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", ik->external_name(), name_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 Klass* k = SystemDictionary::Class_klass(); 878 // The classRedefinedCount field is only present starting in 1.5, 879 // so don't go fatal. 880 compute_optional_offset(classRedefinedCount_offset, 881 k, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature()); 882 883 // Needs to be optional because the old build runs Queens during bootstrapping 884 // and jdk8-9 doesn't have coordinated pushes yet. 885 compute_optional_offset(_class_loader_offset, 886 k, vmSymbols::classLoader_name(), 887 vmSymbols::classloader_signature()); 888 889 compute_offset(_component_mirror_offset, 890 k, vmSymbols::componentType_name(), 891 vmSymbols::class_signature()); 892 893 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have 894 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops 895 // GC treats them the same. 896 _init_lock_offset = _component_mirror_offset; 897 898 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 899 } 900 901 int java_lang_Class::classRedefinedCount(oop the_class_mirror) { 902 if (classRedefinedCount_offset == -1) { 903 // If we don't have an offset for it then just return -1 as a marker. 904 return -1; 905 } 906 907 return the_class_mirror->int_field(classRedefinedCount_offset); 908 } 909 910 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) { 911 if (classRedefinedCount_offset == -1) { 912 // If we don't have an offset for it then nothing to set. 913 return; 914 } 915 916 the_class_mirror->int_field_put(classRedefinedCount_offset, value); 917 } 918 919 920 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the 921 // platform thread structure, and a eetop offset which was used for thread 922 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures 923 // merged, so in the HotSpot VM we just use the eetop field for the thread 924 // instead of the privateInfo_offset. 925 // 926 // Note: The stackSize field is only present starting in 1.4. 927 928 int java_lang_Thread::_name_offset = 0; 929 int java_lang_Thread::_group_offset = 0; 930 int java_lang_Thread::_contextClassLoader_offset = 0; 931 int java_lang_Thread::_inheritedAccessControlContext_offset = 0; 932 int java_lang_Thread::_priority_offset = 0; 933 int java_lang_Thread::_eetop_offset = 0; 934 int java_lang_Thread::_daemon_offset = 0; 935 int java_lang_Thread::_stillborn_offset = 0; 936 int java_lang_Thread::_stackSize_offset = 0; 937 int java_lang_Thread::_tid_offset = 0; 938 int java_lang_Thread::_thread_status_offset = 0; 939 int java_lang_Thread::_park_blocker_offset = 0; 940 int java_lang_Thread::_park_event_offset = 0 ; 941 942 943 void java_lang_Thread::compute_offsets() { 944 assert(_group_offset == 0, "offsets should be initialized only once"); 945 946 Klass* k = SystemDictionary::Thread_klass(); 947 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 948 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature()); 949 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature()); 950 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature()); 951 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature()); 952 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature()); 953 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature()); 954 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature()); 955 // The stackSize field is only present starting in 1.4, so don't go fatal. 956 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature()); 957 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal. 958 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature()); 959 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature()); 960 // The parkBlocker field is only present starting in 1.6, so don't go fatal. 961 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature()); 962 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(), 963 vmSymbols::long_signature()); 964 } 965 966 967 JavaThread* java_lang_Thread::thread(oop java_thread) { 968 return (JavaThread*)java_thread->address_field(_eetop_offset); 969 } 970 971 972 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) { 973 java_thread->address_field_put(_eetop_offset, (address)thread); 974 } 975 976 977 oop java_lang_Thread::name(oop java_thread) { 978 return java_thread->obj_field(_name_offset); 979 } 980 981 982 void java_lang_Thread::set_name(oop java_thread, oop name) { 983 java_thread->obj_field_put(_name_offset, name); 984 } 985 986 987 ThreadPriority java_lang_Thread::priority(oop java_thread) { 988 return (ThreadPriority)java_thread->int_field(_priority_offset); 989 } 990 991 992 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) { 993 java_thread->int_field_put(_priority_offset, priority); 994 } 995 996 997 oop java_lang_Thread::threadGroup(oop java_thread) { 998 return java_thread->obj_field(_group_offset); 999 } 1000 1001 1002 bool java_lang_Thread::is_stillborn(oop java_thread) { 1003 return java_thread->bool_field(_stillborn_offset) != 0; 1004 } 1005 1006 1007 // We never have reason to turn the stillborn bit off 1008 void java_lang_Thread::set_stillborn(oop java_thread) { 1009 java_thread->bool_field_put(_stillborn_offset, true); 1010 } 1011 1012 1013 bool java_lang_Thread::is_alive(oop java_thread) { 1014 JavaThread* thr = java_lang_Thread::thread(java_thread); 1015 return (thr != NULL); 1016 } 1017 1018 1019 bool java_lang_Thread::is_daemon(oop java_thread) { 1020 return java_thread->bool_field(_daemon_offset) != 0; 1021 } 1022 1023 1024 void java_lang_Thread::set_daemon(oop java_thread) { 1025 java_thread->bool_field_put(_daemon_offset, true); 1026 } 1027 1028 oop java_lang_Thread::context_class_loader(oop java_thread) { 1029 return java_thread->obj_field(_contextClassLoader_offset); 1030 } 1031 1032 oop java_lang_Thread::inherited_access_control_context(oop java_thread) { 1033 return java_thread->obj_field(_inheritedAccessControlContext_offset); 1034 } 1035 1036 1037 jlong java_lang_Thread::stackSize(oop java_thread) { 1038 if (_stackSize_offset > 0) { 1039 return java_thread->long_field(_stackSize_offset); 1040 } else { 1041 return 0; 1042 } 1043 } 1044 1045 // Write the thread status value to threadStatus field in java.lang.Thread java class. 1046 void java_lang_Thread::set_thread_status(oop java_thread, 1047 java_lang_Thread::ThreadStatus status) { 1048 // The threadStatus is only present starting in 1.5 1049 if (_thread_status_offset > 0) { 1050 java_thread->int_field_put(_thread_status_offset, status); 1051 } 1052 } 1053 1054 // Read thread status value from threadStatus field in java.lang.Thread java class. 1055 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) { 1056 assert(Thread::current()->is_Watcher_thread() || Thread::current()->is_VM_thread() || 1057 JavaThread::current()->thread_state() == _thread_in_vm, 1058 "Java Thread is not running in vm"); 1059 // The threadStatus is only present starting in 1.5 1060 if (_thread_status_offset > 0) { 1061 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1062 } else { 1063 // All we can easily figure out is if it is alive, but that is 1064 // enough info for a valid unknown status. 1065 // These aren't restricted to valid set ThreadStatus values, so 1066 // use JVMTI values and cast. 1067 JavaThread* thr = java_lang_Thread::thread(java_thread); 1068 if (thr == NULL) { 1069 // the thread hasn't run yet or is in the process of exiting 1070 return NEW; 1071 } 1072 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE; 1073 } 1074 } 1075 1076 1077 jlong java_lang_Thread::thread_id(oop java_thread) { 1078 // The thread ID field is only present starting in 1.5 1079 if (_tid_offset > 0) { 1080 return java_thread->long_field(_tid_offset); 1081 } else { 1082 return 0; 1083 } 1084 } 1085 1086 oop java_lang_Thread::park_blocker(oop java_thread) { 1087 assert(JDK_Version::current().supports_thread_park_blocker() && 1088 _park_blocker_offset != 0, "Must support parkBlocker field"); 1089 1090 if (_park_blocker_offset > 0) { 1091 return java_thread->obj_field(_park_blocker_offset); 1092 } 1093 1094 return NULL; 1095 } 1096 1097 jlong java_lang_Thread::park_event(oop java_thread) { 1098 if (_park_event_offset > 0) { 1099 return java_thread->long_field(_park_event_offset); 1100 } 1101 return 0; 1102 } 1103 1104 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) { 1105 if (_park_event_offset > 0) { 1106 java_thread->long_field_put(_park_event_offset, ptr); 1107 return true; 1108 } 1109 return false; 1110 } 1111 1112 1113 const char* java_lang_Thread::thread_status_name(oop java_thread) { 1114 assert(_thread_status_offset != 0, "Must have thread status"); 1115 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1116 switch (status) { 1117 case NEW : return "NEW"; 1118 case RUNNABLE : return "RUNNABLE"; 1119 case SLEEPING : return "TIMED_WAITING (sleeping)"; 1120 case IN_OBJECT_WAIT : return "WAITING (on object monitor)"; 1121 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)"; 1122 case PARKED : return "WAITING (parking)"; 1123 case PARKED_TIMED : return "TIMED_WAITING (parking)"; 1124 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)"; 1125 case TERMINATED : return "TERMINATED"; 1126 default : return "UNKNOWN"; 1127 }; 1128 } 1129 int java_lang_ThreadGroup::_parent_offset = 0; 1130 int java_lang_ThreadGroup::_name_offset = 0; 1131 int java_lang_ThreadGroup::_threads_offset = 0; 1132 int java_lang_ThreadGroup::_groups_offset = 0; 1133 int java_lang_ThreadGroup::_maxPriority_offset = 0; 1134 int java_lang_ThreadGroup::_destroyed_offset = 0; 1135 int java_lang_ThreadGroup::_daemon_offset = 0; 1136 int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0; 1137 int java_lang_ThreadGroup::_nthreads_offset = 0; 1138 int java_lang_ThreadGroup::_ngroups_offset = 0; 1139 1140 oop java_lang_ThreadGroup::parent(oop java_thread_group) { 1141 assert(java_thread_group->is_oop(), "thread group must be oop"); 1142 return java_thread_group->obj_field(_parent_offset); 1143 } 1144 1145 // ("name as oop" accessor is not necessary) 1146 1147 typeArrayOop java_lang_ThreadGroup::name(oop java_thread_group) { 1148 oop name = java_thread_group->obj_field(_name_offset); 1149 // ThreadGroup.name can be null 1150 return name == NULL ? (typeArrayOop)NULL : java_lang_String::value(name); 1151 } 1152 1153 int java_lang_ThreadGroup::nthreads(oop java_thread_group) { 1154 assert(java_thread_group->is_oop(), "thread group must be oop"); 1155 return java_thread_group->int_field(_nthreads_offset); 1156 } 1157 1158 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) { 1159 oop threads = java_thread_group->obj_field(_threads_offset); 1160 assert(threads != NULL, "threadgroups should have threads"); 1161 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code 1162 return objArrayOop(threads); 1163 } 1164 1165 int java_lang_ThreadGroup::ngroups(oop java_thread_group) { 1166 assert(java_thread_group->is_oop(), "thread group must be oop"); 1167 return java_thread_group->int_field(_ngroups_offset); 1168 } 1169 1170 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) { 1171 oop groups = java_thread_group->obj_field(_groups_offset); 1172 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code 1173 return objArrayOop(groups); 1174 } 1175 1176 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) { 1177 assert(java_thread_group->is_oop(), "thread group must be oop"); 1178 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset); 1179 } 1180 1181 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) { 1182 assert(java_thread_group->is_oop(), "thread group must be oop"); 1183 return java_thread_group->bool_field(_destroyed_offset) != 0; 1184 } 1185 1186 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) { 1187 assert(java_thread_group->is_oop(), "thread group must be oop"); 1188 return java_thread_group->bool_field(_daemon_offset) != 0; 1189 } 1190 1191 bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) { 1192 assert(java_thread_group->is_oop(), "thread group must be oop"); 1193 return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0; 1194 } 1195 1196 void java_lang_ThreadGroup::compute_offsets() { 1197 assert(_parent_offset == 0, "offsets should be initialized only once"); 1198 1199 Klass* k = SystemDictionary::ThreadGroup_klass(); 1200 1201 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature()); 1202 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1203 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature()); 1204 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature()); 1205 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature()); 1206 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature()); 1207 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature()); 1208 compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature()); 1209 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature()); 1210 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature()); 1211 } 1212 1213 oop java_lang_Throwable::unassigned_stacktrace() { 1214 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Throwable_klass()); 1215 address addr = ik->static_field_addr(static_unassigned_stacktrace_offset); 1216 if (UseCompressedOops) { 1217 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 1218 } else { 1219 return oopDesc::load_decode_heap_oop((oop*)addr); 1220 } 1221 } 1222 1223 oop java_lang_Throwable::backtrace(oop throwable) { 1224 return throwable->obj_field_acquire(backtrace_offset); 1225 } 1226 1227 1228 void java_lang_Throwable::set_backtrace(oop throwable, oop value) { 1229 throwable->release_obj_field_put(backtrace_offset, value); 1230 } 1231 1232 1233 oop java_lang_Throwable::message(oop throwable) { 1234 return throwable->obj_field(detailMessage_offset); 1235 } 1236 1237 1238 oop java_lang_Throwable::message(Handle throwable) { 1239 return throwable->obj_field(detailMessage_offset); 1240 } 1241 1242 1243 // Return Symbol for detailed_message or NULL 1244 Symbol* java_lang_Throwable::detail_message(oop throwable) { 1245 PRESERVE_EXCEPTION_MARK; // Keep original exception 1246 oop detailed_message = java_lang_Throwable::message(throwable); 1247 if (detailed_message != NULL) { 1248 return java_lang_String::as_symbol(detailed_message, THREAD); 1249 } 1250 return NULL; 1251 } 1252 1253 void java_lang_Throwable::set_message(oop throwable, oop value) { 1254 throwable->obj_field_put(detailMessage_offset, value); 1255 } 1256 1257 1258 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) { 1259 throwable->obj_field_put(stackTrace_offset, st_element_array); 1260 } 1261 1262 void java_lang_Throwable::clear_stacktrace(oop throwable) { 1263 set_stacktrace(throwable, NULL); 1264 } 1265 1266 1267 void java_lang_Throwable::print(oop throwable, outputStream* st) { 1268 ResourceMark rm; 1269 Klass* k = throwable->klass(); 1270 assert(k != NULL, "just checking"); 1271 st->print("%s", InstanceKlass::cast(k)->external_name()); 1272 oop msg = message(throwable); 1273 if (msg != NULL) { 1274 st->print(": %s", java_lang_String::as_utf8_string(msg)); 1275 } 1276 } 1277 1278 1279 void java_lang_Throwable::print(Handle throwable, outputStream* st) { 1280 ResourceMark rm; 1281 Klass* k = throwable->klass(); 1282 assert(k != NULL, "just checking"); 1283 st->print("%s", InstanceKlass::cast(k)->external_name()); 1284 oop msg = message(throwable); 1285 if (msg != NULL) { 1286 st->print(": %s", java_lang_String::as_utf8_string(msg)); 1287 } 1288 } 1289 1290 // After this many redefines, the stack trace is unreliable. 1291 const int MAX_VERSION = USHRT_MAX; 1292 1293 // Helper backtrace functions to store bci|version together. 1294 static inline int merge_bci_and_version(int bci, int version) { 1295 // only store u2 for version, checking for overflow. 1296 if (version > USHRT_MAX || version < 0) version = MAX_VERSION; 1297 assert((jushort)bci == bci, "bci should be short"); 1298 return build_int_from_shorts(version, bci); 1299 } 1300 1301 static inline int bci_at(unsigned int merged) { 1302 return extract_high_short_from_int(merged); 1303 } 1304 static inline int version_at(unsigned int merged) { 1305 return extract_low_short_from_int(merged); 1306 } 1307 1308 static inline bool version_matches(Method* method, int version) { 1309 return (method->constants()->version() == version && version < MAX_VERSION); 1310 } 1311 1312 static inline int get_line_number(Method* method, int bci) { 1313 int line_number = 0; 1314 if (method->is_native()) { 1315 // Negative value different from -1 below, enabling Java code in 1316 // class java.lang.StackTraceElement to distinguish "native" from 1317 // "no LineNumberTable". JDK tests for -2. 1318 line_number = -2; 1319 } else { 1320 // Returns -1 if no LineNumberTable, and otherwise actual line number 1321 line_number = method->line_number_from_bci(bci); 1322 if (line_number == -1 && ShowHiddenFrames) { 1323 line_number = bci + 1000000; 1324 } 1325 } 1326 return line_number; 1327 } 1328 1329 // This class provides a simple wrapper over the internal structure of 1330 // exception backtrace to insulate users of the backtrace from needing 1331 // to know what it looks like. 1332 class BacktraceBuilder: public StackObj { 1333 private: 1334 Handle _backtrace; 1335 objArrayOop _head; 1336 typeArrayOop _methods; 1337 typeArrayOop _bcis; 1338 objArrayOop _mirrors; 1339 int _index; 1340 No_Safepoint_Verifier _nsv; 1341 1342 public: 1343 1344 enum { 1345 trace_methods_offset = java_lang_Throwable::trace_methods_offset, 1346 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset, 1347 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset, 1348 trace_next_offset = java_lang_Throwable::trace_next_offset, 1349 trace_size = java_lang_Throwable::trace_size, 1350 trace_chunk_size = java_lang_Throwable::trace_chunk_size 1351 }; 1352 1353 // get info out of chunks 1354 static typeArrayOop get_methods(objArrayHandle chunk) { 1355 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset)); 1356 assert(methods != NULL, "method array should be initialized in backtrace"); 1357 return methods; 1358 } 1359 static typeArrayOop get_bcis(objArrayHandle chunk) { 1360 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 1361 assert(bcis != NULL, "bci array should be initialized in backtrace"); 1362 return bcis; 1363 } 1364 static objArrayOop get_mirrors(objArrayHandle chunk) { 1365 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset)); 1366 assert(mirrors != NULL, "mirror array should be initialized in backtrace"); 1367 return mirrors; 1368 } 1369 1370 // constructor for new backtrace 1371 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL) { 1372 expand(CHECK); 1373 _backtrace = _head; 1374 _index = 0; 1375 } 1376 1377 BacktraceBuilder(objArrayHandle backtrace) { 1378 _methods = get_methods(backtrace); 1379 _bcis = get_bcis(backtrace); 1380 _mirrors = get_mirrors(backtrace); 1381 assert(_methods->length() == _bcis->length() && 1382 _methods->length() == _mirrors->length(), 1383 "method and source information arrays should match"); 1384 1385 // head is the preallocated backtrace 1386 _backtrace = _head = backtrace(); 1387 _index = 0; 1388 } 1389 1390 void expand(TRAPS) { 1391 objArrayHandle old_head(THREAD, _head); 1392 Pause_No_Safepoint_Verifier pnsv(&_nsv); 1393 1394 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK); 1395 objArrayHandle new_head(THREAD, head); 1396 1397 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK); 1398 typeArrayHandle new_methods(THREAD, methods); 1399 1400 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK); 1401 typeArrayHandle new_bcis(THREAD, bcis); 1402 1403 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK); 1404 objArrayHandle new_mirrors(THREAD, mirrors); 1405 1406 if (!old_head.is_null()) { 1407 old_head->obj_at_put(trace_next_offset, new_head()); 1408 } 1409 new_head->obj_at_put(trace_methods_offset, new_methods()); 1410 new_head->obj_at_put(trace_bcis_offset, new_bcis()); 1411 new_head->obj_at_put(trace_mirrors_offset, new_mirrors()); 1412 1413 _head = new_head(); 1414 _methods = new_methods(); 1415 _bcis = new_bcis(); 1416 _mirrors = new_mirrors(); 1417 _index = 0; 1418 } 1419 1420 oop backtrace() { 1421 return _backtrace(); 1422 } 1423 1424 inline void push(Method* method, int bci, TRAPS) { 1425 // Smear the -1 bci to 0 since the array only holds unsigned 1426 // shorts. The later line number lookup would just smear the -1 1427 // to a 0 even if it could be recorded. 1428 if (bci == SynchronizationEntryBCI) bci = 0; 1429 1430 if (_index >= trace_chunk_size) { 1431 methodHandle mhandle(THREAD, method); 1432 expand(CHECK); 1433 method = mhandle(); 1434 } 1435 1436 _methods->short_at_put(_index, method->method_idnum()); 1437 _bcis->int_at_put(_index, merge_bci_and_version(bci, method->constants()->version())); 1438 1439 // We need to save the mirrors in the backtrace to keep the class 1440 // from being unloaded while we still have this stack trace. 1441 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror"); 1442 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror()); 1443 _index++; 1444 } 1445 1446 }; 1447 1448 // Print stack trace element to resource allocated buffer 1449 char* java_lang_Throwable::print_stack_element_to_buffer(Handle mirror, 1450 int method_id, int version, int bci) { 1451 1452 // Get strings and string lengths 1453 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 1454 const char* klass_name = holder->external_name(); 1455 int buf_len = (int)strlen(klass_name); 1456 1457 // The method id may point to an obsolete method, can't get more stack information 1458 Method* method = holder->method_with_idnum(method_id); 1459 if (method == NULL) { 1460 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64); 1461 // This is what the java code prints in this case - added Redefined 1462 sprintf(buf, "\tat %s.null (Redefined)", klass_name); 1463 return buf; 1464 } 1465 1466 char* method_name = method->name()->as_C_string(); 1467 buf_len += (int)strlen(method_name); 1468 1469 char* source_file_name = NULL; 1470 if (version_matches(method, version)) { 1471 Symbol* source = holder->source_file_name(); 1472 if (source != NULL) { 1473 source_file_name = source->as_C_string(); 1474 buf_len += (int)strlen(source_file_name); 1475 } 1476 } 1477 1478 // Allocate temporary buffer with extra space for formatting and line number 1479 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64); 1480 1481 // Print stack trace line in buffer 1482 sprintf(buf, "\tat %s.%s", klass_name, method_name); 1483 1484 if (!version_matches(method, version)) { 1485 strcat(buf, "(Redefined)"); 1486 } else { 1487 int line_number = get_line_number(method, bci); 1488 if (line_number == -2) { 1489 strcat(buf, "(Native Method)"); 1490 } else { 1491 if (source_file_name != NULL && (line_number != -1)) { 1492 // Sourcename and linenumber 1493 sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number); 1494 } else if (source_file_name != NULL) { 1495 // Just sourcename 1496 sprintf(buf + (int)strlen(buf), "(%s)", source_file_name); 1497 } else { 1498 // Neither sourcename nor linenumber 1499 sprintf(buf + (int)strlen(buf), "(Unknown Source)"); 1500 } 1501 nmethod* nm = method->code(); 1502 if (WizardMode && nm != NULL) { 1503 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm); 1504 } 1505 } 1506 } 1507 1508 return buf; 1509 } 1510 1511 void java_lang_Throwable::print_stack_element(outputStream *st, Handle mirror, 1512 int method_id, int version, int bci) { 1513 ResourceMark rm; 1514 char* buf = print_stack_element_to_buffer(mirror, method_id, version, bci); 1515 st->print_cr("%s", buf); 1516 } 1517 1518 void java_lang_Throwable::print_stack_element(outputStream *st, methodHandle method, int bci) { 1519 Handle mirror = method->method_holder()->java_mirror(); 1520 int method_id = method->method_idnum(); 1521 int version = method->constants()->version(); 1522 print_stack_element(st, mirror, method_id, version, bci); 1523 } 1524 1525 const char* java_lang_Throwable::no_stack_trace_message() { 1526 return "\t<<no stack trace available>>"; 1527 } 1528 1529 1530 // Currently used only for exceptions occurring during startup 1531 void java_lang_Throwable::print_stack_trace(oop throwable, outputStream* st) { 1532 Thread *THREAD = Thread::current(); 1533 Handle h_throwable(THREAD, throwable); 1534 while (h_throwable.not_null()) { 1535 objArrayHandle result (THREAD, objArrayOop(backtrace(h_throwable()))); 1536 if (result.is_null()) { 1537 st->print_cr("%s", no_stack_trace_message()); 1538 return; 1539 } 1540 1541 while (result.not_null()) { 1542 1543 // Get method id, bci, version and mirror from chunk 1544 typeArrayHandle methods (THREAD, BacktraceBuilder::get_methods(result)); 1545 typeArrayHandle bcis (THREAD, BacktraceBuilder::get_bcis(result)); 1546 objArrayHandle mirrors (THREAD, BacktraceBuilder::get_mirrors(result)); 1547 1548 int length = methods()->length(); 1549 for (int index = 0; index < length; index++) { 1550 Handle mirror(THREAD, mirrors->obj_at(index)); 1551 // NULL mirror means end of stack trace 1552 if (mirror.is_null()) goto handle_cause; 1553 int method = methods->short_at(index); 1554 int version = version_at(bcis->int_at(index)); 1555 int bci = bci_at(bcis->int_at(index)); 1556 print_stack_element(st, mirror, method, version, bci); 1557 } 1558 result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset))); 1559 } 1560 handle_cause: 1561 { 1562 EXCEPTION_MARK; 1563 JavaValue cause(T_OBJECT); 1564 JavaCalls::call_virtual(&cause, 1565 h_throwable, 1566 KlassHandle(THREAD, h_throwable->klass()), 1567 vmSymbols::getCause_name(), 1568 vmSymbols::void_throwable_signature(), 1569 THREAD); 1570 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 1571 if (HAS_PENDING_EXCEPTION) { 1572 CLEAR_PENDING_EXCEPTION; 1573 h_throwable = Handle(); 1574 } else { 1575 h_throwable = Handle(THREAD, (oop) cause.get_jobject()); 1576 if (h_throwable.not_null()) { 1577 st->print("Caused by: "); 1578 print(h_throwable, st); 1579 st->cr(); 1580 } 1581 } 1582 } 1583 } 1584 } 1585 1586 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS) { 1587 if (!StackTraceInThrowable) return; 1588 ResourceMark rm(THREAD); 1589 1590 // Start out by clearing the backtrace for this object, in case the VM 1591 // runs out of memory while allocating the stack trace 1592 set_backtrace(throwable(), NULL); 1593 // Clear lazily constructed Java level stacktrace if refilling occurs 1594 // This is unnecessary in 1.7+ but harmless 1595 clear_stacktrace(throwable()); 1596 1597 int max_depth = MaxJavaStackTraceDepth; 1598 JavaThread* thread = (JavaThread*)THREAD; 1599 BacktraceBuilder bt(CHECK); 1600 1601 // If there is no Java frame just return the method that was being called 1602 // with bci 0 1603 if (!thread->has_last_Java_frame()) { 1604 if (max_depth >= 1 && method() != NULL) { 1605 bt.push(method(), 0, CHECK); 1606 set_backtrace(throwable(), bt.backtrace()); 1607 } 1608 return; 1609 } 1610 1611 // Instead of using vframe directly, this version of fill_in_stack_trace 1612 // basically handles everything by hand. This significantly improved the 1613 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows. 1614 // See bug 6333838 for more details. 1615 // The "ASSERT" here is to verify this method generates the exactly same stack 1616 // trace as utilizing vframe. 1617 #ifdef ASSERT 1618 vframeStream st(thread); 1619 methodHandle st_method(THREAD, st.method()); 1620 #endif 1621 int total_count = 0; 1622 RegisterMap map(thread, false); 1623 int decode_offset = 0; 1624 nmethod* nm = NULL; 1625 bool skip_fillInStackTrace_check = false; 1626 bool skip_throwableInit_check = false; 1627 bool skip_hidden = !ShowHiddenFrames; 1628 1629 for (frame fr = thread->last_frame(); max_depth != total_count;) { 1630 Method* method = NULL; 1631 int bci = 0; 1632 1633 // Compiled java method case. 1634 if (decode_offset != 0) { 1635 DebugInfoReadStream stream(nm, decode_offset); 1636 decode_offset = stream.read_int(); 1637 method = (Method*)nm->metadata_at(stream.read_int()); 1638 bci = stream.read_bci(); 1639 } else { 1640 if (fr.is_first_frame()) break; 1641 address pc = fr.pc(); 1642 if (fr.is_interpreted_frame()) { 1643 address bcp = fr.interpreter_frame_bcp(); 1644 method = fr.interpreter_frame_method(); 1645 bci = method->bci_from(bcp); 1646 fr = fr.sender(&map); 1647 } else { 1648 CodeBlob* cb = fr.cb(); 1649 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL 1650 // but non nmethod 1651 fr = fr.sender(&map); 1652 if (cb == NULL || !cb->is_nmethod()) { 1653 continue; 1654 } 1655 nm = (nmethod*)cb; 1656 if (nm->method()->is_native()) { 1657 method = nm->method(); 1658 bci = 0; 1659 } else { 1660 PcDesc* pd = nm->pc_desc_at(pc); 1661 decode_offset = pd->scope_decode_offset(); 1662 // if decode_offset is not equal to 0, it will execute the 1663 // "compiled java method case" at the beginning of the loop. 1664 continue; 1665 } 1666 } 1667 } 1668 #ifdef ASSERT 1669 assert(st_method() == method && st.bci() == bci, 1670 "Wrong stack trace"); 1671 st.next(); 1672 // vframeStream::method isn't GC-safe so store off a copy 1673 // of the Method* in case we GC. 1674 if (!st.at_end()) { 1675 st_method = st.method(); 1676 } 1677 #endif 1678 1679 // the format of the stacktrace will be: 1680 // - 1 or more fillInStackTrace frames for the exception class (skipped) 1681 // - 0 or more <init> methods for the exception class (skipped) 1682 // - rest of the stack 1683 1684 if (!skip_fillInStackTrace_check) { 1685 if ((method->name() == vmSymbols::fillInStackTrace_name() || 1686 method->name() == vmSymbols::fillInStackTrace0_name()) && 1687 throwable->is_a(method->method_holder())) { 1688 continue; 1689 } 1690 else { 1691 skip_fillInStackTrace_check = true; // gone past them all 1692 } 1693 } 1694 if (!skip_throwableInit_check) { 1695 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering"); 1696 1697 // skip <init> methods of the exception class and superclasses 1698 // This is simlar to classic VM. 1699 if (method->name() == vmSymbols::object_initializer_name() && 1700 throwable->is_a(method->method_holder())) { 1701 continue; 1702 } else { 1703 // there are none or we've seen them all - either way stop checking 1704 skip_throwableInit_check = true; 1705 } 1706 } 1707 if (method->is_hidden()) { 1708 if (skip_hidden) continue; 1709 } 1710 bt.push(method, bci, CHECK); 1711 total_count++; 1712 } 1713 1714 // Put completed stack trace into throwable object 1715 set_backtrace(throwable(), bt.backtrace()); 1716 } 1717 1718 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method) { 1719 // No-op if stack trace is disabled 1720 if (!StackTraceInThrowable) { 1721 return; 1722 } 1723 1724 // Disable stack traces for some preallocated out of memory errors 1725 if (!Universe::should_fill_in_stack_trace(throwable)) { 1726 return; 1727 } 1728 1729 PRESERVE_EXCEPTION_MARK; 1730 1731 JavaThread* thread = JavaThread::active(); 1732 fill_in_stack_trace(throwable, method, thread); 1733 // ignore exceptions thrown during stack trace filling 1734 CLEAR_PENDING_EXCEPTION; 1735 } 1736 1737 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 1738 // Allocate stack trace - backtrace is created but not filled in 1739 1740 // No-op if stack trace is disabled 1741 if (!StackTraceInThrowable) return; 1742 BacktraceBuilder bt(CHECK); // creates a backtrace 1743 set_backtrace(throwable(), bt.backtrace()); 1744 } 1745 1746 1747 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 1748 // Fill in stack trace into preallocated backtrace (no GC) 1749 1750 // No-op if stack trace is disabled 1751 if (!StackTraceInThrowable) return; 1752 1753 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check"); 1754 1755 JavaThread* THREAD = JavaThread::current(); 1756 1757 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable())); 1758 assert(backtrace.not_null(), "backtrace should have been preallocated"); 1759 1760 ResourceMark rm(THREAD); 1761 vframeStream st(THREAD); 1762 1763 BacktraceBuilder bt(backtrace); 1764 1765 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 1766 // methods as preallocated errors aren't created by "java" code. 1767 1768 // fill in as much stack trace as possible 1769 typeArrayOop methods = BacktraceBuilder::get_methods(backtrace); 1770 int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth); 1771 int chunk_count = 0; 1772 1773 for (;!st.at_end(); st.next()) { 1774 bt.push(st.method(), st.bci(), CHECK); 1775 chunk_count++; 1776 1777 // Bail-out for deep stacks 1778 if (chunk_count >= max_chunks) break; 1779 } 1780 1781 // We support the Throwable immutability protocol defined for Java 7. 1782 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace()); 1783 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized"); 1784 } 1785 1786 1787 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) { 1788 if (throwable == NULL) { 1789 THROW_0(vmSymbols::java_lang_NullPointerException()); 1790 } 1791 objArrayOop chunk = objArrayOop(backtrace(throwable)); 1792 int depth = 0; 1793 if (chunk != NULL) { 1794 // Iterate over chunks and count full ones 1795 while (true) { 1796 objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset)); 1797 if (next == NULL) break; 1798 depth += trace_chunk_size; 1799 chunk = next; 1800 } 1801 assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check"); 1802 // Count element in remaining partial chunk. NULL value for mirror 1803 // marks the end of the stack trace elements that are saved. 1804 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk); 1805 assert(mirrors != NULL, "sanity check"); 1806 for (int i = 0; i < mirrors->length(); i++) { 1807 if (mirrors->obj_at(i) == NULL) break; 1808 depth++; 1809 } 1810 } 1811 return depth; 1812 } 1813 1814 1815 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) { 1816 if (throwable == NULL) { 1817 THROW_0(vmSymbols::java_lang_NullPointerException()); 1818 } 1819 if (index < 0) { 1820 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 1821 } 1822 // Compute how many chunks to skip and index into actual chunk 1823 objArrayOop chunk = objArrayOop(backtrace(throwable)); 1824 int skip_chunks = index / trace_chunk_size; 1825 int chunk_index = index % trace_chunk_size; 1826 while (chunk != NULL && skip_chunks > 0) { 1827 chunk = objArrayOop(chunk->obj_at(trace_next_offset)); 1828 skip_chunks--; 1829 } 1830 if (chunk == NULL) { 1831 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 1832 } 1833 // Get method id, bci, version and mirror from chunk 1834 typeArrayOop methods = BacktraceBuilder::get_methods(chunk); 1835 typeArrayOop bcis = BacktraceBuilder::get_bcis(chunk); 1836 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk); 1837 1838 assert(methods != NULL && bcis != NULL && mirrors != NULL, "sanity check"); 1839 1840 int method = methods->short_at(chunk_index); 1841 int version = version_at(bcis->int_at(chunk_index)); 1842 int bci = bci_at(bcis->int_at(chunk_index)); 1843 Handle mirror(THREAD, mirrors->obj_at(chunk_index)); 1844 1845 // Chunk can be partial full 1846 if (mirror.is_null()) { 1847 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 1848 } 1849 1850 oop element = java_lang_StackTraceElement::create(mirror, method, version, bci, CHECK_0); 1851 return element; 1852 } 1853 1854 oop java_lang_StackTraceElement::create(Handle mirror, int method_id, 1855 int version, int bci, TRAPS) { 1856 // Allocate java.lang.StackTraceElement instance 1857 Klass* k = SystemDictionary::StackTraceElement_klass(); 1858 assert(k != NULL, "must be loaded in 1.4+"); 1859 instanceKlassHandle ik (THREAD, k); 1860 if (ik->should_be_initialized()) { 1861 ik->initialize(CHECK_0); 1862 } 1863 1864 Handle element = ik->allocate_instance_handle(CHECK_0); 1865 // Fill in class name 1866 ResourceMark rm(THREAD); 1867 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 1868 const char* str = holder->external_name(); 1869 oop classname = StringTable::intern((char*) str, CHECK_0); 1870 java_lang_StackTraceElement::set_declaringClass(element(), classname); 1871 1872 Method* method = holder->method_with_idnum(method_id); 1873 // Method on stack may be obsolete because it was redefined so cannot be 1874 // found by idnum. 1875 if (method == NULL) { 1876 // leave name and fileName null 1877 java_lang_StackTraceElement::set_lineNumber(element(), -1); 1878 return element(); 1879 } 1880 1881 // Fill in method name 1882 oop methodname = StringTable::intern(method->name(), CHECK_0); 1883 java_lang_StackTraceElement::set_methodName(element(), methodname); 1884 1885 if (!version_matches(method, version)) { 1886 // The method was redefined, accurate line number information isn't available 1887 java_lang_StackTraceElement::set_fileName(element(), NULL); 1888 java_lang_StackTraceElement::set_lineNumber(element(), -1); 1889 } else { 1890 // Fill in source file name and line number. 1891 Symbol* source = holder->source_file_name(); 1892 if (ShowHiddenFrames && source == NULL) 1893 source = vmSymbols::unknown_class_name(); 1894 oop filename = StringTable::intern(source, CHECK_0); 1895 java_lang_StackTraceElement::set_fileName(element(), filename); 1896 1897 int line_number = get_line_number(method, bci); 1898 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 1899 } 1900 return element(); 1901 } 1902 1903 oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) { 1904 Handle mirror (THREAD, method->method_holder()->java_mirror()); 1905 int method_id = method->method_idnum(); 1906 return create(mirror, method_id, method->constants()->version(), bci, THREAD); 1907 } 1908 1909 void java_lang_reflect_AccessibleObject::compute_offsets() { 1910 Klass* k = SystemDictionary::reflect_AccessibleObject_klass(); 1911 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature()); 1912 } 1913 1914 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 1915 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1916 return (jboolean) reflect->bool_field(override_offset); 1917 } 1918 1919 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 1920 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1921 reflect->bool_field_put(override_offset, (int) value); 1922 } 1923 1924 void java_lang_reflect_Method::compute_offsets() { 1925 Klass* k = SystemDictionary::reflect_Method_klass(); 1926 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 1927 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1928 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature()); 1929 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 1930 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 1931 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 1932 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 1933 // The generic signature and annotations fields are only present in 1.5 1934 signature_offset = -1; 1935 annotations_offset = -1; 1936 parameter_annotations_offset = -1; 1937 annotation_default_offset = -1; 1938 type_annotations_offset = -1; 1939 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 1940 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 1941 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 1942 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature()); 1943 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 1944 } 1945 1946 Handle java_lang_reflect_Method::create(TRAPS) { 1947 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1948 Klass* klass = SystemDictionary::reflect_Method_klass(); 1949 // This class is eagerly initialized during VM initialization, since we keep a refence 1950 // to one of the methods 1951 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized"); 1952 return InstanceKlass::cast(klass)->allocate_instance_handle(CHECK_NH); 1953 } 1954 1955 oop java_lang_reflect_Method::clazz(oop reflect) { 1956 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1957 return reflect->obj_field(clazz_offset); 1958 } 1959 1960 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 1961 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1962 reflect->obj_field_put(clazz_offset, value); 1963 } 1964 1965 int java_lang_reflect_Method::slot(oop reflect) { 1966 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1967 return reflect->int_field(slot_offset); 1968 } 1969 1970 void java_lang_reflect_Method::set_slot(oop reflect, int value) { 1971 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1972 reflect->int_field_put(slot_offset, value); 1973 } 1974 1975 oop java_lang_reflect_Method::name(oop method) { 1976 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1977 return method->obj_field(name_offset); 1978 } 1979 1980 void java_lang_reflect_Method::set_name(oop method, oop value) { 1981 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1982 method->obj_field_put(name_offset, value); 1983 } 1984 1985 oop java_lang_reflect_Method::return_type(oop method) { 1986 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1987 return method->obj_field(returnType_offset); 1988 } 1989 1990 void java_lang_reflect_Method::set_return_type(oop method, oop value) { 1991 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1992 method->obj_field_put(returnType_offset, value); 1993 } 1994 1995 oop java_lang_reflect_Method::parameter_types(oop method) { 1996 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1997 return method->obj_field(parameterTypes_offset); 1998 } 1999 2000 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 2001 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2002 method->obj_field_put(parameterTypes_offset, value); 2003 } 2004 2005 oop java_lang_reflect_Method::exception_types(oop method) { 2006 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2007 return method->obj_field(exceptionTypes_offset); 2008 } 2009 2010 void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 2011 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2012 method->obj_field_put(exceptionTypes_offset, value); 2013 } 2014 2015 int java_lang_reflect_Method::modifiers(oop method) { 2016 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2017 return method->int_field(modifiers_offset); 2018 } 2019 2020 void java_lang_reflect_Method::set_modifiers(oop method, int value) { 2021 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2022 method->int_field_put(modifiers_offset, value); 2023 } 2024 2025 bool java_lang_reflect_Method::has_signature_field() { 2026 return (signature_offset >= 0); 2027 } 2028 2029 oop java_lang_reflect_Method::signature(oop method) { 2030 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2031 assert(has_signature_field(), "signature field must be present"); 2032 return method->obj_field(signature_offset); 2033 } 2034 2035 void java_lang_reflect_Method::set_signature(oop method, oop value) { 2036 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2037 assert(has_signature_field(), "signature field must be present"); 2038 method->obj_field_put(signature_offset, value); 2039 } 2040 2041 bool java_lang_reflect_Method::has_annotations_field() { 2042 return (annotations_offset >= 0); 2043 } 2044 2045 oop java_lang_reflect_Method::annotations(oop method) { 2046 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2047 assert(has_annotations_field(), "annotations field must be present"); 2048 return method->obj_field(annotations_offset); 2049 } 2050 2051 void java_lang_reflect_Method::set_annotations(oop method, oop value) { 2052 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2053 assert(has_annotations_field(), "annotations field must be present"); 2054 method->obj_field_put(annotations_offset, value); 2055 } 2056 2057 bool java_lang_reflect_Method::has_parameter_annotations_field() { 2058 return (parameter_annotations_offset >= 0); 2059 } 2060 2061 oop java_lang_reflect_Method::parameter_annotations(oop method) { 2062 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2063 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2064 return method->obj_field(parameter_annotations_offset); 2065 } 2066 2067 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 2068 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2069 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2070 method->obj_field_put(parameter_annotations_offset, value); 2071 } 2072 2073 bool java_lang_reflect_Method::has_annotation_default_field() { 2074 return (annotation_default_offset >= 0); 2075 } 2076 2077 oop java_lang_reflect_Method::annotation_default(oop method) { 2078 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2079 assert(has_annotation_default_field(), "annotation default field must be present"); 2080 return method->obj_field(annotation_default_offset); 2081 } 2082 2083 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 2084 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2085 assert(has_annotation_default_field(), "annotation default field must be present"); 2086 method->obj_field_put(annotation_default_offset, value); 2087 } 2088 2089 bool java_lang_reflect_Method::has_type_annotations_field() { 2090 return (type_annotations_offset >= 0); 2091 } 2092 2093 oop java_lang_reflect_Method::type_annotations(oop method) { 2094 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2095 assert(has_type_annotations_field(), "type_annotations field must be present"); 2096 return method->obj_field(type_annotations_offset); 2097 } 2098 2099 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) { 2100 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2101 assert(has_type_annotations_field(), "type_annotations field must be present"); 2102 method->obj_field_put(type_annotations_offset, value); 2103 } 2104 2105 void java_lang_reflect_Constructor::compute_offsets() { 2106 Klass* k = SystemDictionary::reflect_Constructor_klass(); 2107 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2108 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 2109 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 2110 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 2111 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2112 // The generic signature and annotations fields are only present in 1.5 2113 signature_offset = -1; 2114 annotations_offset = -1; 2115 parameter_annotations_offset = -1; 2116 type_annotations_offset = -1; 2117 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 2118 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 2119 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 2120 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 2121 } 2122 2123 Handle java_lang_reflect_Constructor::create(TRAPS) { 2124 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2125 Symbol* name = vmSymbols::java_lang_reflect_Constructor(); 2126 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2127 instanceKlassHandle klass (THREAD, k); 2128 // Ensure it is initialized 2129 klass->initialize(CHECK_NH); 2130 return klass->allocate_instance_handle(CHECK_NH); 2131 } 2132 2133 oop java_lang_reflect_Constructor::clazz(oop reflect) { 2134 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2135 return reflect->obj_field(clazz_offset); 2136 } 2137 2138 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 2139 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2140 reflect->obj_field_put(clazz_offset, value); 2141 } 2142 2143 oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 2144 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2145 return constructor->obj_field(parameterTypes_offset); 2146 } 2147 2148 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 2149 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2150 constructor->obj_field_put(parameterTypes_offset, value); 2151 } 2152 2153 oop java_lang_reflect_Constructor::exception_types(oop constructor) { 2154 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2155 return constructor->obj_field(exceptionTypes_offset); 2156 } 2157 2158 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 2159 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2160 constructor->obj_field_put(exceptionTypes_offset, value); 2161 } 2162 2163 int java_lang_reflect_Constructor::slot(oop reflect) { 2164 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2165 return reflect->int_field(slot_offset); 2166 } 2167 2168 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 2169 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2170 reflect->int_field_put(slot_offset, value); 2171 } 2172 2173 int java_lang_reflect_Constructor::modifiers(oop constructor) { 2174 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2175 return constructor->int_field(modifiers_offset); 2176 } 2177 2178 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 2179 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2180 constructor->int_field_put(modifiers_offset, value); 2181 } 2182 2183 bool java_lang_reflect_Constructor::has_signature_field() { 2184 return (signature_offset >= 0); 2185 } 2186 2187 oop java_lang_reflect_Constructor::signature(oop constructor) { 2188 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2189 assert(has_signature_field(), "signature field must be present"); 2190 return constructor->obj_field(signature_offset); 2191 } 2192 2193 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 2194 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2195 assert(has_signature_field(), "signature field must be present"); 2196 constructor->obj_field_put(signature_offset, value); 2197 } 2198 2199 bool java_lang_reflect_Constructor::has_annotations_field() { 2200 return (annotations_offset >= 0); 2201 } 2202 2203 oop java_lang_reflect_Constructor::annotations(oop constructor) { 2204 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2205 assert(has_annotations_field(), "annotations field must be present"); 2206 return constructor->obj_field(annotations_offset); 2207 } 2208 2209 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 2210 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2211 assert(has_annotations_field(), "annotations field must be present"); 2212 constructor->obj_field_put(annotations_offset, value); 2213 } 2214 2215 bool java_lang_reflect_Constructor::has_parameter_annotations_field() { 2216 return (parameter_annotations_offset >= 0); 2217 } 2218 2219 oop java_lang_reflect_Constructor::parameter_annotations(oop method) { 2220 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2221 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2222 return method->obj_field(parameter_annotations_offset); 2223 } 2224 2225 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 2226 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2227 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2228 method->obj_field_put(parameter_annotations_offset, value); 2229 } 2230 2231 bool java_lang_reflect_Constructor::has_type_annotations_field() { 2232 return (type_annotations_offset >= 0); 2233 } 2234 2235 oop java_lang_reflect_Constructor::type_annotations(oop constructor) { 2236 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2237 assert(has_type_annotations_field(), "type_annotations field must be present"); 2238 return constructor->obj_field(type_annotations_offset); 2239 } 2240 2241 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) { 2242 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2243 assert(has_type_annotations_field(), "type_annotations field must be present"); 2244 constructor->obj_field_put(type_annotations_offset, value); 2245 } 2246 2247 void java_lang_reflect_Field::compute_offsets() { 2248 Klass* k = SystemDictionary::reflect_Field_klass(); 2249 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2250 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2251 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature()); 2252 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 2253 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2254 // The generic signature and annotations fields are only present in 1.5 2255 signature_offset = -1; 2256 annotations_offset = -1; 2257 type_annotations_offset = -1; 2258 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 2259 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 2260 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 2261 } 2262 2263 Handle java_lang_reflect_Field::create(TRAPS) { 2264 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2265 Symbol* name = vmSymbols::java_lang_reflect_Field(); 2266 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2267 instanceKlassHandle klass (THREAD, k); 2268 // Ensure it is initialized 2269 klass->initialize(CHECK_NH); 2270 return klass->allocate_instance_handle(CHECK_NH); 2271 } 2272 2273 oop java_lang_reflect_Field::clazz(oop reflect) { 2274 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2275 return reflect->obj_field(clazz_offset); 2276 } 2277 2278 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 2279 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2280 reflect->obj_field_put(clazz_offset, value); 2281 } 2282 2283 oop java_lang_reflect_Field::name(oop field) { 2284 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2285 return field->obj_field(name_offset); 2286 } 2287 2288 void java_lang_reflect_Field::set_name(oop field, oop value) { 2289 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2290 field->obj_field_put(name_offset, value); 2291 } 2292 2293 oop java_lang_reflect_Field::type(oop field) { 2294 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2295 return field->obj_field(type_offset); 2296 } 2297 2298 void java_lang_reflect_Field::set_type(oop field, oop value) { 2299 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2300 field->obj_field_put(type_offset, value); 2301 } 2302 2303 int java_lang_reflect_Field::slot(oop reflect) { 2304 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2305 return reflect->int_field(slot_offset); 2306 } 2307 2308 void java_lang_reflect_Field::set_slot(oop reflect, int value) { 2309 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2310 reflect->int_field_put(slot_offset, value); 2311 } 2312 2313 int java_lang_reflect_Field::modifiers(oop field) { 2314 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2315 return field->int_field(modifiers_offset); 2316 } 2317 2318 void java_lang_reflect_Field::set_modifiers(oop field, int value) { 2319 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2320 field->int_field_put(modifiers_offset, value); 2321 } 2322 2323 bool java_lang_reflect_Field::has_signature_field() { 2324 return (signature_offset >= 0); 2325 } 2326 2327 oop java_lang_reflect_Field::signature(oop field) { 2328 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2329 assert(has_signature_field(), "signature field must be present"); 2330 return field->obj_field(signature_offset); 2331 } 2332 2333 void java_lang_reflect_Field::set_signature(oop field, oop value) { 2334 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2335 assert(has_signature_field(), "signature field must be present"); 2336 field->obj_field_put(signature_offset, value); 2337 } 2338 2339 bool java_lang_reflect_Field::has_annotations_field() { 2340 return (annotations_offset >= 0); 2341 } 2342 2343 oop java_lang_reflect_Field::annotations(oop field) { 2344 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2345 assert(has_annotations_field(), "annotations field must be present"); 2346 return field->obj_field(annotations_offset); 2347 } 2348 2349 void java_lang_reflect_Field::set_annotations(oop field, oop value) { 2350 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2351 assert(has_annotations_field(), "annotations field must be present"); 2352 field->obj_field_put(annotations_offset, value); 2353 } 2354 2355 bool java_lang_reflect_Field::has_type_annotations_field() { 2356 return (type_annotations_offset >= 0); 2357 } 2358 2359 oop java_lang_reflect_Field::type_annotations(oop field) { 2360 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2361 assert(has_type_annotations_field(), "type_annotations field must be present"); 2362 return field->obj_field(type_annotations_offset); 2363 } 2364 2365 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) { 2366 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2367 assert(has_type_annotations_field(), "type_annotations field must be present"); 2368 field->obj_field_put(type_annotations_offset, value); 2369 } 2370 2371 void sun_reflect_ConstantPool::compute_offsets() { 2372 Klass* k = SystemDictionary::reflect_ConstantPool_klass(); 2373 // This null test can be removed post beta 2374 if (k != NULL) { 2375 // The field is called ConstantPool* in the sun.reflect.ConstantPool class. 2376 compute_offset(_oop_offset, k, vmSymbols::ConstantPool_name(), vmSymbols::object_signature()); 2377 } 2378 } 2379 2380 void java_lang_reflect_Parameter::compute_offsets() { 2381 Klass* k = SystemDictionary::reflect_Parameter_klass(); 2382 if(NULL != k) { 2383 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2384 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2385 compute_offset(index_offset, k, vmSymbols::index_name(), vmSymbols::int_signature()); 2386 compute_offset(executable_offset, k, vmSymbols::executable_name(), vmSymbols::executable_signature()); 2387 } 2388 } 2389 2390 Handle java_lang_reflect_Parameter::create(TRAPS) { 2391 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2392 Symbol* name = vmSymbols::java_lang_reflect_Parameter(); 2393 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2394 instanceKlassHandle klass (THREAD, k); 2395 // Ensure it is initialized 2396 klass->initialize(CHECK_NH); 2397 return klass->allocate_instance_handle(CHECK_NH); 2398 } 2399 2400 oop java_lang_reflect_Parameter::name(oop param) { 2401 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2402 return param->obj_field(name_offset); 2403 } 2404 2405 void java_lang_reflect_Parameter::set_name(oop param, oop value) { 2406 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2407 param->obj_field_put(name_offset, value); 2408 } 2409 2410 int java_lang_reflect_Parameter::modifiers(oop param) { 2411 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2412 return param->int_field(modifiers_offset); 2413 } 2414 2415 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) { 2416 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2417 param->int_field_put(modifiers_offset, value); 2418 } 2419 2420 int java_lang_reflect_Parameter::index(oop param) { 2421 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2422 return param->int_field(index_offset); 2423 } 2424 2425 void java_lang_reflect_Parameter::set_index(oop param, int value) { 2426 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2427 param->int_field_put(index_offset, value); 2428 } 2429 2430 oop java_lang_reflect_Parameter::executable(oop param) { 2431 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2432 return param->obj_field(executable_offset); 2433 } 2434 2435 void java_lang_reflect_Parameter::set_executable(oop param, oop value) { 2436 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2437 param->obj_field_put(executable_offset, value); 2438 } 2439 2440 2441 Handle sun_reflect_ConstantPool::create(TRAPS) { 2442 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2443 Klass* k = SystemDictionary::reflect_ConstantPool_klass(); 2444 instanceKlassHandle klass (THREAD, k); 2445 // Ensure it is initialized 2446 klass->initialize(CHECK_NH); 2447 return klass->allocate_instance_handle(CHECK_NH); 2448 } 2449 2450 2451 void sun_reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) { 2452 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2453 oop mirror = value->pool_holder()->java_mirror(); 2454 // Save the mirror to get back the constant pool. 2455 reflect->obj_field_put(_oop_offset, mirror); 2456 } 2457 2458 ConstantPool* sun_reflect_ConstantPool::get_cp(oop reflect) { 2459 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2460 2461 oop mirror = reflect->obj_field(_oop_offset); 2462 Klass* k = java_lang_Class::as_Klass(mirror); 2463 assert(k->oop_is_instance(), "Must be"); 2464 2465 // Get the constant pool back from the klass. Since class redefinition 2466 // merges the new constant pool into the old, this is essentially the 2467 // same constant pool as the original. If constant pool merging is 2468 // no longer done in the future, this will have to change to save 2469 // the original. 2470 return InstanceKlass::cast(k)->constants(); 2471 } 2472 2473 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() { 2474 Klass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass(); 2475 // This null test can be removed post beta 2476 if (k != NULL) { 2477 compute_offset(_base_offset, k, 2478 vmSymbols::base_name(), vmSymbols::object_signature()); 2479 } 2480 } 2481 2482 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 2483 Klass* k = SystemDictionary::box_klass(type); 2484 if (k == NULL) return NULL; 2485 instanceKlassHandle h (THREAD, k); 2486 if (!h->is_initialized()) h->initialize(CHECK_0); 2487 return h->allocate_instance(THREAD); 2488 } 2489 2490 2491 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 2492 oop box = initialize_and_allocate(type, CHECK_0); 2493 if (box == NULL) return NULL; 2494 switch (type) { 2495 case T_BOOLEAN: 2496 box->bool_field_put(value_offset, value->z); 2497 break; 2498 case T_CHAR: 2499 box->char_field_put(value_offset, value->c); 2500 break; 2501 case T_FLOAT: 2502 box->float_field_put(value_offset, value->f); 2503 break; 2504 case T_DOUBLE: 2505 box->double_field_put(long_value_offset, value->d); 2506 break; 2507 case T_BYTE: 2508 box->byte_field_put(value_offset, value->b); 2509 break; 2510 case T_SHORT: 2511 box->short_field_put(value_offset, value->s); 2512 break; 2513 case T_INT: 2514 box->int_field_put(value_offset, value->i); 2515 break; 2516 case T_LONG: 2517 box->long_field_put(long_value_offset, value->j); 2518 break; 2519 default: 2520 return NULL; 2521 } 2522 return box; 2523 } 2524 2525 2526 BasicType java_lang_boxing_object::basic_type(oop box) { 2527 if (box == NULL) return T_ILLEGAL; 2528 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2529 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 2530 return T_ILLEGAL; 2531 return type; 2532 } 2533 2534 2535 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 2536 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2537 switch (type) { 2538 case T_BOOLEAN: 2539 value->z = box->bool_field(value_offset); 2540 break; 2541 case T_CHAR: 2542 value->c = box->char_field(value_offset); 2543 break; 2544 case T_FLOAT: 2545 value->f = box->float_field(value_offset); 2546 break; 2547 case T_DOUBLE: 2548 value->d = box->double_field(long_value_offset); 2549 break; 2550 case T_BYTE: 2551 value->b = box->byte_field(value_offset); 2552 break; 2553 case T_SHORT: 2554 value->s = box->short_field(value_offset); 2555 break; 2556 case T_INT: 2557 value->i = box->int_field(value_offset); 2558 break; 2559 case T_LONG: 2560 value->j = box->long_field(long_value_offset); 2561 break; 2562 default: 2563 return T_ILLEGAL; 2564 } // end switch 2565 return type; 2566 } 2567 2568 2569 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 2570 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2571 switch (type) { 2572 case T_BOOLEAN: 2573 box->bool_field_put(value_offset, value->z); 2574 break; 2575 case T_CHAR: 2576 box->char_field_put(value_offset, value->c); 2577 break; 2578 case T_FLOAT: 2579 box->float_field_put(value_offset, value->f); 2580 break; 2581 case T_DOUBLE: 2582 box->double_field_put(long_value_offset, value->d); 2583 break; 2584 case T_BYTE: 2585 box->byte_field_put(value_offset, value->b); 2586 break; 2587 case T_SHORT: 2588 box->short_field_put(value_offset, value->s); 2589 break; 2590 case T_INT: 2591 box->int_field_put(value_offset, value->i); 2592 break; 2593 case T_LONG: 2594 box->long_field_put(long_value_offset, value->j); 2595 break; 2596 default: 2597 return T_ILLEGAL; 2598 } // end switch 2599 return type; 2600 } 2601 2602 2603 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) { 2604 switch (type) { 2605 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break; 2606 case T_CHAR: st->print("%d", value->c); break; 2607 case T_BYTE: st->print("%d", value->b); break; 2608 case T_SHORT: st->print("%d", value->s); break; 2609 case T_INT: st->print("%d", value->i); break; 2610 case T_LONG: st->print(INT64_FORMAT, value->j); break; 2611 case T_FLOAT: st->print("%f", value->f); break; 2612 case T_DOUBLE: st->print("%lf", value->d); break; 2613 default: st->print("type %d?", type); break; 2614 } 2615 } 2616 2617 2618 // Support for java_lang_ref_Reference 2619 HeapWord *java_lang_ref_Reference::pending_list_lock_addr() { 2620 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass()); 2621 address addr = ik->static_field_addr(static_lock_offset); 2622 return (HeapWord*) addr; 2623 } 2624 2625 oop java_lang_ref_Reference::pending_list_lock() { 2626 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass()); 2627 address addr = ik->static_field_addr(static_lock_offset); 2628 if (UseCompressedOops) { 2629 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 2630 } else { 2631 return oopDesc::load_decode_heap_oop((oop*)addr); 2632 } 2633 } 2634 2635 HeapWord *java_lang_ref_Reference::pending_list_addr() { 2636 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass()); 2637 address addr = ik->static_field_addr(static_pending_offset); 2638 // XXX This might not be HeapWord aligned, almost rather be char *. 2639 return (HeapWord*)addr; 2640 } 2641 2642 oop java_lang_ref_Reference::pending_list() { 2643 char *addr = (char *)pending_list_addr(); 2644 if (UseCompressedOops) { 2645 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 2646 } else { 2647 return oopDesc::load_decode_heap_oop((oop*)addr); 2648 } 2649 } 2650 2651 2652 // Support for java_lang_ref_SoftReference 2653 2654 jlong java_lang_ref_SoftReference::timestamp(oop ref) { 2655 return ref->long_field(timestamp_offset); 2656 } 2657 2658 jlong java_lang_ref_SoftReference::clock() { 2659 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass()); 2660 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset); 2661 return *offset; 2662 } 2663 2664 void java_lang_ref_SoftReference::set_clock(jlong value) { 2665 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass()); 2666 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset); 2667 *offset = value; 2668 } 2669 2670 // Support for java_lang_invoke_DirectMethodHandle 2671 2672 int java_lang_invoke_DirectMethodHandle::_member_offset; 2673 2674 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) { 2675 oop member_name = NULL; 2676 bool is_dmh = dmh->is_oop() && java_lang_invoke_DirectMethodHandle::is_instance(dmh); 2677 assert(is_dmh, "a DirectMethodHandle oop is expected"); 2678 if (is_dmh) { 2679 member_name = dmh->obj_field(member_offset_in_bytes()); 2680 } 2681 return member_name; 2682 } 2683 2684 void java_lang_invoke_DirectMethodHandle::compute_offsets() { 2685 Klass* klass_oop = SystemDictionary::DirectMethodHandle_klass(); 2686 if (klass_oop != NULL) { 2687 compute_offset(_member_offset, klass_oop, vmSymbols::member_name(), vmSymbols::java_lang_invoke_MemberName_signature()); 2688 } 2689 } 2690 2691 // Support for java_lang_invoke_MethodHandle 2692 2693 int java_lang_invoke_MethodHandle::_type_offset; 2694 int java_lang_invoke_MethodHandle::_form_offset; 2695 2696 int java_lang_invoke_MemberName::_clazz_offset; 2697 int java_lang_invoke_MemberName::_name_offset; 2698 int java_lang_invoke_MemberName::_type_offset; 2699 int java_lang_invoke_MemberName::_flags_offset; 2700 int java_lang_invoke_MemberName::_vmtarget_offset; 2701 int java_lang_invoke_MemberName::_vmloader_offset; 2702 int java_lang_invoke_MemberName::_vmindex_offset; 2703 2704 int java_lang_invoke_LambdaForm::_vmentry_offset; 2705 2706 void java_lang_invoke_MethodHandle::compute_offsets() { 2707 Klass* klass_oop = SystemDictionary::MethodHandle_klass(); 2708 if (klass_oop != NULL) { 2709 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature()); 2710 compute_offset(_form_offset, klass_oop, vmSymbols::form_name(), vmSymbols::java_lang_invoke_LambdaForm_signature()); 2711 } 2712 } 2713 2714 void java_lang_invoke_MemberName::compute_offsets() { 2715 Klass* klass_oop = SystemDictionary::MemberName_klass(); 2716 if (klass_oop != NULL) { 2717 compute_offset(_clazz_offset, klass_oop, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2718 compute_offset(_name_offset, klass_oop, vmSymbols::name_name(), vmSymbols::string_signature()); 2719 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::object_signature()); 2720 compute_offset(_flags_offset, klass_oop, vmSymbols::flags_name(), vmSymbols::int_signature()); 2721 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 2722 } 2723 } 2724 2725 void java_lang_invoke_LambdaForm::compute_offsets() { 2726 Klass* klass_oop = SystemDictionary::LambdaForm_klass(); 2727 if (klass_oop != NULL) { 2728 compute_offset(_vmentry_offset, klass_oop, vmSymbols::vmentry_name(), vmSymbols::java_lang_invoke_MemberName_signature()); 2729 } 2730 } 2731 2732 oop java_lang_invoke_MethodHandle::type(oop mh) { 2733 return mh->obj_field(_type_offset); 2734 } 2735 2736 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) { 2737 mh->obj_field_put(_type_offset, mtype); 2738 } 2739 2740 oop java_lang_invoke_MethodHandle::form(oop mh) { 2741 assert(_form_offset != 0, ""); 2742 return mh->obj_field(_form_offset); 2743 } 2744 2745 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) { 2746 assert(_form_offset != 0, ""); 2747 mh->obj_field_put(_form_offset, lform); 2748 } 2749 2750 /// MemberName accessors 2751 2752 oop java_lang_invoke_MemberName::clazz(oop mname) { 2753 assert(is_instance(mname), "wrong type"); 2754 return mname->obj_field(_clazz_offset); 2755 } 2756 2757 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) { 2758 assert(is_instance(mname), "wrong type"); 2759 mname->obj_field_put(_clazz_offset, clazz); 2760 } 2761 2762 oop java_lang_invoke_MemberName::name(oop mname) { 2763 assert(is_instance(mname), "wrong type"); 2764 return mname->obj_field(_name_offset); 2765 } 2766 2767 void java_lang_invoke_MemberName::set_name(oop mname, oop name) { 2768 assert(is_instance(mname), "wrong type"); 2769 mname->obj_field_put(_name_offset, name); 2770 } 2771 2772 oop java_lang_invoke_MemberName::type(oop mname) { 2773 assert(is_instance(mname), "wrong type"); 2774 return mname->obj_field(_type_offset); 2775 } 2776 2777 void java_lang_invoke_MemberName::set_type(oop mname, oop type) { 2778 assert(is_instance(mname), "wrong type"); 2779 mname->obj_field_put(_type_offset, type); 2780 } 2781 2782 int java_lang_invoke_MemberName::flags(oop mname) { 2783 assert(is_instance(mname), "wrong type"); 2784 return mname->int_field(_flags_offset); 2785 } 2786 2787 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) { 2788 assert(is_instance(mname), "wrong type"); 2789 mname->int_field_put(_flags_offset, flags); 2790 } 2791 2792 Metadata* java_lang_invoke_MemberName::vmtarget(oop mname) { 2793 assert(is_instance(mname), "wrong type"); 2794 return (Metadata*)mname->address_field(_vmtarget_offset); 2795 } 2796 2797 #if INCLUDE_JVMTI 2798 // Can be executed on VM thread only 2799 void java_lang_invoke_MemberName::adjust_vmtarget(oop mname, Metadata* ref) { 2800 assert((is_instance(mname) && (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0), "wrong type"); 2801 assert(Thread::current()->is_VM_thread(), "not VM thread"); 2802 mname->address_field_put(_vmtarget_offset, (address)ref); 2803 } 2804 #endif // INCLUDE_JVMTI 2805 2806 void java_lang_invoke_MemberName::set_vmtarget(oop mname, Metadata* ref) { 2807 assert(is_instance(mname), "wrong type"); 2808 // check the type of the vmtarget 2809 oop dependency = NULL; 2810 if (ref != NULL) { 2811 switch (flags(mname) & (MN_IS_METHOD | 2812 MN_IS_CONSTRUCTOR | 2813 MN_IS_FIELD)) { 2814 case MN_IS_METHOD: 2815 case MN_IS_CONSTRUCTOR: 2816 assert(ref->is_method(), "should be a method"); 2817 dependency = ((Method*)ref)->method_holder()->java_mirror(); 2818 break; 2819 case MN_IS_FIELD: 2820 assert(ref->is_klass(), "should be a class"); 2821 dependency = ((Klass*)ref)->java_mirror(); 2822 break; 2823 default: 2824 ShouldNotReachHere(); 2825 } 2826 } 2827 mname->address_field_put(_vmtarget_offset, (address)ref); 2828 // Add a reference to the loader (actually mirror because anonymous classes will not have 2829 // distinct loaders) to ensure the metadata is kept alive 2830 // This mirror may be different than the one in clazz field. 2831 mname->obj_field_put(_vmloader_offset, dependency); 2832 } 2833 2834 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) { 2835 assert(is_instance(mname), "wrong type"); 2836 return (intptr_t) mname->address_field(_vmindex_offset); 2837 } 2838 2839 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) { 2840 assert(is_instance(mname), "wrong type"); 2841 mname->address_field_put(_vmindex_offset, (address) index); 2842 } 2843 2844 oop java_lang_invoke_LambdaForm::vmentry(oop lform) { 2845 assert(is_instance(lform), "wrong type"); 2846 return lform->obj_field(_vmentry_offset); 2847 } 2848 2849 2850 // Support for java_lang_invoke_MethodType 2851 2852 int java_lang_invoke_MethodType::_rtype_offset; 2853 int java_lang_invoke_MethodType::_ptypes_offset; 2854 2855 void java_lang_invoke_MethodType::compute_offsets() { 2856 Klass* k = SystemDictionary::MethodType_klass(); 2857 if (k != NULL) { 2858 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature()); 2859 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature()); 2860 } 2861 } 2862 2863 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) { 2864 st->print("("); 2865 objArrayOop pts = ptypes(mt); 2866 for (int i = 0, limit = pts->length(); i < limit; i++) { 2867 java_lang_Class::print_signature(pts->obj_at(i), st); 2868 } 2869 st->print(")"); 2870 java_lang_Class::print_signature(rtype(mt), st); 2871 } 2872 2873 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) { 2874 ResourceMark rm; 2875 stringStream buffer(128); 2876 print_signature(mt, &buffer); 2877 const char* sigstr = buffer.base(); 2878 int siglen = (int) buffer.size(); 2879 Symbol *name; 2880 if (!intern_if_not_found) { 2881 name = SymbolTable::probe(sigstr, siglen); 2882 } else { 2883 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 2884 } 2885 return name; 2886 } 2887 2888 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) { 2889 if (mt1 == mt2) 2890 return true; 2891 if (rtype(mt1) != rtype(mt2)) 2892 return false; 2893 if (ptype_count(mt1) != ptype_count(mt2)) 2894 return false; 2895 for (int i = ptype_count(mt1) - 1; i >= 0; i--) { 2896 if (ptype(mt1, i) != ptype(mt2, i)) 2897 return false; 2898 } 2899 return true; 2900 } 2901 2902 oop java_lang_invoke_MethodType::rtype(oop mt) { 2903 assert(is_instance(mt), "must be a MethodType"); 2904 return mt->obj_field(_rtype_offset); 2905 } 2906 2907 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) { 2908 assert(is_instance(mt), "must be a MethodType"); 2909 return (objArrayOop) mt->obj_field(_ptypes_offset); 2910 } 2911 2912 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) { 2913 return ptypes(mt)->obj_at(idx); 2914 } 2915 2916 int java_lang_invoke_MethodType::ptype_count(oop mt) { 2917 return ptypes(mt)->length(); 2918 } 2919 2920 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) { 2921 objArrayOop pts = ptypes(mt); 2922 int count = pts->length(); 2923 int slots = 0; 2924 for (int i = 0; i < count; i++) { 2925 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i)); 2926 slots += type2size[bt]; 2927 } 2928 return slots; 2929 } 2930 2931 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) { 2932 BasicType bt = java_lang_Class::as_BasicType(rtype(mt)); 2933 return type2size[bt]; 2934 } 2935 2936 2937 // Support for java_lang_invoke_CallSite 2938 2939 int java_lang_invoke_CallSite::_target_offset; 2940 2941 void java_lang_invoke_CallSite::compute_offsets() { 2942 Klass* k = SystemDictionary::CallSite_klass(); 2943 if (k != NULL) { 2944 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature()); 2945 } 2946 } 2947 2948 2949 // Support for java_security_AccessControlContext 2950 2951 int java_security_AccessControlContext::_context_offset = 0; 2952 int java_security_AccessControlContext::_privilegedContext_offset = 0; 2953 int java_security_AccessControlContext::_isPrivileged_offset = 0; 2954 int java_security_AccessControlContext::_isAuthorized_offset = -1; 2955 2956 void java_security_AccessControlContext::compute_offsets() { 2957 assert(_isPrivileged_offset == 0, "offsets should be initialized only once"); 2958 fieldDescriptor fd; 2959 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass()); 2960 2961 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) { 2962 fatal("Invalid layout of java.security.AccessControlContext"); 2963 } 2964 _context_offset = fd.offset(); 2965 2966 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) { 2967 fatal("Invalid layout of java.security.AccessControlContext"); 2968 } 2969 _privilegedContext_offset = fd.offset(); 2970 2971 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) { 2972 fatal("Invalid layout of java.security.AccessControlContext"); 2973 } 2974 _isPrivileged_offset = fd.offset(); 2975 2976 // The offset may not be present for bootstrapping with older JDK. 2977 if (ik->find_local_field(vmSymbols::isAuthorized_name(), vmSymbols::bool_signature(), &fd)) { 2978 _isAuthorized_offset = fd.offset(); 2979 } 2980 } 2981 2982 2983 bool java_security_AccessControlContext::is_authorized(Handle context) { 2984 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type"); 2985 assert(_isAuthorized_offset != -1, "should be set"); 2986 return context->bool_field(_isAuthorized_offset) != 0; 2987 } 2988 2989 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) { 2990 assert(_isPrivileged_offset != 0, "offsets should have been initialized"); 2991 // Ensure klass is initialized 2992 InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->initialize(CHECK_0); 2993 // Allocate result 2994 oop result = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->allocate_instance(CHECK_0); 2995 // Fill in values 2996 result->obj_field_put(_context_offset, context()); 2997 result->obj_field_put(_privilegedContext_offset, privileged_context()); 2998 result->bool_field_put(_isPrivileged_offset, isPrivileged); 2999 // whitelist AccessControlContexts created by the JVM if present 3000 if (_isAuthorized_offset != -1) { 3001 result->bool_field_put(_isAuthorized_offset, true); 3002 } 3003 return result; 3004 } 3005 3006 3007 // Support for java_lang_ClassLoader 3008 3009 bool java_lang_ClassLoader::offsets_computed = false; 3010 int java_lang_ClassLoader::_loader_data_offset = -1; 3011 int java_lang_ClassLoader::parallelCapable_offset = -1; 3012 3013 ClassLoaderData** java_lang_ClassLoader::loader_data_addr(oop loader) { 3014 assert(loader != NULL && loader->is_oop(), "loader must be oop"); 3015 return (ClassLoaderData**) loader->address_field_addr(_loader_data_offset); 3016 } 3017 3018 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) { 3019 return *java_lang_ClassLoader::loader_data_addr(loader); 3020 } 3021 3022 void java_lang_ClassLoader::compute_offsets() { 3023 assert(!offsets_computed, "offsets should be initialized only once"); 3024 offsets_computed = true; 3025 3026 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7, 3027 Klass* k1 = SystemDictionary::ClassLoader_klass(); 3028 compute_optional_offset(parallelCapable_offset, 3029 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature()); 3030 3031 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3032 } 3033 3034 oop java_lang_ClassLoader::parent(oop loader) { 3035 assert(is_instance(loader), "loader must be oop"); 3036 return loader->obj_field(parent_offset); 3037 } 3038 3039 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) { 3040 assert(is_instance(loader), "loader must be oop"); 3041 assert(cl == NULL || is_instance(cl), "cl argument must be oop"); 3042 oop acl = loader; 3043 debug_only(jint loop_count = 0); 3044 // This loop taken verbatim from ClassLoader.java: 3045 do { 3046 acl = parent(acl); 3047 if (cl == acl) { 3048 return true; 3049 } 3050 assert(++loop_count > 0, "loop_count overflow"); 3051 } while (acl != NULL); 3052 return false; 3053 } 3054 3055 3056 // For class loader classes, parallelCapable defined 3057 // based on non-null field 3058 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it 3059 bool java_lang_ClassLoader::parallelCapable(oop class_loader) { 3060 if (parallelCapable_offset == -1) { 3061 // Default for backward compatibility is false 3062 return false; 3063 } 3064 return (class_loader->obj_field(parallelCapable_offset) != NULL); 3065 } 3066 3067 bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 3068 // Fix for 4474172; see evaluation for more details 3069 loader = non_reflection_class_loader(loader); 3070 3071 oop cl = SystemDictionary::java_system_loader(); 3072 while(cl != NULL) { 3073 if (cl == loader) return true; 3074 cl = parent(cl); 3075 } 3076 return false; 3077 } 3078 3079 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) { 3080 if (loader != NULL) { 3081 // See whether this is one of the class loaders associated with 3082 // the generated bytecodes for reflection, and if so, "magically" 3083 // delegate to its parent to prevent class loading from occurring 3084 // in places where applications using reflection didn't expect it. 3085 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass(); 3086 // This might be null in non-1.4 JDKs 3087 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) { 3088 return parent(loader); 3089 } 3090 } 3091 return loader; 3092 } 3093 3094 3095 // Support for java_lang_System 3096 int java_lang_System::in_offset_in_bytes() { 3097 return (InstanceMirrorKlass::offset_of_static_fields() + static_in_offset); 3098 } 3099 3100 3101 int java_lang_System::out_offset_in_bytes() { 3102 return (InstanceMirrorKlass::offset_of_static_fields() + static_out_offset); 3103 } 3104 3105 3106 int java_lang_System::err_offset_in_bytes() { 3107 return (InstanceMirrorKlass::offset_of_static_fields() + static_err_offset); 3108 } 3109 3110 3111 bool java_lang_System::has_security_manager() { 3112 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::System_klass()); 3113 address addr = ik->static_field_addr(static_security_offset); 3114 if (UseCompressedOops) { 3115 return oopDesc::load_decode_heap_oop((narrowOop *)addr) != NULL; 3116 } else { 3117 return oopDesc::load_decode_heap_oop((oop*)addr) != NULL; 3118 } 3119 } 3120 3121 int java_lang_Class::_klass_offset; 3122 int java_lang_Class::_array_klass_offset; 3123 int java_lang_Class::_oop_size_offset; 3124 int java_lang_Class::_static_oop_field_count_offset; 3125 int java_lang_Class::_class_loader_offset; 3126 int java_lang_Class::_protection_domain_offset; 3127 int java_lang_Class::_component_mirror_offset; 3128 int java_lang_Class::_init_lock_offset; 3129 int java_lang_Class::_signers_offset; 3130 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL; 3131 int java_lang_Throwable::backtrace_offset; 3132 int java_lang_Throwable::detailMessage_offset; 3133 int java_lang_Throwable::cause_offset; 3134 int java_lang_Throwable::stackTrace_offset; 3135 int java_lang_Throwable::static_unassigned_stacktrace_offset; 3136 int java_lang_reflect_AccessibleObject::override_offset; 3137 int java_lang_reflect_Method::clazz_offset; 3138 int java_lang_reflect_Method::name_offset; 3139 int java_lang_reflect_Method::returnType_offset; 3140 int java_lang_reflect_Method::parameterTypes_offset; 3141 int java_lang_reflect_Method::exceptionTypes_offset; 3142 int java_lang_reflect_Method::slot_offset; 3143 int java_lang_reflect_Method::modifiers_offset; 3144 int java_lang_reflect_Method::signature_offset; 3145 int java_lang_reflect_Method::annotations_offset; 3146 int java_lang_reflect_Method::parameter_annotations_offset; 3147 int java_lang_reflect_Method::annotation_default_offset; 3148 int java_lang_reflect_Method::type_annotations_offset; 3149 int java_lang_reflect_Constructor::clazz_offset; 3150 int java_lang_reflect_Constructor::parameterTypes_offset; 3151 int java_lang_reflect_Constructor::exceptionTypes_offset; 3152 int java_lang_reflect_Constructor::slot_offset; 3153 int java_lang_reflect_Constructor::modifiers_offset; 3154 int java_lang_reflect_Constructor::signature_offset; 3155 int java_lang_reflect_Constructor::annotations_offset; 3156 int java_lang_reflect_Constructor::parameter_annotations_offset; 3157 int java_lang_reflect_Constructor::type_annotations_offset; 3158 int java_lang_reflect_Field::clazz_offset; 3159 int java_lang_reflect_Field::name_offset; 3160 int java_lang_reflect_Field::type_offset; 3161 int java_lang_reflect_Field::slot_offset; 3162 int java_lang_reflect_Field::modifiers_offset; 3163 int java_lang_reflect_Field::signature_offset; 3164 int java_lang_reflect_Field::annotations_offset; 3165 int java_lang_reflect_Field::type_annotations_offset; 3166 int java_lang_reflect_Parameter::name_offset; 3167 int java_lang_reflect_Parameter::modifiers_offset; 3168 int java_lang_reflect_Parameter::index_offset; 3169 int java_lang_reflect_Parameter::executable_offset; 3170 int java_lang_boxing_object::value_offset; 3171 int java_lang_boxing_object::long_value_offset; 3172 int java_lang_ref_Reference::referent_offset; 3173 int java_lang_ref_Reference::queue_offset; 3174 int java_lang_ref_Reference::next_offset; 3175 int java_lang_ref_Reference::discovered_offset; 3176 int java_lang_ref_Reference::static_lock_offset; 3177 int java_lang_ref_Reference::static_pending_offset; 3178 int java_lang_ref_Reference::number_of_fake_oop_fields; 3179 int java_lang_ref_SoftReference::timestamp_offset; 3180 int java_lang_ref_SoftReference::static_clock_offset; 3181 int java_lang_ClassLoader::parent_offset; 3182 int java_lang_System::static_in_offset; 3183 int java_lang_System::static_out_offset; 3184 int java_lang_System::static_err_offset; 3185 int java_lang_System::static_security_offset; 3186 int java_lang_StackTraceElement::declaringClass_offset; 3187 int java_lang_StackTraceElement::methodName_offset; 3188 int java_lang_StackTraceElement::fileName_offset; 3189 int java_lang_StackTraceElement::lineNumber_offset; 3190 int java_lang_AssertionStatusDirectives::classes_offset; 3191 int java_lang_AssertionStatusDirectives::classEnabled_offset; 3192 int java_lang_AssertionStatusDirectives::packages_offset; 3193 int java_lang_AssertionStatusDirectives::packageEnabled_offset; 3194 int java_lang_AssertionStatusDirectives::deflt_offset; 3195 int java_nio_Buffer::_limit_offset; 3196 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0; 3197 int sun_reflect_ConstantPool::_oop_offset; 3198 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset; 3199 3200 3201 // Support for java_lang_StackTraceElement 3202 3203 void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 3204 element->obj_field_put(fileName_offset, value); 3205 } 3206 3207 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 3208 element->obj_field_put(declaringClass_offset, value); 3209 } 3210 3211 void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 3212 element->obj_field_put(methodName_offset, value); 3213 } 3214 3215 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 3216 element->int_field_put(lineNumber_offset, value); 3217 } 3218 3219 3220 // Support for java Assertions - java_lang_AssertionStatusDirectives. 3221 3222 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 3223 o->obj_field_put(classes_offset, val); 3224 } 3225 3226 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 3227 o->obj_field_put(classEnabled_offset, val); 3228 } 3229 3230 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 3231 o->obj_field_put(packages_offset, val); 3232 } 3233 3234 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 3235 o->obj_field_put(packageEnabled_offset, val); 3236 } 3237 3238 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 3239 o->bool_field_put(deflt_offset, val); 3240 } 3241 3242 3243 // Support for intrinsification of java.nio.Buffer.checkIndex 3244 int java_nio_Buffer::limit_offset() { 3245 return _limit_offset; 3246 } 3247 3248 3249 void java_nio_Buffer::compute_offsets() { 3250 Klass* k = SystemDictionary::nio_Buffer_klass(); 3251 assert(k != NULL, "must be loaded in 1.4+"); 3252 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature()); 3253 } 3254 3255 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) { 3256 if (_owner_offset != 0) return; 3257 3258 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK); 3259 Klass* k = SystemDictionary::abstract_ownable_synchronizer_klass(); 3260 compute_offset(_owner_offset, k, 3261 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature()); 3262 } 3263 3264 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 3265 assert(_owner_offset != 0, "Must be initialized"); 3266 return obj->obj_field(_owner_offset); 3267 } 3268 3269 // Compute hard-coded offsets 3270 // Invoked before SystemDictionary::initialize, so pre-loaded classes 3271 // are not available to determine the offset_of_static_fields. 3272 void JavaClasses::compute_hard_coded_offsets() { 3273 const int x = heapOopSize; 3274 const int header = instanceOopDesc::base_offset_in_bytes(); 3275 3276 // Throwable Class 3277 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header; 3278 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header; 3279 java_lang_Throwable::cause_offset = java_lang_Throwable::hc_cause_offset * x + header; 3280 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header; 3281 java_lang_Throwable::static_unassigned_stacktrace_offset = java_lang_Throwable::hc_static_unassigned_stacktrace_offset * x; 3282 3283 // java_lang_boxing_object 3284 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header; 3285 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong); 3286 3287 // java_lang_ref_Reference: 3288 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header; 3289 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header; 3290 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header; 3291 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header; 3292 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x; 3293 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x; 3294 // Artificial fields for java_lang_ref_Reference 3295 // The first field is for the discovered field added in 1.4 3296 java_lang_ref_Reference::number_of_fake_oop_fields = 1; 3297 3298 // java_lang_ref_SoftReference Class 3299 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong); 3300 // Don't multiply static fields because they are always in wordSize units 3301 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x; 3302 3303 // java_lang_ClassLoader 3304 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header; 3305 3306 // java_lang_System 3307 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x; 3308 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x; 3309 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x; 3310 java_lang_System::static_security_offset = java_lang_System::hc_static_security_offset * x; 3311 3312 // java_lang_StackTraceElement 3313 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header; 3314 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header; 3315 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header; 3316 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header; 3317 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header; 3318 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header; 3319 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header; 3320 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header; 3321 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header; 3322 3323 } 3324 3325 3326 // Compute non-hard-coded field offsets of all the classes in this file 3327 void JavaClasses::compute_offsets() { 3328 // java_lang_Class::compute_offsets was called earlier in bootstrap 3329 java_lang_ClassLoader::compute_offsets(); 3330 java_lang_Thread::compute_offsets(); 3331 java_lang_ThreadGroup::compute_offsets(); 3332 java_lang_invoke_MethodHandle::compute_offsets(); 3333 java_lang_invoke_DirectMethodHandle::compute_offsets(); 3334 java_lang_invoke_MemberName::compute_offsets(); 3335 java_lang_invoke_LambdaForm::compute_offsets(); 3336 java_lang_invoke_MethodType::compute_offsets(); 3337 java_lang_invoke_CallSite::compute_offsets(); 3338 java_security_AccessControlContext::compute_offsets(); 3339 // Initialize reflection classes. The layouts of these classes 3340 // changed with the new reflection implementation in JDK 1.4, and 3341 // since the Universe doesn't know what JDK version it is until this 3342 // point we defer computation of these offsets until now. 3343 java_lang_reflect_AccessibleObject::compute_offsets(); 3344 java_lang_reflect_Method::compute_offsets(); 3345 java_lang_reflect_Constructor::compute_offsets(); 3346 java_lang_reflect_Field::compute_offsets(); 3347 java_nio_Buffer::compute_offsets(); 3348 sun_reflect_ConstantPool::compute_offsets(); 3349 sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets(); 3350 java_lang_reflect_Parameter::compute_offsets(); 3351 3352 // generated interpreter code wants to know about the offsets we just computed: 3353 AbstractAssembler::update_delayed_values(); 3354 } 3355 3356 #ifndef PRODUCT 3357 3358 // These functions exist to assert the validity of hard-coded field offsets to guard 3359 // against changes in the class files 3360 3361 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 3362 EXCEPTION_MARK; 3363 fieldDescriptor fd; 3364 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3365 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3366 instanceKlassHandle h_klass (THREAD, k); 3367 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3368 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3369 if (!h_klass->find_local_field(f_name, f_sig, &fd)) { 3370 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 3371 return false; 3372 } 3373 if (fd.is_static()) { 3374 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 3375 return false; 3376 } 3377 if (fd.offset() == hardcoded_offset ) { 3378 return true; 3379 } else { 3380 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.", 3381 klass_name, field_name, hardcoded_offset, fd.offset()); 3382 return false; 3383 } 3384 } 3385 3386 3387 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 3388 EXCEPTION_MARK; 3389 fieldDescriptor fd; 3390 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3391 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3392 instanceKlassHandle h_klass (THREAD, k); 3393 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3394 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3395 if (!h_klass->find_local_field(f_name, f_sig, &fd)) { 3396 tty->print_cr("Static field %s.%s not found", klass_name, field_name); 3397 return false; 3398 } 3399 if (!fd.is_static()) { 3400 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name); 3401 return false; 3402 } 3403 if (fd.offset() == hardcoded_offset + InstanceMirrorKlass::offset_of_static_fields()) { 3404 return true; 3405 } else { 3406 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()); 3407 return false; 3408 } 3409 } 3410 3411 3412 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, 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("Static field %s.%s not found", klass_name, field_name); 3422 return false; 3423 } 3424 if (!fd.is_static() || !fd.has_initial_value()) { 3425 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name); 3426 return false; 3427 } 3428 if (!fd.initial_value_tag().is_int()) { 3429 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name); 3430 return false; 3431 } 3432 jint field_value = fd.int_initial_value(); 3433 if (field_value == hardcoded_constant) { 3434 return true; 3435 } else { 3436 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); 3437 return false; 3438 } 3439 } 3440 3441 3442 // Check the hard-coded field offsets of all the classes in this file 3443 3444 void JavaClasses::check_offsets() { 3445 bool valid = true; 3446 HandleMark hm; 3447 3448 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3449 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig) 3450 3451 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3452 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig) 3453 3454 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3455 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig) 3456 3457 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \ 3458 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig) 3459 3460 // java.lang.String 3461 3462 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C"); 3463 if (java_lang_String::has_offset_field()) { 3464 CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I"); 3465 CHECK_OFFSET("java/lang/String", java_lang_String, count, "I"); 3466 } 3467 if (java_lang_String::has_hash_field()) { 3468 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I"); 3469 } 3470 3471 // java.lang.Class 3472 3473 // Fake fields 3474 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked 3475 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked 3476 3477 // java.lang.Throwable 3478 3479 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;"); 3480 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;"); 3481 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;"); 3482 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;"); 3483 3484 // Boxed primitive objects (java_lang_boxing_object) 3485 3486 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 3487 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 3488 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 3489 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 3490 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 3491 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 3492 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 3493 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 3494 3495 // java.lang.ClassLoader 3496 3497 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;"); 3498 3499 // java.lang.System 3500 3501 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;"); 3502 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;"); 3503 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;"); 3504 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, security, "Ljava/lang/SecurityManager;"); 3505 3506 // java.lang.StackTraceElement 3507 3508 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;"); 3509 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;"); 3510 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;"); 3511 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I"); 3512 3513 // java.lang.ref.Reference 3514 3515 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;"); 3516 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;"); 3517 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;"); 3518 // Fake field 3519 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;"); 3520 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;"); 3521 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;"); 3522 3523 // java.lang.ref.SoftReference 3524 3525 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J"); 3526 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J"); 3527 3528 // java.lang.AssertionStatusDirectives 3529 // 3530 // The CheckAssertionStatusDirectives boolean can be removed from here and 3531 // globals.hpp after the AssertionStatusDirectives class has been integrated 3532 // into merlin "for some time." Without it, the vm will fail with early 3533 // merlin builds. 3534 3535 if (CheckAssertionStatusDirectives) { 3536 const char* nm = "java/lang/AssertionStatusDirectives"; 3537 const char* sig = "[Ljava/lang/String;"; 3538 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig); 3539 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z"); 3540 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig); 3541 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z"); 3542 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z"); 3543 } 3544 3545 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed"); 3546 } 3547 3548 #endif // PRODUCT 3549 3550 int InjectedField::compute_offset() { 3551 Klass* klass_oop = klass(); 3552 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) { 3553 if (!may_be_java && !fs.access_flags().is_internal()) { 3554 // Only look at injected fields 3555 continue; 3556 } 3557 if (fs.name() == name() && fs.signature() == signature()) { 3558 return fs.offset(); 3559 } 3560 } 3561 ResourceMark rm; 3562 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)" : ""); 3563 #ifndef PRODUCT 3564 klass_oop->print(); 3565 tty->print_cr("all fields:"); 3566 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) { 3567 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 3568 } 3569 #endif //PRODUCT 3570 fatal("Invalid layout of preloaded class"); 3571 return -1; 3572 } 3573 3574 void javaClasses_init() { 3575 JavaClasses::compute_offsets(); 3576 JavaClasses::check_offsets(); 3577 FilteredFieldsMap::initialize(); // must be done after computing offsets. 3578 }