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