1 /* 2 * Copyright (c) 1997, 2025, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "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/flatArrayKlass.hpp" 57 #include "oops/inlineKlass.inline.hpp" 58 #include "oops/instanceKlass.inline.hpp" 59 #include "oops/instanceMirrorKlass.inline.hpp" 60 #include "oops/klass.hpp" 61 #include "oops/klass.inline.hpp" 62 #include "oops/method.inline.hpp" 63 #include "oops/objArrayKlass.hpp" 64 #include "oops/objArrayOop.inline.hpp" 65 #include "oops/oopCast.inline.hpp" 66 #include "oops/oop.inline.hpp" 67 #include "oops/symbol.hpp" 68 #include "oops/recordComponent.hpp" 69 #include "oops/typeArrayOop.inline.hpp" 70 #include "prims/jvmtiExport.hpp" 71 #include "prims/methodHandles.hpp" 72 #include "prims/resolvedMethodTable.hpp" 73 #include "runtime/continuationEntry.inline.hpp" 74 #include "runtime/continuationJavaClasses.inline.hpp" 75 #include "runtime/fieldDescriptor.inline.hpp" 76 #include "runtime/frame.inline.hpp" 77 #include "runtime/handles.inline.hpp" 78 #include "runtime/handshake.hpp" 79 #include "runtime/init.hpp" 80 #include "runtime/interfaceSupport.inline.hpp" 81 #include "runtime/java.hpp" 82 #include "runtime/javaCalls.hpp" 83 #include "runtime/javaThread.hpp" 84 #include "runtime/jniHandles.inline.hpp" 85 #include "runtime/reflectionUtils.hpp" 86 #include "runtime/safepoint.hpp" 87 #include "runtime/safepointVerifiers.hpp" 88 #include "runtime/threadSMR.hpp" 89 #include "runtime/vframe.inline.hpp" 90 #include "runtime/vm_version.hpp" 91 #include "utilities/align.hpp" 92 #include "utilities/globalDefinitions.hpp" 93 #include "utilities/growableArray.hpp" 94 #include "utilities/preserveException.hpp" 95 #include "utilities/utf8.hpp" 96 #if INCLUDE_JVMCI 97 #include "jvmci/jvmciJavaClasses.hpp" 98 #endif 99 100 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java) \ 101 { VM_CLASS_ID(klass), VM_SYMBOL_ENUM_NAME(name##_name), VM_SYMBOL_ENUM_NAME(signature), may_be_java }, 102 103 InjectedField JavaClasses::_injected_fields[] = { 104 ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD) 105 }; 106 107 // Register native methods of Object 108 void java_lang_Object::register_natives(TRAPS) { 109 InstanceKlass* obj = vmClasses::Object_klass(); 110 Method::register_native(obj, vmSymbols::hashCode_name(), 111 vmSymbols::void_int_signature(), (address) &JVM_IHashCode, CHECK); 112 Method::register_native(obj, vmSymbols::wait_name(), 113 vmSymbols::long_void_signature(), (address) &JVM_MonitorWait, CHECK); 114 Method::register_native(obj, vmSymbols::notify_name(), 115 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotify, CHECK); 116 Method::register_native(obj, vmSymbols::notifyAll_name(), 117 vmSymbols::void_method_signature(), (address) &JVM_MonitorNotifyAll, CHECK); 118 Method::register_native(obj, vmSymbols::clone_name(), 119 vmSymbols::void_object_signature(), (address) &JVM_Clone, THREAD); 120 } 121 122 int JavaClasses::compute_injected_offset(InjectedFieldID id) { 123 return _injected_fields[(int)id].compute_offset(); 124 } 125 126 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) { 127 *field_count = 0; 128 129 vmSymbolID sid = vmSymbols::find_sid(class_name); 130 if (sid == vmSymbolID::NO_SID) { 131 // Only well known classes can inject fields 132 return nullptr; 133 } 134 135 int count = 0; 136 int start = -1; 137 138 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \ 139 if (sid == VM_SYMBOL_ENUM_NAME(klass)) { \ 140 count++; \ 141 if (start == -1) { \ 142 start = (int)InjectedFieldID::klass##_##name##_enum; \ 143 } \ 144 } 145 ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD); 146 #undef LOOKUP_INJECTED_FIELD 147 148 if (start != -1) { 149 *field_count = count; 150 return _injected_fields + start; 151 } 152 return nullptr; 153 } 154 155 156 // Helpful routine for computing field offsets at run time rather than hardcoding them 157 // Finds local fields only, including static fields. Static field offsets are from the 158 // beginning of the mirror. 159 void JavaClasses::compute_offset(int &dest_offset, 160 InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol, 161 bool is_static) { 162 fieldDescriptor fd; 163 if (ik == nullptr) { 164 ResourceMark rm; 165 log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string()); 166 vm_exit_during_initialization("Invalid layout of well-known class"); 167 } 168 169 if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) { 170 ResourceMark rm; 171 log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(), 172 name_symbol->as_C_string(), signature_symbol->as_C_string()); 173 #ifndef PRODUCT 174 // Prints all fields and offsets 175 Log(class) lt; 176 LogStream ls(lt.error()); 177 ik->print_on(&ls); 178 #endif //PRODUCT 179 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class"); 180 } 181 dest_offset = fd.offset(); 182 } 183 184 // Overloading to pass name as a string. 185 void JavaClasses::compute_offset(int& dest_offset, InstanceKlass* ik, 186 const char* name_string, Symbol* signature_symbol, 187 bool is_static) { 188 TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string)); 189 if (name == nullptr) { 190 ResourceMark rm; 191 log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string); 192 vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name()); 193 } 194 compute_offset(dest_offset, ik, name, signature_symbol, is_static); 195 } 196 197 // java_lang_String 198 199 int java_lang_String::_value_offset; 200 int java_lang_String::_hash_offset; 201 int java_lang_String::_hashIsZero_offset; 202 int java_lang_String::_coder_offset; 203 int java_lang_String::_flags_offset; 204 205 bool java_lang_String::_initialized; 206 207 208 bool java_lang_String::test_and_set_flag(oop java_string, uint8_t flag_mask) { 209 uint8_t* addr = flags_addr(java_string); 210 uint8_t value = Atomic::load(addr); 211 while ((value & flag_mask) == 0) { 212 uint8_t old_value = value; 213 value |= flag_mask; 214 value = Atomic::cmpxchg(addr, old_value, value); 215 if (value == old_value) return false; // Flag bit changed from 0 to 1. 216 } 217 return true; // Flag bit is already 1. 218 } 219 220 #define STRING_FIELDS_DO(macro) \ 221 macro(_value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \ 222 macro(_hash_offset, k, "hash", int_signature, false); \ 223 macro(_hashIsZero_offset, k, "hashIsZero", bool_signature, false); \ 224 macro(_coder_offset, k, "coder", byte_signature, false); 225 226 void java_lang_String::compute_offsets() { 227 if (_initialized) { 228 return; 229 } 230 231 InstanceKlass* k = vmClasses::String_klass(); 232 STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET); 233 STRING_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 234 235 _initialized = true; 236 } 237 238 #if INCLUDE_CDS 239 void java_lang_String::serialize_offsets(SerializeClosure* f) { 240 STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 241 STRING_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 242 f->do_bool(&_initialized); 243 } 244 #endif 245 246 class CompactStringsFixup : public FieldClosure { 247 private: 248 bool _value; 249 250 public: 251 CompactStringsFixup(bool value) : _value(value) {} 252 253 void do_field(fieldDescriptor* fd) { 254 if (fd->name() == vmSymbols::compact_strings_name()) { 255 oop mirror = fd->field_holder()->java_mirror(); 256 assert(fd->field_holder() == vmClasses::String_klass(), "Should be String"); 257 assert(mirror != nullptr, "String must have mirror already"); 258 mirror->bool_field_put(fd->offset(), _value); 259 } 260 } 261 }; 262 263 void java_lang_String::set_compact_strings(bool value) { 264 CompactStringsFixup fix(value); 265 vmClasses::String_klass()->do_local_static_fields(&fix); 266 } 267 268 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) { 269 assert(_initialized, "Must be initialized"); 270 assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings"); 271 272 // Create the String object first, so there's a chance that the String 273 // and the char array it points to end up in the same cache line. 274 oop obj; 275 obj = vmClasses::String_klass()->allocate_instance(CHECK_NH); 276 277 // Create the char array. The String object must be handlized here 278 // because GC can happen as a result of the allocation attempt. 279 Handle h_obj(THREAD, obj); 280 int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16. 281 typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);; 282 283 // Point the String at the char array 284 obj = h_obj(); 285 set_value(obj, buffer); 286 // No need to zero the offset, allocation zero'ed the entire String object 287 set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16); 288 return h_obj; 289 } 290 291 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) { 292 bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length); 293 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 294 typeArrayOop buffer = value(h_obj()); 295 assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]"); 296 if (is_latin1) { 297 for (int index = 0; index < length; index++) { 298 buffer->byte_at_put(index, (jbyte)unicode[index]); 299 } 300 } else { 301 for (int index = 0; index < length; index++) { 302 buffer->char_at_put(index, unicode[index]); 303 } 304 } 305 306 #ifdef ASSERT 307 { 308 ResourceMark rm; 309 size_t utf8_len = static_cast<size_t>(length); 310 char* expected = UNICODE::as_utf8(unicode, utf8_len); 311 char* actual = as_utf8_string(h_obj()); 312 if (strcmp(expected, actual) != 0) { 313 fatal("Unicode conversion failure: %s --> %s", expected, actual); 314 } 315 } 316 #endif 317 318 return h_obj; 319 } 320 321 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) { 322 Handle h_obj = create_from_unicode(unicode, length, CHECK_NULL); 323 return h_obj(); 324 } 325 326 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) { 327 if (utf8_str == nullptr) { 328 return Handle(); 329 } 330 bool has_multibyte, is_latin1; 331 int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte); 332 if (!CompactStrings) { 333 has_multibyte = true; 334 is_latin1 = false; 335 } 336 337 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 338 if (length > 0) { 339 if (!has_multibyte) { 340 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str); 341 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length); 342 } else if (is_latin1) { 343 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 344 } else { 345 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 346 } 347 } 348 349 #ifdef ASSERT 350 // This check is too strict when the input string is not a valid UTF8. 351 // For example, it may be created with arbitrary content via jni_NewStringUTF. 352 if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, strlen(utf8_str), /*version_leq_47*/false)) { 353 ResourceMark rm; 354 const char* expected = utf8_str; 355 char* actual = as_utf8_string(h_obj()); 356 if (strcmp(expected, actual) != 0) { 357 fatal("String conversion failure: %s --> %s", expected, actual); 358 } 359 } 360 #endif 361 362 return h_obj; 363 } 364 365 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) { 366 Handle h_obj = create_from_str(utf8_str, CHECK_NULL); 367 return h_obj(); 368 } 369 370 Handle java_lang_String::create_from_symbol(const Symbol* symbol, TRAPS) { 371 const char* utf8_str = (char*)symbol->bytes(); 372 int utf8_len = symbol->utf8_length(); 373 374 bool has_multibyte, is_latin1; 375 int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte); 376 if (!CompactStrings) { 377 has_multibyte = true; 378 is_latin1 = false; 379 } 380 381 Handle h_obj = basic_create(length, is_latin1, CHECK_NH); 382 if (length > 0) { 383 if (!has_multibyte) { 384 const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str); 385 ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length); 386 } else if (is_latin1) { 387 UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length); 388 } else { 389 UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length); 390 } 391 } 392 393 #ifdef ASSERT 394 // This check is too strict on older classfile versions 395 if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, utf8_len, /*version_leq_47*/false)) 396 { 397 ResourceMark rm; 398 const char* expected = symbol->as_utf8(); 399 char* actual = as_utf8_string(h_obj()); 400 if (strncmp(expected, actual, utf8_len) != 0) { 401 fatal("Symbol conversion failure: %s --> %s", expected, actual); 402 } 403 } 404 #endif 405 406 return h_obj; 407 } 408 409 // Converts a C string to a Java String based on current encoding 410 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) { 411 assert(str != nullptr, "bad arguments"); 412 413 typedef jstring (JNICALL *to_java_string_fn_t)(JNIEnv*, const char *); 414 static to_java_string_fn_t _to_java_string_fn = nullptr; 415 416 if (_to_java_string_fn == nullptr) { 417 void *lib_handle = os::native_java_library(); 418 _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "JNU_NewStringPlatform")); 419 if (_to_java_string_fn == nullptr) { 420 fatal("JNU_NewStringPlatform missing"); 421 } 422 } 423 424 jstring js = nullptr; 425 { 426 JavaThread* thread = THREAD; 427 HandleMark hm(thread); 428 ThreadToNativeFromVM ttn(thread); 429 js = (_to_java_string_fn)(thread->jni_environment(), str); 430 } 431 432 Handle native_platform_string(THREAD, JNIHandles::resolve(js)); 433 JNIHandles::destroy_local(js); // destroy local JNIHandle. 434 return native_platform_string; 435 } 436 437 // Converts a Java String to a native C string that can be used for 438 // native OS calls. 439 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) { 440 typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*); 441 static to_platform_string_fn_t _to_platform_string_fn = nullptr; 442 443 if (_to_platform_string_fn == nullptr) { 444 void *lib_handle = os::native_java_library(); 445 _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars")); 446 if (_to_platform_string_fn == nullptr) { 447 fatal("GetStringPlatformChars missing"); 448 } 449 } 450 451 char *native_platform_string; 452 jstring js; 453 { JavaThread* thread = THREAD; 454 js = (jstring) JNIHandles::make_local(thread, java_string()); 455 HandleMark hm(thread); 456 ThreadToNativeFromVM ttn(thread); 457 JNIEnv *env = thread->jni_environment(); 458 bool is_copy; 459 native_platform_string = (_to_platform_string_fn)(env, js, &is_copy); 460 assert(is_copy == JNI_TRUE, "is_copy value changed"); 461 } 462 463 // Uses a store barrier and therefore needs to be in vm state 464 JNIHandles::destroy_local(js); 465 466 return native_platform_string; 467 } 468 469 Handle java_lang_String::externalize_classname(Symbol* java_name, TRAPS) { 470 ResourceMark rm(THREAD); 471 return create_from_str(java_name->as_klass_external_name(), THREAD); 472 } 473 474 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) { 475 jchar* result = as_unicode_string_or_null(java_string, length); 476 if (result == nullptr) { 477 THROW_MSG_NULL(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string"); 478 } 479 return result; 480 } 481 482 jchar* java_lang_String::as_unicode_string_or_null(oop java_string, int& length) { 483 typeArrayOop value = java_lang_String::value(java_string); 484 length = java_lang_String::length(java_string, value); 485 bool is_latin1 = java_lang_String::is_latin1(java_string); 486 487 jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length); 488 if (result != nullptr) { 489 if (!is_latin1) { 490 for (int index = 0; index < length; index++) { 491 result[index] = value->char_at(index); 492 } 493 } else { 494 for (int index = 0; index < length; index++) { 495 result[index] = ((jchar) value->byte_at(index)) & 0xff; 496 } 497 } 498 } 499 return result; 500 } 501 502 inline unsigned int java_lang_String::hash_code_impl(oop java_string, bool update) { 503 // The hash and hashIsZero fields are subject to a benign data race, 504 // making it crucial to ensure that any observable result of the 505 // calculation in this method stays correct under any possible read of 506 // these fields. Necessary restrictions to allow this to be correct 507 // without explicit memory fences or similar concurrency primitives is 508 // that we can ever only write to one of these two fields for a given 509 // String instance, and that the computation is idempotent and derived 510 // from immutable state 511 assert(_initialized && (_hash_offset > 0) && (_hashIsZero_offset > 0), "Must be initialized"); 512 if (java_lang_String::hash_is_set(java_string)) { 513 return java_string->int_field(_hash_offset); 514 } 515 516 typeArrayOop value = java_lang_String::value(java_string); 517 int length = java_lang_String::length(java_string, value); 518 bool is_latin1 = java_lang_String::is_latin1(java_string); 519 520 unsigned int hash = 0; 521 if (length > 0) { 522 if (is_latin1) { 523 hash = java_lang_String::hash_code(value->byte_at_addr(0), length); 524 } else { 525 hash = java_lang_String::hash_code(value->char_at_addr(0), length); 526 } 527 } 528 529 if (update) { 530 if (hash != 0) { 531 java_string->int_field_put(_hash_offset, hash); 532 } else { 533 java_string->bool_field_put(_hashIsZero_offset, true); 534 } 535 } 536 return hash; 537 } 538 539 unsigned int java_lang_String::hash_code(oop java_string) { 540 return hash_code_impl(java_string, /*update=*/true); 541 } 542 543 unsigned int java_lang_String::hash_code_noupdate(oop java_string) { 544 return hash_code_impl(java_string, /*update=*/false); 545 } 546 547 548 char* java_lang_String::as_quoted_ascii(oop java_string) { 549 typeArrayOop value = java_lang_String::value(java_string); 550 int length = java_lang_String::length(java_string, value); 551 bool is_latin1 = java_lang_String::is_latin1(java_string); 552 553 if (length == 0) return nullptr; 554 555 char* result; 556 size_t result_length; 557 if (!is_latin1) { 558 jchar* base = value->char_at_addr(0); 559 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 560 result = NEW_RESOURCE_ARRAY(char, result_length); 561 UNICODE::as_quoted_ascii(base, length, result, result_length); 562 } else { 563 jbyte* base = value->byte_at_addr(0); 564 result_length = UNICODE::quoted_ascii_length(base, length) + 1; 565 result = NEW_RESOURCE_ARRAY(char, result_length); 566 UNICODE::as_quoted_ascii(base, length, result, result_length); 567 } 568 assert(result_length >= (size_t)length + 1, "must not be shorter"); 569 assert(result_length == strlen(result) + 1, "must match"); 570 return result; 571 } 572 573 Symbol* java_lang_String::as_symbol(oop java_string) { 574 typeArrayOop value = java_lang_String::value(java_string); 575 int length = java_lang_String::length(java_string, value); 576 bool is_latin1 = java_lang_String::is_latin1(java_string); 577 if (!is_latin1) { 578 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0); 579 Symbol* sym = SymbolTable::new_symbol(base, length); 580 return sym; 581 } else { 582 ResourceMark rm; 583 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0); 584 size_t utf8_len = static_cast<size_t>(length); 585 const char* base = UNICODE::as_utf8(position, utf8_len); 586 Symbol* sym = SymbolTable::new_symbol(base, checked_cast<int>(utf8_len)); 587 return sym; 588 } 589 } 590 591 Symbol* java_lang_String::as_symbol_or_null(oop java_string) { 592 typeArrayOop value = java_lang_String::value(java_string); 593 int length = java_lang_String::length(java_string, value); 594 bool is_latin1 = java_lang_String::is_latin1(java_string); 595 if (!is_latin1) { 596 jchar* base = (length == 0) ? nullptr : value->char_at_addr(0); 597 return SymbolTable::probe_unicode(base, length); 598 } else { 599 ResourceMark rm; 600 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0); 601 size_t utf8_len = static_cast<size_t>(length); 602 const char* base = UNICODE::as_utf8(position, utf8_len); 603 return SymbolTable::probe(base, checked_cast<int>(utf8_len)); 604 } 605 } 606 607 size_t java_lang_String::utf8_length(oop java_string, typeArrayOop value) { 608 assert(value_equals(value, java_lang_String::value(java_string)), 609 "value must be same as java_lang_String::value(java_string)"); 610 int length = java_lang_String::length(java_string, value); 611 if (length == 0) { 612 return 0; 613 } 614 if (!java_lang_String::is_latin1(java_string)) { 615 return UNICODE::utf8_length(value->char_at_addr(0), length); 616 } else { 617 return UNICODE::utf8_length(value->byte_at_addr(0), length); 618 } 619 } 620 621 size_t java_lang_String::utf8_length(oop java_string) { 622 typeArrayOop value = java_lang_String::value(java_string); 623 return utf8_length(java_string, value); 624 } 625 626 int java_lang_String::utf8_length_as_int(oop java_string) { 627 typeArrayOop value = java_lang_String::value(java_string); 628 return utf8_length_as_int(java_string, value); 629 } 630 631 int java_lang_String::utf8_length_as_int(oop java_string, typeArrayOop value) { 632 assert(value_equals(value, java_lang_String::value(java_string)), 633 "value must be same as java_lang_String::value(java_string)"); 634 int length = java_lang_String::length(java_string, value); 635 if (length == 0) { 636 return 0; 637 } 638 if (!java_lang_String::is_latin1(java_string)) { 639 return UNICODE::utf8_length_as_int(value->char_at_addr(0), length); 640 } else { 641 return UNICODE::utf8_length_as_int(value->byte_at_addr(0), length); 642 } 643 } 644 645 char* java_lang_String::as_utf8_string(oop java_string) { 646 size_t length; 647 return as_utf8_string(java_string, length); 648 } 649 650 char* java_lang_String::as_utf8_string(oop java_string, size_t& length) { 651 typeArrayOop value = java_lang_String::value(java_string); 652 // `length` is used as the incoming number of characters to 653 // convert, and then set as the number of bytes in the UTF8 sequence. 654 length = java_lang_String::length(java_string, value); 655 bool is_latin1 = java_lang_String::is_latin1(java_string); 656 if (!is_latin1) { 657 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0); 658 return UNICODE::as_utf8(position, length); 659 } else { 660 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0); 661 return UNICODE::as_utf8(position, length); 662 } 663 } 664 665 // Uses a provided buffer if it's sufficiently large, otherwise allocates 666 // a resource array to fit 667 char* java_lang_String::as_utf8_string_full(oop java_string, char* buf, size_t buflen, size_t& utf8_len) { 668 typeArrayOop value = java_lang_String::value(java_string); 669 int len = java_lang_String::length(java_string, value); 670 bool is_latin1 = java_lang_String::is_latin1(java_string); 671 if (!is_latin1) { 672 jchar *position = (len == 0) ? nullptr : value->char_at_addr(0); 673 utf8_len = UNICODE::utf8_length(position, len); 674 if (utf8_len >= buflen) { 675 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1); 676 } 677 return UNICODE::as_utf8(position, len, buf, utf8_len + 1); 678 } else { 679 jbyte *position = (len == 0) ? nullptr : value->byte_at_addr(0); 680 utf8_len = UNICODE::utf8_length(position, len); 681 if (utf8_len >= buflen) { 682 buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1); 683 } 684 return UNICODE::as_utf8(position, len, buf, utf8_len + 1); 685 } 686 } 687 688 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, size_t buflen) { 689 assert(value_equals(value, java_lang_String::value(java_string)), 690 "value must be same as java_lang_String::value(java_string)"); 691 int length = java_lang_String::length(java_string, value); 692 bool is_latin1 = java_lang_String::is_latin1(java_string); 693 if (!is_latin1) { 694 jchar* position = (length == 0) ? nullptr : value->char_at_addr(0); 695 return UNICODE::as_utf8(position, length, buf, buflen); 696 } else { 697 jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0); 698 return UNICODE::as_utf8(position, length, buf, buflen); 699 } 700 } 701 702 char* java_lang_String::as_utf8_string(oop java_string, char* buf, size_t buflen) { 703 typeArrayOop value = java_lang_String::value(java_string); 704 return as_utf8_string(java_string, value, buf, buflen); 705 } 706 707 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) { 708 // `length` is used as the incoming number of characters to 709 // convert, and then set as the number of bytes in the UTF8 sequence. 710 size_t length = static_cast<size_t>(len); 711 typeArrayOop value = java_lang_String::value(java_string); 712 bool is_latin1 = java_lang_String::is_latin1(java_string); 713 assert(start + len <= java_lang_String::length(java_string), "just checking"); 714 if (!is_latin1) { 715 jchar* position = value->char_at_addr(start); 716 return UNICODE::as_utf8(position, length); 717 } else { 718 jbyte* position = value->byte_at_addr(start); 719 return UNICODE::as_utf8(position, length); 720 } 721 } 722 723 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, size_t buflen) { 724 assert(value_equals(value, java_lang_String::value(java_string)), 725 "value must be same as java_lang_String::value(java_string)"); 726 assert(start + len <= java_lang_String::length(java_string), "just checking"); 727 bool is_latin1 = java_lang_String::is_latin1(java_string); 728 if (!is_latin1) { 729 jchar* position = value->char_at_addr(start); 730 return UNICODE::as_utf8(position, len, buf, buflen); 731 } else { 732 jbyte* position = value->byte_at_addr(start); 733 return UNICODE::as_utf8(position, len, buf, buflen); 734 } 735 } 736 737 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) { 738 assert(java_string->klass() == vmClasses::String_klass(), 739 "must be java_string"); 740 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 741 int length = java_lang_String::length(java_string, value); 742 if (length != len) { 743 return false; 744 } 745 bool is_latin1 = java_lang_String::is_latin1(java_string); 746 if (!is_latin1) { 747 for (int i = 0; i < len; i++) { 748 if (value->char_at(i) != chars[i]) { 749 return false; 750 } 751 } 752 } else { 753 for (int i = 0; i < len; i++) { 754 if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) { 755 return false; 756 } 757 } 758 } 759 return true; 760 } 761 762 bool java_lang_String::equals(oop java_string, const char* utf8_string, size_t utf8_len) { 763 assert(java_string->klass() == vmClasses::String_klass(), 764 "must be java_string"); 765 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 766 int length = java_lang_String::length(java_string, value); 767 int unicode_length = UTF8::unicode_length(utf8_string, utf8_len); 768 if (length != unicode_length) { 769 return false; 770 } 771 bool is_latin1 = java_lang_String::is_latin1(java_string); 772 jchar c; 773 if (!is_latin1) { 774 for (int i = 0; i < unicode_length; i++) { 775 utf8_string = UTF8::next(utf8_string, &c); 776 if (value->char_at(i) != c) { 777 return false; 778 } 779 } 780 } else { 781 for (int i = 0; i < unicode_length; i++) { 782 utf8_string = UTF8::next(utf8_string, &c); 783 if ((((jchar) value->byte_at(i)) & 0xff) != c) { 784 return false; 785 } 786 } 787 } 788 return true; 789 } 790 791 bool java_lang_String::equals(oop str1, oop str2) { 792 assert(str1->klass() == vmClasses::String_klass(), 793 "must be java String"); 794 assert(str2->klass() == vmClasses::String_klass(), 795 "must be java String"); 796 typeArrayOop value1 = java_lang_String::value_no_keepalive(str1); 797 bool is_latin1 = java_lang_String::is_latin1(str1); 798 typeArrayOop value2 = java_lang_String::value_no_keepalive(str2); 799 bool is_latin2 = java_lang_String::is_latin1(str2); 800 801 if (is_latin1 != is_latin2) { 802 // Strings with different coders are never equal. 803 return false; 804 } 805 return value_equals(value1, value2); 806 } 807 808 // Print the given string to the given outputStream, limiting the output to 809 // at most max_length of the string's characters. If the length exceeds the 810 // limit we print an abridged version of the string with the "middle" elided 811 // and replaced by " ... (N characters ommitted) ... ". If max_length is odd 812 // it is treated as max_length-1. 813 void java_lang_String::print(oop java_string, outputStream* st, int max_length) { 814 assert(java_string->klass() == vmClasses::String_klass(), "must be java_string"); 815 // We need at least two characters to print A ... B 816 assert(max_length > 1, "invalid max_length: %d", max_length); 817 818 typeArrayOop value = java_lang_String::value_no_keepalive(java_string); 819 820 if (value == nullptr) { 821 // This can happen if, e.g., printing a String 822 // object before its initializer has been called 823 st->print("nullptr"); 824 return; 825 } 826 827 int length = java_lang_String::length(java_string, value); 828 bool is_latin1 = java_lang_String::is_latin1(java_string); 829 830 bool abridge = length > max_length; 831 832 st->print("\""); 833 for (int index = 0; index < length; index++) { 834 // If we need to abridge and we've printed half the allowed characters 835 // then jump to the tail of the string. 836 if (abridge && index >= max_length / 2) { 837 st->print(" ... (%d characters ommitted) ... ", length - 2 * (max_length / 2)); 838 index = length - (max_length / 2); 839 abridge = false; // only do this once 840 } 841 jchar c = (!is_latin1) ? value->char_at(index) : 842 ((jchar) value->byte_at(index)) & 0xff; 843 if (c < ' ') { 844 st->print("\\x%02X", c); // print control characters e.g. \x0A 845 } else { 846 st->print("%c", c); 847 } 848 } 849 st->print("\""); 850 851 if (length > max_length) { 852 st->print(" (abridged) "); 853 } 854 } 855 856 // java_lang_Class 857 858 int java_lang_Class::_klass_offset; 859 int java_lang_Class::_array_klass_offset; 860 int java_lang_Class::_oop_size_offset; 861 int java_lang_Class::_static_oop_field_count_offset; 862 int java_lang_Class::_class_loader_offset; 863 int java_lang_Class::_module_offset; 864 int java_lang_Class::_protection_domain_offset; 865 int java_lang_Class::_component_mirror_offset; 866 int java_lang_Class::_init_lock_offset; 867 int java_lang_Class::_signers_offset; 868 int java_lang_Class::_name_offset; 869 int java_lang_Class::_source_file_offset; 870 int java_lang_Class::_classData_offset; 871 int java_lang_Class::_classRedefinedCount_offset; 872 int java_lang_Class::_reflectionData_offset; 873 874 bool java_lang_Class::_offsets_computed = false; 875 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = nullptr; 876 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = nullptr; 877 878 #ifdef ASSERT 879 inline static void assert_valid_static_string_field(fieldDescriptor* fd) { 880 assert(fd->has_initial_value(), "caller should have checked this"); 881 assert(fd->field_type() == T_OBJECT, "caller should have checked this"); 882 assert(fd->signature() == vmSymbols::string_signature(), "just checking"); 883 } 884 #endif 885 886 static void initialize_static_string_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 887 DEBUG_ONLY(assert_valid_static_string_field(fd);) 888 oop string = fd->string_initial_value(CHECK); 889 mirror()->obj_field_put(fd->offset(), string); 890 } 891 892 static void initialize_static_primitive_field(fieldDescriptor* fd, Handle mirror) { 893 assert(fd->has_initial_value(), "caller should have checked this"); 894 BasicType t = fd->field_type(); 895 switch (t) { 896 case T_BYTE: 897 mirror()->byte_field_put(fd->offset(), (jbyte)(fd->int_initial_value())); 898 break; 899 case T_BOOLEAN: 900 mirror()->bool_field_put(fd->offset(), (jboolean)(fd->int_initial_value())); 901 break; 902 case T_CHAR: 903 mirror()->char_field_put(fd->offset(), (jchar)(fd->int_initial_value())); 904 break; 905 case T_SHORT: 906 mirror()->short_field_put(fd->offset(), (jshort)(fd->int_initial_value())); 907 break; 908 case T_INT: 909 mirror()->int_field_put(fd->offset(), fd->int_initial_value()); 910 break; 911 case T_FLOAT: 912 mirror()->float_field_put(fd->offset(), fd->float_initial_value()); 913 break; 914 case T_DOUBLE: 915 mirror()->double_field_put(fd->offset(), fd->double_initial_value()); 916 break; 917 case T_LONG: 918 mirror()->long_field_put(fd->offset(), fd->long_initial_value()); 919 break; 920 default: 921 // Illegal ConstantValue attribute in class file should have been 922 // caught during classfile parsing. 923 ShouldNotReachHere(); 924 } 925 } 926 927 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) { 928 assert(mirror.not_null() && fd->is_static(), "just checking"); 929 if (fd->has_initial_value()) { 930 if (fd->field_type() != T_OBJECT) { 931 initialize_static_primitive_field(fd, mirror); 932 } else { 933 initialize_static_string_field(fd, mirror, CHECK); 934 } 935 } 936 } 937 938 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) { 939 assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already"); 940 941 // If the offset was read from the shared archive, it was fixed up already 942 if (!k->is_shared()) { 943 if (k->is_instance_klass()) { 944 // During bootstrap, java.lang.Class wasn't loaded so static field 945 // offsets were computed without the size added it. Go back and 946 // update all the static field offsets to included the size. 947 948 // Unfortunately, the FieldInfo stream is encoded with UNSIGNED5 which doesn't allow 949 // content updates. So the FieldInfo stream has to be decompressed into a temporary array, 950 // static fields offsets are updated in this array before reencoding everything into 951 // a new UNSIGNED5 stream, and substitute it to the old FieldInfo stream. 952 953 int java_fields; 954 int injected_fields; 955 InstanceKlass* ik = InstanceKlass::cast(k); 956 GrowableArray<FieldInfo>* fields = 957 FieldInfoStream::create_FieldInfoArray(ik->fieldinfo_stream(), 958 &java_fields, &injected_fields); 959 for (int i = 0; i < fields->length(); i++) { 960 FieldInfo* fi = fields->adr_at(i); 961 if (fi->access_flags().is_static()) { 962 fi->set_offset(fi->offset() + InstanceMirrorKlass::offset_of_static_fields()); 963 } 964 } 965 Array<u1>* old_stream = ik->fieldinfo_stream(); 966 assert(fields->length() == (java_fields + injected_fields), "Must be"); 967 Array<u1>* new_fis = FieldInfoStream::create_FieldInfoStream(fields, java_fields, injected_fields, k->class_loader_data(), CHECK); 968 ik->set_fieldinfo_stream(new_fis); 969 MetadataFactory::free_array<u1>(k->class_loader_data(), old_stream); 970 } 971 } 972 973 if (k->is_shared() && k->has_archived_mirror_index()) { 974 if (ArchiveHeapLoader::is_in_use()) { 975 bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK); 976 assert(present, "Missing archived mirror for %s", k->external_name()); 977 return; 978 } else { 979 k->clear_java_mirror_handle(); 980 k->clear_archived_mirror_index(); 981 } 982 } 983 create_mirror(k, Handle(), Handle(), Handle(), Handle(), CHECK); 984 } 985 986 void java_lang_Class::initialize_mirror_fields(Klass* k, 987 Handle mirror, 988 Handle protection_domain, 989 Handle classData, 990 TRAPS) { 991 // Allocate a simple java object for a lock. 992 // This needs to be a java object because during class initialization 993 // it can be held across a java call. 994 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK); 995 set_init_lock(mirror(), r); 996 997 // Set protection domain also 998 set_protection_domain(mirror(), protection_domain()); 999 1000 // Initialize static fields 1001 InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK); 1002 1003 // Set classData 1004 set_class_data(mirror(), classData()); 1005 } 1006 1007 // Set the java.lang.Module module field in the java_lang_Class mirror 1008 void java_lang_Class::set_mirror_module_field(JavaThread* current, Klass* k, Handle mirror, Handle module) { 1009 if (module.is_null()) { 1010 // During startup, the module may be null only if java.base has not been defined yet. 1011 // Put the class on the fixup_module_list to patch later when the java.lang.Module 1012 // for java.base is known. But note that since we captured the null module another 1013 // thread may have completed that initialization. 1014 1015 bool javabase_was_defined = false; 1016 { 1017 MutexLocker m1(current, Module_lock); 1018 // Keep list of classes needing java.base module fixup 1019 if (!ModuleEntryTable::javabase_defined()) { 1020 assert(k->java_mirror() != nullptr, "Class's mirror is null"); 1021 k->class_loader_data()->inc_keep_alive_ref_count(); 1022 assert(fixup_module_field_list() != nullptr, "fixup_module_field_list not initialized"); 1023 fixup_module_field_list()->push(k); 1024 } else { 1025 javabase_was_defined = true; 1026 } 1027 } 1028 1029 // If java.base was already defined then patch this particular class with java.base. 1030 if (javabase_was_defined) { 1031 ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry(); 1032 assert(javabase_entry != nullptr && javabase_entry->module() != nullptr, 1033 "Setting class module field, " JAVA_BASE_NAME " should be defined"); 1034 Handle javabase_handle(current, javabase_entry->module()); 1035 set_module(mirror(), javabase_handle()); 1036 } 1037 } else { 1038 assert(Universe::is_module_initialized() || 1039 (ModuleEntryTable::javabase_defined() && 1040 (module() == ModuleEntryTable::javabase_moduleEntry()->module())), 1041 "Incorrect java.lang.Module specification while creating mirror"); 1042 set_module(mirror(), module()); 1043 } 1044 } 1045 1046 // Statically allocate fixup lists because they always get created. 1047 void java_lang_Class::allocate_fixup_lists() { 1048 GrowableArray<Klass*>* mirror_list = 1049 new (mtClass) GrowableArray<Klass*>(40, mtClass); 1050 set_fixup_mirror_list(mirror_list); 1051 1052 GrowableArray<Klass*>* module_list = 1053 new (mtModule) GrowableArray<Klass*>(500, mtModule); 1054 set_fixup_module_field_list(module_list); 1055 } 1056 1057 void java_lang_Class::allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData, 1058 Handle& mirror, Handle& comp_mirror, TRAPS) { 1059 // Allocate mirror (java.lang.Class instance) 1060 oop mirror_oop = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(k, CHECK); 1061 mirror = Handle(THREAD, mirror_oop); 1062 1063 // Setup indirection from mirror->klass 1064 set_klass(mirror(), k); 1065 1066 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass()); 1067 assert(oop_size(mirror()) == mk->instance_size(k), "should have been set"); 1068 1069 set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror())); 1070 1071 // It might also have a component mirror. This mirror must already exist. 1072 if (k->is_array_klass()) { 1073 if (k->is_flatArray_klass()) { 1074 Klass* element_klass = (Klass*) FlatArrayKlass::cast(k)->element_klass(); 1075 assert(element_klass->is_inline_klass(), "Must be inline type component"); 1076 if (is_scratch) { 1077 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass)); 1078 } else { 1079 comp_mirror = Handle(THREAD, element_klass->java_mirror()); 1080 } 1081 } else if (k->is_typeArray_klass()) { 1082 BasicType type = TypeArrayKlass::cast(k)->element_type(); 1083 if (is_scratch) { 1084 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(type)); 1085 } else { 1086 comp_mirror = Handle(THREAD, Universe::java_mirror(type)); 1087 } 1088 } else { 1089 assert(k->is_objArray_klass(), "Must be"); 1090 Klass* element_klass = ObjArrayKlass::cast(k)->element_klass(); 1091 assert(element_klass != nullptr, "Must have an element klass"); 1092 oop comp_oop = element_klass->java_mirror(); 1093 if (is_scratch) { 1094 comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass)); 1095 } else { 1096 comp_mirror = Handle(THREAD, comp_oop); 1097 } 1098 } 1099 assert(comp_mirror() != nullptr, "must have a mirror"); 1100 1101 // Two-way link between the array klass and its component mirror: 1102 // (array_klass) k -> mirror -> component_mirror -> array_klass -> k 1103 set_component_mirror(mirror(), comp_mirror()); 1104 // See below for ordering dependencies between field array_klass in component mirror 1105 // and java_mirror in this klass. 1106 } else { 1107 assert(k->is_instance_klass(), "Must be"); 1108 1109 initialize_mirror_fields(k, mirror, protection_domain, classData, THREAD); 1110 if (HAS_PENDING_EXCEPTION) { 1111 // If any of the fields throws an exception like OOM remove the klass field 1112 // from the mirror so GC doesn't follow it after the klass has been deallocated. 1113 // This mirror looks like a primitive type, which logically it is because it 1114 // it represents no class. 1115 set_klass(mirror(), nullptr); 1116 return; 1117 } 1118 } 1119 } 1120 1121 void java_lang_Class::create_mirror(Klass* k, Handle class_loader, 1122 Handle module, Handle protection_domain, 1123 Handle classData, TRAPS) { 1124 assert(k != nullptr, "Use create_basic_type_mirror for primitive types"); 1125 assert(k->java_mirror() == nullptr, "should only assign mirror once"); 1126 1127 // Class_klass has to be loaded because it is used to allocate 1128 // the mirror. 1129 if (vmClasses::Class_klass_loaded()) { 1130 Handle mirror; 1131 Handle comp_mirror; 1132 1133 allocate_mirror(k, /*is_scratch=*/false, protection_domain, classData, mirror, comp_mirror, CHECK); 1134 1135 // set the classLoader field in the java_lang_Class instance 1136 assert(class_loader() == k->class_loader(), "should be same"); 1137 set_class_loader(mirror(), class_loader()); 1138 1139 // Setup indirection from klass->mirror 1140 // after any exceptions can happen during allocations. 1141 k->set_java_mirror(mirror); 1142 1143 // Set the module field in the java_lang_Class instance. This must be done 1144 // after the mirror is set. 1145 set_mirror_module_field(THREAD, k, mirror, module); 1146 1147 if (comp_mirror() != nullptr) { 1148 // Set after k->java_mirror() is published, because compiled code running 1149 // concurrently doesn't expect a k to have a null java_mirror. 1150 release_set_array_klass(comp_mirror(), k); 1151 } 1152 1153 if (CDSConfig::is_dumping_heap()) { 1154 create_scratch_mirror(k, CHECK); 1155 } 1156 } else { 1157 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized"); 1158 fixup_mirror_list()->push(k); 1159 } 1160 } 1161 1162 #if INCLUDE_CDS_JAVA_HEAP 1163 // The "scratch mirror" stores the states of the mirror object that can be 1164 // decided at dump time (such as the initial values of the static fields, the 1165 // component mirror, etc). At runtime, more information is added to it by 1166 // java_lang_Class::restore_archived_mirror(). 1167 // 1168 // Essentially, /*dumptime*/create_scratch_mirror() + /*runtime*/restore_archived_mirror() 1169 // produces the same result as /*runtime*/create_mirror(). 1170 // 1171 // Note: we archive the "scratch mirror" instead of k->java_mirror(), because the 1172 // latter may contain dumptime-specific information that cannot be archived 1173 // (e.g., ClassLoaderData*, or static fields that are modified by Java code execution). 1174 void java_lang_Class::create_scratch_mirror(Klass* k, TRAPS) { 1175 if ((k->class_loader() != nullptr && 1176 k->class_loader() != SystemDictionary::java_platform_loader() && 1177 k->class_loader() != SystemDictionary::java_system_loader())) { 1178 // We only archive the mirrors of classes loaded by the built-in loaders 1179 return; 1180 } 1181 1182 Handle protection_domain, classData; // set to null. Will be reinitialized at runtime 1183 Handle mirror; 1184 Handle comp_mirror; 1185 allocate_mirror(k, /*is_scratch=*/true, protection_domain, classData, mirror, comp_mirror, CHECK); 1186 1187 if (comp_mirror() != nullptr) { 1188 release_set_array_klass(comp_mirror(), k); 1189 } 1190 1191 HeapShared::set_scratch_java_mirror(k, mirror()); 1192 } 1193 1194 // Returns true if the mirror is updated, false if no archived mirror 1195 // data is present. After the archived mirror object is restored, the 1196 // shared klass' _has_raw_archived_mirror flag is cleared. 1197 bool java_lang_Class::restore_archived_mirror(Klass *k, 1198 Handle class_loader, Handle module, 1199 Handle protection_domain, TRAPS) { 1200 // Postpone restoring archived mirror until java.lang.Class is loaded. Please 1201 // see more details in vmClasses::resolve_all(). 1202 if (!vmClasses::Class_klass_loaded()) { 1203 assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized"); 1204 fixup_mirror_list()->push(k); 1205 return true; 1206 } 1207 1208 oop m = k->archived_java_mirror(); 1209 assert(m != nullptr, "must have stored non-null archived mirror"); 1210 1211 // Sanity: clear it now to prevent re-initialization if any of the following fails 1212 k->clear_archived_mirror_index(); 1213 1214 // mirror is archived, restore 1215 log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m)); 1216 assert(as_Klass(m) == k, "must be"); 1217 Handle mirror(THREAD, m); 1218 1219 if (!k->is_array_klass()) { 1220 // - local static final fields with initial values were initialized at dump time 1221 1222 // create the init_lock 1223 typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false)); 1224 set_init_lock(mirror(), r); 1225 1226 if (protection_domain.not_null()) { 1227 set_protection_domain(mirror(), protection_domain()); 1228 } 1229 } 1230 1231 assert(class_loader() == k->class_loader(), "should be same"); 1232 if (class_loader.not_null()) { 1233 set_class_loader(mirror(), class_loader()); 1234 } 1235 1236 k->set_java_mirror(mirror); 1237 1238 set_mirror_module_field(THREAD, k, mirror, module); 1239 1240 if (log_is_enabled(Trace, cds, heap, mirror)) { 1241 ResourceMark rm(THREAD); 1242 log_trace(cds, heap, mirror)( 1243 "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror())); 1244 } 1245 1246 return true; 1247 } 1248 #endif // INCLUDE_CDS_JAVA_HEAP 1249 1250 void java_lang_Class::fixup_module_field(Klass* k, Handle module) { 1251 assert(_module_offset != 0, "must have been computed already"); 1252 set_module(k->java_mirror(), module()); 1253 } 1254 1255 void java_lang_Class::set_oop_size(HeapWord* java_class, size_t size) { 1256 assert(_oop_size_offset != 0, "must be set"); 1257 assert(size > 0, "Oop size must be greater than zero, not " SIZE_FORMAT, size); 1258 assert(size <= INT_MAX, "Lossy conversion: " SIZE_FORMAT, size); 1259 *(int*)(((char*)java_class) + _oop_size_offset) = (int)size; 1260 } 1261 1262 int java_lang_Class::static_oop_field_count(oop java_class) { 1263 assert(_static_oop_field_count_offset != 0, "must be set"); 1264 return java_class->int_field(_static_oop_field_count_offset); 1265 } 1266 1267 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) { 1268 assert(_static_oop_field_count_offset != 0, "must be set"); 1269 java_class->int_field_put(_static_oop_field_count_offset, size); 1270 } 1271 1272 oop java_lang_Class::protection_domain(oop java_class) { 1273 assert(_protection_domain_offset != 0, "must be set"); 1274 return java_class->obj_field(_protection_domain_offset); 1275 } 1276 void java_lang_Class::set_protection_domain(oop java_class, oop pd) { 1277 assert(_protection_domain_offset != 0, "must be set"); 1278 java_class->obj_field_put(_protection_domain_offset, pd); 1279 } 1280 1281 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) { 1282 assert(_component_mirror_offset != 0, "must be set"); 1283 java_class->obj_field_put(_component_mirror_offset, comp_mirror); 1284 } 1285 oop java_lang_Class::component_mirror(oop java_class) { 1286 assert(_component_mirror_offset != 0, "must be set"); 1287 return java_class->obj_field(_component_mirror_offset); 1288 } 1289 1290 oop java_lang_Class::init_lock(oop java_class) { 1291 assert(_init_lock_offset != 0, "must be set"); 1292 return java_class->obj_field(_init_lock_offset); 1293 } 1294 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) { 1295 assert(_init_lock_offset != 0, "must be set"); 1296 java_class->obj_field_put(_init_lock_offset, init_lock); 1297 } 1298 1299 objArrayOop java_lang_Class::signers(oop java_class) { 1300 assert(_signers_offset != 0, "must be set"); 1301 return (objArrayOop)java_class->obj_field(_signers_offset); 1302 } 1303 1304 oop java_lang_Class::class_data(oop java_class) { 1305 assert(_classData_offset != 0, "must be set"); 1306 return java_class->obj_field(_classData_offset); 1307 } 1308 void java_lang_Class::set_class_data(oop java_class, oop class_data) { 1309 assert(_classData_offset != 0, "must be set"); 1310 java_class->obj_field_put(_classData_offset, class_data); 1311 } 1312 1313 void java_lang_Class::set_reflection_data(oop java_class, oop reflection_data) { 1314 assert(_reflectionData_offset != 0, "must be set"); 1315 java_class->obj_field_put(_reflectionData_offset, reflection_data); 1316 } 1317 1318 void java_lang_Class::set_class_loader(oop java_class, oop loader) { 1319 assert(_class_loader_offset != 0, "offsets should have been initialized"); 1320 java_class->obj_field_put(_class_loader_offset, loader); 1321 } 1322 1323 oop java_lang_Class::class_loader(oop java_class) { 1324 assert(_class_loader_offset != 0, "must be set"); 1325 return java_class->obj_field(_class_loader_offset); 1326 } 1327 1328 oop java_lang_Class::module(oop java_class) { 1329 assert(_module_offset != 0, "must be set"); 1330 return java_class->obj_field(_module_offset); 1331 } 1332 1333 void java_lang_Class::set_module(oop java_class, oop module) { 1334 assert(_module_offset != 0, "must be set"); 1335 java_class->obj_field_put(_module_offset, module); 1336 } 1337 1338 oop java_lang_Class::name(Handle java_class, TRAPS) { 1339 assert(_name_offset != 0, "must be set"); 1340 oop o = java_class->obj_field(_name_offset); 1341 if (o == nullptr) { 1342 o = StringTable::intern(as_external_name(java_class()), THREAD); 1343 java_class->obj_field_put(_name_offset, o); 1344 } 1345 return o; 1346 } 1347 1348 oop java_lang_Class::source_file(oop java_class) { 1349 assert(_source_file_offset != 0, "must be set"); 1350 return java_class->obj_field(_source_file_offset); 1351 } 1352 1353 void java_lang_Class::set_source_file(oop java_class, oop source_file) { 1354 assert(_source_file_offset != 0, "must be set"); 1355 java_class->obj_field_put(_source_file_offset, source_file); 1356 } 1357 1358 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) { 1359 // This should be improved by adding a field at the Java level or by 1360 // introducing a new VM klass (see comment in ClassFileParser) 1361 oop java_class = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(nullptr, CHECK_NULL); 1362 if (type != T_VOID) { 1363 Klass* aklass = Universe::typeArrayKlass(type); 1364 assert(aklass != nullptr, "correct bootstrap"); 1365 release_set_array_klass(java_class, aklass); 1366 } 1367 #ifdef ASSERT 1368 InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(vmClasses::Class_klass()); 1369 assert(static_oop_field_count(java_class) == 0, "should have been zeroed by allocation"); 1370 #endif 1371 return java_class; 1372 } 1373 1374 void java_lang_Class::set_klass(oop java_class, Klass* klass) { 1375 assert(is_instance(java_class), "must be a Class object"); 1376 java_class->metadata_field_put(_klass_offset, klass); 1377 } 1378 1379 1380 void java_lang_Class::print_signature(oop java_class, outputStream* st) { 1381 assert(is_instance(java_class), "must be a Class object"); 1382 Symbol* name = nullptr; 1383 bool is_instance = false; 1384 if (is_primitive(java_class)) { 1385 name = vmSymbols::type_signature(primitive_type(java_class)); 1386 } else { 1387 Klass* k = as_Klass(java_class); 1388 is_instance = k->is_instance_klass(); 1389 name = k->name(); 1390 } 1391 if (name == nullptr) { 1392 st->print("<null>"); 1393 return; 1394 } 1395 if (is_instance) { 1396 st->print("L"); 1397 } 1398 st->write((char*) name->base(), (int) name->utf8_length()); 1399 if (is_instance) st->print(";"); 1400 } 1401 1402 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) { 1403 assert(is_instance(java_class), "must be a Class object"); 1404 Symbol* name; 1405 if (is_primitive(java_class)) { 1406 name = vmSymbols::type_signature(primitive_type(java_class)); 1407 // Because this can create a new symbol, the caller has to decrement 1408 // the refcount, so make adjustment here and below for symbols returned 1409 // that are not created or incremented due to a successful lookup. 1410 name->increment_refcount(); 1411 } else { 1412 Klass* k = as_Klass(java_class); 1413 if (!k->is_instance_klass()) { 1414 name = k->name(); 1415 name->increment_refcount(); 1416 } else { 1417 ResourceMark rm; 1418 const char* sigstr = k->signature_name(); 1419 int siglen = (int) strlen(sigstr); 1420 if (!intern_if_not_found) { 1421 name = SymbolTable::probe(sigstr, siglen); 1422 } else { 1423 name = SymbolTable::new_symbol(sigstr, siglen); 1424 } 1425 } 1426 } 1427 return name; 1428 } 1429 1430 // Returns the Java name for this Java mirror (Resource allocated) 1431 // See Klass::external_name(). 1432 // For primitive type Java mirrors, its type name is returned. 1433 const char* java_lang_Class::as_external_name(oop java_class) { 1434 assert(is_instance(java_class), "must be a Class object"); 1435 const char* name = nullptr; 1436 if (is_primitive(java_class)) { 1437 name = type2name(primitive_type(java_class)); 1438 } else { 1439 name = as_Klass(java_class)->external_name(); 1440 } 1441 if (name == nullptr) { 1442 name = "<null>"; 1443 } 1444 return name; 1445 } 1446 1447 Klass* java_lang_Class::array_klass_acquire(oop java_class) { 1448 Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset)); 1449 assert(k == nullptr || (k->is_klass() && k->is_array_klass()), "should be array klass"); 1450 return k; 1451 } 1452 1453 1454 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) { 1455 assert(klass->is_klass() && klass->is_array_klass(), "should be array klass"); 1456 if (klass->is_flatArray_klass() || (klass->is_objArray_klass() && ObjArrayKlass::cast(klass)->is_null_free_array_klass())) { 1457 // TODO 8336006 Ignore flat / null-free arrays 1458 return; 1459 } 1460 java_class->release_metadata_field_put(_array_klass_offset, klass); 1461 } 1462 1463 1464 BasicType java_lang_Class::primitive_type(oop java_class) { 1465 assert(is_primitive(java_class), "just checking"); 1466 Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset)); 1467 BasicType type = T_VOID; 1468 if (ak != nullptr) { 1469 // Note: create_basic_type_mirror above initializes ak to a non-null value. 1470 type = ArrayKlass::cast(ak)->element_type(); 1471 } else { 1472 assert(java_class == Universe::void_mirror(), "only valid non-array primitive"); 1473 } 1474 #ifdef ASSERT 1475 if (CDSConfig::is_dumping_heap()) { 1476 oop mirror = Universe::java_mirror(type); 1477 oop scratch_mirror = HeapShared::scratch_java_mirror(type); 1478 assert(java_class == mirror || java_class == scratch_mirror, "must be consistent"); 1479 } else { 1480 assert(Universe::java_mirror(type) == java_class, "must be consistent"); 1481 } 1482 #endif 1483 return type; 1484 } 1485 1486 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) { 1487 assert(is_instance(java_class), "must be a Class object"); 1488 if (is_primitive(java_class)) { 1489 if (reference_klass != nullptr) 1490 (*reference_klass) = nullptr; 1491 return primitive_type(java_class); 1492 } else { 1493 if (reference_klass != nullptr) 1494 (*reference_klass) = as_Klass(java_class); 1495 return T_OBJECT; 1496 } 1497 } 1498 1499 1500 oop java_lang_Class::primitive_mirror(BasicType t) { 1501 oop mirror = Universe::java_mirror(t); 1502 assert(mirror != nullptr && mirror->is_a(vmClasses::Class_klass()), "must be a Class"); 1503 assert(is_primitive(mirror), "must be primitive"); 1504 return mirror; 1505 } 1506 1507 #define CLASS_FIELDS_DO(macro) \ 1508 macro(_classRedefinedCount_offset, k, "classRedefinedCount", int_signature, false); \ 1509 macro(_class_loader_offset, k, "classLoader", classloader_signature, false); \ 1510 macro(_component_mirror_offset, k, "componentType", class_signature, false); \ 1511 macro(_module_offset, k, "module", module_signature, false); \ 1512 macro(_name_offset, k, "name", string_signature, false); \ 1513 macro(_classData_offset, k, "classData", object_signature, false); \ 1514 macro(_reflectionData_offset, k, "reflectionData", java_lang_ref_SoftReference_signature, false); \ 1515 macro(_signers_offset, k, "signers", object_array_signature, false); 1516 1517 void java_lang_Class::compute_offsets() { 1518 if (_offsets_computed) { 1519 return; 1520 } 1521 1522 _offsets_computed = true; 1523 1524 InstanceKlass* k = vmClasses::Class_klass(); 1525 CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1526 CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 1527 } 1528 1529 #if INCLUDE_CDS 1530 void java_lang_Class::serialize_offsets(SerializeClosure* f) { 1531 f->do_bool(&_offsets_computed); 1532 1533 CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1534 1535 CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 1536 } 1537 #endif 1538 1539 int java_lang_Class::classRedefinedCount(oop the_class_mirror) { 1540 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized"); 1541 return the_class_mirror->int_field(_classRedefinedCount_offset); 1542 } 1543 1544 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) { 1545 assert(_classRedefinedCount_offset != 0, "offsets should have been initialized"); 1546 the_class_mirror->int_field_put(_classRedefinedCount_offset, value); 1547 } 1548 1549 1550 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the 1551 // platform thread structure, and a eetop offset which was used for thread 1552 // local storage (and unused by the HotSpot VM). In JDK1.2 the two structures 1553 // merged, so in the HotSpot VM we just use the eetop field for the thread 1554 // instead of the privateInfo_offset. 1555 // 1556 // Note: The stackSize field is only present starting in 1.4. 1557 1558 int java_lang_Thread_FieldHolder::_group_offset; 1559 int java_lang_Thread_FieldHolder::_priority_offset; 1560 int java_lang_Thread_FieldHolder::_stackSize_offset; 1561 int java_lang_Thread_FieldHolder::_daemon_offset; 1562 int java_lang_Thread_FieldHolder::_thread_status_offset; 1563 1564 #define THREAD_FIELD_HOLDER_FIELDS_DO(macro) \ 1565 macro(_group_offset, k, vmSymbols::group_name(), threadgroup_signature, false); \ 1566 macro(_priority_offset, k, vmSymbols::priority_name(), int_signature, false); \ 1567 macro(_stackSize_offset, k, "stackSize", long_signature, false); \ 1568 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); \ 1569 macro(_thread_status_offset, k, "threadStatus", int_signature, false) 1570 1571 void java_lang_Thread_FieldHolder::compute_offsets() { 1572 assert(_group_offset == 0, "offsets should be initialized only once"); 1573 1574 InstanceKlass* k = vmClasses::Thread_FieldHolder_klass(); 1575 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1576 } 1577 1578 #if INCLUDE_CDS 1579 void java_lang_Thread_FieldHolder::serialize_offsets(SerializeClosure* f) { 1580 THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1581 } 1582 #endif 1583 1584 oop java_lang_Thread_FieldHolder::threadGroup(oop holder) { 1585 return holder->obj_field(_group_offset); 1586 } 1587 1588 ThreadPriority java_lang_Thread_FieldHolder::priority(oop holder) { 1589 return (ThreadPriority)holder->int_field(_priority_offset); 1590 } 1591 1592 void java_lang_Thread_FieldHolder::set_priority(oop holder, ThreadPriority priority) { 1593 holder->int_field_put(_priority_offset, priority); 1594 } 1595 1596 jlong java_lang_Thread_FieldHolder::stackSize(oop holder) { 1597 return holder->long_field(_stackSize_offset); 1598 } 1599 1600 bool java_lang_Thread_FieldHolder::is_daemon(oop holder) { 1601 return holder->bool_field(_daemon_offset) != 0; 1602 } 1603 1604 void java_lang_Thread_FieldHolder::set_daemon(oop holder, bool val) { 1605 assert(val, "daemon status is never turned off"); 1606 holder->bool_field_put(_daemon_offset, val); 1607 } 1608 1609 void java_lang_Thread_FieldHolder::set_thread_status(oop holder, JavaThreadStatus status) { 1610 holder->int_field_put(_thread_status_offset, static_cast<int>(status)); 1611 } 1612 1613 JavaThreadStatus java_lang_Thread_FieldHolder::get_thread_status(oop holder) { 1614 return static_cast<JavaThreadStatus>(holder->int_field(_thread_status_offset)); 1615 } 1616 1617 1618 int java_lang_Thread_Constants::_static_VTHREAD_GROUP_offset = 0; 1619 1620 #define THREAD_CONSTANTS_STATIC_FIELDS_DO(macro) \ 1621 macro(_static_VTHREAD_GROUP_offset, k, "VTHREAD_GROUP", threadgroup_signature, true); 1622 1623 void java_lang_Thread_Constants::compute_offsets() { 1624 assert(_static_VTHREAD_GROUP_offset == 0, "offsets should be initialized only once"); 1625 1626 InstanceKlass* k = vmClasses::Thread_Constants_klass(); 1627 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1628 } 1629 1630 #if INCLUDE_CDS 1631 void java_lang_Thread_Constants::serialize_offsets(SerializeClosure* f) { 1632 THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1633 } 1634 #endif 1635 1636 oop java_lang_Thread_Constants::get_VTHREAD_GROUP() { 1637 InstanceKlass* k = vmClasses::Thread_Constants_klass(); 1638 oop base = k->static_field_base_raw(); 1639 return base->obj_field(_static_VTHREAD_GROUP_offset); 1640 } 1641 1642 1643 int java_lang_Thread::_holder_offset; 1644 int java_lang_Thread::_name_offset; 1645 int java_lang_Thread::_contextClassLoader_offset; 1646 int java_lang_Thread::_eetop_offset; 1647 int java_lang_Thread::_jvmti_thread_state_offset; 1648 int java_lang_Thread::_jvmti_VTMS_transition_disable_count_offset; 1649 int java_lang_Thread::_jvmti_is_in_VTMS_transition_offset; 1650 int java_lang_Thread::_interrupted_offset; 1651 int java_lang_Thread::_interruptLock_offset; 1652 int java_lang_Thread::_tid_offset; 1653 int java_lang_Thread::_continuation_offset; 1654 int java_lang_Thread::_park_blocker_offset; 1655 int java_lang_Thread::_scopedValueBindings_offset; 1656 JFR_ONLY(int java_lang_Thread::_jfr_epoch_offset;) 1657 1658 #define THREAD_FIELDS_DO(macro) \ 1659 macro(_holder_offset, k, "holder", thread_fieldholder_signature, false); \ 1660 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 1661 macro(_contextClassLoader_offset, k, "contextClassLoader", classloader_signature, false); \ 1662 macro(_eetop_offset, k, "eetop", long_signature, false); \ 1663 macro(_interrupted_offset, k, "interrupted", bool_signature, false); \ 1664 macro(_interruptLock_offset, k, "interruptLock", object_signature, false); \ 1665 macro(_tid_offset, k, "tid", long_signature, false); \ 1666 macro(_park_blocker_offset, k, "parkBlocker", object_signature, false); \ 1667 macro(_continuation_offset, k, "cont", continuation_signature, false); \ 1668 macro(_scopedValueBindings_offset, k, "scopedValueBindings", object_signature, false); 1669 1670 void java_lang_Thread::compute_offsets() { 1671 assert(_holder_offset == 0, "offsets should be initialized only once"); 1672 1673 InstanceKlass* k = vmClasses::Thread_klass(); 1674 THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 1675 THREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 1676 } 1677 1678 #if INCLUDE_CDS 1679 void java_lang_Thread::serialize_offsets(SerializeClosure* f) { 1680 THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 1681 THREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 1682 } 1683 #endif 1684 1685 JavaThread* java_lang_Thread::thread(oop java_thread) { 1686 return reinterpret_cast<JavaThread*>(java_thread->address_field(_eetop_offset)); 1687 } 1688 1689 JavaThread* java_lang_Thread::thread_acquire(oop java_thread) { 1690 return reinterpret_cast<JavaThread*>(java_thread->address_field_acquire(_eetop_offset)); 1691 } 1692 1693 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) { 1694 java_thread->address_field_put(_eetop_offset, (address)thread); 1695 } 1696 1697 void java_lang_Thread::release_set_thread(oop java_thread, JavaThread* thread) { 1698 java_thread->release_address_field_put(_eetop_offset, (address)thread); 1699 } 1700 1701 JvmtiThreadState* java_lang_Thread::jvmti_thread_state(oop java_thread) { 1702 return (JvmtiThreadState*)java_thread->address_field(_jvmti_thread_state_offset); 1703 } 1704 1705 void java_lang_Thread::set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state) { 1706 java_thread->address_field_put(_jvmti_thread_state_offset, (address)state); 1707 } 1708 1709 int java_lang_Thread::VTMS_transition_disable_count(oop java_thread) { 1710 return java_thread->int_field(_jvmti_VTMS_transition_disable_count_offset); 1711 } 1712 1713 void java_lang_Thread::inc_VTMS_transition_disable_count(oop java_thread) { 1714 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked"); 1715 int val = VTMS_transition_disable_count(java_thread); 1716 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val + 1); 1717 } 1718 1719 void java_lang_Thread::dec_VTMS_transition_disable_count(oop java_thread) { 1720 assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked"); 1721 int val = VTMS_transition_disable_count(java_thread); 1722 assert(val > 0, "VTMS_transition_disable_count should never be negative"); 1723 java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val - 1); 1724 } 1725 1726 bool java_lang_Thread::is_in_VTMS_transition(oop java_thread) { 1727 return java_thread->bool_field_volatile(_jvmti_is_in_VTMS_transition_offset); 1728 } 1729 1730 void java_lang_Thread::set_is_in_VTMS_transition(oop java_thread, bool val) { 1731 assert(is_in_VTMS_transition(java_thread) != val, "already %s transition", val ? "inside" : "outside"); 1732 java_thread->bool_field_put_volatile(_jvmti_is_in_VTMS_transition_offset, val); 1733 } 1734 1735 int java_lang_Thread::is_in_VTMS_transition_offset() { 1736 return _jvmti_is_in_VTMS_transition_offset; 1737 } 1738 1739 void java_lang_Thread::clear_scopedValueBindings(oop java_thread) { 1740 assert(java_thread != nullptr, "need a java_lang_Thread pointer here"); 1741 java_thread->obj_field_put(_scopedValueBindings_offset, nullptr); 1742 } 1743 1744 oop java_lang_Thread::holder(oop java_thread) { 1745 // Note: may return null if the thread is still attaching 1746 return java_thread->obj_field(_holder_offset); 1747 } 1748 oop java_lang_Thread::interrupt_lock(oop java_thread) { 1749 return java_thread->obj_field(_interruptLock_offset); 1750 } 1751 1752 bool java_lang_Thread::interrupted(oop java_thread) { 1753 // Make sure the caller can safely access oops. 1754 assert(Thread::current()->is_VM_thread() || 1755 (JavaThread::current()->thread_state() != _thread_blocked && 1756 JavaThread::current()->thread_state() != _thread_in_native), 1757 "Unsafe access to oop"); 1758 return java_thread->bool_field_volatile(_interrupted_offset); 1759 } 1760 1761 void java_lang_Thread::set_interrupted(oop java_thread, bool val) { 1762 // Make sure the caller can safely access oops. 1763 assert(Thread::current()->is_VM_thread() || 1764 (JavaThread::current()->thread_state() != _thread_blocked && 1765 JavaThread::current()->thread_state() != _thread_in_native), 1766 "Unsafe access to oop"); 1767 java_thread->bool_field_put_volatile(_interrupted_offset, val); 1768 } 1769 1770 1771 oop java_lang_Thread::name(oop java_thread) { 1772 return java_thread->obj_field(_name_offset); 1773 } 1774 1775 1776 void java_lang_Thread::set_name(oop java_thread, oop name) { 1777 java_thread->obj_field_put(_name_offset, name); 1778 } 1779 1780 // Convenience macros for setting and getting Thread fields that 1781 // are actually stored in the FieldHolder object of the thread. 1782 // The FieldHolder can be null whilst a thread is attaching via 1783 // JNI, and when the main thread is attaching. 1784 1785 // The default value should be the default/zero initialized value 1786 // of the field as it would be in java.lang.Thread.FieldHolder. 1787 #define GET_FIELDHOLDER_FIELD(java_thread, field, default_val) \ 1788 { \ 1789 oop holder = java_lang_Thread::holder(java_thread); \ 1790 if (holder != nullptr) \ 1791 return java_lang_Thread_FieldHolder::field(holder); \ 1792 else \ 1793 return default_val; \ 1794 } 1795 1796 // We should never be trying to set a field of an attaching thread. 1797 #define SET_FIELDHOLDER_FIELD(java_thread, field, value) \ 1798 { \ 1799 oop holder = java_lang_Thread::holder(java_thread); \ 1800 assert(holder != nullptr, "Thread not fully initialized"); \ 1801 java_lang_Thread_FieldHolder::set_##field(holder, value); \ 1802 } 1803 1804 1805 ThreadPriority java_lang_Thread::priority(oop java_thread) { 1806 GET_FIELDHOLDER_FIELD(java_thread, priority, (ThreadPriority)0); 1807 } 1808 1809 1810 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) { 1811 SET_FIELDHOLDER_FIELD(java_thread, priority, priority) 1812 } 1813 1814 1815 oop java_lang_Thread::threadGroup(oop java_thread) { 1816 GET_FIELDHOLDER_FIELD(java_thread, threadGroup, nullptr); 1817 } 1818 1819 1820 bool java_lang_Thread::is_alive(oop java_thread) { 1821 JavaThread* thr = java_lang_Thread::thread(java_thread); 1822 return (thr != nullptr); 1823 } 1824 1825 1826 bool java_lang_Thread::is_daemon(oop java_thread) { 1827 GET_FIELDHOLDER_FIELD(java_thread, is_daemon, false); 1828 } 1829 1830 1831 void java_lang_Thread::set_daemon(oop java_thread) { 1832 SET_FIELDHOLDER_FIELD(java_thread, daemon, true); 1833 } 1834 1835 oop java_lang_Thread::context_class_loader(oop java_thread) { 1836 return java_thread->obj_field(_contextClassLoader_offset); 1837 } 1838 1839 1840 jlong java_lang_Thread::stackSize(oop java_thread) { 1841 GET_FIELDHOLDER_FIELD(java_thread, stackSize, 0); 1842 } 1843 1844 // Write the thread status value to threadStatus field in java.lang.Thread java class. 1845 void java_lang_Thread::set_thread_status(oop java_thread, JavaThreadStatus status) { 1846 SET_FIELDHOLDER_FIELD(java_thread, thread_status, status); 1847 } 1848 1849 // Read thread status value from threadStatus field in java.lang.Thread java class. 1850 JavaThreadStatus java_lang_Thread::get_thread_status(oop java_thread) { 1851 // Make sure the caller is operating on behalf of the VM or is 1852 // running VM code (state == _thread_in_vm). 1853 assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() || 1854 JavaThread::current()->thread_state() == _thread_in_vm, 1855 "Java Thread is not running in vm"); 1856 GET_FIELDHOLDER_FIELD(java_thread, get_thread_status, JavaThreadStatus::NEW /* not initialized */); 1857 } 1858 1859 ByteSize java_lang_Thread::thread_id_offset() { 1860 return in_ByteSize(_tid_offset); 1861 } 1862 1863 oop java_lang_Thread::park_blocker(oop java_thread) { 1864 return java_thread->obj_field(_park_blocker_offset); 1865 } 1866 1867 oop java_lang_Thread::async_get_stack_trace(oop java_thread, TRAPS) { 1868 ThreadsListHandle tlh(JavaThread::current()); 1869 JavaThread* thread; 1870 bool is_virtual = java_lang_VirtualThread::is_instance(java_thread); 1871 if (is_virtual) { 1872 oop carrier_thread = java_lang_VirtualThread::carrier_thread(java_thread); 1873 if (carrier_thread == nullptr) { 1874 return nullptr; 1875 } 1876 thread = java_lang_Thread::thread(carrier_thread); 1877 } else { 1878 thread = java_lang_Thread::thread(java_thread); 1879 } 1880 if (thread == nullptr) { 1881 return nullptr; 1882 } 1883 1884 class GetStackTraceClosure : public HandshakeClosure { 1885 public: 1886 const Handle _java_thread; 1887 int _depth; 1888 bool _retry_handshake; 1889 GrowableArray<Method*>* _methods; 1890 GrowableArray<int>* _bcis; 1891 1892 GetStackTraceClosure(Handle java_thread) : 1893 HandshakeClosure("GetStackTraceClosure"), _java_thread(java_thread), _depth(0), _retry_handshake(false), 1894 _methods(nullptr), _bcis(nullptr) { 1895 } 1896 ~GetStackTraceClosure() { 1897 delete _methods; 1898 delete _bcis; 1899 } 1900 1901 bool read_reset_retry() { 1902 bool ret = _retry_handshake; 1903 // If we re-execute the handshake this method need to return false 1904 // when the handshake cannot be performed. (E.g. thread terminating) 1905 _retry_handshake = false; 1906 return ret; 1907 } 1908 1909 void do_thread(Thread* th) { 1910 if (!Thread::current()->is_Java_thread()) { 1911 _retry_handshake = true; 1912 return; 1913 } 1914 1915 JavaThread* thread = JavaThread::cast(th); 1916 1917 if (!thread->has_last_Java_frame()) { 1918 return; 1919 } 1920 1921 bool carrier = false; 1922 if (java_lang_VirtualThread::is_instance(_java_thread())) { 1923 // if (thread->vthread() != _java_thread()) // We might be inside a System.executeOnCarrierThread 1924 const ContinuationEntry* ce = thread->vthread_continuation(); 1925 if (ce == nullptr || ce->cont_oop(thread) != java_lang_VirtualThread::continuation(_java_thread())) { 1926 return; // not mounted 1927 } 1928 } else { 1929 carrier = (thread->vthread_continuation() != nullptr); 1930 } 1931 1932 const int max_depth = MaxJavaStackTraceDepth; 1933 const bool skip_hidden = !ShowHiddenFrames; 1934 1935 // Pick minimum length that will cover most cases 1936 int init_length = 64; 1937 _methods = new (mtInternal) GrowableArray<Method*>(init_length, mtInternal); 1938 _bcis = new (mtInternal) GrowableArray<int>(init_length, mtInternal); 1939 1940 int total_count = 0; 1941 for (vframeStream vfst(thread, false, false, carrier); // we don't process frames as we don't care about oops 1942 !vfst.at_end() && (max_depth == 0 || max_depth != total_count); 1943 vfst.next()) { 1944 1945 if (skip_hidden && (vfst.method()->is_hidden() || 1946 vfst.method()->is_continuation_enter_intrinsic())) { 1947 continue; 1948 } 1949 1950 _methods->push(vfst.method()); 1951 _bcis->push(vfst.bci()); 1952 total_count++; 1953 } 1954 1955 _depth = total_count; 1956 } 1957 }; 1958 1959 // Handshake with target 1960 ResourceMark rm(THREAD); 1961 HandleMark hm(THREAD); 1962 GetStackTraceClosure gstc(Handle(THREAD, java_thread)); 1963 do { 1964 Handshake::execute(&gstc, &tlh, thread); 1965 } while (gstc.read_reset_retry()); 1966 1967 // Stop if no stack trace is found. 1968 if (gstc._depth == 0) { 1969 return nullptr; 1970 } 1971 1972 // Convert to StackTraceElement array 1973 InstanceKlass* k = vmClasses::StackTraceElement_klass(); 1974 assert(k != nullptr, "must be loaded in 1.4+"); 1975 if (k->should_be_initialized()) { 1976 k->initialize(CHECK_NULL); 1977 } 1978 objArrayHandle trace = oopFactory::new_objArray_handle(k, gstc._depth, CHECK_NULL); 1979 1980 for (int i = 0; i < gstc._depth; i++) { 1981 methodHandle method(THREAD, gstc._methods->at(i)); 1982 oop element = java_lang_StackTraceElement::create(method, 1983 gstc._bcis->at(i), 1984 CHECK_NULL); 1985 trace->obj_at_put(i, element); 1986 } 1987 1988 return trace(); 1989 } 1990 1991 const char* java_lang_Thread::thread_status_name(oop java_thread) { 1992 JavaThreadStatus status = get_thread_status(java_thread); 1993 switch (status) { 1994 case JavaThreadStatus::NEW : return "NEW"; 1995 case JavaThreadStatus::RUNNABLE : return "RUNNABLE"; 1996 case JavaThreadStatus::SLEEPING : return "TIMED_WAITING (sleeping)"; 1997 case JavaThreadStatus::IN_OBJECT_WAIT : return "WAITING (on object monitor)"; 1998 case JavaThreadStatus::IN_OBJECT_WAIT_TIMED : return "TIMED_WAITING (on object monitor)"; 1999 case JavaThreadStatus::PARKED : return "WAITING (parking)"; 2000 case JavaThreadStatus::PARKED_TIMED : return "TIMED_WAITING (parking)"; 2001 case JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)"; 2002 case JavaThreadStatus::TERMINATED : return "TERMINATED"; 2003 default : return "UNKNOWN"; 2004 }; 2005 } 2006 int java_lang_ThreadGroup::_parent_offset; 2007 int java_lang_ThreadGroup::_name_offset; 2008 int java_lang_ThreadGroup::_maxPriority_offset; 2009 int java_lang_ThreadGroup::_daemon_offset; 2010 2011 oop java_lang_ThreadGroup::parent(oop java_thread_group) { 2012 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 2013 return java_thread_group->obj_field(_parent_offset); 2014 } 2015 2016 // ("name as oop" accessor is not necessary) 2017 2018 const char* java_lang_ThreadGroup::name(oop java_thread_group) { 2019 oop name = java_thread_group->obj_field(_name_offset); 2020 // ThreadGroup.name can be null 2021 if (name != nullptr) { 2022 return java_lang_String::as_utf8_string(name); 2023 } 2024 return nullptr; 2025 } 2026 2027 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) { 2028 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 2029 return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset); 2030 } 2031 2032 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) { 2033 assert(oopDesc::is_oop(java_thread_group), "thread group must be oop"); 2034 return java_thread_group->bool_field(_daemon_offset) != 0; 2035 } 2036 2037 #define THREADGROUP_FIELDS_DO(macro) \ 2038 macro(_parent_offset, k, vmSymbols::parent_name(), threadgroup_signature, false); \ 2039 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 2040 macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature, false); \ 2041 macro(_daemon_offset, k, vmSymbols::daemon_name(), bool_signature, false); 2042 2043 void java_lang_ThreadGroup::compute_offsets() { 2044 assert(_parent_offset == 0, "offsets should be initialized only once"); 2045 2046 InstanceKlass* k = vmClasses::ThreadGroup_klass(); 2047 THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2048 } 2049 2050 #if INCLUDE_CDS 2051 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) { 2052 THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2053 } 2054 #endif 2055 2056 2057 // java_lang_VirtualThread 2058 2059 int java_lang_VirtualThread::static_vthread_scope_offset; 2060 int java_lang_VirtualThread::_carrierThread_offset; 2061 int java_lang_VirtualThread::_continuation_offset; 2062 int java_lang_VirtualThread::_state_offset; 2063 int java_lang_VirtualThread::_next_offset; 2064 int java_lang_VirtualThread::_onWaitingList_offset; 2065 int java_lang_VirtualThread::_notified_offset; 2066 int java_lang_VirtualThread::_timeout_offset; 2067 int java_lang_VirtualThread::_objectWaiter_offset; 2068 2069 #define VTHREAD_FIELDS_DO(macro) \ 2070 macro(static_vthread_scope_offset, k, "VTHREAD_SCOPE", continuationscope_signature, true); \ 2071 macro(_carrierThread_offset, k, "carrierThread", thread_signature, false); \ 2072 macro(_continuation_offset, k, "cont", continuation_signature, false); \ 2073 macro(_state_offset, k, "state", int_signature, false); \ 2074 macro(_next_offset, k, "next", vthread_signature, false); \ 2075 macro(_onWaitingList_offset, k, "onWaitingList", bool_signature, false); \ 2076 macro(_notified_offset, k, "notified", bool_signature, false); \ 2077 macro(_timeout_offset, k, "timeout", long_signature, false); 2078 2079 2080 void java_lang_VirtualThread::compute_offsets() { 2081 InstanceKlass* k = vmClasses::VirtualThread_klass(); 2082 VTHREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2083 VTHREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 2084 } 2085 2086 bool java_lang_VirtualThread::is_instance(oop obj) { 2087 return obj != nullptr && is_subclass(obj->klass()); 2088 } 2089 2090 oop java_lang_VirtualThread::carrier_thread(oop vthread) { 2091 oop thread = vthread->obj_field(_carrierThread_offset); 2092 return thread; 2093 } 2094 2095 oop java_lang_VirtualThread::continuation(oop vthread) { 2096 oop cont = vthread->obj_field(_continuation_offset); 2097 return cont; 2098 } 2099 2100 int java_lang_VirtualThread::state(oop vthread) { 2101 return vthread->int_field_acquire(_state_offset); 2102 } 2103 2104 void java_lang_VirtualThread::set_state(oop vthread, int state) { 2105 vthread->release_int_field_put(_state_offset, state); 2106 } 2107 2108 int java_lang_VirtualThread::cmpxchg_state(oop vthread, int old_state, int new_state) { 2109 jint* addr = vthread->field_addr<jint>(_state_offset); 2110 int res = Atomic::cmpxchg(addr, old_state, new_state); 2111 return res; 2112 } 2113 2114 oop java_lang_VirtualThread::next(oop vthread) { 2115 return vthread->obj_field(_next_offset); 2116 } 2117 2118 void java_lang_VirtualThread::set_next(oop vthread, oop next_vthread) { 2119 vthread->obj_field_put(_next_offset, next_vthread); 2120 } 2121 2122 // Add vthread to the waiting list if it's not already in it. Multiple threads 2123 // could be trying to add vthread to the list at the same time, so we control 2124 // access with a cmpxchg on onWaitingList. The winner adds vthread to the list. 2125 // Method returns true if we added vthread to the list, false otherwise. 2126 bool java_lang_VirtualThread::set_onWaitingList(oop vthread, OopHandle& list_head) { 2127 jboolean* addr = vthread->field_addr<jboolean>(_onWaitingList_offset); 2128 jboolean vthread_on_list = Atomic::load(addr); 2129 if (!vthread_on_list) { 2130 vthread_on_list = Atomic::cmpxchg(addr, (jboolean)JNI_FALSE, (jboolean)JNI_TRUE); 2131 if (!vthread_on_list) { 2132 for (;;) { 2133 oop head = list_head.resolve(); 2134 java_lang_VirtualThread::set_next(vthread, head); 2135 if (list_head.cmpxchg(head, vthread) == head) return true; 2136 } 2137 } 2138 } 2139 return false; // already on waiting list 2140 } 2141 2142 void java_lang_VirtualThread::set_notified(oop vthread, jboolean value) { 2143 vthread->bool_field_put_volatile(_notified_offset, value); 2144 } 2145 2146 jlong java_lang_VirtualThread::timeout(oop vthread) { 2147 return vthread->long_field(_timeout_offset); 2148 } 2149 2150 void java_lang_VirtualThread::set_timeout(oop vthread, jlong value) { 2151 vthread->long_field_put(_timeout_offset, value); 2152 } 2153 2154 JavaThreadStatus java_lang_VirtualThread::map_state_to_thread_status(int state) { 2155 JavaThreadStatus status = JavaThreadStatus::NEW; 2156 switch (state & ~SUSPENDED) { 2157 case NEW: 2158 status = JavaThreadStatus::NEW; 2159 break; 2160 case STARTED: 2161 case RUNNING: 2162 case PARKING: 2163 case TIMED_PARKING: 2164 case UNPARKED: 2165 case YIELDING: 2166 case YIELDED: 2167 case UNBLOCKED: 2168 case WAITING: 2169 case TIMED_WAITING: 2170 status = JavaThreadStatus::RUNNABLE; 2171 break; 2172 case PARKED: 2173 case PINNED: 2174 status = JavaThreadStatus::PARKED; 2175 break; 2176 case TIMED_PARKED: 2177 case TIMED_PINNED: 2178 status = JavaThreadStatus::PARKED_TIMED; 2179 break; 2180 case BLOCKING: 2181 case BLOCKED: 2182 status = JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER; 2183 break; 2184 case WAIT: 2185 status = JavaThreadStatus::IN_OBJECT_WAIT; 2186 break; 2187 case TIMED_WAIT: 2188 status = JavaThreadStatus::IN_OBJECT_WAIT_TIMED; 2189 break; 2190 case TERMINATED: 2191 status = JavaThreadStatus::TERMINATED; 2192 break; 2193 default: 2194 ShouldNotReachHere(); 2195 } 2196 return status; 2197 } 2198 2199 ObjectMonitor* java_lang_VirtualThread::current_pending_monitor(oop vthread) { 2200 ObjectWaiter* waiter = objectWaiter(vthread); 2201 if (waiter != nullptr && waiter->at_monitorenter()) { 2202 return waiter->monitor(); 2203 } 2204 return nullptr; 2205 } 2206 2207 ObjectMonitor* java_lang_VirtualThread::current_waiting_monitor(oop vthread) { 2208 ObjectWaiter* waiter = objectWaiter(vthread); 2209 if (waiter != nullptr && waiter->is_wait()) { 2210 return waiter->monitor(); 2211 } 2212 return nullptr; 2213 } 2214 2215 bool java_lang_VirtualThread::is_preempted(oop vthread) { 2216 oop continuation = java_lang_VirtualThread::continuation(vthread); 2217 assert(continuation != nullptr, "vthread with no continuation"); 2218 stackChunkOop chunk = jdk_internal_vm_Continuation::tail(continuation); 2219 return chunk != nullptr && chunk->preempted(); 2220 } 2221 2222 #if INCLUDE_CDS 2223 void java_lang_VirtualThread::serialize_offsets(SerializeClosure* f) { 2224 VTHREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2225 VTHREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 2226 } 2227 #endif 2228 2229 // java_lang_Throwable 2230 2231 int java_lang_Throwable::_backtrace_offset; 2232 int java_lang_Throwable::_detailMessage_offset; 2233 int java_lang_Throwable::_stackTrace_offset; 2234 int java_lang_Throwable::_depth_offset; 2235 int java_lang_Throwable::_cause_offset; 2236 int java_lang_Throwable::_static_unassigned_stacktrace_offset; 2237 2238 #define THROWABLE_FIELDS_DO(macro) \ 2239 macro(_backtrace_offset, k, "backtrace", object_signature, false); \ 2240 macro(_detailMessage_offset, k, "detailMessage", string_signature, false); \ 2241 macro(_stackTrace_offset, k, "stackTrace", java_lang_StackTraceElement_array, false); \ 2242 macro(_depth_offset, k, "depth", int_signature, false); \ 2243 macro(_cause_offset, k, "cause", throwable_signature, false); \ 2244 macro(_static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true) 2245 2246 void java_lang_Throwable::compute_offsets() { 2247 InstanceKlass* k = vmClasses::Throwable_klass(); 2248 THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 2249 } 2250 2251 #if INCLUDE_CDS 2252 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) { 2253 THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 2254 } 2255 #endif 2256 2257 oop java_lang_Throwable::unassigned_stacktrace() { 2258 InstanceKlass* ik = vmClasses::Throwable_klass(); 2259 oop base = ik->static_field_base_raw(); 2260 return base->obj_field(_static_unassigned_stacktrace_offset); 2261 } 2262 2263 oop java_lang_Throwable::backtrace(oop throwable) { 2264 return throwable->obj_field_acquire(_backtrace_offset); 2265 } 2266 2267 2268 void java_lang_Throwable::set_backtrace(oop throwable, oop value) { 2269 throwable->release_obj_field_put(_backtrace_offset, value); 2270 } 2271 2272 int java_lang_Throwable::depth(oop throwable) { 2273 return throwable->int_field(_depth_offset); 2274 } 2275 2276 void java_lang_Throwable::set_depth(oop throwable, int value) { 2277 throwable->int_field_put(_depth_offset, value); 2278 } 2279 2280 oop java_lang_Throwable::message(oop throwable) { 2281 return throwable->obj_field(_detailMessage_offset); 2282 } 2283 2284 const char* java_lang_Throwable::message_as_utf8(oop throwable) { 2285 oop msg = java_lang_Throwable::message(throwable); 2286 const char* msg_utf8 = nullptr; 2287 if (msg != nullptr) { 2288 msg_utf8 = java_lang_String::as_utf8_string(msg); 2289 } 2290 return msg_utf8; 2291 } 2292 2293 oop java_lang_Throwable::cause(oop throwable) { 2294 return throwable->obj_field(_cause_offset); 2295 } 2296 2297 void java_lang_Throwable::set_message(oop throwable, oop value) { 2298 throwable->obj_field_put(_detailMessage_offset, value); 2299 } 2300 2301 2302 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) { 2303 throwable->obj_field_put(_stackTrace_offset, st_element_array); 2304 } 2305 2306 void java_lang_Throwable::clear_stacktrace(oop throwable) { 2307 set_stacktrace(throwable, nullptr); 2308 } 2309 2310 2311 void java_lang_Throwable::print(oop throwable, outputStream* st) { 2312 ResourceMark rm; 2313 Klass* k = throwable->klass(); 2314 assert(k != nullptr, "just checking"); 2315 st->print("%s", k->external_name()); 2316 oop msg = message(throwable); 2317 if (msg != nullptr) { 2318 st->print(": %s", java_lang_String::as_utf8_string(msg)); 2319 } 2320 } 2321 2322 // After this many redefines, the stack trace is unreliable. 2323 const int MAX_VERSION = USHRT_MAX; 2324 2325 static inline bool version_matches(Method* method, int version) { 2326 assert(version < MAX_VERSION, "version is too big"); 2327 return method != nullptr && (method->constants()->version() == version); 2328 } 2329 2330 // This class provides a simple wrapper over the internal structure of 2331 // exception backtrace to insulate users of the backtrace from needing 2332 // to know what it looks like. 2333 // The code of this class is not GC safe. Allocations can only happen 2334 // in expand(). 2335 class BacktraceBuilder: public StackObj { 2336 friend class BacktraceIterator; 2337 private: 2338 Handle _backtrace; 2339 objArrayOop _head; 2340 typeArrayOop _methods; 2341 typeArrayOop _bcis; 2342 objArrayOop _mirrors; 2343 typeArrayOop _names; // Needed to insulate method name against redefinition. 2344 // True if the top frame of the backtrace is omitted because it shall be hidden. 2345 bool _has_hidden_top_frame; 2346 int _index; 2347 NoSafepointVerifier _nsv; 2348 2349 enum { 2350 trace_methods_offset = java_lang_Throwable::trace_methods_offset, 2351 trace_bcis_offset = java_lang_Throwable::trace_bcis_offset, 2352 trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset, 2353 trace_names_offset = java_lang_Throwable::trace_names_offset, 2354 trace_conts_offset = java_lang_Throwable::trace_conts_offset, 2355 trace_next_offset = java_lang_Throwable::trace_next_offset, 2356 trace_hidden_offset = java_lang_Throwable::trace_hidden_offset, 2357 trace_size = java_lang_Throwable::trace_size, 2358 trace_chunk_size = java_lang_Throwable::trace_chunk_size 2359 }; 2360 2361 // get info out of chunks 2362 static typeArrayOop get_methods(objArrayHandle chunk) { 2363 typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset)); 2364 assert(methods != nullptr, "method array should be initialized in backtrace"); 2365 return methods; 2366 } 2367 static typeArrayOop get_bcis(objArrayHandle chunk) { 2368 typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset)); 2369 assert(bcis != nullptr, "bci array should be initialized in backtrace"); 2370 return bcis; 2371 } 2372 static objArrayOop get_mirrors(objArrayHandle chunk) { 2373 objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset)); 2374 assert(mirrors != nullptr, "mirror array should be initialized in backtrace"); 2375 return mirrors; 2376 } 2377 static typeArrayOop get_names(objArrayHandle chunk) { 2378 typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset)); 2379 assert(names != nullptr, "names array should be initialized in backtrace"); 2380 return names; 2381 } 2382 static bool has_hidden_top_frame(objArrayHandle chunk) { 2383 oop hidden = chunk->obj_at(trace_hidden_offset); 2384 return hidden != nullptr; 2385 } 2386 2387 public: 2388 2389 // constructor for new backtrace 2390 BacktraceBuilder(TRAPS): _head(nullptr), _methods(nullptr), _bcis(nullptr), _mirrors(nullptr), _names(nullptr), _has_hidden_top_frame(false) { 2391 expand(CHECK); 2392 _backtrace = Handle(THREAD, _head); 2393 _index = 0; 2394 } 2395 2396 BacktraceBuilder(Thread* thread, objArrayHandle backtrace) { 2397 _methods = get_methods(backtrace); 2398 _bcis = get_bcis(backtrace); 2399 _mirrors = get_mirrors(backtrace); 2400 _names = get_names(backtrace); 2401 _has_hidden_top_frame = has_hidden_top_frame(backtrace); 2402 assert(_methods->length() == _bcis->length() && 2403 _methods->length() == _mirrors->length() && 2404 _mirrors->length() == _names->length(), 2405 "method and source information arrays should match"); 2406 2407 // head is the preallocated backtrace 2408 _head = backtrace(); 2409 _backtrace = Handle(thread, _head); 2410 _index = 0; 2411 } 2412 2413 void expand(TRAPS) { 2414 objArrayHandle old_head(THREAD, _head); 2415 PauseNoSafepointVerifier pnsv(&_nsv); 2416 2417 objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK); 2418 objArrayHandle new_head(THREAD, head); 2419 2420 typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK); 2421 typeArrayHandle new_methods(THREAD, methods); 2422 2423 typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK); 2424 typeArrayHandle new_bcis(THREAD, bcis); 2425 2426 objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK); 2427 objArrayHandle new_mirrors(THREAD, mirrors); 2428 2429 typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK); 2430 typeArrayHandle new_names(THREAD, names); 2431 2432 if (!old_head.is_null()) { 2433 old_head->obj_at_put(trace_next_offset, new_head()); 2434 } 2435 new_head->obj_at_put(trace_methods_offset, new_methods()); 2436 new_head->obj_at_put(trace_bcis_offset, new_bcis()); 2437 new_head->obj_at_put(trace_mirrors_offset, new_mirrors()); 2438 new_head->obj_at_put(trace_names_offset, new_names()); 2439 new_head->obj_at_put(trace_hidden_offset, nullptr); 2440 2441 _head = new_head(); 2442 _methods = new_methods(); 2443 _bcis = new_bcis(); 2444 _mirrors = new_mirrors(); 2445 _names = new_names(); 2446 _index = 0; 2447 } 2448 2449 oop backtrace() { 2450 return _backtrace(); 2451 } 2452 2453 inline void push(Method* method, int bci, TRAPS) { 2454 // Smear the -1 bci to 0 since the array only holds unsigned 2455 // shorts. The later line number lookup would just smear the -1 2456 // to a 0 even if it could be recorded. 2457 if (bci == SynchronizationEntryBCI) bci = 0; 2458 2459 if (_index >= trace_chunk_size) { 2460 methodHandle mhandle(THREAD, method); 2461 expand(CHECK); 2462 method = mhandle(); 2463 } 2464 2465 _methods->ushort_at_put(_index, method->orig_method_idnum()); 2466 _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version())); 2467 2468 // Note:this doesn't leak symbols because the mirror in the backtrace keeps the 2469 // klass owning the symbols alive so their refcounts aren't decremented. 2470 Symbol* name = method->name(); 2471 _names->symbol_at_put(_index, name); 2472 2473 // We need to save the mirrors in the backtrace to keep the class 2474 // from being unloaded while we still have this stack trace. 2475 assert(method->method_holder()->java_mirror() != nullptr, "never push null for mirror"); 2476 _mirrors->obj_at_put(_index, method->method_holder()->java_mirror()); 2477 2478 _index++; 2479 } 2480 2481 void set_has_hidden_top_frame() { 2482 if (!_has_hidden_top_frame) { 2483 // It would be nice to add java/lang/Boolean::TRUE here 2484 // to indicate that this backtrace has a hidden top frame. 2485 // But this code is used before TRUE is allocated. 2486 // Therefore let's just use an arbitrary legal oop 2487 // available right here. _methods is a short[]. 2488 assert(_methods != nullptr, "we need a legal oop"); 2489 _has_hidden_top_frame = true; 2490 _head->obj_at_put(trace_hidden_offset, _methods); 2491 } 2492 } 2493 }; 2494 2495 struct BacktraceElement : public StackObj { 2496 int _method_id; 2497 int _bci; 2498 int _version; 2499 Symbol* _name; 2500 Handle _mirror; 2501 BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) : 2502 _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {} 2503 }; 2504 2505 class BacktraceIterator : public StackObj { 2506 int _index; 2507 objArrayHandle _result; 2508 objArrayHandle _mirrors; 2509 typeArrayHandle _methods; 2510 typeArrayHandle _bcis; 2511 typeArrayHandle _names; 2512 2513 void init(objArrayHandle result, Thread* thread) { 2514 // Get method id, bci, version and mirror from chunk 2515 _result = result; 2516 if (_result.not_null()) { 2517 _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result)); 2518 _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result)); 2519 _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result)); 2520 _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result)); 2521 _index = 0; 2522 } 2523 } 2524 public: 2525 BacktraceIterator(objArrayHandle result, Thread* thread) { 2526 init(result, thread); 2527 assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match"); 2528 } 2529 2530 BacktraceElement next(Thread* thread) { 2531 BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)), 2532 _methods->ushort_at(_index), 2533 Backtrace::version_at(_bcis->int_at(_index)), 2534 Backtrace::bci_at(_bcis->int_at(_index)), 2535 _names->symbol_at(_index)); 2536 _index++; 2537 2538 if (_index >= java_lang_Throwable::trace_chunk_size) { 2539 int next_offset = java_lang_Throwable::trace_next_offset; 2540 // Get next chunk 2541 objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset))); 2542 init(result, thread); 2543 } 2544 return e; 2545 } 2546 2547 bool repeat() { 2548 return _result.not_null() && _mirrors->obj_at(_index) != nullptr; 2549 } 2550 }; 2551 2552 2553 // Print stack trace element to resource allocated buffer 2554 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id, 2555 int version, int bci, Symbol* name) { 2556 ResourceMark rm; 2557 2558 // Get strings and string lengths 2559 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror())); 2560 const char* klass_name = holder->external_name(); 2561 int buf_len = (int)strlen(klass_name); 2562 2563 char* method_name = name->as_C_string(); 2564 buf_len += (int)strlen(method_name); 2565 2566 char* source_file_name = nullptr; 2567 Symbol* source = Backtrace::get_source_file_name(holder, version); 2568 if (source != nullptr) { 2569 source_file_name = source->as_C_string(); 2570 buf_len += (int)strlen(source_file_name); 2571 } 2572 2573 char *module_name = nullptr, *module_version = nullptr; 2574 ModuleEntry* module = holder->module(); 2575 if (module->is_named()) { 2576 module_name = module->name()->as_C_string(); 2577 buf_len += (int)strlen(module_name); 2578 if (module->version() != nullptr) { 2579 module_version = module->version()->as_C_string(); 2580 buf_len += (int)strlen(module_version); 2581 } 2582 } 2583 2584 // Allocate temporary buffer with extra space for formatting and line number 2585 const size_t buf_size = buf_len + 64; 2586 char* buf = NEW_RESOURCE_ARRAY(char, buf_size); 2587 2588 // Print stack trace line in buffer 2589 size_t buf_off = os::snprintf_checked(buf, buf_size, "\tat %s.%s(", klass_name, method_name); 2590 2591 // Print module information 2592 if (module_name != nullptr) { 2593 if (module_version != nullptr) { 2594 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s@%s/", module_name, module_version); 2595 } else { 2596 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s/", module_name); 2597 } 2598 } 2599 2600 // The method can be null if the requested class version is gone 2601 Method* method = holder->method_with_orig_idnum(method_id, version); 2602 if (!version_matches(method, version)) { 2603 strcat(buf, "Redefined)"); 2604 } else { 2605 int line_number = Backtrace::get_line_number(method, bci); 2606 if (line_number == -2) { 2607 strcat(buf, "Native Method)"); 2608 } else { 2609 if (source_file_name != nullptr && (line_number != -1)) { 2610 // Sourcename and linenumber 2611 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s:%d)", source_file_name, line_number); 2612 } else if (source_file_name != nullptr) { 2613 // Just sourcename 2614 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s)", source_file_name); 2615 } else { 2616 // Neither sourcename nor linenumber 2617 buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "Unknown Source)"); 2618 } 2619 nmethod* nm = method->code(); 2620 if (WizardMode && nm != nullptr) { 2621 os::snprintf_checked(buf + buf_off, buf_size - buf_off, "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm); 2622 } 2623 } 2624 } 2625 2626 st->print_cr("%s", buf); 2627 } 2628 2629 void java_lang_Throwable::print_stack_element(outputStream *st, Method* method, int bci) { 2630 Handle mirror (Thread::current(), method->method_holder()->java_mirror()); 2631 int method_id = method->orig_method_idnum(); 2632 int version = method->constants()->version(); 2633 print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name()); 2634 } 2635 2636 /** 2637 * Print the throwable message and its stack trace plus all causes by walking the 2638 * cause chain. The output looks the same as of Throwable.printStackTrace(). 2639 */ 2640 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) { 2641 // First, print the message. 2642 print(throwable(), st); 2643 st->cr(); 2644 2645 // Now print the stack trace. 2646 JavaThread* THREAD = JavaThread::current(); // For exception macros. 2647 while (throwable.not_null()) { 2648 objArrayHandle result (THREAD, objArrayOop(backtrace(throwable()))); 2649 if (result.is_null()) { 2650 st->print_raw_cr("\t<<no stack trace available>>"); 2651 return; 2652 } 2653 BacktraceIterator iter(result, THREAD); 2654 2655 while (iter.repeat()) { 2656 BacktraceElement bte = iter.next(THREAD); 2657 print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name); 2658 } 2659 if (THREAD->can_call_java()) { 2660 // Call getCause() which doesn't necessarily return the _cause field. 2661 ExceptionMark em(THREAD); 2662 JavaValue cause(T_OBJECT); 2663 JavaCalls::call_virtual(&cause, 2664 throwable, 2665 throwable->klass(), 2666 vmSymbols::getCause_name(), 2667 vmSymbols::void_throwable_signature(), 2668 THREAD); 2669 // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM. 2670 if (HAS_PENDING_EXCEPTION) { 2671 CLEAR_PENDING_EXCEPTION; 2672 throwable = Handle(); 2673 } else { 2674 throwable = Handle(THREAD, cause.get_oop()); 2675 if (throwable.not_null()) { 2676 st->print("Caused by: "); 2677 print(throwable(), st); 2678 st->cr(); 2679 } 2680 } 2681 } else { 2682 st->print_raw_cr("<<cannot call Java to get cause>>"); 2683 return; 2684 } 2685 } 2686 } 2687 2688 /** 2689 * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace(). 2690 */ 2691 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) { 2692 assert(throwable->is_a(vmClasses::Throwable_klass()), "Throwable instance expected"); 2693 JavaValue result(T_VOID); 2694 JavaCalls::call_virtual(&result, 2695 throwable, 2696 vmClasses::Throwable_klass(), 2697 vmSymbols::printStackTrace_name(), 2698 vmSymbols::void_method_signature(), 2699 THREAD); 2700 } 2701 2702 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) { 2703 if (!StackTraceInThrowable) return; 2704 ResourceMark rm(THREAD); 2705 2706 // Start out by clearing the backtrace for this object, in case the VM 2707 // runs out of memory while allocating the stack trace 2708 set_backtrace(throwable(), nullptr); 2709 // Clear lazily constructed Java level stacktrace if refilling occurs 2710 // This is unnecessary in 1.7+ but harmless 2711 clear_stacktrace(throwable()); 2712 2713 int max_depth = MaxJavaStackTraceDepth; 2714 JavaThread* thread = THREAD; 2715 2716 BacktraceBuilder bt(CHECK); 2717 2718 // If there is no Java frame just return the method that was being called 2719 // with bci 0 2720 if (!thread->has_last_Java_frame()) { 2721 if (max_depth >= 1 && method() != nullptr) { 2722 bt.push(method(), 0, CHECK); 2723 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1); 2724 set_depth(throwable(), 1); 2725 set_backtrace(throwable(), bt.backtrace()); 2726 } 2727 return; 2728 } 2729 2730 // Instead of using vframe directly, this version of fill_in_stack_trace 2731 // basically handles everything by hand. This significantly improved the 2732 // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows. 2733 // See bug 6333838 for more details. 2734 // The "ASSERT" here is to verify this method generates the exactly same stack 2735 // trace as utilizing vframe. 2736 #ifdef ASSERT 2737 vframeStream st(thread, false /* stop_at_java_call_stub */, false /* process_frames */); 2738 #endif 2739 int total_count = 0; 2740 RegisterMap map(thread, 2741 RegisterMap::UpdateMap::skip, 2742 RegisterMap::ProcessFrames::skip, 2743 RegisterMap::WalkContinuation::include); 2744 int decode_offset = 0; 2745 nmethod* nm = nullptr; 2746 bool skip_fillInStackTrace_check = false; 2747 bool skip_throwableInit_check = false; 2748 bool skip_hidden = !ShowHiddenFrames; 2749 bool show_carrier = ShowCarrierFrames; 2750 ContinuationEntry* cont_entry = thread->last_continuation(); 2751 for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) { 2752 Method* method = nullptr; 2753 int bci = 0; 2754 2755 // Compiled java method case. 2756 if (decode_offset != 0) { 2757 DebugInfoReadStream stream(nm, decode_offset); 2758 decode_offset = stream.read_int(); 2759 method = (Method*)nm->metadata_at(stream.read_int()); 2760 bci = stream.read_bci(); 2761 } else { 2762 if (fr.is_first_frame()) break; 2763 2764 if (Continuation::is_continuation_enterSpecial(fr)) { 2765 assert(cont_entry == Continuation::get_continuation_entry_for_entry_frame(thread, fr), ""); 2766 if (!show_carrier && cont_entry->is_virtual_thread()) { 2767 break; 2768 } 2769 cont_entry = cont_entry->parent(); 2770 } 2771 2772 address pc = fr.pc(); 2773 if (fr.is_interpreted_frame()) { 2774 address bcp; 2775 if (!map.in_cont()) { 2776 bcp = fr.interpreter_frame_bcp(); 2777 method = fr.interpreter_frame_method(); 2778 } else { 2779 bcp = map.stack_chunk()->interpreter_frame_bcp(fr); 2780 method = map.stack_chunk()->interpreter_frame_method(fr); 2781 } 2782 bci = method->bci_from(bcp); 2783 fr = fr.sender(&map); 2784 } else { 2785 CodeBlob* cb = fr.cb(); 2786 // HMMM QQQ might be nice to have frame return nm as null if cb is non-null 2787 // but non nmethod 2788 fr = fr.sender(&map); 2789 if (cb == nullptr || !cb->is_nmethod()) { 2790 continue; 2791 } 2792 nm = cb->as_nmethod(); 2793 assert(nm->method() != nullptr, "must be"); 2794 if (nm->method()->is_native()) { 2795 method = nm->method(); 2796 bci = 0; 2797 } else { 2798 PcDesc* pd = nm->pc_desc_at(pc); 2799 decode_offset = pd->scope_decode_offset(); 2800 // if decode_offset is not equal to 0, it will execute the 2801 // "compiled java method case" at the beginning of the loop. 2802 continue; 2803 } 2804 } 2805 } 2806 #ifdef ASSERT 2807 if (!st.at_end()) { // TODO LOOM remove once we show only vthread trace 2808 assert(st.method() == method && st.bci() == bci, "Wrong stack trace"); 2809 st.next(); 2810 } 2811 #endif 2812 2813 // the format of the stacktrace will be: 2814 // - 1 or more fillInStackTrace frames for the exception class (skipped) 2815 // - 0 or more <init> methods for the exception class (skipped) 2816 // - rest of the stack 2817 2818 if (!skip_fillInStackTrace_check) { 2819 if (method->name() == vmSymbols::fillInStackTrace_name() && 2820 throwable->is_a(method->method_holder())) { 2821 continue; 2822 } 2823 else { 2824 skip_fillInStackTrace_check = true; // gone past them all 2825 } 2826 } 2827 if (!skip_throwableInit_check) { 2828 assert(skip_fillInStackTrace_check, "logic error in backtrace filtering"); 2829 2830 // skip <init> methods of the exception class and superclasses 2831 // This is similar to classic VM. 2832 if (method->is_object_constructor() && 2833 throwable->is_a(method->method_holder())) { 2834 continue; 2835 } else { 2836 // there are none or we've seen them all - either way stop checking 2837 skip_throwableInit_check = true; 2838 } 2839 } 2840 if (method->is_hidden() || method->is_continuation_enter_intrinsic()) { 2841 if (skip_hidden) { 2842 if (total_count == 0) { 2843 // The top frame will be hidden from the stack trace. 2844 bt.set_has_hidden_top_frame(); 2845 } 2846 continue; 2847 } 2848 } 2849 2850 bt.push(method, bci, CHECK); 2851 total_count++; 2852 } 2853 2854 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count); 2855 2856 // Put completed stack trace into throwable object 2857 set_backtrace(throwable(), bt.backtrace()); 2858 set_depth(throwable(), total_count); 2859 } 2860 2861 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) { 2862 // No-op if stack trace is disabled 2863 if (!StackTraceInThrowable) { 2864 return; 2865 } 2866 2867 // Disable stack traces for some preallocated out of memory errors 2868 if (!Universe::should_fill_in_stack_trace(throwable)) { 2869 return; 2870 } 2871 2872 JavaThread* THREAD = JavaThread::current(); // For exception macros. 2873 PreserveExceptionMark pm(THREAD); 2874 2875 fill_in_stack_trace(throwable, method, THREAD); 2876 // Ignore exceptions thrown during stack trace filling (OOM) and reinstall the 2877 // original exception via the PreserveExceptionMark destructor. 2878 CLEAR_PENDING_EXCEPTION; 2879 } 2880 2881 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) { 2882 // Allocate stack trace - backtrace is created but not filled in 2883 2884 // No-op if stack trace is disabled 2885 if (!StackTraceInThrowable) return; 2886 BacktraceBuilder bt(CHECK); // creates a backtrace 2887 set_backtrace(throwable(), bt.backtrace()); 2888 } 2889 2890 2891 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) { 2892 // Fill in stack trace into preallocated backtrace (no GC) 2893 2894 // No-op if stack trace is disabled 2895 if (!StackTraceInThrowable) return; 2896 2897 assert(throwable->is_a(vmClasses::Throwable_klass()), "sanity check"); 2898 2899 JavaThread* THREAD = JavaThread::current(); // For exception macros. 2900 2901 objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable())); 2902 assert(backtrace.not_null(), "backtrace should have been preallocated"); 2903 2904 ResourceMark rm(THREAD); 2905 vframeStream st(THREAD, false /* stop_at_java_call_stub */, false /* process_frames */); 2906 2907 BacktraceBuilder bt(THREAD, backtrace); 2908 2909 // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init 2910 // methods as preallocated errors aren't created by "java" code. 2911 2912 // fill in as much stack trace as possible 2913 int chunk_count = 0; 2914 for (;!st.at_end(); st.next()) { 2915 bt.push(st.method(), st.bci(), CHECK); 2916 chunk_count++; 2917 2918 // Bail-out for deep stacks 2919 if (chunk_count >= trace_chunk_size) break; 2920 } 2921 set_depth(throwable(), chunk_count); 2922 log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count); 2923 2924 // We support the Throwable immutability protocol defined for Java 7. 2925 java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace()); 2926 assert(java_lang_Throwable::unassigned_stacktrace() != nullptr, "not initialized"); 2927 } 2928 2929 void java_lang_Throwable::get_stack_trace_elements(int depth, Handle backtrace, 2930 objArrayHandle stack_trace_array_h, TRAPS) { 2931 2932 if (backtrace.is_null() || stack_trace_array_h.is_null()) { 2933 THROW(vmSymbols::java_lang_NullPointerException()); 2934 } 2935 2936 assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent"); 2937 2938 if (stack_trace_array_h->length() != depth) { 2939 THROW(vmSymbols::java_lang_IndexOutOfBoundsException()); 2940 } 2941 2942 objArrayHandle result(THREAD, objArrayOop(backtrace())); 2943 BacktraceIterator iter(result, THREAD); 2944 2945 int index = 0; 2946 while (iter.repeat()) { 2947 BacktraceElement bte = iter.next(THREAD); 2948 2949 Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++)); 2950 2951 if (stack_trace_element.is_null()) { 2952 THROW(vmSymbols::java_lang_NullPointerException()); 2953 } 2954 2955 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror())); 2956 methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version)); 2957 2958 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, 2959 method, 2960 bte._version, 2961 bte._bci, 2962 bte._name, 2963 CHECK); 2964 } 2965 } 2966 2967 Handle java_lang_Throwable::create_initialization_error(JavaThread* current, Handle throwable) { 2968 // Creates an ExceptionInInitializerError to be recorded as the initialization error when class initialization 2969 // failed due to the passed in 'throwable'. We cannot save 'throwable' directly due to issues with keeping alive 2970 // all objects referenced via its stacktrace. So instead we save a new EIIE instance, with the same message and 2971 // symbolic stacktrace of 'throwable'. 2972 assert(throwable.not_null(), "shouldn't be"); 2973 2974 // Now create the message from the original exception and thread name. 2975 ResourceMark rm(current); 2976 const char *message = nullptr; 2977 oop detailed_message = java_lang_Throwable::message(throwable()); 2978 if (detailed_message != nullptr) { 2979 message = java_lang_String::as_utf8_string(detailed_message); 2980 } 2981 stringStream st; 2982 st.print("Exception %s%s ", throwable()->klass()->name()->as_klass_external_name(), 2983 message == nullptr ? "" : ":"); 2984 if (message == nullptr) { 2985 st.print("[in thread \"%s\"]", current->name()); 2986 } else { 2987 st.print("%s [in thread \"%s\"]", message, current->name()); 2988 } 2989 2990 Symbol* exception_name = vmSymbols::java_lang_ExceptionInInitializerError(); 2991 Handle init_error = Exceptions::new_exception(current, exception_name, st.as_string()); 2992 // If new_exception returns a different exception while creating the exception, 2993 // abandon the attempt to save the initialization error and return null. 2994 if (init_error->klass()->name() != exception_name) { 2995 log_info(class, init)("Exception %s thrown while saving initialization exception", 2996 init_error->klass()->external_name()); 2997 return Handle(); 2998 } 2999 3000 // Call to java to fill in the stack trace and clear declaringClassObject to 3001 // not keep classes alive in the stack trace. 3002 // call this: public StackTraceElement[] getStackTrace() 3003 JavaValue result(T_ARRAY); 3004 JavaCalls::call_virtual(&result, throwable, 3005 vmClasses::Throwable_klass(), 3006 vmSymbols::getStackTrace_name(), 3007 vmSymbols::getStackTrace_signature(), 3008 current); 3009 if (!current->has_pending_exception()){ 3010 Handle stack_trace(current, result.get_oop()); 3011 assert(stack_trace->is_objArray(), "Should be an array"); 3012 java_lang_Throwable::set_stacktrace(init_error(), stack_trace()); 3013 // Clear backtrace because the stacktrace should be used instead. 3014 set_backtrace(init_error(), nullptr); 3015 } else { 3016 log_info(class, init)("Exception thrown while getting stack trace for initialization exception %s", 3017 init_error->klass()->external_name()); 3018 current->clear_pending_exception(); 3019 } 3020 3021 return init_error; 3022 } 3023 3024 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) { 3025 JavaThread* current = JavaThread::current(); 3026 objArrayHandle result(current, objArrayOop(backtrace(throwable))); 3027 BacktraceIterator iter(result, current); 3028 // No backtrace available. 3029 if (!iter.repeat()) return false; 3030 3031 // If the exception happened in a frame that has been hidden, i.e., 3032 // omitted from the back trace, we can not compute the message. 3033 oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset); 3034 if (hidden != nullptr) { 3035 return false; 3036 } 3037 3038 // Get first backtrace element. 3039 BacktraceElement bte = iter.next(current); 3040 3041 InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror())); 3042 assert(holder != nullptr, "first element should be non-null"); 3043 Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version); 3044 3045 // Original version is no longer available. 3046 if (m == nullptr || !version_matches(m, bte._version)) { 3047 return false; 3048 } 3049 3050 *method = m; 3051 *bci = bte._bci; 3052 return true; 3053 } 3054 3055 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) { 3056 // Allocate java.lang.StackTraceElement instance 3057 InstanceKlass* k = vmClasses::StackTraceElement_klass(); 3058 assert(k != nullptr, "must be loaded in 1.4+"); 3059 if (k->should_be_initialized()) { 3060 k->initialize(CHECK_NULL); 3061 } 3062 3063 Handle element = k->allocate_instance_handle(CHECK_NULL); 3064 3065 int version = method->constants()->version(); 3066 fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_NULL); 3067 return element(); 3068 } 3069 3070 void java_lang_StackTraceElement::fill_in(Handle element, 3071 InstanceKlass* holder, const methodHandle& method, 3072 int version, int bci, Symbol* name, TRAPS) { 3073 assert(element->is_a(vmClasses::StackTraceElement_klass()), "sanity check"); 3074 3075 ResourceMark rm(THREAD); 3076 HandleMark hm(THREAD); 3077 3078 // Fill in class name 3079 Handle java_class(THREAD, holder->java_mirror()); 3080 oop classname = java_lang_Class::name(java_class, CHECK); 3081 java_lang_StackTraceElement::set_declaringClass(element(), classname); 3082 java_lang_StackTraceElement::set_declaringClassObject(element(), java_class()); 3083 3084 oop loader = holder->class_loader(); 3085 if (loader != nullptr) { 3086 oop loader_name = java_lang_ClassLoader::name(loader); 3087 if (loader_name != nullptr) 3088 java_lang_StackTraceElement::set_classLoaderName(element(), loader_name); 3089 } 3090 3091 // Fill in method name 3092 oop methodname = StringTable::intern(name, CHECK); 3093 java_lang_StackTraceElement::set_methodName(element(), methodname); 3094 3095 // Fill in module name and version 3096 ModuleEntry* module = holder->module(); 3097 if (module->is_named()) { 3098 oop module_name = StringTable::intern(module->name(), CHECK); 3099 java_lang_StackTraceElement::set_moduleName(element(), module_name); 3100 oop module_version; 3101 if (module->version() != nullptr) { 3102 module_version = StringTable::intern(module->version(), CHECK); 3103 } else { 3104 module_version = nullptr; 3105 } 3106 java_lang_StackTraceElement::set_moduleVersion(element(), module_version); 3107 } 3108 3109 if (method() == nullptr || !version_matches(method(), version)) { 3110 // The method was redefined, accurate line number information isn't available 3111 java_lang_StackTraceElement::set_fileName(element(), nullptr); 3112 java_lang_StackTraceElement::set_lineNumber(element(), -1); 3113 } else { 3114 Symbol* source; 3115 oop source_file; 3116 int line_number; 3117 decode_file_and_line(java_class, holder, version, method, bci, source, source_file, line_number, CHECK); 3118 3119 java_lang_StackTraceElement::set_fileName(element(), source_file); 3120 java_lang_StackTraceElement::set_lineNumber(element(), line_number); 3121 } 3122 } 3123 3124 void java_lang_StackTraceElement::decode_file_and_line(Handle java_class, 3125 InstanceKlass* holder, 3126 int version, 3127 const methodHandle& method, 3128 int bci, 3129 Symbol*& source, 3130 oop& source_file, 3131 int& line_number, TRAPS) { 3132 // Fill in source file name and line number. 3133 source = Backtrace::get_source_file_name(holder, version); 3134 source_file = java_lang_Class::source_file(java_class()); 3135 if (source != nullptr) { 3136 // Class was not redefined. We can trust its cache if set, 3137 // else we have to initialize it. 3138 if (source_file == nullptr) { 3139 source_file = StringTable::intern(source, CHECK); 3140 java_lang_Class::set_source_file(java_class(), source_file); 3141 } 3142 } else { 3143 // Class was redefined. Dump the cache if it was set. 3144 if (source_file != nullptr) { 3145 source_file = nullptr; 3146 java_lang_Class::set_source_file(java_class(), source_file); 3147 } 3148 } 3149 line_number = Backtrace::get_line_number(method(), bci); 3150 } 3151 3152 #if INCLUDE_JVMCI 3153 void java_lang_StackTraceElement::decode(const methodHandle& method, int bci, 3154 Symbol*& filename, int& line_number, TRAPS) { 3155 ResourceMark rm(THREAD); 3156 HandleMark hm(THREAD); 3157 3158 filename = nullptr; 3159 line_number = -1; 3160 3161 oop source_file; 3162 int version = method->constants()->version(); 3163 InstanceKlass* holder = method->method_holder(); 3164 Handle java_class(THREAD, holder->java_mirror()); 3165 decode_file_and_line(java_class, holder, version, method, bci, filename, source_file, line_number, CHECK); 3166 } 3167 #endif // INCLUDE_JVMCI 3168 3169 // java_lang_ClassFrameInfo 3170 3171 int java_lang_ClassFrameInfo::_classOrMemberName_offset; 3172 int java_lang_ClassFrameInfo::_flags_offset; 3173 3174 #define CLASSFRAMEINFO_FIELDS_DO(macro) \ 3175 macro(_classOrMemberName_offset, k, "classOrMemberName", object_signature, false); \ 3176 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false) 3177 3178 void java_lang_ClassFrameInfo::compute_offsets() { 3179 InstanceKlass* k = vmClasses::ClassFrameInfo_klass(); 3180 CLASSFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3181 } 3182 3183 #if INCLUDE_CDS 3184 void java_lang_ClassFrameInfo::serialize_offsets(SerializeClosure* f) { 3185 CLASSFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3186 } 3187 #endif 3188 3189 static int get_flags(const methodHandle& m) { 3190 int flags = m->access_flags().as_method_flags(); 3191 if (m->is_object_constructor()) { 3192 flags |= java_lang_invoke_MemberName::MN_IS_OBJECT_CONSTRUCTOR; 3193 } else { 3194 // Note: Static initializers can be here. Record them as plain methods. 3195 flags |= java_lang_invoke_MemberName::MN_IS_METHOD; 3196 } 3197 if (m->caller_sensitive()) { 3198 flags |= java_lang_invoke_MemberName::MN_CALLER_SENSITIVE; 3199 } 3200 if (m->is_hidden()) { 3201 flags |= java_lang_invoke_MemberName::MN_HIDDEN_MEMBER; 3202 } 3203 assert((flags & 0xFF000000) == 0, "unexpected flags"); 3204 return flags; 3205 } 3206 3207 oop java_lang_ClassFrameInfo::classOrMemberName(oop obj) { 3208 return obj->obj_field(_classOrMemberName_offset); 3209 } 3210 3211 int java_lang_ClassFrameInfo::flags(oop obj) { 3212 return obj->int_field(_flags_offset); 3213 } 3214 3215 void java_lang_ClassFrameInfo::init_class(Handle stackFrame, const methodHandle& m) { 3216 stackFrame->obj_field_put(_classOrMemberName_offset, m->method_holder()->java_mirror()); 3217 // flags is initialized when ClassFrameInfo object is constructed and retain the value 3218 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m); 3219 stackFrame->int_field_put(_flags_offset, flags); 3220 } 3221 3222 void java_lang_ClassFrameInfo::init_method(Handle stackFrame, const methodHandle& m, TRAPS) { 3223 oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(m, CHECK); 3224 stackFrame->obj_field_put(_classOrMemberName_offset, rmethod_name); 3225 // flags is initialized when ClassFrameInfo object is constructed and retain the value 3226 int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m); 3227 stackFrame->int_field_put(_flags_offset, flags); 3228 } 3229 3230 3231 // java_lang_StackFrameInfo 3232 3233 int java_lang_StackFrameInfo::_type_offset; 3234 int java_lang_StackFrameInfo::_name_offset; 3235 int java_lang_StackFrameInfo::_bci_offset; 3236 int java_lang_StackFrameInfo::_version_offset; 3237 int java_lang_StackFrameInfo::_contScope_offset; 3238 3239 #define STACKFRAMEINFO_FIELDS_DO(macro) \ 3240 macro(_type_offset, k, "type", object_signature, false); \ 3241 macro(_name_offset, k, "name", string_signature, false); \ 3242 macro(_bci_offset, k, "bci", int_signature, false); \ 3243 macro(_contScope_offset, k, "contScope", continuationscope_signature, false) 3244 3245 void java_lang_StackFrameInfo::compute_offsets() { 3246 InstanceKlass* k = vmClasses::StackFrameInfo_klass(); 3247 STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3248 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3249 } 3250 3251 #if INCLUDE_CDS 3252 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) { 3253 STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3254 STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3255 } 3256 #endif 3257 3258 Method* java_lang_StackFrameInfo::get_method(oop obj) { 3259 oop m = java_lang_ClassFrameInfo::classOrMemberName(obj); 3260 Method* method = java_lang_invoke_ResolvedMethodName::vmtarget(m); 3261 return method; 3262 } 3263 3264 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS) { 3265 // set Method* or mid/cpref 3266 HandleMark hm(THREAD); 3267 Handle cont_h(THREAD, cont); 3268 java_lang_ClassFrameInfo::init_method(stackFrame, method, CHECK); 3269 3270 // set bci 3271 java_lang_StackFrameInfo::set_bci(stackFrame(), bci); 3272 // method may be redefined; store the version 3273 int version = method->constants()->version(); 3274 assert((jushort)version == version, "version should be short"); 3275 java_lang_StackFrameInfo::set_version(stackFrame(), (short)version); 3276 3277 oop contScope = cont_h() != nullptr ? jdk_internal_vm_Continuation::scope(cont_h()) : (oop)nullptr; 3278 java_lang_StackFrameInfo::set_contScope(stackFrame(), contScope); 3279 } 3280 3281 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) { 3282 ResourceMark rm(THREAD); 3283 HandleMark hm(THREAD); 3284 3285 Method* method = java_lang_StackFrameInfo::get_method(stackFrame()); 3286 InstanceKlass* holder = method->method_holder(); 3287 short version = stackFrame->short_field(_version_offset); 3288 int bci = stackFrame->int_field(_bci_offset); 3289 Symbol* name = method->name(); 3290 java_lang_StackTraceElement::fill_in(stack_trace_element, holder, methodHandle(THREAD, method), version, bci, name, CHECK); 3291 } 3292 3293 oop java_lang_StackFrameInfo::type(oop obj) { 3294 return obj->obj_field(_type_offset); 3295 } 3296 3297 void java_lang_StackFrameInfo::set_type(oop obj, oop value) { 3298 obj->obj_field_put(_type_offset, value); 3299 } 3300 3301 oop java_lang_StackFrameInfo::name(oop obj) { 3302 return obj->obj_field(_name_offset); 3303 } 3304 3305 void java_lang_StackFrameInfo::set_name(oop obj, oop value) { 3306 obj->obj_field_put(_name_offset, value); 3307 } 3308 3309 void java_lang_StackFrameInfo::set_version(oop obj, short value) { 3310 obj->short_field_put(_version_offset, value); 3311 } 3312 3313 void java_lang_StackFrameInfo::set_bci(oop obj, int value) { 3314 assert(value >= 0 && value < max_jushort, "must be a valid bci value"); 3315 obj->int_field_put(_bci_offset, value); 3316 } 3317 3318 void java_lang_StackFrameInfo::set_contScope(oop obj, oop value) { 3319 obj->obj_field_put(_contScope_offset, value); 3320 } 3321 3322 int java_lang_LiveStackFrameInfo::_monitors_offset; 3323 int java_lang_LiveStackFrameInfo::_locals_offset; 3324 int java_lang_LiveStackFrameInfo::_operands_offset; 3325 int java_lang_LiveStackFrameInfo::_mode_offset; 3326 3327 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \ 3328 macro(_monitors_offset, k, "monitors", object_array_signature, false); \ 3329 macro(_locals_offset, k, "locals", object_array_signature, false); \ 3330 macro(_operands_offset, k, "operands", object_array_signature, false); \ 3331 macro(_mode_offset, k, "mode", int_signature, false) 3332 3333 void java_lang_LiveStackFrameInfo::compute_offsets() { 3334 InstanceKlass* k = vmClasses::LiveStackFrameInfo_klass(); 3335 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3336 } 3337 3338 #if INCLUDE_CDS 3339 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) { 3340 LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3341 } 3342 #endif 3343 3344 void java_lang_LiveStackFrameInfo::set_monitors(oop obj, oop value) { 3345 obj->obj_field_put(_monitors_offset, value); 3346 } 3347 3348 void java_lang_LiveStackFrameInfo::set_locals(oop obj, oop value) { 3349 obj->obj_field_put(_locals_offset, value); 3350 } 3351 3352 void java_lang_LiveStackFrameInfo::set_operands(oop obj, oop value) { 3353 obj->obj_field_put(_operands_offset, value); 3354 } 3355 3356 void java_lang_LiveStackFrameInfo::set_mode(oop obj, int value) { 3357 obj->int_field_put(_mode_offset, value); 3358 } 3359 3360 3361 // java_lang_AccessibleObject 3362 3363 int java_lang_reflect_AccessibleObject::_override_offset; 3364 3365 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \ 3366 macro(_override_offset, k, "override", bool_signature, false) 3367 3368 void java_lang_reflect_AccessibleObject::compute_offsets() { 3369 InstanceKlass* k = vmClasses::reflect_AccessibleObject_klass(); 3370 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3371 } 3372 3373 #if INCLUDE_CDS 3374 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) { 3375 ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3376 } 3377 #endif 3378 3379 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) { 3380 return (jboolean) reflect->bool_field(_override_offset); 3381 } 3382 3383 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) { 3384 reflect->bool_field_put(_override_offset, (int) value); 3385 } 3386 3387 // java_lang_reflect_Method 3388 3389 int java_lang_reflect_Method::_clazz_offset; 3390 int java_lang_reflect_Method::_name_offset; 3391 int java_lang_reflect_Method::_returnType_offset; 3392 int java_lang_reflect_Method::_parameterTypes_offset; 3393 int java_lang_reflect_Method::_exceptionTypes_offset; 3394 int java_lang_reflect_Method::_slot_offset; 3395 int java_lang_reflect_Method::_modifiers_offset; 3396 int java_lang_reflect_Method::_signature_offset; 3397 int java_lang_reflect_Method::_annotations_offset; 3398 int java_lang_reflect_Method::_parameter_annotations_offset; 3399 int java_lang_reflect_Method::_annotation_default_offset; 3400 3401 #define METHOD_FIELDS_DO(macro) \ 3402 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3403 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3404 macro(_returnType_offset, k, vmSymbols::returnType_name(), class_signature, false); \ 3405 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 3406 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 3407 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 3408 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3409 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 3410 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \ 3411 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \ 3412 macro(_annotation_default_offset, k, vmSymbols::annotation_default_name(), byte_array_signature, false); 3413 3414 void java_lang_reflect_Method::compute_offsets() { 3415 InstanceKlass* k = vmClasses::reflect_Method_klass(); 3416 METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3417 } 3418 3419 #if INCLUDE_CDS 3420 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) { 3421 METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3422 } 3423 #endif 3424 3425 Handle java_lang_reflect_Method::create(TRAPS) { 3426 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3427 Klass* klass = vmClasses::reflect_Method_klass(); 3428 // This class is eagerly initialized during VM initialization, since we keep a reference 3429 // to one of the methods 3430 assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized"); 3431 return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD); 3432 } 3433 3434 oop java_lang_reflect_Method::clazz(oop reflect) { 3435 return reflect->obj_field(_clazz_offset); 3436 } 3437 3438 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) { 3439 reflect->obj_field_put(_clazz_offset, value); 3440 } 3441 3442 int java_lang_reflect_Method::slot(oop reflect) { 3443 return reflect->int_field(_slot_offset); 3444 } 3445 3446 void java_lang_reflect_Method::set_slot(oop reflect, int value) { 3447 reflect->int_field_put(_slot_offset, value); 3448 } 3449 3450 void java_lang_reflect_Method::set_name(oop method, oop value) { 3451 method->obj_field_put(_name_offset, value); 3452 } 3453 3454 oop java_lang_reflect_Method::return_type(oop method) { 3455 return method->obj_field(_returnType_offset); 3456 } 3457 3458 void java_lang_reflect_Method::set_return_type(oop method, oop value) { 3459 method->obj_field_put(_returnType_offset, value); 3460 } 3461 3462 oop java_lang_reflect_Method::parameter_types(oop method) { 3463 return method->obj_field(_parameterTypes_offset); 3464 } 3465 3466 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) { 3467 method->obj_field_put(_parameterTypes_offset, value); 3468 } 3469 3470 void java_lang_reflect_Method::set_exception_types(oop method, oop value) { 3471 method->obj_field_put(_exceptionTypes_offset, value); 3472 } 3473 3474 void java_lang_reflect_Method::set_modifiers(oop method, int value) { 3475 method->int_field_put(_modifiers_offset, value); 3476 } 3477 3478 void java_lang_reflect_Method::set_signature(oop method, oop value) { 3479 method->obj_field_put(_signature_offset, value); 3480 } 3481 3482 void java_lang_reflect_Method::set_annotations(oop method, oop value) { 3483 method->obj_field_put(_annotations_offset, value); 3484 } 3485 3486 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) { 3487 method->obj_field_put(_parameter_annotations_offset, value); 3488 } 3489 3490 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) { 3491 method->obj_field_put(_annotation_default_offset, value); 3492 } 3493 3494 int java_lang_reflect_Constructor::_clazz_offset; 3495 int java_lang_reflect_Constructor::_parameterTypes_offset; 3496 int java_lang_reflect_Constructor::_exceptionTypes_offset; 3497 int java_lang_reflect_Constructor::_slot_offset; 3498 int java_lang_reflect_Constructor::_modifiers_offset; 3499 int java_lang_reflect_Constructor::_signature_offset; 3500 int java_lang_reflect_Constructor::_annotations_offset; 3501 int java_lang_reflect_Constructor::_parameter_annotations_offset; 3502 3503 #define CONSTRUCTOR_FIELDS_DO(macro) \ 3504 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3505 macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \ 3506 macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \ 3507 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 3508 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3509 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 3510 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); \ 3511 macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); 3512 3513 void java_lang_reflect_Constructor::compute_offsets() { 3514 InstanceKlass* k = vmClasses::reflect_Constructor_klass(); 3515 CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3516 } 3517 3518 #if INCLUDE_CDS 3519 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) { 3520 CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3521 } 3522 #endif 3523 3524 Handle java_lang_reflect_Constructor::create(TRAPS) { 3525 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3526 Symbol* name = vmSymbols::java_lang_reflect_Constructor(); 3527 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3528 InstanceKlass* ik = InstanceKlass::cast(k); 3529 // Ensure it is initialized 3530 ik->initialize(CHECK_NH); 3531 return ik->allocate_instance_handle(THREAD); 3532 } 3533 3534 oop java_lang_reflect_Constructor::clazz(oop reflect) { 3535 return reflect->obj_field(_clazz_offset); 3536 } 3537 3538 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) { 3539 reflect->obj_field_put(_clazz_offset, value); 3540 } 3541 3542 oop java_lang_reflect_Constructor::parameter_types(oop constructor) { 3543 return constructor->obj_field(_parameterTypes_offset); 3544 } 3545 3546 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) { 3547 constructor->obj_field_put(_parameterTypes_offset, value); 3548 } 3549 3550 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) { 3551 constructor->obj_field_put(_exceptionTypes_offset, value); 3552 } 3553 3554 int java_lang_reflect_Constructor::slot(oop reflect) { 3555 return reflect->int_field(_slot_offset); 3556 } 3557 3558 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) { 3559 reflect->int_field_put(_slot_offset, value); 3560 } 3561 3562 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) { 3563 constructor->int_field_put(_modifiers_offset, value); 3564 } 3565 3566 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) { 3567 constructor->obj_field_put(_signature_offset, value); 3568 } 3569 3570 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) { 3571 constructor->obj_field_put(_annotations_offset, value); 3572 } 3573 3574 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) { 3575 method->obj_field_put(_parameter_annotations_offset, value); 3576 } 3577 3578 int java_lang_reflect_Field::_clazz_offset; 3579 int java_lang_reflect_Field::_name_offset; 3580 int java_lang_reflect_Field::_type_offset; 3581 int java_lang_reflect_Field::_slot_offset; 3582 int java_lang_reflect_Field::_modifiers_offset; 3583 int java_lang_reflect_Field::_flags_offset; 3584 int java_lang_reflect_Field::_signature_offset; 3585 int java_lang_reflect_Field::_annotations_offset; 3586 3587 #define FIELD_FIELDS_DO(macro) \ 3588 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 3589 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3590 macro(_type_offset, k, vmSymbols::type_name(), class_signature, false); \ 3591 macro(_slot_offset, k, vmSymbols::slot_name(), int_signature, false); \ 3592 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3593 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \ 3594 macro(_signature_offset, k, vmSymbols::signature_name(), string_signature, false); \ 3595 macro(_annotations_offset, k, vmSymbols::annotations_name(), byte_array_signature, false); 3596 3597 void java_lang_reflect_Field::compute_offsets() { 3598 InstanceKlass* k = vmClasses::reflect_Field_klass(); 3599 FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3600 } 3601 3602 #if INCLUDE_CDS 3603 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) { 3604 FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3605 } 3606 #endif 3607 3608 Handle java_lang_reflect_Field::create(TRAPS) { 3609 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3610 Symbol* name = vmSymbols::java_lang_reflect_Field(); 3611 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3612 InstanceKlass* ik = InstanceKlass::cast(k); 3613 // Ensure it is initialized 3614 ik->initialize(CHECK_NH); 3615 return ik->allocate_instance_handle(THREAD); 3616 } 3617 3618 oop java_lang_reflect_Field::clazz(oop reflect) { 3619 return reflect->obj_field(_clazz_offset); 3620 } 3621 3622 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) { 3623 reflect->obj_field_put(_clazz_offset, value); 3624 } 3625 3626 oop java_lang_reflect_Field::name(oop field) { 3627 return field->obj_field(_name_offset); 3628 } 3629 3630 void java_lang_reflect_Field::set_name(oop field, oop value) { 3631 field->obj_field_put(_name_offset, value); 3632 } 3633 3634 oop java_lang_reflect_Field::type(oop field) { 3635 return field->obj_field(_type_offset); 3636 } 3637 3638 void java_lang_reflect_Field::set_type(oop field, oop value) { 3639 field->obj_field_put(_type_offset, value); 3640 } 3641 3642 int java_lang_reflect_Field::slot(oop reflect) { 3643 return reflect->int_field(_slot_offset); 3644 } 3645 3646 void java_lang_reflect_Field::set_slot(oop reflect, int value) { 3647 reflect->int_field_put(_slot_offset, value); 3648 } 3649 3650 int java_lang_reflect_Field::modifiers(oop field) { 3651 return field->int_field(_modifiers_offset); 3652 } 3653 3654 void java_lang_reflect_Field::set_modifiers(oop field, int value) { 3655 field->int_field_put(_modifiers_offset, value); 3656 } 3657 3658 void java_lang_reflect_Field::set_flags(oop field, int value) { 3659 field->int_field_put(_flags_offset, value); 3660 } 3661 3662 void java_lang_reflect_Field::set_signature(oop field, oop value) { 3663 field->obj_field_put(_signature_offset, value); 3664 } 3665 3666 void java_lang_reflect_Field::set_annotations(oop field, oop value) { 3667 field->obj_field_put(_annotations_offset, value); 3668 } 3669 3670 oop java_lang_reflect_RecordComponent::create(InstanceKlass* holder, RecordComponent* component, TRAPS) { 3671 // Allocate java.lang.reflect.RecordComponent instance 3672 HandleMark hm(THREAD); 3673 InstanceKlass* ik = vmClasses::RecordComponent_klass(); 3674 assert(ik != nullptr, "must be loaded"); 3675 ik->initialize(CHECK_NULL); 3676 3677 Handle element = ik->allocate_instance_handle(CHECK_NULL); 3678 3679 Handle decl_class(THREAD, holder->java_mirror()); 3680 java_lang_reflect_RecordComponent::set_clazz(element(), decl_class()); 3681 3682 Symbol* name = holder->constants()->symbol_at(component->name_index()); // name_index is a utf8 3683 oop component_name = StringTable::intern(name, CHECK_NULL); 3684 java_lang_reflect_RecordComponent::set_name(element(), component_name); 3685 3686 Symbol* type = holder->constants()->symbol_at(component->descriptor_index()); 3687 Handle component_type_h = 3688 SystemDictionary::find_java_mirror_for_type(type, holder, SignatureStream::NCDFError, CHECK_NULL); 3689 java_lang_reflect_RecordComponent::set_type(element(), component_type_h()); 3690 3691 Method* accessor_method = nullptr; 3692 { 3693 // Prepend "()" to type to create the full method signature. 3694 ResourceMark rm(THREAD); 3695 int sig_len = type->utf8_length() + 3; // "()" and null char 3696 char* sig = NEW_RESOURCE_ARRAY(char, sig_len); 3697 jio_snprintf(sig, sig_len, "%c%c%s", JVM_SIGNATURE_FUNC, JVM_SIGNATURE_ENDFUNC, type->as_C_string()); 3698 TempNewSymbol full_sig = SymbolTable::new_symbol(sig); 3699 accessor_method = holder->find_instance_method(name, full_sig, Klass::PrivateLookupMode::find); 3700 } 3701 3702 if (accessor_method != nullptr) { 3703 methodHandle method(THREAD, accessor_method); 3704 oop m = Reflection::new_method(method, false, CHECK_NULL); 3705 java_lang_reflect_RecordComponent::set_accessor(element(), m); 3706 } else { 3707 java_lang_reflect_RecordComponent::set_accessor(element(), nullptr); 3708 } 3709 3710 int sig_index = component->generic_signature_index(); 3711 if (sig_index > 0) { 3712 Symbol* sig = holder->constants()->symbol_at(sig_index); // sig_index is a utf8 3713 oop component_sig = StringTable::intern(sig, CHECK_NULL); 3714 java_lang_reflect_RecordComponent::set_signature(element(), component_sig); 3715 } else { 3716 java_lang_reflect_RecordComponent::set_signature(element(), nullptr); 3717 } 3718 3719 typeArrayOop annotation_oop = Annotations::make_java_array(component->annotations(), CHECK_NULL); 3720 java_lang_reflect_RecordComponent::set_annotations(element(), annotation_oop); 3721 3722 typeArrayOop type_annotation_oop = Annotations::make_java_array(component->type_annotations(), CHECK_NULL); 3723 java_lang_reflect_RecordComponent::set_typeAnnotations(element(), type_annotation_oop); 3724 3725 return element(); 3726 } 3727 3728 int reflect_ConstantPool::_oop_offset; 3729 3730 #define CONSTANTPOOL_FIELDS_DO(macro) \ 3731 macro(_oop_offset, k, "constantPoolOop", object_signature, false) 3732 3733 void reflect_ConstantPool::compute_offsets() { 3734 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass(); 3735 // The field is called ConstantPool* in the sun.reflect.ConstantPool class. 3736 CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3737 } 3738 3739 #if INCLUDE_CDS 3740 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) { 3741 CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3742 } 3743 #endif 3744 3745 int java_lang_reflect_Parameter::_name_offset; 3746 int java_lang_reflect_Parameter::_modifiers_offset; 3747 int java_lang_reflect_Parameter::_index_offset; 3748 int java_lang_reflect_Parameter::_executable_offset; 3749 3750 #define PARAMETER_FIELDS_DO(macro) \ 3751 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 3752 macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature, false); \ 3753 macro(_index_offset, k, vmSymbols::index_name(), int_signature, false); \ 3754 macro(_executable_offset, k, vmSymbols::executable_name(), executable_signature, false) 3755 3756 void java_lang_reflect_Parameter::compute_offsets() { 3757 InstanceKlass* k = vmClasses::reflect_Parameter_klass(); 3758 PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3759 } 3760 3761 #if INCLUDE_CDS 3762 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) { 3763 PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3764 } 3765 #endif 3766 3767 Handle java_lang_reflect_Parameter::create(TRAPS) { 3768 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3769 Symbol* name = vmSymbols::java_lang_reflect_Parameter(); 3770 Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH); 3771 InstanceKlass* ik = InstanceKlass::cast(k); 3772 // Ensure it is initialized 3773 ik->initialize(CHECK_NH); 3774 return ik->allocate_instance_handle(THREAD); 3775 } 3776 3777 oop java_lang_reflect_Parameter::name(oop param) { 3778 return param->obj_field(_name_offset); 3779 } 3780 3781 void java_lang_reflect_Parameter::set_name(oop param, oop value) { 3782 param->obj_field_put(_name_offset, value); 3783 } 3784 3785 int java_lang_reflect_Parameter::modifiers(oop param) { 3786 return param->int_field(_modifiers_offset); 3787 } 3788 3789 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) { 3790 param->int_field_put(_modifiers_offset, value); 3791 } 3792 3793 int java_lang_reflect_Parameter::index(oop param) { 3794 return param->int_field(_index_offset); 3795 } 3796 3797 void java_lang_reflect_Parameter::set_index(oop param, int value) { 3798 param->int_field_put(_index_offset, value); 3799 } 3800 3801 oop java_lang_reflect_Parameter::executable(oop param) { 3802 return param->obj_field(_executable_offset); 3803 } 3804 3805 void java_lang_reflect_Parameter::set_executable(oop param, oop value) { 3806 param->obj_field_put(_executable_offset, value); 3807 } 3808 3809 // java_lang_Module 3810 3811 int java_lang_Module::_loader_offset; 3812 int java_lang_Module::_name_offset; 3813 int java_lang_Module::_module_entry_offset; 3814 3815 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) { 3816 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3817 return JavaCalls::construct_new_instance(vmClasses::Module_klass(), 3818 vmSymbols::java_lang_module_init_signature(), 3819 loader, module_name, CHECK_NH); 3820 } 3821 3822 #define MODULE_FIELDS_DO(macro) \ 3823 macro(_loader_offset, k, vmSymbols::loader_name(), classloader_signature, false); \ 3824 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false) 3825 3826 void java_lang_Module::compute_offsets() { 3827 InstanceKlass* k = vmClasses::Module_klass(); 3828 MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3829 MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 3830 } 3831 3832 #if INCLUDE_CDS 3833 void java_lang_Module::serialize_offsets(SerializeClosure* f) { 3834 MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3835 MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 3836 } 3837 #endif 3838 3839 oop java_lang_Module::loader(oop module) { 3840 return module->obj_field(_loader_offset); 3841 } 3842 3843 void java_lang_Module::set_loader(oop module, oop value) { 3844 module->obj_field_put(_loader_offset, value); 3845 } 3846 3847 oop java_lang_Module::name(oop module) { 3848 return module->obj_field(_name_offset); 3849 } 3850 3851 void java_lang_Module::set_name(oop module, oop value) { 3852 module->obj_field_put(_name_offset, value); 3853 } 3854 3855 ModuleEntry* java_lang_Module::module_entry_raw(oop module) { 3856 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset"); 3857 assert(module != nullptr, "module can't be null"); 3858 assert(oopDesc::is_oop(module), "module must be oop"); 3859 3860 ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset); 3861 return module_entry; 3862 } 3863 3864 ModuleEntry* java_lang_Module::module_entry(oop module) { 3865 ModuleEntry* module_entry = module_entry_raw(module); 3866 if (module_entry == nullptr) { 3867 // If the inject field containing the ModuleEntry* is null then return the 3868 // class loader's unnamed module. 3869 oop loader = java_lang_Module::loader(module); 3870 Handle h_loader = Handle(Thread::current(), loader); 3871 ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader); 3872 return loader_cld->unnamed_module(); 3873 } 3874 return module_entry; 3875 } 3876 3877 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) { 3878 assert(_module_entry_offset != 0, "Uninitialized module_entry_offset"); 3879 assert(module != nullptr, "module can't be null"); 3880 assert(oopDesc::is_oop(module), "module must be oop"); 3881 module->address_field_put(_module_entry_offset, (address)module_entry); 3882 } 3883 3884 Handle reflect_ConstantPool::create(TRAPS) { 3885 assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem"); 3886 InstanceKlass* k = vmClasses::reflect_ConstantPool_klass(); 3887 // Ensure it is initialized 3888 k->initialize(CHECK_NH); 3889 return k->allocate_instance_handle(THREAD); 3890 } 3891 3892 3893 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) { 3894 oop mirror = value->pool_holder()->java_mirror(); 3895 // Save the mirror to get back the constant pool. 3896 reflect->obj_field_put(_oop_offset, mirror); 3897 } 3898 3899 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) { 3900 3901 oop mirror = reflect->obj_field(_oop_offset); 3902 Klass* k = java_lang_Class::as_Klass(mirror); 3903 assert(k->is_instance_klass(), "Must be"); 3904 3905 // Get the constant pool back from the klass. Since class redefinition 3906 // merges the new constant pool into the old, this is essentially the 3907 // same constant pool as the original. If constant pool merging is 3908 // no longer done in the future, this will have to change to save 3909 // the original. 3910 return InstanceKlass::cast(k)->constants(); 3911 } 3912 3913 3914 // Support for java_lang_ref_Reference 3915 3916 bool java_lang_ref_Reference::_offsets_initialized; 3917 3918 int java_lang_ref_Reference::_referent_offset; 3919 int java_lang_ref_Reference::_queue_offset; 3920 int java_lang_ref_Reference::_next_offset; 3921 int java_lang_ref_Reference::_discovered_offset; 3922 3923 #define REFERENCE_FIELDS_DO(macro) \ 3924 macro(_referent_offset, k, "referent", object_signature, false); \ 3925 macro(_queue_offset, k, "queue", referencequeue_signature, false); \ 3926 macro(_next_offset, k, "next", reference_signature, false); \ 3927 macro(_discovered_offset, k, "discovered", reference_signature, false); 3928 3929 void java_lang_ref_Reference::compute_offsets() { 3930 if (_offsets_initialized) { 3931 return; 3932 } 3933 _offsets_initialized = true; 3934 InstanceKlass* k = vmClasses::Reference_klass(); 3935 REFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3936 } 3937 3938 #if INCLUDE_CDS 3939 void java_lang_ref_Reference::serialize_offsets(SerializeClosure* f) { 3940 f->do_bool(&_offsets_initialized); 3941 REFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3942 } 3943 #endif 3944 3945 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) { 3946 assert(obj != nullptr, "sanity"); 3947 if (offset != _referent_offset) { 3948 return false; 3949 } 3950 3951 Klass* k = obj->klass(); 3952 if (!k->is_instance_klass()) { 3953 return false; 3954 } 3955 3956 InstanceKlass* ik = InstanceKlass::cast(obj->klass()); 3957 bool is_reference = ik->reference_type() != REF_NONE; 3958 assert(!is_reference || ik->is_subclass_of(vmClasses::Reference_klass()), "sanity"); 3959 return is_reference; 3960 } 3961 3962 int java_lang_boxing_object::_value_offset; 3963 int java_lang_boxing_object::_long_value_offset; 3964 3965 #define BOXING_FIELDS_DO(macro) \ 3966 macro(_value_offset, byteKlass, "value", byte_signature, false); \ 3967 macro(_long_value_offset, longKlass, "value", long_signature, false); 3968 3969 void java_lang_boxing_object::compute_offsets() { 3970 InstanceKlass* byteKlass = vmClasses::Byte_klass(); 3971 InstanceKlass* longKlass = vmClasses::Long_klass(); 3972 BOXING_FIELDS_DO(FIELD_COMPUTE_OFFSET); 3973 } 3974 3975 #if INCLUDE_CDS 3976 void java_lang_boxing_object::serialize_offsets(SerializeClosure* f) { 3977 BOXING_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 3978 } 3979 #endif 3980 3981 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) { 3982 Klass* k = vmClasses::box_klass(type); 3983 if (k == nullptr) return nullptr; 3984 InstanceKlass* ik = InstanceKlass::cast(k); 3985 if (!ik->is_initialized()) { 3986 ik->initialize(CHECK_NULL); 3987 } 3988 return ik->allocate_instance(THREAD); 3989 } 3990 3991 3992 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) { 3993 oop box = initialize_and_allocate(type, CHECK_NULL); 3994 if (box == nullptr) return nullptr; 3995 switch (type) { 3996 case T_BOOLEAN: 3997 box->bool_field_put(_value_offset, value->z); 3998 break; 3999 case T_CHAR: 4000 box->char_field_put(_value_offset, value->c); 4001 break; 4002 case T_FLOAT: 4003 box->float_field_put(_value_offset, value->f); 4004 break; 4005 case T_DOUBLE: 4006 box->double_field_put(_long_value_offset, value->d); 4007 break; 4008 case T_BYTE: 4009 box->byte_field_put(_value_offset, value->b); 4010 break; 4011 case T_SHORT: 4012 box->short_field_put(_value_offset, value->s); 4013 break; 4014 case T_INT: 4015 box->int_field_put(_value_offset, value->i); 4016 break; 4017 case T_LONG: 4018 box->long_field_put(_long_value_offset, value->j); 4019 break; 4020 default: 4021 return nullptr; 4022 } 4023 return box; 4024 } 4025 4026 4027 BasicType java_lang_boxing_object::basic_type(oop box) { 4028 if (box == nullptr) return T_ILLEGAL; 4029 BasicType type = vmClasses::box_klass_type(box->klass()); 4030 if (type == T_OBJECT) // 'unknown' value returned by SD::bkt 4031 return T_ILLEGAL; 4032 return type; 4033 } 4034 4035 4036 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) { 4037 BasicType type = vmClasses::box_klass_type(box->klass()); 4038 switch (type) { 4039 case T_BOOLEAN: 4040 value->z = box->bool_field(_value_offset); 4041 break; 4042 case T_CHAR: 4043 value->c = box->char_field(_value_offset); 4044 break; 4045 case T_FLOAT: 4046 value->f = box->float_field(_value_offset); 4047 break; 4048 case T_DOUBLE: 4049 value->d = box->double_field(_long_value_offset); 4050 break; 4051 case T_BYTE: 4052 value->b = box->byte_field(_value_offset); 4053 break; 4054 case T_SHORT: 4055 value->s = box->short_field(_value_offset); 4056 break; 4057 case T_INT: 4058 value->i = box->int_field(_value_offset); 4059 break; 4060 case T_LONG: 4061 value->j = box->long_field(_long_value_offset); 4062 break; 4063 default: 4064 return T_ILLEGAL; 4065 } // end switch 4066 return type; 4067 } 4068 4069 4070 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) { 4071 BasicType type = vmClasses::box_klass_type(box->klass()); 4072 switch (type) { 4073 case T_BOOLEAN: 4074 box->bool_field_put(_value_offset, value->z); 4075 break; 4076 case T_CHAR: 4077 box->char_field_put(_value_offset, value->c); 4078 break; 4079 case T_FLOAT: 4080 box->float_field_put(_value_offset, value->f); 4081 break; 4082 case T_DOUBLE: 4083 box->double_field_put(_long_value_offset, value->d); 4084 break; 4085 case T_BYTE: 4086 box->byte_field_put(_value_offset, value->b); 4087 break; 4088 case T_SHORT: 4089 box->short_field_put(_value_offset, value->s); 4090 break; 4091 case T_INT: 4092 box->int_field_put(_value_offset, value->i); 4093 break; 4094 case T_LONG: 4095 box->long_field_put(_long_value_offset, value->j); 4096 break; 4097 default: 4098 return T_ILLEGAL; 4099 } // end switch 4100 return type; 4101 } 4102 4103 4104 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) { 4105 switch (type) { 4106 case T_BOOLEAN: st->print("%s", value->z ? "true" : "false"); break; 4107 case T_CHAR: st->print("%d", value->c); break; 4108 case T_BYTE: st->print("%d", value->b); break; 4109 case T_SHORT: st->print("%d", value->s); break; 4110 case T_INT: st->print("%d", value->i); break; 4111 case T_LONG: st->print(JLONG_FORMAT, value->j); break; 4112 case T_FLOAT: st->print("%f", value->f); break; 4113 case T_DOUBLE: st->print("%lf", value->d); break; 4114 default: st->print("type %d?", type); break; 4115 } 4116 } 4117 4118 4119 // Support for java_lang_ref_SoftReference 4120 // 4121 4122 int java_lang_ref_SoftReference::_timestamp_offset; 4123 int java_lang_ref_SoftReference::_static_clock_offset; 4124 4125 #define SOFTREFERENCE_FIELDS_DO(macro) \ 4126 macro(_timestamp_offset, k, "timestamp", long_signature, false); \ 4127 macro(_static_clock_offset, k, "clock", long_signature, true) 4128 4129 void java_lang_ref_SoftReference::compute_offsets() { 4130 InstanceKlass* k = vmClasses::SoftReference_klass(); 4131 SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4132 } 4133 4134 #if INCLUDE_CDS 4135 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) { 4136 SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4137 } 4138 #endif 4139 4140 jlong java_lang_ref_SoftReference::timestamp(oop ref) { 4141 return ref->long_field(_timestamp_offset); 4142 } 4143 4144 jlong java_lang_ref_SoftReference::clock() { 4145 InstanceKlass* ik = vmClasses::SoftReference_klass(); 4146 oop base = ik->static_field_base_raw(); 4147 return base->long_field(_static_clock_offset); 4148 } 4149 4150 void java_lang_ref_SoftReference::set_clock(jlong value) { 4151 InstanceKlass* ik = vmClasses::SoftReference_klass(); 4152 oop base = ik->static_field_base_raw(); 4153 base->long_field_put(_static_clock_offset, value); 4154 } 4155 4156 // Support for java_lang_invoke_DirectMethodHandle 4157 4158 int java_lang_invoke_DirectMethodHandle::_member_offset; 4159 4160 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) { 4161 oop member_name = nullptr; 4162 assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh), 4163 "a DirectMethodHandle oop is expected"); 4164 return dmh->obj_field(_member_offset); 4165 } 4166 4167 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \ 4168 macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false) 4169 4170 void java_lang_invoke_DirectMethodHandle::compute_offsets() { 4171 InstanceKlass* k = vmClasses::DirectMethodHandle_klass(); 4172 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4173 } 4174 4175 #if INCLUDE_CDS 4176 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) { 4177 DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4178 } 4179 #endif 4180 4181 // Support for java_lang_invoke_MethodHandle 4182 4183 int java_lang_invoke_MethodHandle::_type_offset; 4184 int java_lang_invoke_MethodHandle::_form_offset; 4185 4186 int java_lang_invoke_MemberName::_clazz_offset; 4187 int java_lang_invoke_MemberName::_name_offset; 4188 int java_lang_invoke_MemberName::_type_offset; 4189 int java_lang_invoke_MemberName::_flags_offset; 4190 int java_lang_invoke_MemberName::_method_offset; 4191 int java_lang_invoke_MemberName::_vmindex_offset; 4192 4193 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset; 4194 int java_lang_invoke_ResolvedMethodName::_vmholder_offset; 4195 4196 int java_lang_invoke_LambdaForm::_vmentry_offset; 4197 4198 #define METHODHANDLE_FIELDS_DO(macro) \ 4199 macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \ 4200 macro(_form_offset, k, "form", java_lang_invoke_LambdaForm_signature, false) 4201 4202 void java_lang_invoke_MethodHandle::compute_offsets() { 4203 InstanceKlass* k = vmClasses::MethodHandle_klass(); 4204 METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4205 } 4206 4207 #if INCLUDE_CDS 4208 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) { 4209 METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4210 } 4211 #endif 4212 4213 #define MEMBERNAME_FIELDS_DO(macro) \ 4214 macro(_clazz_offset, k, vmSymbols::clazz_name(), class_signature, false); \ 4215 macro(_name_offset, k, vmSymbols::name_name(), string_signature, false); \ 4216 macro(_type_offset, k, vmSymbols::type_name(), object_signature, false); \ 4217 macro(_flags_offset, k, vmSymbols::flags_name(), int_signature, false); \ 4218 macro(_method_offset, k, vmSymbols::method_name(), java_lang_invoke_ResolvedMethodName_signature, false) 4219 4220 void java_lang_invoke_MemberName::compute_offsets() { 4221 InstanceKlass* k = vmClasses::MemberName_klass(); 4222 MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4223 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4224 } 4225 4226 #if INCLUDE_CDS 4227 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) { 4228 MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4229 MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4230 } 4231 #endif 4232 4233 #define RESOLVEDMETHOD_FIELDS_DO(macro) \ 4234 macro(_vmholder_offset, k, "vmholder", class_signature, false) 4235 4236 void java_lang_invoke_ResolvedMethodName::compute_offsets() { 4237 InstanceKlass* k = vmClasses::ResolvedMethodName_klass(); 4238 assert(k != nullptr, "jdk mismatch"); 4239 RESOLVEDMETHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4240 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4241 } 4242 4243 #if INCLUDE_CDS 4244 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) { 4245 RESOLVEDMETHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4246 RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4247 } 4248 #endif 4249 4250 #define LAMBDAFORM_FIELDS_DO(macro) \ 4251 macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false) 4252 4253 void java_lang_invoke_LambdaForm::compute_offsets() { 4254 InstanceKlass* k = vmClasses::LambdaForm_klass(); 4255 assert (k != nullptr, "jdk mismatch"); 4256 LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4257 } 4258 4259 #if INCLUDE_CDS 4260 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) { 4261 LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4262 } 4263 #endif 4264 4265 bool java_lang_invoke_LambdaForm::is_instance(oop obj) { 4266 return obj != nullptr && is_subclass(obj->klass()); 4267 } 4268 4269 int jdk_internal_foreign_abi_NativeEntryPoint::_method_type_offset; 4270 int jdk_internal_foreign_abi_NativeEntryPoint::_downcall_stub_address_offset; 4271 4272 #define NEP_FIELDS_DO(macro) \ 4273 macro(_method_type_offset, k, "methodType", java_lang_invoke_MethodType_signature, false); \ 4274 macro(_downcall_stub_address_offset, k, "downcallStubAddress", long_signature, false); 4275 4276 bool jdk_internal_foreign_abi_NativeEntryPoint::is_instance(oop obj) { 4277 return obj != nullptr && is_subclass(obj->klass()); 4278 } 4279 4280 void jdk_internal_foreign_abi_NativeEntryPoint::compute_offsets() { 4281 InstanceKlass* k = vmClasses::NativeEntryPoint_klass(); 4282 NEP_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4283 } 4284 4285 #if INCLUDE_CDS 4286 void jdk_internal_foreign_abi_NativeEntryPoint::serialize_offsets(SerializeClosure* f) { 4287 NEP_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4288 } 4289 #endif 4290 4291 oop jdk_internal_foreign_abi_NativeEntryPoint::method_type(oop entry) { 4292 return entry->obj_field(_method_type_offset); 4293 } 4294 4295 jlong jdk_internal_foreign_abi_NativeEntryPoint::downcall_stub_address(oop entry) { 4296 return entry->long_field(_downcall_stub_address_offset); 4297 } 4298 4299 int jdk_internal_foreign_abi_ABIDescriptor::_inputStorage_offset; 4300 int jdk_internal_foreign_abi_ABIDescriptor::_outputStorage_offset; 4301 int jdk_internal_foreign_abi_ABIDescriptor::_volatileStorage_offset; 4302 int jdk_internal_foreign_abi_ABIDescriptor::_stackAlignment_offset; 4303 int jdk_internal_foreign_abi_ABIDescriptor::_shadowSpace_offset; 4304 int jdk_internal_foreign_abi_ABIDescriptor::_scratch1_offset; 4305 int jdk_internal_foreign_abi_ABIDescriptor::_scratch2_offset; 4306 4307 #define ABIDescriptor_FIELDS_DO(macro) \ 4308 macro(_inputStorage_offset, k, "inputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \ 4309 macro(_outputStorage_offset, k, "outputStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \ 4310 macro(_volatileStorage_offset, k, "volatileStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \ 4311 macro(_stackAlignment_offset, k, "stackAlignment", int_signature, false); \ 4312 macro(_shadowSpace_offset, k, "shadowSpace", int_signature, false); \ 4313 macro(_scratch1_offset, k, "scratch1", jdk_internal_foreign_abi_VMStorage_signature, false); \ 4314 macro(_scratch2_offset, k, "scratch2", jdk_internal_foreign_abi_VMStorage_signature, false); 4315 4316 bool jdk_internal_foreign_abi_ABIDescriptor::is_instance(oop obj) { 4317 return obj != nullptr && is_subclass(obj->klass()); 4318 } 4319 4320 void jdk_internal_foreign_abi_ABIDescriptor::compute_offsets() { 4321 InstanceKlass* k = vmClasses::ABIDescriptor_klass(); 4322 ABIDescriptor_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4323 } 4324 4325 #if INCLUDE_CDS 4326 void jdk_internal_foreign_abi_ABIDescriptor::serialize_offsets(SerializeClosure* f) { 4327 ABIDescriptor_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4328 } 4329 #endif 4330 4331 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::inputStorage(oop entry) { 4332 return oop_cast<objArrayOop>(entry->obj_field(_inputStorage_offset)); 4333 } 4334 4335 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::outputStorage(oop entry) { 4336 return oop_cast<objArrayOop>(entry->obj_field(_outputStorage_offset)); 4337 } 4338 4339 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::volatileStorage(oop entry) { 4340 return oop_cast<objArrayOop>(entry->obj_field(_volatileStorage_offset)); 4341 } 4342 4343 jint jdk_internal_foreign_abi_ABIDescriptor::stackAlignment(oop entry) { 4344 return entry->int_field(_stackAlignment_offset); 4345 } 4346 4347 jint jdk_internal_foreign_abi_ABIDescriptor::shadowSpace(oop entry) { 4348 return entry->int_field(_shadowSpace_offset); 4349 } 4350 4351 oop jdk_internal_foreign_abi_ABIDescriptor::scratch1(oop entry) { 4352 return entry->obj_field(_scratch1_offset); 4353 } 4354 4355 oop jdk_internal_foreign_abi_ABIDescriptor::scratch2(oop entry) { 4356 return entry->obj_field(_scratch2_offset); 4357 } 4358 4359 int jdk_internal_foreign_abi_VMStorage::_type_offset; 4360 int jdk_internal_foreign_abi_VMStorage::_indexOrOffset_offset; 4361 int jdk_internal_foreign_abi_VMStorage::_segmentMaskOrSize_offset; 4362 int jdk_internal_foreign_abi_VMStorage::_debugName_offset; 4363 4364 #define VMStorage_FIELDS_DO(macro) \ 4365 macro(_type_offset, k, "type", byte_signature, false); \ 4366 macro(_indexOrOffset_offset, k, "indexOrOffset", int_signature, false); \ 4367 macro(_segmentMaskOrSize_offset, k, "segmentMaskOrSize", short_signature, false); \ 4368 macro(_debugName_offset, k, "debugName", string_signature, false); \ 4369 4370 bool jdk_internal_foreign_abi_VMStorage::is_instance(oop obj) { 4371 return obj != nullptr && is_subclass(obj->klass()); 4372 } 4373 4374 void jdk_internal_foreign_abi_VMStorage::compute_offsets() { 4375 InstanceKlass* k = vmClasses::VMStorage_klass(); 4376 VMStorage_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4377 } 4378 4379 #if INCLUDE_CDS 4380 void jdk_internal_foreign_abi_VMStorage::serialize_offsets(SerializeClosure* f) { 4381 VMStorage_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4382 } 4383 #endif 4384 4385 jbyte jdk_internal_foreign_abi_VMStorage::type(oop entry) { 4386 return entry->byte_field(_type_offset); 4387 } 4388 4389 jint jdk_internal_foreign_abi_VMStorage::index_or_offset(oop entry) { 4390 return entry->int_field(_indexOrOffset_offset); 4391 } 4392 4393 jshort jdk_internal_foreign_abi_VMStorage::segment_mask_or_size(oop entry) { 4394 return entry->short_field(_segmentMaskOrSize_offset); 4395 } 4396 4397 oop jdk_internal_foreign_abi_VMStorage::debugName(oop entry) { 4398 return entry->obj_field(_debugName_offset); 4399 } 4400 4401 int jdk_internal_foreign_abi_CallConv::_argRegs_offset; 4402 int jdk_internal_foreign_abi_CallConv::_retRegs_offset; 4403 4404 #define CallConv_FIELDS_DO(macro) \ 4405 macro(_argRegs_offset, k, "argRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \ 4406 macro(_retRegs_offset, k, "retRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \ 4407 4408 bool jdk_internal_foreign_abi_CallConv::is_instance(oop obj) { 4409 return obj != nullptr && is_subclass(obj->klass()); 4410 } 4411 4412 void jdk_internal_foreign_abi_CallConv::compute_offsets() { 4413 InstanceKlass* k = vmClasses::CallConv_klass(); 4414 CallConv_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4415 } 4416 4417 #if INCLUDE_CDS 4418 void jdk_internal_foreign_abi_CallConv::serialize_offsets(SerializeClosure* f) { 4419 CallConv_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4420 } 4421 #endif 4422 4423 objArrayOop jdk_internal_foreign_abi_CallConv::argRegs(oop entry) { 4424 return oop_cast<objArrayOop>(entry->obj_field(_argRegs_offset)); 4425 } 4426 4427 objArrayOop jdk_internal_foreign_abi_CallConv::retRegs(oop entry) { 4428 return oop_cast<objArrayOop>(entry->obj_field(_retRegs_offset)); 4429 } 4430 4431 oop java_lang_invoke_MethodHandle::type(oop mh) { 4432 return mh->obj_field(_type_offset); 4433 } 4434 4435 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) { 4436 mh->obj_field_put(_type_offset, mtype); 4437 } 4438 4439 oop java_lang_invoke_MethodHandle::form(oop mh) { 4440 assert(_form_offset != 0, ""); 4441 return mh->obj_field(_form_offset); 4442 } 4443 4444 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) { 4445 assert(_form_offset != 0, ""); 4446 mh->obj_field_put(_form_offset, lform); 4447 } 4448 4449 /// MemberName accessors 4450 4451 oop java_lang_invoke_MemberName::clazz(oop mname) { 4452 assert(is_instance(mname), "wrong type"); 4453 return mname->obj_field(_clazz_offset); 4454 } 4455 4456 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) { 4457 assert(is_instance(mname), "wrong type"); 4458 mname->obj_field_put(_clazz_offset, clazz); 4459 } 4460 4461 oop java_lang_invoke_MemberName::name(oop mname) { 4462 assert(is_instance(mname), "wrong type"); 4463 return mname->obj_field(_name_offset); 4464 } 4465 4466 void java_lang_invoke_MemberName::set_name(oop mname, oop name) { 4467 assert(is_instance(mname), "wrong type"); 4468 mname->obj_field_put(_name_offset, name); 4469 } 4470 4471 oop java_lang_invoke_MemberName::type(oop mname) { 4472 assert(is_instance(mname), "wrong type"); 4473 return mname->obj_field(_type_offset); 4474 } 4475 4476 void java_lang_invoke_MemberName::set_type(oop mname, oop type) { 4477 assert(is_instance(mname), "wrong type"); 4478 mname->obj_field_put(_type_offset, type); 4479 } 4480 4481 int java_lang_invoke_MemberName::flags(oop mname) { 4482 assert(is_instance(mname), "wrong type"); 4483 return mname->int_field(_flags_offset); 4484 } 4485 4486 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) { 4487 assert(is_instance(mname), "wrong type"); 4488 mname->int_field_put(_flags_offset, flags); 4489 } 4490 4491 // Return vmtarget from ResolvedMethodName method field through indirection 4492 Method* java_lang_invoke_MemberName::vmtarget(oop mname) { 4493 assert(is_instance(mname), "wrong type"); 4494 oop method = mname->obj_field(_method_offset); 4495 return method == nullptr ? nullptr : java_lang_invoke_ResolvedMethodName::vmtarget(method); 4496 } 4497 4498 bool java_lang_invoke_MemberName::is_method(oop mname) { 4499 assert(is_instance(mname), "must be MemberName"); 4500 return (flags(mname) & (MN_IS_METHOD | MN_IS_OBJECT_CONSTRUCTOR)) > 0; 4501 } 4502 4503 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) { 4504 assert(is_instance(mname), "wrong type"); 4505 mname->obj_field_put(_method_offset, resolved_method); 4506 } 4507 4508 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) { 4509 assert(is_instance(mname), "wrong type"); 4510 return (intptr_t) mname->address_field(_vmindex_offset); 4511 } 4512 4513 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) { 4514 assert(is_instance(mname), "wrong type"); 4515 mname->address_field_put(_vmindex_offset, (address) index); 4516 } 4517 4518 4519 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) { 4520 assert(is_instance(resolved_method), "wrong type"); 4521 Method* m = (Method*)resolved_method->address_field(_vmtarget_offset); 4522 assert(m->is_method(), "must be"); 4523 return m; 4524 } 4525 4526 // Used by redefinition to change Method* to new Method* with same hash (name, signature) 4527 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) { 4528 assert(is_instance(resolved_method), "wrong type"); 4529 resolved_method->address_field_put(_vmtarget_offset, (address)m); 4530 } 4531 4532 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) { 4533 assert(is_instance(resolved_method), "wrong type"); 4534 resolved_method->obj_field_put(_vmholder_offset, holder); 4535 } 4536 4537 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) { 4538 const Method* method = m(); 4539 4540 // lookup ResolvedMethod oop in the table, or create a new one and intern it 4541 oop resolved_method = ResolvedMethodTable::find_method(method); 4542 if (resolved_method != nullptr) { 4543 return resolved_method; 4544 } 4545 4546 InstanceKlass* k = vmClasses::ResolvedMethodName_klass(); 4547 if (!k->is_initialized()) { 4548 k->initialize(CHECK_NULL); 4549 } 4550 4551 oop new_resolved_method = k->allocate_instance(CHECK_NULL); 4552 4553 NoSafepointVerifier nsv; 4554 4555 if (method->is_old()) { 4556 method = (method->is_deleted()) ? Universe::throw_no_such_method_error() : 4557 method->get_new_method(); 4558 } 4559 4560 InstanceKlass* holder = method->method_holder(); 4561 4562 set_vmtarget(new_resolved_method, const_cast<Method*>(method)); 4563 // Add a reference to the loader (actually mirror because hidden classes may not have 4564 // distinct loaders) to ensure the metadata is kept alive. 4565 // This mirror may be different than the one in clazz field. 4566 set_vmholder(new_resolved_method, holder->java_mirror()); 4567 4568 // Set flag in class to indicate this InstanceKlass has entries in the table 4569 // to avoid walking table during redefinition if none of the redefined classes 4570 // have any membernames in the table. 4571 holder->set_has_resolved_methods(); 4572 4573 return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method)); 4574 } 4575 4576 oop java_lang_invoke_LambdaForm::vmentry(oop lform) { 4577 assert(is_instance(lform), "wrong type"); 4578 return lform->obj_field(_vmentry_offset); 4579 } 4580 4581 4582 // Support for java_lang_invoke_MethodType 4583 4584 int java_lang_invoke_MethodType::_rtype_offset; 4585 int java_lang_invoke_MethodType::_ptypes_offset; 4586 4587 #define METHODTYPE_FIELDS_DO(macro) \ 4588 macro(_rtype_offset, k, "rtype", class_signature, false); \ 4589 macro(_ptypes_offset, k, "ptypes", class_array_signature, false) 4590 4591 void java_lang_invoke_MethodType::compute_offsets() { 4592 InstanceKlass* k = vmClasses::MethodType_klass(); 4593 METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4594 } 4595 4596 #if INCLUDE_CDS 4597 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) { 4598 METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4599 } 4600 #endif 4601 4602 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) { 4603 st->print("("); 4604 objArrayOop pts = ptypes(mt); 4605 if (pts != nullptr) { 4606 for (int i = 0, limit = pts->length(); i < limit; i++) { 4607 java_lang_Class::print_signature(pts->obj_at(i), st); 4608 } 4609 } else { 4610 st->print("null"); 4611 } 4612 st->print(")"); 4613 oop rt = rtype(mt); 4614 if (rt != nullptr) { 4615 java_lang_Class::print_signature(rt, st); 4616 } else { 4617 st->print("null"); 4618 } 4619 } 4620 4621 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) { 4622 ResourceMark rm; 4623 stringStream buffer(128); 4624 print_signature(mt, &buffer); 4625 const char* sigstr = buffer.base(); 4626 int siglen = (int) buffer.size(); 4627 Symbol *name; 4628 if (!intern_if_not_found) { 4629 name = SymbolTable::probe(sigstr, siglen); 4630 } else { 4631 name = SymbolTable::new_symbol(sigstr, siglen); 4632 } 4633 return name; 4634 } 4635 4636 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) { 4637 if (mt1 == mt2) 4638 return true; 4639 if (rtype(mt1) != rtype(mt2)) 4640 return false; 4641 if (ptype_count(mt1) != ptype_count(mt2)) 4642 return false; 4643 for (int i = ptype_count(mt1) - 1; i >= 0; i--) { 4644 if (ptype(mt1, i) != ptype(mt2, i)) 4645 return false; 4646 } 4647 return true; 4648 } 4649 4650 oop java_lang_invoke_MethodType::rtype(oop mt) { 4651 assert(is_instance(mt), "must be a MethodType"); 4652 return mt->obj_field(_rtype_offset); 4653 } 4654 4655 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) { 4656 assert(is_instance(mt), "must be a MethodType"); 4657 return (objArrayOop) mt->obj_field(_ptypes_offset); 4658 } 4659 4660 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) { 4661 return ptypes(mt)->obj_at(idx); 4662 } 4663 4664 int java_lang_invoke_MethodType::ptype_count(oop mt) { 4665 return ptypes(mt)->length(); 4666 } 4667 4668 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) { 4669 objArrayOop pts = ptypes(mt); 4670 int count = pts->length(); 4671 int slots = 0; 4672 for (int i = 0; i < count; i++) { 4673 BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i)); 4674 slots += type2size[bt]; 4675 } 4676 return slots; 4677 } 4678 4679 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) { 4680 BasicType bt = java_lang_Class::as_BasicType(rtype(mt)); 4681 return type2size[bt]; 4682 } 4683 4684 4685 // Support for java_lang_invoke_CallSite 4686 4687 int java_lang_invoke_CallSite::_target_offset; 4688 int java_lang_invoke_CallSite::_context_offset; 4689 4690 #define CALLSITE_FIELDS_DO(macro) \ 4691 macro(_target_offset, k, "target", java_lang_invoke_MethodHandle_signature, false); \ 4692 macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false) 4693 4694 void java_lang_invoke_CallSite::compute_offsets() { 4695 InstanceKlass* k = vmClasses::CallSite_klass(); 4696 CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4697 } 4698 4699 #if INCLUDE_CDS 4700 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) { 4701 CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4702 } 4703 #endif 4704 4705 oop java_lang_invoke_CallSite::context_no_keepalive(oop call_site) { 4706 assert(java_lang_invoke_CallSite::is_instance(call_site), ""); 4707 4708 oop dep_oop = call_site->obj_field_access<AS_NO_KEEPALIVE>(_context_offset); 4709 return dep_oop; 4710 } 4711 4712 // Support for java_lang_invoke_ConstantCallSite 4713 4714 int java_lang_invoke_ConstantCallSite::_is_frozen_offset; 4715 4716 #define CONSTANTCALLSITE_FIELDS_DO(macro) \ 4717 macro(_is_frozen_offset, k, "isFrozen", bool_signature, false) 4718 4719 void java_lang_invoke_ConstantCallSite::compute_offsets() { 4720 InstanceKlass* k = vmClasses::ConstantCallSite_klass(); 4721 CONSTANTCALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4722 } 4723 4724 #if INCLUDE_CDS 4725 void java_lang_invoke_ConstantCallSite::serialize_offsets(SerializeClosure* f) { 4726 CONSTANTCALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4727 } 4728 #endif 4729 4730 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext 4731 4732 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset; 4733 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_last_cleanup_offset; 4734 4735 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() { 4736 InstanceKlass* k = vmClasses::Context_klass(); 4737 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4738 } 4739 4740 #if INCLUDE_CDS 4741 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) { 4742 CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4743 } 4744 #endif 4745 4746 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) { 4747 assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), ""); 4748 nmethodBucket* volatile* vmdeps_addr = call_site->field_addr<nmethodBucket* volatile>(_vmdependencies_offset); 4749 volatile uint64_t* last_cleanup_addr = call_site->field_addr<volatile uint64_t>(_last_cleanup_offset); 4750 DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr); 4751 return dep_ctx; 4752 } 4753 4754 // Support for java_lang_ClassLoader 4755 4756 int java_lang_ClassLoader::_loader_data_offset; 4757 int java_lang_ClassLoader::_parallelCapable_offset; 4758 int java_lang_ClassLoader::_name_offset; 4759 int java_lang_ClassLoader::_nameAndId_offset; 4760 int java_lang_ClassLoader::_unnamedModule_offset; 4761 int java_lang_ClassLoader::_parent_offset; 4762 4763 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) { 4764 assert(loader != nullptr, "loader must not be null"); 4765 assert(oopDesc::is_oop(loader), "loader must be oop"); 4766 return Atomic::load_acquire(loader->field_addr<ClassLoaderData*>(_loader_data_offset)); 4767 } 4768 4769 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) { 4770 assert(loader != nullptr, "loader must not be null"); 4771 assert(oopDesc::is_oop(loader), "loader must be oop"); 4772 return *loader->field_addr<ClassLoaderData*>(_loader_data_offset); 4773 } 4774 4775 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) { 4776 assert(loader != nullptr, "loader must not be null"); 4777 assert(oopDesc::is_oop(loader), "loader must be oop"); 4778 Atomic::release_store(loader->field_addr<ClassLoaderData*>(_loader_data_offset), new_data); 4779 } 4780 4781 #define CLASSLOADER_FIELDS_DO(macro) \ 4782 macro(_parallelCapable_offset, k1, "parallelLockMap", concurrenthashmap_signature, false); \ 4783 macro(_name_offset, k1, vmSymbols::name_name(), string_signature, false); \ 4784 macro(_nameAndId_offset, k1, "nameAndId", string_signature, false); \ 4785 macro(_unnamedModule_offset, k1, "unnamedModule", module_signature, false); \ 4786 macro(_parent_offset, k1, "parent", classloader_signature, false) 4787 4788 void java_lang_ClassLoader::compute_offsets() { 4789 InstanceKlass* k1 = vmClasses::ClassLoader_klass(); 4790 CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4791 4792 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 4793 } 4794 4795 #if INCLUDE_CDS 4796 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) { 4797 CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4798 CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 4799 } 4800 #endif 4801 4802 oop java_lang_ClassLoader::parent(oop loader) { 4803 assert(is_instance(loader), "loader must be oop"); 4804 return loader->obj_field(_parent_offset); 4805 } 4806 4807 oop java_lang_ClassLoader::parent_no_keepalive(oop loader) { 4808 assert(is_instance(loader), "loader must be oop"); 4809 return loader->obj_field_access<AS_NO_KEEPALIVE>(_parent_offset); 4810 } 4811 4812 // Returns the name field of this class loader. If the name field has not 4813 // been set, null will be returned. 4814 oop java_lang_ClassLoader::name(oop loader) { 4815 assert(is_instance(loader), "loader must be oop"); 4816 return loader->obj_field(_name_offset); 4817 } 4818 4819 // Returns the nameAndId field of this class loader. The format is 4820 // as follows: 4821 // If the defining loader has a name explicitly set then '<loader-name>' @<id> 4822 // If the defining loader has no name then <qualified-class-name> @<id> 4823 // If built-in loader, then omit '@<id>' as there is only one instance. 4824 // Use ClassLoader::loader_name_id() to obtain this String as a char*. 4825 oop java_lang_ClassLoader::nameAndId(oop loader) { 4826 assert(is_instance(loader), "loader must be oop"); 4827 return loader->obj_field(_nameAndId_offset); 4828 } 4829 4830 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) { 4831 assert(is_instance(loader), "loader must be oop"); 4832 assert(cl == nullptr || is_instance(cl), "cl argument must be oop"); 4833 oop acl = loader; 4834 debug_only(jint loop_count = 0); 4835 // This loop taken verbatim from ClassLoader.java: 4836 do { 4837 acl = parent(acl); 4838 if (cl == acl) { 4839 return true; 4840 } 4841 assert(++loop_count > 0, "loop_count overflow"); 4842 } while (acl != nullptr); 4843 return false; 4844 } 4845 4846 bool java_lang_ClassLoader::is_instance(oop obj) { 4847 return obj != nullptr && is_subclass(obj->klass()); 4848 } 4849 4850 4851 // For class loader classes, parallelCapable defined 4852 // based on non-null field 4853 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it 4854 bool java_lang_ClassLoader::parallelCapable(oop class_loader) { 4855 assert(_parallelCapable_offset != 0, "offsets should have been initialized"); 4856 return (class_loader->obj_field(_parallelCapable_offset) != nullptr); 4857 } 4858 4859 bool java_lang_ClassLoader::is_trusted_loader(oop loader) { 4860 oop cl = SystemDictionary::java_system_loader(); 4861 while(cl != nullptr) { 4862 if (cl == loader) return true; 4863 cl = parent(cl); 4864 } 4865 return false; 4866 } 4867 4868 oop java_lang_ClassLoader::unnamedModule(oop loader) { 4869 assert(is_instance(loader), "loader must be oop"); 4870 return loader->obj_field(_unnamedModule_offset); 4871 } 4872 4873 // Support for java_lang_System 4874 // 4875 4876 int java_lang_System::_static_in_offset; 4877 int java_lang_System::_static_out_offset; 4878 int java_lang_System::_static_err_offset; 4879 4880 #define SYSTEM_FIELDS_DO(macro) \ 4881 macro(_static_in_offset, k, "in", input_stream_signature, true); \ 4882 macro(_static_out_offset, k, "out", print_stream_signature, true); \ 4883 macro(_static_err_offset, k, "err", print_stream_signature, true); 4884 4885 void java_lang_System::compute_offsets() { 4886 InstanceKlass* k = vmClasses::System_klass(); 4887 SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4888 } 4889 4890 #if INCLUDE_CDS 4891 void java_lang_System::serialize_offsets(SerializeClosure* f) { 4892 SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4893 } 4894 #endif 4895 4896 // Support for jdk_internal_misc_UnsafeConstants 4897 // 4898 class UnsafeConstantsFixup : public FieldClosure { 4899 private: 4900 int _address_size; 4901 int _page_size; 4902 bool _big_endian; 4903 bool _use_unaligned_access; 4904 int _data_cache_line_flush_size; 4905 public: 4906 UnsafeConstantsFixup() { 4907 // round up values for all static final fields 4908 _address_size = sizeof(void*); 4909 _page_size = AIX_ONLY(sysconf(_SC_PAGESIZE)) NOT_AIX((int)os::vm_page_size()); 4910 _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true); 4911 _use_unaligned_access = UseUnalignedAccesses; 4912 _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size(); 4913 } 4914 4915 void do_field(fieldDescriptor* fd) { 4916 oop mirror = fd->field_holder()->java_mirror(); 4917 assert(mirror != nullptr, "UnsafeConstants must have mirror already"); 4918 assert(fd->field_holder() == vmClasses::UnsafeConstants_klass(), "Should be UnsafeConstants"); 4919 assert(fd->is_final(), "fields of UnsafeConstants must be final"); 4920 assert(fd->is_static(), "fields of UnsafeConstants must be static"); 4921 if (fd->name() == vmSymbols::address_size_name()) { 4922 mirror->int_field_put(fd->offset(), _address_size); 4923 } else if (fd->name() == vmSymbols::page_size_name()) { 4924 mirror->int_field_put(fd->offset(), _page_size); 4925 } else if (fd->name() == vmSymbols::big_endian_name()) { 4926 mirror->bool_field_put(fd->offset(), _big_endian); 4927 } else if (fd->name() == vmSymbols::use_unaligned_access_name()) { 4928 mirror->bool_field_put(fd->offset(), _use_unaligned_access); 4929 } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) { 4930 mirror->int_field_put(fd->offset(), _data_cache_line_flush_size); 4931 } else { 4932 assert(false, "unexpected UnsafeConstants field"); 4933 } 4934 } 4935 }; 4936 4937 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() { 4938 UnsafeConstantsFixup fixup; 4939 vmClasses::UnsafeConstants_klass()->do_local_static_fields(&fixup); 4940 } 4941 4942 4943 // java_lang_StackTraceElement 4944 4945 int java_lang_StackTraceElement::_methodName_offset; 4946 int java_lang_StackTraceElement::_fileName_offset; 4947 int java_lang_StackTraceElement::_lineNumber_offset; 4948 int java_lang_StackTraceElement::_moduleName_offset; 4949 int java_lang_StackTraceElement::_moduleVersion_offset; 4950 int java_lang_StackTraceElement::_classLoaderName_offset; 4951 int java_lang_StackTraceElement::_declaringClass_offset; 4952 int java_lang_StackTraceElement::_declaringClassObject_offset; 4953 4954 #define STACKTRACEELEMENT_FIELDS_DO(macro) \ 4955 macro(_declaringClassObject_offset, k, "declaringClassObject", class_signature, false); \ 4956 macro(_classLoaderName_offset, k, "classLoaderName", string_signature, false); \ 4957 macro(_moduleName_offset, k, "moduleName", string_signature, false); \ 4958 macro(_moduleVersion_offset, k, "moduleVersion", string_signature, false); \ 4959 macro(_declaringClass_offset, k, "declaringClass", string_signature, false); \ 4960 macro(_methodName_offset, k, "methodName", string_signature, false); \ 4961 macro(_fileName_offset, k, "fileName", string_signature, false); \ 4962 macro(_lineNumber_offset, k, "lineNumber", int_signature, false) 4963 4964 // Support for java_lang_StackTraceElement 4965 void java_lang_StackTraceElement::compute_offsets() { 4966 InstanceKlass* k = vmClasses::StackTraceElement_klass(); 4967 STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 4968 } 4969 4970 #if INCLUDE_CDS 4971 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) { 4972 STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 4973 } 4974 #endif 4975 4976 void java_lang_StackTraceElement::set_fileName(oop element, oop value) { 4977 element->obj_field_put(_fileName_offset, value); 4978 } 4979 4980 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) { 4981 element->obj_field_put(_declaringClass_offset, value); 4982 } 4983 4984 void java_lang_StackTraceElement::set_methodName(oop element, oop value) { 4985 element->obj_field_put(_methodName_offset, value); 4986 } 4987 4988 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) { 4989 element->int_field_put(_lineNumber_offset, value); 4990 } 4991 4992 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) { 4993 element->obj_field_put(_moduleName_offset, value); 4994 } 4995 4996 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) { 4997 element->obj_field_put(_moduleVersion_offset, value); 4998 } 4999 5000 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) { 5001 element->obj_field_put(_classLoaderName_offset, value); 5002 } 5003 5004 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) { 5005 element->obj_field_put(_declaringClassObject_offset, value); 5006 } 5007 5008 5009 // java_lang_AssertionStatusDirectives 5010 5011 int java_lang_AssertionStatusDirectives::_classes_offset; 5012 int java_lang_AssertionStatusDirectives::_classEnabled_offset; 5013 int java_lang_AssertionStatusDirectives::_packages_offset; 5014 int java_lang_AssertionStatusDirectives::_packageEnabled_offset; 5015 int java_lang_AssertionStatusDirectives::_deflt_offset; 5016 5017 // Support for java Assertions - java_lang_AssertionStatusDirectives. 5018 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \ 5019 macro(_classes_offset, k, "classes", string_array_signature, false); \ 5020 macro(_classEnabled_offset, k, "classEnabled", bool_array_signature, false); \ 5021 macro(_packages_offset, k, "packages", string_array_signature, false); \ 5022 macro(_packageEnabled_offset, k, "packageEnabled", bool_array_signature, false); \ 5023 macro(_deflt_offset, k, "deflt", bool_signature, false) 5024 5025 void java_lang_AssertionStatusDirectives::compute_offsets() { 5026 InstanceKlass* k = vmClasses::AssertionStatusDirectives_klass(); 5027 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5028 } 5029 5030 #if INCLUDE_CDS 5031 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) { 5032 ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5033 } 5034 #endif 5035 5036 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) { 5037 o->obj_field_put(_classes_offset, val); 5038 } 5039 5040 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) { 5041 o->obj_field_put(_classEnabled_offset, val); 5042 } 5043 5044 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) { 5045 o->obj_field_put(_packages_offset, val); 5046 } 5047 5048 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) { 5049 o->obj_field_put(_packageEnabled_offset, val); 5050 } 5051 5052 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) { 5053 o->bool_field_put(_deflt_offset, val); 5054 } 5055 5056 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset; 5057 5058 #define AOS_FIELDS_DO(macro) \ 5059 macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false) 5060 5061 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() { 5062 InstanceKlass* k = vmClasses::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass(); 5063 AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5064 } 5065 5066 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) { 5067 assert(_owner_offset != 0, "Must be initialized"); 5068 return obj->obj_field(_owner_offset); 5069 } 5070 5071 #if INCLUDE_CDS 5072 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) { 5073 AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5074 } 5075 #endif 5076 5077 int vector_VectorPayload::_payload_offset; 5078 5079 #define VECTORPAYLOAD_FIELDS_DO(macro) \ 5080 macro(_payload_offset, k, "payload", object_signature, false) 5081 5082 void vector_VectorPayload::compute_offsets() { 5083 InstanceKlass* k = vmClasses::vector_VectorPayload_klass(); 5084 VECTORPAYLOAD_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5085 } 5086 5087 #if INCLUDE_CDS 5088 void vector_VectorPayload::serialize_offsets(SerializeClosure* f) { 5089 VECTORPAYLOAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5090 } 5091 #endif 5092 5093 void vector_VectorPayload::set_payload(oop o, oop val) { 5094 o->obj_field_put(_payload_offset, val); 5095 } 5096 5097 bool vector_VectorPayload::is_instance(oop obj) { 5098 return obj != nullptr && is_subclass(obj->klass()); 5099 } 5100 5101 int java_lang_Integer_IntegerCache::_static_cache_offset; 5102 int java_lang_Long_LongCache::_static_cache_offset; 5103 int java_lang_Character_CharacterCache::_static_cache_offset; 5104 int java_lang_Short_ShortCache::_static_cache_offset; 5105 int java_lang_Byte_ByteCache::_static_cache_offset; 5106 5107 #define INTEGER_CACHE_FIELDS_DO(macro) \ 5108 macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true) 5109 5110 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) { 5111 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5112 INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5113 } 5114 5115 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) { 5116 oop base = ik->static_field_base_raw(); 5117 return objArrayOop(base->obj_field(_static_cache_offset)); 5118 } 5119 5120 Symbol* java_lang_Integer_IntegerCache::symbol() { 5121 return vmSymbols::java_lang_Integer_IntegerCache(); 5122 } 5123 5124 #if INCLUDE_CDS 5125 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) { 5126 INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5127 } 5128 #endif 5129 #undef INTEGER_CACHE_FIELDS_DO 5130 5131 jint java_lang_Integer::value(oop obj) { 5132 jvalue v; 5133 java_lang_boxing_object::get_value(obj, &v); 5134 return v.i; 5135 } 5136 5137 #define LONG_CACHE_FIELDS_DO(macro) \ 5138 macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true) 5139 5140 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) { 5141 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5142 LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5143 } 5144 5145 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) { 5146 oop base = ik->static_field_base_raw(); 5147 return objArrayOop(base->obj_field(_static_cache_offset)); 5148 } 5149 5150 Symbol* java_lang_Long_LongCache::symbol() { 5151 return vmSymbols::java_lang_Long_LongCache(); 5152 } 5153 5154 #if INCLUDE_CDS 5155 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) { 5156 LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5157 } 5158 #endif 5159 #undef LONG_CACHE_FIELDS_DO 5160 5161 jlong java_lang_Long::value(oop obj) { 5162 jvalue v; 5163 java_lang_boxing_object::get_value(obj, &v); 5164 return v.j; 5165 } 5166 5167 #define CHARACTER_CACHE_FIELDS_DO(macro) \ 5168 macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true) 5169 5170 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) { 5171 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5172 CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5173 } 5174 5175 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) { 5176 oop base = ik->static_field_base_raw(); 5177 return objArrayOop(base->obj_field(_static_cache_offset)); 5178 } 5179 5180 Symbol* java_lang_Character_CharacterCache::symbol() { 5181 return vmSymbols::java_lang_Character_CharacterCache(); 5182 } 5183 5184 #if INCLUDE_CDS 5185 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) { 5186 CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5187 } 5188 #endif 5189 #undef CHARACTER_CACHE_FIELDS_DO 5190 5191 jchar java_lang_Character::value(oop obj) { 5192 jvalue v; 5193 java_lang_boxing_object::get_value(obj, &v); 5194 return v.c; 5195 } 5196 5197 #define SHORT_CACHE_FIELDS_DO(macro) \ 5198 macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true) 5199 5200 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) { 5201 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5202 SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5203 } 5204 5205 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) { 5206 oop base = ik->static_field_base_raw(); 5207 return objArrayOop(base->obj_field(_static_cache_offset)); 5208 } 5209 5210 Symbol* java_lang_Short_ShortCache::symbol() { 5211 return vmSymbols::java_lang_Short_ShortCache(); 5212 } 5213 5214 #if INCLUDE_CDS 5215 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) { 5216 SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5217 } 5218 #endif 5219 #undef SHORT_CACHE_FIELDS_DO 5220 5221 jshort java_lang_Short::value(oop obj) { 5222 jvalue v; 5223 java_lang_boxing_object::get_value(obj, &v); 5224 return v.s; 5225 } 5226 5227 #define BYTE_CACHE_FIELDS_DO(macro) \ 5228 macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true) 5229 5230 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) { 5231 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5232 BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5233 } 5234 5235 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) { 5236 oop base = ik->static_field_base_raw(); 5237 return objArrayOop(base->obj_field(_static_cache_offset)); 5238 } 5239 5240 Symbol* java_lang_Byte_ByteCache::symbol() { 5241 return vmSymbols::java_lang_Byte_ByteCache(); 5242 } 5243 5244 #if INCLUDE_CDS 5245 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) { 5246 BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5247 } 5248 #endif 5249 #undef BYTE_CACHE_FIELDS_DO 5250 5251 jbyte java_lang_Byte::value(oop obj) { 5252 jvalue v; 5253 java_lang_boxing_object::get_value(obj, &v); 5254 return v.b; 5255 } 5256 5257 int java_lang_Boolean::_static_TRUE_offset; 5258 int java_lang_Boolean::_static_FALSE_offset; 5259 5260 #define BOOLEAN_FIELDS_DO(macro) \ 5261 macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \ 5262 macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true) 5263 5264 5265 void java_lang_Boolean::compute_offsets(InstanceKlass *k) { 5266 guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized"); 5267 BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5268 } 5269 5270 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) { 5271 oop base = ik->static_field_base_raw(); 5272 return base->obj_field(_static_TRUE_offset); 5273 } 5274 5275 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) { 5276 oop base = ik->static_field_base_raw(); 5277 return base->obj_field(_static_FALSE_offset); 5278 } 5279 5280 Symbol* java_lang_Boolean::symbol() { 5281 return vmSymbols::java_lang_Boolean(); 5282 } 5283 5284 #if INCLUDE_CDS 5285 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) { 5286 BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5287 } 5288 #endif 5289 #undef BOOLEAN_CACHE_FIELDS_DO 5290 5291 jboolean java_lang_Boolean::value(oop obj) { 5292 jvalue v; 5293 java_lang_boxing_object::get_value(obj, &v); 5294 return v.z; 5295 } 5296 5297 // java_lang_reflect_RecordComponent 5298 5299 int java_lang_reflect_RecordComponent::_clazz_offset; 5300 int java_lang_reflect_RecordComponent::_name_offset; 5301 int java_lang_reflect_RecordComponent::_type_offset; 5302 int java_lang_reflect_RecordComponent::_accessor_offset; 5303 int java_lang_reflect_RecordComponent::_signature_offset; 5304 int java_lang_reflect_RecordComponent::_annotations_offset; 5305 int java_lang_reflect_RecordComponent::_typeAnnotations_offset; 5306 5307 #define RECORDCOMPONENT_FIELDS_DO(macro) \ 5308 macro(_clazz_offset, k, "clazz", class_signature, false); \ 5309 macro(_name_offset, k, "name", string_signature, false); \ 5310 macro(_type_offset, k, "type", class_signature, false); \ 5311 macro(_accessor_offset, k, "accessor", reflect_method_signature, false); \ 5312 macro(_signature_offset, k, "signature", string_signature, false); \ 5313 macro(_annotations_offset, k, "annotations", byte_array_signature, false); \ 5314 macro(_typeAnnotations_offset, k, "typeAnnotations", byte_array_signature, false); 5315 5316 // Support for java_lang_reflect_RecordComponent 5317 void java_lang_reflect_RecordComponent::compute_offsets() { 5318 InstanceKlass* k = vmClasses::RecordComponent_klass(); 5319 RECORDCOMPONENT_FIELDS_DO(FIELD_COMPUTE_OFFSET); 5320 } 5321 5322 #if INCLUDE_CDS 5323 void java_lang_reflect_RecordComponent::serialize_offsets(SerializeClosure* f) { 5324 RECORDCOMPONENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET); 5325 } 5326 #endif 5327 5328 void java_lang_reflect_RecordComponent::set_clazz(oop element, oop value) { 5329 element->obj_field_put(_clazz_offset, value); 5330 } 5331 5332 void java_lang_reflect_RecordComponent::set_name(oop element, oop value) { 5333 element->obj_field_put(_name_offset, value); 5334 } 5335 5336 void java_lang_reflect_RecordComponent::set_type(oop element, oop value) { 5337 element->obj_field_put(_type_offset, value); 5338 } 5339 5340 void java_lang_reflect_RecordComponent::set_accessor(oop element, oop value) { 5341 element->obj_field_put(_accessor_offset, value); 5342 } 5343 5344 void java_lang_reflect_RecordComponent::set_signature(oop element, oop value) { 5345 element->obj_field_put(_signature_offset, value); 5346 } 5347 5348 void java_lang_reflect_RecordComponent::set_annotations(oop element, oop value) { 5349 element->obj_field_put(_annotations_offset, value); 5350 } 5351 5352 void java_lang_reflect_RecordComponent::set_typeAnnotations(oop element, oop value) { 5353 element->obj_field_put(_typeAnnotations_offset, value); 5354 } 5355 5356 // java_lang_InternalError 5357 int java_lang_InternalError::_during_unsafe_access_offset; 5358 5359 void java_lang_InternalError::set_during_unsafe_access(oop internal_error) { 5360 internal_error->bool_field_put(_during_unsafe_access_offset, true); 5361 } 5362 5363 jboolean java_lang_InternalError::during_unsafe_access(oop internal_error) { 5364 return internal_error->bool_field(_during_unsafe_access_offset); 5365 } 5366 5367 void java_lang_InternalError::compute_offsets() { 5368 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET); 5369 } 5370 5371 #if INCLUDE_CDS 5372 void java_lang_InternalError::serialize_offsets(SerializeClosure* f) { 5373 INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET); 5374 } 5375 #endif 5376 5377 #define BASIC_JAVA_CLASSES_DO_PART1(f) \ 5378 f(java_lang_Class) \ 5379 f(java_lang_String) \ 5380 f(java_lang_ref_Reference) \ 5381 //end 5382 5383 #define BASIC_JAVA_CLASSES_DO_PART2(f) \ 5384 f(java_lang_System) \ 5385 f(java_lang_ClassLoader) \ 5386 f(java_lang_Throwable) \ 5387 f(java_lang_Thread) \ 5388 f(java_lang_Thread_FieldHolder) \ 5389 f(java_lang_Thread_Constants) \ 5390 f(java_lang_ThreadGroup) \ 5391 f(java_lang_VirtualThread) \ 5392 f(java_lang_InternalError) \ 5393 f(java_lang_AssertionStatusDirectives) \ 5394 f(java_lang_ref_SoftReference) \ 5395 f(java_lang_invoke_MethodHandle) \ 5396 f(java_lang_invoke_DirectMethodHandle) \ 5397 f(java_lang_invoke_MemberName) \ 5398 f(java_lang_invoke_ResolvedMethodName) \ 5399 f(java_lang_invoke_LambdaForm) \ 5400 f(java_lang_invoke_MethodType) \ 5401 f(java_lang_invoke_CallSite) \ 5402 f(java_lang_invoke_ConstantCallSite) \ 5403 f(java_lang_invoke_MethodHandleNatives_CallSiteContext) \ 5404 f(java_lang_reflect_AccessibleObject) \ 5405 f(java_lang_reflect_Method) \ 5406 f(java_lang_reflect_Constructor) \ 5407 f(java_lang_reflect_Field) \ 5408 f(java_lang_reflect_RecordComponent) \ 5409 f(reflect_ConstantPool) \ 5410 f(java_lang_reflect_Parameter) \ 5411 f(java_lang_Module) \ 5412 f(java_lang_StackTraceElement) \ 5413 f(java_lang_ClassFrameInfo) \ 5414 f(java_lang_StackFrameInfo) \ 5415 f(java_lang_LiveStackFrameInfo) \ 5416 f(jdk_internal_vm_ContinuationScope) \ 5417 f(jdk_internal_vm_Continuation) \ 5418 f(jdk_internal_vm_StackChunk) \ 5419 f(java_util_concurrent_locks_AbstractOwnableSynchronizer) \ 5420 f(jdk_internal_foreign_abi_NativeEntryPoint) \ 5421 f(jdk_internal_foreign_abi_ABIDescriptor) \ 5422 f(jdk_internal_foreign_abi_VMStorage) \ 5423 f(jdk_internal_foreign_abi_CallConv) \ 5424 f(jdk_internal_misc_UnsafeConstants) \ 5425 f(java_lang_boxing_object) \ 5426 f(vector_VectorPayload) \ 5427 //end 5428 5429 #define BASIC_JAVA_CLASSES_DO(f) \ 5430 BASIC_JAVA_CLASSES_DO_PART1(f) \ 5431 BASIC_JAVA_CLASSES_DO_PART2(f) 5432 5433 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets(); 5434 5435 // Compute field offsets of all the classes in this file 5436 void JavaClasses::compute_offsets() { 5437 if (CDSConfig::is_using_archive()) { 5438 JVMTI_ONLY(assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() && 5439 JvmtiExport::has_early_class_hook_env()), 5440 "JavaClasses::compute_offsets() must be called in early JVMTI phase.")); 5441 // None of the classes used by the rest of this function can be replaced by 5442 // JVMTI ClassFileLoadHook. 5443 // We are safe to use the archived offsets, which have already been restored 5444 // by JavaClasses::serialize_offsets, without computing the offsets again. 5445 return; 5446 } 5447 5448 // We have already called the compute_offsets() of the 5449 // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String, java_lang_Class and 5450 // java_lang_ref_Reference) earlier inside vmClasses::resolve_all() 5451 BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS); 5452 } 5453 5454 #if INCLUDE_CDS 5455 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc); 5456 5457 void JavaClasses::serialize_offsets(SerializeClosure* soc) { 5458 BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS); 5459 } 5460 #endif 5461 5462 #if INCLUDE_CDS_JAVA_HEAP 5463 bool JavaClasses::is_supported_for_archiving(oop obj) { 5464 Klass* klass = obj->klass(); 5465 5466 if (!CDSConfig::is_dumping_invokedynamic()) { 5467 // These are supported by CDS only when CDSConfig::is_dumping_invokedynamic() is enabled. 5468 if (klass == vmClasses::ResolvedMethodName_klass() || 5469 klass == vmClasses::MemberName_klass() || 5470 klass == vmClasses::Context_klass()) { 5471 return false; 5472 } 5473 } 5474 5475 if (klass->is_subclass_of(vmClasses::Reference_klass())) { 5476 // It's problematic to archive Reference objects. One of the reasons is that 5477 // Reference::discovered may pull in unwanted objects (see JDK-8284336) 5478 return false; 5479 } 5480 5481 return true; 5482 } 5483 #endif 5484 5485 #ifndef PRODUCT 5486 5487 // These functions exist to assert the validity of de-serialized offsets in boxing object as a sanity check. 5488 5489 bool JavaClasses::check_offset(const char *klass_name, int deserialized_offset, const char *field_name, 5490 const char* field_sig) { 5491 EXCEPTION_MARK; 5492 fieldDescriptor fd; 5493 TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name); 5494 Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH); 5495 InstanceKlass* ik = InstanceKlass::cast(k); 5496 TempNewSymbol f_name = SymbolTable::new_symbol(field_name); 5497 TempNewSymbol f_sig = SymbolTable::new_symbol(field_sig); 5498 if (!ik->find_local_field(f_name, f_sig, &fd)) { 5499 tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name); 5500 return false; 5501 } 5502 if (fd.is_static()) { 5503 tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name); 5504 return false; 5505 } 5506 if (fd.offset() == deserialized_offset ) { 5507 return true; 5508 } else { 5509 tty->print_cr("Offset of nonstatic field %s.%s is deserialized as %d but should really be %d.", 5510 klass_name, field_name, deserialized_offset, fd.offset()); 5511 return false; 5512 } 5513 } 5514 5515 void JavaClasses::check_offsets() { 5516 bool valid = true; 5517 5518 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 5519 valid &= check_offset(klass_name, cpp_klass_name :: _##field_name ## _offset, #field_name, field_sig) 5520 5521 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \ 5522 valid &= check_offset(klass_name, cpp_klass_name :: _##long_ ## field_name ## _offset, #field_name, field_sig) 5523 5524 // Boxed primitive objects (java_lang_boxing_object) 5525 5526 CHECK_OFFSET("java/lang/Boolean", java_lang_boxing_object, value, "Z"); 5527 CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C"); 5528 if (Arguments::enable_preview() && UseNullableValueFlattening && UseFieldFlattening) { 5529 CHECK_LONG_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 5530 } else { 5531 CHECK_OFFSET("java/lang/Float", java_lang_boxing_object, value, "F"); 5532 } 5533 CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D"); 5534 CHECK_OFFSET("java/lang/Byte", java_lang_boxing_object, value, "B"); 5535 CHECK_OFFSET("java/lang/Short", java_lang_boxing_object, value, "S"); 5536 if (Arguments::enable_preview() && UseNullableValueFlattening && UseFieldFlattening) { 5537 CHECK_LONG_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 5538 } else { 5539 CHECK_OFFSET("java/lang/Integer", java_lang_boxing_object, value, "I"); 5540 } 5541 CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J"); 5542 5543 if (!valid) vm_exit_during_initialization("Field offset verification failed"); 5544 } 5545 5546 #endif // PRODUCT 5547 5548 int InjectedField::compute_offset() { 5549 InstanceKlass* ik = InstanceKlass::cast(klass()); 5550 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 5551 if (!may_be_java && !fs.field_flags().is_injected()) { 5552 // Only look at injected fields 5553 continue; 5554 } 5555 if (fs.name() == name() && fs.signature() == signature()) { 5556 return fs.offset(); 5557 } 5558 } 5559 ResourceMark rm; 5560 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)" : ""); 5561 #ifndef PRODUCT 5562 ik->print(); 5563 tty->print_cr("all fields:"); 5564 for (AllFieldStream fs(ik); !fs.done(); fs.next()) { 5565 tty->print_cr(" name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_field_flags()); 5566 } 5567 #endif //PRODUCT 5568 vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class"); 5569 return -1; 5570 } 5571 5572 void javaClasses_init() { 5573 JavaClasses::compute_offsets(); 5574 JavaClasses::check_offsets(); 5575 FilteredFieldsMap::initialize(); // must be done after computing offsets. 5576 } --- EOF ---