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 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC 61 62 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \ 63 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum); 64 65 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \ 66 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java }, 67 68 InjectedField JavaClasses::_injected_fields[] = { 69 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD) 70 }; 71 72 int JavaClasses::compute_injected_offset(InjectedFieldID id) { 73 return _injected_fields[id].compute_offset(); 74 } 75 76 77 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) { 78 *field_count = 0; 79 80 vmSymbols::SID sid = vmSymbols::find_sid(class_name); 81 if (sid == vmSymbols::NO_SID) { 82 // Only well known classes can inject fields 83 return NULL; 84 } 85 86 int count = 0; 87 int start = -1; 88 89 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \ 90 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \ 91 count++; \ 92 if (start == -1) start = klass##_##name##_enum; \ 93 } 94 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD); 95 #undef LOOKUP_INJECTED_FIELD 96 97 if (start != -1) { 98 *field_count = count; 99 return _injected_fields + start; 100 } 101 return NULL; 102 } 103 104 105 static bool find_field(InstanceKlass* ik, 106 Symbol* name_symbol, Symbol* signature_symbol, 107 fieldDescriptor* fd, 108 bool is_static = false, bool allow_super = false) { 109 if (allow_super || is_static) { 110 return ik->find_field(name_symbol, signature_symbol, is_static, fd) != NULL; 111 } else { 112 return ik->find_local_field(name_symbol, signature_symbol, fd); 113 } 114 } 115 116 // Helpful routine for computing field offsets at run time rather than hardcoding them 117 static void 118 compute_offset(int &dest_offset, 119 Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol, 120 bool is_static = false, bool allow_super = false) { 121 fieldDescriptor fd; 122 InstanceKlass* ik = InstanceKlass::cast(klass_oop); 123 if (!find_field(ik, name_symbol, signature_symbol, &fd, is_static, allow_super)) { 124 ResourceMark rm; 125 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string()); 126 #ifndef PRODUCT 127 klass_oop->print(); 128 tty->print_cr("all fields:"); 129 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) { 130 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 131 } 132 #endif //PRODUCT 133 vm_exit_during_initialization("Invalid layout of preloaded class: use -XX:+TraceClassLoading to see the origin of the problem class"); 134 } 135 dest_offset = fd.offset(); 136 } 137 138 // Same as above but for "optional" offsets that might not be present in certain JDK versions 139 static void 140 compute_optional_offset(int& dest_offset, 141 Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol, 142 bool allow_super = false) { 143 fieldDescriptor fd; 144 InstanceKlass* ik = InstanceKlass::cast(klass_oop); 145 if (find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) { 146 dest_offset = fd.offset(); 147 } 148 } 149 150 151 int java_lang_String::value_offset = 0; 152 int java_lang_String::offset_offset = 0; 153 int java_lang_String::count_offset = 0; 154 int java_lang_String::hash_offset = 0; 155 156 bool java_lang_String::initialized = false; 157 158 bool java_lang_String::is_instance(oop obj) { 159 return is_instance_inlined(obj); 160 } 161 162 void java_lang_String::compute_offsets() { 163 assert(!initialized, "offsets should be initialized only once"); 164 165 Klass* k = SystemDictionary::String_klass(); 166 compute_offset(value_offset, k, vmSymbols::value_name(), vmSymbols::char_array_signature()); 167 compute_optional_offset(offset_offset, k, vmSymbols::offset_name(), vmSymbols::int_signature()); 168 compute_optional_offset(count_offset, k, vmSymbols::count_name(), vmSymbols::int_signature()); 169 compute_optional_offset(hash_offset, k, vmSymbols::hash_name(), vmSymbols::int_signature()); 170 171 initialized = true; 172 } 173 174 Handle java_lang_String::basic_create(int length, TRAPS) { 175 assert(initialized, "Must be initialized"); 176 // Create the String object first, so there's a chance that the String 177 // and the char array it points to end up in the same cache line. 178 oop obj; 179 obj = InstanceKlass::cast(SystemDictionary::String_klass())->allocate_instance(CHECK_NH); 180 181 // Create the char array. The String object must be handlized here 182 // because GC can happen as a result of the allocation attempt. 183 Handle h_obj(THREAD, obj); 184 typeArrayOop buffer; 185 buffer = oopFactory::new_charArray(length, CHECK_NH); 186 187 // Point the String at the char array 188 obj = h_obj(); 189 set_value(obj, buffer); 190 // No need to zero the offset, allocation zero'ed the entire String object 191 assert(offset(obj) == 0, "initial String offset should be zero"); 192 //set_offset(obj, 0); 193 set_count(obj, length); 194 195 return h_obj; 196 } 197 198 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) { 199 Handle h_obj = basic_create(length, CHECK_NH); 200 typeArrayOop buffer = value(h_obj()); 201 for (int index = 0; index < length; index++) { 202 buffer->char_at_put(index, unicode[index]); 203 } 204 return h_obj; 205 } 206 207 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) { 208 Handle h_obj = create_from_unicode(unicode, length, CHECK_0); 209 return h_obj(); 210 } 211 212 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) { 213 if (utf8_str == NULL) { 214 return Handle(); 215 } 216 int length = UTF8::unicode_length(utf8_str); 217 Handle h_obj = basic_create(length, CHECK_NH); 218 if (length > 0) { 219 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 220 } 221 return h_obj; 222 } 223 224 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) { 225 Handle h_obj = create_from_str(utf8_str, CHECK_0); 226 return h_obj(); 227 } 228 229 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) { 230 int length = UTF8::unicode_length((char*)symbol->bytes(), symbol->utf8_length()); 231 Handle h_obj = basic_create(length, CHECK_NH); 232 if (length > 0) { 233 UTF8::convert_to_unicode((char*)symbol->bytes(), value(h_obj())->char_at_addr(0), length); 234 } 235 return h_obj; 236 } 237 238 // Converts a C string to a Java String based on current encoding 239 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) { 240 assert(str != NULL, "bad arguments"); 241 242 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *); 243 static to_java_string_fn_t _to_java_string_fn = NULL; 244 245 if (_to_java_string_fn == NULL) { 246 void *lib_handle = os::native_java_library(); 247 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform")); 248 if (_to_java_string_fn == NULL) { 249 fatal("NewStringPlatform missing"); 250 } 251 } 252 253 jstring js = NULL; 254 { JavaThread* thread = (JavaThread*)THREAD; 255 assert(thread->is_Java_thread(), "must be java thread"); 256 HandleMark hm(thread); 257 ThreadToNativeFromVM ttn(thread); 258 js = (_to_java_string_fn)(thread->jni_environment(), str); 259 } 260 return Handle(THREAD, JNIHandles::resolve(js)); 261 } 262 263 // Converts a Java String to a native C string that can be used for 264 // native OS calls. 265 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) { 266 267 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*); 268 static to_platform_string_fn_t _to_platform_string_fn = NULL; 269 270 if (_to_platform_string_fn == NULL) { 271 void *lib_handle = os::native_java_library(); 272 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars")); 273 if (_to_platform_string_fn == NULL) { 274 fatal("GetStringPlatformChars missing"); 275 } 276 } 277 278 char *native_platform_string; 279 { JavaThread* thread = (JavaThread*)THREAD; 280 assert(thread->is_Java_thread(), "must be java thread"); 281 JNIEnv *env = thread->jni_environment(); 282 jstring js = (jstring) JNIHandles::make_local(env, java_string()); 283 bool is_copy; 284 HandleMark hm(thread); 285 ThreadToNativeFromVM ttn(thread); 286 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy); 287 assert(is_copy == JNI_TRUE, "is_copy value changed"); 288 JNIHandles::destroy_local(js); 289 } 290 return native_platform_string; 291 } 292 293 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) { 294 oop obj = java_string(); 295 // Typical usage is to convert all '/' to '.' in string. 296 typeArrayOop value = java_lang_String::value(obj); 297 int offset = java_lang_String::offset(obj); 298 int length = java_lang_String::length(obj); 299 300 // First check if any from_char exist 301 int index; // Declared outside, used later 302 for (index = 0; index < length; index++) { 303 if (value->char_at(index + offset) == from_char) { 304 break; 305 } 306 } 307 if (index == length) { 308 // No from_char, so do not copy. 309 return java_string; 310 } 311 312 // Create new UNICODE buffer. Must handlize value because GC 313 // may happen during String and char array creation. 314 typeArrayHandle h_value(THREAD, value); 315 Handle string = basic_create(length, CHECK_NH); 316 317 typeArrayOop from_buffer = h_value(); 318 typeArrayOop to_buffer = java_lang_String::value(string()); 319 320 // Copy contents 321 for (index = 0; index < length; index++) { 322 jchar c = from_buffer->char_at(index + offset); 323 if (c == from_char) { 324 c = to_char; 325 } 326 to_buffer->char_at_put(index, c); 327 } 328 return string; 329 } 330 331 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) { 332 typeArrayOop value = java_lang_String::value(java_string); 333 int offset = java_lang_String::offset(java_string); 334 length = java_lang_String::length(java_string); 335 336 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length); 337 if (result != NULL) { 338 for (int index = 0; index < length; index++) { 339 result[index] = value->char_at(index + offset); 340 } 341 } else { 342 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string"); 343 } 344 return result; 345 } 346 347 unsigned int java_lang_String::hash_code(oop java_string) { 348 int length = java_lang_String::length(java_string); 349 // Zero length string will hash to zero with String.hashCode() function. 350 if (length == 0) return 0; 351 352 typeArrayOop value = java_lang_String::value(java_string); 353 int offset = java_lang_String::offset(java_string); 354 return java_lang_String::hash_code(value->char_at_addr(offset), length); 355 } 356 357 char* java_lang_String::as_quoted_ascii(oop java_string) { 358 typeArrayOop value = java_lang_String::value(java_string); 359 int offset = java_lang_String::offset(java_string); 360 int length = java_lang_String::length(java_string); 361 362 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset); 363 if (base == NULL) return NULL; 364 365 int result_length = UNICODE::quoted_ascii_length(base, length) + 1; 366 char* result = NEW_RESOURCE_ARRAY(char, result_length); 367 UNICODE::as_quoted_ascii(base, length, result, result_length); 368 assert(result_length >= length + 1, "must not be shorter"); 369 assert(result_length == (int)strlen(result) + 1, "must match"); 370 return result; 371 } 372 373 unsigned int java_lang_String::hash_string(oop java_string) { 374 int length = java_lang_String::length(java_string); 375 // Zero length string doesn't hash necessarily hash to zero. 376 if (length == 0) { 377 return StringTable::hash_string(NULL, 0); 378 } 379 380 typeArrayOop value = java_lang_String::value(java_string); 381 int offset = java_lang_String::offset(java_string); 382 return StringTable::hash_string(value->char_at_addr(offset), length); 383 } 384 385 Symbol* java_lang_String::as_symbol(Handle java_string, TRAPS) { 386 oop obj = java_string(); 387 typeArrayOop value = java_lang_String::value(obj); 388 int offset = java_lang_String::offset(obj); 389 int length = java_lang_String::length(obj); 390 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset); 391 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD); 392 return sym; 393 } 394 395 Symbol* java_lang_String::as_symbol_or_null(oop java_string) { 396 typeArrayOop value = java_lang_String::value(java_string); 397 int offset = java_lang_String::offset(java_string); 398 int length = java_lang_String::length(java_string); 399 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset); 400 return SymbolTable::probe_unicode(base, length); 401 } 402 403 404 int java_lang_String::utf8_length(oop java_string) { 405 typeArrayOop value = java_lang_String::value(java_string); 406 int offset = java_lang_String::offset(java_string); 407 int length = java_lang_String::length(java_string); 408 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset); 409 return UNICODE::utf8_length(position, length); 410 } 411 412 char* java_lang_String::as_utf8_string(oop java_string) { 413 typeArrayOop value = java_lang_String::value(java_string); 414 int offset = java_lang_String::offset(java_string); 415 int length = java_lang_String::length(java_string); 416 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset); 417 return UNICODE::as_utf8(position, length); 418 } 419 420 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) { 421 typeArrayOop value = java_lang_String::value(java_string); 422 int offset = java_lang_String::offset(java_string); 423 int length = java_lang_String::length(java_string); 424 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset); 425 return UNICODE::as_utf8(position, length, buf, buflen); 426 } 427 428 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) { 429 typeArrayOop value = java_lang_String::value(java_string); 430 int offset = java_lang_String::offset(java_string); 431 int length = java_lang_String::length(java_string); 432 assert(start + len <= length, "just checking"); 433 jchar* position = value->char_at_addr(offset + start); 434 return UNICODE::as_utf8(position, len); 435 } 436 437 char* java_lang_String::as_utf8_string(oop java_string, int start, int len, char* buf, int buflen) { 438 typeArrayOop value = java_lang_String::value(java_string); 439 int offset = java_lang_String::offset(java_string); 440 int length = java_lang_String::length(java_string); 441 assert(start + len <= length, "just checking"); 442 jchar* position = value->char_at_addr(offset + start); 443 return UNICODE::as_utf8(position, len, buf, buflen); 444 } 445 446 bool java_lang_String::equals(oop java_string, jchar* chars, int len) { 447 assert(java_string->klass() == SystemDictionary::String_klass(), 448 "must be java_string"); 449 typeArrayOop value = java_lang_String::value(java_string); 450 int offset = java_lang_String::offset(java_string); 451 int length = java_lang_String::length(java_string); 452 if (length != len) { 453 return false; 454 } 455 for (int i = 0; i < len; i++) { 456 if (value->char_at(i + offset) != chars[i]) { 457 return false; 458 } 459 } 460 return true; 461 } 462 463 bool java_lang_String::equals(oop str1, oop str2) { 464 assert(str1->klass() == SystemDictionary::String_klass(), 465 "must be java String"); 466 assert(str2->klass() == SystemDictionary::String_klass(), 467 "must be java String"); 468 typeArrayOop value1 = java_lang_String::value(str1); 469 int offset1 = java_lang_String::offset(str1); 470 int length1 = java_lang_String::length(str1); 471 typeArrayOop value2 = java_lang_String::value(str2); 472 int offset2 = java_lang_String::offset(str2); 473 int length2 = java_lang_String::length(str2); 474 475 if (length1 != length2) { 476 return false; 477 } 478 for (int i = 0; i < length1; i++) { 479 if (value1->char_at(i + offset1) != value2->char_at(i + offset2)) { 480 return false; 481 } 482 } 483 return true; 484 } 485 486 void java_lang_String::print(oop java_string, outputStream* st) { 487 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string"); 488 typeArrayOop value = java_lang_String::value(java_string); 489 490 if (value == NULL) { 491 // This can happen if, e.g., printing a String 492 // object before its initializer has been called 493 st->print("NULL"); 494 return; 495 } 496 497 int offset = java_lang_String::offset(java_string); 498 int length = java_lang_String::length(java_string); 499 500 st->print("\""); 501 for (int index = 0; index < length; index++) { 502 st->print("%c", value->char_at(index + offset)); 503 } 504 st->print("\""); 505 } 506 507 508 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 509 assert(mirror.not_null() && fd->is_static(), "just checking"); 510 if (fd->has_initial_value()) { 511 BasicType t = fd->field_type(); 512 switch (t) { 513 case T_BYTE: 514 mirror()->byte_field_put(fd->offset(), fd->int_initial_value()); 515 break; 516 case T_BOOLEAN: 517 mirror()->bool_field_put(fd->offset(), fd->int_initial_value()); 518 break; 519 case T_CHAR: 520 mirror()->char_field_put(fd->offset(), fd->int_initial_value()); 521 break; 522 case T_SHORT: 523 mirror()->short_field_put(fd->offset(), fd->int_initial_value()); 524 break; 525 case T_INT: 526 mirror()->int_field_put(fd->offset(), fd->int_initial_value()); 527 break; 528 case T_FLOAT: 529 mirror()->float_field_put(fd->offset(), fd->float_initial_value()); 530 break; 531 case T_DOUBLE: 532 mirror()->double_field_put(fd->offset(), fd->double_initial_value()); 533 break; 534 case T_LONG: 535 mirror()->long_field_put(fd->offset(), fd->long_initial_value()); 536 break; 537 case T_OBJECT: 538 { 539 #ifdef ASSERT 540 TempNewSymbol sym = SymbolTable::new_symbol("Ljava/lang/String;", CHECK); 541 assert(fd->signature() == sym, "just checking"); 542 #endif 543 oop string = fd->string_initial_value(CHECK); 544 mirror()->obj_field_put(fd->offset(), string); 545 } 546 break; 547 default: 548 THROW_MSG(vmSymbols::java_lang_ClassFormatError(), 549 "Illegal ConstantValue attribute in class file"); 550 } 551 } 552 } 553 554 555 void java_lang_Class::fixup_mirror(KlassHandle k, TRAPS) { 556 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already"); 557 558 // If the offset was read from the shared archive, it was fixed up already 559 if (!k->is_shared()) { 560 if (k->oop_is_instance()) { 561 // During bootstrap, java.lang.Class wasn't loaded so static field 562 // offsets were computed without the size added it. Go back and 563 // update all the static field offsets to included the size. 564 for (JavaFieldStream fs(InstanceKlass::cast(k())); !fs.done(); fs.next()) { 565 if (fs.access_flags().is_static()) { 566 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields(); 567 fs.set_offset(real_offset); 568 } 569 } 570 } 571 } 572 create_mirror(k, Handle(NULL), Handle(NULL), CHECK); 573 } 574 575 void java_lang_Class::initialize_mirror_fields(KlassHandle k, 576 Handle mirror, 577 Handle protection_domain, 578 TRAPS) { 579 // Allocate a simple java object for a lock. 580 // This needs to be a java object because during class initialization 581 // it can be held across a java call. 582 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK); 583 set_init_lock(mirror(), r); 584 585 // Set protection domain also 586 set_protection_domain(mirror(), protection_domain()); 587 588 // Initialize static fields 589 InstanceKlass::cast(k())->do_local_static_fields(&initialize_static_field, mirror, CHECK); 590 } 591 592 void java_lang_Class::create_mirror(KlassHandle k, Handle class_loader, 593 Handle protection_domain, TRAPS) { 594 assert(k->java_mirror() == NULL, "should only assign mirror once"); 595 // Use this moment of initialization to cache modifier_flags also, 596 // to support Class.getModifiers(). Instance classes recalculate 597 // the cached flags after the class file is parsed, but before the 598 // class is put into the system dictionary. 599 int computed_modifiers = k->compute_modifier_flags(CHECK); 600 k->set_modifier_flags(computed_modifiers); 601 // Class_klass has to be loaded because it is used to allocate 602 // the mirror. 603 if (SystemDictionary::Class_klass_loaded()) { 604 // Allocate mirror (java.lang.Class instance) 605 Handle mirror = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK); 606 607 // Setup indirection from mirror->klass 608 if (!k.is_null()) { 609 java_lang_Class::set_klass(mirror(), k()); 610 } 611 612 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass()); 613 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set"); 614 615 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror())); 616 617 // It might also have a component mirror. This mirror must already exist. 618 if (k->oop_is_array()) { 619 Handle comp_mirror; 620 if (k->oop_is_typeArray()) { 621 BasicType type = TypeArrayKlass::cast(k())->element_type(); 622 comp_mirror = Universe::java_mirror(type); 623 } else { 624 assert(k->oop_is_objArray(), "Must be"); 625 Klass* element_klass = ObjArrayKlass::cast(k())->element_klass(); 626 assert(element_klass != NULL, "Must have an element klass"); 627 comp_mirror = element_klass->java_mirror(); 628 } 629 assert(comp_mirror.not_null(), "must have a mirror"); 630 631 // Two-way link between the array klass and its component mirror: 632 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k 633 set_component_mirror(mirror(), comp_mirror()); 634 set_array_klass(comp_mirror(), k()); 635 } else { 636 assert(k->oop_is_instance(), "Must be"); 637 638 initialize_mirror_fields(k, mirror, protection_domain, THREAD); 639 if (HAS_PENDING_EXCEPTION) { 640 // If any of the fields throws an exception like OOM remove the klass field 641 // from the mirror so GC doesn't follow it after the klass has been deallocated. 642 // This mirror looks like a primitive type, which logically it is because it 643 // it represents no class. 644 java_lang_Class::set_klass(mirror(), NULL); 645 return; 646 } 647 } 648 649 // set the classLoader field in the java_lang_Class instance 650 assert(class_loader() == k->class_loader(), "should be same"); 651 set_class_loader(mirror(), class_loader()); 652 653 // Setup indirection from klass->mirror last 654 // after any exceptions can happen during allocations. 655 if (!k.is_null()) { 656 k->set_java_mirror(mirror()); 657 } 658 } else { 659 if (fixup_mirror_list() == NULL) { 660 GrowableArray<Klass*>* list = 661 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true); 662 set_fixup_mirror_list(list); 663 } 664 fixup_mirror_list()->push(k()); 665 } 666 } 667 668 669 int java_lang_Class::oop_size(oop java_class) { 670 assert(_oop_size_offset != 0, "must be set"); 671 return java_class->int_field(_oop_size_offset); 672 } 673 void java_lang_Class::set_oop_size(oop java_class, int size) { 674 assert(_oop_size_offset != 0, "must be set"); 675 java_class->int_field_put(_oop_size_offset, size); 676 } 677 int java_lang_Class::static_oop_field_count(oop java_class) { 678 assert(_static_oop_field_count_offset != 0, "must be set"); 679 return java_class->int_field(_static_oop_field_count_offset); 680 } 681 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) { 682 assert(_static_oop_field_count_offset != 0, "must be set"); 683 java_class->int_field_put(_static_oop_field_count_offset, size); 684 } 685 686 oop java_lang_Class::protection_domain(oop java_class) { 687 assert(_protection_domain_offset != 0, "must be set"); 688 return java_class->obj_field(_protection_domain_offset); 689 } 690 void java_lang_Class::set_protection_domain(oop java_class, oop pd) { 691 assert(_protection_domain_offset != 0, "must be set"); 692 java_class->obj_field_put(_protection_domain_offset, pd); 693 } 694 695 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) { 696 assert(_component_mirror_offset != 0, "must be set"); 697 java_class->obj_field_put(_component_mirror_offset, comp_mirror); 698 } 699 oop java_lang_Class::component_mirror(oop java_class) { 700 assert(_component_mirror_offset != 0, "must be set"); 701 return java_class->obj_field(_component_mirror_offset); 702 } 703 704 oop java_lang_Class::init_lock(oop java_class) { 705 assert(_init_lock_offset != 0, "must be set"); 706 return java_class->obj_field(_init_lock_offset); 707 } 708 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) { 709 assert(_init_lock_offset != 0, "must be set"); 710 java_class->obj_field_put(_init_lock_offset, init_lock); 711 } 712 713 objArrayOop java_lang_Class::signers(oop java_class) { 714 assert(_signers_offset != 0, "must be set"); 715 return (objArrayOop)java_class->obj_field(_signers_offset); 716 } 717 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) { 718 assert(_signers_offset != 0, "must be set"); 719 java_class->obj_field_put(_signers_offset, (oop)signers); 720 } 721 722 723 void java_lang_Class::set_class_loader(oop java_class, oop loader) { 724 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet. 725 if (_class_loader_offset != 0) { 726 java_class->obj_field_put(_class_loader_offset, loader); 727 } 728 } 729 730 oop java_lang_Class::class_loader(oop java_class) { 731 assert(_class_loader_offset != 0, "must be set"); 732 return java_class->obj_field(_class_loader_offset); 733 } 734 735 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) { 736 // This should be improved by adding a field at the Java level or by 737 // introducing a new VM klass (see comment in ClassFileParser) 738 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0); 739 if (type != T_VOID) { 740 Klass* aklass = Universe::typeArrayKlassObj(type); 741 assert(aklass != NULL, "correct bootstrap"); 742 set_array_klass(java_class, aklass); 743 } 744 #ifdef ASSERT 745 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass()); 746 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation"); 747 #endif 748 return java_class; 749 } 750 751 752 Klass* java_lang_Class::as_Klass(oop java_class) { 753 //%note memory_2 754 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 755 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset)); 756 assert(k == NULL || k->is_klass(), "type check"); 757 return k; 758 } 759 760 761 void java_lang_Class::set_klass(oop java_class, Klass* klass) { 762 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 763 java_class->metadata_field_put(_klass_offset, klass); 764 } 765 766 767 void java_lang_Class::print_signature(oop java_class, outputStream* st) { 768 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 769 Symbol* name = NULL; 770 bool is_instance = false; 771 if (is_primitive(java_class)) { 772 name = vmSymbols::type_signature(primitive_type(java_class)); 773 } else { 774 Klass* k = as_Klass(java_class); 775 is_instance = k->oop_is_instance(); 776 name = k->name(); 777 } 778 if (name == NULL) { 779 st->print("<null>"); 780 return; 781 } 782 if (is_instance) st->print("L"); 783 st->write((char*) name->base(), (int) name->utf8_length()); 784 if (is_instance) st->print(";"); 785 } 786 787 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) { 788 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 789 Symbol* name; 790 if (is_primitive(java_class)) { 791 name = vmSymbols::type_signature(primitive_type(java_class)); 792 // Because this can create a new symbol, the caller has to decrement 793 // the refcount, so make adjustment here and below for symbols returned 794 // that are not created or incremented due to a successful lookup. 795 name->increment_refcount(); 796 } else { 797 Klass* k = as_Klass(java_class); 798 if (!k->oop_is_instance()) { 799 name = k->name(); 800 name->increment_refcount(); 801 } else { 802 ResourceMark rm; 803 const char* sigstr = k->signature_name(); 804 int siglen = (int) strlen(sigstr); 805 if (!intern_if_not_found) { 806 name = SymbolTable::probe(sigstr, siglen); 807 } else { 808 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 809 } 810 } 811 } 812 return name; 813 } 814 815 // Returns the Java name for this Java mirror (Resource allocated) 816 // See Klass::external_name(). 817 // For primitive type Java mirrors, its type name is returned. 818 const char* java_lang_Class::as_external_name(oop java_class) { 819 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 820 const char* name = NULL; 821 if (is_primitive(java_class)) { 822 name = type2name(primitive_type(java_class)); 823 } else { 824 name = as_Klass(java_class)->external_name(); 825 } 826 if (name == NULL) { 827 name = "<null>"; 828 } 829 return name; 830 } 831 832 Klass* java_lang_Class::array_klass(oop java_class) { 833 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset)); 834 assert(k == NULL || k->is_klass() && k->oop_is_array(), "should be array klass"); 835 return k; 836 } 837 838 839 void java_lang_Class::set_array_klass(oop java_class, Klass* klass) { 840 assert(klass->is_klass() && klass->oop_is_array(), "should be array klass"); 841 java_class->metadata_field_put(_array_klass_offset, klass); 842 } 843 844 845 bool java_lang_Class::is_primitive(oop java_class) { 846 // should assert: 847 //assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 848 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL); 849 850 #ifdef ASSERT 851 if (is_primitive) { 852 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset)); 853 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()), 854 "Should be either the T_VOID primitive or a java primitive"); 855 } 856 #endif 857 858 return is_primitive; 859 } 860 861 862 BasicType java_lang_Class::primitive_type(oop java_class) { 863 assert(java_lang_Class::is_primitive(java_class), "just checking"); 864 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset)); 865 BasicType type = T_VOID; 866 if (ak != NULL) { 867 // Note: create_basic_type_mirror above initializes ak to a non-null value. 868 type = ArrayKlass::cast(ak)->element_type(); 869 } else { 870 assert(java_class == Universe::void_mirror(), "only valid non-array primitive"); 871 } 872 assert(Universe::java_mirror(type) == java_class, "must be consistent"); 873 return type; 874 } 875 876 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) { 877 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 878 if (is_primitive(java_class)) { 879 if (reference_klass != NULL) 880 (*reference_klass) = NULL; 881 return primitive_type(java_class); 882 } else { 883 if (reference_klass != NULL) 884 (*reference_klass) = as_Klass(java_class); 885 return T_OBJECT; 886 } 887 } 888 889 890 oop java_lang_Class::primitive_mirror(BasicType t) { 891 oop mirror = Universe::java_mirror(t); 892 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class"); 893 assert(java_lang_Class::is_primitive(mirror), "must be primitive"); 894 return mirror; 895 } 896 897 bool java_lang_Class::offsets_computed = false; 898 int java_lang_Class::classRedefinedCount_offset = -1; 899 900 void java_lang_Class::compute_offsets() { 901 assert(!offsets_computed, "offsets should be initialized only once"); 902 offsets_computed = true; 903 904 Klass* k = SystemDictionary::Class_klass(); 905 // The classRedefinedCount field is only present starting in 1.5, 906 // so don't go fatal. 907 compute_optional_offset(classRedefinedCount_offset, 908 k, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature()); 909 910 // Needs to be optional because the old build runs Queens during bootstrapping 911 // and jdk8-9 doesn't have coordinated pushes yet. 912 compute_optional_offset(_class_loader_offset, 913 k, vmSymbols::classLoader_name(), 914 vmSymbols::classloader_signature()); 915 916 compute_offset(_component_mirror_offset, 917 k, vmSymbols::componentType_name(), 918 vmSymbols::class_signature()); 919 920 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have 921 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops 922 // GC treats them the same. 923 _init_lock_offset = _component_mirror_offset; 924 925 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 926 } 927 928 int java_lang_Class::classRedefinedCount(oop the_class_mirror) { 929 if (classRedefinedCount_offset == -1) { 930 // If we don't have an offset for it then just return -1 as a marker. 931 return -1; 932 } 933 934 return the_class_mirror->int_field(classRedefinedCount_offset); 935 } 936 937 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) { 938 if (classRedefinedCount_offset == -1) { 939 // If we don't have an offset for it then nothing to set. 940 return; 941 } 942 943 the_class_mirror->int_field_put(classRedefinedCount_offset, value); 944 } 945 946 947 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the 948 // platform thread structure, and a eetop offset which was used for thread 949 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures 950 // merged, so in the HotSpot VM we just use the eetop field for the thread 951 // instead of the privateInfo_offset. 952 // 953 // Note: The stackSize field is only present starting in 1.4. 954 955 int java_lang_Thread::_name_offset = 0; 956 int java_lang_Thread::_group_offset = 0; 957 int java_lang_Thread::_contextClassLoader_offset = 0; 958 int java_lang_Thread::_inheritedAccessControlContext_offset = 0; 959 int java_lang_Thread::_priority_offset = 0; 960 int java_lang_Thread::_eetop_offset = 0; 961 int java_lang_Thread::_daemon_offset = 0; 962 int java_lang_Thread::_stillborn_offset = 0; 963 int java_lang_Thread::_stackSize_offset = 0; 964 int java_lang_Thread::_tid_offset = 0; 965 int java_lang_Thread::_thread_status_offset = 0; 966 int java_lang_Thread::_park_blocker_offset = 0; 967 int java_lang_Thread::_park_event_offset = 0 ; 968 969 970 void java_lang_Thread::compute_offsets() { 971 assert(_group_offset == 0, "offsets should be initialized only once"); 972 973 Klass* k = SystemDictionary::Thread_klass(); 974 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 975 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature()); 976 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature()); 977 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature()); 978 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature()); 979 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature()); 980 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature()); 981 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature()); 982 // The stackSize field is only present starting in 1.4, so don't go fatal. 983 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature()); 984 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal. 985 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature()); 986 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature()); 987 // The parkBlocker field is only present starting in 1.6, so don't go fatal. 988 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature()); 989 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(), 990 vmSymbols::long_signature()); 991 } 992 993 994 JavaThread* java_lang_Thread::thread(oop java_thread) { 995 return (JavaThread*)java_thread->address_field(_eetop_offset); 996 } 997 998 999 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) { 1000 java_thread->address_field_put(_eetop_offset, (address)thread); 1001 } 1002 1003 1004 oop java_lang_Thread::name(oop java_thread) { 1005 return java_thread->obj_field(_name_offset); 1006 } 1007 1008 1009 void java_lang_Thread::set_name(oop java_thread, oop name) { 1010 java_thread->obj_field_put(_name_offset, name); 1011 } 1012 1013 1014 ThreadPriority java_lang_Thread::priority(oop java_thread) { 1015 return (ThreadPriority)java_thread->int_field(_priority_offset); 1016 } 1017 1018 1019 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) { 1020 java_thread->int_field_put(_priority_offset, priority); 1021 } 1022 1023 1024 oop java_lang_Thread::threadGroup(oop java_thread) { 1025 return java_thread->obj_field(_group_offset); 1026 } 1027 1028 1029 bool java_lang_Thread::is_stillborn(oop java_thread) { 1030 return java_thread->bool_field(_stillborn_offset) != 0; 1031 } 1032 1033 1034 // We never have reason to turn the stillborn bit off 1035 void java_lang_Thread::set_stillborn(oop java_thread) { 1036 java_thread->bool_field_put(_stillborn_offset, true); 1037 } 1038 1039 1040 bool java_lang_Thread::is_alive(oop java_thread) { 1041 JavaThread* thr = java_lang_Thread::thread(java_thread); 1042 return (thr != NULL); 1043 } 1044 1045 1046 bool java_lang_Thread::is_daemon(oop java_thread) { 1047 return java_thread->bool_field(_daemon_offset) != 0; 1048 } 1049 1050 1051 void java_lang_Thread::set_daemon(oop java_thread) { 1052 java_thread->bool_field_put(_daemon_offset, true); 1053 } 1054 1055 oop java_lang_Thread::context_class_loader(oop java_thread) { 1056 return java_thread->obj_field(_contextClassLoader_offset); 1057 } 1058 1059 oop java_lang_Thread::inherited_access_control_context(oop java_thread) { 1060 return java_thread->obj_field(_inheritedAccessControlContext_offset); 1061 } 1062 1063 1064 jlong java_lang_Thread::stackSize(oop java_thread) { 1065 if (_stackSize_offset > 0) { 1066 return java_thread->long_field(_stackSize_offset); 1067 } else { 1068 return 0; 1069 } 1070 } 1071 1072 // Write the thread status value to threadStatus field in java.lang.Thread java class. 1073 void java_lang_Thread::set_thread_status(oop java_thread, 1074 java_lang_Thread::ThreadStatus status) { 1075 // The threadStatus is only present starting in 1.5 1076 if (_thread_status_offset > 0) { 1077 java_thread->int_field_put(_thread_status_offset, status); 1078 } 1079 } 1080 1081 // Read thread status value from threadStatus field in java.lang.Thread java class. 1082 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) { 1083 assert(Thread::current()->is_Watcher_thread() || Thread::current()->is_VM_thread() || 1084 JavaThread::current()->thread_state() == _thread_in_vm, 1085 "Java Thread is not running in vm"); 1086 // The threadStatus is only present starting in 1.5 1087 if (_thread_status_offset > 0) { 1088 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1089 } else { 1090 // All we can easily figure out is if it is alive, but that is 1091 // enough info for a valid unknown status. 1092 // These aren't restricted to valid set ThreadStatus values, so 1093 // use JVMTI values and cast. 1094 JavaThread* thr = java_lang_Thread::thread(java_thread); 1095 if (thr == NULL) { 1096 // the thread hasn't run yet or is in the process of exiting 1097 return NEW; 1098 } 1099 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE; 1100 } 1101 } 1102 1103 1104 jlong java_lang_Thread::thread_id(oop java_thread) { 1105 // The thread ID field is only present starting in 1.5 1106 if (_tid_offset > 0) { 1107 return java_thread->long_field(_tid_offset); 1108 } else { 1109 return 0; 1110 } 1111 } 1112 1113 oop java_lang_Thread::park_blocker(oop java_thread) { 1114 assert(JDK_Version::current().supports_thread_park_blocker() && 1115 _park_blocker_offset != 0, "Must support parkBlocker field"); 1116 1117 if (_park_blocker_offset > 0) { 1118 return java_thread->obj_field(_park_blocker_offset); 1119 } 1120 1121 return NULL; 1122 } 1123 1124 jlong java_lang_Thread::park_event(oop java_thread) { 1125 if (_park_event_offset > 0) { 1126 return java_thread->long_field(_park_event_offset); 1127 } 1128 return 0; 1129 } 1130 1131 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) { 1132 if (_park_event_offset > 0) { 1133 java_thread->long_field_put(_park_event_offset, ptr); 1134 return true; 1135 } 1136 return false; 1137 } 1138 1139 1140 const char* java_lang_Thread::thread_status_name(oop java_thread) { 1141 assert(_thread_status_offset != 0, "Must have thread status"); 1142 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1143 switch (status) { 1144 case NEW : return "NEW"; 1145 case RUNNABLE : return "RUNNABLE"; 1146 case SLEEPING : return "TIMED_WAITING (sleeping)"; 1147 case IN_OBJECT_WAIT : return "WAITING (on object monitor)"; 1148 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)"; 1149 case PARKED : return "WAITING (parking)"; 1150 case PARKED_TIMED : return "TIMED_WAITING (parking)"; 1151 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)"; 1152 case TERMINATED : return "TERMINATED"; 1153 default : return "UNKNOWN"; 1154 }; 1155 } 1156 int java_lang_ThreadGroup::_parent_offset = 0; 1157 int java_lang_ThreadGroup::_name_offset = 0; 1158 int java_lang_ThreadGroup::_threads_offset = 0; 1159 int java_lang_ThreadGroup::_groups_offset = 0; 1160 int java_lang_ThreadGroup::_maxPriority_offset = 0; 1161 int java_lang_ThreadGroup::_destroyed_offset = 0; 1162 int java_lang_ThreadGroup::_daemon_offset = 0; 1163 int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0; 1164 int java_lang_ThreadGroup::_nthreads_offset = 0; 1165 int java_lang_ThreadGroup::_ngroups_offset = 0; 1166 1167 oop java_lang_ThreadGroup::parent(oop java_thread_group) { 1168 assert(java_thread_group->is_oop(), "thread group must be oop"); 1169 return java_thread_group->obj_field(_parent_offset); 1170 } 1171 1172 // ("name as oop" accessor is not necessary) 1173 1174 typeArrayOop java_lang_ThreadGroup::name(oop java_thread_group) { 1175 oop name = java_thread_group->obj_field(_name_offset); 1176 // ThreadGroup.name can be null 1177 return name == NULL ? (typeArrayOop)NULL : java_lang_String::value(name); 1178 } 1179 1180 int java_lang_ThreadGroup::nthreads(oop java_thread_group) { 1181 assert(java_thread_group->is_oop(), "thread group must be oop"); 1182 return java_thread_group->int_field(_nthreads_offset); 1183 } 1184 1185 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) { 1186 oop threads = java_thread_group->obj_field(_threads_offset); 1187 assert(threads != NULL, "threadgroups should have threads"); 1188 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code 1189 return objArrayOop(threads); 1190 } 1191 1192 int java_lang_ThreadGroup::ngroups(oop java_thread_group) { 1193 assert(java_thread_group->is_oop(), "thread group must be oop"); 1194 return java_thread_group->int_field(_ngroups_offset); 1195 } 1196 1197 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) { 1198 oop groups = java_thread_group->obj_field(_groups_offset); 1199 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code 1200 return objArrayOop(groups); 1201 } 1202 1203 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) { 1204 assert(java_thread_group->is_oop(), "thread group must be oop"); 1205 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset); 1206 } 1207 1208 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) { 1209 assert(java_thread_group->is_oop(), "thread group must be oop"); 1210 return java_thread_group->bool_field(_destroyed_offset) != 0; 1211 } 1212 1213 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) { 1214 assert(java_thread_group->is_oop(), "thread group must be oop"); 1215 return java_thread_group->bool_field(_daemon_offset) != 0; 1216 } 1217 1218 bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) { 1219 assert(java_thread_group->is_oop(), "thread group must be oop"); 1220 return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0; 1221 } 1222 1223 void java_lang_ThreadGroup::compute_offsets() { 1224 assert(_parent_offset == 0, "offsets should be initialized only once"); 1225 1226 Klass* k = SystemDictionary::ThreadGroup_klass(); 1227 1228 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature()); 1229 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1230 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature()); 1231 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature()); 1232 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature()); 1233 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature()); 1234 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature()); 1235 compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature()); 1236 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature()); 1237 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature()); 1238 } 1239 1240 oop java_lang_Throwable::unassigned_stacktrace() { 1241 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Throwable_klass()); 1242 address addr = ik->static_field_addr(static_unassigned_stacktrace_offset); 1243 if (UseCompressedOops) { 1244 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 1245 } else { 1246 return oopDesc::load_decode_heap_oop((oop*)addr); 1247 } 1248 } 1249 1250 oop java_lang_Throwable::backtrace(oop throwable) { 1251 return throwable->obj_field_acquire(backtrace_offset); 1252 } 1253 1254 1255 void java_lang_Throwable::set_backtrace(oop throwable, oop value) { 1256 throwable->release_obj_field_put(backtrace_offset, value); 1257 } 1258 1259 1260 oop java_lang_Throwable::message(oop throwable) { 1261 return throwable->obj_field(detailMessage_offset); 1262 } 1263 1264 1265 oop java_lang_Throwable::message(Handle throwable) { 1266 return throwable->obj_field(detailMessage_offset); 1267 } 1268 1269 1270 // Return Symbol for detailed_message or NULL 1271 Symbol* java_lang_Throwable::detail_message(oop throwable) { 1272 PRESERVE_EXCEPTION_MARK; // Keep original exception 1273 oop detailed_message = java_lang_Throwable::message(throwable); 1274 if (detailed_message != NULL) { 1275 return java_lang_String::as_symbol(detailed_message, THREAD); 1276 } 1277 return NULL; 1278 } 1279 1280 void java_lang_Throwable::set_message(oop throwable, oop value) { 1281 throwable->obj_field_put(detailMessage_offset, value); 1282 } 1283 1284 1285 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) { 1286 throwable->obj_field_put(stackTrace_offset, st_element_array); 1287 } 1288 1289 void java_lang_Throwable::clear_stacktrace(oop throwable) { 1290 set_stacktrace(throwable, NULL); 1291 } 1292 1293 1294 void java_lang_Throwable::print(oop throwable, outputStream* st) { 1295 ResourceMark rm; 1296 Klass* k = throwable->klass(); 1297 assert(k != NULL, "just checking"); 1298 st->print("%s", InstanceKlass::cast(k)->external_name()); 1299 oop msg = message(throwable); 1300 if (msg != NULL) { 1301 st->print(": %s", java_lang_String::as_utf8_string(msg)); 1302 } 1303 } 1304 1305 1306 void java_lang_Throwable::print(Handle throwable, outputStream* st) { 1307 ResourceMark rm; 1308 Klass* k = throwable->klass(); 1309 assert(k != NULL, "just checking"); 1310 st->print("%s", InstanceKlass::cast(k)->external_name()); 1311 oop msg = message(throwable); 1312 if (msg != NULL) { 1313 st->print(": %s", java_lang_String::as_utf8_string(msg)); 1314 } 1315 } 1316 1317 // After this many redefines, the stack trace is unreliable. 1318 const int MAX_VERSION = USHRT_MAX; 1319 1320 // Helper backtrace functions to store bci|version together. 1321 static inline int merge_bci_and_version(int bci, int version) { 1322 // only store u2 for version, checking for overflow. 1323 if (version > USHRT_MAX || version < 0) version = MAX_VERSION; 1324 assert((jushort)bci == bci, "bci should be short"); 1325 return build_int_from_shorts(version, bci); 1326 } 1327 1328 static inline int bci_at(unsigned int merged) { 1329 return extract_high_short_from_int(merged); 1330 } 1331 static inline int version_at(unsigned int merged) { 1332 return extract_low_short_from_int(merged); 1333 } 1334 1335 static inline bool version_matches(Method* method, int version) { 1336 assert(version < MAX_VERSION, "version is too big"); 1337 return method != NULL && (method->constants()->version() == version); 1338 } 1339 1340 static inline int get_line_number(Method* method, int bci) { 1341 int line_number = 0; 1342 if (method->is_native()) { 1343 // Negative value different from -1 below, enabling Java code in 1344 // class java.lang.StackTraceElement to distinguish "native" from 1345 // "no LineNumberTable". JDK tests for -2. 1346 line_number = -2; 1347 } else { 1348 // Returns -1 if no LineNumberTable, and otherwise actual line number 1349 line_number = method->line_number_from_bci(bci); 1350 if (line_number == -1 && ShowHiddenFrames) { 1351 line_number = bci + 1000000; 1352 } 1353 } 1354 return line_number; 1355 } 1356 1357 // This class provides a simple wrapper over the internal structure of 1358 // exception backtrace to insulate users of the backtrace from needing 1359 // to know what it looks like. 1360 class BacktraceBuilder: public StackObj { 1361 private: 1362 Handle _backtrace; 1363 objArrayOop _head; 1364 typeArrayOop _methods; 1365 typeArrayOop _bcis; 1366 objArrayOop _mirrors; 1367 typeArrayOop _cprefs; // needed to insulate method name against redefinition 1368 int _index; 1369 No_Safepoint_Verifier _nsv; 1370 1371 public: 1372 1373 enum { 1374 trace_methods_offset = java_lang_Throwable::trace_methods_offset, 1375 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset, 1376 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset, 1377 trace_cprefs_offset = java_lang_Throwable::trace_cprefs_offset, 1378 trace_next_offset = java_lang_Throwable::trace_next_offset, 1379 trace_size = java_lang_Throwable::trace_size, 1380 trace_chunk_size = java_lang_Throwable::trace_chunk_size 1381 }; 1382 1383 // get info out of chunks 1384 static typeArrayOop get_methods(objArrayHandle chunk) { 1385 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset)); 1386 assert(methods != NULL, "method array should be initialized in backtrace"); 1387 return methods; 1388 } 1389 static typeArrayOop get_bcis(objArrayHandle chunk) { 1390 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 1391 assert(bcis != NULL, "bci array should be initialized in backtrace"); 1392 return bcis; 1393 } 1394 static objArrayOop get_mirrors(objArrayHandle chunk) { 1395 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset)); 1396 assert(mirrors != NULL, "mirror array should be initialized in backtrace"); 1397 return mirrors; 1398 } 1399 static typeArrayOop get_cprefs(objArrayHandle chunk) { 1400 typeArrayOop cprefs = typeArrayOop(chunk->obj_at(trace_cprefs_offset)); 1401 assert(cprefs != NULL, "cprefs array should be initialized in backtrace"); 1402 return cprefs; 1403 } 1404 1405 // constructor for new backtrace 1406 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL), _cprefs(NULL) { 1407 expand(CHECK); 1408 _backtrace = _head; 1409 _index = 0; 1410 } 1411 1412 BacktraceBuilder(objArrayHandle backtrace) { 1413 _methods = get_methods(backtrace); 1414 _bcis = get_bcis(backtrace); 1415 _mirrors = get_mirrors(backtrace); 1416 _cprefs = get_cprefs(backtrace); 1417 assert(_methods->length() == _bcis->length() && 1418 _methods->length() == _mirrors->length(), 1419 "method and source information arrays should match"); 1420 1421 // head is the preallocated backtrace 1422 _backtrace = _head = backtrace(); 1423 _index = 0; 1424 } 1425 1426 void expand(TRAPS) { 1427 objArrayHandle old_head(THREAD, _head); 1428 Pause_No_Safepoint_Verifier pnsv(&_nsv); 1429 1430 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK); 1431 objArrayHandle new_head(THREAD, head); 1432 1433 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK); 1434 typeArrayHandle new_methods(THREAD, methods); 1435 1436 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK); 1437 typeArrayHandle new_bcis(THREAD, bcis); 1438 1439 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK); 1440 objArrayHandle new_mirrors(THREAD, mirrors); 1441 1442 typeArrayOop cprefs = oopFactory::new_shortArray(trace_chunk_size, CHECK); 1443 typeArrayHandle new_cprefs(THREAD, cprefs); 1444 1445 if (!old_head.is_null()) { 1446 old_head->obj_at_put(trace_next_offset, new_head()); 1447 } 1448 new_head->obj_at_put(trace_methods_offset, new_methods()); 1449 new_head->obj_at_put(trace_bcis_offset, new_bcis()); 1450 new_head->obj_at_put(trace_mirrors_offset, new_mirrors()); 1451 new_head->obj_at_put(trace_cprefs_offset, new_cprefs()); 1452 1453 _head = new_head(); 1454 _methods = new_methods(); 1455 _bcis = new_bcis(); 1456 _mirrors = new_mirrors(); 1457 _cprefs = new_cprefs(); 1458 _index = 0; 1459 } 1460 1461 oop backtrace() { 1462 return _backtrace(); 1463 } 1464 1465 inline void push(Method* method, int bci, TRAPS) { 1466 // Smear the -1 bci to 0 since the array only holds unsigned 1467 // shorts. The later line number lookup would just smear the -1 1468 // to a 0 even if it could be recorded. 1469 if (bci == SynchronizationEntryBCI) bci = 0; 1470 1471 if (_index >= trace_chunk_size) { 1472 methodHandle mhandle(THREAD, method); 1473 expand(CHECK); 1474 method = mhandle(); 1475 } 1476 1477 _methods->short_at_put(_index, method->orig_method_idnum()); 1478 _bcis->int_at_put(_index, merge_bci_and_version(bci, method->constants()->version())); 1479 _cprefs->short_at_put(_index, method->name_index()); 1480 1481 // We need to save the mirrors in the backtrace to keep the class 1482 // from being unloaded while we still have this stack trace. 1483 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror"); 1484 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror()); 1485 _index++; 1486 } 1487 1488 }; 1489 1490 Symbol* get_source_file_name(InstanceKlass* holder, int version) { 1491 // Find the specific ik version that contains this source_file_name_index 1492 // via the previous versions list, but use the current version's 1493 // constant pool to look it up. The previous version's index has been 1494 // merged for the current constant pool. 1495 InstanceKlass* ik = holder->get_klass_version(version); 1496 // This version has been cleaned up. 1497 if (ik == NULL) return NULL; 1498 int source_file_name_index = ik->source_file_name_index(); 1499 return (source_file_name_index == 0) ? 1500 (Symbol*)NULL : holder->constants()->symbol_at(source_file_name_index); 1501 } 1502 1503 // Print stack trace element to resource allocated buffer 1504 char* java_lang_Throwable::print_stack_element_to_buffer(Handle mirror, 1505 int method_id, int version, int bci, int cpref) { 1506 1507 // Get strings and string lengths 1508 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 1509 const char* klass_name = holder->external_name(); 1510 int buf_len = (int)strlen(klass_name); 1511 1512 Method* method = holder->method_with_orig_idnum(method_id, version); 1513 1514 // The method can be NULL if the requested class version is gone 1515 Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref); 1516 char* method_name = sym->as_C_string(); 1517 buf_len += (int)strlen(method_name); 1518 1519 char* source_file_name = NULL; 1520 Symbol* source = get_source_file_name(holder, version); 1521 if (source != NULL) { 1522 source_file_name = source->as_C_string(); 1523 buf_len += (int)strlen(source_file_name); 1524 } 1525 1526 // Allocate temporary buffer with extra space for formatting and line number 1527 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64); 1528 1529 // Print stack trace line in buffer 1530 sprintf(buf, "\tat %s.%s", klass_name, method_name); 1531 1532 if (!version_matches(method, version)) { 1533 strcat(buf, "(Redefined)"); 1534 } else { 1535 int line_number = get_line_number(method, bci); 1536 if (line_number == -2) { 1537 strcat(buf, "(Native Method)"); 1538 } else { 1539 if (source_file_name != NULL && (line_number != -1)) { 1540 // Sourcename and linenumber 1541 sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number); 1542 } else if (source_file_name != NULL) { 1543 // Just sourcename 1544 sprintf(buf + (int)strlen(buf), "(%s)", source_file_name); 1545 } else { 1546 // Neither sourcename nor linenumber 1547 sprintf(buf + (int)strlen(buf), "(Unknown Source)"); 1548 } 1549 nmethod* nm = method->code(); 1550 if (WizardMode && nm != NULL) { 1551 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm); 1552 } 1553 } 1554 } 1555 1556 return buf; 1557 } 1558 1559 void java_lang_Throwable::print_stack_element(outputStream *st, Handle mirror, 1560 int method_id, int version, int bci, int cpref) { 1561 ResourceMark rm; 1562 char* buf = print_stack_element_to_buffer(mirror, method_id, version, bci, cpref); 1563 st->print_cr("%s", buf); 1564 } 1565 1566 void java_lang_Throwable::print_stack_element(outputStream *st, methodHandle method, int bci) { 1567 Handle mirror = method->method_holder()->java_mirror(); 1568 int method_id = method->orig_method_idnum(); 1569 int version = method->constants()->version(); 1570 int cpref = method->name_index(); 1571 print_stack_element(st, mirror, method_id, version, bci, cpref); 1572 } 1573 1574 const char* java_lang_Throwable::no_stack_trace_message() { 1575 return "\t<<no stack trace available>>"; 1576 } 1577 1578 1579 // Currently used only for exceptions occurring during startup 1580 void java_lang_Throwable::print_stack_trace(oop throwable, outputStream* st) { 1581 Thread *THREAD = Thread::current(); 1582 Handle h_throwable(THREAD, throwable); 1583 while (h_throwable.not_null()) { 1584 objArrayHandle result (THREAD, objArrayOop(backtrace(h_throwable()))); 1585 if (result.is_null()) { 1586 st->print_raw_cr(no_stack_trace_message()); 1587 return; 1588 } 1589 1590 while (result.not_null()) { 1591 1592 // Get method id, bci, version and mirror from chunk 1593 typeArrayHandle methods (THREAD, BacktraceBuilder::get_methods(result)); 1594 typeArrayHandle bcis (THREAD, BacktraceBuilder::get_bcis(result)); 1595 objArrayHandle mirrors (THREAD, BacktraceBuilder::get_mirrors(result)); 1596 typeArrayHandle cprefs (THREAD, BacktraceBuilder::get_cprefs(result)); 1597 1598 int length = methods()->length(); 1599 for (int index = 0; index < length; index++) { 1600 Handle mirror(THREAD, mirrors->obj_at(index)); 1601 // NULL mirror means end of stack trace 1602 if (mirror.is_null()) goto handle_cause; 1603 int method = methods->short_at(index); 1604 int version = version_at(bcis->int_at(index)); 1605 int bci = bci_at(bcis->int_at(index)); 1606 int cpref = cprefs->short_at(index); 1607 print_stack_element(st, mirror, method, version, bci, cpref); 1608 } 1609 result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset))); 1610 } 1611 handle_cause: 1612 { 1613 EXCEPTION_MARK; 1614 JavaValue cause(T_OBJECT); 1615 JavaCalls::call_virtual(&cause, 1616 h_throwable, 1617 KlassHandle(THREAD, h_throwable->klass()), 1618 vmSymbols::getCause_name(), 1619 vmSymbols::void_throwable_signature(), 1620 THREAD); 1621 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 1622 if (HAS_PENDING_EXCEPTION) { 1623 CLEAR_PENDING_EXCEPTION; 1624 h_throwable = Handle(); 1625 } else { 1626 h_throwable = Handle(THREAD, (oop) cause.get_jobject()); 1627 if (h_throwable.not_null()) { 1628 st->print("Caused by: "); 1629 print(h_throwable, st); 1630 st->cr(); 1631 } 1632 } 1633 } 1634 } 1635 } 1636 1637 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS) { 1638 if (!StackTraceInThrowable) return; 1639 ResourceMark rm(THREAD); 1640 1641 // Start out by clearing the backtrace for this object, in case the VM 1642 // runs out of memory while allocating the stack trace 1643 set_backtrace(throwable(), NULL); 1644 // Clear lazily constructed Java level stacktrace if refilling occurs 1645 // This is unnecessary in 1.7+ but harmless 1646 clear_stacktrace(throwable()); 1647 1648 int max_depth = MaxJavaStackTraceDepth; 1649 JavaThread* thread = (JavaThread*)THREAD; 1650 BacktraceBuilder bt(CHECK); 1651 1652 // If there is no Java frame just return the method that was being called 1653 // with bci 0 1654 if (!thread->has_last_Java_frame()) { 1655 if (max_depth >= 1 && method() != NULL) { 1656 bt.push(method(), 0, CHECK); 1657 set_backtrace(throwable(), bt.backtrace()); 1658 } 1659 return; 1660 } 1661 1662 // Instead of using vframe directly, this version of fill_in_stack_trace 1663 // basically handles everything by hand. This significantly improved the 1664 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows. 1665 // See bug 6333838 for more details. 1666 // The "ASSERT" here is to verify this method generates the exactly same stack 1667 // trace as utilizing vframe. 1668 #ifdef ASSERT 1669 vframeStream st(thread); 1670 methodHandle st_method(THREAD, st.method()); 1671 #endif 1672 int total_count = 0; 1673 RegisterMap map(thread, false); 1674 int decode_offset = 0; 1675 nmethod* nm = NULL; 1676 bool skip_fillInStackTrace_check = false; 1677 bool skip_throwableInit_check = false; 1678 bool skip_hidden = !ShowHiddenFrames; 1679 1680 for (frame fr = thread->last_frame(); max_depth != total_count;) { 1681 Method* method = NULL; 1682 int bci = 0; 1683 1684 // Compiled java method case. 1685 if (decode_offset != 0) { 1686 DebugInfoReadStream stream(nm, decode_offset); 1687 decode_offset = stream.read_int(); 1688 method = (Method*)nm->metadata_at(stream.read_int()); 1689 bci = stream.read_bci(); 1690 } else { 1691 if (fr.is_first_frame()) break; 1692 address pc = fr.pc(); 1693 if (fr.is_interpreted_frame()) { 1694 address bcp = fr.interpreter_frame_bcp(); 1695 method = fr.interpreter_frame_method(); 1696 bci = method->bci_from(bcp); 1697 fr = fr.sender(&map); 1698 } else { 1699 CodeBlob* cb = fr.cb(); 1700 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL 1701 // but non nmethod 1702 fr = fr.sender(&map); 1703 if (cb == NULL || !cb->is_nmethod()) { 1704 continue; 1705 } 1706 nm = (nmethod*)cb; 1707 if (nm->method()->is_native()) { 1708 method = nm->method(); 1709 bci = 0; 1710 } else { 1711 PcDesc* pd = nm->pc_desc_at(pc); 1712 decode_offset = pd->scope_decode_offset(); 1713 // if decode_offset is not equal to 0, it will execute the 1714 // "compiled java method case" at the beginning of the loop. 1715 continue; 1716 } 1717 } 1718 } 1719 #ifdef ASSERT 1720 assert(st_method() == method && st.bci() == bci, 1721 "Wrong stack trace"); 1722 st.next(); 1723 // vframeStream::method isn't GC-safe so store off a copy 1724 // of the Method* in case we GC. 1725 if (!st.at_end()) { 1726 st_method = st.method(); 1727 } 1728 #endif 1729 1730 // the format of the stacktrace will be: 1731 // - 1 or more fillInStackTrace frames for the exception class (skipped) 1732 // - 0 or more <init> methods for the exception class (skipped) 1733 // - rest of the stack 1734 1735 if (!skip_fillInStackTrace_check) { 1736 if (method->name() == vmSymbols::fillInStackTrace_name() && 1737 throwable->is_a(method->method_holder())) { 1738 continue; 1739 } 1740 else { 1741 skip_fillInStackTrace_check = true; // gone past them all 1742 } 1743 } 1744 if (!skip_throwableInit_check) { 1745 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering"); 1746 1747 // skip <init> methods of the exception class and superclasses 1748 // This is simlar to classic VM. 1749 if (method->name() == vmSymbols::object_initializer_name() && 1750 throwable->is_a(method->method_holder())) { 1751 continue; 1752 } else { 1753 // there are none or we've seen them all - either way stop checking 1754 skip_throwableInit_check = true; 1755 } 1756 } 1757 if (method->is_hidden()) { 1758 if (skip_hidden) continue; 1759 } 1760 bt.push(method, bci, CHECK); 1761 total_count++; 1762 } 1763 1764 // Put completed stack trace into throwable object 1765 set_backtrace(throwable(), bt.backtrace()); 1766 } 1767 1768 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method) { 1769 // No-op if stack trace is disabled 1770 if (!StackTraceInThrowable) { 1771 return; 1772 } 1773 1774 // Disable stack traces for some preallocated out of memory errors 1775 if (!Universe::should_fill_in_stack_trace(throwable)) { 1776 return; 1777 } 1778 1779 PRESERVE_EXCEPTION_MARK; 1780 1781 JavaThread* thread = JavaThread::active(); 1782 fill_in_stack_trace(throwable, method, thread); 1783 // ignore exceptions thrown during stack trace filling 1784 CLEAR_PENDING_EXCEPTION; 1785 } 1786 1787 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 1788 // Allocate stack trace - backtrace is created but not filled in 1789 1790 // No-op if stack trace is disabled 1791 if (!StackTraceInThrowable) return; 1792 BacktraceBuilder bt(CHECK); // creates a backtrace 1793 set_backtrace(throwable(), bt.backtrace()); 1794 } 1795 1796 1797 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 1798 // Fill in stack trace into preallocated backtrace (no GC) 1799 1800 // No-op if stack trace is disabled 1801 if (!StackTraceInThrowable) return; 1802 1803 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check"); 1804 1805 JavaThread* THREAD = JavaThread::current(); 1806 1807 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable())); 1808 assert(backtrace.not_null(), "backtrace should have been preallocated"); 1809 1810 ResourceMark rm(THREAD); 1811 vframeStream st(THREAD); 1812 1813 BacktraceBuilder bt(backtrace); 1814 1815 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 1816 // methods as preallocated errors aren't created by "java" code. 1817 1818 // fill in as much stack trace as possible 1819 typeArrayOop methods = BacktraceBuilder::get_methods(backtrace); 1820 int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth); 1821 int chunk_count = 0; 1822 1823 for (;!st.at_end(); st.next()) { 1824 bt.push(st.method(), st.bci(), CHECK); 1825 chunk_count++; 1826 1827 // Bail-out for deep stacks 1828 if (chunk_count >= max_chunks) break; 1829 } 1830 1831 // We support the Throwable immutability protocol defined for Java 7. 1832 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace()); 1833 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized"); 1834 } 1835 1836 1837 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) { 1838 if (throwable == NULL) { 1839 THROW_0(vmSymbols::java_lang_NullPointerException()); 1840 } 1841 objArrayOop chunk = objArrayOop(backtrace(throwable)); 1842 int depth = 0; 1843 if (chunk != NULL) { 1844 // Iterate over chunks and count full ones 1845 while (true) { 1846 objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset)); 1847 if (next == NULL) break; 1848 depth += trace_chunk_size; 1849 chunk = next; 1850 } 1851 assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check"); 1852 // Count element in remaining partial chunk. NULL value for mirror 1853 // marks the end of the stack trace elements that are saved. 1854 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk); 1855 assert(mirrors != NULL, "sanity check"); 1856 for (int i = 0; i < mirrors->length(); i++) { 1857 if (mirrors->obj_at(i) == NULL) break; 1858 depth++; 1859 } 1860 } 1861 return depth; 1862 } 1863 1864 1865 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) { 1866 if (throwable == NULL) { 1867 THROW_0(vmSymbols::java_lang_NullPointerException()); 1868 } 1869 if (index < 0) { 1870 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 1871 } 1872 // Compute how many chunks to skip and index into actual chunk 1873 objArrayOop chunk = objArrayOop(backtrace(throwable)); 1874 int skip_chunks = index / trace_chunk_size; 1875 int chunk_index = index % trace_chunk_size; 1876 while (chunk != NULL && skip_chunks > 0) { 1877 chunk = objArrayOop(chunk->obj_at(trace_next_offset)); 1878 skip_chunks--; 1879 } 1880 if (chunk == NULL) { 1881 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 1882 } 1883 // Get method id, bci, version, mirror and cpref from chunk 1884 typeArrayOop methods = BacktraceBuilder::get_methods(chunk); 1885 typeArrayOop bcis = BacktraceBuilder::get_bcis(chunk); 1886 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk); 1887 typeArrayOop cprefs = BacktraceBuilder::get_cprefs(chunk); 1888 1889 assert(methods != NULL && bcis != NULL && mirrors != NULL, "sanity check"); 1890 1891 int method = methods->short_at(chunk_index); 1892 int version = version_at(bcis->int_at(chunk_index)); 1893 int bci = bci_at(bcis->int_at(chunk_index)); 1894 int cpref = cprefs->short_at(chunk_index); 1895 Handle mirror(THREAD, mirrors->obj_at(chunk_index)); 1896 1897 // Chunk can be partial full 1898 if (mirror.is_null()) { 1899 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 1900 } 1901 oop element = java_lang_StackTraceElement::create(mirror, method, version, bci, cpref, CHECK_0); 1902 return element; 1903 } 1904 1905 oop java_lang_StackTraceElement::create(Handle mirror, int method_id, 1906 int version, int bci, int cpref, TRAPS) { 1907 // Allocate java.lang.StackTraceElement instance 1908 Klass* k = SystemDictionary::StackTraceElement_klass(); 1909 assert(k != NULL, "must be loaded in 1.4+"); 1910 instanceKlassHandle ik (THREAD, k); 1911 if (ik->should_be_initialized()) { 1912 ik->initialize(CHECK_0); 1913 } 1914 1915 Handle element = ik->allocate_instance_handle(CHECK_0); 1916 // Fill in class name 1917 ResourceMark rm(THREAD); 1918 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 1919 const char* str = holder->external_name(); 1920 oop classname = StringTable::intern((char*) str, CHECK_0); 1921 java_lang_StackTraceElement::set_declaringClass(element(), classname); 1922 1923 Method* method = holder->method_with_orig_idnum(method_id, version); 1924 1925 // The method can be NULL if the requested class version is gone 1926 Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref); 1927 1928 // Fill in method name 1929 oop methodname = StringTable::intern(sym, CHECK_0); 1930 java_lang_StackTraceElement::set_methodName(element(), methodname); 1931 1932 if (!version_matches(method, version)) { 1933 // The method was redefined, accurate line number information isn't available 1934 java_lang_StackTraceElement::set_fileName(element(), NULL); 1935 java_lang_StackTraceElement::set_lineNumber(element(), -1); 1936 } else { 1937 // Fill in source file name and line number. 1938 Symbol* source = get_source_file_name(holder, version); 1939 if (ShowHiddenFrames && source == NULL) 1940 source = vmSymbols::unknown_class_name(); 1941 oop filename = StringTable::intern(source, CHECK_0); 1942 java_lang_StackTraceElement::set_fileName(element(), filename); 1943 1944 int line_number = get_line_number(method, bci); 1945 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 1946 } 1947 return element(); 1948 } 1949 1950 oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) { 1951 Handle mirror (THREAD, method->method_holder()->java_mirror()); 1952 int method_id = method->orig_method_idnum(); 1953 int cpref = method->name_index(); 1954 return create(mirror, method_id, method->constants()->version(), bci, cpref, THREAD); 1955 } 1956 1957 void java_lang_reflect_AccessibleObject::compute_offsets() { 1958 Klass* k = SystemDictionary::reflect_AccessibleObject_klass(); 1959 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature()); 1960 } 1961 1962 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 1963 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1964 return (jboolean) reflect->bool_field(override_offset); 1965 } 1966 1967 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 1968 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1969 reflect->bool_field_put(override_offset, (int) value); 1970 } 1971 1972 void java_lang_reflect_Method::compute_offsets() { 1973 Klass* k = SystemDictionary::reflect_Method_klass(); 1974 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 1975 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1976 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature()); 1977 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 1978 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 1979 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 1980 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 1981 // The generic signature and annotations fields are only present in 1.5 1982 signature_offset = -1; 1983 annotations_offset = -1; 1984 parameter_annotations_offset = -1; 1985 annotation_default_offset = -1; 1986 type_annotations_offset = -1; 1987 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 1988 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 1989 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 1990 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature()); 1991 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 1992 } 1993 1994 Handle java_lang_reflect_Method::create(TRAPS) { 1995 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1996 Klass* klass = SystemDictionary::reflect_Method_klass(); 1997 // This class is eagerly initialized during VM initialization, since we keep a refence 1998 // to one of the methods 1999 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized"); 2000 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD); 2001 } 2002 2003 oop java_lang_reflect_Method::clazz(oop reflect) { 2004 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2005 return reflect->obj_field(clazz_offset); 2006 } 2007 2008 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 2009 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2010 reflect->obj_field_put(clazz_offset, value); 2011 } 2012 2013 int java_lang_reflect_Method::slot(oop reflect) { 2014 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2015 return reflect->int_field(slot_offset); 2016 } 2017 2018 void java_lang_reflect_Method::set_slot(oop reflect, int value) { 2019 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2020 reflect->int_field_put(slot_offset, value); 2021 } 2022 2023 oop java_lang_reflect_Method::name(oop method) { 2024 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2025 return method->obj_field(name_offset); 2026 } 2027 2028 void java_lang_reflect_Method::set_name(oop method, oop value) { 2029 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2030 method->obj_field_put(name_offset, value); 2031 } 2032 2033 oop java_lang_reflect_Method::return_type(oop method) { 2034 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2035 return method->obj_field(returnType_offset); 2036 } 2037 2038 void java_lang_reflect_Method::set_return_type(oop method, oop value) { 2039 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2040 method->obj_field_put(returnType_offset, value); 2041 } 2042 2043 oop java_lang_reflect_Method::parameter_types(oop method) { 2044 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2045 return method->obj_field(parameterTypes_offset); 2046 } 2047 2048 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 2049 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2050 method->obj_field_put(parameterTypes_offset, value); 2051 } 2052 2053 oop java_lang_reflect_Method::exception_types(oop method) { 2054 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2055 return method->obj_field(exceptionTypes_offset); 2056 } 2057 2058 void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 2059 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2060 method->obj_field_put(exceptionTypes_offset, value); 2061 } 2062 2063 int java_lang_reflect_Method::modifiers(oop method) { 2064 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2065 return method->int_field(modifiers_offset); 2066 } 2067 2068 void java_lang_reflect_Method::set_modifiers(oop method, int value) { 2069 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2070 method->int_field_put(modifiers_offset, value); 2071 } 2072 2073 bool java_lang_reflect_Method::has_signature_field() { 2074 return (signature_offset >= 0); 2075 } 2076 2077 oop java_lang_reflect_Method::signature(oop method) { 2078 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2079 assert(has_signature_field(), "signature field must be present"); 2080 return method->obj_field(signature_offset); 2081 } 2082 2083 void java_lang_reflect_Method::set_signature(oop method, oop value) { 2084 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2085 assert(has_signature_field(), "signature field must be present"); 2086 method->obj_field_put(signature_offset, value); 2087 } 2088 2089 bool java_lang_reflect_Method::has_annotations_field() { 2090 return (annotations_offset >= 0); 2091 } 2092 2093 oop java_lang_reflect_Method::annotations(oop method) { 2094 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2095 assert(has_annotations_field(), "annotations field must be present"); 2096 return method->obj_field(annotations_offset); 2097 } 2098 2099 void java_lang_reflect_Method::set_annotations(oop method, oop value) { 2100 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2101 assert(has_annotations_field(), "annotations field must be present"); 2102 method->obj_field_put(annotations_offset, value); 2103 } 2104 2105 bool java_lang_reflect_Method::has_parameter_annotations_field() { 2106 return (parameter_annotations_offset >= 0); 2107 } 2108 2109 oop java_lang_reflect_Method::parameter_annotations(oop method) { 2110 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2111 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2112 return method->obj_field(parameter_annotations_offset); 2113 } 2114 2115 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 2116 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2117 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2118 method->obj_field_put(parameter_annotations_offset, value); 2119 } 2120 2121 bool java_lang_reflect_Method::has_annotation_default_field() { 2122 return (annotation_default_offset >= 0); 2123 } 2124 2125 oop java_lang_reflect_Method::annotation_default(oop method) { 2126 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2127 assert(has_annotation_default_field(), "annotation default field must be present"); 2128 return method->obj_field(annotation_default_offset); 2129 } 2130 2131 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 2132 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2133 assert(has_annotation_default_field(), "annotation default field must be present"); 2134 method->obj_field_put(annotation_default_offset, value); 2135 } 2136 2137 bool java_lang_reflect_Method::has_type_annotations_field() { 2138 return (type_annotations_offset >= 0); 2139 } 2140 2141 oop java_lang_reflect_Method::type_annotations(oop method) { 2142 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2143 assert(has_type_annotations_field(), "type_annotations field must be present"); 2144 return method->obj_field(type_annotations_offset); 2145 } 2146 2147 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) { 2148 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2149 assert(has_type_annotations_field(), "type_annotations field must be present"); 2150 method->obj_field_put(type_annotations_offset, value); 2151 } 2152 2153 void java_lang_reflect_Constructor::compute_offsets() { 2154 Klass* k = SystemDictionary::reflect_Constructor_klass(); 2155 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2156 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 2157 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 2158 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 2159 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2160 // The generic signature and annotations fields are only present in 1.5 2161 signature_offset = -1; 2162 annotations_offset = -1; 2163 parameter_annotations_offset = -1; 2164 type_annotations_offset = -1; 2165 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 2166 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 2167 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 2168 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 2169 } 2170 2171 Handle java_lang_reflect_Constructor::create(TRAPS) { 2172 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2173 Symbol* name = vmSymbols::java_lang_reflect_Constructor(); 2174 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2175 instanceKlassHandle klass (THREAD, k); 2176 // Ensure it is initialized 2177 klass->initialize(CHECK_NH); 2178 return klass->allocate_instance_handle(THREAD); 2179 } 2180 2181 oop java_lang_reflect_Constructor::clazz(oop reflect) { 2182 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2183 return reflect->obj_field(clazz_offset); 2184 } 2185 2186 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 2187 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2188 reflect->obj_field_put(clazz_offset, value); 2189 } 2190 2191 oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 2192 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2193 return constructor->obj_field(parameterTypes_offset); 2194 } 2195 2196 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 2197 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2198 constructor->obj_field_put(parameterTypes_offset, value); 2199 } 2200 2201 oop java_lang_reflect_Constructor::exception_types(oop constructor) { 2202 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2203 return constructor->obj_field(exceptionTypes_offset); 2204 } 2205 2206 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 2207 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2208 constructor->obj_field_put(exceptionTypes_offset, value); 2209 } 2210 2211 int java_lang_reflect_Constructor::slot(oop reflect) { 2212 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2213 return reflect->int_field(slot_offset); 2214 } 2215 2216 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 2217 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2218 reflect->int_field_put(slot_offset, value); 2219 } 2220 2221 int java_lang_reflect_Constructor::modifiers(oop constructor) { 2222 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2223 return constructor->int_field(modifiers_offset); 2224 } 2225 2226 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 2227 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2228 constructor->int_field_put(modifiers_offset, value); 2229 } 2230 2231 bool java_lang_reflect_Constructor::has_signature_field() { 2232 return (signature_offset >= 0); 2233 } 2234 2235 oop java_lang_reflect_Constructor::signature(oop constructor) { 2236 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2237 assert(has_signature_field(), "signature field must be present"); 2238 return constructor->obj_field(signature_offset); 2239 } 2240 2241 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 2242 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2243 assert(has_signature_field(), "signature field must be present"); 2244 constructor->obj_field_put(signature_offset, value); 2245 } 2246 2247 bool java_lang_reflect_Constructor::has_annotations_field() { 2248 return (annotations_offset >= 0); 2249 } 2250 2251 oop java_lang_reflect_Constructor::annotations(oop constructor) { 2252 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2253 assert(has_annotations_field(), "annotations field must be present"); 2254 return constructor->obj_field(annotations_offset); 2255 } 2256 2257 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 2258 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2259 assert(has_annotations_field(), "annotations field must be present"); 2260 constructor->obj_field_put(annotations_offset, value); 2261 } 2262 2263 bool java_lang_reflect_Constructor::has_parameter_annotations_field() { 2264 return (parameter_annotations_offset >= 0); 2265 } 2266 2267 oop java_lang_reflect_Constructor::parameter_annotations(oop method) { 2268 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2269 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2270 return method->obj_field(parameter_annotations_offset); 2271 } 2272 2273 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 2274 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2275 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2276 method->obj_field_put(parameter_annotations_offset, value); 2277 } 2278 2279 bool java_lang_reflect_Constructor::has_type_annotations_field() { 2280 return (type_annotations_offset >= 0); 2281 } 2282 2283 oop java_lang_reflect_Constructor::type_annotations(oop constructor) { 2284 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2285 assert(has_type_annotations_field(), "type_annotations field must be present"); 2286 return constructor->obj_field(type_annotations_offset); 2287 } 2288 2289 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) { 2290 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2291 assert(has_type_annotations_field(), "type_annotations field must be present"); 2292 constructor->obj_field_put(type_annotations_offset, value); 2293 } 2294 2295 void java_lang_reflect_Field::compute_offsets() { 2296 Klass* k = SystemDictionary::reflect_Field_klass(); 2297 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2298 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2299 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature()); 2300 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 2301 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2302 // The generic signature and annotations fields are only present in 1.5 2303 signature_offset = -1; 2304 annotations_offset = -1; 2305 type_annotations_offset = -1; 2306 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 2307 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 2308 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 2309 } 2310 2311 Handle java_lang_reflect_Field::create(TRAPS) { 2312 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2313 Symbol* name = vmSymbols::java_lang_reflect_Field(); 2314 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2315 instanceKlassHandle klass (THREAD, k); 2316 // Ensure it is initialized 2317 klass->initialize(CHECK_NH); 2318 return klass->allocate_instance_handle(THREAD); 2319 } 2320 2321 oop java_lang_reflect_Field::clazz(oop reflect) { 2322 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2323 return reflect->obj_field(clazz_offset); 2324 } 2325 2326 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 2327 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2328 reflect->obj_field_put(clazz_offset, value); 2329 } 2330 2331 oop java_lang_reflect_Field::name(oop field) { 2332 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2333 return field->obj_field(name_offset); 2334 } 2335 2336 void java_lang_reflect_Field::set_name(oop field, oop value) { 2337 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2338 field->obj_field_put(name_offset, value); 2339 } 2340 2341 oop java_lang_reflect_Field::type(oop field) { 2342 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2343 return field->obj_field(type_offset); 2344 } 2345 2346 void java_lang_reflect_Field::set_type(oop field, oop value) { 2347 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2348 field->obj_field_put(type_offset, value); 2349 } 2350 2351 int java_lang_reflect_Field::slot(oop reflect) { 2352 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2353 return reflect->int_field(slot_offset); 2354 } 2355 2356 void java_lang_reflect_Field::set_slot(oop reflect, int value) { 2357 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2358 reflect->int_field_put(slot_offset, value); 2359 } 2360 2361 int java_lang_reflect_Field::modifiers(oop field) { 2362 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2363 return field->int_field(modifiers_offset); 2364 } 2365 2366 void java_lang_reflect_Field::set_modifiers(oop field, int value) { 2367 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2368 field->int_field_put(modifiers_offset, value); 2369 } 2370 2371 bool java_lang_reflect_Field::has_signature_field() { 2372 return (signature_offset >= 0); 2373 } 2374 2375 oop java_lang_reflect_Field::signature(oop field) { 2376 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2377 assert(has_signature_field(), "signature field must be present"); 2378 return field->obj_field(signature_offset); 2379 } 2380 2381 void java_lang_reflect_Field::set_signature(oop field, oop value) { 2382 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2383 assert(has_signature_field(), "signature field must be present"); 2384 field->obj_field_put(signature_offset, value); 2385 } 2386 2387 bool java_lang_reflect_Field::has_annotations_field() { 2388 return (annotations_offset >= 0); 2389 } 2390 2391 oop java_lang_reflect_Field::annotations(oop field) { 2392 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2393 assert(has_annotations_field(), "annotations field must be present"); 2394 return field->obj_field(annotations_offset); 2395 } 2396 2397 void java_lang_reflect_Field::set_annotations(oop field, oop value) { 2398 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2399 assert(has_annotations_field(), "annotations field must be present"); 2400 field->obj_field_put(annotations_offset, value); 2401 } 2402 2403 bool java_lang_reflect_Field::has_type_annotations_field() { 2404 return (type_annotations_offset >= 0); 2405 } 2406 2407 oop java_lang_reflect_Field::type_annotations(oop field) { 2408 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2409 assert(has_type_annotations_field(), "type_annotations field must be present"); 2410 return field->obj_field(type_annotations_offset); 2411 } 2412 2413 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) { 2414 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2415 assert(has_type_annotations_field(), "type_annotations field must be present"); 2416 field->obj_field_put(type_annotations_offset, value); 2417 } 2418 2419 void sun_reflect_ConstantPool::compute_offsets() { 2420 Klass* k = SystemDictionary::reflect_ConstantPool_klass(); 2421 // This null test can be removed post beta 2422 if (k != NULL) { 2423 // The field is called ConstantPool* in the sun.reflect.ConstantPool class. 2424 compute_offset(_oop_offset, k, vmSymbols::ConstantPool_name(), vmSymbols::object_signature()); 2425 } 2426 } 2427 2428 void java_lang_reflect_Parameter::compute_offsets() { 2429 Klass* k = SystemDictionary::reflect_Parameter_klass(); 2430 if(NULL != k) { 2431 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2432 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2433 compute_offset(index_offset, k, vmSymbols::index_name(), vmSymbols::int_signature()); 2434 compute_offset(executable_offset, k, vmSymbols::executable_name(), vmSymbols::executable_signature()); 2435 } 2436 } 2437 2438 Handle java_lang_reflect_Parameter::create(TRAPS) { 2439 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2440 Symbol* name = vmSymbols::java_lang_reflect_Parameter(); 2441 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2442 instanceKlassHandle klass (THREAD, k); 2443 // Ensure it is initialized 2444 klass->initialize(CHECK_NH); 2445 return klass->allocate_instance_handle(THREAD); 2446 } 2447 2448 oop java_lang_reflect_Parameter::name(oop param) { 2449 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2450 return param->obj_field(name_offset); 2451 } 2452 2453 void java_lang_reflect_Parameter::set_name(oop param, oop value) { 2454 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2455 param->obj_field_put(name_offset, value); 2456 } 2457 2458 int java_lang_reflect_Parameter::modifiers(oop param) { 2459 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2460 return param->int_field(modifiers_offset); 2461 } 2462 2463 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) { 2464 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2465 param->int_field_put(modifiers_offset, value); 2466 } 2467 2468 int java_lang_reflect_Parameter::index(oop param) { 2469 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2470 return param->int_field(index_offset); 2471 } 2472 2473 void java_lang_reflect_Parameter::set_index(oop param, int value) { 2474 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2475 param->int_field_put(index_offset, value); 2476 } 2477 2478 oop java_lang_reflect_Parameter::executable(oop param) { 2479 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2480 return param->obj_field(executable_offset); 2481 } 2482 2483 void java_lang_reflect_Parameter::set_executable(oop param, oop value) { 2484 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2485 param->obj_field_put(executable_offset, value); 2486 } 2487 2488 2489 Handle sun_reflect_ConstantPool::create(TRAPS) { 2490 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2491 Klass* k = SystemDictionary::reflect_ConstantPool_klass(); 2492 instanceKlassHandle klass (THREAD, k); 2493 // Ensure it is initialized 2494 klass->initialize(CHECK_NH); 2495 return klass->allocate_instance_handle(THREAD); 2496 } 2497 2498 2499 void sun_reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) { 2500 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2501 oop mirror = value->pool_holder()->java_mirror(); 2502 // Save the mirror to get back the constant pool. 2503 reflect->obj_field_put(_oop_offset, mirror); 2504 } 2505 2506 ConstantPool* sun_reflect_ConstantPool::get_cp(oop reflect) { 2507 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2508 2509 oop mirror = reflect->obj_field(_oop_offset); 2510 Klass* k = java_lang_Class::as_Klass(mirror); 2511 assert(k->oop_is_instance(), "Must be"); 2512 2513 // Get the constant pool back from the klass. Since class redefinition 2514 // merges the new constant pool into the old, this is essentially the 2515 // same constant pool as the original. If constant pool merging is 2516 // no longer done in the future, this will have to change to save 2517 // the original. 2518 return InstanceKlass::cast(k)->constants(); 2519 } 2520 2521 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() { 2522 Klass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass(); 2523 // This null test can be removed post beta 2524 if (k != NULL) { 2525 compute_offset(_base_offset, k, 2526 vmSymbols::base_name(), vmSymbols::object_signature()); 2527 } 2528 } 2529 2530 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 2531 Klass* k = SystemDictionary::box_klass(type); 2532 if (k == NULL) return NULL; 2533 instanceKlassHandle h (THREAD, k); 2534 if (!h->is_initialized()) h->initialize(CHECK_0); 2535 return h->allocate_instance(THREAD); 2536 } 2537 2538 2539 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 2540 oop box = initialize_and_allocate(type, CHECK_0); 2541 if (box == NULL) return NULL; 2542 switch (type) { 2543 case T_BOOLEAN: 2544 box->bool_field_put(value_offset, value->z); 2545 break; 2546 case T_CHAR: 2547 box->char_field_put(value_offset, value->c); 2548 break; 2549 case T_FLOAT: 2550 box->float_field_put(value_offset, value->f); 2551 break; 2552 case T_DOUBLE: 2553 box->double_field_put(long_value_offset, value->d); 2554 break; 2555 case T_BYTE: 2556 box->byte_field_put(value_offset, value->b); 2557 break; 2558 case T_SHORT: 2559 box->short_field_put(value_offset, value->s); 2560 break; 2561 case T_INT: 2562 box->int_field_put(value_offset, value->i); 2563 break; 2564 case T_LONG: 2565 box->long_field_put(long_value_offset, value->j); 2566 break; 2567 default: 2568 return NULL; 2569 } 2570 return box; 2571 } 2572 2573 2574 BasicType java_lang_boxing_object::basic_type(oop box) { 2575 if (box == NULL) return T_ILLEGAL; 2576 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2577 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 2578 return T_ILLEGAL; 2579 return type; 2580 } 2581 2582 2583 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 2584 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2585 switch (type) { 2586 case T_BOOLEAN: 2587 value->z = box->bool_field(value_offset); 2588 break; 2589 case T_CHAR: 2590 value->c = box->char_field(value_offset); 2591 break; 2592 case T_FLOAT: 2593 value->f = box->float_field(value_offset); 2594 break; 2595 case T_DOUBLE: 2596 value->d = box->double_field(long_value_offset); 2597 break; 2598 case T_BYTE: 2599 value->b = box->byte_field(value_offset); 2600 break; 2601 case T_SHORT: 2602 value->s = box->short_field(value_offset); 2603 break; 2604 case T_INT: 2605 value->i = box->int_field(value_offset); 2606 break; 2607 case T_LONG: 2608 value->j = box->long_field(long_value_offset); 2609 break; 2610 default: 2611 return T_ILLEGAL; 2612 } // end switch 2613 return type; 2614 } 2615 2616 2617 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 2618 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2619 switch (type) { 2620 case T_BOOLEAN: 2621 box->bool_field_put(value_offset, value->z); 2622 break; 2623 case T_CHAR: 2624 box->char_field_put(value_offset, value->c); 2625 break; 2626 case T_FLOAT: 2627 box->float_field_put(value_offset, value->f); 2628 break; 2629 case T_DOUBLE: 2630 box->double_field_put(long_value_offset, value->d); 2631 break; 2632 case T_BYTE: 2633 box->byte_field_put(value_offset, value->b); 2634 break; 2635 case T_SHORT: 2636 box->short_field_put(value_offset, value->s); 2637 break; 2638 case T_INT: 2639 box->int_field_put(value_offset, value->i); 2640 break; 2641 case T_LONG: 2642 box->long_field_put(long_value_offset, value->j); 2643 break; 2644 default: 2645 return T_ILLEGAL; 2646 } // end switch 2647 return type; 2648 } 2649 2650 2651 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) { 2652 switch (type) { 2653 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break; 2654 case T_CHAR: st->print("%d", value->c); break; 2655 case T_BYTE: st->print("%d", value->b); break; 2656 case T_SHORT: st->print("%d", value->s); break; 2657 case T_INT: st->print("%d", value->i); break; 2658 case T_LONG: st->print(INT64_FORMAT, value->j); break; 2659 case T_FLOAT: st->print("%f", value->f); break; 2660 case T_DOUBLE: st->print("%lf", value->d); break; 2661 default: st->print("type %d?", type); break; 2662 } 2663 } 2664 2665 2666 // Support for java_lang_ref_Reference 2667 HeapWord *java_lang_ref_Reference::pending_list_lock_addr() { 2668 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass()); 2669 address addr = ik->static_field_addr(static_lock_offset); 2670 return (HeapWord*) addr; 2671 } 2672 2673 oop java_lang_ref_Reference::pending_list_lock() { 2674 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass()); 2675 address addr = ik->static_field_addr(static_lock_offset); 2676 if (UseCompressedOops) { 2677 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 2678 } else { 2679 return oopDesc::load_decode_heap_oop((oop*)addr); 2680 } 2681 } 2682 2683 HeapWord *java_lang_ref_Reference::pending_list_addr() { 2684 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass()); 2685 address addr = ik->static_field_addr(static_pending_offset); 2686 // XXX This might not be HeapWord aligned, almost rather be char *. 2687 return (HeapWord*)addr; 2688 } 2689 2690 oop java_lang_ref_Reference::pending_list() { 2691 char *addr = (char *)pending_list_addr(); 2692 if (UseCompressedOops) { 2693 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 2694 } else { 2695 return oopDesc::load_decode_heap_oop((oop*)addr); 2696 } 2697 } 2698 2699 2700 // Support for java_lang_ref_SoftReference 2701 2702 jlong java_lang_ref_SoftReference::timestamp(oop ref) { 2703 return ref->long_field(timestamp_offset); 2704 } 2705 2706 jlong java_lang_ref_SoftReference::clock() { 2707 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass()); 2708 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset); 2709 return *offset; 2710 } 2711 2712 void java_lang_ref_SoftReference::set_clock(jlong value) { 2713 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass()); 2714 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset); 2715 *offset = value; 2716 } 2717 2718 // Support for java_lang_invoke_DirectMethodHandle 2719 2720 int java_lang_invoke_DirectMethodHandle::_member_offset; 2721 2722 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) { 2723 oop member_name = NULL; 2724 bool is_dmh = dmh->is_oop() && java_lang_invoke_DirectMethodHandle::is_instance(dmh); 2725 assert(is_dmh, "a DirectMethodHandle oop is expected"); 2726 if (is_dmh) { 2727 member_name = dmh->obj_field(member_offset_in_bytes()); 2728 } 2729 return member_name; 2730 } 2731 2732 void java_lang_invoke_DirectMethodHandle::compute_offsets() { 2733 Klass* klass_oop = SystemDictionary::DirectMethodHandle_klass(); 2734 if (klass_oop != NULL) { 2735 compute_offset(_member_offset, klass_oop, vmSymbols::member_name(), vmSymbols::java_lang_invoke_MemberName_signature()); 2736 } 2737 } 2738 2739 // Support for java_lang_invoke_MethodHandle 2740 2741 int java_lang_invoke_MethodHandle::_type_offset; 2742 int java_lang_invoke_MethodHandle::_form_offset; 2743 2744 int java_lang_invoke_MemberName::_clazz_offset; 2745 int java_lang_invoke_MemberName::_name_offset; 2746 int java_lang_invoke_MemberName::_type_offset; 2747 int java_lang_invoke_MemberName::_flags_offset; 2748 int java_lang_invoke_MemberName::_vmtarget_offset; 2749 int java_lang_invoke_MemberName::_vmloader_offset; 2750 int java_lang_invoke_MemberName::_vmindex_offset; 2751 2752 int java_lang_invoke_LambdaForm::_vmentry_offset; 2753 2754 void java_lang_invoke_MethodHandle::compute_offsets() { 2755 Klass* klass_oop = SystemDictionary::MethodHandle_klass(); 2756 if (klass_oop != NULL) { 2757 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature()); 2758 compute_offset(_form_offset, klass_oop, vmSymbols::form_name(), vmSymbols::java_lang_invoke_LambdaForm_signature()); 2759 } 2760 } 2761 2762 void java_lang_invoke_MemberName::compute_offsets() { 2763 Klass* klass_oop = SystemDictionary::MemberName_klass(); 2764 if (klass_oop != NULL) { 2765 compute_offset(_clazz_offset, klass_oop, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2766 compute_offset(_name_offset, klass_oop, vmSymbols::name_name(), vmSymbols::string_signature()); 2767 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::object_signature()); 2768 compute_offset(_flags_offset, klass_oop, vmSymbols::flags_name(), vmSymbols::int_signature()); 2769 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 2770 } 2771 } 2772 2773 void java_lang_invoke_LambdaForm::compute_offsets() { 2774 Klass* klass_oop = SystemDictionary::LambdaForm_klass(); 2775 if (klass_oop != NULL) { 2776 compute_offset(_vmentry_offset, klass_oop, vmSymbols::vmentry_name(), vmSymbols::java_lang_invoke_MemberName_signature()); 2777 } 2778 } 2779 2780 bool java_lang_invoke_LambdaForm::is_instance(oop obj) { 2781 return obj != NULL && is_subclass(obj->klass()); 2782 } 2783 2784 2785 oop java_lang_invoke_MethodHandle::type(oop mh) { 2786 return mh->obj_field(_type_offset); 2787 } 2788 2789 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) { 2790 mh->obj_field_put(_type_offset, mtype); 2791 } 2792 2793 oop java_lang_invoke_MethodHandle::form(oop mh) { 2794 assert(_form_offset != 0, ""); 2795 return mh->obj_field(_form_offset); 2796 } 2797 2798 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) { 2799 assert(_form_offset != 0, ""); 2800 mh->obj_field_put(_form_offset, lform); 2801 } 2802 2803 /// MemberName accessors 2804 2805 oop java_lang_invoke_MemberName::clazz(oop mname) { 2806 assert(is_instance(mname), "wrong type"); 2807 return mname->obj_field(_clazz_offset); 2808 } 2809 2810 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) { 2811 assert(is_instance(mname), "wrong type"); 2812 mname->obj_field_put(_clazz_offset, clazz); 2813 } 2814 2815 oop java_lang_invoke_MemberName::name(oop mname) { 2816 assert(is_instance(mname), "wrong type"); 2817 return mname->obj_field(_name_offset); 2818 } 2819 2820 void java_lang_invoke_MemberName::set_name(oop mname, oop name) { 2821 assert(is_instance(mname), "wrong type"); 2822 mname->obj_field_put(_name_offset, name); 2823 } 2824 2825 oop java_lang_invoke_MemberName::type(oop mname) { 2826 assert(is_instance(mname), "wrong type"); 2827 return mname->obj_field(_type_offset); 2828 } 2829 2830 void java_lang_invoke_MemberName::set_type(oop mname, oop type) { 2831 assert(is_instance(mname), "wrong type"); 2832 mname->obj_field_put(_type_offset, type); 2833 } 2834 2835 int java_lang_invoke_MemberName::flags(oop mname) { 2836 assert(is_instance(mname), "wrong type"); 2837 return mname->int_field(_flags_offset); 2838 } 2839 2840 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) { 2841 assert(is_instance(mname), "wrong type"); 2842 mname->int_field_put(_flags_offset, flags); 2843 } 2844 2845 Metadata* java_lang_invoke_MemberName::vmtarget(oop mname) { 2846 assert(is_instance(mname), "wrong type"); 2847 return (Metadata*)mname->address_field(_vmtarget_offset); 2848 } 2849 2850 bool java_lang_invoke_MemberName::is_method(oop mname) { 2851 assert(is_instance(mname), "must be MemberName"); 2852 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0; 2853 } 2854 2855 void java_lang_invoke_MemberName::set_vmtarget(oop mname, Metadata* ref) { 2856 assert(is_instance(mname), "wrong type"); 2857 // check the type of the vmtarget 2858 oop dependency = NULL; 2859 if (ref != NULL) { 2860 switch (flags(mname) & (MN_IS_METHOD | 2861 MN_IS_CONSTRUCTOR | 2862 MN_IS_FIELD)) { 2863 case MN_IS_METHOD: 2864 case MN_IS_CONSTRUCTOR: 2865 assert(ref->is_method(), "should be a method"); 2866 dependency = ((Method*)ref)->method_holder()->java_mirror(); 2867 break; 2868 case MN_IS_FIELD: 2869 assert(ref->is_klass(), "should be a class"); 2870 dependency = ((Klass*)ref)->java_mirror(); 2871 break; 2872 default: 2873 ShouldNotReachHere(); 2874 } 2875 } 2876 mname->address_field_put(_vmtarget_offset, (address)ref); 2877 // Add a reference to the loader (actually mirror because anonymous classes will not have 2878 // distinct loaders) to ensure the metadata is kept alive 2879 // This mirror may be different than the one in clazz field. 2880 mname->obj_field_put(_vmloader_offset, dependency); 2881 } 2882 2883 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) { 2884 assert(is_instance(mname), "wrong type"); 2885 return (intptr_t) mname->address_field(_vmindex_offset); 2886 } 2887 2888 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) { 2889 assert(is_instance(mname), "wrong type"); 2890 mname->address_field_put(_vmindex_offset, (address) index); 2891 } 2892 2893 oop java_lang_invoke_LambdaForm::vmentry(oop lform) { 2894 assert(is_instance(lform), "wrong type"); 2895 return lform->obj_field(_vmentry_offset); 2896 } 2897 2898 2899 // Support for java_lang_invoke_MethodType 2900 2901 int java_lang_invoke_MethodType::_rtype_offset; 2902 int java_lang_invoke_MethodType::_ptypes_offset; 2903 2904 void java_lang_invoke_MethodType::compute_offsets() { 2905 Klass* k = SystemDictionary::MethodType_klass(); 2906 if (k != NULL) { 2907 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature()); 2908 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature()); 2909 } 2910 } 2911 2912 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) { 2913 st->print("("); 2914 objArrayOop pts = ptypes(mt); 2915 for (int i = 0, limit = pts->length(); i < limit; i++) { 2916 java_lang_Class::print_signature(pts->obj_at(i), st); 2917 } 2918 st->print(")"); 2919 java_lang_Class::print_signature(rtype(mt), st); 2920 } 2921 2922 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) { 2923 ResourceMark rm; 2924 stringStream buffer(128); 2925 print_signature(mt, &buffer); 2926 const char* sigstr = buffer.base(); 2927 int siglen = (int) buffer.size(); 2928 Symbol *name; 2929 if (!intern_if_not_found) { 2930 name = SymbolTable::probe(sigstr, siglen); 2931 } else { 2932 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 2933 } 2934 return name; 2935 } 2936 2937 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) { 2938 if (mt1 == mt2) 2939 return true; 2940 if (rtype(mt1) != rtype(mt2)) 2941 return false; 2942 if (ptype_count(mt1) != ptype_count(mt2)) 2943 return false; 2944 for (int i = ptype_count(mt1) - 1; i >= 0; i--) { 2945 if (ptype(mt1, i) != ptype(mt2, i)) 2946 return false; 2947 } 2948 return true; 2949 } 2950 2951 oop java_lang_invoke_MethodType::rtype(oop mt) { 2952 assert(is_instance(mt), "must be a MethodType"); 2953 return mt->obj_field(_rtype_offset); 2954 } 2955 2956 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) { 2957 assert(is_instance(mt), "must be a MethodType"); 2958 return (objArrayOop) mt->obj_field(_ptypes_offset); 2959 } 2960 2961 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) { 2962 return ptypes(mt)->obj_at(idx); 2963 } 2964 2965 int java_lang_invoke_MethodType::ptype_count(oop mt) { 2966 return ptypes(mt)->length(); 2967 } 2968 2969 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) { 2970 objArrayOop pts = ptypes(mt); 2971 int count = pts->length(); 2972 int slots = 0; 2973 for (int i = 0; i < count; i++) { 2974 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i)); 2975 slots += type2size[bt]; 2976 } 2977 return slots; 2978 } 2979 2980 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) { 2981 BasicType bt = java_lang_Class::as_BasicType(rtype(mt)); 2982 return type2size[bt]; 2983 } 2984 2985 2986 // Support for java_lang_invoke_CallSite 2987 2988 int java_lang_invoke_CallSite::_target_offset; 2989 int java_lang_invoke_CallSite::_context_offset; 2990 2991 void java_lang_invoke_CallSite::compute_offsets() { 2992 Klass* k = SystemDictionary::CallSite_klass(); 2993 if (k != NULL) { 2994 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature()); 2995 compute_offset(_context_offset, k, vmSymbols::context_name(), 2996 vmSymbols::java_lang_invoke_MethodHandleNatives_CallSiteContext_signature()); 2997 } 2998 } 2999 3000 oop java_lang_invoke_CallSite::context(oop call_site) { 3001 assert(java_lang_invoke_CallSite::is_instance(call_site), ""); 3002 3003 oop dep_oop = call_site->obj_field(_context_offset); 3004 return dep_oop; 3005 } 3006 3007 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext 3008 3009 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset; 3010 3011 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() { 3012 Klass* k = SystemDictionary::Context_klass(); 3013 if (k != NULL) { 3014 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3015 } 3016 } 3017 3018 nmethodBucket* java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) { 3019 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), ""); 3020 return (nmethodBucket*) (address) call_site->long_field(_vmdependencies_offset); 3021 } 3022 3023 void java_lang_invoke_MethodHandleNatives_CallSiteContext::set_vmdependencies(oop call_site, nmethodBucket* context) { 3024 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), ""); 3025 call_site->long_field_put(_vmdependencies_offset, (jlong) (address) context); 3026 } 3027 3028 // Support for java_security_AccessControlContext 3029 3030 int java_security_AccessControlContext::_context_offset = 0; 3031 int java_security_AccessControlContext::_privilegedContext_offset = 0; 3032 int java_security_AccessControlContext::_isPrivileged_offset = 0; 3033 int java_security_AccessControlContext::_isAuthorized_offset = -1; 3034 3035 void java_security_AccessControlContext::compute_offsets() { 3036 assert(_isPrivileged_offset == 0, "offsets should be initialized only once"); 3037 fieldDescriptor fd; 3038 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass()); 3039 3040 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) { 3041 fatal("Invalid layout of java.security.AccessControlContext"); 3042 } 3043 _context_offset = fd.offset(); 3044 3045 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) { 3046 fatal("Invalid layout of java.security.AccessControlContext"); 3047 } 3048 _privilegedContext_offset = fd.offset(); 3049 3050 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) { 3051 fatal("Invalid layout of java.security.AccessControlContext"); 3052 } 3053 _isPrivileged_offset = fd.offset(); 3054 3055 // The offset may not be present for bootstrapping with older JDK. 3056 if (ik->find_local_field(vmSymbols::isAuthorized_name(), vmSymbols::bool_signature(), &fd)) { 3057 _isAuthorized_offset = fd.offset(); 3058 } 3059 } 3060 3061 3062 bool java_security_AccessControlContext::is_authorized(Handle context) { 3063 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type"); 3064 assert(_isAuthorized_offset != -1, "should be set"); 3065 return context->bool_field(_isAuthorized_offset) != 0; 3066 } 3067 3068 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) { 3069 assert(_isPrivileged_offset != 0, "offsets should have been initialized"); 3070 // Ensure klass is initialized 3071 InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->initialize(CHECK_0); 3072 // Allocate result 3073 oop result = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->allocate_instance(CHECK_0); 3074 // Fill in values 3075 result->obj_field_put(_context_offset, context()); 3076 result->obj_field_put(_privilegedContext_offset, privileged_context()); 3077 result->bool_field_put(_isPrivileged_offset, isPrivileged); 3078 // whitelist AccessControlContexts created by the JVM if present 3079 if (_isAuthorized_offset != -1) { 3080 result->bool_field_put(_isAuthorized_offset, true); 3081 } 3082 return result; 3083 } 3084 3085 3086 // Support for java_lang_ClassLoader 3087 3088 bool java_lang_ClassLoader::offsets_computed = false; 3089 int java_lang_ClassLoader::_loader_data_offset = -1; 3090 int java_lang_ClassLoader::parallelCapable_offset = -1; 3091 3092 ClassLoaderData** java_lang_ClassLoader::loader_data_addr(oop loader) { 3093 assert(loader != NULL && loader->is_oop(), "loader must be oop"); 3094 return (ClassLoaderData**) loader->address_field_addr(_loader_data_offset); 3095 } 3096 3097 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) { 3098 return *java_lang_ClassLoader::loader_data_addr(loader); 3099 } 3100 3101 void java_lang_ClassLoader::compute_offsets() { 3102 assert(!offsets_computed, "offsets should be initialized only once"); 3103 offsets_computed = true; 3104 3105 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7, 3106 Klass* k1 = SystemDictionary::ClassLoader_klass(); 3107 compute_optional_offset(parallelCapable_offset, 3108 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature()); 3109 3110 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3111 } 3112 3113 oop java_lang_ClassLoader::parent(oop loader) { 3114 assert(is_instance(loader), "loader must be oop"); 3115 return loader->obj_field(parent_offset); 3116 } 3117 3118 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) { 3119 assert(is_instance(loader), "loader must be oop"); 3120 assert(cl == NULL || is_instance(cl), "cl argument must be oop"); 3121 oop acl = loader; 3122 debug_only(jint loop_count = 0); 3123 // This loop taken verbatim from ClassLoader.java: 3124 do { 3125 acl = parent(acl); 3126 if (cl == acl) { 3127 return true; 3128 } 3129 assert(++loop_count > 0, "loop_count overflow"); 3130 } while (acl != NULL); 3131 return false; 3132 } 3133 3134 bool java_lang_ClassLoader::is_instance(oop obj) { 3135 return obj != NULL && is_subclass(obj->klass()); 3136 } 3137 3138 3139 // For class loader classes, parallelCapable defined 3140 // based on non-null field 3141 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it 3142 bool java_lang_ClassLoader::parallelCapable(oop class_loader) { 3143 if (parallelCapable_offset == -1) { 3144 // Default for backward compatibility is false 3145 return false; 3146 } 3147 return (class_loader->obj_field(parallelCapable_offset) != NULL); 3148 } 3149 3150 bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 3151 // Fix for 4474172; see evaluation for more details 3152 loader = non_reflection_class_loader(loader); 3153 3154 oop cl = SystemDictionary::java_system_loader(); 3155 while(cl != NULL) { 3156 if (cl == loader) return true; 3157 cl = parent(cl); 3158 } 3159 return false; 3160 } 3161 3162 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) { 3163 if (loader != NULL) { 3164 // See whether this is one of the class loaders associated with 3165 // the generated bytecodes for reflection, and if so, "magically" 3166 // delegate to its parent to prevent class loading from occurring 3167 // in places where applications using reflection didn't expect it. 3168 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass(); 3169 // This might be null in non-1.4 JDKs 3170 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) { 3171 return parent(loader); 3172 } 3173 } 3174 return loader; 3175 } 3176 3177 3178 // Support for java_lang_System 3179 int java_lang_System::in_offset_in_bytes() { 3180 return (InstanceMirrorKlass::offset_of_static_fields() + static_in_offset); 3181 } 3182 3183 3184 int java_lang_System::out_offset_in_bytes() { 3185 return (InstanceMirrorKlass::offset_of_static_fields() + static_out_offset); 3186 } 3187 3188 3189 int java_lang_System::err_offset_in_bytes() { 3190 return (InstanceMirrorKlass::offset_of_static_fields() + static_err_offset); 3191 } 3192 3193 3194 bool java_lang_System::has_security_manager() { 3195 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::System_klass()); 3196 address addr = ik->static_field_addr(static_security_offset); 3197 if (UseCompressedOops) { 3198 return oopDesc::load_decode_heap_oop((narrowOop *)addr) != NULL; 3199 } else { 3200 return oopDesc::load_decode_heap_oop((oop*)addr) != NULL; 3201 } 3202 } 3203 3204 int java_lang_Class::_klass_offset; 3205 int java_lang_Class::_array_klass_offset; 3206 int java_lang_Class::_oop_size_offset; 3207 int java_lang_Class::_static_oop_field_count_offset; 3208 int java_lang_Class::_class_loader_offset; 3209 int java_lang_Class::_protection_domain_offset; 3210 int java_lang_Class::_component_mirror_offset; 3211 int java_lang_Class::_init_lock_offset; 3212 int java_lang_Class::_signers_offset; 3213 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL; 3214 int java_lang_Throwable::backtrace_offset; 3215 int java_lang_Throwable::detailMessage_offset; 3216 int java_lang_Throwable::cause_offset; 3217 int java_lang_Throwable::stackTrace_offset; 3218 int java_lang_Throwable::static_unassigned_stacktrace_offset; 3219 int java_lang_reflect_AccessibleObject::override_offset; 3220 int java_lang_reflect_Method::clazz_offset; 3221 int java_lang_reflect_Method::name_offset; 3222 int java_lang_reflect_Method::returnType_offset; 3223 int java_lang_reflect_Method::parameterTypes_offset; 3224 int java_lang_reflect_Method::exceptionTypes_offset; 3225 int java_lang_reflect_Method::slot_offset; 3226 int java_lang_reflect_Method::modifiers_offset; 3227 int java_lang_reflect_Method::signature_offset; 3228 int java_lang_reflect_Method::annotations_offset; 3229 int java_lang_reflect_Method::parameter_annotations_offset; 3230 int java_lang_reflect_Method::annotation_default_offset; 3231 int java_lang_reflect_Method::type_annotations_offset; 3232 int java_lang_reflect_Constructor::clazz_offset; 3233 int java_lang_reflect_Constructor::parameterTypes_offset; 3234 int java_lang_reflect_Constructor::exceptionTypes_offset; 3235 int java_lang_reflect_Constructor::slot_offset; 3236 int java_lang_reflect_Constructor::modifiers_offset; 3237 int java_lang_reflect_Constructor::signature_offset; 3238 int java_lang_reflect_Constructor::annotations_offset; 3239 int java_lang_reflect_Constructor::parameter_annotations_offset; 3240 int java_lang_reflect_Constructor::type_annotations_offset; 3241 int java_lang_reflect_Field::clazz_offset; 3242 int java_lang_reflect_Field::name_offset; 3243 int java_lang_reflect_Field::type_offset; 3244 int java_lang_reflect_Field::slot_offset; 3245 int java_lang_reflect_Field::modifiers_offset; 3246 int java_lang_reflect_Field::signature_offset; 3247 int java_lang_reflect_Field::annotations_offset; 3248 int java_lang_reflect_Field::type_annotations_offset; 3249 int java_lang_reflect_Parameter::name_offset; 3250 int java_lang_reflect_Parameter::modifiers_offset; 3251 int java_lang_reflect_Parameter::index_offset; 3252 int java_lang_reflect_Parameter::executable_offset; 3253 int java_lang_boxing_object::value_offset; 3254 int java_lang_boxing_object::long_value_offset; 3255 int java_lang_ref_Reference::referent_offset; 3256 int java_lang_ref_Reference::queue_offset; 3257 int java_lang_ref_Reference::next_offset; 3258 int java_lang_ref_Reference::discovered_offset; 3259 int java_lang_ref_Reference::static_lock_offset; 3260 int java_lang_ref_Reference::static_pending_offset; 3261 int java_lang_ref_Reference::number_of_fake_oop_fields; 3262 int java_lang_ref_SoftReference::timestamp_offset; 3263 int java_lang_ref_SoftReference::static_clock_offset; 3264 int java_lang_ClassLoader::parent_offset; 3265 int java_lang_System::static_in_offset; 3266 int java_lang_System::static_out_offset; 3267 int java_lang_System::static_err_offset; 3268 int java_lang_System::static_security_offset; 3269 int java_lang_StackTraceElement::declaringClass_offset; 3270 int java_lang_StackTraceElement::methodName_offset; 3271 int java_lang_StackTraceElement::fileName_offset; 3272 int java_lang_StackTraceElement::lineNumber_offset; 3273 int java_lang_AssertionStatusDirectives::classes_offset; 3274 int java_lang_AssertionStatusDirectives::classEnabled_offset; 3275 int java_lang_AssertionStatusDirectives::packages_offset; 3276 int java_lang_AssertionStatusDirectives::packageEnabled_offset; 3277 int java_lang_AssertionStatusDirectives::deflt_offset; 3278 int java_nio_Buffer::_limit_offset; 3279 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0; 3280 int sun_reflect_ConstantPool::_oop_offset; 3281 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset; 3282 3283 3284 // Support for java_lang_StackTraceElement 3285 3286 void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 3287 element->obj_field_put(fileName_offset, value); 3288 } 3289 3290 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 3291 element->obj_field_put(declaringClass_offset, value); 3292 } 3293 3294 void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 3295 element->obj_field_put(methodName_offset, value); 3296 } 3297 3298 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 3299 element->int_field_put(lineNumber_offset, value); 3300 } 3301 3302 3303 // Support for java Assertions - java_lang_AssertionStatusDirectives. 3304 3305 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 3306 o->obj_field_put(classes_offset, val); 3307 } 3308 3309 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 3310 o->obj_field_put(classEnabled_offset, val); 3311 } 3312 3313 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 3314 o->obj_field_put(packages_offset, val); 3315 } 3316 3317 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 3318 o->obj_field_put(packageEnabled_offset, val); 3319 } 3320 3321 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 3322 o->bool_field_put(deflt_offset, val); 3323 } 3324 3325 3326 // Support for intrinsification of java.nio.Buffer.checkIndex 3327 int java_nio_Buffer::limit_offset() { 3328 return _limit_offset; 3329 } 3330 3331 3332 void java_nio_Buffer::compute_offsets() { 3333 Klass* k = SystemDictionary::nio_Buffer_klass(); 3334 assert(k != NULL, "must be loaded in 1.4+"); 3335 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature()); 3336 } 3337 3338 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) { 3339 if (_owner_offset != 0) return; 3340 3341 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK); 3342 Klass* k = SystemDictionary::abstract_ownable_synchronizer_klass(); 3343 compute_offset(_owner_offset, k, 3344 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature()); 3345 } 3346 3347 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 3348 assert(_owner_offset != 0, "Must be initialized"); 3349 return obj->obj_field(_owner_offset); 3350 } 3351 3352 // Compute hard-coded offsets 3353 // Invoked before SystemDictionary::initialize, so pre-loaded classes 3354 // are not available to determine the offset_of_static_fields. 3355 void JavaClasses::compute_hard_coded_offsets() { 3356 const int x = heapOopSize; 3357 const int header = instanceOopDesc::base_offset_in_bytes(); 3358 3359 // Throwable Class 3360 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header; 3361 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header; 3362 java_lang_Throwable::cause_offset = java_lang_Throwable::hc_cause_offset * x + header; 3363 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header; 3364 java_lang_Throwable::static_unassigned_stacktrace_offset = java_lang_Throwable::hc_static_unassigned_stacktrace_offset * x; 3365 3366 // java_lang_boxing_object 3367 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header; 3368 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong); 3369 3370 // java_lang_ref_Reference: 3371 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header; 3372 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header; 3373 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header; 3374 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header; 3375 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x; 3376 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x; 3377 // Artificial fields for java_lang_ref_Reference 3378 // The first field is for the discovered field added in 1.4 3379 java_lang_ref_Reference::number_of_fake_oop_fields = 1; 3380 3381 // java_lang_ref_SoftReference Class 3382 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong); 3383 // Don't multiply static fields because they are always in wordSize units 3384 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x; 3385 3386 // java_lang_ClassLoader 3387 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header; 3388 3389 // java_lang_System 3390 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x; 3391 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x; 3392 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x; 3393 java_lang_System::static_security_offset = java_lang_System::hc_static_security_offset * x; 3394 3395 // java_lang_StackTraceElement 3396 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header; 3397 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header; 3398 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header; 3399 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header; 3400 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header; 3401 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header; 3402 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header; 3403 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header; 3404 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header; 3405 3406 } 3407 3408 3409 // Compute non-hard-coded field offsets of all the classes in this file 3410 void JavaClasses::compute_offsets() { 3411 // java_lang_Class::compute_offsets was called earlier in bootstrap 3412 java_lang_ClassLoader::compute_offsets(); 3413 java_lang_Thread::compute_offsets(); 3414 java_lang_ThreadGroup::compute_offsets(); 3415 java_lang_invoke_MethodHandle::compute_offsets(); 3416 java_lang_invoke_DirectMethodHandle::compute_offsets(); 3417 java_lang_invoke_MemberName::compute_offsets(); 3418 java_lang_invoke_LambdaForm::compute_offsets(); 3419 java_lang_invoke_MethodType::compute_offsets(); 3420 java_lang_invoke_CallSite::compute_offsets(); 3421 java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets(); 3422 java_security_AccessControlContext::compute_offsets(); 3423 // Initialize reflection classes. The layouts of these classes 3424 // changed with the new reflection implementation in JDK 1.4, and 3425 // since the Universe doesn't know what JDK version it is until this 3426 // point we defer computation of these offsets until now. 3427 java_lang_reflect_AccessibleObject::compute_offsets(); 3428 java_lang_reflect_Method::compute_offsets(); 3429 java_lang_reflect_Constructor::compute_offsets(); 3430 java_lang_reflect_Field::compute_offsets(); 3431 java_nio_Buffer::compute_offsets(); 3432 sun_reflect_ConstantPool::compute_offsets(); 3433 sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets(); 3434 java_lang_reflect_Parameter::compute_offsets(); 3435 3436 // generated interpreter code wants to know about the offsets we just computed: 3437 AbstractAssembler::update_delayed_values(); 3438 } 3439 3440 #ifndef PRODUCT 3441 3442 // These functions exist to assert the validity of hard-coded field offsets to guard 3443 // against changes in the class files 3444 3445 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 3446 EXCEPTION_MARK; 3447 fieldDescriptor fd; 3448 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3449 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3450 instanceKlassHandle h_klass (THREAD, k); 3451 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3452 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3453 if (!h_klass->find_local_field(f_name, f_sig, &fd)) { 3454 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 3455 return false; 3456 } 3457 if (fd.is_static()) { 3458 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 3459 return false; 3460 } 3461 if (fd.offset() == hardcoded_offset ) { 3462 return true; 3463 } else { 3464 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.", 3465 klass_name, field_name, hardcoded_offset, fd.offset()); 3466 return false; 3467 } 3468 } 3469 3470 3471 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 3472 EXCEPTION_MARK; 3473 fieldDescriptor fd; 3474 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3475 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3476 instanceKlassHandle h_klass (THREAD, k); 3477 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3478 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3479 if (!h_klass->find_local_field(f_name, f_sig, &fd)) { 3480 tty->print_cr("Static field %s.%s not found", klass_name, field_name); 3481 return false; 3482 } 3483 if (!fd.is_static()) { 3484 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name); 3485 return false; 3486 } 3487 if (fd.offset() == hardcoded_offset + InstanceMirrorKlass::offset_of_static_fields()) { 3488 return true; 3489 } else { 3490 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()); 3491 return false; 3492 } 3493 } 3494 3495 3496 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) { 3497 EXCEPTION_MARK; 3498 fieldDescriptor fd; 3499 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3500 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3501 instanceKlassHandle h_klass (THREAD, k); 3502 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3503 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3504 if (!h_klass->find_local_field(f_name, f_sig, &fd)) { 3505 tty->print_cr("Static field %s.%s not found", klass_name, field_name); 3506 return false; 3507 } 3508 if (!fd.is_static() || !fd.has_initial_value()) { 3509 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name); 3510 return false; 3511 } 3512 if (!fd.initial_value_tag().is_int()) { 3513 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name); 3514 return false; 3515 } 3516 jint field_value = fd.int_initial_value(); 3517 if (field_value == hardcoded_constant) { 3518 return true; 3519 } else { 3520 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); 3521 return false; 3522 } 3523 } 3524 3525 3526 // Check the hard-coded field offsets of all the classes in this file 3527 3528 void JavaClasses::check_offsets() { 3529 bool valid = true; 3530 HandleMark hm; 3531 3532 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3533 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig) 3534 3535 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3536 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig) 3537 3538 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3539 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig) 3540 3541 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \ 3542 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig) 3543 3544 // java.lang.String 3545 3546 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C"); 3547 if (java_lang_String::has_offset_field()) { 3548 CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I"); 3549 CHECK_OFFSET("java/lang/String", java_lang_String, count, "I"); 3550 } 3551 if (java_lang_String::has_hash_field()) { 3552 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I"); 3553 } 3554 3555 // java.lang.Class 3556 3557 // Fake fields 3558 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked 3559 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked 3560 3561 // java.lang.Throwable 3562 3563 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;"); 3564 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;"); 3565 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;"); 3566 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;"); 3567 3568 // Boxed primitive objects (java_lang_boxing_object) 3569 3570 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 3571 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 3572 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 3573 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 3574 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 3575 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 3576 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 3577 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 3578 3579 // java.lang.ClassLoader 3580 3581 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;"); 3582 3583 // java.lang.System 3584 3585 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;"); 3586 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;"); 3587 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;"); 3588 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, security, "Ljava/lang/SecurityManager;"); 3589 3590 // java.lang.StackTraceElement 3591 3592 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;"); 3593 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;"); 3594 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;"); 3595 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I"); 3596 3597 // java.lang.ref.Reference 3598 3599 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;"); 3600 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;"); 3601 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;"); 3602 // Fake field 3603 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;"); 3604 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;"); 3605 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;"); 3606 3607 // java.lang.ref.SoftReference 3608 3609 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J"); 3610 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J"); 3611 3612 // java.lang.AssertionStatusDirectives 3613 // 3614 // The CheckAssertionStatusDirectives boolean can be removed from here and 3615 // globals.hpp after the AssertionStatusDirectives class has been integrated 3616 // into merlin "for some time." Without it, the vm will fail with early 3617 // merlin builds. 3618 3619 if (CheckAssertionStatusDirectives) { 3620 const char* nm = "java/lang/AssertionStatusDirectives"; 3621 const char* sig = "[Ljava/lang/String;"; 3622 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig); 3623 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z"); 3624 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig); 3625 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z"); 3626 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z"); 3627 } 3628 3629 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed"); 3630 } 3631 3632 #endif // PRODUCT 3633 3634 int InjectedField::compute_offset() { 3635 Klass* klass_oop = klass(); 3636 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) { 3637 if (!may_be_java && !fs.access_flags().is_internal()) { 3638 // Only look at injected fields 3639 continue; 3640 } 3641 if (fs.name() == name() && fs.signature() == signature()) { 3642 return fs.offset(); 3643 } 3644 } 3645 ResourceMark rm; 3646 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)" : ""); 3647 #ifndef PRODUCT 3648 klass_oop->print(); 3649 tty->print_cr("all fields:"); 3650 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) { 3651 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 3652 } 3653 #endif //PRODUCT 3654 vm_exit_during_initialization("Invalid layout of preloaded class: use -XX:+TraceClassLoading to see the origin of the problem class"); 3655 return -1; 3656 } 3657 3658 void javaClasses_init() { 3659 JavaClasses::compute_offsets(); 3660 JavaClasses::check_offsets(); 3661 FilteredFieldsMap::initialize(); // must be done after computing offsets. 3662 }