javaClasses.cpp revision 7435:a5040fddd180
1/* 2 * Copyright (c) 1997, 2014, 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.hpp" 28#include "classfile/stringTable.hpp" 29#include "classfile/vmSymbols.hpp" 30#include "code/debugInfo.hpp" 31#include "code/pcDesc.hpp" 32#include "compiler/compilerOracle.hpp" 33#include "interpreter/interpreter.hpp" 34#include "memory/oopFactory.hpp" 35#include "memory/resourceArea.hpp" 36#include "memory/universe.inline.hpp" 37#include "oops/fieldStreams.hpp" 38#include "oops/instanceKlass.hpp" 39#include "oops/instanceMirrorKlass.hpp" 40#include "oops/klass.hpp" 41#include "oops/method.hpp" 42#include "oops/symbol.hpp" 43#include "oops/typeArrayOop.hpp" 44#include "prims/jvmtiRedefineClassesTrace.hpp" 45#include "runtime/fieldDescriptor.hpp" 46#include "runtime/handles.inline.hpp" 47#include "runtime/interfaceSupport.hpp" 48#include "runtime/java.hpp" 49#include "runtime/javaCalls.hpp" 50#include "runtime/safepoint.hpp" 51#include "runtime/thread.inline.hpp" 52#include "runtime/vframe.hpp" 53#include "utilities/preserveException.hpp" 54 55PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC 56 57#define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \ 58 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum); 59 60#define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \ 61 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java }, 62 63InjectedField JavaClasses::_injected_fields[] = { 64 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD) 65}; 66 67int JavaClasses::compute_injected_offset(InjectedFieldID id) { 68 return _injected_fields[id].compute_offset(); 69} 70 71 72InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) { 73 *field_count = 0; 74 75 vmSymbols::SID sid = vmSymbols::find_sid(class_name); 76 if (sid == vmSymbols::NO_SID) { 77 // Only well known classes can inject fields 78 return NULL; 79 } 80 81 int count = 0; 82 int start = -1; 83 84#define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \ 85 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \ 86 count++; \ 87 if (start == -1) start = klass##_##name##_enum; \ 88 } 89 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD); 90#undef LOOKUP_INJECTED_FIELD 91 92 if (start != -1) { 93 *field_count = count; 94 return _injected_fields + start; 95 } 96 return NULL; 97} 98 99 100static bool find_field(InstanceKlass* ik, 101 Symbol* name_symbol, Symbol* signature_symbol, 102 fieldDescriptor* fd, 103 bool allow_super = false) { 104 if (allow_super) 105 return ik->find_field(name_symbol, signature_symbol, fd) != NULL; 106 else 107 return ik->find_local_field(name_symbol, signature_symbol, fd); 108} 109 110// Helpful routine for computing field offsets at run time rather than hardcoding them 111static void 112compute_offset(int &dest_offset, 113 Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol, 114 bool allow_super = false) { 115 fieldDescriptor fd; 116 InstanceKlass* ik = InstanceKlass::cast(klass_oop); 117 if (!find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) { 118 ResourceMark rm; 119 tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string()); 120#ifndef PRODUCT 121 klass_oop->print(); 122 tty->print_cr("all fields:"); 123 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) { 124 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 125 } 126#endif //PRODUCT 127 fatal("Invalid layout of preloaded class"); 128 } 129 dest_offset = fd.offset(); 130} 131 132// Same as above but for "optional" offsets that might not be present in certain JDK versions 133static void 134compute_optional_offset(int& dest_offset, 135 Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol, 136 bool allow_super = false) { 137 fieldDescriptor fd; 138 InstanceKlass* ik = InstanceKlass::cast(klass_oop); 139 if (find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) { 140 dest_offset = fd.offset(); 141 } 142} 143 144 145int java_lang_String::value_offset = 0; 146int java_lang_String::offset_offset = 0; 147int java_lang_String::count_offset = 0; 148int java_lang_String::hash_offset = 0; 149 150bool java_lang_String::initialized = false; 151 152void java_lang_String::compute_offsets() { 153 assert(!initialized, "offsets should be initialized only once"); 154 155 Klass* k = SystemDictionary::String_klass(); 156 compute_offset(value_offset, k, vmSymbols::value_name(), vmSymbols::char_array_signature()); 157 compute_optional_offset(offset_offset, k, vmSymbols::offset_name(), vmSymbols::int_signature()); 158 compute_optional_offset(count_offset, k, vmSymbols::count_name(), vmSymbols::int_signature()); 159 compute_optional_offset(hash_offset, k, vmSymbols::hash_name(), vmSymbols::int_signature()); 160 161 initialized = true; 162} 163 164Handle java_lang_String::basic_create(int length, TRAPS) { 165 assert(initialized, "Must be initialized"); 166 // Create the String object first, so there's a chance that the String 167 // and the char array it points to end up in the same cache line. 168 oop obj; 169 obj = InstanceKlass::cast(SystemDictionary::String_klass())->allocate_instance(CHECK_NH); 170 171 // Create the char array. The String object must be handlized here 172 // because GC can happen as a result of the allocation attempt. 173 Handle h_obj(THREAD, obj); 174 typeArrayOop buffer; 175 buffer = oopFactory::new_charArray(length, CHECK_NH); 176 177 // Point the String at the char array 178 obj = h_obj(); 179 set_value(obj, buffer); 180 // No need to zero the offset, allocation zero'ed the entire String object 181 assert(offset(obj) == 0, "initial String offset should be zero"); 182//set_offset(obj, 0); 183 set_count(obj, length); 184 185 return h_obj; 186} 187 188Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) { 189 Handle h_obj = basic_create(length, CHECK_NH); 190 typeArrayOop buffer = value(h_obj()); 191 for (int index = 0; index < length; index++) { 192 buffer->char_at_put(index, unicode[index]); 193 } 194 return h_obj; 195} 196 197oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) { 198 Handle h_obj = create_from_unicode(unicode, length, CHECK_0); 199 return h_obj(); 200} 201 202Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) { 203 if (utf8_str == NULL) { 204 return Handle(); 205 } 206 int length = UTF8::unicode_length(utf8_str); 207 Handle h_obj = basic_create(length, CHECK_NH); 208 if (length > 0) { 209 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 210 } 211 return h_obj; 212} 213 214oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) { 215 Handle h_obj = create_from_str(utf8_str, CHECK_0); 216 return h_obj(); 217} 218 219Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) { 220 int length = UTF8::unicode_length((char*)symbol->bytes(), symbol->utf8_length()); 221 Handle h_obj = basic_create(length, CHECK_NH); 222 if (length > 0) { 223 UTF8::convert_to_unicode((char*)symbol->bytes(), value(h_obj())->char_at_addr(0), length); 224 } 225 return h_obj; 226} 227 228// Converts a C string to a Java String based on current encoding 229Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) { 230 assert(str != NULL, "bad arguments"); 231 232 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *); 233 static to_java_string_fn_t _to_java_string_fn = NULL; 234 235 if (_to_java_string_fn == NULL) { 236 void *lib_handle = os::native_java_library(); 237 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform")); 238 if (_to_java_string_fn == NULL) { 239 fatal("NewStringPlatform missing"); 240 } 241 } 242 243 jstring js = NULL; 244 { JavaThread* thread = (JavaThread*)THREAD; 245 assert(thread->is_Java_thread(), "must be java thread"); 246 HandleMark hm(thread); 247 ThreadToNativeFromVM ttn(thread); 248 js = (_to_java_string_fn)(thread->jni_environment(), str); 249 } 250 return Handle(THREAD, JNIHandles::resolve(js)); 251} 252 253// Converts a Java String to a native C string that can be used for 254// native OS calls. 255char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) { 256 257 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*); 258 static to_platform_string_fn_t _to_platform_string_fn = NULL; 259 260 if (_to_platform_string_fn == NULL) { 261 void *lib_handle = os::native_java_library(); 262 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars")); 263 if (_to_platform_string_fn == NULL) { 264 fatal("GetStringPlatformChars missing"); 265 } 266 } 267 268 char *native_platform_string; 269 { JavaThread* thread = (JavaThread*)THREAD; 270 assert(thread->is_Java_thread(), "must be java thread"); 271 JNIEnv *env = thread->jni_environment(); 272 jstring js = (jstring) JNIHandles::make_local(env, java_string()); 273 bool is_copy; 274 HandleMark hm(thread); 275 ThreadToNativeFromVM ttn(thread); 276 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy); 277 assert(is_copy == JNI_TRUE, "is_copy value changed"); 278 JNIHandles::destroy_local(js); 279 } 280 return native_platform_string; 281} 282 283Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) { 284 oop obj = java_string(); 285 // Typical usage is to convert all '/' to '.' in string. 286 typeArrayOop value = java_lang_String::value(obj); 287 int offset = java_lang_String::offset(obj); 288 int length = java_lang_String::length(obj); 289 290 // First check if any from_char exist 291 int index; // Declared outside, used later 292 for (index = 0; index < length; index++) { 293 if (value->char_at(index + offset) == from_char) { 294 break; 295 } 296 } 297 if (index == length) { 298 // No from_char, so do not copy. 299 return java_string; 300 } 301 302 // Create new UNICODE buffer. Must handlize value because GC 303 // may happen during String and char array creation. 304 typeArrayHandle h_value(THREAD, value); 305 Handle string = basic_create(length, CHECK_NH); 306 307 typeArrayOop from_buffer = h_value(); 308 typeArrayOop to_buffer = java_lang_String::value(string()); 309 310 // Copy contents 311 for (index = 0; index < length; index++) { 312 jchar c = from_buffer->char_at(index + offset); 313 if (c == from_char) { 314 c = to_char; 315 } 316 to_buffer->char_at_put(index, c); 317 } 318 return string; 319} 320 321jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) { 322 typeArrayOop value = java_lang_String::value(java_string); 323 int offset = java_lang_String::offset(java_string); 324 length = java_lang_String::length(java_string); 325 326 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length); 327 if (result != NULL) { 328 for (int index = 0; index < length; index++) { 329 result[index] = value->char_at(index + offset); 330 } 331 } else { 332 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string"); 333 } 334 return result; 335} 336 337unsigned int java_lang_String::hash_code(oop java_string) { 338 int length = java_lang_String::length(java_string); 339 // Zero length string will hash to zero with String.hashCode() function. 340 if (length == 0) return 0; 341 342 typeArrayOop value = java_lang_String::value(java_string); 343 int offset = java_lang_String::offset(java_string); 344 return java_lang_String::hash_code(value->char_at_addr(offset), length); 345} 346 347char* java_lang_String::as_quoted_ascii(oop java_string) { 348 typeArrayOop value = java_lang_String::value(java_string); 349 int offset = java_lang_String::offset(java_string); 350 int length = java_lang_String::length(java_string); 351 352 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset); 353 if (base == NULL) return NULL; 354 355 int result_length = UNICODE::quoted_ascii_length(base, length) + 1; 356 char* result = NEW_RESOURCE_ARRAY(char, result_length); 357 UNICODE::as_quoted_ascii(base, length, result, result_length); 358 assert(result_length >= length + 1, "must not be shorter"); 359 assert(result_length == (int)strlen(result) + 1, "must match"); 360 return result; 361} 362 363unsigned int java_lang_String::hash_string(oop java_string) { 364 int length = java_lang_String::length(java_string); 365 // Zero length string doesn't hash necessarily hash to zero. 366 if (length == 0) { 367 return StringTable::hash_string(NULL, 0); 368 } 369 370 typeArrayOop value = java_lang_String::value(java_string); 371 int offset = java_lang_String::offset(java_string); 372 return StringTable::hash_string(value->char_at_addr(offset), length); 373} 374 375Symbol* java_lang_String::as_symbol(Handle java_string, TRAPS) { 376 oop obj = java_string(); 377 typeArrayOop value = java_lang_String::value(obj); 378 int offset = java_lang_String::offset(obj); 379 int length = java_lang_String::length(obj); 380 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset); 381 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD); 382 return sym; 383} 384 385Symbol* java_lang_String::as_symbol_or_null(oop java_string) { 386 typeArrayOop value = java_lang_String::value(java_string); 387 int offset = java_lang_String::offset(java_string); 388 int length = java_lang_String::length(java_string); 389 jchar* base = (length == 0) ? NULL : value->char_at_addr(offset); 390 return SymbolTable::probe_unicode(base, length); 391} 392 393 394int java_lang_String::utf8_length(oop java_string) { 395 typeArrayOop value = java_lang_String::value(java_string); 396 int offset = java_lang_String::offset(java_string); 397 int length = java_lang_String::length(java_string); 398 jchar* position = (length == 0) ? NULL : value->char_at_addr(offset); 399 return UNICODE::utf8_length(position, length); 400} 401 402char* java_lang_String::as_utf8_string(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::as_utf8(position, length); 408} 409 410char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) { 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, buf, buflen); 416} 417 418char* java_lang_String::as_utf8_string(oop java_string, int start, int len) { 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 assert(start + len <= length, "just checking"); 423 jchar* position = value->char_at_addr(offset + start); 424 return UNICODE::as_utf8(position, len); 425} 426 427char* java_lang_String::as_utf8_string(oop java_string, int start, int len, char* buf, int buflen) { 428 typeArrayOop value = java_lang_String::value(java_string); 429 int offset = java_lang_String::offset(java_string); 430 int length = java_lang_String::length(java_string); 431 assert(start + len <= length, "just checking"); 432 jchar* position = value->char_at_addr(offset + start); 433 return UNICODE::as_utf8(position, len, buf, buflen); 434} 435 436bool java_lang_String::equals(oop java_string, jchar* chars, int len) { 437 assert(java_string->klass() == SystemDictionary::String_klass(), 438 "must be java_string"); 439 typeArrayOop value = java_lang_String::value(java_string); 440 int offset = java_lang_String::offset(java_string); 441 int length = java_lang_String::length(java_string); 442 if (length != len) { 443 return false; 444 } 445 for (int i = 0; i < len; i++) { 446 if (value->char_at(i + offset) != chars[i]) { 447 return false; 448 } 449 } 450 return true; 451} 452 453bool java_lang_String::equals(oop str1, oop str2) { 454 assert(str1->klass() == SystemDictionary::String_klass(), 455 "must be java String"); 456 assert(str2->klass() == SystemDictionary::String_klass(), 457 "must be java String"); 458 typeArrayOop value1 = java_lang_String::value(str1); 459 int offset1 = java_lang_String::offset(str1); 460 int length1 = java_lang_String::length(str1); 461 typeArrayOop value2 = java_lang_String::value(str2); 462 int offset2 = java_lang_String::offset(str2); 463 int length2 = java_lang_String::length(str2); 464 465 if (length1 != length2) { 466 return false; 467 } 468 for (int i = 0; i < length1; i++) { 469 if (value1->char_at(i + offset1) != value2->char_at(i + offset2)) { 470 return false; 471 } 472 } 473 return true; 474} 475 476void java_lang_String::print(oop java_string, outputStream* st) { 477 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string"); 478 typeArrayOop value = java_lang_String::value(java_string); 479 480 if (value == NULL) { 481 // This can happen if, e.g., printing a String 482 // object before its initializer has been called 483 st->print("NULL"); 484 return; 485 } 486 487 int offset = java_lang_String::offset(java_string); 488 int length = java_lang_String::length(java_string); 489 490 st->print("\""); 491 for (int index = 0; index < length; index++) { 492 st->print("%c", value->char_at(index + offset)); 493 } 494 st->print("\""); 495} 496 497 498static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 499 assert(mirror.not_null() && fd->is_static(), "just checking"); 500 if (fd->has_initial_value()) { 501 BasicType t = fd->field_type(); 502 switch (t) { 503 case T_BYTE: 504 mirror()->byte_field_put(fd->offset(), fd->int_initial_value()); 505 break; 506 case T_BOOLEAN: 507 mirror()->bool_field_put(fd->offset(), fd->int_initial_value()); 508 break; 509 case T_CHAR: 510 mirror()->char_field_put(fd->offset(), fd->int_initial_value()); 511 break; 512 case T_SHORT: 513 mirror()->short_field_put(fd->offset(), fd->int_initial_value()); 514 break; 515 case T_INT: 516 mirror()->int_field_put(fd->offset(), fd->int_initial_value()); 517 break; 518 case T_FLOAT: 519 mirror()->float_field_put(fd->offset(), fd->float_initial_value()); 520 break; 521 case T_DOUBLE: 522 mirror()->double_field_put(fd->offset(), fd->double_initial_value()); 523 break; 524 case T_LONG: 525 mirror()->long_field_put(fd->offset(), fd->long_initial_value()); 526 break; 527 case T_OBJECT: 528 { 529 #ifdef ASSERT 530 TempNewSymbol sym = SymbolTable::new_symbol("Ljava/lang/String;", CHECK); 531 assert(fd->signature() == sym, "just checking"); 532 #endif 533 oop string = fd->string_initial_value(CHECK); 534 mirror()->obj_field_put(fd->offset(), string); 535 } 536 break; 537 default: 538 THROW_MSG(vmSymbols::java_lang_ClassFormatError(), 539 "Illegal ConstantValue attribute in class file"); 540 } 541 } 542} 543 544 545void java_lang_Class::fixup_mirror(KlassHandle k, TRAPS) { 546 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already"); 547 548 // If the offset was read from the shared archive, it was fixed up already 549 if (!k->is_shared()) { 550 if (k->oop_is_instance()) { 551 // During bootstrap, java.lang.Class wasn't loaded so static field 552 // offsets were computed without the size added it. Go back and 553 // update all the static field offsets to included the size. 554 for (JavaFieldStream fs(InstanceKlass::cast(k())); !fs.done(); fs.next()) { 555 if (fs.access_flags().is_static()) { 556 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields(); 557 fs.set_offset(real_offset); 558 } 559 } 560 } 561 } 562 create_mirror(k, Handle(NULL), Handle(NULL), CHECK); 563} 564 565void java_lang_Class::initialize_mirror_fields(KlassHandle k, 566 Handle mirror, 567 Handle protection_domain, 568 TRAPS) { 569 // Allocate a simple java object for a lock. 570 // This needs to be a java object because during class initialization 571 // it can be held across a java call. 572 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK); 573 set_init_lock(mirror(), r); 574 575 // Set protection domain also 576 set_protection_domain(mirror(), protection_domain()); 577 578 // Initialize static fields 579 InstanceKlass::cast(k())->do_local_static_fields(&initialize_static_field, mirror, CHECK); 580} 581 582void java_lang_Class::create_mirror(KlassHandle k, Handle class_loader, 583 Handle protection_domain, TRAPS) { 584 assert(k->java_mirror() == NULL, "should only assign mirror once"); 585 // Use this moment of initialization to cache modifier_flags also, 586 // to support Class.getModifiers(). Instance classes recalculate 587 // the cached flags after the class file is parsed, but before the 588 // class is put into the system dictionary. 589 int computed_modifiers = k->compute_modifier_flags(CHECK); 590 k->set_modifier_flags(computed_modifiers); 591 // Class_klass has to be loaded because it is used to allocate 592 // the mirror. 593 if (SystemDictionary::Class_klass_loaded()) { 594 // Allocate mirror (java.lang.Class instance) 595 Handle mirror = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK); 596 597 // Setup indirection from mirror->klass 598 if (!k.is_null()) { 599 java_lang_Class::set_klass(mirror(), k()); 600 } 601 602 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass()); 603 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set"); 604 605 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror())); 606 607 // It might also have a component mirror. This mirror must already exist. 608 if (k->oop_is_array()) { 609 Handle comp_mirror; 610 if (k->oop_is_typeArray()) { 611 BasicType type = TypeArrayKlass::cast(k())->element_type(); 612 comp_mirror = Universe::java_mirror(type); 613 } else { 614 assert(k->oop_is_objArray(), "Must be"); 615 Klass* element_klass = ObjArrayKlass::cast(k())->element_klass(); 616 assert(element_klass != NULL, "Must have an element klass"); 617 comp_mirror = element_klass->java_mirror(); 618 } 619 assert(comp_mirror.not_null(), "must have a mirror"); 620 621 // Two-way link between the array klass and its component mirror: 622 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k 623 set_component_mirror(mirror(), comp_mirror()); 624 set_array_klass(comp_mirror(), k()); 625 } else { 626 assert(k->oop_is_instance(), "Must be"); 627 628 initialize_mirror_fields(k, mirror, protection_domain, THREAD); 629 if (HAS_PENDING_EXCEPTION) { 630 // If any of the fields throws an exception like OOM remove the klass field 631 // from the mirror so GC doesn't follow it after the klass has been deallocated. 632 // This mirror looks like a primitive type, which logically it is because it 633 // it represents no class. 634 java_lang_Class::set_klass(mirror(), NULL); 635 return; 636 } 637 } 638 639 // set the classLoader field in the java_lang_Class instance 640 assert(class_loader() == k->class_loader(), "should be same"); 641 set_class_loader(mirror(), class_loader()); 642 643 // Setup indirection from klass->mirror last 644 // after any exceptions can happen during allocations. 645 if (!k.is_null()) { 646 k->set_java_mirror(mirror()); 647 } 648 } else { 649 if (fixup_mirror_list() == NULL) { 650 GrowableArray<Klass*>* list = 651 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true); 652 set_fixup_mirror_list(list); 653 } 654 fixup_mirror_list()->push(k()); 655 } 656} 657 658 659int java_lang_Class::oop_size(oop java_class) { 660 assert(_oop_size_offset != 0, "must be set"); 661 return java_class->int_field(_oop_size_offset); 662} 663void java_lang_Class::set_oop_size(oop java_class, int size) { 664 assert(_oop_size_offset != 0, "must be set"); 665 java_class->int_field_put(_oop_size_offset, size); 666} 667int java_lang_Class::static_oop_field_count(oop java_class) { 668 assert(_static_oop_field_count_offset != 0, "must be set"); 669 return java_class->int_field(_static_oop_field_count_offset); 670} 671void java_lang_Class::set_static_oop_field_count(oop java_class, int size) { 672 assert(_static_oop_field_count_offset != 0, "must be set"); 673 java_class->int_field_put(_static_oop_field_count_offset, size); 674} 675 676oop java_lang_Class::protection_domain(oop java_class) { 677 assert(_protection_domain_offset != 0, "must be set"); 678 return java_class->obj_field(_protection_domain_offset); 679} 680void java_lang_Class::set_protection_domain(oop java_class, oop pd) { 681 assert(_protection_domain_offset != 0, "must be set"); 682 java_class->obj_field_put(_protection_domain_offset, pd); 683} 684 685void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) { 686 assert(_component_mirror_offset != 0, "must be set"); 687 java_class->obj_field_put(_component_mirror_offset, comp_mirror); 688 } 689oop java_lang_Class::component_mirror(oop java_class) { 690 assert(_component_mirror_offset != 0, "must be set"); 691 return java_class->obj_field(_component_mirror_offset); 692} 693 694oop java_lang_Class::init_lock(oop java_class) { 695 assert(_init_lock_offset != 0, "must be set"); 696 return java_class->obj_field(_init_lock_offset); 697} 698void java_lang_Class::set_init_lock(oop java_class, oop init_lock) { 699 assert(_init_lock_offset != 0, "must be set"); 700 java_class->obj_field_put(_init_lock_offset, init_lock); 701} 702 703objArrayOop java_lang_Class::signers(oop java_class) { 704 assert(_signers_offset != 0, "must be set"); 705 return (objArrayOop)java_class->obj_field(_signers_offset); 706} 707void java_lang_Class::set_signers(oop java_class, objArrayOop signers) { 708 assert(_signers_offset != 0, "must be set"); 709 java_class->obj_field_put(_signers_offset, (oop)signers); 710} 711 712 713void java_lang_Class::set_class_loader(oop java_class, oop loader) { 714 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet. 715 if (_class_loader_offset != 0) { 716 java_class->obj_field_put(_class_loader_offset, loader); 717 } 718} 719 720oop java_lang_Class::class_loader(oop java_class) { 721 assert(_class_loader_offset != 0, "must be set"); 722 return java_class->obj_field(_class_loader_offset); 723} 724 725oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) { 726 // This should be improved by adding a field at the Java level or by 727 // introducing a new VM klass (see comment in ClassFileParser) 728 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0); 729 if (type != T_VOID) { 730 Klass* aklass = Universe::typeArrayKlassObj(type); 731 assert(aklass != NULL, "correct bootstrap"); 732 set_array_klass(java_class, aklass); 733 } 734#ifdef ASSERT 735 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass()); 736 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation"); 737#endif 738 return java_class; 739} 740 741 742Klass* java_lang_Class::as_Klass(oop java_class) { 743 //%note memory_2 744 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 745 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset)); 746 assert(k == NULL || k->is_klass(), "type check"); 747 return k; 748} 749 750 751void java_lang_Class::set_klass(oop java_class, Klass* klass) { 752 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 753 java_class->metadata_field_put(_klass_offset, klass); 754} 755 756 757void java_lang_Class::print_signature(oop java_class, outputStream* st) { 758 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 759 Symbol* name = NULL; 760 bool is_instance = false; 761 if (is_primitive(java_class)) { 762 name = vmSymbols::type_signature(primitive_type(java_class)); 763 } else { 764 Klass* k = as_Klass(java_class); 765 is_instance = k->oop_is_instance(); 766 name = k->name(); 767 } 768 if (name == NULL) { 769 st->print("<null>"); 770 return; 771 } 772 if (is_instance) st->print("L"); 773 st->write((char*) name->base(), (int) name->utf8_length()); 774 if (is_instance) st->print(";"); 775} 776 777Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) { 778 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 779 Symbol* name; 780 if (is_primitive(java_class)) { 781 name = vmSymbols::type_signature(primitive_type(java_class)); 782 // Because this can create a new symbol, the caller has to decrement 783 // the refcount, so make adjustment here and below for symbols returned 784 // that are not created or incremented due to a successful lookup. 785 name->increment_refcount(); 786 } else { 787 Klass* k = as_Klass(java_class); 788 if (!k->oop_is_instance()) { 789 name = k->name(); 790 name->increment_refcount(); 791 } else { 792 ResourceMark rm; 793 const char* sigstr = k->signature_name(); 794 int siglen = (int) strlen(sigstr); 795 if (!intern_if_not_found) { 796 name = SymbolTable::probe(sigstr, siglen); 797 } else { 798 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 799 } 800 } 801 } 802 return name; 803} 804 805 806Klass* java_lang_Class::array_klass(oop java_class) { 807 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset)); 808 assert(k == NULL || k->is_klass() && k->oop_is_array(), "should be array klass"); 809 return k; 810} 811 812 813void java_lang_Class::set_array_klass(oop java_class, Klass* klass) { 814 assert(klass->is_klass() && klass->oop_is_array(), "should be array klass"); 815 java_class->metadata_field_put(_array_klass_offset, klass); 816} 817 818 819bool java_lang_Class::is_primitive(oop java_class) { 820 // should assert: 821 //assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 822 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL); 823 824#ifdef ASSERT 825 if (is_primitive) { 826 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset)); 827 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()), 828 "Should be either the T_VOID primitive or a java primitive"); 829 } 830#endif 831 832 return is_primitive; 833} 834 835 836BasicType java_lang_Class::primitive_type(oop java_class) { 837 assert(java_lang_Class::is_primitive(java_class), "just checking"); 838 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset)); 839 BasicType type = T_VOID; 840 if (ak != NULL) { 841 // Note: create_basic_type_mirror above initializes ak to a non-null value. 842 type = ArrayKlass::cast(ak)->element_type(); 843 } else { 844 assert(java_class == Universe::void_mirror(), "only valid non-array primitive"); 845 } 846 assert(Universe::java_mirror(type) == java_class, "must be consistent"); 847 return type; 848} 849 850BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) { 851 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 852 if (is_primitive(java_class)) { 853 if (reference_klass != NULL) 854 (*reference_klass) = NULL; 855 return primitive_type(java_class); 856 } else { 857 if (reference_klass != NULL) 858 (*reference_klass) = as_Klass(java_class); 859 return T_OBJECT; 860 } 861} 862 863 864oop java_lang_Class::primitive_mirror(BasicType t) { 865 oop mirror = Universe::java_mirror(t); 866 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class"); 867 assert(java_lang_Class::is_primitive(mirror), "must be primitive"); 868 return mirror; 869} 870 871bool java_lang_Class::offsets_computed = false; 872int java_lang_Class::classRedefinedCount_offset = -1; 873 874void java_lang_Class::compute_offsets() { 875 assert(!offsets_computed, "offsets should be initialized only once"); 876 offsets_computed = true; 877 878 Klass* k = SystemDictionary::Class_klass(); 879 // The classRedefinedCount field is only present starting in 1.5, 880 // so don't go fatal. 881 compute_optional_offset(classRedefinedCount_offset, 882 k, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature()); 883 884 // Needs to be optional because the old build runs Queens during bootstrapping 885 // and jdk8-9 doesn't have coordinated pushes yet. 886 compute_optional_offset(_class_loader_offset, 887 k, vmSymbols::classLoader_name(), 888 vmSymbols::classloader_signature()); 889 890 compute_offset(_component_mirror_offset, 891 k, vmSymbols::componentType_name(), 892 vmSymbols::class_signature()); 893 894 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have 895 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops 896 // GC treats them the same. 897 _init_lock_offset = _component_mirror_offset; 898 899 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 900} 901 902int java_lang_Class::classRedefinedCount(oop the_class_mirror) { 903 if (classRedefinedCount_offset == -1) { 904 // If we don't have an offset for it then just return -1 as a marker. 905 return -1; 906 } 907 908 return the_class_mirror->int_field(classRedefinedCount_offset); 909} 910 911void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) { 912 if (classRedefinedCount_offset == -1) { 913 // If we don't have an offset for it then nothing to set. 914 return; 915 } 916 917 the_class_mirror->int_field_put(classRedefinedCount_offset, value); 918} 919 920 921// Note: JDK1.1 and before had a privateInfo_offset field which was used for the 922// platform thread structure, and a eetop offset which was used for thread 923// local storage (and unused by the HotSpot VM). In JDK1.2 the two structures 924// merged, so in the HotSpot VM we just use the eetop field for the thread 925// instead of the privateInfo_offset. 926// 927// Note: The stackSize field is only present starting in 1.4. 928 929int java_lang_Thread::_name_offset = 0; 930int java_lang_Thread::_group_offset = 0; 931int java_lang_Thread::_contextClassLoader_offset = 0; 932int java_lang_Thread::_inheritedAccessControlContext_offset = 0; 933int java_lang_Thread::_priority_offset = 0; 934int java_lang_Thread::_eetop_offset = 0; 935int java_lang_Thread::_daemon_offset = 0; 936int java_lang_Thread::_stillborn_offset = 0; 937int java_lang_Thread::_stackSize_offset = 0; 938int java_lang_Thread::_tid_offset = 0; 939int java_lang_Thread::_thread_status_offset = 0; 940int java_lang_Thread::_park_blocker_offset = 0; 941int java_lang_Thread::_park_event_offset = 0 ; 942 943 944void java_lang_Thread::compute_offsets() { 945 assert(_group_offset == 0, "offsets should be initialized only once"); 946 947 Klass* k = SystemDictionary::Thread_klass(); 948 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 949 compute_offset(_group_offset, k, vmSymbols::group_name(), vmSymbols::threadgroup_signature()); 950 compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature()); 951 compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature()); 952 compute_offset(_priority_offset, k, vmSymbols::priority_name(), vmSymbols::int_signature()); 953 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature()); 954 compute_offset(_eetop_offset, k, vmSymbols::eetop_name(), vmSymbols::long_signature()); 955 compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature()); 956 // The stackSize field is only present starting in 1.4, so don't go fatal. 957 compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature()); 958 // The tid and thread_status fields are only present starting in 1.5, so don't go fatal. 959 compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature()); 960 compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature()); 961 // The parkBlocker field is only present starting in 1.6, so don't go fatal. 962 compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature()); 963 compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(), 964 vmSymbols::long_signature()); 965} 966 967 968JavaThread* java_lang_Thread::thread(oop java_thread) { 969 return (JavaThread*)java_thread->address_field(_eetop_offset); 970} 971 972 973void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) { 974 java_thread->address_field_put(_eetop_offset, (address)thread); 975} 976 977 978oop java_lang_Thread::name(oop java_thread) { 979 return java_thread->obj_field(_name_offset); 980} 981 982 983void java_lang_Thread::set_name(oop java_thread, oop name) { 984 java_thread->obj_field_put(_name_offset, name); 985} 986 987 988ThreadPriority java_lang_Thread::priority(oop java_thread) { 989 return (ThreadPriority)java_thread->int_field(_priority_offset); 990} 991 992 993void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) { 994 java_thread->int_field_put(_priority_offset, priority); 995} 996 997 998oop java_lang_Thread::threadGroup(oop java_thread) { 999 return java_thread->obj_field(_group_offset); 1000} 1001 1002 1003bool java_lang_Thread::is_stillborn(oop java_thread) { 1004 return java_thread->bool_field(_stillborn_offset) != 0; 1005} 1006 1007 1008// We never have reason to turn the stillborn bit off 1009void java_lang_Thread::set_stillborn(oop java_thread) { 1010 java_thread->bool_field_put(_stillborn_offset, true); 1011} 1012 1013 1014bool java_lang_Thread::is_alive(oop java_thread) { 1015 JavaThread* thr = java_lang_Thread::thread(java_thread); 1016 return (thr != NULL); 1017} 1018 1019 1020bool java_lang_Thread::is_daemon(oop java_thread) { 1021 return java_thread->bool_field(_daemon_offset) != 0; 1022} 1023 1024 1025void java_lang_Thread::set_daemon(oop java_thread) { 1026 java_thread->bool_field_put(_daemon_offset, true); 1027} 1028 1029oop java_lang_Thread::context_class_loader(oop java_thread) { 1030 return java_thread->obj_field(_contextClassLoader_offset); 1031} 1032 1033oop java_lang_Thread::inherited_access_control_context(oop java_thread) { 1034 return java_thread->obj_field(_inheritedAccessControlContext_offset); 1035} 1036 1037 1038jlong java_lang_Thread::stackSize(oop java_thread) { 1039 if (_stackSize_offset > 0) { 1040 return java_thread->long_field(_stackSize_offset); 1041 } else { 1042 return 0; 1043 } 1044} 1045 1046// Write the thread status value to threadStatus field in java.lang.Thread java class. 1047void java_lang_Thread::set_thread_status(oop java_thread, 1048 java_lang_Thread::ThreadStatus status) { 1049 // The threadStatus is only present starting in 1.5 1050 if (_thread_status_offset > 0) { 1051 java_thread->int_field_put(_thread_status_offset, status); 1052 } 1053} 1054 1055// Read thread status value from threadStatus field in java.lang.Thread java class. 1056java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) { 1057 assert(Thread::current()->is_Watcher_thread() || Thread::current()->is_VM_thread() || 1058 JavaThread::current()->thread_state() == _thread_in_vm, 1059 "Java Thread is not running in vm"); 1060 // The threadStatus is only present starting in 1.5 1061 if (_thread_status_offset > 0) { 1062 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1063 } else { 1064 // All we can easily figure out is if it is alive, but that is 1065 // enough info for a valid unknown status. 1066 // These aren't restricted to valid set ThreadStatus values, so 1067 // use JVMTI values and cast. 1068 JavaThread* thr = java_lang_Thread::thread(java_thread); 1069 if (thr == NULL) { 1070 // the thread hasn't run yet or is in the process of exiting 1071 return NEW; 1072 } 1073 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE; 1074 } 1075} 1076 1077 1078jlong java_lang_Thread::thread_id(oop java_thread) { 1079 // The thread ID field is only present starting in 1.5 1080 if (_tid_offset > 0) { 1081 return java_thread->long_field(_tid_offset); 1082 } else { 1083 return 0; 1084 } 1085} 1086 1087oop java_lang_Thread::park_blocker(oop java_thread) { 1088 assert(JDK_Version::current().supports_thread_park_blocker() && 1089 _park_blocker_offset != 0, "Must support parkBlocker field"); 1090 1091 if (_park_blocker_offset > 0) { 1092 return java_thread->obj_field(_park_blocker_offset); 1093 } 1094 1095 return NULL; 1096} 1097 1098jlong java_lang_Thread::park_event(oop java_thread) { 1099 if (_park_event_offset > 0) { 1100 return java_thread->long_field(_park_event_offset); 1101 } 1102 return 0; 1103} 1104 1105bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) { 1106 if (_park_event_offset > 0) { 1107 java_thread->long_field_put(_park_event_offset, ptr); 1108 return true; 1109 } 1110 return false; 1111} 1112 1113 1114const char* java_lang_Thread::thread_status_name(oop java_thread) { 1115 assert(_thread_status_offset != 0, "Must have thread status"); 1116 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1117 switch (status) { 1118 case NEW : return "NEW"; 1119 case RUNNABLE : return "RUNNABLE"; 1120 case SLEEPING : return "TIMED_WAITING (sleeping)"; 1121 case IN_OBJECT_WAIT : return "WAITING (on object monitor)"; 1122 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)"; 1123 case PARKED : return "WAITING (parking)"; 1124 case PARKED_TIMED : return "TIMED_WAITING (parking)"; 1125 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)"; 1126 case TERMINATED : return "TERMINATED"; 1127 default : return "UNKNOWN"; 1128 }; 1129} 1130int java_lang_ThreadGroup::_parent_offset = 0; 1131int java_lang_ThreadGroup::_name_offset = 0; 1132int java_lang_ThreadGroup::_threads_offset = 0; 1133int java_lang_ThreadGroup::_groups_offset = 0; 1134int java_lang_ThreadGroup::_maxPriority_offset = 0; 1135int java_lang_ThreadGroup::_destroyed_offset = 0; 1136int java_lang_ThreadGroup::_daemon_offset = 0; 1137int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0; 1138int java_lang_ThreadGroup::_nthreads_offset = 0; 1139int java_lang_ThreadGroup::_ngroups_offset = 0; 1140 1141oop java_lang_ThreadGroup::parent(oop java_thread_group) { 1142 assert(java_thread_group->is_oop(), "thread group must be oop"); 1143 return java_thread_group->obj_field(_parent_offset); 1144} 1145 1146// ("name as oop" accessor is not necessary) 1147 1148typeArrayOop java_lang_ThreadGroup::name(oop java_thread_group) { 1149 oop name = java_thread_group->obj_field(_name_offset); 1150 // ThreadGroup.name can be null 1151 return name == NULL ? (typeArrayOop)NULL : java_lang_String::value(name); 1152} 1153 1154int java_lang_ThreadGroup::nthreads(oop java_thread_group) { 1155 assert(java_thread_group->is_oop(), "thread group must be oop"); 1156 return java_thread_group->int_field(_nthreads_offset); 1157} 1158 1159objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) { 1160 oop threads = java_thread_group->obj_field(_threads_offset); 1161 assert(threads != NULL, "threadgroups should have threads"); 1162 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code 1163 return objArrayOop(threads); 1164} 1165 1166int java_lang_ThreadGroup::ngroups(oop java_thread_group) { 1167 assert(java_thread_group->is_oop(), "thread group must be oop"); 1168 return java_thread_group->int_field(_ngroups_offset); 1169} 1170 1171objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) { 1172 oop groups = java_thread_group->obj_field(_groups_offset); 1173 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code 1174 return objArrayOop(groups); 1175} 1176 1177ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) { 1178 assert(java_thread_group->is_oop(), "thread group must be oop"); 1179 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset); 1180} 1181 1182bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) { 1183 assert(java_thread_group->is_oop(), "thread group must be oop"); 1184 return java_thread_group->bool_field(_destroyed_offset) != 0; 1185} 1186 1187bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) { 1188 assert(java_thread_group->is_oop(), "thread group must be oop"); 1189 return java_thread_group->bool_field(_daemon_offset) != 0; 1190} 1191 1192bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) { 1193 assert(java_thread_group->is_oop(), "thread group must be oop"); 1194 return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0; 1195} 1196 1197void java_lang_ThreadGroup::compute_offsets() { 1198 assert(_parent_offset == 0, "offsets should be initialized only once"); 1199 1200 Klass* k = SystemDictionary::ThreadGroup_klass(); 1201 1202 compute_offset(_parent_offset, k, vmSymbols::parent_name(), vmSymbols::threadgroup_signature()); 1203 compute_offset(_name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1204 compute_offset(_threads_offset, k, vmSymbols::threads_name(), vmSymbols::thread_array_signature()); 1205 compute_offset(_groups_offset, k, vmSymbols::groups_name(), vmSymbols::threadgroup_array_signature()); 1206 compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature()); 1207 compute_offset(_destroyed_offset, k, vmSymbols::destroyed_name(), vmSymbols::bool_signature()); 1208 compute_offset(_daemon_offset, k, vmSymbols::daemon_name(), vmSymbols::bool_signature()); 1209 compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature()); 1210 compute_offset(_nthreads_offset, k, vmSymbols::nthreads_name(), vmSymbols::int_signature()); 1211 compute_offset(_ngroups_offset, k, vmSymbols::ngroups_name(), vmSymbols::int_signature()); 1212} 1213 1214oop java_lang_Throwable::unassigned_stacktrace() { 1215 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Throwable_klass()); 1216 address addr = ik->static_field_addr(static_unassigned_stacktrace_offset); 1217 if (UseCompressedOops) { 1218 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 1219 } else { 1220 return oopDesc::load_decode_heap_oop((oop*)addr); 1221 } 1222} 1223 1224oop java_lang_Throwable::backtrace(oop throwable) { 1225 return throwable->obj_field_acquire(backtrace_offset); 1226} 1227 1228 1229void java_lang_Throwable::set_backtrace(oop throwable, oop value) { 1230 throwable->release_obj_field_put(backtrace_offset, value); 1231} 1232 1233 1234oop java_lang_Throwable::message(oop throwable) { 1235 return throwable->obj_field(detailMessage_offset); 1236} 1237 1238 1239oop java_lang_Throwable::message(Handle throwable) { 1240 return throwable->obj_field(detailMessage_offset); 1241} 1242 1243 1244// Return Symbol for detailed_message or NULL 1245Symbol* java_lang_Throwable::detail_message(oop throwable) { 1246 PRESERVE_EXCEPTION_MARK; // Keep original exception 1247 oop detailed_message = java_lang_Throwable::message(throwable); 1248 if (detailed_message != NULL) { 1249 return java_lang_String::as_symbol(detailed_message, THREAD); 1250 } 1251 return NULL; 1252} 1253 1254void java_lang_Throwable::set_message(oop throwable, oop value) { 1255 throwable->obj_field_put(detailMessage_offset, value); 1256} 1257 1258 1259void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) { 1260 throwable->obj_field_put(stackTrace_offset, st_element_array); 1261} 1262 1263void java_lang_Throwable::clear_stacktrace(oop throwable) { 1264 set_stacktrace(throwable, NULL); 1265} 1266 1267 1268void java_lang_Throwable::print(oop throwable, outputStream* st) { 1269 ResourceMark rm; 1270 Klass* k = throwable->klass(); 1271 assert(k != NULL, "just checking"); 1272 st->print("%s", InstanceKlass::cast(k)->external_name()); 1273 oop msg = message(throwable); 1274 if (msg != NULL) { 1275 st->print(": %s", java_lang_String::as_utf8_string(msg)); 1276 } 1277} 1278 1279 1280void java_lang_Throwable::print(Handle throwable, outputStream* st) { 1281 ResourceMark rm; 1282 Klass* k = throwable->klass(); 1283 assert(k != NULL, "just checking"); 1284 st->print("%s", InstanceKlass::cast(k)->external_name()); 1285 oop msg = message(throwable); 1286 if (msg != NULL) { 1287 st->print(": %s", java_lang_String::as_utf8_string(msg)); 1288 } 1289} 1290 1291// After this many redefines, the stack trace is unreliable. 1292const int MAX_VERSION = USHRT_MAX; 1293 1294// Helper backtrace functions to store bci|version together. 1295static inline int merge_bci_and_version(int bci, int version) { 1296 // only store u2 for version, checking for overflow. 1297 if (version > USHRT_MAX || version < 0) version = MAX_VERSION; 1298 assert((jushort)bci == bci, "bci should be short"); 1299 return build_int_from_shorts(version, bci); 1300} 1301 1302static inline int bci_at(unsigned int merged) { 1303 return extract_high_short_from_int(merged); 1304} 1305static inline int version_at(unsigned int merged) { 1306 return extract_low_short_from_int(merged); 1307} 1308 1309static inline bool version_matches(Method* method, int version) { 1310 return (method->constants()->version() == version && version < MAX_VERSION); 1311} 1312 1313static inline int get_line_number(Method* method, int bci) { 1314 int line_number = 0; 1315 if (method->is_native()) { 1316 // Negative value different from -1 below, enabling Java code in 1317 // class java.lang.StackTraceElement to distinguish "native" from 1318 // "no LineNumberTable". JDK tests for -2. 1319 line_number = -2; 1320 } else { 1321 // Returns -1 if no LineNumberTable, and otherwise actual line number 1322 line_number = method->line_number_from_bci(bci); 1323 if (line_number == -1 && ShowHiddenFrames) { 1324 line_number = bci + 1000000; 1325 } 1326 } 1327 return line_number; 1328} 1329 1330// This class provides a simple wrapper over the internal structure of 1331// exception backtrace to insulate users of the backtrace from needing 1332// to know what it looks like. 1333class BacktraceBuilder: public StackObj { 1334 private: 1335 Handle _backtrace; 1336 objArrayOop _head; 1337 typeArrayOop _methods; 1338 typeArrayOop _bcis; 1339 objArrayOop _mirrors; 1340 int _index; 1341 No_Safepoint_Verifier _nsv; 1342 1343 public: 1344 1345 enum { 1346 trace_methods_offset = java_lang_Throwable::trace_methods_offset, 1347 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset, 1348 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset, 1349 trace_next_offset = java_lang_Throwable::trace_next_offset, 1350 trace_size = java_lang_Throwable::trace_size, 1351 trace_chunk_size = java_lang_Throwable::trace_chunk_size 1352 }; 1353 1354 // get info out of chunks 1355 static typeArrayOop get_methods(objArrayHandle chunk) { 1356 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset)); 1357 assert(methods != NULL, "method array should be initialized in backtrace"); 1358 return methods; 1359 } 1360 static typeArrayOop get_bcis(objArrayHandle chunk) { 1361 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 1362 assert(bcis != NULL, "bci array should be initialized in backtrace"); 1363 return bcis; 1364 } 1365 static objArrayOop get_mirrors(objArrayHandle chunk) { 1366 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset)); 1367 assert(mirrors != NULL, "mirror array should be initialized in backtrace"); 1368 return mirrors; 1369 } 1370 1371 // constructor for new backtrace 1372 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL) { 1373 expand(CHECK); 1374 _backtrace = _head; 1375 _index = 0; 1376 } 1377 1378 BacktraceBuilder(objArrayHandle backtrace) { 1379 _methods = get_methods(backtrace); 1380 _bcis = get_bcis(backtrace); 1381 _mirrors = get_mirrors(backtrace); 1382 assert(_methods->length() == _bcis->length() && 1383 _methods->length() == _mirrors->length(), 1384 "method and source information arrays should match"); 1385 1386 // head is the preallocated backtrace 1387 _backtrace = _head = backtrace(); 1388 _index = 0; 1389 } 1390 1391 void expand(TRAPS) { 1392 objArrayHandle old_head(THREAD, _head); 1393 Pause_No_Safepoint_Verifier pnsv(&_nsv); 1394 1395 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK); 1396 objArrayHandle new_head(THREAD, head); 1397 1398 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK); 1399 typeArrayHandle new_methods(THREAD, methods); 1400 1401 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK); 1402 typeArrayHandle new_bcis(THREAD, bcis); 1403 1404 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK); 1405 objArrayHandle new_mirrors(THREAD, mirrors); 1406 1407 if (!old_head.is_null()) { 1408 old_head->obj_at_put(trace_next_offset, new_head()); 1409 } 1410 new_head->obj_at_put(trace_methods_offset, new_methods()); 1411 new_head->obj_at_put(trace_bcis_offset, new_bcis()); 1412 new_head->obj_at_put(trace_mirrors_offset, new_mirrors()); 1413 1414 _head = new_head(); 1415 _methods = new_methods(); 1416 _bcis = new_bcis(); 1417 _mirrors = new_mirrors(); 1418 _index = 0; 1419 } 1420 1421 oop backtrace() { 1422 return _backtrace(); 1423 } 1424 1425 inline void push(Method* method, int bci, TRAPS) { 1426 // Smear the -1 bci to 0 since the array only holds unsigned 1427 // shorts. The later line number lookup would just smear the -1 1428 // to a 0 even if it could be recorded. 1429 if (bci == SynchronizationEntryBCI) bci = 0; 1430 1431 if (_index >= trace_chunk_size) { 1432 methodHandle mhandle(THREAD, method); 1433 expand(CHECK); 1434 method = mhandle(); 1435 } 1436 1437 _methods->short_at_put(_index, method->method_idnum()); 1438 _bcis->int_at_put(_index, merge_bci_and_version(bci, method->constants()->version())); 1439 1440 // We need to save the mirrors in the backtrace to keep the class 1441 // from being unloaded while we still have this stack trace. 1442 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror"); 1443 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror()); 1444 _index++; 1445 } 1446 1447}; 1448 1449// Print stack trace element to resource allocated buffer 1450char* java_lang_Throwable::print_stack_element_to_buffer(Handle mirror, 1451 int method_id, int version, int bci) { 1452 1453 // Get strings and string lengths 1454 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 1455 const char* klass_name = holder->external_name(); 1456 int buf_len = (int)strlen(klass_name); 1457 1458 // The method id may point to an obsolete method, can't get more stack information 1459 Method* method = holder->method_with_idnum(method_id); 1460 if (method == NULL) { 1461 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64); 1462 // This is what the java code prints in this case - added Redefined 1463 sprintf(buf, "\tat %s.null (Redefined)", klass_name); 1464 return buf; 1465 } 1466 1467 char* method_name = method->name()->as_C_string(); 1468 buf_len += (int)strlen(method_name); 1469 1470 char* source_file_name = NULL; 1471 if (version_matches(method, version)) { 1472 Symbol* source = holder->source_file_name(); 1473 if (source != NULL) { 1474 source_file_name = source->as_C_string(); 1475 buf_len += (int)strlen(source_file_name); 1476 } 1477 } 1478 1479 // Allocate temporary buffer with extra space for formatting and line number 1480 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64); 1481 1482 // Print stack trace line in buffer 1483 sprintf(buf, "\tat %s.%s", klass_name, method_name); 1484 1485 if (!version_matches(method, version)) { 1486 strcat(buf, "(Redefined)"); 1487 } else { 1488 int line_number = get_line_number(method, bci); 1489 if (line_number == -2) { 1490 strcat(buf, "(Native Method)"); 1491 } else { 1492 if (source_file_name != NULL && (line_number != -1)) { 1493 // Sourcename and linenumber 1494 sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number); 1495 } else if (source_file_name != NULL) { 1496 // Just sourcename 1497 sprintf(buf + (int)strlen(buf), "(%s)", source_file_name); 1498 } else { 1499 // Neither sourcename nor linenumber 1500 sprintf(buf + (int)strlen(buf), "(Unknown Source)"); 1501 } 1502 nmethod* nm = method->code(); 1503 if (WizardMode && nm != NULL) { 1504 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm); 1505 } 1506 } 1507 } 1508 1509 return buf; 1510} 1511 1512void java_lang_Throwable::print_stack_element(outputStream *st, Handle mirror, 1513 int method_id, int version, int bci) { 1514 ResourceMark rm; 1515 char* buf = print_stack_element_to_buffer(mirror, method_id, version, bci); 1516 st->print_cr("%s", buf); 1517} 1518 1519void java_lang_Throwable::print_stack_element(outputStream *st, methodHandle method, int bci) { 1520 Handle mirror = method->method_holder()->java_mirror(); 1521 int method_id = method->method_idnum(); 1522 int version = method->constants()->version(); 1523 print_stack_element(st, mirror, method_id, version, bci); 1524} 1525 1526const char* java_lang_Throwable::no_stack_trace_message() { 1527 return "\t<<no stack trace available>>"; 1528} 1529 1530 1531// Currently used only for exceptions occurring during startup 1532void java_lang_Throwable::print_stack_trace(oop throwable, outputStream* st) { 1533 Thread *THREAD = Thread::current(); 1534 Handle h_throwable(THREAD, throwable); 1535 while (h_throwable.not_null()) { 1536 objArrayHandle result (THREAD, objArrayOop(backtrace(h_throwable()))); 1537 if (result.is_null()) { 1538 st->print_cr("%s", no_stack_trace_message()); 1539 return; 1540 } 1541 1542 while (result.not_null()) { 1543 1544 // Get method id, bci, version and mirror from chunk 1545 typeArrayHandle methods (THREAD, BacktraceBuilder::get_methods(result)); 1546 typeArrayHandle bcis (THREAD, BacktraceBuilder::get_bcis(result)); 1547 objArrayHandle mirrors (THREAD, BacktraceBuilder::get_mirrors(result)); 1548 1549 int length = methods()->length(); 1550 for (int index = 0; index < length; index++) { 1551 Handle mirror(THREAD, mirrors->obj_at(index)); 1552 // NULL mirror means end of stack trace 1553 if (mirror.is_null()) goto handle_cause; 1554 int method = methods->short_at(index); 1555 int version = version_at(bcis->int_at(index)); 1556 int bci = bci_at(bcis->int_at(index)); 1557 print_stack_element(st, mirror, method, version, bci); 1558 } 1559 result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset))); 1560 } 1561 handle_cause: 1562 { 1563 EXCEPTION_MARK; 1564 JavaValue cause(T_OBJECT); 1565 JavaCalls::call_virtual(&cause, 1566 h_throwable, 1567 KlassHandle(THREAD, h_throwable->klass()), 1568 vmSymbols::getCause_name(), 1569 vmSymbols::void_throwable_signature(), 1570 THREAD); 1571 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 1572 if (HAS_PENDING_EXCEPTION) { 1573 CLEAR_PENDING_EXCEPTION; 1574 h_throwable = Handle(); 1575 } else { 1576 h_throwable = Handle(THREAD, (oop) cause.get_jobject()); 1577 if (h_throwable.not_null()) { 1578 st->print("Caused by: "); 1579 print(h_throwable, st); 1580 st->cr(); 1581 } 1582 } 1583 } 1584 } 1585} 1586 1587void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS) { 1588 if (!StackTraceInThrowable) return; 1589 ResourceMark rm(THREAD); 1590 1591 // Start out by clearing the backtrace for this object, in case the VM 1592 // runs out of memory while allocating the stack trace 1593 set_backtrace(throwable(), NULL); 1594 // Clear lazily constructed Java level stacktrace if refilling occurs 1595 // This is unnecessary in 1.7+ but harmless 1596 clear_stacktrace(throwable()); 1597 1598 int max_depth = MaxJavaStackTraceDepth; 1599 JavaThread* thread = (JavaThread*)THREAD; 1600 BacktraceBuilder bt(CHECK); 1601 1602 // If there is no Java frame just return the method that was being called 1603 // with bci 0 1604 if (!thread->has_last_Java_frame()) { 1605 if (max_depth >= 1 && method() != NULL) { 1606 bt.push(method(), 0, CHECK); 1607 set_backtrace(throwable(), bt.backtrace()); 1608 } 1609 return; 1610 } 1611 1612 // Instead of using vframe directly, this version of fill_in_stack_trace 1613 // basically handles everything by hand. This significantly improved the 1614 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows. 1615 // See bug 6333838 for more details. 1616 // The "ASSERT" here is to verify this method generates the exactly same stack 1617 // trace as utilizing vframe. 1618#ifdef ASSERT 1619 vframeStream st(thread); 1620 methodHandle st_method(THREAD, st.method()); 1621#endif 1622 int total_count = 0; 1623 RegisterMap map(thread, false); 1624 int decode_offset = 0; 1625 nmethod* nm = NULL; 1626 bool skip_fillInStackTrace_check = false; 1627 bool skip_throwableInit_check = false; 1628 bool skip_hidden = !ShowHiddenFrames; 1629 1630 for (frame fr = thread->last_frame(); max_depth != total_count;) { 1631 Method* method = NULL; 1632 int bci = 0; 1633 1634 // Compiled java method case. 1635 if (decode_offset != 0) { 1636 DebugInfoReadStream stream(nm, decode_offset); 1637 decode_offset = stream.read_int(); 1638 method = (Method*)nm->metadata_at(stream.read_int()); 1639 bci = stream.read_bci(); 1640 } else { 1641 if (fr.is_first_frame()) break; 1642 address pc = fr.pc(); 1643 if (fr.is_interpreted_frame()) { 1644 address bcp = fr.interpreter_frame_bcp(); 1645 method = fr.interpreter_frame_method(); 1646 bci = method->bci_from(bcp); 1647 fr = fr.sender(&map); 1648 } else { 1649 CodeBlob* cb = fr.cb(); 1650 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL 1651 // but non nmethod 1652 fr = fr.sender(&map); 1653 if (cb == NULL || !cb->is_nmethod()) { 1654 continue; 1655 } 1656 nm = (nmethod*)cb; 1657 if (nm->method()->is_native()) { 1658 method = nm->method(); 1659 bci = 0; 1660 } else { 1661 PcDesc* pd = nm->pc_desc_at(pc); 1662 decode_offset = pd->scope_decode_offset(); 1663 // if decode_offset is not equal to 0, it will execute the 1664 // "compiled java method case" at the beginning of the loop. 1665 continue; 1666 } 1667 } 1668 } 1669#ifdef ASSERT 1670 assert(st_method() == method && st.bci() == bci, 1671 "Wrong stack trace"); 1672 st.next(); 1673 // vframeStream::method isn't GC-safe so store off a copy 1674 // of the Method* in case we GC. 1675 if (!st.at_end()) { 1676 st_method = st.method(); 1677 } 1678#endif 1679 1680 // the format of the stacktrace will be: 1681 // - 1 or more fillInStackTrace frames for the exception class (skipped) 1682 // - 0 or more <init> methods for the exception class (skipped) 1683 // - rest of the stack 1684 1685 if (!skip_fillInStackTrace_check) { 1686 if ((method->name() == vmSymbols::fillInStackTrace_name() || 1687 method->name() == vmSymbols::fillInStackTrace0_name()) && 1688 throwable->is_a(method->method_holder())) { 1689 continue; 1690 } 1691 else { 1692 skip_fillInStackTrace_check = true; // gone past them all 1693 } 1694 } 1695 if (!skip_throwableInit_check) { 1696 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering"); 1697 1698 // skip <init> methods of the exception class and superclasses 1699 // This is simlar to classic VM. 1700 if (method->name() == vmSymbols::object_initializer_name() && 1701 throwable->is_a(method->method_holder())) { 1702 continue; 1703 } else { 1704 // there are none or we've seen them all - either way stop checking 1705 skip_throwableInit_check = true; 1706 } 1707 } 1708 if (method->is_hidden()) { 1709 if (skip_hidden) continue; 1710 } 1711 bt.push(method, bci, CHECK); 1712 total_count++; 1713 } 1714 1715 // Put completed stack trace into throwable object 1716 set_backtrace(throwable(), bt.backtrace()); 1717} 1718 1719void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method) { 1720 // No-op if stack trace is disabled 1721 if (!StackTraceInThrowable) { 1722 return; 1723 } 1724 1725 // Disable stack traces for some preallocated out of memory errors 1726 if (!Universe::should_fill_in_stack_trace(throwable)) { 1727 return; 1728 } 1729 1730 PRESERVE_EXCEPTION_MARK; 1731 1732 JavaThread* thread = JavaThread::active(); 1733 fill_in_stack_trace(throwable, method, thread); 1734 // ignore exceptions thrown during stack trace filling 1735 CLEAR_PENDING_EXCEPTION; 1736} 1737 1738void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 1739 // Allocate stack trace - backtrace is created but not filled in 1740 1741 // No-op if stack trace is disabled 1742 if (!StackTraceInThrowable) return; 1743 BacktraceBuilder bt(CHECK); // creates a backtrace 1744 set_backtrace(throwable(), bt.backtrace()); 1745} 1746 1747 1748void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 1749 // Fill in stack trace into preallocated backtrace (no GC) 1750 1751 // No-op if stack trace is disabled 1752 if (!StackTraceInThrowable) return; 1753 1754 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check"); 1755 1756 JavaThread* THREAD = JavaThread::current(); 1757 1758 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable())); 1759 assert(backtrace.not_null(), "backtrace should have been preallocated"); 1760 1761 ResourceMark rm(THREAD); 1762 vframeStream st(THREAD); 1763 1764 BacktraceBuilder bt(backtrace); 1765 1766 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 1767 // methods as preallocated errors aren't created by "java" code. 1768 1769 // fill in as much stack trace as possible 1770 typeArrayOop methods = BacktraceBuilder::get_methods(backtrace); 1771 int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth); 1772 int chunk_count = 0; 1773 1774 for (;!st.at_end(); st.next()) { 1775 bt.push(st.method(), st.bci(), CHECK); 1776 chunk_count++; 1777 1778 // Bail-out for deep stacks 1779 if (chunk_count >= max_chunks) break; 1780 } 1781 1782 // We support the Throwable immutability protocol defined for Java 7. 1783 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace()); 1784 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized"); 1785} 1786 1787 1788int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) { 1789 if (throwable == NULL) { 1790 THROW_0(vmSymbols::java_lang_NullPointerException()); 1791 } 1792 objArrayOop chunk = objArrayOop(backtrace(throwable)); 1793 int depth = 0; 1794 if (chunk != NULL) { 1795 // Iterate over chunks and count full ones 1796 while (true) { 1797 objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset)); 1798 if (next == NULL) break; 1799 depth += trace_chunk_size; 1800 chunk = next; 1801 } 1802 assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check"); 1803 // Count element in remaining partial chunk. NULL value for mirror 1804 // marks the end of the stack trace elements that are saved. 1805 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk); 1806 assert(mirrors != NULL, "sanity check"); 1807 for (int i = 0; i < mirrors->length(); i++) { 1808 if (mirrors->obj_at(i) == NULL) break; 1809 depth++; 1810 } 1811 } 1812 return depth; 1813} 1814 1815 1816oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) { 1817 if (throwable == NULL) { 1818 THROW_0(vmSymbols::java_lang_NullPointerException()); 1819 } 1820 if (index < 0) { 1821 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 1822 } 1823 // Compute how many chunks to skip and index into actual chunk 1824 objArrayOop chunk = objArrayOop(backtrace(throwable)); 1825 int skip_chunks = index / trace_chunk_size; 1826 int chunk_index = index % trace_chunk_size; 1827 while (chunk != NULL && skip_chunks > 0) { 1828 chunk = objArrayOop(chunk->obj_at(trace_next_offset)); 1829 skip_chunks--; 1830 } 1831 if (chunk == NULL) { 1832 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 1833 } 1834 // Get method id, bci, version and mirror from chunk 1835 typeArrayOop methods = BacktraceBuilder::get_methods(chunk); 1836 typeArrayOop bcis = BacktraceBuilder::get_bcis(chunk); 1837 objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk); 1838 1839 assert(methods != NULL && bcis != NULL && mirrors != NULL, "sanity check"); 1840 1841 int method = methods->short_at(chunk_index); 1842 int version = version_at(bcis->int_at(chunk_index)); 1843 int bci = bci_at(bcis->int_at(chunk_index)); 1844 Handle mirror(THREAD, mirrors->obj_at(chunk_index)); 1845 1846 // Chunk can be partial full 1847 if (mirror.is_null()) { 1848 THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL); 1849 } 1850 1851 oop element = java_lang_StackTraceElement::create(mirror, method, version, bci, CHECK_0); 1852 return element; 1853} 1854 1855oop java_lang_StackTraceElement::create(Handle mirror, int method_id, 1856 int version, int bci, TRAPS) { 1857 // Allocate java.lang.StackTraceElement instance 1858 Klass* k = SystemDictionary::StackTraceElement_klass(); 1859 assert(k != NULL, "must be loaded in 1.4+"); 1860 instanceKlassHandle ik (THREAD, k); 1861 if (ik->should_be_initialized()) { 1862 ik->initialize(CHECK_0); 1863 } 1864 1865 Handle element = ik->allocate_instance_handle(CHECK_0); 1866 // Fill in class name 1867 ResourceMark rm(THREAD); 1868 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 1869 const char* str = holder->external_name(); 1870 oop classname = StringTable::intern((char*) str, CHECK_0); 1871 java_lang_StackTraceElement::set_declaringClass(element(), classname); 1872 1873 Method* method = holder->method_with_idnum(method_id); 1874 // Method on stack may be obsolete because it was redefined so cannot be 1875 // found by idnum. 1876 if (method == NULL) { 1877 // leave name and fileName null 1878 java_lang_StackTraceElement::set_lineNumber(element(), -1); 1879 return element(); 1880 } 1881 1882 // Fill in method name 1883 oop methodname = StringTable::intern(method->name(), CHECK_0); 1884 java_lang_StackTraceElement::set_methodName(element(), methodname); 1885 1886 if (!version_matches(method, version)) { 1887 // The method was redefined, accurate line number information isn't available 1888 java_lang_StackTraceElement::set_fileName(element(), NULL); 1889 java_lang_StackTraceElement::set_lineNumber(element(), -1); 1890 } else { 1891 // Fill in source file name and line number. 1892 Symbol* source = holder->source_file_name(); 1893 if (ShowHiddenFrames && source == NULL) 1894 source = vmSymbols::unknown_class_name(); 1895 oop filename = StringTable::intern(source, CHECK_0); 1896 java_lang_StackTraceElement::set_fileName(element(), filename); 1897 1898 int line_number = get_line_number(method, bci); 1899 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 1900 } 1901 return element(); 1902} 1903 1904oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) { 1905 Handle mirror (THREAD, method->method_holder()->java_mirror()); 1906 int method_id = method->method_idnum(); 1907 return create(mirror, method_id, method->constants()->version(), bci, THREAD); 1908} 1909 1910void java_lang_reflect_AccessibleObject::compute_offsets() { 1911 Klass* k = SystemDictionary::reflect_AccessibleObject_klass(); 1912 compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature()); 1913} 1914 1915jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 1916 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1917 return (jboolean) reflect->bool_field(override_offset); 1918} 1919 1920void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 1921 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1922 reflect->bool_field_put(override_offset, (int) value); 1923} 1924 1925void java_lang_reflect_Method::compute_offsets() { 1926 Klass* k = SystemDictionary::reflect_Method_klass(); 1927 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 1928 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 1929 compute_offset(returnType_offset, k, vmSymbols::returnType_name(), vmSymbols::class_signature()); 1930 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 1931 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 1932 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 1933 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 1934 // The generic signature and annotations fields are only present in 1.5 1935 signature_offset = -1; 1936 annotations_offset = -1; 1937 parameter_annotations_offset = -1; 1938 annotation_default_offset = -1; 1939 type_annotations_offset = -1; 1940 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 1941 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 1942 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 1943 compute_optional_offset(annotation_default_offset, k, vmSymbols::annotation_default_name(), vmSymbols::byte_array_signature()); 1944 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 1945} 1946 1947Handle java_lang_reflect_Method::create(TRAPS) { 1948 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1949 Klass* klass = SystemDictionary::reflect_Method_klass(); 1950 // This class is eagerly initialized during VM initialization, since we keep a refence 1951 // to one of the methods 1952 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized"); 1953 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD); 1954} 1955 1956oop java_lang_reflect_Method::clazz(oop reflect) { 1957 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1958 return reflect->obj_field(clazz_offset); 1959} 1960 1961void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 1962 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1963 reflect->obj_field_put(clazz_offset, value); 1964} 1965 1966int java_lang_reflect_Method::slot(oop reflect) { 1967 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1968 return reflect->int_field(slot_offset); 1969} 1970 1971void java_lang_reflect_Method::set_slot(oop reflect, int value) { 1972 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1973 reflect->int_field_put(slot_offset, value); 1974} 1975 1976oop java_lang_reflect_Method::name(oop method) { 1977 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1978 return method->obj_field(name_offset); 1979} 1980 1981void java_lang_reflect_Method::set_name(oop method, oop value) { 1982 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1983 method->obj_field_put(name_offset, value); 1984} 1985 1986oop java_lang_reflect_Method::return_type(oop method) { 1987 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1988 return method->obj_field(returnType_offset); 1989} 1990 1991void java_lang_reflect_Method::set_return_type(oop method, oop value) { 1992 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1993 method->obj_field_put(returnType_offset, value); 1994} 1995 1996oop java_lang_reflect_Method::parameter_types(oop method) { 1997 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 1998 return method->obj_field(parameterTypes_offset); 1999} 2000 2001void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 2002 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2003 method->obj_field_put(parameterTypes_offset, value); 2004} 2005 2006oop java_lang_reflect_Method::exception_types(oop method) { 2007 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2008 return method->obj_field(exceptionTypes_offset); 2009} 2010 2011void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 2012 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2013 method->obj_field_put(exceptionTypes_offset, value); 2014} 2015 2016int java_lang_reflect_Method::modifiers(oop method) { 2017 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2018 return method->int_field(modifiers_offset); 2019} 2020 2021void java_lang_reflect_Method::set_modifiers(oop method, int value) { 2022 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2023 method->int_field_put(modifiers_offset, value); 2024} 2025 2026bool java_lang_reflect_Method::has_signature_field() { 2027 return (signature_offset >= 0); 2028} 2029 2030oop java_lang_reflect_Method::signature(oop method) { 2031 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2032 assert(has_signature_field(), "signature field must be present"); 2033 return method->obj_field(signature_offset); 2034} 2035 2036void java_lang_reflect_Method::set_signature(oop method, oop value) { 2037 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2038 assert(has_signature_field(), "signature field must be present"); 2039 method->obj_field_put(signature_offset, value); 2040} 2041 2042bool java_lang_reflect_Method::has_annotations_field() { 2043 return (annotations_offset >= 0); 2044} 2045 2046oop java_lang_reflect_Method::annotations(oop method) { 2047 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2048 assert(has_annotations_field(), "annotations field must be present"); 2049 return method->obj_field(annotations_offset); 2050} 2051 2052void java_lang_reflect_Method::set_annotations(oop method, oop value) { 2053 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2054 assert(has_annotations_field(), "annotations field must be present"); 2055 method->obj_field_put(annotations_offset, value); 2056} 2057 2058bool java_lang_reflect_Method::has_parameter_annotations_field() { 2059 return (parameter_annotations_offset >= 0); 2060} 2061 2062oop java_lang_reflect_Method::parameter_annotations(oop method) { 2063 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2064 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2065 return method->obj_field(parameter_annotations_offset); 2066} 2067 2068void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 2069 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2070 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2071 method->obj_field_put(parameter_annotations_offset, value); 2072} 2073 2074bool java_lang_reflect_Method::has_annotation_default_field() { 2075 return (annotation_default_offset >= 0); 2076} 2077 2078oop java_lang_reflect_Method::annotation_default(oop method) { 2079 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2080 assert(has_annotation_default_field(), "annotation default field must be present"); 2081 return method->obj_field(annotation_default_offset); 2082} 2083 2084void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 2085 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2086 assert(has_annotation_default_field(), "annotation default field must be present"); 2087 method->obj_field_put(annotation_default_offset, value); 2088} 2089 2090bool java_lang_reflect_Method::has_type_annotations_field() { 2091 return (type_annotations_offset >= 0); 2092} 2093 2094oop java_lang_reflect_Method::type_annotations(oop method) { 2095 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2096 assert(has_type_annotations_field(), "type_annotations field must be present"); 2097 return method->obj_field(type_annotations_offset); 2098} 2099 2100void java_lang_reflect_Method::set_type_annotations(oop method, oop value) { 2101 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2102 assert(has_type_annotations_field(), "type_annotations field must be present"); 2103 method->obj_field_put(type_annotations_offset, value); 2104} 2105 2106void java_lang_reflect_Constructor::compute_offsets() { 2107 Klass* k = SystemDictionary::reflect_Constructor_klass(); 2108 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2109 compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature()); 2110 compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature()); 2111 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 2112 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2113 // The generic signature and annotations fields are only present in 1.5 2114 signature_offset = -1; 2115 annotations_offset = -1; 2116 parameter_annotations_offset = -1; 2117 type_annotations_offset = -1; 2118 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 2119 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 2120 compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature()); 2121 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 2122} 2123 2124Handle java_lang_reflect_Constructor::create(TRAPS) { 2125 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2126 Symbol* name = vmSymbols::java_lang_reflect_Constructor(); 2127 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2128 instanceKlassHandle klass (THREAD, k); 2129 // Ensure it is initialized 2130 klass->initialize(CHECK_NH); 2131 return klass->allocate_instance_handle(THREAD); 2132} 2133 2134oop java_lang_reflect_Constructor::clazz(oop reflect) { 2135 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2136 return reflect->obj_field(clazz_offset); 2137} 2138 2139void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 2140 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2141 reflect->obj_field_put(clazz_offset, value); 2142} 2143 2144oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 2145 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2146 return constructor->obj_field(parameterTypes_offset); 2147} 2148 2149void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 2150 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2151 constructor->obj_field_put(parameterTypes_offset, value); 2152} 2153 2154oop java_lang_reflect_Constructor::exception_types(oop constructor) { 2155 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2156 return constructor->obj_field(exceptionTypes_offset); 2157} 2158 2159void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 2160 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2161 constructor->obj_field_put(exceptionTypes_offset, value); 2162} 2163 2164int java_lang_reflect_Constructor::slot(oop reflect) { 2165 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2166 return reflect->int_field(slot_offset); 2167} 2168 2169void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 2170 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2171 reflect->int_field_put(slot_offset, value); 2172} 2173 2174int java_lang_reflect_Constructor::modifiers(oop constructor) { 2175 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2176 return constructor->int_field(modifiers_offset); 2177} 2178 2179void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 2180 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2181 constructor->int_field_put(modifiers_offset, value); 2182} 2183 2184bool java_lang_reflect_Constructor::has_signature_field() { 2185 return (signature_offset >= 0); 2186} 2187 2188oop java_lang_reflect_Constructor::signature(oop constructor) { 2189 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2190 assert(has_signature_field(), "signature field must be present"); 2191 return constructor->obj_field(signature_offset); 2192} 2193 2194void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 2195 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2196 assert(has_signature_field(), "signature field must be present"); 2197 constructor->obj_field_put(signature_offset, value); 2198} 2199 2200bool java_lang_reflect_Constructor::has_annotations_field() { 2201 return (annotations_offset >= 0); 2202} 2203 2204oop java_lang_reflect_Constructor::annotations(oop constructor) { 2205 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2206 assert(has_annotations_field(), "annotations field must be present"); 2207 return constructor->obj_field(annotations_offset); 2208} 2209 2210void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 2211 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2212 assert(has_annotations_field(), "annotations field must be present"); 2213 constructor->obj_field_put(annotations_offset, value); 2214} 2215 2216bool java_lang_reflect_Constructor::has_parameter_annotations_field() { 2217 return (parameter_annotations_offset >= 0); 2218} 2219 2220oop java_lang_reflect_Constructor::parameter_annotations(oop method) { 2221 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2222 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2223 return method->obj_field(parameter_annotations_offset); 2224} 2225 2226void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 2227 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2228 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2229 method->obj_field_put(parameter_annotations_offset, value); 2230} 2231 2232bool java_lang_reflect_Constructor::has_type_annotations_field() { 2233 return (type_annotations_offset >= 0); 2234} 2235 2236oop java_lang_reflect_Constructor::type_annotations(oop constructor) { 2237 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2238 assert(has_type_annotations_field(), "type_annotations field must be present"); 2239 return constructor->obj_field(type_annotations_offset); 2240} 2241 2242void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) { 2243 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2244 assert(has_type_annotations_field(), "type_annotations field must be present"); 2245 constructor->obj_field_put(type_annotations_offset, value); 2246} 2247 2248void java_lang_reflect_Field::compute_offsets() { 2249 Klass* k = SystemDictionary::reflect_Field_klass(); 2250 compute_offset(clazz_offset, k, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2251 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2252 compute_offset(type_offset, k, vmSymbols::type_name(), vmSymbols::class_signature()); 2253 compute_offset(slot_offset, k, vmSymbols::slot_name(), vmSymbols::int_signature()); 2254 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2255 // The generic signature and annotations fields are only present in 1.5 2256 signature_offset = -1; 2257 annotations_offset = -1; 2258 type_annotations_offset = -1; 2259 compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature()); 2260 compute_optional_offset(annotations_offset, k, vmSymbols::annotations_name(), vmSymbols::byte_array_signature()); 2261 compute_optional_offset(type_annotations_offset, k, vmSymbols::type_annotations_name(), vmSymbols::byte_array_signature()); 2262} 2263 2264Handle java_lang_reflect_Field::create(TRAPS) { 2265 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2266 Symbol* name = vmSymbols::java_lang_reflect_Field(); 2267 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2268 instanceKlassHandle klass (THREAD, k); 2269 // Ensure it is initialized 2270 klass->initialize(CHECK_NH); 2271 return klass->allocate_instance_handle(THREAD); 2272} 2273 2274oop java_lang_reflect_Field::clazz(oop reflect) { 2275 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2276 return reflect->obj_field(clazz_offset); 2277} 2278 2279void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 2280 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2281 reflect->obj_field_put(clazz_offset, value); 2282} 2283 2284oop java_lang_reflect_Field::name(oop field) { 2285 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2286 return field->obj_field(name_offset); 2287} 2288 2289void java_lang_reflect_Field::set_name(oop field, oop value) { 2290 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2291 field->obj_field_put(name_offset, value); 2292} 2293 2294oop java_lang_reflect_Field::type(oop field) { 2295 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2296 return field->obj_field(type_offset); 2297} 2298 2299void java_lang_reflect_Field::set_type(oop field, oop value) { 2300 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2301 field->obj_field_put(type_offset, value); 2302} 2303 2304int java_lang_reflect_Field::slot(oop reflect) { 2305 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2306 return reflect->int_field(slot_offset); 2307} 2308 2309void java_lang_reflect_Field::set_slot(oop reflect, int value) { 2310 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2311 reflect->int_field_put(slot_offset, value); 2312} 2313 2314int java_lang_reflect_Field::modifiers(oop field) { 2315 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2316 return field->int_field(modifiers_offset); 2317} 2318 2319void java_lang_reflect_Field::set_modifiers(oop field, int value) { 2320 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2321 field->int_field_put(modifiers_offset, value); 2322} 2323 2324bool java_lang_reflect_Field::has_signature_field() { 2325 return (signature_offset >= 0); 2326} 2327 2328oop java_lang_reflect_Field::signature(oop field) { 2329 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2330 assert(has_signature_field(), "signature field must be present"); 2331 return field->obj_field(signature_offset); 2332} 2333 2334void java_lang_reflect_Field::set_signature(oop field, oop value) { 2335 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2336 assert(has_signature_field(), "signature field must be present"); 2337 field->obj_field_put(signature_offset, value); 2338} 2339 2340bool java_lang_reflect_Field::has_annotations_field() { 2341 return (annotations_offset >= 0); 2342} 2343 2344oop java_lang_reflect_Field::annotations(oop field) { 2345 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2346 assert(has_annotations_field(), "annotations field must be present"); 2347 return field->obj_field(annotations_offset); 2348} 2349 2350void java_lang_reflect_Field::set_annotations(oop field, oop value) { 2351 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2352 assert(has_annotations_field(), "annotations field must be present"); 2353 field->obj_field_put(annotations_offset, value); 2354} 2355 2356bool java_lang_reflect_Field::has_type_annotations_field() { 2357 return (type_annotations_offset >= 0); 2358} 2359 2360oop java_lang_reflect_Field::type_annotations(oop field) { 2361 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2362 assert(has_type_annotations_field(), "type_annotations field must be present"); 2363 return field->obj_field(type_annotations_offset); 2364} 2365 2366void java_lang_reflect_Field::set_type_annotations(oop field, oop value) { 2367 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2368 assert(has_type_annotations_field(), "type_annotations field must be present"); 2369 field->obj_field_put(type_annotations_offset, value); 2370} 2371 2372void sun_reflect_ConstantPool::compute_offsets() { 2373 Klass* k = SystemDictionary::reflect_ConstantPool_klass(); 2374 // This null test can be removed post beta 2375 if (k != NULL) { 2376 // The field is called ConstantPool* in the sun.reflect.ConstantPool class. 2377 compute_offset(_oop_offset, k, vmSymbols::ConstantPool_name(), vmSymbols::object_signature()); 2378 } 2379} 2380 2381void java_lang_reflect_Parameter::compute_offsets() { 2382 Klass* k = SystemDictionary::reflect_Parameter_klass(); 2383 if(NULL != k) { 2384 compute_offset(name_offset, k, vmSymbols::name_name(), vmSymbols::string_signature()); 2385 compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature()); 2386 compute_offset(index_offset, k, vmSymbols::index_name(), vmSymbols::int_signature()); 2387 compute_offset(executable_offset, k, vmSymbols::executable_name(), vmSymbols::executable_signature()); 2388 } 2389} 2390 2391Handle java_lang_reflect_Parameter::create(TRAPS) { 2392 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2393 Symbol* name = vmSymbols::java_lang_reflect_Parameter(); 2394 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2395 instanceKlassHandle klass (THREAD, k); 2396 // Ensure it is initialized 2397 klass->initialize(CHECK_NH); 2398 return klass->allocate_instance_handle(THREAD); 2399} 2400 2401oop java_lang_reflect_Parameter::name(oop param) { 2402 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2403 return param->obj_field(name_offset); 2404} 2405 2406void java_lang_reflect_Parameter::set_name(oop param, oop value) { 2407 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2408 param->obj_field_put(name_offset, value); 2409} 2410 2411int java_lang_reflect_Parameter::modifiers(oop param) { 2412 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2413 return param->int_field(modifiers_offset); 2414} 2415 2416void java_lang_reflect_Parameter::set_modifiers(oop param, int value) { 2417 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2418 param->int_field_put(modifiers_offset, value); 2419} 2420 2421int java_lang_reflect_Parameter::index(oop param) { 2422 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2423 return param->int_field(index_offset); 2424} 2425 2426void java_lang_reflect_Parameter::set_index(oop param, int value) { 2427 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2428 param->int_field_put(index_offset, value); 2429} 2430 2431oop java_lang_reflect_Parameter::executable(oop param) { 2432 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2433 return param->obj_field(executable_offset); 2434} 2435 2436void java_lang_reflect_Parameter::set_executable(oop param, oop value) { 2437 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2438 param->obj_field_put(executable_offset, value); 2439} 2440 2441 2442Handle sun_reflect_ConstantPool::create(TRAPS) { 2443 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2444 Klass* k = SystemDictionary::reflect_ConstantPool_klass(); 2445 instanceKlassHandle klass (THREAD, k); 2446 // Ensure it is initialized 2447 klass->initialize(CHECK_NH); 2448 return klass->allocate_instance_handle(THREAD); 2449} 2450 2451 2452void sun_reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) { 2453 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2454 oop mirror = value->pool_holder()->java_mirror(); 2455 // Save the mirror to get back the constant pool. 2456 reflect->obj_field_put(_oop_offset, mirror); 2457} 2458 2459ConstantPool* sun_reflect_ConstantPool::get_cp(oop reflect) { 2460 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2461 2462 oop mirror = reflect->obj_field(_oop_offset); 2463 Klass* k = java_lang_Class::as_Klass(mirror); 2464 assert(k->oop_is_instance(), "Must be"); 2465 2466 // Get the constant pool back from the klass. Since class redefinition 2467 // merges the new constant pool into the old, this is essentially the 2468 // same constant pool as the original. If constant pool merging is 2469 // no longer done in the future, this will have to change to save 2470 // the original. 2471 return InstanceKlass::cast(k)->constants(); 2472} 2473 2474void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() { 2475 Klass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass(); 2476 // This null test can be removed post beta 2477 if (k != NULL) { 2478 compute_offset(_base_offset, k, 2479 vmSymbols::base_name(), vmSymbols::object_signature()); 2480 } 2481} 2482 2483oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 2484 Klass* k = SystemDictionary::box_klass(type); 2485 if (k == NULL) return NULL; 2486 instanceKlassHandle h (THREAD, k); 2487 if (!h->is_initialized()) h->initialize(CHECK_0); 2488 return h->allocate_instance(THREAD); 2489} 2490 2491 2492oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 2493 oop box = initialize_and_allocate(type, CHECK_0); 2494 if (box == NULL) return NULL; 2495 switch (type) { 2496 case T_BOOLEAN: 2497 box->bool_field_put(value_offset, value->z); 2498 break; 2499 case T_CHAR: 2500 box->char_field_put(value_offset, value->c); 2501 break; 2502 case T_FLOAT: 2503 box->float_field_put(value_offset, value->f); 2504 break; 2505 case T_DOUBLE: 2506 box->double_field_put(long_value_offset, value->d); 2507 break; 2508 case T_BYTE: 2509 box->byte_field_put(value_offset, value->b); 2510 break; 2511 case T_SHORT: 2512 box->short_field_put(value_offset, value->s); 2513 break; 2514 case T_INT: 2515 box->int_field_put(value_offset, value->i); 2516 break; 2517 case T_LONG: 2518 box->long_field_put(long_value_offset, value->j); 2519 break; 2520 default: 2521 return NULL; 2522 } 2523 return box; 2524} 2525 2526 2527BasicType java_lang_boxing_object::basic_type(oop box) { 2528 if (box == NULL) return T_ILLEGAL; 2529 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2530 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 2531 return T_ILLEGAL; 2532 return type; 2533} 2534 2535 2536BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 2537 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2538 switch (type) { 2539 case T_BOOLEAN: 2540 value->z = box->bool_field(value_offset); 2541 break; 2542 case T_CHAR: 2543 value->c = box->char_field(value_offset); 2544 break; 2545 case T_FLOAT: 2546 value->f = box->float_field(value_offset); 2547 break; 2548 case T_DOUBLE: 2549 value->d = box->double_field(long_value_offset); 2550 break; 2551 case T_BYTE: 2552 value->b = box->byte_field(value_offset); 2553 break; 2554 case T_SHORT: 2555 value->s = box->short_field(value_offset); 2556 break; 2557 case T_INT: 2558 value->i = box->int_field(value_offset); 2559 break; 2560 case T_LONG: 2561 value->j = box->long_field(long_value_offset); 2562 break; 2563 default: 2564 return T_ILLEGAL; 2565 } // end switch 2566 return type; 2567} 2568 2569 2570BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 2571 BasicType type = SystemDictionary::box_klass_type(box->klass()); 2572 switch (type) { 2573 case T_BOOLEAN: 2574 box->bool_field_put(value_offset, value->z); 2575 break; 2576 case T_CHAR: 2577 box->char_field_put(value_offset, value->c); 2578 break; 2579 case T_FLOAT: 2580 box->float_field_put(value_offset, value->f); 2581 break; 2582 case T_DOUBLE: 2583 box->double_field_put(long_value_offset, value->d); 2584 break; 2585 case T_BYTE: 2586 box->byte_field_put(value_offset, value->b); 2587 break; 2588 case T_SHORT: 2589 box->short_field_put(value_offset, value->s); 2590 break; 2591 case T_INT: 2592 box->int_field_put(value_offset, value->i); 2593 break; 2594 case T_LONG: 2595 box->long_field_put(long_value_offset, value->j); 2596 break; 2597 default: 2598 return T_ILLEGAL; 2599 } // end switch 2600 return type; 2601} 2602 2603 2604void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) { 2605 switch (type) { 2606 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break; 2607 case T_CHAR: st->print("%d", value->c); break; 2608 case T_BYTE: st->print("%d", value->b); break; 2609 case T_SHORT: st->print("%d", value->s); break; 2610 case T_INT: st->print("%d", value->i); break; 2611 case T_LONG: st->print(INT64_FORMAT, value->j); break; 2612 case T_FLOAT: st->print("%f", value->f); break; 2613 case T_DOUBLE: st->print("%lf", value->d); break; 2614 default: st->print("type %d?", type); break; 2615 } 2616} 2617 2618 2619// Support for java_lang_ref_Reference 2620HeapWord *java_lang_ref_Reference::pending_list_lock_addr() { 2621 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass()); 2622 address addr = ik->static_field_addr(static_lock_offset); 2623 return (HeapWord*) addr; 2624} 2625 2626oop java_lang_ref_Reference::pending_list_lock() { 2627 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass()); 2628 address addr = ik->static_field_addr(static_lock_offset); 2629 if (UseCompressedOops) { 2630 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 2631 } else { 2632 return oopDesc::load_decode_heap_oop((oop*)addr); 2633 } 2634} 2635 2636HeapWord *java_lang_ref_Reference::pending_list_addr() { 2637 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass()); 2638 address addr = ik->static_field_addr(static_pending_offset); 2639 // XXX This might not be HeapWord aligned, almost rather be char *. 2640 return (HeapWord*)addr; 2641} 2642 2643oop java_lang_ref_Reference::pending_list() { 2644 char *addr = (char *)pending_list_addr(); 2645 if (UseCompressedOops) { 2646 return oopDesc::load_decode_heap_oop((narrowOop *)addr); 2647 } else { 2648 return oopDesc::load_decode_heap_oop((oop*)addr); 2649 } 2650} 2651 2652 2653// Support for java_lang_ref_SoftReference 2654 2655jlong java_lang_ref_SoftReference::timestamp(oop ref) { 2656 return ref->long_field(timestamp_offset); 2657} 2658 2659jlong java_lang_ref_SoftReference::clock() { 2660 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass()); 2661 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset); 2662 return *offset; 2663} 2664 2665void java_lang_ref_SoftReference::set_clock(jlong value) { 2666 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass()); 2667 jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset); 2668 *offset = value; 2669} 2670 2671// Support for java_lang_invoke_DirectMethodHandle 2672 2673int java_lang_invoke_DirectMethodHandle::_member_offset; 2674 2675oop java_lang_invoke_DirectMethodHandle::member(oop dmh) { 2676 oop member_name = NULL; 2677 bool is_dmh = dmh->is_oop() && java_lang_invoke_DirectMethodHandle::is_instance(dmh); 2678 assert(is_dmh, "a DirectMethodHandle oop is expected"); 2679 if (is_dmh) { 2680 member_name = dmh->obj_field(member_offset_in_bytes()); 2681 } 2682 return member_name; 2683} 2684 2685void java_lang_invoke_DirectMethodHandle::compute_offsets() { 2686 Klass* klass_oop = SystemDictionary::DirectMethodHandle_klass(); 2687 if (klass_oop != NULL) { 2688 compute_offset(_member_offset, klass_oop, vmSymbols::member_name(), vmSymbols::java_lang_invoke_MemberName_signature()); 2689 } 2690} 2691 2692// Support for java_lang_invoke_MethodHandle 2693 2694int java_lang_invoke_MethodHandle::_type_offset; 2695int java_lang_invoke_MethodHandle::_form_offset; 2696 2697int java_lang_invoke_MemberName::_clazz_offset; 2698int java_lang_invoke_MemberName::_name_offset; 2699int java_lang_invoke_MemberName::_type_offset; 2700int java_lang_invoke_MemberName::_flags_offset; 2701int java_lang_invoke_MemberName::_vmtarget_offset; 2702int java_lang_invoke_MemberName::_vmloader_offset; 2703int java_lang_invoke_MemberName::_vmindex_offset; 2704 2705int java_lang_invoke_LambdaForm::_vmentry_offset; 2706 2707void java_lang_invoke_MethodHandle::compute_offsets() { 2708 Klass* klass_oop = SystemDictionary::MethodHandle_klass(); 2709 if (klass_oop != NULL) { 2710 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature()); 2711 compute_offset(_form_offset, klass_oop, vmSymbols::form_name(), vmSymbols::java_lang_invoke_LambdaForm_signature()); 2712 } 2713} 2714 2715void java_lang_invoke_MemberName::compute_offsets() { 2716 Klass* klass_oop = SystemDictionary::MemberName_klass(); 2717 if (klass_oop != NULL) { 2718 compute_offset(_clazz_offset, klass_oop, vmSymbols::clazz_name(), vmSymbols::class_signature()); 2719 compute_offset(_name_offset, klass_oop, vmSymbols::name_name(), vmSymbols::string_signature()); 2720 compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::object_signature()); 2721 compute_offset(_flags_offset, klass_oop, vmSymbols::flags_name(), vmSymbols::int_signature()); 2722 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 2723 } 2724} 2725 2726void java_lang_invoke_LambdaForm::compute_offsets() { 2727 Klass* klass_oop = SystemDictionary::LambdaForm_klass(); 2728 if (klass_oop != NULL) { 2729 compute_offset(_vmentry_offset, klass_oop, vmSymbols::vmentry_name(), vmSymbols::java_lang_invoke_MemberName_signature()); 2730 } 2731} 2732 2733oop java_lang_invoke_MethodHandle::type(oop mh) { 2734 return mh->obj_field(_type_offset); 2735} 2736 2737void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) { 2738 mh->obj_field_put(_type_offset, mtype); 2739} 2740 2741oop java_lang_invoke_MethodHandle::form(oop mh) { 2742 assert(_form_offset != 0, ""); 2743 return mh->obj_field(_form_offset); 2744} 2745 2746void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) { 2747 assert(_form_offset != 0, ""); 2748 mh->obj_field_put(_form_offset, lform); 2749} 2750 2751/// MemberName accessors 2752 2753oop java_lang_invoke_MemberName::clazz(oop mname) { 2754 assert(is_instance(mname), "wrong type"); 2755 return mname->obj_field(_clazz_offset); 2756} 2757 2758void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) { 2759 assert(is_instance(mname), "wrong type"); 2760 mname->obj_field_put(_clazz_offset, clazz); 2761} 2762 2763oop java_lang_invoke_MemberName::name(oop mname) { 2764 assert(is_instance(mname), "wrong type"); 2765 return mname->obj_field(_name_offset); 2766} 2767 2768void java_lang_invoke_MemberName::set_name(oop mname, oop name) { 2769 assert(is_instance(mname), "wrong type"); 2770 mname->obj_field_put(_name_offset, name); 2771} 2772 2773oop java_lang_invoke_MemberName::type(oop mname) { 2774 assert(is_instance(mname), "wrong type"); 2775 return mname->obj_field(_type_offset); 2776} 2777 2778void java_lang_invoke_MemberName::set_type(oop mname, oop type) { 2779 assert(is_instance(mname), "wrong type"); 2780 mname->obj_field_put(_type_offset, type); 2781} 2782 2783int java_lang_invoke_MemberName::flags(oop mname) { 2784 assert(is_instance(mname), "wrong type"); 2785 return mname->int_field(_flags_offset); 2786} 2787 2788void java_lang_invoke_MemberName::set_flags(oop mname, int flags) { 2789 assert(is_instance(mname), "wrong type"); 2790 mname->int_field_put(_flags_offset, flags); 2791} 2792 2793Metadata* java_lang_invoke_MemberName::vmtarget(oop mname) { 2794 assert(is_instance(mname), "wrong type"); 2795 return (Metadata*)mname->address_field(_vmtarget_offset); 2796} 2797 2798bool java_lang_invoke_MemberName::is_method(oop mname) { 2799 assert(is_instance(mname), "must be MemberName"); 2800 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0; 2801} 2802 2803#if INCLUDE_JVMTI 2804// Can be executed on VM thread only 2805void java_lang_invoke_MemberName::adjust_vmtarget(oop mname, Method* old_method, 2806 Method* new_method, bool* trace_name_printed) { 2807 assert(is_method(mname), "wrong type"); 2808 assert(Thread::current()->is_VM_thread(), "not VM thread"); 2809 2810 Method* target = (Method*)mname->address_field(_vmtarget_offset); 2811 if (target == old_method) { 2812 mname->address_field_put(_vmtarget_offset, (address)new_method); 2813 2814 if (RC_TRACE_IN_RANGE(0x00100000, 0x00400000)) { 2815 if (!(*trace_name_printed)) { 2816 // RC_TRACE_MESG macro has an embedded ResourceMark 2817 RC_TRACE_MESG(("adjust: name=%s", 2818 old_method->method_holder()->external_name())); 2819 *trace_name_printed = true; 2820 } 2821 // RC_TRACE macro has an embedded ResourceMark 2822 RC_TRACE(0x00400000, ("MemberName method update: %s(%s)", 2823 new_method->name()->as_C_string(), 2824 new_method->signature()->as_C_string())); 2825 } 2826 } 2827} 2828#endif // INCLUDE_JVMTI 2829 2830void java_lang_invoke_MemberName::set_vmtarget(oop mname, Metadata* ref) { 2831 assert(is_instance(mname), "wrong type"); 2832 // check the type of the vmtarget 2833 oop dependency = NULL; 2834 if (ref != NULL) { 2835 switch (flags(mname) & (MN_IS_METHOD | 2836 MN_IS_CONSTRUCTOR | 2837 MN_IS_FIELD)) { 2838 case MN_IS_METHOD: 2839 case MN_IS_CONSTRUCTOR: 2840 assert(ref->is_method(), "should be a method"); 2841 dependency = ((Method*)ref)->method_holder()->java_mirror(); 2842 break; 2843 case MN_IS_FIELD: 2844 assert(ref->is_klass(), "should be a class"); 2845 dependency = ((Klass*)ref)->java_mirror(); 2846 break; 2847 default: 2848 ShouldNotReachHere(); 2849 } 2850 } 2851 mname->address_field_put(_vmtarget_offset, (address)ref); 2852 // Add a reference to the loader (actually mirror because anonymous classes will not have 2853 // distinct loaders) to ensure the metadata is kept alive 2854 // This mirror may be different than the one in clazz field. 2855 mname->obj_field_put(_vmloader_offset, dependency); 2856} 2857 2858intptr_t java_lang_invoke_MemberName::vmindex(oop mname) { 2859 assert(is_instance(mname), "wrong type"); 2860 return (intptr_t) mname->address_field(_vmindex_offset); 2861} 2862 2863void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) { 2864 assert(is_instance(mname), "wrong type"); 2865 mname->address_field_put(_vmindex_offset, (address) index); 2866} 2867 2868oop java_lang_invoke_LambdaForm::vmentry(oop lform) { 2869 assert(is_instance(lform), "wrong type"); 2870 return lform->obj_field(_vmentry_offset); 2871} 2872 2873 2874// Support for java_lang_invoke_MethodType 2875 2876int java_lang_invoke_MethodType::_rtype_offset; 2877int java_lang_invoke_MethodType::_ptypes_offset; 2878 2879void java_lang_invoke_MethodType::compute_offsets() { 2880 Klass* k = SystemDictionary::MethodType_klass(); 2881 if (k != NULL) { 2882 compute_offset(_rtype_offset, k, vmSymbols::rtype_name(), vmSymbols::class_signature()); 2883 compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature()); 2884 } 2885} 2886 2887void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) { 2888 st->print("("); 2889 objArrayOop pts = ptypes(mt); 2890 for (int i = 0, limit = pts->length(); i < limit; i++) { 2891 java_lang_Class::print_signature(pts->obj_at(i), st); 2892 } 2893 st->print(")"); 2894 java_lang_Class::print_signature(rtype(mt), st); 2895} 2896 2897Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) { 2898 ResourceMark rm; 2899 stringStream buffer(128); 2900 print_signature(mt, &buffer); 2901 const char* sigstr = buffer.base(); 2902 int siglen = (int) buffer.size(); 2903 Symbol *name; 2904 if (!intern_if_not_found) { 2905 name = SymbolTable::probe(sigstr, siglen); 2906 } else { 2907 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 2908 } 2909 return name; 2910} 2911 2912bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) { 2913 if (mt1 == mt2) 2914 return true; 2915 if (rtype(mt1) != rtype(mt2)) 2916 return false; 2917 if (ptype_count(mt1) != ptype_count(mt2)) 2918 return false; 2919 for (int i = ptype_count(mt1) - 1; i >= 0; i--) { 2920 if (ptype(mt1, i) != ptype(mt2, i)) 2921 return false; 2922 } 2923 return true; 2924} 2925 2926oop java_lang_invoke_MethodType::rtype(oop mt) { 2927 assert(is_instance(mt), "must be a MethodType"); 2928 return mt->obj_field(_rtype_offset); 2929} 2930 2931objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) { 2932 assert(is_instance(mt), "must be a MethodType"); 2933 return (objArrayOop) mt->obj_field(_ptypes_offset); 2934} 2935 2936oop java_lang_invoke_MethodType::ptype(oop mt, int idx) { 2937 return ptypes(mt)->obj_at(idx); 2938} 2939 2940int java_lang_invoke_MethodType::ptype_count(oop mt) { 2941 return ptypes(mt)->length(); 2942} 2943 2944int java_lang_invoke_MethodType::ptype_slot_count(oop mt) { 2945 objArrayOop pts = ptypes(mt); 2946 int count = pts->length(); 2947 int slots = 0; 2948 for (int i = 0; i < count; i++) { 2949 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i)); 2950 slots += type2size[bt]; 2951 } 2952 return slots; 2953} 2954 2955int java_lang_invoke_MethodType::rtype_slot_count(oop mt) { 2956 BasicType bt = java_lang_Class::as_BasicType(rtype(mt)); 2957 return type2size[bt]; 2958} 2959 2960 2961// Support for java_lang_invoke_CallSite 2962 2963int java_lang_invoke_CallSite::_target_offset; 2964 2965void java_lang_invoke_CallSite::compute_offsets() { 2966 Klass* k = SystemDictionary::CallSite_klass(); 2967 if (k != NULL) { 2968 compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature()); 2969 } 2970} 2971 2972 2973// Support for java_security_AccessControlContext 2974 2975int java_security_AccessControlContext::_context_offset = 0; 2976int java_security_AccessControlContext::_privilegedContext_offset = 0; 2977int java_security_AccessControlContext::_isPrivileged_offset = 0; 2978int java_security_AccessControlContext::_isAuthorized_offset = -1; 2979 2980void java_security_AccessControlContext::compute_offsets() { 2981 assert(_isPrivileged_offset == 0, "offsets should be initialized only once"); 2982 fieldDescriptor fd; 2983 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass()); 2984 2985 if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) { 2986 fatal("Invalid layout of java.security.AccessControlContext"); 2987 } 2988 _context_offset = fd.offset(); 2989 2990 if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) { 2991 fatal("Invalid layout of java.security.AccessControlContext"); 2992 } 2993 _privilegedContext_offset = fd.offset(); 2994 2995 if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) { 2996 fatal("Invalid layout of java.security.AccessControlContext"); 2997 } 2998 _isPrivileged_offset = fd.offset(); 2999 3000 // The offset may not be present for bootstrapping with older JDK. 3001 if (ik->find_local_field(vmSymbols::isAuthorized_name(), vmSymbols::bool_signature(), &fd)) { 3002 _isAuthorized_offset = fd.offset(); 3003 } 3004} 3005 3006 3007bool java_security_AccessControlContext::is_authorized(Handle context) { 3008 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type"); 3009 assert(_isAuthorized_offset != -1, "should be set"); 3010 return context->bool_field(_isAuthorized_offset) != 0; 3011} 3012 3013oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) { 3014 assert(_isPrivileged_offset != 0, "offsets should have been initialized"); 3015 // Ensure klass is initialized 3016 InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->initialize(CHECK_0); 3017 // Allocate result 3018 oop result = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->allocate_instance(CHECK_0); 3019 // Fill in values 3020 result->obj_field_put(_context_offset, context()); 3021 result->obj_field_put(_privilegedContext_offset, privileged_context()); 3022 result->bool_field_put(_isPrivileged_offset, isPrivileged); 3023 // whitelist AccessControlContexts created by the JVM if present 3024 if (_isAuthorized_offset != -1) { 3025 result->bool_field_put(_isAuthorized_offset, true); 3026 } 3027 return result; 3028} 3029 3030 3031// Support for java_lang_ClassLoader 3032 3033bool java_lang_ClassLoader::offsets_computed = false; 3034int java_lang_ClassLoader::_loader_data_offset = -1; 3035int java_lang_ClassLoader::parallelCapable_offset = -1; 3036 3037ClassLoaderData** java_lang_ClassLoader::loader_data_addr(oop loader) { 3038 assert(loader != NULL && loader->is_oop(), "loader must be oop"); 3039 return (ClassLoaderData**) loader->address_field_addr(_loader_data_offset); 3040} 3041 3042ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) { 3043 return *java_lang_ClassLoader::loader_data_addr(loader); 3044} 3045 3046void java_lang_ClassLoader::compute_offsets() { 3047 assert(!offsets_computed, "offsets should be initialized only once"); 3048 offsets_computed = true; 3049 3050 // The field indicating parallelCapable (parallelLockMap) is only present starting in 7, 3051 Klass* k1 = SystemDictionary::ClassLoader_klass(); 3052 compute_optional_offset(parallelCapable_offset, 3053 k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature()); 3054 3055 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3056} 3057 3058oop java_lang_ClassLoader::parent(oop loader) { 3059 assert(is_instance(loader), "loader must be oop"); 3060 return loader->obj_field(parent_offset); 3061} 3062 3063bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) { 3064 assert(is_instance(loader), "loader must be oop"); 3065 assert(cl == NULL || is_instance(cl), "cl argument must be oop"); 3066 oop acl = loader; 3067 debug_only(jint loop_count = 0); 3068 // This loop taken verbatim from ClassLoader.java: 3069 do { 3070 acl = parent(acl); 3071 if (cl == acl) { 3072 return true; 3073 } 3074 assert(++loop_count > 0, "loop_count overflow"); 3075 } while (acl != NULL); 3076 return false; 3077} 3078 3079 3080// For class loader classes, parallelCapable defined 3081// based on non-null field 3082// Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it 3083bool java_lang_ClassLoader::parallelCapable(oop class_loader) { 3084 if (parallelCapable_offset == -1) { 3085 // Default for backward compatibility is false 3086 return false; 3087 } 3088 return (class_loader->obj_field(parallelCapable_offset) != NULL); 3089} 3090 3091bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 3092 // Fix for 4474172; see evaluation for more details 3093 loader = non_reflection_class_loader(loader); 3094 3095 oop cl = SystemDictionary::java_system_loader(); 3096 while(cl != NULL) { 3097 if (cl == loader) return true; 3098 cl = parent(cl); 3099 } 3100 return false; 3101} 3102 3103oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) { 3104 if (loader != NULL) { 3105 // See whether this is one of the class loaders associated with 3106 // the generated bytecodes for reflection, and if so, "magically" 3107 // delegate to its parent to prevent class loading from occurring 3108 // in places where applications using reflection didn't expect it. 3109 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass(); 3110 // This might be null in non-1.4 JDKs 3111 if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) { 3112 return parent(loader); 3113 } 3114 } 3115 return loader; 3116} 3117 3118 3119// Support for java_lang_System 3120int java_lang_System::in_offset_in_bytes() { 3121 return (InstanceMirrorKlass::offset_of_static_fields() + static_in_offset); 3122} 3123 3124 3125int java_lang_System::out_offset_in_bytes() { 3126 return (InstanceMirrorKlass::offset_of_static_fields() + static_out_offset); 3127} 3128 3129 3130int java_lang_System::err_offset_in_bytes() { 3131 return (InstanceMirrorKlass::offset_of_static_fields() + static_err_offset); 3132} 3133 3134 3135bool java_lang_System::has_security_manager() { 3136 InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::System_klass()); 3137 address addr = ik->static_field_addr(static_security_offset); 3138 if (UseCompressedOops) { 3139 return oopDesc::load_decode_heap_oop((narrowOop *)addr) != NULL; 3140 } else { 3141 return oopDesc::load_decode_heap_oop((oop*)addr) != NULL; 3142 } 3143} 3144 3145int java_lang_Class::_klass_offset; 3146int java_lang_Class::_array_klass_offset; 3147int java_lang_Class::_oop_size_offset; 3148int java_lang_Class::_static_oop_field_count_offset; 3149int java_lang_Class::_class_loader_offset; 3150int java_lang_Class::_protection_domain_offset; 3151int java_lang_Class::_component_mirror_offset; 3152int java_lang_Class::_init_lock_offset; 3153int java_lang_Class::_signers_offset; 3154GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL; 3155int java_lang_Throwable::backtrace_offset; 3156int java_lang_Throwable::detailMessage_offset; 3157int java_lang_Throwable::cause_offset; 3158int java_lang_Throwable::stackTrace_offset; 3159int java_lang_Throwable::static_unassigned_stacktrace_offset; 3160int java_lang_reflect_AccessibleObject::override_offset; 3161int java_lang_reflect_Method::clazz_offset; 3162int java_lang_reflect_Method::name_offset; 3163int java_lang_reflect_Method::returnType_offset; 3164int java_lang_reflect_Method::parameterTypes_offset; 3165int java_lang_reflect_Method::exceptionTypes_offset; 3166int java_lang_reflect_Method::slot_offset; 3167int java_lang_reflect_Method::modifiers_offset; 3168int java_lang_reflect_Method::signature_offset; 3169int java_lang_reflect_Method::annotations_offset; 3170int java_lang_reflect_Method::parameter_annotations_offset; 3171int java_lang_reflect_Method::annotation_default_offset; 3172int java_lang_reflect_Method::type_annotations_offset; 3173int java_lang_reflect_Constructor::clazz_offset; 3174int java_lang_reflect_Constructor::parameterTypes_offset; 3175int java_lang_reflect_Constructor::exceptionTypes_offset; 3176int java_lang_reflect_Constructor::slot_offset; 3177int java_lang_reflect_Constructor::modifiers_offset; 3178int java_lang_reflect_Constructor::signature_offset; 3179int java_lang_reflect_Constructor::annotations_offset; 3180int java_lang_reflect_Constructor::parameter_annotations_offset; 3181int java_lang_reflect_Constructor::type_annotations_offset; 3182int java_lang_reflect_Field::clazz_offset; 3183int java_lang_reflect_Field::name_offset; 3184int java_lang_reflect_Field::type_offset; 3185int java_lang_reflect_Field::slot_offset; 3186int java_lang_reflect_Field::modifiers_offset; 3187int java_lang_reflect_Field::signature_offset; 3188int java_lang_reflect_Field::annotations_offset; 3189int java_lang_reflect_Field::type_annotations_offset; 3190int java_lang_reflect_Parameter::name_offset; 3191int java_lang_reflect_Parameter::modifiers_offset; 3192int java_lang_reflect_Parameter::index_offset; 3193int java_lang_reflect_Parameter::executable_offset; 3194int java_lang_boxing_object::value_offset; 3195int java_lang_boxing_object::long_value_offset; 3196int java_lang_ref_Reference::referent_offset; 3197int java_lang_ref_Reference::queue_offset; 3198int java_lang_ref_Reference::next_offset; 3199int java_lang_ref_Reference::discovered_offset; 3200int java_lang_ref_Reference::static_lock_offset; 3201int java_lang_ref_Reference::static_pending_offset; 3202int java_lang_ref_Reference::number_of_fake_oop_fields; 3203int java_lang_ref_SoftReference::timestamp_offset; 3204int java_lang_ref_SoftReference::static_clock_offset; 3205int java_lang_ClassLoader::parent_offset; 3206int java_lang_System::static_in_offset; 3207int java_lang_System::static_out_offset; 3208int java_lang_System::static_err_offset; 3209int java_lang_System::static_security_offset; 3210int java_lang_StackTraceElement::declaringClass_offset; 3211int java_lang_StackTraceElement::methodName_offset; 3212int java_lang_StackTraceElement::fileName_offset; 3213int java_lang_StackTraceElement::lineNumber_offset; 3214int java_lang_AssertionStatusDirectives::classes_offset; 3215int java_lang_AssertionStatusDirectives::classEnabled_offset; 3216int java_lang_AssertionStatusDirectives::packages_offset; 3217int java_lang_AssertionStatusDirectives::packageEnabled_offset; 3218int java_lang_AssertionStatusDirectives::deflt_offset; 3219int java_nio_Buffer::_limit_offset; 3220int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0; 3221int sun_reflect_ConstantPool::_oop_offset; 3222int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset; 3223 3224 3225// Support for java_lang_StackTraceElement 3226 3227void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 3228 element->obj_field_put(fileName_offset, value); 3229} 3230 3231void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 3232 element->obj_field_put(declaringClass_offset, value); 3233} 3234 3235void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 3236 element->obj_field_put(methodName_offset, value); 3237} 3238 3239void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 3240 element->int_field_put(lineNumber_offset, value); 3241} 3242 3243 3244// Support for java Assertions - java_lang_AssertionStatusDirectives. 3245 3246void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 3247 o->obj_field_put(classes_offset, val); 3248} 3249 3250void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 3251 o->obj_field_put(classEnabled_offset, val); 3252} 3253 3254void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 3255 o->obj_field_put(packages_offset, val); 3256} 3257 3258void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 3259 o->obj_field_put(packageEnabled_offset, val); 3260} 3261 3262void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 3263 o->bool_field_put(deflt_offset, val); 3264} 3265 3266 3267// Support for intrinsification of java.nio.Buffer.checkIndex 3268int java_nio_Buffer::limit_offset() { 3269 return _limit_offset; 3270} 3271 3272 3273void java_nio_Buffer::compute_offsets() { 3274 Klass* k = SystemDictionary::nio_Buffer_klass(); 3275 assert(k != NULL, "must be loaded in 1.4+"); 3276 compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature()); 3277} 3278 3279void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) { 3280 if (_owner_offset != 0) return; 3281 3282 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK); 3283 Klass* k = SystemDictionary::abstract_ownable_synchronizer_klass(); 3284 compute_offset(_owner_offset, k, 3285 vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature()); 3286} 3287 3288oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 3289 assert(_owner_offset != 0, "Must be initialized"); 3290 return obj->obj_field(_owner_offset); 3291} 3292 3293// Compute hard-coded offsets 3294// Invoked before SystemDictionary::initialize, so pre-loaded classes 3295// are not available to determine the offset_of_static_fields. 3296void JavaClasses::compute_hard_coded_offsets() { 3297 const int x = heapOopSize; 3298 const int header = instanceOopDesc::base_offset_in_bytes(); 3299 3300 // Throwable Class 3301 java_lang_Throwable::backtrace_offset = java_lang_Throwable::hc_backtrace_offset * x + header; 3302 java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header; 3303 java_lang_Throwable::cause_offset = java_lang_Throwable::hc_cause_offset * x + header; 3304 java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header; 3305 java_lang_Throwable::static_unassigned_stacktrace_offset = java_lang_Throwable::hc_static_unassigned_stacktrace_offset * x; 3306 3307 // java_lang_boxing_object 3308 java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header; 3309 java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong); 3310 3311 // java_lang_ref_Reference: 3312 java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header; 3313 java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header; 3314 java_lang_ref_Reference::next_offset = java_lang_ref_Reference::hc_next_offset * x + header; 3315 java_lang_ref_Reference::discovered_offset = java_lang_ref_Reference::hc_discovered_offset * x + header; 3316 java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset * x; 3317 java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x; 3318 // Artificial fields for java_lang_ref_Reference 3319 // The first field is for the discovered field added in 1.4 3320 java_lang_ref_Reference::number_of_fake_oop_fields = 1; 3321 3322 // java_lang_ref_SoftReference Class 3323 java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong); 3324 // Don't multiply static fields because they are always in wordSize units 3325 java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x; 3326 3327 // java_lang_ClassLoader 3328 java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header; 3329 3330 // java_lang_System 3331 java_lang_System::static_in_offset = java_lang_System::hc_static_in_offset * x; 3332 java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x; 3333 java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x; 3334 java_lang_System::static_security_offset = java_lang_System::hc_static_security_offset * x; 3335 3336 // java_lang_StackTraceElement 3337 java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset * x + header; 3338 java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header; 3339 java_lang_StackTraceElement::fileName_offset = java_lang_StackTraceElement::hc_fileName_offset * x + header; 3340 java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header; 3341 java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header; 3342 java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header; 3343 java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header; 3344 java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header; 3345 java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header; 3346 3347} 3348 3349 3350// Compute non-hard-coded field offsets of all the classes in this file 3351void JavaClasses::compute_offsets() { 3352 // java_lang_Class::compute_offsets was called earlier in bootstrap 3353 java_lang_ClassLoader::compute_offsets(); 3354 java_lang_Thread::compute_offsets(); 3355 java_lang_ThreadGroup::compute_offsets(); 3356 java_lang_invoke_MethodHandle::compute_offsets(); 3357 java_lang_invoke_DirectMethodHandle::compute_offsets(); 3358 java_lang_invoke_MemberName::compute_offsets(); 3359 java_lang_invoke_LambdaForm::compute_offsets(); 3360 java_lang_invoke_MethodType::compute_offsets(); 3361 java_lang_invoke_CallSite::compute_offsets(); 3362 java_security_AccessControlContext::compute_offsets(); 3363 // Initialize reflection classes. The layouts of these classes 3364 // changed with the new reflection implementation in JDK 1.4, and 3365 // since the Universe doesn't know what JDK version it is until this 3366 // point we defer computation of these offsets until now. 3367 java_lang_reflect_AccessibleObject::compute_offsets(); 3368 java_lang_reflect_Method::compute_offsets(); 3369 java_lang_reflect_Constructor::compute_offsets(); 3370 java_lang_reflect_Field::compute_offsets(); 3371 java_nio_Buffer::compute_offsets(); 3372 sun_reflect_ConstantPool::compute_offsets(); 3373 sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets(); 3374 java_lang_reflect_Parameter::compute_offsets(); 3375 3376 // generated interpreter code wants to know about the offsets we just computed: 3377 AbstractAssembler::update_delayed_values(); 3378} 3379 3380#ifndef PRODUCT 3381 3382// These functions exist to assert the validity of hard-coded field offsets to guard 3383// against changes in the class files 3384 3385bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 3386 EXCEPTION_MARK; 3387 fieldDescriptor fd; 3388 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3389 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3390 instanceKlassHandle h_klass (THREAD, k); 3391 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3392 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3393 if (!h_klass->find_local_field(f_name, f_sig, &fd)) { 3394 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 3395 return false; 3396 } 3397 if (fd.is_static()) { 3398 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 3399 return false; 3400 } 3401 if (fd.offset() == hardcoded_offset ) { 3402 return true; 3403 } else { 3404 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.", 3405 klass_name, field_name, hardcoded_offset, fd.offset()); 3406 return false; 3407 } 3408} 3409 3410 3411bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 3412 EXCEPTION_MARK; 3413 fieldDescriptor fd; 3414 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3415 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3416 instanceKlassHandle h_klass (THREAD, k); 3417 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3418 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3419 if (!h_klass->find_local_field(f_name, f_sig, &fd)) { 3420 tty->print_cr("Static field %s.%s not found", klass_name, field_name); 3421 return false; 3422 } 3423 if (!fd.is_static()) { 3424 tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name); 3425 return false; 3426 } 3427 if (fd.offset() == hardcoded_offset + InstanceMirrorKlass::offset_of_static_fields()) { 3428 return true; 3429 } else { 3430 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()); 3431 return false; 3432 } 3433} 3434 3435 3436bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) { 3437 EXCEPTION_MARK; 3438 fieldDescriptor fd; 3439 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 3440 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 3441 instanceKlassHandle h_klass (THREAD, k); 3442 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 3443 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 3444 if (!h_klass->find_local_field(f_name, f_sig, &fd)) { 3445 tty->print_cr("Static field %s.%s not found", klass_name, field_name); 3446 return false; 3447 } 3448 if (!fd.is_static() || !fd.has_initial_value()) { 3449 tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name); 3450 return false; 3451 } 3452 if (!fd.initial_value_tag().is_int()) { 3453 tty->print_cr("Static field %s.%s is not an int", klass_name, field_name); 3454 return false; 3455 } 3456 jint field_value = fd.int_initial_value(); 3457 if (field_value == hardcoded_constant) { 3458 return true; 3459 } else { 3460 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); 3461 return false; 3462 } 3463} 3464 3465 3466// Check the hard-coded field offsets of all the classes in this file 3467 3468void JavaClasses::check_offsets() { 3469 bool valid = true; 3470 HandleMark hm; 3471 3472#define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3473 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig) 3474 3475#define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3476 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig) 3477 3478#define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 3479 valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig) 3480 3481#define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \ 3482 valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig) 3483 3484 // java.lang.String 3485 3486 CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C"); 3487 if (java_lang_String::has_offset_field()) { 3488 CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I"); 3489 CHECK_OFFSET("java/lang/String", java_lang_String, count, "I"); 3490 } 3491 if (java_lang_String::has_hash_field()) { 3492 CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I"); 3493 } 3494 3495 // java.lang.Class 3496 3497 // Fake fields 3498 // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked 3499 // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked 3500 3501 // java.lang.Throwable 3502 3503 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;"); 3504 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;"); 3505 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;"); 3506 CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;"); 3507 3508 // Boxed primitive objects (java_lang_boxing_object) 3509 3510 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 3511 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 3512 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 3513 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 3514 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 3515 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 3516 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 3517 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 3518 3519 // java.lang.ClassLoader 3520 3521 CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent, "Ljava/lang/ClassLoader;"); 3522 3523 // java.lang.System 3524 3525 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, in, "Ljava/io/InputStream;"); 3526 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;"); 3527 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;"); 3528 CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, security, "Ljava/lang/SecurityManager;"); 3529 3530 // java.lang.StackTraceElement 3531 3532 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;"); 3533 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;"); 3534 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, fileName, "Ljava/lang/String;"); 3535 CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I"); 3536 3537 // java.lang.ref.Reference 3538 3539 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;"); 3540 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;"); 3541 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;"); 3542 // Fake field 3543 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;"); 3544 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;"); 3545 CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;"); 3546 3547 // java.lang.ref.SoftReference 3548 3549 CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J"); 3550 CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J"); 3551 3552 // java.lang.AssertionStatusDirectives 3553 // 3554 // The CheckAssertionStatusDirectives boolean can be removed from here and 3555 // globals.hpp after the AssertionStatusDirectives class has been integrated 3556 // into merlin "for some time." Without it, the vm will fail with early 3557 // merlin builds. 3558 3559 if (CheckAssertionStatusDirectives) { 3560 const char* nm = "java/lang/AssertionStatusDirectives"; 3561 const char* sig = "[Ljava/lang/String;"; 3562 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig); 3563 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z"); 3564 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig); 3565 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z"); 3566 CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z"); 3567 } 3568 3569 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed"); 3570} 3571 3572#endif // PRODUCT 3573 3574int InjectedField::compute_offset() { 3575 Klass* klass_oop = klass(); 3576 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) { 3577 if (!may_be_java && !fs.access_flags().is_internal()) { 3578 // Only look at injected fields 3579 continue; 3580 } 3581 if (fs.name() == name() && fs.signature() == signature()) { 3582 return fs.offset(); 3583 } 3584 } 3585 ResourceMark rm; 3586 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)" : ""); 3587#ifndef PRODUCT 3588 klass_oop->print(); 3589 tty->print_cr("all fields:"); 3590 for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) { 3591 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 3592 } 3593#endif //PRODUCT 3594 fatal("Invalid layout of preloaded class"); 3595 return -1; 3596} 3597 3598void javaClasses_init() { 3599 JavaClasses::compute_offsets(); 3600 JavaClasses::check_offsets(); 3601 FilteredFieldsMap::initialize(); // must be done after computing offsets. 3602} 3603