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 char* expected = UNICODE::as_utf8(unicode, length); 308 char* actual = as_utf8_string(h_obj()); 309 if (strcmp(expected, actual) != 0) { 310 fatal("Unicode conversion failure: %s --> %s", expected, actual); 311 } 312 } 313 #endif 314 315 return h_obj; 316 } 317 318 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) { 319 Handle h_obj = create_from_unicode(unicode, length, CHECK_NULL); 320 return h_obj(); 321 } 322 323 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) { 324 if (utf8_str == nullptr) { 325 return Handle(); 326 } 327 bool has_multibyte, is_latin1; 328 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte); 329 if (!CompactStrings) { 330 has_multibyte = true; 331 is_latin1 = false; 332 } 333 334 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 335 if (length > 0) { 336 if (!has_multibyte) { 337 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str); 338 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length); 339 } else if (is_latin1) { 340 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 341 } else { 342 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 343 } 344 } 345 346 #ifdef ASSERT 347 // This check is too strict when the input string is not a valid UTF8. 348 // For example, it may be created with arbitrary content via jni_NewStringUTF. 349 if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, (int)strlen(utf8_str), false)) { 350 ResourceMark rm; 351 const char* expected = utf8_str; 352 char* actual = as_utf8_string(h_obj()); 353 if (strcmp(expected, actual) != 0) { 354 fatal("String conversion failure: %s --> %s", expected, actual); 355 } 356 } 357 #endif 358 359 return h_obj; 360 } 361 362 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) { 363 Handle h_obj = create_from_str(utf8_str, CHECK_NULL); 364 return h_obj(); 365 } 366 367 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) { 368 const char* utf8_str = (char*)symbol->bytes(); 369 int utf8_len = symbol->utf8_length(); 370 371 bool has_multibyte, is_latin1; 372 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte); 373 if (!CompactStrings) { 374 has_multibyte = true; 375 is_latin1 = false; 376 } 377 378 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 379 if (length > 0) { 380 if (!has_multibyte) { 381 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str); 382 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length); 383 } else if (is_latin1) { 384 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 385 } else { 386 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 387 } 388 } 389 390 #ifdef ASSERT 391 { 392 ResourceMark rm; 393 const char* expected = symbol->as_utf8(); 394 char* actual = as_utf8_string(h_obj()); 395 if (strncmp(expected, actual, utf8_len) != 0) { 396 fatal("Symbol conversion failure: %s --> %s", expected, actual); 397 } 398 } 399 #endif 400 401 return h_obj; 402 } 403 404 // Converts a C string to a Java String based on current encoding 405 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) { 406 assert(str != nullptr, "bad arguments"); 407 408 typedef jstring (JNICALL *to_java_string_fn_t)(JNIEnv*, const char *); 409 static to_java_string_fn_t _to_java_string_fn = nullptr; 410 411 if (_to_java_string_fn == nullptr) { 412 void *lib_handle = os::native_java_library(); 413 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "JNU_NewStringPlatform")); 414 #if defined(_WIN32) && !defined(_WIN64) 415 if (_to_java_string_fn == nullptr) { 416 // On 32 bit Windows, also try __stdcall decorated name 417 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "_JNU_NewStringPlatform@8")); 418 } 419 #endif 420 if (_to_java_string_fn == nullptr) { 421 fatal("JNU_NewStringPlatform missing"); 422 } 423 } 424 425 jstring js = nullptr; 426 { 427 JavaThread* thread = THREAD; 428 HandleMark hm(thread); 429 ThreadToNativeFromVM ttn(thread); 430 js = (_to_java_string_fn)(thread->jni_environment(), str); 431 } 432 433 Handle native_platform_string(THREAD, JNIHandles::resolve(js)); 434 JNIHandles::destroy_local(js); // destroy local JNIHandle. 435 return native_platform_string; 436 } 437 438 // Converts a Java String to a native C string that can be used for 439 // native OS calls. 440 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) { 441 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*); 442 static to_platform_string_fn_t _to_platform_string_fn = nullptr; 443 444 if (_to_platform_string_fn == nullptr) { 445 void *lib_handle = os::native_java_library(); 446 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars")); 447 if (_to_platform_string_fn == nullptr) { 448 fatal("GetStringPlatformChars missing"); 449 } 450 } 451 452 char *native_platform_string; 453 jstring js; 454 { JavaThread* thread = THREAD; 455 js = (jstring) JNIHandles::make_local(thread, java_string()); 456 HandleMark hm(thread); 457 ThreadToNativeFromVM ttn(thread); 458 JNIEnv *env = thread->jni_environment(); 459 bool is_copy; 460 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy); 461 assert(is_copy == JNI_TRUE, "is_copy value changed"); 462 } 463 464 // Uses a store barrier and therefore needs to be in vm state 465 JNIHandles::destroy_local(js); 466 467 return native_platform_string; 468 } 469 470 Handle java_lang_String::externalize_classname(Symbol* java_name, TRAPS) { 471 ResourceMark rm(THREAD); 472 return create_from_str(java_name->as_klass_external_name(), THREAD); 473 } 474 475 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) { 476 jchar* result = as_unicode_string_or_null(java_string, length); 477 if (result == nullptr) { 478 THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string"); 479 } 480 return result; 481 } 482 483 jchar* java_lang_String::as_unicode_string_or_null(oop java_string, int& length) { 484 typeArrayOop value = java_lang_String::value(java_string); 485 length = java_lang_String::length(java_string, value); 486 bool is_latin1 = java_lang_String::is_latin1(java_string); 487 488 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length); 489 if (result != nullptr) { 490 if (!is_latin1) { 491 for (int index = 0; index < length; index++) { 492 result[index] = value->char_at(index); 493 } 494 } else { 495 for (int index = 0; index < length; index++) { 496 result[index] = ((jchar) value->byte_at(index)) & 0xff; 497 } 498 } 499 } 500 return result; 501 } 502 503 inline unsigned int java_lang_String::hash_code_impl(oop java_string, bool update) { 504 // The hash and hashIsZero fields are subject to a benign data race, 505 // making it crucial to ensure that any observable result of the 506 // calculation in this method stays correct under any possible read of 507 // these fields. Necessary restrictions to allow this to be correct 508 // without explicit memory fences or similar concurrency primitives is 509 // that we can ever only write to one of these two fields for a given 510 // String instance, and that the computation is idempotent and derived 511 // from immutable state 512 assert(_initialized && (_hash_offset > 0) && (_hashIsZero_offset > 0), "Must be initialized"); 513 if (java_lang_String::hash_is_set(java_string)) { 514 return java_string->int_field(_hash_offset); 515 } 516 517 typeArrayOop value = java_lang_String::value(java_string); 518 int length = java_lang_String::length(java_string, value); 519 bool is_latin1 = java_lang_String::is_latin1(java_string); 520 521 unsigned int hash = 0; 522 if (length > 0) { 523 if (is_latin1) { 524 hash = java_lang_String::hash_code(value->byte_at_addr(0), length); 525 } else { 526 hash = java_lang_String::hash_code(value->char_at_addr(0), length); 527 } 528 } 529 530 if (update) { 531 if (hash != 0) { 532 java_string->int_field_put(_hash_offset, hash); 533 } else { 534 java_string->bool_field_put(_hashIsZero_offset, true); 535 } 536 } 537 return hash; 538 } 539 540 unsigned int java_lang_String::hash_code(oop java_string) { 541 return hash_code_impl(java_string, /*update=*/true); 542 } 543 544 unsigned int java_lang_String::hash_code_noupdate(oop java_string) { 545 return hash_code_impl(java_string, /*update=*/false); 546 } 547 548 549 char* java_lang_String::as_quoted_ascii(oop java_string) { 550 typeArrayOop value = java_lang_String::value(java_string); 551 int length = java_lang_String::length(java_string, value); 552 bool is_latin1 = java_lang_String::is_latin1(java_string); 553 554 if (length == 0) return nullptr; 555 556 char* result; 557 int result_length; 558 if (!is_latin1) { 559 jchar* base = value->char_at_addr(0); 560 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 561 result = NEW_RESOURCE_ARRAY(char, result_length); 562 UNICODE::as_quoted_ascii(base, length, result, result_length); 563 } else { 564 jbyte* base = value->byte_at_addr(0); 565 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 566 result = NEW_RESOURCE_ARRAY(char, result_length); 567 UNICODE::as_quoted_ascii(base, length, result, result_length); 568 } 569 assert(result_length >= length + 1, "must not be shorter"); 570 assert(result_length == (int)strlen(result) + 1, "must match"); 571 return result; 572 } 573 574 Symbol* java_lang_String::as_symbol(oop java_string) { 575 typeArrayOop value = java_lang_String::value(java_string); 576 int length = java_lang_String::length(java_string, value); 577 bool is_latin1 = java_lang_String::is_latin1(java_string); 578 if (!is_latin1) { 579 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0); 580 Symbol* sym = SymbolTable::new_symbol(base, length); 581 return sym; 582 } else { 583 ResourceMark rm; 584 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0); 585 const char* base = UNICODE::as_utf8(position, length); 586 Symbol* sym = SymbolTable::new_symbol(base, length); 587 return sym; 588 } 589 } 590 591 Symbol* java_lang_String::as_symbol_or_null(oop java_string) { 592 typeArrayOop value = java_lang_String::value(java_string); 593 int length = java_lang_String::length(java_string, value); 594 bool is_latin1 = java_lang_String::is_latin1(java_string); 595 if (!is_latin1) { 596 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0); 597 return SymbolTable::probe_unicode(base, length); 598 } else { 599 ResourceMark rm; 600 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0); 601 const char* base = UNICODE::as_utf8(position, length); 602 return SymbolTable::probe(base, length); 603 } 604 } 605 606 int java_lang_String::utf8_length(oop java_string, typeArrayOop value) { 607 assert(value_equals(value, java_lang_String::value(java_string)), 608 "value must be same as java_lang_String::value(java_string)"); 609 int length = java_lang_String::length(java_string, value); 610 if (length == 0) { 611 return 0; 612 } 613 if (!java_lang_String::is_latin1(java_string)) { 614 return UNICODE::utf8_length(value->char_at_addr(0), length); 615 } else { 616 return UNICODE::utf8_length(value->byte_at_addr(0), length); 617 } 618 } 619 620 int java_lang_String::utf8_length(oop java_string) { 621 typeArrayOop value = java_lang_String::value(java_string); 622 return utf8_length(java_string, value); 623 } 624 625 char* java_lang_String::as_utf8_string(oop java_string) { 626 int length; 627 return as_utf8_string(java_string, length); 628 } 629 630 char* java_lang_String::as_utf8_string(oop java_string, int& length) { 631 typeArrayOop value = java_lang_String::value(java_string); 632 length = java_lang_String::length(java_string, value); 633 bool is_latin1 = java_lang_String::is_latin1(java_string); 634 if (!is_latin1) { 635 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0); 636 return UNICODE::as_utf8(position, length); 637 } else { 638 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0); 639 return UNICODE::as_utf8(position, length); 640 } 641 } 642 643 // Uses a provided buffer if it's sufficiently large, otherwise allocates 644 // a resource array to fit 645 char* java_lang_String::as_utf8_string_full(oop java_string, char* buf, int buflen, int& utf8_len) { 646 typeArrayOop value = java_lang_String::value(java_string); 647 int len = java_lang_String::length(java_string, value); 648 bool is_latin1 = java_lang_String::is_latin1(java_string); 649 if (!is_latin1) { 650 jchar *position = (len == 0) ? nullptr : value->char_at_addr(0); 651 utf8_len = UNICODE::utf8_length(position, len); 652 if (utf8_len >= buflen) { 653 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1); 654 } 655 return UNICODE::as_utf8(position, len, buf, utf8_len + 1); 656 } else { 657 jbyte *position = (len == 0) ? nullptr : value->byte_at_addr(0); 658 utf8_len = UNICODE::utf8_length(position, len); 659 if (utf8_len >= buflen) { 660 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1); 661 } 662 return UNICODE::as_utf8(position, len, buf, utf8_len + 1); 663 } 664 } 665 666 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, int buflen) { 667 assert(value_equals(value, java_lang_String::value(java_string)), 668 "value must be same as java_lang_String::value(java_string)"); 669 int length = java_lang_String::length(java_string, value); 670 bool is_latin1 = java_lang_String::is_latin1(java_string); 671 if (!is_latin1) { 672 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0); 673 return UNICODE::as_utf8(position, length, buf, buflen); 674 } else { 675 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0); 676 return UNICODE::as_utf8(position, length, buf, buflen); 677 } 678 } 679 680 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) { 681 typeArrayOop value = java_lang_String::value(java_string); 682 return as_utf8_string(java_string, value, buf, buflen); 683 } 684 685 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) { 686 typeArrayOop value = java_lang_String::value(java_string); 687 bool is_latin1 = java_lang_String::is_latin1(java_string); 688 assert(start + len <= java_lang_String::length(java_string), "just checking"); 689 if (!is_latin1) { 690 jchar* position = value->char_at_addr(start); 691 return UNICODE::as_utf8(position, len); 692 } else { 693 jbyte* position = value->byte_at_addr(start); 694 return UNICODE::as_utf8(position, len); 695 } 696 } 697 698 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, int buflen) { 699 assert(value_equals(value, java_lang_String::value(java_string)), 700 "value must be same as java_lang_String::value(java_string)"); 701 assert(start + len <= java_lang_String::length(java_string), "just checking"); 702 bool is_latin1 = java_lang_String::is_latin1(java_string); 703 if (!is_latin1) { 704 jchar* position = value->char_at_addr(start); 705 return UNICODE::as_utf8(position, len, buf, buflen); 706 } else { 707 jbyte* position = value->byte_at_addr(start); 708 return UNICODE::as_utf8(position, len, buf, buflen); 709 } 710 } 711 712 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) { 713 assert(java_string->klass() == vmClasses::String_klass(), 714 "must be java_string"); 715 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 716 int length = java_lang_String::length(java_string, value); 717 if (length != len) { 718 return false; 719 } 720 bool is_latin1 = java_lang_String::is_latin1(java_string); 721 if (!is_latin1) { 722 for (int i = 0; i < len; i++) { 723 if (value->char_at(i) != chars[i]) { 724 return false; 725 } 726 } 727 } else { 728 for (int i = 0; i < len; i++) { 729 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) { 730 return false; 731 } 732 } 733 } 734 return true; 735 } 736 737 bool java_lang_String::equals(oop str1, oop str2) { 738 assert(str1->klass() == vmClasses::String_klass(), 739 "must be java String"); 740 assert(str2->klass() == vmClasses::String_klass(), 741 "must be java String"); 742 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1); 743 bool is_latin1 = java_lang_String::is_latin1(str1); 744 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2); 745 bool is_latin2 = java_lang_String::is_latin1(str2); 746 747 if (is_latin1 != is_latin2) { 748 // Strings with different coders are never equal. 749 return false; 750 } 751 return value_equals(value1, value2); 752 } 753 754 // Print the given string to the given outputStream, limiting the output to 755 // at most max_length of the string's characters. If the length exceeds the 756 // limit we print an abridged version of the string with the "middle" elided 757 // and replaced by " ... (N characters ommitted) ... ". If max_length is odd 758 // it is treated as max_length-1. 759 void java_lang_String::print(oop java_string, outputStream* st, int max_length) { 760 assert(java_string->klass() == vmClasses::String_klass(), "must be java_string"); 761 // We need at least two characters to print A ... B 762 assert(max_length > 1, "invalid max_length: %d", max_length); 763 764 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 765 766 if (value == nullptr) { 767 // This can happen if, e.g., printing a String 768 // object before its initializer has been called 769 st->print("nullptr"); 770 return; 771 } 772 773 int length = java_lang_String::length(java_string, value); 774 bool is_latin1 = java_lang_String::is_latin1(java_string); 775 776 bool abridge = length > max_length; 777 778 st->print("\""); 779 for (int index = 0; index < length; index++) { 780 // If we need to abridge and we've printed half the allowed characters 781 // then jump to the tail of the string. 782 if (abridge && index >= max_length / 2) { 783 st->print(" ... (%d characters ommitted) ... ", length - 2 * (max_length / 2)); 784 index = length - (max_length / 2); 785 abridge = false; // only do this once 786 } 787 jchar c = (!is_latin1) ? value->char_at(index) : 788 ((jchar) value->byte_at(index)) & 0xff; 789 if (c < ' ') { 790 st->print("\\x%02X", c); // print control characters e.g. \x0A 791 } else { 792 st->print("%c", c); 793 } 794 } 795 st->print("\""); 796 797 if (length > max_length) { 798 st->print(" (abridged) "); 799 } 800 } 801 802 // java_lang_Class 803 804 int java_lang_Class::_klass_offset; 805 int java_lang_Class::_array_klass_offset; 806 int java_lang_Class::_oop_size_offset; 807 int java_lang_Class::_static_oop_field_count_offset; 808 int java_lang_Class::_class_loader_offset; 809 int java_lang_Class::_module_offset; 810 int java_lang_Class::_protection_domain_offset; 811 int java_lang_Class::_component_mirror_offset; 812 int java_lang_Class::_init_lock_offset; 813 int java_lang_Class::_signers_offset; 814 int java_lang_Class::_name_offset; 815 int java_lang_Class::_source_file_offset; 816 int java_lang_Class::_classData_offset; 817 int java_lang_Class::_classRedefinedCount_offset; 818 819 bool java_lang_Class::_offsets_computed = false; 820 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = nullptr; 821 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = nullptr; 822 823 #ifdef ASSERT 824 inline static void assert_valid_static_string_field(fieldDescriptor* fd) { 825 assert(fd->has_initial_value(), "caller should have checked this"); 826 assert(fd->field_type() == T_OBJECT, "caller should have checked this"); 827 assert(fd->signature() == vmSymbols::string_signature(), "just checking"); 828 } 829 #endif 830 831 static void initialize_static_string_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 832 DEBUG_ONLY(assert_valid_static_string_field(fd);) 833 oop string = fd->string_initial_value(CHECK); 834 mirror()->obj_field_put(fd->offset(), string); 835 } 836 837 static void initialize_static_primitive_field(fieldDescriptor* fd, Handle mirror) { 838 assert(fd->has_initial_value(), "caller should have checked this"); 839 BasicType t = fd->field_type(); 840 switch (t) { 841 case T_BYTE: 842 mirror()->byte_field_put(fd->offset(), (jbyte)(fd->int_initial_value())); 843 break; 844 case T_BOOLEAN: 845 mirror()->bool_field_put(fd->offset(), (jboolean)(fd->int_initial_value())); 846 break; 847 case T_CHAR: 848 mirror()->char_field_put(fd->offset(), (jchar)(fd->int_initial_value())); 849 break; 850 case T_SHORT: 851 mirror()->short_field_put(fd->offset(), (jshort)(fd->int_initial_value())); 852 break; 853 case T_INT: 854 mirror()->int_field_put(fd->offset(), fd->int_initial_value()); 855 break; 856 case T_FLOAT: 857 mirror()->float_field_put(fd->offset(), fd->float_initial_value()); 858 break; 859 case T_DOUBLE: 860 mirror()->double_field_put(fd->offset(), fd->double_initial_value()); 861 break; 862 case T_LONG: 863 mirror()->long_field_put(fd->offset(), fd->long_initial_value()); 864 break; 865 default: 866 // Illegal ConstantValue attribute in class file should have been 867 // caught during classfile parsing. 868 ShouldNotReachHere(); 869 } 870 } 871 872 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 873 assert(mirror.not_null() && fd->is_static(), "just checking"); 874 if (fd->has_initial_value()) { 875 if (fd->field_type() != T_OBJECT) { 876 initialize_static_primitive_field(fd, mirror); 877 } else { 878 initialize_static_string_field(fd, mirror, CHECK); 879 } 880 } 881 } 882 883 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) { 884 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already"); 885 886 // If the offset was read from the shared archive, it was fixed up already 887 if (!k->is_shared()) { 888 if (k->is_instance_klass()) { 889 // During bootstrap, java.lang.Class wasn't loaded so static field 890 // offsets were computed without the size added it. Go back and 891 // update all the static field offsets to included the size. 892 893 // Unfortunately, the FieldInfo stream is encoded with UNSIGNED5 which doesn't allow 894 // content updates. So the FieldInfo stream has to be decompressed into a temporary array, 895 // static fields offsets are updated in this array before reencoding everything into 896 // a new UNSIGNED5 stream, and substitute it to the old FieldInfo stream. 897 898 int java_fields; 899 int injected_fields; 900 InstanceKlass* ik = InstanceKlass::cast(k); 901 GrowableArray<FieldInfo>* fields = 902 FieldInfoStream::create_FieldInfoArray(ik->fieldinfo_stream(), 903 &java_fields, &injected_fields); 904 for (int i = 0; i < fields->length(); i++) { 905 FieldInfo* fi = fields->adr_at(i); 906 if (fi->access_flags().is_static()) { 907 fi->set_offset(fi->offset() + InstanceMirrorKlass::offset_of_static_fields()); 908 } 909 } 910 Array<u1>* old_stream = ik->fieldinfo_stream(); 911 assert(fields->length() == (java_fields + injected_fields), "Must be"); 912 Array<u1>* new_fis = FieldInfoStream::create_FieldInfoStream(fields, java_fields, injected_fields, k->class_loader_data(), CHECK); 913 ik->set_fieldinfo_stream(new_fis); 914 MetadataFactory::free_array<u1>(k->class_loader_data(), old_stream); 915 } 916 } 917 918 if (k->is_shared() && k->has_archived_mirror_index()) { 919 if (ArchiveHeapLoader::is_in_use()) { 920 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK); 921 assert(present, "Missing archived mirror for %s", k->external_name()); 922 return; 923 } else { 924 k->clear_java_mirror_handle(); 925 k->clear_archived_mirror_index(); 926 } 927 } 928 create_mirror(k, Handle(), Handle(), Handle(), Handle(), CHECK); 929 } 930 931 void java_lang_Class::initialize_mirror_fields(Klass* k, 932 Handle mirror, 933 Handle protection_domain, 934 Handle classData, 935 TRAPS) { 936 // Allocate a simple java object for a lock. 937 // This needs to be a java object because during class initialization 938 // it can be held across a java call. 939 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK); 940 set_init_lock(mirror(), r); 941 942 // Set protection domain also 943 set_protection_domain(mirror(), protection_domain()); 944 945 // Initialize static fields 946 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK); 947 948 // Set classData 949 set_class_data(mirror(), classData()); 950 } 951 952 // Set the java.lang.Module module field in the java_lang_Class mirror 953 void java_lang_Class::set_mirror_module_field(JavaThread* current, Klass* k, Handle mirror, Handle module) { 954 if (module.is_null()) { 955 // During startup, the module may be null only if java.base has not been defined yet. 956 // Put the class on the fixup_module_list to patch later when the java.lang.Module 957 // for java.base is known. But note that since we captured the null module another 958 // thread may have completed that initialization. 959 960 bool javabase_was_defined = false; 961 { 962 MutexLocker m1(current, Module_lock); 963 // Keep list of classes needing java.base module fixup 964 if (!ModuleEntryTable::javabase_defined()) { 965 assert(k->java_mirror() != nullptr, "Class's mirror is null"); 966 k->class_loader_data()->inc_keep_alive(); 967 assert(fixup_module_field_list() != nullptr, "fixup_module_field_list not initialized"); 968 fixup_module_field_list()->push(k); 969 } else { 970 javabase_was_defined = true; 971 } 972 } 973 974 // If java.base was already defined then patch this particular class with java.base. 975 if (javabase_was_defined) { 976 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry(); 977 assert(javabase_entry != nullptr && javabase_entry->module() != nullptr, 978 "Setting class module field, " JAVA_BASE_NAME " should be defined"); 979 Handle javabase_handle(current, javabase_entry->module()); 980 set_module(mirror(), javabase_handle()); 981 } 982 } else { 983 assert(Universe::is_module_initialized() || 984 (ModuleEntryTable::javabase_defined() && 985 (module() == ModuleEntryTable::javabase_moduleEntry()->module())), 986 "Incorrect java.lang.Module specification while creating mirror"); 987 set_module(mirror(), module()); 988 } 989 } 990 991 // Statically allocate fixup lists because they always get created. 992 void java_lang_Class::allocate_fixup_lists() { 993 GrowableArray<Klass*>* mirror_list = 994 new (mtClass) GrowableArray<Klass*>(40, mtClass); 995 set_fixup_mirror_list(mirror_list); 996 997 GrowableArray<Klass*>* module_list = 998 new (mtModule) GrowableArray<Klass*>(500, mtModule); 999 set_fixup_module_field_list(module_list); 1000 } 1001 1002 void java_lang_Class::allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData, 1003 Handle& mirror, Handle& comp_mirror, TRAPS) { 1004 // Allocate mirror (java.lang.Class instance) 1005 oop mirror_oop = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(k, CHECK); 1006 mirror = Handle(THREAD, mirror_oop); 1007 1008 // Setup indirection from mirror->klass 1009 set_klass(mirror(), k); 1010 1011 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass()); 1012 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set"); 1013 1014 set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror())); 1015 1016 // It might also have a component mirror. This mirror must already exist. 1017 if (k->is_array_klass()) { 1018 if (k->is_typeArray_klass()) { 1019 BasicType type = TypeArrayKlass::cast(k)->element_type(); 1020 if (is_scratch) { 1021 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(type)); 1022 } else { 1023 comp_mirror = Handle(THREAD, Universe::java_mirror(type)); 1024 } 1025 } else { 1026 assert(k->is_objArray_klass(), "Must be"); 1027 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass(); 1028 assert(element_klass != nullptr, "Must have an element klass"); 1029 if (is_scratch) { 1030 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass)); 1031 } else { 1032 comp_mirror = Handle(THREAD, element_klass->java_mirror()); 1033 } 1034 } 1035 assert(comp_mirror() != nullptr, "must have a mirror"); 1036 1037 // Two-way link between the array klass and its component mirror: 1038 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k 1039 set_component_mirror(mirror(), comp_mirror()); 1040 // See below for ordering dependencies between field array_klass in component mirror 1041 // and java_mirror in this klass. 1042 } else { 1043 assert(k->is_instance_klass(), "Must be"); 1044 1045 initialize_mirror_fields(k, mirror, protection_domain, classData, THREAD); 1046 if (HAS_PENDING_EXCEPTION) { 1047 // If any of the fields throws an exception like OOM remove the klass field 1048 // from the mirror so GC doesn't follow it after the klass has been deallocated. 1049 // This mirror looks like a primitive type, which logically it is because it 1050 // it represents no class. 1051 set_klass(mirror(), nullptr); 1052 return; 1053 } 1054 } 1055 } 1056 1057 void java_lang_Class::create_mirror(Klass* k, Handle class_loader, 1058 Handle module, Handle protection_domain, 1059 Handle classData, TRAPS) { 1060 assert(k != nullptr, "Use create_basic_type_mirror for primitive types"); 1061 assert(k->java_mirror() == nullptr, "should only assign mirror once"); 1062 1063 // Use this moment of initialization to cache modifier_flags also, 1064 // to support Class.getModifiers(). Instance classes recalculate 1065 // the cached flags after the class file is parsed, but before the 1066 // class is put into the system dictionary. 1067 int computed_modifiers = k->compute_modifier_flags(); 1068 k->set_modifier_flags(computed_modifiers); 1069 // Class_klass has to be loaded because it is used to allocate 1070 // the mirror. 1071 if (vmClasses::Class_klass_loaded()) { 1072 Handle mirror; 1073 Handle comp_mirror; 1074 1075 allocate_mirror(k, /*is_scratch=*/false, protection_domain, classData, mirror, comp_mirror, CHECK); 1076 1077 // set the classLoader field in the java_lang_Class instance 1078 assert(class_loader() == k->class_loader(), "should be same"); 1079 set_class_loader(mirror(), class_loader()); 1080 1081 // Setup indirection from klass->mirror 1082 // after any exceptions can happen during allocations. 1083 k->set_java_mirror(mirror); 1084 1085 // Set the module field in the java_lang_Class instance. This must be done 1086 // after the mirror is set. 1087 set_mirror_module_field(THREAD, k, mirror, module); 1088 1089 if (comp_mirror() != nullptr) { 1090 // Set after k->java_mirror() is published, because compiled code running 1091 // concurrently doesn't expect a k to have a null java_mirror. 1092 release_set_array_klass(comp_mirror(), k); 1093 } 1094 if (CDSConfig::is_dumping_heap()) { 1095 create_scratch_mirror(k, CHECK); 1096 } 1097 } else { 1098 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized"); 1099 fixup_mirror_list()->push(k); 1100 } 1101 } 1102 1103 #if INCLUDE_CDS_JAVA_HEAP 1104 // The "scratch mirror" stores the states of the mirror object that can be 1105 // decided at dump time (such as the initial values of the static fields, the 1106 // component mirror, etc). At runtime, more information is added to it by 1107 // java_lang_Class::restore_archived_mirror(). 1108 // 1109 // Essentially, /*dumptime*/create_scratch_mirror() + /*runtime*/restore_archived_mirror() 1110 // produces the same result as /*runtime*/create_mirror(). 1111 // 1112 // Note: we archive the "scratch mirror" instead of k->java_mirror(), because the 1113 // latter may contain dumptime-specific information that cannot be archived 1114 // (e.g., ClassLoaderData*, or static fields that are modified by Java code execution). 1115 void java_lang_Class::create_scratch_mirror(Klass* k, TRAPS) { 1116 if (k->class_loader() != nullptr && 1117 k->class_loader() != SystemDictionary::java_platform_loader() && 1118 k->class_loader() != SystemDictionary::java_system_loader()) { 1119 // We only archive the mirrors of classes loaded by the built-in loaders 1120 return; 1121 } 1122 1123 Handle protection_domain, classData; // set to null. Will be reinitialized at runtime 1124 Handle mirror; 1125 Handle comp_mirror; 1126 allocate_mirror(k, /*is_scratch=*/true, protection_domain, classData, mirror, comp_mirror, CHECK); 1127 1128 if (comp_mirror() != nullptr) { 1129 release_set_array_klass(comp_mirror(), k); 1130 } 1131 1132 HeapShared::set_scratch_java_mirror(k, mirror()); 1133 } 1134 1135 // Returns true if the mirror is updated, false if no archived mirror 1136 // data is present. After the archived mirror object is restored, the 1137 // shared klass' _has_raw_archived_mirror flag is cleared. 1138 bool java_lang_Class::restore_archived_mirror(Klass *k, 1139 Handle class_loader, Handle module, 1140 Handle protection_domain, TRAPS) { 1141 // Postpone restoring archived mirror until java.lang.Class is loaded. Please 1142 // see more details in vmClasses::resolve_all(). 1143 if (!vmClasses::Class_klass_loaded()) { 1144 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized"); 1145 fixup_mirror_list()->push(k); 1146 return true; 1147 } 1148 1149 oop m = k->archived_java_mirror(); 1150 assert(m != nullptr, "must have stored non-null archived mirror"); 1151 1152 // Sanity: clear it now to prevent re-initialization if any of the following fails 1153 k->clear_archived_mirror_index(); 1154 1155 // mirror is archived, restore 1156 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m)); 1157 assert(as_Klass(m) == k, "must be"); 1158 Handle mirror(THREAD, m); 1159 1160 if (!k->is_array_klass()) { 1161 // - local static final fields with initial values were initialized at dump time 1162 1163 // create the init_lock 1164 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false)); 1165 set_init_lock(mirror(), r); 1166 1167 if (protection_domain.not_null()) { 1168 set_protection_domain(mirror(), protection_domain()); 1169 } 1170 } 1171 1172 assert(class_loader() == k->class_loader(), "should be same"); 1173 if (class_loader.not_null()) { 1174 set_class_loader(mirror(), class_loader()); 1175 } 1176 1177 k->set_java_mirror(mirror); 1178 1179 set_mirror_module_field(THREAD, k, mirror, module); 1180 1181 if (log_is_enabled(Trace, cds, heap, mirror)) { 1182 ResourceMark rm(THREAD); 1183 log_trace(cds, heap, mirror)( 1184 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror())); 1185 } 1186 1187 return true; 1188 } 1189 #endif // INCLUDE_CDS_JAVA_HEAP 1190 1191 void java_lang_Class::fixup_module_field(Klass* k, Handle module) { 1192 assert(_module_offset != 0, "must have been computed already"); 1193 set_module(k->java_mirror(), module()); 1194 } 1195 1196 void java_lang_Class::set_oop_size(HeapWord* java_class, size_t size) { 1197 assert(_oop_size_offset != 0, "must be set"); 1198 assert(size > 0, "Oop size must be greater than zero, not " SIZE_FORMAT, size); 1199 assert(size <= INT_MAX, "Lossy conversion: " SIZE_FORMAT, size); 1200 *(int*)(((char*)java_class) + _oop_size_offset) = (int)size; 1201 } 1202 1203 int java_lang_Class::static_oop_field_count(oop java_class) { 1204 assert(_static_oop_field_count_offset != 0, "must be set"); 1205 return java_class->int_field(_static_oop_field_count_offset); 1206 } 1207 1208 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) { 1209 assert(_static_oop_field_count_offset != 0, "must be set"); 1210 java_class->int_field_put(_static_oop_field_count_offset, size); 1211 } 1212 1213 oop java_lang_Class::protection_domain(oop java_class) { 1214 assert(_protection_domain_offset != 0, "must be set"); 1215 return java_class->obj_field(_protection_domain_offset); 1216 } 1217 void java_lang_Class::set_protection_domain(oop java_class, oop pd) { 1218 assert(_protection_domain_offset != 0, "must be set"); 1219 java_class->obj_field_put(_protection_domain_offset, pd); 1220 } 1221 1222 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) { 1223 assert(_component_mirror_offset != 0, "must be set"); 1224 java_class->obj_field_put(_component_mirror_offset, comp_mirror); 1225 } 1226 oop java_lang_Class::component_mirror(oop java_class) { 1227 assert(_component_mirror_offset != 0, "must be set"); 1228 return java_class->obj_field(_component_mirror_offset); 1229 } 1230 1231 oop java_lang_Class::init_lock(oop java_class) { 1232 assert(_init_lock_offset != 0, "must be set"); 1233 return java_class->obj_field(_init_lock_offset); 1234 } 1235 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) { 1236 assert(_init_lock_offset != 0, "must be set"); 1237 java_class->obj_field_put(_init_lock_offset, init_lock); 1238 } 1239 1240 objArrayOop java_lang_Class::signers(oop java_class) { 1241 assert(_signers_offset != 0, "must be set"); 1242 return (objArrayOop)java_class->obj_field(_signers_offset); 1243 } 1244 1245 oop java_lang_Class::class_data(oop java_class) { 1246 assert(_classData_offset != 0, "must be set"); 1247 return java_class->obj_field(_classData_offset); 1248 } 1249 void java_lang_Class::set_class_data(oop java_class, oop class_data) { 1250 assert(_classData_offset != 0, "must be set"); 1251 java_class->obj_field_put(_classData_offset, class_data); 1252 } 1253 1254 void java_lang_Class::set_class_loader(oop java_class, oop loader) { 1255 assert(_class_loader_offset != 0, "offsets should have been initialized"); 1256 java_class->obj_field_put(_class_loader_offset, loader); 1257 } 1258 1259 oop java_lang_Class::class_loader(oop java_class) { 1260 assert(_class_loader_offset != 0, "must be set"); 1261 return java_class->obj_field(_class_loader_offset); 1262 } 1263 1264 oop java_lang_Class::module(oop java_class) { 1265 assert(_module_offset != 0, "must be set"); 1266 return java_class->obj_field(_module_offset); 1267 } 1268 1269 void java_lang_Class::set_module(oop java_class, oop module) { 1270 assert(_module_offset != 0, "must be set"); 1271 java_class->obj_field_put(_module_offset, module); 1272 } 1273 1274 oop java_lang_Class::name(Handle java_class, TRAPS) { 1275 assert(_name_offset != 0, "must be set"); 1276 oop o = java_class->obj_field(_name_offset); 1277 if (o == nullptr) { 1278 o = StringTable::intern(as_external_name(java_class()), THREAD); 1279 java_class->obj_field_put(_name_offset, o); 1280 } 1281 return o; 1282 } 1283 1284 oop java_lang_Class::source_file(oop java_class) { 1285 assert(_source_file_offset != 0, "must be set"); 1286 return java_class->obj_field(_source_file_offset); 1287 } 1288 1289 void java_lang_Class::set_source_file(oop java_class, oop source_file) { 1290 assert(_source_file_offset != 0, "must be set"); 1291 java_class->obj_field_put(_source_file_offset, source_file); 1292 } 1293 1294 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) { 1295 // This should be improved by adding a field at the Java level or by 1296 // introducing a new VM klass (see comment in ClassFileParser) 1297 oop java_class = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(nullptr, CHECK_NULL); 1298 if (type != T_VOID) { 1299 Klass* aklass = Universe::typeArrayKlass(type); 1300 assert(aklass != nullptr, "correct bootstrap"); 1301 release_set_array_klass(java_class, aklass); 1302 } 1303 #ifdef ASSERT 1304 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(vmClasses::Class_klass()); 1305 assert(static_oop_field_count(java_class) == 0, "should have been zeroed by allocation"); 1306 #endif 1307 return java_class; 1308 } 1309 1310 void java_lang_Class::set_klass(oop java_class, Klass* klass) { 1311 assert(is_instance(java_class), "must be a Class object"); 1312 java_class->metadata_field_put(_klass_offset, klass); 1313 } 1314 1315 1316 void java_lang_Class::print_signature(oop java_class, outputStream* st) { 1317 assert(is_instance(java_class), "must be a Class object"); 1318 Symbol* name = nullptr; 1319 bool is_instance = false; 1320 if (is_primitive(java_class)) { 1321 name = vmSymbols::type_signature(primitive_type(java_class)); 1322 } else { 1323 Klass* k = as_Klass(java_class); 1324 is_instance = k->is_instance_klass(); 1325 name = k->name(); 1326 } 1327 if (name == nullptr) { 1328 st->print("<null>"); 1329 return; 1330 } 1331 if (is_instance) st->print("L"); 1332 st->write((char*) name->base(), (int) name->utf8_length()); 1333 if (is_instance) st->print(";"); 1334 } 1335 1336 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) { 1337 assert(is_instance(java_class), "must be a Class object"); 1338 Symbol* name; 1339 if (is_primitive(java_class)) { 1340 name = vmSymbols::type_signature(primitive_type(java_class)); 1341 // Because this can create a new symbol, the caller has to decrement 1342 // the refcount, so make adjustment here and below for symbols returned 1343 // that are not created or incremented due to a successful lookup. 1344 name->increment_refcount(); 1345 } else { 1346 Klass* k = as_Klass(java_class); 1347 if (!k->is_instance_klass()) { 1348 name = k->name(); 1349 name->increment_refcount(); 1350 } else { 1351 ResourceMark rm; 1352 const char* sigstr = k->signature_name(); 1353 int siglen = (int) strlen(sigstr); 1354 if (!intern_if_not_found) { 1355 name = SymbolTable::probe(sigstr, siglen); 1356 } else { 1357 name = SymbolTable::new_symbol(sigstr, siglen); 1358 } 1359 } 1360 } 1361 return name; 1362 } 1363 1364 // Returns the Java name for this Java mirror (Resource allocated) 1365 // See Klass::external_name(). 1366 // For primitive type Java mirrors, its type name is returned. 1367 const char* java_lang_Class::as_external_name(oop java_class) { 1368 assert(is_instance(java_class), "must be a Class object"); 1369 const char* name = nullptr; 1370 if (is_primitive(java_class)) { 1371 name = type2name(primitive_type(java_class)); 1372 } else { 1373 name = as_Klass(java_class)->external_name(); 1374 } 1375 if (name == nullptr) { 1376 name = "<null>"; 1377 } 1378 return name; 1379 } 1380 1381 Klass* java_lang_Class::array_klass_acquire(oop java_class) { 1382 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset)); 1383 assert(k == nullptr || (k->is_klass() && k->is_array_klass()), "should be array klass"); 1384 return k; 1385 } 1386 1387 1388 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) { 1389 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass"); 1390 java_class->release_metadata_field_put(_array_klass_offset, klass); 1391 } 1392 1393 1394 BasicType java_lang_Class::primitive_type(oop java_class) { 1395 assert(is_primitive(java_class), "just checking"); 1396 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1397 BasicType type = T_VOID; 1398 if (ak != nullptr) { 1399 // Note: create_basic_type_mirror above initializes ak to a non-null value. 1400 type = ArrayKlass::cast(ak)->element_type(); 1401 } else { 1402 assert(java_class == Universe::void_mirror(), "only valid non-array primitive"); 1403 } 1404 #ifdef ASSERT 1405 if (CDSConfig::is_dumping_heap()) { 1406 oop mirror = Universe::java_mirror(type); 1407 oop scratch_mirror = HeapShared::scratch_java_mirror(type); 1408 assert(java_class == mirror || java_class == scratch_mirror, "must be consistent"); 1409 } else { 1410 assert(Universe::java_mirror(type) == java_class, "must be consistent"); 1411 } 1412 #endif 1413 return type; 1414 } 1415 1416 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) { 1417 assert(is_instance(java_class), "must be a Class object"); 1418 if (is_primitive(java_class)) { 1419 if (reference_klass != nullptr) 1420 (*reference_klass) = nullptr; 1421 return primitive_type(java_class); 1422 } else { 1423 if (reference_klass != nullptr) 1424 (*reference_klass) = as_Klass(java_class); 1425 return T_OBJECT; 1426 } 1427 } 1428 1429 1430 oop java_lang_Class::primitive_mirror(BasicType t) { 1431 oop mirror = Universe::java_mirror(t); 1432 assert(mirror != nullptr && mirror->is_a(vmClasses::Class_klass()), "must be a Class"); 1433 assert(is_primitive(mirror), "must be primitive"); 1434 return mirror; 1435 } 1436 1437 #define CLASS_FIELDS_DO(macro) \ 1438 macro(_classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false); \ 1439 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \ 1440 macro(_component_mirror_offset, k, "componentType", class_signature, false); \ 1441 macro(_module_offset, k, "module", module_signature, false); \ 1442 macro(_name_offset, k, "name", string_signature, false); \ 1443 macro(_classData_offset, k, "classData", object_signature, false); \ 1444 macro(_signers_offset, k, "signers", object_array_signature, false); 1445 1446 void java_lang_Class::compute_offsets() { 1447 if (_offsets_computed) { 1448 return; 1449 } 1450 1451 _offsets_computed = true; 1452 1453 InstanceKlass* k = vmClasses::Class_klass(); 1454 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1455 1456 // Init lock is a C union with component_mirror. Only instanceKlass mirrors have 1457 // init_lock and only ArrayKlass mirrors have component_mirror. Since both are oops 1458 // GC treats them the same. 1459 _init_lock_offset = _component_mirror_offset; 1460 1461 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 1462 } 1463 1464 #if INCLUDE_CDS 1465 void java_lang_Class::serialize_offsets(SerializeClosure* f) { 1466 f->do_bool(&_offsets_computed); 1467 f->do_u4((u4*)&_init_lock_offset); 1468 1469 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1470 1471 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 1472 } 1473 #endif 1474 1475 int java_lang_Class::classRedefinedCount(oop the_class_mirror) { 1476 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized"); 1477 return the_class_mirror->int_field(_classRedefinedCount_offset); 1478 } 1479 1480 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) { 1481 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized"); 1482 the_class_mirror->int_field_put(_classRedefinedCount_offset, value); 1483 } 1484 1485 1486 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the 1487 // platform thread structure, and a eetop offset which was used for thread 1488 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures 1489 // merged, so in the HotSpot VM we just use the eetop field for the thread 1490 // instead of the privateInfo_offset. 1491 // 1492 // Note: The stackSize field is only present starting in 1.4. 1493 1494 int java_lang_Thread_FieldHolder::_group_offset; 1495 int java_lang_Thread_FieldHolder::_priority_offset; 1496 int java_lang_Thread_FieldHolder::_stackSize_offset; 1497 int java_lang_Thread_FieldHolder::_daemon_offset; 1498 int java_lang_Thread_FieldHolder::_thread_status_offset; 1499 1500 #define THREAD_FIELD_HOLDER_FIELDS_DO(macro) \ 1501 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \ 1502 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \ 1503 macro(_stackSize_offset, k, "stackSize", long_signature, false); \ 1504 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \ 1505 macro(_thread_status_offset, k, "threadStatus", int_signature, false) 1506 1507 void java_lang_Thread_FieldHolder::compute_offsets() { 1508 assert(_group_offset == 0, "offsets should be initialized only once"); 1509 1510 InstanceKlass* k = vmClasses::Thread_FieldHolder_klass(); 1511 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1512 } 1513 1514 #if INCLUDE_CDS 1515 void java_lang_Thread_FieldHolder::serialize_offsets(SerializeClosure* f) { 1516 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1517 } 1518 #endif 1519 1520 oop java_lang_Thread_FieldHolder::threadGroup(oop holder) { 1521 return holder->obj_field(_group_offset); 1522 } 1523 1524 ThreadPriority java_lang_Thread_FieldHolder::priority(oop holder) { 1525 return (ThreadPriority)holder->int_field(_priority_offset); 1526 } 1527 1528 void java_lang_Thread_FieldHolder::set_priority(oop holder, ThreadPriority priority) { 1529 holder->int_field_put(_priority_offset, priority); 1530 } 1531 1532 jlong java_lang_Thread_FieldHolder::stackSize(oop holder) { 1533 return holder->long_field(_stackSize_offset); 1534 } 1535 1536 bool java_lang_Thread_FieldHolder::is_daemon(oop holder) { 1537 return holder->bool_field(_daemon_offset) != 0; 1538 } 1539 1540 void java_lang_Thread_FieldHolder::set_daemon(oop holder, bool val) { 1541 assert(val, "daemon status is never turned off"); 1542 holder->bool_field_put(_daemon_offset, val); 1543 } 1544 1545 void java_lang_Thread_FieldHolder::set_thread_status(oop holder, JavaThreadStatus status) { 1546 holder->int_field_put(_thread_status_offset, static_cast<int>(status)); 1547 } 1548 1549 JavaThreadStatus java_lang_Thread_FieldHolder::get_thread_status(oop holder) { 1550 return static_cast<JavaThreadStatus>(holder->int_field(_thread_status_offset)); 1551 } 1552 1553 1554 int java_lang_Thread_Constants::_static_VTHREAD_GROUP_offset = 0; 1555 1556 #define THREAD_CONSTANTS_STATIC_FIELDS_DO(macro) \ 1557 macro(_static_VTHREAD_GROUP_offset, k, "VTHREAD_GROUP", threadgroup_signature, true); 1558 1559 void java_lang_Thread_Constants::compute_offsets() { 1560 assert(_static_VTHREAD_GROUP_offset == 0, "offsets should be initialized only once"); 1561 1562 InstanceKlass* k = vmClasses::Thread_Constants_klass(); 1563 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1564 } 1565 1566 #if INCLUDE_CDS 1567 void java_lang_Thread_Constants::serialize_offsets(SerializeClosure* f) { 1568 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1569 } 1570 #endif 1571 1572 oop java_lang_Thread_Constants::get_VTHREAD_GROUP() { 1573 InstanceKlass* k = vmClasses::Thread_Constants_klass(); 1574 oop base = k->static_field_base_raw(); 1575 return base->obj_field(_static_VTHREAD_GROUP_offset); 1576 } 1577 1578 1579 int java_lang_Thread::_holder_offset; 1580 int java_lang_Thread::_name_offset; 1581 int java_lang_Thread::_contextClassLoader_offset; 1582 int java_lang_Thread::_inheritedAccessControlContext_offset; 1583 int java_lang_Thread::_eetop_offset; 1584 int java_lang_Thread::_jvmti_thread_state_offset; 1585 int java_lang_Thread::_jvmti_VTMS_transition_disable_count_offset; 1586 int java_lang_Thread::_jvmti_is_in_VTMS_transition_offset; 1587 int java_lang_Thread::_interrupted_offset; 1588 int java_lang_Thread::_interruptLock_offset; 1589 int java_lang_Thread::_tid_offset; 1590 int java_lang_Thread::_continuation_offset; 1591 int java_lang_Thread::_park_blocker_offset; 1592 int java_lang_Thread::_scopedValueBindings_offset; 1593 JFR_ONLY(int java_lang_Thread::_jfr_epoch_offset;) 1594 1595 #define THREAD_FIELDS_DO(macro) \ 1596 macro(_holder_offset, k, "holder", thread_fieldholder_signature, false); \ 1597 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 1598 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \ 1599 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \ 1600 macro(_eetop_offset, k, "eetop", long_signature, false); \ 1601 macro(_interrupted_offset, k, "interrupted", bool_signature, false); \ 1602 macro(_interruptLock_offset, k, "interruptLock", object_signature, false); \ 1603 macro(_tid_offset, k, "tid", long_signature, false); \ 1604 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \ 1605 macro(_continuation_offset, k, "cont", continuation_signature, false); \ 1606 macro(_scopedValueBindings_offset, k, "scopedValueBindings", object_signature, false); 1607 1608 void java_lang_Thread::compute_offsets() { 1609 assert(_holder_offset == 0, "offsets should be initialized only once"); 1610 1611 InstanceKlass* k = vmClasses::Thread_klass(); 1612 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1613 THREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 1614 } 1615 1616 #if INCLUDE_CDS 1617 void java_lang_Thread::serialize_offsets(SerializeClosure* f) { 1618 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1619 THREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 1620 } 1621 #endif 1622 1623 JavaThread* java_lang_Thread::thread(oop java_thread) { 1624 return reinterpret_cast<JavaThread*>(java_thread->address_field(_eetop_offset)); 1625 } 1626 1627 JavaThread* java_lang_Thread::thread_acquire(oop java_thread) { 1628 return reinterpret_cast<JavaThread*>(java_thread->address_field_acquire(_eetop_offset)); 1629 } 1630 1631 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) { 1632 java_thread->address_field_put(_eetop_offset, (address)thread); 1633 } 1634 1635 void java_lang_Thread::release_set_thread(oop java_thread, JavaThread* thread) { 1636 java_thread->release_address_field_put(_eetop_offset, (address)thread); 1637 } 1638 1639 JvmtiThreadState* java_lang_Thread::jvmti_thread_state(oop java_thread) { 1640 return (JvmtiThreadState*)java_thread->address_field(_jvmti_thread_state_offset); 1641 } 1642 1643 void java_lang_Thread::set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state) { 1644 java_thread->address_field_put(_jvmti_thread_state_offset, (address)state); 1645 } 1646 1647 int java_lang_Thread::VTMS_transition_disable_count(oop java_thread) { 1648 return java_thread->int_field(_jvmti_VTMS_transition_disable_count_offset); 1649 } 1650 1651 void java_lang_Thread::inc_VTMS_transition_disable_count(oop java_thread) { 1652 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked"); 1653 int val = VTMS_transition_disable_count(java_thread); 1654 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val + 1); 1655 } 1656 1657 void java_lang_Thread::dec_VTMS_transition_disable_count(oop java_thread) { 1658 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked"); 1659 int val = VTMS_transition_disable_count(java_thread); 1660 assert(val > 0, "VTMS_transition_disable_count should never be negative"); 1661 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val - 1); 1662 } 1663 1664 bool java_lang_Thread::is_in_VTMS_transition(oop java_thread) { 1665 return java_thread->bool_field_volatile(_jvmti_is_in_VTMS_transition_offset); 1666 } 1667 1668 void java_lang_Thread::set_is_in_VTMS_transition(oop java_thread, bool val) { 1669 assert(is_in_VTMS_transition(java_thread) != val, "already %s transition", val ? "inside" : "outside"); 1670 java_thread->bool_field_put_volatile(_jvmti_is_in_VTMS_transition_offset, val); 1671 } 1672 1673 int java_lang_Thread::is_in_VTMS_transition_offset() { 1674 return _jvmti_is_in_VTMS_transition_offset; 1675 } 1676 1677 void java_lang_Thread::clear_scopedValueBindings(oop java_thread) { 1678 assert(java_thread != nullptr, "need a java_lang_Thread pointer here"); 1679 java_thread->obj_field_put(_scopedValueBindings_offset, nullptr); 1680 } 1681 1682 oop java_lang_Thread::holder(oop java_thread) { 1683 // Note: may return null if the thread is still attaching 1684 return java_thread->obj_field(_holder_offset); 1685 } 1686 oop java_lang_Thread::interrupt_lock(oop java_thread) { 1687 return java_thread->obj_field(_interruptLock_offset); 1688 } 1689 1690 bool java_lang_Thread::interrupted(oop java_thread) { 1691 // Make sure the caller can safely access oops. 1692 assert(Thread::current()->is_VM_thread() || 1693 (JavaThread::current()->thread_state() != _thread_blocked && 1694 JavaThread::current()->thread_state() != _thread_in_native), 1695 "Unsafe access to oop"); 1696 return java_thread->bool_field_volatile(_interrupted_offset); 1697 } 1698 1699 void java_lang_Thread::set_interrupted(oop java_thread, bool val) { 1700 // Make sure the caller can safely access oops. 1701 assert(Thread::current()->is_VM_thread() || 1702 (JavaThread::current()->thread_state() != _thread_blocked && 1703 JavaThread::current()->thread_state() != _thread_in_native), 1704 "Unsafe access to oop"); 1705 java_thread->bool_field_put_volatile(_interrupted_offset, val); 1706 } 1707 1708 1709 oop java_lang_Thread::name(oop java_thread) { 1710 return java_thread->obj_field(_name_offset); 1711 } 1712 1713 1714 void java_lang_Thread::set_name(oop java_thread, oop name) { 1715 java_thread->obj_field_put(_name_offset, name); 1716 } 1717 1718 // Convenience macros for setting and getting Thread fields that 1719 // are actually stored in the FieldHolder object of the thread. 1720 // The FieldHolder can be null whilst a thread is attaching via 1721 // JNI, and when the main thread is attaching. 1722 1723 // The default value should be the default/zero initialized value 1724 // of the field as it would be in java.lang.Thread.FieldHolder. 1725 #define GET_FIELDHOLDER_FIELD(java_thread, field, default_val) \ 1726 { \ 1727 oop holder = java_lang_Thread::holder(java_thread); \ 1728 if (holder != nullptr) \ 1729 return java_lang_Thread_FieldHolder::field(holder); \ 1730 else \ 1731 return default_val; \ 1732 } 1733 1734 // We should never be trying to set a field of an attaching thread. 1735 #define SET_FIELDHOLDER_FIELD(java_thread, field, value) \ 1736 { \ 1737 oop holder = java_lang_Thread::holder(java_thread); \ 1738 assert(holder != nullptr, "Thread not fully initialized"); \ 1739 java_lang_Thread_FieldHolder::set_##field(holder, value); \ 1740 } 1741 1742 1743 ThreadPriority java_lang_Thread::priority(oop java_thread) { 1744 GET_FIELDHOLDER_FIELD(java_thread, priority, (ThreadPriority)0); 1745 } 1746 1747 1748 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) { 1749 SET_FIELDHOLDER_FIELD(java_thread, priority, priority) 1750 } 1751 1752 1753 oop java_lang_Thread::threadGroup(oop java_thread) { 1754 GET_FIELDHOLDER_FIELD(java_thread, threadGroup, nullptr); 1755 } 1756 1757 1758 bool java_lang_Thread::is_alive(oop java_thread) { 1759 JavaThread* thr = java_lang_Thread::thread(java_thread); 1760 return (thr != nullptr); 1761 } 1762 1763 1764 bool java_lang_Thread::is_daemon(oop java_thread) { 1765 GET_FIELDHOLDER_FIELD(java_thread, is_daemon, false); 1766 } 1767 1768 1769 void java_lang_Thread::set_daemon(oop java_thread) { 1770 SET_FIELDHOLDER_FIELD(java_thread, daemon, true); 1771 } 1772 1773 oop java_lang_Thread::context_class_loader(oop java_thread) { 1774 return java_thread->obj_field(_contextClassLoader_offset); 1775 } 1776 1777 oop java_lang_Thread::inherited_access_control_context(oop java_thread) { 1778 return java_thread->obj_field(_inheritedAccessControlContext_offset); 1779 } 1780 1781 1782 jlong java_lang_Thread::stackSize(oop java_thread) { 1783 GET_FIELDHOLDER_FIELD(java_thread, stackSize, 0); 1784 } 1785 1786 // Write the thread status value to threadStatus field in java.lang.Thread java class. 1787 void java_lang_Thread::set_thread_status(oop java_thread, JavaThreadStatus status) { 1788 SET_FIELDHOLDER_FIELD(java_thread, thread_status, status); 1789 } 1790 1791 // Read thread status value from threadStatus field in java.lang.Thread java class. 1792 JavaThreadStatus java_lang_Thread::get_thread_status(oop java_thread) { 1793 // Make sure the caller is operating on behalf of the VM or is 1794 // running VM code (state == _thread_in_vm). 1795 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() || 1796 JavaThread::current()->thread_state() == _thread_in_vm, 1797 "Java Thread is not running in vm"); 1798 GET_FIELDHOLDER_FIELD(java_thread, get_thread_status, JavaThreadStatus::NEW /* not initialized */); 1799 } 1800 1801 ByteSize java_lang_Thread::thread_id_offset() { 1802 return in_ByteSize(_tid_offset); 1803 } 1804 1805 oop java_lang_Thread::park_blocker(oop java_thread) { 1806 return java_thread->obj_field(_park_blocker_offset); 1807 } 1808 1809 oop java_lang_Thread::async_get_stack_trace(oop java_thread, TRAPS) { 1810 ThreadsListHandle tlh(JavaThread::current()); 1811 JavaThread* thread; 1812 bool is_virtual = java_lang_VirtualThread::is_instance(java_thread); 1813 if (is_virtual) { 1814 oop carrier_thread = java_lang_VirtualThread::carrier_thread(java_thread); 1815 if (carrier_thread == nullptr) { 1816 return nullptr; 1817 } 1818 thread = java_lang_Thread::thread(carrier_thread); 1819 } else { 1820 thread = java_lang_Thread::thread(java_thread); 1821 } 1822 if (thread == nullptr) { 1823 return nullptr; 1824 } 1825 1826 class GetStackTraceClosure : public HandshakeClosure { 1827 public: 1828 const Handle _java_thread; 1829 int _depth; 1830 bool _retry_handshake; 1831 GrowableArray<Method*>* _methods; 1832 GrowableArray<int>* _bcis; 1833 1834 GetStackTraceClosure(Handle java_thread) : 1835 HandshakeClosure("GetStackTraceClosure"), _java_thread(java_thread), _depth(0), _retry_handshake(false), 1836 _methods(nullptr), _bcis(nullptr) { 1837 } 1838 ~GetStackTraceClosure() { 1839 delete _methods; 1840 delete _bcis; 1841 } 1842 1843 bool read_reset_retry() { 1844 bool ret = _retry_handshake; 1845 // If we re-execute the handshake this method need to return false 1846 // when the handshake cannot be performed. (E.g. thread terminating) 1847 _retry_handshake = false; 1848 return ret; 1849 } 1850 1851 void do_thread(Thread* th) { 1852 if (!Thread::current()->is_Java_thread()) { 1853 _retry_handshake = true; 1854 return; 1855 } 1856 1857 JavaThread* thread = JavaThread::cast(th); 1858 1859 if (!thread->has_last_Java_frame()) { 1860 return; 1861 } 1862 1863 bool carrier = false; 1864 if (java_lang_VirtualThread::is_instance(_java_thread())) { 1865 // if (thread->vthread() != _java_thread()) // We might be inside a System.executeOnCarrierThread 1866 const ContinuationEntry* ce = thread->vthread_continuation(); 1867 if (ce == nullptr || ce->cont_oop(thread) != java_lang_VirtualThread::continuation(_java_thread())) { 1868 return; // not mounted 1869 } 1870 } else { 1871 carrier = (thread->vthread_continuation() != nullptr); 1872 } 1873 1874 const int max_depth = MaxJavaStackTraceDepth; 1875 const bool skip_hidden = !ShowHiddenFrames; 1876 1877 // Pick minimum length that will cover most cases 1878 int init_length = 64; 1879 _methods = new (mtInternal) GrowableArray<Method*>(init_length, mtInternal); 1880 _bcis = new (mtInternal) GrowableArray<int>(init_length, mtInternal); 1881 1882 int total_count = 0; 1883 for (vframeStream vfst(thread, false, false, carrier); // we don't process frames as we don't care about oops 1884 !vfst.at_end() && (max_depth == 0 || max_depth != total_count); 1885 vfst.next()) { 1886 1887 if (skip_hidden && (vfst.method()->is_hidden() || 1888 vfst.method()->is_continuation_enter_intrinsic())) { 1889 continue; 1890 } 1891 1892 _methods->push(vfst.method()); 1893 _bcis->push(vfst.bci()); 1894 total_count++; 1895 } 1896 1897 _depth = total_count; 1898 } 1899 }; 1900 1901 // Handshake with target 1902 ResourceMark rm(THREAD); 1903 HandleMark hm(THREAD); 1904 GetStackTraceClosure gstc(Handle(THREAD, java_thread)); 1905 do { 1906 Handshake::execute(&gstc, &tlh, thread); 1907 } while (gstc.read_reset_retry()); 1908 1909 // Stop if no stack trace is found. 1910 if (gstc._depth == 0) { 1911 return nullptr; 1912 } 1913 1914 // Convert to StackTraceElement array 1915 InstanceKlass* k = vmClasses::StackTraceElement_klass(); 1916 assert(k != nullptr, "must be loaded in 1.4+"); 1917 if (k->should_be_initialized()) { 1918 k->initialize(CHECK_NULL); 1919 } 1920 objArrayHandle trace = oopFactory::new_objArray_handle(k, gstc._depth, CHECK_NULL); 1921 1922 for (int i = 0; i < gstc._depth; i++) { 1923 methodHandle method(THREAD, gstc._methods->at(i)); 1924 oop element = java_lang_StackTraceElement::create(method, 1925 gstc._bcis->at(i), 1926 CHECK_NULL); 1927 trace->obj_at_put(i, element); 1928 } 1929 1930 return trace(); 1931 } 1932 1933 const char* java_lang_Thread::thread_status_name(oop java_thread) { 1934 JavaThreadStatus status = get_thread_status(java_thread); 1935 switch (status) { 1936 case JavaThreadStatus::NEW : return "NEW"; 1937 case JavaThreadStatus::RUNNABLE : return "RUNNABLE"; 1938 case JavaThreadStatus::SLEEPING : return "TIMED_WAITING (sleeping)"; 1939 case JavaThreadStatus::IN_OBJECT_WAIT : return "WAITING (on object monitor)"; 1940 case JavaThreadStatus::IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)"; 1941 case JavaThreadStatus::PARKED : return "WAITING (parking)"; 1942 case JavaThreadStatus::PARKED_TIMED : return "TIMED_WAITING (parking)"; 1943 case JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)"; 1944 case JavaThreadStatus::TERMINATED : return "TERMINATED"; 1945 default : return "UNKNOWN"; 1946 }; 1947 } 1948 int java_lang_ThreadGroup::_parent_offset; 1949 int java_lang_ThreadGroup::_name_offset; 1950 int java_lang_ThreadGroup::_maxPriority_offset; 1951 int java_lang_ThreadGroup::_daemon_offset; 1952 1953 oop java_lang_ThreadGroup::parent(oop java_thread_group) { 1954 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1955 return java_thread_group->obj_field(_parent_offset); 1956 } 1957 1958 // ("name as oop" accessor is not necessary) 1959 1960 const char* java_lang_ThreadGroup::name(oop java_thread_group) { 1961 oop name = java_thread_group->obj_field(_name_offset); 1962 // ThreadGroup.name can be null 1963 if (name != nullptr) { 1964 return java_lang_String::as_utf8_string(name); 1965 } 1966 return nullptr; 1967 } 1968 1969 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) { 1970 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1971 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset); 1972 } 1973 1974 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) { 1975 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1976 return java_thread_group->bool_field(_daemon_offset) != 0; 1977 } 1978 1979 #define THREADGROUP_FIELDS_DO(macro) \ 1980 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \ 1981 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 1982 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \ 1983 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); 1984 1985 void java_lang_ThreadGroup::compute_offsets() { 1986 assert(_parent_offset == 0, "offsets should be initialized only once"); 1987 1988 InstanceKlass* k = vmClasses::ThreadGroup_klass(); 1989 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1990 } 1991 1992 #if INCLUDE_CDS 1993 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) { 1994 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1995 } 1996 #endif 1997 1998 1999 // java_lang_VirtualThread 2000 2001 int java_lang_VirtualThread::static_vthread_scope_offset; 2002 int java_lang_VirtualThread::_carrierThread_offset; 2003 int java_lang_VirtualThread::_continuation_offset; 2004 int java_lang_VirtualThread::_state_offset; 2005 int java_lang_VirtualThread::_next_offset; 2006 int java_lang_VirtualThread::_onWaitingList_offset; 2007 int java_lang_VirtualThread::_notified_offset; 2008 int java_lang_VirtualThread::_recheckInterval_offset; 2009 int java_lang_VirtualThread::_waitTimeout_offset; 2010 2011 #define VTHREAD_FIELDS_DO(macro) \ 2012 macro(static_vthread_scope_offset, k, "VTHREAD_SCOPE", continuationscope_signature, true); \ 2013 macro(_carrierThread_offset, k, "carrierThread", thread_signature, false); \ 2014 macro(_continuation_offset, k, "cont", continuation_signature, false); \ 2015 macro(_state_offset, k, "state", int_signature, false); \ 2016 macro(_next_offset, k, "next", vthread_signature, false); \ 2017 macro(_onWaitingList_offset, k, "onWaitingList", byte_signature, false); \ 2018 macro(_notified_offset, k, "notified", bool_signature, false); \ 2019 macro(_recheckInterval_offset, k, "recheckInterval", byte_signature, false); \ 2020 macro(_waitTimeout_offset, k, "waitTimeout", long_signature, false); 2021 2022 2023 void java_lang_VirtualThread::compute_offsets() { 2024 InstanceKlass* k = vmClasses::VirtualThread_klass(); 2025 VTHREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2026 } 2027 2028 bool java_lang_VirtualThread::is_instance(oop obj) { 2029 return obj != nullptr && is_subclass(obj->klass()); 2030 } 2031 2032 oop java_lang_VirtualThread::carrier_thread(oop vthread) { 2033 oop thread = vthread->obj_field(_carrierThread_offset); 2034 return thread; 2035 } 2036 2037 oop java_lang_VirtualThread::continuation(oop vthread) { 2038 oop cont = vthread->obj_field(_continuation_offset); 2039 return cont; 2040 } 2041 2042 int java_lang_VirtualThread::state(oop vthread) { 2043 return vthread->int_field_acquire(_state_offset); 2044 } 2045 2046 void java_lang_VirtualThread::set_state(oop vthread, int state) { 2047 vthread->release_int_field_put(_state_offset, state); 2048 } 2049 2050 int java_lang_VirtualThread::cmpxchg_state(oop vthread, int old_state, int new_state) { 2051 jint* addr = vthread->field_addr<jint>(_state_offset); 2052 int res = Atomic::cmpxchg(addr, old_state, new_state); 2053 return res; 2054 } 2055 2056 oop java_lang_VirtualThread::next(oop vthread) { 2057 return vthread->obj_field(_next_offset); 2058 } 2059 2060 void java_lang_VirtualThread::set_next(oop vthread, oop next_vthread) { 2061 vthread->obj_field_put(_next_offset, next_vthread); 2062 } 2063 2064 bool java_lang_VirtualThread::set_onWaitingList(oop vthread, OopHandle& list_head) { 2065 uint8_t* addr = vthread->field_addr<uint8_t>(_onWaitingList_offset); 2066 uint8_t value = Atomic::load(addr); 2067 assert(value == 0x00 || value == 0x01, "invariant"); 2068 if (value == 0x00) { 2069 value = Atomic::cmpxchg(addr, (uint8_t)0x00, (uint8_t)0x01); 2070 if (value == 0x00) { 2071 for (;;) { 2072 oop head = list_head.resolve(); 2073 java_lang_VirtualThread::set_next(vthread, head); 2074 if (list_head.cmpxchg(head, vthread) == head) return true; 2075 } 2076 } 2077 } 2078 return false; // already on waiting list 2079 } 2080 2081 void java_lang_VirtualThread::set_notified(oop vthread, jboolean value) { 2082 vthread->bool_field_put_volatile(_notified_offset, value); 2083 } 2084 2085 jbyte java_lang_VirtualThread::recheckInterval(oop vthread) { 2086 return vthread->byte_field(_recheckInterval_offset); 2087 } 2088 2089 void java_lang_VirtualThread::set_recheckInterval(oop vthread, jbyte value) { 2090 vthread->release_byte_field_put(_recheckInterval_offset, value); 2091 } 2092 2093 jlong java_lang_VirtualThread::waitTimeout(oop vthread) { 2094 return vthread->long_field(_waitTimeout_offset); 2095 } 2096 2097 void java_lang_VirtualThread::set_waitTimeout(oop vthread, jlong value) { 2098 vthread->long_field_put(_waitTimeout_offset, value); 2099 } 2100 2101 JavaThreadStatus java_lang_VirtualThread::map_state_to_thread_status(int state) { 2102 JavaThreadStatus status = JavaThreadStatus::NEW; 2103 switch (state & ~SUSPENDED) { 2104 case NEW: 2105 status = JavaThreadStatus::NEW; 2106 break; 2107 case STARTED: 2108 case RUNNING: 2109 case PARKING: 2110 case TIMED_PARKING: 2111 case UNPARKED: 2112 case YIELDING: 2113 case YIELDED: 2114 case BLOCKING: 2115 case UNBLOCKED: 2116 case WAITING: 2117 case TIMED_WAITING: 2118 status = JavaThreadStatus::RUNNABLE; 2119 break; 2120 case PARKED: 2121 case PINNED: 2122 status = JavaThreadStatus::PARKED; 2123 break; 2124 case TIMED_PARKED: 2125 case TIMED_PINNED: 2126 status = JavaThreadStatus::PARKED_TIMED; 2127 break; 2128 case BLOCKED: 2129 status = JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER; 2130 break; 2131 case WAIT: 2132 status = JavaThreadStatus::IN_OBJECT_WAIT; 2133 break; 2134 case TIMED_WAIT: 2135 status = JavaThreadStatus::IN_OBJECT_WAIT_TIMED; 2136 break; 2137 case TERMINATED: 2138 status = JavaThreadStatus::TERMINATED; 2139 break; 2140 default: 2141 ShouldNotReachHere(); 2142 } 2143 return status; 2144 } 2145 2146 bool java_lang_VirtualThread::is_preempted(oop vthread) { 2147 oop continuation = java_lang_VirtualThread::continuation(vthread); 2148 return jdk_internal_vm_Continuation::is_preempted(continuation); 2149 } 2150 2151 #if INCLUDE_CDS 2152 void java_lang_VirtualThread::serialize_offsets(SerializeClosure* f) { 2153 VTHREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2154 } 2155 #endif 2156 2157 // java_lang_Throwable 2158 2159 int java_lang_Throwable::_backtrace_offset; 2160 int java_lang_Throwable::_detailMessage_offset; 2161 int java_lang_Throwable::_stackTrace_offset; 2162 int java_lang_Throwable::_depth_offset; 2163 int java_lang_Throwable::_cause_offset; 2164 int java_lang_Throwable::_static_unassigned_stacktrace_offset; 2165 2166 #define THROWABLE_FIELDS_DO(macro) \ 2167 macro(_backtrace_offset, k, "backtrace", object_signature, false); \ 2168 macro(_detailMessage_offset, k, "detailMessage", string_signature, false); \ 2169 macro(_stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \ 2170 macro(_depth_offset, k, "depth", int_signature, false); \ 2171 macro(_cause_offset, k, "cause", throwable_signature, false); \ 2172 macro(_static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true) 2173 2174 void java_lang_Throwable::compute_offsets() { 2175 InstanceKlass* k = vmClasses::Throwable_klass(); 2176 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2177 } 2178 2179 #if INCLUDE_CDS 2180 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) { 2181 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2182 } 2183 #endif 2184 2185 oop java_lang_Throwable::unassigned_stacktrace() { 2186 InstanceKlass* ik = vmClasses::Throwable_klass(); 2187 oop base = ik->static_field_base_raw(); 2188 return base->obj_field(_static_unassigned_stacktrace_offset); 2189 } 2190 2191 oop java_lang_Throwable::backtrace(oop throwable) { 2192 return throwable->obj_field_acquire(_backtrace_offset); 2193 } 2194 2195 2196 void java_lang_Throwable::set_backtrace(oop throwable, oop value) { 2197 throwable->release_obj_field_put(_backtrace_offset, value); 2198 } 2199 2200 int java_lang_Throwable::depth(oop throwable) { 2201 return throwable->int_field(_depth_offset); 2202 } 2203 2204 void java_lang_Throwable::set_depth(oop throwable, int value) { 2205 throwable->int_field_put(_depth_offset, value); 2206 } 2207 2208 oop java_lang_Throwable::message(oop throwable) { 2209 return throwable->obj_field(_detailMessage_offset); 2210 } 2211 2212 const char* java_lang_Throwable::message_as_utf8(oop throwable) { 2213 oop msg = java_lang_Throwable::message(throwable); 2214 const char* msg_utf8 = nullptr; 2215 if (msg != nullptr) { 2216 msg_utf8 = java_lang_String::as_utf8_string(msg); 2217 } 2218 return msg_utf8; 2219 } 2220 2221 oop java_lang_Throwable::cause(oop throwable) { 2222 return throwable->obj_field(_cause_offset); 2223 } 2224 2225 void java_lang_Throwable::set_message(oop throwable, oop value) { 2226 throwable->obj_field_put(_detailMessage_offset, value); 2227 } 2228 2229 2230 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) { 2231 throwable->obj_field_put(_stackTrace_offset, st_element_array); 2232 } 2233 2234 void java_lang_Throwable::clear_stacktrace(oop throwable) { 2235 set_stacktrace(throwable, nullptr); 2236 } 2237 2238 2239 void java_lang_Throwable::print(oop throwable, outputStream* st) { 2240 ResourceMark rm; 2241 Klass* k = throwable->klass(); 2242 assert(k != nullptr, "just checking"); 2243 st->print("%s", k->external_name()); 2244 oop msg = message(throwable); 2245 if (msg != nullptr) { 2246 st->print(": %s", java_lang_String::as_utf8_string(msg)); 2247 } 2248 } 2249 2250 // After this many redefines, the stack trace is unreliable. 2251 const int MAX_VERSION = USHRT_MAX; 2252 2253 static inline bool version_matches(Method* method, int version) { 2254 assert(version < MAX_VERSION, "version is too big"); 2255 return method != nullptr && (method->constants()->version() == version); 2256 } 2257 2258 // This class provides a simple wrapper over the internal structure of 2259 // exception backtrace to insulate users of the backtrace from needing 2260 // to know what it looks like. 2261 // The code of this class is not GC safe. Allocations can only happen 2262 // in expand(). 2263 class BacktraceBuilder: public StackObj { 2264 friend class BacktraceIterator; 2265 private: 2266 Handle _backtrace; 2267 objArrayOop _head; 2268 typeArrayOop _methods; 2269 typeArrayOop _bcis; 2270 objArrayOop _mirrors; 2271 typeArrayOop _names; // Needed to insulate method name against redefinition. 2272 // True if the top frame of the backtrace is omitted because it shall be hidden. 2273 bool _has_hidden_top_frame; 2274 int _index; 2275 NoSafepointVerifier _nsv; 2276 2277 enum { 2278 trace_methods_offset = java_lang_Throwable::trace_methods_offset, 2279 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset, 2280 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset, 2281 trace_names_offset = java_lang_Throwable::trace_names_offset, 2282 trace_conts_offset = java_lang_Throwable::trace_conts_offset, 2283 trace_next_offset = java_lang_Throwable::trace_next_offset, 2284 trace_hidden_offset = java_lang_Throwable::trace_hidden_offset, 2285 trace_size = java_lang_Throwable::trace_size, 2286 trace_chunk_size = java_lang_Throwable::trace_chunk_size 2287 }; 2288 2289 // get info out of chunks 2290 static typeArrayOop get_methods(objArrayHandle chunk) { 2291 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset)); 2292 assert(methods != nullptr, "method array should be initialized in backtrace"); 2293 return methods; 2294 } 2295 static typeArrayOop get_bcis(objArrayHandle chunk) { 2296 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 2297 assert(bcis != nullptr, "bci array should be initialized in backtrace"); 2298 return bcis; 2299 } 2300 static objArrayOop get_mirrors(objArrayHandle chunk) { 2301 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset)); 2302 assert(mirrors != nullptr, "mirror array should be initialized in backtrace"); 2303 return mirrors; 2304 } 2305 static typeArrayOop get_names(objArrayHandle chunk) { 2306 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset)); 2307 assert(names != nullptr, "names array should be initialized in backtrace"); 2308 return names; 2309 } 2310 static bool has_hidden_top_frame(objArrayHandle chunk) { 2311 oop hidden = chunk->obj_at(trace_hidden_offset); 2312 return hidden != nullptr; 2313 } 2314 2315 public: 2316 2317 // constructor for new backtrace 2318 BacktraceBuilder(TRAPS): _head(nullptr), _methods(nullptr), _bcis(nullptr), _mirrors(nullptr), _names(nullptr), _has_hidden_top_frame(false) { 2319 expand(CHECK); 2320 _backtrace = Handle(THREAD, _head); 2321 _index = 0; 2322 } 2323 2324 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) { 2325 _methods = get_methods(backtrace); 2326 _bcis = get_bcis(backtrace); 2327 _mirrors = get_mirrors(backtrace); 2328 _names = get_names(backtrace); 2329 _has_hidden_top_frame = has_hidden_top_frame(backtrace); 2330 assert(_methods->length() == _bcis->length() && 2331 _methods->length() == _mirrors->length() && 2332 _mirrors->length() == _names->length(), 2333 "method and source information arrays should match"); 2334 2335 // head is the preallocated backtrace 2336 _head = backtrace(); 2337 _backtrace = Handle(thread, _head); 2338 _index = 0; 2339 } 2340 2341 void expand(TRAPS) { 2342 objArrayHandle old_head(THREAD, _head); 2343 PauseNoSafepointVerifier pnsv(&_nsv); 2344 2345 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK); 2346 objArrayHandle new_head(THREAD, head); 2347 2348 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK); 2349 typeArrayHandle new_methods(THREAD, methods); 2350 2351 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK); 2352 typeArrayHandle new_bcis(THREAD, bcis); 2353 2354 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK); 2355 objArrayHandle new_mirrors(THREAD, mirrors); 2356 2357 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK); 2358 typeArrayHandle new_names(THREAD, names); 2359 2360 if (!old_head.is_null()) { 2361 old_head->obj_at_put(trace_next_offset, new_head()); 2362 } 2363 new_head->obj_at_put(trace_methods_offset, new_methods()); 2364 new_head->obj_at_put(trace_bcis_offset, new_bcis()); 2365 new_head->obj_at_put(trace_mirrors_offset, new_mirrors()); 2366 new_head->obj_at_put(trace_names_offset, new_names()); 2367 new_head->obj_at_put(trace_hidden_offset, nullptr); 2368 2369 _head = new_head(); 2370 _methods = new_methods(); 2371 _bcis = new_bcis(); 2372 _mirrors = new_mirrors(); 2373 _names = new_names(); 2374 _index = 0; 2375 } 2376 2377 oop backtrace() { 2378 return _backtrace(); 2379 } 2380 2381 inline void push(Method* method, int bci, TRAPS) { 2382 // Smear the -1 bci to 0 since the array only holds unsigned 2383 // shorts. The later line number lookup would just smear the -1 2384 // to a 0 even if it could be recorded. 2385 if (bci == SynchronizationEntryBCI) bci = 0; 2386 2387 if (_index >= trace_chunk_size) { 2388 methodHandle mhandle(THREAD, method); 2389 expand(CHECK); 2390 method = mhandle(); 2391 } 2392 2393 _methods->ushort_at_put(_index, method->orig_method_idnum()); 2394 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version())); 2395 2396 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the 2397 // klass owning the symbols alive so their refcounts aren't decremented. 2398 Symbol* name = method->name(); 2399 _names->symbol_at_put(_index, name); 2400 2401 // We need to save the mirrors in the backtrace to keep the class 2402 // from being unloaded while we still have this stack trace. 2403 assert(method->method_holder()->java_mirror() != nullptr, "never push null for mirror"); 2404 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror()); 2405 2406 _index++; 2407 } 2408 2409 void set_has_hidden_top_frame() { 2410 if (!_has_hidden_top_frame) { 2411 // It would be nice to add java/lang/Boolean::TRUE here 2412 // to indicate that this backtrace has a hidden top frame. 2413 // But this code is used before TRUE is allocated. 2414 // Therefore let's just use an arbitrary legal oop 2415 // available right here. _methods is a short[]. 2416 assert(_methods != nullptr, "we need a legal oop"); 2417 _has_hidden_top_frame = true; 2418 _head->obj_at_put(trace_hidden_offset, _methods); 2419 } 2420 } 2421 }; 2422 2423 struct BacktraceElement : public StackObj { 2424 int _method_id; 2425 int _bci; 2426 int _version; 2427 Symbol* _name; 2428 Handle _mirror; 2429 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) : 2430 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {} 2431 }; 2432 2433 class BacktraceIterator : public StackObj { 2434 int _index; 2435 objArrayHandle _result; 2436 objArrayHandle _mirrors; 2437 typeArrayHandle _methods; 2438 typeArrayHandle _bcis; 2439 typeArrayHandle _names; 2440 2441 void init(objArrayHandle result, Thread* thread) { 2442 // Get method id, bci, version and mirror from chunk 2443 _result = result; 2444 if (_result.not_null()) { 2445 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result)); 2446 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result)); 2447 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result)); 2448 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result)); 2449 _index = 0; 2450 } 2451 } 2452 public: 2453 BacktraceIterator(objArrayHandle result, Thread* thread) { 2454 init(result, thread); 2455 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match"); 2456 } 2457 2458 BacktraceElement next(Thread* thread) { 2459 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)), 2460 _methods->ushort_at(_index), 2461 Backtrace::version_at(_bcis->int_at(_index)), 2462 Backtrace::bci_at(_bcis->int_at(_index)), 2463 _names->symbol_at(_index)); 2464 _index++; 2465 2466 if (_index >= java_lang_Throwable::trace_chunk_size) { 2467 int next_offset = java_lang_Throwable::trace_next_offset; 2468 // Get next chunk 2469 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset))); 2470 init(result, thread); 2471 } 2472 return e; 2473 } 2474 2475 bool repeat() { 2476 return _result.not_null() && _mirrors->obj_at(_index) != nullptr; 2477 } 2478 }; 2479 2480 2481 // Print stack trace element to resource allocated buffer 2482 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id, 2483 int version, int bci, Symbol* name) { 2484 ResourceMark rm; 2485 2486 // Get strings and string lengths 2487 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 2488 const char* klass_name = holder->external_name(); 2489 int buf_len = (int)strlen(klass_name); 2490 2491 char* method_name = name->as_C_string(); 2492 buf_len += (int)strlen(method_name); 2493 2494 char* source_file_name = nullptr; 2495 Symbol* source = Backtrace::get_source_file_name(holder, version); 2496 if (source != nullptr) { 2497 source_file_name = source->as_C_string(); 2498 buf_len += (int)strlen(source_file_name); 2499 } 2500 2501 char *module_name = nullptr, *module_version = nullptr; 2502 ModuleEntry* module = holder->module(); 2503 if (module->is_named()) { 2504 module_name = module->name()->as_C_string(); 2505 buf_len += (int)strlen(module_name); 2506 if (module->version() != nullptr) { 2507 module_version = module->version()->as_C_string(); 2508 buf_len += (int)strlen(module_version); 2509 } 2510 } 2511 2512 // Allocate temporary buffer with extra space for formatting and line number 2513 const size_t buf_size = buf_len + 64; 2514 char* buf = NEW_RESOURCE_ARRAY(char, buf_size); 2515 2516 // Print stack trace line in buffer 2517 size_t buf_off = os::snprintf_checked(buf, buf_size, "\tat %s.%s(", klass_name, method_name); 2518 2519 // Print module information 2520 if (module_name != nullptr) { 2521 if (module_version != nullptr) { 2522 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s@%s/", module_name, module_version); 2523 } else { 2524 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s/", module_name); 2525 } 2526 } 2527 2528 // The method can be null if the requested class version is gone 2529 Method* method = holder->method_with_orig_idnum(method_id, version); 2530 if (!version_matches(method, version)) { 2531 strcat(buf, "Redefined)"); 2532 } else { 2533 int line_number = Backtrace::get_line_number(method, bci); 2534 if (line_number == -2) { 2535 strcat(buf, "Native Method)"); 2536 } else { 2537 if (source_file_name != nullptr && (line_number != -1)) { 2538 // Sourcename and linenumber 2539 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s:%d)", source_file_name, line_number); 2540 } else if (source_file_name != nullptr) { 2541 // Just sourcename 2542 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s)", source_file_name); 2543 } else { 2544 // Neither sourcename nor linenumber 2545 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "Unknown Source)"); 2546 } 2547 nmethod* nm = method->code(); 2548 if (WizardMode && nm != nullptr) { 2549 os::snprintf_checked(buf + buf_off, buf_size - buf_off, "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm); 2550 } 2551 } 2552 } 2553 2554 st->print_cr("%s", buf); 2555 } 2556 2557 void java_lang_Throwable::print_stack_element(outputStream *st, Method* method, int bci) { 2558 Handle mirror (Thread::current(), method->method_holder()->java_mirror()); 2559 int method_id = method->orig_method_idnum(); 2560 int version = method->constants()->version(); 2561 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name()); 2562 } 2563 2564 /** 2565 * Print the throwable message and its stack trace plus all causes by walking the 2566 * cause chain. The output looks the same as of Throwable.printStackTrace(). 2567 */ 2568 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) { 2569 // First, print the message. 2570 print(throwable(), st); 2571 st->cr(); 2572 2573 // Now print the stack trace. 2574 JavaThread* THREAD = JavaThread::current(); // For exception macros. 2575 while (throwable.not_null()) { 2576 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable()))); 2577 if (result.is_null()) { 2578 st->print_raw_cr("\t<<no stack trace available>>"); 2579 return; 2580 } 2581 BacktraceIterator iter(result, THREAD); 2582 2583 while (iter.repeat()) { 2584 BacktraceElement bte = iter.next(THREAD); 2585 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name); 2586 } 2587 if (THREAD->can_call_java()) { 2588 // Call getCause() which doesn't necessarily return the _cause field. 2589 ExceptionMark em(THREAD); 2590 JavaValue cause(T_OBJECT); 2591 JavaCalls::call_virtual(&cause, 2592 throwable, 2593 throwable->klass(), 2594 vmSymbols::getCause_name(), 2595 vmSymbols::void_throwable_signature(), 2596 THREAD); 2597 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 2598 if (HAS_PENDING_EXCEPTION) { 2599 CLEAR_PENDING_EXCEPTION; 2600 throwable = Handle(); 2601 } else { 2602 throwable = Handle(THREAD, cause.get_oop()); 2603 if (throwable.not_null()) { 2604 st->print("Caused by: "); 2605 print(throwable(), st); 2606 st->cr(); 2607 } 2608 } 2609 } else { 2610 st->print_raw_cr("<<cannot call Java to get cause>>"); 2611 return; 2612 } 2613 } 2614 } 2615 2616 /** 2617 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace(). 2618 */ 2619 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) { 2620 assert(throwable->is_a(vmClasses::Throwable_klass()), "Throwable instance expected"); 2621 JavaValue result(T_VOID); 2622 JavaCalls::call_virtual(&result, 2623 throwable, 2624 vmClasses::Throwable_klass(), 2625 vmSymbols::printStackTrace_name(), 2626 vmSymbols::void_method_signature(), 2627 THREAD); 2628 } 2629 2630 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) { 2631 if (!StackTraceInThrowable) return; 2632 ResourceMark rm(THREAD); 2633 2634 // Start out by clearing the backtrace for this object, in case the VM 2635 // runs out of memory while allocating the stack trace 2636 set_backtrace(throwable(), nullptr); 2637 // Clear lazily constructed Java level stacktrace if refilling occurs 2638 // This is unnecessary in 1.7+ but harmless 2639 clear_stacktrace(throwable()); 2640 2641 int max_depth = MaxJavaStackTraceDepth; 2642 JavaThread* thread = THREAD; 2643 2644 BacktraceBuilder bt(CHECK); 2645 2646 // If there is no Java frame just return the method that was being called 2647 // with bci 0 2648 if (!thread->has_last_Java_frame()) { 2649 if (max_depth >= 1 && method() != nullptr) { 2650 bt.push(method(), 0, CHECK); 2651 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1); 2652 set_depth(throwable(), 1); 2653 set_backtrace(throwable(), bt.backtrace()); 2654 } 2655 return; 2656 } 2657 2658 // Instead of using vframe directly, this version of fill_in_stack_trace 2659 // basically handles everything by hand. This significantly improved the 2660 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows. 2661 // See bug 6333838 for more details. 2662 // The "ASSERT" here is to verify this method generates the exactly same stack 2663 // trace as utilizing vframe. 2664 #ifdef ASSERT 2665 vframeStream st(thread, false /* stop_at_java_call_stub */, false /* process_frames */); 2666 #endif 2667 int total_count = 0; 2668 RegisterMap map(thread, 2669 RegisterMap::UpdateMap::skip, 2670 RegisterMap::ProcessFrames::skip, 2671 RegisterMap::WalkContinuation::include); 2672 int decode_offset = 0; 2673 nmethod* nm = nullptr; 2674 bool skip_fillInStackTrace_check = false; 2675 bool skip_throwableInit_check = false; 2676 bool skip_hidden = !ShowHiddenFrames; 2677 bool show_carrier = ShowCarrierFrames; 2678 ContinuationEntry* cont_entry = thread->last_continuation(); 2679 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) { 2680 Method* method = nullptr; 2681 int bci = 0; 2682 2683 // Compiled java method case. 2684 if (decode_offset != 0) { 2685 DebugInfoReadStream stream(nm, decode_offset); 2686 decode_offset = stream.read_int(); 2687 method = (Method*)nm->metadata_at(stream.read_int()); 2688 bci = stream.read_bci(); 2689 } else { 2690 if (fr.is_first_frame()) break; 2691 2692 if (Continuation::is_continuation_enterSpecial(fr)) { 2693 assert(cont_entry == Continuation::get_continuation_entry_for_entry_frame(thread, fr), ""); 2694 if (!show_carrier && cont_entry->is_virtual_thread()) { 2695 break; 2696 } 2697 cont_entry = cont_entry->parent(); 2698 } 2699 2700 address pc = fr.pc(); 2701 if (fr.is_interpreted_frame()) { 2702 address bcp; 2703 if (!map.in_cont()) { 2704 bcp = fr.interpreter_frame_bcp(); 2705 method = fr.interpreter_frame_method(); 2706 } else { 2707 bcp = map.stack_chunk()->interpreter_frame_bcp(fr); 2708 method = map.stack_chunk()->interpreter_frame_method(fr); 2709 } 2710 bci = method->bci_from(bcp); 2711 fr = fr.sender(&map); 2712 } else { 2713 CodeBlob* cb = fr.cb(); 2714 // HMMM QQQ might be nice to have frame return nm as null if cb is non-null 2715 // but non nmethod 2716 fr = fr.sender(&map); 2717 if (cb == nullptr || !cb->is_nmethod()) { 2718 continue; 2719 } 2720 nm = cb->as_nmethod(); 2721 assert(nm->method() != nullptr, "must be"); 2722 if (nm->method()->is_native()) { 2723 method = nm->method(); 2724 bci = 0; 2725 } else { 2726 PcDesc* pd = nm->pc_desc_at(pc); 2727 decode_offset = pd->scope_decode_offset(); 2728 // if decode_offset is not equal to 0, it will execute the 2729 // "compiled java method case" at the beginning of the loop. 2730 continue; 2731 } 2732 } 2733 } 2734 #ifdef ASSERT 2735 if (!st.at_end()) { // TODO LOOM remove once we show only vthread trace 2736 assert(st.method() == method && st.bci() == bci, "Wrong stack trace"); 2737 st.next(); 2738 } 2739 #endif 2740 2741 // the format of the stacktrace will be: 2742 // - 1 or more fillInStackTrace frames for the exception class (skipped) 2743 // - 0 or more <init> methods for the exception class (skipped) 2744 // - rest of the stack 2745 2746 if (!skip_fillInStackTrace_check) { 2747 if (method->name() == vmSymbols::fillInStackTrace_name() && 2748 throwable->is_a(method->method_holder())) { 2749 continue; 2750 } 2751 else { 2752 skip_fillInStackTrace_check = true; // gone past them all 2753 } 2754 } 2755 if (!skip_throwableInit_check) { 2756 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering"); 2757 2758 // skip <init> methods of the exception class and superclasses 2759 // This is similar to classic VM. 2760 if (method->name() == vmSymbols::object_initializer_name() && 2761 throwable->is_a(method->method_holder())) { 2762 continue; 2763 } else { 2764 // there are none or we've seen them all - either way stop checking 2765 skip_throwableInit_check = true; 2766 } 2767 } 2768 if (method->is_hidden() || method->is_continuation_enter_intrinsic()) { 2769 if (skip_hidden) { 2770 if (total_count == 0) { 2771 // The top frame will be hidden from the stack trace. 2772 bt.set_has_hidden_top_frame(); 2773 } 2774 continue; 2775 } 2776 } 2777 2778 bt.push(method, bci, CHECK); 2779 total_count++; 2780 } 2781 2782 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count); 2783 2784 // Put completed stack trace into throwable object 2785 set_backtrace(throwable(), bt.backtrace()); 2786 set_depth(throwable(), total_count); 2787 } 2788 2789 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) { 2790 // No-op if stack trace is disabled 2791 if (!StackTraceInThrowable) { 2792 return; 2793 } 2794 2795 // Disable stack traces for some preallocated out of memory errors 2796 if (!Universe::should_fill_in_stack_trace(throwable)) { 2797 return; 2798 } 2799 2800 JavaThread* THREAD = JavaThread::current(); // For exception macros. 2801 PreserveExceptionMark pm(THREAD); 2802 2803 fill_in_stack_trace(throwable, method, THREAD); 2804 // Ignore exceptions thrown during stack trace filling (OOM) and reinstall the 2805 // original exception via the PreserveExceptionMark destructor. 2806 CLEAR_PENDING_EXCEPTION; 2807 } 2808 2809 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 2810 // Allocate stack trace - backtrace is created but not filled in 2811 2812 // No-op if stack trace is disabled 2813 if (!StackTraceInThrowable) return; 2814 BacktraceBuilder bt(CHECK); // creates a backtrace 2815 set_backtrace(throwable(), bt.backtrace()); 2816 } 2817 2818 2819 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 2820 // Fill in stack trace into preallocated backtrace (no GC) 2821 2822 // No-op if stack trace is disabled 2823 if (!StackTraceInThrowable) return; 2824 2825 assert(throwable->is_a(vmClasses::Throwable_klass()), "sanity check"); 2826 2827 JavaThread* THREAD = JavaThread::current(); // For exception macros. 2828 2829 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable())); 2830 assert(backtrace.not_null(), "backtrace should have been preallocated"); 2831 2832 ResourceMark rm(THREAD); 2833 vframeStream st(THREAD, false /* stop_at_java_call_stub */, false /* process_frames */); 2834 2835 BacktraceBuilder bt(THREAD, backtrace); 2836 2837 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 2838 // methods as preallocated errors aren't created by "java" code. 2839 2840 // fill in as much stack trace as possible 2841 int chunk_count = 0; 2842 for (;!st.at_end(); st.next()) { 2843 bt.push(st.method(), st.bci(), CHECK); 2844 chunk_count++; 2845 2846 // Bail-out for deep stacks 2847 if (chunk_count >= trace_chunk_size) break; 2848 } 2849 set_depth(throwable(), chunk_count); 2850 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count); 2851 2852 // We support the Throwable immutability protocol defined for Java 7. 2853 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace()); 2854 assert(java_lang_Throwable::unassigned_stacktrace() != nullptr, "not initialized"); 2855 } 2856 2857 void java_lang_Throwable::get_stack_trace_elements(int depth, Handle backtrace, 2858 objArrayHandle stack_trace_array_h, TRAPS) { 2859 2860 if (backtrace.is_null() || stack_trace_array_h.is_null()) { 2861 THROW(vmSymbols::java_lang_NullPointerException()); 2862 } 2863 2864 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent"); 2865 2866 if (stack_trace_array_h->length() != depth) { 2867 THROW(vmSymbols::java_lang_IndexOutOfBoundsException()); 2868 } 2869 2870 objArrayHandle result(THREAD, objArrayOop(backtrace())); 2871 BacktraceIterator iter(result, THREAD); 2872 2873 int index = 0; 2874 while (iter.repeat()) { 2875 BacktraceElement bte = iter.next(THREAD); 2876 2877 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++)); 2878 2879 if (stack_trace_element.is_null()) { 2880 THROW(vmSymbols::java_lang_NullPointerException()); 2881 } 2882 2883 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror())); 2884 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version)); 2885 2886 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, 2887 method, 2888 bte._version, 2889 bte._bci, 2890 bte._name, 2891 CHECK); 2892 } 2893 } 2894 2895 Handle java_lang_Throwable::create_initialization_error(JavaThread* current, Handle throwable) { 2896 // Creates an ExceptionInInitializerError to be recorded as the initialization error when class initialization 2897 // failed due to the passed in 'throwable'. We cannot save 'throwable' directly due to issues with keeping alive 2898 // all objects referenced via its stacktrace. So instead we save a new EIIE instance, with the same message and 2899 // symbolic stacktrace of 'throwable'. 2900 assert(throwable.not_null(), "shouldn't be"); 2901 2902 // Now create the message from the original exception and thread name. 2903 ResourceMark rm(current); 2904 const char *message = nullptr; 2905 oop detailed_message = java_lang_Throwable::message(throwable()); 2906 if (detailed_message != nullptr) { 2907 message = java_lang_String::as_utf8_string(detailed_message); 2908 } 2909 stringStream st; 2910 st.print("Exception %s%s ", throwable()->klass()->name()->as_klass_external_name(), 2911 message == nullptr ? "" : ":"); 2912 if (message == nullptr) { 2913 st.print("[in thread \"%s\"]", current->name()); 2914 } else { 2915 st.print("%s [in thread \"%s\"]", message, current->name()); 2916 } 2917 2918 Symbol* exception_name = vmSymbols::java_lang_ExceptionInInitializerError(); 2919 Handle init_error = Exceptions::new_exception(current, exception_name, st.as_string()); 2920 // If new_exception returns a different exception while creating the exception, 2921 // abandon the attempt to save the initialization error and return null. 2922 if (init_error->klass()->name() != exception_name) { 2923 log_info(class, init)("Exception %s thrown while saving initialization exception", 2924 init_error->klass()->external_name()); 2925 return Handle(); 2926 } 2927 2928 // Call to java to fill in the stack trace and clear declaringClassObject to 2929 // not keep classes alive in the stack trace. 2930 // call this: public StackTraceElement[] getStackTrace() 2931 JavaValue result(T_ARRAY); 2932 JavaCalls::call_virtual(&result, throwable, 2933 vmClasses::Throwable_klass(), 2934 vmSymbols::getStackTrace_name(), 2935 vmSymbols::getStackTrace_signature(), 2936 current); 2937 if (!current->has_pending_exception()){ 2938 Handle stack_trace(current, result.get_oop()); 2939 assert(stack_trace->is_objArray(), "Should be an array"); 2940 java_lang_Throwable::set_stacktrace(init_error(), stack_trace()); 2941 // Clear backtrace because the stacktrace should be used instead. 2942 set_backtrace(init_error(), nullptr); 2943 } else { 2944 log_info(class, init)("Exception thrown while getting stack trace for initialization exception %s", 2945 init_error->klass()->external_name()); 2946 current->clear_pending_exception(); 2947 } 2948 2949 return init_error; 2950 } 2951 2952 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) { 2953 JavaThread* current = JavaThread::current(); 2954 objArrayHandle result(current, objArrayOop(backtrace(throwable))); 2955 BacktraceIterator iter(result, current); 2956 // No backtrace available. 2957 if (!iter.repeat()) return false; 2958 2959 // If the exception happened in a frame that has been hidden, i.e., 2960 // omitted from the back trace, we can not compute the message. 2961 oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset); 2962 if (hidden != nullptr) { 2963 return false; 2964 } 2965 2966 // Get first backtrace element. 2967 BacktraceElement bte = iter.next(current); 2968 2969 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror())); 2970 assert(holder != nullptr, "first element should be non-null"); 2971 Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version); 2972 2973 // Original version is no longer available. 2974 if (m == nullptr || !version_matches(m, bte._version)) { 2975 return false; 2976 } 2977 2978 *method = m; 2979 *bci = bte._bci; 2980 return true; 2981 } 2982 2983 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) { 2984 // Allocate java.lang.StackTraceElement instance 2985 InstanceKlass* k = vmClasses::StackTraceElement_klass(); 2986 assert(k != nullptr, "must be loaded in 1.4+"); 2987 if (k->should_be_initialized()) { 2988 k->initialize(CHECK_NULL); 2989 } 2990 2991 Handle element = k->allocate_instance_handle(CHECK_NULL); 2992 2993 int version = method->constants()->version(); 2994 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_NULL); 2995 return element(); 2996 } 2997 2998 void java_lang_StackTraceElement::fill_in(Handle element, 2999 InstanceKlass* holder, const methodHandle& method, 3000 int version, int bci, Symbol* name, TRAPS) { 3001 assert(element->is_a(vmClasses::StackTraceElement_klass()), "sanity check"); 3002 3003 ResourceMark rm(THREAD); 3004 HandleMark hm(THREAD); 3005 3006 // Fill in class name 3007 Handle java_class(THREAD, holder->java_mirror()); 3008 oop classname = java_lang_Class::name(java_class, CHECK); 3009 java_lang_StackTraceElement::set_declaringClass(element(), classname); 3010 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class()); 3011 3012 oop loader = holder->class_loader(); 3013 if (loader != nullptr) { 3014 oop loader_name = java_lang_ClassLoader::name(loader); 3015 if (loader_name != nullptr) 3016 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name); 3017 } 3018 3019 // Fill in method name 3020 oop methodname = StringTable::intern(name, CHECK); 3021 java_lang_StackTraceElement::set_methodName(element(), methodname); 3022 3023 // Fill in module name and version 3024 ModuleEntry* module = holder->module(); 3025 if (module->is_named()) { 3026 oop module_name = StringTable::intern(module->name(), CHECK); 3027 java_lang_StackTraceElement::set_moduleName(element(), module_name); 3028 oop module_version; 3029 if (module->version() != nullptr) { 3030 module_version = StringTable::intern(module->version(), CHECK); 3031 } else { 3032 module_version = nullptr; 3033 } 3034 java_lang_StackTraceElement::set_moduleVersion(element(), module_version); 3035 } 3036 3037 if (method() == nullptr || !version_matches(method(), version)) { 3038 // The method was redefined, accurate line number information isn't available 3039 java_lang_StackTraceElement::set_fileName(element(), nullptr); 3040 java_lang_StackTraceElement::set_lineNumber(element(), -1); 3041 } else { 3042 Symbol* source; 3043 oop source_file; 3044 int line_number; 3045 decode_file_and_line(java_class, holder, version, method, bci, source, source_file, line_number, CHECK); 3046 3047 java_lang_StackTraceElement::set_fileName(element(), source_file); 3048 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 3049 } 3050 } 3051 3052 void java_lang_StackTraceElement::decode_file_and_line(Handle java_class, 3053 InstanceKlass* holder, 3054 int version, 3055 const methodHandle& method, 3056 int bci, 3057 Symbol*& source, 3058 oop& source_file, 3059 int& line_number, TRAPS) { 3060 // Fill in source file name and line number. 3061 source = Backtrace::get_source_file_name(holder, version); 3062 source_file = java_lang_Class::source_file(java_class()); 3063 if (source != nullptr) { 3064 // Class was not redefined. We can trust its cache if set, 3065 // else we have to initialize it. 3066 if (source_file == nullptr) { 3067 source_file = StringTable::intern(source, CHECK); 3068 java_lang_Class::set_source_file(java_class(), source_file); 3069 } 3070 } else { 3071 // Class was redefined. Dump the cache if it was set. 3072 if (source_file != nullptr) { 3073 source_file = nullptr; 3074 java_lang_Class::set_source_file(java_class(), source_file); 3075 } 3076 } 3077 line_number = Backtrace::get_line_number(method(), bci); 3078 } 3079 3080 #if INCLUDE_JVMCI 3081 void java_lang_StackTraceElement::decode(const methodHandle& method, int bci, 3082 Symbol*& filename, int& line_number, TRAPS) { 3083 ResourceMark rm(THREAD); 3084 HandleMark hm(THREAD); 3085 3086 filename = nullptr; 3087 line_number = -1; 3088 3089 oop source_file; 3090 int version = method->constants()->version(); 3091 InstanceKlass* holder = method->method_holder(); 3092 Handle java_class(THREAD, holder->java_mirror()); 3093 decode_file_and_line(java_class, holder, version, method, bci, filename, source_file, line_number, CHECK); 3094 } 3095 #endif // INCLUDE_JVMCI 3096 3097 // java_lang_ClassFrameInfo 3098 3099 int java_lang_ClassFrameInfo::_classOrMemberName_offset; 3100 int java_lang_ClassFrameInfo::_flags_offset; 3101 3102 #define CLASSFRAMEINFO_FIELDS_DO(macro) \ 3103 macro(_classOrMemberName_offset, k, "classOrMemberName", object_signature, false); \ 3104 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false) 3105 3106 void java_lang_ClassFrameInfo::compute_offsets() { 3107 InstanceKlass* k = vmClasses::ClassFrameInfo_klass(); 3108 CLASSFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3109 } 3110 3111 #if INCLUDE_CDS 3112 void java_lang_ClassFrameInfo::serialize_offsets(SerializeClosure* f) { 3113 CLASSFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3114 } 3115 #endif 3116 3117 static int get_flags(const methodHandle& m) { 3118 int flags = (jushort)( m->access_flags().as_short() & JVM_RECOGNIZED_METHOD_MODIFIERS ); 3119 if (m->is_initializer()) { 3120 flags |= java_lang_invoke_MemberName::MN_IS_CONSTRUCTOR; 3121 } else { 3122 flags |= java_lang_invoke_MemberName::MN_IS_METHOD; 3123 } 3124 if (m->caller_sensitive()) { 3125 flags |= java_lang_invoke_MemberName::MN_CALLER_SENSITIVE; 3126 } 3127 if (m->is_hidden()) { 3128 flags |= java_lang_invoke_MemberName::MN_HIDDEN_MEMBER; 3129 } 3130 assert((flags & 0xFF000000) == 0, "unexpected flags"); 3131 return flags; 3132 } 3133 3134 oop java_lang_ClassFrameInfo::classOrMemberName(oop obj) { 3135 return obj->obj_field(_classOrMemberName_offset); 3136 } 3137 3138 int java_lang_ClassFrameInfo::flags(oop obj) { 3139 return obj->int_field(_flags_offset); 3140 } 3141 3142 void java_lang_ClassFrameInfo::init_class(Handle stackFrame, const methodHandle& m) { 3143 stackFrame->obj_field_put(_classOrMemberName_offset, m->method_holder()->java_mirror()); 3144 // flags is initialized when ClassFrameInfo object is constructed and retain the value 3145 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m); 3146 stackFrame->int_field_put(_flags_offset, flags); 3147 } 3148 3149 void java_lang_ClassFrameInfo::init_method(Handle stackFrame, const methodHandle& m, TRAPS) { 3150 oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(m, CHECK); 3151 stackFrame->obj_field_put(_classOrMemberName_offset, rmethod_name); 3152 // flags is initialized when ClassFrameInfo object is constructed and retain the value 3153 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m); 3154 stackFrame->int_field_put(_flags_offset, flags); 3155 } 3156 3157 3158 // java_lang_StackFrameInfo 3159 3160 int java_lang_StackFrameInfo::_type_offset; 3161 int java_lang_StackFrameInfo::_name_offset; 3162 int java_lang_StackFrameInfo::_bci_offset; 3163 int java_lang_StackFrameInfo::_version_offset; 3164 int java_lang_StackFrameInfo::_contScope_offset; 3165 3166 #define STACKFRAMEINFO_FIELDS_DO(macro) \ 3167 macro(_type_offset, k, "type", object_signature, false); \ 3168 macro(_name_offset, k, "name", string_signature, false); \ 3169 macro(_bci_offset, k, "bci", int_signature, false); \ 3170 macro(_contScope_offset, k, "contScope", continuationscope_signature, false) 3171 3172 void java_lang_StackFrameInfo::compute_offsets() { 3173 InstanceKlass* k = vmClasses::StackFrameInfo_klass(); 3174 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3175 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3176 } 3177 3178 #if INCLUDE_CDS 3179 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) { 3180 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3181 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3182 } 3183 #endif 3184 3185 Method* java_lang_StackFrameInfo::get_method(oop obj) { 3186 oop m = java_lang_ClassFrameInfo::classOrMemberName(obj); 3187 Method* method = java_lang_invoke_ResolvedMethodName::vmtarget(m); 3188 return method; 3189 } 3190 3191 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS) { 3192 // set Method* or mid/cpref 3193 HandleMark hm(THREAD); 3194 Handle cont_h(THREAD, cont); 3195 java_lang_ClassFrameInfo::init_method(stackFrame, method, CHECK); 3196 3197 // set bci 3198 java_lang_StackFrameInfo::set_bci(stackFrame(), bci); 3199 // method may be redefined; store the version 3200 int version = method->constants()->version(); 3201 assert((jushort)version == version, "version should be short"); 3202 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version); 3203 3204 oop contScope = cont_h() != nullptr ? jdk_internal_vm_Continuation::scope(cont_h()) : (oop)nullptr; 3205 java_lang_StackFrameInfo::set_contScope(stackFrame(), contScope); 3206 } 3207 3208 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) { 3209 ResourceMark rm(THREAD); 3210 HandleMark hm(THREAD); 3211 3212 Method* method = java_lang_StackFrameInfo::get_method(stackFrame()); 3213 InstanceKlass* holder = method->method_holder(); 3214 short version = stackFrame->short_field(_version_offset); 3215 int bci = stackFrame->int_field(_bci_offset); 3216 Symbol* name = method->name(); 3217 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, methodHandle(THREAD, method), version, bci, name, CHECK); 3218 } 3219 3220 oop java_lang_StackFrameInfo::type(oop obj) { 3221 return obj->obj_field(_type_offset); 3222 } 3223 3224 void java_lang_StackFrameInfo::set_type(oop obj, oop value) { 3225 obj->obj_field_put(_type_offset, value); 3226 } 3227 3228 oop java_lang_StackFrameInfo::name(oop obj) { 3229 return obj->obj_field(_name_offset); 3230 } 3231 3232 void java_lang_StackFrameInfo::set_name(oop obj, oop value) { 3233 obj->obj_field_put(_name_offset, value); 3234 } 3235 3236 void java_lang_StackFrameInfo::set_version(oop obj, short value) { 3237 obj->short_field_put(_version_offset, value); 3238 } 3239 3240 void java_lang_StackFrameInfo::set_bci(oop obj, int value) { 3241 assert(value >= 0 && value < max_jushort, "must be a valid bci value"); 3242 obj->int_field_put(_bci_offset, value); 3243 } 3244 3245 void java_lang_StackFrameInfo::set_contScope(oop obj, oop value) { 3246 obj->obj_field_put(_contScope_offset, value); 3247 } 3248 3249 int java_lang_LiveStackFrameInfo::_monitors_offset; 3250 int java_lang_LiveStackFrameInfo::_locals_offset; 3251 int java_lang_LiveStackFrameInfo::_operands_offset; 3252 int java_lang_LiveStackFrameInfo::_mode_offset; 3253 3254 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \ 3255 macro(_monitors_offset, k, "monitors", object_array_signature, false); \ 3256 macro(_locals_offset, k, "locals", object_array_signature, false); \ 3257 macro(_operands_offset, k, "operands", object_array_signature, false); \ 3258 macro(_mode_offset, k, "mode", int_signature, false) 3259 3260 void java_lang_LiveStackFrameInfo::compute_offsets() { 3261 InstanceKlass* k = vmClasses::LiveStackFrameInfo_klass(); 3262 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3263 } 3264 3265 #if INCLUDE_CDS 3266 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) { 3267 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3268 } 3269 #endif 3270 3271 void java_lang_LiveStackFrameInfo::set_monitors(oop obj, oop value) { 3272 obj->obj_field_put(_monitors_offset, value); 3273 } 3274 3275 void java_lang_LiveStackFrameInfo::set_locals(oop obj, oop value) { 3276 obj->obj_field_put(_locals_offset, value); 3277 } 3278 3279 void java_lang_LiveStackFrameInfo::set_operands(oop obj, oop value) { 3280 obj->obj_field_put(_operands_offset, value); 3281 } 3282 3283 void java_lang_LiveStackFrameInfo::set_mode(oop obj, int value) { 3284 obj->int_field_put(_mode_offset, value); 3285 } 3286 3287 3288 // java_lang_AccessibleObject 3289 3290 int java_lang_reflect_AccessibleObject::_override_offset; 3291 3292 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \ 3293 macro(_override_offset, k, "override", bool_signature, false) 3294 3295 void java_lang_reflect_AccessibleObject::compute_offsets() { 3296 InstanceKlass* k = vmClasses::reflect_AccessibleObject_klass(); 3297 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3298 } 3299 3300 #if INCLUDE_CDS 3301 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) { 3302 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3303 } 3304 #endif 3305 3306 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 3307 return (jboolean) reflect->bool_field(_override_offset); 3308 } 3309 3310 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 3311 reflect->bool_field_put(_override_offset, (int) value); 3312 } 3313 3314 // java_lang_reflect_Method 3315 3316 int java_lang_reflect_Method::_clazz_offset; 3317 int java_lang_reflect_Method::_name_offset; 3318 int java_lang_reflect_Method::_returnType_offset; 3319 int java_lang_reflect_Method::_parameterTypes_offset; 3320 int java_lang_reflect_Method::_exceptionTypes_offset; 3321 int java_lang_reflect_Method::_slot_offset; 3322 int java_lang_reflect_Method::_modifiers_offset; 3323 int java_lang_reflect_Method::_signature_offset; 3324 int java_lang_reflect_Method::_annotations_offset; 3325 int java_lang_reflect_Method::_parameter_annotations_offset; 3326 int java_lang_reflect_Method::_annotation_default_offset; 3327 3328 #define METHOD_FIELDS_DO(macro) \ 3329 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3330 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3331 macro(_returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \ 3332 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 3333 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 3334 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 3335 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3336 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 3337 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \ 3338 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \ 3339 macro(_annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false); 3340 3341 void java_lang_reflect_Method::compute_offsets() { 3342 InstanceKlass* k = vmClasses::reflect_Method_klass(); 3343 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3344 } 3345 3346 #if INCLUDE_CDS 3347 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) { 3348 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3349 } 3350 #endif 3351 3352 Handle java_lang_reflect_Method::create(TRAPS) { 3353 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3354 Klass* klass = vmClasses::reflect_Method_klass(); 3355 // This class is eagerly initialized during VM initialization, since we keep a reference 3356 // to one of the methods 3357 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized"); 3358 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD); 3359 } 3360 3361 oop java_lang_reflect_Method::clazz(oop reflect) { 3362 return reflect->obj_field(_clazz_offset); 3363 } 3364 3365 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 3366 reflect->obj_field_put(_clazz_offset, value); 3367 } 3368 3369 int java_lang_reflect_Method::slot(oop reflect) { 3370 return reflect->int_field(_slot_offset); 3371 } 3372 3373 void java_lang_reflect_Method::set_slot(oop reflect, int value) { 3374 reflect->int_field_put(_slot_offset, value); 3375 } 3376 3377 void java_lang_reflect_Method::set_name(oop method, oop value) { 3378 method->obj_field_put(_name_offset, value); 3379 } 3380 3381 oop java_lang_reflect_Method::return_type(oop method) { 3382 return method->obj_field(_returnType_offset); 3383 } 3384 3385 void java_lang_reflect_Method::set_return_type(oop method, oop value) { 3386 method->obj_field_put(_returnType_offset, value); 3387 } 3388 3389 oop java_lang_reflect_Method::parameter_types(oop method) { 3390 return method->obj_field(_parameterTypes_offset); 3391 } 3392 3393 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 3394 method->obj_field_put(_parameterTypes_offset, value); 3395 } 3396 3397 void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 3398 method->obj_field_put(_exceptionTypes_offset, value); 3399 } 3400 3401 void java_lang_reflect_Method::set_modifiers(oop method, int value) { 3402 method->int_field_put(_modifiers_offset, value); 3403 } 3404 3405 void java_lang_reflect_Method::set_signature(oop method, oop value) { 3406 method->obj_field_put(_signature_offset, value); 3407 } 3408 3409 void java_lang_reflect_Method::set_annotations(oop method, oop value) { 3410 method->obj_field_put(_annotations_offset, value); 3411 } 3412 3413 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 3414 method->obj_field_put(_parameter_annotations_offset, value); 3415 } 3416 3417 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 3418 method->obj_field_put(_annotation_default_offset, value); 3419 } 3420 3421 int java_lang_reflect_Constructor::_clazz_offset; 3422 int java_lang_reflect_Constructor::_parameterTypes_offset; 3423 int java_lang_reflect_Constructor::_exceptionTypes_offset; 3424 int java_lang_reflect_Constructor::_slot_offset; 3425 int java_lang_reflect_Constructor::_modifiers_offset; 3426 int java_lang_reflect_Constructor::_signature_offset; 3427 int java_lang_reflect_Constructor::_annotations_offset; 3428 int java_lang_reflect_Constructor::_parameter_annotations_offset; 3429 3430 #define CONSTRUCTOR_FIELDS_DO(macro) \ 3431 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3432 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 3433 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 3434 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 3435 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3436 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 3437 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \ 3438 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); 3439 3440 void java_lang_reflect_Constructor::compute_offsets() { 3441 InstanceKlass* k = vmClasses::reflect_Constructor_klass(); 3442 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3443 } 3444 3445 #if INCLUDE_CDS 3446 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) { 3447 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3448 } 3449 #endif 3450 3451 Handle java_lang_reflect_Constructor::create(TRAPS) { 3452 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3453 Symbol* name = vmSymbols::java_lang_reflect_Constructor(); 3454 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3455 InstanceKlass* ik = InstanceKlass::cast(k); 3456 // Ensure it is initialized 3457 ik->initialize(CHECK_NH); 3458 return ik->allocate_instance_handle(THREAD); 3459 } 3460 3461 oop java_lang_reflect_Constructor::clazz(oop reflect) { 3462 return reflect->obj_field(_clazz_offset); 3463 } 3464 3465 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 3466 reflect->obj_field_put(_clazz_offset, value); 3467 } 3468 3469 oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 3470 return constructor->obj_field(_parameterTypes_offset); 3471 } 3472 3473 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 3474 constructor->obj_field_put(_parameterTypes_offset, value); 3475 } 3476 3477 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 3478 constructor->obj_field_put(_exceptionTypes_offset, value); 3479 } 3480 3481 int java_lang_reflect_Constructor::slot(oop reflect) { 3482 return reflect->int_field(_slot_offset); 3483 } 3484 3485 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 3486 reflect->int_field_put(_slot_offset, value); 3487 } 3488 3489 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 3490 constructor->int_field_put(_modifiers_offset, value); 3491 } 3492 3493 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 3494 constructor->obj_field_put(_signature_offset, value); 3495 } 3496 3497 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 3498 constructor->obj_field_put(_annotations_offset, value); 3499 } 3500 3501 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 3502 method->obj_field_put(_parameter_annotations_offset, value); 3503 } 3504 3505 int java_lang_reflect_Field::_clazz_offset; 3506 int java_lang_reflect_Field::_name_offset; 3507 int java_lang_reflect_Field::_type_offset; 3508 int java_lang_reflect_Field::_slot_offset; 3509 int java_lang_reflect_Field::_modifiers_offset; 3510 int java_lang_reflect_Field::_trusted_final_offset; 3511 int java_lang_reflect_Field::_signature_offset; 3512 int java_lang_reflect_Field::_annotations_offset; 3513 3514 #define FIELD_FIELDS_DO(macro) \ 3515 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3516 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3517 macro(_type_offset, k, vmSymbols::type_name(), class_signature, false); \ 3518 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 3519 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3520 macro(_trusted_final_offset, k, vmSymbols::trusted_final_name(), bool_signature, false); \ 3521 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 3522 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); 3523 3524 void java_lang_reflect_Field::compute_offsets() { 3525 InstanceKlass* k = vmClasses::reflect_Field_klass(); 3526 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3527 } 3528 3529 #if INCLUDE_CDS 3530 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) { 3531 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3532 } 3533 #endif 3534 3535 Handle java_lang_reflect_Field::create(TRAPS) { 3536 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3537 Symbol* name = vmSymbols::java_lang_reflect_Field(); 3538 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3539 InstanceKlass* ik = InstanceKlass::cast(k); 3540 // Ensure it is initialized 3541 ik->initialize(CHECK_NH); 3542 return ik->allocate_instance_handle(THREAD); 3543 } 3544 3545 oop java_lang_reflect_Field::clazz(oop reflect) { 3546 return reflect->obj_field(_clazz_offset); 3547 } 3548 3549 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 3550 reflect->obj_field_put(_clazz_offset, value); 3551 } 3552 3553 oop java_lang_reflect_Field::name(oop field) { 3554 return field->obj_field(_name_offset); 3555 } 3556 3557 void java_lang_reflect_Field::set_name(oop field, oop value) { 3558 field->obj_field_put(_name_offset, value); 3559 } 3560 3561 oop java_lang_reflect_Field::type(oop field) { 3562 return field->obj_field(_type_offset); 3563 } 3564 3565 void java_lang_reflect_Field::set_type(oop field, oop value) { 3566 field->obj_field_put(_type_offset, value); 3567 } 3568 3569 int java_lang_reflect_Field::slot(oop reflect) { 3570 return reflect->int_field(_slot_offset); 3571 } 3572 3573 void java_lang_reflect_Field::set_slot(oop reflect, int value) { 3574 reflect->int_field_put(_slot_offset, value); 3575 } 3576 3577 int java_lang_reflect_Field::modifiers(oop field) { 3578 return field->int_field(_modifiers_offset); 3579 } 3580 3581 void java_lang_reflect_Field::set_modifiers(oop field, int value) { 3582 field->int_field_put(_modifiers_offset, value); 3583 } 3584 3585 void java_lang_reflect_Field::set_trusted_final(oop field) { 3586 field->bool_field_put(_trusted_final_offset, true); 3587 } 3588 3589 void java_lang_reflect_Field::set_signature(oop field, oop value) { 3590 field->obj_field_put(_signature_offset, value); 3591 } 3592 3593 void java_lang_reflect_Field::set_annotations(oop field, oop value) { 3594 field->obj_field_put(_annotations_offset, value); 3595 } 3596 3597 oop java_lang_reflect_RecordComponent::create(InstanceKlass* holder, RecordComponent* component, TRAPS) { 3598 // Allocate java.lang.reflect.RecordComponent instance 3599 HandleMark hm(THREAD); 3600 InstanceKlass* ik = vmClasses::RecordComponent_klass(); 3601 assert(ik != nullptr, "must be loaded"); 3602 ik->initialize(CHECK_NULL); 3603 3604 Handle element = ik->allocate_instance_handle(CHECK_NULL); 3605 3606 Handle decl_class(THREAD, holder->java_mirror()); 3607 java_lang_reflect_RecordComponent::set_clazz(element(), decl_class()); 3608 3609 Symbol* name = holder->constants()->symbol_at(component->name_index()); // name_index is a utf8 3610 oop component_name = StringTable::intern(name, CHECK_NULL); 3611 java_lang_reflect_RecordComponent::set_name(element(), component_name); 3612 3613 Symbol* type = holder->constants()->symbol_at(component->descriptor_index()); 3614 Handle component_type_h = 3615 SystemDictionary::find_java_mirror_for_type(type, holder, SignatureStream::NCDFError, CHECK_NULL); 3616 java_lang_reflect_RecordComponent::set_type(element(), component_type_h()); 3617 3618 Method* accessor_method = nullptr; 3619 { 3620 // Prepend "()" to type to create the full method signature. 3621 ResourceMark rm(THREAD); 3622 int sig_len = type->utf8_length() + 3; // "()" and null char 3623 char* sig = NEW_RESOURCE_ARRAY(char, sig_len); 3624 jio_snprintf(sig, sig_len, "%c%c%s", JVM_SIGNATURE_FUNC, JVM_SIGNATURE_ENDFUNC, type->as_C_string()); 3625 TempNewSymbol full_sig = SymbolTable::new_symbol(sig); 3626 accessor_method = holder->find_instance_method(name, full_sig, Klass::PrivateLookupMode::find); 3627 } 3628 3629 if (accessor_method != nullptr) { 3630 methodHandle method(THREAD, accessor_method); 3631 oop m = Reflection::new_method(method, false, CHECK_NULL); 3632 java_lang_reflect_RecordComponent::set_accessor(element(), m); 3633 } else { 3634 java_lang_reflect_RecordComponent::set_accessor(element(), nullptr); 3635 } 3636 3637 int sig_index = component->generic_signature_index(); 3638 if (sig_index > 0) { 3639 Symbol* sig = holder->constants()->symbol_at(sig_index); // sig_index is a utf8 3640 oop component_sig = StringTable::intern(sig, CHECK_NULL); 3641 java_lang_reflect_RecordComponent::set_signature(element(), component_sig); 3642 } else { 3643 java_lang_reflect_RecordComponent::set_signature(element(), nullptr); 3644 } 3645 3646 typeArrayOop annotation_oop = Annotations::make_java_array(component->annotations(), CHECK_NULL); 3647 java_lang_reflect_RecordComponent::set_annotations(element(), annotation_oop); 3648 3649 typeArrayOop type_annotation_oop = Annotations::make_java_array(component->type_annotations(), CHECK_NULL); 3650 java_lang_reflect_RecordComponent::set_typeAnnotations(element(), type_annotation_oop); 3651 3652 return element(); 3653 } 3654 3655 int reflect_ConstantPool::_oop_offset; 3656 3657 #define CONSTANTPOOL_FIELDS_DO(macro) \ 3658 macro(_oop_offset, k, "constantPoolOop", object_signature, false) 3659 3660 void reflect_ConstantPool::compute_offsets() { 3661 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass(); 3662 // The field is called ConstantPool* in the sun.reflect.ConstantPool class. 3663 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3664 } 3665 3666 #if INCLUDE_CDS 3667 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) { 3668 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3669 } 3670 #endif 3671 3672 int java_lang_reflect_Parameter::_name_offset; 3673 int java_lang_reflect_Parameter::_modifiers_offset; 3674 int java_lang_reflect_Parameter::_index_offset; 3675 int java_lang_reflect_Parameter::_executable_offset; 3676 3677 #define PARAMETER_FIELDS_DO(macro) \ 3678 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3679 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3680 macro(_index_offset, k, vmSymbols::index_name(), int_signature, false); \ 3681 macro(_executable_offset, k, vmSymbols::executable_name(), executable_signature, false) 3682 3683 void java_lang_reflect_Parameter::compute_offsets() { 3684 InstanceKlass* k = vmClasses::reflect_Parameter_klass(); 3685 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3686 } 3687 3688 #if INCLUDE_CDS 3689 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) { 3690 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3691 } 3692 #endif 3693 3694 Handle java_lang_reflect_Parameter::create(TRAPS) { 3695 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3696 Symbol* name = vmSymbols::java_lang_reflect_Parameter(); 3697 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3698 InstanceKlass* ik = InstanceKlass::cast(k); 3699 // Ensure it is initialized 3700 ik->initialize(CHECK_NH); 3701 return ik->allocate_instance_handle(THREAD); 3702 } 3703 3704 oop java_lang_reflect_Parameter::name(oop param) { 3705 return param->obj_field(_name_offset); 3706 } 3707 3708 void java_lang_reflect_Parameter::set_name(oop param, oop value) { 3709 param->obj_field_put(_name_offset, value); 3710 } 3711 3712 int java_lang_reflect_Parameter::modifiers(oop param) { 3713 return param->int_field(_modifiers_offset); 3714 } 3715 3716 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) { 3717 param->int_field_put(_modifiers_offset, value); 3718 } 3719 3720 int java_lang_reflect_Parameter::index(oop param) { 3721 return param->int_field(_index_offset); 3722 } 3723 3724 void java_lang_reflect_Parameter::set_index(oop param, int value) { 3725 param->int_field_put(_index_offset, value); 3726 } 3727 3728 oop java_lang_reflect_Parameter::executable(oop param) { 3729 return param->obj_field(_executable_offset); 3730 } 3731 3732 void java_lang_reflect_Parameter::set_executable(oop param, oop value) { 3733 param->obj_field_put(_executable_offset, value); 3734 } 3735 3736 // java_lang_Module 3737 3738 int java_lang_Module::_loader_offset; 3739 int java_lang_Module::_name_offset; 3740 int java_lang_Module::_module_entry_offset; 3741 3742 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) { 3743 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3744 return JavaCalls::construct_new_instance(vmClasses::Module_klass(), 3745 vmSymbols::java_lang_module_init_signature(), 3746 loader, module_name, CHECK_NH); 3747 } 3748 3749 #define MODULE_FIELDS_DO(macro) \ 3750 macro(_loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \ 3751 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false) 3752 3753 void java_lang_Module::compute_offsets() { 3754 InstanceKlass* k = vmClasses::Module_klass(); 3755 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3756 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3757 } 3758 3759 #if INCLUDE_CDS 3760 void java_lang_Module::serialize_offsets(SerializeClosure* f) { 3761 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3762 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3763 } 3764 #endif 3765 3766 oop java_lang_Module::loader(oop module) { 3767 return module->obj_field(_loader_offset); 3768 } 3769 3770 void java_lang_Module::set_loader(oop module, oop value) { 3771 module->obj_field_put(_loader_offset, value); 3772 } 3773 3774 oop java_lang_Module::name(oop module) { 3775 return module->obj_field(_name_offset); 3776 } 3777 3778 void java_lang_Module::set_name(oop module, oop value) { 3779 module->obj_field_put(_name_offset, value); 3780 } 3781 3782 ModuleEntry* java_lang_Module::module_entry_raw(oop module) { 3783 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset"); 3784 assert(module != nullptr, "module can't be null"); 3785 assert(oopDesc::is_oop(module), "module must be oop"); 3786 3787 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset); 3788 return module_entry; 3789 } 3790 3791 ModuleEntry* java_lang_Module::module_entry(oop module) { 3792 ModuleEntry* module_entry = module_entry_raw(module); 3793 if (module_entry == nullptr) { 3794 // If the inject field containing the ModuleEntry* is null then return the 3795 // class loader's unnamed module. 3796 oop loader = java_lang_Module::loader(module); 3797 Handle h_loader = Handle(Thread::current(), loader); 3798 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader); 3799 return loader_cld->unnamed_module(); 3800 } 3801 return module_entry; 3802 } 3803 3804 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) { 3805 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset"); 3806 assert(module != nullptr, "module can't be null"); 3807 assert(oopDesc::is_oop(module), "module must be oop"); 3808 module->address_field_put(_module_entry_offset, (address)module_entry); 3809 } 3810 3811 Handle reflect_ConstantPool::create(TRAPS) { 3812 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3813 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass(); 3814 // Ensure it is initialized 3815 k->initialize(CHECK_NH); 3816 return k->allocate_instance_handle(THREAD); 3817 } 3818 3819 3820 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) { 3821 oop mirror = value->pool_holder()->java_mirror(); 3822 // Save the mirror to get back the constant pool. 3823 reflect->obj_field_put(_oop_offset, mirror); 3824 } 3825 3826 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) { 3827 3828 oop mirror = reflect->obj_field(_oop_offset); 3829 Klass* k = java_lang_Class::as_Klass(mirror); 3830 assert(k->is_instance_klass(), "Must be"); 3831 3832 // Get the constant pool back from the klass. Since class redefinition 3833 // merges the new constant pool into the old, this is essentially the 3834 // same constant pool as the original. If constant pool merging is 3835 // no longer done in the future, this will have to change to save 3836 // the original. 3837 return InstanceKlass::cast(k)->constants(); 3838 } 3839 3840 3841 // Support for java_lang_ref_Reference 3842 3843 bool java_lang_ref_Reference::_offsets_initialized; 3844 3845 int java_lang_ref_Reference::_referent_offset; 3846 int java_lang_ref_Reference::_queue_offset; 3847 int java_lang_ref_Reference::_next_offset; 3848 int java_lang_ref_Reference::_discovered_offset; 3849 3850 #define REFERENCE_FIELDS_DO(macro) \ 3851 macro(_referent_offset, k, "referent", object_signature, false); \ 3852 macro(_queue_offset, k, "queue", referencequeue_signature, false); \ 3853 macro(_next_offset, k, "next", reference_signature, false); \ 3854 macro(_discovered_offset, k, "discovered", reference_signature, false); 3855 3856 void java_lang_ref_Reference::compute_offsets() { 3857 if (_offsets_initialized) { 3858 return; 3859 } 3860 _offsets_initialized = true; 3861 InstanceKlass* k = vmClasses::Reference_klass(); 3862 REFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3863 } 3864 3865 #if INCLUDE_CDS 3866 void java_lang_ref_Reference::serialize_offsets(SerializeClosure* f) { 3867 f->do_bool(&_offsets_initialized); 3868 REFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3869 } 3870 #endif 3871 3872 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) { 3873 assert(obj != nullptr, "sanity"); 3874 if (offset != _referent_offset) { 3875 return false; 3876 } 3877 3878 Klass* k = obj->klass(); 3879 if (!k->is_instance_klass()) { 3880 return false; 3881 } 3882 3883 InstanceKlass* ik = InstanceKlass::cast(obj->klass()); 3884 bool is_reference = ik->reference_type() != REF_NONE; 3885 assert(!is_reference || ik->is_subclass_of(vmClasses::Reference_klass()), "sanity"); 3886 return is_reference; 3887 } 3888 3889 int java_lang_boxing_object::_value_offset; 3890 int java_lang_boxing_object::_long_value_offset; 3891 3892 #define BOXING_FIELDS_DO(macro) \ 3893 macro(_value_offset, integerKlass, "value", int_signature, false); \ 3894 macro(_long_value_offset, longKlass, "value", long_signature, false); 3895 3896 void java_lang_boxing_object::compute_offsets() { 3897 InstanceKlass* integerKlass = vmClasses::Integer_klass(); 3898 InstanceKlass* longKlass = vmClasses::Long_klass(); 3899 BOXING_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3900 } 3901 3902 #if INCLUDE_CDS 3903 void java_lang_boxing_object::serialize_offsets(SerializeClosure* f) { 3904 BOXING_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3905 } 3906 #endif 3907 3908 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 3909 Klass* k = vmClasses::box_klass(type); 3910 if (k == nullptr) return nullptr; 3911 InstanceKlass* ik = InstanceKlass::cast(k); 3912 if (!ik->is_initialized()) { 3913 ik->initialize(CHECK_NULL); 3914 } 3915 return ik->allocate_instance(THREAD); 3916 } 3917 3918 3919 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 3920 oop box = initialize_and_allocate(type, CHECK_NULL); 3921 if (box == nullptr) return nullptr; 3922 switch (type) { 3923 case T_BOOLEAN: 3924 box->bool_field_put(_value_offset, value->z); 3925 break; 3926 case T_CHAR: 3927 box->char_field_put(_value_offset, value->c); 3928 break; 3929 case T_FLOAT: 3930 box->float_field_put(_value_offset, value->f); 3931 break; 3932 case T_DOUBLE: 3933 box->double_field_put(_long_value_offset, value->d); 3934 break; 3935 case T_BYTE: 3936 box->byte_field_put(_value_offset, value->b); 3937 break; 3938 case T_SHORT: 3939 box->short_field_put(_value_offset, value->s); 3940 break; 3941 case T_INT: 3942 box->int_field_put(_value_offset, value->i); 3943 break; 3944 case T_LONG: 3945 box->long_field_put(_long_value_offset, value->j); 3946 break; 3947 default: 3948 return nullptr; 3949 } 3950 return box; 3951 } 3952 3953 3954 BasicType java_lang_boxing_object::basic_type(oop box) { 3955 if (box == nullptr) return T_ILLEGAL; 3956 BasicType type = vmClasses::box_klass_type(box->klass()); 3957 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 3958 return T_ILLEGAL; 3959 return type; 3960 } 3961 3962 3963 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 3964 BasicType type = vmClasses::box_klass_type(box->klass()); 3965 switch (type) { 3966 case T_BOOLEAN: 3967 value->z = box->bool_field(_value_offset); 3968 break; 3969 case T_CHAR: 3970 value->c = box->char_field(_value_offset); 3971 break; 3972 case T_FLOAT: 3973 value->f = box->float_field(_value_offset); 3974 break; 3975 case T_DOUBLE: 3976 value->d = box->double_field(_long_value_offset); 3977 break; 3978 case T_BYTE: 3979 value->b = box->byte_field(_value_offset); 3980 break; 3981 case T_SHORT: 3982 value->s = box->short_field(_value_offset); 3983 break; 3984 case T_INT: 3985 value->i = box->int_field(_value_offset); 3986 break; 3987 case T_LONG: 3988 value->j = box->long_field(_long_value_offset); 3989 break; 3990 default: 3991 return T_ILLEGAL; 3992 } // end switch 3993 return type; 3994 } 3995 3996 3997 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 3998 BasicType type = vmClasses::box_klass_type(box->klass()); 3999 switch (type) { 4000 case T_BOOLEAN: 4001 box->bool_field_put(_value_offset, value->z); 4002 break; 4003 case T_CHAR: 4004 box->char_field_put(_value_offset, value->c); 4005 break; 4006 case T_FLOAT: 4007 box->float_field_put(_value_offset, value->f); 4008 break; 4009 case T_DOUBLE: 4010 box->double_field_put(_long_value_offset, value->d); 4011 break; 4012 case T_BYTE: 4013 box->byte_field_put(_value_offset, value->b); 4014 break; 4015 case T_SHORT: 4016 box->short_field_put(_value_offset, value->s); 4017 break; 4018 case T_INT: 4019 box->int_field_put(_value_offset, value->i); 4020 break; 4021 case T_LONG: 4022 box->long_field_put(_long_value_offset, value->j); 4023 break; 4024 default: 4025 return T_ILLEGAL; 4026 } // end switch 4027 return type; 4028 } 4029 4030 4031 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) { 4032 switch (type) { 4033 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break; 4034 case T_CHAR: st->print("%d", value->c); break; 4035 case T_BYTE: st->print("%d", value->b); break; 4036 case T_SHORT: st->print("%d", value->s); break; 4037 case T_INT: st->print("%d", value->i); break; 4038 case T_LONG: st->print(JLONG_FORMAT, value->j); break; 4039 case T_FLOAT: st->print("%f", value->f); break; 4040 case T_DOUBLE: st->print("%lf", value->d); break; 4041 default: st->print("type %d?", type); break; 4042 } 4043 } 4044 4045 4046 // Support for java_lang_ref_SoftReference 4047 // 4048 4049 int java_lang_ref_SoftReference::_timestamp_offset; 4050 int java_lang_ref_SoftReference::_static_clock_offset; 4051 4052 #define SOFTREFERENCE_FIELDS_DO(macro) \ 4053 macro(_timestamp_offset, k, "timestamp", long_signature, false); \ 4054 macro(_static_clock_offset, k, "clock", long_signature, true) 4055 4056 void java_lang_ref_SoftReference::compute_offsets() { 4057 InstanceKlass* k = vmClasses::SoftReference_klass(); 4058 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4059 } 4060 4061 #if INCLUDE_CDS 4062 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) { 4063 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4064 } 4065 #endif 4066 4067 jlong java_lang_ref_SoftReference::timestamp(oop ref) { 4068 return ref->long_field(_timestamp_offset); 4069 } 4070 4071 jlong java_lang_ref_SoftReference::clock() { 4072 InstanceKlass* ik = vmClasses::SoftReference_klass(); 4073 oop base = ik->static_field_base_raw(); 4074 return base->long_field(_static_clock_offset); 4075 } 4076 4077 void java_lang_ref_SoftReference::set_clock(jlong value) { 4078 InstanceKlass* ik = vmClasses::SoftReference_klass(); 4079 oop base = ik->static_field_base_raw(); 4080 base->long_field_put(_static_clock_offset, value); 4081 } 4082 4083 // Support for java_lang_invoke_DirectMethodHandle 4084 4085 int java_lang_invoke_DirectMethodHandle::_member_offset; 4086 4087 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) { 4088 oop member_name = nullptr; 4089 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh), 4090 "a DirectMethodHandle oop is expected"); 4091 return dmh->obj_field(_member_offset); 4092 } 4093 4094 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \ 4095 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false) 4096 4097 void java_lang_invoke_DirectMethodHandle::compute_offsets() { 4098 InstanceKlass* k = vmClasses::DirectMethodHandle_klass(); 4099 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4100 } 4101 4102 #if INCLUDE_CDS 4103 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) { 4104 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4105 } 4106 #endif 4107 4108 // Support for java_lang_invoke_MethodHandle 4109 4110 int java_lang_invoke_MethodHandle::_type_offset; 4111 int java_lang_invoke_MethodHandle::_form_offset; 4112 4113 int java_lang_invoke_MemberName::_clazz_offset; 4114 int java_lang_invoke_MemberName::_name_offset; 4115 int java_lang_invoke_MemberName::_type_offset; 4116 int java_lang_invoke_MemberName::_flags_offset; 4117 int java_lang_invoke_MemberName::_method_offset; 4118 int java_lang_invoke_MemberName::_vmindex_offset; 4119 4120 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset; 4121 int java_lang_invoke_ResolvedMethodName::_vmholder_offset; 4122 4123 int java_lang_invoke_LambdaForm::_vmentry_offset; 4124 4125 #define METHODHANDLE_FIELDS_DO(macro) \ 4126 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \ 4127 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false) 4128 4129 void java_lang_invoke_MethodHandle::compute_offsets() { 4130 InstanceKlass* k = vmClasses::MethodHandle_klass(); 4131 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4132 } 4133 4134 #if INCLUDE_CDS 4135 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) { 4136 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4137 } 4138 #endif 4139 4140 #define MEMBERNAME_FIELDS_DO(macro) \ 4141 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 4142 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 4143 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \ 4144 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \ 4145 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false) 4146 4147 void java_lang_invoke_MemberName::compute_offsets() { 4148 InstanceKlass* k = vmClasses::MemberName_klass(); 4149 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4150 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4151 } 4152 4153 #if INCLUDE_CDS 4154 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) { 4155 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4156 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4157 } 4158 #endif 4159 4160 #define RESOLVEDMETHOD_FIELDS_DO(macro) \ 4161 macro(_vmholder_offset, k, "vmholder", class_signature, false) 4162 4163 void java_lang_invoke_ResolvedMethodName::compute_offsets() { 4164 InstanceKlass* k = vmClasses::ResolvedMethodName_klass(); 4165 assert(k != nullptr, "jdk mismatch"); 4166 RESOLVEDMETHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4167 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4168 } 4169 4170 #if INCLUDE_CDS 4171 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) { 4172 RESOLVEDMETHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4173 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4174 } 4175 #endif 4176 4177 #define LAMBDAFORM_FIELDS_DO(macro) \ 4178 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false) 4179 4180 void java_lang_invoke_LambdaForm::compute_offsets() { 4181 InstanceKlass* k = vmClasses::LambdaForm_klass(); 4182 assert (k != nullptr, "jdk mismatch"); 4183 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4184 } 4185 4186 #if INCLUDE_CDS 4187 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) { 4188 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4189 } 4190 #endif 4191 4192 bool java_lang_invoke_LambdaForm::is_instance(oop obj) { 4193 return obj != nullptr && is_subclass(obj->klass()); 4194 } 4195 4196 int jdk_internal_foreign_abi_NativeEntryPoint::_method_type_offset; 4197 int jdk_internal_foreign_abi_NativeEntryPoint::_downcall_stub_address_offset; 4198 4199 #define NEP_FIELDS_DO(macro) \ 4200 macro(_method_type_offset, k, "methodType", java_lang_invoke_MethodType_signature, false); \ 4201 macro(_downcall_stub_address_offset, k, "downcallStubAddress", long_signature, false); 4202 4203 bool jdk_internal_foreign_abi_NativeEntryPoint::is_instance(oop obj) { 4204 return obj != nullptr && is_subclass(obj->klass()); 4205 } 4206 4207 void jdk_internal_foreign_abi_NativeEntryPoint::compute_offsets() { 4208 InstanceKlass* k = vmClasses::NativeEntryPoint_klass(); 4209 NEP_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4210 } 4211 4212 #if INCLUDE_CDS 4213 void jdk_internal_foreign_abi_NativeEntryPoint::serialize_offsets(SerializeClosure* f) { 4214 NEP_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4215 } 4216 #endif 4217 4218 oop jdk_internal_foreign_abi_NativeEntryPoint::method_type(oop entry) { 4219 return entry->obj_field(_method_type_offset); 4220 } 4221 4222 jlong jdk_internal_foreign_abi_NativeEntryPoint::downcall_stub_address(oop entry) { 4223 return entry->long_field(_downcall_stub_address_offset); 4224 } 4225 4226 int jdk_internal_foreign_abi_ABIDescriptor::_inputStorage_offset; 4227 int jdk_internal_foreign_abi_ABIDescriptor::_outputStorage_offset; 4228 int jdk_internal_foreign_abi_ABIDescriptor::_volatileStorage_offset; 4229 int jdk_internal_foreign_abi_ABIDescriptor::_stackAlignment_offset; 4230 int jdk_internal_foreign_abi_ABIDescriptor::_shadowSpace_offset; 4231 int jdk_internal_foreign_abi_ABIDescriptor::_scratch1_offset; 4232 int jdk_internal_foreign_abi_ABIDescriptor::_scratch2_offset; 4233 4234 #define ABIDescriptor_FIELDS_DO(macro) \ 4235 macro(_inputStorage_offset, k, "inputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \ 4236 macro(_outputStorage_offset, k, "outputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \ 4237 macro(_volatileStorage_offset, k, "volatileStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \ 4238 macro(_stackAlignment_offset, k, "stackAlignment", int_signature, false); \ 4239 macro(_shadowSpace_offset, k, "shadowSpace", int_signature, false); \ 4240 macro(_scratch1_offset, k, "scratch1", jdk_internal_foreign_abi_VMStorage_signature, false); \ 4241 macro(_scratch2_offset, k, "scratch2", jdk_internal_foreign_abi_VMStorage_signature, false); 4242 4243 bool jdk_internal_foreign_abi_ABIDescriptor::is_instance(oop obj) { 4244 return obj != nullptr && is_subclass(obj->klass()); 4245 } 4246 4247 void jdk_internal_foreign_abi_ABIDescriptor::compute_offsets() { 4248 InstanceKlass* k = vmClasses::ABIDescriptor_klass(); 4249 ABIDescriptor_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4250 } 4251 4252 #if INCLUDE_CDS 4253 void jdk_internal_foreign_abi_ABIDescriptor::serialize_offsets(SerializeClosure* f) { 4254 ABIDescriptor_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4255 } 4256 #endif 4257 4258 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::inputStorage(oop entry) { 4259 return oop_cast<objArrayOop>(entry->obj_field(_inputStorage_offset)); 4260 } 4261 4262 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::outputStorage(oop entry) { 4263 return oop_cast<objArrayOop>(entry->obj_field(_outputStorage_offset)); 4264 } 4265 4266 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::volatileStorage(oop entry) { 4267 return oop_cast<objArrayOop>(entry->obj_field(_volatileStorage_offset)); 4268 } 4269 4270 jint jdk_internal_foreign_abi_ABIDescriptor::stackAlignment(oop entry) { 4271 return entry->int_field(_stackAlignment_offset); 4272 } 4273 4274 jint jdk_internal_foreign_abi_ABIDescriptor::shadowSpace(oop entry) { 4275 return entry->int_field(_shadowSpace_offset); 4276 } 4277 4278 oop jdk_internal_foreign_abi_ABIDescriptor::scratch1(oop entry) { 4279 return entry->obj_field(_scratch1_offset); 4280 } 4281 4282 oop jdk_internal_foreign_abi_ABIDescriptor::scratch2(oop entry) { 4283 return entry->obj_field(_scratch2_offset); 4284 } 4285 4286 int jdk_internal_foreign_abi_VMStorage::_type_offset; 4287 int jdk_internal_foreign_abi_VMStorage::_indexOrOffset_offset; 4288 int jdk_internal_foreign_abi_VMStorage::_segmentMaskOrSize_offset; 4289 int jdk_internal_foreign_abi_VMStorage::_debugName_offset; 4290 4291 #define VMStorage_FIELDS_DO(macro) \ 4292 macro(_type_offset, k, "type", byte_signature, false); \ 4293 macro(_indexOrOffset_offset, k, "indexOrOffset", int_signature, false); \ 4294 macro(_segmentMaskOrSize_offset, k, "segmentMaskOrSize", short_signature, false); \ 4295 macro(_debugName_offset, k, "debugName", string_signature, false); \ 4296 4297 bool jdk_internal_foreign_abi_VMStorage::is_instance(oop obj) { 4298 return obj != nullptr && is_subclass(obj->klass()); 4299 } 4300 4301 void jdk_internal_foreign_abi_VMStorage::compute_offsets() { 4302 InstanceKlass* k = vmClasses::VMStorage_klass(); 4303 VMStorage_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4304 } 4305 4306 #if INCLUDE_CDS 4307 void jdk_internal_foreign_abi_VMStorage::serialize_offsets(SerializeClosure* f) { 4308 VMStorage_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4309 } 4310 #endif 4311 4312 jbyte jdk_internal_foreign_abi_VMStorage::type(oop entry) { 4313 return entry->byte_field(_type_offset); 4314 } 4315 4316 jint jdk_internal_foreign_abi_VMStorage::index_or_offset(oop entry) { 4317 return entry->int_field(_indexOrOffset_offset); 4318 } 4319 4320 jshort jdk_internal_foreign_abi_VMStorage::segment_mask_or_size(oop entry) { 4321 return entry->short_field(_segmentMaskOrSize_offset); 4322 } 4323 4324 oop jdk_internal_foreign_abi_VMStorage::debugName(oop entry) { 4325 return entry->obj_field(_debugName_offset); 4326 } 4327 4328 int jdk_internal_foreign_abi_CallConv::_argRegs_offset; 4329 int jdk_internal_foreign_abi_CallConv::_retRegs_offset; 4330 4331 #define CallConv_FIELDS_DO(macro) \ 4332 macro(_argRegs_offset, k, "argRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \ 4333 macro(_retRegs_offset, k, "retRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \ 4334 4335 bool jdk_internal_foreign_abi_CallConv::is_instance(oop obj) { 4336 return obj != nullptr && is_subclass(obj->klass()); 4337 } 4338 4339 void jdk_internal_foreign_abi_CallConv::compute_offsets() { 4340 InstanceKlass* k = vmClasses::CallConv_klass(); 4341 CallConv_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4342 } 4343 4344 #if INCLUDE_CDS 4345 void jdk_internal_foreign_abi_CallConv::serialize_offsets(SerializeClosure* f) { 4346 CallConv_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4347 } 4348 #endif 4349 4350 objArrayOop jdk_internal_foreign_abi_CallConv::argRegs(oop entry) { 4351 return oop_cast<objArrayOop>(entry->obj_field(_argRegs_offset)); 4352 } 4353 4354 objArrayOop jdk_internal_foreign_abi_CallConv::retRegs(oop entry) { 4355 return oop_cast<objArrayOop>(entry->obj_field(_retRegs_offset)); 4356 } 4357 4358 oop java_lang_invoke_MethodHandle::type(oop mh) { 4359 return mh->obj_field(_type_offset); 4360 } 4361 4362 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) { 4363 mh->obj_field_put(_type_offset, mtype); 4364 } 4365 4366 oop java_lang_invoke_MethodHandle::form(oop mh) { 4367 assert(_form_offset != 0, ""); 4368 return mh->obj_field(_form_offset); 4369 } 4370 4371 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) { 4372 assert(_form_offset != 0, ""); 4373 mh->obj_field_put(_form_offset, lform); 4374 } 4375 4376 /// MemberName accessors 4377 4378 oop java_lang_invoke_MemberName::clazz(oop mname) { 4379 assert(is_instance(mname), "wrong type"); 4380 return mname->obj_field(_clazz_offset); 4381 } 4382 4383 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) { 4384 assert(is_instance(mname), "wrong type"); 4385 mname->obj_field_put(_clazz_offset, clazz); 4386 } 4387 4388 oop java_lang_invoke_MemberName::name(oop mname) { 4389 assert(is_instance(mname), "wrong type"); 4390 return mname->obj_field(_name_offset); 4391 } 4392 4393 void java_lang_invoke_MemberName::set_name(oop mname, oop name) { 4394 assert(is_instance(mname), "wrong type"); 4395 mname->obj_field_put(_name_offset, name); 4396 } 4397 4398 oop java_lang_invoke_MemberName::type(oop mname) { 4399 assert(is_instance(mname), "wrong type"); 4400 return mname->obj_field(_type_offset); 4401 } 4402 4403 void java_lang_invoke_MemberName::set_type(oop mname, oop type) { 4404 assert(is_instance(mname), "wrong type"); 4405 mname->obj_field_put(_type_offset, type); 4406 } 4407 4408 int java_lang_invoke_MemberName::flags(oop mname) { 4409 assert(is_instance(mname), "wrong type"); 4410 return mname->int_field(_flags_offset); 4411 } 4412 4413 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) { 4414 assert(is_instance(mname), "wrong type"); 4415 mname->int_field_put(_flags_offset, flags); 4416 } 4417 4418 4419 // Return vmtarget from ResolvedMethodName method field through indirection 4420 Method* java_lang_invoke_MemberName::vmtarget(oop mname) { 4421 assert(is_instance(mname), "wrong type"); 4422 oop method = mname->obj_field(_method_offset); 4423 return method == nullptr ? nullptr : java_lang_invoke_ResolvedMethodName::vmtarget(method); 4424 } 4425 4426 bool java_lang_invoke_MemberName::is_method(oop mname) { 4427 assert(is_instance(mname), "must be MemberName"); 4428 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0; 4429 } 4430 4431 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) { 4432 assert(is_instance(mname), "wrong type"); 4433 mname->obj_field_put(_method_offset, resolved_method); 4434 } 4435 4436 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) { 4437 assert(is_instance(mname), "wrong type"); 4438 return (intptr_t) mname->address_field(_vmindex_offset); 4439 } 4440 4441 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) { 4442 assert(is_instance(mname), "wrong type"); 4443 mname->address_field_put(_vmindex_offset, (address) index); 4444 } 4445 4446 4447 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) { 4448 assert(is_instance(resolved_method), "wrong type"); 4449 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset); 4450 assert(m->is_method(), "must be"); 4451 return m; 4452 } 4453 4454 // Used by redefinition to change Method* to new Method* with same hash (name, signature) 4455 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) { 4456 assert(is_instance(resolved_method), "wrong type"); 4457 resolved_method->address_field_put(_vmtarget_offset, (address)m); 4458 } 4459 4460 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) { 4461 assert(is_instance(resolved_method), "wrong type"); 4462 resolved_method->obj_field_put(_vmholder_offset, holder); 4463 } 4464 4465 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) { 4466 const Method* method = m(); 4467 4468 // lookup ResolvedMethod oop in the table, or create a new one and intern it 4469 oop resolved_method = ResolvedMethodTable::find_method(method); 4470 if (resolved_method != nullptr) { 4471 return resolved_method; 4472 } 4473 4474 InstanceKlass* k = vmClasses::ResolvedMethodName_klass(); 4475 if (!k->is_initialized()) { 4476 k->initialize(CHECK_NULL); 4477 } 4478 4479 oop new_resolved_method = k->allocate_instance(CHECK_NULL); 4480 4481 NoSafepointVerifier nsv; 4482 4483 if (method->is_old()) { 4484 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() : 4485 method->get_new_method(); 4486 } 4487 4488 InstanceKlass* holder = method->method_holder(); 4489 4490 set_vmtarget(new_resolved_method, const_cast<Method*>(method)); 4491 // Add a reference to the loader (actually mirror because hidden classes may not have 4492 // distinct loaders) to ensure the metadata is kept alive. 4493 // This mirror may be different than the one in clazz field. 4494 set_vmholder(new_resolved_method, holder->java_mirror()); 4495 4496 // Set flag in class to indicate this InstanceKlass has entries in the table 4497 // to avoid walking table during redefinition if none of the redefined classes 4498 // have any membernames in the table. 4499 holder->set_has_resolved_methods(); 4500 4501 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method)); 4502 } 4503 4504 oop java_lang_invoke_LambdaForm::vmentry(oop lform) { 4505 assert(is_instance(lform), "wrong type"); 4506 return lform->obj_field(_vmentry_offset); 4507 } 4508 4509 4510 // Support for java_lang_invoke_MethodType 4511 4512 int java_lang_invoke_MethodType::_rtype_offset; 4513 int java_lang_invoke_MethodType::_ptypes_offset; 4514 4515 #define METHODTYPE_FIELDS_DO(macro) \ 4516 macro(_rtype_offset, k, "rtype", class_signature, false); \ 4517 macro(_ptypes_offset, k, "ptypes", class_array_signature, false) 4518 4519 void java_lang_invoke_MethodType::compute_offsets() { 4520 InstanceKlass* k = vmClasses::MethodType_klass(); 4521 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4522 } 4523 4524 #if INCLUDE_CDS 4525 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) { 4526 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4527 } 4528 #endif 4529 4530 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) { 4531 st->print("("); 4532 objArrayOop pts = ptypes(mt); 4533 if (pts != nullptr) { 4534 for (int i = 0, limit = pts->length(); i < limit; i++) { 4535 java_lang_Class::print_signature(pts->obj_at(i), st); 4536 } 4537 } else { 4538 st->print("null"); 4539 } 4540 st->print(")"); 4541 oop rt = rtype(mt); 4542 if (rt != nullptr) { 4543 java_lang_Class::print_signature(rt, st); 4544 } else { 4545 st->print("null"); 4546 } 4547 } 4548 4549 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) { 4550 ResourceMark rm; 4551 stringStream buffer(128); 4552 print_signature(mt, &buffer); 4553 const char* sigstr = buffer.base(); 4554 int siglen = (int) buffer.size(); 4555 Symbol *name; 4556 if (!intern_if_not_found) { 4557 name = SymbolTable::probe(sigstr, siglen); 4558 } else { 4559 name = SymbolTable::new_symbol(sigstr, siglen); 4560 } 4561 return name; 4562 } 4563 4564 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) { 4565 if (mt1 == mt2) 4566 return true; 4567 if (rtype(mt1) != rtype(mt2)) 4568 return false; 4569 if (ptype_count(mt1) != ptype_count(mt2)) 4570 return false; 4571 for (int i = ptype_count(mt1) - 1; i >= 0; i--) { 4572 if (ptype(mt1, i) != ptype(mt2, i)) 4573 return false; 4574 } 4575 return true; 4576 } 4577 4578 oop java_lang_invoke_MethodType::rtype(oop mt) { 4579 assert(is_instance(mt), "must be a MethodType"); 4580 return mt->obj_field(_rtype_offset); 4581 } 4582 4583 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) { 4584 assert(is_instance(mt), "must be a MethodType"); 4585 return (objArrayOop) mt->obj_field(_ptypes_offset); 4586 } 4587 4588 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) { 4589 return ptypes(mt)->obj_at(idx); 4590 } 4591 4592 int java_lang_invoke_MethodType::ptype_count(oop mt) { 4593 return ptypes(mt)->length(); 4594 } 4595 4596 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) { 4597 objArrayOop pts = ptypes(mt); 4598 int count = pts->length(); 4599 int slots = 0; 4600 for (int i = 0; i < count; i++) { 4601 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i)); 4602 slots += type2size[bt]; 4603 } 4604 return slots; 4605 } 4606 4607 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) { 4608 BasicType bt = java_lang_Class::as_BasicType(rtype(mt)); 4609 return type2size[bt]; 4610 } 4611 4612 4613 // Support for java_lang_invoke_CallSite 4614 4615 int java_lang_invoke_CallSite::_target_offset; 4616 int java_lang_invoke_CallSite::_context_offset; 4617 4618 #define CALLSITE_FIELDS_DO(macro) \ 4619 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \ 4620 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false) 4621 4622 void java_lang_invoke_CallSite::compute_offsets() { 4623 InstanceKlass* k = vmClasses::CallSite_klass(); 4624 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4625 } 4626 4627 #if INCLUDE_CDS 4628 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) { 4629 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4630 } 4631 #endif 4632 4633 oop java_lang_invoke_CallSite::context_no_keepalive(oop call_site) { 4634 assert(java_lang_invoke_CallSite::is_instance(call_site), ""); 4635 4636 oop dep_oop = call_site->obj_field_access<AS_NO_KEEPALIVE>(_context_offset); 4637 return dep_oop; 4638 } 4639 4640 // Support for java_lang_invoke_ConstantCallSite 4641 4642 int java_lang_invoke_ConstantCallSite::_is_frozen_offset; 4643 4644 #define CONSTANTCALLSITE_FIELDS_DO(macro) \ 4645 macro(_is_frozen_offset, k, "isFrozen", bool_signature, false) 4646 4647 void java_lang_invoke_ConstantCallSite::compute_offsets() { 4648 InstanceKlass* k = vmClasses::ConstantCallSite_klass(); 4649 CONSTANTCALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4650 } 4651 4652 #if INCLUDE_CDS 4653 void java_lang_invoke_ConstantCallSite::serialize_offsets(SerializeClosure* f) { 4654 CONSTANTCALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4655 } 4656 #endif 4657 4658 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext 4659 4660 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset; 4661 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_last_cleanup_offset; 4662 4663 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() { 4664 InstanceKlass* k = vmClasses::Context_klass(); 4665 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4666 } 4667 4668 #if INCLUDE_CDS 4669 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) { 4670 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4671 } 4672 #endif 4673 4674 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) { 4675 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), ""); 4676 nmethodBucket* volatile* vmdeps_addr = call_site->field_addr<nmethodBucket* volatile>(_vmdependencies_offset); 4677 volatile uint64_t* last_cleanup_addr = call_site->field_addr<volatile uint64_t>(_last_cleanup_offset); 4678 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr); 4679 return dep_ctx; 4680 } 4681 4682 // Support for java_security_AccessControlContext 4683 4684 int java_security_AccessControlContext::_context_offset; 4685 int java_security_AccessControlContext::_privilegedContext_offset; 4686 int java_security_AccessControlContext::_isPrivileged_offset; 4687 int java_security_AccessControlContext::_isAuthorized_offset; 4688 4689 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \ 4690 macro(_context_offset, k, "context", protectiondomain_signature, false); \ 4691 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \ 4692 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \ 4693 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false) 4694 4695 void java_security_AccessControlContext::compute_offsets() { 4696 assert(_isPrivileged_offset == 0, "offsets should be initialized only once"); 4697 InstanceKlass* k = vmClasses::AccessControlContext_klass(); 4698 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4699 } 4700 4701 #if INCLUDE_CDS 4702 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) { 4703 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4704 } 4705 #endif 4706 4707 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) { 4708 assert(_isPrivileged_offset != 0, "offsets should have been initialized"); 4709 assert(_isAuthorized_offset != 0, "offsets should have been initialized"); 4710 // Ensure klass is initialized 4711 vmClasses::AccessControlContext_klass()->initialize(CHECK_NULL); 4712 // Allocate result 4713 oop result = vmClasses::AccessControlContext_klass()->allocate_instance(CHECK_NULL); 4714 // Fill in values 4715 result->obj_field_put(_context_offset, context()); 4716 result->obj_field_put(_privilegedContext_offset, privileged_context()); 4717 result->bool_field_put(_isPrivileged_offset, isPrivileged); 4718 result->bool_field_put(_isAuthorized_offset, true); 4719 return result; 4720 } 4721 4722 4723 // Support for java_lang_ClassLoader 4724 4725 int java_lang_ClassLoader::_loader_data_offset; 4726 int java_lang_ClassLoader::_parallelCapable_offset; 4727 int java_lang_ClassLoader::_name_offset; 4728 int java_lang_ClassLoader::_nameAndId_offset; 4729 int java_lang_ClassLoader::_unnamedModule_offset; 4730 int java_lang_ClassLoader::_parent_offset; 4731 4732 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) { 4733 assert(loader != nullptr, "loader must not be null"); 4734 assert(oopDesc::is_oop(loader), "loader must be oop"); 4735 return Atomic::load_acquire(loader->field_addr<ClassLoaderData*>(_loader_data_offset)); 4736 } 4737 4738 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) { 4739 assert(loader != nullptr, "loader must not be null"); 4740 assert(oopDesc::is_oop(loader), "loader must be oop"); 4741 return *loader->field_addr<ClassLoaderData*>(_loader_data_offset); 4742 } 4743 4744 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) { 4745 assert(loader != nullptr, "loader must not be null"); 4746 assert(oopDesc::is_oop(loader), "loader must be oop"); 4747 Atomic::release_store(loader->field_addr<ClassLoaderData*>(_loader_data_offset), new_data); 4748 } 4749 4750 #define CLASSLOADER_FIELDS_DO(macro) \ 4751 macro(_parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \ 4752 macro(_name_offset, k1, vmSymbols::name_name(), string_signature, false); \ 4753 macro(_nameAndId_offset, k1, "nameAndId", string_signature, false); \ 4754 macro(_unnamedModule_offset, k1, "unnamedModule", module_signature, false); \ 4755 macro(_parent_offset, k1, "parent", classloader_signature, false) 4756 4757 void java_lang_ClassLoader::compute_offsets() { 4758 InstanceKlass* k1 = vmClasses::ClassLoader_klass(); 4759 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4760 4761 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4762 } 4763 4764 #if INCLUDE_CDS 4765 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) { 4766 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4767 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4768 } 4769 #endif 4770 4771 oop java_lang_ClassLoader::parent(oop loader) { 4772 assert(is_instance(loader), "loader must be oop"); 4773 return loader->obj_field(_parent_offset); 4774 } 4775 4776 oop java_lang_ClassLoader::parent_no_keepalive(oop loader) { 4777 assert(is_instance(loader), "loader must be oop"); 4778 return loader->obj_field_access<AS_NO_KEEPALIVE>(_parent_offset); 4779 } 4780 4781 // Returns the name field of this class loader. If the name field has not 4782 // been set, null will be returned. 4783 oop java_lang_ClassLoader::name(oop loader) { 4784 assert(is_instance(loader), "loader must be oop"); 4785 return loader->obj_field(_name_offset); 4786 } 4787 4788 // Returns the nameAndId field of this class loader. The format is 4789 // as follows: 4790 // If the defining loader has a name explicitly set then '<loader-name>' @<id> 4791 // If the defining loader has no name then <qualified-class-name> @<id> 4792 // If built-in loader, then omit '@<id>' as there is only one instance. 4793 // Use ClassLoader::loader_name_id() to obtain this String as a char*. 4794 oop java_lang_ClassLoader::nameAndId(oop loader) { 4795 assert(is_instance(loader), "loader must be oop"); 4796 return loader->obj_field(_nameAndId_offset); 4797 } 4798 4799 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) { 4800 assert(is_instance(loader), "loader must be oop"); 4801 assert(cl == nullptr || is_instance(cl), "cl argument must be oop"); 4802 oop acl = loader; 4803 debug_only(jint loop_count = 0); 4804 // This loop taken verbatim from ClassLoader.java: 4805 do { 4806 acl = parent(acl); 4807 if (cl == acl) { 4808 return true; 4809 } 4810 assert(++loop_count > 0, "loop_count overflow"); 4811 } while (acl != nullptr); 4812 return false; 4813 } 4814 4815 bool java_lang_ClassLoader::is_instance(oop obj) { 4816 return obj != nullptr && is_subclass(obj->klass()); 4817 } 4818 4819 4820 // For class loader classes, parallelCapable defined 4821 // based on non-null field 4822 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it 4823 bool java_lang_ClassLoader::parallelCapable(oop class_loader) { 4824 assert(_parallelCapable_offset != 0, "offsets should have been initialized"); 4825 return (class_loader->obj_field(_parallelCapable_offset) != nullptr); 4826 } 4827 4828 bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 4829 // Fix for 4474172; see evaluation for more details 4830 loader = non_reflection_class_loader(loader); 4831 4832 oop cl = SystemDictionary::java_system_loader(); 4833 while(cl != nullptr) { 4834 if (cl == loader) return true; 4835 cl = parent(cl); 4836 } 4837 return false; 4838 } 4839 4840 // Return true if this is one of the class loaders associated with 4841 // the generated bytecodes for serialization constructor returned 4842 // by sun.reflect.ReflectionFactory::newConstructorForSerialization 4843 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) { 4844 if (loader != nullptr) { 4845 Klass* delegating_cl_class = vmClasses::reflect_DelegatingClassLoader_klass(); 4846 // This might be null in non-1.4 JDKs 4847 return (delegating_cl_class != nullptr && loader->is_a(delegating_cl_class)); 4848 } 4849 return false; 4850 } 4851 4852 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) { 4853 // See whether this is one of the class loaders associated with 4854 // the generated bytecodes for reflection, and if so, "magically" 4855 // delegate to its parent to prevent class loading from occurring 4856 // in places where applications using reflection didn't expect it. 4857 if (is_reflection_class_loader(loader)) { 4858 return parent(loader); 4859 } 4860 return loader; 4861 } 4862 4863 oop java_lang_ClassLoader::unnamedModule(oop loader) { 4864 assert(is_instance(loader), "loader must be oop"); 4865 return loader->obj_field(_unnamedModule_offset); 4866 } 4867 4868 // Support for java_lang_System 4869 // 4870 4871 int java_lang_System::_static_in_offset; 4872 int java_lang_System::_static_out_offset; 4873 int java_lang_System::_static_err_offset; 4874 int java_lang_System::_static_security_offset; 4875 int java_lang_System::_static_allow_security_offset; 4876 int java_lang_System::_static_never_offset; 4877 4878 #define SYSTEM_FIELDS_DO(macro) \ 4879 macro(_static_in_offset, k, "in", input_stream_signature, true); \ 4880 macro(_static_out_offset, k, "out", print_stream_signature, true); \ 4881 macro(_static_err_offset, k, "err", print_stream_signature, true); \ 4882 macro(_static_security_offset, k, "security", security_manager_signature, true); \ 4883 macro(_static_allow_security_offset, k, "allowSecurityManager", int_signature, true); \ 4884 macro(_static_never_offset, k, "NEVER", int_signature, true) 4885 4886 void java_lang_System::compute_offsets() { 4887 InstanceKlass* k = vmClasses::System_klass(); 4888 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4889 } 4890 4891 // This field tells us that a security manager can never be installed so we 4892 // can completely skip populating the ProtectionDomainCacheTable. 4893 bool java_lang_System::allow_security_manager() { 4894 static int initialized = false; 4895 static bool allowed = true; // default 4896 if (!initialized) { 4897 oop base = vmClasses::System_klass()->static_field_base_raw(); 4898 int never = base->int_field(_static_never_offset); 4899 allowed = (base->int_field(_static_allow_security_offset) != never); 4900 initialized = true; 4901 } 4902 return allowed; 4903 } 4904 4905 // This field tells us that a security manager is installed. 4906 bool java_lang_System::has_security_manager() { 4907 oop base = vmClasses::System_klass()->static_field_base_raw(); 4908 return base->obj_field(_static_security_offset) != nullptr; 4909 } 4910 4911 #if INCLUDE_CDS 4912 void java_lang_System::serialize_offsets(SerializeClosure* f) { 4913 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4914 } 4915 #endif 4916 4917 // Support for jdk_internal_misc_UnsafeConstants 4918 // 4919 class UnsafeConstantsFixup : public FieldClosure { 4920 private: 4921 int _address_size; 4922 int _page_size; 4923 bool _big_endian; 4924 bool _use_unaligned_access; 4925 int _data_cache_line_flush_size; 4926 public: 4927 UnsafeConstantsFixup() { 4928 // round up values for all static final fields 4929 _address_size = sizeof(void*); 4930 _page_size = AIX_ONLY(sysconf(_SC_PAGESIZE)) NOT_AIX((int)os::vm_page_size()); 4931 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true); 4932 _use_unaligned_access = UseUnalignedAccesses; 4933 _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size(); 4934 } 4935 4936 void do_field(fieldDescriptor* fd) { 4937 oop mirror = fd->field_holder()->java_mirror(); 4938 assert(mirror != nullptr, "UnsafeConstants must have mirror already"); 4939 assert(fd->field_holder() == vmClasses::UnsafeConstants_klass(), "Should be UnsafeConstants"); 4940 assert(fd->is_final(), "fields of UnsafeConstants must be final"); 4941 assert(fd->is_static(), "fields of UnsafeConstants must be static"); 4942 if (fd->name() == vmSymbols::address_size_name()) { 4943 mirror->int_field_put(fd->offset(), _address_size); 4944 } else if (fd->name() == vmSymbols::page_size_name()) { 4945 mirror->int_field_put(fd->offset(), _page_size); 4946 } else if (fd->name() == vmSymbols::big_endian_name()) { 4947 mirror->bool_field_put(fd->offset(), _big_endian); 4948 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) { 4949 mirror->bool_field_put(fd->offset(), _use_unaligned_access); 4950 } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) { 4951 mirror->int_field_put(fd->offset(), _data_cache_line_flush_size); 4952 } else { 4953 assert(false, "unexpected UnsafeConstants field"); 4954 } 4955 } 4956 }; 4957 4958 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() { 4959 UnsafeConstantsFixup fixup; 4960 vmClasses::UnsafeConstants_klass()->do_local_static_fields(&fixup); 4961 } 4962 4963 4964 // java_lang_StackTraceElement 4965 4966 int java_lang_StackTraceElement::_methodName_offset; 4967 int java_lang_StackTraceElement::_fileName_offset; 4968 int java_lang_StackTraceElement::_lineNumber_offset; 4969 int java_lang_StackTraceElement::_moduleName_offset; 4970 int java_lang_StackTraceElement::_moduleVersion_offset; 4971 int java_lang_StackTraceElement::_classLoaderName_offset; 4972 int java_lang_StackTraceElement::_declaringClass_offset; 4973 int java_lang_StackTraceElement::_declaringClassObject_offset; 4974 4975 #define STACKTRACEELEMENT_FIELDS_DO(macro) \ 4976 macro(_declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \ 4977 macro(_classLoaderName_offset, k, "classLoaderName", string_signature, false); \ 4978 macro(_moduleName_offset, k, "moduleName", string_signature, false); \ 4979 macro(_moduleVersion_offset, k, "moduleVersion", string_signature, false); \ 4980 macro(_declaringClass_offset, k, "declaringClass", string_signature, false); \ 4981 macro(_methodName_offset, k, "methodName", string_signature, false); \ 4982 macro(_fileName_offset, k, "fileName", string_signature, false); \ 4983 macro(_lineNumber_offset, k, "lineNumber", int_signature, false) 4984 4985 // Support for java_lang_StackTraceElement 4986 void java_lang_StackTraceElement::compute_offsets() { 4987 InstanceKlass* k = vmClasses::StackTraceElement_klass(); 4988 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4989 } 4990 4991 #if INCLUDE_CDS 4992 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) { 4993 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4994 } 4995 #endif 4996 4997 void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 4998 element->obj_field_put(_fileName_offset, value); 4999 } 5000 5001 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 5002 element->obj_field_put(_declaringClass_offset, value); 5003 } 5004 5005 void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 5006 element->obj_field_put(_methodName_offset, value); 5007 } 5008 5009 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 5010 element->int_field_put(_lineNumber_offset, value); 5011 } 5012 5013 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) { 5014 element->obj_field_put(_moduleName_offset, value); 5015 } 5016 5017 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) { 5018 element->obj_field_put(_moduleVersion_offset, value); 5019 } 5020 5021 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) { 5022 element->obj_field_put(_classLoaderName_offset, value); 5023 } 5024 5025 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) { 5026 element->obj_field_put(_declaringClassObject_offset, value); 5027 } 5028 5029 5030 // java_lang_AssertionStatusDirectives 5031 5032 int java_lang_AssertionStatusDirectives::_classes_offset; 5033 int java_lang_AssertionStatusDirectives::_classEnabled_offset; 5034 int java_lang_AssertionStatusDirectives::_packages_offset; 5035 int java_lang_AssertionStatusDirectives::_packageEnabled_offset; 5036 int java_lang_AssertionStatusDirectives::_deflt_offset; 5037 5038 // Support for java Assertions - java_lang_AssertionStatusDirectives. 5039 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \ 5040 macro(_classes_offset, k, "classes", string_array_signature, false); \ 5041 macro(_classEnabled_offset, k, "classEnabled", bool_array_signature, false); \ 5042 macro(_packages_offset, k, "packages", string_array_signature, false); \ 5043 macro(_packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \ 5044 macro(_deflt_offset, k, "deflt", bool_signature, false) 5045 5046 void java_lang_AssertionStatusDirectives::compute_offsets() { 5047 InstanceKlass* k = vmClasses::AssertionStatusDirectives_klass(); 5048 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5049 } 5050 5051 #if INCLUDE_CDS 5052 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) { 5053 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5054 } 5055 #endif 5056 5057 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 5058 o->obj_field_put(_classes_offset, val); 5059 } 5060 5061 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 5062 o->obj_field_put(_classEnabled_offset, val); 5063 } 5064 5065 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 5066 o->obj_field_put(_packages_offset, val); 5067 } 5068 5069 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 5070 o->obj_field_put(_packageEnabled_offset, val); 5071 } 5072 5073 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 5074 o->bool_field_put(_deflt_offset, val); 5075 } 5076 5077 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset; 5078 5079 #define AOS_FIELDS_DO(macro) \ 5080 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false) 5081 5082 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() { 5083 InstanceKlass* k = vmClasses::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass(); 5084 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5085 } 5086 5087 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 5088 assert(_owner_offset != 0, "Must be initialized"); 5089 return obj->obj_field(_owner_offset); 5090 } 5091 5092 #if INCLUDE_CDS 5093 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) { 5094 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5095 } 5096 #endif 5097 5098 int vector_VectorPayload::_payload_offset; 5099 5100 #define VECTORPAYLOAD_FIELDS_DO(macro) \ 5101 macro(_payload_offset, k, "payload", object_signature, false) 5102 5103 void vector_VectorPayload::compute_offsets() { 5104 InstanceKlass* k = vmClasses::vector_VectorPayload_klass(); 5105 VECTORPAYLOAD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5106 } 5107 5108 #if INCLUDE_CDS 5109 void vector_VectorPayload::serialize_offsets(SerializeClosure* f) { 5110 VECTORPAYLOAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5111 } 5112 #endif 5113 5114 void vector_VectorPayload::set_payload(oop o, oop val) { 5115 o->obj_field_put(_payload_offset, val); 5116 } 5117 5118 bool vector_VectorPayload::is_instance(oop obj) { 5119 return obj != nullptr && is_subclass(obj->klass()); 5120 } 5121 5122 int java_lang_Integer_IntegerCache::_static_cache_offset; 5123 int java_lang_Long_LongCache::_static_cache_offset; 5124 int java_lang_Character_CharacterCache::_static_cache_offset; 5125 int java_lang_Short_ShortCache::_static_cache_offset; 5126 int java_lang_Byte_ByteCache::_static_cache_offset; 5127 5128 #define INTEGER_CACHE_FIELDS_DO(macro) \ 5129 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true) 5130 5131 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) { 5132 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5133 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5134 } 5135 5136 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) { 5137 oop base = ik->static_field_base_raw(); 5138 return objArrayOop(base->obj_field(_static_cache_offset)); 5139 } 5140 5141 Symbol* java_lang_Integer_IntegerCache::symbol() { 5142 return vmSymbols::java_lang_Integer_IntegerCache(); 5143 } 5144 5145 #if INCLUDE_CDS 5146 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) { 5147 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5148 } 5149 #endif 5150 #undef INTEGER_CACHE_FIELDS_DO 5151 5152 jint java_lang_Integer::value(oop obj) { 5153 jvalue v; 5154 java_lang_boxing_object::get_value(obj, &v); 5155 return v.i; 5156 } 5157 5158 #define LONG_CACHE_FIELDS_DO(macro) \ 5159 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true) 5160 5161 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) { 5162 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5163 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5164 } 5165 5166 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) { 5167 oop base = ik->static_field_base_raw(); 5168 return objArrayOop(base->obj_field(_static_cache_offset)); 5169 } 5170 5171 Symbol* java_lang_Long_LongCache::symbol() { 5172 return vmSymbols::java_lang_Long_LongCache(); 5173 } 5174 5175 #if INCLUDE_CDS 5176 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) { 5177 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5178 } 5179 #endif 5180 #undef LONG_CACHE_FIELDS_DO 5181 5182 jlong java_lang_Long::value(oop obj) { 5183 jvalue v; 5184 java_lang_boxing_object::get_value(obj, &v); 5185 return v.j; 5186 } 5187 5188 #define CHARACTER_CACHE_FIELDS_DO(macro) \ 5189 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true) 5190 5191 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) { 5192 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5193 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5194 } 5195 5196 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) { 5197 oop base = ik->static_field_base_raw(); 5198 return objArrayOop(base->obj_field(_static_cache_offset)); 5199 } 5200 5201 Symbol* java_lang_Character_CharacterCache::symbol() { 5202 return vmSymbols::java_lang_Character_CharacterCache(); 5203 } 5204 5205 #if INCLUDE_CDS 5206 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) { 5207 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5208 } 5209 #endif 5210 #undef CHARACTER_CACHE_FIELDS_DO 5211 5212 jchar java_lang_Character::value(oop obj) { 5213 jvalue v; 5214 java_lang_boxing_object::get_value(obj, &v); 5215 return v.c; 5216 } 5217 5218 #define SHORT_CACHE_FIELDS_DO(macro) \ 5219 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true) 5220 5221 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) { 5222 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5223 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5224 } 5225 5226 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) { 5227 oop base = ik->static_field_base_raw(); 5228 return objArrayOop(base->obj_field(_static_cache_offset)); 5229 } 5230 5231 Symbol* java_lang_Short_ShortCache::symbol() { 5232 return vmSymbols::java_lang_Short_ShortCache(); 5233 } 5234 5235 #if INCLUDE_CDS 5236 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) { 5237 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5238 } 5239 #endif 5240 #undef SHORT_CACHE_FIELDS_DO 5241 5242 jshort java_lang_Short::value(oop obj) { 5243 jvalue v; 5244 java_lang_boxing_object::get_value(obj, &v); 5245 return v.s; 5246 } 5247 5248 #define BYTE_CACHE_FIELDS_DO(macro) \ 5249 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true) 5250 5251 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) { 5252 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5253 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5254 } 5255 5256 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) { 5257 oop base = ik->static_field_base_raw(); 5258 return objArrayOop(base->obj_field(_static_cache_offset)); 5259 } 5260 5261 Symbol* java_lang_Byte_ByteCache::symbol() { 5262 return vmSymbols::java_lang_Byte_ByteCache(); 5263 } 5264 5265 #if INCLUDE_CDS 5266 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) { 5267 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5268 } 5269 #endif 5270 #undef BYTE_CACHE_FIELDS_DO 5271 5272 jbyte java_lang_Byte::value(oop obj) { 5273 jvalue v; 5274 java_lang_boxing_object::get_value(obj, &v); 5275 return v.b; 5276 } 5277 5278 int java_lang_Boolean::_static_TRUE_offset; 5279 int java_lang_Boolean::_static_FALSE_offset; 5280 5281 #define BOOLEAN_FIELDS_DO(macro) \ 5282 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \ 5283 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true) 5284 5285 5286 void java_lang_Boolean::compute_offsets(InstanceKlass *k) { 5287 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5288 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5289 } 5290 5291 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) { 5292 oop base = ik->static_field_base_raw(); 5293 return base->obj_field(_static_TRUE_offset); 5294 } 5295 5296 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) { 5297 oop base = ik->static_field_base_raw(); 5298 return base->obj_field(_static_FALSE_offset); 5299 } 5300 5301 Symbol* java_lang_Boolean::symbol() { 5302 return vmSymbols::java_lang_Boolean(); 5303 } 5304 5305 #if INCLUDE_CDS 5306 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) { 5307 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5308 } 5309 #endif 5310 #undef BOOLEAN_CACHE_FIELDS_DO 5311 5312 jboolean java_lang_Boolean::value(oop obj) { 5313 jvalue v; 5314 java_lang_boxing_object::get_value(obj, &v); 5315 return v.z; 5316 } 5317 5318 // java_lang_reflect_RecordComponent 5319 5320 int java_lang_reflect_RecordComponent::_clazz_offset; 5321 int java_lang_reflect_RecordComponent::_name_offset; 5322 int java_lang_reflect_RecordComponent::_type_offset; 5323 int java_lang_reflect_RecordComponent::_accessor_offset; 5324 int java_lang_reflect_RecordComponent::_signature_offset; 5325 int java_lang_reflect_RecordComponent::_annotations_offset; 5326 int java_lang_reflect_RecordComponent::_typeAnnotations_offset; 5327 5328 #define RECORDCOMPONENT_FIELDS_DO(macro) \ 5329 macro(_clazz_offset, k, "clazz", class_signature, false); \ 5330 macro(_name_offset, k, "name", string_signature, false); \ 5331 macro(_type_offset, k, "type", class_signature, false); \ 5332 macro(_accessor_offset, k, "accessor", reflect_method_signature, false); \ 5333 macro(_signature_offset, k, "signature", string_signature, false); \ 5334 macro(_annotations_offset, k, "annotations", byte_array_signature, false); \ 5335 macro(_typeAnnotations_offset, k, "typeAnnotations", byte_array_signature, false); 5336 5337 // Support for java_lang_reflect_RecordComponent 5338 void java_lang_reflect_RecordComponent::compute_offsets() { 5339 InstanceKlass* k = vmClasses::RecordComponent_klass(); 5340 RECORDCOMPONENT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5341 } 5342 5343 #if INCLUDE_CDS 5344 void java_lang_reflect_RecordComponent::serialize_offsets(SerializeClosure* f) { 5345 RECORDCOMPONENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5346 } 5347 #endif 5348 5349 void java_lang_reflect_RecordComponent::set_clazz(oop element, oop value) { 5350 element->obj_field_put(_clazz_offset, value); 5351 } 5352 5353 void java_lang_reflect_RecordComponent::set_name(oop element, oop value) { 5354 element->obj_field_put(_name_offset, value); 5355 } 5356 5357 void java_lang_reflect_RecordComponent::set_type(oop element, oop value) { 5358 element->obj_field_put(_type_offset, value); 5359 } 5360 5361 void java_lang_reflect_RecordComponent::set_accessor(oop element, oop value) { 5362 element->obj_field_put(_accessor_offset, value); 5363 } 5364 5365 void java_lang_reflect_RecordComponent::set_signature(oop element, oop value) { 5366 element->obj_field_put(_signature_offset, value); 5367 } 5368 5369 void java_lang_reflect_RecordComponent::set_annotations(oop element, oop value) { 5370 element->obj_field_put(_annotations_offset, value); 5371 } 5372 5373 void java_lang_reflect_RecordComponent::set_typeAnnotations(oop element, oop value) { 5374 element->obj_field_put(_typeAnnotations_offset, value); 5375 } 5376 5377 // java_lang_InternalError 5378 int java_lang_InternalError::_during_unsafe_access_offset; 5379 5380 void java_lang_InternalError::set_during_unsafe_access(oop internal_error) { 5381 internal_error->bool_field_put(_during_unsafe_access_offset, true); 5382 } 5383 5384 jboolean java_lang_InternalError::during_unsafe_access(oop internal_error) { 5385 return internal_error->bool_field(_during_unsafe_access_offset); 5386 } 5387 5388 void java_lang_InternalError::compute_offsets() { 5389 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 5390 } 5391 5392 #if INCLUDE_CDS 5393 void java_lang_InternalError::serialize_offsets(SerializeClosure* f) { 5394 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 5395 } 5396 #endif 5397 5398 #define BASIC_JAVA_CLASSES_DO_PART1(f) \ 5399 f(java_lang_Class) \ 5400 f(java_lang_String) \ 5401 f(java_lang_ref_Reference) \ 5402 //end 5403 5404 #define BASIC_JAVA_CLASSES_DO_PART2(f) \ 5405 f(java_lang_System) \ 5406 f(java_lang_ClassLoader) \ 5407 f(java_lang_Throwable) \ 5408 f(java_lang_Thread) \ 5409 f(java_lang_Thread_FieldHolder) \ 5410 f(java_lang_Thread_Constants) \ 5411 f(java_lang_ThreadGroup) \ 5412 f(java_lang_VirtualThread) \ 5413 f(java_lang_InternalError) \ 5414 f(java_lang_AssertionStatusDirectives) \ 5415 f(java_lang_ref_SoftReference) \ 5416 f(java_lang_invoke_MethodHandle) \ 5417 f(java_lang_invoke_DirectMethodHandle) \ 5418 f(java_lang_invoke_MemberName) \ 5419 f(java_lang_invoke_ResolvedMethodName) \ 5420 f(java_lang_invoke_LambdaForm) \ 5421 f(java_lang_invoke_MethodType) \ 5422 f(java_lang_invoke_CallSite) \ 5423 f(java_lang_invoke_ConstantCallSite) \ 5424 f(java_lang_invoke_MethodHandleNatives_CallSiteContext) \ 5425 f(java_security_AccessControlContext) \ 5426 f(java_lang_reflect_AccessibleObject) \ 5427 f(java_lang_reflect_Method) \ 5428 f(java_lang_reflect_Constructor) \ 5429 f(java_lang_reflect_Field) \ 5430 f(java_lang_reflect_RecordComponent) \ 5431 f(reflect_ConstantPool) \ 5432 f(java_lang_reflect_Parameter) \ 5433 f(java_lang_Module) \ 5434 f(java_lang_StackTraceElement) \ 5435 f(java_lang_ClassFrameInfo) \ 5436 f(java_lang_StackFrameInfo) \ 5437 f(java_lang_LiveStackFrameInfo) \ 5438 f(jdk_internal_vm_ContinuationScope) \ 5439 f(jdk_internal_vm_Continuation) \ 5440 f(jdk_internal_vm_StackChunk) \ 5441 f(java_util_concurrent_locks_AbstractOwnableSynchronizer) \ 5442 f(jdk_internal_foreign_abi_NativeEntryPoint) \ 5443 f(jdk_internal_foreign_abi_ABIDescriptor) \ 5444 f(jdk_internal_foreign_abi_VMStorage) \ 5445 f(jdk_internal_foreign_abi_CallConv) \ 5446 f(jdk_internal_misc_UnsafeConstants) \ 5447 f(java_lang_boxing_object) \ 5448 f(vector_VectorPayload) \ 5449 //end 5450 5451 #define BASIC_JAVA_CLASSES_DO(f) \ 5452 BASIC_JAVA_CLASSES_DO_PART1(f) \ 5453 BASIC_JAVA_CLASSES_DO_PART2(f) 5454 5455 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets(); 5456 5457 // Compute field offsets of all the classes in this file 5458 void JavaClasses::compute_offsets() { 5459 if (CDSConfig::is_using_archive()) { 5460 JVMTI_ONLY(assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() && 5461 JvmtiExport::has_early_class_hook_env()), 5462 "JavaClasses::compute_offsets() must be called in early JVMTI phase.")); 5463 // None of the classes used by the rest of this function can be replaced by 5464 // JVMTI ClassFileLoadHook. 5465 // We are safe to use the archived offsets, which have already been restored 5466 // by JavaClasses::serialize_offsets, without computing the offsets again. 5467 return; 5468 } 5469 5470 // We have already called the compute_offsets() of the 5471 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String, java_lang_Class and 5472 // java_lang_ref_Reference) earlier inside vmClasses::resolve_all() 5473 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS); 5474 } 5475 5476 #if INCLUDE_CDS 5477 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc); 5478 5479 void JavaClasses::serialize_offsets(SerializeClosure* soc) { 5480 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS); 5481 } 5482 #endif 5483 5484 #if INCLUDE_CDS_JAVA_HEAP 5485 bool JavaClasses::is_supported_for_archiving(oop obj) { 5486 Klass* klass = obj->klass(); 5487 5488 if (klass == vmClasses::ClassLoader_klass() || // ClassLoader::loader_data is malloc'ed. 5489 // The next 3 classes are used to implement java.lang.invoke, and are not used directly in 5490 // regular Java code. The implementation of java.lang.invoke uses generated hidden classes 5491 // (e.g., as referenced by ResolvedMethodName::vmholder) that are not yet supported by CDS. 5492 // So for now we cannot not support these classes for archiving. 5493 // 5494 // These objects typically are not referenced by static fields, but rather by resolved 5495 // constant pool entries, so excluding them shouldn't affect the archiving of static fields. 5496 klass == vmClasses::ResolvedMethodName_klass() || 5497 klass == vmClasses::MemberName_klass() || 5498 klass == vmClasses::Context_klass() || 5499 // It's problematic to archive Reference objects. One of the reasons is that 5500 // Reference::discovered may pull in unwanted objects (see JDK-8284336) 5501 klass->is_subclass_of(vmClasses::Reference_klass())) { 5502 return false; 5503 } 5504 5505 return true; 5506 } 5507 #endif 5508 5509 #ifndef PRODUCT 5510 5511 // These functions exist to assert the validity of de-serialized offsets in boxing object as a sanity check. 5512 5513 bool JavaClasses::check_offset(const char *klass_name, int deserialized_offset, const char *field_name, 5514 const char* field_sig) { 5515 EXCEPTION_MARK; 5516 fieldDescriptor fd; 5517 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name); 5518 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 5519 InstanceKlass* ik = InstanceKlass::cast(k); 5520 TempNewSymbol f_name = SymbolTable::new_symbol(field_name); 5521 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig); 5522 if (!ik->find_local_field(f_name, f_sig, &fd)) { 5523 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 5524 return false; 5525 } 5526 if (fd.is_static()) { 5527 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 5528 return false; 5529 } 5530 if (fd.offset() == deserialized_offset ) { 5531 return true; 5532 } else { 5533 tty->print_cr("Offset of nonstatic field %s.%s is deserialized as %d but should really be %d.", 5534 klass_name, field_name, deserialized_offset, fd.offset()); 5535 return false; 5536 } 5537 } 5538 5539 void JavaClasses::check_offsets() { 5540 bool valid = true; 5541 5542 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 5543 valid &= check_offset(klass_name, cpp_klass_name :: _##field_name ## _offset, #field_name, field_sig) 5544 5545 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 5546 valid &= check_offset(klass_name, cpp_klass_name :: _##long_ ## field_name ## _offset, #field_name, field_sig) 5547 5548 // Boxed primitive objects (java_lang_boxing_object) 5549 5550 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 5551 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 5552 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 5553 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 5554 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 5555 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 5556 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 5557 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 5558 5559 if (!valid) vm_exit_during_initialization("Field offset verification failed"); 5560 } 5561 5562 #endif // PRODUCT 5563 5564 int InjectedField::compute_offset() { 5565 InstanceKlass* ik = InstanceKlass::cast(klass()); 5566 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 5567 if (!may_be_java && !fs.field_flags().is_injected()) { 5568 // Only look at injected fields 5569 continue; 5570 } 5571 if (fs.name() == name() && fs.signature() == signature()) { 5572 return fs.offset(); 5573 } 5574 } 5575 ResourceMark rm; 5576 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)" : ""); 5577 #ifndef PRODUCT 5578 ik->print(); 5579 tty->print_cr("all fields:"); 5580 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 5581 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 5582 } 5583 #endif //PRODUCT 5584 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class"); 5585 return -1; 5586 } 5587 5588 void javaClasses_init() { 5589 JavaClasses::compute_offsets(); 5590 JavaClasses::check_offsets(); 5591 FilteredFieldsMap::initialize(); // must be done after computing offsets. 5592 }