1 /* 2 * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "classfile/altHashing.hpp" 27 #include "classfile/javaClasses.hpp" 28 #include "classfile/symbolTable.hpp" 29 #include "classfile/vmSymbols.hpp" 30 #include "code/debugInfo.hpp" 31 #include "code/pcDesc.hpp" 32 #include "compiler/compilerOracle.hpp" 33 #include "interpreter/interpreter.hpp" 34 #include "memory/oopFactory.hpp" 35 #include "memory/resourceArea.hpp" 36 #include "memory/universe.inline.hpp" 37 #include "oops/fieldStreams.hpp" 38 #include "oops/instanceKlass.hpp" 39 #include "oops/instanceMirrorKlass.hpp" 40 #include "oops/klass.hpp" 41 #include "oops/method.hpp" 42 #include "oops/symbol.hpp" 43 #include "oops/typeArrayOop.hpp" 44 #include "prims/jvmtiRedefineClassesTrace.hpp" 45 #include "runtime/fieldDescriptor.hpp" 46 #include "runtime/handles.inline.hpp" 47 #include "runtime/interfaceSupport.hpp" 48 #include "runtime/java.hpp" 49 #include "runtime/javaCalls.hpp" 50 #include "runtime/safepoint.hpp" 51 #include "runtime/thread.inline.hpp" 52 #include "runtime/vframe.hpp" 53 #include "utilities/preserveException.hpp" 54 55 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC 56 57 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \ 58 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum); 59 60 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \ 61 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java }, 62 63 InjectedField JavaClasses::_injected_fields[] = { 64 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD) 65 }; 66 67 int JavaClasses::compute_injected_offset(InjectedFieldID id) { 68 return _injected_fields[id].compute_offset(); 69 } 70 71 72 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) { 73 *field_count = 0; 74 75 vmSymbols::SID sid = vmSymbols::find_sid(class_name); 76 if (sid == vmSymbols::NO_SID) { 77 // Only well known classes can inject fields 78 return NULL; 79 } 80 81 int count = 0; 82 int start = -1; 83 84 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \ 85 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \ 86 count++; \ 87 if (start == -1) start = klass##_##name##_enum; \ 88 } 89 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD); 90 #undef LOOKUP_INJECTED_FIELD 91 92 if (start != -1) { 93 *field_count = count; 94 return _injected_fields + start; 95 } 96 return NULL; 97 } 98 99 100 static bool find_field(InstanceKlass* ik, 101 Symbol* name_symbol, Symbol* signature_symbol, 102 fieldDescriptor* fd, 103 bool allow_super = false) { 104 if (allow_super) 105 return ik->find_field(name_symbol, signature_symbol, fd) != NULL; 106 else 107 return ik->find_local_field(name_symbol, signature_symbol, fd); 108 } 109 110 // Helpful routine for computing field offsets at run time rather than hardcoding them 111 static void 112 compute_offset(int &dest_offset, 113 Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol, 114 bool allow_super = false) { 115 fieldDescriptor fd; 116 InstanceKlass* ik = InstanceKlass::cast(klass_oop); 117 if (!find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) { 118 ResourceMark rm; 119 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string()); 120 #ifndef PRODUCT 121 klass_oop->print(); 122 tty->print_cr("all fields:"); 123 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) { 124 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 125 } 126 #endif //PRODUCT 127 vm_exit_during_initialization("Invalid layout of preloaded class: use -XX:+TraceClassLoading to see the origin of the problem class"); 128 } 129 dest_offset = fd.offset(); 130 } 131 132 // Same as above but for "optional" offsets that might not be present in certain JDK versions 133 static void 134 compute_optional_offset(int& dest_offset, 135 Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol, 136 bool allow_super = false) { 137 fieldDescriptor fd; 138 InstanceKlass* ik = InstanceKlass::cast(klass_oop); 139 if (find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) { 140 dest_offset = fd.offset(); 141 } 142 } 143 144 145 int java_lang_String::value_offset = 0; 146 int java_lang_String::offset_offset = 0; 147 int java_lang_String::count_offset = 0; 148 int java_lang_String::hash_offset = 0; 149 150 bool java_lang_String::initialized = false; 151 152 void java_lang_String::compute_offsets() { 153 assert(!initialized, "offsets should be initialized only once"); 154 155 Klass* k = SystemDictionary::String_klass(); 156 compute_offset(value_offset, k, vmSymbols::value_name(), vmSymbols::char_array_signature()); 157 compute_optional_offset(offset_offset, k, vmSymbols::offset_name(), vmSymbols::int_signature()); 158 compute_optional_offset(count_offset, k, vmSymbols::count_name(), vmSymbols::int_signature()); 159 compute_optional_offset(hash_offset, k, vmSymbols::hash_name(), vmSymbols::int_signature()); 160 161 initialized = true; 162 } 163 164 Handle java_lang_String::basic_create(int length, TRAPS) { 165 assert(initialized, "Must be initialized"); 166 // Create the String object first, so there's a chance that the String 167 // and the char array it points to end up in the same cache line. 168 oop obj; 169 obj = InstanceKlass::cast(SystemDictionary::String_klass())->allocate_instance(CHECK_NH); 170 171 // Create the char array. The String object must be handlized here 172 // because GC can happen as a result of the allocation attempt. 173 Handle h_obj(THREAD, obj); 174 typeArrayOop buffer; 175 buffer = oopFactory::new_charArray(length, CHECK_NH); 176 177 // Point the String at the char array 178 obj = h_obj(); 179 set_value(obj, buffer); 180 // No need to zero the offset, allocation zero'ed the entire String object 181 assert(offset(obj) == 0, "initial String offset should be zero"); 182 //set_offset(obj, 0); 183 set_count(obj, length); 184 185 return h_obj; 186 } 187 188 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) { 189 Handle h_obj = basic_create(length, CHECK_NH); 190 typeArrayOop buffer = value(h_obj()); 191 for (int index = 0; index < length; index++) { 192 buffer->char_at_put(index, unicode[index]); 193 } 194 return h_obj; 195 } 196 197 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) { 198 Handle h_obj = create_from_unicode(unicode, length, CHECK_0); 199 return h_obj(); 200 } 201 202 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) { 203 if (utf8_str == NULL) { 204 return Handle(); 205 } 206 int length = UTF8::unicode_length(utf8_str); 207 Handle h_obj = basic_create(length, CHECK_NH); 208 if (length > 0) { 209 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 210 } 211 return h_obj; 212 } 213 214 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) { 215 Handle h_obj = create_from_str(utf8_str, CHECK_0); 216 return h_obj(); 217 } 218 219 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) { 220 int length = UTF8::unicode_length((char*)symbol->bytes(), symbol->utf8_length()); 221 Handle h_obj = basic_create(length, CHECK_NH); 222 if (length > 0) { 223 UTF8::convert_to_unicode((char*)symbol->bytes(), value(h_obj())->char_at_addr(0), length); 224 } 225 return h_obj; 226 } 227 228 // Converts a C string to a Java String based on current encoding 229 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) { 230 assert(str != NULL, "bad arguments"); 231 232 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *); 233 static to_java_string_fn_t _to_java_string_fn = NULL; 234 235 if (_to_java_string_fn == NULL) { 236 void *lib_handle = os::native_java_library(); 237 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform")); 238 if (_to_java_string_fn == NULL) { 239 fatal("NewStringPlatform missing"); 240 } 241 } 242 243 jstring js = NULL; 244 { JavaThread* thread = (JavaThread*)THREAD; 245 assert(thread->is_Java_thread(), "must be java thread"); 246 HandleMark hm(thread); 247 ThreadToNativeFromVM ttn(thread); 248 js = (_to_java_string_fn)(thread->jni_environment(), str); 249 } 250 return Handle(THREAD, JNIHandles::resolve(js)); 251 } 252 253 // Converts a Java String to a native C string that can be used for 254 // native OS calls. 255 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) { 256 257 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*); 258 static to_platform_string_fn_t _to_platform_string_fn = NULL; 259 260 if (_to_platform_string_fn == NULL) { 261 void *lib_handle = os::native_java_library(); 262 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars")); 263 if (_to_platform_string_fn == NULL) { 264 fatal("GetStringPlatformChars missing"); 265 } 266 } 267 268 char *native_platform_string; 269 { JavaThread* thread = (JavaThread*)THREAD; 270 assert(thread->is_Java_thread(), "must be java thread"); 271 JNIEnv *env = thread->jni_environment(); 272 jstring js = (jstring) JNIHandles::make_local(env, java_string()); 273 bool is_copy; 274 HandleMark hm(thread); 275 ThreadToNativeFromVM ttn(thread); 276 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy); 277 assert(is_copy == JNI_TRUE, "is_copy value changed"); 278 JNIHandles::destroy_local(js); 279 } 280 return native_platform_string; 281 } 282 283 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) { 284 oop obj = java_string(); 285 // Typical usage is to convert all '/' to '.' in string. 286 typeArrayOop value = java_lang_String::value(obj); 287 int offset = java_lang_String::offset(obj); 288 int length = java_lang_String::length(obj); 289 290 // First check if any from_char exist 291 int index; // Declared outside, used later 292 for (index = 0; index < length; index++) { 293 if (value->char_at(index + offset) == from_char) { 294 break; 295 } 296 } 297 if (index == length) { 298 // No from_char, so do not copy. 299 return java_string; 300 } 301 302 // Create new UNICODE buffer. Must handlize value because GC 303 // may happen during String and char array creation. 304 typeArrayHandle h_value(THREAD, value); 305 Handle string = basic_create(length, CHECK_NH); 306 307 typeArrayOop from_buffer = h_value(); 308 typeArrayOop to_buffer = java_lang_String::value(string()); 309 310 // Copy contents 311 for (index = 0; index < length; index++) { 312 jchar c = from_buffer->char_at(index + offset); 313 if (c == from_char) { 314 c = to_char; 315 } 316 to_buffer->char_at_put(index, c); 317 } 318 return string; 319 } 320 321 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) { 322 typeArrayOop value = java_lang_String::value(java_string); 323 int offset = java_lang_String::offset(java_string); 324 length = java_lang_String::length(java_string); 325 326 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length); 327 if (result != NULL) { 328 for (int index = 0; index < length; index++) { 329 result[index] = value->char_at(index + offset); 330 } 331 } else { 332 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string"); 333 } 334 return result; 335 } 336 337 unsigned int java_lang_String::hash_code(oop java_string) { 338 int length = java_lang_String::length(java_string); 339 // Zero length string will hash to zero with String.hashCode() function. 340 if (length == 0) return 0; 341 342 typeArrayOop value = java_lang_String::value(java_string); 343 int offset = java_lang_String::offset(java_string); 344 return java_lang_String::hash_code(value->char_at_addr(offset), length); 345 } 346 347 char* java_lang_String::as_quoted_ascii(oop java_string) { 348 typeArrayOop value = java_lang_String::value(java_string); 349 int offset = java_lang_String::offset(java_string); 350 int length = java_lang_String::length(java_string); 351 352 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset); 353 if (base == NULL) return NULL; 354 355 int result_length = UNICODE::quoted_ascii_length(base, length) + 1; 356 char* result = NEW_RESOURCE_ARRAY(char, result_length); 357 UNICODE::as_quoted_ascii(base, length, result, result_length); 358 assert(result_length >= length + 1, "must not be shorter"); 359 assert(result_length == (int)strlen(result) + 1, "must match"); 360 return result; 361 } 362 363 unsigned int java_lang_String::hash_string(oop java_string) { 364 int length = java_lang_String::length(java_string); 365 // Zero length string doesn't hash necessarily hash to zero. 366 if (length == 0) { 367 return StringTable::hash_string(NULL, 0); 368 } 369 370 typeArrayOop value = java_lang_String::value(java_string); 371 int offset = java_lang_String::offset(java_string); 372 return StringTable::hash_string(value->char_at_addr(offset), length); 373 } 374 375 Symbol* java_lang_String::as_symbol(Handle java_string, TRAPS) { 376 oop obj = java_string(); 377 typeArrayOop value = java_lang_String::value(obj); 378 int offset = java_lang_String::offset(obj); 379 int length = java_lang_String::length(obj); 380 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset); 381 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD); 382 return sym; 383 } 384 385 Symbol* java_lang_String::as_symbol_or_null(oop java_string) { 386 typeArrayOop value = java_lang_String::value(java_string); 387 int offset = java_lang_String::offset(java_string); 388 int length = java_lang_String::length(java_string); 389 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset); 390 return SymbolTable::probe_unicode(base, length); 391 } 392 393 394 int java_lang_String::utf8_length(oop java_string) { 395 typeArrayOop value = java_lang_String::value(java_string); 396 int offset = java_lang_String::offset(java_string); 397 int length = java_lang_String::length(java_string); 398 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset); 399 return UNICODE::utf8_length(position, length); 400 } 401 402 char* java_lang_String::as_utf8_string(oop java_string) { 403 typeArrayOop value = java_lang_String::value(java_string); 404 int offset = java_lang_String::offset(java_string); 405 int length = java_lang_String::length(java_string); 406 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset); 407 return UNICODE::as_utf8(position, length); 408 } 409 410 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) { 411 typeArrayOop value = java_lang_String::value(java_string); 412 int offset = java_lang_String::offset(java_string); 413 int length = java_lang_String::length(java_string); 414 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset); 415 return UNICODE::as_utf8(position, length, buf, buflen); 416 } 417 418 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) { 419 typeArrayOop value = java_lang_String::value(java_string); 420 int offset = java_lang_String::offset(java_string); 421 int length = java_lang_String::length(java_string); 422 assert(start + len <= length, "just checking"); 423 jchar* position = value->char_at_addr(offset + start); 424 return UNICODE::as_utf8(position, len); 425 } 426 427 bool java_lang_String::equals(oop java_string, jchar* chars, int len) { 428 assert(java_string->klass() == SystemDictionary::String_klass(), 429 "must be java_string"); 430 typeArrayOop value = java_lang_String::value(java_string); 431 int offset = java_lang_String::offset(java_string); 432 int length = java_lang_String::length(java_string); 433 if (length != len) { 434 return false; 435 } 436 for (int i = 0; i < len; i++) { 437 if (value->char_at(i + offset) != chars[i]) { 438 return false; 439 } 440 } 441 return true; 442 } 443 444 bool java_lang_String::equals(oop str1, oop str2) { 445 assert(str1->klass() == SystemDictionary::String_klass(), 446 "must be java String"); 447 assert(str2->klass() == SystemDictionary::String_klass(), 448 "must be java String"); 449 typeArrayOop value1 = java_lang_String::value(str1); 450 int offset1 = java_lang_String::offset(str1); 451 int length1 = java_lang_String::length(str1); 452 typeArrayOop value2 = java_lang_String::value(str2); 453 int offset2 = java_lang_String::offset(str2); 454 int length2 = java_lang_String::length(str2); 455 456 if (length1 != length2) { 457 return false; 458 } 459 for (int i = 0; i < length1; i++) { 460 if (value1->char_at(i + offset1) != value2->char_at(i + offset2)) { 461 return false; 462 } 463 } 464 return true; 465 } 466 467 void java_lang_String::print(oop java_string, outputStream* st) { 468 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string"); 469 typeArrayOop value = java_lang_String::value(java_string); 470 int offset = java_lang_String::offset(java_string); 471 int length = java_lang_String::length(java_string); 472 473 int end = MIN2(length, 100); 474 if (value == NULL) { 475 // This can happen if, e.g., printing a String 476 // object before its initializer has been called 477 st->print_cr("NULL"); 478 } else { 479 st->print("\""); 480 for (int index = 0; index < length; index++) { 481 st->print("%c", value->char_at(index + offset)); 482 } 483 st->print("\""); 484 } 485 } 486 487 488 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 489 assert(mirror.not_null() && fd->is_static(), "just checking"); 490 if (fd->has_initial_value()) { 491 BasicType t = fd->field_type(); 492 switch (t) { 493 case T_BYTE: 494 mirror()->byte_field_put(fd->offset(), fd->int_initial_value()); 495 break; 496 case T_BOOLEAN: 497 mirror()->bool_field_put(fd->offset(), fd->int_initial_value()); 498 break; 499 case T_CHAR: 500 mirror()->char_field_put(fd->offset(), fd->int_initial_value()); 501 break; 502 case T_SHORT: 503 mirror()->short_field_put(fd->offset(), fd->int_initial_value()); 504 break; 505 case T_INT: 506 mirror()->int_field_put(fd->offset(), fd->int_initial_value()); 507 break; 508 case T_FLOAT: 509 mirror()->float_field_put(fd->offset(), fd->float_initial_value()); 510 break; 511 case T_DOUBLE: 512 mirror()->double_field_put(fd->offset(), fd->double_initial_value()); 513 break; 514 case T_LONG: 515 mirror()->long_field_put(fd->offset(), fd->long_initial_value()); 516 break; 517 case T_OBJECT: 518 { 519 #ifdef ASSERT 520 TempNewSymbol sym = SymbolTable::new_symbol("Ljava/lang/String;", CHECK); 521 assert(fd->signature() == sym, "just checking"); 522 #endif 523 oop string = fd->string_initial_value(CHECK); 524 mirror()->obj_field_put(fd->offset(), string); 525 } 526 break; 527 default: 528 THROW_MSG(vmSymbols::java_lang_ClassFormatError(), 529 "Illegal ConstantValue attribute in class file"); 530 } 531 } 532 } 533 534 535 void java_lang_Class::fixup_mirror(KlassHandle k, TRAPS) { 536 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already"); 537 538 // If the offset was read from the shared archive, it was fixed up already 539 if (!k->is_shared()) { 540 if (k->oop_is_instance()) { 541 // During bootstrap, java.lang.Class wasn't loaded so static field 542 // offsets were computed without the size added it. Go back and 543 // update all the static field offsets to included the size. 544 for (JavaFieldStream fs(InstanceKlass::cast(k())); !fs.done(); fs.next()) { 545 if (fs.access_flags().is_static()) { 546 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields(); 547 fs.set_offset(real_offset); 548 } 549 } 550 } 551 } 552 create_mirror(k, Handle(NULL), Handle(NULL), CHECK); 553 } 554 555 void java_lang_Class::initialize_mirror_fields(KlassHandle k, 556 Handle mirror, 557 Handle protection_domain, 558 TRAPS) { 559 // Allocate a simple java object for a lock. 560 // This needs to be a java object because during class initialization 561 // it can be held across a java call. 562 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK); 563 set_init_lock(mirror(), r); 564 565 // Set protection domain also 566 set_protection_domain(mirror(), protection_domain()); 567 568 // Initialize static fields 569 InstanceKlass::cast(k())->do_local_static_fields(&initialize_static_field, mirror, CHECK); 570 } 571 572 void java_lang_Class::create_mirror(KlassHandle k, Handle class_loader, 573 Handle protection_domain, TRAPS) { 574 assert(k->java_mirror() == NULL, "should only assign mirror once"); 575 // Use this moment of initialization to cache modifier_flags also, 576 // to support Class.getModifiers(). Instance classes recalculate 577 // the cached flags after the class file is parsed, but before the 578 // class is put into the system dictionary. 579 int computed_modifiers = k->compute_modifier_flags(CHECK); 580 k->set_modifier_flags(computed_modifiers); 581 // Class_klass has to be loaded because it is used to allocate 582 // the mirror. 583 if (SystemDictionary::Class_klass_loaded()) { 584 // Allocate mirror (java.lang.Class instance) 585 Handle mirror = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK); 586 587 // Setup indirection from mirror->klass 588 if (!k.is_null()) { 589 java_lang_Class::set_klass(mirror(), k()); 590 } 591 592 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass()); 593 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set"); 594 595 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror())); 596 597 // It might also have a component mirror. This mirror must already exist. 598 if (k->oop_is_array()) { 599 Handle comp_mirror; 600 if (k->oop_is_typeArray()) { 601 BasicType type = TypeArrayKlass::cast(k())->element_type(); 602 comp_mirror = Universe::java_mirror(type); 603 } else { 604 assert(k->oop_is_objArray(), "Must be"); 605 Klass* element_klass = ObjArrayKlass::cast(k())->element_klass(); 606 assert(element_klass != NULL, "Must have an element klass"); 607 comp_mirror = element_klass->java_mirror(); 608 } 609 assert(comp_mirror.not_null(), "must have a mirror"); 610 611 // Two-way link between the array klass and its component mirror: 612 ArrayKlass::cast(k())->set_component_mirror(comp_mirror()); 613 set_array_klass(comp_mirror(), k()); 614 } else { 615 assert(k->oop_is_instance(), "Must be"); 616 617 initialize_mirror_fields(k, mirror, protection_domain, THREAD); 618 if (HAS_PENDING_EXCEPTION) { 619 // If any of the fields throws an exception like OOM remove the klass field 620 // from the mirror so GC doesn't follow it after the klass has been deallocated. 621 // This mirror looks like a primitive type, which logically it is because it 622 // it represents no class. 623 java_lang_Class::set_klass(mirror(), NULL); 624 return; 625 } 626 } 627 628 // set the classLoader field in the java_lang_Class instance 629 assert(class_loader() == k->class_loader(), "should be same"); 630 set_class_loader(mirror(), class_loader()); 631 632 // Setup indirection from klass->mirror last 633 // after any exceptions can happen during allocations. 634 if (!k.is_null()) { 635 k->set_java_mirror(mirror()); 636 } 637 } else { 638 if (fixup_mirror_list() == NULL) { 639 GrowableArray<Klass*>* list = 640 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true); 641 set_fixup_mirror_list(list); 642 } 643 fixup_mirror_list()->push(k()); 644 } 645 } 646 647 648 int java_lang_Class::oop_size(oop java_class) { 649 assert(_oop_size_offset != 0, "must be set"); 650 return java_class->int_field(_oop_size_offset); 651 } 652 void java_lang_Class::set_oop_size(oop java_class, int size) { 653 assert(_oop_size_offset != 0, "must be set"); 654 java_class->int_field_put(_oop_size_offset, size); 655 } 656 int java_lang_Class::static_oop_field_count(oop java_class) { 657 assert(_static_oop_field_count_offset != 0, "must be set"); 658 return java_class->int_field(_static_oop_field_count_offset); 659 } 660 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) { 661 assert(_static_oop_field_count_offset != 0, "must be set"); 662 java_class->int_field_put(_static_oop_field_count_offset, size); 663 } 664 665 oop java_lang_Class::protection_domain(oop java_class) { 666 assert(_protection_domain_offset != 0, "must be set"); 667 return java_class->obj_field(_protection_domain_offset); 668 } 669 void java_lang_Class::set_protection_domain(oop java_class, oop pd) { 670 assert(_protection_domain_offset != 0, "must be set"); 671 java_class->obj_field_put(_protection_domain_offset, pd); 672 } 673 674 oop java_lang_Class::init_lock(oop java_class) { 675 assert(_init_lock_offset != 0, "must be set"); 676 return java_class->obj_field(_init_lock_offset); 677 } 678 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) { 679 assert(_init_lock_offset != 0, "must be set"); 680 java_class->obj_field_put(_init_lock_offset, init_lock); 681 } 682 683 objArrayOop java_lang_Class::signers(oop java_class) { 684 assert(_signers_offset != 0, "must be set"); 685 return (objArrayOop)java_class->obj_field(_signers_offset); 686 } 687 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) { 688 assert(_signers_offset != 0, "must be set"); 689 java_class->obj_field_put(_signers_offset, (oop)signers); 690 } 691 692 693 void java_lang_Class::set_class_loader(oop java_class, oop loader) { 694 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet. 695 if (_class_loader_offset != 0) { 696 java_class->obj_field_put(_class_loader_offset, loader); 697 } 698 } 699 700 oop java_lang_Class::class_loader(oop java_class) { 701 assert(_class_loader_offset != 0, "must be set"); 702 return java_class->obj_field(_class_loader_offset); 703 } 704 705 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) { 706 // This should be improved by adding a field at the Java level or by 707 // introducing a new VM klass (see comment in ClassFileParser) 708 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0); 709 if (type != T_VOID) { 710 Klass* aklass = Universe::typeArrayKlassObj(type); 711 assert(aklass != NULL, "correct bootstrap"); 712 set_array_klass(java_class, aklass); 713 } 714 #ifdef ASSERT 715 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass()); 716 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation"); 717 #endif 718 return java_class; 719 } 720 721 722 Klass* java_lang_Class::as_Klass(oop java_class) { 723 //%note memory_2 724 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 725 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset)); 726 assert(k == NULL || k->is_klass(), "type check"); 727 return k; 728 } 729 730 731 void java_lang_Class::set_klass(oop java_class, Klass* klass) { 732 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 733 java_class->metadata_field_put(_klass_offset, klass); 734 } 735 736 737 void java_lang_Class::print_signature(oop java_class, outputStream* st) { 738 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 739 Symbol* name = NULL; 740 bool is_instance = false; 741 if (is_primitive(java_class)) { 742 name = vmSymbols::type_signature(primitive_type(java_class)); 743 } else { 744 Klass* k = as_Klass(java_class); 745 is_instance = k->oop_is_instance(); 746 name = k->name(); 747 } 748 if (name == NULL) { 749 st->print("<null>"); 750 return; 751 } 752 if (is_instance) st->print("L"); 753 st->write((char*) name->base(), (int) name->utf8_length()); 754 if (is_instance) st->print(";"); 755 } 756 757 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) { 758 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 759 Symbol* name; 760 if (is_primitive(java_class)) { 761 name = vmSymbols::type_signature(primitive_type(java_class)); 762 // Because this can create a new symbol, the caller has to decrement 763 // the refcount, so make adjustment here and below for symbols returned 764 // that are not created or incremented due to a successful lookup. 765 name->increment_refcount(); 766 } else { 767 Klass* k = as_Klass(java_class); 768 if (!k->oop_is_instance()) { 769 name = k->name(); 770 name->increment_refcount(); 771 } else { 772 ResourceMark rm; 773 const char* sigstr = k->signature_name(); 774 int siglen = (int) strlen(sigstr); 775 if (!intern_if_not_found) { 776 name = SymbolTable::probe(sigstr, siglen); 777 } else { 778 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 779 } 780 } 781 } 782 return name; 783 } 784 785 // Returns the Java name for this Java mirror (Resource allocated) 786 // See Klass::external_name(). 787 // For primitive type Java mirrors, its type name is returned. 788 const char* java_lang_Class::as_external_name(oop java_class) { 789 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 790 const char* name = NULL; 791 if (is_primitive(java_class)) { 792 name = type2name(primitive_type(java_class)); 793 } else { 794 name = as_Klass(java_class)->external_name(); 795 } 796 if (name == NULL) { 797 name = "<null>"; 798 } 799 return name; 800 } 801 802 Klass* java_lang_Class::array_klass(oop java_class) { 803 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset)); 804 assert(k == NULL || k->is_klass() && k->oop_is_array(), "should be array klass"); 805 return k; 806 } 807 808 809 void java_lang_Class::set_array_klass(oop java_class, Klass* klass) { 810 assert(klass->is_klass() && klass->oop_is_array(), "should be array klass"); 811 java_class->metadata_field_put(_array_klass_offset, klass); 812 } 813 814 815 bool java_lang_Class::is_primitive(oop java_class) { 816 // should assert: 817 //assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 818 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL); 819 820 #ifdef ASSERT 821 if (is_primitive) { 822 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset)); 823 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()), 824 "Should be either the T_VOID primitive or a java primitive"); 825 } 826 #endif 827 828 return is_primitive; 829 } 830 831 832 BasicType java_lang_Class::primitive_type(oop java_class) { 833 assert(java_lang_Class::is_primitive(java_class), "just checking"); 834 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset)); 835 BasicType type = T_VOID; 836 if (ak != NULL) { 837 // Note: create_basic_type_mirror above initializes ak to a non-null value. 838 type = ArrayKlass::cast(ak)->element_type(); 839 } else { 840 assert(java_class == Universe::void_mirror(), "only valid non-array primitive"); 841 } 842 assert(Universe::java_mirror(type) == java_class, "must be consistent"); 843 return type; 844 } 845 846 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) { 847 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 848 if (is_primitive(java_class)) { 849 if (reference_klass != NULL) 850 (*reference_klass) = NULL; 851 return primitive_type(java_class); 852 } else { 853 if (reference_klass != NULL) 854 (*reference_klass) = as_Klass(java_class); 855 return T_OBJECT; 856 } 857 } 858 859 860 oop java_lang_Class::primitive_mirror(BasicType t) { 861 oop mirror = Universe::java_mirror(t); 862 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class"); 863 assert(java_lang_Class::is_primitive(mirror), "must be primitive"); 864 return mirror; 865 } 866 867 bool java_lang_Class::offsets_computed = false; 868 int java_lang_Class::classRedefinedCount_offset = -1; 869 870 void java_lang_Class::compute_offsets() { 871 assert(!offsets_computed, "offsets should be initialized only once"); 872 offsets_computed = true; 873 874 Klass* klass_oop = SystemDictionary::Class_klass(); 875 // The classRedefinedCount field is only present starting in 1.5, 876 // so don't go fatal. 877 compute_optional_offset(classRedefinedCount_offset, 878 klass_oop, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature()); 879 880 // Needs to be optional because the old build runs Queens during bootstrapping 881 // and jdk8-9 doesn't have coordinated pushes yet. 882 compute_optional_offset(_class_loader_offset, 883 klass_oop, vmSymbols::classLoader_name(), 884 vmSymbols::classloader_signature()); 885 886 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 887 } 888 889 int java_lang_Class::classRedefinedCount(oop the_class_mirror) { 890 if (!JDK_Version::is_gte_jdk15x_version() 891 || classRedefinedCount_offset == -1) { 892 // The classRedefinedCount field is only present starting in 1.5. 893 // If we don't have an offset for it then just return -1 as a marker. 894 return -1; 895 } 896 897 return the_class_mirror->int_field(classRedefinedCount_offset); 898 } 899 900 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) { 901 if (!JDK_Version::is_gte_jdk15x_version() 902 || classRedefinedCount_offset == -1) { 903 // The classRedefinedCount field is only present starting in 1.5. 904 // If we don't have an offset for it then nothing to set. 905 return; 906 } 907 908 the_class_mirror->int_field_put(classRedefinedCount_offset, value); 909 } 910 911 912 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the 913 // platform thread structure, and a eetop offset which was used for thread 914 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures 915 // merged, so in the HotSpot VM we just use the eetop field for the thread 916 // instead of the privateInfo_offset. 917 // 918 // Note: The stackSize field is only present starting in 1.4. 919 920 int java_lang_Thread::_name_offset = 0; 921 int java_lang_Thread::_group_offset = 0; 922 int java_lang_Thread::_contextClassLoader_offset = 0; 923 int java_lang_Thread::_inheritedAccessControlContext_offset = 0; 924 int java_lang_Thread::_priority_offset = 0; 925 int java_lang_Thread::_eetop_offset = 0; 926 int java_lang_Thread::_daemon_offset = 0; 927 int java_lang_Thread::_stillborn_offset = 0; 928 int java_lang_Thread::_stackSize_offset = 0; 929 int java_lang_Thread::_tid_offset = 0; 930 int java_lang_Thread::_thread_status_offset = 0; 931 int java_lang_Thread::_park_blocker_offset = 0; 932 int java_lang_Thread::_park_event_offset = 0 ; 933 934 935 void java_lang_Thread::compute_offsets() { 936 assert(_group_offset == 0, "offsets should be initialized only once"); 937 938 Klass* k = SystemDictionary::Thread_klass(); 939 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 940 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature()); 941 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature()); 942 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature()); 943 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature()); 944 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature()); 945 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature()); 946 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature()); 947 // The stackSize field is only present starting in 1.4, so don't go fatal. 948 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature()); 949 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal. 950 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature()); 951 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature()); 952 // The parkBlocker field is only present starting in 1.6, so don't go fatal. 953 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature()); 954 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(), 955 vmSymbols::long_signature()); 956 } 957 958 959 JavaThread* java_lang_Thread::thread(oop java_thread) { 960 return (JavaThread*)java_thread->address_field(_eetop_offset); 961 } 962 963 964 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) { 965 java_thread->address_field_put(_eetop_offset, (address)thread); 966 } 967 968 969 oop java_lang_Thread::name(oop java_thread) { 970 return java_thread->obj_field(_name_offset); 971 } 972 973 974 void java_lang_Thread::set_name(oop java_thread, oop name) { 975 java_thread->obj_field_put(_name_offset, name); 976 } 977 978 979 ThreadPriority java_lang_Thread::priority(oop java_thread) { 980 return (ThreadPriority)java_thread->int_field(_priority_offset); 981 } 982 983 984 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) { 985 java_thread->int_field_put(_priority_offset, priority); 986 } 987 988 989 oop java_lang_Thread::threadGroup(oop java_thread) { 990 return java_thread->obj_field(_group_offset); 991 } 992 993 994 bool java_lang_Thread::is_stillborn(oop java_thread) { 995 return java_thread->bool_field(_stillborn_offset) != 0; 996 } 997 998 999 // We never have reason to turn the stillborn bit off 1000 void java_lang_Thread::set_stillborn(oop java_thread) { 1001 java_thread->bool_field_put(_stillborn_offset, true); 1002 } 1003 1004 1005 bool java_lang_Thread::is_alive(oop java_thread) { 1006 JavaThread* thr = java_lang_Thread::thread(java_thread); 1007 return (thr != NULL); 1008 } 1009 1010 1011 bool java_lang_Thread::is_daemon(oop java_thread) { 1012 return java_thread->bool_field(_daemon_offset) != 0; 1013 } 1014 1015 1016 void java_lang_Thread::set_daemon(oop java_thread) { 1017 java_thread->bool_field_put(_daemon_offset, true); 1018 } 1019 1020 oop java_lang_Thread::context_class_loader(oop java_thread) { 1021 return java_thread->obj_field(_contextClassLoader_offset); 1022 } 1023 1024 oop java_lang_Thread::inherited_access_control_context(oop java_thread) { 1025 return java_thread->obj_field(_inheritedAccessControlContext_offset); 1026 } 1027 1028 1029 jlong java_lang_Thread::stackSize(oop java_thread) { 1030 // The stackSize field is only present starting in 1.4 1031 if (_stackSize_offset > 0) { 1032 assert(JDK_Version::is_gte_jdk14x_version(), "sanity check"); 1033 return java_thread->long_field(_stackSize_offset); 1034 } else { 1035 return 0; 1036 } 1037 } 1038 1039 // Write the thread status value to threadStatus field in java.lang.Thread java class. 1040 void java_lang_Thread::set_thread_status(oop java_thread, 1041 java_lang_Thread::ThreadStatus status) { 1042 // The threadStatus is only present starting in 1.5 1043 if (_thread_status_offset > 0) { 1044 java_thread->int_field_put(_thread_status_offset, status); 1045 } 1046 } 1047 1048 // Read thread status value from threadStatus field in java.lang.Thread java class. 1049 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) { 1050 assert(Thread::current()->is_Watcher_thread() || Thread::current()->is_VM_thread() || 1051 JavaThread::current()->thread_state() == _thread_in_vm, 1052 "Java Thread is not running in vm"); 1053 // The threadStatus is only present starting in 1.5 1054 if (_thread_status_offset > 0) { 1055 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1056 } else { 1057 // All we can easily figure out is if it is alive, but that is 1058 // enough info for a valid unknown status. 1059 // These aren't restricted to valid set ThreadStatus values, so 1060 // use JVMTI values and cast. 1061 JavaThread* thr = java_lang_Thread::thread(java_thread); 1062 if (thr == NULL) { 1063 // the thread hasn't run yet or is in the process of exiting 1064 return NEW; 1065 } 1066 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE; 1067 } 1068 } 1069 1070 1071 jlong java_lang_Thread::thread_id(oop java_thread) { 1072 // The thread ID field is only present starting in 1.5 1073 if (_tid_offset > 0) { 1074 return java_thread->long_field(_tid_offset); 1075 } else { 1076 return 0; 1077 } 1078 } 1079 1080 oop java_lang_Thread::park_blocker(oop java_thread) { 1081 assert(JDK_Version::current().supports_thread_park_blocker() && 1082 _park_blocker_offset != 0, "Must support parkBlocker field"); 1083 1084 if (_park_blocker_offset > 0) { 1085 return java_thread->obj_field(_park_blocker_offset); 1086 } 1087 1088 return NULL; 1089 } 1090 1091 jlong java_lang_Thread::park_event(oop java_thread) { 1092 if (_park_event_offset > 0) { 1093 return java_thread->long_field(_park_event_offset); 1094 } 1095 return 0; 1096 } 1097 1098 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) { 1099 if (_park_event_offset > 0) { 1100 java_thread->long_field_put(_park_event_offset, ptr); 1101 return true; 1102 } 1103 return false; 1104 } 1105 1106 1107 const char* java_lang_Thread::thread_status_name(oop java_thread) { 1108 assert(JDK_Version::is_gte_jdk15x_version() && _thread_status_offset != 0, "Must have thread status"); 1109 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1110 switch (status) { 1111 case NEW : return "NEW"; 1112 case RUNNABLE : return "RUNNABLE"; 1113 case SLEEPING : return "TIMED_WAITING (sleeping)"; 1114 case IN_OBJECT_WAIT : return "WAITING (on object monitor)"; 1115 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)"; 1116 case PARKED : return "WAITING (parking)"; 1117 case PARKED_TIMED : return "TIMED_WAITING (parking)"; 1118 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)"; 1119 case TERMINATED : return "TERMINATED"; 1120 default : return "UNKNOWN"; 1121 }; 1122 } 1123 int java_lang_ThreadGroup::_parent_offset = 0; 1124 int java_lang_ThreadGroup::_name_offset = 0; 1125 int java_lang_ThreadGroup::_threads_offset = 0; 1126 int java_lang_ThreadGroup::_groups_offset = 0; 1127 int java_lang_ThreadGroup::_maxPriority_offset = 0; 1128 int java_lang_ThreadGroup::_destroyed_offset = 0; 1129 int java_lang_ThreadGroup::_daemon_offset = 0; 1130 int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0; 1131 int java_lang_ThreadGroup::_nthreads_offset = 0; 1132 int java_lang_ThreadGroup::_ngroups_offset = 0; 1133 1134 oop java_lang_ThreadGroup::parent(oop java_thread_group) { 1135 assert(java_thread_group->is_oop(), "thread group must be oop"); 1136 return java_thread_group->obj_field(_parent_offset); 1137 } 1138 1139 // ("name as oop" accessor is not necessary) 1140 1141 typeArrayOop java_lang_ThreadGroup::name(oop java_thread_group) { 1142 oop name = java_thread_group->obj_field(_name_offset); 1143 // ThreadGroup.name can be null 1144 return name == NULL ? (typeArrayOop)NULL : java_lang_String::value(name); 1145 } 1146 1147 int java_lang_ThreadGroup::nthreads(oop java_thread_group) { 1148 assert(java_thread_group->is_oop(), "thread group must be oop"); 1149 return java_thread_group->int_field(_nthreads_offset); 1150 } 1151 1152 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) { 1153 oop threads = java_thread_group->obj_field(_threads_offset); 1154 assert(threads != NULL, "threadgroups should have threads"); 1155 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code 1156 return objArrayOop(threads); 1157 } 1158 1159 int java_lang_ThreadGroup::ngroups(oop java_thread_group) { 1160 assert(java_thread_group->is_oop(), "thread group must be oop"); 1161 return java_thread_group->int_field(_ngroups_offset); 1162 } 1163 1164 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) { 1165 oop groups = java_thread_group->obj_field(_groups_offset); 1166 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code 1167 return objArrayOop(groups); 1168 } 1169 1170 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) { 1171 assert(java_thread_group->is_oop(), "thread group must be oop"); 1172 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset); 1173 } 1174 1175 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) { 1176 assert(java_thread_group->is_oop(), "thread group must be oop"); 1177 return java_thread_group->bool_field(_destroyed_offset) != 0; 1178 } 1179 1180 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) { 1181 assert(java_thread_group->is_oop(), "thread group must be oop"); 1182 return java_thread_group->bool_field(_daemon_offset) != 0; 1183 } 1184 1185 bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) { 1186 assert(java_thread_group->is_oop(), "thread group must be oop"); 1187 return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0; 1188 } 1189 1190 void java_lang_ThreadGroup::compute_offsets() { 1191 assert(_parent_offset == 0, "offsets should be initialized only once"); 1192 1193 Klass* k = SystemDictionary::ThreadGroup_klass(); 1194 1195 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature()); 1196 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1197 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature()); 1198 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature()); 1199 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature()); 1200 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature()); 1201 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature()); 1202 compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature()); 1203 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature()); 1204 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature()); 1205 } 1206 1207 oop java_lang_Throwable::unassigned_stacktrace() { 1208 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Throwable_klass()); 1209 address addr = ik->static_field_addr(static_unassigned_stacktrace_offset); 1210 if (UseCompressedOops) { 1211 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 1212 } else { 1213 return oopDesc::load_decode_heap_oop((oop*)addr); 1214 } 1215 } 1216 1217 oop java_lang_Throwable::backtrace(oop throwable) { 1218 return throwable->obj_field_acquire(backtrace_offset); 1219 } 1220 1221 1222 void java_lang_Throwable::set_backtrace(oop throwable, oop value) { 1223 throwable->release_obj_field_put(backtrace_offset, value); 1224 } 1225 1226 1227 oop java_lang_Throwable::message(oop throwable) { 1228 return throwable->obj_field(detailMessage_offset); 1229 } 1230 1231 1232 oop java_lang_Throwable::message(Handle throwable) { 1233 return throwable->obj_field(detailMessage_offset); 1234 } 1235 1236 1237 void java_lang_Throwable::set_message(oop throwable, oop value) { 1238 throwable->obj_field_put(detailMessage_offset, value); 1239 } 1240 1241 1242 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) { 1243 throwable->obj_field_put(stackTrace_offset, st_element_array); 1244 } 1245 1246 void java_lang_Throwable::clear_stacktrace(oop throwable) { 1247 assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4"); 1248 set_stacktrace(throwable, NULL); 1249 } 1250 1251 1252 void java_lang_Throwable::print(oop throwable, outputStream* st) { 1253 ResourceMark rm; 1254 Klass* k = throwable->klass(); 1255 assert(k != NULL, "just checking"); 1256 st->print("%s", InstanceKlass::cast(k)->external_name()); 1257 oop msg = message(throwable); 1258 if (msg != NULL) { 1259 st->print(": %s", java_lang_String::as_utf8_string(msg)); 1260 } 1261 } 1262 1263 1264 void java_lang_Throwable::print(Handle throwable, outputStream* st) { 1265 ResourceMark rm; 1266 Klass* k = throwable->klass(); 1267 assert(k != NULL, "just checking"); 1268 st->print("%s", InstanceKlass::cast(k)->external_name()); 1269 oop msg = message(throwable); 1270 if (msg != NULL) { 1271 st->print(": %s", java_lang_String::as_utf8_string(msg)); 1272 } 1273 } 1274 1275 // After this many redefines, the stack trace is unreliable. 1276 const int MAX_VERSION = USHRT_MAX; 1277 1278 // Helper backtrace functions to store bci|version together. 1279 static inline int merge_bci_and_version(int bci, int version) { 1280 // only store u2 for version, checking for overflow. 1281 if (version > USHRT_MAX || version < 0) version = MAX_VERSION; 1282 assert((jushort)bci == bci, "bci should be short"); 1283 return build_int_from_shorts(version, bci); 1284 } 1285 1286 static inline int bci_at(unsigned int merged) { 1287 return extract_high_short_from_int(merged); 1288 } 1289 static inline int version_at(unsigned int merged) { 1290 return extract_low_short_from_int(merged); 1291 } 1292 1293 static inline bool version_matches(Method* method, int version) { 1294 assert(version < MAX_VERSION, "version is too big"); 1295 return method != NULL && (method->constants()->version() == version); 1296 } 1297 1298 static inline int get_line_number(Method* method, int bci) { 1299 int line_number = 0; 1300 if (method->is_native()) { 1301 // Negative value different from -1 below, enabling Java code in 1302 // class java.lang.StackTraceElement to distinguish "native" from 1303 // "no LineNumberTable". JDK tests for -2. 1304 line_number = -2; 1305 } else { 1306 // Returns -1 if no LineNumberTable, and otherwise actual line number 1307 line_number = method->line_number_from_bci(bci); 1308 if (line_number == -1 && ShowHiddenFrames) { 1309 line_number = bci + 1000000; 1310 } 1311 } 1312 return line_number; 1313 } 1314 1315 // This class provides a simple wrapper over the internal structure of 1316 // exception backtrace to insulate users of the backtrace from needing 1317 // to know what it looks like. 1318 class BacktraceBuilder: public StackObj { 1319 private: 1320 Handle _backtrace; 1321 objArrayOop _head; 1322 typeArrayOop _methods; 1323 typeArrayOop _bcis; 1324 objArrayOop _mirrors; 1325 typeArrayOop _cprefs; // needed to insulate method name against redefinition 1326 int _index; 1327 No_Safepoint_Verifier _nsv; 1328 1329 public: 1330 1331 enum { 1332 trace_methods_offset = java_lang_Throwable::trace_methods_offset, 1333 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset, 1334 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset, 1335 trace_cprefs_offset = java_lang_Throwable::trace_cprefs_offset, 1336 trace_next_offset = java_lang_Throwable::trace_next_offset, 1337 trace_size = java_lang_Throwable::trace_size, 1338 trace_chunk_size = java_lang_Throwable::trace_chunk_size 1339 }; 1340 1341 // get info out of chunks 1342 static typeArrayOop get_methods(objArrayHandle chunk) { 1343 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset)); 1344 assert(methods != NULL, "method array should be initialized in backtrace"); 1345 return methods; 1346 } 1347 static typeArrayOop get_bcis(objArrayHandle chunk) { 1348 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 1349 assert(bcis != NULL, "bci array should be initialized in backtrace"); 1350 return bcis; 1351 } 1352 static objArrayOop get_mirrors(objArrayHandle chunk) { 1353 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset)); 1354 assert(mirrors != NULL, "mirror array should be initialized in backtrace"); 1355 return mirrors; 1356 } 1357 static typeArrayOop get_cprefs(objArrayHandle chunk) { 1358 typeArrayOop cprefs = typeArrayOop(chunk->obj_at(trace_cprefs_offset)); 1359 assert(cprefs != NULL, "cprefs array should be initialized in backtrace"); 1360 return cprefs; 1361 } 1362 1363 // constructor for new backtrace 1364 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL), _cprefs(NULL) { 1365 expand(CHECK); 1366 _backtrace = _head; 1367 _index = 0; 1368 } 1369 1370 BacktraceBuilder(objArrayHandle backtrace) { 1371 _methods = get_methods(backtrace); 1372 _bcis = get_bcis(backtrace); 1373 _mirrors = get_mirrors(backtrace); 1374 _cprefs = get_cprefs(backtrace); 1375 assert(_methods->length() == _bcis->length() && 1376 _methods->length() == _mirrors->length(), 1377 "method and source information arrays should match"); 1378 1379 // head is the preallocated backtrace 1380 _backtrace = _head = backtrace(); 1381 _index = 0; 1382 } 1383 1384 void expand(TRAPS) { 1385 objArrayHandle old_head(THREAD, _head); 1386 Pause_No_Safepoint_Verifier pnsv(&_nsv); 1387 1388 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK); 1389 objArrayHandle new_head(THREAD, head); 1390 1391 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK); 1392 typeArrayHandle new_methods(THREAD, methods); 1393 1394 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK); 1395 typeArrayHandle new_bcis(THREAD, bcis); 1396 1397 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK); 1398 objArrayHandle new_mirrors(THREAD, mirrors); 1399 1400 typeArrayOop cprefs = oopFactory::new_shortArray(trace_chunk_size, CHECK); 1401 typeArrayHandle new_cprefs(THREAD, cprefs); 1402 1403 if (!old_head.is_null()) { 1404 old_head->obj_at_put(trace_next_offset, new_head()); 1405 } 1406 new_head->obj_at_put(trace_methods_offset, new_methods()); 1407 new_head->obj_at_put(trace_bcis_offset, new_bcis()); 1408 new_head->obj_at_put(trace_mirrors_offset, new_mirrors()); 1409 new_head->obj_at_put(trace_cprefs_offset, new_cprefs()); 1410 1411 _head = new_head(); 1412 _methods = new_methods(); 1413 _bcis = new_bcis(); 1414 _mirrors = new_mirrors(); 1415 _cprefs = new_cprefs(); 1416 _index = 0; 1417 } 1418 1419 oop backtrace() { 1420 return _backtrace(); 1421 } 1422 1423 inline void push(Method* method, int bci, TRAPS) { 1424 // Smear the -1 bci to 0 since the array only holds unsigned 1425 // shorts. The later line number lookup would just smear the -1 1426 // to a 0 even if it could be recorded. 1427 if (bci == SynchronizationEntryBCI) bci = 0; 1428 1429 if (_index >= trace_chunk_size) { 1430 methodHandle mhandle(THREAD, method); 1431 expand(CHECK); 1432 method = mhandle(); 1433 } 1434 1435 _methods->short_at_put(_index, method->orig_method_idnum()); 1436 _bcis->int_at_put(_index, merge_bci_and_version(bci, method->constants()->version())); 1437 _cprefs->short_at_put(_index, method->name_index()); 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, int cpref) { 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 Method* method = holder->method_with_orig_idnum(method_id, version); 1458 1459 // The method can be NULL if the requested class version is gone 1460 Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref); 1461 char* method_name = sym->as_C_string(); 1462 buf_len += (int)strlen(method_name); 1463 1464 // Use a specific ik version as a holder since the mirror might 1465 // refer to a version that is now obsolete and no longer accessible 1466 // via the previous versions list. 1467 holder = holder->get_klass_version(version); 1468 char* source_file_name = NULL; 1469 if (holder != NULL) { 1470 Symbol* source = holder->source_file_name(); 1471 if (source != NULL) { 1472 source_file_name = source->as_C_string(); 1473 buf_len += (int)strlen(source_file_name); 1474 } 1475 } 1476 1477 // Allocate temporary buffer with extra space for formatting and line number 1478 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64); 1479 1480 // Print stack trace line in buffer 1481 sprintf(buf, "\tat %s.%s", klass_name, method_name); 1482 1483 if (!version_matches(method, version)) { 1484 strcat(buf, "(Redefined)"); 1485 } else { 1486 int line_number = get_line_number(method, bci); 1487 if (line_number == -2) { 1488 strcat(buf, "(Native Method)"); 1489 } else { 1490 if (source_file_name != NULL && (line_number != -1)) { 1491 // Sourcename and linenumber 1492 sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number); 1493 } else if (source_file_name != NULL) { 1494 // Just sourcename 1495 sprintf(buf + (int)strlen(buf), "(%s)", source_file_name); 1496 } else { 1497 // Neither sourcename nor linenumber 1498 sprintf(buf + (int)strlen(buf), "(Unknown Source)"); 1499 } 1500 nmethod* nm = method->code(); 1501 if (WizardMode && nm != NULL) { 1502 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm); 1503 } 1504 } 1505 } 1506 1507 return buf; 1508 } 1509 1510 void java_lang_Throwable::print_stack_element(outputStream *st, Handle mirror, 1511 int method_id, int version, int bci, int cpref) { 1512 ResourceMark rm; 1513 char* buf = print_stack_element_to_buffer(mirror, method_id, version, bci, cpref); 1514 st->print_cr("%s", buf); 1515 } 1516 1517 void java_lang_Throwable::print_stack_element(outputStream *st, methodHandle method, int bci) { 1518 Handle mirror = method->method_holder()->java_mirror(); 1519 int method_id = method->orig_method_idnum(); 1520 int version = method->constants()->version(); 1521 int cpref = method->name_index(); 1522 print_stack_element(st, mirror, method_id, version, bci, cpref); 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 typeArrayHandle cprefs (THREAD, BacktraceBuilder::get_cprefs(result)); 1548 1549 int length = methods()->length(); 1550 for (int index = 0; index < length; index++) { 1551 Handle mirror(THREAD, mirrors->obj_at(index)); 1552 // NULL mirror means end of stack trace 1553 if (mirror.is_null()) goto handle_cause; 1554 int method = methods->short_at(index); 1555 int version = version_at(bcis->int_at(index)); 1556 int bci = bci_at(bcis->int_at(index)); 1557 int cpref = cprefs->short_at(index); 1558 print_stack_element(st, mirror, method, version, bci, cpref); 1559 } 1560 result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset))); 1561 } 1562 handle_cause: 1563 { 1564 EXCEPTION_MARK; 1565 JavaValue cause(T_OBJECT); 1566 JavaCalls::call_virtual(&cause, 1567 h_throwable, 1568 KlassHandle(THREAD, h_throwable->klass()), 1569 vmSymbols::getCause_name(), 1570 vmSymbols::void_throwable_signature(), 1571 THREAD); 1572 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 1573 if (HAS_PENDING_EXCEPTION) { 1574 CLEAR_PENDING_EXCEPTION; 1575 h_throwable = Handle(); 1576 } else { 1577 h_throwable = Handle(THREAD, (oop) cause.get_jobject()); 1578 if (h_throwable.not_null()) { 1579 st->print("Caused by: "); 1580 print(h_throwable, st); 1581 st->cr(); 1582 } 1583 } 1584 } 1585 } 1586 } 1587 1588 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS) { 1589 if (!StackTraceInThrowable) return; 1590 ResourceMark rm(THREAD); 1591 1592 // Start out by clearing the backtrace for this object, in case the VM 1593 // runs out of memory while allocating the stack trace 1594 set_backtrace(throwable(), NULL); 1595 if (JDK_Version::is_gte_jdk14x_version()) { 1596 // New since 1.4, clear lazily constructed Java level stacktrace if 1597 // refilling occurs 1598 // This is unnecessary in 1.7+ but harmless 1599 clear_stacktrace(throwable()); 1600 } 1601 1602 int max_depth = MaxJavaStackTraceDepth; 1603 JavaThread* thread = (JavaThread*)THREAD; 1604 BacktraceBuilder bt(CHECK); 1605 1606 // If there is no Java frame just return the method that was being called 1607 // with bci 0 1608 if (!thread->has_last_Java_frame()) { 1609 if (max_depth >= 1 && method() != NULL) { 1610 bt.push(method(), 0, CHECK); 1611 set_backtrace(throwable(), bt.backtrace()); 1612 } 1613 return; 1614 } 1615 1616 // Instead of using vframe directly, this version of fill_in_stack_trace 1617 // basically handles everything by hand. This significantly improved the 1618 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows. 1619 // See bug 6333838 for more details. 1620 // The "ASSERT" here is to verify this method generates the exactly same stack 1621 // trace as utilizing vframe. 1622 #ifdef ASSERT 1623 vframeStream st(thread); 1624 methodHandle st_method(THREAD, st.method()); 1625 #endif 1626 int total_count = 0; 1627 RegisterMap map(thread, false); 1628 int decode_offset = 0; 1629 nmethod* nm = NULL; 1630 bool skip_fillInStackTrace_check = false; 1631 bool skip_throwableInit_check = false; 1632 bool skip_hidden = !ShowHiddenFrames; 1633 1634 for (frame fr = thread->last_frame(); max_depth != total_count;) { 1635 Method* method = NULL; 1636 int bci = 0; 1637 1638 // Compiled java method case. 1639 if (decode_offset != 0) { 1640 DebugInfoReadStream stream(nm, decode_offset); 1641 decode_offset = stream.read_int(); 1642 method = (Method*)nm->metadata_at(stream.read_int()); 1643 bci = stream.read_bci(); 1644 } else { 1645 if (fr.is_first_frame()) break; 1646 address pc = fr.pc(); 1647 if (fr.is_interpreted_frame()) { 1648 intptr_t bcx = fr.interpreter_frame_bcx(); 1649 method = fr.interpreter_frame_method(); 1650 bci = fr.is_bci(bcx) ? bcx : method->bci_from((address)bcx); 1651 fr = fr.sender(&map); 1652 } else { 1653 CodeBlob* cb = fr.cb(); 1654 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL 1655 // but non nmethod 1656 fr = fr.sender(&map); 1657 if (cb == NULL || !cb->is_nmethod()) { 1658 continue; 1659 } 1660 nm = (nmethod*)cb; 1661 if (nm->method()->is_native()) { 1662 method = nm->method(); 1663 bci = 0; 1664 } else { 1665 PcDesc* pd = nm->pc_desc_at(pc); 1666 decode_offset = pd->scope_decode_offset(); 1667 // if decode_offset is not equal to 0, it will execute the 1668 // "compiled java method case" at the beginning of the loop. 1669 continue; 1670 } 1671 } 1672 } 1673 #ifdef ASSERT 1674 assert(st_method() == method && st.bci() == bci, 1675 "Wrong stack trace"); 1676 st.next(); 1677 // vframeStream::method isn't GC-safe so store off a copy 1678 // of the Method* in case we GC. 1679 if (!st.at_end()) { 1680 st_method = st.method(); 1681 } 1682 #endif 1683 1684 // the format of the stacktrace will be: 1685 // - 1 or more fillInStackTrace frames for the exception class (skipped) 1686 // - 0 or more <init> methods for the exception class (skipped) 1687 // - rest of the stack 1688 1689 if (!skip_fillInStackTrace_check) { 1690 if ((method->name() == vmSymbols::fillInStackTrace_name() || 1691 method->name() == vmSymbols::fillInStackTrace0_name()) && 1692 throwable->is_a(method->method_holder())) { 1693 continue; 1694 } 1695 else { 1696 skip_fillInStackTrace_check = true; // gone past them all 1697 } 1698 } 1699 if (!skip_throwableInit_check) { 1700 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering"); 1701 1702 // skip <init> methods of the exception class and superclasses 1703 // This is simlar to classic VM. 1704 if (method->name() == vmSymbols::object_initializer_name() && 1705 throwable->is_a(method->method_holder())) { 1706 continue; 1707 } else { 1708 // there are none or we've seen them all - either way stop checking 1709 skip_throwableInit_check = true; 1710 } 1711 } 1712 if (method->is_hidden()) { 1713 if (skip_hidden) continue; 1714 } 1715 bt.push(method, bci, CHECK); 1716 total_count++; 1717 } 1718 1719 // Put completed stack trace into throwable object 1720 set_backtrace(throwable(), bt.backtrace()); 1721 } 1722 1723 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method) { 1724 // No-op if stack trace is disabled 1725 if (!StackTraceInThrowable) { 1726 return; 1727 } 1728 1729 // Disable stack traces for some preallocated out of memory errors 1730 if (!Universe::should_fill_in_stack_trace(throwable)) { 1731 return; 1732 } 1733 1734 PRESERVE_EXCEPTION_MARK; 1735 1736 JavaThread* thread = JavaThread::active(); 1737 fill_in_stack_trace(throwable, method, thread); 1738 // ignore exceptions thrown during stack trace filling 1739 CLEAR_PENDING_EXCEPTION; 1740 } 1741 1742 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 1743 // Allocate stack trace - backtrace is created but not filled in 1744 1745 // No-op if stack trace is disabled 1746 if (!StackTraceInThrowable) return; 1747 BacktraceBuilder bt(CHECK); // creates a backtrace 1748 set_backtrace(throwable(), bt.backtrace()); 1749 } 1750 1751 1752 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 1753 // Fill in stack trace into preallocated backtrace (no GC) 1754 1755 // No-op if stack trace is disabled 1756 if (!StackTraceInThrowable) return; 1757 1758 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check"); 1759 1760 JavaThread* THREAD = JavaThread::current(); 1761 1762 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable())); 1763 assert(backtrace.not_null(), "backtrace should have been preallocated"); 1764 1765 ResourceMark rm(THREAD); 1766 vframeStream st(THREAD); 1767 1768 BacktraceBuilder bt(backtrace); 1769 1770 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 1771 // methods as preallocated errors aren't created by "java" code. 1772 1773 // fill in as much stack trace as possible 1774 typeArrayOop methods = BacktraceBuilder::get_methods(backtrace); 1775 int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth); 1776 int chunk_count = 0; 1777 1778 for (;!st.at_end(); st.next()) { 1779 bt.push(st.method(), st.bci(), CHECK); 1780 chunk_count++; 1781 1782 // Bail-out for deep stacks 1783 if (chunk_count >= max_chunks) break; 1784 } 1785 1786 // For Java 7+ we support the Throwable immutability protocol defined for Java 7. This support 1787 // was missing in 7u0 so in 7u0 there is a workaround in the Throwable class. That workaround 1788 // can be removed in a JDK using this JVM version 1789 if (JDK_Version::is_gte_jdk17x_version()) { 1790 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace()); 1791 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized"); 1792 } 1793 } 1794 1795 1796 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) { 1797 if (throwable == NULL) { 1798 THROW_0(vmSymbols::java_lang_NullPointerException()); 1799 } 1800 objArrayOop chunk = objArrayOop(backtrace(throwable)); 1801 int depth = 0; 1802 if (chunk != NULL) { 1803 // Iterate over chunks and count full ones 1804 while (true) { 1805 objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset)); 1806 if (next == NULL) break; 1807 depth += trace_chunk_size; 1808 chunk = next; 1809 } 1810 assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check"); 1811 // Count element in remaining partial chunk. NULL value for mirror 1812 // marks the end of the stack trace elements that are saved. 1813 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk); 1814 assert(mirrors != NULL, "sanity check"); 1815 for (int i = 0; i < mirrors->length(); i++) { 1816 if (mirrors->obj_at(i) == NULL) break; 1817 depth++; 1818 } 1819 } 1820 return depth; 1821 } 1822 1823 1824 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) { 1825 if (throwable == NULL) { 1826 THROW_0(vmSymbols::java_lang_NullPointerException()); 1827 } 1828 if (index < 0) { 1829 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 1830 } 1831 // Compute how many chunks to skip and index into actual chunk 1832 objArrayOop chunk = objArrayOop(backtrace(throwable)); 1833 int skip_chunks = index / trace_chunk_size; 1834 int chunk_index = index % trace_chunk_size; 1835 while (chunk != NULL && skip_chunks > 0) { 1836 chunk = objArrayOop(chunk->obj_at(trace_next_offset)); 1837 skip_chunks--; 1838 } 1839 if (chunk == NULL) { 1840 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 1841 } 1842 // Get method id, bci, version, mirror and cpref from chunk 1843 typeArrayOop methods = BacktraceBuilder::get_methods(chunk); 1844 typeArrayOop bcis = BacktraceBuilder::get_bcis(chunk); 1845 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk); 1846 typeArrayOop cprefs = BacktraceBuilder::get_cprefs(chunk); 1847 1848 assert(methods != NULL && bcis != NULL && mirrors != NULL, "sanity check"); 1849 1850 int method = methods->short_at(chunk_index); 1851 int version = version_at(bcis->int_at(chunk_index)); 1852 int bci = bci_at(bcis->int_at(chunk_index)); 1853 int cpref = cprefs->short_at(chunk_index); 1854 Handle mirror(THREAD, mirrors->obj_at(chunk_index)); 1855 1856 // Chunk can be partial full 1857 if (mirror.is_null()) { 1858 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 1859 } 1860 oop element = java_lang_StackTraceElement::create(mirror, method, version, bci, cpref, CHECK_0); 1861 return element; 1862 } 1863 1864 oop java_lang_StackTraceElement::create(Handle mirror, int method_id, 1865 int version, int bci, int cpref, TRAPS) { 1866 // Allocate java.lang.StackTraceElement instance 1867 Klass* k = SystemDictionary::StackTraceElement_klass(); 1868 assert(k != NULL, "must be loaded in 1.4+"); 1869 instanceKlassHandle ik (THREAD, k); 1870 if (ik->should_be_initialized()) { 1871 ik->initialize(CHECK_0); 1872 } 1873 1874 Handle element = ik->allocate_instance_handle(CHECK_0); 1875 // Fill in class name 1876 ResourceMark rm(THREAD); 1877 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 1878 const char* str = holder->external_name(); 1879 oop classname = StringTable::intern((char*) str, CHECK_0); 1880 java_lang_StackTraceElement::set_declaringClass(element(), classname); 1881 1882 Method* method = holder->method_with_orig_idnum(method_id, version); 1883 1884 // The method can be NULL if the requested class version is gone 1885 Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref); 1886 1887 // Fill in method name 1888 oop methodname = StringTable::intern(sym, CHECK_0); 1889 java_lang_StackTraceElement::set_methodName(element(), methodname); 1890 1891 if (!version_matches(method, version)) { 1892 // The method was redefined, accurate line number information isn't available 1893 java_lang_StackTraceElement::set_fileName(element(), NULL); 1894 java_lang_StackTraceElement::set_lineNumber(element(), -1); 1895 } else { 1896 // Fill in source file name and line number. 1897 // Use a specific ik version as a holder since the mirror might 1898 // refer to a version that is now obsolete and no longer accessible 1899 // via the previous versions list. 1900 holder = holder->get_klass_version(version); 1901 assert(holder != NULL, "sanity check"); 1902 Symbol* source = holder->source_file_name(); 1903 if (ShowHiddenFrames && source == NULL) 1904 source = vmSymbols::unknown_class_name(); 1905 oop filename = StringTable::intern(source, CHECK_0); 1906 java_lang_StackTraceElement::set_fileName(element(), filename); 1907 1908 int line_number = get_line_number(method, bci); 1909 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 1910 } 1911 return element(); 1912 } 1913 1914 oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) { 1915 Handle mirror (THREAD, method->method_holder()->java_mirror()); 1916 int method_id = method->orig_method_idnum(); 1917 int cpref = method->name_index(); 1918 return create(mirror, method_id, method->constants()->version(), bci, cpref, THREAD); 1919 } 1920 1921 void java_lang_reflect_AccessibleObject::compute_offsets() { 1922 Klass* k = SystemDictionary::reflect_AccessibleObject_klass(); 1923 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature()); 1924 } 1925 1926 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 1927 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1928 return (jboolean) reflect->bool_field(override_offset); 1929 } 1930 1931 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 1932 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1933 reflect->bool_field_put(override_offset, (int) value); 1934 } 1935 1936 void java_lang_reflect_Method::compute_offsets() { 1937 Klass* k = SystemDictionary::reflect_Method_klass(); 1938 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 1939 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1940 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature()); 1941 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 1942 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 1943 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 1944 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 1945 // The generic signature and annotations fields are only present in 1.5 1946 signature_offset = -1; 1947 annotations_offset = -1; 1948 parameter_annotations_offset = -1; 1949 annotation_default_offset = -1; 1950 type_annotations_offset = -1; 1951 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 1952 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 1953 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 1954 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature()); 1955 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 1956 } 1957 1958 Handle java_lang_reflect_Method::create(TRAPS) { 1959 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1960 Klass* klass = SystemDictionary::reflect_Method_klass(); 1961 // This class is eagerly initialized during VM initialization, since we keep a refence 1962 // to one of the methods 1963 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized"); 1964 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD); 1965 } 1966 1967 oop java_lang_reflect_Method::clazz(oop reflect) { 1968 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1969 return reflect->obj_field(clazz_offset); 1970 } 1971 1972 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 1973 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1974 reflect->obj_field_put(clazz_offset, value); 1975 } 1976 1977 int java_lang_reflect_Method::slot(oop reflect) { 1978 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1979 return reflect->int_field(slot_offset); 1980 } 1981 1982 void java_lang_reflect_Method::set_slot(oop reflect, int value) { 1983 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1984 reflect->int_field_put(slot_offset, value); 1985 } 1986 1987 oop java_lang_reflect_Method::name(oop method) { 1988 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1989 return method->obj_field(name_offset); 1990 } 1991 1992 void java_lang_reflect_Method::set_name(oop method, oop value) { 1993 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1994 method->obj_field_put(name_offset, value); 1995 } 1996 1997 oop java_lang_reflect_Method::return_type(oop method) { 1998 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1999 return method->obj_field(returnType_offset); 2000 } 2001 2002 void java_lang_reflect_Method::set_return_type(oop method, oop value) { 2003 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2004 method->obj_field_put(returnType_offset, value); 2005 } 2006 2007 oop java_lang_reflect_Method::parameter_types(oop method) { 2008 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2009 return method->obj_field(parameterTypes_offset); 2010 } 2011 2012 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 2013 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2014 method->obj_field_put(parameterTypes_offset, value); 2015 } 2016 2017 oop java_lang_reflect_Method::exception_types(oop method) { 2018 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2019 return method->obj_field(exceptionTypes_offset); 2020 } 2021 2022 void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 2023 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2024 method->obj_field_put(exceptionTypes_offset, value); 2025 } 2026 2027 int java_lang_reflect_Method::modifiers(oop method) { 2028 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2029 return method->int_field(modifiers_offset); 2030 } 2031 2032 void java_lang_reflect_Method::set_modifiers(oop method, int value) { 2033 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2034 method->int_field_put(modifiers_offset, value); 2035 } 2036 2037 bool java_lang_reflect_Method::has_signature_field() { 2038 return (signature_offset >= 0); 2039 } 2040 2041 oop java_lang_reflect_Method::signature(oop method) { 2042 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2043 assert(has_signature_field(), "signature field must be present"); 2044 return method->obj_field(signature_offset); 2045 } 2046 2047 void java_lang_reflect_Method::set_signature(oop method, oop value) { 2048 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2049 assert(has_signature_field(), "signature field must be present"); 2050 method->obj_field_put(signature_offset, value); 2051 } 2052 2053 bool java_lang_reflect_Method::has_annotations_field() { 2054 return (annotations_offset >= 0); 2055 } 2056 2057 oop java_lang_reflect_Method::annotations(oop method) { 2058 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2059 assert(has_annotations_field(), "annotations field must be present"); 2060 return method->obj_field(annotations_offset); 2061 } 2062 2063 void java_lang_reflect_Method::set_annotations(oop method, oop value) { 2064 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2065 assert(has_annotations_field(), "annotations field must be present"); 2066 method->obj_field_put(annotations_offset, value); 2067 } 2068 2069 bool java_lang_reflect_Method::has_parameter_annotations_field() { 2070 return (parameter_annotations_offset >= 0); 2071 } 2072 2073 oop java_lang_reflect_Method::parameter_annotations(oop method) { 2074 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2075 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2076 return method->obj_field(parameter_annotations_offset); 2077 } 2078 2079 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 2080 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2081 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2082 method->obj_field_put(parameter_annotations_offset, value); 2083 } 2084 2085 bool java_lang_reflect_Method::has_annotation_default_field() { 2086 return (annotation_default_offset >= 0); 2087 } 2088 2089 oop java_lang_reflect_Method::annotation_default(oop method) { 2090 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2091 assert(has_annotation_default_field(), "annotation default field must be present"); 2092 return method->obj_field(annotation_default_offset); 2093 } 2094 2095 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 2096 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2097 assert(has_annotation_default_field(), "annotation default field must be present"); 2098 method->obj_field_put(annotation_default_offset, value); 2099 } 2100 2101 bool java_lang_reflect_Method::has_type_annotations_field() { 2102 return (type_annotations_offset >= 0); 2103 } 2104 2105 oop java_lang_reflect_Method::type_annotations(oop method) { 2106 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2107 assert(has_type_annotations_field(), "type_annotations field must be present"); 2108 return method->obj_field(type_annotations_offset); 2109 } 2110 2111 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) { 2112 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2113 assert(has_type_annotations_field(), "type_annotations field must be present"); 2114 method->obj_field_put(type_annotations_offset, value); 2115 } 2116 2117 void java_lang_reflect_Constructor::compute_offsets() { 2118 Klass* k = SystemDictionary::reflect_Constructor_klass(); 2119 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2120 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 2121 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 2122 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 2123 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2124 // The generic signature and annotations fields are only present in 1.5 2125 signature_offset = -1; 2126 annotations_offset = -1; 2127 parameter_annotations_offset = -1; 2128 type_annotations_offset = -1; 2129 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 2130 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 2131 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 2132 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 2133 } 2134 2135 Handle java_lang_reflect_Constructor::create(TRAPS) { 2136 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2137 Symbol* name = vmSymbols::java_lang_reflect_Constructor(); 2138 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2139 instanceKlassHandle klass (THREAD, k); 2140 // Ensure it is initialized 2141 klass->initialize(CHECK_NH); 2142 return klass->allocate_instance_handle(CHECK_NH); 2143 } 2144 2145 oop java_lang_reflect_Constructor::clazz(oop reflect) { 2146 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2147 return reflect->obj_field(clazz_offset); 2148 } 2149 2150 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 2151 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2152 reflect->obj_field_put(clazz_offset, value); 2153 } 2154 2155 oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 2156 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2157 return constructor->obj_field(parameterTypes_offset); 2158 } 2159 2160 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 2161 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2162 constructor->obj_field_put(parameterTypes_offset, value); 2163 } 2164 2165 oop java_lang_reflect_Constructor::exception_types(oop constructor) { 2166 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2167 return constructor->obj_field(exceptionTypes_offset); 2168 } 2169 2170 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 2171 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2172 constructor->obj_field_put(exceptionTypes_offset, value); 2173 } 2174 2175 int java_lang_reflect_Constructor::slot(oop reflect) { 2176 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2177 return reflect->int_field(slot_offset); 2178 } 2179 2180 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 2181 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2182 reflect->int_field_put(slot_offset, value); 2183 } 2184 2185 int java_lang_reflect_Constructor::modifiers(oop constructor) { 2186 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2187 return constructor->int_field(modifiers_offset); 2188 } 2189 2190 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 2191 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2192 constructor->int_field_put(modifiers_offset, value); 2193 } 2194 2195 bool java_lang_reflect_Constructor::has_signature_field() { 2196 return (signature_offset >= 0); 2197 } 2198 2199 oop java_lang_reflect_Constructor::signature(oop constructor) { 2200 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2201 assert(has_signature_field(), "signature field must be present"); 2202 return constructor->obj_field(signature_offset); 2203 } 2204 2205 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 2206 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2207 assert(has_signature_field(), "signature field must be present"); 2208 constructor->obj_field_put(signature_offset, value); 2209 } 2210 2211 bool java_lang_reflect_Constructor::has_annotations_field() { 2212 return (annotations_offset >= 0); 2213 } 2214 2215 oop java_lang_reflect_Constructor::annotations(oop constructor) { 2216 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2217 assert(has_annotations_field(), "annotations field must be present"); 2218 return constructor->obj_field(annotations_offset); 2219 } 2220 2221 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 2222 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2223 assert(has_annotations_field(), "annotations field must be present"); 2224 constructor->obj_field_put(annotations_offset, value); 2225 } 2226 2227 bool java_lang_reflect_Constructor::has_parameter_annotations_field() { 2228 return (parameter_annotations_offset >= 0); 2229 } 2230 2231 oop java_lang_reflect_Constructor::parameter_annotations(oop method) { 2232 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2233 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2234 return method->obj_field(parameter_annotations_offset); 2235 } 2236 2237 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 2238 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2239 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2240 method->obj_field_put(parameter_annotations_offset, value); 2241 } 2242 2243 bool java_lang_reflect_Constructor::has_type_annotations_field() { 2244 return (type_annotations_offset >= 0); 2245 } 2246 2247 oop java_lang_reflect_Constructor::type_annotations(oop constructor) { 2248 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2249 assert(has_type_annotations_field(), "type_annotations field must be present"); 2250 return constructor->obj_field(type_annotations_offset); 2251 } 2252 2253 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) { 2254 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2255 assert(has_type_annotations_field(), "type_annotations field must be present"); 2256 constructor->obj_field_put(type_annotations_offset, value); 2257 } 2258 2259 void java_lang_reflect_Field::compute_offsets() { 2260 Klass* k = SystemDictionary::reflect_Field_klass(); 2261 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2262 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2263 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature()); 2264 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 2265 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2266 // The generic signature and annotations fields are only present in 1.5 2267 signature_offset = -1; 2268 annotations_offset = -1; 2269 type_annotations_offset = -1; 2270 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 2271 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 2272 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 2273 } 2274 2275 Handle java_lang_reflect_Field::create(TRAPS) { 2276 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2277 Symbol* name = vmSymbols::java_lang_reflect_Field(); 2278 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2279 instanceKlassHandle klass (THREAD, k); 2280 // Ensure it is initialized 2281 klass->initialize(CHECK_NH); 2282 return klass->allocate_instance_handle(CHECK_NH); 2283 } 2284 2285 oop java_lang_reflect_Field::clazz(oop reflect) { 2286 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2287 return reflect->obj_field(clazz_offset); 2288 } 2289 2290 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 2291 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2292 reflect->obj_field_put(clazz_offset, value); 2293 } 2294 2295 oop java_lang_reflect_Field::name(oop field) { 2296 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2297 return field->obj_field(name_offset); 2298 } 2299 2300 void java_lang_reflect_Field::set_name(oop field, oop value) { 2301 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2302 field->obj_field_put(name_offset, value); 2303 } 2304 2305 oop java_lang_reflect_Field::type(oop field) { 2306 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2307 return field->obj_field(type_offset); 2308 } 2309 2310 void java_lang_reflect_Field::set_type(oop field, oop value) { 2311 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2312 field->obj_field_put(type_offset, value); 2313 } 2314 2315 int java_lang_reflect_Field::slot(oop reflect) { 2316 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2317 return reflect->int_field(slot_offset); 2318 } 2319 2320 void java_lang_reflect_Field::set_slot(oop reflect, int value) { 2321 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2322 reflect->int_field_put(slot_offset, value); 2323 } 2324 2325 int java_lang_reflect_Field::modifiers(oop field) { 2326 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2327 return field->int_field(modifiers_offset); 2328 } 2329 2330 void java_lang_reflect_Field::set_modifiers(oop field, int value) { 2331 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2332 field->int_field_put(modifiers_offset, value); 2333 } 2334 2335 bool java_lang_reflect_Field::has_signature_field() { 2336 return (signature_offset >= 0); 2337 } 2338 2339 oop java_lang_reflect_Field::signature(oop field) { 2340 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2341 assert(has_signature_field(), "signature field must be present"); 2342 return field->obj_field(signature_offset); 2343 } 2344 2345 void java_lang_reflect_Field::set_signature(oop field, oop value) { 2346 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2347 assert(has_signature_field(), "signature field must be present"); 2348 field->obj_field_put(signature_offset, value); 2349 } 2350 2351 bool java_lang_reflect_Field::has_annotations_field() { 2352 return (annotations_offset >= 0); 2353 } 2354 2355 oop java_lang_reflect_Field::annotations(oop field) { 2356 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2357 assert(has_annotations_field(), "annotations field must be present"); 2358 return field->obj_field(annotations_offset); 2359 } 2360 2361 void java_lang_reflect_Field::set_annotations(oop field, oop value) { 2362 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2363 assert(has_annotations_field(), "annotations field must be present"); 2364 field->obj_field_put(annotations_offset, value); 2365 } 2366 2367 bool java_lang_reflect_Field::has_type_annotations_field() { 2368 return (type_annotations_offset >= 0); 2369 } 2370 2371 oop java_lang_reflect_Field::type_annotations(oop field) { 2372 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2373 assert(has_type_annotations_field(), "type_annotations field must be present"); 2374 return field->obj_field(type_annotations_offset); 2375 } 2376 2377 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) { 2378 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2379 assert(has_type_annotations_field(), "type_annotations field must be present"); 2380 field->obj_field_put(type_annotations_offset, value); 2381 } 2382 2383 void sun_reflect_ConstantPool::compute_offsets() { 2384 Klass* k = SystemDictionary::reflect_ConstantPool_klass(); 2385 // This null test can be removed post beta 2386 if (k != NULL) { 2387 // The field is called ConstantPool* in the sun.reflect.ConstantPool class. 2388 compute_offset(_oop_offset, k, vmSymbols::ConstantPool_name(), vmSymbols::object_signature()); 2389 } 2390 } 2391 2392 void java_lang_reflect_Parameter::compute_offsets() { 2393 Klass* k = SystemDictionary::reflect_Parameter_klass(); 2394 if(NULL != k) { 2395 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2396 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2397 compute_offset(index_offset, k, vmSymbols::index_name(), vmSymbols::int_signature()); 2398 compute_offset(executable_offset, k, vmSymbols::executable_name(), vmSymbols::executable_signature()); 2399 } 2400 } 2401 2402 Handle java_lang_reflect_Parameter::create(TRAPS) { 2403 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2404 Symbol* name = vmSymbols::java_lang_reflect_Parameter(); 2405 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2406 instanceKlassHandle klass (THREAD, k); 2407 // Ensure it is initialized 2408 klass->initialize(CHECK_NH); 2409 return klass->allocate_instance_handle(CHECK_NH); 2410 } 2411 2412 oop java_lang_reflect_Parameter::name(oop param) { 2413 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2414 return param->obj_field(name_offset); 2415 } 2416 2417 void java_lang_reflect_Parameter::set_name(oop param, oop value) { 2418 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2419 param->obj_field_put(name_offset, value); 2420 } 2421 2422 int java_lang_reflect_Parameter::modifiers(oop param) { 2423 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2424 return param->int_field(modifiers_offset); 2425 } 2426 2427 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) { 2428 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2429 param->int_field_put(modifiers_offset, value); 2430 } 2431 2432 int java_lang_reflect_Parameter::index(oop param) { 2433 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2434 return param->int_field(index_offset); 2435 } 2436 2437 void java_lang_reflect_Parameter::set_index(oop param, int value) { 2438 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2439 param->int_field_put(index_offset, value); 2440 } 2441 2442 oop java_lang_reflect_Parameter::executable(oop param) { 2443 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2444 return param->obj_field(executable_offset); 2445 } 2446 2447 void java_lang_reflect_Parameter::set_executable(oop param, oop value) { 2448 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2449 param->obj_field_put(executable_offset, value); 2450 } 2451 2452 2453 Handle sun_reflect_ConstantPool::create(TRAPS) { 2454 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2455 Klass* k = SystemDictionary::reflect_ConstantPool_klass(); 2456 instanceKlassHandle klass (THREAD, k); 2457 // Ensure it is initialized 2458 klass->initialize(CHECK_NH); 2459 return klass->allocate_instance_handle(CHECK_NH); 2460 } 2461 2462 2463 void sun_reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) { 2464 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2465 oop mirror = value->pool_holder()->java_mirror(); 2466 // Save the mirror to get back the constant pool. 2467 reflect->obj_field_put(_oop_offset, mirror); 2468 } 2469 2470 ConstantPool* sun_reflect_ConstantPool::get_cp(oop reflect) { 2471 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2472 2473 oop mirror = reflect->obj_field(_oop_offset); 2474 Klass* k = java_lang_Class::as_Klass(mirror); 2475 assert(k->oop_is_instance(), "Must be"); 2476 2477 // Get the constant pool back from the klass. Since class redefinition 2478 // merges the new constant pool into the old, this is essentially the 2479 // same constant pool as the original. If constant pool merging is 2480 // no longer done in the future, this will have to change to save 2481 // the original. 2482 return InstanceKlass::cast(k)->constants(); 2483 } 2484 2485 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() { 2486 Klass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass(); 2487 // This null test can be removed post beta 2488 if (k != NULL) { 2489 compute_offset(_base_offset, k, 2490 vmSymbols::base_name(), vmSymbols::object_signature()); 2491 } 2492 } 2493 2494 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 2495 Klass* k = SystemDictionary::box_klass(type); 2496 if (k == NULL) return NULL; 2497 instanceKlassHandle h (THREAD, k); 2498 if (!h->is_initialized()) h->initialize(CHECK_0); 2499 return h->allocate_instance(THREAD); 2500 } 2501 2502 2503 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 2504 oop box = initialize_and_allocate(type, CHECK_0); 2505 if (box == NULL) return NULL; 2506 switch (type) { 2507 case T_BOOLEAN: 2508 box->bool_field_put(value_offset, value->z); 2509 break; 2510 case T_CHAR: 2511 box->char_field_put(value_offset, value->c); 2512 break; 2513 case T_FLOAT: 2514 box->float_field_put(value_offset, value->f); 2515 break; 2516 case T_DOUBLE: 2517 box->double_field_put(long_value_offset, value->d); 2518 break; 2519 case T_BYTE: 2520 box->byte_field_put(value_offset, value->b); 2521 break; 2522 case T_SHORT: 2523 box->short_field_put(value_offset, value->s); 2524 break; 2525 case T_INT: 2526 box->int_field_put(value_offset, value->i); 2527 break; 2528 case T_LONG: 2529 box->long_field_put(long_value_offset, value->j); 2530 break; 2531 default: 2532 return NULL; 2533 } 2534 return box; 2535 } 2536 2537 2538 BasicType java_lang_boxing_object::basic_type(oop box) { 2539 if (box == NULL) return T_ILLEGAL; 2540 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2541 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 2542 return T_ILLEGAL; 2543 return type; 2544 } 2545 2546 2547 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 2548 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2549 switch (type) { 2550 case T_BOOLEAN: 2551 value->z = box->bool_field(value_offset); 2552 break; 2553 case T_CHAR: 2554 value->c = box->char_field(value_offset); 2555 break; 2556 case T_FLOAT: 2557 value->f = box->float_field(value_offset); 2558 break; 2559 case T_DOUBLE: 2560 value->d = box->double_field(long_value_offset); 2561 break; 2562 case T_BYTE: 2563 value->b = box->byte_field(value_offset); 2564 break; 2565 case T_SHORT: 2566 value->s = box->short_field(value_offset); 2567 break; 2568 case T_INT: 2569 value->i = box->int_field(value_offset); 2570 break; 2571 case T_LONG: 2572 value->j = box->long_field(long_value_offset); 2573 break; 2574 default: 2575 return T_ILLEGAL; 2576 } // end switch 2577 return type; 2578 } 2579 2580 2581 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 2582 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2583 switch (type) { 2584 case T_BOOLEAN: 2585 box->bool_field_put(value_offset, value->z); 2586 break; 2587 case T_CHAR: 2588 box->char_field_put(value_offset, value->c); 2589 break; 2590 case T_FLOAT: 2591 box->float_field_put(value_offset, value->f); 2592 break; 2593 case T_DOUBLE: 2594 box->double_field_put(long_value_offset, value->d); 2595 break; 2596 case T_BYTE: 2597 box->byte_field_put(value_offset, value->b); 2598 break; 2599 case T_SHORT: 2600 box->short_field_put(value_offset, value->s); 2601 break; 2602 case T_INT: 2603 box->int_field_put(value_offset, value->i); 2604 break; 2605 case T_LONG: 2606 box->long_field_put(long_value_offset, value->j); 2607 break; 2608 default: 2609 return T_ILLEGAL; 2610 } // end switch 2611 return type; 2612 } 2613 2614 2615 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) { 2616 switch (type) { 2617 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break; 2618 case T_CHAR: st->print("%d", value->c); break; 2619 case T_BYTE: st->print("%d", value->b); break; 2620 case T_SHORT: st->print("%d", value->s); break; 2621 case T_INT: st->print("%d", value->i); break; 2622 case T_LONG: st->print(INT64_FORMAT, value->j); break; 2623 case T_FLOAT: st->print("%f", value->f); break; 2624 case T_DOUBLE: st->print("%lf", value->d); break; 2625 default: st->print("type %d?", type); break; 2626 } 2627 } 2628 2629 2630 // Support for java_lang_ref_Reference 2631 HeapWord *java_lang_ref_Reference::pending_list_lock_addr() { 2632 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass()); 2633 address addr = ik->static_field_addr(static_lock_offset); 2634 return (HeapWord*) addr; 2635 } 2636 2637 oop java_lang_ref_Reference::pending_list_lock() { 2638 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass()); 2639 address addr = ik->static_field_addr(static_lock_offset); 2640 if (UseCompressedOops) { 2641 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 2642 } else { 2643 return oopDesc::load_decode_heap_oop((oop*)addr); 2644 } 2645 } 2646 2647 HeapWord *java_lang_ref_Reference::pending_list_addr() { 2648 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass()); 2649 address addr = ik->static_field_addr(static_pending_offset); 2650 // XXX This might not be HeapWord aligned, almost rather be char *. 2651 return (HeapWord*)addr; 2652 } 2653 2654 oop java_lang_ref_Reference::pending_list() { 2655 char *addr = (char *)pending_list_addr(); 2656 if (UseCompressedOops) { 2657 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 2658 } else { 2659 return oopDesc::load_decode_heap_oop((oop*)addr); 2660 } 2661 } 2662 2663 2664 // Support for java_lang_ref_SoftReference 2665 2666 jlong java_lang_ref_SoftReference::timestamp(oop ref) { 2667 return ref->long_field(timestamp_offset); 2668 } 2669 2670 jlong java_lang_ref_SoftReference::clock() { 2671 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass()); 2672 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset); 2673 return *offset; 2674 } 2675 2676 void java_lang_ref_SoftReference::set_clock(jlong value) { 2677 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass()); 2678 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset); 2679 *offset = value; 2680 } 2681 2682 // Support for java_lang_ref_ReferenceQueue 2683 2684 oop java_lang_ref_ReferenceQueue::NULL_queue() { 2685 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::ReferenceQueue_klass()); 2686 oop mirror = ik->java_mirror(); 2687 return mirror->obj_field(static_NULL_queue_offset); 2688 } 2689 2690 oop java_lang_ref_ReferenceQueue::ENQUEUED_queue() { 2691 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::ReferenceQueue_klass()); 2692 oop mirror = ik->java_mirror(); 2693 return mirror->obj_field(static_ENQUEUED_queue_offset); 2694 } 2695 2696 void java_lang_ref_ReferenceQueue::compute_offsets() { 2697 Klass* k = SystemDictionary::ReferenceQueue_klass(); 2698 compute_offset(static_NULL_queue_offset, 2699 k, 2700 vmSymbols::referencequeue_null_name(), 2701 vmSymbols::referencequeue_signature()); 2702 compute_offset(static_ENQUEUED_queue_offset, 2703 k, 2704 vmSymbols::referencequeue_enqueued_name(), 2705 vmSymbols::referencequeue_signature()); 2706 } 2707 2708 // Support for java_lang_invoke_DirectMethodHandle 2709 2710 int java_lang_invoke_DirectMethodHandle::_member_offset; 2711 2712 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) { 2713 oop member_name = NULL; 2714 bool is_dmh = dmh->is_oop() && java_lang_invoke_DirectMethodHandle::is_instance(dmh); 2715 assert(is_dmh, "a DirectMethodHandle oop is expected"); 2716 if (is_dmh) { 2717 member_name = dmh->obj_field(member_offset_in_bytes()); 2718 } 2719 return member_name; 2720 } 2721 2722 void java_lang_invoke_DirectMethodHandle::compute_offsets() { 2723 Klass* klass_oop = SystemDictionary::DirectMethodHandle_klass(); 2724 if (klass_oop != NULL && EnableInvokeDynamic) { 2725 compute_offset(_member_offset, klass_oop, vmSymbols::member_name(), vmSymbols::java_lang_invoke_MemberName_signature()); 2726 } 2727 } 2728 2729 // Support for java_lang_invoke_MethodHandle 2730 2731 int java_lang_invoke_MethodHandle::_type_offset; 2732 int java_lang_invoke_MethodHandle::_form_offset; 2733 2734 int java_lang_invoke_MemberName::_clazz_offset; 2735 int java_lang_invoke_MemberName::_name_offset; 2736 int java_lang_invoke_MemberName::_type_offset; 2737 int java_lang_invoke_MemberName::_flags_offset; 2738 int java_lang_invoke_MemberName::_vmtarget_offset; 2739 int java_lang_invoke_MemberName::_vmloader_offset; 2740 int java_lang_invoke_MemberName::_vmindex_offset; 2741 2742 int java_lang_invoke_LambdaForm::_vmentry_offset; 2743 2744 void java_lang_invoke_MethodHandle::compute_offsets() { 2745 Klass* klass_oop = SystemDictionary::MethodHandle_klass(); 2746 if (klass_oop != NULL && EnableInvokeDynamic) { 2747 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature()); 2748 compute_optional_offset(_form_offset, klass_oop, vmSymbols::form_name(), vmSymbols::java_lang_invoke_LambdaForm_signature()); 2749 if (_form_offset == 0) { 2750 EnableInvokeDynamic = false; 2751 } 2752 } 2753 } 2754 2755 void java_lang_invoke_MemberName::compute_offsets() { 2756 Klass* klass_oop = SystemDictionary::MemberName_klass(); 2757 if (klass_oop != NULL && EnableInvokeDynamic) { 2758 compute_offset(_clazz_offset, klass_oop, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2759 compute_offset(_name_offset, klass_oop, vmSymbols::name_name(), vmSymbols::string_signature()); 2760 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::object_signature()); 2761 compute_offset(_flags_offset, klass_oop, vmSymbols::flags_name(), vmSymbols::int_signature()); 2762 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 2763 } 2764 } 2765 2766 void java_lang_invoke_LambdaForm::compute_offsets() { 2767 Klass* klass_oop = SystemDictionary::LambdaForm_klass(); 2768 if (klass_oop != NULL && EnableInvokeDynamic) { 2769 compute_offset(_vmentry_offset, klass_oop, vmSymbols::vmentry_name(), vmSymbols::java_lang_invoke_MemberName_signature()); 2770 } 2771 } 2772 2773 oop java_lang_invoke_MethodHandle::type(oop mh) { 2774 return mh->obj_field(_type_offset); 2775 } 2776 2777 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) { 2778 mh->obj_field_put(_type_offset, mtype); 2779 } 2780 2781 oop java_lang_invoke_MethodHandle::form(oop mh) { 2782 assert(_form_offset != 0, ""); 2783 return mh->obj_field(_form_offset); 2784 } 2785 2786 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) { 2787 assert(_form_offset != 0, ""); 2788 mh->obj_field_put(_form_offset, lform); 2789 } 2790 2791 /// MemberName accessors 2792 2793 oop java_lang_invoke_MemberName::clazz(oop mname) { 2794 assert(is_instance(mname), "wrong type"); 2795 return mname->obj_field(_clazz_offset); 2796 } 2797 2798 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) { 2799 assert(is_instance(mname), "wrong type"); 2800 mname->obj_field_put(_clazz_offset, clazz); 2801 } 2802 2803 oop java_lang_invoke_MemberName::name(oop mname) { 2804 assert(is_instance(mname), "wrong type"); 2805 return mname->obj_field(_name_offset); 2806 } 2807 2808 void java_lang_invoke_MemberName::set_name(oop mname, oop name) { 2809 assert(is_instance(mname), "wrong type"); 2810 mname->obj_field_put(_name_offset, name); 2811 } 2812 2813 oop java_lang_invoke_MemberName::type(oop mname) { 2814 assert(is_instance(mname), "wrong type"); 2815 return mname->obj_field(_type_offset); 2816 } 2817 2818 void java_lang_invoke_MemberName::set_type(oop mname, oop type) { 2819 assert(is_instance(mname), "wrong type"); 2820 mname->obj_field_put(_type_offset, type); 2821 } 2822 2823 int java_lang_invoke_MemberName::flags(oop mname) { 2824 assert(is_instance(mname), "wrong type"); 2825 return mname->int_field(_flags_offset); 2826 } 2827 2828 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) { 2829 assert(is_instance(mname), "wrong type"); 2830 mname->int_field_put(_flags_offset, flags); 2831 } 2832 2833 Metadata* java_lang_invoke_MemberName::vmtarget(oop mname) { 2834 assert(is_instance(mname), "wrong type"); 2835 return (Metadata*)mname->address_field(_vmtarget_offset); 2836 } 2837 2838 bool java_lang_invoke_MemberName::is_method(oop mname) { 2839 assert(is_instance(mname), "must be MemberName"); 2840 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0; 2841 } 2842 2843 void java_lang_invoke_MemberName::set_vmtarget(oop mname, Metadata* ref) { 2844 assert(is_instance(mname), "wrong type"); 2845 // check the type of the vmtarget 2846 oop dependency = NULL; 2847 if (ref != NULL) { 2848 switch (flags(mname) & (MN_IS_METHOD | 2849 MN_IS_CONSTRUCTOR | 2850 MN_IS_FIELD)) { 2851 case MN_IS_METHOD: 2852 case MN_IS_CONSTRUCTOR: 2853 assert(ref->is_method(), "should be a method"); 2854 dependency = ((Method*)ref)->method_holder()->java_mirror(); 2855 break; 2856 case MN_IS_FIELD: 2857 assert(ref->is_klass(), "should be a class"); 2858 dependency = ((Klass*)ref)->java_mirror(); 2859 break; 2860 default: 2861 ShouldNotReachHere(); 2862 } 2863 } 2864 mname->address_field_put(_vmtarget_offset, (address)ref); 2865 // Add a reference to the loader (actually mirror because anonymous classes will not have 2866 // distinct loaders) to ensure the metadata is kept alive 2867 // This mirror may be different than the one in clazz field. 2868 mname->obj_field_put(_vmloader_offset, dependency); 2869 } 2870 2871 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) { 2872 assert(is_instance(mname), "wrong type"); 2873 return (intptr_t) mname->address_field(_vmindex_offset); 2874 } 2875 2876 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) { 2877 assert(is_instance(mname), "wrong type"); 2878 mname->address_field_put(_vmindex_offset, (address) index); 2879 } 2880 2881 bool java_lang_invoke_MemberName::equals(oop mn1, oop mn2) { 2882 if (mn1 == mn2) { 2883 return true; 2884 } 2885 return (vmtarget(mn1) == vmtarget(mn2) && flags(mn1) == flags(mn2) && 2886 vmindex(mn1) == vmindex(mn2) && 2887 clazz(mn1) == clazz(mn2)); 2888 } 2889 2890 oop java_lang_invoke_LambdaForm::vmentry(oop lform) { 2891 assert(is_instance(lform), "wrong type"); 2892 return lform->obj_field(_vmentry_offset); 2893 } 2894 2895 2896 // Support for java_lang_invoke_MethodType 2897 2898 int java_lang_invoke_MethodType::_rtype_offset; 2899 int java_lang_invoke_MethodType::_ptypes_offset; 2900 2901 void java_lang_invoke_MethodType::compute_offsets() { 2902 Klass* k = SystemDictionary::MethodType_klass(); 2903 if (k != NULL) { 2904 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature()); 2905 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature()); 2906 } 2907 } 2908 2909 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) { 2910 st->print("("); 2911 objArrayOop pts = ptypes(mt); 2912 for (int i = 0, limit = pts->length(); i < limit; i++) { 2913 java_lang_Class::print_signature(pts->obj_at(i), st); 2914 } 2915 st->print(")"); 2916 java_lang_Class::print_signature(rtype(mt), st); 2917 } 2918 2919 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) { 2920 ResourceMark rm; 2921 stringStream buffer(128); 2922 print_signature(mt, &buffer); 2923 const char* sigstr = buffer.base(); 2924 int siglen = (int) buffer.size(); 2925 Symbol *name; 2926 if (!intern_if_not_found) { 2927 name = SymbolTable::probe(sigstr, siglen); 2928 } else { 2929 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 2930 } 2931 return name; 2932 } 2933 2934 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) { 2935 if (mt1 == mt2) 2936 return true; 2937 if (rtype(mt1) != rtype(mt2)) 2938 return false; 2939 if (ptype_count(mt1) != ptype_count(mt2)) 2940 return false; 2941 for (int i = ptype_count(mt1) - 1; i >= 0; i--) { 2942 if (ptype(mt1, i) != ptype(mt2, i)) 2943 return false; 2944 } 2945 return true; 2946 } 2947 2948 oop java_lang_invoke_MethodType::rtype(oop mt) { 2949 assert(is_instance(mt), "must be a MethodType"); 2950 return mt->obj_field(_rtype_offset); 2951 } 2952 2953 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) { 2954 assert(is_instance(mt), "must be a MethodType"); 2955 return (objArrayOop) mt->obj_field(_ptypes_offset); 2956 } 2957 2958 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) { 2959 return ptypes(mt)->obj_at(idx); 2960 } 2961 2962 int java_lang_invoke_MethodType::ptype_count(oop mt) { 2963 return ptypes(mt)->length(); 2964 } 2965 2966 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) { 2967 objArrayOop pts = ptypes(mt); 2968 int count = pts->length(); 2969 int slots = 0; 2970 for (int i = 0; i < count; i++) { 2971 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i)); 2972 slots += type2size[bt]; 2973 } 2974 return slots; 2975 } 2976 2977 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) { 2978 BasicType bt = java_lang_Class::as_BasicType(rtype(mt)); 2979 return type2size[bt]; 2980 } 2981 2982 2983 // Support for java_lang_invoke_CallSite 2984 2985 int java_lang_invoke_CallSite::_target_offset; 2986 2987 void java_lang_invoke_CallSite::compute_offsets() { 2988 if (!EnableInvokeDynamic) return; 2989 Klass* k = SystemDictionary::CallSite_klass(); 2990 if (k != NULL) { 2991 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature()); 2992 } 2993 } 2994 2995 2996 // Support for java_security_AccessControlContext 2997 2998 int java_security_AccessControlContext::_context_offset = 0; 2999 int java_security_AccessControlContext::_privilegedContext_offset = 0; 3000 int java_security_AccessControlContext::_isPrivileged_offset = 0; 3001 int java_security_AccessControlContext::_isAuthorized_offset = -1; 3002 3003 void java_security_AccessControlContext::compute_offsets() { 3004 assert(_isPrivileged_offset == 0, "offsets should be initialized only once"); 3005 fieldDescriptor fd; 3006 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass()); 3007 3008 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) { 3009 fatal("Invalid layout of java.security.AccessControlContext"); 3010 } 3011 _context_offset = fd.offset(); 3012 3013 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) { 3014 fatal("Invalid layout of java.security.AccessControlContext"); 3015 } 3016 _privilegedContext_offset = fd.offset(); 3017 3018 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) { 3019 fatal("Invalid layout of java.security.AccessControlContext"); 3020 } 3021 _isPrivileged_offset = fd.offset(); 3022 3023 // The offset may not be present for bootstrapping with older JDK. 3024 if (ik->find_local_field(vmSymbols::isAuthorized_name(), vmSymbols::bool_signature(), &fd)) { 3025 _isAuthorized_offset = fd.offset(); 3026 } 3027 } 3028 3029 3030 bool java_security_AccessControlContext::is_authorized(Handle context) { 3031 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type"); 3032 assert(_isAuthorized_offset != -1, "should be set"); 3033 return context->bool_field(_isAuthorized_offset) != 0; 3034 } 3035 3036 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) { 3037 assert(_isPrivileged_offset != 0, "offsets should have been initialized"); 3038 // Ensure klass is initialized 3039 InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->initialize(CHECK_0); 3040 // Allocate result 3041 oop result = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->allocate_instance(CHECK_0); 3042 // Fill in values 3043 result->obj_field_put(_context_offset, context()); 3044 result->obj_field_put(_privilegedContext_offset, privileged_context()); 3045 result->bool_field_put(_isPrivileged_offset, isPrivileged); 3046 // whitelist AccessControlContexts created by the JVM if present 3047 if (_isAuthorized_offset != -1) { 3048 result->bool_field_put(_isAuthorized_offset, true); 3049 } 3050 return result; 3051 } 3052 3053 3054 // Support for java_lang_ClassLoader 3055 3056 bool java_lang_ClassLoader::offsets_computed = false; 3057 int java_lang_ClassLoader::_loader_data_offset = -1; 3058 int java_lang_ClassLoader::parallelCapable_offset = -1; 3059 3060 ClassLoaderData** java_lang_ClassLoader::loader_data_addr(oop loader) { 3061 assert(loader != NULL && loader->is_oop(), "loader must be oop"); 3062 return (ClassLoaderData**) loader->address_field_addr(_loader_data_offset); 3063 } 3064 3065 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) { 3066 return *java_lang_ClassLoader::loader_data_addr(loader); 3067 } 3068 3069 void java_lang_ClassLoader::compute_offsets() { 3070 assert(!offsets_computed, "offsets should be initialized only once"); 3071 offsets_computed = true; 3072 3073 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7, 3074 Klass* k1 = SystemDictionary::ClassLoader_klass(); 3075 compute_optional_offset(parallelCapable_offset, 3076 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature()); 3077 3078 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3079 } 3080 3081 oop java_lang_ClassLoader::parent(oop loader) { 3082 assert(is_instance(loader), "loader must be oop"); 3083 return loader->obj_field(parent_offset); 3084 } 3085 3086 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) { 3087 assert(is_instance(loader), "loader must be oop"); 3088 assert(cl == NULL || is_instance(cl), "cl argument must be oop"); 3089 oop acl = loader; 3090 debug_only(jint loop_count = 0); 3091 // This loop taken verbatim from ClassLoader.java: 3092 do { 3093 acl = parent(acl); 3094 if (cl == acl) { 3095 return true; 3096 } 3097 assert(++loop_count > 0, "loop_count overflow"); 3098 } while (acl != NULL); 3099 return false; 3100 } 3101 3102 3103 // For class loader classes, parallelCapable defined 3104 // based on non-null field 3105 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it 3106 bool java_lang_ClassLoader::parallelCapable(oop class_loader) { 3107 if (!JDK_Version::is_gte_jdk17x_version() 3108 || parallelCapable_offset == -1) { 3109 // Default for backward compatibility is false 3110 return false; 3111 } 3112 return (class_loader->obj_field(parallelCapable_offset) != NULL); 3113 } 3114 3115 bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 3116 // Fix for 4474172; see evaluation for more details 3117 loader = non_reflection_class_loader(loader); 3118 3119 oop cl = SystemDictionary::java_system_loader(); 3120 while(cl != NULL) { 3121 if (cl == loader) return true; 3122 cl = parent(cl); 3123 } 3124 return false; 3125 } 3126 3127 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) { 3128 if (loader != NULL) { 3129 // See whether this is one of the class loaders associated with 3130 // the generated bytecodes for reflection, and if so, "magically" 3131 // delegate to its parent to prevent class loading from occurring 3132 // in places where applications using reflection didn't expect it. 3133 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass(); 3134 // This might be null in non-1.4 JDKs 3135 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) { 3136 return parent(loader); 3137 } 3138 } 3139 return loader; 3140 } 3141 3142 3143 // Support for java_lang_System 3144 int java_lang_System::in_offset_in_bytes() { 3145 return (InstanceMirrorKlass::offset_of_static_fields() + static_in_offset); 3146 } 3147 3148 3149 int java_lang_System::out_offset_in_bytes() { 3150 return (InstanceMirrorKlass::offset_of_static_fields() + static_out_offset); 3151 } 3152 3153 3154 int java_lang_System::err_offset_in_bytes() { 3155 return (InstanceMirrorKlass::offset_of_static_fields() + static_err_offset); 3156 } 3157 3158 3159 bool java_lang_System::has_security_manager() { 3160 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::System_klass()); 3161 address addr = ik->static_field_addr(static_security_offset); 3162 if (UseCompressedOops) { 3163 return oopDesc::load_decode_heap_oop((narrowOop *)addr) != NULL; 3164 } else { 3165 return oopDesc::load_decode_heap_oop((oop*)addr) != NULL; 3166 } 3167 } 3168 3169 int java_lang_Class::_klass_offset; 3170 int java_lang_Class::_array_klass_offset; 3171 int java_lang_Class::_oop_size_offset; 3172 int java_lang_Class::_static_oop_field_count_offset; 3173 int java_lang_Class::_class_loader_offset; 3174 int java_lang_Class::_protection_domain_offset; 3175 int java_lang_Class::_init_lock_offset; 3176 int java_lang_Class::_signers_offset; 3177 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL; 3178 int java_lang_Throwable::backtrace_offset; 3179 int java_lang_Throwable::detailMessage_offset; 3180 int java_lang_Throwable::cause_offset; 3181 int java_lang_Throwable::stackTrace_offset; 3182 int java_lang_Throwable::static_unassigned_stacktrace_offset; 3183 int java_lang_reflect_AccessibleObject::override_offset; 3184 int java_lang_reflect_Method::clazz_offset; 3185 int java_lang_reflect_Method::name_offset; 3186 int java_lang_reflect_Method::returnType_offset; 3187 int java_lang_reflect_Method::parameterTypes_offset; 3188 int java_lang_reflect_Method::exceptionTypes_offset; 3189 int java_lang_reflect_Method::slot_offset; 3190 int java_lang_reflect_Method::modifiers_offset; 3191 int java_lang_reflect_Method::signature_offset; 3192 int java_lang_reflect_Method::annotations_offset; 3193 int java_lang_reflect_Method::parameter_annotations_offset; 3194 int java_lang_reflect_Method::annotation_default_offset; 3195 int java_lang_reflect_Method::type_annotations_offset; 3196 int java_lang_reflect_Constructor::clazz_offset; 3197 int java_lang_reflect_Constructor::parameterTypes_offset; 3198 int java_lang_reflect_Constructor::exceptionTypes_offset; 3199 int java_lang_reflect_Constructor::slot_offset; 3200 int java_lang_reflect_Constructor::modifiers_offset; 3201 int java_lang_reflect_Constructor::signature_offset; 3202 int java_lang_reflect_Constructor::annotations_offset; 3203 int java_lang_reflect_Constructor::parameter_annotations_offset; 3204 int java_lang_reflect_Constructor::type_annotations_offset; 3205 int java_lang_reflect_Field::clazz_offset; 3206 int java_lang_reflect_Field::name_offset; 3207 int java_lang_reflect_Field::type_offset; 3208 int java_lang_reflect_Field::slot_offset; 3209 int java_lang_reflect_Field::modifiers_offset; 3210 int java_lang_reflect_Field::signature_offset; 3211 int java_lang_reflect_Field::annotations_offset; 3212 int java_lang_reflect_Field::type_annotations_offset; 3213 int java_lang_reflect_Parameter::name_offset; 3214 int java_lang_reflect_Parameter::modifiers_offset; 3215 int java_lang_reflect_Parameter::index_offset; 3216 int java_lang_reflect_Parameter::executable_offset; 3217 int java_lang_boxing_object::value_offset; 3218 int java_lang_boxing_object::long_value_offset; 3219 int java_lang_ref_Reference::referent_offset; 3220 int java_lang_ref_Reference::queue_offset; 3221 int java_lang_ref_Reference::next_offset; 3222 int java_lang_ref_Reference::discovered_offset; 3223 int java_lang_ref_Reference::static_lock_offset; 3224 int java_lang_ref_Reference::static_pending_offset; 3225 int java_lang_ref_Reference::number_of_fake_oop_fields; 3226 int java_lang_ref_ReferenceQueue::static_NULL_queue_offset; 3227 int java_lang_ref_ReferenceQueue::static_ENQUEUED_queue_offset; 3228 int java_lang_ref_SoftReference::timestamp_offset; 3229 int java_lang_ref_SoftReference::static_clock_offset; 3230 int java_lang_ClassLoader::parent_offset; 3231 int java_lang_System::static_in_offset; 3232 int java_lang_System::static_out_offset; 3233 int java_lang_System::static_err_offset; 3234 int java_lang_System::static_security_offset; 3235 int java_lang_StackTraceElement::declaringClass_offset; 3236 int java_lang_StackTraceElement::methodName_offset; 3237 int java_lang_StackTraceElement::fileName_offset; 3238 int java_lang_StackTraceElement::lineNumber_offset; 3239 int java_lang_AssertionStatusDirectives::classes_offset; 3240 int java_lang_AssertionStatusDirectives::classEnabled_offset; 3241 int java_lang_AssertionStatusDirectives::packages_offset; 3242 int java_lang_AssertionStatusDirectives::packageEnabled_offset; 3243 int java_lang_AssertionStatusDirectives::deflt_offset; 3244 int java_nio_Buffer::_limit_offset; 3245 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0; 3246 int sun_reflect_ConstantPool::_oop_offset; 3247 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset; 3248 3249 3250 // Support for java_lang_StackTraceElement 3251 3252 void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 3253 element->obj_field_put(fileName_offset, value); 3254 } 3255 3256 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 3257 element->obj_field_put(declaringClass_offset, value); 3258 } 3259 3260 void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 3261 element->obj_field_put(methodName_offset, value); 3262 } 3263 3264 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 3265 element->int_field_put(lineNumber_offset, value); 3266 } 3267 3268 3269 // Support for java Assertions - java_lang_AssertionStatusDirectives. 3270 3271 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 3272 o->obj_field_put(classes_offset, val); 3273 } 3274 3275 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 3276 o->obj_field_put(classEnabled_offset, val); 3277 } 3278 3279 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 3280 o->obj_field_put(packages_offset, val); 3281 } 3282 3283 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 3284 o->obj_field_put(packageEnabled_offset, val); 3285 } 3286 3287 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 3288 o->bool_field_put(deflt_offset, val); 3289 } 3290 3291 3292 // Support for intrinsification of java.nio.Buffer.checkIndex 3293 int java_nio_Buffer::limit_offset() { 3294 return _limit_offset; 3295 } 3296 3297 3298 void java_nio_Buffer::compute_offsets() { 3299 Klass* k = SystemDictionary::nio_Buffer_klass(); 3300 assert(k != NULL, "must be loaded in 1.4+"); 3301 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature()); 3302 } 3303 3304 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) { 3305 if (_owner_offset != 0) return; 3306 3307 assert(JDK_Version::is_gte_jdk16x_version(), "Must be JDK 1.6 or later"); 3308 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK); 3309 Klass* k = SystemDictionary::abstract_ownable_synchronizer_klass(); 3310 compute_offset(_owner_offset, k, 3311 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature()); 3312 } 3313 3314 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 3315 assert(_owner_offset != 0, "Must be initialized"); 3316 return obj->obj_field(_owner_offset); 3317 } 3318 3319 // Compute hard-coded offsets 3320 // Invoked before SystemDictionary::initialize, so pre-loaded classes 3321 // are not available to determine the offset_of_static_fields. 3322 void JavaClasses::compute_hard_coded_offsets() { 3323 const int x = heapOopSize; 3324 const int header = instanceOopDesc::base_offset_in_bytes(); 3325 3326 // Throwable Class 3327 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header; 3328 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header; 3329 java_lang_Throwable::cause_offset = java_lang_Throwable::hc_cause_offset * x + header; 3330 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header; 3331 java_lang_Throwable::static_unassigned_stacktrace_offset = java_lang_Throwable::hc_static_unassigned_stacktrace_offset * x; 3332 3333 // java_lang_boxing_object 3334 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header; 3335 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong); 3336 3337 // java_lang_ref_Reference: 3338 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header; 3339 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header; 3340 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header; 3341 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header; 3342 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x; 3343 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x; 3344 // Artificial fields for java_lang_ref_Reference 3345 // The first field is for the discovered field added in 1.4 3346 java_lang_ref_Reference::number_of_fake_oop_fields = 1; 3347 3348 // java_lang_ref_SoftReference Class 3349 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong); 3350 // Don't multiply static fields because they are always in wordSize units 3351 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x; 3352 3353 // java_lang_ClassLoader 3354 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header; 3355 3356 // java_lang_System 3357 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x; 3358 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x; 3359 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x; 3360 java_lang_System::static_security_offset = java_lang_System::hc_static_security_offset * x; 3361 3362 // java_lang_StackTraceElement 3363 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header; 3364 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header; 3365 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header; 3366 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header; 3367 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header; 3368 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header; 3369 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header; 3370 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header; 3371 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header; 3372 3373 } 3374 3375 3376 // Compute non-hard-coded field offsets of all the classes in this file 3377 void JavaClasses::compute_offsets() { 3378 // java_lang_Class::compute_offsets was called earlier in bootstrap 3379 java_lang_ClassLoader::compute_offsets(); 3380 java_lang_Thread::compute_offsets(); 3381 java_lang_ThreadGroup::compute_offsets(); 3382 if (EnableInvokeDynamic) { 3383 java_lang_invoke_MethodHandle::compute_offsets(); 3384 java_lang_invoke_DirectMethodHandle::compute_offsets(); 3385 java_lang_invoke_MemberName::compute_offsets(); 3386 java_lang_invoke_LambdaForm::compute_offsets(); 3387 java_lang_invoke_MethodType::compute_offsets(); 3388 java_lang_invoke_CallSite::compute_offsets(); 3389 } 3390 java_security_AccessControlContext::compute_offsets(); 3391 // Initialize reflection classes. The layouts of these classes 3392 // changed with the new reflection implementation in JDK 1.4, and 3393 // since the Universe doesn't know what JDK version it is until this 3394 // point we defer computation of these offsets until now. 3395 java_lang_reflect_AccessibleObject::compute_offsets(); 3396 java_lang_reflect_Method::compute_offsets(); 3397 java_lang_reflect_Constructor::compute_offsets(); 3398 java_lang_reflect_Field::compute_offsets(); 3399 if (JDK_Version::is_gte_jdk14x_version()) { 3400 java_nio_Buffer::compute_offsets(); 3401 } 3402 if (JDK_Version::is_gte_jdk15x_version()) { 3403 sun_reflect_ConstantPool::compute_offsets(); 3404 sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets(); 3405 } 3406 if (JDK_Version::is_jdk18x_version()) 3407 java_lang_reflect_Parameter::compute_offsets(); 3408 3409 java_lang_ref_ReferenceQueue::compute_offsets(); 3410 3411 // generated interpreter code wants to know about the offsets we just computed: 3412 AbstractAssembler::update_delayed_values(); 3413 } 3414 3415 #ifndef PRODUCT 3416 3417 // These functions exist to assert the validity of hard-coded field offsets to guard 3418 // against changes in the class files 3419 3420 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 3421 EXCEPTION_MARK; 3422 fieldDescriptor fd; 3423 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3424 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3425 instanceKlassHandle h_klass (THREAD, k); 3426 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3427 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3428 if (!h_klass->find_local_field(f_name, f_sig, &fd)) { 3429 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 3430 return false; 3431 } 3432 if (fd.is_static()) { 3433 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 3434 return false; 3435 } 3436 if (fd.offset() == hardcoded_offset ) { 3437 return true; 3438 } else { 3439 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.", 3440 klass_name, field_name, hardcoded_offset, fd.offset()); 3441 return false; 3442 } 3443 } 3444 3445 3446 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 3447 EXCEPTION_MARK; 3448 fieldDescriptor fd; 3449 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3450 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3451 instanceKlassHandle h_klass (THREAD, k); 3452 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3453 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3454 if (!h_klass->find_local_field(f_name, f_sig, &fd)) { 3455 tty->print_cr("Static field %s.%s not found", klass_name, field_name); 3456 return false; 3457 } 3458 if (!fd.is_static()) { 3459 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name); 3460 return false; 3461 } 3462 if (fd.offset() == hardcoded_offset + InstanceMirrorKlass::offset_of_static_fields()) { 3463 return true; 3464 } else { 3465 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()); 3466 return false; 3467 } 3468 } 3469 3470 3471 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) { 3472 EXCEPTION_MARK; 3473 fieldDescriptor fd; 3474 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3475 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3476 instanceKlassHandle h_klass (THREAD, k); 3477 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3478 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3479 if (!h_klass->find_local_field(f_name, f_sig, &fd)) { 3480 tty->print_cr("Static field %s.%s not found", klass_name, field_name); 3481 return false; 3482 } 3483 if (!fd.is_static() || !fd.has_initial_value()) { 3484 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name); 3485 return false; 3486 } 3487 if (!fd.initial_value_tag().is_int()) { 3488 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name); 3489 return false; 3490 } 3491 jint field_value = fd.int_initial_value(); 3492 if (field_value == hardcoded_constant) { 3493 return true; 3494 } else { 3495 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); 3496 return false; 3497 } 3498 } 3499 3500 3501 // Check the hard-coded field offsets of all the classes in this file 3502 3503 void JavaClasses::check_offsets() { 3504 bool valid = true; 3505 HandleMark hm; 3506 3507 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3508 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig) 3509 3510 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3511 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig) 3512 3513 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3514 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig) 3515 3516 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \ 3517 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig) 3518 3519 // java.lang.String 3520 3521 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C"); 3522 if (java_lang_String::has_offset_field()) { 3523 CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I"); 3524 CHECK_OFFSET("java/lang/String", java_lang_String, count, "I"); 3525 } 3526 if (java_lang_String::has_hash_field()) { 3527 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I"); 3528 } 3529 3530 // java.lang.Class 3531 3532 // Fake fields 3533 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked 3534 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked 3535 3536 // java.lang.Throwable 3537 3538 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;"); 3539 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;"); 3540 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;"); 3541 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;"); 3542 3543 // Boxed primitive objects (java_lang_boxing_object) 3544 3545 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 3546 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 3547 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 3548 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 3549 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 3550 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 3551 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 3552 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 3553 3554 // java.lang.ClassLoader 3555 3556 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;"); 3557 3558 // java.lang.System 3559 3560 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;"); 3561 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;"); 3562 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;"); 3563 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, security, "Ljava/lang/SecurityManager;"); 3564 3565 // java.lang.StackTraceElement 3566 3567 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;"); 3568 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;"); 3569 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;"); 3570 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I"); 3571 3572 // java.lang.ref.Reference 3573 3574 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;"); 3575 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;"); 3576 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;"); 3577 // Fake field 3578 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;"); 3579 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;"); 3580 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;"); 3581 3582 // java.lang.ref.SoftReference 3583 3584 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J"); 3585 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J"); 3586 3587 // java.lang.AssertionStatusDirectives 3588 // 3589 // The CheckAssertionStatusDirectives boolean can be removed from here and 3590 // globals.hpp after the AssertionStatusDirectives class has been integrated 3591 // into merlin "for some time." Without it, the vm will fail with early 3592 // merlin builds. 3593 3594 if (CheckAssertionStatusDirectives && JDK_Version::is_gte_jdk14x_version()) { 3595 const char* nm = "java/lang/AssertionStatusDirectives"; 3596 const char* sig = "[Ljava/lang/String;"; 3597 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig); 3598 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z"); 3599 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig); 3600 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z"); 3601 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z"); 3602 } 3603 3604 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed"); 3605 } 3606 3607 #endif // PRODUCT 3608 3609 int InjectedField::compute_offset() { 3610 Klass* klass_oop = klass(); 3611 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) { 3612 if (!may_be_java && !fs.access_flags().is_internal()) { 3613 // Only look at injected fields 3614 continue; 3615 } 3616 if (fs.name() == name() && fs.signature() == signature()) { 3617 return fs.offset(); 3618 } 3619 } 3620 ResourceMark rm; 3621 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)" : ""); 3622 #ifndef PRODUCT 3623 klass_oop->print(); 3624 tty->print_cr("all fields:"); 3625 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) { 3626 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 3627 } 3628 #endif //PRODUCT 3629 vm_exit_during_initialization("Invalid layout of preloaded class: use -XX:+TraceClassLoading to see the origin of the problem class"); 3630 return -1; 3631 } 3632 3633 void javaClasses_init() { 3634 JavaClasses::compute_offsets(); 3635 JavaClasses::check_offsets(); 3636 FilteredFieldsMap::initialize(); // must be done after computing offsets. 3637 }