1 /*
   2  * Copyright (c) 1997, 2023, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "precompiled.hpp"
  26 #include "cds/archiveBuilder.hpp"
  27 #include "cds/archiveHeapLoader.hpp"
  28 #include "cds/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     char* expected = UNICODE::as_utf8(unicode, length);
 307     char* actual = as_utf8_string(h_obj());
 308     if (strcmp(expected, actual) != 0) {
 309       fatal("Unicode conversion failure: %s --> %s", expected, actual);
 310     }
 311   }
 312 #endif
 313 
 314   return h_obj;
 315 }
 316 
 317 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) {
 318   Handle h_obj = create_from_unicode(unicode, length, CHECK_NULL);
 319   return h_obj();
 320 }
 321 
 322 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
 323   if (utf8_str == nullptr) {
 324     return Handle();
 325   }
 326   bool has_multibyte, is_latin1;
 327   int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
 328   if (!CompactStrings) {
 329     has_multibyte = true;
 330     is_latin1 = false;
 331   }
 332 
 333   Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
 334   if (length > 0) {
 335     if (!has_multibyte) {
 336       const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
 337       ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
 338     } else if (is_latin1) {
 339       UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
 340     } else {
 341       UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
 342     }
 343   }
 344 
 345 #ifdef ASSERT
 346   // This check is too strict when the input string is not a valid UTF8.
 347   // For example, it may be created with arbitrary content via jni_NewStringUTF.
 348   if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, (int)strlen(utf8_str), false)) {
 349     ResourceMark rm;
 350     const char* expected = utf8_str;
 351     char* actual = as_utf8_string(h_obj());
 352     if (strcmp(expected, actual) != 0) {
 353       fatal("String conversion failure: %s --> %s", expected, actual);
 354     }
 355   }
 356 #endif
 357 
 358   return h_obj;
 359 }
 360 
 361 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
 362   Handle h_obj = create_from_str(utf8_str, CHECK_NULL);
 363   return h_obj();
 364 }
 365 
 366 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
 367   const char* utf8_str = (char*)symbol->bytes();
 368   int utf8_len = symbol->utf8_length();
 369 
 370   bool has_multibyte, is_latin1;
 371   int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
 372   if (!CompactStrings) {
 373     has_multibyte = true;
 374     is_latin1 = false;
 375   }
 376 
 377   Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
 378   if (length > 0) {
 379     if (!has_multibyte) {
 380       const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
 381       ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
 382     } else if (is_latin1) {
 383       UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
 384     } else {
 385       UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
 386     }
 387   }
 388 
 389 #ifdef ASSERT
 390   {
 391     ResourceMark rm;
 392     const char* expected = symbol->as_utf8();
 393     char* actual = as_utf8_string(h_obj());
 394     if (strncmp(expected, actual, utf8_len) != 0) {
 395       fatal("Symbol conversion failure: %s --> %s", expected, actual);
 396     }
 397   }
 398 #endif
 399 
 400   return h_obj;
 401 }
 402 
 403 // Converts a C string to a Java String based on current encoding
 404 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
 405   assert(str != nullptr, "bad arguments");
 406 
 407   typedef jstring (JNICALL *to_java_string_fn_t)(JNIEnv*, const char *);
 408   static to_java_string_fn_t _to_java_string_fn = nullptr;
 409 
 410   if (_to_java_string_fn == nullptr) {
 411     void *lib_handle = os::native_java_library();
 412     _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "JNU_NewStringPlatform"));
 413 #if defined(_WIN32) && !defined(_WIN64)
 414     if (_to_java_string_fn == nullptr) {
 415       // On 32 bit Windows, also try __stdcall decorated name
 416       _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "_JNU_NewStringPlatform@8"));
 417     }
 418 #endif
 419     if (_to_java_string_fn == nullptr) {
 420       fatal("JNU_NewStringPlatform missing");
 421     }
 422   }
 423 
 424   jstring js = nullptr;
 425   {
 426     JavaThread* thread = THREAD;
 427     HandleMark hm(thread);
 428     ThreadToNativeFromVM ttn(thread);
 429     js = (_to_java_string_fn)(thread->jni_environment(), str);
 430   }
 431 
 432   Handle native_platform_string(THREAD, JNIHandles::resolve(js));
 433   JNIHandles::destroy_local(js);  // destroy local JNIHandle.
 434   return native_platform_string;
 435 }
 436 
 437 // Converts a Java String to a native C string that can be used for
 438 // native OS calls.
 439 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
 440   typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
 441   static to_platform_string_fn_t _to_platform_string_fn = nullptr;
 442 
 443   if (_to_platform_string_fn == nullptr) {
 444     void *lib_handle = os::native_java_library();
 445     _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
 446     if (_to_platform_string_fn == nullptr) {
 447       fatal("GetStringPlatformChars missing");
 448     }
 449   }
 450 
 451   char *native_platform_string;
 452   jstring js;
 453   { JavaThread* thread = THREAD;
 454     js = (jstring) JNIHandles::make_local(thread, java_string());
 455     HandleMark hm(thread);
 456     ThreadToNativeFromVM ttn(thread);
 457     JNIEnv *env = thread->jni_environment();
 458     bool is_copy;
 459     native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
 460     assert(is_copy == JNI_TRUE, "is_copy value changed");
 461   }
 462 
 463   // Uses a store barrier and therefore needs to be in vm state
 464   JNIHandles::destroy_local(js);
 465 
 466   return native_platform_string;
 467 }
 468 
 469 Handle java_lang_String::externalize_classname(Symbol* java_name, TRAPS) {
 470   ResourceMark rm(THREAD);
 471   return create_from_str(java_name->as_klass_external_name(), THREAD);
 472 }
 473 
 474 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
 475   jchar* result = as_unicode_string_or_null(java_string, length);
 476   if (result == nullptr) {
 477     THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
 478   }
 479   return result;
 480 }
 481 
 482 jchar* java_lang_String::as_unicode_string_or_null(oop java_string, int& length) {
 483   typeArrayOop value  = java_lang_String::value(java_string);
 484                length = java_lang_String::length(java_string, value);
 485   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 486 
 487   jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
 488   if (result != nullptr) {
 489     if (!is_latin1) {
 490       for (int index = 0; index < length; index++) {
 491         result[index] = value->char_at(index);
 492       }
 493     } else {
 494       for (int index = 0; index < length; index++) {
 495         result[index] = ((jchar) value->byte_at(index)) & 0xff;
 496       }
 497     }
 498   }
 499   return result;
 500 }
 501 
 502 inline unsigned int java_lang_String::hash_code_impl(oop java_string, bool update) {
 503   // The hash and hashIsZero fields are subject to a benign data race,
 504   // making it crucial to ensure that any observable result of the
 505   // calculation in this method stays correct under any possible read of
 506   // these fields. Necessary restrictions to allow this to be correct
 507   // without explicit memory fences or similar concurrency primitives is
 508   // that we can ever only write to one of these two fields for a given
 509   // String instance, and that the computation is idempotent and derived
 510   // from immutable state
 511   assert(_initialized && (_hash_offset > 0) && (_hashIsZero_offset > 0), "Must be initialized");
 512   if (java_lang_String::hash_is_set(java_string)) {
 513     return java_string->int_field(_hash_offset);
 514   }
 515 
 516   typeArrayOop value = java_lang_String::value(java_string);
 517   int         length = java_lang_String::length(java_string, value);
 518   bool     is_latin1 = java_lang_String::is_latin1(java_string);
 519 
 520   unsigned int hash = 0;
 521   if (length > 0) {
 522     if (is_latin1) {
 523       hash = java_lang_String::hash_code(value->byte_at_addr(0), length);
 524     } else {
 525       hash = java_lang_String::hash_code(value->char_at_addr(0), length);
 526     }
 527   }
 528 
 529   if (update) {
 530     if (hash != 0) {
 531       java_string->int_field_put(_hash_offset, hash);
 532     } else {
 533       java_string->bool_field_put(_hashIsZero_offset, true);
 534     }
 535   }
 536   return hash;
 537 }
 538 
 539 unsigned int java_lang_String::hash_code(oop java_string) {
 540   return hash_code_impl(java_string, /*update=*/true);
 541 }
 542 
 543 unsigned int java_lang_String::hash_code_noupdate(oop java_string) {
 544   return hash_code_impl(java_string, /*update=*/false);
 545 }
 546 
 547 
 548 char* java_lang_String::as_quoted_ascii(oop java_string) {
 549   typeArrayOop value  = java_lang_String::value(java_string);
 550   int          length = java_lang_String::length(java_string, value);
 551   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 552 
 553   if (length == 0) return nullptr;
 554 
 555   char* result;
 556   int result_length;
 557   if (!is_latin1) {
 558     jchar* base = value->char_at_addr(0);
 559     result_length = UNICODE::quoted_ascii_length(base, length) + 1;
 560     result = NEW_RESOURCE_ARRAY(char, result_length);
 561     UNICODE::as_quoted_ascii(base, length, result, result_length);
 562   } else {
 563     jbyte* base = value->byte_at_addr(0);
 564     result_length = UNICODE::quoted_ascii_length(base, length) + 1;
 565     result = NEW_RESOURCE_ARRAY(char, result_length);
 566     UNICODE::as_quoted_ascii(base, length, result, result_length);
 567   }
 568   assert(result_length >= length + 1, "must not be shorter");
 569   assert(result_length == (int)strlen(result) + 1, "must match");
 570   return result;
 571 }
 572 
 573 Symbol* java_lang_String::as_symbol(oop java_string) {
 574   typeArrayOop value  = java_lang_String::value(java_string);
 575   int          length = java_lang_String::length(java_string, value);
 576   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 577   if (!is_latin1) {
 578     jchar* base = (length == 0) ? nullptr : value->char_at_addr(0);
 579     Symbol* sym = SymbolTable::new_symbol(base, length);
 580     return sym;
 581   } else {
 582     ResourceMark rm;
 583     jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
 584     const char* base = UNICODE::as_utf8(position, length);
 585     Symbol* sym = SymbolTable::new_symbol(base, length);
 586     return sym;
 587   }
 588 }
 589 
 590 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
 591   typeArrayOop value  = java_lang_String::value(java_string);
 592   int          length = java_lang_String::length(java_string, value);
 593   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 594   if (!is_latin1) {
 595     jchar* base = (length == 0) ? nullptr : value->char_at_addr(0);
 596     return SymbolTable::probe_unicode(base, length);
 597   } else {
 598     ResourceMark rm;
 599     jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
 600     const char* base = UNICODE::as_utf8(position, length);
 601     return SymbolTable::probe(base, length);
 602   }
 603 }
 604 
 605 int java_lang_String::utf8_length(oop java_string, typeArrayOop value) {
 606   assert(value_equals(value, java_lang_String::value(java_string)),
 607          "value must be same as java_lang_String::value(java_string)");
 608   int length = java_lang_String::length(java_string, value);
 609   if (length == 0) {
 610     return 0;
 611   }
 612   if (!java_lang_String::is_latin1(java_string)) {
 613     return UNICODE::utf8_length(value->char_at_addr(0), length);
 614   } else {
 615     return UNICODE::utf8_length(value->byte_at_addr(0), length);
 616   }
 617 }
 618 
 619 int java_lang_String::utf8_length(oop java_string) {
 620   typeArrayOop value = java_lang_String::value(java_string);
 621   return utf8_length(java_string, value);
 622 }
 623 
 624 char* java_lang_String::as_utf8_string(oop java_string) {
 625   int length;
 626   return as_utf8_string(java_string, length);
 627 }
 628 
 629 char* java_lang_String::as_utf8_string(oop java_string, int& length) {
 630   typeArrayOop value = java_lang_String::value(java_string);
 631   length             = java_lang_String::length(java_string, value);
 632   bool     is_latin1 = java_lang_String::is_latin1(java_string);
 633   if (!is_latin1) {
 634     jchar* position = (length == 0) ? nullptr : value->char_at_addr(0);
 635     return UNICODE::as_utf8(position, length);
 636   } else {
 637     jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
 638     return UNICODE::as_utf8(position, length);
 639   }
 640 }
 641 
 642 // Uses a provided buffer if it's sufficiently large, otherwise allocates
 643 // a resource array to fit
 644 char* java_lang_String::as_utf8_string_full(oop java_string, char* buf, int buflen, int& utf8_len) {
 645   typeArrayOop value = java_lang_String::value(java_string);
 646   int            len = java_lang_String::length(java_string, value);
 647   bool     is_latin1 = java_lang_String::is_latin1(java_string);
 648   if (!is_latin1) {
 649     jchar *position = (len == 0) ? nullptr : value->char_at_addr(0);
 650     utf8_len = UNICODE::utf8_length(position, len);
 651     if (utf8_len >= buflen) {
 652       buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
 653     }
 654     return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
 655   } else {
 656     jbyte *position = (len == 0) ? nullptr : value->byte_at_addr(0);
 657     utf8_len = UNICODE::utf8_length(position, len);
 658     if (utf8_len >= buflen) {
 659       buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
 660     }
 661     return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
 662   }
 663 }
 664 
 665 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, int buflen) {
 666   assert(value_equals(value, java_lang_String::value(java_string)),
 667          "value must be same as java_lang_String::value(java_string)");
 668   int     length = java_lang_String::length(java_string, value);
 669   bool is_latin1 = java_lang_String::is_latin1(java_string);
 670   if (!is_latin1) {
 671     jchar* position = (length == 0) ? nullptr : value->char_at_addr(0);
 672     return UNICODE::as_utf8(position, length, buf, buflen);
 673   } else {
 674     jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
 675     return UNICODE::as_utf8(position, length, buf, buflen);
 676   }
 677 }
 678 
 679 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
 680   typeArrayOop value = java_lang_String::value(java_string);
 681   return as_utf8_string(java_string, value, buf, buflen);
 682 }
 683 
 684 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
 685   typeArrayOop value  = java_lang_String::value(java_string);
 686   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 687   assert(start + len <= java_lang_String::length(java_string), "just checking");
 688   if (!is_latin1) {
 689     jchar* position = value->char_at_addr(start);
 690     return UNICODE::as_utf8(position, len);
 691   } else {
 692     jbyte* position = value->byte_at_addr(start);
 693     return UNICODE::as_utf8(position, len);
 694   }
 695 }
 696 
 697 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, int buflen) {
 698   assert(value_equals(value, java_lang_String::value(java_string)),
 699          "value must be same as java_lang_String::value(java_string)");
 700   assert(start + len <= java_lang_String::length(java_string), "just checking");
 701   bool is_latin1 = java_lang_String::is_latin1(java_string);
 702   if (!is_latin1) {
 703     jchar* position = value->char_at_addr(start);
 704     return UNICODE::as_utf8(position, len, buf, buflen);
 705   } else {
 706     jbyte* position = value->byte_at_addr(start);
 707     return UNICODE::as_utf8(position, len, buf, buflen);
 708   }
 709 }
 710 
 711 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) {
 712   assert(java_string->klass() == vmClasses::String_klass(),
 713          "must be java_string");
 714   typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
 715   int length = java_lang_String::length(java_string, value);
 716   if (length != len) {
 717     return false;
 718   }
 719   bool is_latin1 = java_lang_String::is_latin1(java_string);
 720   if (!is_latin1) {
 721     for (int i = 0; i < len; i++) {
 722       if (value->char_at(i) != chars[i]) {
 723         return false;
 724       }
 725     }
 726   } else {
 727     for (int i = 0; i < len; i++) {
 728       if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
 729         return false;
 730       }
 731     }
 732   }
 733   return true;
 734 }
 735 
 736 bool java_lang_String::equals(oop str1, oop str2) {
 737   assert(str1->klass() == vmClasses::String_klass(),
 738          "must be java String");
 739   assert(str2->klass() == vmClasses::String_klass(),
 740          "must be java String");
 741   typeArrayOop value1    = java_lang_String::value_no_keepalive(str1);
 742   bool         is_latin1 = java_lang_String::is_latin1(str1);
 743   typeArrayOop value2    = java_lang_String::value_no_keepalive(str2);
 744   bool         is_latin2 = java_lang_String::is_latin1(str2);
 745 
 746   if (is_latin1 != is_latin2) {
 747     // Strings with different coders are never equal.
 748     return false;
 749   }
 750   return value_equals(value1, value2);
 751 }
 752 
 753 void java_lang_String::print(oop java_string, outputStream* st) {
 754   assert(java_string->klass() == vmClasses::String_klass(), "must be java_string");
 755   typeArrayOop value  = java_lang_String::value_no_keepalive(java_string);
 756 
 757   if (value == nullptr) {
 758     // This can happen if, e.g., printing a String
 759     // object before its initializer has been called
 760     st->print("nullptr");
 761     return;
 762   }
 763 
 764   int length = java_lang_String::length(java_string, value);
 765   bool is_latin1 = java_lang_String::is_latin1(java_string);
 766 
 767   st->print("\"");
 768   for (int index = 0; index < length; index++) {
 769     jchar c = (!is_latin1) ?  value->char_at(index) :
 770                              ((jchar) value->byte_at(index)) & 0xff;
 771     if (c < ' ') {
 772       st->print("\\x%02X", c); // print control characters e.g. \x0A
 773     } else {
 774       st->print("%c", c);
 775     }
 776   }
 777   st->print("\"");
 778 }
 779 
 780 // java_lang_Class
 781 
 782 int java_lang_Class::_klass_offset;
 783 int java_lang_Class::_array_klass_offset;
 784 int java_lang_Class::_oop_size_offset;
 785 int java_lang_Class::_static_oop_field_count_offset;
 786 int java_lang_Class::_class_loader_offset;
 787 int java_lang_Class::_module_offset;
 788 int java_lang_Class::_protection_domain_offset;
 789 int java_lang_Class::_component_mirror_offset;
 790 int java_lang_Class::_signers_offset;
 791 int java_lang_Class::_name_offset;
 792 int java_lang_Class::_source_file_offset;
 793 int java_lang_Class::_classData_offset;
 794 int java_lang_Class::_classRedefinedCount_offset;
 795 
 796 bool java_lang_Class::_offsets_computed = false;
 797 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = nullptr;
 798 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = nullptr;
 799 
 800 #ifdef ASSERT
 801 inline static void assert_valid_static_string_field(fieldDescriptor* fd) {
 802   assert(fd->has_initial_value(), "caller should have checked this");
 803   assert(fd->field_type() == T_OBJECT, "caller should have checked this");
 804   // Can't use vmSymbols::string_signature() as fd->signature() may have been relocated
 805   // during DumpSharedSpaces
 806   assert(fd->signature()->equals("Ljava/lang/String;"), "just checking");
 807 }
 808 #endif
 809 
 810 static void initialize_static_string_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
 811   DEBUG_ONLY(assert_valid_static_string_field(fd);)
 812   oop string = fd->string_initial_value(CHECK);
 813   mirror()->obj_field_put(fd->offset(), string);
 814 }
 815 
 816 static void initialize_static_primitive_field(fieldDescriptor* fd, Handle mirror) {
 817   assert(fd->has_initial_value(), "caller should have checked this");
 818   BasicType t = fd->field_type();
 819   switch (t) {
 820   case T_BYTE:
 821     mirror()->byte_field_put(fd->offset(), (jbyte)(fd->int_initial_value()));
 822     break;
 823   case T_BOOLEAN:
 824     mirror()->bool_field_put(fd->offset(), (jboolean)(fd->int_initial_value()));
 825     break;
 826   case T_CHAR:
 827     mirror()->char_field_put(fd->offset(), (jchar)(fd->int_initial_value()));
 828     break;
 829   case T_SHORT:
 830     mirror()->short_field_put(fd->offset(), (jshort)(fd->int_initial_value()));
 831     break;
 832   case T_INT:
 833     mirror()->int_field_put(fd->offset(), fd->int_initial_value());
 834     break;
 835   case T_FLOAT:
 836     mirror()->float_field_put(fd->offset(), fd->float_initial_value());
 837     break;
 838   case T_DOUBLE:
 839     mirror()->double_field_put(fd->offset(), fd->double_initial_value());
 840     break;
 841   case T_LONG:
 842     mirror()->long_field_put(fd->offset(), fd->long_initial_value());
 843     break;
 844   default:
 845     // Illegal ConstantValue attribute in class file should have been
 846     // caught during classfile parsing.
 847     ShouldNotReachHere();
 848   }
 849 }
 850 
 851 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
 852   assert(mirror.not_null() && fd->is_static(), "just checking");
 853   if (fd->has_initial_value()) {
 854     if (fd->field_type() != T_OBJECT) {
 855       initialize_static_primitive_field(fd, mirror);
 856     } else {
 857       initialize_static_string_field(fd, mirror, CHECK);
 858     }
 859   }
 860 }
 861 
 862 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
 863   assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
 864 
 865   // If the offset was read from the shared archive, it was fixed up already
 866   if (!k->is_shared()) {
 867     if (k->is_instance_klass()) {
 868       // During bootstrap, java.lang.Class wasn't loaded so static field
 869       // offsets were computed without the size added it.  Go back and
 870       // update all the static field offsets to included the size.
 871 
 872       // Unfortunately, the FieldInfo stream is encoded with UNSIGNED5 which doesn't allow
 873       // content updates. So the FieldInfo stream has to be decompressed into a temporary array,
 874       // static fields offsets are updated in this array before reencoding everything into
 875       // a new UNSIGNED5 stream, and substitute it to the old FieldInfo stream.
 876 
 877       int java_fields;
 878       int injected_fields;
 879       InstanceKlass* ik = InstanceKlass::cast(k);
 880       GrowableArray<FieldInfo>* fields =
 881         FieldInfoStream::create_FieldInfoArray(ik->fieldinfo_stream(),
 882                                                &java_fields, &injected_fields);
 883       for (int i = 0; i < fields->length(); i++) {
 884         FieldInfo* fi = fields->adr_at(i);
 885         if (fi->access_flags().is_static()) {
 886           fi->set_offset(fi->offset() + InstanceMirrorKlass::offset_of_static_fields());
 887         }
 888       }
 889       Array<u1>* old_stream = ik->fieldinfo_stream();
 890       assert(fields->length() == (java_fields + injected_fields), "Must be");
 891       Array<u1>* new_fis = FieldInfoStream::create_FieldInfoStream(fields, java_fields, injected_fields, k->class_loader_data(), CHECK);
 892       ik->set_fieldinfo_stream(new_fis);
 893       MetadataFactory::free_array<u1>(k->class_loader_data(), old_stream);
 894     }
 895   }
 896 
 897   if (k->is_shared() && k->has_archived_mirror_index()) {
 898     if (ArchiveHeapLoader::is_in_use()) {
 899       bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK);
 900       assert(present, "Missing archived mirror for %s", k->external_name());
 901       return;
 902     } else {
 903       k->clear_java_mirror_handle();
 904       k->clear_archived_mirror_index();
 905     }
 906   }
 907   create_mirror(k, Handle(), Handle(), Handle(), Handle(), CHECK);
 908 }
 909 
 910 void java_lang_Class::initialize_mirror_fields(Klass* k,
 911                                                Handle mirror,
 912                                                Handle protection_domain,
 913                                                Handle classData,
 914                                                TRAPS) {
 915   // Set protection domain also
 916   set_protection_domain(mirror(), protection_domain());
 917 
 918   // Initialize static fields
 919   InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK);
 920 
 921  // Set classData
 922   set_class_data(mirror(), classData());
 923 }
 924 
 925 // Set the java.lang.Module module field in the java_lang_Class mirror
 926 void java_lang_Class::set_mirror_module_field(JavaThread* current, Klass* k, Handle mirror, Handle module) {
 927   if (module.is_null()) {
 928     // During startup, the module may be null only if java.base has not been defined yet.
 929     // Put the class on the fixup_module_list to patch later when the java.lang.Module
 930     // for java.base is known. But note that since we captured the null module another
 931     // thread may have completed that initialization.
 932 
 933     bool javabase_was_defined = false;
 934     {
 935       MutexLocker m1(current, Module_lock);
 936       // Keep list of classes needing java.base module fixup
 937       if (!ModuleEntryTable::javabase_defined()) {
 938         assert(k->java_mirror() != nullptr, "Class's mirror is null");
 939         k->class_loader_data()->inc_keep_alive();
 940         assert(fixup_module_field_list() != nullptr, "fixup_module_field_list not initialized");
 941         fixup_module_field_list()->push(k);
 942       } else {
 943         javabase_was_defined = true;
 944       }
 945     }
 946 
 947     // If java.base was already defined then patch this particular class with java.base.
 948     if (javabase_was_defined) {
 949       ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
 950       assert(javabase_entry != nullptr && javabase_entry->module() != nullptr,
 951              "Setting class module field, " JAVA_BASE_NAME " should be defined");
 952       Handle javabase_handle(current, javabase_entry->module());
 953       set_module(mirror(), javabase_handle());
 954     }
 955   } else {
 956     assert(Universe::is_module_initialized() ||
 957            (ModuleEntryTable::javabase_defined() &&
 958             (module() == ModuleEntryTable::javabase_moduleEntry()->module())),
 959            "Incorrect java.lang.Module specification while creating mirror");
 960     set_module(mirror(), module());
 961   }
 962 }
 963 
 964 // Statically allocate fixup lists because they always get created.
 965 void java_lang_Class::allocate_fixup_lists() {
 966   GrowableArray<Klass*>* mirror_list =
 967     new (mtClass) GrowableArray<Klass*>(40, mtClass);
 968   set_fixup_mirror_list(mirror_list);
 969 
 970   GrowableArray<Klass*>* module_list =
 971     new (mtModule) GrowableArray<Klass*>(500, mtModule);
 972   set_fixup_module_field_list(module_list);
 973 }
 974 
 975 void java_lang_Class::allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData,
 976                                       Handle& mirror, Handle& comp_mirror, TRAPS) {
 977   // Allocate mirror (java.lang.Class instance)
 978   oop mirror_oop = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(k, CHECK);
 979   mirror = Handle(THREAD, mirror_oop);
 980 
 981   // Setup indirection from mirror->klass
 982   set_klass(mirror(), k);
 983 
 984   InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
 985   assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
 986 
 987   set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
 988 
 989   // It might also have a component mirror.  This mirror must already exist.
 990   if (k->is_array_klass()) {
 991     if (k->is_typeArray_klass()) {
 992       BasicType type = TypeArrayKlass::cast(k)->element_type();
 993       if (is_scratch) {
 994         comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(type));
 995       } else {
 996         comp_mirror = Handle(THREAD, Universe::java_mirror(type));
 997       }
 998     } else {
 999       assert(k->is_objArray_klass(), "Must be");
1000       Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1001       assert(element_klass != nullptr, "Must have an element klass");
1002       if (is_scratch) {
1003         comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass));
1004       } else {
1005         comp_mirror = Handle(THREAD, element_klass->java_mirror());
1006       }
1007     }
1008     assert(comp_mirror() != nullptr, "must have a mirror");
1009 
1010     // Two-way link between the array klass and its component mirror:
1011     // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
1012     set_component_mirror(mirror(), comp_mirror());
1013     // See below for ordering dependencies between field array_klass in component mirror
1014     // and java_mirror in this klass.
1015   } else {
1016     assert(k->is_instance_klass(), "Must be");
1017 
1018     initialize_mirror_fields(k, mirror, protection_domain, classData, THREAD);
1019     if (HAS_PENDING_EXCEPTION) {
1020       // If any of the fields throws an exception like OOM remove the klass field
1021       // from the mirror so GC doesn't follow it after the klass has been deallocated.
1022       // This mirror looks like a primitive type, which logically it is because it
1023       // it represents no class.
1024       set_klass(mirror(), nullptr);
1025       return;
1026     }
1027   }
1028 }
1029 
1030 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
1031                                     Handle module, Handle protection_domain,
1032                                     Handle classData, TRAPS) {
1033   assert(k != nullptr, "Use create_basic_type_mirror for primitive types");
1034   assert(k->java_mirror() == nullptr, "should only assign mirror once");
1035 
1036   // Use this moment of initialization to cache modifier_flags also,
1037   // to support Class.getModifiers().  Instance classes recalculate
1038   // the cached flags after the class file is parsed, but before the
1039   // class is put into the system dictionary.
1040   int computed_modifiers = k->compute_modifier_flags();
1041   k->set_modifier_flags(computed_modifiers);
1042   // Class_klass has to be loaded because it is used to allocate
1043   // the mirror.
1044   if (vmClasses::Class_klass_loaded()) {
1045     Handle mirror;
1046     Handle comp_mirror;
1047 
1048     allocate_mirror(k, /*is_scratch=*/false, protection_domain, classData, mirror, comp_mirror, CHECK);
1049 
1050     // set the classLoader field in the java_lang_Class instance
1051     assert(class_loader() == k->class_loader(), "should be same");
1052     set_class_loader(mirror(), class_loader());
1053 
1054     // Setup indirection from klass->mirror
1055     // after any exceptions can happen during allocations.
1056     k->set_java_mirror(mirror);
1057 
1058     // Set the module field in the java_lang_Class instance.  This must be done
1059     // after the mirror is set.
1060     set_mirror_module_field(THREAD, k, mirror, module);
1061 
1062     if (comp_mirror() != nullptr) {
1063       // Set after k->java_mirror() is published, because compiled code running
1064       // concurrently doesn't expect a k to have a null java_mirror.
1065       release_set_array_klass(comp_mirror(), k);
1066     }
1067     if (DumpSharedSpaces) {
1068       create_scratch_mirror(k, CHECK);
1069     }
1070   } else {
1071     assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1072     fixup_mirror_list()->push(k);
1073   }
1074 }
1075 
1076 #if INCLUDE_CDS_JAVA_HEAP
1077 // The "scratch mirror" stores the states of the mirror object that can be
1078 // decided at dump time (such as the initial values of the static fields, the
1079 // component mirror, etc). At runtime, more information is added to it by
1080 // java_lang_Class::restore_archived_mirror().
1081 //
1082 // Essentially, /*dumptime*/create_scratch_mirror() + /*runtime*/restore_archived_mirror()
1083 // produces the same result as /*runtime*/create_mirror().
1084 //
1085 // Note: we archive the "scratch mirror" instead of k->java_mirror(), because the
1086 // latter may contain dumptime-specific information that cannot be archived
1087 // (e.g., ClassLoaderData*, or static fields that are modified by Java code execution).
1088 void java_lang_Class::create_scratch_mirror(Klass* k, TRAPS) {
1089   if (k->class_loader() != nullptr &&
1090       k->class_loader() != SystemDictionary::java_platform_loader() &&
1091       k->class_loader() != SystemDictionary::java_system_loader()) {
1092     // We only archive the mirrors of classes loaded by the built-in loaders
1093     return;
1094   }
1095 
1096   Handle protection_domain, classData; // set to null. Will be reinitialized at runtime
1097   Handle mirror;
1098   Handle comp_mirror;
1099   allocate_mirror(k, /*is_scratch=*/true, protection_domain, classData, mirror, comp_mirror, CHECK);
1100 
1101   if (comp_mirror() != nullptr) {
1102     release_set_array_klass(comp_mirror(), k);
1103   }
1104 
1105   HeapShared::set_scratch_java_mirror(k, mirror());
1106 }
1107 
1108 // Returns true if the mirror is updated, false if no archived mirror
1109 // data is present. After the archived mirror object is restored, the
1110 // shared klass' _has_raw_archived_mirror flag is cleared.
1111 bool java_lang_Class::restore_archived_mirror(Klass *k,
1112                                               Handle class_loader, Handle module,
1113                                               Handle protection_domain, TRAPS) {
1114   // Postpone restoring archived mirror until java.lang.Class is loaded. Please
1115   // see more details in vmClasses::resolve_all().
1116   if (!vmClasses::Class_klass_loaded()) {
1117     assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1118     fixup_mirror_list()->push(k);
1119     return true;
1120   }
1121 
1122   oop m = k->archived_java_mirror();
1123   assert(m != nullptr, "must have stored non-null archived mirror");
1124 
1125   // Sanity: clear it now to prevent re-initialization if any of the following fails
1126   k->clear_archived_mirror_index();
1127 
1128   // mirror is archived, restore
1129   log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1130   assert(as_Klass(m) == k, "must be");
1131   Handle mirror(THREAD, m);
1132 
1133   if (!k->is_array_klass()) {
1134     // - local static final fields with initial values were initialized at dump time
1135 
1136     if (protection_domain.not_null()) {
1137       set_protection_domain(mirror(), protection_domain());
1138     }
1139   }
1140 
1141   assert(class_loader() == k->class_loader(), "should be same");
1142   if (class_loader.not_null()) {
1143     set_class_loader(mirror(), class_loader());
1144   }
1145 
1146   k->set_java_mirror(mirror);
1147 
1148   set_mirror_module_field(THREAD, k, mirror, module);
1149 
1150   if (log_is_enabled(Trace, cds, heap, mirror)) {
1151     ResourceMark rm(THREAD);
1152     log_trace(cds, heap, mirror)(
1153         "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1154   }
1155 
1156   return true;
1157 }
1158 #endif // INCLUDE_CDS_JAVA_HEAP
1159 
1160 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1161   assert(_module_offset != 0, "must have been computed already");
1162   set_module(k->java_mirror(), module());
1163 }
1164 
1165 void java_lang_Class::set_oop_size(HeapWord* java_class, size_t size) {
1166   assert(_oop_size_offset != 0, "must be set");
1167   assert(size > 0, "Oop size must be greater than zero, not " SIZE_FORMAT, size);
1168   assert(size <= INT_MAX, "Lossy conversion: " SIZE_FORMAT, size);
1169   *(int*)(((char*)java_class) + _oop_size_offset) = (int)size;
1170 }
1171 
1172 int  java_lang_Class::static_oop_field_count(oop java_class) {
1173   assert(_static_oop_field_count_offset != 0, "must be set");
1174   return java_class->int_field(_static_oop_field_count_offset);
1175 }
1176 
1177 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1178   assert(_static_oop_field_count_offset != 0, "must be set");
1179   java_class->int_field_put(_static_oop_field_count_offset, size);
1180 }
1181 
1182 oop java_lang_Class::protection_domain(oop java_class) {
1183   assert(_protection_domain_offset != 0, "must be set");
1184   return java_class->obj_field(_protection_domain_offset);
1185 }
1186 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1187   assert(_protection_domain_offset != 0, "must be set");
1188   java_class->obj_field_put(_protection_domain_offset, pd);
1189 }
1190 
1191 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1192   assert(_component_mirror_offset != 0, "must be set");
1193     java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1194   }
1195 oop java_lang_Class::component_mirror(oop java_class) {
1196   assert(_component_mirror_offset != 0, "must be set");
1197   return java_class->obj_field(_component_mirror_offset);
1198 }
1199 
1200 objArrayOop java_lang_Class::signers(oop java_class) {
1201   assert(_signers_offset != 0, "must be set");
1202   return (objArrayOop)java_class->obj_field(_signers_offset);
1203 }
1204 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
1205   assert(_signers_offset != 0, "must be set");
1206   java_class->obj_field_put(_signers_offset, signers);
1207 }
1208 
1209 oop java_lang_Class::class_data(oop java_class) {
1210   assert(_classData_offset != 0, "must be set");
1211   return java_class->obj_field(_classData_offset);
1212 }
1213 void java_lang_Class::set_class_data(oop java_class, oop class_data) {
1214   assert(_classData_offset != 0, "must be set");
1215   java_class->obj_field_put(_classData_offset, class_data);
1216 }
1217 
1218 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1219   assert(_class_loader_offset != 0, "offsets should have been initialized");
1220   java_class->obj_field_put(_class_loader_offset, loader);
1221 }
1222 
1223 oop java_lang_Class::class_loader(oop java_class) {
1224   assert(_class_loader_offset != 0, "must be set");
1225   return java_class->obj_field(_class_loader_offset);
1226 }
1227 
1228 oop java_lang_Class::module(oop java_class) {
1229   assert(_module_offset != 0, "must be set");
1230   return java_class->obj_field(_module_offset);
1231 }
1232 
1233 void java_lang_Class::set_module(oop java_class, oop module) {
1234   assert(_module_offset != 0, "must be set");
1235   java_class->obj_field_put(_module_offset, module);
1236 }
1237 
1238 oop java_lang_Class::name(Handle java_class, TRAPS) {
1239   assert(_name_offset != 0, "must be set");
1240   oop o = java_class->obj_field(_name_offset);
1241   if (o == nullptr) {
1242     o = StringTable::intern(as_external_name(java_class()), THREAD);
1243     java_class->obj_field_put(_name_offset, o);
1244   }
1245   return o;
1246 }
1247 
1248 oop java_lang_Class::source_file(oop java_class) {
1249   assert(_source_file_offset != 0, "must be set");
1250   return java_class->obj_field(_source_file_offset);
1251 }
1252 
1253 void java_lang_Class::set_source_file(oop java_class, oop source_file) {
1254   assert(_source_file_offset != 0, "must be set");
1255   java_class->obj_field_put(_source_file_offset, source_file);
1256 }
1257 
1258 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1259   // This should be improved by adding a field at the Java level or by
1260   // introducing a new VM klass (see comment in ClassFileParser)
1261   oop java_class = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(nullptr, CHECK_NULL);
1262   if (type != T_VOID) {
1263     Klass* aklass = Universe::typeArrayKlassObj(type);
1264     assert(aklass != nullptr, "correct bootstrap");
1265     release_set_array_klass(java_class, aklass);
1266   }
1267 #ifdef ASSERT
1268   InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(vmClasses::Class_klass());
1269   assert(static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1270 #endif
1271   return java_class;
1272 }
1273 
1274 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1275   assert(is_instance(java_class), "must be a Class object");
1276   java_class->metadata_field_put(_klass_offset, klass);
1277 }
1278 
1279 
1280 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1281   assert(is_instance(java_class), "must be a Class object");
1282   Symbol* name = nullptr;
1283   bool is_instance = false;
1284   if (is_primitive(java_class)) {
1285     name = vmSymbols::type_signature(primitive_type(java_class));
1286   } else {
1287     Klass* k = as_Klass(java_class);
1288     is_instance = k->is_instance_klass();
1289     name = k->name();
1290   }
1291   if (name == nullptr) {
1292     st->print("<null>");
1293     return;
1294   }
1295   if (is_instance)  st->print("L");
1296   st->write((char*) name->base(), (int) name->utf8_length());
1297   if (is_instance)  st->print(";");
1298 }
1299 
1300 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) {
1301   assert(is_instance(java_class), "must be a Class object");
1302   Symbol* name;
1303   if (is_primitive(java_class)) {
1304     name = vmSymbols::type_signature(primitive_type(java_class));
1305     // Because this can create a new symbol, the caller has to decrement
1306     // the refcount, so make adjustment here and below for symbols returned
1307     // that are not created or incremented due to a successful lookup.
1308     name->increment_refcount();
1309   } else {
1310     Klass* k = as_Klass(java_class);
1311     if (!k->is_instance_klass()) {
1312       name = k->name();
1313       name->increment_refcount();
1314     } else {
1315       ResourceMark rm;
1316       const char* sigstr = k->signature_name();
1317       int         siglen = (int) strlen(sigstr);
1318       if (!intern_if_not_found) {
1319         name = SymbolTable::probe(sigstr, siglen);
1320       } else {
1321         name = SymbolTable::new_symbol(sigstr, siglen);
1322       }
1323     }
1324   }
1325   return name;
1326 }
1327 
1328 // Returns the Java name for this Java mirror (Resource allocated)
1329 // See Klass::external_name().
1330 // For primitive type Java mirrors, its type name is returned.
1331 const char* java_lang_Class::as_external_name(oop java_class) {
1332   assert(is_instance(java_class), "must be a Class object");
1333   const char* name = nullptr;
1334   if (is_primitive(java_class)) {
1335     name = type2name(primitive_type(java_class));
1336   } else {
1337     name = as_Klass(java_class)->external_name();
1338   }
1339   if (name == nullptr) {
1340     name = "<null>";
1341   }
1342   return name;
1343 }
1344 
1345 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1346   Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1347   assert(k == nullptr || k->is_klass() && k->is_array_klass(), "should be array klass");
1348   return k;
1349 }
1350 
1351 
1352 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1353   assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1354   java_class->release_metadata_field_put(_array_klass_offset, klass);
1355 }
1356 
1357 
1358 BasicType java_lang_Class::primitive_type(oop java_class) {
1359   assert(is_primitive(java_class), "just checking");
1360   Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1361   BasicType type = T_VOID;
1362   if (ak != nullptr) {
1363     // Note: create_basic_type_mirror above initializes ak to a non-null value.
1364     type = ArrayKlass::cast(ak)->element_type();
1365   } else {
1366     assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
1367   }
1368 #ifdef ASSERT
1369   if (DumpSharedSpaces) {
1370     oop mirror = Universe::java_mirror(type);
1371     oop scratch_mirror = HeapShared::scratch_java_mirror(type);
1372     assert(java_class == mirror || java_class == scratch_mirror, "must be consistent");
1373   } else {
1374     assert(Universe::java_mirror(type) == java_class, "must be consistent");
1375   }
1376 #endif
1377   return type;
1378 }
1379 
1380 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1381   assert(is_instance(java_class), "must be a Class object");
1382   if (is_primitive(java_class)) {
1383     if (reference_klass != nullptr)
1384       (*reference_klass) = nullptr;
1385     return primitive_type(java_class);
1386   } else {
1387     if (reference_klass != nullptr)
1388       (*reference_klass) = as_Klass(java_class);
1389     return T_OBJECT;
1390   }
1391 }
1392 
1393 
1394 oop java_lang_Class::primitive_mirror(BasicType t) {
1395   oop mirror = Universe::java_mirror(t);
1396   assert(mirror != nullptr && mirror->is_a(vmClasses::Class_klass()), "must be a Class");
1397   assert(is_primitive(mirror), "must be primitive");
1398   return mirror;
1399 }
1400 
1401 #define CLASS_FIELDS_DO(macro) \
1402   macro(_classRedefinedCount_offset, k, "classRedefinedCount", int_signature,         false); \
1403   macro(_class_loader_offset,        k, "classLoader",         classloader_signature, false); \
1404   macro(_component_mirror_offset,    k, "componentType",       class_signature,       false); \
1405   macro(_module_offset,              k, "module",              module_signature,      false); \
1406   macro(_name_offset,                k, "name",                string_signature,      false); \
1407   macro(_classData_offset,           k, "classData",           object_signature,      false);
1408 
1409 void java_lang_Class::compute_offsets() {
1410   if (_offsets_computed) {
1411     return;
1412   }
1413 
1414   _offsets_computed = true;
1415 
1416   InstanceKlass* k = vmClasses::Class_klass();
1417   CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1418 
1419   CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1420 }
1421 
1422 #if INCLUDE_CDS
1423 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1424   f->do_bool(&_offsets_computed);
1425 
1426   CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1427 
1428   CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1429 }
1430 #endif
1431 
1432 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1433   assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1434   return the_class_mirror->int_field(_classRedefinedCount_offset);
1435 }
1436 
1437 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1438   assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1439   the_class_mirror->int_field_put(_classRedefinedCount_offset, value);
1440 }
1441 
1442 
1443 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1444 //       platform thread structure, and a eetop offset which was used for thread
1445 //       local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1446 //       merged, so in the HotSpot VM we just use the eetop field for the thread
1447 //       instead of the privateInfo_offset.
1448 //
1449 // Note: The stackSize field is only present starting in 1.4.
1450 
1451 int java_lang_Thread_FieldHolder::_group_offset;
1452 int java_lang_Thread_FieldHolder::_priority_offset;
1453 int java_lang_Thread_FieldHolder::_stackSize_offset;
1454 int java_lang_Thread_FieldHolder::_daemon_offset;
1455 int java_lang_Thread_FieldHolder::_thread_status_offset;
1456 
1457 #define THREAD_FIELD_HOLDER_FIELDS_DO(macro) \
1458   macro(_group_offset,         k, vmSymbols::group_name(),    threadgroup_signature, false); \
1459   macro(_priority_offset,      k, vmSymbols::priority_name(), int_signature,         false); \
1460   macro(_stackSize_offset,     k, "stackSize",                long_signature,        false); \
1461   macro(_daemon_offset,        k, vmSymbols::daemon_name(),   bool_signature,        false); \
1462   macro(_thread_status_offset, k, "threadStatus",             int_signature,         false)
1463 
1464 void java_lang_Thread_FieldHolder::compute_offsets() {
1465   assert(_group_offset == 0, "offsets should be initialized only once");
1466 
1467   InstanceKlass* k = vmClasses::Thread_FieldHolder_klass();
1468   THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1469 }
1470 
1471 #if INCLUDE_CDS
1472 void java_lang_Thread_FieldHolder::serialize_offsets(SerializeClosure* f) {
1473   THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1474 }
1475 #endif
1476 
1477 oop java_lang_Thread_FieldHolder::threadGroup(oop holder) {
1478   return holder->obj_field(_group_offset);
1479 }
1480 
1481 ThreadPriority java_lang_Thread_FieldHolder::priority(oop holder) {
1482   return (ThreadPriority)holder->int_field(_priority_offset);
1483 }
1484 
1485 void java_lang_Thread_FieldHolder::set_priority(oop holder, ThreadPriority priority) {
1486   holder->int_field_put(_priority_offset, priority);
1487 }
1488 
1489 jlong java_lang_Thread_FieldHolder::stackSize(oop holder) {
1490   return holder->long_field(_stackSize_offset);
1491 }
1492 
1493 bool java_lang_Thread_FieldHolder::is_daemon(oop holder) {
1494   return holder->bool_field(_daemon_offset) != 0;
1495 }
1496 
1497 void java_lang_Thread_FieldHolder::set_daemon(oop holder, bool val) {
1498   assert(val, "daemon status is never turned off");
1499   holder->bool_field_put(_daemon_offset, val);
1500 }
1501 
1502 void java_lang_Thread_FieldHolder::set_thread_status(oop holder, JavaThreadStatus status) {
1503   holder->int_field_put(_thread_status_offset, static_cast<int>(status));
1504 }
1505 
1506 JavaThreadStatus java_lang_Thread_FieldHolder::get_thread_status(oop holder) {
1507   return static_cast<JavaThreadStatus>(holder->int_field(_thread_status_offset));
1508 }
1509 
1510 
1511 int java_lang_Thread_Constants::_static_VTHREAD_GROUP_offset = 0;
1512 
1513 #define THREAD_CONSTANTS_STATIC_FIELDS_DO(macro) \
1514   macro(_static_VTHREAD_GROUP_offset,             k, "VTHREAD_GROUP",             threadgroup_signature, true);
1515 
1516 void java_lang_Thread_Constants::compute_offsets() {
1517   assert(_static_VTHREAD_GROUP_offset == 0, "offsets should be initialized only once");
1518 
1519   InstanceKlass* k = vmClasses::Thread_Constants_klass();
1520   THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1521 }
1522 
1523 #if INCLUDE_CDS
1524 void java_lang_Thread_Constants::serialize_offsets(SerializeClosure* f) {
1525   THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1526 }
1527 #endif
1528 
1529 oop java_lang_Thread_Constants::get_VTHREAD_GROUP() {
1530   InstanceKlass* k = vmClasses::Thread_Constants_klass();
1531   oop base = k->static_field_base_raw();
1532   return base->obj_field(_static_VTHREAD_GROUP_offset);
1533 }
1534 
1535 
1536 int java_lang_Thread::_holder_offset;
1537 int java_lang_Thread::_name_offset;
1538 int java_lang_Thread::_contextClassLoader_offset;
1539 int java_lang_Thread::_inheritedAccessControlContext_offset;
1540 int java_lang_Thread::_eetop_offset;
1541 int java_lang_Thread::_jvmti_thread_state_offset;
1542 int java_lang_Thread::_jvmti_VTMS_transition_disable_count_offset;
1543 int java_lang_Thread::_jvmti_is_in_VTMS_transition_offset;
1544 int java_lang_Thread::_interrupted_offset;
1545 int java_lang_Thread::_tid_offset;
1546 int java_lang_Thread::_continuation_offset;
1547 int java_lang_Thread::_park_blocker_offset;
1548 int java_lang_Thread::_scopedValueBindings_offset;
1549 JFR_ONLY(int java_lang_Thread::_jfr_epoch_offset;)
1550 
1551 #define THREAD_FIELDS_DO(macro) \
1552   macro(_holder_offset,        k, "holder", thread_fieldholder_signature, false); \
1553   macro(_name_offset,          k, vmSymbols::name_name(), string_signature, false); \
1554   macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \
1555   macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \
1556   macro(_eetop_offset,         k, "eetop", long_signature, false); \
1557   macro(_interrupted_offset,   k, "interrupted", bool_signature, false); \
1558   macro(_tid_offset,           k, "tid", long_signature, false); \
1559   macro(_park_blocker_offset,  k, "parkBlocker", object_signature, false); \
1560   macro(_continuation_offset,  k, "cont", continuation_signature, false); \
1561   macro(_scopedValueBindings_offset, k, "scopedValueBindings", object_signature, false);
1562 
1563 void java_lang_Thread::compute_offsets() {
1564   assert(_holder_offset == 0, "offsets should be initialized only once");
1565 
1566   InstanceKlass* k = vmClasses::Thread_klass();
1567   THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1568   THREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1569 }
1570 
1571 #if INCLUDE_CDS
1572 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1573   THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1574   THREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1575 }
1576 #endif
1577 
1578 JavaThread* java_lang_Thread::thread(oop java_thread) {
1579   return reinterpret_cast<JavaThread*>(java_thread->address_field(_eetop_offset));
1580 }
1581 
1582 JavaThread* java_lang_Thread::thread_acquire(oop java_thread) {
1583   return reinterpret_cast<JavaThread*>(java_thread->address_field_acquire(_eetop_offset));
1584 }
1585 
1586 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1587   java_thread->address_field_put(_eetop_offset, (address)thread);
1588 }
1589 
1590 void java_lang_Thread::release_set_thread(oop java_thread, JavaThread* thread) {
1591   java_thread->release_address_field_put(_eetop_offset, (address)thread);
1592 }
1593 
1594 JvmtiThreadState* java_lang_Thread::jvmti_thread_state(oop java_thread) {
1595   return (JvmtiThreadState*)java_thread->address_field(_jvmti_thread_state_offset);
1596 }
1597 
1598 void java_lang_Thread::set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state) {
1599   java_thread->address_field_put(_jvmti_thread_state_offset, (address)state);
1600 }
1601 
1602 int java_lang_Thread::VTMS_transition_disable_count(oop java_thread) {
1603   return java_thread->int_field(_jvmti_VTMS_transition_disable_count_offset);
1604 }
1605 
1606 void java_lang_Thread::inc_VTMS_transition_disable_count(oop java_thread) {
1607   assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1608   int val = VTMS_transition_disable_count(java_thread);
1609   java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val + 1);
1610 }
1611 
1612 void java_lang_Thread::dec_VTMS_transition_disable_count(oop java_thread) {
1613   assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1614   int val = VTMS_transition_disable_count(java_thread);
1615   assert(val > 0, "VTMS_transition_disable_count should never be negative");
1616   java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val - 1);
1617 }
1618 
1619 bool java_lang_Thread::is_in_VTMS_transition(oop java_thread) {
1620   return java_thread->bool_field_volatile(_jvmti_is_in_VTMS_transition_offset);
1621 }
1622 
1623 void java_lang_Thread::set_is_in_VTMS_transition(oop java_thread, bool val) {
1624   java_thread->bool_field_put_volatile(_jvmti_is_in_VTMS_transition_offset, val);
1625 }
1626 
1627 int java_lang_Thread::is_in_VTMS_transition_offset() {
1628   return _jvmti_is_in_VTMS_transition_offset;
1629 }
1630 
1631 void java_lang_Thread::clear_scopedValueBindings(oop java_thread) {
1632   assert(java_thread != nullptr, "need a java_lang_Thread pointer here");
1633   java_thread->obj_field_put(_scopedValueBindings_offset, nullptr);
1634 }
1635 
1636 oop java_lang_Thread::holder(oop java_thread) {
1637   // Note: may return null if the thread is still attaching
1638   return java_thread->obj_field(_holder_offset);
1639 }
1640 
1641 bool java_lang_Thread::interrupted(oop java_thread) {
1642   // Make sure the caller can safely access oops.
1643   assert(Thread::current()->is_VM_thread() ||
1644          (JavaThread::current()->thread_state() != _thread_blocked &&
1645           JavaThread::current()->thread_state() != _thread_in_native),
1646          "Unsafe access to oop");
1647   return java_thread->bool_field_volatile(_interrupted_offset);
1648 }
1649 
1650 void java_lang_Thread::set_interrupted(oop java_thread, bool val) {
1651   // Make sure the caller can safely access oops.
1652   assert(Thread::current()->is_VM_thread() ||
1653          (JavaThread::current()->thread_state() != _thread_blocked &&
1654           JavaThread::current()->thread_state() != _thread_in_native),
1655          "Unsafe access to oop");
1656   java_thread->bool_field_put_volatile(_interrupted_offset, val);
1657 }
1658 
1659 
1660 oop java_lang_Thread::name(oop java_thread) {
1661   return java_thread->obj_field(_name_offset);
1662 }
1663 
1664 
1665 void java_lang_Thread::set_name(oop java_thread, oop name) {
1666   java_thread->obj_field_put(_name_offset, name);
1667 }
1668 
1669 // Convenience macros for setting and getting Thread fields that
1670 // are actually stored in the FieldHolder object of the thread.
1671 // The FieldHolder can be null whilst a thread is attaching via
1672 // JNI, and when the main thread is attaching.
1673 
1674 // The default value should be the default/zero initialized value
1675 // of the field as it would be in java.lang.Thread.FieldHolder.
1676 #define GET_FIELDHOLDER_FIELD(java_thread, field, default_val)  \
1677   {                                                             \
1678     oop holder = java_lang_Thread::holder(java_thread);         \
1679     if (holder != nullptr)                                      \
1680       return java_lang_Thread_FieldHolder::field(holder);       \
1681     else                                                        \
1682       return default_val;                                       \
1683   }
1684 
1685 // We should never be trying to set a field of an attaching thread.
1686 #define SET_FIELDHOLDER_FIELD(java_thread, field, value)        \
1687   {                                                             \
1688     oop holder = java_lang_Thread::holder(java_thread);         \
1689     assert(holder != nullptr, "Thread not fully initialized");  \
1690     java_lang_Thread_FieldHolder::set_##field(holder, value);   \
1691   }
1692 
1693 
1694 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1695   GET_FIELDHOLDER_FIELD(java_thread, priority, (ThreadPriority)0);
1696 }
1697 
1698 
1699 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1700   SET_FIELDHOLDER_FIELD(java_thread, priority, priority)
1701 }
1702 
1703 
1704 oop java_lang_Thread::threadGroup(oop java_thread) {
1705   GET_FIELDHOLDER_FIELD(java_thread, threadGroup, nullptr);
1706 }
1707 
1708 
1709 bool java_lang_Thread::is_alive(oop java_thread) {
1710   JavaThread* thr = java_lang_Thread::thread(java_thread);
1711   return (thr != nullptr);
1712 }
1713 
1714 
1715 bool java_lang_Thread::is_daemon(oop java_thread) {
1716   GET_FIELDHOLDER_FIELD(java_thread, is_daemon, false);
1717 }
1718 
1719 
1720 void java_lang_Thread::set_daemon(oop java_thread) {
1721   SET_FIELDHOLDER_FIELD(java_thread, daemon, true);
1722 }
1723 
1724 oop java_lang_Thread::context_class_loader(oop java_thread) {
1725   return java_thread->obj_field(_contextClassLoader_offset);
1726 }
1727 
1728 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1729   return java_thread->obj_field(_inheritedAccessControlContext_offset);
1730 }
1731 
1732 
1733 jlong java_lang_Thread::stackSize(oop java_thread) {
1734   GET_FIELDHOLDER_FIELD(java_thread, stackSize, 0);
1735 }
1736 
1737 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1738 void java_lang_Thread::set_thread_status(oop java_thread, JavaThreadStatus status) {
1739   SET_FIELDHOLDER_FIELD(java_thread, thread_status, status);
1740 }
1741 
1742 // Read thread status value from threadStatus field in java.lang.Thread java class.
1743 JavaThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1744   // Make sure the caller is operating on behalf of the VM or is
1745   // running VM code (state == _thread_in_vm).
1746   assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1747          JavaThread::current()->thread_state() == _thread_in_vm,
1748          "Java Thread is not running in vm");
1749   GET_FIELDHOLDER_FIELD(java_thread, get_thread_status, JavaThreadStatus::NEW /* not initialized */);
1750 }
1751 
1752 ByteSize java_lang_Thread::thread_id_offset() {
1753   return in_ByteSize(_tid_offset);
1754 }
1755 
1756 oop java_lang_Thread::park_blocker(oop java_thread) {
1757   return java_thread->obj_field(_park_blocker_offset);
1758 }
1759 
1760 oop java_lang_Thread::async_get_stack_trace(oop java_thread, TRAPS) {
1761   ThreadsListHandle tlh(JavaThread::current());
1762   JavaThread* thread;
1763   bool is_virtual = java_lang_VirtualThread::is_instance(java_thread);
1764   if (is_virtual) {
1765     oop carrier_thread = java_lang_VirtualThread::carrier_thread(java_thread);
1766     if (carrier_thread == nullptr) {
1767       return nullptr;
1768     }
1769     thread = java_lang_Thread::thread(carrier_thread);
1770   } else {
1771     thread = java_lang_Thread::thread(java_thread);
1772   }
1773   if (thread == nullptr) {
1774     return nullptr;
1775   }
1776 
1777   class GetStackTraceClosure : public HandshakeClosure {
1778   public:
1779     const Handle _java_thread;
1780     int _depth;
1781     bool _retry_handshake;
1782     GrowableArray<Method*>* _methods;
1783     GrowableArray<int>*     _bcis;
1784 
1785     GetStackTraceClosure(Handle java_thread) :
1786         HandshakeClosure("GetStackTraceClosure"), _java_thread(java_thread), _depth(0), _retry_handshake(false),
1787         _methods(nullptr), _bcis(nullptr) {
1788     }
1789     ~GetStackTraceClosure() {
1790       delete _methods;
1791       delete _bcis;
1792     }
1793 
1794     bool read_reset_retry() {
1795       bool ret = _retry_handshake;
1796       // If we re-execute the handshake this method need to return false
1797       // when the handshake cannot be performed. (E.g. thread terminating)
1798       _retry_handshake = false;
1799       return ret;
1800     }
1801 
1802     void do_thread(Thread* th) {
1803       if (!Thread::current()->is_Java_thread()) {
1804         _retry_handshake = true;
1805         return;
1806       }
1807 
1808       JavaThread* thread = JavaThread::cast(th);
1809 
1810       if (!thread->has_last_Java_frame()) {
1811         return;
1812       }
1813 
1814       bool carrier = false;
1815       if (java_lang_VirtualThread::is_instance(_java_thread())) {
1816         // if (thread->vthread() != _java_thread()) // We might be inside a System.executeOnCarrierThread
1817         const ContinuationEntry* ce = thread->vthread_continuation();
1818         if (ce == nullptr || ce->cont_oop(thread) != java_lang_VirtualThread::continuation(_java_thread())) {
1819           return; // not mounted
1820         }
1821       } else {
1822         carrier = (thread->vthread_continuation() != nullptr);
1823       }
1824 
1825       const int max_depth = MaxJavaStackTraceDepth;
1826       const bool skip_hidden = !ShowHiddenFrames;
1827 
1828       // Pick minimum length that will cover most cases
1829       int init_length = 64;
1830       _methods = new (mtInternal) GrowableArray<Method*>(init_length, mtInternal);
1831       _bcis = new (mtInternal) GrowableArray<int>(init_length, mtInternal);
1832 
1833       int total_count = 0;
1834       for (vframeStream vfst(thread, false, false, carrier); // we don't process frames as we don't care about oops
1835            !vfst.at_end() && (max_depth == 0 || max_depth != total_count);
1836            vfst.next()) {
1837 
1838         if (skip_hidden && (vfst.method()->is_hidden() ||
1839                             vfst.method()->is_continuation_enter_intrinsic())) {
1840           continue;
1841         }
1842 
1843         _methods->push(vfst.method());
1844         _bcis->push(vfst.bci());
1845         total_count++;
1846       }
1847 
1848       _depth = total_count;
1849     }
1850   };
1851 
1852   // Handshake with target
1853   ResourceMark rm(THREAD);
1854   HandleMark   hm(THREAD);
1855   GetStackTraceClosure gstc(Handle(THREAD, java_thread));
1856   do {
1857    Handshake::execute(&gstc, &tlh, thread);
1858   } while (gstc.read_reset_retry());
1859 
1860   // Stop if no stack trace is found.
1861   if (gstc._depth == 0) {
1862     return nullptr;
1863   }
1864 
1865   // Convert to StackTraceElement array
1866   InstanceKlass* k = vmClasses::StackTraceElement_klass();
1867   assert(k != nullptr, "must be loaded in 1.4+");
1868   if (k->should_be_initialized()) {
1869     k->initialize(CHECK_NULL);
1870   }
1871   objArrayHandle trace = oopFactory::new_objArray_handle(k, gstc._depth, CHECK_NULL);
1872 
1873   for (int i = 0; i < gstc._depth; i++) {
1874     methodHandle method(THREAD, gstc._methods->at(i));
1875     oop element = java_lang_StackTraceElement::create(method,
1876                                                       gstc._bcis->at(i),
1877                                                       CHECK_NULL);
1878     trace->obj_at_put(i, element);
1879   }
1880 
1881   return trace();
1882 }
1883 
1884 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1885   JavaThreadStatus status = get_thread_status(java_thread);
1886   switch (status) {
1887     case JavaThreadStatus::NEW                      : return "NEW";
1888     case JavaThreadStatus::RUNNABLE                 : return "RUNNABLE";
1889     case JavaThreadStatus::SLEEPING                 : return "TIMED_WAITING (sleeping)";
1890     case JavaThreadStatus::IN_OBJECT_WAIT           : return "WAITING (on object monitor)";
1891     case JavaThreadStatus::IN_OBJECT_WAIT_TIMED     : return "TIMED_WAITING (on object monitor)";
1892     case JavaThreadStatus::PARKED                   : return "WAITING (parking)";
1893     case JavaThreadStatus::PARKED_TIMED             : return "TIMED_WAITING (parking)";
1894     case JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1895     case JavaThreadStatus::TERMINATED               : return "TERMINATED";
1896     default                       : return "UNKNOWN";
1897   };
1898 }
1899 int java_lang_ThreadGroup::_parent_offset;
1900 int java_lang_ThreadGroup::_name_offset;
1901 int java_lang_ThreadGroup::_maxPriority_offset;
1902 int java_lang_ThreadGroup::_daemon_offset;
1903 
1904 oop  java_lang_ThreadGroup::parent(oop java_thread_group) {
1905   assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1906   return java_thread_group->obj_field(_parent_offset);
1907 }
1908 
1909 // ("name as oop" accessor is not necessary)
1910 
1911 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
1912   oop name = java_thread_group->obj_field(_name_offset);
1913   // ThreadGroup.name can be null
1914   if (name != nullptr) {
1915     return java_lang_String::as_utf8_string(name);
1916   }
1917   return nullptr;
1918 }
1919 
1920 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1921   assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1922   return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1923 }
1924 
1925 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1926   assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1927   return java_thread_group->bool_field(_daemon_offset) != 0;
1928 }
1929 
1930 #define THREADGROUP_FIELDS_DO(macro) \
1931   macro(_parent_offset,      k, vmSymbols::parent_name(),      threadgroup_signature,         false); \
1932   macro(_name_offset,        k, vmSymbols::name_name(),        string_signature,              false); \
1933   macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature,                 false); \
1934   macro(_daemon_offset,      k, vmSymbols::daemon_name(),      bool_signature,                false);
1935 
1936 void java_lang_ThreadGroup::compute_offsets() {
1937   assert(_parent_offset == 0, "offsets should be initialized only once");
1938 
1939   InstanceKlass* k = vmClasses::ThreadGroup_klass();
1940   THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1941 }
1942 
1943 #if INCLUDE_CDS
1944 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
1945   THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1946 }
1947 #endif
1948 
1949 
1950 // java_lang_VirtualThread
1951 
1952 int java_lang_VirtualThread::static_vthread_scope_offset;
1953 int java_lang_VirtualThread::_carrierThread_offset;
1954 int java_lang_VirtualThread::_continuation_offset;
1955 int java_lang_VirtualThread::_state_offset;
1956 
1957 #define VTHREAD_FIELDS_DO(macro) \
1958   macro(static_vthread_scope_offset,       k, "VTHREAD_SCOPE",      continuationscope_signature, true);  \
1959   macro(_carrierThread_offset,             k, "carrierThread",      thread_signature,            false); \
1960   macro(_continuation_offset,              k, "cont",               continuation_signature,      false); \
1961   macro(_state_offset,                     k, "state",              int_signature,               false)
1962 
1963 
1964 void java_lang_VirtualThread::compute_offsets() {
1965   InstanceKlass* k = vmClasses::VirtualThread_klass();
1966   VTHREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1967 }
1968 
1969 bool java_lang_VirtualThread::is_instance(oop obj) {
1970   return obj != nullptr && is_subclass(obj->klass());
1971 }
1972 
1973 oop java_lang_VirtualThread::carrier_thread(oop vthread) {
1974   oop thread = vthread->obj_field(_carrierThread_offset);
1975   return thread;
1976 }
1977 
1978 oop java_lang_VirtualThread::continuation(oop vthread) {
1979   oop cont = vthread->obj_field(_continuation_offset);
1980   return cont;
1981 }
1982 
1983 int java_lang_VirtualThread::state(oop vthread) {
1984   return vthread->int_field_acquire(_state_offset);
1985 }
1986 
1987 JavaThreadStatus java_lang_VirtualThread::map_state_to_thread_status(int state) {
1988   JavaThreadStatus status = JavaThreadStatus::NEW;
1989   switch (state) {
1990     case NEW :
1991       status = JavaThreadStatus::NEW;
1992       break;
1993     case STARTED :
1994     case RUNNABLE :
1995     case RUNNABLE_SUSPENDED :
1996     case RUNNING :
1997     case PARKING :
1998     case YIELDING :
1999       status = JavaThreadStatus::RUNNABLE;
2000       break;
2001     case PARKED :
2002     case PARKED_SUSPENDED :
2003     case PINNED :
2004       status = JavaThreadStatus::PARKED;
2005       break;
2006     case TERMINATED :
2007       status = JavaThreadStatus::TERMINATED;
2008       break;
2009     default:
2010       ShouldNotReachHere();
2011   }
2012   return status;
2013 }
2014 
2015 #if INCLUDE_CDS
2016 void java_lang_VirtualThread::serialize_offsets(SerializeClosure* f) {
2017    VTHREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2018 }
2019 #endif
2020 
2021 // java_lang_Throwable
2022 
2023 int java_lang_Throwable::_backtrace_offset;
2024 int java_lang_Throwable::_detailMessage_offset;
2025 int java_lang_Throwable::_stackTrace_offset;
2026 int java_lang_Throwable::_depth_offset;
2027 int java_lang_Throwable::_cause_offset;
2028 int java_lang_Throwable::_static_unassigned_stacktrace_offset;
2029 
2030 #define THROWABLE_FIELDS_DO(macro) \
2031   macro(_backtrace_offset,     k, "backtrace",     object_signature,                  false); \
2032   macro(_detailMessage_offset, k, "detailMessage", string_signature,                  false); \
2033   macro(_stackTrace_offset,    k, "stackTrace",    java_lang_StackTraceElement_array, false); \
2034   macro(_depth_offset,         k, "depth",         int_signature,                     false); \
2035   macro(_cause_offset,         k, "cause",         throwable_signature,               false); \
2036   macro(_static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
2037 
2038 void java_lang_Throwable::compute_offsets() {
2039   InstanceKlass* k = vmClasses::Throwable_klass();
2040   THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2041 }
2042 
2043 #if INCLUDE_CDS
2044 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
2045   THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2046 }
2047 #endif
2048 
2049 oop java_lang_Throwable::unassigned_stacktrace() {
2050   InstanceKlass* ik = vmClasses::Throwable_klass();
2051   oop base = ik->static_field_base_raw();
2052   return base->obj_field(_static_unassigned_stacktrace_offset);
2053 }
2054 
2055 oop java_lang_Throwable::backtrace(oop throwable) {
2056   return throwable->obj_field_acquire(_backtrace_offset);
2057 }
2058 
2059 
2060 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
2061   throwable->release_obj_field_put(_backtrace_offset, value);
2062 }
2063 
2064 int java_lang_Throwable::depth(oop throwable) {
2065   return throwable->int_field(_depth_offset);
2066 }
2067 
2068 void java_lang_Throwable::set_depth(oop throwable, int value) {
2069   throwable->int_field_put(_depth_offset, value);
2070 }
2071 
2072 oop java_lang_Throwable::message(oop throwable) {
2073   return throwable->obj_field(_detailMessage_offset);
2074 }
2075 
2076 oop java_lang_Throwable::cause(oop throwable) {
2077   return throwable->obj_field(_cause_offset);
2078 }
2079 
2080 // Return Symbol for detailed_message or null
2081 Symbol* java_lang_Throwable::detail_message(oop throwable) {
2082   PreserveExceptionMark pm(Thread::current());
2083   oop detailed_message = java_lang_Throwable::message(throwable);
2084   if (detailed_message != nullptr) {
2085     return java_lang_String::as_symbol(detailed_message);
2086   }
2087   return nullptr;
2088 }
2089 
2090 void java_lang_Throwable::set_message(oop throwable, oop value) {
2091   throwable->obj_field_put(_detailMessage_offset, value);
2092 }
2093 
2094 
2095 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
2096   throwable->obj_field_put(_stackTrace_offset, st_element_array);
2097 }
2098 
2099 void java_lang_Throwable::clear_stacktrace(oop throwable) {
2100   set_stacktrace(throwable, nullptr);
2101 }
2102 
2103 
2104 void java_lang_Throwable::print(oop throwable, outputStream* st) {
2105   ResourceMark rm;
2106   Klass* k = throwable->klass();
2107   assert(k != nullptr, "just checking");
2108   st->print("%s", k->external_name());
2109   oop msg = message(throwable);
2110   if (msg != nullptr) {
2111     st->print(": %s", java_lang_String::as_utf8_string(msg));
2112   }
2113 }
2114 
2115 // After this many redefines, the stack trace is unreliable.
2116 const int MAX_VERSION = USHRT_MAX;
2117 
2118 static inline bool version_matches(Method* method, int version) {
2119   assert(version < MAX_VERSION, "version is too big");
2120   return method != nullptr && (method->constants()->version() == version);
2121 }
2122 
2123 // This class provides a simple wrapper over the internal structure of
2124 // exception backtrace to insulate users of the backtrace from needing
2125 // to know what it looks like.
2126 // The code of this class is not GC safe. Allocations can only happen
2127 // in expand().
2128 class BacktraceBuilder: public StackObj {
2129  friend class BacktraceIterator;
2130  private:
2131   Handle          _backtrace;
2132   objArrayOop     _head;
2133   typeArrayOop    _methods;
2134   typeArrayOop    _bcis;
2135   objArrayOop     _mirrors;
2136   typeArrayOop    _names; // Needed to insulate method name against redefinition.
2137   // True if the top frame of the backtrace is omitted because it shall be hidden.
2138   bool            _has_hidden_top_frame;
2139   int             _index;
2140   NoSafepointVerifier _nsv;
2141 
2142   enum {
2143     trace_methods_offset = java_lang_Throwable::trace_methods_offset,
2144     trace_bcis_offset    = java_lang_Throwable::trace_bcis_offset,
2145     trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
2146     trace_names_offset   = java_lang_Throwable::trace_names_offset,
2147     trace_conts_offset   = java_lang_Throwable::trace_conts_offset,
2148     trace_next_offset    = java_lang_Throwable::trace_next_offset,
2149     trace_hidden_offset  = java_lang_Throwable::trace_hidden_offset,
2150     trace_size           = java_lang_Throwable::trace_size,
2151     trace_chunk_size     = java_lang_Throwable::trace_chunk_size
2152   };
2153 
2154   // get info out of chunks
2155   static typeArrayOop get_methods(objArrayHandle chunk) {
2156     typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
2157     assert(methods != nullptr, "method array should be initialized in backtrace");
2158     return methods;
2159   }
2160   static typeArrayOop get_bcis(objArrayHandle chunk) {
2161     typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
2162     assert(bcis != nullptr, "bci array should be initialized in backtrace");
2163     return bcis;
2164   }
2165   static objArrayOop get_mirrors(objArrayHandle chunk) {
2166     objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
2167     assert(mirrors != nullptr, "mirror array should be initialized in backtrace");
2168     return mirrors;
2169   }
2170   static typeArrayOop get_names(objArrayHandle chunk) {
2171     typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2172     assert(names != nullptr, "names array should be initialized in backtrace");
2173     return names;
2174   }
2175   static bool has_hidden_top_frame(objArrayHandle chunk) {
2176     oop hidden = chunk->obj_at(trace_hidden_offset);
2177     return hidden != nullptr;
2178   }
2179 
2180  public:
2181 
2182   // constructor for new backtrace
2183   BacktraceBuilder(TRAPS): _head(nullptr), _methods(nullptr), _bcis(nullptr), _mirrors(nullptr), _names(nullptr), _has_hidden_top_frame(false) {
2184     expand(CHECK);
2185     _backtrace = Handle(THREAD, _head);
2186     _index = 0;
2187   }
2188 
2189   BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2190     _methods = get_methods(backtrace);
2191     _bcis = get_bcis(backtrace);
2192     _mirrors = get_mirrors(backtrace);
2193     _names = get_names(backtrace);
2194     _has_hidden_top_frame = has_hidden_top_frame(backtrace);
2195     assert(_methods->length() == _bcis->length() &&
2196            _methods->length() == _mirrors->length() &&
2197            _mirrors->length() == _names->length(),
2198            "method and source information arrays should match");
2199 
2200     // head is the preallocated backtrace
2201     _head = backtrace();
2202     _backtrace = Handle(thread, _head);
2203     _index = 0;
2204   }
2205 
2206   void expand(TRAPS) {
2207     objArrayHandle old_head(THREAD, _head);
2208     PauseNoSafepointVerifier pnsv(&_nsv);
2209 
2210     objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2211     objArrayHandle new_head(THREAD, head);
2212 
2213     typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2214     typeArrayHandle new_methods(THREAD, methods);
2215 
2216     typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2217     typeArrayHandle new_bcis(THREAD, bcis);
2218 
2219     objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2220     objArrayHandle new_mirrors(THREAD, mirrors);
2221 
2222     typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2223     typeArrayHandle new_names(THREAD, names);
2224 
2225     if (!old_head.is_null()) {
2226       old_head->obj_at_put(trace_next_offset, new_head());
2227     }
2228     new_head->obj_at_put(trace_methods_offset, new_methods());
2229     new_head->obj_at_put(trace_bcis_offset, new_bcis());
2230     new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2231     new_head->obj_at_put(trace_names_offset, new_names());
2232     new_head->obj_at_put(trace_hidden_offset, nullptr);
2233 
2234     _head    = new_head();
2235     _methods = new_methods();
2236     _bcis = new_bcis();
2237     _mirrors = new_mirrors();
2238     _names  = new_names();
2239     _index = 0;
2240   }
2241 
2242   oop backtrace() {
2243     return _backtrace();
2244   }
2245 
2246   inline void push(Method* method, int bci, TRAPS) {
2247     // Smear the -1 bci to 0 since the array only holds unsigned
2248     // shorts.  The later line number lookup would just smear the -1
2249     // to a 0 even if it could be recorded.
2250     if (bci == SynchronizationEntryBCI) bci = 0;
2251 
2252     if (_index >= trace_chunk_size) {
2253       methodHandle mhandle(THREAD, method);
2254       expand(CHECK);
2255       method = mhandle();
2256     }
2257 
2258     _methods->ushort_at_put(_index, method->orig_method_idnum());
2259     _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2260 
2261     // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2262     // klass owning the symbols alive so their refcounts aren't decremented.
2263     Symbol* name = method->name();
2264     _names->symbol_at_put(_index, name);
2265 
2266     // We need to save the mirrors in the backtrace to keep the class
2267     // from being unloaded while we still have this stack trace.
2268     assert(method->method_holder()->java_mirror() != nullptr, "never push null for mirror");
2269     _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2270 
2271     _index++;
2272   }
2273 
2274   void set_has_hidden_top_frame() {
2275     if (!_has_hidden_top_frame) {
2276       // It would be nice to add java/lang/Boolean::TRUE here
2277       // to indicate that this backtrace has a hidden top frame.
2278       // But this code is used before TRUE is allocated.
2279       // Therefore let's just use an arbitrary legal oop
2280       // available right here. _methods is a short[].
2281       assert(_methods != nullptr, "we need a legal oop");
2282       _has_hidden_top_frame = true;
2283       _head->obj_at_put(trace_hidden_offset, _methods);
2284     }
2285   }
2286 };
2287 
2288 struct BacktraceElement : public StackObj {
2289   int _method_id;
2290   int _bci;
2291   int _version;
2292   Symbol* _name;
2293   Handle _mirror;
2294   BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2295                    _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2296 };
2297 
2298 class BacktraceIterator : public StackObj {
2299   int _index;
2300   objArrayHandle  _result;
2301   objArrayHandle  _mirrors;
2302   typeArrayHandle _methods;
2303   typeArrayHandle _bcis;
2304   typeArrayHandle _names;
2305 
2306   void init(objArrayHandle result, Thread* thread) {
2307     // Get method id, bci, version and mirror from chunk
2308     _result = result;
2309     if (_result.not_null()) {
2310       _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2311       _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2312       _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2313       _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2314       _index = 0;
2315     }
2316   }
2317  public:
2318   BacktraceIterator(objArrayHandle result, Thread* thread) {
2319     init(result, thread);
2320     assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2321   }
2322 
2323   BacktraceElement next(Thread* thread) {
2324     BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2325                         _methods->ushort_at(_index),
2326                         Backtrace::version_at(_bcis->int_at(_index)),
2327                         Backtrace::bci_at(_bcis->int_at(_index)),
2328                         _names->symbol_at(_index));
2329     _index++;
2330 
2331     if (_index >= java_lang_Throwable::trace_chunk_size) {
2332       int next_offset = java_lang_Throwable::trace_next_offset;
2333       // Get next chunk
2334       objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2335       init(result, thread);
2336     }
2337     return e;
2338   }
2339 
2340   bool repeat() {
2341     return _result.not_null() && _mirrors->obj_at(_index) != nullptr;
2342   }
2343 };
2344 
2345 
2346 // Print stack trace element to resource allocated buffer
2347 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2348                                           int version, int bci, Symbol* name) {
2349   ResourceMark rm;
2350 
2351   // Get strings and string lengths
2352   InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2353   const char* klass_name  = holder->external_name();
2354   int buf_len = (int)strlen(klass_name);
2355 
2356   char* method_name = name->as_C_string();
2357   buf_len += (int)strlen(method_name);
2358 
2359   char* source_file_name = nullptr;
2360   Symbol* source = Backtrace::get_source_file_name(holder, version);
2361   if (source != nullptr) {
2362     source_file_name = source->as_C_string();
2363     buf_len += (int)strlen(source_file_name);
2364   }
2365 
2366   char *module_name = nullptr, *module_version = nullptr;
2367   ModuleEntry* module = holder->module();
2368   if (module->is_named()) {
2369     module_name = module->name()->as_C_string();
2370     buf_len += (int)strlen(module_name);
2371     if (module->version() != nullptr) {
2372       module_version = module->version()->as_C_string();
2373       buf_len += (int)strlen(module_version);
2374     }
2375   }
2376 
2377   // Allocate temporary buffer with extra space for formatting and line number
2378   const size_t buf_size = buf_len + 64;
2379   char* buf = NEW_RESOURCE_ARRAY(char, buf_size);
2380 
2381   // Print stack trace line in buffer
2382   size_t buf_off = os::snprintf_checked(buf, buf_size, "\tat %s.%s(", klass_name, method_name);
2383 
2384   // Print module information
2385   if (module_name != nullptr) {
2386     if (module_version != nullptr) {
2387       buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s@%s/", module_name, module_version);
2388     } else {
2389       buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s/", module_name);
2390     }
2391   }
2392 
2393   // The method can be null if the requested class version is gone
2394   Method* method = holder->method_with_orig_idnum(method_id, version);
2395   if (!version_matches(method, version)) {
2396     strcat(buf, "Redefined)");
2397   } else {
2398     int line_number = Backtrace::get_line_number(method, bci);
2399     if (line_number == -2) {
2400       strcat(buf, "Native Method)");
2401     } else {
2402       if (source_file_name != nullptr && (line_number != -1)) {
2403         // Sourcename and linenumber
2404         buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s:%d)", source_file_name, line_number);
2405       } else if (source_file_name != nullptr) {
2406         // Just sourcename
2407         buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s)", source_file_name);
2408       } else {
2409         // Neither sourcename nor linenumber
2410         buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "Unknown Source)");
2411       }
2412       CompiledMethod* nm = method->code();
2413       if (WizardMode && nm != nullptr) {
2414         os::snprintf_checked(buf + buf_off, buf_size - buf_off, "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
2415       }
2416     }
2417   }
2418 
2419   st->print_cr("%s", buf);
2420 }
2421 
2422 void java_lang_Throwable::print_stack_element(outputStream *st, Method* method, int bci) {
2423   Handle mirror (Thread::current(),  method->method_holder()->java_mirror());
2424   int method_id = method->orig_method_idnum();
2425   int version = method->constants()->version();
2426   print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2427 }
2428 
2429 /**
2430  * Print the throwable message and its stack trace plus all causes by walking the
2431  * cause chain.  The output looks the same as of Throwable.printStackTrace().
2432  */
2433 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2434   // First, print the message.
2435   print(throwable(), st);
2436   st->cr();
2437 
2438   // Now print the stack trace.
2439   JavaThread* THREAD = JavaThread::current(); // For exception macros.
2440   while (throwable.not_null()) {
2441     objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2442     if (result.is_null()) {
2443       st->print_raw_cr("\t<<no stack trace available>>");
2444       return;
2445     }
2446     BacktraceIterator iter(result, THREAD);
2447 
2448     while (iter.repeat()) {
2449       BacktraceElement bte = iter.next(THREAD);
2450       print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2451     }
2452     {
2453       // Call getCause() which doesn't necessarily return the _cause field.
2454       ExceptionMark em(THREAD);
2455       JavaValue cause(T_OBJECT);
2456       JavaCalls::call_virtual(&cause,
2457                               throwable,
2458                               throwable->klass(),
2459                               vmSymbols::getCause_name(),
2460                               vmSymbols::void_throwable_signature(),
2461                               THREAD);
2462       // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2463       if (HAS_PENDING_EXCEPTION) {
2464         CLEAR_PENDING_EXCEPTION;
2465         throwable = Handle();
2466       } else {
2467         throwable = Handle(THREAD, cause.get_oop());
2468         if (throwable.not_null()) {
2469           st->print("Caused by: ");
2470           print(throwable(), st);
2471           st->cr();
2472         }
2473       }
2474     }
2475   }
2476 }
2477 
2478 /**
2479  * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2480  */
2481 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2482   assert(throwable->is_a(vmClasses::Throwable_klass()), "Throwable instance expected");
2483   JavaValue result(T_VOID);
2484   JavaCalls::call_virtual(&result,
2485                           throwable,
2486                           vmClasses::Throwable_klass(),
2487                           vmSymbols::printStackTrace_name(),
2488                           vmSymbols::void_method_signature(),
2489                           THREAD);
2490 }
2491 
2492 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2493   if (!StackTraceInThrowable) return;
2494   ResourceMark rm(THREAD);
2495 
2496   // Start out by clearing the backtrace for this object, in case the VM
2497   // runs out of memory while allocating the stack trace
2498   set_backtrace(throwable(), nullptr);
2499   // Clear lazily constructed Java level stacktrace if refilling occurs
2500   // This is unnecessary in 1.7+ but harmless
2501   clear_stacktrace(throwable());
2502 
2503   int max_depth = MaxJavaStackTraceDepth;
2504   JavaThread* thread = THREAD;
2505 
2506   BacktraceBuilder bt(CHECK);
2507 
2508   // If there is no Java frame just return the method that was being called
2509   // with bci 0
2510   if (!thread->has_last_Java_frame()) {
2511     if (max_depth >= 1 && method() != nullptr) {
2512       bt.push(method(), 0, CHECK);
2513       log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2514       set_depth(throwable(), 1);
2515       set_backtrace(throwable(), bt.backtrace());
2516     }
2517     return;
2518   }
2519 
2520   // Instead of using vframe directly, this version of fill_in_stack_trace
2521   // basically handles everything by hand. This significantly improved the
2522   // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2523   // See bug 6333838 for  more details.
2524   // The "ASSERT" here is to verify this method generates the exactly same stack
2525   // trace as utilizing vframe.
2526 #ifdef ASSERT
2527   vframeStream st(thread, false /* stop_at_java_call_stub */, false /* process_frames */);
2528 #endif
2529   int total_count = 0;
2530   RegisterMap map(thread,
2531                   RegisterMap::UpdateMap::skip,
2532                   RegisterMap::ProcessFrames::skip,
2533                   RegisterMap::WalkContinuation::include);
2534   int decode_offset = 0;
2535   CompiledMethod* nm = nullptr;
2536   bool skip_fillInStackTrace_check = false;
2537   bool skip_throwableInit_check = false;
2538   bool skip_hidden = !ShowHiddenFrames;
2539   bool show_carrier = ShowCarrierFrames;
2540   ContinuationEntry* cont_entry = thread->last_continuation();
2541   for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2542     Method* method = nullptr;
2543     int bci = 0;
2544 
2545     // Compiled java method case.
2546     if (decode_offset != 0) {
2547       DebugInfoReadStream stream(nm, decode_offset);
2548       decode_offset = stream.read_int();
2549       method = (Method*)nm->metadata_at(stream.read_int());
2550       bci = stream.read_bci();
2551     } else {
2552       if (fr.is_first_frame()) break;
2553 
2554       if (Continuation::is_continuation_enterSpecial(fr)) {
2555         assert(cont_entry == Continuation::get_continuation_entry_for_entry_frame(thread, fr), "");
2556         if (!show_carrier && cont_entry->is_virtual_thread()) {
2557           break;
2558         }
2559         cont_entry = cont_entry->parent();
2560       }
2561 
2562       address pc = fr.pc();
2563       if (fr.is_interpreted_frame()) {
2564         address bcp;
2565         if (!map.in_cont()) {
2566           bcp = fr.interpreter_frame_bcp();
2567           method = fr.interpreter_frame_method();
2568         } else {
2569           bcp = map.stack_chunk()->interpreter_frame_bcp(fr);
2570           method = map.stack_chunk()->interpreter_frame_method(fr);
2571         }
2572         bci =  method->bci_from(bcp);
2573         fr = fr.sender(&map);
2574       } else {
2575         CodeBlob* cb = fr.cb();
2576         // HMMM QQQ might be nice to have frame return nm as null if cb is non-null
2577         // but non nmethod
2578         fr = fr.sender(&map);
2579         if (cb == nullptr || !cb->is_compiled()) {
2580           continue;
2581         }
2582         nm = cb->as_compiled_method();
2583         assert(nm->method() != nullptr, "must be");
2584         if (nm->method()->is_native()) {
2585           method = nm->method();
2586           bci = 0;
2587         } else {
2588           PcDesc* pd = nm->pc_desc_at(pc);
2589           decode_offset = pd->scope_decode_offset();
2590           // if decode_offset is not equal to 0, it will execute the
2591           // "compiled java method case" at the beginning of the loop.
2592           continue;
2593         }
2594       }
2595     }
2596 #ifdef ASSERT
2597     if (!st.at_end()) { // TODO LOOM remove once we show only vthread trace
2598       assert(st.method() == method && st.bci() == bci, "Wrong stack trace");
2599       st.next();
2600     }
2601 #endif
2602 
2603     // the format of the stacktrace will be:
2604     // - 1 or more fillInStackTrace frames for the exception class (skipped)
2605     // - 0 or more <init> methods for the exception class (skipped)
2606     // - rest of the stack
2607 
2608     if (!skip_fillInStackTrace_check) {
2609       if (method->name() == vmSymbols::fillInStackTrace_name() &&
2610           throwable->is_a(method->method_holder())) {
2611         continue;
2612       }
2613       else {
2614         skip_fillInStackTrace_check = true; // gone past them all
2615       }
2616     }
2617     if (!skip_throwableInit_check) {
2618       assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2619 
2620       // skip <init> methods of the exception class and superclasses
2621       // This is similar to classic VM.
2622       if (method->name() == vmSymbols::object_initializer_name() &&
2623           throwable->is_a(method->method_holder())) {
2624         continue;
2625       } else {
2626         // there are none or we've seen them all - either way stop checking
2627         skip_throwableInit_check = true;
2628       }
2629     }
2630     if (method->is_hidden() || method->is_continuation_enter_intrinsic()) {
2631       if (skip_hidden) {
2632         if (total_count == 0) {
2633           // The top frame will be hidden from the stack trace.
2634           bt.set_has_hidden_top_frame();
2635         }
2636         continue;
2637       }
2638     }
2639 
2640     bt.push(method, bci, CHECK);
2641     total_count++;
2642   }
2643 
2644   log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2645 
2646   // Put completed stack trace into throwable object
2647   set_backtrace(throwable(), bt.backtrace());
2648   set_depth(throwable(), total_count);
2649 }
2650 
2651 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2652   // No-op if stack trace is disabled
2653   if (!StackTraceInThrowable) {
2654     return;
2655   }
2656 
2657   // Disable stack traces for some preallocated out of memory errors
2658   if (!Universe::should_fill_in_stack_trace(throwable)) {
2659     return;
2660   }
2661 
2662   JavaThread* THREAD = JavaThread::current(); // For exception macros.
2663   PreserveExceptionMark pm(THREAD);
2664 
2665   fill_in_stack_trace(throwable, method, THREAD);
2666   // Ignore exceptions thrown during stack trace filling (OOM) and reinstall the
2667   // original exception via the PreserveExceptionMark destructor.
2668   CLEAR_PENDING_EXCEPTION;
2669 }
2670 
2671 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2672   // Allocate stack trace - backtrace is created but not filled in
2673 
2674   // No-op if stack trace is disabled
2675   if (!StackTraceInThrowable) return;
2676   BacktraceBuilder bt(CHECK);   // creates a backtrace
2677   set_backtrace(throwable(), bt.backtrace());
2678 }
2679 
2680 
2681 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2682   // Fill in stack trace into preallocated backtrace (no GC)
2683 
2684   // No-op if stack trace is disabled
2685   if (!StackTraceInThrowable) return;
2686 
2687   assert(throwable->is_a(vmClasses::Throwable_klass()), "sanity check");
2688 
2689   JavaThread* THREAD = JavaThread::current(); // For exception macros.
2690 
2691   objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2692   assert(backtrace.not_null(), "backtrace should have been preallocated");
2693 
2694   ResourceMark rm(THREAD);
2695   vframeStream st(THREAD, false /* stop_at_java_call_stub */, false /* process_frames */);
2696 
2697   BacktraceBuilder bt(THREAD, backtrace);
2698 
2699   // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2700   // methods as preallocated errors aren't created by "java" code.
2701 
2702   // fill in as much stack trace as possible
2703   int chunk_count = 0;
2704   for (;!st.at_end(); st.next()) {
2705     bt.push(st.method(), st.bci(), CHECK);
2706     chunk_count++;
2707 
2708     // Bail-out for deep stacks
2709     if (chunk_count >= trace_chunk_size) break;
2710   }
2711   set_depth(throwable(), chunk_count);
2712   log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2713 
2714   // We support the Throwable immutability protocol defined for Java 7.
2715   java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2716   assert(java_lang_Throwable::unassigned_stacktrace() != nullptr, "not initialized");
2717 }
2718 
2719 void java_lang_Throwable::get_stack_trace_elements(int depth, Handle backtrace,
2720                                                    objArrayHandle stack_trace_array_h, TRAPS) {
2721 
2722   if (backtrace.is_null() || stack_trace_array_h.is_null()) {
2723     THROW(vmSymbols::java_lang_NullPointerException());
2724   }
2725 
2726   assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2727 
2728   if (stack_trace_array_h->length() != depth) {
2729     THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2730   }
2731 
2732   objArrayHandle result(THREAD, objArrayOop(backtrace()));
2733   BacktraceIterator iter(result, THREAD);
2734 
2735   int index = 0;
2736   while (iter.repeat()) {
2737     BacktraceElement bte = iter.next(THREAD);
2738 
2739     Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2740 
2741     if (stack_trace_element.is_null()) {
2742       THROW(vmSymbols::java_lang_NullPointerException());
2743     }
2744 
2745     InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2746     methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2747 
2748     java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2749                                          method,
2750                                          bte._version,
2751                                          bte._bci,
2752                                          bte._name,
2753                                          CHECK);
2754   }
2755 }
2756 
2757 Handle java_lang_Throwable::create_initialization_error(JavaThread* current, Handle throwable) {
2758   // Creates an ExceptionInInitializerError to be recorded as the initialization error when class initialization
2759   // failed due to the passed in 'throwable'. We cannot save 'throwable' directly due to issues with keeping alive
2760   // all objects referenced via its stacktrace. So instead we save a new EIIE instance, with the same message and
2761   // symbolic stacktrace of 'throwable'.
2762   assert(throwable.not_null(), "shouldn't be");
2763 
2764   // Now create the message from the original exception and thread name.
2765   ResourceMark rm(current);
2766   const char *message = nullptr;
2767   oop detailed_message = java_lang_Throwable::message(throwable());
2768   if (detailed_message != nullptr) {
2769     message = java_lang_String::as_utf8_string(detailed_message);
2770   }
2771   stringStream st;
2772   st.print("Exception %s%s ", throwable()->klass()->name()->as_klass_external_name(),
2773              message == nullptr ? "" : ":");
2774   if (message == nullptr) {
2775     st.print("[in thread \"%s\"]", current->name());
2776   } else {
2777     st.print("%s [in thread \"%s\"]", message, current->name());
2778   }
2779 
2780   Symbol* exception_name = vmSymbols::java_lang_ExceptionInInitializerError();
2781   Handle init_error = Exceptions::new_exception(current, exception_name, st.as_string());
2782   // If new_exception returns a different exception while creating the exception,
2783   // abandon the attempt to save the initialization error and return null.
2784   if (init_error->klass()->name() != exception_name) {
2785     log_info(class, init)("Exception %s thrown while saving initialization exception",
2786                         init_error->klass()->external_name());
2787     return Handle();
2788   }
2789 
2790   // Call to java to fill in the stack trace and clear declaringClassObject to
2791   // not keep classes alive in the stack trace.
2792   // call this:  public StackTraceElement[] getStackTrace()
2793   JavaValue result(T_ARRAY);
2794   JavaCalls::call_virtual(&result, throwable,
2795                           vmClasses::Throwable_klass(),
2796                           vmSymbols::getStackTrace_name(),
2797                           vmSymbols::getStackTrace_signature(),
2798                           current);
2799   if (!current->has_pending_exception()){
2800     Handle stack_trace(current, result.get_oop());
2801     assert(stack_trace->is_objArray(), "Should be an array");
2802     java_lang_Throwable::set_stacktrace(init_error(), stack_trace());
2803     // Clear backtrace because the stacktrace should be used instead.
2804     set_backtrace(init_error(), nullptr);
2805   } else {
2806     log_info(class, init)("Exception thrown while getting stack trace for initialization exception %s",
2807                         init_error->klass()->external_name());
2808     current->clear_pending_exception();
2809   }
2810 
2811   return init_error;
2812 }
2813 
2814 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) {
2815   JavaThread* current = JavaThread::current();
2816   objArrayHandle result(current, objArrayOop(backtrace(throwable)));
2817   BacktraceIterator iter(result, current);
2818   // No backtrace available.
2819   if (!iter.repeat()) return false;
2820 
2821   // If the exception happened in a frame that has been hidden, i.e.,
2822   // omitted from the back trace, we can not compute the message.
2823   oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset);
2824   if (hidden != nullptr) {
2825     return false;
2826   }
2827 
2828   // Get first backtrace element.
2829   BacktraceElement bte = iter.next(current);
2830 
2831   InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2832   assert(holder != nullptr, "first element should be non-null");
2833   Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version);
2834 
2835   // Original version is no longer available.
2836   if (m == nullptr || !version_matches(m, bte._version)) {
2837     return false;
2838   }
2839 
2840   *method = m;
2841   *bci = bte._bci;
2842   return true;
2843 }
2844 
2845 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
2846   // Allocate java.lang.StackTraceElement instance
2847   InstanceKlass* k = vmClasses::StackTraceElement_klass();
2848   assert(k != nullptr, "must be loaded in 1.4+");
2849   if (k->should_be_initialized()) {
2850     k->initialize(CHECK_NULL);
2851   }
2852 
2853   Handle element = k->allocate_instance_handle(CHECK_NULL);
2854 
2855   int version = method->constants()->version();
2856   fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_NULL);
2857   return element();
2858 }
2859 
2860 void java_lang_StackTraceElement::fill_in(Handle element,
2861                                           InstanceKlass* holder, const methodHandle& method,
2862                                           int version, int bci, Symbol* name, TRAPS) {
2863   assert(element->is_a(vmClasses::StackTraceElement_klass()), "sanity check");
2864 
2865   ResourceMark rm(THREAD);
2866   HandleMark hm(THREAD);
2867 
2868   // Fill in class name
2869   Handle java_class(THREAD, holder->java_mirror());
2870   oop classname = java_lang_Class::name(java_class, CHECK);
2871   java_lang_StackTraceElement::set_declaringClass(element(), classname);
2872   java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
2873 
2874   oop loader = holder->class_loader();
2875   if (loader != nullptr) {
2876     oop loader_name = java_lang_ClassLoader::name(loader);
2877     if (loader_name != nullptr)
2878       java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
2879   }
2880 
2881   // Fill in method name
2882   oop methodname = StringTable::intern(name, CHECK);
2883   java_lang_StackTraceElement::set_methodName(element(), methodname);
2884 
2885   // Fill in module name and version
2886   ModuleEntry* module = holder->module();
2887   if (module->is_named()) {
2888     oop module_name = StringTable::intern(module->name(), CHECK);
2889     java_lang_StackTraceElement::set_moduleName(element(), module_name);
2890     oop module_version;
2891     if (module->version() != nullptr) {
2892       module_version = StringTable::intern(module->version(), CHECK);
2893     } else {
2894       module_version = nullptr;
2895     }
2896     java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
2897   }
2898 
2899   if (method() == nullptr || !version_matches(method(), version)) {
2900     // The method was redefined, accurate line number information isn't available
2901     java_lang_StackTraceElement::set_fileName(element(), nullptr);
2902     java_lang_StackTraceElement::set_lineNumber(element(), -1);
2903   } else {
2904     Symbol* source;
2905     oop source_file;
2906     int line_number;
2907     decode_file_and_line(java_class, holder, version, method, bci, source, source_file, line_number, CHECK);
2908 
2909     java_lang_StackTraceElement::set_fileName(element(), source_file);
2910     java_lang_StackTraceElement::set_lineNumber(element(), line_number);
2911   }
2912 }
2913 
2914 void java_lang_StackTraceElement::decode_file_and_line(Handle java_class,
2915                                                        InstanceKlass* holder,
2916                                                        int version,
2917                                                        const methodHandle& method,
2918                                                        int bci,
2919                                                        Symbol*& source,
2920                                                        oop& source_file,
2921                                                        int& line_number, TRAPS) {
2922   // Fill in source file name and line number.
2923   source = Backtrace::get_source_file_name(holder, version);
2924   source_file = java_lang_Class::source_file(java_class());
2925   if (source != nullptr) {
2926     // Class was not redefined. We can trust its cache if set,
2927     // else we have to initialize it.
2928     if (source_file == nullptr) {
2929       source_file = StringTable::intern(source, CHECK);
2930       java_lang_Class::set_source_file(java_class(), source_file);
2931     }
2932   } else {
2933     // Class was redefined. Dump the cache if it was set.
2934     if (source_file != nullptr) {
2935       source_file = nullptr;
2936       java_lang_Class::set_source_file(java_class(), source_file);
2937     }
2938   }
2939   line_number = Backtrace::get_line_number(method(), bci);
2940 }
2941 
2942 #if INCLUDE_JVMCI
2943 void java_lang_StackTraceElement::decode(const methodHandle& method, int bci,
2944                                          Symbol*& filename, int& line_number, TRAPS) {
2945   ResourceMark rm(THREAD);
2946   HandleMark hm(THREAD);
2947 
2948   filename = nullptr;
2949   line_number = -1;
2950 
2951   oop source_file;
2952   int version = method->constants()->version();
2953   InstanceKlass* holder = method->method_holder();
2954   Handle java_class(THREAD, holder->java_mirror());
2955   decode_file_and_line(java_class, holder, version, method, bci, filename, source_file, line_number, CHECK);
2956 }
2957 #endif // INCLUDE_JVMCI
2958 
2959 // java_lang_ClassFrameInfo
2960 
2961 int java_lang_ClassFrameInfo::_classOrMemberName_offset;
2962 int java_lang_ClassFrameInfo::_flags_offset;
2963 
2964 #define CLASSFRAMEINFO_FIELDS_DO(macro) \
2965   macro(_classOrMemberName_offset, k, "classOrMemberName", object_signature,  false); \
2966   macro(_flags_offset,             k, vmSymbols::flags_name(), int_signature, false)
2967 
2968 void java_lang_ClassFrameInfo::compute_offsets() {
2969   InstanceKlass* k = vmClasses::ClassFrameInfo_klass();
2970   CLASSFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2971 }
2972 
2973 #if INCLUDE_CDS
2974 void java_lang_ClassFrameInfo::serialize_offsets(SerializeClosure* f) {
2975   CLASSFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2976 }
2977 #endif
2978 
2979 static int get_flags(const methodHandle& m) {
2980   int flags = (jushort)( m->access_flags().as_short() & JVM_RECOGNIZED_METHOD_MODIFIERS );
2981   if (m->is_initializer()) {
2982     flags |= java_lang_invoke_MemberName::MN_IS_CONSTRUCTOR;
2983   } else {
2984     flags |= java_lang_invoke_MemberName::MN_IS_METHOD;
2985   }
2986   if (m->caller_sensitive()) {
2987     flags |= java_lang_invoke_MemberName::MN_CALLER_SENSITIVE;
2988   }
2989   if (m->is_hidden()) {
2990     flags |= java_lang_invoke_MemberName::MN_HIDDEN_MEMBER;
2991   }
2992   assert((flags & 0xFF000000) == 0, "unexpected flags");
2993   return flags;
2994 }
2995 
2996 oop java_lang_ClassFrameInfo::classOrMemberName(oop obj) {
2997   return obj->obj_field(_classOrMemberName_offset);
2998 }
2999 
3000 int java_lang_ClassFrameInfo::flags(oop obj) {
3001   return obj->int_field(_flags_offset);
3002 }
3003 
3004 void java_lang_ClassFrameInfo::init_class(Handle stackFrame, const methodHandle& m) {
3005   stackFrame->obj_field_put(_classOrMemberName_offset, m->method_holder()->java_mirror());
3006   // flags is initialized when ClassFrameInfo object is constructed and retain the value
3007   int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3008   stackFrame->int_field_put(_flags_offset, flags);
3009 }
3010 
3011 void java_lang_ClassFrameInfo::init_method(Handle stackFrame, const methodHandle& m, TRAPS) {
3012   oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(m, CHECK);
3013   stackFrame->obj_field_put(_classOrMemberName_offset, rmethod_name);
3014   // flags is initialized when ClassFrameInfo object is constructed and retain the value
3015   int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3016   stackFrame->int_field_put(_flags_offset, flags);
3017 }
3018 
3019 
3020 // java_lang_StackFrameInfo
3021 
3022 int java_lang_StackFrameInfo::_type_offset;
3023 int java_lang_StackFrameInfo::_name_offset;
3024 int java_lang_StackFrameInfo::_bci_offset;
3025 int java_lang_StackFrameInfo::_version_offset;
3026 int java_lang_StackFrameInfo::_contScope_offset;
3027 
3028 #define STACKFRAMEINFO_FIELDS_DO(macro) \
3029   macro(_type_offset,       k, "type",       object_signature,            false); \
3030   macro(_name_offset,       k, "name",       string_signature,            false); \
3031   macro(_bci_offset,        k, "bci",        int_signature,               false); \
3032   macro(_contScope_offset,  k, "contScope",  continuationscope_signature, false)
3033 
3034 void java_lang_StackFrameInfo::compute_offsets() {
3035   InstanceKlass* k = vmClasses::StackFrameInfo_klass();
3036   STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3037   STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3038 }
3039 
3040 #if INCLUDE_CDS
3041 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
3042   STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3043   STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3044 }
3045 #endif
3046 
3047 Method* java_lang_StackFrameInfo::get_method(oop obj) {
3048   oop m = java_lang_ClassFrameInfo::classOrMemberName(obj);
3049   Method* method = java_lang_invoke_ResolvedMethodName::vmtarget(m);
3050   return method;
3051 }
3052 
3053 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS) {
3054   // set Method* or mid/cpref
3055   HandleMark hm(THREAD);
3056   Handle cont_h(THREAD, cont);
3057   java_lang_ClassFrameInfo::init_method(stackFrame, method, CHECK);
3058 
3059   // set bci
3060   java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
3061   // method may be redefined; store the version
3062   int version = method->constants()->version();
3063   assert((jushort)version == version, "version should be short");
3064   java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
3065 
3066   oop contScope = cont_h() != nullptr ? jdk_internal_vm_Continuation::scope(cont_h()) : (oop)nullptr;
3067   java_lang_StackFrameInfo::set_contScope(stackFrame(), contScope);
3068 }
3069 
3070 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
3071   ResourceMark rm(THREAD);
3072   HandleMark hm(THREAD);
3073 
3074   Method* method = java_lang_StackFrameInfo::get_method(stackFrame());
3075   InstanceKlass* holder = method->method_holder();
3076   short version = stackFrame->short_field(_version_offset);
3077   int bci = stackFrame->int_field(_bci_offset);
3078   Symbol* name = method->name();
3079   java_lang_StackTraceElement::fill_in(stack_trace_element, holder, methodHandle(THREAD, method), version, bci, name, CHECK);
3080 }
3081 
3082 oop java_lang_StackFrameInfo::type(oop obj) {
3083   return obj->obj_field(_type_offset);
3084 }
3085 
3086 void java_lang_StackFrameInfo::set_type(oop obj, oop value) {
3087   obj->obj_field_put(_type_offset, value);
3088 }
3089 
3090 oop java_lang_StackFrameInfo::name(oop obj) {
3091   return obj->obj_field(_name_offset);
3092 }
3093 
3094 void java_lang_StackFrameInfo::set_name(oop obj, oop value) {
3095   obj->obj_field_put(_name_offset, value);
3096 }
3097 
3098 void java_lang_StackFrameInfo::set_version(oop obj, short value) {
3099   obj->short_field_put(_version_offset, value);
3100 }
3101 
3102 void java_lang_StackFrameInfo::set_bci(oop obj, int value) {
3103   assert(value >= 0 && value < max_jushort, "must be a valid bci value");
3104   obj->int_field_put(_bci_offset, value);
3105 }
3106 
3107 void java_lang_StackFrameInfo::set_contScope(oop obj, oop value) {
3108   obj->obj_field_put(_contScope_offset, value);
3109 }
3110 
3111 int java_lang_LiveStackFrameInfo::_monitors_offset;
3112 int java_lang_LiveStackFrameInfo::_locals_offset;
3113 int java_lang_LiveStackFrameInfo::_operands_offset;
3114 int java_lang_LiveStackFrameInfo::_mode_offset;
3115 
3116 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
3117   macro(_monitors_offset,   k, "monitors",    object_array_signature, false); \
3118   macro(_locals_offset,     k, "locals",      object_array_signature, false); \
3119   macro(_operands_offset,   k, "operands",    object_array_signature, false); \
3120   macro(_mode_offset,       k, "mode",        int_signature,          false)
3121 
3122 void java_lang_LiveStackFrameInfo::compute_offsets() {
3123   InstanceKlass* k = vmClasses::LiveStackFrameInfo_klass();
3124   LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3125 }
3126 
3127 #if INCLUDE_CDS
3128 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
3129   LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3130 }
3131 #endif
3132 
3133 void java_lang_LiveStackFrameInfo::set_monitors(oop obj, oop value) {
3134   obj->obj_field_put(_monitors_offset, value);
3135 }
3136 
3137 void java_lang_LiveStackFrameInfo::set_locals(oop obj, oop value) {
3138   obj->obj_field_put(_locals_offset, value);
3139 }
3140 
3141 void java_lang_LiveStackFrameInfo::set_operands(oop obj, oop value) {
3142   obj->obj_field_put(_operands_offset, value);
3143 }
3144 
3145 void java_lang_LiveStackFrameInfo::set_mode(oop obj, int value) {
3146   obj->int_field_put(_mode_offset, value);
3147 }
3148 
3149 
3150 // java_lang_AccessibleObject
3151 
3152 int java_lang_reflect_AccessibleObject::_override_offset;
3153 
3154 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
3155   macro(_override_offset, k, "override", bool_signature, false)
3156 
3157 void java_lang_reflect_AccessibleObject::compute_offsets() {
3158   InstanceKlass* k = vmClasses::reflect_AccessibleObject_klass();
3159   ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3160 }
3161 
3162 #if INCLUDE_CDS
3163 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
3164   ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3165 }
3166 #endif
3167 
3168 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
3169   return (jboolean) reflect->bool_field(_override_offset);
3170 }
3171 
3172 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
3173   reflect->bool_field_put(_override_offset, (int) value);
3174 }
3175 
3176 // java_lang_reflect_Method
3177 
3178 int java_lang_reflect_Method::_clazz_offset;
3179 int java_lang_reflect_Method::_name_offset;
3180 int java_lang_reflect_Method::_returnType_offset;
3181 int java_lang_reflect_Method::_parameterTypes_offset;
3182 int java_lang_reflect_Method::_exceptionTypes_offset;
3183 int java_lang_reflect_Method::_slot_offset;
3184 int java_lang_reflect_Method::_modifiers_offset;
3185 int java_lang_reflect_Method::_signature_offset;
3186 int java_lang_reflect_Method::_annotations_offset;
3187 int java_lang_reflect_Method::_parameter_annotations_offset;
3188 int java_lang_reflect_Method::_annotation_default_offset;
3189 
3190 #define METHOD_FIELDS_DO(macro) \
3191   macro(_clazz_offset,          k, vmSymbols::clazz_name(),          class_signature,       false); \
3192   macro(_name_offset,           k, vmSymbols::name_name(),           string_signature,      false); \
3193   macro(_returnType_offset,     k, vmSymbols::returnType_name(),     class_signature,       false); \
3194   macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3195   macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3196   macro(_slot_offset,           k, vmSymbols::slot_name(),           int_signature,         false); \
3197   macro(_modifiers_offset,      k, vmSymbols::modifiers_name(),      int_signature,         false); \
3198   macro(_signature_offset,             k, vmSymbols::signature_name(),             string_signature,     false); \
3199   macro(_annotations_offset,           k, vmSymbols::annotations_name(),           byte_array_signature, false); \
3200   macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
3201   macro(_annotation_default_offset,    k, vmSymbols::annotation_default_name(),    byte_array_signature, false);
3202 
3203 void java_lang_reflect_Method::compute_offsets() {
3204   InstanceKlass* k = vmClasses::reflect_Method_klass();
3205   METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3206 }
3207 
3208 #if INCLUDE_CDS
3209 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
3210   METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3211 }
3212 #endif
3213 
3214 Handle java_lang_reflect_Method::create(TRAPS) {
3215   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3216   Klass* klass = vmClasses::reflect_Method_klass();
3217   // This class is eagerly initialized during VM initialization, since we keep a reference
3218   // to one of the methods
3219   assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
3220   return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
3221 }
3222 
3223 oop java_lang_reflect_Method::clazz(oop reflect) {
3224   return reflect->obj_field(_clazz_offset);
3225 }
3226 
3227 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
3228    reflect->obj_field_put(_clazz_offset, value);
3229 }
3230 
3231 int java_lang_reflect_Method::slot(oop reflect) {
3232   return reflect->int_field(_slot_offset);
3233 }
3234 
3235 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
3236   reflect->int_field_put(_slot_offset, value);
3237 }
3238 
3239 void java_lang_reflect_Method::set_name(oop method, oop value) {
3240   method->obj_field_put(_name_offset, value);
3241 }
3242 
3243 oop java_lang_reflect_Method::return_type(oop method) {
3244   return method->obj_field(_returnType_offset);
3245 }
3246 
3247 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
3248   method->obj_field_put(_returnType_offset, value);
3249 }
3250 
3251 oop java_lang_reflect_Method::parameter_types(oop method) {
3252   return method->obj_field(_parameterTypes_offset);
3253 }
3254 
3255 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
3256   method->obj_field_put(_parameterTypes_offset, value);
3257 }
3258 
3259 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
3260   method->obj_field_put(_exceptionTypes_offset, value);
3261 }
3262 
3263 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
3264   method->int_field_put(_modifiers_offset, value);
3265 }
3266 
3267 void java_lang_reflect_Method::set_signature(oop method, oop value) {
3268   method->obj_field_put(_signature_offset, value);
3269 }
3270 
3271 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
3272   method->obj_field_put(_annotations_offset, value);
3273 }
3274 
3275 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
3276   method->obj_field_put(_parameter_annotations_offset, value);
3277 }
3278 
3279 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
3280   method->obj_field_put(_annotation_default_offset, value);
3281 }
3282 
3283 int java_lang_reflect_Constructor::_clazz_offset;
3284 int java_lang_reflect_Constructor::_parameterTypes_offset;
3285 int java_lang_reflect_Constructor::_exceptionTypes_offset;
3286 int java_lang_reflect_Constructor::_slot_offset;
3287 int java_lang_reflect_Constructor::_modifiers_offset;
3288 int java_lang_reflect_Constructor::_signature_offset;
3289 int java_lang_reflect_Constructor::_annotations_offset;
3290 int java_lang_reflect_Constructor::_parameter_annotations_offset;
3291 
3292 #define CONSTRUCTOR_FIELDS_DO(macro) \
3293   macro(_clazz_offset,          k, vmSymbols::clazz_name(),          class_signature,       false); \
3294   macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3295   macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3296   macro(_slot_offset,           k, vmSymbols::slot_name(),           int_signature,         false); \
3297   macro(_modifiers_offset,      k, vmSymbols::modifiers_name(),      int_signature,         false); \
3298   macro(_signature_offset,             k, vmSymbols::signature_name(),             string_signature,     false); \
3299   macro(_annotations_offset,           k, vmSymbols::annotations_name(),           byte_array_signature, false); \
3300   macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
3301 
3302 void java_lang_reflect_Constructor::compute_offsets() {
3303   InstanceKlass* k = vmClasses::reflect_Constructor_klass();
3304   CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3305 }
3306 
3307 #if INCLUDE_CDS
3308 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
3309   CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3310 }
3311 #endif
3312 
3313 Handle java_lang_reflect_Constructor::create(TRAPS) {
3314   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3315   Symbol* name = vmSymbols::java_lang_reflect_Constructor();
3316   Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3317   InstanceKlass* ik = InstanceKlass::cast(k);
3318   // Ensure it is initialized
3319   ik->initialize(CHECK_NH);
3320   return ik->allocate_instance_handle(THREAD);
3321 }
3322 
3323 oop java_lang_reflect_Constructor::clazz(oop reflect) {
3324   return reflect->obj_field(_clazz_offset);
3325 }
3326 
3327 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
3328    reflect->obj_field_put(_clazz_offset, value);
3329 }
3330 
3331 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
3332   return constructor->obj_field(_parameterTypes_offset);
3333 }
3334 
3335 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
3336   constructor->obj_field_put(_parameterTypes_offset, value);
3337 }
3338 
3339 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
3340   constructor->obj_field_put(_exceptionTypes_offset, value);
3341 }
3342 
3343 int java_lang_reflect_Constructor::slot(oop reflect) {
3344   return reflect->int_field(_slot_offset);
3345 }
3346 
3347 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
3348   reflect->int_field_put(_slot_offset, value);
3349 }
3350 
3351 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
3352   constructor->int_field_put(_modifiers_offset, value);
3353 }
3354 
3355 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
3356   constructor->obj_field_put(_signature_offset, value);
3357 }
3358 
3359 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
3360   constructor->obj_field_put(_annotations_offset, value);
3361 }
3362 
3363 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
3364   method->obj_field_put(_parameter_annotations_offset, value);
3365 }
3366 
3367 int java_lang_reflect_Field::_clazz_offset;
3368 int java_lang_reflect_Field::_name_offset;
3369 int java_lang_reflect_Field::_type_offset;
3370 int java_lang_reflect_Field::_slot_offset;
3371 int java_lang_reflect_Field::_modifiers_offset;
3372 int java_lang_reflect_Field::_trusted_final_offset;
3373 int java_lang_reflect_Field::_signature_offset;
3374 int java_lang_reflect_Field::_annotations_offset;
3375 
3376 #define FIELD_FIELDS_DO(macro) \
3377   macro(_clazz_offset,     k, vmSymbols::clazz_name(),     class_signature,  false); \
3378   macro(_name_offset,      k, vmSymbols::name_name(),      string_signature, false); \
3379   macro(_type_offset,      k, vmSymbols::type_name(),      class_signature,  false); \
3380   macro(_slot_offset,      k, vmSymbols::slot_name(),      int_signature,    false); \
3381   macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature,    false); \
3382   macro(_trusted_final_offset,    k, vmSymbols::trusted_final_name(),    bool_signature,       false); \
3383   macro(_signature_offset,        k, vmSymbols::signature_name(),        string_signature,     false); \
3384   macro(_annotations_offset,      k, vmSymbols::annotations_name(),      byte_array_signature, false);
3385 
3386 void java_lang_reflect_Field::compute_offsets() {
3387   InstanceKlass* k = vmClasses::reflect_Field_klass();
3388   FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3389 }
3390 
3391 #if INCLUDE_CDS
3392 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
3393   FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3394 }
3395 #endif
3396 
3397 Handle java_lang_reflect_Field::create(TRAPS) {
3398   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3399   Symbol* name = vmSymbols::java_lang_reflect_Field();
3400   Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3401   InstanceKlass* ik = InstanceKlass::cast(k);
3402   // Ensure it is initialized
3403   ik->initialize(CHECK_NH);
3404   return ik->allocate_instance_handle(THREAD);
3405 }
3406 
3407 oop java_lang_reflect_Field::clazz(oop reflect) {
3408   return reflect->obj_field(_clazz_offset);
3409 }
3410 
3411 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
3412   reflect->obj_field_put(_clazz_offset, value);
3413 }
3414 
3415 oop java_lang_reflect_Field::name(oop field) {
3416   return field->obj_field(_name_offset);
3417 }
3418 
3419 void java_lang_reflect_Field::set_name(oop field, oop value) {
3420   field->obj_field_put(_name_offset, value);
3421 }
3422 
3423 oop java_lang_reflect_Field::type(oop field) {
3424   return field->obj_field(_type_offset);
3425 }
3426 
3427 void java_lang_reflect_Field::set_type(oop field, oop value) {
3428   field->obj_field_put(_type_offset, value);
3429 }
3430 
3431 int java_lang_reflect_Field::slot(oop reflect) {
3432   return reflect->int_field(_slot_offset);
3433 }
3434 
3435 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
3436   reflect->int_field_put(_slot_offset, value);
3437 }
3438 
3439 int java_lang_reflect_Field::modifiers(oop field) {
3440   return field->int_field(_modifiers_offset);
3441 }
3442 
3443 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
3444   field->int_field_put(_modifiers_offset, value);
3445 }
3446 
3447 void java_lang_reflect_Field::set_trusted_final(oop field) {
3448   field->bool_field_put(_trusted_final_offset, true);
3449 }
3450 
3451 void java_lang_reflect_Field::set_signature(oop field, oop value) {
3452   field->obj_field_put(_signature_offset, value);
3453 }
3454 
3455 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
3456   field->obj_field_put(_annotations_offset, value);
3457 }
3458 
3459 oop java_lang_reflect_RecordComponent::create(InstanceKlass* holder, RecordComponent* component, TRAPS) {
3460   // Allocate java.lang.reflect.RecordComponent instance
3461   HandleMark hm(THREAD);
3462   InstanceKlass* ik = vmClasses::RecordComponent_klass();
3463   assert(ik != nullptr, "must be loaded");
3464   ik->initialize(CHECK_NULL);
3465 
3466   Handle element = ik->allocate_instance_handle(CHECK_NULL);
3467 
3468   Handle decl_class(THREAD, holder->java_mirror());
3469   java_lang_reflect_RecordComponent::set_clazz(element(), decl_class());
3470 
3471   Symbol* name = holder->constants()->symbol_at(component->name_index()); // name_index is a utf8
3472   oop component_name = StringTable::intern(name, CHECK_NULL);
3473   java_lang_reflect_RecordComponent::set_name(element(), component_name);
3474 
3475   Symbol* type = holder->constants()->symbol_at(component->descriptor_index());
3476   Handle component_type_h =
3477     SystemDictionary::find_java_mirror_for_type(type, holder, SignatureStream::NCDFError, CHECK_NULL);
3478   java_lang_reflect_RecordComponent::set_type(element(), component_type_h());
3479 
3480   Method* accessor_method = nullptr;
3481   {
3482     // Prepend "()" to type to create the full method signature.
3483     ResourceMark rm(THREAD);
3484     int sig_len = type->utf8_length() + 3; // "()" and null char
3485     char* sig = NEW_RESOURCE_ARRAY(char, sig_len);
3486     jio_snprintf(sig, sig_len, "%c%c%s", JVM_SIGNATURE_FUNC, JVM_SIGNATURE_ENDFUNC, type->as_C_string());
3487     TempNewSymbol full_sig = SymbolTable::new_symbol(sig);
3488     accessor_method = holder->find_instance_method(name, full_sig, Klass::PrivateLookupMode::find);
3489   }
3490 
3491   if (accessor_method != nullptr) {
3492     methodHandle method(THREAD, accessor_method);
3493     oop m = Reflection::new_method(method, false, CHECK_NULL);
3494     java_lang_reflect_RecordComponent::set_accessor(element(), m);
3495   } else {
3496     java_lang_reflect_RecordComponent::set_accessor(element(), nullptr);
3497   }
3498 
3499   int sig_index = component->generic_signature_index();
3500   if (sig_index > 0) {
3501     Symbol* sig = holder->constants()->symbol_at(sig_index); // sig_index is a utf8
3502     oop component_sig = StringTable::intern(sig, CHECK_NULL);
3503     java_lang_reflect_RecordComponent::set_signature(element(), component_sig);
3504   } else {
3505     java_lang_reflect_RecordComponent::set_signature(element(), nullptr);
3506   }
3507 
3508   typeArrayOop annotation_oop = Annotations::make_java_array(component->annotations(), CHECK_NULL);
3509   java_lang_reflect_RecordComponent::set_annotations(element(), annotation_oop);
3510 
3511   typeArrayOop type_annotation_oop = Annotations::make_java_array(component->type_annotations(), CHECK_NULL);
3512   java_lang_reflect_RecordComponent::set_typeAnnotations(element(), type_annotation_oop);
3513 
3514   return element();
3515 }
3516 
3517 int reflect_ConstantPool::_oop_offset;
3518 
3519 #define CONSTANTPOOL_FIELDS_DO(macro) \
3520   macro(_oop_offset, k, "constantPoolOop", object_signature, false)
3521 
3522 void reflect_ConstantPool::compute_offsets() {
3523   InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3524   // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
3525   CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3526 }
3527 
3528 #if INCLUDE_CDS
3529 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3530   CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3531 }
3532 #endif
3533 
3534 int java_lang_reflect_Parameter::_name_offset;
3535 int java_lang_reflect_Parameter::_modifiers_offset;
3536 int java_lang_reflect_Parameter::_index_offset;
3537 int java_lang_reflect_Parameter::_executable_offset;
3538 
3539 #define PARAMETER_FIELDS_DO(macro) \
3540   macro(_name_offset,        k, vmSymbols::name_name(),        string_signature, false); \
3541   macro(_modifiers_offset,   k, vmSymbols::modifiers_name(),   int_signature,    false); \
3542   macro(_index_offset,       k, vmSymbols::index_name(),       int_signature,    false); \
3543   macro(_executable_offset,  k, vmSymbols::executable_name(),  executable_signature, false)
3544 
3545 void java_lang_reflect_Parameter::compute_offsets() {
3546   InstanceKlass* k = vmClasses::reflect_Parameter_klass();
3547   PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3548 }
3549 
3550 #if INCLUDE_CDS
3551 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3552   PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3553 }
3554 #endif
3555 
3556 Handle java_lang_reflect_Parameter::create(TRAPS) {
3557   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3558   Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3559   Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3560   InstanceKlass* ik = InstanceKlass::cast(k);
3561   // Ensure it is initialized
3562   ik->initialize(CHECK_NH);
3563   return ik->allocate_instance_handle(THREAD);
3564 }
3565 
3566 oop java_lang_reflect_Parameter::name(oop param) {
3567   return param->obj_field(_name_offset);
3568 }
3569 
3570 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3571   param->obj_field_put(_name_offset, value);
3572 }
3573 
3574 int java_lang_reflect_Parameter::modifiers(oop param) {
3575   return param->int_field(_modifiers_offset);
3576 }
3577 
3578 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3579   param->int_field_put(_modifiers_offset, value);
3580 }
3581 
3582 int java_lang_reflect_Parameter::index(oop param) {
3583   return param->int_field(_index_offset);
3584 }
3585 
3586 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3587   param->int_field_put(_index_offset, value);
3588 }
3589 
3590 oop java_lang_reflect_Parameter::executable(oop param) {
3591   return param->obj_field(_executable_offset);
3592 }
3593 
3594 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3595   param->obj_field_put(_executable_offset, value);
3596 }
3597 
3598 // java_lang_Module
3599 
3600 int java_lang_Module::_loader_offset;
3601 int java_lang_Module::_name_offset;
3602 int java_lang_Module::_module_entry_offset;
3603 
3604 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3605   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3606   return JavaCalls::construct_new_instance(vmClasses::Module_klass(),
3607                           vmSymbols::java_lang_module_init_signature(),
3608                           loader, module_name, CHECK_NH);
3609 }
3610 
3611 #define MODULE_FIELDS_DO(macro) \
3612   macro(_loader_offset,  k, vmSymbols::loader_name(),  classloader_signature, false); \
3613   macro(_name_offset,    k, vmSymbols::name_name(),    string_signature,      false)
3614 
3615 void java_lang_Module::compute_offsets() {
3616   InstanceKlass* k = vmClasses::Module_klass();
3617   MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3618   MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3619 }
3620 
3621 #if INCLUDE_CDS
3622 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3623   MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3624   MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3625 }
3626 #endif
3627 
3628 oop java_lang_Module::loader(oop module) {
3629   return module->obj_field(_loader_offset);
3630 }
3631 
3632 void java_lang_Module::set_loader(oop module, oop value) {
3633   module->obj_field_put(_loader_offset, value);
3634 }
3635 
3636 oop java_lang_Module::name(oop module) {
3637   return module->obj_field(_name_offset);
3638 }
3639 
3640 void java_lang_Module::set_name(oop module, oop value) {
3641   module->obj_field_put(_name_offset, value);
3642 }
3643 
3644 ModuleEntry* java_lang_Module::module_entry_raw(oop module) {
3645   assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3646   assert(module != nullptr, "module can't be null");
3647   assert(oopDesc::is_oop(module), "module must be oop");
3648 
3649   ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3650   return module_entry;
3651 }
3652 
3653 ModuleEntry* java_lang_Module::module_entry(oop module) {
3654   ModuleEntry* module_entry = module_entry_raw(module);
3655   if (module_entry == nullptr) {
3656     // If the inject field containing the ModuleEntry* is null then return the
3657     // class loader's unnamed module.
3658     oop loader = java_lang_Module::loader(module);
3659     Handle h_loader = Handle(Thread::current(), loader);
3660     ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3661     return loader_cld->unnamed_module();
3662   }
3663   return module_entry;
3664 }
3665 
3666 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3667   assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3668   assert(module != nullptr, "module can't be null");
3669   assert(oopDesc::is_oop(module), "module must be oop");
3670   module->address_field_put(_module_entry_offset, (address)module_entry);
3671 }
3672 
3673 Handle reflect_ConstantPool::create(TRAPS) {
3674   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3675   InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3676   // Ensure it is initialized
3677   k->initialize(CHECK_NH);
3678   return k->allocate_instance_handle(THREAD);
3679 }
3680 
3681 
3682 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3683   oop mirror = value->pool_holder()->java_mirror();
3684   // Save the mirror to get back the constant pool.
3685   reflect->obj_field_put(_oop_offset, mirror);
3686 }
3687 
3688 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3689 
3690   oop mirror = reflect->obj_field(_oop_offset);
3691   Klass* k = java_lang_Class::as_Klass(mirror);
3692   assert(k->is_instance_klass(), "Must be");
3693 
3694   // Get the constant pool back from the klass.  Since class redefinition
3695   // merges the new constant pool into the old, this is essentially the
3696   // same constant pool as the original.  If constant pool merging is
3697   // no longer done in the future, this will have to change to save
3698   // the original.
3699   return InstanceKlass::cast(k)->constants();
3700 }
3701 
3702 
3703 // Support for java_lang_ref_Reference
3704 
3705 bool java_lang_ref_Reference::_offsets_initialized;
3706 
3707 int java_lang_ref_Reference::_referent_offset;
3708 int java_lang_ref_Reference::_queue_offset;
3709 int java_lang_ref_Reference::_next_offset;
3710 int java_lang_ref_Reference::_discovered_offset;
3711 
3712 #define REFERENCE_FIELDS_DO(macro) \
3713   macro(_referent_offset,   k, "referent", object_signature, false); \
3714   macro(_queue_offset,      k, "queue", referencequeue_signature, false); \
3715   macro(_next_offset,       k, "next", reference_signature, false); \
3716   macro(_discovered_offset, k, "discovered", reference_signature, false);
3717 
3718 void java_lang_ref_Reference::compute_offsets() {
3719   if (_offsets_initialized) {
3720     return;
3721   }
3722   _offsets_initialized = true;
3723   InstanceKlass* k = vmClasses::Reference_klass();
3724   REFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3725 }
3726 
3727 #if INCLUDE_CDS
3728 void java_lang_ref_Reference::serialize_offsets(SerializeClosure* f) {
3729   f->do_bool(&_offsets_initialized);
3730   REFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3731 }
3732 #endif
3733 
3734 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
3735   assert(obj != nullptr, "sanity");
3736   if (offset != _referent_offset) {
3737     return false;
3738   }
3739 
3740   Klass* k = obj->klass();
3741   if (!k->is_instance_klass()) {
3742     return false;
3743   }
3744 
3745   InstanceKlass* ik = InstanceKlass::cast(obj->klass());
3746   bool is_reference = ik->reference_type() != REF_NONE;
3747   assert(!is_reference || ik->is_subclass_of(vmClasses::Reference_klass()), "sanity");
3748   return is_reference;
3749 }
3750 
3751 int java_lang_boxing_object::_value_offset;
3752 int java_lang_boxing_object::_long_value_offset;
3753 
3754 #define BOXING_FIELDS_DO(macro) \
3755   macro(_value_offset,      integerKlass, "value", int_signature, false); \
3756   macro(_long_value_offset, longKlass, "value", long_signature, false);
3757 
3758 void java_lang_boxing_object::compute_offsets() {
3759   InstanceKlass* integerKlass = vmClasses::Integer_klass();
3760   InstanceKlass* longKlass = vmClasses::Long_klass();
3761   BOXING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3762 }
3763 
3764 #if INCLUDE_CDS
3765 void java_lang_boxing_object::serialize_offsets(SerializeClosure* f) {
3766   BOXING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3767 }
3768 #endif
3769 
3770 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
3771   Klass* k = vmClasses::box_klass(type);
3772   if (k == nullptr)  return nullptr;
3773   InstanceKlass* ik = InstanceKlass::cast(k);
3774   if (!ik->is_initialized()) {
3775     ik->initialize(CHECK_NULL);
3776   }
3777   return ik->allocate_instance(THREAD);
3778 }
3779 
3780 
3781 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
3782   oop box = initialize_and_allocate(type, CHECK_NULL);
3783   if (box == nullptr)  return nullptr;
3784   switch (type) {
3785     case T_BOOLEAN:
3786       box->bool_field_put(_value_offset, value->z);
3787       break;
3788     case T_CHAR:
3789       box->char_field_put(_value_offset, value->c);
3790       break;
3791     case T_FLOAT:
3792       box->float_field_put(_value_offset, value->f);
3793       break;
3794     case T_DOUBLE:
3795       box->double_field_put(_long_value_offset, value->d);
3796       break;
3797     case T_BYTE:
3798       box->byte_field_put(_value_offset, value->b);
3799       break;
3800     case T_SHORT:
3801       box->short_field_put(_value_offset, value->s);
3802       break;
3803     case T_INT:
3804       box->int_field_put(_value_offset, value->i);
3805       break;
3806     case T_LONG:
3807       box->long_field_put(_long_value_offset, value->j);
3808       break;
3809     default:
3810       return nullptr;
3811   }
3812   return box;
3813 }
3814 
3815 
3816 BasicType java_lang_boxing_object::basic_type(oop box) {
3817   if (box == nullptr)  return T_ILLEGAL;
3818   BasicType type = vmClasses::box_klass_type(box->klass());
3819   if (type == T_OBJECT)         // 'unknown' value returned by SD::bkt
3820     return T_ILLEGAL;
3821   return type;
3822 }
3823 
3824 
3825 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
3826   BasicType type = vmClasses::box_klass_type(box->klass());
3827   switch (type) {
3828   case T_BOOLEAN:
3829     value->z = box->bool_field(_value_offset);
3830     break;
3831   case T_CHAR:
3832     value->c = box->char_field(_value_offset);
3833     break;
3834   case T_FLOAT:
3835     value->f = box->float_field(_value_offset);
3836     break;
3837   case T_DOUBLE:
3838     value->d = box->double_field(_long_value_offset);
3839     break;
3840   case T_BYTE:
3841     value->b = box->byte_field(_value_offset);
3842     break;
3843   case T_SHORT:
3844     value->s = box->short_field(_value_offset);
3845     break;
3846   case T_INT:
3847     value->i = box->int_field(_value_offset);
3848     break;
3849   case T_LONG:
3850     value->j = box->long_field(_long_value_offset);
3851     break;
3852   default:
3853     return T_ILLEGAL;
3854   } // end switch
3855   return type;
3856 }
3857 
3858 
3859 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
3860   BasicType type = vmClasses::box_klass_type(box->klass());
3861   switch (type) {
3862   case T_BOOLEAN:
3863     box->bool_field_put(_value_offset, value->z);
3864     break;
3865   case T_CHAR:
3866     box->char_field_put(_value_offset, value->c);
3867     break;
3868   case T_FLOAT:
3869     box->float_field_put(_value_offset, value->f);
3870     break;
3871   case T_DOUBLE:
3872     box->double_field_put(_long_value_offset, value->d);
3873     break;
3874   case T_BYTE:
3875     box->byte_field_put(_value_offset, value->b);
3876     break;
3877   case T_SHORT:
3878     box->short_field_put(_value_offset, value->s);
3879     break;
3880   case T_INT:
3881     box->int_field_put(_value_offset, value->i);
3882     break;
3883   case T_LONG:
3884     box->long_field_put(_long_value_offset, value->j);
3885     break;
3886   default:
3887     return T_ILLEGAL;
3888   } // end switch
3889   return type;
3890 }
3891 
3892 
3893 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
3894   switch (type) {
3895   case T_BOOLEAN:   st->print("%s", value->z ? "true" : "false");   break;
3896   case T_CHAR:      st->print("%d", value->c);                      break;
3897   case T_BYTE:      st->print("%d", value->b);                      break;
3898   case T_SHORT:     st->print("%d", value->s);                      break;
3899   case T_INT:       st->print("%d", value->i);                      break;
3900   case T_LONG:      st->print(JLONG_FORMAT, value->j);              break;
3901   case T_FLOAT:     st->print("%f", value->f);                      break;
3902   case T_DOUBLE:    st->print("%lf", value->d);                     break;
3903   default:          st->print("type %d?", type);                    break;
3904   }
3905 }
3906 
3907 
3908 // Support for java_lang_ref_SoftReference
3909 //
3910 
3911 int java_lang_ref_SoftReference::_timestamp_offset;
3912 int java_lang_ref_SoftReference::_static_clock_offset;
3913 
3914 #define SOFTREFERENCE_FIELDS_DO(macro) \
3915   macro(_timestamp_offset,    k, "timestamp", long_signature, false); \
3916   macro(_static_clock_offset, k, "clock",     long_signature, true)
3917 
3918 void java_lang_ref_SoftReference::compute_offsets() {
3919   InstanceKlass* k = vmClasses::SoftReference_klass();
3920   SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3921 }
3922 
3923 #if INCLUDE_CDS
3924 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
3925   SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3926 }
3927 #endif
3928 
3929 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
3930   return ref->long_field(_timestamp_offset);
3931 }
3932 
3933 jlong java_lang_ref_SoftReference::clock() {
3934   InstanceKlass* ik = vmClasses::SoftReference_klass();
3935   oop base = ik->static_field_base_raw();
3936   return base->long_field(_static_clock_offset);
3937 }
3938 
3939 void java_lang_ref_SoftReference::set_clock(jlong value) {
3940   InstanceKlass* ik = vmClasses::SoftReference_klass();
3941   oop base = ik->static_field_base_raw();
3942   base->long_field_put(_static_clock_offset, value);
3943 }
3944 
3945 // Support for java_lang_invoke_DirectMethodHandle
3946 
3947 int java_lang_invoke_DirectMethodHandle::_member_offset;
3948 
3949 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
3950   oop member_name = nullptr;
3951   assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
3952          "a DirectMethodHandle oop is expected");
3953   return dmh->obj_field(_member_offset);
3954 }
3955 
3956 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
3957   macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
3958 
3959 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
3960   InstanceKlass* k = vmClasses::DirectMethodHandle_klass();
3961   DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3962 }
3963 
3964 #if INCLUDE_CDS
3965 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
3966   DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3967 }
3968 #endif
3969 
3970 // Support for java_lang_invoke_MethodHandle
3971 
3972 int java_lang_invoke_MethodHandle::_type_offset;
3973 int java_lang_invoke_MethodHandle::_form_offset;
3974 
3975 int java_lang_invoke_MemberName::_clazz_offset;
3976 int java_lang_invoke_MemberName::_name_offset;
3977 int java_lang_invoke_MemberName::_type_offset;
3978 int java_lang_invoke_MemberName::_flags_offset;
3979 int java_lang_invoke_MemberName::_method_offset;
3980 int java_lang_invoke_MemberName::_vmindex_offset;
3981 
3982 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
3983 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
3984 
3985 int java_lang_invoke_LambdaForm::_vmentry_offset;
3986 
3987 #define METHODHANDLE_FIELDS_DO(macro) \
3988   macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
3989   macro(_form_offset, k, "form",                 java_lang_invoke_LambdaForm_signature, false)
3990 
3991 void java_lang_invoke_MethodHandle::compute_offsets() {
3992   InstanceKlass* k = vmClasses::MethodHandle_klass();
3993   METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3994 }
3995 
3996 #if INCLUDE_CDS
3997 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
3998   METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3999 }
4000 #endif
4001 
4002 #define MEMBERNAME_FIELDS_DO(macro) \
4003   macro(_clazz_offset,   k, vmSymbols::clazz_name(),   class_signature,  false); \
4004   macro(_name_offset,    k, vmSymbols::name_name(),    string_signature, false); \
4005   macro(_type_offset,    k, vmSymbols::type_name(),    object_signature, false); \
4006   macro(_flags_offset,   k, vmSymbols::flags_name(),   int_signature,    false); \
4007   macro(_method_offset,  k, vmSymbols::method_name(),  java_lang_invoke_ResolvedMethodName_signature, false)
4008 
4009 void java_lang_invoke_MemberName::compute_offsets() {
4010   InstanceKlass* k = vmClasses::MemberName_klass();
4011   MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4012   MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4013 }
4014 
4015 #if INCLUDE_CDS
4016 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
4017   MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4018   MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4019 }
4020 #endif
4021 
4022 #define RESOLVEDMETHOD_FIELDS_DO(macro) \
4023   macro(_vmholder_offset, k, "vmholder", class_signature, false)
4024 
4025 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
4026   InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4027   assert(k != nullptr, "jdk mismatch");
4028   RESOLVEDMETHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4029   RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4030 }
4031 
4032 #if INCLUDE_CDS
4033 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
4034   RESOLVEDMETHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4035   RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4036 }
4037 #endif
4038 
4039 #define LAMBDAFORM_FIELDS_DO(macro) \
4040   macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
4041 
4042 void java_lang_invoke_LambdaForm::compute_offsets() {
4043   InstanceKlass* k = vmClasses::LambdaForm_klass();
4044   assert (k != nullptr, "jdk mismatch");
4045   LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4046 }
4047 
4048 #if INCLUDE_CDS
4049 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
4050   LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4051 }
4052 #endif
4053 
4054 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
4055   return obj != nullptr && is_subclass(obj->klass());
4056 }
4057 
4058 int jdk_internal_foreign_abi_NativeEntryPoint::_method_type_offset;
4059 int jdk_internal_foreign_abi_NativeEntryPoint::_downcall_stub_address_offset;
4060 
4061 #define NEP_FIELDS_DO(macro) \
4062   macro(_method_type_offset,           k, "methodType",          java_lang_invoke_MethodType_signature, false); \
4063   macro(_downcall_stub_address_offset, k, "downcallStubAddress", long_signature, false);
4064 
4065 bool jdk_internal_foreign_abi_NativeEntryPoint::is_instance(oop obj) {
4066   return obj != nullptr && is_subclass(obj->klass());
4067 }
4068 
4069 void jdk_internal_foreign_abi_NativeEntryPoint::compute_offsets() {
4070   InstanceKlass* k = vmClasses::NativeEntryPoint_klass();
4071   NEP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4072 }
4073 
4074 #if INCLUDE_CDS
4075 void jdk_internal_foreign_abi_NativeEntryPoint::serialize_offsets(SerializeClosure* f) {
4076   NEP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4077 }
4078 #endif
4079 
4080 oop jdk_internal_foreign_abi_NativeEntryPoint::method_type(oop entry) {
4081   return entry->obj_field(_method_type_offset);
4082 }
4083 
4084 jlong jdk_internal_foreign_abi_NativeEntryPoint::downcall_stub_address(oop entry) {
4085   return entry->long_field(_downcall_stub_address_offset);
4086 }
4087 
4088 int jdk_internal_foreign_abi_ABIDescriptor::_inputStorage_offset;
4089 int jdk_internal_foreign_abi_ABIDescriptor::_outputStorage_offset;
4090 int jdk_internal_foreign_abi_ABIDescriptor::_volatileStorage_offset;
4091 int jdk_internal_foreign_abi_ABIDescriptor::_stackAlignment_offset;
4092 int jdk_internal_foreign_abi_ABIDescriptor::_shadowSpace_offset;
4093 int jdk_internal_foreign_abi_ABIDescriptor::_scratch1_offset;
4094 int jdk_internal_foreign_abi_ABIDescriptor::_scratch2_offset;
4095 
4096 #define ABIDescriptor_FIELDS_DO(macro) \
4097   macro(_inputStorage_offset,    k, "inputStorage",    jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4098   macro(_outputStorage_offset,   k, "outputStorage",   jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4099   macro(_volatileStorage_offset, k, "volatileStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4100   macro(_stackAlignment_offset,  k, "stackAlignment",  int_signature, false); \
4101   macro(_shadowSpace_offset,     k, "shadowSpace",     int_signature, false); \
4102   macro(_scratch1_offset,        k, "scratch1",        jdk_internal_foreign_abi_VMStorage_signature, false); \
4103   macro(_scratch2_offset,        k, "scratch2",        jdk_internal_foreign_abi_VMStorage_signature, false);
4104 
4105 bool jdk_internal_foreign_abi_ABIDescriptor::is_instance(oop obj) {
4106   return obj != nullptr && is_subclass(obj->klass());
4107 }
4108 
4109 void jdk_internal_foreign_abi_ABIDescriptor::compute_offsets() {
4110   InstanceKlass* k = vmClasses::ABIDescriptor_klass();
4111   ABIDescriptor_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4112 }
4113 
4114 #if INCLUDE_CDS
4115 void jdk_internal_foreign_abi_ABIDescriptor::serialize_offsets(SerializeClosure* f) {
4116   ABIDescriptor_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4117 }
4118 #endif
4119 
4120 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::inputStorage(oop entry) {
4121   return oop_cast<objArrayOop>(entry->obj_field(_inputStorage_offset));
4122 }
4123 
4124 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::outputStorage(oop entry) {
4125   return oop_cast<objArrayOop>(entry->obj_field(_outputStorage_offset));
4126 }
4127 
4128 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::volatileStorage(oop entry) {
4129   return oop_cast<objArrayOop>(entry->obj_field(_volatileStorage_offset));
4130 }
4131 
4132 jint jdk_internal_foreign_abi_ABIDescriptor::stackAlignment(oop entry) {
4133   return entry->int_field(_stackAlignment_offset);
4134 }
4135 
4136 jint jdk_internal_foreign_abi_ABIDescriptor::shadowSpace(oop entry) {
4137   return entry->int_field(_shadowSpace_offset);
4138 }
4139 
4140 oop jdk_internal_foreign_abi_ABIDescriptor::scratch1(oop entry) {
4141   return entry->obj_field(_scratch1_offset);
4142 }
4143 
4144 oop jdk_internal_foreign_abi_ABIDescriptor::scratch2(oop entry) {
4145   return entry->obj_field(_scratch2_offset);
4146 }
4147 
4148 int jdk_internal_foreign_abi_VMStorage::_type_offset;
4149 int jdk_internal_foreign_abi_VMStorage::_indexOrOffset_offset;
4150 int jdk_internal_foreign_abi_VMStorage::_segmentMaskOrSize_offset;
4151 int jdk_internal_foreign_abi_VMStorage::_debugName_offset;
4152 
4153 #define VMStorage_FIELDS_DO(macro) \
4154   macro(_type_offset,              k, "type",              byte_signature, false); \
4155   macro(_indexOrOffset_offset,     k, "indexOrOffset",     int_signature, false); \
4156   macro(_segmentMaskOrSize_offset, k, "segmentMaskOrSize", short_signature, false); \
4157   macro(_debugName_offset,         k, "debugName",         string_signature, false); \
4158 
4159 bool jdk_internal_foreign_abi_VMStorage::is_instance(oop obj) {
4160   return obj != nullptr && is_subclass(obj->klass());
4161 }
4162 
4163 void jdk_internal_foreign_abi_VMStorage::compute_offsets() {
4164   InstanceKlass* k = vmClasses::VMStorage_klass();
4165   VMStorage_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4166 }
4167 
4168 #if INCLUDE_CDS
4169 void jdk_internal_foreign_abi_VMStorage::serialize_offsets(SerializeClosure* f) {
4170   VMStorage_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4171 }
4172 #endif
4173 
4174 jbyte jdk_internal_foreign_abi_VMStorage::type(oop entry) {
4175   return entry->byte_field(_type_offset);
4176 }
4177 
4178 jint jdk_internal_foreign_abi_VMStorage::index_or_offset(oop entry) {
4179   return entry->int_field(_indexOrOffset_offset);
4180 }
4181 
4182 jshort jdk_internal_foreign_abi_VMStorage::segment_mask_or_size(oop entry) {
4183   return entry->short_field(_segmentMaskOrSize_offset);
4184 }
4185 
4186 oop jdk_internal_foreign_abi_VMStorage::debugName(oop entry) {
4187   return entry->obj_field(_debugName_offset);
4188 }
4189 
4190 int jdk_internal_foreign_abi_CallConv::_argRegs_offset;
4191 int jdk_internal_foreign_abi_CallConv::_retRegs_offset;
4192 
4193 #define CallConv_FIELDS_DO(macro) \
4194   macro(_argRegs_offset, k, "argRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4195   macro(_retRegs_offset, k, "retRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4196 
4197 bool jdk_internal_foreign_abi_CallConv::is_instance(oop obj) {
4198   return obj != nullptr && is_subclass(obj->klass());
4199 }
4200 
4201 void jdk_internal_foreign_abi_CallConv::compute_offsets() {
4202   InstanceKlass* k = vmClasses::CallConv_klass();
4203   CallConv_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4204 }
4205 
4206 #if INCLUDE_CDS
4207 void jdk_internal_foreign_abi_CallConv::serialize_offsets(SerializeClosure* f) {
4208   CallConv_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4209 }
4210 #endif
4211 
4212 objArrayOop jdk_internal_foreign_abi_CallConv::argRegs(oop entry) {
4213   return oop_cast<objArrayOop>(entry->obj_field(_argRegs_offset));
4214 }
4215 
4216 objArrayOop jdk_internal_foreign_abi_CallConv::retRegs(oop entry) {
4217   return oop_cast<objArrayOop>(entry->obj_field(_retRegs_offset));
4218 }
4219 
4220 oop java_lang_invoke_MethodHandle::type(oop mh) {
4221   return mh->obj_field(_type_offset);
4222 }
4223 
4224 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
4225   mh->obj_field_put(_type_offset, mtype);
4226 }
4227 
4228 oop java_lang_invoke_MethodHandle::form(oop mh) {
4229   assert(_form_offset != 0, "");
4230   return mh->obj_field(_form_offset);
4231 }
4232 
4233 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
4234   assert(_form_offset != 0, "");
4235   mh->obj_field_put(_form_offset, lform);
4236 }
4237 
4238 /// MemberName accessors
4239 
4240 oop java_lang_invoke_MemberName::clazz(oop mname) {
4241   assert(is_instance(mname), "wrong type");
4242   return mname->obj_field(_clazz_offset);
4243 }
4244 
4245 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
4246   assert(is_instance(mname), "wrong type");
4247   mname->obj_field_put(_clazz_offset, clazz);
4248 }
4249 
4250 oop java_lang_invoke_MemberName::name(oop mname) {
4251   assert(is_instance(mname), "wrong type");
4252   return mname->obj_field(_name_offset);
4253 }
4254 
4255 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
4256   assert(is_instance(mname), "wrong type");
4257   mname->obj_field_put(_name_offset, name);
4258 }
4259 
4260 oop java_lang_invoke_MemberName::type(oop mname) {
4261   assert(is_instance(mname), "wrong type");
4262   return mname->obj_field(_type_offset);
4263 }
4264 
4265 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
4266   assert(is_instance(mname), "wrong type");
4267   mname->obj_field_put(_type_offset, type);
4268 }
4269 
4270 int java_lang_invoke_MemberName::flags(oop mname) {
4271   assert(is_instance(mname), "wrong type");
4272   return mname->int_field(_flags_offset);
4273 }
4274 
4275 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
4276   assert(is_instance(mname), "wrong type");
4277   mname->int_field_put(_flags_offset, flags);
4278 }
4279 
4280 
4281 // Return vmtarget from ResolvedMethodName method field through indirection
4282 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
4283   assert(is_instance(mname), "wrong type");
4284   oop method = mname->obj_field(_method_offset);
4285   return method == nullptr ? nullptr : java_lang_invoke_ResolvedMethodName::vmtarget(method);
4286 }
4287 
4288 bool java_lang_invoke_MemberName::is_method(oop mname) {
4289   assert(is_instance(mname), "must be MemberName");
4290   return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
4291 }
4292 
4293 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
4294   assert(is_instance(mname), "wrong type");
4295   mname->obj_field_put(_method_offset, resolved_method);
4296 }
4297 
4298 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
4299   assert(is_instance(mname), "wrong type");
4300   return (intptr_t) mname->address_field(_vmindex_offset);
4301 }
4302 
4303 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
4304   assert(is_instance(mname), "wrong type");
4305   mname->address_field_put(_vmindex_offset, (address) index);
4306 }
4307 
4308 
4309 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
4310   assert(is_instance(resolved_method), "wrong type");
4311   Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
4312   assert(m->is_method(), "must be");
4313   return m;
4314 }
4315 
4316 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
4317 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
4318   assert(is_instance(resolved_method), "wrong type");
4319   resolved_method->address_field_put(_vmtarget_offset, (address)m);
4320 }
4321 
4322 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) {
4323   assert(is_instance(resolved_method), "wrong type");
4324   resolved_method->obj_field_put(_vmholder_offset, holder);
4325 }
4326 
4327 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
4328   const Method* method = m();
4329 
4330   // lookup ResolvedMethod oop in the table, or create a new one and intern it
4331   oop resolved_method = ResolvedMethodTable::find_method(method);
4332   if (resolved_method != nullptr) {
4333     return resolved_method;
4334   }
4335 
4336   InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4337   if (!k->is_initialized()) {
4338     k->initialize(CHECK_NULL);
4339   }
4340 
4341   oop new_resolved_method = k->allocate_instance(CHECK_NULL);
4342 
4343   NoSafepointVerifier nsv;
4344 
4345   if (method->is_old()) {
4346     method = (method->is_deleted()) ? Universe::throw_no_such_method_error() :
4347                                       method->get_new_method();
4348   }
4349 
4350   InstanceKlass* holder = method->method_holder();
4351 
4352   set_vmtarget(new_resolved_method, const_cast<Method*>(method));
4353   // Add a reference to the loader (actually mirror because hidden classes may not have
4354   // distinct loaders) to ensure the metadata is kept alive.
4355   // This mirror may be different than the one in clazz field.
4356   set_vmholder(new_resolved_method, holder->java_mirror());
4357 
4358   // Set flag in class to indicate this InstanceKlass has entries in the table
4359   // to avoid walking table during redefinition if none of the redefined classes
4360   // have any membernames in the table.
4361   holder->set_has_resolved_methods();
4362 
4363   return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method));
4364 }
4365 
4366 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
4367   assert(is_instance(lform), "wrong type");
4368   return lform->obj_field(_vmentry_offset);
4369 }
4370 
4371 
4372 // Support for java_lang_invoke_MethodType
4373 
4374 int java_lang_invoke_MethodType::_rtype_offset;
4375 int java_lang_invoke_MethodType::_ptypes_offset;
4376 
4377 #define METHODTYPE_FIELDS_DO(macro) \
4378   macro(_rtype_offset,  k, "rtype",  class_signature,       false); \
4379   macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
4380 
4381 void java_lang_invoke_MethodType::compute_offsets() {
4382   InstanceKlass* k = vmClasses::MethodType_klass();
4383   METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4384 }
4385 
4386 #if INCLUDE_CDS
4387 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
4388   METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4389 }
4390 #endif
4391 
4392 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
4393   st->print("(");
4394   objArrayOop pts = ptypes(mt);
4395   if (pts != nullptr) {
4396     for (int i = 0, limit = pts->length(); i < limit; i++) {
4397       java_lang_Class::print_signature(pts->obj_at(i), st);
4398     }
4399   } else {
4400     st->print("null");
4401   }
4402   st->print(")");
4403   oop rt = rtype(mt);
4404   if (rt != nullptr) {
4405     java_lang_Class::print_signature(rt, st);
4406   } else {
4407     st->print("null");
4408   }
4409 }
4410 
4411 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) {
4412   ResourceMark rm;
4413   stringStream buffer(128);
4414   print_signature(mt, &buffer);
4415   const char* sigstr =       buffer.base();
4416   int         siglen = (int) buffer.size();
4417   Symbol *name;
4418   if (!intern_if_not_found) {
4419     name = SymbolTable::probe(sigstr, siglen);
4420   } else {
4421     name = SymbolTable::new_symbol(sigstr, siglen);
4422   }
4423   return name;
4424 }
4425 
4426 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
4427   if (mt1 == mt2)
4428     return true;
4429   if (rtype(mt1) != rtype(mt2))
4430     return false;
4431   if (ptype_count(mt1) != ptype_count(mt2))
4432     return false;
4433   for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
4434     if (ptype(mt1, i) != ptype(mt2, i))
4435       return false;
4436   }
4437   return true;
4438 }
4439 
4440 oop java_lang_invoke_MethodType::rtype(oop mt) {
4441   assert(is_instance(mt), "must be a MethodType");
4442   return mt->obj_field(_rtype_offset);
4443 }
4444 
4445 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
4446   assert(is_instance(mt), "must be a MethodType");
4447   return (objArrayOop) mt->obj_field(_ptypes_offset);
4448 }
4449 
4450 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
4451   return ptypes(mt)->obj_at(idx);
4452 }
4453 
4454 int java_lang_invoke_MethodType::ptype_count(oop mt) {
4455   return ptypes(mt)->length();
4456 }
4457 
4458 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
4459   objArrayOop pts = ptypes(mt);
4460   int count = pts->length();
4461   int slots = 0;
4462   for (int i = 0; i < count; i++) {
4463     BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
4464     slots += type2size[bt];
4465   }
4466   return slots;
4467 }
4468 
4469 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
4470   BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
4471   return type2size[bt];
4472 }
4473 
4474 
4475 // Support for java_lang_invoke_CallSite
4476 
4477 int java_lang_invoke_CallSite::_target_offset;
4478 int java_lang_invoke_CallSite::_context_offset;
4479 
4480 #define CALLSITE_FIELDS_DO(macro) \
4481   macro(_target_offset,  k, "target", java_lang_invoke_MethodHandle_signature, false); \
4482   macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false)
4483 
4484 void java_lang_invoke_CallSite::compute_offsets() {
4485   InstanceKlass* k = vmClasses::CallSite_klass();
4486   CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4487 }
4488 
4489 #if INCLUDE_CDS
4490 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
4491   CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4492 }
4493 #endif
4494 
4495 oop java_lang_invoke_CallSite::context_no_keepalive(oop call_site) {
4496   assert(java_lang_invoke_CallSite::is_instance(call_site), "");
4497 
4498   oop dep_oop = call_site->obj_field_access<AS_NO_KEEPALIVE>(_context_offset);
4499   return dep_oop;
4500 }
4501 
4502 // Support for java_lang_invoke_ConstantCallSite
4503 
4504 int java_lang_invoke_ConstantCallSite::_is_frozen_offset;
4505 
4506 #define CONSTANTCALLSITE_FIELDS_DO(macro) \
4507   macro(_is_frozen_offset, k, "isFrozen", bool_signature, false)
4508 
4509 void java_lang_invoke_ConstantCallSite::compute_offsets() {
4510   InstanceKlass* k = vmClasses::ConstantCallSite_klass();
4511   CONSTANTCALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4512 }
4513 
4514 #if INCLUDE_CDS
4515 void java_lang_invoke_ConstantCallSite::serialize_offsets(SerializeClosure* f) {
4516   CONSTANTCALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4517 }
4518 #endif
4519 
4520 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext
4521 
4522 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset;
4523 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_last_cleanup_offset;
4524 
4525 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() {
4526   InstanceKlass* k = vmClasses::Context_klass();
4527   CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4528 }
4529 
4530 #if INCLUDE_CDS
4531 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) {
4532   CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4533 }
4534 #endif
4535 
4536 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) {
4537   assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
4538   nmethodBucket* volatile* vmdeps_addr = call_site->field_addr<nmethodBucket* volatile>(_vmdependencies_offset);
4539   volatile uint64_t* last_cleanup_addr = call_site->field_addr<volatile uint64_t>(_last_cleanup_offset);
4540   DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr);
4541   return dep_ctx;
4542 }
4543 
4544 // Support for java_security_AccessControlContext
4545 
4546 int java_security_AccessControlContext::_context_offset;
4547 int java_security_AccessControlContext::_privilegedContext_offset;
4548 int java_security_AccessControlContext::_isPrivileged_offset;
4549 int java_security_AccessControlContext::_isAuthorized_offset;
4550 
4551 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \
4552   macro(_context_offset,           k, "context",      protectiondomain_signature, false); \
4553   macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \
4554   macro(_isPrivileged_offset,      k, "isPrivileged", bool_signature, false); \
4555   macro(_isAuthorized_offset,      k, "isAuthorized", bool_signature, false)
4556 
4557 void java_security_AccessControlContext::compute_offsets() {
4558   assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
4559   InstanceKlass* k = vmClasses::AccessControlContext_klass();
4560   ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4561 }
4562 
4563 #if INCLUDE_CDS
4564 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) {
4565   ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4566 }
4567 #endif
4568 
4569 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
4570   assert(_isPrivileged_offset != 0, "offsets should have been initialized");
4571   assert(_isAuthorized_offset != 0, "offsets should have been initialized");
4572   // Ensure klass is initialized
4573   vmClasses::AccessControlContext_klass()->initialize(CHECK_NULL);
4574   // Allocate result
4575   oop result = vmClasses::AccessControlContext_klass()->allocate_instance(CHECK_NULL);
4576   // Fill in values
4577   result->obj_field_put(_context_offset, context());
4578   result->obj_field_put(_privilegedContext_offset, privileged_context());
4579   result->bool_field_put(_isPrivileged_offset, isPrivileged);
4580   result->bool_field_put(_isAuthorized_offset, true);
4581   return result;
4582 }
4583 
4584 
4585 // Support for java_lang_ClassLoader
4586 
4587 int  java_lang_ClassLoader::_loader_data_offset;
4588 int  java_lang_ClassLoader::_parallelCapable_offset;
4589 int  java_lang_ClassLoader::_name_offset;
4590 int  java_lang_ClassLoader::_nameAndId_offset;
4591 int  java_lang_ClassLoader::_unnamedModule_offset;
4592 int  java_lang_ClassLoader::_parent_offset;
4593 
4594 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
4595   assert(loader != nullptr, "loader must not be null");
4596   assert(oopDesc::is_oop(loader), "loader must be oop");
4597   return Atomic::load_acquire(loader->field_addr<ClassLoaderData*>(_loader_data_offset));
4598 }
4599 
4600 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
4601   assert(loader != nullptr, "loader must not be null");
4602   assert(oopDesc::is_oop(loader), "loader must be oop");
4603   return *loader->field_addr<ClassLoaderData*>(_loader_data_offset);
4604 }
4605 
4606 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
4607   assert(loader != nullptr, "loader must not be null");
4608   assert(oopDesc::is_oop(loader), "loader must be oop");
4609   Atomic::release_store(loader->field_addr<ClassLoaderData*>(_loader_data_offset), new_data);
4610 }
4611 
4612 #define CLASSLOADER_FIELDS_DO(macro) \
4613   macro(_parallelCapable_offset, k1, "parallelLockMap",      concurrenthashmap_signature, false); \
4614   macro(_name_offset,            k1, vmSymbols::name_name(), string_signature, false); \
4615   macro(_nameAndId_offset,       k1, "nameAndId",            string_signature, false); \
4616   macro(_unnamedModule_offset,   k1, "unnamedModule",        module_signature, false); \
4617   macro(_parent_offset,          k1, "parent",               classloader_signature, false)
4618 
4619 void java_lang_ClassLoader::compute_offsets() {
4620   InstanceKlass* k1 = vmClasses::ClassLoader_klass();
4621   CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4622 
4623   CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4624 }
4625 
4626 #if INCLUDE_CDS
4627 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
4628   CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4629   CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4630 }
4631 #endif
4632 
4633 oop java_lang_ClassLoader::parent(oop loader) {
4634   assert(is_instance(loader), "loader must be oop");
4635   return loader->obj_field(_parent_offset);
4636 }
4637 
4638 oop java_lang_ClassLoader::parent_no_keepalive(oop loader) {
4639   assert(is_instance(loader), "loader must be oop");
4640   return loader->obj_field_access<AS_NO_KEEPALIVE>(_parent_offset);
4641 }
4642 
4643 // Returns the name field of this class loader.  If the name field has not
4644 // been set, null will be returned.
4645 oop java_lang_ClassLoader::name(oop loader) {
4646   assert(is_instance(loader), "loader must be oop");
4647   return loader->obj_field(_name_offset);
4648 }
4649 
4650 // Returns the nameAndId field of this class loader. The format is
4651 // as follows:
4652 //   If the defining loader has a name explicitly set then '<loader-name>' @<id>
4653 //   If the defining loader has no name then <qualified-class-name> @<id>
4654 //   If built-in loader, then omit '@<id>' as there is only one instance.
4655 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
4656 oop java_lang_ClassLoader::nameAndId(oop loader) {
4657   assert(is_instance(loader), "loader must be oop");
4658   return loader->obj_field(_nameAndId_offset);
4659 }
4660 
4661 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
4662   assert(is_instance(loader), "loader must be oop");
4663   assert(cl == nullptr || is_instance(cl), "cl argument must be oop");
4664   oop acl = loader;
4665   debug_only(jint loop_count = 0);
4666   // This loop taken verbatim from ClassLoader.java:
4667   do {
4668     acl = parent(acl);
4669     if (cl == acl) {
4670       return true;
4671     }
4672     assert(++loop_count > 0, "loop_count overflow");
4673   } while (acl != nullptr);
4674   return false;
4675 }
4676 
4677 bool java_lang_ClassLoader::is_instance(oop obj) {
4678   return obj != nullptr && is_subclass(obj->klass());
4679 }
4680 
4681 
4682 // For class loader classes, parallelCapable defined
4683 // based on non-null field
4684 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
4685 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
4686   assert(_parallelCapable_offset != 0, "offsets should have been initialized");
4687   return (class_loader->obj_field(_parallelCapable_offset) != nullptr);
4688 }
4689 
4690 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
4691   // Fix for 4474172; see evaluation for more details
4692   loader = non_reflection_class_loader(loader);
4693 
4694   oop cl = SystemDictionary::java_system_loader();
4695   while(cl != nullptr) {
4696     if (cl == loader) return true;
4697     cl = parent(cl);
4698   }
4699   return false;
4700 }
4701 
4702 // Return true if this is one of the class loaders associated with
4703 // the generated bytecodes for serialization constructor returned
4704 // by sun.reflect.ReflectionFactory::newConstructorForSerialization
4705 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) {
4706   if (loader != nullptr) {
4707     Klass* delegating_cl_class = vmClasses::reflect_DelegatingClassLoader_klass();
4708     // This might be null in non-1.4 JDKs
4709     return (delegating_cl_class != nullptr && loader->is_a(delegating_cl_class));
4710   }
4711   return false;
4712 }
4713 
4714 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
4715   // See whether this is one of the class loaders associated with
4716   // the generated bytecodes for reflection, and if so, "magically"
4717   // delegate to its parent to prevent class loading from occurring
4718   // in places where applications using reflection didn't expect it.
4719   if (is_reflection_class_loader(loader)) {
4720     return parent(loader);
4721   }
4722   return loader;
4723 }
4724 
4725 oop java_lang_ClassLoader::unnamedModule(oop loader) {
4726   assert(is_instance(loader), "loader must be oop");
4727   return loader->obj_field(_unnamedModule_offset);
4728 }
4729 
4730 // Support for java_lang_System
4731 //
4732 
4733 int java_lang_System::_static_in_offset;
4734 int java_lang_System::_static_out_offset;
4735 int java_lang_System::_static_err_offset;
4736 int java_lang_System::_static_security_offset;
4737 int java_lang_System::_static_allow_security_offset;
4738 int java_lang_System::_static_never_offset;
4739 
4740 #define SYSTEM_FIELDS_DO(macro) \
4741   macro(_static_in_offset,  k, "in",  input_stream_signature, true); \
4742   macro(_static_out_offset, k, "out", print_stream_signature, true); \
4743   macro(_static_err_offset, k, "err", print_stream_signature, true); \
4744   macro(_static_security_offset, k, "security", security_manager_signature, true); \
4745   macro(_static_allow_security_offset, k, "allowSecurityManager", int_signature, true); \
4746   macro(_static_never_offset, k, "NEVER", int_signature, true)
4747 
4748 void java_lang_System::compute_offsets() {
4749   InstanceKlass* k = vmClasses::System_klass();
4750   SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4751 }
4752 
4753 // This field tells us that a security manager can never be installed so we
4754 // can completely skip populating the ProtectionDomainCacheTable.
4755 bool java_lang_System::allow_security_manager() {
4756   static int initialized = false;
4757   static bool allowed = true; // default
4758   if (!initialized) {
4759     oop base = vmClasses::System_klass()->static_field_base_raw();
4760     int never = base->int_field(_static_never_offset);
4761     allowed = (base->int_field(_static_allow_security_offset) != never);
4762     initialized = true;
4763   }
4764   return allowed;
4765 }
4766 
4767 // This field tells us that a security manager is installed.
4768 bool java_lang_System::has_security_manager() {
4769   oop base = vmClasses::System_klass()->static_field_base_raw();
4770   return base->obj_field(_static_security_offset) != nullptr;
4771 }
4772 
4773 #if INCLUDE_CDS
4774 void java_lang_System::serialize_offsets(SerializeClosure* f) {
4775    SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4776 }
4777 #endif
4778 
4779 // Support for jdk_internal_misc_UnsafeConstants
4780 //
4781 class UnsafeConstantsFixup : public FieldClosure {
4782 private:
4783   int _address_size;
4784   int _page_size;
4785   bool _big_endian;
4786   bool _use_unaligned_access;
4787   int _data_cache_line_flush_size;
4788 public:
4789   UnsafeConstantsFixup() {
4790     // round up values for all static final fields
4791     _address_size = sizeof(void*);
4792     _page_size = AIX_ONLY(sysconf(_SC_PAGESIZE)) NOT_AIX((int)os::vm_page_size());
4793     _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true);
4794     _use_unaligned_access = UseUnalignedAccesses;
4795     _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size();
4796   }
4797 
4798   void do_field(fieldDescriptor* fd) {
4799     oop mirror = fd->field_holder()->java_mirror();
4800     assert(mirror != nullptr, "UnsafeConstants must have mirror already");
4801     assert(fd->field_holder() == vmClasses::UnsafeConstants_klass(), "Should be UnsafeConstants");
4802     assert(fd->is_final(), "fields of UnsafeConstants must be final");
4803     assert(fd->is_static(), "fields of UnsafeConstants must be static");
4804     if (fd->name() == vmSymbols::address_size_name()) {
4805       mirror->int_field_put(fd->offset(), _address_size);
4806     } else if (fd->name() == vmSymbols::page_size_name()) {
4807       mirror->int_field_put(fd->offset(), _page_size);
4808     } else if (fd->name() == vmSymbols::big_endian_name()) {
4809       mirror->bool_field_put(fd->offset(), _big_endian);
4810     } else if (fd->name() == vmSymbols::use_unaligned_access_name()) {
4811       mirror->bool_field_put(fd->offset(), _use_unaligned_access);
4812     } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) {
4813       mirror->int_field_put(fd->offset(), _data_cache_line_flush_size);
4814     } else {
4815       assert(false, "unexpected UnsafeConstants field");
4816     }
4817   }
4818 };
4819 
4820 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() {
4821   UnsafeConstantsFixup fixup;
4822   vmClasses::UnsafeConstants_klass()->do_local_static_fields(&fixup);
4823 }
4824 
4825 
4826 // java_lang_StackTraceElement
4827 
4828 int java_lang_StackTraceElement::_methodName_offset;
4829 int java_lang_StackTraceElement::_fileName_offset;
4830 int java_lang_StackTraceElement::_lineNumber_offset;
4831 int java_lang_StackTraceElement::_moduleName_offset;
4832 int java_lang_StackTraceElement::_moduleVersion_offset;
4833 int java_lang_StackTraceElement::_classLoaderName_offset;
4834 int java_lang_StackTraceElement::_declaringClass_offset;
4835 int java_lang_StackTraceElement::_declaringClassObject_offset;
4836 
4837 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4838   macro(_declaringClassObject_offset,  k, "declaringClassObject", class_signature, false); \
4839   macro(_classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4840   macro(_moduleName_offset,      k, "moduleName",      string_signature, false); \
4841   macro(_moduleVersion_offset,   k, "moduleVersion",   string_signature, false); \
4842   macro(_declaringClass_offset,  k, "declaringClass",  string_signature, false); \
4843   macro(_methodName_offset,      k, "methodName",      string_signature, false); \
4844   macro(_fileName_offset,        k, "fileName",        string_signature, false); \
4845   macro(_lineNumber_offset,      k, "lineNumber",      int_signature,    false)
4846 
4847 // Support for java_lang_StackTraceElement
4848 void java_lang_StackTraceElement::compute_offsets() {
4849   InstanceKlass* k = vmClasses::StackTraceElement_klass();
4850   STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4851 }
4852 
4853 #if INCLUDE_CDS
4854 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
4855   STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4856 }
4857 #endif
4858 
4859 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
4860   element->obj_field_put(_fileName_offset, value);
4861 }
4862 
4863 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
4864   element->obj_field_put(_declaringClass_offset, value);
4865 }
4866 
4867 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
4868   element->obj_field_put(_methodName_offset, value);
4869 }
4870 
4871 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
4872   element->int_field_put(_lineNumber_offset, value);
4873 }
4874 
4875 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
4876   element->obj_field_put(_moduleName_offset, value);
4877 }
4878 
4879 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
4880   element->obj_field_put(_moduleVersion_offset, value);
4881 }
4882 
4883 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
4884   element->obj_field_put(_classLoaderName_offset, value);
4885 }
4886 
4887 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
4888   element->obj_field_put(_declaringClassObject_offset, value);
4889 }
4890 
4891 
4892 // java_lang_AssertionStatusDirectives
4893 
4894 int java_lang_AssertionStatusDirectives::_classes_offset;
4895 int java_lang_AssertionStatusDirectives::_classEnabled_offset;
4896 int java_lang_AssertionStatusDirectives::_packages_offset;
4897 int java_lang_AssertionStatusDirectives::_packageEnabled_offset;
4898 int java_lang_AssertionStatusDirectives::_deflt_offset;
4899 
4900 // Support for java Assertions - java_lang_AssertionStatusDirectives.
4901 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
4902   macro(_classes_offset,        k, "classes",        string_array_signature, false); \
4903   macro(_classEnabled_offset,   k, "classEnabled",   bool_array_signature, false); \
4904   macro(_packages_offset,       k, "packages",       string_array_signature, false); \
4905   macro(_packageEnabled_offset, k, "packageEnabled", bool_array_signature,   false); \
4906   macro(_deflt_offset,          k, "deflt",          bool_signature,         false)
4907 
4908 void java_lang_AssertionStatusDirectives::compute_offsets() {
4909   InstanceKlass* k = vmClasses::AssertionStatusDirectives_klass();
4910   ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4911 }
4912 
4913 #if INCLUDE_CDS
4914 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
4915   ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4916 }
4917 #endif
4918 
4919 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
4920   o->obj_field_put(_classes_offset, val);
4921 }
4922 
4923 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
4924   o->obj_field_put(_classEnabled_offset, val);
4925 }
4926 
4927 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
4928   o->obj_field_put(_packages_offset, val);
4929 }
4930 
4931 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
4932   o->obj_field_put(_packageEnabled_offset, val);
4933 }
4934 
4935 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
4936   o->bool_field_put(_deflt_offset, val);
4937 }
4938 
4939 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
4940 
4941 #define AOS_FIELDS_DO(macro) \
4942   macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
4943 
4944 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
4945   InstanceKlass* k = vmClasses::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
4946   AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4947 }
4948 
4949 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
4950   assert(_owner_offset != 0, "Must be initialized");
4951   return obj->obj_field(_owner_offset);
4952 }
4953 
4954 #if INCLUDE_CDS
4955 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
4956   AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4957 }
4958 #endif
4959 
4960 int vector_VectorPayload::_payload_offset;
4961 
4962 #define VECTORPAYLOAD_FIELDS_DO(macro) \
4963   macro(_payload_offset, k, "payload", object_signature, false)
4964 
4965 void vector_VectorPayload::compute_offsets() {
4966   InstanceKlass* k = vmClasses::vector_VectorPayload_klass();
4967   VECTORPAYLOAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4968 }
4969 
4970 #if INCLUDE_CDS
4971 void vector_VectorPayload::serialize_offsets(SerializeClosure* f) {
4972   VECTORPAYLOAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4973 }
4974 #endif
4975 
4976 void vector_VectorPayload::set_payload(oop o, oop val) {
4977   o->obj_field_put(_payload_offset, val);
4978 }
4979 
4980 bool vector_VectorPayload::is_instance(oop obj) {
4981   return obj != nullptr && is_subclass(obj->klass());
4982 }
4983 
4984 int java_lang_Integer_IntegerCache::_static_cache_offset;
4985 int java_lang_Long_LongCache::_static_cache_offset;
4986 int java_lang_Character_CharacterCache::_static_cache_offset;
4987 int java_lang_Short_ShortCache::_static_cache_offset;
4988 int java_lang_Byte_ByteCache::_static_cache_offset;
4989 
4990 #define INTEGER_CACHE_FIELDS_DO(macro) \
4991   macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true)
4992 
4993 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) {
4994   guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
4995   INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4996 }
4997 
4998 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) {
4999   oop base = ik->static_field_base_raw();
5000   return objArrayOop(base->obj_field(_static_cache_offset));
5001 }
5002 
5003 Symbol* java_lang_Integer_IntegerCache::symbol() {
5004   return vmSymbols::java_lang_Integer_IntegerCache();
5005 }
5006 
5007 #if INCLUDE_CDS
5008 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) {
5009   INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5010 }
5011 #endif
5012 #undef INTEGER_CACHE_FIELDS_DO
5013 
5014 jint java_lang_Integer::value(oop obj) {
5015    jvalue v;
5016    java_lang_boxing_object::get_value(obj, &v);
5017    return v.i;
5018 }
5019 
5020 #define LONG_CACHE_FIELDS_DO(macro) \
5021   macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true)
5022 
5023 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) {
5024   guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5025   LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5026 }
5027 
5028 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) {
5029   oop base = ik->static_field_base_raw();
5030   return objArrayOop(base->obj_field(_static_cache_offset));
5031 }
5032 
5033 Symbol* java_lang_Long_LongCache::symbol() {
5034   return vmSymbols::java_lang_Long_LongCache();
5035 }
5036 
5037 #if INCLUDE_CDS
5038 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) {
5039   LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5040 }
5041 #endif
5042 #undef LONG_CACHE_FIELDS_DO
5043 
5044 jlong java_lang_Long::value(oop obj) {
5045    jvalue v;
5046    java_lang_boxing_object::get_value(obj, &v);
5047    return v.j;
5048 }
5049 
5050 #define CHARACTER_CACHE_FIELDS_DO(macro) \
5051   macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true)
5052 
5053 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) {
5054   guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5055   CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5056 }
5057 
5058 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) {
5059   oop base = ik->static_field_base_raw();
5060   return objArrayOop(base->obj_field(_static_cache_offset));
5061 }
5062 
5063 Symbol* java_lang_Character_CharacterCache::symbol() {
5064   return vmSymbols::java_lang_Character_CharacterCache();
5065 }
5066 
5067 #if INCLUDE_CDS
5068 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) {
5069   CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5070 }
5071 #endif
5072 #undef CHARACTER_CACHE_FIELDS_DO
5073 
5074 jchar java_lang_Character::value(oop obj) {
5075    jvalue v;
5076    java_lang_boxing_object::get_value(obj, &v);
5077    return v.c;
5078 }
5079 
5080 #define SHORT_CACHE_FIELDS_DO(macro) \
5081   macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true)
5082 
5083 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) {
5084   guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5085   SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5086 }
5087 
5088 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) {
5089   oop base = ik->static_field_base_raw();
5090   return objArrayOop(base->obj_field(_static_cache_offset));
5091 }
5092 
5093 Symbol* java_lang_Short_ShortCache::symbol() {
5094   return vmSymbols::java_lang_Short_ShortCache();
5095 }
5096 
5097 #if INCLUDE_CDS
5098 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) {
5099   SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5100 }
5101 #endif
5102 #undef SHORT_CACHE_FIELDS_DO
5103 
5104 jshort java_lang_Short::value(oop obj) {
5105    jvalue v;
5106    java_lang_boxing_object::get_value(obj, &v);
5107    return v.s;
5108 }
5109 
5110 #define BYTE_CACHE_FIELDS_DO(macro) \
5111   macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true)
5112 
5113 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) {
5114   guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5115   BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5116 }
5117 
5118 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) {
5119   oop base = ik->static_field_base_raw();
5120   return objArrayOop(base->obj_field(_static_cache_offset));
5121 }
5122 
5123 Symbol* java_lang_Byte_ByteCache::symbol() {
5124   return vmSymbols::java_lang_Byte_ByteCache();
5125 }
5126 
5127 #if INCLUDE_CDS
5128 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) {
5129   BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5130 }
5131 #endif
5132 #undef BYTE_CACHE_FIELDS_DO
5133 
5134 jbyte java_lang_Byte::value(oop obj) {
5135    jvalue v;
5136    java_lang_boxing_object::get_value(obj, &v);
5137    return v.b;
5138 }
5139 
5140 int java_lang_Boolean::_static_TRUE_offset;
5141 int java_lang_Boolean::_static_FALSE_offset;
5142 
5143 #define BOOLEAN_FIELDS_DO(macro) \
5144   macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \
5145   macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true)
5146 
5147 
5148 void java_lang_Boolean::compute_offsets(InstanceKlass *k) {
5149   guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5150   BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5151 }
5152 
5153 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) {
5154   oop base = ik->static_field_base_raw();
5155   return base->obj_field(_static_TRUE_offset);
5156 }
5157 
5158 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) {
5159   oop base = ik->static_field_base_raw();
5160   return base->obj_field(_static_FALSE_offset);
5161 }
5162 
5163 Symbol* java_lang_Boolean::symbol() {
5164   return vmSymbols::java_lang_Boolean();
5165 }
5166 
5167 #if INCLUDE_CDS
5168 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) {
5169   BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5170 }
5171 #endif
5172 #undef BOOLEAN_CACHE_FIELDS_DO
5173 
5174 jboolean java_lang_Boolean::value(oop obj) {
5175    jvalue v;
5176    java_lang_boxing_object::get_value(obj, &v);
5177    return v.z;
5178 }
5179 
5180 // java_lang_reflect_RecordComponent
5181 
5182 int java_lang_reflect_RecordComponent::_clazz_offset;
5183 int java_lang_reflect_RecordComponent::_name_offset;
5184 int java_lang_reflect_RecordComponent::_type_offset;
5185 int java_lang_reflect_RecordComponent::_accessor_offset;
5186 int java_lang_reflect_RecordComponent::_signature_offset;
5187 int java_lang_reflect_RecordComponent::_annotations_offset;
5188 int java_lang_reflect_RecordComponent::_typeAnnotations_offset;
5189 
5190 #define RECORDCOMPONENT_FIELDS_DO(macro) \
5191   macro(_clazz_offset,       k, "clazz",       class_signature,  false); \
5192   macro(_name_offset,        k, "name",        string_signature, false); \
5193   macro(_type_offset,        k, "type",        class_signature,  false); \
5194   macro(_accessor_offset,    k, "accessor",    reflect_method_signature, false); \
5195   macro(_signature_offset,   k, "signature",   string_signature, false); \
5196   macro(_annotations_offset, k, "annotations", byte_array_signature,     false); \
5197   macro(_typeAnnotations_offset, k, "typeAnnotations", byte_array_signature, false);
5198 
5199 // Support for java_lang_reflect_RecordComponent
5200 void java_lang_reflect_RecordComponent::compute_offsets() {
5201   InstanceKlass* k = vmClasses::RecordComponent_klass();
5202   RECORDCOMPONENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5203 }
5204 
5205 #if INCLUDE_CDS
5206 void java_lang_reflect_RecordComponent::serialize_offsets(SerializeClosure* f) {
5207   RECORDCOMPONENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5208 }
5209 #endif
5210 
5211 void java_lang_reflect_RecordComponent::set_clazz(oop element, oop value) {
5212   element->obj_field_put(_clazz_offset, value);
5213 }
5214 
5215 void java_lang_reflect_RecordComponent::set_name(oop element, oop value) {
5216   element->obj_field_put(_name_offset, value);
5217 }
5218 
5219 void java_lang_reflect_RecordComponent::set_type(oop element, oop value) {
5220   element->obj_field_put(_type_offset, value);
5221 }
5222 
5223 void java_lang_reflect_RecordComponent::set_accessor(oop element, oop value) {
5224   element->obj_field_put(_accessor_offset, value);
5225 }
5226 
5227 void java_lang_reflect_RecordComponent::set_signature(oop element, oop value) {
5228   element->obj_field_put(_signature_offset, value);
5229 }
5230 
5231 void java_lang_reflect_RecordComponent::set_annotations(oop element, oop value) {
5232   element->obj_field_put(_annotations_offset, value);
5233 }
5234 
5235 void java_lang_reflect_RecordComponent::set_typeAnnotations(oop element, oop value) {
5236   element->obj_field_put(_typeAnnotations_offset, value);
5237 }
5238 
5239 // java_lang_InternalError
5240 int java_lang_InternalError::_during_unsafe_access_offset;
5241 
5242 void java_lang_InternalError::set_during_unsafe_access(oop internal_error) {
5243   internal_error->bool_field_put(_during_unsafe_access_offset, true);
5244 }
5245 
5246 jboolean java_lang_InternalError::during_unsafe_access(oop internal_error) {
5247   return internal_error->bool_field(_during_unsafe_access_offset);
5248 }
5249 
5250 void java_lang_InternalError::compute_offsets() {
5251   INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
5252 }
5253 
5254 #if INCLUDE_CDS
5255 void java_lang_InternalError::serialize_offsets(SerializeClosure* f) {
5256   INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
5257 }
5258 #endif
5259 
5260 #define BASIC_JAVA_CLASSES_DO_PART1(f) \
5261   f(java_lang_Class) \
5262   f(java_lang_String) \
5263   f(java_lang_ref_Reference) \
5264   //end
5265 
5266 #define BASIC_JAVA_CLASSES_DO_PART2(f) \
5267   f(java_lang_System) \
5268   f(java_lang_ClassLoader) \
5269   f(java_lang_Throwable) \
5270   f(java_lang_Thread) \
5271   f(java_lang_Thread_FieldHolder) \
5272   f(java_lang_Thread_Constants) \
5273   f(java_lang_ThreadGroup) \
5274   f(java_lang_VirtualThread) \
5275   f(java_lang_InternalError) \
5276   f(java_lang_AssertionStatusDirectives) \
5277   f(java_lang_ref_SoftReference) \
5278   f(java_lang_invoke_MethodHandle) \
5279   f(java_lang_invoke_DirectMethodHandle) \
5280   f(java_lang_invoke_MemberName) \
5281   f(java_lang_invoke_ResolvedMethodName) \
5282   f(java_lang_invoke_LambdaForm) \
5283   f(java_lang_invoke_MethodType) \
5284   f(java_lang_invoke_CallSite) \
5285   f(java_lang_invoke_ConstantCallSite) \
5286   f(java_lang_invoke_MethodHandleNatives_CallSiteContext) \
5287   f(java_security_AccessControlContext) \
5288   f(java_lang_reflect_AccessibleObject) \
5289   f(java_lang_reflect_Method) \
5290   f(java_lang_reflect_Constructor) \
5291   f(java_lang_reflect_Field) \
5292   f(java_lang_reflect_RecordComponent) \
5293   f(reflect_ConstantPool) \
5294   f(java_lang_reflect_Parameter) \
5295   f(java_lang_Module) \
5296   f(java_lang_StackTraceElement) \
5297   f(java_lang_ClassFrameInfo) \
5298   f(java_lang_StackFrameInfo) \
5299   f(java_lang_LiveStackFrameInfo) \
5300   f(jdk_internal_vm_ContinuationScope) \
5301   f(jdk_internal_vm_Continuation) \
5302   f(jdk_internal_vm_StackChunk) \
5303   f(java_util_concurrent_locks_AbstractOwnableSynchronizer) \
5304   f(jdk_internal_foreign_abi_NativeEntryPoint) \
5305   f(jdk_internal_foreign_abi_ABIDescriptor) \
5306   f(jdk_internal_foreign_abi_VMStorage) \
5307   f(jdk_internal_foreign_abi_CallConv) \
5308   f(jdk_internal_misc_UnsafeConstants) \
5309   f(java_lang_boxing_object) \
5310   f(vector_VectorPayload) \
5311   //end
5312 
5313 #define BASIC_JAVA_CLASSES_DO(f) \
5314         BASIC_JAVA_CLASSES_DO_PART1(f) \
5315         BASIC_JAVA_CLASSES_DO_PART2(f)
5316 
5317 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
5318 
5319 // Compute field offsets of all the classes in this file
5320 void JavaClasses::compute_offsets() {
5321   if (UseSharedSpaces) {
5322     JVMTI_ONLY(assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
5323                                                          JvmtiExport::has_early_class_hook_env()),
5324                       "JavaClasses::compute_offsets() must be called in early JVMTI phase."));
5325     // None of the classes used by the rest of this function can be replaced by
5326     // JVMTI ClassFileLoadHook.
5327     // We are safe to use the archived offsets, which have already been restored
5328     // by JavaClasses::serialize_offsets, without computing the offsets again.
5329     return;
5330   }
5331 
5332   // We have already called the compute_offsets() of the
5333   // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String, java_lang_Class and
5334   // java_lang_ref_Reference) earlier inside vmClasses::resolve_all()
5335   BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
5336 }
5337 
5338 #if INCLUDE_CDS
5339 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
5340 
5341 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
5342   BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
5343 }
5344 #endif
5345 
5346 #if INCLUDE_CDS_JAVA_HEAP
5347 bool JavaClasses::is_supported_for_archiving(oop obj) {
5348   Klass* klass = obj->klass();
5349 
5350   if (klass == vmClasses::ClassLoader_klass() ||  // ClassLoader::loader_data is malloc'ed.
5351       // The next 3 classes are used to implement java.lang.invoke, and are not used directly in
5352       // regular Java code. The implementation of java.lang.invoke uses generated hidden classes
5353       // (e.g., as referenced by ResolvedMethodName::vmholder) that are not yet supported by CDS.
5354       // So for now we cannot not support these classes for archiving.
5355       //
5356       // These objects typically are not referenced by static fields, but rather by resolved
5357       // constant pool entries, so excluding them shouldn't affect the archiving of static fields.
5358       klass == vmClasses::ResolvedMethodName_klass() ||
5359       klass == vmClasses::MemberName_klass() ||
5360       klass == vmClasses::Context_klass() ||
5361       // It's problematic to archive Reference objects. One of the reasons is that
5362       // Reference::discovered may pull in unwanted objects (see JDK-8284336)
5363       klass->is_subclass_of(vmClasses::Reference_klass())) {
5364     return false;
5365   }
5366 
5367   return true;
5368 }
5369 #endif
5370 
5371 #ifndef PRODUCT
5372 
5373 // These functions exist to assert the validity of de-serialized offsets in boxing object as a sanity check.
5374 
5375 bool JavaClasses::check_offset(const char *klass_name, int deserialized_offset, const char *field_name,
5376                                const char* field_sig) {
5377   EXCEPTION_MARK;
5378   fieldDescriptor fd;
5379   TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name);
5380   Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
5381   InstanceKlass* ik = InstanceKlass::cast(k);
5382   TempNewSymbol f_name = SymbolTable::new_symbol(field_name);
5383   TempNewSymbol f_sig  = SymbolTable::new_symbol(field_sig);
5384   if (!ik->find_local_field(f_name, f_sig, &fd)) {
5385     tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
5386     return false;
5387   }
5388   if (fd.is_static()) {
5389     tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
5390     return false;
5391   }
5392   if (fd.offset() == deserialized_offset ) {
5393     return true;
5394   } else {
5395     tty->print_cr("Offset of nonstatic field %s.%s is deserialized as %d but should really be %d.",
5396                   klass_name, field_name, deserialized_offset, fd.offset());
5397     return false;
5398   }
5399 }
5400 
5401 void JavaClasses::check_offsets() {
5402   bool valid = true;
5403 
5404 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5405   valid &= check_offset(klass_name, cpp_klass_name :: _##field_name ## _offset, #field_name, field_sig)
5406 
5407 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5408   valid &= check_offset(klass_name, cpp_klass_name :: _##long_ ## field_name ## _offset, #field_name, field_sig)
5409 
5410   // Boxed primitive objects (java_lang_boxing_object)
5411 
5412   CHECK_OFFSET("java/lang/Boolean",   java_lang_boxing_object, value, "Z");
5413   CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
5414   CHECK_OFFSET("java/lang/Float",     java_lang_boxing_object, value, "F");
5415   CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
5416   CHECK_OFFSET("java/lang/Byte",      java_lang_boxing_object, value, "B");
5417   CHECK_OFFSET("java/lang/Short",     java_lang_boxing_object, value, "S");
5418   CHECK_OFFSET("java/lang/Integer",   java_lang_boxing_object, value, "I");
5419   CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
5420 
5421   if (!valid) vm_exit_during_initialization("Field offset verification failed");
5422 }
5423 
5424 #endif // PRODUCT
5425 
5426 int InjectedField::compute_offset() {
5427   InstanceKlass* ik = InstanceKlass::cast(klass());
5428   for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5429     if (!may_be_java && !fs.field_flags().is_injected()) {
5430       // Only look at injected fields
5431       continue;
5432     }
5433     if (fs.name() == name() && fs.signature() == signature()) {
5434       return fs.offset();
5435     }
5436   }
5437   ResourceMark rm;
5438   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)" : "");
5439 #ifndef PRODUCT
5440   ik->print();
5441   tty->print_cr("all fields:");
5442   for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5443     tty->print_cr("  name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
5444   }
5445 #endif //PRODUCT
5446   vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
5447   return -1;
5448 }
5449 
5450 void javaClasses_init() {
5451   JavaClasses::compute_offsets();
5452   JavaClasses::check_offsets();
5453   FilteredFieldsMap::initialize();  // must be done after computing offsets.
5454 }