1 /* 2 * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "classfile/altHashing.hpp" 27 #include "classfile/javaClasses.inline.hpp" 28 #include "classfile/stringTable.hpp" 29 #include "classfile/vmSymbols.hpp" 30 #include "code/debugInfo.hpp" 31 #include "code/pcDesc.hpp" 32 #include "interpreter/interpreter.hpp" 33 #include "memory/oopFactory.hpp" 34 #include "memory/resourceArea.hpp" 35 #include "memory/universe.inline.hpp" 36 #include "oops/fieldStreams.hpp" 37 #include "oops/instanceKlass.hpp" 38 #include "oops/instanceMirrorKlass.hpp" 39 #include "oops/klass.hpp" 40 #include "oops/method.hpp" 41 #include "oops/objArrayOop.inline.hpp" 42 #include "oops/oop.inline.hpp" 43 #include "oops/symbol.hpp" 44 #include "oops/typeArrayOop.hpp" 45 #include "prims/jvmtiRedefineClassesTrace.hpp" 46 #include "runtime/fieldDescriptor.hpp" 47 #include "runtime/handles.inline.hpp" 48 #include "runtime/interfaceSupport.hpp" 49 #include "runtime/java.hpp" 50 #include "runtime/javaCalls.hpp" 51 #include "runtime/safepoint.hpp" 52 #include "runtime/thread.inline.hpp" 53 #include "runtime/vframe.hpp" 54 #include "utilities/preserveException.hpp" 55 56 #if INCLUDE_JVMCI 57 #include "jvmci/jvmciJavaClasses.hpp" 58 #endif 59 60 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \ 61 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum); 62 63 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \ 64 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java }, 65 66 InjectedField JavaClasses::_injected_fields[] = { 67 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD) 68 }; 69 70 int JavaClasses::compute_injected_offset(InjectedFieldID id) { 71 return _injected_fields[id].compute_offset(); 72 } 73 74 75 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) { 76 *field_count = 0; 77 78 vmSymbols::SID sid = vmSymbols::find_sid(class_name); 79 if (sid == vmSymbols::NO_SID) { 80 // Only well known classes can inject fields 81 return NULL; 82 } 83 84 int count = 0; 85 int start = -1; 86 87 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \ 88 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \ 89 count++; \ 90 if (start == -1) start = klass##_##name##_enum; \ 91 } 92 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD); 93 #undef LOOKUP_INJECTED_FIELD 94 95 if (start != -1) { 96 *field_count = count; 97 return _injected_fields + start; 98 } 99 return NULL; 100 } 101 102 103 static bool find_field(InstanceKlass* ik, 104 Symbol* name_symbol, Symbol* signature_symbol, 105 fieldDescriptor* fd, 106 bool is_static = false, bool allow_super = false) { 107 if (allow_super || is_static) { 108 return ik->find_field(name_symbol, signature_symbol, is_static, fd) != NULL; 109 } else { 110 return ik->find_local_field(name_symbol, signature_symbol, fd); 111 } 112 } 113 114 // Helpful routine for computing field offsets at run time rather than hardcoding them 115 static void 116 compute_offset(int &dest_offset, 117 Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol, 118 bool is_static = false, bool allow_super = false) { 119 fieldDescriptor fd; 120 InstanceKlass* ik = InstanceKlass::cast(klass_oop); 121 if (!find_field(ik, name_symbol, signature_symbol, &fd, is_static, allow_super)) { 122 ResourceMark rm; 123 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string()); 124 #ifndef PRODUCT 125 klass_oop->print(); 126 tty->print_cr("all fields:"); 127 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) { 128 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 129 } 130 #endif //PRODUCT 131 vm_exit_during_initialization("Invalid layout of preloaded class: use -XX:+TraceClassLoading to see the origin of the problem class"); 132 } 133 dest_offset = fd.offset(); 134 } 135 136 // Same as above but for "optional" offsets that might not be present in certain JDK versions 137 static void 138 compute_optional_offset(int& dest_offset, 139 Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol, 140 bool allow_super = false) { 141 fieldDescriptor fd; 142 InstanceKlass* ik = InstanceKlass::cast(klass_oop); 143 if (find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) { 144 dest_offset = fd.offset(); 145 } 146 } 147 148 149 int java_lang_String::value_offset = 0; 150 int java_lang_String::offset_offset = 0; 151 int java_lang_String::count_offset = 0; 152 int java_lang_String::hash_offset = 0; 153 154 bool java_lang_String::initialized = false; 155 156 bool java_lang_String::is_instance(oop obj) { 157 return is_instance_inlined(obj); 158 } 159 160 void java_lang_String::compute_offsets() { 161 assert(!initialized, "offsets should be initialized only once"); 162 163 Klass* k = SystemDictionary::String_klass(); 164 compute_offset(value_offset, k, vmSymbols::value_name(), vmSymbols::char_array_signature()); 165 compute_optional_offset(offset_offset, k, vmSymbols::offset_name(), vmSymbols::int_signature()); 166 compute_optional_offset(count_offset, k, vmSymbols::count_name(), vmSymbols::int_signature()); 167 compute_optional_offset(hash_offset, k, vmSymbols::hash_name(), vmSymbols::int_signature()); 168 169 initialized = true; 170 } 171 172 Handle java_lang_String::basic_create(int length, TRAPS) { 173 assert(initialized, "Must be initialized"); 174 // Create the String object first, so there's a chance that the String 175 // and the char array it points to end up in the same cache line. 176 oop obj; 177 obj = InstanceKlass::cast(SystemDictionary::String_klass())->allocate_instance(CHECK_NH); 178 179 // Create the char array. The String object must be handlized here 180 // because GC can happen as a result of the allocation attempt. 181 Handle h_obj(THREAD, obj); 182 typeArrayOop buffer; 183 buffer = oopFactory::new_charArray(length, CHECK_NH); 184 185 // Point the String at the char array 186 obj = h_obj(); 187 set_value(obj, buffer); 188 // No need to zero the offset, allocation zero'ed the entire String object 189 assert(offset(obj) == 0, "initial String offset should be zero"); 190 //set_offset(obj, 0); 191 set_count(obj, length); 192 193 return h_obj; 194 } 195 196 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) { 197 Handle h_obj = basic_create(length, CHECK_NH); 198 typeArrayOop buffer = value(h_obj()); 199 for (int index = 0; index < length; index++) { 200 buffer->char_at_put(index, unicode[index]); 201 } 202 return h_obj; 203 } 204 205 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) { 206 Handle h_obj = create_from_unicode(unicode, length, CHECK_0); 207 return h_obj(); 208 } 209 210 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) { 211 if (utf8_str == NULL) { 212 return Handle(); 213 } 214 int length = UTF8::unicode_length(utf8_str); 215 Handle h_obj = basic_create(length, CHECK_NH); 216 if (length > 0) { 217 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 218 } 219 return h_obj; 220 } 221 222 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) { 223 Handle h_obj = create_from_str(utf8_str, CHECK_0); 224 return h_obj(); 225 } 226 227 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) { 228 int length = UTF8::unicode_length((char*)symbol->bytes(), symbol->utf8_length()); 229 Handle h_obj = basic_create(length, CHECK_NH); 230 if (length > 0) { 231 UTF8::convert_to_unicode((char*)symbol->bytes(), value(h_obj())->char_at_addr(0), length); 232 } 233 return h_obj; 234 } 235 236 // Converts a C string to a Java String based on current encoding 237 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) { 238 assert(str != NULL, "bad arguments"); 239 240 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *); 241 static to_java_string_fn_t _to_java_string_fn = NULL; 242 243 if (_to_java_string_fn == NULL) { 244 void *lib_handle = os::native_java_library(); 245 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform")); 246 if (_to_java_string_fn == NULL) { 247 fatal("NewStringPlatform missing"); 248 } 249 } 250 251 jstring js = NULL; 252 { JavaThread* thread = (JavaThread*)THREAD; 253 assert(thread->is_Java_thread(), "must be java thread"); 254 HandleMark hm(thread); 255 ThreadToNativeFromVM ttn(thread); 256 js = (_to_java_string_fn)(thread->jni_environment(), str); 257 } 258 return Handle(THREAD, JNIHandles::resolve(js)); 259 } 260 261 // Converts a Java String to a native C string that can be used for 262 // native OS calls. 263 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) { 264 265 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*); 266 static to_platform_string_fn_t _to_platform_string_fn = NULL; 267 268 if (_to_platform_string_fn == NULL) { 269 void *lib_handle = os::native_java_library(); 270 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars")); 271 if (_to_platform_string_fn == NULL) { 272 fatal("GetStringPlatformChars missing"); 273 } 274 } 275 276 char *native_platform_string; 277 { JavaThread* thread = (JavaThread*)THREAD; 278 assert(thread->is_Java_thread(), "must be java thread"); 279 JNIEnv *env = thread->jni_environment(); 280 jstring js = (jstring) JNIHandles::make_local(env, java_string()); 281 bool is_copy; 282 HandleMark hm(thread); 283 ThreadToNativeFromVM ttn(thread); 284 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy); 285 assert(is_copy == JNI_TRUE, "is_copy value changed"); 286 JNIHandles::destroy_local(js); 287 } 288 return native_platform_string; 289 } 290 291 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) { 292 oop obj = java_string(); 293 // Typical usage is to convert all '/' to '.' in string. 294 typeArrayOop value = java_lang_String::value(obj); 295 int offset = java_lang_String::offset(obj); 296 int length = java_lang_String::length(obj); 297 298 // First check if any from_char exist 299 int index; // Declared outside, used later 300 for (index = 0; index < length; index++) { 301 if (value->char_at(index + offset) == from_char) { 302 break; 303 } 304 } 305 if (index == length) { 306 // No from_char, so do not copy. 307 return java_string; 308 } 309 310 // Create new UNICODE buffer. Must handlize value because GC 311 // may happen during String and char array creation. 312 typeArrayHandle h_value(THREAD, value); 313 Handle string = basic_create(length, CHECK_NH); 314 315 typeArrayOop from_buffer = h_value(); 316 typeArrayOop to_buffer = java_lang_String::value(string()); 317 318 // Copy contents 319 for (index = 0; index < length; index++) { 320 jchar c = from_buffer->char_at(index + offset); 321 if (c == from_char) { 322 c = to_char; 323 } 324 to_buffer->char_at_put(index, c); 325 } 326 return string; 327 } 328 329 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) { 330 typeArrayOop value = java_lang_String::value(java_string); 331 int offset = java_lang_String::offset(java_string); 332 length = java_lang_String::length(java_string); 333 334 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length); 335 if (result != NULL) { 336 for (int index = 0; index < length; index++) { 337 result[index] = value->char_at(index + offset); 338 } 339 } else { 340 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string"); 341 } 342 return result; 343 } 344 345 unsigned int java_lang_String::hash_code(oop java_string) { 346 int length = java_lang_String::length(java_string); 347 // Zero length string will hash to zero with String.hashCode() function. 348 if (length == 0) return 0; 349 350 typeArrayOop value = java_lang_String::value(java_string); 351 int offset = java_lang_String::offset(java_string); 352 return java_lang_String::hash_code(value->char_at_addr(offset), length); 353 } 354 355 char* java_lang_String::as_quoted_ascii(oop java_string) { 356 typeArrayOop value = java_lang_String::value(java_string); 357 int offset = java_lang_String::offset(java_string); 358 int length = java_lang_String::length(java_string); 359 360 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset); 361 if (base == NULL) return NULL; 362 363 int result_length = UNICODE::quoted_ascii_length(base, length) + 1; 364 char* result = NEW_RESOURCE_ARRAY(char, result_length); 365 UNICODE::as_quoted_ascii(base, length, result, result_length); 366 assert(result_length >= length + 1, "must not be shorter"); 367 assert(result_length == (int)strlen(result) + 1, "must match"); 368 return result; 369 } 370 371 unsigned int java_lang_String::hash_string(oop java_string) { 372 int length = java_lang_String::length(java_string); 373 // Zero length string doesn't hash necessarily hash to zero. 374 if (length == 0) { 375 return StringTable::hash_string(NULL, 0); 376 } 377 378 typeArrayOop value = java_lang_String::value(java_string); 379 int offset = java_lang_String::offset(java_string); 380 return StringTable::hash_string(value->char_at_addr(offset), length); 381 } 382 383 Symbol* java_lang_String::as_symbol(Handle java_string, TRAPS) { 384 oop obj = java_string(); 385 typeArrayOop value = java_lang_String::value(obj); 386 int offset = java_lang_String::offset(obj); 387 int length = java_lang_String::length(obj); 388 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset); 389 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD); 390 return sym; 391 } 392 393 Symbol* java_lang_String::as_symbol_or_null(oop java_string) { 394 typeArrayOop value = java_lang_String::value(java_string); 395 int offset = java_lang_String::offset(java_string); 396 int length = java_lang_String::length(java_string); 397 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset); 398 return SymbolTable::probe_unicode(base, length); 399 } 400 401 402 int java_lang_String::utf8_length(oop java_string) { 403 typeArrayOop value = java_lang_String::value(java_string); 404 int offset = java_lang_String::offset(java_string); 405 int length = java_lang_String::length(java_string); 406 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset); 407 return UNICODE::utf8_length(position, length); 408 } 409 410 char* java_lang_String::as_utf8_string(oop java_string) { 411 typeArrayOop value = java_lang_String::value(java_string); 412 int offset = java_lang_String::offset(java_string); 413 int length = java_lang_String::length(java_string); 414 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset); 415 return UNICODE::as_utf8(position, length); 416 } 417 418 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) { 419 typeArrayOop value = java_lang_String::value(java_string); 420 int offset = java_lang_String::offset(java_string); 421 int length = java_lang_String::length(java_string); 422 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset); 423 return UNICODE::as_utf8(position, length, buf, buflen); 424 } 425 426 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) { 427 typeArrayOop value = java_lang_String::value(java_string); 428 int offset = java_lang_String::offset(java_string); 429 int length = java_lang_String::length(java_string); 430 assert(start + len <= length, "just checking"); 431 jchar* position = value->char_at_addr(offset + start); 432 return UNICODE::as_utf8(position, len); 433 } 434 435 char* java_lang_String::as_utf8_string(oop java_string, int start, int len, char* buf, int buflen) { 436 typeArrayOop value = java_lang_String::value(java_string); 437 int offset = java_lang_String::offset(java_string); 438 int length = java_lang_String::length(java_string); 439 assert(start + len <= length, "just checking"); 440 jchar* position = value->char_at_addr(offset + start); 441 return UNICODE::as_utf8(position, len, buf, buflen); 442 } 443 444 bool java_lang_String::equals(oop java_string, jchar* chars, int len) { 445 assert(java_string->klass() == SystemDictionary::String_klass(), 446 "must be java_string"); 447 typeArrayOop value = java_lang_String::value(java_string); 448 int offset = java_lang_String::offset(java_string); 449 int length = java_lang_String::length(java_string); 450 if (length != len) { 451 return false; 452 } 453 for (int i = 0; i < len; i++) { 454 if (value->char_at(i + offset) != chars[i]) { 455 return false; 456 } 457 } 458 return true; 459 } 460 461 bool java_lang_String::equals(oop str1, oop str2) { 462 assert(str1->klass() == SystemDictionary::String_klass(), 463 "must be java String"); 464 assert(str2->klass() == SystemDictionary::String_klass(), 465 "must be java String"); 466 typeArrayOop value1 = java_lang_String::value(str1); 467 int offset1 = java_lang_String::offset(str1); 468 int length1 = java_lang_String::length(str1); 469 typeArrayOop value2 = java_lang_String::value(str2); 470 int offset2 = java_lang_String::offset(str2); 471 int length2 = java_lang_String::length(str2); 472 473 if (length1 != length2) { 474 return false; 475 } 476 for (int i = 0; i < length1; i++) { 477 if (value1->char_at(i + offset1) != value2->char_at(i + offset2)) { 478 return false; 479 } 480 } 481 return true; 482 } 483 484 void java_lang_String::print(oop java_string, outputStream* st) { 485 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string"); 486 typeArrayOop value = java_lang_String::value(java_string); 487 488 if (value == NULL) { 489 // This can happen if, e.g., printing a String 490 // object before its initializer has been called 491 st->print("NULL"); 492 return; 493 } 494 495 int offset = java_lang_String::offset(java_string); 496 int length = java_lang_String::length(java_string); 497 498 st->print("\""); 499 for (int index = 0; index < length; index++) { 500 st->print("%c", value->char_at(index + offset)); 501 } 502 st->print("\""); 503 } 504 505 506 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 507 assert(mirror.not_null() && fd->is_static(), "just checking"); 508 if (fd->has_initial_value()) { 509 BasicType t = fd->field_type(); 510 switch (t) { 511 case T_BYTE: 512 mirror()->byte_field_put(fd->offset(), fd->int_initial_value()); 513 break; 514 case T_BOOLEAN: 515 mirror()->bool_field_put(fd->offset(), fd->int_initial_value()); 516 break; 517 case T_CHAR: 518 mirror()->char_field_put(fd->offset(), fd->int_initial_value()); 519 break; 520 case T_SHORT: 521 mirror()->short_field_put(fd->offset(), fd->int_initial_value()); 522 break; 523 case T_INT: 524 mirror()->int_field_put(fd->offset(), fd->int_initial_value()); 525 break; 526 case T_FLOAT: 527 mirror()->float_field_put(fd->offset(), fd->float_initial_value()); 528 break; 529 case T_DOUBLE: 530 mirror()->double_field_put(fd->offset(), fd->double_initial_value()); 531 break; 532 case T_LONG: 533 mirror()->long_field_put(fd->offset(), fd->long_initial_value()); 534 break; 535 case T_OBJECT: 536 { 537 #ifdef ASSERT 538 TempNewSymbol sym = SymbolTable::new_symbol("Ljava/lang/String;", CHECK); 539 assert(fd->signature() == sym, "just checking"); 540 #endif 541 oop string = fd->string_initial_value(CHECK); 542 mirror()->obj_field_put(fd->offset(), string); 543 } 544 break; 545 default: 546 THROW_MSG(vmSymbols::java_lang_ClassFormatError(), 547 "Illegal ConstantValue attribute in class file"); 548 } 549 } 550 } 551 552 553 void java_lang_Class::fixup_mirror(KlassHandle k, TRAPS) { 554 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already"); 555 556 // If the offset was read from the shared archive, it was fixed up already 557 if (!k->is_shared()) { 558 if (k->oop_is_instance()) { 559 // During bootstrap, java.lang.Class wasn't loaded so static field 560 // offsets were computed without the size added it. Go back and 561 // update all the static field offsets to included the size. 562 for (JavaFieldStream fs(InstanceKlass::cast(k())); !fs.done(); fs.next()) { 563 if (fs.access_flags().is_static()) { 564 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields(); 565 fs.set_offset(real_offset); 566 } 567 } 568 } 569 } 570 create_mirror(k, Handle(NULL), Handle(NULL), CHECK); 571 } 572 573 void java_lang_Class::initialize_mirror_fields(KlassHandle k, 574 Handle mirror, 575 Handle protection_domain, 576 TRAPS) { 577 // Allocate a simple java object for a lock. 578 // This needs to be a java object because during class initialization 579 // it can be held across a java call. 580 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK); 581 set_init_lock(mirror(), r); 582 583 // Set protection domain also 584 set_protection_domain(mirror(), protection_domain()); 585 586 // Initialize static fields 587 InstanceKlass::cast(k())->do_local_static_fields(&initialize_static_field, mirror, CHECK); 588 } 589 590 void java_lang_Class::create_mirror(KlassHandle k, Handle class_loader, 591 Handle protection_domain, TRAPS) { 592 assert(k->java_mirror() == NULL, "should only assign mirror once"); 593 // Use this moment of initialization to cache modifier_flags also, 594 // to support Class.getModifiers(). Instance classes recalculate 595 // the cached flags after the class file is parsed, but before the 596 // class is put into the system dictionary. 597 int computed_modifiers = k->compute_modifier_flags(CHECK); 598 k->set_modifier_flags(computed_modifiers); 599 // Class_klass has to be loaded because it is used to allocate 600 // the mirror. 601 if (SystemDictionary::Class_klass_loaded()) { 602 // Allocate mirror (java.lang.Class instance) 603 Handle mirror = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK); 604 605 // Setup indirection from mirror->klass 606 if (!k.is_null()) { 607 java_lang_Class::set_klass(mirror(), k()); 608 } 609 610 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass()); 611 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set"); 612 613 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror())); 614 615 // It might also have a component mirror. This mirror must already exist. 616 if (k->oop_is_array()) { 617 Handle comp_mirror; 618 if (k->oop_is_typeArray()) { 619 BasicType type = TypeArrayKlass::cast(k())->element_type(); 620 comp_mirror = Universe::java_mirror(type); 621 } else { 622 assert(k->oop_is_objArray(), "Must be"); 623 Klass* element_klass = ObjArrayKlass::cast(k())->element_klass(); 624 assert(element_klass != NULL, "Must have an element klass"); 625 comp_mirror = element_klass->java_mirror(); 626 } 627 assert(comp_mirror.not_null(), "must have a mirror"); 628 629 // Two-way link between the array klass and its component mirror: 630 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k 631 set_component_mirror(mirror(), comp_mirror()); 632 set_array_klass(comp_mirror(), k()); 633 } else { 634 assert(k->oop_is_instance(), "Must be"); 635 636 initialize_mirror_fields(k, mirror, protection_domain, THREAD); 637 if (HAS_PENDING_EXCEPTION) { 638 // If any of the fields throws an exception like OOM remove the klass field 639 // from the mirror so GC doesn't follow it after the klass has been deallocated. 640 // This mirror looks like a primitive type, which logically it is because it 641 // it represents no class. 642 java_lang_Class::set_klass(mirror(), NULL); 643 return; 644 } 645 } 646 647 // set the classLoader field in the java_lang_Class instance 648 assert(class_loader() == k->class_loader(), "should be same"); 649 set_class_loader(mirror(), class_loader()); 650 651 // Setup indirection from klass->mirror last 652 // after any exceptions can happen during allocations. 653 if (!k.is_null()) { 654 k->set_java_mirror(mirror()); 655 } 656 } else { 657 if (fixup_mirror_list() == NULL) { 658 GrowableArray<Klass*>* list = 659 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true); 660 set_fixup_mirror_list(list); 661 } 662 fixup_mirror_list()->push(k()); 663 } 664 } 665 666 667 int java_lang_Class::oop_size(oop java_class) { 668 assert(_oop_size_offset != 0, "must be set"); 669 return java_class->int_field(_oop_size_offset); 670 } 671 void java_lang_Class::set_oop_size(oop java_class, int size) { 672 assert(_oop_size_offset != 0, "must be set"); 673 java_class->int_field_put(_oop_size_offset, size); 674 } 675 int java_lang_Class::static_oop_field_count(oop java_class) { 676 assert(_static_oop_field_count_offset != 0, "must be set"); 677 return java_class->int_field(_static_oop_field_count_offset); 678 } 679 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) { 680 assert(_static_oop_field_count_offset != 0, "must be set"); 681 java_class->int_field_put(_static_oop_field_count_offset, size); 682 } 683 684 oop java_lang_Class::protection_domain(oop java_class) { 685 assert(_protection_domain_offset != 0, "must be set"); 686 return java_class->obj_field(_protection_domain_offset); 687 } 688 void java_lang_Class::set_protection_domain(oop java_class, oop pd) { 689 assert(_protection_domain_offset != 0, "must be set"); 690 java_class->obj_field_put(_protection_domain_offset, pd); 691 } 692 693 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) { 694 assert(_component_mirror_offset != 0, "must be set"); 695 java_class->obj_field_put(_component_mirror_offset, comp_mirror); 696 } 697 oop java_lang_Class::component_mirror(oop java_class) { 698 assert(_component_mirror_offset != 0, "must be set"); 699 return java_class->obj_field(_component_mirror_offset); 700 } 701 702 oop java_lang_Class::init_lock(oop java_class) { 703 assert(_init_lock_offset != 0, "must be set"); 704 return java_class->obj_field(_init_lock_offset); 705 } 706 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) { 707 assert(_init_lock_offset != 0, "must be set"); 708 java_class->obj_field_put(_init_lock_offset, init_lock); 709 } 710 711 objArrayOop java_lang_Class::signers(oop java_class) { 712 assert(_signers_offset != 0, "must be set"); 713 return (objArrayOop)java_class->obj_field(_signers_offset); 714 } 715 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) { 716 assert(_signers_offset != 0, "must be set"); 717 java_class->obj_field_put(_signers_offset, (oop)signers); 718 } 719 720 721 void java_lang_Class::set_class_loader(oop java_class, oop loader) { 722 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet. 723 if (_class_loader_offset != 0) { 724 java_class->obj_field_put(_class_loader_offset, loader); 725 } 726 } 727 728 oop java_lang_Class::class_loader(oop java_class) { 729 assert(_class_loader_offset != 0, "must be set"); 730 return java_class->obj_field(_class_loader_offset); 731 } 732 733 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) { 734 // This should be improved by adding a field at the Java level or by 735 // introducing a new VM klass (see comment in ClassFileParser) 736 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0); 737 if (type != T_VOID) { 738 Klass* aklass = Universe::typeArrayKlassObj(type); 739 assert(aklass != NULL, "correct bootstrap"); 740 set_array_klass(java_class, aklass); 741 } 742 #ifdef ASSERT 743 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass()); 744 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation"); 745 #endif 746 return java_class; 747 } 748 749 750 Klass* java_lang_Class::as_Klass(oop java_class) { 751 //%note memory_2 752 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 753 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset)); 754 assert(k == NULL || k->is_klass(), "type check"); 755 return k; 756 } 757 758 759 void java_lang_Class::set_klass(oop java_class, Klass* klass) { 760 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 761 java_class->metadata_field_put(_klass_offset, klass); 762 } 763 764 765 void java_lang_Class::print_signature(oop java_class, outputStream* st) { 766 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 767 Symbol* name = NULL; 768 bool is_instance = false; 769 if (is_primitive(java_class)) { 770 name = vmSymbols::type_signature(primitive_type(java_class)); 771 } else { 772 Klass* k = as_Klass(java_class); 773 is_instance = k->oop_is_instance(); 774 name = k->name(); 775 } 776 if (name == NULL) { 777 st->print("<null>"); 778 return; 779 } 780 if (is_instance) st->print("L"); 781 st->write((char*) name->base(), (int) name->utf8_length()); 782 if (is_instance) st->print(";"); 783 } 784 785 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) { 786 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 787 Symbol* name; 788 if (is_primitive(java_class)) { 789 name = vmSymbols::type_signature(primitive_type(java_class)); 790 // Because this can create a new symbol, the caller has to decrement 791 // the refcount, so make adjustment here and below for symbols returned 792 // that are not created or incremented due to a successful lookup. 793 name->increment_refcount(); 794 } else { 795 Klass* k = as_Klass(java_class); 796 if (!k->oop_is_instance()) { 797 name = k->name(); 798 name->increment_refcount(); 799 } else { 800 ResourceMark rm; 801 const char* sigstr = k->signature_name(); 802 int siglen = (int) strlen(sigstr); 803 if (!intern_if_not_found) { 804 name = SymbolTable::probe(sigstr, siglen); 805 } else { 806 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 807 } 808 } 809 } 810 return name; 811 } 812 813 // Returns the Java name for this Java mirror (Resource allocated) 814 // See Klass::external_name(). 815 // For primitive type Java mirrors, its type name is returned. 816 const char* java_lang_Class::as_external_name(oop java_class) { 817 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 818 const char* name = NULL; 819 if (is_primitive(java_class)) { 820 name = type2name(primitive_type(java_class)); 821 } else { 822 name = as_Klass(java_class)->external_name(); 823 } 824 if (name == NULL) { 825 name = "<null>"; 826 } 827 return name; 828 } 829 830 Klass* java_lang_Class::array_klass(oop java_class) { 831 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset)); 832 assert(k == NULL || k->is_klass() && k->oop_is_array(), "should be array klass"); 833 return k; 834 } 835 836 837 void java_lang_Class::set_array_klass(oop java_class, Klass* klass) { 838 assert(klass->is_klass() && klass->oop_is_array(), "should be array klass"); 839 java_class->metadata_field_put(_array_klass_offset, klass); 840 } 841 842 843 bool java_lang_Class::is_primitive(oop java_class) { 844 // should assert: 845 //assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 846 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL); 847 848 #ifdef ASSERT 849 if (is_primitive) { 850 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset)); 851 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()), 852 "Should be either the T_VOID primitive or a java primitive"); 853 } 854 #endif 855 856 return is_primitive; 857 } 858 859 860 BasicType java_lang_Class::primitive_type(oop java_class) { 861 assert(java_lang_Class::is_primitive(java_class), "just checking"); 862 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset)); 863 BasicType type = T_VOID; 864 if (ak != NULL) { 865 // Note: create_basic_type_mirror above initializes ak to a non-null value. 866 type = ArrayKlass::cast(ak)->element_type(); 867 } else { 868 assert(java_class == Universe::void_mirror(), "only valid non-array primitive"); 869 } 870 assert(Universe::java_mirror(type) == java_class, "must be consistent"); 871 return type; 872 } 873 874 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) { 875 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 876 if (is_primitive(java_class)) { 877 if (reference_klass != NULL) 878 (*reference_klass) = NULL; 879 return primitive_type(java_class); 880 } else { 881 if (reference_klass != NULL) 882 (*reference_klass) = as_Klass(java_class); 883 return T_OBJECT; 884 } 885 } 886 887 888 oop java_lang_Class::primitive_mirror(BasicType t) { 889 oop mirror = Universe::java_mirror(t); 890 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class"); 891 assert(java_lang_Class::is_primitive(mirror), "must be primitive"); 892 return mirror; 893 } 894 895 bool java_lang_Class::offsets_computed = false; 896 int java_lang_Class::classRedefinedCount_offset = -1; 897 898 void java_lang_Class::compute_offsets() { 899 assert(!offsets_computed, "offsets should be initialized only once"); 900 offsets_computed = true; 901 902 Klass* k = SystemDictionary::Class_klass(); 903 // The classRedefinedCount field is only present starting in 1.5, 904 // so don't go fatal. 905 compute_optional_offset(classRedefinedCount_offset, 906 k, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature()); 907 908 // Needs to be optional because the old build runs Queens during bootstrapping 909 // and jdk8-9 doesn't have coordinated pushes yet. 910 compute_optional_offset(_class_loader_offset, 911 k, vmSymbols::classLoader_name(), 912 vmSymbols::classloader_signature()); 913 914 compute_offset(_component_mirror_offset, 915 k, vmSymbols::componentType_name(), 916 vmSymbols::class_signature()); 917 918 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have 919 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops 920 // GC treats them the same. 921 _init_lock_offset = _component_mirror_offset; 922 923 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 924 } 925 926 int java_lang_Class::classRedefinedCount(oop the_class_mirror) { 927 if (classRedefinedCount_offset == -1) { 928 // If we don't have an offset for it then just return -1 as a marker. 929 return -1; 930 } 931 932 return the_class_mirror->int_field(classRedefinedCount_offset); 933 } 934 935 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) { 936 if (classRedefinedCount_offset == -1) { 937 // If we don't have an offset for it then nothing to set. 938 return; 939 } 940 941 the_class_mirror->int_field_put(classRedefinedCount_offset, value); 942 } 943 944 945 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the 946 // platform thread structure, and a eetop offset which was used for thread 947 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures 948 // merged, so in the HotSpot VM we just use the eetop field for the thread 949 // instead of the privateInfo_offset. 950 // 951 // Note: The stackSize field is only present starting in 1.4. 952 953 int java_lang_Thread::_name_offset = 0; 954 int java_lang_Thread::_group_offset = 0; 955 int java_lang_Thread::_contextClassLoader_offset = 0; 956 int java_lang_Thread::_inheritedAccessControlContext_offset = 0; 957 int java_lang_Thread::_priority_offset = 0; 958 int java_lang_Thread::_eetop_offset = 0; 959 int java_lang_Thread::_daemon_offset = 0; 960 int java_lang_Thread::_stillborn_offset = 0; 961 int java_lang_Thread::_stackSize_offset = 0; 962 int java_lang_Thread::_tid_offset = 0; 963 int java_lang_Thread::_thread_status_offset = 0; 964 int java_lang_Thread::_park_blocker_offset = 0; 965 int java_lang_Thread::_park_event_offset = 0 ; 966 967 968 void java_lang_Thread::compute_offsets() { 969 assert(_group_offset == 0, "offsets should be initialized only once"); 970 971 Klass* k = SystemDictionary::Thread_klass(); 972 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 973 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature()); 974 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature()); 975 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature()); 976 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature()); 977 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature()); 978 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature()); 979 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature()); 980 // The stackSize field is only present starting in 1.4, so don't go fatal. 981 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature()); 982 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal. 983 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature()); 984 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature()); 985 // The parkBlocker field is only present starting in 1.6, so don't go fatal. 986 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature()); 987 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(), 988 vmSymbols::long_signature()); 989 } 990 991 992 JavaThread* java_lang_Thread::thread(oop java_thread) { 993 return (JavaThread*)java_thread->address_field(_eetop_offset); 994 } 995 996 997 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) { 998 java_thread->address_field_put(_eetop_offset, (address)thread); 999 } 1000 1001 1002 oop java_lang_Thread::name(oop java_thread) { 1003 return java_thread->obj_field(_name_offset); 1004 } 1005 1006 1007 void java_lang_Thread::set_name(oop java_thread, oop name) { 1008 java_thread->obj_field_put(_name_offset, name); 1009 } 1010 1011 1012 ThreadPriority java_lang_Thread::priority(oop java_thread) { 1013 return (ThreadPriority)java_thread->int_field(_priority_offset); 1014 } 1015 1016 1017 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) { 1018 java_thread->int_field_put(_priority_offset, priority); 1019 } 1020 1021 1022 oop java_lang_Thread::threadGroup(oop java_thread) { 1023 return java_thread->obj_field(_group_offset); 1024 } 1025 1026 1027 bool java_lang_Thread::is_stillborn(oop java_thread) { 1028 return java_thread->bool_field(_stillborn_offset) != 0; 1029 } 1030 1031 1032 // We never have reason to turn the stillborn bit off 1033 void java_lang_Thread::set_stillborn(oop java_thread) { 1034 java_thread->bool_field_put(_stillborn_offset, true); 1035 } 1036 1037 1038 bool java_lang_Thread::is_alive(oop java_thread) { 1039 JavaThread* thr = java_lang_Thread::thread(java_thread); 1040 return (thr != NULL); 1041 } 1042 1043 1044 bool java_lang_Thread::is_daemon(oop java_thread) { 1045 return java_thread->bool_field(_daemon_offset) != 0; 1046 } 1047 1048 1049 void java_lang_Thread::set_daemon(oop java_thread) { 1050 java_thread->bool_field_put(_daemon_offset, true); 1051 } 1052 1053 oop java_lang_Thread::context_class_loader(oop java_thread) { 1054 return java_thread->obj_field(_contextClassLoader_offset); 1055 } 1056 1057 oop java_lang_Thread::inherited_access_control_context(oop java_thread) { 1058 return java_thread->obj_field(_inheritedAccessControlContext_offset); 1059 } 1060 1061 1062 jlong java_lang_Thread::stackSize(oop java_thread) { 1063 if (_stackSize_offset > 0) { 1064 return java_thread->long_field(_stackSize_offset); 1065 } else { 1066 return 0; 1067 } 1068 } 1069 1070 // Write the thread status value to threadStatus field in java.lang.Thread java class. 1071 void java_lang_Thread::set_thread_status(oop java_thread, 1072 java_lang_Thread::ThreadStatus status) { 1073 // The threadStatus is only present starting in 1.5 1074 if (_thread_status_offset > 0) { 1075 java_thread->int_field_put(_thread_status_offset, status); 1076 } 1077 } 1078 1079 // Read thread status value from threadStatus field in java.lang.Thread java class. 1080 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) { 1081 assert(Thread::current()->is_Watcher_thread() || Thread::current()->is_VM_thread() || 1082 JavaThread::current()->thread_state() == _thread_in_vm, 1083 "Java Thread is not running in vm"); 1084 // The threadStatus is only present starting in 1.5 1085 if (_thread_status_offset > 0) { 1086 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1087 } else { 1088 // All we can easily figure out is if it is alive, but that is 1089 // enough info for a valid unknown status. 1090 // These aren't restricted to valid set ThreadStatus values, so 1091 // use JVMTI values and cast. 1092 JavaThread* thr = java_lang_Thread::thread(java_thread); 1093 if (thr == NULL) { 1094 // the thread hasn't run yet or is in the process of exiting 1095 return NEW; 1096 } 1097 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE; 1098 } 1099 } 1100 1101 1102 jlong java_lang_Thread::thread_id(oop java_thread) { 1103 // The thread ID field is only present starting in 1.5 1104 if (_tid_offset > 0) { 1105 return java_thread->long_field(_tid_offset); 1106 } else { 1107 return 0; 1108 } 1109 } 1110 1111 oop java_lang_Thread::park_blocker(oop java_thread) { 1112 assert(JDK_Version::current().supports_thread_park_blocker() && 1113 _park_blocker_offset != 0, "Must support parkBlocker field"); 1114 1115 if (_park_blocker_offset > 0) { 1116 return java_thread->obj_field(_park_blocker_offset); 1117 } 1118 1119 return NULL; 1120 } 1121 1122 jlong java_lang_Thread::park_event(oop java_thread) { 1123 if (_park_event_offset > 0) { 1124 return java_thread->long_field(_park_event_offset); 1125 } 1126 return 0; 1127 } 1128 1129 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) { 1130 if (_park_event_offset > 0) { 1131 java_thread->long_field_put(_park_event_offset, ptr); 1132 return true; 1133 } 1134 return false; 1135 } 1136 1137 1138 const char* java_lang_Thread::thread_status_name(oop java_thread) { 1139 assert(_thread_status_offset != 0, "Must have thread status"); 1140 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1141 switch (status) { 1142 case NEW : return "NEW"; 1143 case RUNNABLE : return "RUNNABLE"; 1144 case SLEEPING : return "TIMED_WAITING (sleeping)"; 1145 case IN_OBJECT_WAIT : return "WAITING (on object monitor)"; 1146 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)"; 1147 case PARKED : return "WAITING (parking)"; 1148 case PARKED_TIMED : return "TIMED_WAITING (parking)"; 1149 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)"; 1150 case TERMINATED : return "TERMINATED"; 1151 default : return "UNKNOWN"; 1152 }; 1153 } 1154 int java_lang_ThreadGroup::_parent_offset = 0; 1155 int java_lang_ThreadGroup::_name_offset = 0; 1156 int java_lang_ThreadGroup::_threads_offset = 0; 1157 int java_lang_ThreadGroup::_groups_offset = 0; 1158 int java_lang_ThreadGroup::_maxPriority_offset = 0; 1159 int java_lang_ThreadGroup::_destroyed_offset = 0; 1160 int java_lang_ThreadGroup::_daemon_offset = 0; 1161 int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0; 1162 int java_lang_ThreadGroup::_nthreads_offset = 0; 1163 int java_lang_ThreadGroup::_ngroups_offset = 0; 1164 1165 oop java_lang_ThreadGroup::parent(oop java_thread_group) { 1166 assert(java_thread_group->is_oop(), "thread group must be oop"); 1167 return java_thread_group->obj_field(_parent_offset); 1168 } 1169 1170 // ("name as oop" accessor is not necessary) 1171 1172 typeArrayOop java_lang_ThreadGroup::name(oop java_thread_group) { 1173 oop name = java_thread_group->obj_field(_name_offset); 1174 // ThreadGroup.name can be null 1175 return name == NULL ? (typeArrayOop)NULL : java_lang_String::value(name); 1176 } 1177 1178 int java_lang_ThreadGroup::nthreads(oop java_thread_group) { 1179 assert(java_thread_group->is_oop(), "thread group must be oop"); 1180 return java_thread_group->int_field(_nthreads_offset); 1181 } 1182 1183 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) { 1184 oop threads = java_thread_group->obj_field(_threads_offset); 1185 assert(threads != NULL, "threadgroups should have threads"); 1186 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code 1187 return objArrayOop(threads); 1188 } 1189 1190 int java_lang_ThreadGroup::ngroups(oop java_thread_group) { 1191 assert(java_thread_group->is_oop(), "thread group must be oop"); 1192 return java_thread_group->int_field(_ngroups_offset); 1193 } 1194 1195 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) { 1196 oop groups = java_thread_group->obj_field(_groups_offset); 1197 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code 1198 return objArrayOop(groups); 1199 } 1200 1201 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) { 1202 assert(java_thread_group->is_oop(), "thread group must be oop"); 1203 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset); 1204 } 1205 1206 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) { 1207 assert(java_thread_group->is_oop(), "thread group must be oop"); 1208 return java_thread_group->bool_field(_destroyed_offset) != 0; 1209 } 1210 1211 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) { 1212 assert(java_thread_group->is_oop(), "thread group must be oop"); 1213 return java_thread_group->bool_field(_daemon_offset) != 0; 1214 } 1215 1216 bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) { 1217 assert(java_thread_group->is_oop(), "thread group must be oop"); 1218 return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0; 1219 } 1220 1221 void java_lang_ThreadGroup::compute_offsets() { 1222 assert(_parent_offset == 0, "offsets should be initialized only once"); 1223 1224 Klass* k = SystemDictionary::ThreadGroup_klass(); 1225 1226 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature()); 1227 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1228 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature()); 1229 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature()); 1230 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature()); 1231 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature()); 1232 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature()); 1233 compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature()); 1234 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature()); 1235 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature()); 1236 } 1237 1238 oop java_lang_Throwable::unassigned_stacktrace() { 1239 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Throwable_klass()); 1240 address addr = ik->static_field_addr(static_unassigned_stacktrace_offset); 1241 if (UseCompressedOops) { 1242 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 1243 } else { 1244 return oopDesc::load_decode_heap_oop((oop*)addr); 1245 } 1246 } 1247 1248 oop java_lang_Throwable::backtrace(oop throwable) { 1249 return throwable->obj_field_acquire(backtrace_offset); 1250 } 1251 1252 1253 void java_lang_Throwable::set_backtrace(oop throwable, oop value) { 1254 throwable->release_obj_field_put(backtrace_offset, value); 1255 } 1256 1257 1258 oop java_lang_Throwable::message(oop throwable) { 1259 return throwable->obj_field(detailMessage_offset); 1260 } 1261 1262 1263 oop java_lang_Throwable::message(Handle throwable) { 1264 return throwable->obj_field(detailMessage_offset); 1265 } 1266 1267 1268 // Return Symbol for detailed_message or NULL 1269 Symbol* java_lang_Throwable::detail_message(oop throwable) { 1270 PRESERVE_EXCEPTION_MARK; // Keep original exception 1271 oop detailed_message = java_lang_Throwable::message(throwable); 1272 if (detailed_message != NULL) { 1273 return java_lang_String::as_symbol(detailed_message, THREAD); 1274 } 1275 return NULL; 1276 } 1277 1278 void java_lang_Throwable::set_message(oop throwable, oop value) { 1279 throwable->obj_field_put(detailMessage_offset, value); 1280 } 1281 1282 1283 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) { 1284 throwable->obj_field_put(stackTrace_offset, st_element_array); 1285 } 1286 1287 void java_lang_Throwable::clear_stacktrace(oop throwable) { 1288 set_stacktrace(throwable, NULL); 1289 } 1290 1291 1292 void java_lang_Throwable::print(oop throwable, outputStream* st) { 1293 ResourceMark rm; 1294 Klass* k = throwable->klass(); 1295 assert(k != NULL, "just checking"); 1296 st->print("%s", InstanceKlass::cast(k)->external_name()); 1297 oop msg = message(throwable); 1298 if (msg != NULL) { 1299 st->print(": %s", java_lang_String::as_utf8_string(msg)); 1300 } 1301 } 1302 1303 1304 void java_lang_Throwable::print(Handle throwable, outputStream* st) { 1305 ResourceMark rm; 1306 Klass* k = throwable->klass(); 1307 assert(k != NULL, "just checking"); 1308 st->print("%s", InstanceKlass::cast(k)->external_name()); 1309 oop msg = message(throwable); 1310 if (msg != NULL) { 1311 st->print(": %s", java_lang_String::as_utf8_string(msg)); 1312 } 1313 } 1314 1315 // After this many redefines, the stack trace is unreliable. 1316 const int MAX_VERSION = USHRT_MAX; 1317 1318 // Helper backtrace functions to store bci|version together. 1319 static inline int merge_bci_and_version(int bci, int version) { 1320 // only store u2 for version, checking for overflow. 1321 if (version > USHRT_MAX || version < 0) version = MAX_VERSION; 1322 assert((jushort)bci == bci, "bci should be short"); 1323 return build_int_from_shorts(version, bci); 1324 } 1325 1326 static inline int bci_at(unsigned int merged) { 1327 return extract_high_short_from_int(merged); 1328 } 1329 static inline int version_at(unsigned int merged) { 1330 return extract_low_short_from_int(merged); 1331 } 1332 1333 static inline bool version_matches(Method* method, int version) { 1334 assert(version < MAX_VERSION, "version is too big"); 1335 return method != NULL && (method->constants()->version() == version); 1336 } 1337 1338 static inline int get_line_number(Method* method, int bci) { 1339 int line_number = 0; 1340 if (method->is_native()) { 1341 // Negative value different from -1 below, enabling Java code in 1342 // class java.lang.StackTraceElement to distinguish "native" from 1343 // "no LineNumberTable". JDK tests for -2. 1344 line_number = -2; 1345 } else { 1346 // Returns -1 if no LineNumberTable, and otherwise actual line number 1347 line_number = method->line_number_from_bci(bci); 1348 if (line_number == -1 && ShowHiddenFrames) { 1349 line_number = bci + 1000000; 1350 } 1351 } 1352 return line_number; 1353 } 1354 1355 // This class provides a simple wrapper over the internal structure of 1356 // exception backtrace to insulate users of the backtrace from needing 1357 // to know what it looks like. 1358 class BacktraceBuilder: public StackObj { 1359 private: 1360 Handle _backtrace; 1361 objArrayOop _head; 1362 typeArrayOop _methods; 1363 typeArrayOop _bcis; 1364 objArrayOop _mirrors; 1365 typeArrayOop _cprefs; // needed to insulate method name against redefinition 1366 int _index; 1367 No_Safepoint_Verifier _nsv; 1368 1369 public: 1370 1371 enum { 1372 trace_methods_offset = java_lang_Throwable::trace_methods_offset, 1373 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset, 1374 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset, 1375 trace_cprefs_offset = java_lang_Throwable::trace_cprefs_offset, 1376 trace_next_offset = java_lang_Throwable::trace_next_offset, 1377 trace_size = java_lang_Throwable::trace_size, 1378 trace_chunk_size = java_lang_Throwable::trace_chunk_size 1379 }; 1380 1381 // get info out of chunks 1382 static typeArrayOop get_methods(objArrayHandle chunk) { 1383 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset)); 1384 assert(methods != NULL, "method array should be initialized in backtrace"); 1385 return methods; 1386 } 1387 static typeArrayOop get_bcis(objArrayHandle chunk) { 1388 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 1389 assert(bcis != NULL, "bci array should be initialized in backtrace"); 1390 return bcis; 1391 } 1392 static objArrayOop get_mirrors(objArrayHandle chunk) { 1393 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset)); 1394 assert(mirrors != NULL, "mirror array should be initialized in backtrace"); 1395 return mirrors; 1396 } 1397 static typeArrayOop get_cprefs(objArrayHandle chunk) { 1398 typeArrayOop cprefs = typeArrayOop(chunk->obj_at(trace_cprefs_offset)); 1399 assert(cprefs != NULL, "cprefs array should be initialized in backtrace"); 1400 return cprefs; 1401 } 1402 1403 // constructor for new backtrace 1404 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL), _cprefs(NULL) { 1405 expand(CHECK); 1406 _backtrace = _head; 1407 _index = 0; 1408 } 1409 1410 BacktraceBuilder(objArrayHandle backtrace) { 1411 _methods = get_methods(backtrace); 1412 _bcis = get_bcis(backtrace); 1413 _mirrors = get_mirrors(backtrace); 1414 _cprefs = get_cprefs(backtrace); 1415 assert(_methods->length() == _bcis->length() && 1416 _methods->length() == _mirrors->length(), 1417 "method and source information arrays should match"); 1418 1419 // head is the preallocated backtrace 1420 _backtrace = _head = backtrace(); 1421 _index = 0; 1422 } 1423 1424 void expand(TRAPS) { 1425 objArrayHandle old_head(THREAD, _head); 1426 Pause_No_Safepoint_Verifier pnsv(&_nsv); 1427 1428 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK); 1429 objArrayHandle new_head(THREAD, head); 1430 1431 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK); 1432 typeArrayHandle new_methods(THREAD, methods); 1433 1434 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK); 1435 typeArrayHandle new_bcis(THREAD, bcis); 1436 1437 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK); 1438 objArrayHandle new_mirrors(THREAD, mirrors); 1439 1440 typeArrayOop cprefs = oopFactory::new_shortArray(trace_chunk_size, CHECK); 1441 typeArrayHandle new_cprefs(THREAD, cprefs); 1442 1443 if (!old_head.is_null()) { 1444 old_head->obj_at_put(trace_next_offset, new_head()); 1445 } 1446 new_head->obj_at_put(trace_methods_offset, new_methods()); 1447 new_head->obj_at_put(trace_bcis_offset, new_bcis()); 1448 new_head->obj_at_put(trace_mirrors_offset, new_mirrors()); 1449 new_head->obj_at_put(trace_cprefs_offset, new_cprefs()); 1450 1451 _head = new_head(); 1452 _methods = new_methods(); 1453 _bcis = new_bcis(); 1454 _mirrors = new_mirrors(); 1455 _cprefs = new_cprefs(); 1456 _index = 0; 1457 } 1458 1459 oop backtrace() { 1460 return _backtrace(); 1461 } 1462 1463 inline void push(Method* method, int bci, TRAPS) { 1464 // Smear the -1 bci to 0 since the array only holds unsigned 1465 // shorts. The later line number lookup would just smear the -1 1466 // to a 0 even if it could be recorded. 1467 if (bci == SynchronizationEntryBCI) bci = 0; 1468 1469 if (_index >= trace_chunk_size) { 1470 methodHandle mhandle(THREAD, method); 1471 expand(CHECK); 1472 method = mhandle(); 1473 } 1474 1475 _methods->short_at_put(_index, method->orig_method_idnum()); 1476 _bcis->int_at_put(_index, merge_bci_and_version(bci, method->constants()->version())); 1477 _cprefs->short_at_put(_index, method->name_index()); 1478 1479 // We need to save the mirrors in the backtrace to keep the class 1480 // from being unloaded while we still have this stack trace. 1481 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror"); 1482 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror()); 1483 _index++; 1484 } 1485 1486 }; 1487 1488 Symbol* get_source_file_name(InstanceKlass* holder, int version) { 1489 // Find the specific ik version that contains this source_file_name_index 1490 // via the previous versions list, but use the current version's 1491 // constant pool to look it up. The previous version's index has been 1492 // merged for the current constant pool. 1493 InstanceKlass* ik = holder->get_klass_version(version); 1494 // This version has been cleaned up. 1495 if (ik == NULL) return NULL; 1496 int source_file_name_index = ik->source_file_name_index(); 1497 return (source_file_name_index == 0) ? 1498 (Symbol*)NULL : holder->constants()->symbol_at(source_file_name_index); 1499 } 1500 1501 // Print stack trace element to resource allocated buffer 1502 char* java_lang_Throwable::print_stack_element_to_buffer(Handle mirror, 1503 int method_id, int version, int bci, int cpref) { 1504 1505 // Get strings and string lengths 1506 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 1507 const char* klass_name = holder->external_name(); 1508 int buf_len = (int)strlen(klass_name); 1509 1510 Method* method = holder->method_with_orig_idnum(method_id, version); 1511 1512 // The method can be NULL if the requested class version is gone 1513 Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref); 1514 char* method_name = sym->as_C_string(); 1515 buf_len += (int)strlen(method_name); 1516 1517 char* source_file_name = NULL; 1518 Symbol* source = get_source_file_name(holder, version); 1519 if (source != NULL) { 1520 source_file_name = source->as_C_string(); 1521 buf_len += (int)strlen(source_file_name); 1522 } 1523 1524 // Allocate temporary buffer with extra space for formatting and line number 1525 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64); 1526 1527 // Print stack trace line in buffer 1528 sprintf(buf, "\tat %s.%s", klass_name, method_name); 1529 1530 if (!version_matches(method, version)) { 1531 strcat(buf, "(Redefined)"); 1532 } else { 1533 int line_number = get_line_number(method, bci); 1534 if (line_number == -2) { 1535 strcat(buf, "(Native Method)"); 1536 } else { 1537 if (source_file_name != NULL && (line_number != -1)) { 1538 // Sourcename and linenumber 1539 sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number); 1540 } else if (source_file_name != NULL) { 1541 // Just sourcename 1542 sprintf(buf + (int)strlen(buf), "(%s)", source_file_name); 1543 } else { 1544 // Neither sourcename nor linenumber 1545 sprintf(buf + (int)strlen(buf), "(Unknown Source)"); 1546 } 1547 nmethod* nm = method->code(); 1548 if (WizardMode && nm != NULL) { 1549 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm); 1550 } 1551 } 1552 } 1553 1554 return buf; 1555 } 1556 1557 void java_lang_Throwable::print_stack_element(outputStream *st, Handle mirror, 1558 int method_id, int version, int bci, int cpref) { 1559 ResourceMark rm; 1560 char* buf = print_stack_element_to_buffer(mirror, method_id, version, bci, cpref); 1561 st->print_cr("%s", buf); 1562 } 1563 1564 void java_lang_Throwable::print_stack_element(outputStream *st, methodHandle method, int bci) { 1565 Handle mirror = method->method_holder()->java_mirror(); 1566 int method_id = method->orig_method_idnum(); 1567 int version = method->constants()->version(); 1568 int cpref = method->name_index(); 1569 print_stack_element(st, mirror, method_id, version, bci, cpref); 1570 } 1571 1572 const char* java_lang_Throwable::no_stack_trace_message() { 1573 return "\t<<no stack trace available>>"; 1574 } 1575 1576 1577 // Currently used only for exceptions occurring during startup 1578 void java_lang_Throwable::print_stack_trace(oop throwable, outputStream* st) { 1579 Thread *THREAD = Thread::current(); 1580 Handle h_throwable(THREAD, throwable); 1581 while (h_throwable.not_null()) { 1582 objArrayHandle result (THREAD, objArrayOop(backtrace(h_throwable()))); 1583 if (result.is_null()) { 1584 st->print_raw_cr(no_stack_trace_message()); 1585 return; 1586 } 1587 1588 while (result.not_null()) { 1589 1590 // Get method id, bci, version and mirror from chunk 1591 typeArrayHandle methods (THREAD, BacktraceBuilder::get_methods(result)); 1592 typeArrayHandle bcis (THREAD, BacktraceBuilder::get_bcis(result)); 1593 objArrayHandle mirrors (THREAD, BacktraceBuilder::get_mirrors(result)); 1594 typeArrayHandle cprefs (THREAD, BacktraceBuilder::get_cprefs(result)); 1595 1596 int length = methods()->length(); 1597 for (int index = 0; index < length; index++) { 1598 Handle mirror(THREAD, mirrors->obj_at(index)); 1599 // NULL mirror means end of stack trace 1600 if (mirror.is_null()) goto handle_cause; 1601 int method = methods->short_at(index); 1602 int version = version_at(bcis->int_at(index)); 1603 int bci = bci_at(bcis->int_at(index)); 1604 int cpref = cprefs->short_at(index); 1605 print_stack_element(st, mirror, method, version, bci, cpref); 1606 } 1607 result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset))); 1608 } 1609 handle_cause: 1610 { 1611 EXCEPTION_MARK; 1612 JavaValue cause(T_OBJECT); 1613 JavaCalls::call_virtual(&cause, 1614 h_throwable, 1615 KlassHandle(THREAD, h_throwable->klass()), 1616 vmSymbols::getCause_name(), 1617 vmSymbols::void_throwable_signature(), 1618 THREAD); 1619 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 1620 if (HAS_PENDING_EXCEPTION) { 1621 CLEAR_PENDING_EXCEPTION; 1622 h_throwable = Handle(); 1623 } else { 1624 h_throwable = Handle(THREAD, (oop) cause.get_jobject()); 1625 if (h_throwable.not_null()) { 1626 st->print("Caused by: "); 1627 print(h_throwable, st); 1628 st->cr(); 1629 } 1630 } 1631 } 1632 } 1633 } 1634 1635 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS) { 1636 if (!StackTraceInThrowable) return; 1637 ResourceMark rm(THREAD); 1638 1639 // Start out by clearing the backtrace for this object, in case the VM 1640 // runs out of memory while allocating the stack trace 1641 set_backtrace(throwable(), NULL); 1642 // Clear lazily constructed Java level stacktrace if refilling occurs 1643 // This is unnecessary in 1.7+ but harmless 1644 clear_stacktrace(throwable()); 1645 1646 int max_depth = MaxJavaStackTraceDepth; 1647 JavaThread* thread = (JavaThread*)THREAD; 1648 BacktraceBuilder bt(CHECK); 1649 1650 // If there is no Java frame just return the method that was being called 1651 // with bci 0 1652 if (!thread->has_last_Java_frame()) { 1653 if (max_depth >= 1 && method() != NULL) { 1654 bt.push(method(), 0, CHECK); 1655 set_backtrace(throwable(), bt.backtrace()); 1656 } 1657 return; 1658 } 1659 1660 // Instead of using vframe directly, this version of fill_in_stack_trace 1661 // basically handles everything by hand. This significantly improved the 1662 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows. 1663 // See bug 6333838 for more details. 1664 // The "ASSERT" here is to verify this method generates the exactly same stack 1665 // trace as utilizing vframe. 1666 #ifdef ASSERT 1667 vframeStream st(thread); 1668 methodHandle st_method(THREAD, st.method()); 1669 #endif 1670 int total_count = 0; 1671 RegisterMap map(thread, false); 1672 int decode_offset = 0; 1673 nmethod* nm = NULL; 1674 bool skip_fillInStackTrace_check = false; 1675 bool skip_throwableInit_check = false; 1676 bool skip_hidden = !ShowHiddenFrames; 1677 1678 for (frame fr = thread->last_frame(); max_depth != total_count;) { 1679 Method* method = NULL; 1680 int bci = 0; 1681 1682 // Compiled java method case. 1683 if (decode_offset != 0) { 1684 DebugInfoReadStream stream(nm, decode_offset); 1685 decode_offset = stream.read_int(); 1686 method = (Method*)nm->metadata_at(stream.read_int()); 1687 bci = stream.read_bci(); 1688 } else { 1689 if (fr.is_first_frame()) break; 1690 address pc = fr.pc(); 1691 if (fr.is_interpreted_frame()) { 1692 address bcp = fr.interpreter_frame_bcp(); 1693 method = fr.interpreter_frame_method(); 1694 bci = method->bci_from(bcp); 1695 fr = fr.sender(&map); 1696 } else { 1697 CodeBlob* cb = fr.cb(); 1698 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL 1699 // but non nmethod 1700 fr = fr.sender(&map); 1701 if (cb == NULL || !cb->is_nmethod()) { 1702 continue; 1703 } 1704 nm = (nmethod*)cb; 1705 if (nm->method()->is_native()) { 1706 method = nm->method(); 1707 bci = 0; 1708 } else { 1709 PcDesc* pd = nm->pc_desc_at(pc); 1710 decode_offset = pd->scope_decode_offset(); 1711 // if decode_offset is not equal to 0, it will execute the 1712 // "compiled java method case" at the beginning of the loop. 1713 continue; 1714 } 1715 } 1716 } 1717 #ifdef ASSERT 1718 assert(st_method() == method && st.bci() == bci, 1719 "Wrong stack trace"); 1720 st.next(); 1721 // vframeStream::method isn't GC-safe so store off a copy 1722 // of the Method* in case we GC. 1723 if (!st.at_end()) { 1724 st_method = st.method(); 1725 } 1726 #endif 1727 1728 // the format of the stacktrace will be: 1729 // - 1 or more fillInStackTrace frames for the exception class (skipped) 1730 // - 0 or more <init> methods for the exception class (skipped) 1731 // - rest of the stack 1732 1733 if (!skip_fillInStackTrace_check) { 1734 if (method->name() == vmSymbols::fillInStackTrace_name() && 1735 throwable->is_a(method->method_holder())) { 1736 continue; 1737 } 1738 else { 1739 skip_fillInStackTrace_check = true; // gone past them all 1740 } 1741 } 1742 if (!skip_throwableInit_check) { 1743 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering"); 1744 1745 // skip <init> methods of the exception class and superclasses 1746 // This is simlar to classic VM. 1747 if (method->name() == vmSymbols::object_initializer_name() && 1748 throwable->is_a(method->method_holder())) { 1749 continue; 1750 } else { 1751 // there are none or we've seen them all - either way stop checking 1752 skip_throwableInit_check = true; 1753 } 1754 } 1755 if (method->is_hidden()) { 1756 if (skip_hidden) continue; 1757 } 1758 bt.push(method, bci, CHECK); 1759 total_count++; 1760 } 1761 1762 // Put completed stack trace into throwable object 1763 set_backtrace(throwable(), bt.backtrace()); 1764 } 1765 1766 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method) { 1767 // No-op if stack trace is disabled 1768 if (!StackTraceInThrowable) { 1769 return; 1770 } 1771 1772 // Disable stack traces for some preallocated out of memory errors 1773 if (!Universe::should_fill_in_stack_trace(throwable)) { 1774 return; 1775 } 1776 1777 PRESERVE_EXCEPTION_MARK; 1778 1779 JavaThread* thread = JavaThread::active(); 1780 fill_in_stack_trace(throwable, method, thread); 1781 // ignore exceptions thrown during stack trace filling 1782 CLEAR_PENDING_EXCEPTION; 1783 } 1784 1785 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 1786 // Allocate stack trace - backtrace is created but not filled in 1787 1788 // No-op if stack trace is disabled 1789 if (!StackTraceInThrowable) return; 1790 BacktraceBuilder bt(CHECK); // creates a backtrace 1791 set_backtrace(throwable(), bt.backtrace()); 1792 } 1793 1794 1795 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 1796 // Fill in stack trace into preallocated backtrace (no GC) 1797 1798 // No-op if stack trace is disabled 1799 if (!StackTraceInThrowable) return; 1800 1801 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check"); 1802 1803 JavaThread* THREAD = JavaThread::current(); 1804 1805 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable())); 1806 assert(backtrace.not_null(), "backtrace should have been preallocated"); 1807 1808 ResourceMark rm(THREAD); 1809 vframeStream st(THREAD); 1810 1811 BacktraceBuilder bt(backtrace); 1812 1813 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 1814 // methods as preallocated errors aren't created by "java" code. 1815 1816 // fill in as much stack trace as possible 1817 typeArrayOop methods = BacktraceBuilder::get_methods(backtrace); 1818 int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth); 1819 int chunk_count = 0; 1820 1821 for (;!st.at_end(); st.next()) { 1822 bt.push(st.method(), st.bci(), CHECK); 1823 chunk_count++; 1824 1825 // Bail-out for deep stacks 1826 if (chunk_count >= max_chunks) break; 1827 } 1828 1829 // We support the Throwable immutability protocol defined for Java 7. 1830 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace()); 1831 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized"); 1832 } 1833 1834 1835 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) { 1836 if (throwable == NULL) { 1837 THROW_0(vmSymbols::java_lang_NullPointerException()); 1838 } 1839 objArrayOop chunk = objArrayOop(backtrace(throwable)); 1840 int depth = 0; 1841 if (chunk != NULL) { 1842 // Iterate over chunks and count full ones 1843 while (true) { 1844 objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset)); 1845 if (next == NULL) break; 1846 depth += trace_chunk_size; 1847 chunk = next; 1848 } 1849 assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check"); 1850 // Count element in remaining partial chunk. NULL value for mirror 1851 // marks the end of the stack trace elements that are saved. 1852 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk); 1853 assert(mirrors != NULL, "sanity check"); 1854 for (int i = 0; i < mirrors->length(); i++) { 1855 if (mirrors->obj_at(i) == NULL) break; 1856 depth++; 1857 } 1858 } 1859 return depth; 1860 } 1861 1862 1863 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) { 1864 if (throwable == NULL) { 1865 THROW_0(vmSymbols::java_lang_NullPointerException()); 1866 } 1867 if (index < 0) { 1868 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 1869 } 1870 // Compute how many chunks to skip and index into actual chunk 1871 objArrayOop chunk = objArrayOop(backtrace(throwable)); 1872 int skip_chunks = index / trace_chunk_size; 1873 int chunk_index = index % trace_chunk_size; 1874 while (chunk != NULL && skip_chunks > 0) { 1875 chunk = objArrayOop(chunk->obj_at(trace_next_offset)); 1876 skip_chunks--; 1877 } 1878 if (chunk == NULL) { 1879 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 1880 } 1881 // Get method id, bci, version, mirror and cpref from chunk 1882 typeArrayOop methods = BacktraceBuilder::get_methods(chunk); 1883 typeArrayOop bcis = BacktraceBuilder::get_bcis(chunk); 1884 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk); 1885 typeArrayOop cprefs = BacktraceBuilder::get_cprefs(chunk); 1886 1887 assert(methods != NULL && bcis != NULL && mirrors != NULL, "sanity check"); 1888 1889 int method = methods->short_at(chunk_index); 1890 int version = version_at(bcis->int_at(chunk_index)); 1891 int bci = bci_at(bcis->int_at(chunk_index)); 1892 int cpref = cprefs->short_at(chunk_index); 1893 Handle mirror(THREAD, mirrors->obj_at(chunk_index)); 1894 1895 // Chunk can be partial full 1896 if (mirror.is_null()) { 1897 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 1898 } 1899 oop element = java_lang_StackTraceElement::create(mirror, method, version, bci, cpref, CHECK_0); 1900 return element; 1901 } 1902 1903 oop java_lang_StackTraceElement::create(Handle mirror, int method_id, 1904 int version, int bci, int cpref, TRAPS) { 1905 // Allocate java.lang.StackTraceElement instance 1906 Klass* k = SystemDictionary::StackTraceElement_klass(); 1907 assert(k != NULL, "must be loaded in 1.4+"); 1908 instanceKlassHandle ik (THREAD, k); 1909 if (ik->should_be_initialized()) { 1910 ik->initialize(CHECK_0); 1911 } 1912 1913 Handle element = ik->allocate_instance_handle(CHECK_0); 1914 // Fill in class name 1915 ResourceMark rm(THREAD); 1916 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 1917 const char* str = holder->external_name(); 1918 oop classname = StringTable::intern((char*) str, CHECK_0); 1919 java_lang_StackTraceElement::set_declaringClass(element(), classname); 1920 1921 Method* method = holder->method_with_orig_idnum(method_id, version); 1922 1923 // The method can be NULL if the requested class version is gone 1924 Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref); 1925 1926 // Fill in method name 1927 oop methodname = StringTable::intern(sym, CHECK_0); 1928 java_lang_StackTraceElement::set_methodName(element(), methodname); 1929 1930 if (!version_matches(method, version)) { 1931 // The method was redefined, accurate line number information isn't available 1932 java_lang_StackTraceElement::set_fileName(element(), NULL); 1933 java_lang_StackTraceElement::set_lineNumber(element(), -1); 1934 } else { 1935 // Fill in source file name and line number. 1936 Symbol* source = get_source_file_name(holder, version); 1937 if (ShowHiddenFrames && source == NULL) 1938 source = vmSymbols::unknown_class_name(); 1939 oop filename = StringTable::intern(source, CHECK_0); 1940 java_lang_StackTraceElement::set_fileName(element(), filename); 1941 1942 int line_number = get_line_number(method, bci); 1943 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 1944 } 1945 return element(); 1946 } 1947 1948 oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) { 1949 Handle mirror (THREAD, method->method_holder()->java_mirror()); 1950 int method_id = method->orig_method_idnum(); 1951 int cpref = method->name_index(); 1952 return create(mirror, method_id, method->constants()->version(), bci, cpref, THREAD); 1953 } 1954 1955 void java_lang_reflect_AccessibleObject::compute_offsets() { 1956 Klass* k = SystemDictionary::reflect_AccessibleObject_klass(); 1957 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature()); 1958 } 1959 1960 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 1961 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1962 return (jboolean) reflect->bool_field(override_offset); 1963 } 1964 1965 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 1966 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1967 reflect->bool_field_put(override_offset, (int) value); 1968 } 1969 1970 void java_lang_reflect_Method::compute_offsets() { 1971 Klass* k = SystemDictionary::reflect_Method_klass(); 1972 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 1973 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1974 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature()); 1975 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 1976 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 1977 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 1978 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 1979 // The generic signature and annotations fields are only present in 1.5 1980 signature_offset = -1; 1981 annotations_offset = -1; 1982 parameter_annotations_offset = -1; 1983 annotation_default_offset = -1; 1984 type_annotations_offset = -1; 1985 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 1986 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 1987 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 1988 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature()); 1989 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 1990 } 1991 1992 Handle java_lang_reflect_Method::create(TRAPS) { 1993 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1994 Klass* klass = SystemDictionary::reflect_Method_klass(); 1995 // This class is eagerly initialized during VM initialization, since we keep a refence 1996 // to one of the methods 1997 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized"); 1998 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD); 1999 } 2000 2001 oop java_lang_reflect_Method::clazz(oop reflect) { 2002 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2003 return reflect->obj_field(clazz_offset); 2004 } 2005 2006 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 2007 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2008 reflect->obj_field_put(clazz_offset, value); 2009 } 2010 2011 int java_lang_reflect_Method::slot(oop reflect) { 2012 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2013 return reflect->int_field(slot_offset); 2014 } 2015 2016 void java_lang_reflect_Method::set_slot(oop reflect, int value) { 2017 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2018 reflect->int_field_put(slot_offset, value); 2019 } 2020 2021 oop java_lang_reflect_Method::name(oop method) { 2022 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2023 return method->obj_field(name_offset); 2024 } 2025 2026 void java_lang_reflect_Method::set_name(oop method, oop value) { 2027 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2028 method->obj_field_put(name_offset, value); 2029 } 2030 2031 oop java_lang_reflect_Method::return_type(oop method) { 2032 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2033 return method->obj_field(returnType_offset); 2034 } 2035 2036 void java_lang_reflect_Method::set_return_type(oop method, oop value) { 2037 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2038 method->obj_field_put(returnType_offset, value); 2039 } 2040 2041 oop java_lang_reflect_Method::parameter_types(oop method) { 2042 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2043 return method->obj_field(parameterTypes_offset); 2044 } 2045 2046 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 2047 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2048 method->obj_field_put(parameterTypes_offset, value); 2049 } 2050 2051 oop java_lang_reflect_Method::exception_types(oop method) { 2052 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2053 return method->obj_field(exceptionTypes_offset); 2054 } 2055 2056 void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 2057 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2058 method->obj_field_put(exceptionTypes_offset, value); 2059 } 2060 2061 int java_lang_reflect_Method::modifiers(oop method) { 2062 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2063 return method->int_field(modifiers_offset); 2064 } 2065 2066 void java_lang_reflect_Method::set_modifiers(oop method, int value) { 2067 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2068 method->int_field_put(modifiers_offset, value); 2069 } 2070 2071 bool java_lang_reflect_Method::has_signature_field() { 2072 return (signature_offset >= 0); 2073 } 2074 2075 oop java_lang_reflect_Method::signature(oop method) { 2076 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2077 assert(has_signature_field(), "signature field must be present"); 2078 return method->obj_field(signature_offset); 2079 } 2080 2081 void java_lang_reflect_Method::set_signature(oop method, oop value) { 2082 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2083 assert(has_signature_field(), "signature field must be present"); 2084 method->obj_field_put(signature_offset, value); 2085 } 2086 2087 bool java_lang_reflect_Method::has_annotations_field() { 2088 return (annotations_offset >= 0); 2089 } 2090 2091 oop java_lang_reflect_Method::annotations(oop method) { 2092 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2093 assert(has_annotations_field(), "annotations field must be present"); 2094 return method->obj_field(annotations_offset); 2095 } 2096 2097 void java_lang_reflect_Method::set_annotations(oop method, oop value) { 2098 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2099 assert(has_annotations_field(), "annotations field must be present"); 2100 method->obj_field_put(annotations_offset, value); 2101 } 2102 2103 bool java_lang_reflect_Method::has_parameter_annotations_field() { 2104 return (parameter_annotations_offset >= 0); 2105 } 2106 2107 oop java_lang_reflect_Method::parameter_annotations(oop method) { 2108 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2109 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2110 return method->obj_field(parameter_annotations_offset); 2111 } 2112 2113 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 2114 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2115 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2116 method->obj_field_put(parameter_annotations_offset, value); 2117 } 2118 2119 bool java_lang_reflect_Method::has_annotation_default_field() { 2120 return (annotation_default_offset >= 0); 2121 } 2122 2123 oop java_lang_reflect_Method::annotation_default(oop method) { 2124 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2125 assert(has_annotation_default_field(), "annotation default field must be present"); 2126 return method->obj_field(annotation_default_offset); 2127 } 2128 2129 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 2130 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2131 assert(has_annotation_default_field(), "annotation default field must be present"); 2132 method->obj_field_put(annotation_default_offset, value); 2133 } 2134 2135 bool java_lang_reflect_Method::has_type_annotations_field() { 2136 return (type_annotations_offset >= 0); 2137 } 2138 2139 oop java_lang_reflect_Method::type_annotations(oop method) { 2140 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2141 assert(has_type_annotations_field(), "type_annotations field must be present"); 2142 return method->obj_field(type_annotations_offset); 2143 } 2144 2145 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) { 2146 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2147 assert(has_type_annotations_field(), "type_annotations field must be present"); 2148 method->obj_field_put(type_annotations_offset, value); 2149 } 2150 2151 void java_lang_reflect_Constructor::compute_offsets() { 2152 Klass* k = SystemDictionary::reflect_Constructor_klass(); 2153 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2154 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 2155 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 2156 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 2157 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2158 // The generic signature and annotations fields are only present in 1.5 2159 signature_offset = -1; 2160 annotations_offset = -1; 2161 parameter_annotations_offset = -1; 2162 type_annotations_offset = -1; 2163 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 2164 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 2165 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 2166 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 2167 } 2168 2169 Handle java_lang_reflect_Constructor::create(TRAPS) { 2170 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2171 Symbol* name = vmSymbols::java_lang_reflect_Constructor(); 2172 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2173 instanceKlassHandle klass (THREAD, k); 2174 // Ensure it is initialized 2175 klass->initialize(CHECK_NH); 2176 return klass->allocate_instance_handle(THREAD); 2177 } 2178 2179 oop java_lang_reflect_Constructor::clazz(oop reflect) { 2180 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2181 return reflect->obj_field(clazz_offset); 2182 } 2183 2184 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 2185 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2186 reflect->obj_field_put(clazz_offset, value); 2187 } 2188 2189 oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 2190 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2191 return constructor->obj_field(parameterTypes_offset); 2192 } 2193 2194 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 2195 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2196 constructor->obj_field_put(parameterTypes_offset, value); 2197 } 2198 2199 oop java_lang_reflect_Constructor::exception_types(oop constructor) { 2200 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2201 return constructor->obj_field(exceptionTypes_offset); 2202 } 2203 2204 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 2205 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2206 constructor->obj_field_put(exceptionTypes_offset, value); 2207 } 2208 2209 int java_lang_reflect_Constructor::slot(oop reflect) { 2210 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2211 return reflect->int_field(slot_offset); 2212 } 2213 2214 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 2215 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2216 reflect->int_field_put(slot_offset, value); 2217 } 2218 2219 int java_lang_reflect_Constructor::modifiers(oop constructor) { 2220 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2221 return constructor->int_field(modifiers_offset); 2222 } 2223 2224 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 2225 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2226 constructor->int_field_put(modifiers_offset, value); 2227 } 2228 2229 bool java_lang_reflect_Constructor::has_signature_field() { 2230 return (signature_offset >= 0); 2231 } 2232 2233 oop java_lang_reflect_Constructor::signature(oop constructor) { 2234 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2235 assert(has_signature_field(), "signature field must be present"); 2236 return constructor->obj_field(signature_offset); 2237 } 2238 2239 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 2240 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2241 assert(has_signature_field(), "signature field must be present"); 2242 constructor->obj_field_put(signature_offset, value); 2243 } 2244 2245 bool java_lang_reflect_Constructor::has_annotations_field() { 2246 return (annotations_offset >= 0); 2247 } 2248 2249 oop java_lang_reflect_Constructor::annotations(oop constructor) { 2250 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2251 assert(has_annotations_field(), "annotations field must be present"); 2252 return constructor->obj_field(annotations_offset); 2253 } 2254 2255 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 2256 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2257 assert(has_annotations_field(), "annotations field must be present"); 2258 constructor->obj_field_put(annotations_offset, value); 2259 } 2260 2261 bool java_lang_reflect_Constructor::has_parameter_annotations_field() { 2262 return (parameter_annotations_offset >= 0); 2263 } 2264 2265 oop java_lang_reflect_Constructor::parameter_annotations(oop method) { 2266 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2267 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2268 return method->obj_field(parameter_annotations_offset); 2269 } 2270 2271 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 2272 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2273 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2274 method->obj_field_put(parameter_annotations_offset, value); 2275 } 2276 2277 bool java_lang_reflect_Constructor::has_type_annotations_field() { 2278 return (type_annotations_offset >= 0); 2279 } 2280 2281 oop java_lang_reflect_Constructor::type_annotations(oop constructor) { 2282 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2283 assert(has_type_annotations_field(), "type_annotations field must be present"); 2284 return constructor->obj_field(type_annotations_offset); 2285 } 2286 2287 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) { 2288 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2289 assert(has_type_annotations_field(), "type_annotations field must be present"); 2290 constructor->obj_field_put(type_annotations_offset, value); 2291 } 2292 2293 void java_lang_reflect_Field::compute_offsets() { 2294 Klass* k = SystemDictionary::reflect_Field_klass(); 2295 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2296 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2297 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature()); 2298 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 2299 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2300 // The generic signature and annotations fields are only present in 1.5 2301 signature_offset = -1; 2302 annotations_offset = -1; 2303 type_annotations_offset = -1; 2304 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 2305 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 2306 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 2307 } 2308 2309 Handle java_lang_reflect_Field::create(TRAPS) { 2310 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2311 Symbol* name = vmSymbols::java_lang_reflect_Field(); 2312 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2313 instanceKlassHandle klass (THREAD, k); 2314 // Ensure it is initialized 2315 klass->initialize(CHECK_NH); 2316 return klass->allocate_instance_handle(THREAD); 2317 } 2318 2319 oop java_lang_reflect_Field::clazz(oop reflect) { 2320 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2321 return reflect->obj_field(clazz_offset); 2322 } 2323 2324 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 2325 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2326 reflect->obj_field_put(clazz_offset, value); 2327 } 2328 2329 oop java_lang_reflect_Field::name(oop field) { 2330 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2331 return field->obj_field(name_offset); 2332 } 2333 2334 void java_lang_reflect_Field::set_name(oop field, oop value) { 2335 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2336 field->obj_field_put(name_offset, value); 2337 } 2338 2339 oop java_lang_reflect_Field::type(oop field) { 2340 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2341 return field->obj_field(type_offset); 2342 } 2343 2344 void java_lang_reflect_Field::set_type(oop field, oop value) { 2345 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2346 field->obj_field_put(type_offset, value); 2347 } 2348 2349 int java_lang_reflect_Field::slot(oop reflect) { 2350 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2351 return reflect->int_field(slot_offset); 2352 } 2353 2354 void java_lang_reflect_Field::set_slot(oop reflect, int value) { 2355 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2356 reflect->int_field_put(slot_offset, value); 2357 } 2358 2359 int java_lang_reflect_Field::modifiers(oop field) { 2360 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2361 return field->int_field(modifiers_offset); 2362 } 2363 2364 void java_lang_reflect_Field::set_modifiers(oop field, int value) { 2365 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2366 field->int_field_put(modifiers_offset, value); 2367 } 2368 2369 bool java_lang_reflect_Field::has_signature_field() { 2370 return (signature_offset >= 0); 2371 } 2372 2373 oop java_lang_reflect_Field::signature(oop field) { 2374 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2375 assert(has_signature_field(), "signature field must be present"); 2376 return field->obj_field(signature_offset); 2377 } 2378 2379 void java_lang_reflect_Field::set_signature(oop field, oop value) { 2380 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2381 assert(has_signature_field(), "signature field must be present"); 2382 field->obj_field_put(signature_offset, value); 2383 } 2384 2385 bool java_lang_reflect_Field::has_annotations_field() { 2386 return (annotations_offset >= 0); 2387 } 2388 2389 oop java_lang_reflect_Field::annotations(oop field) { 2390 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2391 assert(has_annotations_field(), "annotations field must be present"); 2392 return field->obj_field(annotations_offset); 2393 } 2394 2395 void java_lang_reflect_Field::set_annotations(oop field, oop value) { 2396 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2397 assert(has_annotations_field(), "annotations field must be present"); 2398 field->obj_field_put(annotations_offset, value); 2399 } 2400 2401 bool java_lang_reflect_Field::has_type_annotations_field() { 2402 return (type_annotations_offset >= 0); 2403 } 2404 2405 oop java_lang_reflect_Field::type_annotations(oop field) { 2406 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2407 assert(has_type_annotations_field(), "type_annotations field must be present"); 2408 return field->obj_field(type_annotations_offset); 2409 } 2410 2411 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) { 2412 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2413 assert(has_type_annotations_field(), "type_annotations field must be present"); 2414 field->obj_field_put(type_annotations_offset, value); 2415 } 2416 2417 void sun_reflect_ConstantPool::compute_offsets() { 2418 Klass* k = SystemDictionary::reflect_ConstantPool_klass(); 2419 // This null test can be removed post beta 2420 if (k != NULL) { 2421 // The field is called ConstantPool* in the sun.reflect.ConstantPool class. 2422 compute_offset(_oop_offset, k, vmSymbols::ConstantPool_name(), vmSymbols::object_signature()); 2423 } 2424 } 2425 2426 void java_lang_reflect_Parameter::compute_offsets() { 2427 Klass* k = SystemDictionary::reflect_Parameter_klass(); 2428 if(NULL != k) { 2429 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2430 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2431 compute_offset(index_offset, k, vmSymbols::index_name(), vmSymbols::int_signature()); 2432 compute_offset(executable_offset, k, vmSymbols::executable_name(), vmSymbols::executable_signature()); 2433 } 2434 } 2435 2436 Handle java_lang_reflect_Parameter::create(TRAPS) { 2437 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2438 Symbol* name = vmSymbols::java_lang_reflect_Parameter(); 2439 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2440 instanceKlassHandle klass (THREAD, k); 2441 // Ensure it is initialized 2442 klass->initialize(CHECK_NH); 2443 return klass->allocate_instance_handle(THREAD); 2444 } 2445 2446 oop java_lang_reflect_Parameter::name(oop param) { 2447 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2448 return param->obj_field(name_offset); 2449 } 2450 2451 void java_lang_reflect_Parameter::set_name(oop param, oop value) { 2452 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2453 param->obj_field_put(name_offset, value); 2454 } 2455 2456 int java_lang_reflect_Parameter::modifiers(oop param) { 2457 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2458 return param->int_field(modifiers_offset); 2459 } 2460 2461 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) { 2462 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2463 param->int_field_put(modifiers_offset, value); 2464 } 2465 2466 int java_lang_reflect_Parameter::index(oop param) { 2467 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2468 return param->int_field(index_offset); 2469 } 2470 2471 void java_lang_reflect_Parameter::set_index(oop param, int value) { 2472 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2473 param->int_field_put(index_offset, value); 2474 } 2475 2476 oop java_lang_reflect_Parameter::executable(oop param) { 2477 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2478 return param->obj_field(executable_offset); 2479 } 2480 2481 void java_lang_reflect_Parameter::set_executable(oop param, oop value) { 2482 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2483 param->obj_field_put(executable_offset, value); 2484 } 2485 2486 2487 Handle sun_reflect_ConstantPool::create(TRAPS) { 2488 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2489 Klass* k = SystemDictionary::reflect_ConstantPool_klass(); 2490 instanceKlassHandle klass (THREAD, k); 2491 // Ensure it is initialized 2492 klass->initialize(CHECK_NH); 2493 return klass->allocate_instance_handle(THREAD); 2494 } 2495 2496 2497 void sun_reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) { 2498 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2499 oop mirror = value->pool_holder()->java_mirror(); 2500 // Save the mirror to get back the constant pool. 2501 reflect->obj_field_put(_oop_offset, mirror); 2502 } 2503 2504 ConstantPool* sun_reflect_ConstantPool::get_cp(oop reflect) { 2505 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2506 2507 oop mirror = reflect->obj_field(_oop_offset); 2508 Klass* k = java_lang_Class::as_Klass(mirror); 2509 assert(k->oop_is_instance(), "Must be"); 2510 2511 // Get the constant pool back from the klass. Since class redefinition 2512 // merges the new constant pool into the old, this is essentially the 2513 // same constant pool as the original. If constant pool merging is 2514 // no longer done in the future, this will have to change to save 2515 // the original. 2516 return InstanceKlass::cast(k)->constants(); 2517 } 2518 2519 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() { 2520 Klass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass(); 2521 // This null test can be removed post beta 2522 if (k != NULL) { 2523 compute_offset(_base_offset, k, 2524 vmSymbols::base_name(), vmSymbols::object_signature()); 2525 } 2526 } 2527 2528 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 2529 Klass* k = SystemDictionary::box_klass(type); 2530 if (k == NULL) return NULL; 2531 instanceKlassHandle h (THREAD, k); 2532 if (!h->is_initialized()) h->initialize(CHECK_0); 2533 return h->allocate_instance(THREAD); 2534 } 2535 2536 2537 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 2538 oop box = initialize_and_allocate(type, CHECK_0); 2539 if (box == NULL) return NULL; 2540 switch (type) { 2541 case T_BOOLEAN: 2542 box->bool_field_put(value_offset, value->z); 2543 break; 2544 case T_CHAR: 2545 box->char_field_put(value_offset, value->c); 2546 break; 2547 case T_FLOAT: 2548 box->float_field_put(value_offset, value->f); 2549 break; 2550 case T_DOUBLE: 2551 box->double_field_put(long_value_offset, value->d); 2552 break; 2553 case T_BYTE: 2554 box->byte_field_put(value_offset, value->b); 2555 break; 2556 case T_SHORT: 2557 box->short_field_put(value_offset, value->s); 2558 break; 2559 case T_INT: 2560 box->int_field_put(value_offset, value->i); 2561 break; 2562 case T_LONG: 2563 box->long_field_put(long_value_offset, value->j); 2564 break; 2565 default: 2566 return NULL; 2567 } 2568 return box; 2569 } 2570 2571 2572 BasicType java_lang_boxing_object::basic_type(oop box) { 2573 if (box == NULL) return T_ILLEGAL; 2574 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2575 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 2576 return T_ILLEGAL; 2577 return type; 2578 } 2579 2580 2581 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 2582 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2583 switch (type) { 2584 case T_BOOLEAN: 2585 value->z = box->bool_field(value_offset); 2586 break; 2587 case T_CHAR: 2588 value->c = box->char_field(value_offset); 2589 break; 2590 case T_FLOAT: 2591 value->f = box->float_field(value_offset); 2592 break; 2593 case T_DOUBLE: 2594 value->d = box->double_field(long_value_offset); 2595 break; 2596 case T_BYTE: 2597 value->b = box->byte_field(value_offset); 2598 break; 2599 case T_SHORT: 2600 value->s = box->short_field(value_offset); 2601 break; 2602 case T_INT: 2603 value->i = box->int_field(value_offset); 2604 break; 2605 case T_LONG: 2606 value->j = box->long_field(long_value_offset); 2607 break; 2608 default: 2609 return T_ILLEGAL; 2610 } // end switch 2611 return type; 2612 } 2613 2614 2615 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 2616 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2617 switch (type) { 2618 case T_BOOLEAN: 2619 box->bool_field_put(value_offset, value->z); 2620 break; 2621 case T_CHAR: 2622 box->char_field_put(value_offset, value->c); 2623 break; 2624 case T_FLOAT: 2625 box->float_field_put(value_offset, value->f); 2626 break; 2627 case T_DOUBLE: 2628 box->double_field_put(long_value_offset, value->d); 2629 break; 2630 case T_BYTE: 2631 box->byte_field_put(value_offset, value->b); 2632 break; 2633 case T_SHORT: 2634 box->short_field_put(value_offset, value->s); 2635 break; 2636 case T_INT: 2637 box->int_field_put(value_offset, value->i); 2638 break; 2639 case T_LONG: 2640 box->long_field_put(long_value_offset, value->j); 2641 break; 2642 default: 2643 return T_ILLEGAL; 2644 } // end switch 2645 return type; 2646 } 2647 2648 2649 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) { 2650 switch (type) { 2651 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break; 2652 case T_CHAR: st->print("%d", value->c); break; 2653 case T_BYTE: st->print("%d", value->b); break; 2654 case T_SHORT: st->print("%d", value->s); break; 2655 case T_INT: st->print("%d", value->i); break; 2656 case T_LONG: st->print(INT64_FORMAT, value->j); break; 2657 case T_FLOAT: st->print("%f", value->f); break; 2658 case T_DOUBLE: st->print("%lf", value->d); break; 2659 default: st->print("type %d?", type); break; 2660 } 2661 } 2662 2663 2664 // Support for java_lang_ref_Reference 2665 HeapWord *java_lang_ref_Reference::pending_list_lock_addr() { 2666 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass()); 2667 address addr = ik->static_field_addr(static_lock_offset); 2668 return (HeapWord*) addr; 2669 } 2670 2671 oop java_lang_ref_Reference::pending_list_lock() { 2672 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass()); 2673 address addr = ik->static_field_addr(static_lock_offset); 2674 if (UseCompressedOops) { 2675 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 2676 } else { 2677 return oopDesc::load_decode_heap_oop((oop*)addr); 2678 } 2679 } 2680 2681 HeapWord *java_lang_ref_Reference::pending_list_addr() { 2682 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass()); 2683 address addr = ik->static_field_addr(static_pending_offset); 2684 // XXX This might not be HeapWord aligned, almost rather be char *. 2685 return (HeapWord*)addr; 2686 } 2687 2688 oop java_lang_ref_Reference::pending_list() { 2689 char *addr = (char *)pending_list_addr(); 2690 if (UseCompressedOops) { 2691 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 2692 } else { 2693 return oopDesc::load_decode_heap_oop((oop*)addr); 2694 } 2695 } 2696 2697 2698 // Support for java_lang_ref_SoftReference 2699 2700 jlong java_lang_ref_SoftReference::timestamp(oop ref) { 2701 return ref->long_field(timestamp_offset); 2702 } 2703 2704 jlong java_lang_ref_SoftReference::clock() { 2705 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass()); 2706 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset); 2707 return *offset; 2708 } 2709 2710 void java_lang_ref_SoftReference::set_clock(jlong value) { 2711 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass()); 2712 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset); 2713 *offset = value; 2714 } 2715 2716 // Support for java_lang_invoke_DirectMethodHandle 2717 2718 int java_lang_invoke_DirectMethodHandle::_member_offset; 2719 2720 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) { 2721 oop member_name = NULL; 2722 bool is_dmh = dmh->is_oop() && java_lang_invoke_DirectMethodHandle::is_instance(dmh); 2723 assert(is_dmh, "a DirectMethodHandle oop is expected"); 2724 if (is_dmh) { 2725 member_name = dmh->obj_field(member_offset_in_bytes()); 2726 } 2727 return member_name; 2728 } 2729 2730 void java_lang_invoke_DirectMethodHandle::compute_offsets() { 2731 Klass* klass_oop = SystemDictionary::DirectMethodHandle_klass(); 2732 if (klass_oop != NULL) { 2733 compute_offset(_member_offset, klass_oop, vmSymbols::member_name(), vmSymbols::java_lang_invoke_MemberName_signature()); 2734 } 2735 } 2736 2737 // Support for java_lang_invoke_MethodHandle 2738 2739 int java_lang_invoke_MethodHandle::_type_offset; 2740 int java_lang_invoke_MethodHandle::_form_offset; 2741 2742 int java_lang_invoke_MemberName::_clazz_offset; 2743 int java_lang_invoke_MemberName::_name_offset; 2744 int java_lang_invoke_MemberName::_type_offset; 2745 int java_lang_invoke_MemberName::_flags_offset; 2746 int java_lang_invoke_MemberName::_vmtarget_offset; 2747 int java_lang_invoke_MemberName::_vmloader_offset; 2748 int java_lang_invoke_MemberName::_vmindex_offset; 2749 2750 int java_lang_invoke_LambdaForm::_vmentry_offset; 2751 2752 void java_lang_invoke_MethodHandle::compute_offsets() { 2753 Klass* klass_oop = SystemDictionary::MethodHandle_klass(); 2754 if (klass_oop != NULL) { 2755 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature()); 2756 compute_offset(_form_offset, klass_oop, vmSymbols::form_name(), vmSymbols::java_lang_invoke_LambdaForm_signature()); 2757 } 2758 } 2759 2760 void java_lang_invoke_MemberName::compute_offsets() { 2761 Klass* klass_oop = SystemDictionary::MemberName_klass(); 2762 if (klass_oop != NULL) { 2763 compute_offset(_clazz_offset, klass_oop, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2764 compute_offset(_name_offset, klass_oop, vmSymbols::name_name(), vmSymbols::string_signature()); 2765 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::object_signature()); 2766 compute_offset(_flags_offset, klass_oop, vmSymbols::flags_name(), vmSymbols::int_signature()); 2767 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 2768 } 2769 } 2770 2771 void java_lang_invoke_LambdaForm::compute_offsets() { 2772 Klass* klass_oop = SystemDictionary::LambdaForm_klass(); 2773 if (klass_oop != NULL) { 2774 compute_offset(_vmentry_offset, klass_oop, vmSymbols::vmentry_name(), vmSymbols::java_lang_invoke_MemberName_signature()); 2775 } 2776 } 2777 2778 bool java_lang_invoke_LambdaForm::is_instance(oop obj) { 2779 return obj != NULL && is_subclass(obj->klass()); 2780 } 2781 2782 2783 oop java_lang_invoke_MethodHandle::type(oop mh) { 2784 return mh->obj_field(_type_offset); 2785 } 2786 2787 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) { 2788 mh->obj_field_put(_type_offset, mtype); 2789 } 2790 2791 oop java_lang_invoke_MethodHandle::form(oop mh) { 2792 assert(_form_offset != 0, ""); 2793 return mh->obj_field(_form_offset); 2794 } 2795 2796 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) { 2797 assert(_form_offset != 0, ""); 2798 mh->obj_field_put(_form_offset, lform); 2799 } 2800 2801 /// MemberName accessors 2802 2803 oop java_lang_invoke_MemberName::clazz(oop mname) { 2804 assert(is_instance(mname), "wrong type"); 2805 return mname->obj_field(_clazz_offset); 2806 } 2807 2808 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) { 2809 assert(is_instance(mname), "wrong type"); 2810 mname->obj_field_put(_clazz_offset, clazz); 2811 } 2812 2813 oop java_lang_invoke_MemberName::name(oop mname) { 2814 assert(is_instance(mname), "wrong type"); 2815 return mname->obj_field(_name_offset); 2816 } 2817 2818 void java_lang_invoke_MemberName::set_name(oop mname, oop name) { 2819 assert(is_instance(mname), "wrong type"); 2820 mname->obj_field_put(_name_offset, name); 2821 } 2822 2823 oop java_lang_invoke_MemberName::type(oop mname) { 2824 assert(is_instance(mname), "wrong type"); 2825 return mname->obj_field(_type_offset); 2826 } 2827 2828 void java_lang_invoke_MemberName::set_type(oop mname, oop type) { 2829 assert(is_instance(mname), "wrong type"); 2830 mname->obj_field_put(_type_offset, type); 2831 } 2832 2833 int java_lang_invoke_MemberName::flags(oop mname) { 2834 assert(is_instance(mname), "wrong type"); 2835 return mname->int_field(_flags_offset); 2836 } 2837 2838 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) { 2839 assert(is_instance(mname), "wrong type"); 2840 mname->int_field_put(_flags_offset, flags); 2841 } 2842 2843 Metadata* java_lang_invoke_MemberName::vmtarget(oop mname) { 2844 assert(is_instance(mname), "wrong type"); 2845 return (Metadata*)mname->address_field(_vmtarget_offset); 2846 } 2847 2848 bool java_lang_invoke_MemberName::is_method(oop mname) { 2849 assert(is_instance(mname), "must be MemberName"); 2850 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0; 2851 } 2852 2853 void java_lang_invoke_MemberName::set_vmtarget(oop mname, Metadata* ref) { 2854 assert(is_instance(mname), "wrong type"); 2855 // check the type of the vmtarget 2856 oop dependency = NULL; 2857 if (ref != NULL) { 2858 switch (flags(mname) & (MN_IS_METHOD | 2859 MN_IS_CONSTRUCTOR | 2860 MN_IS_FIELD)) { 2861 case MN_IS_METHOD: 2862 case MN_IS_CONSTRUCTOR: 2863 assert(ref->is_method(), "should be a method"); 2864 dependency = ((Method*)ref)->method_holder()->java_mirror(); 2865 break; 2866 case MN_IS_FIELD: 2867 assert(ref->is_klass(), "should be a class"); 2868 dependency = ((Klass*)ref)->java_mirror(); 2869 break; 2870 default: 2871 ShouldNotReachHere(); 2872 } 2873 } 2874 mname->address_field_put(_vmtarget_offset, (address)ref); 2875 // Add a reference to the loader (actually mirror because anonymous classes will not have 2876 // distinct loaders) to ensure the metadata is kept alive 2877 // This mirror may be different than the one in clazz field. 2878 mname->obj_field_put(_vmloader_offset, dependency); 2879 } 2880 2881 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) { 2882 assert(is_instance(mname), "wrong type"); 2883 return (intptr_t) mname->address_field(_vmindex_offset); 2884 } 2885 2886 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) { 2887 assert(is_instance(mname), "wrong type"); 2888 mname->address_field_put(_vmindex_offset, (address) index); 2889 } 2890 2891 oop java_lang_invoke_LambdaForm::vmentry(oop lform) { 2892 assert(is_instance(lform), "wrong type"); 2893 return lform->obj_field(_vmentry_offset); 2894 } 2895 2896 2897 // Support for java_lang_invoke_MethodType 2898 2899 int java_lang_invoke_MethodType::_rtype_offset; 2900 int java_lang_invoke_MethodType::_ptypes_offset; 2901 2902 void java_lang_invoke_MethodType::compute_offsets() { 2903 Klass* k = SystemDictionary::MethodType_klass(); 2904 if (k != NULL) { 2905 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature()); 2906 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature()); 2907 } 2908 } 2909 2910 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) { 2911 st->print("("); 2912 objArrayOop pts = ptypes(mt); 2913 for (int i = 0, limit = pts->length(); i < limit; i++) { 2914 java_lang_Class::print_signature(pts->obj_at(i), st); 2915 } 2916 st->print(")"); 2917 java_lang_Class::print_signature(rtype(mt), st); 2918 } 2919 2920 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) { 2921 ResourceMark rm; 2922 stringStream buffer(128); 2923 print_signature(mt, &buffer); 2924 const char* sigstr = buffer.base(); 2925 int siglen = (int) buffer.size(); 2926 Symbol *name; 2927 if (!intern_if_not_found) { 2928 name = SymbolTable::probe(sigstr, siglen); 2929 } else { 2930 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 2931 } 2932 return name; 2933 } 2934 2935 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) { 2936 if (mt1 == mt2) 2937 return true; 2938 if (rtype(mt1) != rtype(mt2)) 2939 return false; 2940 if (ptype_count(mt1) != ptype_count(mt2)) 2941 return false; 2942 for (int i = ptype_count(mt1) - 1; i >= 0; i--) { 2943 if (ptype(mt1, i) != ptype(mt2, i)) 2944 return false; 2945 } 2946 return true; 2947 } 2948 2949 oop java_lang_invoke_MethodType::rtype(oop mt) { 2950 assert(is_instance(mt), "must be a MethodType"); 2951 return mt->obj_field(_rtype_offset); 2952 } 2953 2954 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) { 2955 assert(is_instance(mt), "must be a MethodType"); 2956 return (objArrayOop) mt->obj_field(_ptypes_offset); 2957 } 2958 2959 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) { 2960 return ptypes(mt)->obj_at(idx); 2961 } 2962 2963 int java_lang_invoke_MethodType::ptype_count(oop mt) { 2964 return ptypes(mt)->length(); 2965 } 2966 2967 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) { 2968 objArrayOop pts = ptypes(mt); 2969 int count = pts->length(); 2970 int slots = 0; 2971 for (int i = 0; i < count; i++) { 2972 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i)); 2973 slots += type2size[bt]; 2974 } 2975 return slots; 2976 } 2977 2978 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) { 2979 BasicType bt = java_lang_Class::as_BasicType(rtype(mt)); 2980 return type2size[bt]; 2981 } 2982 2983 2984 // Support for java_lang_invoke_CallSite 2985 2986 int java_lang_invoke_CallSite::_target_offset; 2987 int java_lang_invoke_CallSite::_context_offset; 2988 2989 void java_lang_invoke_CallSite::compute_offsets() { 2990 Klass* k = SystemDictionary::CallSite_klass(); 2991 if (k != NULL) { 2992 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature()); 2993 compute_offset(_context_offset, k, vmSymbols::context_name(), 2994 vmSymbols::java_lang_invoke_MethodHandleNatives_CallSiteContext_signature()); 2995 } 2996 } 2997 2998 oop java_lang_invoke_CallSite::context(oop call_site) { 2999 assert(java_lang_invoke_CallSite::is_instance(call_site), ""); 3000 3001 oop dep_oop = call_site->obj_field(_context_offset); 3002 return dep_oop; 3003 } 3004 3005 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext 3006 3007 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset; 3008 3009 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() { 3010 Klass* k = SystemDictionary::Context_klass(); 3011 if (k != NULL) { 3012 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3013 } 3014 } 3015 3016 nmethodBucket* java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) { 3017 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), ""); 3018 return (nmethodBucket*) (address) call_site->long_field(_vmdependencies_offset); 3019 } 3020 3021 void java_lang_invoke_MethodHandleNatives_CallSiteContext::set_vmdependencies(oop call_site, nmethodBucket* context) { 3022 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), ""); 3023 call_site->long_field_put(_vmdependencies_offset, (jlong) (address) context); 3024 } 3025 3026 // Support for java_security_AccessControlContext 3027 3028 int java_security_AccessControlContext::_context_offset = 0; 3029 int java_security_AccessControlContext::_privilegedContext_offset = 0; 3030 int java_security_AccessControlContext::_isPrivileged_offset = 0; 3031 int java_security_AccessControlContext::_isAuthorized_offset = -1; 3032 3033 void java_security_AccessControlContext::compute_offsets() { 3034 assert(_isPrivileged_offset == 0, "offsets should be initialized only once"); 3035 fieldDescriptor fd; 3036 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass()); 3037 3038 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) { 3039 fatal("Invalid layout of java.security.AccessControlContext"); 3040 } 3041 _context_offset = fd.offset(); 3042 3043 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) { 3044 fatal("Invalid layout of java.security.AccessControlContext"); 3045 } 3046 _privilegedContext_offset = fd.offset(); 3047 3048 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) { 3049 fatal("Invalid layout of java.security.AccessControlContext"); 3050 } 3051 _isPrivileged_offset = fd.offset(); 3052 3053 // The offset may not be present for bootstrapping with older JDK. 3054 if (ik->find_local_field(vmSymbols::isAuthorized_name(), vmSymbols::bool_signature(), &fd)) { 3055 _isAuthorized_offset = fd.offset(); 3056 } 3057 } 3058 3059 3060 bool java_security_AccessControlContext::is_authorized(Handle context) { 3061 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type"); 3062 assert(_isAuthorized_offset != -1, "should be set"); 3063 return context->bool_field(_isAuthorized_offset) != 0; 3064 } 3065 3066 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) { 3067 assert(_isPrivileged_offset != 0, "offsets should have been initialized"); 3068 // Ensure klass is initialized 3069 InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->initialize(CHECK_0); 3070 // Allocate result 3071 oop result = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->allocate_instance(CHECK_0); 3072 // Fill in values 3073 result->obj_field_put(_context_offset, context()); 3074 result->obj_field_put(_privilegedContext_offset, privileged_context()); 3075 result->bool_field_put(_isPrivileged_offset, isPrivileged); 3076 // whitelist AccessControlContexts created by the JVM if present 3077 if (_isAuthorized_offset != -1) { 3078 result->bool_field_put(_isAuthorized_offset, true); 3079 } 3080 return result; 3081 } 3082 3083 3084 // Support for java_lang_ClassLoader 3085 3086 bool java_lang_ClassLoader::offsets_computed = false; 3087 int java_lang_ClassLoader::_loader_data_offset = -1; 3088 int java_lang_ClassLoader::parallelCapable_offset = -1; 3089 3090 ClassLoaderData** java_lang_ClassLoader::loader_data_addr(oop loader) { 3091 assert(loader != NULL && loader->is_oop(), "loader must be oop"); 3092 return (ClassLoaderData**) loader->address_field_addr(_loader_data_offset); 3093 } 3094 3095 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) { 3096 return *java_lang_ClassLoader::loader_data_addr(loader); 3097 } 3098 3099 void java_lang_ClassLoader::compute_offsets() { 3100 assert(!offsets_computed, "offsets should be initialized only once"); 3101 offsets_computed = true; 3102 3103 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7, 3104 Klass* k1 = SystemDictionary::ClassLoader_klass(); 3105 compute_optional_offset(parallelCapable_offset, 3106 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature()); 3107 3108 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3109 } 3110 3111 oop java_lang_ClassLoader::parent(oop loader) { 3112 assert(is_instance(loader), "loader must be oop"); 3113 return loader->obj_field(parent_offset); 3114 } 3115 3116 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) { 3117 assert(is_instance(loader), "loader must be oop"); 3118 assert(cl == NULL || is_instance(cl), "cl argument must be oop"); 3119 oop acl = loader; 3120 debug_only(jint loop_count = 0); 3121 // This loop taken verbatim from ClassLoader.java: 3122 do { 3123 acl = parent(acl); 3124 if (cl == acl) { 3125 return true; 3126 } 3127 assert(++loop_count > 0, "loop_count overflow"); 3128 } while (acl != NULL); 3129 return false; 3130 } 3131 3132 bool java_lang_ClassLoader::is_instance(oop obj) { 3133 return obj != NULL && is_subclass(obj->klass()); 3134 } 3135 3136 3137 // For class loader classes, parallelCapable defined 3138 // based on non-null field 3139 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it 3140 bool java_lang_ClassLoader::parallelCapable(oop class_loader) { 3141 if (parallelCapable_offset == -1) { 3142 // Default for backward compatibility is false 3143 return false; 3144 } 3145 return (class_loader->obj_field(parallelCapable_offset) != NULL); 3146 } 3147 3148 bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 3149 // Fix for 4474172; see evaluation for more details 3150 loader = non_reflection_class_loader(loader); 3151 3152 oop cl = SystemDictionary::java_system_loader(); 3153 while(cl != NULL) { 3154 if (cl == loader) return true; 3155 cl = parent(cl); 3156 } 3157 return false; 3158 } 3159 3160 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) { 3161 if (loader != NULL) { 3162 // See whether this is one of the class loaders associated with 3163 // the generated bytecodes for reflection, and if so, "magically" 3164 // delegate to its parent to prevent class loading from occurring 3165 // in places where applications using reflection didn't expect it. 3166 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass(); 3167 // This might be null in non-1.4 JDKs 3168 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) { 3169 return parent(loader); 3170 } 3171 } 3172 return loader; 3173 } 3174 3175 3176 // Support for java_lang_System 3177 int java_lang_System::in_offset_in_bytes() { 3178 return (InstanceMirrorKlass::offset_of_static_fields() + static_in_offset); 3179 } 3180 3181 3182 int java_lang_System::out_offset_in_bytes() { 3183 return (InstanceMirrorKlass::offset_of_static_fields() + static_out_offset); 3184 } 3185 3186 3187 int java_lang_System::err_offset_in_bytes() { 3188 return (InstanceMirrorKlass::offset_of_static_fields() + static_err_offset); 3189 } 3190 3191 3192 bool java_lang_System::has_security_manager() { 3193 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::System_klass()); 3194 address addr = ik->static_field_addr(static_security_offset); 3195 if (UseCompressedOops) { 3196 return oopDesc::load_decode_heap_oop((narrowOop *)addr) != NULL; 3197 } else { 3198 return oopDesc::load_decode_heap_oop((oop*)addr) != NULL; 3199 } 3200 } 3201 3202 int java_lang_Class::_klass_offset; 3203 int java_lang_Class::_array_klass_offset; 3204 int java_lang_Class::_oop_size_offset; 3205 int java_lang_Class::_static_oop_field_count_offset; 3206 int java_lang_Class::_class_loader_offset; 3207 int java_lang_Class::_protection_domain_offset; 3208 int java_lang_Class::_component_mirror_offset; 3209 int java_lang_Class::_init_lock_offset; 3210 int java_lang_Class::_signers_offset; 3211 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL; 3212 int java_lang_Throwable::backtrace_offset; 3213 int java_lang_Throwable::detailMessage_offset; 3214 int java_lang_Throwable::cause_offset; 3215 int java_lang_Throwable::stackTrace_offset; 3216 int java_lang_Throwable::static_unassigned_stacktrace_offset; 3217 int java_lang_reflect_AccessibleObject::override_offset; 3218 int java_lang_reflect_Method::clazz_offset; 3219 int java_lang_reflect_Method::name_offset; 3220 int java_lang_reflect_Method::returnType_offset; 3221 int java_lang_reflect_Method::parameterTypes_offset; 3222 int java_lang_reflect_Method::exceptionTypes_offset; 3223 int java_lang_reflect_Method::slot_offset; 3224 int java_lang_reflect_Method::modifiers_offset; 3225 int java_lang_reflect_Method::signature_offset; 3226 int java_lang_reflect_Method::annotations_offset; 3227 int java_lang_reflect_Method::parameter_annotations_offset; 3228 int java_lang_reflect_Method::annotation_default_offset; 3229 int java_lang_reflect_Method::type_annotations_offset; 3230 int java_lang_reflect_Constructor::clazz_offset; 3231 int java_lang_reflect_Constructor::parameterTypes_offset; 3232 int java_lang_reflect_Constructor::exceptionTypes_offset; 3233 int java_lang_reflect_Constructor::slot_offset; 3234 int java_lang_reflect_Constructor::modifiers_offset; 3235 int java_lang_reflect_Constructor::signature_offset; 3236 int java_lang_reflect_Constructor::annotations_offset; 3237 int java_lang_reflect_Constructor::parameter_annotations_offset; 3238 int java_lang_reflect_Constructor::type_annotations_offset; 3239 int java_lang_reflect_Field::clazz_offset; 3240 int java_lang_reflect_Field::name_offset; 3241 int java_lang_reflect_Field::type_offset; 3242 int java_lang_reflect_Field::slot_offset; 3243 int java_lang_reflect_Field::modifiers_offset; 3244 int java_lang_reflect_Field::signature_offset; 3245 int java_lang_reflect_Field::annotations_offset; 3246 int java_lang_reflect_Field::type_annotations_offset; 3247 int java_lang_reflect_Parameter::name_offset; 3248 int java_lang_reflect_Parameter::modifiers_offset; 3249 int java_lang_reflect_Parameter::index_offset; 3250 int java_lang_reflect_Parameter::executable_offset; 3251 int java_lang_boxing_object::value_offset; 3252 int java_lang_boxing_object::long_value_offset; 3253 int java_lang_ref_Reference::referent_offset; 3254 int java_lang_ref_Reference::queue_offset; 3255 int java_lang_ref_Reference::next_offset; 3256 int java_lang_ref_Reference::discovered_offset; 3257 int java_lang_ref_Reference::static_lock_offset; 3258 int java_lang_ref_Reference::static_pending_offset; 3259 int java_lang_ref_Reference::number_of_fake_oop_fields; 3260 int java_lang_ref_SoftReference::timestamp_offset; 3261 int java_lang_ref_SoftReference::static_clock_offset; 3262 int java_lang_ClassLoader::parent_offset; 3263 int java_lang_System::static_in_offset; 3264 int java_lang_System::static_out_offset; 3265 int java_lang_System::static_err_offset; 3266 int java_lang_System::static_security_offset; 3267 int java_lang_StackTraceElement::declaringClass_offset; 3268 int java_lang_StackTraceElement::methodName_offset; 3269 int java_lang_StackTraceElement::fileName_offset; 3270 int java_lang_StackTraceElement::lineNumber_offset; 3271 int java_lang_AssertionStatusDirectives::classes_offset; 3272 int java_lang_AssertionStatusDirectives::classEnabled_offset; 3273 int java_lang_AssertionStatusDirectives::packages_offset; 3274 int java_lang_AssertionStatusDirectives::packageEnabled_offset; 3275 int java_lang_AssertionStatusDirectives::deflt_offset; 3276 int java_nio_Buffer::_limit_offset; 3277 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0; 3278 int sun_reflect_ConstantPool::_oop_offset; 3279 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset; 3280 3281 3282 // Support for java_lang_StackTraceElement 3283 3284 void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 3285 element->obj_field_put(fileName_offset, value); 3286 } 3287 3288 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 3289 element->obj_field_put(declaringClass_offset, value); 3290 } 3291 3292 void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 3293 element->obj_field_put(methodName_offset, value); 3294 } 3295 3296 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 3297 element->int_field_put(lineNumber_offset, value); 3298 } 3299 3300 3301 // Support for java Assertions - java_lang_AssertionStatusDirectives. 3302 3303 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 3304 o->obj_field_put(classes_offset, val); 3305 } 3306 3307 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 3308 o->obj_field_put(classEnabled_offset, val); 3309 } 3310 3311 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 3312 o->obj_field_put(packages_offset, val); 3313 } 3314 3315 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 3316 o->obj_field_put(packageEnabled_offset, val); 3317 } 3318 3319 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 3320 o->bool_field_put(deflt_offset, val); 3321 } 3322 3323 3324 // Support for intrinsification of java.nio.Buffer.checkIndex 3325 int java_nio_Buffer::limit_offset() { 3326 return _limit_offset; 3327 } 3328 3329 3330 void java_nio_Buffer::compute_offsets() { 3331 Klass* k = SystemDictionary::nio_Buffer_klass(); 3332 assert(k != NULL, "must be loaded in 1.4+"); 3333 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature()); 3334 } 3335 3336 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) { 3337 if (_owner_offset != 0) return; 3338 3339 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK); 3340 Klass* k = SystemDictionary::abstract_ownable_synchronizer_klass(); 3341 compute_offset(_owner_offset, k, 3342 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature()); 3343 } 3344 3345 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 3346 assert(_owner_offset != 0, "Must be initialized"); 3347 return obj->obj_field(_owner_offset); 3348 } 3349 3350 // Compute hard-coded offsets 3351 // Invoked before SystemDictionary::initialize, so pre-loaded classes 3352 // are not available to determine the offset_of_static_fields. 3353 void JavaClasses::compute_hard_coded_offsets() { 3354 const int x = heapOopSize; 3355 const int header = instanceOopDesc::base_offset_in_bytes(); 3356 3357 // Throwable Class 3358 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header; 3359 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header; 3360 java_lang_Throwable::cause_offset = java_lang_Throwable::hc_cause_offset * x + header; 3361 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header; 3362 java_lang_Throwable::static_unassigned_stacktrace_offset = java_lang_Throwable::hc_static_unassigned_stacktrace_offset * x; 3363 3364 // java_lang_boxing_object 3365 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header; 3366 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong); 3367 3368 // java_lang_ref_Reference: 3369 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header; 3370 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header; 3371 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header; 3372 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header; 3373 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x; 3374 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x; 3375 // Artificial fields for java_lang_ref_Reference 3376 // The first field is for the discovered field added in 1.4 3377 java_lang_ref_Reference::number_of_fake_oop_fields = 1; 3378 3379 // java_lang_ref_SoftReference Class 3380 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong); 3381 // Don't multiply static fields because they are always in wordSize units 3382 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x; 3383 3384 // java_lang_ClassLoader 3385 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header; 3386 3387 // java_lang_System 3388 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x; 3389 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x; 3390 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x; 3391 java_lang_System::static_security_offset = java_lang_System::hc_static_security_offset * x; 3392 3393 // java_lang_StackTraceElement 3394 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header; 3395 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header; 3396 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header; 3397 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header; 3398 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header; 3399 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header; 3400 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header; 3401 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header; 3402 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header; 3403 3404 } 3405 3406 3407 // Compute non-hard-coded field offsets of all the classes in this file 3408 void JavaClasses::compute_offsets() { 3409 // java_lang_Class::compute_offsets was called earlier in bootstrap 3410 java_lang_ClassLoader::compute_offsets(); 3411 java_lang_Thread::compute_offsets(); 3412 java_lang_ThreadGroup::compute_offsets(); 3413 java_lang_invoke_MethodHandle::compute_offsets(); 3414 java_lang_invoke_DirectMethodHandle::compute_offsets(); 3415 java_lang_invoke_MemberName::compute_offsets(); 3416 java_lang_invoke_LambdaForm::compute_offsets(); 3417 java_lang_invoke_MethodType::compute_offsets(); 3418 java_lang_invoke_CallSite::compute_offsets(); 3419 java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets(); 3420 java_security_AccessControlContext::compute_offsets(); 3421 // Initialize reflection classes. The layouts of these classes 3422 // changed with the new reflection implementation in JDK 1.4, and 3423 // since the Universe doesn't know what JDK version it is until this 3424 // point we defer computation of these offsets until now. 3425 java_lang_reflect_AccessibleObject::compute_offsets(); 3426 java_lang_reflect_Method::compute_offsets(); 3427 java_lang_reflect_Constructor::compute_offsets(); 3428 java_lang_reflect_Field::compute_offsets(); 3429 java_nio_Buffer::compute_offsets(); 3430 sun_reflect_ConstantPool::compute_offsets(); 3431 sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets(); 3432 java_lang_reflect_Parameter::compute_offsets(); 3433 3434 // generated interpreter code wants to know about the offsets we just computed: 3435 AbstractAssembler::update_delayed_values(); 3436 } 3437 3438 #ifndef PRODUCT 3439 3440 // These functions exist to assert the validity of hard-coded field offsets to guard 3441 // against changes in the class files 3442 3443 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 3444 EXCEPTION_MARK; 3445 fieldDescriptor fd; 3446 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3447 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3448 instanceKlassHandle h_klass (THREAD, k); 3449 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3450 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3451 if (!h_klass->find_local_field(f_name, f_sig, &fd)) { 3452 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 3453 return false; 3454 } 3455 if (fd.is_static()) { 3456 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 3457 return false; 3458 } 3459 if (fd.offset() == hardcoded_offset ) { 3460 return true; 3461 } else { 3462 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.", 3463 klass_name, field_name, hardcoded_offset, fd.offset()); 3464 return false; 3465 } 3466 } 3467 3468 3469 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 3470 EXCEPTION_MARK; 3471 fieldDescriptor fd; 3472 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3473 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3474 instanceKlassHandle h_klass (THREAD, k); 3475 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3476 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3477 if (!h_klass->find_local_field(f_name, f_sig, &fd)) { 3478 tty->print_cr("Static field %s.%s not found", klass_name, field_name); 3479 return false; 3480 } 3481 if (!fd.is_static()) { 3482 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name); 3483 return false; 3484 } 3485 if (fd.offset() == hardcoded_offset + InstanceMirrorKlass::offset_of_static_fields()) { 3486 return true; 3487 } else { 3488 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()); 3489 return false; 3490 } 3491 } 3492 3493 3494 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) { 3495 EXCEPTION_MARK; 3496 fieldDescriptor fd; 3497 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3498 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3499 instanceKlassHandle h_klass (THREAD, k); 3500 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3501 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3502 if (!h_klass->find_local_field(f_name, f_sig, &fd)) { 3503 tty->print_cr("Static field %s.%s not found", klass_name, field_name); 3504 return false; 3505 } 3506 if (!fd.is_static() || !fd.has_initial_value()) { 3507 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name); 3508 return false; 3509 } 3510 if (!fd.initial_value_tag().is_int()) { 3511 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name); 3512 return false; 3513 } 3514 jint field_value = fd.int_initial_value(); 3515 if (field_value == hardcoded_constant) { 3516 return true; 3517 } else { 3518 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); 3519 return false; 3520 } 3521 } 3522 3523 3524 // Check the hard-coded field offsets of all the classes in this file 3525 3526 void JavaClasses::check_offsets() { 3527 bool valid = true; 3528 HandleMark hm; 3529 3530 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3531 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig) 3532 3533 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3534 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig) 3535 3536 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3537 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig) 3538 3539 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \ 3540 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig) 3541 3542 // java.lang.String 3543 3544 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C"); 3545 if (java_lang_String::has_offset_field()) { 3546 CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I"); 3547 CHECK_OFFSET("java/lang/String", java_lang_String, count, "I"); 3548 } 3549 if (java_lang_String::has_hash_field()) { 3550 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I"); 3551 } 3552 3553 // java.lang.Class 3554 3555 // Fake fields 3556 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked 3557 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked 3558 3559 // java.lang.Throwable 3560 3561 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;"); 3562 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;"); 3563 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;"); 3564 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;"); 3565 3566 // Boxed primitive objects (java_lang_boxing_object) 3567 3568 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 3569 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 3570 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 3571 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 3572 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 3573 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 3574 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 3575 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 3576 3577 // java.lang.ClassLoader 3578 3579 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;"); 3580 3581 // java.lang.System 3582 3583 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;"); 3584 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;"); 3585 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;"); 3586 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, security, "Ljava/lang/SecurityManager;"); 3587 3588 // java.lang.StackTraceElement 3589 3590 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;"); 3591 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;"); 3592 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;"); 3593 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I"); 3594 3595 // java.lang.ref.Reference 3596 3597 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;"); 3598 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;"); 3599 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;"); 3600 // Fake field 3601 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;"); 3602 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;"); 3603 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;"); 3604 3605 // java.lang.ref.SoftReference 3606 3607 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J"); 3608 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J"); 3609 3610 // java.lang.AssertionStatusDirectives 3611 // 3612 // The CheckAssertionStatusDirectives boolean can be removed from here and 3613 // globals.hpp after the AssertionStatusDirectives class has been integrated 3614 // into merlin "for some time." Without it, the vm will fail with early 3615 // merlin builds. 3616 3617 if (CheckAssertionStatusDirectives) { 3618 const char* nm = "java/lang/AssertionStatusDirectives"; 3619 const char* sig = "[Ljava/lang/String;"; 3620 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig); 3621 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z"); 3622 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig); 3623 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z"); 3624 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z"); 3625 } 3626 3627 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed"); 3628 } 3629 3630 #endif // PRODUCT 3631 3632 int InjectedField::compute_offset() { 3633 Klass* klass_oop = klass(); 3634 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) { 3635 if (!may_be_java && !fs.access_flags().is_internal()) { 3636 // Only look at injected fields 3637 continue; 3638 } 3639 if (fs.name() == name() && fs.signature() == signature()) { 3640 return fs.offset(); 3641 } 3642 } 3643 ResourceMark rm; 3644 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)" : ""); 3645 #ifndef PRODUCT 3646 klass_oop->print(); 3647 tty->print_cr("all fields:"); 3648 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) { 3649 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 3650 } 3651 #endif //PRODUCT 3652 vm_exit_during_initialization("Invalid layout of preloaded class: use -XX:+TraceClassLoading to see the origin of the problem class"); 3653 return -1; 3654 } 3655 3656 void javaClasses_init() { 3657 JavaClasses::compute_offsets(); 3658 JavaClasses::check_offsets(); 3659 FilteredFieldsMap::initialize(); // must be done after computing offsets. 3660 }