1 /* 2 * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "classfile/altHashing.hpp" 27 #include "classfile/javaClasses.inline.hpp" 28 #include "classfile/stringTable.hpp" 29 #include "classfile/vmSymbols.hpp" 30 #include "code/debugInfo.hpp" 31 #include "code/pcDesc.hpp" 32 #include "interpreter/interpreter.hpp" 33 #include "memory/oopFactory.hpp" 34 #include "memory/resourceArea.hpp" 35 #include "memory/universe.inline.hpp" 36 #include "oops/fieldStreams.hpp" 37 #include "oops/instanceKlass.hpp" 38 #include "oops/instanceMirrorKlass.hpp" 39 #include "oops/klass.hpp" 40 #include "oops/method.hpp" 41 #include "oops/objArrayOop.inline.hpp" 42 #include "oops/oop.inline.hpp" 43 #include "oops/symbol.hpp" 44 #include "oops/typeArrayOop.hpp" 45 #include "prims/jvmtiRedefineClassesTrace.hpp" 46 #include "runtime/fieldDescriptor.hpp" 47 #include "runtime/handles.inline.hpp" 48 #include "runtime/interfaceSupport.hpp" 49 #include "runtime/java.hpp" 50 #include "runtime/javaCalls.hpp" 51 #include "runtime/safepoint.hpp" 52 #include "runtime/thread.inline.hpp" 53 #include "runtime/vframe.hpp" 54 #include "utilities/preserveException.hpp" 55 56 #if INCLUDE_JVMCI 57 #include "jvmci/jvmciJavaClasses.hpp" 58 #endif 59 60 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \ 61 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum); 62 63 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \ 64 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java }, 65 66 InjectedField JavaClasses::_injected_fields[] = { 67 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD) 68 }; 69 70 int JavaClasses::compute_injected_offset(InjectedFieldID id) { 71 return _injected_fields[id].compute_offset(); 72 } 73 74 75 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) { 76 *field_count = 0; 77 78 vmSymbols::SID sid = vmSymbols::find_sid(class_name); 79 if (sid == vmSymbols::NO_SID) { 80 // Only well known classes can inject fields 81 return NULL; 82 } 83 84 int count = 0; 85 int start = -1; 86 87 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \ 88 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \ 89 count++; \ 90 if (start == -1) start = klass##_##name##_enum; \ 91 } 92 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD); 93 #undef LOOKUP_INJECTED_FIELD 94 95 if (start != -1) { 96 *field_count = count; 97 return _injected_fields + start; 98 } 99 return NULL; 100 } 101 102 103 static bool find_field(InstanceKlass* ik, 104 Symbol* name_symbol, Symbol* signature_symbol, 105 fieldDescriptor* fd, 106 bool is_static = false, bool allow_super = false) { 107 if (allow_super || is_static) { 108 return ik->find_field(name_symbol, signature_symbol, is_static, fd) != NULL; 109 } else { 110 return ik->find_local_field(name_symbol, signature_symbol, fd); 111 } 112 } 113 114 // Helpful routine for computing field offsets at run time rather than hardcoding them 115 static void 116 compute_offset(int &dest_offset, 117 Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol, 118 bool is_static = false, bool allow_super = false) { 119 fieldDescriptor fd; 120 InstanceKlass* ik = InstanceKlass::cast(klass_oop); 121 if (!find_field(ik, name_symbol, signature_symbol, &fd, is_static, allow_super)) { 122 ResourceMark rm; 123 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string()); 124 #ifndef PRODUCT 125 klass_oop->print(); 126 tty->print_cr("all fields:"); 127 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) { 128 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 129 } 130 #endif //PRODUCT 131 vm_exit_during_initialization("Invalid layout of preloaded class: use -XX:+TraceClassLoading to see the origin of the problem class"); 132 } 133 dest_offset = fd.offset(); 134 } 135 136 // Same as above but for "optional" offsets that might not be present in certain JDK versions 137 static void 138 compute_optional_offset(int& dest_offset, 139 Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol, 140 bool allow_super = false) { 141 fieldDescriptor fd; 142 InstanceKlass* ik = InstanceKlass::cast(klass_oop); 143 if (find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) { 144 dest_offset = fd.offset(); 145 } 146 } 147 148 149 int java_lang_String::value_offset = 0; 150 int java_lang_String::offset_offset = 0; 151 int java_lang_String::count_offset = 0; 152 int java_lang_String::hash_offset = 0; 153 154 bool java_lang_String::initialized = false; 155 156 bool java_lang_String::is_instance(oop obj) { 157 return is_instance_inlined(obj); 158 } 159 160 void java_lang_String::compute_offsets() { 161 assert(!initialized, "offsets should be initialized only once"); 162 163 Klass* k = SystemDictionary::String_klass(); 164 compute_offset(value_offset, k, vmSymbols::value_name(), vmSymbols::char_array_signature()); 165 compute_optional_offset(offset_offset, k, vmSymbols::offset_name(), vmSymbols::int_signature()); 166 compute_optional_offset(count_offset, k, vmSymbols::count_name(), vmSymbols::int_signature()); 167 compute_optional_offset(hash_offset, k, vmSymbols::hash_name(), vmSymbols::int_signature()); 168 169 initialized = true; 170 } 171 172 Handle java_lang_String::basic_create(int length, TRAPS) { 173 assert(initialized, "Must be initialized"); 174 // Create the String object first, so there's a chance that the String 175 // and the char array it points to end up in the same cache line. 176 oop obj; 177 obj = InstanceKlass::cast(SystemDictionary::String_klass())->allocate_instance(CHECK_NH); 178 179 // Create the char array. The String object must be handlized here 180 // because GC can happen as a result of the allocation attempt. 181 Handle h_obj(THREAD, obj); 182 typeArrayOop buffer; 183 buffer = oopFactory::new_charArray(length, CHECK_NH); 184 185 // Point the String at the char array 186 obj = h_obj(); 187 set_value(obj, buffer); 188 // No need to zero the offset, allocation zero'ed the entire String object 189 assert(offset(obj) == 0, "initial String offset should be zero"); 190 //set_offset(obj, 0); 191 set_count(obj, length); 192 193 return h_obj; 194 } 195 196 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) { 197 Handle h_obj = basic_create(length, CHECK_NH); 198 typeArrayOop buffer = value(h_obj()); 199 for (int index = 0; index < length; index++) { 200 buffer->char_at_put(index, unicode[index]); 201 } 202 return h_obj; 203 } 204 205 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) { 206 Handle h_obj = create_from_unicode(unicode, length, CHECK_0); 207 return h_obj(); 208 } 209 210 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) { 211 if (utf8_str == NULL) { 212 return Handle(); 213 } 214 int length = UTF8::unicode_length(utf8_str); 215 Handle h_obj = basic_create(length, CHECK_NH); 216 if (length > 0) { 217 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 218 } 219 return h_obj; 220 } 221 222 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) { 223 Handle h_obj = create_from_str(utf8_str, CHECK_0); 224 return h_obj(); 225 } 226 227 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) { 228 int length = UTF8::unicode_length((char*)symbol->bytes(), symbol->utf8_length()); 229 Handle h_obj = basic_create(length, CHECK_NH); 230 if (length > 0) { 231 UTF8::convert_to_unicode((char*)symbol->bytes(), value(h_obj())->char_at_addr(0), length); 232 } 233 return h_obj; 234 } 235 236 // Converts a C string to a Java String based on current encoding 237 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) { 238 assert(str != NULL, "bad arguments"); 239 240 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *); 241 static to_java_string_fn_t _to_java_string_fn = NULL; 242 243 if (_to_java_string_fn == NULL) { 244 void *lib_handle = os::native_java_library(); 245 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform")); 246 if (_to_java_string_fn == NULL) { 247 fatal("NewStringPlatform missing"); 248 } 249 } 250 251 jstring js = NULL; 252 { JavaThread* thread = (JavaThread*)THREAD; 253 assert(thread->is_Java_thread(), "must be java thread"); 254 HandleMark hm(thread); 255 ThreadToNativeFromVM ttn(thread); 256 js = (_to_java_string_fn)(thread->jni_environment(), str); 257 } 258 return Handle(THREAD, JNIHandles::resolve(js)); 259 } 260 261 // Converts a Java String to a native C string that can be used for 262 // native OS calls. 263 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) { 264 265 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*); 266 static to_platform_string_fn_t _to_platform_string_fn = NULL; 267 268 if (_to_platform_string_fn == NULL) { 269 void *lib_handle = os::native_java_library(); 270 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars")); 271 if (_to_platform_string_fn == NULL) { 272 fatal("GetStringPlatformChars missing"); 273 } 274 } 275 276 char *native_platform_string; 277 { JavaThread* thread = (JavaThread*)THREAD; 278 assert(thread->is_Java_thread(), "must be java thread"); 279 JNIEnv *env = thread->jni_environment(); 280 jstring js = (jstring) JNIHandles::make_local(env, java_string()); 281 bool is_copy; 282 HandleMark hm(thread); 283 ThreadToNativeFromVM ttn(thread); 284 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy); 285 assert(is_copy == JNI_TRUE, "is_copy value changed"); 286 JNIHandles::destroy_local(js); 287 } 288 return native_platform_string; 289 } 290 291 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) { 292 oop obj = java_string(); 293 // Typical usage is to convert all '/' to '.' in string. 294 typeArrayOop value = java_lang_String::value(obj); 295 int offset = java_lang_String::offset(obj); 296 int length = java_lang_String::length(obj); 297 298 // First check if any from_char exist 299 int index; // Declared outside, used later 300 for (index = 0; index < length; index++) { 301 if (value->char_at(index + offset) == from_char) { 302 break; 303 } 304 } 305 if (index == length) { 306 // No from_char, so do not copy. 307 return java_string; 308 } 309 310 // Create new UNICODE buffer. Must handlize value because GC 311 // may happen during String and char array creation. 312 typeArrayHandle h_value(THREAD, value); 313 Handle string = basic_create(length, CHECK_NH); 314 315 typeArrayOop from_buffer = h_value(); 316 typeArrayOop to_buffer = java_lang_String::value(string()); 317 318 // Copy contents 319 for (index = 0; index < length; index++) { 320 jchar c = from_buffer->char_at(index + offset); 321 if (c == from_char) { 322 c = to_char; 323 } 324 to_buffer->char_at_put(index, c); 325 } 326 return string; 327 } 328 329 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) { 330 typeArrayOop value = java_lang_String::value(java_string); 331 int offset = java_lang_String::offset(java_string); 332 length = java_lang_String::length(java_string); 333 334 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length); 335 if (result != NULL) { 336 for (int index = 0; index < length; index++) { 337 result[index] = value->char_at(index + offset); 338 } 339 } else { 340 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string"); 341 } 342 return result; 343 } 344 345 unsigned int java_lang_String::hash_code(oop java_string) { 346 int length = java_lang_String::length(java_string); 347 // Zero length string will hash to zero with String.hashCode() function. 348 if (length == 0) return 0; 349 350 typeArrayOop value = java_lang_String::value(java_string); 351 int offset = java_lang_String::offset(java_string); 352 return java_lang_String::hash_code(value->char_at_addr(offset), length); 353 } 354 355 char* java_lang_String::as_quoted_ascii(oop java_string) { 356 typeArrayOop value = java_lang_String::value(java_string); 357 int offset = java_lang_String::offset(java_string); 358 int length = java_lang_String::length(java_string); 359 360 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset); 361 if (base == NULL) return NULL; 362 363 int result_length = UNICODE::quoted_ascii_length(base, length) + 1; 364 char* result = NEW_RESOURCE_ARRAY(char, result_length); 365 UNICODE::as_quoted_ascii(base, length, result, result_length); 366 assert(result_length >= length + 1, "must not be shorter"); 367 assert(result_length == (int)strlen(result) + 1, "must match"); 368 return result; 369 } 370 371 unsigned int java_lang_String::hash_string(oop java_string) { 372 int length = java_lang_String::length(java_string); 373 // Zero length string doesn't hash necessarily hash to zero. 374 if (length == 0) { 375 return StringTable::hash_string(NULL, 0); 376 } 377 378 typeArrayOop value = java_lang_String::value(java_string); 379 int offset = java_lang_String::offset(java_string); 380 return StringTable::hash_string(value->char_at_addr(offset), length); 381 } 382 383 Symbol* java_lang_String::as_symbol(Handle java_string, TRAPS) { 384 oop obj = java_string(); 385 typeArrayOop value = java_lang_String::value(obj); 386 int offset = java_lang_String::offset(obj); 387 int length = java_lang_String::length(obj); 388 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset); 389 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD); 390 return sym; 391 } 392 393 Symbol* java_lang_String::as_symbol_or_null(oop java_string) { 394 typeArrayOop value = java_lang_String::value(java_string); 395 int offset = java_lang_String::offset(java_string); 396 int length = java_lang_String::length(java_string); 397 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset); 398 return SymbolTable::probe_unicode(base, length); 399 } 400 401 402 int java_lang_String::utf8_length(oop java_string) { 403 typeArrayOop value = java_lang_String::value(java_string); 404 int offset = java_lang_String::offset(java_string); 405 int length = java_lang_String::length(java_string); 406 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset); 407 return UNICODE::utf8_length(position, length); 408 } 409 410 char* java_lang_String::as_utf8_string(oop java_string) { 411 typeArrayOop value = java_lang_String::value(java_string); 412 int offset = java_lang_String::offset(java_string); 413 int length = java_lang_String::length(java_string); 414 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset); 415 return UNICODE::as_utf8(position, length); 416 } 417 418 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) { 419 typeArrayOop value = java_lang_String::value(java_string); 420 int offset = java_lang_String::offset(java_string); 421 int length = java_lang_String::length(java_string); 422 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset); 423 return UNICODE::as_utf8(position, length, buf, buflen); 424 } 425 426 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) { 427 typeArrayOop value = java_lang_String::value(java_string); 428 int offset = java_lang_String::offset(java_string); 429 int length = java_lang_String::length(java_string); 430 assert(start + len <= length, "just checking"); 431 jchar* position = value->char_at_addr(offset + start); 432 return UNICODE::as_utf8(position, len); 433 } 434 435 char* java_lang_String::as_utf8_string(oop java_string, int start, int len, char* buf, int buflen) { 436 typeArrayOop value = java_lang_String::value(java_string); 437 int offset = java_lang_String::offset(java_string); 438 int length = java_lang_String::length(java_string); 439 assert(start + len <= length, "just checking"); 440 jchar* position = value->char_at_addr(offset + start); 441 return UNICODE::as_utf8(position, len, buf, buflen); 442 } 443 444 bool java_lang_String::equals(oop java_string, jchar* chars, int len) { 445 assert(java_string->klass() == SystemDictionary::String_klass(), 446 "must be java_string"); 447 typeArrayOop value = java_lang_String::value(java_string); 448 int offset = java_lang_String::offset(java_string); 449 int length = java_lang_String::length(java_string); 450 if (length != len) { 451 return false; 452 } 453 for (int i = 0; i < len; i++) { 454 if (value->char_at(i + offset) != chars[i]) { 455 return false; 456 } 457 } 458 return true; 459 } 460 461 bool java_lang_String::equals(oop str1, oop str2) { 462 assert(str1->klass() == SystemDictionary::String_klass(), 463 "must be java String"); 464 assert(str2->klass() == SystemDictionary::String_klass(), 465 "must be java String"); 466 typeArrayOop value1 = java_lang_String::value(str1); 467 int offset1 = java_lang_String::offset(str1); 468 int length1 = java_lang_String::length(str1); 469 typeArrayOop value2 = java_lang_String::value(str2); 470 int offset2 = java_lang_String::offset(str2); 471 int length2 = java_lang_String::length(str2); 472 473 if (length1 != length2) { 474 return false; 475 } 476 for (int i = 0; i < length1; i++) { 477 if (value1->char_at(i + offset1) != value2->char_at(i + offset2)) { 478 return false; 479 } 480 } 481 return true; 482 } 483 484 void java_lang_String::print(oop java_string, outputStream* st) { 485 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string"); 486 typeArrayOop value = java_lang_String::value(java_string); 487 488 if (value == NULL) { 489 // This can happen if, e.g., printing a String 490 // object before its initializer has been called 491 st->print("NULL"); 492 return; 493 } 494 495 int offset = java_lang_String::offset(java_string); 496 int length = java_lang_String::length(java_string); 497 498 st->print("\""); 499 for (int index = 0; index < length; index++) { 500 st->print("%c", value->char_at(index + offset)); 501 } 502 st->print("\""); 503 } 504 505 506 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 507 assert(mirror.not_null() && fd->is_static(), "just checking"); 508 if (fd->has_initial_value()) { 509 BasicType t = fd->field_type(); 510 switch (t) { 511 case T_BYTE: 512 mirror()->byte_field_put(fd->offset(), fd->int_initial_value()); 513 break; 514 case T_BOOLEAN: 515 mirror()->bool_field_put(fd->offset(), fd->int_initial_value()); 516 break; 517 case T_CHAR: 518 mirror()->char_field_put(fd->offset(), fd->int_initial_value()); 519 break; 520 case T_SHORT: 521 mirror()->short_field_put(fd->offset(), fd->int_initial_value()); 522 break; 523 case T_INT: 524 mirror()->int_field_put(fd->offset(), fd->int_initial_value()); 525 break; 526 case T_FLOAT: 527 mirror()->float_field_put(fd->offset(), fd->float_initial_value()); 528 break; 529 case T_DOUBLE: 530 mirror()->double_field_put(fd->offset(), fd->double_initial_value()); 531 break; 532 case T_LONG: 533 mirror()->long_field_put(fd->offset(), fd->long_initial_value()); 534 break; 535 case T_OBJECT: 536 { 537 #ifdef ASSERT 538 TempNewSymbol sym = SymbolTable::new_symbol("Ljava/lang/String;", CHECK); 539 assert(fd->signature() == sym, "just checking"); 540 #endif 541 oop string = fd->string_initial_value(CHECK); 542 mirror()->obj_field_put(fd->offset(), string); 543 } 544 break; 545 default: 546 THROW_MSG(vmSymbols::java_lang_ClassFormatError(), 547 "Illegal ConstantValue attribute in class file"); 548 } 549 } 550 } 551 552 553 void java_lang_Class::fixup_mirror(KlassHandle k, TRAPS) { 554 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already"); 555 556 // If the offset was read from the shared archive, it was fixed up already 557 if (!k->is_shared()) { 558 if (k->oop_is_instance()) { 559 // During bootstrap, java.lang.Class wasn't loaded so static field 560 // offsets were computed without the size added it. Go back and 561 // update all the static field offsets to included the size. 562 for (JavaFieldStream fs(InstanceKlass::cast(k())); !fs.done(); fs.next()) { 563 if (fs.access_flags().is_static()) { 564 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields(); 565 fs.set_offset(real_offset); 566 } 567 } 568 } 569 } 570 create_mirror(k, Handle(NULL), Handle(NULL), CHECK); 571 } 572 573 void java_lang_Class::initialize_mirror_fields(KlassHandle k, 574 Handle mirror, 575 Handle protection_domain, 576 TRAPS) { 577 // Allocate a simple java object for a lock. 578 // This needs to be a java object because during class initialization 579 // it can be held across a java call. 580 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK); 581 set_init_lock(mirror(), r); 582 583 // Set protection domain also 584 set_protection_domain(mirror(), protection_domain()); 585 586 // Initialize static fields 587 InstanceKlass::cast(k())->do_local_static_fields(&initialize_static_field, mirror, CHECK); 588 } 589 590 void java_lang_Class::create_mirror(KlassHandle k, Handle class_loader, 591 Handle protection_domain, TRAPS) { 592 assert(k->java_mirror() == NULL, "should only assign mirror once"); 593 // Use this moment of initialization to cache modifier_flags also, 594 // to support Class.getModifiers(). Instance classes recalculate 595 // the cached flags after the class file is parsed, but before the 596 // class is put into the system dictionary. 597 int computed_modifiers = k->compute_modifier_flags(CHECK); 598 k->set_modifier_flags(computed_modifiers); 599 // Class_klass has to be loaded because it is used to allocate 600 // the mirror. 601 if (SystemDictionary::Class_klass_loaded()) { 602 // Allocate mirror (java.lang.Class instance) 603 Handle mirror = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK); 604 605 // Setup indirection from mirror->klass 606 if (!k.is_null()) { 607 java_lang_Class::set_klass(mirror(), k()); 608 } 609 610 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass()); 611 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set"); 612 613 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror())); 614 615 // It might also have a component mirror. This mirror must already exist. 616 if (k->oop_is_array()) { 617 Handle comp_mirror; 618 if (k->oop_is_typeArray()) { 619 BasicType type = TypeArrayKlass::cast(k())->element_type(); 620 comp_mirror = Universe::java_mirror(type); 621 } else { 622 assert(k->oop_is_objArray(), "Must be"); 623 Klass* element_klass = ObjArrayKlass::cast(k())->element_klass(); 624 assert(element_klass != NULL, "Must have an element klass"); 625 comp_mirror = element_klass->java_mirror(); 626 } 627 assert(comp_mirror.not_null(), "must have a mirror"); 628 629 // Two-way link between the array klass and its component mirror: 630 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k 631 set_component_mirror(mirror(), comp_mirror()); 632 set_array_klass(comp_mirror(), k()); 633 } else { 634 assert(k->oop_is_instance(), "Must be"); 635 636 initialize_mirror_fields(k, mirror, protection_domain, THREAD); 637 if (HAS_PENDING_EXCEPTION) { 638 // If any of the fields throws an exception like OOM remove the klass field 639 // from the mirror so GC doesn't follow it after the klass has been deallocated. 640 // This mirror looks like a primitive type, which logically it is because it 641 // it represents no class. 642 java_lang_Class::set_klass(mirror(), NULL); 643 return; 644 } 645 } 646 647 // set the classLoader field in the java_lang_Class instance 648 assert(class_loader() == k->class_loader(), "should be same"); 649 set_class_loader(mirror(), class_loader()); 650 651 // Setup indirection from klass->mirror last 652 // after any exceptions can happen during allocations. 653 if (!k.is_null()) { 654 k->set_java_mirror(mirror()); 655 } 656 } else { 657 if (fixup_mirror_list() == NULL) { 658 GrowableArray<Klass*>* list = 659 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true); 660 set_fixup_mirror_list(list); 661 } 662 fixup_mirror_list()->push(k()); 663 } 664 } 665 666 667 int java_lang_Class::oop_size(oop java_class) { 668 assert(_oop_size_offset != 0, "must be set"); 669 return java_class->int_field(_oop_size_offset); 670 } 671 void java_lang_Class::set_oop_size(oop java_class, int size) { 672 assert(_oop_size_offset != 0, "must be set"); 673 java_class->int_field_put(_oop_size_offset, size); 674 } 675 int java_lang_Class::static_oop_field_count(oop java_class) { 676 assert(_static_oop_field_count_offset != 0, "must be set"); 677 return java_class->int_field(_static_oop_field_count_offset); 678 } 679 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) { 680 assert(_static_oop_field_count_offset != 0, "must be set"); 681 java_class->int_field_put(_static_oop_field_count_offset, size); 682 } 683 684 oop java_lang_Class::protection_domain(oop java_class) { 685 assert(_protection_domain_offset != 0, "must be set"); 686 return java_class->obj_field(_protection_domain_offset); 687 } 688 void java_lang_Class::set_protection_domain(oop java_class, oop pd) { 689 assert(_protection_domain_offset != 0, "must be set"); 690 java_class->obj_field_put(_protection_domain_offset, pd); 691 } 692 693 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) { 694 assert(_component_mirror_offset != 0, "must be set"); 695 java_class->obj_field_put(_component_mirror_offset, comp_mirror); 696 } 697 oop java_lang_Class::component_mirror(oop java_class) { 698 assert(_component_mirror_offset != 0, "must be set"); 699 return java_class->obj_field(_component_mirror_offset); 700 } 701 702 oop java_lang_Class::init_lock(oop java_class) { 703 assert(_init_lock_offset != 0, "must be set"); 704 return java_class->obj_field(_init_lock_offset); 705 } 706 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) { 707 assert(_init_lock_offset != 0, "must be set"); 708 java_class->obj_field_put(_init_lock_offset, init_lock); 709 } 710 711 objArrayOop java_lang_Class::signers(oop java_class) { 712 assert(_signers_offset != 0, "must be set"); 713 return (objArrayOop)java_class->obj_field(_signers_offset); 714 } 715 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) { 716 assert(_signers_offset != 0, "must be set"); 717 java_class->obj_field_put(_signers_offset, (oop)signers); 718 } 719 720 721 void java_lang_Class::set_class_loader(oop java_class, oop loader) { 722 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet. 723 if (_class_loader_offset != 0) { 724 java_class->obj_field_put(_class_loader_offset, loader); 725 } 726 } 727 728 oop java_lang_Class::class_loader(oop java_class) { 729 assert(_class_loader_offset != 0, "must be set"); 730 return java_class->obj_field(_class_loader_offset); 731 } 732 733 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) { 734 // This should be improved by adding a field at the Java level or by 735 // introducing a new VM klass (see comment in ClassFileParser) 736 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0); 737 if (type != T_VOID) { 738 Klass* aklass = Universe::typeArrayKlassObj(type); 739 assert(aklass != NULL, "correct bootstrap"); 740 set_array_klass(java_class, aklass); 741 } 742 #ifdef ASSERT 743 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass()); 744 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation"); 745 #endif 746 return java_class; 747 } 748 749 750 Klass* java_lang_Class::as_Klass(oop java_class) { 751 //%note memory_2 752 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 753 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset)); 754 assert(k == NULL || k->is_klass(), "type check"); 755 return k; 756 } 757 758 759 void java_lang_Class::set_klass(oop java_class, Klass* klass) { 760 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 761 java_class->metadata_field_put(_klass_offset, klass); 762 } 763 764 765 void java_lang_Class::print_signature(oop java_class, outputStream* st) { 766 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 767 Symbol* name = NULL; 768 bool is_instance = false; 769 if (is_primitive(java_class)) { 770 name = vmSymbols::type_signature(primitive_type(java_class)); 771 } else { 772 Klass* k = as_Klass(java_class); 773 is_instance = k->oop_is_instance(); 774 name = k->name(); 775 } 776 if (name == NULL) { 777 st->print("<null>"); 778 return; 779 } 780 if (is_instance) st->print("L"); 781 st->write((char*) name->base(), (int) name->utf8_length()); 782 if (is_instance) st->print(";"); 783 } 784 785 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) { 786 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 787 Symbol* name; 788 if (is_primitive(java_class)) { 789 name = vmSymbols::type_signature(primitive_type(java_class)); 790 // Because this can create a new symbol, the caller has to decrement 791 // the refcount, so make adjustment here and below for symbols returned 792 // that are not created or incremented due to a successful lookup. 793 name->increment_refcount(); 794 } else { 795 Klass* k = as_Klass(java_class); 796 if (!k->oop_is_instance()) { 797 name = k->name(); 798 name->increment_refcount(); 799 } else { 800 ResourceMark rm; 801 const char* sigstr = k->signature_name(); 802 int siglen = (int) strlen(sigstr); 803 if (!intern_if_not_found) { 804 name = SymbolTable::probe(sigstr, siglen); 805 } else { 806 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 807 } 808 } 809 } 810 return name; 811 } 812 813 // Returns the Java name for this Java mirror (Resource allocated) 814 // See Klass::external_name(). 815 // For primitive type Java mirrors, its type name is returned. 816 const char* java_lang_Class::as_external_name(oop java_class) { 817 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 818 const char* name = NULL; 819 if (is_primitive(java_class)) { 820 name = type2name(primitive_type(java_class)); 821 } else { 822 name = as_Klass(java_class)->external_name(); 823 } 824 if (name == NULL) { 825 name = "<null>"; 826 } 827 return name; 828 } 829 830 Klass* java_lang_Class::array_klass(oop java_class) { 831 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset)); 832 assert(k == NULL || k->is_klass() && k->oop_is_array(), "should be array klass"); 833 return k; 834 } 835 836 837 void java_lang_Class::set_array_klass(oop java_class, Klass* klass) { 838 assert(klass->is_klass() && klass->oop_is_array(), "should be array klass"); 839 java_class->metadata_field_put(_array_klass_offset, klass); 840 } 841 842 843 bool java_lang_Class::is_primitive(oop java_class) { 844 // should assert: 845 //assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 846 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL); 847 848 #ifdef ASSERT 849 if (is_primitive) { 850 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset)); 851 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()), 852 "Should be either the T_VOID primitive or a java primitive"); 853 } 854 #endif 855 856 return is_primitive; 857 } 858 859 860 BasicType java_lang_Class::primitive_type(oop java_class) { 861 assert(java_lang_Class::is_primitive(java_class), "just checking"); 862 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset)); 863 BasicType type = T_VOID; 864 if (ak != NULL) { 865 // Note: create_basic_type_mirror above initializes ak to a non-null value. 866 type = ArrayKlass::cast(ak)->element_type(); 867 } else { 868 assert(java_class == Universe::void_mirror(), "only valid non-array primitive"); 869 } 870 assert(Universe::java_mirror(type) == java_class, "must be consistent"); 871 return type; 872 } 873 874 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) { 875 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 876 if (is_primitive(java_class)) { 877 if (reference_klass != NULL) 878 (*reference_klass) = NULL; 879 return primitive_type(java_class); 880 } else { 881 if (reference_klass != NULL) 882 (*reference_klass) = as_Klass(java_class); 883 return T_OBJECT; 884 } 885 } 886 887 888 oop java_lang_Class::primitive_mirror(BasicType t) { 889 oop mirror = Universe::java_mirror(t); 890 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class"); 891 assert(java_lang_Class::is_primitive(mirror), "must be primitive"); 892 return mirror; 893 } 894 895 bool java_lang_Class::offsets_computed = false; 896 int java_lang_Class::classRedefinedCount_offset = -1; 897 898 void java_lang_Class::compute_offsets() { 899 assert(!offsets_computed, "offsets should be initialized only once"); 900 offsets_computed = true; 901 902 Klass* k = SystemDictionary::Class_klass(); 903 // The classRedefinedCount field is only present starting in 1.5, 904 // so don't go fatal. 905 compute_optional_offset(classRedefinedCount_offset, 906 k, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature()); 907 908 // Needs to be optional because the old build runs Queens during bootstrapping 909 // and jdk8-9 doesn't have coordinated pushes yet. 910 compute_optional_offset(_class_loader_offset, 911 k, vmSymbols::classLoader_name(), 912 vmSymbols::classloader_signature()); 913 914 compute_offset(_component_mirror_offset, 915 k, vmSymbols::componentType_name(), 916 vmSymbols::class_signature()); 917 918 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have 919 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops 920 // GC treats them the same. 921 _init_lock_offset = _component_mirror_offset; 922 923 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 924 } 925 926 int java_lang_Class::classRedefinedCount(oop the_class_mirror) { 927 if (classRedefinedCount_offset == -1) { 928 // If we don't have an offset for it then just return -1 as a marker. 929 return -1; 930 } 931 932 return the_class_mirror->int_field(classRedefinedCount_offset); 933 } 934 935 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) { 936 if (classRedefinedCount_offset == -1) { 937 // If we don't have an offset for it then nothing to set. 938 return; 939 } 940 941 the_class_mirror->int_field_put(classRedefinedCount_offset, value); 942 } 943 944 945 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the 946 // platform thread structure, and a eetop offset which was used for thread 947 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures 948 // merged, so in the HotSpot VM we just use the eetop field for the thread 949 // instead of the privateInfo_offset. 950 // 951 // Note: The stackSize field is only present starting in 1.4. 952 953 int java_lang_Thread::_name_offset = 0; 954 int java_lang_Thread::_group_offset = 0; 955 int java_lang_Thread::_contextClassLoader_offset = 0; 956 int java_lang_Thread::_inheritedAccessControlContext_offset = 0; 957 int java_lang_Thread::_priority_offset = 0; 958 int java_lang_Thread::_eetop_offset = 0; 959 int java_lang_Thread::_daemon_offset = 0; 960 int java_lang_Thread::_stillborn_offset = 0; 961 int java_lang_Thread::_stackSize_offset = 0; 962 int java_lang_Thread::_tid_offset = 0; 963 int java_lang_Thread::_thread_status_offset = 0; 964 int java_lang_Thread::_park_blocker_offset = 0; 965 int java_lang_Thread::_park_event_offset = 0 ; 966 967 968 void java_lang_Thread::compute_offsets() { 969 assert(_group_offset == 0, "offsets should be initialized only once"); 970 971 Klass* k = SystemDictionary::Thread_klass(); 972 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 973 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature()); 974 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature()); 975 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature()); 976 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature()); 977 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature()); 978 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature()); 979 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature()); 980 // The stackSize field is only present starting in 1.4, so don't go fatal. 981 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature()); 982 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal. 983 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature()); 984 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature()); 985 // The parkBlocker field is only present starting in 1.6, so don't go fatal. 986 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature()); 987 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(), 988 vmSymbols::long_signature()); 989 } 990 991 992 JavaThread* java_lang_Thread::thread(oop java_thread) { 993 return (JavaThread*)java_thread->address_field(_eetop_offset); 994 } 995 996 997 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) { 998 java_thread->address_field_put(_eetop_offset, (address)thread); 999 } 1000 1001 1002 oop java_lang_Thread::name(oop java_thread) { 1003 return java_thread->obj_field(_name_offset); 1004 } 1005 1006 1007 void java_lang_Thread::set_name(oop java_thread, oop name) { 1008 java_thread->obj_field_put(_name_offset, name); 1009 } 1010 1011 1012 ThreadPriority java_lang_Thread::priority(oop java_thread) { 1013 return (ThreadPriority)java_thread->int_field(_priority_offset); 1014 } 1015 1016 1017 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) { 1018 java_thread->int_field_put(_priority_offset, priority); 1019 } 1020 1021 1022 oop java_lang_Thread::threadGroup(oop java_thread) { 1023 return java_thread->obj_field(_group_offset); 1024 } 1025 1026 1027 bool java_lang_Thread::is_stillborn(oop java_thread) { 1028 return java_thread->bool_field(_stillborn_offset) != 0; 1029 } 1030 1031 1032 // We never have reason to turn the stillborn bit off 1033 void java_lang_Thread::set_stillborn(oop java_thread) { 1034 java_thread->bool_field_put(_stillborn_offset, true); 1035 } 1036 1037 1038 bool java_lang_Thread::is_alive(oop java_thread) { 1039 JavaThread* thr = java_lang_Thread::thread(java_thread); 1040 return (thr != NULL); 1041 } 1042 1043 1044 bool java_lang_Thread::is_daemon(oop java_thread) { 1045 return java_thread->bool_field(_daemon_offset) != 0; 1046 } 1047 1048 1049 void java_lang_Thread::set_daemon(oop java_thread) { 1050 java_thread->bool_field_put(_daemon_offset, true); 1051 } 1052 1053 oop java_lang_Thread::context_class_loader(oop java_thread) { 1054 return java_thread->obj_field(_contextClassLoader_offset); 1055 } 1056 1057 oop java_lang_Thread::inherited_access_control_context(oop java_thread) { 1058 return java_thread->obj_field(_inheritedAccessControlContext_offset); 1059 } 1060 1061 1062 jlong java_lang_Thread::stackSize(oop java_thread) { 1063 if (_stackSize_offset > 0) { 1064 return java_thread->long_field(_stackSize_offset); 1065 } else { 1066 return 0; 1067 } 1068 } 1069 1070 // Write the thread status value to threadStatus field in java.lang.Thread java class. 1071 void java_lang_Thread::set_thread_status(oop java_thread, 1072 java_lang_Thread::ThreadStatus status) { 1073 // The threadStatus is only present starting in 1.5 1074 if (_thread_status_offset > 0) { 1075 java_thread->int_field_put(_thread_status_offset, status); 1076 } 1077 } 1078 1079 // Read thread status value from threadStatus field in java.lang.Thread java class. 1080 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) { 1081 assert(Thread::current()->is_Watcher_thread() || Thread::current()->is_VM_thread() || 1082 JavaThread::current()->thread_state() == _thread_in_vm, 1083 "Java Thread is not running in vm"); 1084 // The threadStatus is only present starting in 1.5 1085 if (_thread_status_offset > 0) { 1086 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1087 } else { 1088 // All we can easily figure out is if it is alive, but that is 1089 // enough info for a valid unknown status. 1090 // These aren't restricted to valid set ThreadStatus values, so 1091 // use JVMTI values and cast. 1092 JavaThread* thr = java_lang_Thread::thread(java_thread); 1093 if (thr == NULL) { 1094 // the thread hasn't run yet or is in the process of exiting 1095 return NEW; 1096 } 1097 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE; 1098 } 1099 } 1100 1101 1102 jlong java_lang_Thread::thread_id(oop java_thread) { 1103 // The thread ID field is only present starting in 1.5 1104 if (_tid_offset > 0) { 1105 return java_thread->long_field(_tid_offset); 1106 } else { 1107 return 0; 1108 } 1109 } 1110 1111 oop java_lang_Thread::park_blocker(oop java_thread) { 1112 assert(JDK_Version::current().supports_thread_park_blocker() && 1113 _park_blocker_offset != 0, "Must support parkBlocker field"); 1114 1115 if (_park_blocker_offset > 0) { 1116 return java_thread->obj_field(_park_blocker_offset); 1117 } 1118 1119 return NULL; 1120 } 1121 1122 jlong java_lang_Thread::park_event(oop java_thread) { 1123 if (_park_event_offset > 0) { 1124 return java_thread->long_field(_park_event_offset); 1125 } 1126 return 0; 1127 } 1128 1129 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) { 1130 if (_park_event_offset > 0) { 1131 java_thread->long_field_put(_park_event_offset, ptr); 1132 return true; 1133 } 1134 return false; 1135 } 1136 1137 1138 const char* java_lang_Thread::thread_status_name(oop java_thread) { 1139 assert(_thread_status_offset != 0, "Must have thread status"); 1140 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1141 switch (status) { 1142 case NEW : return "NEW"; 1143 case RUNNABLE : return "RUNNABLE"; 1144 case SLEEPING : return "TIMED_WAITING (sleeping)"; 1145 case IN_OBJECT_WAIT : return "WAITING (on object monitor)"; 1146 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)"; 1147 case PARKED : return "WAITING (parking)"; 1148 case PARKED_TIMED : return "TIMED_WAITING (parking)"; 1149 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)"; 1150 case TERMINATED : return "TERMINATED"; 1151 default : return "UNKNOWN"; 1152 }; 1153 } 1154 int java_lang_ThreadGroup::_parent_offset = 0; 1155 int java_lang_ThreadGroup::_name_offset = 0; 1156 int java_lang_ThreadGroup::_threads_offset = 0; 1157 int java_lang_ThreadGroup::_groups_offset = 0; 1158 int java_lang_ThreadGroup::_maxPriority_offset = 0; 1159 int java_lang_ThreadGroup::_destroyed_offset = 0; 1160 int java_lang_ThreadGroup::_daemon_offset = 0; 1161 int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0; 1162 int java_lang_ThreadGroup::_nthreads_offset = 0; 1163 int java_lang_ThreadGroup::_ngroups_offset = 0; 1164 1165 oop java_lang_ThreadGroup::parent(oop java_thread_group) { 1166 assert(java_thread_group->is_oop(), "thread group must be oop"); 1167 return java_thread_group->obj_field(_parent_offset); 1168 } 1169 1170 // ("name as oop" accessor is not necessary) 1171 1172 typeArrayOop java_lang_ThreadGroup::name(oop java_thread_group) { 1173 oop name = java_thread_group->obj_field(_name_offset); 1174 // ThreadGroup.name can be null 1175 return name == NULL ? (typeArrayOop)NULL : java_lang_String::value(name); 1176 } 1177 1178 int java_lang_ThreadGroup::nthreads(oop java_thread_group) { 1179 assert(java_thread_group->is_oop(), "thread group must be oop"); 1180 return java_thread_group->int_field(_nthreads_offset); 1181 } 1182 1183 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) { 1184 oop threads = java_thread_group->obj_field(_threads_offset); 1185 assert(threads != NULL, "threadgroups should have threads"); 1186 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code 1187 return objArrayOop(threads); 1188 } 1189 1190 int java_lang_ThreadGroup::ngroups(oop java_thread_group) { 1191 assert(java_thread_group->is_oop(), "thread group must be oop"); 1192 return java_thread_group->int_field(_ngroups_offset); 1193 } 1194 1195 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) { 1196 oop groups = java_thread_group->obj_field(_groups_offset); 1197 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code 1198 return objArrayOop(groups); 1199 } 1200 1201 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) { 1202 assert(java_thread_group->is_oop(), "thread group must be oop"); 1203 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset); 1204 } 1205 1206 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) { 1207 assert(java_thread_group->is_oop(), "thread group must be oop"); 1208 return java_thread_group->bool_field(_destroyed_offset) != 0; 1209 } 1210 1211 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) { 1212 assert(java_thread_group->is_oop(), "thread group must be oop"); 1213 return java_thread_group->bool_field(_daemon_offset) != 0; 1214 } 1215 1216 bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) { 1217 assert(java_thread_group->is_oop(), "thread group must be oop"); 1218 return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0; 1219 } 1220 1221 void java_lang_ThreadGroup::compute_offsets() { 1222 assert(_parent_offset == 0, "offsets should be initialized only once"); 1223 1224 Klass* k = SystemDictionary::ThreadGroup_klass(); 1225 1226 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature()); 1227 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1228 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature()); 1229 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature()); 1230 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature()); 1231 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature()); 1232 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature()); 1233 compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature()); 1234 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature()); 1235 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature()); 1236 } 1237 1238 oop java_lang_Throwable::unassigned_stacktrace() { 1239 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Throwable_klass()); 1240 address addr = ik->static_field_addr(static_unassigned_stacktrace_offset); 1241 if (UseCompressedOops) { 1242 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 1243 } else { 1244 return oopDesc::load_decode_heap_oop((oop*)addr); 1245 } 1246 } 1247 1248 oop java_lang_Throwable::backtrace(oop throwable) { 1249 return throwable->obj_field_acquire(backtrace_offset); 1250 } 1251 1252 1253 void java_lang_Throwable::set_backtrace(oop throwable, oop value) { 1254 throwable->release_obj_field_put(backtrace_offset, value); 1255 } 1256 1257 1258 oop java_lang_Throwable::message(oop throwable) { 1259 return throwable->obj_field(detailMessage_offset); 1260 } 1261 1262 1263 oop java_lang_Throwable::message(Handle throwable) { 1264 return throwable->obj_field(detailMessage_offset); 1265 } 1266 1267 1268 // Return Symbol for detailed_message or NULL 1269 Symbol* java_lang_Throwable::detail_message(oop throwable) { 1270 PRESERVE_EXCEPTION_MARK; // Keep original exception 1271 oop detailed_message = java_lang_Throwable::message(throwable); 1272 if (detailed_message != NULL) { 1273 return java_lang_String::as_symbol(detailed_message, THREAD); 1274 } 1275 return NULL; 1276 } 1277 1278 void java_lang_Throwable::set_message(oop throwable, oop value) { 1279 throwable->obj_field_put(detailMessage_offset, value); 1280 } 1281 1282 1283 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) { 1284 throwable->obj_field_put(stackTrace_offset, st_element_array); 1285 } 1286 1287 void java_lang_Throwable::clear_stacktrace(oop throwable) { 1288 set_stacktrace(throwable, NULL); 1289 } 1290 1291 1292 void java_lang_Throwable::print(oop throwable, outputStream* st) { 1293 ResourceMark rm; 1294 Klass* k = throwable->klass(); 1295 assert(k != NULL, "just checking"); 1296 st->print("%s", InstanceKlass::cast(k)->external_name()); 1297 oop msg = message(throwable); 1298 if (msg != NULL) { 1299 st->print(": %s", java_lang_String::as_utf8_string(msg)); 1300 } 1301 } 1302 1303 1304 void java_lang_Throwable::print(Handle throwable, outputStream* st) { 1305 ResourceMark rm; 1306 Klass* k = throwable->klass(); 1307 assert(k != NULL, "just checking"); 1308 st->print("%s", InstanceKlass::cast(k)->external_name()); 1309 oop msg = message(throwable); 1310 if (msg != NULL) { 1311 st->print(": %s", java_lang_String::as_utf8_string(msg)); 1312 } 1313 } 1314 1315 // After this many redefines, the stack trace is unreliable. 1316 const int MAX_VERSION = USHRT_MAX; 1317 1318 static inline bool version_matches(Method* method, int version) { 1319 assert(version < MAX_VERSION, "version is too big"); 1320 return method != NULL && (method->constants()->version() == version); 1321 } 1322 1323 // This class provides a simple wrapper over the internal structure of 1324 // exception backtrace to insulate users of the backtrace from needing 1325 // to know what it looks like. 1326 class BacktraceBuilder: public StackObj { 1327 private: 1328 Handle _backtrace; 1329 objArrayOop _head; 1330 typeArrayOop _methods; 1331 typeArrayOop _bcis; 1332 objArrayOop _mirrors; 1333 typeArrayOop _cprefs; // needed to insulate method name against redefinition 1334 int _index; 1335 No_Safepoint_Verifier _nsv; 1336 1337 public: 1338 1339 enum { 1340 trace_methods_offset = java_lang_Throwable::trace_methods_offset, 1341 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset, 1342 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset, 1343 trace_cprefs_offset = java_lang_Throwable::trace_cprefs_offset, 1344 trace_next_offset = java_lang_Throwable::trace_next_offset, 1345 trace_size = java_lang_Throwable::trace_size, 1346 trace_chunk_size = java_lang_Throwable::trace_chunk_size 1347 }; 1348 1349 // get info out of chunks 1350 static typeArrayOop get_methods(objArrayHandle chunk) { 1351 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset)); 1352 assert(methods != NULL, "method array should be initialized in backtrace"); 1353 return methods; 1354 } 1355 static typeArrayOop get_bcis(objArrayHandle chunk) { 1356 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 1357 assert(bcis != NULL, "bci array should be initialized in backtrace"); 1358 return bcis; 1359 } 1360 static objArrayOop get_mirrors(objArrayHandle chunk) { 1361 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset)); 1362 assert(mirrors != NULL, "mirror array should be initialized in backtrace"); 1363 return mirrors; 1364 } 1365 static typeArrayOop get_cprefs(objArrayHandle chunk) { 1366 typeArrayOop cprefs = typeArrayOop(chunk->obj_at(trace_cprefs_offset)); 1367 assert(cprefs != NULL, "cprefs array should be initialized in backtrace"); 1368 return cprefs; 1369 } 1370 1371 // constructor for new backtrace 1372 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL), _cprefs(NULL) { 1373 expand(CHECK); 1374 _backtrace = _head; 1375 _index = 0; 1376 } 1377 1378 BacktraceBuilder(objArrayHandle backtrace) { 1379 _methods = get_methods(backtrace); 1380 _bcis = get_bcis(backtrace); 1381 _mirrors = get_mirrors(backtrace); 1382 _cprefs = get_cprefs(backtrace); 1383 assert(_methods->length() == _bcis->length() && 1384 _methods->length() == _mirrors->length(), 1385 "method and source information arrays should match"); 1386 1387 // head is the preallocated backtrace 1388 _backtrace = _head = backtrace(); 1389 _index = 0; 1390 } 1391 1392 void expand(TRAPS) { 1393 objArrayHandle old_head(THREAD, _head); 1394 Pause_No_Safepoint_Verifier pnsv(&_nsv); 1395 1396 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK); 1397 objArrayHandle new_head(THREAD, head); 1398 1399 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK); 1400 typeArrayHandle new_methods(THREAD, methods); 1401 1402 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK); 1403 typeArrayHandle new_bcis(THREAD, bcis); 1404 1405 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK); 1406 objArrayHandle new_mirrors(THREAD, mirrors); 1407 1408 typeArrayOop cprefs = oopFactory::new_shortArray(trace_chunk_size, CHECK); 1409 typeArrayHandle new_cprefs(THREAD, cprefs); 1410 1411 if (!old_head.is_null()) { 1412 old_head->obj_at_put(trace_next_offset, new_head()); 1413 } 1414 new_head->obj_at_put(trace_methods_offset, new_methods()); 1415 new_head->obj_at_put(trace_bcis_offset, new_bcis()); 1416 new_head->obj_at_put(trace_mirrors_offset, new_mirrors()); 1417 new_head->obj_at_put(trace_cprefs_offset, new_cprefs()); 1418 1419 _head = new_head(); 1420 _methods = new_methods(); 1421 _bcis = new_bcis(); 1422 _mirrors = new_mirrors(); 1423 _cprefs = new_cprefs(); 1424 _index = 0; 1425 } 1426 1427 oop backtrace() { 1428 return _backtrace(); 1429 } 1430 1431 inline void push(Method* method, int bci, TRAPS) { 1432 // Smear the -1 bci to 0 since the array only holds unsigned 1433 // shorts. The later line number lookup would just smear the -1 1434 // to a 0 even if it could be recorded. 1435 if (bci == SynchronizationEntryBCI) bci = 0; 1436 1437 if (_index >= trace_chunk_size) { 1438 methodHandle mhandle(THREAD, method); 1439 expand(CHECK); 1440 method = mhandle(); 1441 } 1442 1443 _methods->short_at_put(_index, method->orig_method_idnum()); 1444 _bcis->int_at_put(_index, BackTrace::merge_bci_and_version(bci, method->constants()->version())); 1445 _cprefs->short_at_put(_index, method->name_index()); 1446 1447 // We need to save the mirrors in the backtrace to keep the class 1448 // from being unloaded while we still have this stack trace. 1449 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror"); 1450 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror()); 1451 _index++; 1452 } 1453 1454 }; 1455 1456 // Print stack trace element to resource allocated buffer 1457 char* java_lang_Throwable::print_stack_element_to_buffer(Handle mirror, 1458 int method_id, int version, int bci, int cpref) { 1459 1460 // Get strings and string lengths 1461 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 1462 const char* klass_name = holder->external_name(); 1463 int buf_len = (int)strlen(klass_name); 1464 1465 Method* method = holder->method_with_orig_idnum(method_id, version); 1466 1467 // The method can be NULL if the requested class version is gone 1468 Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref); 1469 char* method_name = sym->as_C_string(); 1470 buf_len += (int)strlen(method_name); 1471 1472 char* source_file_name = NULL; 1473 Symbol* source = BackTrace::get_source_file_name(holder, version); 1474 if (source != NULL) { 1475 source_file_name = source->as_C_string(); 1476 buf_len += (int)strlen(source_file_name); 1477 } 1478 1479 // Allocate temporary buffer with extra space for formatting and line number 1480 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64); 1481 1482 // Print stack trace line in buffer 1483 sprintf(buf, "\tat %s.%s", klass_name, method_name); 1484 1485 if (!version_matches(method, version)) { 1486 strcat(buf, "(Redefined)"); 1487 } else { 1488 int line_number = BackTrace::get_line_number(method, bci); 1489 if (line_number == -2) { 1490 strcat(buf, "(Native Method)"); 1491 } else { 1492 if (source_file_name != NULL && (line_number != -1)) { 1493 // Sourcename and linenumber 1494 sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number); 1495 } else if (source_file_name != NULL) { 1496 // Just sourcename 1497 sprintf(buf + (int)strlen(buf), "(%s)", source_file_name); 1498 } else { 1499 // Neither sourcename nor linenumber 1500 sprintf(buf + (int)strlen(buf), "(Unknown Source)"); 1501 } 1502 nmethod* nm = method->code(); 1503 if (WizardMode && nm != NULL) { 1504 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm); 1505 } 1506 } 1507 } 1508 1509 return buf; 1510 } 1511 1512 void java_lang_Throwable::print_stack_element(outputStream *st, Handle mirror, 1513 int method_id, int version, int bci, int cpref) { 1514 ResourceMark rm; 1515 char* buf = print_stack_element_to_buffer(mirror, method_id, version, bci, cpref); 1516 st->print_cr("%s", buf); 1517 } 1518 1519 void java_lang_Throwable::print_stack_element(outputStream *st, methodHandle method, int bci) { 1520 Handle mirror = method->method_holder()->java_mirror(); 1521 int method_id = method->orig_method_idnum(); 1522 int version = method->constants()->version(); 1523 int cpref = method->name_index(); 1524 print_stack_element(st, mirror, method_id, version, bci, cpref); 1525 } 1526 1527 const char* java_lang_Throwable::no_stack_trace_message() { 1528 return "\t<<no stack trace available>>"; 1529 } 1530 1531 1532 // Currently used only for exceptions occurring during startup 1533 void java_lang_Throwable::print_stack_trace(oop throwable, outputStream* st) { 1534 Thread *THREAD = Thread::current(); 1535 Handle h_throwable(THREAD, throwable); 1536 while (h_throwable.not_null()) { 1537 objArrayHandle result (THREAD, objArrayOop(backtrace(h_throwable()))); 1538 if (result.is_null()) { 1539 st->print_raw_cr(no_stack_trace_message()); 1540 return; 1541 } 1542 1543 while (result.not_null()) { 1544 1545 // Get method id, bci, version and mirror from chunk 1546 typeArrayHandle methods (THREAD, BacktraceBuilder::get_methods(result)); 1547 typeArrayHandle bcis (THREAD, BacktraceBuilder::get_bcis(result)); 1548 objArrayHandle mirrors (THREAD, BacktraceBuilder::get_mirrors(result)); 1549 typeArrayHandle cprefs (THREAD, BacktraceBuilder::get_cprefs(result)); 1550 1551 int length = methods()->length(); 1552 for (int index = 0; index < length; index++) { 1553 Handle mirror(THREAD, mirrors->obj_at(index)); 1554 // NULL mirror means end of stack trace 1555 if (mirror.is_null()) goto handle_cause; 1556 int method = methods->short_at(index); 1557 int version = BackTrace::version_at(bcis->int_at(index)); 1558 int bci = BackTrace::bci_at(bcis->int_at(index)); 1559 int cpref = cprefs->short_at(index); 1560 print_stack_element(st, mirror, method, version, bci, cpref); 1561 } 1562 result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset))); 1563 } 1564 handle_cause: 1565 { 1566 EXCEPTION_MARK; 1567 JavaValue cause(T_OBJECT); 1568 JavaCalls::call_virtual(&cause, 1569 h_throwable, 1570 KlassHandle(THREAD, h_throwable->klass()), 1571 vmSymbols::getCause_name(), 1572 vmSymbols::void_throwable_signature(), 1573 THREAD); 1574 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 1575 if (HAS_PENDING_EXCEPTION) { 1576 CLEAR_PENDING_EXCEPTION; 1577 h_throwable = Handle(); 1578 } else { 1579 h_throwable = Handle(THREAD, (oop) cause.get_jobject()); 1580 if (h_throwable.not_null()) { 1581 st->print("Caused by: "); 1582 print(h_throwable, st); 1583 st->cr(); 1584 } 1585 } 1586 } 1587 } 1588 } 1589 1590 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS) { 1591 if (!StackTraceInThrowable) return; 1592 ResourceMark rm(THREAD); 1593 1594 // Start out by clearing the backtrace for this object, in case the VM 1595 // runs out of memory while allocating the stack trace 1596 set_backtrace(throwable(), NULL); 1597 // Clear lazily constructed Java level stacktrace if refilling occurs 1598 // This is unnecessary in 1.7+ but harmless 1599 clear_stacktrace(throwable()); 1600 1601 int max_depth = MaxJavaStackTraceDepth; 1602 JavaThread* thread = (JavaThread*)THREAD; 1603 BacktraceBuilder bt(CHECK); 1604 1605 // If there is no Java frame just return the method that was being called 1606 // with bci 0 1607 if (!thread->has_last_Java_frame()) { 1608 if (max_depth >= 1 && method() != NULL) { 1609 bt.push(method(), 0, CHECK); 1610 set_backtrace(throwable(), bt.backtrace()); 1611 } 1612 return; 1613 } 1614 1615 // Instead of using vframe directly, this version of fill_in_stack_trace 1616 // basically handles everything by hand. This significantly improved the 1617 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows. 1618 // See bug 6333838 for more details. 1619 // The "ASSERT" here is to verify this method generates the exactly same stack 1620 // trace as utilizing vframe. 1621 #ifdef ASSERT 1622 vframeStream st(thread); 1623 methodHandle st_method(THREAD, st.method()); 1624 #endif 1625 int total_count = 0; 1626 RegisterMap map(thread, false); 1627 int decode_offset = 0; 1628 nmethod* nm = NULL; 1629 bool skip_fillInStackTrace_check = false; 1630 bool skip_throwableInit_check = false; 1631 bool skip_hidden = !ShowHiddenFrames; 1632 1633 for (frame fr = thread->last_frame(); max_depth != total_count;) { 1634 Method* method = NULL; 1635 int bci = 0; 1636 1637 // Compiled java method case. 1638 if (decode_offset != 0) { 1639 DebugInfoReadStream stream(nm, decode_offset); 1640 decode_offset = stream.read_int(); 1641 method = (Method*)nm->metadata_at(stream.read_int()); 1642 bci = stream.read_bci(); 1643 } else { 1644 if (fr.is_first_frame()) break; 1645 address pc = fr.pc(); 1646 if (fr.is_interpreted_frame()) { 1647 address bcp = fr.interpreter_frame_bcp(); 1648 method = fr.interpreter_frame_method(); 1649 bci = method->bci_from(bcp); 1650 fr = fr.sender(&map); 1651 } else { 1652 CodeBlob* cb = fr.cb(); 1653 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL 1654 // but non nmethod 1655 fr = fr.sender(&map); 1656 if (cb == NULL || !cb->is_nmethod()) { 1657 continue; 1658 } 1659 nm = (nmethod*)cb; 1660 if (nm->method()->is_native()) { 1661 method = nm->method(); 1662 bci = 0; 1663 } else { 1664 PcDesc* pd = nm->pc_desc_at(pc); 1665 decode_offset = pd->scope_decode_offset(); 1666 // if decode_offset is not equal to 0, it will execute the 1667 // "compiled java method case" at the beginning of the loop. 1668 continue; 1669 } 1670 } 1671 } 1672 #ifdef ASSERT 1673 assert(st_method() == method && st.bci() == bci, 1674 "Wrong stack trace"); 1675 st.next(); 1676 // vframeStream::method isn't GC-safe so store off a copy 1677 // of the Method* in case we GC. 1678 if (!st.at_end()) { 1679 st_method = st.method(); 1680 } 1681 #endif 1682 1683 // the format of the stacktrace will be: 1684 // - 1 or more fillInStackTrace frames for the exception class (skipped) 1685 // - 0 or more <init> methods for the exception class (skipped) 1686 // - rest of the stack 1687 1688 if (!skip_fillInStackTrace_check) { 1689 if (method->name() == vmSymbols::fillInStackTrace_name() && 1690 throwable->is_a(method->method_holder())) { 1691 continue; 1692 } 1693 else { 1694 skip_fillInStackTrace_check = true; // gone past them all 1695 } 1696 } 1697 if (!skip_throwableInit_check) { 1698 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering"); 1699 1700 // skip <init> methods of the exception class and superclasses 1701 // This is simlar to classic VM. 1702 if (method->name() == vmSymbols::object_initializer_name() && 1703 throwable->is_a(method->method_holder())) { 1704 continue; 1705 } else { 1706 // there are none or we've seen them all - either way stop checking 1707 skip_throwableInit_check = true; 1708 } 1709 } 1710 if (method->is_hidden()) { 1711 if (skip_hidden) continue; 1712 } 1713 bt.push(method, bci, CHECK); 1714 total_count++; 1715 } 1716 1717 // Put completed stack trace into throwable object 1718 set_backtrace(throwable(), bt.backtrace()); 1719 } 1720 1721 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method) { 1722 // No-op if stack trace is disabled 1723 if (!StackTraceInThrowable) { 1724 return; 1725 } 1726 1727 // Disable stack traces for some preallocated out of memory errors 1728 if (!Universe::should_fill_in_stack_trace(throwable)) { 1729 return; 1730 } 1731 1732 PRESERVE_EXCEPTION_MARK; 1733 1734 JavaThread* thread = JavaThread::active(); 1735 fill_in_stack_trace(throwable, method, thread); 1736 // ignore exceptions thrown during stack trace filling 1737 CLEAR_PENDING_EXCEPTION; 1738 } 1739 1740 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 1741 // Allocate stack trace - backtrace is created but not filled in 1742 1743 // No-op if stack trace is disabled 1744 if (!StackTraceInThrowable) return; 1745 BacktraceBuilder bt(CHECK); // creates a backtrace 1746 set_backtrace(throwable(), bt.backtrace()); 1747 } 1748 1749 1750 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 1751 // Fill in stack trace into preallocated backtrace (no GC) 1752 1753 // No-op if stack trace is disabled 1754 if (!StackTraceInThrowable) return; 1755 1756 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check"); 1757 1758 JavaThread* THREAD = JavaThread::current(); 1759 1760 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable())); 1761 assert(backtrace.not_null(), "backtrace should have been preallocated"); 1762 1763 ResourceMark rm(THREAD); 1764 vframeStream st(THREAD); 1765 1766 BacktraceBuilder bt(backtrace); 1767 1768 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 1769 // methods as preallocated errors aren't created by "java" code. 1770 1771 // fill in as much stack trace as possible 1772 typeArrayOop methods = BacktraceBuilder::get_methods(backtrace); 1773 int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth); 1774 int chunk_count = 0; 1775 1776 for (;!st.at_end(); st.next()) { 1777 bt.push(st.method(), st.bci(), CHECK); 1778 chunk_count++; 1779 1780 // Bail-out for deep stacks 1781 if (chunk_count >= max_chunks) break; 1782 } 1783 1784 // We support the Throwable immutability protocol defined for Java 7. 1785 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace()); 1786 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized"); 1787 } 1788 1789 1790 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) { 1791 if (throwable == NULL) { 1792 THROW_0(vmSymbols::java_lang_NullPointerException()); 1793 } 1794 objArrayOop chunk = objArrayOop(backtrace(throwable)); 1795 int depth = 0; 1796 if (chunk != NULL) { 1797 // Iterate over chunks and count full ones 1798 while (true) { 1799 objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset)); 1800 if (next == NULL) break; 1801 depth += trace_chunk_size; 1802 chunk = next; 1803 } 1804 assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check"); 1805 // Count element in remaining partial chunk. NULL value for mirror 1806 // marks the end of the stack trace elements that are saved. 1807 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk); 1808 assert(mirrors != NULL, "sanity check"); 1809 for (int i = 0; i < mirrors->length(); i++) { 1810 if (mirrors->obj_at(i) == NULL) break; 1811 depth++; 1812 } 1813 } 1814 return depth; 1815 } 1816 1817 1818 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) { 1819 if (throwable == NULL) { 1820 THROW_0(vmSymbols::java_lang_NullPointerException()); 1821 } 1822 if (index < 0) { 1823 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 1824 } 1825 // Compute how many chunks to skip and index into actual chunk 1826 objArrayOop chunk = objArrayOop(backtrace(throwable)); 1827 int skip_chunks = index / trace_chunk_size; 1828 int chunk_index = index % trace_chunk_size; 1829 while (chunk != NULL && skip_chunks > 0) { 1830 chunk = objArrayOop(chunk->obj_at(trace_next_offset)); 1831 skip_chunks--; 1832 } 1833 if (chunk == NULL) { 1834 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 1835 } 1836 // Get method id, bci, version, mirror and cpref from chunk 1837 typeArrayOop methods = BacktraceBuilder::get_methods(chunk); 1838 typeArrayOop bcis = BacktraceBuilder::get_bcis(chunk); 1839 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk); 1840 typeArrayOop cprefs = BacktraceBuilder::get_cprefs(chunk); 1841 1842 assert(methods != NULL && bcis != NULL && mirrors != NULL, "sanity check"); 1843 1844 int method = methods->short_at(chunk_index); 1845 int version = BackTrace::version_at(bcis->int_at(chunk_index)); 1846 int bci = BackTrace::bci_at(bcis->int_at(chunk_index)); 1847 int cpref = cprefs->short_at(chunk_index); 1848 Handle mirror(THREAD, mirrors->obj_at(chunk_index)); 1849 1850 // Chunk can be partial full 1851 if (mirror.is_null()) { 1852 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 1853 } 1854 oop element = java_lang_StackTraceElement::create(mirror, method, version, bci, cpref, CHECK_0); 1855 return element; 1856 } 1857 1858 oop java_lang_StackTraceElement::create(Handle mirror, int method_id, 1859 int version, int bci, int cpref, TRAPS) { 1860 // Allocate java.lang.StackTraceElement instance 1861 Klass* k = SystemDictionary::StackTraceElement_klass(); 1862 assert(k != NULL, "must be loaded in 1.4+"); 1863 instanceKlassHandle ik (THREAD, k); 1864 if (ik->should_be_initialized()) { 1865 ik->initialize(CHECK_0); 1866 } 1867 1868 Handle element = ik->allocate_instance_handle(CHECK_0); 1869 java_lang_StackTraceElement::init(element, mirror, method_id, version, bci, cpref, CHECK_0); 1870 return element(); 1871 } 1872 1873 void java_lang_StackTraceElement::init(Handle element, Handle mirror, int method_id, 1874 int version, int bci, int cpref, TRAPS) { 1875 1876 // Fill in class name 1877 ResourceMark rm(THREAD); 1878 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 1879 const char* str = holder->external_name(); 1880 oop classname = StringTable::intern((char*) str, CHECK); 1881 java_lang_StackTraceElement::set_declaringClass(element(), classname); 1882 1883 Method* method = holder->method_with_orig_idnum(method_id, version); 1884 1885 // The method can be NULL if the requested class version is gone 1886 Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref); 1887 1888 // Fill in method name 1889 oop methodname = StringTable::intern(sym, CHECK); 1890 java_lang_StackTraceElement::set_methodName(element(), methodname); 1891 1892 if (!version_matches(method, version)) { 1893 // The method was redefined, accurate line number information isn't available 1894 java_lang_StackTraceElement::set_fileName(element(), NULL); 1895 java_lang_StackTraceElement::set_lineNumber(element(), -1); 1896 } else { 1897 // Fill in source file name and line number. 1898 Symbol* source = BackTrace::get_source_file_name(holder, version); 1899 if (ShowHiddenFrames && source == NULL) 1900 source = vmSymbols::unknown_class_name(); 1901 oop filename = StringTable::intern(source, CHECK); 1902 java_lang_StackTraceElement::set_fileName(element(), filename); 1903 1904 int line_number = BackTrace::get_line_number(method, bci); 1905 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 1906 } 1907 } 1908 1909 oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) { 1910 Handle mirror (THREAD, method->method_holder()->java_mirror()); 1911 int method_id = method->orig_method_idnum(); 1912 int cpref = method->name_index(); 1913 return create(mirror, method_id, method->constants()->version(), bci, cpref, THREAD); 1914 } 1915 1916 int java_lang_StackFrameInfo::bci(oop stackFrame) { 1917 int value = stackFrame->int_field(bci_offset); 1918 if (MemberNameInStackFrame) { 1919 return value; 1920 } else { 1921 return BackTrace::bci_at(value); 1922 } 1923 } 1924 1925 oop java_lang_StackFrameInfo::member_name(oop stackFrame) { 1926 return stackFrame->obj_field(memberName_offset); 1927 } 1928 1929 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) { 1930 if (MemberNameInStackFrame) { 1931 Handle mname(THREAD, stackFrame->obj_field(memberName_offset)); 1932 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname()); 1933 // we should expand MemberName::name when Throwable uses StackTrace 1934 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL); 1935 return method; 1936 } else { 1937 int bci_version = stackFrame->int_field(bci_offset); 1938 int version = BackTrace::version_at(bci_version); 1939 int mid_cpref = stackFrame->int_field(mid_offset); 1940 int mid = BackTrace::mid_at(mid_cpref); 1941 int cpref = BackTrace::cpref_at(mid_cpref); 1942 return holder->method_with_orig_idnum(mid, version); 1943 } 1944 } 1945 1946 Symbol* java_lang_StackFrameInfo::get_file_name(Handle stackFrame, InstanceKlass* holder) { 1947 if (MemberNameInStackFrame) { 1948 return holder->source_file_name(); 1949 } else { 1950 int bci_version = stackFrame->int_field(bci_offset); 1951 int version = BackTrace::version_at(bci_version); 1952 Symbol* source = BackTrace::get_source_file_name(holder, version); 1953 if (source == NULL) { 1954 source = vmSymbols::unknown_class_name(); 1955 } 1956 return source; 1957 } 1958 } 1959 1960 void java_lang_StackFrameInfo::fill_methodInfo(Handle stackFrame, TRAPS) { 1961 ResourceMark rm(THREAD); 1962 oop k = stackFrame->obj_field(declaringClass_offset); 1963 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(k)); 1964 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK); 1965 int bci = java_lang_StackFrameInfo::bci(stackFrame()); 1966 1967 // The method can be NULL if the requested class version is gone 1968 Symbol* sym = (method != NULL) ? method->name() : NULL; 1969 if (MemberNameInStackFrame) { 1970 assert(sym != NULL, "MemberName must have method name"); 1971 } else { 1972 bci = BackTrace::bci_at(bci); // merged with version 1973 // The method can be NULL if the requested class version is gone 1974 if (sym == NULL) { 1975 int mid_cpref = stackFrame->int_field(mid_offset); 1976 int cpref = BackTrace::cpref_at(mid_cpref); 1977 sym = holder->constants()->symbol_at(cpref); 1978 } 1979 } 1980 1981 // set method name 1982 oop methodname = StringTable::intern(sym, CHECK); 1983 java_lang_StackFrameInfo::set_methodName(stackFrame(), methodname); 1984 1985 // set file name and line number 1986 Symbol* source = get_file_name(stackFrame, holder); 1987 if (source != NULL) { 1988 oop filename = StringTable::intern(source, CHECK); 1989 java_lang_StackFrameInfo::set_fileName(stackFrame(), filename); 1990 } 1991 if (method != NULL) { 1992 int line_number = BackTrace::get_line_number(method, bci); 1993 java_lang_StackFrameInfo::set_lineNumber(stackFrame(), line_number); 1994 } 1995 } 1996 1997 void java_lang_StackFrameInfo::compute_offsets() { 1998 Klass* k = SystemDictionary::StackFrameInfo_klass(); 1999 compute_offset(declaringClass_offset, k, vmSymbols::declaringClass_name(), vmSymbols::class_signature()); 2000 compute_offset(memberName_offset, k, vmSymbols::memberName_name(), vmSymbols::object_signature()); 2001 compute_offset(mid_offset, k, vmSymbols::mid_name(), vmSymbols::int_signature()); 2002 compute_offset(bci_offset, k, vmSymbols::bci_name(), vmSymbols::int_signature()); 2003 compute_offset(methodName_offset, k, vmSymbols::methodName_name(), vmSymbols::string_signature()); 2004 compute_offset(fileName_offset, k, vmSymbols::fileName_name(), vmSymbols::string_signature()); 2005 compute_offset(lineNumber_offset, k, vmSymbols::lineNumber_name(), vmSymbols::int_signature()); 2006 } 2007 2008 void java_lang_LiveStackFrameInfo::compute_offsets() { 2009 Klass* k = SystemDictionary::LiveStackFrameInfo_klass(); 2010 compute_offset(monitors_offset, k, vmSymbols::monitors_name(), vmSymbols::object_array_signature()); 2011 compute_offset(locals_offset, k, vmSymbols::locals_name(), vmSymbols::object_array_signature()); 2012 compute_offset(operands_offset, k, vmSymbols::operands_name(), vmSymbols::object_array_signature()); 2013 } 2014 2015 void java_lang_reflect_AccessibleObject::compute_offsets() { 2016 Klass* k = SystemDictionary::reflect_AccessibleObject_klass(); 2017 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature()); 2018 } 2019 2020 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 2021 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2022 return (jboolean) reflect->bool_field(override_offset); 2023 } 2024 2025 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 2026 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2027 reflect->bool_field_put(override_offset, (int) value); 2028 } 2029 2030 void java_lang_reflect_Method::compute_offsets() { 2031 Klass* k = SystemDictionary::reflect_Method_klass(); 2032 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2033 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2034 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature()); 2035 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 2036 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 2037 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 2038 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2039 // The generic signature and annotations fields are only present in 1.5 2040 signature_offset = -1; 2041 annotations_offset = -1; 2042 parameter_annotations_offset = -1; 2043 annotation_default_offset = -1; 2044 type_annotations_offset = -1; 2045 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 2046 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 2047 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 2048 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature()); 2049 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 2050 } 2051 2052 Handle java_lang_reflect_Method::create(TRAPS) { 2053 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2054 Klass* klass = SystemDictionary::reflect_Method_klass(); 2055 // This class is eagerly initialized during VM initialization, since we keep a refence 2056 // to one of the methods 2057 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized"); 2058 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD); 2059 } 2060 2061 oop java_lang_reflect_Method::clazz(oop reflect) { 2062 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2063 return reflect->obj_field(clazz_offset); 2064 } 2065 2066 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 2067 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2068 reflect->obj_field_put(clazz_offset, value); 2069 } 2070 2071 int java_lang_reflect_Method::slot(oop reflect) { 2072 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2073 return reflect->int_field(slot_offset); 2074 } 2075 2076 void java_lang_reflect_Method::set_slot(oop reflect, int value) { 2077 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2078 reflect->int_field_put(slot_offset, value); 2079 } 2080 2081 oop java_lang_reflect_Method::name(oop method) { 2082 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2083 return method->obj_field(name_offset); 2084 } 2085 2086 void java_lang_reflect_Method::set_name(oop method, oop value) { 2087 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2088 method->obj_field_put(name_offset, value); 2089 } 2090 2091 oop java_lang_reflect_Method::return_type(oop method) { 2092 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2093 return method->obj_field(returnType_offset); 2094 } 2095 2096 void java_lang_reflect_Method::set_return_type(oop method, oop value) { 2097 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2098 method->obj_field_put(returnType_offset, value); 2099 } 2100 2101 oop java_lang_reflect_Method::parameter_types(oop method) { 2102 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2103 return method->obj_field(parameterTypes_offset); 2104 } 2105 2106 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 2107 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2108 method->obj_field_put(parameterTypes_offset, value); 2109 } 2110 2111 oop java_lang_reflect_Method::exception_types(oop method) { 2112 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2113 return method->obj_field(exceptionTypes_offset); 2114 } 2115 2116 void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 2117 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2118 method->obj_field_put(exceptionTypes_offset, value); 2119 } 2120 2121 int java_lang_reflect_Method::modifiers(oop method) { 2122 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2123 return method->int_field(modifiers_offset); 2124 } 2125 2126 void java_lang_reflect_Method::set_modifiers(oop method, int value) { 2127 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2128 method->int_field_put(modifiers_offset, value); 2129 } 2130 2131 bool java_lang_reflect_Method::has_signature_field() { 2132 return (signature_offset >= 0); 2133 } 2134 2135 oop java_lang_reflect_Method::signature(oop method) { 2136 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2137 assert(has_signature_field(), "signature field must be present"); 2138 return method->obj_field(signature_offset); 2139 } 2140 2141 void java_lang_reflect_Method::set_signature(oop method, oop value) { 2142 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2143 assert(has_signature_field(), "signature field must be present"); 2144 method->obj_field_put(signature_offset, value); 2145 } 2146 2147 bool java_lang_reflect_Method::has_annotations_field() { 2148 return (annotations_offset >= 0); 2149 } 2150 2151 oop java_lang_reflect_Method::annotations(oop method) { 2152 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2153 assert(has_annotations_field(), "annotations field must be present"); 2154 return method->obj_field(annotations_offset); 2155 } 2156 2157 void java_lang_reflect_Method::set_annotations(oop method, oop value) { 2158 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2159 assert(has_annotations_field(), "annotations field must be present"); 2160 method->obj_field_put(annotations_offset, value); 2161 } 2162 2163 bool java_lang_reflect_Method::has_parameter_annotations_field() { 2164 return (parameter_annotations_offset >= 0); 2165 } 2166 2167 oop java_lang_reflect_Method::parameter_annotations(oop method) { 2168 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2169 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2170 return method->obj_field(parameter_annotations_offset); 2171 } 2172 2173 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 2174 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2175 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2176 method->obj_field_put(parameter_annotations_offset, value); 2177 } 2178 2179 bool java_lang_reflect_Method::has_annotation_default_field() { 2180 return (annotation_default_offset >= 0); 2181 } 2182 2183 oop java_lang_reflect_Method::annotation_default(oop method) { 2184 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2185 assert(has_annotation_default_field(), "annotation default field must be present"); 2186 return method->obj_field(annotation_default_offset); 2187 } 2188 2189 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 2190 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2191 assert(has_annotation_default_field(), "annotation default field must be present"); 2192 method->obj_field_put(annotation_default_offset, value); 2193 } 2194 2195 bool java_lang_reflect_Method::has_type_annotations_field() { 2196 return (type_annotations_offset >= 0); 2197 } 2198 2199 oop java_lang_reflect_Method::type_annotations(oop method) { 2200 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2201 assert(has_type_annotations_field(), "type_annotations field must be present"); 2202 return method->obj_field(type_annotations_offset); 2203 } 2204 2205 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) { 2206 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2207 assert(has_type_annotations_field(), "type_annotations field must be present"); 2208 method->obj_field_put(type_annotations_offset, value); 2209 } 2210 2211 void java_lang_reflect_Constructor::compute_offsets() { 2212 Klass* k = SystemDictionary::reflect_Constructor_klass(); 2213 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2214 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 2215 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 2216 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 2217 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2218 // The generic signature and annotations fields are only present in 1.5 2219 signature_offset = -1; 2220 annotations_offset = -1; 2221 parameter_annotations_offset = -1; 2222 type_annotations_offset = -1; 2223 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 2224 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 2225 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 2226 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 2227 } 2228 2229 Handle java_lang_reflect_Constructor::create(TRAPS) { 2230 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2231 Symbol* name = vmSymbols::java_lang_reflect_Constructor(); 2232 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2233 instanceKlassHandle klass (THREAD, k); 2234 // Ensure it is initialized 2235 klass->initialize(CHECK_NH); 2236 return klass->allocate_instance_handle(THREAD); 2237 } 2238 2239 oop java_lang_reflect_Constructor::clazz(oop reflect) { 2240 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2241 return reflect->obj_field(clazz_offset); 2242 } 2243 2244 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 2245 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2246 reflect->obj_field_put(clazz_offset, value); 2247 } 2248 2249 oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 2250 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2251 return constructor->obj_field(parameterTypes_offset); 2252 } 2253 2254 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 2255 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2256 constructor->obj_field_put(parameterTypes_offset, value); 2257 } 2258 2259 oop java_lang_reflect_Constructor::exception_types(oop constructor) { 2260 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2261 return constructor->obj_field(exceptionTypes_offset); 2262 } 2263 2264 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 2265 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2266 constructor->obj_field_put(exceptionTypes_offset, value); 2267 } 2268 2269 int java_lang_reflect_Constructor::slot(oop reflect) { 2270 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2271 return reflect->int_field(slot_offset); 2272 } 2273 2274 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 2275 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2276 reflect->int_field_put(slot_offset, value); 2277 } 2278 2279 int java_lang_reflect_Constructor::modifiers(oop constructor) { 2280 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2281 return constructor->int_field(modifiers_offset); 2282 } 2283 2284 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 2285 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2286 constructor->int_field_put(modifiers_offset, value); 2287 } 2288 2289 bool java_lang_reflect_Constructor::has_signature_field() { 2290 return (signature_offset >= 0); 2291 } 2292 2293 oop java_lang_reflect_Constructor::signature(oop constructor) { 2294 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2295 assert(has_signature_field(), "signature field must be present"); 2296 return constructor->obj_field(signature_offset); 2297 } 2298 2299 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 2300 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2301 assert(has_signature_field(), "signature field must be present"); 2302 constructor->obj_field_put(signature_offset, value); 2303 } 2304 2305 bool java_lang_reflect_Constructor::has_annotations_field() { 2306 return (annotations_offset >= 0); 2307 } 2308 2309 oop java_lang_reflect_Constructor::annotations(oop constructor) { 2310 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2311 assert(has_annotations_field(), "annotations field must be present"); 2312 return constructor->obj_field(annotations_offset); 2313 } 2314 2315 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 2316 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2317 assert(has_annotations_field(), "annotations field must be present"); 2318 constructor->obj_field_put(annotations_offset, value); 2319 } 2320 2321 bool java_lang_reflect_Constructor::has_parameter_annotations_field() { 2322 return (parameter_annotations_offset >= 0); 2323 } 2324 2325 oop java_lang_reflect_Constructor::parameter_annotations(oop method) { 2326 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2327 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2328 return method->obj_field(parameter_annotations_offset); 2329 } 2330 2331 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 2332 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2333 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2334 method->obj_field_put(parameter_annotations_offset, value); 2335 } 2336 2337 bool java_lang_reflect_Constructor::has_type_annotations_field() { 2338 return (type_annotations_offset >= 0); 2339 } 2340 2341 oop java_lang_reflect_Constructor::type_annotations(oop constructor) { 2342 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2343 assert(has_type_annotations_field(), "type_annotations field must be present"); 2344 return constructor->obj_field(type_annotations_offset); 2345 } 2346 2347 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) { 2348 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2349 assert(has_type_annotations_field(), "type_annotations field must be present"); 2350 constructor->obj_field_put(type_annotations_offset, value); 2351 } 2352 2353 void java_lang_reflect_Field::compute_offsets() { 2354 Klass* k = SystemDictionary::reflect_Field_klass(); 2355 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2356 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2357 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature()); 2358 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 2359 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2360 // The generic signature and annotations fields are only present in 1.5 2361 signature_offset = -1; 2362 annotations_offset = -1; 2363 type_annotations_offset = -1; 2364 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 2365 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 2366 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 2367 } 2368 2369 Handle java_lang_reflect_Field::create(TRAPS) { 2370 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2371 Symbol* name = vmSymbols::java_lang_reflect_Field(); 2372 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2373 instanceKlassHandle klass (THREAD, k); 2374 // Ensure it is initialized 2375 klass->initialize(CHECK_NH); 2376 return klass->allocate_instance_handle(THREAD); 2377 } 2378 2379 oop java_lang_reflect_Field::clazz(oop reflect) { 2380 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2381 return reflect->obj_field(clazz_offset); 2382 } 2383 2384 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 2385 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2386 reflect->obj_field_put(clazz_offset, value); 2387 } 2388 2389 oop java_lang_reflect_Field::name(oop field) { 2390 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2391 return field->obj_field(name_offset); 2392 } 2393 2394 void java_lang_reflect_Field::set_name(oop field, oop value) { 2395 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2396 field->obj_field_put(name_offset, value); 2397 } 2398 2399 oop java_lang_reflect_Field::type(oop field) { 2400 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2401 return field->obj_field(type_offset); 2402 } 2403 2404 void java_lang_reflect_Field::set_type(oop field, oop value) { 2405 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2406 field->obj_field_put(type_offset, value); 2407 } 2408 2409 int java_lang_reflect_Field::slot(oop reflect) { 2410 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2411 return reflect->int_field(slot_offset); 2412 } 2413 2414 void java_lang_reflect_Field::set_slot(oop reflect, int value) { 2415 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2416 reflect->int_field_put(slot_offset, value); 2417 } 2418 2419 int java_lang_reflect_Field::modifiers(oop field) { 2420 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2421 return field->int_field(modifiers_offset); 2422 } 2423 2424 void java_lang_reflect_Field::set_modifiers(oop field, int value) { 2425 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2426 field->int_field_put(modifiers_offset, value); 2427 } 2428 2429 bool java_lang_reflect_Field::has_signature_field() { 2430 return (signature_offset >= 0); 2431 } 2432 2433 oop java_lang_reflect_Field::signature(oop field) { 2434 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2435 assert(has_signature_field(), "signature field must be present"); 2436 return field->obj_field(signature_offset); 2437 } 2438 2439 void java_lang_reflect_Field::set_signature(oop field, oop value) { 2440 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2441 assert(has_signature_field(), "signature field must be present"); 2442 field->obj_field_put(signature_offset, value); 2443 } 2444 2445 bool java_lang_reflect_Field::has_annotations_field() { 2446 return (annotations_offset >= 0); 2447 } 2448 2449 oop java_lang_reflect_Field::annotations(oop field) { 2450 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2451 assert(has_annotations_field(), "annotations field must be present"); 2452 return field->obj_field(annotations_offset); 2453 } 2454 2455 void java_lang_reflect_Field::set_annotations(oop field, oop value) { 2456 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2457 assert(has_annotations_field(), "annotations field must be present"); 2458 field->obj_field_put(annotations_offset, value); 2459 } 2460 2461 bool java_lang_reflect_Field::has_type_annotations_field() { 2462 return (type_annotations_offset >= 0); 2463 } 2464 2465 oop java_lang_reflect_Field::type_annotations(oop field) { 2466 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2467 assert(has_type_annotations_field(), "type_annotations field must be present"); 2468 return field->obj_field(type_annotations_offset); 2469 } 2470 2471 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) { 2472 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2473 assert(has_type_annotations_field(), "type_annotations field must be present"); 2474 field->obj_field_put(type_annotations_offset, value); 2475 } 2476 2477 void sun_reflect_ConstantPool::compute_offsets() { 2478 Klass* k = SystemDictionary::reflect_ConstantPool_klass(); 2479 // This null test can be removed post beta 2480 if (k != NULL) { 2481 // The field is called ConstantPool* in the sun.reflect.ConstantPool class. 2482 compute_offset(_oop_offset, k, vmSymbols::ConstantPool_name(), vmSymbols::object_signature()); 2483 } 2484 } 2485 2486 void java_lang_reflect_Parameter::compute_offsets() { 2487 Klass* k = SystemDictionary::reflect_Parameter_klass(); 2488 if(NULL != k) { 2489 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2490 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2491 compute_offset(index_offset, k, vmSymbols::index_name(), vmSymbols::int_signature()); 2492 compute_offset(executable_offset, k, vmSymbols::executable_name(), vmSymbols::executable_signature()); 2493 } 2494 } 2495 2496 Handle java_lang_reflect_Parameter::create(TRAPS) { 2497 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2498 Symbol* name = vmSymbols::java_lang_reflect_Parameter(); 2499 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2500 instanceKlassHandle klass (THREAD, k); 2501 // Ensure it is initialized 2502 klass->initialize(CHECK_NH); 2503 return klass->allocate_instance_handle(THREAD); 2504 } 2505 2506 oop java_lang_reflect_Parameter::name(oop param) { 2507 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2508 return param->obj_field(name_offset); 2509 } 2510 2511 void java_lang_reflect_Parameter::set_name(oop param, oop value) { 2512 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2513 param->obj_field_put(name_offset, value); 2514 } 2515 2516 int java_lang_reflect_Parameter::modifiers(oop param) { 2517 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2518 return param->int_field(modifiers_offset); 2519 } 2520 2521 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) { 2522 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2523 param->int_field_put(modifiers_offset, value); 2524 } 2525 2526 int java_lang_reflect_Parameter::index(oop param) { 2527 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2528 return param->int_field(index_offset); 2529 } 2530 2531 void java_lang_reflect_Parameter::set_index(oop param, int value) { 2532 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2533 param->int_field_put(index_offset, value); 2534 } 2535 2536 oop java_lang_reflect_Parameter::executable(oop param) { 2537 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2538 return param->obj_field(executable_offset); 2539 } 2540 2541 void java_lang_reflect_Parameter::set_executable(oop param, oop value) { 2542 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2543 param->obj_field_put(executable_offset, value); 2544 } 2545 2546 2547 Handle sun_reflect_ConstantPool::create(TRAPS) { 2548 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2549 Klass* k = SystemDictionary::reflect_ConstantPool_klass(); 2550 instanceKlassHandle klass (THREAD, k); 2551 // Ensure it is initialized 2552 klass->initialize(CHECK_NH); 2553 return klass->allocate_instance_handle(THREAD); 2554 } 2555 2556 2557 void sun_reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) { 2558 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2559 oop mirror = value->pool_holder()->java_mirror(); 2560 // Save the mirror to get back the constant pool. 2561 reflect->obj_field_put(_oop_offset, mirror); 2562 } 2563 2564 ConstantPool* sun_reflect_ConstantPool::get_cp(oop reflect) { 2565 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2566 2567 oop mirror = reflect->obj_field(_oop_offset); 2568 Klass* k = java_lang_Class::as_Klass(mirror); 2569 assert(k->oop_is_instance(), "Must be"); 2570 2571 // Get the constant pool back from the klass. Since class redefinition 2572 // merges the new constant pool into the old, this is essentially the 2573 // same constant pool as the original. If constant pool merging is 2574 // no longer done in the future, this will have to change to save 2575 // the original. 2576 return InstanceKlass::cast(k)->constants(); 2577 } 2578 2579 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() { 2580 Klass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass(); 2581 // This null test can be removed post beta 2582 if (k != NULL) { 2583 compute_offset(_base_offset, k, 2584 vmSymbols::base_name(), vmSymbols::object_signature()); 2585 } 2586 } 2587 2588 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 2589 Klass* k = SystemDictionary::box_klass(type); 2590 if (k == NULL) return NULL; 2591 instanceKlassHandle h (THREAD, k); 2592 if (!h->is_initialized()) h->initialize(CHECK_0); 2593 return h->allocate_instance(THREAD); 2594 } 2595 2596 2597 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 2598 oop box = initialize_and_allocate(type, CHECK_0); 2599 if (box == NULL) return NULL; 2600 switch (type) { 2601 case T_BOOLEAN: 2602 box->bool_field_put(value_offset, value->z); 2603 break; 2604 case T_CHAR: 2605 box->char_field_put(value_offset, value->c); 2606 break; 2607 case T_FLOAT: 2608 box->float_field_put(value_offset, value->f); 2609 break; 2610 case T_DOUBLE: 2611 box->double_field_put(long_value_offset, value->d); 2612 break; 2613 case T_BYTE: 2614 box->byte_field_put(value_offset, value->b); 2615 break; 2616 case T_SHORT: 2617 box->short_field_put(value_offset, value->s); 2618 break; 2619 case T_INT: 2620 box->int_field_put(value_offset, value->i); 2621 break; 2622 case T_LONG: 2623 box->long_field_put(long_value_offset, value->j); 2624 break; 2625 default: 2626 return NULL; 2627 } 2628 return box; 2629 } 2630 2631 2632 BasicType java_lang_boxing_object::basic_type(oop box) { 2633 if (box == NULL) return T_ILLEGAL; 2634 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2635 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 2636 return T_ILLEGAL; 2637 return type; 2638 } 2639 2640 2641 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 2642 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2643 switch (type) { 2644 case T_BOOLEAN: 2645 value->z = box->bool_field(value_offset); 2646 break; 2647 case T_CHAR: 2648 value->c = box->char_field(value_offset); 2649 break; 2650 case T_FLOAT: 2651 value->f = box->float_field(value_offset); 2652 break; 2653 case T_DOUBLE: 2654 value->d = box->double_field(long_value_offset); 2655 break; 2656 case T_BYTE: 2657 value->b = box->byte_field(value_offset); 2658 break; 2659 case T_SHORT: 2660 value->s = box->short_field(value_offset); 2661 break; 2662 case T_INT: 2663 value->i = box->int_field(value_offset); 2664 break; 2665 case T_LONG: 2666 value->j = box->long_field(long_value_offset); 2667 break; 2668 default: 2669 return T_ILLEGAL; 2670 } // end switch 2671 return type; 2672 } 2673 2674 2675 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 2676 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2677 switch (type) { 2678 case T_BOOLEAN: 2679 box->bool_field_put(value_offset, value->z); 2680 break; 2681 case T_CHAR: 2682 box->char_field_put(value_offset, value->c); 2683 break; 2684 case T_FLOAT: 2685 box->float_field_put(value_offset, value->f); 2686 break; 2687 case T_DOUBLE: 2688 box->double_field_put(long_value_offset, value->d); 2689 break; 2690 case T_BYTE: 2691 box->byte_field_put(value_offset, value->b); 2692 break; 2693 case T_SHORT: 2694 box->short_field_put(value_offset, value->s); 2695 break; 2696 case T_INT: 2697 box->int_field_put(value_offset, value->i); 2698 break; 2699 case T_LONG: 2700 box->long_field_put(long_value_offset, value->j); 2701 break; 2702 default: 2703 return T_ILLEGAL; 2704 } // end switch 2705 return type; 2706 } 2707 2708 2709 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) { 2710 switch (type) { 2711 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break; 2712 case T_CHAR: st->print("%d", value->c); break; 2713 case T_BYTE: st->print("%d", value->b); break; 2714 case T_SHORT: st->print("%d", value->s); break; 2715 case T_INT: st->print("%d", value->i); break; 2716 case T_LONG: st->print(INT64_FORMAT, value->j); break; 2717 case T_FLOAT: st->print("%f", value->f); break; 2718 case T_DOUBLE: st->print("%lf", value->d); break; 2719 default: st->print("type %d?", type); break; 2720 } 2721 } 2722 2723 2724 // Support for java_lang_ref_Reference 2725 HeapWord *java_lang_ref_Reference::pending_list_lock_addr() { 2726 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass()); 2727 address addr = ik->static_field_addr(static_lock_offset); 2728 return (HeapWord*) addr; 2729 } 2730 2731 oop java_lang_ref_Reference::pending_list_lock() { 2732 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass()); 2733 address addr = ik->static_field_addr(static_lock_offset); 2734 if (UseCompressedOops) { 2735 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 2736 } else { 2737 return oopDesc::load_decode_heap_oop((oop*)addr); 2738 } 2739 } 2740 2741 HeapWord *java_lang_ref_Reference::pending_list_addr() { 2742 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass()); 2743 address addr = ik->static_field_addr(static_pending_offset); 2744 // XXX This might not be HeapWord aligned, almost rather be char *. 2745 return (HeapWord*)addr; 2746 } 2747 2748 oop java_lang_ref_Reference::pending_list() { 2749 char *addr = (char *)pending_list_addr(); 2750 if (UseCompressedOops) { 2751 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 2752 } else { 2753 return oopDesc::load_decode_heap_oop((oop*)addr); 2754 } 2755 } 2756 2757 2758 // Support for java_lang_ref_SoftReference 2759 2760 jlong java_lang_ref_SoftReference::timestamp(oop ref) { 2761 return ref->long_field(timestamp_offset); 2762 } 2763 2764 jlong java_lang_ref_SoftReference::clock() { 2765 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass()); 2766 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset); 2767 return *offset; 2768 } 2769 2770 void java_lang_ref_SoftReference::set_clock(jlong value) { 2771 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass()); 2772 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset); 2773 *offset = value; 2774 } 2775 2776 // Support for java_lang_invoke_DirectMethodHandle 2777 2778 int java_lang_invoke_DirectMethodHandle::_member_offset; 2779 2780 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) { 2781 oop member_name = NULL; 2782 bool is_dmh = dmh->is_oop() && java_lang_invoke_DirectMethodHandle::is_instance(dmh); 2783 assert(is_dmh, "a DirectMethodHandle oop is expected"); 2784 if (is_dmh) { 2785 member_name = dmh->obj_field(member_offset_in_bytes()); 2786 } 2787 return member_name; 2788 } 2789 2790 void java_lang_invoke_DirectMethodHandle::compute_offsets() { 2791 Klass* klass_oop = SystemDictionary::DirectMethodHandle_klass(); 2792 if (klass_oop != NULL) { 2793 compute_offset(_member_offset, klass_oop, vmSymbols::member_name(), vmSymbols::java_lang_invoke_MemberName_signature()); 2794 } 2795 } 2796 2797 // Support for java_lang_invoke_MethodHandle 2798 2799 int java_lang_invoke_MethodHandle::_type_offset; 2800 int java_lang_invoke_MethodHandle::_form_offset; 2801 2802 int java_lang_invoke_MemberName::_clazz_offset; 2803 int java_lang_invoke_MemberName::_name_offset; 2804 int java_lang_invoke_MemberName::_type_offset; 2805 int java_lang_invoke_MemberName::_flags_offset; 2806 int java_lang_invoke_MemberName::_vmtarget_offset; 2807 int java_lang_invoke_MemberName::_vmloader_offset; 2808 int java_lang_invoke_MemberName::_vmindex_offset; 2809 2810 int java_lang_invoke_LambdaForm::_vmentry_offset; 2811 2812 void java_lang_invoke_MethodHandle::compute_offsets() { 2813 Klass* klass_oop = SystemDictionary::MethodHandle_klass(); 2814 if (klass_oop != NULL) { 2815 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature()); 2816 compute_offset(_form_offset, klass_oop, vmSymbols::form_name(), vmSymbols::java_lang_invoke_LambdaForm_signature()); 2817 } 2818 } 2819 2820 void java_lang_invoke_MemberName::compute_offsets() { 2821 Klass* klass_oop = SystemDictionary::MemberName_klass(); 2822 if (klass_oop != NULL) { 2823 compute_offset(_clazz_offset, klass_oop, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2824 compute_offset(_name_offset, klass_oop, vmSymbols::name_name(), vmSymbols::string_signature()); 2825 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::object_signature()); 2826 compute_offset(_flags_offset, klass_oop, vmSymbols::flags_name(), vmSymbols::int_signature()); 2827 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 2828 } 2829 } 2830 2831 void java_lang_invoke_LambdaForm::compute_offsets() { 2832 Klass* klass_oop = SystemDictionary::LambdaForm_klass(); 2833 if (klass_oop != NULL) { 2834 compute_offset(_vmentry_offset, klass_oop, vmSymbols::vmentry_name(), vmSymbols::java_lang_invoke_MemberName_signature()); 2835 } 2836 } 2837 2838 bool java_lang_invoke_LambdaForm::is_instance(oop obj) { 2839 return obj != NULL && is_subclass(obj->klass()); 2840 } 2841 2842 2843 oop java_lang_invoke_MethodHandle::type(oop mh) { 2844 return mh->obj_field(_type_offset); 2845 } 2846 2847 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) { 2848 mh->obj_field_put(_type_offset, mtype); 2849 } 2850 2851 oop java_lang_invoke_MethodHandle::form(oop mh) { 2852 assert(_form_offset != 0, ""); 2853 return mh->obj_field(_form_offset); 2854 } 2855 2856 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) { 2857 assert(_form_offset != 0, ""); 2858 mh->obj_field_put(_form_offset, lform); 2859 } 2860 2861 /// MemberName accessors 2862 2863 oop java_lang_invoke_MemberName::clazz(oop mname) { 2864 assert(is_instance(mname), "wrong type"); 2865 return mname->obj_field(_clazz_offset); 2866 } 2867 2868 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) { 2869 assert(is_instance(mname), "wrong type"); 2870 mname->obj_field_put(_clazz_offset, clazz); 2871 } 2872 2873 oop java_lang_invoke_MemberName::name(oop mname) { 2874 assert(is_instance(mname), "wrong type"); 2875 return mname->obj_field(_name_offset); 2876 } 2877 2878 void java_lang_invoke_MemberName::set_name(oop mname, oop name) { 2879 assert(is_instance(mname), "wrong type"); 2880 mname->obj_field_put(_name_offset, name); 2881 } 2882 2883 oop java_lang_invoke_MemberName::type(oop mname) { 2884 assert(is_instance(mname), "wrong type"); 2885 return mname->obj_field(_type_offset); 2886 } 2887 2888 void java_lang_invoke_MemberName::set_type(oop mname, oop type) { 2889 assert(is_instance(mname), "wrong type"); 2890 mname->obj_field_put(_type_offset, type); 2891 } 2892 2893 int java_lang_invoke_MemberName::flags(oop mname) { 2894 assert(is_instance(mname), "wrong type"); 2895 return mname->int_field(_flags_offset); 2896 } 2897 2898 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) { 2899 assert(is_instance(mname), "wrong type"); 2900 mname->int_field_put(_flags_offset, flags); 2901 } 2902 2903 Metadata* java_lang_invoke_MemberName::vmtarget(oop mname) { 2904 assert(is_instance(mname), "wrong type"); 2905 return (Metadata*)mname->address_field(_vmtarget_offset); 2906 } 2907 2908 bool java_lang_invoke_MemberName::is_method(oop mname) { 2909 assert(is_instance(mname), "must be MemberName"); 2910 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0; 2911 } 2912 2913 void java_lang_invoke_MemberName::set_vmtarget(oop mname, Metadata* ref) { 2914 assert(is_instance(mname), "wrong type"); 2915 // check the type of the vmtarget 2916 oop dependency = NULL; 2917 if (ref != NULL) { 2918 switch (flags(mname) & (MN_IS_METHOD | 2919 MN_IS_CONSTRUCTOR | 2920 MN_IS_FIELD)) { 2921 case MN_IS_METHOD: 2922 case MN_IS_CONSTRUCTOR: 2923 assert(ref->is_method(), "should be a method"); 2924 dependency = ((Method*)ref)->method_holder()->java_mirror(); 2925 break; 2926 case MN_IS_FIELD: 2927 assert(ref->is_klass(), "should be a class"); 2928 dependency = ((Klass*)ref)->java_mirror(); 2929 break; 2930 default: 2931 ShouldNotReachHere(); 2932 } 2933 } 2934 mname->address_field_put(_vmtarget_offset, (address)ref); 2935 // Add a reference to the loader (actually mirror because anonymous classes will not have 2936 // distinct loaders) to ensure the metadata is kept alive 2937 // This mirror may be different than the one in clazz field. 2938 mname->obj_field_put(_vmloader_offset, dependency); 2939 } 2940 2941 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) { 2942 assert(is_instance(mname), "wrong type"); 2943 return (intptr_t) mname->address_field(_vmindex_offset); 2944 } 2945 2946 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) { 2947 assert(is_instance(mname), "wrong type"); 2948 mname->address_field_put(_vmindex_offset, (address) index); 2949 } 2950 2951 oop java_lang_invoke_LambdaForm::vmentry(oop lform) { 2952 assert(is_instance(lform), "wrong type"); 2953 return lform->obj_field(_vmentry_offset); 2954 } 2955 2956 2957 // Support for java_lang_invoke_MethodType 2958 2959 int java_lang_invoke_MethodType::_rtype_offset; 2960 int java_lang_invoke_MethodType::_ptypes_offset; 2961 2962 void java_lang_invoke_MethodType::compute_offsets() { 2963 Klass* k = SystemDictionary::MethodType_klass(); 2964 if (k != NULL) { 2965 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature()); 2966 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature()); 2967 } 2968 } 2969 2970 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) { 2971 st->print("("); 2972 objArrayOop pts = ptypes(mt); 2973 for (int i = 0, limit = pts->length(); i < limit; i++) { 2974 java_lang_Class::print_signature(pts->obj_at(i), st); 2975 } 2976 st->print(")"); 2977 java_lang_Class::print_signature(rtype(mt), st); 2978 } 2979 2980 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) { 2981 ResourceMark rm; 2982 stringStream buffer(128); 2983 print_signature(mt, &buffer); 2984 const char* sigstr = buffer.base(); 2985 int siglen = (int) buffer.size(); 2986 Symbol *name; 2987 if (!intern_if_not_found) { 2988 name = SymbolTable::probe(sigstr, siglen); 2989 } else { 2990 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 2991 } 2992 return name; 2993 } 2994 2995 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) { 2996 if (mt1 == mt2) 2997 return true; 2998 if (rtype(mt1) != rtype(mt2)) 2999 return false; 3000 if (ptype_count(mt1) != ptype_count(mt2)) 3001 return false; 3002 for (int i = ptype_count(mt1) - 1; i >= 0; i--) { 3003 if (ptype(mt1, i) != ptype(mt2, i)) 3004 return false; 3005 } 3006 return true; 3007 } 3008 3009 oop java_lang_invoke_MethodType::rtype(oop mt) { 3010 assert(is_instance(mt), "must be a MethodType"); 3011 return mt->obj_field(_rtype_offset); 3012 } 3013 3014 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) { 3015 assert(is_instance(mt), "must be a MethodType"); 3016 return (objArrayOop) mt->obj_field(_ptypes_offset); 3017 } 3018 3019 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) { 3020 return ptypes(mt)->obj_at(idx); 3021 } 3022 3023 int java_lang_invoke_MethodType::ptype_count(oop mt) { 3024 return ptypes(mt)->length(); 3025 } 3026 3027 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) { 3028 objArrayOop pts = ptypes(mt); 3029 int count = pts->length(); 3030 int slots = 0; 3031 for (int i = 0; i < count; i++) { 3032 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i)); 3033 slots += type2size[bt]; 3034 } 3035 return slots; 3036 } 3037 3038 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) { 3039 BasicType bt = java_lang_Class::as_BasicType(rtype(mt)); 3040 return type2size[bt]; 3041 } 3042 3043 3044 // Support for java_lang_invoke_CallSite 3045 3046 int java_lang_invoke_CallSite::_target_offset; 3047 int java_lang_invoke_CallSite::_context_offset; 3048 3049 void java_lang_invoke_CallSite::compute_offsets() { 3050 Klass* k = SystemDictionary::CallSite_klass(); 3051 if (k != NULL) { 3052 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature()); 3053 compute_offset(_context_offset, k, vmSymbols::context_name(), 3054 vmSymbols::java_lang_invoke_MethodHandleNatives_CallSiteContext_signature()); 3055 } 3056 } 3057 3058 oop java_lang_invoke_CallSite::context(oop call_site) { 3059 assert(java_lang_invoke_CallSite::is_instance(call_site), ""); 3060 3061 oop dep_oop = call_site->obj_field(_context_offset); 3062 return dep_oop; 3063 } 3064 3065 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext 3066 3067 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset; 3068 3069 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() { 3070 Klass* k = SystemDictionary::Context_klass(); 3071 if (k != NULL) { 3072 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3073 } 3074 } 3075 3076 nmethodBucket* java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) { 3077 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), ""); 3078 return (nmethodBucket*) (address) call_site->long_field(_vmdependencies_offset); 3079 } 3080 3081 void java_lang_invoke_MethodHandleNatives_CallSiteContext::set_vmdependencies(oop call_site, nmethodBucket* context) { 3082 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), ""); 3083 call_site->long_field_put(_vmdependencies_offset, (jlong) (address) context); 3084 } 3085 3086 // Support for java_security_AccessControlContext 3087 3088 int java_security_AccessControlContext::_context_offset = 0; 3089 int java_security_AccessControlContext::_privilegedContext_offset = 0; 3090 int java_security_AccessControlContext::_isPrivileged_offset = 0; 3091 int java_security_AccessControlContext::_isAuthorized_offset = -1; 3092 3093 void java_security_AccessControlContext::compute_offsets() { 3094 assert(_isPrivileged_offset == 0, "offsets should be initialized only once"); 3095 fieldDescriptor fd; 3096 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass()); 3097 3098 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) { 3099 fatal("Invalid layout of java.security.AccessControlContext"); 3100 } 3101 _context_offset = fd.offset(); 3102 3103 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) { 3104 fatal("Invalid layout of java.security.AccessControlContext"); 3105 } 3106 _privilegedContext_offset = fd.offset(); 3107 3108 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) { 3109 fatal("Invalid layout of java.security.AccessControlContext"); 3110 } 3111 _isPrivileged_offset = fd.offset(); 3112 3113 // The offset may not be present for bootstrapping with older JDK. 3114 if (ik->find_local_field(vmSymbols::isAuthorized_name(), vmSymbols::bool_signature(), &fd)) { 3115 _isAuthorized_offset = fd.offset(); 3116 } 3117 } 3118 3119 3120 bool java_security_AccessControlContext::is_authorized(Handle context) { 3121 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type"); 3122 assert(_isAuthorized_offset != -1, "should be set"); 3123 return context->bool_field(_isAuthorized_offset) != 0; 3124 } 3125 3126 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) { 3127 assert(_isPrivileged_offset != 0, "offsets should have been initialized"); 3128 // Ensure klass is initialized 3129 InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->initialize(CHECK_0); 3130 // Allocate result 3131 oop result = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->allocate_instance(CHECK_0); 3132 // Fill in values 3133 result->obj_field_put(_context_offset, context()); 3134 result->obj_field_put(_privilegedContext_offset, privileged_context()); 3135 result->bool_field_put(_isPrivileged_offset, isPrivileged); 3136 // whitelist AccessControlContexts created by the JVM if present 3137 if (_isAuthorized_offset != -1) { 3138 result->bool_field_put(_isAuthorized_offset, true); 3139 } 3140 return result; 3141 } 3142 3143 3144 // Support for java_lang_ClassLoader 3145 3146 bool java_lang_ClassLoader::offsets_computed = false; 3147 int java_lang_ClassLoader::_loader_data_offset = -1; 3148 int java_lang_ClassLoader::parallelCapable_offset = -1; 3149 3150 ClassLoaderData** java_lang_ClassLoader::loader_data_addr(oop loader) { 3151 assert(loader != NULL && loader->is_oop(), "loader must be oop"); 3152 return (ClassLoaderData**) loader->address_field_addr(_loader_data_offset); 3153 } 3154 3155 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) { 3156 return *java_lang_ClassLoader::loader_data_addr(loader); 3157 } 3158 3159 void java_lang_ClassLoader::compute_offsets() { 3160 assert(!offsets_computed, "offsets should be initialized only once"); 3161 offsets_computed = true; 3162 3163 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7, 3164 Klass* k1 = SystemDictionary::ClassLoader_klass(); 3165 compute_optional_offset(parallelCapable_offset, 3166 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature()); 3167 3168 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3169 } 3170 3171 oop java_lang_ClassLoader::parent(oop loader) { 3172 assert(is_instance(loader), "loader must be oop"); 3173 return loader->obj_field(parent_offset); 3174 } 3175 3176 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) { 3177 assert(is_instance(loader), "loader must be oop"); 3178 assert(cl == NULL || is_instance(cl), "cl argument must be oop"); 3179 oop acl = loader; 3180 debug_only(jint loop_count = 0); 3181 // This loop taken verbatim from ClassLoader.java: 3182 do { 3183 acl = parent(acl); 3184 if (cl == acl) { 3185 return true; 3186 } 3187 assert(++loop_count > 0, "loop_count overflow"); 3188 } while (acl != NULL); 3189 return false; 3190 } 3191 3192 bool java_lang_ClassLoader::is_instance(oop obj) { 3193 return obj != NULL && is_subclass(obj->klass()); 3194 } 3195 3196 3197 // For class loader classes, parallelCapable defined 3198 // based on non-null field 3199 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it 3200 bool java_lang_ClassLoader::parallelCapable(oop class_loader) { 3201 if (parallelCapable_offset == -1) { 3202 // Default for backward compatibility is false 3203 return false; 3204 } 3205 return (class_loader->obj_field(parallelCapable_offset) != NULL); 3206 } 3207 3208 bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 3209 // Fix for 4474172; see evaluation for more details 3210 loader = non_reflection_class_loader(loader); 3211 3212 oop cl = SystemDictionary::java_system_loader(); 3213 while(cl != NULL) { 3214 if (cl == loader) return true; 3215 cl = parent(cl); 3216 } 3217 return false; 3218 } 3219 3220 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) { 3221 if (loader != NULL) { 3222 // See whether this is one of the class loaders associated with 3223 // the generated bytecodes for reflection, and if so, "magically" 3224 // delegate to its parent to prevent class loading from occurring 3225 // in places where applications using reflection didn't expect it. 3226 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass(); 3227 // This might be null in non-1.4 JDKs 3228 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) { 3229 return parent(loader); 3230 } 3231 } 3232 return loader; 3233 } 3234 3235 3236 // Support for java_lang_System 3237 int java_lang_System::in_offset_in_bytes() { 3238 return (InstanceMirrorKlass::offset_of_static_fields() + static_in_offset); 3239 } 3240 3241 3242 int java_lang_System::out_offset_in_bytes() { 3243 return (InstanceMirrorKlass::offset_of_static_fields() + static_out_offset); 3244 } 3245 3246 3247 int java_lang_System::err_offset_in_bytes() { 3248 return (InstanceMirrorKlass::offset_of_static_fields() + static_err_offset); 3249 } 3250 3251 3252 bool java_lang_System::has_security_manager() { 3253 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::System_klass()); 3254 address addr = ik->static_field_addr(static_security_offset); 3255 if (UseCompressedOops) { 3256 return oopDesc::load_decode_heap_oop((narrowOop *)addr) != NULL; 3257 } else { 3258 return oopDesc::load_decode_heap_oop((oop*)addr) != NULL; 3259 } 3260 } 3261 3262 int java_lang_Class::_klass_offset; 3263 int java_lang_Class::_array_klass_offset; 3264 int java_lang_Class::_oop_size_offset; 3265 int java_lang_Class::_static_oop_field_count_offset; 3266 int java_lang_Class::_class_loader_offset; 3267 int java_lang_Class::_protection_domain_offset; 3268 int java_lang_Class::_component_mirror_offset; 3269 int java_lang_Class::_init_lock_offset; 3270 int java_lang_Class::_signers_offset; 3271 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL; 3272 int java_lang_Throwable::backtrace_offset; 3273 int java_lang_Throwable::detailMessage_offset; 3274 int java_lang_Throwable::cause_offset; 3275 int java_lang_Throwable::stackTrace_offset; 3276 int java_lang_Throwable::static_unassigned_stacktrace_offset; 3277 int java_lang_reflect_AccessibleObject::override_offset; 3278 int java_lang_reflect_Method::clazz_offset; 3279 int java_lang_reflect_Method::name_offset; 3280 int java_lang_reflect_Method::returnType_offset; 3281 int java_lang_reflect_Method::parameterTypes_offset; 3282 int java_lang_reflect_Method::exceptionTypes_offset; 3283 int java_lang_reflect_Method::slot_offset; 3284 int java_lang_reflect_Method::modifiers_offset; 3285 int java_lang_reflect_Method::signature_offset; 3286 int java_lang_reflect_Method::annotations_offset; 3287 int java_lang_reflect_Method::parameter_annotations_offset; 3288 int java_lang_reflect_Method::annotation_default_offset; 3289 int java_lang_reflect_Method::type_annotations_offset; 3290 int java_lang_reflect_Constructor::clazz_offset; 3291 int java_lang_reflect_Constructor::parameterTypes_offset; 3292 int java_lang_reflect_Constructor::exceptionTypes_offset; 3293 int java_lang_reflect_Constructor::slot_offset; 3294 int java_lang_reflect_Constructor::modifiers_offset; 3295 int java_lang_reflect_Constructor::signature_offset; 3296 int java_lang_reflect_Constructor::annotations_offset; 3297 int java_lang_reflect_Constructor::parameter_annotations_offset; 3298 int java_lang_reflect_Constructor::type_annotations_offset; 3299 int java_lang_reflect_Field::clazz_offset; 3300 int java_lang_reflect_Field::name_offset; 3301 int java_lang_reflect_Field::type_offset; 3302 int java_lang_reflect_Field::slot_offset; 3303 int java_lang_reflect_Field::modifiers_offset; 3304 int java_lang_reflect_Field::signature_offset; 3305 int java_lang_reflect_Field::annotations_offset; 3306 int java_lang_reflect_Field::type_annotations_offset; 3307 int java_lang_reflect_Parameter::name_offset; 3308 int java_lang_reflect_Parameter::modifiers_offset; 3309 int java_lang_reflect_Parameter::index_offset; 3310 int java_lang_reflect_Parameter::executable_offset; 3311 int java_lang_boxing_object::value_offset; 3312 int java_lang_boxing_object::long_value_offset; 3313 int java_lang_ref_Reference::referent_offset; 3314 int java_lang_ref_Reference::queue_offset; 3315 int java_lang_ref_Reference::next_offset; 3316 int java_lang_ref_Reference::discovered_offset; 3317 int java_lang_ref_Reference::static_lock_offset; 3318 int java_lang_ref_Reference::static_pending_offset; 3319 int java_lang_ref_Reference::number_of_fake_oop_fields; 3320 int java_lang_ref_SoftReference::timestamp_offset; 3321 int java_lang_ref_SoftReference::static_clock_offset; 3322 int java_lang_ClassLoader::parent_offset; 3323 int java_lang_System::static_in_offset; 3324 int java_lang_System::static_out_offset; 3325 int java_lang_System::static_err_offset; 3326 int java_lang_System::static_security_offset; 3327 int java_lang_StackTraceElement::declaringClass_offset; 3328 int java_lang_StackTraceElement::methodName_offset; 3329 int java_lang_StackTraceElement::fileName_offset; 3330 int java_lang_StackTraceElement::lineNumber_offset; 3331 int java_lang_StackFrameInfo::declaringClass_offset; 3332 int java_lang_StackFrameInfo::memberName_offset; 3333 int java_lang_StackFrameInfo::mid_offset; 3334 int java_lang_StackFrameInfo::bci_offset; 3335 int java_lang_StackFrameInfo::methodName_offset; 3336 int java_lang_StackFrameInfo::fileName_offset; 3337 int java_lang_StackFrameInfo::lineNumber_offset; 3338 int java_lang_LiveStackFrameInfo::monitors_offset; 3339 int java_lang_LiveStackFrameInfo::locals_offset; 3340 int java_lang_LiveStackFrameInfo::operands_offset; 3341 int java_lang_AssertionStatusDirectives::classes_offset; 3342 int java_lang_AssertionStatusDirectives::classEnabled_offset; 3343 int java_lang_AssertionStatusDirectives::packages_offset; 3344 int java_lang_AssertionStatusDirectives::packageEnabled_offset; 3345 int java_lang_AssertionStatusDirectives::deflt_offset; 3346 int java_nio_Buffer::_limit_offset; 3347 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0; 3348 int sun_reflect_ConstantPool::_oop_offset; 3349 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset; 3350 3351 3352 // Support for java_lang_StackTraceElement 3353 3354 void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 3355 element->obj_field_put(fileName_offset, value); 3356 } 3357 3358 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 3359 element->obj_field_put(declaringClass_offset, value); 3360 } 3361 3362 void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 3363 element->obj_field_put(methodName_offset, value); 3364 } 3365 3366 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 3367 element->int_field_put(lineNumber_offset, value); 3368 } 3369 3370 // Support for java_lang_StackFrameInfo 3371 void java_lang_StackFrameInfo::set_declaringClass(oop element, oop value) { 3372 element->obj_field_put(declaringClass_offset, value); 3373 } 3374 3375 void java_lang_StackFrameInfo::set_mid(oop element, int value) { 3376 element->int_field_put(mid_offset, value); 3377 } 3378 void java_lang_StackFrameInfo::set_bci(oop element, int value) { 3379 element->int_field_put(bci_offset, value); 3380 } 3381 3382 void java_lang_StackFrameInfo::set_fileName(oop element, oop value) { 3383 element->obj_field_put(fileName_offset, value); 3384 } 3385 3386 void java_lang_StackFrameInfo::set_methodName(oop element, oop value) { 3387 element->obj_field_put(methodName_offset, value); 3388 } 3389 3390 void java_lang_StackFrameInfo::set_lineNumber(oop element, int value) { 3391 element->int_field_put(lineNumber_offset, value); 3392 } 3393 3394 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) { 3395 element->obj_field_put(monitors_offset, value); 3396 } 3397 3398 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) { 3399 element->obj_field_put(locals_offset, value); 3400 } 3401 3402 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) { 3403 element->obj_field_put(operands_offset, value); 3404 } 3405 3406 // Support for java Assertions - java_lang_AssertionStatusDirectives. 3407 3408 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 3409 o->obj_field_put(classes_offset, val); 3410 } 3411 3412 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 3413 o->obj_field_put(classEnabled_offset, val); 3414 } 3415 3416 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 3417 o->obj_field_put(packages_offset, val); 3418 } 3419 3420 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 3421 o->obj_field_put(packageEnabled_offset, val); 3422 } 3423 3424 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 3425 o->bool_field_put(deflt_offset, val); 3426 } 3427 3428 3429 // Support for intrinsification of java.nio.Buffer.checkIndex 3430 int java_nio_Buffer::limit_offset() { 3431 return _limit_offset; 3432 } 3433 3434 3435 void java_nio_Buffer::compute_offsets() { 3436 Klass* k = SystemDictionary::nio_Buffer_klass(); 3437 assert(k != NULL, "must be loaded in 1.4+"); 3438 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature()); 3439 } 3440 3441 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) { 3442 if (_owner_offset != 0) return; 3443 3444 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK); 3445 Klass* k = SystemDictionary::abstract_ownable_synchronizer_klass(); 3446 compute_offset(_owner_offset, k, 3447 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature()); 3448 } 3449 3450 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 3451 assert(_owner_offset != 0, "Must be initialized"); 3452 return obj->obj_field(_owner_offset); 3453 } 3454 3455 // Compute hard-coded offsets 3456 // Invoked before SystemDictionary::initialize, so pre-loaded classes 3457 // are not available to determine the offset_of_static_fields. 3458 void JavaClasses::compute_hard_coded_offsets() { 3459 const int x = heapOopSize; 3460 const int header = instanceOopDesc::base_offset_in_bytes(); 3461 3462 // Throwable Class 3463 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header; 3464 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header; 3465 java_lang_Throwable::cause_offset = java_lang_Throwable::hc_cause_offset * x + header; 3466 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header; 3467 java_lang_Throwable::static_unassigned_stacktrace_offset = java_lang_Throwable::hc_static_unassigned_stacktrace_offset * x; 3468 3469 // java_lang_boxing_object 3470 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header; 3471 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong); 3472 3473 // java_lang_ref_Reference: 3474 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header; 3475 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header; 3476 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header; 3477 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header; 3478 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x; 3479 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x; 3480 // Artificial fields for java_lang_ref_Reference 3481 // The first field is for the discovered field added in 1.4 3482 java_lang_ref_Reference::number_of_fake_oop_fields = 1; 3483 3484 // java_lang_ref_SoftReference Class 3485 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong); 3486 // Don't multiply static fields because they are always in wordSize units 3487 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x; 3488 3489 // java_lang_ClassLoader 3490 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header; 3491 3492 // java_lang_System 3493 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x; 3494 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x; 3495 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x; 3496 java_lang_System::static_security_offset = java_lang_System::hc_static_security_offset * x; 3497 3498 // java_lang_StackTraceElement 3499 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header; 3500 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header; 3501 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header; 3502 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header; 3503 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header; 3504 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header; 3505 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header; 3506 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header; 3507 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header; 3508 3509 } 3510 3511 3512 // Compute non-hard-coded field offsets of all the classes in this file 3513 void JavaClasses::compute_offsets() { 3514 // java_lang_Class::compute_offsets was called earlier in bootstrap 3515 java_lang_ClassLoader::compute_offsets(); 3516 java_lang_Thread::compute_offsets(); 3517 java_lang_ThreadGroup::compute_offsets(); 3518 java_lang_invoke_MethodHandle::compute_offsets(); 3519 java_lang_invoke_DirectMethodHandle::compute_offsets(); 3520 java_lang_invoke_MemberName::compute_offsets(); 3521 java_lang_invoke_LambdaForm::compute_offsets(); 3522 java_lang_invoke_MethodType::compute_offsets(); 3523 java_lang_invoke_CallSite::compute_offsets(); 3524 java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets(); 3525 java_security_AccessControlContext::compute_offsets(); 3526 // Initialize reflection classes. The layouts of these classes 3527 // changed with the new reflection implementation in JDK 1.4, and 3528 // since the Universe doesn't know what JDK version it is until this 3529 // point we defer computation of these offsets until now. 3530 java_lang_reflect_AccessibleObject::compute_offsets(); 3531 java_lang_reflect_Method::compute_offsets(); 3532 java_lang_reflect_Constructor::compute_offsets(); 3533 java_lang_reflect_Field::compute_offsets(); 3534 java_nio_Buffer::compute_offsets(); 3535 sun_reflect_ConstantPool::compute_offsets(); 3536 sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets(); 3537 java_lang_reflect_Parameter::compute_offsets(); 3538 java_lang_StackFrameInfo::compute_offsets(); 3539 java_lang_LiveStackFrameInfo::compute_offsets(); 3540 3541 // generated interpreter code wants to know about the offsets we just computed: 3542 AbstractAssembler::update_delayed_values(); 3543 } 3544 3545 #ifndef PRODUCT 3546 3547 // These functions exist to assert the validity of hard-coded field offsets to guard 3548 // against changes in the class files 3549 3550 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 3551 EXCEPTION_MARK; 3552 fieldDescriptor fd; 3553 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3554 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3555 instanceKlassHandle h_klass (THREAD, k); 3556 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3557 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3558 if (!h_klass->find_local_field(f_name, f_sig, &fd)) { 3559 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 3560 return false; 3561 } 3562 if (fd.is_static()) { 3563 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 3564 return false; 3565 } 3566 if (fd.offset() == hardcoded_offset ) { 3567 return true; 3568 } else { 3569 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.", 3570 klass_name, field_name, hardcoded_offset, fd.offset()); 3571 return false; 3572 } 3573 } 3574 3575 3576 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 3577 EXCEPTION_MARK; 3578 fieldDescriptor fd; 3579 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3580 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3581 instanceKlassHandle h_klass (THREAD, k); 3582 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3583 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3584 if (!h_klass->find_local_field(f_name, f_sig, &fd)) { 3585 tty->print_cr("Static field %s.%s not found", klass_name, field_name); 3586 return false; 3587 } 3588 if (!fd.is_static()) { 3589 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name); 3590 return false; 3591 } 3592 if (fd.offset() == hardcoded_offset + InstanceMirrorKlass::offset_of_static_fields()) { 3593 return true; 3594 } else { 3595 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()); 3596 return false; 3597 } 3598 } 3599 3600 3601 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) { 3602 EXCEPTION_MARK; 3603 fieldDescriptor fd; 3604 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3605 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3606 instanceKlassHandle h_klass (THREAD, k); 3607 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3608 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3609 if (!h_klass->find_local_field(f_name, f_sig, &fd)) { 3610 tty->print_cr("Static field %s.%s not found", klass_name, field_name); 3611 return false; 3612 } 3613 if (!fd.is_static() || !fd.has_initial_value()) { 3614 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name); 3615 return false; 3616 } 3617 if (!fd.initial_value_tag().is_int()) { 3618 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name); 3619 return false; 3620 } 3621 jint field_value = fd.int_initial_value(); 3622 if (field_value == hardcoded_constant) { 3623 return true; 3624 } else { 3625 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); 3626 return false; 3627 } 3628 } 3629 3630 3631 // Check the hard-coded field offsets of all the classes in this file 3632 3633 void JavaClasses::check_offsets() { 3634 bool valid = true; 3635 HandleMark hm; 3636 3637 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3638 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig) 3639 3640 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3641 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig) 3642 3643 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3644 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig) 3645 3646 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \ 3647 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig) 3648 3649 // java.lang.String 3650 3651 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C"); 3652 if (java_lang_String::has_offset_field()) { 3653 CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I"); 3654 CHECK_OFFSET("java/lang/String", java_lang_String, count, "I"); 3655 } 3656 if (java_lang_String::has_hash_field()) { 3657 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I"); 3658 } 3659 3660 // java.lang.Class 3661 3662 // Fake fields 3663 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked 3664 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked 3665 3666 // java.lang.Throwable 3667 3668 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;"); 3669 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;"); 3670 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;"); 3671 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;"); 3672 3673 // Boxed primitive objects (java_lang_boxing_object) 3674 3675 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 3676 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 3677 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 3678 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 3679 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 3680 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 3681 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 3682 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 3683 3684 // java.lang.ClassLoader 3685 3686 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;"); 3687 3688 // java.lang.System 3689 3690 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;"); 3691 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;"); 3692 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;"); 3693 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, security, "Ljava/lang/SecurityManager;"); 3694 3695 // java.lang.StackTraceElement 3696 3697 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;"); 3698 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;"); 3699 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;"); 3700 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I"); 3701 3702 // java.lang.ref.Reference 3703 3704 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;"); 3705 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;"); 3706 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;"); 3707 // Fake field 3708 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;"); 3709 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;"); 3710 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;"); 3711 3712 // java.lang.ref.SoftReference 3713 3714 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J"); 3715 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J"); 3716 3717 // java.lang.AssertionStatusDirectives 3718 // 3719 // The CheckAssertionStatusDirectives boolean can be removed from here and 3720 // globals.hpp after the AssertionStatusDirectives class has been integrated 3721 // into merlin "for some time." Without it, the vm will fail with early 3722 // merlin builds. 3723 3724 if (CheckAssertionStatusDirectives) { 3725 const char* nm = "java/lang/AssertionStatusDirectives"; 3726 const char* sig = "[Ljava/lang/String;"; 3727 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig); 3728 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z"); 3729 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig); 3730 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z"); 3731 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z"); 3732 } 3733 3734 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed"); 3735 } 3736 3737 #endif // PRODUCT 3738 3739 int InjectedField::compute_offset() { 3740 Klass* klass_oop = klass(); 3741 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) { 3742 if (!may_be_java && !fs.access_flags().is_internal()) { 3743 // Only look at injected fields 3744 continue; 3745 } 3746 if (fs.name() == name() && fs.signature() == signature()) { 3747 return fs.offset(); 3748 } 3749 } 3750 ResourceMark rm; 3751 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)" : ""); 3752 #ifndef PRODUCT 3753 klass_oop->print(); 3754 tty->print_cr("all fields:"); 3755 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) { 3756 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 3757 } 3758 #endif //PRODUCT 3759 vm_exit_during_initialization("Invalid layout of preloaded class: use -XX:+TraceClassLoading to see the origin of the problem class"); 3760 return -1; 3761 } 3762 3763 void javaClasses_init() { 3764 JavaClasses::compute_offsets(); 3765 JavaClasses::check_offsets(); 3766 FilteredFieldsMap::initialize(); // must be done after computing offsets. 3767 }