1 /* 2 * Copyright (c) 1997, 2018, 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/classLoaderData.inline.hpp" 28 #include "classfile/javaClasses.inline.hpp" 29 #include "classfile/moduleEntry.hpp" 30 #include "classfile/stringTable.hpp" 31 #include "classfile/vmSymbols.hpp" 32 #include "code/debugInfo.hpp" 33 #include "code/dependencyContext.hpp" 34 #include "code/pcDesc.hpp" 35 #include "interpreter/interpreter.hpp" 36 #include "logging/log.hpp" 37 #include "logging/logStream.hpp" 38 #include "memory/oopFactory.hpp" 39 #include "memory/metaspaceShared.hpp" 40 #include "memory/resourceArea.hpp" 41 #include "memory/universe.hpp" 42 #include "oops/fieldStreams.hpp" 43 #include "oops/instanceKlass.hpp" 44 #include "oops/instanceMirrorKlass.hpp" 45 #include "oops/klass.hpp" 46 #include "oops/method.inline.hpp" 47 #include "oops/objArrayOop.inline.hpp" 48 #include "oops/oop.inline.hpp" 49 #include "oops/symbol.hpp" 50 #include "oops/typeArrayOop.inline.hpp" 51 #include "prims/resolvedMethodTable.hpp" 52 #include "runtime/fieldDescriptor.hpp" 53 #include "runtime/handles.inline.hpp" 54 #include "runtime/interfaceSupport.inline.hpp" 55 #include "runtime/java.hpp" 56 #include "runtime/javaCalls.hpp" 57 #include "runtime/jniHandles.inline.hpp" 58 #include "runtime/safepoint.hpp" 59 #include "runtime/thread.inline.hpp" 60 #include "runtime/vframe.hpp" 61 #include "utilities/align.hpp" 62 #include "utilities/preserveException.hpp" 63 64 #if INCLUDE_JVMCI 65 #include "jvmci/jvmciJavaClasses.hpp" 66 #endif 67 68 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java) \ 69 klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum); 70 71 #if INCLUDE_CDS 72 #define INJECTED_FIELD_SERIALIZE_OFFSET(klass, name, signature, may_be_java) \ 73 f->do_u4((u4*)&_##name##_offset); 74 #endif 75 76 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \ 77 { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java }, 78 79 InjectedField JavaClasses::_injected_fields[] = { 80 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD) 81 }; 82 83 int JavaClasses::compute_injected_offset(InjectedFieldID id) { 84 return _injected_fields[id].compute_offset(); 85 } 86 87 88 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) { 89 *field_count = 0; 90 91 vmSymbols::SID sid = vmSymbols::find_sid(class_name); 92 if (sid == vmSymbols::NO_SID) { 93 // Only well known classes can inject fields 94 return NULL; 95 } 96 97 int count = 0; 98 int start = -1; 99 100 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \ 101 if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) { \ 102 count++; \ 103 if (start == -1) start = klass##_##name##_enum; \ 104 } 105 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD); 106 #undef LOOKUP_INJECTED_FIELD 107 108 if (start != -1) { 109 *field_count = count; 110 return _injected_fields + start; 111 } 112 return NULL; 113 } 114 115 116 // Helpful routine for computing field offsets at run time rather than hardcoding them 117 // Finds local fields only, including static fields. Static field offsets are from the 118 // beginning of the mirror. 119 static void compute_offset(int &dest_offset, 120 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol, 121 bool is_static = false) { 122 fieldDescriptor fd; 123 if (ik == NULL) { 124 ResourceMark rm; 125 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string()); 126 vm_exit_during_initialization("Invalid layout of preloaded class"); 127 } 128 129 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) { 130 ResourceMark rm; 131 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(), 132 name_symbol->as_C_string(), signature_symbol->as_C_string()); 133 #ifndef PRODUCT 134 // Prints all fields and offsets 135 Log(class) lt; 136 LogStream ls(lt.error()); 137 ik->print_on(&ls); 138 #endif //PRODUCT 139 vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class"); 140 } 141 dest_offset = fd.offset(); 142 } 143 144 // Overloading to pass name as a string. 145 static void compute_offset(int& dest_offset, InstanceKlass* ik, 146 const char* name_string, Symbol* signature_symbol, 147 bool is_static = false) { 148 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string)); 149 if (name == NULL) { 150 ResourceMark rm; 151 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string); 152 vm_exit_during_initialization("Invalid layout of preloaded class", ik->external_name()); 153 } 154 compute_offset(dest_offset, ik, name, signature_symbol, is_static); 155 } 156 157 // Same as above but for "optional" offsets that might not be present in certain JDK versions 158 // Old versions should be cleaned out since Hotspot only supports the current JDK, and this 159 // function should be removed. 160 static void 161 compute_optional_offset(int& dest_offset, 162 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol) { 163 fieldDescriptor fd; 164 if (ik->find_local_field(name_symbol, signature_symbol, &fd)) { 165 dest_offset = fd.offset(); 166 } 167 } 168 169 int java_lang_String::value_offset = 0; 170 int java_lang_String::hash_offset = 0; 171 int java_lang_String::coder_offset = 0; 172 173 bool java_lang_String::initialized = false; 174 175 bool java_lang_String::is_instance(oop obj) { 176 return is_instance_inlined(obj); 177 } 178 179 #if INCLUDE_CDS 180 #define FIELD_SERIALIZE_OFFSET(offset, klass, name, signature, is_static) \ 181 f->do_u4((u4*)&offset) 182 183 #define FIELD_SERIALIZE_OFFSET_OPTIONAL(offset, klass, name, signature) \ 184 f->do_u4((u4*)&offset) 185 #endif 186 187 #define FIELD_COMPUTE_OFFSET(offset, klass, name, signature, is_static) \ 188 compute_offset(offset, klass, name, vmSymbols::signature(), is_static) 189 190 #define FIELD_COMPUTE_OFFSET_OPTIONAL(offset, klass, name, signature) \ 191 compute_optional_offset(offset, klass, name, vmSymbols::signature()) 192 193 #define STRING_FIELDS_DO(macro) \ 194 macro(value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \ 195 macro(hash_offset, k, "hash", int_signature, false); \ 196 macro(coder_offset, k, "coder", byte_signature, false) 197 198 void java_lang_String::compute_offsets() { 199 if (initialized) { 200 return; 201 } 202 203 InstanceKlass* k = SystemDictionary::String_klass(); 204 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET); 205 206 initialized = true; 207 } 208 209 #if INCLUDE_CDS 210 void java_lang_String::serialize(SerializeClosure* f) { 211 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 212 f->do_u4((u4*)&initialized); 213 } 214 #endif 215 216 class CompactStringsFixup : public FieldClosure { 217 private: 218 bool _value; 219 220 public: 221 CompactStringsFixup(bool value) : _value(value) {} 222 223 void do_field(fieldDescriptor* fd) { 224 if (fd->name() == vmSymbols::compact_strings_name()) { 225 oop mirror = fd->field_holder()->java_mirror(); 226 assert(fd->field_holder() == SystemDictionary::String_klass(), "Should be String"); 227 assert(mirror != NULL, "String must have mirror already"); 228 mirror->bool_field_put(fd->offset(), _value); 229 } 230 } 231 }; 232 233 void java_lang_String::set_compact_strings(bool value) { 234 CompactStringsFixup fix(value); 235 InstanceKlass::cast(SystemDictionary::String_klass())->do_local_static_fields(&fix); 236 } 237 238 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) { 239 assert(initialized, "Must be initialized"); 240 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings"); 241 242 // Create the String object first, so there's a chance that the String 243 // and the char array it points to end up in the same cache line. 244 oop obj; 245 obj = SystemDictionary::String_klass()->allocate_instance(CHECK_NH); 246 247 // Create the char array. The String object must be handlized here 248 // because GC can happen as a result of the allocation attempt. 249 Handle h_obj(THREAD, obj); 250 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16. 251 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);; 252 253 // Point the String at the char array 254 obj = h_obj(); 255 set_value(obj, buffer); 256 // No need to zero the offset, allocation zero'ed the entire String object 257 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16); 258 return h_obj; 259 } 260 261 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) { 262 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length); 263 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 264 typeArrayOop buffer = value(h_obj()); 265 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]"); 266 if (is_latin1) { 267 for (int index = 0; index < length; index++) { 268 buffer->byte_at_put(index, (jbyte)unicode[index]); 269 } 270 } else { 271 for (int index = 0; index < length; index++) { 272 buffer->char_at_put(index, unicode[index]); 273 } 274 } 275 276 #ifdef ASSERT 277 { 278 ResourceMark rm; 279 char* expected = UNICODE::as_utf8(unicode, length); 280 char* actual = as_utf8_string(h_obj()); 281 if (strcmp(expected, actual) != 0) { 282 tty->print_cr("Unicode conversion failure: %s --> %s", expected, actual); 283 ShouldNotReachHere(); 284 } 285 } 286 #endif 287 288 return h_obj; 289 } 290 291 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) { 292 Handle h_obj = create_from_unicode(unicode, length, CHECK_0); 293 return h_obj(); 294 } 295 296 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) { 297 if (utf8_str == NULL) { 298 return Handle(); 299 } 300 bool has_multibyte, is_latin1; 301 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte); 302 if (!CompactStrings) { 303 has_multibyte = true; 304 is_latin1 = false; 305 } 306 307 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 308 if (length > 0) { 309 if (!has_multibyte) { 310 strncpy((char*)value(h_obj())->byte_at_addr(0), utf8_str, length); 311 } else if (is_latin1) { 312 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 313 } else { 314 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 315 } 316 } 317 318 #ifdef ASSERT 319 // This check is too strict because the input string is not necessarily valid UTF8. 320 // For example, it may be created with arbitrary content via jni_NewStringUTF. 321 /* 322 { 323 ResourceMark rm; 324 const char* expected = utf8_str; 325 char* actual = as_utf8_string(h_obj()); 326 if (strcmp(expected, actual) != 0) { 327 tty->print_cr("String conversion failure: %s --> %s", expected, actual); 328 ShouldNotReachHere(); 329 } 330 } 331 */ 332 #endif 333 334 return h_obj; 335 } 336 337 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) { 338 Handle h_obj = create_from_str(utf8_str, CHECK_0); 339 return h_obj(); 340 } 341 342 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) { 343 const char* utf8_str = (char*)symbol->bytes(); 344 int utf8_len = symbol->utf8_length(); 345 346 bool has_multibyte, is_latin1; 347 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte); 348 if (!CompactStrings) { 349 has_multibyte = true; 350 is_latin1 = false; 351 } 352 353 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 354 if (length > 0) { 355 if (!has_multibyte) { 356 strncpy((char*)value(h_obj())->byte_at_addr(0), utf8_str, length); 357 } else if (is_latin1) { 358 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 359 } else { 360 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 361 } 362 } 363 364 #ifdef ASSERT 365 { 366 ResourceMark rm; 367 const char* expected = symbol->as_utf8(); 368 char* actual = as_utf8_string(h_obj()); 369 if (strncmp(expected, actual, utf8_len) != 0) { 370 tty->print_cr("Symbol conversion failure: %s --> %s", expected, actual); 371 ShouldNotReachHere(); 372 } 373 } 374 #endif 375 376 return h_obj; 377 } 378 379 // Converts a C string to a Java String based on current encoding 380 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) { 381 assert(str != NULL, "bad arguments"); 382 383 typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *); 384 static to_java_string_fn_t _to_java_string_fn = NULL; 385 386 if (_to_java_string_fn == NULL) { 387 void *lib_handle = os::native_java_library(); 388 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform")); 389 if (_to_java_string_fn == NULL) { 390 fatal("NewStringPlatform missing"); 391 } 392 } 393 394 jstring js = NULL; 395 { JavaThread* thread = (JavaThread*)THREAD; 396 assert(thread->is_Java_thread(), "must be java thread"); 397 HandleMark hm(thread); 398 ThreadToNativeFromVM ttn(thread); 399 js = (_to_java_string_fn)(thread->jni_environment(), str); 400 } 401 return Handle(THREAD, JNIHandles::resolve(js)); 402 } 403 404 // Converts a Java String to a native C string that can be used for 405 // native OS calls. 406 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) { 407 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*); 408 static to_platform_string_fn_t _to_platform_string_fn = NULL; 409 410 if (_to_platform_string_fn == NULL) { 411 void *lib_handle = os::native_java_library(); 412 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars")); 413 if (_to_platform_string_fn == NULL) { 414 fatal("GetStringPlatformChars missing"); 415 } 416 } 417 418 char *native_platform_string; 419 { JavaThread* thread = (JavaThread*)THREAD; 420 assert(thread->is_Java_thread(), "must be java thread"); 421 JNIEnv *env = thread->jni_environment(); 422 jstring js = (jstring) JNIHandles::make_local(env, java_string()); 423 bool is_copy; 424 HandleMark hm(thread); 425 ThreadToNativeFromVM ttn(thread); 426 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy); 427 assert(is_copy == JNI_TRUE, "is_copy value changed"); 428 JNIHandles::destroy_local(js); 429 } 430 return native_platform_string; 431 } 432 433 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) { 434 oop obj = java_string(); 435 // Typical usage is to convert all '/' to '.' in string. 436 typeArrayOop value = java_lang_String::value(obj); 437 int length = java_lang_String::length(obj); 438 bool is_latin1 = java_lang_String::is_latin1(obj); 439 440 // First check if any from_char exist 441 int index; // Declared outside, used later 442 for (index = 0; index < length; index++) { 443 jchar c = !is_latin1 ? value->char_at(index) : 444 ((jchar) value->byte_at(index)) & 0xff; 445 if (c == from_char) { 446 break; 447 } 448 } 449 if (index == length) { 450 // No from_char, so do not copy. 451 return java_string; 452 } 453 454 // Check if result string will be latin1 455 bool to_is_latin1 = false; 456 457 // Replacement char must be latin1 458 if (CompactStrings && UNICODE::is_latin1(to_char)) { 459 if (is_latin1) { 460 // Source string is latin1 as well 461 to_is_latin1 = true; 462 } else if (!UNICODE::is_latin1(from_char)) { 463 // We are replacing an UTF16 char. Scan string to 464 // check if result can be latin1 encoded. 465 to_is_latin1 = true; 466 for (index = 0; index < length; index++) { 467 jchar c = value->char_at(index); 468 if (c != from_char && !UNICODE::is_latin1(c)) { 469 to_is_latin1 = false; 470 break; 471 } 472 } 473 } 474 } 475 476 // Create new UNICODE (or byte) buffer. Must handlize value because GC 477 // may happen during String and char array creation. 478 typeArrayHandle h_value(THREAD, value); 479 Handle string = basic_create(length, to_is_latin1, CHECK_NH); 480 typeArrayOop from_buffer = h_value(); 481 typeArrayOop to_buffer = java_lang_String::value(string()); 482 483 // Copy contents 484 for (index = 0; index < length; index++) { 485 jchar c = (!is_latin1) ? from_buffer->char_at(index) : 486 ((jchar) from_buffer->byte_at(index)) & 0xff; 487 if (c == from_char) { 488 c = to_char; 489 } 490 if (!to_is_latin1) { 491 to_buffer->char_at_put(index, c); 492 } else { 493 to_buffer->byte_at_put(index, (jbyte) c); 494 } 495 } 496 return string; 497 } 498 499 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) { 500 typeArrayOop value = java_lang_String::value(java_string); 501 length = java_lang_String::length(java_string); 502 bool is_latin1 = java_lang_String::is_latin1(java_string); 503 504 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length); 505 if (result != NULL) { 506 if (!is_latin1) { 507 for (int index = 0; index < length; index++) { 508 result[index] = value->char_at(index); 509 } 510 } else { 511 for (int index = 0; index < length; index++) { 512 result[index] = ((jchar) value->byte_at(index)) & 0xff; 513 } 514 } 515 } else { 516 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string"); 517 } 518 return result; 519 } 520 521 unsigned int java_lang_String::hash_code(oop java_string) { 522 int length = java_lang_String::length(java_string); 523 // Zero length string will hash to zero with String.hashCode() function. 524 if (length == 0) return 0; 525 526 typeArrayOop value = java_lang_String::value(java_string); 527 bool is_latin1 = java_lang_String::is_latin1(java_string); 528 529 if (is_latin1) { 530 return java_lang_String::hash_code(value->byte_at_addr(0), length); 531 } else { 532 return java_lang_String::hash_code(value->char_at_addr(0), length); 533 } 534 } 535 536 char* java_lang_String::as_quoted_ascii(oop java_string) { 537 typeArrayOop value = java_lang_String::value(java_string); 538 int length = java_lang_String::length(java_string); 539 bool is_latin1 = java_lang_String::is_latin1(java_string); 540 541 if (length == 0) return NULL; 542 543 char* result; 544 int result_length; 545 if (!is_latin1) { 546 jchar* base = value->char_at_addr(0); 547 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 548 result = NEW_RESOURCE_ARRAY(char, result_length); 549 UNICODE::as_quoted_ascii(base, length, result, result_length); 550 } else { 551 jbyte* base = value->byte_at_addr(0); 552 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 553 result = NEW_RESOURCE_ARRAY(char, result_length); 554 UNICODE::as_quoted_ascii(base, length, result, result_length); 555 } 556 assert(result_length >= length + 1, "must not be shorter"); 557 assert(result_length == (int)strlen(result) + 1, "must match"); 558 return result; 559 } 560 561 Symbol* java_lang_String::as_symbol(oop java_string, TRAPS) { 562 typeArrayOop value = java_lang_String::value(java_string); 563 int length = java_lang_String::length(java_string); 564 bool is_latin1 = java_lang_String::is_latin1(java_string); 565 if (!is_latin1) { 566 jchar* base = (length == 0) ? NULL : value->char_at_addr(0); 567 Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD); 568 return sym; 569 } else { 570 ResourceMark rm; 571 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 572 const char* base = UNICODE::as_utf8(position, length); 573 Symbol* sym = SymbolTable::lookup(base, length, THREAD); 574 return sym; 575 } 576 } 577 578 Symbol* java_lang_String::as_symbol_or_null(oop java_string) { 579 typeArrayOop value = java_lang_String::value(java_string); 580 int length = java_lang_String::length(java_string); 581 bool is_latin1 = java_lang_String::is_latin1(java_string); 582 if (!is_latin1) { 583 jchar* base = (length == 0) ? NULL : value->char_at_addr(0); 584 return SymbolTable::probe_unicode(base, length); 585 } else { 586 ResourceMark rm; 587 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 588 const char* base = UNICODE::as_utf8(position, length); 589 return SymbolTable::probe(base, length); 590 } 591 } 592 593 int java_lang_String::utf8_length(oop java_string) { 594 typeArrayOop value = java_lang_String::value(java_string); 595 int length = java_lang_String::length(java_string); 596 bool is_latin1 = java_lang_String::is_latin1(java_string); 597 if (length == 0) { 598 return 0; 599 } 600 if (!is_latin1) { 601 return UNICODE::utf8_length(value->char_at_addr(0), length); 602 } else { 603 return UNICODE::utf8_length(value->byte_at_addr(0), length); 604 } 605 } 606 607 char* java_lang_String::as_utf8_string(oop java_string) { 608 typeArrayOop value = java_lang_String::value(java_string); 609 int length = java_lang_String::length(java_string); 610 bool is_latin1 = java_lang_String::is_latin1(java_string); 611 if (!is_latin1) { 612 jchar* position = (length == 0) ? NULL : value->char_at_addr(0); 613 return UNICODE::as_utf8(position, length); 614 } else { 615 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 616 return UNICODE::as_utf8(position, length); 617 } 618 } 619 620 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) { 621 typeArrayOop value = java_lang_String::value(java_string); 622 int length = java_lang_String::length(java_string); 623 bool is_latin1 = java_lang_String::is_latin1(java_string); 624 if (!is_latin1) { 625 jchar* position = (length == 0) ? NULL : value->char_at_addr(0); 626 return UNICODE::as_utf8(position, length, buf, buflen); 627 } else { 628 jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0); 629 return UNICODE::as_utf8(position, length, buf, buflen); 630 } 631 } 632 633 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) { 634 typeArrayOop value = java_lang_String::value(java_string); 635 int length = java_lang_String::length(java_string); 636 assert(start + len <= length, "just checking"); 637 bool is_latin1 = java_lang_String::is_latin1(java_string); 638 if (!is_latin1) { 639 jchar* position = value->char_at_addr(start); 640 return UNICODE::as_utf8(position, len); 641 } else { 642 jbyte* position = value->byte_at_addr(start); 643 return UNICODE::as_utf8(position, len); 644 } 645 } 646 647 char* java_lang_String::as_utf8_string(oop java_string, int start, int len, char* buf, int buflen) { 648 typeArrayOop value = java_lang_String::value(java_string); 649 int length = java_lang_String::length(java_string); 650 assert(start + len <= length, "just checking"); 651 bool is_latin1 = java_lang_String::is_latin1(java_string); 652 if (!is_latin1) { 653 jchar* position = value->char_at_addr(start); 654 return UNICODE::as_utf8(position, len, buf, buflen); 655 } else { 656 jbyte* position = value->byte_at_addr(start); 657 return UNICODE::as_utf8(position, len, buf, buflen); 658 } 659 } 660 661 bool java_lang_String::equals(oop java_string, jchar* chars, int len) { 662 assert(java_string->klass() == SystemDictionary::String_klass(), 663 "must be java_string"); 664 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 665 int length = java_lang_String::length(java_string); 666 if (length != len) { 667 return false; 668 } 669 bool is_latin1 = java_lang_String::is_latin1(java_string); 670 if (!is_latin1) { 671 for (int i = 0; i < len; i++) { 672 if (value->char_at(i) != chars[i]) { 673 return false; 674 } 675 } 676 } else { 677 for (int i = 0; i < len; i++) { 678 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) { 679 return false; 680 } 681 } 682 } 683 return true; 684 } 685 686 bool java_lang_String::equals(oop str1, oop str2) { 687 assert(str1->klass() == SystemDictionary::String_klass(), 688 "must be java String"); 689 assert(str2->klass() == SystemDictionary::String_klass(), 690 "must be java String"); 691 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1); 692 int length1 = java_lang_String::length(str1); 693 bool is_latin1 = java_lang_String::is_latin1(str1); 694 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2); 695 int length2 = java_lang_String::length(str2); 696 bool is_latin2 = java_lang_String::is_latin1(str2); 697 698 if ((length1 != length2) || (is_latin1 != is_latin2)) { 699 // Strings of different size or with different 700 // coders are never equal. 701 return false; 702 } 703 int blength1 = value1->length(); 704 for (int i = 0; i < blength1; i++) { 705 if (value1->byte_at(i) != value2->byte_at(i)) { 706 return false; 707 } 708 } 709 return true; 710 } 711 712 void java_lang_String::print(oop java_string, outputStream* st) { 713 assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string"); 714 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 715 716 if (value == NULL) { 717 // This can happen if, e.g., printing a String 718 // object before its initializer has been called 719 st->print("NULL"); 720 return; 721 } 722 723 int length = java_lang_String::length(java_string); 724 bool is_latin1 = java_lang_String::is_latin1(java_string); 725 726 st->print("\""); 727 for (int index = 0; index < length; index++) { 728 st->print("%c", (!is_latin1) ? value->char_at(index) : 729 ((jchar) value->byte_at(index)) & 0xff ); 730 } 731 st->print("\""); 732 } 733 734 735 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 736 assert(mirror.not_null() && fd->is_static(), "just checking"); 737 if (fd->has_initial_value()) { 738 BasicType t = fd->field_type(); 739 switch (t) { 740 case T_BYTE: 741 mirror()->byte_field_put(fd->offset(), fd->int_initial_value()); 742 break; 743 case T_BOOLEAN: 744 mirror()->bool_field_put(fd->offset(), fd->int_initial_value()); 745 break; 746 case T_CHAR: 747 mirror()->char_field_put(fd->offset(), fd->int_initial_value()); 748 break; 749 case T_SHORT: 750 mirror()->short_field_put(fd->offset(), fd->int_initial_value()); 751 break; 752 case T_INT: 753 mirror()->int_field_put(fd->offset(), fd->int_initial_value()); 754 break; 755 case T_FLOAT: 756 mirror()->float_field_put(fd->offset(), fd->float_initial_value()); 757 break; 758 case T_DOUBLE: 759 mirror()->double_field_put(fd->offset(), fd->double_initial_value()); 760 break; 761 case T_LONG: 762 mirror()->long_field_put(fd->offset(), fd->long_initial_value()); 763 break; 764 case T_OBJECT: 765 { 766 assert(fd->signature() == vmSymbols::string_signature(), 767 "just checking"); 768 if (DumpSharedSpaces && oopDesc::is_archive_object(mirror())) { 769 // Archive the String field and update the pointer. 770 oop s = mirror()->obj_field(fd->offset()); 771 oop archived_s = StringTable::create_archived_string(s, CHECK); 772 mirror()->obj_field_put(fd->offset(), archived_s); 773 } else { 774 oop string = fd->string_initial_value(CHECK); 775 mirror()->obj_field_put(fd->offset(), string); 776 } 777 } 778 break; 779 default: 780 THROW_MSG(vmSymbols::java_lang_ClassFormatError(), 781 "Illegal ConstantValue attribute in class file"); 782 } 783 } 784 } 785 786 787 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) { 788 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already"); 789 790 // If the offset was read from the shared archive, it was fixed up already 791 if (!k->is_shared()) { 792 if (k->is_instance_klass()) { 793 // During bootstrap, java.lang.Class wasn't loaded so static field 794 // offsets were computed without the size added it. Go back and 795 // update all the static field offsets to included the size. 796 for (JavaFieldStream fs(InstanceKlass::cast(k)); !fs.done(); fs.next()) { 797 if (fs.access_flags().is_static()) { 798 int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields(); 799 fs.set_offset(real_offset); 800 } 801 } 802 } 803 } 804 805 if (k->is_shared() && k->has_raw_archived_mirror()) { 806 if (MetaspaceShared::open_archive_heap_region_mapped()) { 807 oop m = k->archived_java_mirror(); 808 assert(m != NULL, "archived mirror is NULL"); 809 assert(oopDesc::is_archive_object(m), "must be archived mirror object"); 810 Handle m_h(THREAD, m); 811 // restore_archived_mirror() clears the klass' _has_raw_archived_mirror flag 812 restore_archived_mirror(k, m_h, Handle(), Handle(), Handle(), CHECK); 813 return; 814 } else { 815 k->set_java_mirror_handle(NULL); 816 k->clear_has_raw_archived_mirror(); 817 } 818 } 819 create_mirror(k, Handle(), Handle(), Handle(), CHECK); 820 } 821 822 void java_lang_Class::initialize_mirror_fields(Klass* k, 823 Handle mirror, 824 Handle protection_domain, 825 TRAPS) { 826 // Allocate a simple java object for a lock. 827 // This needs to be a java object because during class initialization 828 // it can be held across a java call. 829 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK); 830 set_init_lock(mirror(), r); 831 832 // Set protection domain also 833 set_protection_domain(mirror(), protection_domain()); 834 835 // Initialize static fields 836 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK); 837 } 838 839 // Set the java.lang.Module module field in the java_lang_Class mirror 840 void java_lang_Class::set_mirror_module_field(Klass* k, Handle mirror, Handle module, TRAPS) { 841 if (module.is_null()) { 842 // During startup, the module may be NULL only if java.base has not been defined yet. 843 // Put the class on the fixup_module_list to patch later when the java.lang.Module 844 // for java.base is known. 845 assert(!Universe::is_module_initialized(), "Incorrect java.lang.Module pre module system initialization"); 846 847 bool javabase_was_defined = false; 848 { 849 MutexLocker m1(Module_lock, THREAD); 850 // Keep list of classes needing java.base module fixup 851 if (!ModuleEntryTable::javabase_defined()) { 852 assert(k->java_mirror() != NULL, "Class's mirror is null"); 853 k->class_loader_data()->inc_keep_alive(); 854 assert(fixup_module_field_list() != NULL, "fixup_module_field_list not initialized"); 855 fixup_module_field_list()->push(k); 856 } else { 857 javabase_was_defined = true; 858 } 859 } 860 861 // If java.base was already defined then patch this particular class with java.base. 862 if (javabase_was_defined) { 863 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry(); 864 assert(javabase_entry != NULL && javabase_entry->module() != NULL, 865 "Setting class module field, " JAVA_BASE_NAME " should be defined"); 866 Handle javabase_handle(THREAD, javabase_entry->module()); 867 set_module(mirror(), javabase_handle()); 868 } 869 } else { 870 assert(Universe::is_module_initialized() || 871 (ModuleEntryTable::javabase_defined() && 872 (module() == ModuleEntryTable::javabase_moduleEntry()->module())), 873 "Incorrect java.lang.Module specification while creating mirror"); 874 set_module(mirror(), module()); 875 } 876 } 877 878 // Statically allocate fixup lists because they always get created. 879 void java_lang_Class::allocate_fixup_lists() { 880 GrowableArray<Klass*>* mirror_list = 881 new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true); 882 set_fixup_mirror_list(mirror_list); 883 884 GrowableArray<Klass*>* module_list = 885 new (ResourceObj::C_HEAP, mtModule) GrowableArray<Klass*>(500, true); 886 set_fixup_module_field_list(module_list); 887 } 888 889 void java_lang_Class::create_mirror(Klass* k, Handle class_loader, 890 Handle module, Handle protection_domain, TRAPS) { 891 assert(k != NULL, "Use create_basic_type_mirror for primitive types"); 892 assert(k->java_mirror() == NULL, "should only assign mirror once"); 893 894 // Use this moment of initialization to cache modifier_flags also, 895 // to support Class.getModifiers(). Instance classes recalculate 896 // the cached flags after the class file is parsed, but before the 897 // class is put into the system dictionary. 898 int computed_modifiers = k->compute_modifier_flags(CHECK); 899 k->set_modifier_flags(computed_modifiers); 900 // Class_klass has to be loaded because it is used to allocate 901 // the mirror. 902 if (SystemDictionary::Class_klass_loaded()) { 903 // Allocate mirror (java.lang.Class instance) 904 oop mirror_oop = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK); 905 Handle mirror(THREAD, mirror_oop); 906 Handle comp_mirror; 907 908 // Setup indirection from mirror->klass 909 java_lang_Class::set_klass(mirror(), k); 910 911 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass()); 912 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set"); 913 914 java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror())); 915 916 // It might also have a component mirror. This mirror must already exist. 917 if (k->is_array_klass()) { 918 if (k->is_typeArray_klass()) { 919 BasicType type = TypeArrayKlass::cast(k)->element_type(); 920 comp_mirror = Handle(THREAD, Universe::java_mirror(type)); 921 } else { 922 assert(k->is_objArray_klass(), "Must be"); 923 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass(); 924 assert(element_klass != NULL, "Must have an element klass"); 925 comp_mirror = Handle(THREAD, element_klass->java_mirror()); 926 } 927 assert(comp_mirror() != NULL, "must have a mirror"); 928 929 // Two-way link between the array klass and its component mirror: 930 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k 931 set_component_mirror(mirror(), comp_mirror()); 932 // See below for ordering dependencies between field array_klass in component mirror 933 // and java_mirror in this klass. 934 } else { 935 assert(k->is_instance_klass(), "Must be"); 936 937 initialize_mirror_fields(k, mirror, protection_domain, THREAD); 938 if (HAS_PENDING_EXCEPTION) { 939 // If any of the fields throws an exception like OOM remove the klass field 940 // from the mirror so GC doesn't follow it after the klass has been deallocated. 941 // This mirror looks like a primitive type, which logically it is because it 942 // it represents no class. 943 java_lang_Class::set_klass(mirror(), NULL); 944 return; 945 } 946 } 947 948 // set the classLoader field in the java_lang_Class instance 949 assert(class_loader() == k->class_loader(), "should be same"); 950 set_class_loader(mirror(), class_loader()); 951 952 // Setup indirection from klass->mirror 953 // after any exceptions can happen during allocations. 954 k->set_java_mirror(mirror); 955 956 // Set the module field in the java_lang_Class instance. This must be done 957 // after the mirror is set. 958 set_mirror_module_field(k, mirror, module, THREAD); 959 960 if (comp_mirror() != NULL) { 961 // Set after k->java_mirror() is published, because compiled code running 962 // concurrently doesn't expect a k to have a null java_mirror. 963 release_set_array_klass(comp_mirror(), k); 964 } 965 } else { 966 assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized"); 967 fixup_mirror_list()->push(k); 968 } 969 } 970 971 #if INCLUDE_CDS_JAVA_HEAP 972 // Clears mirror fields. Static final fields with initial values are reloaded 973 // from constant pool. The object identity hash is in the object header and is 974 // not affected. 975 class ResetMirrorField: public FieldClosure { 976 private: 977 Handle _m; 978 979 public: 980 ResetMirrorField(Handle mirror) : _m(mirror) {} 981 982 void do_field(fieldDescriptor* fd) { 983 assert(DumpSharedSpaces, "dump time only"); 984 assert(_m.not_null(), "Mirror cannot be NULL"); 985 986 if (fd->is_static() && fd->has_initial_value()) { 987 initialize_static_field(fd, _m, Thread::current()); 988 return; 989 } 990 991 BasicType ft = fd->field_type(); 992 switch (ft) { 993 case T_BYTE: 994 _m()->byte_field_put(fd->offset(), 0); 995 break; 996 case T_CHAR: 997 _m()->char_field_put(fd->offset(), 0); 998 break; 999 case T_DOUBLE: 1000 _m()->double_field_put(fd->offset(), 0); 1001 break; 1002 case T_FLOAT: 1003 _m()->float_field_put(fd->offset(), 0); 1004 break; 1005 case T_INT: 1006 _m()->int_field_put(fd->offset(), 0); 1007 break; 1008 case T_LONG: 1009 _m()->long_field_put(fd->offset(), 0); 1010 break; 1011 case T_SHORT: 1012 _m()->short_field_put(fd->offset(), 0); 1013 break; 1014 case T_BOOLEAN: 1015 _m()->bool_field_put(fd->offset(), false); 1016 break; 1017 case T_ARRAY: 1018 case T_OBJECT: { 1019 // It might be useful to cache the String field, but 1020 // for now just clear out any reference field 1021 oop o = _m()->obj_field(fd->offset()); 1022 _m()->obj_field_put(fd->offset(), NULL); 1023 break; 1024 } 1025 default: 1026 ShouldNotReachHere(); 1027 break; 1028 } 1029 } 1030 }; 1031 1032 void java_lang_Class::archive_basic_type_mirrors(TRAPS) { 1033 assert(MetaspaceShared::is_heap_object_archiving_allowed(), 1034 "MetaspaceShared::is_heap_object_archiving_allowed() must be true"); 1035 1036 for (int t = 0; t <= T_VOID; t++) { 1037 oop m = Universe::_mirrors[t]; 1038 if (m != NULL) { 1039 // Update the field at _array_klass_offset to point to the relocated array klass. 1040 oop archived_m = MetaspaceShared::archive_heap_object(m, THREAD); 1041 Klass *ak = (Klass*)(archived_m->metadata_field(_array_klass_offset)); 1042 assert(ak != NULL || t == T_VOID, "should not be NULL"); 1043 if (ak != NULL) { 1044 Klass *reloc_ak = MetaspaceShared::get_relocated_klass(ak); 1045 archived_m->metadata_field_put(_array_klass_offset, reloc_ak); 1046 } 1047 1048 // Clear the fields. Just to be safe 1049 Klass *k = m->klass(); 1050 Handle archived_mirror_h(THREAD, archived_m); 1051 ResetMirrorField reset(archived_mirror_h); 1052 InstanceKlass::cast(k)->do_nonstatic_fields(&reset); 1053 1054 log_trace(cds, mirror)("Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT, 1055 type2name((BasicType)t), p2i(Universe::_mirrors[t]), p2i(archived_m)); 1056 1057 Universe::_mirrors[t] = archived_m; 1058 } 1059 } 1060 1061 assert(Universe::_mirrors[T_INT] != NULL && 1062 Universe::_mirrors[T_FLOAT] != NULL && 1063 Universe::_mirrors[T_DOUBLE] != NULL && 1064 Universe::_mirrors[T_BYTE] != NULL && 1065 Universe::_mirrors[T_BOOLEAN] != NULL && 1066 Universe::_mirrors[T_CHAR] != NULL && 1067 Universe::_mirrors[T_LONG] != NULL && 1068 Universe::_mirrors[T_SHORT] != NULL && 1069 Universe::_mirrors[T_VOID] != NULL, "sanity"); 1070 1071 Universe::set_int_mirror(Universe::_mirrors[T_INT]); 1072 Universe::set_float_mirror(Universe::_mirrors[T_FLOAT]); 1073 Universe::set_double_mirror(Universe::_mirrors[T_DOUBLE]); 1074 Universe::set_byte_mirror(Universe::_mirrors[T_BYTE]); 1075 Universe::set_bool_mirror(Universe::_mirrors[T_BOOLEAN]); 1076 Universe::set_char_mirror(Universe::_mirrors[T_CHAR]); 1077 Universe::set_long_mirror(Universe::_mirrors[T_LONG]); 1078 Universe::set_short_mirror(Universe::_mirrors[T_SHORT]); 1079 Universe::set_void_mirror(Universe::_mirrors[T_VOID]); 1080 } 1081 1082 // 1083 // After the mirror object is successfully archived, the archived 1084 // klass is set with _has_archived_raw_mirror flag. 1085 // 1086 // The _has_archived_raw_mirror flag is cleared at runtime when the 1087 // archived mirror is restored. If archived java heap data cannot 1088 // be used at runtime, new mirror object is created for the shared 1089 // class. The _has_archived_raw_mirror is cleared also during the process. 1090 oop java_lang_Class::archive_mirror(Klass* k, TRAPS) { 1091 assert(MetaspaceShared::is_heap_object_archiving_allowed(), 1092 "MetaspaceShared::is_heap_object_archiving_allowed() must be true"); 1093 1094 // Mirror is already archived 1095 if (k->has_raw_archived_mirror()) { 1096 assert(k->archived_java_mirror_raw() != NULL, "no archived mirror"); 1097 return k->archived_java_mirror_raw(); 1098 } 1099 1100 // No mirror 1101 oop mirror = k->java_mirror(); 1102 if (mirror == NULL) { 1103 return NULL; 1104 } 1105 1106 if (k->is_instance_klass()) { 1107 InstanceKlass *ik = InstanceKlass::cast(k); 1108 assert(ik->signers() == NULL && !k->has_signer_and_not_archived(), 1109 "class with signer cannot be supported"); 1110 1111 if (!(ik->is_shared_boot_class() || ik->is_shared_platform_class() || 1112 ik->is_shared_app_class())) { 1113 // Archiving mirror for classes from non-builtin loaders is not 1114 // supported. Clear the _java_mirror within the archived class. 1115 k->set_java_mirror_handle(NULL); 1116 return NULL; 1117 } 1118 } 1119 1120 // Now start archiving the mirror object 1121 oop archived_mirror = MetaspaceShared::archive_heap_object(mirror, THREAD); 1122 if (archived_mirror == NULL) { 1123 return NULL; 1124 } 1125 1126 archived_mirror = process_archived_mirror(k, mirror, archived_mirror, THREAD); 1127 if (archived_mirror == NULL) { 1128 return NULL; 1129 } 1130 1131 k->set_archived_java_mirror_raw(archived_mirror); 1132 1133 k->set_has_raw_archived_mirror(); 1134 1135 ResourceMark rm; 1136 log_trace(cds, mirror)("Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT, 1137 k->external_name(), p2i(mirror), p2i(archived_mirror)); 1138 1139 return archived_mirror; 1140 } 1141 1142 // The process is based on create_mirror(). 1143 oop java_lang_Class::process_archived_mirror(Klass* k, oop mirror, 1144 oop archived_mirror, 1145 Thread *THREAD) { 1146 // Clear nonstatic fields in archived mirror. Some of the fields will be set 1147 // to archived metadata and objects below. 1148 Klass *c = archived_mirror->klass(); 1149 Handle archived_mirror_h(THREAD, archived_mirror); 1150 ResetMirrorField reset(archived_mirror_h); 1151 InstanceKlass::cast(c)->do_nonstatic_fields(&reset); 1152 1153 if (k->is_array_klass()) { 1154 oop archived_comp_mirror; 1155 if (k->is_typeArray_klass()) { 1156 // The primitive type mirrors are already archived. Get the archived mirror. 1157 oop comp_mirror = java_lang_Class::component_mirror(mirror); 1158 archived_comp_mirror = MetaspaceShared::find_archived_heap_object(comp_mirror); 1159 assert(archived_comp_mirror != NULL, "Must be"); 1160 } else { 1161 assert(k->is_objArray_klass(), "Must be"); 1162 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass(); 1163 assert(element_klass != NULL, "Must have an element klass"); 1164 archived_comp_mirror = archive_mirror(element_klass, THREAD); 1165 if (archived_comp_mirror == NULL) { 1166 return NULL; 1167 } 1168 } 1169 java_lang_Class::set_component_mirror(archived_mirror, archived_comp_mirror); 1170 } else { 1171 assert(k->is_instance_klass(), "Must be"); 1172 1173 // Reset local static fields in the mirror 1174 InstanceKlass::cast(k)->do_local_static_fields(&reset); 1175 1176 java_lang_Class:set_init_lock(archived_mirror, NULL); 1177 1178 set_protection_domain(archived_mirror, NULL); 1179 } 1180 1181 // clear class loader and mirror_module_field 1182 set_class_loader(archived_mirror, NULL); 1183 set_module(archived_mirror, NULL); 1184 1185 // The archived mirror's field at _klass_offset is still pointing to the original 1186 // klass. Updated the field in the archived mirror to point to the relocated 1187 // klass in the archive. 1188 Klass *reloc_k = MetaspaceShared::get_relocated_klass(as_Klass(mirror)); 1189 log_debug(cds, mirror)("Relocate mirror metadata field at _klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT, 1190 p2i(as_Klass(mirror)), p2i(reloc_k)); 1191 archived_mirror->metadata_field_put(_klass_offset, reloc_k); 1192 1193 // The field at _array_klass_offset is pointing to the original one dimension 1194 // higher array klass if exists. Relocate the pointer. 1195 Klass *arr = array_klass_acquire(mirror); 1196 if (arr != NULL) { 1197 Klass *reloc_arr = MetaspaceShared::get_relocated_klass(arr); 1198 log_debug(cds, mirror)("Relocate mirror metadata field at _array_klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT, 1199 p2i(arr), p2i(reloc_arr)); 1200 archived_mirror->metadata_field_put(_array_klass_offset, reloc_arr); 1201 } 1202 return archived_mirror; 1203 } 1204 1205 // After the archived mirror object is restored, the shared klass' 1206 // _has_raw_archived_mirror flag is cleared 1207 void java_lang_Class::restore_archived_mirror(Klass *k, Handle mirror, 1208 Handle class_loader, Handle module, 1209 Handle protection_domain, TRAPS) { 1210 1211 // The java.lang.Class field offsets were archived and reloaded from archive. 1212 // No need to put classes on the fixup_mirror_list before java.lang.Class 1213 // is loaded. 1214 1215 if (!k->is_array_klass()) { 1216 // - local static final fields with initial values were initialized at dump time 1217 1218 // create the init_lock 1219 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK); 1220 set_init_lock(mirror(), r); 1221 1222 if (protection_domain.not_null()) { 1223 set_protection_domain(mirror(), protection_domain()); 1224 } 1225 } 1226 1227 assert(class_loader() == k->class_loader(), "should be same"); 1228 if (class_loader.not_null()) { 1229 set_class_loader(mirror(), class_loader()); 1230 } 1231 1232 k->set_java_mirror(mirror); 1233 k->clear_has_raw_archived_mirror(); 1234 1235 set_mirror_module_field(k, mirror, module, THREAD); 1236 1237 ResourceMark rm; 1238 log_trace(cds, mirror)("Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror())); 1239 } 1240 #endif // INCLUDE_CDS_JAVA_HEAP 1241 1242 void java_lang_Class::fixup_module_field(Klass* k, Handle module) { 1243 assert(_module_offset != 0, "must have been computed already"); 1244 java_lang_Class::set_module(k->java_mirror(), module()); 1245 } 1246 1247 int java_lang_Class::oop_size(oop java_class) { 1248 assert(_oop_size_offset != 0, "must be set"); 1249 int size = java_class->int_field(_oop_size_offset); 1250 assert(size > 0, "Oop size must be greater than zero, not %d", size); 1251 return size; 1252 } 1253 1254 void java_lang_Class::set_oop_size(oop java_class, int size) { 1255 assert(_oop_size_offset != 0, "must be set"); 1256 assert(size > 0, "Oop size must be greater than zero, not %d", size); 1257 java_class->int_field_put(_oop_size_offset, size); 1258 } 1259 1260 int java_lang_Class::static_oop_field_count(oop java_class) { 1261 assert(_static_oop_field_count_offset != 0, "must be set"); 1262 return java_class->int_field(_static_oop_field_count_offset); 1263 } 1264 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) { 1265 assert(_static_oop_field_count_offset != 0, "must be set"); 1266 java_class->int_field_put(_static_oop_field_count_offset, size); 1267 } 1268 1269 oop java_lang_Class::protection_domain(oop java_class) { 1270 assert(_protection_domain_offset != 0, "must be set"); 1271 return java_class->obj_field(_protection_domain_offset); 1272 } 1273 void java_lang_Class::set_protection_domain(oop java_class, oop pd) { 1274 assert(_protection_domain_offset != 0, "must be set"); 1275 java_class->obj_field_put(_protection_domain_offset, pd); 1276 } 1277 1278 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) { 1279 assert(_component_mirror_offset != 0, "must be set"); 1280 java_class->obj_field_put(_component_mirror_offset, comp_mirror); 1281 } 1282 oop java_lang_Class::component_mirror(oop java_class) { 1283 assert(_component_mirror_offset != 0, "must be set"); 1284 return java_class->obj_field(_component_mirror_offset); 1285 } 1286 1287 oop java_lang_Class::init_lock(oop java_class) { 1288 assert(_init_lock_offset != 0, "must be set"); 1289 return java_class->obj_field(_init_lock_offset); 1290 } 1291 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) { 1292 assert(_init_lock_offset != 0, "must be set"); 1293 java_class->obj_field_put(_init_lock_offset, init_lock); 1294 } 1295 1296 objArrayOop java_lang_Class::signers(oop java_class) { 1297 assert(_signers_offset != 0, "must be set"); 1298 return (objArrayOop)java_class->obj_field(_signers_offset); 1299 } 1300 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) { 1301 assert(_signers_offset != 0, "must be set"); 1302 java_class->obj_field_put(_signers_offset, (oop)signers); 1303 } 1304 1305 1306 void java_lang_Class::set_class_loader(oop java_class, oop loader) { 1307 // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet. 1308 if (_class_loader_offset != 0) { 1309 java_class->obj_field_put(_class_loader_offset, loader); 1310 } 1311 } 1312 1313 oop java_lang_Class::class_loader(oop java_class) { 1314 assert(_class_loader_offset != 0, "must be set"); 1315 return java_class->obj_field(_class_loader_offset); 1316 } 1317 1318 oop java_lang_Class::module(oop java_class) { 1319 assert(_module_offset != 0, "must be set"); 1320 return java_class->obj_field(_module_offset); 1321 } 1322 1323 void java_lang_Class::set_module(oop java_class, oop module) { 1324 assert(_module_offset != 0, "must be set"); 1325 java_class->obj_field_put(_module_offset, module); 1326 } 1327 1328 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) { 1329 // This should be improved by adding a field at the Java level or by 1330 // introducing a new VM klass (see comment in ClassFileParser) 1331 oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0); 1332 if (type != T_VOID) { 1333 Klass* aklass = Universe::typeArrayKlassObj(type); 1334 assert(aklass != NULL, "correct bootstrap"); 1335 release_set_array_klass(java_class, aklass); 1336 } 1337 #ifdef ASSERT 1338 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass()); 1339 assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation"); 1340 #endif 1341 return java_class; 1342 } 1343 1344 1345 Klass* java_lang_Class::as_Klass(oop java_class) { 1346 //%note memory_2 1347 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1348 Klass* k = ((Klass*)java_class->metadata_field(_klass_offset)); 1349 assert(k == NULL || k->is_klass(), "type check"); 1350 return k; 1351 } 1352 1353 1354 void java_lang_Class::set_klass(oop java_class, Klass* klass) { 1355 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1356 java_class->metadata_field_put(_klass_offset, klass); 1357 } 1358 1359 1360 void java_lang_Class::print_signature(oop java_class, outputStream* st) { 1361 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1362 Symbol* name = NULL; 1363 bool is_instance = false; 1364 if (is_primitive(java_class)) { 1365 name = vmSymbols::type_signature(primitive_type(java_class)); 1366 } else { 1367 Klass* k = as_Klass(java_class); 1368 is_instance = k->is_instance_klass(); 1369 name = k->name(); 1370 } 1371 if (name == NULL) { 1372 st->print("<null>"); 1373 return; 1374 } 1375 if (is_instance) st->print("L"); 1376 st->write((char*) name->base(), (int) name->utf8_length()); 1377 if (is_instance) st->print(";"); 1378 } 1379 1380 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) { 1381 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1382 Symbol* name; 1383 if (is_primitive(java_class)) { 1384 name = vmSymbols::type_signature(primitive_type(java_class)); 1385 // Because this can create a new symbol, the caller has to decrement 1386 // the refcount, so make adjustment here and below for symbols returned 1387 // that are not created or incremented due to a successful lookup. 1388 name->increment_refcount(); 1389 } else { 1390 Klass* k = as_Klass(java_class); 1391 if (!k->is_instance_klass()) { 1392 name = k->name(); 1393 name->increment_refcount(); 1394 } else { 1395 ResourceMark rm; 1396 const char* sigstr = k->signature_name(); 1397 int siglen = (int) strlen(sigstr); 1398 if (!intern_if_not_found) { 1399 name = SymbolTable::probe(sigstr, siglen); 1400 } else { 1401 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 1402 } 1403 } 1404 } 1405 return name; 1406 } 1407 1408 // Returns the Java name for this Java mirror (Resource allocated) 1409 // See Klass::external_name(). 1410 // For primitive type Java mirrors, its type name is returned. 1411 const char* java_lang_Class::as_external_name(oop java_class) { 1412 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1413 const char* name = NULL; 1414 if (is_primitive(java_class)) { 1415 name = type2name(primitive_type(java_class)); 1416 } else { 1417 name = as_Klass(java_class)->external_name(); 1418 } 1419 if (name == NULL) { 1420 name = "<null>"; 1421 } 1422 return name; 1423 } 1424 1425 Klass* java_lang_Class::array_klass_acquire(oop java_class) { 1426 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset)); 1427 assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass"); 1428 return k; 1429 } 1430 1431 1432 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) { 1433 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass"); 1434 java_class->release_metadata_field_put(_array_klass_offset, klass); 1435 } 1436 1437 1438 bool java_lang_Class::is_primitive(oop java_class) { 1439 // should assert: 1440 //assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1441 bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL); 1442 1443 #ifdef ASSERT 1444 if (is_primitive) { 1445 Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1446 assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()), 1447 "Should be either the T_VOID primitive or a java primitive"); 1448 } 1449 #endif 1450 1451 return is_primitive; 1452 } 1453 1454 1455 BasicType java_lang_Class::primitive_type(oop java_class) { 1456 assert(java_lang_Class::is_primitive(java_class), "just checking"); 1457 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1458 BasicType type = T_VOID; 1459 if (ak != NULL) { 1460 // Note: create_basic_type_mirror above initializes ak to a non-null value. 1461 type = ArrayKlass::cast(ak)->element_type(); 1462 } else { 1463 assert(java_class == Universe::void_mirror(), "only valid non-array primitive"); 1464 } 1465 assert(Universe::java_mirror(type) == java_class, "must be consistent"); 1466 return type; 1467 } 1468 1469 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) { 1470 assert(java_lang_Class::is_instance(java_class), "must be a Class object"); 1471 if (is_primitive(java_class)) { 1472 if (reference_klass != NULL) 1473 (*reference_klass) = NULL; 1474 return primitive_type(java_class); 1475 } else { 1476 if (reference_klass != NULL) 1477 (*reference_klass) = as_Klass(java_class); 1478 return T_OBJECT; 1479 } 1480 } 1481 1482 1483 oop java_lang_Class::primitive_mirror(BasicType t) { 1484 oop mirror = Universe::java_mirror(t); 1485 assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class"); 1486 assert(java_lang_Class::is_primitive(mirror), "must be primitive"); 1487 return mirror; 1488 } 1489 1490 bool java_lang_Class::offsets_computed = false; 1491 int java_lang_Class::classRedefinedCount_offset = -1; 1492 1493 #define CLASS_FIELDS_DO(macro) \ 1494 macro(classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false) ; \ 1495 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \ 1496 macro(_component_mirror_offset, k, "componentType", class_signature, false); \ 1497 macro(_module_offset, k, "module", module_signature, false) 1498 1499 void java_lang_Class::compute_offsets() { 1500 if (offsets_computed) { 1501 return; 1502 } 1503 1504 offsets_computed = true; 1505 1506 InstanceKlass* k = SystemDictionary::Class_klass(); 1507 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1508 1509 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have 1510 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops 1511 // GC treats them the same. 1512 _init_lock_offset = _component_mirror_offset; 1513 1514 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 1515 } 1516 1517 #if INCLUDE_CDS 1518 void java_lang_Class::serialize(SerializeClosure* f) { 1519 f->do_u4((u4*)&offsets_computed); 1520 f->do_u4((u4*)&_init_lock_offset); 1521 1522 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1523 1524 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 1525 } 1526 #endif 1527 1528 int java_lang_Class::classRedefinedCount(oop the_class_mirror) { 1529 if (classRedefinedCount_offset == -1) { 1530 // If we don't have an offset for it then just return -1 as a marker. 1531 return -1; 1532 } 1533 1534 return the_class_mirror->int_field(classRedefinedCount_offset); 1535 } 1536 1537 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) { 1538 if (classRedefinedCount_offset == -1) { 1539 // If we don't have an offset for it then nothing to set. 1540 return; 1541 } 1542 1543 the_class_mirror->int_field_put(classRedefinedCount_offset, value); 1544 } 1545 1546 1547 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the 1548 // platform thread structure, and a eetop offset which was used for thread 1549 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures 1550 // merged, so in the HotSpot VM we just use the eetop field for the thread 1551 // instead of the privateInfo_offset. 1552 // 1553 // Note: The stackSize field is only present starting in 1.4. 1554 1555 int java_lang_Thread::_name_offset = 0; 1556 int java_lang_Thread::_group_offset = 0; 1557 int java_lang_Thread::_contextClassLoader_offset = 0; 1558 int java_lang_Thread::_inheritedAccessControlContext_offset = 0; 1559 int java_lang_Thread::_priority_offset = 0; 1560 int java_lang_Thread::_eetop_offset = 0; 1561 int java_lang_Thread::_daemon_offset = 0; 1562 int java_lang_Thread::_stillborn_offset = 0; 1563 int java_lang_Thread::_stackSize_offset = 0; 1564 int java_lang_Thread::_tid_offset = 0; 1565 int java_lang_Thread::_thread_status_offset = 0; 1566 int java_lang_Thread::_park_blocker_offset = 0; 1567 int java_lang_Thread::_park_event_offset = 0 ; 1568 1569 #define THREAD_FIELDS_DO(macro) \ 1570 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 1571 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \ 1572 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \ 1573 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \ 1574 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \ 1575 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \ 1576 macro(_eetop_offset, k, "eetop", long_signature, false); \ 1577 macro(_stillborn_offset, k, "stillborn", bool_signature, false); \ 1578 macro(_stackSize_offset, k, "stackSize", long_signature, false); \ 1579 macro(_tid_offset, k, "tid", long_signature, false); \ 1580 macro(_thread_status_offset, k, "threadStatus", int_signature, false); \ 1581 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \ 1582 macro(_park_event_offset, k, "nativeParkEventPointer", long_signature, false) 1583 1584 void java_lang_Thread::compute_offsets() { 1585 assert(_group_offset == 0, "offsets should be initialized only once"); 1586 1587 InstanceKlass* k = SystemDictionary::Thread_klass(); 1588 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1589 } 1590 1591 #if INCLUDE_CDS 1592 void java_lang_Thread::serialize(SerializeClosure* f) { 1593 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1594 } 1595 #endif 1596 1597 JavaThread* java_lang_Thread::thread(oop java_thread) { 1598 return (JavaThread*)java_thread->address_field(_eetop_offset); 1599 } 1600 1601 1602 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) { 1603 java_thread->address_field_put(_eetop_offset, (address)thread); 1604 } 1605 1606 1607 oop java_lang_Thread::name(oop java_thread) { 1608 return java_thread->obj_field(_name_offset); 1609 } 1610 1611 1612 void java_lang_Thread::set_name(oop java_thread, oop name) { 1613 java_thread->obj_field_put(_name_offset, name); 1614 } 1615 1616 1617 ThreadPriority java_lang_Thread::priority(oop java_thread) { 1618 return (ThreadPriority)java_thread->int_field(_priority_offset); 1619 } 1620 1621 1622 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) { 1623 java_thread->int_field_put(_priority_offset, priority); 1624 } 1625 1626 1627 oop java_lang_Thread::threadGroup(oop java_thread) { 1628 return java_thread->obj_field(_group_offset); 1629 } 1630 1631 1632 bool java_lang_Thread::is_stillborn(oop java_thread) { 1633 return java_thread->bool_field(_stillborn_offset) != 0; 1634 } 1635 1636 1637 // We never have reason to turn the stillborn bit off 1638 void java_lang_Thread::set_stillborn(oop java_thread) { 1639 java_thread->bool_field_put(_stillborn_offset, true); 1640 } 1641 1642 1643 bool java_lang_Thread::is_alive(oop java_thread) { 1644 JavaThread* thr = java_lang_Thread::thread(java_thread); 1645 return (thr != NULL); 1646 } 1647 1648 1649 bool java_lang_Thread::is_daemon(oop java_thread) { 1650 return java_thread->bool_field(_daemon_offset) != 0; 1651 } 1652 1653 1654 void java_lang_Thread::set_daemon(oop java_thread) { 1655 java_thread->bool_field_put(_daemon_offset, true); 1656 } 1657 1658 oop java_lang_Thread::context_class_loader(oop java_thread) { 1659 return java_thread->obj_field(_contextClassLoader_offset); 1660 } 1661 1662 oop java_lang_Thread::inherited_access_control_context(oop java_thread) { 1663 return java_thread->obj_field(_inheritedAccessControlContext_offset); 1664 } 1665 1666 1667 jlong java_lang_Thread::stackSize(oop java_thread) { 1668 if (_stackSize_offset > 0) { 1669 return java_thread->long_field(_stackSize_offset); 1670 } else { 1671 return 0; 1672 } 1673 } 1674 1675 // Write the thread status value to threadStatus field in java.lang.Thread java class. 1676 void java_lang_Thread::set_thread_status(oop java_thread, 1677 java_lang_Thread::ThreadStatus status) { 1678 // The threadStatus is only present starting in 1.5 1679 if (_thread_status_offset > 0) { 1680 java_thread->int_field_put(_thread_status_offset, status); 1681 } 1682 } 1683 1684 // Read thread status value from threadStatus field in java.lang.Thread java class. 1685 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) { 1686 // Make sure the caller is operating on behalf of the VM or is 1687 // running VM code (state == _thread_in_vm). 1688 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() || 1689 JavaThread::current()->thread_state() == _thread_in_vm, 1690 "Java Thread is not running in vm"); 1691 // The threadStatus is only present starting in 1.5 1692 if (_thread_status_offset > 0) { 1693 return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1694 } else { 1695 // All we can easily figure out is if it is alive, but that is 1696 // enough info for a valid unknown status. 1697 // These aren't restricted to valid set ThreadStatus values, so 1698 // use JVMTI values and cast. 1699 JavaThread* thr = java_lang_Thread::thread(java_thread); 1700 if (thr == NULL) { 1701 // the thread hasn't run yet or is in the process of exiting 1702 return NEW; 1703 } 1704 return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE; 1705 } 1706 } 1707 1708 1709 jlong java_lang_Thread::thread_id(oop java_thread) { 1710 // The thread ID field is only present starting in 1.5 1711 if (_tid_offset > 0) { 1712 return java_thread->long_field(_tid_offset); 1713 } else { 1714 return 0; 1715 } 1716 } 1717 1718 oop java_lang_Thread::park_blocker(oop java_thread) { 1719 assert(JDK_Version::current().supports_thread_park_blocker() && 1720 _park_blocker_offset != 0, "Must support parkBlocker field"); 1721 1722 if (_park_blocker_offset > 0) { 1723 return java_thread->obj_field(_park_blocker_offset); 1724 } 1725 1726 return NULL; 1727 } 1728 1729 jlong java_lang_Thread::park_event(oop java_thread) { 1730 if (_park_event_offset > 0) { 1731 return java_thread->long_field(_park_event_offset); 1732 } 1733 return 0; 1734 } 1735 1736 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) { 1737 if (_park_event_offset > 0) { 1738 java_thread->long_field_put(_park_event_offset, ptr); 1739 return true; 1740 } 1741 return false; 1742 } 1743 1744 1745 const char* java_lang_Thread::thread_status_name(oop java_thread) { 1746 assert(_thread_status_offset != 0, "Must have thread status"); 1747 ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset); 1748 switch (status) { 1749 case NEW : return "NEW"; 1750 case RUNNABLE : return "RUNNABLE"; 1751 case SLEEPING : return "TIMED_WAITING (sleeping)"; 1752 case IN_OBJECT_WAIT : return "WAITING (on object monitor)"; 1753 case IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)"; 1754 case PARKED : return "WAITING (parking)"; 1755 case PARKED_TIMED : return "TIMED_WAITING (parking)"; 1756 case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)"; 1757 case TERMINATED : return "TERMINATED"; 1758 default : return "UNKNOWN"; 1759 }; 1760 } 1761 int java_lang_ThreadGroup::_parent_offset = 0; 1762 int java_lang_ThreadGroup::_name_offset = 0; 1763 int java_lang_ThreadGroup::_threads_offset = 0; 1764 int java_lang_ThreadGroup::_groups_offset = 0; 1765 int java_lang_ThreadGroup::_maxPriority_offset = 0; 1766 int java_lang_ThreadGroup::_destroyed_offset = 0; 1767 int java_lang_ThreadGroup::_daemon_offset = 0; 1768 int java_lang_ThreadGroup::_nthreads_offset = 0; 1769 int java_lang_ThreadGroup::_ngroups_offset = 0; 1770 1771 oop java_lang_ThreadGroup::parent(oop java_thread_group) { 1772 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1773 return java_thread_group->obj_field(_parent_offset); 1774 } 1775 1776 // ("name as oop" accessor is not necessary) 1777 1778 const char* java_lang_ThreadGroup::name(oop java_thread_group) { 1779 oop name = java_thread_group->obj_field(_name_offset); 1780 // ThreadGroup.name can be null 1781 if (name != NULL) { 1782 return java_lang_String::as_utf8_string(name); 1783 } 1784 return NULL; 1785 } 1786 1787 int java_lang_ThreadGroup::nthreads(oop java_thread_group) { 1788 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1789 return java_thread_group->int_field(_nthreads_offset); 1790 } 1791 1792 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) { 1793 oop threads = java_thread_group->obj_field(_threads_offset); 1794 assert(threads != NULL, "threadgroups should have threads"); 1795 assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code 1796 return objArrayOop(threads); 1797 } 1798 1799 int java_lang_ThreadGroup::ngroups(oop java_thread_group) { 1800 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1801 return java_thread_group->int_field(_ngroups_offset); 1802 } 1803 1804 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) { 1805 oop groups = java_thread_group->obj_field(_groups_offset); 1806 assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code 1807 return objArrayOop(groups); 1808 } 1809 1810 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) { 1811 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1812 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset); 1813 } 1814 1815 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) { 1816 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1817 return java_thread_group->bool_field(_destroyed_offset) != 0; 1818 } 1819 1820 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) { 1821 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1822 return java_thread_group->bool_field(_daemon_offset) != 0; 1823 } 1824 1825 #define THREADGROUP_FIELDS_DO(macro) \ 1826 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \ 1827 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 1828 macro(_threads_offset, k, vmSymbols::threads_name(), thread_array_signature, false); \ 1829 macro(_groups_offset, k, vmSymbols::groups_name(), threadgroup_array_signature, false); \ 1830 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \ 1831 macro(_destroyed_offset, k, vmSymbols::destroyed_name(), bool_signature, false); \ 1832 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \ 1833 macro(_nthreads_offset, k, vmSymbols::nthreads_name(), int_signature, false); \ 1834 macro(_ngroups_offset, k, vmSymbols::ngroups_name(), int_signature, false) 1835 1836 void java_lang_ThreadGroup::compute_offsets() { 1837 assert(_parent_offset == 0, "offsets should be initialized only once"); 1838 1839 InstanceKlass* k = SystemDictionary::ThreadGroup_klass(); 1840 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1841 } 1842 1843 #if INCLUDE_CDS 1844 void java_lang_ThreadGroup::serialize(SerializeClosure* f) { 1845 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1846 } 1847 #endif 1848 1849 #define THROWABLE_FIELDS_DO(macro) \ 1850 macro(backtrace_offset, k, "backtrace", object_signature, false); \ 1851 macro(detailMessage_offset, k, "detailMessage", string_signature, false); \ 1852 macro(stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \ 1853 macro(depth_offset, k, "depth", int_signature, false); \ 1854 macro(static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true) 1855 1856 void java_lang_Throwable::compute_offsets() { 1857 InstanceKlass* k = SystemDictionary::Throwable_klass(); 1858 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1859 } 1860 1861 #if INCLUDE_CDS 1862 void java_lang_Throwable::serialize(SerializeClosure* f) { 1863 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1864 } 1865 #endif 1866 1867 oop java_lang_Throwable::unassigned_stacktrace() { 1868 InstanceKlass* ik = SystemDictionary::Throwable_klass(); 1869 oop base = ik->static_field_base(); 1870 return base->obj_field(static_unassigned_stacktrace_offset); 1871 } 1872 1873 oop java_lang_Throwable::backtrace(oop throwable) { 1874 return throwable->obj_field_acquire(backtrace_offset); 1875 } 1876 1877 1878 void java_lang_Throwable::set_backtrace(oop throwable, oop value) { 1879 throwable->release_obj_field_put(backtrace_offset, value); 1880 } 1881 1882 int java_lang_Throwable::depth(oop throwable) { 1883 return throwable->int_field(depth_offset); 1884 } 1885 1886 void java_lang_Throwable::set_depth(oop throwable, int value) { 1887 throwable->int_field_put(depth_offset, value); 1888 } 1889 1890 oop java_lang_Throwable::message(oop throwable) { 1891 return throwable->obj_field(detailMessage_offset); 1892 } 1893 1894 1895 // Return Symbol for detailed_message or NULL 1896 Symbol* java_lang_Throwable::detail_message(oop throwable) { 1897 PRESERVE_EXCEPTION_MARK; // Keep original exception 1898 oop detailed_message = java_lang_Throwable::message(throwable); 1899 if (detailed_message != NULL) { 1900 return java_lang_String::as_symbol(detailed_message, THREAD); 1901 } 1902 return NULL; 1903 } 1904 1905 void java_lang_Throwable::set_message(oop throwable, oop value) { 1906 throwable->obj_field_put(detailMessage_offset, value); 1907 } 1908 1909 1910 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) { 1911 throwable->obj_field_put(stackTrace_offset, st_element_array); 1912 } 1913 1914 void java_lang_Throwable::clear_stacktrace(oop throwable) { 1915 set_stacktrace(throwable, NULL); 1916 } 1917 1918 1919 void java_lang_Throwable::print(oop throwable, outputStream* st) { 1920 ResourceMark rm; 1921 Klass* k = throwable->klass(); 1922 assert(k != NULL, "just checking"); 1923 st->print("%s", k->external_name()); 1924 oop msg = message(throwable); 1925 if (msg != NULL) { 1926 st->print(": %s", java_lang_String::as_utf8_string(msg)); 1927 } 1928 } 1929 1930 // After this many redefines, the stack trace is unreliable. 1931 const int MAX_VERSION = USHRT_MAX; 1932 1933 static inline bool version_matches(Method* method, int version) { 1934 assert(version < MAX_VERSION, "version is too big"); 1935 return method != NULL && (method->constants()->version() == version); 1936 } 1937 1938 1939 // This class provides a simple wrapper over the internal structure of 1940 // exception backtrace to insulate users of the backtrace from needing 1941 // to know what it looks like. 1942 class BacktraceBuilder: public StackObj { 1943 friend class BacktraceIterator; 1944 private: 1945 Handle _backtrace; 1946 objArrayOop _head; 1947 typeArrayOop _methods; 1948 typeArrayOop _bcis; 1949 objArrayOop _mirrors; 1950 typeArrayOop _names; // needed to insulate method name against redefinition 1951 int _index; 1952 NoSafepointVerifier _nsv; 1953 1954 enum { 1955 trace_methods_offset = java_lang_Throwable::trace_methods_offset, 1956 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset, 1957 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset, 1958 trace_names_offset = java_lang_Throwable::trace_names_offset, 1959 trace_next_offset = java_lang_Throwable::trace_next_offset, 1960 trace_size = java_lang_Throwable::trace_size, 1961 trace_chunk_size = java_lang_Throwable::trace_chunk_size 1962 }; 1963 1964 // get info out of chunks 1965 static typeArrayOop get_methods(objArrayHandle chunk) { 1966 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset)); 1967 assert(methods != NULL, "method array should be initialized in backtrace"); 1968 return methods; 1969 } 1970 static typeArrayOop get_bcis(objArrayHandle chunk) { 1971 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 1972 assert(bcis != NULL, "bci array should be initialized in backtrace"); 1973 return bcis; 1974 } 1975 static objArrayOop get_mirrors(objArrayHandle chunk) { 1976 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset)); 1977 assert(mirrors != NULL, "mirror array should be initialized in backtrace"); 1978 return mirrors; 1979 } 1980 static typeArrayOop get_names(objArrayHandle chunk) { 1981 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset)); 1982 assert(names != NULL, "names array should be initialized in backtrace"); 1983 return names; 1984 } 1985 1986 public: 1987 1988 // constructor for new backtrace 1989 BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL), _names(NULL) { 1990 expand(CHECK); 1991 _backtrace = Handle(THREAD, _head); 1992 _index = 0; 1993 } 1994 1995 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) { 1996 _methods = get_methods(backtrace); 1997 _bcis = get_bcis(backtrace); 1998 _mirrors = get_mirrors(backtrace); 1999 _names = get_names(backtrace); 2000 assert(_methods->length() == _bcis->length() && 2001 _methods->length() == _mirrors->length() && 2002 _mirrors->length() == _names->length(), 2003 "method and source information arrays should match"); 2004 2005 // head is the preallocated backtrace 2006 _head = backtrace(); 2007 _backtrace = Handle(thread, _head); 2008 _index = 0; 2009 } 2010 2011 void expand(TRAPS) { 2012 objArrayHandle old_head(THREAD, _head); 2013 PauseNoSafepointVerifier pnsv(&_nsv); 2014 2015 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK); 2016 objArrayHandle new_head(THREAD, head); 2017 2018 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK); 2019 typeArrayHandle new_methods(THREAD, methods); 2020 2021 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK); 2022 typeArrayHandle new_bcis(THREAD, bcis); 2023 2024 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK); 2025 objArrayHandle new_mirrors(THREAD, mirrors); 2026 2027 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK); 2028 typeArrayHandle new_names(THREAD, names); 2029 2030 if (!old_head.is_null()) { 2031 old_head->obj_at_put(trace_next_offset, new_head()); 2032 } 2033 new_head->obj_at_put(trace_methods_offset, new_methods()); 2034 new_head->obj_at_put(trace_bcis_offset, new_bcis()); 2035 new_head->obj_at_put(trace_mirrors_offset, new_mirrors()); 2036 new_head->obj_at_put(trace_names_offset, new_names()); 2037 2038 _head = new_head(); 2039 _methods = new_methods(); 2040 _bcis = new_bcis(); 2041 _mirrors = new_mirrors(); 2042 _names = new_names(); 2043 _index = 0; 2044 } 2045 2046 oop backtrace() { 2047 return _backtrace(); 2048 } 2049 2050 inline void push(Method* method, int bci, TRAPS) { 2051 // Smear the -1 bci to 0 since the array only holds unsigned 2052 // shorts. The later line number lookup would just smear the -1 2053 // to a 0 even if it could be recorded. 2054 if (bci == SynchronizationEntryBCI) bci = 0; 2055 2056 if (_index >= trace_chunk_size) { 2057 methodHandle mhandle(THREAD, method); 2058 expand(CHECK); 2059 method = mhandle(); 2060 } 2061 2062 _methods->ushort_at_put(_index, method->orig_method_idnum()); 2063 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version())); 2064 2065 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the 2066 // klass owning the symbols alive so their refcounts aren't decremented. 2067 Symbol* name = method->name(); 2068 _names->symbol_at_put(_index, name); 2069 2070 // We need to save the mirrors in the backtrace to keep the class 2071 // from being unloaded while we still have this stack trace. 2072 assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror"); 2073 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror()); 2074 _index++; 2075 } 2076 2077 }; 2078 2079 struct BacktraceElement : public StackObj { 2080 int _method_id; 2081 int _bci; 2082 int _version; 2083 Symbol* _name; 2084 Handle _mirror; 2085 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) : 2086 _mirror(mirror), _method_id(mid), _version(version), _bci(bci), _name(name) {} 2087 }; 2088 2089 class BacktraceIterator : public StackObj { 2090 int _index; 2091 objArrayHandle _result; 2092 objArrayHandle _mirrors; 2093 typeArrayHandle _methods; 2094 typeArrayHandle _bcis; 2095 typeArrayHandle _names; 2096 2097 void init(objArrayHandle result, Thread* thread) { 2098 // Get method id, bci, version and mirror from chunk 2099 _result = result; 2100 if (_result.not_null()) { 2101 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result)); 2102 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result)); 2103 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result)); 2104 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result)); 2105 _index = 0; 2106 } 2107 } 2108 public: 2109 BacktraceIterator(objArrayHandle result, Thread* thread) { 2110 init(result, thread); 2111 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match"); 2112 } 2113 2114 BacktraceElement next(Thread* thread) { 2115 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)), 2116 _methods->ushort_at(_index), 2117 Backtrace::version_at(_bcis->int_at(_index)), 2118 Backtrace::bci_at(_bcis->int_at(_index)), 2119 _names->symbol_at(_index)); 2120 _index++; 2121 2122 if (_index >= java_lang_Throwable::trace_chunk_size) { 2123 int next_offset = java_lang_Throwable::trace_next_offset; 2124 // Get next chunk 2125 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset))); 2126 init(result, thread); 2127 } 2128 return e; 2129 } 2130 2131 bool repeat() { 2132 return _result.not_null() && _mirrors->obj_at(_index) != NULL; 2133 } 2134 }; 2135 2136 2137 // Print stack trace element to resource allocated buffer 2138 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id, 2139 int version, int bci, Symbol* name) { 2140 ResourceMark rm; 2141 2142 // Get strings and string lengths 2143 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 2144 const char* klass_name = holder->external_name(); 2145 int buf_len = (int)strlen(klass_name); 2146 2147 char* method_name = name->as_C_string(); 2148 buf_len += (int)strlen(method_name); 2149 2150 char* source_file_name = NULL; 2151 Symbol* source = Backtrace::get_source_file_name(holder, version); 2152 if (source != NULL) { 2153 source_file_name = source->as_C_string(); 2154 buf_len += (int)strlen(source_file_name); 2155 } 2156 2157 char *module_name = NULL, *module_version = NULL; 2158 ModuleEntry* module = holder->module(); 2159 if (module->is_named()) { 2160 module_name = module->name()->as_C_string(); 2161 buf_len += (int)strlen(module_name); 2162 if (module->version() != NULL) { 2163 module_version = module->version()->as_C_string(); 2164 buf_len += (int)strlen(module_version); 2165 } 2166 } 2167 2168 // Allocate temporary buffer with extra space for formatting and line number 2169 char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64); 2170 2171 // Print stack trace line in buffer 2172 sprintf(buf, "\tat %s.%s(", klass_name, method_name); 2173 2174 // Print module information 2175 if (module_name != NULL) { 2176 if (module_version != NULL) { 2177 sprintf(buf + (int)strlen(buf), "%s@%s/", module_name, module_version); 2178 } else { 2179 sprintf(buf + (int)strlen(buf), "%s/", module_name); 2180 } 2181 } 2182 2183 // The method can be NULL if the requested class version is gone 2184 Method* method = holder->method_with_orig_idnum(method_id, version); 2185 if (!version_matches(method, version)) { 2186 strcat(buf, "Redefined)"); 2187 } else { 2188 int line_number = Backtrace::get_line_number(method, bci); 2189 if (line_number == -2) { 2190 strcat(buf, "Native Method)"); 2191 } else { 2192 if (source_file_name != NULL && (line_number != -1)) { 2193 // Sourcename and linenumber 2194 sprintf(buf + (int)strlen(buf), "%s:%d)", source_file_name, line_number); 2195 } else if (source_file_name != NULL) { 2196 // Just sourcename 2197 sprintf(buf + (int)strlen(buf), "%s)", source_file_name); 2198 } else { 2199 // Neither sourcename nor linenumber 2200 sprintf(buf + (int)strlen(buf), "Unknown Source)"); 2201 } 2202 CompiledMethod* nm = method->code(); 2203 if (WizardMode && nm != NULL) { 2204 sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm); 2205 } 2206 } 2207 } 2208 2209 st->print_cr("%s", buf); 2210 } 2211 2212 void java_lang_Throwable::print_stack_element(outputStream *st, const methodHandle& method, int bci) { 2213 Handle mirror (Thread::current(), method->method_holder()->java_mirror()); 2214 int method_id = method->orig_method_idnum(); 2215 int version = method->constants()->version(); 2216 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name()); 2217 } 2218 2219 /** 2220 * Print the throwable message and its stack trace plus all causes by walking the 2221 * cause chain. The output looks the same as of Throwable.printStackTrace(). 2222 */ 2223 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) { 2224 // First, print the message. 2225 print(throwable(), st); 2226 st->cr(); 2227 2228 // Now print the stack trace. 2229 Thread* THREAD = Thread::current(); 2230 while (throwable.not_null()) { 2231 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable()))); 2232 if (result.is_null()) { 2233 st->print_raw_cr("\t<<no stack trace available>>"); 2234 return; 2235 } 2236 BacktraceIterator iter(result, THREAD); 2237 2238 while (iter.repeat()) { 2239 BacktraceElement bte = iter.next(THREAD); 2240 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name); 2241 } 2242 { 2243 // Call getCause() which doesn't necessarily return the _cause field. 2244 EXCEPTION_MARK; 2245 JavaValue cause(T_OBJECT); 2246 JavaCalls::call_virtual(&cause, 2247 throwable, 2248 throwable->klass(), 2249 vmSymbols::getCause_name(), 2250 vmSymbols::void_throwable_signature(), 2251 THREAD); 2252 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 2253 if (HAS_PENDING_EXCEPTION) { 2254 CLEAR_PENDING_EXCEPTION; 2255 throwable = Handle(); 2256 } else { 2257 throwable = Handle(THREAD, (oop) cause.get_jobject()); 2258 if (throwable.not_null()) { 2259 st->print("Caused by: "); 2260 print(throwable(), st); 2261 st->cr(); 2262 } 2263 } 2264 } 2265 } 2266 } 2267 2268 /** 2269 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace(). 2270 */ 2271 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) { 2272 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected"); 2273 JavaValue result(T_VOID); 2274 JavaCalls::call_virtual(&result, 2275 throwable, 2276 SystemDictionary::Throwable_klass(), 2277 vmSymbols::printStackTrace_name(), 2278 vmSymbols::void_method_signature(), 2279 THREAD); 2280 } 2281 2282 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) { 2283 if (!StackTraceInThrowable) return; 2284 ResourceMark rm(THREAD); 2285 2286 // Start out by clearing the backtrace for this object, in case the VM 2287 // runs out of memory while allocating the stack trace 2288 set_backtrace(throwable(), NULL); 2289 // Clear lazily constructed Java level stacktrace if refilling occurs 2290 // This is unnecessary in 1.7+ but harmless 2291 clear_stacktrace(throwable()); 2292 2293 int max_depth = MaxJavaStackTraceDepth; 2294 JavaThread* thread = (JavaThread*)THREAD; 2295 2296 BacktraceBuilder bt(CHECK); 2297 2298 // If there is no Java frame just return the method that was being called 2299 // with bci 0 2300 if (!thread->has_last_Java_frame()) { 2301 if (max_depth >= 1 && method() != NULL) { 2302 bt.push(method(), 0, CHECK); 2303 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1); 2304 set_depth(throwable(), 1); 2305 set_backtrace(throwable(), bt.backtrace()); 2306 } 2307 return; 2308 } 2309 2310 // Instead of using vframe directly, this version of fill_in_stack_trace 2311 // basically handles everything by hand. This significantly improved the 2312 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows. 2313 // See bug 6333838 for more details. 2314 // The "ASSERT" here is to verify this method generates the exactly same stack 2315 // trace as utilizing vframe. 2316 #ifdef ASSERT 2317 vframeStream st(thread); 2318 methodHandle st_method(THREAD, st.method()); 2319 #endif 2320 int total_count = 0; 2321 RegisterMap map(thread, false); 2322 int decode_offset = 0; 2323 CompiledMethod* nm = NULL; 2324 bool skip_fillInStackTrace_check = false; 2325 bool skip_throwableInit_check = false; 2326 bool skip_hidden = !ShowHiddenFrames; 2327 2328 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) { 2329 Method* method = NULL; 2330 int bci = 0; 2331 2332 // Compiled java method case. 2333 if (decode_offset != 0) { 2334 DebugInfoReadStream stream(nm, decode_offset); 2335 decode_offset = stream.read_int(); 2336 method = (Method*)nm->metadata_at(stream.read_int()); 2337 bci = stream.read_bci(); 2338 } else { 2339 if (fr.is_first_frame()) break; 2340 address pc = fr.pc(); 2341 if (fr.is_interpreted_frame()) { 2342 address bcp = fr.interpreter_frame_bcp(); 2343 method = fr.interpreter_frame_method(); 2344 bci = method->bci_from(bcp); 2345 fr = fr.sender(&map); 2346 } else { 2347 CodeBlob* cb = fr.cb(); 2348 // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL 2349 // but non nmethod 2350 fr = fr.sender(&map); 2351 if (cb == NULL || !cb->is_compiled()) { 2352 continue; 2353 } 2354 nm = cb->as_compiled_method(); 2355 if (nm->method()->is_native()) { 2356 method = nm->method(); 2357 bci = 0; 2358 } else { 2359 PcDesc* pd = nm->pc_desc_at(pc); 2360 decode_offset = pd->scope_decode_offset(); 2361 // if decode_offset is not equal to 0, it will execute the 2362 // "compiled java method case" at the beginning of the loop. 2363 continue; 2364 } 2365 } 2366 } 2367 #ifdef ASSERT 2368 assert(st_method() == method && st.bci() == bci, 2369 "Wrong stack trace"); 2370 st.next(); 2371 // vframeStream::method isn't GC-safe so store off a copy 2372 // of the Method* in case we GC. 2373 if (!st.at_end()) { 2374 st_method = st.method(); 2375 } 2376 #endif 2377 2378 // the format of the stacktrace will be: 2379 // - 1 or more fillInStackTrace frames for the exception class (skipped) 2380 // - 0 or more <init> methods for the exception class (skipped) 2381 // - rest of the stack 2382 2383 if (!skip_fillInStackTrace_check) { 2384 if (method->name() == vmSymbols::fillInStackTrace_name() && 2385 throwable->is_a(method->method_holder())) { 2386 continue; 2387 } 2388 else { 2389 skip_fillInStackTrace_check = true; // gone past them all 2390 } 2391 } 2392 if (!skip_throwableInit_check) { 2393 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering"); 2394 2395 // skip <init> methods of the exception class and superclasses 2396 // This is simlar to classic VM. 2397 if (method->name() == vmSymbols::object_initializer_name() && 2398 throwable->is_a(method->method_holder())) { 2399 continue; 2400 } else { 2401 // there are none or we've seen them all - either way stop checking 2402 skip_throwableInit_check = true; 2403 } 2404 } 2405 if (method->is_hidden()) { 2406 if (skip_hidden) continue; 2407 } 2408 bt.push(method, bci, CHECK); 2409 total_count++; 2410 } 2411 2412 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count); 2413 2414 // Put completed stack trace into throwable object 2415 set_backtrace(throwable(), bt.backtrace()); 2416 set_depth(throwable(), total_count); 2417 } 2418 2419 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) { 2420 // No-op if stack trace is disabled 2421 if (!StackTraceInThrowable) { 2422 return; 2423 } 2424 2425 // Disable stack traces for some preallocated out of memory errors 2426 if (!Universe::should_fill_in_stack_trace(throwable)) { 2427 return; 2428 } 2429 2430 PRESERVE_EXCEPTION_MARK; 2431 2432 JavaThread* thread = JavaThread::active(); 2433 fill_in_stack_trace(throwable, method, thread); 2434 // ignore exceptions thrown during stack trace filling 2435 CLEAR_PENDING_EXCEPTION; 2436 } 2437 2438 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 2439 // Allocate stack trace - backtrace is created but not filled in 2440 2441 // No-op if stack trace is disabled 2442 if (!StackTraceInThrowable) return; 2443 BacktraceBuilder bt(CHECK); // creates a backtrace 2444 set_backtrace(throwable(), bt.backtrace()); 2445 } 2446 2447 2448 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 2449 // Fill in stack trace into preallocated backtrace (no GC) 2450 2451 // No-op if stack trace is disabled 2452 if (!StackTraceInThrowable) return; 2453 2454 assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check"); 2455 2456 JavaThread* THREAD = JavaThread::current(); 2457 2458 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable())); 2459 assert(backtrace.not_null(), "backtrace should have been preallocated"); 2460 2461 ResourceMark rm(THREAD); 2462 vframeStream st(THREAD); 2463 2464 BacktraceBuilder bt(THREAD, backtrace); 2465 2466 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 2467 // methods as preallocated errors aren't created by "java" code. 2468 2469 // fill in as much stack trace as possible 2470 int chunk_count = 0; 2471 for (;!st.at_end(); st.next()) { 2472 bt.push(st.method(), st.bci(), CHECK); 2473 chunk_count++; 2474 2475 // Bail-out for deep stacks 2476 if (chunk_count >= trace_chunk_size) break; 2477 } 2478 set_depth(throwable(), chunk_count); 2479 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count); 2480 2481 // We support the Throwable immutability protocol defined for Java 7. 2482 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace()); 2483 assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized"); 2484 } 2485 2486 void java_lang_Throwable::get_stack_trace_elements(Handle throwable, 2487 objArrayHandle stack_trace_array_h, TRAPS) { 2488 2489 if (throwable.is_null() || stack_trace_array_h.is_null()) { 2490 THROW(vmSymbols::java_lang_NullPointerException()); 2491 } 2492 2493 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent"); 2494 2495 if (stack_trace_array_h->length() != depth(throwable())) { 2496 THROW(vmSymbols::java_lang_IndexOutOfBoundsException()); 2497 } 2498 2499 objArrayHandle result(THREAD, objArrayOop(backtrace(throwable()))); 2500 BacktraceIterator iter(result, THREAD); 2501 2502 int index = 0; 2503 while (iter.repeat()) { 2504 BacktraceElement bte = iter.next(THREAD); 2505 2506 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++)); 2507 2508 if (stack_trace_element.is_null()) { 2509 THROW(vmSymbols::java_lang_NullPointerException()); 2510 } 2511 2512 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror())); 2513 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version)); 2514 2515 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, 2516 method, 2517 bte._version, 2518 bte._bci, 2519 bte._name, CHECK); 2520 } 2521 } 2522 2523 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) { 2524 // Allocate java.lang.StackTraceElement instance 2525 InstanceKlass* k = SystemDictionary::StackTraceElement_klass(); 2526 assert(k != NULL, "must be loaded in 1.4+"); 2527 if (k->should_be_initialized()) { 2528 k->initialize(CHECK_0); 2529 } 2530 2531 Handle element = k->allocate_instance_handle(CHECK_0); 2532 2533 int version = method->constants()->version(); 2534 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_0); 2535 return element(); 2536 } 2537 2538 void java_lang_StackTraceElement::fill_in(Handle element, 2539 InstanceKlass* holder, const methodHandle& method, 2540 int version, int bci, Symbol* name, TRAPS) { 2541 assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check"); 2542 2543 // Fill in class name 2544 ResourceMark rm(THREAD); 2545 const char* str = holder->external_name(); 2546 oop classname = StringTable::intern((char*) str, CHECK); 2547 java_lang_StackTraceElement::set_declaringClass(element(), classname); 2548 java_lang_StackTraceElement::set_declaringClassObject(element(), holder->java_mirror()); 2549 2550 oop loader = holder->class_loader(); 2551 if (loader != NULL) { 2552 oop loader_name = java_lang_ClassLoader::name(loader); 2553 if (loader_name != NULL) 2554 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name); 2555 } 2556 2557 // Fill in method name 2558 oop methodname = StringTable::intern(name, CHECK); 2559 java_lang_StackTraceElement::set_methodName(element(), methodname); 2560 2561 // Fill in module name and version 2562 ModuleEntry* module = holder->module(); 2563 if (module->is_named()) { 2564 oop module_name = StringTable::intern(module->name(), CHECK); 2565 java_lang_StackTraceElement::set_moduleName(element(), module_name); 2566 oop module_version; 2567 if (module->version() != NULL) { 2568 module_version = StringTable::intern(module->version(), CHECK); 2569 } else { 2570 module_version = NULL; 2571 } 2572 java_lang_StackTraceElement::set_moduleVersion(element(), module_version); 2573 } 2574 2575 if (method() == NULL || !version_matches(method(), version)) { 2576 // The method was redefined, accurate line number information isn't available 2577 java_lang_StackTraceElement::set_fileName(element(), NULL); 2578 java_lang_StackTraceElement::set_lineNumber(element(), -1); 2579 } else { 2580 // Fill in source file name and line number. 2581 Symbol* source = Backtrace::get_source_file_name(holder, version); 2582 if (ShowHiddenFrames && source == NULL) 2583 source = vmSymbols::unknown_class_name(); 2584 oop filename = StringTable::intern(source, CHECK); 2585 java_lang_StackTraceElement::set_fileName(element(), filename); 2586 2587 int line_number = Backtrace::get_line_number(method, bci); 2588 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 2589 } 2590 } 2591 2592 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) { 2593 Handle mname(THREAD, stackFrame->obj_field(_memberName_offset)); 2594 Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname()); 2595 // we should expand MemberName::name when Throwable uses StackTrace 2596 // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL); 2597 return method; 2598 } 2599 2600 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, TRAPS) { 2601 // set Method* or mid/cpref 2602 Handle mname(Thread::current(), stackFrame->obj_field(_memberName_offset)); 2603 InstanceKlass* ik = method->method_holder(); 2604 CallInfo info(method(), ik, CHECK); 2605 MethodHandles::init_method_MemberName(mname, info); 2606 // set bci 2607 java_lang_StackFrameInfo::set_bci(stackFrame(), bci); 2608 // method may be redefined; store the version 2609 int version = method->constants()->version(); 2610 assert((jushort)version == version, "version should be short"); 2611 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version); 2612 } 2613 2614 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) { 2615 ResourceMark rm(THREAD); 2616 Handle mname(THREAD, stackFrame->obj_field(java_lang_StackFrameInfo::_memberName_offset)); 2617 Klass* clazz = java_lang_Class::as_Klass(java_lang_invoke_MemberName::clazz(mname())); 2618 InstanceKlass* holder = InstanceKlass::cast(clazz); 2619 Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK); 2620 2621 short version = stackFrame->short_field(_version_offset); 2622 short bci = stackFrame->short_field(_bci_offset); 2623 Symbol* name = method->name(); 2624 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, method, version, bci, name, CHECK); 2625 } 2626 2627 #define STACKFRAMEINFO_FIELDS_DO(macro) \ 2628 macro(_memberName_offset, k, "memberName", object_signature, false); \ 2629 macro(_bci_offset, k, "bci", short_signature, false) 2630 2631 void java_lang_StackFrameInfo::compute_offsets() { 2632 InstanceKlass* k = SystemDictionary::StackFrameInfo_klass(); 2633 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2634 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 2635 } 2636 2637 #if INCLUDE_CDS 2638 void java_lang_StackFrameInfo::serialize(SerializeClosure* f) { 2639 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2640 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 2641 } 2642 #endif 2643 2644 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \ 2645 macro(_monitors_offset, k, "monitors", object_array_signature, false); \ 2646 macro(_locals_offset, k, "locals", object_array_signature, false); \ 2647 macro(_operands_offset, k, "operands", object_array_signature, false); \ 2648 macro(_mode_offset, k, "mode", int_signature, false) 2649 2650 void java_lang_LiveStackFrameInfo::compute_offsets() { 2651 InstanceKlass* k = SystemDictionary::LiveStackFrameInfo_klass(); 2652 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2653 } 2654 2655 #if INCLUDE_CDS 2656 void java_lang_LiveStackFrameInfo::serialize(SerializeClosure* f) { 2657 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2658 } 2659 #endif 2660 2661 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \ 2662 macro(override_offset, k, "override", bool_signature, false) 2663 2664 void java_lang_reflect_AccessibleObject::compute_offsets() { 2665 InstanceKlass* k = SystemDictionary::reflect_AccessibleObject_klass(); 2666 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2667 } 2668 2669 #if INCLUDE_CDS 2670 void java_lang_reflect_AccessibleObject::serialize(SerializeClosure* f) { 2671 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2672 } 2673 #endif 2674 2675 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 2676 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2677 return (jboolean) reflect->bool_field(override_offset); 2678 } 2679 2680 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 2681 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2682 reflect->bool_field_put(override_offset, (int) value); 2683 } 2684 2685 #define METHOD_FIELDS_DO(macro) \ 2686 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 2687 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \ 2688 macro(returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \ 2689 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 2690 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 2691 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 2692 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 2693 macro##_OPTIONAL(signature_offset, k, vmSymbols::signature_name(), string_signature); \ 2694 macro##_OPTIONAL(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature); \ 2695 macro##_OPTIONAL(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature); \ 2696 macro##_OPTIONAL(annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature); \ 2697 macro##_OPTIONAL(type_annotations_offset, k, vmSymbols::type_annotations_name(), byte_array_signature) 2698 2699 void java_lang_reflect_Method::compute_offsets() { 2700 InstanceKlass* k = SystemDictionary::reflect_Method_klass(); 2701 // The generic signature and annotations fields are only present in 1.5 2702 signature_offset = -1; 2703 annotations_offset = -1; 2704 parameter_annotations_offset = -1; 2705 annotation_default_offset = -1; 2706 type_annotations_offset = -1; 2707 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2708 } 2709 2710 #if INCLUDE_CDS 2711 void java_lang_reflect_Method::serialize(SerializeClosure* f) { 2712 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2713 } 2714 #endif 2715 2716 Handle java_lang_reflect_Method::create(TRAPS) { 2717 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2718 Klass* klass = SystemDictionary::reflect_Method_klass(); 2719 // This class is eagerly initialized during VM initialization, since we keep a refence 2720 // to one of the methods 2721 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized"); 2722 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD); 2723 } 2724 2725 oop java_lang_reflect_Method::clazz(oop reflect) { 2726 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2727 return reflect->obj_field(clazz_offset); 2728 } 2729 2730 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 2731 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2732 reflect->obj_field_put(clazz_offset, value); 2733 } 2734 2735 int java_lang_reflect_Method::slot(oop reflect) { 2736 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2737 return reflect->int_field(slot_offset); 2738 } 2739 2740 void java_lang_reflect_Method::set_slot(oop reflect, int value) { 2741 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2742 reflect->int_field_put(slot_offset, value); 2743 } 2744 2745 oop java_lang_reflect_Method::name(oop method) { 2746 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2747 return method->obj_field(name_offset); 2748 } 2749 2750 void java_lang_reflect_Method::set_name(oop method, oop value) { 2751 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2752 method->obj_field_put(name_offset, value); 2753 } 2754 2755 oop java_lang_reflect_Method::return_type(oop method) { 2756 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2757 return method->obj_field(returnType_offset); 2758 } 2759 2760 void java_lang_reflect_Method::set_return_type(oop method, oop value) { 2761 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2762 method->obj_field_put(returnType_offset, value); 2763 } 2764 2765 oop java_lang_reflect_Method::parameter_types(oop method) { 2766 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2767 return method->obj_field(parameterTypes_offset); 2768 } 2769 2770 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 2771 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2772 method->obj_field_put(parameterTypes_offset, value); 2773 } 2774 2775 oop java_lang_reflect_Method::exception_types(oop method) { 2776 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2777 return method->obj_field(exceptionTypes_offset); 2778 } 2779 2780 void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 2781 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2782 method->obj_field_put(exceptionTypes_offset, value); 2783 } 2784 2785 int java_lang_reflect_Method::modifiers(oop method) { 2786 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2787 return method->int_field(modifiers_offset); 2788 } 2789 2790 void java_lang_reflect_Method::set_modifiers(oop method, int value) { 2791 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2792 method->int_field_put(modifiers_offset, value); 2793 } 2794 2795 bool java_lang_reflect_Method::has_signature_field() { 2796 return (signature_offset >= 0); 2797 } 2798 2799 oop java_lang_reflect_Method::signature(oop method) { 2800 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2801 assert(has_signature_field(), "signature field must be present"); 2802 return method->obj_field(signature_offset); 2803 } 2804 2805 void java_lang_reflect_Method::set_signature(oop method, oop value) { 2806 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2807 assert(has_signature_field(), "signature field must be present"); 2808 method->obj_field_put(signature_offset, value); 2809 } 2810 2811 bool java_lang_reflect_Method::has_annotations_field() { 2812 return (annotations_offset >= 0); 2813 } 2814 2815 oop java_lang_reflect_Method::annotations(oop method) { 2816 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2817 assert(has_annotations_field(), "annotations field must be present"); 2818 return method->obj_field(annotations_offset); 2819 } 2820 2821 void java_lang_reflect_Method::set_annotations(oop method, oop value) { 2822 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2823 assert(has_annotations_field(), "annotations field must be present"); 2824 method->obj_field_put(annotations_offset, value); 2825 } 2826 2827 bool java_lang_reflect_Method::has_parameter_annotations_field() { 2828 return (parameter_annotations_offset >= 0); 2829 } 2830 2831 oop java_lang_reflect_Method::parameter_annotations(oop method) { 2832 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2833 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2834 return method->obj_field(parameter_annotations_offset); 2835 } 2836 2837 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 2838 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2839 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 2840 method->obj_field_put(parameter_annotations_offset, value); 2841 } 2842 2843 bool java_lang_reflect_Method::has_annotation_default_field() { 2844 return (annotation_default_offset >= 0); 2845 } 2846 2847 oop java_lang_reflect_Method::annotation_default(oop method) { 2848 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2849 assert(has_annotation_default_field(), "annotation default field must be present"); 2850 return method->obj_field(annotation_default_offset); 2851 } 2852 2853 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 2854 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2855 assert(has_annotation_default_field(), "annotation default field must be present"); 2856 method->obj_field_put(annotation_default_offset, value); 2857 } 2858 2859 bool java_lang_reflect_Method::has_type_annotations_field() { 2860 return (type_annotations_offset >= 0); 2861 } 2862 2863 oop java_lang_reflect_Method::type_annotations(oop method) { 2864 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2865 assert(has_type_annotations_field(), "type_annotations field must be present"); 2866 return method->obj_field(type_annotations_offset); 2867 } 2868 2869 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) { 2870 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2871 assert(has_type_annotations_field(), "type_annotations field must be present"); 2872 method->obj_field_put(type_annotations_offset, value); 2873 } 2874 2875 #define CONSTRUCTOR_FIELDS_DO(macro) \ 2876 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 2877 macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 2878 macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 2879 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 2880 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 2881 macro##_OPTIONAL(signature_offset, k, vmSymbols::signature_name(), string_signature); \ 2882 macro##_OPTIONAL(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature); \ 2883 macro##_OPTIONAL(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature); \ 2884 macro##_OPTIONAL(type_annotations_offset, k, vmSymbols::type_annotations_name(), byte_array_signature) 2885 2886 2887 void java_lang_reflect_Constructor::compute_offsets() { 2888 InstanceKlass* k = SystemDictionary::reflect_Constructor_klass(); 2889 // The generic signature and annotations fields are only present in 1.5 2890 signature_offset = -1; 2891 annotations_offset = -1; 2892 parameter_annotations_offset = -1; 2893 type_annotations_offset = -1; 2894 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2895 } 2896 2897 #if INCLUDE_CDS 2898 void java_lang_reflect_Constructor::serialize(SerializeClosure* f) { 2899 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2900 } 2901 #endif 2902 2903 Handle java_lang_reflect_Constructor::create(TRAPS) { 2904 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2905 Symbol* name = vmSymbols::java_lang_reflect_Constructor(); 2906 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 2907 InstanceKlass* ik = InstanceKlass::cast(k); 2908 // Ensure it is initialized 2909 ik->initialize(CHECK_NH); 2910 return ik->allocate_instance_handle(THREAD); 2911 } 2912 2913 oop java_lang_reflect_Constructor::clazz(oop reflect) { 2914 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2915 return reflect->obj_field(clazz_offset); 2916 } 2917 2918 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 2919 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2920 reflect->obj_field_put(clazz_offset, value); 2921 } 2922 2923 oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 2924 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2925 return constructor->obj_field(parameterTypes_offset); 2926 } 2927 2928 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 2929 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2930 constructor->obj_field_put(parameterTypes_offset, value); 2931 } 2932 2933 oop java_lang_reflect_Constructor::exception_types(oop constructor) { 2934 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2935 return constructor->obj_field(exceptionTypes_offset); 2936 } 2937 2938 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 2939 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2940 constructor->obj_field_put(exceptionTypes_offset, value); 2941 } 2942 2943 int java_lang_reflect_Constructor::slot(oop reflect) { 2944 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2945 return reflect->int_field(slot_offset); 2946 } 2947 2948 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 2949 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2950 reflect->int_field_put(slot_offset, value); 2951 } 2952 2953 int java_lang_reflect_Constructor::modifiers(oop constructor) { 2954 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2955 return constructor->int_field(modifiers_offset); 2956 } 2957 2958 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 2959 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2960 constructor->int_field_put(modifiers_offset, value); 2961 } 2962 2963 bool java_lang_reflect_Constructor::has_signature_field() { 2964 return (signature_offset >= 0); 2965 } 2966 2967 oop java_lang_reflect_Constructor::signature(oop constructor) { 2968 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2969 assert(has_signature_field(), "signature field must be present"); 2970 return constructor->obj_field(signature_offset); 2971 } 2972 2973 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 2974 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2975 assert(has_signature_field(), "signature field must be present"); 2976 constructor->obj_field_put(signature_offset, value); 2977 } 2978 2979 bool java_lang_reflect_Constructor::has_annotations_field() { 2980 return (annotations_offset >= 0); 2981 } 2982 2983 oop java_lang_reflect_Constructor::annotations(oop constructor) { 2984 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2985 assert(has_annotations_field(), "annotations field must be present"); 2986 return constructor->obj_field(annotations_offset); 2987 } 2988 2989 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 2990 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 2991 assert(has_annotations_field(), "annotations field must be present"); 2992 constructor->obj_field_put(annotations_offset, value); 2993 } 2994 2995 bool java_lang_reflect_Constructor::has_parameter_annotations_field() { 2996 return (parameter_annotations_offset >= 0); 2997 } 2998 2999 oop java_lang_reflect_Constructor::parameter_annotations(oop method) { 3000 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3001 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 3002 return method->obj_field(parameter_annotations_offset); 3003 } 3004 3005 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 3006 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3007 assert(has_parameter_annotations_field(), "parameter annotations field must be present"); 3008 method->obj_field_put(parameter_annotations_offset, value); 3009 } 3010 3011 bool java_lang_reflect_Constructor::has_type_annotations_field() { 3012 return (type_annotations_offset >= 0); 3013 } 3014 3015 oop java_lang_reflect_Constructor::type_annotations(oop constructor) { 3016 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3017 assert(has_type_annotations_field(), "type_annotations field must be present"); 3018 return constructor->obj_field(type_annotations_offset); 3019 } 3020 3021 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) { 3022 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3023 assert(has_type_annotations_field(), "type_annotations field must be present"); 3024 constructor->obj_field_put(type_annotations_offset, value); 3025 } 3026 3027 #define FIELD_FIELDS_DO(macro) \ 3028 macro(clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3029 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3030 macro(type_offset, k, vmSymbols::type_name(), class_signature, false); \ 3031 macro(slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 3032 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3033 macro##_OPTIONAL(signature_offset, k, vmSymbols::signature_name(), string_signature); \ 3034 macro##_OPTIONAL(annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature); \ 3035 macro##_OPTIONAL(type_annotations_offset, k, vmSymbols::type_annotations_name(), byte_array_signature) 3036 3037 void java_lang_reflect_Field::compute_offsets() { 3038 InstanceKlass* k = SystemDictionary::reflect_Field_klass(); 3039 // The generic signature and annotations fields are only present in 1.5 3040 signature_offset = -1; 3041 annotations_offset = -1; 3042 type_annotations_offset = -1; 3043 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3044 } 3045 3046 #if INCLUDE_CDS 3047 void java_lang_reflect_Field::serialize(SerializeClosure* f) { 3048 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3049 } 3050 #endif 3051 3052 Handle java_lang_reflect_Field::create(TRAPS) { 3053 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3054 Symbol* name = vmSymbols::java_lang_reflect_Field(); 3055 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3056 InstanceKlass* ik = InstanceKlass::cast(k); 3057 // Ensure it is initialized 3058 ik->initialize(CHECK_NH); 3059 return ik->allocate_instance_handle(THREAD); 3060 } 3061 3062 oop java_lang_reflect_Field::clazz(oop reflect) { 3063 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3064 return reflect->obj_field(clazz_offset); 3065 } 3066 3067 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 3068 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3069 reflect->obj_field_put(clazz_offset, value); 3070 } 3071 3072 oop java_lang_reflect_Field::name(oop field) { 3073 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3074 return field->obj_field(name_offset); 3075 } 3076 3077 void java_lang_reflect_Field::set_name(oop field, oop value) { 3078 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3079 field->obj_field_put(name_offset, value); 3080 } 3081 3082 oop java_lang_reflect_Field::type(oop field) { 3083 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3084 return field->obj_field(type_offset); 3085 } 3086 3087 void java_lang_reflect_Field::set_type(oop field, oop value) { 3088 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3089 field->obj_field_put(type_offset, value); 3090 } 3091 3092 int java_lang_reflect_Field::slot(oop reflect) { 3093 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3094 return reflect->int_field(slot_offset); 3095 } 3096 3097 void java_lang_reflect_Field::set_slot(oop reflect, int value) { 3098 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3099 reflect->int_field_put(slot_offset, value); 3100 } 3101 3102 int java_lang_reflect_Field::modifiers(oop field) { 3103 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3104 return field->int_field(modifiers_offset); 3105 } 3106 3107 void java_lang_reflect_Field::set_modifiers(oop field, int value) { 3108 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3109 field->int_field_put(modifiers_offset, value); 3110 } 3111 3112 bool java_lang_reflect_Field::has_signature_field() { 3113 return (signature_offset >= 0); 3114 } 3115 3116 oop java_lang_reflect_Field::signature(oop field) { 3117 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3118 assert(has_signature_field(), "signature field must be present"); 3119 return field->obj_field(signature_offset); 3120 } 3121 3122 void java_lang_reflect_Field::set_signature(oop field, oop value) { 3123 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3124 assert(has_signature_field(), "signature field must be present"); 3125 field->obj_field_put(signature_offset, value); 3126 } 3127 3128 bool java_lang_reflect_Field::has_annotations_field() { 3129 return (annotations_offset >= 0); 3130 } 3131 3132 oop java_lang_reflect_Field::annotations(oop field) { 3133 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3134 assert(has_annotations_field(), "annotations field must be present"); 3135 return field->obj_field(annotations_offset); 3136 } 3137 3138 void java_lang_reflect_Field::set_annotations(oop field, oop value) { 3139 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3140 assert(has_annotations_field(), "annotations field must be present"); 3141 field->obj_field_put(annotations_offset, value); 3142 } 3143 3144 bool java_lang_reflect_Field::has_type_annotations_field() { 3145 return (type_annotations_offset >= 0); 3146 } 3147 3148 oop java_lang_reflect_Field::type_annotations(oop field) { 3149 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3150 assert(has_type_annotations_field(), "type_annotations field must be present"); 3151 return field->obj_field(type_annotations_offset); 3152 } 3153 3154 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) { 3155 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3156 assert(has_type_annotations_field(), "type_annotations field must be present"); 3157 field->obj_field_put(type_annotations_offset, value); 3158 } 3159 3160 #define CONSTANTPOOL_FIELDS_DO(macro) \ 3161 macro(_oop_offset, k, "constantPoolOop", object_signature, false) 3162 3163 void reflect_ConstantPool::compute_offsets() { 3164 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass(); 3165 // The field is called ConstantPool* in the sun.reflect.ConstantPool class. 3166 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3167 } 3168 3169 #if INCLUDE_CDS 3170 void reflect_ConstantPool::serialize(SerializeClosure* f) { 3171 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3172 } 3173 #endif 3174 3175 #define PARAMETER_FIELDS_DO(macro) \ 3176 macro(name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3177 macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3178 macro(index_offset, k, vmSymbols::index_name(), int_signature, false); \ 3179 macro(executable_offset, k, vmSymbols::executable_name(), executable_signature, false) 3180 3181 void java_lang_reflect_Parameter::compute_offsets() { 3182 InstanceKlass* k = SystemDictionary::reflect_Parameter_klass(); 3183 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3184 } 3185 3186 #if INCLUDE_CDS 3187 void java_lang_reflect_Parameter::serialize(SerializeClosure* f) { 3188 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3189 } 3190 #endif 3191 3192 Handle java_lang_reflect_Parameter::create(TRAPS) { 3193 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3194 Symbol* name = vmSymbols::java_lang_reflect_Parameter(); 3195 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3196 InstanceKlass* ik = InstanceKlass::cast(k); 3197 // Ensure it is initialized 3198 ik->initialize(CHECK_NH); 3199 return ik->allocate_instance_handle(THREAD); 3200 } 3201 3202 oop java_lang_reflect_Parameter::name(oop param) { 3203 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3204 return param->obj_field(name_offset); 3205 } 3206 3207 void java_lang_reflect_Parameter::set_name(oop param, oop value) { 3208 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3209 param->obj_field_put(name_offset, value); 3210 } 3211 3212 int java_lang_reflect_Parameter::modifiers(oop param) { 3213 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3214 return param->int_field(modifiers_offset); 3215 } 3216 3217 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) { 3218 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3219 param->int_field_put(modifiers_offset, value); 3220 } 3221 3222 int java_lang_reflect_Parameter::index(oop param) { 3223 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3224 return param->int_field(index_offset); 3225 } 3226 3227 void java_lang_reflect_Parameter::set_index(oop param, int value) { 3228 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3229 param->int_field_put(index_offset, value); 3230 } 3231 3232 oop java_lang_reflect_Parameter::executable(oop param) { 3233 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3234 return param->obj_field(executable_offset); 3235 } 3236 3237 void java_lang_reflect_Parameter::set_executable(oop param, oop value) { 3238 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3239 param->obj_field_put(executable_offset, value); 3240 } 3241 3242 3243 int java_lang_Module::loader_offset; 3244 int java_lang_Module::name_offset; 3245 int java_lang_Module::_module_entry_offset = -1; 3246 3247 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) { 3248 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3249 3250 Symbol* name = vmSymbols::java_lang_Module(); 3251 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3252 InstanceKlass* ik = InstanceKlass::cast(k); 3253 Handle jlmh = ik->allocate_instance_handle(CHECK_NH); 3254 JavaValue result(T_VOID); 3255 JavaCalls::call_special(&result, jlmh, ik, 3256 vmSymbols::object_initializer_name(), 3257 vmSymbols::java_lang_module_init_signature(), 3258 loader, module_name, CHECK_NH); 3259 return jlmh; 3260 } 3261 3262 #define MODULE_FIELDS_DO(macro) \ 3263 macro(loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \ 3264 macro(name_offset, k, vmSymbols::name_name(), string_signature, false) 3265 3266 void java_lang_Module::compute_offsets() { 3267 InstanceKlass* k = SystemDictionary::Module_klass(); 3268 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3269 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3270 } 3271 3272 #if INCLUDE_CDS 3273 void java_lang_Module::serialize(SerializeClosure* f) { 3274 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3275 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3276 } 3277 #endif 3278 3279 oop java_lang_Module::loader(oop module) { 3280 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3281 return module->obj_field(loader_offset); 3282 } 3283 3284 void java_lang_Module::set_loader(oop module, oop value) { 3285 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3286 module->obj_field_put(loader_offset, value); 3287 } 3288 3289 oop java_lang_Module::name(oop module) { 3290 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3291 return module->obj_field(name_offset); 3292 } 3293 3294 void java_lang_Module::set_name(oop module, oop value) { 3295 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3296 module->obj_field_put(name_offset, value); 3297 } 3298 3299 ModuleEntry* java_lang_Module::module_entry(oop module) { 3300 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset"); 3301 assert(module != NULL, "module can't be null"); 3302 assert(oopDesc::is_oop(module), "module must be oop"); 3303 3304 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset); 3305 if (module_entry == NULL) { 3306 // If the inject field containing the ModuleEntry* is null then return the 3307 // class loader's unnamed module. 3308 oop loader = java_lang_Module::loader(module); 3309 Handle h_loader = Handle(Thread::current(), loader); 3310 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader); 3311 return loader_cld->unnamed_module(); 3312 } 3313 return module_entry; 3314 } 3315 3316 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) { 3317 assert(_module_entry_offset != -1, "Uninitialized module_entry_offset"); 3318 assert(module != NULL, "module can't be null"); 3319 assert(oopDesc::is_oop(module), "module must be oop"); 3320 module->address_field_put(_module_entry_offset, (address)module_entry); 3321 } 3322 3323 Handle reflect_ConstantPool::create(TRAPS) { 3324 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3325 InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass(); 3326 // Ensure it is initialized 3327 k->initialize(CHECK_NH); 3328 return k->allocate_instance_handle(THREAD); 3329 } 3330 3331 3332 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) { 3333 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3334 oop mirror = value->pool_holder()->java_mirror(); 3335 // Save the mirror to get back the constant pool. 3336 reflect->obj_field_put(_oop_offset, mirror); 3337 } 3338 3339 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) { 3340 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3341 3342 oop mirror = reflect->obj_field(_oop_offset); 3343 Klass* k = java_lang_Class::as_Klass(mirror); 3344 assert(k->is_instance_klass(), "Must be"); 3345 3346 // Get the constant pool back from the klass. Since class redefinition 3347 // merges the new constant pool into the old, this is essentially the 3348 // same constant pool as the original. If constant pool merging is 3349 // no longer done in the future, this will have to change to save 3350 // the original. 3351 return InstanceKlass::cast(k)->constants(); 3352 } 3353 3354 #define UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(macro) \ 3355 macro(_base_offset, k, "base", object_signature, false) 3356 3357 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() { 3358 InstanceKlass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass(); 3359 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3360 } 3361 3362 #if INCLUDE_CDS 3363 void reflect_UnsafeStaticFieldAccessorImpl::serialize(SerializeClosure* f) { 3364 UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3365 } 3366 #endif 3367 3368 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 3369 Klass* k = SystemDictionary::box_klass(type); 3370 if (k == NULL) return NULL; 3371 InstanceKlass* ik = InstanceKlass::cast(k); 3372 if (!ik->is_initialized()) ik->initialize(CHECK_0); 3373 return ik->allocate_instance(THREAD); 3374 } 3375 3376 3377 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 3378 oop box = initialize_and_allocate(type, CHECK_0); 3379 if (box == NULL) return NULL; 3380 switch (type) { 3381 case T_BOOLEAN: 3382 box->bool_field_put(value_offset, value->z); 3383 break; 3384 case T_CHAR: 3385 box->char_field_put(value_offset, value->c); 3386 break; 3387 case T_FLOAT: 3388 box->float_field_put(value_offset, value->f); 3389 break; 3390 case T_DOUBLE: 3391 box->double_field_put(long_value_offset, value->d); 3392 break; 3393 case T_BYTE: 3394 box->byte_field_put(value_offset, value->b); 3395 break; 3396 case T_SHORT: 3397 box->short_field_put(value_offset, value->s); 3398 break; 3399 case T_INT: 3400 box->int_field_put(value_offset, value->i); 3401 break; 3402 case T_LONG: 3403 box->long_field_put(long_value_offset, value->j); 3404 break; 3405 default: 3406 return NULL; 3407 } 3408 return box; 3409 } 3410 3411 3412 BasicType java_lang_boxing_object::basic_type(oop box) { 3413 if (box == NULL) return T_ILLEGAL; 3414 BasicType type = SystemDictionary::box_klass_type(box->klass()); 3415 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 3416 return T_ILLEGAL; 3417 return type; 3418 } 3419 3420 3421 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 3422 BasicType type = SystemDictionary::box_klass_type(box->klass()); 3423 switch (type) { 3424 case T_BOOLEAN: 3425 value->z = box->bool_field(value_offset); 3426 break; 3427 case T_CHAR: 3428 value->c = box->char_field(value_offset); 3429 break; 3430 case T_FLOAT: 3431 value->f = box->float_field(value_offset); 3432 break; 3433 case T_DOUBLE: 3434 value->d = box->double_field(long_value_offset); 3435 break; 3436 case T_BYTE: 3437 value->b = box->byte_field(value_offset); 3438 break; 3439 case T_SHORT: 3440 value->s = box->short_field(value_offset); 3441 break; 3442 case T_INT: 3443 value->i = box->int_field(value_offset); 3444 break; 3445 case T_LONG: 3446 value->j = box->long_field(long_value_offset); 3447 break; 3448 default: 3449 return T_ILLEGAL; 3450 } // end switch 3451 return type; 3452 } 3453 3454 3455 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 3456 BasicType type = SystemDictionary::box_klass_type(box->klass()); 3457 switch (type) { 3458 case T_BOOLEAN: 3459 box->bool_field_put(value_offset, value->z); 3460 break; 3461 case T_CHAR: 3462 box->char_field_put(value_offset, value->c); 3463 break; 3464 case T_FLOAT: 3465 box->float_field_put(value_offset, value->f); 3466 break; 3467 case T_DOUBLE: 3468 box->double_field_put(long_value_offset, value->d); 3469 break; 3470 case T_BYTE: 3471 box->byte_field_put(value_offset, value->b); 3472 break; 3473 case T_SHORT: 3474 box->short_field_put(value_offset, value->s); 3475 break; 3476 case T_INT: 3477 box->int_field_put(value_offset, value->i); 3478 break; 3479 case T_LONG: 3480 box->long_field_put(long_value_offset, value->j); 3481 break; 3482 default: 3483 return T_ILLEGAL; 3484 } // end switch 3485 return type; 3486 } 3487 3488 3489 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) { 3490 switch (type) { 3491 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break; 3492 case T_CHAR: st->print("%d", value->c); break; 3493 case T_BYTE: st->print("%d", value->b); break; 3494 case T_SHORT: st->print("%d", value->s); break; 3495 case T_INT: st->print("%d", value->i); break; 3496 case T_LONG: st->print(JLONG_FORMAT, value->j); break; 3497 case T_FLOAT: st->print("%f", value->f); break; 3498 case T_DOUBLE: st->print("%lf", value->d); break; 3499 default: st->print("type %d?", type); break; 3500 } 3501 } 3502 3503 // Support for java_lang_ref_Reference 3504 3505 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) { 3506 assert(!oopDesc::is_null(obj), "sanity"); 3507 if (offset != java_lang_ref_Reference::referent_offset) { 3508 return false; 3509 } 3510 3511 Klass* k = obj->klass(); 3512 if (!k->is_instance_klass()) { 3513 return false; 3514 } 3515 3516 InstanceKlass* ik = InstanceKlass::cast(obj->klass()); 3517 bool is_reference = ik->reference_type() != REF_NONE; 3518 assert(!is_reference || ik->is_subclass_of(SystemDictionary::Reference_klass()), "sanity"); 3519 return is_reference; 3520 } 3521 3522 // Support for java_lang_ref_SoftReference 3523 // 3524 3525 #define SOFTREFERENCE_FIELDS_DO(macro) \ 3526 macro(timestamp_offset, k, "timestamp", long_signature, false); \ 3527 macro(static_clock_offset, k, "clock", long_signature, true) 3528 3529 void java_lang_ref_SoftReference::compute_offsets() { 3530 InstanceKlass* k = SystemDictionary::SoftReference_klass(); 3531 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3532 } 3533 3534 #if INCLUDE_CDS 3535 void java_lang_ref_SoftReference::serialize(SerializeClosure* f) { 3536 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3537 } 3538 #endif 3539 3540 jlong java_lang_ref_SoftReference::timestamp(oop ref) { 3541 return ref->long_field(timestamp_offset); 3542 } 3543 3544 jlong java_lang_ref_SoftReference::clock() { 3545 InstanceKlass* ik = SystemDictionary::SoftReference_klass(); 3546 oop base = ik->static_field_base(); 3547 return base->long_field(static_clock_offset); 3548 } 3549 3550 void java_lang_ref_SoftReference::set_clock(jlong value) { 3551 InstanceKlass* ik = SystemDictionary::SoftReference_klass(); 3552 oop base = ik->static_field_base(); 3553 base->long_field_put(static_clock_offset, value); 3554 } 3555 3556 // Support for java_lang_invoke_DirectMethodHandle 3557 3558 int java_lang_invoke_DirectMethodHandle::_member_offset; 3559 3560 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) { 3561 oop member_name = NULL; 3562 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh), 3563 "a DirectMethodHandle oop is expected"); 3564 return dmh->obj_field(member_offset_in_bytes()); 3565 } 3566 3567 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \ 3568 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false) 3569 3570 void java_lang_invoke_DirectMethodHandle::compute_offsets() { 3571 InstanceKlass* k = SystemDictionary::DirectMethodHandle_klass(); 3572 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3573 } 3574 3575 #if INCLUDE_CDS 3576 void java_lang_invoke_DirectMethodHandle::serialize(SerializeClosure* f) { 3577 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3578 } 3579 #endif 3580 3581 // Support for java_lang_invoke_MethodHandle 3582 3583 int java_lang_invoke_MethodHandle::_type_offset; 3584 int java_lang_invoke_MethodHandle::_form_offset; 3585 3586 int java_lang_invoke_MemberName::_clazz_offset; 3587 int java_lang_invoke_MemberName::_name_offset; 3588 int java_lang_invoke_MemberName::_type_offset; 3589 int java_lang_invoke_MemberName::_flags_offset; 3590 int java_lang_invoke_MemberName::_method_offset; 3591 int java_lang_invoke_MemberName::_vmindex_offset; 3592 3593 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset; 3594 int java_lang_invoke_ResolvedMethodName::_vmholder_offset; 3595 3596 int java_lang_invoke_LambdaForm::_vmentry_offset; 3597 3598 #define METHODHANDLE_FIELDS_DO(macro) \ 3599 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \ 3600 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false) 3601 3602 void java_lang_invoke_MethodHandle::compute_offsets() { 3603 InstanceKlass* k = SystemDictionary::MethodHandle_klass(); 3604 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3605 } 3606 3607 #if INCLUDE_CDS 3608 void java_lang_invoke_MethodHandle::serialize(SerializeClosure* f) { 3609 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3610 } 3611 #endif 3612 3613 #define MEMBERNAME_FIELDS_DO(macro) \ 3614 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3615 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3616 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \ 3617 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \ 3618 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false) 3619 3620 void java_lang_invoke_MemberName::compute_offsets() { 3621 InstanceKlass* k = SystemDictionary::MemberName_klass(); 3622 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3623 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3624 } 3625 3626 #if INCLUDE_CDS 3627 void java_lang_invoke_MemberName::serialize(SerializeClosure* f) { 3628 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3629 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3630 } 3631 #endif 3632 3633 void java_lang_invoke_ResolvedMethodName::compute_offsets() { 3634 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass(); 3635 assert(k != NULL, "jdk mismatch"); 3636 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3637 } 3638 3639 #if INCLUDE_CDS 3640 void java_lang_invoke_ResolvedMethodName::serialize(SerializeClosure* f) { 3641 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3642 } 3643 #endif 3644 3645 #define LAMBDAFORM_FIELDS_DO(macro) \ 3646 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false) 3647 3648 void java_lang_invoke_LambdaForm::compute_offsets() { 3649 InstanceKlass* k = SystemDictionary::LambdaForm_klass(); 3650 assert (k != NULL, "jdk mismatch"); 3651 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3652 } 3653 3654 #if INCLUDE_CDS 3655 void java_lang_invoke_LambdaForm::serialize(SerializeClosure* f) { 3656 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3657 } 3658 #endif 3659 3660 bool java_lang_invoke_LambdaForm::is_instance(oop obj) { 3661 return obj != NULL && is_subclass(obj->klass()); 3662 } 3663 3664 3665 oop java_lang_invoke_MethodHandle::type(oop mh) { 3666 return mh->obj_field(_type_offset); 3667 } 3668 3669 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) { 3670 mh->obj_field_put(_type_offset, mtype); 3671 } 3672 3673 oop java_lang_invoke_MethodHandle::form(oop mh) { 3674 assert(_form_offset != 0, ""); 3675 return mh->obj_field(_form_offset); 3676 } 3677 3678 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) { 3679 assert(_form_offset != 0, ""); 3680 mh->obj_field_put(_form_offset, lform); 3681 } 3682 3683 /// MemberName accessors 3684 3685 oop java_lang_invoke_MemberName::clazz(oop mname) { 3686 assert(is_instance(mname), "wrong type"); 3687 return mname->obj_field(_clazz_offset); 3688 } 3689 3690 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) { 3691 assert(is_instance(mname), "wrong type"); 3692 mname->obj_field_put(_clazz_offset, clazz); 3693 } 3694 3695 oop java_lang_invoke_MemberName::name(oop mname) { 3696 assert(is_instance(mname), "wrong type"); 3697 return mname->obj_field(_name_offset); 3698 } 3699 3700 void java_lang_invoke_MemberName::set_name(oop mname, oop name) { 3701 assert(is_instance(mname), "wrong type"); 3702 mname->obj_field_put(_name_offset, name); 3703 } 3704 3705 oop java_lang_invoke_MemberName::type(oop mname) { 3706 assert(is_instance(mname), "wrong type"); 3707 return mname->obj_field(_type_offset); 3708 } 3709 3710 void java_lang_invoke_MemberName::set_type(oop mname, oop type) { 3711 assert(is_instance(mname), "wrong type"); 3712 mname->obj_field_put(_type_offset, type); 3713 } 3714 3715 int java_lang_invoke_MemberName::flags(oop mname) { 3716 assert(is_instance(mname), "wrong type"); 3717 return mname->int_field(_flags_offset); 3718 } 3719 3720 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) { 3721 assert(is_instance(mname), "wrong type"); 3722 mname->int_field_put(_flags_offset, flags); 3723 } 3724 3725 3726 // Return vmtarget from ResolvedMethodName method field through indirection 3727 Method* java_lang_invoke_MemberName::vmtarget(oop mname) { 3728 assert(is_instance(mname), "wrong type"); 3729 oop method = mname->obj_field(_method_offset); 3730 return method == NULL ? NULL : java_lang_invoke_ResolvedMethodName::vmtarget(method); 3731 } 3732 3733 bool java_lang_invoke_MemberName::is_method(oop mname) { 3734 assert(is_instance(mname), "must be MemberName"); 3735 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0; 3736 } 3737 3738 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) { 3739 assert(is_instance(mname), "wrong type"); 3740 mname->obj_field_put(_method_offset, resolved_method); 3741 } 3742 3743 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) { 3744 assert(is_instance(mname), "wrong type"); 3745 return (intptr_t) mname->address_field(_vmindex_offset); 3746 } 3747 3748 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) { 3749 assert(is_instance(mname), "wrong type"); 3750 mname->address_field_put(_vmindex_offset, (address) index); 3751 } 3752 3753 3754 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) { 3755 assert(is_instance(resolved_method), "wrong type"); 3756 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset); 3757 assert(m->is_method(), "must be"); 3758 return m; 3759 } 3760 3761 // Used by redefinition to change Method* to new Method* with same hash (name, signature) 3762 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) { 3763 assert(is_instance(resolved_method), "wrong type"); 3764 resolved_method->address_field_put(_vmtarget_offset, (address)m); 3765 } 3766 3767 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) { 3768 // lookup ResolvedMethod oop in the table, or create a new one and intern it 3769 oop resolved_method = ResolvedMethodTable::find_method(m()); 3770 if (resolved_method == NULL) { 3771 InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass(); 3772 if (!k->is_initialized()) { 3773 k->initialize(CHECK_NULL); 3774 } 3775 oop new_resolved_method = k->allocate_instance(CHECK_NULL); 3776 new_resolved_method->address_field_put(_vmtarget_offset, (address)m()); 3777 // Add a reference to the loader (actually mirror because anonymous classes will not have 3778 // distinct loaders) to ensure the metadata is kept alive. 3779 // This mirror may be different than the one in clazz field. 3780 new_resolved_method->obj_field_put(_vmholder_offset, m->method_holder()->java_mirror()); 3781 resolved_method = ResolvedMethodTable::add_method(Handle(THREAD, new_resolved_method)); 3782 } 3783 return resolved_method; 3784 } 3785 3786 oop java_lang_invoke_LambdaForm::vmentry(oop lform) { 3787 assert(is_instance(lform), "wrong type"); 3788 return lform->obj_field(_vmentry_offset); 3789 } 3790 3791 3792 // Support for java_lang_invoke_MethodType 3793 3794 int java_lang_invoke_MethodType::_rtype_offset; 3795 int java_lang_invoke_MethodType::_ptypes_offset; 3796 3797 #define METHODTYPE_FIELDS_DO(macro) \ 3798 macro(_rtype_offset, k, "rtype", class_signature, false); \ 3799 macro(_ptypes_offset, k, "ptypes", class_array_signature, false) 3800 3801 void java_lang_invoke_MethodType::compute_offsets() { 3802 InstanceKlass* k = SystemDictionary::MethodType_klass(); 3803 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3804 } 3805 3806 #if INCLUDE_CDS 3807 void java_lang_invoke_MethodType::serialize(SerializeClosure* f) { 3808 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3809 } 3810 #endif 3811 3812 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) { 3813 st->print("("); 3814 objArrayOop pts = ptypes(mt); 3815 for (int i = 0, limit = pts->length(); i < limit; i++) { 3816 java_lang_Class::print_signature(pts->obj_at(i), st); 3817 } 3818 st->print(")"); 3819 java_lang_Class::print_signature(rtype(mt), st); 3820 } 3821 3822 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) { 3823 ResourceMark rm; 3824 stringStream buffer(128); 3825 print_signature(mt, &buffer); 3826 const char* sigstr = buffer.base(); 3827 int siglen = (int) buffer.size(); 3828 Symbol *name; 3829 if (!intern_if_not_found) { 3830 name = SymbolTable::probe(sigstr, siglen); 3831 } else { 3832 name = SymbolTable::new_symbol(sigstr, siglen, THREAD); 3833 } 3834 return name; 3835 } 3836 3837 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) { 3838 if (mt1 == mt2) 3839 return true; 3840 if (rtype(mt1) != rtype(mt2)) 3841 return false; 3842 if (ptype_count(mt1) != ptype_count(mt2)) 3843 return false; 3844 for (int i = ptype_count(mt1) - 1; i >= 0; i--) { 3845 if (ptype(mt1, i) != ptype(mt2, i)) 3846 return false; 3847 } 3848 return true; 3849 } 3850 3851 oop java_lang_invoke_MethodType::rtype(oop mt) { 3852 assert(is_instance(mt), "must be a MethodType"); 3853 return mt->obj_field(_rtype_offset); 3854 } 3855 3856 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) { 3857 assert(is_instance(mt), "must be a MethodType"); 3858 return (objArrayOop) mt->obj_field(_ptypes_offset); 3859 } 3860 3861 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) { 3862 return ptypes(mt)->obj_at(idx); 3863 } 3864 3865 int java_lang_invoke_MethodType::ptype_count(oop mt) { 3866 return ptypes(mt)->length(); 3867 } 3868 3869 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) { 3870 objArrayOop pts = ptypes(mt); 3871 int count = pts->length(); 3872 int slots = 0; 3873 for (int i = 0; i < count; i++) { 3874 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i)); 3875 slots += type2size[bt]; 3876 } 3877 return slots; 3878 } 3879 3880 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) { 3881 BasicType bt = java_lang_Class::as_BasicType(rtype(mt)); 3882 return type2size[bt]; 3883 } 3884 3885 3886 // Support for java_lang_invoke_CallSite 3887 3888 int java_lang_invoke_CallSite::_target_offset; 3889 int java_lang_invoke_CallSite::_context_offset; 3890 3891 #define CALLSITE_FIELDS_DO(macro) \ 3892 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \ 3893 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false) 3894 3895 void java_lang_invoke_CallSite::compute_offsets() { 3896 InstanceKlass* k = SystemDictionary::CallSite_klass(); 3897 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3898 } 3899 3900 #if INCLUDE_CDS 3901 void java_lang_invoke_CallSite::serialize(SerializeClosure* f) { 3902 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3903 } 3904 #endif 3905 3906 oop java_lang_invoke_CallSite::context(oop call_site) { 3907 assert(java_lang_invoke_CallSite::is_instance(call_site), ""); 3908 3909 oop dep_oop = call_site->obj_field(_context_offset); 3910 return dep_oop; 3911 } 3912 3913 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext 3914 3915 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset; 3916 3917 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() { 3918 InstanceKlass* k = SystemDictionary::Context_klass(); 3919 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3920 } 3921 3922 #if INCLUDE_CDS 3923 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize(SerializeClosure* f) { 3924 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3925 } 3926 #endif 3927 3928 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) { 3929 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), ""); 3930 intptr_t* vmdeps_addr = (intptr_t*)call_site->field_addr(_vmdependencies_offset); 3931 DependencyContext dep_ctx(vmdeps_addr); 3932 return dep_ctx; 3933 } 3934 3935 // Support for java_security_AccessControlContext 3936 3937 int java_security_AccessControlContext::_context_offset = 0; 3938 int java_security_AccessControlContext::_privilegedContext_offset = 0; 3939 int java_security_AccessControlContext::_isPrivileged_offset = 0; 3940 int java_security_AccessControlContext::_isAuthorized_offset = -1; 3941 3942 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \ 3943 macro(_context_offset, k, "context", protectiondomain_signature, false); \ 3944 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \ 3945 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \ 3946 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false) 3947 3948 void java_security_AccessControlContext::compute_offsets() { 3949 assert(_isPrivileged_offset == 0, "offsets should be initialized only once"); 3950 InstanceKlass* k = SystemDictionary::AccessControlContext_klass(); 3951 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3952 } 3953 3954 #if INCLUDE_CDS 3955 void java_security_AccessControlContext::serialize(SerializeClosure* f) { 3956 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3957 } 3958 #endif 3959 3960 bool java_security_AccessControlContext::is_authorized(Handle context) { 3961 assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type"); 3962 assert(_isAuthorized_offset != -1, "should be set"); 3963 return context->bool_field(_isAuthorized_offset) != 0; 3964 } 3965 3966 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) { 3967 assert(_isPrivileged_offset != 0, "offsets should have been initialized"); 3968 // Ensure klass is initialized 3969 SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0); 3970 // Allocate result 3971 oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0); 3972 // Fill in values 3973 result->obj_field_put(_context_offset, context()); 3974 result->obj_field_put(_privilegedContext_offset, privileged_context()); 3975 result->bool_field_put(_isPrivileged_offset, isPrivileged); 3976 // whitelist AccessControlContexts created by the JVM if present 3977 if (_isAuthorized_offset != -1) { 3978 result->bool_field_put(_isAuthorized_offset, true); 3979 } 3980 return result; 3981 } 3982 3983 3984 // Support for java_lang_ClassLoader 3985 3986 bool java_lang_ClassLoader::offsets_computed = false; 3987 int java_lang_ClassLoader::_loader_data_offset = -1; 3988 int java_lang_ClassLoader::parallelCapable_offset = -1; 3989 int java_lang_ClassLoader::name_offset = -1; 3990 int java_lang_ClassLoader::unnamedModule_offset = -1; 3991 3992 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) { 3993 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop"); 3994 return HeapAccess<>::load_at(loader, _loader_data_offset); 3995 } 3996 3997 ClassLoaderData* java_lang_ClassLoader::cmpxchg_loader_data(ClassLoaderData* new_data, oop loader, ClassLoaderData* expected_data) { 3998 assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop"); 3999 return HeapAccess<>::atomic_cmpxchg_at(new_data, loader, _loader_data_offset, expected_data); 4000 } 4001 4002 #define CLASSLOADER_FIELDS_DO(macro) \ 4003 macro(parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \ 4004 macro(name_offset, k1, vmSymbols::name_name(), string_signature, false); \ 4005 macro(unnamedModule_offset, k1, "unnamedModule", module_signature, false); \ 4006 macro(parent_offset, k1, "parent", classloader_signature, false) 4007 4008 void java_lang_ClassLoader::compute_offsets() { 4009 assert(!offsets_computed, "offsets should be initialized only once"); 4010 offsets_computed = true; 4011 4012 InstanceKlass* k1 = SystemDictionary::ClassLoader_klass(); 4013 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4014 4015 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4016 } 4017 4018 #if INCLUDE_CDS 4019 void java_lang_ClassLoader::serialize(SerializeClosure* f) { 4020 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4021 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4022 } 4023 #endif 4024 4025 oop java_lang_ClassLoader::parent(oop loader) { 4026 assert(is_instance(loader), "loader must be oop"); 4027 return loader->obj_field(parent_offset); 4028 } 4029 4030 oop java_lang_ClassLoader::name(oop loader) { 4031 assert(is_instance(loader), "loader must be oop"); 4032 return loader->obj_field(name_offset); 4033 } 4034 4035 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) { 4036 assert(is_instance(loader), "loader must be oop"); 4037 assert(cl == NULL || is_instance(cl), "cl argument must be oop"); 4038 oop acl = loader; 4039 debug_only(jint loop_count = 0); 4040 // This loop taken verbatim from ClassLoader.java: 4041 do { 4042 acl = parent(acl); 4043 if (cl == acl) { 4044 return true; 4045 } 4046 assert(++loop_count > 0, "loop_count overflow"); 4047 } while (acl != NULL); 4048 return false; 4049 } 4050 4051 bool java_lang_ClassLoader::is_instance(oop obj) { 4052 return obj != NULL && is_subclass(obj->klass()); 4053 } 4054 4055 4056 // For class loader classes, parallelCapable defined 4057 // based on non-null field 4058 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it 4059 bool java_lang_ClassLoader::parallelCapable(oop class_loader) { 4060 if (parallelCapable_offset == -1) { 4061 // Default for backward compatibility is false 4062 return false; 4063 } 4064 return (class_loader->obj_field(parallelCapable_offset) != NULL); 4065 } 4066 4067 bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 4068 // Fix for 4474172; see evaluation for more details 4069 loader = non_reflection_class_loader(loader); 4070 4071 oop cl = SystemDictionary::java_system_loader(); 4072 while(cl != NULL) { 4073 if (cl == loader) return true; 4074 cl = parent(cl); 4075 } 4076 return false; 4077 } 4078 4079 // Return true if this is one of the class loaders associated with 4080 // the generated bytecodes for reflection. 4081 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) { 4082 if (loader != NULL) { 4083 Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass(); 4084 // This might be null in non-1.4 JDKs 4085 return (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)); 4086 } 4087 return false; 4088 } 4089 4090 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) { 4091 // See whether this is one of the class loaders associated with 4092 // the generated bytecodes for reflection, and if so, "magically" 4093 // delegate to its parent to prevent class loading from occurring 4094 // in places where applications using reflection didn't expect it. 4095 if (is_reflection_class_loader(loader)) { 4096 return parent(loader); 4097 } 4098 return loader; 4099 } 4100 4101 oop java_lang_ClassLoader::unnamedModule(oop loader) { 4102 assert(is_instance(loader), "loader must be oop"); 4103 return loader->obj_field(unnamedModule_offset); 4104 } 4105 4106 // Support for java_lang_System 4107 // 4108 #define SYSTEM_FIELDS_DO(macro) \ 4109 macro(static_in_offset, k, "in", input_stream_signature, true); \ 4110 macro(static_out_offset, k, "out", print_stream_signature, true); \ 4111 macro(static_err_offset, k, "err", print_stream_signature, true); \ 4112 macro(static_security_offset, k, "security", security_manager_signature, true) 4113 4114 void java_lang_System::compute_offsets() { 4115 InstanceKlass* k = SystemDictionary::System_klass(); 4116 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4117 } 4118 4119 #if INCLUDE_CDS 4120 void java_lang_System::serialize(SerializeClosure* f) { 4121 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4122 } 4123 #endif 4124 4125 int java_lang_System::in_offset_in_bytes() { return static_in_offset; } 4126 int java_lang_System::out_offset_in_bytes() { return static_out_offset; } 4127 int java_lang_System::err_offset_in_bytes() { return static_err_offset; } 4128 4129 4130 bool java_lang_System::has_security_manager() { 4131 InstanceKlass* ik = SystemDictionary::System_klass(); 4132 oop base = ik->static_field_base(); 4133 return !oopDesc::is_null(base->obj_field(static_security_offset)); 4134 } 4135 4136 int java_lang_Class::_klass_offset; 4137 int java_lang_Class::_array_klass_offset; 4138 int java_lang_Class::_oop_size_offset; 4139 int java_lang_Class::_static_oop_field_count_offset; 4140 int java_lang_Class::_class_loader_offset; 4141 int java_lang_Class::_module_offset; 4142 int java_lang_Class::_protection_domain_offset; 4143 int java_lang_Class::_component_mirror_offset; 4144 int java_lang_Class::_init_lock_offset; 4145 int java_lang_Class::_signers_offset; 4146 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL; 4147 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL; 4148 int java_lang_Throwable::backtrace_offset; 4149 int java_lang_Throwable::detailMessage_offset; 4150 int java_lang_Throwable::stackTrace_offset; 4151 int java_lang_Throwable::depth_offset; 4152 int java_lang_Throwable::static_unassigned_stacktrace_offset; 4153 int java_lang_reflect_AccessibleObject::override_offset; 4154 int java_lang_reflect_Method::clazz_offset; 4155 int java_lang_reflect_Method::name_offset; 4156 int java_lang_reflect_Method::returnType_offset; 4157 int java_lang_reflect_Method::parameterTypes_offset; 4158 int java_lang_reflect_Method::exceptionTypes_offset; 4159 int java_lang_reflect_Method::slot_offset; 4160 int java_lang_reflect_Method::modifiers_offset; 4161 int java_lang_reflect_Method::signature_offset; 4162 int java_lang_reflect_Method::annotations_offset; 4163 int java_lang_reflect_Method::parameter_annotations_offset; 4164 int java_lang_reflect_Method::annotation_default_offset; 4165 int java_lang_reflect_Method::type_annotations_offset; 4166 int java_lang_reflect_Constructor::clazz_offset; 4167 int java_lang_reflect_Constructor::parameterTypes_offset; 4168 int java_lang_reflect_Constructor::exceptionTypes_offset; 4169 int java_lang_reflect_Constructor::slot_offset; 4170 int java_lang_reflect_Constructor::modifiers_offset; 4171 int java_lang_reflect_Constructor::signature_offset; 4172 int java_lang_reflect_Constructor::annotations_offset; 4173 int java_lang_reflect_Constructor::parameter_annotations_offset; 4174 int java_lang_reflect_Constructor::type_annotations_offset; 4175 int java_lang_reflect_Field::clazz_offset; 4176 int java_lang_reflect_Field::name_offset; 4177 int java_lang_reflect_Field::type_offset; 4178 int java_lang_reflect_Field::slot_offset; 4179 int java_lang_reflect_Field::modifiers_offset; 4180 int java_lang_reflect_Field::signature_offset; 4181 int java_lang_reflect_Field::annotations_offset; 4182 int java_lang_reflect_Field::type_annotations_offset; 4183 int java_lang_reflect_Parameter::name_offset; 4184 int java_lang_reflect_Parameter::modifiers_offset; 4185 int java_lang_reflect_Parameter::index_offset; 4186 int java_lang_reflect_Parameter::executable_offset; 4187 int java_lang_boxing_object::value_offset; 4188 int java_lang_boxing_object::long_value_offset; 4189 int java_lang_ref_Reference::referent_offset; 4190 int java_lang_ref_Reference::queue_offset; 4191 int java_lang_ref_Reference::next_offset; 4192 int java_lang_ref_Reference::discovered_offset; 4193 int java_lang_ref_SoftReference::timestamp_offset; 4194 int java_lang_ref_SoftReference::static_clock_offset; 4195 int java_lang_ClassLoader::parent_offset; 4196 int java_lang_System::static_in_offset; 4197 int java_lang_System::static_out_offset; 4198 int java_lang_System::static_err_offset; 4199 int java_lang_System::static_security_offset; 4200 int java_lang_StackTraceElement::methodName_offset; 4201 int java_lang_StackTraceElement::fileName_offset; 4202 int java_lang_StackTraceElement::lineNumber_offset; 4203 int java_lang_StackTraceElement::moduleName_offset; 4204 int java_lang_StackTraceElement::moduleVersion_offset; 4205 int java_lang_StackTraceElement::classLoaderName_offset; 4206 int java_lang_StackTraceElement::declaringClass_offset; 4207 int java_lang_StackTraceElement::declaringClassObject_offset; 4208 int java_lang_StackFrameInfo::_memberName_offset; 4209 int java_lang_StackFrameInfo::_bci_offset; 4210 int java_lang_StackFrameInfo::_version_offset; 4211 int java_lang_LiveStackFrameInfo::_monitors_offset; 4212 int java_lang_LiveStackFrameInfo::_locals_offset; 4213 int java_lang_LiveStackFrameInfo::_operands_offset; 4214 int java_lang_LiveStackFrameInfo::_mode_offset; 4215 int java_lang_AssertionStatusDirectives::classes_offset; 4216 int java_lang_AssertionStatusDirectives::classEnabled_offset; 4217 int java_lang_AssertionStatusDirectives::packages_offset; 4218 int java_lang_AssertionStatusDirectives::packageEnabled_offset; 4219 int java_lang_AssertionStatusDirectives::deflt_offset; 4220 int java_nio_Buffer::_limit_offset; 4221 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0; 4222 int reflect_ConstantPool::_oop_offset; 4223 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset; 4224 4225 #define STACKTRACEELEMENT_FIELDS_DO(macro) \ 4226 macro(declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \ 4227 macro(classLoaderName_offset, k, "classLoaderName", string_signature, false); \ 4228 macro(moduleName_offset, k, "moduleName", string_signature, false); \ 4229 macro(moduleVersion_offset, k, "moduleVersion", string_signature, false); \ 4230 macro(declaringClass_offset, k, "declaringClass", string_signature, false); \ 4231 macro(methodName_offset, k, "methodName", string_signature, false); \ 4232 macro(fileName_offset, k, "fileName", string_signature, false); \ 4233 macro(lineNumber_offset, k, "lineNumber", int_signature, false) 4234 4235 // Support for java_lang_StackTraceElement 4236 void java_lang_StackTraceElement::compute_offsets() { 4237 InstanceKlass* k = SystemDictionary::StackTraceElement_klass(); 4238 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4239 } 4240 4241 #if INCLUDE_CDS 4242 void java_lang_StackTraceElement::serialize(SerializeClosure* f) { 4243 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4244 } 4245 #endif 4246 4247 void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 4248 element->obj_field_put(fileName_offset, value); 4249 } 4250 4251 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 4252 element->obj_field_put(declaringClass_offset, value); 4253 } 4254 4255 void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 4256 element->obj_field_put(methodName_offset, value); 4257 } 4258 4259 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 4260 element->int_field_put(lineNumber_offset, value); 4261 } 4262 4263 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) { 4264 element->obj_field_put(moduleName_offset, value); 4265 } 4266 4267 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) { 4268 element->obj_field_put(moduleVersion_offset, value); 4269 } 4270 4271 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) { 4272 element->obj_field_put(classLoaderName_offset, value); 4273 } 4274 4275 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) { 4276 element->obj_field_put(declaringClassObject_offset, value); 4277 } 4278 4279 void java_lang_StackFrameInfo::set_version(oop element, short value) { 4280 element->short_field_put(_version_offset, value); 4281 } 4282 4283 void java_lang_StackFrameInfo::set_bci(oop element, int value) { 4284 element->int_field_put(_bci_offset, value); 4285 } 4286 4287 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) { 4288 element->obj_field_put(_monitors_offset, value); 4289 } 4290 4291 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) { 4292 element->obj_field_put(_locals_offset, value); 4293 } 4294 4295 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) { 4296 element->obj_field_put(_operands_offset, value); 4297 } 4298 4299 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) { 4300 element->int_field_put(_mode_offset, value); 4301 } 4302 4303 // Support for java Assertions - java_lang_AssertionStatusDirectives. 4304 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \ 4305 macro(classes_offset, k, "classes", string_array_signature, false); \ 4306 macro(classEnabled_offset, k, "classEnabled", bool_array_signature, false); \ 4307 macro(packages_offset, k, "packages", string_array_signature, false); \ 4308 macro(packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \ 4309 macro(deflt_offset, k, "deflt", bool_signature, false) 4310 4311 void java_lang_AssertionStatusDirectives::compute_offsets() { 4312 InstanceKlass* k = SystemDictionary::AssertionStatusDirectives_klass(); 4313 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4314 } 4315 4316 #if INCLUDE_CDS 4317 void java_lang_AssertionStatusDirectives::serialize(SerializeClosure* f) { 4318 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4319 } 4320 #endif 4321 4322 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 4323 o->obj_field_put(classes_offset, val); 4324 } 4325 4326 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 4327 o->obj_field_put(classEnabled_offset, val); 4328 } 4329 4330 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 4331 o->obj_field_put(packages_offset, val); 4332 } 4333 4334 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 4335 o->obj_field_put(packageEnabled_offset, val); 4336 } 4337 4338 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 4339 o->bool_field_put(deflt_offset, val); 4340 } 4341 4342 4343 // Support for intrinsification of java.nio.Buffer.checkIndex 4344 int java_nio_Buffer::limit_offset() { 4345 return _limit_offset; 4346 } 4347 4348 #define BUFFER_FIELDS_DO(macro) \ 4349 macro(_limit_offset, k, "limit", int_signature, false) 4350 4351 void java_nio_Buffer::compute_offsets() { 4352 InstanceKlass* k = SystemDictionary::nio_Buffer_klass(); 4353 assert(k != NULL, "must be loaded in 1.4+"); 4354 BUFFER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4355 } 4356 4357 #if INCLUDE_CDS 4358 void java_nio_Buffer::serialize(SerializeClosure* f) { 4359 BUFFER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4360 } 4361 #endif 4362 4363 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) { 4364 if (_owner_offset != 0) return; 4365 4366 SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK); 4367 InstanceKlass* k = SystemDictionary::abstract_ownable_synchronizer_klass(); 4368 compute_offset(_owner_offset, k, 4369 "exclusiveOwnerThread", vmSymbols::thread_signature()); 4370 } 4371 4372 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 4373 assert(_owner_offset != 0, "Must be initialized"); 4374 return obj->obj_field(_owner_offset); 4375 } 4376 4377 static int member_offset(int hardcoded_offset) { 4378 return (hardcoded_offset * heapOopSize) + instanceOopDesc::base_offset_in_bytes(); 4379 } 4380 4381 // Compute hard-coded offsets 4382 // Invoked before SystemDictionary::initialize, so pre-loaded classes 4383 // are not available to determine the offset_of_static_fields. 4384 void JavaClasses::compute_hard_coded_offsets() { 4385 4386 // java_lang_boxing_object 4387 java_lang_boxing_object::value_offset = member_offset(java_lang_boxing_object::hc_value_offset); 4388 java_lang_boxing_object::long_value_offset = align_up(member_offset(java_lang_boxing_object::hc_value_offset), BytesPerLong); 4389 4390 // java_lang_ref_Reference 4391 java_lang_ref_Reference::referent_offset = member_offset(java_lang_ref_Reference::hc_referent_offset); 4392 java_lang_ref_Reference::queue_offset = member_offset(java_lang_ref_Reference::hc_queue_offset); 4393 java_lang_ref_Reference::next_offset = member_offset(java_lang_ref_Reference::hc_next_offset); 4394 java_lang_ref_Reference::discovered_offset = member_offset(java_lang_ref_Reference::hc_discovered_offset); 4395 } 4396 4397 4398 // Compute non-hard-coded field offsets of all the classes in this file 4399 void JavaClasses::compute_offsets() { 4400 if (UseSharedSpaces) { 4401 return; // field offsets are loaded from archive 4402 } 4403 4404 // java_lang_Class::compute_offsets was called earlier in bootstrap 4405 java_lang_System::compute_offsets(); 4406 java_lang_ClassLoader::compute_offsets(); 4407 java_lang_Throwable::compute_offsets(); 4408 java_lang_Thread::compute_offsets(); 4409 java_lang_ThreadGroup::compute_offsets(); 4410 java_lang_AssertionStatusDirectives::compute_offsets(); 4411 java_lang_ref_SoftReference::compute_offsets(); 4412 java_lang_invoke_MethodHandle::compute_offsets(); 4413 java_lang_invoke_DirectMethodHandle::compute_offsets(); 4414 java_lang_invoke_MemberName::compute_offsets(); 4415 java_lang_invoke_ResolvedMethodName::compute_offsets(); 4416 java_lang_invoke_LambdaForm::compute_offsets(); 4417 java_lang_invoke_MethodType::compute_offsets(); 4418 java_lang_invoke_CallSite::compute_offsets(); 4419 java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets(); 4420 java_security_AccessControlContext::compute_offsets(); 4421 // Initialize reflection classes. The layouts of these classes 4422 // changed with the new reflection implementation in JDK 1.4, and 4423 // since the Universe doesn't know what JDK version it is until this 4424 // point we defer computation of these offsets until now. 4425 java_lang_reflect_AccessibleObject::compute_offsets(); 4426 java_lang_reflect_Method::compute_offsets(); 4427 java_lang_reflect_Constructor::compute_offsets(); 4428 java_lang_reflect_Field::compute_offsets(); 4429 java_nio_Buffer::compute_offsets(); 4430 reflect_ConstantPool::compute_offsets(); 4431 reflect_UnsafeStaticFieldAccessorImpl::compute_offsets(); 4432 java_lang_reflect_Parameter::compute_offsets(); 4433 java_lang_Module::compute_offsets(); 4434 java_lang_StackTraceElement::compute_offsets(); 4435 java_lang_StackFrameInfo::compute_offsets(); 4436 java_lang_LiveStackFrameInfo::compute_offsets(); 4437 4438 // generated interpreter code wants to know about the offsets we just computed: 4439 AbstractAssembler::update_delayed_values(); 4440 } 4441 4442 #ifndef PRODUCT 4443 4444 // These functions exist to assert the validity of hard-coded field offsets to guard 4445 // against changes in the class files 4446 4447 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) { 4448 EXCEPTION_MARK; 4449 fieldDescriptor fd; 4450 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH); 4451 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 4452 InstanceKlass* ik = InstanceKlass::cast(k); 4453 TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH); 4454 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig, CATCH); 4455 if (!ik->find_local_field(f_name, f_sig, &fd)) { 4456 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 4457 return false; 4458 } 4459 if (fd.is_static()) { 4460 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 4461 return false; 4462 } 4463 if (fd.offset() == hardcoded_offset ) { 4464 return true; 4465 } else { 4466 tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.", 4467 klass_name, field_name, hardcoded_offset, fd.offset()); 4468 return false; 4469 } 4470 } 4471 4472 // Check the hard-coded field offsets of all the classes in this file 4473 4474 void JavaClasses::check_offsets() { 4475 bool valid = true; 4476 4477 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 4478 valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig) 4479 4480 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 4481 valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig) 4482 4483 // Boxed primitive objects (java_lang_boxing_object) 4484 4485 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 4486 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 4487 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 4488 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 4489 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 4490 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 4491 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 4492 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 4493 4494 // java.lang.ref.Reference 4495 4496 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;"); 4497 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;"); 4498 CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;"); 4499 // Fake field 4500 //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;"); 4501 4502 if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed"); 4503 } 4504 4505 #endif // PRODUCT 4506 4507 int InjectedField::compute_offset() { 4508 InstanceKlass* ik = InstanceKlass::cast(klass()); 4509 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 4510 if (!may_be_java && !fs.access_flags().is_internal()) { 4511 // Only look at injected fields 4512 continue; 4513 } 4514 if (fs.name() == name() && fs.signature() == signature()) { 4515 return fs.offset(); 4516 } 4517 } 4518 ResourceMark rm; 4519 tty->print_cr("Invalid layout of %s at %s/%s%s", ik->external_name(), name()->as_C_string(), signature()->as_C_string(), may_be_java ? " (may_be_java)" : ""); 4520 #ifndef PRODUCT 4521 ik->print(); 4522 tty->print_cr("all fields:"); 4523 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 4524 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 4525 } 4526 #endif //PRODUCT 4527 vm_exit_during_initialization("Invalid layout of preloaded class: use -Xlog:class+load=info to see the origin of the problem class"); 4528 return -1; 4529 } 4530 4531 void javaClasses_init() { 4532 JavaClasses::compute_offsets(); 4533 JavaClasses::check_offsets(); 4534 FilteredFieldsMap::initialize(); // must be done after computing offsets. 4535 }