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/archiveBuilder.hpp" 26 #include "cds/archiveHeapLoader.hpp" 27 #include "cds/cdsConfig.hpp" 28 #include "cds/heapShared.hpp" 29 #include "cds/metaspaceShared.hpp" 30 #include "classfile/altHashing.hpp" 31 #include "classfile/classLoaderData.inline.hpp" 32 #include "classfile/javaClasses.inline.hpp" 33 #include "classfile/javaClassesImpl.hpp" 34 #include "classfile/javaThreadStatus.hpp" 35 #include "classfile/moduleEntry.hpp" 36 #include "classfile/stringTable.hpp" 37 #include "classfile/symbolTable.hpp" 38 #include "classfile/systemDictionary.hpp" 39 #include "classfile/vmClasses.hpp" 40 #include "classfile/vmSymbols.hpp" 41 #include "code/debugInfo.hpp" 42 #include "code/dependencyContext.hpp" 43 #include "code/pcDesc.hpp" 44 #include "gc/shared/collectedHeap.inline.hpp" 45 #include "interpreter/interpreter.hpp" 46 #include "interpreter/linkResolver.hpp" 47 #include "jvm.h" 48 #include "logging/log.hpp" 49 #include "logging/logStream.hpp" 50 #include "memory/oopFactory.hpp" 51 #include "memory/resourceArea.hpp" 52 #include "memory/universe.hpp" 53 #include "oops/fieldInfo.hpp" 54 #include "oops/fieldStreams.inline.hpp" 55 #include "oops/instanceKlass.inline.hpp" 56 #include "oops/instanceMirrorKlass.hpp" 57 #include "oops/klass.hpp" 58 #include "oops/klass.inline.hpp" 59 #include "oops/method.inline.hpp" 60 #include "oops/objArrayKlass.hpp" 61 #include "oops/objArrayOop.inline.hpp" 62 #include "oops/oopCast.inline.hpp" 63 #include "oops/oop.inline.hpp" 64 #include "oops/symbol.hpp" 65 #include "oops/recordComponent.hpp" 66 #include "oops/typeArrayOop.inline.hpp" 67 #include "prims/jvmtiExport.hpp" 68 #include "prims/methodHandles.hpp" 69 #include "prims/resolvedMethodTable.hpp" 70 #include "runtime/continuationEntry.inline.hpp" 71 #include "runtime/continuationJavaClasses.inline.hpp" 72 #include "runtime/fieldDescriptor.inline.hpp" 73 #include "runtime/frame.inline.hpp" 74 #include "runtime/handles.inline.hpp" 75 #include "runtime/handshake.hpp" 76 #include "runtime/init.hpp" 77 #include "runtime/interfaceSupport.inline.hpp" 78 #include "runtime/java.hpp" 79 #include "runtime/javaCalls.hpp" 80 #include "runtime/javaThread.hpp" 81 #include "runtime/jniHandles.inline.hpp" 82 #include "runtime/reflectionUtils.hpp" 83 #include "runtime/safepoint.hpp" 84 #include "runtime/safepointVerifiers.hpp" 85 #include "runtime/threadSMR.hpp" 86 #include "runtime/vframe.inline.hpp" 87 #include "runtime/vm_version.hpp" 88 #include "utilities/align.hpp" 89 #include "utilities/globalDefinitions.hpp" 90 #include "utilities/growableArray.hpp" 91 #include "utilities/preserveException.hpp" 92 #include "utilities/utf8.hpp" 93 #if INCLUDE_JVMCI 94 #include "jvmci/jvmciJavaClasses.hpp" 95 #endif 96 97 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \ 98 { VM_CLASS_ID(klass), VM_SYMBOL_ENUM_NAME(name##_name), VM_SYMBOL_ENUM_NAME(signature), may_be_java }, 99 100 InjectedField JavaClasses::_injected_fields[] = { 101 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD) 102 }; 103 104 // Register native methods of Object 105 void java_lang_Object::register_natives(TRAPS) { 106 InstanceKlass* obj = vmClasses::Object_klass(); 107 Method::register_native(obj, vmSymbols::hashCode_name(), 108 vmSymbols::void_int_signature(), (address) &JVM_IHashCode, CHECK); 109 Method::register_native(obj, vmSymbols::wait_name(), 110 vmSymbols::long_void_signature(), (address) &JVM_MonitorWait, CHECK); 111 Method::register_native(obj, vmSymbols::notify_name(), 112 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotify, CHECK); 113 Method::register_native(obj, vmSymbols::notifyAll_name(), 114 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotifyAll, CHECK); 115 Method::register_native(obj, vmSymbols::clone_name(), 116 vmSymbols::void_object_signature(), (address) &JVM_Clone, THREAD); 117 } 118 119 int JavaClasses::compute_injected_offset(InjectedFieldID id) { 120 return _injected_fields[(int)id].compute_offset(); 121 } 122 123 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) { 124 *field_count = 0; 125 126 vmSymbolID sid = vmSymbols::find_sid(class_name); 127 if (sid == vmSymbolID::NO_SID) { 128 // Only well known classes can inject fields 129 return nullptr; 130 } 131 132 int count = 0; 133 int start = -1; 134 135 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \ 136 if (sid == VM_SYMBOL_ENUM_NAME(klass)) { \ 137 count++; \ 138 if (start == -1) { \ 139 start = (int)InjectedFieldID::klass##_##name##_enum; \ 140 } \ 141 } 142 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD); 143 #undef LOOKUP_INJECTED_FIELD 144 145 if (start != -1) { 146 *field_count = count; 147 return _injected_fields + start; 148 } 149 return nullptr; 150 } 151 152 153 // Helpful routine for computing field offsets at run time rather than hardcoding them 154 // Finds local fields only, including static fields. Static field offsets are from the 155 // beginning of the mirror. 156 void JavaClasses::compute_offset(int &dest_offset, 157 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol, 158 bool is_static) { 159 fieldDescriptor fd; 160 if (ik == nullptr) { 161 ResourceMark rm; 162 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string()); 163 vm_exit_during_initialization("Invalid layout of well-known class"); 164 } 165 166 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) { 167 ResourceMark rm; 168 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(), 169 name_symbol->as_C_string(), signature_symbol->as_C_string()); 170 #ifndef PRODUCT 171 // Prints all fields and offsets 172 Log(class) lt; 173 LogStream ls(lt.error()); 174 ik->print_on(&ls); 175 #endif //PRODUCT 176 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class"); 177 } 178 dest_offset = fd.offset(); 179 } 180 181 // Overloading to pass name as a string. 182 void JavaClasses::compute_offset(int& dest_offset, InstanceKlass* ik, 183 const char* name_string, Symbol* signature_symbol, 184 bool is_static) { 185 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string)); 186 if (name == nullptr) { 187 ResourceMark rm; 188 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string); 189 vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name()); 190 } 191 compute_offset(dest_offset, ik, name, signature_symbol, is_static); 192 } 193 194 // java_lang_String 195 196 int java_lang_String::_value_offset; 197 int java_lang_String::_hash_offset; 198 int java_lang_String::_hashIsZero_offset; 199 int java_lang_String::_coder_offset; 200 int java_lang_String::_flags_offset; 201 202 bool java_lang_String::_initialized; 203 204 205 bool java_lang_String::test_and_set_flag(oop java_string, uint8_t flag_mask) { 206 uint8_t* addr = flags_addr(java_string); 207 uint8_t value = Atomic::load(addr); 208 while ((value & flag_mask) == 0) { 209 uint8_t old_value = value; 210 value |= flag_mask; 211 value = Atomic::cmpxchg(addr, old_value, value); 212 if (value == old_value) return false; // Flag bit changed from 0 to 1. 213 } 214 return true; // Flag bit is already 1. 215 } 216 217 #define STRING_FIELDS_DO(macro) \ 218 macro(_value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \ 219 macro(_hash_offset, k, "hash", int_signature, false); \ 220 macro(_hashIsZero_offset, k, "hashIsZero", bool_signature, false); \ 221 macro(_coder_offset, k, "coder", byte_signature, false); 222 223 void java_lang_String::compute_offsets() { 224 if (_initialized) { 225 return; 226 } 227 228 InstanceKlass* k = vmClasses::String_klass(); 229 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET); 230 STRING_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 231 232 _initialized = true; 233 } 234 235 #if INCLUDE_CDS 236 void java_lang_String::serialize_offsets(SerializeClosure* f) { 237 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 238 STRING_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 239 f->do_bool(&_initialized); 240 } 241 #endif 242 243 class CompactStringsFixup : public FieldClosure { 244 private: 245 bool _value; 246 247 public: 248 CompactStringsFixup(bool value) : _value(value) {} 249 250 void do_field(fieldDescriptor* fd) { 251 if (fd->name() == vmSymbols::compact_strings_name()) { 252 oop mirror = fd->field_holder()->java_mirror(); 253 assert(fd->field_holder() == vmClasses::String_klass(), "Should be String"); 254 assert(mirror != nullptr, "String must have mirror already"); 255 mirror->bool_field_put(fd->offset(), _value); 256 } 257 } 258 }; 259 260 void java_lang_String::set_compact_strings(bool value) { 261 CompactStringsFixup fix(value); 262 vmClasses::String_klass()->do_local_static_fields(&fix); 263 } 264 265 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) { 266 assert(_initialized, "Must be initialized"); 267 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings"); 268 269 // Create the String object first, so there's a chance that the String 270 // and the char array it points to end up in the same cache line. 271 oop obj; 272 obj = vmClasses::String_klass()->allocate_instance(CHECK_NH); 273 274 // Create the char array. The String object must be handlized here 275 // because GC can happen as a result of the allocation attempt. 276 Handle h_obj(THREAD, obj); 277 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16. 278 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);; 279 280 // Point the String at the char array 281 obj = h_obj(); 282 set_value(obj, buffer); 283 // No need to zero the offset, allocation zero'ed the entire String object 284 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16); 285 return h_obj; 286 } 287 288 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) { 289 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length); 290 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 291 typeArrayOop buffer = value(h_obj()); 292 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]"); 293 if (is_latin1) { 294 for (int index = 0; index < length; index++) { 295 buffer->byte_at_put(index, (jbyte)unicode[index]); 296 } 297 } else { 298 for (int index = 0; index < length; index++) { 299 buffer->char_at_put(index, unicode[index]); 300 } 301 } 302 303 #ifdef ASSERT 304 { 305 ResourceMark rm; 306 size_t utf8_len = static_cast<size_t>(length); 307 char* expected = UNICODE::as_utf8(unicode, utf8_len); 308 char* actual = as_utf8_string(h_obj()); 309 if (strcmp(expected, actual) != 0) { 310 fatal("Unicode conversion failure: %s --> %s", expected, actual); 311 } 312 } 313 #endif 314 315 return h_obj; 316 } 317 318 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) { 319 Handle h_obj = create_from_unicode(unicode, length, CHECK_NULL); 320 return h_obj(); 321 } 322 323 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) { 324 if (utf8_str == nullptr) { 325 return Handle(); 326 } 327 bool has_multibyte, is_latin1; 328 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte); 329 if (!CompactStrings) { 330 has_multibyte = true; 331 is_latin1 = false; 332 } 333 334 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 335 if (length > 0) { 336 if (!has_multibyte) { 337 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str); 338 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length); 339 } else if (is_latin1) { 340 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 341 } else { 342 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 343 } 344 } 345 346 #ifdef ASSERT 347 // This check is too strict when the input string is not a valid UTF8. 348 // For example, it may be created with arbitrary content via jni_NewStringUTF. 349 if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, strlen(utf8_str), /*version_leq_47*/false)) { 350 ResourceMark rm; 351 const char* expected = utf8_str; 352 char* actual = as_utf8_string(h_obj()); 353 if (strcmp(expected, actual) != 0) { 354 fatal("String conversion failure: %s --> %s", expected, actual); 355 } 356 } 357 #endif 358 359 return h_obj; 360 } 361 362 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) { 363 Handle h_obj = create_from_str(utf8_str, CHECK_NULL); 364 return h_obj(); 365 } 366 367 Handle java_lang_String::create_from_symbol(const Symbol* symbol, TRAPS) { 368 const char* utf8_str = (char*)symbol->bytes(); 369 int utf8_len = symbol->utf8_length(); 370 371 bool has_multibyte, is_latin1; 372 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte); 373 if (!CompactStrings) { 374 has_multibyte = true; 375 is_latin1 = false; 376 } 377 378 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 379 if (length > 0) { 380 if (!has_multibyte) { 381 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str); 382 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length); 383 } else if (is_latin1) { 384 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 385 } else { 386 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 387 } 388 } 389 390 #ifdef ASSERT 391 // This check is too strict on older classfile versions 392 if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, utf8_len, /*version_leq_47*/false)) 393 { 394 ResourceMark rm; 395 const char* expected = symbol->as_utf8(); 396 char* actual = as_utf8_string(h_obj()); 397 if (strncmp(expected, actual, utf8_len) != 0) { 398 fatal("Symbol conversion failure: %s --> %s", expected, actual); 399 } 400 } 401 #endif 402 403 return h_obj; 404 } 405 406 // Converts a C string to a Java String based on current encoding 407 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) { 408 assert(str != nullptr, "bad arguments"); 409 410 typedef jstring (JNICALL *to_java_string_fn_t)(JNIEnv*, const char *); 411 static to_java_string_fn_t _to_java_string_fn = nullptr; 412 413 if (_to_java_string_fn == nullptr) { 414 void *lib_handle = os::native_java_library(); 415 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "JNU_NewStringPlatform")); 416 if (_to_java_string_fn == nullptr) { 417 fatal("JNU_NewStringPlatform missing"); 418 } 419 } 420 421 jstring js = nullptr; 422 { 423 JavaThread* thread = THREAD; 424 HandleMark hm(thread); 425 ThreadToNativeFromVM ttn(thread); 426 js = (_to_java_string_fn)(thread->jni_environment(), str); 427 } 428 429 Handle native_platform_string(THREAD, JNIHandles::resolve(js)); 430 JNIHandles::destroy_local(js); // destroy local JNIHandle. 431 return native_platform_string; 432 } 433 434 // Converts a Java String to a native C string that can be used for 435 // native OS calls. 436 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) { 437 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*); 438 static to_platform_string_fn_t _to_platform_string_fn = nullptr; 439 440 if (_to_platform_string_fn == nullptr) { 441 void *lib_handle = os::native_java_library(); 442 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars")); 443 if (_to_platform_string_fn == nullptr) { 444 fatal("GetStringPlatformChars missing"); 445 } 446 } 447 448 char *native_platform_string; 449 jstring js; 450 { JavaThread* thread = THREAD; 451 js = (jstring) JNIHandles::make_local(thread, java_string()); 452 HandleMark hm(thread); 453 ThreadToNativeFromVM ttn(thread); 454 JNIEnv *env = thread->jni_environment(); 455 bool is_copy; 456 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy); 457 assert(is_copy == JNI_TRUE, "is_copy value changed"); 458 } 459 460 // Uses a store barrier and therefore needs to be in vm state 461 JNIHandles::destroy_local(js); 462 463 return native_platform_string; 464 } 465 466 Handle java_lang_String::externalize_classname(Symbol* java_name, TRAPS) { 467 ResourceMark rm(THREAD); 468 return create_from_str(java_name->as_klass_external_name(), THREAD); 469 } 470 471 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) { 472 jchar* result = as_unicode_string_or_null(java_string, length); 473 if (result == nullptr) { 474 THROW_MSG_NULL(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string"); 475 } 476 return result; 477 } 478 479 jchar* java_lang_String::as_unicode_string_or_null(oop java_string, int& length) { 480 typeArrayOop value = java_lang_String::value(java_string); 481 length = java_lang_String::length(java_string, value); 482 bool is_latin1 = java_lang_String::is_latin1(java_string); 483 484 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length); 485 if (result != nullptr) { 486 if (!is_latin1) { 487 for (int index = 0; index < length; index++) { 488 result[index] = value->char_at(index); 489 } 490 } else { 491 for (int index = 0; index < length; index++) { 492 result[index] = ((jchar) value->byte_at(index)) & 0xff; 493 } 494 } 495 } 496 return result; 497 } 498 499 inline unsigned int java_lang_String::hash_code_impl(oop java_string, bool update) { 500 // The hash and hashIsZero fields are subject to a benign data race, 501 // making it crucial to ensure that any observable result of the 502 // calculation in this method stays correct under any possible read of 503 // these fields. Necessary restrictions to allow this to be correct 504 // without explicit memory fences or similar concurrency primitives is 505 // that we can ever only write to one of these two fields for a given 506 // String instance, and that the computation is idempotent and derived 507 // from immutable state 508 assert(_initialized && (_hash_offset > 0) && (_hashIsZero_offset > 0), "Must be initialized"); 509 if (java_lang_String::hash_is_set(java_string)) { 510 return java_string->int_field(_hash_offset); 511 } 512 513 typeArrayOop value = java_lang_String::value(java_string); 514 int length = java_lang_String::length(java_string, value); 515 bool is_latin1 = java_lang_String::is_latin1(java_string); 516 517 unsigned int hash = 0; 518 if (length > 0) { 519 if (is_latin1) { 520 hash = java_lang_String::hash_code(value->byte_at_addr(0), length); 521 } else { 522 hash = java_lang_String::hash_code(value->char_at_addr(0), length); 523 } 524 } 525 526 if (update) { 527 if (hash != 0) { 528 java_string->int_field_put(_hash_offset, hash); 529 } else { 530 java_string->bool_field_put(_hashIsZero_offset, true); 531 } 532 } 533 return hash; 534 } 535 536 unsigned int java_lang_String::hash_code(oop java_string) { 537 return hash_code_impl(java_string, /*update=*/true); 538 } 539 540 unsigned int java_lang_String::hash_code_noupdate(oop java_string) { 541 return hash_code_impl(java_string, /*update=*/false); 542 } 543 544 545 char* java_lang_String::as_quoted_ascii(oop java_string) { 546 typeArrayOop value = java_lang_String::value(java_string); 547 int length = java_lang_String::length(java_string, value); 548 bool is_latin1 = java_lang_String::is_latin1(java_string); 549 550 if (length == 0) return nullptr; 551 552 char* result; 553 size_t result_length; 554 if (!is_latin1) { 555 jchar* base = value->char_at_addr(0); 556 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 557 result = NEW_RESOURCE_ARRAY(char, result_length); 558 UNICODE::as_quoted_ascii(base, length, result, result_length); 559 } else { 560 jbyte* base = value->byte_at_addr(0); 561 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 562 result = NEW_RESOURCE_ARRAY(char, result_length); 563 UNICODE::as_quoted_ascii(base, length, result, result_length); 564 } 565 assert(result_length >= (size_t)length + 1, "must not be shorter"); 566 assert(result_length == strlen(result) + 1, "must match"); 567 return result; 568 } 569 570 Symbol* java_lang_String::as_symbol(oop java_string) { 571 typeArrayOop value = java_lang_String::value(java_string); 572 int length = java_lang_String::length(java_string, value); 573 bool is_latin1 = java_lang_String::is_latin1(java_string); 574 if (!is_latin1) { 575 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0); 576 Symbol* sym = SymbolTable::new_symbol(base, length); 577 return sym; 578 } else { 579 ResourceMark rm; 580 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0); 581 size_t utf8_len = static_cast<size_t>(length); 582 const char* base = UNICODE::as_utf8(position, utf8_len); 583 Symbol* sym = SymbolTable::new_symbol(base, checked_cast<int>(utf8_len)); 584 return sym; 585 } 586 } 587 588 Symbol* java_lang_String::as_symbol_or_null(oop java_string) { 589 typeArrayOop value = java_lang_String::value(java_string); 590 int length = java_lang_String::length(java_string, value); 591 bool is_latin1 = java_lang_String::is_latin1(java_string); 592 if (!is_latin1) { 593 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0); 594 return SymbolTable::probe_unicode(base, length); 595 } else { 596 ResourceMark rm; 597 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0); 598 size_t utf8_len = static_cast<size_t>(length); 599 const char* base = UNICODE::as_utf8(position, utf8_len); 600 return SymbolTable::probe(base, checked_cast<int>(utf8_len)); 601 } 602 } 603 604 size_t java_lang_String::utf8_length(oop java_string, typeArrayOop value) { 605 assert(value_equals(value, java_lang_String::value(java_string)), 606 "value must be same as java_lang_String::value(java_string)"); 607 int length = java_lang_String::length(java_string, value); 608 if (length == 0) { 609 return 0; 610 } 611 if (!java_lang_String::is_latin1(java_string)) { 612 return UNICODE::utf8_length(value->char_at_addr(0), length); 613 } else { 614 return UNICODE::utf8_length(value->byte_at_addr(0), length); 615 } 616 } 617 618 size_t java_lang_String::utf8_length(oop java_string) { 619 typeArrayOop value = java_lang_String::value(java_string); 620 return utf8_length(java_string, value); 621 } 622 623 int java_lang_String::utf8_length_as_int(oop java_string) { 624 typeArrayOop value = java_lang_String::value(java_string); 625 return utf8_length_as_int(java_string, value); 626 } 627 628 int java_lang_String::utf8_length_as_int(oop java_string, typeArrayOop value) { 629 assert(value_equals(value, java_lang_String::value(java_string)), 630 "value must be same as java_lang_String::value(java_string)"); 631 int length = java_lang_String::length(java_string, value); 632 if (length == 0) { 633 return 0; 634 } 635 if (!java_lang_String::is_latin1(java_string)) { 636 return UNICODE::utf8_length_as_int(value->char_at_addr(0), length); 637 } else { 638 return UNICODE::utf8_length_as_int(value->byte_at_addr(0), length); 639 } 640 } 641 642 char* java_lang_String::as_utf8_string(oop java_string) { 643 size_t length; 644 return as_utf8_string(java_string, length); 645 } 646 647 char* java_lang_String::as_utf8_string(oop java_string, size_t& length) { 648 typeArrayOop value = java_lang_String::value(java_string); 649 // `length` is used as the incoming number of characters to 650 // convert, and then set as the number of bytes in the UTF8 sequence. 651 length = java_lang_String::length(java_string, value); 652 bool is_latin1 = java_lang_String::is_latin1(java_string); 653 if (!is_latin1) { 654 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0); 655 return UNICODE::as_utf8(position, length); 656 } else { 657 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0); 658 return UNICODE::as_utf8(position, length); 659 } 660 } 661 662 // Uses a provided buffer if it's sufficiently large, otherwise allocates 663 // a resource array to fit 664 char* java_lang_String::as_utf8_string_full(oop java_string, char* buf, size_t buflen, size_t& utf8_len) { 665 typeArrayOop value = java_lang_String::value(java_string); 666 int len = java_lang_String::length(java_string, value); 667 bool is_latin1 = java_lang_String::is_latin1(java_string); 668 if (!is_latin1) { 669 jchar *position = (len == 0) ? nullptr : value->char_at_addr(0); 670 utf8_len = UNICODE::utf8_length(position, len); 671 if (utf8_len >= buflen) { 672 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1); 673 } 674 return UNICODE::as_utf8(position, len, buf, utf8_len + 1); 675 } else { 676 jbyte *position = (len == 0) ? nullptr : value->byte_at_addr(0); 677 utf8_len = UNICODE::utf8_length(position, len); 678 if (utf8_len >= buflen) { 679 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1); 680 } 681 return UNICODE::as_utf8(position, len, buf, utf8_len + 1); 682 } 683 } 684 685 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, size_t buflen) { 686 assert(value_equals(value, java_lang_String::value(java_string)), 687 "value must be same as java_lang_String::value(java_string)"); 688 int length = java_lang_String::length(java_string, value); 689 bool is_latin1 = java_lang_String::is_latin1(java_string); 690 if (!is_latin1) { 691 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0); 692 return UNICODE::as_utf8(position, length, buf, buflen); 693 } else { 694 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0); 695 return UNICODE::as_utf8(position, length, buf, buflen); 696 } 697 } 698 699 char* java_lang_String::as_utf8_string(oop java_string, char* buf, size_t buflen) { 700 typeArrayOop value = java_lang_String::value(java_string); 701 return as_utf8_string(java_string, value, buf, buflen); 702 } 703 704 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) { 705 // `length` is used as the incoming number of characters to 706 // convert, and then set as the number of bytes in the UTF8 sequence. 707 size_t length = static_cast<size_t>(len); 708 typeArrayOop value = java_lang_String::value(java_string); 709 bool is_latin1 = java_lang_String::is_latin1(java_string); 710 assert(start + len <= java_lang_String::length(java_string), "just checking"); 711 if (!is_latin1) { 712 jchar* position = value->char_at_addr(start); 713 return UNICODE::as_utf8(position, length); 714 } else { 715 jbyte* position = value->byte_at_addr(start); 716 return UNICODE::as_utf8(position, length); 717 } 718 } 719 720 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, size_t buflen) { 721 assert(value_equals(value, java_lang_String::value(java_string)), 722 "value must be same as java_lang_String::value(java_string)"); 723 assert(start + len <= java_lang_String::length(java_string), "just checking"); 724 bool is_latin1 = java_lang_String::is_latin1(java_string); 725 if (!is_latin1) { 726 jchar* position = value->char_at_addr(start); 727 return UNICODE::as_utf8(position, len, buf, buflen); 728 } else { 729 jbyte* position = value->byte_at_addr(start); 730 return UNICODE::as_utf8(position, len, buf, buflen); 731 } 732 } 733 734 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) { 735 assert(java_string->klass() == vmClasses::String_klass(), 736 "must be java_string"); 737 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 738 int length = java_lang_String::length(java_string, value); 739 if (length != len) { 740 return false; 741 } 742 bool is_latin1 = java_lang_String::is_latin1(java_string); 743 if (!is_latin1) { 744 for (int i = 0; i < len; i++) { 745 if (value->char_at(i) != chars[i]) { 746 return false; 747 } 748 } 749 } else { 750 for (int i = 0; i < len; i++) { 751 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) { 752 return false; 753 } 754 } 755 } 756 return true; 757 } 758 759 bool java_lang_String::equals(oop java_string, const char* utf8_string, size_t utf8_len) { 760 assert(java_string->klass() == vmClasses::String_klass(), 761 "must be java_string"); 762 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 763 int length = java_lang_String::length(java_string, value); 764 int unicode_length = UTF8::unicode_length(utf8_string, utf8_len); 765 if (length != unicode_length) { 766 return false; 767 } 768 bool is_latin1 = java_lang_String::is_latin1(java_string); 769 jchar c; 770 if (!is_latin1) { 771 for (int i = 0; i < unicode_length; i++) { 772 utf8_string = UTF8::next(utf8_string, &c); 773 if (value->char_at(i) != c) { 774 return false; 775 } 776 } 777 } else { 778 for (int i = 0; i < unicode_length; i++) { 779 utf8_string = UTF8::next(utf8_string, &c); 780 if ((((jchar) value->byte_at(i)) & 0xff) != c) { 781 return false; 782 } 783 } 784 } 785 return true; 786 } 787 788 bool java_lang_String::equals(oop str1, oop str2) { 789 assert(str1->klass() == vmClasses::String_klass(), 790 "must be java String"); 791 assert(str2->klass() == vmClasses::String_klass(), 792 "must be java String"); 793 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1); 794 bool is_latin1 = java_lang_String::is_latin1(str1); 795 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2); 796 bool is_latin2 = java_lang_String::is_latin1(str2); 797 798 if (is_latin1 != is_latin2) { 799 // Strings with different coders are never equal. 800 return false; 801 } 802 return value_equals(value1, value2); 803 } 804 805 // Print the given string to the given outputStream, limiting the output to 806 // at most max_length of the string's characters. If the length exceeds the 807 // limit we print an abridged version of the string with the "middle" elided 808 // and replaced by " ... (N characters ommitted) ... ". If max_length is odd 809 // it is treated as max_length-1. 810 void java_lang_String::print(oop java_string, outputStream* st, int max_length) { 811 assert(java_string->klass() == vmClasses::String_klass(), "must be java_string"); 812 // We need at least two characters to print A ... B 813 assert(max_length > 1, "invalid max_length: %d", max_length); 814 815 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 816 817 if (value == nullptr) { 818 // This can happen if, e.g., printing a String 819 // object before its initializer has been called 820 st->print("nullptr"); 821 return; 822 } 823 824 int length = java_lang_String::length(java_string, value); 825 bool is_latin1 = java_lang_String::is_latin1(java_string); 826 827 bool abridge = length > max_length; 828 829 st->print("\""); 830 for (int index = 0; index < length; index++) { 831 // If we need to abridge and we've printed half the allowed characters 832 // then jump to the tail of the string. 833 if (abridge && index >= max_length / 2) { 834 st->print(" ... (%d characters ommitted) ... ", length - 2 * (max_length / 2)); 835 index = length - (max_length / 2); 836 abridge = false; // only do this once 837 } 838 jchar c = (!is_latin1) ? value->char_at(index) : 839 ((jchar) value->byte_at(index)) & 0xff; 840 if (c < ' ') { 841 st->print("\\x%02X", c); // print control characters e.g. \x0A 842 } else { 843 st->print("%c", c); 844 } 845 } 846 st->print("\""); 847 848 if (length > max_length) { 849 st->print(" (abridged) "); 850 } 851 } 852 853 // java_lang_Class 854 855 int java_lang_Class::_klass_offset; 856 int java_lang_Class::_array_klass_offset; 857 int java_lang_Class::_oop_size_offset; 858 int java_lang_Class::_static_oop_field_count_offset; 859 int java_lang_Class::_class_loader_offset; 860 int java_lang_Class::_module_offset; 861 int java_lang_Class::_protection_domain_offset; 862 int java_lang_Class::_component_mirror_offset; 863 int java_lang_Class::_init_lock_offset; 864 int java_lang_Class::_signers_offset; 865 int java_lang_Class::_name_offset; 866 int java_lang_Class::_source_file_offset; 867 int java_lang_Class::_classData_offset; 868 int java_lang_Class::_classRedefinedCount_offset; 869 int java_lang_Class::_reflectionData_offset; 870 int java_lang_Class::_modifiers_offset; 871 int java_lang_Class::_is_primitive_offset; 872 873 bool java_lang_Class::_offsets_computed = false; 874 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = nullptr; 875 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = nullptr; 876 877 #ifdef ASSERT 878 inline static void assert_valid_static_string_field(fieldDescriptor* fd) { 879 assert(fd->has_initial_value(), "caller should have checked this"); 880 assert(fd->field_type() == T_OBJECT, "caller should have checked this"); 881 assert(fd->signature() == vmSymbols::string_signature(), "just checking"); 882 } 883 #endif 884 885 static void initialize_static_string_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 886 DEBUG_ONLY(assert_valid_static_string_field(fd);) 887 oop string = fd->string_initial_value(CHECK); 888 mirror()->obj_field_put(fd->offset(), string); 889 } 890 891 static void initialize_static_primitive_field(fieldDescriptor* fd, Handle mirror) { 892 assert(fd->has_initial_value(), "caller should have checked this"); 893 BasicType t = fd->field_type(); 894 switch (t) { 895 case T_BYTE: 896 mirror()->byte_field_put(fd->offset(), (jbyte)(fd->int_initial_value())); 897 break; 898 case T_BOOLEAN: 899 mirror()->bool_field_put(fd->offset(), (jboolean)(fd->int_initial_value())); 900 break; 901 case T_CHAR: 902 mirror()->char_field_put(fd->offset(), (jchar)(fd->int_initial_value())); 903 break; 904 case T_SHORT: 905 mirror()->short_field_put(fd->offset(), (jshort)(fd->int_initial_value())); 906 break; 907 case T_INT: 908 mirror()->int_field_put(fd->offset(), fd->int_initial_value()); 909 break; 910 case T_FLOAT: 911 mirror()->float_field_put(fd->offset(), fd->float_initial_value()); 912 break; 913 case T_DOUBLE: 914 mirror()->double_field_put(fd->offset(), fd->double_initial_value()); 915 break; 916 case T_LONG: 917 mirror()->long_field_put(fd->offset(), fd->long_initial_value()); 918 break; 919 default: 920 // Illegal ConstantValue attribute in class file should have been 921 // caught during classfile parsing. 922 ShouldNotReachHere(); 923 } 924 } 925 926 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 927 assert(mirror.not_null() && fd->is_static(), "just checking"); 928 if (fd->has_initial_value()) { 929 if (fd->field_type() != T_OBJECT) { 930 initialize_static_primitive_field(fd, mirror); 931 } else { 932 initialize_static_string_field(fd, mirror, CHECK); 933 } 934 } 935 } 936 937 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) { 938 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already"); 939 940 // If the offset was read from the shared archive, it was fixed up already 941 if (!k->is_shared()) { 942 if (k->is_instance_klass()) { 943 // During bootstrap, java.lang.Class wasn't loaded so static field 944 // offsets were computed without the size added it. Go back and 945 // update all the static field offsets to included the size. 946 947 // Unfortunately, the FieldInfo stream is encoded with UNSIGNED5 which doesn't allow 948 // content updates. So the FieldInfo stream has to be decompressed into a temporary array, 949 // static fields offsets are updated in this array before reencoding everything into 950 // a new UNSIGNED5 stream, and substitute it to the old FieldInfo stream. 951 952 int java_fields; 953 int injected_fields; 954 InstanceKlass* ik = InstanceKlass::cast(k); 955 GrowableArray<FieldInfo>* fields = 956 FieldInfoStream::create_FieldInfoArray(ik->fieldinfo_stream(), 957 &java_fields, &injected_fields); 958 for (int i = 0; i < fields->length(); i++) { 959 FieldInfo* fi = fields->adr_at(i); 960 if (fi->access_flags().is_static()) { 961 fi->set_offset(fi->offset() + InstanceMirrorKlass::offset_of_static_fields()); 962 } 963 } 964 Array<u1>* old_stream = ik->fieldinfo_stream(); 965 assert(fields->length() == (java_fields + injected_fields), "Must be"); 966 Array<u1>* new_fis = FieldInfoStream::create_FieldInfoStream(fields, java_fields, injected_fields, k->class_loader_data(), CHECK); 967 ik->set_fieldinfo_stream(new_fis); 968 MetadataFactory::free_array<u1>(k->class_loader_data(), old_stream); 969 } 970 } 971 972 if (k->is_shared() && k->has_archived_mirror_index()) { 973 if (ArchiveHeapLoader::is_in_use()) { 974 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK); 975 assert(present, "Missing archived mirror for %s", k->external_name()); 976 return; 977 } else { 978 k->clear_java_mirror_handle(); 979 k->clear_archived_mirror_index(); 980 } 981 } 982 create_mirror(k, Handle(), Handle(), Handle(), Handle(), CHECK); 983 } 984 985 void java_lang_Class::initialize_mirror_fields(Klass* k, 986 Handle mirror, 987 Handle protection_domain, 988 Handle classData, 989 TRAPS) { 990 // Allocate a simple java object for a lock. 991 // This needs to be a java object because during class initialization 992 // it can be held across a java call. 993 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK); 994 set_init_lock(mirror(), r); 995 996 // Set protection domain also 997 set_protection_domain(mirror(), protection_domain()); 998 999 // Initialize static fields 1000 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK); 1001 1002 // Set classData 1003 set_class_data(mirror(), classData()); 1004 } 1005 1006 // Set the java.lang.Module module field in the java_lang_Class mirror 1007 void java_lang_Class::set_mirror_module_field(JavaThread* current, Klass* k, Handle mirror, Handle module) { 1008 if (module.is_null()) { 1009 // During startup, the module may be null only if java.base has not been defined yet. 1010 // Put the class on the fixup_module_list to patch later when the java.lang.Module 1011 // for java.base is known. But note that since we captured the null module another 1012 // thread may have completed that initialization. 1013 1014 bool javabase_was_defined = false; 1015 { 1016 MutexLocker m1(current, Module_lock); 1017 // Keep list of classes needing java.base module fixup 1018 if (!ModuleEntryTable::javabase_defined()) { 1019 assert(k->java_mirror() != nullptr, "Class's mirror is null"); 1020 k->class_loader_data()->inc_keep_alive_ref_count(); 1021 assert(fixup_module_field_list() != nullptr, "fixup_module_field_list not initialized"); 1022 fixup_module_field_list()->push(k); 1023 } else { 1024 javabase_was_defined = true; 1025 } 1026 } 1027 1028 // If java.base was already defined then patch this particular class with java.base. 1029 if (javabase_was_defined) { 1030 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry(); 1031 assert(javabase_entry != nullptr && javabase_entry->module() != nullptr, 1032 "Setting class module field, " JAVA_BASE_NAME " should be defined"); 1033 Handle javabase_handle(current, javabase_entry->module()); 1034 set_module(mirror(), javabase_handle()); 1035 } 1036 } else { 1037 assert(Universe::is_module_initialized() || 1038 (ModuleEntryTable::javabase_defined() && 1039 (module() == ModuleEntryTable::javabase_moduleEntry()->module())), 1040 "Incorrect java.lang.Module specification while creating mirror"); 1041 set_module(mirror(), module()); 1042 } 1043 } 1044 1045 // Statically allocate fixup lists because they always get created. 1046 void java_lang_Class::allocate_fixup_lists() { 1047 GrowableArray<Klass*>* mirror_list = 1048 new (mtClass) GrowableArray<Klass*>(40, mtClass); 1049 set_fixup_mirror_list(mirror_list); 1050 1051 GrowableArray<Klass*>* module_list = 1052 new (mtModule) GrowableArray<Klass*>(500, mtModule); 1053 set_fixup_module_field_list(module_list); 1054 } 1055 1056 void java_lang_Class::allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData, 1057 Handle& mirror, Handle& comp_mirror, TRAPS) { 1058 // Allocate mirror (java.lang.Class instance) 1059 oop mirror_oop = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(k, CHECK); 1060 mirror = Handle(THREAD, mirror_oop); 1061 1062 // Setup indirection from mirror->klass 1063 set_klass(mirror(), k); 1064 1065 // Set the modifiers flag. 1066 u2 computed_modifiers = k->compute_modifier_flags(); 1067 set_modifiers(mirror(), computed_modifiers); 1068 1069 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass()); 1070 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set"); 1071 1072 set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror())); 1073 1074 // It might also have a component mirror. This mirror must already exist. 1075 if (k->is_array_klass()) { 1076 if (k->is_typeArray_klass()) { 1077 BasicType type = TypeArrayKlass::cast(k)->element_type(); 1078 if (is_scratch) { 1079 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(type)); 1080 } else { 1081 comp_mirror = Handle(THREAD, Universe::java_mirror(type)); 1082 } 1083 } else { 1084 assert(k->is_objArray_klass(), "Must be"); 1085 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass(); 1086 assert(element_klass != nullptr, "Must have an element klass"); 1087 if (is_scratch) { 1088 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass)); 1089 } else { 1090 comp_mirror = Handle(THREAD, element_klass->java_mirror()); 1091 } 1092 } 1093 assert(comp_mirror() != nullptr, "must have a mirror"); 1094 1095 // Two-way link between the array klass and its component mirror: 1096 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k 1097 set_component_mirror(mirror(), comp_mirror()); 1098 // See below for ordering dependencies between field array_klass in component mirror 1099 // and java_mirror in this klass. 1100 } else { 1101 assert(k->is_instance_klass(), "Must be"); 1102 1103 initialize_mirror_fields(k, mirror, protection_domain, classData, THREAD); 1104 if (HAS_PENDING_EXCEPTION) { 1105 // If any of the fields throws an exception like OOM remove the klass field 1106 // from the mirror so GC doesn't follow it after the klass has been deallocated. 1107 // This mirror looks like a primitive type, which logically it is because it 1108 // it represents no class. 1109 set_klass(mirror(), nullptr); 1110 return; 1111 } 1112 } 1113 } 1114 1115 void java_lang_Class::create_mirror(Klass* k, Handle class_loader, 1116 Handle module, Handle protection_domain, 1117 Handle classData, TRAPS) { 1118 assert(k != nullptr, "Use create_basic_type_mirror for primitive types"); 1119 assert(k->java_mirror() == nullptr, "should only assign mirror once"); 1120 1121 // Class_klass has to be loaded because it is used to allocate 1122 // the mirror. 1123 if (vmClasses::Class_klass_loaded()) { 1124 Handle mirror; 1125 Handle comp_mirror; 1126 1127 allocate_mirror(k, /*is_scratch=*/false, protection_domain, classData, mirror, comp_mirror, CHECK); 1128 1129 // set the classLoader field in the java_lang_Class instance 1130 assert(class_loader() == k->class_loader(), "should be same"); 1131 set_class_loader(mirror(), class_loader()); 1132 1133 // Setup indirection from klass->mirror 1134 // after any exceptions can happen during allocations. 1135 k->set_java_mirror(mirror); 1136 1137 // Set the module field in the java_lang_Class instance. This must be done 1138 // after the mirror is set. 1139 set_mirror_module_field(THREAD, k, mirror, module); 1140 1141 if (comp_mirror() != nullptr) { 1142 // Set after k->java_mirror() is published, because compiled code running 1143 // concurrently doesn't expect a k to have a null java_mirror. 1144 release_set_array_klass(comp_mirror(), k); 1145 } 1146 if (CDSConfig::is_dumping_heap()) { 1147 create_scratch_mirror(k, CHECK); 1148 } 1149 } else { 1150 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized"); 1151 fixup_mirror_list()->push(k); 1152 } 1153 } 1154 1155 #if INCLUDE_CDS_JAVA_HEAP 1156 // The "scratch mirror" stores the states of the mirror object that can be 1157 // decided at dump time (such as the initial values of the static fields, the 1158 // component mirror, etc). At runtime, more information is added to it by 1159 // java_lang_Class::restore_archived_mirror(). 1160 // 1161 // Essentially, /*dumptime*/create_scratch_mirror() + /*runtime*/restore_archived_mirror() 1162 // produces the same result as /*runtime*/create_mirror(). 1163 // 1164 // Note: we archive the "scratch mirror" instead of k->java_mirror(), because the 1165 // latter may contain dumptime-specific information that cannot be archived 1166 // (e.g., ClassLoaderData*, or static fields that are modified by Java code execution). 1167 void java_lang_Class::create_scratch_mirror(Klass* k, TRAPS) { 1168 if (k->class_loader() != nullptr && 1169 k->class_loader() != SystemDictionary::java_platform_loader() && 1170 k->class_loader() != SystemDictionary::java_system_loader()) { 1171 // We only archive the mirrors of classes loaded by the built-in loaders 1172 return; 1173 } 1174 1175 Handle protection_domain, classData; // set to null. Will be reinitialized at runtime 1176 Handle mirror; 1177 Handle comp_mirror; 1178 allocate_mirror(k, /*is_scratch=*/true, protection_domain, classData, mirror, comp_mirror, CHECK); 1179 1180 if (comp_mirror() != nullptr) { 1181 release_set_array_klass(comp_mirror(), k); 1182 } 1183 1184 HeapShared::set_scratch_java_mirror(k, mirror()); 1185 } 1186 1187 // Returns true if the mirror is updated, false if no archived mirror 1188 // data is present. After the archived mirror object is restored, the 1189 // shared klass' _has_raw_archived_mirror flag is cleared. 1190 bool java_lang_Class::restore_archived_mirror(Klass *k, 1191 Handle class_loader, Handle module, 1192 Handle protection_domain, TRAPS) { 1193 // Postpone restoring archived mirror until java.lang.Class is loaded. Please 1194 // see more details in vmClasses::resolve_all(). 1195 if (!vmClasses::Class_klass_loaded()) { 1196 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized"); 1197 fixup_mirror_list()->push(k); 1198 return true; 1199 } 1200 1201 oop m = k->archived_java_mirror(); 1202 assert(m != nullptr, "must have stored non-null archived mirror"); 1203 1204 // Sanity: clear it now to prevent re-initialization if any of the following fails 1205 k->clear_archived_mirror_index(); 1206 1207 // mirror is archived, restore 1208 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m)); 1209 assert(as_Klass(m) == k, "must be"); 1210 Handle mirror(THREAD, m); 1211 1212 if (!k->is_array_klass()) { 1213 // - local static final fields with initial values were initialized at dump time 1214 1215 // create the init_lock 1216 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false)); 1217 set_init_lock(mirror(), r); 1218 1219 if (protection_domain.not_null()) { 1220 set_protection_domain(mirror(), protection_domain()); 1221 } 1222 } 1223 1224 assert(class_loader() == k->class_loader(), "should be same"); 1225 if (class_loader.not_null()) { 1226 set_class_loader(mirror(), class_loader()); 1227 } 1228 1229 k->set_java_mirror(mirror); 1230 1231 set_mirror_module_field(THREAD, k, mirror, module); 1232 1233 if (log_is_enabled(Trace, cds, heap, mirror)) { 1234 ResourceMark rm(THREAD); 1235 log_trace(cds, heap, mirror)( 1236 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror())); 1237 } 1238 1239 return true; 1240 } 1241 #endif // INCLUDE_CDS_JAVA_HEAP 1242 1243 void java_lang_Class::fixup_module_field(Klass* k, Handle module) { 1244 assert(_module_offset != 0, "must have been computed already"); 1245 set_module(k->java_mirror(), module()); 1246 } 1247 1248 void java_lang_Class::set_oop_size(HeapWord* java_class, size_t size) { 1249 assert(_oop_size_offset != 0, "must be set"); 1250 assert(size > 0, "Oop size must be greater than zero, not %zu", size); 1251 assert(size <= INT_MAX, "Lossy conversion: %zu", size); 1252 *(int*)(((char*)java_class) + _oop_size_offset) = (int)size; 1253 } 1254 1255 int java_lang_Class::static_oop_field_count(oop java_class) { 1256 assert(_static_oop_field_count_offset != 0, "must be set"); 1257 return java_class->int_field(_static_oop_field_count_offset); 1258 } 1259 1260 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) { 1261 assert(_static_oop_field_count_offset != 0, "must be set"); 1262 java_class->int_field_put(_static_oop_field_count_offset, size); 1263 } 1264 1265 oop java_lang_Class::protection_domain(oop java_class) { 1266 assert(_protection_domain_offset != 0, "must be set"); 1267 return java_class->obj_field(_protection_domain_offset); 1268 } 1269 void java_lang_Class::set_protection_domain(oop java_class, oop pd) { 1270 assert(_protection_domain_offset != 0, "must be set"); 1271 java_class->obj_field_put(_protection_domain_offset, pd); 1272 } 1273 1274 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) { 1275 assert(_component_mirror_offset != 0, "must be set"); 1276 assert(java_lang_Class::as_Klass(java_class) != nullptr && 1277 java_lang_Class::as_Klass(java_class)->is_array_klass(), "must be"); 1278 java_class->obj_field_put(_component_mirror_offset, comp_mirror); 1279 } 1280 1281 oop java_lang_Class::component_mirror(oop java_class) { 1282 assert(_component_mirror_offset != 0, "must be set"); 1283 return java_class->obj_field(_component_mirror_offset); 1284 } 1285 1286 oop java_lang_Class::init_lock(oop java_class) { 1287 assert(_init_lock_offset != 0, "must be set"); 1288 return java_class->obj_field(_init_lock_offset); 1289 } 1290 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) { 1291 assert(_init_lock_offset != 0, "must be set"); 1292 java_class->obj_field_put(_init_lock_offset, init_lock); 1293 } 1294 1295 objArrayOop java_lang_Class::signers(oop java_class) { 1296 assert(_signers_offset != 0, "must be set"); 1297 return (objArrayOop)java_class->obj_field(_signers_offset); 1298 } 1299 1300 oop java_lang_Class::class_data(oop java_class) { 1301 assert(_classData_offset != 0, "must be set"); 1302 return java_class->obj_field(_classData_offset); 1303 } 1304 void java_lang_Class::set_class_data(oop java_class, oop class_data) { 1305 assert(_classData_offset != 0, "must be set"); 1306 java_class->obj_field_put(_classData_offset, class_data); 1307 } 1308 1309 void java_lang_Class::set_reflection_data(oop java_class, oop reflection_data) { 1310 assert(_reflectionData_offset != 0, "must be set"); 1311 java_class->obj_field_put(_reflectionData_offset, reflection_data); 1312 } 1313 1314 void java_lang_Class::set_class_loader(oop java_class, oop loader) { 1315 assert(_class_loader_offset != 0, "offsets should have been initialized"); 1316 java_class->obj_field_put(_class_loader_offset, loader); 1317 } 1318 1319 oop java_lang_Class::class_loader(oop java_class) { 1320 assert(_class_loader_offset != 0, "must be set"); 1321 return java_class->obj_field(_class_loader_offset); 1322 } 1323 1324 oop java_lang_Class::module(oop java_class) { 1325 assert(_module_offset != 0, "must be set"); 1326 return java_class->obj_field(_module_offset); 1327 } 1328 1329 void java_lang_Class::set_module(oop java_class, oop module) { 1330 assert(_module_offset != 0, "must be set"); 1331 java_class->obj_field_put(_module_offset, module); 1332 } 1333 1334 oop java_lang_Class::name(Handle java_class, TRAPS) { 1335 assert(_name_offset != 0, "must be set"); 1336 oop o = java_class->obj_field(_name_offset); 1337 if (o == nullptr) { 1338 o = StringTable::intern(as_external_name(java_class()), THREAD); 1339 java_class->obj_field_put(_name_offset, o); 1340 } 1341 return o; 1342 } 1343 1344 oop java_lang_Class::source_file(oop java_class) { 1345 assert(_source_file_offset != 0, "must be set"); 1346 return java_class->obj_field(_source_file_offset); 1347 } 1348 1349 void java_lang_Class::set_source_file(oop java_class, oop source_file) { 1350 assert(_source_file_offset != 0, "must be set"); 1351 java_class->obj_field_put(_source_file_offset, source_file); 1352 } 1353 1354 void java_lang_Class::set_is_primitive(oop java_class) { 1355 assert(_is_primitive_offset != 0, "must be set"); 1356 java_class->bool_field_put(_is_primitive_offset, true); 1357 } 1358 1359 1360 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) { 1361 // Mirrors for basic types have a null klass field, which makes them special. 1362 oop java_class = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(nullptr, CHECK_NULL); 1363 if (type != T_VOID) { 1364 Klass* aklass = Universe::typeArrayKlass(type); 1365 assert(aklass != nullptr, "correct bootstrap"); 1366 release_set_array_klass(java_class, aklass); 1367 } 1368 #ifdef ASSERT 1369 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(vmClasses::Class_klass()); 1370 assert(static_oop_field_count(java_class) == 0, "should have been zeroed by allocation"); 1371 #endif 1372 set_modifiers(java_class, JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC); 1373 set_is_primitive(java_class); 1374 return java_class; 1375 } 1376 1377 void java_lang_Class::set_klass(oop java_class, Klass* klass) { 1378 assert(is_instance(java_class), "must be a Class object"); 1379 java_class->metadata_field_put(_klass_offset, klass); 1380 } 1381 1382 1383 void java_lang_Class::print_signature(oop java_class, outputStream* st) { 1384 assert(is_instance(java_class), "must be a Class object"); 1385 Symbol* name = nullptr; 1386 bool is_instance = false; 1387 if (is_primitive(java_class)) { 1388 name = vmSymbols::type_signature(primitive_type(java_class)); 1389 } else { 1390 Klass* k = as_Klass(java_class); 1391 is_instance = k->is_instance_klass(); 1392 name = k->name(); 1393 } 1394 if (name == nullptr) { 1395 st->print("<null>"); 1396 return; 1397 } 1398 if (is_instance) st->print("L"); 1399 st->write((char*) name->base(), (int) name->utf8_length()); 1400 if (is_instance) st->print(";"); 1401 } 1402 1403 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) { 1404 assert(is_instance(java_class), "must be a Class object"); 1405 Symbol* name; 1406 if (is_primitive(java_class)) { 1407 name = vmSymbols::type_signature(primitive_type(java_class)); 1408 // Because this can create a new symbol, the caller has to decrement 1409 // the refcount, so make adjustment here and below for symbols returned 1410 // that are not created or incremented due to a successful lookup. 1411 name->increment_refcount(); 1412 } else { 1413 Klass* k = as_Klass(java_class); 1414 if (!k->is_instance_klass()) { 1415 name = k->name(); 1416 name->increment_refcount(); 1417 } else { 1418 ResourceMark rm; 1419 const char* sigstr = k->signature_name(); 1420 int siglen = (int) strlen(sigstr); 1421 if (!intern_if_not_found) { 1422 name = SymbolTable::probe(sigstr, siglen); 1423 } else { 1424 name = SymbolTable::new_symbol(sigstr, siglen); 1425 } 1426 } 1427 } 1428 return name; 1429 } 1430 1431 // Returns the Java name for this Java mirror (Resource allocated) 1432 // See Klass::external_name(). 1433 // For primitive type Java mirrors, its type name is returned. 1434 const char* java_lang_Class::as_external_name(oop java_class) { 1435 assert(is_instance(java_class), "must be a Class object"); 1436 const char* name = nullptr; 1437 if (is_primitive(java_class)) { 1438 name = type2name(primitive_type(java_class)); 1439 } else { 1440 name = as_Klass(java_class)->external_name(); 1441 } 1442 if (name == nullptr) { 1443 name = "<null>"; 1444 } 1445 return name; 1446 } 1447 1448 Klass* java_lang_Class::array_klass_acquire(oop java_class) { 1449 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset)); 1450 assert(k == nullptr || (k->is_klass() && k->is_array_klass()), "should be array klass"); 1451 return k; 1452 } 1453 1454 1455 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) { 1456 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass"); 1457 java_class->release_metadata_field_put(_array_klass_offset, klass); 1458 } 1459 1460 1461 BasicType java_lang_Class::primitive_type(oop java_class) { 1462 assert(is_primitive(java_class), "just checking"); 1463 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1464 BasicType type = T_VOID; 1465 if (ak != nullptr) { 1466 // Note: create_basic_type_mirror above initializes ak to a non-null value. 1467 type = ArrayKlass::cast(ak)->element_type(); 1468 } else { 1469 assert(java_class == Universe::void_mirror(), "only valid non-array primitive"); 1470 } 1471 #ifdef ASSERT 1472 if (CDSConfig::is_dumping_heap()) { 1473 oop mirror = Universe::java_mirror(type); 1474 oop scratch_mirror = HeapShared::scratch_java_mirror(type); 1475 assert(java_class == mirror || java_class == scratch_mirror, "must be consistent"); 1476 } else { 1477 assert(Universe::java_mirror(type) == java_class, "must be consistent"); 1478 } 1479 #endif 1480 return type; 1481 } 1482 1483 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) { 1484 assert(is_instance(java_class), "must be a Class object"); 1485 if (is_primitive(java_class)) { 1486 if (reference_klass != nullptr) 1487 (*reference_klass) = nullptr; 1488 return primitive_type(java_class); 1489 } else { 1490 if (reference_klass != nullptr) 1491 (*reference_klass) = as_Klass(java_class); 1492 return T_OBJECT; 1493 } 1494 } 1495 1496 1497 oop java_lang_Class::primitive_mirror(BasicType t) { 1498 oop mirror = Universe::java_mirror(t); 1499 assert(mirror != nullptr && mirror->is_a(vmClasses::Class_klass()), "must be a Class"); 1500 assert(is_primitive(mirror), "must be primitive"); 1501 return mirror; 1502 } 1503 1504 #define CLASS_FIELDS_DO(macro) \ 1505 macro(_classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false); \ 1506 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \ 1507 macro(_component_mirror_offset, k, "componentType", class_signature, false); \ 1508 macro(_module_offset, k, "module", module_signature, false); \ 1509 macro(_name_offset, k, "name", string_signature, false); \ 1510 macro(_classData_offset, k, "classData", object_signature, false); \ 1511 macro(_reflectionData_offset, k, "reflectionData", java_lang_ref_SoftReference_signature, false); \ 1512 macro(_signers_offset, k, "signers", object_array_signature, false); \ 1513 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), char_signature, false); \ 1514 macro(_protection_domain_offset, k, "protectionDomain", java_security_ProtectionDomain_signature, false); \ 1515 macro(_is_primitive_offset, k, "primitive", bool_signature, false); 1516 1517 void java_lang_Class::compute_offsets() { 1518 if (_offsets_computed) { 1519 return; 1520 } 1521 1522 _offsets_computed = true; 1523 1524 InstanceKlass* k = vmClasses::Class_klass(); 1525 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1526 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 1527 } 1528 1529 #if INCLUDE_CDS 1530 void java_lang_Class::serialize_offsets(SerializeClosure* f) { 1531 f->do_bool(&_offsets_computed); 1532 1533 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1534 1535 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 1536 } 1537 #endif 1538 1539 int java_lang_Class::classRedefinedCount(oop the_class_mirror) { 1540 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized"); 1541 return the_class_mirror->int_field(_classRedefinedCount_offset); 1542 } 1543 1544 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) { 1545 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized"); 1546 the_class_mirror->int_field_put(_classRedefinedCount_offset, value); 1547 } 1548 1549 int java_lang_Class::modifiers(oop the_class_mirror) { 1550 assert(_modifiers_offset != 0, "offsets should have been initialized"); 1551 return the_class_mirror->char_field(_modifiers_offset); 1552 } 1553 1554 void java_lang_Class::set_modifiers(oop the_class_mirror, u2 value) { 1555 assert(_modifiers_offset != 0, "offsets should have been initialized"); 1556 the_class_mirror->char_field_put(_modifiers_offset, value); 1557 } 1558 1559 1560 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the 1561 // platform thread structure, and a eetop offset which was used for thread 1562 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures 1563 // merged, so in the HotSpot VM we just use the eetop field for the thread 1564 // instead of the privateInfo_offset. 1565 // 1566 // Note: The stackSize field is only present starting in 1.4. 1567 1568 int java_lang_Thread_FieldHolder::_group_offset; 1569 int java_lang_Thread_FieldHolder::_priority_offset; 1570 int java_lang_Thread_FieldHolder::_stackSize_offset; 1571 int java_lang_Thread_FieldHolder::_daemon_offset; 1572 int java_lang_Thread_FieldHolder::_thread_status_offset; 1573 1574 #define THREAD_FIELD_HOLDER_FIELDS_DO(macro) \ 1575 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \ 1576 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \ 1577 macro(_stackSize_offset, k, "stackSize", long_signature, false); \ 1578 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \ 1579 macro(_thread_status_offset, k, "threadStatus", int_signature, false) 1580 1581 void java_lang_Thread_FieldHolder::compute_offsets() { 1582 assert(_group_offset == 0, "offsets should be initialized only once"); 1583 1584 InstanceKlass* k = vmClasses::Thread_FieldHolder_klass(); 1585 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1586 } 1587 1588 #if INCLUDE_CDS 1589 void java_lang_Thread_FieldHolder::serialize_offsets(SerializeClosure* f) { 1590 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1591 } 1592 #endif 1593 1594 oop java_lang_Thread_FieldHolder::threadGroup(oop holder) { 1595 return holder->obj_field(_group_offset); 1596 } 1597 1598 ThreadPriority java_lang_Thread_FieldHolder::priority(oop holder) { 1599 return (ThreadPriority)holder->int_field(_priority_offset); 1600 } 1601 1602 void java_lang_Thread_FieldHolder::set_priority(oop holder, ThreadPriority priority) { 1603 holder->int_field_put(_priority_offset, priority); 1604 } 1605 1606 jlong java_lang_Thread_FieldHolder::stackSize(oop holder) { 1607 return holder->long_field(_stackSize_offset); 1608 } 1609 1610 bool java_lang_Thread_FieldHolder::is_daemon(oop holder) { 1611 return holder->bool_field(_daemon_offset) != 0; 1612 } 1613 1614 void java_lang_Thread_FieldHolder::set_daemon(oop holder, bool val) { 1615 assert(val, "daemon status is never turned off"); 1616 holder->bool_field_put(_daemon_offset, val); 1617 } 1618 1619 void java_lang_Thread_FieldHolder::set_thread_status(oop holder, JavaThreadStatus status) { 1620 holder->int_field_put(_thread_status_offset, static_cast<int>(status)); 1621 } 1622 1623 JavaThreadStatus java_lang_Thread_FieldHolder::get_thread_status(oop holder) { 1624 return static_cast<JavaThreadStatus>(holder->int_field(_thread_status_offset)); 1625 } 1626 1627 1628 int java_lang_Thread_Constants::_static_VTHREAD_GROUP_offset = 0; 1629 1630 #define THREAD_CONSTANTS_STATIC_FIELDS_DO(macro) \ 1631 macro(_static_VTHREAD_GROUP_offset, k, "VTHREAD_GROUP", threadgroup_signature, true); 1632 1633 void java_lang_Thread_Constants::compute_offsets() { 1634 assert(_static_VTHREAD_GROUP_offset == 0, "offsets should be initialized only once"); 1635 1636 InstanceKlass* k = vmClasses::Thread_Constants_klass(); 1637 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1638 } 1639 1640 #if INCLUDE_CDS 1641 void java_lang_Thread_Constants::serialize_offsets(SerializeClosure* f) { 1642 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1643 } 1644 #endif 1645 1646 oop java_lang_Thread_Constants::get_VTHREAD_GROUP() { 1647 InstanceKlass* k = vmClasses::Thread_Constants_klass(); 1648 oop base = k->static_field_base_raw(); 1649 return base->obj_field(_static_VTHREAD_GROUP_offset); 1650 } 1651 1652 1653 int java_lang_Thread::_holder_offset; 1654 int java_lang_Thread::_name_offset; 1655 int java_lang_Thread::_contextClassLoader_offset; 1656 int java_lang_Thread::_eetop_offset; 1657 int java_lang_Thread::_jvmti_thread_state_offset; 1658 int java_lang_Thread::_jvmti_VTMS_transition_disable_count_offset; 1659 int java_lang_Thread::_jvmti_is_in_VTMS_transition_offset; 1660 int java_lang_Thread::_interrupted_offset; 1661 int java_lang_Thread::_interruptLock_offset; 1662 int java_lang_Thread::_tid_offset; 1663 int java_lang_Thread::_continuation_offset; 1664 int java_lang_Thread::_park_blocker_offset; 1665 int java_lang_Thread::_scopedValueBindings_offset; 1666 JFR_ONLY(int java_lang_Thread::_jfr_epoch_offset;) 1667 1668 #define THREAD_FIELDS_DO(macro) \ 1669 macro(_holder_offset, k, "holder", thread_fieldholder_signature, false); \ 1670 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 1671 macro(_contextClassLoader_offset, k, "contextClassLoader", classloader_signature, false); \ 1672 macro(_eetop_offset, k, "eetop", long_signature, false); \ 1673 macro(_interrupted_offset, k, "interrupted", bool_signature, false); \ 1674 macro(_interruptLock_offset, k, "interruptLock", object_signature, false); \ 1675 macro(_tid_offset, k, "tid", long_signature, false); \ 1676 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \ 1677 macro(_continuation_offset, k, "cont", continuation_signature, false); \ 1678 macro(_scopedValueBindings_offset, k, "scopedValueBindings", object_signature, false); 1679 1680 void java_lang_Thread::compute_offsets() { 1681 assert(_holder_offset == 0, "offsets should be initialized only once"); 1682 1683 InstanceKlass* k = vmClasses::Thread_klass(); 1684 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1685 THREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 1686 } 1687 1688 #if INCLUDE_CDS 1689 void java_lang_Thread::serialize_offsets(SerializeClosure* f) { 1690 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1691 THREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 1692 } 1693 #endif 1694 1695 JavaThread* java_lang_Thread::thread(oop java_thread) { 1696 return reinterpret_cast<JavaThread*>(java_thread->address_field(_eetop_offset)); 1697 } 1698 1699 JavaThread* java_lang_Thread::thread_acquire(oop java_thread) { 1700 return reinterpret_cast<JavaThread*>(java_thread->address_field_acquire(_eetop_offset)); 1701 } 1702 1703 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) { 1704 java_thread->address_field_put(_eetop_offset, (address)thread); 1705 } 1706 1707 void java_lang_Thread::release_set_thread(oop java_thread, JavaThread* thread) { 1708 java_thread->release_address_field_put(_eetop_offset, (address)thread); 1709 } 1710 1711 JvmtiThreadState* java_lang_Thread::jvmti_thread_state(oop java_thread) { 1712 return (JvmtiThreadState*)java_thread->address_field(_jvmti_thread_state_offset); 1713 } 1714 1715 void java_lang_Thread::set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state) { 1716 java_thread->address_field_put(_jvmti_thread_state_offset, (address)state); 1717 } 1718 1719 int java_lang_Thread::VTMS_transition_disable_count(oop java_thread) { 1720 return java_thread->int_field(_jvmti_VTMS_transition_disable_count_offset); 1721 } 1722 1723 void java_lang_Thread::inc_VTMS_transition_disable_count(oop java_thread) { 1724 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked"); 1725 int val = VTMS_transition_disable_count(java_thread); 1726 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val + 1); 1727 } 1728 1729 void java_lang_Thread::dec_VTMS_transition_disable_count(oop java_thread) { 1730 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked"); 1731 int val = VTMS_transition_disable_count(java_thread); 1732 assert(val > 0, "VTMS_transition_disable_count should never be negative"); 1733 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val - 1); 1734 } 1735 1736 bool java_lang_Thread::is_in_VTMS_transition(oop java_thread) { 1737 return java_thread->bool_field_volatile(_jvmti_is_in_VTMS_transition_offset); 1738 } 1739 1740 void java_lang_Thread::set_is_in_VTMS_transition(oop java_thread, bool val) { 1741 assert(is_in_VTMS_transition(java_thread) != val, "already %s transition", val ? "inside" : "outside"); 1742 java_thread->bool_field_put_volatile(_jvmti_is_in_VTMS_transition_offset, val); 1743 } 1744 1745 int java_lang_Thread::is_in_VTMS_transition_offset() { 1746 return _jvmti_is_in_VTMS_transition_offset; 1747 } 1748 1749 void java_lang_Thread::clear_scopedValueBindings(oop java_thread) { 1750 assert(java_thread != nullptr, "need a java_lang_Thread pointer here"); 1751 java_thread->obj_field_put(_scopedValueBindings_offset, nullptr); 1752 } 1753 1754 oop java_lang_Thread::holder(oop java_thread) { 1755 // Note: may return null if the thread is still attaching 1756 return java_thread->obj_field(_holder_offset); 1757 } 1758 oop java_lang_Thread::interrupt_lock(oop java_thread) { 1759 return java_thread->obj_field(_interruptLock_offset); 1760 } 1761 1762 bool java_lang_Thread::interrupted(oop java_thread) { 1763 // Make sure the caller can safely access oops. 1764 assert(Thread::current()->is_VM_thread() || 1765 (JavaThread::current()->thread_state() != _thread_blocked && 1766 JavaThread::current()->thread_state() != _thread_in_native), 1767 "Unsafe access to oop"); 1768 return java_thread->bool_field_volatile(_interrupted_offset); 1769 } 1770 1771 void java_lang_Thread::set_interrupted(oop java_thread, bool val) { 1772 // Make sure the caller can safely access oops. 1773 assert(Thread::current()->is_VM_thread() || 1774 (JavaThread::current()->thread_state() != _thread_blocked && 1775 JavaThread::current()->thread_state() != _thread_in_native), 1776 "Unsafe access to oop"); 1777 java_thread->bool_field_put_volatile(_interrupted_offset, val); 1778 } 1779 1780 1781 oop java_lang_Thread::name(oop java_thread) { 1782 return java_thread->obj_field(_name_offset); 1783 } 1784 1785 1786 void java_lang_Thread::set_name(oop java_thread, oop name) { 1787 java_thread->obj_field_put(_name_offset, name); 1788 } 1789 1790 // Convenience macros for setting and getting Thread fields that 1791 // are actually stored in the FieldHolder object of the thread. 1792 // The FieldHolder can be null whilst a thread is attaching via 1793 // JNI, and when the main thread is attaching. 1794 1795 // The default value should be the default/zero initialized value 1796 // of the field as it would be in java.lang.Thread.FieldHolder. 1797 #define GET_FIELDHOLDER_FIELD(java_thread, field, default_val) \ 1798 { \ 1799 oop holder = java_lang_Thread::holder(java_thread); \ 1800 if (holder != nullptr) \ 1801 return java_lang_Thread_FieldHolder::field(holder); \ 1802 else \ 1803 return default_val; \ 1804 } 1805 1806 // We should never be trying to set a field of an attaching thread. 1807 #define SET_FIELDHOLDER_FIELD(java_thread, field, value) \ 1808 { \ 1809 oop holder = java_lang_Thread::holder(java_thread); \ 1810 assert(holder != nullptr, "Thread not fully initialized"); \ 1811 java_lang_Thread_FieldHolder::set_##field(holder, value); \ 1812 } 1813 1814 1815 ThreadPriority java_lang_Thread::priority(oop java_thread) { 1816 GET_FIELDHOLDER_FIELD(java_thread, priority, (ThreadPriority)0); 1817 } 1818 1819 1820 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) { 1821 SET_FIELDHOLDER_FIELD(java_thread, priority, priority) 1822 } 1823 1824 1825 oop java_lang_Thread::threadGroup(oop java_thread) { 1826 GET_FIELDHOLDER_FIELD(java_thread, threadGroup, nullptr); 1827 } 1828 1829 1830 bool java_lang_Thread::is_alive(oop java_thread) { 1831 JavaThread* thr = java_lang_Thread::thread(java_thread); 1832 return (thr != nullptr); 1833 } 1834 1835 1836 bool java_lang_Thread::is_daemon(oop java_thread) { 1837 GET_FIELDHOLDER_FIELD(java_thread, is_daemon, false); 1838 } 1839 1840 1841 void java_lang_Thread::set_daemon(oop java_thread) { 1842 SET_FIELDHOLDER_FIELD(java_thread, daemon, true); 1843 } 1844 1845 oop java_lang_Thread::context_class_loader(oop java_thread) { 1846 return java_thread->obj_field(_contextClassLoader_offset); 1847 } 1848 1849 1850 jlong java_lang_Thread::stackSize(oop java_thread) { 1851 GET_FIELDHOLDER_FIELD(java_thread, stackSize, 0); 1852 } 1853 1854 // Write the thread status value to threadStatus field in java.lang.Thread java class. 1855 void java_lang_Thread::set_thread_status(oop java_thread, JavaThreadStatus status) { 1856 SET_FIELDHOLDER_FIELD(java_thread, thread_status, status); 1857 } 1858 1859 // Read thread status value from threadStatus field in java.lang.Thread java class. 1860 JavaThreadStatus java_lang_Thread::get_thread_status(oop java_thread) { 1861 // Make sure the caller is operating on behalf of the VM or is 1862 // running VM code (state == _thread_in_vm). 1863 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() || 1864 JavaThread::current()->thread_state() == _thread_in_vm, 1865 "Java Thread is not running in vm"); 1866 GET_FIELDHOLDER_FIELD(java_thread, get_thread_status, JavaThreadStatus::NEW /* not initialized */); 1867 } 1868 1869 ByteSize java_lang_Thread::thread_id_offset() { 1870 return in_ByteSize(_tid_offset); 1871 } 1872 1873 oop java_lang_Thread::park_blocker(oop java_thread) { 1874 return java_thread->obj_field(_park_blocker_offset); 1875 } 1876 1877 oop java_lang_Thread::async_get_stack_trace(oop java_thread, TRAPS) { 1878 ThreadsListHandle tlh(JavaThread::current()); 1879 JavaThread* thread; 1880 bool is_virtual = java_lang_VirtualThread::is_instance(java_thread); 1881 if (is_virtual) { 1882 oop carrier_thread = java_lang_VirtualThread::carrier_thread(java_thread); 1883 if (carrier_thread == nullptr) { 1884 return nullptr; 1885 } 1886 thread = java_lang_Thread::thread(carrier_thread); 1887 } else { 1888 thread = java_lang_Thread::thread(java_thread); 1889 } 1890 if (thread == nullptr) { 1891 return nullptr; 1892 } 1893 1894 class GetStackTraceClosure : public HandshakeClosure { 1895 public: 1896 const Handle _java_thread; 1897 int _depth; 1898 bool _retry_handshake; 1899 GrowableArray<Method*>* _methods; 1900 GrowableArray<int>* _bcis; 1901 1902 GetStackTraceClosure(Handle java_thread) : 1903 HandshakeClosure("GetStackTraceClosure"), _java_thread(java_thread), _depth(0), _retry_handshake(false), 1904 _methods(nullptr), _bcis(nullptr) { 1905 } 1906 ~GetStackTraceClosure() { 1907 delete _methods; 1908 delete _bcis; 1909 } 1910 1911 bool read_reset_retry() { 1912 bool ret = _retry_handshake; 1913 // If we re-execute the handshake this method need to return false 1914 // when the handshake cannot be performed. (E.g. thread terminating) 1915 _retry_handshake = false; 1916 return ret; 1917 } 1918 1919 void do_thread(Thread* th) { 1920 if (!Thread::current()->is_Java_thread()) { 1921 _retry_handshake = true; 1922 return; 1923 } 1924 1925 JavaThread* thread = JavaThread::cast(th); 1926 1927 if (!thread->has_last_Java_frame()) { 1928 return; 1929 } 1930 1931 bool carrier = false; 1932 if (java_lang_VirtualThread::is_instance(_java_thread())) { 1933 // if (thread->vthread() != _java_thread()) // We might be inside a System.executeOnCarrierThread 1934 const ContinuationEntry* ce = thread->vthread_continuation(); 1935 if (ce == nullptr || ce->cont_oop(thread) != java_lang_VirtualThread::continuation(_java_thread())) { 1936 return; // not mounted 1937 } 1938 } else { 1939 carrier = (thread->vthread_continuation() != nullptr); 1940 } 1941 1942 const int max_depth = MaxJavaStackTraceDepth; 1943 const bool skip_hidden = !ShowHiddenFrames; 1944 1945 // Pick minimum length that will cover most cases 1946 int init_length = 64; 1947 _methods = new (mtInternal) GrowableArray<Method*>(init_length, mtInternal); 1948 _bcis = new (mtInternal) GrowableArray<int>(init_length, mtInternal); 1949 1950 int total_count = 0; 1951 for (vframeStream vfst(thread, false, false, carrier); // we don't process frames as we don't care about oops 1952 !vfst.at_end() && (max_depth == 0 || max_depth != total_count); 1953 vfst.next()) { 1954 1955 if (skip_hidden && (vfst.method()->is_hidden() || 1956 vfst.method()->is_continuation_enter_intrinsic())) { 1957 continue; 1958 } 1959 1960 _methods->push(vfst.method()); 1961 _bcis->push(vfst.bci()); 1962 total_count++; 1963 } 1964 1965 _depth = total_count; 1966 } 1967 }; 1968 1969 // Handshake with target 1970 ResourceMark rm(THREAD); 1971 HandleMark hm(THREAD); 1972 GetStackTraceClosure gstc(Handle(THREAD, java_thread)); 1973 do { 1974 Handshake::execute(&gstc, &tlh, thread); 1975 } while (gstc.read_reset_retry()); 1976 1977 // Stop if no stack trace is found. 1978 if (gstc._depth == 0) { 1979 return nullptr; 1980 } 1981 1982 // Convert to StackTraceElement array 1983 InstanceKlass* k = vmClasses::StackTraceElement_klass(); 1984 assert(k != nullptr, "must be loaded in 1.4+"); 1985 if (k->should_be_initialized()) { 1986 k->initialize(CHECK_NULL); 1987 } 1988 objArrayHandle trace = oopFactory::new_objArray_handle(k, gstc._depth, CHECK_NULL); 1989 1990 for (int i = 0; i < gstc._depth; i++) { 1991 methodHandle method(THREAD, gstc._methods->at(i)); 1992 oop element = java_lang_StackTraceElement::create(method, 1993 gstc._bcis->at(i), 1994 CHECK_NULL); 1995 trace->obj_at_put(i, element); 1996 } 1997 1998 return trace(); 1999 } 2000 2001 const char* java_lang_Thread::thread_status_name(oop java_thread) { 2002 JavaThreadStatus status = get_thread_status(java_thread); 2003 switch (status) { 2004 case JavaThreadStatus::NEW : return "NEW"; 2005 case JavaThreadStatus::RUNNABLE : return "RUNNABLE"; 2006 case JavaThreadStatus::SLEEPING : return "TIMED_WAITING (sleeping)"; 2007 case JavaThreadStatus::IN_OBJECT_WAIT : return "WAITING (on object monitor)"; 2008 case JavaThreadStatus::IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)"; 2009 case JavaThreadStatus::PARKED : return "WAITING (parking)"; 2010 case JavaThreadStatus::PARKED_TIMED : return "TIMED_WAITING (parking)"; 2011 case JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)"; 2012 case JavaThreadStatus::TERMINATED : return "TERMINATED"; 2013 default : return "UNKNOWN"; 2014 }; 2015 } 2016 int java_lang_ThreadGroup::_parent_offset; 2017 int java_lang_ThreadGroup::_name_offset; 2018 int java_lang_ThreadGroup::_maxPriority_offset; 2019 int java_lang_ThreadGroup::_daemon_offset; 2020 2021 oop java_lang_ThreadGroup::parent(oop java_thread_group) { 2022 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 2023 return java_thread_group->obj_field(_parent_offset); 2024 } 2025 2026 // ("name as oop" accessor is not necessary) 2027 2028 const char* java_lang_ThreadGroup::name(oop java_thread_group) { 2029 oop name = java_thread_group->obj_field(_name_offset); 2030 // ThreadGroup.name can be null 2031 if (name != nullptr) { 2032 return java_lang_String::as_utf8_string(name); 2033 } 2034 return nullptr; 2035 } 2036 2037 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) { 2038 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 2039 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset); 2040 } 2041 2042 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) { 2043 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 2044 return java_thread_group->bool_field(_daemon_offset) != 0; 2045 } 2046 2047 #define THREADGROUP_FIELDS_DO(macro) \ 2048 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \ 2049 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 2050 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \ 2051 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); 2052 2053 void java_lang_ThreadGroup::compute_offsets() { 2054 assert(_parent_offset == 0, "offsets should be initialized only once"); 2055 2056 InstanceKlass* k = vmClasses::ThreadGroup_klass(); 2057 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2058 } 2059 2060 #if INCLUDE_CDS 2061 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) { 2062 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2063 } 2064 #endif 2065 2066 2067 // java_lang_VirtualThread 2068 2069 int java_lang_VirtualThread::static_vthread_scope_offset; 2070 int java_lang_VirtualThread::_carrierThread_offset; 2071 int java_lang_VirtualThread::_continuation_offset; 2072 int java_lang_VirtualThread::_state_offset; 2073 int java_lang_VirtualThread::_next_offset; 2074 int java_lang_VirtualThread::_onWaitingList_offset; 2075 int java_lang_VirtualThread::_notified_offset; 2076 int java_lang_VirtualThread::_timeout_offset; 2077 int java_lang_VirtualThread::_objectWaiter_offset; 2078 2079 #define VTHREAD_FIELDS_DO(macro) \ 2080 macro(static_vthread_scope_offset, k, "VTHREAD_SCOPE", continuationscope_signature, true); \ 2081 macro(_carrierThread_offset, k, "carrierThread", thread_signature, false); \ 2082 macro(_continuation_offset, k, "cont", continuation_signature, false); \ 2083 macro(_state_offset, k, "state", int_signature, false); \ 2084 macro(_next_offset, k, "next", vthread_signature, false); \ 2085 macro(_onWaitingList_offset, k, "onWaitingList", bool_signature, false); \ 2086 macro(_notified_offset, k, "notified", bool_signature, false); \ 2087 macro(_timeout_offset, k, "timeout", long_signature, false); 2088 2089 2090 void java_lang_VirtualThread::compute_offsets() { 2091 InstanceKlass* k = vmClasses::VirtualThread_klass(); 2092 VTHREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2093 VTHREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 2094 } 2095 2096 bool java_lang_VirtualThread::is_instance(oop obj) { 2097 return obj != nullptr && is_subclass(obj->klass()); 2098 } 2099 2100 oop java_lang_VirtualThread::carrier_thread(oop vthread) { 2101 oop thread = vthread->obj_field(_carrierThread_offset); 2102 return thread; 2103 } 2104 2105 oop java_lang_VirtualThread::continuation(oop vthread) { 2106 oop cont = vthread->obj_field(_continuation_offset); 2107 return cont; 2108 } 2109 2110 int java_lang_VirtualThread::state(oop vthread) { 2111 return vthread->int_field_acquire(_state_offset); 2112 } 2113 2114 void java_lang_VirtualThread::set_state(oop vthread, int state) { 2115 vthread->release_int_field_put(_state_offset, state); 2116 } 2117 2118 int java_lang_VirtualThread::cmpxchg_state(oop vthread, int old_state, int new_state) { 2119 jint* addr = vthread->field_addr<jint>(_state_offset); 2120 int res = Atomic::cmpxchg(addr, old_state, new_state); 2121 return res; 2122 } 2123 2124 oop java_lang_VirtualThread::next(oop vthread) { 2125 return vthread->obj_field(_next_offset); 2126 } 2127 2128 void java_lang_VirtualThread::set_next(oop vthread, oop next_vthread) { 2129 vthread->obj_field_put(_next_offset, next_vthread); 2130 } 2131 2132 // Add vthread to the waiting list if it's not already in it. Multiple threads 2133 // could be trying to add vthread to the list at the same time, so we control 2134 // access with a cmpxchg on onWaitingList. The winner adds vthread to the list. 2135 // Method returns true if we added vthread to the list, false otherwise. 2136 bool java_lang_VirtualThread::set_onWaitingList(oop vthread, OopHandle& list_head) { 2137 jboolean* addr = vthread->field_addr<jboolean>(_onWaitingList_offset); 2138 jboolean vthread_on_list = Atomic::load(addr); 2139 if (!vthread_on_list) { 2140 vthread_on_list = Atomic::cmpxchg(addr, (jboolean)JNI_FALSE, (jboolean)JNI_TRUE); 2141 if (!vthread_on_list) { 2142 for (;;) { 2143 oop head = list_head.resolve(); 2144 java_lang_VirtualThread::set_next(vthread, head); 2145 if (list_head.cmpxchg(head, vthread) == head) return true; 2146 } 2147 } 2148 } 2149 return false; // already on waiting list 2150 } 2151 2152 void java_lang_VirtualThread::set_notified(oop vthread, jboolean value) { 2153 vthread->bool_field_put_volatile(_notified_offset, value); 2154 } 2155 2156 jlong java_lang_VirtualThread::timeout(oop vthread) { 2157 return vthread->long_field(_timeout_offset); 2158 } 2159 2160 void java_lang_VirtualThread::set_timeout(oop vthread, jlong value) { 2161 vthread->long_field_put(_timeout_offset, value); 2162 } 2163 2164 JavaThreadStatus java_lang_VirtualThread::map_state_to_thread_status(int state) { 2165 JavaThreadStatus status = JavaThreadStatus::NEW; 2166 switch (state & ~SUSPENDED) { 2167 case NEW: 2168 status = JavaThreadStatus::NEW; 2169 break; 2170 case STARTED: 2171 case RUNNING: 2172 case PARKING: 2173 case TIMED_PARKING: 2174 case UNPARKED: 2175 case YIELDING: 2176 case YIELDED: 2177 case UNBLOCKED: 2178 case WAITING: 2179 case TIMED_WAITING: 2180 status = JavaThreadStatus::RUNNABLE; 2181 break; 2182 case PARKED: 2183 case PINNED: 2184 status = JavaThreadStatus::PARKED; 2185 break; 2186 case TIMED_PARKED: 2187 case TIMED_PINNED: 2188 status = JavaThreadStatus::PARKED_TIMED; 2189 break; 2190 case BLOCKING: 2191 case BLOCKED: 2192 status = JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER; 2193 break; 2194 case WAIT: 2195 status = JavaThreadStatus::IN_OBJECT_WAIT; 2196 break; 2197 case TIMED_WAIT: 2198 status = JavaThreadStatus::IN_OBJECT_WAIT_TIMED; 2199 break; 2200 case TERMINATED: 2201 status = JavaThreadStatus::TERMINATED; 2202 break; 2203 default: 2204 ShouldNotReachHere(); 2205 } 2206 return status; 2207 } 2208 2209 ObjectMonitor* java_lang_VirtualThread::current_pending_monitor(oop vthread) { 2210 ObjectWaiter* waiter = objectWaiter(vthread); 2211 if (waiter != nullptr && waiter->at_monitorenter()) { 2212 return waiter->monitor(); 2213 } 2214 return nullptr; 2215 } 2216 2217 ObjectMonitor* java_lang_VirtualThread::current_waiting_monitor(oop vthread) { 2218 ObjectWaiter* waiter = objectWaiter(vthread); 2219 if (waiter != nullptr && waiter->is_wait()) { 2220 return waiter->monitor(); 2221 } 2222 return nullptr; 2223 } 2224 2225 bool java_lang_VirtualThread::is_preempted(oop vthread) { 2226 oop continuation = java_lang_VirtualThread::continuation(vthread); 2227 assert(continuation != nullptr, "vthread with no continuation"); 2228 stackChunkOop chunk = jdk_internal_vm_Continuation::tail(continuation); 2229 return chunk != nullptr && chunk->preempted(); 2230 } 2231 2232 #if INCLUDE_CDS 2233 void java_lang_VirtualThread::serialize_offsets(SerializeClosure* f) { 2234 VTHREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2235 VTHREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 2236 } 2237 #endif 2238 2239 // java_lang_Throwable 2240 2241 int java_lang_Throwable::_backtrace_offset; 2242 int java_lang_Throwable::_detailMessage_offset; 2243 int java_lang_Throwable::_stackTrace_offset; 2244 int java_lang_Throwable::_depth_offset; 2245 int java_lang_Throwable::_cause_offset; 2246 int java_lang_Throwable::_static_unassigned_stacktrace_offset; 2247 2248 #define THROWABLE_FIELDS_DO(macro) \ 2249 macro(_backtrace_offset, k, "backtrace", object_signature, false); \ 2250 macro(_detailMessage_offset, k, "detailMessage", string_signature, false); \ 2251 macro(_stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \ 2252 macro(_depth_offset, k, "depth", int_signature, false); \ 2253 macro(_cause_offset, k, "cause", throwable_signature, false); \ 2254 macro(_static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true) 2255 2256 void java_lang_Throwable::compute_offsets() { 2257 InstanceKlass* k = vmClasses::Throwable_klass(); 2258 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2259 } 2260 2261 #if INCLUDE_CDS 2262 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) { 2263 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2264 } 2265 #endif 2266 2267 oop java_lang_Throwable::unassigned_stacktrace() { 2268 InstanceKlass* ik = vmClasses::Throwable_klass(); 2269 oop base = ik->static_field_base_raw(); 2270 return base->obj_field(_static_unassigned_stacktrace_offset); 2271 } 2272 2273 oop java_lang_Throwable::backtrace(oop throwable) { 2274 return throwable->obj_field_acquire(_backtrace_offset); 2275 } 2276 2277 2278 void java_lang_Throwable::set_backtrace(oop throwable, oop value) { 2279 throwable->release_obj_field_put(_backtrace_offset, value); 2280 } 2281 2282 int java_lang_Throwable::depth(oop throwable) { 2283 return throwable->int_field(_depth_offset); 2284 } 2285 2286 void java_lang_Throwable::set_depth(oop throwable, int value) { 2287 throwable->int_field_put(_depth_offset, value); 2288 } 2289 2290 oop java_lang_Throwable::message(oop throwable) { 2291 return throwable->obj_field(_detailMessage_offset); 2292 } 2293 2294 const char* java_lang_Throwable::message_as_utf8(oop throwable) { 2295 oop msg = java_lang_Throwable::message(throwable); 2296 const char* msg_utf8 = nullptr; 2297 if (msg != nullptr) { 2298 msg_utf8 = java_lang_String::as_utf8_string(msg); 2299 } 2300 return msg_utf8; 2301 } 2302 2303 oop java_lang_Throwable::cause(oop throwable) { 2304 return throwable->obj_field(_cause_offset); 2305 } 2306 2307 void java_lang_Throwable::set_message(oop throwable, oop value) { 2308 throwable->obj_field_put(_detailMessage_offset, value); 2309 } 2310 2311 2312 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) { 2313 throwable->obj_field_put(_stackTrace_offset, st_element_array); 2314 } 2315 2316 void java_lang_Throwable::clear_stacktrace(oop throwable) { 2317 set_stacktrace(throwable, nullptr); 2318 } 2319 2320 2321 void java_lang_Throwable::print(oop throwable, outputStream* st) { 2322 ResourceMark rm; 2323 Klass* k = throwable->klass(); 2324 assert(k != nullptr, "just checking"); 2325 st->print("%s", k->external_name()); 2326 oop msg = message(throwable); 2327 if (msg != nullptr) { 2328 st->print(": %s", java_lang_String::as_utf8_string(msg)); 2329 } 2330 } 2331 2332 // After this many redefines, the stack trace is unreliable. 2333 const int MAX_VERSION = USHRT_MAX; 2334 2335 static inline bool version_matches(Method* method, int version) { 2336 assert(version < MAX_VERSION, "version is too big"); 2337 return method != nullptr && (method->constants()->version() == version); 2338 } 2339 2340 // This class provides a simple wrapper over the internal structure of 2341 // exception backtrace to insulate users of the backtrace from needing 2342 // to know what it looks like. 2343 // The code of this class is not GC safe. Allocations can only happen 2344 // in expand(). 2345 class BacktraceBuilder: public StackObj { 2346 friend class BacktraceIterator; 2347 private: 2348 Handle _backtrace; 2349 objArrayOop _head; 2350 typeArrayOop _methods; 2351 typeArrayOop _bcis; 2352 objArrayOop _mirrors; 2353 typeArrayOop _names; // Needed to insulate method name against redefinition. 2354 // True if the top frame of the backtrace is omitted because it shall be hidden. 2355 bool _has_hidden_top_frame; 2356 int _index; 2357 NoSafepointVerifier _nsv; 2358 2359 enum { 2360 trace_methods_offset = java_lang_Throwable::trace_methods_offset, 2361 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset, 2362 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset, 2363 trace_names_offset = java_lang_Throwable::trace_names_offset, 2364 trace_conts_offset = java_lang_Throwable::trace_conts_offset, 2365 trace_next_offset = java_lang_Throwable::trace_next_offset, 2366 trace_hidden_offset = java_lang_Throwable::trace_hidden_offset, 2367 trace_size = java_lang_Throwable::trace_size, 2368 trace_chunk_size = java_lang_Throwable::trace_chunk_size 2369 }; 2370 2371 // get info out of chunks 2372 static typeArrayOop get_methods(objArrayHandle chunk) { 2373 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset)); 2374 assert(methods != nullptr, "method array should be initialized in backtrace"); 2375 return methods; 2376 } 2377 static typeArrayOop get_bcis(objArrayHandle chunk) { 2378 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 2379 assert(bcis != nullptr, "bci array should be initialized in backtrace"); 2380 return bcis; 2381 } 2382 static objArrayOop get_mirrors(objArrayHandle chunk) { 2383 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset)); 2384 assert(mirrors != nullptr, "mirror array should be initialized in backtrace"); 2385 return mirrors; 2386 } 2387 static typeArrayOop get_names(objArrayHandle chunk) { 2388 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset)); 2389 assert(names != nullptr, "names array should be initialized in backtrace"); 2390 return names; 2391 } 2392 static bool has_hidden_top_frame(objArrayHandle chunk) { 2393 oop hidden = chunk->obj_at(trace_hidden_offset); 2394 return hidden != nullptr; 2395 } 2396 2397 public: 2398 2399 // constructor for new backtrace 2400 BacktraceBuilder(TRAPS): _head(nullptr), _methods(nullptr), _bcis(nullptr), _mirrors(nullptr), _names(nullptr), _has_hidden_top_frame(false) { 2401 expand(CHECK); 2402 _backtrace = Handle(THREAD, _head); 2403 _index = 0; 2404 } 2405 2406 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) { 2407 _methods = get_methods(backtrace); 2408 _bcis = get_bcis(backtrace); 2409 _mirrors = get_mirrors(backtrace); 2410 _names = get_names(backtrace); 2411 _has_hidden_top_frame = has_hidden_top_frame(backtrace); 2412 assert(_methods->length() == _bcis->length() && 2413 _methods->length() == _mirrors->length() && 2414 _mirrors->length() == _names->length(), 2415 "method and source information arrays should match"); 2416 2417 // head is the preallocated backtrace 2418 _head = backtrace(); 2419 _backtrace = Handle(thread, _head); 2420 _index = 0; 2421 } 2422 2423 void expand(TRAPS) { 2424 objArrayHandle old_head(THREAD, _head); 2425 PauseNoSafepointVerifier pnsv(&_nsv); 2426 2427 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK); 2428 objArrayHandle new_head(THREAD, head); 2429 2430 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK); 2431 typeArrayHandle new_methods(THREAD, methods); 2432 2433 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK); 2434 typeArrayHandle new_bcis(THREAD, bcis); 2435 2436 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK); 2437 objArrayHandle new_mirrors(THREAD, mirrors); 2438 2439 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK); 2440 typeArrayHandle new_names(THREAD, names); 2441 2442 if (!old_head.is_null()) { 2443 old_head->obj_at_put(trace_next_offset, new_head()); 2444 } 2445 new_head->obj_at_put(trace_methods_offset, new_methods()); 2446 new_head->obj_at_put(trace_bcis_offset, new_bcis()); 2447 new_head->obj_at_put(trace_mirrors_offset, new_mirrors()); 2448 new_head->obj_at_put(trace_names_offset, new_names()); 2449 new_head->obj_at_put(trace_hidden_offset, nullptr); 2450 2451 _head = new_head(); 2452 _methods = new_methods(); 2453 _bcis = new_bcis(); 2454 _mirrors = new_mirrors(); 2455 _names = new_names(); 2456 _index = 0; 2457 } 2458 2459 oop backtrace() { 2460 return _backtrace(); 2461 } 2462 2463 inline void push(Method* method, int bci, TRAPS) { 2464 // Smear the -1 bci to 0 since the array only holds unsigned 2465 // shorts. The later line number lookup would just smear the -1 2466 // to a 0 even if it could be recorded. 2467 if (bci == SynchronizationEntryBCI) bci = 0; 2468 2469 if (_index >= trace_chunk_size) { 2470 methodHandle mhandle(THREAD, method); 2471 expand(CHECK); 2472 method = mhandle(); 2473 } 2474 2475 _methods->ushort_at_put(_index, method->orig_method_idnum()); 2476 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version())); 2477 2478 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the 2479 // klass owning the symbols alive so their refcounts aren't decremented. 2480 Symbol* name = method->name(); 2481 _names->symbol_at_put(_index, name); 2482 2483 // We need to save the mirrors in the backtrace to keep the class 2484 // from being unloaded while we still have this stack trace. 2485 assert(method->method_holder()->java_mirror() != nullptr, "never push null for mirror"); 2486 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror()); 2487 2488 _index++; 2489 } 2490 2491 void set_has_hidden_top_frame() { 2492 if (!_has_hidden_top_frame) { 2493 // It would be nice to add java/lang/Boolean::TRUE here 2494 // to indicate that this backtrace has a hidden top frame. 2495 // But this code is used before TRUE is allocated. 2496 // Therefore let's just use an arbitrary legal oop 2497 // available right here. _methods is a short[]. 2498 assert(_methods != nullptr, "we need a legal oop"); 2499 _has_hidden_top_frame = true; 2500 _head->obj_at_put(trace_hidden_offset, _methods); 2501 } 2502 } 2503 }; 2504 2505 struct BacktraceElement : public StackObj { 2506 int _method_id; 2507 int _bci; 2508 int _version; 2509 Symbol* _name; 2510 Handle _mirror; 2511 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) : 2512 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {} 2513 }; 2514 2515 class BacktraceIterator : public StackObj { 2516 int _index; 2517 objArrayHandle _result; 2518 objArrayHandle _mirrors; 2519 typeArrayHandle _methods; 2520 typeArrayHandle _bcis; 2521 typeArrayHandle _names; 2522 2523 void init(objArrayHandle result, Thread* thread) { 2524 // Get method id, bci, version and mirror from chunk 2525 _result = result; 2526 if (_result.not_null()) { 2527 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result)); 2528 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result)); 2529 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result)); 2530 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result)); 2531 _index = 0; 2532 } 2533 } 2534 public: 2535 BacktraceIterator(objArrayHandle result, Thread* thread) { 2536 init(result, thread); 2537 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match"); 2538 } 2539 2540 BacktraceElement next(Thread* thread) { 2541 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)), 2542 _methods->ushort_at(_index), 2543 Backtrace::version_at(_bcis->int_at(_index)), 2544 Backtrace::bci_at(_bcis->int_at(_index)), 2545 _names->symbol_at(_index)); 2546 _index++; 2547 2548 if (_index >= java_lang_Throwable::trace_chunk_size) { 2549 int next_offset = java_lang_Throwable::trace_next_offset; 2550 // Get next chunk 2551 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset))); 2552 init(result, thread); 2553 } 2554 return e; 2555 } 2556 2557 bool repeat() { 2558 return _result.not_null() && _mirrors->obj_at(_index) != nullptr; 2559 } 2560 }; 2561 2562 2563 // Print stack trace element to resource allocated buffer 2564 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id, 2565 int version, int bci, Symbol* name) { 2566 ResourceMark rm; 2567 2568 // Get strings and string lengths 2569 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 2570 const char* klass_name = holder->external_name(); 2571 int buf_len = (int)strlen(klass_name); 2572 2573 char* method_name = name->as_C_string(); 2574 buf_len += (int)strlen(method_name); 2575 2576 char* source_file_name = nullptr; 2577 Symbol* source = Backtrace::get_source_file_name(holder, version); 2578 if (source != nullptr) { 2579 source_file_name = source->as_C_string(); 2580 buf_len += (int)strlen(source_file_name); 2581 } 2582 2583 char *module_name = nullptr, *module_version = nullptr; 2584 ModuleEntry* module = holder->module(); 2585 if (module->is_named()) { 2586 module_name = module->name()->as_C_string(); 2587 buf_len += (int)strlen(module_name); 2588 if (module->version() != nullptr) { 2589 module_version = module->version()->as_C_string(); 2590 buf_len += (int)strlen(module_version); 2591 } 2592 } 2593 2594 // Allocate temporary buffer with extra space for formatting and line number 2595 const size_t buf_size = buf_len + 64; 2596 char* buf = NEW_RESOURCE_ARRAY(char, buf_size); 2597 2598 // Print stack trace line in buffer 2599 size_t buf_off = os::snprintf_checked(buf, buf_size, "\tat %s.%s(", klass_name, method_name); 2600 2601 // Print module information 2602 if (module_name != nullptr) { 2603 if (module_version != nullptr) { 2604 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s@%s/", module_name, module_version); 2605 } else { 2606 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s/", module_name); 2607 } 2608 } 2609 2610 // The method can be null if the requested class version is gone 2611 Method* method = holder->method_with_orig_idnum(method_id, version); 2612 if (!version_matches(method, version)) { 2613 strcat(buf, "Redefined)"); 2614 } else { 2615 int line_number = Backtrace::get_line_number(method, bci); 2616 if (line_number == -2) { 2617 strcat(buf, "Native Method)"); 2618 } else { 2619 if (source_file_name != nullptr && (line_number != -1)) { 2620 // Sourcename and linenumber 2621 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s:%d)", source_file_name, line_number); 2622 } else if (source_file_name != nullptr) { 2623 // Just sourcename 2624 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s)", source_file_name); 2625 } else { 2626 // Neither sourcename nor linenumber 2627 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "Unknown Source)"); 2628 } 2629 nmethod* nm = method->code(); 2630 if (WizardMode && nm != nullptr) { 2631 os::snprintf_checked(buf + buf_off, buf_size - buf_off, "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm); 2632 } 2633 } 2634 } 2635 2636 st->print_cr("%s", buf); 2637 } 2638 2639 void java_lang_Throwable::print_stack_element(outputStream *st, Method* method, int bci) { 2640 Handle mirror (Thread::current(), method->method_holder()->java_mirror()); 2641 int method_id = method->orig_method_idnum(); 2642 int version = method->constants()->version(); 2643 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name()); 2644 } 2645 2646 /** 2647 * Print the throwable message and its stack trace plus all causes by walking the 2648 * cause chain. The output looks the same as of Throwable.printStackTrace(). 2649 */ 2650 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) { 2651 // First, print the message. 2652 print(throwable(), st); 2653 st->cr(); 2654 2655 // Now print the stack trace. 2656 JavaThread* THREAD = JavaThread::current(); // For exception macros. 2657 while (throwable.not_null()) { 2658 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable()))); 2659 if (result.is_null()) { 2660 st->print_raw_cr("\t<<no stack trace available>>"); 2661 return; 2662 } 2663 BacktraceIterator iter(result, THREAD); 2664 2665 while (iter.repeat()) { 2666 BacktraceElement bte = iter.next(THREAD); 2667 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name); 2668 } 2669 if (THREAD->can_call_java()) { 2670 // Call getCause() which doesn't necessarily return the _cause field. 2671 ExceptionMark em(THREAD); 2672 JavaValue cause(T_OBJECT); 2673 JavaCalls::call_virtual(&cause, 2674 throwable, 2675 throwable->klass(), 2676 vmSymbols::getCause_name(), 2677 vmSymbols::void_throwable_signature(), 2678 THREAD); 2679 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 2680 if (HAS_PENDING_EXCEPTION) { 2681 CLEAR_PENDING_EXCEPTION; 2682 throwable = Handle(); 2683 } else { 2684 throwable = Handle(THREAD, cause.get_oop()); 2685 if (throwable.not_null()) { 2686 st->print("Caused by: "); 2687 print(throwable(), st); 2688 st->cr(); 2689 } 2690 } 2691 } else { 2692 st->print_raw_cr("<<cannot call Java to get cause>>"); 2693 return; 2694 } 2695 } 2696 } 2697 2698 /** 2699 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace(). 2700 */ 2701 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) { 2702 assert(throwable->is_a(vmClasses::Throwable_klass()), "Throwable instance expected"); 2703 JavaValue result(T_VOID); 2704 JavaCalls::call_virtual(&result, 2705 throwable, 2706 vmClasses::Throwable_klass(), 2707 vmSymbols::printStackTrace_name(), 2708 vmSymbols::void_method_signature(), 2709 THREAD); 2710 } 2711 2712 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) { 2713 if (!StackTraceInThrowable) return; 2714 ResourceMark rm(THREAD); 2715 2716 // Start out by clearing the backtrace for this object, in case the VM 2717 // runs out of memory while allocating the stack trace 2718 set_backtrace(throwable(), nullptr); 2719 // Clear lazily constructed Java level stacktrace if refilling occurs 2720 // This is unnecessary in 1.7+ but harmless 2721 clear_stacktrace(throwable()); 2722 2723 int max_depth = MaxJavaStackTraceDepth; 2724 JavaThread* thread = THREAD; 2725 2726 BacktraceBuilder bt(CHECK); 2727 2728 // If there is no Java frame just return the method that was being called 2729 // with bci 0 2730 if (!thread->has_last_Java_frame()) { 2731 if (max_depth >= 1 && method() != nullptr) { 2732 bt.push(method(), 0, CHECK); 2733 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1); 2734 set_depth(throwable(), 1); 2735 set_backtrace(throwable(), bt.backtrace()); 2736 } 2737 return; 2738 } 2739 2740 // Instead of using vframe directly, this version of fill_in_stack_trace 2741 // basically handles everything by hand. This significantly improved the 2742 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows. 2743 // See bug 6333838 for more details. 2744 // The "ASSERT" here is to verify this method generates the exactly same stack 2745 // trace as utilizing vframe. 2746 #ifdef ASSERT 2747 vframeStream st(thread, false /* stop_at_java_call_stub */, false /* process_frames */); 2748 #endif 2749 int total_count = 0; 2750 RegisterMap map(thread, 2751 RegisterMap::UpdateMap::skip, 2752 RegisterMap::ProcessFrames::skip, 2753 RegisterMap::WalkContinuation::include); 2754 int decode_offset = 0; 2755 nmethod* nm = nullptr; 2756 bool skip_fillInStackTrace_check = false; 2757 bool skip_throwableInit_check = false; 2758 bool skip_hidden = !ShowHiddenFrames; 2759 bool show_carrier = ShowCarrierFrames; 2760 ContinuationEntry* cont_entry = thread->last_continuation(); 2761 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) { 2762 Method* method = nullptr; 2763 int bci = 0; 2764 2765 // Compiled java method case. 2766 if (decode_offset != 0) { 2767 DebugInfoReadStream stream(nm, decode_offset); 2768 decode_offset = stream.read_int(); 2769 method = (Method*)nm->metadata_at(stream.read_int()); 2770 bci = stream.read_bci(); 2771 } else { 2772 if (fr.is_first_frame()) break; 2773 2774 if (Continuation::is_continuation_enterSpecial(fr)) { 2775 assert(cont_entry == Continuation::get_continuation_entry_for_entry_frame(thread, fr), ""); 2776 if (!show_carrier && cont_entry->is_virtual_thread()) { 2777 break; 2778 } 2779 cont_entry = cont_entry->parent(); 2780 } 2781 2782 address pc = fr.pc(); 2783 if (fr.is_interpreted_frame()) { 2784 address bcp; 2785 if (!map.in_cont()) { 2786 bcp = fr.interpreter_frame_bcp(); 2787 method = fr.interpreter_frame_method(); 2788 } else { 2789 bcp = map.stack_chunk()->interpreter_frame_bcp(fr); 2790 method = map.stack_chunk()->interpreter_frame_method(fr); 2791 } 2792 bci = method->bci_from(bcp); 2793 fr = fr.sender(&map); 2794 } else { 2795 CodeBlob* cb = fr.cb(); 2796 // HMMM QQQ might be nice to have frame return nm as null if cb is non-null 2797 // but non nmethod 2798 fr = fr.sender(&map); 2799 if (cb == nullptr || !cb->is_nmethod()) { 2800 continue; 2801 } 2802 nm = cb->as_nmethod(); 2803 assert(nm->method() != nullptr, "must be"); 2804 if (nm->method()->is_native()) { 2805 method = nm->method(); 2806 bci = 0; 2807 } else { 2808 PcDesc* pd = nm->pc_desc_at(pc); 2809 decode_offset = pd->scope_decode_offset(); 2810 // if decode_offset is not equal to 0, it will execute the 2811 // "compiled java method case" at the beginning of the loop. 2812 continue; 2813 } 2814 } 2815 } 2816 #ifdef ASSERT 2817 if (!st.at_end()) { // TODO LOOM remove once we show only vthread trace 2818 assert(st.method() == method && st.bci() == bci, "Wrong stack trace"); 2819 st.next(); 2820 } 2821 #endif 2822 2823 // the format of the stacktrace will be: 2824 // - 1 or more fillInStackTrace frames for the exception class (skipped) 2825 // - 0 or more <init> methods for the exception class (skipped) 2826 // - rest of the stack 2827 2828 if (!skip_fillInStackTrace_check) { 2829 if (method->name() == vmSymbols::fillInStackTrace_name() && 2830 throwable->is_a(method->method_holder())) { 2831 continue; 2832 } 2833 else { 2834 skip_fillInStackTrace_check = true; // gone past them all 2835 } 2836 } 2837 if (!skip_throwableInit_check) { 2838 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering"); 2839 2840 // skip <init> methods of the exception class and superclasses 2841 // This is similar to classic VM. 2842 if (method->name() == vmSymbols::object_initializer_name() && 2843 throwable->is_a(method->method_holder())) { 2844 continue; 2845 } else { 2846 // there are none or we've seen them all - either way stop checking 2847 skip_throwableInit_check = true; 2848 } 2849 } 2850 if (method->is_hidden() || method->is_continuation_enter_intrinsic()) { 2851 if (skip_hidden) { 2852 if (total_count == 0) { 2853 // The top frame will be hidden from the stack trace. 2854 bt.set_has_hidden_top_frame(); 2855 } 2856 continue; 2857 } 2858 } 2859 2860 bt.push(method, bci, CHECK); 2861 total_count++; 2862 } 2863 2864 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count); 2865 2866 // Put completed stack trace into throwable object 2867 set_backtrace(throwable(), bt.backtrace()); 2868 set_depth(throwable(), total_count); 2869 } 2870 2871 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) { 2872 // No-op if stack trace is disabled 2873 if (!StackTraceInThrowable) { 2874 return; 2875 } 2876 2877 // Disable stack traces for some preallocated out of memory errors 2878 if (!Universe::should_fill_in_stack_trace(throwable)) { 2879 return; 2880 } 2881 2882 JavaThread* THREAD = JavaThread::current(); // For exception macros. 2883 PreserveExceptionMark pm(THREAD); 2884 2885 fill_in_stack_trace(throwable, method, THREAD); 2886 // Ignore exceptions thrown during stack trace filling (OOM) and reinstall the 2887 // original exception via the PreserveExceptionMark destructor. 2888 CLEAR_PENDING_EXCEPTION; 2889 } 2890 2891 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 2892 // Allocate stack trace - backtrace is created but not filled in 2893 2894 // No-op if stack trace is disabled 2895 if (!StackTraceInThrowable) return; 2896 BacktraceBuilder bt(CHECK); // creates a backtrace 2897 set_backtrace(throwable(), bt.backtrace()); 2898 } 2899 2900 2901 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 2902 // Fill in stack trace into preallocated backtrace (no GC) 2903 2904 // No-op if stack trace is disabled 2905 if (!StackTraceInThrowable) return; 2906 2907 assert(throwable->is_a(vmClasses::Throwable_klass()), "sanity check"); 2908 2909 JavaThread* THREAD = JavaThread::current(); // For exception macros. 2910 2911 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable())); 2912 assert(backtrace.not_null(), "backtrace should have been preallocated"); 2913 2914 ResourceMark rm(THREAD); 2915 vframeStream st(THREAD, false /* stop_at_java_call_stub */, false /* process_frames */); 2916 2917 BacktraceBuilder bt(THREAD, backtrace); 2918 2919 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 2920 // methods as preallocated errors aren't created by "java" code. 2921 2922 // fill in as much stack trace as possible 2923 int chunk_count = 0; 2924 for (;!st.at_end(); st.next()) { 2925 bt.push(st.method(), st.bci(), CHECK); 2926 chunk_count++; 2927 2928 // Bail-out for deep stacks 2929 if (chunk_count >= trace_chunk_size) break; 2930 } 2931 set_depth(throwable(), chunk_count); 2932 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count); 2933 2934 // We support the Throwable immutability protocol defined for Java 7. 2935 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace()); 2936 assert(java_lang_Throwable::unassigned_stacktrace() != nullptr, "not initialized"); 2937 } 2938 2939 void java_lang_Throwable::get_stack_trace_elements(int depth, Handle backtrace, 2940 objArrayHandle stack_trace_array_h, TRAPS) { 2941 2942 if (backtrace.is_null() || stack_trace_array_h.is_null()) { 2943 THROW(vmSymbols::java_lang_NullPointerException()); 2944 } 2945 2946 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent"); 2947 2948 if (stack_trace_array_h->length() != depth) { 2949 THROW(vmSymbols::java_lang_IndexOutOfBoundsException()); 2950 } 2951 2952 objArrayHandle result(THREAD, objArrayOop(backtrace())); 2953 BacktraceIterator iter(result, THREAD); 2954 2955 int index = 0; 2956 while (iter.repeat()) { 2957 BacktraceElement bte = iter.next(THREAD); 2958 2959 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++)); 2960 2961 if (stack_trace_element.is_null()) { 2962 THROW(vmSymbols::java_lang_NullPointerException()); 2963 } 2964 2965 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror())); 2966 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version)); 2967 2968 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, 2969 method, 2970 bte._version, 2971 bte._bci, 2972 bte._name, 2973 CHECK); 2974 } 2975 } 2976 2977 Handle java_lang_Throwable::create_initialization_error(JavaThread* current, Handle throwable) { 2978 // Creates an ExceptionInInitializerError to be recorded as the initialization error when class initialization 2979 // failed due to the passed in 'throwable'. We cannot save 'throwable' directly due to issues with keeping alive 2980 // all objects referenced via its stacktrace. So instead we save a new EIIE instance, with the same message and 2981 // symbolic stacktrace of 'throwable'. 2982 assert(throwable.not_null(), "shouldn't be"); 2983 2984 // Now create the message from the original exception and thread name. 2985 ResourceMark rm(current); 2986 const char *message = nullptr; 2987 oop detailed_message = java_lang_Throwable::message(throwable()); 2988 if (detailed_message != nullptr) { 2989 message = java_lang_String::as_utf8_string(detailed_message); 2990 } 2991 stringStream st; 2992 st.print("Exception %s%s ", throwable()->klass()->name()->as_klass_external_name(), 2993 message == nullptr ? "" : ":"); 2994 if (message == nullptr) { 2995 st.print("[in thread \"%s\"]", current->name()); 2996 } else { 2997 st.print("%s [in thread \"%s\"]", message, current->name()); 2998 } 2999 3000 Symbol* exception_name = vmSymbols::java_lang_ExceptionInInitializerError(); 3001 Handle init_error = Exceptions::new_exception(current, exception_name, st.as_string()); 3002 // If new_exception returns a different exception while creating the exception, 3003 // abandon the attempt to save the initialization error and return null. 3004 if (init_error->klass()->name() != exception_name) { 3005 log_info(class, init)("Exception %s thrown while saving initialization exception", 3006 init_error->klass()->external_name()); 3007 return Handle(); 3008 } 3009 3010 // Call to java to fill in the stack trace and clear declaringClassObject to 3011 // not keep classes alive in the stack trace. 3012 // call this: public StackTraceElement[] getStackTrace() 3013 JavaValue result(T_ARRAY); 3014 JavaCalls::call_virtual(&result, throwable, 3015 vmClasses::Throwable_klass(), 3016 vmSymbols::getStackTrace_name(), 3017 vmSymbols::getStackTrace_signature(), 3018 current); 3019 if (!current->has_pending_exception()){ 3020 Handle stack_trace(current, result.get_oop()); 3021 assert(stack_trace->is_objArray(), "Should be an array"); 3022 java_lang_Throwable::set_stacktrace(init_error(), stack_trace()); 3023 // Clear backtrace because the stacktrace should be used instead. 3024 set_backtrace(init_error(), nullptr); 3025 } else { 3026 log_info(class, init)("Exception thrown while getting stack trace for initialization exception %s", 3027 init_error->klass()->external_name()); 3028 current->clear_pending_exception(); 3029 } 3030 3031 return init_error; 3032 } 3033 3034 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) { 3035 JavaThread* current = JavaThread::current(); 3036 objArrayHandle result(current, objArrayOop(backtrace(throwable))); 3037 BacktraceIterator iter(result, current); 3038 // No backtrace available. 3039 if (!iter.repeat()) return false; 3040 3041 // If the exception happened in a frame that has been hidden, i.e., 3042 // omitted from the back trace, we can not compute the message. 3043 oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset); 3044 if (hidden != nullptr) { 3045 return false; 3046 } 3047 3048 // Get first backtrace element. 3049 BacktraceElement bte = iter.next(current); 3050 3051 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror())); 3052 assert(holder != nullptr, "first element should be non-null"); 3053 Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version); 3054 3055 // Original version is no longer available. 3056 if (m == nullptr || !version_matches(m, bte._version)) { 3057 return false; 3058 } 3059 3060 *method = m; 3061 *bci = bte._bci; 3062 return true; 3063 } 3064 3065 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) { 3066 // Allocate java.lang.StackTraceElement instance 3067 InstanceKlass* k = vmClasses::StackTraceElement_klass(); 3068 assert(k != nullptr, "must be loaded in 1.4+"); 3069 if (k->should_be_initialized()) { 3070 k->initialize(CHECK_NULL); 3071 } 3072 3073 Handle element = k->allocate_instance_handle(CHECK_NULL); 3074 3075 int version = method->constants()->version(); 3076 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_NULL); 3077 return element(); 3078 } 3079 3080 void java_lang_StackTraceElement::fill_in(Handle element, 3081 InstanceKlass* holder, const methodHandle& method, 3082 int version, int bci, Symbol* name, TRAPS) { 3083 assert(element->is_a(vmClasses::StackTraceElement_klass()), "sanity check"); 3084 3085 ResourceMark rm(THREAD); 3086 HandleMark hm(THREAD); 3087 3088 // Fill in class name 3089 Handle java_class(THREAD, holder->java_mirror()); 3090 oop classname = java_lang_Class::name(java_class, CHECK); 3091 java_lang_StackTraceElement::set_declaringClass(element(), classname); 3092 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class()); 3093 3094 oop loader = holder->class_loader(); 3095 if (loader != nullptr) { 3096 oop loader_name = java_lang_ClassLoader::name(loader); 3097 if (loader_name != nullptr) 3098 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name); 3099 } 3100 3101 // Fill in method name 3102 oop methodname = StringTable::intern(name, CHECK); 3103 java_lang_StackTraceElement::set_methodName(element(), methodname); 3104 3105 // Fill in module name and version 3106 ModuleEntry* module = holder->module(); 3107 if (module->is_named()) { 3108 oop module_name = StringTable::intern(module->name(), CHECK); 3109 java_lang_StackTraceElement::set_moduleName(element(), module_name); 3110 oop module_version; 3111 if (module->version() != nullptr) { 3112 module_version = StringTable::intern(module->version(), CHECK); 3113 } else { 3114 module_version = nullptr; 3115 } 3116 java_lang_StackTraceElement::set_moduleVersion(element(), module_version); 3117 } 3118 3119 if (method() == nullptr || !version_matches(method(), version)) { 3120 // The method was redefined, accurate line number information isn't available 3121 java_lang_StackTraceElement::set_fileName(element(), nullptr); 3122 java_lang_StackTraceElement::set_lineNumber(element(), -1); 3123 } else { 3124 Symbol* source; 3125 oop source_file; 3126 int line_number; 3127 decode_file_and_line(java_class, holder, version, method, bci, source, source_file, line_number, CHECK); 3128 3129 java_lang_StackTraceElement::set_fileName(element(), source_file); 3130 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 3131 } 3132 } 3133 3134 void java_lang_StackTraceElement::decode_file_and_line(Handle java_class, 3135 InstanceKlass* holder, 3136 int version, 3137 const methodHandle& method, 3138 int bci, 3139 Symbol*& source, 3140 oop& source_file, 3141 int& line_number, TRAPS) { 3142 // Fill in source file name and line number. 3143 source = Backtrace::get_source_file_name(holder, version); 3144 source_file = java_lang_Class::source_file(java_class()); 3145 if (source != nullptr) { 3146 // Class was not redefined. We can trust its cache if set, 3147 // else we have to initialize it. 3148 if (source_file == nullptr) { 3149 source_file = StringTable::intern(source, CHECK); 3150 java_lang_Class::set_source_file(java_class(), source_file); 3151 } 3152 } else { 3153 // Class was redefined. Dump the cache if it was set. 3154 if (source_file != nullptr) { 3155 source_file = nullptr; 3156 java_lang_Class::set_source_file(java_class(), source_file); 3157 } 3158 } 3159 line_number = Backtrace::get_line_number(method(), bci); 3160 } 3161 3162 #if INCLUDE_JVMCI 3163 void java_lang_StackTraceElement::decode(const methodHandle& method, int bci, 3164 Symbol*& filename, int& line_number, TRAPS) { 3165 ResourceMark rm(THREAD); 3166 HandleMark hm(THREAD); 3167 3168 filename = nullptr; 3169 line_number = -1; 3170 3171 oop source_file; 3172 int version = method->constants()->version(); 3173 InstanceKlass* holder = method->method_holder(); 3174 Handle java_class(THREAD, holder->java_mirror()); 3175 decode_file_and_line(java_class, holder, version, method, bci, filename, source_file, line_number, CHECK); 3176 } 3177 #endif // INCLUDE_JVMCI 3178 3179 // java_lang_ClassFrameInfo 3180 3181 int java_lang_ClassFrameInfo::_classOrMemberName_offset; 3182 int java_lang_ClassFrameInfo::_flags_offset; 3183 3184 #define CLASSFRAMEINFO_FIELDS_DO(macro) \ 3185 macro(_classOrMemberName_offset, k, "classOrMemberName", object_signature, false); \ 3186 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false) 3187 3188 void java_lang_ClassFrameInfo::compute_offsets() { 3189 InstanceKlass* k = vmClasses::ClassFrameInfo_klass(); 3190 CLASSFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3191 } 3192 3193 #if INCLUDE_CDS 3194 void java_lang_ClassFrameInfo::serialize_offsets(SerializeClosure* f) { 3195 CLASSFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3196 } 3197 #endif 3198 3199 static int get_flags(const methodHandle& m) { 3200 int flags = m->access_flags().as_method_flags(); 3201 if (m->is_object_initializer()) { 3202 flags |= java_lang_invoke_MemberName::MN_IS_CONSTRUCTOR; 3203 } else { 3204 // Note: Static initializers can be here. Record them as plain methods. 3205 flags |= java_lang_invoke_MemberName::MN_IS_METHOD; 3206 } 3207 if (m->caller_sensitive()) { 3208 flags |= java_lang_invoke_MemberName::MN_CALLER_SENSITIVE; 3209 } 3210 if (m->is_hidden()) { 3211 flags |= java_lang_invoke_MemberName::MN_HIDDEN_MEMBER; 3212 } 3213 assert((flags & 0xFF000000) == 0, "unexpected flags"); 3214 return flags; 3215 } 3216 3217 oop java_lang_ClassFrameInfo::classOrMemberName(oop obj) { 3218 return obj->obj_field(_classOrMemberName_offset); 3219 } 3220 3221 int java_lang_ClassFrameInfo::flags(oop obj) { 3222 return obj->int_field(_flags_offset); 3223 } 3224 3225 void java_lang_ClassFrameInfo::init_class(Handle stackFrame, const methodHandle& m) { 3226 stackFrame->obj_field_put(_classOrMemberName_offset, m->method_holder()->java_mirror()); 3227 // flags is initialized when ClassFrameInfo object is constructed and retain the value 3228 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m); 3229 stackFrame->int_field_put(_flags_offset, flags); 3230 } 3231 3232 void java_lang_ClassFrameInfo::init_method(Handle stackFrame, const methodHandle& m, TRAPS) { 3233 oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(m, CHECK); 3234 stackFrame->obj_field_put(_classOrMemberName_offset, rmethod_name); 3235 // flags is initialized when ClassFrameInfo object is constructed and retain the value 3236 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m); 3237 stackFrame->int_field_put(_flags_offset, flags); 3238 } 3239 3240 3241 // java_lang_StackFrameInfo 3242 3243 int java_lang_StackFrameInfo::_type_offset; 3244 int java_lang_StackFrameInfo::_name_offset; 3245 int java_lang_StackFrameInfo::_bci_offset; 3246 int java_lang_StackFrameInfo::_version_offset; 3247 int java_lang_StackFrameInfo::_contScope_offset; 3248 3249 #define STACKFRAMEINFO_FIELDS_DO(macro) \ 3250 macro(_type_offset, k, "type", object_signature, false); \ 3251 macro(_name_offset, k, "name", string_signature, false); \ 3252 macro(_bci_offset, k, "bci", int_signature, false); \ 3253 macro(_contScope_offset, k, "contScope", continuationscope_signature, false) 3254 3255 void java_lang_StackFrameInfo::compute_offsets() { 3256 InstanceKlass* k = vmClasses::StackFrameInfo_klass(); 3257 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3258 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3259 } 3260 3261 #if INCLUDE_CDS 3262 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) { 3263 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3264 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3265 } 3266 #endif 3267 3268 Method* java_lang_StackFrameInfo::get_method(oop obj) { 3269 oop m = java_lang_ClassFrameInfo::classOrMemberName(obj); 3270 Method* method = java_lang_invoke_ResolvedMethodName::vmtarget(m); 3271 return method; 3272 } 3273 3274 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS) { 3275 // set Method* or mid/cpref 3276 HandleMark hm(THREAD); 3277 Handle cont_h(THREAD, cont); 3278 java_lang_ClassFrameInfo::init_method(stackFrame, method, CHECK); 3279 3280 // set bci 3281 java_lang_StackFrameInfo::set_bci(stackFrame(), bci); 3282 // method may be redefined; store the version 3283 int version = method->constants()->version(); 3284 assert((jushort)version == version, "version should be short"); 3285 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version); 3286 3287 oop contScope = cont_h() != nullptr ? jdk_internal_vm_Continuation::scope(cont_h()) : (oop)nullptr; 3288 java_lang_StackFrameInfo::set_contScope(stackFrame(), contScope); 3289 } 3290 3291 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) { 3292 ResourceMark rm(THREAD); 3293 HandleMark hm(THREAD); 3294 3295 Method* method = java_lang_StackFrameInfo::get_method(stackFrame()); 3296 InstanceKlass* holder = method->method_holder(); 3297 short version = stackFrame->short_field(_version_offset); 3298 int bci = stackFrame->int_field(_bci_offset); 3299 Symbol* name = method->name(); 3300 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, methodHandle(THREAD, method), version, bci, name, CHECK); 3301 } 3302 3303 oop java_lang_StackFrameInfo::type(oop obj) { 3304 return obj->obj_field(_type_offset); 3305 } 3306 3307 void java_lang_StackFrameInfo::set_type(oop obj, oop value) { 3308 obj->obj_field_put(_type_offset, value); 3309 } 3310 3311 oop java_lang_StackFrameInfo::name(oop obj) { 3312 return obj->obj_field(_name_offset); 3313 } 3314 3315 void java_lang_StackFrameInfo::set_name(oop obj, oop value) { 3316 obj->obj_field_put(_name_offset, value); 3317 } 3318 3319 void java_lang_StackFrameInfo::set_version(oop obj, short value) { 3320 obj->short_field_put(_version_offset, value); 3321 } 3322 3323 void java_lang_StackFrameInfo::set_bci(oop obj, int value) { 3324 assert(value >= 0 && value < max_jushort, "must be a valid bci value"); 3325 obj->int_field_put(_bci_offset, value); 3326 } 3327 3328 void java_lang_StackFrameInfo::set_contScope(oop obj, oop value) { 3329 obj->obj_field_put(_contScope_offset, value); 3330 } 3331 3332 int java_lang_LiveStackFrameInfo::_monitors_offset; 3333 int java_lang_LiveStackFrameInfo::_locals_offset; 3334 int java_lang_LiveStackFrameInfo::_operands_offset; 3335 int java_lang_LiveStackFrameInfo::_mode_offset; 3336 3337 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \ 3338 macro(_monitors_offset, k, "monitors", object_array_signature, false); \ 3339 macro(_locals_offset, k, "locals", object_array_signature, false); \ 3340 macro(_operands_offset, k, "operands", object_array_signature, false); \ 3341 macro(_mode_offset, k, "mode", int_signature, false) 3342 3343 void java_lang_LiveStackFrameInfo::compute_offsets() { 3344 InstanceKlass* k = vmClasses::LiveStackFrameInfo_klass(); 3345 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3346 } 3347 3348 #if INCLUDE_CDS 3349 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) { 3350 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3351 } 3352 #endif 3353 3354 void java_lang_LiveStackFrameInfo::set_monitors(oop obj, oop value) { 3355 obj->obj_field_put(_monitors_offset, value); 3356 } 3357 3358 void java_lang_LiveStackFrameInfo::set_locals(oop obj, oop value) { 3359 obj->obj_field_put(_locals_offset, value); 3360 } 3361 3362 void java_lang_LiveStackFrameInfo::set_operands(oop obj, oop value) { 3363 obj->obj_field_put(_operands_offset, value); 3364 } 3365 3366 void java_lang_LiveStackFrameInfo::set_mode(oop obj, int value) { 3367 obj->int_field_put(_mode_offset, value); 3368 } 3369 3370 3371 // java_lang_AccessibleObject 3372 3373 int java_lang_reflect_AccessibleObject::_override_offset; 3374 3375 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \ 3376 macro(_override_offset, k, "override", bool_signature, false) 3377 3378 void java_lang_reflect_AccessibleObject::compute_offsets() { 3379 InstanceKlass* k = vmClasses::reflect_AccessibleObject_klass(); 3380 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3381 } 3382 3383 #if INCLUDE_CDS 3384 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) { 3385 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3386 } 3387 #endif 3388 3389 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 3390 return (jboolean) reflect->bool_field(_override_offset); 3391 } 3392 3393 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 3394 reflect->bool_field_put(_override_offset, (int) value); 3395 } 3396 3397 // java_lang_reflect_Method 3398 3399 int java_lang_reflect_Method::_clazz_offset; 3400 int java_lang_reflect_Method::_name_offset; 3401 int java_lang_reflect_Method::_returnType_offset; 3402 int java_lang_reflect_Method::_parameterTypes_offset; 3403 int java_lang_reflect_Method::_exceptionTypes_offset; 3404 int java_lang_reflect_Method::_slot_offset; 3405 int java_lang_reflect_Method::_modifiers_offset; 3406 int java_lang_reflect_Method::_signature_offset; 3407 int java_lang_reflect_Method::_annotations_offset; 3408 int java_lang_reflect_Method::_parameter_annotations_offset; 3409 int java_lang_reflect_Method::_annotation_default_offset; 3410 3411 #define METHOD_FIELDS_DO(macro) \ 3412 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3413 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3414 macro(_returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \ 3415 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 3416 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 3417 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 3418 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3419 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 3420 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \ 3421 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \ 3422 macro(_annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false); 3423 3424 void java_lang_reflect_Method::compute_offsets() { 3425 InstanceKlass* k = vmClasses::reflect_Method_klass(); 3426 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3427 } 3428 3429 #if INCLUDE_CDS 3430 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) { 3431 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3432 } 3433 #endif 3434 3435 Handle java_lang_reflect_Method::create(TRAPS) { 3436 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3437 Klass* klass = vmClasses::reflect_Method_klass(); 3438 // This class is eagerly initialized during VM initialization, since we keep a reference 3439 // to one of the methods 3440 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized"); 3441 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD); 3442 } 3443 3444 oop java_lang_reflect_Method::clazz(oop reflect) { 3445 return reflect->obj_field(_clazz_offset); 3446 } 3447 3448 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 3449 reflect->obj_field_put(_clazz_offset, value); 3450 } 3451 3452 int java_lang_reflect_Method::slot(oop reflect) { 3453 return reflect->int_field(_slot_offset); 3454 } 3455 3456 void java_lang_reflect_Method::set_slot(oop reflect, int value) { 3457 reflect->int_field_put(_slot_offset, value); 3458 } 3459 3460 void java_lang_reflect_Method::set_name(oop method, oop value) { 3461 method->obj_field_put(_name_offset, value); 3462 } 3463 3464 oop java_lang_reflect_Method::return_type(oop method) { 3465 return method->obj_field(_returnType_offset); 3466 } 3467 3468 void java_lang_reflect_Method::set_return_type(oop method, oop value) { 3469 method->obj_field_put(_returnType_offset, value); 3470 } 3471 3472 oop java_lang_reflect_Method::parameter_types(oop method) { 3473 return method->obj_field(_parameterTypes_offset); 3474 } 3475 3476 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 3477 method->obj_field_put(_parameterTypes_offset, value); 3478 } 3479 3480 void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 3481 method->obj_field_put(_exceptionTypes_offset, value); 3482 } 3483 3484 void java_lang_reflect_Method::set_modifiers(oop method, int value) { 3485 method->int_field_put(_modifiers_offset, value); 3486 } 3487 3488 void java_lang_reflect_Method::set_signature(oop method, oop value) { 3489 method->obj_field_put(_signature_offset, value); 3490 } 3491 3492 void java_lang_reflect_Method::set_annotations(oop method, oop value) { 3493 method->obj_field_put(_annotations_offset, value); 3494 } 3495 3496 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 3497 method->obj_field_put(_parameter_annotations_offset, value); 3498 } 3499 3500 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 3501 method->obj_field_put(_annotation_default_offset, value); 3502 } 3503 3504 int java_lang_reflect_Constructor::_clazz_offset; 3505 int java_lang_reflect_Constructor::_parameterTypes_offset; 3506 int java_lang_reflect_Constructor::_exceptionTypes_offset; 3507 int java_lang_reflect_Constructor::_slot_offset; 3508 int java_lang_reflect_Constructor::_modifiers_offset; 3509 int java_lang_reflect_Constructor::_signature_offset; 3510 int java_lang_reflect_Constructor::_annotations_offset; 3511 int java_lang_reflect_Constructor::_parameter_annotations_offset; 3512 3513 #define CONSTRUCTOR_FIELDS_DO(macro) \ 3514 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3515 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 3516 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 3517 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 3518 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3519 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 3520 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \ 3521 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); 3522 3523 void java_lang_reflect_Constructor::compute_offsets() { 3524 InstanceKlass* k = vmClasses::reflect_Constructor_klass(); 3525 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3526 } 3527 3528 #if INCLUDE_CDS 3529 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) { 3530 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3531 } 3532 #endif 3533 3534 Handle java_lang_reflect_Constructor::create(TRAPS) { 3535 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3536 Symbol* name = vmSymbols::java_lang_reflect_Constructor(); 3537 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3538 InstanceKlass* ik = InstanceKlass::cast(k); 3539 // Ensure it is initialized 3540 ik->initialize(CHECK_NH); 3541 return ik->allocate_instance_handle(THREAD); 3542 } 3543 3544 oop java_lang_reflect_Constructor::clazz(oop reflect) { 3545 return reflect->obj_field(_clazz_offset); 3546 } 3547 3548 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 3549 reflect->obj_field_put(_clazz_offset, value); 3550 } 3551 3552 oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 3553 return constructor->obj_field(_parameterTypes_offset); 3554 } 3555 3556 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 3557 constructor->obj_field_put(_parameterTypes_offset, value); 3558 } 3559 3560 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 3561 constructor->obj_field_put(_exceptionTypes_offset, value); 3562 } 3563 3564 int java_lang_reflect_Constructor::slot(oop reflect) { 3565 return reflect->int_field(_slot_offset); 3566 } 3567 3568 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 3569 reflect->int_field_put(_slot_offset, value); 3570 } 3571 3572 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 3573 constructor->int_field_put(_modifiers_offset, value); 3574 } 3575 3576 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 3577 constructor->obj_field_put(_signature_offset, value); 3578 } 3579 3580 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 3581 constructor->obj_field_put(_annotations_offset, value); 3582 } 3583 3584 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 3585 method->obj_field_put(_parameter_annotations_offset, value); 3586 } 3587 3588 int java_lang_reflect_Field::_clazz_offset; 3589 int java_lang_reflect_Field::_name_offset; 3590 int java_lang_reflect_Field::_type_offset; 3591 int java_lang_reflect_Field::_slot_offset; 3592 int java_lang_reflect_Field::_modifiers_offset; 3593 int java_lang_reflect_Field::_trusted_final_offset; 3594 int java_lang_reflect_Field::_signature_offset; 3595 int java_lang_reflect_Field::_annotations_offset; 3596 3597 #define FIELD_FIELDS_DO(macro) \ 3598 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3599 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3600 macro(_type_offset, k, vmSymbols::type_name(), class_signature, false); \ 3601 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 3602 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3603 macro(_trusted_final_offset, k, vmSymbols::trusted_final_name(), bool_signature, false); \ 3604 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 3605 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); 3606 3607 void java_lang_reflect_Field::compute_offsets() { 3608 InstanceKlass* k = vmClasses::reflect_Field_klass(); 3609 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3610 } 3611 3612 #if INCLUDE_CDS 3613 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) { 3614 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3615 } 3616 #endif 3617 3618 Handle java_lang_reflect_Field::create(TRAPS) { 3619 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3620 Symbol* name = vmSymbols::java_lang_reflect_Field(); 3621 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3622 InstanceKlass* ik = InstanceKlass::cast(k); 3623 // Ensure it is initialized 3624 ik->initialize(CHECK_NH); 3625 return ik->allocate_instance_handle(THREAD); 3626 } 3627 3628 oop java_lang_reflect_Field::clazz(oop reflect) { 3629 return reflect->obj_field(_clazz_offset); 3630 } 3631 3632 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 3633 reflect->obj_field_put(_clazz_offset, value); 3634 } 3635 3636 oop java_lang_reflect_Field::name(oop field) { 3637 return field->obj_field(_name_offset); 3638 } 3639 3640 void java_lang_reflect_Field::set_name(oop field, oop value) { 3641 field->obj_field_put(_name_offset, value); 3642 } 3643 3644 oop java_lang_reflect_Field::type(oop field) { 3645 return field->obj_field(_type_offset); 3646 } 3647 3648 void java_lang_reflect_Field::set_type(oop field, oop value) { 3649 field->obj_field_put(_type_offset, value); 3650 } 3651 3652 int java_lang_reflect_Field::slot(oop reflect) { 3653 return reflect->int_field(_slot_offset); 3654 } 3655 3656 void java_lang_reflect_Field::set_slot(oop reflect, int value) { 3657 reflect->int_field_put(_slot_offset, value); 3658 } 3659 3660 int java_lang_reflect_Field::modifiers(oop field) { 3661 return field->int_field(_modifiers_offset); 3662 } 3663 3664 void java_lang_reflect_Field::set_modifiers(oop field, int value) { 3665 field->int_field_put(_modifiers_offset, value); 3666 } 3667 3668 void java_lang_reflect_Field::set_trusted_final(oop field) { 3669 field->bool_field_put(_trusted_final_offset, true); 3670 } 3671 3672 void java_lang_reflect_Field::set_signature(oop field, oop value) { 3673 field->obj_field_put(_signature_offset, value); 3674 } 3675 3676 void java_lang_reflect_Field::set_annotations(oop field, oop value) { 3677 field->obj_field_put(_annotations_offset, value); 3678 } 3679 3680 oop java_lang_reflect_RecordComponent::create(InstanceKlass* holder, RecordComponent* component, TRAPS) { 3681 // Allocate java.lang.reflect.RecordComponent instance 3682 HandleMark hm(THREAD); 3683 InstanceKlass* ik = vmClasses::RecordComponent_klass(); 3684 assert(ik != nullptr, "must be loaded"); 3685 ik->initialize(CHECK_NULL); 3686 3687 Handle element = ik->allocate_instance_handle(CHECK_NULL); 3688 3689 Handle decl_class(THREAD, holder->java_mirror()); 3690 java_lang_reflect_RecordComponent::set_clazz(element(), decl_class()); 3691 3692 Symbol* name = holder->constants()->symbol_at(component->name_index()); // name_index is a utf8 3693 oop component_name = StringTable::intern(name, CHECK_NULL); 3694 java_lang_reflect_RecordComponent::set_name(element(), component_name); 3695 3696 Symbol* type = holder->constants()->symbol_at(component->descriptor_index()); 3697 Handle component_type_h = 3698 SystemDictionary::find_java_mirror_for_type(type, holder, SignatureStream::NCDFError, CHECK_NULL); 3699 java_lang_reflect_RecordComponent::set_type(element(), component_type_h()); 3700 3701 Method* accessor_method = nullptr; 3702 { 3703 // Prepend "()" to type to create the full method signature. 3704 ResourceMark rm(THREAD); 3705 int sig_len = type->utf8_length() + 3; // "()" and null char 3706 char* sig = NEW_RESOURCE_ARRAY(char, sig_len); 3707 jio_snprintf(sig, sig_len, "%c%c%s", JVM_SIGNATURE_FUNC, JVM_SIGNATURE_ENDFUNC, type->as_C_string()); 3708 TempNewSymbol full_sig = SymbolTable::new_symbol(sig); 3709 accessor_method = holder->find_instance_method(name, full_sig, Klass::PrivateLookupMode::find); 3710 } 3711 3712 if (accessor_method != nullptr) { 3713 methodHandle method(THREAD, accessor_method); 3714 oop m = Reflection::new_method(method, false, CHECK_NULL); 3715 java_lang_reflect_RecordComponent::set_accessor(element(), m); 3716 } else { 3717 java_lang_reflect_RecordComponent::set_accessor(element(), nullptr); 3718 } 3719 3720 int sig_index = component->generic_signature_index(); 3721 if (sig_index > 0) { 3722 Symbol* sig = holder->constants()->symbol_at(sig_index); // sig_index is a utf8 3723 oop component_sig = StringTable::intern(sig, CHECK_NULL); 3724 java_lang_reflect_RecordComponent::set_signature(element(), component_sig); 3725 } else { 3726 java_lang_reflect_RecordComponent::set_signature(element(), nullptr); 3727 } 3728 3729 typeArrayOop annotation_oop = Annotations::make_java_array(component->annotations(), CHECK_NULL); 3730 java_lang_reflect_RecordComponent::set_annotations(element(), annotation_oop); 3731 3732 typeArrayOop type_annotation_oop = Annotations::make_java_array(component->type_annotations(), CHECK_NULL); 3733 java_lang_reflect_RecordComponent::set_typeAnnotations(element(), type_annotation_oop); 3734 3735 return element(); 3736 } 3737 3738 int reflect_ConstantPool::_oop_offset; 3739 3740 #define CONSTANTPOOL_FIELDS_DO(macro) \ 3741 macro(_oop_offset, k, "constantPoolOop", object_signature, false) 3742 3743 void reflect_ConstantPool::compute_offsets() { 3744 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass(); 3745 // The field is called ConstantPool* in the sun.reflect.ConstantPool class. 3746 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3747 } 3748 3749 #if INCLUDE_CDS 3750 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) { 3751 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3752 } 3753 #endif 3754 3755 int java_lang_reflect_Parameter::_name_offset; 3756 int java_lang_reflect_Parameter::_modifiers_offset; 3757 int java_lang_reflect_Parameter::_index_offset; 3758 int java_lang_reflect_Parameter::_executable_offset; 3759 3760 #define PARAMETER_FIELDS_DO(macro) \ 3761 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3762 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3763 macro(_index_offset, k, vmSymbols::index_name(), int_signature, false); \ 3764 macro(_executable_offset, k, vmSymbols::executable_name(), executable_signature, false) 3765 3766 void java_lang_reflect_Parameter::compute_offsets() { 3767 InstanceKlass* k = vmClasses::reflect_Parameter_klass(); 3768 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3769 } 3770 3771 #if INCLUDE_CDS 3772 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) { 3773 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3774 } 3775 #endif 3776 3777 Handle java_lang_reflect_Parameter::create(TRAPS) { 3778 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3779 Symbol* name = vmSymbols::java_lang_reflect_Parameter(); 3780 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3781 InstanceKlass* ik = InstanceKlass::cast(k); 3782 // Ensure it is initialized 3783 ik->initialize(CHECK_NH); 3784 return ik->allocate_instance_handle(THREAD); 3785 } 3786 3787 oop java_lang_reflect_Parameter::name(oop param) { 3788 return param->obj_field(_name_offset); 3789 } 3790 3791 void java_lang_reflect_Parameter::set_name(oop param, oop value) { 3792 param->obj_field_put(_name_offset, value); 3793 } 3794 3795 int java_lang_reflect_Parameter::modifiers(oop param) { 3796 return param->int_field(_modifiers_offset); 3797 } 3798 3799 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) { 3800 param->int_field_put(_modifiers_offset, value); 3801 } 3802 3803 int java_lang_reflect_Parameter::index(oop param) { 3804 return param->int_field(_index_offset); 3805 } 3806 3807 void java_lang_reflect_Parameter::set_index(oop param, int value) { 3808 param->int_field_put(_index_offset, value); 3809 } 3810 3811 oop java_lang_reflect_Parameter::executable(oop param) { 3812 return param->obj_field(_executable_offset); 3813 } 3814 3815 void java_lang_reflect_Parameter::set_executable(oop param, oop value) { 3816 param->obj_field_put(_executable_offset, value); 3817 } 3818 3819 // java_lang_Module 3820 3821 int java_lang_Module::_loader_offset; 3822 int java_lang_Module::_name_offset; 3823 int java_lang_Module::_module_entry_offset; 3824 3825 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) { 3826 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3827 return JavaCalls::construct_new_instance(vmClasses::Module_klass(), 3828 vmSymbols::java_lang_module_init_signature(), 3829 loader, module_name, CHECK_NH); 3830 } 3831 3832 #define MODULE_FIELDS_DO(macro) \ 3833 macro(_loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \ 3834 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false) 3835 3836 void java_lang_Module::compute_offsets() { 3837 InstanceKlass* k = vmClasses::Module_klass(); 3838 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3839 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3840 } 3841 3842 #if INCLUDE_CDS 3843 void java_lang_Module::serialize_offsets(SerializeClosure* f) { 3844 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3845 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3846 } 3847 #endif 3848 3849 oop java_lang_Module::loader(oop module) { 3850 return module->obj_field(_loader_offset); 3851 } 3852 3853 void java_lang_Module::set_loader(oop module, oop value) { 3854 module->obj_field_put(_loader_offset, value); 3855 } 3856 3857 oop java_lang_Module::name(oop module) { 3858 return module->obj_field(_name_offset); 3859 } 3860 3861 void java_lang_Module::set_name(oop module, oop value) { 3862 module->obj_field_put(_name_offset, value); 3863 } 3864 3865 ModuleEntry* java_lang_Module::module_entry_raw(oop module) { 3866 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset"); 3867 assert(module != nullptr, "module can't be null"); 3868 assert(oopDesc::is_oop(module), "module must be oop"); 3869 3870 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset); 3871 return module_entry; 3872 } 3873 3874 ModuleEntry* java_lang_Module::module_entry(oop module) { 3875 ModuleEntry* module_entry = module_entry_raw(module); 3876 if (module_entry == nullptr) { 3877 // If the inject field containing the ModuleEntry* is null then return the 3878 // class loader's unnamed module. 3879 oop loader = java_lang_Module::loader(module); 3880 Handle h_loader = Handle(Thread::current(), loader); 3881 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader); 3882 return loader_cld->unnamed_module(); 3883 } 3884 return module_entry; 3885 } 3886 3887 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) { 3888 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset"); 3889 assert(module != nullptr, "module can't be null"); 3890 assert(oopDesc::is_oop(module), "module must be oop"); 3891 module->address_field_put(_module_entry_offset, (address)module_entry); 3892 } 3893 3894 Handle reflect_ConstantPool::create(TRAPS) { 3895 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3896 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass(); 3897 // Ensure it is initialized 3898 k->initialize(CHECK_NH); 3899 return k->allocate_instance_handle(THREAD); 3900 } 3901 3902 3903 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) { 3904 oop mirror = value->pool_holder()->java_mirror(); 3905 // Save the mirror to get back the constant pool. 3906 reflect->obj_field_put(_oop_offset, mirror); 3907 } 3908 3909 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) { 3910 3911 oop mirror = reflect->obj_field(_oop_offset); 3912 Klass* k = java_lang_Class::as_Klass(mirror); 3913 assert(k->is_instance_klass(), "Must be"); 3914 3915 // Get the constant pool back from the klass. Since class redefinition 3916 // merges the new constant pool into the old, this is essentially the 3917 // same constant pool as the original. If constant pool merging is 3918 // no longer done in the future, this will have to change to save 3919 // the original. 3920 return InstanceKlass::cast(k)->constants(); 3921 } 3922 3923 3924 // Support for java_lang_ref_Reference 3925 3926 bool java_lang_ref_Reference::_offsets_initialized; 3927 3928 int java_lang_ref_Reference::_referent_offset; 3929 int java_lang_ref_Reference::_queue_offset; 3930 int java_lang_ref_Reference::_next_offset; 3931 int java_lang_ref_Reference::_discovered_offset; 3932 3933 #define REFERENCE_FIELDS_DO(macro) \ 3934 macro(_referent_offset, k, "referent", object_signature, false); \ 3935 macro(_queue_offset, k, "queue", referencequeue_signature, false); \ 3936 macro(_next_offset, k, "next", reference_signature, false); \ 3937 macro(_discovered_offset, k, "discovered", reference_signature, false); 3938 3939 void java_lang_ref_Reference::compute_offsets() { 3940 if (_offsets_initialized) { 3941 return; 3942 } 3943 _offsets_initialized = true; 3944 InstanceKlass* k = vmClasses::Reference_klass(); 3945 REFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3946 } 3947 3948 #if INCLUDE_CDS 3949 void java_lang_ref_Reference::serialize_offsets(SerializeClosure* f) { 3950 f->do_bool(&_offsets_initialized); 3951 REFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3952 } 3953 #endif 3954 3955 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) { 3956 assert(obj != nullptr, "sanity"); 3957 if (offset != _referent_offset) { 3958 return false; 3959 } 3960 3961 Klass* k = obj->klass(); 3962 if (!k->is_instance_klass()) { 3963 return false; 3964 } 3965 3966 InstanceKlass* ik = InstanceKlass::cast(obj->klass()); 3967 bool is_reference = ik->reference_type() != REF_NONE; 3968 assert(!is_reference || ik->is_subclass_of(vmClasses::Reference_klass()), "sanity"); 3969 return is_reference; 3970 } 3971 3972 int java_lang_boxing_object::_value_offset; 3973 int java_lang_boxing_object::_long_value_offset; 3974 3975 #define BOXING_FIELDS_DO(macro) \ 3976 macro(_value_offset, integerKlass, "value", int_signature, false); \ 3977 macro(_long_value_offset, longKlass, "value", long_signature, false); 3978 3979 void java_lang_boxing_object::compute_offsets() { 3980 InstanceKlass* integerKlass = vmClasses::Integer_klass(); 3981 InstanceKlass* longKlass = vmClasses::Long_klass(); 3982 BOXING_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3983 } 3984 3985 #if INCLUDE_CDS 3986 void java_lang_boxing_object::serialize_offsets(SerializeClosure* f) { 3987 BOXING_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3988 } 3989 #endif 3990 3991 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 3992 Klass* k = vmClasses::box_klass(type); 3993 if (k == nullptr) return nullptr; 3994 InstanceKlass* ik = InstanceKlass::cast(k); 3995 if (!ik->is_initialized()) { 3996 ik->initialize(CHECK_NULL); 3997 } 3998 return ik->allocate_instance(THREAD); 3999 } 4000 4001 4002 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 4003 oop box = initialize_and_allocate(type, CHECK_NULL); 4004 if (box == nullptr) return nullptr; 4005 switch (type) { 4006 case T_BOOLEAN: 4007 box->bool_field_put(_value_offset, value->z); 4008 break; 4009 case T_CHAR: 4010 box->char_field_put(_value_offset, value->c); 4011 break; 4012 case T_FLOAT: 4013 box->float_field_put(_value_offset, value->f); 4014 break; 4015 case T_DOUBLE: 4016 box->double_field_put(_long_value_offset, value->d); 4017 break; 4018 case T_BYTE: 4019 box->byte_field_put(_value_offset, value->b); 4020 break; 4021 case T_SHORT: 4022 box->short_field_put(_value_offset, value->s); 4023 break; 4024 case T_INT: 4025 box->int_field_put(_value_offset, value->i); 4026 break; 4027 case T_LONG: 4028 box->long_field_put(_long_value_offset, value->j); 4029 break; 4030 default: 4031 return nullptr; 4032 } 4033 return box; 4034 } 4035 4036 4037 BasicType java_lang_boxing_object::basic_type(oop box) { 4038 if (box == nullptr) return T_ILLEGAL; 4039 BasicType type = vmClasses::box_klass_type(box->klass()); 4040 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 4041 return T_ILLEGAL; 4042 return type; 4043 } 4044 4045 4046 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 4047 BasicType type = vmClasses::box_klass_type(box->klass()); 4048 switch (type) { 4049 case T_BOOLEAN: 4050 value->z = box->bool_field(_value_offset); 4051 break; 4052 case T_CHAR: 4053 value->c = box->char_field(_value_offset); 4054 break; 4055 case T_FLOAT: 4056 value->f = box->float_field(_value_offset); 4057 break; 4058 case T_DOUBLE: 4059 value->d = box->double_field(_long_value_offset); 4060 break; 4061 case T_BYTE: 4062 value->b = box->byte_field(_value_offset); 4063 break; 4064 case T_SHORT: 4065 value->s = box->short_field(_value_offset); 4066 break; 4067 case T_INT: 4068 value->i = box->int_field(_value_offset); 4069 break; 4070 case T_LONG: 4071 value->j = box->long_field(_long_value_offset); 4072 break; 4073 default: 4074 return T_ILLEGAL; 4075 } // end switch 4076 return type; 4077 } 4078 4079 4080 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 4081 BasicType type = vmClasses::box_klass_type(box->klass()); 4082 switch (type) { 4083 case T_BOOLEAN: 4084 box->bool_field_put(_value_offset, value->z); 4085 break; 4086 case T_CHAR: 4087 box->char_field_put(_value_offset, value->c); 4088 break; 4089 case T_FLOAT: 4090 box->float_field_put(_value_offset, value->f); 4091 break; 4092 case T_DOUBLE: 4093 box->double_field_put(_long_value_offset, value->d); 4094 break; 4095 case T_BYTE: 4096 box->byte_field_put(_value_offset, value->b); 4097 break; 4098 case T_SHORT: 4099 box->short_field_put(_value_offset, value->s); 4100 break; 4101 case T_INT: 4102 box->int_field_put(_value_offset, value->i); 4103 break; 4104 case T_LONG: 4105 box->long_field_put(_long_value_offset, value->j); 4106 break; 4107 default: 4108 return T_ILLEGAL; 4109 } // end switch 4110 return type; 4111 } 4112 4113 4114 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) { 4115 switch (type) { 4116 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break; 4117 case T_CHAR: st->print("%d", value->c); break; 4118 case T_BYTE: st->print("%d", value->b); break; 4119 case T_SHORT: st->print("%d", value->s); break; 4120 case T_INT: st->print("%d", value->i); break; 4121 case T_LONG: st->print(JLONG_FORMAT, value->j); break; 4122 case T_FLOAT: st->print("%f", value->f); break; 4123 case T_DOUBLE: st->print("%lf", value->d); break; 4124 default: st->print("type %d?", type); break; 4125 } 4126 } 4127 4128 4129 // Support for java_lang_ref_SoftReference 4130 // 4131 4132 int java_lang_ref_SoftReference::_timestamp_offset; 4133 int java_lang_ref_SoftReference::_static_clock_offset; 4134 4135 #define SOFTREFERENCE_FIELDS_DO(macro) \ 4136 macro(_timestamp_offset, k, "timestamp", long_signature, false); \ 4137 macro(_static_clock_offset, k, "clock", long_signature, true) 4138 4139 void java_lang_ref_SoftReference::compute_offsets() { 4140 InstanceKlass* k = vmClasses::SoftReference_klass(); 4141 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4142 } 4143 4144 #if INCLUDE_CDS 4145 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) { 4146 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4147 } 4148 #endif 4149 4150 jlong java_lang_ref_SoftReference::timestamp(oop ref) { 4151 return ref->long_field(_timestamp_offset); 4152 } 4153 4154 jlong java_lang_ref_SoftReference::clock() { 4155 InstanceKlass* ik = vmClasses::SoftReference_klass(); 4156 oop base = ik->static_field_base_raw(); 4157 return base->long_field(_static_clock_offset); 4158 } 4159 4160 void java_lang_ref_SoftReference::set_clock(jlong value) { 4161 InstanceKlass* ik = vmClasses::SoftReference_klass(); 4162 oop base = ik->static_field_base_raw(); 4163 base->long_field_put(_static_clock_offset, value); 4164 } 4165 4166 // Support for java_lang_invoke_DirectMethodHandle 4167 4168 int java_lang_invoke_DirectMethodHandle::_member_offset; 4169 4170 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) { 4171 oop member_name = nullptr; 4172 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh), 4173 "a DirectMethodHandle oop is expected"); 4174 return dmh->obj_field(_member_offset); 4175 } 4176 4177 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \ 4178 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false) 4179 4180 void java_lang_invoke_DirectMethodHandle::compute_offsets() { 4181 InstanceKlass* k = vmClasses::DirectMethodHandle_klass(); 4182 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4183 } 4184 4185 #if INCLUDE_CDS 4186 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) { 4187 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4188 } 4189 #endif 4190 4191 // Support for java_lang_invoke_MethodHandle 4192 4193 int java_lang_invoke_MethodHandle::_type_offset; 4194 int java_lang_invoke_MethodHandle::_form_offset; 4195 4196 int java_lang_invoke_MemberName::_clazz_offset; 4197 int java_lang_invoke_MemberName::_name_offset; 4198 int java_lang_invoke_MemberName::_type_offset; 4199 int java_lang_invoke_MemberName::_flags_offset; 4200 int java_lang_invoke_MemberName::_method_offset; 4201 int java_lang_invoke_MemberName::_vmindex_offset; 4202 4203 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset; 4204 int java_lang_invoke_ResolvedMethodName::_vmholder_offset; 4205 4206 int java_lang_invoke_LambdaForm::_vmentry_offset; 4207 4208 #define METHODHANDLE_FIELDS_DO(macro) \ 4209 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \ 4210 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false) 4211 4212 void java_lang_invoke_MethodHandle::compute_offsets() { 4213 InstanceKlass* k = vmClasses::MethodHandle_klass(); 4214 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4215 } 4216 4217 #if INCLUDE_CDS 4218 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) { 4219 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4220 } 4221 #endif 4222 4223 #define MEMBERNAME_FIELDS_DO(macro) \ 4224 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 4225 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 4226 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \ 4227 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \ 4228 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false) 4229 4230 void java_lang_invoke_MemberName::compute_offsets() { 4231 InstanceKlass* k = vmClasses::MemberName_klass(); 4232 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4233 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4234 } 4235 4236 #if INCLUDE_CDS 4237 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) { 4238 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4239 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4240 } 4241 #endif 4242 4243 #define RESOLVEDMETHOD_FIELDS_DO(macro) \ 4244 macro(_vmholder_offset, k, "vmholder", class_signature, false) 4245 4246 void java_lang_invoke_ResolvedMethodName::compute_offsets() { 4247 InstanceKlass* k = vmClasses::ResolvedMethodName_klass(); 4248 assert(k != nullptr, "jdk mismatch"); 4249 RESOLVEDMETHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4250 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4251 } 4252 4253 #if INCLUDE_CDS 4254 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) { 4255 RESOLVEDMETHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4256 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4257 } 4258 #endif 4259 4260 #define LAMBDAFORM_FIELDS_DO(macro) \ 4261 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false) 4262 4263 void java_lang_invoke_LambdaForm::compute_offsets() { 4264 InstanceKlass* k = vmClasses::LambdaForm_klass(); 4265 assert (k != nullptr, "jdk mismatch"); 4266 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4267 } 4268 4269 #if INCLUDE_CDS 4270 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) { 4271 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4272 } 4273 #endif 4274 4275 bool java_lang_invoke_LambdaForm::is_instance(oop obj) { 4276 return obj != nullptr && is_subclass(obj->klass()); 4277 } 4278 4279 int jdk_internal_foreign_abi_NativeEntryPoint::_method_type_offset; 4280 int jdk_internal_foreign_abi_NativeEntryPoint::_downcall_stub_address_offset; 4281 4282 #define NEP_FIELDS_DO(macro) \ 4283 macro(_method_type_offset, k, "methodType", java_lang_invoke_MethodType_signature, false); \ 4284 macro(_downcall_stub_address_offset, k, "downcallStubAddress", long_signature, false); 4285 4286 bool jdk_internal_foreign_abi_NativeEntryPoint::is_instance(oop obj) { 4287 return obj != nullptr && is_subclass(obj->klass()); 4288 } 4289 4290 void jdk_internal_foreign_abi_NativeEntryPoint::compute_offsets() { 4291 InstanceKlass* k = vmClasses::NativeEntryPoint_klass(); 4292 NEP_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4293 } 4294 4295 #if INCLUDE_CDS 4296 void jdk_internal_foreign_abi_NativeEntryPoint::serialize_offsets(SerializeClosure* f) { 4297 NEP_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4298 } 4299 #endif 4300 4301 oop jdk_internal_foreign_abi_NativeEntryPoint::method_type(oop entry) { 4302 return entry->obj_field(_method_type_offset); 4303 } 4304 4305 jlong jdk_internal_foreign_abi_NativeEntryPoint::downcall_stub_address(oop entry) { 4306 return entry->long_field(_downcall_stub_address_offset); 4307 } 4308 4309 int jdk_internal_foreign_abi_ABIDescriptor::_inputStorage_offset; 4310 int jdk_internal_foreign_abi_ABIDescriptor::_outputStorage_offset; 4311 int jdk_internal_foreign_abi_ABIDescriptor::_volatileStorage_offset; 4312 int jdk_internal_foreign_abi_ABIDescriptor::_stackAlignment_offset; 4313 int jdk_internal_foreign_abi_ABIDescriptor::_shadowSpace_offset; 4314 int jdk_internal_foreign_abi_ABIDescriptor::_scratch1_offset; 4315 int jdk_internal_foreign_abi_ABIDescriptor::_scratch2_offset; 4316 4317 #define ABIDescriptor_FIELDS_DO(macro) \ 4318 macro(_inputStorage_offset, k, "inputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \ 4319 macro(_outputStorage_offset, k, "outputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \ 4320 macro(_volatileStorage_offset, k, "volatileStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \ 4321 macro(_stackAlignment_offset, k, "stackAlignment", int_signature, false); \ 4322 macro(_shadowSpace_offset, k, "shadowSpace", int_signature, false); \ 4323 macro(_scratch1_offset, k, "scratch1", jdk_internal_foreign_abi_VMStorage_signature, false); \ 4324 macro(_scratch2_offset, k, "scratch2", jdk_internal_foreign_abi_VMStorage_signature, false); 4325 4326 bool jdk_internal_foreign_abi_ABIDescriptor::is_instance(oop obj) { 4327 return obj != nullptr && is_subclass(obj->klass()); 4328 } 4329 4330 void jdk_internal_foreign_abi_ABIDescriptor::compute_offsets() { 4331 InstanceKlass* k = vmClasses::ABIDescriptor_klass(); 4332 ABIDescriptor_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4333 } 4334 4335 #if INCLUDE_CDS 4336 void jdk_internal_foreign_abi_ABIDescriptor::serialize_offsets(SerializeClosure* f) { 4337 ABIDescriptor_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4338 } 4339 #endif 4340 4341 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::inputStorage(oop entry) { 4342 return oop_cast<objArrayOop>(entry->obj_field(_inputStorage_offset)); 4343 } 4344 4345 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::outputStorage(oop entry) { 4346 return oop_cast<objArrayOop>(entry->obj_field(_outputStorage_offset)); 4347 } 4348 4349 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::volatileStorage(oop entry) { 4350 return oop_cast<objArrayOop>(entry->obj_field(_volatileStorage_offset)); 4351 } 4352 4353 jint jdk_internal_foreign_abi_ABIDescriptor::stackAlignment(oop entry) { 4354 return entry->int_field(_stackAlignment_offset); 4355 } 4356 4357 jint jdk_internal_foreign_abi_ABIDescriptor::shadowSpace(oop entry) { 4358 return entry->int_field(_shadowSpace_offset); 4359 } 4360 4361 oop jdk_internal_foreign_abi_ABIDescriptor::scratch1(oop entry) { 4362 return entry->obj_field(_scratch1_offset); 4363 } 4364 4365 oop jdk_internal_foreign_abi_ABIDescriptor::scratch2(oop entry) { 4366 return entry->obj_field(_scratch2_offset); 4367 } 4368 4369 int jdk_internal_foreign_abi_VMStorage::_type_offset; 4370 int jdk_internal_foreign_abi_VMStorage::_indexOrOffset_offset; 4371 int jdk_internal_foreign_abi_VMStorage::_segmentMaskOrSize_offset; 4372 int jdk_internal_foreign_abi_VMStorage::_debugName_offset; 4373 4374 #define VMStorage_FIELDS_DO(macro) \ 4375 macro(_type_offset, k, "type", byte_signature, false); \ 4376 macro(_indexOrOffset_offset, k, "indexOrOffset", int_signature, false); \ 4377 macro(_segmentMaskOrSize_offset, k, "segmentMaskOrSize", short_signature, false); \ 4378 macro(_debugName_offset, k, "debugName", string_signature, false); \ 4379 4380 bool jdk_internal_foreign_abi_VMStorage::is_instance(oop obj) { 4381 return obj != nullptr && is_subclass(obj->klass()); 4382 } 4383 4384 void jdk_internal_foreign_abi_VMStorage::compute_offsets() { 4385 InstanceKlass* k = vmClasses::VMStorage_klass(); 4386 VMStorage_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4387 } 4388 4389 #if INCLUDE_CDS 4390 void jdk_internal_foreign_abi_VMStorage::serialize_offsets(SerializeClosure* f) { 4391 VMStorage_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4392 } 4393 #endif 4394 4395 jbyte jdk_internal_foreign_abi_VMStorage::type(oop entry) { 4396 return entry->byte_field(_type_offset); 4397 } 4398 4399 jint jdk_internal_foreign_abi_VMStorage::index_or_offset(oop entry) { 4400 return entry->int_field(_indexOrOffset_offset); 4401 } 4402 4403 jshort jdk_internal_foreign_abi_VMStorage::segment_mask_or_size(oop entry) { 4404 return entry->short_field(_segmentMaskOrSize_offset); 4405 } 4406 4407 oop jdk_internal_foreign_abi_VMStorage::debugName(oop entry) { 4408 return entry->obj_field(_debugName_offset); 4409 } 4410 4411 int jdk_internal_foreign_abi_CallConv::_argRegs_offset; 4412 int jdk_internal_foreign_abi_CallConv::_retRegs_offset; 4413 4414 #define CallConv_FIELDS_DO(macro) \ 4415 macro(_argRegs_offset, k, "argRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \ 4416 macro(_retRegs_offset, k, "retRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \ 4417 4418 bool jdk_internal_foreign_abi_CallConv::is_instance(oop obj) { 4419 return obj != nullptr && is_subclass(obj->klass()); 4420 } 4421 4422 void jdk_internal_foreign_abi_CallConv::compute_offsets() { 4423 InstanceKlass* k = vmClasses::CallConv_klass(); 4424 CallConv_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4425 } 4426 4427 #if INCLUDE_CDS 4428 void jdk_internal_foreign_abi_CallConv::serialize_offsets(SerializeClosure* f) { 4429 CallConv_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4430 } 4431 #endif 4432 4433 objArrayOop jdk_internal_foreign_abi_CallConv::argRegs(oop entry) { 4434 return oop_cast<objArrayOop>(entry->obj_field(_argRegs_offset)); 4435 } 4436 4437 objArrayOop jdk_internal_foreign_abi_CallConv::retRegs(oop entry) { 4438 return oop_cast<objArrayOop>(entry->obj_field(_retRegs_offset)); 4439 } 4440 4441 oop java_lang_invoke_MethodHandle::type(oop mh) { 4442 return mh->obj_field(_type_offset); 4443 } 4444 4445 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) { 4446 mh->obj_field_put(_type_offset, mtype); 4447 } 4448 4449 oop java_lang_invoke_MethodHandle::form(oop mh) { 4450 assert(_form_offset != 0, ""); 4451 return mh->obj_field(_form_offset); 4452 } 4453 4454 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) { 4455 assert(_form_offset != 0, ""); 4456 mh->obj_field_put(_form_offset, lform); 4457 } 4458 4459 /// MemberName accessors 4460 4461 oop java_lang_invoke_MemberName::clazz(oop mname) { 4462 assert(is_instance(mname), "wrong type"); 4463 return mname->obj_field(_clazz_offset); 4464 } 4465 4466 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) { 4467 assert(is_instance(mname), "wrong type"); 4468 mname->obj_field_put(_clazz_offset, clazz); 4469 } 4470 4471 oop java_lang_invoke_MemberName::name(oop mname) { 4472 assert(is_instance(mname), "wrong type"); 4473 return mname->obj_field(_name_offset); 4474 } 4475 4476 void java_lang_invoke_MemberName::set_name(oop mname, oop name) { 4477 assert(is_instance(mname), "wrong type"); 4478 mname->obj_field_put(_name_offset, name); 4479 } 4480 4481 oop java_lang_invoke_MemberName::type(oop mname) { 4482 assert(is_instance(mname), "wrong type"); 4483 return mname->obj_field(_type_offset); 4484 } 4485 4486 void java_lang_invoke_MemberName::set_type(oop mname, oop type) { 4487 assert(is_instance(mname), "wrong type"); 4488 mname->obj_field_put(_type_offset, type); 4489 } 4490 4491 int java_lang_invoke_MemberName::flags(oop mname) { 4492 assert(is_instance(mname), "wrong type"); 4493 return mname->int_field(_flags_offset); 4494 } 4495 4496 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) { 4497 assert(is_instance(mname), "wrong type"); 4498 mname->int_field_put(_flags_offset, flags); 4499 } 4500 4501 4502 // Return vmtarget from ResolvedMethodName method field through indirection 4503 Method* java_lang_invoke_MemberName::vmtarget(oop mname) { 4504 assert(is_instance(mname), "wrong type"); 4505 oop method = mname->obj_field(_method_offset); 4506 return method == nullptr ? nullptr : java_lang_invoke_ResolvedMethodName::vmtarget(method); 4507 } 4508 4509 bool java_lang_invoke_MemberName::is_method(oop mname) { 4510 assert(is_instance(mname), "must be MemberName"); 4511 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0; 4512 } 4513 4514 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) { 4515 assert(is_instance(mname), "wrong type"); 4516 mname->obj_field_put(_method_offset, resolved_method); 4517 } 4518 4519 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) { 4520 assert(is_instance(mname), "wrong type"); 4521 return (intptr_t) mname->address_field(_vmindex_offset); 4522 } 4523 4524 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) { 4525 assert(is_instance(mname), "wrong type"); 4526 mname->address_field_put(_vmindex_offset, (address) index); 4527 } 4528 4529 4530 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) { 4531 assert(is_instance(resolved_method), "wrong type"); 4532 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset); 4533 assert(m->is_method(), "must be"); 4534 return m; 4535 } 4536 4537 // Used by redefinition to change Method* to new Method* with same hash (name, signature) 4538 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) { 4539 assert(is_instance(resolved_method), "wrong type"); 4540 resolved_method->address_field_put(_vmtarget_offset, (address)m); 4541 } 4542 4543 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) { 4544 assert(is_instance(resolved_method), "wrong type"); 4545 resolved_method->obj_field_put(_vmholder_offset, holder); 4546 } 4547 4548 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) { 4549 const Method* method = m(); 4550 4551 // lookup ResolvedMethod oop in the table, or create a new one and intern it 4552 oop resolved_method = ResolvedMethodTable::find_method(method); 4553 if (resolved_method != nullptr) { 4554 return resolved_method; 4555 } 4556 4557 InstanceKlass* k = vmClasses::ResolvedMethodName_klass(); 4558 if (!k->is_initialized()) { 4559 k->initialize(CHECK_NULL); 4560 } 4561 4562 oop new_resolved_method = k->allocate_instance(CHECK_NULL); 4563 4564 NoSafepointVerifier nsv; 4565 4566 if (method->is_old()) { 4567 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() : 4568 method->get_new_method(); 4569 } 4570 4571 InstanceKlass* holder = method->method_holder(); 4572 4573 set_vmtarget(new_resolved_method, const_cast<Method*>(method)); 4574 // Add a reference to the loader (actually mirror because hidden classes may not have 4575 // distinct loaders) to ensure the metadata is kept alive. 4576 // This mirror may be different than the one in clazz field. 4577 set_vmholder(new_resolved_method, holder->java_mirror()); 4578 4579 // Set flag in class to indicate this InstanceKlass has entries in the table 4580 // to avoid walking table during redefinition if none of the redefined classes 4581 // have any membernames in the table. 4582 holder->set_has_resolved_methods(); 4583 4584 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method)); 4585 } 4586 4587 oop java_lang_invoke_LambdaForm::vmentry(oop lform) { 4588 assert(is_instance(lform), "wrong type"); 4589 return lform->obj_field(_vmentry_offset); 4590 } 4591 4592 4593 // Support for java_lang_invoke_MethodType 4594 4595 int java_lang_invoke_MethodType::_rtype_offset; 4596 int java_lang_invoke_MethodType::_ptypes_offset; 4597 4598 #define METHODTYPE_FIELDS_DO(macro) \ 4599 macro(_rtype_offset, k, "rtype", class_signature, false); \ 4600 macro(_ptypes_offset, k, "ptypes", class_array_signature, false) 4601 4602 void java_lang_invoke_MethodType::compute_offsets() { 4603 InstanceKlass* k = vmClasses::MethodType_klass(); 4604 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4605 } 4606 4607 #if INCLUDE_CDS 4608 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) { 4609 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4610 } 4611 #endif 4612 4613 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) { 4614 st->print("("); 4615 objArrayOop pts = ptypes(mt); 4616 if (pts != nullptr) { 4617 for (int i = 0, limit = pts->length(); i < limit; i++) { 4618 java_lang_Class::print_signature(pts->obj_at(i), st); 4619 } 4620 } else { 4621 st->print("null"); 4622 } 4623 st->print(")"); 4624 oop rt = rtype(mt); 4625 if (rt != nullptr) { 4626 java_lang_Class::print_signature(rt, st); 4627 } else { 4628 st->print("null"); 4629 } 4630 } 4631 4632 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) { 4633 ResourceMark rm; 4634 stringStream buffer(128); 4635 print_signature(mt, &buffer); 4636 const char* sigstr = buffer.base(); 4637 int siglen = (int) buffer.size(); 4638 Symbol *name; 4639 if (!intern_if_not_found) { 4640 name = SymbolTable::probe(sigstr, siglen); 4641 } else { 4642 name = SymbolTable::new_symbol(sigstr, siglen); 4643 } 4644 return name; 4645 } 4646 4647 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) { 4648 if (mt1 == mt2) 4649 return true; 4650 if (rtype(mt1) != rtype(mt2)) 4651 return false; 4652 if (ptype_count(mt1) != ptype_count(mt2)) 4653 return false; 4654 for (int i = ptype_count(mt1) - 1; i >= 0; i--) { 4655 if (ptype(mt1, i) != ptype(mt2, i)) 4656 return false; 4657 } 4658 return true; 4659 } 4660 4661 oop java_lang_invoke_MethodType::rtype(oop mt) { 4662 assert(is_instance(mt), "must be a MethodType"); 4663 return mt->obj_field(_rtype_offset); 4664 } 4665 4666 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) { 4667 assert(is_instance(mt), "must be a MethodType"); 4668 return (objArrayOop) mt->obj_field(_ptypes_offset); 4669 } 4670 4671 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) { 4672 return ptypes(mt)->obj_at(idx); 4673 } 4674 4675 int java_lang_invoke_MethodType::ptype_count(oop mt) { 4676 return ptypes(mt)->length(); 4677 } 4678 4679 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) { 4680 objArrayOop pts = ptypes(mt); 4681 int count = pts->length(); 4682 int slots = 0; 4683 for (int i = 0; i < count; i++) { 4684 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i)); 4685 slots += type2size[bt]; 4686 } 4687 return slots; 4688 } 4689 4690 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) { 4691 BasicType bt = java_lang_Class::as_BasicType(rtype(mt)); 4692 return type2size[bt]; 4693 } 4694 4695 4696 // Support for java_lang_invoke_CallSite 4697 4698 int java_lang_invoke_CallSite::_target_offset; 4699 int java_lang_invoke_CallSite::_vmdependencies_offset; 4700 int java_lang_invoke_CallSite::_last_cleanup_offset; 4701 4702 #define CALLSITE_FIELDS_DO(macro) \ 4703 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \ 4704 4705 void java_lang_invoke_CallSite::compute_offsets() { 4706 InstanceKlass* k = vmClasses::CallSite_klass(); 4707 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4708 CALLSITE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4709 } 4710 4711 #if INCLUDE_CDS 4712 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) { 4713 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4714 CALLSITE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4715 } 4716 #endif 4717 4718 DependencyContext java_lang_invoke_CallSite::vmdependencies(oop call_site) { 4719 assert(java_lang_invoke_CallSite::is_instance(call_site), ""); 4720 nmethodBucket* volatile* vmdeps_addr = call_site->field_addr<nmethodBucket* volatile>(_vmdependencies_offset); 4721 volatile uint64_t* last_cleanup_addr = call_site->field_addr<volatile uint64_t>(_last_cleanup_offset); 4722 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr); 4723 return dep_ctx; 4724 } 4725 4726 // Support for java_lang_invoke_ConstantCallSite 4727 4728 int java_lang_invoke_ConstantCallSite::_is_frozen_offset; 4729 4730 #define CONSTANTCALLSITE_FIELDS_DO(macro) \ 4731 macro(_is_frozen_offset, k, "isFrozen", bool_signature, false) 4732 4733 void java_lang_invoke_ConstantCallSite::compute_offsets() { 4734 InstanceKlass* k = vmClasses::ConstantCallSite_klass(); 4735 CONSTANTCALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4736 } 4737 4738 #if INCLUDE_CDS 4739 void java_lang_invoke_ConstantCallSite::serialize_offsets(SerializeClosure* f) { 4740 CONSTANTCALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4741 } 4742 #endif 4743 4744 // Support for java_lang_ClassLoader 4745 4746 int java_lang_ClassLoader::_loader_data_offset; 4747 int java_lang_ClassLoader::_parallelCapable_offset; 4748 int java_lang_ClassLoader::_name_offset; 4749 int java_lang_ClassLoader::_nameAndId_offset; 4750 int java_lang_ClassLoader::_unnamedModule_offset; 4751 int java_lang_ClassLoader::_parent_offset; 4752 4753 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) { 4754 assert(loader != nullptr, "loader must not be null"); 4755 assert(oopDesc::is_oop(loader), "loader must be oop"); 4756 return Atomic::load_acquire(loader->field_addr<ClassLoaderData*>(_loader_data_offset)); 4757 } 4758 4759 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) { 4760 assert(loader != nullptr, "loader must not be null"); 4761 assert(oopDesc::is_oop(loader), "loader must be oop"); 4762 return *loader->field_addr<ClassLoaderData*>(_loader_data_offset); 4763 } 4764 4765 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) { 4766 assert(loader != nullptr, "loader must not be null"); 4767 assert(oopDesc::is_oop(loader), "loader must be oop"); 4768 Atomic::release_store(loader->field_addr<ClassLoaderData*>(_loader_data_offset), new_data); 4769 } 4770 4771 #define CLASSLOADER_FIELDS_DO(macro) \ 4772 macro(_parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \ 4773 macro(_name_offset, k1, vmSymbols::name_name(), string_signature, false); \ 4774 macro(_nameAndId_offset, k1, "nameAndId", string_signature, false); \ 4775 macro(_unnamedModule_offset, k1, "unnamedModule", module_signature, false); \ 4776 macro(_parent_offset, k1, "parent", classloader_signature, false) 4777 4778 void java_lang_ClassLoader::compute_offsets() { 4779 InstanceKlass* k1 = vmClasses::ClassLoader_klass(); 4780 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4781 4782 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4783 } 4784 4785 #if INCLUDE_CDS 4786 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) { 4787 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4788 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4789 } 4790 #endif 4791 4792 oop java_lang_ClassLoader::parent(oop loader) { 4793 assert(is_instance(loader), "loader must be oop"); 4794 return loader->obj_field(_parent_offset); 4795 } 4796 4797 oop java_lang_ClassLoader::parent_no_keepalive(oop loader) { 4798 assert(is_instance(loader), "loader must be oop"); 4799 return loader->obj_field_access<AS_NO_KEEPALIVE>(_parent_offset); 4800 } 4801 4802 // Returns the name field of this class loader. If the name field has not 4803 // been set, null will be returned. 4804 oop java_lang_ClassLoader::name(oop loader) { 4805 assert(is_instance(loader), "loader must be oop"); 4806 return loader->obj_field(_name_offset); 4807 } 4808 4809 // Returns the nameAndId field of this class loader. The format is 4810 // as follows: 4811 // If the defining loader has a name explicitly set then '<loader-name>' @<id> 4812 // If the defining loader has no name then <qualified-class-name> @<id> 4813 // If built-in loader, then omit '@<id>' as there is only one instance. 4814 // Use ClassLoader::loader_name_id() to obtain this String as a char*. 4815 oop java_lang_ClassLoader::nameAndId(oop loader) { 4816 assert(is_instance(loader), "loader must be oop"); 4817 return loader->obj_field(_nameAndId_offset); 4818 } 4819 4820 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) { 4821 assert(is_instance(loader), "loader must be oop"); 4822 assert(cl == nullptr || is_instance(cl), "cl argument must be oop"); 4823 oop acl = loader; 4824 debug_only(jint loop_count = 0); 4825 // This loop taken verbatim from ClassLoader.java: 4826 do { 4827 acl = parent(acl); 4828 if (cl == acl) { 4829 return true; 4830 } 4831 assert(++loop_count > 0, "loop_count overflow"); 4832 } while (acl != nullptr); 4833 return false; 4834 } 4835 4836 bool java_lang_ClassLoader::is_instance(oop obj) { 4837 return obj != nullptr && is_subclass(obj->klass()); 4838 } 4839 4840 4841 // For class loader classes, parallelCapable defined 4842 // based on non-null field 4843 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it 4844 bool java_lang_ClassLoader::parallelCapable(oop class_loader) { 4845 assert(_parallelCapable_offset != 0, "offsets should have been initialized"); 4846 return (class_loader->obj_field(_parallelCapable_offset) != nullptr); 4847 } 4848 4849 bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 4850 oop cl = SystemDictionary::java_system_loader(); 4851 while(cl != nullptr) { 4852 if (cl == loader) return true; 4853 cl = parent(cl); 4854 } 4855 return false; 4856 } 4857 4858 oop java_lang_ClassLoader::unnamedModule(oop loader) { 4859 assert(is_instance(loader), "loader must be oop"); 4860 return loader->obj_field(_unnamedModule_offset); 4861 } 4862 4863 // Support for java_lang_System 4864 // 4865 4866 int java_lang_System::_static_in_offset; 4867 int java_lang_System::_static_out_offset; 4868 int java_lang_System::_static_err_offset; 4869 4870 #define SYSTEM_FIELDS_DO(macro) \ 4871 macro(_static_in_offset, k, "in", input_stream_signature, true); \ 4872 macro(_static_out_offset, k, "out", print_stream_signature, true); \ 4873 macro(_static_err_offset, k, "err", print_stream_signature, true); 4874 4875 void java_lang_System::compute_offsets() { 4876 InstanceKlass* k = vmClasses::System_klass(); 4877 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4878 } 4879 4880 #if INCLUDE_CDS 4881 void java_lang_System::serialize_offsets(SerializeClosure* f) { 4882 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4883 } 4884 #endif 4885 4886 // Support for jdk_internal_misc_UnsafeConstants 4887 // 4888 class UnsafeConstantsFixup : public FieldClosure { 4889 private: 4890 int _address_size; 4891 int _page_size; 4892 bool _big_endian; 4893 bool _use_unaligned_access; 4894 int _data_cache_line_flush_size; 4895 public: 4896 UnsafeConstantsFixup() { 4897 // round up values for all static final fields 4898 _address_size = sizeof(void*); 4899 _page_size = AIX_ONLY(sysconf(_SC_PAGESIZE)) NOT_AIX((int)os::vm_page_size()); 4900 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true); 4901 _use_unaligned_access = UseUnalignedAccesses; 4902 _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size(); 4903 } 4904 4905 void do_field(fieldDescriptor* fd) { 4906 oop mirror = fd->field_holder()->java_mirror(); 4907 assert(mirror != nullptr, "UnsafeConstants must have mirror already"); 4908 assert(fd->field_holder() == vmClasses::UnsafeConstants_klass(), "Should be UnsafeConstants"); 4909 assert(fd->is_final(), "fields of UnsafeConstants must be final"); 4910 assert(fd->is_static(), "fields of UnsafeConstants must be static"); 4911 if (fd->name() == vmSymbols::address_size_name()) { 4912 mirror->int_field_put(fd->offset(), _address_size); 4913 } else if (fd->name() == vmSymbols::page_size_name()) { 4914 mirror->int_field_put(fd->offset(), _page_size); 4915 } else if (fd->name() == vmSymbols::big_endian_name()) { 4916 mirror->bool_field_put(fd->offset(), _big_endian); 4917 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) { 4918 mirror->bool_field_put(fd->offset(), _use_unaligned_access); 4919 } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) { 4920 mirror->int_field_put(fd->offset(), _data_cache_line_flush_size); 4921 } else { 4922 assert(false, "unexpected UnsafeConstants field"); 4923 } 4924 } 4925 }; 4926 4927 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() { 4928 UnsafeConstantsFixup fixup; 4929 vmClasses::UnsafeConstants_klass()->do_local_static_fields(&fixup); 4930 } 4931 4932 4933 // java_lang_StackTraceElement 4934 4935 int java_lang_StackTraceElement::_methodName_offset; 4936 int java_lang_StackTraceElement::_fileName_offset; 4937 int java_lang_StackTraceElement::_lineNumber_offset; 4938 int java_lang_StackTraceElement::_moduleName_offset; 4939 int java_lang_StackTraceElement::_moduleVersion_offset; 4940 int java_lang_StackTraceElement::_classLoaderName_offset; 4941 int java_lang_StackTraceElement::_declaringClass_offset; 4942 int java_lang_StackTraceElement::_declaringClassObject_offset; 4943 4944 #define STACKTRACEELEMENT_FIELDS_DO(macro) \ 4945 macro(_declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \ 4946 macro(_classLoaderName_offset, k, "classLoaderName", string_signature, false); \ 4947 macro(_moduleName_offset, k, "moduleName", string_signature, false); \ 4948 macro(_moduleVersion_offset, k, "moduleVersion", string_signature, false); \ 4949 macro(_declaringClass_offset, k, "declaringClass", string_signature, false); \ 4950 macro(_methodName_offset, k, "methodName", string_signature, false); \ 4951 macro(_fileName_offset, k, "fileName", string_signature, false); \ 4952 macro(_lineNumber_offset, k, "lineNumber", int_signature, false) 4953 4954 // Support for java_lang_StackTraceElement 4955 void java_lang_StackTraceElement::compute_offsets() { 4956 InstanceKlass* k = vmClasses::StackTraceElement_klass(); 4957 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4958 } 4959 4960 #if INCLUDE_CDS 4961 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) { 4962 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4963 } 4964 #endif 4965 4966 void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 4967 element->obj_field_put(_fileName_offset, value); 4968 } 4969 4970 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 4971 element->obj_field_put(_declaringClass_offset, value); 4972 } 4973 4974 void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 4975 element->obj_field_put(_methodName_offset, value); 4976 } 4977 4978 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 4979 element->int_field_put(_lineNumber_offset, value); 4980 } 4981 4982 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) { 4983 element->obj_field_put(_moduleName_offset, value); 4984 } 4985 4986 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) { 4987 element->obj_field_put(_moduleVersion_offset, value); 4988 } 4989 4990 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) { 4991 element->obj_field_put(_classLoaderName_offset, value); 4992 } 4993 4994 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) { 4995 element->obj_field_put(_declaringClassObject_offset, value); 4996 } 4997 4998 4999 // java_lang_AssertionStatusDirectives 5000 5001 int java_lang_AssertionStatusDirectives::_classes_offset; 5002 int java_lang_AssertionStatusDirectives::_classEnabled_offset; 5003 int java_lang_AssertionStatusDirectives::_packages_offset; 5004 int java_lang_AssertionStatusDirectives::_packageEnabled_offset; 5005 int java_lang_AssertionStatusDirectives::_deflt_offset; 5006 5007 // Support for java Assertions - java_lang_AssertionStatusDirectives. 5008 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \ 5009 macro(_classes_offset, k, "classes", string_array_signature, false); \ 5010 macro(_classEnabled_offset, k, "classEnabled", bool_array_signature, false); \ 5011 macro(_packages_offset, k, "packages", string_array_signature, false); \ 5012 macro(_packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \ 5013 macro(_deflt_offset, k, "deflt", bool_signature, false) 5014 5015 void java_lang_AssertionStatusDirectives::compute_offsets() { 5016 InstanceKlass* k = vmClasses::AssertionStatusDirectives_klass(); 5017 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5018 } 5019 5020 #if INCLUDE_CDS 5021 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) { 5022 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5023 } 5024 #endif 5025 5026 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 5027 o->obj_field_put(_classes_offset, val); 5028 } 5029 5030 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 5031 o->obj_field_put(_classEnabled_offset, val); 5032 } 5033 5034 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 5035 o->obj_field_put(_packages_offset, val); 5036 } 5037 5038 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 5039 o->obj_field_put(_packageEnabled_offset, val); 5040 } 5041 5042 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 5043 o->bool_field_put(_deflt_offset, val); 5044 } 5045 5046 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset; 5047 5048 #define AOS_FIELDS_DO(macro) \ 5049 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false) 5050 5051 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() { 5052 InstanceKlass* k = vmClasses::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass(); 5053 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5054 } 5055 5056 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 5057 assert(_owner_offset != 0, "Must be initialized"); 5058 return obj->obj_field(_owner_offset); 5059 } 5060 5061 #if INCLUDE_CDS 5062 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) { 5063 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5064 } 5065 #endif 5066 5067 int vector_VectorPayload::_payload_offset; 5068 5069 #define VECTORPAYLOAD_FIELDS_DO(macro) \ 5070 macro(_payload_offset, k, "payload", object_signature, false) 5071 5072 void vector_VectorPayload::compute_offsets() { 5073 InstanceKlass* k = vmClasses::vector_VectorPayload_klass(); 5074 VECTORPAYLOAD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5075 } 5076 5077 #if INCLUDE_CDS 5078 void vector_VectorPayload::serialize_offsets(SerializeClosure* f) { 5079 VECTORPAYLOAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5080 } 5081 #endif 5082 5083 void vector_VectorPayload::set_payload(oop o, oop val) { 5084 o->obj_field_put(_payload_offset, val); 5085 } 5086 5087 bool vector_VectorPayload::is_instance(oop obj) { 5088 return obj != nullptr && is_subclass(obj->klass()); 5089 } 5090 5091 int java_lang_Integer_IntegerCache::_static_cache_offset; 5092 int java_lang_Long_LongCache::_static_cache_offset; 5093 int java_lang_Character_CharacterCache::_static_cache_offset; 5094 int java_lang_Short_ShortCache::_static_cache_offset; 5095 int java_lang_Byte_ByteCache::_static_cache_offset; 5096 5097 #define INTEGER_CACHE_FIELDS_DO(macro) \ 5098 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true) 5099 5100 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) { 5101 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5102 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5103 } 5104 5105 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) { 5106 oop base = ik->static_field_base_raw(); 5107 return objArrayOop(base->obj_field(_static_cache_offset)); 5108 } 5109 5110 Symbol* java_lang_Integer_IntegerCache::symbol() { 5111 return vmSymbols::java_lang_Integer_IntegerCache(); 5112 } 5113 5114 #if INCLUDE_CDS 5115 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) { 5116 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5117 } 5118 #endif 5119 #undef INTEGER_CACHE_FIELDS_DO 5120 5121 jint java_lang_Integer::value(oop obj) { 5122 jvalue v; 5123 java_lang_boxing_object::get_value(obj, &v); 5124 return v.i; 5125 } 5126 5127 #define LONG_CACHE_FIELDS_DO(macro) \ 5128 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true) 5129 5130 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) { 5131 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5132 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5133 } 5134 5135 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) { 5136 oop base = ik->static_field_base_raw(); 5137 return objArrayOop(base->obj_field(_static_cache_offset)); 5138 } 5139 5140 Symbol* java_lang_Long_LongCache::symbol() { 5141 return vmSymbols::java_lang_Long_LongCache(); 5142 } 5143 5144 #if INCLUDE_CDS 5145 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) { 5146 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5147 } 5148 #endif 5149 #undef LONG_CACHE_FIELDS_DO 5150 5151 jlong java_lang_Long::value(oop obj) { 5152 jvalue v; 5153 java_lang_boxing_object::get_value(obj, &v); 5154 return v.j; 5155 } 5156 5157 #define CHARACTER_CACHE_FIELDS_DO(macro) \ 5158 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true) 5159 5160 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) { 5161 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5162 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5163 } 5164 5165 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) { 5166 oop base = ik->static_field_base_raw(); 5167 return objArrayOop(base->obj_field(_static_cache_offset)); 5168 } 5169 5170 Symbol* java_lang_Character_CharacterCache::symbol() { 5171 return vmSymbols::java_lang_Character_CharacterCache(); 5172 } 5173 5174 #if INCLUDE_CDS 5175 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) { 5176 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5177 } 5178 #endif 5179 #undef CHARACTER_CACHE_FIELDS_DO 5180 5181 jchar java_lang_Character::value(oop obj) { 5182 jvalue v; 5183 java_lang_boxing_object::get_value(obj, &v); 5184 return v.c; 5185 } 5186 5187 #define SHORT_CACHE_FIELDS_DO(macro) \ 5188 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true) 5189 5190 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) { 5191 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5192 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5193 } 5194 5195 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) { 5196 oop base = ik->static_field_base_raw(); 5197 return objArrayOop(base->obj_field(_static_cache_offset)); 5198 } 5199 5200 Symbol* java_lang_Short_ShortCache::symbol() { 5201 return vmSymbols::java_lang_Short_ShortCache(); 5202 } 5203 5204 #if INCLUDE_CDS 5205 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) { 5206 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5207 } 5208 #endif 5209 #undef SHORT_CACHE_FIELDS_DO 5210 5211 jshort java_lang_Short::value(oop obj) { 5212 jvalue v; 5213 java_lang_boxing_object::get_value(obj, &v); 5214 return v.s; 5215 } 5216 5217 #define BYTE_CACHE_FIELDS_DO(macro) \ 5218 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true) 5219 5220 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) { 5221 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5222 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5223 } 5224 5225 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) { 5226 oop base = ik->static_field_base_raw(); 5227 return objArrayOop(base->obj_field(_static_cache_offset)); 5228 } 5229 5230 Symbol* java_lang_Byte_ByteCache::symbol() { 5231 return vmSymbols::java_lang_Byte_ByteCache(); 5232 } 5233 5234 #if INCLUDE_CDS 5235 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) { 5236 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5237 } 5238 #endif 5239 #undef BYTE_CACHE_FIELDS_DO 5240 5241 jbyte java_lang_Byte::value(oop obj) { 5242 jvalue v; 5243 java_lang_boxing_object::get_value(obj, &v); 5244 return v.b; 5245 } 5246 5247 int java_lang_Boolean::_static_TRUE_offset; 5248 int java_lang_Boolean::_static_FALSE_offset; 5249 5250 #define BOOLEAN_FIELDS_DO(macro) \ 5251 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \ 5252 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true) 5253 5254 5255 void java_lang_Boolean::compute_offsets(InstanceKlass *k) { 5256 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5257 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5258 } 5259 5260 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) { 5261 oop base = ik->static_field_base_raw(); 5262 return base->obj_field(_static_TRUE_offset); 5263 } 5264 5265 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) { 5266 oop base = ik->static_field_base_raw(); 5267 return base->obj_field(_static_FALSE_offset); 5268 } 5269 5270 Symbol* java_lang_Boolean::symbol() { 5271 return vmSymbols::java_lang_Boolean(); 5272 } 5273 5274 #if INCLUDE_CDS 5275 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) { 5276 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5277 } 5278 #endif 5279 #undef BOOLEAN_CACHE_FIELDS_DO 5280 5281 jboolean java_lang_Boolean::value(oop obj) { 5282 jvalue v; 5283 java_lang_boxing_object::get_value(obj, &v); 5284 return v.z; 5285 } 5286 5287 // java_lang_reflect_RecordComponent 5288 5289 int java_lang_reflect_RecordComponent::_clazz_offset; 5290 int java_lang_reflect_RecordComponent::_name_offset; 5291 int java_lang_reflect_RecordComponent::_type_offset; 5292 int java_lang_reflect_RecordComponent::_accessor_offset; 5293 int java_lang_reflect_RecordComponent::_signature_offset; 5294 int java_lang_reflect_RecordComponent::_annotations_offset; 5295 int java_lang_reflect_RecordComponent::_typeAnnotations_offset; 5296 5297 #define RECORDCOMPONENT_FIELDS_DO(macro) \ 5298 macro(_clazz_offset, k, "clazz", class_signature, false); \ 5299 macro(_name_offset, k, "name", string_signature, false); \ 5300 macro(_type_offset, k, "type", class_signature, false); \ 5301 macro(_accessor_offset, k, "accessor", reflect_method_signature, false); \ 5302 macro(_signature_offset, k, "signature", string_signature, false); \ 5303 macro(_annotations_offset, k, "annotations", byte_array_signature, false); \ 5304 macro(_typeAnnotations_offset, k, "typeAnnotations", byte_array_signature, false); 5305 5306 // Support for java_lang_reflect_RecordComponent 5307 void java_lang_reflect_RecordComponent::compute_offsets() { 5308 InstanceKlass* k = vmClasses::RecordComponent_klass(); 5309 RECORDCOMPONENT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5310 } 5311 5312 #if INCLUDE_CDS 5313 void java_lang_reflect_RecordComponent::serialize_offsets(SerializeClosure* f) { 5314 RECORDCOMPONENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5315 } 5316 #endif 5317 5318 void java_lang_reflect_RecordComponent::set_clazz(oop element, oop value) { 5319 element->obj_field_put(_clazz_offset, value); 5320 } 5321 5322 void java_lang_reflect_RecordComponent::set_name(oop element, oop value) { 5323 element->obj_field_put(_name_offset, value); 5324 } 5325 5326 void java_lang_reflect_RecordComponent::set_type(oop element, oop value) { 5327 element->obj_field_put(_type_offset, value); 5328 } 5329 5330 void java_lang_reflect_RecordComponent::set_accessor(oop element, oop value) { 5331 element->obj_field_put(_accessor_offset, value); 5332 } 5333 5334 void java_lang_reflect_RecordComponent::set_signature(oop element, oop value) { 5335 element->obj_field_put(_signature_offset, value); 5336 } 5337 5338 void java_lang_reflect_RecordComponent::set_annotations(oop element, oop value) { 5339 element->obj_field_put(_annotations_offset, value); 5340 } 5341 5342 void java_lang_reflect_RecordComponent::set_typeAnnotations(oop element, oop value) { 5343 element->obj_field_put(_typeAnnotations_offset, value); 5344 } 5345 5346 // java_lang_InternalError 5347 int java_lang_InternalError::_during_unsafe_access_offset; 5348 5349 void java_lang_InternalError::set_during_unsafe_access(oop internal_error) { 5350 internal_error->bool_field_put(_during_unsafe_access_offset, true); 5351 } 5352 5353 jboolean java_lang_InternalError::during_unsafe_access(oop internal_error) { 5354 return internal_error->bool_field(_during_unsafe_access_offset); 5355 } 5356 5357 void java_lang_InternalError::compute_offsets() { 5358 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 5359 } 5360 5361 #if INCLUDE_CDS 5362 void java_lang_InternalError::serialize_offsets(SerializeClosure* f) { 5363 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 5364 } 5365 #endif 5366 5367 #define BASIC_JAVA_CLASSES_DO_PART1(f) \ 5368 f(java_lang_Class) \ 5369 f(java_lang_String) \ 5370 f(java_lang_ref_Reference) \ 5371 //end 5372 5373 #define BASIC_JAVA_CLASSES_DO_PART2(f) \ 5374 f(java_lang_System) \ 5375 f(java_lang_ClassLoader) \ 5376 f(java_lang_Throwable) \ 5377 f(java_lang_Thread) \ 5378 f(java_lang_Thread_FieldHolder) \ 5379 f(java_lang_Thread_Constants) \ 5380 f(java_lang_ThreadGroup) \ 5381 f(java_lang_VirtualThread) \ 5382 f(java_lang_InternalError) \ 5383 f(java_lang_AssertionStatusDirectives) \ 5384 f(java_lang_ref_SoftReference) \ 5385 f(java_lang_invoke_MethodHandle) \ 5386 f(java_lang_invoke_DirectMethodHandle) \ 5387 f(java_lang_invoke_MemberName) \ 5388 f(java_lang_invoke_ResolvedMethodName) \ 5389 f(java_lang_invoke_LambdaForm) \ 5390 f(java_lang_invoke_MethodType) \ 5391 f(java_lang_invoke_CallSite) \ 5392 f(java_lang_invoke_ConstantCallSite) \ 5393 f(java_lang_reflect_AccessibleObject) \ 5394 f(java_lang_reflect_Method) \ 5395 f(java_lang_reflect_Constructor) \ 5396 f(java_lang_reflect_Field) \ 5397 f(java_lang_reflect_RecordComponent) \ 5398 f(reflect_ConstantPool) \ 5399 f(java_lang_reflect_Parameter) \ 5400 f(java_lang_Module) \ 5401 f(java_lang_StackTraceElement) \ 5402 f(java_lang_ClassFrameInfo) \ 5403 f(java_lang_StackFrameInfo) \ 5404 f(java_lang_LiveStackFrameInfo) \ 5405 f(jdk_internal_vm_ContinuationScope) \ 5406 f(jdk_internal_vm_Continuation) \ 5407 f(jdk_internal_vm_StackChunk) \ 5408 f(java_util_concurrent_locks_AbstractOwnableSynchronizer) \ 5409 f(jdk_internal_foreign_abi_NativeEntryPoint) \ 5410 f(jdk_internal_foreign_abi_ABIDescriptor) \ 5411 f(jdk_internal_foreign_abi_VMStorage) \ 5412 f(jdk_internal_foreign_abi_CallConv) \ 5413 f(jdk_internal_misc_UnsafeConstants) \ 5414 f(java_lang_boxing_object) \ 5415 f(vector_VectorPayload) \ 5416 //end 5417 5418 #define BASIC_JAVA_CLASSES_DO(f) \ 5419 BASIC_JAVA_CLASSES_DO_PART1(f) \ 5420 BASIC_JAVA_CLASSES_DO_PART2(f) 5421 5422 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets(); 5423 5424 // Compute field offsets of all the classes in this file 5425 void JavaClasses::compute_offsets() { 5426 if (CDSConfig::is_using_archive()) { 5427 JVMTI_ONLY(assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() && 5428 JvmtiExport::has_early_class_hook_env()), 5429 "JavaClasses::compute_offsets() must be called in early JVMTI phase.")); 5430 // None of the classes used by the rest of this function can be replaced by 5431 // JVMTI ClassFileLoadHook. 5432 // We are safe to use the archived offsets, which have already been restored 5433 // by JavaClasses::serialize_offsets, without computing the offsets again. 5434 return; 5435 } 5436 5437 // We have already called the compute_offsets() of the 5438 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String, java_lang_Class and 5439 // java_lang_ref_Reference) earlier inside vmClasses::resolve_all() 5440 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS); 5441 } 5442 5443 #if INCLUDE_CDS 5444 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc); 5445 5446 void JavaClasses::serialize_offsets(SerializeClosure* soc) { 5447 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS); 5448 } 5449 #endif 5450 5451 #if INCLUDE_CDS_JAVA_HEAP 5452 bool JavaClasses::is_supported_for_archiving(oop obj) { 5453 Klass* klass = obj->klass(); 5454 5455 if (!CDSConfig::is_dumping_invokedynamic()) { 5456 // These are supported by CDS only when CDSConfig::is_dumping_invokedynamic() is enabled. 5457 if (klass == vmClasses::ResolvedMethodName_klass() || 5458 klass == vmClasses::MemberName_klass()) { 5459 return false; 5460 } 5461 } 5462 5463 if (klass->is_subclass_of(vmClasses::Reference_klass())) { 5464 // It's problematic to archive Reference objects. One of the reasons is that 5465 // Reference::discovered may pull in unwanted objects (see JDK-8284336) 5466 return false; 5467 } 5468 5469 return true; 5470 } 5471 #endif 5472 5473 #ifndef PRODUCT 5474 5475 // These functions exist to assert the validity of de-serialized offsets in boxing object as a sanity check. 5476 5477 bool JavaClasses::check_offset(const char *klass_name, int deserialized_offset, const char *field_name, 5478 const char* field_sig) { 5479 EXCEPTION_MARK; 5480 fieldDescriptor fd; 5481 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name); 5482 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 5483 InstanceKlass* ik = InstanceKlass::cast(k); 5484 TempNewSymbol f_name = SymbolTable::new_symbol(field_name); 5485 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig); 5486 if (!ik->find_local_field(f_name, f_sig, &fd)) { 5487 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 5488 return false; 5489 } 5490 if (fd.is_static()) { 5491 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 5492 return false; 5493 } 5494 if (fd.offset() == deserialized_offset ) { 5495 return true; 5496 } else { 5497 tty->print_cr("Offset of nonstatic field %s.%s is deserialized as %d but should really be %d.", 5498 klass_name, field_name, deserialized_offset, fd.offset()); 5499 return false; 5500 } 5501 } 5502 5503 void JavaClasses::check_offsets() { 5504 bool valid = true; 5505 5506 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 5507 valid &= check_offset(klass_name, cpp_klass_name :: _##field_name ## _offset, #field_name, field_sig) 5508 5509 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 5510 valid &= check_offset(klass_name, cpp_klass_name :: _##long_ ## field_name ## _offset, #field_name, field_sig) 5511 5512 // Boxed primitive objects (java_lang_boxing_object) 5513 5514 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 5515 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 5516 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 5517 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 5518 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 5519 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 5520 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 5521 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 5522 5523 if (!valid) vm_exit_during_initialization("Field offset verification failed"); 5524 } 5525 5526 #endif // PRODUCT 5527 5528 int InjectedField::compute_offset() { 5529 InstanceKlass* ik = InstanceKlass::cast(klass()); 5530 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 5531 if (!may_be_java && !fs.field_flags().is_injected()) { 5532 // Only look at injected fields 5533 continue; 5534 } 5535 if (fs.name() == name() && fs.signature() == signature()) { 5536 return fs.offset(); 5537 } 5538 } 5539 ResourceMark rm; 5540 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)" : ""); 5541 #ifndef PRODUCT 5542 ik->print(); 5543 tty->print_cr("all fields:"); 5544 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 5545 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()); 5546 } 5547 #endif //PRODUCT 5548 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class"); 5549 return -1; 5550 } 5551 5552 void javaClasses_init() { 5553 JavaClasses::compute_offsets(); 5554 JavaClasses::check_offsets(); 5555 FilteredFieldsMap::initialize(); // must be done after computing offsets. 5556 }