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 "compiler/compilerOracle.hpp" 33 #include "interpreter/interpreter.hpp" 34 #include "memory/oopFactory.hpp" 35 #include "memory/resourceArea.hpp" 36 #include "memory/universe.inline.hpp" 37 #include "oops/fieldStreams.hpp" 38 #include "oops/instanceKlass.hpp" 39 #include "oops/instanceMirrorKlass.hpp" 40 #include "oops/klass.hpp" 41 #include "oops/method.hpp" 42 #include "oops/objArrayOop.inline.hpp" 43 #include "oops/oop.inline.hpp" 44 #include "oops/symbol.hpp" 45 #include "oops/typeArrayOop.hpp" 46 #include "prims/jvmtiRedefineClassesTrace.hpp" 47 #include "runtime/fieldDescriptor.hpp" 48 #include "runtime/handles.inline.hpp" 49 #include "runtime/interfaceSupport.hpp" 50 #include "runtime/java.hpp" 51 #include "runtime/javaCalls.hpp" 52 #include "runtime/safepoint.hpp" 53 #include "runtime/thread.inline.hpp" 54 #include "runtime/vframe.hpp" 55 #include "utilities/preserveException.hpp" 56 57 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC 58 59 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \ 60 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum); 61 62 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \ 63 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java }, 64 65 InjectedField JavaClasses::_injected_fields[] = { 66 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD) 67 }; 68 69 int JavaClasses::compute_injected_offset(InjectedFieldID id) { 70 return _injected_fields[id].compute_offset(); 71 } 72 73 74 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) { 75 *field_count = 0; 76 77 vmSymbols::SID sid = vmSymbols::find_sid(class_name); 78 if (sid == vmSymbols::NO_SID) { 79 // Only well known classes can inject fields 80 return NULL; 81 } 82 83 int count = 0; 84 int start = -1; 85 86 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \ 87 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \ 88 count++; \ 89 if (start == -1) start = klass##_##name##_enum; \ 90 } 91 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD); 92 #undef LOOKUP_INJECTED_FIELD 93 94 if (start != -1) { 95 *field_count = count; 96 return _injected_fields + start; 97 } 98 return NULL; 99 } 100 101 102 static bool find_field(InstanceKlass* ik, 103 Symbol* name_symbol, Symbol* signature_symbol, 104 fieldDescriptor* fd, 105 bool allow_super = false) { 106 if (allow_super) 107 return ik->find_field(name_symbol, signature_symbol, fd) != NULL; 108 else 109 return ik->find_local_field(name_symbol, signature_symbol, fd); 110 } 111 112 // Helpful routine for computing field offsets at run time rather than hardcoding them 113 static void 114 compute_offset(int &dest_offset, 115 Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol, 116 bool allow_super = false) { 117 fieldDescriptor fd; 118 InstanceKlass* ik = InstanceKlass::cast(klass_oop); 119 if (!find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) { 120 ResourceMark rm; 121 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string()); 122 #ifndef PRODUCT 123 klass_oop->print(); 124 tty->print_cr("all fields:"); 125 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) { 126 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 127 } 128 #endif //PRODUCT 129 fatal("Invalid layout of preloaded class"); 130 } 131 dest_offset = fd.offset(); 132 } 133 134 // Same as above but for "optional" offsets that might not be present in certain JDK versions 135 static void 136 compute_optional_offset(int& dest_offset, 137 Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol, 138 bool allow_super = false) { 139 fieldDescriptor fd; 140 InstanceKlass* ik = InstanceKlass::cast(klass_oop); 141 if (find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) { 142 dest_offset = fd.offset(); 143 } 144 } 145 146 147 int java_lang_String::value_offset = 0; 148 int java_lang_String::offset_offset = 0; 149 int java_lang_String::count_offset = 0; 150 int java_lang_String::hash_offset = 0; 151 152 bool java_lang_String::initialized = false; 153 154 bool java_lang_String::is_instance(oop obj) { 155 return is_instance_inlined(obj); 156 } 157 158 void java_lang_String::compute_offsets() { 159 assert(!initialized, "offsets should be initialized only once"); 160 161 Klass* k = SystemDictionary::String_klass(); 162 compute_offset(value_offset, k, vmSymbols::value_name(), vmSymbols::char_array_signature()); 163 compute_optional_offset(offset_offset, k, vmSymbols::offset_name(), vmSymbols::int_signature()); 164 compute_optional_offset(count_offset, k, vmSymbols::count_name(), vmSymbols::int_signature()); 165 compute_optional_offset(hash_offset, k, vmSymbols::hash_name(), vmSymbols::int_signature()); 166 167 initialized = true; 168 } 169 170 Handle java_lang_String::basic_create(int length, TRAPS) { 171 assert(initialized, "Must be initialized"); 172 // Create the String object first, so there's a chance that the String 173 // and the char array it points to end up in the same cache line. 174 oop obj; 175 obj = InstanceKlass::cast(SystemDictionary::String_klass())->allocate_instance(CHECK_NH); 176 177 // Create the char array. The String object must be handlized here 178 // because GC can happen as a result of the allocation attempt. 179 Handle h_obj(THREAD, obj); 180 typeArrayOop buffer; 181 buffer = oopFactory::new_charArray(length, CHECK_NH); 182 183 // Point the String at the char array 184 obj = h_obj(); 185 set_value(obj, buffer); 186 // No need to zero the offset, allocation zero'ed the entire String object 187 assert(offset(obj) == 0, "initial String offset should be zero"); 188 //set_offset(obj, 0); 189 set_count(obj, length); 190 191 return h_obj; 192 } 193 194 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) { 195 Handle h_obj = basic_create(length, CHECK_NH); 196 typeArrayOop buffer = value(h_obj()); 197 for (int index = 0; index < length; index++) { 198 buffer->char_at_put(index, unicode[index]); 199 } 200 return h_obj; 201 } 202 203 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) { 204 Handle h_obj = create_from_unicode(unicode, length, CHECK_0); 205 return h_obj(); 206 } 207 208 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) { 209 if (utf8_str == NULL) { 210 return Handle(); 211 } 212 int length = UTF8::unicode_length(utf8_str); 213 Handle h_obj = basic_create(length, CHECK_NH); 214 if (length > 0) { 215 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 216 } 217 return h_obj; 218 } 219 220 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) { 221 Handle h_obj = create_from_str(utf8_str, CHECK_0); 222 return h_obj(); 223 } 224 225 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) { 226 int length = UTF8::unicode_length((char*)symbol->bytes(), symbol->utf8_length()); 227 Handle h_obj = basic_create(length, CHECK_NH); 228 if (length > 0) { 229 UTF8::convert_to_unicode((char*)symbol->bytes(), value(h_obj())->char_at_addr(0), length); 230 } 231 return h_obj; 232 } 233 234 // Converts a C string to a Java String based on current encoding 235 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) { 236 assert(str != NULL, "bad arguments"); 237 238 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *); 239 static to_java_string_fn_t _to_java_string_fn = NULL; 240 241 if (_to_java_string_fn == NULL) { 242 void *lib_handle = os::native_java_library(); 243 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform")); 244 if (_to_java_string_fn == NULL) { 245 fatal("NewStringPlatform missing"); 246 } 247 } 248 249 jstring js = NULL; 250 { JavaThread* thread = (JavaThread*)THREAD; 251 assert(thread->is_Java_thread(), "must be java thread"); 252 HandleMark hm(thread); 253 ThreadToNativeFromVM ttn(thread); 254 js = (_to_java_string_fn)(thread->jni_environment(), str); 255 } 256 return Handle(THREAD, JNIHandles::resolve(js)); 257 } 258 259 // Converts a Java String to a native C string that can be used for 260 // native OS calls. 261 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) { 262 263 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*); 264 static to_platform_string_fn_t _to_platform_string_fn = NULL; 265 266 if (_to_platform_string_fn == NULL) { 267 void *lib_handle = os::native_java_library(); 268 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars")); 269 if (_to_platform_string_fn == NULL) { 270 fatal("GetStringPlatformChars missing"); 271 } 272 } 273 274 char *native_platform_string; 275 { JavaThread* thread = (JavaThread*)THREAD; 276 assert(thread->is_Java_thread(), "must be java thread"); 277 JNIEnv *env = thread->jni_environment(); 278 jstring js = (jstring) JNIHandles::make_local(env, java_string()); 279 bool is_copy; 280 HandleMark hm(thread); 281 ThreadToNativeFromVM ttn(thread); 282 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy); 283 assert(is_copy == JNI_TRUE, "is_copy value changed"); 284 JNIHandles::destroy_local(js); 285 } 286 return native_platform_string; 287 } 288 289 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) { 290 oop obj = java_string(); 291 // Typical usage is to convert all '/' to '.' in string. 292 typeArrayOop value = java_lang_String::value(obj); 293 int offset = java_lang_String::offset(obj); 294 int length = java_lang_String::length(obj); 295 296 // First check if any from_char exist 297 int index; // Declared outside, used later 298 for (index = 0; index < length; index++) { 299 if (value->char_at(index + offset) == from_char) { 300 break; 301 } 302 } 303 if (index == length) { 304 // No from_char, so do not copy. 305 return java_string; 306 } 307 308 // Create new UNICODE buffer. Must handlize value because GC 309 // may happen during String and char array creation. 310 typeArrayHandle h_value(THREAD, value); 311 Handle string = basic_create(length, CHECK_NH); 312 313 typeArrayOop from_buffer = h_value(); 314 typeArrayOop to_buffer = java_lang_String::value(string()); 315 316 // Copy contents 317 for (index = 0; index < length; index++) { 318 jchar c = from_buffer->char_at(index + offset); 319 if (c == from_char) { 320 c = to_char; 321 } 322 to_buffer->char_at_put(index, c); 323 } 324 return string; 325 } 326 327 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) { 328 typeArrayOop value = java_lang_String::value(java_string); 329 int offset = java_lang_String::offset(java_string); 330 length = java_lang_String::length(java_string); 331 332 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length); 333 if (result != NULL) { 334 for (int index = 0; index < length; index++) { 335 result[index] = value->char_at(index + offset); 336 } 337 } else { 338 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string"); 339 } 340 return result; 341 } 342 343 unsigned int java_lang_String::hash_code(oop java_string) { 344 int length = java_lang_String::length(java_string); 345 // Zero length string will hash to zero with String.hashCode() function. 346 if (length == 0) return 0; 347 348 typeArrayOop value = java_lang_String::value(java_string); 349 int offset = java_lang_String::offset(java_string); 350 return java_lang_String::hash_code(value->char_at_addr(offset), length); 351 } 352 353 char* java_lang_String::as_quoted_ascii(oop java_string) { 354 typeArrayOop value = java_lang_String::value(java_string); 355 int offset = java_lang_String::offset(java_string); 356 int length = java_lang_String::length(java_string); 357 358 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset); 359 if (base == NULL) return NULL; 360 361 int result_length = UNICODE::quoted_ascii_length(base, length) + 1; 362 char* result = NEW_RESOURCE_ARRAY(char, result_length); 363 UNICODE::as_quoted_ascii(base, length, result, result_length); 364 assert(result_length >= length + 1, "must not be shorter"); 365 assert(result_length == (int)strlen(result) + 1, "must match"); 366 return result; 367 } 368 369 unsigned int java_lang_String::hash_string(oop java_string) { 370 int length = java_lang_String::length(java_string); 371 // Zero length string doesn't hash necessarily hash to zero. 372 if (length == 0) { 373 return StringTable::hash_string(NULL, 0); 374 } 375 376 typeArrayOop value = java_lang_String::value(java_string); 377 int offset = java_lang_String::offset(java_string); 378 return StringTable::hash_string(value->char_at_addr(offset), length); 379 } 380 381 Symbol* java_lang_String::as_symbol(Handle java_string, TRAPS) { 382 oop obj = java_string(); 383 typeArrayOop value = java_lang_String::value(obj); 384 int offset = java_lang_String::offset(obj); 385 int length = java_lang_String::length(obj); 386 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset); 387 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD); 388 return sym; 389 } 390 391 Symbol* java_lang_String::as_symbol_or_null(oop java_string) { 392 typeArrayOop value = java_lang_String::value(java_string); 393 int offset = java_lang_String::offset(java_string); 394 int length = java_lang_String::length(java_string); 395 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset); 396 return SymbolTable::probe_unicode(base, length); 397 } 398 399 400 int java_lang_String::utf8_length(oop java_string) { 401 typeArrayOop value = java_lang_String::value(java_string); 402 int offset = java_lang_String::offset(java_string); 403 int length = java_lang_String::length(java_string); 404 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset); 405 return UNICODE::utf8_length(position, length); 406 } 407 408 char* java_lang_String::as_utf8_string(oop java_string) { 409 typeArrayOop value = java_lang_String::value(java_string); 410 int offset = java_lang_String::offset(java_string); 411 int length = java_lang_String::length(java_string); 412 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset); 413 return UNICODE::as_utf8(position, length); 414 } 415 416 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) { 417 typeArrayOop value = java_lang_String::value(java_string); 418 int offset = java_lang_String::offset(java_string); 419 int length = java_lang_String::length(java_string); 420 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset); 421 return UNICODE::as_utf8(position, length, buf, buflen); 422 } 423 424 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) { 425 typeArrayOop value = java_lang_String::value(java_string); 426 int offset = java_lang_String::offset(java_string); 427 int length = java_lang_String::length(java_string); 428 assert(start + len <= length, "just checking"); 429 jchar* position = value->char_at_addr(offset + start); 430 return UNICODE::as_utf8(position, len); 431 } 432 433 char* java_lang_String::as_utf8_string(oop java_string, int start, int len, char* buf, int buflen) { 434 typeArrayOop value = java_lang_String::value(java_string); 435 int offset = java_lang_String::offset(java_string); 436 int length = java_lang_String::length(java_string); 437 assert(start + len <= length, "just checking"); 438 jchar* position = value->char_at_addr(offset + start); 439 return UNICODE::as_utf8(position, len, buf, buflen); 440 } 441 442 bool java_lang_String::equals(oop java_string, jchar* chars, int len) { 443 assert(java_string->klass() == SystemDictionary::String_klass(), 444 "must be java_string"); 445 typeArrayOop value = java_lang_String::value(java_string); 446 int offset = java_lang_String::offset(java_string); 447 int length = java_lang_String::length(java_string); 448 if (length != len) { 449 return false; 450 } 451 for (int i = 0; i < len; i++) { 452 if (value->char_at(i + offset) != chars[i]) { 453 return false; 454 } 455 } 456 return true; 457 } 458 459 bool java_lang_String::equals(oop str1, oop str2) { 460 assert(str1->klass() == SystemDictionary::String_klass(), 461 "must be java String"); 462 assert(str2->klass() == SystemDictionary::String_klass(), 463 "must be java String"); 464 typeArrayOop value1 = java_lang_String::value(str1); 465 int offset1 = java_lang_String::offset(str1); 466 int length1 = java_lang_String::length(str1); 467 typeArrayOop value2 = java_lang_String::value(str2); 468 int offset2 = java_lang_String::offset(str2); 469 int length2 = java_lang_String::length(str2); 470 471 if (length1 != length2) { 472 return false; 473 } 474 for (int i = 0; i < length1; i++) { 475 if (value1->char_at(i + offset1) != value2->char_at(i + offset2)) { 476 return false; 477 } 478 } 479 return true; 480 } 481 482 void java_lang_String::print(oop java_string, outputStream* st) { 483 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string"); 484 typeArrayOop value = java_lang_String::value(java_string); 485 486 if (value == NULL) { 487 // This can happen if, e.g., printing a String 488 // object before its initializer has been called 489 st->print("NULL"); 490 return; 491 } 492 493 int offset = java_lang_String::offset(java_string); 494 int length = java_lang_String::length(java_string); 495 496 st->print("\""); 497 for (int index = 0; index < length; index++) { 498 st->print("%c", value->char_at(index + offset)); 499 } 500 st->print("\""); 501 } 502 503 504 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 505 assert(mirror.not_null() && fd->is_static(), "just checking"); 506 if (fd->has_initial_value()) { 507 BasicType t = fd->field_type(); 508 switch (t) { 509 case T_BYTE: 510 mirror()->byte_field_put(fd->offset(), fd->int_initial_value()); 511 break; 512 case T_BOOLEAN: 513 mirror()->bool_field_put(fd->offset(), fd->int_initial_value()); 514 break; 515 case T_CHAR: 516 mirror()->char_field_put(fd->offset(), fd->int_initial_value()); 517 break; 518 case T_SHORT: 519 mirror()->short_field_put(fd->offset(), fd->int_initial_value()); 520 break; 521 case T_INT: 522 mirror()->int_field_put(fd->offset(), fd->int_initial_value()); 523 break; 524 case T_FLOAT: 525 mirror()->float_field_put(fd->offset(), fd->float_initial_value()); 526 break; 527 case T_DOUBLE: 528 mirror()->double_field_put(fd->offset(), fd->double_initial_value()); 529 break; 530 case T_LONG: 531 mirror()->long_field_put(fd->offset(), fd->long_initial_value()); 532 break; 533 case T_OBJECT: 534 { 535 #ifdef ASSERT 536 TempNewSymbol sym = SymbolTable::new_symbol("Ljava/lang/String;", CHECK); 537 assert(fd->signature() == sym, "just checking"); 538 #endif 539 oop string = fd->string_initial_value(CHECK); 540 mirror()->obj_field_put(fd->offset(), string); 541 } 542 break; 543 default: 544 THROW_MSG(vmSymbols::java_lang_ClassFormatError(), 545 "Illegal ConstantValue attribute in class file"); 546 } 547 } 548 } 549 550 551 void java_lang_Class::fixup_mirror(KlassHandle k, TRAPS) { 552 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already"); 553 554 // If the offset was read from the shared archive, it was fixed up already 555 if (!k->is_shared()) { 556 if (k->oop_is_instance()) { 557 // During bootstrap, java.lang.Class wasn't loaded so static field 558 // offsets were computed without the size added it. Go back and 559 // update all the static field offsets to included the size. 560 for (JavaFieldStream fs(InstanceKlass::cast(k())); !fs.done(); fs.next()) { 561 if (fs.access_flags().is_static()) { 562 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields(); 563 fs.set_offset(real_offset); 564 } 565 } 566 } 567 } 568 create_mirror(k, Handle(NULL), Handle(NULL), CHECK); 569 } 570 571 void java_lang_Class::initialize_mirror_fields(KlassHandle k, 572 Handle mirror, 573 Handle protection_domain, 574 TRAPS) { 575 // Allocate a simple java object for a lock. 576 // This needs to be a java object because during class initialization 577 // it can be held across a java call. 578 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK); 579 set_init_lock(mirror(), r); 580 581 // Set protection domain also 582 set_protection_domain(mirror(), protection_domain()); 583 584 // Initialize static fields 585 InstanceKlass::cast(k())->do_local_static_fields(&initialize_static_field, mirror, CHECK); 586 } 587 588 void java_lang_Class::create_mirror(KlassHandle k, Handle class_loader, 589 Handle protection_domain, TRAPS) { 590 assert(k->java_mirror() == NULL, "should only assign mirror once"); 591 // Use this moment of initialization to cache modifier_flags also, 592 // to support Class.getModifiers(). Instance classes recalculate 593 // the cached flags after the class file is parsed, but before the 594 // class is put into the system dictionary. 595 int computed_modifiers = k->compute_modifier_flags(CHECK); 596 k->set_modifier_flags(computed_modifiers); 597 // Class_klass has to be loaded because it is used to allocate 598 // the mirror. 599 if (SystemDictionary::Class_klass_loaded()) { 600 // Allocate mirror (java.lang.Class instance) 601 Handle mirror = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK); 602 603 // Setup indirection from mirror->klass 604 if (!k.is_null()) { 605 java_lang_Class::set_klass(mirror(), k()); 606 } 607 608 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass()); 609 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set"); 610 611 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror())); 612 613 // It might also have a component mirror. This mirror must already exist. 614 if (k->oop_is_array()) { 615 Handle comp_mirror; 616 if (k->oop_is_typeArray()) { 617 BasicType type = TypeArrayKlass::cast(k())->element_type(); 618 comp_mirror = Universe::java_mirror(type); 619 } else { 620 assert(k->oop_is_objArray(), "Must be"); 621 Klass* element_klass = ObjArrayKlass::cast(k())->element_klass(); 622 assert(element_klass != NULL, "Must have an element klass"); 623 comp_mirror = element_klass->java_mirror(); 624 } 625 assert(comp_mirror.not_null(), "must have a mirror"); 626 627 // Two-way link between the array klass and its component mirror: 628 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k 629 set_component_mirror(mirror(), comp_mirror()); 630 set_array_klass(comp_mirror(), k()); 631 } else { 632 assert(k->oop_is_instance(), "Must be"); 633 634 initialize_mirror_fields(k, mirror, protection_domain, THREAD); 635 if (HAS_PENDING_EXCEPTION) { 636 // If any of the fields throws an exception like OOM remove the klass field 637 // from the mirror so GC doesn't follow it after the klass has been deallocated. 638 // This mirror looks like a primitive type, which logically it is because it 639 // it represents no class. 640 java_lang_Class::set_klass(mirror(), NULL); 641 return; 642 } 643 } 644 645 // set the classLoader field in the java_lang_Class instance 646 assert(class_loader() == k->class_loader(), "should be same"); 647 set_class_loader(mirror(), class_loader()); 648 649 // Setup indirection from klass->mirror last 650 // after any exceptions can happen during allocations. 651 if (!k.is_null()) { 652 k->set_java_mirror(mirror()); 653 } 654 } else { 655 if (fixup_mirror_list() == NULL) { 656 GrowableArray<Klass*>* list = 657 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true); 658 set_fixup_mirror_list(list); 659 } 660 fixup_mirror_list()->push(k()); 661 } 662 } 663 664 665 int java_lang_Class::oop_size(oop java_class) { 666 assert(_oop_size_offset != 0, "must be set"); 667 return java_class->int_field(_oop_size_offset); 668 } 669 void java_lang_Class::set_oop_size(oop java_class, int size) { 670 assert(_oop_size_offset != 0, "must be set"); 671 java_class->int_field_put(_oop_size_offset, size); 672 } 673 int java_lang_Class::static_oop_field_count(oop java_class) { 674 assert(_static_oop_field_count_offset != 0, "must be set"); 675 return java_class->int_field(_static_oop_field_count_offset); 676 } 677 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) { 678 assert(_static_oop_field_count_offset != 0, "must be set"); 679 java_class->int_field_put(_static_oop_field_count_offset, size); 680 } 681 682 oop java_lang_Class::protection_domain(oop java_class) { 683 assert(_protection_domain_offset != 0, "must be set"); 684 return java_class->obj_field(_protection_domain_offset); 685 } 686 void java_lang_Class::set_protection_domain(oop java_class, oop pd) { 687 assert(_protection_domain_offset != 0, "must be set"); 688 java_class->obj_field_put(_protection_domain_offset, pd); 689 } 690 691 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) { 692 assert(_component_mirror_offset != 0, "must be set"); 693 java_class->obj_field_put(_component_mirror_offset, comp_mirror); 694 } 695 oop java_lang_Class::component_mirror(oop java_class) { 696 assert(_component_mirror_offset != 0, "must be set"); 697 return java_class->obj_field(_component_mirror_offset); 698 } 699 700 oop java_lang_Class::init_lock(oop java_class) { 701 assert(_init_lock_offset != 0, "must be set"); 702 return java_class->obj_field(_init_lock_offset); 703 } 704 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) { 705 assert(_init_lock_offset != 0, "must be set"); 706 java_class->obj_field_put(_init_lock_offset, init_lock); 707 } 708 709 objArrayOop java_lang_Class::signers(oop java_class) { 710 assert(_signers_offset != 0, "must be set"); 711 return (objArrayOop)java_class->obj_field(_signers_offset); 712 } 713 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) { 714 assert(_signers_offset != 0, "must be set"); 715 java_class->obj_field_put(_signers_offset, (oop)signers); 716 } 717 718 719 void java_lang_Class::set_class_loader(oop java_class, oop loader) { 720 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet. 721 if (_class_loader_offset != 0) { 722 java_class->obj_field_put(_class_loader_offset, loader); 723 } 724 } 725 726 oop java_lang_Class::class_loader(oop java_class) { 727 assert(_class_loader_offset != 0, "must be set"); 728 return java_class->obj_field(_class_loader_offset); 729 } 730 731 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) { 732 // This should be improved by adding a field at the Java level or by 733 // introducing a new VM klass (see comment in ClassFileParser) 734 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0); 735 if (type != T_VOID) { 736 Klass* aklass = Universe::typeArrayKlassObj(type); 737 assert(aklass != NULL, "correct bootstrap"); 738 set_array_klass(java_class, aklass); 739 } 740 #ifdef ASSERT 741 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass()); 742 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation"); 743 #endif 744 return java_class; 745 } 746 747 748 Klass* java_lang_Class::as_Klass(oop java_class) { 749 //%note memory_2 750 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 751 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset)); 752 assert(k == NULL || k->is_klass(), "type check"); 753 return k; 754 } 755 756 757 void java_lang_Class::set_klass(oop java_class, Klass* klass) { 758 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 759 java_class->metadata_field_put(_klass_offset, klass); 760 } 761 762 763 void java_lang_Class::print_signature(oop java_class, outputStream* st) { 764 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 765 Symbol* name = NULL; 766 bool is_instance = false; 767 if (is_primitive(java_class)) { 768 name = vmSymbols::type_signature(primitive_type(java_class)); 769 } else { 770 Klass* k = as_Klass(java_class); 771 is_instance = k->oop_is_instance(); 772 name = k->name(); 773 } 774 if (name == NULL) { 775 st->print("<null>"); 776 return; 777 } 778 if (is_instance) st->print("L"); 779 st->write((char*) name->base(), (int) name->utf8_length()); 780 if (is_instance) st->print(";"); 781 } 782 783 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) { 784 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 785 Symbol* name; 786 if (is_primitive(java_class)) { 787 name = vmSymbols::type_signature(primitive_type(java_class)); 788 // Because this can create a new symbol, the caller has to decrement 789 // the refcount, so make adjustment here and below for symbols returned 790 // that are not created or incremented due to a successful lookup. 791 name->increment_refcount(); 792 } else { 793 Klass* k = as_Klass(java_class); 794 if (!k->oop_is_instance()) { 795 name = k->name(); 796 name->increment_refcount(); 797 } else { 798 ResourceMark rm; 799 const char* sigstr = k->signature_name(); 800 int siglen = (int) strlen(sigstr); 801 if (!intern_if_not_found) { 802 name = SymbolTable::probe(sigstr, siglen); 803 } else { 804 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 805 } 806 } 807 } 808 return name; 809 } 810 811 812 Klass* java_lang_Class::array_klass(oop java_class) { 813 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset)); 814 assert(k == NULL || k->is_klass() && k->oop_is_array(), "should be array klass"); 815 return k; 816 } 817 818 819 void java_lang_Class::set_array_klass(oop java_class, Klass* klass) { 820 assert(klass->is_klass() && klass->oop_is_array(), "should be array klass"); 821 java_class->metadata_field_put(_array_klass_offset, klass); 822 } 823 824 825 bool java_lang_Class::is_primitive(oop java_class) { 826 // should assert: 827 //assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 828 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL); 829 830 #ifdef ASSERT 831 if (is_primitive) { 832 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset)); 833 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()), 834 "Should be either the T_VOID primitive or a java primitive"); 835 } 836 #endif 837 838 return is_primitive; 839 } 840 841 842 BasicType java_lang_Class::primitive_type(oop java_class) { 843 assert(java_lang_Class::is_primitive(java_class), "just checking"); 844 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset)); 845 BasicType type = T_VOID; 846 if (ak != NULL) { 847 // Note: create_basic_type_mirror above initializes ak to a non-null value. 848 type = ArrayKlass::cast(ak)->element_type(); 849 } else { 850 assert(java_class == Universe::void_mirror(), "only valid non-array primitive"); 851 } 852 assert(Universe::java_mirror(type) == java_class, "must be consistent"); 853 return type; 854 } 855 856 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) { 857 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 858 if (is_primitive(java_class)) { 859 if (reference_klass != NULL) 860 (*reference_klass) = NULL; 861 return primitive_type(java_class); 862 } else { 863 if (reference_klass != NULL) 864 (*reference_klass) = as_Klass(java_class); 865 return T_OBJECT; 866 } 867 } 868 869 870 oop java_lang_Class::primitive_mirror(BasicType t) { 871 oop mirror = Universe::java_mirror(t); 872 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class"); 873 assert(java_lang_Class::is_primitive(mirror), "must be primitive"); 874 return mirror; 875 } 876 877 bool java_lang_Class::offsets_computed = false; 878 int java_lang_Class::classRedefinedCount_offset = -1; 879 880 void java_lang_Class::compute_offsets() { 881 assert(!offsets_computed, "offsets should be initialized only once"); 882 offsets_computed = true; 883 884 Klass* k = SystemDictionary::Class_klass(); 885 // The classRedefinedCount field is only present starting in 1.5, 886 // so don't go fatal. 887 compute_optional_offset(classRedefinedCount_offset, 888 k, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature()); 889 890 // Needs to be optional because the old build runs Queens during bootstrapping 891 // and jdk8-9 doesn't have coordinated pushes yet. 892 compute_optional_offset(_class_loader_offset, 893 k, vmSymbols::classLoader_name(), 894 vmSymbols::classloader_signature()); 895 896 compute_offset(_component_mirror_offset, 897 k, vmSymbols::componentType_name(), 898 vmSymbols::class_signature()); 899 900 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have 901 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops 902 // GC treats them the same. 903 _init_lock_offset = _component_mirror_offset; 904 905 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 906 } 907 908 int java_lang_Class::classRedefinedCount(oop the_class_mirror) { 909 if (classRedefinedCount_offset == -1) { 910 // If we don't have an offset for it then just return -1 as a marker. 911 return -1; 912 } 913 914 return the_class_mirror->int_field(classRedefinedCount_offset); 915 } 916 917 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) { 918 if (classRedefinedCount_offset == -1) { 919 // If we don't have an offset for it then nothing to set. 920 return; 921 } 922 923 the_class_mirror->int_field_put(classRedefinedCount_offset, value); 924 } 925 926 927 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the 928 // platform thread structure, and a eetop offset which was used for thread 929 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures 930 // merged, so in the HotSpot VM we just use the eetop field for the thread 931 // instead of the privateInfo_offset. 932 // 933 // Note: The stackSize field is only present starting in 1.4. 934 935 int java_lang_Thread::_name_offset = 0; 936 int java_lang_Thread::_group_offset = 0; 937 int java_lang_Thread::_contextClassLoader_offset = 0; 938 int java_lang_Thread::_inheritedAccessControlContext_offset = 0; 939 int java_lang_Thread::_priority_offset = 0; 940 int java_lang_Thread::_eetop_offset = 0; 941 int java_lang_Thread::_daemon_offset = 0; 942 int java_lang_Thread::_stillborn_offset = 0; 943 int java_lang_Thread::_stackSize_offset = 0; 944 int java_lang_Thread::_tid_offset = 0; 945 int java_lang_Thread::_thread_status_offset = 0; 946 int java_lang_Thread::_park_blocker_offset = 0; 947 int java_lang_Thread::_park_event_offset = 0 ; 948 949 950 void java_lang_Thread::compute_offsets() { 951 assert(_group_offset == 0, "offsets should be initialized only once"); 952 953 Klass* k = SystemDictionary::Thread_klass(); 954 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 955 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature()); 956 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature()); 957 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature()); 958 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature()); 959 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature()); 960 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature()); 961 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature()); 962 // The stackSize field is only present starting in 1.4, so don't go fatal. 963 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature()); 964 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal. 965 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature()); 966 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature()); 967 // The parkBlocker field is only present starting in 1.6, so don't go fatal. 968 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature()); 969 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(), 970 vmSymbols::long_signature()); 971 } 972 973 974 JavaThread* java_lang_Thread::thread(oop java_thread) { 975 return (JavaThread*)java_thread->address_field(_eetop_offset); 976 } 977 978 979 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) { 980 java_thread->address_field_put(_eetop_offset, (address)thread); 981 } 982 983 984 oop java_lang_Thread::name(oop java_thread) { 985 return java_thread->obj_field(_name_offset); 986 } 987 988 989 void java_lang_Thread::set_name(oop java_thread, oop name) { 990 java_thread->obj_field_put(_name_offset, name); 991 } 992 993 994 ThreadPriority java_lang_Thread::priority(oop java_thread) { 995 return (ThreadPriority)java_thread->int_field(_priority_offset); 996 } 997 998 999 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) { 1000 java_thread->int_field_put(_priority_offset, priority); 1001 } 1002 1003 1004 oop java_lang_Thread::threadGroup(oop java_thread) { 1005 return java_thread->obj_field(_group_offset); 1006 } 1007 1008 1009 bool java_lang_Thread::is_stillborn(oop java_thread) { 1010 return java_thread->bool_field(_stillborn_offset) != 0; 1011 } 1012 1013 1014 // We never have reason to turn the stillborn bit off 1015 void java_lang_Thread::set_stillborn(oop java_thread) { 1016 java_thread->bool_field_put(_stillborn_offset, true); 1017 } 1018 1019 1020 bool java_lang_Thread::is_alive(oop java_thread) { 1021 JavaThread* thr = java_lang_Thread::thread(java_thread); 1022 return (thr != NULL); 1023 } 1024 1025 1026 bool java_lang_Thread::is_daemon(oop java_thread) { 1027 return java_thread->bool_field(_daemon_offset) != 0; 1028 } 1029 1030 1031 void java_lang_Thread::set_daemon(oop java_thread) { 1032 java_thread->bool_field_put(_daemon_offset, true); 1033 } 1034 1035 oop java_lang_Thread::context_class_loader(oop java_thread) { 1036 return java_thread->obj_field(_contextClassLoader_offset); 1037 } 1038 1039 oop java_lang_Thread::inherited_access_control_context(oop java_thread) { 1040 return java_thread->obj_field(_inheritedAccessControlContext_offset); 1041 } 1042 1043 1044 jlong java_lang_Thread::stackSize(oop java_thread) { 1045 if (_stackSize_offset > 0) { 1046 return java_thread->long_field(_stackSize_offset); 1047 } else { 1048 return 0; 1049 } 1050 } 1051 1052 // Write the thread status value to threadStatus field in java.lang.Thread java class. 1053 void java_lang_Thread::set_thread_status(oop java_thread, 1054 java_lang_Thread::ThreadStatus status) { 1055 // The threadStatus is only present starting in 1.5 1056 if (_thread_status_offset > 0) { 1057 java_thread->int_field_put(_thread_status_offset, status); 1058 } 1059 } 1060 1061 // Read thread status value from threadStatus field in java.lang.Thread java class. 1062 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) { 1063 assert(Thread::current()->is_Watcher_thread() || Thread::current()->is_VM_thread() || 1064 JavaThread::current()->thread_state() == _thread_in_vm, 1065 "Java Thread is not running in vm"); 1066 // The threadStatus is only present starting in 1.5 1067 if (_thread_status_offset > 0) { 1068 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1069 } else { 1070 // All we can easily figure out is if it is alive, but that is 1071 // enough info for a valid unknown status. 1072 // These aren't restricted to valid set ThreadStatus values, so 1073 // use JVMTI values and cast. 1074 JavaThread* thr = java_lang_Thread::thread(java_thread); 1075 if (thr == NULL) { 1076 // the thread hasn't run yet or is in the process of exiting 1077 return NEW; 1078 } 1079 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE; 1080 } 1081 } 1082 1083 1084 jlong java_lang_Thread::thread_id(oop java_thread) { 1085 // The thread ID field is only present starting in 1.5 1086 if (_tid_offset > 0) { 1087 return java_thread->long_field(_tid_offset); 1088 } else { 1089 return 0; 1090 } 1091 } 1092 1093 oop java_lang_Thread::park_blocker(oop java_thread) { 1094 assert(JDK_Version::current().supports_thread_park_blocker() && 1095 _park_blocker_offset != 0, "Must support parkBlocker field"); 1096 1097 if (_park_blocker_offset > 0) { 1098 return java_thread->obj_field(_park_blocker_offset); 1099 } 1100 1101 return NULL; 1102 } 1103 1104 jlong java_lang_Thread::park_event(oop java_thread) { 1105 if (_park_event_offset > 0) { 1106 return java_thread->long_field(_park_event_offset); 1107 } 1108 return 0; 1109 } 1110 1111 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) { 1112 if (_park_event_offset > 0) { 1113 java_thread->long_field_put(_park_event_offset, ptr); 1114 return true; 1115 } 1116 return false; 1117 } 1118 1119 1120 const char* java_lang_Thread::thread_status_name(oop java_thread) { 1121 assert(_thread_status_offset != 0, "Must have thread status"); 1122 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1123 switch (status) { 1124 case NEW : return "NEW"; 1125 case RUNNABLE : return "RUNNABLE"; 1126 case SLEEPING : return "TIMED_WAITING (sleeping)"; 1127 case IN_OBJECT_WAIT : return "WAITING (on object monitor)"; 1128 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)"; 1129 case PARKED : return "WAITING (parking)"; 1130 case PARKED_TIMED : return "TIMED_WAITING (parking)"; 1131 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)"; 1132 case TERMINATED : return "TERMINATED"; 1133 default : return "UNKNOWN"; 1134 }; 1135 } 1136 int java_lang_ThreadGroup::_parent_offset = 0; 1137 int java_lang_ThreadGroup::_name_offset = 0; 1138 int java_lang_ThreadGroup::_threads_offset = 0; 1139 int java_lang_ThreadGroup::_groups_offset = 0; 1140 int java_lang_ThreadGroup::_maxPriority_offset = 0; 1141 int java_lang_ThreadGroup::_destroyed_offset = 0; 1142 int java_lang_ThreadGroup::_daemon_offset = 0; 1143 int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0; 1144 int java_lang_ThreadGroup::_nthreads_offset = 0; 1145 int java_lang_ThreadGroup::_ngroups_offset = 0; 1146 1147 oop java_lang_ThreadGroup::parent(oop java_thread_group) { 1148 assert(java_thread_group->is_oop(), "thread group must be oop"); 1149 return java_thread_group->obj_field(_parent_offset); 1150 } 1151 1152 // ("name as oop" accessor is not necessary) 1153 1154 typeArrayOop java_lang_ThreadGroup::name(oop java_thread_group) { 1155 oop name = java_thread_group->obj_field(_name_offset); 1156 // ThreadGroup.name can be null 1157 return name == NULL ? (typeArrayOop)NULL : java_lang_String::value(name); 1158 } 1159 1160 int java_lang_ThreadGroup::nthreads(oop java_thread_group) { 1161 assert(java_thread_group->is_oop(), "thread group must be oop"); 1162 return java_thread_group->int_field(_nthreads_offset); 1163 } 1164 1165 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) { 1166 oop threads = java_thread_group->obj_field(_threads_offset); 1167 assert(threads != NULL, "threadgroups should have threads"); 1168 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code 1169 return objArrayOop(threads); 1170 } 1171 1172 int java_lang_ThreadGroup::ngroups(oop java_thread_group) { 1173 assert(java_thread_group->is_oop(), "thread group must be oop"); 1174 return java_thread_group->int_field(_ngroups_offset); 1175 } 1176 1177 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) { 1178 oop groups = java_thread_group->obj_field(_groups_offset); 1179 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code 1180 return objArrayOop(groups); 1181 } 1182 1183 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) { 1184 assert(java_thread_group->is_oop(), "thread group must be oop"); 1185 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset); 1186 } 1187 1188 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) { 1189 assert(java_thread_group->is_oop(), "thread group must be oop"); 1190 return java_thread_group->bool_field(_destroyed_offset) != 0; 1191 } 1192 1193 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) { 1194 assert(java_thread_group->is_oop(), "thread group must be oop"); 1195 return java_thread_group->bool_field(_daemon_offset) != 0; 1196 } 1197 1198 bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) { 1199 assert(java_thread_group->is_oop(), "thread group must be oop"); 1200 return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0; 1201 } 1202 1203 void java_lang_ThreadGroup::compute_offsets() { 1204 assert(_parent_offset == 0, "offsets should be initialized only once"); 1205 1206 Klass* k = SystemDictionary::ThreadGroup_klass(); 1207 1208 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature()); 1209 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1210 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature()); 1211 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature()); 1212 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature()); 1213 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature()); 1214 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature()); 1215 compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature()); 1216 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature()); 1217 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature()); 1218 } 1219 1220 oop java_lang_Throwable::unassigned_stacktrace() { 1221 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Throwable_klass()); 1222 address addr = ik->static_field_addr(static_unassigned_stacktrace_offset); 1223 if (UseCompressedOops) { 1224 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 1225 } else { 1226 return oopDesc::load_decode_heap_oop((oop*)addr); 1227 } 1228 } 1229 1230 oop java_lang_Throwable::backtrace(oop throwable) { 1231 return throwable->obj_field_acquire(backtrace_offset); 1232 } 1233 1234 1235 void java_lang_Throwable::set_backtrace(oop throwable, oop value) { 1236 throwable->release_obj_field_put(backtrace_offset, value); 1237 } 1238 1239 1240 oop java_lang_Throwable::message(oop throwable) { 1241 return throwable->obj_field(detailMessage_offset); 1242 } 1243 1244 1245 oop java_lang_Throwable::message(Handle throwable) { 1246 return throwable->obj_field(detailMessage_offset); 1247 } 1248 1249 1250 // Return Symbol for detailed_message or NULL 1251 Symbol* java_lang_Throwable::detail_message(oop throwable) { 1252 PRESERVE_EXCEPTION_MARK; // Keep original exception 1253 oop detailed_message = java_lang_Throwable::message(throwable); 1254 if (detailed_message != NULL) { 1255 return java_lang_String::as_symbol(detailed_message, THREAD); 1256 } 1257 return NULL; 1258 } 1259 1260 void java_lang_Throwable::set_message(oop throwable, oop value) { 1261 throwable->obj_field_put(detailMessage_offset, value); 1262 } 1263 1264 1265 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) { 1266 throwable->obj_field_put(stackTrace_offset, st_element_array); 1267 } 1268 1269 void java_lang_Throwable::clear_stacktrace(oop throwable) { 1270 set_stacktrace(throwable, NULL); 1271 } 1272 1273 1274 void java_lang_Throwable::print(oop throwable, outputStream* st) { 1275 ResourceMark rm; 1276 Klass* k = throwable->klass(); 1277 assert(k != NULL, "just checking"); 1278 st->print("%s", InstanceKlass::cast(k)->external_name()); 1279 oop msg = message(throwable); 1280 if (msg != NULL) { 1281 st->print(": %s", java_lang_String::as_utf8_string(msg)); 1282 } 1283 } 1284 1285 1286 void java_lang_Throwable::print(Handle throwable, outputStream* st) { 1287 ResourceMark rm; 1288 Klass* k = throwable->klass(); 1289 assert(k != NULL, "just checking"); 1290 st->print("%s", InstanceKlass::cast(k)->external_name()); 1291 oop msg = message(throwable); 1292 if (msg != NULL) { 1293 st->print(": %s", java_lang_String::as_utf8_string(msg)); 1294 } 1295 } 1296 1297 // After this many redefines, the stack trace is unreliable. 1298 const int MAX_VERSION = USHRT_MAX; 1299 1300 // Helper backtrace functions to store bci|version together. 1301 static inline int merge_bci_and_version(int bci, int version) { 1302 // only store u2 for version, checking for overflow. 1303 if (version > USHRT_MAX || version < 0) version = MAX_VERSION; 1304 assert((jushort)bci == bci, "bci should be short"); 1305 return build_int_from_shorts(version, bci); 1306 } 1307 1308 static inline int bci_at(unsigned int merged) { 1309 return extract_high_short_from_int(merged); 1310 } 1311 static inline int version_at(unsigned int merged) { 1312 return extract_low_short_from_int(merged); 1313 } 1314 1315 static inline bool version_matches(Method* method, int version) { 1316 assert(version < MAX_VERSION, "version is too big"); 1317 return method != NULL && (method->constants()->version() == version); 1318 } 1319 1320 static inline int get_line_number(Method* method, int bci) { 1321 int line_number = 0; 1322 if (method->is_native()) { 1323 // Negative value different from -1 below, enabling Java code in 1324 // class java.lang.StackTraceElement to distinguish "native" from 1325 // "no LineNumberTable". JDK tests for -2. 1326 line_number = -2; 1327 } else { 1328 // Returns -1 if no LineNumberTable, and otherwise actual line number 1329 line_number = method->line_number_from_bci(bci); 1330 if (line_number == -1 && ShowHiddenFrames) { 1331 line_number = bci + 1000000; 1332 } 1333 } 1334 return line_number; 1335 } 1336 1337 // This class provides a simple wrapper over the internal structure of 1338 // exception backtrace to insulate users of the backtrace from needing 1339 // to know what it looks like. 1340 class BacktraceBuilder: public StackObj { 1341 private: 1342 Handle _backtrace; 1343 objArrayOop _head; 1344 typeArrayOop _methods; 1345 typeArrayOop _bcis; 1346 objArrayOop _mirrors; 1347 typeArrayOop _cprefs; // needed to insulate method name against redefinition 1348 int _index; 1349 No_Safepoint_Verifier _nsv; 1350 1351 public: 1352 1353 enum { 1354 trace_methods_offset = java_lang_Throwable::trace_methods_offset, 1355 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset, 1356 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset, 1357 trace_cprefs_offset = java_lang_Throwable::trace_cprefs_offset, 1358 trace_next_offset = java_lang_Throwable::trace_next_offset, 1359 trace_size = java_lang_Throwable::trace_size, 1360 trace_chunk_size = java_lang_Throwable::trace_chunk_size 1361 }; 1362 1363 // get info out of chunks 1364 static typeArrayOop get_methods(objArrayHandle chunk) { 1365 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset)); 1366 assert(methods != NULL, "method array should be initialized in backtrace"); 1367 return methods; 1368 } 1369 static typeArrayOop get_bcis(objArrayHandle chunk) { 1370 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 1371 assert(bcis != NULL, "bci array should be initialized in backtrace"); 1372 return bcis; 1373 } 1374 static objArrayOop get_mirrors(objArrayHandle chunk) { 1375 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset)); 1376 assert(mirrors != NULL, "mirror array should be initialized in backtrace"); 1377 return mirrors; 1378 } 1379 static typeArrayOop get_cprefs(objArrayHandle chunk) { 1380 typeArrayOop cprefs = typeArrayOop(chunk->obj_at(trace_cprefs_offset)); 1381 assert(cprefs != NULL, "cprefs array should be initialized in backtrace"); 1382 return cprefs; 1383 } 1384 1385 // constructor for new backtrace 1386 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL), _cprefs(NULL) { 1387 expand(CHECK); 1388 _backtrace = _head; 1389 _index = 0; 1390 } 1391 1392 BacktraceBuilder(objArrayHandle backtrace) { 1393 _methods = get_methods(backtrace); 1394 _bcis = get_bcis(backtrace); 1395 _mirrors = get_mirrors(backtrace); 1396 _cprefs = get_cprefs(backtrace); 1397 assert(_methods->length() == _bcis->length() && 1398 _methods->length() == _mirrors->length(), 1399 "method and source information arrays should match"); 1400 1401 // head is the preallocated backtrace 1402 _backtrace = _head = backtrace(); 1403 _index = 0; 1404 } 1405 1406 void expand(TRAPS) { 1407 objArrayHandle old_head(THREAD, _head); 1408 Pause_No_Safepoint_Verifier pnsv(&_nsv); 1409 1410 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK); 1411 objArrayHandle new_head(THREAD, head); 1412 1413 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK); 1414 typeArrayHandle new_methods(THREAD, methods); 1415 1416 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK); 1417 typeArrayHandle new_bcis(THREAD, bcis); 1418 1419 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK); 1420 objArrayHandle new_mirrors(THREAD, mirrors); 1421 1422 typeArrayOop cprefs = oopFactory::new_shortArray(trace_chunk_size, CHECK); 1423 typeArrayHandle new_cprefs(THREAD, cprefs); 1424 1425 if (!old_head.is_null()) { 1426 old_head->obj_at_put(trace_next_offset, new_head()); 1427 } 1428 new_head->obj_at_put(trace_methods_offset, new_methods()); 1429 new_head->obj_at_put(trace_bcis_offset, new_bcis()); 1430 new_head->obj_at_put(trace_mirrors_offset, new_mirrors()); 1431 new_head->obj_at_put(trace_cprefs_offset, new_cprefs()); 1432 1433 _head = new_head(); 1434 _methods = new_methods(); 1435 _bcis = new_bcis(); 1436 _mirrors = new_mirrors(); 1437 _cprefs = new_cprefs(); 1438 _index = 0; 1439 } 1440 1441 oop backtrace() { 1442 return _backtrace(); 1443 } 1444 1445 inline void push(Method* method, int bci, TRAPS) { 1446 // Smear the -1 bci to 0 since the array only holds unsigned 1447 // shorts. The later line number lookup would just smear the -1 1448 // to a 0 even if it could be recorded. 1449 if (bci == SynchronizationEntryBCI) bci = 0; 1450 1451 if (_index >= trace_chunk_size) { 1452 methodHandle mhandle(THREAD, method); 1453 expand(CHECK); 1454 method = mhandle(); 1455 } 1456 1457 _methods->short_at_put(_index, method->orig_method_idnum()); 1458 _bcis->int_at_put(_index, merge_bci_and_version(bci, method->constants()->version())); 1459 _cprefs->short_at_put(_index, method->name_index()); 1460 1461 // We need to save the mirrors in the backtrace to keep the class 1462 // from being unloaded while we still have this stack trace. 1463 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror"); 1464 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror()); 1465 _index++; 1466 } 1467 1468 }; 1469 1470 // Print stack trace element to resource allocated buffer 1471 char* java_lang_Throwable::print_stack_element_to_buffer(Handle mirror, 1472 int method_id, int version, int bci, int cpref) { 1473 1474 // Get strings and string lengths 1475 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 1476 const char* klass_name = holder->external_name(); 1477 int buf_len = (int)strlen(klass_name); 1478 1479 Method* method = holder->method_with_orig_idnum(method_id, version); 1480 1481 // The method can be NULL if the requested class version is gone 1482 Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref); 1483 char* method_name = sym->as_C_string(); 1484 buf_len += (int)strlen(method_name); 1485 1486 // Use specific ik version as a holder since the mirror might 1487 // refer to version that is now obsolete and no longer accessible 1488 // via the previous versions list. 1489 holder = holder->get_klass_version(version); 1490 char* source_file_name = NULL; 1491 if (holder != NULL) { 1492 Symbol* source = holder->source_file_name(); 1493 if (source != NULL) { 1494 source_file_name = source->as_C_string(); 1495 buf_len += (int)strlen(source_file_name); 1496 } 1497 } 1498 1499 // Allocate temporary buffer with extra space for formatting and line number 1500 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64); 1501 1502 // Print stack trace line in buffer 1503 sprintf(buf, "\tat %s.%s", klass_name, method_name); 1504 1505 if (!version_matches(method, version)) { 1506 strcat(buf, "(Redefined)"); 1507 } else { 1508 int line_number = get_line_number(method, bci); 1509 if (line_number == -2) { 1510 strcat(buf, "(Native Method)"); 1511 } else { 1512 if (source_file_name != NULL && (line_number != -1)) { 1513 // Sourcename and linenumber 1514 sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number); 1515 } else if (source_file_name != NULL) { 1516 // Just sourcename 1517 sprintf(buf + (int)strlen(buf), "(%s)", source_file_name); 1518 } else { 1519 // Neither sourcename nor linenumber 1520 sprintf(buf + (int)strlen(buf), "(Unknown Source)"); 1521 } 1522 nmethod* nm = method->code(); 1523 if (WizardMode && nm != NULL) { 1524 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm); 1525 } 1526 } 1527 } 1528 1529 return buf; 1530 } 1531 1532 void java_lang_Throwable::print_stack_element(outputStream *st, Handle mirror, 1533 int method_id, int version, int bci, int cpref) { 1534 ResourceMark rm; 1535 char* buf = print_stack_element_to_buffer(mirror, method_id, version, bci, cpref); 1536 st->print_cr("%s", buf); 1537 } 1538 1539 void java_lang_Throwable::print_stack_element(outputStream *st, methodHandle method, int bci) { 1540 Handle mirror = method->method_holder()->java_mirror(); 1541 int method_id = method->orig_method_idnum(); 1542 int version = method->constants()->version(); 1543 int cpref = method->name_index(); 1544 print_stack_element(st, mirror, method_id, version, bci, cpref); 1545 } 1546 1547 const char* java_lang_Throwable::no_stack_trace_message() { 1548 return "\t<<no stack trace available>>"; 1549 } 1550 1551 1552 // Currently used only for exceptions occurring during startup 1553 void java_lang_Throwable::print_stack_trace(oop throwable, outputStream* st) { 1554 Thread *THREAD = Thread::current(); 1555 Handle h_throwable(THREAD, throwable); 1556 while (h_throwable.not_null()) { 1557 objArrayHandle result (THREAD, objArrayOop(backtrace(h_throwable()))); 1558 if (result.is_null()) { 1559 st->print_cr("%s", no_stack_trace_message()); 1560 return; 1561 } 1562 1563 while (result.not_null()) { 1564 1565 // Get method id, bci, version and mirror from chunk 1566 typeArrayHandle methods (THREAD, BacktraceBuilder::get_methods(result)); 1567 typeArrayHandle bcis (THREAD, BacktraceBuilder::get_bcis(result)); 1568 objArrayHandle mirrors (THREAD, BacktraceBuilder::get_mirrors(result)); 1569 typeArrayHandle cprefs (THREAD, BacktraceBuilder::get_cprefs(result)); 1570 1571 int length = methods()->length(); 1572 for (int index = 0; index < length; index++) { 1573 Handle mirror(THREAD, mirrors->obj_at(index)); 1574 // NULL mirror means end of stack trace 1575 if (mirror.is_null()) goto handle_cause; 1576 int method = methods->short_at(index); 1577 int version = version_at(bcis->int_at(index)); 1578 int bci = bci_at(bcis->int_at(index)); 1579 int cpref = cprefs->short_at(index); 1580 print_stack_element(st, mirror, method, version, bci, cpref); 1581 } 1582 result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset))); 1583 } 1584 handle_cause: 1585 { 1586 EXCEPTION_MARK; 1587 JavaValue cause(T_OBJECT); 1588 JavaCalls::call_virtual(&cause, 1589 h_throwable, 1590 KlassHandle(THREAD, h_throwable->klass()), 1591 vmSymbols::getCause_name(), 1592 vmSymbols::void_throwable_signature(), 1593 THREAD); 1594 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 1595 if (HAS_PENDING_EXCEPTION) { 1596 CLEAR_PENDING_EXCEPTION; 1597 h_throwable = Handle(); 1598 } else { 1599 h_throwable = Handle(THREAD, (oop) cause.get_jobject()); 1600 if (h_throwable.not_null()) { 1601 st->print("Caused by: "); 1602 print(h_throwable, st); 1603 st->cr(); 1604 } 1605 } 1606 } 1607 } 1608 } 1609 1610 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS) { 1611 if (!StackTraceInThrowable) return; 1612 ResourceMark rm(THREAD); 1613 1614 // Start out by clearing the backtrace for this object, in case the VM 1615 // runs out of memory while allocating the stack trace 1616 set_backtrace(throwable(), NULL); 1617 // Clear lazily constructed Java level stacktrace if refilling occurs 1618 // This is unnecessary in 1.7+ but harmless 1619 clear_stacktrace(throwable()); 1620 1621 int max_depth = MaxJavaStackTraceDepth; 1622 JavaThread* thread = (JavaThread*)THREAD; 1623 BacktraceBuilder bt(CHECK); 1624 1625 // If there is no Java frame just return the method that was being called 1626 // with bci 0 1627 if (!thread->has_last_Java_frame()) { 1628 if (max_depth >= 1 && method() != NULL) { 1629 bt.push(method(), 0, CHECK); 1630 set_backtrace(throwable(), bt.backtrace()); 1631 } 1632 return; 1633 } 1634 1635 // Instead of using vframe directly, this version of fill_in_stack_trace 1636 // basically handles everything by hand. This significantly improved the 1637 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows. 1638 // See bug 6333838 for more details. 1639 // The "ASSERT" here is to verify this method generates the exactly same stack 1640 // trace as utilizing vframe. 1641 #ifdef ASSERT 1642 vframeStream st(thread); 1643 methodHandle st_method(THREAD, st.method()); 1644 #endif 1645 int total_count = 0; 1646 RegisterMap map(thread, false); 1647 int decode_offset = 0; 1648 nmethod* nm = NULL; 1649 bool skip_fillInStackTrace_check = false; 1650 bool skip_throwableInit_check = false; 1651 bool skip_hidden = !ShowHiddenFrames; 1652 1653 for (frame fr = thread->last_frame(); max_depth != total_count;) { 1654 Method* method = NULL; 1655 int bci = 0; 1656 1657 // Compiled java method case. 1658 if (decode_offset != 0) { 1659 DebugInfoReadStream stream(nm, decode_offset); 1660 decode_offset = stream.read_int(); 1661 method = (Method*)nm->metadata_at(stream.read_int()); 1662 bci = stream.read_bci(); 1663 } else { 1664 if (fr.is_first_frame()) break; 1665 address pc = fr.pc(); 1666 if (fr.is_interpreted_frame()) { 1667 address bcp = fr.interpreter_frame_bcp(); 1668 method = fr.interpreter_frame_method(); 1669 bci = method->bci_from(bcp); 1670 fr = fr.sender(&map); 1671 } else { 1672 CodeBlob* cb = fr.cb(); 1673 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL 1674 // but non nmethod 1675 fr = fr.sender(&map); 1676 if (cb == NULL || !cb->is_nmethod()) { 1677 continue; 1678 } 1679 nm = (nmethod*)cb; 1680 if (nm->method()->is_native()) { 1681 method = nm->method(); 1682 bci = 0; 1683 } else { 1684 PcDesc* pd = nm->pc_desc_at(pc); 1685 decode_offset = pd->scope_decode_offset(); 1686 // if decode_offset is not equal to 0, it will execute the 1687 // "compiled java method case" at the beginning of the loop. 1688 continue; 1689 } 1690 } 1691 } 1692 #ifdef ASSERT 1693 assert(st_method() == method && st.bci() == bci, 1694 "Wrong stack trace"); 1695 st.next(); 1696 // vframeStream::method isn't GC-safe so store off a copy 1697 // of the Method* in case we GC. 1698 if (!st.at_end()) { 1699 st_method = st.method(); 1700 } 1701 #endif 1702 1703 // the format of the stacktrace will be: 1704 // - 1 or more fillInStackTrace frames for the exception class (skipped) 1705 // - 0 or more <init> methods for the exception class (skipped) 1706 // - rest of the stack 1707 1708 if (!skip_fillInStackTrace_check) { 1709 if ((method->name() == vmSymbols::fillInStackTrace_name() || 1710 method->name() == vmSymbols::fillInStackTrace0_name()) && 1711 throwable->is_a(method->method_holder())) { 1712 continue; 1713 } 1714 else { 1715 skip_fillInStackTrace_check = true; // gone past them all 1716 } 1717 } 1718 if (!skip_throwableInit_check) { 1719 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering"); 1720 1721 // skip <init> methods of the exception class and superclasses 1722 // This is simlar to classic VM. 1723 if (method->name() == vmSymbols::object_initializer_name() && 1724 throwable->is_a(method->method_holder())) { 1725 continue; 1726 } else { 1727 // there are none or we've seen them all - either way stop checking 1728 skip_throwableInit_check = true; 1729 } 1730 } 1731 if (method->is_hidden()) { 1732 if (skip_hidden) continue; 1733 } 1734 bt.push(method, bci, CHECK); 1735 total_count++; 1736 } 1737 1738 // Put completed stack trace into throwable object 1739 set_backtrace(throwable(), bt.backtrace()); 1740 } 1741 1742 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method) { 1743 // No-op if stack trace is disabled 1744 if (!StackTraceInThrowable) { 1745 return; 1746 } 1747 1748 // Disable stack traces for some preallocated out of memory errors 1749 if (!Universe::should_fill_in_stack_trace(throwable)) { 1750 return; 1751 } 1752 1753 PRESERVE_EXCEPTION_MARK; 1754 1755 JavaThread* thread = JavaThread::active(); 1756 fill_in_stack_trace(throwable, method, thread); 1757 // ignore exceptions thrown during stack trace filling 1758 CLEAR_PENDING_EXCEPTION; 1759 } 1760 1761 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 1762 // Allocate stack trace - backtrace is created but not filled in 1763 1764 // No-op if stack trace is disabled 1765 if (!StackTraceInThrowable) return; 1766 BacktraceBuilder bt(CHECK); // creates a backtrace 1767 set_backtrace(throwable(), bt.backtrace()); 1768 } 1769 1770 1771 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 1772 // Fill in stack trace into preallocated backtrace (no GC) 1773 1774 // No-op if stack trace is disabled 1775 if (!StackTraceInThrowable) return; 1776 1777 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check"); 1778 1779 JavaThread* THREAD = JavaThread::current(); 1780 1781 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable())); 1782 assert(backtrace.not_null(), "backtrace should have been preallocated"); 1783 1784 ResourceMark rm(THREAD); 1785 vframeStream st(THREAD); 1786 1787 BacktraceBuilder bt(backtrace); 1788 1789 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 1790 // methods as preallocated errors aren't created by "java" code. 1791 1792 // fill in as much stack trace as possible 1793 typeArrayOop methods = BacktraceBuilder::get_methods(backtrace); 1794 int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth); 1795 int chunk_count = 0; 1796 1797 for (;!st.at_end(); st.next()) { 1798 bt.push(st.method(), st.bci(), CHECK); 1799 chunk_count++; 1800 1801 // Bail-out for deep stacks 1802 if (chunk_count >= max_chunks) break; 1803 } 1804 1805 // We support the Throwable immutability protocol defined for Java 7. 1806 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace()); 1807 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized"); 1808 } 1809 1810 1811 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) { 1812 if (throwable == NULL) { 1813 THROW_0(vmSymbols::java_lang_NullPointerException()); 1814 } 1815 objArrayOop chunk = objArrayOop(backtrace(throwable)); 1816 int depth = 0; 1817 if (chunk != NULL) { 1818 // Iterate over chunks and count full ones 1819 while (true) { 1820 objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset)); 1821 if (next == NULL) break; 1822 depth += trace_chunk_size; 1823 chunk = next; 1824 } 1825 assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check"); 1826 // Count element in remaining partial chunk. NULL value for mirror 1827 // marks the end of the stack trace elements that are saved. 1828 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk); 1829 assert(mirrors != NULL, "sanity check"); 1830 for (int i = 0; i < mirrors->length(); i++) { 1831 if (mirrors->obj_at(i) == NULL) break; 1832 depth++; 1833 } 1834 } 1835 return depth; 1836 } 1837 1838 1839 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) { 1840 if (throwable == NULL) { 1841 THROW_0(vmSymbols::java_lang_NullPointerException()); 1842 } 1843 if (index < 0) { 1844 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 1845 } 1846 // Compute how many chunks to skip and index into actual chunk 1847 objArrayOop chunk = objArrayOop(backtrace(throwable)); 1848 int skip_chunks = index / trace_chunk_size; 1849 int chunk_index = index % trace_chunk_size; 1850 while (chunk != NULL && skip_chunks > 0) { 1851 chunk = objArrayOop(chunk->obj_at(trace_next_offset)); 1852 skip_chunks--; 1853 } 1854 if (chunk == NULL) { 1855 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 1856 } 1857 // Get method id, bci, version, mirror and cpref from chunk 1858 typeArrayOop methods = BacktraceBuilder::get_methods(chunk); 1859 typeArrayOop bcis = BacktraceBuilder::get_bcis(chunk); 1860 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk); 1861 typeArrayOop cprefs = BacktraceBuilder::get_cprefs(chunk); 1862 1863 assert(methods != NULL && bcis != NULL && mirrors != NULL, "sanity check"); 1864 1865 int method = methods->short_at(chunk_index); 1866 int version = version_at(bcis->int_at(chunk_index)); 1867 int bci = bci_at(bcis->int_at(chunk_index)); 1868 int cpref = cprefs->short_at(chunk_index); 1869 Handle mirror(THREAD, mirrors->obj_at(chunk_index)); 1870 1871 // Chunk can be partial full 1872 if (mirror.is_null()) { 1873 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 1874 } 1875 oop element = java_lang_StackTraceElement::create(mirror, method, version, bci, cpref, CHECK_0); 1876 return element; 1877 } 1878 1879 oop java_lang_StackTraceElement::create(Handle mirror, int method_id, 1880 int version, int bci, int cpref, TRAPS) { 1881 // Allocate java.lang.StackTraceElement instance 1882 Klass* k = SystemDictionary::StackTraceElement_klass(); 1883 assert(k != NULL, "must be loaded in 1.4+"); 1884 instanceKlassHandle ik (THREAD, k); 1885 if (ik->should_be_initialized()) { 1886 ik->initialize(CHECK_0); 1887 } 1888 1889 Handle element = ik->allocate_instance_handle(CHECK_0); 1890 // Fill in class name 1891 ResourceMark rm(THREAD); 1892 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 1893 const char* str = holder->external_name(); 1894 oop classname = StringTable::intern((char*) str, CHECK_0); 1895 java_lang_StackTraceElement::set_declaringClass(element(), classname); 1896 1897 Method* method = holder->method_with_orig_idnum(method_id, version); 1898 1899 // The method can be NULL if the requested class version is gone 1900 Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref); 1901 1902 // Fill in method name 1903 oop methodname = StringTable::intern(sym, CHECK_0); 1904 java_lang_StackTraceElement::set_methodName(element(), methodname); 1905 1906 if (!version_matches(method, version)) { 1907 // The method was redefined, accurate line number information isn't available 1908 java_lang_StackTraceElement::set_fileName(element(), NULL); 1909 java_lang_StackTraceElement::set_lineNumber(element(), -1); 1910 } else { 1911 // Fill in source file name and line number. 1912 // Use specific ik version as a holder since the mirror might 1913 // refer to version that is now obsolete and no longer accessible 1914 // via the previous versions list. 1915 holder = holder->get_klass_version(version); 1916 assert(holder != NULL, "sanity check"); 1917 Symbol* source = holder->source_file_name(); 1918 if (ShowHiddenFrames && source == NULL) 1919 source = vmSymbols::unknown_class_name(); 1920 oop filename = StringTable::intern(source, CHECK_0); 1921 java_lang_StackTraceElement::set_fileName(element(), filename); 1922 1923 int line_number = get_line_number(method, bci); 1924 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 1925 } 1926 return element(); 1927 } 1928 1929 oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) { 1930 Handle mirror (THREAD, method->method_holder()->java_mirror()); 1931 int method_id = method->orig_method_idnum(); 1932 int cpref = method->name_index(); 1933 return create(mirror, method_id, method->constants()->version(), bci, cpref, THREAD); 1934 } 1935 1936 void java_lang_reflect_AccessibleObject::compute_offsets() { 1937 Klass* k = SystemDictionary::reflect_AccessibleObject_klass(); 1938 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature()); 1939 } 1940 1941 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 1942 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1943 return (jboolean) reflect->bool_field(override_offset); 1944 } 1945 1946 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 1947 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1948 reflect->bool_field_put(override_offset, (int) value); 1949 } 1950 1951 void java_lang_reflect_Method::compute_offsets() { 1952 Klass* k = SystemDictionary::reflect_Method_klass(); 1953 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 1954 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1955 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature()); 1956 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 1957 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 1958 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 1959 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 1960 // The generic signature and annotations fields are only present in 1.5 1961 signature_offset = -1; 1962 annotations_offset = -1; 1963 parameter_annotations_offset = -1; 1964 annotation_default_offset = -1; 1965 type_annotations_offset = -1; 1966 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 1967 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 1968 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 1969 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature()); 1970 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 1971 } 1972 1973 Handle java_lang_reflect_Method::create(TRAPS) { 1974 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1975 Klass* klass = SystemDictionary::reflect_Method_klass(); 1976 // This class is eagerly initialized during VM initialization, since we keep a refence 1977 // to one of the methods 1978 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized"); 1979 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD); 1980 } 1981 1982 oop java_lang_reflect_Method::clazz(oop reflect) { 1983 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1984 return reflect->obj_field(clazz_offset); 1985 } 1986 1987 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 1988 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1989 reflect->obj_field_put(clazz_offset, value); 1990 } 1991 1992 int java_lang_reflect_Method::slot(oop reflect) { 1993 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1994 return reflect->int_field(slot_offset); 1995 } 1996 1997 void java_lang_reflect_Method::set_slot(oop reflect, int value) { 1998 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1999 reflect->int_field_put(slot_offset, value); 2000 } 2001 2002 oop java_lang_reflect_Method::name(oop method) { 2003 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2004 return method->obj_field(name_offset); 2005 } 2006 2007 void java_lang_reflect_Method::set_name(oop method, oop value) { 2008 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2009 method->obj_field_put(name_offset, value); 2010 } 2011 2012 oop java_lang_reflect_Method::return_type(oop method) { 2013 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2014 return method->obj_field(returnType_offset); 2015 } 2016 2017 void java_lang_reflect_Method::set_return_type(oop method, oop value) { 2018 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2019 method->obj_field_put(returnType_offset, value); 2020 } 2021 2022 oop java_lang_reflect_Method::parameter_types(oop method) { 2023 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2024 return method->obj_field(parameterTypes_offset); 2025 } 2026 2027 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 2028 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2029 method->obj_field_put(parameterTypes_offset, value); 2030 } 2031 2032 oop java_lang_reflect_Method::exception_types(oop method) { 2033 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2034 return method->obj_field(exceptionTypes_offset); 2035 } 2036 2037 void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 2038 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2039 method->obj_field_put(exceptionTypes_offset, value); 2040 } 2041 2042 int java_lang_reflect_Method::modifiers(oop method) { 2043 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2044 return method->int_field(modifiers_offset); 2045 } 2046 2047 void java_lang_reflect_Method::set_modifiers(oop method, int value) { 2048 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2049 method->int_field_put(modifiers_offset, value); 2050 } 2051 2052 bool java_lang_reflect_Method::has_signature_field() { 2053 return (signature_offset >= 0); 2054 } 2055 2056 oop java_lang_reflect_Method::signature(oop method) { 2057 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2058 assert(has_signature_field(), "signature field must be present"); 2059 return method->obj_field(signature_offset); 2060 } 2061 2062 void java_lang_reflect_Method::set_signature(oop method, oop value) { 2063 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2064 assert(has_signature_field(), "signature field must be present"); 2065 method->obj_field_put(signature_offset, value); 2066 } 2067 2068 bool java_lang_reflect_Method::has_annotations_field() { 2069 return (annotations_offset >= 0); 2070 } 2071 2072 oop java_lang_reflect_Method::annotations(oop method) { 2073 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2074 assert(has_annotations_field(), "annotations field must be present"); 2075 return method->obj_field(annotations_offset); 2076 } 2077 2078 void java_lang_reflect_Method::set_annotations(oop method, oop value) { 2079 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2080 assert(has_annotations_field(), "annotations field must be present"); 2081 method->obj_field_put(annotations_offset, value); 2082 } 2083 2084 bool java_lang_reflect_Method::has_parameter_annotations_field() { 2085 return (parameter_annotations_offset >= 0); 2086 } 2087 2088 oop java_lang_reflect_Method::parameter_annotations(oop method) { 2089 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2090 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2091 return method->obj_field(parameter_annotations_offset); 2092 } 2093 2094 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 2095 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2096 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2097 method->obj_field_put(parameter_annotations_offset, value); 2098 } 2099 2100 bool java_lang_reflect_Method::has_annotation_default_field() { 2101 return (annotation_default_offset >= 0); 2102 } 2103 2104 oop java_lang_reflect_Method::annotation_default(oop method) { 2105 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2106 assert(has_annotation_default_field(), "annotation default field must be present"); 2107 return method->obj_field(annotation_default_offset); 2108 } 2109 2110 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 2111 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2112 assert(has_annotation_default_field(), "annotation default field must be present"); 2113 method->obj_field_put(annotation_default_offset, value); 2114 } 2115 2116 bool java_lang_reflect_Method::has_type_annotations_field() { 2117 return (type_annotations_offset >= 0); 2118 } 2119 2120 oop java_lang_reflect_Method::type_annotations(oop method) { 2121 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2122 assert(has_type_annotations_field(), "type_annotations field must be present"); 2123 return method->obj_field(type_annotations_offset); 2124 } 2125 2126 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) { 2127 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2128 assert(has_type_annotations_field(), "type_annotations field must be present"); 2129 method->obj_field_put(type_annotations_offset, value); 2130 } 2131 2132 void java_lang_reflect_Constructor::compute_offsets() { 2133 Klass* k = SystemDictionary::reflect_Constructor_klass(); 2134 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2135 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 2136 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 2137 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 2138 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2139 // The generic signature and annotations fields are only present in 1.5 2140 signature_offset = -1; 2141 annotations_offset = -1; 2142 parameter_annotations_offset = -1; 2143 type_annotations_offset = -1; 2144 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 2145 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 2146 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 2147 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 2148 } 2149 2150 Handle java_lang_reflect_Constructor::create(TRAPS) { 2151 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2152 Symbol* name = vmSymbols::java_lang_reflect_Constructor(); 2153 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2154 instanceKlassHandle klass (THREAD, k); 2155 // Ensure it is initialized 2156 klass->initialize(CHECK_NH); 2157 return klass->allocate_instance_handle(THREAD); 2158 } 2159 2160 oop java_lang_reflect_Constructor::clazz(oop reflect) { 2161 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2162 return reflect->obj_field(clazz_offset); 2163 } 2164 2165 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 2166 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2167 reflect->obj_field_put(clazz_offset, value); 2168 } 2169 2170 oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 2171 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2172 return constructor->obj_field(parameterTypes_offset); 2173 } 2174 2175 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 2176 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2177 constructor->obj_field_put(parameterTypes_offset, value); 2178 } 2179 2180 oop java_lang_reflect_Constructor::exception_types(oop constructor) { 2181 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2182 return constructor->obj_field(exceptionTypes_offset); 2183 } 2184 2185 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 2186 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2187 constructor->obj_field_put(exceptionTypes_offset, value); 2188 } 2189 2190 int java_lang_reflect_Constructor::slot(oop reflect) { 2191 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2192 return reflect->int_field(slot_offset); 2193 } 2194 2195 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 2196 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2197 reflect->int_field_put(slot_offset, value); 2198 } 2199 2200 int java_lang_reflect_Constructor::modifiers(oop constructor) { 2201 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2202 return constructor->int_field(modifiers_offset); 2203 } 2204 2205 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 2206 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2207 constructor->int_field_put(modifiers_offset, value); 2208 } 2209 2210 bool java_lang_reflect_Constructor::has_signature_field() { 2211 return (signature_offset >= 0); 2212 } 2213 2214 oop java_lang_reflect_Constructor::signature(oop constructor) { 2215 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2216 assert(has_signature_field(), "signature field must be present"); 2217 return constructor->obj_field(signature_offset); 2218 } 2219 2220 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 2221 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2222 assert(has_signature_field(), "signature field must be present"); 2223 constructor->obj_field_put(signature_offset, value); 2224 } 2225 2226 bool java_lang_reflect_Constructor::has_annotations_field() { 2227 return (annotations_offset >= 0); 2228 } 2229 2230 oop java_lang_reflect_Constructor::annotations(oop constructor) { 2231 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2232 assert(has_annotations_field(), "annotations field must be present"); 2233 return constructor->obj_field(annotations_offset); 2234 } 2235 2236 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 2237 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2238 assert(has_annotations_field(), "annotations field must be present"); 2239 constructor->obj_field_put(annotations_offset, value); 2240 } 2241 2242 bool java_lang_reflect_Constructor::has_parameter_annotations_field() { 2243 return (parameter_annotations_offset >= 0); 2244 } 2245 2246 oop java_lang_reflect_Constructor::parameter_annotations(oop method) { 2247 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2248 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2249 return method->obj_field(parameter_annotations_offset); 2250 } 2251 2252 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 2253 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2254 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2255 method->obj_field_put(parameter_annotations_offset, value); 2256 } 2257 2258 bool java_lang_reflect_Constructor::has_type_annotations_field() { 2259 return (type_annotations_offset >= 0); 2260 } 2261 2262 oop java_lang_reflect_Constructor::type_annotations(oop constructor) { 2263 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2264 assert(has_type_annotations_field(), "type_annotations field must be present"); 2265 return constructor->obj_field(type_annotations_offset); 2266 } 2267 2268 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) { 2269 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2270 assert(has_type_annotations_field(), "type_annotations field must be present"); 2271 constructor->obj_field_put(type_annotations_offset, value); 2272 } 2273 2274 void java_lang_reflect_Field::compute_offsets() { 2275 Klass* k = SystemDictionary::reflect_Field_klass(); 2276 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2277 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2278 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature()); 2279 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 2280 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2281 // The generic signature and annotations fields are only present in 1.5 2282 signature_offset = -1; 2283 annotations_offset = -1; 2284 type_annotations_offset = -1; 2285 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 2286 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 2287 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 2288 } 2289 2290 Handle java_lang_reflect_Field::create(TRAPS) { 2291 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2292 Symbol* name = vmSymbols::java_lang_reflect_Field(); 2293 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2294 instanceKlassHandle klass (THREAD, k); 2295 // Ensure it is initialized 2296 klass->initialize(CHECK_NH); 2297 return klass->allocate_instance_handle(THREAD); 2298 } 2299 2300 oop java_lang_reflect_Field::clazz(oop reflect) { 2301 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2302 return reflect->obj_field(clazz_offset); 2303 } 2304 2305 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 2306 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2307 reflect->obj_field_put(clazz_offset, value); 2308 } 2309 2310 oop java_lang_reflect_Field::name(oop field) { 2311 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2312 return field->obj_field(name_offset); 2313 } 2314 2315 void java_lang_reflect_Field::set_name(oop field, oop value) { 2316 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2317 field->obj_field_put(name_offset, value); 2318 } 2319 2320 oop java_lang_reflect_Field::type(oop field) { 2321 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2322 return field->obj_field(type_offset); 2323 } 2324 2325 void java_lang_reflect_Field::set_type(oop field, oop value) { 2326 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2327 field->obj_field_put(type_offset, value); 2328 } 2329 2330 int java_lang_reflect_Field::slot(oop reflect) { 2331 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2332 return reflect->int_field(slot_offset); 2333 } 2334 2335 void java_lang_reflect_Field::set_slot(oop reflect, int value) { 2336 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2337 reflect->int_field_put(slot_offset, value); 2338 } 2339 2340 int java_lang_reflect_Field::modifiers(oop field) { 2341 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2342 return field->int_field(modifiers_offset); 2343 } 2344 2345 void java_lang_reflect_Field::set_modifiers(oop field, int value) { 2346 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2347 field->int_field_put(modifiers_offset, value); 2348 } 2349 2350 bool java_lang_reflect_Field::has_signature_field() { 2351 return (signature_offset >= 0); 2352 } 2353 2354 oop java_lang_reflect_Field::signature(oop field) { 2355 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2356 assert(has_signature_field(), "signature field must be present"); 2357 return field->obj_field(signature_offset); 2358 } 2359 2360 void java_lang_reflect_Field::set_signature(oop field, oop value) { 2361 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2362 assert(has_signature_field(), "signature field must be present"); 2363 field->obj_field_put(signature_offset, value); 2364 } 2365 2366 bool java_lang_reflect_Field::has_annotations_field() { 2367 return (annotations_offset >= 0); 2368 } 2369 2370 oop java_lang_reflect_Field::annotations(oop field) { 2371 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2372 assert(has_annotations_field(), "annotations field must be present"); 2373 return field->obj_field(annotations_offset); 2374 } 2375 2376 void java_lang_reflect_Field::set_annotations(oop field, oop value) { 2377 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2378 assert(has_annotations_field(), "annotations field must be present"); 2379 field->obj_field_put(annotations_offset, value); 2380 } 2381 2382 bool java_lang_reflect_Field::has_type_annotations_field() { 2383 return (type_annotations_offset >= 0); 2384 } 2385 2386 oop java_lang_reflect_Field::type_annotations(oop field) { 2387 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2388 assert(has_type_annotations_field(), "type_annotations field must be present"); 2389 return field->obj_field(type_annotations_offset); 2390 } 2391 2392 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) { 2393 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2394 assert(has_type_annotations_field(), "type_annotations field must be present"); 2395 field->obj_field_put(type_annotations_offset, value); 2396 } 2397 2398 void sun_reflect_ConstantPool::compute_offsets() { 2399 Klass* k = SystemDictionary::reflect_ConstantPool_klass(); 2400 // This null test can be removed post beta 2401 if (k != NULL) { 2402 // The field is called ConstantPool* in the sun.reflect.ConstantPool class. 2403 compute_offset(_oop_offset, k, vmSymbols::ConstantPool_name(), vmSymbols::object_signature()); 2404 } 2405 } 2406 2407 void java_lang_reflect_Parameter::compute_offsets() { 2408 Klass* k = SystemDictionary::reflect_Parameter_klass(); 2409 if(NULL != k) { 2410 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2411 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2412 compute_offset(index_offset, k, vmSymbols::index_name(), vmSymbols::int_signature()); 2413 compute_offset(executable_offset, k, vmSymbols::executable_name(), vmSymbols::executable_signature()); 2414 } 2415 } 2416 2417 Handle java_lang_reflect_Parameter::create(TRAPS) { 2418 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2419 Symbol* name = vmSymbols::java_lang_reflect_Parameter(); 2420 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2421 instanceKlassHandle klass (THREAD, k); 2422 // Ensure it is initialized 2423 klass->initialize(CHECK_NH); 2424 return klass->allocate_instance_handle(THREAD); 2425 } 2426 2427 oop java_lang_reflect_Parameter::name(oop param) { 2428 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2429 return param->obj_field(name_offset); 2430 } 2431 2432 void java_lang_reflect_Parameter::set_name(oop param, oop value) { 2433 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2434 param->obj_field_put(name_offset, value); 2435 } 2436 2437 int java_lang_reflect_Parameter::modifiers(oop param) { 2438 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2439 return param->int_field(modifiers_offset); 2440 } 2441 2442 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) { 2443 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2444 param->int_field_put(modifiers_offset, value); 2445 } 2446 2447 int java_lang_reflect_Parameter::index(oop param) { 2448 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2449 return param->int_field(index_offset); 2450 } 2451 2452 void java_lang_reflect_Parameter::set_index(oop param, int value) { 2453 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2454 param->int_field_put(index_offset, value); 2455 } 2456 2457 oop java_lang_reflect_Parameter::executable(oop param) { 2458 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2459 return param->obj_field(executable_offset); 2460 } 2461 2462 void java_lang_reflect_Parameter::set_executable(oop param, oop value) { 2463 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2464 param->obj_field_put(executable_offset, value); 2465 } 2466 2467 2468 Handle sun_reflect_ConstantPool::create(TRAPS) { 2469 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2470 Klass* k = SystemDictionary::reflect_ConstantPool_klass(); 2471 instanceKlassHandle klass (THREAD, k); 2472 // Ensure it is initialized 2473 klass->initialize(CHECK_NH); 2474 return klass->allocate_instance_handle(THREAD); 2475 } 2476 2477 2478 void sun_reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) { 2479 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2480 oop mirror = value->pool_holder()->java_mirror(); 2481 // Save the mirror to get back the constant pool. 2482 reflect->obj_field_put(_oop_offset, mirror); 2483 } 2484 2485 ConstantPool* sun_reflect_ConstantPool::get_cp(oop reflect) { 2486 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2487 2488 oop mirror = reflect->obj_field(_oop_offset); 2489 Klass* k = java_lang_Class::as_Klass(mirror); 2490 assert(k->oop_is_instance(), "Must be"); 2491 2492 // Get the constant pool back from the klass. Since class redefinition 2493 // merges the new constant pool into the old, this is essentially the 2494 // same constant pool as the original. If constant pool merging is 2495 // no longer done in the future, this will have to change to save 2496 // the original. 2497 return InstanceKlass::cast(k)->constants(); 2498 } 2499 2500 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() { 2501 Klass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass(); 2502 // This null test can be removed post beta 2503 if (k != NULL) { 2504 compute_offset(_base_offset, k, 2505 vmSymbols::base_name(), vmSymbols::object_signature()); 2506 } 2507 } 2508 2509 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 2510 Klass* k = SystemDictionary::box_klass(type); 2511 if (k == NULL) return NULL; 2512 instanceKlassHandle h (THREAD, k); 2513 if (!h->is_initialized()) h->initialize(CHECK_0); 2514 return h->allocate_instance(THREAD); 2515 } 2516 2517 2518 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 2519 oop box = initialize_and_allocate(type, CHECK_0); 2520 if (box == NULL) return NULL; 2521 switch (type) { 2522 case T_BOOLEAN: 2523 box->bool_field_put(value_offset, value->z); 2524 break; 2525 case T_CHAR: 2526 box->char_field_put(value_offset, value->c); 2527 break; 2528 case T_FLOAT: 2529 box->float_field_put(value_offset, value->f); 2530 break; 2531 case T_DOUBLE: 2532 box->double_field_put(long_value_offset, value->d); 2533 break; 2534 case T_BYTE: 2535 box->byte_field_put(value_offset, value->b); 2536 break; 2537 case T_SHORT: 2538 box->short_field_put(value_offset, value->s); 2539 break; 2540 case T_INT: 2541 box->int_field_put(value_offset, value->i); 2542 break; 2543 case T_LONG: 2544 box->long_field_put(long_value_offset, value->j); 2545 break; 2546 default: 2547 return NULL; 2548 } 2549 return box; 2550 } 2551 2552 2553 BasicType java_lang_boxing_object::basic_type(oop box) { 2554 if (box == NULL) return T_ILLEGAL; 2555 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2556 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 2557 return T_ILLEGAL; 2558 return type; 2559 } 2560 2561 2562 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 2563 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2564 switch (type) { 2565 case T_BOOLEAN: 2566 value->z = box->bool_field(value_offset); 2567 break; 2568 case T_CHAR: 2569 value->c = box->char_field(value_offset); 2570 break; 2571 case T_FLOAT: 2572 value->f = box->float_field(value_offset); 2573 break; 2574 case T_DOUBLE: 2575 value->d = box->double_field(long_value_offset); 2576 break; 2577 case T_BYTE: 2578 value->b = box->byte_field(value_offset); 2579 break; 2580 case T_SHORT: 2581 value->s = box->short_field(value_offset); 2582 break; 2583 case T_INT: 2584 value->i = box->int_field(value_offset); 2585 break; 2586 case T_LONG: 2587 value->j = box->long_field(long_value_offset); 2588 break; 2589 default: 2590 return T_ILLEGAL; 2591 } // end switch 2592 return type; 2593 } 2594 2595 2596 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 2597 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2598 switch (type) { 2599 case T_BOOLEAN: 2600 box->bool_field_put(value_offset, value->z); 2601 break; 2602 case T_CHAR: 2603 box->char_field_put(value_offset, value->c); 2604 break; 2605 case T_FLOAT: 2606 box->float_field_put(value_offset, value->f); 2607 break; 2608 case T_DOUBLE: 2609 box->double_field_put(long_value_offset, value->d); 2610 break; 2611 case T_BYTE: 2612 box->byte_field_put(value_offset, value->b); 2613 break; 2614 case T_SHORT: 2615 box->short_field_put(value_offset, value->s); 2616 break; 2617 case T_INT: 2618 box->int_field_put(value_offset, value->i); 2619 break; 2620 case T_LONG: 2621 box->long_field_put(long_value_offset, value->j); 2622 break; 2623 default: 2624 return T_ILLEGAL; 2625 } // end switch 2626 return type; 2627 } 2628 2629 2630 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) { 2631 switch (type) { 2632 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break; 2633 case T_CHAR: st->print("%d", value->c); break; 2634 case T_BYTE: st->print("%d", value->b); break; 2635 case T_SHORT: st->print("%d", value->s); break; 2636 case T_INT: st->print("%d", value->i); break; 2637 case T_LONG: st->print(INT64_FORMAT, value->j); break; 2638 case T_FLOAT: st->print("%f", value->f); break; 2639 case T_DOUBLE: st->print("%lf", value->d); break; 2640 default: st->print("type %d?", type); break; 2641 } 2642 } 2643 2644 2645 // Support for java_lang_ref_Reference 2646 HeapWord *java_lang_ref_Reference::pending_list_lock_addr() { 2647 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass()); 2648 address addr = ik->static_field_addr(static_lock_offset); 2649 return (HeapWord*) addr; 2650 } 2651 2652 oop java_lang_ref_Reference::pending_list_lock() { 2653 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass()); 2654 address addr = ik->static_field_addr(static_lock_offset); 2655 if (UseCompressedOops) { 2656 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 2657 } else { 2658 return oopDesc::load_decode_heap_oop((oop*)addr); 2659 } 2660 } 2661 2662 HeapWord *java_lang_ref_Reference::pending_list_addr() { 2663 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass()); 2664 address addr = ik->static_field_addr(static_pending_offset); 2665 // XXX This might not be HeapWord aligned, almost rather be char *. 2666 return (HeapWord*)addr; 2667 } 2668 2669 oop java_lang_ref_Reference::pending_list() { 2670 char *addr = (char *)pending_list_addr(); 2671 if (UseCompressedOops) { 2672 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 2673 } else { 2674 return oopDesc::load_decode_heap_oop((oop*)addr); 2675 } 2676 } 2677 2678 2679 // Support for java_lang_ref_SoftReference 2680 2681 jlong java_lang_ref_SoftReference::timestamp(oop ref) { 2682 return ref->long_field(timestamp_offset); 2683 } 2684 2685 jlong java_lang_ref_SoftReference::clock() { 2686 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass()); 2687 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset); 2688 return *offset; 2689 } 2690 2691 void java_lang_ref_SoftReference::set_clock(jlong value) { 2692 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass()); 2693 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset); 2694 *offset = value; 2695 } 2696 2697 // Support for java_lang_invoke_DirectMethodHandle 2698 2699 int java_lang_invoke_DirectMethodHandle::_member_offset; 2700 2701 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) { 2702 oop member_name = NULL; 2703 bool is_dmh = dmh->is_oop() && java_lang_invoke_DirectMethodHandle::is_instance(dmh); 2704 assert(is_dmh, "a DirectMethodHandle oop is expected"); 2705 if (is_dmh) { 2706 member_name = dmh->obj_field(member_offset_in_bytes()); 2707 } 2708 return member_name; 2709 } 2710 2711 void java_lang_invoke_DirectMethodHandle::compute_offsets() { 2712 Klass* klass_oop = SystemDictionary::DirectMethodHandle_klass(); 2713 if (klass_oop != NULL) { 2714 compute_offset(_member_offset, klass_oop, vmSymbols::member_name(), vmSymbols::java_lang_invoke_MemberName_signature()); 2715 } 2716 } 2717 2718 // Support for java_lang_invoke_MethodHandle 2719 2720 int java_lang_invoke_MethodHandle::_type_offset; 2721 int java_lang_invoke_MethodHandle::_form_offset; 2722 2723 int java_lang_invoke_MemberName::_clazz_offset; 2724 int java_lang_invoke_MemberName::_name_offset; 2725 int java_lang_invoke_MemberName::_type_offset; 2726 int java_lang_invoke_MemberName::_flags_offset; 2727 int java_lang_invoke_MemberName::_vmtarget_offset; 2728 int java_lang_invoke_MemberName::_vmloader_offset; 2729 int java_lang_invoke_MemberName::_vmindex_offset; 2730 2731 int java_lang_invoke_LambdaForm::_vmentry_offset; 2732 2733 void java_lang_invoke_MethodHandle::compute_offsets() { 2734 Klass* klass_oop = SystemDictionary::MethodHandle_klass(); 2735 if (klass_oop != NULL) { 2736 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature()); 2737 compute_offset(_form_offset, klass_oop, vmSymbols::form_name(), vmSymbols::java_lang_invoke_LambdaForm_signature()); 2738 } 2739 } 2740 2741 void java_lang_invoke_MemberName::compute_offsets() { 2742 Klass* klass_oop = SystemDictionary::MemberName_klass(); 2743 if (klass_oop != NULL) { 2744 compute_offset(_clazz_offset, klass_oop, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2745 compute_offset(_name_offset, klass_oop, vmSymbols::name_name(), vmSymbols::string_signature()); 2746 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::object_signature()); 2747 compute_offset(_flags_offset, klass_oop, vmSymbols::flags_name(), vmSymbols::int_signature()); 2748 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 2749 } 2750 } 2751 2752 void java_lang_invoke_LambdaForm::compute_offsets() { 2753 Klass* klass_oop = SystemDictionary::LambdaForm_klass(); 2754 if (klass_oop != NULL) { 2755 compute_offset(_vmentry_offset, klass_oop, vmSymbols::vmentry_name(), vmSymbols::java_lang_invoke_MemberName_signature()); 2756 } 2757 } 2758 2759 bool java_lang_invoke_LambdaForm::is_instance(oop obj) { 2760 return obj != NULL && is_subclass(obj->klass()); 2761 } 2762 2763 2764 oop java_lang_invoke_MethodHandle::type(oop mh) { 2765 return mh->obj_field(_type_offset); 2766 } 2767 2768 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) { 2769 mh->obj_field_put(_type_offset, mtype); 2770 } 2771 2772 oop java_lang_invoke_MethodHandle::form(oop mh) { 2773 assert(_form_offset != 0, ""); 2774 return mh->obj_field(_form_offset); 2775 } 2776 2777 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) { 2778 assert(_form_offset != 0, ""); 2779 mh->obj_field_put(_form_offset, lform); 2780 } 2781 2782 /// MemberName accessors 2783 2784 oop java_lang_invoke_MemberName::clazz(oop mname) { 2785 assert(is_instance(mname), "wrong type"); 2786 return mname->obj_field(_clazz_offset); 2787 } 2788 2789 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) { 2790 assert(is_instance(mname), "wrong type"); 2791 mname->obj_field_put(_clazz_offset, clazz); 2792 } 2793 2794 oop java_lang_invoke_MemberName::name(oop mname) { 2795 assert(is_instance(mname), "wrong type"); 2796 return mname->obj_field(_name_offset); 2797 } 2798 2799 void java_lang_invoke_MemberName::set_name(oop mname, oop name) { 2800 assert(is_instance(mname), "wrong type"); 2801 mname->obj_field_put(_name_offset, name); 2802 } 2803 2804 oop java_lang_invoke_MemberName::type(oop mname) { 2805 assert(is_instance(mname), "wrong type"); 2806 return mname->obj_field(_type_offset); 2807 } 2808 2809 void java_lang_invoke_MemberName::set_type(oop mname, oop type) { 2810 assert(is_instance(mname), "wrong type"); 2811 mname->obj_field_put(_type_offset, type); 2812 } 2813 2814 int java_lang_invoke_MemberName::flags(oop mname) { 2815 assert(is_instance(mname), "wrong type"); 2816 return mname->int_field(_flags_offset); 2817 } 2818 2819 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) { 2820 assert(is_instance(mname), "wrong type"); 2821 mname->int_field_put(_flags_offset, flags); 2822 } 2823 2824 Metadata* java_lang_invoke_MemberName::vmtarget(oop mname) { 2825 assert(is_instance(mname), "wrong type"); 2826 return (Metadata*)mname->address_field(_vmtarget_offset); 2827 } 2828 2829 bool java_lang_invoke_MemberName::is_method(oop mname) { 2830 assert(is_instance(mname), "must be MemberName"); 2831 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0; 2832 } 2833 2834 #if INCLUDE_JVMTI 2835 // Can be executed on VM thread only 2836 void java_lang_invoke_MemberName::adjust_vmtarget(oop mname, Method* old_method, 2837 Method* new_method, bool* trace_name_printed) { 2838 assert(is_method(mname), "wrong type"); 2839 assert(Thread::current()->is_VM_thread(), "not VM thread"); 2840 2841 Method* target = (Method*)mname->address_field(_vmtarget_offset); 2842 if (target == old_method) { 2843 mname->address_field_put(_vmtarget_offset, (address)new_method); 2844 2845 if (RC_TRACE_IN_RANGE(0x00100000, 0x00400000)) { 2846 if (!(*trace_name_printed)) { 2847 // RC_TRACE_MESG macro has an embedded ResourceMark 2848 RC_TRACE_MESG(("adjust: name=%s", 2849 old_method->method_holder()->external_name())); 2850 *trace_name_printed = true; 2851 } 2852 // RC_TRACE macro has an embedded ResourceMark 2853 RC_TRACE(0x00400000, ("MemberName method update: %s(%s)", 2854 new_method->name()->as_C_string(), 2855 new_method->signature()->as_C_string())); 2856 } 2857 } 2858 } 2859 #endif // INCLUDE_JVMTI 2860 2861 void java_lang_invoke_MemberName::set_vmtarget(oop mname, Metadata* ref) { 2862 assert(is_instance(mname), "wrong type"); 2863 // check the type of the vmtarget 2864 oop dependency = NULL; 2865 if (ref != NULL) { 2866 switch (flags(mname) & (MN_IS_METHOD | 2867 MN_IS_CONSTRUCTOR | 2868 MN_IS_FIELD)) { 2869 case MN_IS_METHOD: 2870 case MN_IS_CONSTRUCTOR: 2871 assert(ref->is_method(), "should be a method"); 2872 dependency = ((Method*)ref)->method_holder()->java_mirror(); 2873 break; 2874 case MN_IS_FIELD: 2875 assert(ref->is_klass(), "should be a class"); 2876 dependency = ((Klass*)ref)->java_mirror(); 2877 break; 2878 default: 2879 ShouldNotReachHere(); 2880 } 2881 } 2882 mname->address_field_put(_vmtarget_offset, (address)ref); 2883 // Add a reference to the loader (actually mirror because anonymous classes will not have 2884 // distinct loaders) to ensure the metadata is kept alive 2885 // This mirror may be different than the one in clazz field. 2886 mname->obj_field_put(_vmloader_offset, dependency); 2887 } 2888 2889 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) { 2890 assert(is_instance(mname), "wrong type"); 2891 return (intptr_t) mname->address_field(_vmindex_offset); 2892 } 2893 2894 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) { 2895 assert(is_instance(mname), "wrong type"); 2896 mname->address_field_put(_vmindex_offset, (address) index); 2897 } 2898 2899 oop java_lang_invoke_LambdaForm::vmentry(oop lform) { 2900 assert(is_instance(lform), "wrong type"); 2901 return lform->obj_field(_vmentry_offset); 2902 } 2903 2904 2905 // Support for java_lang_invoke_MethodType 2906 2907 int java_lang_invoke_MethodType::_rtype_offset; 2908 int java_lang_invoke_MethodType::_ptypes_offset; 2909 2910 void java_lang_invoke_MethodType::compute_offsets() { 2911 Klass* k = SystemDictionary::MethodType_klass(); 2912 if (k != NULL) { 2913 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature()); 2914 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature()); 2915 } 2916 } 2917 2918 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) { 2919 st->print("("); 2920 objArrayOop pts = ptypes(mt); 2921 for (int i = 0, limit = pts->length(); i < limit; i++) { 2922 java_lang_Class::print_signature(pts->obj_at(i), st); 2923 } 2924 st->print(")"); 2925 java_lang_Class::print_signature(rtype(mt), st); 2926 } 2927 2928 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) { 2929 ResourceMark rm; 2930 stringStream buffer(128); 2931 print_signature(mt, &buffer); 2932 const char* sigstr = buffer.base(); 2933 int siglen = (int) buffer.size(); 2934 Symbol *name; 2935 if (!intern_if_not_found) { 2936 name = SymbolTable::probe(sigstr, siglen); 2937 } else { 2938 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 2939 } 2940 return name; 2941 } 2942 2943 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) { 2944 if (mt1 == mt2) 2945 return true; 2946 if (rtype(mt1) != rtype(mt2)) 2947 return false; 2948 if (ptype_count(mt1) != ptype_count(mt2)) 2949 return false; 2950 for (int i = ptype_count(mt1) - 1; i >= 0; i--) { 2951 if (ptype(mt1, i) != ptype(mt2, i)) 2952 return false; 2953 } 2954 return true; 2955 } 2956 2957 oop java_lang_invoke_MethodType::rtype(oop mt) { 2958 assert(is_instance(mt), "must be a MethodType"); 2959 return mt->obj_field(_rtype_offset); 2960 } 2961 2962 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) { 2963 assert(is_instance(mt), "must be a MethodType"); 2964 return (objArrayOop) mt->obj_field(_ptypes_offset); 2965 } 2966 2967 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) { 2968 return ptypes(mt)->obj_at(idx); 2969 } 2970 2971 int java_lang_invoke_MethodType::ptype_count(oop mt) { 2972 return ptypes(mt)->length(); 2973 } 2974 2975 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) { 2976 objArrayOop pts = ptypes(mt); 2977 int count = pts->length(); 2978 int slots = 0; 2979 for (int i = 0; i < count; i++) { 2980 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i)); 2981 slots += type2size[bt]; 2982 } 2983 return slots; 2984 } 2985 2986 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) { 2987 BasicType bt = java_lang_Class::as_BasicType(rtype(mt)); 2988 return type2size[bt]; 2989 } 2990 2991 2992 // Support for java_lang_invoke_CallSite 2993 2994 int java_lang_invoke_CallSite::_target_offset; 2995 2996 void java_lang_invoke_CallSite::compute_offsets() { 2997 Klass* k = SystemDictionary::CallSite_klass(); 2998 if (k != NULL) { 2999 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature()); 3000 } 3001 } 3002 3003 3004 // Support for java_security_AccessControlContext 3005 3006 int java_security_AccessControlContext::_context_offset = 0; 3007 int java_security_AccessControlContext::_privilegedContext_offset = 0; 3008 int java_security_AccessControlContext::_isPrivileged_offset = 0; 3009 int java_security_AccessControlContext::_isAuthorized_offset = -1; 3010 3011 void java_security_AccessControlContext::compute_offsets() { 3012 assert(_isPrivileged_offset == 0, "offsets should be initialized only once"); 3013 fieldDescriptor fd; 3014 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass()); 3015 3016 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) { 3017 fatal("Invalid layout of java.security.AccessControlContext"); 3018 } 3019 _context_offset = fd.offset(); 3020 3021 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) { 3022 fatal("Invalid layout of java.security.AccessControlContext"); 3023 } 3024 _privilegedContext_offset = fd.offset(); 3025 3026 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) { 3027 fatal("Invalid layout of java.security.AccessControlContext"); 3028 } 3029 _isPrivileged_offset = fd.offset(); 3030 3031 // The offset may not be present for bootstrapping with older JDK. 3032 if (ik->find_local_field(vmSymbols::isAuthorized_name(), vmSymbols::bool_signature(), &fd)) { 3033 _isAuthorized_offset = fd.offset(); 3034 } 3035 } 3036 3037 3038 bool java_security_AccessControlContext::is_authorized(Handle context) { 3039 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type"); 3040 assert(_isAuthorized_offset != -1, "should be set"); 3041 return context->bool_field(_isAuthorized_offset) != 0; 3042 } 3043 3044 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) { 3045 assert(_isPrivileged_offset != 0, "offsets should have been initialized"); 3046 // Ensure klass is initialized 3047 InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->initialize(CHECK_0); 3048 // Allocate result 3049 oop result = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->allocate_instance(CHECK_0); 3050 // Fill in values 3051 result->obj_field_put(_context_offset, context()); 3052 result->obj_field_put(_privilegedContext_offset, privileged_context()); 3053 result->bool_field_put(_isPrivileged_offset, isPrivileged); 3054 // whitelist AccessControlContexts created by the JVM if present 3055 if (_isAuthorized_offset != -1) { 3056 result->bool_field_put(_isAuthorized_offset, true); 3057 } 3058 return result; 3059 } 3060 3061 3062 // Support for java_lang_ClassLoader 3063 3064 bool java_lang_ClassLoader::offsets_computed = false; 3065 int java_lang_ClassLoader::_loader_data_offset = -1; 3066 int java_lang_ClassLoader::parallelCapable_offset = -1; 3067 3068 ClassLoaderData** java_lang_ClassLoader::loader_data_addr(oop loader) { 3069 assert(loader != NULL && loader->is_oop(), "loader must be oop"); 3070 return (ClassLoaderData**) loader->address_field_addr(_loader_data_offset); 3071 } 3072 3073 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) { 3074 return *java_lang_ClassLoader::loader_data_addr(loader); 3075 } 3076 3077 void java_lang_ClassLoader::compute_offsets() { 3078 assert(!offsets_computed, "offsets should be initialized only once"); 3079 offsets_computed = true; 3080 3081 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7, 3082 Klass* k1 = SystemDictionary::ClassLoader_klass(); 3083 compute_optional_offset(parallelCapable_offset, 3084 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature()); 3085 3086 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3087 } 3088 3089 oop java_lang_ClassLoader::parent(oop loader) { 3090 assert(is_instance(loader), "loader must be oop"); 3091 return loader->obj_field(parent_offset); 3092 } 3093 3094 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) { 3095 assert(is_instance(loader), "loader must be oop"); 3096 assert(cl == NULL || is_instance(cl), "cl argument must be oop"); 3097 oop acl = loader; 3098 debug_only(jint loop_count = 0); 3099 // This loop taken verbatim from ClassLoader.java: 3100 do { 3101 acl = parent(acl); 3102 if (cl == acl) { 3103 return true; 3104 } 3105 assert(++loop_count > 0, "loop_count overflow"); 3106 } while (acl != NULL); 3107 return false; 3108 } 3109 3110 bool java_lang_ClassLoader::is_instance(oop obj) { 3111 return obj != NULL && is_subclass(obj->klass()); 3112 } 3113 3114 3115 // For class loader classes, parallelCapable defined 3116 // based on non-null field 3117 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it 3118 bool java_lang_ClassLoader::parallelCapable(oop class_loader) { 3119 if (parallelCapable_offset == -1) { 3120 // Default for backward compatibility is false 3121 return false; 3122 } 3123 return (class_loader->obj_field(parallelCapable_offset) != NULL); 3124 } 3125 3126 bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 3127 // Fix for 4474172; see evaluation for more details 3128 loader = non_reflection_class_loader(loader); 3129 3130 oop cl = SystemDictionary::java_system_loader(); 3131 while(cl != NULL) { 3132 if (cl == loader) return true; 3133 cl = parent(cl); 3134 } 3135 return false; 3136 } 3137 3138 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) { 3139 if (loader != NULL) { 3140 // See whether this is one of the class loaders associated with 3141 // the generated bytecodes for reflection, and if so, "magically" 3142 // delegate to its parent to prevent class loading from occurring 3143 // in places where applications using reflection didn't expect it. 3144 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass(); 3145 // This might be null in non-1.4 JDKs 3146 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) { 3147 return parent(loader); 3148 } 3149 } 3150 return loader; 3151 } 3152 3153 3154 // Support for java_lang_System 3155 int java_lang_System::in_offset_in_bytes() { 3156 return (InstanceMirrorKlass::offset_of_static_fields() + static_in_offset); 3157 } 3158 3159 3160 int java_lang_System::out_offset_in_bytes() { 3161 return (InstanceMirrorKlass::offset_of_static_fields() + static_out_offset); 3162 } 3163 3164 3165 int java_lang_System::err_offset_in_bytes() { 3166 return (InstanceMirrorKlass::offset_of_static_fields() + static_err_offset); 3167 } 3168 3169 3170 bool java_lang_System::has_security_manager() { 3171 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::System_klass()); 3172 address addr = ik->static_field_addr(static_security_offset); 3173 if (UseCompressedOops) { 3174 return oopDesc::load_decode_heap_oop((narrowOop *)addr) != NULL; 3175 } else { 3176 return oopDesc::load_decode_heap_oop((oop*)addr) != NULL; 3177 } 3178 } 3179 3180 int java_lang_Class::_klass_offset; 3181 int java_lang_Class::_array_klass_offset; 3182 int java_lang_Class::_oop_size_offset; 3183 int java_lang_Class::_static_oop_field_count_offset; 3184 int java_lang_Class::_class_loader_offset; 3185 int java_lang_Class::_protection_domain_offset; 3186 int java_lang_Class::_component_mirror_offset; 3187 int java_lang_Class::_init_lock_offset; 3188 int java_lang_Class::_signers_offset; 3189 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL; 3190 int java_lang_Throwable::backtrace_offset; 3191 int java_lang_Throwable::detailMessage_offset; 3192 int java_lang_Throwable::cause_offset; 3193 int java_lang_Throwable::stackTrace_offset; 3194 int java_lang_Throwable::static_unassigned_stacktrace_offset; 3195 int java_lang_reflect_AccessibleObject::override_offset; 3196 int java_lang_reflect_Method::clazz_offset; 3197 int java_lang_reflect_Method::name_offset; 3198 int java_lang_reflect_Method::returnType_offset; 3199 int java_lang_reflect_Method::parameterTypes_offset; 3200 int java_lang_reflect_Method::exceptionTypes_offset; 3201 int java_lang_reflect_Method::slot_offset; 3202 int java_lang_reflect_Method::modifiers_offset; 3203 int java_lang_reflect_Method::signature_offset; 3204 int java_lang_reflect_Method::annotations_offset; 3205 int java_lang_reflect_Method::parameter_annotations_offset; 3206 int java_lang_reflect_Method::annotation_default_offset; 3207 int java_lang_reflect_Method::type_annotations_offset; 3208 int java_lang_reflect_Constructor::clazz_offset; 3209 int java_lang_reflect_Constructor::parameterTypes_offset; 3210 int java_lang_reflect_Constructor::exceptionTypes_offset; 3211 int java_lang_reflect_Constructor::slot_offset; 3212 int java_lang_reflect_Constructor::modifiers_offset; 3213 int java_lang_reflect_Constructor::signature_offset; 3214 int java_lang_reflect_Constructor::annotations_offset; 3215 int java_lang_reflect_Constructor::parameter_annotations_offset; 3216 int java_lang_reflect_Constructor::type_annotations_offset; 3217 int java_lang_reflect_Field::clazz_offset; 3218 int java_lang_reflect_Field::name_offset; 3219 int java_lang_reflect_Field::type_offset; 3220 int java_lang_reflect_Field::slot_offset; 3221 int java_lang_reflect_Field::modifiers_offset; 3222 int java_lang_reflect_Field::signature_offset; 3223 int java_lang_reflect_Field::annotations_offset; 3224 int java_lang_reflect_Field::type_annotations_offset; 3225 int java_lang_reflect_Parameter::name_offset; 3226 int java_lang_reflect_Parameter::modifiers_offset; 3227 int java_lang_reflect_Parameter::index_offset; 3228 int java_lang_reflect_Parameter::executable_offset; 3229 int java_lang_boxing_object::value_offset; 3230 int java_lang_boxing_object::long_value_offset; 3231 int java_lang_ref_Reference::referent_offset; 3232 int java_lang_ref_Reference::queue_offset; 3233 int java_lang_ref_Reference::next_offset; 3234 int java_lang_ref_Reference::discovered_offset; 3235 int java_lang_ref_Reference::static_lock_offset; 3236 int java_lang_ref_Reference::static_pending_offset; 3237 int java_lang_ref_Reference::number_of_fake_oop_fields; 3238 int java_lang_ref_SoftReference::timestamp_offset; 3239 int java_lang_ref_SoftReference::static_clock_offset; 3240 int java_lang_ClassLoader::parent_offset; 3241 int java_lang_System::static_in_offset; 3242 int java_lang_System::static_out_offset; 3243 int java_lang_System::static_err_offset; 3244 int java_lang_System::static_security_offset; 3245 int java_lang_StackTraceElement::declaringClass_offset; 3246 int java_lang_StackTraceElement::methodName_offset; 3247 int java_lang_StackTraceElement::fileName_offset; 3248 int java_lang_StackTraceElement::lineNumber_offset; 3249 int java_lang_AssertionStatusDirectives::classes_offset; 3250 int java_lang_AssertionStatusDirectives::classEnabled_offset; 3251 int java_lang_AssertionStatusDirectives::packages_offset; 3252 int java_lang_AssertionStatusDirectives::packageEnabled_offset; 3253 int java_lang_AssertionStatusDirectives::deflt_offset; 3254 int java_nio_Buffer::_limit_offset; 3255 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0; 3256 int sun_reflect_ConstantPool::_oop_offset; 3257 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset; 3258 3259 3260 // Support for java_lang_StackTraceElement 3261 3262 void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 3263 element->obj_field_put(fileName_offset, value); 3264 } 3265 3266 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 3267 element->obj_field_put(declaringClass_offset, value); 3268 } 3269 3270 void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 3271 element->obj_field_put(methodName_offset, value); 3272 } 3273 3274 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 3275 element->int_field_put(lineNumber_offset, value); 3276 } 3277 3278 3279 // Support for java Assertions - java_lang_AssertionStatusDirectives. 3280 3281 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 3282 o->obj_field_put(classes_offset, val); 3283 } 3284 3285 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 3286 o->obj_field_put(classEnabled_offset, val); 3287 } 3288 3289 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 3290 o->obj_field_put(packages_offset, val); 3291 } 3292 3293 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 3294 o->obj_field_put(packageEnabled_offset, val); 3295 } 3296 3297 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 3298 o->bool_field_put(deflt_offset, val); 3299 } 3300 3301 3302 // Support for intrinsification of java.nio.Buffer.checkIndex 3303 int java_nio_Buffer::limit_offset() { 3304 return _limit_offset; 3305 } 3306 3307 3308 void java_nio_Buffer::compute_offsets() { 3309 Klass* k = SystemDictionary::nio_Buffer_klass(); 3310 assert(k != NULL, "must be loaded in 1.4+"); 3311 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature()); 3312 } 3313 3314 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) { 3315 if (_owner_offset != 0) return; 3316 3317 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK); 3318 Klass* k = SystemDictionary::abstract_ownable_synchronizer_klass(); 3319 compute_offset(_owner_offset, k, 3320 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature()); 3321 } 3322 3323 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 3324 assert(_owner_offset != 0, "Must be initialized"); 3325 return obj->obj_field(_owner_offset); 3326 } 3327 3328 // Compute hard-coded offsets 3329 // Invoked before SystemDictionary::initialize, so pre-loaded classes 3330 // are not available to determine the offset_of_static_fields. 3331 void JavaClasses::compute_hard_coded_offsets() { 3332 const int x = heapOopSize; 3333 const int header = instanceOopDesc::base_offset_in_bytes(); 3334 3335 // Throwable Class 3336 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header; 3337 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header; 3338 java_lang_Throwable::cause_offset = java_lang_Throwable::hc_cause_offset * x + header; 3339 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header; 3340 java_lang_Throwable::static_unassigned_stacktrace_offset = java_lang_Throwable::hc_static_unassigned_stacktrace_offset * x; 3341 3342 // java_lang_boxing_object 3343 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header; 3344 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong); 3345 3346 // java_lang_ref_Reference: 3347 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header; 3348 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header; 3349 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header; 3350 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header; 3351 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x; 3352 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x; 3353 // Artificial fields for java_lang_ref_Reference 3354 // The first field is for the discovered field added in 1.4 3355 java_lang_ref_Reference::number_of_fake_oop_fields = 1; 3356 3357 // java_lang_ref_SoftReference Class 3358 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong); 3359 // Don't multiply static fields because they are always in wordSize units 3360 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x; 3361 3362 // java_lang_ClassLoader 3363 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header; 3364 3365 // java_lang_System 3366 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x; 3367 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x; 3368 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x; 3369 java_lang_System::static_security_offset = java_lang_System::hc_static_security_offset * x; 3370 3371 // java_lang_StackTraceElement 3372 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header; 3373 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header; 3374 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header; 3375 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header; 3376 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header; 3377 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header; 3378 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header; 3379 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header; 3380 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header; 3381 3382 } 3383 3384 3385 // Compute non-hard-coded field offsets of all the classes in this file 3386 void JavaClasses::compute_offsets() { 3387 // java_lang_Class::compute_offsets was called earlier in bootstrap 3388 java_lang_ClassLoader::compute_offsets(); 3389 java_lang_Thread::compute_offsets(); 3390 java_lang_ThreadGroup::compute_offsets(); 3391 java_lang_invoke_MethodHandle::compute_offsets(); 3392 java_lang_invoke_DirectMethodHandle::compute_offsets(); 3393 java_lang_invoke_MemberName::compute_offsets(); 3394 java_lang_invoke_LambdaForm::compute_offsets(); 3395 java_lang_invoke_MethodType::compute_offsets(); 3396 java_lang_invoke_CallSite::compute_offsets(); 3397 java_security_AccessControlContext::compute_offsets(); 3398 // Initialize reflection classes. The layouts of these classes 3399 // changed with the new reflection implementation in JDK 1.4, and 3400 // since the Universe doesn't know what JDK version it is until this 3401 // point we defer computation of these offsets until now. 3402 java_lang_reflect_AccessibleObject::compute_offsets(); 3403 java_lang_reflect_Method::compute_offsets(); 3404 java_lang_reflect_Constructor::compute_offsets(); 3405 java_lang_reflect_Field::compute_offsets(); 3406 java_nio_Buffer::compute_offsets(); 3407 sun_reflect_ConstantPool::compute_offsets(); 3408 sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets(); 3409 java_lang_reflect_Parameter::compute_offsets(); 3410 3411 // generated interpreter code wants to know about the offsets we just computed: 3412 AbstractAssembler::update_delayed_values(); 3413 } 3414 3415 #ifndef PRODUCT 3416 3417 // These functions exist to assert the validity of hard-coded field offsets to guard 3418 // against changes in the class files 3419 3420 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 3421 EXCEPTION_MARK; 3422 fieldDescriptor fd; 3423 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3424 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3425 instanceKlassHandle h_klass (THREAD, k); 3426 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3427 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3428 if (!h_klass->find_local_field(f_name, f_sig, &fd)) { 3429 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 3430 return false; 3431 } 3432 if (fd.is_static()) { 3433 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 3434 return false; 3435 } 3436 if (fd.offset() == hardcoded_offset ) { 3437 return true; 3438 } else { 3439 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.", 3440 klass_name, field_name, hardcoded_offset, fd.offset()); 3441 return false; 3442 } 3443 } 3444 3445 3446 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 3447 EXCEPTION_MARK; 3448 fieldDescriptor fd; 3449 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3450 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3451 instanceKlassHandle h_klass (THREAD, k); 3452 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3453 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3454 if (!h_klass->find_local_field(f_name, f_sig, &fd)) { 3455 tty->print_cr("Static field %s.%s not found", klass_name, field_name); 3456 return false; 3457 } 3458 if (!fd.is_static()) { 3459 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name); 3460 return false; 3461 } 3462 if (fd.offset() == hardcoded_offset + InstanceMirrorKlass::offset_of_static_fields()) { 3463 return true; 3464 } else { 3465 tty->print_cr("Offset of static field %s.%s is hardcoded as %d but should really be %d.", klass_name, field_name, hardcoded_offset, fd.offset() - InstanceMirrorKlass::offset_of_static_fields()); 3466 return false; 3467 } 3468 } 3469 3470 3471 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) { 3472 EXCEPTION_MARK; 3473 fieldDescriptor fd; 3474 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3475 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3476 instanceKlassHandle h_klass (THREAD, k); 3477 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3478 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3479 if (!h_klass->find_local_field(f_name, f_sig, &fd)) { 3480 tty->print_cr("Static field %s.%s not found", klass_name, field_name); 3481 return false; 3482 } 3483 if (!fd.is_static() || !fd.has_initial_value()) { 3484 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name); 3485 return false; 3486 } 3487 if (!fd.initial_value_tag().is_int()) { 3488 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name); 3489 return false; 3490 } 3491 jint field_value = fd.int_initial_value(); 3492 if (field_value == hardcoded_constant) { 3493 return true; 3494 } else { 3495 tty->print_cr("Constant value of static field %s.%s is hardcoded as %d but should really be %d.", klass_name, field_name, hardcoded_constant, field_value); 3496 return false; 3497 } 3498 } 3499 3500 3501 // Check the hard-coded field offsets of all the classes in this file 3502 3503 void JavaClasses::check_offsets() { 3504 bool valid = true; 3505 HandleMark hm; 3506 3507 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3508 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig) 3509 3510 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3511 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig) 3512 3513 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3514 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig) 3515 3516 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \ 3517 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig) 3518 3519 // java.lang.String 3520 3521 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C"); 3522 if (java_lang_String::has_offset_field()) { 3523 CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I"); 3524 CHECK_OFFSET("java/lang/String", java_lang_String, count, "I"); 3525 } 3526 if (java_lang_String::has_hash_field()) { 3527 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I"); 3528 } 3529 3530 // java.lang.Class 3531 3532 // Fake fields 3533 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked 3534 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked 3535 3536 // java.lang.Throwable 3537 3538 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;"); 3539 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;"); 3540 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;"); 3541 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;"); 3542 3543 // Boxed primitive objects (java_lang_boxing_object) 3544 3545 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 3546 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 3547 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 3548 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 3549 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 3550 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 3551 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 3552 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 3553 3554 // java.lang.ClassLoader 3555 3556 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;"); 3557 3558 // java.lang.System 3559 3560 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;"); 3561 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;"); 3562 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;"); 3563 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, security, "Ljava/lang/SecurityManager;"); 3564 3565 // java.lang.StackTraceElement 3566 3567 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;"); 3568 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;"); 3569 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;"); 3570 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I"); 3571 3572 // java.lang.ref.Reference 3573 3574 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;"); 3575 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;"); 3576 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;"); 3577 // Fake field 3578 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;"); 3579 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;"); 3580 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;"); 3581 3582 // java.lang.ref.SoftReference 3583 3584 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J"); 3585 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J"); 3586 3587 // java.lang.AssertionStatusDirectives 3588 // 3589 // The CheckAssertionStatusDirectives boolean can be removed from here and 3590 // globals.hpp after the AssertionStatusDirectives class has been integrated 3591 // into merlin "for some time." Without it, the vm will fail with early 3592 // merlin builds. 3593 3594 if (CheckAssertionStatusDirectives) { 3595 const char* nm = "java/lang/AssertionStatusDirectives"; 3596 const char* sig = "[Ljava/lang/String;"; 3597 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig); 3598 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z"); 3599 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig); 3600 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z"); 3601 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z"); 3602 } 3603 3604 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed"); 3605 } 3606 3607 #endif // PRODUCT 3608 3609 int InjectedField::compute_offset() { 3610 Klass* klass_oop = klass(); 3611 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) { 3612 if (!may_be_java && !fs.access_flags().is_internal()) { 3613 // Only look at injected fields 3614 continue; 3615 } 3616 if (fs.name() == name() && fs.signature() == signature()) { 3617 return fs.offset(); 3618 } 3619 } 3620 ResourceMark rm; 3621 tty->print_cr("Invalid layout of %s at %s/%s%s", InstanceKlass::cast(klass_oop)->external_name(), name()->as_C_string(), signature()->as_C_string(), may_be_java ? " (may_be_java)" : ""); 3622 #ifndef PRODUCT 3623 klass_oop->print(); 3624 tty->print_cr("all fields:"); 3625 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) { 3626 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 3627 } 3628 #endif //PRODUCT 3629 fatal("Invalid layout of preloaded class"); 3630 return -1; 3631 } 3632 3633 void javaClasses_init() { 3634 JavaClasses::compute_offsets(); 3635 JavaClasses::check_offsets(); 3636 FilteredFieldsMap::initialize(); // must be done after computing offsets. 3637 }