1 /* 2 * Copyright (c) 1997, 2025, 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 "cds/aotReferenceObjSupport.hpp" 26 #include "cds/archiveBuilder.hpp" 27 #include "cds/archiveHeapLoader.hpp" 28 #include "cds/cdsConfig.hpp" 29 #include "cds/heapShared.hpp" 30 #include "cds/metaspaceShared.hpp" 31 #include "classfile/altHashing.hpp" 32 #include "classfile/classLoaderData.inline.hpp" 33 #include "classfile/javaClasses.inline.hpp" 34 #include "classfile/javaClassesImpl.hpp" 35 #include "classfile/javaThreadStatus.hpp" 36 #include "classfile/moduleEntry.hpp" 37 #include "classfile/stringTable.hpp" 38 #include "classfile/symbolTable.hpp" 39 #include "classfile/systemDictionary.hpp" 40 #include "classfile/vmClasses.hpp" 41 #include "classfile/vmSymbols.hpp" 42 #include "code/debugInfo.hpp" 43 #include "code/dependencyContext.hpp" 44 #include "code/pcDesc.hpp" 45 #include "gc/shared/collectedHeap.inline.hpp" 46 #include "interpreter/interpreter.hpp" 47 #include "interpreter/linkResolver.hpp" 48 #include "jvm.h" 49 #include "logging/log.hpp" 50 #include "logging/logStream.hpp" 51 #include "memory/oopFactory.hpp" 52 #include "memory/resourceArea.hpp" 53 #include "memory/universe.hpp" 54 #include "oops/fieldInfo.hpp" 55 #include "oops/fieldStreams.inline.hpp" 56 #include "oops/instanceKlass.inline.hpp" 57 #include "oops/instanceMirrorKlass.hpp" 58 #include "oops/klass.hpp" 59 #include "oops/klass.inline.hpp" 60 #include "oops/method.inline.hpp" 61 #include "oops/objArrayKlass.hpp" 62 #include "oops/objArrayOop.inline.hpp" 63 #include "oops/oopCast.inline.hpp" 64 #include "oops/oop.inline.hpp" 65 #include "oops/symbol.hpp" 66 #include "oops/recordComponent.hpp" 67 #include "oops/typeArrayOop.inline.hpp" 68 #include "prims/jvmtiExport.hpp" 69 #include "prims/methodHandles.hpp" 70 #include "prims/resolvedMethodTable.hpp" 71 #include "runtime/continuationEntry.inline.hpp" 72 #include "runtime/continuationJavaClasses.inline.hpp" 73 #include "runtime/fieldDescriptor.inline.hpp" 74 #include "runtime/frame.inline.hpp" 75 #include "runtime/handles.inline.hpp" 76 #include "runtime/handshake.hpp" 77 #include "runtime/init.hpp" 78 #include "runtime/interfaceSupport.inline.hpp" 79 #include "runtime/java.hpp" 80 #include "runtime/javaCalls.hpp" 81 #include "runtime/javaThread.hpp" 82 #include "runtime/jniHandles.inline.hpp" 83 #include "runtime/reflectionUtils.hpp" 84 #include "runtime/safepoint.hpp" 85 #include "runtime/safepointVerifiers.hpp" 86 #include "runtime/threadSMR.hpp" 87 #include "runtime/vframe.inline.hpp" 88 #include "runtime/vm_version.hpp" 89 #include "utilities/align.hpp" 90 #include "utilities/globalDefinitions.hpp" 91 #include "utilities/growableArray.hpp" 92 #include "utilities/preserveException.hpp" 93 #include "utilities/utf8.hpp" 94 #if INCLUDE_JVMCI 95 #include "jvmci/jvmciJavaClasses.hpp" 96 #endif 97 98 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \ 99 { VM_CLASS_ID(klass), VM_SYMBOL_ENUM_NAME(name##_name), VM_SYMBOL_ENUM_NAME(signature), may_be_java }, 100 101 InjectedField JavaClasses::_injected_fields[] = { 102 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD) 103 }; 104 105 // Register native methods of Object 106 void java_lang_Object::register_natives(TRAPS) { 107 InstanceKlass* obj = vmClasses::Object_klass(); 108 Method::register_native(obj, vmSymbols::hashCode_name(), 109 vmSymbols::void_int_signature(), (address) &JVM_IHashCode, CHECK); 110 Method::register_native(obj, vmSymbols::wait_name(), 111 vmSymbols::long_void_signature(), (address) &JVM_MonitorWait, CHECK); 112 Method::register_native(obj, vmSymbols::notify_name(), 113 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotify, CHECK); 114 Method::register_native(obj, vmSymbols::notifyAll_name(), 115 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotifyAll, CHECK); 116 Method::register_native(obj, vmSymbols::clone_name(), 117 vmSymbols::void_object_signature(), (address) &JVM_Clone, THREAD); 118 } 119 120 int JavaClasses::compute_injected_offset(InjectedFieldID id) { 121 return _injected_fields[(int)id].compute_offset(); 122 } 123 124 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) { 125 *field_count = 0; 126 127 vmSymbolID sid = vmSymbols::find_sid(class_name); 128 if (sid == vmSymbolID::NO_SID) { 129 // Only well known classes can inject fields 130 return nullptr; 131 } 132 133 int count = 0; 134 int start = -1; 135 136 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \ 137 if (sid == VM_SYMBOL_ENUM_NAME(klass)) { \ 138 count++; \ 139 if (start == -1) { \ 140 start = (int)InjectedFieldID::klass##_##name##_enum; \ 141 } \ 142 } 143 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD); 144 #undef LOOKUP_INJECTED_FIELD 145 146 if (start != -1) { 147 *field_count = count; 148 return _injected_fields + start; 149 } 150 return nullptr; 151 } 152 153 154 // Helpful routine for computing field offsets at run time rather than hardcoding them 155 // Finds local fields only, including static fields. Static field offsets are from the 156 // beginning of the mirror. 157 void JavaClasses::compute_offset(int &dest_offset, 158 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol, 159 bool is_static) { 160 fieldDescriptor fd; 161 if (ik == nullptr) { 162 ResourceMark rm; 163 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string()); 164 vm_exit_during_initialization("Invalid layout of well-known class"); 165 } 166 167 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) { 168 ResourceMark rm; 169 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(), 170 name_symbol->as_C_string(), signature_symbol->as_C_string()); 171 #ifndef PRODUCT 172 // Prints all fields and offsets 173 Log(class) lt; 174 LogStream ls(lt.error()); 175 ik->print_on(&ls); 176 #endif //PRODUCT 177 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class"); 178 } 179 dest_offset = fd.offset(); 180 } 181 182 // Overloading to pass name as a string. 183 void JavaClasses::compute_offset(int& dest_offset, InstanceKlass* ik, 184 const char* name_string, Symbol* signature_symbol, 185 bool is_static) { 186 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string)); 187 if (name == nullptr) { 188 ResourceMark rm; 189 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string); 190 vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name()); 191 } 192 compute_offset(dest_offset, ik, name, signature_symbol, is_static); 193 } 194 195 // java_lang_String 196 197 int java_lang_String::_value_offset; 198 int java_lang_String::_hash_offset; 199 int java_lang_String::_hashIsZero_offset; 200 int java_lang_String::_coder_offset; 201 int java_lang_String::_flags_offset; 202 203 bool java_lang_String::_initialized; 204 205 206 bool java_lang_String::test_and_set_flag(oop java_string, uint8_t flag_mask) { 207 uint8_t* addr = flags_addr(java_string); 208 uint8_t value = Atomic::load(addr); 209 while ((value & flag_mask) == 0) { 210 uint8_t old_value = value; 211 value |= flag_mask; 212 value = Atomic::cmpxchg(addr, old_value, value); 213 if (value == old_value) return false; // Flag bit changed from 0 to 1. 214 } 215 return true; // Flag bit is already 1. 216 } 217 218 #define STRING_FIELDS_DO(macro) \ 219 macro(_value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \ 220 macro(_hash_offset, k, "hash", int_signature, false); \ 221 macro(_hashIsZero_offset, k, "hashIsZero", bool_signature, false); \ 222 macro(_coder_offset, k, "coder", byte_signature, false); 223 224 void java_lang_String::compute_offsets() { 225 if (_initialized) { 226 return; 227 } 228 229 InstanceKlass* k = vmClasses::String_klass(); 230 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET); 231 STRING_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 232 233 _initialized = true; 234 } 235 236 #if INCLUDE_CDS 237 void java_lang_String::serialize_offsets(SerializeClosure* f) { 238 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 239 STRING_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 240 f->do_bool(&_initialized); 241 } 242 #endif 243 244 class CompactStringsFixup : public FieldClosure { 245 private: 246 bool _value; 247 248 public: 249 CompactStringsFixup(bool value) : _value(value) {} 250 251 void do_field(fieldDescriptor* fd) { 252 if (fd->name() == vmSymbols::compact_strings_name()) { 253 oop mirror = fd->field_holder()->java_mirror(); 254 assert(fd->field_holder() == vmClasses::String_klass(), "Should be String"); 255 assert(mirror != nullptr, "String must have mirror already"); 256 mirror->bool_field_put(fd->offset(), _value); 257 } 258 } 259 }; 260 261 void java_lang_String::set_compact_strings(bool value) { 262 CompactStringsFixup fix(value); 263 vmClasses::String_klass()->do_local_static_fields(&fix); 264 } 265 266 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) { 267 assert(_initialized, "Must be initialized"); 268 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings"); 269 270 // Create the String object first, so there's a chance that the String 271 // and the char array it points to end up in the same cache line. 272 oop obj; 273 obj = vmClasses::String_klass()->allocate_instance(CHECK_NH); 274 275 // Create the char array. The String object must be handlized here 276 // because GC can happen as a result of the allocation attempt. 277 Handle h_obj(THREAD, obj); 278 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16. 279 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);; 280 281 // Point the String at the char array 282 obj = h_obj(); 283 set_value(obj, buffer); 284 // No need to zero the offset, allocation zero'ed the entire String object 285 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16); 286 return h_obj; 287 } 288 289 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) { 290 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length); 291 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 292 typeArrayOop buffer = value(h_obj()); 293 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]"); 294 if (is_latin1) { 295 for (int index = 0; index < length; index++) { 296 buffer->byte_at_put(index, (jbyte)unicode[index]); 297 } 298 } else { 299 for (int index = 0; index < length; index++) { 300 buffer->char_at_put(index, unicode[index]); 301 } 302 } 303 304 #ifdef ASSERT 305 { 306 ResourceMark rm; 307 size_t utf8_len = static_cast<size_t>(length); 308 char* expected = UNICODE::as_utf8(unicode, utf8_len); 309 char* actual = as_utf8_string(h_obj()); 310 if (strcmp(expected, actual) != 0) { 311 fatal("Unicode conversion failure: %s --> %s", expected, actual); 312 } 313 } 314 #endif 315 316 return h_obj; 317 } 318 319 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) { 320 Handle h_obj = create_from_unicode(unicode, length, CHECK_NULL); 321 return h_obj(); 322 } 323 324 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) { 325 if (utf8_str == nullptr) { 326 return Handle(); 327 } 328 bool has_multibyte, is_latin1; 329 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte); 330 if (!CompactStrings) { 331 has_multibyte = true; 332 is_latin1 = false; 333 } 334 335 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 336 if (length > 0) { 337 if (!has_multibyte) { 338 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str); 339 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length); 340 } else if (is_latin1) { 341 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 342 } else { 343 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 344 } 345 } 346 347 #ifdef ASSERT 348 // This check is too strict when the input string is not a valid UTF8. 349 // For example, it may be created with arbitrary content via jni_NewStringUTF. 350 if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, strlen(utf8_str), /*version_leq_47*/false)) { 351 ResourceMark rm; 352 const char* expected = utf8_str; 353 char* actual = as_utf8_string(h_obj()); 354 if (strcmp(expected, actual) != 0) { 355 fatal("String conversion failure: %s --> %s", expected, actual); 356 } 357 } 358 #endif 359 360 return h_obj; 361 } 362 363 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) { 364 Handle h_obj = create_from_str(utf8_str, CHECK_NULL); 365 return h_obj(); 366 } 367 368 Handle java_lang_String::create_from_symbol(const Symbol* symbol, TRAPS) { 369 const char* utf8_str = (char*)symbol->bytes(); 370 int utf8_len = symbol->utf8_length(); 371 372 bool has_multibyte, is_latin1; 373 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte); 374 if (!CompactStrings) { 375 has_multibyte = true; 376 is_latin1 = false; 377 } 378 379 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 380 if (length > 0) { 381 if (!has_multibyte) { 382 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str); 383 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length); 384 } else if (is_latin1) { 385 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 386 } else { 387 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 388 } 389 } 390 391 #ifdef ASSERT 392 // This check is too strict on older classfile versions 393 if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, utf8_len, /*version_leq_47*/false)) 394 { 395 ResourceMark rm; 396 const char* expected = symbol->as_utf8(); 397 char* actual = as_utf8_string(h_obj()); 398 if (strncmp(expected, actual, utf8_len) != 0) { 399 fatal("Symbol conversion failure: %s --> %s", expected, actual); 400 } 401 } 402 #endif 403 404 return h_obj; 405 } 406 407 // Converts a C string to a Java String based on current encoding 408 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) { 409 assert(str != nullptr, "bad arguments"); 410 411 typedef jstring (JNICALL *to_java_string_fn_t)(JNIEnv*, const char *); 412 static to_java_string_fn_t _to_java_string_fn = nullptr; 413 414 if (_to_java_string_fn == nullptr) { 415 void *lib_handle = os::native_java_library(); 416 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "JNU_NewStringPlatform")); 417 if (_to_java_string_fn == nullptr) { 418 fatal("JNU_NewStringPlatform missing"); 419 } 420 } 421 422 jstring js = nullptr; 423 { 424 JavaThread* thread = THREAD; 425 HandleMark hm(thread); 426 ThreadToNativeFromVM ttn(thread); 427 js = (_to_java_string_fn)(thread->jni_environment(), str); 428 } 429 430 Handle native_platform_string(THREAD, JNIHandles::resolve(js)); 431 JNIHandles::destroy_local(js); // destroy local JNIHandle. 432 return native_platform_string; 433 } 434 435 // Converts a Java String to a native C string that can be used for 436 // native OS calls. 437 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) { 438 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*); 439 static to_platform_string_fn_t _to_platform_string_fn = nullptr; 440 441 if (_to_platform_string_fn == nullptr) { 442 void *lib_handle = os::native_java_library(); 443 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars")); 444 if (_to_platform_string_fn == nullptr) { 445 fatal("GetStringPlatformChars missing"); 446 } 447 } 448 449 char *native_platform_string; 450 jstring js; 451 { JavaThread* thread = THREAD; 452 js = (jstring) JNIHandles::make_local(thread, java_string()); 453 HandleMark hm(thread); 454 ThreadToNativeFromVM ttn(thread); 455 JNIEnv *env = thread->jni_environment(); 456 bool is_copy; 457 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy); 458 assert(is_copy == JNI_TRUE, "is_copy value changed"); 459 } 460 461 // Uses a store barrier and therefore needs to be in vm state 462 JNIHandles::destroy_local(js); 463 464 return native_platform_string; 465 } 466 467 Handle java_lang_String::externalize_classname(Symbol* java_name, TRAPS) { 468 ResourceMark rm(THREAD); 469 return create_from_str(java_name->as_klass_external_name(), THREAD); 470 } 471 472 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) { 473 jchar* result = as_unicode_string_or_null(java_string, length); 474 if (result == nullptr) { 475 THROW_MSG_NULL(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string"); 476 } 477 return result; 478 } 479 480 jchar* java_lang_String::as_unicode_string_or_null(oop java_string, int& length) { 481 typeArrayOop value = java_lang_String::value(java_string); 482 length = java_lang_String::length(java_string, value); 483 bool is_latin1 = java_lang_String::is_latin1(java_string); 484 485 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length); 486 if (result != nullptr) { 487 if (!is_latin1) { 488 for (int index = 0; index < length; index++) { 489 result[index] = value->char_at(index); 490 } 491 } else { 492 for (int index = 0; index < length; index++) { 493 result[index] = ((jchar) value->byte_at(index)) & 0xff; 494 } 495 } 496 } 497 return result; 498 } 499 500 inline unsigned int java_lang_String::hash_code_impl(oop java_string, bool update) { 501 // The hash and hashIsZero fields are subject to a benign data race, 502 // making it crucial to ensure that any observable result of the 503 // calculation in this method stays correct under any possible read of 504 // these fields. Necessary restrictions to allow this to be correct 505 // without explicit memory fences or similar concurrency primitives is 506 // that we can ever only write to one of these two fields for a given 507 // String instance, and that the computation is idempotent and derived 508 // from immutable state 509 assert(_initialized && (_hash_offset > 0) && (_hashIsZero_offset > 0), "Must be initialized"); 510 if (java_lang_String::hash_is_set(java_string)) { 511 return java_string->int_field(_hash_offset); 512 } 513 514 typeArrayOop value = java_lang_String::value(java_string); 515 int length = java_lang_String::length(java_string, value); 516 bool is_latin1 = java_lang_String::is_latin1(java_string); 517 518 unsigned int hash = 0; 519 if (length > 0) { 520 if (is_latin1) { 521 hash = java_lang_String::hash_code(value->byte_at_addr(0), length); 522 } else { 523 hash = java_lang_String::hash_code(value->char_at_addr(0), length); 524 } 525 } 526 527 if (update) { 528 if (hash != 0) { 529 java_string->int_field_put(_hash_offset, hash); 530 } else { 531 java_string->bool_field_put(_hashIsZero_offset, true); 532 } 533 } 534 return hash; 535 } 536 537 unsigned int java_lang_String::hash_code(oop java_string) { 538 return hash_code_impl(java_string, /*update=*/true); 539 } 540 541 unsigned int java_lang_String::hash_code_noupdate(oop java_string) { 542 return hash_code_impl(java_string, /*update=*/false); 543 } 544 545 546 char* java_lang_String::as_quoted_ascii(oop java_string) { 547 typeArrayOop value = java_lang_String::value(java_string); 548 int length = java_lang_String::length(java_string, value); 549 bool is_latin1 = java_lang_String::is_latin1(java_string); 550 551 if (length == 0) return nullptr; 552 553 char* result; 554 size_t result_length; 555 if (!is_latin1) { 556 jchar* base = value->char_at_addr(0); 557 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 558 result = NEW_RESOURCE_ARRAY(char, result_length); 559 UNICODE::as_quoted_ascii(base, length, result, result_length); 560 } else { 561 jbyte* base = value->byte_at_addr(0); 562 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 563 result = NEW_RESOURCE_ARRAY(char, result_length); 564 UNICODE::as_quoted_ascii(base, length, result, result_length); 565 } 566 assert(result_length >= (size_t)length + 1, "must not be shorter"); 567 assert(result_length == strlen(result) + 1, "must match"); 568 return result; 569 } 570 571 Symbol* java_lang_String::as_symbol(oop java_string) { 572 typeArrayOop value = java_lang_String::value(java_string); 573 int length = java_lang_String::length(java_string, value); 574 bool is_latin1 = java_lang_String::is_latin1(java_string); 575 if (!is_latin1) { 576 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0); 577 Symbol* sym = SymbolTable::new_symbol(base, length); 578 return sym; 579 } else { 580 ResourceMark rm; 581 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0); 582 size_t utf8_len = static_cast<size_t>(length); 583 const char* base = UNICODE::as_utf8(position, utf8_len); 584 Symbol* sym = SymbolTable::new_symbol(base, checked_cast<int>(utf8_len)); 585 return sym; 586 } 587 } 588 589 Symbol* java_lang_String::as_symbol_or_null(oop java_string) { 590 typeArrayOop value = java_lang_String::value(java_string); 591 int length = java_lang_String::length(java_string, value); 592 bool is_latin1 = java_lang_String::is_latin1(java_string); 593 if (!is_latin1) { 594 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0); 595 return SymbolTable::probe_unicode(base, length); 596 } else { 597 ResourceMark rm; 598 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0); 599 size_t utf8_len = static_cast<size_t>(length); 600 const char* base = UNICODE::as_utf8(position, utf8_len); 601 return SymbolTable::probe(base, checked_cast<int>(utf8_len)); 602 } 603 } 604 605 size_t java_lang_String::utf8_length(oop java_string, typeArrayOop value) { 606 assert(value_equals(value, java_lang_String::value(java_string)), 607 "value must be same as java_lang_String::value(java_string)"); 608 int length = java_lang_String::length(java_string, value); 609 if (length == 0) { 610 return 0; 611 } 612 if (!java_lang_String::is_latin1(java_string)) { 613 return UNICODE::utf8_length(value->char_at_addr(0), length); 614 } else { 615 return UNICODE::utf8_length(value->byte_at_addr(0), length); 616 } 617 } 618 619 size_t java_lang_String::utf8_length(oop java_string) { 620 typeArrayOop value = java_lang_String::value(java_string); 621 return utf8_length(java_string, value); 622 } 623 624 int java_lang_String::utf8_length_as_int(oop java_string) { 625 typeArrayOop value = java_lang_String::value(java_string); 626 return utf8_length_as_int(java_string, value); 627 } 628 629 int java_lang_String::utf8_length_as_int(oop java_string, typeArrayOop value) { 630 assert(value_equals(value, java_lang_String::value(java_string)), 631 "value must be same as java_lang_String::value(java_string)"); 632 int length = java_lang_String::length(java_string, value); 633 if (length == 0) { 634 return 0; 635 } 636 if (!java_lang_String::is_latin1(java_string)) { 637 return UNICODE::utf8_length_as_int(value->char_at_addr(0), length); 638 } else { 639 return UNICODE::utf8_length_as_int(value->byte_at_addr(0), length); 640 } 641 } 642 643 char* java_lang_String::as_utf8_string(oop java_string) { 644 size_t length; 645 return as_utf8_string(java_string, length); 646 } 647 648 char* java_lang_String::as_utf8_string(oop java_string, size_t& length) { 649 typeArrayOop value = java_lang_String::value(java_string); 650 // `length` is used as the incoming number of characters to 651 // convert, and then set as the number of bytes in the UTF8 sequence. 652 length = java_lang_String::length(java_string, value); 653 bool is_latin1 = java_lang_String::is_latin1(java_string); 654 if (!is_latin1) { 655 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0); 656 return UNICODE::as_utf8(position, length); 657 } else { 658 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0); 659 return UNICODE::as_utf8(position, length); 660 } 661 } 662 663 // Uses a provided buffer if it's sufficiently large, otherwise allocates 664 // a resource array to fit 665 char* java_lang_String::as_utf8_string_full(oop java_string, char* buf, size_t buflen, size_t& utf8_len) { 666 typeArrayOop value = java_lang_String::value(java_string); 667 int len = java_lang_String::length(java_string, value); 668 bool is_latin1 = java_lang_String::is_latin1(java_string); 669 if (!is_latin1) { 670 jchar *position = (len == 0) ? nullptr : value->char_at_addr(0); 671 utf8_len = UNICODE::utf8_length(position, len); 672 if (utf8_len >= buflen) { 673 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1); 674 } 675 return UNICODE::as_utf8(position, len, buf, utf8_len + 1); 676 } else { 677 jbyte *position = (len == 0) ? nullptr : value->byte_at_addr(0); 678 utf8_len = UNICODE::utf8_length(position, len); 679 if (utf8_len >= buflen) { 680 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1); 681 } 682 return UNICODE::as_utf8(position, len, buf, utf8_len + 1); 683 } 684 } 685 686 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, size_t buflen) { 687 assert(value_equals(value, java_lang_String::value(java_string)), 688 "value must be same as java_lang_String::value(java_string)"); 689 int length = java_lang_String::length(java_string, value); 690 bool is_latin1 = java_lang_String::is_latin1(java_string); 691 if (!is_latin1) { 692 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0); 693 return UNICODE::as_utf8(position, length, buf, buflen); 694 } else { 695 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0); 696 return UNICODE::as_utf8(position, length, buf, buflen); 697 } 698 } 699 700 char* java_lang_String::as_utf8_string(oop java_string, char* buf, size_t buflen) { 701 typeArrayOop value = java_lang_String::value(java_string); 702 return as_utf8_string(java_string, value, buf, buflen); 703 } 704 705 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) { 706 // `length` is used as the incoming number of characters to 707 // convert, and then set as the number of bytes in the UTF8 sequence. 708 size_t length = static_cast<size_t>(len); 709 typeArrayOop value = java_lang_String::value(java_string); 710 bool is_latin1 = java_lang_String::is_latin1(java_string); 711 assert(start + len <= java_lang_String::length(java_string), "just checking"); 712 if (!is_latin1) { 713 jchar* position = value->char_at_addr(start); 714 return UNICODE::as_utf8(position, length); 715 } else { 716 jbyte* position = value->byte_at_addr(start); 717 return UNICODE::as_utf8(position, length); 718 } 719 } 720 721 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, size_t buflen) { 722 assert(value_equals(value, java_lang_String::value(java_string)), 723 "value must be same as java_lang_String::value(java_string)"); 724 assert(start + len <= java_lang_String::length(java_string), "just checking"); 725 bool is_latin1 = java_lang_String::is_latin1(java_string); 726 if (!is_latin1) { 727 jchar* position = value->char_at_addr(start); 728 return UNICODE::as_utf8(position, len, buf, buflen); 729 } else { 730 jbyte* position = value->byte_at_addr(start); 731 return UNICODE::as_utf8(position, len, buf, buflen); 732 } 733 } 734 735 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) { 736 assert(java_string->klass() == vmClasses::String_klass(), 737 "must be java_string"); 738 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 739 int length = java_lang_String::length(java_string, value); 740 if (length != len) { 741 return false; 742 } 743 bool is_latin1 = java_lang_String::is_latin1(java_string); 744 if (!is_latin1) { 745 for (int i = 0; i < len; i++) { 746 if (value->char_at(i) != chars[i]) { 747 return false; 748 } 749 } 750 } else { 751 for (int i = 0; i < len; i++) { 752 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) { 753 return false; 754 } 755 } 756 } 757 return true; 758 } 759 760 bool java_lang_String::equals(oop java_string, const char* utf8_string, size_t utf8_len) { 761 assert(java_string->klass() == vmClasses::String_klass(), 762 "must be java_string"); 763 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 764 int length = java_lang_String::length(java_string, value); 765 int unicode_length = UTF8::unicode_length(utf8_string, utf8_len); 766 if (length != unicode_length) { 767 return false; 768 } 769 bool is_latin1 = java_lang_String::is_latin1(java_string); 770 jchar c; 771 if (!is_latin1) { 772 for (int i = 0; i < unicode_length; i++) { 773 utf8_string = UTF8::next(utf8_string, &c); 774 if (value->char_at(i) != c) { 775 return false; 776 } 777 } 778 } else { 779 for (int i = 0; i < unicode_length; i++) { 780 utf8_string = UTF8::next(utf8_string, &c); 781 if ((((jchar) value->byte_at(i)) & 0xff) != c) { 782 return false; 783 } 784 } 785 } 786 return true; 787 } 788 789 bool java_lang_String::equals(oop str1, oop str2) { 790 assert(str1->klass() == vmClasses::String_klass(), 791 "must be java String"); 792 assert(str2->klass() == vmClasses::String_klass(), 793 "must be java String"); 794 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1); 795 bool is_latin1 = java_lang_String::is_latin1(str1); 796 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2); 797 bool is_latin2 = java_lang_String::is_latin1(str2); 798 799 if (is_latin1 != is_latin2) { 800 // Strings with different coders are never equal. 801 return false; 802 } 803 return value_equals(value1, value2); 804 } 805 806 // Print the given string to the given outputStream, limiting the output to 807 // at most max_length of the string's characters. If the length exceeds the 808 // limit we print an abridged version of the string with the "middle" elided 809 // and replaced by " ... (N characters ommitted) ... ". If max_length is odd 810 // it is treated as max_length-1. 811 void java_lang_String::print(oop java_string, outputStream* st, int max_length) { 812 assert(java_string->klass() == vmClasses::String_klass(), "must be java_string"); 813 // We need at least two characters to print A ... B 814 assert(max_length > 1, "invalid max_length: %d", max_length); 815 816 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 817 818 if (value == nullptr) { 819 // This can happen if, e.g., printing a String 820 // object before its initializer has been called 821 st->print("nullptr"); 822 return; 823 } 824 825 int length = java_lang_String::length(java_string, value); 826 bool is_latin1 = java_lang_String::is_latin1(java_string); 827 828 bool abridge = length > max_length; 829 830 st->print("\""); 831 for (int index = 0; index < length; index++) { 832 // If we need to abridge and we've printed half the allowed characters 833 // then jump to the tail of the string. 834 if (abridge && index >= max_length / 2) { 835 st->print(" ... (%d characters ommitted) ... ", length - 2 * (max_length / 2)); 836 index = length - (max_length / 2); 837 abridge = false; // only do this once 838 } 839 jchar c = (!is_latin1) ? value->char_at(index) : 840 ((jchar) value->byte_at(index)) & 0xff; 841 if (c < ' ') { 842 st->print("\\x%02X", c); // print control characters e.g. \x0A 843 } else { 844 st->print("%c", c); 845 } 846 } 847 st->print("\""); 848 849 if (length > max_length) { 850 st->print(" (abridged) "); 851 } 852 } 853 854 // java_lang_Class 855 856 int java_lang_Class::_klass_offset; 857 int java_lang_Class::_array_klass_offset; 858 int java_lang_Class::_oop_size_offset; 859 int java_lang_Class::_static_oop_field_count_offset; 860 int java_lang_Class::_class_loader_offset; 861 int java_lang_Class::_module_offset; 862 int java_lang_Class::_protection_domain_offset; 863 int java_lang_Class::_component_mirror_offset; 864 int java_lang_Class::_init_lock_offset; 865 int java_lang_Class::_signers_offset; 866 int java_lang_Class::_name_offset; 867 int java_lang_Class::_source_file_offset; 868 int java_lang_Class::_classData_offset; 869 int java_lang_Class::_classRedefinedCount_offset; 870 int java_lang_Class::_reflectionData_offset; 871 int java_lang_Class::_modifiers_offset; 872 int java_lang_Class::_is_primitive_offset; 873 874 bool java_lang_Class::_offsets_computed = false; 875 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = nullptr; 876 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = nullptr; 877 878 #ifdef ASSERT 879 inline static void assert_valid_static_string_field(fieldDescriptor* fd) { 880 assert(fd->has_initial_value(), "caller should have checked this"); 881 assert(fd->field_type() == T_OBJECT, "caller should have checked this"); 882 assert(fd->signature() == vmSymbols::string_signature(), "just checking"); 883 } 884 #endif 885 886 static void initialize_static_string_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 887 DEBUG_ONLY(assert_valid_static_string_field(fd);) 888 oop string = fd->string_initial_value(CHECK); 889 mirror()->obj_field_put(fd->offset(), string); 890 } 891 892 static void initialize_static_primitive_field(fieldDescriptor* fd, Handle mirror) { 893 assert(fd->has_initial_value(), "caller should have checked this"); 894 BasicType t = fd->field_type(); 895 switch (t) { 896 case T_BYTE: 897 mirror()->byte_field_put(fd->offset(), (jbyte)(fd->int_initial_value())); 898 break; 899 case T_BOOLEAN: 900 mirror()->bool_field_put(fd->offset(), (jboolean)(fd->int_initial_value())); 901 break; 902 case T_CHAR: 903 mirror()->char_field_put(fd->offset(), (jchar)(fd->int_initial_value())); 904 break; 905 case T_SHORT: 906 mirror()->short_field_put(fd->offset(), (jshort)(fd->int_initial_value())); 907 break; 908 case T_INT: 909 mirror()->int_field_put(fd->offset(), fd->int_initial_value()); 910 break; 911 case T_FLOAT: 912 mirror()->float_field_put(fd->offset(), fd->float_initial_value()); 913 break; 914 case T_DOUBLE: 915 mirror()->double_field_put(fd->offset(), fd->double_initial_value()); 916 break; 917 case T_LONG: 918 mirror()->long_field_put(fd->offset(), fd->long_initial_value()); 919 break; 920 default: 921 // Illegal ConstantValue attribute in class file should have been 922 // caught during classfile parsing. 923 ShouldNotReachHere(); 924 } 925 } 926 927 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 928 assert(mirror.not_null() && fd->is_static(), "just checking"); 929 if (fd->has_initial_value()) { 930 if (fd->field_type() != T_OBJECT) { 931 initialize_static_primitive_field(fd, mirror); 932 } else { 933 initialize_static_string_field(fd, mirror, CHECK); 934 } 935 } 936 } 937 938 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) { 939 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already"); 940 941 // If the offset was read from the shared archive, it was fixed up already 942 if (!k->is_shared()) { 943 if (k->is_instance_klass()) { 944 // During bootstrap, java.lang.Class wasn't loaded so static field 945 // offsets were computed without the size added it. Go back and 946 // update all the static field offsets to included the size. 947 948 // Unfortunately, the FieldInfo stream is encoded with UNSIGNED5 which doesn't allow 949 // content updates. So the FieldInfo stream has to be decompressed into a temporary array, 950 // static fields offsets are updated in this array before reencoding everything into 951 // a new UNSIGNED5 stream, and substitute it to the old FieldInfo stream. 952 953 int java_fields; 954 int injected_fields; 955 InstanceKlass* ik = InstanceKlass::cast(k); 956 GrowableArray<FieldInfo>* fields = 957 FieldInfoStream::create_FieldInfoArray(ik->fieldinfo_stream(), 958 &java_fields, &injected_fields); 959 for (int i = 0; i < fields->length(); i++) { 960 FieldInfo* fi = fields->adr_at(i); 961 if (fi->access_flags().is_static()) { 962 fi->set_offset(fi->offset() + InstanceMirrorKlass::offset_of_static_fields()); 963 } 964 } 965 Array<u1>* old_stream = ik->fieldinfo_stream(); 966 assert(fields->length() == (java_fields + injected_fields), "Must be"); 967 Array<u1>* new_fis = FieldInfoStream::create_FieldInfoStream(fields, java_fields, injected_fields, k->class_loader_data(), CHECK); 968 ik->set_fieldinfo_stream(new_fis); 969 MetadataFactory::free_array<u1>(k->class_loader_data(), old_stream); 970 } 971 } 972 973 if (k->is_shared() && k->has_archived_mirror_index()) { 974 if (ArchiveHeapLoader::is_in_use()) { 975 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK); 976 assert(present, "Missing archived mirror for %s", k->external_name()); 977 return; 978 } else { 979 k->clear_java_mirror_handle(); 980 k->clear_archived_mirror_index(); 981 } 982 } 983 create_mirror(k, Handle(), Handle(), Handle(), Handle(), CHECK); 984 } 985 986 void java_lang_Class::initialize_mirror_fields(Klass* k, 987 Handle mirror, 988 Handle protection_domain, 989 Handle classData, 990 TRAPS) { 991 // Allocate a simple java object for a lock. 992 // This needs to be a java object because during class initialization 993 // it can be held across a java call. 994 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK); 995 set_init_lock(mirror(), r); 996 997 // Set protection domain also 998 set_protection_domain(mirror(), protection_domain()); 999 1000 // Initialize static fields 1001 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK); 1002 1003 // Set classData 1004 set_class_data(mirror(), classData()); 1005 } 1006 1007 // Set the java.lang.Module module field in the java_lang_Class mirror 1008 void java_lang_Class::set_mirror_module_field(JavaThread* current, Klass* k, Handle mirror, Handle module) { 1009 if (module.is_null()) { 1010 // During startup, the module may be null only if java.base has not been defined yet. 1011 // Put the class on the fixup_module_list to patch later when the java.lang.Module 1012 // for java.base is known. But note that since we captured the null module another 1013 // thread may have completed that initialization. 1014 1015 bool javabase_was_defined = false; 1016 { 1017 MutexLocker m1(current, Module_lock); 1018 // Keep list of classes needing java.base module fixup 1019 if (!ModuleEntryTable::javabase_defined()) { 1020 assert(k->java_mirror() != nullptr, "Class's mirror is null"); 1021 k->class_loader_data()->inc_keep_alive_ref_count(); 1022 assert(fixup_module_field_list() != nullptr, "fixup_module_field_list not initialized"); 1023 fixup_module_field_list()->push(k); 1024 } else { 1025 javabase_was_defined = true; 1026 } 1027 } 1028 1029 // If java.base was already defined then patch this particular class with java.base. 1030 if (javabase_was_defined) { 1031 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry(); 1032 assert(javabase_entry != nullptr && javabase_entry->module() != nullptr, 1033 "Setting class module field, " JAVA_BASE_NAME " should be defined"); 1034 Handle javabase_handle(current, javabase_entry->module()); 1035 set_module(mirror(), javabase_handle()); 1036 } 1037 } else { 1038 assert(Universe::is_module_initialized() || 1039 (ModuleEntryTable::javabase_defined() && 1040 (module() == ModuleEntryTable::javabase_moduleEntry()->module())), 1041 "Incorrect java.lang.Module specification while creating mirror"); 1042 set_module(mirror(), module()); 1043 } 1044 } 1045 1046 // Statically allocate fixup lists because they always get created. 1047 void java_lang_Class::allocate_fixup_lists() { 1048 GrowableArray<Klass*>* mirror_list = 1049 new (mtClass) GrowableArray<Klass*>(40, mtClass); 1050 set_fixup_mirror_list(mirror_list); 1051 1052 GrowableArray<Klass*>* module_list = 1053 new (mtModule) GrowableArray<Klass*>(500, mtModule); 1054 set_fixup_module_field_list(module_list); 1055 } 1056 1057 void java_lang_Class::allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData, 1058 Handle& mirror, Handle& comp_mirror, TRAPS) { 1059 // Allocate mirror (java.lang.Class instance) 1060 oop mirror_oop = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(k, CHECK); 1061 mirror = Handle(THREAD, mirror_oop); 1062 1063 // Setup indirection from mirror->klass 1064 set_klass(mirror(), k); 1065 1066 // Set the modifiers flag. 1067 u2 computed_modifiers = k->compute_modifier_flags(); 1068 set_modifiers(mirror(), computed_modifiers); 1069 1070 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass()); 1071 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set"); 1072 1073 set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror())); 1074 1075 // It might also have a component mirror. This mirror must already exist. 1076 if (k->is_array_klass()) { 1077 if (k->is_typeArray_klass()) { 1078 BasicType type = TypeArrayKlass::cast(k)->element_type(); 1079 if (is_scratch) { 1080 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(type)); 1081 } else { 1082 comp_mirror = Handle(THREAD, Universe::java_mirror(type)); 1083 } 1084 } else { 1085 assert(k->is_objArray_klass(), "Must be"); 1086 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass(); 1087 assert(element_klass != nullptr, "Must have an element klass"); 1088 if (is_scratch) { 1089 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass)); 1090 } else { 1091 comp_mirror = Handle(THREAD, element_klass->java_mirror()); 1092 } 1093 } 1094 assert(comp_mirror() != nullptr, "must have a mirror"); 1095 1096 // Two-way link between the array klass and its component mirror: 1097 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k 1098 set_component_mirror(mirror(), comp_mirror()); 1099 // See below for ordering dependencies between field array_klass in component mirror 1100 // and java_mirror in this klass. 1101 } else { 1102 assert(k->is_instance_klass(), "Must be"); 1103 1104 initialize_mirror_fields(k, mirror, protection_domain, classData, THREAD); 1105 if (HAS_PENDING_EXCEPTION) { 1106 // If any of the fields throws an exception like OOM remove the klass field 1107 // from the mirror so GC doesn't follow it after the klass has been deallocated. 1108 // This mirror looks like a primitive type, which logically it is because it 1109 // it represents no class. 1110 set_klass(mirror(), nullptr); 1111 return; 1112 } 1113 } 1114 } 1115 1116 void java_lang_Class::create_mirror(Klass* k, Handle class_loader, 1117 Handle module, Handle protection_domain, 1118 Handle classData, TRAPS) { 1119 assert(k != nullptr, "Use create_basic_type_mirror for primitive types"); 1120 assert(k->java_mirror() == nullptr, "should only assign mirror once"); 1121 1122 // Class_klass has to be loaded because it is used to allocate 1123 // the mirror. 1124 if (vmClasses::Class_klass_loaded()) { 1125 Handle mirror; 1126 Handle comp_mirror; 1127 1128 allocate_mirror(k, /*is_scratch=*/false, protection_domain, classData, mirror, comp_mirror, CHECK); 1129 1130 // set the classLoader field in the java_lang_Class instance 1131 assert(class_loader() == k->class_loader(), "should be same"); 1132 set_class_loader(mirror(), class_loader()); 1133 1134 // Setup indirection from klass->mirror 1135 // after any exceptions can happen during allocations. 1136 k->set_java_mirror(mirror); 1137 1138 // Set the module field in the java_lang_Class instance. This must be done 1139 // after the mirror is set. 1140 set_mirror_module_field(THREAD, k, mirror, module); 1141 1142 if (comp_mirror() != nullptr) { 1143 // Set after k->java_mirror() is published, because compiled code running 1144 // concurrently doesn't expect a k to have a null java_mirror. 1145 release_set_array_klass(comp_mirror(), k); 1146 } 1147 if (CDSConfig::is_dumping_heap()) { 1148 if (CDSConfig::is_dumping_protection_domains()) { 1149 create_scratch_mirror(k, protection_domain, CHECK); 1150 } else { 1151 create_scratch_mirror(k, Handle() /* null protection_domain*/, CHECK); 1152 } 1153 } 1154 } else { 1155 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized"); 1156 fixup_mirror_list()->push(k); 1157 } 1158 } 1159 1160 #if INCLUDE_CDS_JAVA_HEAP 1161 // The "scratch mirror" stores the states of the mirror object that can be 1162 // decided at dump time (such as the initial values of the static fields, the 1163 // component mirror, etc). At runtime, more information is added to it by 1164 // java_lang_Class::restore_archived_mirror(). 1165 // 1166 // Essentially, /*dumptime*/create_scratch_mirror() + /*runtime*/restore_archived_mirror() 1167 // produces the same result as /*runtime*/create_mirror(). 1168 // 1169 // Note: we archive the "scratch mirror" instead of k->java_mirror(), because the 1170 // latter may contain dumptime-specific information that cannot be archived 1171 // (e.g., ClassLoaderData*, or static fields that are modified by Java code execution). 1172 void java_lang_Class::create_scratch_mirror(Klass* k, Handle protection_domain, TRAPS) { 1173 if (k->class_loader() != nullptr && 1174 k->class_loader() != SystemDictionary::java_platform_loader() && 1175 k->class_loader() != SystemDictionary::java_system_loader()) { 1176 // We only archive the mirrors of classes loaded by the built-in loaders 1177 return; 1178 } 1179 1180 Handle classData; // set to null. Will be reinitialized at runtime 1181 Handle mirror; 1182 Handle comp_mirror; 1183 allocate_mirror(k, /*is_scratch=*/true, protection_domain, classData, mirror, comp_mirror, CHECK); 1184 1185 if (comp_mirror() != nullptr) { 1186 release_set_array_klass(comp_mirror(), k); 1187 } 1188 1189 HeapShared::set_scratch_java_mirror(k, mirror()); 1190 } 1191 1192 // Returns true if the mirror is updated, false if no archived mirror 1193 // data is present. After the archived mirror object is restored, the 1194 // shared klass' _has_raw_archived_mirror flag is cleared. 1195 bool java_lang_Class::restore_archived_mirror(Klass *k, 1196 Handle class_loader, Handle module, 1197 Handle protection_domain, TRAPS) { 1198 // Postpone restoring archived mirror until java.lang.Class is loaded. Please 1199 // see more details in vmClasses::resolve_all(). 1200 if (!vmClasses::Class_klass_loaded()) { 1201 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized"); 1202 fixup_mirror_list()->push(k); 1203 return true; 1204 } 1205 1206 oop m = k->archived_java_mirror(); 1207 assert(m != nullptr, "must have stored non-null archived mirror"); 1208 1209 // Sanity: clear it now to prevent re-initialization if any of the following fails 1210 k->clear_archived_mirror_index(); 1211 1212 // mirror is archived, restore 1213 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m)); 1214 assert(as_Klass(m) == k, "must be"); 1215 Handle mirror(THREAD, m); 1216 1217 if (!k->is_array_klass()) { 1218 // - local static final fields with initial values were initialized at dump time 1219 1220 // create the init_lock 1221 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false)); 1222 set_init_lock(mirror(), r); 1223 1224 if (protection_domain.not_null()) { 1225 set_protection_domain(mirror(), protection_domain()); 1226 } 1227 } 1228 1229 assert(class_loader() == k->class_loader(), "should be same"); 1230 if (class_loader.not_null()) { 1231 set_class_loader(mirror(), class_loader()); 1232 } 1233 1234 k->set_java_mirror(mirror); 1235 1236 set_mirror_module_field(THREAD, k, mirror, module); 1237 1238 if (log_is_enabled(Trace, cds, heap, mirror)) { 1239 ResourceMark rm(THREAD); 1240 log_trace(cds, heap, mirror)( 1241 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror())); 1242 } 1243 1244 return true; 1245 } 1246 #endif // INCLUDE_CDS_JAVA_HEAP 1247 1248 void java_lang_Class::fixup_module_field(Klass* k, Handle module) { 1249 assert(_module_offset != 0, "must have been computed already"); 1250 set_module(k->java_mirror(), module()); 1251 } 1252 1253 void java_lang_Class::set_oop_size(HeapWord* java_class, size_t size) { 1254 assert(_oop_size_offset != 0, "must be set"); 1255 assert(size > 0, "Oop size must be greater than zero, not %zu", size); 1256 assert(size <= INT_MAX, "Lossy conversion: %zu", size); 1257 *(int*)(((char*)java_class) + _oop_size_offset) = (int)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 1265 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) { 1266 assert(_static_oop_field_count_offset != 0, "must be set"); 1267 java_class->int_field_put(_static_oop_field_count_offset, size); 1268 } 1269 1270 oop java_lang_Class::protection_domain(oop java_class) { 1271 assert(_protection_domain_offset != 0, "must be set"); 1272 return java_class->obj_field(_protection_domain_offset); 1273 } 1274 void java_lang_Class::set_protection_domain(oop java_class, oop pd) { 1275 assert(_protection_domain_offset != 0, "must be set"); 1276 java_class->obj_field_put(_protection_domain_offset, pd); 1277 } 1278 1279 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) { 1280 assert(_component_mirror_offset != 0, "must be set"); 1281 assert(java_lang_Class::as_Klass(java_class) != nullptr && 1282 java_lang_Class::as_Klass(java_class)->is_array_klass(), "must be"); 1283 java_class->obj_field_put(_component_mirror_offset, comp_mirror); 1284 } 1285 1286 oop java_lang_Class::component_mirror(oop java_class) { 1287 assert(_component_mirror_offset != 0, "must be set"); 1288 return java_class->obj_field(_component_mirror_offset); 1289 } 1290 1291 oop java_lang_Class::init_lock(oop java_class) { 1292 assert(_init_lock_offset != 0, "must be set"); 1293 return java_class->obj_field(_init_lock_offset); 1294 } 1295 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) { 1296 assert(_init_lock_offset != 0, "must be set"); 1297 java_class->obj_field_put(_init_lock_offset, init_lock); 1298 } 1299 1300 objArrayOop java_lang_Class::signers(oop java_class) { 1301 assert(_signers_offset != 0, "must be set"); 1302 return (objArrayOop)java_class->obj_field(_signers_offset); 1303 } 1304 1305 oop java_lang_Class::class_data(oop java_class) { 1306 assert(_classData_offset != 0, "must be set"); 1307 return java_class->obj_field(_classData_offset); 1308 } 1309 void java_lang_Class::set_class_data(oop java_class, oop class_data) { 1310 assert(_classData_offset != 0, "must be set"); 1311 java_class->obj_field_put(_classData_offset, class_data); 1312 } 1313 1314 oop java_lang_Class::reflection_data(oop java_class) { 1315 assert(_reflectionData_offset != 0, "must be set"); 1316 return java_class->obj_field(_reflectionData_offset); 1317 } 1318 1319 bool java_lang_Class::has_reflection_data(oop java_class) { 1320 return (java_lang_Class::reflection_data(java_class) != nullptr); 1321 } 1322 1323 void java_lang_Class::set_reflection_data(oop java_class, oop reflection_data) { 1324 assert(_reflectionData_offset != 0, "must be set"); 1325 java_class->obj_field_put(_reflectionData_offset, reflection_data); 1326 } 1327 1328 void java_lang_Class::set_class_loader(oop java_class, oop loader) { 1329 assert(_class_loader_offset != 0, "offsets should have been initialized"); 1330 java_class->obj_field_put(_class_loader_offset, loader); 1331 } 1332 1333 oop java_lang_Class::class_loader(oop java_class) { 1334 assert(_class_loader_offset != 0, "must be set"); 1335 return java_class->obj_field(_class_loader_offset); 1336 } 1337 1338 oop java_lang_Class::module(oop java_class) { 1339 assert(_module_offset != 0, "must be set"); 1340 return java_class->obj_field(_module_offset); 1341 } 1342 1343 void java_lang_Class::set_module(oop java_class, oop module) { 1344 assert(_module_offset != 0, "must be set"); 1345 java_class->obj_field_put(_module_offset, module); 1346 } 1347 1348 oop java_lang_Class::name(Handle java_class, TRAPS) { 1349 assert(_name_offset != 0, "must be set"); 1350 oop o = java_class->obj_field(_name_offset); 1351 if (o == nullptr) { 1352 o = StringTable::intern(as_external_name(java_class()), THREAD); 1353 java_class->obj_field_put(_name_offset, o); 1354 } 1355 return o; 1356 } 1357 1358 oop java_lang_Class::source_file(oop java_class) { 1359 assert(_source_file_offset != 0, "must be set"); 1360 return java_class->obj_field(_source_file_offset); 1361 } 1362 1363 void java_lang_Class::set_source_file(oop java_class, oop source_file) { 1364 assert(_source_file_offset != 0, "must be set"); 1365 java_class->obj_field_put(_source_file_offset, source_file); 1366 } 1367 1368 void java_lang_Class::set_is_primitive(oop java_class) { 1369 assert(_is_primitive_offset != 0, "must be set"); 1370 java_class->bool_field_put(_is_primitive_offset, true); 1371 } 1372 1373 1374 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) { 1375 // Mirrors for basic types have a null klass field, which makes them special. 1376 oop java_class = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(nullptr, CHECK_NULL); 1377 if (type != T_VOID) { 1378 Klass* aklass = Universe::typeArrayKlass(type); 1379 assert(aklass != nullptr, "correct bootstrap"); 1380 release_set_array_klass(java_class, aklass); 1381 } 1382 #ifdef ASSERT 1383 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(vmClasses::Class_klass()); 1384 assert(static_oop_field_count(java_class) == 0, "should have been zeroed by allocation"); 1385 #endif 1386 set_modifiers(java_class, JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC); 1387 set_is_primitive(java_class); 1388 return java_class; 1389 } 1390 1391 void java_lang_Class::set_klass(oop java_class, Klass* klass) { 1392 assert(is_instance(java_class), "must be a Class object"); 1393 java_class->metadata_field_put(_klass_offset, klass); 1394 } 1395 1396 1397 void java_lang_Class::print_signature(oop java_class, outputStream* st) { 1398 assert(is_instance(java_class), "must be a Class object"); 1399 Symbol* name = nullptr; 1400 bool is_instance = false; 1401 if (is_primitive(java_class)) { 1402 name = vmSymbols::type_signature(primitive_type(java_class)); 1403 } else { 1404 Klass* k = as_Klass(java_class); 1405 is_instance = k->is_instance_klass(); 1406 name = k->name(); 1407 } 1408 if (name == nullptr) { 1409 st->print("<null>"); 1410 return; 1411 } 1412 if (is_instance) st->print("L"); 1413 st->write((char*) name->base(), (int) name->utf8_length()); 1414 if (is_instance) st->print(";"); 1415 } 1416 1417 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) { 1418 assert(is_instance(java_class), "must be a Class object"); 1419 Symbol* name; 1420 if (is_primitive(java_class)) { 1421 name = vmSymbols::type_signature(primitive_type(java_class)); 1422 // Because this can create a new symbol, the caller has to decrement 1423 // the refcount, so make adjustment here and below for symbols returned 1424 // that are not created or incremented due to a successful lookup. 1425 name->increment_refcount(); 1426 } else { 1427 Klass* k = as_Klass(java_class); 1428 if (!k->is_instance_klass()) { 1429 name = k->name(); 1430 name->increment_refcount(); 1431 } else { 1432 ResourceMark rm; 1433 const char* sigstr = k->signature_name(); 1434 int siglen = (int) strlen(sigstr); 1435 if (!intern_if_not_found) { 1436 name = SymbolTable::probe(sigstr, siglen); 1437 } else { 1438 name = SymbolTable::new_symbol(sigstr, siglen); 1439 } 1440 } 1441 } 1442 return name; 1443 } 1444 1445 // Returns the Java name for this Java mirror (Resource allocated) 1446 // See Klass::external_name(). 1447 // For primitive type Java mirrors, its type name is returned. 1448 const char* java_lang_Class::as_external_name(oop java_class) { 1449 assert(is_instance(java_class), "must be a Class object"); 1450 const char* name = nullptr; 1451 if (is_primitive(java_class)) { 1452 name = type2name(primitive_type(java_class)); 1453 } else { 1454 name = as_Klass(java_class)->external_name(); 1455 } 1456 if (name == nullptr) { 1457 name = "<null>"; 1458 } 1459 return name; 1460 } 1461 1462 Klass* java_lang_Class::array_klass_acquire(oop java_class) { 1463 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset)); 1464 assert(k == nullptr || (k->is_klass() && k->is_array_klass()), "should be array klass"); 1465 return k; 1466 } 1467 1468 1469 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) { 1470 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass"); 1471 java_class->release_metadata_field_put(_array_klass_offset, klass); 1472 } 1473 1474 1475 BasicType java_lang_Class::primitive_type(oop java_class) { 1476 assert(is_primitive(java_class), "just checking"); 1477 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1478 BasicType type = T_VOID; 1479 if (ak != nullptr) { 1480 // Note: create_basic_type_mirror above initializes ak to a non-null value. 1481 type = ArrayKlass::cast(ak)->element_type(); 1482 } else { 1483 assert(java_class == Universe::void_mirror(), "only valid non-array primitive"); 1484 } 1485 #ifdef ASSERT 1486 if (CDSConfig::is_dumping_heap()) { 1487 oop mirror = Universe::java_mirror(type); 1488 oop scratch_mirror = HeapShared::scratch_java_mirror(type); 1489 assert(java_class == mirror || java_class == scratch_mirror, "must be consistent"); 1490 } else { 1491 assert(Universe::java_mirror(type) == java_class, "must be consistent"); 1492 } 1493 #endif 1494 return type; 1495 } 1496 1497 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) { 1498 assert(is_instance(java_class), "must be a Class object"); 1499 if (is_primitive(java_class)) { 1500 if (reference_klass != nullptr) 1501 (*reference_klass) = nullptr; 1502 return primitive_type(java_class); 1503 } else { 1504 if (reference_klass != nullptr) 1505 (*reference_klass) = as_Klass(java_class); 1506 return T_OBJECT; 1507 } 1508 } 1509 1510 1511 oop java_lang_Class::primitive_mirror(BasicType t) { 1512 oop mirror = Universe::java_mirror(t); 1513 assert(mirror != nullptr && mirror->is_a(vmClasses::Class_klass()), "must be a Class"); 1514 assert(is_primitive(mirror), "must be primitive"); 1515 return mirror; 1516 } 1517 1518 #define CLASS_FIELDS_DO(macro) \ 1519 macro(_classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false); \ 1520 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \ 1521 macro(_component_mirror_offset, k, "componentType", class_signature, false); \ 1522 macro(_module_offset, k, "module", module_signature, false); \ 1523 macro(_name_offset, k, "name", string_signature, false); \ 1524 macro(_classData_offset, k, "classData", object_signature, false); \ 1525 macro(_reflectionData_offset, k, "reflectionData", class_ReflectionData_signature, false); \ 1526 macro(_signers_offset, k, "signers", object_array_signature, false); \ 1527 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), char_signature, false); \ 1528 macro(_protection_domain_offset, k, "protectionDomain", java_security_ProtectionDomain_signature, false); \ 1529 macro(_is_primitive_offset, k, "primitive", bool_signature, false); 1530 1531 void java_lang_Class::compute_offsets() { 1532 if (_offsets_computed) { 1533 return; 1534 } 1535 1536 _offsets_computed = true; 1537 1538 InstanceKlass* k = vmClasses::Class_klass(); 1539 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1540 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 1541 } 1542 1543 #if INCLUDE_CDS 1544 void java_lang_Class::serialize_offsets(SerializeClosure* f) { 1545 f->do_bool(&_offsets_computed); 1546 1547 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1548 1549 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 1550 } 1551 #endif 1552 1553 int java_lang_Class::classRedefinedCount(oop the_class_mirror) { 1554 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized"); 1555 return the_class_mirror->int_field(_classRedefinedCount_offset); 1556 } 1557 1558 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) { 1559 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized"); 1560 the_class_mirror->int_field_put(_classRedefinedCount_offset, value); 1561 } 1562 1563 int java_lang_Class::modifiers(oop the_class_mirror) { 1564 assert(_modifiers_offset != 0, "offsets should have been initialized"); 1565 return the_class_mirror->char_field(_modifiers_offset); 1566 } 1567 1568 void java_lang_Class::set_modifiers(oop the_class_mirror, u2 value) { 1569 assert(_modifiers_offset != 0, "offsets should have been initialized"); 1570 the_class_mirror->char_field_put(_modifiers_offset, value); 1571 } 1572 1573 1574 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the 1575 // platform thread structure, and a eetop offset which was used for thread 1576 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures 1577 // merged, so in the HotSpot VM we just use the eetop field for the thread 1578 // instead of the privateInfo_offset. 1579 // 1580 // Note: The stackSize field is only present starting in 1.4. 1581 1582 int java_lang_Thread_FieldHolder::_group_offset; 1583 int java_lang_Thread_FieldHolder::_priority_offset; 1584 int java_lang_Thread_FieldHolder::_stackSize_offset; 1585 int java_lang_Thread_FieldHolder::_daemon_offset; 1586 int java_lang_Thread_FieldHolder::_thread_status_offset; 1587 1588 #define THREAD_FIELD_HOLDER_FIELDS_DO(macro) \ 1589 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \ 1590 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \ 1591 macro(_stackSize_offset, k, "stackSize", long_signature, false); \ 1592 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \ 1593 macro(_thread_status_offset, k, "threadStatus", int_signature, false) 1594 1595 void java_lang_Thread_FieldHolder::compute_offsets() { 1596 assert(_group_offset == 0, "offsets should be initialized only once"); 1597 1598 InstanceKlass* k = vmClasses::Thread_FieldHolder_klass(); 1599 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1600 } 1601 1602 #if INCLUDE_CDS 1603 void java_lang_Thread_FieldHolder::serialize_offsets(SerializeClosure* f) { 1604 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1605 } 1606 #endif 1607 1608 oop java_lang_Thread_FieldHolder::threadGroup(oop holder) { 1609 return holder->obj_field(_group_offset); 1610 } 1611 1612 ThreadPriority java_lang_Thread_FieldHolder::priority(oop holder) { 1613 return (ThreadPriority)holder->int_field(_priority_offset); 1614 } 1615 1616 void java_lang_Thread_FieldHolder::set_priority(oop holder, ThreadPriority priority) { 1617 holder->int_field_put(_priority_offset, priority); 1618 } 1619 1620 jlong java_lang_Thread_FieldHolder::stackSize(oop holder) { 1621 return holder->long_field(_stackSize_offset); 1622 } 1623 1624 bool java_lang_Thread_FieldHolder::is_daemon(oop holder) { 1625 return holder->bool_field(_daemon_offset) != 0; 1626 } 1627 1628 void java_lang_Thread_FieldHolder::set_daemon(oop holder, bool val) { 1629 assert(val, "daemon status is never turned off"); 1630 holder->bool_field_put(_daemon_offset, val); 1631 } 1632 1633 void java_lang_Thread_FieldHolder::set_thread_status(oop holder, JavaThreadStatus status) { 1634 holder->int_field_put(_thread_status_offset, static_cast<int>(status)); 1635 } 1636 1637 JavaThreadStatus java_lang_Thread_FieldHolder::get_thread_status(oop holder) { 1638 return static_cast<JavaThreadStatus>(holder->int_field(_thread_status_offset)); 1639 } 1640 1641 1642 int java_lang_Thread_Constants::_static_VTHREAD_GROUP_offset = 0; 1643 1644 #define THREAD_CONSTANTS_STATIC_FIELDS_DO(macro) \ 1645 macro(_static_VTHREAD_GROUP_offset, k, "VTHREAD_GROUP", threadgroup_signature, true); 1646 1647 void java_lang_Thread_Constants::compute_offsets() { 1648 assert(_static_VTHREAD_GROUP_offset == 0, "offsets should be initialized only once"); 1649 1650 InstanceKlass* k = vmClasses::Thread_Constants_klass(); 1651 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1652 } 1653 1654 #if INCLUDE_CDS 1655 void java_lang_Thread_Constants::serialize_offsets(SerializeClosure* f) { 1656 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1657 } 1658 #endif 1659 1660 oop java_lang_Thread_Constants::get_VTHREAD_GROUP() { 1661 InstanceKlass* k = vmClasses::Thread_Constants_klass(); 1662 oop base = k->static_field_base_raw(); 1663 return base->obj_field(_static_VTHREAD_GROUP_offset); 1664 } 1665 1666 1667 int java_lang_Thread::_holder_offset; 1668 int java_lang_Thread::_name_offset; 1669 int java_lang_Thread::_contextClassLoader_offset; 1670 int java_lang_Thread::_eetop_offset; 1671 int java_lang_Thread::_jvmti_thread_state_offset; 1672 int java_lang_Thread::_jvmti_VTMS_transition_disable_count_offset; 1673 int java_lang_Thread::_jvmti_is_in_VTMS_transition_offset; 1674 int java_lang_Thread::_interrupted_offset; 1675 int java_lang_Thread::_interruptLock_offset; 1676 int java_lang_Thread::_tid_offset; 1677 int java_lang_Thread::_continuation_offset; 1678 int java_lang_Thread::_park_blocker_offset; 1679 int java_lang_Thread::_scopedValueBindings_offset; 1680 JFR_ONLY(int java_lang_Thread::_jfr_epoch_offset;) 1681 1682 #define THREAD_FIELDS_DO(macro) \ 1683 macro(_holder_offset, k, "holder", thread_fieldholder_signature, false); \ 1684 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 1685 macro(_contextClassLoader_offset, k, "contextClassLoader", classloader_signature, false); \ 1686 macro(_eetop_offset, k, "eetop", long_signature, false); \ 1687 macro(_interrupted_offset, k, "interrupted", bool_signature, false); \ 1688 macro(_interruptLock_offset, k, "interruptLock", object_signature, false); \ 1689 macro(_tid_offset, k, "tid", long_signature, false); \ 1690 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \ 1691 macro(_continuation_offset, k, "cont", continuation_signature, false); \ 1692 macro(_scopedValueBindings_offset, k, "scopedValueBindings", object_signature, false); 1693 1694 void java_lang_Thread::compute_offsets() { 1695 assert(_holder_offset == 0, "offsets should be initialized only once"); 1696 1697 InstanceKlass* k = vmClasses::Thread_klass(); 1698 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1699 THREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 1700 } 1701 1702 #if INCLUDE_CDS 1703 void java_lang_Thread::serialize_offsets(SerializeClosure* f) { 1704 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1705 THREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 1706 } 1707 #endif 1708 1709 JavaThread* java_lang_Thread::thread(oop java_thread) { 1710 return reinterpret_cast<JavaThread*>(java_thread->address_field(_eetop_offset)); 1711 } 1712 1713 JavaThread* java_lang_Thread::thread_acquire(oop java_thread) { 1714 return reinterpret_cast<JavaThread*>(java_thread->address_field_acquire(_eetop_offset)); 1715 } 1716 1717 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) { 1718 java_thread->address_field_put(_eetop_offset, (address)thread); 1719 } 1720 1721 void java_lang_Thread::release_set_thread(oop java_thread, JavaThread* thread) { 1722 java_thread->release_address_field_put(_eetop_offset, (address)thread); 1723 } 1724 1725 JvmtiThreadState* java_lang_Thread::jvmti_thread_state(oop java_thread) { 1726 return (JvmtiThreadState*)java_thread->address_field(_jvmti_thread_state_offset); 1727 } 1728 1729 void java_lang_Thread::set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state) { 1730 java_thread->address_field_put(_jvmti_thread_state_offset, (address)state); 1731 } 1732 1733 int java_lang_Thread::VTMS_transition_disable_count(oop java_thread) { 1734 return java_thread->int_field(_jvmti_VTMS_transition_disable_count_offset); 1735 } 1736 1737 void java_lang_Thread::inc_VTMS_transition_disable_count(oop java_thread) { 1738 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked"); 1739 int val = VTMS_transition_disable_count(java_thread); 1740 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val + 1); 1741 } 1742 1743 void java_lang_Thread::dec_VTMS_transition_disable_count(oop java_thread) { 1744 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked"); 1745 int val = VTMS_transition_disable_count(java_thread); 1746 assert(val > 0, "VTMS_transition_disable_count should never be negative"); 1747 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val - 1); 1748 } 1749 1750 bool java_lang_Thread::is_in_VTMS_transition(oop java_thread) { 1751 return java_thread->bool_field_volatile(_jvmti_is_in_VTMS_transition_offset); 1752 } 1753 1754 void java_lang_Thread::set_is_in_VTMS_transition(oop java_thread, bool val) { 1755 assert(is_in_VTMS_transition(java_thread) != val, "already %s transition", val ? "inside" : "outside"); 1756 java_thread->bool_field_put_volatile(_jvmti_is_in_VTMS_transition_offset, val); 1757 } 1758 1759 int java_lang_Thread::is_in_VTMS_transition_offset() { 1760 return _jvmti_is_in_VTMS_transition_offset; 1761 } 1762 1763 void java_lang_Thread::clear_scopedValueBindings(oop java_thread) { 1764 assert(java_thread != nullptr, "need a java_lang_Thread pointer here"); 1765 java_thread->obj_field_put(_scopedValueBindings_offset, nullptr); 1766 } 1767 1768 oop java_lang_Thread::holder(oop java_thread) { 1769 // Note: may return null if the thread is still attaching 1770 return java_thread->obj_field(_holder_offset); 1771 } 1772 oop java_lang_Thread::interrupt_lock(oop java_thread) { 1773 return java_thread->obj_field(_interruptLock_offset); 1774 } 1775 1776 bool java_lang_Thread::interrupted(oop java_thread) { 1777 // Make sure the caller can safely access oops. 1778 assert(Thread::current()->is_VM_thread() || 1779 (JavaThread::current()->thread_state() != _thread_blocked && 1780 JavaThread::current()->thread_state() != _thread_in_native), 1781 "Unsafe access to oop"); 1782 return java_thread->bool_field_volatile(_interrupted_offset); 1783 } 1784 1785 void java_lang_Thread::set_interrupted(oop java_thread, bool val) { 1786 // Make sure the caller can safely access oops. 1787 assert(Thread::current()->is_VM_thread() || 1788 (JavaThread::current()->thread_state() != _thread_blocked && 1789 JavaThread::current()->thread_state() != _thread_in_native), 1790 "Unsafe access to oop"); 1791 java_thread->bool_field_put_volatile(_interrupted_offset, val); 1792 } 1793 1794 1795 oop java_lang_Thread::name(oop java_thread) { 1796 return java_thread->obj_field(_name_offset); 1797 } 1798 1799 1800 void java_lang_Thread::set_name(oop java_thread, oop name) { 1801 java_thread->obj_field_put(_name_offset, name); 1802 } 1803 1804 // Convenience macros for setting and getting Thread fields that 1805 // are actually stored in the FieldHolder object of the thread. 1806 // The FieldHolder can be null whilst a thread is attaching via 1807 // JNI, and when the main thread is attaching. 1808 1809 // The default value should be the default/zero initialized value 1810 // of the field as it would be in java.lang.Thread.FieldHolder. 1811 #define GET_FIELDHOLDER_FIELD(java_thread, field, default_val) \ 1812 { \ 1813 oop holder = java_lang_Thread::holder(java_thread); \ 1814 if (holder != nullptr) \ 1815 return java_lang_Thread_FieldHolder::field(holder); \ 1816 else \ 1817 return default_val; \ 1818 } 1819 1820 // We should never be trying to set a field of an attaching thread. 1821 #define SET_FIELDHOLDER_FIELD(java_thread, field, value) \ 1822 { \ 1823 oop holder = java_lang_Thread::holder(java_thread); \ 1824 assert(holder != nullptr, "Thread not fully initialized"); \ 1825 java_lang_Thread_FieldHolder::set_##field(holder, value); \ 1826 } 1827 1828 1829 ThreadPriority java_lang_Thread::priority(oop java_thread) { 1830 GET_FIELDHOLDER_FIELD(java_thread, priority, (ThreadPriority)0); 1831 } 1832 1833 1834 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) { 1835 SET_FIELDHOLDER_FIELD(java_thread, priority, priority) 1836 } 1837 1838 1839 oop java_lang_Thread::threadGroup(oop java_thread) { 1840 GET_FIELDHOLDER_FIELD(java_thread, threadGroup, nullptr); 1841 } 1842 1843 1844 bool java_lang_Thread::is_alive(oop java_thread) { 1845 JavaThread* thr = java_lang_Thread::thread(java_thread); 1846 return (thr != nullptr); 1847 } 1848 1849 1850 bool java_lang_Thread::is_daemon(oop java_thread) { 1851 GET_FIELDHOLDER_FIELD(java_thread, is_daemon, false); 1852 } 1853 1854 1855 void java_lang_Thread::set_daemon(oop java_thread) { 1856 SET_FIELDHOLDER_FIELD(java_thread, daemon, true); 1857 } 1858 1859 oop java_lang_Thread::context_class_loader(oop java_thread) { 1860 return java_thread->obj_field(_contextClassLoader_offset); 1861 } 1862 1863 1864 jlong java_lang_Thread::stackSize(oop java_thread) { 1865 GET_FIELDHOLDER_FIELD(java_thread, stackSize, 0); 1866 } 1867 1868 // Write the thread status value to threadStatus field in java.lang.Thread java class. 1869 void java_lang_Thread::set_thread_status(oop java_thread, JavaThreadStatus status) { 1870 SET_FIELDHOLDER_FIELD(java_thread, thread_status, status); 1871 } 1872 1873 // Read thread status value from threadStatus field in java.lang.Thread java class. 1874 JavaThreadStatus java_lang_Thread::get_thread_status(oop java_thread) { 1875 // Make sure the caller is operating on behalf of the VM or is 1876 // running VM code (state == _thread_in_vm). 1877 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() || 1878 JavaThread::current()->thread_state() == _thread_in_vm, 1879 "Java Thread is not running in vm"); 1880 GET_FIELDHOLDER_FIELD(java_thread, get_thread_status, JavaThreadStatus::NEW /* not initialized */); 1881 } 1882 1883 ByteSize java_lang_Thread::thread_id_offset() { 1884 return in_ByteSize(_tid_offset); 1885 } 1886 1887 oop java_lang_Thread::park_blocker(oop java_thread) { 1888 return java_thread->obj_field(_park_blocker_offset); 1889 } 1890 1891 oop java_lang_Thread::async_get_stack_trace(oop java_thread, TRAPS) { 1892 ThreadsListHandle tlh(JavaThread::current()); 1893 JavaThread* thread; 1894 bool is_virtual = java_lang_VirtualThread::is_instance(java_thread); 1895 if (is_virtual) { 1896 oop carrier_thread = java_lang_VirtualThread::carrier_thread(java_thread); 1897 if (carrier_thread == nullptr) { 1898 return nullptr; 1899 } 1900 thread = java_lang_Thread::thread(carrier_thread); 1901 } else { 1902 thread = java_lang_Thread::thread(java_thread); 1903 } 1904 if (thread == nullptr) { 1905 return nullptr; 1906 } 1907 1908 class GetStackTraceClosure : public HandshakeClosure { 1909 public: 1910 const Handle _java_thread; 1911 int _depth; 1912 bool _retry_handshake; 1913 GrowableArray<Method*>* _methods; 1914 GrowableArray<int>* _bcis; 1915 1916 GetStackTraceClosure(Handle java_thread) : 1917 HandshakeClosure("GetStackTraceClosure"), _java_thread(java_thread), _depth(0), _retry_handshake(false), 1918 _methods(nullptr), _bcis(nullptr) { 1919 } 1920 ~GetStackTraceClosure() { 1921 delete _methods; 1922 delete _bcis; 1923 } 1924 1925 bool read_reset_retry() { 1926 bool ret = _retry_handshake; 1927 // If we re-execute the handshake this method need to return false 1928 // when the handshake cannot be performed. (E.g. thread terminating) 1929 _retry_handshake = false; 1930 return ret; 1931 } 1932 1933 void do_thread(Thread* th) { 1934 if (!Thread::current()->is_Java_thread()) { 1935 _retry_handshake = true; 1936 return; 1937 } 1938 1939 JavaThread* thread = JavaThread::cast(th); 1940 1941 if (!thread->has_last_Java_frame()) { 1942 return; 1943 } 1944 1945 bool carrier = false; 1946 if (java_lang_VirtualThread::is_instance(_java_thread())) { 1947 // if (thread->vthread() != _java_thread()) // We might be inside a System.executeOnCarrierThread 1948 const ContinuationEntry* ce = thread->vthread_continuation(); 1949 if (ce == nullptr || ce->cont_oop(thread) != java_lang_VirtualThread::continuation(_java_thread())) { 1950 return; // not mounted 1951 } 1952 } else { 1953 carrier = (thread->vthread_continuation() != nullptr); 1954 } 1955 1956 const int max_depth = MaxJavaStackTraceDepth; 1957 const bool skip_hidden = !ShowHiddenFrames; 1958 1959 // Pick minimum length that will cover most cases 1960 int init_length = 64; 1961 _methods = new (mtInternal) GrowableArray<Method*>(init_length, mtInternal); 1962 _bcis = new (mtInternal) GrowableArray<int>(init_length, mtInternal); 1963 1964 int total_count = 0; 1965 for (vframeStream vfst(thread, false, false, carrier); // we don't process frames as we don't care about oops 1966 !vfst.at_end() && (max_depth == 0 || max_depth != total_count); 1967 vfst.next()) { 1968 1969 if (skip_hidden && (vfst.method()->is_hidden() || 1970 vfst.method()->is_continuation_enter_intrinsic())) { 1971 continue; 1972 } 1973 1974 _methods->push(vfst.method()); 1975 _bcis->push(vfst.bci()); 1976 total_count++; 1977 } 1978 1979 _depth = total_count; 1980 } 1981 }; 1982 1983 // Handshake with target 1984 ResourceMark rm(THREAD); 1985 HandleMark hm(THREAD); 1986 GetStackTraceClosure gstc(Handle(THREAD, java_thread)); 1987 do { 1988 Handshake::execute(&gstc, &tlh, thread); 1989 } while (gstc.read_reset_retry()); 1990 1991 // Stop if no stack trace is found. 1992 if (gstc._depth == 0) { 1993 return nullptr; 1994 } 1995 1996 // Convert to StackTraceElement array 1997 InstanceKlass* k = vmClasses::StackTraceElement_klass(); 1998 assert(k != nullptr, "must be loaded in 1.4+"); 1999 if (k->should_be_initialized()) { 2000 k->initialize(CHECK_NULL); 2001 } 2002 objArrayHandle trace = oopFactory::new_objArray_handle(k, gstc._depth, CHECK_NULL); 2003 2004 for (int i = 0; i < gstc._depth; i++) { 2005 methodHandle method(THREAD, gstc._methods->at(i)); 2006 oop element = java_lang_StackTraceElement::create(method, 2007 gstc._bcis->at(i), 2008 CHECK_NULL); 2009 trace->obj_at_put(i, element); 2010 } 2011 2012 return trace(); 2013 } 2014 2015 const char* java_lang_Thread::thread_status_name(oop java_thread) { 2016 JavaThreadStatus status = get_thread_status(java_thread); 2017 switch (status) { 2018 case JavaThreadStatus::NEW : return "NEW"; 2019 case JavaThreadStatus::RUNNABLE : return "RUNNABLE"; 2020 case JavaThreadStatus::SLEEPING : return "TIMED_WAITING (sleeping)"; 2021 case JavaThreadStatus::IN_OBJECT_WAIT : return "WAITING (on object monitor)"; 2022 case JavaThreadStatus::IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)"; 2023 case JavaThreadStatus::PARKED : return "WAITING (parking)"; 2024 case JavaThreadStatus::PARKED_TIMED : return "TIMED_WAITING (parking)"; 2025 case JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)"; 2026 case JavaThreadStatus::TERMINATED : return "TERMINATED"; 2027 default : return "UNKNOWN"; 2028 }; 2029 } 2030 int java_lang_ThreadGroup::_parent_offset; 2031 int java_lang_ThreadGroup::_name_offset; 2032 int java_lang_ThreadGroup::_maxPriority_offset; 2033 int java_lang_ThreadGroup::_daemon_offset; 2034 2035 oop java_lang_ThreadGroup::parent(oop java_thread_group) { 2036 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 2037 return java_thread_group->obj_field(_parent_offset); 2038 } 2039 2040 // ("name as oop" accessor is not necessary) 2041 2042 const char* java_lang_ThreadGroup::name(oop java_thread_group) { 2043 oop name = java_thread_group->obj_field(_name_offset); 2044 // ThreadGroup.name can be null 2045 if (name != nullptr) { 2046 return java_lang_String::as_utf8_string(name); 2047 } 2048 return nullptr; 2049 } 2050 2051 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) { 2052 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 2053 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset); 2054 } 2055 2056 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) { 2057 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 2058 return java_thread_group->bool_field(_daemon_offset) != 0; 2059 } 2060 2061 #define THREADGROUP_FIELDS_DO(macro) \ 2062 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \ 2063 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 2064 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \ 2065 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); 2066 2067 void java_lang_ThreadGroup::compute_offsets() { 2068 assert(_parent_offset == 0, "offsets should be initialized only once"); 2069 2070 InstanceKlass* k = vmClasses::ThreadGroup_klass(); 2071 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2072 } 2073 2074 #if INCLUDE_CDS 2075 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) { 2076 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2077 } 2078 #endif 2079 2080 2081 // java_lang_VirtualThread 2082 2083 int java_lang_VirtualThread::static_vthread_scope_offset; 2084 int java_lang_VirtualThread::_carrierThread_offset; 2085 int java_lang_VirtualThread::_continuation_offset; 2086 int java_lang_VirtualThread::_state_offset; 2087 int java_lang_VirtualThread::_next_offset; 2088 int java_lang_VirtualThread::_onWaitingList_offset; 2089 int java_lang_VirtualThread::_notified_offset; 2090 int java_lang_VirtualThread::_timeout_offset; 2091 int java_lang_VirtualThread::_objectWaiter_offset; 2092 2093 #define VTHREAD_FIELDS_DO(macro) \ 2094 macro(static_vthread_scope_offset, k, "VTHREAD_SCOPE", continuationscope_signature, true); \ 2095 macro(_carrierThread_offset, k, "carrierThread", thread_signature, false); \ 2096 macro(_continuation_offset, k, "cont", continuation_signature, false); \ 2097 macro(_state_offset, k, "state", int_signature, false); \ 2098 macro(_next_offset, k, "next", vthread_signature, false); \ 2099 macro(_onWaitingList_offset, k, "onWaitingList", bool_signature, false); \ 2100 macro(_notified_offset, k, "notified", bool_signature, false); \ 2101 macro(_timeout_offset, k, "timeout", long_signature, false); 2102 2103 2104 void java_lang_VirtualThread::compute_offsets() { 2105 InstanceKlass* k = vmClasses::VirtualThread_klass(); 2106 VTHREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2107 VTHREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 2108 } 2109 2110 bool java_lang_VirtualThread::is_instance(oop obj) { 2111 return obj != nullptr && is_subclass(obj->klass()); 2112 } 2113 2114 oop java_lang_VirtualThread::carrier_thread(oop vthread) { 2115 oop thread = vthread->obj_field(_carrierThread_offset); 2116 return thread; 2117 } 2118 2119 oop java_lang_VirtualThread::continuation(oop vthread) { 2120 oop cont = vthread->obj_field(_continuation_offset); 2121 return cont; 2122 } 2123 2124 int java_lang_VirtualThread::state(oop vthread) { 2125 return vthread->int_field_acquire(_state_offset); 2126 } 2127 2128 void java_lang_VirtualThread::set_state(oop vthread, int state) { 2129 vthread->release_int_field_put(_state_offset, state); 2130 } 2131 2132 int java_lang_VirtualThread::cmpxchg_state(oop vthread, int old_state, int new_state) { 2133 jint* addr = vthread->field_addr<jint>(_state_offset); 2134 int res = Atomic::cmpxchg(addr, old_state, new_state); 2135 return res; 2136 } 2137 2138 oop java_lang_VirtualThread::next(oop vthread) { 2139 return vthread->obj_field(_next_offset); 2140 } 2141 2142 void java_lang_VirtualThread::set_next(oop vthread, oop next_vthread) { 2143 vthread->obj_field_put(_next_offset, next_vthread); 2144 } 2145 2146 // Add vthread to the waiting list if it's not already in it. Multiple threads 2147 // could be trying to add vthread to the list at the same time, so we control 2148 // access with a cmpxchg on onWaitingList. The winner adds vthread to the list. 2149 // Method returns true if we added vthread to the list, false otherwise. 2150 bool java_lang_VirtualThread::set_onWaitingList(oop vthread, OopHandle& list_head) { 2151 jboolean* addr = vthread->field_addr<jboolean>(_onWaitingList_offset); 2152 jboolean vthread_on_list = Atomic::load(addr); 2153 if (!vthread_on_list) { 2154 vthread_on_list = Atomic::cmpxchg(addr, (jboolean)JNI_FALSE, (jboolean)JNI_TRUE); 2155 if (!vthread_on_list) { 2156 for (;;) { 2157 oop head = list_head.resolve(); 2158 java_lang_VirtualThread::set_next(vthread, head); 2159 if (list_head.cmpxchg(head, vthread) == head) return true; 2160 } 2161 } 2162 } 2163 return false; // already on waiting list 2164 } 2165 2166 void java_lang_VirtualThread::set_notified(oop vthread, jboolean value) { 2167 vthread->bool_field_put_volatile(_notified_offset, value); 2168 } 2169 2170 jlong java_lang_VirtualThread::timeout(oop vthread) { 2171 return vthread->long_field(_timeout_offset); 2172 } 2173 2174 void java_lang_VirtualThread::set_timeout(oop vthread, jlong value) { 2175 vthread->long_field_put(_timeout_offset, value); 2176 } 2177 2178 JavaThreadStatus java_lang_VirtualThread::map_state_to_thread_status(int state) { 2179 JavaThreadStatus status = JavaThreadStatus::NEW; 2180 switch (state & ~SUSPENDED) { 2181 case NEW: 2182 status = JavaThreadStatus::NEW; 2183 break; 2184 case STARTED: 2185 case RUNNING: 2186 case PARKING: 2187 case TIMED_PARKING: 2188 case UNPARKED: 2189 case YIELDING: 2190 case YIELDED: 2191 case UNBLOCKED: 2192 case WAITING: 2193 case TIMED_WAITING: 2194 status = JavaThreadStatus::RUNNABLE; 2195 break; 2196 case PARKED: 2197 case PINNED: 2198 status = JavaThreadStatus::PARKED; 2199 break; 2200 case TIMED_PARKED: 2201 case TIMED_PINNED: 2202 status = JavaThreadStatus::PARKED_TIMED; 2203 break; 2204 case BLOCKING: 2205 case BLOCKED: 2206 status = JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER; 2207 break; 2208 case WAIT: 2209 status = JavaThreadStatus::IN_OBJECT_WAIT; 2210 break; 2211 case TIMED_WAIT: 2212 status = JavaThreadStatus::IN_OBJECT_WAIT_TIMED; 2213 break; 2214 case TERMINATED: 2215 status = JavaThreadStatus::TERMINATED; 2216 break; 2217 default: 2218 ShouldNotReachHere(); 2219 } 2220 return status; 2221 } 2222 2223 ObjectMonitor* java_lang_VirtualThread::current_pending_monitor(oop vthread) { 2224 ObjectWaiter* waiter = objectWaiter(vthread); 2225 if (waiter != nullptr && waiter->at_monitorenter()) { 2226 return waiter->monitor(); 2227 } 2228 return nullptr; 2229 } 2230 2231 ObjectMonitor* java_lang_VirtualThread::current_waiting_monitor(oop vthread) { 2232 ObjectWaiter* waiter = objectWaiter(vthread); 2233 if (waiter != nullptr && waiter->is_wait()) { 2234 return waiter->monitor(); 2235 } 2236 return nullptr; 2237 } 2238 2239 bool java_lang_VirtualThread::is_preempted(oop vthread) { 2240 oop continuation = java_lang_VirtualThread::continuation(vthread); 2241 assert(continuation != nullptr, "vthread with no continuation"); 2242 stackChunkOop chunk = jdk_internal_vm_Continuation::tail(continuation); 2243 return chunk != nullptr && chunk->preempted(); 2244 } 2245 2246 #if INCLUDE_CDS 2247 void java_lang_VirtualThread::serialize_offsets(SerializeClosure* f) { 2248 VTHREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2249 VTHREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 2250 } 2251 #endif 2252 2253 // java_lang_Throwable 2254 2255 int java_lang_Throwable::_backtrace_offset; 2256 int java_lang_Throwable::_detailMessage_offset; 2257 int java_lang_Throwable::_stackTrace_offset; 2258 int java_lang_Throwable::_depth_offset; 2259 int java_lang_Throwable::_cause_offset; 2260 int java_lang_Throwable::_static_unassigned_stacktrace_offset; 2261 2262 #define THROWABLE_FIELDS_DO(macro) \ 2263 macro(_backtrace_offset, k, "backtrace", object_signature, false); \ 2264 macro(_detailMessage_offset, k, "detailMessage", string_signature, false); \ 2265 macro(_stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \ 2266 macro(_depth_offset, k, "depth", int_signature, false); \ 2267 macro(_cause_offset, k, "cause", throwable_signature, false); \ 2268 macro(_static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true) 2269 2270 void java_lang_Throwable::compute_offsets() { 2271 InstanceKlass* k = vmClasses::Throwable_klass(); 2272 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2273 } 2274 2275 #if INCLUDE_CDS 2276 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) { 2277 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2278 } 2279 #endif 2280 2281 oop java_lang_Throwable::unassigned_stacktrace() { 2282 InstanceKlass* ik = vmClasses::Throwable_klass(); 2283 oop base = ik->static_field_base_raw(); 2284 return base->obj_field(_static_unassigned_stacktrace_offset); 2285 } 2286 2287 oop java_lang_Throwable::backtrace(oop throwable) { 2288 return throwable->obj_field_acquire(_backtrace_offset); 2289 } 2290 2291 2292 void java_lang_Throwable::set_backtrace(oop throwable, oop value) { 2293 throwable->release_obj_field_put(_backtrace_offset, value); 2294 } 2295 2296 int java_lang_Throwable::depth(oop throwable) { 2297 return throwable->int_field(_depth_offset); 2298 } 2299 2300 void java_lang_Throwable::set_depth(oop throwable, int value) { 2301 throwable->int_field_put(_depth_offset, value); 2302 } 2303 2304 oop java_lang_Throwable::message(oop throwable) { 2305 return throwable->obj_field(_detailMessage_offset); 2306 } 2307 2308 const char* java_lang_Throwable::message_as_utf8(oop throwable) { 2309 oop msg = java_lang_Throwable::message(throwable); 2310 const char* msg_utf8 = nullptr; 2311 if (msg != nullptr) { 2312 msg_utf8 = java_lang_String::as_utf8_string(msg); 2313 } 2314 return msg_utf8; 2315 } 2316 2317 oop java_lang_Throwable::cause(oop throwable) { 2318 return throwable->obj_field(_cause_offset); 2319 } 2320 2321 void java_lang_Throwable::set_message(oop throwable, oop value) { 2322 throwable->obj_field_put(_detailMessage_offset, value); 2323 } 2324 2325 2326 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) { 2327 throwable->obj_field_put(_stackTrace_offset, st_element_array); 2328 } 2329 2330 void java_lang_Throwable::clear_stacktrace(oop throwable) { 2331 set_stacktrace(throwable, nullptr); 2332 } 2333 2334 oop java_lang_Throwable::create_exception_instance(Symbol* class_name, TRAPS) { 2335 Klass* k = SystemDictionary::resolve_or_fail(class_name, true, CHECK_NULL); 2336 return InstanceKlass::cast(k)->allocate_instance(CHECK_NULL); 2337 } 2338 2339 void java_lang_Throwable::print(oop throwable, outputStream* st) { 2340 ResourceMark rm; 2341 Klass* k = throwable->klass(); 2342 assert(k != nullptr, "just checking"); 2343 st->print("%s", k->external_name()); 2344 oop msg = message(throwable); 2345 if (msg != nullptr) { 2346 st->print(": %s", java_lang_String::as_utf8_string(msg)); 2347 } 2348 } 2349 2350 // After this many redefines, the stack trace is unreliable. 2351 const int MAX_VERSION = USHRT_MAX; 2352 2353 static inline bool version_matches(Method* method, int version) { 2354 assert(version < MAX_VERSION, "version is too big"); 2355 return method != nullptr && (method->constants()->version() == version); 2356 } 2357 2358 // This class provides a simple wrapper over the internal structure of 2359 // exception backtrace to insulate users of the backtrace from needing 2360 // to know what it looks like. 2361 // The code of this class is not GC safe. Allocations can only happen 2362 // in expand(). 2363 class BacktraceBuilder: public StackObj { 2364 friend class BacktraceIterator; 2365 private: 2366 Handle _backtrace; 2367 objArrayOop _head; 2368 typeArrayOop _methods; 2369 typeArrayOop _bcis; 2370 objArrayOop _mirrors; 2371 typeArrayOop _names; // Needed to insulate method name against redefinition. 2372 // True if the top frame of the backtrace is omitted because it shall be hidden. 2373 bool _has_hidden_top_frame; 2374 int _index; 2375 NoSafepointVerifier _nsv; 2376 2377 enum { 2378 trace_methods_offset = java_lang_Throwable::trace_methods_offset, 2379 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset, 2380 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset, 2381 trace_names_offset = java_lang_Throwable::trace_names_offset, 2382 trace_conts_offset = java_lang_Throwable::trace_conts_offset, 2383 trace_next_offset = java_lang_Throwable::trace_next_offset, 2384 trace_hidden_offset = java_lang_Throwable::trace_hidden_offset, 2385 trace_size = java_lang_Throwable::trace_size, 2386 trace_chunk_size = java_lang_Throwable::trace_chunk_size 2387 }; 2388 2389 // get info out of chunks 2390 static typeArrayOop get_methods(objArrayHandle chunk) { 2391 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset)); 2392 assert(methods != nullptr, "method array should be initialized in backtrace"); 2393 return methods; 2394 } 2395 static typeArrayOop get_bcis(objArrayHandle chunk) { 2396 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 2397 assert(bcis != nullptr, "bci array should be initialized in backtrace"); 2398 return bcis; 2399 } 2400 static objArrayOop get_mirrors(objArrayHandle chunk) { 2401 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset)); 2402 assert(mirrors != nullptr, "mirror array should be initialized in backtrace"); 2403 return mirrors; 2404 } 2405 static typeArrayOop get_names(objArrayHandle chunk) { 2406 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset)); 2407 assert(names != nullptr, "names array should be initialized in backtrace"); 2408 return names; 2409 } 2410 static bool has_hidden_top_frame(objArrayHandle chunk) { 2411 oop hidden = chunk->obj_at(trace_hidden_offset); 2412 return hidden != nullptr; 2413 } 2414 2415 public: 2416 2417 // constructor for new backtrace 2418 BacktraceBuilder(TRAPS): _head(nullptr), _methods(nullptr), _bcis(nullptr), _mirrors(nullptr), _names(nullptr), _has_hidden_top_frame(false) { 2419 expand(CHECK); 2420 _backtrace = Handle(THREAD, _head); 2421 _index = 0; 2422 } 2423 2424 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) { 2425 _methods = get_methods(backtrace); 2426 _bcis = get_bcis(backtrace); 2427 _mirrors = get_mirrors(backtrace); 2428 _names = get_names(backtrace); 2429 _has_hidden_top_frame = has_hidden_top_frame(backtrace); 2430 assert(_methods->length() == _bcis->length() && 2431 _methods->length() == _mirrors->length() && 2432 _mirrors->length() == _names->length(), 2433 "method and source information arrays should match"); 2434 2435 // head is the preallocated backtrace 2436 _head = backtrace(); 2437 _backtrace = Handle(thread, _head); 2438 _index = 0; 2439 } 2440 2441 void expand(TRAPS) { 2442 objArrayHandle old_head(THREAD, _head); 2443 PauseNoSafepointVerifier pnsv(&_nsv); 2444 2445 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK); 2446 objArrayHandle new_head(THREAD, head); 2447 2448 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK); 2449 typeArrayHandle new_methods(THREAD, methods); 2450 2451 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK); 2452 typeArrayHandle new_bcis(THREAD, bcis); 2453 2454 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK); 2455 objArrayHandle new_mirrors(THREAD, mirrors); 2456 2457 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK); 2458 typeArrayHandle new_names(THREAD, names); 2459 2460 if (!old_head.is_null()) { 2461 old_head->obj_at_put(trace_next_offset, new_head()); 2462 } 2463 new_head->obj_at_put(trace_methods_offset, new_methods()); 2464 new_head->obj_at_put(trace_bcis_offset, new_bcis()); 2465 new_head->obj_at_put(trace_mirrors_offset, new_mirrors()); 2466 new_head->obj_at_put(trace_names_offset, new_names()); 2467 new_head->obj_at_put(trace_hidden_offset, nullptr); 2468 2469 _head = new_head(); 2470 _methods = new_methods(); 2471 _bcis = new_bcis(); 2472 _mirrors = new_mirrors(); 2473 _names = new_names(); 2474 _index = 0; 2475 } 2476 2477 oop backtrace() { 2478 return _backtrace(); 2479 } 2480 2481 inline void push(Method* method, int bci, TRAPS) { 2482 // Smear the -1 bci to 0 since the array only holds unsigned 2483 // shorts. The later line number lookup would just smear the -1 2484 // to a 0 even if it could be recorded. 2485 if (bci == SynchronizationEntryBCI) bci = 0; 2486 2487 if (_index >= trace_chunk_size) { 2488 methodHandle mhandle(THREAD, method); 2489 expand(CHECK); 2490 method = mhandle(); 2491 } 2492 2493 _methods->ushort_at_put(_index, method->orig_method_idnum()); 2494 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version())); 2495 2496 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the 2497 // klass owning the symbols alive so their refcounts aren't decremented. 2498 Symbol* name = method->name(); 2499 _names->symbol_at_put(_index, name); 2500 2501 // We need to save the mirrors in the backtrace to keep the class 2502 // from being unloaded while we still have this stack trace. 2503 assert(method->method_holder()->java_mirror() != nullptr, "never push null for mirror"); 2504 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror()); 2505 2506 _index++; 2507 } 2508 2509 void set_has_hidden_top_frame() { 2510 if (!_has_hidden_top_frame) { 2511 // It would be nice to add java/lang/Boolean::TRUE here 2512 // to indicate that this backtrace has a hidden top frame. 2513 // But this code is used before TRUE is allocated. 2514 // Therefore let's just use an arbitrary legal oop 2515 // available right here. _methods is a short[]. 2516 assert(_methods != nullptr, "we need a legal oop"); 2517 _has_hidden_top_frame = true; 2518 _head->obj_at_put(trace_hidden_offset, _methods); 2519 } 2520 } 2521 }; 2522 2523 struct BacktraceElement : public StackObj { 2524 int _method_id; 2525 int _bci; 2526 int _version; 2527 Symbol* _name; 2528 Handle _mirror; 2529 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) : 2530 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {} 2531 }; 2532 2533 class BacktraceIterator : public StackObj { 2534 int _index; 2535 objArrayHandle _result; 2536 objArrayHandle _mirrors; 2537 typeArrayHandle _methods; 2538 typeArrayHandle _bcis; 2539 typeArrayHandle _names; 2540 2541 void init(objArrayHandle result, Thread* thread) { 2542 // Get method id, bci, version and mirror from chunk 2543 _result = result; 2544 if (_result.not_null()) { 2545 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result)); 2546 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result)); 2547 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result)); 2548 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result)); 2549 _index = 0; 2550 } 2551 } 2552 public: 2553 BacktraceIterator(objArrayHandle result, Thread* thread) { 2554 init(result, thread); 2555 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match"); 2556 } 2557 2558 BacktraceElement next(Thread* thread) { 2559 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)), 2560 _methods->ushort_at(_index), 2561 Backtrace::version_at(_bcis->int_at(_index)), 2562 Backtrace::bci_at(_bcis->int_at(_index)), 2563 _names->symbol_at(_index)); 2564 _index++; 2565 2566 if (_index >= java_lang_Throwable::trace_chunk_size) { 2567 int next_offset = java_lang_Throwable::trace_next_offset; 2568 // Get next chunk 2569 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset))); 2570 init(result, thread); 2571 } 2572 return e; 2573 } 2574 2575 bool repeat() { 2576 return _result.not_null() && _mirrors->obj_at(_index) != nullptr; 2577 } 2578 }; 2579 2580 2581 // Print stack trace element to resource allocated buffer 2582 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id, 2583 int version, int bci, Symbol* name) { 2584 ResourceMark rm; 2585 2586 // Get strings and string lengths 2587 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 2588 const char* klass_name = holder->external_name(); 2589 int buf_len = (int)strlen(klass_name); 2590 2591 char* method_name = name->as_C_string(); 2592 buf_len += (int)strlen(method_name); 2593 2594 char* source_file_name = nullptr; 2595 Symbol* source = Backtrace::get_source_file_name(holder, version); 2596 if (source != nullptr) { 2597 source_file_name = source->as_C_string(); 2598 buf_len += (int)strlen(source_file_name); 2599 } 2600 2601 char *module_name = nullptr, *module_version = nullptr; 2602 ModuleEntry* module = holder->module(); 2603 if (module->is_named()) { 2604 module_name = module->name()->as_C_string(); 2605 buf_len += (int)strlen(module_name); 2606 if (module->version() != nullptr) { 2607 module_version = module->version()->as_C_string(); 2608 buf_len += (int)strlen(module_version); 2609 } 2610 } 2611 2612 // Allocate temporary buffer with extra space for formatting and line number 2613 const size_t buf_size = buf_len + 64; 2614 char* buf = NEW_RESOURCE_ARRAY(char, buf_size); 2615 2616 // Print stack trace line in buffer 2617 size_t buf_off = os::snprintf_checked(buf, buf_size, "\tat %s.%s(", klass_name, method_name); 2618 2619 // Print module information 2620 if (module_name != nullptr) { 2621 if (module_version != nullptr) { 2622 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s@%s/", module_name, module_version); 2623 } else { 2624 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s/", module_name); 2625 } 2626 } 2627 2628 // The method can be null if the requested class version is gone 2629 Method* method = holder->method_with_orig_idnum(method_id, version); 2630 if (!version_matches(method, version)) { 2631 strcat(buf, "Redefined)"); 2632 } else { 2633 int line_number = Backtrace::get_line_number(method, bci); 2634 if (line_number == -2) { 2635 strcat(buf, "Native Method)"); 2636 } else { 2637 if (source_file_name != nullptr && (line_number != -1)) { 2638 // Sourcename and linenumber 2639 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s:%d)", source_file_name, line_number); 2640 } else if (source_file_name != nullptr) { 2641 // Just sourcename 2642 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s)", source_file_name); 2643 } else { 2644 // Neither sourcename nor linenumber 2645 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "Unknown Source)"); 2646 } 2647 nmethod* nm = method->code(); 2648 if (WizardMode && nm != nullptr) { 2649 os::snprintf_checked(buf + buf_off, buf_size - buf_off, "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm); 2650 } 2651 } 2652 } 2653 2654 st->print_cr("%s", buf); 2655 } 2656 2657 void java_lang_Throwable::print_stack_element(outputStream *st, Method* method, int bci) { 2658 Handle mirror (Thread::current(), method->method_holder()->java_mirror()); 2659 int method_id = method->orig_method_idnum(); 2660 int version = method->constants()->version(); 2661 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name()); 2662 } 2663 2664 /** 2665 * Print the throwable message and its stack trace plus all causes by walking the 2666 * cause chain. The output looks the same as of Throwable.printStackTrace(). 2667 */ 2668 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) { 2669 // First, print the message. 2670 print(throwable(), st); 2671 st->cr(); 2672 2673 // Now print the stack trace. 2674 JavaThread* THREAD = JavaThread::current(); // For exception macros. 2675 while (throwable.not_null()) { 2676 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable()))); 2677 if (result.is_null()) { 2678 st->print_raw_cr("\t<<no stack trace available>>"); 2679 return; 2680 } 2681 BacktraceIterator iter(result, THREAD); 2682 2683 while (iter.repeat()) { 2684 BacktraceElement bte = iter.next(THREAD); 2685 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name); 2686 } 2687 if (THREAD->can_call_java()) { 2688 // Call getCause() which doesn't necessarily return the _cause field. 2689 ExceptionMark em(THREAD); 2690 JavaValue cause(T_OBJECT); 2691 JavaCalls::call_virtual(&cause, 2692 throwable, 2693 throwable->klass(), 2694 vmSymbols::getCause_name(), 2695 vmSymbols::void_throwable_signature(), 2696 THREAD); 2697 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 2698 if (HAS_PENDING_EXCEPTION) { 2699 CLEAR_PENDING_EXCEPTION; 2700 throwable = Handle(); 2701 } else { 2702 throwable = Handle(THREAD, cause.get_oop()); 2703 if (throwable.not_null()) { 2704 st->print("Caused by: "); 2705 print(throwable(), st); 2706 st->cr(); 2707 } 2708 } 2709 } else { 2710 st->print_raw_cr("<<cannot call Java to get cause>>"); 2711 return; 2712 } 2713 } 2714 } 2715 2716 /** 2717 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace(). 2718 */ 2719 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) { 2720 assert(throwable->is_a(vmClasses::Throwable_klass()), "Throwable instance expected"); 2721 JavaValue result(T_VOID); 2722 JavaCalls::call_virtual(&result, 2723 throwable, 2724 vmClasses::Throwable_klass(), 2725 vmSymbols::printStackTrace_name(), 2726 vmSymbols::void_method_signature(), 2727 THREAD); 2728 } 2729 2730 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) { 2731 if (!StackTraceInThrowable) return; 2732 ResourceMark rm(THREAD); 2733 2734 // Start out by clearing the backtrace for this object, in case the VM 2735 // runs out of memory while allocating the stack trace 2736 set_backtrace(throwable(), nullptr); 2737 // Clear lazily constructed Java level stacktrace if refilling occurs 2738 // This is unnecessary in 1.7+ but harmless 2739 clear_stacktrace(throwable()); 2740 2741 int max_depth = MaxJavaStackTraceDepth; 2742 JavaThread* thread = THREAD; 2743 2744 BacktraceBuilder bt(CHECK); 2745 2746 // If there is no Java frame just return the method that was being called 2747 // with bci 0 2748 if (!thread->has_last_Java_frame()) { 2749 if (max_depth >= 1 && method() != nullptr) { 2750 bt.push(method(), 0, CHECK); 2751 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1); 2752 set_depth(throwable(), 1); 2753 set_backtrace(throwable(), bt.backtrace()); 2754 } 2755 return; 2756 } 2757 2758 // Instead of using vframe directly, this version of fill_in_stack_trace 2759 // basically handles everything by hand. This significantly improved the 2760 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows. 2761 // See bug 6333838 for more details. 2762 // The "ASSERT" here is to verify this method generates the exactly same stack 2763 // trace as utilizing vframe. 2764 #ifdef ASSERT 2765 vframeStream st(thread, false /* stop_at_java_call_stub */, false /* process_frames */); 2766 #endif 2767 int total_count = 0; 2768 RegisterMap map(thread, 2769 RegisterMap::UpdateMap::skip, 2770 RegisterMap::ProcessFrames::skip, 2771 RegisterMap::WalkContinuation::include); 2772 int decode_offset = 0; 2773 nmethod* nm = nullptr; 2774 bool skip_fillInStackTrace_check = false; 2775 bool skip_throwableInit_check = false; 2776 bool skip_hidden = !ShowHiddenFrames; 2777 bool show_carrier = ShowCarrierFrames; 2778 ContinuationEntry* cont_entry = thread->last_continuation(); 2779 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) { 2780 Method* method = nullptr; 2781 int bci = 0; 2782 2783 // Compiled java method case. 2784 if (decode_offset != 0) { 2785 DebugInfoReadStream stream(nm, decode_offset); 2786 decode_offset = stream.read_int(); 2787 method = (Method*)nm->metadata_at(stream.read_int()); 2788 bci = stream.read_bci(); 2789 } else { 2790 if (fr.is_first_frame()) break; 2791 2792 if (Continuation::is_continuation_enterSpecial(fr)) { 2793 assert(cont_entry == Continuation::get_continuation_entry_for_entry_frame(thread, fr), ""); 2794 if (!show_carrier && cont_entry->is_virtual_thread()) { 2795 break; 2796 } 2797 cont_entry = cont_entry->parent(); 2798 } 2799 2800 address pc = fr.pc(); 2801 if (fr.is_interpreted_frame()) { 2802 address bcp; 2803 if (!map.in_cont()) { 2804 bcp = fr.interpreter_frame_bcp(); 2805 method = fr.interpreter_frame_method(); 2806 } else { 2807 bcp = map.stack_chunk()->interpreter_frame_bcp(fr); 2808 method = map.stack_chunk()->interpreter_frame_method(fr); 2809 } 2810 bci = method->bci_from(bcp); 2811 fr = fr.sender(&map); 2812 } else { 2813 CodeBlob* cb = fr.cb(); 2814 // HMMM QQQ might be nice to have frame return nm as null if cb is non-null 2815 // but non nmethod 2816 fr = fr.sender(&map); 2817 if (cb == nullptr || !cb->is_nmethod()) { 2818 continue; 2819 } 2820 nm = cb->as_nmethod(); 2821 assert(nm->method() != nullptr, "must be"); 2822 if (nm->method()->is_native()) { 2823 method = nm->method(); 2824 bci = 0; 2825 } else { 2826 PcDesc* pd = nm->pc_desc_at(pc); 2827 decode_offset = pd->scope_decode_offset(); 2828 // if decode_offset is not equal to 0, it will execute the 2829 // "compiled java method case" at the beginning of the loop. 2830 continue; 2831 } 2832 } 2833 } 2834 #ifdef ASSERT 2835 if (!st.at_end()) { // TODO LOOM remove once we show only vthread trace 2836 assert(st.method() == method && st.bci() == bci, "Wrong stack trace"); 2837 st.next(); 2838 } 2839 #endif 2840 2841 // the format of the stacktrace will be: 2842 // - 1 or more fillInStackTrace frames for the exception class (skipped) 2843 // - 0 or more <init> methods for the exception class (skipped) 2844 // - rest of the stack 2845 2846 if (!skip_fillInStackTrace_check) { 2847 if (method->name() == vmSymbols::fillInStackTrace_name() && 2848 throwable->is_a(method->method_holder())) { 2849 continue; 2850 } 2851 else { 2852 skip_fillInStackTrace_check = true; // gone past them all 2853 } 2854 } 2855 if (!skip_throwableInit_check) { 2856 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering"); 2857 2858 // skip <init> methods of the exception class and superclasses 2859 // This is similar to classic VM. 2860 if (method->name() == vmSymbols::object_initializer_name() && 2861 throwable->is_a(method->method_holder())) { 2862 continue; 2863 } else { 2864 // there are none or we've seen them all - either way stop checking 2865 skip_throwableInit_check = true; 2866 } 2867 } 2868 if (method->is_hidden() || method->is_continuation_enter_intrinsic()) { 2869 if (skip_hidden) { 2870 if (total_count == 0) { 2871 // The top frame will be hidden from the stack trace. 2872 bt.set_has_hidden_top_frame(); 2873 } 2874 continue; 2875 } 2876 } 2877 2878 bt.push(method, bci, CHECK); 2879 total_count++; 2880 } 2881 2882 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count); 2883 2884 // Put completed stack trace into throwable object 2885 set_backtrace(throwable(), bt.backtrace()); 2886 set_depth(throwable(), total_count); 2887 } 2888 2889 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) { 2890 // No-op if stack trace is disabled 2891 if (!StackTraceInThrowable) { 2892 return; 2893 } 2894 2895 // Disable stack traces for some preallocated out of memory errors 2896 if (!Universe::should_fill_in_stack_trace(throwable)) { 2897 return; 2898 } 2899 2900 JavaThread* THREAD = JavaThread::current(); // For exception macros. 2901 PreserveExceptionMark pm(THREAD); 2902 2903 fill_in_stack_trace(throwable, method, THREAD); 2904 // Ignore exceptions thrown during stack trace filling (OOM) and reinstall the 2905 // original exception via the PreserveExceptionMark destructor. 2906 CLEAR_PENDING_EXCEPTION; 2907 } 2908 2909 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 2910 // Allocate stack trace - backtrace is created but not filled in 2911 2912 // No-op if stack trace is disabled 2913 if (!StackTraceInThrowable) return; 2914 BacktraceBuilder bt(CHECK); // creates a backtrace 2915 set_backtrace(throwable(), bt.backtrace()); 2916 } 2917 2918 2919 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 2920 // Fill in stack trace into preallocated backtrace (no GC) 2921 2922 // No-op if stack trace is disabled 2923 if (!StackTraceInThrowable) return; 2924 2925 assert(throwable->is_a(vmClasses::Throwable_klass()), "sanity check"); 2926 2927 JavaThread* THREAD = JavaThread::current(); // For exception macros. 2928 2929 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable())); 2930 assert(backtrace.not_null(), "backtrace should have been preallocated"); 2931 2932 ResourceMark rm(THREAD); 2933 vframeStream st(THREAD, false /* stop_at_java_call_stub */, false /* process_frames */); 2934 2935 BacktraceBuilder bt(THREAD, backtrace); 2936 2937 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 2938 // methods as preallocated errors aren't created by "java" code. 2939 2940 // fill in as much stack trace as possible 2941 int chunk_count = 0; 2942 for (;!st.at_end(); st.next()) { 2943 bt.push(st.method(), st.bci(), CHECK); 2944 chunk_count++; 2945 2946 // Bail-out for deep stacks 2947 if (chunk_count >= trace_chunk_size) break; 2948 } 2949 set_depth(throwable(), chunk_count); 2950 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count); 2951 2952 // We support the Throwable immutability protocol defined for Java 7. 2953 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace()); 2954 assert(java_lang_Throwable::unassigned_stacktrace() != nullptr, "not initialized"); 2955 } 2956 2957 void java_lang_Throwable::get_stack_trace_elements(int depth, Handle backtrace, 2958 objArrayHandle stack_trace_array_h, TRAPS) { 2959 2960 if (backtrace.is_null() || stack_trace_array_h.is_null()) { 2961 THROW(vmSymbols::java_lang_NullPointerException()); 2962 } 2963 2964 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent"); 2965 2966 if (stack_trace_array_h->length() != depth) { 2967 THROW(vmSymbols::java_lang_IndexOutOfBoundsException()); 2968 } 2969 2970 objArrayHandle result(THREAD, objArrayOop(backtrace())); 2971 BacktraceIterator iter(result, THREAD); 2972 2973 int index = 0; 2974 while (iter.repeat()) { 2975 BacktraceElement bte = iter.next(THREAD); 2976 2977 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++)); 2978 2979 if (stack_trace_element.is_null()) { 2980 THROW(vmSymbols::java_lang_NullPointerException()); 2981 } 2982 2983 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror())); 2984 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version)); 2985 2986 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, 2987 method, 2988 bte._version, 2989 bte._bci, 2990 bte._name, 2991 CHECK); 2992 } 2993 } 2994 2995 Handle java_lang_Throwable::create_initialization_error(JavaThread* current, Handle throwable) { 2996 // Creates an ExceptionInInitializerError to be recorded as the initialization error when class initialization 2997 // failed due to the passed in 'throwable'. We cannot save 'throwable' directly due to issues with keeping alive 2998 // all objects referenced via its stacktrace. So instead we save a new EIIE instance, with the same message and 2999 // symbolic stacktrace of 'throwable'. 3000 assert(throwable.not_null(), "shouldn't be"); 3001 3002 // Now create the message from the original exception and thread name. 3003 ResourceMark rm(current); 3004 const char *message = nullptr; 3005 oop detailed_message = java_lang_Throwable::message(throwable()); 3006 if (detailed_message != nullptr) { 3007 message = java_lang_String::as_utf8_string(detailed_message); 3008 } 3009 stringStream st; 3010 st.print("Exception %s%s ", throwable()->klass()->name()->as_klass_external_name(), 3011 message == nullptr ? "" : ":"); 3012 if (message == nullptr) { 3013 st.print("[in thread \"%s\"]", current->name()); 3014 } else { 3015 st.print("%s [in thread \"%s\"]", message, current->name()); 3016 } 3017 3018 Symbol* exception_name = vmSymbols::java_lang_ExceptionInInitializerError(); 3019 Handle init_error = Exceptions::new_exception(current, exception_name, st.as_string()); 3020 // If new_exception returns a different exception while creating the exception, 3021 // abandon the attempt to save the initialization error and return null. 3022 if (init_error->klass()->name() != exception_name) { 3023 log_info(class, init)("Exception %s thrown while saving initialization exception", 3024 init_error->klass()->external_name()); 3025 return Handle(); 3026 } 3027 3028 // Call to java to fill in the stack trace and clear declaringClassObject to 3029 // not keep classes alive in the stack trace. 3030 // call this: public StackTraceElement[] getStackTrace() 3031 JavaValue result(T_ARRAY); 3032 JavaCalls::call_virtual(&result, throwable, 3033 vmClasses::Throwable_klass(), 3034 vmSymbols::getStackTrace_name(), 3035 vmSymbols::getStackTrace_signature(), 3036 current); 3037 if (!current->has_pending_exception()){ 3038 Handle stack_trace(current, result.get_oop()); 3039 assert(stack_trace->is_objArray(), "Should be an array"); 3040 java_lang_Throwable::set_stacktrace(init_error(), stack_trace()); 3041 // Clear backtrace because the stacktrace should be used instead. 3042 set_backtrace(init_error(), nullptr); 3043 } else { 3044 log_info(class, init)("Exception thrown while getting stack trace for initialization exception %s", 3045 init_error->klass()->external_name()); 3046 current->clear_pending_exception(); 3047 } 3048 3049 return init_error; 3050 } 3051 3052 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) { 3053 JavaThread* current = JavaThread::current(); 3054 objArrayHandle result(current, objArrayOop(backtrace(throwable))); 3055 BacktraceIterator iter(result, current); 3056 // No backtrace available. 3057 if (!iter.repeat()) return false; 3058 3059 // If the exception happened in a frame that has been hidden, i.e., 3060 // omitted from the back trace, we can not compute the message. 3061 oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset); 3062 if (hidden != nullptr) { 3063 return false; 3064 } 3065 3066 // Get first backtrace element. 3067 BacktraceElement bte = iter.next(current); 3068 3069 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror())); 3070 assert(holder != nullptr, "first element should be non-null"); 3071 Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version); 3072 3073 // Original version is no longer available. 3074 if (m == nullptr || !version_matches(m, bte._version)) { 3075 return false; 3076 } 3077 3078 *method = m; 3079 *bci = bte._bci; 3080 return true; 3081 } 3082 3083 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) { 3084 // Allocate java.lang.StackTraceElement instance 3085 InstanceKlass* k = vmClasses::StackTraceElement_klass(); 3086 assert(k != nullptr, "must be loaded in 1.4+"); 3087 if (k->should_be_initialized()) { 3088 k->initialize(CHECK_NULL); 3089 } 3090 3091 Handle element = k->allocate_instance_handle(CHECK_NULL); 3092 3093 int version = method->constants()->version(); 3094 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_NULL); 3095 return element(); 3096 } 3097 3098 void java_lang_StackTraceElement::fill_in(Handle element, 3099 InstanceKlass* holder, const methodHandle& method, 3100 int version, int bci, Symbol* name, TRAPS) { 3101 assert(element->is_a(vmClasses::StackTraceElement_klass()), "sanity check"); 3102 3103 ResourceMark rm(THREAD); 3104 HandleMark hm(THREAD); 3105 3106 // Fill in class name 3107 Handle java_class(THREAD, holder->java_mirror()); 3108 oop classname = java_lang_Class::name(java_class, CHECK); 3109 java_lang_StackTraceElement::set_declaringClass(element(), classname); 3110 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class()); 3111 3112 oop loader = holder->class_loader(); 3113 if (loader != nullptr) { 3114 oop loader_name = java_lang_ClassLoader::name(loader); 3115 if (loader_name != nullptr) 3116 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name); 3117 } 3118 3119 // Fill in method name 3120 oop methodname = StringTable::intern(name, CHECK); 3121 java_lang_StackTraceElement::set_methodName(element(), methodname); 3122 3123 // Fill in module name and version 3124 ModuleEntry* module = holder->module(); 3125 if (module->is_named()) { 3126 oop module_name = StringTable::intern(module->name(), CHECK); 3127 java_lang_StackTraceElement::set_moduleName(element(), module_name); 3128 oop module_version; 3129 if (module->version() != nullptr) { 3130 module_version = StringTable::intern(module->version(), CHECK); 3131 } else { 3132 module_version = nullptr; 3133 } 3134 java_lang_StackTraceElement::set_moduleVersion(element(), module_version); 3135 } 3136 3137 if (method() == nullptr || !version_matches(method(), version)) { 3138 // The method was redefined, accurate line number information isn't available 3139 java_lang_StackTraceElement::set_fileName(element(), nullptr); 3140 java_lang_StackTraceElement::set_lineNumber(element(), -1); 3141 } else { 3142 Symbol* source; 3143 oop source_file; 3144 int line_number; 3145 decode_file_and_line(java_class, holder, version, method, bci, source, source_file, line_number, CHECK); 3146 3147 java_lang_StackTraceElement::set_fileName(element(), source_file); 3148 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 3149 } 3150 } 3151 3152 void java_lang_StackTraceElement::decode_file_and_line(Handle java_class, 3153 InstanceKlass* holder, 3154 int version, 3155 const methodHandle& method, 3156 int bci, 3157 Symbol*& source, 3158 oop& source_file, 3159 int& line_number, TRAPS) { 3160 // Fill in source file name and line number. 3161 source = Backtrace::get_source_file_name(holder, version); 3162 source_file = java_lang_Class::source_file(java_class()); 3163 if (source != nullptr) { 3164 // Class was not redefined. We can trust its cache if set, 3165 // else we have to initialize it. 3166 if (source_file == nullptr) { 3167 source_file = StringTable::intern(source, CHECK); 3168 java_lang_Class::set_source_file(java_class(), source_file); 3169 } 3170 } else { 3171 // Class was redefined. Dump the cache if it was set. 3172 if (source_file != nullptr) { 3173 source_file = nullptr; 3174 java_lang_Class::set_source_file(java_class(), source_file); 3175 } 3176 } 3177 line_number = Backtrace::get_line_number(method(), bci); 3178 } 3179 3180 #if INCLUDE_JVMCI 3181 void java_lang_StackTraceElement::decode(const methodHandle& method, int bci, 3182 Symbol*& filename, int& line_number, TRAPS) { 3183 ResourceMark rm(THREAD); 3184 HandleMark hm(THREAD); 3185 3186 filename = nullptr; 3187 line_number = -1; 3188 3189 oop source_file; 3190 int version = method->constants()->version(); 3191 InstanceKlass* holder = method->method_holder(); 3192 Handle java_class(THREAD, holder->java_mirror()); 3193 decode_file_and_line(java_class, holder, version, method, bci, filename, source_file, line_number, CHECK); 3194 } 3195 #endif // INCLUDE_JVMCI 3196 3197 // java_lang_ClassFrameInfo 3198 3199 int java_lang_ClassFrameInfo::_classOrMemberName_offset; 3200 int java_lang_ClassFrameInfo::_flags_offset; 3201 3202 #define CLASSFRAMEINFO_FIELDS_DO(macro) \ 3203 macro(_classOrMemberName_offset, k, "classOrMemberName", object_signature, false); \ 3204 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false) 3205 3206 void java_lang_ClassFrameInfo::compute_offsets() { 3207 InstanceKlass* k = vmClasses::ClassFrameInfo_klass(); 3208 CLASSFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3209 } 3210 3211 #if INCLUDE_CDS 3212 void java_lang_ClassFrameInfo::serialize_offsets(SerializeClosure* f) { 3213 CLASSFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3214 } 3215 #endif 3216 3217 static int get_flags(const methodHandle& m) { 3218 int flags = m->access_flags().as_method_flags(); 3219 if (m->is_object_initializer()) { 3220 flags |= java_lang_invoke_MemberName::MN_IS_CONSTRUCTOR; 3221 } else { 3222 // Note: Static initializers can be here. Record them as plain methods. 3223 flags |= java_lang_invoke_MemberName::MN_IS_METHOD; 3224 } 3225 if (m->caller_sensitive()) { 3226 flags |= java_lang_invoke_MemberName::MN_CALLER_SENSITIVE; 3227 } 3228 if (m->is_hidden()) { 3229 flags |= java_lang_invoke_MemberName::MN_HIDDEN_MEMBER; 3230 } 3231 assert((flags & 0xFF000000) == 0, "unexpected flags"); 3232 return flags; 3233 } 3234 3235 oop java_lang_ClassFrameInfo::classOrMemberName(oop obj) { 3236 return obj->obj_field(_classOrMemberName_offset); 3237 } 3238 3239 int java_lang_ClassFrameInfo::flags(oop obj) { 3240 return obj->int_field(_flags_offset); 3241 } 3242 3243 void java_lang_ClassFrameInfo::init_class(Handle stackFrame, const methodHandle& m) { 3244 stackFrame->obj_field_put(_classOrMemberName_offset, m->method_holder()->java_mirror()); 3245 // flags is initialized when ClassFrameInfo object is constructed and retain the value 3246 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m); 3247 stackFrame->int_field_put(_flags_offset, flags); 3248 } 3249 3250 void java_lang_ClassFrameInfo::init_method(Handle stackFrame, const methodHandle& m, TRAPS) { 3251 oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(m, CHECK); 3252 stackFrame->obj_field_put(_classOrMemberName_offset, rmethod_name); 3253 // flags is initialized when ClassFrameInfo object is constructed and retain the value 3254 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m); 3255 stackFrame->int_field_put(_flags_offset, flags); 3256 } 3257 3258 3259 // java_lang_StackFrameInfo 3260 3261 int java_lang_StackFrameInfo::_type_offset; 3262 int java_lang_StackFrameInfo::_name_offset; 3263 int java_lang_StackFrameInfo::_bci_offset; 3264 int java_lang_StackFrameInfo::_version_offset; 3265 int java_lang_StackFrameInfo::_contScope_offset; 3266 3267 #define STACKFRAMEINFO_FIELDS_DO(macro) \ 3268 macro(_type_offset, k, "type", object_signature, false); \ 3269 macro(_name_offset, k, "name", string_signature, false); \ 3270 macro(_bci_offset, k, "bci", int_signature, false); \ 3271 macro(_contScope_offset, k, "contScope", continuationscope_signature, false) 3272 3273 void java_lang_StackFrameInfo::compute_offsets() { 3274 InstanceKlass* k = vmClasses::StackFrameInfo_klass(); 3275 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3276 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3277 } 3278 3279 #if INCLUDE_CDS 3280 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) { 3281 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3282 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3283 } 3284 #endif 3285 3286 Method* java_lang_StackFrameInfo::get_method(oop obj) { 3287 oop m = java_lang_ClassFrameInfo::classOrMemberName(obj); 3288 Method* method = java_lang_invoke_ResolvedMethodName::vmtarget(m); 3289 return method; 3290 } 3291 3292 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS) { 3293 // set Method* or mid/cpref 3294 HandleMark hm(THREAD); 3295 Handle cont_h(THREAD, cont); 3296 java_lang_ClassFrameInfo::init_method(stackFrame, method, CHECK); 3297 3298 // set bci 3299 java_lang_StackFrameInfo::set_bci(stackFrame(), bci); 3300 // method may be redefined; store the version 3301 int version = method->constants()->version(); 3302 assert((jushort)version == version, "version should be short"); 3303 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version); 3304 3305 oop contScope = cont_h() != nullptr ? jdk_internal_vm_Continuation::scope(cont_h()) : (oop)nullptr; 3306 java_lang_StackFrameInfo::set_contScope(stackFrame(), contScope); 3307 } 3308 3309 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) { 3310 ResourceMark rm(THREAD); 3311 HandleMark hm(THREAD); 3312 3313 Method* method = java_lang_StackFrameInfo::get_method(stackFrame()); 3314 InstanceKlass* holder = method->method_holder(); 3315 short version = stackFrame->short_field(_version_offset); 3316 int bci = stackFrame->int_field(_bci_offset); 3317 Symbol* name = method->name(); 3318 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, methodHandle(THREAD, method), version, bci, name, CHECK); 3319 } 3320 3321 oop java_lang_StackFrameInfo::type(oop obj) { 3322 return obj->obj_field(_type_offset); 3323 } 3324 3325 void java_lang_StackFrameInfo::set_type(oop obj, oop value) { 3326 obj->obj_field_put(_type_offset, value); 3327 } 3328 3329 oop java_lang_StackFrameInfo::name(oop obj) { 3330 return obj->obj_field(_name_offset); 3331 } 3332 3333 void java_lang_StackFrameInfo::set_name(oop obj, oop value) { 3334 obj->obj_field_put(_name_offset, value); 3335 } 3336 3337 void java_lang_StackFrameInfo::set_version(oop obj, short value) { 3338 obj->short_field_put(_version_offset, value); 3339 } 3340 3341 void java_lang_StackFrameInfo::set_bci(oop obj, int value) { 3342 assert(value >= 0 && value < max_jushort, "must be a valid bci value"); 3343 obj->int_field_put(_bci_offset, value); 3344 } 3345 3346 void java_lang_StackFrameInfo::set_contScope(oop obj, oop value) { 3347 obj->obj_field_put(_contScope_offset, value); 3348 } 3349 3350 int java_lang_LiveStackFrameInfo::_monitors_offset; 3351 int java_lang_LiveStackFrameInfo::_locals_offset; 3352 int java_lang_LiveStackFrameInfo::_operands_offset; 3353 int java_lang_LiveStackFrameInfo::_mode_offset; 3354 3355 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \ 3356 macro(_monitors_offset, k, "monitors", object_array_signature, false); \ 3357 macro(_locals_offset, k, "locals", object_array_signature, false); \ 3358 macro(_operands_offset, k, "operands", object_array_signature, false); \ 3359 macro(_mode_offset, k, "mode", int_signature, false) 3360 3361 void java_lang_LiveStackFrameInfo::compute_offsets() { 3362 InstanceKlass* k = vmClasses::LiveStackFrameInfo_klass(); 3363 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3364 } 3365 3366 #if INCLUDE_CDS 3367 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) { 3368 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3369 } 3370 #endif 3371 3372 void java_lang_LiveStackFrameInfo::set_monitors(oop obj, oop value) { 3373 obj->obj_field_put(_monitors_offset, value); 3374 } 3375 3376 void java_lang_LiveStackFrameInfo::set_locals(oop obj, oop value) { 3377 obj->obj_field_put(_locals_offset, value); 3378 } 3379 3380 void java_lang_LiveStackFrameInfo::set_operands(oop obj, oop value) { 3381 obj->obj_field_put(_operands_offset, value); 3382 } 3383 3384 void java_lang_LiveStackFrameInfo::set_mode(oop obj, int value) { 3385 obj->int_field_put(_mode_offset, value); 3386 } 3387 3388 3389 // java_lang_AccessibleObject 3390 3391 int java_lang_reflect_AccessibleObject::_override_offset; 3392 3393 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \ 3394 macro(_override_offset, k, "override", bool_signature, false) 3395 3396 void java_lang_reflect_AccessibleObject::compute_offsets() { 3397 InstanceKlass* k = vmClasses::reflect_AccessibleObject_klass(); 3398 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3399 } 3400 3401 #if INCLUDE_CDS 3402 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) { 3403 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3404 } 3405 #endif 3406 3407 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 3408 return (jboolean) reflect->bool_field(_override_offset); 3409 } 3410 3411 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 3412 reflect->bool_field_put(_override_offset, (int) value); 3413 } 3414 3415 // java_lang_reflect_Method 3416 3417 int java_lang_reflect_Method::_clazz_offset; 3418 int java_lang_reflect_Method::_name_offset; 3419 int java_lang_reflect_Method::_returnType_offset; 3420 int java_lang_reflect_Method::_parameterTypes_offset; 3421 int java_lang_reflect_Method::_exceptionTypes_offset; 3422 int java_lang_reflect_Method::_slot_offset; 3423 int java_lang_reflect_Method::_modifiers_offset; 3424 int java_lang_reflect_Method::_signature_offset; 3425 int java_lang_reflect_Method::_annotations_offset; 3426 int java_lang_reflect_Method::_parameter_annotations_offset; 3427 int java_lang_reflect_Method::_annotation_default_offset; 3428 3429 #define METHOD_FIELDS_DO(macro) \ 3430 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3431 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3432 macro(_returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \ 3433 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 3434 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 3435 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 3436 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3437 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 3438 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \ 3439 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \ 3440 macro(_annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false); 3441 3442 void java_lang_reflect_Method::compute_offsets() { 3443 InstanceKlass* k = vmClasses::reflect_Method_klass(); 3444 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3445 } 3446 3447 #if INCLUDE_CDS 3448 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) { 3449 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3450 } 3451 #endif 3452 3453 Handle java_lang_reflect_Method::create(TRAPS) { 3454 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3455 Klass* klass = vmClasses::reflect_Method_klass(); 3456 // This class is eagerly initialized during VM initialization, since we keep a reference 3457 // to one of the methods 3458 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized"); 3459 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD); 3460 } 3461 3462 oop java_lang_reflect_Method::clazz(oop reflect) { 3463 return reflect->obj_field(_clazz_offset); 3464 } 3465 3466 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 3467 reflect->obj_field_put(_clazz_offset, value); 3468 } 3469 3470 int java_lang_reflect_Method::slot(oop reflect) { 3471 return reflect->int_field(_slot_offset); 3472 } 3473 3474 void java_lang_reflect_Method::set_slot(oop reflect, int value) { 3475 reflect->int_field_put(_slot_offset, value); 3476 } 3477 3478 void java_lang_reflect_Method::set_name(oop method, oop value) { 3479 method->obj_field_put(_name_offset, value); 3480 } 3481 3482 oop java_lang_reflect_Method::return_type(oop method) { 3483 return method->obj_field(_returnType_offset); 3484 } 3485 3486 void java_lang_reflect_Method::set_return_type(oop method, oop value) { 3487 method->obj_field_put(_returnType_offset, value); 3488 } 3489 3490 oop java_lang_reflect_Method::parameter_types(oop method) { 3491 return method->obj_field(_parameterTypes_offset); 3492 } 3493 3494 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 3495 method->obj_field_put(_parameterTypes_offset, value); 3496 } 3497 3498 void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 3499 method->obj_field_put(_exceptionTypes_offset, value); 3500 } 3501 3502 void java_lang_reflect_Method::set_modifiers(oop method, int value) { 3503 method->int_field_put(_modifiers_offset, value); 3504 } 3505 3506 void java_lang_reflect_Method::set_signature(oop method, oop value) { 3507 method->obj_field_put(_signature_offset, value); 3508 } 3509 3510 void java_lang_reflect_Method::set_annotations(oop method, oop value) { 3511 method->obj_field_put(_annotations_offset, value); 3512 } 3513 3514 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 3515 method->obj_field_put(_parameter_annotations_offset, value); 3516 } 3517 3518 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 3519 method->obj_field_put(_annotation_default_offset, value); 3520 } 3521 3522 int java_lang_reflect_Constructor::_clazz_offset; 3523 int java_lang_reflect_Constructor::_parameterTypes_offset; 3524 int java_lang_reflect_Constructor::_exceptionTypes_offset; 3525 int java_lang_reflect_Constructor::_slot_offset; 3526 int java_lang_reflect_Constructor::_modifiers_offset; 3527 int java_lang_reflect_Constructor::_signature_offset; 3528 int java_lang_reflect_Constructor::_annotations_offset; 3529 int java_lang_reflect_Constructor::_parameter_annotations_offset; 3530 3531 #define CONSTRUCTOR_FIELDS_DO(macro) \ 3532 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3533 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 3534 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 3535 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 3536 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3537 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 3538 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \ 3539 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); 3540 3541 void java_lang_reflect_Constructor::compute_offsets() { 3542 InstanceKlass* k = vmClasses::reflect_Constructor_klass(); 3543 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3544 } 3545 3546 #if INCLUDE_CDS 3547 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) { 3548 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3549 } 3550 #endif 3551 3552 Handle java_lang_reflect_Constructor::create(TRAPS) { 3553 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3554 Symbol* name = vmSymbols::java_lang_reflect_Constructor(); 3555 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3556 InstanceKlass* ik = InstanceKlass::cast(k); 3557 // Ensure it is initialized 3558 ik->initialize(CHECK_NH); 3559 return ik->allocate_instance_handle(THREAD); 3560 } 3561 3562 oop java_lang_reflect_Constructor::clazz(oop reflect) { 3563 return reflect->obj_field(_clazz_offset); 3564 } 3565 3566 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 3567 reflect->obj_field_put(_clazz_offset, value); 3568 } 3569 3570 oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 3571 return constructor->obj_field(_parameterTypes_offset); 3572 } 3573 3574 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 3575 constructor->obj_field_put(_parameterTypes_offset, value); 3576 } 3577 3578 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 3579 constructor->obj_field_put(_exceptionTypes_offset, value); 3580 } 3581 3582 int java_lang_reflect_Constructor::slot(oop reflect) { 3583 return reflect->int_field(_slot_offset); 3584 } 3585 3586 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 3587 reflect->int_field_put(_slot_offset, value); 3588 } 3589 3590 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 3591 constructor->int_field_put(_modifiers_offset, value); 3592 } 3593 3594 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 3595 constructor->obj_field_put(_signature_offset, value); 3596 } 3597 3598 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 3599 constructor->obj_field_put(_annotations_offset, value); 3600 } 3601 3602 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 3603 method->obj_field_put(_parameter_annotations_offset, value); 3604 } 3605 3606 int java_lang_reflect_Field::_clazz_offset; 3607 int java_lang_reflect_Field::_name_offset; 3608 int java_lang_reflect_Field::_type_offset; 3609 int java_lang_reflect_Field::_slot_offset; 3610 int java_lang_reflect_Field::_modifiers_offset; 3611 int java_lang_reflect_Field::_trusted_final_offset; 3612 int java_lang_reflect_Field::_signature_offset; 3613 int java_lang_reflect_Field::_annotations_offset; 3614 3615 #define FIELD_FIELDS_DO(macro) \ 3616 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3617 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3618 macro(_type_offset, k, vmSymbols::type_name(), class_signature, false); \ 3619 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 3620 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3621 macro(_trusted_final_offset, k, vmSymbols::trusted_final_name(), bool_signature, false); \ 3622 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 3623 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); 3624 3625 void java_lang_reflect_Field::compute_offsets() { 3626 InstanceKlass* k = vmClasses::reflect_Field_klass(); 3627 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3628 } 3629 3630 #if INCLUDE_CDS 3631 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) { 3632 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3633 } 3634 #endif 3635 3636 Handle java_lang_reflect_Field::create(TRAPS) { 3637 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3638 Symbol* name = vmSymbols::java_lang_reflect_Field(); 3639 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3640 InstanceKlass* ik = InstanceKlass::cast(k); 3641 // Ensure it is initialized 3642 ik->initialize(CHECK_NH); 3643 return ik->allocate_instance_handle(THREAD); 3644 } 3645 3646 oop java_lang_reflect_Field::clazz(oop reflect) { 3647 return reflect->obj_field(_clazz_offset); 3648 } 3649 3650 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 3651 reflect->obj_field_put(_clazz_offset, value); 3652 } 3653 3654 oop java_lang_reflect_Field::name(oop field) { 3655 return field->obj_field(_name_offset); 3656 } 3657 3658 void java_lang_reflect_Field::set_name(oop field, oop value) { 3659 field->obj_field_put(_name_offset, value); 3660 } 3661 3662 oop java_lang_reflect_Field::type(oop field) { 3663 return field->obj_field(_type_offset); 3664 } 3665 3666 void java_lang_reflect_Field::set_type(oop field, oop value) { 3667 field->obj_field_put(_type_offset, value); 3668 } 3669 3670 int java_lang_reflect_Field::slot(oop reflect) { 3671 return reflect->int_field(_slot_offset); 3672 } 3673 3674 void java_lang_reflect_Field::set_slot(oop reflect, int value) { 3675 reflect->int_field_put(_slot_offset, value); 3676 } 3677 3678 int java_lang_reflect_Field::modifiers(oop field) { 3679 return field->int_field(_modifiers_offset); 3680 } 3681 3682 void java_lang_reflect_Field::set_modifiers(oop field, int value) { 3683 field->int_field_put(_modifiers_offset, value); 3684 } 3685 3686 void java_lang_reflect_Field::set_trusted_final(oop field) { 3687 field->bool_field_put(_trusted_final_offset, true); 3688 } 3689 3690 void java_lang_reflect_Field::set_signature(oop field, oop value) { 3691 field->obj_field_put(_signature_offset, value); 3692 } 3693 3694 void java_lang_reflect_Field::set_annotations(oop field, oop value) { 3695 field->obj_field_put(_annotations_offset, value); 3696 } 3697 3698 oop java_lang_reflect_RecordComponent::create(InstanceKlass* holder, RecordComponent* component, TRAPS) { 3699 // Allocate java.lang.reflect.RecordComponent instance 3700 HandleMark hm(THREAD); 3701 InstanceKlass* ik = vmClasses::RecordComponent_klass(); 3702 assert(ik != nullptr, "must be loaded"); 3703 ik->initialize(CHECK_NULL); 3704 3705 Handle element = ik->allocate_instance_handle(CHECK_NULL); 3706 3707 Handle decl_class(THREAD, holder->java_mirror()); 3708 java_lang_reflect_RecordComponent::set_clazz(element(), decl_class()); 3709 3710 Symbol* name = holder->constants()->symbol_at(component->name_index()); // name_index is a utf8 3711 oop component_name = StringTable::intern(name, CHECK_NULL); 3712 java_lang_reflect_RecordComponent::set_name(element(), component_name); 3713 3714 Symbol* type = holder->constants()->symbol_at(component->descriptor_index()); 3715 Handle component_type_h = 3716 SystemDictionary::find_java_mirror_for_type(type, holder, SignatureStream::NCDFError, CHECK_NULL); 3717 java_lang_reflect_RecordComponent::set_type(element(), component_type_h()); 3718 3719 Method* accessor_method = nullptr; 3720 { 3721 // Prepend "()" to type to create the full method signature. 3722 ResourceMark rm(THREAD); 3723 int sig_len = type->utf8_length() + 3; // "()" and null char 3724 char* sig = NEW_RESOURCE_ARRAY(char, sig_len); 3725 jio_snprintf(sig, sig_len, "%c%c%s", JVM_SIGNATURE_FUNC, JVM_SIGNATURE_ENDFUNC, type->as_C_string()); 3726 TempNewSymbol full_sig = SymbolTable::new_symbol(sig); 3727 accessor_method = holder->find_instance_method(name, full_sig, Klass::PrivateLookupMode::find); 3728 } 3729 3730 if (accessor_method != nullptr) { 3731 methodHandle method(THREAD, accessor_method); 3732 oop m = Reflection::new_method(method, false, CHECK_NULL); 3733 java_lang_reflect_RecordComponent::set_accessor(element(), m); 3734 } else { 3735 java_lang_reflect_RecordComponent::set_accessor(element(), nullptr); 3736 } 3737 3738 int sig_index = component->generic_signature_index(); 3739 if (sig_index > 0) { 3740 Symbol* sig = holder->constants()->symbol_at(sig_index); // sig_index is a utf8 3741 oop component_sig = StringTable::intern(sig, CHECK_NULL); 3742 java_lang_reflect_RecordComponent::set_signature(element(), component_sig); 3743 } else { 3744 java_lang_reflect_RecordComponent::set_signature(element(), nullptr); 3745 } 3746 3747 typeArrayOop annotation_oop = Annotations::make_java_array(component->annotations(), CHECK_NULL); 3748 java_lang_reflect_RecordComponent::set_annotations(element(), annotation_oop); 3749 3750 typeArrayOop type_annotation_oop = Annotations::make_java_array(component->type_annotations(), CHECK_NULL); 3751 java_lang_reflect_RecordComponent::set_typeAnnotations(element(), type_annotation_oop); 3752 3753 return element(); 3754 } 3755 3756 int reflect_ConstantPool::_oop_offset; 3757 3758 #define CONSTANTPOOL_FIELDS_DO(macro) \ 3759 macro(_oop_offset, k, "constantPoolOop", object_signature, false) 3760 3761 void reflect_ConstantPool::compute_offsets() { 3762 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass(); 3763 // The field is called ConstantPool* in the sun.reflect.ConstantPool class. 3764 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3765 } 3766 3767 #if INCLUDE_CDS 3768 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) { 3769 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3770 } 3771 #endif 3772 3773 int java_lang_reflect_Parameter::_name_offset; 3774 int java_lang_reflect_Parameter::_modifiers_offset; 3775 int java_lang_reflect_Parameter::_index_offset; 3776 int java_lang_reflect_Parameter::_executable_offset; 3777 3778 #define PARAMETER_FIELDS_DO(macro) \ 3779 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3780 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3781 macro(_index_offset, k, vmSymbols::index_name(), int_signature, false); \ 3782 macro(_executable_offset, k, vmSymbols::executable_name(), executable_signature, false) 3783 3784 void java_lang_reflect_Parameter::compute_offsets() { 3785 InstanceKlass* k = vmClasses::reflect_Parameter_klass(); 3786 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3787 } 3788 3789 #if INCLUDE_CDS 3790 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) { 3791 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3792 } 3793 #endif 3794 3795 Handle java_lang_reflect_Parameter::create(TRAPS) { 3796 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3797 Symbol* name = vmSymbols::java_lang_reflect_Parameter(); 3798 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3799 InstanceKlass* ik = InstanceKlass::cast(k); 3800 // Ensure it is initialized 3801 ik->initialize(CHECK_NH); 3802 return ik->allocate_instance_handle(THREAD); 3803 } 3804 3805 oop java_lang_reflect_Parameter::name(oop param) { 3806 return param->obj_field(_name_offset); 3807 } 3808 3809 void java_lang_reflect_Parameter::set_name(oop param, oop value) { 3810 param->obj_field_put(_name_offset, value); 3811 } 3812 3813 int java_lang_reflect_Parameter::modifiers(oop param) { 3814 return param->int_field(_modifiers_offset); 3815 } 3816 3817 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) { 3818 param->int_field_put(_modifiers_offset, value); 3819 } 3820 3821 int java_lang_reflect_Parameter::index(oop param) { 3822 return param->int_field(_index_offset); 3823 } 3824 3825 void java_lang_reflect_Parameter::set_index(oop param, int value) { 3826 param->int_field_put(_index_offset, value); 3827 } 3828 3829 oop java_lang_reflect_Parameter::executable(oop param) { 3830 return param->obj_field(_executable_offset); 3831 } 3832 3833 void java_lang_reflect_Parameter::set_executable(oop param, oop value) { 3834 param->obj_field_put(_executable_offset, value); 3835 } 3836 3837 // java_lang_Module 3838 3839 int java_lang_Module::_loader_offset; 3840 int java_lang_Module::_name_offset; 3841 int java_lang_Module::_module_entry_offset; 3842 3843 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) { 3844 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3845 return JavaCalls::construct_new_instance(vmClasses::Module_klass(), 3846 vmSymbols::java_lang_module_init_signature(), 3847 loader, module_name, CHECK_NH); 3848 } 3849 3850 #define MODULE_FIELDS_DO(macro) \ 3851 macro(_loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \ 3852 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false) 3853 3854 void java_lang_Module::compute_offsets() { 3855 InstanceKlass* k = vmClasses::Module_klass(); 3856 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3857 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3858 } 3859 3860 #if INCLUDE_CDS 3861 void java_lang_Module::serialize_offsets(SerializeClosure* f) { 3862 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3863 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3864 } 3865 #endif 3866 3867 oop java_lang_Module::loader(oop module) { 3868 return module->obj_field(_loader_offset); 3869 } 3870 3871 void java_lang_Module::set_loader(oop module, oop value) { 3872 module->obj_field_put(_loader_offset, value); 3873 } 3874 3875 oop java_lang_Module::name(oop module) { 3876 return module->obj_field(_name_offset); 3877 } 3878 3879 void java_lang_Module::set_name(oop module, oop value) { 3880 module->obj_field_put(_name_offset, value); 3881 } 3882 3883 ModuleEntry* java_lang_Module::module_entry_raw(oop module) { 3884 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset"); 3885 assert(module != nullptr, "module can't be null"); 3886 assert(oopDesc::is_oop(module), "module must be oop"); 3887 3888 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset); 3889 return module_entry; 3890 } 3891 3892 ModuleEntry* java_lang_Module::module_entry(oop module) { 3893 ModuleEntry* module_entry = module_entry_raw(module); 3894 if (module_entry == nullptr) { 3895 // If the inject field containing the ModuleEntry* is null then return the 3896 // class loader's unnamed module. 3897 oop loader = java_lang_Module::loader(module); 3898 Handle h_loader = Handle(Thread::current(), loader); 3899 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader); 3900 return loader_cld->unnamed_module(); 3901 } 3902 return module_entry; 3903 } 3904 3905 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) { 3906 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset"); 3907 assert(module != nullptr, "module can't be null"); 3908 assert(oopDesc::is_oop(module), "module must be oop"); 3909 module->address_field_put(_module_entry_offset, (address)module_entry); 3910 } 3911 3912 Handle reflect_ConstantPool::create(TRAPS) { 3913 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3914 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass(); 3915 // Ensure it is initialized 3916 k->initialize(CHECK_NH); 3917 return k->allocate_instance_handle(THREAD); 3918 } 3919 3920 3921 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) { 3922 oop mirror = value->pool_holder()->java_mirror(); 3923 // Save the mirror to get back the constant pool. 3924 reflect->obj_field_put(_oop_offset, mirror); 3925 } 3926 3927 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) { 3928 3929 oop mirror = reflect->obj_field(_oop_offset); 3930 Klass* k = java_lang_Class::as_Klass(mirror); 3931 assert(k->is_instance_klass(), "Must be"); 3932 3933 // Get the constant pool back from the klass. Since class redefinition 3934 // merges the new constant pool into the old, this is essentially the 3935 // same constant pool as the original. If constant pool merging is 3936 // no longer done in the future, this will have to change to save 3937 // the original. 3938 return InstanceKlass::cast(k)->constants(); 3939 } 3940 3941 3942 // Support for java_lang_ref_Reference 3943 3944 bool java_lang_ref_Reference::_offsets_initialized; 3945 3946 int java_lang_ref_Reference::_referent_offset; 3947 int java_lang_ref_Reference::_queue_offset; 3948 int java_lang_ref_Reference::_next_offset; 3949 int java_lang_ref_Reference::_discovered_offset; 3950 3951 #define REFERENCE_FIELDS_DO(macro) \ 3952 macro(_referent_offset, k, "referent", object_signature, false); \ 3953 macro(_queue_offset, k, "queue", referencequeue_signature, false); \ 3954 macro(_next_offset, k, "next", reference_signature, false); \ 3955 macro(_discovered_offset, k, "discovered", reference_signature, false); 3956 3957 void java_lang_ref_Reference::compute_offsets() { 3958 if (_offsets_initialized) { 3959 return; 3960 } 3961 _offsets_initialized = true; 3962 InstanceKlass* k = vmClasses::Reference_klass(); 3963 REFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3964 } 3965 3966 #if INCLUDE_CDS 3967 void java_lang_ref_Reference::serialize_offsets(SerializeClosure* f) { 3968 f->do_bool(&_offsets_initialized); 3969 REFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3970 } 3971 #endif 3972 3973 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) { 3974 assert(obj != nullptr, "sanity"); 3975 if (offset != _referent_offset) { 3976 return false; 3977 } 3978 3979 Klass* k = obj->klass(); 3980 if (!k->is_instance_klass()) { 3981 return false; 3982 } 3983 3984 InstanceKlass* ik = InstanceKlass::cast(obj->klass()); 3985 bool is_reference = ik->reference_type() != REF_NONE; 3986 assert(!is_reference || ik->is_subclass_of(vmClasses::Reference_klass()), "sanity"); 3987 return is_reference; 3988 } 3989 3990 int java_lang_boxing_object::_value_offset; 3991 int java_lang_boxing_object::_long_value_offset; 3992 3993 #define BOXING_FIELDS_DO(macro) \ 3994 macro(_value_offset, integerKlass, "value", int_signature, false); \ 3995 macro(_long_value_offset, longKlass, "value", long_signature, false); 3996 3997 void java_lang_boxing_object::compute_offsets() { 3998 InstanceKlass* integerKlass = vmClasses::Integer_klass(); 3999 InstanceKlass* longKlass = vmClasses::Long_klass(); 4000 BOXING_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4001 } 4002 4003 #if INCLUDE_CDS 4004 void java_lang_boxing_object::serialize_offsets(SerializeClosure* f) { 4005 BOXING_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4006 } 4007 #endif 4008 4009 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 4010 Klass* k = vmClasses::box_klass(type); 4011 if (k == nullptr) return nullptr; 4012 InstanceKlass* ik = InstanceKlass::cast(k); 4013 if (!ik->is_initialized()) { 4014 ik->initialize(CHECK_NULL); 4015 } 4016 return ik->allocate_instance(THREAD); 4017 } 4018 4019 4020 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 4021 oop box = initialize_and_allocate(type, CHECK_NULL); 4022 if (box == nullptr) return nullptr; 4023 switch (type) { 4024 case T_BOOLEAN: 4025 box->bool_field_put(_value_offset, value->z); 4026 break; 4027 case T_CHAR: 4028 box->char_field_put(_value_offset, value->c); 4029 break; 4030 case T_FLOAT: 4031 box->float_field_put(_value_offset, value->f); 4032 break; 4033 case T_DOUBLE: 4034 box->double_field_put(_long_value_offset, value->d); 4035 break; 4036 case T_BYTE: 4037 box->byte_field_put(_value_offset, value->b); 4038 break; 4039 case T_SHORT: 4040 box->short_field_put(_value_offset, value->s); 4041 break; 4042 case T_INT: 4043 box->int_field_put(_value_offset, value->i); 4044 break; 4045 case T_LONG: 4046 box->long_field_put(_long_value_offset, value->j); 4047 break; 4048 default: 4049 return nullptr; 4050 } 4051 return box; 4052 } 4053 4054 4055 BasicType java_lang_boxing_object::basic_type(oop box) { 4056 if (box == nullptr) return T_ILLEGAL; 4057 BasicType type = vmClasses::box_klass_type(box->klass()); 4058 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 4059 return T_ILLEGAL; 4060 return type; 4061 } 4062 4063 4064 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 4065 BasicType type = vmClasses::box_klass_type(box->klass()); 4066 switch (type) { 4067 case T_BOOLEAN: 4068 value->z = box->bool_field(_value_offset); 4069 break; 4070 case T_CHAR: 4071 value->c = box->char_field(_value_offset); 4072 break; 4073 case T_FLOAT: 4074 value->f = box->float_field(_value_offset); 4075 break; 4076 case T_DOUBLE: 4077 value->d = box->double_field(_long_value_offset); 4078 break; 4079 case T_BYTE: 4080 value->b = box->byte_field(_value_offset); 4081 break; 4082 case T_SHORT: 4083 value->s = box->short_field(_value_offset); 4084 break; 4085 case T_INT: 4086 value->i = box->int_field(_value_offset); 4087 break; 4088 case T_LONG: 4089 value->j = box->long_field(_long_value_offset); 4090 break; 4091 default: 4092 return T_ILLEGAL; 4093 } // end switch 4094 return type; 4095 } 4096 4097 4098 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 4099 BasicType type = vmClasses::box_klass_type(box->klass()); 4100 switch (type) { 4101 case T_BOOLEAN: 4102 box->bool_field_put(_value_offset, value->z); 4103 break; 4104 case T_CHAR: 4105 box->char_field_put(_value_offset, value->c); 4106 break; 4107 case T_FLOAT: 4108 box->float_field_put(_value_offset, value->f); 4109 break; 4110 case T_DOUBLE: 4111 box->double_field_put(_long_value_offset, value->d); 4112 break; 4113 case T_BYTE: 4114 box->byte_field_put(_value_offset, value->b); 4115 break; 4116 case T_SHORT: 4117 box->short_field_put(_value_offset, value->s); 4118 break; 4119 case T_INT: 4120 box->int_field_put(_value_offset, value->i); 4121 break; 4122 case T_LONG: 4123 box->long_field_put(_long_value_offset, value->j); 4124 break; 4125 default: 4126 return T_ILLEGAL; 4127 } // end switch 4128 return type; 4129 } 4130 4131 4132 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) { 4133 switch (type) { 4134 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break; 4135 case T_CHAR: st->print("%d", value->c); break; 4136 case T_BYTE: st->print("%d", value->b); break; 4137 case T_SHORT: st->print("%d", value->s); break; 4138 case T_INT: st->print("%d", value->i); break; 4139 case T_LONG: st->print(JLONG_FORMAT, value->j); break; 4140 case T_FLOAT: st->print("%f", value->f); break; 4141 case T_DOUBLE: st->print("%lf", value->d); break; 4142 default: st->print("type %d?", type); break; 4143 } 4144 } 4145 4146 4147 // Support for java_lang_ref_SoftReference 4148 // 4149 4150 int java_lang_ref_SoftReference::_timestamp_offset; 4151 int java_lang_ref_SoftReference::_static_clock_offset; 4152 4153 #define SOFTREFERENCE_FIELDS_DO(macro) \ 4154 macro(_timestamp_offset, k, "timestamp", long_signature, false); \ 4155 macro(_static_clock_offset, k, "clock", long_signature, true) 4156 4157 void java_lang_ref_SoftReference::compute_offsets() { 4158 InstanceKlass* k = vmClasses::SoftReference_klass(); 4159 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4160 } 4161 4162 #if INCLUDE_CDS 4163 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) { 4164 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4165 } 4166 #endif 4167 4168 jlong java_lang_ref_SoftReference::timestamp(oop ref) { 4169 return ref->long_field(_timestamp_offset); 4170 } 4171 4172 jlong java_lang_ref_SoftReference::clock() { 4173 InstanceKlass* ik = vmClasses::SoftReference_klass(); 4174 oop base = ik->static_field_base_raw(); 4175 return base->long_field(_static_clock_offset); 4176 } 4177 4178 void java_lang_ref_SoftReference::set_clock(jlong value) { 4179 InstanceKlass* ik = vmClasses::SoftReference_klass(); 4180 oop base = ik->static_field_base_raw(); 4181 base->long_field_put(_static_clock_offset, value); 4182 } 4183 4184 // Support for java_lang_invoke_DirectMethodHandle 4185 4186 int java_lang_invoke_DirectMethodHandle::_member_offset; 4187 4188 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) { 4189 oop member_name = nullptr; 4190 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh), 4191 "a DirectMethodHandle oop is expected"); 4192 return dmh->obj_field(_member_offset); 4193 } 4194 4195 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \ 4196 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false) 4197 4198 void java_lang_invoke_DirectMethodHandle::compute_offsets() { 4199 InstanceKlass* k = vmClasses::DirectMethodHandle_klass(); 4200 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4201 } 4202 4203 #if INCLUDE_CDS 4204 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) { 4205 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4206 } 4207 #endif 4208 4209 // Support for java_lang_invoke_MethodHandle 4210 4211 int java_lang_invoke_MethodHandle::_type_offset; 4212 int java_lang_invoke_MethodHandle::_form_offset; 4213 4214 int java_lang_invoke_MemberName::_clazz_offset; 4215 int java_lang_invoke_MemberName::_name_offset; 4216 int java_lang_invoke_MemberName::_type_offset; 4217 int java_lang_invoke_MemberName::_flags_offset; 4218 int java_lang_invoke_MemberName::_method_offset; 4219 int java_lang_invoke_MemberName::_vmindex_offset; 4220 4221 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset; 4222 int java_lang_invoke_ResolvedMethodName::_vmholder_offset; 4223 4224 int java_lang_invoke_LambdaForm::_vmentry_offset; 4225 4226 #define METHODHANDLE_FIELDS_DO(macro) \ 4227 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \ 4228 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false) 4229 4230 void java_lang_invoke_MethodHandle::compute_offsets() { 4231 InstanceKlass* k = vmClasses::MethodHandle_klass(); 4232 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4233 } 4234 4235 #if INCLUDE_CDS 4236 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) { 4237 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4238 } 4239 #endif 4240 4241 #define MEMBERNAME_FIELDS_DO(macro) \ 4242 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 4243 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 4244 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \ 4245 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \ 4246 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false) 4247 4248 void java_lang_invoke_MemberName::compute_offsets() { 4249 InstanceKlass* k = vmClasses::MemberName_klass(); 4250 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4251 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4252 } 4253 4254 #if INCLUDE_CDS 4255 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) { 4256 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4257 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4258 } 4259 #endif 4260 4261 #define RESOLVEDMETHOD_FIELDS_DO(macro) \ 4262 macro(_vmholder_offset, k, "vmholder", class_signature, false) 4263 4264 void java_lang_invoke_ResolvedMethodName::compute_offsets() { 4265 InstanceKlass* k = vmClasses::ResolvedMethodName_klass(); 4266 assert(k != nullptr, "jdk mismatch"); 4267 RESOLVEDMETHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4268 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4269 } 4270 4271 #if INCLUDE_CDS 4272 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) { 4273 RESOLVEDMETHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4274 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4275 } 4276 #endif 4277 4278 #define LAMBDAFORM_FIELDS_DO(macro) \ 4279 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false) 4280 4281 void java_lang_invoke_LambdaForm::compute_offsets() { 4282 InstanceKlass* k = vmClasses::LambdaForm_klass(); 4283 assert (k != nullptr, "jdk mismatch"); 4284 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4285 } 4286 4287 #if INCLUDE_CDS 4288 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) { 4289 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4290 } 4291 #endif 4292 4293 bool java_lang_invoke_LambdaForm::is_instance(oop obj) { 4294 return obj != nullptr && is_subclass(obj->klass()); 4295 } 4296 4297 int jdk_internal_foreign_abi_NativeEntryPoint::_method_type_offset; 4298 int jdk_internal_foreign_abi_NativeEntryPoint::_downcall_stub_address_offset; 4299 4300 #define NEP_FIELDS_DO(macro) \ 4301 macro(_method_type_offset, k, "methodType", java_lang_invoke_MethodType_signature, false); \ 4302 macro(_downcall_stub_address_offset, k, "downcallStubAddress", long_signature, false); 4303 4304 bool jdk_internal_foreign_abi_NativeEntryPoint::is_instance(oop obj) { 4305 return obj != nullptr && is_subclass(obj->klass()); 4306 } 4307 4308 void jdk_internal_foreign_abi_NativeEntryPoint::compute_offsets() { 4309 InstanceKlass* k = vmClasses::NativeEntryPoint_klass(); 4310 NEP_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4311 } 4312 4313 #if INCLUDE_CDS 4314 void jdk_internal_foreign_abi_NativeEntryPoint::serialize_offsets(SerializeClosure* f) { 4315 NEP_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4316 } 4317 #endif 4318 4319 oop jdk_internal_foreign_abi_NativeEntryPoint::method_type(oop entry) { 4320 return entry->obj_field(_method_type_offset); 4321 } 4322 4323 jlong jdk_internal_foreign_abi_NativeEntryPoint::downcall_stub_address(oop entry) { 4324 return entry->long_field(_downcall_stub_address_offset); 4325 } 4326 4327 int jdk_internal_foreign_abi_ABIDescriptor::_inputStorage_offset; 4328 int jdk_internal_foreign_abi_ABIDescriptor::_outputStorage_offset; 4329 int jdk_internal_foreign_abi_ABIDescriptor::_volatileStorage_offset; 4330 int jdk_internal_foreign_abi_ABIDescriptor::_stackAlignment_offset; 4331 int jdk_internal_foreign_abi_ABIDescriptor::_shadowSpace_offset; 4332 int jdk_internal_foreign_abi_ABIDescriptor::_scratch1_offset; 4333 int jdk_internal_foreign_abi_ABIDescriptor::_scratch2_offset; 4334 4335 #define ABIDescriptor_FIELDS_DO(macro) \ 4336 macro(_inputStorage_offset, k, "inputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \ 4337 macro(_outputStorage_offset, k, "outputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \ 4338 macro(_volatileStorage_offset, k, "volatileStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \ 4339 macro(_stackAlignment_offset, k, "stackAlignment", int_signature, false); \ 4340 macro(_shadowSpace_offset, k, "shadowSpace", int_signature, false); \ 4341 macro(_scratch1_offset, k, "scratch1", jdk_internal_foreign_abi_VMStorage_signature, false); \ 4342 macro(_scratch2_offset, k, "scratch2", jdk_internal_foreign_abi_VMStorage_signature, false); 4343 4344 bool jdk_internal_foreign_abi_ABIDescriptor::is_instance(oop obj) { 4345 return obj != nullptr && is_subclass(obj->klass()); 4346 } 4347 4348 void jdk_internal_foreign_abi_ABIDescriptor::compute_offsets() { 4349 InstanceKlass* k = vmClasses::ABIDescriptor_klass(); 4350 ABIDescriptor_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4351 } 4352 4353 #if INCLUDE_CDS 4354 void jdk_internal_foreign_abi_ABIDescriptor::serialize_offsets(SerializeClosure* f) { 4355 ABIDescriptor_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4356 } 4357 #endif 4358 4359 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::inputStorage(oop entry) { 4360 return oop_cast<objArrayOop>(entry->obj_field(_inputStorage_offset)); 4361 } 4362 4363 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::outputStorage(oop entry) { 4364 return oop_cast<objArrayOop>(entry->obj_field(_outputStorage_offset)); 4365 } 4366 4367 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::volatileStorage(oop entry) { 4368 return oop_cast<objArrayOop>(entry->obj_field(_volatileStorage_offset)); 4369 } 4370 4371 jint jdk_internal_foreign_abi_ABIDescriptor::stackAlignment(oop entry) { 4372 return entry->int_field(_stackAlignment_offset); 4373 } 4374 4375 jint jdk_internal_foreign_abi_ABIDescriptor::shadowSpace(oop entry) { 4376 return entry->int_field(_shadowSpace_offset); 4377 } 4378 4379 oop jdk_internal_foreign_abi_ABIDescriptor::scratch1(oop entry) { 4380 return entry->obj_field(_scratch1_offset); 4381 } 4382 4383 oop jdk_internal_foreign_abi_ABIDescriptor::scratch2(oop entry) { 4384 return entry->obj_field(_scratch2_offset); 4385 } 4386 4387 int jdk_internal_foreign_abi_VMStorage::_type_offset; 4388 int jdk_internal_foreign_abi_VMStorage::_indexOrOffset_offset; 4389 int jdk_internal_foreign_abi_VMStorage::_segmentMaskOrSize_offset; 4390 int jdk_internal_foreign_abi_VMStorage::_debugName_offset; 4391 4392 #define VMStorage_FIELDS_DO(macro) \ 4393 macro(_type_offset, k, "type", byte_signature, false); \ 4394 macro(_indexOrOffset_offset, k, "indexOrOffset", int_signature, false); \ 4395 macro(_segmentMaskOrSize_offset, k, "segmentMaskOrSize", short_signature, false); \ 4396 macro(_debugName_offset, k, "debugName", string_signature, false); \ 4397 4398 bool jdk_internal_foreign_abi_VMStorage::is_instance(oop obj) { 4399 return obj != nullptr && is_subclass(obj->klass()); 4400 } 4401 4402 void jdk_internal_foreign_abi_VMStorage::compute_offsets() { 4403 InstanceKlass* k = vmClasses::VMStorage_klass(); 4404 VMStorage_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4405 } 4406 4407 #if INCLUDE_CDS 4408 void jdk_internal_foreign_abi_VMStorage::serialize_offsets(SerializeClosure* f) { 4409 VMStorage_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4410 } 4411 #endif 4412 4413 jbyte jdk_internal_foreign_abi_VMStorage::type(oop entry) { 4414 return entry->byte_field(_type_offset); 4415 } 4416 4417 jint jdk_internal_foreign_abi_VMStorage::index_or_offset(oop entry) { 4418 return entry->int_field(_indexOrOffset_offset); 4419 } 4420 4421 jshort jdk_internal_foreign_abi_VMStorage::segment_mask_or_size(oop entry) { 4422 return entry->short_field(_segmentMaskOrSize_offset); 4423 } 4424 4425 oop jdk_internal_foreign_abi_VMStorage::debugName(oop entry) { 4426 return entry->obj_field(_debugName_offset); 4427 } 4428 4429 int jdk_internal_foreign_abi_CallConv::_argRegs_offset; 4430 int jdk_internal_foreign_abi_CallConv::_retRegs_offset; 4431 4432 #define CallConv_FIELDS_DO(macro) \ 4433 macro(_argRegs_offset, k, "argRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \ 4434 macro(_retRegs_offset, k, "retRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \ 4435 4436 bool jdk_internal_foreign_abi_CallConv::is_instance(oop obj) { 4437 return obj != nullptr && is_subclass(obj->klass()); 4438 } 4439 4440 void jdk_internal_foreign_abi_CallConv::compute_offsets() { 4441 InstanceKlass* k = vmClasses::CallConv_klass(); 4442 CallConv_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4443 } 4444 4445 #if INCLUDE_CDS 4446 void jdk_internal_foreign_abi_CallConv::serialize_offsets(SerializeClosure* f) { 4447 CallConv_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4448 } 4449 #endif 4450 4451 objArrayOop jdk_internal_foreign_abi_CallConv::argRegs(oop entry) { 4452 return oop_cast<objArrayOop>(entry->obj_field(_argRegs_offset)); 4453 } 4454 4455 objArrayOop jdk_internal_foreign_abi_CallConv::retRegs(oop entry) { 4456 return oop_cast<objArrayOop>(entry->obj_field(_retRegs_offset)); 4457 } 4458 4459 oop java_lang_invoke_MethodHandle::type(oop mh) { 4460 return mh->obj_field(_type_offset); 4461 } 4462 4463 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) { 4464 mh->obj_field_put(_type_offset, mtype); 4465 } 4466 4467 oop java_lang_invoke_MethodHandle::form(oop mh) { 4468 assert(_form_offset != 0, ""); 4469 return mh->obj_field(_form_offset); 4470 } 4471 4472 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) { 4473 assert(_form_offset != 0, ""); 4474 mh->obj_field_put(_form_offset, lform); 4475 } 4476 4477 /// MemberName accessors 4478 4479 oop java_lang_invoke_MemberName::clazz(oop mname) { 4480 assert(is_instance(mname), "wrong type"); 4481 return mname->obj_field(_clazz_offset); 4482 } 4483 4484 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) { 4485 assert(is_instance(mname), "wrong type"); 4486 mname->obj_field_put(_clazz_offset, clazz); 4487 } 4488 4489 oop java_lang_invoke_MemberName::name(oop mname) { 4490 assert(is_instance(mname), "wrong type"); 4491 return mname->obj_field(_name_offset); 4492 } 4493 4494 void java_lang_invoke_MemberName::set_name(oop mname, oop name) { 4495 assert(is_instance(mname), "wrong type"); 4496 mname->obj_field_put(_name_offset, name); 4497 } 4498 4499 oop java_lang_invoke_MemberName::type(oop mname) { 4500 assert(is_instance(mname), "wrong type"); 4501 return mname->obj_field(_type_offset); 4502 } 4503 4504 void java_lang_invoke_MemberName::set_type(oop mname, oop type) { 4505 assert(is_instance(mname), "wrong type"); 4506 mname->obj_field_put(_type_offset, type); 4507 } 4508 4509 int java_lang_invoke_MemberName::flags(oop mname) { 4510 assert(is_instance(mname), "wrong type"); 4511 return mname->int_field(_flags_offset); 4512 } 4513 4514 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) { 4515 assert(is_instance(mname), "wrong type"); 4516 mname->int_field_put(_flags_offset, flags); 4517 } 4518 4519 4520 // Return vmtarget from ResolvedMethodName method field through indirection 4521 Method* java_lang_invoke_MemberName::vmtarget(oop mname) { 4522 assert(is_instance(mname), "wrong type"); 4523 oop method = mname->obj_field(_method_offset); 4524 return method == nullptr ? nullptr : java_lang_invoke_ResolvedMethodName::vmtarget(method); 4525 } 4526 4527 bool java_lang_invoke_MemberName::is_method(oop mname) { 4528 assert(is_instance(mname), "must be MemberName"); 4529 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0; 4530 } 4531 4532 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) { 4533 assert(is_instance(mname), "wrong type"); 4534 mname->obj_field_put(_method_offset, resolved_method); 4535 } 4536 4537 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) { 4538 assert(is_instance(mname), "wrong type"); 4539 return (intptr_t) mname->address_field(_vmindex_offset); 4540 } 4541 4542 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) { 4543 assert(is_instance(mname), "wrong type"); 4544 mname->address_field_put(_vmindex_offset, (address) index); 4545 } 4546 4547 4548 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) { 4549 assert(is_instance(resolved_method), "wrong type"); 4550 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset); 4551 assert(m->is_method(), "must be"); 4552 return m; 4553 } 4554 4555 // Used by redefinition to change Method* to new Method* with same hash (name, signature) 4556 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) { 4557 assert(is_instance(resolved_method), "wrong type"); 4558 resolved_method->address_field_put(_vmtarget_offset, (address)m); 4559 } 4560 4561 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) { 4562 assert(is_instance(resolved_method), "wrong type"); 4563 resolved_method->obj_field_put(_vmholder_offset, holder); 4564 } 4565 4566 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) { 4567 const Method* method = m(); 4568 4569 // lookup ResolvedMethod oop in the table, or create a new one and intern it 4570 oop resolved_method = ResolvedMethodTable::find_method(method); 4571 if (resolved_method != nullptr) { 4572 return resolved_method; 4573 } 4574 4575 InstanceKlass* k = vmClasses::ResolvedMethodName_klass(); 4576 if (!k->is_initialized()) { 4577 k->initialize(CHECK_NULL); 4578 } 4579 4580 oop new_resolved_method = k->allocate_instance(CHECK_NULL); 4581 4582 NoSafepointVerifier nsv; 4583 4584 if (method->is_old()) { 4585 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() : 4586 method->get_new_method(); 4587 } 4588 4589 InstanceKlass* holder = method->method_holder(); 4590 4591 set_vmtarget(new_resolved_method, const_cast<Method*>(method)); 4592 // Add a reference to the loader (actually mirror because hidden classes may not have 4593 // distinct loaders) to ensure the metadata is kept alive. 4594 // This mirror may be different than the one in clazz field. 4595 set_vmholder(new_resolved_method, holder->java_mirror()); 4596 4597 // Set flag in class to indicate this InstanceKlass has entries in the table 4598 // to avoid walking table during redefinition if none of the redefined classes 4599 // have any membernames in the table. 4600 holder->set_has_resolved_methods(); 4601 4602 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method)); 4603 } 4604 4605 oop java_lang_invoke_LambdaForm::vmentry(oop lform) { 4606 assert(is_instance(lform), "wrong type"); 4607 return lform->obj_field(_vmentry_offset); 4608 } 4609 4610 4611 // Support for java_lang_invoke_MethodType 4612 4613 int java_lang_invoke_MethodType::_rtype_offset; 4614 int java_lang_invoke_MethodType::_ptypes_offset; 4615 4616 #define METHODTYPE_FIELDS_DO(macro) \ 4617 macro(_rtype_offset, k, "rtype", class_signature, false); \ 4618 macro(_ptypes_offset, k, "ptypes", class_array_signature, false) 4619 4620 void java_lang_invoke_MethodType::compute_offsets() { 4621 InstanceKlass* k = vmClasses::MethodType_klass(); 4622 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4623 } 4624 4625 #if INCLUDE_CDS 4626 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) { 4627 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4628 } 4629 #endif 4630 4631 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) { 4632 st->print("("); 4633 objArrayOop pts = ptypes(mt); 4634 if (pts != nullptr) { 4635 for (int i = 0, limit = pts->length(); i < limit; i++) { 4636 java_lang_Class::print_signature(pts->obj_at(i), st); 4637 } 4638 } else { 4639 st->print("null"); 4640 } 4641 st->print(")"); 4642 oop rt = rtype(mt); 4643 if (rt != nullptr) { 4644 java_lang_Class::print_signature(rt, st); 4645 } else { 4646 st->print("null"); 4647 } 4648 } 4649 4650 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) { 4651 ResourceMark rm; 4652 stringStream buffer(128); 4653 print_signature(mt, &buffer); 4654 const char* sigstr = buffer.base(); 4655 int siglen = (int) buffer.size(); 4656 Symbol *name; 4657 if (!intern_if_not_found) { 4658 name = SymbolTable::probe(sigstr, siglen); 4659 } else { 4660 name = SymbolTable::new_symbol(sigstr, siglen); 4661 } 4662 return name; 4663 } 4664 4665 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) { 4666 if (mt1 == mt2) 4667 return true; 4668 if (rtype(mt1) != rtype(mt2)) 4669 return false; 4670 if (ptype_count(mt1) != ptype_count(mt2)) 4671 return false; 4672 for (int i = ptype_count(mt1) - 1; i >= 0; i--) { 4673 if (ptype(mt1, i) != ptype(mt2, i)) 4674 return false; 4675 } 4676 return true; 4677 } 4678 4679 oop java_lang_invoke_MethodType::rtype(oop mt) { 4680 assert(is_instance(mt), "must be a MethodType"); 4681 return mt->obj_field(_rtype_offset); 4682 } 4683 4684 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) { 4685 assert(is_instance(mt), "must be a MethodType"); 4686 return (objArrayOop) mt->obj_field(_ptypes_offset); 4687 } 4688 4689 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) { 4690 return ptypes(mt)->obj_at(idx); 4691 } 4692 4693 int java_lang_invoke_MethodType::ptype_count(oop mt) { 4694 return ptypes(mt)->length(); 4695 } 4696 4697 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) { 4698 objArrayOop pts = ptypes(mt); 4699 int count = pts->length(); 4700 int slots = 0; 4701 for (int i = 0; i < count; i++) { 4702 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i)); 4703 slots += type2size[bt]; 4704 } 4705 return slots; 4706 } 4707 4708 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) { 4709 BasicType bt = java_lang_Class::as_BasicType(rtype(mt)); 4710 return type2size[bt]; 4711 } 4712 4713 4714 // Support for java_lang_invoke_CallSite 4715 4716 int java_lang_invoke_CallSite::_target_offset; 4717 int java_lang_invoke_CallSite::_vmdependencies_offset; 4718 int java_lang_invoke_CallSite::_last_cleanup_offset; 4719 4720 #define CALLSITE_FIELDS_DO(macro) \ 4721 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \ 4722 4723 void java_lang_invoke_CallSite::compute_offsets() { 4724 InstanceKlass* k = vmClasses::CallSite_klass(); 4725 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4726 CALLSITE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4727 } 4728 4729 #if INCLUDE_CDS 4730 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) { 4731 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4732 CALLSITE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4733 } 4734 #endif 4735 4736 DependencyContext java_lang_invoke_CallSite::vmdependencies(oop call_site) { 4737 assert(java_lang_invoke_CallSite::is_instance(call_site), ""); 4738 nmethodBucket* volatile* vmdeps_addr = call_site->field_addr<nmethodBucket* volatile>(_vmdependencies_offset); 4739 volatile uint64_t* last_cleanup_addr = call_site->field_addr<volatile uint64_t>(_last_cleanup_offset); 4740 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr); 4741 return dep_ctx; 4742 } 4743 4744 // Support for java_lang_invoke_ConstantCallSite 4745 4746 int java_lang_invoke_ConstantCallSite::_is_frozen_offset; 4747 4748 #define CONSTANTCALLSITE_FIELDS_DO(macro) \ 4749 macro(_is_frozen_offset, k, "isFrozen", bool_signature, false) 4750 4751 void java_lang_invoke_ConstantCallSite::compute_offsets() { 4752 InstanceKlass* k = vmClasses::ConstantCallSite_klass(); 4753 CONSTANTCALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4754 } 4755 4756 #if INCLUDE_CDS 4757 void java_lang_invoke_ConstantCallSite::serialize_offsets(SerializeClosure* f) { 4758 CONSTANTCALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4759 } 4760 #endif 4761 4762 // Support for java_lang_ClassLoader 4763 4764 int java_lang_ClassLoader::_loader_data_offset; 4765 int java_lang_ClassLoader::_parallelCapable_offset; 4766 int java_lang_ClassLoader::_name_offset; 4767 int java_lang_ClassLoader::_nameAndId_offset; 4768 int java_lang_ClassLoader::_unnamedModule_offset; 4769 int java_lang_ClassLoader::_parent_offset; 4770 4771 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) { 4772 assert(loader != nullptr, "loader must not be null"); 4773 assert(oopDesc::is_oop(loader), "loader must be oop"); 4774 return Atomic::load_acquire(loader->field_addr<ClassLoaderData*>(_loader_data_offset)); 4775 } 4776 4777 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) { 4778 assert(loader != nullptr, "loader must not be null"); 4779 assert(oopDesc::is_oop(loader), "loader must be oop"); 4780 return *loader->field_addr<ClassLoaderData*>(_loader_data_offset); 4781 } 4782 4783 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) { 4784 assert(loader != nullptr, "loader must not be null"); 4785 assert(oopDesc::is_oop(loader), "loader must be oop"); 4786 Atomic::release_store(loader->field_addr<ClassLoaderData*>(_loader_data_offset), new_data); 4787 } 4788 4789 #define CLASSLOADER_FIELDS_DO(macro) \ 4790 macro(_parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \ 4791 macro(_name_offset, k1, vmSymbols::name_name(), string_signature, false); \ 4792 macro(_nameAndId_offset, k1, "nameAndId", string_signature, false); \ 4793 macro(_unnamedModule_offset, k1, "unnamedModule", module_signature, false); \ 4794 macro(_parent_offset, k1, "parent", classloader_signature, false) 4795 4796 void java_lang_ClassLoader::compute_offsets() { 4797 InstanceKlass* k1 = vmClasses::ClassLoader_klass(); 4798 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4799 4800 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4801 } 4802 4803 #if INCLUDE_CDS 4804 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) { 4805 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4806 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4807 } 4808 #endif 4809 4810 oop java_lang_ClassLoader::parent(oop loader) { 4811 assert(is_instance(loader), "loader must be oop"); 4812 return loader->obj_field(_parent_offset); 4813 } 4814 4815 oop java_lang_ClassLoader::parent_no_keepalive(oop loader) { 4816 assert(is_instance(loader), "loader must be oop"); 4817 return loader->obj_field_access<AS_NO_KEEPALIVE>(_parent_offset); 4818 } 4819 4820 // Returns the name field of this class loader. If the name field has not 4821 // been set, null will be returned. 4822 oop java_lang_ClassLoader::name(oop loader) { 4823 assert(is_instance(loader), "loader must be oop"); 4824 return loader->obj_field(_name_offset); 4825 } 4826 4827 // Returns the nameAndId field of this class loader. The format is 4828 // as follows: 4829 // If the defining loader has a name explicitly set then '<loader-name>' @<id> 4830 // If the defining loader has no name then <qualified-class-name> @<id> 4831 // If built-in loader, then omit '@<id>' as there is only one instance. 4832 // Use ClassLoader::loader_name_id() to obtain this String as a char*. 4833 oop java_lang_ClassLoader::nameAndId(oop loader) { 4834 assert(is_instance(loader), "loader must be oop"); 4835 return loader->obj_field(_nameAndId_offset); 4836 } 4837 4838 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) { 4839 assert(is_instance(loader), "loader must be oop"); 4840 assert(cl == nullptr || is_instance(cl), "cl argument must be oop"); 4841 oop acl = loader; 4842 DEBUG_ONLY(jint loop_count = 0); 4843 // This loop taken verbatim from ClassLoader.java: 4844 do { 4845 acl = parent(acl); 4846 if (cl == acl) { 4847 return true; 4848 } 4849 assert(++loop_count > 0, "loop_count overflow"); 4850 } while (acl != nullptr); 4851 return false; 4852 } 4853 4854 bool java_lang_ClassLoader::is_instance(oop obj) { 4855 return obj != nullptr && is_subclass(obj->klass()); 4856 } 4857 4858 4859 // For class loader classes, parallelCapable defined 4860 // based on non-null field 4861 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it 4862 bool java_lang_ClassLoader::parallelCapable(oop class_loader) { 4863 assert(_parallelCapable_offset != 0, "offsets should have been initialized"); 4864 return (class_loader->obj_field(_parallelCapable_offset) != nullptr); 4865 } 4866 4867 bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 4868 oop cl = SystemDictionary::java_system_loader(); 4869 while(cl != nullptr) { 4870 if (cl == loader) return true; 4871 cl = parent(cl); 4872 } 4873 return false; 4874 } 4875 4876 oop java_lang_ClassLoader::unnamedModule(oop loader) { 4877 assert(is_instance(loader), "loader must be oop"); 4878 return loader->obj_field(_unnamedModule_offset); 4879 } 4880 4881 // Support for java_lang_System 4882 // 4883 4884 int java_lang_System::_static_in_offset; 4885 int java_lang_System::_static_out_offset; 4886 int java_lang_System::_static_err_offset; 4887 4888 #define SYSTEM_FIELDS_DO(macro) \ 4889 macro(_static_in_offset, k, "in", input_stream_signature, true); \ 4890 macro(_static_out_offset, k, "out", print_stream_signature, true); \ 4891 macro(_static_err_offset, k, "err", print_stream_signature, true); 4892 4893 void java_lang_System::compute_offsets() { 4894 InstanceKlass* k = vmClasses::System_klass(); 4895 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4896 } 4897 4898 #if INCLUDE_CDS 4899 void java_lang_System::serialize_offsets(SerializeClosure* f) { 4900 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4901 } 4902 #endif 4903 4904 // Support for jdk_internal_misc_UnsafeConstants 4905 // 4906 class UnsafeConstantsFixup : public FieldClosure { 4907 private: 4908 int _address_size; 4909 int _page_size; 4910 bool _big_endian; 4911 bool _use_unaligned_access; 4912 int _data_cache_line_flush_size; 4913 public: 4914 UnsafeConstantsFixup() { 4915 // round up values for all static final fields 4916 _address_size = sizeof(void*); 4917 _page_size = AIX_ONLY(sysconf(_SC_PAGESIZE)) NOT_AIX((int)os::vm_page_size()); 4918 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true); 4919 _use_unaligned_access = UseUnalignedAccesses; 4920 _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size(); 4921 } 4922 4923 void do_field(fieldDescriptor* fd) { 4924 oop mirror = fd->field_holder()->java_mirror(); 4925 assert(mirror != nullptr, "UnsafeConstants must have mirror already"); 4926 assert(fd->field_holder() == vmClasses::UnsafeConstants_klass(), "Should be UnsafeConstants"); 4927 assert(fd->is_final(), "fields of UnsafeConstants must be final"); 4928 assert(fd->is_static(), "fields of UnsafeConstants must be static"); 4929 if (fd->name() == vmSymbols::address_size_name()) { 4930 mirror->int_field_put(fd->offset(), _address_size); 4931 } else if (fd->name() == vmSymbols::page_size_name()) { 4932 mirror->int_field_put(fd->offset(), _page_size); 4933 } else if (fd->name() == vmSymbols::big_endian_name()) { 4934 mirror->bool_field_put(fd->offset(), _big_endian); 4935 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) { 4936 mirror->bool_field_put(fd->offset(), _use_unaligned_access); 4937 } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) { 4938 mirror->int_field_put(fd->offset(), _data_cache_line_flush_size); 4939 } else { 4940 assert(false, "unexpected UnsafeConstants field"); 4941 } 4942 } 4943 }; 4944 4945 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() { 4946 UnsafeConstantsFixup fixup; 4947 vmClasses::UnsafeConstants_klass()->do_local_static_fields(&fixup); 4948 } 4949 4950 4951 // java_lang_StackTraceElement 4952 4953 int java_lang_StackTraceElement::_methodName_offset; 4954 int java_lang_StackTraceElement::_fileName_offset; 4955 int java_lang_StackTraceElement::_lineNumber_offset; 4956 int java_lang_StackTraceElement::_moduleName_offset; 4957 int java_lang_StackTraceElement::_moduleVersion_offset; 4958 int java_lang_StackTraceElement::_classLoaderName_offset; 4959 int java_lang_StackTraceElement::_declaringClass_offset; 4960 int java_lang_StackTraceElement::_declaringClassObject_offset; 4961 4962 #define STACKTRACEELEMENT_FIELDS_DO(macro) \ 4963 macro(_declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \ 4964 macro(_classLoaderName_offset, k, "classLoaderName", string_signature, false); \ 4965 macro(_moduleName_offset, k, "moduleName", string_signature, false); \ 4966 macro(_moduleVersion_offset, k, "moduleVersion", string_signature, false); \ 4967 macro(_declaringClass_offset, k, "declaringClass", string_signature, false); \ 4968 macro(_methodName_offset, k, "methodName", string_signature, false); \ 4969 macro(_fileName_offset, k, "fileName", string_signature, false); \ 4970 macro(_lineNumber_offset, k, "lineNumber", int_signature, false) 4971 4972 // Support for java_lang_StackTraceElement 4973 void java_lang_StackTraceElement::compute_offsets() { 4974 InstanceKlass* k = vmClasses::StackTraceElement_klass(); 4975 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4976 } 4977 4978 #if INCLUDE_CDS 4979 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) { 4980 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4981 } 4982 #endif 4983 4984 void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 4985 element->obj_field_put(_fileName_offset, value); 4986 } 4987 4988 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 4989 element->obj_field_put(_declaringClass_offset, value); 4990 } 4991 4992 void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 4993 element->obj_field_put(_methodName_offset, value); 4994 } 4995 4996 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 4997 element->int_field_put(_lineNumber_offset, value); 4998 } 4999 5000 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) { 5001 element->obj_field_put(_moduleName_offset, value); 5002 } 5003 5004 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) { 5005 element->obj_field_put(_moduleVersion_offset, value); 5006 } 5007 5008 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) { 5009 element->obj_field_put(_classLoaderName_offset, value); 5010 } 5011 5012 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) { 5013 element->obj_field_put(_declaringClassObject_offset, value); 5014 } 5015 5016 5017 // java_lang_AssertionStatusDirectives 5018 5019 int java_lang_AssertionStatusDirectives::_classes_offset; 5020 int java_lang_AssertionStatusDirectives::_classEnabled_offset; 5021 int java_lang_AssertionStatusDirectives::_packages_offset; 5022 int java_lang_AssertionStatusDirectives::_packageEnabled_offset; 5023 int java_lang_AssertionStatusDirectives::_deflt_offset; 5024 5025 // Support for java Assertions - java_lang_AssertionStatusDirectives. 5026 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \ 5027 macro(_classes_offset, k, "classes", string_array_signature, false); \ 5028 macro(_classEnabled_offset, k, "classEnabled", bool_array_signature, false); \ 5029 macro(_packages_offset, k, "packages", string_array_signature, false); \ 5030 macro(_packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \ 5031 macro(_deflt_offset, k, "deflt", bool_signature, false) 5032 5033 void java_lang_AssertionStatusDirectives::compute_offsets() { 5034 InstanceKlass* k = vmClasses::AssertionStatusDirectives_klass(); 5035 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5036 } 5037 5038 #if INCLUDE_CDS 5039 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) { 5040 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5041 } 5042 #endif 5043 5044 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 5045 o->obj_field_put(_classes_offset, val); 5046 } 5047 5048 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 5049 o->obj_field_put(_classEnabled_offset, val); 5050 } 5051 5052 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 5053 o->obj_field_put(_packages_offset, val); 5054 } 5055 5056 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 5057 o->obj_field_put(_packageEnabled_offset, val); 5058 } 5059 5060 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 5061 o->bool_field_put(_deflt_offset, val); 5062 } 5063 5064 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset; 5065 5066 #define AOS_FIELDS_DO(macro) \ 5067 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false) 5068 5069 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() { 5070 InstanceKlass* k = vmClasses::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass(); 5071 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5072 } 5073 5074 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 5075 assert(_owner_offset != 0, "Must be initialized"); 5076 return obj->obj_field(_owner_offset); 5077 } 5078 5079 #if INCLUDE_CDS 5080 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) { 5081 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5082 } 5083 #endif 5084 5085 int vector_VectorPayload::_payload_offset; 5086 5087 #define VECTORPAYLOAD_FIELDS_DO(macro) \ 5088 macro(_payload_offset, k, "payload", object_signature, false) 5089 5090 void vector_VectorPayload::compute_offsets() { 5091 InstanceKlass* k = vmClasses::vector_VectorPayload_klass(); 5092 VECTORPAYLOAD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5093 } 5094 5095 #if INCLUDE_CDS 5096 void vector_VectorPayload::serialize_offsets(SerializeClosure* f) { 5097 VECTORPAYLOAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5098 } 5099 #endif 5100 5101 void vector_VectorPayload::set_payload(oop o, oop val) { 5102 o->obj_field_put(_payload_offset, val); 5103 } 5104 5105 bool vector_VectorPayload::is_instance(oop obj) { 5106 return obj != nullptr && is_subclass(obj->klass()); 5107 } 5108 5109 int java_lang_Integer_IntegerCache::_static_cache_offset; 5110 int java_lang_Long_LongCache::_static_cache_offset; 5111 int java_lang_Character_CharacterCache::_static_cache_offset; 5112 int java_lang_Short_ShortCache::_static_cache_offset; 5113 int java_lang_Byte_ByteCache::_static_cache_offset; 5114 5115 #define INTEGER_CACHE_FIELDS_DO(macro) \ 5116 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true) 5117 5118 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) { 5119 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5120 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5121 } 5122 5123 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) { 5124 oop base = ik->static_field_base_raw(); 5125 return objArrayOop(base->obj_field(_static_cache_offset)); 5126 } 5127 5128 Symbol* java_lang_Integer_IntegerCache::symbol() { 5129 return vmSymbols::java_lang_Integer_IntegerCache(); 5130 } 5131 5132 #if INCLUDE_CDS 5133 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) { 5134 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5135 } 5136 #endif 5137 #undef INTEGER_CACHE_FIELDS_DO 5138 5139 jint java_lang_Integer::value(oop obj) { 5140 jvalue v; 5141 java_lang_boxing_object::get_value(obj, &v); 5142 return v.i; 5143 } 5144 5145 #define LONG_CACHE_FIELDS_DO(macro) \ 5146 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true) 5147 5148 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) { 5149 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5150 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5151 } 5152 5153 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) { 5154 oop base = ik->static_field_base_raw(); 5155 return objArrayOop(base->obj_field(_static_cache_offset)); 5156 } 5157 5158 Symbol* java_lang_Long_LongCache::symbol() { 5159 return vmSymbols::java_lang_Long_LongCache(); 5160 } 5161 5162 #if INCLUDE_CDS 5163 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) { 5164 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5165 } 5166 #endif 5167 #undef LONG_CACHE_FIELDS_DO 5168 5169 jlong java_lang_Long::value(oop obj) { 5170 jvalue v; 5171 java_lang_boxing_object::get_value(obj, &v); 5172 return v.j; 5173 } 5174 5175 #define CHARACTER_CACHE_FIELDS_DO(macro) \ 5176 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true) 5177 5178 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) { 5179 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5180 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5181 } 5182 5183 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) { 5184 oop base = ik->static_field_base_raw(); 5185 return objArrayOop(base->obj_field(_static_cache_offset)); 5186 } 5187 5188 Symbol* java_lang_Character_CharacterCache::symbol() { 5189 return vmSymbols::java_lang_Character_CharacterCache(); 5190 } 5191 5192 #if INCLUDE_CDS 5193 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) { 5194 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5195 } 5196 #endif 5197 #undef CHARACTER_CACHE_FIELDS_DO 5198 5199 jchar java_lang_Character::value(oop obj) { 5200 jvalue v; 5201 java_lang_boxing_object::get_value(obj, &v); 5202 return v.c; 5203 } 5204 5205 #define SHORT_CACHE_FIELDS_DO(macro) \ 5206 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true) 5207 5208 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) { 5209 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5210 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5211 } 5212 5213 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) { 5214 oop base = ik->static_field_base_raw(); 5215 return objArrayOop(base->obj_field(_static_cache_offset)); 5216 } 5217 5218 Symbol* java_lang_Short_ShortCache::symbol() { 5219 return vmSymbols::java_lang_Short_ShortCache(); 5220 } 5221 5222 #if INCLUDE_CDS 5223 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) { 5224 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5225 } 5226 #endif 5227 #undef SHORT_CACHE_FIELDS_DO 5228 5229 jshort java_lang_Short::value(oop obj) { 5230 jvalue v; 5231 java_lang_boxing_object::get_value(obj, &v); 5232 return v.s; 5233 } 5234 5235 #define BYTE_CACHE_FIELDS_DO(macro) \ 5236 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true) 5237 5238 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) { 5239 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5240 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5241 } 5242 5243 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) { 5244 oop base = ik->static_field_base_raw(); 5245 return objArrayOop(base->obj_field(_static_cache_offset)); 5246 } 5247 5248 Symbol* java_lang_Byte_ByteCache::symbol() { 5249 return vmSymbols::java_lang_Byte_ByteCache(); 5250 } 5251 5252 #if INCLUDE_CDS 5253 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) { 5254 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5255 } 5256 #endif 5257 #undef BYTE_CACHE_FIELDS_DO 5258 5259 jbyte java_lang_Byte::value(oop obj) { 5260 jvalue v; 5261 java_lang_boxing_object::get_value(obj, &v); 5262 return v.b; 5263 } 5264 5265 int java_lang_Boolean::_static_TRUE_offset; 5266 int java_lang_Boolean::_static_FALSE_offset; 5267 5268 #define BOOLEAN_FIELDS_DO(macro) \ 5269 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \ 5270 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true) 5271 5272 5273 void java_lang_Boolean::compute_offsets(InstanceKlass *k) { 5274 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5275 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5276 } 5277 5278 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) { 5279 oop base = ik->static_field_base_raw(); 5280 return base->obj_field(_static_TRUE_offset); 5281 } 5282 5283 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) { 5284 oop base = ik->static_field_base_raw(); 5285 return base->obj_field(_static_FALSE_offset); 5286 } 5287 5288 Symbol* java_lang_Boolean::symbol() { 5289 return vmSymbols::java_lang_Boolean(); 5290 } 5291 5292 #if INCLUDE_CDS 5293 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) { 5294 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5295 } 5296 #endif 5297 #undef BOOLEAN_CACHE_FIELDS_DO 5298 5299 jboolean java_lang_Boolean::value(oop obj) { 5300 jvalue v; 5301 java_lang_boxing_object::get_value(obj, &v); 5302 return v.z; 5303 } 5304 5305 // java_lang_reflect_RecordComponent 5306 5307 int java_lang_reflect_RecordComponent::_clazz_offset; 5308 int java_lang_reflect_RecordComponent::_name_offset; 5309 int java_lang_reflect_RecordComponent::_type_offset; 5310 int java_lang_reflect_RecordComponent::_accessor_offset; 5311 int java_lang_reflect_RecordComponent::_signature_offset; 5312 int java_lang_reflect_RecordComponent::_annotations_offset; 5313 int java_lang_reflect_RecordComponent::_typeAnnotations_offset; 5314 5315 #define RECORDCOMPONENT_FIELDS_DO(macro) \ 5316 macro(_clazz_offset, k, "clazz", class_signature, false); \ 5317 macro(_name_offset, k, "name", string_signature, false); \ 5318 macro(_type_offset, k, "type", class_signature, false); \ 5319 macro(_accessor_offset, k, "accessor", reflect_method_signature, false); \ 5320 macro(_signature_offset, k, "signature", string_signature, false); \ 5321 macro(_annotations_offset, k, "annotations", byte_array_signature, false); \ 5322 macro(_typeAnnotations_offset, k, "typeAnnotations", byte_array_signature, false); 5323 5324 // Support for java_lang_reflect_RecordComponent 5325 void java_lang_reflect_RecordComponent::compute_offsets() { 5326 InstanceKlass* k = vmClasses::RecordComponent_klass(); 5327 RECORDCOMPONENT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5328 } 5329 5330 #if INCLUDE_CDS 5331 void java_lang_reflect_RecordComponent::serialize_offsets(SerializeClosure* f) { 5332 RECORDCOMPONENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5333 } 5334 #endif 5335 5336 void java_lang_reflect_RecordComponent::set_clazz(oop element, oop value) { 5337 element->obj_field_put(_clazz_offset, value); 5338 } 5339 5340 void java_lang_reflect_RecordComponent::set_name(oop element, oop value) { 5341 element->obj_field_put(_name_offset, value); 5342 } 5343 5344 void java_lang_reflect_RecordComponent::set_type(oop element, oop value) { 5345 element->obj_field_put(_type_offset, value); 5346 } 5347 5348 void java_lang_reflect_RecordComponent::set_accessor(oop element, oop value) { 5349 element->obj_field_put(_accessor_offset, value); 5350 } 5351 5352 void java_lang_reflect_RecordComponent::set_signature(oop element, oop value) { 5353 element->obj_field_put(_signature_offset, value); 5354 } 5355 5356 void java_lang_reflect_RecordComponent::set_annotations(oop element, oop value) { 5357 element->obj_field_put(_annotations_offset, value); 5358 } 5359 5360 void java_lang_reflect_RecordComponent::set_typeAnnotations(oop element, oop value) { 5361 element->obj_field_put(_typeAnnotations_offset, value); 5362 } 5363 5364 // java_lang_InternalError 5365 int java_lang_InternalError::_during_unsafe_access_offset; 5366 5367 void java_lang_InternalError::set_during_unsafe_access(oop internal_error) { 5368 internal_error->bool_field_put(_during_unsafe_access_offset, true); 5369 } 5370 5371 jboolean java_lang_InternalError::during_unsafe_access(oop internal_error) { 5372 return internal_error->bool_field(_during_unsafe_access_offset); 5373 } 5374 5375 void java_lang_InternalError::compute_offsets() { 5376 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 5377 } 5378 5379 #if INCLUDE_CDS 5380 void java_lang_InternalError::serialize_offsets(SerializeClosure* f) { 5381 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 5382 } 5383 #endif 5384 5385 #define BASIC_JAVA_CLASSES_DO_PART1(f) \ 5386 f(java_lang_Class) \ 5387 f(java_lang_String) \ 5388 f(java_lang_ref_Reference) \ 5389 //end 5390 5391 #define BASIC_JAVA_CLASSES_DO_PART2(f) \ 5392 f(java_lang_System) \ 5393 f(java_lang_ClassLoader) \ 5394 f(java_lang_Throwable) \ 5395 f(java_lang_Thread) \ 5396 f(java_lang_Thread_FieldHolder) \ 5397 f(java_lang_Thread_Constants) \ 5398 f(java_lang_ThreadGroup) \ 5399 f(java_lang_VirtualThread) \ 5400 f(java_lang_InternalError) \ 5401 f(java_lang_AssertionStatusDirectives) \ 5402 f(java_lang_ref_SoftReference) \ 5403 f(java_lang_invoke_MethodHandle) \ 5404 f(java_lang_invoke_DirectMethodHandle) \ 5405 f(java_lang_invoke_MemberName) \ 5406 f(java_lang_invoke_ResolvedMethodName) \ 5407 f(java_lang_invoke_LambdaForm) \ 5408 f(java_lang_invoke_MethodType) \ 5409 f(java_lang_invoke_CallSite) \ 5410 f(java_lang_invoke_ConstantCallSite) \ 5411 f(java_lang_reflect_AccessibleObject) \ 5412 f(java_lang_reflect_Method) \ 5413 f(java_lang_reflect_Constructor) \ 5414 f(java_lang_reflect_Field) \ 5415 f(java_lang_reflect_RecordComponent) \ 5416 f(reflect_ConstantPool) \ 5417 f(java_lang_reflect_Parameter) \ 5418 f(java_lang_Module) \ 5419 f(java_lang_StackTraceElement) \ 5420 f(java_lang_ClassFrameInfo) \ 5421 f(java_lang_StackFrameInfo) \ 5422 f(java_lang_LiveStackFrameInfo) \ 5423 f(jdk_internal_vm_ContinuationScope) \ 5424 f(jdk_internal_vm_Continuation) \ 5425 f(jdk_internal_vm_StackChunk) \ 5426 f(java_util_concurrent_locks_AbstractOwnableSynchronizer) \ 5427 f(jdk_internal_foreign_abi_NativeEntryPoint) \ 5428 f(jdk_internal_foreign_abi_ABIDescriptor) \ 5429 f(jdk_internal_foreign_abi_VMStorage) \ 5430 f(jdk_internal_foreign_abi_CallConv) \ 5431 f(jdk_internal_misc_UnsafeConstants) \ 5432 f(java_lang_boxing_object) \ 5433 f(vector_VectorPayload) \ 5434 //end 5435 5436 #define BASIC_JAVA_CLASSES_DO(f) \ 5437 BASIC_JAVA_CLASSES_DO_PART1(f) \ 5438 BASIC_JAVA_CLASSES_DO_PART2(f) 5439 5440 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets(); 5441 5442 // Compute field offsets of all the classes in this file 5443 void JavaClasses::compute_offsets() { 5444 if (CDSConfig::is_using_archive()) { 5445 JVMTI_ONLY(assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() && 5446 JvmtiExport::has_early_class_hook_env()), 5447 "JavaClasses::compute_offsets() must be called in early JVMTI phase.")); 5448 // None of the classes used by the rest of this function can be replaced by 5449 // JVMTI ClassFileLoadHook. 5450 // We are safe to use the archived offsets, which have already been restored 5451 // by JavaClasses::serialize_offsets, without computing the offsets again. 5452 return; 5453 } 5454 5455 // We have already called the compute_offsets() of the 5456 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String, java_lang_Class and 5457 // java_lang_ref_Reference) earlier inside vmClasses::resolve_all() 5458 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS); 5459 } 5460 5461 #if INCLUDE_CDS 5462 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc); 5463 5464 void JavaClasses::serialize_offsets(SerializeClosure* soc) { 5465 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS); 5466 } 5467 #endif 5468 5469 #if INCLUDE_CDS_JAVA_HEAP 5470 bool JavaClasses::is_supported_for_archiving(oop obj) { 5471 Klass* klass = obj->klass(); 5472 5473 if (!CDSConfig::is_dumping_method_handles()) { 5474 // These are supported by CDS only when CDSConfig::is_dumping_method_handles() is enabled. 5475 if (klass == vmClasses::ResolvedMethodName_klass() || 5476 klass == vmClasses::MemberName_klass()) { 5477 return false; 5478 } 5479 } 5480 5481 if (!AOTReferenceObjSupport::is_enabled() && klass->is_subclass_of(vmClasses::Reference_klass())) { 5482 return false; 5483 } 5484 5485 return true; 5486 } 5487 #endif 5488 5489 #ifndef PRODUCT 5490 5491 // These functions exist to assert the validity of de-serialized offsets in boxing object as a sanity check. 5492 5493 bool JavaClasses::check_offset(const char *klass_name, int deserialized_offset, const char *field_name, 5494 const char* field_sig) { 5495 EXCEPTION_MARK; 5496 fieldDescriptor fd; 5497 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name); 5498 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 5499 InstanceKlass* ik = InstanceKlass::cast(k); 5500 TempNewSymbol f_name = SymbolTable::new_symbol(field_name); 5501 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig); 5502 if (!ik->find_local_field(f_name, f_sig, &fd)) { 5503 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 5504 return false; 5505 } 5506 if (fd.is_static()) { 5507 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 5508 return false; 5509 } 5510 if (fd.offset() == deserialized_offset ) { 5511 return true; 5512 } else { 5513 tty->print_cr("Offset of nonstatic field %s.%s is deserialized as %d but should really be %d.", 5514 klass_name, field_name, deserialized_offset, fd.offset()); 5515 return false; 5516 } 5517 } 5518 5519 void JavaClasses::check_offsets() { 5520 bool valid = true; 5521 5522 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 5523 valid &= check_offset(klass_name, cpp_klass_name :: _##field_name ## _offset, #field_name, field_sig) 5524 5525 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 5526 valid &= check_offset(klass_name, cpp_klass_name :: _##long_ ## field_name ## _offset, #field_name, field_sig) 5527 5528 // Boxed primitive objects (java_lang_boxing_object) 5529 5530 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 5531 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 5532 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 5533 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 5534 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 5535 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 5536 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 5537 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 5538 5539 if (!valid) vm_exit_during_initialization("Field offset verification failed"); 5540 } 5541 5542 #endif // PRODUCT 5543 5544 int InjectedField::compute_offset() { 5545 InstanceKlass* ik = InstanceKlass::cast(klass()); 5546 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 5547 if (!may_be_java && !fs.field_flags().is_injected()) { 5548 // Only look at injected fields 5549 continue; 5550 } 5551 if (fs.name() == name() && fs.signature() == signature()) { 5552 return fs.offset(); 5553 } 5554 } 5555 ResourceMark rm; 5556 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)" : ""); 5557 #ifndef PRODUCT 5558 ik->print(); 5559 tty->print_cr("all fields:"); 5560 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 5561 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_field_flags()); 5562 } 5563 #endif //PRODUCT 5564 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class"); 5565 return -1; 5566 } 5567 5568 void javaClasses_init() { 5569 JavaClasses::compute_offsets(); 5570 JavaClasses::check_offsets(); 5571 FilteredFieldsMap::initialize(); // must be done after computing offsets. 5572 }