2681 2682 jlong java_lang_ref_SoftReference::clock() { 2683 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass()); 2684 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset); 2685 return *offset; 2686 } 2687 2688 void java_lang_ref_SoftReference::set_clock(jlong value) { 2689 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass()); 2690 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset); 2691 *offset = value; 2692 } 2693 2694 // Support for java_lang_invoke_DirectMethodHandle 2695 2696 int java_lang_invoke_DirectMethodHandle::_member_offset; 2697 2698 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) { 2699 oop member_name = NULL; 2700 bool is_dmh = dmh->is_oop() && java_lang_invoke_DirectMethodHandle::is_instance(dmh); 2701 assert(is_dmh, "a DirectMethodHandle oop is expected"); 2702 if (is_dmh) { 2703 member_name = dmh->obj_field(member_offset_in_bytes()); 2704 } 2705 return member_name; 2706 } 2707 2708 void java_lang_invoke_DirectMethodHandle::compute_offsets() { 2709 Klass* klass_oop = SystemDictionary::DirectMethodHandle_klass(); 2710 if (klass_oop != NULL) { 2711 compute_offset(_member_offset, klass_oop, vmSymbols::member_name(), vmSymbols::java_lang_invoke_MemberName_signature()); 2712 } 2713 } 2714 2715 // Support for java_lang_invoke_MethodHandle 2716 2717 int java_lang_invoke_MethodHandle::_type_offset; 2718 int java_lang_invoke_MethodHandle::_form_offset; 2719 2720 int java_lang_invoke_MemberName::_clazz_offset; 2721 int java_lang_invoke_MemberName::_name_offset; 2722 int java_lang_invoke_MemberName::_type_offset; 2723 int java_lang_invoke_MemberName::_flags_offset; 2724 int java_lang_invoke_MemberName::_next_offset; 2725 int java_lang_invoke_MemberName::_vmtarget_offset; 2726 int java_lang_invoke_MemberName::_vmloader_offset; 2727 int java_lang_invoke_MemberName::_vmindex_offset; 2728 2729 int java_lang_invoke_LambdaForm::_vmentry_offset; 2730 2731 void java_lang_invoke_MethodHandle::compute_offsets() { 2732 Klass* klass_oop = SystemDictionary::MethodHandle_klass(); 2733 if (klass_oop != NULL) { 2734 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature()); 2735 compute_offset(_form_offset, klass_oop, vmSymbols::form_name(), vmSymbols::java_lang_invoke_LambdaForm_signature()); 2736 } 2737 } 2738 2739 void java_lang_invoke_MemberName::compute_offsets() { 2740 Klass* klass_oop = SystemDictionary::MemberName_klass(); 2741 if (klass_oop != NULL) { 2742 compute_offset(_clazz_offset, klass_oop, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2743 compute_offset(_name_offset, klass_oop, vmSymbols::name_name(), vmSymbols::string_signature()); 2744 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::object_signature()); 2745 compute_offset(_flags_offset, klass_oop, vmSymbols::flags_name(), vmSymbols::int_signature()); 2746 compute_offset(_next_offset, klass_oop, vmSymbols::next_name(), vmSymbols::java_lang_invoke_MemberName_signature()); 2747 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 2748 } 2749 } 2750 2751 void java_lang_invoke_LambdaForm::compute_offsets() { 2752 Klass* klass_oop = SystemDictionary::LambdaForm_klass(); 2753 if (klass_oop != NULL) { 2754 compute_offset(_vmentry_offset, klass_oop, vmSymbols::vmentry_name(), vmSymbols::java_lang_invoke_MemberName_signature()); 2755 } 2756 } 2757 2758 oop java_lang_invoke_MethodHandle::type(oop mh) { 2759 return mh->obj_field(_type_offset); 2760 } 2761 2762 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) { 2763 mh->obj_field_put(_type_offset, mtype); 2764 } 2765 2766 oop java_lang_invoke_MethodHandle::form(oop mh) { 2767 assert(_form_offset != 0, ""); 2768 return mh->obj_field(_form_offset); 2769 } 2770 2771 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) { 2772 assert(_form_offset != 0, ""); 2773 mh->obj_field_put(_form_offset, lform); 2774 } 2775 2776 /// MemberName accessors 2777 2778 oop java_lang_invoke_MemberName::clazz(oop mname) { 2779 assert(is_instance(mname), "wrong type"); 2780 return mname->obj_field(_clazz_offset); 2781 } 2782 2783 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) { 2784 assert(is_instance(mname), "wrong type"); 2785 mname->obj_field_put(_clazz_offset, clazz); 2786 } 2787 2788 oop java_lang_invoke_MemberName::name(oop mname) { 2789 assert(is_instance(mname), "wrong type"); 2790 return mname->obj_field(_name_offset); 2791 } 2792 2793 void java_lang_invoke_MemberName::set_name(oop mname, oop name) { 2794 assert(is_instance(mname), "wrong type"); 2795 mname->obj_field_put(_name_offset, name); 2796 } 2797 2798 oop java_lang_invoke_MemberName::type(oop mname) { 2799 assert(is_instance(mname), "wrong type"); 2800 return mname->obj_field(_type_offset); 2801 } 2802 2803 void java_lang_invoke_MemberName::set_type(oop mname, oop type) { 2804 assert(is_instance(mname), "wrong type"); 2805 mname->obj_field_put(_type_offset, type); 2806 } 2807 2808 int java_lang_invoke_MemberName::flags(oop mname) { 2809 assert(is_instance(mname), "wrong type"); 2810 return mname->int_field(_flags_offset); 2811 } 2812 2813 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) { 2814 assert(is_instance(mname), "wrong type"); 2815 mname->int_field_put(_flags_offset, flags); 2816 } 2817 2818 oop java_lang_invoke_MemberName::next(oop mname) { 2819 assert(is_instance(mname), "wrong type"); 2820 return mname->obj_field(_next_offset); 2821 } 2822 2823 Metadata* java_lang_invoke_MemberName::vmtarget(oop mname) { 2824 assert(is_instance(mname), "wrong type"); 2825 return (Metadata*)mname->address_field(_vmtarget_offset); 2826 } 2827 2828 #if INCLUDE_JVMTI 2829 // Can be executed on VM thread only 2830 void java_lang_invoke_MemberName::adjust_vmtarget(oop mname, Metadata* ref) { 2831 assert((is_instance(mname) && (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0), "wrong type"); 2832 assert(Thread::current()->is_VM_thread(), "not VM thread"); 2833 mname->address_field_put(_vmtarget_offset, (address)ref); 2834 } 2835 #endif // INCLUDE_JVMTI 2836 2837 void java_lang_invoke_MemberName::set_vmtarget(oop mname, Metadata* ref) { 2838 assert(is_instance(mname), "wrong type"); 2839 // check the type of the vmtarget 2840 oop dependency = NULL; 2841 if (ref != NULL) { 2842 switch (flags(mname) & (MN_IS_METHOD | 2843 MN_IS_CONSTRUCTOR | 2844 MN_IS_FIELD)) { 2845 case MN_IS_METHOD: 2846 case MN_IS_CONSTRUCTOR: 2847 assert(ref->is_method(), "should be a method"); 2848 dependency = ((Method*)ref)->method_holder()->java_mirror(); 2849 break; 2850 case MN_IS_FIELD: 2851 assert(ref->is_klass(), "should be a class"); 2852 dependency = ((Klass*)ref)->java_mirror(); 2853 break; 2854 default: 2855 ShouldNotReachHere(); 2856 } 2857 } 2858 mname->address_field_put(_vmtarget_offset, (address)ref); 2859 // Add a reference to the loader (actually mirror because anonymous classes will not have 2860 // distinct loaders) to ensure the metadata is kept alive 2861 // This mirror may be different than the one in clazz field. 2862 mname->obj_field_put(_vmloader_offset, dependency); 2863 } 2864 2865 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) { 2866 assert(is_instance(mname), "wrong type"); 2867 return (intptr_t) mname->address_field(_vmindex_offset); 2868 } 2869 2870 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) { 2871 assert(is_instance(mname), "wrong type"); 2872 mname->address_field_put(_vmindex_offset, (address) index); 2873 } 2874 2875 oop java_lang_invoke_LambdaForm::vmentry(oop lform) { 2876 assert(is_instance(lform), "wrong type"); 2877 return lform->obj_field(_vmentry_offset); 2878 } 2879 2880 2881 // Support for java_lang_invoke_MethodType 2882 2883 int java_lang_invoke_MethodType::_rtype_offset; 2884 int java_lang_invoke_MethodType::_ptypes_offset; 2885 2886 void java_lang_invoke_MethodType::compute_offsets() { 2887 Klass* k = SystemDictionary::MethodType_klass(); 2888 if (k != NULL) { 2889 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature()); 2890 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature()); 2891 } 2892 } 2893 2894 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) { 2895 st->print("("); 2896 objArrayOop pts = ptypes(mt); 2897 for (int i = 0, limit = pts->length(); i < limit; i++) { 2898 java_lang_Class::print_signature(pts->obj_at(i), st); 2899 } 2900 st->print(")"); 2901 java_lang_Class::print_signature(rtype(mt), st); 2902 } 2903 2904 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) { 2905 ResourceMark rm; 2906 stringStream buffer(128); 2907 print_signature(mt, &buffer); 2908 const char* sigstr = buffer.base(); 2909 int siglen = (int) buffer.size(); 2910 Symbol *name; 2911 if (!intern_if_not_found) { 2912 name = SymbolTable::probe(sigstr, siglen); 2913 } else { 2914 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 2915 } 2916 return name; 2917 } 2918 2919 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) { 2920 if (mt1 == mt2) 2921 return true; 2922 if (rtype(mt1) != rtype(mt2)) 2923 return false; 2924 if (ptype_count(mt1) != ptype_count(mt2)) 2925 return false; 2926 for (int i = ptype_count(mt1) - 1; i >= 0; i--) { 2927 if (ptype(mt1, i) != ptype(mt2, i)) 2928 return false; 2929 } 2930 return true; 2931 } 2932 2933 oop java_lang_invoke_MethodType::rtype(oop mt) { 2934 assert(is_instance(mt), "must be a MethodType"); 2935 return mt->obj_field(_rtype_offset); 2936 } 2937 2938 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) { 2939 assert(is_instance(mt), "must be a MethodType"); 2940 return (objArrayOop) mt->obj_field(_ptypes_offset); 2941 } 2942 2943 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) { 2944 return ptypes(mt)->obj_at(idx); 2945 } 2946 2947 int java_lang_invoke_MethodType::ptype_count(oop mt) { 2948 return ptypes(mt)->length(); 2949 } 2950 2951 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) { 2952 objArrayOop pts = ptypes(mt); 2953 int count = pts->length(); 2954 int slots = 0; 2955 for (int i = 0; i < count; i++) { 2956 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i)); 2957 slots += type2size[bt]; 2958 } 2959 return slots; 2960 } 2961 2962 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) { 2963 BasicType bt = java_lang_Class::as_BasicType(rtype(mt)); 2964 return type2size[bt]; 2965 } 2966 2967 2968 // Support for java_lang_invoke_CallSite 2969 2970 int java_lang_invoke_CallSite::_target_offset; 2971 2972 void java_lang_invoke_CallSite::compute_offsets() { 2973 Klass* k = SystemDictionary::CallSite_klass(); 2974 if (k != NULL) { 2975 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature()); 2976 } 2977 } 2978 2979 2980 // Support for java_security_AccessControlContext 2981 2982 int java_security_AccessControlContext::_context_offset = 0; 2983 int java_security_AccessControlContext::_privilegedContext_offset = 0; 2984 int java_security_AccessControlContext::_isPrivileged_offset = 0; 2985 int java_security_AccessControlContext::_isAuthorized_offset = -1; 2986 2987 void java_security_AccessControlContext::compute_offsets() { 2988 assert(_isPrivileged_offset == 0, "offsets should be initialized only once"); 2989 fieldDescriptor fd; 2990 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass()); 2991 2992 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) { 2993 fatal("Invalid layout of java.security.AccessControlContext"); 2994 } 2995 _context_offset = fd.offset(); 2996 2997 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) { 2998 fatal("Invalid layout of java.security.AccessControlContext"); 2999 } 3000 _privilegedContext_offset = fd.offset(); 3001 3002 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) { 3003 fatal("Invalid layout of java.security.AccessControlContext"); 3004 } 3005 _isPrivileged_offset = fd.offset(); 3006 3007 // The offset may not be present for bootstrapping with older JDK. 3008 if (ik->find_local_field(vmSymbols::isAuthorized_name(), vmSymbols::bool_signature(), &fd)) { 3009 _isAuthorized_offset = fd.offset(); 3010 } 3011 } 3012 3013 3014 bool java_security_AccessControlContext::is_authorized(Handle context) { 3015 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type"); 3016 assert(_isAuthorized_offset != -1, "should be set"); 3017 return context->bool_field(_isAuthorized_offset) != 0; 3018 } 3019 3020 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) { 3021 assert(_isPrivileged_offset != 0, "offsets should have been initialized"); 3022 // Ensure klass is initialized 3023 InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->initialize(CHECK_0); 3024 // Allocate result 3025 oop result = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->allocate_instance(CHECK_0); 3026 // Fill in values 3027 result->obj_field_put(_context_offset, context()); 3028 result->obj_field_put(_privilegedContext_offset, privileged_context()); 3029 result->bool_field_put(_isPrivileged_offset, isPrivileged); 3030 // whitelist AccessControlContexts created by the JVM if present 3031 if (_isAuthorized_offset != -1) { 3032 result->bool_field_put(_isAuthorized_offset, true); 3033 } 3034 return result; 3035 } 3036 3037 3038 // Support for java_lang_ClassLoader 3039 3040 bool java_lang_ClassLoader::offsets_computed = false; 3041 int java_lang_ClassLoader::_loader_data_offset = -1; 3042 int java_lang_ClassLoader::parallelCapable_offset = -1; 3043 3044 ClassLoaderData** java_lang_ClassLoader::loader_data_addr(oop loader) { 3045 assert(loader != NULL && loader->is_oop(), "loader must be oop"); 3046 return (ClassLoaderData**) loader->address_field_addr(_loader_data_offset); 3047 } 3048 3049 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) { 3050 return *java_lang_ClassLoader::loader_data_addr(loader); 3051 } 3052 3053 void java_lang_ClassLoader::compute_offsets() { 3054 assert(!offsets_computed, "offsets should be initialized only once"); 3055 offsets_computed = true; 3056 3057 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7, 3058 Klass* k1 = SystemDictionary::ClassLoader_klass(); 3059 compute_optional_offset(parallelCapable_offset, 3060 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature()); 3061 3062 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3063 } 3064 3065 oop java_lang_ClassLoader::parent(oop loader) { 3066 assert(is_instance(loader), "loader must be oop"); 3067 return loader->obj_field(parent_offset); 3068 } 3069 3070 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) { 3071 assert(is_instance(loader), "loader must be oop"); 3072 assert(cl == NULL || is_instance(cl), "cl argument must be oop"); 3073 oop acl = loader; 3074 debug_only(jint loop_count = 0); 3075 // This loop taken verbatim from ClassLoader.java: 3076 do { 3077 acl = parent(acl); 3078 if (cl == acl) { 3079 return true; 3080 } 3081 assert(++loop_count > 0, "loop_count overflow"); 3082 } while (acl != NULL); 3083 return false; 3084 } 3085 3086 3087 // For class loader classes, parallelCapable defined 3088 // based on non-null field 3089 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it 3090 bool java_lang_ClassLoader::parallelCapable(oop class_loader) { 3091 if (parallelCapable_offset == -1) { 3092 // Default for backward compatibility is false 3093 return false; 3094 } 3095 return (class_loader->obj_field(parallelCapable_offset) != NULL); 3096 } 3097 3098 bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 3099 // Fix for 4474172; see evaluation for more details 3100 loader = non_reflection_class_loader(loader); 3101 3102 oop cl = SystemDictionary::java_system_loader(); 3103 while(cl != NULL) { 3104 if (cl == loader) return true; 3105 cl = parent(cl); 3106 } 3107 return false; 3108 } 3109 3110 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) { 3111 if (loader != NULL) { 3112 // See whether this is one of the class loaders associated with 3113 // the generated bytecodes for reflection, and if so, "magically" 3114 // delegate to its parent to prevent class loading from occurring 3115 // in places where applications using reflection didn't expect it. 3116 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass(); 3117 // This might be null in non-1.4 JDKs 3118 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) { 3119 return parent(loader); 3120 } 3121 } 3122 return loader; 3123 } 3124 3125 3126 // Support for java_lang_System 3127 int java_lang_System::in_offset_in_bytes() { 3128 return (InstanceMirrorKlass::offset_of_static_fields() + static_in_offset); 3129 } 3130 3131 3132 int java_lang_System::out_offset_in_bytes() { 3133 return (InstanceMirrorKlass::offset_of_static_fields() + static_out_offset); 3134 } 3135 3136 3137 int java_lang_System::err_offset_in_bytes() { 3138 return (InstanceMirrorKlass::offset_of_static_fields() + static_err_offset); 3139 } 3140 3141 3142 bool java_lang_System::has_security_manager() { 3143 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::System_klass()); 3144 address addr = ik->static_field_addr(static_security_offset); 3145 if (UseCompressedOops) { 3146 return oopDesc::load_decode_heap_oop((narrowOop *)addr) != NULL; 3147 } else { 3148 return oopDesc::load_decode_heap_oop((oop*)addr) != NULL; 3149 } 3150 } 3151 3152 int java_lang_Class::_klass_offset; 3153 int java_lang_Class::_array_klass_offset; 3154 int java_lang_Class::_oop_size_offset; 3155 int java_lang_Class::_static_oop_field_count_offset; 3156 int java_lang_Class::_class_loader_offset; 3157 int java_lang_Class::_protection_domain_offset; 3158 int java_lang_Class::_component_mirror_offset; 3159 int java_lang_Class::_init_lock_offset; 3160 int java_lang_Class::_signers_offset; 3161 int java_lang_Class::_classData_offset; 3162 3163 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL; 3164 3165 int java_lang_Throwable::backtrace_offset; 3166 int java_lang_Throwable::detailMessage_offset; 3167 int java_lang_Throwable::cause_offset; 3168 int java_lang_Throwable::stackTrace_offset; 3169 int java_lang_Throwable::static_unassigned_stacktrace_offset; 3170 3171 int java_lang_reflect_AccessibleObject::override_offset; 3172 3173 int java_lang_reflect_Method::clazz_offset; 3174 int java_lang_reflect_Method::name_offset; 3175 int java_lang_reflect_Method::returnType_offset; 3176 int java_lang_reflect_Method::parameterTypes_offset; 3177 int java_lang_reflect_Method::exceptionTypes_offset; 3178 int java_lang_reflect_Method::slot_offset; 3179 int java_lang_reflect_Method::modifiers_offset; 3180 int java_lang_reflect_Method::signature_offset; 3181 int java_lang_reflect_Method::annotations_offset; 3182 int java_lang_reflect_Method::parameter_annotations_offset; 3183 int java_lang_reflect_Method::annotation_default_offset; 3184 int java_lang_reflect_Method::type_annotations_offset; 3185 3186 int java_lang_reflect_Constructor::clazz_offset; 3187 int java_lang_reflect_Constructor::parameterTypes_offset; 3188 int java_lang_reflect_Constructor::exceptionTypes_offset; 3189 int java_lang_reflect_Constructor::slot_offset; 3190 int java_lang_reflect_Constructor::modifiers_offset; 3191 int java_lang_reflect_Constructor::signature_offset; 3192 int java_lang_reflect_Constructor::annotations_offset; 3193 int java_lang_reflect_Constructor::parameter_annotations_offset; 3194 int java_lang_reflect_Constructor::type_annotations_offset; 3195 3196 int java_lang_reflect_Field::clazz_offset; 3197 int java_lang_reflect_Field::name_offset; 3198 int java_lang_reflect_Field::type_offset; 3199 int java_lang_reflect_Field::slot_offset; 3200 int java_lang_reflect_Field::modifiers_offset; 3201 int java_lang_reflect_Field::signature_offset; 3202 int java_lang_reflect_Field::annotations_offset; 3203 int java_lang_reflect_Field::type_annotations_offset; 3204 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 3210 int java_lang_boxing_object::value_offset; 3211 int java_lang_boxing_object::long_value_offset; 3212 3213 int java_lang_ref_Reference::referent_offset; 3214 int java_lang_ref_Reference::queue_offset; 3215 int java_lang_ref_Reference::next_offset; 3216 int java_lang_ref_Reference::discovered_offset; 3217 int java_lang_ref_Reference::static_lock_offset; 3218 int java_lang_ref_Reference::static_pending_offset; 3219 int java_lang_ref_Reference::number_of_fake_oop_fields; 3220 3221 int java_lang_ref_SoftReference::timestamp_offset; 3222 int java_lang_ref_SoftReference::static_clock_offset; 3223 3224 int java_lang_ClassLoader::parent_offset; 3225 3226 int java_lang_System::static_in_offset; 3227 int java_lang_System::static_out_offset; 3228 int java_lang_System::static_err_offset; 3229 int java_lang_System::static_security_offset; 3230 3231 int java_lang_StackTraceElement::declaringClass_offset; 3232 int java_lang_StackTraceElement::methodName_offset; 3233 int java_lang_StackTraceElement::fileName_offset; 3234 int java_lang_StackTraceElement::lineNumber_offset; 3235 3236 int java_lang_AssertionStatusDirectives::classes_offset; 3237 int java_lang_AssertionStatusDirectives::classEnabled_offset; 3238 int java_lang_AssertionStatusDirectives::packages_offset; 3239 int java_lang_AssertionStatusDirectives::packageEnabled_offset; 3240 int java_lang_AssertionStatusDirectives::deflt_offset; 3241 3242 int java_nio_Buffer::_limit_offset; 3243 3244 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0; 3245 3246 int sun_reflect_ConstantPool::_oop_offset; 3247 3248 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset; 3249 3250 3251 // Support for java_lang_StackTraceElement 3252 3253 void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 3254 element->obj_field_put(fileName_offset, value); 3255 } 3256 3257 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 3258 element->obj_field_put(declaringClass_offset, value); 3259 } 3260 3261 void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 3262 element->obj_field_put(methodName_offset, value); 3263 } 3264 3265 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 3266 element->int_field_put(lineNumber_offset, value); 3267 } 3268 3269 3270 // Support for java Assertions - java_lang_AssertionStatusDirectives. 3271 3272 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 3273 o->obj_field_put(classes_offset, val); 3274 } 3275 3276 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 3277 o->obj_field_put(classEnabled_offset, val); 3278 } 3279 3280 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 3281 o->obj_field_put(packages_offset, val); 3282 } 3283 3284 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 3285 o->obj_field_put(packageEnabled_offset, val); 3286 } 3287 3288 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 3289 o->bool_field_put(deflt_offset, val); 3290 } 3291 3292 3293 // Support for intrinsification of java.nio.Buffer.checkIndex 3294 int java_nio_Buffer::limit_offset() { 3295 return _limit_offset; 3296 } 3297 3298 3299 void java_nio_Buffer::compute_offsets() { 3300 Klass* k = SystemDictionary::nio_Buffer_klass(); 3301 assert(k != NULL, "must be loaded in 1.4+"); 3302 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature()); 3303 } 3304 3305 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) { 3306 if (_owner_offset != 0) return; 3307 3308 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK); 3309 Klass* k = SystemDictionary::abstract_ownable_synchronizer_klass(); 3310 compute_offset(_owner_offset, k, 3311 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature()); 3312 } 3313 3314 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 3315 assert(_owner_offset != 0, "Must be initialized"); 3316 return obj->obj_field(_owner_offset); 3317 } 3318 3319 // Compute hard-coded offsets 3320 // Invoked before SystemDictionary::initialize, so pre-loaded classes 3321 // are not available to determine the offset_of_static_fields. 3322 void JavaClasses::compute_hard_coded_offsets() { 3323 const int x = heapOopSize; 3324 const int header = instanceOopDesc::base_offset_in_bytes(); 3325 3326 // Throwable Class 3327 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header; 3328 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header; 3329 java_lang_Throwable::cause_offset = java_lang_Throwable::hc_cause_offset * x + header; 3330 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header; 3331 java_lang_Throwable::static_unassigned_stacktrace_offset = java_lang_Throwable::hc_static_unassigned_stacktrace_offset * x; 3332 3333 // java_lang_boxing_object 3334 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header; 3335 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong); 3336 3337 // java_lang_ref_Reference: 3338 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header; 3339 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header; 3340 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header; 3341 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header; 3342 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x; 3343 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x; 3344 // Artificial fields for java_lang_ref_Reference 3345 // The first field is for the discovered field added in 1.4 3346 java_lang_ref_Reference::number_of_fake_oop_fields = 1; 3347 3348 // java_lang_ref_SoftReference Class 3349 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong); 3350 // Don't multiply static fields because they are always in wordSize units 3351 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x; 3352 3353 // java_lang_ClassLoader 3354 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header; 3355 3356 // java_lang_System 3357 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x; 3358 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x; 3359 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x; 3360 java_lang_System::static_security_offset = java_lang_System::hc_static_security_offset * x; 3361 3362 // java_lang_StackTraceElement 3363 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header; 3364 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header; 3365 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header; 3366 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header; 3367 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header; 3368 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header; 3369 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header; 3370 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header; 3371 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header; 3372 3373 } 3374 3375 3376 // Compute non-hard-coded field offsets of all the classes in this file 3377 void JavaClasses::compute_offsets() { 3378 // java_lang_Class::compute_offsets was called earlier in bootstrap 3379 java_lang_ClassLoader::compute_offsets(); 3380 java_lang_Thread::compute_offsets(); 3381 java_lang_ThreadGroup::compute_offsets(); 3382 java_lang_invoke_MethodHandle::compute_offsets(); 3383 java_lang_invoke_DirectMethodHandle::compute_offsets(); 3384 java_lang_invoke_MemberName::compute_offsets(); 3385 java_lang_invoke_MemberName_ClassData::compute_offsets(); 3386 java_lang_invoke_LambdaForm::compute_offsets(); 3387 java_lang_invoke_MethodType::compute_offsets(); 3388 java_lang_invoke_CallSite::compute_offsets(); 3389 java_security_AccessControlContext::compute_offsets(); 3390 // Initialize reflection classes. The layouts of these classes 3391 // changed with the new reflection implementation in JDK 1.4, and 3392 // since the Universe doesn't know what JDK version it is until this 3393 // point we defer computation of these offsets until now. 3394 java_lang_reflect_AccessibleObject::compute_offsets(); 3395 java_lang_reflect_Method::compute_offsets(); 3396 java_lang_reflect_Constructor::compute_offsets(); 3397 java_lang_reflect_Field::compute_offsets(); 3398 java_nio_Buffer::compute_offsets(); 3399 sun_reflect_ConstantPool::compute_offsets(); 3400 sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets(); 3401 java_lang_reflect_Parameter::compute_offsets(); 3402 3403 // generated interpreter code wants to know about the offsets we just computed: 3404 AbstractAssembler::update_delayed_values(); 3405 } 3406 3407 #ifndef PRODUCT 3408 3409 // These functions exist to assert the validity of hard-coded field offsets to guard 3410 // against changes in the class files 3411 3412 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 3413 EXCEPTION_MARK; 3414 fieldDescriptor fd; 3415 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3416 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3417 instanceKlassHandle h_klass (THREAD, k); 3418 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3419 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3420 if (!h_klass->find_local_field(f_name, f_sig, &fd)) { 3421 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 3422 return false; 3423 } 3424 if (fd.is_static()) { 3425 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 3426 return false; 3427 } 3428 if (fd.offset() == hardcoded_offset ) { 3429 return true; 3430 } else { 3431 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.", 3432 klass_name, field_name, hardcoded_offset, fd.offset()); 3433 return false; 3434 } 3435 } 3436 3437 3438 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 3439 EXCEPTION_MARK; 3440 fieldDescriptor fd; 3441 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3442 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3443 instanceKlassHandle h_klass (THREAD, k); 3444 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3445 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3446 if (!h_klass->find_local_field(f_name, f_sig, &fd)) { 3447 tty->print_cr("Static field %s.%s not found", klass_name, field_name); 3448 return false; 3449 } 3450 if (!fd.is_static()) { 3451 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name); 3452 return false; 3453 } 3454 if (fd.offset() == hardcoded_offset + InstanceMirrorKlass::offset_of_static_fields()) { 3455 return true; 3456 } else { 3457 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()); 3458 return false; 3459 } 3460 } 3461 3462 3463 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) { 3464 EXCEPTION_MARK; 3465 fieldDescriptor fd; 3466 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3467 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3468 instanceKlassHandle h_klass (THREAD, k); 3469 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3470 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3471 if (!h_klass->find_local_field(f_name, f_sig, &fd)) { 3472 tty->print_cr("Static field %s.%s not found", klass_name, field_name); 3473 return false; 3474 } 3475 if (!fd.is_static() || !fd.has_initial_value()) { 3476 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name); 3477 return false; 3478 } 3479 if (!fd.initial_value_tag().is_int()) { 3480 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name); 3481 return false; 3482 } 3483 jint field_value = fd.int_initial_value(); 3484 if (field_value == hardcoded_constant) { 3485 return true; 3486 } else { 3487 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); 3488 return false; 3489 } 3490 } 3491 3492 3493 // Check the hard-coded field offsets of all the classes in this file 3494 3495 void JavaClasses::check_offsets() { 3496 bool valid = true; 3497 HandleMark hm; 3498 3499 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3500 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig) 3501 3502 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3503 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig) 3504 3505 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3506 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig) 3507 3508 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \ 3509 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig) 3510 3511 // java.lang.String 3512 3513 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C"); 3514 if (java_lang_String::has_offset_field()) { 3515 CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I"); 3516 CHECK_OFFSET("java/lang/String", java_lang_String, count, "I"); 3517 } 3518 if (java_lang_String::has_hash_field()) { 3519 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I"); 3520 } 3521 3522 // java.lang.Class 3523 3524 // Fake fields 3525 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked 3526 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked 3527 3528 // java.lang.Throwable 3529 3530 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;"); 3531 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;"); 3532 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;"); 3533 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;"); 3534 3535 // Boxed primitive objects (java_lang_boxing_object) 3536 3537 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 3538 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 3539 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 3540 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 3541 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 3542 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 3543 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 3544 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 3545 3546 // java.lang.ClassLoader 3547 3548 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;"); 3549 3550 // java.lang.System 3551 3552 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;"); 3553 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;"); 3554 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;"); 3555 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, security, "Ljava/lang/SecurityManager;"); 3556 3557 // java.lang.StackTraceElement 3558 3559 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;"); 3560 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;"); 3561 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;"); 3562 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I"); 3563 3564 // java.lang.ref.Reference 3565 3566 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;"); 3567 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;"); 3568 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;"); 3569 // Fake field 3570 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;"); 3571 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;"); 3572 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;"); 3573 3574 // java.lang.ref.SoftReference 3575 3576 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J"); 3577 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J"); 3578 3579 // java.lang.AssertionStatusDirectives 3580 // 3581 // The CheckAssertionStatusDirectives boolean can be removed from here and 3582 // globals.hpp after the AssertionStatusDirectives class has been integrated 3583 // into merlin "for some time." Without it, the vm will fail with early 3584 // merlin builds. 3585 3586 if (CheckAssertionStatusDirectives) { 3587 const char* nm = "java/lang/AssertionStatusDirectives"; 3588 const char* sig = "[Ljava/lang/String;"; 3589 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig); 3590 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z"); 3591 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig); 3592 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z"); 3593 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z"); 3594 } 3595 3596 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed"); 3597 } 3598 3599 #endif // PRODUCT 3600 3601 int InjectedField::compute_offset() { 3602 Klass* klass_oop = klass(); 3603 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) { 3604 if (!may_be_java && !fs.access_flags().is_internal()) { 3605 // Only look at injected fields 3606 continue; 3607 } 3608 if (fs.name() == name() && fs.signature() == signature()) { 3609 return fs.offset(); 3610 } 3611 } 3612 ResourceMark rm; 3613 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)" : ""); 3614 #ifndef PRODUCT 3615 klass_oop->print(); 3616 tty->print_cr("all fields:"); 3617 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) { 3618 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 3619 } 3620 #endif //PRODUCT 3621 fatal("Invalid layout of preloaded class"); 3622 return -1; 3623 } 3624 3625 void javaClasses_init() { 3626 JavaClasses::compute_offsets(); 3627 JavaClasses::check_offsets(); 3628 FilteredFieldsMap::initialize(); // must be done after computing offsets. 3629 }