1 /* 2 * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "classfile/altHashing.hpp" 27 #include "classfile/javaClasses.inline.hpp" 28 #include "classfile/stringTable.hpp" 29 #include "classfile/vmSymbols.hpp" 30 #include "code/debugInfo.hpp" 31 #include "code/pcDesc.hpp" 32 #include "interpreter/interpreter.hpp" 33 #include "memory/oopFactory.hpp" 34 #include "memory/resourceArea.hpp" 35 #include "memory/universe.inline.hpp" 36 #include "oops/fieldStreams.hpp" 37 #include "oops/instanceKlass.hpp" 38 #include "oops/instanceMirrorKlass.hpp" 39 #include "oops/klass.hpp" 40 #include "oops/method.hpp" 41 #include "oops/objArrayOop.inline.hpp" 42 #include "oops/oop.inline.hpp" 43 #include "oops/symbol.hpp" 44 #include "oops/typeArrayOop.hpp" 45 #include "prims/jvmtiRedefineClassesTrace.hpp" 46 #include "runtime/fieldDescriptor.hpp" 47 #include "runtime/handles.inline.hpp" 48 #include "runtime/interfaceSupport.hpp" 49 #include "runtime/java.hpp" 50 #include "runtime/javaCalls.hpp" 51 #include "runtime/safepoint.hpp" 52 #include "runtime/thread.inline.hpp" 53 #include "runtime/vframe.hpp" 54 #include "utilities/preserveException.hpp" 55 56 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC 57 58 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \ 59 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum); 60 61 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \ 62 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java }, 63 64 InjectedField JavaClasses::_injected_fields[] = { 65 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD) 66 }; 67 68 int JavaClasses::compute_injected_offset(InjectedFieldID id) { 69 return _injected_fields[id].compute_offset(); 70 } 71 72 73 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) { 74 *field_count = 0; 75 76 vmSymbols::SID sid = vmSymbols::find_sid(class_name); 77 if (sid == vmSymbols::NO_SID) { 78 // Only well known classes can inject fields 79 return NULL; 80 } 81 82 int count = 0; 83 int start = -1; 84 85 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \ 86 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \ 87 count++; \ 88 if (start == -1) start = klass##_##name##_enum; \ 89 } 90 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD); 91 #undef LOOKUP_INJECTED_FIELD 92 93 if (start != -1) { 94 *field_count = count; 95 return _injected_fields + start; 96 } 97 return NULL; 98 } 99 100 101 static bool find_field(InstanceKlass* ik, 102 Symbol* name_symbol, Symbol* signature_symbol, 103 fieldDescriptor* fd, 104 bool is_static = false, bool allow_super = false) { 105 if (allow_super || is_static) { 106 return ik->find_field(name_symbol, signature_symbol, is_static, fd) != NULL; 107 } else { 108 return ik->find_local_field(name_symbol, signature_symbol, fd); 109 } 110 } 111 112 // Helpful routine for computing field offsets at run time rather than hardcoding them 113 static void 114 compute_offset(int &dest_offset, 115 Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol, 116 bool is_static = false, bool allow_super = false) { 117 fieldDescriptor fd; 118 InstanceKlass* ik = InstanceKlass::cast(klass_oop); 119 if (!find_field(ik, name_symbol, signature_symbol, &fd, is_static, allow_super)) { 120 ResourceMark rm; 121 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string()); 122 #ifndef PRODUCT 123 klass_oop->print(); 124 tty->print_cr("all fields:"); 125 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) { 126 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 127 } 128 #endif //PRODUCT 129 vm_exit_during_initialization("Invalid layout of preloaded class: use -XX:+TraceClassLoading to see the origin of the problem class"); 130 } 131 dest_offset = fd.offset(); 132 } 133 134 // Same as above but for "optional" offsets that might not be present in certain JDK versions 135 static void 136 compute_optional_offset(int& dest_offset, 137 Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol, 138 bool allow_super = false) { 139 fieldDescriptor fd; 140 InstanceKlass* ik = InstanceKlass::cast(klass_oop); 141 if (find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) { 142 dest_offset = fd.offset(); 143 } 144 } 145 146 147 int java_lang_String::value_offset = 0; 148 int java_lang_String::offset_offset = 0; 149 int java_lang_String::count_offset = 0; 150 int java_lang_String::hash_offset = 0; 151 152 bool java_lang_String::initialized = false; 153 154 bool java_lang_String::is_instance(oop obj) { 155 return is_instance_inlined(obj); 156 } 157 158 void java_lang_String::compute_offsets() { 159 assert(!initialized, "offsets should be initialized only once"); 160 161 Klass* k = SystemDictionary::String_klass(); 162 compute_offset(value_offset, k, vmSymbols::value_name(), vmSymbols::char_array_signature()); 163 compute_optional_offset(offset_offset, k, vmSymbols::offset_name(), vmSymbols::int_signature()); 164 compute_optional_offset(count_offset, k, vmSymbols::count_name(), vmSymbols::int_signature()); 165 compute_optional_offset(hash_offset, k, vmSymbols::hash_name(), vmSymbols::int_signature()); 166 167 initialized = true; 168 } 169 170 Handle java_lang_String::basic_create(int length, TRAPS) { 171 assert(initialized, "Must be initialized"); 172 // Create the String object first, so there's a chance that the String 173 // and the char array it points to end up in the same cache line. 174 oop obj; 175 obj = InstanceKlass::cast(SystemDictionary::String_klass())->allocate_instance(CHECK_NH); 176 177 // Create the char array. The String object must be handlized here 178 // because GC can happen as a result of the allocation attempt. 179 Handle h_obj(THREAD, obj); 180 typeArrayOop buffer; 181 buffer = oopFactory::new_charArray(length, CHECK_NH); 182 183 // Point the String at the char array 184 obj = h_obj(); 185 set_value(obj, buffer); 186 // No need to zero the offset, allocation zero'ed the entire String object 187 assert(offset(obj) == 0, "initial String offset should be zero"); 188 //set_offset(obj, 0); 189 set_count(obj, length); 190 191 return h_obj; 192 } 193 194 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) { 195 Handle h_obj = basic_create(length, CHECK_NH); 196 typeArrayOop buffer = value(h_obj()); 197 for (int index = 0; index < length; index++) { 198 buffer->char_at_put(index, unicode[index]); 199 } 200 return h_obj; 201 } 202 203 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) { 204 Handle h_obj = create_from_unicode(unicode, length, CHECK_0); 205 return h_obj(); 206 } 207 208 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) { 209 if (utf8_str == NULL) { 210 return Handle(); 211 } 212 int length = UTF8::unicode_length(utf8_str); 213 Handle h_obj = basic_create(length, CHECK_NH); 214 if (length > 0) { 215 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 216 } 217 return h_obj; 218 } 219 220 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) { 221 Handle h_obj = create_from_str(utf8_str, CHECK_0); 222 return h_obj(); 223 } 224 225 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) { 226 int length = UTF8::unicode_length((char*)symbol->bytes(), symbol->utf8_length()); 227 Handle h_obj = basic_create(length, CHECK_NH); 228 if (length > 0) { 229 UTF8::convert_to_unicode((char*)symbol->bytes(), value(h_obj())->char_at_addr(0), length); 230 } 231 return h_obj; 232 } 233 234 // Converts a C string to a Java String based on current encoding 235 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) { 236 assert(str != NULL, "bad arguments"); 237 238 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *); 239 static to_java_string_fn_t _to_java_string_fn = NULL; 240 241 if (_to_java_string_fn == NULL) { 242 void *lib_handle = os::native_java_library(); 243 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform")); 244 if (_to_java_string_fn == NULL) { 245 fatal("NewStringPlatform missing"); 246 } 247 } 248 249 jstring js = NULL; 250 { JavaThread* thread = (JavaThread*)THREAD; 251 assert(thread->is_Java_thread(), "must be java thread"); 252 HandleMark hm(thread); 253 ThreadToNativeFromVM ttn(thread); 254 js = (_to_java_string_fn)(thread->jni_environment(), str); 255 } 256 return Handle(THREAD, JNIHandles::resolve(js)); 257 } 258 259 // Converts a Java String to a native C string that can be used for 260 // native OS calls. 261 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) { 262 263 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*); 264 static to_platform_string_fn_t _to_platform_string_fn = NULL; 265 266 if (_to_platform_string_fn == NULL) { 267 void *lib_handle = os::native_java_library(); 268 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars")); 269 if (_to_platform_string_fn == NULL) { 270 fatal("GetStringPlatformChars missing"); 271 } 272 } 273 274 char *native_platform_string; 275 { JavaThread* thread = (JavaThread*)THREAD; 276 assert(thread->is_Java_thread(), "must be java thread"); 277 JNIEnv *env = thread->jni_environment(); 278 jstring js = (jstring) JNIHandles::make_local(env, java_string()); 279 bool is_copy; 280 HandleMark hm(thread); 281 ThreadToNativeFromVM ttn(thread); 282 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy); 283 assert(is_copy == JNI_TRUE, "is_copy value changed"); 284 JNIHandles::destroy_local(js); 285 } 286 return native_platform_string; 287 } 288 289 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) { 290 oop obj = java_string(); 291 // Typical usage is to convert all '/' to '.' in string. 292 typeArrayOop value = java_lang_String::value(obj); 293 int offset = java_lang_String::offset(obj); 294 int length = java_lang_String::length(obj); 295 296 // First check if any from_char exist 297 int index; // Declared outside, used later 298 for (index = 0; index < length; index++) { 299 if (value->char_at(index + offset) == from_char) { 300 break; 301 } 302 } 303 if (index == length) { 304 // No from_char, so do not copy. 305 return java_string; 306 } 307 308 // Create new UNICODE buffer. Must handlize value because GC 309 // may happen during String and char array creation. 310 typeArrayHandle h_value(THREAD, value); 311 Handle string = basic_create(length, CHECK_NH); 312 313 typeArrayOop from_buffer = h_value(); 314 typeArrayOop to_buffer = java_lang_String::value(string()); 315 316 // Copy contents 317 for (index = 0; index < length; index++) { 318 jchar c = from_buffer->char_at(index + offset); 319 if (c == from_char) { 320 c = to_char; 321 } 322 to_buffer->char_at_put(index, c); 323 } 324 return string; 325 } 326 327 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) { 328 typeArrayOop value = java_lang_String::value(java_string); 329 int offset = java_lang_String::offset(java_string); 330 length = java_lang_String::length(java_string); 331 332 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length); 333 if (result != NULL) { 334 for (int index = 0; index < length; index++) { 335 result[index] = value->char_at(index + offset); 336 } 337 } else { 338 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string"); 339 } 340 return result; 341 } 342 343 unsigned int java_lang_String::hash_code(oop java_string) { 344 int length = java_lang_String::length(java_string); 345 // Zero length string will hash to zero with String.hashCode() function. 346 if (length == 0) return 0; 347 348 typeArrayOop value = java_lang_String::value(java_string); 349 int offset = java_lang_String::offset(java_string); 350 return java_lang_String::hash_code(value->char_at_addr(offset), length); 351 } 352 353 char* java_lang_String::as_quoted_ascii(oop java_string) { 354 typeArrayOop value = java_lang_String::value(java_string); 355 int offset = java_lang_String::offset(java_string); 356 int length = java_lang_String::length(java_string); 357 358 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset); 359 if (base == NULL) return NULL; 360 361 int result_length = UNICODE::quoted_ascii_length(base, length) + 1; 362 char* result = NEW_RESOURCE_ARRAY(char, result_length); 363 UNICODE::as_quoted_ascii(base, length, result, result_length); 364 assert(result_length >= length + 1, "must not be shorter"); 365 assert(result_length == (int)strlen(result) + 1, "must match"); 366 return result; 367 } 368 369 unsigned int java_lang_String::hash_string(oop java_string) { 370 int length = java_lang_String::length(java_string); 371 // Zero length string doesn't hash necessarily hash to zero. 372 if (length == 0) { 373 return StringTable::hash_string(NULL, 0); 374 } 375 376 typeArrayOop value = java_lang_String::value(java_string); 377 int offset = java_lang_String::offset(java_string); 378 return StringTable::hash_string(value->char_at_addr(offset), length); 379 } 380 381 Symbol* java_lang_String::as_symbol(Handle java_string, TRAPS) { 382 oop obj = java_string(); 383 typeArrayOop value = java_lang_String::value(obj); 384 int offset = java_lang_String::offset(obj); 385 int length = java_lang_String::length(obj); 386 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset); 387 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD); 388 return sym; 389 } 390 391 Symbol* java_lang_String::as_symbol_or_null(oop java_string) { 392 typeArrayOop value = java_lang_String::value(java_string); 393 int offset = java_lang_String::offset(java_string); 394 int length = java_lang_String::length(java_string); 395 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset); 396 return SymbolTable::probe_unicode(base, length); 397 } 398 399 400 int java_lang_String::utf8_length(oop java_string) { 401 typeArrayOop value = java_lang_String::value(java_string); 402 int offset = java_lang_String::offset(java_string); 403 int length = java_lang_String::length(java_string); 404 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset); 405 return UNICODE::utf8_length(position, length); 406 } 407 408 char* java_lang_String::as_utf8_string(oop java_string) { 409 typeArrayOop value = java_lang_String::value(java_string); 410 int offset = java_lang_String::offset(java_string); 411 int length = java_lang_String::length(java_string); 412 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset); 413 return UNICODE::as_utf8(position, length); 414 } 415 416 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) { 417 typeArrayOop value = java_lang_String::value(java_string); 418 int offset = java_lang_String::offset(java_string); 419 int length = java_lang_String::length(java_string); 420 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset); 421 return UNICODE::as_utf8(position, length, buf, buflen); 422 } 423 424 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) { 425 typeArrayOop value = java_lang_String::value(java_string); 426 int offset = java_lang_String::offset(java_string); 427 int length = java_lang_String::length(java_string); 428 assert(start + len <= length, "just checking"); 429 jchar* position = value->char_at_addr(offset + start); 430 return UNICODE::as_utf8(position, len); 431 } 432 433 char* java_lang_String::as_utf8_string(oop java_string, int start, int len, char* buf, int buflen) { 434 typeArrayOop value = java_lang_String::value(java_string); 435 int offset = java_lang_String::offset(java_string); 436 int length = java_lang_String::length(java_string); 437 assert(start + len <= length, "just checking"); 438 jchar* position = value->char_at_addr(offset + start); 439 return UNICODE::as_utf8(position, len, buf, buflen); 440 } 441 442 bool java_lang_String::equals(oop java_string, jchar* chars, int len) { 443 assert(java_string->klass() == SystemDictionary::String_klass(), 444 "must be java_string"); 445 typeArrayOop value = java_lang_String::value(java_string); 446 int offset = java_lang_String::offset(java_string); 447 int length = java_lang_String::length(java_string); 448 if (length != len) { 449 return false; 450 } 451 for (int i = 0; i < len; i++) { 452 if (value->char_at(i + offset) != chars[i]) { 453 return false; 454 } 455 } 456 return true; 457 } 458 459 bool java_lang_String::equals(oop str1, oop str2) { 460 assert(str1->klass() == SystemDictionary::String_klass(), 461 "must be java String"); 462 assert(str2->klass() == SystemDictionary::String_klass(), 463 "must be java String"); 464 typeArrayOop value1 = java_lang_String::value(str1); 465 int offset1 = java_lang_String::offset(str1); 466 int length1 = java_lang_String::length(str1); 467 typeArrayOop value2 = java_lang_String::value(str2); 468 int offset2 = java_lang_String::offset(str2); 469 int length2 = java_lang_String::length(str2); 470 471 if (length1 != length2) { 472 return false; 473 } 474 for (int i = 0; i < length1; i++) { 475 if (value1->char_at(i + offset1) != value2->char_at(i + offset2)) { 476 return false; 477 } 478 } 479 return true; 480 } 481 482 void java_lang_String::print(oop java_string, outputStream* st) { 483 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string"); 484 typeArrayOop value = java_lang_String::value(java_string); 485 486 if (value == NULL) { 487 // This can happen if, e.g., printing a String 488 // object before its initializer has been called 489 st->print("NULL"); 490 return; 491 } 492 493 int offset = java_lang_String::offset(java_string); 494 int length = java_lang_String::length(java_string); 495 496 st->print("\""); 497 for (int index = 0; index < length; index++) { 498 st->print("%c", value->char_at(index + offset)); 499 } 500 st->print("\""); 501 } 502 503 504 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 505 assert(mirror.not_null() && fd->is_static(), "just checking"); 506 if (fd->has_initial_value()) { 507 BasicType t = fd->field_type(); 508 switch (t) { 509 case T_BYTE: 510 mirror()->byte_field_put(fd->offset(), fd->int_initial_value()); 511 break; 512 case T_BOOLEAN: 513 mirror()->bool_field_put(fd->offset(), fd->int_initial_value()); 514 break; 515 case T_CHAR: 516 mirror()->char_field_put(fd->offset(), fd->int_initial_value()); 517 break; 518 case T_SHORT: 519 mirror()->short_field_put(fd->offset(), fd->int_initial_value()); 520 break; 521 case T_INT: 522 mirror()->int_field_put(fd->offset(), fd->int_initial_value()); 523 break; 524 case T_FLOAT: 525 mirror()->float_field_put(fd->offset(), fd->float_initial_value()); 526 break; 527 case T_DOUBLE: 528 mirror()->double_field_put(fd->offset(), fd->double_initial_value()); 529 break; 530 case T_LONG: 531 mirror()->long_field_put(fd->offset(), fd->long_initial_value()); 532 break; 533 case T_OBJECT: 534 { 535 #ifdef ASSERT 536 TempNewSymbol sym = SymbolTable::new_symbol("Ljava/lang/String;", CHECK); 537 assert(fd->signature() == sym, "just checking"); 538 #endif 539 oop string = fd->string_initial_value(CHECK); 540 mirror()->obj_field_put(fd->offset(), string); 541 } 542 break; 543 default: 544 THROW_MSG(vmSymbols::java_lang_ClassFormatError(), 545 "Illegal ConstantValue attribute in class file"); 546 } 547 } 548 } 549 550 551 void java_lang_Class::fixup_mirror(KlassHandle k, TRAPS) { 552 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already"); 553 554 // If the offset was read from the shared archive, it was fixed up already 555 if (!k->is_shared()) { 556 if (k->oop_is_instance()) { 557 // During bootstrap, java.lang.Class wasn't loaded so static field 558 // offsets were computed without the size added it. Go back and 559 // update all the static field offsets to included the size. 560 for (JavaFieldStream fs(InstanceKlass::cast(k())); !fs.done(); fs.next()) { 561 if (fs.access_flags().is_static()) { 562 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields(); 563 fs.set_offset(real_offset); 564 } 565 } 566 } 567 } 568 create_mirror(k, Handle(NULL), Handle(NULL), CHECK); 569 } 570 571 void java_lang_Class::initialize_mirror_fields(KlassHandle k, 572 Handle mirror, 573 Handle protection_domain, 574 TRAPS) { 575 // Allocate a simple java object for a lock. 576 // This needs to be a java object because during class initialization 577 // it can be held across a java call. 578 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK); 579 set_init_lock(mirror(), r); 580 581 // Set protection domain also 582 set_protection_domain(mirror(), protection_domain()); 583 584 // Initialize static fields 585 InstanceKlass::cast(k())->do_local_static_fields(&initialize_static_field, mirror, CHECK); 586 } 587 588 void java_lang_Class::create_mirror(KlassHandle k, Handle class_loader, 589 Handle protection_domain, TRAPS) { 590 assert(k->java_mirror() == NULL, "should only assign mirror once"); 591 // Use this moment of initialization to cache modifier_flags also, 592 // to support Class.getModifiers(). Instance classes recalculate 593 // the cached flags after the class file is parsed, but before the 594 // class is put into the system dictionary. 595 int computed_modifiers = k->compute_modifier_flags(CHECK); 596 k->set_modifier_flags(computed_modifiers); 597 // Class_klass has to be loaded because it is used to allocate 598 // the mirror. 599 if (SystemDictionary::Class_klass_loaded()) { 600 // Allocate mirror (java.lang.Class instance) 601 Handle mirror = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK); 602 603 // Setup indirection from mirror->klass 604 if (!k.is_null()) { 605 java_lang_Class::set_klass(mirror(), k()); 606 } 607 608 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass()); 609 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set"); 610 611 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror())); 612 613 // It might also have a component mirror. This mirror must already exist. 614 if (k->oop_is_array()) { 615 Handle comp_mirror; 616 if (k->oop_is_typeArray()) { 617 BasicType type = TypeArrayKlass::cast(k())->element_type(); 618 comp_mirror = Universe::java_mirror(type); 619 } else { 620 assert(k->oop_is_objArray(), "Must be"); 621 Klass* element_klass = ObjArrayKlass::cast(k())->element_klass(); 622 assert(element_klass != NULL, "Must have an element klass"); 623 comp_mirror = element_klass->java_mirror(); 624 } 625 assert(comp_mirror.not_null(), "must have a mirror"); 626 627 // Two-way link between the array klass and its component mirror: 628 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k 629 set_component_mirror(mirror(), comp_mirror()); 630 set_array_klass(comp_mirror(), k()); 631 } else { 632 assert(k->oop_is_instance(), "Must be"); 633 634 initialize_mirror_fields(k, mirror, protection_domain, THREAD); 635 if (HAS_PENDING_EXCEPTION) { 636 // If any of the fields throws an exception like OOM remove the klass field 637 // from the mirror so GC doesn't follow it after the klass has been deallocated. 638 // This mirror looks like a primitive type, which logically it is because it 639 // it represents no class. 640 java_lang_Class::set_klass(mirror(), NULL); 641 return; 642 } 643 } 644 645 // set the classLoader field in the java_lang_Class instance 646 assert(class_loader() == k->class_loader(), "should be same"); 647 set_class_loader(mirror(), class_loader()); 648 649 // Setup indirection from klass->mirror last 650 // after any exceptions can happen during allocations. 651 if (!k.is_null()) { 652 k->set_java_mirror(mirror()); 653 } 654 } else { 655 if (fixup_mirror_list() == NULL) { 656 GrowableArray<Klass*>* list = 657 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true); 658 set_fixup_mirror_list(list); 659 } 660 fixup_mirror_list()->push(k()); 661 } 662 } 663 664 665 int java_lang_Class::oop_size(oop java_class) { 666 assert(_oop_size_offset != 0, "must be set"); 667 return java_class->int_field(_oop_size_offset); 668 } 669 void java_lang_Class::set_oop_size(oop java_class, int size) { 670 assert(_oop_size_offset != 0, "must be set"); 671 java_class->int_field_put(_oop_size_offset, size); 672 } 673 int java_lang_Class::static_oop_field_count(oop java_class) { 674 assert(_static_oop_field_count_offset != 0, "must be set"); 675 return java_class->int_field(_static_oop_field_count_offset); 676 } 677 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) { 678 assert(_static_oop_field_count_offset != 0, "must be set"); 679 java_class->int_field_put(_static_oop_field_count_offset, size); 680 } 681 682 oop java_lang_Class::protection_domain(oop java_class) { 683 assert(_protection_domain_offset != 0, "must be set"); 684 return java_class->obj_field(_protection_domain_offset); 685 } 686 void java_lang_Class::set_protection_domain(oop java_class, oop pd) { 687 assert(_protection_domain_offset != 0, "must be set"); 688 java_class->obj_field_put(_protection_domain_offset, pd); 689 } 690 691 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) { 692 assert(_component_mirror_offset != 0, "must be set"); 693 java_class->obj_field_put(_component_mirror_offset, comp_mirror); 694 } 695 oop java_lang_Class::component_mirror(oop java_class) { 696 assert(_component_mirror_offset != 0, "must be set"); 697 return java_class->obj_field(_component_mirror_offset); 698 } 699 700 oop java_lang_Class::init_lock(oop java_class) { 701 assert(_init_lock_offset != 0, "must be set"); 702 return java_class->obj_field(_init_lock_offset); 703 } 704 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) { 705 assert(_init_lock_offset != 0, "must be set"); 706 java_class->obj_field_put(_init_lock_offset, init_lock); 707 } 708 709 objArrayOop java_lang_Class::signers(oop java_class) { 710 assert(_signers_offset != 0, "must be set"); 711 return (objArrayOop)java_class->obj_field(_signers_offset); 712 } 713 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) { 714 assert(_signers_offset != 0, "must be set"); 715 java_class->obj_field_put(_signers_offset, (oop)signers); 716 } 717 718 719 void java_lang_Class::set_class_loader(oop java_class, oop loader) { 720 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet. 721 if (_class_loader_offset != 0) { 722 java_class->obj_field_put(_class_loader_offset, loader); 723 } 724 } 725 726 oop java_lang_Class::class_loader(oop java_class) { 727 assert(_class_loader_offset != 0, "must be set"); 728 return java_class->obj_field(_class_loader_offset); 729 } 730 731 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) { 732 // This should be improved by adding a field at the Java level or by 733 // introducing a new VM klass (see comment in ClassFileParser) 734 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0); 735 if (type != T_VOID) { 736 Klass* aklass = Universe::typeArrayKlassObj(type); 737 assert(aklass != NULL, "correct bootstrap"); 738 set_array_klass(java_class, aklass); 739 } 740 #ifdef ASSERT 741 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass()); 742 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation"); 743 #endif 744 return java_class; 745 } 746 747 748 Klass* java_lang_Class::as_Klass(oop java_class) { 749 //%note memory_2 750 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 751 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset)); 752 assert(k == NULL || k->is_klass(), "type check"); 753 return k; 754 } 755 756 757 void java_lang_Class::set_klass(oop java_class, Klass* klass) { 758 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 759 java_class->metadata_field_put(_klass_offset, klass); 760 } 761 762 763 void java_lang_Class::print_signature(oop java_class, outputStream* st) { 764 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 765 Symbol* name = NULL; 766 bool is_instance = false; 767 if (is_primitive(java_class)) { 768 name = vmSymbols::type_signature(primitive_type(java_class)); 769 } else { 770 Klass* k = as_Klass(java_class); 771 is_instance = k->oop_is_instance(); 772 name = k->name(); 773 } 774 if (name == NULL) { 775 st->print("<null>"); 776 return; 777 } 778 if (is_instance) st->print("L"); 779 st->write((char*) name->base(), (int) name->utf8_length()); 780 if (is_instance) st->print(";"); 781 } 782 783 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) { 784 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 785 Symbol* name; 786 if (is_primitive(java_class)) { 787 name = vmSymbols::type_signature(primitive_type(java_class)); 788 // Because this can create a new symbol, the caller has to decrement 789 // the refcount, so make adjustment here and below for symbols returned 790 // that are not created or incremented due to a successful lookup. 791 name->increment_refcount(); 792 } else { 793 Klass* k = as_Klass(java_class); 794 if (!k->oop_is_instance()) { 795 name = k->name(); 796 name->increment_refcount(); 797 } else { 798 ResourceMark rm; 799 const char* sigstr = k->signature_name(); 800 int siglen = (int) strlen(sigstr); 801 if (!intern_if_not_found) { 802 name = SymbolTable::probe(sigstr, siglen); 803 } else { 804 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 805 } 806 } 807 } 808 return name; 809 } 810 811 // Returns the Java name for this Java mirror (Resource allocated) 812 // See Klass::external_name(). 813 // For primitive type Java mirrors, its type name is returned. 814 const char* java_lang_Class::as_external_name(oop java_class) { 815 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 816 const char* name = NULL; 817 if (is_primitive(java_class)) { 818 name = type2name(primitive_type(java_class)); 819 } else { 820 name = as_Klass(java_class)->external_name(); 821 } 822 if (name == NULL) { 823 name = "<null>"; 824 } 825 return name; 826 } 827 828 Klass* java_lang_Class::array_klass(oop java_class) { 829 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset)); 830 assert(k == NULL || k->is_klass() && k->oop_is_array(), "should be array klass"); 831 return k; 832 } 833 834 835 void java_lang_Class::set_array_klass(oop java_class, Klass* klass) { 836 assert(klass->is_klass() && klass->oop_is_array(), "should be array klass"); 837 java_class->metadata_field_put(_array_klass_offset, klass); 838 } 839 840 841 bool java_lang_Class::is_primitive(oop java_class) { 842 // should assert: 843 //assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 844 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL); 845 846 #ifdef ASSERT 847 if (is_primitive) { 848 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset)); 849 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()), 850 "Should be either the T_VOID primitive or a java primitive"); 851 } 852 #endif 853 854 return is_primitive; 855 } 856 857 858 BasicType java_lang_Class::primitive_type(oop java_class) { 859 assert(java_lang_Class::is_primitive(java_class), "just checking"); 860 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset)); 861 BasicType type = T_VOID; 862 if (ak != NULL) { 863 // Note: create_basic_type_mirror above initializes ak to a non-null value. 864 type = ArrayKlass::cast(ak)->element_type(); 865 } else { 866 assert(java_class == Universe::void_mirror(), "only valid non-array primitive"); 867 } 868 assert(Universe::java_mirror(type) == java_class, "must be consistent"); 869 return type; 870 } 871 872 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) { 873 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 874 if (is_primitive(java_class)) { 875 if (reference_klass != NULL) 876 (*reference_klass) = NULL; 877 return primitive_type(java_class); 878 } else { 879 if (reference_klass != NULL) 880 (*reference_klass) = as_Klass(java_class); 881 return T_OBJECT; 882 } 883 } 884 885 886 oop java_lang_Class::primitive_mirror(BasicType t) { 887 oop mirror = Universe::java_mirror(t); 888 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class"); 889 assert(java_lang_Class::is_primitive(mirror), "must be primitive"); 890 return mirror; 891 } 892 893 bool java_lang_Class::offsets_computed = false; 894 int java_lang_Class::classRedefinedCount_offset = -1; 895 896 void java_lang_Class::compute_offsets() { 897 assert(!offsets_computed, "offsets should be initialized only once"); 898 offsets_computed = true; 899 900 Klass* k = SystemDictionary::Class_klass(); 901 // The classRedefinedCount field is only present starting in 1.5, 902 // so don't go fatal. 903 compute_optional_offset(classRedefinedCount_offset, 904 k, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature()); 905 906 // Needs to be optional because the old build runs Queens during bootstrapping 907 // and jdk8-9 doesn't have coordinated pushes yet. 908 compute_optional_offset(_class_loader_offset, 909 k, vmSymbols::classLoader_name(), 910 vmSymbols::classloader_signature()); 911 912 compute_offset(_component_mirror_offset, 913 k, vmSymbols::componentType_name(), 914 vmSymbols::class_signature()); 915 916 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have 917 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops 918 // GC treats them the same. 919 _init_lock_offset = _component_mirror_offset; 920 921 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 922 } 923 924 int java_lang_Class::classRedefinedCount(oop the_class_mirror) { 925 if (classRedefinedCount_offset == -1) { 926 // If we don't have an offset for it then just return -1 as a marker. 927 return -1; 928 } 929 930 return the_class_mirror->int_field(classRedefinedCount_offset); 931 } 932 933 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) { 934 if (classRedefinedCount_offset == -1) { 935 // If we don't have an offset for it then nothing to set. 936 return; 937 } 938 939 the_class_mirror->int_field_put(classRedefinedCount_offset, value); 940 } 941 942 943 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the 944 // platform thread structure, and a eetop offset which was used for thread 945 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures 946 // merged, so in the HotSpot VM we just use the eetop field for the thread 947 // instead of the privateInfo_offset. 948 // 949 // Note: The stackSize field is only present starting in 1.4. 950 951 int java_lang_Thread::_name_offset = 0; 952 int java_lang_Thread::_group_offset = 0; 953 int java_lang_Thread::_contextClassLoader_offset = 0; 954 int java_lang_Thread::_inheritedAccessControlContext_offset = 0; 955 int java_lang_Thread::_priority_offset = 0; 956 int java_lang_Thread::_eetop_offset = 0; 957 int java_lang_Thread::_daemon_offset = 0; 958 int java_lang_Thread::_stillborn_offset = 0; 959 int java_lang_Thread::_stackSize_offset = 0; 960 int java_lang_Thread::_tid_offset = 0; 961 int java_lang_Thread::_thread_status_offset = 0; 962 int java_lang_Thread::_park_blocker_offset = 0; 963 int java_lang_Thread::_park_event_offset = 0 ; 964 965 966 void java_lang_Thread::compute_offsets() { 967 assert(_group_offset == 0, "offsets should be initialized only once"); 968 969 Klass* k = SystemDictionary::Thread_klass(); 970 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 971 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature()); 972 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature()); 973 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature()); 974 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature()); 975 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature()); 976 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature()); 977 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature()); 978 // The stackSize field is only present starting in 1.4, so don't go fatal. 979 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature()); 980 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal. 981 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature()); 982 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature()); 983 // The parkBlocker field is only present starting in 1.6, so don't go fatal. 984 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature()); 985 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(), 986 vmSymbols::long_signature()); 987 } 988 989 990 JavaThread* java_lang_Thread::thread(oop java_thread) { 991 return (JavaThread*)java_thread->address_field(_eetop_offset); 992 } 993 994 995 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) { 996 java_thread->address_field_put(_eetop_offset, (address)thread); 997 } 998 999 1000 oop java_lang_Thread::name(oop java_thread) { 1001 return java_thread->obj_field(_name_offset); 1002 } 1003 1004 1005 void java_lang_Thread::set_name(oop java_thread, oop name) { 1006 java_thread->obj_field_put(_name_offset, name); 1007 } 1008 1009 1010 ThreadPriority java_lang_Thread::priority(oop java_thread) { 1011 return (ThreadPriority)java_thread->int_field(_priority_offset); 1012 } 1013 1014 1015 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) { 1016 java_thread->int_field_put(_priority_offset, priority); 1017 } 1018 1019 1020 oop java_lang_Thread::threadGroup(oop java_thread) { 1021 return java_thread->obj_field(_group_offset); 1022 } 1023 1024 1025 bool java_lang_Thread::is_stillborn(oop java_thread) { 1026 return java_thread->bool_field(_stillborn_offset) != 0; 1027 } 1028 1029 1030 // We never have reason to turn the stillborn bit off 1031 void java_lang_Thread::set_stillborn(oop java_thread) { 1032 java_thread->bool_field_put(_stillborn_offset, true); 1033 } 1034 1035 1036 bool java_lang_Thread::is_alive(oop java_thread) { 1037 JavaThread* thr = java_lang_Thread::thread(java_thread); 1038 return (thr != NULL); 1039 } 1040 1041 1042 bool java_lang_Thread::is_daemon(oop java_thread) { 1043 return java_thread->bool_field(_daemon_offset) != 0; 1044 } 1045 1046 1047 void java_lang_Thread::set_daemon(oop java_thread) { 1048 java_thread->bool_field_put(_daemon_offset, true); 1049 } 1050 1051 oop java_lang_Thread::context_class_loader(oop java_thread) { 1052 return java_thread->obj_field(_contextClassLoader_offset); 1053 } 1054 1055 oop java_lang_Thread::inherited_access_control_context(oop java_thread) { 1056 return java_thread->obj_field(_inheritedAccessControlContext_offset); 1057 } 1058 1059 1060 jlong java_lang_Thread::stackSize(oop java_thread) { 1061 if (_stackSize_offset > 0) { 1062 return java_thread->long_field(_stackSize_offset); 1063 } else { 1064 return 0; 1065 } 1066 } 1067 1068 // Write the thread status value to threadStatus field in java.lang.Thread java class. 1069 void java_lang_Thread::set_thread_status(oop java_thread, 1070 java_lang_Thread::ThreadStatus status) { 1071 // The threadStatus is only present starting in 1.5 1072 if (_thread_status_offset > 0) { 1073 java_thread->int_field_put(_thread_status_offset, status); 1074 } 1075 } 1076 1077 // Read thread status value from threadStatus field in java.lang.Thread java class. 1078 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) { 1079 assert(Thread::current()->is_Watcher_thread() || Thread::current()->is_VM_thread() || 1080 JavaThread::current()->thread_state() == _thread_in_vm, 1081 "Java Thread is not running in vm"); 1082 // The threadStatus is only present starting in 1.5 1083 if (_thread_status_offset > 0) { 1084 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1085 } else { 1086 // All we can easily figure out is if it is alive, but that is 1087 // enough info for a valid unknown status. 1088 // These aren't restricted to valid set ThreadStatus values, so 1089 // use JVMTI values and cast. 1090 JavaThread* thr = java_lang_Thread::thread(java_thread); 1091 if (thr == NULL) { 1092 // the thread hasn't run yet or is in the process of exiting 1093 return NEW; 1094 } 1095 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE; 1096 } 1097 } 1098 1099 1100 jlong java_lang_Thread::thread_id(oop java_thread) { 1101 // The thread ID field is only present starting in 1.5 1102 if (_tid_offset > 0) { 1103 return java_thread->long_field(_tid_offset); 1104 } else { 1105 return 0; 1106 } 1107 } 1108 1109 oop java_lang_Thread::park_blocker(oop java_thread) { 1110 assert(JDK_Version::current().supports_thread_park_blocker() && 1111 _park_blocker_offset != 0, "Must support parkBlocker field"); 1112 1113 if (_park_blocker_offset > 0) { 1114 return java_thread->obj_field(_park_blocker_offset); 1115 } 1116 1117 return NULL; 1118 } 1119 1120 jlong java_lang_Thread::park_event(oop java_thread) { 1121 if (_park_event_offset > 0) { 1122 return java_thread->long_field(_park_event_offset); 1123 } 1124 return 0; 1125 } 1126 1127 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) { 1128 if (_park_event_offset > 0) { 1129 java_thread->long_field_put(_park_event_offset, ptr); 1130 return true; 1131 } 1132 return false; 1133 } 1134 1135 1136 const char* java_lang_Thread::thread_status_name(oop java_thread) { 1137 assert(_thread_status_offset != 0, "Must have thread status"); 1138 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1139 switch (status) { 1140 case NEW : return "NEW"; 1141 case RUNNABLE : return "RUNNABLE"; 1142 case SLEEPING : return "TIMED_WAITING (sleeping)"; 1143 case IN_OBJECT_WAIT : return "WAITING (on object monitor)"; 1144 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)"; 1145 case PARKED : return "WAITING (parking)"; 1146 case PARKED_TIMED : return "TIMED_WAITING (parking)"; 1147 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)"; 1148 case TERMINATED : return "TERMINATED"; 1149 default : return "UNKNOWN"; 1150 }; 1151 } 1152 int java_lang_ThreadGroup::_parent_offset = 0; 1153 int java_lang_ThreadGroup::_name_offset = 0; 1154 int java_lang_ThreadGroup::_threads_offset = 0; 1155 int java_lang_ThreadGroup::_groups_offset = 0; 1156 int java_lang_ThreadGroup::_maxPriority_offset = 0; 1157 int java_lang_ThreadGroup::_destroyed_offset = 0; 1158 int java_lang_ThreadGroup::_daemon_offset = 0; 1159 int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0; 1160 int java_lang_ThreadGroup::_nthreads_offset = 0; 1161 int java_lang_ThreadGroup::_ngroups_offset = 0; 1162 1163 oop java_lang_ThreadGroup::parent(oop java_thread_group) { 1164 assert(java_thread_group->is_oop(), "thread group must be oop"); 1165 return java_thread_group->obj_field(_parent_offset); 1166 } 1167 1168 // ("name as oop" accessor is not necessary) 1169 1170 typeArrayOop java_lang_ThreadGroup::name(oop java_thread_group) { 1171 oop name = java_thread_group->obj_field(_name_offset); 1172 // ThreadGroup.name can be null 1173 return name == NULL ? (typeArrayOop)NULL : java_lang_String::value(name); 1174 } 1175 1176 int java_lang_ThreadGroup::nthreads(oop java_thread_group) { 1177 assert(java_thread_group->is_oop(), "thread group must be oop"); 1178 return java_thread_group->int_field(_nthreads_offset); 1179 } 1180 1181 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) { 1182 oop threads = java_thread_group->obj_field(_threads_offset); 1183 assert(threads != NULL, "threadgroups should have threads"); 1184 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code 1185 return objArrayOop(threads); 1186 } 1187 1188 int java_lang_ThreadGroup::ngroups(oop java_thread_group) { 1189 assert(java_thread_group->is_oop(), "thread group must be oop"); 1190 return java_thread_group->int_field(_ngroups_offset); 1191 } 1192 1193 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) { 1194 oop groups = java_thread_group->obj_field(_groups_offset); 1195 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code 1196 return objArrayOop(groups); 1197 } 1198 1199 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) { 1200 assert(java_thread_group->is_oop(), "thread group must be oop"); 1201 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset); 1202 } 1203 1204 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) { 1205 assert(java_thread_group->is_oop(), "thread group must be oop"); 1206 return java_thread_group->bool_field(_destroyed_offset) != 0; 1207 } 1208 1209 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) { 1210 assert(java_thread_group->is_oop(), "thread group must be oop"); 1211 return java_thread_group->bool_field(_daemon_offset) != 0; 1212 } 1213 1214 bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) { 1215 assert(java_thread_group->is_oop(), "thread group must be oop"); 1216 return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0; 1217 } 1218 1219 void java_lang_ThreadGroup::compute_offsets() { 1220 assert(_parent_offset == 0, "offsets should be initialized only once"); 1221 1222 Klass* k = SystemDictionary::ThreadGroup_klass(); 1223 1224 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature()); 1225 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1226 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature()); 1227 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature()); 1228 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature()); 1229 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature()); 1230 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature()); 1231 compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature()); 1232 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature()); 1233 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature()); 1234 } 1235 1236 oop java_lang_Throwable::unassigned_stacktrace() { 1237 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Throwable_klass()); 1238 address addr = ik->static_field_addr(static_unassigned_stacktrace_offset); 1239 if (UseCompressedOops) { 1240 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 1241 } else { 1242 return oopDesc::load_decode_heap_oop((oop*)addr); 1243 } 1244 } 1245 1246 oop java_lang_Throwable::backtrace(oop throwable) { 1247 return throwable->obj_field_acquire(backtrace_offset); 1248 } 1249 1250 1251 void java_lang_Throwable::set_backtrace(oop throwable, oop value) { 1252 throwable->release_obj_field_put(backtrace_offset, value); 1253 } 1254 1255 1256 oop java_lang_Throwable::message(oop throwable) { 1257 return throwable->obj_field(detailMessage_offset); 1258 } 1259 1260 1261 oop java_lang_Throwable::message(Handle throwable) { 1262 return throwable->obj_field(detailMessage_offset); 1263 } 1264 1265 1266 // Return Symbol for detailed_message or NULL 1267 Symbol* java_lang_Throwable::detail_message(oop throwable) { 1268 PRESERVE_EXCEPTION_MARK; // Keep original exception 1269 oop detailed_message = java_lang_Throwable::message(throwable); 1270 if (detailed_message != NULL) { 1271 return java_lang_String::as_symbol(detailed_message, THREAD); 1272 } 1273 return NULL; 1274 } 1275 1276 void java_lang_Throwable::set_message(oop throwable, oop value) { 1277 throwable->obj_field_put(detailMessage_offset, value); 1278 } 1279 1280 1281 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) { 1282 throwable->obj_field_put(stackTrace_offset, st_element_array); 1283 } 1284 1285 void java_lang_Throwable::clear_stacktrace(oop throwable) { 1286 set_stacktrace(throwable, NULL); 1287 } 1288 1289 1290 void java_lang_Throwable::print(oop throwable, outputStream* st) { 1291 ResourceMark rm; 1292 Klass* k = throwable->klass(); 1293 assert(k != NULL, "just checking"); 1294 st->print("%s", InstanceKlass::cast(k)->external_name()); 1295 oop msg = message(throwable); 1296 if (msg != NULL) { 1297 st->print(": %s", java_lang_String::as_utf8_string(msg)); 1298 } 1299 } 1300 1301 1302 void java_lang_Throwable::print(Handle throwable, outputStream* st) { 1303 ResourceMark rm; 1304 Klass* k = throwable->klass(); 1305 assert(k != NULL, "just checking"); 1306 st->print("%s", InstanceKlass::cast(k)->external_name()); 1307 oop msg = message(throwable); 1308 if (msg != NULL) { 1309 st->print(": %s", java_lang_String::as_utf8_string(msg)); 1310 } 1311 } 1312 1313 // After this many redefines, the stack trace is unreliable. 1314 const int MAX_VERSION = USHRT_MAX; 1315 1316 // Helper backtrace functions to store bci|version together. 1317 static inline int merge_bci_and_version(int bci, int version) { 1318 // only store u2 for version, checking for overflow. 1319 if (version > USHRT_MAX || version < 0) version = MAX_VERSION; 1320 assert((jushort)bci == bci, "bci should be short"); 1321 return build_int_from_shorts(version, bci); 1322 } 1323 1324 static inline int bci_at(unsigned int merged) { 1325 return extract_high_short_from_int(merged); 1326 } 1327 static inline int version_at(unsigned int merged) { 1328 return extract_low_short_from_int(merged); 1329 } 1330 1331 static inline bool version_matches(Method* method, int version) { 1332 assert(version < MAX_VERSION, "version is too big"); 1333 return method != NULL && (method->constants()->version() == version); 1334 } 1335 1336 static inline int get_line_number(Method* method, int bci) { 1337 int line_number = 0; 1338 if (method->is_native()) { 1339 // Negative value different from -1 below, enabling Java code in 1340 // class java.lang.StackTraceElement to distinguish "native" from 1341 // "no LineNumberTable". JDK tests for -2. 1342 line_number = -2; 1343 } else { 1344 // Returns -1 if no LineNumberTable, and otherwise actual line number 1345 line_number = method->line_number_from_bci(bci); 1346 if (line_number == -1 && ShowHiddenFrames) { 1347 line_number = bci + 1000000; 1348 } 1349 } 1350 return line_number; 1351 } 1352 1353 // This class provides a simple wrapper over the internal structure of 1354 // exception backtrace to insulate users of the backtrace from needing 1355 // to know what it looks like. 1356 class BacktraceBuilder: public StackObj { 1357 private: 1358 Handle _backtrace; 1359 objArrayOop _head; 1360 typeArrayOop _methods; 1361 typeArrayOop _bcis; 1362 objArrayOop _mirrors; 1363 typeArrayOop _cprefs; // needed to insulate method name against redefinition 1364 int _index; 1365 No_Safepoint_Verifier _nsv; 1366 1367 public: 1368 1369 enum { 1370 trace_methods_offset = java_lang_Throwable::trace_methods_offset, 1371 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset, 1372 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset, 1373 trace_cprefs_offset = java_lang_Throwable::trace_cprefs_offset, 1374 trace_next_offset = java_lang_Throwable::trace_next_offset, 1375 trace_size = java_lang_Throwable::trace_size, 1376 trace_chunk_size = java_lang_Throwable::trace_chunk_size 1377 }; 1378 1379 // get info out of chunks 1380 static typeArrayOop get_methods(objArrayHandle chunk) { 1381 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset)); 1382 assert(methods != NULL, "method array should be initialized in backtrace"); 1383 return methods; 1384 } 1385 static typeArrayOop get_bcis(objArrayHandle chunk) { 1386 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 1387 assert(bcis != NULL, "bci array should be initialized in backtrace"); 1388 return bcis; 1389 } 1390 static objArrayOop get_mirrors(objArrayHandle chunk) { 1391 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset)); 1392 assert(mirrors != NULL, "mirror array should be initialized in backtrace"); 1393 return mirrors; 1394 } 1395 static typeArrayOop get_cprefs(objArrayHandle chunk) { 1396 typeArrayOop cprefs = typeArrayOop(chunk->obj_at(trace_cprefs_offset)); 1397 assert(cprefs != NULL, "cprefs array should be initialized in backtrace"); 1398 return cprefs; 1399 } 1400 1401 // constructor for new backtrace 1402 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL), _cprefs(NULL) { 1403 expand(CHECK); 1404 _backtrace = _head; 1405 _index = 0; 1406 } 1407 1408 BacktraceBuilder(objArrayHandle backtrace) { 1409 _methods = get_methods(backtrace); 1410 _bcis = get_bcis(backtrace); 1411 _mirrors = get_mirrors(backtrace); 1412 _cprefs = get_cprefs(backtrace); 1413 assert(_methods->length() == _bcis->length() && 1414 _methods->length() == _mirrors->length(), 1415 "method and source information arrays should match"); 1416 1417 // head is the preallocated backtrace 1418 _backtrace = _head = backtrace(); 1419 _index = 0; 1420 } 1421 1422 void expand(TRAPS) { 1423 objArrayHandle old_head(THREAD, _head); 1424 Pause_No_Safepoint_Verifier pnsv(&_nsv); 1425 1426 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK); 1427 objArrayHandle new_head(THREAD, head); 1428 1429 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK); 1430 typeArrayHandle new_methods(THREAD, methods); 1431 1432 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK); 1433 typeArrayHandle new_bcis(THREAD, bcis); 1434 1435 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK); 1436 objArrayHandle new_mirrors(THREAD, mirrors); 1437 1438 typeArrayOop cprefs = oopFactory::new_shortArray(trace_chunk_size, CHECK); 1439 typeArrayHandle new_cprefs(THREAD, cprefs); 1440 1441 if (!old_head.is_null()) { 1442 old_head->obj_at_put(trace_next_offset, new_head()); 1443 } 1444 new_head->obj_at_put(trace_methods_offset, new_methods()); 1445 new_head->obj_at_put(trace_bcis_offset, new_bcis()); 1446 new_head->obj_at_put(trace_mirrors_offset, new_mirrors()); 1447 new_head->obj_at_put(trace_cprefs_offset, new_cprefs()); 1448 1449 _head = new_head(); 1450 _methods = new_methods(); 1451 _bcis = new_bcis(); 1452 _mirrors = new_mirrors(); 1453 _cprefs = new_cprefs(); 1454 _index = 0; 1455 } 1456 1457 oop backtrace() { 1458 return _backtrace(); 1459 } 1460 1461 inline void push(Method* method, int bci, TRAPS) { 1462 // Smear the -1 bci to 0 since the array only holds unsigned 1463 // shorts. The later line number lookup would just smear the -1 1464 // to a 0 even if it could be recorded. 1465 if (bci == SynchronizationEntryBCI) bci = 0; 1466 1467 if (_index >= trace_chunk_size) { 1468 methodHandle mhandle(THREAD, method); 1469 expand(CHECK); 1470 method = mhandle(); 1471 } 1472 1473 _methods->short_at_put(_index, method->orig_method_idnum()); 1474 _bcis->int_at_put(_index, merge_bci_and_version(bci, method->constants()->version())); 1475 _cprefs->short_at_put(_index, method->name_index()); 1476 1477 // We need to save the mirrors in the backtrace to keep the class 1478 // from being unloaded while we still have this stack trace. 1479 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror"); 1480 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror()); 1481 _index++; 1482 } 1483 1484 }; 1485 1486 Symbol* get_source_file_name(InstanceKlass* holder, int version) { 1487 // Find the specific ik version that contains this source_file_name_index 1488 // via the previous versions list, but use the current version's 1489 // constant pool to look it up. The previous version's index has been 1490 // merged for the current constant pool. 1491 InstanceKlass* ik = holder->get_klass_version(version); 1492 // This version has been cleaned up. 1493 if (ik == NULL) return NULL; 1494 int source_file_name_index = ik->source_file_name_index(); 1495 return (source_file_name_index == 0) ? 1496 (Symbol*)NULL : holder->constants()->symbol_at(source_file_name_index); 1497 } 1498 1499 // Print stack trace element to resource allocated buffer 1500 char* java_lang_Throwable::print_stack_element_to_buffer(Handle mirror, 1501 int method_id, int version, int bci, int cpref) { 1502 1503 // Get strings and string lengths 1504 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 1505 const char* klass_name = holder->external_name(); 1506 int buf_len = (int)strlen(klass_name); 1507 1508 Method* method = holder->method_with_orig_idnum(method_id, version); 1509 1510 // The method can be NULL if the requested class version is gone 1511 Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref); 1512 char* method_name = sym->as_C_string(); 1513 buf_len += (int)strlen(method_name); 1514 1515 char* source_file_name = NULL; 1516 Symbol* source = get_source_file_name(holder, version); 1517 if (source != NULL) { 1518 source_file_name = source->as_C_string(); 1519 buf_len += (int)strlen(source_file_name); 1520 } 1521 1522 // Allocate temporary buffer with extra space for formatting and line number 1523 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64); 1524 1525 // Print stack trace line in buffer 1526 sprintf(buf, "\tat %s.%s", klass_name, method_name); 1527 1528 if (!version_matches(method, version)) { 1529 strcat(buf, "(Redefined)"); 1530 } else { 1531 int line_number = get_line_number(method, bci); 1532 if (line_number == -2) { 1533 strcat(buf, "(Native Method)"); 1534 } else { 1535 if (source_file_name != NULL && (line_number != -1)) { 1536 // Sourcename and linenumber 1537 sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number); 1538 } else if (source_file_name != NULL) { 1539 // Just sourcename 1540 sprintf(buf + (int)strlen(buf), "(%s)", source_file_name); 1541 } else { 1542 // Neither sourcename nor linenumber 1543 sprintf(buf + (int)strlen(buf), "(Unknown Source)"); 1544 } 1545 nmethod* nm = method->code(); 1546 if (WizardMode && nm != NULL) { 1547 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm); 1548 } 1549 } 1550 } 1551 1552 return buf; 1553 } 1554 1555 void java_lang_Throwable::print_stack_element(outputStream *st, Handle mirror, 1556 int method_id, int version, int bci, int cpref) { 1557 ResourceMark rm; 1558 char* buf = print_stack_element_to_buffer(mirror, method_id, version, bci, cpref); 1559 st->print_cr("%s", buf); 1560 } 1561 1562 void java_lang_Throwable::print_stack_element(outputStream *st, methodHandle method, int bci) { 1563 Handle mirror = method->method_holder()->java_mirror(); 1564 int method_id = method->orig_method_idnum(); 1565 int version = method->constants()->version(); 1566 int cpref = method->name_index(); 1567 print_stack_element(st, mirror, method_id, version, bci, cpref); 1568 } 1569 1570 const char* java_lang_Throwable::no_stack_trace_message() { 1571 return "\t<<no stack trace available>>"; 1572 } 1573 1574 1575 // Currently used only for exceptions occurring during startup 1576 void java_lang_Throwable::print_stack_trace(oop throwable, outputStream* st) { 1577 Thread *THREAD = Thread::current(); 1578 Handle h_throwable(THREAD, throwable); 1579 while (h_throwable.not_null()) { 1580 objArrayHandle result (THREAD, objArrayOop(backtrace(h_throwable()))); 1581 if (result.is_null()) { 1582 st->print_cr("%s", no_stack_trace_message()); 1583 return; 1584 } 1585 1586 while (result.not_null()) { 1587 1588 // Get method id, bci, version and mirror from chunk 1589 typeArrayHandle methods (THREAD, BacktraceBuilder::get_methods(result)); 1590 typeArrayHandle bcis (THREAD, BacktraceBuilder::get_bcis(result)); 1591 objArrayHandle mirrors (THREAD, BacktraceBuilder::get_mirrors(result)); 1592 typeArrayHandle cprefs (THREAD, BacktraceBuilder::get_cprefs(result)); 1593 1594 int length = methods()->length(); 1595 for (int index = 0; index < length; index++) { 1596 Handle mirror(THREAD, mirrors->obj_at(index)); 1597 // NULL mirror means end of stack trace 1598 if (mirror.is_null()) goto handle_cause; 1599 int method = methods->short_at(index); 1600 int version = version_at(bcis->int_at(index)); 1601 int bci = bci_at(bcis->int_at(index)); 1602 int cpref = cprefs->short_at(index); 1603 print_stack_element(st, mirror, method, version, bci, cpref); 1604 } 1605 result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset))); 1606 } 1607 handle_cause: 1608 { 1609 EXCEPTION_MARK; 1610 JavaValue cause(T_OBJECT); 1611 JavaCalls::call_virtual(&cause, 1612 h_throwable, 1613 KlassHandle(THREAD, h_throwable->klass()), 1614 vmSymbols::getCause_name(), 1615 vmSymbols::void_throwable_signature(), 1616 THREAD); 1617 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 1618 if (HAS_PENDING_EXCEPTION) { 1619 CLEAR_PENDING_EXCEPTION; 1620 h_throwable = Handle(); 1621 } else { 1622 h_throwable = Handle(THREAD, (oop) cause.get_jobject()); 1623 if (h_throwable.not_null()) { 1624 st->print("Caused by: "); 1625 print(h_throwable, st); 1626 st->cr(); 1627 } 1628 } 1629 } 1630 } 1631 } 1632 1633 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS) { 1634 if (!StackTraceInThrowable) return; 1635 ResourceMark rm(THREAD); 1636 1637 // Start out by clearing the backtrace for this object, in case the VM 1638 // runs out of memory while allocating the stack trace 1639 set_backtrace(throwable(), NULL); 1640 // Clear lazily constructed Java level stacktrace if refilling occurs 1641 // This is unnecessary in 1.7+ but harmless 1642 clear_stacktrace(throwable()); 1643 1644 int max_depth = MaxJavaStackTraceDepth; 1645 JavaThread* thread = (JavaThread*)THREAD; 1646 BacktraceBuilder bt(CHECK); 1647 1648 // If there is no Java frame just return the method that was being called 1649 // with bci 0 1650 if (!thread->has_last_Java_frame()) { 1651 if (max_depth >= 1 && method() != NULL) { 1652 bt.push(method(), 0, CHECK); 1653 set_backtrace(throwable(), bt.backtrace()); 1654 } 1655 return; 1656 } 1657 1658 // Instead of using vframe directly, this version of fill_in_stack_trace 1659 // basically handles everything by hand. This significantly improved the 1660 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows. 1661 // See bug 6333838 for more details. 1662 // The "ASSERT" here is to verify this method generates the exactly same stack 1663 // trace as utilizing vframe. 1664 #ifdef ASSERT 1665 vframeStream st(thread); 1666 methodHandle st_method(THREAD, st.method()); 1667 #endif 1668 int total_count = 0; 1669 RegisterMap map(thread, false); 1670 int decode_offset = 0; 1671 nmethod* nm = NULL; 1672 bool skip_fillInStackTrace_check = false; 1673 bool skip_throwableInit_check = false; 1674 bool skip_hidden = !ShowHiddenFrames; 1675 1676 for (frame fr = thread->last_frame(); max_depth != total_count;) { 1677 Method* method = NULL; 1678 int bci = 0; 1679 1680 // Compiled java method case. 1681 if (decode_offset != 0) { 1682 DebugInfoReadStream stream(nm, decode_offset); 1683 decode_offset = stream.read_int(); 1684 method = (Method*)nm->metadata_at(stream.read_int()); 1685 bci = stream.read_bci(); 1686 } else { 1687 if (fr.is_first_frame()) break; 1688 address pc = fr.pc(); 1689 if (fr.is_interpreted_frame()) { 1690 address bcp = fr.interpreter_frame_bcp(); 1691 method = fr.interpreter_frame_method(); 1692 bci = method->bci_from(bcp); 1693 fr = fr.sender(&map); 1694 } else { 1695 CodeBlob* cb = fr.cb(); 1696 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL 1697 // but non nmethod 1698 fr = fr.sender(&map); 1699 if (cb == NULL || !cb->is_nmethod()) { 1700 continue; 1701 } 1702 nm = (nmethod*)cb; 1703 if (nm->method()->is_native()) { 1704 method = nm->method(); 1705 bci = 0; 1706 } else { 1707 PcDesc* pd = nm->pc_desc_at(pc); 1708 decode_offset = pd->scope_decode_offset(); 1709 // if decode_offset is not equal to 0, it will execute the 1710 // "compiled java method case" at the beginning of the loop. 1711 continue; 1712 } 1713 } 1714 } 1715 #ifdef ASSERT 1716 assert(st_method() == method && st.bci() == bci, 1717 "Wrong stack trace"); 1718 st.next(); 1719 // vframeStream::method isn't GC-safe so store off a copy 1720 // of the Method* in case we GC. 1721 if (!st.at_end()) { 1722 st_method = st.method(); 1723 } 1724 #endif 1725 1726 // the format of the stacktrace will be: 1727 // - 1 or more fillInStackTrace frames for the exception class (skipped) 1728 // - 0 or more <init> methods for the exception class (skipped) 1729 // - rest of the stack 1730 1731 if (!skip_fillInStackTrace_check) { 1732 if (method->name() == vmSymbols::fillInStackTrace_name() && 1733 throwable->is_a(method->method_holder())) { 1734 continue; 1735 } 1736 else { 1737 skip_fillInStackTrace_check = true; // gone past them all 1738 } 1739 } 1740 if (!skip_throwableInit_check) { 1741 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering"); 1742 1743 // skip <init> methods of the exception class and superclasses 1744 // This is simlar to classic VM. 1745 if (method->name() == vmSymbols::object_initializer_name() && 1746 throwable->is_a(method->method_holder())) { 1747 continue; 1748 } else { 1749 // there are none or we've seen them all - either way stop checking 1750 skip_throwableInit_check = true; 1751 } 1752 } 1753 if (method->is_hidden()) { 1754 if (skip_hidden) continue; 1755 } 1756 bt.push(method, bci, CHECK); 1757 total_count++; 1758 } 1759 1760 // Put completed stack trace into throwable object 1761 set_backtrace(throwable(), bt.backtrace()); 1762 } 1763 1764 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method) { 1765 // No-op if stack trace is disabled 1766 if (!StackTraceInThrowable) { 1767 return; 1768 } 1769 1770 // Disable stack traces for some preallocated out of memory errors 1771 if (!Universe::should_fill_in_stack_trace(throwable)) { 1772 return; 1773 } 1774 1775 PRESERVE_EXCEPTION_MARK; 1776 1777 JavaThread* thread = JavaThread::active(); 1778 fill_in_stack_trace(throwable, method, thread); 1779 // ignore exceptions thrown during stack trace filling 1780 CLEAR_PENDING_EXCEPTION; 1781 } 1782 1783 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 1784 // Allocate stack trace - backtrace is created but not filled in 1785 1786 // No-op if stack trace is disabled 1787 if (!StackTraceInThrowable) return; 1788 BacktraceBuilder bt(CHECK); // creates a backtrace 1789 set_backtrace(throwable(), bt.backtrace()); 1790 } 1791 1792 1793 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 1794 // Fill in stack trace into preallocated backtrace (no GC) 1795 1796 // No-op if stack trace is disabled 1797 if (!StackTraceInThrowable) return; 1798 1799 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check"); 1800 1801 JavaThread* THREAD = JavaThread::current(); 1802 1803 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable())); 1804 assert(backtrace.not_null(), "backtrace should have been preallocated"); 1805 1806 ResourceMark rm(THREAD); 1807 vframeStream st(THREAD); 1808 1809 BacktraceBuilder bt(backtrace); 1810 1811 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 1812 // methods as preallocated errors aren't created by "java" code. 1813 1814 // fill in as much stack trace as possible 1815 typeArrayOop methods = BacktraceBuilder::get_methods(backtrace); 1816 int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth); 1817 int chunk_count = 0; 1818 1819 for (;!st.at_end(); st.next()) { 1820 bt.push(st.method(), st.bci(), CHECK); 1821 chunk_count++; 1822 1823 // Bail-out for deep stacks 1824 if (chunk_count >= max_chunks) break; 1825 } 1826 1827 // We support the Throwable immutability protocol defined for Java 7. 1828 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace()); 1829 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized"); 1830 } 1831 1832 1833 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) { 1834 if (throwable == NULL) { 1835 THROW_0(vmSymbols::java_lang_NullPointerException()); 1836 } 1837 objArrayOop chunk = objArrayOop(backtrace(throwable)); 1838 int depth = 0; 1839 if (chunk != NULL) { 1840 // Iterate over chunks and count full ones 1841 while (true) { 1842 objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset)); 1843 if (next == NULL) break; 1844 depth += trace_chunk_size; 1845 chunk = next; 1846 } 1847 assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check"); 1848 // Count element in remaining partial chunk. NULL value for mirror 1849 // marks the end of the stack trace elements that are saved. 1850 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk); 1851 assert(mirrors != NULL, "sanity check"); 1852 for (int i = 0; i < mirrors->length(); i++) { 1853 if (mirrors->obj_at(i) == NULL) break; 1854 depth++; 1855 } 1856 } 1857 return depth; 1858 } 1859 1860 1861 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) { 1862 if (throwable == NULL) { 1863 THROW_0(vmSymbols::java_lang_NullPointerException()); 1864 } 1865 if (index < 0) { 1866 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 1867 } 1868 // Compute how many chunks to skip and index into actual chunk 1869 objArrayOop chunk = objArrayOop(backtrace(throwable)); 1870 int skip_chunks = index / trace_chunk_size; 1871 int chunk_index = index % trace_chunk_size; 1872 while (chunk != NULL && skip_chunks > 0) { 1873 chunk = objArrayOop(chunk->obj_at(trace_next_offset)); 1874 skip_chunks--; 1875 } 1876 if (chunk == NULL) { 1877 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 1878 } 1879 // Get method id, bci, version, mirror and cpref from chunk 1880 typeArrayOop methods = BacktraceBuilder::get_methods(chunk); 1881 typeArrayOop bcis = BacktraceBuilder::get_bcis(chunk); 1882 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk); 1883 typeArrayOop cprefs = BacktraceBuilder::get_cprefs(chunk); 1884 1885 assert(methods != NULL && bcis != NULL && mirrors != NULL, "sanity check"); 1886 1887 int method = methods->short_at(chunk_index); 1888 int version = version_at(bcis->int_at(chunk_index)); 1889 int bci = bci_at(bcis->int_at(chunk_index)); 1890 int cpref = cprefs->short_at(chunk_index); 1891 Handle mirror(THREAD, mirrors->obj_at(chunk_index)); 1892 1893 // Chunk can be partial full 1894 if (mirror.is_null()) { 1895 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 1896 } 1897 oop element = java_lang_StackTraceElement::create(mirror, method, version, bci, cpref, CHECK_0); 1898 return element; 1899 } 1900 1901 oop java_lang_StackTraceElement::create(Handle mirror, int method_id, 1902 int version, int bci, int cpref, TRAPS) { 1903 // Allocate java.lang.StackTraceElement instance 1904 Klass* k = SystemDictionary::StackTraceElement_klass(); 1905 assert(k != NULL, "must be loaded in 1.4+"); 1906 instanceKlassHandle ik (THREAD, k); 1907 if (ik->should_be_initialized()) { 1908 ik->initialize(CHECK_0); 1909 } 1910 1911 Handle element = ik->allocate_instance_handle(CHECK_0); 1912 // Fill in class name 1913 ResourceMark rm(THREAD); 1914 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 1915 const char* str = holder->external_name(); 1916 oop classname = StringTable::intern((char*) str, CHECK_0); 1917 java_lang_StackTraceElement::set_declaringClass(element(), classname); 1918 1919 Method* method = holder->method_with_orig_idnum(method_id, version); 1920 1921 // The method can be NULL if the requested class version is gone 1922 Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref); 1923 1924 // Fill in method name 1925 oop methodname = StringTable::intern(sym, CHECK_0); 1926 java_lang_StackTraceElement::set_methodName(element(), methodname); 1927 1928 if (!version_matches(method, version)) { 1929 // The method was redefined, accurate line number information isn't available 1930 java_lang_StackTraceElement::set_fileName(element(), NULL); 1931 java_lang_StackTraceElement::set_lineNumber(element(), -1); 1932 } else { 1933 // Fill in source file name and line number. 1934 Symbol* source = get_source_file_name(holder, version); 1935 if (ShowHiddenFrames && source == NULL) 1936 source = vmSymbols::unknown_class_name(); 1937 oop filename = StringTable::intern(source, CHECK_0); 1938 java_lang_StackTraceElement::set_fileName(element(), filename); 1939 1940 int line_number = get_line_number(method, bci); 1941 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 1942 } 1943 return element(); 1944 } 1945 1946 oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) { 1947 Handle mirror (THREAD, method->method_holder()->java_mirror()); 1948 int method_id = method->orig_method_idnum(); 1949 int cpref = method->name_index(); 1950 return create(mirror, method_id, method->constants()->version(), bci, cpref, THREAD); 1951 } 1952 1953 void java_lang_reflect_AccessibleObject::compute_offsets() { 1954 Klass* k = SystemDictionary::reflect_AccessibleObject_klass(); 1955 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature()); 1956 } 1957 1958 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 1959 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1960 return (jboolean) reflect->bool_field(override_offset); 1961 } 1962 1963 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 1964 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1965 reflect->bool_field_put(override_offset, (int) value); 1966 } 1967 1968 void java_lang_reflect_Method::compute_offsets() { 1969 Klass* k = SystemDictionary::reflect_Method_klass(); 1970 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 1971 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1972 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature()); 1973 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 1974 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 1975 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 1976 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 1977 // The generic signature and annotations fields are only present in 1.5 1978 signature_offset = -1; 1979 annotations_offset = -1; 1980 parameter_annotations_offset = -1; 1981 annotation_default_offset = -1; 1982 type_annotations_offset = -1; 1983 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 1984 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 1985 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 1986 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature()); 1987 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 1988 } 1989 1990 Handle java_lang_reflect_Method::create(TRAPS) { 1991 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1992 Klass* klass = SystemDictionary::reflect_Method_klass(); 1993 // This class is eagerly initialized during VM initialization, since we keep a refence 1994 // to one of the methods 1995 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized"); 1996 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD); 1997 } 1998 1999 oop java_lang_reflect_Method::clazz(oop reflect) { 2000 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2001 return reflect->obj_field(clazz_offset); 2002 } 2003 2004 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 2005 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2006 reflect->obj_field_put(clazz_offset, value); 2007 } 2008 2009 int java_lang_reflect_Method::slot(oop reflect) { 2010 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2011 return reflect->int_field(slot_offset); 2012 } 2013 2014 void java_lang_reflect_Method::set_slot(oop reflect, int value) { 2015 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2016 reflect->int_field_put(slot_offset, value); 2017 } 2018 2019 oop java_lang_reflect_Method::name(oop method) { 2020 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2021 return method->obj_field(name_offset); 2022 } 2023 2024 void java_lang_reflect_Method::set_name(oop method, oop value) { 2025 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2026 method->obj_field_put(name_offset, value); 2027 } 2028 2029 oop java_lang_reflect_Method::return_type(oop method) { 2030 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2031 return method->obj_field(returnType_offset); 2032 } 2033 2034 void java_lang_reflect_Method::set_return_type(oop method, oop value) { 2035 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2036 method->obj_field_put(returnType_offset, value); 2037 } 2038 2039 oop java_lang_reflect_Method::parameter_types(oop method) { 2040 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2041 return method->obj_field(parameterTypes_offset); 2042 } 2043 2044 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 2045 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2046 method->obj_field_put(parameterTypes_offset, value); 2047 } 2048 2049 oop java_lang_reflect_Method::exception_types(oop method) { 2050 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2051 return method->obj_field(exceptionTypes_offset); 2052 } 2053 2054 void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 2055 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2056 method->obj_field_put(exceptionTypes_offset, value); 2057 } 2058 2059 int java_lang_reflect_Method::modifiers(oop method) { 2060 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2061 return method->int_field(modifiers_offset); 2062 } 2063 2064 void java_lang_reflect_Method::set_modifiers(oop method, int value) { 2065 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2066 method->int_field_put(modifiers_offset, value); 2067 } 2068 2069 bool java_lang_reflect_Method::has_signature_field() { 2070 return (signature_offset >= 0); 2071 } 2072 2073 oop java_lang_reflect_Method::signature(oop method) { 2074 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2075 assert(has_signature_field(), "signature field must be present"); 2076 return method->obj_field(signature_offset); 2077 } 2078 2079 void java_lang_reflect_Method::set_signature(oop method, oop value) { 2080 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2081 assert(has_signature_field(), "signature field must be present"); 2082 method->obj_field_put(signature_offset, value); 2083 } 2084 2085 bool java_lang_reflect_Method::has_annotations_field() { 2086 return (annotations_offset >= 0); 2087 } 2088 2089 oop java_lang_reflect_Method::annotations(oop method) { 2090 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2091 assert(has_annotations_field(), "annotations field must be present"); 2092 return method->obj_field(annotations_offset); 2093 } 2094 2095 void java_lang_reflect_Method::set_annotations(oop method, oop value) { 2096 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2097 assert(has_annotations_field(), "annotations field must be present"); 2098 method->obj_field_put(annotations_offset, value); 2099 } 2100 2101 bool java_lang_reflect_Method::has_parameter_annotations_field() { 2102 return (parameter_annotations_offset >= 0); 2103 } 2104 2105 oop java_lang_reflect_Method::parameter_annotations(oop method) { 2106 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2107 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2108 return method->obj_field(parameter_annotations_offset); 2109 } 2110 2111 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 2112 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2113 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2114 method->obj_field_put(parameter_annotations_offset, value); 2115 } 2116 2117 bool java_lang_reflect_Method::has_annotation_default_field() { 2118 return (annotation_default_offset >= 0); 2119 } 2120 2121 oop java_lang_reflect_Method::annotation_default(oop method) { 2122 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2123 assert(has_annotation_default_field(), "annotation default field must be present"); 2124 return method->obj_field(annotation_default_offset); 2125 } 2126 2127 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 2128 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2129 assert(has_annotation_default_field(), "annotation default field must be present"); 2130 method->obj_field_put(annotation_default_offset, value); 2131 } 2132 2133 bool java_lang_reflect_Method::has_type_annotations_field() { 2134 return (type_annotations_offset >= 0); 2135 } 2136 2137 oop java_lang_reflect_Method::type_annotations(oop method) { 2138 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2139 assert(has_type_annotations_field(), "type_annotations field must be present"); 2140 return method->obj_field(type_annotations_offset); 2141 } 2142 2143 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) { 2144 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2145 assert(has_type_annotations_field(), "type_annotations field must be present"); 2146 method->obj_field_put(type_annotations_offset, value); 2147 } 2148 2149 void java_lang_reflect_Constructor::compute_offsets() { 2150 Klass* k = SystemDictionary::reflect_Constructor_klass(); 2151 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2152 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 2153 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 2154 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 2155 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2156 // The generic signature and annotations fields are only present in 1.5 2157 signature_offset = -1; 2158 annotations_offset = -1; 2159 parameter_annotations_offset = -1; 2160 type_annotations_offset = -1; 2161 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 2162 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 2163 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 2164 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 2165 } 2166 2167 Handle java_lang_reflect_Constructor::create(TRAPS) { 2168 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2169 Symbol* name = vmSymbols::java_lang_reflect_Constructor(); 2170 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2171 instanceKlassHandle klass (THREAD, k); 2172 // Ensure it is initialized 2173 klass->initialize(CHECK_NH); 2174 return klass->allocate_instance_handle(THREAD); 2175 } 2176 2177 oop java_lang_reflect_Constructor::clazz(oop reflect) { 2178 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2179 return reflect->obj_field(clazz_offset); 2180 } 2181 2182 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 2183 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2184 reflect->obj_field_put(clazz_offset, value); 2185 } 2186 2187 oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 2188 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2189 return constructor->obj_field(parameterTypes_offset); 2190 } 2191 2192 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 2193 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2194 constructor->obj_field_put(parameterTypes_offset, value); 2195 } 2196 2197 oop java_lang_reflect_Constructor::exception_types(oop constructor) { 2198 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2199 return constructor->obj_field(exceptionTypes_offset); 2200 } 2201 2202 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 2203 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2204 constructor->obj_field_put(exceptionTypes_offset, value); 2205 } 2206 2207 int java_lang_reflect_Constructor::slot(oop reflect) { 2208 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2209 return reflect->int_field(slot_offset); 2210 } 2211 2212 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 2213 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2214 reflect->int_field_put(slot_offset, value); 2215 } 2216 2217 int java_lang_reflect_Constructor::modifiers(oop constructor) { 2218 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2219 return constructor->int_field(modifiers_offset); 2220 } 2221 2222 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 2223 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2224 constructor->int_field_put(modifiers_offset, value); 2225 } 2226 2227 bool java_lang_reflect_Constructor::has_signature_field() { 2228 return (signature_offset >= 0); 2229 } 2230 2231 oop java_lang_reflect_Constructor::signature(oop constructor) { 2232 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2233 assert(has_signature_field(), "signature field must be present"); 2234 return constructor->obj_field(signature_offset); 2235 } 2236 2237 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 2238 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2239 assert(has_signature_field(), "signature field must be present"); 2240 constructor->obj_field_put(signature_offset, value); 2241 } 2242 2243 bool java_lang_reflect_Constructor::has_annotations_field() { 2244 return (annotations_offset >= 0); 2245 } 2246 2247 oop java_lang_reflect_Constructor::annotations(oop constructor) { 2248 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2249 assert(has_annotations_field(), "annotations field must be present"); 2250 return constructor->obj_field(annotations_offset); 2251 } 2252 2253 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 2254 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2255 assert(has_annotations_field(), "annotations field must be present"); 2256 constructor->obj_field_put(annotations_offset, value); 2257 } 2258 2259 bool java_lang_reflect_Constructor::has_parameter_annotations_field() { 2260 return (parameter_annotations_offset >= 0); 2261 } 2262 2263 oop java_lang_reflect_Constructor::parameter_annotations(oop method) { 2264 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2265 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2266 return method->obj_field(parameter_annotations_offset); 2267 } 2268 2269 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 2270 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2271 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2272 method->obj_field_put(parameter_annotations_offset, value); 2273 } 2274 2275 bool java_lang_reflect_Constructor::has_type_annotations_field() { 2276 return (type_annotations_offset >= 0); 2277 } 2278 2279 oop java_lang_reflect_Constructor::type_annotations(oop constructor) { 2280 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2281 assert(has_type_annotations_field(), "type_annotations field must be present"); 2282 return constructor->obj_field(type_annotations_offset); 2283 } 2284 2285 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) { 2286 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2287 assert(has_type_annotations_field(), "type_annotations field must be present"); 2288 constructor->obj_field_put(type_annotations_offset, value); 2289 } 2290 2291 void java_lang_reflect_Field::compute_offsets() { 2292 Klass* k = SystemDictionary::reflect_Field_klass(); 2293 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2294 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2295 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature()); 2296 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 2297 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2298 // The generic signature and annotations fields are only present in 1.5 2299 signature_offset = -1; 2300 annotations_offset = -1; 2301 type_annotations_offset = -1; 2302 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 2303 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 2304 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 2305 } 2306 2307 Handle java_lang_reflect_Field::create(TRAPS) { 2308 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2309 Symbol* name = vmSymbols::java_lang_reflect_Field(); 2310 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2311 instanceKlassHandle klass (THREAD, k); 2312 // Ensure it is initialized 2313 klass->initialize(CHECK_NH); 2314 return klass->allocate_instance_handle(THREAD); 2315 } 2316 2317 oop java_lang_reflect_Field::clazz(oop reflect) { 2318 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2319 return reflect->obj_field(clazz_offset); 2320 } 2321 2322 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 2323 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2324 reflect->obj_field_put(clazz_offset, value); 2325 } 2326 2327 oop java_lang_reflect_Field::name(oop field) { 2328 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2329 return field->obj_field(name_offset); 2330 } 2331 2332 void java_lang_reflect_Field::set_name(oop field, oop value) { 2333 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2334 field->obj_field_put(name_offset, value); 2335 } 2336 2337 oop java_lang_reflect_Field::type(oop field) { 2338 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2339 return field->obj_field(type_offset); 2340 } 2341 2342 void java_lang_reflect_Field::set_type(oop field, oop value) { 2343 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2344 field->obj_field_put(type_offset, value); 2345 } 2346 2347 int java_lang_reflect_Field::slot(oop reflect) { 2348 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2349 return reflect->int_field(slot_offset); 2350 } 2351 2352 void java_lang_reflect_Field::set_slot(oop reflect, int value) { 2353 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2354 reflect->int_field_put(slot_offset, value); 2355 } 2356 2357 int java_lang_reflect_Field::modifiers(oop field) { 2358 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2359 return field->int_field(modifiers_offset); 2360 } 2361 2362 void java_lang_reflect_Field::set_modifiers(oop field, int value) { 2363 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2364 field->int_field_put(modifiers_offset, value); 2365 } 2366 2367 bool java_lang_reflect_Field::has_signature_field() { 2368 return (signature_offset >= 0); 2369 } 2370 2371 oop java_lang_reflect_Field::signature(oop field) { 2372 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2373 assert(has_signature_field(), "signature field must be present"); 2374 return field->obj_field(signature_offset); 2375 } 2376 2377 void java_lang_reflect_Field::set_signature(oop field, oop value) { 2378 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2379 assert(has_signature_field(), "signature field must be present"); 2380 field->obj_field_put(signature_offset, value); 2381 } 2382 2383 bool java_lang_reflect_Field::has_annotations_field() { 2384 return (annotations_offset >= 0); 2385 } 2386 2387 oop java_lang_reflect_Field::annotations(oop field) { 2388 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2389 assert(has_annotations_field(), "annotations field must be present"); 2390 return field->obj_field(annotations_offset); 2391 } 2392 2393 void java_lang_reflect_Field::set_annotations(oop field, oop value) { 2394 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2395 assert(has_annotations_field(), "annotations field must be present"); 2396 field->obj_field_put(annotations_offset, value); 2397 } 2398 2399 bool java_lang_reflect_Field::has_type_annotations_field() { 2400 return (type_annotations_offset >= 0); 2401 } 2402 2403 oop java_lang_reflect_Field::type_annotations(oop field) { 2404 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2405 assert(has_type_annotations_field(), "type_annotations field must be present"); 2406 return field->obj_field(type_annotations_offset); 2407 } 2408 2409 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) { 2410 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2411 assert(has_type_annotations_field(), "type_annotations field must be present"); 2412 field->obj_field_put(type_annotations_offset, value); 2413 } 2414 2415 void sun_reflect_ConstantPool::compute_offsets() { 2416 Klass* k = SystemDictionary::reflect_ConstantPool_klass(); 2417 // This null test can be removed post beta 2418 if (k != NULL) { 2419 // The field is called ConstantPool* in the sun.reflect.ConstantPool class. 2420 compute_offset(_oop_offset, k, vmSymbols::ConstantPool_name(), vmSymbols::object_signature()); 2421 } 2422 } 2423 2424 void java_lang_reflect_Parameter::compute_offsets() { 2425 Klass* k = SystemDictionary::reflect_Parameter_klass(); 2426 if(NULL != k) { 2427 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2428 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2429 compute_offset(index_offset, k, vmSymbols::index_name(), vmSymbols::int_signature()); 2430 compute_offset(executable_offset, k, vmSymbols::executable_name(), vmSymbols::executable_signature()); 2431 } 2432 } 2433 2434 Handle java_lang_reflect_Parameter::create(TRAPS) { 2435 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2436 Symbol* name = vmSymbols::java_lang_reflect_Parameter(); 2437 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2438 instanceKlassHandle klass (THREAD, k); 2439 // Ensure it is initialized 2440 klass->initialize(CHECK_NH); 2441 return klass->allocate_instance_handle(THREAD); 2442 } 2443 2444 oop java_lang_reflect_Parameter::name(oop param) { 2445 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2446 return param->obj_field(name_offset); 2447 } 2448 2449 void java_lang_reflect_Parameter::set_name(oop param, oop value) { 2450 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2451 param->obj_field_put(name_offset, value); 2452 } 2453 2454 int java_lang_reflect_Parameter::modifiers(oop param) { 2455 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2456 return param->int_field(modifiers_offset); 2457 } 2458 2459 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) { 2460 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2461 param->int_field_put(modifiers_offset, value); 2462 } 2463 2464 int java_lang_reflect_Parameter::index(oop param) { 2465 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2466 return param->int_field(index_offset); 2467 } 2468 2469 void java_lang_reflect_Parameter::set_index(oop param, int value) { 2470 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2471 param->int_field_put(index_offset, value); 2472 } 2473 2474 oop java_lang_reflect_Parameter::executable(oop param) { 2475 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2476 return param->obj_field(executable_offset); 2477 } 2478 2479 void java_lang_reflect_Parameter::set_executable(oop param, oop value) { 2480 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2481 param->obj_field_put(executable_offset, value); 2482 } 2483 2484 2485 Handle sun_reflect_ConstantPool::create(TRAPS) { 2486 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2487 Klass* k = SystemDictionary::reflect_ConstantPool_klass(); 2488 instanceKlassHandle klass (THREAD, k); 2489 // Ensure it is initialized 2490 klass->initialize(CHECK_NH); 2491 return klass->allocate_instance_handle(THREAD); 2492 } 2493 2494 2495 void sun_reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) { 2496 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2497 oop mirror = value->pool_holder()->java_mirror(); 2498 // Save the mirror to get back the constant pool. 2499 reflect->obj_field_put(_oop_offset, mirror); 2500 } 2501 2502 ConstantPool* sun_reflect_ConstantPool::get_cp(oop reflect) { 2503 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2504 2505 oop mirror = reflect->obj_field(_oop_offset); 2506 Klass* k = java_lang_Class::as_Klass(mirror); 2507 assert(k->oop_is_instance(), "Must be"); 2508 2509 // Get the constant pool back from the klass. Since class redefinition 2510 // merges the new constant pool into the old, this is essentially the 2511 // same constant pool as the original. If constant pool merging is 2512 // no longer done in the future, this will have to change to save 2513 // the original. 2514 return InstanceKlass::cast(k)->constants(); 2515 } 2516 2517 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() { 2518 Klass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass(); 2519 // This null test can be removed post beta 2520 if (k != NULL) { 2521 compute_offset(_base_offset, k, 2522 vmSymbols::base_name(), vmSymbols::object_signature()); 2523 } 2524 } 2525 2526 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 2527 Klass* k = SystemDictionary::box_klass(type); 2528 if (k == NULL) return NULL; 2529 instanceKlassHandle h (THREAD, k); 2530 if (!h->is_initialized()) h->initialize(CHECK_0); 2531 return h->allocate_instance(THREAD); 2532 } 2533 2534 2535 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 2536 oop box = initialize_and_allocate(type, CHECK_0); 2537 if (box == NULL) return NULL; 2538 switch (type) { 2539 case T_BOOLEAN: 2540 box->bool_field_put(value_offset, value->z); 2541 break; 2542 case T_CHAR: 2543 box->char_field_put(value_offset, value->c); 2544 break; 2545 case T_FLOAT: 2546 box->float_field_put(value_offset, value->f); 2547 break; 2548 case T_DOUBLE: 2549 box->double_field_put(long_value_offset, value->d); 2550 break; 2551 case T_BYTE: 2552 box->byte_field_put(value_offset, value->b); 2553 break; 2554 case T_SHORT: 2555 box->short_field_put(value_offset, value->s); 2556 break; 2557 case T_INT: 2558 box->int_field_put(value_offset, value->i); 2559 break; 2560 case T_LONG: 2561 box->long_field_put(long_value_offset, value->j); 2562 break; 2563 default: 2564 return NULL; 2565 } 2566 return box; 2567 } 2568 2569 2570 BasicType java_lang_boxing_object::basic_type(oop box) { 2571 if (box == NULL) return T_ILLEGAL; 2572 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2573 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 2574 return T_ILLEGAL; 2575 return type; 2576 } 2577 2578 2579 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 2580 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2581 switch (type) { 2582 case T_BOOLEAN: 2583 value->z = box->bool_field(value_offset); 2584 break; 2585 case T_CHAR: 2586 value->c = box->char_field(value_offset); 2587 break; 2588 case T_FLOAT: 2589 value->f = box->float_field(value_offset); 2590 break; 2591 case T_DOUBLE: 2592 value->d = box->double_field(long_value_offset); 2593 break; 2594 case T_BYTE: 2595 value->b = box->byte_field(value_offset); 2596 break; 2597 case T_SHORT: 2598 value->s = box->short_field(value_offset); 2599 break; 2600 case T_INT: 2601 value->i = box->int_field(value_offset); 2602 break; 2603 case T_LONG: 2604 value->j = box->long_field(long_value_offset); 2605 break; 2606 default: 2607 return T_ILLEGAL; 2608 } // end switch 2609 return type; 2610 } 2611 2612 2613 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 2614 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2615 switch (type) { 2616 case T_BOOLEAN: 2617 box->bool_field_put(value_offset, value->z); 2618 break; 2619 case T_CHAR: 2620 box->char_field_put(value_offset, value->c); 2621 break; 2622 case T_FLOAT: 2623 box->float_field_put(value_offset, value->f); 2624 break; 2625 case T_DOUBLE: 2626 box->double_field_put(long_value_offset, value->d); 2627 break; 2628 case T_BYTE: 2629 box->byte_field_put(value_offset, value->b); 2630 break; 2631 case T_SHORT: 2632 box->short_field_put(value_offset, value->s); 2633 break; 2634 case T_INT: 2635 box->int_field_put(value_offset, value->i); 2636 break; 2637 case T_LONG: 2638 box->long_field_put(long_value_offset, value->j); 2639 break; 2640 default: 2641 return T_ILLEGAL; 2642 } // end switch 2643 return type; 2644 } 2645 2646 2647 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) { 2648 switch (type) { 2649 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break; 2650 case T_CHAR: st->print("%d", value->c); break; 2651 case T_BYTE: st->print("%d", value->b); break; 2652 case T_SHORT: st->print("%d", value->s); break; 2653 case T_INT: st->print("%d", value->i); break; 2654 case T_LONG: st->print(INT64_FORMAT, value->j); break; 2655 case T_FLOAT: st->print("%f", value->f); break; 2656 case T_DOUBLE: st->print("%lf", value->d); break; 2657 default: st->print("type %d?", type); break; 2658 } 2659 } 2660 2661 2662 // Support for java_lang_ref_Reference 2663 HeapWord *java_lang_ref_Reference::pending_list_lock_addr() { 2664 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass()); 2665 address addr = ik->static_field_addr(static_lock_offset); 2666 return (HeapWord*) addr; 2667 } 2668 2669 oop java_lang_ref_Reference::pending_list_lock() { 2670 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass()); 2671 address addr = ik->static_field_addr(static_lock_offset); 2672 if (UseCompressedOops) { 2673 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 2674 } else { 2675 return oopDesc::load_decode_heap_oop((oop*)addr); 2676 } 2677 } 2678 2679 HeapWord *java_lang_ref_Reference::pending_list_addr() { 2680 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass()); 2681 address addr = ik->static_field_addr(static_pending_offset); 2682 // XXX This might not be HeapWord aligned, almost rather be char *. 2683 return (HeapWord*)addr; 2684 } 2685 2686 oop java_lang_ref_Reference::pending_list() { 2687 char *addr = (char *)pending_list_addr(); 2688 if (UseCompressedOops) { 2689 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 2690 } else { 2691 return oopDesc::load_decode_heap_oop((oop*)addr); 2692 } 2693 } 2694 2695 2696 // Support for java_lang_ref_SoftReference 2697 2698 jlong java_lang_ref_SoftReference::timestamp(oop ref) { 2699 return ref->long_field(timestamp_offset); 2700 } 2701 2702 jlong java_lang_ref_SoftReference::clock() { 2703 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass()); 2704 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset); 2705 return *offset; 2706 } 2707 2708 void java_lang_ref_SoftReference::set_clock(jlong value) { 2709 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass()); 2710 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset); 2711 *offset = value; 2712 } 2713 2714 // Support for java_lang_invoke_DirectMethodHandle 2715 2716 int java_lang_invoke_DirectMethodHandle::_member_offset; 2717 2718 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) { 2719 oop member_name = NULL; 2720 bool is_dmh = dmh->is_oop() && java_lang_invoke_DirectMethodHandle::is_instance(dmh); 2721 assert(is_dmh, "a DirectMethodHandle oop is expected"); 2722 if (is_dmh) { 2723 member_name = dmh->obj_field(member_offset_in_bytes()); 2724 } 2725 return member_name; 2726 } 2727 2728 void java_lang_invoke_DirectMethodHandle::compute_offsets() { 2729 Klass* klass_oop = SystemDictionary::DirectMethodHandle_klass(); 2730 if (klass_oop != NULL) { 2731 compute_offset(_member_offset, klass_oop, vmSymbols::member_name(), vmSymbols::java_lang_invoke_MemberName_signature()); 2732 } 2733 } 2734 2735 // Support for java_lang_invoke_MethodHandle 2736 2737 int java_lang_invoke_MethodHandle::_type_offset; 2738 int java_lang_invoke_MethodHandle::_form_offset; 2739 2740 int java_lang_invoke_MemberName::_clazz_offset; 2741 int java_lang_invoke_MemberName::_name_offset; 2742 int java_lang_invoke_MemberName::_type_offset; 2743 int java_lang_invoke_MemberName::_flags_offset; 2744 int java_lang_invoke_MemberName::_vmtarget_offset; 2745 int java_lang_invoke_MemberName::_vmloader_offset; 2746 int java_lang_invoke_MemberName::_vmindex_offset; 2747 2748 int java_lang_invoke_LambdaForm::_vmentry_offset; 2749 2750 void java_lang_invoke_MethodHandle::compute_offsets() { 2751 Klass* klass_oop = SystemDictionary::MethodHandle_klass(); 2752 if (klass_oop != NULL) { 2753 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature()); 2754 compute_offset(_form_offset, klass_oop, vmSymbols::form_name(), vmSymbols::java_lang_invoke_LambdaForm_signature()); 2755 } 2756 } 2757 2758 void java_lang_invoke_MemberName::compute_offsets() { 2759 Klass* klass_oop = SystemDictionary::MemberName_klass(); 2760 if (klass_oop != NULL) { 2761 compute_offset(_clazz_offset, klass_oop, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2762 compute_offset(_name_offset, klass_oop, vmSymbols::name_name(), vmSymbols::string_signature()); 2763 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::object_signature()); 2764 compute_offset(_flags_offset, klass_oop, vmSymbols::flags_name(), vmSymbols::int_signature()); 2765 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 2766 } 2767 } 2768 2769 void java_lang_invoke_LambdaForm::compute_offsets() { 2770 Klass* klass_oop = SystemDictionary::LambdaForm_klass(); 2771 if (klass_oop != NULL) { 2772 compute_offset(_vmentry_offset, klass_oop, vmSymbols::vmentry_name(), vmSymbols::java_lang_invoke_MemberName_signature()); 2773 } 2774 } 2775 2776 bool java_lang_invoke_LambdaForm::is_instance(oop obj) { 2777 return obj != NULL && is_subclass(obj->klass()); 2778 } 2779 2780 2781 oop java_lang_invoke_MethodHandle::type(oop mh) { 2782 return mh->obj_field(_type_offset); 2783 } 2784 2785 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) { 2786 mh->obj_field_put(_type_offset, mtype); 2787 } 2788 2789 oop java_lang_invoke_MethodHandle::form(oop mh) { 2790 assert(_form_offset != 0, ""); 2791 return mh->obj_field(_form_offset); 2792 } 2793 2794 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) { 2795 assert(_form_offset != 0, ""); 2796 mh->obj_field_put(_form_offset, lform); 2797 } 2798 2799 /// MemberName accessors 2800 2801 oop java_lang_invoke_MemberName::clazz(oop mname) { 2802 assert(is_instance(mname), "wrong type"); 2803 return mname->obj_field(_clazz_offset); 2804 } 2805 2806 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) { 2807 assert(is_instance(mname), "wrong type"); 2808 mname->obj_field_put(_clazz_offset, clazz); 2809 } 2810 2811 oop java_lang_invoke_MemberName::name(oop mname) { 2812 assert(is_instance(mname), "wrong type"); 2813 return mname->obj_field(_name_offset); 2814 } 2815 2816 void java_lang_invoke_MemberName::set_name(oop mname, oop name) { 2817 assert(is_instance(mname), "wrong type"); 2818 mname->obj_field_put(_name_offset, name); 2819 } 2820 2821 oop java_lang_invoke_MemberName::type(oop mname) { 2822 assert(is_instance(mname), "wrong type"); 2823 return mname->obj_field(_type_offset); 2824 } 2825 2826 void java_lang_invoke_MemberName::set_type(oop mname, oop type) { 2827 assert(is_instance(mname), "wrong type"); 2828 mname->obj_field_put(_type_offset, type); 2829 } 2830 2831 int java_lang_invoke_MemberName::flags(oop mname) { 2832 assert(is_instance(mname), "wrong type"); 2833 return mname->int_field(_flags_offset); 2834 } 2835 2836 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) { 2837 assert(is_instance(mname), "wrong type"); 2838 mname->int_field_put(_flags_offset, flags); 2839 } 2840 2841 Metadata* java_lang_invoke_MemberName::vmtarget(oop mname) { 2842 assert(is_instance(mname), "wrong type"); 2843 return (Metadata*)mname->address_field(_vmtarget_offset); 2844 } 2845 2846 bool java_lang_invoke_MemberName::is_method(oop mname) { 2847 assert(is_instance(mname), "must be MemberName"); 2848 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0; 2849 } 2850 2851 void java_lang_invoke_MemberName::set_vmtarget(oop mname, Metadata* ref) { 2852 assert(is_instance(mname), "wrong type"); 2853 // check the type of the vmtarget 2854 oop dependency = NULL; 2855 if (ref != NULL) { 2856 switch (flags(mname) & (MN_IS_METHOD | 2857 MN_IS_CONSTRUCTOR | 2858 MN_IS_FIELD)) { 2859 case MN_IS_METHOD: 2860 case MN_IS_CONSTRUCTOR: 2861 assert(ref->is_method(), "should be a method"); 2862 dependency = ((Method*)ref)->method_holder()->java_mirror(); 2863 break; 2864 case MN_IS_FIELD: 2865 assert(ref->is_klass(), "should be a class"); 2866 dependency = ((Klass*)ref)->java_mirror(); 2867 break; 2868 default: 2869 ShouldNotReachHere(); 2870 } 2871 } 2872 mname->address_field_put(_vmtarget_offset, (address)ref); 2873 // Add a reference to the loader (actually mirror because anonymous classes will not have 2874 // distinct loaders) to ensure the metadata is kept alive 2875 // This mirror may be different than the one in clazz field. 2876 mname->obj_field_put(_vmloader_offset, dependency); 2877 } 2878 2879 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) { 2880 assert(is_instance(mname), "wrong type"); 2881 return (intptr_t) mname->address_field(_vmindex_offset); 2882 } 2883 2884 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) { 2885 assert(is_instance(mname), "wrong type"); 2886 mname->address_field_put(_vmindex_offset, (address) index); 2887 } 2888 2889 oop java_lang_invoke_LambdaForm::vmentry(oop lform) { 2890 assert(is_instance(lform), "wrong type"); 2891 return lform->obj_field(_vmentry_offset); 2892 } 2893 2894 2895 // Support for java_lang_invoke_MethodType 2896 2897 int java_lang_invoke_MethodType::_rtype_offset; 2898 int java_lang_invoke_MethodType::_ptypes_offset; 2899 2900 void java_lang_invoke_MethodType::compute_offsets() { 2901 Klass* k = SystemDictionary::MethodType_klass(); 2902 if (k != NULL) { 2903 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature()); 2904 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature()); 2905 } 2906 } 2907 2908 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) { 2909 st->print("("); 2910 objArrayOop pts = ptypes(mt); 2911 for (int i = 0, limit = pts->length(); i < limit; i++) { 2912 java_lang_Class::print_signature(pts->obj_at(i), st); 2913 } 2914 st->print(")"); 2915 java_lang_Class::print_signature(rtype(mt), st); 2916 } 2917 2918 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) { 2919 ResourceMark rm; 2920 stringStream buffer(128); 2921 print_signature(mt, &buffer); 2922 const char* sigstr = buffer.base(); 2923 int siglen = (int) buffer.size(); 2924 Symbol *name; 2925 if (!intern_if_not_found) { 2926 name = SymbolTable::probe(sigstr, siglen); 2927 } else { 2928 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 2929 } 2930 return name; 2931 } 2932 2933 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) { 2934 if (mt1 == mt2) 2935 return true; 2936 if (rtype(mt1) != rtype(mt2)) 2937 return false; 2938 if (ptype_count(mt1) != ptype_count(mt2)) 2939 return false; 2940 for (int i = ptype_count(mt1) - 1; i >= 0; i--) { 2941 if (ptype(mt1, i) != ptype(mt2, i)) 2942 return false; 2943 } 2944 return true; 2945 } 2946 2947 oop java_lang_invoke_MethodType::rtype(oop mt) { 2948 assert(is_instance(mt), "must be a MethodType"); 2949 return mt->obj_field(_rtype_offset); 2950 } 2951 2952 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) { 2953 assert(is_instance(mt), "must be a MethodType"); 2954 return (objArrayOop) mt->obj_field(_ptypes_offset); 2955 } 2956 2957 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) { 2958 return ptypes(mt)->obj_at(idx); 2959 } 2960 2961 int java_lang_invoke_MethodType::ptype_count(oop mt) { 2962 return ptypes(mt)->length(); 2963 } 2964 2965 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) { 2966 objArrayOop pts = ptypes(mt); 2967 int count = pts->length(); 2968 int slots = 0; 2969 for (int i = 0; i < count; i++) { 2970 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i)); 2971 slots += type2size[bt]; 2972 } 2973 return slots; 2974 } 2975 2976 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) { 2977 BasicType bt = java_lang_Class::as_BasicType(rtype(mt)); 2978 return type2size[bt]; 2979 } 2980 2981 2982 // Support for java_lang_invoke_CallSite 2983 2984 int java_lang_invoke_CallSite::_target_offset; 2985 int java_lang_invoke_CallSite::_context_offset; 2986 2987 void java_lang_invoke_CallSite::compute_offsets() { 2988 Klass* k = SystemDictionary::CallSite_klass(); 2989 if (k != NULL) { 2990 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature()); 2991 compute_offset(_context_offset, k, vmSymbols::context_name(), 2992 vmSymbols::java_lang_invoke_MethodHandleNatives_CallSiteContext_signature()); 2993 } 2994 } 2995 2996 oop java_lang_invoke_CallSite::context(oop call_site) { 2997 assert(java_lang_invoke_CallSite::is_instance(call_site), ""); 2998 2999 oop dep_oop = call_site->obj_field(_context_offset); 3000 return dep_oop; 3001 } 3002 3003 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext 3004 3005 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset; 3006 3007 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() { 3008 Klass* k = SystemDictionary::Context_klass(); 3009 if (k != NULL) { 3010 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3011 } 3012 } 3013 3014 nmethodBucket* java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) { 3015 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), ""); 3016 return (nmethodBucket*) (address) call_site->long_field(_vmdependencies_offset); 3017 } 3018 3019 void java_lang_invoke_MethodHandleNatives_CallSiteContext::set_vmdependencies(oop call_site, nmethodBucket* context) { 3020 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), ""); 3021 call_site->long_field_put(_vmdependencies_offset, (jlong) (address) context); 3022 } 3023 3024 // Support for java_security_AccessControlContext 3025 3026 int java_security_AccessControlContext::_context_offset = 0; 3027 int java_security_AccessControlContext::_privilegedContext_offset = 0; 3028 int java_security_AccessControlContext::_isPrivileged_offset = 0; 3029 int java_security_AccessControlContext::_isAuthorized_offset = -1; 3030 3031 void java_security_AccessControlContext::compute_offsets() { 3032 assert(_isPrivileged_offset == 0, "offsets should be initialized only once"); 3033 fieldDescriptor fd; 3034 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass()); 3035 3036 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) { 3037 fatal("Invalid layout of java.security.AccessControlContext"); 3038 } 3039 _context_offset = fd.offset(); 3040 3041 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) { 3042 fatal("Invalid layout of java.security.AccessControlContext"); 3043 } 3044 _privilegedContext_offset = fd.offset(); 3045 3046 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) { 3047 fatal("Invalid layout of java.security.AccessControlContext"); 3048 } 3049 _isPrivileged_offset = fd.offset(); 3050 3051 // The offset may not be present for bootstrapping with older JDK. 3052 if (ik->find_local_field(vmSymbols::isAuthorized_name(), vmSymbols::bool_signature(), &fd)) { 3053 _isAuthorized_offset = fd.offset(); 3054 } 3055 } 3056 3057 3058 bool java_security_AccessControlContext::is_authorized(Handle context) { 3059 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type"); 3060 assert(_isAuthorized_offset != -1, "should be set"); 3061 return context->bool_field(_isAuthorized_offset) != 0; 3062 } 3063 3064 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) { 3065 assert(_isPrivileged_offset != 0, "offsets should have been initialized"); 3066 // Ensure klass is initialized 3067 InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->initialize(CHECK_0); 3068 // Allocate result 3069 oop result = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->allocate_instance(CHECK_0); 3070 // Fill in values 3071 result->obj_field_put(_context_offset, context()); 3072 result->obj_field_put(_privilegedContext_offset, privileged_context()); 3073 result->bool_field_put(_isPrivileged_offset, isPrivileged); 3074 // whitelist AccessControlContexts created by the JVM if present 3075 if (_isAuthorized_offset != -1) { 3076 result->bool_field_put(_isAuthorized_offset, true); 3077 } 3078 return result; 3079 } 3080 3081 3082 // Support for java_lang_ClassLoader 3083 3084 bool java_lang_ClassLoader::offsets_computed = false; 3085 int java_lang_ClassLoader::_loader_data_offset = -1; 3086 int java_lang_ClassLoader::parallelCapable_offset = -1; 3087 3088 ClassLoaderData** java_lang_ClassLoader::loader_data_addr(oop loader) { 3089 assert(loader != NULL && loader->is_oop(), "loader must be oop"); 3090 return (ClassLoaderData**) loader->address_field_addr(_loader_data_offset); 3091 } 3092 3093 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) { 3094 return *java_lang_ClassLoader::loader_data_addr(loader); 3095 } 3096 3097 void java_lang_ClassLoader::compute_offsets() { 3098 assert(!offsets_computed, "offsets should be initialized only once"); 3099 offsets_computed = true; 3100 3101 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7, 3102 Klass* k1 = SystemDictionary::ClassLoader_klass(); 3103 compute_optional_offset(parallelCapable_offset, 3104 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature()); 3105 3106 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3107 } 3108 3109 oop java_lang_ClassLoader::parent(oop loader) { 3110 assert(is_instance(loader), "loader must be oop"); 3111 return loader->obj_field(parent_offset); 3112 } 3113 3114 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) { 3115 assert(is_instance(loader), "loader must be oop"); 3116 assert(cl == NULL || is_instance(cl), "cl argument must be oop"); 3117 oop acl = loader; 3118 debug_only(jint loop_count = 0); 3119 // This loop taken verbatim from ClassLoader.java: 3120 do { 3121 acl = parent(acl); 3122 if (cl == acl) { 3123 return true; 3124 } 3125 assert(++loop_count > 0, "loop_count overflow"); 3126 } while (acl != NULL); 3127 return false; 3128 } 3129 3130 bool java_lang_ClassLoader::is_instance(oop obj) { 3131 return obj != NULL && is_subclass(obj->klass()); 3132 } 3133 3134 3135 // For class loader classes, parallelCapable defined 3136 // based on non-null field 3137 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it 3138 bool java_lang_ClassLoader::parallelCapable(oop class_loader) { 3139 if (parallelCapable_offset == -1) { 3140 // Default for backward compatibility is false 3141 return false; 3142 } 3143 return (class_loader->obj_field(parallelCapable_offset) != NULL); 3144 } 3145 3146 bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 3147 // Fix for 4474172; see evaluation for more details 3148 loader = non_reflection_class_loader(loader); 3149 3150 oop cl = SystemDictionary::java_system_loader(); 3151 while(cl != NULL) { 3152 if (cl == loader) return true; 3153 cl = parent(cl); 3154 } 3155 return false; 3156 } 3157 3158 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) { 3159 if (loader != NULL) { 3160 // See whether this is one of the class loaders associated with 3161 // the generated bytecodes for reflection, and if so, "magically" 3162 // delegate to its parent to prevent class loading from occurring 3163 // in places where applications using reflection didn't expect it. 3164 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass(); 3165 // This might be null in non-1.4 JDKs 3166 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) { 3167 return parent(loader); 3168 } 3169 } 3170 return loader; 3171 } 3172 3173 3174 // Support for java_lang_System 3175 int java_lang_System::in_offset_in_bytes() { 3176 return (InstanceMirrorKlass::offset_of_static_fields() + static_in_offset); 3177 } 3178 3179 3180 int java_lang_System::out_offset_in_bytes() { 3181 return (InstanceMirrorKlass::offset_of_static_fields() + static_out_offset); 3182 } 3183 3184 3185 int java_lang_System::err_offset_in_bytes() { 3186 return (InstanceMirrorKlass::offset_of_static_fields() + static_err_offset); 3187 } 3188 3189 3190 bool java_lang_System::has_security_manager() { 3191 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::System_klass()); 3192 address addr = ik->static_field_addr(static_security_offset); 3193 if (UseCompressedOops) { 3194 return oopDesc::load_decode_heap_oop((narrowOop *)addr) != NULL; 3195 } else { 3196 return oopDesc::load_decode_heap_oop((oop*)addr) != NULL; 3197 } 3198 } 3199 3200 int java_lang_Class::_klass_offset; 3201 int java_lang_Class::_array_klass_offset; 3202 int java_lang_Class::_oop_size_offset; 3203 int java_lang_Class::_static_oop_field_count_offset; 3204 int java_lang_Class::_class_loader_offset; 3205 int java_lang_Class::_protection_domain_offset; 3206 int java_lang_Class::_component_mirror_offset; 3207 int java_lang_Class::_init_lock_offset; 3208 int java_lang_Class::_signers_offset; 3209 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL; 3210 int java_lang_Throwable::backtrace_offset; 3211 int java_lang_Throwable::detailMessage_offset; 3212 int java_lang_Throwable::cause_offset; 3213 int java_lang_Throwable::stackTrace_offset; 3214 int java_lang_Throwable::static_unassigned_stacktrace_offset; 3215 int java_lang_reflect_AccessibleObject::override_offset; 3216 int java_lang_reflect_Method::clazz_offset; 3217 int java_lang_reflect_Method::name_offset; 3218 int java_lang_reflect_Method::returnType_offset; 3219 int java_lang_reflect_Method::parameterTypes_offset; 3220 int java_lang_reflect_Method::exceptionTypes_offset; 3221 int java_lang_reflect_Method::slot_offset; 3222 int java_lang_reflect_Method::modifiers_offset; 3223 int java_lang_reflect_Method::signature_offset; 3224 int java_lang_reflect_Method::annotations_offset; 3225 int java_lang_reflect_Method::parameter_annotations_offset; 3226 int java_lang_reflect_Method::annotation_default_offset; 3227 int java_lang_reflect_Method::type_annotations_offset; 3228 int java_lang_reflect_Constructor::clazz_offset; 3229 int java_lang_reflect_Constructor::parameterTypes_offset; 3230 int java_lang_reflect_Constructor::exceptionTypes_offset; 3231 int java_lang_reflect_Constructor::slot_offset; 3232 int java_lang_reflect_Constructor::modifiers_offset; 3233 int java_lang_reflect_Constructor::signature_offset; 3234 int java_lang_reflect_Constructor::annotations_offset; 3235 int java_lang_reflect_Constructor::parameter_annotations_offset; 3236 int java_lang_reflect_Constructor::type_annotations_offset; 3237 int java_lang_reflect_Field::clazz_offset; 3238 int java_lang_reflect_Field::name_offset; 3239 int java_lang_reflect_Field::type_offset; 3240 int java_lang_reflect_Field::slot_offset; 3241 int java_lang_reflect_Field::modifiers_offset; 3242 int java_lang_reflect_Field::signature_offset; 3243 int java_lang_reflect_Field::annotations_offset; 3244 int java_lang_reflect_Field::type_annotations_offset; 3245 int java_lang_reflect_Parameter::name_offset; 3246 int java_lang_reflect_Parameter::modifiers_offset; 3247 int java_lang_reflect_Parameter::index_offset; 3248 int java_lang_reflect_Parameter::executable_offset; 3249 int java_lang_boxing_object::value_offset; 3250 int java_lang_boxing_object::long_value_offset; 3251 int java_lang_ref_Reference::referent_offset; 3252 int java_lang_ref_Reference::queue_offset; 3253 int java_lang_ref_Reference::next_offset; 3254 int java_lang_ref_Reference::discovered_offset; 3255 int java_lang_ref_Reference::static_lock_offset; 3256 int java_lang_ref_Reference::static_pending_offset; 3257 int java_lang_ref_Reference::number_of_fake_oop_fields; 3258 int java_lang_ref_SoftReference::timestamp_offset; 3259 int java_lang_ref_SoftReference::static_clock_offset; 3260 int java_lang_ClassLoader::parent_offset; 3261 int java_lang_System::static_in_offset; 3262 int java_lang_System::static_out_offset; 3263 int java_lang_System::static_err_offset; 3264 int java_lang_System::static_security_offset; 3265 int java_lang_StackTraceElement::declaringClass_offset; 3266 int java_lang_StackTraceElement::methodName_offset; 3267 int java_lang_StackTraceElement::fileName_offset; 3268 int java_lang_StackTraceElement::lineNumber_offset; 3269 int java_lang_AssertionStatusDirectives::classes_offset; 3270 int java_lang_AssertionStatusDirectives::classEnabled_offset; 3271 int java_lang_AssertionStatusDirectives::packages_offset; 3272 int java_lang_AssertionStatusDirectives::packageEnabled_offset; 3273 int java_lang_AssertionStatusDirectives::deflt_offset; 3274 int java_nio_Buffer::_limit_offset; 3275 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0; 3276 int sun_reflect_ConstantPool::_oop_offset; 3277 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset; 3278 3279 3280 // Support for java_lang_StackTraceElement 3281 3282 void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 3283 element->obj_field_put(fileName_offset, value); 3284 } 3285 3286 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 3287 element->obj_field_put(declaringClass_offset, value); 3288 } 3289 3290 void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 3291 element->obj_field_put(methodName_offset, value); 3292 } 3293 3294 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 3295 element->int_field_put(lineNumber_offset, value); 3296 } 3297 3298 3299 // Support for java Assertions - java_lang_AssertionStatusDirectives. 3300 3301 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 3302 o->obj_field_put(classes_offset, val); 3303 } 3304 3305 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 3306 o->obj_field_put(classEnabled_offset, val); 3307 } 3308 3309 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 3310 o->obj_field_put(packages_offset, val); 3311 } 3312 3313 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 3314 o->obj_field_put(packageEnabled_offset, val); 3315 } 3316 3317 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 3318 o->bool_field_put(deflt_offset, val); 3319 } 3320 3321 3322 // Support for intrinsification of java.nio.Buffer.checkIndex 3323 int java_nio_Buffer::limit_offset() { 3324 return _limit_offset; 3325 } 3326 3327 3328 void java_nio_Buffer::compute_offsets() { 3329 Klass* k = SystemDictionary::nio_Buffer_klass(); 3330 assert(k != NULL, "must be loaded in 1.4+"); 3331 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature()); 3332 } 3333 3334 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) { 3335 if (_owner_offset != 0) return; 3336 3337 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK); 3338 Klass* k = SystemDictionary::abstract_ownable_synchronizer_klass(); 3339 compute_offset(_owner_offset, k, 3340 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature()); 3341 } 3342 3343 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 3344 assert(_owner_offset != 0, "Must be initialized"); 3345 return obj->obj_field(_owner_offset); 3346 } 3347 3348 // Compute hard-coded offsets 3349 // Invoked before SystemDictionary::initialize, so pre-loaded classes 3350 // are not available to determine the offset_of_static_fields. 3351 void JavaClasses::compute_hard_coded_offsets() { 3352 const int x = heapOopSize; 3353 const int header = instanceOopDesc::base_offset_in_bytes(); 3354 3355 // Throwable Class 3356 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header; 3357 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header; 3358 java_lang_Throwable::cause_offset = java_lang_Throwable::hc_cause_offset * x + header; 3359 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header; 3360 java_lang_Throwable::static_unassigned_stacktrace_offset = java_lang_Throwable::hc_static_unassigned_stacktrace_offset * x; 3361 3362 // java_lang_boxing_object 3363 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header; 3364 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong); 3365 3366 // java_lang_ref_Reference: 3367 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header; 3368 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header; 3369 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header; 3370 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header; 3371 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x; 3372 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x; 3373 // Artificial fields for java_lang_ref_Reference 3374 // The first field is for the discovered field added in 1.4 3375 java_lang_ref_Reference::number_of_fake_oop_fields = 1; 3376 3377 // java_lang_ref_SoftReference Class 3378 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong); 3379 // Don't multiply static fields because they are always in wordSize units 3380 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x; 3381 3382 // java_lang_ClassLoader 3383 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header; 3384 3385 // java_lang_System 3386 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x; 3387 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x; 3388 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x; 3389 java_lang_System::static_security_offset = java_lang_System::hc_static_security_offset * x; 3390 3391 // java_lang_StackTraceElement 3392 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header; 3393 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header; 3394 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header; 3395 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header; 3396 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header; 3397 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header; 3398 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header; 3399 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header; 3400 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header; 3401 3402 } 3403 3404 3405 // Compute non-hard-coded field offsets of all the classes in this file 3406 void JavaClasses::compute_offsets() { 3407 // java_lang_Class::compute_offsets was called earlier in bootstrap 3408 java_lang_ClassLoader::compute_offsets(); 3409 java_lang_Thread::compute_offsets(); 3410 java_lang_ThreadGroup::compute_offsets(); 3411 java_lang_invoke_MethodHandle::compute_offsets(); 3412 java_lang_invoke_DirectMethodHandle::compute_offsets(); 3413 java_lang_invoke_MemberName::compute_offsets(); 3414 java_lang_invoke_LambdaForm::compute_offsets(); 3415 java_lang_invoke_MethodType::compute_offsets(); 3416 java_lang_invoke_CallSite::compute_offsets(); 3417 java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets(); 3418 java_security_AccessControlContext::compute_offsets(); 3419 // Initialize reflection classes. The layouts of these classes 3420 // changed with the new reflection implementation in JDK 1.4, and 3421 // since the Universe doesn't know what JDK version it is until this 3422 // point we defer computation of these offsets until now. 3423 java_lang_reflect_AccessibleObject::compute_offsets(); 3424 java_lang_reflect_Method::compute_offsets(); 3425 java_lang_reflect_Constructor::compute_offsets(); 3426 java_lang_reflect_Field::compute_offsets(); 3427 java_nio_Buffer::compute_offsets(); 3428 sun_reflect_ConstantPool::compute_offsets(); 3429 sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets(); 3430 java_lang_reflect_Parameter::compute_offsets(); 3431 3432 // generated interpreter code wants to know about the offsets we just computed: 3433 AbstractAssembler::update_delayed_values(); 3434 } 3435 3436 #ifndef PRODUCT 3437 3438 // These functions exist to assert the validity of hard-coded field offsets to guard 3439 // against changes in the class files 3440 3441 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 3442 EXCEPTION_MARK; 3443 fieldDescriptor fd; 3444 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3445 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3446 instanceKlassHandle h_klass (THREAD, k); 3447 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3448 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3449 if (!h_klass->find_local_field(f_name, f_sig, &fd)) { 3450 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 3451 return false; 3452 } 3453 if (fd.is_static()) { 3454 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 3455 return false; 3456 } 3457 if (fd.offset() == hardcoded_offset ) { 3458 return true; 3459 } else { 3460 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.", 3461 klass_name, field_name, hardcoded_offset, fd.offset()); 3462 return false; 3463 } 3464 } 3465 3466 3467 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 3468 EXCEPTION_MARK; 3469 fieldDescriptor fd; 3470 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3471 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3472 instanceKlassHandle h_klass (THREAD, k); 3473 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3474 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3475 if (!h_klass->find_local_field(f_name, f_sig, &fd)) { 3476 tty->print_cr("Static field %s.%s not found", klass_name, field_name); 3477 return false; 3478 } 3479 if (!fd.is_static()) { 3480 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name); 3481 return false; 3482 } 3483 if (fd.offset() == hardcoded_offset + InstanceMirrorKlass::offset_of_static_fields()) { 3484 return true; 3485 } else { 3486 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()); 3487 return false; 3488 } 3489 } 3490 3491 3492 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) { 3493 EXCEPTION_MARK; 3494 fieldDescriptor fd; 3495 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3496 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3497 instanceKlassHandle h_klass (THREAD, k); 3498 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3499 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3500 if (!h_klass->find_local_field(f_name, f_sig, &fd)) { 3501 tty->print_cr("Static field %s.%s not found", klass_name, field_name); 3502 return false; 3503 } 3504 if (!fd.is_static() || !fd.has_initial_value()) { 3505 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name); 3506 return false; 3507 } 3508 if (!fd.initial_value_tag().is_int()) { 3509 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name); 3510 return false; 3511 } 3512 jint field_value = fd.int_initial_value(); 3513 if (field_value == hardcoded_constant) { 3514 return true; 3515 } else { 3516 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); 3517 return false; 3518 } 3519 } 3520 3521 3522 // Check the hard-coded field offsets of all the classes in this file 3523 3524 void JavaClasses::check_offsets() { 3525 bool valid = true; 3526 HandleMark hm; 3527 3528 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3529 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig) 3530 3531 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3532 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig) 3533 3534 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3535 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig) 3536 3537 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \ 3538 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig) 3539 3540 // java.lang.String 3541 3542 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C"); 3543 if (java_lang_String::has_offset_field()) { 3544 CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I"); 3545 CHECK_OFFSET("java/lang/String", java_lang_String, count, "I"); 3546 } 3547 if (java_lang_String::has_hash_field()) { 3548 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I"); 3549 } 3550 3551 // java.lang.Class 3552 3553 // Fake fields 3554 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked 3555 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked 3556 3557 // java.lang.Throwable 3558 3559 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;"); 3560 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;"); 3561 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;"); 3562 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;"); 3563 3564 // Boxed primitive objects (java_lang_boxing_object) 3565 3566 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 3567 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 3568 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 3569 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 3570 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 3571 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 3572 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 3573 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 3574 3575 // java.lang.ClassLoader 3576 3577 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;"); 3578 3579 // java.lang.System 3580 3581 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;"); 3582 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;"); 3583 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;"); 3584 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, security, "Ljava/lang/SecurityManager;"); 3585 3586 // java.lang.StackTraceElement 3587 3588 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;"); 3589 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;"); 3590 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;"); 3591 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I"); 3592 3593 // java.lang.ref.Reference 3594 3595 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;"); 3596 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;"); 3597 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;"); 3598 // Fake field 3599 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;"); 3600 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;"); 3601 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;"); 3602 3603 // java.lang.ref.SoftReference 3604 3605 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J"); 3606 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J"); 3607 3608 // java.lang.AssertionStatusDirectives 3609 // 3610 // The CheckAssertionStatusDirectives boolean can be removed from here and 3611 // globals.hpp after the AssertionStatusDirectives class has been integrated 3612 // into merlin "for some time." Without it, the vm will fail with early 3613 // merlin builds. 3614 3615 if (CheckAssertionStatusDirectives) { 3616 const char* nm = "java/lang/AssertionStatusDirectives"; 3617 const char* sig = "[Ljava/lang/String;"; 3618 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig); 3619 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z"); 3620 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig); 3621 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z"); 3622 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z"); 3623 } 3624 3625 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed"); 3626 } 3627 3628 #endif // PRODUCT 3629 3630 int InjectedField::compute_offset() { 3631 Klass* klass_oop = klass(); 3632 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) { 3633 if (!may_be_java && !fs.access_flags().is_internal()) { 3634 // Only look at injected fields 3635 continue; 3636 } 3637 if (fs.name() == name() && fs.signature() == signature()) { 3638 return fs.offset(); 3639 } 3640 } 3641 ResourceMark rm; 3642 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)" : ""); 3643 #ifndef PRODUCT 3644 klass_oop->print(); 3645 tty->print_cr("all fields:"); 3646 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) { 3647 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 3648 } 3649 #endif //PRODUCT 3650 vm_exit_during_initialization("Invalid layout of preloaded class: use -XX:+TraceClassLoading to see the origin of the problem class"); 3651 return -1; 3652 } 3653 3654 void javaClasses_init() { 3655 JavaClasses::compute_offsets(); 3656 JavaClasses::check_offsets(); 3657 FilteredFieldsMap::initialize(); // must be done after computing offsets. 3658 }