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