1 /* 2 * Copyright (c) 1997, 2024, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "cds/archiveBuilder.hpp" 27 #include "cds/archiveHeapLoader.hpp" 28 #include "cds/cdsConfig.hpp" 29 #include "cds/heapShared.hpp" 30 #include "cds/metaspaceShared.hpp" 31 #include "classfile/altHashing.hpp" 32 #include "classfile/classLoaderData.inline.hpp" 33 #include "classfile/javaClasses.inline.hpp" 34 #include "classfile/javaClassesImpl.hpp" 35 #include "classfile/javaThreadStatus.hpp" 36 #include "classfile/moduleEntry.hpp" 37 #include "classfile/stringTable.hpp" 38 #include "classfile/symbolTable.hpp" 39 #include "classfile/systemDictionary.hpp" 40 #include "classfile/vmClasses.hpp" 41 #include "classfile/vmSymbols.hpp" 42 #include "code/debugInfo.hpp" 43 #include "code/dependencyContext.hpp" 44 #include "code/pcDesc.hpp" 45 #include "gc/shared/collectedHeap.inline.hpp" 46 #include "interpreter/interpreter.hpp" 47 #include "interpreter/linkResolver.hpp" 48 #include "jvm.h" 49 #include "logging/log.hpp" 50 #include "logging/logStream.hpp" 51 #include "memory/oopFactory.hpp" 52 #include "memory/resourceArea.hpp" 53 #include "memory/universe.hpp" 54 #include "oops/fieldInfo.hpp" 55 #include "oops/fieldStreams.inline.hpp" 56 #include "oops/instanceKlass.inline.hpp" 57 #include "oops/instanceMirrorKlass.hpp" 58 #include "oops/klass.hpp" 59 #include "oops/klass.inline.hpp" 60 #include "oops/method.inline.hpp" 61 #include "oops/objArrayKlass.hpp" 62 #include "oops/objArrayOop.inline.hpp" 63 #include "oops/oopCast.inline.hpp" 64 #include "oops/oop.inline.hpp" 65 #include "oops/symbol.hpp" 66 #include "oops/recordComponent.hpp" 67 #include "oops/typeArrayOop.inline.hpp" 68 #include "prims/jvmtiExport.hpp" 69 #include "prims/methodHandles.hpp" 70 #include "prims/resolvedMethodTable.hpp" 71 #include "runtime/continuationEntry.inline.hpp" 72 #include "runtime/continuationJavaClasses.inline.hpp" 73 #include "runtime/fieldDescriptor.inline.hpp" 74 #include "runtime/frame.inline.hpp" 75 #include "runtime/handles.inline.hpp" 76 #include "runtime/handshake.hpp" 77 #include "runtime/init.hpp" 78 #include "runtime/interfaceSupport.inline.hpp" 79 #include "runtime/java.hpp" 80 #include "runtime/javaCalls.hpp" 81 #include "runtime/javaThread.hpp" 82 #include "runtime/jniHandles.inline.hpp" 83 #include "runtime/reflectionUtils.hpp" 84 #include "runtime/safepoint.hpp" 85 #include "runtime/safepointVerifiers.hpp" 86 #include "runtime/threadSMR.hpp" 87 #include "runtime/vframe.inline.hpp" 88 #include "runtime/vm_version.hpp" 89 #include "utilities/align.hpp" 90 #include "utilities/globalDefinitions.hpp" 91 #include "utilities/growableArray.hpp" 92 #include "utilities/preserveException.hpp" 93 #include "utilities/utf8.hpp" 94 #if INCLUDE_JVMCI 95 #include "jvmci/jvmciJavaClasses.hpp" 96 #endif 97 98 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \ 99 { VM_CLASS_ID(klass), VM_SYMBOL_ENUM_NAME(name##_name), VM_SYMBOL_ENUM_NAME(signature), may_be_java }, 100 101 InjectedField JavaClasses::_injected_fields[] = { 102 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD) 103 }; 104 105 // Register native methods of Object 106 void java_lang_Object::register_natives(TRAPS) { 107 InstanceKlass* obj = vmClasses::Object_klass(); 108 Method::register_native(obj, vmSymbols::hashCode_name(), 109 vmSymbols::void_int_signature(), (address) &JVM_IHashCode, CHECK); 110 Method::register_native(obj, vmSymbols::wait_name(), 111 vmSymbols::long_void_signature(), (address) &JVM_MonitorWait, CHECK); 112 Method::register_native(obj, vmSymbols::notify_name(), 113 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotify, CHECK); 114 Method::register_native(obj, vmSymbols::notifyAll_name(), 115 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotifyAll, CHECK); 116 Method::register_native(obj, vmSymbols::clone_name(), 117 vmSymbols::void_object_signature(), (address) &JVM_Clone, THREAD); 118 } 119 120 int JavaClasses::compute_injected_offset(InjectedFieldID id) { 121 return _injected_fields[(int)id].compute_offset(); 122 } 123 124 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) { 125 *field_count = 0; 126 127 vmSymbolID sid = vmSymbols::find_sid(class_name); 128 if (sid == vmSymbolID::NO_SID) { 129 // Only well known classes can inject fields 130 return nullptr; 131 } 132 133 int count = 0; 134 int start = -1; 135 136 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \ 137 if (sid == VM_SYMBOL_ENUM_NAME(klass)) { \ 138 count++; \ 139 if (start == -1) { \ 140 start = (int)InjectedFieldID::klass##_##name##_enum; \ 141 } \ 142 } 143 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD); 144 #undef LOOKUP_INJECTED_FIELD 145 146 if (start != -1) { 147 *field_count = count; 148 return _injected_fields + start; 149 } 150 return nullptr; 151 } 152 153 154 // Helpful routine for computing field offsets at run time rather than hardcoding them 155 // Finds local fields only, including static fields. Static field offsets are from the 156 // beginning of the mirror. 157 void JavaClasses::compute_offset(int &dest_offset, 158 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol, 159 bool is_static) { 160 fieldDescriptor fd; 161 if (ik == nullptr) { 162 ResourceMark rm; 163 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string()); 164 vm_exit_during_initialization("Invalid layout of well-known class"); 165 } 166 167 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) { 168 ResourceMark rm; 169 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(), 170 name_symbol->as_C_string(), signature_symbol->as_C_string()); 171 #ifndef PRODUCT 172 // Prints all fields and offsets 173 Log(class) lt; 174 LogStream ls(lt.error()); 175 ik->print_on(&ls); 176 #endif //PRODUCT 177 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class"); 178 } 179 dest_offset = fd.offset(); 180 } 181 182 // Overloading to pass name as a string. 183 void JavaClasses::compute_offset(int& dest_offset, InstanceKlass* ik, 184 const char* name_string, Symbol* signature_symbol, 185 bool is_static) { 186 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string)); 187 if (name == nullptr) { 188 ResourceMark rm; 189 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string); 190 vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name()); 191 } 192 compute_offset(dest_offset, ik, name, signature_symbol, is_static); 193 } 194 195 // java_lang_String 196 197 int java_lang_String::_value_offset; 198 int java_lang_String::_hash_offset; 199 int java_lang_String::_hashIsZero_offset; 200 int java_lang_String::_coder_offset; 201 int java_lang_String::_flags_offset; 202 203 bool java_lang_String::_initialized; 204 205 206 bool java_lang_String::test_and_set_flag(oop java_string, uint8_t flag_mask) { 207 uint8_t* addr = flags_addr(java_string); 208 uint8_t value = Atomic::load(addr); 209 while ((value & flag_mask) == 0) { 210 uint8_t old_value = value; 211 value |= flag_mask; 212 value = Atomic::cmpxchg(addr, old_value, value); 213 if (value == old_value) return false; // Flag bit changed from 0 to 1. 214 } 215 return true; // Flag bit is already 1. 216 } 217 218 #define STRING_FIELDS_DO(macro) \ 219 macro(_value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \ 220 macro(_hash_offset, k, "hash", int_signature, false); \ 221 macro(_hashIsZero_offset, k, "hashIsZero", bool_signature, false); \ 222 macro(_coder_offset, k, "coder", byte_signature, false); 223 224 void java_lang_String::compute_offsets() { 225 if (_initialized) { 226 return; 227 } 228 229 InstanceKlass* k = vmClasses::String_klass(); 230 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET); 231 STRING_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 232 233 _initialized = true; 234 } 235 236 #if INCLUDE_CDS 237 void java_lang_String::serialize_offsets(SerializeClosure* f) { 238 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 239 STRING_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 240 f->do_bool(&_initialized); 241 } 242 #endif 243 244 class CompactStringsFixup : public FieldClosure { 245 private: 246 bool _value; 247 248 public: 249 CompactStringsFixup(bool value) : _value(value) {} 250 251 void do_field(fieldDescriptor* fd) { 252 if (fd->name() == vmSymbols::compact_strings_name()) { 253 oop mirror = fd->field_holder()->java_mirror(); 254 assert(fd->field_holder() == vmClasses::String_klass(), "Should be String"); 255 assert(mirror != nullptr, "String must have mirror already"); 256 mirror->bool_field_put(fd->offset(), _value); 257 } 258 } 259 }; 260 261 void java_lang_String::set_compact_strings(bool value) { 262 CompactStringsFixup fix(value); 263 vmClasses::String_klass()->do_local_static_fields(&fix); 264 } 265 266 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) { 267 assert(_initialized, "Must be initialized"); 268 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings"); 269 270 // Create the String object first, so there's a chance that the String 271 // and the char array it points to end up in the same cache line. 272 oop obj; 273 obj = vmClasses::String_klass()->allocate_instance(CHECK_NH); 274 275 // Create the char array. The String object must be handlized here 276 // because GC can happen as a result of the allocation attempt. 277 Handle h_obj(THREAD, obj); 278 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16. 279 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);; 280 281 // Point the String at the char array 282 obj = h_obj(); 283 set_value(obj, buffer); 284 // No need to zero the offset, allocation zero'ed the entire String object 285 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16); 286 return h_obj; 287 } 288 289 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) { 290 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length); 291 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 292 typeArrayOop buffer = value(h_obj()); 293 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]"); 294 if (is_latin1) { 295 for (int index = 0; index < length; index++) { 296 buffer->byte_at_put(index, (jbyte)unicode[index]); 297 } 298 } else { 299 for (int index = 0; index < length; index++) { 300 buffer->char_at_put(index, unicode[index]); 301 } 302 } 303 304 #ifdef ASSERT 305 { 306 ResourceMark rm; 307 size_t utf8_len = static_cast<size_t>(length); 308 char* expected = UNICODE::as_utf8(unicode, utf8_len); 309 char* actual = as_utf8_string(h_obj()); 310 if (strcmp(expected, actual) != 0) { 311 fatal("Unicode conversion failure: %s --> %s", expected, actual); 312 } 313 } 314 #endif 315 316 return h_obj; 317 } 318 319 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) { 320 Handle h_obj = create_from_unicode(unicode, length, CHECK_NULL); 321 return h_obj(); 322 } 323 324 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) { 325 if (utf8_str == nullptr) { 326 return Handle(); 327 } 328 bool has_multibyte, is_latin1; 329 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte); 330 if (!CompactStrings) { 331 has_multibyte = true; 332 is_latin1 = false; 333 } 334 335 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 336 if (length > 0) { 337 if (!has_multibyte) { 338 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str); 339 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length); 340 } else if (is_latin1) { 341 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 342 } else { 343 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 344 } 345 } 346 347 #ifdef ASSERT 348 // This check is too strict when the input string is not a valid UTF8. 349 // For example, it may be created with arbitrary content via jni_NewStringUTF. 350 if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, strlen(utf8_str), false)) { 351 ResourceMark rm; 352 const char* expected = utf8_str; 353 char* actual = as_utf8_string(h_obj()); 354 if (strcmp(expected, actual) != 0) { 355 fatal("String conversion failure: %s --> %s", expected, actual); 356 } 357 } 358 #endif 359 360 return h_obj; 361 } 362 363 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) { 364 Handle h_obj = create_from_str(utf8_str, CHECK_NULL); 365 return h_obj(); 366 } 367 368 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) { 369 const char* utf8_str = (char*)symbol->bytes(); 370 int utf8_len = symbol->utf8_length(); 371 372 bool has_multibyte, is_latin1; 373 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte); 374 if (!CompactStrings) { 375 has_multibyte = true; 376 is_latin1 = false; 377 } 378 379 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 380 if (length > 0) { 381 if (!has_multibyte) { 382 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str); 383 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length); 384 } else if (is_latin1) { 385 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 386 } else { 387 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 388 } 389 } 390 391 #ifdef ASSERT 392 { 393 ResourceMark rm; 394 const char* expected = symbol->as_utf8(); 395 char* actual = as_utf8_string(h_obj()); 396 if (strncmp(expected, actual, utf8_len) != 0) { 397 fatal("Symbol conversion failure: %s --> %s", expected, actual); 398 } 399 } 400 #endif 401 402 return h_obj; 403 } 404 405 // Converts a C string to a Java String based on current encoding 406 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) { 407 assert(str != nullptr, "bad arguments"); 408 409 typedef jstring (JNICALL *to_java_string_fn_t)(JNIEnv*, const char *); 410 static to_java_string_fn_t _to_java_string_fn = nullptr; 411 412 if (_to_java_string_fn == nullptr) { 413 void *lib_handle = os::native_java_library(); 414 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "JNU_NewStringPlatform")); 415 #if defined(_WIN32) && !defined(_WIN64) 416 if (_to_java_string_fn == nullptr) { 417 // On 32 bit Windows, also try __stdcall decorated name 418 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "_JNU_NewStringPlatform@8")); 419 } 420 #endif 421 if (_to_java_string_fn == nullptr) { 422 fatal("JNU_NewStringPlatform missing"); 423 } 424 } 425 426 jstring js = nullptr; 427 { 428 JavaThread* thread = THREAD; 429 HandleMark hm(thread); 430 ThreadToNativeFromVM ttn(thread); 431 js = (_to_java_string_fn)(thread->jni_environment(), str); 432 } 433 434 Handle native_platform_string(THREAD, JNIHandles::resolve(js)); 435 JNIHandles::destroy_local(js); // destroy local JNIHandle. 436 return native_platform_string; 437 } 438 439 // Converts a Java String to a native C string that can be used for 440 // native OS calls. 441 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) { 442 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*); 443 static to_platform_string_fn_t _to_platform_string_fn = nullptr; 444 445 if (_to_platform_string_fn == nullptr) { 446 void *lib_handle = os::native_java_library(); 447 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars")); 448 if (_to_platform_string_fn == nullptr) { 449 fatal("GetStringPlatformChars missing"); 450 } 451 } 452 453 char *native_platform_string; 454 jstring js; 455 { JavaThread* thread = THREAD; 456 js = (jstring) JNIHandles::make_local(thread, java_string()); 457 HandleMark hm(thread); 458 ThreadToNativeFromVM ttn(thread); 459 JNIEnv *env = thread->jni_environment(); 460 bool is_copy; 461 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy); 462 assert(is_copy == JNI_TRUE, "is_copy value changed"); 463 } 464 465 // Uses a store barrier and therefore needs to be in vm state 466 JNIHandles::destroy_local(js); 467 468 return native_platform_string; 469 } 470 471 Handle java_lang_String::externalize_classname(Symbol* java_name, TRAPS) { 472 ResourceMark rm(THREAD); 473 return create_from_str(java_name->as_klass_external_name(), THREAD); 474 } 475 476 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) { 477 jchar* result = as_unicode_string_or_null(java_string, length); 478 if (result == nullptr) { 479 THROW_MSG_NULL(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string"); 480 } 481 return result; 482 } 483 484 jchar* java_lang_String::as_unicode_string_or_null(oop java_string, int& length) { 485 typeArrayOop value = java_lang_String::value(java_string); 486 length = java_lang_String::length(java_string, value); 487 bool is_latin1 = java_lang_String::is_latin1(java_string); 488 489 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length); 490 if (result != nullptr) { 491 if (!is_latin1) { 492 for (int index = 0; index < length; index++) { 493 result[index] = value->char_at(index); 494 } 495 } else { 496 for (int index = 0; index < length; index++) { 497 result[index] = ((jchar) value->byte_at(index)) & 0xff; 498 } 499 } 500 } 501 return result; 502 } 503 504 inline unsigned int java_lang_String::hash_code_impl(oop java_string, bool update) { 505 // The hash and hashIsZero fields are subject to a benign data race, 506 // making it crucial to ensure that any observable result of the 507 // calculation in this method stays correct under any possible read of 508 // these fields. Necessary restrictions to allow this to be correct 509 // without explicit memory fences or similar concurrency primitives is 510 // that we can ever only write to one of these two fields for a given 511 // String instance, and that the computation is idempotent and derived 512 // from immutable state 513 assert(_initialized && (_hash_offset > 0) && (_hashIsZero_offset > 0), "Must be initialized"); 514 if (java_lang_String::hash_is_set(java_string)) { 515 return java_string->int_field(_hash_offset); 516 } 517 518 typeArrayOop value = java_lang_String::value(java_string); 519 int length = java_lang_String::length(java_string, value); 520 bool is_latin1 = java_lang_String::is_latin1(java_string); 521 522 unsigned int hash = 0; 523 if (length > 0) { 524 if (is_latin1) { 525 hash = java_lang_String::hash_code(value->byte_at_addr(0), length); 526 } else { 527 hash = java_lang_String::hash_code(value->char_at_addr(0), length); 528 } 529 } 530 531 if (update) { 532 if (hash != 0) { 533 java_string->int_field_put(_hash_offset, hash); 534 } else { 535 java_string->bool_field_put(_hashIsZero_offset, true); 536 } 537 } 538 return hash; 539 } 540 541 unsigned int java_lang_String::hash_code(oop java_string) { 542 return hash_code_impl(java_string, /*update=*/true); 543 } 544 545 unsigned int java_lang_String::hash_code_noupdate(oop java_string) { 546 return hash_code_impl(java_string, /*update=*/false); 547 } 548 549 550 char* java_lang_String::as_quoted_ascii(oop java_string) { 551 typeArrayOop value = java_lang_String::value(java_string); 552 int length = java_lang_String::length(java_string, value); 553 bool is_latin1 = java_lang_String::is_latin1(java_string); 554 555 if (length == 0) return nullptr; 556 557 char* result; 558 size_t result_length; 559 if (!is_latin1) { 560 jchar* base = value->char_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 } else { 565 jbyte* base = value->byte_at_addr(0); 566 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 567 result = NEW_RESOURCE_ARRAY(char, result_length); 568 UNICODE::as_quoted_ascii(base, length, result, result_length); 569 } 570 assert(result_length >= (size_t)length + 1, "must not be shorter"); 571 assert(result_length == strlen(result) + 1, "must match"); 572 return result; 573 } 574 575 Symbol* java_lang_String::as_symbol(oop java_string) { 576 typeArrayOop value = java_lang_String::value(java_string); 577 int length = java_lang_String::length(java_string, value); 578 bool is_latin1 = java_lang_String::is_latin1(java_string); 579 if (!is_latin1) { 580 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0); 581 Symbol* sym = SymbolTable::new_symbol(base, length); 582 return sym; 583 } else { 584 ResourceMark rm; 585 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0); 586 size_t utf8_len = static_cast<size_t>(length); 587 const char* base = UNICODE::as_utf8(position, utf8_len); 588 Symbol* sym = SymbolTable::new_symbol(base, checked_cast<int>(utf8_len)); 589 return sym; 590 } 591 } 592 593 Symbol* java_lang_String::as_symbol_or_null(oop java_string) { 594 typeArrayOop value = java_lang_String::value(java_string); 595 int length = java_lang_String::length(java_string, value); 596 bool is_latin1 = java_lang_String::is_latin1(java_string); 597 if (!is_latin1) { 598 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0); 599 return SymbolTable::probe_unicode(base, length); 600 } else { 601 ResourceMark rm; 602 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0); 603 size_t utf8_len = static_cast<size_t>(length); 604 const char* base = UNICODE::as_utf8(position, utf8_len); 605 return SymbolTable::probe(base, checked_cast<int>(utf8_len)); 606 } 607 } 608 609 size_t java_lang_String::utf8_length(oop java_string, typeArrayOop value) { 610 assert(value_equals(value, java_lang_String::value(java_string)), 611 "value must be same as java_lang_String::value(java_string)"); 612 int length = java_lang_String::length(java_string, value); 613 if (length == 0) { 614 return 0; 615 } 616 if (!java_lang_String::is_latin1(java_string)) { 617 return UNICODE::utf8_length(value->char_at_addr(0), length); 618 } else { 619 return UNICODE::utf8_length(value->byte_at_addr(0), length); 620 } 621 } 622 623 size_t java_lang_String::utf8_length(oop java_string) { 624 typeArrayOop value = java_lang_String::value(java_string); 625 return utf8_length(java_string, value); 626 } 627 628 int java_lang_String::utf8_length_as_int(oop java_string) { 629 typeArrayOop value = java_lang_String::value(java_string); 630 return utf8_length_as_int(java_string, value); 631 } 632 633 int java_lang_String::utf8_length_as_int(oop java_string, typeArrayOop value) { 634 assert(value_equals(value, java_lang_String::value(java_string)), 635 "value must be same as java_lang_String::value(java_string)"); 636 int length = java_lang_String::length(java_string, value); 637 if (length == 0) { 638 return 0; 639 } 640 if (!java_lang_String::is_latin1(java_string)) { 641 return UNICODE::utf8_length_as_int(value->char_at_addr(0), length); 642 } else { 643 return UNICODE::utf8_length_as_int(value->byte_at_addr(0), length); 644 } 645 } 646 647 char* java_lang_String::as_utf8_string(oop java_string) { 648 size_t length; 649 return as_utf8_string(java_string, length); 650 } 651 652 char* java_lang_String::as_utf8_string(oop java_string, size_t& length) { 653 typeArrayOop value = java_lang_String::value(java_string); 654 // `length` is used as the incoming number of characters to 655 // convert, and then set as the number of bytes in the UTF8 sequence. 656 length = java_lang_String::length(java_string, value); 657 bool is_latin1 = java_lang_String::is_latin1(java_string); 658 if (!is_latin1) { 659 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0); 660 return UNICODE::as_utf8(position, length); 661 } else { 662 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0); 663 return UNICODE::as_utf8(position, length); 664 } 665 } 666 667 // Uses a provided buffer if it's sufficiently large, otherwise allocates 668 // a resource array to fit 669 char* java_lang_String::as_utf8_string_full(oop java_string, char* buf, size_t buflen, size_t& utf8_len) { 670 typeArrayOop value = java_lang_String::value(java_string); 671 int len = java_lang_String::length(java_string, value); 672 bool is_latin1 = java_lang_String::is_latin1(java_string); 673 if (!is_latin1) { 674 jchar *position = (len == 0) ? nullptr : value->char_at_addr(0); 675 utf8_len = UNICODE::utf8_length(position, len); 676 if (utf8_len >= buflen) { 677 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1); 678 } 679 return UNICODE::as_utf8(position, len, buf, utf8_len + 1); 680 } else { 681 jbyte *position = (len == 0) ? nullptr : value->byte_at_addr(0); 682 utf8_len = UNICODE::utf8_length(position, len); 683 if (utf8_len >= buflen) { 684 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1); 685 } 686 return UNICODE::as_utf8(position, len, buf, utf8_len + 1); 687 } 688 } 689 690 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, size_t buflen) { 691 assert(value_equals(value, java_lang_String::value(java_string)), 692 "value must be same as java_lang_String::value(java_string)"); 693 int length = java_lang_String::length(java_string, value); 694 bool is_latin1 = java_lang_String::is_latin1(java_string); 695 if (!is_latin1) { 696 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0); 697 return UNICODE::as_utf8(position, length, buf, buflen); 698 } else { 699 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0); 700 return UNICODE::as_utf8(position, length, buf, buflen); 701 } 702 } 703 704 char* java_lang_String::as_utf8_string(oop java_string, char* buf, size_t buflen) { 705 typeArrayOop value = java_lang_String::value(java_string); 706 return as_utf8_string(java_string, value, buf, buflen); 707 } 708 709 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) { 710 // `length` is used as the incoming number of characters to 711 // convert, and then set as the number of bytes in the UTF8 sequence. 712 size_t length = static_cast<size_t>(len); 713 typeArrayOop value = java_lang_String::value(java_string); 714 bool is_latin1 = java_lang_String::is_latin1(java_string); 715 assert(start + len <= java_lang_String::length(java_string), "just checking"); 716 if (!is_latin1) { 717 jchar* position = value->char_at_addr(start); 718 return UNICODE::as_utf8(position, length); 719 } else { 720 jbyte* position = value->byte_at_addr(start); 721 return UNICODE::as_utf8(position, length); 722 } 723 } 724 725 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, size_t buflen) { 726 assert(value_equals(value, java_lang_String::value(java_string)), 727 "value must be same as java_lang_String::value(java_string)"); 728 assert(start + len <= java_lang_String::length(java_string), "just checking"); 729 bool is_latin1 = java_lang_String::is_latin1(java_string); 730 if (!is_latin1) { 731 jchar* position = value->char_at_addr(start); 732 return UNICODE::as_utf8(position, len, buf, buflen); 733 } else { 734 jbyte* position = value->byte_at_addr(start); 735 return UNICODE::as_utf8(position, len, buf, buflen); 736 } 737 } 738 739 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) { 740 assert(java_string->klass() == vmClasses::String_klass(), 741 "must be java_string"); 742 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 743 int length = java_lang_String::length(java_string, value); 744 if (length != len) { 745 return false; 746 } 747 bool is_latin1 = java_lang_String::is_latin1(java_string); 748 if (!is_latin1) { 749 for (int i = 0; i < len; i++) { 750 if (value->char_at(i) != chars[i]) { 751 return false; 752 } 753 } 754 } else { 755 for (int i = 0; i < len; i++) { 756 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) { 757 return false; 758 } 759 } 760 } 761 return true; 762 } 763 764 bool java_lang_String::equals(oop str1, oop str2) { 765 assert(str1->klass() == vmClasses::String_klass(), 766 "must be java String"); 767 assert(str2->klass() == vmClasses::String_klass(), 768 "must be java String"); 769 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1); 770 bool is_latin1 = java_lang_String::is_latin1(str1); 771 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2); 772 bool is_latin2 = java_lang_String::is_latin1(str2); 773 774 if (is_latin1 != is_latin2) { 775 // Strings with different coders are never equal. 776 return false; 777 } 778 return value_equals(value1, value2); 779 } 780 781 // Print the given string to the given outputStream, limiting the output to 782 // at most max_length of the string's characters. If the length exceeds the 783 // limit we print an abridged version of the string with the "middle" elided 784 // and replaced by " ... (N characters ommitted) ... ". If max_length is odd 785 // it is treated as max_length-1. 786 void java_lang_String::print(oop java_string, outputStream* st, int max_length) { 787 assert(java_string->klass() == vmClasses::String_klass(), "must be java_string"); 788 // We need at least two characters to print A ... B 789 assert(max_length > 1, "invalid max_length: %d", max_length); 790 791 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 792 793 if (value == nullptr) { 794 // This can happen if, e.g., printing a String 795 // object before its initializer has been called 796 st->print("nullptr"); 797 return; 798 } 799 800 int length = java_lang_String::length(java_string, value); 801 bool is_latin1 = java_lang_String::is_latin1(java_string); 802 803 bool abridge = length > max_length; 804 805 st->print("\""); 806 for (int index = 0; index < length; index++) { 807 // If we need to abridge and we've printed half the allowed characters 808 // then jump to the tail of the string. 809 if (abridge && index >= max_length / 2) { 810 st->print(" ... (%d characters ommitted) ... ", length - 2 * (max_length / 2)); 811 index = length - (max_length / 2); 812 abridge = false; // only do this once 813 } 814 jchar c = (!is_latin1) ? value->char_at(index) : 815 ((jchar) value->byte_at(index)) & 0xff; 816 if (c < ' ') { 817 st->print("\\x%02X", c); // print control characters e.g. \x0A 818 } else { 819 st->print("%c", c); 820 } 821 } 822 st->print("\""); 823 824 if (length > max_length) { 825 st->print(" (abridged) "); 826 } 827 } 828 829 // java_lang_Class 830 831 int java_lang_Class::_klass_offset; 832 int java_lang_Class::_array_klass_offset; 833 int java_lang_Class::_oop_size_offset; 834 int java_lang_Class::_static_oop_field_count_offset; 835 int java_lang_Class::_class_loader_offset; 836 int java_lang_Class::_module_offset; 837 int java_lang_Class::_protection_domain_offset; 838 int java_lang_Class::_component_mirror_offset; 839 int java_lang_Class::_init_lock_offset; 840 int java_lang_Class::_signers_offset; 841 int java_lang_Class::_name_offset; 842 int java_lang_Class::_source_file_offset; 843 int java_lang_Class::_classData_offset; 844 int java_lang_Class::_classRedefinedCount_offset; 845 846 bool java_lang_Class::_offsets_computed = false; 847 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = nullptr; 848 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = nullptr; 849 850 #ifdef ASSERT 851 inline static void assert_valid_static_string_field(fieldDescriptor* fd) { 852 assert(fd->has_initial_value(), "caller should have checked this"); 853 assert(fd->field_type() == T_OBJECT, "caller should have checked this"); 854 assert(fd->signature() == vmSymbols::string_signature(), "just checking"); 855 } 856 #endif 857 858 static void initialize_static_string_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 859 DEBUG_ONLY(assert_valid_static_string_field(fd);) 860 oop string = fd->string_initial_value(CHECK); 861 mirror()->obj_field_put(fd->offset(), string); 862 } 863 864 static void initialize_static_primitive_field(fieldDescriptor* fd, Handle mirror) { 865 assert(fd->has_initial_value(), "caller should have checked this"); 866 BasicType t = fd->field_type(); 867 switch (t) { 868 case T_BYTE: 869 mirror()->byte_field_put(fd->offset(), (jbyte)(fd->int_initial_value())); 870 break; 871 case T_BOOLEAN: 872 mirror()->bool_field_put(fd->offset(), (jboolean)(fd->int_initial_value())); 873 break; 874 case T_CHAR: 875 mirror()->char_field_put(fd->offset(), (jchar)(fd->int_initial_value())); 876 break; 877 case T_SHORT: 878 mirror()->short_field_put(fd->offset(), (jshort)(fd->int_initial_value())); 879 break; 880 case T_INT: 881 mirror()->int_field_put(fd->offset(), fd->int_initial_value()); 882 break; 883 case T_FLOAT: 884 mirror()->float_field_put(fd->offset(), fd->float_initial_value()); 885 break; 886 case T_DOUBLE: 887 mirror()->double_field_put(fd->offset(), fd->double_initial_value()); 888 break; 889 case T_LONG: 890 mirror()->long_field_put(fd->offset(), fd->long_initial_value()); 891 break; 892 default: 893 // Illegal ConstantValue attribute in class file should have been 894 // caught during classfile parsing. 895 ShouldNotReachHere(); 896 } 897 } 898 899 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 900 assert(mirror.not_null() && fd->is_static(), "just checking"); 901 if (fd->has_initial_value()) { 902 if (fd->field_type() != T_OBJECT) { 903 initialize_static_primitive_field(fd, mirror); 904 } else { 905 initialize_static_string_field(fd, mirror, CHECK); 906 } 907 } 908 } 909 910 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) { 911 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already"); 912 913 // If the offset was read from the shared archive, it was fixed up already 914 if (!k->is_shared()) { 915 if (k->is_instance_klass()) { 916 // During bootstrap, java.lang.Class wasn't loaded so static field 917 // offsets were computed without the size added it. Go back and 918 // update all the static field offsets to included the size. 919 920 // Unfortunately, the FieldInfo stream is encoded with UNSIGNED5 which doesn't allow 921 // content updates. So the FieldInfo stream has to be decompressed into a temporary array, 922 // static fields offsets are updated in this array before reencoding everything into 923 // a new UNSIGNED5 stream, and substitute it to the old FieldInfo stream. 924 925 int java_fields; 926 int injected_fields; 927 InstanceKlass* ik = InstanceKlass::cast(k); 928 GrowableArray<FieldInfo>* fields = 929 FieldInfoStream::create_FieldInfoArray(ik->fieldinfo_stream(), 930 &java_fields, &injected_fields); 931 for (int i = 0; i < fields->length(); i++) { 932 FieldInfo* fi = fields->adr_at(i); 933 if (fi->access_flags().is_static()) { 934 fi->set_offset(fi->offset() + InstanceMirrorKlass::offset_of_static_fields()); 935 } 936 } 937 Array<u1>* old_stream = ik->fieldinfo_stream(); 938 assert(fields->length() == (java_fields + injected_fields), "Must be"); 939 Array<u1>* new_fis = FieldInfoStream::create_FieldInfoStream(fields, java_fields, injected_fields, k->class_loader_data(), CHECK); 940 ik->set_fieldinfo_stream(new_fis); 941 MetadataFactory::free_array<u1>(k->class_loader_data(), old_stream); 942 } 943 } 944 945 if (k->is_shared() && k->has_archived_mirror_index()) { 946 if (ArchiveHeapLoader::is_in_use()) { 947 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK); 948 assert(present, "Missing archived mirror for %s", k->external_name()); 949 return; 950 } else { 951 k->clear_java_mirror_handle(); 952 k->clear_archived_mirror_index(); 953 } 954 } 955 create_mirror(k, Handle(), Handle(), Handle(), Handle(), CHECK); 956 } 957 958 void java_lang_Class::initialize_mirror_fields(Klass* k, 959 Handle mirror, 960 Handle protection_domain, 961 Handle classData, 962 TRAPS) { 963 // Allocate a simple java object for a lock. 964 // This needs to be a java object because during class initialization 965 // it can be held across a java call. 966 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK); 967 set_init_lock(mirror(), r); 968 969 // Set protection domain also 970 set_protection_domain(mirror(), protection_domain()); 971 972 // Initialize static fields 973 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK); 974 975 // Set classData 976 set_class_data(mirror(), classData()); 977 } 978 979 // Set the java.lang.Module module field in the java_lang_Class mirror 980 void java_lang_Class::set_mirror_module_field(JavaThread* current, Klass* k, Handle mirror, Handle module) { 981 if (module.is_null()) { 982 // During startup, the module may be null only if java.base has not been defined yet. 983 // Put the class on the fixup_module_list to patch later when the java.lang.Module 984 // for java.base is known. But note that since we captured the null module another 985 // thread may have completed that initialization. 986 987 bool javabase_was_defined = false; 988 { 989 MutexLocker m1(current, Module_lock); 990 // Keep list of classes needing java.base module fixup 991 if (!ModuleEntryTable::javabase_defined()) { 992 assert(k->java_mirror() != nullptr, "Class's mirror is null"); 993 k->class_loader_data()->inc_keep_alive_ref_count(); 994 assert(fixup_module_field_list() != nullptr, "fixup_module_field_list not initialized"); 995 fixup_module_field_list()->push(k); 996 } else { 997 javabase_was_defined = true; 998 } 999 } 1000 1001 // If java.base was already defined then patch this particular class with java.base. 1002 if (javabase_was_defined) { 1003 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry(); 1004 assert(javabase_entry != nullptr && javabase_entry->module() != nullptr, 1005 "Setting class module field, " JAVA_BASE_NAME " should be defined"); 1006 Handle javabase_handle(current, javabase_entry->module()); 1007 set_module(mirror(), javabase_handle()); 1008 } 1009 } else { 1010 assert(Universe::is_module_initialized() || 1011 (ModuleEntryTable::javabase_defined() && 1012 (module() == ModuleEntryTable::javabase_moduleEntry()->module())), 1013 "Incorrect java.lang.Module specification while creating mirror"); 1014 set_module(mirror(), module()); 1015 } 1016 } 1017 1018 // Statically allocate fixup lists because they always get created. 1019 void java_lang_Class::allocate_fixup_lists() { 1020 GrowableArray<Klass*>* mirror_list = 1021 new (mtClass) GrowableArray<Klass*>(40, mtClass); 1022 set_fixup_mirror_list(mirror_list); 1023 1024 GrowableArray<Klass*>* module_list = 1025 new (mtModule) GrowableArray<Klass*>(500, mtModule); 1026 set_fixup_module_field_list(module_list); 1027 } 1028 1029 void java_lang_Class::allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData, 1030 Handle& mirror, Handle& comp_mirror, TRAPS) { 1031 // Allocate mirror (java.lang.Class instance) 1032 oop mirror_oop = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(k, CHECK); 1033 mirror = Handle(THREAD, mirror_oop); 1034 1035 // Setup indirection from mirror->klass 1036 set_klass(mirror(), k); 1037 1038 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass()); 1039 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set"); 1040 1041 set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror())); 1042 1043 // It might also have a component mirror. This mirror must already exist. 1044 if (k->is_array_klass()) { 1045 if (k->is_typeArray_klass()) { 1046 BasicType type = TypeArrayKlass::cast(k)->element_type(); 1047 if (is_scratch) { 1048 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(type)); 1049 } else { 1050 comp_mirror = Handle(THREAD, Universe::java_mirror(type)); 1051 } 1052 } else { 1053 assert(k->is_objArray_klass(), "Must be"); 1054 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass(); 1055 assert(element_klass != nullptr, "Must have an element klass"); 1056 if (is_scratch) { 1057 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass)); 1058 } else { 1059 comp_mirror = Handle(THREAD, element_klass->java_mirror()); 1060 } 1061 } 1062 assert(comp_mirror() != nullptr, "must have a mirror"); 1063 1064 // Two-way link between the array klass and its component mirror: 1065 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k 1066 set_component_mirror(mirror(), comp_mirror()); 1067 // See below for ordering dependencies between field array_klass in component mirror 1068 // and java_mirror in this klass. 1069 } else { 1070 assert(k->is_instance_klass(), "Must be"); 1071 1072 initialize_mirror_fields(k, mirror, protection_domain, classData, THREAD); 1073 if (HAS_PENDING_EXCEPTION) { 1074 // If any of the fields throws an exception like OOM remove the klass field 1075 // from the mirror so GC doesn't follow it after the klass has been deallocated. 1076 // This mirror looks like a primitive type, which logically it is because it 1077 // it represents no class. 1078 set_klass(mirror(), nullptr); 1079 return; 1080 } 1081 } 1082 } 1083 1084 void java_lang_Class::create_mirror(Klass* k, Handle class_loader, 1085 Handle module, Handle protection_domain, 1086 Handle classData, TRAPS) { 1087 assert(k != nullptr, "Use create_basic_type_mirror for primitive types"); 1088 assert(k->java_mirror() == nullptr, "should only assign mirror once"); 1089 1090 // Use this moment of initialization to cache modifier_flags also, 1091 // to support Class.getModifiers(). Instance classes recalculate 1092 // the cached flags after the class file is parsed, but before the 1093 // class is put into the system dictionary. 1094 int computed_modifiers = k->compute_modifier_flags(); 1095 k->set_modifier_flags(computed_modifiers); 1096 // Class_klass has to be loaded because it is used to allocate 1097 // the mirror. 1098 if (vmClasses::Class_klass_loaded()) { 1099 Handle mirror; 1100 Handle comp_mirror; 1101 1102 allocate_mirror(k, /*is_scratch=*/false, protection_domain, classData, mirror, comp_mirror, CHECK); 1103 1104 // set the classLoader field in the java_lang_Class instance 1105 assert(class_loader() == k->class_loader(), "should be same"); 1106 set_class_loader(mirror(), class_loader()); 1107 1108 // Setup indirection from klass->mirror 1109 // after any exceptions can happen during allocations. 1110 k->set_java_mirror(mirror); 1111 1112 // Set the module field in the java_lang_Class instance. This must be done 1113 // after the mirror is set. 1114 set_mirror_module_field(THREAD, k, mirror, module); 1115 1116 if (comp_mirror() != nullptr) { 1117 // Set after k->java_mirror() is published, because compiled code running 1118 // concurrently doesn't expect a k to have a null java_mirror. 1119 release_set_array_klass(comp_mirror(), k); 1120 } 1121 if (CDSConfig::is_dumping_heap()) { 1122 create_scratch_mirror(k, CHECK); 1123 } 1124 } else { 1125 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized"); 1126 fixup_mirror_list()->push(k); 1127 } 1128 } 1129 1130 #if INCLUDE_CDS_JAVA_HEAP 1131 // The "scratch mirror" stores the states of the mirror object that can be 1132 // decided at dump time (such as the initial values of the static fields, the 1133 // component mirror, etc). At runtime, more information is added to it by 1134 // java_lang_Class::restore_archived_mirror(). 1135 // 1136 // Essentially, /*dumptime*/create_scratch_mirror() + /*runtime*/restore_archived_mirror() 1137 // produces the same result as /*runtime*/create_mirror(). 1138 // 1139 // Note: we archive the "scratch mirror" instead of k->java_mirror(), because the 1140 // latter may contain dumptime-specific information that cannot be archived 1141 // (e.g., ClassLoaderData*, or static fields that are modified by Java code execution). 1142 void java_lang_Class::create_scratch_mirror(Klass* k, TRAPS) { 1143 if (k->class_loader() != nullptr && 1144 k->class_loader() != SystemDictionary::java_platform_loader() && 1145 k->class_loader() != SystemDictionary::java_system_loader()) { 1146 // We only archive the mirrors of classes loaded by the built-in loaders 1147 return; 1148 } 1149 1150 Handle protection_domain, classData; // set to null. Will be reinitialized at runtime 1151 Handle mirror; 1152 Handle comp_mirror; 1153 allocate_mirror(k, /*is_scratch=*/true, protection_domain, classData, mirror, comp_mirror, CHECK); 1154 1155 if (comp_mirror() != nullptr) { 1156 release_set_array_klass(comp_mirror(), k); 1157 } 1158 1159 HeapShared::set_scratch_java_mirror(k, mirror()); 1160 } 1161 1162 // Returns true if the mirror is updated, false if no archived mirror 1163 // data is present. After the archived mirror object is restored, the 1164 // shared klass' _has_raw_archived_mirror flag is cleared. 1165 bool java_lang_Class::restore_archived_mirror(Klass *k, 1166 Handle class_loader, Handle module, 1167 Handle protection_domain, TRAPS) { 1168 // Postpone restoring archived mirror until java.lang.Class is loaded. Please 1169 // see more details in vmClasses::resolve_all(). 1170 if (!vmClasses::Class_klass_loaded()) { 1171 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized"); 1172 fixup_mirror_list()->push(k); 1173 return true; 1174 } 1175 1176 oop m = k->archived_java_mirror(); 1177 assert(m != nullptr, "must have stored non-null archived mirror"); 1178 1179 // Sanity: clear it now to prevent re-initialization if any of the following fails 1180 k->clear_archived_mirror_index(); 1181 1182 // mirror is archived, restore 1183 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m)); 1184 assert(as_Klass(m) == k, "must be"); 1185 Handle mirror(THREAD, m); 1186 1187 if (!k->is_array_klass()) { 1188 // - local static final fields with initial values were initialized at dump time 1189 1190 // create the init_lock 1191 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false)); 1192 set_init_lock(mirror(), r); 1193 1194 if (protection_domain.not_null()) { 1195 set_protection_domain(mirror(), protection_domain()); 1196 } 1197 } 1198 1199 assert(class_loader() == k->class_loader(), "should be same"); 1200 if (class_loader.not_null()) { 1201 set_class_loader(mirror(), class_loader()); 1202 } 1203 1204 k->set_java_mirror(mirror); 1205 1206 set_mirror_module_field(THREAD, k, mirror, module); 1207 1208 if (log_is_enabled(Trace, cds, heap, mirror)) { 1209 ResourceMark rm(THREAD); 1210 log_trace(cds, heap, mirror)( 1211 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror())); 1212 } 1213 1214 return true; 1215 } 1216 #endif // INCLUDE_CDS_JAVA_HEAP 1217 1218 void java_lang_Class::fixup_module_field(Klass* k, Handle module) { 1219 assert(_module_offset != 0, "must have been computed already"); 1220 set_module(k->java_mirror(), module()); 1221 } 1222 1223 void java_lang_Class::set_oop_size(HeapWord* java_class, size_t size) { 1224 assert(_oop_size_offset != 0, "must be set"); 1225 assert(size > 0, "Oop size must be greater than zero, not " SIZE_FORMAT, size); 1226 assert(size <= INT_MAX, "Lossy conversion: " SIZE_FORMAT, size); 1227 *(int*)(((char*)java_class) + _oop_size_offset) = (int)size; 1228 } 1229 1230 int java_lang_Class::static_oop_field_count(oop java_class) { 1231 assert(_static_oop_field_count_offset != 0, "must be set"); 1232 return java_class->int_field(_static_oop_field_count_offset); 1233 } 1234 1235 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) { 1236 assert(_static_oop_field_count_offset != 0, "must be set"); 1237 java_class->int_field_put(_static_oop_field_count_offset, size); 1238 } 1239 1240 oop java_lang_Class::protection_domain(oop java_class) { 1241 assert(_protection_domain_offset != 0, "must be set"); 1242 return java_class->obj_field(_protection_domain_offset); 1243 } 1244 void java_lang_Class::set_protection_domain(oop java_class, oop pd) { 1245 assert(_protection_domain_offset != 0, "must be set"); 1246 java_class->obj_field_put(_protection_domain_offset, pd); 1247 } 1248 1249 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) { 1250 assert(_component_mirror_offset != 0, "must be set"); 1251 java_class->obj_field_put(_component_mirror_offset, comp_mirror); 1252 } 1253 oop java_lang_Class::component_mirror(oop java_class) { 1254 assert(_component_mirror_offset != 0, "must be set"); 1255 return java_class->obj_field(_component_mirror_offset); 1256 } 1257 1258 oop java_lang_Class::init_lock(oop java_class) { 1259 assert(_init_lock_offset != 0, "must be set"); 1260 return java_class->obj_field(_init_lock_offset); 1261 } 1262 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) { 1263 assert(_init_lock_offset != 0, "must be set"); 1264 java_class->obj_field_put(_init_lock_offset, init_lock); 1265 } 1266 1267 objArrayOop java_lang_Class::signers(oop java_class) { 1268 assert(_signers_offset != 0, "must be set"); 1269 return (objArrayOop)java_class->obj_field(_signers_offset); 1270 } 1271 1272 oop java_lang_Class::class_data(oop java_class) { 1273 assert(_classData_offset != 0, "must be set"); 1274 return java_class->obj_field(_classData_offset); 1275 } 1276 void java_lang_Class::set_class_data(oop java_class, oop class_data) { 1277 assert(_classData_offset != 0, "must be set"); 1278 java_class->obj_field_put(_classData_offset, class_data); 1279 } 1280 1281 void java_lang_Class::set_class_loader(oop java_class, oop loader) { 1282 assert(_class_loader_offset != 0, "offsets should have been initialized"); 1283 java_class->obj_field_put(_class_loader_offset, loader); 1284 } 1285 1286 oop java_lang_Class::class_loader(oop java_class) { 1287 assert(_class_loader_offset != 0, "must be set"); 1288 return java_class->obj_field(_class_loader_offset); 1289 } 1290 1291 oop java_lang_Class::module(oop java_class) { 1292 assert(_module_offset != 0, "must be set"); 1293 return java_class->obj_field(_module_offset); 1294 } 1295 1296 void java_lang_Class::set_module(oop java_class, oop module) { 1297 assert(_module_offset != 0, "must be set"); 1298 java_class->obj_field_put(_module_offset, module); 1299 } 1300 1301 oop java_lang_Class::name(Handle java_class, TRAPS) { 1302 assert(_name_offset != 0, "must be set"); 1303 oop o = java_class->obj_field(_name_offset); 1304 if (o == nullptr) { 1305 o = StringTable::intern(as_external_name(java_class()), THREAD); 1306 java_class->obj_field_put(_name_offset, o); 1307 } 1308 return o; 1309 } 1310 1311 oop java_lang_Class::source_file(oop java_class) { 1312 assert(_source_file_offset != 0, "must be set"); 1313 return java_class->obj_field(_source_file_offset); 1314 } 1315 1316 void java_lang_Class::set_source_file(oop java_class, oop source_file) { 1317 assert(_source_file_offset != 0, "must be set"); 1318 java_class->obj_field_put(_source_file_offset, source_file); 1319 } 1320 1321 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) { 1322 // This should be improved by adding a field at the Java level or by 1323 // introducing a new VM klass (see comment in ClassFileParser) 1324 oop java_class = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(nullptr, CHECK_NULL); 1325 if (type != T_VOID) { 1326 Klass* aklass = Universe::typeArrayKlass(type); 1327 assert(aklass != nullptr, "correct bootstrap"); 1328 release_set_array_klass(java_class, aklass); 1329 } 1330 #ifdef ASSERT 1331 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(vmClasses::Class_klass()); 1332 assert(static_oop_field_count(java_class) == 0, "should have been zeroed by allocation"); 1333 #endif 1334 return java_class; 1335 } 1336 1337 void java_lang_Class::set_klass(oop java_class, Klass* klass) { 1338 assert(is_instance(java_class), "must be a Class object"); 1339 java_class->metadata_field_put(_klass_offset, klass); 1340 } 1341 1342 1343 void java_lang_Class::print_signature(oop java_class, outputStream* st) { 1344 assert(is_instance(java_class), "must be a Class object"); 1345 Symbol* name = nullptr; 1346 bool is_instance = false; 1347 if (is_primitive(java_class)) { 1348 name = vmSymbols::type_signature(primitive_type(java_class)); 1349 } else { 1350 Klass* k = as_Klass(java_class); 1351 is_instance = k->is_instance_klass(); 1352 name = k->name(); 1353 } 1354 if (name == nullptr) { 1355 st->print("<null>"); 1356 return; 1357 } 1358 if (is_instance) st->print("L"); 1359 st->write((char*) name->base(), (int) name->utf8_length()); 1360 if (is_instance) st->print(";"); 1361 } 1362 1363 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) { 1364 assert(is_instance(java_class), "must be a Class object"); 1365 Symbol* name; 1366 if (is_primitive(java_class)) { 1367 name = vmSymbols::type_signature(primitive_type(java_class)); 1368 // Because this can create a new symbol, the caller has to decrement 1369 // the refcount, so make adjustment here and below for symbols returned 1370 // that are not created or incremented due to a successful lookup. 1371 name->increment_refcount(); 1372 } else { 1373 Klass* k = as_Klass(java_class); 1374 if (!k->is_instance_klass()) { 1375 name = k->name(); 1376 name->increment_refcount(); 1377 } else { 1378 ResourceMark rm; 1379 const char* sigstr = k->signature_name(); 1380 int siglen = (int) strlen(sigstr); 1381 if (!intern_if_not_found) { 1382 name = SymbolTable::probe(sigstr, siglen); 1383 } else { 1384 name = SymbolTable::new_symbol(sigstr, siglen); 1385 } 1386 } 1387 } 1388 return name; 1389 } 1390 1391 // Returns the Java name for this Java mirror (Resource allocated) 1392 // See Klass::external_name(). 1393 // For primitive type Java mirrors, its type name is returned. 1394 const char* java_lang_Class::as_external_name(oop java_class) { 1395 assert(is_instance(java_class), "must be a Class object"); 1396 const char* name = nullptr; 1397 if (is_primitive(java_class)) { 1398 name = type2name(primitive_type(java_class)); 1399 } else { 1400 name = as_Klass(java_class)->external_name(); 1401 } 1402 if (name == nullptr) { 1403 name = "<null>"; 1404 } 1405 return name; 1406 } 1407 1408 Klass* java_lang_Class::array_klass_acquire(oop java_class) { 1409 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset)); 1410 assert(k == nullptr || (k->is_klass() && k->is_array_klass()), "should be array klass"); 1411 return k; 1412 } 1413 1414 1415 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) { 1416 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass"); 1417 java_class->release_metadata_field_put(_array_klass_offset, klass); 1418 } 1419 1420 1421 BasicType java_lang_Class::primitive_type(oop java_class) { 1422 assert(is_primitive(java_class), "just checking"); 1423 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1424 BasicType type = T_VOID; 1425 if (ak != nullptr) { 1426 // Note: create_basic_type_mirror above initializes ak to a non-null value. 1427 type = ArrayKlass::cast(ak)->element_type(); 1428 } else { 1429 assert(java_class == Universe::void_mirror(), "only valid non-array primitive"); 1430 } 1431 #ifdef ASSERT 1432 if (CDSConfig::is_dumping_heap()) { 1433 oop mirror = Universe::java_mirror(type); 1434 oop scratch_mirror = HeapShared::scratch_java_mirror(type); 1435 assert(java_class == mirror || java_class == scratch_mirror, "must be consistent"); 1436 } else { 1437 assert(Universe::java_mirror(type) == java_class, "must be consistent"); 1438 } 1439 #endif 1440 return type; 1441 } 1442 1443 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) { 1444 assert(is_instance(java_class), "must be a Class object"); 1445 if (is_primitive(java_class)) { 1446 if (reference_klass != nullptr) 1447 (*reference_klass) = nullptr; 1448 return primitive_type(java_class); 1449 } else { 1450 if (reference_klass != nullptr) 1451 (*reference_klass) = as_Klass(java_class); 1452 return T_OBJECT; 1453 } 1454 } 1455 1456 1457 oop java_lang_Class::primitive_mirror(BasicType t) { 1458 oop mirror = Universe::java_mirror(t); 1459 assert(mirror != nullptr && mirror->is_a(vmClasses::Class_klass()), "must be a Class"); 1460 assert(is_primitive(mirror), "must be primitive"); 1461 return mirror; 1462 } 1463 1464 #define CLASS_FIELDS_DO(macro) \ 1465 macro(_classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false); \ 1466 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \ 1467 macro(_component_mirror_offset, k, "componentType", class_signature, false); \ 1468 macro(_module_offset, k, "module", module_signature, false); \ 1469 macro(_name_offset, k, "name", string_signature, false); \ 1470 macro(_classData_offset, k, "classData", object_signature, false); \ 1471 macro(_signers_offset, k, "signers", object_array_signature, false); 1472 1473 void java_lang_Class::compute_offsets() { 1474 if (_offsets_computed) { 1475 return; 1476 } 1477 1478 _offsets_computed = true; 1479 1480 InstanceKlass* k = vmClasses::Class_klass(); 1481 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1482 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 1483 } 1484 1485 #if INCLUDE_CDS 1486 void java_lang_Class::serialize_offsets(SerializeClosure* f) { 1487 f->do_bool(&_offsets_computed); 1488 1489 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1490 1491 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 1492 } 1493 #endif 1494 1495 int java_lang_Class::classRedefinedCount(oop the_class_mirror) { 1496 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized"); 1497 return the_class_mirror->int_field(_classRedefinedCount_offset); 1498 } 1499 1500 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) { 1501 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized"); 1502 the_class_mirror->int_field_put(_classRedefinedCount_offset, value); 1503 } 1504 1505 1506 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the 1507 // platform thread structure, and a eetop offset which was used for thread 1508 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures 1509 // merged, so in the HotSpot VM we just use the eetop field for the thread 1510 // instead of the privateInfo_offset. 1511 // 1512 // Note: The stackSize field is only present starting in 1.4. 1513 1514 int java_lang_Thread_FieldHolder::_group_offset; 1515 int java_lang_Thread_FieldHolder::_priority_offset; 1516 int java_lang_Thread_FieldHolder::_stackSize_offset; 1517 int java_lang_Thread_FieldHolder::_daemon_offset; 1518 int java_lang_Thread_FieldHolder::_thread_status_offset; 1519 1520 #define THREAD_FIELD_HOLDER_FIELDS_DO(macro) \ 1521 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \ 1522 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \ 1523 macro(_stackSize_offset, k, "stackSize", long_signature, false); \ 1524 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \ 1525 macro(_thread_status_offset, k, "threadStatus", int_signature, false) 1526 1527 void java_lang_Thread_FieldHolder::compute_offsets() { 1528 assert(_group_offset == 0, "offsets should be initialized only once"); 1529 1530 InstanceKlass* k = vmClasses::Thread_FieldHolder_klass(); 1531 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1532 } 1533 1534 #if INCLUDE_CDS 1535 void java_lang_Thread_FieldHolder::serialize_offsets(SerializeClosure* f) { 1536 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1537 } 1538 #endif 1539 1540 oop java_lang_Thread_FieldHolder::threadGroup(oop holder) { 1541 return holder->obj_field(_group_offset); 1542 } 1543 1544 ThreadPriority java_lang_Thread_FieldHolder::priority(oop holder) { 1545 return (ThreadPriority)holder->int_field(_priority_offset); 1546 } 1547 1548 void java_lang_Thread_FieldHolder::set_priority(oop holder, ThreadPriority priority) { 1549 holder->int_field_put(_priority_offset, priority); 1550 } 1551 1552 jlong java_lang_Thread_FieldHolder::stackSize(oop holder) { 1553 return holder->long_field(_stackSize_offset); 1554 } 1555 1556 bool java_lang_Thread_FieldHolder::is_daemon(oop holder) { 1557 return holder->bool_field(_daemon_offset) != 0; 1558 } 1559 1560 void java_lang_Thread_FieldHolder::set_daemon(oop holder, bool val) { 1561 assert(val, "daemon status is never turned off"); 1562 holder->bool_field_put(_daemon_offset, val); 1563 } 1564 1565 void java_lang_Thread_FieldHolder::set_thread_status(oop holder, JavaThreadStatus status) { 1566 holder->int_field_put(_thread_status_offset, static_cast<int>(status)); 1567 } 1568 1569 JavaThreadStatus java_lang_Thread_FieldHolder::get_thread_status(oop holder) { 1570 return static_cast<JavaThreadStatus>(holder->int_field(_thread_status_offset)); 1571 } 1572 1573 1574 int java_lang_Thread_Constants::_static_VTHREAD_GROUP_offset = 0; 1575 1576 #define THREAD_CONSTANTS_STATIC_FIELDS_DO(macro) \ 1577 macro(_static_VTHREAD_GROUP_offset, k, "VTHREAD_GROUP", threadgroup_signature, true); 1578 1579 void java_lang_Thread_Constants::compute_offsets() { 1580 assert(_static_VTHREAD_GROUP_offset == 0, "offsets should be initialized only once"); 1581 1582 InstanceKlass* k = vmClasses::Thread_Constants_klass(); 1583 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1584 } 1585 1586 #if INCLUDE_CDS 1587 void java_lang_Thread_Constants::serialize_offsets(SerializeClosure* f) { 1588 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1589 } 1590 #endif 1591 1592 oop java_lang_Thread_Constants::get_VTHREAD_GROUP() { 1593 InstanceKlass* k = vmClasses::Thread_Constants_klass(); 1594 oop base = k->static_field_base_raw(); 1595 return base->obj_field(_static_VTHREAD_GROUP_offset); 1596 } 1597 1598 1599 int java_lang_Thread::_holder_offset; 1600 int java_lang_Thread::_name_offset; 1601 int java_lang_Thread::_contextClassLoader_offset; 1602 int java_lang_Thread::_inheritedAccessControlContext_offset; 1603 int java_lang_Thread::_eetop_offset; 1604 int java_lang_Thread::_jvmti_thread_state_offset; 1605 int java_lang_Thread::_jvmti_VTMS_transition_disable_count_offset; 1606 int java_lang_Thread::_jvmti_is_in_VTMS_transition_offset; 1607 int java_lang_Thread::_interrupted_offset; 1608 int java_lang_Thread::_interruptLock_offset; 1609 int java_lang_Thread::_tid_offset; 1610 int java_lang_Thread::_continuation_offset; 1611 int java_lang_Thread::_park_blocker_offset; 1612 int java_lang_Thread::_scopedValueBindings_offset; 1613 JFR_ONLY(int java_lang_Thread::_jfr_epoch_offset;) 1614 1615 #define THREAD_FIELDS_DO(macro) \ 1616 macro(_holder_offset, k, "holder", thread_fieldholder_signature, false); \ 1617 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 1618 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \ 1619 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \ 1620 macro(_eetop_offset, k, "eetop", long_signature, false); \ 1621 macro(_interrupted_offset, k, "interrupted", bool_signature, false); \ 1622 macro(_interruptLock_offset, k, "interruptLock", object_signature, false); \ 1623 macro(_tid_offset, k, "tid", long_signature, false); \ 1624 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \ 1625 macro(_continuation_offset, k, "cont", continuation_signature, false); \ 1626 macro(_scopedValueBindings_offset, k, "scopedValueBindings", object_signature, false); 1627 1628 void java_lang_Thread::compute_offsets() { 1629 assert(_holder_offset == 0, "offsets should be initialized only once"); 1630 1631 InstanceKlass* k = vmClasses::Thread_klass(); 1632 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1633 THREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 1634 } 1635 1636 #if INCLUDE_CDS 1637 void java_lang_Thread::serialize_offsets(SerializeClosure* f) { 1638 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1639 THREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 1640 } 1641 #endif 1642 1643 JavaThread* java_lang_Thread::thread(oop java_thread) { 1644 return reinterpret_cast<JavaThread*>(java_thread->address_field(_eetop_offset)); 1645 } 1646 1647 JavaThread* java_lang_Thread::thread_acquire(oop java_thread) { 1648 return reinterpret_cast<JavaThread*>(java_thread->address_field_acquire(_eetop_offset)); 1649 } 1650 1651 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) { 1652 java_thread->address_field_put(_eetop_offset, (address)thread); 1653 } 1654 1655 void java_lang_Thread::release_set_thread(oop java_thread, JavaThread* thread) { 1656 java_thread->release_address_field_put(_eetop_offset, (address)thread); 1657 } 1658 1659 JvmtiThreadState* java_lang_Thread::jvmti_thread_state(oop java_thread) { 1660 return (JvmtiThreadState*)java_thread->address_field(_jvmti_thread_state_offset); 1661 } 1662 1663 void java_lang_Thread::set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state) { 1664 java_thread->address_field_put(_jvmti_thread_state_offset, (address)state); 1665 } 1666 1667 int java_lang_Thread::VTMS_transition_disable_count(oop java_thread) { 1668 return java_thread->int_field(_jvmti_VTMS_transition_disable_count_offset); 1669 } 1670 1671 void java_lang_Thread::inc_VTMS_transition_disable_count(oop java_thread) { 1672 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked"); 1673 int val = VTMS_transition_disable_count(java_thread); 1674 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val + 1); 1675 } 1676 1677 void java_lang_Thread::dec_VTMS_transition_disable_count(oop java_thread) { 1678 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked"); 1679 int val = VTMS_transition_disable_count(java_thread); 1680 assert(val > 0, "VTMS_transition_disable_count should never be negative"); 1681 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val - 1); 1682 } 1683 1684 bool java_lang_Thread::is_in_VTMS_transition(oop java_thread) { 1685 return java_thread->bool_field_volatile(_jvmti_is_in_VTMS_transition_offset); 1686 } 1687 1688 void java_lang_Thread::set_is_in_VTMS_transition(oop java_thread, bool val) { 1689 assert(is_in_VTMS_transition(java_thread) != val, "already %s transition", val ? "inside" : "outside"); 1690 java_thread->bool_field_put_volatile(_jvmti_is_in_VTMS_transition_offset, val); 1691 } 1692 1693 int java_lang_Thread::is_in_VTMS_transition_offset() { 1694 return _jvmti_is_in_VTMS_transition_offset; 1695 } 1696 1697 void java_lang_Thread::clear_scopedValueBindings(oop java_thread) { 1698 assert(java_thread != nullptr, "need a java_lang_Thread pointer here"); 1699 java_thread->obj_field_put(_scopedValueBindings_offset, nullptr); 1700 } 1701 1702 oop java_lang_Thread::holder(oop java_thread) { 1703 // Note: may return null if the thread is still attaching 1704 return java_thread->obj_field(_holder_offset); 1705 } 1706 oop java_lang_Thread::interrupt_lock(oop java_thread) { 1707 return java_thread->obj_field(_interruptLock_offset); 1708 } 1709 1710 bool java_lang_Thread::interrupted(oop java_thread) { 1711 // Make sure the caller can safely access oops. 1712 assert(Thread::current()->is_VM_thread() || 1713 (JavaThread::current()->thread_state() != _thread_blocked && 1714 JavaThread::current()->thread_state() != _thread_in_native), 1715 "Unsafe access to oop"); 1716 return java_thread->bool_field_volatile(_interrupted_offset); 1717 } 1718 1719 void java_lang_Thread::set_interrupted(oop java_thread, bool val) { 1720 // Make sure the caller can safely access oops. 1721 assert(Thread::current()->is_VM_thread() || 1722 (JavaThread::current()->thread_state() != _thread_blocked && 1723 JavaThread::current()->thread_state() != _thread_in_native), 1724 "Unsafe access to oop"); 1725 java_thread->bool_field_put_volatile(_interrupted_offset, val); 1726 } 1727 1728 1729 oop java_lang_Thread::name(oop java_thread) { 1730 return java_thread->obj_field(_name_offset); 1731 } 1732 1733 1734 void java_lang_Thread::set_name(oop java_thread, oop name) { 1735 java_thread->obj_field_put(_name_offset, name); 1736 } 1737 1738 // Convenience macros for setting and getting Thread fields that 1739 // are actually stored in the FieldHolder object of the thread. 1740 // The FieldHolder can be null whilst a thread is attaching via 1741 // JNI, and when the main thread is attaching. 1742 1743 // The default value should be the default/zero initialized value 1744 // of the field as it would be in java.lang.Thread.FieldHolder. 1745 #define GET_FIELDHOLDER_FIELD(java_thread, field, default_val) \ 1746 { \ 1747 oop holder = java_lang_Thread::holder(java_thread); \ 1748 if (holder != nullptr) \ 1749 return java_lang_Thread_FieldHolder::field(holder); \ 1750 else \ 1751 return default_val; \ 1752 } 1753 1754 // We should never be trying to set a field of an attaching thread. 1755 #define SET_FIELDHOLDER_FIELD(java_thread, field, value) \ 1756 { \ 1757 oop holder = java_lang_Thread::holder(java_thread); \ 1758 assert(holder != nullptr, "Thread not fully initialized"); \ 1759 java_lang_Thread_FieldHolder::set_##field(holder, value); \ 1760 } 1761 1762 1763 ThreadPriority java_lang_Thread::priority(oop java_thread) { 1764 GET_FIELDHOLDER_FIELD(java_thread, priority, (ThreadPriority)0); 1765 } 1766 1767 1768 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) { 1769 SET_FIELDHOLDER_FIELD(java_thread, priority, priority) 1770 } 1771 1772 1773 oop java_lang_Thread::threadGroup(oop java_thread) { 1774 GET_FIELDHOLDER_FIELD(java_thread, threadGroup, nullptr); 1775 } 1776 1777 1778 bool java_lang_Thread::is_alive(oop java_thread) { 1779 JavaThread* thr = java_lang_Thread::thread(java_thread); 1780 return (thr != nullptr); 1781 } 1782 1783 1784 bool java_lang_Thread::is_daemon(oop java_thread) { 1785 GET_FIELDHOLDER_FIELD(java_thread, is_daemon, false); 1786 } 1787 1788 1789 void java_lang_Thread::set_daemon(oop java_thread) { 1790 SET_FIELDHOLDER_FIELD(java_thread, daemon, true); 1791 } 1792 1793 oop java_lang_Thread::context_class_loader(oop java_thread) { 1794 return java_thread->obj_field(_contextClassLoader_offset); 1795 } 1796 1797 oop java_lang_Thread::inherited_access_control_context(oop java_thread) { 1798 return java_thread->obj_field(_inheritedAccessControlContext_offset); 1799 } 1800 1801 1802 jlong java_lang_Thread::stackSize(oop java_thread) { 1803 GET_FIELDHOLDER_FIELD(java_thread, stackSize, 0); 1804 } 1805 1806 // Write the thread status value to threadStatus field in java.lang.Thread java class. 1807 void java_lang_Thread::set_thread_status(oop java_thread, JavaThreadStatus status) { 1808 SET_FIELDHOLDER_FIELD(java_thread, thread_status, status); 1809 } 1810 1811 // Read thread status value from threadStatus field in java.lang.Thread java class. 1812 JavaThreadStatus java_lang_Thread::get_thread_status(oop java_thread) { 1813 // Make sure the caller is operating on behalf of the VM or is 1814 // running VM code (state == _thread_in_vm). 1815 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() || 1816 JavaThread::current()->thread_state() == _thread_in_vm, 1817 "Java Thread is not running in vm"); 1818 GET_FIELDHOLDER_FIELD(java_thread, get_thread_status, JavaThreadStatus::NEW /* not initialized */); 1819 } 1820 1821 ByteSize java_lang_Thread::thread_id_offset() { 1822 return in_ByteSize(_tid_offset); 1823 } 1824 1825 oop java_lang_Thread::park_blocker(oop java_thread) { 1826 return java_thread->obj_field(_park_blocker_offset); 1827 } 1828 1829 oop java_lang_Thread::async_get_stack_trace(oop java_thread, TRAPS) { 1830 ThreadsListHandle tlh(JavaThread::current()); 1831 JavaThread* thread; 1832 bool is_virtual = java_lang_VirtualThread::is_instance(java_thread); 1833 if (is_virtual) { 1834 oop carrier_thread = java_lang_VirtualThread::carrier_thread(java_thread); 1835 if (carrier_thread == nullptr) { 1836 return nullptr; 1837 } 1838 thread = java_lang_Thread::thread(carrier_thread); 1839 } else { 1840 thread = java_lang_Thread::thread(java_thread); 1841 } 1842 if (thread == nullptr) { 1843 return nullptr; 1844 } 1845 1846 class GetStackTraceClosure : public HandshakeClosure { 1847 public: 1848 const Handle _java_thread; 1849 int _depth; 1850 bool _retry_handshake; 1851 GrowableArray<Method*>* _methods; 1852 GrowableArray<int>* _bcis; 1853 1854 GetStackTraceClosure(Handle java_thread) : 1855 HandshakeClosure("GetStackTraceClosure"), _java_thread(java_thread), _depth(0), _retry_handshake(false), 1856 _methods(nullptr), _bcis(nullptr) { 1857 } 1858 ~GetStackTraceClosure() { 1859 delete _methods; 1860 delete _bcis; 1861 } 1862 1863 bool read_reset_retry() { 1864 bool ret = _retry_handshake; 1865 // If we re-execute the handshake this method need to return false 1866 // when the handshake cannot be performed. (E.g. thread terminating) 1867 _retry_handshake = false; 1868 return ret; 1869 } 1870 1871 void do_thread(Thread* th) { 1872 if (!Thread::current()->is_Java_thread()) { 1873 _retry_handshake = true; 1874 return; 1875 } 1876 1877 JavaThread* thread = JavaThread::cast(th); 1878 1879 if (!thread->has_last_Java_frame()) { 1880 return; 1881 } 1882 1883 bool carrier = false; 1884 if (java_lang_VirtualThread::is_instance(_java_thread())) { 1885 // if (thread->vthread() != _java_thread()) // We might be inside a System.executeOnCarrierThread 1886 const ContinuationEntry* ce = thread->vthread_continuation(); 1887 if (ce == nullptr || ce->cont_oop(thread) != java_lang_VirtualThread::continuation(_java_thread())) { 1888 return; // not mounted 1889 } 1890 } else { 1891 carrier = (thread->vthread_continuation() != nullptr); 1892 } 1893 1894 const int max_depth = MaxJavaStackTraceDepth; 1895 const bool skip_hidden = !ShowHiddenFrames; 1896 1897 // Pick minimum length that will cover most cases 1898 int init_length = 64; 1899 _methods = new (mtInternal) GrowableArray<Method*>(init_length, mtInternal); 1900 _bcis = new (mtInternal) GrowableArray<int>(init_length, mtInternal); 1901 1902 int total_count = 0; 1903 for (vframeStream vfst(thread, false, false, carrier); // we don't process frames as we don't care about oops 1904 !vfst.at_end() && (max_depth == 0 || max_depth != total_count); 1905 vfst.next()) { 1906 1907 if (skip_hidden && (vfst.method()->is_hidden() || 1908 vfst.method()->is_continuation_enter_intrinsic())) { 1909 continue; 1910 } 1911 1912 _methods->push(vfst.method()); 1913 _bcis->push(vfst.bci()); 1914 total_count++; 1915 } 1916 1917 _depth = total_count; 1918 } 1919 }; 1920 1921 // Handshake with target 1922 ResourceMark rm(THREAD); 1923 HandleMark hm(THREAD); 1924 GetStackTraceClosure gstc(Handle(THREAD, java_thread)); 1925 do { 1926 Handshake::execute(&gstc, &tlh, thread); 1927 } while (gstc.read_reset_retry()); 1928 1929 // Stop if no stack trace is found. 1930 if (gstc._depth == 0) { 1931 return nullptr; 1932 } 1933 1934 // Convert to StackTraceElement array 1935 InstanceKlass* k = vmClasses::StackTraceElement_klass(); 1936 assert(k != nullptr, "must be loaded in 1.4+"); 1937 if (k->should_be_initialized()) { 1938 k->initialize(CHECK_NULL); 1939 } 1940 objArrayHandle trace = oopFactory::new_objArray_handle(k, gstc._depth, CHECK_NULL); 1941 1942 for (int i = 0; i < gstc._depth; i++) { 1943 methodHandle method(THREAD, gstc._methods->at(i)); 1944 oop element = java_lang_StackTraceElement::create(method, 1945 gstc._bcis->at(i), 1946 CHECK_NULL); 1947 trace->obj_at_put(i, element); 1948 } 1949 1950 return trace(); 1951 } 1952 1953 const char* java_lang_Thread::thread_status_name(oop java_thread) { 1954 JavaThreadStatus status = get_thread_status(java_thread); 1955 switch (status) { 1956 case JavaThreadStatus::NEW : return "NEW"; 1957 case JavaThreadStatus::RUNNABLE : return "RUNNABLE"; 1958 case JavaThreadStatus::SLEEPING : return "TIMED_WAITING (sleeping)"; 1959 case JavaThreadStatus::IN_OBJECT_WAIT : return "WAITING (on object monitor)"; 1960 case JavaThreadStatus::IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)"; 1961 case JavaThreadStatus::PARKED : return "WAITING (parking)"; 1962 case JavaThreadStatus::PARKED_TIMED : return "TIMED_WAITING (parking)"; 1963 case JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)"; 1964 case JavaThreadStatus::TERMINATED : return "TERMINATED"; 1965 default : return "UNKNOWN"; 1966 }; 1967 } 1968 int java_lang_ThreadGroup::_parent_offset; 1969 int java_lang_ThreadGroup::_name_offset; 1970 int java_lang_ThreadGroup::_maxPriority_offset; 1971 int java_lang_ThreadGroup::_daemon_offset; 1972 1973 oop java_lang_ThreadGroup::parent(oop java_thread_group) { 1974 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1975 return java_thread_group->obj_field(_parent_offset); 1976 } 1977 1978 // ("name as oop" accessor is not necessary) 1979 1980 const char* java_lang_ThreadGroup::name(oop java_thread_group) { 1981 oop name = java_thread_group->obj_field(_name_offset); 1982 // ThreadGroup.name can be null 1983 if (name != nullptr) { 1984 return java_lang_String::as_utf8_string(name); 1985 } 1986 return nullptr; 1987 } 1988 1989 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) { 1990 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1991 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset); 1992 } 1993 1994 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) { 1995 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1996 return java_thread_group->bool_field(_daemon_offset) != 0; 1997 } 1998 1999 #define THREADGROUP_FIELDS_DO(macro) \ 2000 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \ 2001 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 2002 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \ 2003 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); 2004 2005 void java_lang_ThreadGroup::compute_offsets() { 2006 assert(_parent_offset == 0, "offsets should be initialized only once"); 2007 2008 InstanceKlass* k = vmClasses::ThreadGroup_klass(); 2009 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2010 } 2011 2012 #if INCLUDE_CDS 2013 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) { 2014 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2015 } 2016 #endif 2017 2018 2019 // java_lang_VirtualThread 2020 2021 int java_lang_VirtualThread::static_vthread_scope_offset; 2022 int java_lang_VirtualThread::_carrierThread_offset; 2023 int java_lang_VirtualThread::_continuation_offset; 2024 int java_lang_VirtualThread::_state_offset; 2025 int java_lang_VirtualThread::_next_offset; 2026 int java_lang_VirtualThread::_onWaitingList_offset; 2027 int java_lang_VirtualThread::_notified_offset; 2028 int java_lang_VirtualThread::_waitTimeout_offset; 2029 2030 #define VTHREAD_FIELDS_DO(macro) \ 2031 macro(static_vthread_scope_offset, k, "VTHREAD_SCOPE", continuationscope_signature, true); \ 2032 macro(_carrierThread_offset, k, "carrierThread", thread_signature, false); \ 2033 macro(_continuation_offset, k, "cont", continuation_signature, false); \ 2034 macro(_state_offset, k, "state", int_signature, false); \ 2035 macro(_next_offset, k, "next", vthread_signature, false); \ 2036 macro(_onWaitingList_offset, k, "onWaitingList", bool_signature, false); \ 2037 macro(_notified_offset, k, "notified", bool_signature, false); \ 2038 macro(_waitTimeout_offset, k, "waitTimeout", long_signature, false); 2039 2040 2041 void java_lang_VirtualThread::compute_offsets() { 2042 InstanceKlass* k = vmClasses::VirtualThread_klass(); 2043 VTHREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2044 } 2045 2046 bool java_lang_VirtualThread::is_instance(oop obj) { 2047 return obj != nullptr && is_subclass(obj->klass()); 2048 } 2049 2050 oop java_lang_VirtualThread::carrier_thread(oop vthread) { 2051 oop thread = vthread->obj_field(_carrierThread_offset); 2052 return thread; 2053 } 2054 2055 oop java_lang_VirtualThread::continuation(oop vthread) { 2056 oop cont = vthread->obj_field(_continuation_offset); 2057 return cont; 2058 } 2059 2060 int java_lang_VirtualThread::state(oop vthread) { 2061 return vthread->int_field_acquire(_state_offset); 2062 } 2063 2064 void java_lang_VirtualThread::set_state(oop vthread, int state) { 2065 vthread->release_int_field_put(_state_offset, state); 2066 } 2067 2068 int java_lang_VirtualThread::cmpxchg_state(oop vthread, int old_state, int new_state) { 2069 jint* addr = vthread->field_addr<jint>(_state_offset); 2070 int res = Atomic::cmpxchg(addr, old_state, new_state); 2071 return res; 2072 } 2073 2074 oop java_lang_VirtualThread::next(oop vthread) { 2075 return vthread->obj_field(_next_offset); 2076 } 2077 2078 void java_lang_VirtualThread::set_next(oop vthread, oop next_vthread) { 2079 vthread->obj_field_put(_next_offset, next_vthread); 2080 } 2081 2082 // Add vthread to the waiting list if it's not already in it. Multiple threads 2083 // could be trying to add vthread to the list at the same time, so we control 2084 // access with a cmpxchg on onWaitingList. The winner adds vthread to the list. 2085 // Method returns true if we added vthread to the list, false otherwise. 2086 bool java_lang_VirtualThread::set_onWaitingList(oop vthread, OopHandle& list_head) { 2087 jboolean* addr = vthread->field_addr<jboolean>(_onWaitingList_offset); 2088 jboolean vthread_on_list = Atomic::load(addr); 2089 if (!vthread_on_list) { 2090 vthread_on_list = Atomic::cmpxchg(addr, (jboolean)JNI_FALSE, (jboolean)JNI_TRUE); 2091 if (!vthread_on_list) { 2092 for (;;) { 2093 oop head = list_head.resolve(); 2094 java_lang_VirtualThread::set_next(vthread, head); 2095 if (list_head.cmpxchg(head, vthread) == head) return true; 2096 } 2097 } 2098 } 2099 return false; // already on waiting list 2100 } 2101 2102 void java_lang_VirtualThread::set_notified(oop vthread, jboolean value) { 2103 vthread->bool_field_put_volatile(_notified_offset, value); 2104 } 2105 2106 jlong java_lang_VirtualThread::waitTimeout(oop vthread) { 2107 return vthread->long_field(_waitTimeout_offset); 2108 } 2109 2110 void java_lang_VirtualThread::set_waitTimeout(oop vthread, jlong value) { 2111 vthread->long_field_put(_waitTimeout_offset, value); 2112 } 2113 2114 JavaThreadStatus java_lang_VirtualThread::map_state_to_thread_status(int state) { 2115 JavaThreadStatus status = JavaThreadStatus::NEW; 2116 switch (state & ~SUSPENDED) { 2117 case NEW: 2118 status = JavaThreadStatus::NEW; 2119 break; 2120 case STARTED: 2121 case RUNNING: 2122 case PARKING: 2123 case TIMED_PARKING: 2124 case UNPARKED: 2125 case YIELDING: 2126 case YIELDED: 2127 case UNBLOCKED: 2128 case WAITING: 2129 case TIMED_WAITING: 2130 status = JavaThreadStatus::RUNNABLE; 2131 break; 2132 case PARKED: 2133 case PINNED: 2134 status = JavaThreadStatus::PARKED; 2135 break; 2136 case TIMED_PARKED: 2137 case TIMED_PINNED: 2138 status = JavaThreadStatus::PARKED_TIMED; 2139 break; 2140 case BLOCKING: 2141 case BLOCKED: 2142 status = JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER; 2143 break; 2144 case WAIT: 2145 status = JavaThreadStatus::IN_OBJECT_WAIT; 2146 break; 2147 case TIMED_WAIT: 2148 status = JavaThreadStatus::IN_OBJECT_WAIT_TIMED; 2149 break; 2150 case TERMINATED: 2151 status = JavaThreadStatus::TERMINATED; 2152 break; 2153 default: 2154 ShouldNotReachHere(); 2155 } 2156 return status; 2157 } 2158 2159 bool java_lang_VirtualThread::is_preempted(oop vthread) { 2160 oop continuation = java_lang_VirtualThread::continuation(vthread); 2161 assert(continuation != nullptr, "vthread with no continuation"); 2162 stackChunkOop chunk = jdk_internal_vm_Continuation::tail(continuation); 2163 return chunk != nullptr && chunk->preempted(); 2164 } 2165 2166 #if INCLUDE_CDS 2167 void java_lang_VirtualThread::serialize_offsets(SerializeClosure* f) { 2168 VTHREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2169 } 2170 #endif 2171 2172 // java_lang_Throwable 2173 2174 int java_lang_Throwable::_backtrace_offset; 2175 int java_lang_Throwable::_detailMessage_offset; 2176 int java_lang_Throwable::_stackTrace_offset; 2177 int java_lang_Throwable::_depth_offset; 2178 int java_lang_Throwable::_cause_offset; 2179 int java_lang_Throwable::_static_unassigned_stacktrace_offset; 2180 2181 #define THROWABLE_FIELDS_DO(macro) \ 2182 macro(_backtrace_offset, k, "backtrace", object_signature, false); \ 2183 macro(_detailMessage_offset, k, "detailMessage", string_signature, false); \ 2184 macro(_stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \ 2185 macro(_depth_offset, k, "depth", int_signature, false); \ 2186 macro(_cause_offset, k, "cause", throwable_signature, false); \ 2187 macro(_static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true) 2188 2189 void java_lang_Throwable::compute_offsets() { 2190 InstanceKlass* k = vmClasses::Throwable_klass(); 2191 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2192 } 2193 2194 #if INCLUDE_CDS 2195 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) { 2196 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2197 } 2198 #endif 2199 2200 oop java_lang_Throwable::unassigned_stacktrace() { 2201 InstanceKlass* ik = vmClasses::Throwable_klass(); 2202 oop base = ik->static_field_base_raw(); 2203 return base->obj_field(_static_unassigned_stacktrace_offset); 2204 } 2205 2206 oop java_lang_Throwable::backtrace(oop throwable) { 2207 return throwable->obj_field_acquire(_backtrace_offset); 2208 } 2209 2210 2211 void java_lang_Throwable::set_backtrace(oop throwable, oop value) { 2212 throwable->release_obj_field_put(_backtrace_offset, value); 2213 } 2214 2215 int java_lang_Throwable::depth(oop throwable) { 2216 return throwable->int_field(_depth_offset); 2217 } 2218 2219 void java_lang_Throwable::set_depth(oop throwable, int value) { 2220 throwable->int_field_put(_depth_offset, value); 2221 } 2222 2223 oop java_lang_Throwable::message(oop throwable) { 2224 return throwable->obj_field(_detailMessage_offset); 2225 } 2226 2227 const char* java_lang_Throwable::message_as_utf8(oop throwable) { 2228 oop msg = java_lang_Throwable::message(throwable); 2229 const char* msg_utf8 = nullptr; 2230 if (msg != nullptr) { 2231 msg_utf8 = java_lang_String::as_utf8_string(msg); 2232 } 2233 return msg_utf8; 2234 } 2235 2236 oop java_lang_Throwable::cause(oop throwable) { 2237 return throwable->obj_field(_cause_offset); 2238 } 2239 2240 void java_lang_Throwable::set_message(oop throwable, oop value) { 2241 throwable->obj_field_put(_detailMessage_offset, value); 2242 } 2243 2244 2245 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) { 2246 throwable->obj_field_put(_stackTrace_offset, st_element_array); 2247 } 2248 2249 void java_lang_Throwable::clear_stacktrace(oop throwable) { 2250 set_stacktrace(throwable, nullptr); 2251 } 2252 2253 2254 void java_lang_Throwable::print(oop throwable, outputStream* st) { 2255 ResourceMark rm; 2256 Klass* k = throwable->klass(); 2257 assert(k != nullptr, "just checking"); 2258 st->print("%s", k->external_name()); 2259 oop msg = message(throwable); 2260 if (msg != nullptr) { 2261 st->print(": %s", java_lang_String::as_utf8_string(msg)); 2262 } 2263 } 2264 2265 // After this many redefines, the stack trace is unreliable. 2266 const int MAX_VERSION = USHRT_MAX; 2267 2268 static inline bool version_matches(Method* method, int version) { 2269 assert(version < MAX_VERSION, "version is too big"); 2270 return method != nullptr && (method->constants()->version() == version); 2271 } 2272 2273 // This class provides a simple wrapper over the internal structure of 2274 // exception backtrace to insulate users of the backtrace from needing 2275 // to know what it looks like. 2276 // The code of this class is not GC safe. Allocations can only happen 2277 // in expand(). 2278 class BacktraceBuilder: public StackObj { 2279 friend class BacktraceIterator; 2280 private: 2281 Handle _backtrace; 2282 objArrayOop _head; 2283 typeArrayOop _methods; 2284 typeArrayOop _bcis; 2285 objArrayOop _mirrors; 2286 typeArrayOop _names; // Needed to insulate method name against redefinition. 2287 // True if the top frame of the backtrace is omitted because it shall be hidden. 2288 bool _has_hidden_top_frame; 2289 int _index; 2290 NoSafepointVerifier _nsv; 2291 2292 enum { 2293 trace_methods_offset = java_lang_Throwable::trace_methods_offset, 2294 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset, 2295 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset, 2296 trace_names_offset = java_lang_Throwable::trace_names_offset, 2297 trace_conts_offset = java_lang_Throwable::trace_conts_offset, 2298 trace_next_offset = java_lang_Throwable::trace_next_offset, 2299 trace_hidden_offset = java_lang_Throwable::trace_hidden_offset, 2300 trace_size = java_lang_Throwable::trace_size, 2301 trace_chunk_size = java_lang_Throwable::trace_chunk_size 2302 }; 2303 2304 // get info out of chunks 2305 static typeArrayOop get_methods(objArrayHandle chunk) { 2306 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset)); 2307 assert(methods != nullptr, "method array should be initialized in backtrace"); 2308 return methods; 2309 } 2310 static typeArrayOop get_bcis(objArrayHandle chunk) { 2311 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 2312 assert(bcis != nullptr, "bci array should be initialized in backtrace"); 2313 return bcis; 2314 } 2315 static objArrayOop get_mirrors(objArrayHandle chunk) { 2316 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset)); 2317 assert(mirrors != nullptr, "mirror array should be initialized in backtrace"); 2318 return mirrors; 2319 } 2320 static typeArrayOop get_names(objArrayHandle chunk) { 2321 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset)); 2322 assert(names != nullptr, "names array should be initialized in backtrace"); 2323 return names; 2324 } 2325 static bool has_hidden_top_frame(objArrayHandle chunk) { 2326 oop hidden = chunk->obj_at(trace_hidden_offset); 2327 return hidden != nullptr; 2328 } 2329 2330 public: 2331 2332 // constructor for new backtrace 2333 BacktraceBuilder(TRAPS): _head(nullptr), _methods(nullptr), _bcis(nullptr), _mirrors(nullptr), _names(nullptr), _has_hidden_top_frame(false) { 2334 expand(CHECK); 2335 _backtrace = Handle(THREAD, _head); 2336 _index = 0; 2337 } 2338 2339 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) { 2340 _methods = get_methods(backtrace); 2341 _bcis = get_bcis(backtrace); 2342 _mirrors = get_mirrors(backtrace); 2343 _names = get_names(backtrace); 2344 _has_hidden_top_frame = has_hidden_top_frame(backtrace); 2345 assert(_methods->length() == _bcis->length() && 2346 _methods->length() == _mirrors->length() && 2347 _mirrors->length() == _names->length(), 2348 "method and source information arrays should match"); 2349 2350 // head is the preallocated backtrace 2351 _head = backtrace(); 2352 _backtrace = Handle(thread, _head); 2353 _index = 0; 2354 } 2355 2356 void expand(TRAPS) { 2357 objArrayHandle old_head(THREAD, _head); 2358 PauseNoSafepointVerifier pnsv(&_nsv); 2359 2360 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK); 2361 objArrayHandle new_head(THREAD, head); 2362 2363 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK); 2364 typeArrayHandle new_methods(THREAD, methods); 2365 2366 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK); 2367 typeArrayHandle new_bcis(THREAD, bcis); 2368 2369 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK); 2370 objArrayHandle new_mirrors(THREAD, mirrors); 2371 2372 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK); 2373 typeArrayHandle new_names(THREAD, names); 2374 2375 if (!old_head.is_null()) { 2376 old_head->obj_at_put(trace_next_offset, new_head()); 2377 } 2378 new_head->obj_at_put(trace_methods_offset, new_methods()); 2379 new_head->obj_at_put(trace_bcis_offset, new_bcis()); 2380 new_head->obj_at_put(trace_mirrors_offset, new_mirrors()); 2381 new_head->obj_at_put(trace_names_offset, new_names()); 2382 new_head->obj_at_put(trace_hidden_offset, nullptr); 2383 2384 _head = new_head(); 2385 _methods = new_methods(); 2386 _bcis = new_bcis(); 2387 _mirrors = new_mirrors(); 2388 _names = new_names(); 2389 _index = 0; 2390 } 2391 2392 oop backtrace() { 2393 return _backtrace(); 2394 } 2395 2396 inline void push(Method* method, int bci, TRAPS) { 2397 // Smear the -1 bci to 0 since the array only holds unsigned 2398 // shorts. The later line number lookup would just smear the -1 2399 // to a 0 even if it could be recorded. 2400 if (bci == SynchronizationEntryBCI) bci = 0; 2401 2402 if (_index >= trace_chunk_size) { 2403 methodHandle mhandle(THREAD, method); 2404 expand(CHECK); 2405 method = mhandle(); 2406 } 2407 2408 _methods->ushort_at_put(_index, method->orig_method_idnum()); 2409 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version())); 2410 2411 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the 2412 // klass owning the symbols alive so their refcounts aren't decremented. 2413 Symbol* name = method->name(); 2414 _names->symbol_at_put(_index, name); 2415 2416 // We need to save the mirrors in the backtrace to keep the class 2417 // from being unloaded while we still have this stack trace. 2418 assert(method->method_holder()->java_mirror() != nullptr, "never push null for mirror"); 2419 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror()); 2420 2421 _index++; 2422 } 2423 2424 void set_has_hidden_top_frame() { 2425 if (!_has_hidden_top_frame) { 2426 // It would be nice to add java/lang/Boolean::TRUE here 2427 // to indicate that this backtrace has a hidden top frame. 2428 // But this code is used before TRUE is allocated. 2429 // Therefore let's just use an arbitrary legal oop 2430 // available right here. _methods is a short[]. 2431 assert(_methods != nullptr, "we need a legal oop"); 2432 _has_hidden_top_frame = true; 2433 _head->obj_at_put(trace_hidden_offset, _methods); 2434 } 2435 } 2436 }; 2437 2438 struct BacktraceElement : public StackObj { 2439 int _method_id; 2440 int _bci; 2441 int _version; 2442 Symbol* _name; 2443 Handle _mirror; 2444 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) : 2445 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {} 2446 }; 2447 2448 class BacktraceIterator : public StackObj { 2449 int _index; 2450 objArrayHandle _result; 2451 objArrayHandle _mirrors; 2452 typeArrayHandle _methods; 2453 typeArrayHandle _bcis; 2454 typeArrayHandle _names; 2455 2456 void init(objArrayHandle result, Thread* thread) { 2457 // Get method id, bci, version and mirror from chunk 2458 _result = result; 2459 if (_result.not_null()) { 2460 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result)); 2461 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result)); 2462 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result)); 2463 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result)); 2464 _index = 0; 2465 } 2466 } 2467 public: 2468 BacktraceIterator(objArrayHandle result, Thread* thread) { 2469 init(result, thread); 2470 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match"); 2471 } 2472 2473 BacktraceElement next(Thread* thread) { 2474 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)), 2475 _methods->ushort_at(_index), 2476 Backtrace::version_at(_bcis->int_at(_index)), 2477 Backtrace::bci_at(_bcis->int_at(_index)), 2478 _names->symbol_at(_index)); 2479 _index++; 2480 2481 if (_index >= java_lang_Throwable::trace_chunk_size) { 2482 int next_offset = java_lang_Throwable::trace_next_offset; 2483 // Get next chunk 2484 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset))); 2485 init(result, thread); 2486 } 2487 return e; 2488 } 2489 2490 bool repeat() { 2491 return _result.not_null() && _mirrors->obj_at(_index) != nullptr; 2492 } 2493 }; 2494 2495 2496 // Print stack trace element to resource allocated buffer 2497 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id, 2498 int version, int bci, Symbol* name) { 2499 ResourceMark rm; 2500 2501 // Get strings and string lengths 2502 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 2503 const char* klass_name = holder->external_name(); 2504 int buf_len = (int)strlen(klass_name); 2505 2506 char* method_name = name->as_C_string(); 2507 buf_len += (int)strlen(method_name); 2508 2509 char* source_file_name = nullptr; 2510 Symbol* source = Backtrace::get_source_file_name(holder, version); 2511 if (source != nullptr) { 2512 source_file_name = source->as_C_string(); 2513 buf_len += (int)strlen(source_file_name); 2514 } 2515 2516 char *module_name = nullptr, *module_version = nullptr; 2517 ModuleEntry* module = holder->module(); 2518 if (module->is_named()) { 2519 module_name = module->name()->as_C_string(); 2520 buf_len += (int)strlen(module_name); 2521 if (module->version() != nullptr) { 2522 module_version = module->version()->as_C_string(); 2523 buf_len += (int)strlen(module_version); 2524 } 2525 } 2526 2527 // Allocate temporary buffer with extra space for formatting and line number 2528 const size_t buf_size = buf_len + 64; 2529 char* buf = NEW_RESOURCE_ARRAY(char, buf_size); 2530 2531 // Print stack trace line in buffer 2532 size_t buf_off = os::snprintf_checked(buf, buf_size, "\tat %s.%s(", klass_name, method_name); 2533 2534 // Print module information 2535 if (module_name != nullptr) { 2536 if (module_version != nullptr) { 2537 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s@%s/", module_name, module_version); 2538 } else { 2539 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s/", module_name); 2540 } 2541 } 2542 2543 // The method can be null if the requested class version is gone 2544 Method* method = holder->method_with_orig_idnum(method_id, version); 2545 if (!version_matches(method, version)) { 2546 strcat(buf, "Redefined)"); 2547 } else { 2548 int line_number = Backtrace::get_line_number(method, bci); 2549 if (line_number == -2) { 2550 strcat(buf, "Native Method)"); 2551 } else { 2552 if (source_file_name != nullptr && (line_number != -1)) { 2553 // Sourcename and linenumber 2554 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s:%d)", source_file_name, line_number); 2555 } else if (source_file_name != nullptr) { 2556 // Just sourcename 2557 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s)", source_file_name); 2558 } else { 2559 // Neither sourcename nor linenumber 2560 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "Unknown Source)"); 2561 } 2562 nmethod* nm = method->code(); 2563 if (WizardMode && nm != nullptr) { 2564 os::snprintf_checked(buf + buf_off, buf_size - buf_off, "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm); 2565 } 2566 } 2567 } 2568 2569 st->print_cr("%s", buf); 2570 } 2571 2572 void java_lang_Throwable::print_stack_element(outputStream *st, Method* method, int bci) { 2573 Handle mirror (Thread::current(), method->method_holder()->java_mirror()); 2574 int method_id = method->orig_method_idnum(); 2575 int version = method->constants()->version(); 2576 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name()); 2577 } 2578 2579 /** 2580 * Print the throwable message and its stack trace plus all causes by walking the 2581 * cause chain. The output looks the same as of Throwable.printStackTrace(). 2582 */ 2583 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) { 2584 // First, print the message. 2585 print(throwable(), st); 2586 st->cr(); 2587 2588 // Now print the stack trace. 2589 JavaThread* THREAD = JavaThread::current(); // For exception macros. 2590 while (throwable.not_null()) { 2591 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable()))); 2592 if (result.is_null()) { 2593 st->print_raw_cr("\t<<no stack trace available>>"); 2594 return; 2595 } 2596 BacktraceIterator iter(result, THREAD); 2597 2598 while (iter.repeat()) { 2599 BacktraceElement bte = iter.next(THREAD); 2600 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name); 2601 } 2602 if (THREAD->can_call_java()) { 2603 // Call getCause() which doesn't necessarily return the _cause field. 2604 ExceptionMark em(THREAD); 2605 JavaValue cause(T_OBJECT); 2606 JavaCalls::call_virtual(&cause, 2607 throwable, 2608 throwable->klass(), 2609 vmSymbols::getCause_name(), 2610 vmSymbols::void_throwable_signature(), 2611 THREAD); 2612 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 2613 if (HAS_PENDING_EXCEPTION) { 2614 CLEAR_PENDING_EXCEPTION; 2615 throwable = Handle(); 2616 } else { 2617 throwable = Handle(THREAD, cause.get_oop()); 2618 if (throwable.not_null()) { 2619 st->print("Caused by: "); 2620 print(throwable(), st); 2621 st->cr(); 2622 } 2623 } 2624 } else { 2625 st->print_raw_cr("<<cannot call Java to get cause>>"); 2626 return; 2627 } 2628 } 2629 } 2630 2631 /** 2632 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace(). 2633 */ 2634 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) { 2635 assert(throwable->is_a(vmClasses::Throwable_klass()), "Throwable instance expected"); 2636 JavaValue result(T_VOID); 2637 JavaCalls::call_virtual(&result, 2638 throwable, 2639 vmClasses::Throwable_klass(), 2640 vmSymbols::printStackTrace_name(), 2641 vmSymbols::void_method_signature(), 2642 THREAD); 2643 } 2644 2645 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) { 2646 if (!StackTraceInThrowable) return; 2647 ResourceMark rm(THREAD); 2648 2649 // Start out by clearing the backtrace for this object, in case the VM 2650 // runs out of memory while allocating the stack trace 2651 set_backtrace(throwable(), nullptr); 2652 // Clear lazily constructed Java level stacktrace if refilling occurs 2653 // This is unnecessary in 1.7+ but harmless 2654 clear_stacktrace(throwable()); 2655 2656 int max_depth = MaxJavaStackTraceDepth; 2657 JavaThread* thread = THREAD; 2658 2659 BacktraceBuilder bt(CHECK); 2660 2661 // If there is no Java frame just return the method that was being called 2662 // with bci 0 2663 if (!thread->has_last_Java_frame()) { 2664 if (max_depth >= 1 && method() != nullptr) { 2665 bt.push(method(), 0, CHECK); 2666 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1); 2667 set_depth(throwable(), 1); 2668 set_backtrace(throwable(), bt.backtrace()); 2669 } 2670 return; 2671 } 2672 2673 // Instead of using vframe directly, this version of fill_in_stack_trace 2674 // basically handles everything by hand. This significantly improved the 2675 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows. 2676 // See bug 6333838 for more details. 2677 // The "ASSERT" here is to verify this method generates the exactly same stack 2678 // trace as utilizing vframe. 2679 #ifdef ASSERT 2680 vframeStream st(thread, false /* stop_at_java_call_stub */, false /* process_frames */); 2681 #endif 2682 int total_count = 0; 2683 RegisterMap map(thread, 2684 RegisterMap::UpdateMap::skip, 2685 RegisterMap::ProcessFrames::skip, 2686 RegisterMap::WalkContinuation::include); 2687 int decode_offset = 0; 2688 nmethod* nm = nullptr; 2689 bool skip_fillInStackTrace_check = false; 2690 bool skip_throwableInit_check = false; 2691 bool skip_hidden = !ShowHiddenFrames; 2692 bool show_carrier = ShowCarrierFrames; 2693 ContinuationEntry* cont_entry = thread->last_continuation(); 2694 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) { 2695 Method* method = nullptr; 2696 int bci = 0; 2697 2698 // Compiled java method case. 2699 if (decode_offset != 0) { 2700 DebugInfoReadStream stream(nm, decode_offset); 2701 decode_offset = stream.read_int(); 2702 method = (Method*)nm->metadata_at(stream.read_int()); 2703 bci = stream.read_bci(); 2704 } else { 2705 if (fr.is_first_frame()) break; 2706 2707 if (Continuation::is_continuation_enterSpecial(fr)) { 2708 assert(cont_entry == Continuation::get_continuation_entry_for_entry_frame(thread, fr), ""); 2709 if (!show_carrier && cont_entry->is_virtual_thread()) { 2710 break; 2711 } 2712 cont_entry = cont_entry->parent(); 2713 } 2714 2715 address pc = fr.pc(); 2716 if (fr.is_interpreted_frame()) { 2717 address bcp; 2718 if (!map.in_cont()) { 2719 bcp = fr.interpreter_frame_bcp(); 2720 method = fr.interpreter_frame_method(); 2721 } else { 2722 bcp = map.stack_chunk()->interpreter_frame_bcp(fr); 2723 method = map.stack_chunk()->interpreter_frame_method(fr); 2724 } 2725 bci = method->bci_from(bcp); 2726 fr = fr.sender(&map); 2727 } else { 2728 CodeBlob* cb = fr.cb(); 2729 // HMMM QQQ might be nice to have frame return nm as null if cb is non-null 2730 // but non nmethod 2731 fr = fr.sender(&map); 2732 if (cb == nullptr || !cb->is_nmethod()) { 2733 continue; 2734 } 2735 nm = cb->as_nmethod(); 2736 assert(nm->method() != nullptr, "must be"); 2737 if (nm->method()->is_native()) { 2738 method = nm->method(); 2739 bci = 0; 2740 } else { 2741 PcDesc* pd = nm->pc_desc_at(pc); 2742 decode_offset = pd->scope_decode_offset(); 2743 // if decode_offset is not equal to 0, it will execute the 2744 // "compiled java method case" at the beginning of the loop. 2745 continue; 2746 } 2747 } 2748 } 2749 #ifdef ASSERT 2750 if (!st.at_end()) { // TODO LOOM remove once we show only vthread trace 2751 assert(st.method() == method && st.bci() == bci, "Wrong stack trace"); 2752 st.next(); 2753 } 2754 #endif 2755 2756 // the format of the stacktrace will be: 2757 // - 1 or more fillInStackTrace frames for the exception class (skipped) 2758 // - 0 or more <init> methods for the exception class (skipped) 2759 // - rest of the stack 2760 2761 if (!skip_fillInStackTrace_check) { 2762 if (method->name() == vmSymbols::fillInStackTrace_name() && 2763 throwable->is_a(method->method_holder())) { 2764 continue; 2765 } 2766 else { 2767 skip_fillInStackTrace_check = true; // gone past them all 2768 } 2769 } 2770 if (!skip_throwableInit_check) { 2771 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering"); 2772 2773 // skip <init> methods of the exception class and superclasses 2774 // This is similar to classic VM. 2775 if (method->name() == vmSymbols::object_initializer_name() && 2776 throwable->is_a(method->method_holder())) { 2777 continue; 2778 } else { 2779 // there are none or we've seen them all - either way stop checking 2780 skip_throwableInit_check = true; 2781 } 2782 } 2783 if (method->is_hidden() || method->is_continuation_enter_intrinsic()) { 2784 if (skip_hidden) { 2785 if (total_count == 0) { 2786 // The top frame will be hidden from the stack trace. 2787 bt.set_has_hidden_top_frame(); 2788 } 2789 continue; 2790 } 2791 } 2792 2793 bt.push(method, bci, CHECK); 2794 total_count++; 2795 } 2796 2797 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count); 2798 2799 // Put completed stack trace into throwable object 2800 set_backtrace(throwable(), bt.backtrace()); 2801 set_depth(throwable(), total_count); 2802 } 2803 2804 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) { 2805 // No-op if stack trace is disabled 2806 if (!StackTraceInThrowable) { 2807 return; 2808 } 2809 2810 // Disable stack traces for some preallocated out of memory errors 2811 if (!Universe::should_fill_in_stack_trace(throwable)) { 2812 return; 2813 } 2814 2815 JavaThread* THREAD = JavaThread::current(); // For exception macros. 2816 PreserveExceptionMark pm(THREAD); 2817 2818 fill_in_stack_trace(throwable, method, THREAD); 2819 // Ignore exceptions thrown during stack trace filling (OOM) and reinstall the 2820 // original exception via the PreserveExceptionMark destructor. 2821 CLEAR_PENDING_EXCEPTION; 2822 } 2823 2824 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 2825 // Allocate stack trace - backtrace is created but not filled in 2826 2827 // No-op if stack trace is disabled 2828 if (!StackTraceInThrowable) return; 2829 BacktraceBuilder bt(CHECK); // creates a backtrace 2830 set_backtrace(throwable(), bt.backtrace()); 2831 } 2832 2833 2834 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 2835 // Fill in stack trace into preallocated backtrace (no GC) 2836 2837 // No-op if stack trace is disabled 2838 if (!StackTraceInThrowable) return; 2839 2840 assert(throwable->is_a(vmClasses::Throwable_klass()), "sanity check"); 2841 2842 JavaThread* THREAD = JavaThread::current(); // For exception macros. 2843 2844 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable())); 2845 assert(backtrace.not_null(), "backtrace should have been preallocated"); 2846 2847 ResourceMark rm(THREAD); 2848 vframeStream st(THREAD, false /* stop_at_java_call_stub */, false /* process_frames */); 2849 2850 BacktraceBuilder bt(THREAD, backtrace); 2851 2852 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 2853 // methods as preallocated errors aren't created by "java" code. 2854 2855 // fill in as much stack trace as possible 2856 int chunk_count = 0; 2857 for (;!st.at_end(); st.next()) { 2858 bt.push(st.method(), st.bci(), CHECK); 2859 chunk_count++; 2860 2861 // Bail-out for deep stacks 2862 if (chunk_count >= trace_chunk_size) break; 2863 } 2864 set_depth(throwable(), chunk_count); 2865 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count); 2866 2867 // We support the Throwable immutability protocol defined for Java 7. 2868 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace()); 2869 assert(java_lang_Throwable::unassigned_stacktrace() != nullptr, "not initialized"); 2870 } 2871 2872 void java_lang_Throwable::get_stack_trace_elements(int depth, Handle backtrace, 2873 objArrayHandle stack_trace_array_h, TRAPS) { 2874 2875 if (backtrace.is_null() || stack_trace_array_h.is_null()) { 2876 THROW(vmSymbols::java_lang_NullPointerException()); 2877 } 2878 2879 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent"); 2880 2881 if (stack_trace_array_h->length() != depth) { 2882 THROW(vmSymbols::java_lang_IndexOutOfBoundsException()); 2883 } 2884 2885 objArrayHandle result(THREAD, objArrayOop(backtrace())); 2886 BacktraceIterator iter(result, THREAD); 2887 2888 int index = 0; 2889 while (iter.repeat()) { 2890 BacktraceElement bte = iter.next(THREAD); 2891 2892 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++)); 2893 2894 if (stack_trace_element.is_null()) { 2895 THROW(vmSymbols::java_lang_NullPointerException()); 2896 } 2897 2898 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror())); 2899 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version)); 2900 2901 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, 2902 method, 2903 bte._version, 2904 bte._bci, 2905 bte._name, 2906 CHECK); 2907 } 2908 } 2909 2910 Handle java_lang_Throwable::create_initialization_error(JavaThread* current, Handle throwable) { 2911 // Creates an ExceptionInInitializerError to be recorded as the initialization error when class initialization 2912 // failed due to the passed in 'throwable'. We cannot save 'throwable' directly due to issues with keeping alive 2913 // all objects referenced via its stacktrace. So instead we save a new EIIE instance, with the same message and 2914 // symbolic stacktrace of 'throwable'. 2915 assert(throwable.not_null(), "shouldn't be"); 2916 2917 // Now create the message from the original exception and thread name. 2918 ResourceMark rm(current); 2919 const char *message = nullptr; 2920 oop detailed_message = java_lang_Throwable::message(throwable()); 2921 if (detailed_message != nullptr) { 2922 message = java_lang_String::as_utf8_string(detailed_message); 2923 } 2924 stringStream st; 2925 st.print("Exception %s%s ", throwable()->klass()->name()->as_klass_external_name(), 2926 message == nullptr ? "" : ":"); 2927 if (message == nullptr) { 2928 st.print("[in thread \"%s\"]", current->name()); 2929 } else { 2930 st.print("%s [in thread \"%s\"]", message, current->name()); 2931 } 2932 2933 Symbol* exception_name = vmSymbols::java_lang_ExceptionInInitializerError(); 2934 Handle init_error = Exceptions::new_exception(current, exception_name, st.as_string()); 2935 // If new_exception returns a different exception while creating the exception, 2936 // abandon the attempt to save the initialization error and return null. 2937 if (init_error->klass()->name() != exception_name) { 2938 log_info(class, init)("Exception %s thrown while saving initialization exception", 2939 init_error->klass()->external_name()); 2940 return Handle(); 2941 } 2942 2943 // Call to java to fill in the stack trace and clear declaringClassObject to 2944 // not keep classes alive in the stack trace. 2945 // call this: public StackTraceElement[] getStackTrace() 2946 JavaValue result(T_ARRAY); 2947 JavaCalls::call_virtual(&result, throwable, 2948 vmClasses::Throwable_klass(), 2949 vmSymbols::getStackTrace_name(), 2950 vmSymbols::getStackTrace_signature(), 2951 current); 2952 if (!current->has_pending_exception()){ 2953 Handle stack_trace(current, result.get_oop()); 2954 assert(stack_trace->is_objArray(), "Should be an array"); 2955 java_lang_Throwable::set_stacktrace(init_error(), stack_trace()); 2956 // Clear backtrace because the stacktrace should be used instead. 2957 set_backtrace(init_error(), nullptr); 2958 } else { 2959 log_info(class, init)("Exception thrown while getting stack trace for initialization exception %s", 2960 init_error->klass()->external_name()); 2961 current->clear_pending_exception(); 2962 } 2963 2964 return init_error; 2965 } 2966 2967 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) { 2968 JavaThread* current = JavaThread::current(); 2969 objArrayHandle result(current, objArrayOop(backtrace(throwable))); 2970 BacktraceIterator iter(result, current); 2971 // No backtrace available. 2972 if (!iter.repeat()) return false; 2973 2974 // If the exception happened in a frame that has been hidden, i.e., 2975 // omitted from the back trace, we can not compute the message. 2976 oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset); 2977 if (hidden != nullptr) { 2978 return false; 2979 } 2980 2981 // Get first backtrace element. 2982 BacktraceElement bte = iter.next(current); 2983 2984 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror())); 2985 assert(holder != nullptr, "first element should be non-null"); 2986 Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version); 2987 2988 // Original version is no longer available. 2989 if (m == nullptr || !version_matches(m, bte._version)) { 2990 return false; 2991 } 2992 2993 *method = m; 2994 *bci = bte._bci; 2995 return true; 2996 } 2997 2998 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) { 2999 // Allocate java.lang.StackTraceElement instance 3000 InstanceKlass* k = vmClasses::StackTraceElement_klass(); 3001 assert(k != nullptr, "must be loaded in 1.4+"); 3002 if (k->should_be_initialized()) { 3003 k->initialize(CHECK_NULL); 3004 } 3005 3006 Handle element = k->allocate_instance_handle(CHECK_NULL); 3007 3008 int version = method->constants()->version(); 3009 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_NULL); 3010 return element(); 3011 } 3012 3013 void java_lang_StackTraceElement::fill_in(Handle element, 3014 InstanceKlass* holder, const methodHandle& method, 3015 int version, int bci, Symbol* name, TRAPS) { 3016 assert(element->is_a(vmClasses::StackTraceElement_klass()), "sanity check"); 3017 3018 ResourceMark rm(THREAD); 3019 HandleMark hm(THREAD); 3020 3021 // Fill in class name 3022 Handle java_class(THREAD, holder->java_mirror()); 3023 oop classname = java_lang_Class::name(java_class, CHECK); 3024 java_lang_StackTraceElement::set_declaringClass(element(), classname); 3025 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class()); 3026 3027 oop loader = holder->class_loader(); 3028 if (loader != nullptr) { 3029 oop loader_name = java_lang_ClassLoader::name(loader); 3030 if (loader_name != nullptr) 3031 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name); 3032 } 3033 3034 // Fill in method name 3035 oop methodname = StringTable::intern(name, CHECK); 3036 java_lang_StackTraceElement::set_methodName(element(), methodname); 3037 3038 // Fill in module name and version 3039 ModuleEntry* module = holder->module(); 3040 if (module->is_named()) { 3041 oop module_name = StringTable::intern(module->name(), CHECK); 3042 java_lang_StackTraceElement::set_moduleName(element(), module_name); 3043 oop module_version; 3044 if (module->version() != nullptr) { 3045 module_version = StringTable::intern(module->version(), CHECK); 3046 } else { 3047 module_version = nullptr; 3048 } 3049 java_lang_StackTraceElement::set_moduleVersion(element(), module_version); 3050 } 3051 3052 if (method() == nullptr || !version_matches(method(), version)) { 3053 // The method was redefined, accurate line number information isn't available 3054 java_lang_StackTraceElement::set_fileName(element(), nullptr); 3055 java_lang_StackTraceElement::set_lineNumber(element(), -1); 3056 } else { 3057 Symbol* source; 3058 oop source_file; 3059 int line_number; 3060 decode_file_and_line(java_class, holder, version, method, bci, source, source_file, line_number, CHECK); 3061 3062 java_lang_StackTraceElement::set_fileName(element(), source_file); 3063 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 3064 } 3065 } 3066 3067 void java_lang_StackTraceElement::decode_file_and_line(Handle java_class, 3068 InstanceKlass* holder, 3069 int version, 3070 const methodHandle& method, 3071 int bci, 3072 Symbol*& source, 3073 oop& source_file, 3074 int& line_number, TRAPS) { 3075 // Fill in source file name and line number. 3076 source = Backtrace::get_source_file_name(holder, version); 3077 source_file = java_lang_Class::source_file(java_class()); 3078 if (source != nullptr) { 3079 // Class was not redefined. We can trust its cache if set, 3080 // else we have to initialize it. 3081 if (source_file == nullptr) { 3082 source_file = StringTable::intern(source, CHECK); 3083 java_lang_Class::set_source_file(java_class(), source_file); 3084 } 3085 } else { 3086 // Class was redefined. Dump the cache if it was set. 3087 if (source_file != nullptr) { 3088 source_file = nullptr; 3089 java_lang_Class::set_source_file(java_class(), source_file); 3090 } 3091 } 3092 line_number = Backtrace::get_line_number(method(), bci); 3093 } 3094 3095 #if INCLUDE_JVMCI 3096 void java_lang_StackTraceElement::decode(const methodHandle& method, int bci, 3097 Symbol*& filename, int& line_number, TRAPS) { 3098 ResourceMark rm(THREAD); 3099 HandleMark hm(THREAD); 3100 3101 filename = nullptr; 3102 line_number = -1; 3103 3104 oop source_file; 3105 int version = method->constants()->version(); 3106 InstanceKlass* holder = method->method_holder(); 3107 Handle java_class(THREAD, holder->java_mirror()); 3108 decode_file_and_line(java_class, holder, version, method, bci, filename, source_file, line_number, CHECK); 3109 } 3110 #endif // INCLUDE_JVMCI 3111 3112 // java_lang_ClassFrameInfo 3113 3114 int java_lang_ClassFrameInfo::_classOrMemberName_offset; 3115 int java_lang_ClassFrameInfo::_flags_offset; 3116 3117 #define CLASSFRAMEINFO_FIELDS_DO(macro) \ 3118 macro(_classOrMemberName_offset, k, "classOrMemberName", object_signature, false); \ 3119 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false) 3120 3121 void java_lang_ClassFrameInfo::compute_offsets() { 3122 InstanceKlass* k = vmClasses::ClassFrameInfo_klass(); 3123 CLASSFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3124 } 3125 3126 #if INCLUDE_CDS 3127 void java_lang_ClassFrameInfo::serialize_offsets(SerializeClosure* f) { 3128 CLASSFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3129 } 3130 #endif 3131 3132 static int get_flags(const methodHandle& m) { 3133 int flags = (jushort)( m->access_flags().as_short() & JVM_RECOGNIZED_METHOD_MODIFIERS ); 3134 if (m->is_object_initializer()) { 3135 flags |= java_lang_invoke_MemberName::MN_IS_CONSTRUCTOR; 3136 } else { 3137 // Note: Static initializers can be here. Record them as plain methods. 3138 flags |= java_lang_invoke_MemberName::MN_IS_METHOD; 3139 } 3140 if (m->caller_sensitive()) { 3141 flags |= java_lang_invoke_MemberName::MN_CALLER_SENSITIVE; 3142 } 3143 if (m->is_hidden()) { 3144 flags |= java_lang_invoke_MemberName::MN_HIDDEN_MEMBER; 3145 } 3146 assert((flags & 0xFF000000) == 0, "unexpected flags"); 3147 return flags; 3148 } 3149 3150 oop java_lang_ClassFrameInfo::classOrMemberName(oop obj) { 3151 return obj->obj_field(_classOrMemberName_offset); 3152 } 3153 3154 int java_lang_ClassFrameInfo::flags(oop obj) { 3155 return obj->int_field(_flags_offset); 3156 } 3157 3158 void java_lang_ClassFrameInfo::init_class(Handle stackFrame, const methodHandle& m) { 3159 stackFrame->obj_field_put(_classOrMemberName_offset, m->method_holder()->java_mirror()); 3160 // flags is initialized when ClassFrameInfo object is constructed and retain the value 3161 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m); 3162 stackFrame->int_field_put(_flags_offset, flags); 3163 } 3164 3165 void java_lang_ClassFrameInfo::init_method(Handle stackFrame, const methodHandle& m, TRAPS) { 3166 oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(m, CHECK); 3167 stackFrame->obj_field_put(_classOrMemberName_offset, rmethod_name); 3168 // flags is initialized when ClassFrameInfo object is constructed and retain the value 3169 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m); 3170 stackFrame->int_field_put(_flags_offset, flags); 3171 } 3172 3173 3174 // java_lang_StackFrameInfo 3175 3176 int java_lang_StackFrameInfo::_type_offset; 3177 int java_lang_StackFrameInfo::_name_offset; 3178 int java_lang_StackFrameInfo::_bci_offset; 3179 int java_lang_StackFrameInfo::_version_offset; 3180 int java_lang_StackFrameInfo::_contScope_offset; 3181 3182 #define STACKFRAMEINFO_FIELDS_DO(macro) \ 3183 macro(_type_offset, k, "type", object_signature, false); \ 3184 macro(_name_offset, k, "name", string_signature, false); \ 3185 macro(_bci_offset, k, "bci", int_signature, false); \ 3186 macro(_contScope_offset, k, "contScope", continuationscope_signature, false) 3187 3188 void java_lang_StackFrameInfo::compute_offsets() { 3189 InstanceKlass* k = vmClasses::StackFrameInfo_klass(); 3190 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3191 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3192 } 3193 3194 #if INCLUDE_CDS 3195 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) { 3196 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3197 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3198 } 3199 #endif 3200 3201 Method* java_lang_StackFrameInfo::get_method(oop obj) { 3202 oop m = java_lang_ClassFrameInfo::classOrMemberName(obj); 3203 Method* method = java_lang_invoke_ResolvedMethodName::vmtarget(m); 3204 return method; 3205 } 3206 3207 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS) { 3208 // set Method* or mid/cpref 3209 HandleMark hm(THREAD); 3210 Handle cont_h(THREAD, cont); 3211 java_lang_ClassFrameInfo::init_method(stackFrame, method, CHECK); 3212 3213 // set bci 3214 java_lang_StackFrameInfo::set_bci(stackFrame(), bci); 3215 // method may be redefined; store the version 3216 int version = method->constants()->version(); 3217 assert((jushort)version == version, "version should be short"); 3218 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version); 3219 3220 oop contScope = cont_h() != nullptr ? jdk_internal_vm_Continuation::scope(cont_h()) : (oop)nullptr; 3221 java_lang_StackFrameInfo::set_contScope(stackFrame(), contScope); 3222 } 3223 3224 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) { 3225 ResourceMark rm(THREAD); 3226 HandleMark hm(THREAD); 3227 3228 Method* method = java_lang_StackFrameInfo::get_method(stackFrame()); 3229 InstanceKlass* holder = method->method_holder(); 3230 short version = stackFrame->short_field(_version_offset); 3231 int bci = stackFrame->int_field(_bci_offset); 3232 Symbol* name = method->name(); 3233 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, methodHandle(THREAD, method), version, bci, name, CHECK); 3234 } 3235 3236 oop java_lang_StackFrameInfo::type(oop obj) { 3237 return obj->obj_field(_type_offset); 3238 } 3239 3240 void java_lang_StackFrameInfo::set_type(oop obj, oop value) { 3241 obj->obj_field_put(_type_offset, value); 3242 } 3243 3244 oop java_lang_StackFrameInfo::name(oop obj) { 3245 return obj->obj_field(_name_offset); 3246 } 3247 3248 void java_lang_StackFrameInfo::set_name(oop obj, oop value) { 3249 obj->obj_field_put(_name_offset, value); 3250 } 3251 3252 void java_lang_StackFrameInfo::set_version(oop obj, short value) { 3253 obj->short_field_put(_version_offset, value); 3254 } 3255 3256 void java_lang_StackFrameInfo::set_bci(oop obj, int value) { 3257 assert(value >= 0 && value < max_jushort, "must be a valid bci value"); 3258 obj->int_field_put(_bci_offset, value); 3259 } 3260 3261 void java_lang_StackFrameInfo::set_contScope(oop obj, oop value) { 3262 obj->obj_field_put(_contScope_offset, value); 3263 } 3264 3265 int java_lang_LiveStackFrameInfo::_monitors_offset; 3266 int java_lang_LiveStackFrameInfo::_locals_offset; 3267 int java_lang_LiveStackFrameInfo::_operands_offset; 3268 int java_lang_LiveStackFrameInfo::_mode_offset; 3269 3270 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \ 3271 macro(_monitors_offset, k, "monitors", object_array_signature, false); \ 3272 macro(_locals_offset, k, "locals", object_array_signature, false); \ 3273 macro(_operands_offset, k, "operands", object_array_signature, false); \ 3274 macro(_mode_offset, k, "mode", int_signature, false) 3275 3276 void java_lang_LiveStackFrameInfo::compute_offsets() { 3277 InstanceKlass* k = vmClasses::LiveStackFrameInfo_klass(); 3278 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3279 } 3280 3281 #if INCLUDE_CDS 3282 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) { 3283 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3284 } 3285 #endif 3286 3287 void java_lang_LiveStackFrameInfo::set_monitors(oop obj, oop value) { 3288 obj->obj_field_put(_monitors_offset, value); 3289 } 3290 3291 void java_lang_LiveStackFrameInfo::set_locals(oop obj, oop value) { 3292 obj->obj_field_put(_locals_offset, value); 3293 } 3294 3295 void java_lang_LiveStackFrameInfo::set_operands(oop obj, oop value) { 3296 obj->obj_field_put(_operands_offset, value); 3297 } 3298 3299 void java_lang_LiveStackFrameInfo::set_mode(oop obj, int value) { 3300 obj->int_field_put(_mode_offset, value); 3301 } 3302 3303 3304 // java_lang_AccessibleObject 3305 3306 int java_lang_reflect_AccessibleObject::_override_offset; 3307 3308 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \ 3309 macro(_override_offset, k, "override", bool_signature, false) 3310 3311 void java_lang_reflect_AccessibleObject::compute_offsets() { 3312 InstanceKlass* k = vmClasses::reflect_AccessibleObject_klass(); 3313 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3314 } 3315 3316 #if INCLUDE_CDS 3317 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) { 3318 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3319 } 3320 #endif 3321 3322 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 3323 return (jboolean) reflect->bool_field(_override_offset); 3324 } 3325 3326 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 3327 reflect->bool_field_put(_override_offset, (int) value); 3328 } 3329 3330 // java_lang_reflect_Method 3331 3332 int java_lang_reflect_Method::_clazz_offset; 3333 int java_lang_reflect_Method::_name_offset; 3334 int java_lang_reflect_Method::_returnType_offset; 3335 int java_lang_reflect_Method::_parameterTypes_offset; 3336 int java_lang_reflect_Method::_exceptionTypes_offset; 3337 int java_lang_reflect_Method::_slot_offset; 3338 int java_lang_reflect_Method::_modifiers_offset; 3339 int java_lang_reflect_Method::_signature_offset; 3340 int java_lang_reflect_Method::_annotations_offset; 3341 int java_lang_reflect_Method::_parameter_annotations_offset; 3342 int java_lang_reflect_Method::_annotation_default_offset; 3343 3344 #define METHOD_FIELDS_DO(macro) \ 3345 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3346 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3347 macro(_returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \ 3348 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 3349 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 3350 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 3351 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3352 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 3353 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \ 3354 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \ 3355 macro(_annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false); 3356 3357 void java_lang_reflect_Method::compute_offsets() { 3358 InstanceKlass* k = vmClasses::reflect_Method_klass(); 3359 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3360 } 3361 3362 #if INCLUDE_CDS 3363 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) { 3364 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3365 } 3366 #endif 3367 3368 Handle java_lang_reflect_Method::create(TRAPS) { 3369 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3370 Klass* klass = vmClasses::reflect_Method_klass(); 3371 // This class is eagerly initialized during VM initialization, since we keep a reference 3372 // to one of the methods 3373 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized"); 3374 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD); 3375 } 3376 3377 oop java_lang_reflect_Method::clazz(oop reflect) { 3378 return reflect->obj_field(_clazz_offset); 3379 } 3380 3381 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 3382 reflect->obj_field_put(_clazz_offset, value); 3383 } 3384 3385 int java_lang_reflect_Method::slot(oop reflect) { 3386 return reflect->int_field(_slot_offset); 3387 } 3388 3389 void java_lang_reflect_Method::set_slot(oop reflect, int value) { 3390 reflect->int_field_put(_slot_offset, value); 3391 } 3392 3393 void java_lang_reflect_Method::set_name(oop method, oop value) { 3394 method->obj_field_put(_name_offset, value); 3395 } 3396 3397 oop java_lang_reflect_Method::return_type(oop method) { 3398 return method->obj_field(_returnType_offset); 3399 } 3400 3401 void java_lang_reflect_Method::set_return_type(oop method, oop value) { 3402 method->obj_field_put(_returnType_offset, value); 3403 } 3404 3405 oop java_lang_reflect_Method::parameter_types(oop method) { 3406 return method->obj_field(_parameterTypes_offset); 3407 } 3408 3409 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 3410 method->obj_field_put(_parameterTypes_offset, value); 3411 } 3412 3413 void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 3414 method->obj_field_put(_exceptionTypes_offset, value); 3415 } 3416 3417 void java_lang_reflect_Method::set_modifiers(oop method, int value) { 3418 method->int_field_put(_modifiers_offset, value); 3419 } 3420 3421 void java_lang_reflect_Method::set_signature(oop method, oop value) { 3422 method->obj_field_put(_signature_offset, value); 3423 } 3424 3425 void java_lang_reflect_Method::set_annotations(oop method, oop value) { 3426 method->obj_field_put(_annotations_offset, value); 3427 } 3428 3429 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 3430 method->obj_field_put(_parameter_annotations_offset, value); 3431 } 3432 3433 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 3434 method->obj_field_put(_annotation_default_offset, value); 3435 } 3436 3437 int java_lang_reflect_Constructor::_clazz_offset; 3438 int java_lang_reflect_Constructor::_parameterTypes_offset; 3439 int java_lang_reflect_Constructor::_exceptionTypes_offset; 3440 int java_lang_reflect_Constructor::_slot_offset; 3441 int java_lang_reflect_Constructor::_modifiers_offset; 3442 int java_lang_reflect_Constructor::_signature_offset; 3443 int java_lang_reflect_Constructor::_annotations_offset; 3444 int java_lang_reflect_Constructor::_parameter_annotations_offset; 3445 3446 #define CONSTRUCTOR_FIELDS_DO(macro) \ 3447 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3448 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 3449 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 3450 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 3451 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3452 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 3453 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \ 3454 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); 3455 3456 void java_lang_reflect_Constructor::compute_offsets() { 3457 InstanceKlass* k = vmClasses::reflect_Constructor_klass(); 3458 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3459 } 3460 3461 #if INCLUDE_CDS 3462 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) { 3463 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3464 } 3465 #endif 3466 3467 Handle java_lang_reflect_Constructor::create(TRAPS) { 3468 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3469 Symbol* name = vmSymbols::java_lang_reflect_Constructor(); 3470 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3471 InstanceKlass* ik = InstanceKlass::cast(k); 3472 // Ensure it is initialized 3473 ik->initialize(CHECK_NH); 3474 return ik->allocate_instance_handle(THREAD); 3475 } 3476 3477 oop java_lang_reflect_Constructor::clazz(oop reflect) { 3478 return reflect->obj_field(_clazz_offset); 3479 } 3480 3481 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 3482 reflect->obj_field_put(_clazz_offset, value); 3483 } 3484 3485 oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 3486 return constructor->obj_field(_parameterTypes_offset); 3487 } 3488 3489 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 3490 constructor->obj_field_put(_parameterTypes_offset, value); 3491 } 3492 3493 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 3494 constructor->obj_field_put(_exceptionTypes_offset, value); 3495 } 3496 3497 int java_lang_reflect_Constructor::slot(oop reflect) { 3498 return reflect->int_field(_slot_offset); 3499 } 3500 3501 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 3502 reflect->int_field_put(_slot_offset, value); 3503 } 3504 3505 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 3506 constructor->int_field_put(_modifiers_offset, value); 3507 } 3508 3509 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 3510 constructor->obj_field_put(_signature_offset, value); 3511 } 3512 3513 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 3514 constructor->obj_field_put(_annotations_offset, value); 3515 } 3516 3517 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 3518 method->obj_field_put(_parameter_annotations_offset, value); 3519 } 3520 3521 int java_lang_reflect_Field::_clazz_offset; 3522 int java_lang_reflect_Field::_name_offset; 3523 int java_lang_reflect_Field::_type_offset; 3524 int java_lang_reflect_Field::_slot_offset; 3525 int java_lang_reflect_Field::_modifiers_offset; 3526 int java_lang_reflect_Field::_trusted_final_offset; 3527 int java_lang_reflect_Field::_signature_offset; 3528 int java_lang_reflect_Field::_annotations_offset; 3529 3530 #define FIELD_FIELDS_DO(macro) \ 3531 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3532 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3533 macro(_type_offset, k, vmSymbols::type_name(), class_signature, false); \ 3534 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 3535 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3536 macro(_trusted_final_offset, k, vmSymbols::trusted_final_name(), bool_signature, false); \ 3537 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 3538 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); 3539 3540 void java_lang_reflect_Field::compute_offsets() { 3541 InstanceKlass* k = vmClasses::reflect_Field_klass(); 3542 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3543 } 3544 3545 #if INCLUDE_CDS 3546 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) { 3547 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3548 } 3549 #endif 3550 3551 Handle java_lang_reflect_Field::create(TRAPS) { 3552 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3553 Symbol* name = vmSymbols::java_lang_reflect_Field(); 3554 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3555 InstanceKlass* ik = InstanceKlass::cast(k); 3556 // Ensure it is initialized 3557 ik->initialize(CHECK_NH); 3558 return ik->allocate_instance_handle(THREAD); 3559 } 3560 3561 oop java_lang_reflect_Field::clazz(oop reflect) { 3562 return reflect->obj_field(_clazz_offset); 3563 } 3564 3565 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 3566 reflect->obj_field_put(_clazz_offset, value); 3567 } 3568 3569 oop java_lang_reflect_Field::name(oop field) { 3570 return field->obj_field(_name_offset); 3571 } 3572 3573 void java_lang_reflect_Field::set_name(oop field, oop value) { 3574 field->obj_field_put(_name_offset, value); 3575 } 3576 3577 oop java_lang_reflect_Field::type(oop field) { 3578 return field->obj_field(_type_offset); 3579 } 3580 3581 void java_lang_reflect_Field::set_type(oop field, oop value) { 3582 field->obj_field_put(_type_offset, value); 3583 } 3584 3585 int java_lang_reflect_Field::slot(oop reflect) { 3586 return reflect->int_field(_slot_offset); 3587 } 3588 3589 void java_lang_reflect_Field::set_slot(oop reflect, int value) { 3590 reflect->int_field_put(_slot_offset, value); 3591 } 3592 3593 int java_lang_reflect_Field::modifiers(oop field) { 3594 return field->int_field(_modifiers_offset); 3595 } 3596 3597 void java_lang_reflect_Field::set_modifiers(oop field, int value) { 3598 field->int_field_put(_modifiers_offset, value); 3599 } 3600 3601 void java_lang_reflect_Field::set_trusted_final(oop field) { 3602 field->bool_field_put(_trusted_final_offset, true); 3603 } 3604 3605 void java_lang_reflect_Field::set_signature(oop field, oop value) { 3606 field->obj_field_put(_signature_offset, value); 3607 } 3608 3609 void java_lang_reflect_Field::set_annotations(oop field, oop value) { 3610 field->obj_field_put(_annotations_offset, value); 3611 } 3612 3613 oop java_lang_reflect_RecordComponent::create(InstanceKlass* holder, RecordComponent* component, TRAPS) { 3614 // Allocate java.lang.reflect.RecordComponent instance 3615 HandleMark hm(THREAD); 3616 InstanceKlass* ik = vmClasses::RecordComponent_klass(); 3617 assert(ik != nullptr, "must be loaded"); 3618 ik->initialize(CHECK_NULL); 3619 3620 Handle element = ik->allocate_instance_handle(CHECK_NULL); 3621 3622 Handle decl_class(THREAD, holder->java_mirror()); 3623 java_lang_reflect_RecordComponent::set_clazz(element(), decl_class()); 3624 3625 Symbol* name = holder->constants()->symbol_at(component->name_index()); // name_index is a utf8 3626 oop component_name = StringTable::intern(name, CHECK_NULL); 3627 java_lang_reflect_RecordComponent::set_name(element(), component_name); 3628 3629 Symbol* type = holder->constants()->symbol_at(component->descriptor_index()); 3630 Handle component_type_h = 3631 SystemDictionary::find_java_mirror_for_type(type, holder, SignatureStream::NCDFError, CHECK_NULL); 3632 java_lang_reflect_RecordComponent::set_type(element(), component_type_h()); 3633 3634 Method* accessor_method = nullptr; 3635 { 3636 // Prepend "()" to type to create the full method signature. 3637 ResourceMark rm(THREAD); 3638 int sig_len = type->utf8_length() + 3; // "()" and null char 3639 char* sig = NEW_RESOURCE_ARRAY(char, sig_len); 3640 jio_snprintf(sig, sig_len, "%c%c%s", JVM_SIGNATURE_FUNC, JVM_SIGNATURE_ENDFUNC, type->as_C_string()); 3641 TempNewSymbol full_sig = SymbolTable::new_symbol(sig); 3642 accessor_method = holder->find_instance_method(name, full_sig, Klass::PrivateLookupMode::find); 3643 } 3644 3645 if (accessor_method != nullptr) { 3646 methodHandle method(THREAD, accessor_method); 3647 oop m = Reflection::new_method(method, false, CHECK_NULL); 3648 java_lang_reflect_RecordComponent::set_accessor(element(), m); 3649 } else { 3650 java_lang_reflect_RecordComponent::set_accessor(element(), nullptr); 3651 } 3652 3653 int sig_index = component->generic_signature_index(); 3654 if (sig_index > 0) { 3655 Symbol* sig = holder->constants()->symbol_at(sig_index); // sig_index is a utf8 3656 oop component_sig = StringTable::intern(sig, CHECK_NULL); 3657 java_lang_reflect_RecordComponent::set_signature(element(), component_sig); 3658 } else { 3659 java_lang_reflect_RecordComponent::set_signature(element(), nullptr); 3660 } 3661 3662 typeArrayOop annotation_oop = Annotations::make_java_array(component->annotations(), CHECK_NULL); 3663 java_lang_reflect_RecordComponent::set_annotations(element(), annotation_oop); 3664 3665 typeArrayOop type_annotation_oop = Annotations::make_java_array(component->type_annotations(), CHECK_NULL); 3666 java_lang_reflect_RecordComponent::set_typeAnnotations(element(), type_annotation_oop); 3667 3668 return element(); 3669 } 3670 3671 int reflect_ConstantPool::_oop_offset; 3672 3673 #define CONSTANTPOOL_FIELDS_DO(macro) \ 3674 macro(_oop_offset, k, "constantPoolOop", object_signature, false) 3675 3676 void reflect_ConstantPool::compute_offsets() { 3677 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass(); 3678 // The field is called ConstantPool* in the sun.reflect.ConstantPool class. 3679 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3680 } 3681 3682 #if INCLUDE_CDS 3683 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) { 3684 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3685 } 3686 #endif 3687 3688 int java_lang_reflect_Parameter::_name_offset; 3689 int java_lang_reflect_Parameter::_modifiers_offset; 3690 int java_lang_reflect_Parameter::_index_offset; 3691 int java_lang_reflect_Parameter::_executable_offset; 3692 3693 #define PARAMETER_FIELDS_DO(macro) \ 3694 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3695 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3696 macro(_index_offset, k, vmSymbols::index_name(), int_signature, false); \ 3697 macro(_executable_offset, k, vmSymbols::executable_name(), executable_signature, false) 3698 3699 void java_lang_reflect_Parameter::compute_offsets() { 3700 InstanceKlass* k = vmClasses::reflect_Parameter_klass(); 3701 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3702 } 3703 3704 #if INCLUDE_CDS 3705 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) { 3706 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3707 } 3708 #endif 3709 3710 Handle java_lang_reflect_Parameter::create(TRAPS) { 3711 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3712 Symbol* name = vmSymbols::java_lang_reflect_Parameter(); 3713 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3714 InstanceKlass* ik = InstanceKlass::cast(k); 3715 // Ensure it is initialized 3716 ik->initialize(CHECK_NH); 3717 return ik->allocate_instance_handle(THREAD); 3718 } 3719 3720 oop java_lang_reflect_Parameter::name(oop param) { 3721 return param->obj_field(_name_offset); 3722 } 3723 3724 void java_lang_reflect_Parameter::set_name(oop param, oop value) { 3725 param->obj_field_put(_name_offset, value); 3726 } 3727 3728 int java_lang_reflect_Parameter::modifiers(oop param) { 3729 return param->int_field(_modifiers_offset); 3730 } 3731 3732 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) { 3733 param->int_field_put(_modifiers_offset, value); 3734 } 3735 3736 int java_lang_reflect_Parameter::index(oop param) { 3737 return param->int_field(_index_offset); 3738 } 3739 3740 void java_lang_reflect_Parameter::set_index(oop param, int value) { 3741 param->int_field_put(_index_offset, value); 3742 } 3743 3744 oop java_lang_reflect_Parameter::executable(oop param) { 3745 return param->obj_field(_executable_offset); 3746 } 3747 3748 void java_lang_reflect_Parameter::set_executable(oop param, oop value) { 3749 param->obj_field_put(_executable_offset, value); 3750 } 3751 3752 // java_lang_Module 3753 3754 int java_lang_Module::_loader_offset; 3755 int java_lang_Module::_name_offset; 3756 int java_lang_Module::_module_entry_offset; 3757 3758 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) { 3759 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3760 return JavaCalls::construct_new_instance(vmClasses::Module_klass(), 3761 vmSymbols::java_lang_module_init_signature(), 3762 loader, module_name, CHECK_NH); 3763 } 3764 3765 #define MODULE_FIELDS_DO(macro) \ 3766 macro(_loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \ 3767 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false) 3768 3769 void java_lang_Module::compute_offsets() { 3770 InstanceKlass* k = vmClasses::Module_klass(); 3771 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3772 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3773 } 3774 3775 #if INCLUDE_CDS 3776 void java_lang_Module::serialize_offsets(SerializeClosure* f) { 3777 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3778 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3779 } 3780 #endif 3781 3782 oop java_lang_Module::loader(oop module) { 3783 return module->obj_field(_loader_offset); 3784 } 3785 3786 void java_lang_Module::set_loader(oop module, oop value) { 3787 module->obj_field_put(_loader_offset, value); 3788 } 3789 3790 oop java_lang_Module::name(oop module) { 3791 return module->obj_field(_name_offset); 3792 } 3793 3794 void java_lang_Module::set_name(oop module, oop value) { 3795 module->obj_field_put(_name_offset, value); 3796 } 3797 3798 ModuleEntry* java_lang_Module::module_entry_raw(oop module) { 3799 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset"); 3800 assert(module != nullptr, "module can't be null"); 3801 assert(oopDesc::is_oop(module), "module must be oop"); 3802 3803 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset); 3804 return module_entry; 3805 } 3806 3807 ModuleEntry* java_lang_Module::module_entry(oop module) { 3808 ModuleEntry* module_entry = module_entry_raw(module); 3809 if (module_entry == nullptr) { 3810 // If the inject field containing the ModuleEntry* is null then return the 3811 // class loader's unnamed module. 3812 oop loader = java_lang_Module::loader(module); 3813 Handle h_loader = Handle(Thread::current(), loader); 3814 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader); 3815 return loader_cld->unnamed_module(); 3816 } 3817 return module_entry; 3818 } 3819 3820 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) { 3821 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset"); 3822 assert(module != nullptr, "module can't be null"); 3823 assert(oopDesc::is_oop(module), "module must be oop"); 3824 module->address_field_put(_module_entry_offset, (address)module_entry); 3825 } 3826 3827 Handle reflect_ConstantPool::create(TRAPS) { 3828 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3829 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass(); 3830 // Ensure it is initialized 3831 k->initialize(CHECK_NH); 3832 return k->allocate_instance_handle(THREAD); 3833 } 3834 3835 3836 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) { 3837 oop mirror = value->pool_holder()->java_mirror(); 3838 // Save the mirror to get back the constant pool. 3839 reflect->obj_field_put(_oop_offset, mirror); 3840 } 3841 3842 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) { 3843 3844 oop mirror = reflect->obj_field(_oop_offset); 3845 Klass* k = java_lang_Class::as_Klass(mirror); 3846 assert(k->is_instance_klass(), "Must be"); 3847 3848 // Get the constant pool back from the klass. Since class redefinition 3849 // merges the new constant pool into the old, this is essentially the 3850 // same constant pool as the original. If constant pool merging is 3851 // no longer done in the future, this will have to change to save 3852 // the original. 3853 return InstanceKlass::cast(k)->constants(); 3854 } 3855 3856 3857 // Support for java_lang_ref_Reference 3858 3859 bool java_lang_ref_Reference::_offsets_initialized; 3860 3861 int java_lang_ref_Reference::_referent_offset; 3862 int java_lang_ref_Reference::_queue_offset; 3863 int java_lang_ref_Reference::_next_offset; 3864 int java_lang_ref_Reference::_discovered_offset; 3865 3866 #define REFERENCE_FIELDS_DO(macro) \ 3867 macro(_referent_offset, k, "referent", object_signature, false); \ 3868 macro(_queue_offset, k, "queue", referencequeue_signature, false); \ 3869 macro(_next_offset, k, "next", reference_signature, false); \ 3870 macro(_discovered_offset, k, "discovered", reference_signature, false); 3871 3872 void java_lang_ref_Reference::compute_offsets() { 3873 if (_offsets_initialized) { 3874 return; 3875 } 3876 _offsets_initialized = true; 3877 InstanceKlass* k = vmClasses::Reference_klass(); 3878 REFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3879 } 3880 3881 #if INCLUDE_CDS 3882 void java_lang_ref_Reference::serialize_offsets(SerializeClosure* f) { 3883 f->do_bool(&_offsets_initialized); 3884 REFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3885 } 3886 #endif 3887 3888 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) { 3889 assert(obj != nullptr, "sanity"); 3890 if (offset != _referent_offset) { 3891 return false; 3892 } 3893 3894 Klass* k = obj->klass(); 3895 if (!k->is_instance_klass()) { 3896 return false; 3897 } 3898 3899 InstanceKlass* ik = InstanceKlass::cast(obj->klass()); 3900 bool is_reference = ik->reference_type() != REF_NONE; 3901 assert(!is_reference || ik->is_subclass_of(vmClasses::Reference_klass()), "sanity"); 3902 return is_reference; 3903 } 3904 3905 int java_lang_boxing_object::_value_offset; 3906 int java_lang_boxing_object::_long_value_offset; 3907 3908 #define BOXING_FIELDS_DO(macro) \ 3909 macro(_value_offset, integerKlass, "value", int_signature, false); \ 3910 macro(_long_value_offset, longKlass, "value", long_signature, false); 3911 3912 void java_lang_boxing_object::compute_offsets() { 3913 InstanceKlass* integerKlass = vmClasses::Integer_klass(); 3914 InstanceKlass* longKlass = vmClasses::Long_klass(); 3915 BOXING_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3916 } 3917 3918 #if INCLUDE_CDS 3919 void java_lang_boxing_object::serialize_offsets(SerializeClosure* f) { 3920 BOXING_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3921 } 3922 #endif 3923 3924 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 3925 Klass* k = vmClasses::box_klass(type); 3926 if (k == nullptr) return nullptr; 3927 InstanceKlass* ik = InstanceKlass::cast(k); 3928 if (!ik->is_initialized()) { 3929 ik->initialize(CHECK_NULL); 3930 } 3931 return ik->allocate_instance(THREAD); 3932 } 3933 3934 3935 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 3936 oop box = initialize_and_allocate(type, CHECK_NULL); 3937 if (box == nullptr) return nullptr; 3938 switch (type) { 3939 case T_BOOLEAN: 3940 box->bool_field_put(_value_offset, value->z); 3941 break; 3942 case T_CHAR: 3943 box->char_field_put(_value_offset, value->c); 3944 break; 3945 case T_FLOAT: 3946 box->float_field_put(_value_offset, value->f); 3947 break; 3948 case T_DOUBLE: 3949 box->double_field_put(_long_value_offset, value->d); 3950 break; 3951 case T_BYTE: 3952 box->byte_field_put(_value_offset, value->b); 3953 break; 3954 case T_SHORT: 3955 box->short_field_put(_value_offset, value->s); 3956 break; 3957 case T_INT: 3958 box->int_field_put(_value_offset, value->i); 3959 break; 3960 case T_LONG: 3961 box->long_field_put(_long_value_offset, value->j); 3962 break; 3963 default: 3964 return nullptr; 3965 } 3966 return box; 3967 } 3968 3969 3970 BasicType java_lang_boxing_object::basic_type(oop box) { 3971 if (box == nullptr) return T_ILLEGAL; 3972 BasicType type = vmClasses::box_klass_type(box->klass()); 3973 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 3974 return T_ILLEGAL; 3975 return type; 3976 } 3977 3978 3979 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 3980 BasicType type = vmClasses::box_klass_type(box->klass()); 3981 switch (type) { 3982 case T_BOOLEAN: 3983 value->z = box->bool_field(_value_offset); 3984 break; 3985 case T_CHAR: 3986 value->c = box->char_field(_value_offset); 3987 break; 3988 case T_FLOAT: 3989 value->f = box->float_field(_value_offset); 3990 break; 3991 case T_DOUBLE: 3992 value->d = box->double_field(_long_value_offset); 3993 break; 3994 case T_BYTE: 3995 value->b = box->byte_field(_value_offset); 3996 break; 3997 case T_SHORT: 3998 value->s = box->short_field(_value_offset); 3999 break; 4000 case T_INT: 4001 value->i = box->int_field(_value_offset); 4002 break; 4003 case T_LONG: 4004 value->j = box->long_field(_long_value_offset); 4005 break; 4006 default: 4007 return T_ILLEGAL; 4008 } // end switch 4009 return type; 4010 } 4011 4012 4013 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 4014 BasicType type = vmClasses::box_klass_type(box->klass()); 4015 switch (type) { 4016 case T_BOOLEAN: 4017 box->bool_field_put(_value_offset, value->z); 4018 break; 4019 case T_CHAR: 4020 box->char_field_put(_value_offset, value->c); 4021 break; 4022 case T_FLOAT: 4023 box->float_field_put(_value_offset, value->f); 4024 break; 4025 case T_DOUBLE: 4026 box->double_field_put(_long_value_offset, value->d); 4027 break; 4028 case T_BYTE: 4029 box->byte_field_put(_value_offset, value->b); 4030 break; 4031 case T_SHORT: 4032 box->short_field_put(_value_offset, value->s); 4033 break; 4034 case T_INT: 4035 box->int_field_put(_value_offset, value->i); 4036 break; 4037 case T_LONG: 4038 box->long_field_put(_long_value_offset, value->j); 4039 break; 4040 default: 4041 return T_ILLEGAL; 4042 } // end switch 4043 return type; 4044 } 4045 4046 4047 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) { 4048 switch (type) { 4049 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break; 4050 case T_CHAR: st->print("%d", value->c); break; 4051 case T_BYTE: st->print("%d", value->b); break; 4052 case T_SHORT: st->print("%d", value->s); break; 4053 case T_INT: st->print("%d", value->i); break; 4054 case T_LONG: st->print(JLONG_FORMAT, value->j); break; 4055 case T_FLOAT: st->print("%f", value->f); break; 4056 case T_DOUBLE: st->print("%lf", value->d); break; 4057 default: st->print("type %d?", type); break; 4058 } 4059 } 4060 4061 4062 // Support for java_lang_ref_SoftReference 4063 // 4064 4065 int java_lang_ref_SoftReference::_timestamp_offset; 4066 int java_lang_ref_SoftReference::_static_clock_offset; 4067 4068 #define SOFTREFERENCE_FIELDS_DO(macro) \ 4069 macro(_timestamp_offset, k, "timestamp", long_signature, false); \ 4070 macro(_static_clock_offset, k, "clock", long_signature, true) 4071 4072 void java_lang_ref_SoftReference::compute_offsets() { 4073 InstanceKlass* k = vmClasses::SoftReference_klass(); 4074 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4075 } 4076 4077 #if INCLUDE_CDS 4078 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) { 4079 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4080 } 4081 #endif 4082 4083 jlong java_lang_ref_SoftReference::timestamp(oop ref) { 4084 return ref->long_field(_timestamp_offset); 4085 } 4086 4087 jlong java_lang_ref_SoftReference::clock() { 4088 InstanceKlass* ik = vmClasses::SoftReference_klass(); 4089 oop base = ik->static_field_base_raw(); 4090 return base->long_field(_static_clock_offset); 4091 } 4092 4093 void java_lang_ref_SoftReference::set_clock(jlong value) { 4094 InstanceKlass* ik = vmClasses::SoftReference_klass(); 4095 oop base = ik->static_field_base_raw(); 4096 base->long_field_put(_static_clock_offset, value); 4097 } 4098 4099 // Support for java_lang_invoke_DirectMethodHandle 4100 4101 int java_lang_invoke_DirectMethodHandle::_member_offset; 4102 4103 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) { 4104 oop member_name = nullptr; 4105 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh), 4106 "a DirectMethodHandle oop is expected"); 4107 return dmh->obj_field(_member_offset); 4108 } 4109 4110 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \ 4111 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false) 4112 4113 void java_lang_invoke_DirectMethodHandle::compute_offsets() { 4114 InstanceKlass* k = vmClasses::DirectMethodHandle_klass(); 4115 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4116 } 4117 4118 #if INCLUDE_CDS 4119 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) { 4120 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4121 } 4122 #endif 4123 4124 // Support for java_lang_invoke_MethodHandle 4125 4126 int java_lang_invoke_MethodHandle::_type_offset; 4127 int java_lang_invoke_MethodHandle::_form_offset; 4128 4129 int java_lang_invoke_MemberName::_clazz_offset; 4130 int java_lang_invoke_MemberName::_name_offset; 4131 int java_lang_invoke_MemberName::_type_offset; 4132 int java_lang_invoke_MemberName::_flags_offset; 4133 int java_lang_invoke_MemberName::_method_offset; 4134 int java_lang_invoke_MemberName::_vmindex_offset; 4135 4136 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset; 4137 int java_lang_invoke_ResolvedMethodName::_vmholder_offset; 4138 4139 int java_lang_invoke_LambdaForm::_vmentry_offset; 4140 4141 #define METHODHANDLE_FIELDS_DO(macro) \ 4142 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \ 4143 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false) 4144 4145 void java_lang_invoke_MethodHandle::compute_offsets() { 4146 InstanceKlass* k = vmClasses::MethodHandle_klass(); 4147 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4148 } 4149 4150 #if INCLUDE_CDS 4151 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) { 4152 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4153 } 4154 #endif 4155 4156 #define MEMBERNAME_FIELDS_DO(macro) \ 4157 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 4158 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 4159 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \ 4160 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \ 4161 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false) 4162 4163 void java_lang_invoke_MemberName::compute_offsets() { 4164 InstanceKlass* k = vmClasses::MemberName_klass(); 4165 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4166 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4167 } 4168 4169 #if INCLUDE_CDS 4170 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) { 4171 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4172 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4173 } 4174 #endif 4175 4176 #define RESOLVEDMETHOD_FIELDS_DO(macro) \ 4177 macro(_vmholder_offset, k, "vmholder", class_signature, false) 4178 4179 void java_lang_invoke_ResolvedMethodName::compute_offsets() { 4180 InstanceKlass* k = vmClasses::ResolvedMethodName_klass(); 4181 assert(k != nullptr, "jdk mismatch"); 4182 RESOLVEDMETHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4183 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4184 } 4185 4186 #if INCLUDE_CDS 4187 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) { 4188 RESOLVEDMETHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4189 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4190 } 4191 #endif 4192 4193 #define LAMBDAFORM_FIELDS_DO(macro) \ 4194 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false) 4195 4196 void java_lang_invoke_LambdaForm::compute_offsets() { 4197 InstanceKlass* k = vmClasses::LambdaForm_klass(); 4198 assert (k != nullptr, "jdk mismatch"); 4199 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4200 } 4201 4202 #if INCLUDE_CDS 4203 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) { 4204 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4205 } 4206 #endif 4207 4208 bool java_lang_invoke_LambdaForm::is_instance(oop obj) { 4209 return obj != nullptr && is_subclass(obj->klass()); 4210 } 4211 4212 int jdk_internal_foreign_abi_NativeEntryPoint::_method_type_offset; 4213 int jdk_internal_foreign_abi_NativeEntryPoint::_downcall_stub_address_offset; 4214 4215 #define NEP_FIELDS_DO(macro) \ 4216 macro(_method_type_offset, k, "methodType", java_lang_invoke_MethodType_signature, false); \ 4217 macro(_downcall_stub_address_offset, k, "downcallStubAddress", long_signature, false); 4218 4219 bool jdk_internal_foreign_abi_NativeEntryPoint::is_instance(oop obj) { 4220 return obj != nullptr && is_subclass(obj->klass()); 4221 } 4222 4223 void jdk_internal_foreign_abi_NativeEntryPoint::compute_offsets() { 4224 InstanceKlass* k = vmClasses::NativeEntryPoint_klass(); 4225 NEP_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4226 } 4227 4228 #if INCLUDE_CDS 4229 void jdk_internal_foreign_abi_NativeEntryPoint::serialize_offsets(SerializeClosure* f) { 4230 NEP_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4231 } 4232 #endif 4233 4234 oop jdk_internal_foreign_abi_NativeEntryPoint::method_type(oop entry) { 4235 return entry->obj_field(_method_type_offset); 4236 } 4237 4238 jlong jdk_internal_foreign_abi_NativeEntryPoint::downcall_stub_address(oop entry) { 4239 return entry->long_field(_downcall_stub_address_offset); 4240 } 4241 4242 int jdk_internal_foreign_abi_ABIDescriptor::_inputStorage_offset; 4243 int jdk_internal_foreign_abi_ABIDescriptor::_outputStorage_offset; 4244 int jdk_internal_foreign_abi_ABIDescriptor::_volatileStorage_offset; 4245 int jdk_internal_foreign_abi_ABIDescriptor::_stackAlignment_offset; 4246 int jdk_internal_foreign_abi_ABIDescriptor::_shadowSpace_offset; 4247 int jdk_internal_foreign_abi_ABIDescriptor::_scratch1_offset; 4248 int jdk_internal_foreign_abi_ABIDescriptor::_scratch2_offset; 4249 4250 #define ABIDescriptor_FIELDS_DO(macro) \ 4251 macro(_inputStorage_offset, k, "inputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \ 4252 macro(_outputStorage_offset, k, "outputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \ 4253 macro(_volatileStorage_offset, k, "volatileStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \ 4254 macro(_stackAlignment_offset, k, "stackAlignment", int_signature, false); \ 4255 macro(_shadowSpace_offset, k, "shadowSpace", int_signature, false); \ 4256 macro(_scratch1_offset, k, "scratch1", jdk_internal_foreign_abi_VMStorage_signature, false); \ 4257 macro(_scratch2_offset, k, "scratch2", jdk_internal_foreign_abi_VMStorage_signature, false); 4258 4259 bool jdk_internal_foreign_abi_ABIDescriptor::is_instance(oop obj) { 4260 return obj != nullptr && is_subclass(obj->klass()); 4261 } 4262 4263 void jdk_internal_foreign_abi_ABIDescriptor::compute_offsets() { 4264 InstanceKlass* k = vmClasses::ABIDescriptor_klass(); 4265 ABIDescriptor_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4266 } 4267 4268 #if INCLUDE_CDS 4269 void jdk_internal_foreign_abi_ABIDescriptor::serialize_offsets(SerializeClosure* f) { 4270 ABIDescriptor_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4271 } 4272 #endif 4273 4274 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::inputStorage(oop entry) { 4275 return oop_cast<objArrayOop>(entry->obj_field(_inputStorage_offset)); 4276 } 4277 4278 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::outputStorage(oop entry) { 4279 return oop_cast<objArrayOop>(entry->obj_field(_outputStorage_offset)); 4280 } 4281 4282 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::volatileStorage(oop entry) { 4283 return oop_cast<objArrayOop>(entry->obj_field(_volatileStorage_offset)); 4284 } 4285 4286 jint jdk_internal_foreign_abi_ABIDescriptor::stackAlignment(oop entry) { 4287 return entry->int_field(_stackAlignment_offset); 4288 } 4289 4290 jint jdk_internal_foreign_abi_ABIDescriptor::shadowSpace(oop entry) { 4291 return entry->int_field(_shadowSpace_offset); 4292 } 4293 4294 oop jdk_internal_foreign_abi_ABIDescriptor::scratch1(oop entry) { 4295 return entry->obj_field(_scratch1_offset); 4296 } 4297 4298 oop jdk_internal_foreign_abi_ABIDescriptor::scratch2(oop entry) { 4299 return entry->obj_field(_scratch2_offset); 4300 } 4301 4302 int jdk_internal_foreign_abi_VMStorage::_type_offset; 4303 int jdk_internal_foreign_abi_VMStorage::_indexOrOffset_offset; 4304 int jdk_internal_foreign_abi_VMStorage::_segmentMaskOrSize_offset; 4305 int jdk_internal_foreign_abi_VMStorage::_debugName_offset; 4306 4307 #define VMStorage_FIELDS_DO(macro) \ 4308 macro(_type_offset, k, "type", byte_signature, false); \ 4309 macro(_indexOrOffset_offset, k, "indexOrOffset", int_signature, false); \ 4310 macro(_segmentMaskOrSize_offset, k, "segmentMaskOrSize", short_signature, false); \ 4311 macro(_debugName_offset, k, "debugName", string_signature, false); \ 4312 4313 bool jdk_internal_foreign_abi_VMStorage::is_instance(oop obj) { 4314 return obj != nullptr && is_subclass(obj->klass()); 4315 } 4316 4317 void jdk_internal_foreign_abi_VMStorage::compute_offsets() { 4318 InstanceKlass* k = vmClasses::VMStorage_klass(); 4319 VMStorage_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4320 } 4321 4322 #if INCLUDE_CDS 4323 void jdk_internal_foreign_abi_VMStorage::serialize_offsets(SerializeClosure* f) { 4324 VMStorage_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4325 } 4326 #endif 4327 4328 jbyte jdk_internal_foreign_abi_VMStorage::type(oop entry) { 4329 return entry->byte_field(_type_offset); 4330 } 4331 4332 jint jdk_internal_foreign_abi_VMStorage::index_or_offset(oop entry) { 4333 return entry->int_field(_indexOrOffset_offset); 4334 } 4335 4336 jshort jdk_internal_foreign_abi_VMStorage::segment_mask_or_size(oop entry) { 4337 return entry->short_field(_segmentMaskOrSize_offset); 4338 } 4339 4340 oop jdk_internal_foreign_abi_VMStorage::debugName(oop entry) { 4341 return entry->obj_field(_debugName_offset); 4342 } 4343 4344 int jdk_internal_foreign_abi_CallConv::_argRegs_offset; 4345 int jdk_internal_foreign_abi_CallConv::_retRegs_offset; 4346 4347 #define CallConv_FIELDS_DO(macro) \ 4348 macro(_argRegs_offset, k, "argRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \ 4349 macro(_retRegs_offset, k, "retRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \ 4350 4351 bool jdk_internal_foreign_abi_CallConv::is_instance(oop obj) { 4352 return obj != nullptr && is_subclass(obj->klass()); 4353 } 4354 4355 void jdk_internal_foreign_abi_CallConv::compute_offsets() { 4356 InstanceKlass* k = vmClasses::CallConv_klass(); 4357 CallConv_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4358 } 4359 4360 #if INCLUDE_CDS 4361 void jdk_internal_foreign_abi_CallConv::serialize_offsets(SerializeClosure* f) { 4362 CallConv_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4363 } 4364 #endif 4365 4366 objArrayOop jdk_internal_foreign_abi_CallConv::argRegs(oop entry) { 4367 return oop_cast<objArrayOop>(entry->obj_field(_argRegs_offset)); 4368 } 4369 4370 objArrayOop jdk_internal_foreign_abi_CallConv::retRegs(oop entry) { 4371 return oop_cast<objArrayOop>(entry->obj_field(_retRegs_offset)); 4372 } 4373 4374 oop java_lang_invoke_MethodHandle::type(oop mh) { 4375 return mh->obj_field(_type_offset); 4376 } 4377 4378 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) { 4379 mh->obj_field_put(_type_offset, mtype); 4380 } 4381 4382 oop java_lang_invoke_MethodHandle::form(oop mh) { 4383 assert(_form_offset != 0, ""); 4384 return mh->obj_field(_form_offset); 4385 } 4386 4387 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) { 4388 assert(_form_offset != 0, ""); 4389 mh->obj_field_put(_form_offset, lform); 4390 } 4391 4392 /// MemberName accessors 4393 4394 oop java_lang_invoke_MemberName::clazz(oop mname) { 4395 assert(is_instance(mname), "wrong type"); 4396 return mname->obj_field(_clazz_offset); 4397 } 4398 4399 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) { 4400 assert(is_instance(mname), "wrong type"); 4401 mname->obj_field_put(_clazz_offset, clazz); 4402 } 4403 4404 oop java_lang_invoke_MemberName::name(oop mname) { 4405 assert(is_instance(mname), "wrong type"); 4406 return mname->obj_field(_name_offset); 4407 } 4408 4409 void java_lang_invoke_MemberName::set_name(oop mname, oop name) { 4410 assert(is_instance(mname), "wrong type"); 4411 mname->obj_field_put(_name_offset, name); 4412 } 4413 4414 oop java_lang_invoke_MemberName::type(oop mname) { 4415 assert(is_instance(mname), "wrong type"); 4416 return mname->obj_field(_type_offset); 4417 } 4418 4419 void java_lang_invoke_MemberName::set_type(oop mname, oop type) { 4420 assert(is_instance(mname), "wrong type"); 4421 mname->obj_field_put(_type_offset, type); 4422 } 4423 4424 int java_lang_invoke_MemberName::flags(oop mname) { 4425 assert(is_instance(mname), "wrong type"); 4426 return mname->int_field(_flags_offset); 4427 } 4428 4429 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) { 4430 assert(is_instance(mname), "wrong type"); 4431 mname->int_field_put(_flags_offset, flags); 4432 } 4433 4434 4435 // Return vmtarget from ResolvedMethodName method field through indirection 4436 Method* java_lang_invoke_MemberName::vmtarget(oop mname) { 4437 assert(is_instance(mname), "wrong type"); 4438 oop method = mname->obj_field(_method_offset); 4439 return method == nullptr ? nullptr : java_lang_invoke_ResolvedMethodName::vmtarget(method); 4440 } 4441 4442 bool java_lang_invoke_MemberName::is_method(oop mname) { 4443 assert(is_instance(mname), "must be MemberName"); 4444 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0; 4445 } 4446 4447 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) { 4448 assert(is_instance(mname), "wrong type"); 4449 mname->obj_field_put(_method_offset, resolved_method); 4450 } 4451 4452 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) { 4453 assert(is_instance(mname), "wrong type"); 4454 return (intptr_t) mname->address_field(_vmindex_offset); 4455 } 4456 4457 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) { 4458 assert(is_instance(mname), "wrong type"); 4459 mname->address_field_put(_vmindex_offset, (address) index); 4460 } 4461 4462 4463 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) { 4464 assert(is_instance(resolved_method), "wrong type"); 4465 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset); 4466 assert(m->is_method(), "must be"); 4467 return m; 4468 } 4469 4470 // Used by redefinition to change Method* to new Method* with same hash (name, signature) 4471 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) { 4472 assert(is_instance(resolved_method), "wrong type"); 4473 resolved_method->address_field_put(_vmtarget_offset, (address)m); 4474 } 4475 4476 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) { 4477 assert(is_instance(resolved_method), "wrong type"); 4478 resolved_method->obj_field_put(_vmholder_offset, holder); 4479 } 4480 4481 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) { 4482 const Method* method = m(); 4483 4484 // lookup ResolvedMethod oop in the table, or create a new one and intern it 4485 oop resolved_method = ResolvedMethodTable::find_method(method); 4486 if (resolved_method != nullptr) { 4487 return resolved_method; 4488 } 4489 4490 InstanceKlass* k = vmClasses::ResolvedMethodName_klass(); 4491 if (!k->is_initialized()) { 4492 k->initialize(CHECK_NULL); 4493 } 4494 4495 oop new_resolved_method = k->allocate_instance(CHECK_NULL); 4496 4497 NoSafepointVerifier nsv; 4498 4499 if (method->is_old()) { 4500 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() : 4501 method->get_new_method(); 4502 } 4503 4504 InstanceKlass* holder = method->method_holder(); 4505 4506 set_vmtarget(new_resolved_method, const_cast<Method*>(method)); 4507 // Add a reference to the loader (actually mirror because hidden classes may not have 4508 // distinct loaders) to ensure the metadata is kept alive. 4509 // This mirror may be different than the one in clazz field. 4510 set_vmholder(new_resolved_method, holder->java_mirror()); 4511 4512 // Set flag in class to indicate this InstanceKlass has entries in the table 4513 // to avoid walking table during redefinition if none of the redefined classes 4514 // have any membernames in the table. 4515 holder->set_has_resolved_methods(); 4516 4517 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method)); 4518 } 4519 4520 oop java_lang_invoke_LambdaForm::vmentry(oop lform) { 4521 assert(is_instance(lform), "wrong type"); 4522 return lform->obj_field(_vmentry_offset); 4523 } 4524 4525 4526 // Support for java_lang_invoke_MethodType 4527 4528 int java_lang_invoke_MethodType::_rtype_offset; 4529 int java_lang_invoke_MethodType::_ptypes_offset; 4530 4531 #define METHODTYPE_FIELDS_DO(macro) \ 4532 macro(_rtype_offset, k, "rtype", class_signature, false); \ 4533 macro(_ptypes_offset, k, "ptypes", class_array_signature, false) 4534 4535 void java_lang_invoke_MethodType::compute_offsets() { 4536 InstanceKlass* k = vmClasses::MethodType_klass(); 4537 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4538 } 4539 4540 #if INCLUDE_CDS 4541 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) { 4542 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4543 } 4544 #endif 4545 4546 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) { 4547 st->print("("); 4548 objArrayOop pts = ptypes(mt); 4549 if (pts != nullptr) { 4550 for (int i = 0, limit = pts->length(); i < limit; i++) { 4551 java_lang_Class::print_signature(pts->obj_at(i), st); 4552 } 4553 } else { 4554 st->print("null"); 4555 } 4556 st->print(")"); 4557 oop rt = rtype(mt); 4558 if (rt != nullptr) { 4559 java_lang_Class::print_signature(rt, st); 4560 } else { 4561 st->print("null"); 4562 } 4563 } 4564 4565 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) { 4566 ResourceMark rm; 4567 stringStream buffer(128); 4568 print_signature(mt, &buffer); 4569 const char* sigstr = buffer.base(); 4570 int siglen = (int) buffer.size(); 4571 Symbol *name; 4572 if (!intern_if_not_found) { 4573 name = SymbolTable::probe(sigstr, siglen); 4574 } else { 4575 name = SymbolTable::new_symbol(sigstr, siglen); 4576 } 4577 return name; 4578 } 4579 4580 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) { 4581 if (mt1 == mt2) 4582 return true; 4583 if (rtype(mt1) != rtype(mt2)) 4584 return false; 4585 if (ptype_count(mt1) != ptype_count(mt2)) 4586 return false; 4587 for (int i = ptype_count(mt1) - 1; i >= 0; i--) { 4588 if (ptype(mt1, i) != ptype(mt2, i)) 4589 return false; 4590 } 4591 return true; 4592 } 4593 4594 oop java_lang_invoke_MethodType::rtype(oop mt) { 4595 assert(is_instance(mt), "must be a MethodType"); 4596 return mt->obj_field(_rtype_offset); 4597 } 4598 4599 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) { 4600 assert(is_instance(mt), "must be a MethodType"); 4601 return (objArrayOop) mt->obj_field(_ptypes_offset); 4602 } 4603 4604 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) { 4605 return ptypes(mt)->obj_at(idx); 4606 } 4607 4608 int java_lang_invoke_MethodType::ptype_count(oop mt) { 4609 return ptypes(mt)->length(); 4610 } 4611 4612 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) { 4613 objArrayOop pts = ptypes(mt); 4614 int count = pts->length(); 4615 int slots = 0; 4616 for (int i = 0; i < count; i++) { 4617 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i)); 4618 slots += type2size[bt]; 4619 } 4620 return slots; 4621 } 4622 4623 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) { 4624 BasicType bt = java_lang_Class::as_BasicType(rtype(mt)); 4625 return type2size[bt]; 4626 } 4627 4628 4629 // Support for java_lang_invoke_CallSite 4630 4631 int java_lang_invoke_CallSite::_target_offset; 4632 int java_lang_invoke_CallSite::_context_offset; 4633 4634 #define CALLSITE_FIELDS_DO(macro) \ 4635 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \ 4636 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false) 4637 4638 void java_lang_invoke_CallSite::compute_offsets() { 4639 InstanceKlass* k = vmClasses::CallSite_klass(); 4640 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4641 } 4642 4643 #if INCLUDE_CDS 4644 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) { 4645 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4646 } 4647 #endif 4648 4649 oop java_lang_invoke_CallSite::context_no_keepalive(oop call_site) { 4650 assert(java_lang_invoke_CallSite::is_instance(call_site), ""); 4651 4652 oop dep_oop = call_site->obj_field_access<AS_NO_KEEPALIVE>(_context_offset); 4653 return dep_oop; 4654 } 4655 4656 // Support for java_lang_invoke_ConstantCallSite 4657 4658 int java_lang_invoke_ConstantCallSite::_is_frozen_offset; 4659 4660 #define CONSTANTCALLSITE_FIELDS_DO(macro) \ 4661 macro(_is_frozen_offset, k, "isFrozen", bool_signature, false) 4662 4663 void java_lang_invoke_ConstantCallSite::compute_offsets() { 4664 InstanceKlass* k = vmClasses::ConstantCallSite_klass(); 4665 CONSTANTCALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4666 } 4667 4668 #if INCLUDE_CDS 4669 void java_lang_invoke_ConstantCallSite::serialize_offsets(SerializeClosure* f) { 4670 CONSTANTCALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4671 } 4672 #endif 4673 4674 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext 4675 4676 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset; 4677 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_last_cleanup_offset; 4678 4679 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() { 4680 InstanceKlass* k = vmClasses::Context_klass(); 4681 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4682 } 4683 4684 #if INCLUDE_CDS 4685 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) { 4686 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4687 } 4688 #endif 4689 4690 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) { 4691 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), ""); 4692 nmethodBucket* volatile* vmdeps_addr = call_site->field_addr<nmethodBucket* volatile>(_vmdependencies_offset); 4693 volatile uint64_t* last_cleanup_addr = call_site->field_addr<volatile uint64_t>(_last_cleanup_offset); 4694 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr); 4695 return dep_ctx; 4696 } 4697 4698 // Support for java_security_AccessControlContext 4699 4700 int java_security_AccessControlContext::_context_offset; 4701 int java_security_AccessControlContext::_privilegedContext_offset; 4702 int java_security_AccessControlContext::_isPrivileged_offset; 4703 int java_security_AccessControlContext::_isAuthorized_offset; 4704 4705 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \ 4706 macro(_context_offset, k, "context", protectiondomain_signature, false); \ 4707 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \ 4708 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \ 4709 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false) 4710 4711 void java_security_AccessControlContext::compute_offsets() { 4712 assert(_isPrivileged_offset == 0, "offsets should be initialized only once"); 4713 InstanceKlass* k = vmClasses::AccessControlContext_klass(); 4714 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4715 } 4716 4717 #if INCLUDE_CDS 4718 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) { 4719 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4720 } 4721 #endif 4722 4723 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) { 4724 assert(_isPrivileged_offset != 0, "offsets should have been initialized"); 4725 assert(_isAuthorized_offset != 0, "offsets should have been initialized"); 4726 // Ensure klass is initialized 4727 vmClasses::AccessControlContext_klass()->initialize(CHECK_NULL); 4728 // Allocate result 4729 oop result = vmClasses::AccessControlContext_klass()->allocate_instance(CHECK_NULL); 4730 // Fill in values 4731 result->obj_field_put(_context_offset, context()); 4732 result->obj_field_put(_privilegedContext_offset, privileged_context()); 4733 result->bool_field_put(_isPrivileged_offset, isPrivileged); 4734 result->bool_field_put(_isAuthorized_offset, true); 4735 return result; 4736 } 4737 4738 4739 // Support for java_lang_ClassLoader 4740 4741 int java_lang_ClassLoader::_loader_data_offset; 4742 int java_lang_ClassLoader::_parallelCapable_offset; 4743 int java_lang_ClassLoader::_name_offset; 4744 int java_lang_ClassLoader::_nameAndId_offset; 4745 int java_lang_ClassLoader::_unnamedModule_offset; 4746 int java_lang_ClassLoader::_parent_offset; 4747 4748 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) { 4749 assert(loader != nullptr, "loader must not be null"); 4750 assert(oopDesc::is_oop(loader), "loader must be oop"); 4751 return Atomic::load_acquire(loader->field_addr<ClassLoaderData*>(_loader_data_offset)); 4752 } 4753 4754 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) { 4755 assert(loader != nullptr, "loader must not be null"); 4756 assert(oopDesc::is_oop(loader), "loader must be oop"); 4757 return *loader->field_addr<ClassLoaderData*>(_loader_data_offset); 4758 } 4759 4760 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) { 4761 assert(loader != nullptr, "loader must not be null"); 4762 assert(oopDesc::is_oop(loader), "loader must be oop"); 4763 Atomic::release_store(loader->field_addr<ClassLoaderData*>(_loader_data_offset), new_data); 4764 } 4765 4766 #define CLASSLOADER_FIELDS_DO(macro) \ 4767 macro(_parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \ 4768 macro(_name_offset, k1, vmSymbols::name_name(), string_signature, false); \ 4769 macro(_nameAndId_offset, k1, "nameAndId", string_signature, false); \ 4770 macro(_unnamedModule_offset, k1, "unnamedModule", module_signature, false); \ 4771 macro(_parent_offset, k1, "parent", classloader_signature, false) 4772 4773 void java_lang_ClassLoader::compute_offsets() { 4774 InstanceKlass* k1 = vmClasses::ClassLoader_klass(); 4775 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4776 4777 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4778 } 4779 4780 #if INCLUDE_CDS 4781 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) { 4782 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4783 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4784 } 4785 #endif 4786 4787 oop java_lang_ClassLoader::parent(oop loader) { 4788 assert(is_instance(loader), "loader must be oop"); 4789 return loader->obj_field(_parent_offset); 4790 } 4791 4792 oop java_lang_ClassLoader::parent_no_keepalive(oop loader) { 4793 assert(is_instance(loader), "loader must be oop"); 4794 return loader->obj_field_access<AS_NO_KEEPALIVE>(_parent_offset); 4795 } 4796 4797 // Returns the name field of this class loader. If the name field has not 4798 // been set, null will be returned. 4799 oop java_lang_ClassLoader::name(oop loader) { 4800 assert(is_instance(loader), "loader must be oop"); 4801 return loader->obj_field(_name_offset); 4802 } 4803 4804 // Returns the nameAndId field of this class loader. The format is 4805 // as follows: 4806 // If the defining loader has a name explicitly set then '<loader-name>' @<id> 4807 // If the defining loader has no name then <qualified-class-name> @<id> 4808 // If built-in loader, then omit '@<id>' as there is only one instance. 4809 // Use ClassLoader::loader_name_id() to obtain this String as a char*. 4810 oop java_lang_ClassLoader::nameAndId(oop loader) { 4811 assert(is_instance(loader), "loader must be oop"); 4812 return loader->obj_field(_nameAndId_offset); 4813 } 4814 4815 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) { 4816 assert(is_instance(loader), "loader must be oop"); 4817 assert(cl == nullptr || is_instance(cl), "cl argument must be oop"); 4818 oop acl = loader; 4819 debug_only(jint loop_count = 0); 4820 // This loop taken verbatim from ClassLoader.java: 4821 do { 4822 acl = parent(acl); 4823 if (cl == acl) { 4824 return true; 4825 } 4826 assert(++loop_count > 0, "loop_count overflow"); 4827 } while (acl != nullptr); 4828 return false; 4829 } 4830 4831 bool java_lang_ClassLoader::is_instance(oop obj) { 4832 return obj != nullptr && is_subclass(obj->klass()); 4833 } 4834 4835 4836 // For class loader classes, parallelCapable defined 4837 // based on non-null field 4838 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it 4839 bool java_lang_ClassLoader::parallelCapable(oop class_loader) { 4840 assert(_parallelCapable_offset != 0, "offsets should have been initialized"); 4841 return (class_loader->obj_field(_parallelCapable_offset) != nullptr); 4842 } 4843 4844 bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 4845 // Fix for 4474172; see evaluation for more details 4846 loader = non_reflection_class_loader(loader); 4847 4848 oop cl = SystemDictionary::java_system_loader(); 4849 while(cl != nullptr) { 4850 if (cl == loader) return true; 4851 cl = parent(cl); 4852 } 4853 return false; 4854 } 4855 4856 // Return true if this is one of the class loaders associated with 4857 // the generated bytecodes for serialization constructor returned 4858 // by sun.reflect.ReflectionFactory::newConstructorForSerialization 4859 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) { 4860 if (loader != nullptr) { 4861 Klass* delegating_cl_class = vmClasses::reflect_DelegatingClassLoader_klass(); 4862 // This might be null in non-1.4 JDKs 4863 return (delegating_cl_class != nullptr && loader->is_a(delegating_cl_class)); 4864 } 4865 return false; 4866 } 4867 4868 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) { 4869 // See whether this is one of the class loaders associated with 4870 // the generated bytecodes for reflection, and if so, "magically" 4871 // delegate to its parent to prevent class loading from occurring 4872 // in places where applications using reflection didn't expect it. 4873 if (is_reflection_class_loader(loader)) { 4874 return parent(loader); 4875 } 4876 return loader; 4877 } 4878 4879 oop java_lang_ClassLoader::unnamedModule(oop loader) { 4880 assert(is_instance(loader), "loader must be oop"); 4881 return loader->obj_field(_unnamedModule_offset); 4882 } 4883 4884 // Support for java_lang_System 4885 // 4886 4887 int java_lang_System::_static_in_offset; 4888 int java_lang_System::_static_out_offset; 4889 int java_lang_System::_static_err_offset; 4890 int java_lang_System::_static_security_offset; 4891 int java_lang_System::_static_allow_security_offset; 4892 int java_lang_System::_static_never_offset; 4893 4894 #define SYSTEM_FIELDS_DO(macro) \ 4895 macro(_static_in_offset, k, "in", input_stream_signature, true); \ 4896 macro(_static_out_offset, k, "out", print_stream_signature, true); \ 4897 macro(_static_err_offset, k, "err", print_stream_signature, true); \ 4898 macro(_static_security_offset, k, "security", security_manager_signature, true); \ 4899 macro(_static_allow_security_offset, k, "allowSecurityManager", int_signature, true); \ 4900 macro(_static_never_offset, k, "NEVER", int_signature, true) 4901 4902 void java_lang_System::compute_offsets() { 4903 InstanceKlass* k = vmClasses::System_klass(); 4904 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4905 } 4906 4907 // This field tells us that a security manager can never be installed so we 4908 // can completely skip populating the ProtectionDomainCacheTable. 4909 bool java_lang_System::allow_security_manager() { 4910 static int initialized = false; 4911 static bool allowed = true; // default 4912 if (!initialized) { 4913 oop base = vmClasses::System_klass()->static_field_base_raw(); 4914 int never = base->int_field(_static_never_offset); 4915 allowed = (base->int_field(_static_allow_security_offset) != never); 4916 initialized = true; 4917 } 4918 return allowed; 4919 } 4920 4921 // This field tells us that a security manager is installed. 4922 bool java_lang_System::has_security_manager() { 4923 oop base = vmClasses::System_klass()->static_field_base_raw(); 4924 return base->obj_field(_static_security_offset) != nullptr; 4925 } 4926 4927 #if INCLUDE_CDS 4928 void java_lang_System::serialize_offsets(SerializeClosure* f) { 4929 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4930 } 4931 #endif 4932 4933 // Support for jdk_internal_misc_UnsafeConstants 4934 // 4935 class UnsafeConstantsFixup : public FieldClosure { 4936 private: 4937 int _address_size; 4938 int _page_size; 4939 bool _big_endian; 4940 bool _use_unaligned_access; 4941 int _data_cache_line_flush_size; 4942 public: 4943 UnsafeConstantsFixup() { 4944 // round up values for all static final fields 4945 _address_size = sizeof(void*); 4946 _page_size = AIX_ONLY(sysconf(_SC_PAGESIZE)) NOT_AIX((int)os::vm_page_size()); 4947 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true); 4948 _use_unaligned_access = UseUnalignedAccesses; 4949 _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size(); 4950 } 4951 4952 void do_field(fieldDescriptor* fd) { 4953 oop mirror = fd->field_holder()->java_mirror(); 4954 assert(mirror != nullptr, "UnsafeConstants must have mirror already"); 4955 assert(fd->field_holder() == vmClasses::UnsafeConstants_klass(), "Should be UnsafeConstants"); 4956 assert(fd->is_final(), "fields of UnsafeConstants must be final"); 4957 assert(fd->is_static(), "fields of UnsafeConstants must be static"); 4958 if (fd->name() == vmSymbols::address_size_name()) { 4959 mirror->int_field_put(fd->offset(), _address_size); 4960 } else if (fd->name() == vmSymbols::page_size_name()) { 4961 mirror->int_field_put(fd->offset(), _page_size); 4962 } else if (fd->name() == vmSymbols::big_endian_name()) { 4963 mirror->bool_field_put(fd->offset(), _big_endian); 4964 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) { 4965 mirror->bool_field_put(fd->offset(), _use_unaligned_access); 4966 } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) { 4967 mirror->int_field_put(fd->offset(), _data_cache_line_flush_size); 4968 } else { 4969 assert(false, "unexpected UnsafeConstants field"); 4970 } 4971 } 4972 }; 4973 4974 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() { 4975 UnsafeConstantsFixup fixup; 4976 vmClasses::UnsafeConstants_klass()->do_local_static_fields(&fixup); 4977 } 4978 4979 4980 // java_lang_StackTraceElement 4981 4982 int java_lang_StackTraceElement::_methodName_offset; 4983 int java_lang_StackTraceElement::_fileName_offset; 4984 int java_lang_StackTraceElement::_lineNumber_offset; 4985 int java_lang_StackTraceElement::_moduleName_offset; 4986 int java_lang_StackTraceElement::_moduleVersion_offset; 4987 int java_lang_StackTraceElement::_classLoaderName_offset; 4988 int java_lang_StackTraceElement::_declaringClass_offset; 4989 int java_lang_StackTraceElement::_declaringClassObject_offset; 4990 4991 #define STACKTRACEELEMENT_FIELDS_DO(macro) \ 4992 macro(_declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \ 4993 macro(_classLoaderName_offset, k, "classLoaderName", string_signature, false); \ 4994 macro(_moduleName_offset, k, "moduleName", string_signature, false); \ 4995 macro(_moduleVersion_offset, k, "moduleVersion", string_signature, false); \ 4996 macro(_declaringClass_offset, k, "declaringClass", string_signature, false); \ 4997 macro(_methodName_offset, k, "methodName", string_signature, false); \ 4998 macro(_fileName_offset, k, "fileName", string_signature, false); \ 4999 macro(_lineNumber_offset, k, "lineNumber", int_signature, false) 5000 5001 // Support for java_lang_StackTraceElement 5002 void java_lang_StackTraceElement::compute_offsets() { 5003 InstanceKlass* k = vmClasses::StackTraceElement_klass(); 5004 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5005 } 5006 5007 #if INCLUDE_CDS 5008 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) { 5009 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5010 } 5011 #endif 5012 5013 void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 5014 element->obj_field_put(_fileName_offset, value); 5015 } 5016 5017 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 5018 element->obj_field_put(_declaringClass_offset, value); 5019 } 5020 5021 void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 5022 element->obj_field_put(_methodName_offset, value); 5023 } 5024 5025 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 5026 element->int_field_put(_lineNumber_offset, value); 5027 } 5028 5029 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) { 5030 element->obj_field_put(_moduleName_offset, value); 5031 } 5032 5033 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) { 5034 element->obj_field_put(_moduleVersion_offset, value); 5035 } 5036 5037 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) { 5038 element->obj_field_put(_classLoaderName_offset, value); 5039 } 5040 5041 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) { 5042 element->obj_field_put(_declaringClassObject_offset, value); 5043 } 5044 5045 5046 // java_lang_AssertionStatusDirectives 5047 5048 int java_lang_AssertionStatusDirectives::_classes_offset; 5049 int java_lang_AssertionStatusDirectives::_classEnabled_offset; 5050 int java_lang_AssertionStatusDirectives::_packages_offset; 5051 int java_lang_AssertionStatusDirectives::_packageEnabled_offset; 5052 int java_lang_AssertionStatusDirectives::_deflt_offset; 5053 5054 // Support for java Assertions - java_lang_AssertionStatusDirectives. 5055 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \ 5056 macro(_classes_offset, k, "classes", string_array_signature, false); \ 5057 macro(_classEnabled_offset, k, "classEnabled", bool_array_signature, false); \ 5058 macro(_packages_offset, k, "packages", string_array_signature, false); \ 5059 macro(_packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \ 5060 macro(_deflt_offset, k, "deflt", bool_signature, false) 5061 5062 void java_lang_AssertionStatusDirectives::compute_offsets() { 5063 InstanceKlass* k = vmClasses::AssertionStatusDirectives_klass(); 5064 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5065 } 5066 5067 #if INCLUDE_CDS 5068 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) { 5069 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5070 } 5071 #endif 5072 5073 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 5074 o->obj_field_put(_classes_offset, val); 5075 } 5076 5077 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 5078 o->obj_field_put(_classEnabled_offset, val); 5079 } 5080 5081 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 5082 o->obj_field_put(_packages_offset, val); 5083 } 5084 5085 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 5086 o->obj_field_put(_packageEnabled_offset, val); 5087 } 5088 5089 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 5090 o->bool_field_put(_deflt_offset, val); 5091 } 5092 5093 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset; 5094 5095 #define AOS_FIELDS_DO(macro) \ 5096 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false) 5097 5098 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() { 5099 InstanceKlass* k = vmClasses::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass(); 5100 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5101 } 5102 5103 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 5104 assert(_owner_offset != 0, "Must be initialized"); 5105 return obj->obj_field(_owner_offset); 5106 } 5107 5108 #if INCLUDE_CDS 5109 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) { 5110 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5111 } 5112 #endif 5113 5114 int vector_VectorPayload::_payload_offset; 5115 5116 #define VECTORPAYLOAD_FIELDS_DO(macro) \ 5117 macro(_payload_offset, k, "payload", object_signature, false) 5118 5119 void vector_VectorPayload::compute_offsets() { 5120 InstanceKlass* k = vmClasses::vector_VectorPayload_klass(); 5121 VECTORPAYLOAD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5122 } 5123 5124 #if INCLUDE_CDS 5125 void vector_VectorPayload::serialize_offsets(SerializeClosure* f) { 5126 VECTORPAYLOAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5127 } 5128 #endif 5129 5130 void vector_VectorPayload::set_payload(oop o, oop val) { 5131 o->obj_field_put(_payload_offset, val); 5132 } 5133 5134 bool vector_VectorPayload::is_instance(oop obj) { 5135 return obj != nullptr && is_subclass(obj->klass()); 5136 } 5137 5138 int java_lang_Integer_IntegerCache::_static_cache_offset; 5139 int java_lang_Long_LongCache::_static_cache_offset; 5140 int java_lang_Character_CharacterCache::_static_cache_offset; 5141 int java_lang_Short_ShortCache::_static_cache_offset; 5142 int java_lang_Byte_ByteCache::_static_cache_offset; 5143 5144 #define INTEGER_CACHE_FIELDS_DO(macro) \ 5145 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true) 5146 5147 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) { 5148 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5149 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5150 } 5151 5152 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) { 5153 oop base = ik->static_field_base_raw(); 5154 return objArrayOop(base->obj_field(_static_cache_offset)); 5155 } 5156 5157 Symbol* java_lang_Integer_IntegerCache::symbol() { 5158 return vmSymbols::java_lang_Integer_IntegerCache(); 5159 } 5160 5161 #if INCLUDE_CDS 5162 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) { 5163 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5164 } 5165 #endif 5166 #undef INTEGER_CACHE_FIELDS_DO 5167 5168 jint java_lang_Integer::value(oop obj) { 5169 jvalue v; 5170 java_lang_boxing_object::get_value(obj, &v); 5171 return v.i; 5172 } 5173 5174 #define LONG_CACHE_FIELDS_DO(macro) \ 5175 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true) 5176 5177 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) { 5178 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5179 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5180 } 5181 5182 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) { 5183 oop base = ik->static_field_base_raw(); 5184 return objArrayOop(base->obj_field(_static_cache_offset)); 5185 } 5186 5187 Symbol* java_lang_Long_LongCache::symbol() { 5188 return vmSymbols::java_lang_Long_LongCache(); 5189 } 5190 5191 #if INCLUDE_CDS 5192 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) { 5193 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5194 } 5195 #endif 5196 #undef LONG_CACHE_FIELDS_DO 5197 5198 jlong java_lang_Long::value(oop obj) { 5199 jvalue v; 5200 java_lang_boxing_object::get_value(obj, &v); 5201 return v.j; 5202 } 5203 5204 #define CHARACTER_CACHE_FIELDS_DO(macro) \ 5205 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true) 5206 5207 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) { 5208 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5209 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5210 } 5211 5212 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) { 5213 oop base = ik->static_field_base_raw(); 5214 return objArrayOop(base->obj_field(_static_cache_offset)); 5215 } 5216 5217 Symbol* java_lang_Character_CharacterCache::symbol() { 5218 return vmSymbols::java_lang_Character_CharacterCache(); 5219 } 5220 5221 #if INCLUDE_CDS 5222 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) { 5223 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5224 } 5225 #endif 5226 #undef CHARACTER_CACHE_FIELDS_DO 5227 5228 jchar java_lang_Character::value(oop obj) { 5229 jvalue v; 5230 java_lang_boxing_object::get_value(obj, &v); 5231 return v.c; 5232 } 5233 5234 #define SHORT_CACHE_FIELDS_DO(macro) \ 5235 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true) 5236 5237 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) { 5238 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5239 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5240 } 5241 5242 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) { 5243 oop base = ik->static_field_base_raw(); 5244 return objArrayOop(base->obj_field(_static_cache_offset)); 5245 } 5246 5247 Symbol* java_lang_Short_ShortCache::symbol() { 5248 return vmSymbols::java_lang_Short_ShortCache(); 5249 } 5250 5251 #if INCLUDE_CDS 5252 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) { 5253 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5254 } 5255 #endif 5256 #undef SHORT_CACHE_FIELDS_DO 5257 5258 jshort java_lang_Short::value(oop obj) { 5259 jvalue v; 5260 java_lang_boxing_object::get_value(obj, &v); 5261 return v.s; 5262 } 5263 5264 #define BYTE_CACHE_FIELDS_DO(macro) \ 5265 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true) 5266 5267 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) { 5268 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5269 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5270 } 5271 5272 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) { 5273 oop base = ik->static_field_base_raw(); 5274 return objArrayOop(base->obj_field(_static_cache_offset)); 5275 } 5276 5277 Symbol* java_lang_Byte_ByteCache::symbol() { 5278 return vmSymbols::java_lang_Byte_ByteCache(); 5279 } 5280 5281 #if INCLUDE_CDS 5282 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) { 5283 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5284 } 5285 #endif 5286 #undef BYTE_CACHE_FIELDS_DO 5287 5288 jbyte java_lang_Byte::value(oop obj) { 5289 jvalue v; 5290 java_lang_boxing_object::get_value(obj, &v); 5291 return v.b; 5292 } 5293 5294 int java_lang_Boolean::_static_TRUE_offset; 5295 int java_lang_Boolean::_static_FALSE_offset; 5296 5297 #define BOOLEAN_FIELDS_DO(macro) \ 5298 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \ 5299 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true) 5300 5301 5302 void java_lang_Boolean::compute_offsets(InstanceKlass *k) { 5303 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5304 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5305 } 5306 5307 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) { 5308 oop base = ik->static_field_base_raw(); 5309 return base->obj_field(_static_TRUE_offset); 5310 } 5311 5312 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) { 5313 oop base = ik->static_field_base_raw(); 5314 return base->obj_field(_static_FALSE_offset); 5315 } 5316 5317 Symbol* java_lang_Boolean::symbol() { 5318 return vmSymbols::java_lang_Boolean(); 5319 } 5320 5321 #if INCLUDE_CDS 5322 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) { 5323 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5324 } 5325 #endif 5326 #undef BOOLEAN_CACHE_FIELDS_DO 5327 5328 jboolean java_lang_Boolean::value(oop obj) { 5329 jvalue v; 5330 java_lang_boxing_object::get_value(obj, &v); 5331 return v.z; 5332 } 5333 5334 // java_lang_reflect_RecordComponent 5335 5336 int java_lang_reflect_RecordComponent::_clazz_offset; 5337 int java_lang_reflect_RecordComponent::_name_offset; 5338 int java_lang_reflect_RecordComponent::_type_offset; 5339 int java_lang_reflect_RecordComponent::_accessor_offset; 5340 int java_lang_reflect_RecordComponent::_signature_offset; 5341 int java_lang_reflect_RecordComponent::_annotations_offset; 5342 int java_lang_reflect_RecordComponent::_typeAnnotations_offset; 5343 5344 #define RECORDCOMPONENT_FIELDS_DO(macro) \ 5345 macro(_clazz_offset, k, "clazz", class_signature, false); \ 5346 macro(_name_offset, k, "name", string_signature, false); \ 5347 macro(_type_offset, k, "type", class_signature, false); \ 5348 macro(_accessor_offset, k, "accessor", reflect_method_signature, false); \ 5349 macro(_signature_offset, k, "signature", string_signature, false); \ 5350 macro(_annotations_offset, k, "annotations", byte_array_signature, false); \ 5351 macro(_typeAnnotations_offset, k, "typeAnnotations", byte_array_signature, false); 5352 5353 // Support for java_lang_reflect_RecordComponent 5354 void java_lang_reflect_RecordComponent::compute_offsets() { 5355 InstanceKlass* k = vmClasses::RecordComponent_klass(); 5356 RECORDCOMPONENT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5357 } 5358 5359 #if INCLUDE_CDS 5360 void java_lang_reflect_RecordComponent::serialize_offsets(SerializeClosure* f) { 5361 RECORDCOMPONENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5362 } 5363 #endif 5364 5365 void java_lang_reflect_RecordComponent::set_clazz(oop element, oop value) { 5366 element->obj_field_put(_clazz_offset, value); 5367 } 5368 5369 void java_lang_reflect_RecordComponent::set_name(oop element, oop value) { 5370 element->obj_field_put(_name_offset, value); 5371 } 5372 5373 void java_lang_reflect_RecordComponent::set_type(oop element, oop value) { 5374 element->obj_field_put(_type_offset, value); 5375 } 5376 5377 void java_lang_reflect_RecordComponent::set_accessor(oop element, oop value) { 5378 element->obj_field_put(_accessor_offset, value); 5379 } 5380 5381 void java_lang_reflect_RecordComponent::set_signature(oop element, oop value) { 5382 element->obj_field_put(_signature_offset, value); 5383 } 5384 5385 void java_lang_reflect_RecordComponent::set_annotations(oop element, oop value) { 5386 element->obj_field_put(_annotations_offset, value); 5387 } 5388 5389 void java_lang_reflect_RecordComponent::set_typeAnnotations(oop element, oop value) { 5390 element->obj_field_put(_typeAnnotations_offset, value); 5391 } 5392 5393 // java_lang_InternalError 5394 int java_lang_InternalError::_during_unsafe_access_offset; 5395 5396 void java_lang_InternalError::set_during_unsafe_access(oop internal_error) { 5397 internal_error->bool_field_put(_during_unsafe_access_offset, true); 5398 } 5399 5400 jboolean java_lang_InternalError::during_unsafe_access(oop internal_error) { 5401 return internal_error->bool_field(_during_unsafe_access_offset); 5402 } 5403 5404 void java_lang_InternalError::compute_offsets() { 5405 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 5406 } 5407 5408 #if INCLUDE_CDS 5409 void java_lang_InternalError::serialize_offsets(SerializeClosure* f) { 5410 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 5411 } 5412 #endif 5413 5414 #define BASIC_JAVA_CLASSES_DO_PART1(f) \ 5415 f(java_lang_Class) \ 5416 f(java_lang_String) \ 5417 f(java_lang_ref_Reference) \ 5418 //end 5419 5420 #define BASIC_JAVA_CLASSES_DO_PART2(f) \ 5421 f(java_lang_System) \ 5422 f(java_lang_ClassLoader) \ 5423 f(java_lang_Throwable) \ 5424 f(java_lang_Thread) \ 5425 f(java_lang_Thread_FieldHolder) \ 5426 f(java_lang_Thread_Constants) \ 5427 f(java_lang_ThreadGroup) \ 5428 f(java_lang_VirtualThread) \ 5429 f(java_lang_InternalError) \ 5430 f(java_lang_AssertionStatusDirectives) \ 5431 f(java_lang_ref_SoftReference) \ 5432 f(java_lang_invoke_MethodHandle) \ 5433 f(java_lang_invoke_DirectMethodHandle) \ 5434 f(java_lang_invoke_MemberName) \ 5435 f(java_lang_invoke_ResolvedMethodName) \ 5436 f(java_lang_invoke_LambdaForm) \ 5437 f(java_lang_invoke_MethodType) \ 5438 f(java_lang_invoke_CallSite) \ 5439 f(java_lang_invoke_ConstantCallSite) \ 5440 f(java_lang_invoke_MethodHandleNatives_CallSiteContext) \ 5441 f(java_security_AccessControlContext) \ 5442 f(java_lang_reflect_AccessibleObject) \ 5443 f(java_lang_reflect_Method) \ 5444 f(java_lang_reflect_Constructor) \ 5445 f(java_lang_reflect_Field) \ 5446 f(java_lang_reflect_RecordComponent) \ 5447 f(reflect_ConstantPool) \ 5448 f(java_lang_reflect_Parameter) \ 5449 f(java_lang_Module) \ 5450 f(java_lang_StackTraceElement) \ 5451 f(java_lang_ClassFrameInfo) \ 5452 f(java_lang_StackFrameInfo) \ 5453 f(java_lang_LiveStackFrameInfo) \ 5454 f(jdk_internal_vm_ContinuationScope) \ 5455 f(jdk_internal_vm_Continuation) \ 5456 f(jdk_internal_vm_StackChunk) \ 5457 f(java_util_concurrent_locks_AbstractOwnableSynchronizer) \ 5458 f(jdk_internal_foreign_abi_NativeEntryPoint) \ 5459 f(jdk_internal_foreign_abi_ABIDescriptor) \ 5460 f(jdk_internal_foreign_abi_VMStorage) \ 5461 f(jdk_internal_foreign_abi_CallConv) \ 5462 f(jdk_internal_misc_UnsafeConstants) \ 5463 f(java_lang_boxing_object) \ 5464 f(vector_VectorPayload) \ 5465 //end 5466 5467 #define BASIC_JAVA_CLASSES_DO(f) \ 5468 BASIC_JAVA_CLASSES_DO_PART1(f) \ 5469 BASIC_JAVA_CLASSES_DO_PART2(f) 5470 5471 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets(); 5472 5473 // Compute field offsets of all the classes in this file 5474 void JavaClasses::compute_offsets() { 5475 if (CDSConfig::is_using_archive()) { 5476 JVMTI_ONLY(assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() && 5477 JvmtiExport::has_early_class_hook_env()), 5478 "JavaClasses::compute_offsets() must be called in early JVMTI phase.")); 5479 // None of the classes used by the rest of this function can be replaced by 5480 // JVMTI ClassFileLoadHook. 5481 // We are safe to use the archived offsets, which have already been restored 5482 // by JavaClasses::serialize_offsets, without computing the offsets again. 5483 return; 5484 } 5485 5486 // We have already called the compute_offsets() of the 5487 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String, java_lang_Class and 5488 // java_lang_ref_Reference) earlier inside vmClasses::resolve_all() 5489 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS); 5490 } 5491 5492 #if INCLUDE_CDS 5493 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc); 5494 5495 void JavaClasses::serialize_offsets(SerializeClosure* soc) { 5496 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS); 5497 } 5498 #endif 5499 5500 #if INCLUDE_CDS_JAVA_HEAP 5501 bool JavaClasses::is_supported_for_archiving(oop obj) { 5502 Klass* klass = obj->klass(); 5503 5504 if (klass == vmClasses::ClassLoader_klass() || // ClassLoader::loader_data is malloc'ed. 5505 // The next 3 classes are used to implement java.lang.invoke, and are not used directly in 5506 // regular Java code. The implementation of java.lang.invoke uses generated hidden classes 5507 // (e.g., as referenced by ResolvedMethodName::vmholder) that are not yet supported by CDS. 5508 // So for now we cannot not support these classes for archiving. 5509 // 5510 // These objects typically are not referenced by static fields, but rather by resolved 5511 // constant pool entries, so excluding them shouldn't affect the archiving of static fields. 5512 klass == vmClasses::ResolvedMethodName_klass() || 5513 klass == vmClasses::MemberName_klass() || 5514 klass == vmClasses::Context_klass() || 5515 // It's problematic to archive Reference objects. One of the reasons is that 5516 // Reference::discovered may pull in unwanted objects (see JDK-8284336) 5517 klass->is_subclass_of(vmClasses::Reference_klass())) { 5518 return false; 5519 } 5520 5521 return true; 5522 } 5523 #endif 5524 5525 #ifndef PRODUCT 5526 5527 // These functions exist to assert the validity of de-serialized offsets in boxing object as a sanity check. 5528 5529 bool JavaClasses::check_offset(const char *klass_name, int deserialized_offset, const char *field_name, 5530 const char* field_sig) { 5531 EXCEPTION_MARK; 5532 fieldDescriptor fd; 5533 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name); 5534 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 5535 InstanceKlass* ik = InstanceKlass::cast(k); 5536 TempNewSymbol f_name = SymbolTable::new_symbol(field_name); 5537 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig); 5538 if (!ik->find_local_field(f_name, f_sig, &fd)) { 5539 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 5540 return false; 5541 } 5542 if (fd.is_static()) { 5543 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 5544 return false; 5545 } 5546 if (fd.offset() == deserialized_offset ) { 5547 return true; 5548 } else { 5549 tty->print_cr("Offset of nonstatic field %s.%s is deserialized as %d but should really be %d.", 5550 klass_name, field_name, deserialized_offset, fd.offset()); 5551 return false; 5552 } 5553 } 5554 5555 void JavaClasses::check_offsets() { 5556 bool valid = true; 5557 5558 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 5559 valid &= check_offset(klass_name, cpp_klass_name :: _##field_name ## _offset, #field_name, field_sig) 5560 5561 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 5562 valid &= check_offset(klass_name, cpp_klass_name :: _##long_ ## field_name ## _offset, #field_name, field_sig) 5563 5564 // Boxed primitive objects (java_lang_boxing_object) 5565 5566 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 5567 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 5568 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 5569 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 5570 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 5571 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 5572 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 5573 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 5574 5575 if (!valid) vm_exit_during_initialization("Field offset verification failed"); 5576 } 5577 5578 #endif // PRODUCT 5579 5580 int InjectedField::compute_offset() { 5581 InstanceKlass* ik = InstanceKlass::cast(klass()); 5582 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 5583 if (!may_be_java && !fs.field_flags().is_injected()) { 5584 // Only look at injected fields 5585 continue; 5586 } 5587 if (fs.name() == name() && fs.signature() == signature()) { 5588 return fs.offset(); 5589 } 5590 } 5591 ResourceMark rm; 5592 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)" : ""); 5593 #ifndef PRODUCT 5594 ik->print(); 5595 tty->print_cr("all fields:"); 5596 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 5597 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 5598 } 5599 #endif //PRODUCT 5600 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class"); 5601 return -1; 5602 } 5603 5604 void javaClasses_init() { 5605 JavaClasses::compute_offsets(); 5606 JavaClasses::check_offsets(); 5607 FilteredFieldsMap::initialize(); // must be done after computing offsets. 5608 }