1 /*
   2  * Copyright (c) 1997, 2025, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "cds/aotMetaspace.hpp"
  26 #include "cds/aotReferenceObjSupport.hpp"
  27 #include "cds/archiveBuilder.hpp"
  28 #include "cds/archiveHeapLoader.hpp"
  29 #include "cds/cdsConfig.hpp"
  30 #include "cds/heapShared.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.inline.hpp"
  61 #include "oops/method.inline.hpp"
  62 #include "oops/objArrayKlass.hpp"
  63 #include "oops/objArrayOop.inline.hpp"
  64 #include "oops/oop.inline.hpp"
  65 #include "oops/oopCast.inline.hpp"
  66 #include "oops/recordComponent.hpp"
  67 #include "oops/symbol.hpp"
  68 #include "oops/typeArrayOop.inline.hpp"
  69 #include "prims/jvmtiExport.hpp"
  70 #include "prims/methodHandles.hpp"
  71 #include "prims/resolvedMethodTable.hpp"
  72 #include "runtime/continuationEntry.inline.hpp"
  73 #include "runtime/continuationJavaClasses.inline.hpp"
  74 #include "runtime/fieldDescriptor.inline.hpp"
  75 #include "runtime/frame.inline.hpp"
  76 #include "runtime/handles.inline.hpp"
  77 #include "runtime/handshake.hpp"
  78 #include "runtime/init.hpp"
  79 #include "runtime/interfaceSupport.inline.hpp"
  80 #include "runtime/java.hpp"
  81 #include "runtime/javaCalls.hpp"
  82 #include "runtime/javaThread.hpp"
  83 #include "runtime/jniHandles.inline.hpp"
  84 #include "runtime/reflection.hpp"
  85 #include "runtime/safepoint.hpp"
  86 #include "runtime/safepointVerifiers.hpp"
  87 #include "runtime/threadSMR.hpp"
  88 #include "runtime/vframe.inline.hpp"
  89 #include "runtime/vm_version.hpp"
  90 #include "utilities/align.hpp"
  91 #include "utilities/globalDefinitions.hpp"
  92 #include "utilities/growableArray.hpp"
  93 #include "utilities/preserveException.hpp"
  94 #include "utilities/utf8.hpp"
  95 #if INCLUDE_JVMCI
  96 #include "jvmci/jvmciJavaClasses.hpp"
  97 #endif
  98 
  99 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java)           \
 100   { VM_CLASS_ID(klass), VM_SYMBOL_ENUM_NAME(name##_name), VM_SYMBOL_ENUM_NAME(signature), may_be_java },
 101 
 102 InjectedField JavaClasses::_injected_fields[] = {
 103   ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
 104 };
 105 
 106 // Register native methods of Object
 107 void java_lang_Object::register_natives(TRAPS) {
 108   InstanceKlass* obj = vmClasses::Object_klass();
 109   Method::register_native(obj, vmSymbols::hashCode_name(),
 110                           vmSymbols::void_int_signature(), (address) &JVM_IHashCode, CHECK);
 111   Method::register_native(obj, vmSymbols::wait_name(),
 112                           vmSymbols::long_void_signature(), (address) &JVM_MonitorWait, CHECK);
 113   Method::register_native(obj, vmSymbols::notify_name(),
 114                           vmSymbols::void_method_signature(), (address) &JVM_MonitorNotify, CHECK);
 115   Method::register_native(obj, vmSymbols::notifyAll_name(),
 116                           vmSymbols::void_method_signature(), (address) &JVM_MonitorNotifyAll, CHECK);
 117   Method::register_native(obj, vmSymbols::clone_name(),
 118                           vmSymbols::void_object_signature(), (address) &JVM_Clone, THREAD);
 119 }
 120 
 121 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
 122   return _injected_fields[(int)id].compute_offset();
 123 }
 124 
 125 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
 126   *field_count = 0;
 127 
 128   vmSymbolID sid = vmSymbols::find_sid(class_name);
 129   if (sid == vmSymbolID::NO_SID) {
 130     // Only well known classes can inject fields
 131     return nullptr;
 132   }
 133 
 134   int count = 0;
 135   int start = -1;
 136 
 137 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
 138   if (sid == VM_SYMBOL_ENUM_NAME(klass)) {                         \
 139     count++;                                                       \
 140     if (start == -1) {                                             \
 141       start = (int)InjectedFieldID::klass##_##name##_enum;         \
 142     }                                                              \
 143   }
 144   ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
 145 #undef LOOKUP_INJECTED_FIELD
 146 
 147   if (start != -1) {
 148     *field_count = count;
 149     return _injected_fields + start;
 150   }
 151   return nullptr;
 152 }
 153 
 154 
 155 // Helpful routine for computing field offsets at run time rather than hardcoding them
 156 // Finds local fields only, including static fields.  Static field offsets are from the
 157 // beginning of the mirror.
 158 void JavaClasses::compute_offset(int &dest_offset,
 159                                  InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
 160                                  bool is_static) {
 161   fieldDescriptor fd;
 162   if (ik == nullptr) {
 163     ResourceMark rm;
 164     log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string());
 165     vm_exit_during_initialization("Invalid layout of well-known class");
 166   }
 167 
 168   if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) {
 169     ResourceMark rm;
 170     log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(),
 171                      name_symbol->as_C_string(), signature_symbol->as_C_string());
 172 #ifndef PRODUCT
 173     // Prints all fields and offsets
 174     Log(class) lt;
 175     LogStream ls(lt.error());
 176     ik->print_on(&ls);
 177 #endif //PRODUCT
 178     vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
 179   }
 180   dest_offset = fd.offset();
 181 }
 182 
 183 // Overloading to pass name as a string.
 184 void JavaClasses::compute_offset(int& dest_offset, InstanceKlass* ik,
 185                                  const char* name_string, Symbol* signature_symbol,
 186                                  bool is_static) {
 187   TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string));
 188   if (name == nullptr) {
 189     ResourceMark rm;
 190     log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string);
 191     vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name());
 192   }
 193   compute_offset(dest_offset, ik, name, signature_symbol, is_static);
 194 }
 195 
 196 // java_lang_String
 197 
 198 int java_lang_String::_value_offset;
 199 int java_lang_String::_hash_offset;
 200 int java_lang_String::_hashIsZero_offset;
 201 int java_lang_String::_coder_offset;
 202 int java_lang_String::_flags_offset;
 203 
 204 bool java_lang_String::_initialized;
 205 
 206 
 207 bool java_lang_String::test_and_set_flag(oop java_string, uint8_t flag_mask) {
 208   uint8_t* addr = flags_addr(java_string);
 209   uint8_t value = AtomicAccess::load(addr);
 210   while ((value & flag_mask) == 0) {
 211     uint8_t old_value = value;
 212     value |= flag_mask;
 213     value = AtomicAccess::cmpxchg(addr, old_value, value);
 214     if (value == old_value) return false; // Flag bit changed from 0 to 1.
 215   }
 216   return true;                  // Flag bit is already 1.
 217 }
 218 
 219 #define STRING_FIELDS_DO(macro) \
 220   macro(_value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \
 221   macro(_hash_offset,  k, "hash",                  int_signature,        false); \
 222   macro(_hashIsZero_offset, k, "hashIsZero",       bool_signature,       false); \
 223   macro(_coder_offset, k, "coder",                 byte_signature,       false);
 224 
 225 void java_lang_String::compute_offsets() {
 226   if (_initialized) {
 227     return;
 228   }
 229 
 230   InstanceKlass* k = vmClasses::String_klass();
 231   STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
 232   STRING_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
 233 
 234   _initialized = true;
 235 }
 236 
 237 #if INCLUDE_CDS
 238 void java_lang_String::serialize_offsets(SerializeClosure* f) {
 239   STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
 240   STRING_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
 241   f->do_bool(&_initialized);
 242 }
 243 #endif
 244 
 245 class CompactStringsFixup : public FieldClosure {
 246 private:
 247   bool _value;
 248 
 249 public:
 250   CompactStringsFixup(bool value) : _value(value) {}
 251 
 252   void do_field(fieldDescriptor* fd) {
 253     if (fd->name() == vmSymbols::compact_strings_name()) {
 254       oop mirror = fd->field_holder()->java_mirror();
 255       assert(fd->field_holder() == vmClasses::String_klass(), "Should be String");
 256       assert(mirror != nullptr, "String must have mirror already");
 257       mirror->bool_field_put(fd->offset(), _value);
 258     }
 259   }
 260 };
 261 
 262 void java_lang_String::set_compact_strings(bool value) {
 263   CompactStringsFixup fix(value);
 264   vmClasses::String_klass()->do_local_static_fields(&fix);
 265 }
 266 
 267 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
 268   assert(_initialized, "Must be initialized");
 269   assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
 270 
 271   // Create the String object first, so there's a chance that the String
 272   // and the char array it points to end up in the same cache line.
 273   oop obj;
 274   obj = vmClasses::String_klass()->allocate_instance(CHECK_NH);
 275 
 276   // Create the char array.  The String object must be handlized here
 277   // because GC can happen as a result of the allocation attempt.
 278   Handle h_obj(THREAD, obj);
 279   int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
 280   typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
 281 
 282   // Point the String at the char array
 283   obj = h_obj();
 284   set_value(obj, buffer);
 285   // No need to zero the offset, allocation zero'ed the entire String object
 286   set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
 287   return h_obj;
 288 }
 289 
 290 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) {
 291   bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
 292   Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
 293   typeArrayOop buffer = value(h_obj());
 294   assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
 295   if (is_latin1) {
 296     for (int index = 0; index < length; index++) {
 297       buffer->byte_at_put(index, (jbyte)unicode[index]);
 298     }
 299   } else {
 300     for (int index = 0; index < length; index++) {
 301       buffer->char_at_put(index, unicode[index]);
 302     }
 303   }
 304 
 305 #ifdef ASSERT
 306   {
 307     ResourceMark rm;
 308     size_t utf8_len = static_cast<size_t>(length);
 309     char* expected = UNICODE::as_utf8(unicode, utf8_len);
 310     char* actual = as_utf8_string(h_obj());
 311     if (strcmp(expected, actual) != 0) {
 312       fatal("Unicode conversion failure: %s --> %s", expected, actual);
 313     }
 314   }
 315 #endif
 316 
 317   return h_obj;
 318 }
 319 
 320 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) {
 321   Handle h_obj = create_from_unicode(unicode, length, CHECK_NULL);
 322   return h_obj();
 323 }
 324 
 325 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
 326   if (utf8_str == nullptr) {
 327     return Handle();
 328   }
 329   bool has_multibyte, is_latin1;
 330   int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
 331   if (!CompactStrings) {
 332     has_multibyte = true;
 333     is_latin1 = false;
 334   }
 335 
 336   Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
 337   if (length > 0) {
 338     if (!has_multibyte) {
 339       const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
 340       ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
 341     } else if (is_latin1) {
 342       UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
 343     } else {
 344       UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
 345     }
 346   }
 347 
 348 #ifdef ASSERT
 349   // This check is too strict when the input string is not a valid UTF8.
 350   // For example, it may be created with arbitrary content via jni_NewStringUTF.
 351   if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, strlen(utf8_str), /*version_leq_47*/false)) {
 352     ResourceMark rm;
 353     const char* expected = utf8_str;
 354     char* actual = as_utf8_string(h_obj());
 355     if (strcmp(expected, actual) != 0) {
 356       fatal("String conversion failure: %s --> %s", expected, actual);
 357     }
 358   }
 359 #endif
 360 
 361   return h_obj;
 362 }
 363 
 364 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
 365   Handle h_obj = create_from_str(utf8_str, CHECK_NULL);
 366   return h_obj();
 367 }
 368 
 369 Handle java_lang_String::create_from_symbol(const Symbol* symbol, TRAPS) {
 370   const char* utf8_str = (char*)symbol->bytes();
 371   int utf8_len = symbol->utf8_length();
 372 
 373   bool has_multibyte, is_latin1;
 374   int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
 375   if (!CompactStrings) {
 376     has_multibyte = true;
 377     is_latin1 = false;
 378   }
 379 
 380   Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
 381   if (length > 0) {
 382     if (!has_multibyte) {
 383       const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
 384       ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
 385     } else if (is_latin1) {
 386       UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
 387     } else {
 388       UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
 389     }
 390   }
 391 
 392 #ifdef ASSERT
 393   // This check is too strict on older classfile versions
 394   if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, utf8_len, /*version_leq_47*/false))
 395   {
 396     ResourceMark rm;
 397     const char* expected = symbol->as_utf8();
 398     char* actual = as_utf8_string(h_obj());
 399     if (strncmp(expected, actual, utf8_len) != 0) {
 400       fatal("Symbol conversion failure: %s --> %s", expected, actual);
 401     }
 402   }
 403 #endif
 404 
 405   return h_obj;
 406 }
 407 
 408 // Converts a C string to a Java String based on current encoding
 409 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
 410   assert(str != nullptr, "bad arguments");
 411 
 412   typedef jstring (JNICALL *to_java_string_fn_t)(JNIEnv*, const char *);
 413   static to_java_string_fn_t _to_java_string_fn = nullptr;
 414 
 415   if (_to_java_string_fn == nullptr) {
 416     void *lib_handle = os::native_java_library();
 417     _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "JNU_NewStringPlatform"));
 418     if (_to_java_string_fn == nullptr) {
 419       fatal("JNU_NewStringPlatform missing");
 420     }
 421   }
 422 
 423   jstring js = nullptr;
 424   {
 425     JavaThread* thread = THREAD;
 426     HandleMark hm(thread);
 427     ThreadToNativeFromVM ttn(thread);
 428     js = (_to_java_string_fn)(thread->jni_environment(), str);
 429   }
 430 
 431   Handle native_platform_string(THREAD, JNIHandles::resolve(js));
 432   JNIHandles::destroy_local(js);  // destroy local JNIHandle.
 433   return native_platform_string;
 434 }
 435 
 436 // Converts a Java String to a native C string that can be used for
 437 // native OS calls.
 438 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
 439   typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
 440   static to_platform_string_fn_t _to_platform_string_fn = nullptr;
 441 
 442   if (_to_platform_string_fn == nullptr) {
 443     void *lib_handle = os::native_java_library();
 444     _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
 445     if (_to_platform_string_fn == nullptr) {
 446       fatal("GetStringPlatformChars missing");
 447     }
 448   }
 449 
 450   char *native_platform_string;
 451   jstring js;
 452   { JavaThread* thread = THREAD;
 453     js = (jstring) JNIHandles::make_local(thread, java_string());
 454     HandleMark hm(thread);
 455     ThreadToNativeFromVM ttn(thread);
 456     JNIEnv *env = thread->jni_environment();
 457     bool is_copy;
 458     native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
 459     assert(is_copy == JNI_TRUE, "is_copy value changed");
 460   }
 461 
 462   // Uses a store barrier and therefore needs to be in vm state
 463   JNIHandles::destroy_local(js);
 464 
 465   return native_platform_string;
 466 }
 467 
 468 Handle java_lang_String::externalize_classname(Symbol* java_name, TRAPS) {
 469   ResourceMark rm(THREAD);
 470   return create_from_str(java_name->as_klass_external_name(), THREAD);
 471 }
 472 
 473 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
 474   jchar* result = as_unicode_string_or_null(java_string, length);
 475   if (result == nullptr) {
 476     THROW_MSG_NULL(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
 477   }
 478   return result;
 479 }
 480 
 481 jchar* java_lang_String::as_unicode_string_or_null(oop java_string, int& length) {
 482   typeArrayOop value  = java_lang_String::value(java_string);
 483                length = java_lang_String::length(java_string, value);
 484   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 485 
 486   jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
 487   if (result != nullptr) {
 488     if (!is_latin1) {
 489       for (int index = 0; index < length; index++) {
 490         result[index] = value->char_at(index);
 491       }
 492     } else {
 493       for (int index = 0; index < length; index++) {
 494         result[index] = ((jchar) value->byte_at(index)) & 0xff;
 495       }
 496     }
 497   }
 498   return result;
 499 }
 500 
 501 inline unsigned int java_lang_String::hash_code_impl(oop java_string, bool update) {
 502   // The hash and hashIsZero fields are subject to a benign data race,
 503   // making it crucial to ensure that any observable result of the
 504   // calculation in this method stays correct under any possible read of
 505   // these fields. Necessary restrictions to allow this to be correct
 506   // without explicit memory fences or similar concurrency primitives is
 507   // that we can ever only write to one of these two fields for a given
 508   // String instance, and that the computation is idempotent and derived
 509   // from immutable state
 510   assert(_initialized && (_hash_offset > 0) && (_hashIsZero_offset > 0), "Must be initialized");
 511   if (java_lang_String::hash_is_set(java_string)) {
 512     return java_string->int_field(_hash_offset);
 513   }
 514 
 515   typeArrayOop value = java_lang_String::value(java_string);
 516   int         length = java_lang_String::length(java_string, value);
 517   bool     is_latin1 = java_lang_String::is_latin1(java_string);
 518 
 519   unsigned int hash = 0;
 520   if (length > 0) {
 521     if (is_latin1) {
 522       hash = java_lang_String::hash_code(value->byte_at_addr(0), length);
 523     } else {
 524       hash = java_lang_String::hash_code(value->char_at_addr(0), length);
 525     }
 526   }
 527 
 528   if (update) {
 529     if (hash != 0) {
 530       java_string->int_field_put(_hash_offset, hash);
 531     } else {
 532       java_string->bool_field_put(_hashIsZero_offset, true);
 533     }
 534   }
 535   return hash;
 536 }
 537 
 538 unsigned int java_lang_String::hash_code(oop java_string) {
 539   return hash_code_impl(java_string, /*update=*/true);
 540 }
 541 
 542 unsigned int java_lang_String::hash_code_noupdate(oop java_string) {
 543   return hash_code_impl(java_string, /*update=*/false);
 544 }
 545 
 546 
 547 char* java_lang_String::as_quoted_ascii(oop java_string) {
 548   typeArrayOop value  = java_lang_String::value(java_string);
 549   int          length = java_lang_String::length(java_string, value);
 550   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 551 
 552   if (length == 0) return nullptr;
 553 
 554   char* result;
 555   size_t result_length;
 556   if (!is_latin1) {
 557     jchar* base = value->char_at_addr(0);
 558     result_length = UNICODE::quoted_ascii_length(base, length) + 1;
 559     result = NEW_RESOURCE_ARRAY(char, result_length);
 560     UNICODE::as_quoted_ascii(base, length, result, result_length);
 561   } else {
 562     jbyte* base = value->byte_at_addr(0);
 563     result_length = UNICODE::quoted_ascii_length(base, length) + 1;
 564     result = NEW_RESOURCE_ARRAY(char, result_length);
 565     UNICODE::as_quoted_ascii(base, length, result, result_length);
 566   }
 567   assert(result_length >= (size_t)length + 1, "must not be shorter");
 568   assert(result_length == strlen(result) + 1, "must match");
 569   return result;
 570 }
 571 
 572 Symbol* java_lang_String::as_symbol(oop java_string) {
 573   typeArrayOop value  = java_lang_String::value(java_string);
 574   int          length = java_lang_String::length(java_string, value);
 575   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 576   if (!is_latin1) {
 577     jchar* base = (length == 0) ? nullptr : value->char_at_addr(0);
 578     Symbol* sym = SymbolTable::new_symbol(base, length);
 579     return sym;
 580   } else {
 581     ResourceMark rm;
 582     jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
 583     size_t utf8_len = static_cast<size_t>(length);
 584     const char* base = UNICODE::as_utf8(position, utf8_len);
 585     Symbol* sym = SymbolTable::new_symbol(base, checked_cast<int>(utf8_len));
 586     return sym;
 587   }
 588 }
 589 
 590 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
 591   typeArrayOop value  = java_lang_String::value(java_string);
 592   int          length = java_lang_String::length(java_string, value);
 593   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 594   if (!is_latin1) {
 595     jchar* base = (length == 0) ? nullptr : value->char_at_addr(0);
 596     return SymbolTable::probe_unicode(base, length);
 597   } else {
 598     ResourceMark rm;
 599     jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
 600     size_t utf8_len = static_cast<size_t>(length);
 601     const char* base = UNICODE::as_utf8(position, utf8_len);
 602     return SymbolTable::probe(base, checked_cast<int>(utf8_len));
 603   }
 604 }
 605 
 606 size_t java_lang_String::utf8_length(oop java_string, typeArrayOop value) {
 607   assert(value_equals(value, java_lang_String::value(java_string)),
 608          "value must be same as java_lang_String::value(java_string)");
 609   int length = java_lang_String::length(java_string, value);
 610   if (length == 0) {
 611     return 0;
 612   }
 613   if (!java_lang_String::is_latin1(java_string)) {
 614     return UNICODE::utf8_length(value->char_at_addr(0), length);
 615   } else {
 616     return UNICODE::utf8_length(value->byte_at_addr(0), length);
 617   }
 618 }
 619 
 620 size_t java_lang_String::utf8_length(oop java_string) {
 621   typeArrayOop value = java_lang_String::value(java_string);
 622   return utf8_length(java_string, value);
 623 }
 624 
 625 int java_lang_String::utf8_length_as_int(oop java_string) {
 626   typeArrayOop value = java_lang_String::value(java_string);
 627   return utf8_length_as_int(java_string, value);
 628 }
 629 
 630 int java_lang_String::utf8_length_as_int(oop java_string, typeArrayOop value) {
 631   assert(value_equals(value, java_lang_String::value(java_string)),
 632          "value must be same as java_lang_String::value(java_string)");
 633   int length = java_lang_String::length(java_string, value);
 634   if (length == 0) {
 635     return 0;
 636   }
 637   if (!java_lang_String::is_latin1(java_string)) {
 638     return UNICODE::utf8_length_as_int(value->char_at_addr(0), length);
 639   } else {
 640     return UNICODE::utf8_length_as_int(value->byte_at_addr(0), length);
 641   }
 642 }
 643 
 644 char* java_lang_String::as_utf8_string(oop java_string) {
 645   size_t length;
 646   return as_utf8_string(java_string, length);
 647 }
 648 
 649 char* java_lang_String::as_utf8_string(oop java_string, size_t& length) {
 650   typeArrayOop value = java_lang_String::value(java_string);
 651   // `length` is used as the incoming number of characters to
 652   // convert, and then set as the number of bytes in the UTF8 sequence.
 653   length             = java_lang_String::length(java_string, value);
 654   bool     is_latin1 = java_lang_String::is_latin1(java_string);
 655   if (!is_latin1) {
 656     jchar* position = (length == 0) ? nullptr : value->char_at_addr(0);
 657     return UNICODE::as_utf8(position, length);
 658   } else {
 659     jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
 660     return UNICODE::as_utf8(position, length);
 661   }
 662 }
 663 
 664 // Uses a provided buffer if it's sufficiently large, otherwise allocates
 665 // a resource array to fit
 666 char* java_lang_String::as_utf8_string_full(oop java_string, char* buf, size_t buflen, size_t& utf8_len) {
 667   typeArrayOop value = java_lang_String::value(java_string);
 668   int            len = java_lang_String::length(java_string, value);
 669   bool     is_latin1 = java_lang_String::is_latin1(java_string);
 670   if (!is_latin1) {
 671     jchar *position = (len == 0) ? nullptr : value->char_at_addr(0);
 672     utf8_len = UNICODE::utf8_length(position, len);
 673     if (utf8_len >= buflen) {
 674       buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
 675     }
 676     return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
 677   } else {
 678     jbyte *position = (len == 0) ? nullptr : value->byte_at_addr(0);
 679     utf8_len = UNICODE::utf8_length(position, len);
 680     if (utf8_len >= buflen) {
 681       buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
 682     }
 683     return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
 684   }
 685 }
 686 
 687 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, size_t buflen) {
 688   assert(value_equals(value, java_lang_String::value(java_string)),
 689          "value must be same as java_lang_String::value(java_string)");
 690   int     length = java_lang_String::length(java_string, value);
 691   bool is_latin1 = java_lang_String::is_latin1(java_string);
 692   if (!is_latin1) {
 693     jchar* position = (length == 0) ? nullptr : value->char_at_addr(0);
 694     return UNICODE::as_utf8(position, length, buf, buflen);
 695   } else {
 696     jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
 697     return UNICODE::as_utf8(position, length, buf, buflen);
 698   }
 699 }
 700 
 701 char* java_lang_String::as_utf8_string(oop java_string, char* buf, size_t buflen) {
 702   typeArrayOop value = java_lang_String::value(java_string);
 703   return as_utf8_string(java_string, value, buf, buflen);
 704 }
 705 
 706 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
 707   // `length` is used as the incoming number of characters to
 708   // convert, and then set as the number of bytes in the UTF8 sequence.
 709   size_t  length = static_cast<size_t>(len);
 710   typeArrayOop value  = java_lang_String::value(java_string);
 711   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 712   assert(start + len <= java_lang_String::length(java_string), "just checking");
 713   if (!is_latin1) {
 714     jchar* position = value->char_at_addr(start);
 715     return UNICODE::as_utf8(position, length);
 716   } else {
 717     jbyte* position = value->byte_at_addr(start);
 718     return UNICODE::as_utf8(position, length);
 719   }
 720 }
 721 
 722 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, size_t buflen) {
 723   assert(value_equals(value, java_lang_String::value(java_string)),
 724          "value must be same as java_lang_String::value(java_string)");
 725   assert(start + len <= java_lang_String::length(java_string), "just checking");
 726   bool is_latin1 = java_lang_String::is_latin1(java_string);
 727   if (!is_latin1) {
 728     jchar* position = value->char_at_addr(start);
 729     return UNICODE::as_utf8(position, len, buf, buflen);
 730   } else {
 731     jbyte* position = value->byte_at_addr(start);
 732     return UNICODE::as_utf8(position, len, buf, buflen);
 733   }
 734 }
 735 
 736 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) {
 737   assert(java_string->klass() == vmClasses::String_klass(),
 738          "must be java_string");
 739   typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
 740   int length = java_lang_String::length(java_string, value);
 741   if (length != len) {
 742     return false;
 743   }
 744   bool is_latin1 = java_lang_String::is_latin1(java_string);
 745   if (!is_latin1) {
 746     for (int i = 0; i < len; i++) {
 747       if (value->char_at(i) != chars[i]) {
 748         return false;
 749       }
 750     }
 751   } else {
 752     for (int i = 0; i < len; i++) {
 753       if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
 754         return false;
 755       }
 756     }
 757   }
 758   return true;
 759 }
 760 
 761 bool java_lang_String::equals(oop java_string, const char* utf8_string, size_t utf8_len) {
 762   assert(java_string->klass() == vmClasses::String_klass(),
 763          "must be java_string");
 764   typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
 765   int length = java_lang_String::length(java_string, value);
 766   int unicode_length = UTF8::unicode_length(utf8_string, utf8_len);
 767   if (length != unicode_length) {
 768     return false;
 769   }
 770   bool is_latin1 = java_lang_String::is_latin1(java_string);
 771   jchar c;
 772   if (!is_latin1) {
 773     for (int i = 0; i < unicode_length; i++) {
 774       utf8_string = UTF8::next(utf8_string, &c);
 775       if (value->char_at(i) != c) {
 776         return false;
 777       }
 778     }
 779   } else {
 780     for (int i = 0; i < unicode_length; i++) {
 781       utf8_string = UTF8::next(utf8_string, &c);
 782       if ((((jchar) value->byte_at(i)) & 0xff) != c) {
 783         return false;
 784       }
 785     }
 786   }
 787   return true;
 788 }
 789 
 790 bool java_lang_String::equals(oop str1, oop str2) {
 791   assert(str1->klass() == vmClasses::String_klass(),
 792          "must be java String");
 793   assert(str2->klass() == vmClasses::String_klass(),
 794          "must be java String");
 795   typeArrayOop value1    = java_lang_String::value_no_keepalive(str1);
 796   bool         is_latin1 = java_lang_String::is_latin1(str1);
 797   typeArrayOop value2    = java_lang_String::value_no_keepalive(str2);
 798   bool         is_latin2 = java_lang_String::is_latin1(str2);
 799 
 800   if (is_latin1 != is_latin2) {
 801     // Strings with different coders are never equal.
 802     return false;
 803   }
 804   return value_equals(value1, value2);
 805 }
 806 
 807 // Print the given string to the given outputStream, limiting the output to
 808 // at most max_length of the string's characters. If the length exceeds the
 809 // limit we print an abridged version of the string with the "middle" elided
 810 // and replaced by " ... (N characters ommitted) ... ". If max_length is odd
 811 // it is treated as max_length-1.
 812 void java_lang_String::print(oop java_string, outputStream* st, int max_length) {
 813   assert(java_string->klass() == vmClasses::String_klass(), "must be java_string");
 814   // We need at least two characters to print A ... B
 815   assert(max_length > 1, "invalid max_length: %d", max_length);
 816 
 817   typeArrayOop value  = java_lang_String::value_no_keepalive(java_string);
 818 
 819   if (value == nullptr) {
 820     // This can happen if, e.g., printing a String
 821     // object before its initializer has been called
 822     st->print("nullptr");
 823     return;
 824   }
 825 
 826   int length = java_lang_String::length(java_string, value);
 827   bool is_latin1 = java_lang_String::is_latin1(java_string);
 828 
 829   bool abridge = length > max_length;
 830 
 831   st->print("\"");
 832   for (int index = 0; index < length; index++) {
 833     // If we need to abridge and we've printed half the allowed characters
 834     // then jump to the tail of the string.
 835     if (abridge && index >= max_length / 2) {
 836       st->print(" ... (%d characters ommitted) ... ", length - 2 * (max_length / 2));
 837       index = length - (max_length / 2);
 838       abridge = false; // only do this once
 839     }
 840     jchar c = (!is_latin1) ?  value->char_at(index) :
 841                              ((jchar) value->byte_at(index)) & 0xff;
 842     if (c < ' ') {
 843       st->print("\\x%02X", c); // print control characters e.g. \x0A
 844     } else {
 845       st->print("%c", c);
 846     }
 847   }
 848   st->print("\"");
 849 
 850   if (length > max_length) {
 851     st->print(" (abridged) ");
 852   }
 853 }
 854 
 855 // java_lang_Class
 856 
 857 int java_lang_Class::_klass_offset;
 858 int java_lang_Class::_array_klass_offset;
 859 int java_lang_Class::_oop_size_offset;
 860 int java_lang_Class::_static_oop_field_count_offset;
 861 int java_lang_Class::_class_loader_offset;
 862 int java_lang_Class::_module_offset;
 863 int java_lang_Class::_protection_domain_offset;
 864 int java_lang_Class::_component_mirror_offset;
 865 int java_lang_Class::_init_lock_offset;
 866 int java_lang_Class::_signers_offset;
 867 int java_lang_Class::_name_offset;
 868 int java_lang_Class::_source_file_offset;
 869 int java_lang_Class::_classData_offset;
 870 int java_lang_Class::_classRedefinedCount_offset;
 871 int java_lang_Class::_reflectionData_offset;
 872 int java_lang_Class::_modifiers_offset;
 873 int java_lang_Class::_is_primitive_offset;
 874 int java_lang_Class::_raw_access_flags_offset;
 875 
 876 bool java_lang_Class::_offsets_computed = false;
 877 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = nullptr;
 878 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = nullptr;
 879 
 880 #ifdef ASSERT
 881 inline static void assert_valid_static_string_field(fieldDescriptor* fd) {
 882   assert(fd->has_initial_value(), "caller should have checked this");
 883   assert(fd->field_type() == T_OBJECT, "caller should have checked this");
 884   assert(fd->signature() == vmSymbols::string_signature(), "just checking");
 885 }
 886 #endif
 887 
 888 static void initialize_static_string_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
 889   DEBUG_ONLY(assert_valid_static_string_field(fd);)
 890   oop string = fd->string_initial_value(CHECK);
 891   mirror()->obj_field_put(fd->offset(), string);
 892 }
 893 
 894 static void initialize_static_primitive_field(fieldDescriptor* fd, Handle mirror) {
 895   assert(fd->has_initial_value(), "caller should have checked this");
 896   BasicType t = fd->field_type();
 897   switch (t) {
 898   case T_BYTE:
 899     mirror()->byte_field_put(fd->offset(), (jbyte)(fd->int_initial_value()));
 900     break;
 901   case T_BOOLEAN:
 902     mirror()->bool_field_put(fd->offset(), (jboolean)(fd->int_initial_value()));
 903     break;
 904   case T_CHAR:
 905     mirror()->char_field_put(fd->offset(), (jchar)(fd->int_initial_value()));
 906     break;
 907   case T_SHORT:
 908     mirror()->short_field_put(fd->offset(), (jshort)(fd->int_initial_value()));
 909     break;
 910   case T_INT:
 911     mirror()->int_field_put(fd->offset(), fd->int_initial_value());
 912     break;
 913   case T_FLOAT:
 914     mirror()->float_field_put(fd->offset(), fd->float_initial_value());
 915     break;
 916   case T_DOUBLE:
 917     mirror()->double_field_put(fd->offset(), fd->double_initial_value());
 918     break;
 919   case T_LONG:
 920     mirror()->long_field_put(fd->offset(), fd->long_initial_value());
 921     break;
 922   default:
 923     // Illegal ConstantValue attribute in class file should have been
 924     // caught during classfile parsing.
 925     ShouldNotReachHere();
 926   }
 927 }
 928 
 929 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
 930   assert(mirror.not_null() && fd->is_static(), "just checking");
 931   if (fd->has_initial_value()) {
 932     if (fd->field_type() != T_OBJECT) {
 933       initialize_static_primitive_field(fd, mirror);
 934     } else {
 935       initialize_static_string_field(fd, mirror, CHECK);
 936     }
 937   }
 938 }
 939 
 940 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
 941   assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
 942 
 943   // If the offset was read from the shared archive, it was fixed up already
 944   if (!k->in_aot_cache()) {
 945     if (k->is_instance_klass()) {
 946       // During bootstrap, java.lang.Class wasn't loaded so static field
 947       // offsets were computed without the size added it.  Go back and
 948       // update all the static field offsets to included the size.
 949 
 950       // Unfortunately, the FieldInfo stream is encoded with UNSIGNED5 which doesn't allow
 951       // content updates. So the FieldInfo stream has to be decompressed into a temporary array,
 952       // static fields offsets are updated in this array before reencoding everything into
 953       // a new UNSIGNED5 stream, and substitute it to the old FieldInfo stream.
 954 
 955       int java_fields;
 956       int injected_fields;
 957       InstanceKlass* ik = InstanceKlass::cast(k);
 958       GrowableArray<FieldInfo>* fields =
 959         FieldInfoStream::create_FieldInfoArray(ik->fieldinfo_stream(),
 960                                                &java_fields, &injected_fields);
 961       for (int i = 0; i < fields->length(); i++) {
 962         FieldInfo* fi = fields->adr_at(i);
 963         if (fi->access_flags().is_static()) {
 964           fi->set_offset(fi->offset() + InstanceMirrorKlass::offset_of_static_fields());
 965         }
 966       }
 967       Array<u1>* old_stream = ik->fieldinfo_stream();
 968       assert(fields->length() == (java_fields + injected_fields), "Must be");
 969       Array<u1>* new_fis = FieldInfoStream::create_FieldInfoStream(fields, java_fields, injected_fields, k->class_loader_data(), CHECK);
 970       ik->set_fieldinfo_stream(new_fis);
 971       MetadataFactory::free_array<u1>(k->class_loader_data(), old_stream);
 972 
 973       Array<u1>* old_table = ik->fieldinfo_search_table();
 974       Array<u1>* search_table = FieldInfoStream::create_search_table(ik->constants(), new_fis, k->class_loader_data(), CHECK);
 975       ik->set_fieldinfo_search_table(search_table);
 976       MetadataFactory::free_array<u1>(k->class_loader_data(), old_table);
 977 
 978       DEBUG_ONLY(FieldInfoStream::validate_search_table(ik->constants(), new_fis, search_table));
 979     }
 980   }
 981 
 982   if (k->in_aot_cache() && k->has_archived_mirror_index()) {
 983     if (ArchiveHeapLoader::is_in_use()) {
 984       bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK);
 985       assert(present, "Missing archived mirror for %s", k->external_name());
 986       return;
 987     } else {
 988       k->clear_java_mirror_handle();
 989       k->clear_archived_mirror_index();
 990     }
 991   }
 992   create_mirror(k, Handle(), Handle(), Handle(), Handle(), CHECK);
 993 }
 994 
 995 void java_lang_Class::initialize_mirror_fields(InstanceKlass* ik,
 996                                                Handle mirror,
 997                                                Handle protection_domain,
 998                                                Handle classData,
 999                                                TRAPS) {
1000   // Allocate a simple java object for a lock.
1001   // This needs to be a java object because during class initialization
1002   // it can be held across a java call.
1003   typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
1004   set_init_lock(mirror(), r);
1005 
1006   // Set protection domain also
1007   set_protection_domain(mirror(), protection_domain());
1008 
1009   // Initialize static fields
1010   ik->do_local_static_fields(&initialize_static_field, mirror, CHECK);
1011 
1012  // Set classData
1013   set_class_data(mirror(), classData());
1014 }
1015 
1016 // Set the java.lang.Module module field in the java_lang_Class mirror
1017 void java_lang_Class::set_mirror_module_field(JavaThread* current, Klass* k, Handle mirror, Handle module) {
1018   if (CDSConfig::is_using_aot_linked_classes()) {
1019     oop archived_module = java_lang_Class::module(mirror());
1020     if (archived_module != nullptr) {
1021       precond(module() == nullptr || module() == archived_module);
1022       precond(AOTMetaspace::in_aot_cache_static_region((void*)k));
1023       return;
1024     }
1025   }
1026 
1027   if (module.is_null()) {
1028     // During startup, the module may be null only if java.base has not been defined yet.
1029     // Put the class on the fixup_module_list to patch later when the java.lang.Module
1030     // for java.base is known. But note that since we captured the null module another
1031     // thread may have completed that initialization.
1032 
1033     // With AOT-linked classes, java.base should have been defined before the
1034     // VM loads any classes.
1035     precond(!CDSConfig::is_using_aot_linked_classes());
1036 
1037     bool javabase_was_defined = false;
1038     {
1039       MutexLocker m1(current, Module_lock);
1040       // Keep list of classes needing java.base module fixup
1041       if (!ModuleEntryTable::javabase_defined()) {
1042         assert(k->java_mirror() != nullptr, "Class's mirror is null");
1043         k->class_loader_data()->inc_keep_alive_ref_count();
1044         assert(fixup_module_field_list() != nullptr, "fixup_module_field_list not initialized");
1045         fixup_module_field_list()->push(k);
1046       } else {
1047         javabase_was_defined = true;
1048       }
1049     }
1050 
1051     // If java.base was already defined then patch this particular class with java.base.
1052     if (javabase_was_defined) {
1053       ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
1054       assert(javabase_entry != nullptr && javabase_entry->module_oop() != nullptr,
1055              "Setting class module field, " JAVA_BASE_NAME " should be defined");
1056       Handle javabase_handle(current, javabase_entry->module_oop());
1057       set_module(mirror(), javabase_handle());
1058     }
1059   } else {
1060     assert(Universe::is_module_initialized() ||
1061            (ModuleEntryTable::javabase_defined() &&
1062             (module() == ModuleEntryTable::javabase_moduleEntry()->module_oop())),
1063            "Incorrect java.lang.Module specification while creating mirror");
1064     set_module(mirror(), module());
1065   }
1066 }
1067 
1068 // Statically allocate fixup lists because they always get created.
1069 void java_lang_Class::allocate_fixup_lists() {
1070   if (!CDSConfig::is_using_aot_linked_classes()) {
1071     // fixup_mirror_list() is not used when we have preloaded classes. See
1072     // Universe::fixup_mirrors().
1073     GrowableArray<Klass*>* mirror_list =
1074       new (mtClass) GrowableArray<Klass*>(40, mtClass);
1075     set_fixup_mirror_list(mirror_list);
1076 
1077     // With AOT-linked classes, java.base module is defined before any class
1078     // is loaded, so there's no need for fixup_module_field_list().
1079     GrowableArray<Klass*>* module_list =
1080       new (mtModule) GrowableArray<Klass*>(500, mtModule);
1081     set_fixup_module_field_list(module_list);
1082   }
1083 }
1084 
1085 void java_lang_Class::allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData,
1086                                       Handle& mirror, Handle& comp_mirror, TRAPS) {
1087   // Allocate mirror (java.lang.Class instance)
1088   oop mirror_oop = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(k, CHECK);
1089   mirror = Handle(THREAD, mirror_oop);
1090 
1091   // Setup indirection from mirror->klass
1092   set_klass(mirror(), k);
1093 
1094   // Set the modifiers flag.
1095   u2 computed_modifiers = k->compute_modifier_flags();
1096   set_modifiers(mirror(), computed_modifiers);
1097   // Set the raw access_flags, this is used by reflection instead of modifier flags.
1098   // The Java code for array classes gets the access flags from the element type.
1099   assert(!k->is_array_klass() || k->access_flags().as_unsigned_short() == 0, "access flags are not set for arrays");
1100   set_raw_access_flags(mirror(), k->access_flags().as_unsigned_short());
1101 
1102   InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
1103   assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
1104 
1105   set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
1106 
1107   // It might also have a component mirror.  This mirror must already exist.
1108   if (k->is_array_klass()) {
1109     if (k->is_flatArray_klass()) {
1110       Klass* element_klass = (Klass*) FlatArrayKlass::cast(k)->element_klass();
1111       assert(element_klass->is_inline_klass(), "Must be inline type component");
1112       if (is_scratch) {
1113         comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass));
1114       } else {
1115         comp_mirror = Handle(THREAD, element_klass->java_mirror());
1116       }
1117     } else if (k->is_typeArray_klass()) {
1118       BasicType type = TypeArrayKlass::cast(k)->element_type();
1119       if (is_scratch) {
1120         comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(type));
1121       } else {
1122         comp_mirror = Handle(THREAD, Universe::java_mirror(type));
1123       }
1124     } else {
1125       assert(k->is_objArray_klass(), "Must be");
1126       assert(!k->is_refArray_klass() || !k->is_flatArray_klass(), "Must not have mirror");
1127       Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1128       assert(element_klass != nullptr, "Must have an element klass");
1129       oop comp_oop = element_klass->java_mirror();
1130       if (is_scratch) {
1131         comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass));
1132       } else {
1133         comp_mirror = Handle(THREAD, comp_oop);
1134       }
1135     }
1136     assert(comp_mirror() != nullptr, "must have a mirror");
1137 
1138     // Two-way link between the array klass and its component mirror:
1139     // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
1140     set_component_mirror(mirror(), comp_mirror());
1141     // See below for ordering dependencies between field array_klass in component mirror
1142     // and java_mirror in this klass.
1143   } else {
1144     assert(k->is_instance_klass(), "Must be");
1145     initialize_mirror_fields(InstanceKlass::cast(k), mirror, protection_domain, classData, THREAD);
1146     if (HAS_PENDING_EXCEPTION) {
1147       // If any of the fields throws an exception like OOM remove the klass field
1148       // from the mirror so GC doesn't follow it after the klass has been deallocated.
1149       // This mirror looks like a primitive type, which logically it is because it
1150       // it represents no class.
1151       set_klass(mirror(), nullptr);
1152       return;
1153     }
1154   }
1155 }
1156 
1157 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
1158                                     Handle module, Handle protection_domain,
1159                                     Handle classData, TRAPS) {
1160   assert(k != nullptr, "Use create_basic_type_mirror for primitive types");
1161   assert(k->java_mirror() == nullptr, "should only assign mirror once");
1162   // Class_klass has to be loaded because it is used to allocate
1163   // the mirror.
1164   if (vmClasses::Class_klass_is_loaded()) {
1165 
1166     if (k->is_refined_objArray_klass()) {
1167       Klass* super_klass = k->super();
1168       assert(super_klass != nullptr, "Must be");
1169       Handle mirror(THREAD, super_klass->java_mirror());
1170       k->set_java_mirror(mirror);
1171       return;
1172     }
1173 
1174     Handle mirror;
1175     Handle comp_mirror;
1176 
1177     allocate_mirror(k, /*is_scratch=*/false, protection_domain, classData, mirror, comp_mirror, CHECK);
1178 
1179     // set the classLoader field in the java_lang_Class instance
1180     assert(class_loader() == k->class_loader(), "should be same");
1181     set_class_loader(mirror(), class_loader());
1182 
1183     // Setup indirection from klass->mirror
1184     // after any exceptions can happen during allocations.
1185     k->set_java_mirror(mirror);
1186 
1187     // Set the module field in the java_lang_Class instance.  This must be done
1188     // after the mirror is set.
1189     set_mirror_module_field(THREAD, k, mirror, module);
1190 
1191     if (comp_mirror() != nullptr) {
1192       // Set after k->java_mirror() is published, because compiled code running
1193       // concurrently doesn't expect a k to have a null java_mirror.
1194       release_set_array_klass(comp_mirror(), k);
1195     }
1196 
1197     if (CDSConfig::is_dumping_heap()) {
1198       create_scratch_mirror(k, CHECK);
1199     }
1200   } else {
1201     assert(!CDSConfig::is_using_aot_linked_classes(), "should not come here");
1202     assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1203     fixup_mirror_list()->push(k);
1204   }
1205 }
1206 
1207 #if INCLUDE_CDS_JAVA_HEAP
1208 // The "scratch mirror" stores the states of the mirror object that can be
1209 // decided at dump time (such as the initial values of the static fields, the
1210 // component mirror, etc). At runtime, more information is added to it by
1211 // java_lang_Class::restore_archived_mirror().
1212 //
1213 // Essentially, /*dumptime*/create_scratch_mirror() + /*runtime*/restore_archived_mirror()
1214 // produces the same result as /*runtime*/create_mirror().
1215 //
1216 // Note: we archive the "scratch mirror" instead of k->java_mirror(), because the
1217 // latter may contain dumptime-specific information that cannot be archived
1218 // (e.g., ClassLoaderData*, or static fields that are modified by Java code execution).
1219 void java_lang_Class::create_scratch_mirror(Klass* k, TRAPS) {
1220   if ((k->class_loader() != nullptr &&
1221        k->class_loader() != SystemDictionary::java_platform_loader() &&
1222        k->class_loader() != SystemDictionary::java_system_loader())) {
1223     // We only archive the mirrors of classes loaded by the built-in loaders
1224     return;
1225   }
1226 
1227   Handle protection_domain, classData; // set to null. Will be reinitialized at runtime
1228   Handle mirror;
1229   Handle comp_mirror;
1230   allocate_mirror(k, /*is_scratch=*/true, protection_domain, classData, mirror, comp_mirror, CHECK);
1231 
1232   if (comp_mirror() != nullptr) {
1233     release_set_array_klass(comp_mirror(), k);
1234   }
1235 
1236   HeapShared::set_scratch_java_mirror(k, mirror());
1237 }
1238 
1239 // Returns true if the mirror is updated, false if no archived mirror
1240 // data is present. After the archived mirror object is restored, the
1241 // shared klass' _has_raw_archived_mirror flag is cleared.
1242 bool java_lang_Class::restore_archived_mirror(Klass *k,
1243                                               Handle class_loader, Handle module,
1244                                               Handle protection_domain, TRAPS) {
1245   // Postpone restoring archived mirror until java.lang.Class is loaded. Please
1246   // see more details in vmClasses::resolve_all().
1247   if (!vmClasses::Class_klass_is_loaded() && !CDSConfig::is_using_aot_linked_classes()) {
1248     assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1249     fixup_mirror_list()->push(k);
1250     return true;
1251   }
1252 
1253   oop m = k->archived_java_mirror();
1254   assert(m != nullptr, "must have stored non-null archived mirror");
1255 
1256   // Sanity: clear it now to prevent re-initialization if any of the following fails
1257   k->clear_archived_mirror_index();
1258 
1259   // mirror is archived, restore
1260   log_debug(aot, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1261   Handle mirror(THREAD, m);
1262 
1263   if (!k->is_array_klass()) {
1264     assert(as_Klass(m) == k, "must be");
1265     // - local static final fields with initial values were initialized at dump time
1266 
1267     // create the init_lock
1268     typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false));
1269     set_init_lock(mirror(), r);
1270 
1271     if (protection_domain.not_null()) {
1272       set_protection_domain(mirror(), protection_domain());
1273     }
1274   } else {
1275     ObjArrayKlass* objarray_k = (ObjArrayKlass*)as_Klass(m);
1276     // Mirror should be restored for an ObjArrayKlass or one of its refined array klasses
1277     assert(objarray_k == k || objarray_k->next_refined_array_klass() == k, "must be");
1278   }
1279 
1280   assert(class_loader() == k->class_loader(), "should be same");
1281   if (class_loader.not_null()) {
1282     set_class_loader(mirror(), class_loader());
1283   }
1284 
1285   k->set_java_mirror(mirror);
1286 
1287   set_mirror_module_field(THREAD, k, mirror, module);
1288 
1289   if (log_is_enabled(Trace, aot, heap, mirror)) {
1290     ResourceMark rm(THREAD);
1291     log_trace(aot, heap, mirror)(
1292         "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1293   }
1294 
1295   return true;
1296 }
1297 #endif // INCLUDE_CDS_JAVA_HEAP
1298 
1299 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1300   assert(_module_offset != 0, "must have been computed already");
1301   set_module(k->java_mirror(), module());
1302 }
1303 
1304 void java_lang_Class::set_oop_size(HeapWord* java_class, size_t size) {
1305   assert(_oop_size_offset != 0, "must be set");
1306   assert(size > 0, "Oop size must be greater than zero, not %zu", size);
1307   assert(size <= INT_MAX, "Lossy conversion: %zu", size);
1308   *(int*)(((char*)java_class) + _oop_size_offset) = (int)size;
1309 }
1310 
1311 int  java_lang_Class::static_oop_field_count(oop java_class) {
1312   assert(_static_oop_field_count_offset != 0, "must be set");
1313   return java_class->int_field(_static_oop_field_count_offset);
1314 }
1315 
1316 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1317   assert(_static_oop_field_count_offset != 0, "must be set");
1318   java_class->int_field_put(_static_oop_field_count_offset, size);
1319 }
1320 
1321 oop java_lang_Class::protection_domain(oop java_class) {
1322   assert(_protection_domain_offset != 0, "must be set");
1323   return java_class->obj_field(_protection_domain_offset);
1324 }
1325 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1326   assert(_protection_domain_offset != 0, "must be set");
1327   java_class->obj_field_put(_protection_domain_offset, pd);
1328 }
1329 
1330 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1331   assert(_component_mirror_offset != 0, "must be set");
1332   assert(java_lang_Class::as_Klass(java_class) != nullptr &&
1333          java_lang_Class::as_Klass(java_class)->is_array_klass(), "must be");
1334   java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1335 }
1336 
1337 oop java_lang_Class::component_mirror(oop java_class) {
1338   assert(_component_mirror_offset != 0, "must be set");
1339   return java_class->obj_field(_component_mirror_offset);
1340 }
1341 
1342 oop java_lang_Class::init_lock(oop java_class) {
1343   assert(_init_lock_offset != 0, "must be set");
1344   return java_class->obj_field(_init_lock_offset);
1345 }
1346 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
1347   assert(_init_lock_offset != 0, "must be set");
1348   java_class->obj_field_put(_init_lock_offset, init_lock);
1349 }
1350 
1351 objArrayOop java_lang_Class::signers(oop java_class) {
1352   assert(_signers_offset != 0, "must be set");
1353   return (objArrayOop)java_class->obj_field(_signers_offset);
1354 }
1355 
1356 oop java_lang_Class::class_data(oop java_class) {
1357   assert(_classData_offset != 0, "must be set");
1358   return java_class->obj_field(_classData_offset);
1359 }
1360 void java_lang_Class::set_class_data(oop java_class, oop class_data) {
1361   assert(_classData_offset != 0, "must be set");
1362   java_class->obj_field_put(_classData_offset, class_data);
1363 }
1364 
1365 void java_lang_Class::set_reflection_data(oop java_class, oop reflection_data) {
1366   assert(_reflectionData_offset != 0, "must be set");
1367   java_class->obj_field_put(_reflectionData_offset, reflection_data);
1368 }
1369 
1370 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1371   assert(_class_loader_offset != 0, "offsets should have been initialized");
1372   java_class->obj_field_put(_class_loader_offset, loader);
1373 }
1374 
1375 oop java_lang_Class::class_loader(oop java_class) {
1376   assert(_class_loader_offset != 0, "must be set");
1377   return java_class->obj_field(_class_loader_offset);
1378 }
1379 
1380 oop java_lang_Class::module(oop java_class) {
1381   assert(_module_offset != 0, "must be set");
1382   return java_class->obj_field(_module_offset);
1383 }
1384 
1385 void java_lang_Class::set_module(oop java_class, oop module) {
1386   assert(_module_offset != 0, "must be set");
1387   java_class->obj_field_put(_module_offset, module);
1388 }
1389 
1390 oop java_lang_Class::name(Handle java_class, TRAPS) {
1391   assert(_name_offset != 0, "must be set");
1392   oop o = java_class->obj_field(_name_offset);
1393   if (o == nullptr) {
1394     o = StringTable::intern(as_external_name(java_class()), THREAD);
1395     java_class->obj_field_put(_name_offset, o);
1396   }
1397   return o;
1398 }
1399 
1400 oop java_lang_Class::source_file(oop java_class) {
1401   assert(_source_file_offset != 0, "must be set");
1402   return java_class->obj_field(_source_file_offset);
1403 }
1404 
1405 void java_lang_Class::set_source_file(oop java_class, oop source_file) {
1406   assert(_source_file_offset != 0, "must be set");
1407   java_class->obj_field_put(_source_file_offset, source_file);
1408 }
1409 
1410 void java_lang_Class::set_is_primitive(oop java_class) {
1411   assert(_is_primitive_offset != 0, "must be set");
1412   java_class->bool_field_put(_is_primitive_offset, true);
1413 }
1414 
1415 
1416 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1417   // Mirrors for basic types have a null klass field, which makes them special.
1418   oop java_class = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(nullptr, CHECK_NULL);
1419   if (type != T_VOID) {
1420     Klass* aklass = Universe::typeArrayKlass(type);
1421     assert(aklass != nullptr, "correct bootstrap");
1422     release_set_array_klass(java_class, aklass);
1423   }
1424 #ifdef ASSERT
1425   InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(vmClasses::Class_klass());
1426   assert(static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1427 #endif
1428   set_modifiers(java_class, JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC);
1429   set_raw_access_flags(java_class, JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC);
1430 
1431   set_is_primitive(java_class);
1432   return java_class;
1433 }
1434 
1435 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1436   assert(is_instance(java_class), "must be a Class object");
1437   java_class->metadata_field_put(_klass_offset, klass);
1438 }
1439 
1440 
1441 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1442   assert(is_instance(java_class), "must be a Class object");
1443   Symbol* name = nullptr;
1444   bool is_instance = false;
1445   if (is_primitive(java_class)) {
1446     name = vmSymbols::type_signature(primitive_type(java_class));
1447   } else {
1448     Klass* k = as_Klass(java_class);
1449     is_instance = k->is_instance_klass();
1450     name = k->name();
1451   }
1452   if (name == nullptr) {
1453     st->print("<null>");
1454     return;
1455   }
1456   if (is_instance)  {
1457     st->print("L");
1458   }
1459   st->write((char*) name->base(), (int) name->utf8_length());
1460   if (is_instance)  st->print(";");
1461 }
1462 
1463 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) {
1464   assert(is_instance(java_class), "must be a Class object");
1465   Symbol* name;
1466   if (is_primitive(java_class)) {
1467     name = vmSymbols::type_signature(primitive_type(java_class));
1468     // Because this can create a new symbol, the caller has to decrement
1469     // the refcount, so make adjustment here and below for symbols returned
1470     // that are not created or incremented due to a successful lookup.
1471     name->increment_refcount();
1472   } else {
1473     Klass* k = as_Klass(java_class);
1474     if (!k->is_instance_klass()) {
1475       name = k->name();
1476       name->increment_refcount();
1477     } else {
1478       ResourceMark rm;
1479       const char* sigstr = k->signature_name();
1480       int         siglen = (int) strlen(sigstr);
1481       if (!intern_if_not_found) {
1482         name = SymbolTable::probe(sigstr, siglen);
1483       } else {
1484         name = SymbolTable::new_symbol(sigstr, siglen);
1485       }
1486     }
1487   }
1488   return name;
1489 }
1490 
1491 // Returns the Java name for this Java mirror (Resource allocated)
1492 // See Klass::external_name().
1493 // For primitive type Java mirrors, its type name is returned.
1494 const char* java_lang_Class::as_external_name(oop java_class) {
1495   assert(is_instance(java_class), "must be a Class object");
1496   const char* name = nullptr;
1497   if (is_primitive(java_class)) {
1498     name = type2name(primitive_type(java_class));
1499   } else {
1500     name = as_Klass(java_class)->external_name();
1501   }
1502   if (name == nullptr) {
1503     name = "<null>";
1504   }
1505   return name;
1506 }
1507 
1508 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1509   Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1510   assert(k == nullptr || (k->is_klass() && k->is_array_klass()), "should be array klass");
1511   return k;
1512 }
1513 
1514 
1515 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1516   assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1517   assert(!klass->is_refined_objArray_klass(), "should not be ref or flat array klass");
1518   java_class->release_metadata_field_put(_array_klass_offset, klass);
1519 }
1520 
1521 
1522 BasicType java_lang_Class::primitive_type(oop java_class) {
1523   assert(is_primitive(java_class), "just checking");
1524   Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1525   BasicType type = T_VOID;
1526   if (ak != nullptr) {
1527     // Note: create_basic_type_mirror above initializes ak to a non-null value.
1528     type = ArrayKlass::cast(ak)->element_type();
1529   } else {
1530     assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
1531   }
1532 #ifdef ASSERT
1533   if (CDSConfig::is_dumping_heap()) {
1534     oop mirror = Universe::java_mirror(type);
1535     oop scratch_mirror = HeapShared::scratch_java_mirror(type);
1536     assert(java_class == mirror || java_class == scratch_mirror, "must be consistent");
1537   } else {
1538     assert(Universe::java_mirror(type) == java_class, "must be consistent");
1539   }
1540 #endif
1541   return type;
1542 }
1543 
1544 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1545   assert(is_instance(java_class), "must be a Class object");
1546   if (is_primitive(java_class)) {
1547     if (reference_klass != nullptr)
1548       (*reference_klass) = nullptr;
1549     return primitive_type(java_class);
1550   } else {
1551     if (reference_klass != nullptr)
1552       (*reference_klass) = as_Klass(java_class);
1553     return T_OBJECT;
1554   }
1555 }
1556 
1557 
1558 oop java_lang_Class::primitive_mirror(BasicType t) {
1559   oop mirror = Universe::java_mirror(t);
1560   assert(mirror != nullptr && mirror->is_a(vmClasses::Class_klass()), "must be a Class");
1561   assert(is_primitive(mirror), "must be primitive");
1562   return mirror;
1563 }
1564 
1565 #define CLASS_FIELDS_DO(macro) \
1566   macro(_classRedefinedCount_offset, k, "classRedefinedCount", int_signature,          false); \
1567   macro(_class_loader_offset,        k, "classLoader",         classloader_signature,  false); \
1568   macro(_component_mirror_offset,    k, "componentType",       class_signature,        false); \
1569   macro(_module_offset,              k, "module",              module_signature,       false); \
1570   macro(_name_offset,                k, "name",                string_signature,       false); \
1571   macro(_classData_offset,           k, "classData",           object_signature,       false); \
1572   macro(_reflectionData_offset,      k, "reflectionData",      java_lang_ref_SoftReference_signature, false); \
1573   macro(_signers_offset,             k, "signers",             object_array_signature, false); \
1574   macro(_modifiers_offset,           k, vmSymbols::modifiers_name(), char_signature,    false); \
1575   macro(_raw_access_flags_offset,    k, "classFileAccessFlags",      char_signature,    false); \
1576   macro(_protection_domain_offset,   k, "protectionDomain",    java_security_ProtectionDomain_signature,  false); \
1577   macro(_is_primitive_offset,        k, "primitive",           bool_signature,         false);
1578 
1579 void java_lang_Class::compute_offsets() {
1580   if (_offsets_computed) {
1581     return;
1582   }
1583 
1584   _offsets_computed = true;
1585 
1586   InstanceKlass* k = vmClasses::Class_klass();
1587   CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1588   CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1589 }
1590 
1591 #if INCLUDE_CDS
1592 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1593   f->do_bool(&_offsets_computed);
1594 
1595   CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1596 
1597   CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1598 }
1599 #endif
1600 
1601 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1602   assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1603   return the_class_mirror->int_field(_classRedefinedCount_offset);
1604 }
1605 
1606 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1607   assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1608   the_class_mirror->int_field_put(_classRedefinedCount_offset, value);
1609 }
1610 
1611 int java_lang_Class::modifiers(oop the_class_mirror) {
1612   assert(_modifiers_offset != 0, "offsets should have been initialized");
1613   return the_class_mirror->char_field(_modifiers_offset);
1614 }
1615 
1616 void java_lang_Class::set_modifiers(oop the_class_mirror, u2 value) {
1617   assert(_modifiers_offset != 0, "offsets should have been initialized");
1618   the_class_mirror->char_field_put(_modifiers_offset, value);
1619 }
1620 
1621 int java_lang_Class::raw_access_flags(oop the_class_mirror) {
1622   assert(_raw_access_flags_offset != 0, "offsets should have been initialized");
1623   return the_class_mirror->char_field(_raw_access_flags_offset);
1624 }
1625 
1626 void java_lang_Class::set_raw_access_flags(oop the_class_mirror, u2 value) {
1627   assert(_raw_access_flags_offset != 0, "offsets should have been initialized");
1628   the_class_mirror->char_field_put(_raw_access_flags_offset, value);
1629 }
1630 
1631 
1632 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1633 //       platform thread structure, and a eetop offset which was used for thread
1634 //       local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1635 //       merged, so in the HotSpot VM we just use the eetop field for the thread
1636 //       instead of the privateInfo_offset.
1637 //
1638 // Note: The stackSize field is only present starting in 1.4.
1639 
1640 int java_lang_Thread_FieldHolder::_group_offset;
1641 int java_lang_Thread_FieldHolder::_priority_offset;
1642 int java_lang_Thread_FieldHolder::_stackSize_offset;
1643 int java_lang_Thread_FieldHolder::_daemon_offset;
1644 int java_lang_Thread_FieldHolder::_thread_status_offset;
1645 
1646 #define THREAD_FIELD_HOLDER_FIELDS_DO(macro) \
1647   macro(_group_offset,         k, vmSymbols::group_name(),    threadgroup_signature, false); \
1648   macro(_priority_offset,      k, vmSymbols::priority_name(), int_signature,         false); \
1649   macro(_stackSize_offset,     k, "stackSize",                long_signature,        false); \
1650   macro(_daemon_offset,        k, vmSymbols::daemon_name(),   bool_signature,        false); \
1651   macro(_thread_status_offset, k, "threadStatus",             int_signature,         false)
1652 
1653 void java_lang_Thread_FieldHolder::compute_offsets() {
1654   assert(_group_offset == 0, "offsets should be initialized only once");
1655 
1656   InstanceKlass* k = vmClasses::Thread_FieldHolder_klass();
1657   THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1658 }
1659 
1660 #if INCLUDE_CDS
1661 void java_lang_Thread_FieldHolder::serialize_offsets(SerializeClosure* f) {
1662   THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1663 }
1664 #endif
1665 
1666 oop java_lang_Thread_FieldHolder::threadGroup(oop holder) {
1667   return holder->obj_field(_group_offset);
1668 }
1669 
1670 ThreadPriority java_lang_Thread_FieldHolder::priority(oop holder) {
1671   return (ThreadPriority)holder->int_field(_priority_offset);
1672 }
1673 
1674 void java_lang_Thread_FieldHolder::set_priority(oop holder, ThreadPriority priority) {
1675   holder->int_field_put(_priority_offset, priority);
1676 }
1677 
1678 jlong java_lang_Thread_FieldHolder::stackSize(oop holder) {
1679   return holder->long_field(_stackSize_offset);
1680 }
1681 
1682 bool java_lang_Thread_FieldHolder::is_daemon(oop holder) {
1683   return holder->bool_field(_daemon_offset) != 0;
1684 }
1685 
1686 void java_lang_Thread_FieldHolder::set_daemon(oop holder, bool val) {
1687   assert(val, "daemon status is never turned off");
1688   holder->bool_field_put(_daemon_offset, val);
1689 }
1690 
1691 void java_lang_Thread_FieldHolder::set_thread_status(oop holder, JavaThreadStatus status) {
1692   holder->int_field_put(_thread_status_offset, static_cast<int>(status));
1693 }
1694 
1695 JavaThreadStatus java_lang_Thread_FieldHolder::get_thread_status(oop holder) {
1696   return static_cast<JavaThreadStatus>(holder->int_field(_thread_status_offset));
1697 }
1698 
1699 
1700 int java_lang_Thread_Constants::_static_VTHREAD_GROUP_offset = 0;
1701 
1702 #define THREAD_CONSTANTS_STATIC_FIELDS_DO(macro) \
1703   macro(_static_VTHREAD_GROUP_offset,             k, "VTHREAD_GROUP",             threadgroup_signature, true);
1704 
1705 void java_lang_Thread_Constants::compute_offsets() {
1706   assert(_static_VTHREAD_GROUP_offset == 0, "offsets should be initialized only once");
1707 
1708   InstanceKlass* k = vmClasses::Thread_Constants_klass();
1709   THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1710 }
1711 
1712 #if INCLUDE_CDS
1713 void java_lang_Thread_Constants::serialize_offsets(SerializeClosure* f) {
1714   THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1715 }
1716 #endif
1717 
1718 oop java_lang_Thread_Constants::get_VTHREAD_GROUP() {
1719   InstanceKlass* k = vmClasses::Thread_Constants_klass();
1720   oop base = k->static_field_base_raw();
1721   return base->obj_field(_static_VTHREAD_GROUP_offset);
1722 }
1723 
1724 
1725 int java_lang_Thread::_holder_offset;
1726 int java_lang_Thread::_name_offset;
1727 int java_lang_Thread::_contextClassLoader_offset;
1728 int java_lang_Thread::_eetop_offset;
1729 int java_lang_Thread::_jvmti_thread_state_offset;
1730 int java_lang_Thread::_jvmti_VTMS_transition_disable_count_offset;
1731 int java_lang_Thread::_jvmti_is_in_VTMS_transition_offset;
1732 int java_lang_Thread::_interrupted_offset;
1733 int java_lang_Thread::_interruptLock_offset;
1734 int java_lang_Thread::_tid_offset;
1735 int java_lang_Thread::_continuation_offset;
1736 int java_lang_Thread::_park_blocker_offset;
1737 int java_lang_Thread::_scopedValueBindings_offset;
1738 JFR_ONLY(int java_lang_Thread::_jfr_epoch_offset;)
1739 
1740 #define THREAD_FIELDS_DO(macro) \
1741   macro(_holder_offset,        k, "holder", thread_fieldholder_signature, false); \
1742   macro(_name_offset,          k, vmSymbols::name_name(), string_signature, false); \
1743   macro(_contextClassLoader_offset, k, "contextClassLoader", classloader_signature, false); \
1744   macro(_eetop_offset,         k, "eetop", long_signature, false); \
1745   macro(_interrupted_offset,   k, "interrupted", bool_signature, false); \
1746   macro(_interruptLock_offset, k, "interruptLock", object_signature, false); \
1747   macro(_tid_offset,           k, "tid", long_signature, false); \
1748   macro(_park_blocker_offset,  k, "parkBlocker", object_signature, false); \
1749   macro(_continuation_offset,  k, "cont", continuation_signature, false); \
1750   macro(_scopedValueBindings_offset, k, "scopedValueBindings", object_signature, false);
1751 
1752 void java_lang_Thread::compute_offsets() {
1753   assert(_holder_offset == 0, "offsets should be initialized only once");
1754 
1755   InstanceKlass* k = vmClasses::Thread_klass();
1756   THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1757   THREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1758 }
1759 
1760 #if INCLUDE_CDS
1761 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1762   THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1763   THREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1764 }
1765 #endif
1766 
1767 JavaThread* java_lang_Thread::thread(oop java_thread) {
1768   return reinterpret_cast<JavaThread*>(java_thread->address_field(_eetop_offset));
1769 }
1770 
1771 JavaThread* java_lang_Thread::thread_acquire(oop java_thread) {
1772   return reinterpret_cast<JavaThread*>(java_thread->address_field_acquire(_eetop_offset));
1773 }
1774 
1775 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1776   java_thread->address_field_put(_eetop_offset, (address)thread);
1777 }
1778 
1779 void java_lang_Thread::release_set_thread(oop java_thread, JavaThread* thread) {
1780   java_thread->release_address_field_put(_eetop_offset, (address)thread);
1781 }
1782 
1783 JvmtiThreadState* java_lang_Thread::jvmti_thread_state(oop java_thread) {
1784   return (JvmtiThreadState*)java_thread->address_field(_jvmti_thread_state_offset);
1785 }
1786 
1787 void java_lang_Thread::set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state) {
1788   java_thread->address_field_put(_jvmti_thread_state_offset, (address)state);
1789 }
1790 
1791 int java_lang_Thread::VTMS_transition_disable_count(oop java_thread) {
1792   return java_thread->int_field(_jvmti_VTMS_transition_disable_count_offset);
1793 }
1794 
1795 void java_lang_Thread::inc_VTMS_transition_disable_count(oop java_thread) {
1796   assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1797   int val = VTMS_transition_disable_count(java_thread);
1798   java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val + 1);
1799 }
1800 
1801 void java_lang_Thread::dec_VTMS_transition_disable_count(oop java_thread) {
1802   assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1803   int val = VTMS_transition_disable_count(java_thread);
1804   assert(val > 0, "VTMS_transition_disable_count should never be negative");
1805   java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val - 1);
1806 }
1807 
1808 bool java_lang_Thread::is_in_VTMS_transition(oop java_thread) {
1809   return java_thread->bool_field_volatile(_jvmti_is_in_VTMS_transition_offset);
1810 }
1811 
1812 void java_lang_Thread::set_is_in_VTMS_transition(oop java_thread, bool val) {
1813   assert(is_in_VTMS_transition(java_thread) != val, "already %s transition", val ? "inside" : "outside");
1814   java_thread->bool_field_put_volatile(_jvmti_is_in_VTMS_transition_offset, val);
1815 }
1816 
1817 int java_lang_Thread::is_in_VTMS_transition_offset() {
1818   return _jvmti_is_in_VTMS_transition_offset;
1819 }
1820 
1821 void java_lang_Thread::clear_scopedValueBindings(oop java_thread) {
1822   assert(java_thread != nullptr, "need a java_lang_Thread pointer here");
1823   java_thread->obj_field_put(_scopedValueBindings_offset, nullptr);
1824 }
1825 
1826 oop java_lang_Thread::holder(oop java_thread) {
1827   // Note: may return null if the thread is still attaching
1828   return java_thread->obj_field(_holder_offset);
1829 }
1830 oop java_lang_Thread::interrupt_lock(oop java_thread) {
1831   return java_thread->obj_field(_interruptLock_offset);
1832 }
1833 
1834 bool java_lang_Thread::interrupted(oop java_thread) {
1835   // Make sure the caller can safely access oops.
1836   assert(Thread::current()->is_VM_thread() ||
1837          (JavaThread::current()->thread_state() != _thread_blocked &&
1838           JavaThread::current()->thread_state() != _thread_in_native),
1839          "Unsafe access to oop");
1840   return java_thread->bool_field_volatile(_interrupted_offset);
1841 }
1842 
1843 void java_lang_Thread::set_interrupted(oop java_thread, bool val) {
1844   // Make sure the caller can safely access oops.
1845   assert(Thread::current()->is_VM_thread() ||
1846          (JavaThread::current()->thread_state() != _thread_blocked &&
1847           JavaThread::current()->thread_state() != _thread_in_native),
1848          "Unsafe access to oop");
1849   java_thread->bool_field_put_volatile(_interrupted_offset, val);
1850 }
1851 
1852 
1853 oop java_lang_Thread::name(oop java_thread) {
1854   return java_thread->obj_field(_name_offset);
1855 }
1856 
1857 
1858 void java_lang_Thread::set_name(oop java_thread, oop name) {
1859   java_thread->obj_field_put(_name_offset, name);
1860 }
1861 
1862 // Convenience macros for setting and getting Thread fields that
1863 // are actually stored in the FieldHolder object of the thread.
1864 // The FieldHolder can be null whilst a thread is attaching via
1865 // JNI, and when the main thread is attaching.
1866 
1867 // The default value should be the default/zero initialized value
1868 // of the field as it would be in java.lang.Thread.FieldHolder.
1869 #define GET_FIELDHOLDER_FIELD(java_thread, field, default_val)  \
1870   {                                                             \
1871     oop holder = java_lang_Thread::holder(java_thread);         \
1872     if (holder != nullptr)                                      \
1873       return java_lang_Thread_FieldHolder::field(holder);       \
1874     else                                                        \
1875       return default_val;                                       \
1876   }
1877 
1878 // We should never be trying to set a field of an attaching thread.
1879 #define SET_FIELDHOLDER_FIELD(java_thread, field, value)        \
1880   {                                                             \
1881     oop holder = java_lang_Thread::holder(java_thread);         \
1882     assert(holder != nullptr, "Thread not fully initialized");  \
1883     java_lang_Thread_FieldHolder::set_##field(holder, value);   \
1884   }
1885 
1886 
1887 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1888   GET_FIELDHOLDER_FIELD(java_thread, priority, (ThreadPriority)0);
1889 }
1890 
1891 
1892 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1893   SET_FIELDHOLDER_FIELD(java_thread, priority, priority)
1894 }
1895 
1896 
1897 oop java_lang_Thread::threadGroup(oop java_thread) {
1898   GET_FIELDHOLDER_FIELD(java_thread, threadGroup, nullptr);
1899 }
1900 
1901 
1902 bool java_lang_Thread::is_alive(oop java_thread) {
1903   JavaThread* thr = java_lang_Thread::thread(java_thread);
1904   return (thr != nullptr);
1905 }
1906 
1907 
1908 bool java_lang_Thread::is_daemon(oop java_thread) {
1909   GET_FIELDHOLDER_FIELD(java_thread, is_daemon, false);
1910 }
1911 
1912 
1913 void java_lang_Thread::set_daemon(oop java_thread) {
1914   SET_FIELDHOLDER_FIELD(java_thread, daemon, true);
1915 }
1916 
1917 oop java_lang_Thread::context_class_loader(oop java_thread) {
1918   return java_thread->obj_field(_contextClassLoader_offset);
1919 }
1920 
1921 
1922 jlong java_lang_Thread::stackSize(oop java_thread) {
1923   GET_FIELDHOLDER_FIELD(java_thread, stackSize, 0);
1924 }
1925 
1926 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1927 void java_lang_Thread::set_thread_status(oop java_thread, JavaThreadStatus status) {
1928   SET_FIELDHOLDER_FIELD(java_thread, thread_status, status);
1929 }
1930 
1931 // Read thread status value from threadStatus field in java.lang.Thread java class.
1932 JavaThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1933   // Make sure the caller is operating on behalf of the VM or is
1934   // running VM code (state == _thread_in_vm).
1935   assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1936          JavaThread::current()->thread_state() == _thread_in_vm ||
1937          JavaThread::current() == java_lang_Thread::thread(java_thread),
1938          "unsafe call to java_lang_Thread::get_thread_status()?");
1939   GET_FIELDHOLDER_FIELD(java_thread, get_thread_status, JavaThreadStatus::NEW /* not initialized */);
1940 }
1941 
1942 ByteSize java_lang_Thread::thread_id_offset() {
1943   return in_ByteSize(_tid_offset);
1944 }
1945 
1946 oop java_lang_Thread::park_blocker(oop java_thread) {
1947   return java_thread->obj_field_access<MO_RELAXED>(_park_blocker_offset);
1948 }
1949 
1950 // Obtain stack trace for platform or mounted virtual thread.
1951 // If jthread is a virtual thread and it has been unmounted (or remounted to different carrier) the method returns null.
1952 // The caller (java.lang.VirtualThread) handles returned nulls via retry.
1953 oop java_lang_Thread::async_get_stack_trace(jobject jthread, TRAPS) {
1954   ThreadsListHandle tlh(THREAD);
1955   JavaThread* java_thread = nullptr;
1956   oop thread_oop;
1957 
1958   bool has_java_thread = tlh.cv_internal_thread_to_JavaThread(jthread, &java_thread, &thread_oop);
1959   if (!has_java_thread) {
1960     return nullptr;
1961   }
1962 
1963   class GetStackTraceHandshakeClosure : public HandshakeClosure {
1964   public:
1965     const Handle _thread_h;
1966     int _depth;
1967     bool _retry_handshake;
1968     GrowableArray<Method*>* _methods;
1969     GrowableArray<int>*     _bcis;
1970 
1971     GetStackTraceHandshakeClosure(Handle thread_h) :
1972         HandshakeClosure("GetStackTraceHandshakeClosure"), _thread_h(thread_h), _depth(0), _retry_handshake(false),
1973         _methods(nullptr), _bcis(nullptr) {
1974     }
1975     ~GetStackTraceHandshakeClosure() {
1976       delete _methods;
1977       delete _bcis;
1978     }
1979 
1980     bool read_reset_retry() {
1981       bool ret = _retry_handshake;
1982       // If we re-execute the handshake this method need to return false
1983       // when the handshake cannot be performed. (E.g. thread terminating)
1984       _retry_handshake = false;
1985       return ret;
1986     }
1987 
1988     void do_thread(Thread* th) {
1989       if (!Thread::current()->is_Java_thread()) {
1990         _retry_handshake = true;
1991         return;
1992       }
1993 
1994       JavaThread* java_thread = JavaThread::cast(th);
1995 
1996       if (!java_thread->has_last_Java_frame()) {
1997         return;
1998       }
1999 
2000       bool carrier = false;
2001       if (java_lang_VirtualThread::is_instance(_thread_h())) {
2002         // Ensure _thread_h is still mounted to java_thread.
2003         const ContinuationEntry* ce = java_thread->vthread_continuation();
2004         if (ce == nullptr || ce->cont_oop(java_thread) != java_lang_VirtualThread::continuation(_thread_h())) {
2005           // Target thread has been unmounted.
2006           return;
2007         }
2008       } else {
2009         carrier = (java_thread->vthread_continuation() != nullptr);
2010       }
2011 
2012       const int max_depth = MaxJavaStackTraceDepth;
2013       const bool skip_hidden = !ShowHiddenFrames;
2014 
2015       // Pick minimum length that will cover most cases
2016       int init_length = 64;
2017       _methods = new (mtInternal) GrowableArray<Method*>(init_length, mtInternal);
2018       _bcis = new (mtInternal) GrowableArray<int>(init_length, mtInternal);
2019 
2020       int total_count = 0;
2021       for (vframeStream vfst(java_thread, false, false, carrier); // we don't process frames as we don't care about oops
2022            !vfst.at_end() && (max_depth == 0 || max_depth != total_count);
2023            vfst.next()) {
2024 
2025         if (skip_hidden && (vfst.method()->is_hidden() ||
2026                             vfst.method()->is_continuation_enter_intrinsic())) {
2027           continue;
2028         }
2029 
2030         _methods->push(vfst.method());
2031         _bcis->push(vfst.bci());
2032         total_count++;
2033       }
2034 
2035       _depth = total_count;
2036     }
2037   };
2038 
2039   // Handshake with target
2040   ResourceMark rm(THREAD);
2041   HandleMark   hm(THREAD);
2042   GetStackTraceHandshakeClosure gsthc(Handle(THREAD, thread_oop));
2043   do {
2044    Handshake::execute(&gsthc, &tlh, java_thread);
2045   } while (gsthc.read_reset_retry());
2046 
2047   // Stop if no stack trace is found.
2048   if (gsthc._depth == 0) {
2049     return nullptr;
2050   }
2051 
2052   // Convert to StackTraceElement array
2053   InstanceKlass* k = vmClasses::StackTraceElement_klass();
2054   assert(k != nullptr, "must be loaded in 1.4+");
2055   if (k->should_be_initialized()) {
2056     k->initialize(CHECK_NULL);
2057   }
2058   objArrayHandle trace = oopFactory::new_objArray_handle(k, gsthc._depth, CHECK_NULL);
2059 
2060   for (int i = 0; i < gsthc._depth; i++) {
2061     methodHandle method(THREAD, gsthc._methods->at(i));
2062     oop element = java_lang_StackTraceElement::create(method,
2063                                                       gsthc._bcis->at(i),
2064                                                       CHECK_NULL);
2065     trace->obj_at_put(i, element);
2066   }
2067 
2068   return trace();
2069 }
2070 
2071 const char* java_lang_Thread::thread_status_name(oop java_thread) {
2072   JavaThreadStatus status = get_thread_status(java_thread);
2073   switch (status) {
2074     case JavaThreadStatus::NEW                      : return "NEW";
2075     case JavaThreadStatus::RUNNABLE                 : return "RUNNABLE";
2076     case JavaThreadStatus::SLEEPING                 : return "TIMED_WAITING (sleeping)";
2077     case JavaThreadStatus::IN_OBJECT_WAIT           : return "WAITING (on object monitor)";
2078     case JavaThreadStatus::IN_OBJECT_WAIT_TIMED     : return "TIMED_WAITING (on object monitor)";
2079     case JavaThreadStatus::PARKED                   : return "WAITING (parking)";
2080     case JavaThreadStatus::PARKED_TIMED             : return "TIMED_WAITING (parking)";
2081     case JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
2082     case JavaThreadStatus::TERMINATED               : return "TERMINATED";
2083     default                       : return "UNKNOWN";
2084   };
2085 }
2086 int java_lang_ThreadGroup::_parent_offset;
2087 int java_lang_ThreadGroup::_name_offset;
2088 int java_lang_ThreadGroup::_maxPriority_offset;
2089 int java_lang_ThreadGroup::_daemon_offset;
2090 
2091 oop  java_lang_ThreadGroup::parent(oop java_thread_group) {
2092   assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2093   return java_thread_group->obj_field(_parent_offset);
2094 }
2095 
2096 // ("name as oop" accessor is not necessary)
2097 
2098 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
2099   oop name = java_thread_group->obj_field(_name_offset);
2100   // ThreadGroup.name can be null
2101   if (name != nullptr) {
2102     return java_lang_String::as_utf8_string(name);
2103   }
2104   return nullptr;
2105 }
2106 
2107 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
2108   assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2109   return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
2110 }
2111 
2112 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
2113   assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2114   return java_thread_group->bool_field(_daemon_offset) != 0;
2115 }
2116 
2117 #define THREADGROUP_FIELDS_DO(macro) \
2118   macro(_parent_offset,      k, vmSymbols::parent_name(),      threadgroup_signature,         false); \
2119   macro(_name_offset,        k, vmSymbols::name_name(),        string_signature,              false); \
2120   macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature,                 false); \
2121   macro(_daemon_offset,      k, vmSymbols::daemon_name(),      bool_signature,                false);
2122 
2123 void java_lang_ThreadGroup::compute_offsets() {
2124   assert(_parent_offset == 0, "offsets should be initialized only once");
2125 
2126   InstanceKlass* k = vmClasses::ThreadGroup_klass();
2127   THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2128 }
2129 
2130 #if INCLUDE_CDS
2131 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
2132   THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2133 }
2134 #endif
2135 
2136 
2137 // java_lang_VirtualThread
2138 
2139 int java_lang_VirtualThread::static_vthread_scope_offset;
2140 int java_lang_VirtualThread::_carrierThread_offset;
2141 int java_lang_VirtualThread::_continuation_offset;
2142 int java_lang_VirtualThread::_state_offset;
2143 int java_lang_VirtualThread::_next_offset;
2144 int java_lang_VirtualThread::_onWaitingList_offset;
2145 int java_lang_VirtualThread::_notified_offset;
2146 int java_lang_VirtualThread::_timeout_offset;
2147 int java_lang_VirtualThread::_objectWaiter_offset;
2148 
2149 #define VTHREAD_FIELDS_DO(macro) \
2150   macro(static_vthread_scope_offset,       k, "VTHREAD_SCOPE",      continuationscope_signature, true);  \
2151   macro(_carrierThread_offset,             k, "carrierThread",      thread_signature,            false); \
2152   macro(_continuation_offset,              k, "cont",               continuation_signature,      false); \
2153   macro(_state_offset,                     k, "state",              int_signature,               false); \
2154   macro(_next_offset,                      k, "next",               vthread_signature,           false); \
2155   macro(_onWaitingList_offset,             k, "onWaitingList",      bool_signature,              false); \
2156   macro(_notified_offset,                  k, "notified",           bool_signature,              false); \
2157   macro(_timeout_offset,                   k, "timeout",            long_signature,              false);
2158 
2159 
2160 void java_lang_VirtualThread::compute_offsets() {
2161   InstanceKlass* k = vmClasses::VirtualThread_klass();
2162   VTHREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2163   VTHREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2164 }
2165 
2166 bool java_lang_VirtualThread::is_instance(oop obj) {
2167   return obj != nullptr && is_subclass(obj->klass());
2168 }
2169 
2170 oop java_lang_VirtualThread::carrier_thread(oop vthread) {
2171   oop thread = vthread->obj_field(_carrierThread_offset);
2172   return thread;
2173 }
2174 
2175 oop java_lang_VirtualThread::continuation(oop vthread) {
2176   oop cont = vthread->obj_field(_continuation_offset);
2177   return cont;
2178 }
2179 
2180 int java_lang_VirtualThread::state(oop vthread) {
2181   return vthread->int_field_acquire(_state_offset);
2182 }
2183 
2184 void java_lang_VirtualThread::set_state(oop vthread, int state) {
2185   vthread->release_int_field_put(_state_offset, state);
2186 }
2187 
2188 int java_lang_VirtualThread::cmpxchg_state(oop vthread, int old_state, int new_state) {
2189   jint* addr = vthread->field_addr<jint>(_state_offset);
2190   int res = AtomicAccess::cmpxchg(addr, old_state, new_state);
2191   return res;
2192 }
2193 
2194 oop java_lang_VirtualThread::next(oop vthread) {
2195   return vthread->obj_field(_next_offset);
2196 }
2197 
2198 void java_lang_VirtualThread::set_next(oop vthread, oop next_vthread) {
2199   vthread->obj_field_put(_next_offset, next_vthread);
2200 }
2201 
2202 // Add vthread to the waiting list if it's not already in it. Multiple threads
2203 // could be trying to add vthread to the list at the same time, so we control
2204 // access with a cmpxchg on onWaitingList. The winner adds vthread to the list.
2205 // Method returns true if we added vthread to the list, false otherwise.
2206 bool java_lang_VirtualThread::set_onWaitingList(oop vthread, OopHandle& list_head) {
2207   jboolean* addr = vthread->field_addr<jboolean>(_onWaitingList_offset);
2208   jboolean vthread_on_list = AtomicAccess::load(addr);
2209   if (!vthread_on_list) {
2210     vthread_on_list = AtomicAccess::cmpxchg(addr, (jboolean)JNI_FALSE, (jboolean)JNI_TRUE);
2211     if (!vthread_on_list) {
2212       for (;;) {
2213         oop head = list_head.resolve();
2214         java_lang_VirtualThread::set_next(vthread, head);
2215         if (list_head.cmpxchg(head, vthread) == head) return true;
2216       }
2217     }
2218   }
2219   return false; // already on waiting list
2220 }
2221 
2222 void java_lang_VirtualThread::set_notified(oop vthread, jboolean value) {
2223   vthread->bool_field_put_volatile(_notified_offset, value);
2224 }
2225 
2226 jlong java_lang_VirtualThread::timeout(oop vthread) {
2227   return vthread->long_field(_timeout_offset);
2228 }
2229 
2230 void java_lang_VirtualThread::set_timeout(oop vthread, jlong value) {
2231   vthread->long_field_put(_timeout_offset, value);
2232 }
2233 
2234 JavaThreadStatus java_lang_VirtualThread::map_state_to_thread_status(int state) {
2235   JavaThreadStatus status = JavaThreadStatus::NEW;
2236   switch (state & ~SUSPENDED) {
2237     case NEW:
2238       status = JavaThreadStatus::NEW;
2239       break;
2240     case STARTED:
2241     case RUNNING:
2242     case PARKING:
2243     case TIMED_PARKING:
2244     case UNPARKED:
2245     case YIELDING:
2246     case YIELDED:
2247     case UNBLOCKED:
2248     case WAITING:
2249     case TIMED_WAITING:
2250       status = JavaThreadStatus::RUNNABLE;
2251       break;
2252     case PARKED:
2253     case PINNED:
2254       status = JavaThreadStatus::PARKED;
2255       break;
2256     case TIMED_PARKED:
2257     case TIMED_PINNED:
2258       status = JavaThreadStatus::PARKED_TIMED;
2259       break;
2260     case BLOCKING:
2261     case BLOCKED:
2262       status = JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER;
2263       break;
2264     case WAIT:
2265       status = JavaThreadStatus::IN_OBJECT_WAIT;
2266       break;
2267     case TIMED_WAIT:
2268       status = JavaThreadStatus::IN_OBJECT_WAIT_TIMED;
2269       break;
2270     case TERMINATED:
2271       status = JavaThreadStatus::TERMINATED;
2272       break;
2273     default:
2274       ShouldNotReachHere();
2275   }
2276   return status;
2277 }
2278 
2279 ObjectMonitor* java_lang_VirtualThread::current_pending_monitor(oop vthread) {
2280   ObjectWaiter* waiter = objectWaiter(vthread);
2281   if (waiter != nullptr && waiter->at_monitorenter()) {
2282     return waiter->monitor();
2283   }
2284   return nullptr;
2285 }
2286 
2287 ObjectMonitor* java_lang_VirtualThread::current_waiting_monitor(oop vthread) {
2288   ObjectWaiter* waiter = objectWaiter(vthread);
2289   if (waiter != nullptr && waiter->is_wait()) {
2290     return waiter->monitor();
2291   }
2292   return nullptr;
2293 }
2294 
2295 bool java_lang_VirtualThread::is_preempted(oop vthread) {
2296   oop continuation = java_lang_VirtualThread::continuation(vthread);
2297   assert(continuation != nullptr, "vthread with no continuation");
2298   stackChunkOop chunk = jdk_internal_vm_Continuation::tail(continuation);
2299   return chunk != nullptr && chunk->preempted();
2300 }
2301 
2302 #if INCLUDE_CDS
2303 void java_lang_VirtualThread::serialize_offsets(SerializeClosure* f) {
2304    VTHREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2305    VTHREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
2306 }
2307 #endif
2308 
2309 // java_lang_Throwable
2310 
2311 int java_lang_Throwable::_backtrace_offset;
2312 int java_lang_Throwable::_detailMessage_offset;
2313 int java_lang_Throwable::_stackTrace_offset;
2314 int java_lang_Throwable::_depth_offset;
2315 int java_lang_Throwable::_cause_offset;
2316 int java_lang_Throwable::_static_unassigned_stacktrace_offset;
2317 
2318 #define THROWABLE_FIELDS_DO(macro) \
2319   macro(_backtrace_offset,     k, "backtrace",     object_signature,                  false); \
2320   macro(_detailMessage_offset, k, "detailMessage", string_signature,                  false); \
2321   macro(_stackTrace_offset,    k, "stackTrace",    java_lang_StackTraceElement_array, false); \
2322   macro(_depth_offset,         k, "depth",         int_signature,                     false); \
2323   macro(_cause_offset,         k, "cause",         throwable_signature,               false); \
2324   macro(_static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
2325 
2326 void java_lang_Throwable::compute_offsets() {
2327   InstanceKlass* k = vmClasses::Throwable_klass();
2328   THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2329 }
2330 
2331 #if INCLUDE_CDS
2332 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
2333   THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2334 }
2335 #endif
2336 
2337 oop java_lang_Throwable::unassigned_stacktrace() {
2338   InstanceKlass* ik = vmClasses::Throwable_klass();
2339   oop base = ik->static_field_base_raw();
2340   return base->obj_field(_static_unassigned_stacktrace_offset);
2341 }
2342 
2343 oop java_lang_Throwable::backtrace(oop throwable) {
2344   return throwable->obj_field_acquire(_backtrace_offset);
2345 }
2346 
2347 
2348 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
2349   throwable->release_obj_field_put(_backtrace_offset, value);
2350 }
2351 
2352 int java_lang_Throwable::depth(oop throwable) {
2353   return throwable->int_field(_depth_offset);
2354 }
2355 
2356 void java_lang_Throwable::set_depth(oop throwable, int value) {
2357   throwable->int_field_put(_depth_offset, value);
2358 }
2359 
2360 oop java_lang_Throwable::message(oop throwable) {
2361   return throwable->obj_field(_detailMessage_offset);
2362 }
2363 
2364 const char* java_lang_Throwable::message_as_utf8(oop throwable) {
2365   oop msg = java_lang_Throwable::message(throwable);
2366   const char* msg_utf8 = nullptr;
2367   if (msg != nullptr) {
2368     msg_utf8 = java_lang_String::as_utf8_string(msg);
2369   }
2370   return msg_utf8;
2371 }
2372 
2373 oop java_lang_Throwable::cause(oop throwable) {
2374   return throwable->obj_field(_cause_offset);
2375 }
2376 
2377 void java_lang_Throwable::set_message(oop throwable, oop value) {
2378   throwable->obj_field_put(_detailMessage_offset, value);
2379 }
2380 
2381 
2382 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
2383   throwable->obj_field_put(_stackTrace_offset, st_element_array);
2384 }
2385 
2386 void java_lang_Throwable::clear_stacktrace(oop throwable) {
2387   set_stacktrace(throwable, nullptr);
2388 }
2389 
2390 
2391 void java_lang_Throwable::print(oop throwable, outputStream* st) {
2392   ResourceMark rm;
2393   Klass* k = throwable->klass();
2394   assert(k != nullptr, "just checking");
2395   st->print("%s", k->external_name());
2396   oop msg = message(throwable);
2397   if (msg != nullptr) {
2398     st->print(": %s", java_lang_String::as_utf8_string(msg));
2399   }
2400 }
2401 
2402 // After this many redefines, the stack trace is unreliable.
2403 const int MAX_VERSION = USHRT_MAX;
2404 
2405 static inline bool version_matches(Method* method, int version) {
2406   assert(version < MAX_VERSION, "version is too big");
2407   return method != nullptr && (method->constants()->version() == version);
2408 }
2409 
2410 // This class provides a simple wrapper over the internal structure of
2411 // exception backtrace to insulate users of the backtrace from needing
2412 // to know what it looks like.
2413 // The code of this class is not GC safe. Allocations can only happen
2414 // in expand().
2415 class BacktraceBuilder: public StackObj {
2416  friend class BacktraceIterator;
2417  private:
2418   Handle          _backtrace;
2419   objArrayOop     _head;
2420   typeArrayOop    _methods;
2421   typeArrayOop    _bcis;
2422   objArrayOop     _mirrors;
2423   typeArrayOop    _names; // Needed to insulate method name against redefinition.
2424   // True if the top frame of the backtrace is omitted because it shall be hidden.
2425   bool            _has_hidden_top_frame;
2426   int             _index;
2427   NoSafepointVerifier _nsv;
2428 
2429   enum {
2430     trace_methods_offset = java_lang_Throwable::trace_methods_offset,
2431     trace_bcis_offset    = java_lang_Throwable::trace_bcis_offset,
2432     trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
2433     trace_names_offset   = java_lang_Throwable::trace_names_offset,
2434     trace_conts_offset   = java_lang_Throwable::trace_conts_offset,
2435     trace_next_offset    = java_lang_Throwable::trace_next_offset,
2436     trace_hidden_offset  = java_lang_Throwable::trace_hidden_offset,
2437     trace_size           = java_lang_Throwable::trace_size,
2438     trace_chunk_size     = java_lang_Throwable::trace_chunk_size
2439   };
2440 
2441   // get info out of chunks
2442   static typeArrayOop get_methods(objArrayHandle chunk) {
2443     typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
2444     assert(methods != nullptr, "method array should be initialized in backtrace");
2445     return methods;
2446   }
2447   static typeArrayOop get_bcis(objArrayHandle chunk) {
2448     typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
2449     assert(bcis != nullptr, "bci array should be initialized in backtrace");
2450     return bcis;
2451   }
2452   static objArrayOop get_mirrors(objArrayHandle chunk) {
2453     objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
2454     assert(mirrors != nullptr, "mirror array should be initialized in backtrace");
2455     return mirrors;
2456   }
2457   static typeArrayOop get_names(objArrayHandle chunk) {
2458     typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2459     assert(names != nullptr, "names array should be initialized in backtrace");
2460     return names;
2461   }
2462   static bool has_hidden_top_frame(objArrayHandle chunk) {
2463     oop hidden = chunk->obj_at(trace_hidden_offset);
2464     return hidden != nullptr;
2465   }
2466 
2467  public:
2468 
2469   // constructor for new backtrace
2470   BacktraceBuilder(TRAPS): _head(nullptr), _methods(nullptr), _bcis(nullptr), _mirrors(nullptr), _names(nullptr), _has_hidden_top_frame(false) {
2471     expand(CHECK);
2472     _backtrace = Handle(THREAD, _head);
2473     _index = 0;
2474   }
2475 
2476   BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2477     _methods = get_methods(backtrace);
2478     _bcis = get_bcis(backtrace);
2479     _mirrors = get_mirrors(backtrace);
2480     _names = get_names(backtrace);
2481     _has_hidden_top_frame = has_hidden_top_frame(backtrace);
2482     assert(_methods->length() == _bcis->length() &&
2483            _methods->length() == _mirrors->length() &&
2484            _mirrors->length() == _names->length(),
2485            "method and source information arrays should match");
2486 
2487     // head is the preallocated backtrace
2488     _head = backtrace();
2489     _backtrace = Handle(thread, _head);
2490     _index = 0;
2491   }
2492 
2493   void expand(TRAPS) {
2494     objArrayHandle old_head(THREAD, _head);
2495     PauseNoSafepointVerifier pnsv(&_nsv);
2496 
2497     objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2498     objArrayHandle new_head(THREAD, head);
2499 
2500     typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2501     typeArrayHandle new_methods(THREAD, methods);
2502 
2503     typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2504     typeArrayHandle new_bcis(THREAD, bcis);
2505 
2506     objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2507     objArrayHandle new_mirrors(THREAD, mirrors);
2508 
2509     typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2510     typeArrayHandle new_names(THREAD, names);
2511 
2512     if (!old_head.is_null()) {
2513       old_head->obj_at_put(trace_next_offset, new_head());
2514     }
2515     new_head->obj_at_put(trace_methods_offset, new_methods());
2516     new_head->obj_at_put(trace_bcis_offset, new_bcis());
2517     new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2518     new_head->obj_at_put(trace_names_offset, new_names());
2519     new_head->obj_at_put(trace_hidden_offset, nullptr);
2520 
2521     _head    = new_head();
2522     _methods = new_methods();
2523     _bcis = new_bcis();
2524     _mirrors = new_mirrors();
2525     _names  = new_names();
2526     _index = 0;
2527   }
2528 
2529   oop backtrace() {
2530     return _backtrace();
2531   }
2532 
2533   inline void push(Method* method, int bci, TRAPS) {
2534     // Smear the -1 bci to 0 since the array only holds unsigned
2535     // shorts.  The later line number lookup would just smear the -1
2536     // to a 0 even if it could be recorded.
2537     if (bci == SynchronizationEntryBCI) bci = 0;
2538 
2539     if (_index >= trace_chunk_size) {
2540       methodHandle mhandle(THREAD, method);
2541       expand(CHECK);
2542       method = mhandle();
2543     }
2544 
2545     _methods->ushort_at_put(_index, method->orig_method_idnum());
2546     _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2547 
2548     // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2549     // klass owning the symbols alive so their refcounts aren't decremented.
2550     Symbol* name = method->name();
2551     _names->symbol_at_put(_index, name);
2552 
2553     // We need to save the mirrors in the backtrace to keep the class
2554     // from being unloaded while we still have this stack trace.
2555     assert(method->method_holder()->java_mirror() != nullptr, "never push null for mirror");
2556     _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2557 
2558     _index++;
2559   }
2560 
2561   void set_has_hidden_top_frame() {
2562     if (!_has_hidden_top_frame) {
2563       // It would be nice to add java/lang/Boolean::TRUE here
2564       // to indicate that this backtrace has a hidden top frame.
2565       // But this code is used before TRUE is allocated.
2566       // Therefore let's just use an arbitrary legal oop
2567       // available right here. _methods is a short[].
2568       assert(_methods != nullptr, "we need a legal oop");
2569       _has_hidden_top_frame = true;
2570       _head->obj_at_put(trace_hidden_offset, _methods);
2571     }
2572   }
2573 };
2574 
2575 struct BacktraceElement : public StackObj {
2576   int _method_id;
2577   int _bci;
2578   int _version;
2579   Symbol* _name;
2580   Handle _mirror;
2581   BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2582                    _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2583 };
2584 
2585 class BacktraceIterator : public StackObj {
2586   int _index;
2587   objArrayHandle  _result;
2588   objArrayHandle  _mirrors;
2589   typeArrayHandle _methods;
2590   typeArrayHandle _bcis;
2591   typeArrayHandle _names;
2592 
2593   void init(objArrayHandle result, Thread* thread) {
2594     // Get method id, bci, version and mirror from chunk
2595     _result = result;
2596     if (_result.not_null()) {
2597       _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2598       _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2599       _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2600       _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2601       _index = 0;
2602     }
2603   }
2604  public:
2605   BacktraceIterator(objArrayHandle result, Thread* thread) {
2606     init(result, thread);
2607     assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2608   }
2609 
2610   BacktraceElement next(Thread* thread) {
2611     BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2612                         _methods->ushort_at(_index),
2613                         Backtrace::version_at(_bcis->int_at(_index)),
2614                         Backtrace::bci_at(_bcis->int_at(_index)),
2615                         _names->symbol_at(_index));
2616     _index++;
2617 
2618     if (_index >= java_lang_Throwable::trace_chunk_size) {
2619       int next_offset = java_lang_Throwable::trace_next_offset;
2620       // Get next chunk
2621       objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2622       init(result, thread);
2623     }
2624     return e;
2625   }
2626 
2627   bool repeat() {
2628     return _result.not_null() && _mirrors->obj_at(_index) != nullptr;
2629   }
2630 };
2631 
2632 
2633 // Print stack trace element to the specified output stream.
2634 // The output is formatted into a stringStream and written to the outputStream in one step.
2635 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2636                                           int version, int bci, Symbol* name) {
2637   ResourceMark rm;
2638   stringStream ss;
2639 
2640   InstanceKlass* holder = java_lang_Class::as_InstanceKlass(mirror());
2641   const char* klass_name  = holder->external_name();
2642   char* method_name = name->as_C_string();
2643   ss.print("\tat %s.%s(", klass_name, method_name);
2644 
2645   // Print module information
2646   ModuleEntry* module = holder->module();
2647   if (module->is_named()) {
2648     char* module_name = module->name()->as_C_string();
2649     if (module->version() != nullptr) {
2650       char* module_version = module->version()->as_C_string();
2651       ss.print("%s@%s/", module_name, module_version);
2652     } else {
2653       ss.print("%s/", module_name);
2654     }
2655   }
2656 
2657   char* source_file_name = nullptr;
2658   Symbol* source = Backtrace::get_source_file_name(holder, version);
2659   if (source != nullptr) {
2660     source_file_name = source->as_C_string();
2661   }
2662 
2663   // The method can be null if the requested class version is gone
2664   Method* method = holder->method_with_orig_idnum(method_id, version);
2665   if (!version_matches(method, version)) {
2666     ss.print("Redefined)");
2667   } else {
2668     int line_number = Backtrace::get_line_number(method, bci);
2669     if (line_number == -2) {
2670       ss.print("Native Method)");
2671     } else {
2672       if (source_file_name != nullptr && (line_number != -1)) {
2673         // Sourcename and linenumber
2674         ss.print("%s:%d)", source_file_name, line_number);
2675       } else if (source_file_name != nullptr) {
2676         // Just sourcename
2677         ss.print("%s)", source_file_name);
2678       } else {
2679         // Neither sourcename nor linenumber
2680         ss.print("Unknown Source)");
2681       }
2682       nmethod* nm = method->code();
2683       if (WizardMode && nm != nullptr) {
2684         ss.print("(nmethod " INTPTR_FORMAT ")", p2i(nm));
2685       }
2686     }
2687   }
2688 
2689   ss.cr();
2690   st->print_raw(ss.freeze(), ss.size());
2691 }
2692 
2693 void java_lang_Throwable::print_stack_element(outputStream *st, Method* method, int bci) {
2694   Handle mirror (Thread::current(),  method->method_holder()->java_mirror());
2695   int method_id = method->orig_method_idnum();
2696   int version = method->constants()->version();
2697   print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2698 }
2699 
2700 /**
2701  * Print the throwable message and its stack trace plus all causes by walking the
2702  * cause chain.  The output looks the same as of Throwable.printStackTrace().
2703  */
2704 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2705   // First, print the message.
2706   print(throwable(), st);
2707   st->cr();
2708 
2709   // Now print the stack trace.
2710   JavaThread* THREAD = JavaThread::current(); // For exception macros.
2711   while (throwable.not_null()) {
2712     objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2713     if (result.is_null()) {
2714       st->print_raw_cr("\t<<no stack trace available>>");
2715       return;
2716     }
2717     BacktraceIterator iter(result, THREAD);
2718 
2719     while (iter.repeat()) {
2720       BacktraceElement bte = iter.next(THREAD);
2721       print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2722     }
2723     if (THREAD->can_call_java()) {
2724       // Call getCause() which doesn't necessarily return the _cause field.
2725       ExceptionMark em(THREAD);
2726       JavaValue cause(T_OBJECT);
2727       JavaCalls::call_virtual(&cause,
2728                               throwable,
2729                               throwable->klass(),
2730                               vmSymbols::getCause_name(),
2731                               vmSymbols::void_throwable_signature(),
2732                               THREAD);
2733       // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2734       if (HAS_PENDING_EXCEPTION) {
2735         CLEAR_PENDING_EXCEPTION;
2736         throwable = Handle();
2737       } else {
2738         throwable = Handle(THREAD, cause.get_oop());
2739         if (throwable.not_null()) {
2740           st->print("Caused by: ");
2741           print(throwable(), st);
2742           st->cr();
2743         }
2744       }
2745     } else {
2746       st->print_raw_cr("<<cannot call Java to get cause>>");
2747       return;
2748     }
2749   }
2750 }
2751 
2752 /**
2753  * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2754  */
2755 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2756   assert(throwable->is_a(vmClasses::Throwable_klass()), "Throwable instance expected");
2757   JavaValue result(T_VOID);
2758   JavaCalls::call_virtual(&result,
2759                           throwable,
2760                           vmClasses::Throwable_klass(),
2761                           vmSymbols::printStackTrace_name(),
2762                           vmSymbols::void_method_signature(),
2763                           THREAD);
2764 }
2765 
2766 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2767   if (!StackTraceInThrowable) return;
2768   ResourceMark rm(THREAD);
2769 
2770   // Start out by clearing the backtrace for this object, in case the VM
2771   // runs out of memory while allocating the stack trace
2772   set_backtrace(throwable(), nullptr);
2773   // Clear lazily constructed Java level stacktrace if refilling occurs
2774   // This is unnecessary in 1.7+ but harmless
2775   clear_stacktrace(throwable());
2776 
2777   int max_depth = MaxJavaStackTraceDepth;
2778   JavaThread* thread = THREAD;
2779 
2780   BacktraceBuilder bt(CHECK);
2781 
2782   // If there is no Java frame just return the method that was being called
2783   // with bci 0
2784   if (!thread->has_last_Java_frame()) {
2785     if (max_depth >= 1 && method() != nullptr) {
2786       bt.push(method(), 0, CHECK);
2787       log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2788       set_depth(throwable(), 1);
2789       set_backtrace(throwable(), bt.backtrace());
2790     }
2791     return;
2792   }
2793 
2794   // Instead of using vframe directly, this version of fill_in_stack_trace
2795   // basically handles everything by hand. This significantly improved the
2796   // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2797   // See bug 6333838 for  more details.
2798   // The "ASSERT" here is to verify this method generates the exactly same stack
2799   // trace as utilizing vframe.
2800 #ifdef ASSERT
2801   vframeStream st(thread, false /* stop_at_java_call_stub */, false /* process_frames */);
2802 #endif
2803   int total_count = 0;
2804   RegisterMap map(thread,
2805                   RegisterMap::UpdateMap::skip,
2806                   RegisterMap::ProcessFrames::skip,
2807                   RegisterMap::WalkContinuation::include);
2808   int decode_offset = 0;
2809   nmethod* nm = nullptr;
2810   bool skip_fillInStackTrace_check = false;
2811   bool skip_throwableInit_check = false;
2812   bool skip_hidden = !ShowHiddenFrames;
2813   bool show_carrier = ShowCarrierFrames;
2814   ContinuationEntry* cont_entry = thread->last_continuation();
2815   for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2816     Method* method = nullptr;
2817     int bci = 0;
2818 
2819     // Compiled java method case.
2820     if (decode_offset != 0) {
2821       DebugInfoReadStream stream(nm, decode_offset);
2822       decode_offset = stream.read_int();
2823       method = (Method*)nm->metadata_at(stream.read_int());
2824       bci = stream.read_bci();
2825     } else {
2826       if (fr.is_first_frame()) break;
2827 
2828       if (Continuation::is_continuation_enterSpecial(fr)) {
2829         assert(cont_entry == Continuation::get_continuation_entry_for_entry_frame(thread, fr), "");
2830         if (!show_carrier && cont_entry->is_virtual_thread()) {
2831           break;
2832         }
2833         cont_entry = cont_entry->parent();
2834       }
2835 
2836       address pc = fr.pc();
2837       if (fr.is_interpreted_frame()) {
2838         address bcp;
2839         if (!map.in_cont()) {
2840           bcp = fr.interpreter_frame_bcp();
2841           method = fr.interpreter_frame_method();
2842         } else {
2843           bcp = map.stack_chunk()->interpreter_frame_bcp(fr);
2844           method = map.stack_chunk()->interpreter_frame_method(fr);
2845         }
2846         bci =  method->bci_from(bcp);
2847         fr = fr.sender(&map);
2848       } else {
2849         CodeBlob* cb = fr.cb();
2850         // HMMM QQQ might be nice to have frame return nm as null if cb is non-null
2851         // but non nmethod
2852         fr = fr.sender(&map);
2853         if (cb == nullptr || !cb->is_nmethod()) {
2854           continue;
2855         }
2856         nm = cb->as_nmethod();
2857         assert(nm->method() != nullptr, "must be");
2858         if (nm->method()->is_native()) {
2859           method = nm->method();
2860           bci = 0;
2861         } else {
2862           PcDesc* pd = nm->pc_desc_at(pc);
2863           decode_offset = pd->scope_decode_offset();
2864           // if decode_offset is not equal to 0, it will execute the
2865           // "compiled java method case" at the beginning of the loop.
2866           continue;
2867         }
2868       }
2869     }
2870 #ifdef ASSERT
2871     if (!st.at_end()) { // TODO LOOM remove once we show only vthread trace
2872       assert(st.method() == method && st.bci() == bci, "Wrong stack trace");
2873       st.next();
2874     }
2875 #endif
2876 
2877     // the format of the stacktrace will be:
2878     // - 1 or more fillInStackTrace frames for the exception class (skipped)
2879     // - 0 or more <init> methods for the exception class (skipped)
2880     // - rest of the stack
2881 
2882     if (!skip_fillInStackTrace_check) {
2883       if (method->name() == vmSymbols::fillInStackTrace_name() &&
2884           throwable->is_a(method->method_holder())) {
2885         continue;
2886       }
2887       else {
2888         skip_fillInStackTrace_check = true; // gone past them all
2889       }
2890     }
2891     if (!skip_throwableInit_check) {
2892       assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2893 
2894       // skip <init> methods of the exception class and superclasses
2895       // This is similar to classic VM.
2896       if (method->is_object_constructor() &&
2897           throwable->is_a(method->method_holder())) {
2898         continue;
2899       } else {
2900         // there are none or we've seen them all - either way stop checking
2901         skip_throwableInit_check = true;
2902       }
2903     }
2904     if (method->is_hidden() || method->is_continuation_enter_intrinsic()) {
2905       if (skip_hidden) {
2906         if (total_count == 0) {
2907           // The top frame will be hidden from the stack trace.
2908           bt.set_has_hidden_top_frame();
2909         }
2910         continue;
2911       }
2912     }
2913 
2914     bt.push(method, bci, CHECK);
2915     total_count++;
2916   }
2917 
2918   log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2919 
2920   // Put completed stack trace into throwable object
2921   set_backtrace(throwable(), bt.backtrace());
2922   set_depth(throwable(), total_count);
2923 }
2924 
2925 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2926   // No-op if stack trace is disabled
2927   if (!StackTraceInThrowable) {
2928     return;
2929   }
2930 
2931   // Disable stack traces for some preallocated out of memory errors
2932   if (!Universe::should_fill_in_stack_trace(throwable)) {
2933     return;
2934   }
2935 
2936   JavaThread* THREAD = JavaThread::current(); // For exception macros.
2937   PreserveExceptionMark pm(THREAD);
2938 
2939   fill_in_stack_trace(throwable, method, THREAD);
2940   // Ignore exceptions thrown during stack trace filling (OOM) and reinstall the
2941   // original exception via the PreserveExceptionMark destructor.
2942   CLEAR_PENDING_EXCEPTION;
2943 }
2944 
2945 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2946   // Allocate stack trace - backtrace is created but not filled in
2947 
2948   // No-op if stack trace is disabled
2949   if (!StackTraceInThrowable) return;
2950   BacktraceBuilder bt(CHECK);   // creates a backtrace
2951   set_backtrace(throwable(), bt.backtrace());
2952 }
2953 
2954 
2955 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2956   // Fill in stack trace into preallocated backtrace (no GC)
2957 
2958   // No-op if stack trace is disabled
2959   if (!StackTraceInThrowable) return;
2960 
2961   assert(throwable->is_a(vmClasses::Throwable_klass()), "sanity check");
2962 
2963   JavaThread* THREAD = JavaThread::current(); // For exception macros.
2964 
2965   objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2966   assert(backtrace.not_null(), "backtrace should have been preallocated");
2967 
2968   ResourceMark rm(THREAD);
2969   vframeStream st(THREAD, false /* stop_at_java_call_stub */, false /* process_frames */);
2970 
2971   BacktraceBuilder bt(THREAD, backtrace);
2972 
2973   // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2974   // methods as preallocated errors aren't created by "java" code.
2975 
2976   // fill in as much stack trace as possible
2977   int chunk_count = 0;
2978   for (;!st.at_end(); st.next()) {
2979     bt.push(st.method(), st.bci(), CHECK);
2980     chunk_count++;
2981 
2982     // Bail-out for deep stacks
2983     if (chunk_count >= trace_chunk_size) break;
2984   }
2985   set_depth(throwable(), chunk_count);
2986   log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2987 
2988   // We support the Throwable immutability protocol defined for Java 7.
2989   java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2990   assert(java_lang_Throwable::unassigned_stacktrace() != nullptr, "not initialized");
2991 }
2992 
2993 void java_lang_Throwable::get_stack_trace_elements(int depth, Handle backtrace,
2994                                                    objArrayHandle stack_trace_array_h, TRAPS) {
2995 
2996   if (backtrace.is_null() || stack_trace_array_h.is_null()) {
2997     THROW(vmSymbols::java_lang_NullPointerException());
2998   }
2999 
3000   assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
3001 
3002   if (stack_trace_array_h->length() != depth) {
3003     THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
3004   }
3005 
3006   objArrayHandle result(THREAD, objArrayOop(backtrace()));
3007   BacktraceIterator iter(result, THREAD);
3008 
3009   int index = 0;
3010   while (iter.repeat()) {
3011     BacktraceElement bte = iter.next(THREAD);
3012 
3013     Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
3014 
3015     if (stack_trace_element.is_null()) {
3016       THROW(vmSymbols::java_lang_NullPointerException());
3017     }
3018 
3019     InstanceKlass* holder = java_lang_Class::as_InstanceKlass(bte._mirror());
3020     methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
3021 
3022     java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
3023                                          method,
3024                                          bte._version,
3025                                          bte._bci,
3026                                          bte._name,
3027                                          CHECK);
3028   }
3029 }
3030 
3031 Handle java_lang_Throwable::create_initialization_error(JavaThread* current, Handle throwable) {
3032   // Creates an ExceptionInInitializerError to be recorded as the initialization error when class initialization
3033   // failed due to the passed in 'throwable'. We cannot save 'throwable' directly due to issues with keeping alive
3034   // all objects referenced via its stacktrace. So instead we save a new EIIE instance, with the same message and
3035   // symbolic stacktrace of 'throwable'.
3036   assert(throwable.not_null(), "shouldn't be");
3037 
3038   // Now create the message from the original exception and thread name.
3039   ResourceMark rm(current);
3040   const char *message = nullptr;
3041   oop detailed_message = java_lang_Throwable::message(throwable());
3042   if (detailed_message != nullptr) {
3043     message = java_lang_String::as_utf8_string(detailed_message);
3044   }
3045   stringStream st;
3046   st.print("Exception %s%s ", throwable()->klass()->name()->as_klass_external_name(),
3047              message == nullptr ? "" : ":");
3048   if (message == nullptr) {
3049     st.print("[in thread \"%s\"]", current->name());
3050   } else {
3051     st.print("%s [in thread \"%s\"]", message, current->name());
3052   }
3053 
3054   Symbol* exception_name = vmSymbols::java_lang_ExceptionInInitializerError();
3055   Handle init_error = Exceptions::new_exception(current, exception_name, st.as_string());
3056   // If new_exception returns a different exception while creating the exception,
3057   // abandon the attempt to save the initialization error and return null.
3058   if (init_error->klass()->name() != exception_name) {
3059     log_info(class, init)("Exception %s thrown while saving initialization exception",
3060                         init_error->klass()->external_name());
3061     return Handle();
3062   }
3063 
3064   // Call to java to fill in the stack trace and clear declaringClassObject to
3065   // not keep classes alive in the stack trace.
3066   // call this:  public StackTraceElement[] getStackTrace()
3067   JavaValue result(T_ARRAY);
3068   JavaCalls::call_virtual(&result, throwable,
3069                           vmClasses::Throwable_klass(),
3070                           vmSymbols::getStackTrace_name(),
3071                           vmSymbols::getStackTrace_signature(),
3072                           current);
3073   if (!current->has_pending_exception()){
3074     Handle stack_trace(current, result.get_oop());
3075     assert(stack_trace->is_objArray(), "Should be an array");
3076     java_lang_Throwable::set_stacktrace(init_error(), stack_trace());
3077     // Clear backtrace because the stacktrace should be used instead.
3078     set_backtrace(init_error(), nullptr);
3079   } else {
3080     log_info(class, init)("Exception thrown while getting stack trace for initialization exception %s",
3081                         init_error->klass()->external_name());
3082     current->clear_pending_exception();
3083   }
3084 
3085   return init_error;
3086 }
3087 
3088 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) {
3089   JavaThread* current = JavaThread::current();
3090   objArrayHandle result(current, objArrayOop(backtrace(throwable)));
3091   BacktraceIterator iter(result, current);
3092   // No backtrace available.
3093   if (!iter.repeat()) return false;
3094 
3095   // If the exception happened in a frame that has been hidden, i.e.,
3096   // omitted from the back trace, we can not compute the message.
3097   oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset);
3098   if (hidden != nullptr) {
3099     return false;
3100   }
3101 
3102   // Get first backtrace element.
3103   BacktraceElement bte = iter.next(current);
3104 
3105   InstanceKlass* holder = java_lang_Class::as_InstanceKlass(bte._mirror());
3106   assert(holder != nullptr, "first element should be non-null");
3107   Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version);
3108 
3109   // Original version is no longer available.
3110   if (m == nullptr || !version_matches(m, bte._version)) {
3111     return false;
3112   }
3113 
3114   *method = m;
3115   *bci = bte._bci;
3116   return true;
3117 }
3118 
3119 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
3120   // Allocate java.lang.StackTraceElement instance
3121   InstanceKlass* k = vmClasses::StackTraceElement_klass();
3122   assert(k != nullptr, "must be loaded in 1.4+");
3123   if (k->should_be_initialized()) {
3124     k->initialize(CHECK_NULL);
3125   }
3126 
3127   Handle element = k->allocate_instance_handle(CHECK_NULL);
3128 
3129   int version = method->constants()->version();
3130   fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_NULL);
3131   return element();
3132 }
3133 
3134 void java_lang_StackTraceElement::fill_in(Handle element,
3135                                           InstanceKlass* holder, const methodHandle& method,
3136                                           int version, int bci, Symbol* name, TRAPS) {
3137   assert(element->is_a(vmClasses::StackTraceElement_klass()), "sanity check");
3138 
3139   ResourceMark rm(THREAD);
3140   HandleMark hm(THREAD);
3141 
3142   // Fill in class name
3143   Handle java_class(THREAD, holder->java_mirror());
3144   oop classname = java_lang_Class::name(java_class, CHECK);
3145   java_lang_StackTraceElement::set_declaringClass(element(), classname);
3146   java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
3147 
3148   oop loader = holder->class_loader();
3149   if (loader != nullptr) {
3150     oop loader_name = java_lang_ClassLoader::name(loader);
3151     if (loader_name != nullptr)
3152       java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
3153   }
3154 
3155   // Fill in method name
3156   oop methodname = StringTable::intern(name, CHECK);
3157   java_lang_StackTraceElement::set_methodName(element(), methodname);
3158 
3159   // Fill in module name and version
3160   ModuleEntry* module = holder->module();
3161   if (module->is_named()) {
3162     oop module_name = StringTable::intern(module->name(), CHECK);
3163     java_lang_StackTraceElement::set_moduleName(element(), module_name);
3164     oop module_version;
3165     if (module->version() != nullptr) {
3166       module_version = StringTable::intern(module->version(), CHECK);
3167     } else {
3168       module_version = nullptr;
3169     }
3170     java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
3171   }
3172 
3173   if (method() == nullptr || !version_matches(method(), version)) {
3174     // The method was redefined, accurate line number information isn't available
3175     java_lang_StackTraceElement::set_fileName(element(), nullptr);
3176     java_lang_StackTraceElement::set_lineNumber(element(), -1);
3177   } else {
3178     Symbol* source;
3179     oop source_file;
3180     int line_number;
3181     decode_file_and_line(java_class, holder, version, method, bci, source, source_file, line_number, CHECK);
3182 
3183     java_lang_StackTraceElement::set_fileName(element(), source_file);
3184     java_lang_StackTraceElement::set_lineNumber(element(), line_number);
3185   }
3186 }
3187 
3188 void java_lang_StackTraceElement::decode_file_and_line(Handle java_class,
3189                                                        InstanceKlass* holder,
3190                                                        int version,
3191                                                        const methodHandle& method,
3192                                                        int bci,
3193                                                        Symbol*& source,
3194                                                        oop& source_file,
3195                                                        int& line_number, TRAPS) {
3196   // Fill in source file name and line number.
3197   source = Backtrace::get_source_file_name(holder, version);
3198   source_file = java_lang_Class::source_file(java_class());
3199   if (source != nullptr) {
3200     // Class was not redefined. We can trust its cache if set,
3201     // else we have to initialize it.
3202     if (source_file == nullptr) {
3203       source_file = StringTable::intern(source, CHECK);
3204       java_lang_Class::set_source_file(java_class(), source_file);
3205     }
3206   } else {
3207     // Class was redefined. Dump the cache if it was set.
3208     if (source_file != nullptr) {
3209       source_file = nullptr;
3210       java_lang_Class::set_source_file(java_class(), source_file);
3211     }
3212   }
3213   line_number = Backtrace::get_line_number(method(), bci);
3214 }
3215 
3216 #if INCLUDE_JVMCI
3217 void java_lang_StackTraceElement::decode(const methodHandle& method, int bci,
3218                                          Symbol*& filename, int& line_number, TRAPS) {
3219   ResourceMark rm(THREAD);
3220   HandleMark hm(THREAD);
3221 
3222   filename = nullptr;
3223   line_number = -1;
3224 
3225   oop source_file;
3226   int version = method->constants()->version();
3227   InstanceKlass* holder = method->method_holder();
3228   Handle java_class(THREAD, holder->java_mirror());
3229   decode_file_and_line(java_class, holder, version, method, bci, filename, source_file, line_number, CHECK);
3230 }
3231 #endif // INCLUDE_JVMCI
3232 
3233 // java_lang_ClassFrameInfo
3234 
3235 int java_lang_ClassFrameInfo::_classOrMemberName_offset;
3236 int java_lang_ClassFrameInfo::_flags_offset;
3237 
3238 #define CLASSFRAMEINFO_FIELDS_DO(macro) \
3239   macro(_classOrMemberName_offset, k, "classOrMemberName", object_signature,  false); \
3240   macro(_flags_offset,             k, vmSymbols::flags_name(), int_signature, false)
3241 
3242 void java_lang_ClassFrameInfo::compute_offsets() {
3243   InstanceKlass* k = vmClasses::ClassFrameInfo_klass();
3244   CLASSFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3245 }
3246 
3247 #if INCLUDE_CDS
3248 void java_lang_ClassFrameInfo::serialize_offsets(SerializeClosure* f) {
3249   CLASSFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3250 }
3251 #endif
3252 
3253 static int get_flags(const methodHandle& m) {
3254   int flags = m->access_flags().as_method_flags();
3255   if (m->is_object_constructor()) {
3256     flags |= java_lang_invoke_MemberName::MN_IS_OBJECT_CONSTRUCTOR;
3257   } else {
3258     // Note: Static initializers can be here. Record them as plain methods.
3259     flags |= java_lang_invoke_MemberName::MN_IS_METHOD;
3260   }
3261   if (m->caller_sensitive()) {
3262     flags |= java_lang_invoke_MemberName::MN_CALLER_SENSITIVE;
3263   }
3264   if (m->is_hidden()) {
3265     flags |= java_lang_invoke_MemberName::MN_HIDDEN_MEMBER;
3266   }
3267   assert((flags & 0xFF000000) == 0, "unexpected flags");
3268   return flags;
3269 }
3270 
3271 oop java_lang_ClassFrameInfo::classOrMemberName(oop obj) {
3272   return obj->obj_field(_classOrMemberName_offset);
3273 }
3274 
3275 int java_lang_ClassFrameInfo::flags(oop obj) {
3276   return obj->int_field(_flags_offset);
3277 }
3278 
3279 void java_lang_ClassFrameInfo::init_class(Handle stackFrame, const methodHandle& m) {
3280   stackFrame->obj_field_put(_classOrMemberName_offset, m->method_holder()->java_mirror());
3281   // flags is initialized when ClassFrameInfo object is constructed and retain the value
3282   int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3283   stackFrame->int_field_put(_flags_offset, flags);
3284 }
3285 
3286 void java_lang_ClassFrameInfo::init_method(Handle stackFrame, const methodHandle& m, TRAPS) {
3287   oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(m, CHECK);
3288   stackFrame->obj_field_put(_classOrMemberName_offset, rmethod_name);
3289   // flags is initialized when ClassFrameInfo object is constructed and retain the value
3290   int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3291   stackFrame->int_field_put(_flags_offset, flags);
3292 }
3293 
3294 
3295 // java_lang_StackFrameInfo
3296 
3297 int java_lang_StackFrameInfo::_type_offset;
3298 int java_lang_StackFrameInfo::_name_offset;
3299 int java_lang_StackFrameInfo::_bci_offset;
3300 int java_lang_StackFrameInfo::_version_offset;
3301 int java_lang_StackFrameInfo::_contScope_offset;
3302 
3303 #define STACKFRAMEINFO_FIELDS_DO(macro) \
3304   macro(_type_offset,       k, "type",       object_signature,            false); \
3305   macro(_name_offset,       k, "name",       string_signature,            false); \
3306   macro(_bci_offset,        k, "bci",        int_signature,               false); \
3307   macro(_contScope_offset,  k, "contScope",  continuationscope_signature, false)
3308 
3309 void java_lang_StackFrameInfo::compute_offsets() {
3310   InstanceKlass* k = vmClasses::StackFrameInfo_klass();
3311   STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3312   STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3313 }
3314 
3315 #if INCLUDE_CDS
3316 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
3317   STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3318   STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3319 }
3320 #endif
3321 
3322 Method* java_lang_StackFrameInfo::get_method(oop obj) {
3323   oop m = java_lang_ClassFrameInfo::classOrMemberName(obj);
3324   Method* method = java_lang_invoke_ResolvedMethodName::vmtarget(m);
3325   return method;
3326 }
3327 
3328 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS) {
3329   // set Method* or mid/cpref
3330   HandleMark hm(THREAD);
3331   Handle cont_h(THREAD, cont);
3332   java_lang_ClassFrameInfo::init_method(stackFrame, method, CHECK);
3333 
3334   // set bci
3335   java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
3336   // method may be redefined; store the version
3337   int version = method->constants()->version();
3338   assert((jushort)version == version, "version should be short");
3339   java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
3340 
3341   oop contScope = cont_h() != nullptr ? jdk_internal_vm_Continuation::scope(cont_h()) : (oop)nullptr;
3342   java_lang_StackFrameInfo::set_contScope(stackFrame(), contScope);
3343 }
3344 
3345 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
3346   ResourceMark rm(THREAD);
3347   HandleMark hm(THREAD);
3348 
3349   Method* method = java_lang_StackFrameInfo::get_method(stackFrame());
3350   InstanceKlass* holder = method->method_holder();
3351   short version = stackFrame->short_field(_version_offset);
3352   int bci = stackFrame->int_field(_bci_offset);
3353   Symbol* name = method->name();
3354   java_lang_StackTraceElement::fill_in(stack_trace_element, holder, methodHandle(THREAD, method), version, bci, name, CHECK);
3355 }
3356 
3357 oop java_lang_StackFrameInfo::type(oop obj) {
3358   return obj->obj_field(_type_offset);
3359 }
3360 
3361 void java_lang_StackFrameInfo::set_type(oop obj, oop value) {
3362   obj->obj_field_put(_type_offset, value);
3363 }
3364 
3365 oop java_lang_StackFrameInfo::name(oop obj) {
3366   return obj->obj_field(_name_offset);
3367 }
3368 
3369 void java_lang_StackFrameInfo::set_name(oop obj, oop value) {
3370   obj->obj_field_put(_name_offset, value);
3371 }
3372 
3373 void java_lang_StackFrameInfo::set_version(oop obj, short value) {
3374   obj->short_field_put(_version_offset, value);
3375 }
3376 
3377 void java_lang_StackFrameInfo::set_bci(oop obj, int value) {
3378   assert(value >= 0 && value < max_jushort, "must be a valid bci value");
3379   obj->int_field_put(_bci_offset, value);
3380 }
3381 
3382 void java_lang_StackFrameInfo::set_contScope(oop obj, oop value) {
3383   obj->obj_field_put(_contScope_offset, value);
3384 }
3385 
3386 int java_lang_LiveStackFrameInfo::_monitors_offset;
3387 int java_lang_LiveStackFrameInfo::_locals_offset;
3388 int java_lang_LiveStackFrameInfo::_operands_offset;
3389 int java_lang_LiveStackFrameInfo::_mode_offset;
3390 
3391 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
3392   macro(_monitors_offset,   k, "monitors",    object_array_signature, false); \
3393   macro(_locals_offset,     k, "locals",      object_array_signature, false); \
3394   macro(_operands_offset,   k, "operands",    object_array_signature, false); \
3395   macro(_mode_offset,       k, "mode",        int_signature,          false)
3396 
3397 void java_lang_LiveStackFrameInfo::compute_offsets() {
3398   InstanceKlass* k = vmClasses::LiveStackFrameInfo_klass();
3399   LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3400 }
3401 
3402 #if INCLUDE_CDS
3403 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
3404   LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3405 }
3406 #endif
3407 
3408 void java_lang_LiveStackFrameInfo::set_monitors(oop obj, oop value) {
3409   obj->obj_field_put(_monitors_offset, value);
3410 }
3411 
3412 void java_lang_LiveStackFrameInfo::set_locals(oop obj, oop value) {
3413   obj->obj_field_put(_locals_offset, value);
3414 }
3415 
3416 void java_lang_LiveStackFrameInfo::set_operands(oop obj, oop value) {
3417   obj->obj_field_put(_operands_offset, value);
3418 }
3419 
3420 void java_lang_LiveStackFrameInfo::set_mode(oop obj, int value) {
3421   obj->int_field_put(_mode_offset, value);
3422 }
3423 
3424 
3425 // java_lang_AccessibleObject
3426 
3427 int java_lang_reflect_AccessibleObject::_override_offset;
3428 
3429 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
3430   macro(_override_offset, k, "override", bool_signature, false)
3431 
3432 void java_lang_reflect_AccessibleObject::compute_offsets() {
3433   InstanceKlass* k = vmClasses::reflect_AccessibleObject_klass();
3434   ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3435 }
3436 
3437 #if INCLUDE_CDS
3438 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
3439   ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3440 }
3441 #endif
3442 
3443 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
3444   return (jboolean) reflect->bool_field(_override_offset);
3445 }
3446 
3447 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
3448   reflect->bool_field_put(_override_offset, (int) value);
3449 }
3450 
3451 // java_lang_reflect_Method
3452 
3453 int java_lang_reflect_Method::_clazz_offset;
3454 int java_lang_reflect_Method::_name_offset;
3455 int java_lang_reflect_Method::_returnType_offset;
3456 int java_lang_reflect_Method::_parameterTypes_offset;
3457 int java_lang_reflect_Method::_exceptionTypes_offset;
3458 int java_lang_reflect_Method::_slot_offset;
3459 int java_lang_reflect_Method::_modifiers_offset;
3460 int java_lang_reflect_Method::_signature_offset;
3461 int java_lang_reflect_Method::_annotations_offset;
3462 int java_lang_reflect_Method::_parameter_annotations_offset;
3463 int java_lang_reflect_Method::_annotation_default_offset;
3464 
3465 #define METHOD_FIELDS_DO(macro) \
3466   macro(_clazz_offset,          k, vmSymbols::clazz_name(),          class_signature,       false); \
3467   macro(_name_offset,           k, vmSymbols::name_name(),           string_signature,      false); \
3468   macro(_returnType_offset,     k, vmSymbols::returnType_name(),     class_signature,       false); \
3469   macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3470   macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3471   macro(_slot_offset,           k, vmSymbols::slot_name(),           int_signature,         false); \
3472   macro(_modifiers_offset,      k, vmSymbols::modifiers_name(),      int_signature,         false); \
3473   macro(_signature_offset,             k, vmSymbols::signature_name(),             string_signature,     false); \
3474   macro(_annotations_offset,           k, vmSymbols::annotations_name(),           byte_array_signature, false); \
3475   macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
3476   macro(_annotation_default_offset,    k, vmSymbols::annotation_default_name(),    byte_array_signature, false);
3477 
3478 void java_lang_reflect_Method::compute_offsets() {
3479   InstanceKlass* k = vmClasses::reflect_Method_klass();
3480   METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3481 }
3482 
3483 #if INCLUDE_CDS
3484 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
3485   METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3486 }
3487 #endif
3488 
3489 Handle java_lang_reflect_Method::create(TRAPS) {
3490   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3491   InstanceKlass* klass = vmClasses::reflect_Method_klass();
3492   // This class is eagerly initialized during VM initialization, since we keep a reference
3493   // to one of the methods
3494   assert(klass->is_initialized(), "must be initialized");
3495   return klass->allocate_instance_handle(THREAD);
3496 }
3497 
3498 oop java_lang_reflect_Method::clazz(oop reflect) {
3499   return reflect->obj_field(_clazz_offset);
3500 }
3501 
3502 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
3503    reflect->obj_field_put(_clazz_offset, value);
3504 }
3505 
3506 int java_lang_reflect_Method::slot(oop reflect) {
3507   return reflect->int_field(_slot_offset);
3508 }
3509 
3510 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
3511   reflect->int_field_put(_slot_offset, value);
3512 }
3513 
3514 void java_lang_reflect_Method::set_name(oop method, oop value) {
3515   method->obj_field_put(_name_offset, value);
3516 }
3517 
3518 oop java_lang_reflect_Method::return_type(oop method) {
3519   return method->obj_field(_returnType_offset);
3520 }
3521 
3522 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
3523   method->obj_field_put(_returnType_offset, value);
3524 }
3525 
3526 oop java_lang_reflect_Method::parameter_types(oop method) {
3527   return method->obj_field(_parameterTypes_offset);
3528 }
3529 
3530 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
3531   method->obj_field_put(_parameterTypes_offset, value);
3532 }
3533 
3534 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
3535   method->obj_field_put(_exceptionTypes_offset, value);
3536 }
3537 
3538 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
3539   method->int_field_put(_modifiers_offset, value);
3540 }
3541 
3542 void java_lang_reflect_Method::set_signature(oop method, oop value) {
3543   method->obj_field_put(_signature_offset, value);
3544 }
3545 
3546 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
3547   method->obj_field_put(_annotations_offset, value);
3548 }
3549 
3550 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
3551   method->obj_field_put(_parameter_annotations_offset, value);
3552 }
3553 
3554 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
3555   method->obj_field_put(_annotation_default_offset, value);
3556 }
3557 
3558 int java_lang_reflect_Constructor::_clazz_offset;
3559 int java_lang_reflect_Constructor::_parameterTypes_offset;
3560 int java_lang_reflect_Constructor::_exceptionTypes_offset;
3561 int java_lang_reflect_Constructor::_slot_offset;
3562 int java_lang_reflect_Constructor::_modifiers_offset;
3563 int java_lang_reflect_Constructor::_signature_offset;
3564 int java_lang_reflect_Constructor::_annotations_offset;
3565 int java_lang_reflect_Constructor::_parameter_annotations_offset;
3566 
3567 #define CONSTRUCTOR_FIELDS_DO(macro) \
3568   macro(_clazz_offset,          k, vmSymbols::clazz_name(),          class_signature,       false); \
3569   macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3570   macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3571   macro(_slot_offset,           k, vmSymbols::slot_name(),           int_signature,         false); \
3572   macro(_modifiers_offset,      k, vmSymbols::modifiers_name(),      int_signature,         false); \
3573   macro(_signature_offset,             k, vmSymbols::signature_name(),             string_signature,     false); \
3574   macro(_annotations_offset,           k, vmSymbols::annotations_name(),           byte_array_signature, false); \
3575   macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
3576 
3577 void java_lang_reflect_Constructor::compute_offsets() {
3578   InstanceKlass* k = vmClasses::reflect_Constructor_klass();
3579   CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3580 }
3581 
3582 #if INCLUDE_CDS
3583 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
3584   CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3585 }
3586 #endif
3587 
3588 Handle java_lang_reflect_Constructor::create(TRAPS) {
3589   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3590   Symbol* name = vmSymbols::java_lang_reflect_Constructor();
3591   Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3592   InstanceKlass* ik = InstanceKlass::cast(k);
3593   // Ensure it is initialized
3594   ik->initialize(CHECK_NH);
3595   return ik->allocate_instance_handle(THREAD);
3596 }
3597 
3598 oop java_lang_reflect_Constructor::clazz(oop reflect) {
3599   return reflect->obj_field(_clazz_offset);
3600 }
3601 
3602 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
3603    reflect->obj_field_put(_clazz_offset, value);
3604 }
3605 
3606 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
3607   return constructor->obj_field(_parameterTypes_offset);
3608 }
3609 
3610 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
3611   constructor->obj_field_put(_parameterTypes_offset, value);
3612 }
3613 
3614 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
3615   constructor->obj_field_put(_exceptionTypes_offset, value);
3616 }
3617 
3618 int java_lang_reflect_Constructor::slot(oop reflect) {
3619   return reflect->int_field(_slot_offset);
3620 }
3621 
3622 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
3623   reflect->int_field_put(_slot_offset, value);
3624 }
3625 
3626 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
3627   constructor->int_field_put(_modifiers_offset, value);
3628 }
3629 
3630 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
3631   constructor->obj_field_put(_signature_offset, value);
3632 }
3633 
3634 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
3635   constructor->obj_field_put(_annotations_offset, value);
3636 }
3637 
3638 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
3639   method->obj_field_put(_parameter_annotations_offset, value);
3640 }
3641 
3642 int java_lang_reflect_Field::_clazz_offset;
3643 int java_lang_reflect_Field::_name_offset;
3644 int java_lang_reflect_Field::_type_offset;
3645 int java_lang_reflect_Field::_slot_offset;
3646 int java_lang_reflect_Field::_modifiers_offset;
3647 int java_lang_reflect_Field::_flags_offset;
3648 int java_lang_reflect_Field::_signature_offset;
3649 int java_lang_reflect_Field::_annotations_offset;
3650 
3651 #define FIELD_FIELDS_DO(macro) \
3652   macro(_clazz_offset,     k, vmSymbols::clazz_name(),     class_signature,  false); \
3653   macro(_name_offset,      k, vmSymbols::name_name(),      string_signature, false); \
3654   macro(_type_offset,      k, vmSymbols::type_name(),      class_signature,  false); \
3655   macro(_slot_offset,      k, vmSymbols::slot_name(),      int_signature,    false); \
3656   macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature,    false); \
3657   macro(_flags_offset,     k, vmSymbols::flags_name(),     int_signature,    false); \
3658   macro(_signature_offset,        k, vmSymbols::signature_name(),        string_signature,     false); \
3659   macro(_annotations_offset,      k, vmSymbols::annotations_name(),      byte_array_signature, false);
3660 
3661 void java_lang_reflect_Field::compute_offsets() {
3662   InstanceKlass* k = vmClasses::reflect_Field_klass();
3663   FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3664 }
3665 
3666 #if INCLUDE_CDS
3667 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
3668   FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3669 }
3670 #endif
3671 
3672 Handle java_lang_reflect_Field::create(TRAPS) {
3673   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3674   Symbol* name = vmSymbols::java_lang_reflect_Field();
3675   Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3676   InstanceKlass* ik = InstanceKlass::cast(k);
3677   // Ensure it is initialized
3678   ik->initialize(CHECK_NH);
3679   return ik->allocate_instance_handle(THREAD);
3680 }
3681 
3682 oop java_lang_reflect_Field::clazz(oop reflect) {
3683   return reflect->obj_field(_clazz_offset);
3684 }
3685 
3686 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
3687   reflect->obj_field_put(_clazz_offset, value);
3688 }
3689 
3690 oop java_lang_reflect_Field::name(oop field) {
3691   return field->obj_field(_name_offset);
3692 }
3693 
3694 void java_lang_reflect_Field::set_name(oop field, oop value) {
3695   field->obj_field_put(_name_offset, value);
3696 }
3697 
3698 oop java_lang_reflect_Field::type(oop field) {
3699   return field->obj_field(_type_offset);
3700 }
3701 
3702 void java_lang_reflect_Field::set_type(oop field, oop value) {
3703   field->obj_field_put(_type_offset, value);
3704 }
3705 
3706 int java_lang_reflect_Field::slot(oop reflect) {
3707   return reflect->int_field(_slot_offset);
3708 }
3709 
3710 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
3711   reflect->int_field_put(_slot_offset, value);
3712 }
3713 
3714 int java_lang_reflect_Field::modifiers(oop field) {
3715   return field->int_field(_modifiers_offset);
3716 }
3717 
3718 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
3719   field->int_field_put(_modifiers_offset, value);
3720 }
3721 
3722 void java_lang_reflect_Field::set_flags(oop field, int value) {
3723   field->int_field_put(_flags_offset, value);
3724 }
3725 
3726 void java_lang_reflect_Field::set_signature(oop field, oop value) {
3727   field->obj_field_put(_signature_offset, value);
3728 }
3729 
3730 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
3731   field->obj_field_put(_annotations_offset, value);
3732 }
3733 
3734 oop java_lang_reflect_RecordComponent::create(InstanceKlass* holder, RecordComponent* component, TRAPS) {
3735   // Allocate java.lang.reflect.RecordComponent instance
3736   HandleMark hm(THREAD);
3737   InstanceKlass* ik = vmClasses::RecordComponent_klass();
3738   assert(ik != nullptr, "must be loaded");
3739   ik->initialize(CHECK_NULL);
3740 
3741   Handle element = ik->allocate_instance_handle(CHECK_NULL);
3742 
3743   Handle decl_class(THREAD, holder->java_mirror());
3744   java_lang_reflect_RecordComponent::set_clazz(element(), decl_class());
3745 
3746   Symbol* name = holder->constants()->symbol_at(component->name_index()); // name_index is a utf8
3747   oop component_name = StringTable::intern(name, CHECK_NULL);
3748   java_lang_reflect_RecordComponent::set_name(element(), component_name);
3749 
3750   Symbol* type = holder->constants()->symbol_at(component->descriptor_index());
3751   Handle component_type_h =
3752     SystemDictionary::find_java_mirror_for_type(type, holder, SignatureStream::NCDFError, CHECK_NULL);
3753   java_lang_reflect_RecordComponent::set_type(element(), component_type_h());
3754 
3755   Method* accessor_method = nullptr;
3756   {
3757     // Prepend "()" to type to create the full method signature.
3758     ResourceMark rm(THREAD);
3759     int sig_len = type->utf8_length() + 3; // "()" and null char
3760     char* sig = NEW_RESOURCE_ARRAY(char, sig_len);
3761     jio_snprintf(sig, sig_len, "%c%c%s", JVM_SIGNATURE_FUNC, JVM_SIGNATURE_ENDFUNC, type->as_C_string());
3762     TempNewSymbol full_sig = SymbolTable::new_symbol(sig);
3763     accessor_method = holder->find_instance_method(name, full_sig, Klass::PrivateLookupMode::find);
3764   }
3765 
3766   if (accessor_method != nullptr) {
3767     methodHandle method(THREAD, accessor_method);
3768     oop m = Reflection::new_method(method, false, CHECK_NULL);
3769     java_lang_reflect_RecordComponent::set_accessor(element(), m);
3770   } else {
3771     java_lang_reflect_RecordComponent::set_accessor(element(), nullptr);
3772   }
3773 
3774   int sig_index = component->generic_signature_index();
3775   if (sig_index > 0) {
3776     Symbol* sig = holder->constants()->symbol_at(sig_index); // sig_index is a utf8
3777     oop component_sig = StringTable::intern(sig, CHECK_NULL);
3778     java_lang_reflect_RecordComponent::set_signature(element(), component_sig);
3779   } else {
3780     java_lang_reflect_RecordComponent::set_signature(element(), nullptr);
3781   }
3782 
3783   typeArrayOop annotation_oop = Annotations::make_java_array(component->annotations(), CHECK_NULL);
3784   java_lang_reflect_RecordComponent::set_annotations(element(), annotation_oop);
3785 
3786   typeArrayOop type_annotation_oop = Annotations::make_java_array(component->type_annotations(), CHECK_NULL);
3787   java_lang_reflect_RecordComponent::set_typeAnnotations(element(), type_annotation_oop);
3788 
3789   return element();
3790 }
3791 
3792 int reflect_ConstantPool::_vmholder_offset;
3793 
3794 void reflect_ConstantPool::compute_offsets() {
3795   InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3796   // The field is injected and called Object vmholder in the jdk.internal.reflect.ConstantPool class.
3797   CONSTANTPOOL_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3798 }
3799 
3800 #if INCLUDE_CDS
3801 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3802   CONSTANTPOOL_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3803 }
3804 #endif
3805 
3806 int java_lang_reflect_Parameter::_name_offset;
3807 int java_lang_reflect_Parameter::_modifiers_offset;
3808 int java_lang_reflect_Parameter::_index_offset;
3809 int java_lang_reflect_Parameter::_executable_offset;
3810 
3811 #define PARAMETER_FIELDS_DO(macro) \
3812   macro(_name_offset,        k, vmSymbols::name_name(),        string_signature, false); \
3813   macro(_modifiers_offset,   k, vmSymbols::modifiers_name(),   int_signature,    false); \
3814   macro(_index_offset,       k, vmSymbols::index_name(),       int_signature,    false); \
3815   macro(_executable_offset,  k, vmSymbols::executable_name(),  executable_signature, false)
3816 
3817 void java_lang_reflect_Parameter::compute_offsets() {
3818   InstanceKlass* k = vmClasses::reflect_Parameter_klass();
3819   PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3820 }
3821 
3822 #if INCLUDE_CDS
3823 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3824   PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3825 }
3826 #endif
3827 
3828 Handle java_lang_reflect_Parameter::create(TRAPS) {
3829   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3830   Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3831   Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3832   InstanceKlass* ik = InstanceKlass::cast(k);
3833   // Ensure it is initialized
3834   ik->initialize(CHECK_NH);
3835   return ik->allocate_instance_handle(THREAD);
3836 }
3837 
3838 oop java_lang_reflect_Parameter::name(oop param) {
3839   return param->obj_field(_name_offset);
3840 }
3841 
3842 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3843   param->obj_field_put(_name_offset, value);
3844 }
3845 
3846 int java_lang_reflect_Parameter::modifiers(oop param) {
3847   return param->int_field(_modifiers_offset);
3848 }
3849 
3850 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3851   param->int_field_put(_modifiers_offset, value);
3852 }
3853 
3854 int java_lang_reflect_Parameter::index(oop param) {
3855   return param->int_field(_index_offset);
3856 }
3857 
3858 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3859   param->int_field_put(_index_offset, value);
3860 }
3861 
3862 oop java_lang_reflect_Parameter::executable(oop param) {
3863   return param->obj_field(_executable_offset);
3864 }
3865 
3866 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3867   param->obj_field_put(_executable_offset, value);
3868 }
3869 
3870 // java_lang_Module
3871 
3872 int java_lang_Module::_loader_offset;
3873 int java_lang_Module::_name_offset;
3874 int java_lang_Module::_module_entry_offset;
3875 
3876 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3877   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3878   return JavaCalls::construct_new_instance(vmClasses::Module_klass(),
3879                           vmSymbols::java_lang_module_init_signature(),
3880                           loader, module_name, CHECK_NH);
3881 }
3882 
3883 #define MODULE_FIELDS_DO(macro) \
3884   macro(_loader_offset,  k, vmSymbols::loader_name(),  classloader_signature, false); \
3885   macro(_name_offset,    k, vmSymbols::name_name(),    string_signature,      false)
3886 
3887 void java_lang_Module::compute_offsets() {
3888   InstanceKlass* k = vmClasses::Module_klass();
3889   MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3890   MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3891 }
3892 
3893 #if INCLUDE_CDS
3894 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3895   MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3896   MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3897 }
3898 #endif
3899 
3900 oop java_lang_Module::loader(oop module) {
3901   return module->obj_field(_loader_offset);
3902 }
3903 
3904 void java_lang_Module::set_loader(oop module, oop value) {
3905   module->obj_field_put(_loader_offset, value);
3906 }
3907 
3908 oop java_lang_Module::name(oop module) {
3909   return module->obj_field(_name_offset);
3910 }
3911 
3912 void java_lang_Module::set_name(oop module, oop value) {
3913   module->obj_field_put(_name_offset, value);
3914 }
3915 
3916 ModuleEntry* java_lang_Module::module_entry_raw(oop module) {
3917   assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3918   assert(module != nullptr, "module can't be null");
3919   assert(oopDesc::is_oop(module), "module must be oop");
3920 
3921   ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3922   return module_entry;
3923 }
3924 
3925 ModuleEntry* java_lang_Module::module_entry(oop module) {
3926   ModuleEntry* module_entry = module_entry_raw(module);
3927   if (module_entry == nullptr) {
3928     // If the inject field containing the ModuleEntry* is null then return the
3929     // class loader's unnamed module.
3930     oop loader = java_lang_Module::loader(module);
3931     Handle h_loader = Handle(Thread::current(), loader);
3932     ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3933     return loader_cld->unnamed_module();
3934   }
3935   return module_entry;
3936 }
3937 
3938 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3939   assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3940   assert(module != nullptr, "module can't be null");
3941   assert(oopDesc::is_oop(module), "module must be oop");
3942   module->address_field_put(_module_entry_offset, (address)module_entry);
3943 }
3944 
3945 Handle reflect_ConstantPool::create(TRAPS) {
3946   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3947   InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3948   // Ensure it is initialized
3949   k->initialize(CHECK_NH);
3950   return k->allocate_instance_handle(THREAD);
3951 }
3952 
3953 
3954 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3955   assert(_vmholder_offset != 0, "Uninitialized vmholder");
3956   oop mirror = value->pool_holder()->java_mirror();
3957   // Save the mirror to get back the constant pool.
3958   reflect->obj_field_put(_vmholder_offset, mirror);
3959 }
3960 
3961 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3962   assert(_vmholder_offset != 0, "Uninitialized vmholder");
3963   oop mirror = reflect->obj_field(_vmholder_offset);
3964   InstanceKlass* ik = java_lang_Class::as_InstanceKlass(mirror);
3965 
3966   // Get the constant pool back from the klass.  Since class redefinition
3967   // merges the new constant pool into the old, this is essentially the
3968   // same constant pool as the original.  If constant pool merging is
3969   // no longer done in the future, this will have to change to save
3970   // the original.
3971   return ik->constants();
3972 }
3973 
3974 
3975 // Support for java_lang_ref_Reference
3976 
3977 bool java_lang_ref_Reference::_offsets_initialized;
3978 
3979 int java_lang_ref_Reference::_referent_offset;
3980 int java_lang_ref_Reference::_queue_offset;
3981 int java_lang_ref_Reference::_next_offset;
3982 int java_lang_ref_Reference::_discovered_offset;
3983 
3984 #define REFERENCE_FIELDS_DO(macro) \
3985   macro(_referent_offset,   k, "referent", object_signature, false); \
3986   macro(_queue_offset,      k, "queue", referencequeue_signature, false); \
3987   macro(_next_offset,       k, "next", reference_signature, false); \
3988   macro(_discovered_offset, k, "discovered", reference_signature, false);
3989 
3990 void java_lang_ref_Reference::compute_offsets() {
3991   if (_offsets_initialized) {
3992     return;
3993   }
3994   _offsets_initialized = true;
3995   InstanceKlass* k = vmClasses::Reference_klass();
3996   REFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3997 }
3998 
3999 #if INCLUDE_CDS
4000 void java_lang_ref_Reference::serialize_offsets(SerializeClosure* f) {
4001   f->do_bool(&_offsets_initialized);
4002   REFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4003 }
4004 #endif
4005 
4006 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
4007   assert(obj != nullptr, "sanity");
4008   if (offset != _referent_offset) {
4009     return false;
4010   }
4011 
4012   Klass* k = obj->klass();
4013   if (!k->is_instance_klass()) {
4014     return false;
4015   }
4016 
4017   InstanceKlass* ik = InstanceKlass::cast(obj->klass());
4018   bool is_reference = ik->reference_type() != REF_NONE;
4019   assert(!is_reference || ik->is_subclass_of(vmClasses::Reference_klass()), "sanity");
4020   return is_reference;
4021 }
4022 
4023 int* java_lang_boxing_object::_offsets;
4024 
4025 #define BOXING_FIELDS_DO(macro)                                                                                                    \
4026   macro(java_lang_boxing_object::_offsets[T_BOOLEAN - T_BOOLEAN], vmClasses::Boolean_klass(),   "value", bool_signature,   false); \
4027   macro(java_lang_boxing_object::_offsets[T_CHAR - T_BOOLEAN],    vmClasses::Character_klass(), "value", char_signature,   false); \
4028   macro(java_lang_boxing_object::_offsets[T_FLOAT - T_BOOLEAN],   vmClasses::Float_klass(),     "value", float_signature,  false); \
4029   macro(java_lang_boxing_object::_offsets[T_DOUBLE - T_BOOLEAN],  vmClasses::Double_klass(),    "value", double_signature, false); \
4030   macro(java_lang_boxing_object::_offsets[T_BYTE - T_BOOLEAN],    vmClasses::Byte_klass(),      "value", byte_signature,   false); \
4031   macro(java_lang_boxing_object::_offsets[T_SHORT - T_BOOLEAN],   vmClasses::Short_klass(),     "value", short_signature,  false); \
4032   macro(java_lang_boxing_object::_offsets[T_INT - T_BOOLEAN],     vmClasses::Integer_klass(),   "value", int_signature,    false); \
4033   macro(java_lang_boxing_object::_offsets[T_LONG - T_BOOLEAN],    vmClasses::Long_klass(),      "value", long_signature,   false);
4034 
4035 void java_lang_boxing_object::compute_offsets() {
4036   assert(T_LONG - T_BOOLEAN == 7, "Sanity check");
4037   java_lang_boxing_object::_offsets = NEW_C_HEAP_ARRAY(int, 8, mtInternal);
4038   BOXING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4039 }
4040 
4041 #if INCLUDE_CDS
4042 void java_lang_boxing_object::serialize_offsets(SerializeClosure* f) {
4043   if (f->reading()) {
4044     assert(T_LONG - T_BOOLEAN == 7, "Sanity check");
4045     java_lang_boxing_object::_offsets = NEW_C_HEAP_ARRAY(int, 8, mtInternal);
4046   }
4047   BOXING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4048 }
4049 #endif
4050 
4051 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
4052   Klass* k = vmClasses::box_klass(type);
4053   if (k == nullptr)  return nullptr;
4054   InstanceKlass* ik = InstanceKlass::cast(k);
4055   if (!ik->is_initialized()) {
4056     ik->initialize(CHECK_NULL);
4057   }
4058   return ik->allocate_instance(THREAD);
4059 }
4060 
4061 
4062 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
4063   oop box = initialize_and_allocate(type, CHECK_NULL);
4064   if (box == nullptr)  return nullptr;
4065   switch (type) {
4066     case T_BOOLEAN:
4067       box->bool_field_put(value_offset(type), value->z);
4068       break;
4069     case T_CHAR:
4070       box->char_field_put(value_offset(type), value->c);
4071       break;
4072     case T_FLOAT:
4073       box->float_field_put(value_offset(type), value->f);
4074       break;
4075     case T_DOUBLE:
4076       box->double_field_put(value_offset(type), value->d);
4077       break;
4078     case T_BYTE:
4079       box->byte_field_put(value_offset(type), value->b);
4080       break;
4081     case T_SHORT:
4082       box->short_field_put(value_offset(type), value->s);
4083       break;
4084     case T_INT:
4085       box->int_field_put(value_offset(type), value->i);
4086       break;
4087     case T_LONG:
4088       box->long_field_put(value_offset(type), value->j);
4089       break;
4090     default:
4091       return nullptr;
4092   }
4093   return box;
4094 }
4095 
4096 
4097 BasicType java_lang_boxing_object::basic_type(oop box) {
4098   if (box == nullptr)  return T_ILLEGAL;
4099   BasicType type = vmClasses::box_klass_type(box->klass());
4100   if (type == T_OBJECT)         // 'unknown' value returned by SD::bkt
4101     return T_ILLEGAL;
4102   return type;
4103 }
4104 
4105 
4106 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
4107   BasicType type = vmClasses::box_klass_type(box->klass());
4108   switch (type) {
4109   case T_BOOLEAN:
4110     value->z = box->bool_field(value_offset(type));
4111     break;
4112   case T_CHAR:
4113     value->c = box->char_field(value_offset(type));
4114     break;
4115   case T_FLOAT:
4116     value->f = box->float_field(value_offset(type));
4117     break;
4118   case T_DOUBLE:
4119     value->d = box->double_field(value_offset(type));
4120     break;
4121   case T_BYTE:
4122     value->b = box->byte_field(value_offset(type));
4123     break;
4124   case T_SHORT:
4125     value->s = box->short_field(value_offset(type));
4126     break;
4127   case T_INT:
4128     value->i = box->int_field(value_offset(type));
4129     break;
4130   case T_LONG:
4131     value->j = box->long_field(value_offset(type));
4132     break;
4133   default:
4134     return T_ILLEGAL;
4135   } // end switch
4136   return type;
4137 }
4138 
4139 
4140 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
4141   BasicType type = vmClasses::box_klass_type(box->klass());
4142   switch (type) {
4143   case T_BOOLEAN:
4144     box->bool_field_put(value_offset(type), value->z);
4145     break;
4146   case T_CHAR:
4147     box->char_field_put(value_offset(type), value->c);
4148     break;
4149   case T_FLOAT:
4150     box->float_field_put(value_offset(type), value->f);
4151     break;
4152   case T_DOUBLE:
4153     box->double_field_put(value_offset(type), value->d);
4154     break;
4155   case T_BYTE:
4156     box->byte_field_put(value_offset(type), value->b);
4157     break;
4158   case T_SHORT:
4159     box->short_field_put(value_offset(type), value->s);
4160     break;
4161   case T_INT:
4162     box->int_field_put(value_offset(type), value->i);
4163     break;
4164   case T_LONG:
4165     box->long_field_put(value_offset(type), value->j);
4166     break;
4167   default:
4168     return T_ILLEGAL;
4169   } // end switch
4170   return type;
4171 }
4172 
4173 
4174 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
4175   switch (type) {
4176   case T_BOOLEAN:   st->print("%s", value->z ? "true" : "false");   break;
4177   case T_CHAR:      st->print("%d", value->c);                      break;
4178   case T_BYTE:      st->print("%d", value->b);                      break;
4179   case T_SHORT:     st->print("%d", value->s);                      break;
4180   case T_INT:       st->print("%d", value->i);                      break;
4181   case T_LONG:      st->print(JLONG_FORMAT, value->j);              break;
4182   case T_FLOAT:     st->print("%f", value->f);                      break;
4183   case T_DOUBLE:    st->print("%lf", value->d);                     break;
4184   default:          st->print("type %d?", type);                    break;
4185   }
4186 }
4187 
4188 
4189 // Support for java_lang_ref_SoftReference
4190 //
4191 
4192 int java_lang_ref_SoftReference::_timestamp_offset;
4193 int java_lang_ref_SoftReference::_static_clock_offset;
4194 
4195 #define SOFTREFERENCE_FIELDS_DO(macro) \
4196   macro(_timestamp_offset,    k, "timestamp", long_signature, false); \
4197   macro(_static_clock_offset, k, "clock",     long_signature, true)
4198 
4199 void java_lang_ref_SoftReference::compute_offsets() {
4200   InstanceKlass* k = vmClasses::SoftReference_klass();
4201   SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4202 }
4203 
4204 #if INCLUDE_CDS
4205 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
4206   SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4207 }
4208 #endif
4209 
4210 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
4211   return ref->long_field(_timestamp_offset);
4212 }
4213 
4214 jlong java_lang_ref_SoftReference::clock() {
4215   InstanceKlass* ik = vmClasses::SoftReference_klass();
4216   oop base = ik->static_field_base_raw();
4217   return base->long_field(_static_clock_offset);
4218 }
4219 
4220 void java_lang_ref_SoftReference::set_clock(jlong value) {
4221   InstanceKlass* ik = vmClasses::SoftReference_klass();
4222   oop base = ik->static_field_base_raw();
4223   base->long_field_put(_static_clock_offset, value);
4224 }
4225 
4226 // Support for java_lang_invoke_DirectMethodHandle
4227 
4228 int java_lang_invoke_DirectMethodHandle::_member_offset;
4229 
4230 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
4231   oop member_name = nullptr;
4232   assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
4233          "a DirectMethodHandle oop is expected");
4234   return dmh->obj_field(_member_offset);
4235 }
4236 
4237 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
4238   macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
4239 
4240 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
4241   InstanceKlass* k = vmClasses::DirectMethodHandle_klass();
4242   DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4243 }
4244 
4245 #if INCLUDE_CDS
4246 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
4247   DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4248 }
4249 #endif
4250 
4251 // Support for java_lang_invoke_MethodHandle
4252 
4253 int java_lang_invoke_MethodHandle::_type_offset;
4254 int java_lang_invoke_MethodHandle::_form_offset;
4255 
4256 int java_lang_invoke_MemberName::_clazz_offset;
4257 int java_lang_invoke_MemberName::_name_offset;
4258 int java_lang_invoke_MemberName::_type_offset;
4259 int java_lang_invoke_MemberName::_flags_offset;
4260 int java_lang_invoke_MemberName::_method_offset;
4261 int java_lang_invoke_MemberName::_vmindex_offset;
4262 
4263 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
4264 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
4265 
4266 int java_lang_invoke_LambdaForm::_vmentry_offset;
4267 
4268 #define METHODHANDLE_FIELDS_DO(macro) \
4269   macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
4270   macro(_form_offset, k, "form",                 java_lang_invoke_LambdaForm_signature, false)
4271 
4272 void java_lang_invoke_MethodHandle::compute_offsets() {
4273   InstanceKlass* k = vmClasses::MethodHandle_klass();
4274   METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4275 }
4276 
4277 #if INCLUDE_CDS
4278 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
4279   METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4280 }
4281 #endif
4282 
4283 #define MEMBERNAME_FIELDS_DO(macro) \
4284   macro(_clazz_offset,   k, vmSymbols::clazz_name(),   class_signature,  false); \
4285   macro(_name_offset,    k, vmSymbols::name_name(),    string_signature, false); \
4286   macro(_type_offset,    k, vmSymbols::type_name(),    object_signature, false); \
4287   macro(_flags_offset,   k, vmSymbols::flags_name(),   int_signature,    false); \
4288   macro(_method_offset,  k, vmSymbols::method_name(),  java_lang_invoke_ResolvedMethodName_signature, false)
4289 
4290 void java_lang_invoke_MemberName::compute_offsets() {
4291   InstanceKlass* k = vmClasses::MemberName_klass();
4292   MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4293   MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4294 }
4295 
4296 #if INCLUDE_CDS
4297 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
4298   MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4299   MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4300 }
4301 #endif
4302 
4303 #define RESOLVEDMETHOD_FIELDS_DO(macro) \
4304   macro(_vmholder_offset, k, "vmholder", class_signature, false)
4305 
4306 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
4307   InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4308   assert(k != nullptr, "jdk mismatch");
4309   RESOLVEDMETHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4310   RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4311 }
4312 
4313 #if INCLUDE_CDS
4314 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
4315   RESOLVEDMETHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4316   RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4317 }
4318 #endif
4319 
4320 #define LAMBDAFORM_FIELDS_DO(macro) \
4321   macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
4322 
4323 void java_lang_invoke_LambdaForm::compute_offsets() {
4324   InstanceKlass* k = vmClasses::LambdaForm_klass();
4325   assert (k != nullptr, "jdk mismatch");
4326   LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4327 }
4328 
4329 #if INCLUDE_CDS
4330 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
4331   LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4332 }
4333 #endif
4334 
4335 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
4336   return obj != nullptr && is_subclass(obj->klass());
4337 }
4338 
4339 int jdk_internal_foreign_abi_NativeEntryPoint::_method_type_offset;
4340 int jdk_internal_foreign_abi_NativeEntryPoint::_downcall_stub_address_offset;
4341 
4342 #define NEP_FIELDS_DO(macro) \
4343   macro(_method_type_offset,           k, "methodType",          java_lang_invoke_MethodType_signature, false); \
4344   macro(_downcall_stub_address_offset, k, "downcallStubAddress", long_signature, false);
4345 
4346 bool jdk_internal_foreign_abi_NativeEntryPoint::is_instance(oop obj) {
4347   return obj != nullptr && is_subclass(obj->klass());
4348 }
4349 
4350 void jdk_internal_foreign_abi_NativeEntryPoint::compute_offsets() {
4351   InstanceKlass* k = vmClasses::NativeEntryPoint_klass();
4352   NEP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4353 }
4354 
4355 #if INCLUDE_CDS
4356 void jdk_internal_foreign_abi_NativeEntryPoint::serialize_offsets(SerializeClosure* f) {
4357   NEP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4358 }
4359 #endif
4360 
4361 oop jdk_internal_foreign_abi_NativeEntryPoint::method_type(oop entry) {
4362   return entry->obj_field(_method_type_offset);
4363 }
4364 
4365 jlong jdk_internal_foreign_abi_NativeEntryPoint::downcall_stub_address(oop entry) {
4366   return entry->long_field(_downcall_stub_address_offset);
4367 }
4368 
4369 int jdk_internal_foreign_abi_ABIDescriptor::_inputStorage_offset;
4370 int jdk_internal_foreign_abi_ABIDescriptor::_outputStorage_offset;
4371 int jdk_internal_foreign_abi_ABIDescriptor::_volatileStorage_offset;
4372 int jdk_internal_foreign_abi_ABIDescriptor::_stackAlignment_offset;
4373 int jdk_internal_foreign_abi_ABIDescriptor::_shadowSpace_offset;
4374 int jdk_internal_foreign_abi_ABIDescriptor::_scratch1_offset;
4375 int jdk_internal_foreign_abi_ABIDescriptor::_scratch2_offset;
4376 
4377 #define ABIDescriptor_FIELDS_DO(macro) \
4378   macro(_inputStorage_offset,    k, "inputStorage",    jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4379   macro(_outputStorage_offset,   k, "outputStorage",   jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4380   macro(_volatileStorage_offset, k, "volatileStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4381   macro(_stackAlignment_offset,  k, "stackAlignment",  int_signature, false); \
4382   macro(_shadowSpace_offset,     k, "shadowSpace",     int_signature, false); \
4383   macro(_scratch1_offset,        k, "scratch1",        jdk_internal_foreign_abi_VMStorage_signature, false); \
4384   macro(_scratch2_offset,        k, "scratch2",        jdk_internal_foreign_abi_VMStorage_signature, false);
4385 
4386 bool jdk_internal_foreign_abi_ABIDescriptor::is_instance(oop obj) {
4387   return obj != nullptr && is_subclass(obj->klass());
4388 }
4389 
4390 void jdk_internal_foreign_abi_ABIDescriptor::compute_offsets() {
4391   InstanceKlass* k = vmClasses::ABIDescriptor_klass();
4392   ABIDescriptor_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4393 }
4394 
4395 #if INCLUDE_CDS
4396 void jdk_internal_foreign_abi_ABIDescriptor::serialize_offsets(SerializeClosure* f) {
4397   ABIDescriptor_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4398 }
4399 #endif
4400 
4401 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::inputStorage(oop entry) {
4402   return oop_cast<objArrayOop>(entry->obj_field(_inputStorage_offset));
4403 }
4404 
4405 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::outputStorage(oop entry) {
4406   return oop_cast<objArrayOop>(entry->obj_field(_outputStorage_offset));
4407 }
4408 
4409 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::volatileStorage(oop entry) {
4410   return oop_cast<objArrayOop>(entry->obj_field(_volatileStorage_offset));
4411 }
4412 
4413 jint jdk_internal_foreign_abi_ABIDescriptor::stackAlignment(oop entry) {
4414   return entry->int_field(_stackAlignment_offset);
4415 }
4416 
4417 jint jdk_internal_foreign_abi_ABIDescriptor::shadowSpace(oop entry) {
4418   return entry->int_field(_shadowSpace_offset);
4419 }
4420 
4421 oop jdk_internal_foreign_abi_ABIDescriptor::scratch1(oop entry) {
4422   return entry->obj_field(_scratch1_offset);
4423 }
4424 
4425 oop jdk_internal_foreign_abi_ABIDescriptor::scratch2(oop entry) {
4426   return entry->obj_field(_scratch2_offset);
4427 }
4428 
4429 int jdk_internal_foreign_abi_VMStorage::_type_offset;
4430 int jdk_internal_foreign_abi_VMStorage::_indexOrOffset_offset;
4431 int jdk_internal_foreign_abi_VMStorage::_segmentMaskOrSize_offset;
4432 int jdk_internal_foreign_abi_VMStorage::_debugName_offset;
4433 
4434 #define VMStorage_FIELDS_DO(macro) \
4435   macro(_type_offset,              k, "type",              byte_signature, false); \
4436   macro(_indexOrOffset_offset,     k, "indexOrOffset",     int_signature, false); \
4437   macro(_segmentMaskOrSize_offset, k, "segmentMaskOrSize", short_signature, false); \
4438   macro(_debugName_offset,         k, "debugName",         string_signature, false); \
4439 
4440 bool jdk_internal_foreign_abi_VMStorage::is_instance(oop obj) {
4441   return obj != nullptr && is_subclass(obj->klass());
4442 }
4443 
4444 void jdk_internal_foreign_abi_VMStorage::compute_offsets() {
4445   InstanceKlass* k = vmClasses::VMStorage_klass();
4446   VMStorage_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4447 }
4448 
4449 #if INCLUDE_CDS
4450 void jdk_internal_foreign_abi_VMStorage::serialize_offsets(SerializeClosure* f) {
4451   VMStorage_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4452 }
4453 #endif
4454 
4455 jbyte jdk_internal_foreign_abi_VMStorage::type(oop entry) {
4456   return entry->byte_field(_type_offset);
4457 }
4458 
4459 jint jdk_internal_foreign_abi_VMStorage::index_or_offset(oop entry) {
4460   return entry->int_field(_indexOrOffset_offset);
4461 }
4462 
4463 jshort jdk_internal_foreign_abi_VMStorage::segment_mask_or_size(oop entry) {
4464   return entry->short_field(_segmentMaskOrSize_offset);
4465 }
4466 
4467 oop jdk_internal_foreign_abi_VMStorage::debugName(oop entry) {
4468   return entry->obj_field(_debugName_offset);
4469 }
4470 
4471 int jdk_internal_foreign_abi_CallConv::_argRegs_offset;
4472 int jdk_internal_foreign_abi_CallConv::_retRegs_offset;
4473 
4474 #define CallConv_FIELDS_DO(macro) \
4475   macro(_argRegs_offset, k, "argRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4476   macro(_retRegs_offset, k, "retRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4477 
4478 bool jdk_internal_foreign_abi_CallConv::is_instance(oop obj) {
4479   return obj != nullptr && is_subclass(obj->klass());
4480 }
4481 
4482 void jdk_internal_foreign_abi_CallConv::compute_offsets() {
4483   InstanceKlass* k = vmClasses::CallConv_klass();
4484   CallConv_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4485 }
4486 
4487 #if INCLUDE_CDS
4488 void jdk_internal_foreign_abi_CallConv::serialize_offsets(SerializeClosure* f) {
4489   CallConv_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4490 }
4491 #endif
4492 
4493 objArrayOop jdk_internal_foreign_abi_CallConv::argRegs(oop entry) {
4494   return oop_cast<objArrayOop>(entry->obj_field(_argRegs_offset));
4495 }
4496 
4497 objArrayOop jdk_internal_foreign_abi_CallConv::retRegs(oop entry) {
4498   return oop_cast<objArrayOop>(entry->obj_field(_retRegs_offset));
4499 }
4500 
4501 oop java_lang_invoke_MethodHandle::type(oop mh) {
4502   return mh->obj_field(_type_offset);
4503 }
4504 
4505 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
4506   mh->obj_field_put(_type_offset, mtype);
4507 }
4508 
4509 oop java_lang_invoke_MethodHandle::form(oop mh) {
4510   assert(_form_offset != 0, "");
4511   return mh->obj_field(_form_offset);
4512 }
4513 
4514 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
4515   assert(_form_offset != 0, "");
4516   mh->obj_field_put(_form_offset, lform);
4517 }
4518 
4519 /// MemberName accessors
4520 
4521 oop java_lang_invoke_MemberName::clazz(oop mname) {
4522   assert(is_instance(mname), "wrong type");
4523   return mname->obj_field(_clazz_offset);
4524 }
4525 
4526 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
4527   assert(is_instance(mname), "wrong type");
4528   mname->obj_field_put(_clazz_offset, clazz);
4529 }
4530 
4531 oop java_lang_invoke_MemberName::name(oop mname) {
4532   assert(is_instance(mname), "wrong type");
4533   return mname->obj_field(_name_offset);
4534 }
4535 
4536 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
4537   assert(is_instance(mname), "wrong type");
4538   mname->obj_field_put(_name_offset, name);
4539 }
4540 
4541 oop java_lang_invoke_MemberName::type(oop mname) {
4542   assert(is_instance(mname), "wrong type");
4543   return mname->obj_field(_type_offset);
4544 }
4545 
4546 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
4547   assert(is_instance(mname), "wrong type");
4548   mname->obj_field_put(_type_offset, type);
4549 }
4550 
4551 int java_lang_invoke_MemberName::flags(oop mname) {
4552   assert(is_instance(mname), "wrong type");
4553   return mname->int_field(_flags_offset);
4554 }
4555 
4556 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
4557   assert(is_instance(mname), "wrong type");
4558   mname->int_field_put(_flags_offset, flags);
4559 }
4560 
4561 // Return vmtarget from ResolvedMethodName method field through indirection
4562 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
4563   assert(is_instance(mname), "wrong type");
4564   oop method = mname->obj_field(_method_offset);
4565   return method == nullptr ? nullptr : java_lang_invoke_ResolvedMethodName::vmtarget(method);
4566 }
4567 
4568 bool java_lang_invoke_MemberName::is_method(oop mname) {
4569   assert(is_instance(mname), "must be MemberName");
4570   return (flags(mname) & (MN_IS_METHOD | MN_IS_OBJECT_CONSTRUCTOR)) > 0;
4571 }
4572 
4573 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
4574   assert(is_instance(mname), "wrong type");
4575   mname->obj_field_put(_method_offset, resolved_method);
4576 }
4577 
4578 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
4579   assert(is_instance(mname), "wrong type");
4580   return (intptr_t) mname->address_field(_vmindex_offset);
4581 }
4582 
4583 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
4584   assert(is_instance(mname), "wrong type");
4585   mname->address_field_put(_vmindex_offset, (address) index);
4586 }
4587 
4588 
4589 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
4590   assert(is_instance(resolved_method), "wrong type");
4591   Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
4592   assert(m->is_method(), "must be");
4593   return m;
4594 }
4595 
4596 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
4597 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
4598   assert(is_instance(resolved_method), "wrong type");
4599   resolved_method->address_field_put(_vmtarget_offset, (address)m);
4600 }
4601 
4602 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) {
4603   assert(is_instance(resolved_method), "wrong type");
4604   resolved_method->obj_field_put(_vmholder_offset, holder);
4605 }
4606 
4607 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
4608   const Method* method = m();
4609 
4610   // lookup ResolvedMethod oop in the table, or create a new one and intern it
4611   oop resolved_method = ResolvedMethodTable::find_method(method);
4612   if (resolved_method != nullptr) {
4613     return resolved_method;
4614   }
4615 
4616   InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4617   if (!k->is_initialized()) {
4618     k->initialize(CHECK_NULL);
4619   }
4620 
4621   oop new_resolved_method = k->allocate_instance(CHECK_NULL);
4622 
4623   NoSafepointVerifier nsv;
4624 
4625   if (method->is_old()) {
4626     method = (method->is_deleted()) ? Universe::throw_no_such_method_error() :
4627                                       method->get_new_method();
4628   }
4629 
4630   InstanceKlass* holder = method->method_holder();
4631 
4632   set_vmtarget(new_resolved_method, const_cast<Method*>(method));
4633   // Add a reference to the loader (actually mirror because hidden classes may not have
4634   // distinct loaders) to ensure the metadata is kept alive.
4635   // This mirror may be different than the one in clazz field.
4636   set_vmholder(new_resolved_method, holder->java_mirror());
4637 
4638   // Set flag in class to indicate this InstanceKlass has entries in the table
4639   // to avoid walking table during redefinition if none of the redefined classes
4640   // have any membernames in the table.
4641   holder->set_has_resolved_methods();
4642 
4643   return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method));
4644 }
4645 
4646 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
4647   assert(is_instance(lform), "wrong type");
4648   return lform->obj_field(_vmentry_offset);
4649 }
4650 
4651 
4652 // Support for java_lang_invoke_MethodType
4653 
4654 int java_lang_invoke_MethodType::_rtype_offset;
4655 int java_lang_invoke_MethodType::_ptypes_offset;
4656 
4657 #define METHODTYPE_FIELDS_DO(macro) \
4658   macro(_rtype_offset,  k, "rtype",  class_signature,       false); \
4659   macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
4660 
4661 void java_lang_invoke_MethodType::compute_offsets() {
4662   InstanceKlass* k = vmClasses::MethodType_klass();
4663   METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4664 }
4665 
4666 #if INCLUDE_CDS
4667 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
4668   METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4669 }
4670 #endif
4671 
4672 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
4673   st->print("(");
4674   objArrayOop pts = ptypes(mt);
4675   if (pts != nullptr) {
4676     for (int i = 0, limit = pts->length(); i < limit; i++) {
4677       java_lang_Class::print_signature(pts->obj_at(i), st);
4678     }
4679   } else {
4680     st->print("null");
4681   }
4682   st->print(")");
4683   oop rt = rtype(mt);
4684   if (rt != nullptr) {
4685     java_lang_Class::print_signature(rt, st);
4686   } else {
4687     st->print("null");
4688   }
4689 }
4690 
4691 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) {
4692   ResourceMark rm;
4693   stringStream buffer(128);
4694   print_signature(mt, &buffer);
4695   const char* sigstr =       buffer.base();
4696   int         siglen = (int) buffer.size();
4697   Symbol *name;
4698   if (!intern_if_not_found) {
4699     name = SymbolTable::probe(sigstr, siglen);
4700   } else {
4701     name = SymbolTable::new_symbol(sigstr, siglen);
4702   }
4703   return name;
4704 }
4705 
4706 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
4707   if (mt1 == mt2)
4708     return true;
4709   if (rtype(mt1) != rtype(mt2))
4710     return false;
4711   if (ptype_count(mt1) != ptype_count(mt2))
4712     return false;
4713   for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
4714     if (ptype(mt1, i) != ptype(mt2, i))
4715       return false;
4716   }
4717   return true;
4718 }
4719 
4720 oop java_lang_invoke_MethodType::rtype(oop mt) {
4721   assert(is_instance(mt), "must be a MethodType");
4722   return mt->obj_field(_rtype_offset);
4723 }
4724 
4725 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
4726   assert(is_instance(mt), "must be a MethodType");
4727   return (objArrayOop) mt->obj_field(_ptypes_offset);
4728 }
4729 
4730 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
4731   return ptypes(mt)->obj_at(idx);
4732 }
4733 
4734 int java_lang_invoke_MethodType::ptype_count(oop mt) {
4735   return ptypes(mt)->length();
4736 }
4737 
4738 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
4739   objArrayOop pts = ptypes(mt);
4740   int count = pts->length();
4741   int slots = 0;
4742   for (int i = 0; i < count; i++) {
4743     BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
4744     slots += type2size[bt];
4745   }
4746   return slots;
4747 }
4748 
4749 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
4750   BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
4751   return type2size[bt];
4752 }
4753 
4754 
4755 // Support for java_lang_invoke_CallSite
4756 
4757 int java_lang_invoke_CallSite::_target_offset;
4758 int java_lang_invoke_CallSite::_vmdependencies_offset;
4759 int java_lang_invoke_CallSite::_last_cleanup_offset;
4760 
4761 #define CALLSITE_FIELDS_DO(macro) \
4762   macro(_target_offset,  k, "target", java_lang_invoke_MethodHandle_signature, false); \
4763 
4764 void java_lang_invoke_CallSite::compute_offsets() {
4765   InstanceKlass* k = vmClasses::CallSite_klass();
4766   CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4767   CALLSITE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4768 }
4769 
4770 #if INCLUDE_CDS
4771 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
4772   CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4773   CALLSITE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4774 }
4775 #endif
4776 
4777 DependencyContext java_lang_invoke_CallSite::vmdependencies(oop call_site) {
4778   assert(java_lang_invoke_CallSite::is_instance(call_site), "");
4779   nmethodBucket* volatile* vmdeps_addr = call_site->field_addr<nmethodBucket* volatile>(_vmdependencies_offset);
4780   volatile uint64_t* last_cleanup_addr = call_site->field_addr<volatile uint64_t>(_last_cleanup_offset);
4781   DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr);
4782   return dep_ctx;
4783 }
4784 
4785 // Support for java_lang_invoke_ConstantCallSite
4786 
4787 int java_lang_invoke_ConstantCallSite::_is_frozen_offset;
4788 
4789 #define CONSTANTCALLSITE_FIELDS_DO(macro) \
4790   macro(_is_frozen_offset, k, "isFrozen", bool_signature, false)
4791 
4792 void java_lang_invoke_ConstantCallSite::compute_offsets() {
4793   InstanceKlass* k = vmClasses::ConstantCallSite_klass();
4794   CONSTANTCALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4795 }
4796 
4797 #if INCLUDE_CDS
4798 void java_lang_invoke_ConstantCallSite::serialize_offsets(SerializeClosure* f) {
4799   CONSTANTCALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4800 }
4801 #endif
4802 
4803 // Support for java_lang_ClassLoader
4804 
4805 int  java_lang_ClassLoader::_loader_data_offset;
4806 int  java_lang_ClassLoader::_parallelCapable_offset;
4807 int  java_lang_ClassLoader::_name_offset;
4808 int  java_lang_ClassLoader::_nameAndId_offset;
4809 int  java_lang_ClassLoader::_unnamedModule_offset;
4810 int  java_lang_ClassLoader::_parent_offset;
4811 
4812 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
4813   assert(loader != nullptr, "loader must not be null");
4814   assert(oopDesc::is_oop(loader), "loader must be oop");
4815   return AtomicAccess::load_acquire(loader->field_addr<ClassLoaderData*>(_loader_data_offset));
4816 }
4817 
4818 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
4819   assert(loader != nullptr, "loader must not be null");
4820   assert(oopDesc::is_oop(loader), "loader must be oop");
4821   return *loader->field_addr<ClassLoaderData*>(_loader_data_offset);
4822 }
4823 
4824 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
4825   assert(loader != nullptr, "loader must not be null");
4826   assert(oopDesc::is_oop(loader), "loader must be oop");
4827   AtomicAccess::release_store(loader->field_addr<ClassLoaderData*>(_loader_data_offset), new_data);
4828 }
4829 
4830 #define CLASSLOADER_FIELDS_DO(macro) \
4831   macro(_parallelCapable_offset, k1, "parallelLockMap",      concurrenthashmap_signature, false); \
4832   macro(_name_offset,            k1, vmSymbols::name_name(), string_signature, false); \
4833   macro(_nameAndId_offset,       k1, "nameAndId",            string_signature, false); \
4834   macro(_unnamedModule_offset,   k1, "unnamedModule",        module_signature, false); \
4835   macro(_parent_offset,          k1, "parent",               classloader_signature, false)
4836 
4837 void java_lang_ClassLoader::compute_offsets() {
4838   InstanceKlass* k1 = vmClasses::ClassLoader_klass();
4839   CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4840 
4841   CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4842 }
4843 
4844 #if INCLUDE_CDS
4845 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
4846   CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4847   CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4848 }
4849 #endif
4850 
4851 oop java_lang_ClassLoader::parent(oop loader) {
4852   assert(is_instance(loader), "loader must be oop");
4853   return loader->obj_field(_parent_offset);
4854 }
4855 
4856 oop java_lang_ClassLoader::parent_no_keepalive(oop loader) {
4857   assert(is_instance(loader), "loader must be oop");
4858   return loader->obj_field_access<AS_NO_KEEPALIVE>(_parent_offset);
4859 }
4860 
4861 // Returns the name field of this class loader.  If the name field has not
4862 // been set, null will be returned.
4863 oop java_lang_ClassLoader::name(oop loader) {
4864   assert(is_instance(loader), "loader must be oop");
4865   return loader->obj_field(_name_offset);
4866 }
4867 
4868 // Returns the nameAndId field of this class loader. The format is
4869 // as follows:
4870 //   If the defining loader has a name explicitly set then '<loader-name>' @<id>
4871 //   If the defining loader has no name then <qualified-class-name> @<id>
4872 //   If built-in loader, then omit '@<id>' as there is only one instance.
4873 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
4874 oop java_lang_ClassLoader::nameAndId(oop loader) {
4875   assert(is_instance(loader), "loader must be oop");
4876   return loader->obj_field(_nameAndId_offset);
4877 }
4878 
4879 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
4880   assert(is_instance(loader), "loader must be oop");
4881   assert(cl == nullptr || is_instance(cl), "cl argument must be oop");
4882   oop acl = loader;
4883   DEBUG_ONLY(jint loop_count = 0);
4884   // This loop taken verbatim from ClassLoader.java:
4885   do {
4886     acl = parent(acl);
4887     if (cl == acl) {
4888       return true;
4889     }
4890     assert(++loop_count > 0, "loop_count overflow");
4891   } while (acl != nullptr);
4892   return false;
4893 }
4894 
4895 bool java_lang_ClassLoader::is_instance(oop obj) {
4896   return obj != nullptr && is_subclass(obj->klass());
4897 }
4898 
4899 
4900 // For class loader classes, parallelCapable defined
4901 // based on non-null field
4902 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
4903 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
4904   assert(_parallelCapable_offset != 0, "offsets should have been initialized");
4905   return (class_loader->obj_field(_parallelCapable_offset) != nullptr);
4906 }
4907 
4908 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
4909   oop cl = SystemDictionary::java_system_loader();
4910   while(cl != nullptr) {
4911     if (cl == loader) return true;
4912     cl = parent(cl);
4913   }
4914   return false;
4915 }
4916 
4917 oop java_lang_ClassLoader::unnamedModule(oop loader) {
4918   assert(is_instance(loader), "loader must be oop");
4919   return loader->obj_field(_unnamedModule_offset);
4920 }
4921 
4922 // Support for java_lang_System
4923 //
4924 
4925 int java_lang_System::_static_in_offset;
4926 int java_lang_System::_static_out_offset;
4927 int java_lang_System::_static_err_offset;
4928 
4929 #define SYSTEM_FIELDS_DO(macro) \
4930   macro(_static_in_offset,  k, "in",  input_stream_signature, true); \
4931   macro(_static_out_offset, k, "out", print_stream_signature, true); \
4932   macro(_static_err_offset, k, "err", print_stream_signature, true);
4933 
4934 void java_lang_System::compute_offsets() {
4935   InstanceKlass* k = vmClasses::System_klass();
4936   SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4937 }
4938 
4939 #if INCLUDE_CDS
4940 void java_lang_System::serialize_offsets(SerializeClosure* f) {
4941    SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4942 }
4943 #endif
4944 
4945 // Support for jdk_internal_misc_UnsafeConstants
4946 //
4947 class UnsafeConstantsFixup : public FieldClosure {
4948 private:
4949   int _address_size;
4950   int _page_size;
4951   bool _big_endian;
4952   bool _use_unaligned_access;
4953   int _data_cache_line_flush_size;
4954 public:
4955   UnsafeConstantsFixup() {
4956     // round up values for all static final fields
4957     _address_size = sizeof(void*);
4958     _page_size = AIX_ONLY(sysconf(_SC_PAGESIZE)) NOT_AIX((int)os::vm_page_size());
4959     _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true);
4960     _use_unaligned_access = UseUnalignedAccesses;
4961     _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size();
4962   }
4963 
4964   void do_field(fieldDescriptor* fd) {
4965     oop mirror = fd->field_holder()->java_mirror();
4966     assert(mirror != nullptr, "UnsafeConstants must have mirror already");
4967     assert(fd->field_holder() == vmClasses::UnsafeConstants_klass(), "Should be UnsafeConstants");
4968     assert(fd->is_final(), "fields of UnsafeConstants must be final");
4969     assert(fd->is_static(), "fields of UnsafeConstants must be static");
4970     if (fd->name() == vmSymbols::address_size_name()) {
4971       mirror->int_field_put(fd->offset(), _address_size);
4972     } else if (fd->name() == vmSymbols::page_size_name()) {
4973       mirror->int_field_put(fd->offset(), _page_size);
4974     } else if (fd->name() == vmSymbols::big_endian_name()) {
4975       mirror->bool_field_put(fd->offset(), _big_endian);
4976     } else if (fd->name() == vmSymbols::use_unaligned_access_name()) {
4977       mirror->bool_field_put(fd->offset(), _use_unaligned_access);
4978     } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) {
4979       mirror->int_field_put(fd->offset(), _data_cache_line_flush_size);
4980     } else {
4981       assert(false, "unexpected UnsafeConstants field");
4982     }
4983   }
4984 };
4985 
4986 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() {
4987   UnsafeConstantsFixup fixup;
4988   vmClasses::UnsafeConstants_klass()->do_local_static_fields(&fixup);
4989 }
4990 
4991 
4992 // java_lang_StackTraceElement
4993 
4994 int java_lang_StackTraceElement::_methodName_offset;
4995 int java_lang_StackTraceElement::_fileName_offset;
4996 int java_lang_StackTraceElement::_lineNumber_offset;
4997 int java_lang_StackTraceElement::_moduleName_offset;
4998 int java_lang_StackTraceElement::_moduleVersion_offset;
4999 int java_lang_StackTraceElement::_classLoaderName_offset;
5000 int java_lang_StackTraceElement::_declaringClass_offset;
5001 int java_lang_StackTraceElement::_declaringClassObject_offset;
5002 
5003 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
5004   macro(_declaringClassObject_offset,  k, "declaringClassObject", class_signature, false); \
5005   macro(_classLoaderName_offset, k, "classLoaderName", string_signature, false); \
5006   macro(_moduleName_offset,      k, "moduleName",      string_signature, false); \
5007   macro(_moduleVersion_offset,   k, "moduleVersion",   string_signature, false); \
5008   macro(_declaringClass_offset,  k, "declaringClass",  string_signature, false); \
5009   macro(_methodName_offset,      k, "methodName",      string_signature, false); \
5010   macro(_fileName_offset,        k, "fileName",        string_signature, false); \
5011   macro(_lineNumber_offset,      k, "lineNumber",      int_signature,    false)
5012 
5013 // Support for java_lang_StackTraceElement
5014 void java_lang_StackTraceElement::compute_offsets() {
5015   InstanceKlass* k = vmClasses::StackTraceElement_klass();
5016   STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5017 }
5018 
5019 #if INCLUDE_CDS
5020 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
5021   STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5022 }
5023 #endif
5024 
5025 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
5026   element->obj_field_put(_fileName_offset, value);
5027 }
5028 
5029 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
5030   element->obj_field_put(_declaringClass_offset, value);
5031 }
5032 
5033 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
5034   element->obj_field_put(_methodName_offset, value);
5035 }
5036 
5037 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
5038   element->int_field_put(_lineNumber_offset, value);
5039 }
5040 
5041 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
5042   element->obj_field_put(_moduleName_offset, value);
5043 }
5044 
5045 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
5046   element->obj_field_put(_moduleVersion_offset, value);
5047 }
5048 
5049 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
5050   element->obj_field_put(_classLoaderName_offset, value);
5051 }
5052 
5053 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
5054   element->obj_field_put(_declaringClassObject_offset, value);
5055 }
5056 
5057 
5058 // java_lang_AssertionStatusDirectives
5059 
5060 int java_lang_AssertionStatusDirectives::_classes_offset;
5061 int java_lang_AssertionStatusDirectives::_classEnabled_offset;
5062 int java_lang_AssertionStatusDirectives::_packages_offset;
5063 int java_lang_AssertionStatusDirectives::_packageEnabled_offset;
5064 int java_lang_AssertionStatusDirectives::_deflt_offset;
5065 
5066 // Support for java Assertions - java_lang_AssertionStatusDirectives.
5067 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
5068   macro(_classes_offset,        k, "classes",        string_array_signature, false); \
5069   macro(_classEnabled_offset,   k, "classEnabled",   bool_array_signature, false); \
5070   macro(_packages_offset,       k, "packages",       string_array_signature, false); \
5071   macro(_packageEnabled_offset, k, "packageEnabled", bool_array_signature,   false); \
5072   macro(_deflt_offset,          k, "deflt",          bool_signature,         false)
5073 
5074 void java_lang_AssertionStatusDirectives::compute_offsets() {
5075   InstanceKlass* k = vmClasses::AssertionStatusDirectives_klass();
5076   ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5077 }
5078 
5079 #if INCLUDE_CDS
5080 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
5081   ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5082 }
5083 #endif
5084 
5085 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
5086   o->obj_field_put(_classes_offset, val);
5087 }
5088 
5089 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
5090   o->obj_field_put(_classEnabled_offset, val);
5091 }
5092 
5093 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
5094   o->obj_field_put(_packages_offset, val);
5095 }
5096 
5097 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
5098   o->obj_field_put(_packageEnabled_offset, val);
5099 }
5100 
5101 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
5102   o->bool_field_put(_deflt_offset, val);
5103 }
5104 
5105 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
5106 
5107 #define AOS_FIELDS_DO(macro) \
5108   macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
5109 
5110 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
5111   InstanceKlass* k = vmClasses::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
5112   AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5113 }
5114 
5115 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
5116   assert(_owner_offset != 0, "Must be initialized");
5117   return obj->obj_field(_owner_offset);
5118 }
5119 
5120 #if INCLUDE_CDS
5121 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
5122   AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5123 }
5124 #endif
5125 
5126 int vector_VectorPayload::_payload_offset;
5127 
5128 #define VECTORPAYLOAD_FIELDS_DO(macro) \
5129   macro(_payload_offset, k, "payload", object_signature, false)
5130 
5131 void vector_VectorPayload::compute_offsets() {
5132   InstanceKlass* k = vmClasses::vector_VectorPayload_klass();
5133   VECTORPAYLOAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5134 }
5135 
5136 #if INCLUDE_CDS
5137 void vector_VectorPayload::serialize_offsets(SerializeClosure* f) {
5138   VECTORPAYLOAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5139 }
5140 #endif
5141 
5142 void vector_VectorPayload::set_payload(oop o, oop val) {
5143   o->obj_field_put(_payload_offset, val);
5144 }
5145 
5146 bool vector_VectorPayload::is_instance(oop obj) {
5147   return obj != nullptr && is_subclass(obj->klass());
5148 }
5149 
5150 int java_lang_Integer_IntegerCache::_static_cache_offset;
5151 int java_lang_Long_LongCache::_static_cache_offset;
5152 int java_lang_Character_CharacterCache::_static_cache_offset;
5153 int java_lang_Short_ShortCache::_static_cache_offset;
5154 int java_lang_Byte_ByteCache::_static_cache_offset;
5155 
5156 #define INTEGER_CACHE_FIELDS_DO(macro) \
5157   macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true)
5158 
5159 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) {
5160   guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5161   INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5162 }
5163 
5164 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) {
5165   oop base = ik->static_field_base_raw();
5166   return objArrayOop(base->obj_field(_static_cache_offset));
5167 }
5168 
5169 Symbol* java_lang_Integer_IntegerCache::symbol() {
5170   return vmSymbols::java_lang_Integer_IntegerCache();
5171 }
5172 
5173 #if INCLUDE_CDS
5174 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) {
5175   INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5176 }
5177 #endif
5178 #undef INTEGER_CACHE_FIELDS_DO
5179 
5180 jint java_lang_Integer::value(oop obj) {
5181    jvalue v;
5182    java_lang_boxing_object::get_value(obj, &v);
5183    return v.i;
5184 }
5185 
5186 #define LONG_CACHE_FIELDS_DO(macro) \
5187   macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true)
5188 
5189 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) {
5190   guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5191   LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5192 }
5193 
5194 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) {
5195   oop base = ik->static_field_base_raw();
5196   return objArrayOop(base->obj_field(_static_cache_offset));
5197 }
5198 
5199 Symbol* java_lang_Long_LongCache::symbol() {
5200   return vmSymbols::java_lang_Long_LongCache();
5201 }
5202 
5203 #if INCLUDE_CDS
5204 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) {
5205   LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5206 }
5207 #endif
5208 #undef LONG_CACHE_FIELDS_DO
5209 
5210 jlong java_lang_Long::value(oop obj) {
5211    jvalue v;
5212    java_lang_boxing_object::get_value(obj, &v);
5213    return v.j;
5214 }
5215 
5216 #define CHARACTER_CACHE_FIELDS_DO(macro) \
5217   macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true)
5218 
5219 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) {
5220   guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5221   CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5222 }
5223 
5224 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) {
5225   oop base = ik->static_field_base_raw();
5226   return objArrayOop(base->obj_field(_static_cache_offset));
5227 }
5228 
5229 Symbol* java_lang_Character_CharacterCache::symbol() {
5230   return vmSymbols::java_lang_Character_CharacterCache();
5231 }
5232 
5233 #if INCLUDE_CDS
5234 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) {
5235   CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5236 }
5237 #endif
5238 #undef CHARACTER_CACHE_FIELDS_DO
5239 
5240 jchar java_lang_Character::value(oop obj) {
5241    jvalue v;
5242    java_lang_boxing_object::get_value(obj, &v);
5243    return v.c;
5244 }
5245 
5246 #define SHORT_CACHE_FIELDS_DO(macro) \
5247   macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true)
5248 
5249 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) {
5250   guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5251   SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5252 }
5253 
5254 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) {
5255   oop base = ik->static_field_base_raw();
5256   return objArrayOop(base->obj_field(_static_cache_offset));
5257 }
5258 
5259 Symbol* java_lang_Short_ShortCache::symbol() {
5260   return vmSymbols::java_lang_Short_ShortCache();
5261 }
5262 
5263 #if INCLUDE_CDS
5264 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) {
5265   SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5266 }
5267 #endif
5268 #undef SHORT_CACHE_FIELDS_DO
5269 
5270 jshort java_lang_Short::value(oop obj) {
5271    jvalue v;
5272    java_lang_boxing_object::get_value(obj, &v);
5273    return v.s;
5274 }
5275 
5276 #define BYTE_CACHE_FIELDS_DO(macro) \
5277   macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true)
5278 
5279 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) {
5280   guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5281   BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5282 }
5283 
5284 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) {
5285   oop base = ik->static_field_base_raw();
5286   return objArrayOop(base->obj_field(_static_cache_offset));
5287 }
5288 
5289 Symbol* java_lang_Byte_ByteCache::symbol() {
5290   return vmSymbols::java_lang_Byte_ByteCache();
5291 }
5292 
5293 #if INCLUDE_CDS
5294 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) {
5295   BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5296 }
5297 #endif
5298 #undef BYTE_CACHE_FIELDS_DO
5299 
5300 jbyte java_lang_Byte::value(oop obj) {
5301    jvalue v;
5302    java_lang_boxing_object::get_value(obj, &v);
5303    return v.b;
5304 }
5305 
5306 int java_lang_Boolean::_static_TRUE_offset;
5307 int java_lang_Boolean::_static_FALSE_offset;
5308 
5309 #define BOOLEAN_FIELDS_DO(macro) \
5310   macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \
5311   macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true)
5312 
5313 
5314 void java_lang_Boolean::compute_offsets(InstanceKlass *k) {
5315   guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5316   BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5317 }
5318 
5319 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) {
5320   oop base = ik->static_field_base_raw();
5321   return base->obj_field(_static_TRUE_offset);
5322 }
5323 
5324 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) {
5325   oop base = ik->static_field_base_raw();
5326   return base->obj_field(_static_FALSE_offset);
5327 }
5328 
5329 Symbol* java_lang_Boolean::symbol() {
5330   return vmSymbols::java_lang_Boolean();
5331 }
5332 
5333 #if INCLUDE_CDS
5334 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) {
5335   BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5336 }
5337 #endif
5338 #undef BOOLEAN_CACHE_FIELDS_DO
5339 
5340 jboolean java_lang_Boolean::value(oop obj) {
5341    jvalue v;
5342    java_lang_boxing_object::get_value(obj, &v);
5343    return v.z;
5344 }
5345 
5346 // java_lang_reflect_RecordComponent
5347 
5348 int java_lang_reflect_RecordComponent::_clazz_offset;
5349 int java_lang_reflect_RecordComponent::_name_offset;
5350 int java_lang_reflect_RecordComponent::_type_offset;
5351 int java_lang_reflect_RecordComponent::_accessor_offset;
5352 int java_lang_reflect_RecordComponent::_signature_offset;
5353 int java_lang_reflect_RecordComponent::_annotations_offset;
5354 int java_lang_reflect_RecordComponent::_typeAnnotations_offset;
5355 
5356 #define RECORDCOMPONENT_FIELDS_DO(macro) \
5357   macro(_clazz_offset,       k, "clazz",       class_signature,  false); \
5358   macro(_name_offset,        k, "name",        string_signature, false); \
5359   macro(_type_offset,        k, "type",        class_signature,  false); \
5360   macro(_accessor_offset,    k, "accessor",    reflect_method_signature, false); \
5361   macro(_signature_offset,   k, "signature",   string_signature, false); \
5362   macro(_annotations_offset, k, "annotations", byte_array_signature,     false); \
5363   macro(_typeAnnotations_offset, k, "typeAnnotations", byte_array_signature, false);
5364 
5365 // Support for java_lang_reflect_RecordComponent
5366 void java_lang_reflect_RecordComponent::compute_offsets() {
5367   InstanceKlass* k = vmClasses::RecordComponent_klass();
5368   RECORDCOMPONENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5369 }
5370 
5371 #if INCLUDE_CDS
5372 void java_lang_reflect_RecordComponent::serialize_offsets(SerializeClosure* f) {
5373   RECORDCOMPONENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5374 }
5375 #endif
5376 
5377 void java_lang_reflect_RecordComponent::set_clazz(oop element, oop value) {
5378   element->obj_field_put(_clazz_offset, value);
5379 }
5380 
5381 void java_lang_reflect_RecordComponent::set_name(oop element, oop value) {
5382   element->obj_field_put(_name_offset, value);
5383 }
5384 
5385 void java_lang_reflect_RecordComponent::set_type(oop element, oop value) {
5386   element->obj_field_put(_type_offset, value);
5387 }
5388 
5389 void java_lang_reflect_RecordComponent::set_accessor(oop element, oop value) {
5390   element->obj_field_put(_accessor_offset, value);
5391 }
5392 
5393 void java_lang_reflect_RecordComponent::set_signature(oop element, oop value) {
5394   element->obj_field_put(_signature_offset, value);
5395 }
5396 
5397 void java_lang_reflect_RecordComponent::set_annotations(oop element, oop value) {
5398   element->obj_field_put(_annotations_offset, value);
5399 }
5400 
5401 void java_lang_reflect_RecordComponent::set_typeAnnotations(oop element, oop value) {
5402   element->obj_field_put(_typeAnnotations_offset, value);
5403 }
5404 
5405 // java_lang_InternalError
5406 int java_lang_InternalError::_during_unsafe_access_offset;
5407 
5408 void java_lang_InternalError::set_during_unsafe_access(oop internal_error) {
5409   internal_error->bool_field_put(_during_unsafe_access_offset, true);
5410 }
5411 
5412 jboolean java_lang_InternalError::during_unsafe_access(oop internal_error) {
5413   return internal_error->bool_field(_during_unsafe_access_offset);
5414 }
5415 
5416 void java_lang_InternalError::compute_offsets() {
5417   INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
5418 }
5419 
5420 #if INCLUDE_CDS
5421 void java_lang_InternalError::serialize_offsets(SerializeClosure* f) {
5422   INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
5423 }
5424 #endif
5425 
5426 #define BASIC_JAVA_CLASSES_DO_PART1(f) \
5427   f(java_lang_Class) \
5428   f(java_lang_String) \
5429   f(java_lang_ref_Reference) \
5430   //end
5431 
5432 #define BASIC_JAVA_CLASSES_DO_PART2(f) \
5433   f(java_lang_System) \
5434   f(java_lang_ClassLoader) \
5435   f(java_lang_Throwable) \
5436   f(java_lang_Thread) \
5437   f(java_lang_Thread_FieldHolder) \
5438   f(java_lang_Thread_Constants) \
5439   f(java_lang_ThreadGroup) \
5440   f(java_lang_VirtualThread) \
5441   f(java_lang_InternalError) \
5442   f(java_lang_AssertionStatusDirectives) \
5443   f(java_lang_ref_SoftReference) \
5444   f(java_lang_invoke_MethodHandle) \
5445   f(java_lang_invoke_DirectMethodHandle) \
5446   f(java_lang_invoke_MemberName) \
5447   f(java_lang_invoke_ResolvedMethodName) \
5448   f(java_lang_invoke_LambdaForm) \
5449   f(java_lang_invoke_MethodType) \
5450   f(java_lang_invoke_CallSite) \
5451   f(java_lang_invoke_ConstantCallSite) \
5452   f(java_lang_reflect_AccessibleObject) \
5453   f(java_lang_reflect_Method) \
5454   f(java_lang_reflect_Constructor) \
5455   f(java_lang_reflect_Field) \
5456   f(java_lang_reflect_RecordComponent) \
5457   f(reflect_ConstantPool) \
5458   f(java_lang_reflect_Parameter) \
5459   f(java_lang_Module) \
5460   f(java_lang_StackTraceElement) \
5461   f(java_lang_ClassFrameInfo) \
5462   f(java_lang_StackFrameInfo) \
5463   f(java_lang_LiveStackFrameInfo) \
5464   f(jdk_internal_vm_ContinuationScope) \
5465   f(jdk_internal_vm_Continuation) \
5466   f(jdk_internal_vm_StackChunk) \
5467   f(java_util_concurrent_locks_AbstractOwnableSynchronizer) \
5468   f(jdk_internal_foreign_abi_NativeEntryPoint) \
5469   f(jdk_internal_foreign_abi_ABIDescriptor) \
5470   f(jdk_internal_foreign_abi_VMStorage) \
5471   f(jdk_internal_foreign_abi_CallConv) \
5472   f(jdk_internal_misc_UnsafeConstants) \
5473   f(java_lang_boxing_object) \
5474   f(vector_VectorPayload) \
5475   //end
5476 
5477 #define BASIC_JAVA_CLASSES_DO(f) \
5478         BASIC_JAVA_CLASSES_DO_PART1(f) \
5479         BASIC_JAVA_CLASSES_DO_PART2(f)
5480 
5481 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
5482 
5483 // Compute field offsets of all the classes in this file
5484 void JavaClasses::compute_offsets() {
5485   if (CDSConfig::is_using_archive()) {
5486     JVMTI_ONLY(assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
5487                                                          JvmtiExport::has_early_class_hook_env()),
5488                       "JavaClasses::compute_offsets() must be called in early JVMTI phase."));
5489     // None of the classes used by the rest of this function can be replaced by
5490     // JVMTI ClassFileLoadHook.
5491     // We are safe to use the archived offsets, which have already been restored
5492     // by JavaClasses::serialize_offsets, without computing the offsets again.
5493     return;
5494   }
5495 
5496   // We have already called the compute_offsets() of the
5497   // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String, java_lang_Class and
5498   // java_lang_ref_Reference) earlier inside vmClasses::resolve_all()
5499   BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
5500 }
5501 
5502 #if INCLUDE_CDS
5503 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
5504 
5505 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
5506   BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
5507 }
5508 #endif
5509 
5510 #if INCLUDE_CDS_JAVA_HEAP
5511 bool JavaClasses::is_supported_for_archiving(oop obj) {
5512   Klass* klass = obj->klass();
5513 
5514   if (!CDSConfig::is_dumping_method_handles()) {
5515     // These are supported by CDS only when CDSConfig::is_dumping_method_handles() is enabled.
5516     if (klass == vmClasses::ResolvedMethodName_klass() ||
5517         klass == vmClasses::MemberName_klass()) {
5518       return false;
5519     }
5520   }
5521 
5522   if (!AOTReferenceObjSupport::is_enabled() && klass->is_subclass_of(vmClasses::Reference_klass())) {
5523     return false;
5524   }
5525 
5526   return true;
5527 }
5528 #endif
5529 
5530 #ifndef PRODUCT
5531 
5532 // These functions exist to assert the validity of de-serialized offsets in boxing object as a sanity check.
5533 
5534 bool JavaClasses::check_offset(const char *klass_name, int deserialized_offset, const char *field_name,
5535                                const char* field_sig) {
5536   EXCEPTION_MARK;
5537   fieldDescriptor fd;
5538   TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name);
5539   Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
5540   InstanceKlass* ik = InstanceKlass::cast(k);
5541   TempNewSymbol f_name = SymbolTable::new_symbol(field_name);
5542   TempNewSymbol f_sig  = SymbolTable::new_symbol(field_sig);
5543   if (!ik->find_local_field(f_name, f_sig, &fd)) {
5544     tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
5545     return false;
5546   }
5547   if (fd.is_static()) {
5548     tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
5549     return false;
5550   }
5551   if (fd.offset() == deserialized_offset ) {
5552     return true;
5553   } else {
5554     tty->print_cr("Offset of nonstatic field %s.%s is deserialized as %d but should really be %d.",
5555                   klass_name, field_name, deserialized_offset, fd.offset());
5556     return false;
5557   }
5558 }
5559 
5560 void JavaClasses::check_offsets() {
5561   bool valid = true;
5562 
5563 #define CHECK_OFFSET(klass_name, type, field_sig) \
5564   valid &= check_offset(klass_name, java_lang_boxing_object::value_offset(type), "value", field_sig)
5565 
5566   CHECK_OFFSET("java/lang/Boolean",   T_BOOLEAN, "Z");
5567   CHECK_OFFSET("java/lang/Character", T_CHAR,    "C");
5568   CHECK_OFFSET("java/lang/Float",     T_FLOAT,   "F");
5569   CHECK_OFFSET("java/lang/Double",    T_DOUBLE,  "D");
5570   CHECK_OFFSET("java/lang/Byte",      T_BYTE,    "B");
5571   CHECK_OFFSET("java/lang/Short",     T_SHORT,   "S");
5572   CHECK_OFFSET("java/lang/Integer",   T_INT,     "I");
5573   CHECK_OFFSET("java/lang/Long",      T_LONG,    "J");
5574 
5575   if (!valid) vm_exit_during_initialization("Field offset verification failed");
5576 }
5577 
5578 #endif // PRODUCT
5579 
5580 int InjectedField::compute_offset() {
5581   InstanceKlass* ik = klass();
5582   for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5583     if (!may_be_java && !fs.field_flags().is_injected()) {
5584       // Only look at injected fields
5585       continue;
5586     }
5587     if (fs.name() == name() && fs.signature() == signature()) {
5588       return fs.offset();
5589     }
5590   }
5591   ResourceMark rm;
5592   tty->print_cr("Invalid layout of %s at %s/%s%s", ik->external_name(), name()->as_C_string(), signature()->as_C_string(), may_be_java ? " (may_be_java)" : "");
5593 #ifndef PRODUCT
5594   ik->print();
5595   tty->print_cr("all fields:");
5596   for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5597     tty->print_cr("  name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_field_flags());
5598   }
5599 #endif //PRODUCT
5600   vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
5601   return -1;
5602 }
5603 
5604 void javaClasses_init() {
5605   JavaClasses::compute_offsets();
5606   JavaClasses::check_offsets();
5607 }