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/archiveBuilder.hpp"
  26 #include "cds/archiveHeapLoader.hpp"
  27 #include "cds/cdsConfig.hpp"
  28 #include "cds/heapShared.hpp"
  29 #include "cds/metaspaceShared.hpp"
  30 #include "classfile/altHashing.hpp"
  31 #include "classfile/classLoaderData.inline.hpp"
  32 #include "classfile/javaClasses.inline.hpp"
  33 #include "classfile/javaClassesImpl.hpp"
  34 #include "classfile/javaThreadStatus.hpp"
  35 #include "classfile/moduleEntry.hpp"
  36 #include "classfile/stringTable.hpp"
  37 #include "classfile/symbolTable.hpp"
  38 #include "classfile/systemDictionary.hpp"
  39 #include "classfile/vmClasses.hpp"
  40 #include "classfile/vmSymbols.hpp"
  41 #include "code/debugInfo.hpp"
  42 #include "code/dependencyContext.hpp"
  43 #include "code/pcDesc.hpp"
  44 #include "gc/shared/collectedHeap.inline.hpp"
  45 #include "interpreter/interpreter.hpp"
  46 #include "interpreter/linkResolver.hpp"
  47 #include "jvm.h"
  48 #include "logging/log.hpp"
  49 #include "logging/logStream.hpp"
  50 #include "memory/oopFactory.hpp"
  51 #include "memory/resourceArea.hpp"
  52 #include "memory/universe.hpp"
  53 #include "oops/fieldInfo.hpp"
  54 #include "oops/fieldStreams.inline.hpp"
  55 #include "oops/instanceKlass.inline.hpp"
  56 #include "oops/instanceMirrorKlass.hpp"
  57 #include "oops/klass.hpp"
  58 #include "oops/klass.inline.hpp"
  59 #include "oops/method.inline.hpp"
  60 #include "oops/objArrayKlass.hpp"
  61 #include "oops/objArrayOop.inline.hpp"
  62 #include "oops/oopCast.inline.hpp"
  63 #include "oops/oop.inline.hpp"
  64 #include "oops/symbol.hpp"
  65 #include "oops/recordComponent.hpp"
  66 #include "oops/typeArrayOop.inline.hpp"
  67 #include "prims/jvmtiExport.hpp"
  68 #include "prims/methodHandles.hpp"
  69 #include "prims/resolvedMethodTable.hpp"
  70 #include "runtime/continuationEntry.inline.hpp"
  71 #include "runtime/continuationJavaClasses.inline.hpp"
  72 #include "runtime/fieldDescriptor.inline.hpp"
  73 #include "runtime/frame.inline.hpp"
  74 #include "runtime/handles.inline.hpp"
  75 #include "runtime/handshake.hpp"
  76 #include "runtime/init.hpp"
  77 #include "runtime/interfaceSupport.inline.hpp"
  78 #include "runtime/java.hpp"
  79 #include "runtime/javaCalls.hpp"
  80 #include "runtime/javaThread.hpp"
  81 #include "runtime/jniHandles.inline.hpp"
  82 #include "runtime/reflectionUtils.hpp"
  83 #include "runtime/safepoint.hpp"
  84 #include "runtime/safepointVerifiers.hpp"
  85 #include "runtime/threadSMR.hpp"
  86 #include "runtime/vframe.inline.hpp"
  87 #include "runtime/vm_version.hpp"
  88 #include "utilities/align.hpp"
  89 #include "utilities/globalDefinitions.hpp"
  90 #include "utilities/growableArray.hpp"
  91 #include "utilities/preserveException.hpp"
  92 #include "utilities/utf8.hpp"
  93 #if INCLUDE_JVMCI
  94 #include "jvmci/jvmciJavaClasses.hpp"
  95 #endif
  96 
  97 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java)           \
  98   { VM_CLASS_ID(klass), VM_SYMBOL_ENUM_NAME(name##_name), VM_SYMBOL_ENUM_NAME(signature), may_be_java },
  99 
 100 InjectedField JavaClasses::_injected_fields[] = {
 101   ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
 102 };
 103 
 104 // Register native methods of Object
 105 void java_lang_Object::register_natives(TRAPS) {
 106   InstanceKlass* obj = vmClasses::Object_klass();
 107   Method::register_native(obj, vmSymbols::hashCode_name(),
 108                           vmSymbols::void_int_signature(), (address) &JVM_IHashCode, CHECK);
 109   Method::register_native(obj, vmSymbols::wait_name(),
 110                           vmSymbols::long_void_signature(), (address) &JVM_MonitorWait, CHECK);
 111   Method::register_native(obj, vmSymbols::notify_name(),
 112                           vmSymbols::void_method_signature(), (address) &JVM_MonitorNotify, CHECK);
 113   Method::register_native(obj, vmSymbols::notifyAll_name(),
 114                           vmSymbols::void_method_signature(), (address) &JVM_MonitorNotifyAll, CHECK);
 115   Method::register_native(obj, vmSymbols::clone_name(),
 116                           vmSymbols::void_object_signature(), (address) &JVM_Clone, THREAD);
 117 }
 118 
 119 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
 120   return _injected_fields[(int)id].compute_offset();
 121 }
 122 
 123 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
 124   *field_count = 0;
 125 
 126   vmSymbolID sid = vmSymbols::find_sid(class_name);
 127   if (sid == vmSymbolID::NO_SID) {
 128     // Only well known classes can inject fields
 129     return nullptr;
 130   }
 131 
 132   int count = 0;
 133   int start = -1;
 134 
 135 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
 136   if (sid == VM_SYMBOL_ENUM_NAME(klass)) {                         \
 137     count++;                                                       \
 138     if (start == -1) {                                             \
 139       start = (int)InjectedFieldID::klass##_##name##_enum;         \
 140     }                                                              \
 141   }
 142   ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
 143 #undef LOOKUP_INJECTED_FIELD
 144 
 145   if (start != -1) {
 146     *field_count = count;
 147     return _injected_fields + start;
 148   }
 149   return nullptr;
 150 }
 151 
 152 
 153 // Helpful routine for computing field offsets at run time rather than hardcoding them
 154 // Finds local fields only, including static fields.  Static field offsets are from the
 155 // beginning of the mirror.
 156 void JavaClasses::compute_offset(int &dest_offset,
 157                                  InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
 158                                  bool is_static) {
 159   fieldDescriptor fd;
 160   if (ik == nullptr) {
 161     ResourceMark rm;
 162     log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string());
 163     vm_exit_during_initialization("Invalid layout of well-known class");
 164   }
 165 
 166   if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) {
 167     ResourceMark rm;
 168     log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(),
 169                      name_symbol->as_C_string(), signature_symbol->as_C_string());
 170 #ifndef PRODUCT
 171     // Prints all fields and offsets
 172     Log(class) lt;
 173     LogStream ls(lt.error());
 174     ik->print_on(&ls);
 175 #endif //PRODUCT
 176     vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
 177   }
 178   dest_offset = fd.offset();
 179 }
 180 
 181 // Overloading to pass name as a string.
 182 void JavaClasses::compute_offset(int& dest_offset, InstanceKlass* ik,
 183                                  const char* name_string, Symbol* signature_symbol,
 184                                  bool is_static) {
 185   TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string));
 186   if (name == nullptr) {
 187     ResourceMark rm;
 188     log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string);
 189     vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name());
 190   }
 191   compute_offset(dest_offset, ik, name, signature_symbol, is_static);
 192 }
 193 
 194 // java_lang_String
 195 
 196 int java_lang_String::_value_offset;
 197 int java_lang_String::_hash_offset;
 198 int java_lang_String::_hashIsZero_offset;
 199 int java_lang_String::_coder_offset;
 200 int java_lang_String::_flags_offset;
 201 
 202 bool java_lang_String::_initialized;
 203 
 204 
 205 bool java_lang_String::test_and_set_flag(oop java_string, uint8_t flag_mask) {
 206   uint8_t* addr = flags_addr(java_string);
 207   uint8_t value = Atomic::load(addr);
 208   while ((value & flag_mask) == 0) {
 209     uint8_t old_value = value;
 210     value |= flag_mask;
 211     value = Atomic::cmpxchg(addr, old_value, value);
 212     if (value == old_value) return false; // Flag bit changed from 0 to 1.
 213   }
 214   return true;                  // Flag bit is already 1.
 215 }
 216 
 217 #define STRING_FIELDS_DO(macro) \
 218   macro(_value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \
 219   macro(_hash_offset,  k, "hash",                  int_signature,        false); \
 220   macro(_hashIsZero_offset, k, "hashIsZero",       bool_signature,       false); \
 221   macro(_coder_offset, k, "coder",                 byte_signature,       false);
 222 
 223 void java_lang_String::compute_offsets() {
 224   if (_initialized) {
 225     return;
 226   }
 227 
 228   InstanceKlass* k = vmClasses::String_klass();
 229   STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
 230   STRING_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
 231 
 232   _initialized = true;
 233 }
 234 
 235 #if INCLUDE_CDS
 236 void java_lang_String::serialize_offsets(SerializeClosure* f) {
 237   STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
 238   STRING_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
 239   f->do_bool(&_initialized);
 240 }
 241 #endif
 242 
 243 class CompactStringsFixup : public FieldClosure {
 244 private:
 245   bool _value;
 246 
 247 public:
 248   CompactStringsFixup(bool value) : _value(value) {}
 249 
 250   void do_field(fieldDescriptor* fd) {
 251     if (fd->name() == vmSymbols::compact_strings_name()) {
 252       oop mirror = fd->field_holder()->java_mirror();
 253       assert(fd->field_holder() == vmClasses::String_klass(), "Should be String");
 254       assert(mirror != nullptr, "String must have mirror already");
 255       mirror->bool_field_put(fd->offset(), _value);
 256     }
 257   }
 258 };
 259 
 260 void java_lang_String::set_compact_strings(bool value) {
 261   CompactStringsFixup fix(value);
 262   vmClasses::String_klass()->do_local_static_fields(&fix);
 263 }
 264 
 265 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
 266   assert(_initialized, "Must be initialized");
 267   assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
 268 
 269   // Create the String object first, so there's a chance that the String
 270   // and the char array it points to end up in the same cache line.
 271   oop obj;
 272   obj = vmClasses::String_klass()->allocate_instance(CHECK_NH);
 273 
 274   // Create the char array.  The String object must be handlized here
 275   // because GC can happen as a result of the allocation attempt.
 276   Handle h_obj(THREAD, obj);
 277   int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
 278   typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
 279 
 280   // Point the String at the char array
 281   obj = h_obj();
 282   set_value(obj, buffer);
 283   // No need to zero the offset, allocation zero'ed the entire String object
 284   set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
 285   return h_obj;
 286 }
 287 
 288 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) {
 289   bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
 290   Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
 291   typeArrayOop buffer = value(h_obj());
 292   assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
 293   if (is_latin1) {
 294     for (int index = 0; index < length; index++) {
 295       buffer->byte_at_put(index, (jbyte)unicode[index]);
 296     }
 297   } else {
 298     for (int index = 0; index < length; index++) {
 299       buffer->char_at_put(index, unicode[index]);
 300     }
 301   }
 302 
 303 #ifdef ASSERT
 304   {
 305     ResourceMark rm;
 306     size_t utf8_len = static_cast<size_t>(length);
 307     char* expected = UNICODE::as_utf8(unicode, utf8_len);
 308     char* actual = as_utf8_string(h_obj());
 309     if (strcmp(expected, actual) != 0) {
 310       fatal("Unicode conversion failure: %s --> %s", expected, actual);
 311     }
 312   }
 313 #endif
 314 
 315   return h_obj;
 316 }
 317 
 318 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) {
 319   Handle h_obj = create_from_unicode(unicode, length, CHECK_NULL);
 320   return h_obj();
 321 }
 322 
 323 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
 324   if (utf8_str == nullptr) {
 325     return Handle();
 326   }
 327   bool has_multibyte, is_latin1;
 328   int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
 329   if (!CompactStrings) {
 330     has_multibyte = true;
 331     is_latin1 = false;
 332   }
 333 
 334   Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
 335   if (length > 0) {
 336     if (!has_multibyte) {
 337       const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
 338       ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
 339     } else if (is_latin1) {
 340       UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
 341     } else {
 342       UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
 343     }
 344   }
 345 
 346 #ifdef ASSERT
 347   // This check is too strict when the input string is not a valid UTF8.
 348   // For example, it may be created with arbitrary content via jni_NewStringUTF.
 349   if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, strlen(utf8_str), /*version_leq_47*/false)) {
 350     ResourceMark rm;
 351     const char* expected = utf8_str;
 352     char* actual = as_utf8_string(h_obj());
 353     if (strcmp(expected, actual) != 0) {
 354       fatal("String conversion failure: %s --> %s", expected, actual);
 355     }
 356   }
 357 #endif
 358 
 359   return h_obj;
 360 }
 361 
 362 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
 363   Handle h_obj = create_from_str(utf8_str, CHECK_NULL);
 364   return h_obj();
 365 }
 366 
 367 Handle java_lang_String::create_from_symbol(const Symbol* symbol, TRAPS) {
 368   const char* utf8_str = (char*)symbol->bytes();
 369   int utf8_len = symbol->utf8_length();
 370 
 371   bool has_multibyte, is_latin1;
 372   int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
 373   if (!CompactStrings) {
 374     has_multibyte = true;
 375     is_latin1 = false;
 376   }
 377 
 378   Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
 379   if (length > 0) {
 380     if (!has_multibyte) {
 381       const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
 382       ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
 383     } else if (is_latin1) {
 384       UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
 385     } else {
 386       UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
 387     }
 388   }
 389 
 390 #ifdef ASSERT
 391   // This check is too strict on older classfile versions
 392   if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, utf8_len, /*version_leq_47*/false))
 393   {
 394     ResourceMark rm;
 395     const char* expected = symbol->as_utf8();
 396     char* actual = as_utf8_string(h_obj());
 397     if (strncmp(expected, actual, utf8_len) != 0) {
 398       fatal("Symbol conversion failure: %s --> %s", expected, actual);
 399     }
 400   }
 401 #endif
 402 
 403   return h_obj;
 404 }
 405 
 406 // Converts a C string to a Java String based on current encoding
 407 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
 408   assert(str != nullptr, "bad arguments");
 409 
 410   typedef jstring (JNICALL *to_java_string_fn_t)(JNIEnv*, const char *);
 411   static to_java_string_fn_t _to_java_string_fn = nullptr;
 412 
 413   if (_to_java_string_fn == nullptr) {
 414     void *lib_handle = os::native_java_library();
 415     _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "JNU_NewStringPlatform"));
 416     if (_to_java_string_fn == nullptr) {
 417       fatal("JNU_NewStringPlatform missing");
 418     }
 419   }
 420 
 421   jstring js = nullptr;
 422   {
 423     JavaThread* thread = THREAD;
 424     HandleMark hm(thread);
 425     ThreadToNativeFromVM ttn(thread);
 426     js = (_to_java_string_fn)(thread->jni_environment(), str);
 427   }
 428 
 429   Handle native_platform_string(THREAD, JNIHandles::resolve(js));
 430   JNIHandles::destroy_local(js);  // destroy local JNIHandle.
 431   return native_platform_string;
 432 }
 433 
 434 // Converts a Java String to a native C string that can be used for
 435 // native OS calls.
 436 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
 437   typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
 438   static to_platform_string_fn_t _to_platform_string_fn = nullptr;
 439 
 440   if (_to_platform_string_fn == nullptr) {
 441     void *lib_handle = os::native_java_library();
 442     _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
 443     if (_to_platform_string_fn == nullptr) {
 444       fatal("GetStringPlatformChars missing");
 445     }
 446   }
 447 
 448   char *native_platform_string;
 449   jstring js;
 450   { JavaThread* thread = THREAD;
 451     js = (jstring) JNIHandles::make_local(thread, java_string());
 452     HandleMark hm(thread);
 453     ThreadToNativeFromVM ttn(thread);
 454     JNIEnv *env = thread->jni_environment();
 455     bool is_copy;
 456     native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
 457     assert(is_copy == JNI_TRUE, "is_copy value changed");
 458   }
 459 
 460   // Uses a store barrier and therefore needs to be in vm state
 461   JNIHandles::destroy_local(js);
 462 
 463   return native_platform_string;
 464 }
 465 
 466 Handle java_lang_String::externalize_classname(Symbol* java_name, TRAPS) {
 467   ResourceMark rm(THREAD);
 468   return create_from_str(java_name->as_klass_external_name(), THREAD);
 469 }
 470 
 471 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
 472   jchar* result = as_unicode_string_or_null(java_string, length);
 473   if (result == nullptr) {
 474     THROW_MSG_NULL(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
 475   }
 476   return result;
 477 }
 478 
 479 jchar* java_lang_String::as_unicode_string_or_null(oop java_string, int& length) {
 480   typeArrayOop value  = java_lang_String::value(java_string);
 481                length = java_lang_String::length(java_string, value);
 482   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 483 
 484   jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
 485   if (result != nullptr) {
 486     if (!is_latin1) {
 487       for (int index = 0; index < length; index++) {
 488         result[index] = value->char_at(index);
 489       }
 490     } else {
 491       for (int index = 0; index < length; index++) {
 492         result[index] = ((jchar) value->byte_at(index)) & 0xff;
 493       }
 494     }
 495   }
 496   return result;
 497 }
 498 
 499 inline unsigned int java_lang_String::hash_code_impl(oop java_string, bool update) {
 500   // The hash and hashIsZero fields are subject to a benign data race,
 501   // making it crucial to ensure that any observable result of the
 502   // calculation in this method stays correct under any possible read of
 503   // these fields. Necessary restrictions to allow this to be correct
 504   // without explicit memory fences or similar concurrency primitives is
 505   // that we can ever only write to one of these two fields for a given
 506   // String instance, and that the computation is idempotent and derived
 507   // from immutable state
 508   assert(_initialized && (_hash_offset > 0) && (_hashIsZero_offset > 0), "Must be initialized");
 509   if (java_lang_String::hash_is_set(java_string)) {
 510     return java_string->int_field(_hash_offset);
 511   }
 512 
 513   typeArrayOop value = java_lang_String::value(java_string);
 514   int         length = java_lang_String::length(java_string, value);
 515   bool     is_latin1 = java_lang_String::is_latin1(java_string);
 516 
 517   unsigned int hash = 0;
 518   if (length > 0) {
 519     if (is_latin1) {
 520       hash = java_lang_String::hash_code(value->byte_at_addr(0), length);
 521     } else {
 522       hash = java_lang_String::hash_code(value->char_at_addr(0), length);
 523     }
 524   }
 525 
 526   if (update) {
 527     if (hash != 0) {
 528       java_string->int_field_put(_hash_offset, hash);
 529     } else {
 530       java_string->bool_field_put(_hashIsZero_offset, true);
 531     }
 532   }
 533   return hash;
 534 }
 535 
 536 unsigned int java_lang_String::hash_code(oop java_string) {
 537   return hash_code_impl(java_string, /*update=*/true);
 538 }
 539 
 540 unsigned int java_lang_String::hash_code_noupdate(oop java_string) {
 541   return hash_code_impl(java_string, /*update=*/false);
 542 }
 543 
 544 
 545 char* java_lang_String::as_quoted_ascii(oop java_string) {
 546   typeArrayOop value  = java_lang_String::value(java_string);
 547   int          length = java_lang_String::length(java_string, value);
 548   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 549 
 550   if (length == 0) return nullptr;
 551 
 552   char* result;
 553   size_t result_length;
 554   if (!is_latin1) {
 555     jchar* base = value->char_at_addr(0);
 556     result_length = UNICODE::quoted_ascii_length(base, length) + 1;
 557     result = NEW_RESOURCE_ARRAY(char, result_length);
 558     UNICODE::as_quoted_ascii(base, length, result, result_length);
 559   } else {
 560     jbyte* base = value->byte_at_addr(0);
 561     result_length = UNICODE::quoted_ascii_length(base, length) + 1;
 562     result = NEW_RESOURCE_ARRAY(char, result_length);
 563     UNICODE::as_quoted_ascii(base, length, result, result_length);
 564   }
 565   assert(result_length >= (size_t)length + 1, "must not be shorter");
 566   assert(result_length == strlen(result) + 1, "must match");
 567   return result;
 568 }
 569 
 570 Symbol* java_lang_String::as_symbol(oop java_string) {
 571   typeArrayOop value  = java_lang_String::value(java_string);
 572   int          length = java_lang_String::length(java_string, value);
 573   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 574   if (!is_latin1) {
 575     jchar* base = (length == 0) ? nullptr : value->char_at_addr(0);
 576     Symbol* sym = SymbolTable::new_symbol(base, length);
 577     return sym;
 578   } else {
 579     ResourceMark rm;
 580     jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
 581     size_t utf8_len = static_cast<size_t>(length);
 582     const char* base = UNICODE::as_utf8(position, utf8_len);
 583     Symbol* sym = SymbolTable::new_symbol(base, checked_cast<int>(utf8_len));
 584     return sym;
 585   }
 586 }
 587 
 588 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
 589   typeArrayOop value  = java_lang_String::value(java_string);
 590   int          length = java_lang_String::length(java_string, value);
 591   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 592   if (!is_latin1) {
 593     jchar* base = (length == 0) ? nullptr : value->char_at_addr(0);
 594     return SymbolTable::probe_unicode(base, length);
 595   } else {
 596     ResourceMark rm;
 597     jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
 598     size_t utf8_len = static_cast<size_t>(length);
 599     const char* base = UNICODE::as_utf8(position, utf8_len);
 600     return SymbolTable::probe(base, checked_cast<int>(utf8_len));
 601   }
 602 }
 603 
 604 size_t java_lang_String::utf8_length(oop java_string, typeArrayOop value) {
 605   assert(value_equals(value, java_lang_String::value(java_string)),
 606          "value must be same as java_lang_String::value(java_string)");
 607   int length = java_lang_String::length(java_string, value);
 608   if (length == 0) {
 609     return 0;
 610   }
 611   if (!java_lang_String::is_latin1(java_string)) {
 612     return UNICODE::utf8_length(value->char_at_addr(0), length);
 613   } else {
 614     return UNICODE::utf8_length(value->byte_at_addr(0), length);
 615   }
 616 }
 617 
 618 size_t java_lang_String::utf8_length(oop java_string) {
 619   typeArrayOop value = java_lang_String::value(java_string);
 620   return utf8_length(java_string, value);
 621 }
 622 
 623 int java_lang_String::utf8_length_as_int(oop java_string) {
 624   typeArrayOop value = java_lang_String::value(java_string);
 625   return utf8_length_as_int(java_string, value);
 626 }
 627 
 628 int java_lang_String::utf8_length_as_int(oop java_string, typeArrayOop value) {
 629   assert(value_equals(value, java_lang_String::value(java_string)),
 630          "value must be same as java_lang_String::value(java_string)");
 631   int length = java_lang_String::length(java_string, value);
 632   if (length == 0) {
 633     return 0;
 634   }
 635   if (!java_lang_String::is_latin1(java_string)) {
 636     return UNICODE::utf8_length_as_int(value->char_at_addr(0), length);
 637   } else {
 638     return UNICODE::utf8_length_as_int(value->byte_at_addr(0), length);
 639   }
 640 }
 641 
 642 char* java_lang_String::as_utf8_string(oop java_string) {
 643   size_t length;
 644   return as_utf8_string(java_string, length);
 645 }
 646 
 647 char* java_lang_String::as_utf8_string(oop java_string, size_t& length) {
 648   typeArrayOop value = java_lang_String::value(java_string);
 649   // `length` is used as the incoming number of characters to
 650   // convert, and then set as the number of bytes in the UTF8 sequence.
 651   length             = java_lang_String::length(java_string, value);
 652   bool     is_latin1 = java_lang_String::is_latin1(java_string);
 653   if (!is_latin1) {
 654     jchar* position = (length == 0) ? nullptr : value->char_at_addr(0);
 655     return UNICODE::as_utf8(position, length);
 656   } else {
 657     jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
 658     return UNICODE::as_utf8(position, length);
 659   }
 660 }
 661 
 662 // Uses a provided buffer if it's sufficiently large, otherwise allocates
 663 // a resource array to fit
 664 char* java_lang_String::as_utf8_string_full(oop java_string, char* buf, size_t buflen, size_t& utf8_len) {
 665   typeArrayOop value = java_lang_String::value(java_string);
 666   int            len = java_lang_String::length(java_string, value);
 667   bool     is_latin1 = java_lang_String::is_latin1(java_string);
 668   if (!is_latin1) {
 669     jchar *position = (len == 0) ? nullptr : value->char_at_addr(0);
 670     utf8_len = UNICODE::utf8_length(position, len);
 671     if (utf8_len >= buflen) {
 672       buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
 673     }
 674     return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
 675   } else {
 676     jbyte *position = (len == 0) ? nullptr : value->byte_at_addr(0);
 677     utf8_len = UNICODE::utf8_length(position, len);
 678     if (utf8_len >= buflen) {
 679       buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
 680     }
 681     return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
 682   }
 683 }
 684 
 685 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, size_t buflen) {
 686   assert(value_equals(value, java_lang_String::value(java_string)),
 687          "value must be same as java_lang_String::value(java_string)");
 688   int     length = java_lang_String::length(java_string, value);
 689   bool is_latin1 = java_lang_String::is_latin1(java_string);
 690   if (!is_latin1) {
 691     jchar* position = (length == 0) ? nullptr : value->char_at_addr(0);
 692     return UNICODE::as_utf8(position, length, buf, buflen);
 693   } else {
 694     jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
 695     return UNICODE::as_utf8(position, length, buf, buflen);
 696   }
 697 }
 698 
 699 char* java_lang_String::as_utf8_string(oop java_string, char* buf, size_t buflen) {
 700   typeArrayOop value = java_lang_String::value(java_string);
 701   return as_utf8_string(java_string, value, buf, buflen);
 702 }
 703 
 704 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
 705   // `length` is used as the incoming number of characters to
 706   // convert, and then set as the number of bytes in the UTF8 sequence.
 707   size_t  length = static_cast<size_t>(len);
 708   typeArrayOop value  = java_lang_String::value(java_string);
 709   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 710   assert(start + len <= java_lang_String::length(java_string), "just checking");
 711   if (!is_latin1) {
 712     jchar* position = value->char_at_addr(start);
 713     return UNICODE::as_utf8(position, length);
 714   } else {
 715     jbyte* position = value->byte_at_addr(start);
 716     return UNICODE::as_utf8(position, length);
 717   }
 718 }
 719 
 720 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, size_t buflen) {
 721   assert(value_equals(value, java_lang_String::value(java_string)),
 722          "value must be same as java_lang_String::value(java_string)");
 723   assert(start + len <= java_lang_String::length(java_string), "just checking");
 724   bool is_latin1 = java_lang_String::is_latin1(java_string);
 725   if (!is_latin1) {
 726     jchar* position = value->char_at_addr(start);
 727     return UNICODE::as_utf8(position, len, buf, buflen);
 728   } else {
 729     jbyte* position = value->byte_at_addr(start);
 730     return UNICODE::as_utf8(position, len, buf, buflen);
 731   }
 732 }
 733 
 734 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) {
 735   assert(java_string->klass() == vmClasses::String_klass(),
 736          "must be java_string");
 737   typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
 738   int length = java_lang_String::length(java_string, value);
 739   if (length != len) {
 740     return false;
 741   }
 742   bool is_latin1 = java_lang_String::is_latin1(java_string);
 743   if (!is_latin1) {
 744     for (int i = 0; i < len; i++) {
 745       if (value->char_at(i) != chars[i]) {
 746         return false;
 747       }
 748     }
 749   } else {
 750     for (int i = 0; i < len; i++) {
 751       if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
 752         return false;
 753       }
 754     }
 755   }
 756   return true;
 757 }
 758 
 759 bool java_lang_String::equals(oop java_string, const char* utf8_string, size_t utf8_len) {
 760   assert(java_string->klass() == vmClasses::String_klass(),
 761          "must be java_string");
 762   typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
 763   int length = java_lang_String::length(java_string, value);
 764   int unicode_length = UTF8::unicode_length(utf8_string, utf8_len);
 765   if (length != unicode_length) {
 766     return false;
 767   }
 768   bool is_latin1 = java_lang_String::is_latin1(java_string);
 769   jchar c;
 770   if (!is_latin1) {
 771     for (int i = 0; i < unicode_length; i++) {
 772       utf8_string = UTF8::next(utf8_string, &c);
 773       if (value->char_at(i) != c) {
 774         return false;
 775       }
 776     }
 777   } else {
 778     for (int i = 0; i < unicode_length; i++) {
 779       utf8_string = UTF8::next(utf8_string, &c);
 780       if ((((jchar) value->byte_at(i)) & 0xff) != c) {
 781         return false;
 782       }
 783     }
 784   }
 785   return true;
 786 }
 787 
 788 bool java_lang_String::equals(oop str1, oop str2) {
 789   assert(str1->klass() == vmClasses::String_klass(),
 790          "must be java String");
 791   assert(str2->klass() == vmClasses::String_klass(),
 792          "must be java String");
 793   typeArrayOop value1    = java_lang_String::value_no_keepalive(str1);
 794   bool         is_latin1 = java_lang_String::is_latin1(str1);
 795   typeArrayOop value2    = java_lang_String::value_no_keepalive(str2);
 796   bool         is_latin2 = java_lang_String::is_latin1(str2);
 797 
 798   if (is_latin1 != is_latin2) {
 799     // Strings with different coders are never equal.
 800     return false;
 801   }
 802   return value_equals(value1, value2);
 803 }
 804 
 805 // Print the given string to the given outputStream, limiting the output to
 806 // at most max_length of the string's characters. If the length exceeds the
 807 // limit we print an abridged version of the string with the "middle" elided
 808 // and replaced by " ... (N characters ommitted) ... ". If max_length is odd
 809 // it is treated as max_length-1.
 810 void java_lang_String::print(oop java_string, outputStream* st, int max_length) {
 811   assert(java_string->klass() == vmClasses::String_klass(), "must be java_string");
 812   // We need at least two characters to print A ... B
 813   assert(max_length > 1, "invalid max_length: %d", max_length);
 814 
 815   typeArrayOop value  = java_lang_String::value_no_keepalive(java_string);
 816 
 817   if (value == nullptr) {
 818     // This can happen if, e.g., printing a String
 819     // object before its initializer has been called
 820     st->print("nullptr");
 821     return;
 822   }
 823 
 824   int length = java_lang_String::length(java_string, value);
 825   bool is_latin1 = java_lang_String::is_latin1(java_string);
 826 
 827   bool abridge = length > max_length;
 828 
 829   st->print("\"");
 830   for (int index = 0; index < length; index++) {
 831     // If we need to abridge and we've printed half the allowed characters
 832     // then jump to the tail of the string.
 833     if (abridge && index >= max_length / 2) {
 834       st->print(" ... (%d characters ommitted) ... ", length - 2 * (max_length / 2));
 835       index = length - (max_length / 2);
 836       abridge = false; // only do this once
 837     }
 838     jchar c = (!is_latin1) ?  value->char_at(index) :
 839                              ((jchar) value->byte_at(index)) & 0xff;
 840     if (c < ' ') {
 841       st->print("\\x%02X", c); // print control characters e.g. \x0A
 842     } else {
 843       st->print("%c", c);
 844     }
 845   }
 846   st->print("\"");
 847 
 848   if (length > max_length) {
 849     st->print(" (abridged) ");
 850   }
 851 }
 852 
 853 // java_lang_Class
 854 
 855 int java_lang_Class::_klass_offset;
 856 int java_lang_Class::_array_klass_offset;
 857 int java_lang_Class::_oop_size_offset;
 858 int java_lang_Class::_static_oop_field_count_offset;
 859 int java_lang_Class::_class_loader_offset;
 860 int java_lang_Class::_module_offset;
 861 int java_lang_Class::_protection_domain_offset;
 862 int java_lang_Class::_component_mirror_offset;
 863 int java_lang_Class::_init_lock_offset;
 864 int java_lang_Class::_signers_offset;
 865 int java_lang_Class::_name_offset;
 866 int java_lang_Class::_source_file_offset;
 867 int java_lang_Class::_classData_offset;
 868 int java_lang_Class::_classRedefinedCount_offset;
 869 int java_lang_Class::_reflectionData_offset;
 870 int java_lang_Class::_modifiers_offset;
 871 int java_lang_Class::_is_primitive_offset;
 872 
 873 bool java_lang_Class::_offsets_computed = false;
 874 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = nullptr;
 875 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = nullptr;
 876 
 877 #ifdef ASSERT
 878 inline static void assert_valid_static_string_field(fieldDescriptor* fd) {
 879   assert(fd->has_initial_value(), "caller should have checked this");
 880   assert(fd->field_type() == T_OBJECT, "caller should have checked this");
 881   assert(fd->signature() == vmSymbols::string_signature(), "just checking");
 882 }
 883 #endif
 884 
 885 static void initialize_static_string_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
 886   DEBUG_ONLY(assert_valid_static_string_field(fd);)
 887   oop string = fd->string_initial_value(CHECK);
 888   mirror()->obj_field_put(fd->offset(), string);
 889 }
 890 
 891 static void initialize_static_primitive_field(fieldDescriptor* fd, Handle mirror) {
 892   assert(fd->has_initial_value(), "caller should have checked this");
 893   BasicType t = fd->field_type();
 894   switch (t) {
 895   case T_BYTE:
 896     mirror()->byte_field_put(fd->offset(), (jbyte)(fd->int_initial_value()));
 897     break;
 898   case T_BOOLEAN:
 899     mirror()->bool_field_put(fd->offset(), (jboolean)(fd->int_initial_value()));
 900     break;
 901   case T_CHAR:
 902     mirror()->char_field_put(fd->offset(), (jchar)(fd->int_initial_value()));
 903     break;
 904   case T_SHORT:
 905     mirror()->short_field_put(fd->offset(), (jshort)(fd->int_initial_value()));
 906     break;
 907   case T_INT:
 908     mirror()->int_field_put(fd->offset(), fd->int_initial_value());
 909     break;
 910   case T_FLOAT:
 911     mirror()->float_field_put(fd->offset(), fd->float_initial_value());
 912     break;
 913   case T_DOUBLE:
 914     mirror()->double_field_put(fd->offset(), fd->double_initial_value());
 915     break;
 916   case T_LONG:
 917     mirror()->long_field_put(fd->offset(), fd->long_initial_value());
 918     break;
 919   default:
 920     // Illegal ConstantValue attribute in class file should have been
 921     // caught during classfile parsing.
 922     ShouldNotReachHere();
 923   }
 924 }
 925 
 926 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
 927   assert(mirror.not_null() && fd->is_static(), "just checking");
 928   if (fd->has_initial_value()) {
 929     if (fd->field_type() != T_OBJECT) {
 930       initialize_static_primitive_field(fd, mirror);
 931     } else {
 932       initialize_static_string_field(fd, mirror, CHECK);
 933     }
 934   }
 935 }
 936 
 937 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
 938   assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
 939 
 940   // If the offset was read from the shared archive, it was fixed up already
 941   if (!k->is_shared()) {
 942     if (k->is_instance_klass()) {
 943       // During bootstrap, java.lang.Class wasn't loaded so static field
 944       // offsets were computed without the size added it.  Go back and
 945       // update all the static field offsets to included the size.
 946 
 947       // Unfortunately, the FieldInfo stream is encoded with UNSIGNED5 which doesn't allow
 948       // content updates. So the FieldInfo stream has to be decompressed into a temporary array,
 949       // static fields offsets are updated in this array before reencoding everything into
 950       // a new UNSIGNED5 stream, and substitute it to the old FieldInfo stream.
 951 
 952       int java_fields;
 953       int injected_fields;
 954       InstanceKlass* ik = InstanceKlass::cast(k);
 955       GrowableArray<FieldInfo>* fields =
 956         FieldInfoStream::create_FieldInfoArray(ik->fieldinfo_stream(),
 957                                                &java_fields, &injected_fields);
 958       for (int i = 0; i < fields->length(); i++) {
 959         FieldInfo* fi = fields->adr_at(i);
 960         if (fi->access_flags().is_static()) {
 961           fi->set_offset(fi->offset() + InstanceMirrorKlass::offset_of_static_fields());
 962         }
 963       }
 964       Array<u1>* old_stream = ik->fieldinfo_stream();
 965       assert(fields->length() == (java_fields + injected_fields), "Must be");
 966       Array<u1>* new_fis = FieldInfoStream::create_FieldInfoStream(fields, java_fields, injected_fields, k->class_loader_data(), CHECK);
 967       ik->set_fieldinfo_stream(new_fis);
 968       MetadataFactory::free_array<u1>(k->class_loader_data(), old_stream);
 969     }
 970   }
 971 
 972   if (k->is_shared() && k->has_archived_mirror_index()) {
 973     if (ArchiveHeapLoader::is_in_use()) {
 974       bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK);
 975       assert(present, "Missing archived mirror for %s", k->external_name());
 976       return;
 977     } else {
 978       k->clear_java_mirror_handle();
 979       k->clear_archived_mirror_index();
 980     }
 981   }
 982   create_mirror(k, Handle(), Handle(), Handle(), Handle(), CHECK);
 983 }
 984 
 985 void java_lang_Class::initialize_mirror_fields(Klass* k,
 986                                                Handle mirror,
 987                                                Handle protection_domain,
 988                                                Handle classData,
 989                                                TRAPS) {
 990   // Allocate a simple java object for a lock.
 991   // This needs to be a java object because during class initialization
 992   // it can be held across a java call.
 993   typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
 994   set_init_lock(mirror(), r);
 995 
 996   // Set protection domain also
 997   set_protection_domain(mirror(), protection_domain());
 998 
 999   // Initialize static fields
1000   InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK);
1001 
1002  // Set classData
1003   set_class_data(mirror(), classData());
1004 }
1005 
1006 // Set the java.lang.Module module field in the java_lang_Class mirror
1007 void java_lang_Class::set_mirror_module_field(JavaThread* current, Klass* k, Handle mirror, Handle module) {
1008   if (module.is_null()) {
1009     // During startup, the module may be null only if java.base has not been defined yet.
1010     // Put the class on the fixup_module_list to patch later when the java.lang.Module
1011     // for java.base is known. But note that since we captured the null module another
1012     // thread may have completed that initialization.
1013 
1014     bool javabase_was_defined = false;
1015     {
1016       MutexLocker m1(current, Module_lock);
1017       // Keep list of classes needing java.base module fixup
1018       if (!ModuleEntryTable::javabase_defined()) {
1019         assert(k->java_mirror() != nullptr, "Class's mirror is null");
1020         k->class_loader_data()->inc_keep_alive_ref_count();
1021         assert(fixup_module_field_list() != nullptr, "fixup_module_field_list not initialized");
1022         fixup_module_field_list()->push(k);
1023       } else {
1024         javabase_was_defined = true;
1025       }
1026     }
1027 
1028     // If java.base was already defined then patch this particular class with java.base.
1029     if (javabase_was_defined) {
1030       ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
1031       assert(javabase_entry != nullptr && javabase_entry->module() != nullptr,
1032              "Setting class module field, " JAVA_BASE_NAME " should be defined");
1033       Handle javabase_handle(current, javabase_entry->module());
1034       set_module(mirror(), javabase_handle());
1035     }
1036   } else {
1037     assert(Universe::is_module_initialized() ||
1038            (ModuleEntryTable::javabase_defined() &&
1039             (module() == ModuleEntryTable::javabase_moduleEntry()->module())),
1040            "Incorrect java.lang.Module specification while creating mirror");
1041     set_module(mirror(), module());
1042   }
1043 }
1044 
1045 // Statically allocate fixup lists because they always get created.
1046 void java_lang_Class::allocate_fixup_lists() {
1047   GrowableArray<Klass*>* mirror_list =
1048     new (mtClass) GrowableArray<Klass*>(40, mtClass);
1049   set_fixup_mirror_list(mirror_list);
1050 
1051   GrowableArray<Klass*>* module_list =
1052     new (mtModule) GrowableArray<Klass*>(500, mtModule);
1053   set_fixup_module_field_list(module_list);
1054 }
1055 
1056 void java_lang_Class::allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData,
1057                                       Handle& mirror, Handle& comp_mirror, TRAPS) {
1058   // Allocate mirror (java.lang.Class instance)
1059   oop mirror_oop = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(k, CHECK);
1060   mirror = Handle(THREAD, mirror_oop);
1061 
1062   // Setup indirection from mirror->klass
1063   set_klass(mirror(), k);
1064 
1065   // Set the modifiers flag.
1066   u2 computed_modifiers = k->compute_modifier_flags();
1067   set_modifiers(mirror(), computed_modifiers);
1068 
1069   InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
1070   assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
1071 
1072   set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
1073 
1074   // It might also have a component mirror.  This mirror must already exist.
1075   if (k->is_array_klass()) {
1076     if (k->is_typeArray_klass()) {
1077       BasicType type = TypeArrayKlass::cast(k)->element_type();
1078       if (is_scratch) {
1079         comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(type));
1080       } else {
1081         comp_mirror = Handle(THREAD, Universe::java_mirror(type));
1082       }
1083     } else {
1084       assert(k->is_objArray_klass(), "Must be");
1085       Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1086       assert(element_klass != nullptr, "Must have an element klass");
1087       if (is_scratch) {
1088         comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass));
1089       } else {
1090         comp_mirror = Handle(THREAD, element_klass->java_mirror());
1091       }
1092     }
1093     assert(comp_mirror() != nullptr, "must have a mirror");
1094 
1095     // Two-way link between the array klass and its component mirror:
1096     // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
1097     set_component_mirror(mirror(), comp_mirror());
1098     // See below for ordering dependencies between field array_klass in component mirror
1099     // and java_mirror in this klass.
1100   } else {
1101     assert(k->is_instance_klass(), "Must be");
1102 
1103     initialize_mirror_fields(k, mirror, protection_domain, classData, THREAD);
1104     if (HAS_PENDING_EXCEPTION) {
1105       // If any of the fields throws an exception like OOM remove the klass field
1106       // from the mirror so GC doesn't follow it after the klass has been deallocated.
1107       // This mirror looks like a primitive type, which logically it is because it
1108       // it represents no class.
1109       set_klass(mirror(), nullptr);
1110       return;
1111     }
1112   }
1113 }
1114 
1115 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
1116                                     Handle module, Handle protection_domain,
1117                                     Handle classData, TRAPS) {
1118   assert(k != nullptr, "Use create_basic_type_mirror for primitive types");
1119   assert(k->java_mirror() == nullptr, "should only assign mirror once");
1120 
1121   // Class_klass has to be loaded because it is used to allocate
1122   // the mirror.
1123   if (vmClasses::Class_klass_loaded()) {
1124     Handle mirror;
1125     Handle comp_mirror;
1126 
1127     allocate_mirror(k, /*is_scratch=*/false, protection_domain, classData, mirror, comp_mirror, CHECK);
1128 
1129     // set the classLoader field in the java_lang_Class instance
1130     assert(class_loader() == k->class_loader(), "should be same");
1131     set_class_loader(mirror(), class_loader());
1132 
1133     // Setup indirection from klass->mirror
1134     // after any exceptions can happen during allocations.
1135     k->set_java_mirror(mirror);
1136 
1137     // Set the module field in the java_lang_Class instance.  This must be done
1138     // after the mirror is set.
1139     set_mirror_module_field(THREAD, k, mirror, module);
1140 
1141     if (comp_mirror() != nullptr) {
1142       // Set after k->java_mirror() is published, because compiled code running
1143       // concurrently doesn't expect a k to have a null java_mirror.
1144       release_set_array_klass(comp_mirror(), k);
1145     }
1146     if (CDSConfig::is_dumping_heap()) {
1147       create_scratch_mirror(k, CHECK);
1148     }
1149   } else {
1150     assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1151     fixup_mirror_list()->push(k);
1152   }
1153 }
1154 
1155 #if INCLUDE_CDS_JAVA_HEAP
1156 // The "scratch mirror" stores the states of the mirror object that can be
1157 // decided at dump time (such as the initial values of the static fields, the
1158 // component mirror, etc). At runtime, more information is added to it by
1159 // java_lang_Class::restore_archived_mirror().
1160 //
1161 // Essentially, /*dumptime*/create_scratch_mirror() + /*runtime*/restore_archived_mirror()
1162 // produces the same result as /*runtime*/create_mirror().
1163 //
1164 // Note: we archive the "scratch mirror" instead of k->java_mirror(), because the
1165 // latter may contain dumptime-specific information that cannot be archived
1166 // (e.g., ClassLoaderData*, or static fields that are modified by Java code execution).
1167 void java_lang_Class::create_scratch_mirror(Klass* k, TRAPS) {
1168   if (k->class_loader() != nullptr &&
1169       k->class_loader() != SystemDictionary::java_platform_loader() &&
1170       k->class_loader() != SystemDictionary::java_system_loader()) {
1171     // We only archive the mirrors of classes loaded by the built-in loaders
1172     return;
1173   }
1174 
1175   Handle protection_domain, classData; // set to null. Will be reinitialized at runtime
1176   Handle mirror;
1177   Handle comp_mirror;
1178   allocate_mirror(k, /*is_scratch=*/true, protection_domain, classData, mirror, comp_mirror, CHECK);
1179 
1180   if (comp_mirror() != nullptr) {
1181     release_set_array_klass(comp_mirror(), k);
1182   }
1183 
1184   HeapShared::set_scratch_java_mirror(k, mirror());
1185 }
1186 
1187 // Returns true if the mirror is updated, false if no archived mirror
1188 // data is present. After the archived mirror object is restored, the
1189 // shared klass' _has_raw_archived_mirror flag is cleared.
1190 bool java_lang_Class::restore_archived_mirror(Klass *k,
1191                                               Handle class_loader, Handle module,
1192                                               Handle protection_domain, TRAPS) {
1193   // Postpone restoring archived mirror until java.lang.Class is loaded. Please
1194   // see more details in vmClasses::resolve_all().
1195   if (!vmClasses::Class_klass_loaded()) {
1196     assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1197     fixup_mirror_list()->push(k);
1198     return true;
1199   }
1200 
1201   oop m = k->archived_java_mirror();
1202   assert(m != nullptr, "must have stored non-null archived mirror");
1203 
1204   // Sanity: clear it now to prevent re-initialization if any of the following fails
1205   k->clear_archived_mirror_index();
1206 
1207   // mirror is archived, restore
1208   log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1209   assert(as_Klass(m) == k, "must be");
1210   Handle mirror(THREAD, m);
1211 
1212   if (!k->is_array_klass()) {
1213     // - local static final fields with initial values were initialized at dump time
1214 
1215     // create the init_lock
1216     typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false));
1217     set_init_lock(mirror(), r);
1218 
1219     if (protection_domain.not_null()) {
1220       set_protection_domain(mirror(), protection_domain());
1221     }
1222   }
1223 
1224   assert(class_loader() == k->class_loader(), "should be same");
1225   if (class_loader.not_null()) {
1226     set_class_loader(mirror(), class_loader());
1227   }
1228 
1229   k->set_java_mirror(mirror);
1230 
1231   set_mirror_module_field(THREAD, k, mirror, module);
1232 
1233   if (log_is_enabled(Trace, cds, heap, mirror)) {
1234     ResourceMark rm(THREAD);
1235     log_trace(cds, heap, mirror)(
1236         "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1237   }
1238 
1239   return true;
1240 }
1241 #endif // INCLUDE_CDS_JAVA_HEAP
1242 
1243 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1244   assert(_module_offset != 0, "must have been computed already");
1245   set_module(k->java_mirror(), module());
1246 }
1247 
1248 void java_lang_Class::set_oop_size(HeapWord* java_class, size_t size) {
1249   assert(_oop_size_offset != 0, "must be set");
1250   assert(size > 0, "Oop size must be greater than zero, not %zu", size);
1251   assert(size <= INT_MAX, "Lossy conversion: %zu", size);
1252   *(int*)(((char*)java_class) + _oop_size_offset) = (int)size;
1253 }
1254 
1255 int  java_lang_Class::static_oop_field_count(oop java_class) {
1256   assert(_static_oop_field_count_offset != 0, "must be set");
1257   return java_class->int_field(_static_oop_field_count_offset);
1258 }
1259 
1260 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1261   assert(_static_oop_field_count_offset != 0, "must be set");
1262   java_class->int_field_put(_static_oop_field_count_offset, size);
1263 }
1264 
1265 oop java_lang_Class::protection_domain(oop java_class) {
1266   assert(_protection_domain_offset != 0, "must be set");
1267   return java_class->obj_field(_protection_domain_offset);
1268 }
1269 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1270   assert(_protection_domain_offset != 0, "must be set");
1271   java_class->obj_field_put(_protection_domain_offset, pd);
1272 }
1273 
1274 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1275   assert(_component_mirror_offset != 0, "must be set");
1276   assert(java_lang_Class::as_Klass(java_class) != nullptr &&
1277          java_lang_Class::as_Klass(java_class)->is_array_klass(), "must be");
1278   java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1279 }
1280 
1281 oop java_lang_Class::component_mirror(oop java_class) {
1282   assert(_component_mirror_offset != 0, "must be set");
1283   return java_class->obj_field(_component_mirror_offset);
1284 }
1285 
1286 oop java_lang_Class::init_lock(oop java_class) {
1287   assert(_init_lock_offset != 0, "must be set");
1288   return java_class->obj_field(_init_lock_offset);
1289 }
1290 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
1291   assert(_init_lock_offset != 0, "must be set");
1292   java_class->obj_field_put(_init_lock_offset, init_lock);
1293 }
1294 
1295 objArrayOop java_lang_Class::signers(oop java_class) {
1296   assert(_signers_offset != 0, "must be set");
1297   return (objArrayOop)java_class->obj_field(_signers_offset);
1298 }
1299 
1300 oop java_lang_Class::class_data(oop java_class) {
1301   assert(_classData_offset != 0, "must be set");
1302   return java_class->obj_field(_classData_offset);
1303 }
1304 void java_lang_Class::set_class_data(oop java_class, oop class_data) {
1305   assert(_classData_offset != 0, "must be set");
1306   java_class->obj_field_put(_classData_offset, class_data);
1307 }
1308 
1309 void java_lang_Class::set_reflection_data(oop java_class, oop reflection_data) {
1310   assert(_reflectionData_offset != 0, "must be set");
1311   java_class->obj_field_put(_reflectionData_offset, reflection_data);
1312 }
1313 
1314 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1315   assert(_class_loader_offset != 0, "offsets should have been initialized");
1316   java_class->obj_field_put(_class_loader_offset, loader);
1317 }
1318 
1319 oop java_lang_Class::class_loader(oop java_class) {
1320   assert(_class_loader_offset != 0, "must be set");
1321   return java_class->obj_field(_class_loader_offset);
1322 }
1323 
1324 oop java_lang_Class::module(oop java_class) {
1325   assert(_module_offset != 0, "must be set");
1326   return java_class->obj_field(_module_offset);
1327 }
1328 
1329 void java_lang_Class::set_module(oop java_class, oop module) {
1330   assert(_module_offset != 0, "must be set");
1331   java_class->obj_field_put(_module_offset, module);
1332 }
1333 
1334 oop java_lang_Class::name(Handle java_class, TRAPS) {
1335   assert(_name_offset != 0, "must be set");
1336   oop o = java_class->obj_field(_name_offset);
1337   if (o == nullptr) {
1338     o = StringTable::intern(as_external_name(java_class()), THREAD);
1339     java_class->obj_field_put(_name_offset, o);
1340   }
1341   return o;
1342 }
1343 
1344 oop java_lang_Class::source_file(oop java_class) {
1345   assert(_source_file_offset != 0, "must be set");
1346   return java_class->obj_field(_source_file_offset);
1347 }
1348 
1349 void java_lang_Class::set_source_file(oop java_class, oop source_file) {
1350   assert(_source_file_offset != 0, "must be set");
1351   java_class->obj_field_put(_source_file_offset, source_file);
1352 }
1353 
1354 void java_lang_Class::set_is_primitive(oop java_class) {
1355   assert(_is_primitive_offset != 0, "must be set");
1356   java_class->bool_field_put(_is_primitive_offset, true);
1357 }
1358 
1359 
1360 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1361   // Mirrors for basic types have a null klass field, which makes them special.
1362   oop java_class = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(nullptr, CHECK_NULL);
1363   if (type != T_VOID) {
1364     Klass* aklass = Universe::typeArrayKlass(type);
1365     assert(aklass != nullptr, "correct bootstrap");
1366     release_set_array_klass(java_class, aklass);
1367   }
1368 #ifdef ASSERT
1369   InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(vmClasses::Class_klass());
1370   assert(static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1371 #endif
1372   set_modifiers(java_class, JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC);
1373   set_is_primitive(java_class);
1374   return java_class;
1375 }
1376 
1377 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1378   assert(is_instance(java_class), "must be a Class object");
1379   java_class->metadata_field_put(_klass_offset, klass);
1380 }
1381 
1382 
1383 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1384   assert(is_instance(java_class), "must be a Class object");
1385   Symbol* name = nullptr;
1386   bool is_instance = false;
1387   if (is_primitive(java_class)) {
1388     name = vmSymbols::type_signature(primitive_type(java_class));
1389   } else {
1390     Klass* k = as_Klass(java_class);
1391     is_instance = k->is_instance_klass();
1392     name = k->name();
1393   }
1394   if (name == nullptr) {
1395     st->print("<null>");
1396     return;
1397   }
1398   if (is_instance)  st->print("L");
1399   st->write((char*) name->base(), (int) name->utf8_length());
1400   if (is_instance)  st->print(";");
1401 }
1402 
1403 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) {
1404   assert(is_instance(java_class), "must be a Class object");
1405   Symbol* name;
1406   if (is_primitive(java_class)) {
1407     name = vmSymbols::type_signature(primitive_type(java_class));
1408     // Because this can create a new symbol, the caller has to decrement
1409     // the refcount, so make adjustment here and below for symbols returned
1410     // that are not created or incremented due to a successful lookup.
1411     name->increment_refcount();
1412   } else {
1413     Klass* k = as_Klass(java_class);
1414     if (!k->is_instance_klass()) {
1415       name = k->name();
1416       name->increment_refcount();
1417     } else {
1418       ResourceMark rm;
1419       const char* sigstr = k->signature_name();
1420       int         siglen = (int) strlen(sigstr);
1421       if (!intern_if_not_found) {
1422         name = SymbolTable::probe(sigstr, siglen);
1423       } else {
1424         name = SymbolTable::new_symbol(sigstr, siglen);
1425       }
1426     }
1427   }
1428   return name;
1429 }
1430 
1431 // Returns the Java name for this Java mirror (Resource allocated)
1432 // See Klass::external_name().
1433 // For primitive type Java mirrors, its type name is returned.
1434 const char* java_lang_Class::as_external_name(oop java_class) {
1435   assert(is_instance(java_class), "must be a Class object");
1436   const char* name = nullptr;
1437   if (is_primitive(java_class)) {
1438     name = type2name(primitive_type(java_class));
1439   } else {
1440     name = as_Klass(java_class)->external_name();
1441   }
1442   if (name == nullptr) {
1443     name = "<null>";
1444   }
1445   return name;
1446 }
1447 
1448 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1449   Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1450   assert(k == nullptr || (k->is_klass() && k->is_array_klass()), "should be array klass");
1451   return k;
1452 }
1453 
1454 
1455 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1456   assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1457   java_class->release_metadata_field_put(_array_klass_offset, klass);
1458 }
1459 
1460 
1461 BasicType java_lang_Class::primitive_type(oop java_class) {
1462   assert(is_primitive(java_class), "just checking");
1463   Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1464   BasicType type = T_VOID;
1465   if (ak != nullptr) {
1466     // Note: create_basic_type_mirror above initializes ak to a non-null value.
1467     type = ArrayKlass::cast(ak)->element_type();
1468   } else {
1469     assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
1470   }
1471 #ifdef ASSERT
1472   if (CDSConfig::is_dumping_heap()) {
1473     oop mirror = Universe::java_mirror(type);
1474     oop scratch_mirror = HeapShared::scratch_java_mirror(type);
1475     assert(java_class == mirror || java_class == scratch_mirror, "must be consistent");
1476   } else {
1477     assert(Universe::java_mirror(type) == java_class, "must be consistent");
1478   }
1479 #endif
1480   return type;
1481 }
1482 
1483 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1484   assert(is_instance(java_class), "must be a Class object");
1485   if (is_primitive(java_class)) {
1486     if (reference_klass != nullptr)
1487       (*reference_klass) = nullptr;
1488     return primitive_type(java_class);
1489   } else {
1490     if (reference_klass != nullptr)
1491       (*reference_klass) = as_Klass(java_class);
1492     return T_OBJECT;
1493   }
1494 }
1495 
1496 
1497 oop java_lang_Class::primitive_mirror(BasicType t) {
1498   oop mirror = Universe::java_mirror(t);
1499   assert(mirror != nullptr && mirror->is_a(vmClasses::Class_klass()), "must be a Class");
1500   assert(is_primitive(mirror), "must be primitive");
1501   return mirror;
1502 }
1503 
1504 #define CLASS_FIELDS_DO(macro) \
1505   macro(_classRedefinedCount_offset, k, "classRedefinedCount", int_signature,          false); \
1506   macro(_class_loader_offset,        k, "classLoader",         classloader_signature,  false); \
1507   macro(_component_mirror_offset,    k, "componentType",       class_signature,        false); \
1508   macro(_module_offset,              k, "module",              module_signature,       false); \
1509   macro(_name_offset,                k, "name",                string_signature,       false); \
1510   macro(_classData_offset,           k, "classData",           object_signature,       false); \
1511   macro(_reflectionData_offset,      k, "reflectionData",      java_lang_ref_SoftReference_signature, false); \
1512   macro(_signers_offset,             k, "signers",             object_array_signature, false); \
1513   macro(_modifiers_offset,           k, vmSymbols::modifiers_name(), char_signature,    false); \
1514   macro(_protection_domain_offset,   k, "protectionDomain",    java_security_ProtectionDomain_signature,  false); \
1515   macro(_is_primitive_offset,        k, "primitive",           bool_signature,         false);
1516 
1517 void java_lang_Class::compute_offsets() {
1518   if (_offsets_computed) {
1519     return;
1520   }
1521 
1522   _offsets_computed = true;
1523 
1524   InstanceKlass* k = vmClasses::Class_klass();
1525   CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1526   CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1527 }
1528 
1529 #if INCLUDE_CDS
1530 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1531   f->do_bool(&_offsets_computed);
1532 
1533   CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1534 
1535   CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1536 }
1537 #endif
1538 
1539 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1540   assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1541   return the_class_mirror->int_field(_classRedefinedCount_offset);
1542 }
1543 
1544 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1545   assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1546   the_class_mirror->int_field_put(_classRedefinedCount_offset, value);
1547 }
1548 
1549 int java_lang_Class::modifiers(oop the_class_mirror) {
1550   assert(_modifiers_offset != 0, "offsets should have been initialized");
1551   return the_class_mirror->char_field(_modifiers_offset);
1552 }
1553 
1554 void java_lang_Class::set_modifiers(oop the_class_mirror, u2 value) {
1555   assert(_modifiers_offset != 0, "offsets should have been initialized");
1556   the_class_mirror->char_field_put(_modifiers_offset, value);
1557 }
1558 
1559 
1560 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1561 //       platform thread structure, and a eetop offset which was used for thread
1562 //       local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1563 //       merged, so in the HotSpot VM we just use the eetop field for the thread
1564 //       instead of the privateInfo_offset.
1565 //
1566 // Note: The stackSize field is only present starting in 1.4.
1567 
1568 int java_lang_Thread_FieldHolder::_group_offset;
1569 int java_lang_Thread_FieldHolder::_priority_offset;
1570 int java_lang_Thread_FieldHolder::_stackSize_offset;
1571 int java_lang_Thread_FieldHolder::_daemon_offset;
1572 int java_lang_Thread_FieldHolder::_thread_status_offset;
1573 
1574 #define THREAD_FIELD_HOLDER_FIELDS_DO(macro) \
1575   macro(_group_offset,         k, vmSymbols::group_name(),    threadgroup_signature, false); \
1576   macro(_priority_offset,      k, vmSymbols::priority_name(), int_signature,         false); \
1577   macro(_stackSize_offset,     k, "stackSize",                long_signature,        false); \
1578   macro(_daemon_offset,        k, vmSymbols::daemon_name(),   bool_signature,        false); \
1579   macro(_thread_status_offset, k, "threadStatus",             int_signature,         false)
1580 
1581 void java_lang_Thread_FieldHolder::compute_offsets() {
1582   assert(_group_offset == 0, "offsets should be initialized only once");
1583 
1584   InstanceKlass* k = vmClasses::Thread_FieldHolder_klass();
1585   THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1586 }
1587 
1588 #if INCLUDE_CDS
1589 void java_lang_Thread_FieldHolder::serialize_offsets(SerializeClosure* f) {
1590   THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1591 }
1592 #endif
1593 
1594 oop java_lang_Thread_FieldHolder::threadGroup(oop holder) {
1595   return holder->obj_field(_group_offset);
1596 }
1597 
1598 ThreadPriority java_lang_Thread_FieldHolder::priority(oop holder) {
1599   return (ThreadPriority)holder->int_field(_priority_offset);
1600 }
1601 
1602 void java_lang_Thread_FieldHolder::set_priority(oop holder, ThreadPriority priority) {
1603   holder->int_field_put(_priority_offset, priority);
1604 }
1605 
1606 jlong java_lang_Thread_FieldHolder::stackSize(oop holder) {
1607   return holder->long_field(_stackSize_offset);
1608 }
1609 
1610 bool java_lang_Thread_FieldHolder::is_daemon(oop holder) {
1611   return holder->bool_field(_daemon_offset) != 0;
1612 }
1613 
1614 void java_lang_Thread_FieldHolder::set_daemon(oop holder, bool val) {
1615   assert(val, "daemon status is never turned off");
1616   holder->bool_field_put(_daemon_offset, val);
1617 }
1618 
1619 void java_lang_Thread_FieldHolder::set_thread_status(oop holder, JavaThreadStatus status) {
1620   holder->int_field_put(_thread_status_offset, static_cast<int>(status));
1621 }
1622 
1623 JavaThreadStatus java_lang_Thread_FieldHolder::get_thread_status(oop holder) {
1624   return static_cast<JavaThreadStatus>(holder->int_field(_thread_status_offset));
1625 }
1626 
1627 
1628 int java_lang_Thread_Constants::_static_VTHREAD_GROUP_offset = 0;
1629 
1630 #define THREAD_CONSTANTS_STATIC_FIELDS_DO(macro) \
1631   macro(_static_VTHREAD_GROUP_offset,             k, "VTHREAD_GROUP",             threadgroup_signature, true);
1632 
1633 void java_lang_Thread_Constants::compute_offsets() {
1634   assert(_static_VTHREAD_GROUP_offset == 0, "offsets should be initialized only once");
1635 
1636   InstanceKlass* k = vmClasses::Thread_Constants_klass();
1637   THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1638 }
1639 
1640 #if INCLUDE_CDS
1641 void java_lang_Thread_Constants::serialize_offsets(SerializeClosure* f) {
1642   THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1643 }
1644 #endif
1645 
1646 oop java_lang_Thread_Constants::get_VTHREAD_GROUP() {
1647   InstanceKlass* k = vmClasses::Thread_Constants_klass();
1648   oop base = k->static_field_base_raw();
1649   return base->obj_field(_static_VTHREAD_GROUP_offset);
1650 }
1651 
1652 
1653 int java_lang_Thread::_holder_offset;
1654 int java_lang_Thread::_name_offset;
1655 int java_lang_Thread::_contextClassLoader_offset;
1656 int java_lang_Thread::_eetop_offset;
1657 int java_lang_Thread::_jvmti_thread_state_offset;
1658 int java_lang_Thread::_jvmti_VTMS_transition_disable_count_offset;
1659 int java_lang_Thread::_jvmti_is_in_VTMS_transition_offset;
1660 int java_lang_Thread::_interrupted_offset;
1661 int java_lang_Thread::_interruptLock_offset;
1662 int java_lang_Thread::_tid_offset;
1663 int java_lang_Thread::_continuation_offset;
1664 int java_lang_Thread::_park_blocker_offset;
1665 int java_lang_Thread::_scopedValueBindings_offset;
1666 JFR_ONLY(int java_lang_Thread::_jfr_epoch_offset;)
1667 
1668 #define THREAD_FIELDS_DO(macro) \
1669   macro(_holder_offset,        k, "holder", thread_fieldholder_signature, false); \
1670   macro(_name_offset,          k, vmSymbols::name_name(), string_signature, false); \
1671   macro(_contextClassLoader_offset, k, "contextClassLoader", classloader_signature, false); \
1672   macro(_eetop_offset,         k, "eetop", long_signature, false); \
1673   macro(_interrupted_offset,   k, "interrupted", bool_signature, false); \
1674   macro(_interruptLock_offset, k, "interruptLock", object_signature, false); \
1675   macro(_tid_offset,           k, "tid", long_signature, false); \
1676   macro(_park_blocker_offset,  k, "parkBlocker", object_signature, false); \
1677   macro(_continuation_offset,  k, "cont", continuation_signature, false); \
1678   macro(_scopedValueBindings_offset, k, "scopedValueBindings", object_signature, false);
1679 
1680 void java_lang_Thread::compute_offsets() {
1681   assert(_holder_offset == 0, "offsets should be initialized only once");
1682 
1683   InstanceKlass* k = vmClasses::Thread_klass();
1684   THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1685   THREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1686 }
1687 
1688 #if INCLUDE_CDS
1689 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1690   THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1691   THREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1692 }
1693 #endif
1694 
1695 JavaThread* java_lang_Thread::thread(oop java_thread) {
1696   return reinterpret_cast<JavaThread*>(java_thread->address_field(_eetop_offset));
1697 }
1698 
1699 JavaThread* java_lang_Thread::thread_acquire(oop java_thread) {
1700   return reinterpret_cast<JavaThread*>(java_thread->address_field_acquire(_eetop_offset));
1701 }
1702 
1703 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1704   java_thread->address_field_put(_eetop_offset, (address)thread);
1705 }
1706 
1707 void java_lang_Thread::release_set_thread(oop java_thread, JavaThread* thread) {
1708   java_thread->release_address_field_put(_eetop_offset, (address)thread);
1709 }
1710 
1711 JvmtiThreadState* java_lang_Thread::jvmti_thread_state(oop java_thread) {
1712   return (JvmtiThreadState*)java_thread->address_field(_jvmti_thread_state_offset);
1713 }
1714 
1715 void java_lang_Thread::set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state) {
1716   java_thread->address_field_put(_jvmti_thread_state_offset, (address)state);
1717 }
1718 
1719 int java_lang_Thread::VTMS_transition_disable_count(oop java_thread) {
1720   return java_thread->int_field(_jvmti_VTMS_transition_disable_count_offset);
1721 }
1722 
1723 void java_lang_Thread::inc_VTMS_transition_disable_count(oop java_thread) {
1724   assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1725   int val = VTMS_transition_disable_count(java_thread);
1726   java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val + 1);
1727 }
1728 
1729 void java_lang_Thread::dec_VTMS_transition_disable_count(oop java_thread) {
1730   assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1731   int val = VTMS_transition_disable_count(java_thread);
1732   assert(val > 0, "VTMS_transition_disable_count should never be negative");
1733   java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val - 1);
1734 }
1735 
1736 bool java_lang_Thread::is_in_VTMS_transition(oop java_thread) {
1737   return java_thread->bool_field_volatile(_jvmti_is_in_VTMS_transition_offset);
1738 }
1739 
1740 void java_lang_Thread::set_is_in_VTMS_transition(oop java_thread, bool val) {
1741   assert(is_in_VTMS_transition(java_thread) != val, "already %s transition", val ? "inside" : "outside");
1742   java_thread->bool_field_put_volatile(_jvmti_is_in_VTMS_transition_offset, val);
1743 }
1744 
1745 int java_lang_Thread::is_in_VTMS_transition_offset() {
1746   return _jvmti_is_in_VTMS_transition_offset;
1747 }
1748 
1749 void java_lang_Thread::clear_scopedValueBindings(oop java_thread) {
1750   assert(java_thread != nullptr, "need a java_lang_Thread pointer here");
1751   java_thread->obj_field_put(_scopedValueBindings_offset, nullptr);
1752 }
1753 
1754 oop java_lang_Thread::holder(oop java_thread) {
1755   // Note: may return null if the thread is still attaching
1756   return java_thread->obj_field(_holder_offset);
1757 }
1758 oop java_lang_Thread::interrupt_lock(oop java_thread) {
1759   return java_thread->obj_field(_interruptLock_offset);
1760 }
1761 
1762 bool java_lang_Thread::interrupted(oop java_thread) {
1763   // Make sure the caller can safely access oops.
1764   assert(Thread::current()->is_VM_thread() ||
1765          (JavaThread::current()->thread_state() != _thread_blocked &&
1766           JavaThread::current()->thread_state() != _thread_in_native),
1767          "Unsafe access to oop");
1768   return java_thread->bool_field_volatile(_interrupted_offset);
1769 }
1770 
1771 void java_lang_Thread::set_interrupted(oop java_thread, bool val) {
1772   // Make sure the caller can safely access oops.
1773   assert(Thread::current()->is_VM_thread() ||
1774          (JavaThread::current()->thread_state() != _thread_blocked &&
1775           JavaThread::current()->thread_state() != _thread_in_native),
1776          "Unsafe access to oop");
1777   java_thread->bool_field_put_volatile(_interrupted_offset, val);
1778 }
1779 
1780 
1781 oop java_lang_Thread::name(oop java_thread) {
1782   return java_thread->obj_field(_name_offset);
1783 }
1784 
1785 
1786 void java_lang_Thread::set_name(oop java_thread, oop name) {
1787   java_thread->obj_field_put(_name_offset, name);
1788 }
1789 
1790 // Convenience macros for setting and getting Thread fields that
1791 // are actually stored in the FieldHolder object of the thread.
1792 // The FieldHolder can be null whilst a thread is attaching via
1793 // JNI, and when the main thread is attaching.
1794 
1795 // The default value should be the default/zero initialized value
1796 // of the field as it would be in java.lang.Thread.FieldHolder.
1797 #define GET_FIELDHOLDER_FIELD(java_thread, field, default_val)  \
1798   {                                                             \
1799     oop holder = java_lang_Thread::holder(java_thread);         \
1800     if (holder != nullptr)                                      \
1801       return java_lang_Thread_FieldHolder::field(holder);       \
1802     else                                                        \
1803       return default_val;                                       \
1804   }
1805 
1806 // We should never be trying to set a field of an attaching thread.
1807 #define SET_FIELDHOLDER_FIELD(java_thread, field, value)        \
1808   {                                                             \
1809     oop holder = java_lang_Thread::holder(java_thread);         \
1810     assert(holder != nullptr, "Thread not fully initialized");  \
1811     java_lang_Thread_FieldHolder::set_##field(holder, value);   \
1812   }
1813 
1814 
1815 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1816   GET_FIELDHOLDER_FIELD(java_thread, priority, (ThreadPriority)0);
1817 }
1818 
1819 
1820 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1821   SET_FIELDHOLDER_FIELD(java_thread, priority, priority)
1822 }
1823 
1824 
1825 oop java_lang_Thread::threadGroup(oop java_thread) {
1826   GET_FIELDHOLDER_FIELD(java_thread, threadGroup, nullptr);
1827 }
1828 
1829 
1830 bool java_lang_Thread::is_alive(oop java_thread) {
1831   JavaThread* thr = java_lang_Thread::thread(java_thread);
1832   return (thr != nullptr);
1833 }
1834 
1835 
1836 bool java_lang_Thread::is_daemon(oop java_thread) {
1837   GET_FIELDHOLDER_FIELD(java_thread, is_daemon, false);
1838 }
1839 
1840 
1841 void java_lang_Thread::set_daemon(oop java_thread) {
1842   SET_FIELDHOLDER_FIELD(java_thread, daemon, true);
1843 }
1844 
1845 oop java_lang_Thread::context_class_loader(oop java_thread) {
1846   return java_thread->obj_field(_contextClassLoader_offset);
1847 }
1848 
1849 
1850 jlong java_lang_Thread::stackSize(oop java_thread) {
1851   GET_FIELDHOLDER_FIELD(java_thread, stackSize, 0);
1852 }
1853 
1854 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1855 void java_lang_Thread::set_thread_status(oop java_thread, JavaThreadStatus status) {
1856   SET_FIELDHOLDER_FIELD(java_thread, thread_status, status);
1857 }
1858 
1859 // Read thread status value from threadStatus field in java.lang.Thread java class.
1860 JavaThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1861   // Make sure the caller is operating on behalf of the VM or is
1862   // running VM code (state == _thread_in_vm).
1863   assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1864          JavaThread::current()->thread_state() == _thread_in_vm,
1865          "Java Thread is not running in vm");
1866   GET_FIELDHOLDER_FIELD(java_thread, get_thread_status, JavaThreadStatus::NEW /* not initialized */);
1867 }
1868 
1869 ByteSize java_lang_Thread::thread_id_offset() {
1870   return in_ByteSize(_tid_offset);
1871 }
1872 
1873 oop java_lang_Thread::park_blocker(oop java_thread) {
1874   return java_thread->obj_field(_park_blocker_offset);
1875 }
1876 
1877 oop java_lang_Thread::async_get_stack_trace(oop java_thread, TRAPS) {
1878   ThreadsListHandle tlh(JavaThread::current());
1879   JavaThread* thread;
1880   bool is_virtual = java_lang_VirtualThread::is_instance(java_thread);
1881   if (is_virtual) {
1882     oop carrier_thread = java_lang_VirtualThread::carrier_thread(java_thread);
1883     if (carrier_thread == nullptr) {
1884       return nullptr;
1885     }
1886     thread = java_lang_Thread::thread(carrier_thread);
1887   } else {
1888     thread = java_lang_Thread::thread(java_thread);
1889   }
1890   if (thread == nullptr) {
1891     return nullptr;
1892   }
1893 
1894   class GetStackTraceClosure : public HandshakeClosure {
1895   public:
1896     const Handle _java_thread;
1897     int _depth;
1898     bool _retry_handshake;
1899     GrowableArray<Method*>* _methods;
1900     GrowableArray<int>*     _bcis;
1901 
1902     GetStackTraceClosure(Handle java_thread) :
1903         HandshakeClosure("GetStackTraceClosure"), _java_thread(java_thread), _depth(0), _retry_handshake(false),
1904         _methods(nullptr), _bcis(nullptr) {
1905     }
1906     ~GetStackTraceClosure() {
1907       delete _methods;
1908       delete _bcis;
1909     }
1910 
1911     bool read_reset_retry() {
1912       bool ret = _retry_handshake;
1913       // If we re-execute the handshake this method need to return false
1914       // when the handshake cannot be performed. (E.g. thread terminating)
1915       _retry_handshake = false;
1916       return ret;
1917     }
1918 
1919     void do_thread(Thread* th) {
1920       if (!Thread::current()->is_Java_thread()) {
1921         _retry_handshake = true;
1922         return;
1923       }
1924 
1925       JavaThread* thread = JavaThread::cast(th);
1926 
1927       if (!thread->has_last_Java_frame()) {
1928         return;
1929       }
1930 
1931       bool carrier = false;
1932       if (java_lang_VirtualThread::is_instance(_java_thread())) {
1933         // if (thread->vthread() != _java_thread()) // We might be inside a System.executeOnCarrierThread
1934         const ContinuationEntry* ce = thread->vthread_continuation();
1935         if (ce == nullptr || ce->cont_oop(thread) != java_lang_VirtualThread::continuation(_java_thread())) {
1936           return; // not mounted
1937         }
1938       } else {
1939         carrier = (thread->vthread_continuation() != nullptr);
1940       }
1941 
1942       const int max_depth = MaxJavaStackTraceDepth;
1943       const bool skip_hidden = !ShowHiddenFrames;
1944 
1945       // Pick minimum length that will cover most cases
1946       int init_length = 64;
1947       _methods = new (mtInternal) GrowableArray<Method*>(init_length, mtInternal);
1948       _bcis = new (mtInternal) GrowableArray<int>(init_length, mtInternal);
1949 
1950       int total_count = 0;
1951       for (vframeStream vfst(thread, false, false, carrier); // we don't process frames as we don't care about oops
1952            !vfst.at_end() && (max_depth == 0 || max_depth != total_count);
1953            vfst.next()) {
1954 
1955         if (skip_hidden && (vfst.method()->is_hidden() ||
1956                             vfst.method()->is_continuation_enter_intrinsic())) {
1957           continue;
1958         }
1959 
1960         _methods->push(vfst.method());
1961         _bcis->push(vfst.bci());
1962         total_count++;
1963       }
1964 
1965       _depth = total_count;
1966     }
1967   };
1968 
1969   // Handshake with target
1970   ResourceMark rm(THREAD);
1971   HandleMark   hm(THREAD);
1972   GetStackTraceClosure gstc(Handle(THREAD, java_thread));
1973   do {
1974    Handshake::execute(&gstc, &tlh, thread);
1975   } while (gstc.read_reset_retry());
1976 
1977   // Stop if no stack trace is found.
1978   if (gstc._depth == 0) {
1979     return nullptr;
1980   }
1981 
1982   // Convert to StackTraceElement array
1983   InstanceKlass* k = vmClasses::StackTraceElement_klass();
1984   assert(k != nullptr, "must be loaded in 1.4+");
1985   if (k->should_be_initialized()) {
1986     k->initialize(CHECK_NULL);
1987   }
1988   objArrayHandle trace = oopFactory::new_objArray_handle(k, gstc._depth, CHECK_NULL);
1989 
1990   for (int i = 0; i < gstc._depth; i++) {
1991     methodHandle method(THREAD, gstc._methods->at(i));
1992     oop element = java_lang_StackTraceElement::create(method,
1993                                                       gstc._bcis->at(i),
1994                                                       CHECK_NULL);
1995     trace->obj_at_put(i, element);
1996   }
1997 
1998   return trace();
1999 }
2000 
2001 const char* java_lang_Thread::thread_status_name(oop java_thread) {
2002   JavaThreadStatus status = get_thread_status(java_thread);
2003   switch (status) {
2004     case JavaThreadStatus::NEW                      : return "NEW";
2005     case JavaThreadStatus::RUNNABLE                 : return "RUNNABLE";
2006     case JavaThreadStatus::SLEEPING                 : return "TIMED_WAITING (sleeping)";
2007     case JavaThreadStatus::IN_OBJECT_WAIT           : return "WAITING (on object monitor)";
2008     case JavaThreadStatus::IN_OBJECT_WAIT_TIMED     : return "TIMED_WAITING (on object monitor)";
2009     case JavaThreadStatus::PARKED                   : return "WAITING (parking)";
2010     case JavaThreadStatus::PARKED_TIMED             : return "TIMED_WAITING (parking)";
2011     case JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
2012     case JavaThreadStatus::TERMINATED               : return "TERMINATED";
2013     default                       : return "UNKNOWN";
2014   };
2015 }
2016 int java_lang_ThreadGroup::_parent_offset;
2017 int java_lang_ThreadGroup::_name_offset;
2018 int java_lang_ThreadGroup::_maxPriority_offset;
2019 int java_lang_ThreadGroup::_daemon_offset;
2020 
2021 oop  java_lang_ThreadGroup::parent(oop java_thread_group) {
2022   assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2023   return java_thread_group->obj_field(_parent_offset);
2024 }
2025 
2026 // ("name as oop" accessor is not necessary)
2027 
2028 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
2029   oop name = java_thread_group->obj_field(_name_offset);
2030   // ThreadGroup.name can be null
2031   if (name != nullptr) {
2032     return java_lang_String::as_utf8_string(name);
2033   }
2034   return nullptr;
2035 }
2036 
2037 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
2038   assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2039   return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
2040 }
2041 
2042 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
2043   assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2044   return java_thread_group->bool_field(_daemon_offset) != 0;
2045 }
2046 
2047 #define THREADGROUP_FIELDS_DO(macro) \
2048   macro(_parent_offset,      k, vmSymbols::parent_name(),      threadgroup_signature,         false); \
2049   macro(_name_offset,        k, vmSymbols::name_name(),        string_signature,              false); \
2050   macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature,                 false); \
2051   macro(_daemon_offset,      k, vmSymbols::daemon_name(),      bool_signature,                false);
2052 
2053 void java_lang_ThreadGroup::compute_offsets() {
2054   assert(_parent_offset == 0, "offsets should be initialized only once");
2055 
2056   InstanceKlass* k = vmClasses::ThreadGroup_klass();
2057   THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2058 }
2059 
2060 #if INCLUDE_CDS
2061 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
2062   THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2063 }
2064 #endif
2065 
2066 
2067 // java_lang_VirtualThread
2068 
2069 int java_lang_VirtualThread::static_vthread_scope_offset;
2070 int java_lang_VirtualThread::_carrierThread_offset;
2071 int java_lang_VirtualThread::_continuation_offset;
2072 int java_lang_VirtualThread::_state_offset;
2073 int java_lang_VirtualThread::_next_offset;
2074 int java_lang_VirtualThread::_onWaitingList_offset;
2075 int java_lang_VirtualThread::_notified_offset;
2076 int java_lang_VirtualThread::_timeout_offset;
2077 int java_lang_VirtualThread::_objectWaiter_offset;
2078 
2079 #define VTHREAD_FIELDS_DO(macro) \
2080   macro(static_vthread_scope_offset,       k, "VTHREAD_SCOPE",      continuationscope_signature, true);  \
2081   macro(_carrierThread_offset,             k, "carrierThread",      thread_signature,            false); \
2082   macro(_continuation_offset,              k, "cont",               continuation_signature,      false); \
2083   macro(_state_offset,                     k, "state",              int_signature,               false); \
2084   macro(_next_offset,                      k, "next",               vthread_signature,           false); \
2085   macro(_onWaitingList_offset,             k, "onWaitingList",      bool_signature,              false); \
2086   macro(_notified_offset,                  k, "notified",           bool_signature,              false); \
2087   macro(_timeout_offset,                   k, "timeout",            long_signature,              false);
2088 
2089 
2090 void java_lang_VirtualThread::compute_offsets() {
2091   InstanceKlass* k = vmClasses::VirtualThread_klass();
2092   VTHREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2093   VTHREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2094 }
2095 
2096 bool java_lang_VirtualThread::is_instance(oop obj) {
2097   return obj != nullptr && is_subclass(obj->klass());
2098 }
2099 
2100 oop java_lang_VirtualThread::carrier_thread(oop vthread) {
2101   oop thread = vthread->obj_field(_carrierThread_offset);
2102   return thread;
2103 }
2104 
2105 oop java_lang_VirtualThread::continuation(oop vthread) {
2106   oop cont = vthread->obj_field(_continuation_offset);
2107   return cont;
2108 }
2109 
2110 int java_lang_VirtualThread::state(oop vthread) {
2111   return vthread->int_field_acquire(_state_offset);
2112 }
2113 
2114 void java_lang_VirtualThread::set_state(oop vthread, int state) {
2115   vthread->release_int_field_put(_state_offset, state);
2116 }
2117 
2118 int java_lang_VirtualThread::cmpxchg_state(oop vthread, int old_state, int new_state) {
2119   jint* addr = vthread->field_addr<jint>(_state_offset);
2120   int res = Atomic::cmpxchg(addr, old_state, new_state);
2121   return res;
2122 }
2123 
2124 oop java_lang_VirtualThread::next(oop vthread) {
2125   return vthread->obj_field(_next_offset);
2126 }
2127 
2128 void java_lang_VirtualThread::set_next(oop vthread, oop next_vthread) {
2129   vthread->obj_field_put(_next_offset, next_vthread);
2130 }
2131 
2132 // Add vthread to the waiting list if it's not already in it. Multiple threads
2133 // could be trying to add vthread to the list at the same time, so we control
2134 // access with a cmpxchg on onWaitingList. The winner adds vthread to the list.
2135 // Method returns true if we added vthread to the list, false otherwise.
2136 bool java_lang_VirtualThread::set_onWaitingList(oop vthread, OopHandle& list_head) {
2137   jboolean* addr = vthread->field_addr<jboolean>(_onWaitingList_offset);
2138   jboolean vthread_on_list = Atomic::load(addr);
2139   if (!vthread_on_list) {
2140     vthread_on_list = Atomic::cmpxchg(addr, (jboolean)JNI_FALSE, (jboolean)JNI_TRUE);
2141     if (!vthread_on_list) {
2142       for (;;) {
2143         oop head = list_head.resolve();
2144         java_lang_VirtualThread::set_next(vthread, head);
2145         if (list_head.cmpxchg(head, vthread) == head) return true;
2146       }
2147     }
2148   }
2149   return false; // already on waiting list
2150 }
2151 
2152 void java_lang_VirtualThread::set_notified(oop vthread, jboolean value) {
2153   vthread->bool_field_put_volatile(_notified_offset, value);
2154 }
2155 
2156 jlong java_lang_VirtualThread::timeout(oop vthread) {
2157   return vthread->long_field(_timeout_offset);
2158 }
2159 
2160 void java_lang_VirtualThread::set_timeout(oop vthread, jlong value) {
2161   vthread->long_field_put(_timeout_offset, value);
2162 }
2163 
2164 JavaThreadStatus java_lang_VirtualThread::map_state_to_thread_status(int state) {
2165   JavaThreadStatus status = JavaThreadStatus::NEW;
2166   switch (state & ~SUSPENDED) {
2167     case NEW:
2168       status = JavaThreadStatus::NEW;
2169       break;
2170     case STARTED:
2171     case RUNNING:
2172     case PARKING:
2173     case TIMED_PARKING:
2174     case UNPARKED:
2175     case YIELDING:
2176     case YIELDED:
2177     case UNBLOCKED:
2178     case WAITING:
2179     case TIMED_WAITING:
2180       status = JavaThreadStatus::RUNNABLE;
2181       break;
2182     case PARKED:
2183     case PINNED:
2184       status = JavaThreadStatus::PARKED;
2185       break;
2186     case TIMED_PARKED:
2187     case TIMED_PINNED:
2188       status = JavaThreadStatus::PARKED_TIMED;
2189       break;
2190     case BLOCKING:
2191     case BLOCKED:
2192       status = JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER;
2193       break;
2194     case WAIT:
2195       status = JavaThreadStatus::IN_OBJECT_WAIT;
2196       break;
2197     case TIMED_WAIT:
2198       status = JavaThreadStatus::IN_OBJECT_WAIT_TIMED;
2199       break;
2200     case TERMINATED:
2201       status = JavaThreadStatus::TERMINATED;
2202       break;
2203     default:
2204       ShouldNotReachHere();
2205   }
2206   return status;
2207 }
2208 
2209 ObjectMonitor* java_lang_VirtualThread::current_pending_monitor(oop vthread) {
2210   ObjectWaiter* waiter = objectWaiter(vthread);
2211   if (waiter != nullptr && waiter->at_monitorenter()) {
2212     return waiter->monitor();
2213   }
2214   return nullptr;
2215 }
2216 
2217 ObjectMonitor* java_lang_VirtualThread::current_waiting_monitor(oop vthread) {
2218   ObjectWaiter* waiter = objectWaiter(vthread);
2219   if (waiter != nullptr && waiter->is_wait()) {
2220     return waiter->monitor();
2221   }
2222   return nullptr;
2223 }
2224 
2225 bool java_lang_VirtualThread::is_preempted(oop vthread) {
2226   oop continuation = java_lang_VirtualThread::continuation(vthread);
2227   assert(continuation != nullptr, "vthread with no continuation");
2228   stackChunkOop chunk = jdk_internal_vm_Continuation::tail(continuation);
2229   return chunk != nullptr && chunk->preempted();
2230 }
2231 
2232 #if INCLUDE_CDS
2233 void java_lang_VirtualThread::serialize_offsets(SerializeClosure* f) {
2234    VTHREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2235    VTHREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
2236 }
2237 #endif
2238 
2239 // java_lang_Throwable
2240 
2241 int java_lang_Throwable::_backtrace_offset;
2242 int java_lang_Throwable::_detailMessage_offset;
2243 int java_lang_Throwable::_stackTrace_offset;
2244 int java_lang_Throwable::_depth_offset;
2245 int java_lang_Throwable::_cause_offset;
2246 int java_lang_Throwable::_static_unassigned_stacktrace_offset;
2247 
2248 #define THROWABLE_FIELDS_DO(macro) \
2249   macro(_backtrace_offset,     k, "backtrace",     object_signature,                  false); \
2250   macro(_detailMessage_offset, k, "detailMessage", string_signature,                  false); \
2251   macro(_stackTrace_offset,    k, "stackTrace",    java_lang_StackTraceElement_array, false); \
2252   macro(_depth_offset,         k, "depth",         int_signature,                     false); \
2253   macro(_cause_offset,         k, "cause",         throwable_signature,               false); \
2254   macro(_static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
2255 
2256 void java_lang_Throwable::compute_offsets() {
2257   InstanceKlass* k = vmClasses::Throwable_klass();
2258   THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2259 }
2260 
2261 #if INCLUDE_CDS
2262 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
2263   THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2264 }
2265 #endif
2266 
2267 oop java_lang_Throwable::unassigned_stacktrace() {
2268   InstanceKlass* ik = vmClasses::Throwable_klass();
2269   oop base = ik->static_field_base_raw();
2270   return base->obj_field(_static_unassigned_stacktrace_offset);
2271 }
2272 
2273 oop java_lang_Throwable::backtrace(oop throwable) {
2274   return throwable->obj_field_acquire(_backtrace_offset);
2275 }
2276 
2277 
2278 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
2279   throwable->release_obj_field_put(_backtrace_offset, value);
2280 }
2281 
2282 int java_lang_Throwable::depth(oop throwable) {
2283   return throwable->int_field(_depth_offset);
2284 }
2285 
2286 void java_lang_Throwable::set_depth(oop throwable, int value) {
2287   throwable->int_field_put(_depth_offset, value);
2288 }
2289 
2290 oop java_lang_Throwable::message(oop throwable) {
2291   return throwable->obj_field(_detailMessage_offset);
2292 }
2293 
2294 const char* java_lang_Throwable::message_as_utf8(oop throwable) {
2295   oop msg = java_lang_Throwable::message(throwable);
2296   const char* msg_utf8 = nullptr;
2297   if (msg != nullptr) {
2298     msg_utf8 = java_lang_String::as_utf8_string(msg);
2299   }
2300   return msg_utf8;
2301 }
2302 
2303 oop java_lang_Throwable::cause(oop throwable) {
2304   return throwable->obj_field(_cause_offset);
2305 }
2306 
2307 void java_lang_Throwable::set_message(oop throwable, oop value) {
2308   throwable->obj_field_put(_detailMessage_offset, value);
2309 }
2310 
2311 
2312 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
2313   throwable->obj_field_put(_stackTrace_offset, st_element_array);
2314 }
2315 
2316 void java_lang_Throwable::clear_stacktrace(oop throwable) {
2317   set_stacktrace(throwable, nullptr);
2318 }
2319 
2320 
2321 void java_lang_Throwable::print(oop throwable, outputStream* st) {
2322   ResourceMark rm;
2323   Klass* k = throwable->klass();
2324   assert(k != nullptr, "just checking");
2325   st->print("%s", k->external_name());
2326   oop msg = message(throwable);
2327   if (msg != nullptr) {
2328     st->print(": %s", java_lang_String::as_utf8_string(msg));
2329   }
2330 }
2331 
2332 // After this many redefines, the stack trace is unreliable.
2333 const int MAX_VERSION = USHRT_MAX;
2334 
2335 static inline bool version_matches(Method* method, int version) {
2336   assert(version < MAX_VERSION, "version is too big");
2337   return method != nullptr && (method->constants()->version() == version);
2338 }
2339 
2340 // This class provides a simple wrapper over the internal structure of
2341 // exception backtrace to insulate users of the backtrace from needing
2342 // to know what it looks like.
2343 // The code of this class is not GC safe. Allocations can only happen
2344 // in expand().
2345 class BacktraceBuilder: public StackObj {
2346  friend class BacktraceIterator;
2347  private:
2348   Handle          _backtrace;
2349   objArrayOop     _head;
2350   typeArrayOop    _methods;
2351   typeArrayOop    _bcis;
2352   objArrayOop     _mirrors;
2353   typeArrayOop    _names; // Needed to insulate method name against redefinition.
2354   // True if the top frame of the backtrace is omitted because it shall be hidden.
2355   bool            _has_hidden_top_frame;
2356   int             _index;
2357   NoSafepointVerifier _nsv;
2358 
2359   enum {
2360     trace_methods_offset = java_lang_Throwable::trace_methods_offset,
2361     trace_bcis_offset    = java_lang_Throwable::trace_bcis_offset,
2362     trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
2363     trace_names_offset   = java_lang_Throwable::trace_names_offset,
2364     trace_conts_offset   = java_lang_Throwable::trace_conts_offset,
2365     trace_next_offset    = java_lang_Throwable::trace_next_offset,
2366     trace_hidden_offset  = java_lang_Throwable::trace_hidden_offset,
2367     trace_size           = java_lang_Throwable::trace_size,
2368     trace_chunk_size     = java_lang_Throwable::trace_chunk_size
2369   };
2370 
2371   // get info out of chunks
2372   static typeArrayOop get_methods(objArrayHandle chunk) {
2373     typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
2374     assert(methods != nullptr, "method array should be initialized in backtrace");
2375     return methods;
2376   }
2377   static typeArrayOop get_bcis(objArrayHandle chunk) {
2378     typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
2379     assert(bcis != nullptr, "bci array should be initialized in backtrace");
2380     return bcis;
2381   }
2382   static objArrayOop get_mirrors(objArrayHandle chunk) {
2383     objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
2384     assert(mirrors != nullptr, "mirror array should be initialized in backtrace");
2385     return mirrors;
2386   }
2387   static typeArrayOop get_names(objArrayHandle chunk) {
2388     typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2389     assert(names != nullptr, "names array should be initialized in backtrace");
2390     return names;
2391   }
2392   static bool has_hidden_top_frame(objArrayHandle chunk) {
2393     oop hidden = chunk->obj_at(trace_hidden_offset);
2394     return hidden != nullptr;
2395   }
2396 
2397  public:
2398 
2399   // constructor for new backtrace
2400   BacktraceBuilder(TRAPS): _head(nullptr), _methods(nullptr), _bcis(nullptr), _mirrors(nullptr), _names(nullptr), _has_hidden_top_frame(false) {
2401     expand(CHECK);
2402     _backtrace = Handle(THREAD, _head);
2403     _index = 0;
2404   }
2405 
2406   BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2407     _methods = get_methods(backtrace);
2408     _bcis = get_bcis(backtrace);
2409     _mirrors = get_mirrors(backtrace);
2410     _names = get_names(backtrace);
2411     _has_hidden_top_frame = has_hidden_top_frame(backtrace);
2412     assert(_methods->length() == _bcis->length() &&
2413            _methods->length() == _mirrors->length() &&
2414            _mirrors->length() == _names->length(),
2415            "method and source information arrays should match");
2416 
2417     // head is the preallocated backtrace
2418     _head = backtrace();
2419     _backtrace = Handle(thread, _head);
2420     _index = 0;
2421   }
2422 
2423   void expand(TRAPS) {
2424     objArrayHandle old_head(THREAD, _head);
2425     PauseNoSafepointVerifier pnsv(&_nsv);
2426 
2427     objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2428     objArrayHandle new_head(THREAD, head);
2429 
2430     typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2431     typeArrayHandle new_methods(THREAD, methods);
2432 
2433     typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2434     typeArrayHandle new_bcis(THREAD, bcis);
2435 
2436     objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2437     objArrayHandle new_mirrors(THREAD, mirrors);
2438 
2439     typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2440     typeArrayHandle new_names(THREAD, names);
2441 
2442     if (!old_head.is_null()) {
2443       old_head->obj_at_put(trace_next_offset, new_head());
2444     }
2445     new_head->obj_at_put(trace_methods_offset, new_methods());
2446     new_head->obj_at_put(trace_bcis_offset, new_bcis());
2447     new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2448     new_head->obj_at_put(trace_names_offset, new_names());
2449     new_head->obj_at_put(trace_hidden_offset, nullptr);
2450 
2451     _head    = new_head();
2452     _methods = new_methods();
2453     _bcis = new_bcis();
2454     _mirrors = new_mirrors();
2455     _names  = new_names();
2456     _index = 0;
2457   }
2458 
2459   oop backtrace() {
2460     return _backtrace();
2461   }
2462 
2463   inline void push(Method* method, int bci, TRAPS) {
2464     // Smear the -1 bci to 0 since the array only holds unsigned
2465     // shorts.  The later line number lookup would just smear the -1
2466     // to a 0 even if it could be recorded.
2467     if (bci == SynchronizationEntryBCI) bci = 0;
2468 
2469     if (_index >= trace_chunk_size) {
2470       methodHandle mhandle(THREAD, method);
2471       expand(CHECK);
2472       method = mhandle();
2473     }
2474 
2475     _methods->ushort_at_put(_index, method->orig_method_idnum());
2476     _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2477 
2478     // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2479     // klass owning the symbols alive so their refcounts aren't decremented.
2480     Symbol* name = method->name();
2481     _names->symbol_at_put(_index, name);
2482 
2483     // We need to save the mirrors in the backtrace to keep the class
2484     // from being unloaded while we still have this stack trace.
2485     assert(method->method_holder()->java_mirror() != nullptr, "never push null for mirror");
2486     _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2487 
2488     _index++;
2489   }
2490 
2491   void set_has_hidden_top_frame() {
2492     if (!_has_hidden_top_frame) {
2493       // It would be nice to add java/lang/Boolean::TRUE here
2494       // to indicate that this backtrace has a hidden top frame.
2495       // But this code is used before TRUE is allocated.
2496       // Therefore let's just use an arbitrary legal oop
2497       // available right here. _methods is a short[].
2498       assert(_methods != nullptr, "we need a legal oop");
2499       _has_hidden_top_frame = true;
2500       _head->obj_at_put(trace_hidden_offset, _methods);
2501     }
2502   }
2503 };
2504 
2505 struct BacktraceElement : public StackObj {
2506   int _method_id;
2507   int _bci;
2508   int _version;
2509   Symbol* _name;
2510   Handle _mirror;
2511   BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2512                    _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2513 };
2514 
2515 class BacktraceIterator : public StackObj {
2516   int _index;
2517   objArrayHandle  _result;
2518   objArrayHandle  _mirrors;
2519   typeArrayHandle _methods;
2520   typeArrayHandle _bcis;
2521   typeArrayHandle _names;
2522 
2523   void init(objArrayHandle result, Thread* thread) {
2524     // Get method id, bci, version and mirror from chunk
2525     _result = result;
2526     if (_result.not_null()) {
2527       _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2528       _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2529       _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2530       _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2531       _index = 0;
2532     }
2533   }
2534  public:
2535   BacktraceIterator(objArrayHandle result, Thread* thread) {
2536     init(result, thread);
2537     assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2538   }
2539 
2540   BacktraceElement next(Thread* thread) {
2541     BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2542                         _methods->ushort_at(_index),
2543                         Backtrace::version_at(_bcis->int_at(_index)),
2544                         Backtrace::bci_at(_bcis->int_at(_index)),
2545                         _names->symbol_at(_index));
2546     _index++;
2547 
2548     if (_index >= java_lang_Throwable::trace_chunk_size) {
2549       int next_offset = java_lang_Throwable::trace_next_offset;
2550       // Get next chunk
2551       objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2552       init(result, thread);
2553     }
2554     return e;
2555   }
2556 
2557   bool repeat() {
2558     return _result.not_null() && _mirrors->obj_at(_index) != nullptr;
2559   }
2560 };
2561 
2562 
2563 // Print stack trace element to resource allocated buffer
2564 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2565                                           int version, int bci, Symbol* name) {
2566   ResourceMark rm;
2567 
2568   // Get strings and string lengths
2569   InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2570   const char* klass_name  = holder->external_name();
2571   int buf_len = (int)strlen(klass_name);
2572 
2573   char* method_name = name->as_C_string();
2574   buf_len += (int)strlen(method_name);
2575 
2576   char* source_file_name = nullptr;
2577   Symbol* source = Backtrace::get_source_file_name(holder, version);
2578   if (source != nullptr) {
2579     source_file_name = source->as_C_string();
2580     buf_len += (int)strlen(source_file_name);
2581   }
2582 
2583   char *module_name = nullptr, *module_version = nullptr;
2584   ModuleEntry* module = holder->module();
2585   if (module->is_named()) {
2586     module_name = module->name()->as_C_string();
2587     buf_len += (int)strlen(module_name);
2588     if (module->version() != nullptr) {
2589       module_version = module->version()->as_C_string();
2590       buf_len += (int)strlen(module_version);
2591     }
2592   }
2593 
2594   // Allocate temporary buffer with extra space for formatting and line number
2595   const size_t buf_size = buf_len + 64;
2596   char* buf = NEW_RESOURCE_ARRAY(char, buf_size);
2597 
2598   // Print stack trace line in buffer
2599   size_t buf_off = os::snprintf_checked(buf, buf_size, "\tat %s.%s(", klass_name, method_name);
2600 
2601   // Print module information
2602   if (module_name != nullptr) {
2603     if (module_version != nullptr) {
2604       buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s@%s/", module_name, module_version);
2605     } else {
2606       buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s/", module_name);
2607     }
2608   }
2609 
2610   // The method can be null if the requested class version is gone
2611   Method* method = holder->method_with_orig_idnum(method_id, version);
2612   if (!version_matches(method, version)) {
2613     strcat(buf, "Redefined)");
2614   } else {
2615     int line_number = Backtrace::get_line_number(method, bci);
2616     if (line_number == -2) {
2617       strcat(buf, "Native Method)");
2618     } else {
2619       if (source_file_name != nullptr && (line_number != -1)) {
2620         // Sourcename and linenumber
2621         buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s:%d)", source_file_name, line_number);
2622       } else if (source_file_name != nullptr) {
2623         // Just sourcename
2624         buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s)", source_file_name);
2625       } else {
2626         // Neither sourcename nor linenumber
2627         buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "Unknown Source)");
2628       }
2629       nmethod* nm = method->code();
2630       if (WizardMode && nm != nullptr) {
2631         os::snprintf_checked(buf + buf_off, buf_size - buf_off, "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
2632       }
2633     }
2634   }
2635 
2636   st->print_cr("%s", buf);
2637 }
2638 
2639 void java_lang_Throwable::print_stack_element(outputStream *st, Method* method, int bci) {
2640   Handle mirror (Thread::current(),  method->method_holder()->java_mirror());
2641   int method_id = method->orig_method_idnum();
2642   int version = method->constants()->version();
2643   print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2644 }
2645 
2646 /**
2647  * Print the throwable message and its stack trace plus all causes by walking the
2648  * cause chain.  The output looks the same as of Throwable.printStackTrace().
2649  */
2650 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2651   // First, print the message.
2652   print(throwable(), st);
2653   st->cr();
2654 
2655   // Now print the stack trace.
2656   JavaThread* THREAD = JavaThread::current(); // For exception macros.
2657   while (throwable.not_null()) {
2658     objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2659     if (result.is_null()) {
2660       st->print_raw_cr("\t<<no stack trace available>>");
2661       return;
2662     }
2663     BacktraceIterator iter(result, THREAD);
2664 
2665     while (iter.repeat()) {
2666       BacktraceElement bte = iter.next(THREAD);
2667       print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2668     }
2669     if (THREAD->can_call_java()) {
2670       // Call getCause() which doesn't necessarily return the _cause field.
2671       ExceptionMark em(THREAD);
2672       JavaValue cause(T_OBJECT);
2673       JavaCalls::call_virtual(&cause,
2674                               throwable,
2675                               throwable->klass(),
2676                               vmSymbols::getCause_name(),
2677                               vmSymbols::void_throwable_signature(),
2678                               THREAD);
2679       // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2680       if (HAS_PENDING_EXCEPTION) {
2681         CLEAR_PENDING_EXCEPTION;
2682         throwable = Handle();
2683       } else {
2684         throwable = Handle(THREAD, cause.get_oop());
2685         if (throwable.not_null()) {
2686           st->print("Caused by: ");
2687           print(throwable(), st);
2688           st->cr();
2689         }
2690       }
2691     } else {
2692       st->print_raw_cr("<<cannot call Java to get cause>>");
2693       return;
2694     }
2695   }
2696 }
2697 
2698 /**
2699  * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2700  */
2701 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2702   assert(throwable->is_a(vmClasses::Throwable_klass()), "Throwable instance expected");
2703   JavaValue result(T_VOID);
2704   JavaCalls::call_virtual(&result,
2705                           throwable,
2706                           vmClasses::Throwable_klass(),
2707                           vmSymbols::printStackTrace_name(),
2708                           vmSymbols::void_method_signature(),
2709                           THREAD);
2710 }
2711 
2712 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2713   if (!StackTraceInThrowable) return;
2714   ResourceMark rm(THREAD);
2715 
2716   // Start out by clearing the backtrace for this object, in case the VM
2717   // runs out of memory while allocating the stack trace
2718   set_backtrace(throwable(), nullptr);
2719   // Clear lazily constructed Java level stacktrace if refilling occurs
2720   // This is unnecessary in 1.7+ but harmless
2721   clear_stacktrace(throwable());
2722 
2723   int max_depth = MaxJavaStackTraceDepth;
2724   JavaThread* thread = THREAD;
2725 
2726   BacktraceBuilder bt(CHECK);
2727 
2728   // If there is no Java frame just return the method that was being called
2729   // with bci 0
2730   if (!thread->has_last_Java_frame()) {
2731     if (max_depth >= 1 && method() != nullptr) {
2732       bt.push(method(), 0, CHECK);
2733       log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2734       set_depth(throwable(), 1);
2735       set_backtrace(throwable(), bt.backtrace());
2736     }
2737     return;
2738   }
2739 
2740   // Instead of using vframe directly, this version of fill_in_stack_trace
2741   // basically handles everything by hand. This significantly improved the
2742   // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2743   // See bug 6333838 for  more details.
2744   // The "ASSERT" here is to verify this method generates the exactly same stack
2745   // trace as utilizing vframe.
2746 #ifdef ASSERT
2747   vframeStream st(thread, false /* stop_at_java_call_stub */, false /* process_frames */);
2748 #endif
2749   int total_count = 0;
2750   RegisterMap map(thread,
2751                   RegisterMap::UpdateMap::skip,
2752                   RegisterMap::ProcessFrames::skip,
2753                   RegisterMap::WalkContinuation::include);
2754   int decode_offset = 0;
2755   nmethod* nm = nullptr;
2756   bool skip_fillInStackTrace_check = false;
2757   bool skip_throwableInit_check = false;
2758   bool skip_hidden = !ShowHiddenFrames;
2759   bool show_carrier = ShowCarrierFrames;
2760   ContinuationEntry* cont_entry = thread->last_continuation();
2761   for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2762     Method* method = nullptr;
2763     int bci = 0;
2764 
2765     // Compiled java method case.
2766     if (decode_offset != 0) {
2767       DebugInfoReadStream stream(nm, decode_offset);
2768       decode_offset = stream.read_int();
2769       method = (Method*)nm->metadata_at(stream.read_int());
2770       bci = stream.read_bci();
2771     } else {
2772       if (fr.is_first_frame()) break;
2773 
2774       if (Continuation::is_continuation_enterSpecial(fr)) {
2775         assert(cont_entry == Continuation::get_continuation_entry_for_entry_frame(thread, fr), "");
2776         if (!show_carrier && cont_entry->is_virtual_thread()) {
2777           break;
2778         }
2779         cont_entry = cont_entry->parent();
2780       }
2781 
2782       address pc = fr.pc();
2783       if (fr.is_interpreted_frame()) {
2784         address bcp;
2785         if (!map.in_cont()) {
2786           bcp = fr.interpreter_frame_bcp();
2787           method = fr.interpreter_frame_method();
2788         } else {
2789           bcp = map.stack_chunk()->interpreter_frame_bcp(fr);
2790           method = map.stack_chunk()->interpreter_frame_method(fr);
2791         }
2792         bci =  method->bci_from(bcp);
2793         fr = fr.sender(&map);
2794       } else {
2795         CodeBlob* cb = fr.cb();
2796         // HMMM QQQ might be nice to have frame return nm as null if cb is non-null
2797         // but non nmethod
2798         fr = fr.sender(&map);
2799         if (cb == nullptr || !cb->is_nmethod()) {
2800           continue;
2801         }
2802         nm = cb->as_nmethod();
2803         assert(nm->method() != nullptr, "must be");
2804         if (nm->method()->is_native()) {
2805           method = nm->method();
2806           bci = 0;
2807         } else {
2808           PcDesc* pd = nm->pc_desc_at(pc);
2809           decode_offset = pd->scope_decode_offset();
2810           // if decode_offset is not equal to 0, it will execute the
2811           // "compiled java method case" at the beginning of the loop.
2812           continue;
2813         }
2814       }
2815     }
2816 #ifdef ASSERT
2817     if (!st.at_end()) { // TODO LOOM remove once we show only vthread trace
2818       assert(st.method() == method && st.bci() == bci, "Wrong stack trace");
2819       st.next();
2820     }
2821 #endif
2822 
2823     // the format of the stacktrace will be:
2824     // - 1 or more fillInStackTrace frames for the exception class (skipped)
2825     // - 0 or more <init> methods for the exception class (skipped)
2826     // - rest of the stack
2827 
2828     if (!skip_fillInStackTrace_check) {
2829       if (method->name() == vmSymbols::fillInStackTrace_name() &&
2830           throwable->is_a(method->method_holder())) {
2831         continue;
2832       }
2833       else {
2834         skip_fillInStackTrace_check = true; // gone past them all
2835       }
2836     }
2837     if (!skip_throwableInit_check) {
2838       assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2839 
2840       // skip <init> methods of the exception class and superclasses
2841       // This is similar to classic VM.
2842       if (method->name() == vmSymbols::object_initializer_name() &&
2843           throwable->is_a(method->method_holder())) {
2844         continue;
2845       } else {
2846         // there are none or we've seen them all - either way stop checking
2847         skip_throwableInit_check = true;
2848       }
2849     }
2850     if (method->is_hidden() || method->is_continuation_enter_intrinsic()) {
2851       if (skip_hidden) {
2852         if (total_count == 0) {
2853           // The top frame will be hidden from the stack trace.
2854           bt.set_has_hidden_top_frame();
2855         }
2856         continue;
2857       }
2858     }
2859 
2860     bt.push(method, bci, CHECK);
2861     total_count++;
2862   }
2863 
2864   log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2865 
2866   // Put completed stack trace into throwable object
2867   set_backtrace(throwable(), bt.backtrace());
2868   set_depth(throwable(), total_count);
2869 }
2870 
2871 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2872   // No-op if stack trace is disabled
2873   if (!StackTraceInThrowable) {
2874     return;
2875   }
2876 
2877   // Disable stack traces for some preallocated out of memory errors
2878   if (!Universe::should_fill_in_stack_trace(throwable)) {
2879     return;
2880   }
2881 
2882   JavaThread* THREAD = JavaThread::current(); // For exception macros.
2883   PreserveExceptionMark pm(THREAD);
2884 
2885   fill_in_stack_trace(throwable, method, THREAD);
2886   // Ignore exceptions thrown during stack trace filling (OOM) and reinstall the
2887   // original exception via the PreserveExceptionMark destructor.
2888   CLEAR_PENDING_EXCEPTION;
2889 }
2890 
2891 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2892   // Allocate stack trace - backtrace is created but not filled in
2893 
2894   // No-op if stack trace is disabled
2895   if (!StackTraceInThrowable) return;
2896   BacktraceBuilder bt(CHECK);   // creates a backtrace
2897   set_backtrace(throwable(), bt.backtrace());
2898 }
2899 
2900 
2901 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2902   // Fill in stack trace into preallocated backtrace (no GC)
2903 
2904   // No-op if stack trace is disabled
2905   if (!StackTraceInThrowable) return;
2906 
2907   assert(throwable->is_a(vmClasses::Throwable_klass()), "sanity check");
2908 
2909   JavaThread* THREAD = JavaThread::current(); // For exception macros.
2910 
2911   objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2912   assert(backtrace.not_null(), "backtrace should have been preallocated");
2913 
2914   ResourceMark rm(THREAD);
2915   vframeStream st(THREAD, false /* stop_at_java_call_stub */, false /* process_frames */);
2916 
2917   BacktraceBuilder bt(THREAD, backtrace);
2918 
2919   // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2920   // methods as preallocated errors aren't created by "java" code.
2921 
2922   // fill in as much stack trace as possible
2923   int chunk_count = 0;
2924   for (;!st.at_end(); st.next()) {
2925     bt.push(st.method(), st.bci(), CHECK);
2926     chunk_count++;
2927 
2928     // Bail-out for deep stacks
2929     if (chunk_count >= trace_chunk_size) break;
2930   }
2931   set_depth(throwable(), chunk_count);
2932   log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2933 
2934   // We support the Throwable immutability protocol defined for Java 7.
2935   java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2936   assert(java_lang_Throwable::unassigned_stacktrace() != nullptr, "not initialized");
2937 }
2938 
2939 void java_lang_Throwable::get_stack_trace_elements(int depth, Handle backtrace,
2940                                                    objArrayHandle stack_trace_array_h, TRAPS) {
2941 
2942   if (backtrace.is_null() || stack_trace_array_h.is_null()) {
2943     THROW(vmSymbols::java_lang_NullPointerException());
2944   }
2945 
2946   assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2947 
2948   if (stack_trace_array_h->length() != depth) {
2949     THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2950   }
2951 
2952   objArrayHandle result(THREAD, objArrayOop(backtrace()));
2953   BacktraceIterator iter(result, THREAD);
2954 
2955   int index = 0;
2956   while (iter.repeat()) {
2957     BacktraceElement bte = iter.next(THREAD);
2958 
2959     Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2960 
2961     if (stack_trace_element.is_null()) {
2962       THROW(vmSymbols::java_lang_NullPointerException());
2963     }
2964 
2965     InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2966     methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2967 
2968     java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2969                                          method,
2970                                          bte._version,
2971                                          bte._bci,
2972                                          bte._name,
2973                                          CHECK);
2974   }
2975 }
2976 
2977 Handle java_lang_Throwable::create_initialization_error(JavaThread* current, Handle throwable) {
2978   // Creates an ExceptionInInitializerError to be recorded as the initialization error when class initialization
2979   // failed due to the passed in 'throwable'. We cannot save 'throwable' directly due to issues with keeping alive
2980   // all objects referenced via its stacktrace. So instead we save a new EIIE instance, with the same message and
2981   // symbolic stacktrace of 'throwable'.
2982   assert(throwable.not_null(), "shouldn't be");
2983 
2984   // Now create the message from the original exception and thread name.
2985   ResourceMark rm(current);
2986   const char *message = nullptr;
2987   oop detailed_message = java_lang_Throwable::message(throwable());
2988   if (detailed_message != nullptr) {
2989     message = java_lang_String::as_utf8_string(detailed_message);
2990   }
2991   stringStream st;
2992   st.print("Exception %s%s ", throwable()->klass()->name()->as_klass_external_name(),
2993              message == nullptr ? "" : ":");
2994   if (message == nullptr) {
2995     st.print("[in thread \"%s\"]", current->name());
2996   } else {
2997     st.print("%s [in thread \"%s\"]", message, current->name());
2998   }
2999 
3000   Symbol* exception_name = vmSymbols::java_lang_ExceptionInInitializerError();
3001   Handle init_error = Exceptions::new_exception(current, exception_name, st.as_string());
3002   // If new_exception returns a different exception while creating the exception,
3003   // abandon the attempt to save the initialization error and return null.
3004   if (init_error->klass()->name() != exception_name) {
3005     log_info(class, init)("Exception %s thrown while saving initialization exception",
3006                         init_error->klass()->external_name());
3007     return Handle();
3008   }
3009 
3010   // Call to java to fill in the stack trace and clear declaringClassObject to
3011   // not keep classes alive in the stack trace.
3012   // call this:  public StackTraceElement[] getStackTrace()
3013   JavaValue result(T_ARRAY);
3014   JavaCalls::call_virtual(&result, throwable,
3015                           vmClasses::Throwable_klass(),
3016                           vmSymbols::getStackTrace_name(),
3017                           vmSymbols::getStackTrace_signature(),
3018                           current);
3019   if (!current->has_pending_exception()){
3020     Handle stack_trace(current, result.get_oop());
3021     assert(stack_trace->is_objArray(), "Should be an array");
3022     java_lang_Throwable::set_stacktrace(init_error(), stack_trace());
3023     // Clear backtrace because the stacktrace should be used instead.
3024     set_backtrace(init_error(), nullptr);
3025   } else {
3026     log_info(class, init)("Exception thrown while getting stack trace for initialization exception %s",
3027                         init_error->klass()->external_name());
3028     current->clear_pending_exception();
3029   }
3030 
3031   return init_error;
3032 }
3033 
3034 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) {
3035   JavaThread* current = JavaThread::current();
3036   objArrayHandle result(current, objArrayOop(backtrace(throwable)));
3037   BacktraceIterator iter(result, current);
3038   // No backtrace available.
3039   if (!iter.repeat()) return false;
3040 
3041   // If the exception happened in a frame that has been hidden, i.e.,
3042   // omitted from the back trace, we can not compute the message.
3043   oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset);
3044   if (hidden != nullptr) {
3045     return false;
3046   }
3047 
3048   // Get first backtrace element.
3049   BacktraceElement bte = iter.next(current);
3050 
3051   InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
3052   assert(holder != nullptr, "first element should be non-null");
3053   Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version);
3054 
3055   // Original version is no longer available.
3056   if (m == nullptr || !version_matches(m, bte._version)) {
3057     return false;
3058   }
3059 
3060   *method = m;
3061   *bci = bte._bci;
3062   return true;
3063 }
3064 
3065 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
3066   // Allocate java.lang.StackTraceElement instance
3067   InstanceKlass* k = vmClasses::StackTraceElement_klass();
3068   assert(k != nullptr, "must be loaded in 1.4+");
3069   if (k->should_be_initialized()) {
3070     k->initialize(CHECK_NULL);
3071   }
3072 
3073   Handle element = k->allocate_instance_handle(CHECK_NULL);
3074 
3075   int version = method->constants()->version();
3076   fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_NULL);
3077   return element();
3078 }
3079 
3080 void java_lang_StackTraceElement::fill_in(Handle element,
3081                                           InstanceKlass* holder, const methodHandle& method,
3082                                           int version, int bci, Symbol* name, TRAPS) {
3083   assert(element->is_a(vmClasses::StackTraceElement_klass()), "sanity check");
3084 
3085   ResourceMark rm(THREAD);
3086   HandleMark hm(THREAD);
3087 
3088   // Fill in class name
3089   Handle java_class(THREAD, holder->java_mirror());
3090   oop classname = java_lang_Class::name(java_class, CHECK);
3091   java_lang_StackTraceElement::set_declaringClass(element(), classname);
3092   java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
3093 
3094   oop loader = holder->class_loader();
3095   if (loader != nullptr) {
3096     oop loader_name = java_lang_ClassLoader::name(loader);
3097     if (loader_name != nullptr)
3098       java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
3099   }
3100 
3101   // Fill in method name
3102   oop methodname = StringTable::intern(name, CHECK);
3103   java_lang_StackTraceElement::set_methodName(element(), methodname);
3104 
3105   // Fill in module name and version
3106   ModuleEntry* module = holder->module();
3107   if (module->is_named()) {
3108     oop module_name = StringTable::intern(module->name(), CHECK);
3109     java_lang_StackTraceElement::set_moduleName(element(), module_name);
3110     oop module_version;
3111     if (module->version() != nullptr) {
3112       module_version = StringTable::intern(module->version(), CHECK);
3113     } else {
3114       module_version = nullptr;
3115     }
3116     java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
3117   }
3118 
3119   if (method() == nullptr || !version_matches(method(), version)) {
3120     // The method was redefined, accurate line number information isn't available
3121     java_lang_StackTraceElement::set_fileName(element(), nullptr);
3122     java_lang_StackTraceElement::set_lineNumber(element(), -1);
3123   } else {
3124     Symbol* source;
3125     oop source_file;
3126     int line_number;
3127     decode_file_and_line(java_class, holder, version, method, bci, source, source_file, line_number, CHECK);
3128 
3129     java_lang_StackTraceElement::set_fileName(element(), source_file);
3130     java_lang_StackTraceElement::set_lineNumber(element(), line_number);
3131   }
3132 }
3133 
3134 void java_lang_StackTraceElement::decode_file_and_line(Handle java_class,
3135                                                        InstanceKlass* holder,
3136                                                        int version,
3137                                                        const methodHandle& method,
3138                                                        int bci,
3139                                                        Symbol*& source,
3140                                                        oop& source_file,
3141                                                        int& line_number, TRAPS) {
3142   // Fill in source file name and line number.
3143   source = Backtrace::get_source_file_name(holder, version);
3144   source_file = java_lang_Class::source_file(java_class());
3145   if (source != nullptr) {
3146     // Class was not redefined. We can trust its cache if set,
3147     // else we have to initialize it.
3148     if (source_file == nullptr) {
3149       source_file = StringTable::intern(source, CHECK);
3150       java_lang_Class::set_source_file(java_class(), source_file);
3151     }
3152   } else {
3153     // Class was redefined. Dump the cache if it was set.
3154     if (source_file != nullptr) {
3155       source_file = nullptr;
3156       java_lang_Class::set_source_file(java_class(), source_file);
3157     }
3158   }
3159   line_number = Backtrace::get_line_number(method(), bci);
3160 }
3161 
3162 #if INCLUDE_JVMCI
3163 void java_lang_StackTraceElement::decode(const methodHandle& method, int bci,
3164                                          Symbol*& filename, int& line_number, TRAPS) {
3165   ResourceMark rm(THREAD);
3166   HandleMark hm(THREAD);
3167 
3168   filename = nullptr;
3169   line_number = -1;
3170 
3171   oop source_file;
3172   int version = method->constants()->version();
3173   InstanceKlass* holder = method->method_holder();
3174   Handle java_class(THREAD, holder->java_mirror());
3175   decode_file_and_line(java_class, holder, version, method, bci, filename, source_file, line_number, CHECK);
3176 }
3177 #endif // INCLUDE_JVMCI
3178 
3179 // java_lang_ClassFrameInfo
3180 
3181 int java_lang_ClassFrameInfo::_classOrMemberName_offset;
3182 int java_lang_ClassFrameInfo::_flags_offset;
3183 
3184 #define CLASSFRAMEINFO_FIELDS_DO(macro) \
3185   macro(_classOrMemberName_offset, k, "classOrMemberName", object_signature,  false); \
3186   macro(_flags_offset,             k, vmSymbols::flags_name(), int_signature, false)
3187 
3188 void java_lang_ClassFrameInfo::compute_offsets() {
3189   InstanceKlass* k = vmClasses::ClassFrameInfo_klass();
3190   CLASSFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3191 }
3192 
3193 #if INCLUDE_CDS
3194 void java_lang_ClassFrameInfo::serialize_offsets(SerializeClosure* f) {
3195   CLASSFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3196 }
3197 #endif
3198 
3199 static int get_flags(const methodHandle& m) {
3200   int flags = m->access_flags().as_method_flags();
3201   if (m->is_object_initializer()) {
3202     flags |= java_lang_invoke_MemberName::MN_IS_CONSTRUCTOR;
3203   } else {
3204     // Note: Static initializers can be here. Record them as plain methods.
3205     flags |= java_lang_invoke_MemberName::MN_IS_METHOD;
3206   }
3207   if (m->caller_sensitive()) {
3208     flags |= java_lang_invoke_MemberName::MN_CALLER_SENSITIVE;
3209   }
3210   if (m->is_hidden()) {
3211     flags |= java_lang_invoke_MemberName::MN_HIDDEN_MEMBER;
3212   }
3213   assert((flags & 0xFF000000) == 0, "unexpected flags");
3214   return flags;
3215 }
3216 
3217 oop java_lang_ClassFrameInfo::classOrMemberName(oop obj) {
3218   return obj->obj_field(_classOrMemberName_offset);
3219 }
3220 
3221 int java_lang_ClassFrameInfo::flags(oop obj) {
3222   return obj->int_field(_flags_offset);
3223 }
3224 
3225 void java_lang_ClassFrameInfo::init_class(Handle stackFrame, const methodHandle& m) {
3226   stackFrame->obj_field_put(_classOrMemberName_offset, m->method_holder()->java_mirror());
3227   // flags is initialized when ClassFrameInfo object is constructed and retain the value
3228   int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3229   stackFrame->int_field_put(_flags_offset, flags);
3230 }
3231 
3232 void java_lang_ClassFrameInfo::init_method(Handle stackFrame, const methodHandle& m, TRAPS) {
3233   oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(m, CHECK);
3234   stackFrame->obj_field_put(_classOrMemberName_offset, rmethod_name);
3235   // flags is initialized when ClassFrameInfo object is constructed and retain the value
3236   int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3237   stackFrame->int_field_put(_flags_offset, flags);
3238 }
3239 
3240 
3241 // java_lang_StackFrameInfo
3242 
3243 int java_lang_StackFrameInfo::_type_offset;
3244 int java_lang_StackFrameInfo::_name_offset;
3245 int java_lang_StackFrameInfo::_bci_offset;
3246 int java_lang_StackFrameInfo::_version_offset;
3247 int java_lang_StackFrameInfo::_contScope_offset;
3248 
3249 #define STACKFRAMEINFO_FIELDS_DO(macro) \
3250   macro(_type_offset,       k, "type",       object_signature,            false); \
3251   macro(_name_offset,       k, "name",       string_signature,            false); \
3252   macro(_bci_offset,        k, "bci",        int_signature,               false); \
3253   macro(_contScope_offset,  k, "contScope",  continuationscope_signature, false)
3254 
3255 void java_lang_StackFrameInfo::compute_offsets() {
3256   InstanceKlass* k = vmClasses::StackFrameInfo_klass();
3257   STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3258   STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3259 }
3260 
3261 #if INCLUDE_CDS
3262 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
3263   STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3264   STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3265 }
3266 #endif
3267 
3268 Method* java_lang_StackFrameInfo::get_method(oop obj) {
3269   oop m = java_lang_ClassFrameInfo::classOrMemberName(obj);
3270   Method* method = java_lang_invoke_ResolvedMethodName::vmtarget(m);
3271   return method;
3272 }
3273 
3274 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS) {
3275   // set Method* or mid/cpref
3276   HandleMark hm(THREAD);
3277   Handle cont_h(THREAD, cont);
3278   java_lang_ClassFrameInfo::init_method(stackFrame, method, CHECK);
3279 
3280   // set bci
3281   java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
3282   // method may be redefined; store the version
3283   int version = method->constants()->version();
3284   assert((jushort)version == version, "version should be short");
3285   java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
3286 
3287   oop contScope = cont_h() != nullptr ? jdk_internal_vm_Continuation::scope(cont_h()) : (oop)nullptr;
3288   java_lang_StackFrameInfo::set_contScope(stackFrame(), contScope);
3289 }
3290 
3291 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
3292   ResourceMark rm(THREAD);
3293   HandleMark hm(THREAD);
3294 
3295   Method* method = java_lang_StackFrameInfo::get_method(stackFrame());
3296   InstanceKlass* holder = method->method_holder();
3297   short version = stackFrame->short_field(_version_offset);
3298   int bci = stackFrame->int_field(_bci_offset);
3299   Symbol* name = method->name();
3300   java_lang_StackTraceElement::fill_in(stack_trace_element, holder, methodHandle(THREAD, method), version, bci, name, CHECK);
3301 }
3302 
3303 oop java_lang_StackFrameInfo::type(oop obj) {
3304   return obj->obj_field(_type_offset);
3305 }
3306 
3307 void java_lang_StackFrameInfo::set_type(oop obj, oop value) {
3308   obj->obj_field_put(_type_offset, value);
3309 }
3310 
3311 oop java_lang_StackFrameInfo::name(oop obj) {
3312   return obj->obj_field(_name_offset);
3313 }
3314 
3315 void java_lang_StackFrameInfo::set_name(oop obj, oop value) {
3316   obj->obj_field_put(_name_offset, value);
3317 }
3318 
3319 void java_lang_StackFrameInfo::set_version(oop obj, short value) {
3320   obj->short_field_put(_version_offset, value);
3321 }
3322 
3323 void java_lang_StackFrameInfo::set_bci(oop obj, int value) {
3324   assert(value >= 0 && value < max_jushort, "must be a valid bci value");
3325   obj->int_field_put(_bci_offset, value);
3326 }
3327 
3328 void java_lang_StackFrameInfo::set_contScope(oop obj, oop value) {
3329   obj->obj_field_put(_contScope_offset, value);
3330 }
3331 
3332 int java_lang_LiveStackFrameInfo::_monitors_offset;
3333 int java_lang_LiveStackFrameInfo::_locals_offset;
3334 int java_lang_LiveStackFrameInfo::_operands_offset;
3335 int java_lang_LiveStackFrameInfo::_mode_offset;
3336 
3337 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
3338   macro(_monitors_offset,   k, "monitors",    object_array_signature, false); \
3339   macro(_locals_offset,     k, "locals",      object_array_signature, false); \
3340   macro(_operands_offset,   k, "operands",    object_array_signature, false); \
3341   macro(_mode_offset,       k, "mode",        int_signature,          false)
3342 
3343 void java_lang_LiveStackFrameInfo::compute_offsets() {
3344   InstanceKlass* k = vmClasses::LiveStackFrameInfo_klass();
3345   LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3346 }
3347 
3348 #if INCLUDE_CDS
3349 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
3350   LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3351 }
3352 #endif
3353 
3354 void java_lang_LiveStackFrameInfo::set_monitors(oop obj, oop value) {
3355   obj->obj_field_put(_monitors_offset, value);
3356 }
3357 
3358 void java_lang_LiveStackFrameInfo::set_locals(oop obj, oop value) {
3359   obj->obj_field_put(_locals_offset, value);
3360 }
3361 
3362 void java_lang_LiveStackFrameInfo::set_operands(oop obj, oop value) {
3363   obj->obj_field_put(_operands_offset, value);
3364 }
3365 
3366 void java_lang_LiveStackFrameInfo::set_mode(oop obj, int value) {
3367   obj->int_field_put(_mode_offset, value);
3368 }
3369 
3370 
3371 // java_lang_AccessibleObject
3372 
3373 int java_lang_reflect_AccessibleObject::_override_offset;
3374 
3375 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
3376   macro(_override_offset, k, "override", bool_signature, false)
3377 
3378 void java_lang_reflect_AccessibleObject::compute_offsets() {
3379   InstanceKlass* k = vmClasses::reflect_AccessibleObject_klass();
3380   ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3381 }
3382 
3383 #if INCLUDE_CDS
3384 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
3385   ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3386 }
3387 #endif
3388 
3389 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
3390   return (jboolean) reflect->bool_field(_override_offset);
3391 }
3392 
3393 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
3394   reflect->bool_field_put(_override_offset, (int) value);
3395 }
3396 
3397 // java_lang_reflect_Method
3398 
3399 int java_lang_reflect_Method::_clazz_offset;
3400 int java_lang_reflect_Method::_name_offset;
3401 int java_lang_reflect_Method::_returnType_offset;
3402 int java_lang_reflect_Method::_parameterTypes_offset;
3403 int java_lang_reflect_Method::_exceptionTypes_offset;
3404 int java_lang_reflect_Method::_slot_offset;
3405 int java_lang_reflect_Method::_modifiers_offset;
3406 int java_lang_reflect_Method::_signature_offset;
3407 int java_lang_reflect_Method::_annotations_offset;
3408 int java_lang_reflect_Method::_parameter_annotations_offset;
3409 int java_lang_reflect_Method::_annotation_default_offset;
3410 
3411 #define METHOD_FIELDS_DO(macro) \
3412   macro(_clazz_offset,          k, vmSymbols::clazz_name(),          class_signature,       false); \
3413   macro(_name_offset,           k, vmSymbols::name_name(),           string_signature,      false); \
3414   macro(_returnType_offset,     k, vmSymbols::returnType_name(),     class_signature,       false); \
3415   macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3416   macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3417   macro(_slot_offset,           k, vmSymbols::slot_name(),           int_signature,         false); \
3418   macro(_modifiers_offset,      k, vmSymbols::modifiers_name(),      int_signature,         false); \
3419   macro(_signature_offset,             k, vmSymbols::signature_name(),             string_signature,     false); \
3420   macro(_annotations_offset,           k, vmSymbols::annotations_name(),           byte_array_signature, false); \
3421   macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
3422   macro(_annotation_default_offset,    k, vmSymbols::annotation_default_name(),    byte_array_signature, false);
3423 
3424 void java_lang_reflect_Method::compute_offsets() {
3425   InstanceKlass* k = vmClasses::reflect_Method_klass();
3426   METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3427 }
3428 
3429 #if INCLUDE_CDS
3430 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
3431   METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3432 }
3433 #endif
3434 
3435 Handle java_lang_reflect_Method::create(TRAPS) {
3436   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3437   Klass* klass = vmClasses::reflect_Method_klass();
3438   // This class is eagerly initialized during VM initialization, since we keep a reference
3439   // to one of the methods
3440   assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
3441   return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
3442 }
3443 
3444 oop java_lang_reflect_Method::clazz(oop reflect) {
3445   return reflect->obj_field(_clazz_offset);
3446 }
3447 
3448 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
3449    reflect->obj_field_put(_clazz_offset, value);
3450 }
3451 
3452 int java_lang_reflect_Method::slot(oop reflect) {
3453   return reflect->int_field(_slot_offset);
3454 }
3455 
3456 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
3457   reflect->int_field_put(_slot_offset, value);
3458 }
3459 
3460 void java_lang_reflect_Method::set_name(oop method, oop value) {
3461   method->obj_field_put(_name_offset, value);
3462 }
3463 
3464 oop java_lang_reflect_Method::return_type(oop method) {
3465   return method->obj_field(_returnType_offset);
3466 }
3467 
3468 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
3469   method->obj_field_put(_returnType_offset, value);
3470 }
3471 
3472 oop java_lang_reflect_Method::parameter_types(oop method) {
3473   return method->obj_field(_parameterTypes_offset);
3474 }
3475 
3476 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
3477   method->obj_field_put(_parameterTypes_offset, value);
3478 }
3479 
3480 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
3481   method->obj_field_put(_exceptionTypes_offset, value);
3482 }
3483 
3484 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
3485   method->int_field_put(_modifiers_offset, value);
3486 }
3487 
3488 void java_lang_reflect_Method::set_signature(oop method, oop value) {
3489   method->obj_field_put(_signature_offset, value);
3490 }
3491 
3492 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
3493   method->obj_field_put(_annotations_offset, value);
3494 }
3495 
3496 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
3497   method->obj_field_put(_parameter_annotations_offset, value);
3498 }
3499 
3500 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
3501   method->obj_field_put(_annotation_default_offset, value);
3502 }
3503 
3504 int java_lang_reflect_Constructor::_clazz_offset;
3505 int java_lang_reflect_Constructor::_parameterTypes_offset;
3506 int java_lang_reflect_Constructor::_exceptionTypes_offset;
3507 int java_lang_reflect_Constructor::_slot_offset;
3508 int java_lang_reflect_Constructor::_modifiers_offset;
3509 int java_lang_reflect_Constructor::_signature_offset;
3510 int java_lang_reflect_Constructor::_annotations_offset;
3511 int java_lang_reflect_Constructor::_parameter_annotations_offset;
3512 
3513 #define CONSTRUCTOR_FIELDS_DO(macro) \
3514   macro(_clazz_offset,          k, vmSymbols::clazz_name(),          class_signature,       false); \
3515   macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3516   macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3517   macro(_slot_offset,           k, vmSymbols::slot_name(),           int_signature,         false); \
3518   macro(_modifiers_offset,      k, vmSymbols::modifiers_name(),      int_signature,         false); \
3519   macro(_signature_offset,             k, vmSymbols::signature_name(),             string_signature,     false); \
3520   macro(_annotations_offset,           k, vmSymbols::annotations_name(),           byte_array_signature, false); \
3521   macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
3522 
3523 void java_lang_reflect_Constructor::compute_offsets() {
3524   InstanceKlass* k = vmClasses::reflect_Constructor_klass();
3525   CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3526 }
3527 
3528 #if INCLUDE_CDS
3529 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
3530   CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3531 }
3532 #endif
3533 
3534 Handle java_lang_reflect_Constructor::create(TRAPS) {
3535   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3536   Symbol* name = vmSymbols::java_lang_reflect_Constructor();
3537   Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3538   InstanceKlass* ik = InstanceKlass::cast(k);
3539   // Ensure it is initialized
3540   ik->initialize(CHECK_NH);
3541   return ik->allocate_instance_handle(THREAD);
3542 }
3543 
3544 oop java_lang_reflect_Constructor::clazz(oop reflect) {
3545   return reflect->obj_field(_clazz_offset);
3546 }
3547 
3548 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
3549    reflect->obj_field_put(_clazz_offset, value);
3550 }
3551 
3552 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
3553   return constructor->obj_field(_parameterTypes_offset);
3554 }
3555 
3556 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
3557   constructor->obj_field_put(_parameterTypes_offset, value);
3558 }
3559 
3560 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
3561   constructor->obj_field_put(_exceptionTypes_offset, value);
3562 }
3563 
3564 int java_lang_reflect_Constructor::slot(oop reflect) {
3565   return reflect->int_field(_slot_offset);
3566 }
3567 
3568 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
3569   reflect->int_field_put(_slot_offset, value);
3570 }
3571 
3572 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
3573   constructor->int_field_put(_modifiers_offset, value);
3574 }
3575 
3576 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
3577   constructor->obj_field_put(_signature_offset, value);
3578 }
3579 
3580 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
3581   constructor->obj_field_put(_annotations_offset, value);
3582 }
3583 
3584 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
3585   method->obj_field_put(_parameter_annotations_offset, value);
3586 }
3587 
3588 int java_lang_reflect_Field::_clazz_offset;
3589 int java_lang_reflect_Field::_name_offset;
3590 int java_lang_reflect_Field::_type_offset;
3591 int java_lang_reflect_Field::_slot_offset;
3592 int java_lang_reflect_Field::_modifiers_offset;
3593 int java_lang_reflect_Field::_trusted_final_offset;
3594 int java_lang_reflect_Field::_signature_offset;
3595 int java_lang_reflect_Field::_annotations_offset;
3596 
3597 #define FIELD_FIELDS_DO(macro) \
3598   macro(_clazz_offset,     k, vmSymbols::clazz_name(),     class_signature,  false); \
3599   macro(_name_offset,      k, vmSymbols::name_name(),      string_signature, false); \
3600   macro(_type_offset,      k, vmSymbols::type_name(),      class_signature,  false); \
3601   macro(_slot_offset,      k, vmSymbols::slot_name(),      int_signature,    false); \
3602   macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature,    false); \
3603   macro(_trusted_final_offset,    k, vmSymbols::trusted_final_name(),    bool_signature,       false); \
3604   macro(_signature_offset,        k, vmSymbols::signature_name(),        string_signature,     false); \
3605   macro(_annotations_offset,      k, vmSymbols::annotations_name(),      byte_array_signature, false);
3606 
3607 void java_lang_reflect_Field::compute_offsets() {
3608   InstanceKlass* k = vmClasses::reflect_Field_klass();
3609   FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3610 }
3611 
3612 #if INCLUDE_CDS
3613 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
3614   FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3615 }
3616 #endif
3617 
3618 Handle java_lang_reflect_Field::create(TRAPS) {
3619   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3620   Symbol* name = vmSymbols::java_lang_reflect_Field();
3621   Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3622   InstanceKlass* ik = InstanceKlass::cast(k);
3623   // Ensure it is initialized
3624   ik->initialize(CHECK_NH);
3625   return ik->allocate_instance_handle(THREAD);
3626 }
3627 
3628 oop java_lang_reflect_Field::clazz(oop reflect) {
3629   return reflect->obj_field(_clazz_offset);
3630 }
3631 
3632 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
3633   reflect->obj_field_put(_clazz_offset, value);
3634 }
3635 
3636 oop java_lang_reflect_Field::name(oop field) {
3637   return field->obj_field(_name_offset);
3638 }
3639 
3640 void java_lang_reflect_Field::set_name(oop field, oop value) {
3641   field->obj_field_put(_name_offset, value);
3642 }
3643 
3644 oop java_lang_reflect_Field::type(oop field) {
3645   return field->obj_field(_type_offset);
3646 }
3647 
3648 void java_lang_reflect_Field::set_type(oop field, oop value) {
3649   field->obj_field_put(_type_offset, value);
3650 }
3651 
3652 int java_lang_reflect_Field::slot(oop reflect) {
3653   return reflect->int_field(_slot_offset);
3654 }
3655 
3656 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
3657   reflect->int_field_put(_slot_offset, value);
3658 }
3659 
3660 int java_lang_reflect_Field::modifiers(oop field) {
3661   return field->int_field(_modifiers_offset);
3662 }
3663 
3664 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
3665   field->int_field_put(_modifiers_offset, value);
3666 }
3667 
3668 void java_lang_reflect_Field::set_trusted_final(oop field) {
3669   field->bool_field_put(_trusted_final_offset, true);
3670 }
3671 
3672 void java_lang_reflect_Field::set_signature(oop field, oop value) {
3673   field->obj_field_put(_signature_offset, value);
3674 }
3675 
3676 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
3677   field->obj_field_put(_annotations_offset, value);
3678 }
3679 
3680 oop java_lang_reflect_RecordComponent::create(InstanceKlass* holder, RecordComponent* component, TRAPS) {
3681   // Allocate java.lang.reflect.RecordComponent instance
3682   HandleMark hm(THREAD);
3683   InstanceKlass* ik = vmClasses::RecordComponent_klass();
3684   assert(ik != nullptr, "must be loaded");
3685   ik->initialize(CHECK_NULL);
3686 
3687   Handle element = ik->allocate_instance_handle(CHECK_NULL);
3688 
3689   Handle decl_class(THREAD, holder->java_mirror());
3690   java_lang_reflect_RecordComponent::set_clazz(element(), decl_class());
3691 
3692   Symbol* name = holder->constants()->symbol_at(component->name_index()); // name_index is a utf8
3693   oop component_name = StringTable::intern(name, CHECK_NULL);
3694   java_lang_reflect_RecordComponent::set_name(element(), component_name);
3695 
3696   Symbol* type = holder->constants()->symbol_at(component->descriptor_index());
3697   Handle component_type_h =
3698     SystemDictionary::find_java_mirror_for_type(type, holder, SignatureStream::NCDFError, CHECK_NULL);
3699   java_lang_reflect_RecordComponent::set_type(element(), component_type_h());
3700 
3701   Method* accessor_method = nullptr;
3702   {
3703     // Prepend "()" to type to create the full method signature.
3704     ResourceMark rm(THREAD);
3705     int sig_len = type->utf8_length() + 3; // "()" and null char
3706     char* sig = NEW_RESOURCE_ARRAY(char, sig_len);
3707     jio_snprintf(sig, sig_len, "%c%c%s", JVM_SIGNATURE_FUNC, JVM_SIGNATURE_ENDFUNC, type->as_C_string());
3708     TempNewSymbol full_sig = SymbolTable::new_symbol(sig);
3709     accessor_method = holder->find_instance_method(name, full_sig, Klass::PrivateLookupMode::find);
3710   }
3711 
3712   if (accessor_method != nullptr) {
3713     methodHandle method(THREAD, accessor_method);
3714     oop m = Reflection::new_method(method, false, CHECK_NULL);
3715     java_lang_reflect_RecordComponent::set_accessor(element(), m);
3716   } else {
3717     java_lang_reflect_RecordComponent::set_accessor(element(), nullptr);
3718   }
3719 
3720   int sig_index = component->generic_signature_index();
3721   if (sig_index > 0) {
3722     Symbol* sig = holder->constants()->symbol_at(sig_index); // sig_index is a utf8
3723     oop component_sig = StringTable::intern(sig, CHECK_NULL);
3724     java_lang_reflect_RecordComponent::set_signature(element(), component_sig);
3725   } else {
3726     java_lang_reflect_RecordComponent::set_signature(element(), nullptr);
3727   }
3728 
3729   typeArrayOop annotation_oop = Annotations::make_java_array(component->annotations(), CHECK_NULL);
3730   java_lang_reflect_RecordComponent::set_annotations(element(), annotation_oop);
3731 
3732   typeArrayOop type_annotation_oop = Annotations::make_java_array(component->type_annotations(), CHECK_NULL);
3733   java_lang_reflect_RecordComponent::set_typeAnnotations(element(), type_annotation_oop);
3734 
3735   return element();
3736 }
3737 
3738 int reflect_ConstantPool::_oop_offset;
3739 
3740 #define CONSTANTPOOL_FIELDS_DO(macro) \
3741   macro(_oop_offset, k, "constantPoolOop", object_signature, false)
3742 
3743 void reflect_ConstantPool::compute_offsets() {
3744   InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3745   // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
3746   CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3747 }
3748 
3749 #if INCLUDE_CDS
3750 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3751   CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3752 }
3753 #endif
3754 
3755 int java_lang_reflect_Parameter::_name_offset;
3756 int java_lang_reflect_Parameter::_modifiers_offset;
3757 int java_lang_reflect_Parameter::_index_offset;
3758 int java_lang_reflect_Parameter::_executable_offset;
3759 
3760 #define PARAMETER_FIELDS_DO(macro) \
3761   macro(_name_offset,        k, vmSymbols::name_name(),        string_signature, false); \
3762   macro(_modifiers_offset,   k, vmSymbols::modifiers_name(),   int_signature,    false); \
3763   macro(_index_offset,       k, vmSymbols::index_name(),       int_signature,    false); \
3764   macro(_executable_offset,  k, vmSymbols::executable_name(),  executable_signature, false)
3765 
3766 void java_lang_reflect_Parameter::compute_offsets() {
3767   InstanceKlass* k = vmClasses::reflect_Parameter_klass();
3768   PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3769 }
3770 
3771 #if INCLUDE_CDS
3772 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3773   PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3774 }
3775 #endif
3776 
3777 Handle java_lang_reflect_Parameter::create(TRAPS) {
3778   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3779   Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3780   Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3781   InstanceKlass* ik = InstanceKlass::cast(k);
3782   // Ensure it is initialized
3783   ik->initialize(CHECK_NH);
3784   return ik->allocate_instance_handle(THREAD);
3785 }
3786 
3787 oop java_lang_reflect_Parameter::name(oop param) {
3788   return param->obj_field(_name_offset);
3789 }
3790 
3791 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3792   param->obj_field_put(_name_offset, value);
3793 }
3794 
3795 int java_lang_reflect_Parameter::modifiers(oop param) {
3796   return param->int_field(_modifiers_offset);
3797 }
3798 
3799 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3800   param->int_field_put(_modifiers_offset, value);
3801 }
3802 
3803 int java_lang_reflect_Parameter::index(oop param) {
3804   return param->int_field(_index_offset);
3805 }
3806 
3807 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3808   param->int_field_put(_index_offset, value);
3809 }
3810 
3811 oop java_lang_reflect_Parameter::executable(oop param) {
3812   return param->obj_field(_executable_offset);
3813 }
3814 
3815 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3816   param->obj_field_put(_executable_offset, value);
3817 }
3818 
3819 // java_lang_Module
3820 
3821 int java_lang_Module::_loader_offset;
3822 int java_lang_Module::_name_offset;
3823 int java_lang_Module::_module_entry_offset;
3824 
3825 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3826   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3827   return JavaCalls::construct_new_instance(vmClasses::Module_klass(),
3828                           vmSymbols::java_lang_module_init_signature(),
3829                           loader, module_name, CHECK_NH);
3830 }
3831 
3832 #define MODULE_FIELDS_DO(macro) \
3833   macro(_loader_offset,  k, vmSymbols::loader_name(),  classloader_signature, false); \
3834   macro(_name_offset,    k, vmSymbols::name_name(),    string_signature,      false)
3835 
3836 void java_lang_Module::compute_offsets() {
3837   InstanceKlass* k = vmClasses::Module_klass();
3838   MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3839   MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3840 }
3841 
3842 #if INCLUDE_CDS
3843 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3844   MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3845   MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3846 }
3847 #endif
3848 
3849 oop java_lang_Module::loader(oop module) {
3850   return module->obj_field(_loader_offset);
3851 }
3852 
3853 void java_lang_Module::set_loader(oop module, oop value) {
3854   module->obj_field_put(_loader_offset, value);
3855 }
3856 
3857 oop java_lang_Module::name(oop module) {
3858   return module->obj_field(_name_offset);
3859 }
3860 
3861 void java_lang_Module::set_name(oop module, oop value) {
3862   module->obj_field_put(_name_offset, value);
3863 }
3864 
3865 ModuleEntry* java_lang_Module::module_entry_raw(oop module) {
3866   assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3867   assert(module != nullptr, "module can't be null");
3868   assert(oopDesc::is_oop(module), "module must be oop");
3869 
3870   ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3871   return module_entry;
3872 }
3873 
3874 ModuleEntry* java_lang_Module::module_entry(oop module) {
3875   ModuleEntry* module_entry = module_entry_raw(module);
3876   if (module_entry == nullptr) {
3877     // If the inject field containing the ModuleEntry* is null then return the
3878     // class loader's unnamed module.
3879     oop loader = java_lang_Module::loader(module);
3880     Handle h_loader = Handle(Thread::current(), loader);
3881     ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3882     return loader_cld->unnamed_module();
3883   }
3884   return module_entry;
3885 }
3886 
3887 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3888   assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3889   assert(module != nullptr, "module can't be null");
3890   assert(oopDesc::is_oop(module), "module must be oop");
3891   module->address_field_put(_module_entry_offset, (address)module_entry);
3892 }
3893 
3894 Handle reflect_ConstantPool::create(TRAPS) {
3895   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3896   InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3897   // Ensure it is initialized
3898   k->initialize(CHECK_NH);
3899   return k->allocate_instance_handle(THREAD);
3900 }
3901 
3902 
3903 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3904   oop mirror = value->pool_holder()->java_mirror();
3905   // Save the mirror to get back the constant pool.
3906   reflect->obj_field_put(_oop_offset, mirror);
3907 }
3908 
3909 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3910 
3911   oop mirror = reflect->obj_field(_oop_offset);
3912   Klass* k = java_lang_Class::as_Klass(mirror);
3913   assert(k->is_instance_klass(), "Must be");
3914 
3915   // Get the constant pool back from the klass.  Since class redefinition
3916   // merges the new constant pool into the old, this is essentially the
3917   // same constant pool as the original.  If constant pool merging is
3918   // no longer done in the future, this will have to change to save
3919   // the original.
3920   return InstanceKlass::cast(k)->constants();
3921 }
3922 
3923 
3924 // Support for java_lang_ref_Reference
3925 
3926 bool java_lang_ref_Reference::_offsets_initialized;
3927 
3928 int java_lang_ref_Reference::_referent_offset;
3929 int java_lang_ref_Reference::_queue_offset;
3930 int java_lang_ref_Reference::_next_offset;
3931 int java_lang_ref_Reference::_discovered_offset;
3932 
3933 #define REFERENCE_FIELDS_DO(macro) \
3934   macro(_referent_offset,   k, "referent", object_signature, false); \
3935   macro(_queue_offset,      k, "queue", referencequeue_signature, false); \
3936   macro(_next_offset,       k, "next", reference_signature, false); \
3937   macro(_discovered_offset, k, "discovered", reference_signature, false);
3938 
3939 void java_lang_ref_Reference::compute_offsets() {
3940   if (_offsets_initialized) {
3941     return;
3942   }
3943   _offsets_initialized = true;
3944   InstanceKlass* k = vmClasses::Reference_klass();
3945   REFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3946 }
3947 
3948 #if INCLUDE_CDS
3949 void java_lang_ref_Reference::serialize_offsets(SerializeClosure* f) {
3950   f->do_bool(&_offsets_initialized);
3951   REFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3952 }
3953 #endif
3954 
3955 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
3956   assert(obj != nullptr, "sanity");
3957   if (offset != _referent_offset) {
3958     return false;
3959   }
3960 
3961   Klass* k = obj->klass();
3962   if (!k->is_instance_klass()) {
3963     return false;
3964   }
3965 
3966   InstanceKlass* ik = InstanceKlass::cast(obj->klass());
3967   bool is_reference = ik->reference_type() != REF_NONE;
3968   assert(!is_reference || ik->is_subclass_of(vmClasses::Reference_klass()), "sanity");
3969   return is_reference;
3970 }
3971 
3972 int java_lang_boxing_object::_value_offset;
3973 int java_lang_boxing_object::_long_value_offset;
3974 
3975 #define BOXING_FIELDS_DO(macro) \
3976   macro(_value_offset,      integerKlass, "value", int_signature, false); \
3977   macro(_long_value_offset, longKlass, "value", long_signature, false);
3978 
3979 void java_lang_boxing_object::compute_offsets() {
3980   InstanceKlass* integerKlass = vmClasses::Integer_klass();
3981   InstanceKlass* longKlass = vmClasses::Long_klass();
3982   BOXING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3983 }
3984 
3985 #if INCLUDE_CDS
3986 void java_lang_boxing_object::serialize_offsets(SerializeClosure* f) {
3987   BOXING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3988 }
3989 #endif
3990 
3991 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
3992   Klass* k = vmClasses::box_klass(type);
3993   if (k == nullptr)  return nullptr;
3994   InstanceKlass* ik = InstanceKlass::cast(k);
3995   if (!ik->is_initialized()) {
3996     ik->initialize(CHECK_NULL);
3997   }
3998   return ik->allocate_instance(THREAD);
3999 }
4000 
4001 
4002 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
4003   oop box = initialize_and_allocate(type, CHECK_NULL);
4004   if (box == nullptr)  return nullptr;
4005   switch (type) {
4006     case T_BOOLEAN:
4007       box->bool_field_put(_value_offset, value->z);
4008       break;
4009     case T_CHAR:
4010       box->char_field_put(_value_offset, value->c);
4011       break;
4012     case T_FLOAT:
4013       box->float_field_put(_value_offset, value->f);
4014       break;
4015     case T_DOUBLE:
4016       box->double_field_put(_long_value_offset, value->d);
4017       break;
4018     case T_BYTE:
4019       box->byte_field_put(_value_offset, value->b);
4020       break;
4021     case T_SHORT:
4022       box->short_field_put(_value_offset, value->s);
4023       break;
4024     case T_INT:
4025       box->int_field_put(_value_offset, value->i);
4026       break;
4027     case T_LONG:
4028       box->long_field_put(_long_value_offset, value->j);
4029       break;
4030     default:
4031       return nullptr;
4032   }
4033   return box;
4034 }
4035 
4036 
4037 BasicType java_lang_boxing_object::basic_type(oop box) {
4038   if (box == nullptr)  return T_ILLEGAL;
4039   BasicType type = vmClasses::box_klass_type(box->klass());
4040   if (type == T_OBJECT)         // 'unknown' value returned by SD::bkt
4041     return T_ILLEGAL;
4042   return type;
4043 }
4044 
4045 
4046 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
4047   BasicType type = vmClasses::box_klass_type(box->klass());
4048   switch (type) {
4049   case T_BOOLEAN:
4050     value->z = box->bool_field(_value_offset);
4051     break;
4052   case T_CHAR:
4053     value->c = box->char_field(_value_offset);
4054     break;
4055   case T_FLOAT:
4056     value->f = box->float_field(_value_offset);
4057     break;
4058   case T_DOUBLE:
4059     value->d = box->double_field(_long_value_offset);
4060     break;
4061   case T_BYTE:
4062     value->b = box->byte_field(_value_offset);
4063     break;
4064   case T_SHORT:
4065     value->s = box->short_field(_value_offset);
4066     break;
4067   case T_INT:
4068     value->i = box->int_field(_value_offset);
4069     break;
4070   case T_LONG:
4071     value->j = box->long_field(_long_value_offset);
4072     break;
4073   default:
4074     return T_ILLEGAL;
4075   } // end switch
4076   return type;
4077 }
4078 
4079 
4080 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
4081   BasicType type = vmClasses::box_klass_type(box->klass());
4082   switch (type) {
4083   case T_BOOLEAN:
4084     box->bool_field_put(_value_offset, value->z);
4085     break;
4086   case T_CHAR:
4087     box->char_field_put(_value_offset, value->c);
4088     break;
4089   case T_FLOAT:
4090     box->float_field_put(_value_offset, value->f);
4091     break;
4092   case T_DOUBLE:
4093     box->double_field_put(_long_value_offset, value->d);
4094     break;
4095   case T_BYTE:
4096     box->byte_field_put(_value_offset, value->b);
4097     break;
4098   case T_SHORT:
4099     box->short_field_put(_value_offset, value->s);
4100     break;
4101   case T_INT:
4102     box->int_field_put(_value_offset, value->i);
4103     break;
4104   case T_LONG:
4105     box->long_field_put(_long_value_offset, value->j);
4106     break;
4107   default:
4108     return T_ILLEGAL;
4109   } // end switch
4110   return type;
4111 }
4112 
4113 
4114 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
4115   switch (type) {
4116   case T_BOOLEAN:   st->print("%s", value->z ? "true" : "false");   break;
4117   case T_CHAR:      st->print("%d", value->c);                      break;
4118   case T_BYTE:      st->print("%d", value->b);                      break;
4119   case T_SHORT:     st->print("%d", value->s);                      break;
4120   case T_INT:       st->print("%d", value->i);                      break;
4121   case T_LONG:      st->print(JLONG_FORMAT, value->j);              break;
4122   case T_FLOAT:     st->print("%f", value->f);                      break;
4123   case T_DOUBLE:    st->print("%lf", value->d);                     break;
4124   default:          st->print("type %d?", type);                    break;
4125   }
4126 }
4127 
4128 
4129 // Support for java_lang_ref_SoftReference
4130 //
4131 
4132 int java_lang_ref_SoftReference::_timestamp_offset;
4133 int java_lang_ref_SoftReference::_static_clock_offset;
4134 
4135 #define SOFTREFERENCE_FIELDS_DO(macro) \
4136   macro(_timestamp_offset,    k, "timestamp", long_signature, false); \
4137   macro(_static_clock_offset, k, "clock",     long_signature, true)
4138 
4139 void java_lang_ref_SoftReference::compute_offsets() {
4140   InstanceKlass* k = vmClasses::SoftReference_klass();
4141   SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4142 }
4143 
4144 #if INCLUDE_CDS
4145 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
4146   SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4147 }
4148 #endif
4149 
4150 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
4151   return ref->long_field(_timestamp_offset);
4152 }
4153 
4154 jlong java_lang_ref_SoftReference::clock() {
4155   InstanceKlass* ik = vmClasses::SoftReference_klass();
4156   oop base = ik->static_field_base_raw();
4157   return base->long_field(_static_clock_offset);
4158 }
4159 
4160 void java_lang_ref_SoftReference::set_clock(jlong value) {
4161   InstanceKlass* ik = vmClasses::SoftReference_klass();
4162   oop base = ik->static_field_base_raw();
4163   base->long_field_put(_static_clock_offset, value);
4164 }
4165 
4166 // Support for java_lang_invoke_DirectMethodHandle
4167 
4168 int java_lang_invoke_DirectMethodHandle::_member_offset;
4169 
4170 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
4171   oop member_name = nullptr;
4172   assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
4173          "a DirectMethodHandle oop is expected");
4174   return dmh->obj_field(_member_offset);
4175 }
4176 
4177 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
4178   macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
4179 
4180 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
4181   InstanceKlass* k = vmClasses::DirectMethodHandle_klass();
4182   DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4183 }
4184 
4185 #if INCLUDE_CDS
4186 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
4187   DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4188 }
4189 #endif
4190 
4191 // Support for java_lang_invoke_MethodHandle
4192 
4193 int java_lang_invoke_MethodHandle::_type_offset;
4194 int java_lang_invoke_MethodHandle::_form_offset;
4195 
4196 int java_lang_invoke_MemberName::_clazz_offset;
4197 int java_lang_invoke_MemberName::_name_offset;
4198 int java_lang_invoke_MemberName::_type_offset;
4199 int java_lang_invoke_MemberName::_flags_offset;
4200 int java_lang_invoke_MemberName::_method_offset;
4201 int java_lang_invoke_MemberName::_vmindex_offset;
4202 
4203 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
4204 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
4205 
4206 int java_lang_invoke_LambdaForm::_vmentry_offset;
4207 
4208 #define METHODHANDLE_FIELDS_DO(macro) \
4209   macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
4210   macro(_form_offset, k, "form",                 java_lang_invoke_LambdaForm_signature, false)
4211 
4212 void java_lang_invoke_MethodHandle::compute_offsets() {
4213   InstanceKlass* k = vmClasses::MethodHandle_klass();
4214   METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4215 }
4216 
4217 #if INCLUDE_CDS
4218 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
4219   METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4220 }
4221 #endif
4222 
4223 #define MEMBERNAME_FIELDS_DO(macro) \
4224   macro(_clazz_offset,   k, vmSymbols::clazz_name(),   class_signature,  false); \
4225   macro(_name_offset,    k, vmSymbols::name_name(),    string_signature, false); \
4226   macro(_type_offset,    k, vmSymbols::type_name(),    object_signature, false); \
4227   macro(_flags_offset,   k, vmSymbols::flags_name(),   int_signature,    false); \
4228   macro(_method_offset,  k, vmSymbols::method_name(),  java_lang_invoke_ResolvedMethodName_signature, false)
4229 
4230 void java_lang_invoke_MemberName::compute_offsets() {
4231   InstanceKlass* k = vmClasses::MemberName_klass();
4232   MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4233   MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4234 }
4235 
4236 #if INCLUDE_CDS
4237 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
4238   MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4239   MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4240 }
4241 #endif
4242 
4243 #define RESOLVEDMETHOD_FIELDS_DO(macro) \
4244   macro(_vmholder_offset, k, "vmholder", class_signature, false)
4245 
4246 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
4247   InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4248   assert(k != nullptr, "jdk mismatch");
4249   RESOLVEDMETHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4250   RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4251 }
4252 
4253 #if INCLUDE_CDS
4254 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
4255   RESOLVEDMETHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4256   RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4257 }
4258 #endif
4259 
4260 #define LAMBDAFORM_FIELDS_DO(macro) \
4261   macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
4262 
4263 void java_lang_invoke_LambdaForm::compute_offsets() {
4264   InstanceKlass* k = vmClasses::LambdaForm_klass();
4265   assert (k != nullptr, "jdk mismatch");
4266   LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4267 }
4268 
4269 #if INCLUDE_CDS
4270 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
4271   LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4272 }
4273 #endif
4274 
4275 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
4276   return obj != nullptr && is_subclass(obj->klass());
4277 }
4278 
4279 int jdk_internal_foreign_abi_NativeEntryPoint::_method_type_offset;
4280 int jdk_internal_foreign_abi_NativeEntryPoint::_downcall_stub_address_offset;
4281 
4282 #define NEP_FIELDS_DO(macro) \
4283   macro(_method_type_offset,           k, "methodType",          java_lang_invoke_MethodType_signature, false); \
4284   macro(_downcall_stub_address_offset, k, "downcallStubAddress", long_signature, false);
4285 
4286 bool jdk_internal_foreign_abi_NativeEntryPoint::is_instance(oop obj) {
4287   return obj != nullptr && is_subclass(obj->klass());
4288 }
4289 
4290 void jdk_internal_foreign_abi_NativeEntryPoint::compute_offsets() {
4291   InstanceKlass* k = vmClasses::NativeEntryPoint_klass();
4292   NEP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4293 }
4294 
4295 #if INCLUDE_CDS
4296 void jdk_internal_foreign_abi_NativeEntryPoint::serialize_offsets(SerializeClosure* f) {
4297   NEP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4298 }
4299 #endif
4300 
4301 oop jdk_internal_foreign_abi_NativeEntryPoint::method_type(oop entry) {
4302   return entry->obj_field(_method_type_offset);
4303 }
4304 
4305 jlong jdk_internal_foreign_abi_NativeEntryPoint::downcall_stub_address(oop entry) {
4306   return entry->long_field(_downcall_stub_address_offset);
4307 }
4308 
4309 int jdk_internal_foreign_abi_ABIDescriptor::_inputStorage_offset;
4310 int jdk_internal_foreign_abi_ABIDescriptor::_outputStorage_offset;
4311 int jdk_internal_foreign_abi_ABIDescriptor::_volatileStorage_offset;
4312 int jdk_internal_foreign_abi_ABIDescriptor::_stackAlignment_offset;
4313 int jdk_internal_foreign_abi_ABIDescriptor::_shadowSpace_offset;
4314 int jdk_internal_foreign_abi_ABIDescriptor::_scratch1_offset;
4315 int jdk_internal_foreign_abi_ABIDescriptor::_scratch2_offset;
4316 
4317 #define ABIDescriptor_FIELDS_DO(macro) \
4318   macro(_inputStorage_offset,    k, "inputStorage",    jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4319   macro(_outputStorage_offset,   k, "outputStorage",   jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4320   macro(_volatileStorage_offset, k, "volatileStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4321   macro(_stackAlignment_offset,  k, "stackAlignment",  int_signature, false); \
4322   macro(_shadowSpace_offset,     k, "shadowSpace",     int_signature, false); \
4323   macro(_scratch1_offset,        k, "scratch1",        jdk_internal_foreign_abi_VMStorage_signature, false); \
4324   macro(_scratch2_offset,        k, "scratch2",        jdk_internal_foreign_abi_VMStorage_signature, false);
4325 
4326 bool jdk_internal_foreign_abi_ABIDescriptor::is_instance(oop obj) {
4327   return obj != nullptr && is_subclass(obj->klass());
4328 }
4329 
4330 void jdk_internal_foreign_abi_ABIDescriptor::compute_offsets() {
4331   InstanceKlass* k = vmClasses::ABIDescriptor_klass();
4332   ABIDescriptor_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4333 }
4334 
4335 #if INCLUDE_CDS
4336 void jdk_internal_foreign_abi_ABIDescriptor::serialize_offsets(SerializeClosure* f) {
4337   ABIDescriptor_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4338 }
4339 #endif
4340 
4341 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::inputStorage(oop entry) {
4342   return oop_cast<objArrayOop>(entry->obj_field(_inputStorage_offset));
4343 }
4344 
4345 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::outputStorage(oop entry) {
4346   return oop_cast<objArrayOop>(entry->obj_field(_outputStorage_offset));
4347 }
4348 
4349 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::volatileStorage(oop entry) {
4350   return oop_cast<objArrayOop>(entry->obj_field(_volatileStorage_offset));
4351 }
4352 
4353 jint jdk_internal_foreign_abi_ABIDescriptor::stackAlignment(oop entry) {
4354   return entry->int_field(_stackAlignment_offset);
4355 }
4356 
4357 jint jdk_internal_foreign_abi_ABIDescriptor::shadowSpace(oop entry) {
4358   return entry->int_field(_shadowSpace_offset);
4359 }
4360 
4361 oop jdk_internal_foreign_abi_ABIDescriptor::scratch1(oop entry) {
4362   return entry->obj_field(_scratch1_offset);
4363 }
4364 
4365 oop jdk_internal_foreign_abi_ABIDescriptor::scratch2(oop entry) {
4366   return entry->obj_field(_scratch2_offset);
4367 }
4368 
4369 int jdk_internal_foreign_abi_VMStorage::_type_offset;
4370 int jdk_internal_foreign_abi_VMStorage::_indexOrOffset_offset;
4371 int jdk_internal_foreign_abi_VMStorage::_segmentMaskOrSize_offset;
4372 int jdk_internal_foreign_abi_VMStorage::_debugName_offset;
4373 
4374 #define VMStorage_FIELDS_DO(macro) \
4375   macro(_type_offset,              k, "type",              byte_signature, false); \
4376   macro(_indexOrOffset_offset,     k, "indexOrOffset",     int_signature, false); \
4377   macro(_segmentMaskOrSize_offset, k, "segmentMaskOrSize", short_signature, false); \
4378   macro(_debugName_offset,         k, "debugName",         string_signature, false); \
4379 
4380 bool jdk_internal_foreign_abi_VMStorage::is_instance(oop obj) {
4381   return obj != nullptr && is_subclass(obj->klass());
4382 }
4383 
4384 void jdk_internal_foreign_abi_VMStorage::compute_offsets() {
4385   InstanceKlass* k = vmClasses::VMStorage_klass();
4386   VMStorage_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4387 }
4388 
4389 #if INCLUDE_CDS
4390 void jdk_internal_foreign_abi_VMStorage::serialize_offsets(SerializeClosure* f) {
4391   VMStorage_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4392 }
4393 #endif
4394 
4395 jbyte jdk_internal_foreign_abi_VMStorage::type(oop entry) {
4396   return entry->byte_field(_type_offset);
4397 }
4398 
4399 jint jdk_internal_foreign_abi_VMStorage::index_or_offset(oop entry) {
4400   return entry->int_field(_indexOrOffset_offset);
4401 }
4402 
4403 jshort jdk_internal_foreign_abi_VMStorage::segment_mask_or_size(oop entry) {
4404   return entry->short_field(_segmentMaskOrSize_offset);
4405 }
4406 
4407 oop jdk_internal_foreign_abi_VMStorage::debugName(oop entry) {
4408   return entry->obj_field(_debugName_offset);
4409 }
4410 
4411 int jdk_internal_foreign_abi_CallConv::_argRegs_offset;
4412 int jdk_internal_foreign_abi_CallConv::_retRegs_offset;
4413 
4414 #define CallConv_FIELDS_DO(macro) \
4415   macro(_argRegs_offset, k, "argRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4416   macro(_retRegs_offset, k, "retRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4417 
4418 bool jdk_internal_foreign_abi_CallConv::is_instance(oop obj) {
4419   return obj != nullptr && is_subclass(obj->klass());
4420 }
4421 
4422 void jdk_internal_foreign_abi_CallConv::compute_offsets() {
4423   InstanceKlass* k = vmClasses::CallConv_klass();
4424   CallConv_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4425 }
4426 
4427 #if INCLUDE_CDS
4428 void jdk_internal_foreign_abi_CallConv::serialize_offsets(SerializeClosure* f) {
4429   CallConv_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4430 }
4431 #endif
4432 
4433 objArrayOop jdk_internal_foreign_abi_CallConv::argRegs(oop entry) {
4434   return oop_cast<objArrayOop>(entry->obj_field(_argRegs_offset));
4435 }
4436 
4437 objArrayOop jdk_internal_foreign_abi_CallConv::retRegs(oop entry) {
4438   return oop_cast<objArrayOop>(entry->obj_field(_retRegs_offset));
4439 }
4440 
4441 oop java_lang_invoke_MethodHandle::type(oop mh) {
4442   return mh->obj_field(_type_offset);
4443 }
4444 
4445 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
4446   mh->obj_field_put(_type_offset, mtype);
4447 }
4448 
4449 oop java_lang_invoke_MethodHandle::form(oop mh) {
4450   assert(_form_offset != 0, "");
4451   return mh->obj_field(_form_offset);
4452 }
4453 
4454 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
4455   assert(_form_offset != 0, "");
4456   mh->obj_field_put(_form_offset, lform);
4457 }
4458 
4459 /// MemberName accessors
4460 
4461 oop java_lang_invoke_MemberName::clazz(oop mname) {
4462   assert(is_instance(mname), "wrong type");
4463   return mname->obj_field(_clazz_offset);
4464 }
4465 
4466 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
4467   assert(is_instance(mname), "wrong type");
4468   mname->obj_field_put(_clazz_offset, clazz);
4469 }
4470 
4471 oop java_lang_invoke_MemberName::name(oop mname) {
4472   assert(is_instance(mname), "wrong type");
4473   return mname->obj_field(_name_offset);
4474 }
4475 
4476 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
4477   assert(is_instance(mname), "wrong type");
4478   mname->obj_field_put(_name_offset, name);
4479 }
4480 
4481 oop java_lang_invoke_MemberName::type(oop mname) {
4482   assert(is_instance(mname), "wrong type");
4483   return mname->obj_field(_type_offset);
4484 }
4485 
4486 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
4487   assert(is_instance(mname), "wrong type");
4488   mname->obj_field_put(_type_offset, type);
4489 }
4490 
4491 int java_lang_invoke_MemberName::flags(oop mname) {
4492   assert(is_instance(mname), "wrong type");
4493   return mname->int_field(_flags_offset);
4494 }
4495 
4496 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
4497   assert(is_instance(mname), "wrong type");
4498   mname->int_field_put(_flags_offset, flags);
4499 }
4500 
4501 
4502 // Return vmtarget from ResolvedMethodName method field through indirection
4503 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
4504   assert(is_instance(mname), "wrong type");
4505   oop method = mname->obj_field(_method_offset);
4506   return method == nullptr ? nullptr : java_lang_invoke_ResolvedMethodName::vmtarget(method);
4507 }
4508 
4509 bool java_lang_invoke_MemberName::is_method(oop mname) {
4510   assert(is_instance(mname), "must be MemberName");
4511   return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
4512 }
4513 
4514 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
4515   assert(is_instance(mname), "wrong type");
4516   mname->obj_field_put(_method_offset, resolved_method);
4517 }
4518 
4519 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
4520   assert(is_instance(mname), "wrong type");
4521   return (intptr_t) mname->address_field(_vmindex_offset);
4522 }
4523 
4524 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
4525   assert(is_instance(mname), "wrong type");
4526   mname->address_field_put(_vmindex_offset, (address) index);
4527 }
4528 
4529 
4530 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
4531   assert(is_instance(resolved_method), "wrong type");
4532   Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
4533   assert(m->is_method(), "must be");
4534   return m;
4535 }
4536 
4537 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
4538 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
4539   assert(is_instance(resolved_method), "wrong type");
4540   resolved_method->address_field_put(_vmtarget_offset, (address)m);
4541 }
4542 
4543 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) {
4544   assert(is_instance(resolved_method), "wrong type");
4545   resolved_method->obj_field_put(_vmholder_offset, holder);
4546 }
4547 
4548 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
4549   const Method* method = m();
4550 
4551   // lookup ResolvedMethod oop in the table, or create a new one and intern it
4552   oop resolved_method = ResolvedMethodTable::find_method(method);
4553   if (resolved_method != nullptr) {
4554     return resolved_method;
4555   }
4556 
4557   InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4558   if (!k->is_initialized()) {
4559     k->initialize(CHECK_NULL);
4560   }
4561 
4562   oop new_resolved_method = k->allocate_instance(CHECK_NULL);
4563 
4564   NoSafepointVerifier nsv;
4565 
4566   if (method->is_old()) {
4567     method = (method->is_deleted()) ? Universe::throw_no_such_method_error() :
4568                                       method->get_new_method();
4569   }
4570 
4571   InstanceKlass* holder = method->method_holder();
4572 
4573   set_vmtarget(new_resolved_method, const_cast<Method*>(method));
4574   // Add a reference to the loader (actually mirror because hidden classes may not have
4575   // distinct loaders) to ensure the metadata is kept alive.
4576   // This mirror may be different than the one in clazz field.
4577   set_vmholder(new_resolved_method, holder->java_mirror());
4578 
4579   // Set flag in class to indicate this InstanceKlass has entries in the table
4580   // to avoid walking table during redefinition if none of the redefined classes
4581   // have any membernames in the table.
4582   holder->set_has_resolved_methods();
4583 
4584   return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method));
4585 }
4586 
4587 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
4588   assert(is_instance(lform), "wrong type");
4589   return lform->obj_field(_vmentry_offset);
4590 }
4591 
4592 
4593 // Support for java_lang_invoke_MethodType
4594 
4595 int java_lang_invoke_MethodType::_rtype_offset;
4596 int java_lang_invoke_MethodType::_ptypes_offset;
4597 
4598 #define METHODTYPE_FIELDS_DO(macro) \
4599   macro(_rtype_offset,  k, "rtype",  class_signature,       false); \
4600   macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
4601 
4602 void java_lang_invoke_MethodType::compute_offsets() {
4603   InstanceKlass* k = vmClasses::MethodType_klass();
4604   METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4605 }
4606 
4607 #if INCLUDE_CDS
4608 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
4609   METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4610 }
4611 #endif
4612 
4613 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
4614   st->print("(");
4615   objArrayOop pts = ptypes(mt);
4616   if (pts != nullptr) {
4617     for (int i = 0, limit = pts->length(); i < limit; i++) {
4618       java_lang_Class::print_signature(pts->obj_at(i), st);
4619     }
4620   } else {
4621     st->print("null");
4622   }
4623   st->print(")");
4624   oop rt = rtype(mt);
4625   if (rt != nullptr) {
4626     java_lang_Class::print_signature(rt, st);
4627   } else {
4628     st->print("null");
4629   }
4630 }
4631 
4632 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) {
4633   ResourceMark rm;
4634   stringStream buffer(128);
4635   print_signature(mt, &buffer);
4636   const char* sigstr =       buffer.base();
4637   int         siglen = (int) buffer.size();
4638   Symbol *name;
4639   if (!intern_if_not_found) {
4640     name = SymbolTable::probe(sigstr, siglen);
4641   } else {
4642     name = SymbolTable::new_symbol(sigstr, siglen);
4643   }
4644   return name;
4645 }
4646 
4647 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
4648   if (mt1 == mt2)
4649     return true;
4650   if (rtype(mt1) != rtype(mt2))
4651     return false;
4652   if (ptype_count(mt1) != ptype_count(mt2))
4653     return false;
4654   for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
4655     if (ptype(mt1, i) != ptype(mt2, i))
4656       return false;
4657   }
4658   return true;
4659 }
4660 
4661 oop java_lang_invoke_MethodType::rtype(oop mt) {
4662   assert(is_instance(mt), "must be a MethodType");
4663   return mt->obj_field(_rtype_offset);
4664 }
4665 
4666 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
4667   assert(is_instance(mt), "must be a MethodType");
4668   return (objArrayOop) mt->obj_field(_ptypes_offset);
4669 }
4670 
4671 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
4672   return ptypes(mt)->obj_at(idx);
4673 }
4674 
4675 int java_lang_invoke_MethodType::ptype_count(oop mt) {
4676   return ptypes(mt)->length();
4677 }
4678 
4679 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
4680   objArrayOop pts = ptypes(mt);
4681   int count = pts->length();
4682   int slots = 0;
4683   for (int i = 0; i < count; i++) {
4684     BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
4685     slots += type2size[bt];
4686   }
4687   return slots;
4688 }
4689 
4690 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
4691   BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
4692   return type2size[bt];
4693 }
4694 
4695 
4696 // Support for java_lang_invoke_CallSite
4697 
4698 int java_lang_invoke_CallSite::_target_offset;
4699 int java_lang_invoke_CallSite::_vmdependencies_offset;
4700 int java_lang_invoke_CallSite::_last_cleanup_offset;
4701 
4702 #define CALLSITE_FIELDS_DO(macro) \
4703   macro(_target_offset,  k, "target", java_lang_invoke_MethodHandle_signature, false); \
4704 
4705 void java_lang_invoke_CallSite::compute_offsets() {
4706   InstanceKlass* k = vmClasses::CallSite_klass();
4707   CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4708   CALLSITE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4709 }
4710 
4711 #if INCLUDE_CDS
4712 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
4713   CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4714   CALLSITE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4715 }
4716 #endif
4717 
4718 DependencyContext java_lang_invoke_CallSite::vmdependencies(oop call_site) {
4719   assert(java_lang_invoke_CallSite::is_instance(call_site), "");
4720   nmethodBucket* volatile* vmdeps_addr = call_site->field_addr<nmethodBucket* volatile>(_vmdependencies_offset);
4721   volatile uint64_t* last_cleanup_addr = call_site->field_addr<volatile uint64_t>(_last_cleanup_offset);
4722   DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr);
4723   return dep_ctx;
4724 }
4725 
4726 // Support for java_lang_invoke_ConstantCallSite
4727 
4728 int java_lang_invoke_ConstantCallSite::_is_frozen_offset;
4729 
4730 #define CONSTANTCALLSITE_FIELDS_DO(macro) \
4731   macro(_is_frozen_offset, k, "isFrozen", bool_signature, false)
4732 
4733 void java_lang_invoke_ConstantCallSite::compute_offsets() {
4734   InstanceKlass* k = vmClasses::ConstantCallSite_klass();
4735   CONSTANTCALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4736 }
4737 
4738 #if INCLUDE_CDS
4739 void java_lang_invoke_ConstantCallSite::serialize_offsets(SerializeClosure* f) {
4740   CONSTANTCALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4741 }
4742 #endif
4743 
4744 // Support for java_lang_ClassLoader
4745 
4746 int  java_lang_ClassLoader::_loader_data_offset;
4747 int  java_lang_ClassLoader::_parallelCapable_offset;
4748 int  java_lang_ClassLoader::_name_offset;
4749 int  java_lang_ClassLoader::_nameAndId_offset;
4750 int  java_lang_ClassLoader::_unnamedModule_offset;
4751 int  java_lang_ClassLoader::_parent_offset;
4752 
4753 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
4754   assert(loader != nullptr, "loader must not be null");
4755   assert(oopDesc::is_oop(loader), "loader must be oop");
4756   return Atomic::load_acquire(loader->field_addr<ClassLoaderData*>(_loader_data_offset));
4757 }
4758 
4759 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
4760   assert(loader != nullptr, "loader must not be null");
4761   assert(oopDesc::is_oop(loader), "loader must be oop");
4762   return *loader->field_addr<ClassLoaderData*>(_loader_data_offset);
4763 }
4764 
4765 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
4766   assert(loader != nullptr, "loader must not be null");
4767   assert(oopDesc::is_oop(loader), "loader must be oop");
4768   Atomic::release_store(loader->field_addr<ClassLoaderData*>(_loader_data_offset), new_data);
4769 }
4770 
4771 #define CLASSLOADER_FIELDS_DO(macro) \
4772   macro(_parallelCapable_offset, k1, "parallelLockMap",      concurrenthashmap_signature, false); \
4773   macro(_name_offset,            k1, vmSymbols::name_name(), string_signature, false); \
4774   macro(_nameAndId_offset,       k1, "nameAndId",            string_signature, false); \
4775   macro(_unnamedModule_offset,   k1, "unnamedModule",        module_signature, false); \
4776   macro(_parent_offset,          k1, "parent",               classloader_signature, false)
4777 
4778 void java_lang_ClassLoader::compute_offsets() {
4779   InstanceKlass* k1 = vmClasses::ClassLoader_klass();
4780   CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4781 
4782   CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4783 }
4784 
4785 #if INCLUDE_CDS
4786 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
4787   CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4788   CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4789 }
4790 #endif
4791 
4792 oop java_lang_ClassLoader::parent(oop loader) {
4793   assert(is_instance(loader), "loader must be oop");
4794   return loader->obj_field(_parent_offset);
4795 }
4796 
4797 oop java_lang_ClassLoader::parent_no_keepalive(oop loader) {
4798   assert(is_instance(loader), "loader must be oop");
4799   return loader->obj_field_access<AS_NO_KEEPALIVE>(_parent_offset);
4800 }
4801 
4802 // Returns the name field of this class loader.  If the name field has not
4803 // been set, null will be returned.
4804 oop java_lang_ClassLoader::name(oop loader) {
4805   assert(is_instance(loader), "loader must be oop");
4806   return loader->obj_field(_name_offset);
4807 }
4808 
4809 // Returns the nameAndId field of this class loader. The format is
4810 // as follows:
4811 //   If the defining loader has a name explicitly set then '<loader-name>' @<id>
4812 //   If the defining loader has no name then <qualified-class-name> @<id>
4813 //   If built-in loader, then omit '@<id>' as there is only one instance.
4814 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
4815 oop java_lang_ClassLoader::nameAndId(oop loader) {
4816   assert(is_instance(loader), "loader must be oop");
4817   return loader->obj_field(_nameAndId_offset);
4818 }
4819 
4820 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
4821   assert(is_instance(loader), "loader must be oop");
4822   assert(cl == nullptr || is_instance(cl), "cl argument must be oop");
4823   oop acl = loader;
4824   debug_only(jint loop_count = 0);
4825   // This loop taken verbatim from ClassLoader.java:
4826   do {
4827     acl = parent(acl);
4828     if (cl == acl) {
4829       return true;
4830     }
4831     assert(++loop_count > 0, "loop_count overflow");
4832   } while (acl != nullptr);
4833   return false;
4834 }
4835 
4836 bool java_lang_ClassLoader::is_instance(oop obj) {
4837   return obj != nullptr && is_subclass(obj->klass());
4838 }
4839 
4840 
4841 // For class loader classes, parallelCapable defined
4842 // based on non-null field
4843 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
4844 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
4845   assert(_parallelCapable_offset != 0, "offsets should have been initialized");
4846   return (class_loader->obj_field(_parallelCapable_offset) != nullptr);
4847 }
4848 
4849 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
4850   oop cl = SystemDictionary::java_system_loader();
4851   while(cl != nullptr) {
4852     if (cl == loader) return true;
4853     cl = parent(cl);
4854   }
4855   return false;
4856 }
4857 
4858 oop java_lang_ClassLoader::unnamedModule(oop loader) {
4859   assert(is_instance(loader), "loader must be oop");
4860   return loader->obj_field(_unnamedModule_offset);
4861 }
4862 
4863 // Support for java_lang_System
4864 //
4865 
4866 int java_lang_System::_static_in_offset;
4867 int java_lang_System::_static_out_offset;
4868 int java_lang_System::_static_err_offset;
4869 
4870 #define SYSTEM_FIELDS_DO(macro) \
4871   macro(_static_in_offset,  k, "in",  input_stream_signature, true); \
4872   macro(_static_out_offset, k, "out", print_stream_signature, true); \
4873   macro(_static_err_offset, k, "err", print_stream_signature, true);
4874 
4875 void java_lang_System::compute_offsets() {
4876   InstanceKlass* k = vmClasses::System_klass();
4877   SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4878 }
4879 
4880 #if INCLUDE_CDS
4881 void java_lang_System::serialize_offsets(SerializeClosure* f) {
4882    SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4883 }
4884 #endif
4885 
4886 // Support for jdk_internal_misc_UnsafeConstants
4887 //
4888 class UnsafeConstantsFixup : public FieldClosure {
4889 private:
4890   int _address_size;
4891   int _page_size;
4892   bool _big_endian;
4893   bool _use_unaligned_access;
4894   int _data_cache_line_flush_size;
4895 public:
4896   UnsafeConstantsFixup() {
4897     // round up values for all static final fields
4898     _address_size = sizeof(void*);
4899     _page_size = AIX_ONLY(sysconf(_SC_PAGESIZE)) NOT_AIX((int)os::vm_page_size());
4900     _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true);
4901     _use_unaligned_access = UseUnalignedAccesses;
4902     _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size();
4903   }
4904 
4905   void do_field(fieldDescriptor* fd) {
4906     oop mirror = fd->field_holder()->java_mirror();
4907     assert(mirror != nullptr, "UnsafeConstants must have mirror already");
4908     assert(fd->field_holder() == vmClasses::UnsafeConstants_klass(), "Should be UnsafeConstants");
4909     assert(fd->is_final(), "fields of UnsafeConstants must be final");
4910     assert(fd->is_static(), "fields of UnsafeConstants must be static");
4911     if (fd->name() == vmSymbols::address_size_name()) {
4912       mirror->int_field_put(fd->offset(), _address_size);
4913     } else if (fd->name() == vmSymbols::page_size_name()) {
4914       mirror->int_field_put(fd->offset(), _page_size);
4915     } else if (fd->name() == vmSymbols::big_endian_name()) {
4916       mirror->bool_field_put(fd->offset(), _big_endian);
4917     } else if (fd->name() == vmSymbols::use_unaligned_access_name()) {
4918       mirror->bool_field_put(fd->offset(), _use_unaligned_access);
4919     } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) {
4920       mirror->int_field_put(fd->offset(), _data_cache_line_flush_size);
4921     } else {
4922       assert(false, "unexpected UnsafeConstants field");
4923     }
4924   }
4925 };
4926 
4927 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() {
4928   UnsafeConstantsFixup fixup;
4929   vmClasses::UnsafeConstants_klass()->do_local_static_fields(&fixup);
4930 }
4931 
4932 
4933 // java_lang_StackTraceElement
4934 
4935 int java_lang_StackTraceElement::_methodName_offset;
4936 int java_lang_StackTraceElement::_fileName_offset;
4937 int java_lang_StackTraceElement::_lineNumber_offset;
4938 int java_lang_StackTraceElement::_moduleName_offset;
4939 int java_lang_StackTraceElement::_moduleVersion_offset;
4940 int java_lang_StackTraceElement::_classLoaderName_offset;
4941 int java_lang_StackTraceElement::_declaringClass_offset;
4942 int java_lang_StackTraceElement::_declaringClassObject_offset;
4943 
4944 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4945   macro(_declaringClassObject_offset,  k, "declaringClassObject", class_signature, false); \
4946   macro(_classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4947   macro(_moduleName_offset,      k, "moduleName",      string_signature, false); \
4948   macro(_moduleVersion_offset,   k, "moduleVersion",   string_signature, false); \
4949   macro(_declaringClass_offset,  k, "declaringClass",  string_signature, false); \
4950   macro(_methodName_offset,      k, "methodName",      string_signature, false); \
4951   macro(_fileName_offset,        k, "fileName",        string_signature, false); \
4952   macro(_lineNumber_offset,      k, "lineNumber",      int_signature,    false)
4953 
4954 // Support for java_lang_StackTraceElement
4955 void java_lang_StackTraceElement::compute_offsets() {
4956   InstanceKlass* k = vmClasses::StackTraceElement_klass();
4957   STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4958 }
4959 
4960 #if INCLUDE_CDS
4961 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
4962   STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4963 }
4964 #endif
4965 
4966 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
4967   element->obj_field_put(_fileName_offset, value);
4968 }
4969 
4970 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
4971   element->obj_field_put(_declaringClass_offset, value);
4972 }
4973 
4974 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
4975   element->obj_field_put(_methodName_offset, value);
4976 }
4977 
4978 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
4979   element->int_field_put(_lineNumber_offset, value);
4980 }
4981 
4982 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
4983   element->obj_field_put(_moduleName_offset, value);
4984 }
4985 
4986 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
4987   element->obj_field_put(_moduleVersion_offset, value);
4988 }
4989 
4990 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
4991   element->obj_field_put(_classLoaderName_offset, value);
4992 }
4993 
4994 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
4995   element->obj_field_put(_declaringClassObject_offset, value);
4996 }
4997 
4998 
4999 // java_lang_AssertionStatusDirectives
5000 
5001 int java_lang_AssertionStatusDirectives::_classes_offset;
5002 int java_lang_AssertionStatusDirectives::_classEnabled_offset;
5003 int java_lang_AssertionStatusDirectives::_packages_offset;
5004 int java_lang_AssertionStatusDirectives::_packageEnabled_offset;
5005 int java_lang_AssertionStatusDirectives::_deflt_offset;
5006 
5007 // Support for java Assertions - java_lang_AssertionStatusDirectives.
5008 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
5009   macro(_classes_offset,        k, "classes",        string_array_signature, false); \
5010   macro(_classEnabled_offset,   k, "classEnabled",   bool_array_signature, false); \
5011   macro(_packages_offset,       k, "packages",       string_array_signature, false); \
5012   macro(_packageEnabled_offset, k, "packageEnabled", bool_array_signature,   false); \
5013   macro(_deflt_offset,          k, "deflt",          bool_signature,         false)
5014 
5015 void java_lang_AssertionStatusDirectives::compute_offsets() {
5016   InstanceKlass* k = vmClasses::AssertionStatusDirectives_klass();
5017   ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5018 }
5019 
5020 #if INCLUDE_CDS
5021 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
5022   ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5023 }
5024 #endif
5025 
5026 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
5027   o->obj_field_put(_classes_offset, val);
5028 }
5029 
5030 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
5031   o->obj_field_put(_classEnabled_offset, val);
5032 }
5033 
5034 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
5035   o->obj_field_put(_packages_offset, val);
5036 }
5037 
5038 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
5039   o->obj_field_put(_packageEnabled_offset, val);
5040 }
5041 
5042 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
5043   o->bool_field_put(_deflt_offset, val);
5044 }
5045 
5046 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
5047 
5048 #define AOS_FIELDS_DO(macro) \
5049   macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
5050 
5051 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
5052   InstanceKlass* k = vmClasses::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
5053   AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5054 }
5055 
5056 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
5057   assert(_owner_offset != 0, "Must be initialized");
5058   return obj->obj_field(_owner_offset);
5059 }
5060 
5061 #if INCLUDE_CDS
5062 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
5063   AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5064 }
5065 #endif
5066 
5067 int vector_VectorPayload::_payload_offset;
5068 
5069 #define VECTORPAYLOAD_FIELDS_DO(macro) \
5070   macro(_payload_offset, k, "payload", object_signature, false)
5071 
5072 void vector_VectorPayload::compute_offsets() {
5073   InstanceKlass* k = vmClasses::vector_VectorPayload_klass();
5074   VECTORPAYLOAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5075 }
5076 
5077 #if INCLUDE_CDS
5078 void vector_VectorPayload::serialize_offsets(SerializeClosure* f) {
5079   VECTORPAYLOAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5080 }
5081 #endif
5082 
5083 void vector_VectorPayload::set_payload(oop o, oop val) {
5084   o->obj_field_put(_payload_offset, val);
5085 }
5086 
5087 bool vector_VectorPayload::is_instance(oop obj) {
5088   return obj != nullptr && is_subclass(obj->klass());
5089 }
5090 
5091 int java_lang_Integer_IntegerCache::_static_cache_offset;
5092 int java_lang_Long_LongCache::_static_cache_offset;
5093 int java_lang_Character_CharacterCache::_static_cache_offset;
5094 int java_lang_Short_ShortCache::_static_cache_offset;
5095 int java_lang_Byte_ByteCache::_static_cache_offset;
5096 
5097 #define INTEGER_CACHE_FIELDS_DO(macro) \
5098   macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true)
5099 
5100 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) {
5101   guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5102   INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5103 }
5104 
5105 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) {
5106   oop base = ik->static_field_base_raw();
5107   return objArrayOop(base->obj_field(_static_cache_offset));
5108 }
5109 
5110 Symbol* java_lang_Integer_IntegerCache::symbol() {
5111   return vmSymbols::java_lang_Integer_IntegerCache();
5112 }
5113 
5114 #if INCLUDE_CDS
5115 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) {
5116   INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5117 }
5118 #endif
5119 #undef INTEGER_CACHE_FIELDS_DO
5120 
5121 jint java_lang_Integer::value(oop obj) {
5122    jvalue v;
5123    java_lang_boxing_object::get_value(obj, &v);
5124    return v.i;
5125 }
5126 
5127 #define LONG_CACHE_FIELDS_DO(macro) \
5128   macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true)
5129 
5130 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) {
5131   guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5132   LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5133 }
5134 
5135 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) {
5136   oop base = ik->static_field_base_raw();
5137   return objArrayOop(base->obj_field(_static_cache_offset));
5138 }
5139 
5140 Symbol* java_lang_Long_LongCache::symbol() {
5141   return vmSymbols::java_lang_Long_LongCache();
5142 }
5143 
5144 #if INCLUDE_CDS
5145 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) {
5146   LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5147 }
5148 #endif
5149 #undef LONG_CACHE_FIELDS_DO
5150 
5151 jlong java_lang_Long::value(oop obj) {
5152    jvalue v;
5153    java_lang_boxing_object::get_value(obj, &v);
5154    return v.j;
5155 }
5156 
5157 #define CHARACTER_CACHE_FIELDS_DO(macro) \
5158   macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true)
5159 
5160 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) {
5161   guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5162   CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5163 }
5164 
5165 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) {
5166   oop base = ik->static_field_base_raw();
5167   return objArrayOop(base->obj_field(_static_cache_offset));
5168 }
5169 
5170 Symbol* java_lang_Character_CharacterCache::symbol() {
5171   return vmSymbols::java_lang_Character_CharacterCache();
5172 }
5173 
5174 #if INCLUDE_CDS
5175 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) {
5176   CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5177 }
5178 #endif
5179 #undef CHARACTER_CACHE_FIELDS_DO
5180 
5181 jchar java_lang_Character::value(oop obj) {
5182    jvalue v;
5183    java_lang_boxing_object::get_value(obj, &v);
5184    return v.c;
5185 }
5186 
5187 #define SHORT_CACHE_FIELDS_DO(macro) \
5188   macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true)
5189 
5190 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) {
5191   guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5192   SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5193 }
5194 
5195 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) {
5196   oop base = ik->static_field_base_raw();
5197   return objArrayOop(base->obj_field(_static_cache_offset));
5198 }
5199 
5200 Symbol* java_lang_Short_ShortCache::symbol() {
5201   return vmSymbols::java_lang_Short_ShortCache();
5202 }
5203 
5204 #if INCLUDE_CDS
5205 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) {
5206   SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5207 }
5208 #endif
5209 #undef SHORT_CACHE_FIELDS_DO
5210 
5211 jshort java_lang_Short::value(oop obj) {
5212    jvalue v;
5213    java_lang_boxing_object::get_value(obj, &v);
5214    return v.s;
5215 }
5216 
5217 #define BYTE_CACHE_FIELDS_DO(macro) \
5218   macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true)
5219 
5220 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) {
5221   guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5222   BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5223 }
5224 
5225 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) {
5226   oop base = ik->static_field_base_raw();
5227   return objArrayOop(base->obj_field(_static_cache_offset));
5228 }
5229 
5230 Symbol* java_lang_Byte_ByteCache::symbol() {
5231   return vmSymbols::java_lang_Byte_ByteCache();
5232 }
5233 
5234 #if INCLUDE_CDS
5235 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) {
5236   BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5237 }
5238 #endif
5239 #undef BYTE_CACHE_FIELDS_DO
5240 
5241 jbyte java_lang_Byte::value(oop obj) {
5242    jvalue v;
5243    java_lang_boxing_object::get_value(obj, &v);
5244    return v.b;
5245 }
5246 
5247 int java_lang_Boolean::_static_TRUE_offset;
5248 int java_lang_Boolean::_static_FALSE_offset;
5249 
5250 #define BOOLEAN_FIELDS_DO(macro) \
5251   macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \
5252   macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true)
5253 
5254 
5255 void java_lang_Boolean::compute_offsets(InstanceKlass *k) {
5256   guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5257   BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5258 }
5259 
5260 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) {
5261   oop base = ik->static_field_base_raw();
5262   return base->obj_field(_static_TRUE_offset);
5263 }
5264 
5265 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) {
5266   oop base = ik->static_field_base_raw();
5267   return base->obj_field(_static_FALSE_offset);
5268 }
5269 
5270 Symbol* java_lang_Boolean::symbol() {
5271   return vmSymbols::java_lang_Boolean();
5272 }
5273 
5274 #if INCLUDE_CDS
5275 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) {
5276   BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5277 }
5278 #endif
5279 #undef BOOLEAN_CACHE_FIELDS_DO
5280 
5281 jboolean java_lang_Boolean::value(oop obj) {
5282    jvalue v;
5283    java_lang_boxing_object::get_value(obj, &v);
5284    return v.z;
5285 }
5286 
5287 // java_lang_reflect_RecordComponent
5288 
5289 int java_lang_reflect_RecordComponent::_clazz_offset;
5290 int java_lang_reflect_RecordComponent::_name_offset;
5291 int java_lang_reflect_RecordComponent::_type_offset;
5292 int java_lang_reflect_RecordComponent::_accessor_offset;
5293 int java_lang_reflect_RecordComponent::_signature_offset;
5294 int java_lang_reflect_RecordComponent::_annotations_offset;
5295 int java_lang_reflect_RecordComponent::_typeAnnotations_offset;
5296 
5297 #define RECORDCOMPONENT_FIELDS_DO(macro) \
5298   macro(_clazz_offset,       k, "clazz",       class_signature,  false); \
5299   macro(_name_offset,        k, "name",        string_signature, false); \
5300   macro(_type_offset,        k, "type",        class_signature,  false); \
5301   macro(_accessor_offset,    k, "accessor",    reflect_method_signature, false); \
5302   macro(_signature_offset,   k, "signature",   string_signature, false); \
5303   macro(_annotations_offset, k, "annotations", byte_array_signature,     false); \
5304   macro(_typeAnnotations_offset, k, "typeAnnotations", byte_array_signature, false);
5305 
5306 // Support for java_lang_reflect_RecordComponent
5307 void java_lang_reflect_RecordComponent::compute_offsets() {
5308   InstanceKlass* k = vmClasses::RecordComponent_klass();
5309   RECORDCOMPONENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5310 }
5311 
5312 #if INCLUDE_CDS
5313 void java_lang_reflect_RecordComponent::serialize_offsets(SerializeClosure* f) {
5314   RECORDCOMPONENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5315 }
5316 #endif
5317 
5318 void java_lang_reflect_RecordComponent::set_clazz(oop element, oop value) {
5319   element->obj_field_put(_clazz_offset, value);
5320 }
5321 
5322 void java_lang_reflect_RecordComponent::set_name(oop element, oop value) {
5323   element->obj_field_put(_name_offset, value);
5324 }
5325 
5326 void java_lang_reflect_RecordComponent::set_type(oop element, oop value) {
5327   element->obj_field_put(_type_offset, value);
5328 }
5329 
5330 void java_lang_reflect_RecordComponent::set_accessor(oop element, oop value) {
5331   element->obj_field_put(_accessor_offset, value);
5332 }
5333 
5334 void java_lang_reflect_RecordComponent::set_signature(oop element, oop value) {
5335   element->obj_field_put(_signature_offset, value);
5336 }
5337 
5338 void java_lang_reflect_RecordComponent::set_annotations(oop element, oop value) {
5339   element->obj_field_put(_annotations_offset, value);
5340 }
5341 
5342 void java_lang_reflect_RecordComponent::set_typeAnnotations(oop element, oop value) {
5343   element->obj_field_put(_typeAnnotations_offset, value);
5344 }
5345 
5346 // java_lang_InternalError
5347 int java_lang_InternalError::_during_unsafe_access_offset;
5348 
5349 void java_lang_InternalError::set_during_unsafe_access(oop internal_error) {
5350   internal_error->bool_field_put(_during_unsafe_access_offset, true);
5351 }
5352 
5353 jboolean java_lang_InternalError::during_unsafe_access(oop internal_error) {
5354   return internal_error->bool_field(_during_unsafe_access_offset);
5355 }
5356 
5357 void java_lang_InternalError::compute_offsets() {
5358   INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
5359 }
5360 
5361 #if INCLUDE_CDS
5362 void java_lang_InternalError::serialize_offsets(SerializeClosure* f) {
5363   INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
5364 }
5365 #endif
5366 
5367 #define BASIC_JAVA_CLASSES_DO_PART1(f) \
5368   f(java_lang_Class) \
5369   f(java_lang_String) \
5370   f(java_lang_ref_Reference) \
5371   //end
5372 
5373 #define BASIC_JAVA_CLASSES_DO_PART2(f) \
5374   f(java_lang_System) \
5375   f(java_lang_ClassLoader) \
5376   f(java_lang_Throwable) \
5377   f(java_lang_Thread) \
5378   f(java_lang_Thread_FieldHolder) \
5379   f(java_lang_Thread_Constants) \
5380   f(java_lang_ThreadGroup) \
5381   f(java_lang_VirtualThread) \
5382   f(java_lang_InternalError) \
5383   f(java_lang_AssertionStatusDirectives) \
5384   f(java_lang_ref_SoftReference) \
5385   f(java_lang_invoke_MethodHandle) \
5386   f(java_lang_invoke_DirectMethodHandle) \
5387   f(java_lang_invoke_MemberName) \
5388   f(java_lang_invoke_ResolvedMethodName) \
5389   f(java_lang_invoke_LambdaForm) \
5390   f(java_lang_invoke_MethodType) \
5391   f(java_lang_invoke_CallSite) \
5392   f(java_lang_invoke_ConstantCallSite) \
5393   f(java_lang_reflect_AccessibleObject) \
5394   f(java_lang_reflect_Method) \
5395   f(java_lang_reflect_Constructor) \
5396   f(java_lang_reflect_Field) \
5397   f(java_lang_reflect_RecordComponent) \
5398   f(reflect_ConstantPool) \
5399   f(java_lang_reflect_Parameter) \
5400   f(java_lang_Module) \
5401   f(java_lang_StackTraceElement) \
5402   f(java_lang_ClassFrameInfo) \
5403   f(java_lang_StackFrameInfo) \
5404   f(java_lang_LiveStackFrameInfo) \
5405   f(jdk_internal_vm_ContinuationScope) \
5406   f(jdk_internal_vm_Continuation) \
5407   f(jdk_internal_vm_StackChunk) \
5408   f(java_util_concurrent_locks_AbstractOwnableSynchronizer) \
5409   f(jdk_internal_foreign_abi_NativeEntryPoint) \
5410   f(jdk_internal_foreign_abi_ABIDescriptor) \
5411   f(jdk_internal_foreign_abi_VMStorage) \
5412   f(jdk_internal_foreign_abi_CallConv) \
5413   f(jdk_internal_misc_UnsafeConstants) \
5414   f(java_lang_boxing_object) \
5415   f(vector_VectorPayload) \
5416   //end
5417 
5418 #define BASIC_JAVA_CLASSES_DO(f) \
5419         BASIC_JAVA_CLASSES_DO_PART1(f) \
5420         BASIC_JAVA_CLASSES_DO_PART2(f)
5421 
5422 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
5423 
5424 // Compute field offsets of all the classes in this file
5425 void JavaClasses::compute_offsets() {
5426   if (CDSConfig::is_using_archive()) {
5427     JVMTI_ONLY(assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
5428                                                          JvmtiExport::has_early_class_hook_env()),
5429                       "JavaClasses::compute_offsets() must be called in early JVMTI phase."));
5430     // None of the classes used by the rest of this function can be replaced by
5431     // JVMTI ClassFileLoadHook.
5432     // We are safe to use the archived offsets, which have already been restored
5433     // by JavaClasses::serialize_offsets, without computing the offsets again.
5434     return;
5435   }
5436 
5437   // We have already called the compute_offsets() of the
5438   // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String, java_lang_Class and
5439   // java_lang_ref_Reference) earlier inside vmClasses::resolve_all()
5440   BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
5441 }
5442 
5443 #if INCLUDE_CDS
5444 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
5445 
5446 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
5447   BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
5448 }
5449 #endif
5450 
5451 #if INCLUDE_CDS_JAVA_HEAP
5452 bool JavaClasses::is_supported_for_archiving(oop obj) {
5453   Klass* klass = obj->klass();
5454 
5455   if (!CDSConfig::is_dumping_invokedynamic()) {
5456     // These are supported by CDS only when CDSConfig::is_dumping_invokedynamic() is enabled.
5457     if (klass == vmClasses::ResolvedMethodName_klass() ||
5458         klass == vmClasses::MemberName_klass()) {
5459       return false;
5460     }
5461   }
5462 
5463   if (klass->is_subclass_of(vmClasses::Reference_klass())) {
5464     // It's problematic to archive Reference objects. One of the reasons is that
5465     // Reference::discovered may pull in unwanted objects (see JDK-8284336)
5466     return false;
5467   }
5468 
5469   return true;
5470 }
5471 #endif
5472 
5473 #ifndef PRODUCT
5474 
5475 // These functions exist to assert the validity of de-serialized offsets in boxing object as a sanity check.
5476 
5477 bool JavaClasses::check_offset(const char *klass_name, int deserialized_offset, const char *field_name,
5478                                const char* field_sig) {
5479   EXCEPTION_MARK;
5480   fieldDescriptor fd;
5481   TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name);
5482   Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
5483   InstanceKlass* ik = InstanceKlass::cast(k);
5484   TempNewSymbol f_name = SymbolTable::new_symbol(field_name);
5485   TempNewSymbol f_sig  = SymbolTable::new_symbol(field_sig);
5486   if (!ik->find_local_field(f_name, f_sig, &fd)) {
5487     tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
5488     return false;
5489   }
5490   if (fd.is_static()) {
5491     tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
5492     return false;
5493   }
5494   if (fd.offset() == deserialized_offset ) {
5495     return true;
5496   } else {
5497     tty->print_cr("Offset of nonstatic field %s.%s is deserialized as %d but should really be %d.",
5498                   klass_name, field_name, deserialized_offset, fd.offset());
5499     return false;
5500   }
5501 }
5502 
5503 void JavaClasses::check_offsets() {
5504   bool valid = true;
5505 
5506 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5507   valid &= check_offset(klass_name, cpp_klass_name :: _##field_name ## _offset, #field_name, field_sig)
5508 
5509 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5510   valid &= check_offset(klass_name, cpp_klass_name :: _##long_ ## field_name ## _offset, #field_name, field_sig)
5511 
5512   // Boxed primitive objects (java_lang_boxing_object)
5513 
5514   CHECK_OFFSET("java/lang/Boolean",   java_lang_boxing_object, value, "Z");
5515   CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
5516   CHECK_OFFSET("java/lang/Float",     java_lang_boxing_object, value, "F");
5517   CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
5518   CHECK_OFFSET("java/lang/Byte",      java_lang_boxing_object, value, "B");
5519   CHECK_OFFSET("java/lang/Short",     java_lang_boxing_object, value, "S");
5520   CHECK_OFFSET("java/lang/Integer",   java_lang_boxing_object, value, "I");
5521   CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
5522 
5523   if (!valid) vm_exit_during_initialization("Field offset verification failed");
5524 }
5525 
5526 #endif // PRODUCT
5527 
5528 int InjectedField::compute_offset() {
5529   InstanceKlass* ik = InstanceKlass::cast(klass());
5530   for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5531     if (!may_be_java && !fs.field_flags().is_injected()) {
5532       // Only look at injected fields
5533       continue;
5534     }
5535     if (fs.name() == name() && fs.signature() == signature()) {
5536       return fs.offset();
5537     }
5538   }
5539   ResourceMark rm;
5540   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)" : "");
5541 #ifndef PRODUCT
5542   ik->print();
5543   tty->print_cr("all fields:");
5544   for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5545     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());
5546   }
5547 #endif //PRODUCT
5548   vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
5549   return -1;
5550 }
5551 
5552 void javaClasses_init() {
5553   JavaClasses::compute_offsets();
5554   JavaClasses::check_offsets();
5555   FilteredFieldsMap::initialize();  // must be done after computing offsets.
5556 }