1 /* 2 * Copyright (c) 1997, 2024, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "cds/archiveBuilder.hpp" 27 #include "cds/archiveHeapLoader.hpp" 28 #include "cds/cdsConfig.hpp" 29 #include "cds/heapShared.hpp" 30 #include "cds/metaspaceShared.hpp" 31 #include "classfile/altHashing.hpp" 32 #include "classfile/classLoaderData.inline.hpp" 33 #include "classfile/javaClasses.inline.hpp" 34 #include "classfile/javaClassesImpl.hpp" 35 #include "classfile/javaThreadStatus.hpp" 36 #include "classfile/moduleEntry.hpp" 37 #include "classfile/stringTable.hpp" 38 #include "classfile/symbolTable.hpp" 39 #include "classfile/systemDictionary.hpp" 40 #include "classfile/vmClasses.hpp" 41 #include "classfile/vmSymbols.hpp" 42 #include "code/debugInfo.hpp" 43 #include "code/dependencyContext.hpp" 44 #include "code/pcDesc.hpp" 45 #include "gc/shared/collectedHeap.inline.hpp" 46 #include "interpreter/interpreter.hpp" 47 #include "interpreter/linkResolver.hpp" 48 #include "jvm.h" 49 #include "logging/log.hpp" 50 #include "logging/logStream.hpp" 51 #include "memory/oopFactory.hpp" 52 #include "memory/resourceArea.hpp" 53 #include "memory/universe.hpp" 54 #include "oops/fieldInfo.hpp" 55 #include "oops/fieldStreams.inline.hpp" 56 #include "oops/instanceKlass.inline.hpp" 57 #include "oops/instanceMirrorKlass.hpp" 58 #include "oops/klass.hpp" 59 #include "oops/klass.inline.hpp" 60 #include "oops/method.inline.hpp" 61 #include "oops/objArrayKlass.hpp" 62 #include "oops/objArrayOop.inline.hpp" 63 #include "oops/oopCast.inline.hpp" 64 #include "oops/oop.inline.hpp" 65 #include "oops/symbol.hpp" 66 #include "oops/recordComponent.hpp" 67 #include "oops/typeArrayOop.inline.hpp" 68 #include "prims/jvmtiExport.hpp" 69 #include "prims/methodHandles.hpp" 70 #include "prims/resolvedMethodTable.hpp" 71 #include "runtime/continuationEntry.inline.hpp" 72 #include "runtime/continuationJavaClasses.inline.hpp" 73 #include "runtime/fieldDescriptor.inline.hpp" 74 #include "runtime/frame.inline.hpp" 75 #include "runtime/handles.inline.hpp" 76 #include "runtime/handshake.hpp" 77 #include "runtime/init.hpp" 78 #include "runtime/interfaceSupport.inline.hpp" 79 #include "runtime/java.hpp" 80 #include "runtime/javaCalls.hpp" 81 #include "runtime/javaThread.hpp" 82 #include "runtime/jniHandles.inline.hpp" 83 #include "runtime/reflectionUtils.hpp" 84 #include "runtime/safepoint.hpp" 85 #include "runtime/safepointVerifiers.hpp" 86 #include "runtime/threadSMR.hpp" 87 #include "runtime/vframe.inline.hpp" 88 #include "runtime/vm_version.hpp" 89 #include "utilities/align.hpp" 90 #include "utilities/globalDefinitions.hpp" 91 #include "utilities/growableArray.hpp" 92 #include "utilities/preserveException.hpp" 93 #include "utilities/utf8.hpp" 94 #if INCLUDE_JVMCI 95 #include "jvmci/jvmciJavaClasses.hpp" 96 #endif 97 98 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \ 99 { VM_CLASS_ID(klass), VM_SYMBOL_ENUM_NAME(name##_name), VM_SYMBOL_ENUM_NAME(signature), may_be_java }, 100 101 InjectedField JavaClasses::_injected_fields[] = { 102 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD) 103 }; 104 105 // Register native methods of Object 106 void java_lang_Object::register_natives(TRAPS) { 107 InstanceKlass* obj = vmClasses::Object_klass(); 108 Method::register_native(obj, vmSymbols::hashCode_name(), 109 vmSymbols::void_int_signature(), (address) &JVM_IHashCode, CHECK); 110 Method::register_native(obj, vmSymbols::wait_name(), 111 vmSymbols::long_void_signature(), (address) &JVM_MonitorWait, CHECK); 112 Method::register_native(obj, vmSymbols::notify_name(), 113 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotify, CHECK); 114 Method::register_native(obj, vmSymbols::notifyAll_name(), 115 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotifyAll, CHECK); 116 Method::register_native(obj, vmSymbols::clone_name(), 117 vmSymbols::void_object_signature(), (address) &JVM_Clone, THREAD); 118 } 119 120 int JavaClasses::compute_injected_offset(InjectedFieldID id) { 121 return _injected_fields[(int)id].compute_offset(); 122 } 123 124 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) { 125 *field_count = 0; 126 127 vmSymbolID sid = vmSymbols::find_sid(class_name); 128 if (sid == vmSymbolID::NO_SID) { 129 // Only well known classes can inject fields 130 return nullptr; 131 } 132 133 int count = 0; 134 int start = -1; 135 136 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \ 137 if (sid == VM_SYMBOL_ENUM_NAME(klass)) { \ 138 count++; \ 139 if (start == -1) { \ 140 start = (int)InjectedFieldID::klass##_##name##_enum; \ 141 } \ 142 } 143 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD); 144 #undef LOOKUP_INJECTED_FIELD 145 146 if (start != -1) { 147 *field_count = count; 148 return _injected_fields + start; 149 } 150 return nullptr; 151 } 152 153 154 // Helpful routine for computing field offsets at run time rather than hardcoding them 155 // Finds local fields only, including static fields. Static field offsets are from the 156 // beginning of the mirror. 157 void JavaClasses::compute_offset(int &dest_offset, 158 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol, 159 bool is_static) { 160 fieldDescriptor fd; 161 if (ik == nullptr) { 162 ResourceMark rm; 163 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string()); 164 vm_exit_during_initialization("Invalid layout of well-known class"); 165 } 166 167 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) { 168 ResourceMark rm; 169 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(), 170 name_symbol->as_C_string(), signature_symbol->as_C_string()); 171 #ifndef PRODUCT 172 // Prints all fields and offsets 173 Log(class) lt; 174 LogStream ls(lt.error()); 175 ik->print_on(&ls); 176 #endif //PRODUCT 177 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class"); 178 } 179 dest_offset = fd.offset(); 180 } 181 182 // Overloading to pass name as a string. 183 void JavaClasses::compute_offset(int& dest_offset, InstanceKlass* ik, 184 const char* name_string, Symbol* signature_symbol, 185 bool is_static) { 186 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string)); 187 if (name == nullptr) { 188 ResourceMark rm; 189 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string); 190 vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name()); 191 } 192 compute_offset(dest_offset, ik, name, signature_symbol, is_static); 193 } 194 195 // java_lang_String 196 197 int java_lang_String::_value_offset; 198 int java_lang_String::_hash_offset; 199 int java_lang_String::_hashIsZero_offset; 200 int java_lang_String::_coder_offset; 201 int java_lang_String::_flags_offset; 202 203 bool java_lang_String::_initialized; 204 205 206 bool java_lang_String::test_and_set_flag(oop java_string, uint8_t flag_mask) { 207 uint8_t* addr = flags_addr(java_string); 208 uint8_t value = Atomic::load(addr); 209 while ((value & flag_mask) == 0) { 210 uint8_t old_value = value; 211 value |= flag_mask; 212 value = Atomic::cmpxchg(addr, old_value, value); 213 if (value == old_value) return false; // Flag bit changed from 0 to 1. 214 } 215 return true; // Flag bit is already 1. 216 } 217 218 #define STRING_FIELDS_DO(macro) \ 219 macro(_value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \ 220 macro(_hash_offset, k, "hash", int_signature, false); \ 221 macro(_hashIsZero_offset, k, "hashIsZero", bool_signature, false); \ 222 macro(_coder_offset, k, "coder", byte_signature, false); 223 224 void java_lang_String::compute_offsets() { 225 if (_initialized) { 226 return; 227 } 228 229 InstanceKlass* k = vmClasses::String_klass(); 230 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET); 231 STRING_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 232 233 _initialized = true; 234 } 235 236 #if INCLUDE_CDS 237 void java_lang_String::serialize_offsets(SerializeClosure* f) { 238 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 239 STRING_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 240 f->do_bool(&_initialized); 241 } 242 #endif 243 244 class CompactStringsFixup : public FieldClosure { 245 private: 246 bool _value; 247 248 public: 249 CompactStringsFixup(bool value) : _value(value) {} 250 251 void do_field(fieldDescriptor* fd) { 252 if (fd->name() == vmSymbols::compact_strings_name()) { 253 oop mirror = fd->field_holder()->java_mirror(); 254 assert(fd->field_holder() == vmClasses::String_klass(), "Should be String"); 255 assert(mirror != nullptr, "String must have mirror already"); 256 mirror->bool_field_put(fd->offset(), _value); 257 } 258 } 259 }; 260 261 void java_lang_String::set_compact_strings(bool value) { 262 CompactStringsFixup fix(value); 263 vmClasses::String_klass()->do_local_static_fields(&fix); 264 } 265 266 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) { 267 assert(_initialized, "Must be initialized"); 268 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings"); 269 270 // Create the String object first, so there's a chance that the String 271 // and the char array it points to end up in the same cache line. 272 oop obj; 273 obj = vmClasses::String_klass()->allocate_instance(CHECK_NH); 274 275 // Create the char array. The String object must be handlized here 276 // because GC can happen as a result of the allocation attempt. 277 Handle h_obj(THREAD, obj); 278 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16. 279 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);; 280 281 // Point the String at the char array 282 obj = h_obj(); 283 set_value(obj, buffer); 284 // No need to zero the offset, allocation zero'ed the entire String object 285 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16); 286 return h_obj; 287 } 288 289 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) { 290 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length); 291 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 292 typeArrayOop buffer = value(h_obj()); 293 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]"); 294 if (is_latin1) { 295 for (int index = 0; index < length; index++) { 296 buffer->byte_at_put(index, (jbyte)unicode[index]); 297 } 298 } else { 299 for (int index = 0; index < length; index++) { 300 buffer->char_at_put(index, unicode[index]); 301 } 302 } 303 304 #ifdef ASSERT 305 { 306 ResourceMark rm; 307 size_t utf8_len = static_cast<size_t>(length); 308 char* expected = UNICODE::as_utf8(unicode, utf8_len); 309 char* actual = as_utf8_string(h_obj()); 310 if (strcmp(expected, actual) != 0) { 311 fatal("Unicode conversion failure: %s --> %s", expected, actual); 312 } 313 } 314 #endif 315 316 return h_obj; 317 } 318 319 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) { 320 Handle h_obj = create_from_unicode(unicode, length, CHECK_NULL); 321 return h_obj(); 322 } 323 324 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) { 325 if (utf8_str == nullptr) { 326 return Handle(); 327 } 328 bool has_multibyte, is_latin1; 329 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte); 330 if (!CompactStrings) { 331 has_multibyte = true; 332 is_latin1 = false; 333 } 334 335 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 336 if (length > 0) { 337 if (!has_multibyte) { 338 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str); 339 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length); 340 } else if (is_latin1) { 341 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 342 } else { 343 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 344 } 345 } 346 347 #ifdef ASSERT 348 // This check is too strict when the input string is not a valid UTF8. 349 // For example, it may be created with arbitrary content via jni_NewStringUTF. 350 if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, strlen(utf8_str), false)) { 351 ResourceMark rm; 352 const char* expected = utf8_str; 353 char* actual = as_utf8_string(h_obj()); 354 if (strcmp(expected, actual) != 0) { 355 fatal("String conversion failure: %s --> %s", expected, actual); 356 } 357 } 358 #endif 359 360 return h_obj; 361 } 362 363 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) { 364 Handle h_obj = create_from_str(utf8_str, CHECK_NULL); 365 return h_obj(); 366 } 367 368 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) { 369 const char* utf8_str = (char*)symbol->bytes(); 370 int utf8_len = symbol->utf8_length(); 371 372 bool has_multibyte, is_latin1; 373 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte); 374 if (!CompactStrings) { 375 has_multibyte = true; 376 is_latin1 = false; 377 } 378 379 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 380 if (length > 0) { 381 if (!has_multibyte) { 382 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str); 383 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length); 384 } else if (is_latin1) { 385 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 386 } else { 387 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 388 } 389 } 390 391 #ifdef ASSERT 392 { 393 ResourceMark rm; 394 const char* expected = symbol->as_utf8(); 395 char* actual = as_utf8_string(h_obj()); 396 if (strncmp(expected, actual, utf8_len) != 0) { 397 fatal("Symbol conversion failure: %s --> %s", expected, actual); 398 } 399 } 400 #endif 401 402 return h_obj; 403 } 404 405 // Converts a C string to a Java String based on current encoding 406 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) { 407 assert(str != nullptr, "bad arguments"); 408 409 typedef jstring (JNICALL *to_java_string_fn_t)(JNIEnv*, const char *); 410 static to_java_string_fn_t _to_java_string_fn = nullptr; 411 412 if (_to_java_string_fn == nullptr) { 413 void *lib_handle = os::native_java_library(); 414 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "JNU_NewStringPlatform")); 415 #if defined(_WIN32) && !defined(_WIN64) 416 if (_to_java_string_fn == nullptr) { 417 // On 32 bit Windows, also try __stdcall decorated name 418 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "_JNU_NewStringPlatform@8")); 419 } 420 #endif 421 if (_to_java_string_fn == nullptr) { 422 fatal("JNU_NewStringPlatform missing"); 423 } 424 } 425 426 jstring js = nullptr; 427 { 428 JavaThread* thread = THREAD; 429 HandleMark hm(thread); 430 ThreadToNativeFromVM ttn(thread); 431 js = (_to_java_string_fn)(thread->jni_environment(), str); 432 } 433 434 Handle native_platform_string(THREAD, JNIHandles::resolve(js)); 435 JNIHandles::destroy_local(js); // destroy local JNIHandle. 436 return native_platform_string; 437 } 438 439 // Converts a Java String to a native C string that can be used for 440 // native OS calls. 441 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) { 442 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*); 443 static to_platform_string_fn_t _to_platform_string_fn = nullptr; 444 445 if (_to_platform_string_fn == nullptr) { 446 void *lib_handle = os::native_java_library(); 447 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars")); 448 if (_to_platform_string_fn == nullptr) { 449 fatal("GetStringPlatformChars missing"); 450 } 451 } 452 453 char *native_platform_string; 454 jstring js; 455 { JavaThread* thread = THREAD; 456 js = (jstring) JNIHandles::make_local(thread, java_string()); 457 HandleMark hm(thread); 458 ThreadToNativeFromVM ttn(thread); 459 JNIEnv *env = thread->jni_environment(); 460 bool is_copy; 461 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy); 462 assert(is_copy == JNI_TRUE, "is_copy value changed"); 463 } 464 465 // Uses a store barrier and therefore needs to be in vm state 466 JNIHandles::destroy_local(js); 467 468 return native_platform_string; 469 } 470 471 Handle java_lang_String::externalize_classname(Symbol* java_name, TRAPS) { 472 ResourceMark rm(THREAD); 473 return create_from_str(java_name->as_klass_external_name(), THREAD); 474 } 475 476 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) { 477 jchar* result = as_unicode_string_or_null(java_string, length); 478 if (result == nullptr) { 479 THROW_MSG_NULL(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string"); 480 } 481 return result; 482 } 483 484 jchar* java_lang_String::as_unicode_string_or_null(oop java_string, int& length) { 485 typeArrayOop value = java_lang_String::value(java_string); 486 length = java_lang_String::length(java_string, value); 487 bool is_latin1 = java_lang_String::is_latin1(java_string); 488 489 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length); 490 if (result != nullptr) { 491 if (!is_latin1) { 492 for (int index = 0; index < length; index++) { 493 result[index] = value->char_at(index); 494 } 495 } else { 496 for (int index = 0; index < length; index++) { 497 result[index] = ((jchar) value->byte_at(index)) & 0xff; 498 } 499 } 500 } 501 return result; 502 } 503 504 inline unsigned int java_lang_String::hash_code_impl(oop java_string, bool update) { 505 // The hash and hashIsZero fields are subject to a benign data race, 506 // making it crucial to ensure that any observable result of the 507 // calculation in this method stays correct under any possible read of 508 // these fields. Necessary restrictions to allow this to be correct 509 // without explicit memory fences or similar concurrency primitives is 510 // that we can ever only write to one of these two fields for a given 511 // String instance, and that the computation is idempotent and derived 512 // from immutable state 513 assert(_initialized && (_hash_offset > 0) && (_hashIsZero_offset > 0), "Must be initialized"); 514 if (java_lang_String::hash_is_set(java_string)) { 515 return java_string->int_field(_hash_offset); 516 } 517 518 typeArrayOop value = java_lang_String::value(java_string); 519 int length = java_lang_String::length(java_string, value); 520 bool is_latin1 = java_lang_String::is_latin1(java_string); 521 522 unsigned int hash = 0; 523 if (length > 0) { 524 if (is_latin1) { 525 hash = java_lang_String::hash_code(value->byte_at_addr(0), length); 526 } else { 527 hash = java_lang_String::hash_code(value->char_at_addr(0), length); 528 } 529 } 530 531 if (update) { 532 if (hash != 0) { 533 java_string->int_field_put(_hash_offset, hash); 534 } else { 535 java_string->bool_field_put(_hashIsZero_offset, true); 536 } 537 } 538 return hash; 539 } 540 541 unsigned int java_lang_String::hash_code(oop java_string) { 542 return hash_code_impl(java_string, /*update=*/true); 543 } 544 545 unsigned int java_lang_String::hash_code_noupdate(oop java_string) { 546 return hash_code_impl(java_string, /*update=*/false); 547 } 548 549 550 char* java_lang_String::as_quoted_ascii(oop java_string) { 551 typeArrayOop value = java_lang_String::value(java_string); 552 int length = java_lang_String::length(java_string, value); 553 bool is_latin1 = java_lang_String::is_latin1(java_string); 554 555 if (length == 0) return nullptr; 556 557 char* result; 558 size_t result_length; 559 if (!is_latin1) { 560 jchar* base = value->char_at_addr(0); 561 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 562 result = NEW_RESOURCE_ARRAY(char, result_length); 563 UNICODE::as_quoted_ascii(base, length, result, result_length); 564 } else { 565 jbyte* base = value->byte_at_addr(0); 566 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 567 result = NEW_RESOURCE_ARRAY(char, result_length); 568 UNICODE::as_quoted_ascii(base, length, result, result_length); 569 } 570 assert(result_length >= (size_t)length + 1, "must not be shorter"); 571 assert(result_length == strlen(result) + 1, "must match"); 572 return result; 573 } 574 575 Symbol* java_lang_String::as_symbol(oop java_string) { 576 typeArrayOop value = java_lang_String::value(java_string); 577 int length = java_lang_String::length(java_string, value); 578 bool is_latin1 = java_lang_String::is_latin1(java_string); 579 if (!is_latin1) { 580 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0); 581 Symbol* sym = SymbolTable::new_symbol(base, length); 582 return sym; 583 } else { 584 ResourceMark rm; 585 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0); 586 size_t utf8_len = static_cast<size_t>(length); 587 const char* base = UNICODE::as_utf8(position, utf8_len); 588 Symbol* sym = SymbolTable::new_symbol(base, checked_cast<int>(utf8_len)); 589 return sym; 590 } 591 } 592 593 Symbol* java_lang_String::as_symbol_or_null(oop java_string) { 594 typeArrayOop value = java_lang_String::value(java_string); 595 int length = java_lang_String::length(java_string, value); 596 bool is_latin1 = java_lang_String::is_latin1(java_string); 597 if (!is_latin1) { 598 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0); 599 return SymbolTable::probe_unicode(base, length); 600 } else { 601 ResourceMark rm; 602 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0); 603 size_t utf8_len = static_cast<size_t>(length); 604 const char* base = UNICODE::as_utf8(position, utf8_len); 605 return SymbolTable::probe(base, checked_cast<int>(utf8_len)); 606 } 607 } 608 609 size_t java_lang_String::utf8_length(oop java_string, typeArrayOop value) { 610 assert(value_equals(value, java_lang_String::value(java_string)), 611 "value must be same as java_lang_String::value(java_string)"); 612 int length = java_lang_String::length(java_string, value); 613 if (length == 0) { 614 return 0; 615 } 616 if (!java_lang_String::is_latin1(java_string)) { 617 return UNICODE::utf8_length(value->char_at_addr(0), length); 618 } else { 619 return UNICODE::utf8_length(value->byte_at_addr(0), length); 620 } 621 } 622 623 size_t java_lang_String::utf8_length(oop java_string) { 624 typeArrayOop value = java_lang_String::value(java_string); 625 return utf8_length(java_string, value); 626 } 627 628 int java_lang_String::utf8_length_as_int(oop java_string) { 629 typeArrayOop value = java_lang_String::value(java_string); 630 return utf8_length_as_int(java_string, value); 631 } 632 633 int java_lang_String::utf8_length_as_int(oop java_string, typeArrayOop value) { 634 assert(value_equals(value, java_lang_String::value(java_string)), 635 "value must be same as java_lang_String::value(java_string)"); 636 int length = java_lang_String::length(java_string, value); 637 if (length == 0) { 638 return 0; 639 } 640 if (!java_lang_String::is_latin1(java_string)) { 641 return UNICODE::utf8_length_as_int(value->char_at_addr(0), length); 642 } else { 643 return UNICODE::utf8_length_as_int(value->byte_at_addr(0), length); 644 } 645 } 646 647 char* java_lang_String::as_utf8_string(oop java_string) { 648 size_t length; 649 return as_utf8_string(java_string, length); 650 } 651 652 char* java_lang_String::as_utf8_string(oop java_string, size_t& length) { 653 typeArrayOop value = java_lang_String::value(java_string); 654 // `length` is used as the incoming number of characters to 655 // convert, and then set as the number of bytes in the UTF8 sequence. 656 length = java_lang_String::length(java_string, value); 657 bool is_latin1 = java_lang_String::is_latin1(java_string); 658 if (!is_latin1) { 659 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0); 660 return UNICODE::as_utf8(position, length); 661 } else { 662 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0); 663 return UNICODE::as_utf8(position, length); 664 } 665 } 666 667 // Uses a provided buffer if it's sufficiently large, otherwise allocates 668 // a resource array to fit 669 char* java_lang_String::as_utf8_string_full(oop java_string, char* buf, size_t buflen, size_t& utf8_len) { 670 typeArrayOop value = java_lang_String::value(java_string); 671 int len = java_lang_String::length(java_string, value); 672 bool is_latin1 = java_lang_String::is_latin1(java_string); 673 if (!is_latin1) { 674 jchar *position = (len == 0) ? nullptr : value->char_at_addr(0); 675 utf8_len = UNICODE::utf8_length(position, len); 676 if (utf8_len >= buflen) { 677 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1); 678 } 679 return UNICODE::as_utf8(position, len, buf, utf8_len + 1); 680 } else { 681 jbyte *position = (len == 0) ? nullptr : value->byte_at_addr(0); 682 utf8_len = UNICODE::utf8_length(position, len); 683 if (utf8_len >= buflen) { 684 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1); 685 } 686 return UNICODE::as_utf8(position, len, buf, utf8_len + 1); 687 } 688 } 689 690 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, size_t buflen) { 691 assert(value_equals(value, java_lang_String::value(java_string)), 692 "value must be same as java_lang_String::value(java_string)"); 693 int length = java_lang_String::length(java_string, value); 694 bool is_latin1 = java_lang_String::is_latin1(java_string); 695 if (!is_latin1) { 696 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0); 697 return UNICODE::as_utf8(position, length, buf, buflen); 698 } else { 699 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0); 700 return UNICODE::as_utf8(position, length, buf, buflen); 701 } 702 } 703 704 char* java_lang_String::as_utf8_string(oop java_string, char* buf, size_t buflen) { 705 typeArrayOop value = java_lang_String::value(java_string); 706 return as_utf8_string(java_string, value, buf, buflen); 707 } 708 709 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) { 710 // `length` is used as the incoming number of characters to 711 // convert, and then set as the number of bytes in the UTF8 sequence. 712 size_t length = static_cast<size_t>(len); 713 typeArrayOop value = java_lang_String::value(java_string); 714 bool is_latin1 = java_lang_String::is_latin1(java_string); 715 assert(start + len <= java_lang_String::length(java_string), "just checking"); 716 if (!is_latin1) { 717 jchar* position = value->char_at_addr(start); 718 return UNICODE::as_utf8(position, length); 719 } else { 720 jbyte* position = value->byte_at_addr(start); 721 return UNICODE::as_utf8(position, length); 722 } 723 } 724 725 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, size_t buflen) { 726 assert(value_equals(value, java_lang_String::value(java_string)), 727 "value must be same as java_lang_String::value(java_string)"); 728 assert(start + len <= java_lang_String::length(java_string), "just checking"); 729 bool is_latin1 = java_lang_String::is_latin1(java_string); 730 if (!is_latin1) { 731 jchar* position = value->char_at_addr(start); 732 return UNICODE::as_utf8(position, len, buf, buflen); 733 } else { 734 jbyte* position = value->byte_at_addr(start); 735 return UNICODE::as_utf8(position, len, buf, buflen); 736 } 737 } 738 739 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) { 740 assert(java_string->klass() == vmClasses::String_klass(), 741 "must be java_string"); 742 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 743 int length = java_lang_String::length(java_string, value); 744 if (length != len) { 745 return false; 746 } 747 bool is_latin1 = java_lang_String::is_latin1(java_string); 748 if (!is_latin1) { 749 for (int i = 0; i < len; i++) { 750 if (value->char_at(i) != chars[i]) { 751 return false; 752 } 753 } 754 } else { 755 for (int i = 0; i < len; i++) { 756 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) { 757 return false; 758 } 759 } 760 } 761 return true; 762 } 763 764 bool java_lang_String::equals(oop str1, oop str2) { 765 assert(str1->klass() == vmClasses::String_klass(), 766 "must be java String"); 767 assert(str2->klass() == vmClasses::String_klass(), 768 "must be java String"); 769 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1); 770 bool is_latin1 = java_lang_String::is_latin1(str1); 771 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2); 772 bool is_latin2 = java_lang_String::is_latin1(str2); 773 774 if (is_latin1 != is_latin2) { 775 // Strings with different coders are never equal. 776 return false; 777 } 778 return value_equals(value1, value2); 779 } 780 781 // Print the given string to the given outputStream, limiting the output to 782 // at most max_length of the string's characters. If the length exceeds the 783 // limit we print an abridged version of the string with the "middle" elided 784 // and replaced by " ... (N characters ommitted) ... ". If max_length is odd 785 // it is treated as max_length-1. 786 void java_lang_String::print(oop java_string, outputStream* st, int max_length) { 787 assert(java_string->klass() == vmClasses::String_klass(), "must be java_string"); 788 // We need at least two characters to print A ... B 789 assert(max_length > 1, "invalid max_length: %d", max_length); 790 791 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 792 793 if (value == nullptr) { 794 // This can happen if, e.g., printing a String 795 // object before its initializer has been called 796 st->print("nullptr"); 797 return; 798 } 799 800 int length = java_lang_String::length(java_string, value); 801 bool is_latin1 = java_lang_String::is_latin1(java_string); 802 803 bool abridge = length > max_length; 804 805 st->print("\""); 806 for (int index = 0; index < length; index++) { 807 // If we need to abridge and we've printed half the allowed characters 808 // then jump to the tail of the string. 809 if (abridge && index >= max_length / 2) { 810 st->print(" ... (%d characters ommitted) ... ", length - 2 * (max_length / 2)); 811 index = length - (max_length / 2); 812 abridge = false; // only do this once 813 } 814 jchar c = (!is_latin1) ? value->char_at(index) : 815 ((jchar) value->byte_at(index)) & 0xff; 816 if (c < ' ') { 817 st->print("\\x%02X", c); // print control characters e.g. \x0A 818 } else { 819 st->print("%c", c); 820 } 821 } 822 st->print("\""); 823 824 if (length > max_length) { 825 st->print(" (abridged) "); 826 } 827 } 828 829 // java_lang_Class 830 831 int java_lang_Class::_klass_offset; 832 int java_lang_Class::_array_klass_offset; 833 int java_lang_Class::_oop_size_offset; 834 int java_lang_Class::_static_oop_field_count_offset; 835 int java_lang_Class::_class_loader_offset; 836 int java_lang_Class::_module_offset; 837 int java_lang_Class::_protection_domain_offset; 838 int java_lang_Class::_component_mirror_offset; 839 int java_lang_Class::_init_lock_offset; 840 int java_lang_Class::_signers_offset; 841 int java_lang_Class::_name_offset; 842 int java_lang_Class::_source_file_offset; 843 int java_lang_Class::_classData_offset; 844 int java_lang_Class::_classRedefinedCount_offset; 845 846 bool java_lang_Class::_offsets_computed = false; 847 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = nullptr; 848 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = nullptr; 849 850 #ifdef ASSERT 851 inline static void assert_valid_static_string_field(fieldDescriptor* fd) { 852 assert(fd->has_initial_value(), "caller should have checked this"); 853 assert(fd->field_type() == T_OBJECT, "caller should have checked this"); 854 assert(fd->signature() == vmSymbols::string_signature(), "just checking"); 855 } 856 #endif 857 858 static void initialize_static_string_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 859 DEBUG_ONLY(assert_valid_static_string_field(fd);) 860 oop string = fd->string_initial_value(CHECK); 861 mirror()->obj_field_put(fd->offset(), string); 862 } 863 864 static void initialize_static_primitive_field(fieldDescriptor* fd, Handle mirror) { 865 assert(fd->has_initial_value(), "caller should have checked this"); 866 BasicType t = fd->field_type(); 867 switch (t) { 868 case T_BYTE: 869 mirror()->byte_field_put(fd->offset(), (jbyte)(fd->int_initial_value())); 870 break; 871 case T_BOOLEAN: 872 mirror()->bool_field_put(fd->offset(), (jboolean)(fd->int_initial_value())); 873 break; 874 case T_CHAR: 875 mirror()->char_field_put(fd->offset(), (jchar)(fd->int_initial_value())); 876 break; 877 case T_SHORT: 878 mirror()->short_field_put(fd->offset(), (jshort)(fd->int_initial_value())); 879 break; 880 case T_INT: 881 mirror()->int_field_put(fd->offset(), fd->int_initial_value()); 882 break; 883 case T_FLOAT: 884 mirror()->float_field_put(fd->offset(), fd->float_initial_value()); 885 break; 886 case T_DOUBLE: 887 mirror()->double_field_put(fd->offset(), fd->double_initial_value()); 888 break; 889 case T_LONG: 890 mirror()->long_field_put(fd->offset(), fd->long_initial_value()); 891 break; 892 default: 893 // Illegal ConstantValue attribute in class file should have been 894 // caught during classfile parsing. 895 ShouldNotReachHere(); 896 } 897 } 898 899 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 900 assert(mirror.not_null() && fd->is_static(), "just checking"); 901 if (fd->has_initial_value()) { 902 if (fd->field_type() != T_OBJECT) { 903 initialize_static_primitive_field(fd, mirror); 904 } else { 905 initialize_static_string_field(fd, mirror, CHECK); 906 } 907 } 908 } 909 910 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) { 911 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already"); 912 913 // If the offset was read from the shared archive, it was fixed up already 914 if (!k->is_shared()) { 915 if (k->is_instance_klass()) { 916 // During bootstrap, java.lang.Class wasn't loaded so static field 917 // offsets were computed without the size added it. Go back and 918 // update all the static field offsets to included the size. 919 920 // Unfortunately, the FieldInfo stream is encoded with UNSIGNED5 which doesn't allow 921 // content updates. So the FieldInfo stream has to be decompressed into a temporary array, 922 // static fields offsets are updated in this array before reencoding everything into 923 // a new UNSIGNED5 stream, and substitute it to the old FieldInfo stream. 924 925 int java_fields; 926 int injected_fields; 927 InstanceKlass* ik = InstanceKlass::cast(k); 928 GrowableArray<FieldInfo>* fields = 929 FieldInfoStream::create_FieldInfoArray(ik->fieldinfo_stream(), 930 &java_fields, &injected_fields); 931 for (int i = 0; i < fields->length(); i++) { 932 FieldInfo* fi = fields->adr_at(i); 933 if (fi->access_flags().is_static()) { 934 fi->set_offset(fi->offset() + InstanceMirrorKlass::offset_of_static_fields()); 935 } 936 } 937 Array<u1>* old_stream = ik->fieldinfo_stream(); 938 assert(fields->length() == (java_fields + injected_fields), "Must be"); 939 Array<u1>* new_fis = FieldInfoStream::create_FieldInfoStream(fields, java_fields, injected_fields, k->class_loader_data(), CHECK); 940 ik->set_fieldinfo_stream(new_fis); 941 MetadataFactory::free_array<u1>(k->class_loader_data(), old_stream); 942 } 943 } 944 945 if (k->is_shared() && k->has_archived_mirror_index()) { 946 if (ArchiveHeapLoader::is_in_use()) { 947 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK); 948 assert(present, "Missing archived mirror for %s", k->external_name()); 949 return; 950 } else { 951 k->clear_java_mirror_handle(); 952 k->clear_archived_mirror_index(); 953 } 954 } 955 create_mirror(k, Handle(), Handle(), Handle(), Handle(), CHECK); 956 } 957 958 void java_lang_Class::initialize_mirror_fields(Klass* k, 959 Handle mirror, 960 Handle protection_domain, 961 Handle classData, 962 TRAPS) { 963 // Allocate a simple java object for a lock. 964 // This needs to be a java object because during class initialization 965 // it can be held across a java call. 966 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK); 967 set_init_lock(mirror(), r); 968 969 // Set protection domain also 970 set_protection_domain(mirror(), protection_domain()); 971 972 // Initialize static fields 973 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK); 974 975 // Set classData 976 set_class_data(mirror(), classData()); 977 } 978 979 // Set the java.lang.Module module field in the java_lang_Class mirror 980 void java_lang_Class::set_mirror_module_field(JavaThread* current, Klass* k, Handle mirror, Handle module) { 981 if (module.is_null()) { 982 // During startup, the module may be null only if java.base has not been defined yet. 983 // Put the class on the fixup_module_list to patch later when the java.lang.Module 984 // for java.base is known. But note that since we captured the null module another 985 // thread may have completed that initialization. 986 987 bool javabase_was_defined = false; 988 { 989 MutexLocker m1(current, Module_lock); 990 // Keep list of classes needing java.base module fixup 991 if (!ModuleEntryTable::javabase_defined()) { 992 assert(k->java_mirror() != nullptr, "Class's mirror is null"); 993 k->class_loader_data()->inc_keep_alive_ref_count(); 994 assert(fixup_module_field_list() != nullptr, "fixup_module_field_list not initialized"); 995 fixup_module_field_list()->push(k); 996 } else { 997 javabase_was_defined = true; 998 } 999 } 1000 1001 // If java.base was already defined then patch this particular class with java.base. 1002 if (javabase_was_defined) { 1003 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry(); 1004 assert(javabase_entry != nullptr && javabase_entry->module() != nullptr, 1005 "Setting class module field, " JAVA_BASE_NAME " should be defined"); 1006 Handle javabase_handle(current, javabase_entry->module()); 1007 set_module(mirror(), javabase_handle()); 1008 } 1009 } else { 1010 assert(Universe::is_module_initialized() || 1011 (ModuleEntryTable::javabase_defined() && 1012 (module() == ModuleEntryTable::javabase_moduleEntry()->module())), 1013 "Incorrect java.lang.Module specification while creating mirror"); 1014 set_module(mirror(), module()); 1015 } 1016 } 1017 1018 // Statically allocate fixup lists because they always get created. 1019 void java_lang_Class::allocate_fixup_lists() { 1020 GrowableArray<Klass*>* mirror_list = 1021 new (mtClass) GrowableArray<Klass*>(40, mtClass); 1022 set_fixup_mirror_list(mirror_list); 1023 1024 GrowableArray<Klass*>* module_list = 1025 new (mtModule) GrowableArray<Klass*>(500, mtModule); 1026 set_fixup_module_field_list(module_list); 1027 } 1028 1029 void java_lang_Class::allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData, 1030 Handle& mirror, Handle& comp_mirror, TRAPS) { 1031 // Allocate mirror (java.lang.Class instance) 1032 oop mirror_oop = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(k, CHECK); 1033 mirror = Handle(THREAD, mirror_oop); 1034 1035 // Setup indirection from mirror->klass 1036 set_klass(mirror(), k); 1037 1038 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass()); 1039 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set"); 1040 1041 set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror())); 1042 1043 // It might also have a component mirror. This mirror must already exist. 1044 if (k->is_array_klass()) { 1045 if (k->is_typeArray_klass()) { 1046 BasicType type = TypeArrayKlass::cast(k)->element_type(); 1047 if (is_scratch) { 1048 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(type)); 1049 } else { 1050 comp_mirror = Handle(THREAD, Universe::java_mirror(type)); 1051 } 1052 } else { 1053 assert(k->is_objArray_klass(), "Must be"); 1054 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass(); 1055 assert(element_klass != nullptr, "Must have an element klass"); 1056 if (is_scratch) { 1057 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass)); 1058 } else { 1059 comp_mirror = Handle(THREAD, element_klass->java_mirror()); 1060 } 1061 } 1062 assert(comp_mirror() != nullptr, "must have a mirror"); 1063 1064 // Two-way link between the array klass and its component mirror: 1065 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k 1066 set_component_mirror(mirror(), comp_mirror()); 1067 // See below for ordering dependencies between field array_klass in component mirror 1068 // and java_mirror in this klass. 1069 } else { 1070 assert(k->is_instance_klass(), "Must be"); 1071 1072 initialize_mirror_fields(k, mirror, protection_domain, classData, THREAD); 1073 if (HAS_PENDING_EXCEPTION) { 1074 // If any of the fields throws an exception like OOM remove the klass field 1075 // from the mirror so GC doesn't follow it after the klass has been deallocated. 1076 // This mirror looks like a primitive type, which logically it is because it 1077 // it represents no class. 1078 set_klass(mirror(), nullptr); 1079 return; 1080 } 1081 } 1082 } 1083 1084 void java_lang_Class::create_mirror(Klass* k, Handle class_loader, 1085 Handle module, Handle protection_domain, 1086 Handle classData, TRAPS) { 1087 assert(k != nullptr, "Use create_basic_type_mirror for primitive types"); 1088 assert(k->java_mirror() == nullptr, "should only assign mirror once"); 1089 1090 // Use this moment of initialization to cache modifier_flags also, 1091 // to support Class.getModifiers(). Instance classes recalculate 1092 // the cached flags after the class file is parsed, but before the 1093 // class is put into the system dictionary. 1094 int computed_modifiers = k->compute_modifier_flags(); 1095 k->set_modifier_flags(computed_modifiers); 1096 // Class_klass has to be loaded because it is used to allocate 1097 // the mirror. 1098 if (vmClasses::Class_klass_loaded()) { 1099 Handle mirror; 1100 Handle comp_mirror; 1101 1102 allocate_mirror(k, /*is_scratch=*/false, protection_domain, classData, mirror, comp_mirror, CHECK); 1103 1104 // set the classLoader field in the java_lang_Class instance 1105 assert(class_loader() == k->class_loader(), "should be same"); 1106 set_class_loader(mirror(), class_loader()); 1107 1108 // Setup indirection from klass->mirror 1109 // after any exceptions can happen during allocations. 1110 k->set_java_mirror(mirror); 1111 1112 // Set the module field in the java_lang_Class instance. This must be done 1113 // after the mirror is set. 1114 set_mirror_module_field(THREAD, k, mirror, module); 1115 1116 if (comp_mirror() != nullptr) { 1117 // Set after k->java_mirror() is published, because compiled code running 1118 // concurrently doesn't expect a k to have a null java_mirror. 1119 release_set_array_klass(comp_mirror(), k); 1120 } 1121 if (CDSConfig::is_dumping_heap()) { 1122 create_scratch_mirror(k, CHECK); 1123 } 1124 } else { 1125 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized"); 1126 fixup_mirror_list()->push(k); 1127 } 1128 } 1129 1130 #if INCLUDE_CDS_JAVA_HEAP 1131 // The "scratch mirror" stores the states of the mirror object that can be 1132 // decided at dump time (such as the initial values of the static fields, the 1133 // component mirror, etc). At runtime, more information is added to it by 1134 // java_lang_Class::restore_archived_mirror(). 1135 // 1136 // Essentially, /*dumptime*/create_scratch_mirror() + /*runtime*/restore_archived_mirror() 1137 // produces the same result as /*runtime*/create_mirror(). 1138 // 1139 // Note: we archive the "scratch mirror" instead of k->java_mirror(), because the 1140 // latter may contain dumptime-specific information that cannot be archived 1141 // (e.g., ClassLoaderData*, or static fields that are modified by Java code execution). 1142 void java_lang_Class::create_scratch_mirror(Klass* k, TRAPS) { 1143 if (k->class_loader() != nullptr && 1144 k->class_loader() != SystemDictionary::java_platform_loader() && 1145 k->class_loader() != SystemDictionary::java_system_loader()) { 1146 // We only archive the mirrors of classes loaded by the built-in loaders 1147 return; 1148 } 1149 1150 Handle protection_domain, classData; // set to null. Will be reinitialized at runtime 1151 Handle mirror; 1152 Handle comp_mirror; 1153 allocate_mirror(k, /*is_scratch=*/true, protection_domain, classData, mirror, comp_mirror, CHECK); 1154 1155 if (comp_mirror() != nullptr) { 1156 release_set_array_klass(comp_mirror(), k); 1157 } 1158 1159 HeapShared::set_scratch_java_mirror(k, mirror()); 1160 } 1161 1162 // Returns true if the mirror is updated, false if no archived mirror 1163 // data is present. After the archived mirror object is restored, the 1164 // shared klass' _has_raw_archived_mirror flag is cleared. 1165 bool java_lang_Class::restore_archived_mirror(Klass *k, 1166 Handle class_loader, Handle module, 1167 Handle protection_domain, TRAPS) { 1168 // Postpone restoring archived mirror until java.lang.Class is loaded. Please 1169 // see more details in vmClasses::resolve_all(). 1170 if (!vmClasses::Class_klass_loaded()) { 1171 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized"); 1172 fixup_mirror_list()->push(k); 1173 return true; 1174 } 1175 1176 oop m = k->archived_java_mirror(); 1177 assert(m != nullptr, "must have stored non-null archived mirror"); 1178 1179 // Sanity: clear it now to prevent re-initialization if any of the following fails 1180 k->clear_archived_mirror_index(); 1181 1182 // mirror is archived, restore 1183 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m)); 1184 assert(as_Klass(m) == k, "must be"); 1185 Handle mirror(THREAD, m); 1186 1187 if (!k->is_array_klass()) { 1188 // - local static final fields with initial values were initialized at dump time 1189 1190 // create the init_lock 1191 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false)); 1192 set_init_lock(mirror(), r); 1193 1194 if (protection_domain.not_null()) { 1195 set_protection_domain(mirror(), protection_domain()); 1196 } 1197 } 1198 1199 assert(class_loader() == k->class_loader(), "should be same"); 1200 if (class_loader.not_null()) { 1201 set_class_loader(mirror(), class_loader()); 1202 } 1203 1204 k->set_java_mirror(mirror); 1205 1206 set_mirror_module_field(THREAD, k, mirror, module); 1207 1208 if (log_is_enabled(Trace, cds, heap, mirror)) { 1209 ResourceMark rm(THREAD); 1210 log_trace(cds, heap, mirror)( 1211 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror())); 1212 } 1213 1214 return true; 1215 } 1216 #endif // INCLUDE_CDS_JAVA_HEAP 1217 1218 void java_lang_Class::fixup_module_field(Klass* k, Handle module) { 1219 assert(_module_offset != 0, "must have been computed already"); 1220 set_module(k->java_mirror(), module()); 1221 } 1222 1223 void java_lang_Class::set_oop_size(HeapWord* java_class, size_t size) { 1224 assert(_oop_size_offset != 0, "must be set"); 1225 assert(size > 0, "Oop size must be greater than zero, not " SIZE_FORMAT, size); 1226 assert(size <= INT_MAX, "Lossy conversion: " SIZE_FORMAT, size); 1227 *(int*)(((char*)java_class) + _oop_size_offset) = (int)size; 1228 } 1229 1230 int java_lang_Class::static_oop_field_count(oop java_class) { 1231 assert(_static_oop_field_count_offset != 0, "must be set"); 1232 return java_class->int_field(_static_oop_field_count_offset); 1233 } 1234 1235 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) { 1236 assert(_static_oop_field_count_offset != 0, "must be set"); 1237 java_class->int_field_put(_static_oop_field_count_offset, size); 1238 } 1239 1240 oop java_lang_Class::protection_domain(oop java_class) { 1241 assert(_protection_domain_offset != 0, "must be set"); 1242 return java_class->obj_field(_protection_domain_offset); 1243 } 1244 void java_lang_Class::set_protection_domain(oop java_class, oop pd) { 1245 assert(_protection_domain_offset != 0, "must be set"); 1246 java_class->obj_field_put(_protection_domain_offset, pd); 1247 } 1248 1249 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) { 1250 assert(_component_mirror_offset != 0, "must be set"); 1251 java_class->obj_field_put(_component_mirror_offset, comp_mirror); 1252 } 1253 oop java_lang_Class::component_mirror(oop java_class) { 1254 assert(_component_mirror_offset != 0, "must be set"); 1255 return java_class->obj_field(_component_mirror_offset); 1256 } 1257 1258 oop java_lang_Class::init_lock(oop java_class) { 1259 assert(_init_lock_offset != 0, "must be set"); 1260 return java_class->obj_field(_init_lock_offset); 1261 } 1262 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) { 1263 assert(_init_lock_offset != 0, "must be set"); 1264 java_class->obj_field_put(_init_lock_offset, init_lock); 1265 } 1266 1267 objArrayOop java_lang_Class::signers(oop java_class) { 1268 assert(_signers_offset != 0, "must be set"); 1269 return (objArrayOop)java_class->obj_field(_signers_offset); 1270 } 1271 1272 oop java_lang_Class::class_data(oop java_class) { 1273 assert(_classData_offset != 0, "must be set"); 1274 return java_class->obj_field(_classData_offset); 1275 } 1276 void java_lang_Class::set_class_data(oop java_class, oop class_data) { 1277 assert(_classData_offset != 0, "must be set"); 1278 java_class->obj_field_put(_classData_offset, class_data); 1279 } 1280 1281 void java_lang_Class::set_class_loader(oop java_class, oop loader) { 1282 assert(_class_loader_offset != 0, "offsets should have been initialized"); 1283 java_class->obj_field_put(_class_loader_offset, loader); 1284 } 1285 1286 oop java_lang_Class::class_loader(oop java_class) { 1287 assert(_class_loader_offset != 0, "must be set"); 1288 return java_class->obj_field(_class_loader_offset); 1289 } 1290 1291 oop java_lang_Class::module(oop java_class) { 1292 assert(_module_offset != 0, "must be set"); 1293 return java_class->obj_field(_module_offset); 1294 } 1295 1296 void java_lang_Class::set_module(oop java_class, oop module) { 1297 assert(_module_offset != 0, "must be set"); 1298 java_class->obj_field_put(_module_offset, module); 1299 } 1300 1301 oop java_lang_Class::name(Handle java_class, TRAPS) { 1302 assert(_name_offset != 0, "must be set"); 1303 oop o = java_class->obj_field(_name_offset); 1304 if (o == nullptr) { 1305 o = StringTable::intern(as_external_name(java_class()), THREAD); 1306 java_class->obj_field_put(_name_offset, o); 1307 } 1308 return o; 1309 } 1310 1311 oop java_lang_Class::source_file(oop java_class) { 1312 assert(_source_file_offset != 0, "must be set"); 1313 return java_class->obj_field(_source_file_offset); 1314 } 1315 1316 void java_lang_Class::set_source_file(oop java_class, oop source_file) { 1317 assert(_source_file_offset != 0, "must be set"); 1318 java_class->obj_field_put(_source_file_offset, source_file); 1319 } 1320 1321 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) { 1322 // This should be improved by adding a field at the Java level or by 1323 // introducing a new VM klass (see comment in ClassFileParser) 1324 oop java_class = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(nullptr, CHECK_NULL); 1325 if (type != T_VOID) { 1326 Klass* aklass = Universe::typeArrayKlass(type); 1327 assert(aklass != nullptr, "correct bootstrap"); 1328 release_set_array_klass(java_class, aklass); 1329 } 1330 #ifdef ASSERT 1331 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(vmClasses::Class_klass()); 1332 assert(static_oop_field_count(java_class) == 0, "should have been zeroed by allocation"); 1333 #endif 1334 return java_class; 1335 } 1336 1337 void java_lang_Class::set_klass(oop java_class, Klass* klass) { 1338 assert(is_instance(java_class), "must be a Class object"); 1339 java_class->metadata_field_put(_klass_offset, klass); 1340 } 1341 1342 1343 void java_lang_Class::print_signature(oop java_class, outputStream* st) { 1344 assert(is_instance(java_class), "must be a Class object"); 1345 Symbol* name = nullptr; 1346 bool is_instance = false; 1347 if (is_primitive(java_class)) { 1348 name = vmSymbols::type_signature(primitive_type(java_class)); 1349 } else { 1350 Klass* k = as_Klass(java_class); 1351 is_instance = k->is_instance_klass(); 1352 name = k->name(); 1353 } 1354 if (name == nullptr) { 1355 st->print("<null>"); 1356 return; 1357 } 1358 if (is_instance) st->print("L"); 1359 st->write((char*) name->base(), (int) name->utf8_length()); 1360 if (is_instance) st->print(";"); 1361 } 1362 1363 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) { 1364 assert(is_instance(java_class), "must be a Class object"); 1365 Symbol* name; 1366 if (is_primitive(java_class)) { 1367 name = vmSymbols::type_signature(primitive_type(java_class)); 1368 // Because this can create a new symbol, the caller has to decrement 1369 // the refcount, so make adjustment here and below for symbols returned 1370 // that are not created or incremented due to a successful lookup. 1371 name->increment_refcount(); 1372 } else { 1373 Klass* k = as_Klass(java_class); 1374 if (!k->is_instance_klass()) { 1375 name = k->name(); 1376 name->increment_refcount(); 1377 } else { 1378 ResourceMark rm; 1379 const char* sigstr = k->signature_name(); 1380 int siglen = (int) strlen(sigstr); 1381 if (!intern_if_not_found) { 1382 name = SymbolTable::probe(sigstr, siglen); 1383 } else { 1384 name = SymbolTable::new_symbol(sigstr, siglen); 1385 } 1386 } 1387 } 1388 return name; 1389 } 1390 1391 // Returns the Java name for this Java mirror (Resource allocated) 1392 // See Klass::external_name(). 1393 // For primitive type Java mirrors, its type name is returned. 1394 const char* java_lang_Class::as_external_name(oop java_class) { 1395 assert(is_instance(java_class), "must be a Class object"); 1396 const char* name = nullptr; 1397 if (is_primitive(java_class)) { 1398 name = type2name(primitive_type(java_class)); 1399 } else { 1400 name = as_Klass(java_class)->external_name(); 1401 } 1402 if (name == nullptr) { 1403 name = "<null>"; 1404 } 1405 return name; 1406 } 1407 1408 Klass* java_lang_Class::array_klass_acquire(oop java_class) { 1409 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset)); 1410 assert(k == nullptr || (k->is_klass() && k->is_array_klass()), "should be array klass"); 1411 return k; 1412 } 1413 1414 1415 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) { 1416 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass"); 1417 java_class->release_metadata_field_put(_array_klass_offset, klass); 1418 } 1419 1420 1421 BasicType java_lang_Class::primitive_type(oop java_class) { 1422 assert(is_primitive(java_class), "just checking"); 1423 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1424 BasicType type = T_VOID; 1425 if (ak != nullptr) { 1426 // Note: create_basic_type_mirror above initializes ak to a non-null value. 1427 type = ArrayKlass::cast(ak)->element_type(); 1428 } else { 1429 assert(java_class == Universe::void_mirror(), "only valid non-array primitive"); 1430 } 1431 #ifdef ASSERT 1432 if (CDSConfig::is_dumping_heap()) { 1433 oop mirror = Universe::java_mirror(type); 1434 oop scratch_mirror = HeapShared::scratch_java_mirror(type); 1435 assert(java_class == mirror || java_class == scratch_mirror, "must be consistent"); 1436 } else { 1437 assert(Universe::java_mirror(type) == java_class, "must be consistent"); 1438 } 1439 #endif 1440 return type; 1441 } 1442 1443 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) { 1444 assert(is_instance(java_class), "must be a Class object"); 1445 if (is_primitive(java_class)) { 1446 if (reference_klass != nullptr) 1447 (*reference_klass) = nullptr; 1448 return primitive_type(java_class); 1449 } else { 1450 if (reference_klass != nullptr) 1451 (*reference_klass) = as_Klass(java_class); 1452 return T_OBJECT; 1453 } 1454 } 1455 1456 1457 oop java_lang_Class::primitive_mirror(BasicType t) { 1458 oop mirror = Universe::java_mirror(t); 1459 assert(mirror != nullptr && mirror->is_a(vmClasses::Class_klass()), "must be a Class"); 1460 assert(is_primitive(mirror), "must be primitive"); 1461 return mirror; 1462 } 1463 1464 #define CLASS_FIELDS_DO(macro) \ 1465 macro(_classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false); \ 1466 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \ 1467 macro(_component_mirror_offset, k, "componentType", class_signature, false); \ 1468 macro(_module_offset, k, "module", module_signature, false); \ 1469 macro(_name_offset, k, "name", string_signature, false); \ 1470 macro(_classData_offset, k, "classData", object_signature, false); \ 1471 macro(_signers_offset, k, "signers", object_array_signature, false); 1472 1473 void java_lang_Class::compute_offsets() { 1474 if (_offsets_computed) { 1475 return; 1476 } 1477 1478 _offsets_computed = true; 1479 1480 InstanceKlass* k = vmClasses::Class_klass(); 1481 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1482 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 1483 } 1484 1485 #if INCLUDE_CDS 1486 void java_lang_Class::serialize_offsets(SerializeClosure* f) { 1487 f->do_bool(&_offsets_computed); 1488 1489 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1490 1491 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 1492 } 1493 #endif 1494 1495 int java_lang_Class::classRedefinedCount(oop the_class_mirror) { 1496 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized"); 1497 return the_class_mirror->int_field(_classRedefinedCount_offset); 1498 } 1499 1500 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) { 1501 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized"); 1502 the_class_mirror->int_field_put(_classRedefinedCount_offset, value); 1503 } 1504 1505 1506 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the 1507 // platform thread structure, and a eetop offset which was used for thread 1508 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures 1509 // merged, so in the HotSpot VM we just use the eetop field for the thread 1510 // instead of the privateInfo_offset. 1511 // 1512 // Note: The stackSize field is only present starting in 1.4. 1513 1514 int java_lang_Thread_FieldHolder::_group_offset; 1515 int java_lang_Thread_FieldHolder::_priority_offset; 1516 int java_lang_Thread_FieldHolder::_stackSize_offset; 1517 int java_lang_Thread_FieldHolder::_daemon_offset; 1518 int java_lang_Thread_FieldHolder::_thread_status_offset; 1519 1520 #define THREAD_FIELD_HOLDER_FIELDS_DO(macro) \ 1521 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \ 1522 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \ 1523 macro(_stackSize_offset, k, "stackSize", long_signature, false); \ 1524 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \ 1525 macro(_thread_status_offset, k, "threadStatus", int_signature, false) 1526 1527 void java_lang_Thread_FieldHolder::compute_offsets() { 1528 assert(_group_offset == 0, "offsets should be initialized only once"); 1529 1530 InstanceKlass* k = vmClasses::Thread_FieldHolder_klass(); 1531 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1532 } 1533 1534 #if INCLUDE_CDS 1535 void java_lang_Thread_FieldHolder::serialize_offsets(SerializeClosure* f) { 1536 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1537 } 1538 #endif 1539 1540 oop java_lang_Thread_FieldHolder::threadGroup(oop holder) { 1541 return holder->obj_field(_group_offset); 1542 } 1543 1544 ThreadPriority java_lang_Thread_FieldHolder::priority(oop holder) { 1545 return (ThreadPriority)holder->int_field(_priority_offset); 1546 } 1547 1548 void java_lang_Thread_FieldHolder::set_priority(oop holder, ThreadPriority priority) { 1549 holder->int_field_put(_priority_offset, priority); 1550 } 1551 1552 jlong java_lang_Thread_FieldHolder::stackSize(oop holder) { 1553 return holder->long_field(_stackSize_offset); 1554 } 1555 1556 bool java_lang_Thread_FieldHolder::is_daemon(oop holder) { 1557 return holder->bool_field(_daemon_offset) != 0; 1558 } 1559 1560 void java_lang_Thread_FieldHolder::set_daemon(oop holder, bool val) { 1561 assert(val, "daemon status is never turned off"); 1562 holder->bool_field_put(_daemon_offset, val); 1563 } 1564 1565 void java_lang_Thread_FieldHolder::set_thread_status(oop holder, JavaThreadStatus status) { 1566 holder->int_field_put(_thread_status_offset, static_cast<int>(status)); 1567 } 1568 1569 JavaThreadStatus java_lang_Thread_FieldHolder::get_thread_status(oop holder) { 1570 return static_cast<JavaThreadStatus>(holder->int_field(_thread_status_offset)); 1571 } 1572 1573 1574 int java_lang_Thread_Constants::_static_VTHREAD_GROUP_offset = 0; 1575 1576 #define THREAD_CONSTANTS_STATIC_FIELDS_DO(macro) \ 1577 macro(_static_VTHREAD_GROUP_offset, k, "VTHREAD_GROUP", threadgroup_signature, true); 1578 1579 void java_lang_Thread_Constants::compute_offsets() { 1580 assert(_static_VTHREAD_GROUP_offset == 0, "offsets should be initialized only once"); 1581 1582 InstanceKlass* k = vmClasses::Thread_Constants_klass(); 1583 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1584 } 1585 1586 #if INCLUDE_CDS 1587 void java_lang_Thread_Constants::serialize_offsets(SerializeClosure* f) { 1588 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1589 } 1590 #endif 1591 1592 oop java_lang_Thread_Constants::get_VTHREAD_GROUP() { 1593 InstanceKlass* k = vmClasses::Thread_Constants_klass(); 1594 oop base = k->static_field_base_raw(); 1595 return base->obj_field(_static_VTHREAD_GROUP_offset); 1596 } 1597 1598 1599 int java_lang_Thread::_holder_offset; 1600 int java_lang_Thread::_name_offset; 1601 int java_lang_Thread::_contextClassLoader_offset; 1602 int java_lang_Thread::_inheritedAccessControlContext_offset; 1603 int java_lang_Thread::_eetop_offset; 1604 int java_lang_Thread::_jvmti_thread_state_offset; 1605 int java_lang_Thread::_jvmti_VTMS_transition_disable_count_offset; 1606 int java_lang_Thread::_jvmti_is_in_VTMS_transition_offset; 1607 int java_lang_Thread::_interrupted_offset; 1608 int java_lang_Thread::_interruptLock_offset; 1609 int java_lang_Thread::_tid_offset; 1610 int java_lang_Thread::_continuation_offset; 1611 int java_lang_Thread::_park_blocker_offset; 1612 int java_lang_Thread::_scopedValueBindings_offset; 1613 JFR_ONLY(int java_lang_Thread::_jfr_epoch_offset;) 1614 1615 #define THREAD_FIELDS_DO(macro) \ 1616 macro(_holder_offset, k, "holder", thread_fieldholder_signature, false); \ 1617 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 1618 macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \ 1619 macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \ 1620 macro(_eetop_offset, k, "eetop", long_signature, false); \ 1621 macro(_interrupted_offset, k, "interrupted", bool_signature, false); \ 1622 macro(_interruptLock_offset, k, "interruptLock", object_signature, false); \ 1623 macro(_tid_offset, k, "tid", long_signature, false); \ 1624 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \ 1625 macro(_continuation_offset, k, "cont", continuation_signature, false); \ 1626 macro(_scopedValueBindings_offset, k, "scopedValueBindings", object_signature, false); 1627 1628 void java_lang_Thread::compute_offsets() { 1629 assert(_holder_offset == 0, "offsets should be initialized only once"); 1630 1631 InstanceKlass* k = vmClasses::Thread_klass(); 1632 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1633 THREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 1634 } 1635 1636 #if INCLUDE_CDS 1637 void java_lang_Thread::serialize_offsets(SerializeClosure* f) { 1638 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1639 THREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 1640 } 1641 #endif 1642 1643 JavaThread* java_lang_Thread::thread(oop java_thread) { 1644 return reinterpret_cast<JavaThread*>(java_thread->address_field(_eetop_offset)); 1645 } 1646 1647 JavaThread* java_lang_Thread::thread_acquire(oop java_thread) { 1648 return reinterpret_cast<JavaThread*>(java_thread->address_field_acquire(_eetop_offset)); 1649 } 1650 1651 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) { 1652 java_thread->address_field_put(_eetop_offset, (address)thread); 1653 } 1654 1655 void java_lang_Thread::release_set_thread(oop java_thread, JavaThread* thread) { 1656 java_thread->release_address_field_put(_eetop_offset, (address)thread); 1657 } 1658 1659 JvmtiThreadState* java_lang_Thread::jvmti_thread_state(oop java_thread) { 1660 return (JvmtiThreadState*)java_thread->address_field(_jvmti_thread_state_offset); 1661 } 1662 1663 void java_lang_Thread::set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state) { 1664 java_thread->address_field_put(_jvmti_thread_state_offset, (address)state); 1665 } 1666 1667 int java_lang_Thread::VTMS_transition_disable_count(oop java_thread) { 1668 return java_thread->int_field(_jvmti_VTMS_transition_disable_count_offset); 1669 } 1670 1671 void java_lang_Thread::inc_VTMS_transition_disable_count(oop java_thread) { 1672 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked"); 1673 int val = VTMS_transition_disable_count(java_thread); 1674 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val + 1); 1675 } 1676 1677 void java_lang_Thread::dec_VTMS_transition_disable_count(oop java_thread) { 1678 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked"); 1679 int val = VTMS_transition_disable_count(java_thread); 1680 assert(val > 0, "VTMS_transition_disable_count should never be negative"); 1681 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val - 1); 1682 } 1683 1684 bool java_lang_Thread::is_in_VTMS_transition(oop java_thread) { 1685 return java_thread->bool_field_volatile(_jvmti_is_in_VTMS_transition_offset); 1686 } 1687 1688 void java_lang_Thread::set_is_in_VTMS_transition(oop java_thread, bool val) { 1689 java_thread->bool_field_put_volatile(_jvmti_is_in_VTMS_transition_offset, val); 1690 } 1691 1692 int java_lang_Thread::is_in_VTMS_transition_offset() { 1693 return _jvmti_is_in_VTMS_transition_offset; 1694 } 1695 1696 void java_lang_Thread::clear_scopedValueBindings(oop java_thread) { 1697 assert(java_thread != nullptr, "need a java_lang_Thread pointer here"); 1698 java_thread->obj_field_put(_scopedValueBindings_offset, nullptr); 1699 } 1700 1701 oop java_lang_Thread::holder(oop java_thread) { 1702 // Note: may return null if the thread is still attaching 1703 return java_thread->obj_field(_holder_offset); 1704 } 1705 oop java_lang_Thread::interrupt_lock(oop java_thread) { 1706 return java_thread->obj_field(_interruptLock_offset); 1707 } 1708 1709 bool java_lang_Thread::interrupted(oop java_thread) { 1710 // Make sure the caller can safely access oops. 1711 assert(Thread::current()->is_VM_thread() || 1712 (JavaThread::current()->thread_state() != _thread_blocked && 1713 JavaThread::current()->thread_state() != _thread_in_native), 1714 "Unsafe access to oop"); 1715 return java_thread->bool_field_volatile(_interrupted_offset); 1716 } 1717 1718 void java_lang_Thread::set_interrupted(oop java_thread, bool val) { 1719 // Make sure the caller can safely access oops. 1720 assert(Thread::current()->is_VM_thread() || 1721 (JavaThread::current()->thread_state() != _thread_blocked && 1722 JavaThread::current()->thread_state() != _thread_in_native), 1723 "Unsafe access to oop"); 1724 java_thread->bool_field_put_volatile(_interrupted_offset, val); 1725 } 1726 1727 1728 oop java_lang_Thread::name(oop java_thread) { 1729 return java_thread->obj_field(_name_offset); 1730 } 1731 1732 1733 void java_lang_Thread::set_name(oop java_thread, oop name) { 1734 java_thread->obj_field_put(_name_offset, name); 1735 } 1736 1737 // Convenience macros for setting and getting Thread fields that 1738 // are actually stored in the FieldHolder object of the thread. 1739 // The FieldHolder can be null whilst a thread is attaching via 1740 // JNI, and when the main thread is attaching. 1741 1742 // The default value should be the default/zero initialized value 1743 // of the field as it would be in java.lang.Thread.FieldHolder. 1744 #define GET_FIELDHOLDER_FIELD(java_thread, field, default_val) \ 1745 { \ 1746 oop holder = java_lang_Thread::holder(java_thread); \ 1747 if (holder != nullptr) \ 1748 return java_lang_Thread_FieldHolder::field(holder); \ 1749 else \ 1750 return default_val; \ 1751 } 1752 1753 // We should never be trying to set a field of an attaching thread. 1754 #define SET_FIELDHOLDER_FIELD(java_thread, field, value) \ 1755 { \ 1756 oop holder = java_lang_Thread::holder(java_thread); \ 1757 assert(holder != nullptr, "Thread not fully initialized"); \ 1758 java_lang_Thread_FieldHolder::set_##field(holder, value); \ 1759 } 1760 1761 1762 ThreadPriority java_lang_Thread::priority(oop java_thread) { 1763 GET_FIELDHOLDER_FIELD(java_thread, priority, (ThreadPriority)0); 1764 } 1765 1766 1767 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) { 1768 SET_FIELDHOLDER_FIELD(java_thread, priority, priority) 1769 } 1770 1771 1772 oop java_lang_Thread::threadGroup(oop java_thread) { 1773 GET_FIELDHOLDER_FIELD(java_thread, threadGroup, nullptr); 1774 } 1775 1776 1777 bool java_lang_Thread::is_alive(oop java_thread) { 1778 JavaThread* thr = java_lang_Thread::thread(java_thread); 1779 return (thr != nullptr); 1780 } 1781 1782 1783 bool java_lang_Thread::is_daemon(oop java_thread) { 1784 GET_FIELDHOLDER_FIELD(java_thread, is_daemon, false); 1785 } 1786 1787 1788 void java_lang_Thread::set_daemon(oop java_thread) { 1789 SET_FIELDHOLDER_FIELD(java_thread, daemon, true); 1790 } 1791 1792 oop java_lang_Thread::context_class_loader(oop java_thread) { 1793 return java_thread->obj_field(_contextClassLoader_offset); 1794 } 1795 1796 oop java_lang_Thread::inherited_access_control_context(oop java_thread) { 1797 return java_thread->obj_field(_inheritedAccessControlContext_offset); 1798 } 1799 1800 1801 jlong java_lang_Thread::stackSize(oop java_thread) { 1802 GET_FIELDHOLDER_FIELD(java_thread, stackSize, 0); 1803 } 1804 1805 // Write the thread status value to threadStatus field in java.lang.Thread java class. 1806 void java_lang_Thread::set_thread_status(oop java_thread, JavaThreadStatus status) { 1807 SET_FIELDHOLDER_FIELD(java_thread, thread_status, status); 1808 } 1809 1810 // Read thread status value from threadStatus field in java.lang.Thread java class. 1811 JavaThreadStatus java_lang_Thread::get_thread_status(oop java_thread) { 1812 // Make sure the caller is operating on behalf of the VM or is 1813 // running VM code (state == _thread_in_vm). 1814 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() || 1815 JavaThread::current()->thread_state() == _thread_in_vm, 1816 "Java Thread is not running in vm"); 1817 GET_FIELDHOLDER_FIELD(java_thread, get_thread_status, JavaThreadStatus::NEW /* not initialized */); 1818 } 1819 1820 ByteSize java_lang_Thread::thread_id_offset() { 1821 return in_ByteSize(_tid_offset); 1822 } 1823 1824 oop java_lang_Thread::park_blocker(oop java_thread) { 1825 return java_thread->obj_field(_park_blocker_offset); 1826 } 1827 1828 oop java_lang_Thread::async_get_stack_trace(oop java_thread, TRAPS) { 1829 ThreadsListHandle tlh(JavaThread::current()); 1830 JavaThread* thread; 1831 bool is_virtual = java_lang_VirtualThread::is_instance(java_thread); 1832 if (is_virtual) { 1833 oop carrier_thread = java_lang_VirtualThread::carrier_thread(java_thread); 1834 if (carrier_thread == nullptr) { 1835 return nullptr; 1836 } 1837 thread = java_lang_Thread::thread(carrier_thread); 1838 } else { 1839 thread = java_lang_Thread::thread(java_thread); 1840 } 1841 if (thread == nullptr) { 1842 return nullptr; 1843 } 1844 1845 class GetStackTraceClosure : public HandshakeClosure { 1846 public: 1847 const Handle _java_thread; 1848 int _depth; 1849 bool _retry_handshake; 1850 GrowableArray<Method*>* _methods; 1851 GrowableArray<int>* _bcis; 1852 1853 GetStackTraceClosure(Handle java_thread) : 1854 HandshakeClosure("GetStackTraceClosure"), _java_thread(java_thread), _depth(0), _retry_handshake(false), 1855 _methods(nullptr), _bcis(nullptr) { 1856 } 1857 ~GetStackTraceClosure() { 1858 delete _methods; 1859 delete _bcis; 1860 } 1861 1862 bool read_reset_retry() { 1863 bool ret = _retry_handshake; 1864 // If we re-execute the handshake this method need to return false 1865 // when the handshake cannot be performed. (E.g. thread terminating) 1866 _retry_handshake = false; 1867 return ret; 1868 } 1869 1870 void do_thread(Thread* th) { 1871 if (!Thread::current()->is_Java_thread()) { 1872 _retry_handshake = true; 1873 return; 1874 } 1875 1876 JavaThread* thread = JavaThread::cast(th); 1877 1878 if (!thread->has_last_Java_frame()) { 1879 return; 1880 } 1881 1882 bool carrier = false; 1883 if (java_lang_VirtualThread::is_instance(_java_thread())) { 1884 // if (thread->vthread() != _java_thread()) // We might be inside a System.executeOnCarrierThread 1885 const ContinuationEntry* ce = thread->vthread_continuation(); 1886 if (ce == nullptr || ce->cont_oop(thread) != java_lang_VirtualThread::continuation(_java_thread())) { 1887 return; // not mounted 1888 } 1889 } else { 1890 carrier = (thread->vthread_continuation() != nullptr); 1891 } 1892 1893 const int max_depth = MaxJavaStackTraceDepth; 1894 const bool skip_hidden = !ShowHiddenFrames; 1895 1896 // Pick minimum length that will cover most cases 1897 int init_length = 64; 1898 _methods = new (mtInternal) GrowableArray<Method*>(init_length, mtInternal); 1899 _bcis = new (mtInternal) GrowableArray<int>(init_length, mtInternal); 1900 1901 int total_count = 0; 1902 for (vframeStream vfst(thread, false, false, carrier); // we don't process frames as we don't care about oops 1903 !vfst.at_end() && (max_depth == 0 || max_depth != total_count); 1904 vfst.next()) { 1905 1906 if (skip_hidden && (vfst.method()->is_hidden() || 1907 vfst.method()->is_continuation_enter_intrinsic())) { 1908 continue; 1909 } 1910 1911 _methods->push(vfst.method()); 1912 _bcis->push(vfst.bci()); 1913 total_count++; 1914 } 1915 1916 _depth = total_count; 1917 } 1918 }; 1919 1920 // Handshake with target 1921 ResourceMark rm(THREAD); 1922 HandleMark hm(THREAD); 1923 GetStackTraceClosure gstc(Handle(THREAD, java_thread)); 1924 do { 1925 Handshake::execute(&gstc, &tlh, thread); 1926 } while (gstc.read_reset_retry()); 1927 1928 // Stop if no stack trace is found. 1929 if (gstc._depth == 0) { 1930 return nullptr; 1931 } 1932 1933 // Convert to StackTraceElement array 1934 InstanceKlass* k = vmClasses::StackTraceElement_klass(); 1935 assert(k != nullptr, "must be loaded in 1.4+"); 1936 if (k->should_be_initialized()) { 1937 k->initialize(CHECK_NULL); 1938 } 1939 objArrayHandle trace = oopFactory::new_objArray_handle(k, gstc._depth, CHECK_NULL); 1940 1941 for (int i = 0; i < gstc._depth; i++) { 1942 methodHandle method(THREAD, gstc._methods->at(i)); 1943 oop element = java_lang_StackTraceElement::create(method, 1944 gstc._bcis->at(i), 1945 CHECK_NULL); 1946 trace->obj_at_put(i, element); 1947 } 1948 1949 return trace(); 1950 } 1951 1952 const char* java_lang_Thread::thread_status_name(oop java_thread) { 1953 JavaThreadStatus status = get_thread_status(java_thread); 1954 switch (status) { 1955 case JavaThreadStatus::NEW : return "NEW"; 1956 case JavaThreadStatus::RUNNABLE : return "RUNNABLE"; 1957 case JavaThreadStatus::SLEEPING : return "TIMED_WAITING (sleeping)"; 1958 case JavaThreadStatus::IN_OBJECT_WAIT : return "WAITING (on object monitor)"; 1959 case JavaThreadStatus::IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)"; 1960 case JavaThreadStatus::PARKED : return "WAITING (parking)"; 1961 case JavaThreadStatus::PARKED_TIMED : return "TIMED_WAITING (parking)"; 1962 case JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)"; 1963 case JavaThreadStatus::TERMINATED : return "TERMINATED"; 1964 default : return "UNKNOWN"; 1965 }; 1966 } 1967 int java_lang_ThreadGroup::_parent_offset; 1968 int java_lang_ThreadGroup::_name_offset; 1969 int java_lang_ThreadGroup::_maxPriority_offset; 1970 int java_lang_ThreadGroup::_daemon_offset; 1971 1972 oop java_lang_ThreadGroup::parent(oop java_thread_group) { 1973 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1974 return java_thread_group->obj_field(_parent_offset); 1975 } 1976 1977 // ("name as oop" accessor is not necessary) 1978 1979 const char* java_lang_ThreadGroup::name(oop java_thread_group) { 1980 oop name = java_thread_group->obj_field(_name_offset); 1981 // ThreadGroup.name can be null 1982 if (name != nullptr) { 1983 return java_lang_String::as_utf8_string(name); 1984 } 1985 return nullptr; 1986 } 1987 1988 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) { 1989 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1990 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset); 1991 } 1992 1993 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) { 1994 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 1995 return java_thread_group->bool_field(_daemon_offset) != 0; 1996 } 1997 1998 #define THREADGROUP_FIELDS_DO(macro) \ 1999 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \ 2000 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 2001 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \ 2002 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); 2003 2004 void java_lang_ThreadGroup::compute_offsets() { 2005 assert(_parent_offset == 0, "offsets should be initialized only once"); 2006 2007 InstanceKlass* k = vmClasses::ThreadGroup_klass(); 2008 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2009 } 2010 2011 #if INCLUDE_CDS 2012 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) { 2013 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2014 } 2015 #endif 2016 2017 2018 // java_lang_VirtualThread 2019 2020 int java_lang_VirtualThread::static_vthread_scope_offset; 2021 int java_lang_VirtualThread::_carrierThread_offset; 2022 int java_lang_VirtualThread::_continuation_offset; 2023 int java_lang_VirtualThread::_state_offset; 2024 2025 #define VTHREAD_FIELDS_DO(macro) \ 2026 macro(static_vthread_scope_offset, k, "VTHREAD_SCOPE", continuationscope_signature, true); \ 2027 macro(_carrierThread_offset, k, "carrierThread", thread_signature, false); \ 2028 macro(_continuation_offset, k, "cont", continuation_signature, false); \ 2029 macro(_state_offset, k, "state", int_signature, false) 2030 2031 2032 void java_lang_VirtualThread::compute_offsets() { 2033 InstanceKlass* k = vmClasses::VirtualThread_klass(); 2034 VTHREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2035 } 2036 2037 bool java_lang_VirtualThread::is_instance(oop obj) { 2038 return obj != nullptr && is_subclass(obj->klass()); 2039 } 2040 2041 oop java_lang_VirtualThread::carrier_thread(oop vthread) { 2042 oop thread = vthread->obj_field(_carrierThread_offset); 2043 return thread; 2044 } 2045 2046 oop java_lang_VirtualThread::continuation(oop vthread) { 2047 oop cont = vthread->obj_field(_continuation_offset); 2048 return cont; 2049 } 2050 2051 int java_lang_VirtualThread::state(oop vthread) { 2052 return vthread->int_field_acquire(_state_offset); 2053 } 2054 2055 JavaThreadStatus java_lang_VirtualThread::map_state_to_thread_status(int state) { 2056 JavaThreadStatus status = JavaThreadStatus::NEW; 2057 switch (state & ~SUSPENDED) { 2058 case NEW: 2059 status = JavaThreadStatus::NEW; 2060 break; 2061 case STARTED: 2062 case RUNNING: 2063 case PARKING: 2064 case TIMED_PARKING: 2065 case UNPARKED: 2066 case YIELDING: 2067 case YIELDED: 2068 status = JavaThreadStatus::RUNNABLE; 2069 break; 2070 case PARKED: 2071 case PINNED: 2072 status = JavaThreadStatus::PARKED; 2073 break; 2074 case TIMED_PARKED: 2075 case TIMED_PINNED: 2076 status = JavaThreadStatus::PARKED_TIMED; 2077 break; 2078 case TERMINATED: 2079 status = JavaThreadStatus::TERMINATED; 2080 break; 2081 default: 2082 ShouldNotReachHere(); 2083 } 2084 return status; 2085 } 2086 2087 #if INCLUDE_CDS 2088 void java_lang_VirtualThread::serialize_offsets(SerializeClosure* f) { 2089 VTHREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2090 } 2091 #endif 2092 2093 // java_lang_Throwable 2094 2095 int java_lang_Throwable::_backtrace_offset; 2096 int java_lang_Throwable::_detailMessage_offset; 2097 int java_lang_Throwable::_stackTrace_offset; 2098 int java_lang_Throwable::_depth_offset; 2099 int java_lang_Throwable::_cause_offset; 2100 int java_lang_Throwable::_static_unassigned_stacktrace_offset; 2101 2102 #define THROWABLE_FIELDS_DO(macro) \ 2103 macro(_backtrace_offset, k, "backtrace", object_signature, false); \ 2104 macro(_detailMessage_offset, k, "detailMessage", string_signature, false); \ 2105 macro(_stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \ 2106 macro(_depth_offset, k, "depth", int_signature, false); \ 2107 macro(_cause_offset, k, "cause", throwable_signature, false); \ 2108 macro(_static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true) 2109 2110 void java_lang_Throwable::compute_offsets() { 2111 InstanceKlass* k = vmClasses::Throwable_klass(); 2112 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2113 } 2114 2115 #if INCLUDE_CDS 2116 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) { 2117 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2118 } 2119 #endif 2120 2121 oop java_lang_Throwable::unassigned_stacktrace() { 2122 InstanceKlass* ik = vmClasses::Throwable_klass(); 2123 oop base = ik->static_field_base_raw(); 2124 return base->obj_field(_static_unassigned_stacktrace_offset); 2125 } 2126 2127 oop java_lang_Throwable::backtrace(oop throwable) { 2128 return throwable->obj_field_acquire(_backtrace_offset); 2129 } 2130 2131 2132 void java_lang_Throwable::set_backtrace(oop throwable, oop value) { 2133 throwable->release_obj_field_put(_backtrace_offset, value); 2134 } 2135 2136 int java_lang_Throwable::depth(oop throwable) { 2137 return throwable->int_field(_depth_offset); 2138 } 2139 2140 void java_lang_Throwable::set_depth(oop throwable, int value) { 2141 throwable->int_field_put(_depth_offset, value); 2142 } 2143 2144 oop java_lang_Throwable::message(oop throwable) { 2145 return throwable->obj_field(_detailMessage_offset); 2146 } 2147 2148 const char* java_lang_Throwable::message_as_utf8(oop throwable) { 2149 oop msg = java_lang_Throwable::message(throwable); 2150 const char* msg_utf8 = nullptr; 2151 if (msg != nullptr) { 2152 msg_utf8 = java_lang_String::as_utf8_string(msg); 2153 } 2154 return msg_utf8; 2155 } 2156 2157 oop java_lang_Throwable::cause(oop throwable) { 2158 return throwable->obj_field(_cause_offset); 2159 } 2160 2161 void java_lang_Throwable::set_message(oop throwable, oop value) { 2162 throwable->obj_field_put(_detailMessage_offset, value); 2163 } 2164 2165 2166 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) { 2167 throwable->obj_field_put(_stackTrace_offset, st_element_array); 2168 } 2169 2170 void java_lang_Throwable::clear_stacktrace(oop throwable) { 2171 set_stacktrace(throwable, nullptr); 2172 } 2173 2174 2175 void java_lang_Throwable::print(oop throwable, outputStream* st) { 2176 ResourceMark rm; 2177 Klass* k = throwable->klass(); 2178 assert(k != nullptr, "just checking"); 2179 st->print("%s", k->external_name()); 2180 oop msg = message(throwable); 2181 if (msg != nullptr) { 2182 st->print(": %s", java_lang_String::as_utf8_string(msg)); 2183 } 2184 } 2185 2186 // After this many redefines, the stack trace is unreliable. 2187 const int MAX_VERSION = USHRT_MAX; 2188 2189 static inline bool version_matches(Method* method, int version) { 2190 assert(version < MAX_VERSION, "version is too big"); 2191 return method != nullptr && (method->constants()->version() == version); 2192 } 2193 2194 // This class provides a simple wrapper over the internal structure of 2195 // exception backtrace to insulate users of the backtrace from needing 2196 // to know what it looks like. 2197 // The code of this class is not GC safe. Allocations can only happen 2198 // in expand(). 2199 class BacktraceBuilder: public StackObj { 2200 friend class BacktraceIterator; 2201 private: 2202 Handle _backtrace; 2203 objArrayOop _head; 2204 typeArrayOop _methods; 2205 typeArrayOop _bcis; 2206 objArrayOop _mirrors; 2207 typeArrayOop _names; // Needed to insulate method name against redefinition. 2208 // True if the top frame of the backtrace is omitted because it shall be hidden. 2209 bool _has_hidden_top_frame; 2210 int _index; 2211 NoSafepointVerifier _nsv; 2212 2213 enum { 2214 trace_methods_offset = java_lang_Throwable::trace_methods_offset, 2215 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset, 2216 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset, 2217 trace_names_offset = java_lang_Throwable::trace_names_offset, 2218 trace_conts_offset = java_lang_Throwable::trace_conts_offset, 2219 trace_next_offset = java_lang_Throwable::trace_next_offset, 2220 trace_hidden_offset = java_lang_Throwable::trace_hidden_offset, 2221 trace_size = java_lang_Throwable::trace_size, 2222 trace_chunk_size = java_lang_Throwable::trace_chunk_size 2223 }; 2224 2225 // get info out of chunks 2226 static typeArrayOop get_methods(objArrayHandle chunk) { 2227 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset)); 2228 assert(methods != nullptr, "method array should be initialized in backtrace"); 2229 return methods; 2230 } 2231 static typeArrayOop get_bcis(objArrayHandle chunk) { 2232 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 2233 assert(bcis != nullptr, "bci array should be initialized in backtrace"); 2234 return bcis; 2235 } 2236 static objArrayOop get_mirrors(objArrayHandle chunk) { 2237 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset)); 2238 assert(mirrors != nullptr, "mirror array should be initialized in backtrace"); 2239 return mirrors; 2240 } 2241 static typeArrayOop get_names(objArrayHandle chunk) { 2242 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset)); 2243 assert(names != nullptr, "names array should be initialized in backtrace"); 2244 return names; 2245 } 2246 static bool has_hidden_top_frame(objArrayHandle chunk) { 2247 oop hidden = chunk->obj_at(trace_hidden_offset); 2248 return hidden != nullptr; 2249 } 2250 2251 public: 2252 2253 // constructor for new backtrace 2254 BacktraceBuilder(TRAPS): _head(nullptr), _methods(nullptr), _bcis(nullptr), _mirrors(nullptr), _names(nullptr), _has_hidden_top_frame(false) { 2255 expand(CHECK); 2256 _backtrace = Handle(THREAD, _head); 2257 _index = 0; 2258 } 2259 2260 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) { 2261 _methods = get_methods(backtrace); 2262 _bcis = get_bcis(backtrace); 2263 _mirrors = get_mirrors(backtrace); 2264 _names = get_names(backtrace); 2265 _has_hidden_top_frame = has_hidden_top_frame(backtrace); 2266 assert(_methods->length() == _bcis->length() && 2267 _methods->length() == _mirrors->length() && 2268 _mirrors->length() == _names->length(), 2269 "method and source information arrays should match"); 2270 2271 // head is the preallocated backtrace 2272 _head = backtrace(); 2273 _backtrace = Handle(thread, _head); 2274 _index = 0; 2275 } 2276 2277 void expand(TRAPS) { 2278 objArrayHandle old_head(THREAD, _head); 2279 PauseNoSafepointVerifier pnsv(&_nsv); 2280 2281 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK); 2282 objArrayHandle new_head(THREAD, head); 2283 2284 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK); 2285 typeArrayHandle new_methods(THREAD, methods); 2286 2287 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK); 2288 typeArrayHandle new_bcis(THREAD, bcis); 2289 2290 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK); 2291 objArrayHandle new_mirrors(THREAD, mirrors); 2292 2293 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK); 2294 typeArrayHandle new_names(THREAD, names); 2295 2296 if (!old_head.is_null()) { 2297 old_head->obj_at_put(trace_next_offset, new_head()); 2298 } 2299 new_head->obj_at_put(trace_methods_offset, new_methods()); 2300 new_head->obj_at_put(trace_bcis_offset, new_bcis()); 2301 new_head->obj_at_put(trace_mirrors_offset, new_mirrors()); 2302 new_head->obj_at_put(trace_names_offset, new_names()); 2303 new_head->obj_at_put(trace_hidden_offset, nullptr); 2304 2305 _head = new_head(); 2306 _methods = new_methods(); 2307 _bcis = new_bcis(); 2308 _mirrors = new_mirrors(); 2309 _names = new_names(); 2310 _index = 0; 2311 } 2312 2313 oop backtrace() { 2314 return _backtrace(); 2315 } 2316 2317 inline void push(Method* method, int bci, TRAPS) { 2318 // Smear the -1 bci to 0 since the array only holds unsigned 2319 // shorts. The later line number lookup would just smear the -1 2320 // to a 0 even if it could be recorded. 2321 if (bci == SynchronizationEntryBCI) bci = 0; 2322 2323 if (_index >= trace_chunk_size) { 2324 methodHandle mhandle(THREAD, method); 2325 expand(CHECK); 2326 method = mhandle(); 2327 } 2328 2329 _methods->ushort_at_put(_index, method->orig_method_idnum()); 2330 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version())); 2331 2332 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the 2333 // klass owning the symbols alive so their refcounts aren't decremented. 2334 Symbol* name = method->name(); 2335 _names->symbol_at_put(_index, name); 2336 2337 // We need to save the mirrors in the backtrace to keep the class 2338 // from being unloaded while we still have this stack trace. 2339 assert(method->method_holder()->java_mirror() != nullptr, "never push null for mirror"); 2340 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror()); 2341 2342 _index++; 2343 } 2344 2345 void set_has_hidden_top_frame() { 2346 if (!_has_hidden_top_frame) { 2347 // It would be nice to add java/lang/Boolean::TRUE here 2348 // to indicate that this backtrace has a hidden top frame. 2349 // But this code is used before TRUE is allocated. 2350 // Therefore let's just use an arbitrary legal oop 2351 // available right here. _methods is a short[]. 2352 assert(_methods != nullptr, "we need a legal oop"); 2353 _has_hidden_top_frame = true; 2354 _head->obj_at_put(trace_hidden_offset, _methods); 2355 } 2356 } 2357 }; 2358 2359 struct BacktraceElement : public StackObj { 2360 int _method_id; 2361 int _bci; 2362 int _version; 2363 Symbol* _name; 2364 Handle _mirror; 2365 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) : 2366 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {} 2367 }; 2368 2369 class BacktraceIterator : public StackObj { 2370 int _index; 2371 objArrayHandle _result; 2372 objArrayHandle _mirrors; 2373 typeArrayHandle _methods; 2374 typeArrayHandle _bcis; 2375 typeArrayHandle _names; 2376 2377 void init(objArrayHandle result, Thread* thread) { 2378 // Get method id, bci, version and mirror from chunk 2379 _result = result; 2380 if (_result.not_null()) { 2381 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result)); 2382 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result)); 2383 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result)); 2384 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result)); 2385 _index = 0; 2386 } 2387 } 2388 public: 2389 BacktraceIterator(objArrayHandle result, Thread* thread) { 2390 init(result, thread); 2391 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match"); 2392 } 2393 2394 BacktraceElement next(Thread* thread) { 2395 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)), 2396 _methods->ushort_at(_index), 2397 Backtrace::version_at(_bcis->int_at(_index)), 2398 Backtrace::bci_at(_bcis->int_at(_index)), 2399 _names->symbol_at(_index)); 2400 _index++; 2401 2402 if (_index >= java_lang_Throwable::trace_chunk_size) { 2403 int next_offset = java_lang_Throwable::trace_next_offset; 2404 // Get next chunk 2405 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset))); 2406 init(result, thread); 2407 } 2408 return e; 2409 } 2410 2411 bool repeat() { 2412 return _result.not_null() && _mirrors->obj_at(_index) != nullptr; 2413 } 2414 }; 2415 2416 2417 // Print stack trace element to resource allocated buffer 2418 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id, 2419 int version, int bci, Symbol* name) { 2420 ResourceMark rm; 2421 2422 // Get strings and string lengths 2423 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 2424 const char* klass_name = holder->external_name(); 2425 int buf_len = (int)strlen(klass_name); 2426 2427 char* method_name = name->as_C_string(); 2428 buf_len += (int)strlen(method_name); 2429 2430 char* source_file_name = nullptr; 2431 Symbol* source = Backtrace::get_source_file_name(holder, version); 2432 if (source != nullptr) { 2433 source_file_name = source->as_C_string(); 2434 buf_len += (int)strlen(source_file_name); 2435 } 2436 2437 char *module_name = nullptr, *module_version = nullptr; 2438 ModuleEntry* module = holder->module(); 2439 if (module->is_named()) { 2440 module_name = module->name()->as_C_string(); 2441 buf_len += (int)strlen(module_name); 2442 if (module->version() != nullptr) { 2443 module_version = module->version()->as_C_string(); 2444 buf_len += (int)strlen(module_version); 2445 } 2446 } 2447 2448 // Allocate temporary buffer with extra space for formatting and line number 2449 const size_t buf_size = buf_len + 64; 2450 char* buf = NEW_RESOURCE_ARRAY(char, buf_size); 2451 2452 // Print stack trace line in buffer 2453 size_t buf_off = os::snprintf_checked(buf, buf_size, "\tat %s.%s(", klass_name, method_name); 2454 2455 // Print module information 2456 if (module_name != nullptr) { 2457 if (module_version != nullptr) { 2458 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s@%s/", module_name, module_version); 2459 } else { 2460 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s/", module_name); 2461 } 2462 } 2463 2464 // The method can be null if the requested class version is gone 2465 Method* method = holder->method_with_orig_idnum(method_id, version); 2466 if (!version_matches(method, version)) { 2467 strcat(buf, "Redefined)"); 2468 } else { 2469 int line_number = Backtrace::get_line_number(method, bci); 2470 if (line_number == -2) { 2471 strcat(buf, "Native Method)"); 2472 } else { 2473 if (source_file_name != nullptr && (line_number != -1)) { 2474 // Sourcename and linenumber 2475 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s:%d)", source_file_name, line_number); 2476 } else if (source_file_name != nullptr) { 2477 // Just sourcename 2478 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s)", source_file_name); 2479 } else { 2480 // Neither sourcename nor linenumber 2481 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "Unknown Source)"); 2482 } 2483 nmethod* nm = method->code(); 2484 if (WizardMode && nm != nullptr) { 2485 os::snprintf_checked(buf + buf_off, buf_size - buf_off, "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm); 2486 } 2487 } 2488 } 2489 2490 st->print_cr("%s", buf); 2491 } 2492 2493 void java_lang_Throwable::print_stack_element(outputStream *st, Method* method, int bci) { 2494 Handle mirror (Thread::current(), method->method_holder()->java_mirror()); 2495 int method_id = method->orig_method_idnum(); 2496 int version = method->constants()->version(); 2497 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name()); 2498 } 2499 2500 /** 2501 * Print the throwable message and its stack trace plus all causes by walking the 2502 * cause chain. The output looks the same as of Throwable.printStackTrace(). 2503 */ 2504 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) { 2505 // First, print the message. 2506 print(throwable(), st); 2507 st->cr(); 2508 2509 // Now print the stack trace. 2510 JavaThread* THREAD = JavaThread::current(); // For exception macros. 2511 while (throwable.not_null()) { 2512 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable()))); 2513 if (result.is_null()) { 2514 st->print_raw_cr("\t<<no stack trace available>>"); 2515 return; 2516 } 2517 BacktraceIterator iter(result, THREAD); 2518 2519 while (iter.repeat()) { 2520 BacktraceElement bte = iter.next(THREAD); 2521 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name); 2522 } 2523 if (THREAD->can_call_java()) { 2524 // Call getCause() which doesn't necessarily return the _cause field. 2525 ExceptionMark em(THREAD); 2526 JavaValue cause(T_OBJECT); 2527 JavaCalls::call_virtual(&cause, 2528 throwable, 2529 throwable->klass(), 2530 vmSymbols::getCause_name(), 2531 vmSymbols::void_throwable_signature(), 2532 THREAD); 2533 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 2534 if (HAS_PENDING_EXCEPTION) { 2535 CLEAR_PENDING_EXCEPTION; 2536 throwable = Handle(); 2537 } else { 2538 throwable = Handle(THREAD, cause.get_oop()); 2539 if (throwable.not_null()) { 2540 st->print("Caused by: "); 2541 print(throwable(), st); 2542 st->cr(); 2543 } 2544 } 2545 } else { 2546 st->print_raw_cr("<<cannot call Java to get cause>>"); 2547 return; 2548 } 2549 } 2550 } 2551 2552 /** 2553 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace(). 2554 */ 2555 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) { 2556 assert(throwable->is_a(vmClasses::Throwable_klass()), "Throwable instance expected"); 2557 JavaValue result(T_VOID); 2558 JavaCalls::call_virtual(&result, 2559 throwable, 2560 vmClasses::Throwable_klass(), 2561 vmSymbols::printStackTrace_name(), 2562 vmSymbols::void_method_signature(), 2563 THREAD); 2564 } 2565 2566 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) { 2567 if (!StackTraceInThrowable) return; 2568 ResourceMark rm(THREAD); 2569 2570 // Start out by clearing the backtrace for this object, in case the VM 2571 // runs out of memory while allocating the stack trace 2572 set_backtrace(throwable(), nullptr); 2573 // Clear lazily constructed Java level stacktrace if refilling occurs 2574 // This is unnecessary in 1.7+ but harmless 2575 clear_stacktrace(throwable()); 2576 2577 int max_depth = MaxJavaStackTraceDepth; 2578 JavaThread* thread = THREAD; 2579 2580 BacktraceBuilder bt(CHECK); 2581 2582 // If there is no Java frame just return the method that was being called 2583 // with bci 0 2584 if (!thread->has_last_Java_frame()) { 2585 if (max_depth >= 1 && method() != nullptr) { 2586 bt.push(method(), 0, CHECK); 2587 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1); 2588 set_depth(throwable(), 1); 2589 set_backtrace(throwable(), bt.backtrace()); 2590 } 2591 return; 2592 } 2593 2594 // Instead of using vframe directly, this version of fill_in_stack_trace 2595 // basically handles everything by hand. This significantly improved the 2596 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows. 2597 // See bug 6333838 for more details. 2598 // The "ASSERT" here is to verify this method generates the exactly same stack 2599 // trace as utilizing vframe. 2600 #ifdef ASSERT 2601 vframeStream st(thread, false /* stop_at_java_call_stub */, false /* process_frames */); 2602 #endif 2603 int total_count = 0; 2604 RegisterMap map(thread, 2605 RegisterMap::UpdateMap::skip, 2606 RegisterMap::ProcessFrames::skip, 2607 RegisterMap::WalkContinuation::include); 2608 int decode_offset = 0; 2609 nmethod* nm = nullptr; 2610 bool skip_fillInStackTrace_check = false; 2611 bool skip_throwableInit_check = false; 2612 bool skip_hidden = !ShowHiddenFrames; 2613 bool show_carrier = ShowCarrierFrames; 2614 ContinuationEntry* cont_entry = thread->last_continuation(); 2615 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) { 2616 Method* method = nullptr; 2617 int bci = 0; 2618 2619 // Compiled java method case. 2620 if (decode_offset != 0) { 2621 DebugInfoReadStream stream(nm, decode_offset); 2622 decode_offset = stream.read_int(); 2623 method = (Method*)nm->metadata_at(stream.read_int()); 2624 bci = stream.read_bci(); 2625 } else { 2626 if (fr.is_first_frame()) break; 2627 2628 if (Continuation::is_continuation_enterSpecial(fr)) { 2629 assert(cont_entry == Continuation::get_continuation_entry_for_entry_frame(thread, fr), ""); 2630 if (!show_carrier && cont_entry->is_virtual_thread()) { 2631 break; 2632 } 2633 cont_entry = cont_entry->parent(); 2634 } 2635 2636 address pc = fr.pc(); 2637 if (fr.is_interpreted_frame()) { 2638 address bcp; 2639 if (!map.in_cont()) { 2640 bcp = fr.interpreter_frame_bcp(); 2641 method = fr.interpreter_frame_method(); 2642 } else { 2643 bcp = map.stack_chunk()->interpreter_frame_bcp(fr); 2644 method = map.stack_chunk()->interpreter_frame_method(fr); 2645 } 2646 bci = method->bci_from(bcp); 2647 fr = fr.sender(&map); 2648 } else { 2649 CodeBlob* cb = fr.cb(); 2650 // HMMM QQQ might be nice to have frame return nm as null if cb is non-null 2651 // but non nmethod 2652 fr = fr.sender(&map); 2653 if (cb == nullptr || !cb->is_nmethod()) { 2654 continue; 2655 } 2656 nm = cb->as_nmethod(); 2657 assert(nm->method() != nullptr, "must be"); 2658 if (nm->method()->is_native()) { 2659 method = nm->method(); 2660 bci = 0; 2661 } else { 2662 PcDesc* pd = nm->pc_desc_at(pc); 2663 decode_offset = pd->scope_decode_offset(); 2664 // if decode_offset is not equal to 0, it will execute the 2665 // "compiled java method case" at the beginning of the loop. 2666 continue; 2667 } 2668 } 2669 } 2670 #ifdef ASSERT 2671 if (!st.at_end()) { // TODO LOOM remove once we show only vthread trace 2672 assert(st.method() == method && st.bci() == bci, "Wrong stack trace"); 2673 st.next(); 2674 } 2675 #endif 2676 2677 // the format of the stacktrace will be: 2678 // - 1 or more fillInStackTrace frames for the exception class (skipped) 2679 // - 0 or more <init> methods for the exception class (skipped) 2680 // - rest of the stack 2681 2682 if (!skip_fillInStackTrace_check) { 2683 if (method->name() == vmSymbols::fillInStackTrace_name() && 2684 throwable->is_a(method->method_holder())) { 2685 continue; 2686 } 2687 else { 2688 skip_fillInStackTrace_check = true; // gone past them all 2689 } 2690 } 2691 if (!skip_throwableInit_check) { 2692 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering"); 2693 2694 // skip <init> methods of the exception class and superclasses 2695 // This is similar to classic VM. 2696 if (method->name() == vmSymbols::object_initializer_name() && 2697 throwable->is_a(method->method_holder())) { 2698 continue; 2699 } else { 2700 // there are none or we've seen them all - either way stop checking 2701 skip_throwableInit_check = true; 2702 } 2703 } 2704 if (method->is_hidden() || method->is_continuation_enter_intrinsic()) { 2705 if (skip_hidden) { 2706 if (total_count == 0) { 2707 // The top frame will be hidden from the stack trace. 2708 bt.set_has_hidden_top_frame(); 2709 } 2710 continue; 2711 } 2712 } 2713 2714 bt.push(method, bci, CHECK); 2715 total_count++; 2716 } 2717 2718 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count); 2719 2720 // Put completed stack trace into throwable object 2721 set_backtrace(throwable(), bt.backtrace()); 2722 set_depth(throwable(), total_count); 2723 } 2724 2725 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) { 2726 // No-op if stack trace is disabled 2727 if (!StackTraceInThrowable) { 2728 return; 2729 } 2730 2731 // Disable stack traces for some preallocated out of memory errors 2732 if (!Universe::should_fill_in_stack_trace(throwable)) { 2733 return; 2734 } 2735 2736 JavaThread* THREAD = JavaThread::current(); // For exception macros. 2737 PreserveExceptionMark pm(THREAD); 2738 2739 fill_in_stack_trace(throwable, method, THREAD); 2740 // Ignore exceptions thrown during stack trace filling (OOM) and reinstall the 2741 // original exception via the PreserveExceptionMark destructor. 2742 CLEAR_PENDING_EXCEPTION; 2743 } 2744 2745 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 2746 // Allocate stack trace - backtrace is created but not filled in 2747 2748 // No-op if stack trace is disabled 2749 if (!StackTraceInThrowable) return; 2750 BacktraceBuilder bt(CHECK); // creates a backtrace 2751 set_backtrace(throwable(), bt.backtrace()); 2752 } 2753 2754 2755 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 2756 // Fill in stack trace into preallocated backtrace (no GC) 2757 2758 // No-op if stack trace is disabled 2759 if (!StackTraceInThrowable) return; 2760 2761 assert(throwable->is_a(vmClasses::Throwable_klass()), "sanity check"); 2762 2763 JavaThread* THREAD = JavaThread::current(); // For exception macros. 2764 2765 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable())); 2766 assert(backtrace.not_null(), "backtrace should have been preallocated"); 2767 2768 ResourceMark rm(THREAD); 2769 vframeStream st(THREAD, false /* stop_at_java_call_stub */, false /* process_frames */); 2770 2771 BacktraceBuilder bt(THREAD, backtrace); 2772 2773 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 2774 // methods as preallocated errors aren't created by "java" code. 2775 2776 // fill in as much stack trace as possible 2777 int chunk_count = 0; 2778 for (;!st.at_end(); st.next()) { 2779 bt.push(st.method(), st.bci(), CHECK); 2780 chunk_count++; 2781 2782 // Bail-out for deep stacks 2783 if (chunk_count >= trace_chunk_size) break; 2784 } 2785 set_depth(throwable(), chunk_count); 2786 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count); 2787 2788 // We support the Throwable immutability protocol defined for Java 7. 2789 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace()); 2790 assert(java_lang_Throwable::unassigned_stacktrace() != nullptr, "not initialized"); 2791 } 2792 2793 void java_lang_Throwable::get_stack_trace_elements(int depth, Handle backtrace, 2794 objArrayHandle stack_trace_array_h, TRAPS) { 2795 2796 if (backtrace.is_null() || stack_trace_array_h.is_null()) { 2797 THROW(vmSymbols::java_lang_NullPointerException()); 2798 } 2799 2800 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent"); 2801 2802 if (stack_trace_array_h->length() != depth) { 2803 THROW(vmSymbols::java_lang_IndexOutOfBoundsException()); 2804 } 2805 2806 objArrayHandle result(THREAD, objArrayOop(backtrace())); 2807 BacktraceIterator iter(result, THREAD); 2808 2809 int index = 0; 2810 while (iter.repeat()) { 2811 BacktraceElement bte = iter.next(THREAD); 2812 2813 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++)); 2814 2815 if (stack_trace_element.is_null()) { 2816 THROW(vmSymbols::java_lang_NullPointerException()); 2817 } 2818 2819 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror())); 2820 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version)); 2821 2822 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, 2823 method, 2824 bte._version, 2825 bte._bci, 2826 bte._name, 2827 CHECK); 2828 } 2829 } 2830 2831 Handle java_lang_Throwable::create_initialization_error(JavaThread* current, Handle throwable) { 2832 // Creates an ExceptionInInitializerError to be recorded as the initialization error when class initialization 2833 // failed due to the passed in 'throwable'. We cannot save 'throwable' directly due to issues with keeping alive 2834 // all objects referenced via its stacktrace. So instead we save a new EIIE instance, with the same message and 2835 // symbolic stacktrace of 'throwable'. 2836 assert(throwable.not_null(), "shouldn't be"); 2837 2838 // Now create the message from the original exception and thread name. 2839 ResourceMark rm(current); 2840 const char *message = nullptr; 2841 oop detailed_message = java_lang_Throwable::message(throwable()); 2842 if (detailed_message != nullptr) { 2843 message = java_lang_String::as_utf8_string(detailed_message); 2844 } 2845 stringStream st; 2846 st.print("Exception %s%s ", throwable()->klass()->name()->as_klass_external_name(), 2847 message == nullptr ? "" : ":"); 2848 if (message == nullptr) { 2849 st.print("[in thread \"%s\"]", current->name()); 2850 } else { 2851 st.print("%s [in thread \"%s\"]", message, current->name()); 2852 } 2853 2854 Symbol* exception_name = vmSymbols::java_lang_ExceptionInInitializerError(); 2855 Handle init_error = Exceptions::new_exception(current, exception_name, st.as_string()); 2856 // If new_exception returns a different exception while creating the exception, 2857 // abandon the attempt to save the initialization error and return null. 2858 if (init_error->klass()->name() != exception_name) { 2859 log_info(class, init)("Exception %s thrown while saving initialization exception", 2860 init_error->klass()->external_name()); 2861 return Handle(); 2862 } 2863 2864 // Call to java to fill in the stack trace and clear declaringClassObject to 2865 // not keep classes alive in the stack trace. 2866 // call this: public StackTraceElement[] getStackTrace() 2867 JavaValue result(T_ARRAY); 2868 JavaCalls::call_virtual(&result, throwable, 2869 vmClasses::Throwable_klass(), 2870 vmSymbols::getStackTrace_name(), 2871 vmSymbols::getStackTrace_signature(), 2872 current); 2873 if (!current->has_pending_exception()){ 2874 Handle stack_trace(current, result.get_oop()); 2875 assert(stack_trace->is_objArray(), "Should be an array"); 2876 java_lang_Throwable::set_stacktrace(init_error(), stack_trace()); 2877 // Clear backtrace because the stacktrace should be used instead. 2878 set_backtrace(init_error(), nullptr); 2879 } else { 2880 log_info(class, init)("Exception thrown while getting stack trace for initialization exception %s", 2881 init_error->klass()->external_name()); 2882 current->clear_pending_exception(); 2883 } 2884 2885 return init_error; 2886 } 2887 2888 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) { 2889 JavaThread* current = JavaThread::current(); 2890 objArrayHandle result(current, objArrayOop(backtrace(throwable))); 2891 BacktraceIterator iter(result, current); 2892 // No backtrace available. 2893 if (!iter.repeat()) return false; 2894 2895 // If the exception happened in a frame that has been hidden, i.e., 2896 // omitted from the back trace, we can not compute the message. 2897 oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset); 2898 if (hidden != nullptr) { 2899 return false; 2900 } 2901 2902 // Get first backtrace element. 2903 BacktraceElement bte = iter.next(current); 2904 2905 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror())); 2906 assert(holder != nullptr, "first element should be non-null"); 2907 Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version); 2908 2909 // Original version is no longer available. 2910 if (m == nullptr || !version_matches(m, bte._version)) { 2911 return false; 2912 } 2913 2914 *method = m; 2915 *bci = bte._bci; 2916 return true; 2917 } 2918 2919 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) { 2920 // Allocate java.lang.StackTraceElement instance 2921 InstanceKlass* k = vmClasses::StackTraceElement_klass(); 2922 assert(k != nullptr, "must be loaded in 1.4+"); 2923 if (k->should_be_initialized()) { 2924 k->initialize(CHECK_NULL); 2925 } 2926 2927 Handle element = k->allocate_instance_handle(CHECK_NULL); 2928 2929 int version = method->constants()->version(); 2930 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_NULL); 2931 return element(); 2932 } 2933 2934 void java_lang_StackTraceElement::fill_in(Handle element, 2935 InstanceKlass* holder, const methodHandle& method, 2936 int version, int bci, Symbol* name, TRAPS) { 2937 assert(element->is_a(vmClasses::StackTraceElement_klass()), "sanity check"); 2938 2939 ResourceMark rm(THREAD); 2940 HandleMark hm(THREAD); 2941 2942 // Fill in class name 2943 Handle java_class(THREAD, holder->java_mirror()); 2944 oop classname = java_lang_Class::name(java_class, CHECK); 2945 java_lang_StackTraceElement::set_declaringClass(element(), classname); 2946 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class()); 2947 2948 oop loader = holder->class_loader(); 2949 if (loader != nullptr) { 2950 oop loader_name = java_lang_ClassLoader::name(loader); 2951 if (loader_name != nullptr) 2952 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name); 2953 } 2954 2955 // Fill in method name 2956 oop methodname = StringTable::intern(name, CHECK); 2957 java_lang_StackTraceElement::set_methodName(element(), methodname); 2958 2959 // Fill in module name and version 2960 ModuleEntry* module = holder->module(); 2961 if (module->is_named()) { 2962 oop module_name = StringTable::intern(module->name(), CHECK); 2963 java_lang_StackTraceElement::set_moduleName(element(), module_name); 2964 oop module_version; 2965 if (module->version() != nullptr) { 2966 module_version = StringTable::intern(module->version(), CHECK); 2967 } else { 2968 module_version = nullptr; 2969 } 2970 java_lang_StackTraceElement::set_moduleVersion(element(), module_version); 2971 } 2972 2973 if (method() == nullptr || !version_matches(method(), version)) { 2974 // The method was redefined, accurate line number information isn't available 2975 java_lang_StackTraceElement::set_fileName(element(), nullptr); 2976 java_lang_StackTraceElement::set_lineNumber(element(), -1); 2977 } else { 2978 Symbol* source; 2979 oop source_file; 2980 int line_number; 2981 decode_file_and_line(java_class, holder, version, method, bci, source, source_file, line_number, CHECK); 2982 2983 java_lang_StackTraceElement::set_fileName(element(), source_file); 2984 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 2985 } 2986 } 2987 2988 void java_lang_StackTraceElement::decode_file_and_line(Handle java_class, 2989 InstanceKlass* holder, 2990 int version, 2991 const methodHandle& method, 2992 int bci, 2993 Symbol*& source, 2994 oop& source_file, 2995 int& line_number, TRAPS) { 2996 // Fill in source file name and line number. 2997 source = Backtrace::get_source_file_name(holder, version); 2998 source_file = java_lang_Class::source_file(java_class()); 2999 if (source != nullptr) { 3000 // Class was not redefined. We can trust its cache if set, 3001 // else we have to initialize it. 3002 if (source_file == nullptr) { 3003 source_file = StringTable::intern(source, CHECK); 3004 java_lang_Class::set_source_file(java_class(), source_file); 3005 } 3006 } else { 3007 // Class was redefined. Dump the cache if it was set. 3008 if (source_file != nullptr) { 3009 source_file = nullptr; 3010 java_lang_Class::set_source_file(java_class(), source_file); 3011 } 3012 } 3013 line_number = Backtrace::get_line_number(method(), bci); 3014 } 3015 3016 #if INCLUDE_JVMCI 3017 void java_lang_StackTraceElement::decode(const methodHandle& method, int bci, 3018 Symbol*& filename, int& line_number, TRAPS) { 3019 ResourceMark rm(THREAD); 3020 HandleMark hm(THREAD); 3021 3022 filename = nullptr; 3023 line_number = -1; 3024 3025 oop source_file; 3026 int version = method->constants()->version(); 3027 InstanceKlass* holder = method->method_holder(); 3028 Handle java_class(THREAD, holder->java_mirror()); 3029 decode_file_and_line(java_class, holder, version, method, bci, filename, source_file, line_number, CHECK); 3030 } 3031 #endif // INCLUDE_JVMCI 3032 3033 // java_lang_ClassFrameInfo 3034 3035 int java_lang_ClassFrameInfo::_classOrMemberName_offset; 3036 int java_lang_ClassFrameInfo::_flags_offset; 3037 3038 #define CLASSFRAMEINFO_FIELDS_DO(macro) \ 3039 macro(_classOrMemberName_offset, k, "classOrMemberName", object_signature, false); \ 3040 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false) 3041 3042 void java_lang_ClassFrameInfo::compute_offsets() { 3043 InstanceKlass* k = vmClasses::ClassFrameInfo_klass(); 3044 CLASSFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3045 } 3046 3047 #if INCLUDE_CDS 3048 void java_lang_ClassFrameInfo::serialize_offsets(SerializeClosure* f) { 3049 CLASSFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3050 } 3051 #endif 3052 3053 static int get_flags(const methodHandle& m) { 3054 int flags = (jushort)( m->access_flags().as_short() & JVM_RECOGNIZED_METHOD_MODIFIERS ); 3055 if (m->is_initializer()) { 3056 flags |= java_lang_invoke_MemberName::MN_IS_CONSTRUCTOR; 3057 } else { 3058 flags |= java_lang_invoke_MemberName::MN_IS_METHOD; 3059 } 3060 if (m->caller_sensitive()) { 3061 flags |= java_lang_invoke_MemberName::MN_CALLER_SENSITIVE; 3062 } 3063 if (m->is_hidden()) { 3064 flags |= java_lang_invoke_MemberName::MN_HIDDEN_MEMBER; 3065 } 3066 assert((flags & 0xFF000000) == 0, "unexpected flags"); 3067 return flags; 3068 } 3069 3070 oop java_lang_ClassFrameInfo::classOrMemberName(oop obj) { 3071 return obj->obj_field(_classOrMemberName_offset); 3072 } 3073 3074 int java_lang_ClassFrameInfo::flags(oop obj) { 3075 return obj->int_field(_flags_offset); 3076 } 3077 3078 void java_lang_ClassFrameInfo::init_class(Handle stackFrame, const methodHandle& m) { 3079 stackFrame->obj_field_put(_classOrMemberName_offset, m->method_holder()->java_mirror()); 3080 // flags is initialized when ClassFrameInfo object is constructed and retain the value 3081 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m); 3082 stackFrame->int_field_put(_flags_offset, flags); 3083 } 3084 3085 void java_lang_ClassFrameInfo::init_method(Handle stackFrame, const methodHandle& m, TRAPS) { 3086 oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(m, CHECK); 3087 stackFrame->obj_field_put(_classOrMemberName_offset, rmethod_name); 3088 // flags is initialized when ClassFrameInfo object is constructed and retain the value 3089 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m); 3090 stackFrame->int_field_put(_flags_offset, flags); 3091 } 3092 3093 3094 // java_lang_StackFrameInfo 3095 3096 int java_lang_StackFrameInfo::_type_offset; 3097 int java_lang_StackFrameInfo::_name_offset; 3098 int java_lang_StackFrameInfo::_bci_offset; 3099 int java_lang_StackFrameInfo::_version_offset; 3100 int java_lang_StackFrameInfo::_contScope_offset; 3101 3102 #define STACKFRAMEINFO_FIELDS_DO(macro) \ 3103 macro(_type_offset, k, "type", object_signature, false); \ 3104 macro(_name_offset, k, "name", string_signature, false); \ 3105 macro(_bci_offset, k, "bci", int_signature, false); \ 3106 macro(_contScope_offset, k, "contScope", continuationscope_signature, false) 3107 3108 void java_lang_StackFrameInfo::compute_offsets() { 3109 InstanceKlass* k = vmClasses::StackFrameInfo_klass(); 3110 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3111 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3112 } 3113 3114 #if INCLUDE_CDS 3115 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) { 3116 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3117 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3118 } 3119 #endif 3120 3121 Method* java_lang_StackFrameInfo::get_method(oop obj) { 3122 oop m = java_lang_ClassFrameInfo::classOrMemberName(obj); 3123 Method* method = java_lang_invoke_ResolvedMethodName::vmtarget(m); 3124 return method; 3125 } 3126 3127 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS) { 3128 // set Method* or mid/cpref 3129 HandleMark hm(THREAD); 3130 Handle cont_h(THREAD, cont); 3131 java_lang_ClassFrameInfo::init_method(stackFrame, method, CHECK); 3132 3133 // set bci 3134 java_lang_StackFrameInfo::set_bci(stackFrame(), bci); 3135 // method may be redefined; store the version 3136 int version = method->constants()->version(); 3137 assert((jushort)version == version, "version should be short"); 3138 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version); 3139 3140 oop contScope = cont_h() != nullptr ? jdk_internal_vm_Continuation::scope(cont_h()) : (oop)nullptr; 3141 java_lang_StackFrameInfo::set_contScope(stackFrame(), contScope); 3142 } 3143 3144 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) { 3145 ResourceMark rm(THREAD); 3146 HandleMark hm(THREAD); 3147 3148 Method* method = java_lang_StackFrameInfo::get_method(stackFrame()); 3149 InstanceKlass* holder = method->method_holder(); 3150 short version = stackFrame->short_field(_version_offset); 3151 int bci = stackFrame->int_field(_bci_offset); 3152 Symbol* name = method->name(); 3153 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, methodHandle(THREAD, method), version, bci, name, CHECK); 3154 } 3155 3156 oop java_lang_StackFrameInfo::type(oop obj) { 3157 return obj->obj_field(_type_offset); 3158 } 3159 3160 void java_lang_StackFrameInfo::set_type(oop obj, oop value) { 3161 obj->obj_field_put(_type_offset, value); 3162 } 3163 3164 oop java_lang_StackFrameInfo::name(oop obj) { 3165 return obj->obj_field(_name_offset); 3166 } 3167 3168 void java_lang_StackFrameInfo::set_name(oop obj, oop value) { 3169 obj->obj_field_put(_name_offset, value); 3170 } 3171 3172 void java_lang_StackFrameInfo::set_version(oop obj, short value) { 3173 obj->short_field_put(_version_offset, value); 3174 } 3175 3176 void java_lang_StackFrameInfo::set_bci(oop obj, int value) { 3177 assert(value >= 0 && value < max_jushort, "must be a valid bci value"); 3178 obj->int_field_put(_bci_offset, value); 3179 } 3180 3181 void java_lang_StackFrameInfo::set_contScope(oop obj, oop value) { 3182 obj->obj_field_put(_contScope_offset, value); 3183 } 3184 3185 int java_lang_LiveStackFrameInfo::_monitors_offset; 3186 int java_lang_LiveStackFrameInfo::_locals_offset; 3187 int java_lang_LiveStackFrameInfo::_operands_offset; 3188 int java_lang_LiveStackFrameInfo::_mode_offset; 3189 3190 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \ 3191 macro(_monitors_offset, k, "monitors", object_array_signature, false); \ 3192 macro(_locals_offset, k, "locals", object_array_signature, false); \ 3193 macro(_operands_offset, k, "operands", object_array_signature, false); \ 3194 macro(_mode_offset, k, "mode", int_signature, false) 3195 3196 void java_lang_LiveStackFrameInfo::compute_offsets() { 3197 InstanceKlass* k = vmClasses::LiveStackFrameInfo_klass(); 3198 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3199 } 3200 3201 #if INCLUDE_CDS 3202 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) { 3203 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3204 } 3205 #endif 3206 3207 void java_lang_LiveStackFrameInfo::set_monitors(oop obj, oop value) { 3208 obj->obj_field_put(_monitors_offset, value); 3209 } 3210 3211 void java_lang_LiveStackFrameInfo::set_locals(oop obj, oop value) { 3212 obj->obj_field_put(_locals_offset, value); 3213 } 3214 3215 void java_lang_LiveStackFrameInfo::set_operands(oop obj, oop value) { 3216 obj->obj_field_put(_operands_offset, value); 3217 } 3218 3219 void java_lang_LiveStackFrameInfo::set_mode(oop obj, int value) { 3220 obj->int_field_put(_mode_offset, value); 3221 } 3222 3223 3224 // java_lang_AccessibleObject 3225 3226 int java_lang_reflect_AccessibleObject::_override_offset; 3227 3228 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \ 3229 macro(_override_offset, k, "override", bool_signature, false) 3230 3231 void java_lang_reflect_AccessibleObject::compute_offsets() { 3232 InstanceKlass* k = vmClasses::reflect_AccessibleObject_klass(); 3233 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3234 } 3235 3236 #if INCLUDE_CDS 3237 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) { 3238 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3239 } 3240 #endif 3241 3242 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 3243 return (jboolean) reflect->bool_field(_override_offset); 3244 } 3245 3246 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 3247 reflect->bool_field_put(_override_offset, (int) value); 3248 } 3249 3250 // java_lang_reflect_Method 3251 3252 int java_lang_reflect_Method::_clazz_offset; 3253 int java_lang_reflect_Method::_name_offset; 3254 int java_lang_reflect_Method::_returnType_offset; 3255 int java_lang_reflect_Method::_parameterTypes_offset; 3256 int java_lang_reflect_Method::_exceptionTypes_offset; 3257 int java_lang_reflect_Method::_slot_offset; 3258 int java_lang_reflect_Method::_modifiers_offset; 3259 int java_lang_reflect_Method::_signature_offset; 3260 int java_lang_reflect_Method::_annotations_offset; 3261 int java_lang_reflect_Method::_parameter_annotations_offset; 3262 int java_lang_reflect_Method::_annotation_default_offset; 3263 3264 #define METHOD_FIELDS_DO(macro) \ 3265 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3266 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3267 macro(_returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \ 3268 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 3269 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 3270 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 3271 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3272 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 3273 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \ 3274 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \ 3275 macro(_annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false); 3276 3277 void java_lang_reflect_Method::compute_offsets() { 3278 InstanceKlass* k = vmClasses::reflect_Method_klass(); 3279 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3280 } 3281 3282 #if INCLUDE_CDS 3283 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) { 3284 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3285 } 3286 #endif 3287 3288 Handle java_lang_reflect_Method::create(TRAPS) { 3289 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3290 Klass* klass = vmClasses::reflect_Method_klass(); 3291 // This class is eagerly initialized during VM initialization, since we keep a reference 3292 // to one of the methods 3293 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized"); 3294 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD); 3295 } 3296 3297 oop java_lang_reflect_Method::clazz(oop reflect) { 3298 return reflect->obj_field(_clazz_offset); 3299 } 3300 3301 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 3302 reflect->obj_field_put(_clazz_offset, value); 3303 } 3304 3305 int java_lang_reflect_Method::slot(oop reflect) { 3306 return reflect->int_field(_slot_offset); 3307 } 3308 3309 void java_lang_reflect_Method::set_slot(oop reflect, int value) { 3310 reflect->int_field_put(_slot_offset, value); 3311 } 3312 3313 void java_lang_reflect_Method::set_name(oop method, oop value) { 3314 method->obj_field_put(_name_offset, value); 3315 } 3316 3317 oop java_lang_reflect_Method::return_type(oop method) { 3318 return method->obj_field(_returnType_offset); 3319 } 3320 3321 void java_lang_reflect_Method::set_return_type(oop method, oop value) { 3322 method->obj_field_put(_returnType_offset, value); 3323 } 3324 3325 oop java_lang_reflect_Method::parameter_types(oop method) { 3326 return method->obj_field(_parameterTypes_offset); 3327 } 3328 3329 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 3330 method->obj_field_put(_parameterTypes_offset, value); 3331 } 3332 3333 void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 3334 method->obj_field_put(_exceptionTypes_offset, value); 3335 } 3336 3337 void java_lang_reflect_Method::set_modifiers(oop method, int value) { 3338 method->int_field_put(_modifiers_offset, value); 3339 } 3340 3341 void java_lang_reflect_Method::set_signature(oop method, oop value) { 3342 method->obj_field_put(_signature_offset, value); 3343 } 3344 3345 void java_lang_reflect_Method::set_annotations(oop method, oop value) { 3346 method->obj_field_put(_annotations_offset, value); 3347 } 3348 3349 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 3350 method->obj_field_put(_parameter_annotations_offset, value); 3351 } 3352 3353 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 3354 method->obj_field_put(_annotation_default_offset, value); 3355 } 3356 3357 int java_lang_reflect_Constructor::_clazz_offset; 3358 int java_lang_reflect_Constructor::_parameterTypes_offset; 3359 int java_lang_reflect_Constructor::_exceptionTypes_offset; 3360 int java_lang_reflect_Constructor::_slot_offset; 3361 int java_lang_reflect_Constructor::_modifiers_offset; 3362 int java_lang_reflect_Constructor::_signature_offset; 3363 int java_lang_reflect_Constructor::_annotations_offset; 3364 int java_lang_reflect_Constructor::_parameter_annotations_offset; 3365 3366 #define CONSTRUCTOR_FIELDS_DO(macro) \ 3367 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3368 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 3369 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 3370 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 3371 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3372 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 3373 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \ 3374 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); 3375 3376 void java_lang_reflect_Constructor::compute_offsets() { 3377 InstanceKlass* k = vmClasses::reflect_Constructor_klass(); 3378 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3379 } 3380 3381 #if INCLUDE_CDS 3382 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) { 3383 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3384 } 3385 #endif 3386 3387 Handle java_lang_reflect_Constructor::create(TRAPS) { 3388 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3389 Symbol* name = vmSymbols::java_lang_reflect_Constructor(); 3390 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3391 InstanceKlass* ik = InstanceKlass::cast(k); 3392 // Ensure it is initialized 3393 ik->initialize(CHECK_NH); 3394 return ik->allocate_instance_handle(THREAD); 3395 } 3396 3397 oop java_lang_reflect_Constructor::clazz(oop reflect) { 3398 return reflect->obj_field(_clazz_offset); 3399 } 3400 3401 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 3402 reflect->obj_field_put(_clazz_offset, value); 3403 } 3404 3405 oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 3406 return constructor->obj_field(_parameterTypes_offset); 3407 } 3408 3409 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 3410 constructor->obj_field_put(_parameterTypes_offset, value); 3411 } 3412 3413 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 3414 constructor->obj_field_put(_exceptionTypes_offset, value); 3415 } 3416 3417 int java_lang_reflect_Constructor::slot(oop reflect) { 3418 return reflect->int_field(_slot_offset); 3419 } 3420 3421 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 3422 reflect->int_field_put(_slot_offset, value); 3423 } 3424 3425 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 3426 constructor->int_field_put(_modifiers_offset, value); 3427 } 3428 3429 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 3430 constructor->obj_field_put(_signature_offset, value); 3431 } 3432 3433 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 3434 constructor->obj_field_put(_annotations_offset, value); 3435 } 3436 3437 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 3438 method->obj_field_put(_parameter_annotations_offset, value); 3439 } 3440 3441 int java_lang_reflect_Field::_clazz_offset; 3442 int java_lang_reflect_Field::_name_offset; 3443 int java_lang_reflect_Field::_type_offset; 3444 int java_lang_reflect_Field::_slot_offset; 3445 int java_lang_reflect_Field::_modifiers_offset; 3446 int java_lang_reflect_Field::_trusted_final_offset; 3447 int java_lang_reflect_Field::_signature_offset; 3448 int java_lang_reflect_Field::_annotations_offset; 3449 3450 #define FIELD_FIELDS_DO(macro) \ 3451 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3452 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3453 macro(_type_offset, k, vmSymbols::type_name(), class_signature, false); \ 3454 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 3455 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3456 macro(_trusted_final_offset, k, vmSymbols::trusted_final_name(), bool_signature, false); \ 3457 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 3458 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); 3459 3460 void java_lang_reflect_Field::compute_offsets() { 3461 InstanceKlass* k = vmClasses::reflect_Field_klass(); 3462 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3463 } 3464 3465 #if INCLUDE_CDS 3466 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) { 3467 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3468 } 3469 #endif 3470 3471 Handle java_lang_reflect_Field::create(TRAPS) { 3472 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3473 Symbol* name = vmSymbols::java_lang_reflect_Field(); 3474 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3475 InstanceKlass* ik = InstanceKlass::cast(k); 3476 // Ensure it is initialized 3477 ik->initialize(CHECK_NH); 3478 return ik->allocate_instance_handle(THREAD); 3479 } 3480 3481 oop java_lang_reflect_Field::clazz(oop reflect) { 3482 return reflect->obj_field(_clazz_offset); 3483 } 3484 3485 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 3486 reflect->obj_field_put(_clazz_offset, value); 3487 } 3488 3489 oop java_lang_reflect_Field::name(oop field) { 3490 return field->obj_field(_name_offset); 3491 } 3492 3493 void java_lang_reflect_Field::set_name(oop field, oop value) { 3494 field->obj_field_put(_name_offset, value); 3495 } 3496 3497 oop java_lang_reflect_Field::type(oop field) { 3498 return field->obj_field(_type_offset); 3499 } 3500 3501 void java_lang_reflect_Field::set_type(oop field, oop value) { 3502 field->obj_field_put(_type_offset, value); 3503 } 3504 3505 int java_lang_reflect_Field::slot(oop reflect) { 3506 return reflect->int_field(_slot_offset); 3507 } 3508 3509 void java_lang_reflect_Field::set_slot(oop reflect, int value) { 3510 reflect->int_field_put(_slot_offset, value); 3511 } 3512 3513 int java_lang_reflect_Field::modifiers(oop field) { 3514 return field->int_field(_modifiers_offset); 3515 } 3516 3517 void java_lang_reflect_Field::set_modifiers(oop field, int value) { 3518 field->int_field_put(_modifiers_offset, value); 3519 } 3520 3521 void java_lang_reflect_Field::set_trusted_final(oop field) { 3522 field->bool_field_put(_trusted_final_offset, true); 3523 } 3524 3525 void java_lang_reflect_Field::set_signature(oop field, oop value) { 3526 field->obj_field_put(_signature_offset, value); 3527 } 3528 3529 void java_lang_reflect_Field::set_annotations(oop field, oop value) { 3530 field->obj_field_put(_annotations_offset, value); 3531 } 3532 3533 oop java_lang_reflect_RecordComponent::create(InstanceKlass* holder, RecordComponent* component, TRAPS) { 3534 // Allocate java.lang.reflect.RecordComponent instance 3535 HandleMark hm(THREAD); 3536 InstanceKlass* ik = vmClasses::RecordComponent_klass(); 3537 assert(ik != nullptr, "must be loaded"); 3538 ik->initialize(CHECK_NULL); 3539 3540 Handle element = ik->allocate_instance_handle(CHECK_NULL); 3541 3542 Handle decl_class(THREAD, holder->java_mirror()); 3543 java_lang_reflect_RecordComponent::set_clazz(element(), decl_class()); 3544 3545 Symbol* name = holder->constants()->symbol_at(component->name_index()); // name_index is a utf8 3546 oop component_name = StringTable::intern(name, CHECK_NULL); 3547 java_lang_reflect_RecordComponent::set_name(element(), component_name); 3548 3549 Symbol* type = holder->constants()->symbol_at(component->descriptor_index()); 3550 Handle component_type_h = 3551 SystemDictionary::find_java_mirror_for_type(type, holder, SignatureStream::NCDFError, CHECK_NULL); 3552 java_lang_reflect_RecordComponent::set_type(element(), component_type_h()); 3553 3554 Method* accessor_method = nullptr; 3555 { 3556 // Prepend "()" to type to create the full method signature. 3557 ResourceMark rm(THREAD); 3558 int sig_len = type->utf8_length() + 3; // "()" and null char 3559 char* sig = NEW_RESOURCE_ARRAY(char, sig_len); 3560 jio_snprintf(sig, sig_len, "%c%c%s", JVM_SIGNATURE_FUNC, JVM_SIGNATURE_ENDFUNC, type->as_C_string()); 3561 TempNewSymbol full_sig = SymbolTable::new_symbol(sig); 3562 accessor_method = holder->find_instance_method(name, full_sig, Klass::PrivateLookupMode::find); 3563 } 3564 3565 if (accessor_method != nullptr) { 3566 methodHandle method(THREAD, accessor_method); 3567 oop m = Reflection::new_method(method, false, CHECK_NULL); 3568 java_lang_reflect_RecordComponent::set_accessor(element(), m); 3569 } else { 3570 java_lang_reflect_RecordComponent::set_accessor(element(), nullptr); 3571 } 3572 3573 int sig_index = component->generic_signature_index(); 3574 if (sig_index > 0) { 3575 Symbol* sig = holder->constants()->symbol_at(sig_index); // sig_index is a utf8 3576 oop component_sig = StringTable::intern(sig, CHECK_NULL); 3577 java_lang_reflect_RecordComponent::set_signature(element(), component_sig); 3578 } else { 3579 java_lang_reflect_RecordComponent::set_signature(element(), nullptr); 3580 } 3581 3582 typeArrayOop annotation_oop = Annotations::make_java_array(component->annotations(), CHECK_NULL); 3583 java_lang_reflect_RecordComponent::set_annotations(element(), annotation_oop); 3584 3585 typeArrayOop type_annotation_oop = Annotations::make_java_array(component->type_annotations(), CHECK_NULL); 3586 java_lang_reflect_RecordComponent::set_typeAnnotations(element(), type_annotation_oop); 3587 3588 return element(); 3589 } 3590 3591 int reflect_ConstantPool::_oop_offset; 3592 3593 #define CONSTANTPOOL_FIELDS_DO(macro) \ 3594 macro(_oop_offset, k, "constantPoolOop", object_signature, false) 3595 3596 void reflect_ConstantPool::compute_offsets() { 3597 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass(); 3598 // The field is called ConstantPool* in the sun.reflect.ConstantPool class. 3599 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3600 } 3601 3602 #if INCLUDE_CDS 3603 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) { 3604 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3605 } 3606 #endif 3607 3608 int java_lang_reflect_Parameter::_name_offset; 3609 int java_lang_reflect_Parameter::_modifiers_offset; 3610 int java_lang_reflect_Parameter::_index_offset; 3611 int java_lang_reflect_Parameter::_executable_offset; 3612 3613 #define PARAMETER_FIELDS_DO(macro) \ 3614 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3615 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3616 macro(_index_offset, k, vmSymbols::index_name(), int_signature, false); \ 3617 macro(_executable_offset, k, vmSymbols::executable_name(), executable_signature, false) 3618 3619 void java_lang_reflect_Parameter::compute_offsets() { 3620 InstanceKlass* k = vmClasses::reflect_Parameter_klass(); 3621 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3622 } 3623 3624 #if INCLUDE_CDS 3625 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) { 3626 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3627 } 3628 #endif 3629 3630 Handle java_lang_reflect_Parameter::create(TRAPS) { 3631 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3632 Symbol* name = vmSymbols::java_lang_reflect_Parameter(); 3633 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3634 InstanceKlass* ik = InstanceKlass::cast(k); 3635 // Ensure it is initialized 3636 ik->initialize(CHECK_NH); 3637 return ik->allocate_instance_handle(THREAD); 3638 } 3639 3640 oop java_lang_reflect_Parameter::name(oop param) { 3641 return param->obj_field(_name_offset); 3642 } 3643 3644 void java_lang_reflect_Parameter::set_name(oop param, oop value) { 3645 param->obj_field_put(_name_offset, value); 3646 } 3647 3648 int java_lang_reflect_Parameter::modifiers(oop param) { 3649 return param->int_field(_modifiers_offset); 3650 } 3651 3652 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) { 3653 param->int_field_put(_modifiers_offset, value); 3654 } 3655 3656 int java_lang_reflect_Parameter::index(oop param) { 3657 return param->int_field(_index_offset); 3658 } 3659 3660 void java_lang_reflect_Parameter::set_index(oop param, int value) { 3661 param->int_field_put(_index_offset, value); 3662 } 3663 3664 oop java_lang_reflect_Parameter::executable(oop param) { 3665 return param->obj_field(_executable_offset); 3666 } 3667 3668 void java_lang_reflect_Parameter::set_executable(oop param, oop value) { 3669 param->obj_field_put(_executable_offset, value); 3670 } 3671 3672 // java_lang_Module 3673 3674 int java_lang_Module::_loader_offset; 3675 int java_lang_Module::_name_offset; 3676 int java_lang_Module::_module_entry_offset; 3677 3678 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) { 3679 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3680 return JavaCalls::construct_new_instance(vmClasses::Module_klass(), 3681 vmSymbols::java_lang_module_init_signature(), 3682 loader, module_name, CHECK_NH); 3683 } 3684 3685 #define MODULE_FIELDS_DO(macro) \ 3686 macro(_loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \ 3687 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false) 3688 3689 void java_lang_Module::compute_offsets() { 3690 InstanceKlass* k = vmClasses::Module_klass(); 3691 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3692 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3693 } 3694 3695 #if INCLUDE_CDS 3696 void java_lang_Module::serialize_offsets(SerializeClosure* f) { 3697 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3698 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3699 } 3700 #endif 3701 3702 oop java_lang_Module::loader(oop module) { 3703 return module->obj_field(_loader_offset); 3704 } 3705 3706 void java_lang_Module::set_loader(oop module, oop value) { 3707 module->obj_field_put(_loader_offset, value); 3708 } 3709 3710 oop java_lang_Module::name(oop module) { 3711 return module->obj_field(_name_offset); 3712 } 3713 3714 void java_lang_Module::set_name(oop module, oop value) { 3715 module->obj_field_put(_name_offset, value); 3716 } 3717 3718 ModuleEntry* java_lang_Module::module_entry_raw(oop module) { 3719 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset"); 3720 assert(module != nullptr, "module can't be null"); 3721 assert(oopDesc::is_oop(module), "module must be oop"); 3722 3723 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset); 3724 return module_entry; 3725 } 3726 3727 ModuleEntry* java_lang_Module::module_entry(oop module) { 3728 ModuleEntry* module_entry = module_entry_raw(module); 3729 if (module_entry == nullptr) { 3730 // If the inject field containing the ModuleEntry* is null then return the 3731 // class loader's unnamed module. 3732 oop loader = java_lang_Module::loader(module); 3733 Handle h_loader = Handle(Thread::current(), loader); 3734 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader); 3735 return loader_cld->unnamed_module(); 3736 } 3737 return module_entry; 3738 } 3739 3740 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) { 3741 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset"); 3742 assert(module != nullptr, "module can't be null"); 3743 assert(oopDesc::is_oop(module), "module must be oop"); 3744 module->address_field_put(_module_entry_offset, (address)module_entry); 3745 } 3746 3747 Handle reflect_ConstantPool::create(TRAPS) { 3748 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3749 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass(); 3750 // Ensure it is initialized 3751 k->initialize(CHECK_NH); 3752 return k->allocate_instance_handle(THREAD); 3753 } 3754 3755 3756 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) { 3757 oop mirror = value->pool_holder()->java_mirror(); 3758 // Save the mirror to get back the constant pool. 3759 reflect->obj_field_put(_oop_offset, mirror); 3760 } 3761 3762 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) { 3763 3764 oop mirror = reflect->obj_field(_oop_offset); 3765 Klass* k = java_lang_Class::as_Klass(mirror); 3766 assert(k->is_instance_klass(), "Must be"); 3767 3768 // Get the constant pool back from the klass. Since class redefinition 3769 // merges the new constant pool into the old, this is essentially the 3770 // same constant pool as the original. If constant pool merging is 3771 // no longer done in the future, this will have to change to save 3772 // the original. 3773 return InstanceKlass::cast(k)->constants(); 3774 } 3775 3776 3777 // Support for java_lang_ref_Reference 3778 3779 bool java_lang_ref_Reference::_offsets_initialized; 3780 3781 int java_lang_ref_Reference::_referent_offset; 3782 int java_lang_ref_Reference::_queue_offset; 3783 int java_lang_ref_Reference::_next_offset; 3784 int java_lang_ref_Reference::_discovered_offset; 3785 3786 #define REFERENCE_FIELDS_DO(macro) \ 3787 macro(_referent_offset, k, "referent", object_signature, false); \ 3788 macro(_queue_offset, k, "queue", referencequeue_signature, false); \ 3789 macro(_next_offset, k, "next", reference_signature, false); \ 3790 macro(_discovered_offset, k, "discovered", reference_signature, false); 3791 3792 void java_lang_ref_Reference::compute_offsets() { 3793 if (_offsets_initialized) { 3794 return; 3795 } 3796 _offsets_initialized = true; 3797 InstanceKlass* k = vmClasses::Reference_klass(); 3798 REFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3799 } 3800 3801 #if INCLUDE_CDS 3802 void java_lang_ref_Reference::serialize_offsets(SerializeClosure* f) { 3803 f->do_bool(&_offsets_initialized); 3804 REFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3805 } 3806 #endif 3807 3808 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) { 3809 assert(obj != nullptr, "sanity"); 3810 if (offset != _referent_offset) { 3811 return false; 3812 } 3813 3814 Klass* k = obj->klass(); 3815 if (!k->is_instance_klass()) { 3816 return false; 3817 } 3818 3819 InstanceKlass* ik = InstanceKlass::cast(obj->klass()); 3820 bool is_reference = ik->reference_type() != REF_NONE; 3821 assert(!is_reference || ik->is_subclass_of(vmClasses::Reference_klass()), "sanity"); 3822 return is_reference; 3823 } 3824 3825 int java_lang_boxing_object::_value_offset; 3826 int java_lang_boxing_object::_long_value_offset; 3827 3828 #define BOXING_FIELDS_DO(macro) \ 3829 macro(_value_offset, integerKlass, "value", int_signature, false); \ 3830 macro(_long_value_offset, longKlass, "value", long_signature, false); 3831 3832 void java_lang_boxing_object::compute_offsets() { 3833 InstanceKlass* integerKlass = vmClasses::Integer_klass(); 3834 InstanceKlass* longKlass = vmClasses::Long_klass(); 3835 BOXING_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3836 } 3837 3838 #if INCLUDE_CDS 3839 void java_lang_boxing_object::serialize_offsets(SerializeClosure* f) { 3840 BOXING_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3841 } 3842 #endif 3843 3844 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 3845 Klass* k = vmClasses::box_klass(type); 3846 if (k == nullptr) return nullptr; 3847 InstanceKlass* ik = InstanceKlass::cast(k); 3848 if (!ik->is_initialized()) { 3849 ik->initialize(CHECK_NULL); 3850 } 3851 return ik->allocate_instance(THREAD); 3852 } 3853 3854 3855 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 3856 oop box = initialize_and_allocate(type, CHECK_NULL); 3857 if (box == nullptr) return nullptr; 3858 switch (type) { 3859 case T_BOOLEAN: 3860 box->bool_field_put(_value_offset, value->z); 3861 break; 3862 case T_CHAR: 3863 box->char_field_put(_value_offset, value->c); 3864 break; 3865 case T_FLOAT: 3866 box->float_field_put(_value_offset, value->f); 3867 break; 3868 case T_DOUBLE: 3869 box->double_field_put(_long_value_offset, value->d); 3870 break; 3871 case T_BYTE: 3872 box->byte_field_put(_value_offset, value->b); 3873 break; 3874 case T_SHORT: 3875 box->short_field_put(_value_offset, value->s); 3876 break; 3877 case T_INT: 3878 box->int_field_put(_value_offset, value->i); 3879 break; 3880 case T_LONG: 3881 box->long_field_put(_long_value_offset, value->j); 3882 break; 3883 default: 3884 return nullptr; 3885 } 3886 return box; 3887 } 3888 3889 3890 BasicType java_lang_boxing_object::basic_type(oop box) { 3891 if (box == nullptr) return T_ILLEGAL; 3892 BasicType type = vmClasses::box_klass_type(box->klass()); 3893 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 3894 return T_ILLEGAL; 3895 return type; 3896 } 3897 3898 3899 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 3900 BasicType type = vmClasses::box_klass_type(box->klass()); 3901 switch (type) { 3902 case T_BOOLEAN: 3903 value->z = box->bool_field(_value_offset); 3904 break; 3905 case T_CHAR: 3906 value->c = box->char_field(_value_offset); 3907 break; 3908 case T_FLOAT: 3909 value->f = box->float_field(_value_offset); 3910 break; 3911 case T_DOUBLE: 3912 value->d = box->double_field(_long_value_offset); 3913 break; 3914 case T_BYTE: 3915 value->b = box->byte_field(_value_offset); 3916 break; 3917 case T_SHORT: 3918 value->s = box->short_field(_value_offset); 3919 break; 3920 case T_INT: 3921 value->i = box->int_field(_value_offset); 3922 break; 3923 case T_LONG: 3924 value->j = box->long_field(_long_value_offset); 3925 break; 3926 default: 3927 return T_ILLEGAL; 3928 } // end switch 3929 return type; 3930 } 3931 3932 3933 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 3934 BasicType type = vmClasses::box_klass_type(box->klass()); 3935 switch (type) { 3936 case T_BOOLEAN: 3937 box->bool_field_put(_value_offset, value->z); 3938 break; 3939 case T_CHAR: 3940 box->char_field_put(_value_offset, value->c); 3941 break; 3942 case T_FLOAT: 3943 box->float_field_put(_value_offset, value->f); 3944 break; 3945 case T_DOUBLE: 3946 box->double_field_put(_long_value_offset, value->d); 3947 break; 3948 case T_BYTE: 3949 box->byte_field_put(_value_offset, value->b); 3950 break; 3951 case T_SHORT: 3952 box->short_field_put(_value_offset, value->s); 3953 break; 3954 case T_INT: 3955 box->int_field_put(_value_offset, value->i); 3956 break; 3957 case T_LONG: 3958 box->long_field_put(_long_value_offset, value->j); 3959 break; 3960 default: 3961 return T_ILLEGAL; 3962 } // end switch 3963 return type; 3964 } 3965 3966 3967 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) { 3968 switch (type) { 3969 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break; 3970 case T_CHAR: st->print("%d", value->c); break; 3971 case T_BYTE: st->print("%d", value->b); break; 3972 case T_SHORT: st->print("%d", value->s); break; 3973 case T_INT: st->print("%d", value->i); break; 3974 case T_LONG: st->print(JLONG_FORMAT, value->j); break; 3975 case T_FLOAT: st->print("%f", value->f); break; 3976 case T_DOUBLE: st->print("%lf", value->d); break; 3977 default: st->print("type %d?", type); break; 3978 } 3979 } 3980 3981 3982 // Support for java_lang_ref_SoftReference 3983 // 3984 3985 int java_lang_ref_SoftReference::_timestamp_offset; 3986 int java_lang_ref_SoftReference::_static_clock_offset; 3987 3988 #define SOFTREFERENCE_FIELDS_DO(macro) \ 3989 macro(_timestamp_offset, k, "timestamp", long_signature, false); \ 3990 macro(_static_clock_offset, k, "clock", long_signature, true) 3991 3992 void java_lang_ref_SoftReference::compute_offsets() { 3993 InstanceKlass* k = vmClasses::SoftReference_klass(); 3994 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3995 } 3996 3997 #if INCLUDE_CDS 3998 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) { 3999 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4000 } 4001 #endif 4002 4003 jlong java_lang_ref_SoftReference::timestamp(oop ref) { 4004 return ref->long_field(_timestamp_offset); 4005 } 4006 4007 jlong java_lang_ref_SoftReference::clock() { 4008 InstanceKlass* ik = vmClasses::SoftReference_klass(); 4009 oop base = ik->static_field_base_raw(); 4010 return base->long_field(_static_clock_offset); 4011 } 4012 4013 void java_lang_ref_SoftReference::set_clock(jlong value) { 4014 InstanceKlass* ik = vmClasses::SoftReference_klass(); 4015 oop base = ik->static_field_base_raw(); 4016 base->long_field_put(_static_clock_offset, value); 4017 } 4018 4019 // Support for java_lang_invoke_DirectMethodHandle 4020 4021 int java_lang_invoke_DirectMethodHandle::_member_offset; 4022 4023 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) { 4024 oop member_name = nullptr; 4025 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh), 4026 "a DirectMethodHandle oop is expected"); 4027 return dmh->obj_field(_member_offset); 4028 } 4029 4030 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \ 4031 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false) 4032 4033 void java_lang_invoke_DirectMethodHandle::compute_offsets() { 4034 InstanceKlass* k = vmClasses::DirectMethodHandle_klass(); 4035 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4036 } 4037 4038 #if INCLUDE_CDS 4039 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) { 4040 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4041 } 4042 #endif 4043 4044 // Support for java_lang_invoke_MethodHandle 4045 4046 int java_lang_invoke_MethodHandle::_type_offset; 4047 int java_lang_invoke_MethodHandle::_form_offset; 4048 4049 int java_lang_invoke_MemberName::_clazz_offset; 4050 int java_lang_invoke_MemberName::_name_offset; 4051 int java_lang_invoke_MemberName::_type_offset; 4052 int java_lang_invoke_MemberName::_flags_offset; 4053 int java_lang_invoke_MemberName::_method_offset; 4054 int java_lang_invoke_MemberName::_vmindex_offset; 4055 4056 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset; 4057 int java_lang_invoke_ResolvedMethodName::_vmholder_offset; 4058 4059 int java_lang_invoke_LambdaForm::_vmentry_offset; 4060 4061 #define METHODHANDLE_FIELDS_DO(macro) \ 4062 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \ 4063 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false) 4064 4065 void java_lang_invoke_MethodHandle::compute_offsets() { 4066 InstanceKlass* k = vmClasses::MethodHandle_klass(); 4067 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4068 } 4069 4070 #if INCLUDE_CDS 4071 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) { 4072 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4073 } 4074 #endif 4075 4076 #define MEMBERNAME_FIELDS_DO(macro) \ 4077 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 4078 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 4079 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \ 4080 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \ 4081 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false) 4082 4083 void java_lang_invoke_MemberName::compute_offsets() { 4084 InstanceKlass* k = vmClasses::MemberName_klass(); 4085 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4086 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4087 } 4088 4089 #if INCLUDE_CDS 4090 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) { 4091 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4092 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4093 } 4094 #endif 4095 4096 #define RESOLVEDMETHOD_FIELDS_DO(macro) \ 4097 macro(_vmholder_offset, k, "vmholder", class_signature, false) 4098 4099 void java_lang_invoke_ResolvedMethodName::compute_offsets() { 4100 InstanceKlass* k = vmClasses::ResolvedMethodName_klass(); 4101 assert(k != nullptr, "jdk mismatch"); 4102 RESOLVEDMETHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4103 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4104 } 4105 4106 #if INCLUDE_CDS 4107 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) { 4108 RESOLVEDMETHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4109 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4110 } 4111 #endif 4112 4113 #define LAMBDAFORM_FIELDS_DO(macro) \ 4114 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false) 4115 4116 void java_lang_invoke_LambdaForm::compute_offsets() { 4117 InstanceKlass* k = vmClasses::LambdaForm_klass(); 4118 assert (k != nullptr, "jdk mismatch"); 4119 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4120 } 4121 4122 #if INCLUDE_CDS 4123 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) { 4124 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4125 } 4126 #endif 4127 4128 bool java_lang_invoke_LambdaForm::is_instance(oop obj) { 4129 return obj != nullptr && is_subclass(obj->klass()); 4130 } 4131 4132 int jdk_internal_foreign_abi_NativeEntryPoint::_method_type_offset; 4133 int jdk_internal_foreign_abi_NativeEntryPoint::_downcall_stub_address_offset; 4134 4135 #define NEP_FIELDS_DO(macro) \ 4136 macro(_method_type_offset, k, "methodType", java_lang_invoke_MethodType_signature, false); \ 4137 macro(_downcall_stub_address_offset, k, "downcallStubAddress", long_signature, false); 4138 4139 bool jdk_internal_foreign_abi_NativeEntryPoint::is_instance(oop obj) { 4140 return obj != nullptr && is_subclass(obj->klass()); 4141 } 4142 4143 void jdk_internal_foreign_abi_NativeEntryPoint::compute_offsets() { 4144 InstanceKlass* k = vmClasses::NativeEntryPoint_klass(); 4145 NEP_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4146 } 4147 4148 #if INCLUDE_CDS 4149 void jdk_internal_foreign_abi_NativeEntryPoint::serialize_offsets(SerializeClosure* f) { 4150 NEP_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4151 } 4152 #endif 4153 4154 oop jdk_internal_foreign_abi_NativeEntryPoint::method_type(oop entry) { 4155 return entry->obj_field(_method_type_offset); 4156 } 4157 4158 jlong jdk_internal_foreign_abi_NativeEntryPoint::downcall_stub_address(oop entry) { 4159 return entry->long_field(_downcall_stub_address_offset); 4160 } 4161 4162 int jdk_internal_foreign_abi_ABIDescriptor::_inputStorage_offset; 4163 int jdk_internal_foreign_abi_ABIDescriptor::_outputStorage_offset; 4164 int jdk_internal_foreign_abi_ABIDescriptor::_volatileStorage_offset; 4165 int jdk_internal_foreign_abi_ABIDescriptor::_stackAlignment_offset; 4166 int jdk_internal_foreign_abi_ABIDescriptor::_shadowSpace_offset; 4167 int jdk_internal_foreign_abi_ABIDescriptor::_scratch1_offset; 4168 int jdk_internal_foreign_abi_ABIDescriptor::_scratch2_offset; 4169 4170 #define ABIDescriptor_FIELDS_DO(macro) \ 4171 macro(_inputStorage_offset, k, "inputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \ 4172 macro(_outputStorage_offset, k, "outputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \ 4173 macro(_volatileStorage_offset, k, "volatileStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \ 4174 macro(_stackAlignment_offset, k, "stackAlignment", int_signature, false); \ 4175 macro(_shadowSpace_offset, k, "shadowSpace", int_signature, false); \ 4176 macro(_scratch1_offset, k, "scratch1", jdk_internal_foreign_abi_VMStorage_signature, false); \ 4177 macro(_scratch2_offset, k, "scratch2", jdk_internal_foreign_abi_VMStorage_signature, false); 4178 4179 bool jdk_internal_foreign_abi_ABIDescriptor::is_instance(oop obj) { 4180 return obj != nullptr && is_subclass(obj->klass()); 4181 } 4182 4183 void jdk_internal_foreign_abi_ABIDescriptor::compute_offsets() { 4184 InstanceKlass* k = vmClasses::ABIDescriptor_klass(); 4185 ABIDescriptor_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4186 } 4187 4188 #if INCLUDE_CDS 4189 void jdk_internal_foreign_abi_ABIDescriptor::serialize_offsets(SerializeClosure* f) { 4190 ABIDescriptor_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4191 } 4192 #endif 4193 4194 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::inputStorage(oop entry) { 4195 return oop_cast<objArrayOop>(entry->obj_field(_inputStorage_offset)); 4196 } 4197 4198 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::outputStorage(oop entry) { 4199 return oop_cast<objArrayOop>(entry->obj_field(_outputStorage_offset)); 4200 } 4201 4202 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::volatileStorage(oop entry) { 4203 return oop_cast<objArrayOop>(entry->obj_field(_volatileStorage_offset)); 4204 } 4205 4206 jint jdk_internal_foreign_abi_ABIDescriptor::stackAlignment(oop entry) { 4207 return entry->int_field(_stackAlignment_offset); 4208 } 4209 4210 jint jdk_internal_foreign_abi_ABIDescriptor::shadowSpace(oop entry) { 4211 return entry->int_field(_shadowSpace_offset); 4212 } 4213 4214 oop jdk_internal_foreign_abi_ABIDescriptor::scratch1(oop entry) { 4215 return entry->obj_field(_scratch1_offset); 4216 } 4217 4218 oop jdk_internal_foreign_abi_ABIDescriptor::scratch2(oop entry) { 4219 return entry->obj_field(_scratch2_offset); 4220 } 4221 4222 int jdk_internal_foreign_abi_VMStorage::_type_offset; 4223 int jdk_internal_foreign_abi_VMStorage::_indexOrOffset_offset; 4224 int jdk_internal_foreign_abi_VMStorage::_segmentMaskOrSize_offset; 4225 int jdk_internal_foreign_abi_VMStorage::_debugName_offset; 4226 4227 #define VMStorage_FIELDS_DO(macro) \ 4228 macro(_type_offset, k, "type", byte_signature, false); \ 4229 macro(_indexOrOffset_offset, k, "indexOrOffset", int_signature, false); \ 4230 macro(_segmentMaskOrSize_offset, k, "segmentMaskOrSize", short_signature, false); \ 4231 macro(_debugName_offset, k, "debugName", string_signature, false); \ 4232 4233 bool jdk_internal_foreign_abi_VMStorage::is_instance(oop obj) { 4234 return obj != nullptr && is_subclass(obj->klass()); 4235 } 4236 4237 void jdk_internal_foreign_abi_VMStorage::compute_offsets() { 4238 InstanceKlass* k = vmClasses::VMStorage_klass(); 4239 VMStorage_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4240 } 4241 4242 #if INCLUDE_CDS 4243 void jdk_internal_foreign_abi_VMStorage::serialize_offsets(SerializeClosure* f) { 4244 VMStorage_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4245 } 4246 #endif 4247 4248 jbyte jdk_internal_foreign_abi_VMStorage::type(oop entry) { 4249 return entry->byte_field(_type_offset); 4250 } 4251 4252 jint jdk_internal_foreign_abi_VMStorage::index_or_offset(oop entry) { 4253 return entry->int_field(_indexOrOffset_offset); 4254 } 4255 4256 jshort jdk_internal_foreign_abi_VMStorage::segment_mask_or_size(oop entry) { 4257 return entry->short_field(_segmentMaskOrSize_offset); 4258 } 4259 4260 oop jdk_internal_foreign_abi_VMStorage::debugName(oop entry) { 4261 return entry->obj_field(_debugName_offset); 4262 } 4263 4264 int jdk_internal_foreign_abi_CallConv::_argRegs_offset; 4265 int jdk_internal_foreign_abi_CallConv::_retRegs_offset; 4266 4267 #define CallConv_FIELDS_DO(macro) \ 4268 macro(_argRegs_offset, k, "argRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \ 4269 macro(_retRegs_offset, k, "retRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \ 4270 4271 bool jdk_internal_foreign_abi_CallConv::is_instance(oop obj) { 4272 return obj != nullptr && is_subclass(obj->klass()); 4273 } 4274 4275 void jdk_internal_foreign_abi_CallConv::compute_offsets() { 4276 InstanceKlass* k = vmClasses::CallConv_klass(); 4277 CallConv_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4278 } 4279 4280 #if INCLUDE_CDS 4281 void jdk_internal_foreign_abi_CallConv::serialize_offsets(SerializeClosure* f) { 4282 CallConv_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4283 } 4284 #endif 4285 4286 objArrayOop jdk_internal_foreign_abi_CallConv::argRegs(oop entry) { 4287 return oop_cast<objArrayOop>(entry->obj_field(_argRegs_offset)); 4288 } 4289 4290 objArrayOop jdk_internal_foreign_abi_CallConv::retRegs(oop entry) { 4291 return oop_cast<objArrayOop>(entry->obj_field(_retRegs_offset)); 4292 } 4293 4294 oop java_lang_invoke_MethodHandle::type(oop mh) { 4295 return mh->obj_field(_type_offset); 4296 } 4297 4298 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) { 4299 mh->obj_field_put(_type_offset, mtype); 4300 } 4301 4302 oop java_lang_invoke_MethodHandle::form(oop mh) { 4303 assert(_form_offset != 0, ""); 4304 return mh->obj_field(_form_offset); 4305 } 4306 4307 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) { 4308 assert(_form_offset != 0, ""); 4309 mh->obj_field_put(_form_offset, lform); 4310 } 4311 4312 /// MemberName accessors 4313 4314 oop java_lang_invoke_MemberName::clazz(oop mname) { 4315 assert(is_instance(mname), "wrong type"); 4316 return mname->obj_field(_clazz_offset); 4317 } 4318 4319 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) { 4320 assert(is_instance(mname), "wrong type"); 4321 mname->obj_field_put(_clazz_offset, clazz); 4322 } 4323 4324 oop java_lang_invoke_MemberName::name(oop mname) { 4325 assert(is_instance(mname), "wrong type"); 4326 return mname->obj_field(_name_offset); 4327 } 4328 4329 void java_lang_invoke_MemberName::set_name(oop mname, oop name) { 4330 assert(is_instance(mname), "wrong type"); 4331 mname->obj_field_put(_name_offset, name); 4332 } 4333 4334 oop java_lang_invoke_MemberName::type(oop mname) { 4335 assert(is_instance(mname), "wrong type"); 4336 return mname->obj_field(_type_offset); 4337 } 4338 4339 void java_lang_invoke_MemberName::set_type(oop mname, oop type) { 4340 assert(is_instance(mname), "wrong type"); 4341 mname->obj_field_put(_type_offset, type); 4342 } 4343 4344 int java_lang_invoke_MemberName::flags(oop mname) { 4345 assert(is_instance(mname), "wrong type"); 4346 return mname->int_field(_flags_offset); 4347 } 4348 4349 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) { 4350 assert(is_instance(mname), "wrong type"); 4351 mname->int_field_put(_flags_offset, flags); 4352 } 4353 4354 4355 // Return vmtarget from ResolvedMethodName method field through indirection 4356 Method* java_lang_invoke_MemberName::vmtarget(oop mname) { 4357 assert(is_instance(mname), "wrong type"); 4358 oop method = mname->obj_field(_method_offset); 4359 return method == nullptr ? nullptr : java_lang_invoke_ResolvedMethodName::vmtarget(method); 4360 } 4361 4362 bool java_lang_invoke_MemberName::is_method(oop mname) { 4363 assert(is_instance(mname), "must be MemberName"); 4364 return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0; 4365 } 4366 4367 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) { 4368 assert(is_instance(mname), "wrong type"); 4369 mname->obj_field_put(_method_offset, resolved_method); 4370 } 4371 4372 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) { 4373 assert(is_instance(mname), "wrong type"); 4374 return (intptr_t) mname->address_field(_vmindex_offset); 4375 } 4376 4377 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) { 4378 assert(is_instance(mname), "wrong type"); 4379 mname->address_field_put(_vmindex_offset, (address) index); 4380 } 4381 4382 4383 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) { 4384 assert(is_instance(resolved_method), "wrong type"); 4385 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset); 4386 assert(m->is_method(), "must be"); 4387 return m; 4388 } 4389 4390 // Used by redefinition to change Method* to new Method* with same hash (name, signature) 4391 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) { 4392 assert(is_instance(resolved_method), "wrong type"); 4393 resolved_method->address_field_put(_vmtarget_offset, (address)m); 4394 } 4395 4396 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) { 4397 assert(is_instance(resolved_method), "wrong type"); 4398 resolved_method->obj_field_put(_vmholder_offset, holder); 4399 } 4400 4401 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) { 4402 const Method* method = m(); 4403 4404 // lookup ResolvedMethod oop in the table, or create a new one and intern it 4405 oop resolved_method = ResolvedMethodTable::find_method(method); 4406 if (resolved_method != nullptr) { 4407 return resolved_method; 4408 } 4409 4410 InstanceKlass* k = vmClasses::ResolvedMethodName_klass(); 4411 if (!k->is_initialized()) { 4412 k->initialize(CHECK_NULL); 4413 } 4414 4415 oop new_resolved_method = k->allocate_instance(CHECK_NULL); 4416 4417 NoSafepointVerifier nsv; 4418 4419 if (method->is_old()) { 4420 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() : 4421 method->get_new_method(); 4422 } 4423 4424 InstanceKlass* holder = method->method_holder(); 4425 4426 set_vmtarget(new_resolved_method, const_cast<Method*>(method)); 4427 // Add a reference to the loader (actually mirror because hidden classes may not have 4428 // distinct loaders) to ensure the metadata is kept alive. 4429 // This mirror may be different than the one in clazz field. 4430 set_vmholder(new_resolved_method, holder->java_mirror()); 4431 4432 // Set flag in class to indicate this InstanceKlass has entries in the table 4433 // to avoid walking table during redefinition if none of the redefined classes 4434 // have any membernames in the table. 4435 holder->set_has_resolved_methods(); 4436 4437 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method)); 4438 } 4439 4440 oop java_lang_invoke_LambdaForm::vmentry(oop lform) { 4441 assert(is_instance(lform), "wrong type"); 4442 return lform->obj_field(_vmentry_offset); 4443 } 4444 4445 4446 // Support for java_lang_invoke_MethodType 4447 4448 int java_lang_invoke_MethodType::_rtype_offset; 4449 int java_lang_invoke_MethodType::_ptypes_offset; 4450 4451 #define METHODTYPE_FIELDS_DO(macro) \ 4452 macro(_rtype_offset, k, "rtype", class_signature, false); \ 4453 macro(_ptypes_offset, k, "ptypes", class_array_signature, false) 4454 4455 void java_lang_invoke_MethodType::compute_offsets() { 4456 InstanceKlass* k = vmClasses::MethodType_klass(); 4457 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4458 } 4459 4460 #if INCLUDE_CDS 4461 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) { 4462 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4463 } 4464 #endif 4465 4466 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) { 4467 st->print("("); 4468 objArrayOop pts = ptypes(mt); 4469 if (pts != nullptr) { 4470 for (int i = 0, limit = pts->length(); i < limit; i++) { 4471 java_lang_Class::print_signature(pts->obj_at(i), st); 4472 } 4473 } else { 4474 st->print("null"); 4475 } 4476 st->print(")"); 4477 oop rt = rtype(mt); 4478 if (rt != nullptr) { 4479 java_lang_Class::print_signature(rt, st); 4480 } else { 4481 st->print("null"); 4482 } 4483 } 4484 4485 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) { 4486 ResourceMark rm; 4487 stringStream buffer(128); 4488 print_signature(mt, &buffer); 4489 const char* sigstr = buffer.base(); 4490 int siglen = (int) buffer.size(); 4491 Symbol *name; 4492 if (!intern_if_not_found) { 4493 name = SymbolTable::probe(sigstr, siglen); 4494 } else { 4495 name = SymbolTable::new_symbol(sigstr, siglen); 4496 } 4497 return name; 4498 } 4499 4500 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) { 4501 if (mt1 == mt2) 4502 return true; 4503 if (rtype(mt1) != rtype(mt2)) 4504 return false; 4505 if (ptype_count(mt1) != ptype_count(mt2)) 4506 return false; 4507 for (int i = ptype_count(mt1) - 1; i >= 0; i--) { 4508 if (ptype(mt1, i) != ptype(mt2, i)) 4509 return false; 4510 } 4511 return true; 4512 } 4513 4514 oop java_lang_invoke_MethodType::rtype(oop mt) { 4515 assert(is_instance(mt), "must be a MethodType"); 4516 return mt->obj_field(_rtype_offset); 4517 } 4518 4519 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) { 4520 assert(is_instance(mt), "must be a MethodType"); 4521 return (objArrayOop) mt->obj_field(_ptypes_offset); 4522 } 4523 4524 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) { 4525 return ptypes(mt)->obj_at(idx); 4526 } 4527 4528 int java_lang_invoke_MethodType::ptype_count(oop mt) { 4529 return ptypes(mt)->length(); 4530 } 4531 4532 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) { 4533 objArrayOop pts = ptypes(mt); 4534 int count = pts->length(); 4535 int slots = 0; 4536 for (int i = 0; i < count; i++) { 4537 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i)); 4538 slots += type2size[bt]; 4539 } 4540 return slots; 4541 } 4542 4543 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) { 4544 BasicType bt = java_lang_Class::as_BasicType(rtype(mt)); 4545 return type2size[bt]; 4546 } 4547 4548 4549 // Support for java_lang_invoke_CallSite 4550 4551 int java_lang_invoke_CallSite::_target_offset; 4552 int java_lang_invoke_CallSite::_context_offset; 4553 4554 #define CALLSITE_FIELDS_DO(macro) \ 4555 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \ 4556 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false) 4557 4558 void java_lang_invoke_CallSite::compute_offsets() { 4559 InstanceKlass* k = vmClasses::CallSite_klass(); 4560 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4561 } 4562 4563 #if INCLUDE_CDS 4564 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) { 4565 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4566 } 4567 #endif 4568 4569 oop java_lang_invoke_CallSite::context_no_keepalive(oop call_site) { 4570 assert(java_lang_invoke_CallSite::is_instance(call_site), ""); 4571 4572 oop dep_oop = call_site->obj_field_access<AS_NO_KEEPALIVE>(_context_offset); 4573 return dep_oop; 4574 } 4575 4576 // Support for java_lang_invoke_ConstantCallSite 4577 4578 int java_lang_invoke_ConstantCallSite::_is_frozen_offset; 4579 4580 #define CONSTANTCALLSITE_FIELDS_DO(macro) \ 4581 macro(_is_frozen_offset, k, "isFrozen", bool_signature, false) 4582 4583 void java_lang_invoke_ConstantCallSite::compute_offsets() { 4584 InstanceKlass* k = vmClasses::ConstantCallSite_klass(); 4585 CONSTANTCALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4586 } 4587 4588 #if INCLUDE_CDS 4589 void java_lang_invoke_ConstantCallSite::serialize_offsets(SerializeClosure* f) { 4590 CONSTANTCALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4591 } 4592 #endif 4593 4594 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext 4595 4596 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset; 4597 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_last_cleanup_offset; 4598 4599 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() { 4600 InstanceKlass* k = vmClasses::Context_klass(); 4601 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4602 } 4603 4604 #if INCLUDE_CDS 4605 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) { 4606 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4607 } 4608 #endif 4609 4610 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) { 4611 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), ""); 4612 nmethodBucket* volatile* vmdeps_addr = call_site->field_addr<nmethodBucket* volatile>(_vmdependencies_offset); 4613 volatile uint64_t* last_cleanup_addr = call_site->field_addr<volatile uint64_t>(_last_cleanup_offset); 4614 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr); 4615 return dep_ctx; 4616 } 4617 4618 // Support for java_security_AccessControlContext 4619 4620 int java_security_AccessControlContext::_context_offset; 4621 int java_security_AccessControlContext::_privilegedContext_offset; 4622 int java_security_AccessControlContext::_isPrivileged_offset; 4623 int java_security_AccessControlContext::_isAuthorized_offset; 4624 4625 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \ 4626 macro(_context_offset, k, "context", protectiondomain_signature, false); \ 4627 macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \ 4628 macro(_isPrivileged_offset, k, "isPrivileged", bool_signature, false); \ 4629 macro(_isAuthorized_offset, k, "isAuthorized", bool_signature, false) 4630 4631 void java_security_AccessControlContext::compute_offsets() { 4632 assert(_isPrivileged_offset == 0, "offsets should be initialized only once"); 4633 InstanceKlass* k = vmClasses::AccessControlContext_klass(); 4634 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4635 } 4636 4637 #if INCLUDE_CDS 4638 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) { 4639 ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4640 } 4641 #endif 4642 4643 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) { 4644 assert(_isPrivileged_offset != 0, "offsets should have been initialized"); 4645 assert(_isAuthorized_offset != 0, "offsets should have been initialized"); 4646 // Ensure klass is initialized 4647 vmClasses::AccessControlContext_klass()->initialize(CHECK_NULL); 4648 // Allocate result 4649 oop result = vmClasses::AccessControlContext_klass()->allocate_instance(CHECK_NULL); 4650 // Fill in values 4651 result->obj_field_put(_context_offset, context()); 4652 result->obj_field_put(_privilegedContext_offset, privileged_context()); 4653 result->bool_field_put(_isPrivileged_offset, isPrivileged); 4654 result->bool_field_put(_isAuthorized_offset, true); 4655 return result; 4656 } 4657 4658 4659 // Support for java_lang_ClassLoader 4660 4661 int java_lang_ClassLoader::_loader_data_offset; 4662 int java_lang_ClassLoader::_parallelCapable_offset; 4663 int java_lang_ClassLoader::_name_offset; 4664 int java_lang_ClassLoader::_nameAndId_offset; 4665 int java_lang_ClassLoader::_unnamedModule_offset; 4666 int java_lang_ClassLoader::_parent_offset; 4667 4668 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) { 4669 assert(loader != nullptr, "loader must not be null"); 4670 assert(oopDesc::is_oop(loader), "loader must be oop"); 4671 return Atomic::load_acquire(loader->field_addr<ClassLoaderData*>(_loader_data_offset)); 4672 } 4673 4674 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) { 4675 assert(loader != nullptr, "loader must not be null"); 4676 assert(oopDesc::is_oop(loader), "loader must be oop"); 4677 return *loader->field_addr<ClassLoaderData*>(_loader_data_offset); 4678 } 4679 4680 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) { 4681 assert(loader != nullptr, "loader must not be null"); 4682 assert(oopDesc::is_oop(loader), "loader must be oop"); 4683 Atomic::release_store(loader->field_addr<ClassLoaderData*>(_loader_data_offset), new_data); 4684 } 4685 4686 #define CLASSLOADER_FIELDS_DO(macro) \ 4687 macro(_parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \ 4688 macro(_name_offset, k1, vmSymbols::name_name(), string_signature, false); \ 4689 macro(_nameAndId_offset, k1, "nameAndId", string_signature, false); \ 4690 macro(_unnamedModule_offset, k1, "unnamedModule", module_signature, false); \ 4691 macro(_parent_offset, k1, "parent", classloader_signature, false) 4692 4693 void java_lang_ClassLoader::compute_offsets() { 4694 InstanceKlass* k1 = vmClasses::ClassLoader_klass(); 4695 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4696 4697 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4698 } 4699 4700 #if INCLUDE_CDS 4701 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) { 4702 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4703 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4704 } 4705 #endif 4706 4707 oop java_lang_ClassLoader::parent(oop loader) { 4708 assert(is_instance(loader), "loader must be oop"); 4709 return loader->obj_field(_parent_offset); 4710 } 4711 4712 oop java_lang_ClassLoader::parent_no_keepalive(oop loader) { 4713 assert(is_instance(loader), "loader must be oop"); 4714 return loader->obj_field_access<AS_NO_KEEPALIVE>(_parent_offset); 4715 } 4716 4717 // Returns the name field of this class loader. If the name field has not 4718 // been set, null will be returned. 4719 oop java_lang_ClassLoader::name(oop loader) { 4720 assert(is_instance(loader), "loader must be oop"); 4721 return loader->obj_field(_name_offset); 4722 } 4723 4724 // Returns the nameAndId field of this class loader. The format is 4725 // as follows: 4726 // If the defining loader has a name explicitly set then '<loader-name>' @<id> 4727 // If the defining loader has no name then <qualified-class-name> @<id> 4728 // If built-in loader, then omit '@<id>' as there is only one instance. 4729 // Use ClassLoader::loader_name_id() to obtain this String as a char*. 4730 oop java_lang_ClassLoader::nameAndId(oop loader) { 4731 assert(is_instance(loader), "loader must be oop"); 4732 return loader->obj_field(_nameAndId_offset); 4733 } 4734 4735 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) { 4736 assert(is_instance(loader), "loader must be oop"); 4737 assert(cl == nullptr || is_instance(cl), "cl argument must be oop"); 4738 oop acl = loader; 4739 debug_only(jint loop_count = 0); 4740 // This loop taken verbatim from ClassLoader.java: 4741 do { 4742 acl = parent(acl); 4743 if (cl == acl) { 4744 return true; 4745 } 4746 assert(++loop_count > 0, "loop_count overflow"); 4747 } while (acl != nullptr); 4748 return false; 4749 } 4750 4751 bool java_lang_ClassLoader::is_instance(oop obj) { 4752 return obj != nullptr && is_subclass(obj->klass()); 4753 } 4754 4755 4756 // For class loader classes, parallelCapable defined 4757 // based on non-null field 4758 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it 4759 bool java_lang_ClassLoader::parallelCapable(oop class_loader) { 4760 assert(_parallelCapable_offset != 0, "offsets should have been initialized"); 4761 return (class_loader->obj_field(_parallelCapable_offset) != nullptr); 4762 } 4763 4764 bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 4765 // Fix for 4474172; see evaluation for more details 4766 loader = non_reflection_class_loader(loader); 4767 4768 oop cl = SystemDictionary::java_system_loader(); 4769 while(cl != nullptr) { 4770 if (cl == loader) return true; 4771 cl = parent(cl); 4772 } 4773 return false; 4774 } 4775 4776 // Return true if this is one of the class loaders associated with 4777 // the generated bytecodes for serialization constructor returned 4778 // by sun.reflect.ReflectionFactory::newConstructorForSerialization 4779 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) { 4780 if (loader != nullptr) { 4781 Klass* delegating_cl_class = vmClasses::reflect_DelegatingClassLoader_klass(); 4782 // This might be null in non-1.4 JDKs 4783 return (delegating_cl_class != nullptr && loader->is_a(delegating_cl_class)); 4784 } 4785 return false; 4786 } 4787 4788 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) { 4789 // See whether this is one of the class loaders associated with 4790 // the generated bytecodes for reflection, and if so, "magically" 4791 // delegate to its parent to prevent class loading from occurring 4792 // in places where applications using reflection didn't expect it. 4793 if (is_reflection_class_loader(loader)) { 4794 return parent(loader); 4795 } 4796 return loader; 4797 } 4798 4799 oop java_lang_ClassLoader::unnamedModule(oop loader) { 4800 assert(is_instance(loader), "loader must be oop"); 4801 return loader->obj_field(_unnamedModule_offset); 4802 } 4803 4804 // Support for java_lang_System 4805 // 4806 4807 int java_lang_System::_static_in_offset; 4808 int java_lang_System::_static_out_offset; 4809 int java_lang_System::_static_err_offset; 4810 int java_lang_System::_static_security_offset; 4811 int java_lang_System::_static_allow_security_offset; 4812 int java_lang_System::_static_never_offset; 4813 4814 #define SYSTEM_FIELDS_DO(macro) \ 4815 macro(_static_in_offset, k, "in", input_stream_signature, true); \ 4816 macro(_static_out_offset, k, "out", print_stream_signature, true); \ 4817 macro(_static_err_offset, k, "err", print_stream_signature, true); \ 4818 macro(_static_security_offset, k, "security", security_manager_signature, true); \ 4819 macro(_static_allow_security_offset, k, "allowSecurityManager", int_signature, true); \ 4820 macro(_static_never_offset, k, "NEVER", int_signature, true) 4821 4822 void java_lang_System::compute_offsets() { 4823 InstanceKlass* k = vmClasses::System_klass(); 4824 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4825 } 4826 4827 // This field tells us that a security manager can never be installed so we 4828 // can completely skip populating the ProtectionDomainCacheTable. 4829 bool java_lang_System::allow_security_manager() { 4830 static int initialized = false; 4831 static bool allowed = true; // default 4832 if (!initialized) { 4833 oop base = vmClasses::System_klass()->static_field_base_raw(); 4834 int never = base->int_field(_static_never_offset); 4835 allowed = (base->int_field(_static_allow_security_offset) != never); 4836 initialized = true; 4837 } 4838 return allowed; 4839 } 4840 4841 // This field tells us that a security manager is installed. 4842 bool java_lang_System::has_security_manager() { 4843 oop base = vmClasses::System_klass()->static_field_base_raw(); 4844 return base->obj_field(_static_security_offset) != nullptr; 4845 } 4846 4847 #if INCLUDE_CDS 4848 void java_lang_System::serialize_offsets(SerializeClosure* f) { 4849 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4850 } 4851 #endif 4852 4853 // Support for jdk_internal_misc_UnsafeConstants 4854 // 4855 class UnsafeConstantsFixup : public FieldClosure { 4856 private: 4857 int _address_size; 4858 int _page_size; 4859 bool _big_endian; 4860 bool _use_unaligned_access; 4861 int _data_cache_line_flush_size; 4862 public: 4863 UnsafeConstantsFixup() { 4864 // round up values for all static final fields 4865 _address_size = sizeof(void*); 4866 _page_size = AIX_ONLY(sysconf(_SC_PAGESIZE)) NOT_AIX((int)os::vm_page_size()); 4867 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true); 4868 _use_unaligned_access = UseUnalignedAccesses; 4869 _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size(); 4870 } 4871 4872 void do_field(fieldDescriptor* fd) { 4873 oop mirror = fd->field_holder()->java_mirror(); 4874 assert(mirror != nullptr, "UnsafeConstants must have mirror already"); 4875 assert(fd->field_holder() == vmClasses::UnsafeConstants_klass(), "Should be UnsafeConstants"); 4876 assert(fd->is_final(), "fields of UnsafeConstants must be final"); 4877 assert(fd->is_static(), "fields of UnsafeConstants must be static"); 4878 if (fd->name() == vmSymbols::address_size_name()) { 4879 mirror->int_field_put(fd->offset(), _address_size); 4880 } else if (fd->name() == vmSymbols::page_size_name()) { 4881 mirror->int_field_put(fd->offset(), _page_size); 4882 } else if (fd->name() == vmSymbols::big_endian_name()) { 4883 mirror->bool_field_put(fd->offset(), _big_endian); 4884 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) { 4885 mirror->bool_field_put(fd->offset(), _use_unaligned_access); 4886 } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) { 4887 mirror->int_field_put(fd->offset(), _data_cache_line_flush_size); 4888 } else { 4889 assert(false, "unexpected UnsafeConstants field"); 4890 } 4891 } 4892 }; 4893 4894 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() { 4895 UnsafeConstantsFixup fixup; 4896 vmClasses::UnsafeConstants_klass()->do_local_static_fields(&fixup); 4897 } 4898 4899 4900 // java_lang_StackTraceElement 4901 4902 int java_lang_StackTraceElement::_methodName_offset; 4903 int java_lang_StackTraceElement::_fileName_offset; 4904 int java_lang_StackTraceElement::_lineNumber_offset; 4905 int java_lang_StackTraceElement::_moduleName_offset; 4906 int java_lang_StackTraceElement::_moduleVersion_offset; 4907 int java_lang_StackTraceElement::_classLoaderName_offset; 4908 int java_lang_StackTraceElement::_declaringClass_offset; 4909 int java_lang_StackTraceElement::_declaringClassObject_offset; 4910 4911 #define STACKTRACEELEMENT_FIELDS_DO(macro) \ 4912 macro(_declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \ 4913 macro(_classLoaderName_offset, k, "classLoaderName", string_signature, false); \ 4914 macro(_moduleName_offset, k, "moduleName", string_signature, false); \ 4915 macro(_moduleVersion_offset, k, "moduleVersion", string_signature, false); \ 4916 macro(_declaringClass_offset, k, "declaringClass", string_signature, false); \ 4917 macro(_methodName_offset, k, "methodName", string_signature, false); \ 4918 macro(_fileName_offset, k, "fileName", string_signature, false); \ 4919 macro(_lineNumber_offset, k, "lineNumber", int_signature, false) 4920 4921 // Support for java_lang_StackTraceElement 4922 void java_lang_StackTraceElement::compute_offsets() { 4923 InstanceKlass* k = vmClasses::StackTraceElement_klass(); 4924 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4925 } 4926 4927 #if INCLUDE_CDS 4928 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) { 4929 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4930 } 4931 #endif 4932 4933 void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 4934 element->obj_field_put(_fileName_offset, value); 4935 } 4936 4937 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 4938 element->obj_field_put(_declaringClass_offset, value); 4939 } 4940 4941 void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 4942 element->obj_field_put(_methodName_offset, value); 4943 } 4944 4945 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 4946 element->int_field_put(_lineNumber_offset, value); 4947 } 4948 4949 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) { 4950 element->obj_field_put(_moduleName_offset, value); 4951 } 4952 4953 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) { 4954 element->obj_field_put(_moduleVersion_offset, value); 4955 } 4956 4957 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) { 4958 element->obj_field_put(_classLoaderName_offset, value); 4959 } 4960 4961 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) { 4962 element->obj_field_put(_declaringClassObject_offset, value); 4963 } 4964 4965 4966 // java_lang_AssertionStatusDirectives 4967 4968 int java_lang_AssertionStatusDirectives::_classes_offset; 4969 int java_lang_AssertionStatusDirectives::_classEnabled_offset; 4970 int java_lang_AssertionStatusDirectives::_packages_offset; 4971 int java_lang_AssertionStatusDirectives::_packageEnabled_offset; 4972 int java_lang_AssertionStatusDirectives::_deflt_offset; 4973 4974 // Support for java Assertions - java_lang_AssertionStatusDirectives. 4975 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \ 4976 macro(_classes_offset, k, "classes", string_array_signature, false); \ 4977 macro(_classEnabled_offset, k, "classEnabled", bool_array_signature, false); \ 4978 macro(_packages_offset, k, "packages", string_array_signature, false); \ 4979 macro(_packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \ 4980 macro(_deflt_offset, k, "deflt", bool_signature, false) 4981 4982 void java_lang_AssertionStatusDirectives::compute_offsets() { 4983 InstanceKlass* k = vmClasses::AssertionStatusDirectives_klass(); 4984 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4985 } 4986 4987 #if INCLUDE_CDS 4988 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) { 4989 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4990 } 4991 #endif 4992 4993 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 4994 o->obj_field_put(_classes_offset, val); 4995 } 4996 4997 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 4998 o->obj_field_put(_classEnabled_offset, val); 4999 } 5000 5001 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 5002 o->obj_field_put(_packages_offset, val); 5003 } 5004 5005 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 5006 o->obj_field_put(_packageEnabled_offset, val); 5007 } 5008 5009 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 5010 o->bool_field_put(_deflt_offset, val); 5011 } 5012 5013 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset; 5014 5015 #define AOS_FIELDS_DO(macro) \ 5016 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false) 5017 5018 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() { 5019 InstanceKlass* k = vmClasses::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass(); 5020 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5021 } 5022 5023 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 5024 assert(_owner_offset != 0, "Must be initialized"); 5025 return obj->obj_field(_owner_offset); 5026 } 5027 5028 #if INCLUDE_CDS 5029 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) { 5030 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5031 } 5032 #endif 5033 5034 int vector_VectorPayload::_payload_offset; 5035 5036 #define VECTORPAYLOAD_FIELDS_DO(macro) \ 5037 macro(_payload_offset, k, "payload", object_signature, false) 5038 5039 void vector_VectorPayload::compute_offsets() { 5040 InstanceKlass* k = vmClasses::vector_VectorPayload_klass(); 5041 VECTORPAYLOAD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5042 } 5043 5044 #if INCLUDE_CDS 5045 void vector_VectorPayload::serialize_offsets(SerializeClosure* f) { 5046 VECTORPAYLOAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5047 } 5048 #endif 5049 5050 void vector_VectorPayload::set_payload(oop o, oop val) { 5051 o->obj_field_put(_payload_offset, val); 5052 } 5053 5054 bool vector_VectorPayload::is_instance(oop obj) { 5055 return obj != nullptr && is_subclass(obj->klass()); 5056 } 5057 5058 int java_lang_Integer_IntegerCache::_static_cache_offset; 5059 int java_lang_Long_LongCache::_static_cache_offset; 5060 int java_lang_Character_CharacterCache::_static_cache_offset; 5061 int java_lang_Short_ShortCache::_static_cache_offset; 5062 int java_lang_Byte_ByteCache::_static_cache_offset; 5063 5064 #define INTEGER_CACHE_FIELDS_DO(macro) \ 5065 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true) 5066 5067 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) { 5068 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5069 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5070 } 5071 5072 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) { 5073 oop base = ik->static_field_base_raw(); 5074 return objArrayOop(base->obj_field(_static_cache_offset)); 5075 } 5076 5077 Symbol* java_lang_Integer_IntegerCache::symbol() { 5078 return vmSymbols::java_lang_Integer_IntegerCache(); 5079 } 5080 5081 #if INCLUDE_CDS 5082 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) { 5083 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5084 } 5085 #endif 5086 #undef INTEGER_CACHE_FIELDS_DO 5087 5088 jint java_lang_Integer::value(oop obj) { 5089 jvalue v; 5090 java_lang_boxing_object::get_value(obj, &v); 5091 return v.i; 5092 } 5093 5094 #define LONG_CACHE_FIELDS_DO(macro) \ 5095 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true) 5096 5097 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) { 5098 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5099 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5100 } 5101 5102 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) { 5103 oop base = ik->static_field_base_raw(); 5104 return objArrayOop(base->obj_field(_static_cache_offset)); 5105 } 5106 5107 Symbol* java_lang_Long_LongCache::symbol() { 5108 return vmSymbols::java_lang_Long_LongCache(); 5109 } 5110 5111 #if INCLUDE_CDS 5112 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) { 5113 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5114 } 5115 #endif 5116 #undef LONG_CACHE_FIELDS_DO 5117 5118 jlong java_lang_Long::value(oop obj) { 5119 jvalue v; 5120 java_lang_boxing_object::get_value(obj, &v); 5121 return v.j; 5122 } 5123 5124 #define CHARACTER_CACHE_FIELDS_DO(macro) \ 5125 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true) 5126 5127 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) { 5128 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5129 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5130 } 5131 5132 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) { 5133 oop base = ik->static_field_base_raw(); 5134 return objArrayOop(base->obj_field(_static_cache_offset)); 5135 } 5136 5137 Symbol* java_lang_Character_CharacterCache::symbol() { 5138 return vmSymbols::java_lang_Character_CharacterCache(); 5139 } 5140 5141 #if INCLUDE_CDS 5142 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) { 5143 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5144 } 5145 #endif 5146 #undef CHARACTER_CACHE_FIELDS_DO 5147 5148 jchar java_lang_Character::value(oop obj) { 5149 jvalue v; 5150 java_lang_boxing_object::get_value(obj, &v); 5151 return v.c; 5152 } 5153 5154 #define SHORT_CACHE_FIELDS_DO(macro) \ 5155 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true) 5156 5157 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) { 5158 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5159 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5160 } 5161 5162 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) { 5163 oop base = ik->static_field_base_raw(); 5164 return objArrayOop(base->obj_field(_static_cache_offset)); 5165 } 5166 5167 Symbol* java_lang_Short_ShortCache::symbol() { 5168 return vmSymbols::java_lang_Short_ShortCache(); 5169 } 5170 5171 #if INCLUDE_CDS 5172 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) { 5173 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5174 } 5175 #endif 5176 #undef SHORT_CACHE_FIELDS_DO 5177 5178 jshort java_lang_Short::value(oop obj) { 5179 jvalue v; 5180 java_lang_boxing_object::get_value(obj, &v); 5181 return v.s; 5182 } 5183 5184 #define BYTE_CACHE_FIELDS_DO(macro) \ 5185 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true) 5186 5187 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) { 5188 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5189 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5190 } 5191 5192 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) { 5193 oop base = ik->static_field_base_raw(); 5194 return objArrayOop(base->obj_field(_static_cache_offset)); 5195 } 5196 5197 Symbol* java_lang_Byte_ByteCache::symbol() { 5198 return vmSymbols::java_lang_Byte_ByteCache(); 5199 } 5200 5201 #if INCLUDE_CDS 5202 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) { 5203 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5204 } 5205 #endif 5206 #undef BYTE_CACHE_FIELDS_DO 5207 5208 jbyte java_lang_Byte::value(oop obj) { 5209 jvalue v; 5210 java_lang_boxing_object::get_value(obj, &v); 5211 return v.b; 5212 } 5213 5214 int java_lang_Boolean::_static_TRUE_offset; 5215 int java_lang_Boolean::_static_FALSE_offset; 5216 5217 #define BOOLEAN_FIELDS_DO(macro) \ 5218 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \ 5219 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true) 5220 5221 5222 void java_lang_Boolean::compute_offsets(InstanceKlass *k) { 5223 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5224 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5225 } 5226 5227 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) { 5228 oop base = ik->static_field_base_raw(); 5229 return base->obj_field(_static_TRUE_offset); 5230 } 5231 5232 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) { 5233 oop base = ik->static_field_base_raw(); 5234 return base->obj_field(_static_FALSE_offset); 5235 } 5236 5237 Symbol* java_lang_Boolean::symbol() { 5238 return vmSymbols::java_lang_Boolean(); 5239 } 5240 5241 #if INCLUDE_CDS 5242 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) { 5243 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5244 } 5245 #endif 5246 #undef BOOLEAN_CACHE_FIELDS_DO 5247 5248 jboolean java_lang_Boolean::value(oop obj) { 5249 jvalue v; 5250 java_lang_boxing_object::get_value(obj, &v); 5251 return v.z; 5252 } 5253 5254 // java_lang_reflect_RecordComponent 5255 5256 int java_lang_reflect_RecordComponent::_clazz_offset; 5257 int java_lang_reflect_RecordComponent::_name_offset; 5258 int java_lang_reflect_RecordComponent::_type_offset; 5259 int java_lang_reflect_RecordComponent::_accessor_offset; 5260 int java_lang_reflect_RecordComponent::_signature_offset; 5261 int java_lang_reflect_RecordComponent::_annotations_offset; 5262 int java_lang_reflect_RecordComponent::_typeAnnotations_offset; 5263 5264 #define RECORDCOMPONENT_FIELDS_DO(macro) \ 5265 macro(_clazz_offset, k, "clazz", class_signature, false); \ 5266 macro(_name_offset, k, "name", string_signature, false); \ 5267 macro(_type_offset, k, "type", class_signature, false); \ 5268 macro(_accessor_offset, k, "accessor", reflect_method_signature, false); \ 5269 macro(_signature_offset, k, "signature", string_signature, false); \ 5270 macro(_annotations_offset, k, "annotations", byte_array_signature, false); \ 5271 macro(_typeAnnotations_offset, k, "typeAnnotations", byte_array_signature, false); 5272 5273 // Support for java_lang_reflect_RecordComponent 5274 void java_lang_reflect_RecordComponent::compute_offsets() { 5275 InstanceKlass* k = vmClasses::RecordComponent_klass(); 5276 RECORDCOMPONENT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5277 } 5278 5279 #if INCLUDE_CDS 5280 void java_lang_reflect_RecordComponent::serialize_offsets(SerializeClosure* f) { 5281 RECORDCOMPONENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5282 } 5283 #endif 5284 5285 void java_lang_reflect_RecordComponent::set_clazz(oop element, oop value) { 5286 element->obj_field_put(_clazz_offset, value); 5287 } 5288 5289 void java_lang_reflect_RecordComponent::set_name(oop element, oop value) { 5290 element->obj_field_put(_name_offset, value); 5291 } 5292 5293 void java_lang_reflect_RecordComponent::set_type(oop element, oop value) { 5294 element->obj_field_put(_type_offset, value); 5295 } 5296 5297 void java_lang_reflect_RecordComponent::set_accessor(oop element, oop value) { 5298 element->obj_field_put(_accessor_offset, value); 5299 } 5300 5301 void java_lang_reflect_RecordComponent::set_signature(oop element, oop value) { 5302 element->obj_field_put(_signature_offset, value); 5303 } 5304 5305 void java_lang_reflect_RecordComponent::set_annotations(oop element, oop value) { 5306 element->obj_field_put(_annotations_offset, value); 5307 } 5308 5309 void java_lang_reflect_RecordComponent::set_typeAnnotations(oop element, oop value) { 5310 element->obj_field_put(_typeAnnotations_offset, value); 5311 } 5312 5313 // java_lang_InternalError 5314 int java_lang_InternalError::_during_unsafe_access_offset; 5315 5316 void java_lang_InternalError::set_during_unsafe_access(oop internal_error) { 5317 internal_error->bool_field_put(_during_unsafe_access_offset, true); 5318 } 5319 5320 jboolean java_lang_InternalError::during_unsafe_access(oop internal_error) { 5321 return internal_error->bool_field(_during_unsafe_access_offset); 5322 } 5323 5324 void java_lang_InternalError::compute_offsets() { 5325 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 5326 } 5327 5328 #if INCLUDE_CDS 5329 void java_lang_InternalError::serialize_offsets(SerializeClosure* f) { 5330 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 5331 } 5332 #endif 5333 5334 #define BASIC_JAVA_CLASSES_DO_PART1(f) \ 5335 f(java_lang_Class) \ 5336 f(java_lang_String) \ 5337 f(java_lang_ref_Reference) \ 5338 //end 5339 5340 #define BASIC_JAVA_CLASSES_DO_PART2(f) \ 5341 f(java_lang_System) \ 5342 f(java_lang_ClassLoader) \ 5343 f(java_lang_Throwable) \ 5344 f(java_lang_Thread) \ 5345 f(java_lang_Thread_FieldHolder) \ 5346 f(java_lang_Thread_Constants) \ 5347 f(java_lang_ThreadGroup) \ 5348 f(java_lang_VirtualThread) \ 5349 f(java_lang_InternalError) \ 5350 f(java_lang_AssertionStatusDirectives) \ 5351 f(java_lang_ref_SoftReference) \ 5352 f(java_lang_invoke_MethodHandle) \ 5353 f(java_lang_invoke_DirectMethodHandle) \ 5354 f(java_lang_invoke_MemberName) \ 5355 f(java_lang_invoke_ResolvedMethodName) \ 5356 f(java_lang_invoke_LambdaForm) \ 5357 f(java_lang_invoke_MethodType) \ 5358 f(java_lang_invoke_CallSite) \ 5359 f(java_lang_invoke_ConstantCallSite) \ 5360 f(java_lang_invoke_MethodHandleNatives_CallSiteContext) \ 5361 f(java_security_AccessControlContext) \ 5362 f(java_lang_reflect_AccessibleObject) \ 5363 f(java_lang_reflect_Method) \ 5364 f(java_lang_reflect_Constructor) \ 5365 f(java_lang_reflect_Field) \ 5366 f(java_lang_reflect_RecordComponent) \ 5367 f(reflect_ConstantPool) \ 5368 f(java_lang_reflect_Parameter) \ 5369 f(java_lang_Module) \ 5370 f(java_lang_StackTraceElement) \ 5371 f(java_lang_ClassFrameInfo) \ 5372 f(java_lang_StackFrameInfo) \ 5373 f(java_lang_LiveStackFrameInfo) \ 5374 f(jdk_internal_vm_ContinuationScope) \ 5375 f(jdk_internal_vm_Continuation) \ 5376 f(jdk_internal_vm_StackChunk) \ 5377 f(java_util_concurrent_locks_AbstractOwnableSynchronizer) \ 5378 f(jdk_internal_foreign_abi_NativeEntryPoint) \ 5379 f(jdk_internal_foreign_abi_ABIDescriptor) \ 5380 f(jdk_internal_foreign_abi_VMStorage) \ 5381 f(jdk_internal_foreign_abi_CallConv) \ 5382 f(jdk_internal_misc_UnsafeConstants) \ 5383 f(java_lang_boxing_object) \ 5384 f(vector_VectorPayload) \ 5385 //end 5386 5387 #define BASIC_JAVA_CLASSES_DO(f) \ 5388 BASIC_JAVA_CLASSES_DO_PART1(f) \ 5389 BASIC_JAVA_CLASSES_DO_PART2(f) 5390 5391 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets(); 5392 5393 // Compute field offsets of all the classes in this file 5394 void JavaClasses::compute_offsets() { 5395 if (CDSConfig::is_using_archive()) { 5396 JVMTI_ONLY(assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() && 5397 JvmtiExport::has_early_class_hook_env()), 5398 "JavaClasses::compute_offsets() must be called in early JVMTI phase.")); 5399 // None of the classes used by the rest of this function can be replaced by 5400 // JVMTI ClassFileLoadHook. 5401 // We are safe to use the archived offsets, which have already been restored 5402 // by JavaClasses::serialize_offsets, without computing the offsets again. 5403 return; 5404 } 5405 5406 // We have already called the compute_offsets() of the 5407 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String, java_lang_Class and 5408 // java_lang_ref_Reference) earlier inside vmClasses::resolve_all() 5409 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS); 5410 } 5411 5412 #if INCLUDE_CDS 5413 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc); 5414 5415 void JavaClasses::serialize_offsets(SerializeClosure* soc) { 5416 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS); 5417 } 5418 #endif 5419 5420 #if INCLUDE_CDS_JAVA_HEAP 5421 bool JavaClasses::is_supported_for_archiving(oop obj) { 5422 Klass* klass = obj->klass(); 5423 5424 if (klass == vmClasses::ClassLoader_klass() || // ClassLoader::loader_data is malloc'ed. 5425 // The next 3 classes are used to implement java.lang.invoke, and are not used directly in 5426 // regular Java code. The implementation of java.lang.invoke uses generated hidden classes 5427 // (e.g., as referenced by ResolvedMethodName::vmholder) that are not yet supported by CDS. 5428 // So for now we cannot not support these classes for archiving. 5429 // 5430 // These objects typically are not referenced by static fields, but rather by resolved 5431 // constant pool entries, so excluding them shouldn't affect the archiving of static fields. 5432 klass == vmClasses::ResolvedMethodName_klass() || 5433 klass == vmClasses::MemberName_klass() || 5434 klass == vmClasses::Context_klass() || 5435 // It's problematic to archive Reference objects. One of the reasons is that 5436 // Reference::discovered may pull in unwanted objects (see JDK-8284336) 5437 klass->is_subclass_of(vmClasses::Reference_klass())) { 5438 return false; 5439 } 5440 5441 return true; 5442 } 5443 #endif 5444 5445 #ifndef PRODUCT 5446 5447 // These functions exist to assert the validity of de-serialized offsets in boxing object as a sanity check. 5448 5449 bool JavaClasses::check_offset(const char *klass_name, int deserialized_offset, const char *field_name, 5450 const char* field_sig) { 5451 EXCEPTION_MARK; 5452 fieldDescriptor fd; 5453 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name); 5454 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 5455 InstanceKlass* ik = InstanceKlass::cast(k); 5456 TempNewSymbol f_name = SymbolTable::new_symbol(field_name); 5457 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig); 5458 if (!ik->find_local_field(f_name, f_sig, &fd)) { 5459 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 5460 return false; 5461 } 5462 if (fd.is_static()) { 5463 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 5464 return false; 5465 } 5466 if (fd.offset() == deserialized_offset ) { 5467 return true; 5468 } else { 5469 tty->print_cr("Offset of nonstatic field %s.%s is deserialized as %d but should really be %d.", 5470 klass_name, field_name, deserialized_offset, fd.offset()); 5471 return false; 5472 } 5473 } 5474 5475 void JavaClasses::check_offsets() { 5476 bool valid = true; 5477 5478 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 5479 valid &= check_offset(klass_name, cpp_klass_name :: _##field_name ## _offset, #field_name, field_sig) 5480 5481 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 5482 valid &= check_offset(klass_name, cpp_klass_name :: _##long_ ## field_name ## _offset, #field_name, field_sig) 5483 5484 // Boxed primitive objects (java_lang_boxing_object) 5485 5486 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 5487 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 5488 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 5489 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 5490 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 5491 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 5492 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 5493 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 5494 5495 if (!valid) vm_exit_during_initialization("Field offset verification failed"); 5496 } 5497 5498 #endif // PRODUCT 5499 5500 int InjectedField::compute_offset() { 5501 InstanceKlass* ik = InstanceKlass::cast(klass()); 5502 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 5503 if (!may_be_java && !fs.field_flags().is_injected()) { 5504 // Only look at injected fields 5505 continue; 5506 } 5507 if (fs.name() == name() && fs.signature() == signature()) { 5508 return fs.offset(); 5509 } 5510 } 5511 ResourceMark rm; 5512 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)" : ""); 5513 #ifndef PRODUCT 5514 ik->print(); 5515 tty->print_cr("all fields:"); 5516 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 5517 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int()); 5518 } 5519 #endif //PRODUCT 5520 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class"); 5521 return -1; 5522 } 5523 5524 void javaClasses_init() { 5525 JavaClasses::compute_offsets(); 5526 JavaClasses::check_offsets(); 5527 FilteredFieldsMap::initialize(); // must be done after computing offsets. 5528 }