1 /*
   2  * Copyright (c) 1997, 2025, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "cds/aotReferenceObjSupport.hpp"
  26 #include "cds/archiveBuilder.hpp"
  27 #include "cds/archiveHeapLoader.hpp"
  28 #include "cds/cdsConfig.hpp"
  29 #include "cds/heapShared.hpp"
  30 #include "cds/metaspaceShared.hpp"
  31 #include "classfile/altHashing.hpp"
  32 #include "classfile/classLoaderData.inline.hpp"
  33 #include "classfile/javaClasses.inline.hpp"
  34 #include "classfile/javaClassesImpl.hpp"
  35 #include "classfile/javaThreadStatus.hpp"
  36 #include "classfile/moduleEntry.hpp"
  37 #include "classfile/stringTable.hpp"
  38 #include "classfile/symbolTable.hpp"
  39 #include "classfile/systemDictionary.hpp"
  40 #include "classfile/vmClasses.hpp"
  41 #include "classfile/vmSymbols.hpp"
  42 #include "code/debugInfo.hpp"
  43 #include "code/dependencyContext.hpp"
  44 #include "code/pcDesc.hpp"
  45 #include "gc/shared/collectedHeap.inline.hpp"
  46 #include "interpreter/interpreter.hpp"
  47 #include "interpreter/linkResolver.hpp"
  48 #include "jvm.h"
  49 #include "logging/log.hpp"
  50 #include "logging/logStream.hpp"
  51 #include "memory/oopFactory.hpp"
  52 #include "memory/resourceArea.hpp"
  53 #include "memory/universe.hpp"
  54 #include "oops/fieldInfo.hpp"
  55 #include "oops/fieldStreams.inline.hpp"
  56 #include "oops/instanceKlass.inline.hpp"
  57 #include "oops/instanceMirrorKlass.hpp"
  58 #include "oops/klass.hpp"
  59 #include "oops/klass.inline.hpp"
  60 #include "oops/method.inline.hpp"
  61 #include "oops/objArrayKlass.hpp"
  62 #include "oops/objArrayOop.inline.hpp"
  63 #include "oops/oopCast.inline.hpp"
  64 #include "oops/oop.inline.hpp"
  65 #include "oops/symbol.hpp"
  66 #include "oops/recordComponent.hpp"
  67 #include "oops/typeArrayOop.inline.hpp"
  68 #include "prims/jvmtiExport.hpp"
  69 #include "prims/jvmtiThreadState.hpp" // for JvmtiVTMSTransitionDisabler
  70 #include "prims/methodHandles.hpp"
  71 #include "prims/resolvedMethodTable.hpp"
  72 #include "runtime/continuationEntry.inline.hpp"
  73 #include "runtime/continuationJavaClasses.inline.hpp"
  74 #include "runtime/fieldDescriptor.inline.hpp"
  75 #include "runtime/frame.inline.hpp"
  76 #include "runtime/handles.inline.hpp"
  77 #include "runtime/handshake.hpp"
  78 #include "runtime/init.hpp"
  79 #include "runtime/interfaceSupport.inline.hpp"
  80 #include "runtime/java.hpp"
  81 #include "runtime/javaCalls.hpp"
  82 #include "runtime/javaThread.hpp"
  83 #include "runtime/jniHandles.inline.hpp"
  84 #include "runtime/reflectionUtils.hpp"
  85 #include "runtime/safepoint.hpp"
  86 #include "runtime/safepointVerifiers.hpp"
  87 #include "runtime/synchronizer.inline.hpp"
  88 #include "runtime/threadSMR.hpp"
  89 #include "runtime/vframe.inline.hpp"
  90 #include "runtime/vm_version.hpp"
  91 #include "utilities/align.hpp"
  92 #include "utilities/globalDefinitions.hpp"
  93 #include "utilities/growableArray.hpp"
  94 #include "utilities/preserveException.hpp"
  95 #include "utilities/utf8.hpp"
  96 #if INCLUDE_JVMCI
  97 #include "jvmci/jvmciJavaClasses.hpp"
  98 #endif
  99 
 100 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java)           \
 101   { VM_CLASS_ID(klass), VM_SYMBOL_ENUM_NAME(name##_name), VM_SYMBOL_ENUM_NAME(signature), may_be_java },
 102 
 103 InjectedField JavaClasses::_injected_fields[] = {
 104   ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
 105 };
 106 
 107 // Register native methods of Object
 108 void java_lang_Object::register_natives(TRAPS) {
 109   InstanceKlass* obj = vmClasses::Object_klass();
 110   Method::register_native(obj, vmSymbols::hashCode_name(),
 111                           vmSymbols::void_int_signature(), (address) &JVM_IHashCode, CHECK);
 112   Method::register_native(obj, vmSymbols::wait_name(),
 113                           vmSymbols::long_void_signature(), (address) &JVM_MonitorWait, CHECK);
 114   Method::register_native(obj, vmSymbols::notify_name(),
 115                           vmSymbols::void_method_signature(), (address) &JVM_MonitorNotify, CHECK);
 116   Method::register_native(obj, vmSymbols::notifyAll_name(),
 117                           vmSymbols::void_method_signature(), (address) &JVM_MonitorNotifyAll, CHECK);
 118   Method::register_native(obj, vmSymbols::clone_name(),
 119                           vmSymbols::void_object_signature(), (address) &JVM_Clone, THREAD);
 120 }
 121 
 122 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
 123   return _injected_fields[(int)id].compute_offset();
 124 }
 125 
 126 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
 127   *field_count = 0;
 128 
 129   vmSymbolID sid = vmSymbols::find_sid(class_name);
 130   if (sid == vmSymbolID::NO_SID) {
 131     // Only well known classes can inject fields
 132     return nullptr;
 133   }
 134 
 135   int count = 0;
 136   int start = -1;
 137 
 138 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
 139   if (sid == VM_SYMBOL_ENUM_NAME(klass)) {                         \
 140     count++;                                                       \
 141     if (start == -1) {                                             \
 142       start = (int)InjectedFieldID::klass##_##name##_enum;         \
 143     }                                                              \
 144   }
 145   ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
 146 #undef LOOKUP_INJECTED_FIELD
 147 
 148   if (start != -1) {
 149     *field_count = count;
 150     return _injected_fields + start;
 151   }
 152   return nullptr;
 153 }
 154 
 155 
 156 // Helpful routine for computing field offsets at run time rather than hardcoding them
 157 // Finds local fields only, including static fields.  Static field offsets are from the
 158 // beginning of the mirror.
 159 void JavaClasses::compute_offset(int &dest_offset,
 160                                  InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
 161                                  bool is_static) {
 162   fieldDescriptor fd;
 163   if (ik == nullptr) {
 164     ResourceMark rm;
 165     log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string());
 166     vm_exit_during_initialization("Invalid layout of well-known class");
 167   }
 168 
 169   if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) {
 170     ResourceMark rm;
 171     log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(),
 172                      name_symbol->as_C_string(), signature_symbol->as_C_string());
 173 #ifndef PRODUCT
 174     // Prints all fields and offsets
 175     Log(class) lt;
 176     LogStream ls(lt.error());
 177     ik->print_on(&ls);
 178 #endif //PRODUCT
 179     vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
 180   }
 181   dest_offset = fd.offset();
 182 }
 183 
 184 // Overloading to pass name as a string.
 185 void JavaClasses::compute_offset(int& dest_offset, InstanceKlass* ik,
 186                                  const char* name_string, Symbol* signature_symbol,
 187                                  bool is_static) {
 188   TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string));
 189   if (name == nullptr) {
 190     ResourceMark rm;
 191     log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string);
 192     vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name());
 193   }
 194   compute_offset(dest_offset, ik, name, signature_symbol, is_static);
 195 }
 196 
 197 // java_lang_String
 198 
 199 int java_lang_String::_value_offset;
 200 int java_lang_String::_hash_offset;
 201 int java_lang_String::_hashIsZero_offset;
 202 int java_lang_String::_coder_offset;
 203 int java_lang_String::_flags_offset;
 204 
 205 bool java_lang_String::_initialized;
 206 
 207 
 208 bool java_lang_String::test_and_set_flag(oop java_string, uint8_t flag_mask) {
 209   uint8_t* addr = flags_addr(java_string);
 210   uint8_t value = Atomic::load(addr);
 211   while ((value & flag_mask) == 0) {
 212     uint8_t old_value = value;
 213     value |= flag_mask;
 214     value = Atomic::cmpxchg(addr, old_value, value);
 215     if (value == old_value) return false; // Flag bit changed from 0 to 1.
 216   }
 217   return true;                  // Flag bit is already 1.
 218 }
 219 
 220 #define STRING_FIELDS_DO(macro) \
 221   macro(_value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \
 222   macro(_hash_offset,  k, "hash",                  int_signature,        false); \
 223   macro(_hashIsZero_offset, k, "hashIsZero",       bool_signature,       false); \
 224   macro(_coder_offset, k, "coder",                 byte_signature,       false);
 225 
 226 void java_lang_String::compute_offsets() {
 227   if (_initialized) {
 228     return;
 229   }
 230 
 231   InstanceKlass* k = vmClasses::String_klass();
 232   STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
 233   STRING_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
 234 
 235   _initialized = true;
 236 }
 237 
 238 #if INCLUDE_CDS
 239 void java_lang_String::serialize_offsets(SerializeClosure* f) {
 240   STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
 241   STRING_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
 242   f->do_bool(&_initialized);
 243 }
 244 #endif
 245 
 246 class CompactStringsFixup : public FieldClosure {
 247 private:
 248   bool _value;
 249 
 250 public:
 251   CompactStringsFixup(bool value) : _value(value) {}
 252 
 253   void do_field(fieldDescriptor* fd) {
 254     if (fd->name() == vmSymbols::compact_strings_name()) {
 255       oop mirror = fd->field_holder()->java_mirror();
 256       assert(fd->field_holder() == vmClasses::String_klass(), "Should be String");
 257       assert(mirror != nullptr, "String must have mirror already");
 258       mirror->bool_field_put(fd->offset(), _value);
 259     }
 260   }
 261 };
 262 
 263 void java_lang_String::set_compact_strings(bool value) {
 264   CompactStringsFixup fix(value);
 265   vmClasses::String_klass()->do_local_static_fields(&fix);
 266 }
 267 
 268 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
 269   assert(_initialized, "Must be initialized");
 270   assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
 271 
 272   // Create the String object first, so there's a chance that the String
 273   // and the char array it points to end up in the same cache line.
 274   oop obj;
 275   obj = vmClasses::String_klass()->allocate_instance(CHECK_NH);
 276 
 277   // Create the char array.  The String object must be handlized here
 278   // because GC can happen as a result of the allocation attempt.
 279   Handle h_obj(THREAD, obj);
 280   int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
 281   typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
 282 
 283   // Point the String at the char array
 284   obj = h_obj();
 285   set_value(obj, buffer);
 286   // No need to zero the offset, allocation zero'ed the entire String object
 287   set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
 288   return h_obj;
 289 }
 290 
 291 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) {
 292   bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
 293   Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
 294   typeArrayOop buffer = value(h_obj());
 295   assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
 296   if (is_latin1) {
 297     for (int index = 0; index < length; index++) {
 298       buffer->byte_at_put(index, (jbyte)unicode[index]);
 299     }
 300   } else {
 301     for (int index = 0; index < length; index++) {
 302       buffer->char_at_put(index, unicode[index]);
 303     }
 304   }
 305 
 306 #ifdef ASSERT
 307   {
 308     ResourceMark rm;
 309     size_t utf8_len = static_cast<size_t>(length);
 310     char* expected = UNICODE::as_utf8(unicode, utf8_len);
 311     char* actual = as_utf8_string(h_obj());
 312     if (strcmp(expected, actual) != 0) {
 313       fatal("Unicode conversion failure: %s --> %s", expected, actual);
 314     }
 315   }
 316 #endif
 317 
 318   return h_obj;
 319 }
 320 
 321 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) {
 322   Handle h_obj = create_from_unicode(unicode, length, CHECK_NULL);
 323   return h_obj();
 324 }
 325 
 326 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
 327   if (utf8_str == nullptr) {
 328     return Handle();
 329   }
 330   bool has_multibyte, is_latin1;
 331   int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
 332   if (!CompactStrings) {
 333     has_multibyte = true;
 334     is_latin1 = false;
 335   }
 336 
 337   Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
 338   if (length > 0) {
 339     if (!has_multibyte) {
 340       const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
 341       ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
 342     } else if (is_latin1) {
 343       UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
 344     } else {
 345       UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
 346     }
 347   }
 348 
 349 #ifdef ASSERT
 350   // This check is too strict when the input string is not a valid UTF8.
 351   // For example, it may be created with arbitrary content via jni_NewStringUTF.
 352   if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, strlen(utf8_str), /*version_leq_47*/false)) {
 353     ResourceMark rm;
 354     const char* expected = utf8_str;
 355     char* actual = as_utf8_string(h_obj());
 356     if (strcmp(expected, actual) != 0) {
 357       fatal("String conversion failure: %s --> %s", expected, actual);
 358     }
 359   }
 360 #endif
 361 
 362   return h_obj;
 363 }
 364 
 365 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
 366   Handle h_obj = create_from_str(utf8_str, CHECK_NULL);
 367   return h_obj();
 368 }
 369 
 370 Handle java_lang_String::create_from_symbol(const Symbol* symbol, TRAPS) {
 371   const char* utf8_str = (char*)symbol->bytes();
 372   int utf8_len = symbol->utf8_length();
 373 
 374   bool has_multibyte, is_latin1;
 375   int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
 376   if (!CompactStrings) {
 377     has_multibyte = true;
 378     is_latin1 = false;
 379   }
 380 
 381   Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
 382   if (length > 0) {
 383     if (!has_multibyte) {
 384       const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
 385       ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
 386     } else if (is_latin1) {
 387       UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
 388     } else {
 389       UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
 390     }
 391   }
 392 
 393 #ifdef ASSERT
 394   // This check is too strict on older classfile versions
 395   if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, utf8_len, /*version_leq_47*/false))
 396   {
 397     ResourceMark rm;
 398     const char* expected = symbol->as_utf8();
 399     char* actual = as_utf8_string(h_obj());
 400     if (strncmp(expected, actual, utf8_len) != 0) {
 401       fatal("Symbol conversion failure: %s --> %s", expected, actual);
 402     }
 403   }
 404 #endif
 405 
 406   return h_obj;
 407 }
 408 
 409 // Converts a C string to a Java String based on current encoding
 410 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
 411   assert(str != nullptr, "bad arguments");
 412 
 413   typedef jstring (JNICALL *to_java_string_fn_t)(JNIEnv*, const char *);
 414   static to_java_string_fn_t _to_java_string_fn = nullptr;
 415 
 416   if (_to_java_string_fn == nullptr) {
 417     void *lib_handle = os::native_java_library();
 418     _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "JNU_NewStringPlatform"));
 419     if (_to_java_string_fn == nullptr) {
 420       fatal("JNU_NewStringPlatform missing");
 421     }
 422   }
 423 
 424   jstring js = nullptr;
 425   {
 426     JavaThread* thread = THREAD;
 427     HandleMark hm(thread);
 428     ThreadToNativeFromVM ttn(thread);
 429     js = (_to_java_string_fn)(thread->jni_environment(), str);
 430   }
 431 
 432   Handle native_platform_string(THREAD, JNIHandles::resolve(js));
 433   JNIHandles::destroy_local(js);  // destroy local JNIHandle.
 434   return native_platform_string;
 435 }
 436 
 437 // Converts a Java String to a native C string that can be used for
 438 // native OS calls.
 439 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
 440   typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
 441   static to_platform_string_fn_t _to_platform_string_fn = nullptr;
 442 
 443   if (_to_platform_string_fn == nullptr) {
 444     void *lib_handle = os::native_java_library();
 445     _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
 446     if (_to_platform_string_fn == nullptr) {
 447       fatal("GetStringPlatformChars missing");
 448     }
 449   }
 450 
 451   char *native_platform_string;
 452   jstring js;
 453   { JavaThread* thread = THREAD;
 454     js = (jstring) JNIHandles::make_local(thread, java_string());
 455     HandleMark hm(thread);
 456     ThreadToNativeFromVM ttn(thread);
 457     JNIEnv *env = thread->jni_environment();
 458     bool is_copy;
 459     native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
 460     assert(is_copy == JNI_TRUE, "is_copy value changed");
 461   }
 462 
 463   // Uses a store barrier and therefore needs to be in vm state
 464   JNIHandles::destroy_local(js);
 465 
 466   return native_platform_string;
 467 }
 468 
 469 Handle java_lang_String::externalize_classname(Symbol* java_name, TRAPS) {
 470   ResourceMark rm(THREAD);
 471   return create_from_str(java_name->as_klass_external_name(), THREAD);
 472 }
 473 
 474 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
 475   jchar* result = as_unicode_string_or_null(java_string, length);
 476   if (result == nullptr) {
 477     THROW_MSG_NULL(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
 478   }
 479   return result;
 480 }
 481 
 482 jchar* java_lang_String::as_unicode_string_or_null(oop java_string, int& length) {
 483   typeArrayOop value  = java_lang_String::value(java_string);
 484                length = java_lang_String::length(java_string, value);
 485   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 486 
 487   jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
 488   if (result != nullptr) {
 489     if (!is_latin1) {
 490       for (int index = 0; index < length; index++) {
 491         result[index] = value->char_at(index);
 492       }
 493     } else {
 494       for (int index = 0; index < length; index++) {
 495         result[index] = ((jchar) value->byte_at(index)) & 0xff;
 496       }
 497     }
 498   }
 499   return result;
 500 }
 501 
 502 inline unsigned int java_lang_String::hash_code_impl(oop java_string, bool update) {
 503   // The hash and hashIsZero fields are subject to a benign data race,
 504   // making it crucial to ensure that any observable result of the
 505   // calculation in this method stays correct under any possible read of
 506   // these fields. Necessary restrictions to allow this to be correct
 507   // without explicit memory fences or similar concurrency primitives is
 508   // that we can ever only write to one of these two fields for a given
 509   // String instance, and that the computation is idempotent and derived
 510   // from immutable state
 511   assert(_initialized && (_hash_offset > 0) && (_hashIsZero_offset > 0), "Must be initialized");
 512   if (java_lang_String::hash_is_set(java_string)) {
 513     return java_string->int_field(_hash_offset);
 514   }
 515 
 516   typeArrayOop value = java_lang_String::value(java_string);
 517   int         length = java_lang_String::length(java_string, value);
 518   bool     is_latin1 = java_lang_String::is_latin1(java_string);
 519 
 520   unsigned int hash = 0;
 521   if (length > 0) {
 522     if (is_latin1) {
 523       hash = java_lang_String::hash_code(value->byte_at_addr(0), length);
 524     } else {
 525       hash = java_lang_String::hash_code(value->char_at_addr(0), length);
 526     }
 527   }
 528 
 529   if (update) {
 530     if (hash != 0) {
 531       java_string->int_field_put(_hash_offset, hash);
 532     } else {
 533       java_string->bool_field_put(_hashIsZero_offset, true);
 534     }
 535   }
 536   return hash;
 537 }
 538 
 539 unsigned int java_lang_String::hash_code(oop java_string) {
 540   return hash_code_impl(java_string, /*update=*/true);
 541 }
 542 
 543 unsigned int java_lang_String::hash_code_noupdate(oop java_string) {
 544   return hash_code_impl(java_string, /*update=*/false);
 545 }
 546 
 547 
 548 char* java_lang_String::as_quoted_ascii(oop java_string) {
 549   typeArrayOop value  = java_lang_String::value(java_string);
 550   int          length = java_lang_String::length(java_string, value);
 551   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 552 
 553   if (length == 0) return nullptr;
 554 
 555   char* result;
 556   size_t result_length;
 557   if (!is_latin1) {
 558     jchar* base = value->char_at_addr(0);
 559     result_length = UNICODE::quoted_ascii_length(base, length) + 1;
 560     result = NEW_RESOURCE_ARRAY(char, result_length);
 561     UNICODE::as_quoted_ascii(base, length, result, result_length);
 562   } else {
 563     jbyte* base = value->byte_at_addr(0);
 564     result_length = UNICODE::quoted_ascii_length(base, length) + 1;
 565     result = NEW_RESOURCE_ARRAY(char, result_length);
 566     UNICODE::as_quoted_ascii(base, length, result, result_length);
 567   }
 568   assert(result_length >= (size_t)length + 1, "must not be shorter");
 569   assert(result_length == strlen(result) + 1, "must match");
 570   return result;
 571 }
 572 
 573 Symbol* java_lang_String::as_symbol(oop java_string) {
 574   typeArrayOop value  = java_lang_String::value(java_string);
 575   int          length = java_lang_String::length(java_string, value);
 576   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 577   if (!is_latin1) {
 578     jchar* base = (length == 0) ? nullptr : value->char_at_addr(0);
 579     Symbol* sym = SymbolTable::new_symbol(base, length);
 580     return sym;
 581   } else {
 582     ResourceMark rm;
 583     jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
 584     size_t utf8_len = static_cast<size_t>(length);
 585     const char* base = UNICODE::as_utf8(position, utf8_len);
 586     Symbol* sym = SymbolTable::new_symbol(base, checked_cast<int>(utf8_len));
 587     return sym;
 588   }
 589 }
 590 
 591 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
 592   typeArrayOop value  = java_lang_String::value(java_string);
 593   int          length = java_lang_String::length(java_string, value);
 594   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 595   if (!is_latin1) {
 596     jchar* base = (length == 0) ? nullptr : value->char_at_addr(0);
 597     return SymbolTable::probe_unicode(base, length);
 598   } else {
 599     ResourceMark rm;
 600     jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
 601     size_t utf8_len = static_cast<size_t>(length);
 602     const char* base = UNICODE::as_utf8(position, utf8_len);
 603     return SymbolTable::probe(base, checked_cast<int>(utf8_len));
 604   }
 605 }
 606 
 607 size_t java_lang_String::utf8_length(oop java_string, typeArrayOop value) {
 608   assert(value_equals(value, java_lang_String::value(java_string)),
 609          "value must be same as java_lang_String::value(java_string)");
 610   int length = java_lang_String::length(java_string, value);
 611   if (length == 0) {
 612     return 0;
 613   }
 614   if (!java_lang_String::is_latin1(java_string)) {
 615     return UNICODE::utf8_length(value->char_at_addr(0), length);
 616   } else {
 617     return UNICODE::utf8_length(value->byte_at_addr(0), length);
 618   }
 619 }
 620 
 621 size_t java_lang_String::utf8_length(oop java_string) {
 622   typeArrayOop value = java_lang_String::value(java_string);
 623   return utf8_length(java_string, value);
 624 }
 625 
 626 int java_lang_String::utf8_length_as_int(oop java_string) {
 627   typeArrayOop value = java_lang_String::value(java_string);
 628   return utf8_length_as_int(java_string, value);
 629 }
 630 
 631 int java_lang_String::utf8_length_as_int(oop java_string, typeArrayOop value) {
 632   assert(value_equals(value, java_lang_String::value(java_string)),
 633          "value must be same as java_lang_String::value(java_string)");
 634   int length = java_lang_String::length(java_string, value);
 635   if (length == 0) {
 636     return 0;
 637   }
 638   if (!java_lang_String::is_latin1(java_string)) {
 639     return UNICODE::utf8_length_as_int(value->char_at_addr(0), length);
 640   } else {
 641     return UNICODE::utf8_length_as_int(value->byte_at_addr(0), length);
 642   }
 643 }
 644 
 645 char* java_lang_String::as_utf8_string(oop java_string) {
 646   size_t length;
 647   return as_utf8_string(java_string, length);
 648 }
 649 
 650 char* java_lang_String::as_utf8_string(oop java_string, size_t& length) {
 651   typeArrayOop value = java_lang_String::value(java_string);
 652   // `length` is used as the incoming number of characters to
 653   // convert, and then set as the number of bytes in the UTF8 sequence.
 654   length             = java_lang_String::length(java_string, value);
 655   bool     is_latin1 = java_lang_String::is_latin1(java_string);
 656   if (!is_latin1) {
 657     jchar* position = (length == 0) ? nullptr : value->char_at_addr(0);
 658     return UNICODE::as_utf8(position, length);
 659   } else {
 660     jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
 661     return UNICODE::as_utf8(position, length);
 662   }
 663 }
 664 
 665 // Uses a provided buffer if it's sufficiently large, otherwise allocates
 666 // a resource array to fit
 667 char* java_lang_String::as_utf8_string_full(oop java_string, char* buf, size_t buflen, size_t& utf8_len) {
 668   typeArrayOop value = java_lang_String::value(java_string);
 669   int            len = java_lang_String::length(java_string, value);
 670   bool     is_latin1 = java_lang_String::is_latin1(java_string);
 671   if (!is_latin1) {
 672     jchar *position = (len == 0) ? nullptr : value->char_at_addr(0);
 673     utf8_len = UNICODE::utf8_length(position, len);
 674     if (utf8_len >= buflen) {
 675       buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
 676     }
 677     return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
 678   } else {
 679     jbyte *position = (len == 0) ? nullptr : value->byte_at_addr(0);
 680     utf8_len = UNICODE::utf8_length(position, len);
 681     if (utf8_len >= buflen) {
 682       buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
 683     }
 684     return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
 685   }
 686 }
 687 
 688 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, size_t buflen) {
 689   assert(value_equals(value, java_lang_String::value(java_string)),
 690          "value must be same as java_lang_String::value(java_string)");
 691   int     length = java_lang_String::length(java_string, value);
 692   bool is_latin1 = java_lang_String::is_latin1(java_string);
 693   if (!is_latin1) {
 694     jchar* position = (length == 0) ? nullptr : value->char_at_addr(0);
 695     return UNICODE::as_utf8(position, length, buf, buflen);
 696   } else {
 697     jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
 698     return UNICODE::as_utf8(position, length, buf, buflen);
 699   }
 700 }
 701 
 702 char* java_lang_String::as_utf8_string(oop java_string, char* buf, size_t buflen) {
 703   typeArrayOop value = java_lang_String::value(java_string);
 704   return as_utf8_string(java_string, value, buf, buflen);
 705 }
 706 
 707 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
 708   // `length` is used as the incoming number of characters to
 709   // convert, and then set as the number of bytes in the UTF8 sequence.
 710   size_t  length = static_cast<size_t>(len);
 711   typeArrayOop value  = java_lang_String::value(java_string);
 712   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 713   assert(start + len <= java_lang_String::length(java_string), "just checking");
 714   if (!is_latin1) {
 715     jchar* position = value->char_at_addr(start);
 716     return UNICODE::as_utf8(position, length);
 717   } else {
 718     jbyte* position = value->byte_at_addr(start);
 719     return UNICODE::as_utf8(position, length);
 720   }
 721 }
 722 
 723 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, size_t buflen) {
 724   assert(value_equals(value, java_lang_String::value(java_string)),
 725          "value must be same as java_lang_String::value(java_string)");
 726   assert(start + len <= java_lang_String::length(java_string), "just checking");
 727   bool is_latin1 = java_lang_String::is_latin1(java_string);
 728   if (!is_latin1) {
 729     jchar* position = value->char_at_addr(start);
 730     return UNICODE::as_utf8(position, len, buf, buflen);
 731   } else {
 732     jbyte* position = value->byte_at_addr(start);
 733     return UNICODE::as_utf8(position, len, buf, buflen);
 734   }
 735 }
 736 
 737 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) {
 738   assert(java_string->klass() == vmClasses::String_klass(),
 739          "must be java_string");
 740   typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
 741   int length = java_lang_String::length(java_string, value);
 742   if (length != len) {
 743     return false;
 744   }
 745   bool is_latin1 = java_lang_String::is_latin1(java_string);
 746   if (!is_latin1) {
 747     for (int i = 0; i < len; i++) {
 748       if (value->char_at(i) != chars[i]) {
 749         return false;
 750       }
 751     }
 752   } else {
 753     for (int i = 0; i < len; i++) {
 754       if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
 755         return false;
 756       }
 757     }
 758   }
 759   return true;
 760 }
 761 
 762 bool java_lang_String::equals(oop java_string, const char* utf8_string, size_t utf8_len) {
 763   assert(java_string->klass() == vmClasses::String_klass(),
 764          "must be java_string");
 765   typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
 766   int length = java_lang_String::length(java_string, value);
 767   int unicode_length = UTF8::unicode_length(utf8_string, utf8_len);
 768   if (length != unicode_length) {
 769     return false;
 770   }
 771   bool is_latin1 = java_lang_String::is_latin1(java_string);
 772   jchar c;
 773   if (!is_latin1) {
 774     for (int i = 0; i < unicode_length; i++) {
 775       utf8_string = UTF8::next(utf8_string, &c);
 776       if (value->char_at(i) != c) {
 777         return false;
 778       }
 779     }
 780   } else {
 781     for (int i = 0; i < unicode_length; i++) {
 782       utf8_string = UTF8::next(utf8_string, &c);
 783       if ((((jchar) value->byte_at(i)) & 0xff) != c) {
 784         return false;
 785       }
 786     }
 787   }
 788   return true;
 789 }
 790 
 791 bool java_lang_String::equals(oop str1, oop str2) {
 792   assert(str1->klass() == vmClasses::String_klass(),
 793          "must be java String");
 794   assert(str2->klass() == vmClasses::String_klass(),
 795          "must be java String");
 796   typeArrayOop value1    = java_lang_String::value_no_keepalive(str1);
 797   bool         is_latin1 = java_lang_String::is_latin1(str1);
 798   typeArrayOop value2    = java_lang_String::value_no_keepalive(str2);
 799   bool         is_latin2 = java_lang_String::is_latin1(str2);
 800 
 801   if (is_latin1 != is_latin2) {
 802     // Strings with different coders are never equal.
 803     return false;
 804   }
 805   return value_equals(value1, value2);
 806 }
 807 
 808 // Print the given string to the given outputStream, limiting the output to
 809 // at most max_length of the string's characters. If the length exceeds the
 810 // limit we print an abridged version of the string with the "middle" elided
 811 // and replaced by " ... (N characters ommitted) ... ". If max_length is odd
 812 // it is treated as max_length-1.
 813 void java_lang_String::print(oop java_string, outputStream* st, int max_length) {
 814   assert(java_string->klass() == vmClasses::String_klass(), "must be java_string");
 815   // We need at least two characters to print A ... B
 816   assert(max_length > 1, "invalid max_length: %d", max_length);
 817 
 818   typeArrayOop value  = java_lang_String::value_no_keepalive(java_string);
 819 
 820   if (value == nullptr) {
 821     // This can happen if, e.g., printing a String
 822     // object before its initializer has been called
 823     st->print("nullptr");
 824     return;
 825   }
 826 
 827   int length = java_lang_String::length(java_string, value);
 828   bool is_latin1 = java_lang_String::is_latin1(java_string);
 829 
 830   bool abridge = length > max_length;
 831 
 832   st->print("\"");
 833   for (int index = 0; index < length; index++) {
 834     // If we need to abridge and we've printed half the allowed characters
 835     // then jump to the tail of the string.
 836     if (abridge && index >= max_length / 2) {
 837       st->print(" ... (%d characters ommitted) ... ", length - 2 * (max_length / 2));
 838       index = length - (max_length / 2);
 839       abridge = false; // only do this once
 840     }
 841     jchar c = (!is_latin1) ?  value->char_at(index) :
 842                              ((jchar) value->byte_at(index)) & 0xff;
 843     if (c < ' ') {
 844       st->print("\\x%02X", c); // print control characters e.g. \x0A
 845     } else {
 846       st->print("%c", c);
 847     }
 848   }
 849   st->print("\"");
 850 
 851   if (length > max_length) {
 852     st->print(" (abridged) ");
 853   }
 854 }
 855 
 856 // java_lang_Class
 857 
 858 int java_lang_Class::_klass_offset;
 859 int java_lang_Class::_array_klass_offset;
 860 int java_lang_Class::_oop_size_offset;
 861 int java_lang_Class::_static_oop_field_count_offset;
 862 int java_lang_Class::_class_loader_offset;
 863 int java_lang_Class::_module_offset;
 864 int java_lang_Class::_protection_domain_offset;
 865 int java_lang_Class::_component_mirror_offset;
 866 int java_lang_Class::_init_lock_offset;
 867 int java_lang_Class::_signers_offset;
 868 int java_lang_Class::_name_offset;
 869 int java_lang_Class::_source_file_offset;
 870 int java_lang_Class::_classData_offset;
 871 int java_lang_Class::_classRedefinedCount_offset;
 872 int java_lang_Class::_reflectionData_offset;
 873 int java_lang_Class::_modifiers_offset;
 874 int java_lang_Class::_is_primitive_offset;
 875 
 876 bool java_lang_Class::_offsets_computed = false;
 877 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = nullptr;
 878 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = nullptr;
 879 
 880 #ifdef ASSERT
 881 inline static void assert_valid_static_string_field(fieldDescriptor* fd) {
 882   assert(fd->has_initial_value(), "caller should have checked this");
 883   assert(fd->field_type() == T_OBJECT, "caller should have checked this");
 884   assert(fd->signature() == vmSymbols::string_signature(), "just checking");
 885 }
 886 #endif
 887 
 888 static void initialize_static_string_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
 889   DEBUG_ONLY(assert_valid_static_string_field(fd);)
 890   oop string = fd->string_initial_value(CHECK);
 891   mirror()->obj_field_put(fd->offset(), string);
 892 }
 893 
 894 static void initialize_static_primitive_field(fieldDescriptor* fd, Handle mirror) {
 895   assert(fd->has_initial_value(), "caller should have checked this");
 896   BasicType t = fd->field_type();
 897   switch (t) {
 898   case T_BYTE:
 899     mirror()->byte_field_put(fd->offset(), (jbyte)(fd->int_initial_value()));
 900     break;
 901   case T_BOOLEAN:
 902     mirror()->bool_field_put(fd->offset(), (jboolean)(fd->int_initial_value()));
 903     break;
 904   case T_CHAR:
 905     mirror()->char_field_put(fd->offset(), (jchar)(fd->int_initial_value()));
 906     break;
 907   case T_SHORT:
 908     mirror()->short_field_put(fd->offset(), (jshort)(fd->int_initial_value()));
 909     break;
 910   case T_INT:
 911     mirror()->int_field_put(fd->offset(), fd->int_initial_value());
 912     break;
 913   case T_FLOAT:
 914     mirror()->float_field_put(fd->offset(), fd->float_initial_value());
 915     break;
 916   case T_DOUBLE:
 917     mirror()->double_field_put(fd->offset(), fd->double_initial_value());
 918     break;
 919   case T_LONG:
 920     mirror()->long_field_put(fd->offset(), fd->long_initial_value());
 921     break;
 922   default:
 923     // Illegal ConstantValue attribute in class file should have been
 924     // caught during classfile parsing.
 925     ShouldNotReachHere();
 926   }
 927 }
 928 
 929 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
 930   assert(mirror.not_null() && fd->is_static(), "just checking");
 931   if (fd->has_initial_value()) {
 932     if (fd->field_type() != T_OBJECT) {
 933       initialize_static_primitive_field(fd, mirror);
 934     } else {
 935       initialize_static_string_field(fd, mirror, CHECK);
 936     }
 937   }
 938 }
 939 
 940 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
 941   assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
 942 
 943   // If the offset was read from the shared archive, it was fixed up already
 944   if (!k->is_shared()) {
 945     if (k->is_instance_klass()) {
 946       // During bootstrap, java.lang.Class wasn't loaded so static field
 947       // offsets were computed without the size added it.  Go back and
 948       // update all the static field offsets to included the size.
 949 
 950       // Unfortunately, the FieldInfo stream is encoded with UNSIGNED5 which doesn't allow
 951       // content updates. So the FieldInfo stream has to be decompressed into a temporary array,
 952       // static fields offsets are updated in this array before reencoding everything into
 953       // a new UNSIGNED5 stream, and substitute it to the old FieldInfo stream.
 954 
 955       int java_fields;
 956       int injected_fields;
 957       InstanceKlass* ik = InstanceKlass::cast(k);
 958       GrowableArray<FieldInfo>* fields =
 959         FieldInfoStream::create_FieldInfoArray(ik->fieldinfo_stream(),
 960                                                &java_fields, &injected_fields);
 961       for (int i = 0; i < fields->length(); i++) {
 962         FieldInfo* fi = fields->adr_at(i);
 963         if (fi->access_flags().is_static()) {
 964           fi->set_offset(fi->offset() + InstanceMirrorKlass::offset_of_static_fields());
 965         }
 966       }
 967       Array<u1>* old_stream = ik->fieldinfo_stream();
 968       assert(fields->length() == (java_fields + injected_fields), "Must be");
 969       Array<u1>* new_fis = FieldInfoStream::create_FieldInfoStream(fields, java_fields, injected_fields, k->class_loader_data(), CHECK);
 970       ik->set_fieldinfo_stream(new_fis);
 971       MetadataFactory::free_array<u1>(k->class_loader_data(), old_stream);
 972     }
 973   }
 974 
 975   if (k->is_shared() && k->has_archived_mirror_index()) {
 976     if (ArchiveHeapLoader::is_in_use()) {
 977       bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK);
 978       assert(present, "Missing archived mirror for %s", k->external_name());
 979       return;
 980     } else {
 981       k->clear_java_mirror_handle();
 982       k->clear_archived_mirror_index();
 983     }
 984   }
 985   create_mirror(k, Handle(), Handle(), Handle(), Handle(), CHECK);
 986 }
 987 
 988 void java_lang_Class::initialize_mirror_fields(Klass* k,
 989                                                Handle mirror,
 990                                                Handle protection_domain,
 991                                                Handle classData,
 992                                                TRAPS) {
 993   // Allocate a simple java object for a lock.
 994   // This needs to be a java object because during class initialization
 995   // it can be held across a java call.
 996   typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
 997   set_init_lock(mirror(), r);
 998 
 999   // Set protection domain also
1000   set_protection_domain(mirror(), protection_domain());
1001 
1002   // Initialize static fields
1003   InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK);
1004 
1005  // Set classData
1006   set_class_data(mirror(), classData());
1007 }
1008 
1009 // Set the java.lang.Module module field in the java_lang_Class mirror
1010 void java_lang_Class::set_mirror_module_field(JavaThread* current, Klass* k, Handle mirror, Handle module) {
1011   if (module.is_null()) {
1012     // During startup, the module may be null only if java.base has not been defined yet.
1013     // Put the class on the fixup_module_list to patch later when the java.lang.Module
1014     // for java.base is known. But note that since we captured the null module another
1015     // thread may have completed that initialization.
1016 
1017     bool javabase_was_defined = false;
1018     {
1019       MutexLocker m1(current, Module_lock);
1020       // Keep list of classes needing java.base module fixup
1021       if (!ModuleEntryTable::javabase_defined()) {
1022         assert(k->java_mirror() != nullptr, "Class's mirror is null");
1023         k->class_loader_data()->inc_keep_alive_ref_count();
1024         assert(fixup_module_field_list() != nullptr, "fixup_module_field_list not initialized");
1025         fixup_module_field_list()->push(k);
1026       } else {
1027         javabase_was_defined = true;
1028       }
1029     }
1030 
1031     // If java.base was already defined then patch this particular class with java.base.
1032     if (javabase_was_defined) {
1033       ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
1034       assert(javabase_entry != nullptr && javabase_entry->module() != nullptr,
1035              "Setting class module field, " JAVA_BASE_NAME " should be defined");
1036       Handle javabase_handle(current, javabase_entry->module());
1037       set_module(mirror(), javabase_handle());
1038     }
1039   } else {
1040     assert(Universe::is_module_initialized() ||
1041            (ModuleEntryTable::javabase_defined() &&
1042             (module() == ModuleEntryTable::javabase_moduleEntry()->module())),
1043            "Incorrect java.lang.Module specification while creating mirror");
1044     set_module(mirror(), module());
1045   }
1046 }
1047 
1048 // Statically allocate fixup lists because they always get created.
1049 void java_lang_Class::allocate_fixup_lists() {
1050   GrowableArray<Klass*>* mirror_list =
1051     new (mtClass) GrowableArray<Klass*>(40, mtClass);
1052   set_fixup_mirror_list(mirror_list);
1053 
1054   GrowableArray<Klass*>* module_list =
1055     new (mtModule) GrowableArray<Klass*>(500, mtModule);
1056   set_fixup_module_field_list(module_list);
1057 }
1058 
1059 void java_lang_Class::allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData,
1060                                       Handle& mirror, Handle& comp_mirror, TRAPS) {
1061   // Allocate mirror (java.lang.Class instance)
1062   oop mirror_oop = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(k, CHECK);
1063   mirror = Handle(THREAD, mirror_oop);
1064 
1065   // Setup indirection from mirror->klass
1066   set_klass(mirror(), k);
1067 
1068   // Set the modifiers flag.
1069   u2 computed_modifiers = k->compute_modifier_flags();
1070   set_modifiers(mirror(), computed_modifiers);
1071 
1072   InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
1073   assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
1074 
1075   set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
1076 
1077   // It might also have a component mirror.  This mirror must already exist.
1078   if (k->is_array_klass()) {
1079     if (k->is_typeArray_klass()) {
1080       BasicType type = TypeArrayKlass::cast(k)->element_type();
1081       if (is_scratch) {
1082         comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(type));
1083       } else {
1084         comp_mirror = Handle(THREAD, Universe::java_mirror(type));
1085       }
1086     } else {
1087       assert(k->is_objArray_klass(), "Must be");
1088       Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1089       assert(element_klass != nullptr, "Must have an element klass");
1090       if (is_scratch) {
1091         comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass));
1092       } else {
1093         comp_mirror = Handle(THREAD, element_klass->java_mirror());
1094       }
1095     }
1096     assert(comp_mirror() != nullptr, "must have a mirror");
1097 
1098     // Two-way link between the array klass and its component mirror:
1099     // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
1100     set_component_mirror(mirror(), comp_mirror());
1101     // See below for ordering dependencies between field array_klass in component mirror
1102     // and java_mirror in this klass.
1103   } else {
1104     assert(k->is_instance_klass(), "Must be");
1105 
1106     initialize_mirror_fields(k, mirror, protection_domain, classData, THREAD);
1107     if (HAS_PENDING_EXCEPTION) {
1108       // If any of the fields throws an exception like OOM remove the klass field
1109       // from the mirror so GC doesn't follow it after the klass has been deallocated.
1110       // This mirror looks like a primitive type, which logically it is because it
1111       // it represents no class.
1112       set_klass(mirror(), nullptr);
1113       return;
1114     }
1115   }
1116 }
1117 
1118 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
1119                                     Handle module, Handle protection_domain,
1120                                     Handle classData, TRAPS) {
1121   assert(k != nullptr, "Use create_basic_type_mirror for primitive types");
1122   assert(k->java_mirror() == nullptr, "should only assign mirror once");
1123 
1124   // Class_klass has to be loaded because it is used to allocate
1125   // the mirror.
1126   if (vmClasses::Class_klass_loaded()) {
1127     Handle mirror;
1128     Handle comp_mirror;
1129 
1130     allocate_mirror(k, /*is_scratch=*/false, protection_domain, classData, mirror, comp_mirror, CHECK);
1131 
1132     // set the classLoader field in the java_lang_Class instance
1133     assert(class_loader() == k->class_loader(), "should be same");
1134     set_class_loader(mirror(), class_loader());
1135 
1136     // Setup indirection from klass->mirror
1137     // after any exceptions can happen during allocations.
1138     k->set_java_mirror(mirror);
1139 
1140     // Set the module field in the java_lang_Class instance.  This must be done
1141     // after the mirror is set.
1142     set_mirror_module_field(THREAD, k, mirror, module);
1143 
1144     if (comp_mirror() != nullptr) {
1145       // Set after k->java_mirror() is published, because compiled code running
1146       // concurrently doesn't expect a k to have a null java_mirror.
1147       release_set_array_klass(comp_mirror(), k);
1148     }
1149     if (CDSConfig::is_dumping_heap()) {
1150       create_scratch_mirror(k, CHECK);
1151     }
1152   } else {
1153     assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1154     fixup_mirror_list()->push(k);
1155   }
1156 }
1157 
1158 #if INCLUDE_CDS_JAVA_HEAP
1159 // The "scratch mirror" stores the states of the mirror object that can be
1160 // decided at dump time (such as the initial values of the static fields, the
1161 // component mirror, etc). At runtime, more information is added to it by
1162 // java_lang_Class::restore_archived_mirror().
1163 //
1164 // Essentially, /*dumptime*/create_scratch_mirror() + /*runtime*/restore_archived_mirror()
1165 // produces the same result as /*runtime*/create_mirror().
1166 //
1167 // Note: we archive the "scratch mirror" instead of k->java_mirror(), because the
1168 // latter may contain dumptime-specific information that cannot be archived
1169 // (e.g., ClassLoaderData*, or static fields that are modified by Java code execution).
1170 void java_lang_Class::create_scratch_mirror(Klass* k, TRAPS) {
1171   if (k->class_loader() != nullptr &&
1172       k->class_loader() != SystemDictionary::java_platform_loader() &&
1173       k->class_loader() != SystemDictionary::java_system_loader()) {
1174     // We only archive the mirrors of classes loaded by the built-in loaders
1175     return;
1176   }
1177 
1178   Handle protection_domain, classData; // set to null. Will be reinitialized at runtime
1179   Handle mirror;
1180   Handle comp_mirror;
1181   allocate_mirror(k, /*is_scratch=*/true, protection_domain, classData, mirror, comp_mirror, CHECK);
1182 
1183   if (comp_mirror() != nullptr) {
1184     release_set_array_klass(comp_mirror(), k);
1185   }
1186 
1187   HeapShared::set_scratch_java_mirror(k, mirror());
1188 }
1189 
1190 // Returns true if the mirror is updated, false if no archived mirror
1191 // data is present. After the archived mirror object is restored, the
1192 // shared klass' _has_raw_archived_mirror flag is cleared.
1193 bool java_lang_Class::restore_archived_mirror(Klass *k,
1194                                               Handle class_loader, Handle module,
1195                                               Handle protection_domain, TRAPS) {
1196   // Postpone restoring archived mirror until java.lang.Class is loaded. Please
1197   // see more details in vmClasses::resolve_all().
1198   if (!vmClasses::Class_klass_loaded()) {
1199     assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1200     fixup_mirror_list()->push(k);
1201     return true;
1202   }
1203 
1204   oop m = k->archived_java_mirror();
1205   assert(m != nullptr, "must have stored non-null archived mirror");
1206 
1207   // Sanity: clear it now to prevent re-initialization if any of the following fails
1208   k->clear_archived_mirror_index();
1209 
1210   // mirror is archived, restore
1211   log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1212   assert(as_Klass(m) == k, "must be");
1213   Handle mirror(THREAD, m);
1214 
1215   if (!k->is_array_klass()) {
1216     // - local static final fields with initial values were initialized at dump time
1217 
1218     // create the init_lock
1219     typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false));
1220     set_init_lock(mirror(), r);
1221 
1222     if (protection_domain.not_null()) {
1223       set_protection_domain(mirror(), protection_domain());
1224     }
1225   }
1226 
1227   assert(class_loader() == k->class_loader(), "should be same");
1228   if (class_loader.not_null()) {
1229     set_class_loader(mirror(), class_loader());
1230   }
1231 
1232   k->set_java_mirror(mirror);
1233 
1234   set_mirror_module_field(THREAD, k, mirror, module);
1235 
1236   if (log_is_enabled(Trace, cds, heap, mirror)) {
1237     ResourceMark rm(THREAD);
1238     log_trace(cds, heap, mirror)(
1239         "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1240   }
1241 
1242   return true;
1243 }
1244 #endif // INCLUDE_CDS_JAVA_HEAP
1245 
1246 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1247   assert(_module_offset != 0, "must have been computed already");
1248   set_module(k->java_mirror(), module());
1249 }
1250 
1251 void java_lang_Class::set_oop_size(HeapWord* java_class, size_t size) {
1252   assert(_oop_size_offset != 0, "must be set");
1253   assert(size > 0, "Oop size must be greater than zero, not %zu", size);
1254   assert(size <= INT_MAX, "Lossy conversion: %zu", size);
1255   *(int*)(((char*)java_class) + _oop_size_offset) = (int)size;
1256 }
1257 
1258 int  java_lang_Class::static_oop_field_count(oop java_class) {
1259   assert(_static_oop_field_count_offset != 0, "must be set");
1260   return java_class->int_field(_static_oop_field_count_offset);
1261 }
1262 
1263 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1264   assert(_static_oop_field_count_offset != 0, "must be set");
1265   java_class->int_field_put(_static_oop_field_count_offset, size);
1266 }
1267 
1268 oop java_lang_Class::protection_domain(oop java_class) {
1269   assert(_protection_domain_offset != 0, "must be set");
1270   return java_class->obj_field(_protection_domain_offset);
1271 }
1272 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1273   assert(_protection_domain_offset != 0, "must be set");
1274   java_class->obj_field_put(_protection_domain_offset, pd);
1275 }
1276 
1277 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1278   assert(_component_mirror_offset != 0, "must be set");
1279   assert(java_lang_Class::as_Klass(java_class) != nullptr &&
1280          java_lang_Class::as_Klass(java_class)->is_array_klass(), "must be");
1281   java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1282 }
1283 
1284 oop java_lang_Class::component_mirror(oop java_class) {
1285   assert(_component_mirror_offset != 0, "must be set");
1286   return java_class->obj_field(_component_mirror_offset);
1287 }
1288 
1289 oop java_lang_Class::init_lock(oop java_class) {
1290   assert(_init_lock_offset != 0, "must be set");
1291   return java_class->obj_field(_init_lock_offset);
1292 }
1293 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
1294   assert(_init_lock_offset != 0, "must be set");
1295   java_class->obj_field_put(_init_lock_offset, init_lock);
1296 }
1297 
1298 objArrayOop java_lang_Class::signers(oop java_class) {
1299   assert(_signers_offset != 0, "must be set");
1300   return (objArrayOop)java_class->obj_field(_signers_offset);
1301 }
1302 
1303 oop java_lang_Class::class_data(oop java_class) {
1304   assert(_classData_offset != 0, "must be set");
1305   return java_class->obj_field(_classData_offset);
1306 }
1307 void java_lang_Class::set_class_data(oop java_class, oop class_data) {
1308   assert(_classData_offset != 0, "must be set");
1309   java_class->obj_field_put(_classData_offset, class_data);
1310 }
1311 
1312 void java_lang_Class::set_reflection_data(oop java_class, oop reflection_data) {
1313   assert(_reflectionData_offset != 0, "must be set");
1314   java_class->obj_field_put(_reflectionData_offset, reflection_data);
1315 }
1316 
1317 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1318   assert(_class_loader_offset != 0, "offsets should have been initialized");
1319   java_class->obj_field_put(_class_loader_offset, loader);
1320 }
1321 
1322 oop java_lang_Class::class_loader(oop java_class) {
1323   assert(_class_loader_offset != 0, "must be set");
1324   return java_class->obj_field(_class_loader_offset);
1325 }
1326 
1327 oop java_lang_Class::module(oop java_class) {
1328   assert(_module_offset != 0, "must be set");
1329   return java_class->obj_field(_module_offset);
1330 }
1331 
1332 void java_lang_Class::set_module(oop java_class, oop module) {
1333   assert(_module_offset != 0, "must be set");
1334   java_class->obj_field_put(_module_offset, module);
1335 }
1336 
1337 oop java_lang_Class::name(Handle java_class, TRAPS) {
1338   assert(_name_offset != 0, "must be set");
1339   oop o = java_class->obj_field(_name_offset);
1340   if (o == nullptr) {
1341     o = StringTable::intern(as_external_name(java_class()), THREAD);
1342     java_class->obj_field_put(_name_offset, o);
1343   }
1344   return o;
1345 }
1346 
1347 oop java_lang_Class::source_file(oop java_class) {
1348   assert(_source_file_offset != 0, "must be set");
1349   return java_class->obj_field(_source_file_offset);
1350 }
1351 
1352 void java_lang_Class::set_source_file(oop java_class, oop source_file) {
1353   assert(_source_file_offset != 0, "must be set");
1354   java_class->obj_field_put(_source_file_offset, source_file);
1355 }
1356 
1357 void java_lang_Class::set_is_primitive(oop java_class) {
1358   assert(_is_primitive_offset != 0, "must be set");
1359   java_class->bool_field_put(_is_primitive_offset, true);
1360 }
1361 
1362 
1363 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1364   // Mirrors for basic types have a null klass field, which makes them special.
1365   oop java_class = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(nullptr, CHECK_NULL);
1366   if (type != T_VOID) {
1367     Klass* aklass = Universe::typeArrayKlass(type);
1368     assert(aklass != nullptr, "correct bootstrap");
1369     release_set_array_klass(java_class, aklass);
1370   }
1371 #ifdef ASSERT
1372   InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(vmClasses::Class_klass());
1373   assert(static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1374 #endif
1375   set_modifiers(java_class, JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC);
1376   set_is_primitive(java_class);
1377   return java_class;
1378 }
1379 
1380 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1381   assert(is_instance(java_class), "must be a Class object");
1382   java_class->metadata_field_put(_klass_offset, klass);
1383 }
1384 
1385 
1386 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1387   assert(is_instance(java_class), "must be a Class object");
1388   Symbol* name = nullptr;
1389   bool is_instance = false;
1390   if (is_primitive(java_class)) {
1391     name = vmSymbols::type_signature(primitive_type(java_class));
1392   } else {
1393     Klass* k = as_Klass(java_class);
1394     is_instance = k->is_instance_klass();
1395     name = k->name();
1396   }
1397   if (name == nullptr) {
1398     st->print("<null>");
1399     return;
1400   }
1401   if (is_instance)  st->print("L");
1402   st->write((char*) name->base(), (int) name->utf8_length());
1403   if (is_instance)  st->print(";");
1404 }
1405 
1406 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) {
1407   assert(is_instance(java_class), "must be a Class object");
1408   Symbol* name;
1409   if (is_primitive(java_class)) {
1410     name = vmSymbols::type_signature(primitive_type(java_class));
1411     // Because this can create a new symbol, the caller has to decrement
1412     // the refcount, so make adjustment here and below for symbols returned
1413     // that are not created or incremented due to a successful lookup.
1414     name->increment_refcount();
1415   } else {
1416     Klass* k = as_Klass(java_class);
1417     if (!k->is_instance_klass()) {
1418       name = k->name();
1419       name->increment_refcount();
1420     } else {
1421       ResourceMark rm;
1422       const char* sigstr = k->signature_name();
1423       int         siglen = (int) strlen(sigstr);
1424       if (!intern_if_not_found) {
1425         name = SymbolTable::probe(sigstr, siglen);
1426       } else {
1427         name = SymbolTable::new_symbol(sigstr, siglen);
1428       }
1429     }
1430   }
1431   return name;
1432 }
1433 
1434 // Returns the Java name for this Java mirror (Resource allocated)
1435 // See Klass::external_name().
1436 // For primitive type Java mirrors, its type name is returned.
1437 const char* java_lang_Class::as_external_name(oop java_class) {
1438   assert(is_instance(java_class), "must be a Class object");
1439   const char* name = nullptr;
1440   if (is_primitive(java_class)) {
1441     name = type2name(primitive_type(java_class));
1442   } else {
1443     name = as_Klass(java_class)->external_name();
1444   }
1445   if (name == nullptr) {
1446     name = "<null>";
1447   }
1448   return name;
1449 }
1450 
1451 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1452   Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1453   assert(k == nullptr || (k->is_klass() && k->is_array_klass()), "should be array klass");
1454   return k;
1455 }
1456 
1457 
1458 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1459   assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1460   java_class->release_metadata_field_put(_array_klass_offset, klass);
1461 }
1462 
1463 
1464 BasicType java_lang_Class::primitive_type(oop java_class) {
1465   assert(is_primitive(java_class), "just checking");
1466   Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1467   BasicType type = T_VOID;
1468   if (ak != nullptr) {
1469     // Note: create_basic_type_mirror above initializes ak to a non-null value.
1470     type = ArrayKlass::cast(ak)->element_type();
1471   } else {
1472     assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
1473   }
1474 #ifdef ASSERT
1475   if (CDSConfig::is_dumping_heap()) {
1476     oop mirror = Universe::java_mirror(type);
1477     oop scratch_mirror = HeapShared::scratch_java_mirror(type);
1478     assert(java_class == mirror || java_class == scratch_mirror, "must be consistent");
1479   } else {
1480     assert(Universe::java_mirror(type) == java_class, "must be consistent");
1481   }
1482 #endif
1483   return type;
1484 }
1485 
1486 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1487   assert(is_instance(java_class), "must be a Class object");
1488   if (is_primitive(java_class)) {
1489     if (reference_klass != nullptr)
1490       (*reference_klass) = nullptr;
1491     return primitive_type(java_class);
1492   } else {
1493     if (reference_klass != nullptr)
1494       (*reference_klass) = as_Klass(java_class);
1495     return T_OBJECT;
1496   }
1497 }
1498 
1499 
1500 oop java_lang_Class::primitive_mirror(BasicType t) {
1501   oop mirror = Universe::java_mirror(t);
1502   assert(mirror != nullptr && mirror->is_a(vmClasses::Class_klass()), "must be a Class");
1503   assert(is_primitive(mirror), "must be primitive");
1504   return mirror;
1505 }
1506 
1507 #define CLASS_FIELDS_DO(macro) \
1508   macro(_classRedefinedCount_offset, k, "classRedefinedCount", int_signature,          false); \
1509   macro(_class_loader_offset,        k, "classLoader",         classloader_signature,  false); \
1510   macro(_component_mirror_offset,    k, "componentType",       class_signature,        false); \
1511   macro(_module_offset,              k, "module",              module_signature,       false); \
1512   macro(_name_offset,                k, "name",                string_signature,       false); \
1513   macro(_classData_offset,           k, "classData",           object_signature,       false); \
1514   macro(_reflectionData_offset,      k, "reflectionData",      java_lang_ref_SoftReference_signature, false); \
1515   macro(_signers_offset,             k, "signers",             object_array_signature, false); \
1516   macro(_modifiers_offset,           k, vmSymbols::modifiers_name(), char_signature,    false); \
1517   macro(_protection_domain_offset,   k, "protectionDomain",    java_security_ProtectionDomain_signature,  false); \
1518   macro(_is_primitive_offset,        k, "primitive",           bool_signature,         false);
1519 
1520 void java_lang_Class::compute_offsets() {
1521   if (_offsets_computed) {
1522     return;
1523   }
1524 
1525   _offsets_computed = true;
1526 
1527   InstanceKlass* k = vmClasses::Class_klass();
1528   CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1529   CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1530 }
1531 
1532 #if INCLUDE_CDS
1533 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1534   f->do_bool(&_offsets_computed);
1535 
1536   CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1537 
1538   CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1539 }
1540 #endif
1541 
1542 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1543   assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1544   return the_class_mirror->int_field(_classRedefinedCount_offset);
1545 }
1546 
1547 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1548   assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1549   the_class_mirror->int_field_put(_classRedefinedCount_offset, value);
1550 }
1551 
1552 int java_lang_Class::modifiers(oop the_class_mirror) {
1553   assert(_modifiers_offset != 0, "offsets should have been initialized");
1554   return the_class_mirror->char_field(_modifiers_offset);
1555 }
1556 
1557 void java_lang_Class::set_modifiers(oop the_class_mirror, u2 value) {
1558   assert(_modifiers_offset != 0, "offsets should have been initialized");
1559   the_class_mirror->char_field_put(_modifiers_offset, value);
1560 }
1561 
1562 
1563 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1564 //       platform thread structure, and a eetop offset which was used for thread
1565 //       local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1566 //       merged, so in the HotSpot VM we just use the eetop field for the thread
1567 //       instead of the privateInfo_offset.
1568 //
1569 // Note: The stackSize field is only present starting in 1.4.
1570 
1571 int java_lang_Thread_FieldHolder::_group_offset;
1572 int java_lang_Thread_FieldHolder::_priority_offset;
1573 int java_lang_Thread_FieldHolder::_stackSize_offset;
1574 int java_lang_Thread_FieldHolder::_daemon_offset;
1575 int java_lang_Thread_FieldHolder::_thread_status_offset;
1576 
1577 #define THREAD_FIELD_HOLDER_FIELDS_DO(macro) \
1578   macro(_group_offset,         k, vmSymbols::group_name(),    threadgroup_signature, false); \
1579   macro(_priority_offset,      k, vmSymbols::priority_name(), int_signature,         false); \
1580   macro(_stackSize_offset,     k, "stackSize",                long_signature,        false); \
1581   macro(_daemon_offset,        k, vmSymbols::daemon_name(),   bool_signature,        false); \
1582   macro(_thread_status_offset, k, "threadStatus",             int_signature,         false)
1583 
1584 void java_lang_Thread_FieldHolder::compute_offsets() {
1585   assert(_group_offset == 0, "offsets should be initialized only once");
1586 
1587   InstanceKlass* k = vmClasses::Thread_FieldHolder_klass();
1588   THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1589 }
1590 
1591 #if INCLUDE_CDS
1592 void java_lang_Thread_FieldHolder::serialize_offsets(SerializeClosure* f) {
1593   THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1594 }
1595 #endif
1596 
1597 oop java_lang_Thread_FieldHolder::threadGroup(oop holder) {
1598   return holder->obj_field(_group_offset);
1599 }
1600 
1601 ThreadPriority java_lang_Thread_FieldHolder::priority(oop holder) {
1602   return (ThreadPriority)holder->int_field(_priority_offset);
1603 }
1604 
1605 void java_lang_Thread_FieldHolder::set_priority(oop holder, ThreadPriority priority) {
1606   holder->int_field_put(_priority_offset, priority);
1607 }
1608 
1609 jlong java_lang_Thread_FieldHolder::stackSize(oop holder) {
1610   return holder->long_field(_stackSize_offset);
1611 }
1612 
1613 bool java_lang_Thread_FieldHolder::is_daemon(oop holder) {
1614   return holder->bool_field(_daemon_offset) != 0;
1615 }
1616 
1617 void java_lang_Thread_FieldHolder::set_daemon(oop holder, bool val) {
1618   assert(val, "daemon status is never turned off");
1619   holder->bool_field_put(_daemon_offset, val);
1620 }
1621 
1622 void java_lang_Thread_FieldHolder::set_thread_status(oop holder, JavaThreadStatus status) {
1623   holder->int_field_put(_thread_status_offset, static_cast<int>(status));
1624 }
1625 
1626 JavaThreadStatus java_lang_Thread_FieldHolder::get_thread_status(oop holder) {
1627   return static_cast<JavaThreadStatus>(holder->int_field(_thread_status_offset));
1628 }
1629 
1630 
1631 int java_lang_Thread_Constants::_static_VTHREAD_GROUP_offset = 0;
1632 
1633 #define THREAD_CONSTANTS_STATIC_FIELDS_DO(macro) \
1634   macro(_static_VTHREAD_GROUP_offset,             k, "VTHREAD_GROUP",             threadgroup_signature, true);
1635 
1636 void java_lang_Thread_Constants::compute_offsets() {
1637   assert(_static_VTHREAD_GROUP_offset == 0, "offsets should be initialized only once");
1638 
1639   InstanceKlass* k = vmClasses::Thread_Constants_klass();
1640   THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1641 }
1642 
1643 #if INCLUDE_CDS
1644 void java_lang_Thread_Constants::serialize_offsets(SerializeClosure* f) {
1645   THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1646 }
1647 #endif
1648 
1649 oop java_lang_Thread_Constants::get_VTHREAD_GROUP() {
1650   InstanceKlass* k = vmClasses::Thread_Constants_klass();
1651   oop base = k->static_field_base_raw();
1652   return base->obj_field(_static_VTHREAD_GROUP_offset);
1653 }
1654 
1655 
1656 int java_lang_Thread::_holder_offset;
1657 int java_lang_Thread::_name_offset;
1658 int java_lang_Thread::_contextClassLoader_offset;
1659 int java_lang_Thread::_eetop_offset;
1660 int java_lang_Thread::_jvmti_thread_state_offset;
1661 int java_lang_Thread::_jvmti_VTMS_transition_disable_count_offset;
1662 int java_lang_Thread::_jvmti_is_in_VTMS_transition_offset;
1663 int java_lang_Thread::_interrupted_offset;
1664 int java_lang_Thread::_interruptLock_offset;
1665 int java_lang_Thread::_tid_offset;
1666 int java_lang_Thread::_continuation_offset;
1667 int java_lang_Thread::_park_blocker_offset;
1668 int java_lang_Thread::_scopedValueBindings_offset;
1669 JFR_ONLY(int java_lang_Thread::_jfr_epoch_offset;)
1670 
1671 #define THREAD_FIELDS_DO(macro) \
1672   macro(_holder_offset,        k, "holder", thread_fieldholder_signature, false); \
1673   macro(_name_offset,          k, vmSymbols::name_name(), string_signature, false); \
1674   macro(_contextClassLoader_offset, k, "contextClassLoader", classloader_signature, false); \
1675   macro(_eetop_offset,         k, "eetop", long_signature, false); \
1676   macro(_interrupted_offset,   k, "interrupted", bool_signature, false); \
1677   macro(_interruptLock_offset, k, "interruptLock", object_signature, false); \
1678   macro(_tid_offset,           k, "tid", long_signature, false); \
1679   macro(_park_blocker_offset,  k, "parkBlocker", object_signature, false); \
1680   macro(_continuation_offset,  k, "cont", continuation_signature, false); \
1681   macro(_scopedValueBindings_offset, k, "scopedValueBindings", object_signature, false);
1682 
1683 void java_lang_Thread::compute_offsets() {
1684   assert(_holder_offset == 0, "offsets should be initialized only once");
1685 
1686   InstanceKlass* k = vmClasses::Thread_klass();
1687   THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1688   THREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1689 }
1690 
1691 #if INCLUDE_CDS
1692 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1693   THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1694   THREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1695 }
1696 #endif
1697 
1698 JavaThread* java_lang_Thread::thread(oop java_thread) {
1699   return reinterpret_cast<JavaThread*>(java_thread->address_field(_eetop_offset));
1700 }
1701 
1702 JavaThread* java_lang_Thread::thread_acquire(oop java_thread) {
1703   return reinterpret_cast<JavaThread*>(java_thread->address_field_acquire(_eetop_offset));
1704 }
1705 
1706 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1707   java_thread->address_field_put(_eetop_offset, (address)thread);
1708 }
1709 
1710 void java_lang_Thread::release_set_thread(oop java_thread, JavaThread* thread) {
1711   java_thread->release_address_field_put(_eetop_offset, (address)thread);
1712 }
1713 
1714 JvmtiThreadState* java_lang_Thread::jvmti_thread_state(oop java_thread) {
1715   return (JvmtiThreadState*)java_thread->address_field(_jvmti_thread_state_offset);
1716 }
1717 
1718 void java_lang_Thread::set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state) {
1719   java_thread->address_field_put(_jvmti_thread_state_offset, (address)state);
1720 }
1721 
1722 int java_lang_Thread::VTMS_transition_disable_count(oop java_thread) {
1723   return java_thread->int_field(_jvmti_VTMS_transition_disable_count_offset);
1724 }
1725 
1726 void java_lang_Thread::inc_VTMS_transition_disable_count(oop java_thread) {
1727   assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1728   int val = VTMS_transition_disable_count(java_thread);
1729   java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val + 1);
1730 }
1731 
1732 void java_lang_Thread::dec_VTMS_transition_disable_count(oop java_thread) {
1733   assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1734   int val = VTMS_transition_disable_count(java_thread);
1735   assert(val > 0, "VTMS_transition_disable_count should never be negative");
1736   java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val - 1);
1737 }
1738 
1739 bool java_lang_Thread::is_in_VTMS_transition(oop java_thread) {
1740   return java_thread->bool_field_volatile(_jvmti_is_in_VTMS_transition_offset);
1741 }
1742 
1743 void java_lang_Thread::set_is_in_VTMS_transition(oop java_thread, bool val) {
1744   assert(is_in_VTMS_transition(java_thread) != val, "already %s transition", val ? "inside" : "outside");
1745   java_thread->bool_field_put_volatile(_jvmti_is_in_VTMS_transition_offset, val);
1746 }
1747 
1748 int java_lang_Thread::is_in_VTMS_transition_offset() {
1749   return _jvmti_is_in_VTMS_transition_offset;
1750 }
1751 
1752 void java_lang_Thread::clear_scopedValueBindings(oop java_thread) {
1753   assert(java_thread != nullptr, "need a java_lang_Thread pointer here");
1754   java_thread->obj_field_put(_scopedValueBindings_offset, nullptr);
1755 }
1756 
1757 oop java_lang_Thread::holder(oop java_thread) {
1758   // Note: may return null if the thread is still attaching
1759   return java_thread->obj_field(_holder_offset);
1760 }
1761 oop java_lang_Thread::interrupt_lock(oop java_thread) {
1762   return java_thread->obj_field(_interruptLock_offset);
1763 }
1764 
1765 bool java_lang_Thread::interrupted(oop java_thread) {
1766   // Make sure the caller can safely access oops.
1767   assert(Thread::current()->is_VM_thread() ||
1768          (JavaThread::current()->thread_state() != _thread_blocked &&
1769           JavaThread::current()->thread_state() != _thread_in_native),
1770          "Unsafe access to oop");
1771   return java_thread->bool_field_volatile(_interrupted_offset);
1772 }
1773 
1774 void java_lang_Thread::set_interrupted(oop java_thread, bool val) {
1775   // Make sure the caller can safely access oops.
1776   assert(Thread::current()->is_VM_thread() ||
1777          (JavaThread::current()->thread_state() != _thread_blocked &&
1778           JavaThread::current()->thread_state() != _thread_in_native),
1779          "Unsafe access to oop");
1780   java_thread->bool_field_put_volatile(_interrupted_offset, val);
1781 }
1782 
1783 
1784 oop java_lang_Thread::name(oop java_thread) {
1785   return java_thread->obj_field(_name_offset);
1786 }
1787 
1788 
1789 void java_lang_Thread::set_name(oop java_thread, oop name) {
1790   java_thread->obj_field_put(_name_offset, name);
1791 }
1792 
1793 // Convenience macros for setting and getting Thread fields that
1794 // are actually stored in the FieldHolder object of the thread.
1795 // The FieldHolder can be null whilst a thread is attaching via
1796 // JNI, and when the main thread is attaching.
1797 
1798 // The default value should be the default/zero initialized value
1799 // of the field as it would be in java.lang.Thread.FieldHolder.
1800 #define GET_FIELDHOLDER_FIELD(java_thread, field, default_val)  \
1801   {                                                             \
1802     oop holder = java_lang_Thread::holder(java_thread);         \
1803     if (holder != nullptr)                                      \
1804       return java_lang_Thread_FieldHolder::field(holder);       \
1805     else                                                        \
1806       return default_val;                                       \
1807   }
1808 
1809 // We should never be trying to set a field of an attaching thread.
1810 #define SET_FIELDHOLDER_FIELD(java_thread, field, value)        \
1811   {                                                             \
1812     oop holder = java_lang_Thread::holder(java_thread);         \
1813     assert(holder != nullptr, "Thread not fully initialized");  \
1814     java_lang_Thread_FieldHolder::set_##field(holder, value);   \
1815   }
1816 
1817 
1818 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1819   GET_FIELDHOLDER_FIELD(java_thread, priority, (ThreadPriority)0);
1820 }
1821 
1822 
1823 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1824   SET_FIELDHOLDER_FIELD(java_thread, priority, priority)
1825 }
1826 
1827 
1828 oop java_lang_Thread::threadGroup(oop java_thread) {
1829   GET_FIELDHOLDER_FIELD(java_thread, threadGroup, nullptr);
1830 }
1831 
1832 
1833 bool java_lang_Thread::is_alive(oop java_thread) {
1834   JavaThread* thr = java_lang_Thread::thread(java_thread);
1835   return (thr != nullptr);
1836 }
1837 
1838 
1839 bool java_lang_Thread::is_daemon(oop java_thread) {
1840   GET_FIELDHOLDER_FIELD(java_thread, is_daemon, false);
1841 }
1842 
1843 
1844 void java_lang_Thread::set_daemon(oop java_thread) {
1845   SET_FIELDHOLDER_FIELD(java_thread, daemon, true);
1846 }
1847 
1848 oop java_lang_Thread::context_class_loader(oop java_thread) {
1849   return java_thread->obj_field(_contextClassLoader_offset);
1850 }
1851 
1852 
1853 jlong java_lang_Thread::stackSize(oop java_thread) {
1854   GET_FIELDHOLDER_FIELD(java_thread, stackSize, 0);
1855 }
1856 
1857 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1858 void java_lang_Thread::set_thread_status(oop java_thread, JavaThreadStatus status) {
1859   SET_FIELDHOLDER_FIELD(java_thread, thread_status, status);
1860 }
1861 
1862 // Read thread status value from threadStatus field in java.lang.Thread java class.
1863 JavaThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1864   // Make sure the caller is operating on behalf of the VM or is
1865   // running VM code (state == _thread_in_vm).
1866   assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1867          JavaThread::current()->thread_state() == _thread_in_vm,
1868          "Java Thread is not running in vm");
1869   GET_FIELDHOLDER_FIELD(java_thread, get_thread_status, JavaThreadStatus::NEW /* not initialized */);
1870 }
1871 
1872 ByteSize java_lang_Thread::thread_id_offset() {
1873   return in_ByteSize(_tid_offset);
1874 }
1875 
1876 oop java_lang_Thread::park_blocker(oop java_thread) {
1877   return java_thread->obj_field_acquire(_park_blocker_offset);
1878 }
1879 
1880 struct LockInfo {
1881   enum { // should be synced with jdk.internal.vm.ThreadSnapshot.ThreadLock constants
1882     PARKING_TO_WAIT = 0,
1883     ELIMINATED_SCALAR_REPLACED = 1,
1884     ELIMINATED_MONITOR = 2,
1885     LOCKED = 3,
1886     WAITING_TO_LOCK = 4,
1887     WAITING_ON = 5,
1888     WAITING_TO_RELOCK = 6,
1889     OWNABLE_SYNCHRONIZER = 7,
1890   };
1891 
1892   int _depth;
1893   int _type;
1894   oop _obj;
1895 
1896   LockInfo(int depth, int type, oop obj) : _depth(depth), _type(type), _obj(obj) {}
1897   LockInfo() : _depth(0), _type(0), _obj(nullptr) {}
1898 };
1899 
1900 class GetThreadSnapshotClosure : public HandshakeClosure {
1901 public:
1902   Handle _java_thread;
1903   JavaThread* _thread;
1904   int _depth;
1905   bool _retry_handshake;
1906   GrowableArray<Method*>* _methods;
1907   GrowableArray<int>* _bcis;
1908   JavaThreadStatus _thread_status;
1909   oop _name;
1910   bool _with_locks;
1911   bool _found_first_lock;
1912   GrowableArray<LockInfo>* _locks;
1913 
1914   GetThreadSnapshotClosure(Handle java_thread, JavaThread* thread, bool with_locks) :
1915       HandshakeClosure("GetThreadSnapshotClosure"), _java_thread(java_thread), _thread(thread),
1916       _depth(0), _retry_handshake(false),
1917       _methods(nullptr), _bcis(nullptr),
1918       _thread_status(), _name(nullptr),
1919       _with_locks(with_locks), _found_first_lock(false), _locks(nullptr) { }
1920   virtual ~GetThreadSnapshotClosure() {
1921     delete _methods;
1922     delete _bcis;
1923     if (_locks != nullptr) {
1924       delete _locks;
1925     }
1926   }
1927 
1928   bool read_reset_retry() {
1929     bool ret = _retry_handshake;
1930     // If we re-execute the handshake this method need to return false
1931     // when the handshake cannot be performed. (E.g. thread terminating)
1932     _retry_handshake = false;
1933     return ret;
1934   }
1935 
1936   void detect_locks(javaVFrame* jvf, int depth) {
1937     Thread* current = Thread::current();
1938 
1939     if (depth == 0 && !_found_first_lock) {
1940       // See javaVFrame::print_lock_info_on() for some other cases:
1941       // "waiting to re-lock in wait", "waiting on the Class initialization monitor".
1942 
1943       // If this is the first frame and it is java.lang.Object.wait(...)
1944       // then print out the receiver.
1945       if (jvf->method()->name() == vmSymbols::wait_name() &&
1946           jvf->method()->method_holder()->name() == vmSymbols::java_lang_Object()) {
1947         StackValueCollection* locs = jvf->locals();
1948         if (locs->is_empty()) {
1949           _locks->push(LockInfo(depth, LockInfo::WAITING_ON, nullptr));
1950         } else {
1951           int type = LockInfo::WAITING_ON;
1952           StackValue* sv = locs->at(0);
1953           if (sv->type() == T_OBJECT) {
1954             Handle o = locs->at(0)->get_obj();
1955             if (_thread_status == JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER) {
1956               type = LockInfo::WAITING_TO_RELOCK;;
1957             }
1958             _locks->push(LockInfo(depth, type, o()));
1959           }
1960         }
1961         _found_first_lock = true;
1962       } else {
1963         oop park_blocker = java_lang_Thread::park_blocker(_java_thread());
1964         if (park_blocker != nullptr) {
1965           _locks->push(LockInfo(depth, LockInfo::PARKING_TO_WAIT, park_blocker));
1966           if (park_blocker->is_a(vmClasses::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass())) {
1967             oop owner = java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(park_blocker);
1968             if (owner != nullptr) {
1969               _locks->push(LockInfo(depth, LockInfo::OWNABLE_SYNCHRONIZER, owner));
1970             }
1971           }
1972           _found_first_lock = true;
1973         }
1974       }
1975     }
1976 
1977     GrowableArray<MonitorInfo*>* mons = jvf->monitors();
1978     if (!mons->is_empty()) {
1979       for (int index = (mons->length() - 1); index >= 0; index--) {
1980         MonitorInfo* monitor = mons->at(index);
1981         if (monitor->eliminated() && jvf->is_compiled_frame()) { // Eliminated in compiled code
1982           if (monitor->owner_is_scalar_replaced()) {
1983             Klass* k = java_lang_Class::as_Klass(monitor->owner_klass());
1984             _locks->push(LockInfo(depth, LockInfo::ELIMINATED_SCALAR_REPLACED, k->klass_holder()));
1985           } else {
1986             Handle obj(current, monitor->owner());
1987             if (obj() != nullptr) {
1988               _locks->push(LockInfo(depth, LockInfo::ELIMINATED_MONITOR, obj()));
1989             }
1990           }
1991           continue;
1992         }
1993         if (monitor->owner() != nullptr) {
1994           // the monitor is associated with an object, i.e., it is locked
1995           int type = LockInfo::LOCKED;
1996 
1997           if (depth == 0 && !_found_first_lock) {
1998             ObjectMonitor* pending_moninor = java_lang_VirtualThread::is_instance(_java_thread())
1999                            ? java_lang_VirtualThread::current_pending_monitor(_java_thread())
2000                            : jvf->thread()->current_pending_monitor();
2001 
2002             markWord mark = monitor->owner()->mark();
2003             // The first stage of async deflation does not affect any field
2004             // used by this comparison so the ObjectMonitor* is usable here.
2005             if (mark.has_monitor()) {
2006               ObjectMonitor* mon = ObjectSynchronizer::read_monitor(current, monitor->owner(), mark);
2007               if (// if the monitor is null we must be in the process of locking
2008                   mon == nullptr ||
2009                   // we have marked ourself as pending on this monitor
2010                   mon == pending_moninor ||
2011                   // we are not the owner of this monitor
2012                   (_thread != nullptr && !mon->is_entered(_thread))) {
2013                 type = LockInfo::WAITING_TO_LOCK;
2014               }
2015             }
2016           }
2017           _locks->push(LockInfo(depth, type, monitor->owner()));
2018 
2019           _found_first_lock = true;
2020         }
2021       }
2022     }
2023   }
2024 
2025   void do_thread(Thread* th) override {
2026     if (!Thread::current()->is_Java_thread()) {
2027       _retry_handshake = true;
2028       return;
2029     }
2030 
2031     bool is_virtual = java_lang_VirtualThread::is_instance(_java_thread());
2032     if (_thread != nullptr) {
2033       if (is_virtual) {
2034         // mounted vthread, use carrier thread state
2035         oop carrier_thread = java_lang_VirtualThread::carrier_thread(_java_thread());
2036         _thread_status = java_lang_Thread::get_thread_status(carrier_thread);
2037       } else {
2038         _thread_status = java_lang_Thread::get_thread_status(_java_thread());
2039       }
2040     } else {
2041       // unmounted vthread
2042       int vt_state = java_lang_VirtualThread::state(_java_thread());
2043       _thread_status = java_lang_VirtualThread::map_state_to_thread_status(vt_state);
2044     }
2045     _name = java_lang_Thread::name(_java_thread());
2046 
2047     if (_thread != nullptr && !_thread->has_last_Java_frame()) {
2048       // stack trace is empty
2049       return;
2050     }
2051 
2052     bool walk_cont = false;
2053 
2054     if (is_virtual) {
2055       if (_thread != nullptr) {
2056         // if (thread->vthread() != _java_thread()) // We might be inside a System.executeOnCarrierThread
2057         const ContinuationEntry* ce = _thread->vthread_continuation();
2058         if (ce == nullptr || ce->cont_oop(_thread) != java_lang_VirtualThread::continuation(_java_thread())) {
2059           // TODO: handle
2060         }
2061       }
2062     } else {
2063       walk_cont = (_thread->vthread_continuation() != nullptr);
2064     }
2065 
2066     ResourceMark rm(Thread::current());
2067 
2068     const int max_depth = MaxJavaStackTraceDepth;
2069     const bool skip_hidden = !ShowHiddenFrames;
2070 
2071     // Pick minimum length that will cover most cases
2072     int init_length = 64;
2073     _methods = new (mtInternal) GrowableArray<Method*>(init_length, mtInternal);
2074     _bcis = new (mtInternal) GrowableArray<int>(init_length, mtInternal);
2075 
2076     if (_with_locks) {
2077       _locks = new (mtInternal) GrowableArray<LockInfo>(init_length, mtInternal);
2078     }
2079     int total_count = 0;
2080 
2081     vframeStream vfst(_thread != nullptr
2082         ? vframeStream(_thread, false, false, walk_cont)
2083         : vframeStream(java_lang_VirtualThread::continuation(_java_thread())));
2084 
2085     for (;
2086         !vfst.at_end() && (max_depth == 0 || max_depth != total_count);
2087         vfst.next()) {
2088       if (_with_locks) {
2089         detect_locks(vfst.asJavaVFrame(), total_count);
2090       }
2091       if (skip_hidden && (vfst.method()->is_hidden() ||
2092         vfst.method()->is_continuation_enter_intrinsic())) {
2093         continue;
2094       }
2095       _methods->push(vfst.method());
2096       _bcis->push(vfst.bci());
2097       total_count++;
2098     }
2099 
2100     _depth = total_count;
2101   }
2102 };
2103 
2104 oop java_lang_Thread::async_get_stack_trace(oop java_thread, TRAPS) {
2105   ThreadsListHandle tlh(JavaThread::current());
2106   JavaThread* thread;
2107   bool is_virtual = java_lang_VirtualThread::is_instance(java_thread);
2108   if (is_virtual) {
2109     oop carrier_thread = java_lang_VirtualThread::carrier_thread(java_thread);
2110     if (carrier_thread == nullptr) {
2111       return nullptr;
2112     }
2113     thread = java_lang_Thread::thread(carrier_thread);
2114   } else {
2115     thread = java_lang_Thread::thread(java_thread);
2116   }
2117   if (thread == nullptr) {
2118     return nullptr;
2119   }
2120 
2121   class GetStackTraceClosure : public HandshakeClosure {
2122   public:
2123     const Handle _java_thread;
2124     int _depth;
2125     bool _retry_handshake;
2126     GrowableArray<Method*>* _methods;
2127     GrowableArray<int>*     _bcis;
2128 
2129     GetStackTraceClosure(Handle java_thread) :
2130         HandshakeClosure("GetStackTraceClosure"), _java_thread(java_thread), _depth(0), _retry_handshake(false),
2131         _methods(nullptr), _bcis(nullptr) {
2132     }
2133     ~GetStackTraceClosure() {
2134       delete _methods;
2135       delete _bcis;
2136     }
2137 
2138     bool read_reset_retry() {
2139       bool ret = _retry_handshake;
2140       // If we re-execute the handshake this method need to return false
2141       // when the handshake cannot be performed. (E.g. thread terminating)
2142       _retry_handshake = false;
2143       return ret;
2144     }
2145 
2146     void do_thread(Thread* th) {
2147       if (!Thread::current()->is_Java_thread()) {
2148         _retry_handshake = true;
2149         return;
2150       }
2151 
2152       JavaThread* thread = JavaThread::cast(th);
2153 
2154       if (!thread->has_last_Java_frame()) {
2155         return;
2156       }
2157 
2158       bool carrier = false;
2159       if (java_lang_VirtualThread::is_instance(_java_thread())) {
2160         // if (thread->vthread() != _java_thread()) // We might be inside a System.executeOnCarrierThread
2161         const ContinuationEntry* ce = thread->vthread_continuation();
2162         if (ce == nullptr || ce->cont_oop(thread) != java_lang_VirtualThread::continuation(_java_thread())) {
2163           return; // not mounted
2164         }
2165       } else {
2166         carrier = (thread->vthread_continuation() != nullptr);
2167       }
2168 
2169       const int max_depth = MaxJavaStackTraceDepth;
2170       const bool skip_hidden = !ShowHiddenFrames;
2171 
2172       // Pick minimum length that will cover most cases
2173       int init_length = 64;
2174       _methods = new (mtInternal) GrowableArray<Method*>(init_length, mtInternal);
2175       _bcis = new (mtInternal) GrowableArray<int>(init_length, mtInternal);
2176 
2177       int total_count = 0;
2178       for (vframeStream vfst(thread, false, false, carrier); // we don't process frames as we don't care about oops
2179            !vfst.at_end() && (max_depth == 0 || max_depth != total_count);
2180            vfst.next()) {
2181 
2182         if (skip_hidden && (vfst.method()->is_hidden() ||
2183                             vfst.method()->is_continuation_enter_intrinsic())) {
2184           continue;
2185         }
2186 
2187         _methods->push(vfst.method());
2188         _bcis->push(vfst.bci());
2189         total_count++;
2190       }
2191 
2192       _depth = total_count;
2193     }
2194   };
2195 
2196   // Handshake with target
2197   ResourceMark rm(THREAD);
2198   HandleMark   hm(THREAD);
2199   GetStackTraceClosure gstc(Handle(THREAD, java_thread));
2200   do {
2201    Handshake::execute(&gstc, &tlh, thread);
2202   } while (gstc.read_reset_retry());
2203 
2204   // Stop if no stack trace is found.
2205   if (gstc._depth == 0) {
2206     return nullptr;
2207   }
2208 
2209   // Convert to StackTraceElement array
2210   InstanceKlass* k = vmClasses::StackTraceElement_klass();
2211   assert(k != nullptr, "must be loaded in 1.4+");
2212   if (k->should_be_initialized()) {
2213     k->initialize(CHECK_NULL);
2214   }
2215   objArrayHandle trace = oopFactory::new_objArray_handle(k, gstc._depth, CHECK_NULL);
2216 
2217   for (int i = 0; i < gstc._depth; i++) {
2218     methodHandle method(THREAD, gstc._methods->at(i));
2219     oop element = java_lang_StackTraceElement::create(method,
2220                                                       gstc._bcis->at(i),
2221                                                       CHECK_NULL);
2222     trace->obj_at_put(i, element);
2223   }
2224 
2225   return trace();
2226 }
2227 
2228 class jdk_internal_vm_ThreadLock: AllStatic {
2229   static bool _inited;
2230   static int _depth_offset;
2231   static int _typeOrdinal_offset;
2232   static int _obj_offset;
2233 
2234   static void compute_offsets(InstanceKlass * klass, TRAPS) {
2235     JavaClasses::compute_offset(_depth_offset, klass, "depth", vmSymbols::int_signature(), false);
2236     JavaClasses::compute_offset(_typeOrdinal_offset, klass, "typeOrdinal", vmSymbols::int_signature(), false);
2237     JavaClasses::compute_offset(_obj_offset, klass, "obj", vmSymbols::object_signature(), false);
2238   }
2239 public:
2240   static void init(InstanceKlass* klass, TRAPS) {
2241     if (!_inited) {
2242       compute_offsets(klass, CHECK);
2243       _inited = true;
2244     }
2245   }
2246 
2247   static Handle allocate(InstanceKlass* klass, TRAPS) {
2248     init(klass, CHECK_NH);
2249     return klass->allocate_instance_handle(CHECK_NH);
2250   }
2251 
2252   static void set_depth(oop thread_lock, int depth) {
2253     thread_lock->int_field_put(_depth_offset, depth);
2254   }
2255   static void set_type(oop thread_lock, int type_ordinal) {
2256     thread_lock->int_field_put(_typeOrdinal_offset, type_ordinal);
2257   }
2258   static void set_lock_object(oop thread_lock, oop obj) {
2259     thread_lock->obj_field_put(_obj_offset, obj);
2260   }
2261 };
2262 
2263 bool jdk_internal_vm_ThreadLock::_inited = false;
2264 int jdk_internal_vm_ThreadLock::_depth_offset;
2265 int jdk_internal_vm_ThreadLock::_typeOrdinal_offset;
2266 int jdk_internal_vm_ThreadLock::_obj_offset;
2267 
2268 class jdk_internal_vm_ThreadSnapshot: AllStatic {
2269   static bool _inited;
2270   static int _name_offset;
2271   static int _threadStatus_offset;
2272   static int _stackTrace_offset;
2273   static int _locks_offset;
2274 
2275   static void compute_offsets(InstanceKlass* klass, TRAPS) {
2276     JavaClasses::compute_offset(_name_offset, klass, "name", vmSymbols::string_signature(), false);
2277     JavaClasses::compute_offset(_threadStatus_offset, klass, "threadStatus", vmSymbols::int_signature(), false);
2278     JavaClasses::compute_offset(_stackTrace_offset, klass, "stackTrace", vmSymbols::java_lang_StackTraceElement_array(), false);
2279     JavaClasses::compute_offset(_locks_offset, klass, "locks", vmSymbols::jdk_internal_vm_ThreadLock_array(), false);
2280   }
2281 public:
2282   static void init(InstanceKlass* klass, TRAPS) {
2283     if (!_inited) {
2284       compute_offsets(klass, CHECK);
2285       _inited = true;
2286     }
2287   }
2288 
2289   static Handle allocate(InstanceKlass* klass, TRAPS) {
2290     init(klass, CHECK_NH);
2291     return klass->allocate_instance_handle(CHECK_NH);
2292   }
2293 
2294   static void set_name(oop snapshot, oop name) {
2295     snapshot->obj_field_put(_name_offset, name);
2296   }
2297   static void set_thread_status(oop snapshot, int status) {
2298     snapshot->int_field_put(_threadStatus_offset, status);
2299   }
2300   static void set_stack_trace(oop snapshot, oop trace) {
2301     snapshot->obj_field_put(_stackTrace_offset, trace);
2302   }
2303   static void set_locks(oop snapshot, oop locks) {
2304     snapshot->obj_field_put(_locks_offset, locks);
2305   }
2306 };
2307 
2308 bool jdk_internal_vm_ThreadSnapshot::_inited = false;
2309 int jdk_internal_vm_ThreadSnapshot::_name_offset;
2310 int jdk_internal_vm_ThreadSnapshot::_threadStatus_offset;
2311 int jdk_internal_vm_ThreadSnapshot::_stackTrace_offset;
2312 int jdk_internal_vm_ThreadSnapshot::_locks_offset;
2313 
2314 oop java_lang_Thread::get_thread_snapshot(jobject jthread, bool with_locks, TRAPS) {
2315   ThreadsListHandle tlh(JavaThread::current());
2316 
2317   ResourceMark rm(THREAD);
2318   HandleMark   hm(THREAD);
2319   Handle java_thread(THREAD, JNIHandles::resolve(jthread));
2320 
2321   // wrapper to auto delete JvmtiVTMSTransitionDisabler
2322   class TransitionDisabler {
2323     JvmtiVTMSTransitionDisabler* _transition_disabler;
2324   public:
2325     TransitionDisabler() : _transition_disabler(nullptr) {}
2326     ~TransitionDisabler() {
2327       reset();
2328     }
2329     void init(jobject jthread) {
2330       _transition_disabler = new (mtInternal) JvmtiVTMSTransitionDisabler(jthread);
2331     }
2332     void reset() {
2333       if (_transition_disabler != nullptr) {
2334         delete _transition_disabler;
2335         _transition_disabler = nullptr;
2336       }
2337     }
2338   } transition_disabler;
2339 
2340   JavaThread* thread = nullptr;
2341   bool is_virtual = java_lang_VirtualThread::is_instance(java_thread());
2342 
2343   if (is_virtual) {
2344     // 1st need to disable mount/unmount transitions
2345     transition_disabler.init(jthread);
2346 
2347     oop carrier_thread = java_lang_VirtualThread::carrier_thread(java_thread());
2348     if (carrier_thread != nullptr) {
2349       thread = java_lang_Thread::thread(carrier_thread);
2350     }
2351   } else {
2352     thread = java_lang_Thread::thread(java_thread());
2353   }
2354 
2355   // Handshake with target
2356   GetThreadSnapshotClosure cl(java_thread, thread, with_locks);
2357   if (thread == nullptr) {
2358     // unmounted vthread, execute on the current thread
2359     cl.do_thread(nullptr);
2360   } else {
2361     do {
2362       Handshake::execute(&cl, &tlh, thread);
2363     } while (cl.read_reset_retry());
2364   }
2365 
2366   // Handle thread name
2367   Handle thread_name(THREAD, cl._name);
2368 
2369   // Convert to StackTraceElement array
2370   InstanceKlass* ste_klass = vmClasses::StackTraceElement_klass();
2371   assert(ste_klass != nullptr, "must be loaded in 1.4+");
2372   if (ste_klass->should_be_initialized()) {
2373     ste_klass->initialize(CHECK_NULL);
2374   }
2375 
2376   int max_locks = cl._locks != nullptr ? cl._locks->length() : 0;
2377 
2378   InstanceKlass* lock_klass = nullptr;
2379   if (with_locks) {
2380     Symbol* sym = vmSymbols::jdk_internal_vm_ThreadLock();
2381     Klass* k = SystemDictionary::resolve_or_fail(sym, true, CHECK_NULL);
2382     lock_klass = InstanceKlass::cast(k);
2383   }
2384 
2385   objArrayHandle trace = oopFactory::new_objArray_handle(ste_klass, cl._depth, CHECK_NULL);
2386 
2387   for (int i = 0; i < cl._depth; i++) {
2388     methodHandle method(THREAD, cl._methods->at(i));
2389     oop element = java_lang_StackTraceElement::create(method, cl._bcis->at(i), CHECK_NULL);
2390     trace->obj_at_put(i, element);
2391   }
2392 
2393   objArrayHandle locks;
2394   int lock_index = 0;
2395   if (with_locks && max_locks > 0) {
2396     locks = oopFactory::new_objArray_handle(lock_klass, max_locks, CHECK_NULL);
2397     for (int n = 0; n < max_locks; n++) {
2398       LockInfo* lock_info = cl._locks->adr_at(lock_index++);
2399       Handle lock_object = Handle(THREAD, lock_info->_obj);
2400 
2401       Handle lock = jdk_internal_vm_ThreadLock::allocate(lock_klass, CHECK_NULL);
2402       jdk_internal_vm_ThreadLock::set_depth(lock(), lock_info->_depth);
2403       jdk_internal_vm_ThreadLock::set_type(lock(), lock_info->_type);
2404       jdk_internal_vm_ThreadLock::set_lock_object(lock(), lock_object());
2405       locks->obj_at_put(n, lock());
2406     }
2407   }
2408 
2409   // call static StackTraceElement[] StackTraceElement.of(StackTraceElement[] stackTrace)
2410   // to properly initialize STE.
2411   {
2412     JavaValue result(T_OBJECT);
2413     JavaCalls::call_static(&result,
2414                            ste_klass,
2415                            vmSymbols::java_lang_StackTraceElement_of_name(),
2416                            vmSymbols::java_lang_StackTraceElement_of_signature(),
2417                            trace,
2418                            CHECK_NULL);
2419     // the method return the same trace object
2420   }
2421 
2422   // all oops are handled, can enable transitions.
2423   transition_disabler.reset();
2424 
2425   Symbol* snapshot_name = vmSymbols::jdk_internal_vm_ThreadSnapshot();
2426   Klass* snapshot_klass = SystemDictionary::resolve_or_fail(snapshot_name, true, CHECK_NULL);
2427   if (snapshot_klass->should_be_initialized()) {
2428     snapshot_klass->initialize(CHECK_NULL);
2429   }
2430 
2431   Handle snapshot = jdk_internal_vm_ThreadSnapshot::allocate(InstanceKlass::cast(snapshot_klass), CHECK_NULL);
2432   jdk_internal_vm_ThreadSnapshot::set_name(snapshot(), thread_name());
2433   jdk_internal_vm_ThreadSnapshot::set_thread_status(snapshot(), (int)cl._thread_status);
2434   jdk_internal_vm_ThreadSnapshot::set_stack_trace(snapshot(), trace());
2435   jdk_internal_vm_ThreadSnapshot::set_locks(snapshot(), locks());
2436   return snapshot();
2437 }
2438 
2439 const char* java_lang_Thread::thread_status_name(oop java_thread) {
2440   JavaThreadStatus status = get_thread_status(java_thread);
2441   switch (status) {
2442     case JavaThreadStatus::NEW                      : return "NEW";
2443     case JavaThreadStatus::RUNNABLE                 : return "RUNNABLE";
2444     case JavaThreadStatus::SLEEPING                 : return "TIMED_WAITING (sleeping)";
2445     case JavaThreadStatus::IN_OBJECT_WAIT           : return "WAITING (on object monitor)";
2446     case JavaThreadStatus::IN_OBJECT_WAIT_TIMED     : return "TIMED_WAITING (on object monitor)";
2447     case JavaThreadStatus::PARKED                   : return "WAITING (parking)";
2448     case JavaThreadStatus::PARKED_TIMED             : return "TIMED_WAITING (parking)";
2449     case JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
2450     case JavaThreadStatus::TERMINATED               : return "TERMINATED";
2451     default                       : return "UNKNOWN";
2452   };
2453 }
2454 int java_lang_ThreadGroup::_parent_offset;
2455 int java_lang_ThreadGroup::_name_offset;
2456 int java_lang_ThreadGroup::_maxPriority_offset;
2457 int java_lang_ThreadGroup::_daemon_offset;
2458 
2459 oop  java_lang_ThreadGroup::parent(oop java_thread_group) {
2460   assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2461   return java_thread_group->obj_field(_parent_offset);
2462 }
2463 
2464 // ("name as oop" accessor is not necessary)
2465 
2466 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
2467   oop name = java_thread_group->obj_field(_name_offset);
2468   // ThreadGroup.name can be null
2469   if (name != nullptr) {
2470     return java_lang_String::as_utf8_string(name);
2471   }
2472   return nullptr;
2473 }
2474 
2475 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
2476   assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2477   return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
2478 }
2479 
2480 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
2481   assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2482   return java_thread_group->bool_field(_daemon_offset) != 0;
2483 }
2484 
2485 #define THREADGROUP_FIELDS_DO(macro) \
2486   macro(_parent_offset,      k, vmSymbols::parent_name(),      threadgroup_signature,         false); \
2487   macro(_name_offset,        k, vmSymbols::name_name(),        string_signature,              false); \
2488   macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature,                 false); \
2489   macro(_daemon_offset,      k, vmSymbols::daemon_name(),      bool_signature,                false);
2490 
2491 void java_lang_ThreadGroup::compute_offsets() {
2492   assert(_parent_offset == 0, "offsets should be initialized only once");
2493 
2494   InstanceKlass* k = vmClasses::ThreadGroup_klass();
2495   THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2496 }
2497 
2498 #if INCLUDE_CDS
2499 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
2500   THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2501 }
2502 #endif
2503 
2504 
2505 // java_lang_VirtualThread
2506 
2507 int java_lang_VirtualThread::static_vthread_scope_offset;
2508 int java_lang_VirtualThread::_carrierThread_offset;
2509 int java_lang_VirtualThread::_continuation_offset;
2510 int java_lang_VirtualThread::_state_offset;
2511 int java_lang_VirtualThread::_next_offset;
2512 int java_lang_VirtualThread::_onWaitingList_offset;
2513 int java_lang_VirtualThread::_notified_offset;
2514 int java_lang_VirtualThread::_interruptible_wait_offset;
2515 int java_lang_VirtualThread::_timeout_offset;
2516 int java_lang_VirtualThread::_objectWaiter_offset;
2517 
2518 #define VTHREAD_FIELDS_DO(macro) \
2519   macro(static_vthread_scope_offset,       k, "VTHREAD_SCOPE",      continuationscope_signature, true);  \
2520   macro(_carrierThread_offset,             k, "carrierThread",      thread_signature,            false); \
2521   macro(_continuation_offset,              k, "cont",               continuation_signature,      false); \
2522   macro(_state_offset,                     k, "state",              int_signature,               false); \
2523   macro(_next_offset,                      k, "next",               vthread_signature,           false); \
2524   macro(_onWaitingList_offset,             k, "onWaitingList",      bool_signature,              false); \
2525   macro(_notified_offset,                  k, "notified",           bool_signature,              false); \
2526   macro(_interruptible_wait_offset,        k, "interruptableWait",  bool_signature,              false); \
2527   macro(_timeout_offset,                   k, "timeout",            long_signature,              false);
2528 
2529 
2530 void java_lang_VirtualThread::compute_offsets() {
2531   InstanceKlass* k = vmClasses::VirtualThread_klass();
2532   VTHREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2533   VTHREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2534 }
2535 
2536 bool java_lang_VirtualThread::is_instance(oop obj) {
2537   return obj != nullptr && is_subclass(obj->klass());
2538 }
2539 
2540 oop java_lang_VirtualThread::carrier_thread(oop vthread) {
2541   oop thread = vthread->obj_field(_carrierThread_offset);
2542   return thread;
2543 }
2544 
2545 oop java_lang_VirtualThread::continuation(oop vthread) {
2546   oop cont = vthread->obj_field(_continuation_offset);
2547   return cont;
2548 }
2549 
2550 int java_lang_VirtualThread::state(oop vthread) {
2551   return vthread->int_field_acquire(_state_offset);
2552 }
2553 
2554 void java_lang_VirtualThread::set_state(oop vthread, int state) {
2555   vthread->release_int_field_put(_state_offset, state);
2556 }
2557 
2558 int java_lang_VirtualThread::cmpxchg_state(oop vthread, int old_state, int new_state) {
2559   jint* addr = vthread->field_addr<jint>(_state_offset);
2560   int res = Atomic::cmpxchg(addr, old_state, new_state);
2561   return res;
2562 }
2563 
2564 oop java_lang_VirtualThread::next(oop vthread) {
2565   return vthread->obj_field(_next_offset);
2566 }
2567 
2568 void java_lang_VirtualThread::set_next(oop vthread, oop next_vthread) {
2569   vthread->obj_field_put(_next_offset, next_vthread);
2570 }
2571 
2572 // Add vthread to the waiting list if it's not already in it. Multiple threads
2573 // could be trying to add vthread to the list at the same time, so we control
2574 // access with a cmpxchg on onWaitingList. The winner adds vthread to the list.
2575 // Method returns true if we added vthread to the list, false otherwise.
2576 bool java_lang_VirtualThread::set_onWaitingList(oop vthread, OopHandle& list_head) {
2577   jboolean* addr = vthread->field_addr<jboolean>(_onWaitingList_offset);
2578   jboolean vthread_on_list = Atomic::load(addr);
2579   if (!vthread_on_list) {
2580     vthread_on_list = Atomic::cmpxchg(addr, (jboolean)JNI_FALSE, (jboolean)JNI_TRUE);
2581     if (!vthread_on_list) {
2582       for (;;) {
2583         oop head = list_head.resolve();
2584         java_lang_VirtualThread::set_next(vthread, head);
2585         if (list_head.cmpxchg(head, vthread) == head) return true;
2586       }
2587     }
2588   }
2589   return false; // already on waiting list
2590 }
2591 
2592 void java_lang_VirtualThread::set_notified(oop vthread, jboolean value) {
2593   vthread->bool_field_put_volatile(_notified_offset, value);
2594 }
2595 
2596 void java_lang_VirtualThread::set_interruptible_wait(oop vthread, jboolean value) {
2597   vthread->bool_field_put_volatile(_interruptible_wait_offset, value);
2598 }
2599 
2600 jlong java_lang_VirtualThread::timeout(oop vthread) {
2601   return vthread->long_field(_timeout_offset);
2602 }
2603 
2604 void java_lang_VirtualThread::set_timeout(oop vthread, jlong value) {
2605   vthread->long_field_put(_timeout_offset, value);
2606 }
2607 
2608 JavaThreadStatus java_lang_VirtualThread::map_state_to_thread_status(int state) {
2609   JavaThreadStatus status = JavaThreadStatus::NEW;
2610   switch (state & ~SUSPENDED) {
2611     case NEW:
2612       status = JavaThreadStatus::NEW;
2613       break;
2614     case STARTED:
2615     case RUNNING:
2616     case PARKING:
2617     case TIMED_PARKING:
2618     case UNPARKED:
2619     case YIELDING:
2620     case YIELDED:
2621     case UNBLOCKED:
2622     case WAITING:
2623     case TIMED_WAITING:
2624       status = JavaThreadStatus::RUNNABLE;
2625       break;
2626     case PARKED:
2627     case PINNED:
2628       status = JavaThreadStatus::PARKED;
2629       break;
2630     case TIMED_PARKED:
2631     case TIMED_PINNED:
2632       status = JavaThreadStatus::PARKED_TIMED;
2633       break;
2634     case BLOCKING:
2635     case BLOCKED:
2636       status = JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER;
2637       break;
2638     case WAIT:
2639       status = JavaThreadStatus::IN_OBJECT_WAIT;
2640       break;
2641     case TIMED_WAIT:
2642       status = JavaThreadStatus::IN_OBJECT_WAIT_TIMED;
2643       break;
2644     case TERMINATED:
2645       status = JavaThreadStatus::TERMINATED;
2646       break;
2647     default:
2648       ShouldNotReachHere();
2649   }
2650   return status;
2651 }
2652 
2653 ObjectMonitor* java_lang_VirtualThread::current_pending_monitor(oop vthread) {
2654   ObjectWaiter* waiter = objectWaiter(vthread);
2655   if (waiter != nullptr && waiter->at_monitorenter()) {
2656     return waiter->monitor();
2657   }
2658   return nullptr;
2659 }
2660 
2661 ObjectMonitor* java_lang_VirtualThread::current_waiting_monitor(oop vthread) {
2662   ObjectWaiter* waiter = objectWaiter(vthread);
2663   if (waiter != nullptr && waiter->is_wait()) {
2664     return waiter->monitor();
2665   }
2666   return nullptr;
2667 }
2668 
2669 bool java_lang_VirtualThread::is_preempted(oop vthread) {
2670   oop continuation = java_lang_VirtualThread::continuation(vthread);
2671   assert(continuation != nullptr, "vthread with no continuation");
2672   stackChunkOop chunk = jdk_internal_vm_Continuation::tail(continuation);
2673   return chunk != nullptr && chunk->preempted();
2674 }
2675 
2676 #if INCLUDE_CDS
2677 void java_lang_VirtualThread::serialize_offsets(SerializeClosure* f) {
2678    VTHREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2679    VTHREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
2680 }
2681 #endif
2682 
2683 // java_lang_Throwable
2684 
2685 int java_lang_Throwable::_backtrace_offset;
2686 int java_lang_Throwable::_detailMessage_offset;
2687 int java_lang_Throwable::_stackTrace_offset;
2688 int java_lang_Throwable::_depth_offset;
2689 int java_lang_Throwable::_cause_offset;
2690 int java_lang_Throwable::_static_unassigned_stacktrace_offset;
2691 
2692 #define THROWABLE_FIELDS_DO(macro) \
2693   macro(_backtrace_offset,     k, "backtrace",     object_signature,                  false); \
2694   macro(_detailMessage_offset, k, "detailMessage", string_signature,                  false); \
2695   macro(_stackTrace_offset,    k, "stackTrace",    java_lang_StackTraceElement_array, false); \
2696   macro(_depth_offset,         k, "depth",         int_signature,                     false); \
2697   macro(_cause_offset,         k, "cause",         throwable_signature,               false); \
2698   macro(_static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
2699 
2700 void java_lang_Throwable::compute_offsets() {
2701   InstanceKlass* k = vmClasses::Throwable_klass();
2702   THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2703 }
2704 
2705 #if INCLUDE_CDS
2706 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
2707   THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2708 }
2709 #endif
2710 
2711 oop java_lang_Throwable::unassigned_stacktrace() {
2712   InstanceKlass* ik = vmClasses::Throwable_klass();
2713   oop base = ik->static_field_base_raw();
2714   return base->obj_field(_static_unassigned_stacktrace_offset);
2715 }
2716 
2717 oop java_lang_Throwable::backtrace(oop throwable) {
2718   return throwable->obj_field_acquire(_backtrace_offset);
2719 }
2720 
2721 
2722 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
2723   throwable->release_obj_field_put(_backtrace_offset, value);
2724 }
2725 
2726 int java_lang_Throwable::depth(oop throwable) {
2727   return throwable->int_field(_depth_offset);
2728 }
2729 
2730 void java_lang_Throwable::set_depth(oop throwable, int value) {
2731   throwable->int_field_put(_depth_offset, value);
2732 }
2733 
2734 oop java_lang_Throwable::message(oop throwable) {
2735   return throwable->obj_field(_detailMessage_offset);
2736 }
2737 
2738 const char* java_lang_Throwable::message_as_utf8(oop throwable) {
2739   oop msg = java_lang_Throwable::message(throwable);
2740   const char* msg_utf8 = nullptr;
2741   if (msg != nullptr) {
2742     msg_utf8 = java_lang_String::as_utf8_string(msg);
2743   }
2744   return msg_utf8;
2745 }
2746 
2747 oop java_lang_Throwable::cause(oop throwable) {
2748   return throwable->obj_field(_cause_offset);
2749 }
2750 
2751 void java_lang_Throwable::set_message(oop throwable, oop value) {
2752   throwable->obj_field_put(_detailMessage_offset, value);
2753 }
2754 
2755 
2756 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
2757   throwable->obj_field_put(_stackTrace_offset, st_element_array);
2758 }
2759 
2760 void java_lang_Throwable::clear_stacktrace(oop throwable) {
2761   set_stacktrace(throwable, nullptr);
2762 }
2763 
2764 
2765 void java_lang_Throwable::print(oop throwable, outputStream* st) {
2766   ResourceMark rm;
2767   Klass* k = throwable->klass();
2768   assert(k != nullptr, "just checking");
2769   st->print("%s", k->external_name());
2770   oop msg = message(throwable);
2771   if (msg != nullptr) {
2772     st->print(": %s", java_lang_String::as_utf8_string(msg));
2773   }
2774 }
2775 
2776 // After this many redefines, the stack trace is unreliable.
2777 const int MAX_VERSION = USHRT_MAX;
2778 
2779 static inline bool version_matches(Method* method, int version) {
2780   assert(version < MAX_VERSION, "version is too big");
2781   return method != nullptr && (method->constants()->version() == version);
2782 }
2783 
2784 // This class provides a simple wrapper over the internal structure of
2785 // exception backtrace to insulate users of the backtrace from needing
2786 // to know what it looks like.
2787 // The code of this class is not GC safe. Allocations can only happen
2788 // in expand().
2789 class BacktraceBuilder: public StackObj {
2790  friend class BacktraceIterator;
2791  private:
2792   Handle          _backtrace;
2793   objArrayOop     _head;
2794   typeArrayOop    _methods;
2795   typeArrayOop    _bcis;
2796   objArrayOop     _mirrors;
2797   typeArrayOop    _names; // Needed to insulate method name against redefinition.
2798   // True if the top frame of the backtrace is omitted because it shall be hidden.
2799   bool            _has_hidden_top_frame;
2800   int             _index;
2801   NoSafepointVerifier _nsv;
2802 
2803   enum {
2804     trace_methods_offset = java_lang_Throwable::trace_methods_offset,
2805     trace_bcis_offset    = java_lang_Throwable::trace_bcis_offset,
2806     trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
2807     trace_names_offset   = java_lang_Throwable::trace_names_offset,
2808     trace_conts_offset   = java_lang_Throwable::trace_conts_offset,
2809     trace_next_offset    = java_lang_Throwable::trace_next_offset,
2810     trace_hidden_offset  = java_lang_Throwable::trace_hidden_offset,
2811     trace_size           = java_lang_Throwable::trace_size,
2812     trace_chunk_size     = java_lang_Throwable::trace_chunk_size
2813   };
2814 
2815   // get info out of chunks
2816   static typeArrayOop get_methods(objArrayHandle chunk) {
2817     typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
2818     assert(methods != nullptr, "method array should be initialized in backtrace");
2819     return methods;
2820   }
2821   static typeArrayOop get_bcis(objArrayHandle chunk) {
2822     typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
2823     assert(bcis != nullptr, "bci array should be initialized in backtrace");
2824     return bcis;
2825   }
2826   static objArrayOop get_mirrors(objArrayHandle chunk) {
2827     objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
2828     assert(mirrors != nullptr, "mirror array should be initialized in backtrace");
2829     return mirrors;
2830   }
2831   static typeArrayOop get_names(objArrayHandle chunk) {
2832     typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2833     assert(names != nullptr, "names array should be initialized in backtrace");
2834     return names;
2835   }
2836   static bool has_hidden_top_frame(objArrayHandle chunk) {
2837     oop hidden = chunk->obj_at(trace_hidden_offset);
2838     return hidden != nullptr;
2839   }
2840 
2841  public:
2842 
2843   // constructor for new backtrace
2844   BacktraceBuilder(TRAPS): _head(nullptr), _methods(nullptr), _bcis(nullptr), _mirrors(nullptr), _names(nullptr), _has_hidden_top_frame(false) {
2845     expand(CHECK);
2846     _backtrace = Handle(THREAD, _head);
2847     _index = 0;
2848   }
2849 
2850   BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2851     _methods = get_methods(backtrace);
2852     _bcis = get_bcis(backtrace);
2853     _mirrors = get_mirrors(backtrace);
2854     _names = get_names(backtrace);
2855     _has_hidden_top_frame = has_hidden_top_frame(backtrace);
2856     assert(_methods->length() == _bcis->length() &&
2857            _methods->length() == _mirrors->length() &&
2858            _mirrors->length() == _names->length(),
2859            "method and source information arrays should match");
2860 
2861     // head is the preallocated backtrace
2862     _head = backtrace();
2863     _backtrace = Handle(thread, _head);
2864     _index = 0;
2865   }
2866 
2867   void expand(TRAPS) {
2868     objArrayHandle old_head(THREAD, _head);
2869     PauseNoSafepointVerifier pnsv(&_nsv);
2870 
2871     objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2872     objArrayHandle new_head(THREAD, head);
2873 
2874     typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2875     typeArrayHandle new_methods(THREAD, methods);
2876 
2877     typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2878     typeArrayHandle new_bcis(THREAD, bcis);
2879 
2880     objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2881     objArrayHandle new_mirrors(THREAD, mirrors);
2882 
2883     typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2884     typeArrayHandle new_names(THREAD, names);
2885 
2886     if (!old_head.is_null()) {
2887       old_head->obj_at_put(trace_next_offset, new_head());
2888     }
2889     new_head->obj_at_put(trace_methods_offset, new_methods());
2890     new_head->obj_at_put(trace_bcis_offset, new_bcis());
2891     new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2892     new_head->obj_at_put(trace_names_offset, new_names());
2893     new_head->obj_at_put(trace_hidden_offset, nullptr);
2894 
2895     _head    = new_head();
2896     _methods = new_methods();
2897     _bcis = new_bcis();
2898     _mirrors = new_mirrors();
2899     _names  = new_names();
2900     _index = 0;
2901   }
2902 
2903   oop backtrace() {
2904     return _backtrace();
2905   }
2906 
2907   inline void push(Method* method, int bci, TRAPS) {
2908     // Smear the -1 bci to 0 since the array only holds unsigned
2909     // shorts.  The later line number lookup would just smear the -1
2910     // to a 0 even if it could be recorded.
2911     if (bci == SynchronizationEntryBCI) bci = 0;
2912 
2913     if (_index >= trace_chunk_size) {
2914       methodHandle mhandle(THREAD, method);
2915       expand(CHECK);
2916       method = mhandle();
2917     }
2918 
2919     _methods->ushort_at_put(_index, method->orig_method_idnum());
2920     _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2921 
2922     // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2923     // klass owning the symbols alive so their refcounts aren't decremented.
2924     Symbol* name = method->name();
2925     _names->symbol_at_put(_index, name);
2926 
2927     // We need to save the mirrors in the backtrace to keep the class
2928     // from being unloaded while we still have this stack trace.
2929     assert(method->method_holder()->java_mirror() != nullptr, "never push null for mirror");
2930     _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2931 
2932     _index++;
2933   }
2934 
2935   void set_has_hidden_top_frame() {
2936     if (!_has_hidden_top_frame) {
2937       // It would be nice to add java/lang/Boolean::TRUE here
2938       // to indicate that this backtrace has a hidden top frame.
2939       // But this code is used before TRUE is allocated.
2940       // Therefore let's just use an arbitrary legal oop
2941       // available right here. _methods is a short[].
2942       assert(_methods != nullptr, "we need a legal oop");
2943       _has_hidden_top_frame = true;
2944       _head->obj_at_put(trace_hidden_offset, _methods);
2945     }
2946   }
2947 };
2948 
2949 struct BacktraceElement : public StackObj {
2950   int _method_id;
2951   int _bci;
2952   int _version;
2953   Symbol* _name;
2954   Handle _mirror;
2955   BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2956                    _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2957 };
2958 
2959 class BacktraceIterator : public StackObj {
2960   int _index;
2961   objArrayHandle  _result;
2962   objArrayHandle  _mirrors;
2963   typeArrayHandle _methods;
2964   typeArrayHandle _bcis;
2965   typeArrayHandle _names;
2966 
2967   void init(objArrayHandle result, Thread* thread) {
2968     // Get method id, bci, version and mirror from chunk
2969     _result = result;
2970     if (_result.not_null()) {
2971       _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2972       _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2973       _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2974       _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2975       _index = 0;
2976     }
2977   }
2978  public:
2979   BacktraceIterator(objArrayHandle result, Thread* thread) {
2980     init(result, thread);
2981     assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2982   }
2983 
2984   BacktraceElement next(Thread* thread) {
2985     BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2986                         _methods->ushort_at(_index),
2987                         Backtrace::version_at(_bcis->int_at(_index)),
2988                         Backtrace::bci_at(_bcis->int_at(_index)),
2989                         _names->symbol_at(_index));
2990     _index++;
2991 
2992     if (_index >= java_lang_Throwable::trace_chunk_size) {
2993       int next_offset = java_lang_Throwable::trace_next_offset;
2994       // Get next chunk
2995       objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2996       init(result, thread);
2997     }
2998     return e;
2999   }
3000 
3001   bool repeat() {
3002     return _result.not_null() && _mirrors->obj_at(_index) != nullptr;
3003   }
3004 };
3005 
3006 
3007 // Print stack trace element to resource allocated buffer
3008 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
3009                                           int version, int bci, Symbol* name) {
3010   ResourceMark rm;
3011 
3012   // Get strings and string lengths
3013   InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
3014   const char* klass_name  = holder->external_name();
3015   int buf_len = (int)strlen(klass_name);
3016 
3017   char* method_name = name->as_C_string();
3018   buf_len += (int)strlen(method_name);
3019 
3020   char* source_file_name = nullptr;
3021   Symbol* source = Backtrace::get_source_file_name(holder, version);
3022   if (source != nullptr) {
3023     source_file_name = source->as_C_string();
3024     buf_len += (int)strlen(source_file_name);
3025   }
3026 
3027   char *module_name = nullptr, *module_version = nullptr;
3028   ModuleEntry* module = holder->module();
3029   if (module->is_named()) {
3030     module_name = module->name()->as_C_string();
3031     buf_len += (int)strlen(module_name);
3032     if (module->version() != nullptr) {
3033       module_version = module->version()->as_C_string();
3034       buf_len += (int)strlen(module_version);
3035     }
3036   }
3037 
3038   // Allocate temporary buffer with extra space for formatting and line number
3039   const size_t buf_size = buf_len + 64;
3040   char* buf = NEW_RESOURCE_ARRAY(char, buf_size);
3041 
3042   // Print stack trace line in buffer
3043   size_t buf_off = os::snprintf_checked(buf, buf_size, "\tat %s.%s(", klass_name, method_name);
3044 
3045   // Print module information
3046   if (module_name != nullptr) {
3047     if (module_version != nullptr) {
3048       buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s@%s/", module_name, module_version);
3049     } else {
3050       buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s/", module_name);
3051     }
3052   }
3053 
3054   // The method can be null if the requested class version is gone
3055   Method* method = holder->method_with_orig_idnum(method_id, version);
3056   if (!version_matches(method, version)) {
3057     strcat(buf, "Redefined)");
3058   } else {
3059     int line_number = Backtrace::get_line_number(method, bci);
3060     if (line_number == -2) {
3061       strcat(buf, "Native Method)");
3062     } else {
3063       if (source_file_name != nullptr && (line_number != -1)) {
3064         // Sourcename and linenumber
3065         buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s:%d)", source_file_name, line_number);
3066       } else if (source_file_name != nullptr) {
3067         // Just sourcename
3068         buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s)", source_file_name);
3069       } else {
3070         // Neither sourcename nor linenumber
3071         buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "Unknown Source)");
3072       }
3073       nmethod* nm = method->code();
3074       if (WizardMode && nm != nullptr) {
3075         os::snprintf_checked(buf + buf_off, buf_size - buf_off, "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
3076       }
3077     }
3078   }
3079 
3080   st->print_cr("%s", buf);
3081 }
3082 
3083 void java_lang_Throwable::print_stack_element(outputStream *st, Method* method, int bci) {
3084   Handle mirror (Thread::current(),  method->method_holder()->java_mirror());
3085   int method_id = method->orig_method_idnum();
3086   int version = method->constants()->version();
3087   print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
3088 }
3089 
3090 /**
3091  * Print the throwable message and its stack trace plus all causes by walking the
3092  * cause chain.  The output looks the same as of Throwable.printStackTrace().
3093  */
3094 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
3095   // First, print the message.
3096   print(throwable(), st);
3097   st->cr();
3098 
3099   // Now print the stack trace.
3100   JavaThread* THREAD = JavaThread::current(); // For exception macros.
3101   while (throwable.not_null()) {
3102     objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
3103     if (result.is_null()) {
3104       st->print_raw_cr("\t<<no stack trace available>>");
3105       return;
3106     }
3107     BacktraceIterator iter(result, THREAD);
3108 
3109     while (iter.repeat()) {
3110       BacktraceElement bte = iter.next(THREAD);
3111       print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
3112     }
3113     if (THREAD->can_call_java()) {
3114       // Call getCause() which doesn't necessarily return the _cause field.
3115       ExceptionMark em(THREAD);
3116       JavaValue cause(T_OBJECT);
3117       JavaCalls::call_virtual(&cause,
3118                               throwable,
3119                               throwable->klass(),
3120                               vmSymbols::getCause_name(),
3121                               vmSymbols::void_throwable_signature(),
3122                               THREAD);
3123       // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
3124       if (HAS_PENDING_EXCEPTION) {
3125         CLEAR_PENDING_EXCEPTION;
3126         throwable = Handle();
3127       } else {
3128         throwable = Handle(THREAD, cause.get_oop());
3129         if (throwable.not_null()) {
3130           st->print("Caused by: ");
3131           print(throwable(), st);
3132           st->cr();
3133         }
3134       }
3135     } else {
3136       st->print_raw_cr("<<cannot call Java to get cause>>");
3137       return;
3138     }
3139   }
3140 }
3141 
3142 /**
3143  * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
3144  */
3145 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
3146   assert(throwable->is_a(vmClasses::Throwable_klass()), "Throwable instance expected");
3147   JavaValue result(T_VOID);
3148   JavaCalls::call_virtual(&result,
3149                           throwable,
3150                           vmClasses::Throwable_klass(),
3151                           vmSymbols::printStackTrace_name(),
3152                           vmSymbols::void_method_signature(),
3153                           THREAD);
3154 }
3155 
3156 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
3157   if (!StackTraceInThrowable) return;
3158   ResourceMark rm(THREAD);
3159 
3160   // Start out by clearing the backtrace for this object, in case the VM
3161   // runs out of memory while allocating the stack trace
3162   set_backtrace(throwable(), nullptr);
3163   // Clear lazily constructed Java level stacktrace if refilling occurs
3164   // This is unnecessary in 1.7+ but harmless
3165   clear_stacktrace(throwable());
3166 
3167   int max_depth = MaxJavaStackTraceDepth;
3168   JavaThread* thread = THREAD;
3169 
3170   BacktraceBuilder bt(CHECK);
3171 
3172   // If there is no Java frame just return the method that was being called
3173   // with bci 0
3174   if (!thread->has_last_Java_frame()) {
3175     if (max_depth >= 1 && method() != nullptr) {
3176       bt.push(method(), 0, CHECK);
3177       log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
3178       set_depth(throwable(), 1);
3179       set_backtrace(throwable(), bt.backtrace());
3180     }
3181     return;
3182   }
3183 
3184   // Instead of using vframe directly, this version of fill_in_stack_trace
3185   // basically handles everything by hand. This significantly improved the
3186   // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
3187   // See bug 6333838 for  more details.
3188   // The "ASSERT" here is to verify this method generates the exactly same stack
3189   // trace as utilizing vframe.
3190 #ifdef ASSERT
3191   vframeStream st(thread, false /* stop_at_java_call_stub */, false /* process_frames */);
3192 #endif
3193   int total_count = 0;
3194   RegisterMap map(thread,
3195                   RegisterMap::UpdateMap::skip,
3196                   RegisterMap::ProcessFrames::skip,
3197                   RegisterMap::WalkContinuation::include);
3198   int decode_offset = 0;
3199   nmethod* nm = nullptr;
3200   bool skip_fillInStackTrace_check = false;
3201   bool skip_throwableInit_check = false;
3202   bool skip_hidden = !ShowHiddenFrames;
3203   bool show_carrier = ShowCarrierFrames;
3204   ContinuationEntry* cont_entry = thread->last_continuation();
3205   for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
3206     Method* method = nullptr;
3207     int bci = 0;
3208 
3209     // Compiled java method case.
3210     if (decode_offset != 0) {
3211       DebugInfoReadStream stream(nm, decode_offset);
3212       decode_offset = stream.read_int();
3213       method = (Method*)nm->metadata_at(stream.read_int());
3214       bci = stream.read_bci();
3215     } else {
3216       if (fr.is_first_frame()) break;
3217 
3218       if (Continuation::is_continuation_enterSpecial(fr)) {
3219         assert(cont_entry == Continuation::get_continuation_entry_for_entry_frame(thread, fr), "");
3220         if (!show_carrier && cont_entry->is_virtual_thread()) {
3221           break;
3222         }
3223         cont_entry = cont_entry->parent();
3224       }
3225 
3226       address pc = fr.pc();
3227       if (fr.is_interpreted_frame()) {
3228         address bcp;
3229         if (!map.in_cont()) {
3230           bcp = fr.interpreter_frame_bcp();
3231           method = fr.interpreter_frame_method();
3232         } else {
3233           bcp = map.stack_chunk()->interpreter_frame_bcp(fr);
3234           method = map.stack_chunk()->interpreter_frame_method(fr);
3235         }
3236         bci =  method->bci_from(bcp);
3237         fr = fr.sender(&map);
3238       } else {
3239         CodeBlob* cb = fr.cb();
3240         // HMMM QQQ might be nice to have frame return nm as null if cb is non-null
3241         // but non nmethod
3242         fr = fr.sender(&map);
3243         if (cb == nullptr || !cb->is_nmethod()) {
3244           continue;
3245         }
3246         nm = cb->as_nmethod();
3247         assert(nm->method() != nullptr, "must be");
3248         if (nm->method()->is_native()) {
3249           method = nm->method();
3250           bci = 0;
3251         } else {
3252           PcDesc* pd = nm->pc_desc_at(pc);
3253           decode_offset = pd->scope_decode_offset();
3254           // if decode_offset is not equal to 0, it will execute the
3255           // "compiled java method case" at the beginning of the loop.
3256           continue;
3257         }
3258       }
3259     }
3260 #ifdef ASSERT
3261     if (!st.at_end()) { // TODO LOOM remove once we show only vthread trace
3262       assert(st.method() == method && st.bci() == bci, "Wrong stack trace");
3263       st.next();
3264     }
3265 #endif
3266 
3267     // the format of the stacktrace will be:
3268     // - 1 or more fillInStackTrace frames for the exception class (skipped)
3269     // - 0 or more <init> methods for the exception class (skipped)
3270     // - rest of the stack
3271 
3272     if (!skip_fillInStackTrace_check) {
3273       if (method->name() == vmSymbols::fillInStackTrace_name() &&
3274           throwable->is_a(method->method_holder())) {
3275         continue;
3276       }
3277       else {
3278         skip_fillInStackTrace_check = true; // gone past them all
3279       }
3280     }
3281     if (!skip_throwableInit_check) {
3282       assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
3283 
3284       // skip <init> methods of the exception class and superclasses
3285       // This is similar to classic VM.
3286       if (method->name() == vmSymbols::object_initializer_name() &&
3287           throwable->is_a(method->method_holder())) {
3288         continue;
3289       } else {
3290         // there are none or we've seen them all - either way stop checking
3291         skip_throwableInit_check = true;
3292       }
3293     }
3294     if (method->is_hidden() || method->is_continuation_enter_intrinsic()) {
3295       if (skip_hidden) {
3296         if (total_count == 0) {
3297           // The top frame will be hidden from the stack trace.
3298           bt.set_has_hidden_top_frame();
3299         }
3300         continue;
3301       }
3302     }
3303 
3304     bt.push(method, bci, CHECK);
3305     total_count++;
3306   }
3307 
3308   log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
3309 
3310   // Put completed stack trace into throwable object
3311   set_backtrace(throwable(), bt.backtrace());
3312   set_depth(throwable(), total_count);
3313 }
3314 
3315 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
3316   // No-op if stack trace is disabled
3317   if (!StackTraceInThrowable) {
3318     return;
3319   }
3320 
3321   // Disable stack traces for some preallocated out of memory errors
3322   if (!Universe::should_fill_in_stack_trace(throwable)) {
3323     return;
3324   }
3325 
3326   JavaThread* THREAD = JavaThread::current(); // For exception macros.
3327   PreserveExceptionMark pm(THREAD);
3328 
3329   fill_in_stack_trace(throwable, method, THREAD);
3330   // Ignore exceptions thrown during stack trace filling (OOM) and reinstall the
3331   // original exception via the PreserveExceptionMark destructor.
3332   CLEAR_PENDING_EXCEPTION;
3333 }
3334 
3335 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
3336   // Allocate stack trace - backtrace is created but not filled in
3337 
3338   // No-op if stack trace is disabled
3339   if (!StackTraceInThrowable) return;
3340   BacktraceBuilder bt(CHECK);   // creates a backtrace
3341   set_backtrace(throwable(), bt.backtrace());
3342 }
3343 
3344 
3345 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
3346   // Fill in stack trace into preallocated backtrace (no GC)
3347 
3348   // No-op if stack trace is disabled
3349   if (!StackTraceInThrowable) return;
3350 
3351   assert(throwable->is_a(vmClasses::Throwable_klass()), "sanity check");
3352 
3353   JavaThread* THREAD = JavaThread::current(); // For exception macros.
3354 
3355   objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
3356   assert(backtrace.not_null(), "backtrace should have been preallocated");
3357 
3358   ResourceMark rm(THREAD);
3359   vframeStream st(THREAD, false /* stop_at_java_call_stub */, false /* process_frames */);
3360 
3361   BacktraceBuilder bt(THREAD, backtrace);
3362 
3363   // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
3364   // methods as preallocated errors aren't created by "java" code.
3365 
3366   // fill in as much stack trace as possible
3367   int chunk_count = 0;
3368   for (;!st.at_end(); st.next()) {
3369     bt.push(st.method(), st.bci(), CHECK);
3370     chunk_count++;
3371 
3372     // Bail-out for deep stacks
3373     if (chunk_count >= trace_chunk_size) break;
3374   }
3375   set_depth(throwable(), chunk_count);
3376   log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
3377 
3378   // We support the Throwable immutability protocol defined for Java 7.
3379   java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
3380   assert(java_lang_Throwable::unassigned_stacktrace() != nullptr, "not initialized");
3381 }
3382 
3383 void java_lang_Throwable::get_stack_trace_elements(int depth, Handle backtrace,
3384                                                    objArrayHandle stack_trace_array_h, TRAPS) {
3385 
3386   if (backtrace.is_null() || stack_trace_array_h.is_null()) {
3387     THROW(vmSymbols::java_lang_NullPointerException());
3388   }
3389 
3390   assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
3391 
3392   if (stack_trace_array_h->length() != depth) {
3393     THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
3394   }
3395 
3396   objArrayHandle result(THREAD, objArrayOop(backtrace()));
3397   BacktraceIterator iter(result, THREAD);
3398 
3399   int index = 0;
3400   while (iter.repeat()) {
3401     BacktraceElement bte = iter.next(THREAD);
3402 
3403     Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
3404 
3405     if (stack_trace_element.is_null()) {
3406       THROW(vmSymbols::java_lang_NullPointerException());
3407     }
3408 
3409     InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
3410     methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
3411 
3412     java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
3413                                          method,
3414                                          bte._version,
3415                                          bte._bci,
3416                                          bte._name,
3417                                          CHECK);
3418   }
3419 }
3420 
3421 Handle java_lang_Throwable::create_initialization_error(JavaThread* current, Handle throwable) {
3422   // Creates an ExceptionInInitializerError to be recorded as the initialization error when class initialization
3423   // failed due to the passed in 'throwable'. We cannot save 'throwable' directly due to issues with keeping alive
3424   // all objects referenced via its stacktrace. So instead we save a new EIIE instance, with the same message and
3425   // symbolic stacktrace of 'throwable'.
3426   assert(throwable.not_null(), "shouldn't be");
3427 
3428   // Now create the message from the original exception and thread name.
3429   ResourceMark rm(current);
3430   const char *message = nullptr;
3431   oop detailed_message = java_lang_Throwable::message(throwable());
3432   if (detailed_message != nullptr) {
3433     message = java_lang_String::as_utf8_string(detailed_message);
3434   }
3435   stringStream st;
3436   st.print("Exception %s%s ", throwable()->klass()->name()->as_klass_external_name(),
3437              message == nullptr ? "" : ":");
3438   if (message == nullptr) {
3439     st.print("[in thread \"%s\"]", current->name());
3440   } else {
3441     st.print("%s [in thread \"%s\"]", message, current->name());
3442   }
3443 
3444   Symbol* exception_name = vmSymbols::java_lang_ExceptionInInitializerError();
3445   Handle init_error = Exceptions::new_exception(current, exception_name, st.as_string());
3446   // If new_exception returns a different exception while creating the exception,
3447   // abandon the attempt to save the initialization error and return null.
3448   if (init_error->klass()->name() != exception_name) {
3449     log_info(class, init)("Exception %s thrown while saving initialization exception",
3450                         init_error->klass()->external_name());
3451     return Handle();
3452   }
3453 
3454   // Call to java to fill in the stack trace and clear declaringClassObject to
3455   // not keep classes alive in the stack trace.
3456   // call this:  public StackTraceElement[] getStackTrace()
3457   JavaValue result(T_ARRAY);
3458   JavaCalls::call_virtual(&result, throwable,
3459                           vmClasses::Throwable_klass(),
3460                           vmSymbols::getStackTrace_name(),
3461                           vmSymbols::getStackTrace_signature(),
3462                           current);
3463   if (!current->has_pending_exception()){
3464     Handle stack_trace(current, result.get_oop());
3465     assert(stack_trace->is_objArray(), "Should be an array");
3466     java_lang_Throwable::set_stacktrace(init_error(), stack_trace());
3467     // Clear backtrace because the stacktrace should be used instead.
3468     set_backtrace(init_error(), nullptr);
3469   } else {
3470     log_info(class, init)("Exception thrown while getting stack trace for initialization exception %s",
3471                         init_error->klass()->external_name());
3472     current->clear_pending_exception();
3473   }
3474 
3475   return init_error;
3476 }
3477 
3478 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) {
3479   JavaThread* current = JavaThread::current();
3480   objArrayHandle result(current, objArrayOop(backtrace(throwable)));
3481   BacktraceIterator iter(result, current);
3482   // No backtrace available.
3483   if (!iter.repeat()) return false;
3484 
3485   // If the exception happened in a frame that has been hidden, i.e.,
3486   // omitted from the back trace, we can not compute the message.
3487   oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset);
3488   if (hidden != nullptr) {
3489     return false;
3490   }
3491 
3492   // Get first backtrace element.
3493   BacktraceElement bte = iter.next(current);
3494 
3495   InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
3496   assert(holder != nullptr, "first element should be non-null");
3497   Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version);
3498 
3499   // Original version is no longer available.
3500   if (m == nullptr || !version_matches(m, bte._version)) {
3501     return false;
3502   }
3503 
3504   *method = m;
3505   *bci = bte._bci;
3506   return true;
3507 }
3508 
3509 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
3510   // Allocate java.lang.StackTraceElement instance
3511   InstanceKlass* k = vmClasses::StackTraceElement_klass();
3512   assert(k != nullptr, "must be loaded in 1.4+");
3513   if (k->should_be_initialized()) {
3514     k->initialize(CHECK_NULL);
3515   }
3516 
3517   Handle element = k->allocate_instance_handle(CHECK_NULL);
3518 
3519   int version = method->constants()->version();
3520   fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_NULL);
3521   return element();
3522 }
3523 
3524 void java_lang_StackTraceElement::fill_in(Handle element,
3525                                           InstanceKlass* holder, const methodHandle& method,
3526                                           int version, int bci, Symbol* name, TRAPS) {
3527   assert(element->is_a(vmClasses::StackTraceElement_klass()), "sanity check");
3528 
3529   ResourceMark rm(THREAD);
3530   HandleMark hm(THREAD);
3531 
3532   // Fill in class name
3533   Handle java_class(THREAD, holder->java_mirror());
3534   oop classname = java_lang_Class::name(java_class, CHECK);
3535   java_lang_StackTraceElement::set_declaringClass(element(), classname);
3536   java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
3537 
3538   oop loader = holder->class_loader();
3539   if (loader != nullptr) {
3540     oop loader_name = java_lang_ClassLoader::name(loader);
3541     if (loader_name != nullptr)
3542       java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
3543   }
3544 
3545   // Fill in method name
3546   oop methodname = StringTable::intern(name, CHECK);
3547   java_lang_StackTraceElement::set_methodName(element(), methodname);
3548 
3549   // Fill in module name and version
3550   ModuleEntry* module = holder->module();
3551   if (module->is_named()) {
3552     oop module_name = StringTable::intern(module->name(), CHECK);
3553     java_lang_StackTraceElement::set_moduleName(element(), module_name);
3554     oop module_version;
3555     if (module->version() != nullptr) {
3556       module_version = StringTable::intern(module->version(), CHECK);
3557     } else {
3558       module_version = nullptr;
3559     }
3560     java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
3561   }
3562 
3563   if (method() == nullptr || !version_matches(method(), version)) {
3564     // The method was redefined, accurate line number information isn't available
3565     java_lang_StackTraceElement::set_fileName(element(), nullptr);
3566     java_lang_StackTraceElement::set_lineNumber(element(), -1);
3567   } else {
3568     Symbol* source;
3569     oop source_file;
3570     int line_number;
3571     decode_file_and_line(java_class, holder, version, method, bci, source, source_file, line_number, CHECK);
3572 
3573     java_lang_StackTraceElement::set_fileName(element(), source_file);
3574     java_lang_StackTraceElement::set_lineNumber(element(), line_number);
3575   }
3576 }
3577 
3578 void java_lang_StackTraceElement::decode_file_and_line(Handle java_class,
3579                                                        InstanceKlass* holder,
3580                                                        int version,
3581                                                        const methodHandle& method,
3582                                                        int bci,
3583                                                        Symbol*& source,
3584                                                        oop& source_file,
3585                                                        int& line_number, TRAPS) {
3586   // Fill in source file name and line number.
3587   source = Backtrace::get_source_file_name(holder, version);
3588   source_file = java_lang_Class::source_file(java_class());
3589   if (source != nullptr) {
3590     // Class was not redefined. We can trust its cache if set,
3591     // else we have to initialize it.
3592     if (source_file == nullptr) {
3593       source_file = StringTable::intern(source, CHECK);
3594       java_lang_Class::set_source_file(java_class(), source_file);
3595     }
3596   } else {
3597     // Class was redefined. Dump the cache if it was set.
3598     if (source_file != nullptr) {
3599       source_file = nullptr;
3600       java_lang_Class::set_source_file(java_class(), source_file);
3601     }
3602   }
3603   line_number = Backtrace::get_line_number(method(), bci);
3604 }
3605 
3606 #if INCLUDE_JVMCI
3607 void java_lang_StackTraceElement::decode(const methodHandle& method, int bci,
3608                                          Symbol*& filename, int& line_number, TRAPS) {
3609   ResourceMark rm(THREAD);
3610   HandleMark hm(THREAD);
3611 
3612   filename = nullptr;
3613   line_number = -1;
3614 
3615   oop source_file;
3616   int version = method->constants()->version();
3617   InstanceKlass* holder = method->method_holder();
3618   Handle java_class(THREAD, holder->java_mirror());
3619   decode_file_and_line(java_class, holder, version, method, bci, filename, source_file, line_number, CHECK);
3620 }
3621 #endif // INCLUDE_JVMCI
3622 
3623 // java_lang_ClassFrameInfo
3624 
3625 int java_lang_ClassFrameInfo::_classOrMemberName_offset;
3626 int java_lang_ClassFrameInfo::_flags_offset;
3627 
3628 #define CLASSFRAMEINFO_FIELDS_DO(macro) \
3629   macro(_classOrMemberName_offset, k, "classOrMemberName", object_signature,  false); \
3630   macro(_flags_offset,             k, vmSymbols::flags_name(), int_signature, false)
3631 
3632 void java_lang_ClassFrameInfo::compute_offsets() {
3633   InstanceKlass* k = vmClasses::ClassFrameInfo_klass();
3634   CLASSFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3635 }
3636 
3637 #if INCLUDE_CDS
3638 void java_lang_ClassFrameInfo::serialize_offsets(SerializeClosure* f) {
3639   CLASSFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3640 }
3641 #endif
3642 
3643 static int get_flags(const methodHandle& m) {
3644   int flags = m->access_flags().as_method_flags();
3645   if (m->is_object_initializer()) {
3646     flags |= java_lang_invoke_MemberName::MN_IS_CONSTRUCTOR;
3647   } else {
3648     // Note: Static initializers can be here. Record them as plain methods.
3649     flags |= java_lang_invoke_MemberName::MN_IS_METHOD;
3650   }
3651   if (m->caller_sensitive()) {
3652     flags |= java_lang_invoke_MemberName::MN_CALLER_SENSITIVE;
3653   }
3654   if (m->is_hidden()) {
3655     flags |= java_lang_invoke_MemberName::MN_HIDDEN_MEMBER;
3656   }
3657   assert((flags & 0xFF000000) == 0, "unexpected flags");
3658   return flags;
3659 }
3660 
3661 oop java_lang_ClassFrameInfo::classOrMemberName(oop obj) {
3662   return obj->obj_field(_classOrMemberName_offset);
3663 }
3664 
3665 int java_lang_ClassFrameInfo::flags(oop obj) {
3666   return obj->int_field(_flags_offset);
3667 }
3668 
3669 void java_lang_ClassFrameInfo::init_class(Handle stackFrame, const methodHandle& m) {
3670   stackFrame->obj_field_put(_classOrMemberName_offset, m->method_holder()->java_mirror());
3671   // flags is initialized when ClassFrameInfo object is constructed and retain the value
3672   int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3673   stackFrame->int_field_put(_flags_offset, flags);
3674 }
3675 
3676 void java_lang_ClassFrameInfo::init_method(Handle stackFrame, const methodHandle& m, TRAPS) {
3677   oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(m, CHECK);
3678   stackFrame->obj_field_put(_classOrMemberName_offset, rmethod_name);
3679   // flags is initialized when ClassFrameInfo object is constructed and retain the value
3680   int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3681   stackFrame->int_field_put(_flags_offset, flags);
3682 }
3683 
3684 
3685 // java_lang_StackFrameInfo
3686 
3687 int java_lang_StackFrameInfo::_type_offset;
3688 int java_lang_StackFrameInfo::_name_offset;
3689 int java_lang_StackFrameInfo::_bci_offset;
3690 int java_lang_StackFrameInfo::_version_offset;
3691 int java_lang_StackFrameInfo::_contScope_offset;
3692 
3693 #define STACKFRAMEINFO_FIELDS_DO(macro) \
3694   macro(_type_offset,       k, "type",       object_signature,            false); \
3695   macro(_name_offset,       k, "name",       string_signature,            false); \
3696   macro(_bci_offset,        k, "bci",        int_signature,               false); \
3697   macro(_contScope_offset,  k, "contScope",  continuationscope_signature, false)
3698 
3699 void java_lang_StackFrameInfo::compute_offsets() {
3700   InstanceKlass* k = vmClasses::StackFrameInfo_klass();
3701   STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3702   STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3703 }
3704 
3705 #if INCLUDE_CDS
3706 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
3707   STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3708   STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3709 }
3710 #endif
3711 
3712 Method* java_lang_StackFrameInfo::get_method(oop obj) {
3713   oop m = java_lang_ClassFrameInfo::classOrMemberName(obj);
3714   Method* method = java_lang_invoke_ResolvedMethodName::vmtarget(m);
3715   return method;
3716 }
3717 
3718 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS) {
3719   // set Method* or mid/cpref
3720   HandleMark hm(THREAD);
3721   Handle cont_h(THREAD, cont);
3722   java_lang_ClassFrameInfo::init_method(stackFrame, method, CHECK);
3723 
3724   // set bci
3725   java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
3726   // method may be redefined; store the version
3727   int version = method->constants()->version();
3728   assert((jushort)version == version, "version should be short");
3729   java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
3730 
3731   oop contScope = cont_h() != nullptr ? jdk_internal_vm_Continuation::scope(cont_h()) : (oop)nullptr;
3732   java_lang_StackFrameInfo::set_contScope(stackFrame(), contScope);
3733 }
3734 
3735 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
3736   ResourceMark rm(THREAD);
3737   HandleMark hm(THREAD);
3738 
3739   Method* method = java_lang_StackFrameInfo::get_method(stackFrame());
3740   InstanceKlass* holder = method->method_holder();
3741   short version = stackFrame->short_field(_version_offset);
3742   int bci = stackFrame->int_field(_bci_offset);
3743   Symbol* name = method->name();
3744   java_lang_StackTraceElement::fill_in(stack_trace_element, holder, methodHandle(THREAD, method), version, bci, name, CHECK);
3745 }
3746 
3747 oop java_lang_StackFrameInfo::type(oop obj) {
3748   return obj->obj_field(_type_offset);
3749 }
3750 
3751 void java_lang_StackFrameInfo::set_type(oop obj, oop value) {
3752   obj->obj_field_put(_type_offset, value);
3753 }
3754 
3755 oop java_lang_StackFrameInfo::name(oop obj) {
3756   return obj->obj_field(_name_offset);
3757 }
3758 
3759 void java_lang_StackFrameInfo::set_name(oop obj, oop value) {
3760   obj->obj_field_put(_name_offset, value);
3761 }
3762 
3763 void java_lang_StackFrameInfo::set_version(oop obj, short value) {
3764   obj->short_field_put(_version_offset, value);
3765 }
3766 
3767 void java_lang_StackFrameInfo::set_bci(oop obj, int value) {
3768   assert(value >= 0 && value < max_jushort, "must be a valid bci value");
3769   obj->int_field_put(_bci_offset, value);
3770 }
3771 
3772 void java_lang_StackFrameInfo::set_contScope(oop obj, oop value) {
3773   obj->obj_field_put(_contScope_offset, value);
3774 }
3775 
3776 int java_lang_LiveStackFrameInfo::_monitors_offset;
3777 int java_lang_LiveStackFrameInfo::_locals_offset;
3778 int java_lang_LiveStackFrameInfo::_operands_offset;
3779 int java_lang_LiveStackFrameInfo::_mode_offset;
3780 
3781 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
3782   macro(_monitors_offset,   k, "monitors",    object_array_signature, false); \
3783   macro(_locals_offset,     k, "locals",      object_array_signature, false); \
3784   macro(_operands_offset,   k, "operands",    object_array_signature, false); \
3785   macro(_mode_offset,       k, "mode",        int_signature,          false)
3786 
3787 void java_lang_LiveStackFrameInfo::compute_offsets() {
3788   InstanceKlass* k = vmClasses::LiveStackFrameInfo_klass();
3789   LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3790 }
3791 
3792 #if INCLUDE_CDS
3793 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
3794   LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3795 }
3796 #endif
3797 
3798 void java_lang_LiveStackFrameInfo::set_monitors(oop obj, oop value) {
3799   obj->obj_field_put(_monitors_offset, value);
3800 }
3801 
3802 void java_lang_LiveStackFrameInfo::set_locals(oop obj, oop value) {
3803   obj->obj_field_put(_locals_offset, value);
3804 }
3805 
3806 void java_lang_LiveStackFrameInfo::set_operands(oop obj, oop value) {
3807   obj->obj_field_put(_operands_offset, value);
3808 }
3809 
3810 void java_lang_LiveStackFrameInfo::set_mode(oop obj, int value) {
3811   obj->int_field_put(_mode_offset, value);
3812 }
3813 
3814 // java_lang_AccessibleObject
3815 
3816 int java_lang_reflect_AccessibleObject::_override_offset;
3817 
3818 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
3819   macro(_override_offset, k, "override", bool_signature, false)
3820 
3821 void java_lang_reflect_AccessibleObject::compute_offsets() {
3822   InstanceKlass* k = vmClasses::reflect_AccessibleObject_klass();
3823   ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3824 }
3825 
3826 #if INCLUDE_CDS
3827 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
3828   ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3829 }
3830 #endif
3831 
3832 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
3833   return (jboolean) reflect->bool_field(_override_offset);
3834 }
3835 
3836 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
3837   reflect->bool_field_put(_override_offset, (int) value);
3838 }
3839 
3840 // java_lang_reflect_Method
3841 
3842 int java_lang_reflect_Method::_clazz_offset;
3843 int java_lang_reflect_Method::_name_offset;
3844 int java_lang_reflect_Method::_returnType_offset;
3845 int java_lang_reflect_Method::_parameterTypes_offset;
3846 int java_lang_reflect_Method::_exceptionTypes_offset;
3847 int java_lang_reflect_Method::_slot_offset;
3848 int java_lang_reflect_Method::_modifiers_offset;
3849 int java_lang_reflect_Method::_signature_offset;
3850 int java_lang_reflect_Method::_annotations_offset;
3851 int java_lang_reflect_Method::_parameter_annotations_offset;
3852 int java_lang_reflect_Method::_annotation_default_offset;
3853 
3854 #define METHOD_FIELDS_DO(macro) \
3855   macro(_clazz_offset,          k, vmSymbols::clazz_name(),          class_signature,       false); \
3856   macro(_name_offset,           k, vmSymbols::name_name(),           string_signature,      false); \
3857   macro(_returnType_offset,     k, vmSymbols::returnType_name(),     class_signature,       false); \
3858   macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3859   macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3860   macro(_slot_offset,           k, vmSymbols::slot_name(),           int_signature,         false); \
3861   macro(_modifiers_offset,      k, vmSymbols::modifiers_name(),      int_signature,         false); \
3862   macro(_signature_offset,             k, vmSymbols::signature_name(),             string_signature,     false); \
3863   macro(_annotations_offset,           k, vmSymbols::annotations_name(),           byte_array_signature, false); \
3864   macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
3865   macro(_annotation_default_offset,    k, vmSymbols::annotation_default_name(),    byte_array_signature, false);
3866 
3867 void java_lang_reflect_Method::compute_offsets() {
3868   InstanceKlass* k = vmClasses::reflect_Method_klass();
3869   METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3870 }
3871 
3872 #if INCLUDE_CDS
3873 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
3874   METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3875 }
3876 #endif
3877 
3878 Handle java_lang_reflect_Method::create(TRAPS) {
3879   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3880   Klass* klass = vmClasses::reflect_Method_klass();
3881   // This class is eagerly initialized during VM initialization, since we keep a reference
3882   // to one of the methods
3883   assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
3884   return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
3885 }
3886 
3887 oop java_lang_reflect_Method::clazz(oop reflect) {
3888   return reflect->obj_field(_clazz_offset);
3889 }
3890 
3891 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
3892    reflect->obj_field_put(_clazz_offset, value);
3893 }
3894 
3895 int java_lang_reflect_Method::slot(oop reflect) {
3896   return reflect->int_field(_slot_offset);
3897 }
3898 
3899 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
3900   reflect->int_field_put(_slot_offset, value);
3901 }
3902 
3903 void java_lang_reflect_Method::set_name(oop method, oop value) {
3904   method->obj_field_put(_name_offset, value);
3905 }
3906 
3907 oop java_lang_reflect_Method::return_type(oop method) {
3908   return method->obj_field(_returnType_offset);
3909 }
3910 
3911 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
3912   method->obj_field_put(_returnType_offset, value);
3913 }
3914 
3915 oop java_lang_reflect_Method::parameter_types(oop method) {
3916   return method->obj_field(_parameterTypes_offset);
3917 }
3918 
3919 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
3920   method->obj_field_put(_parameterTypes_offset, value);
3921 }
3922 
3923 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
3924   method->obj_field_put(_exceptionTypes_offset, value);
3925 }
3926 
3927 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
3928   method->int_field_put(_modifiers_offset, value);
3929 }
3930 
3931 void java_lang_reflect_Method::set_signature(oop method, oop value) {
3932   method->obj_field_put(_signature_offset, value);
3933 }
3934 
3935 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
3936   method->obj_field_put(_annotations_offset, value);
3937 }
3938 
3939 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
3940   method->obj_field_put(_parameter_annotations_offset, value);
3941 }
3942 
3943 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
3944   method->obj_field_put(_annotation_default_offset, value);
3945 }
3946 
3947 int java_lang_reflect_Constructor::_clazz_offset;
3948 int java_lang_reflect_Constructor::_parameterTypes_offset;
3949 int java_lang_reflect_Constructor::_exceptionTypes_offset;
3950 int java_lang_reflect_Constructor::_slot_offset;
3951 int java_lang_reflect_Constructor::_modifiers_offset;
3952 int java_lang_reflect_Constructor::_signature_offset;
3953 int java_lang_reflect_Constructor::_annotations_offset;
3954 int java_lang_reflect_Constructor::_parameter_annotations_offset;
3955 
3956 #define CONSTRUCTOR_FIELDS_DO(macro) \
3957   macro(_clazz_offset,          k, vmSymbols::clazz_name(),          class_signature,       false); \
3958   macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3959   macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3960   macro(_slot_offset,           k, vmSymbols::slot_name(),           int_signature,         false); \
3961   macro(_modifiers_offset,      k, vmSymbols::modifiers_name(),      int_signature,         false); \
3962   macro(_signature_offset,             k, vmSymbols::signature_name(),             string_signature,     false); \
3963   macro(_annotations_offset,           k, vmSymbols::annotations_name(),           byte_array_signature, false); \
3964   macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
3965 
3966 void java_lang_reflect_Constructor::compute_offsets() {
3967   InstanceKlass* k = vmClasses::reflect_Constructor_klass();
3968   CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3969 }
3970 
3971 #if INCLUDE_CDS
3972 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
3973   CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3974 }
3975 #endif
3976 
3977 Handle java_lang_reflect_Constructor::create(TRAPS) {
3978   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3979   Symbol* name = vmSymbols::java_lang_reflect_Constructor();
3980   Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3981   InstanceKlass* ik = InstanceKlass::cast(k);
3982   // Ensure it is initialized
3983   ik->initialize(CHECK_NH);
3984   return ik->allocate_instance_handle(THREAD);
3985 }
3986 
3987 oop java_lang_reflect_Constructor::clazz(oop reflect) {
3988   return reflect->obj_field(_clazz_offset);
3989 }
3990 
3991 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
3992    reflect->obj_field_put(_clazz_offset, value);
3993 }
3994 
3995 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
3996   return constructor->obj_field(_parameterTypes_offset);
3997 }
3998 
3999 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
4000   constructor->obj_field_put(_parameterTypes_offset, value);
4001 }
4002 
4003 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
4004   constructor->obj_field_put(_exceptionTypes_offset, value);
4005 }
4006 
4007 int java_lang_reflect_Constructor::slot(oop reflect) {
4008   return reflect->int_field(_slot_offset);
4009 }
4010 
4011 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
4012   reflect->int_field_put(_slot_offset, value);
4013 }
4014 
4015 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
4016   constructor->int_field_put(_modifiers_offset, value);
4017 }
4018 
4019 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
4020   constructor->obj_field_put(_signature_offset, value);
4021 }
4022 
4023 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
4024   constructor->obj_field_put(_annotations_offset, value);
4025 }
4026 
4027 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
4028   method->obj_field_put(_parameter_annotations_offset, value);
4029 }
4030 
4031 int java_lang_reflect_Field::_clazz_offset;
4032 int java_lang_reflect_Field::_name_offset;
4033 int java_lang_reflect_Field::_type_offset;
4034 int java_lang_reflect_Field::_slot_offset;
4035 int java_lang_reflect_Field::_modifiers_offset;
4036 int java_lang_reflect_Field::_trusted_final_offset;
4037 int java_lang_reflect_Field::_signature_offset;
4038 int java_lang_reflect_Field::_annotations_offset;
4039 
4040 #define FIELD_FIELDS_DO(macro) \
4041   macro(_clazz_offset,     k, vmSymbols::clazz_name(),     class_signature,  false); \
4042   macro(_name_offset,      k, vmSymbols::name_name(),      string_signature, false); \
4043   macro(_type_offset,      k, vmSymbols::type_name(),      class_signature,  false); \
4044   macro(_slot_offset,      k, vmSymbols::slot_name(),      int_signature,    false); \
4045   macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature,    false); \
4046   macro(_trusted_final_offset,    k, vmSymbols::trusted_final_name(),    bool_signature,       false); \
4047   macro(_signature_offset,        k, vmSymbols::signature_name(),        string_signature,     false); \
4048   macro(_annotations_offset,      k, vmSymbols::annotations_name(),      byte_array_signature, false);
4049 
4050 void java_lang_reflect_Field::compute_offsets() {
4051   InstanceKlass* k = vmClasses::reflect_Field_klass();
4052   FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4053 }
4054 
4055 #if INCLUDE_CDS
4056 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
4057   FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4058 }
4059 #endif
4060 
4061 Handle java_lang_reflect_Field::create(TRAPS) {
4062   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
4063   Symbol* name = vmSymbols::java_lang_reflect_Field();
4064   Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
4065   InstanceKlass* ik = InstanceKlass::cast(k);
4066   // Ensure it is initialized
4067   ik->initialize(CHECK_NH);
4068   return ik->allocate_instance_handle(THREAD);
4069 }
4070 
4071 oop java_lang_reflect_Field::clazz(oop reflect) {
4072   return reflect->obj_field(_clazz_offset);
4073 }
4074 
4075 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
4076   reflect->obj_field_put(_clazz_offset, value);
4077 }
4078 
4079 oop java_lang_reflect_Field::name(oop field) {
4080   return field->obj_field(_name_offset);
4081 }
4082 
4083 void java_lang_reflect_Field::set_name(oop field, oop value) {
4084   field->obj_field_put(_name_offset, value);
4085 }
4086 
4087 oop java_lang_reflect_Field::type(oop field) {
4088   return field->obj_field(_type_offset);
4089 }
4090 
4091 void java_lang_reflect_Field::set_type(oop field, oop value) {
4092   field->obj_field_put(_type_offset, value);
4093 }
4094 
4095 int java_lang_reflect_Field::slot(oop reflect) {
4096   return reflect->int_field(_slot_offset);
4097 }
4098 
4099 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
4100   reflect->int_field_put(_slot_offset, value);
4101 }
4102 
4103 int java_lang_reflect_Field::modifiers(oop field) {
4104   return field->int_field(_modifiers_offset);
4105 }
4106 
4107 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
4108   field->int_field_put(_modifiers_offset, value);
4109 }
4110 
4111 void java_lang_reflect_Field::set_trusted_final(oop field) {
4112   field->bool_field_put(_trusted_final_offset, true);
4113 }
4114 
4115 void java_lang_reflect_Field::set_signature(oop field, oop value) {
4116   field->obj_field_put(_signature_offset, value);
4117 }
4118 
4119 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
4120   field->obj_field_put(_annotations_offset, value);
4121 }
4122 
4123 oop java_lang_reflect_RecordComponent::create(InstanceKlass* holder, RecordComponent* component, TRAPS) {
4124   // Allocate java.lang.reflect.RecordComponent instance
4125   HandleMark hm(THREAD);
4126   InstanceKlass* ik = vmClasses::RecordComponent_klass();
4127   assert(ik != nullptr, "must be loaded");
4128   ik->initialize(CHECK_NULL);
4129 
4130   Handle element = ik->allocate_instance_handle(CHECK_NULL);
4131 
4132   Handle decl_class(THREAD, holder->java_mirror());
4133   java_lang_reflect_RecordComponent::set_clazz(element(), decl_class());
4134 
4135   Symbol* name = holder->constants()->symbol_at(component->name_index()); // name_index is a utf8
4136   oop component_name = StringTable::intern(name, CHECK_NULL);
4137   java_lang_reflect_RecordComponent::set_name(element(), component_name);
4138 
4139   Symbol* type = holder->constants()->symbol_at(component->descriptor_index());
4140   Handle component_type_h =
4141     SystemDictionary::find_java_mirror_for_type(type, holder, SignatureStream::NCDFError, CHECK_NULL);
4142   java_lang_reflect_RecordComponent::set_type(element(), component_type_h());
4143 
4144   Method* accessor_method = nullptr;
4145   {
4146     // Prepend "()" to type to create the full method signature.
4147     ResourceMark rm(THREAD);
4148     int sig_len = type->utf8_length() + 3; // "()" and null char
4149     char* sig = NEW_RESOURCE_ARRAY(char, sig_len);
4150     jio_snprintf(sig, sig_len, "%c%c%s", JVM_SIGNATURE_FUNC, JVM_SIGNATURE_ENDFUNC, type->as_C_string());
4151     TempNewSymbol full_sig = SymbolTable::new_symbol(sig);
4152     accessor_method = holder->find_instance_method(name, full_sig, Klass::PrivateLookupMode::find);
4153   }
4154 
4155   if (accessor_method != nullptr) {
4156     methodHandle method(THREAD, accessor_method);
4157     oop m = Reflection::new_method(method, false, CHECK_NULL);
4158     java_lang_reflect_RecordComponent::set_accessor(element(), m);
4159   } else {
4160     java_lang_reflect_RecordComponent::set_accessor(element(), nullptr);
4161   }
4162 
4163   int sig_index = component->generic_signature_index();
4164   if (sig_index > 0) {
4165     Symbol* sig = holder->constants()->symbol_at(sig_index); // sig_index is a utf8
4166     oop component_sig = StringTable::intern(sig, CHECK_NULL);
4167     java_lang_reflect_RecordComponent::set_signature(element(), component_sig);
4168   } else {
4169     java_lang_reflect_RecordComponent::set_signature(element(), nullptr);
4170   }
4171 
4172   typeArrayOop annotation_oop = Annotations::make_java_array(component->annotations(), CHECK_NULL);
4173   java_lang_reflect_RecordComponent::set_annotations(element(), annotation_oop);
4174 
4175   typeArrayOop type_annotation_oop = Annotations::make_java_array(component->type_annotations(), CHECK_NULL);
4176   java_lang_reflect_RecordComponent::set_typeAnnotations(element(), type_annotation_oop);
4177 
4178   return element();
4179 }
4180 
4181 int reflect_ConstantPool::_oop_offset;
4182 
4183 #define CONSTANTPOOL_FIELDS_DO(macro) \
4184   macro(_oop_offset, k, "constantPoolOop", object_signature, false)
4185 
4186 void reflect_ConstantPool::compute_offsets() {
4187   InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
4188   // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
4189   CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4190 }
4191 
4192 #if INCLUDE_CDS
4193 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
4194   CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4195 }
4196 #endif
4197 
4198 int java_lang_reflect_Parameter::_name_offset;
4199 int java_lang_reflect_Parameter::_modifiers_offset;
4200 int java_lang_reflect_Parameter::_index_offset;
4201 int java_lang_reflect_Parameter::_executable_offset;
4202 
4203 #define PARAMETER_FIELDS_DO(macro) \
4204   macro(_name_offset,        k, vmSymbols::name_name(),        string_signature, false); \
4205   macro(_modifiers_offset,   k, vmSymbols::modifiers_name(),   int_signature,    false); \
4206   macro(_index_offset,       k, vmSymbols::index_name(),       int_signature,    false); \
4207   macro(_executable_offset,  k, vmSymbols::executable_name(),  executable_signature, false)
4208 
4209 void java_lang_reflect_Parameter::compute_offsets() {
4210   InstanceKlass* k = vmClasses::reflect_Parameter_klass();
4211   PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4212 }
4213 
4214 #if INCLUDE_CDS
4215 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
4216   PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4217 }
4218 #endif
4219 
4220 Handle java_lang_reflect_Parameter::create(TRAPS) {
4221   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
4222   Symbol* name = vmSymbols::java_lang_reflect_Parameter();
4223   Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
4224   InstanceKlass* ik = InstanceKlass::cast(k);
4225   // Ensure it is initialized
4226   ik->initialize(CHECK_NH);
4227   return ik->allocate_instance_handle(THREAD);
4228 }
4229 
4230 oop java_lang_reflect_Parameter::name(oop param) {
4231   return param->obj_field(_name_offset);
4232 }
4233 
4234 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
4235   param->obj_field_put(_name_offset, value);
4236 }
4237 
4238 int java_lang_reflect_Parameter::modifiers(oop param) {
4239   return param->int_field(_modifiers_offset);
4240 }
4241 
4242 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
4243   param->int_field_put(_modifiers_offset, value);
4244 }
4245 
4246 int java_lang_reflect_Parameter::index(oop param) {
4247   return param->int_field(_index_offset);
4248 }
4249 
4250 void java_lang_reflect_Parameter::set_index(oop param, int value) {
4251   param->int_field_put(_index_offset, value);
4252 }
4253 
4254 oop java_lang_reflect_Parameter::executable(oop param) {
4255   return param->obj_field(_executable_offset);
4256 }
4257 
4258 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
4259   param->obj_field_put(_executable_offset, value);
4260 }
4261 
4262 // java_lang_Module
4263 
4264 int java_lang_Module::_loader_offset;
4265 int java_lang_Module::_name_offset;
4266 int java_lang_Module::_module_entry_offset;
4267 
4268 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
4269   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
4270   return JavaCalls::construct_new_instance(vmClasses::Module_klass(),
4271                           vmSymbols::java_lang_module_init_signature(),
4272                           loader, module_name, CHECK_NH);
4273 }
4274 
4275 #define MODULE_FIELDS_DO(macro) \
4276   macro(_loader_offset,  k, vmSymbols::loader_name(),  classloader_signature, false); \
4277   macro(_name_offset,    k, vmSymbols::name_name(),    string_signature,      false)
4278 
4279 void java_lang_Module::compute_offsets() {
4280   InstanceKlass* k = vmClasses::Module_klass();
4281   MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4282   MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4283 }
4284 
4285 #if INCLUDE_CDS
4286 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
4287   MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4288   MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4289 }
4290 #endif
4291 
4292 oop java_lang_Module::loader(oop module) {
4293   return module->obj_field(_loader_offset);
4294 }
4295 
4296 void java_lang_Module::set_loader(oop module, oop value) {
4297   module->obj_field_put(_loader_offset, value);
4298 }
4299 
4300 oop java_lang_Module::name(oop module) {
4301   return module->obj_field(_name_offset);
4302 }
4303 
4304 void java_lang_Module::set_name(oop module, oop value) {
4305   module->obj_field_put(_name_offset, value);
4306 }
4307 
4308 ModuleEntry* java_lang_Module::module_entry_raw(oop module) {
4309   assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
4310   assert(module != nullptr, "module can't be null");
4311   assert(oopDesc::is_oop(module), "module must be oop");
4312 
4313   ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
4314   return module_entry;
4315 }
4316 
4317 ModuleEntry* java_lang_Module::module_entry(oop module) {
4318   ModuleEntry* module_entry = module_entry_raw(module);
4319   if (module_entry == nullptr) {
4320     // If the inject field containing the ModuleEntry* is null then return the
4321     // class loader's unnamed module.
4322     oop loader = java_lang_Module::loader(module);
4323     Handle h_loader = Handle(Thread::current(), loader);
4324     ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
4325     return loader_cld->unnamed_module();
4326   }
4327   return module_entry;
4328 }
4329 
4330 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
4331   assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
4332   assert(module != nullptr, "module can't be null");
4333   assert(oopDesc::is_oop(module), "module must be oop");
4334   module->address_field_put(_module_entry_offset, (address)module_entry);
4335 }
4336 
4337 Handle reflect_ConstantPool::create(TRAPS) {
4338   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
4339   InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
4340   // Ensure it is initialized
4341   k->initialize(CHECK_NH);
4342   return k->allocate_instance_handle(THREAD);
4343 }
4344 
4345 
4346 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
4347   oop mirror = value->pool_holder()->java_mirror();
4348   // Save the mirror to get back the constant pool.
4349   reflect->obj_field_put(_oop_offset, mirror);
4350 }
4351 
4352 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
4353 
4354   oop mirror = reflect->obj_field(_oop_offset);
4355   Klass* k = java_lang_Class::as_Klass(mirror);
4356   assert(k->is_instance_klass(), "Must be");
4357 
4358   // Get the constant pool back from the klass.  Since class redefinition
4359   // merges the new constant pool into the old, this is essentially the
4360   // same constant pool as the original.  If constant pool merging is
4361   // no longer done in the future, this will have to change to save
4362   // the original.
4363   return InstanceKlass::cast(k)->constants();
4364 }
4365 
4366 
4367 // Support for java_lang_ref_Reference
4368 
4369 bool java_lang_ref_Reference::_offsets_initialized;
4370 
4371 int java_lang_ref_Reference::_referent_offset;
4372 int java_lang_ref_Reference::_queue_offset;
4373 int java_lang_ref_Reference::_next_offset;
4374 int java_lang_ref_Reference::_discovered_offset;
4375 
4376 #define REFERENCE_FIELDS_DO(macro) \
4377   macro(_referent_offset,   k, "referent", object_signature, false); \
4378   macro(_queue_offset,      k, "queue", referencequeue_signature, false); \
4379   macro(_next_offset,       k, "next", reference_signature, false); \
4380   macro(_discovered_offset, k, "discovered", reference_signature, false);
4381 
4382 void java_lang_ref_Reference::compute_offsets() {
4383   if (_offsets_initialized) {
4384     return;
4385   }
4386   _offsets_initialized = true;
4387   InstanceKlass* k = vmClasses::Reference_klass();
4388   REFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4389 }
4390 
4391 #if INCLUDE_CDS
4392 void java_lang_ref_Reference::serialize_offsets(SerializeClosure* f) {
4393   f->do_bool(&_offsets_initialized);
4394   REFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4395 }
4396 #endif
4397 
4398 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
4399   assert(obj != nullptr, "sanity");
4400   if (offset != _referent_offset) {
4401     return false;
4402   }
4403 
4404   Klass* k = obj->klass();
4405   if (!k->is_instance_klass()) {
4406     return false;
4407   }
4408 
4409   InstanceKlass* ik = InstanceKlass::cast(obj->klass());
4410   bool is_reference = ik->reference_type() != REF_NONE;
4411   assert(!is_reference || ik->is_subclass_of(vmClasses::Reference_klass()), "sanity");
4412   return is_reference;
4413 }
4414 
4415 int java_lang_boxing_object::_value_offset;
4416 int java_lang_boxing_object::_long_value_offset;
4417 
4418 #define BOXING_FIELDS_DO(macro) \
4419   macro(_value_offset,      integerKlass, "value", int_signature, false); \
4420   macro(_long_value_offset, longKlass, "value", long_signature, false);
4421 
4422 void java_lang_boxing_object::compute_offsets() {
4423   InstanceKlass* integerKlass = vmClasses::Integer_klass();
4424   InstanceKlass* longKlass = vmClasses::Long_klass();
4425   BOXING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4426 }
4427 
4428 #if INCLUDE_CDS
4429 void java_lang_boxing_object::serialize_offsets(SerializeClosure* f) {
4430   BOXING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4431 }
4432 #endif
4433 
4434 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
4435   Klass* k = vmClasses::box_klass(type);
4436   if (k == nullptr)  return nullptr;
4437   InstanceKlass* ik = InstanceKlass::cast(k);
4438   if (!ik->is_initialized()) {
4439     ik->initialize(CHECK_NULL);
4440   }
4441   return ik->allocate_instance(THREAD);
4442 }
4443 
4444 
4445 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
4446   oop box = initialize_and_allocate(type, CHECK_NULL);
4447   if (box == nullptr)  return nullptr;
4448   switch (type) {
4449     case T_BOOLEAN:
4450       box->bool_field_put(_value_offset, value->z);
4451       break;
4452     case T_CHAR:
4453       box->char_field_put(_value_offset, value->c);
4454       break;
4455     case T_FLOAT:
4456       box->float_field_put(_value_offset, value->f);
4457       break;
4458     case T_DOUBLE:
4459       box->double_field_put(_long_value_offset, value->d);
4460       break;
4461     case T_BYTE:
4462       box->byte_field_put(_value_offset, value->b);
4463       break;
4464     case T_SHORT:
4465       box->short_field_put(_value_offset, value->s);
4466       break;
4467     case T_INT:
4468       box->int_field_put(_value_offset, value->i);
4469       break;
4470     case T_LONG:
4471       box->long_field_put(_long_value_offset, value->j);
4472       break;
4473     default:
4474       return nullptr;
4475   }
4476   return box;
4477 }
4478 
4479 
4480 BasicType java_lang_boxing_object::basic_type(oop box) {
4481   if (box == nullptr)  return T_ILLEGAL;
4482   BasicType type = vmClasses::box_klass_type(box->klass());
4483   if (type == T_OBJECT)         // 'unknown' value returned by SD::bkt
4484     return T_ILLEGAL;
4485   return type;
4486 }
4487 
4488 
4489 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
4490   BasicType type = vmClasses::box_klass_type(box->klass());
4491   switch (type) {
4492   case T_BOOLEAN:
4493     value->z = box->bool_field(_value_offset);
4494     break;
4495   case T_CHAR:
4496     value->c = box->char_field(_value_offset);
4497     break;
4498   case T_FLOAT:
4499     value->f = box->float_field(_value_offset);
4500     break;
4501   case T_DOUBLE:
4502     value->d = box->double_field(_long_value_offset);
4503     break;
4504   case T_BYTE:
4505     value->b = box->byte_field(_value_offset);
4506     break;
4507   case T_SHORT:
4508     value->s = box->short_field(_value_offset);
4509     break;
4510   case T_INT:
4511     value->i = box->int_field(_value_offset);
4512     break;
4513   case T_LONG:
4514     value->j = box->long_field(_long_value_offset);
4515     break;
4516   default:
4517     return T_ILLEGAL;
4518   } // end switch
4519   return type;
4520 }
4521 
4522 
4523 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
4524   BasicType type = vmClasses::box_klass_type(box->klass());
4525   switch (type) {
4526   case T_BOOLEAN:
4527     box->bool_field_put(_value_offset, value->z);
4528     break;
4529   case T_CHAR:
4530     box->char_field_put(_value_offset, value->c);
4531     break;
4532   case T_FLOAT:
4533     box->float_field_put(_value_offset, value->f);
4534     break;
4535   case T_DOUBLE:
4536     box->double_field_put(_long_value_offset, value->d);
4537     break;
4538   case T_BYTE:
4539     box->byte_field_put(_value_offset, value->b);
4540     break;
4541   case T_SHORT:
4542     box->short_field_put(_value_offset, value->s);
4543     break;
4544   case T_INT:
4545     box->int_field_put(_value_offset, value->i);
4546     break;
4547   case T_LONG:
4548     box->long_field_put(_long_value_offset, value->j);
4549     break;
4550   default:
4551     return T_ILLEGAL;
4552   } // end switch
4553   return type;
4554 }
4555 
4556 
4557 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
4558   switch (type) {
4559   case T_BOOLEAN:   st->print("%s", value->z ? "true" : "false");   break;
4560   case T_CHAR:      st->print("%d", value->c);                      break;
4561   case T_BYTE:      st->print("%d", value->b);                      break;
4562   case T_SHORT:     st->print("%d", value->s);                      break;
4563   case T_INT:       st->print("%d", value->i);                      break;
4564   case T_LONG:      st->print(JLONG_FORMAT, value->j);              break;
4565   case T_FLOAT:     st->print("%f", value->f);                      break;
4566   case T_DOUBLE:    st->print("%lf", value->d);                     break;
4567   default:          st->print("type %d?", type);                    break;
4568   }
4569 }
4570 
4571 
4572 // Support for java_lang_ref_SoftReference
4573 //
4574 
4575 int java_lang_ref_SoftReference::_timestamp_offset;
4576 int java_lang_ref_SoftReference::_static_clock_offset;
4577 
4578 #define SOFTREFERENCE_FIELDS_DO(macro) \
4579   macro(_timestamp_offset,    k, "timestamp", long_signature, false); \
4580   macro(_static_clock_offset, k, "clock",     long_signature, true)
4581 
4582 void java_lang_ref_SoftReference::compute_offsets() {
4583   InstanceKlass* k = vmClasses::SoftReference_klass();
4584   SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4585 }
4586 
4587 #if INCLUDE_CDS
4588 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
4589   SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4590 }
4591 #endif
4592 
4593 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
4594   return ref->long_field(_timestamp_offset);
4595 }
4596 
4597 jlong java_lang_ref_SoftReference::clock() {
4598   InstanceKlass* ik = vmClasses::SoftReference_klass();
4599   oop base = ik->static_field_base_raw();
4600   return base->long_field(_static_clock_offset);
4601 }
4602 
4603 void java_lang_ref_SoftReference::set_clock(jlong value) {
4604   InstanceKlass* ik = vmClasses::SoftReference_klass();
4605   oop base = ik->static_field_base_raw();
4606   base->long_field_put(_static_clock_offset, value);
4607 }
4608 
4609 // Support for java_lang_invoke_DirectMethodHandle
4610 
4611 int java_lang_invoke_DirectMethodHandle::_member_offset;
4612 
4613 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
4614   oop member_name = nullptr;
4615   assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
4616          "a DirectMethodHandle oop is expected");
4617   return dmh->obj_field(_member_offset);
4618 }
4619 
4620 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
4621   macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
4622 
4623 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
4624   InstanceKlass* k = vmClasses::DirectMethodHandle_klass();
4625   DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4626 }
4627 
4628 #if INCLUDE_CDS
4629 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
4630   DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4631 }
4632 #endif
4633 
4634 // Support for java_lang_invoke_MethodHandle
4635 
4636 int java_lang_invoke_MethodHandle::_type_offset;
4637 int java_lang_invoke_MethodHandle::_form_offset;
4638 
4639 int java_lang_invoke_MemberName::_clazz_offset;
4640 int java_lang_invoke_MemberName::_name_offset;
4641 int java_lang_invoke_MemberName::_type_offset;
4642 int java_lang_invoke_MemberName::_flags_offset;
4643 int java_lang_invoke_MemberName::_method_offset;
4644 int java_lang_invoke_MemberName::_vmindex_offset;
4645 
4646 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
4647 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
4648 
4649 int java_lang_invoke_LambdaForm::_vmentry_offset;
4650 
4651 #define METHODHANDLE_FIELDS_DO(macro) \
4652   macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
4653   macro(_form_offset, k, "form",                 java_lang_invoke_LambdaForm_signature, false)
4654 
4655 void java_lang_invoke_MethodHandle::compute_offsets() {
4656   InstanceKlass* k = vmClasses::MethodHandle_klass();
4657   METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4658 }
4659 
4660 #if INCLUDE_CDS
4661 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
4662   METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4663 }
4664 #endif
4665 
4666 #define MEMBERNAME_FIELDS_DO(macro) \
4667   macro(_clazz_offset,   k, vmSymbols::clazz_name(),   class_signature,  false); \
4668   macro(_name_offset,    k, vmSymbols::name_name(),    string_signature, false); \
4669   macro(_type_offset,    k, vmSymbols::type_name(),    object_signature, false); \
4670   macro(_flags_offset,   k, vmSymbols::flags_name(),   int_signature,    false); \
4671   macro(_method_offset,  k, vmSymbols::method_name(),  java_lang_invoke_ResolvedMethodName_signature, false)
4672 
4673 void java_lang_invoke_MemberName::compute_offsets() {
4674   InstanceKlass* k = vmClasses::MemberName_klass();
4675   MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4676   MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4677 }
4678 
4679 #if INCLUDE_CDS
4680 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
4681   MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4682   MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4683 }
4684 #endif
4685 
4686 #define RESOLVEDMETHOD_FIELDS_DO(macro) \
4687   macro(_vmholder_offset, k, "vmholder", class_signature, false)
4688 
4689 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
4690   InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4691   assert(k != nullptr, "jdk mismatch");
4692   RESOLVEDMETHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4693   RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4694 }
4695 
4696 #if INCLUDE_CDS
4697 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
4698   RESOLVEDMETHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4699   RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4700 }
4701 #endif
4702 
4703 #define LAMBDAFORM_FIELDS_DO(macro) \
4704   macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
4705 
4706 void java_lang_invoke_LambdaForm::compute_offsets() {
4707   InstanceKlass* k = vmClasses::LambdaForm_klass();
4708   assert (k != nullptr, "jdk mismatch");
4709   LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4710 }
4711 
4712 #if INCLUDE_CDS
4713 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
4714   LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4715 }
4716 #endif
4717 
4718 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
4719   return obj != nullptr && is_subclass(obj->klass());
4720 }
4721 
4722 int jdk_internal_foreign_abi_NativeEntryPoint::_method_type_offset;
4723 int jdk_internal_foreign_abi_NativeEntryPoint::_downcall_stub_address_offset;
4724 
4725 #define NEP_FIELDS_DO(macro) \
4726   macro(_method_type_offset,           k, "methodType",          java_lang_invoke_MethodType_signature, false); \
4727   macro(_downcall_stub_address_offset, k, "downcallStubAddress", long_signature, false);
4728 
4729 bool jdk_internal_foreign_abi_NativeEntryPoint::is_instance(oop obj) {
4730   return obj != nullptr && is_subclass(obj->klass());
4731 }
4732 
4733 void jdk_internal_foreign_abi_NativeEntryPoint::compute_offsets() {
4734   InstanceKlass* k = vmClasses::NativeEntryPoint_klass();
4735   NEP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4736 }
4737 
4738 #if INCLUDE_CDS
4739 void jdk_internal_foreign_abi_NativeEntryPoint::serialize_offsets(SerializeClosure* f) {
4740   NEP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4741 }
4742 #endif
4743 
4744 oop jdk_internal_foreign_abi_NativeEntryPoint::method_type(oop entry) {
4745   return entry->obj_field(_method_type_offset);
4746 }
4747 
4748 jlong jdk_internal_foreign_abi_NativeEntryPoint::downcall_stub_address(oop entry) {
4749   return entry->long_field(_downcall_stub_address_offset);
4750 }
4751 
4752 int jdk_internal_foreign_abi_ABIDescriptor::_inputStorage_offset;
4753 int jdk_internal_foreign_abi_ABIDescriptor::_outputStorage_offset;
4754 int jdk_internal_foreign_abi_ABIDescriptor::_volatileStorage_offset;
4755 int jdk_internal_foreign_abi_ABIDescriptor::_stackAlignment_offset;
4756 int jdk_internal_foreign_abi_ABIDescriptor::_shadowSpace_offset;
4757 int jdk_internal_foreign_abi_ABIDescriptor::_scratch1_offset;
4758 int jdk_internal_foreign_abi_ABIDescriptor::_scratch2_offset;
4759 
4760 #define ABIDescriptor_FIELDS_DO(macro) \
4761   macro(_inputStorage_offset,    k, "inputStorage",    jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4762   macro(_outputStorage_offset,   k, "outputStorage",   jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4763   macro(_volatileStorage_offset, k, "volatileStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4764   macro(_stackAlignment_offset,  k, "stackAlignment",  int_signature, false); \
4765   macro(_shadowSpace_offset,     k, "shadowSpace",     int_signature, false); \
4766   macro(_scratch1_offset,        k, "scratch1",        jdk_internal_foreign_abi_VMStorage_signature, false); \
4767   macro(_scratch2_offset,        k, "scratch2",        jdk_internal_foreign_abi_VMStorage_signature, false);
4768 
4769 bool jdk_internal_foreign_abi_ABIDescriptor::is_instance(oop obj) {
4770   return obj != nullptr && is_subclass(obj->klass());
4771 }
4772 
4773 void jdk_internal_foreign_abi_ABIDescriptor::compute_offsets() {
4774   InstanceKlass* k = vmClasses::ABIDescriptor_klass();
4775   ABIDescriptor_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4776 }
4777 
4778 #if INCLUDE_CDS
4779 void jdk_internal_foreign_abi_ABIDescriptor::serialize_offsets(SerializeClosure* f) {
4780   ABIDescriptor_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4781 }
4782 #endif
4783 
4784 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::inputStorage(oop entry) {
4785   return oop_cast<objArrayOop>(entry->obj_field(_inputStorage_offset));
4786 }
4787 
4788 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::outputStorage(oop entry) {
4789   return oop_cast<objArrayOop>(entry->obj_field(_outputStorage_offset));
4790 }
4791 
4792 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::volatileStorage(oop entry) {
4793   return oop_cast<objArrayOop>(entry->obj_field(_volatileStorage_offset));
4794 }
4795 
4796 jint jdk_internal_foreign_abi_ABIDescriptor::stackAlignment(oop entry) {
4797   return entry->int_field(_stackAlignment_offset);
4798 }
4799 
4800 jint jdk_internal_foreign_abi_ABIDescriptor::shadowSpace(oop entry) {
4801   return entry->int_field(_shadowSpace_offset);
4802 }
4803 
4804 oop jdk_internal_foreign_abi_ABIDescriptor::scratch1(oop entry) {
4805   return entry->obj_field(_scratch1_offset);
4806 }
4807 
4808 oop jdk_internal_foreign_abi_ABIDescriptor::scratch2(oop entry) {
4809   return entry->obj_field(_scratch2_offset);
4810 }
4811 
4812 int jdk_internal_foreign_abi_VMStorage::_type_offset;
4813 int jdk_internal_foreign_abi_VMStorage::_indexOrOffset_offset;
4814 int jdk_internal_foreign_abi_VMStorage::_segmentMaskOrSize_offset;
4815 int jdk_internal_foreign_abi_VMStorage::_debugName_offset;
4816 
4817 #define VMStorage_FIELDS_DO(macro) \
4818   macro(_type_offset,              k, "type",              byte_signature, false); \
4819   macro(_indexOrOffset_offset,     k, "indexOrOffset",     int_signature, false); \
4820   macro(_segmentMaskOrSize_offset, k, "segmentMaskOrSize", short_signature, false); \
4821   macro(_debugName_offset,         k, "debugName",         string_signature, false); \
4822 
4823 bool jdk_internal_foreign_abi_VMStorage::is_instance(oop obj) {
4824   return obj != nullptr && is_subclass(obj->klass());
4825 }
4826 
4827 void jdk_internal_foreign_abi_VMStorage::compute_offsets() {
4828   InstanceKlass* k = vmClasses::VMStorage_klass();
4829   VMStorage_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4830 }
4831 
4832 #if INCLUDE_CDS
4833 void jdk_internal_foreign_abi_VMStorage::serialize_offsets(SerializeClosure* f) {
4834   VMStorage_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4835 }
4836 #endif
4837 
4838 jbyte jdk_internal_foreign_abi_VMStorage::type(oop entry) {
4839   return entry->byte_field(_type_offset);
4840 }
4841 
4842 jint jdk_internal_foreign_abi_VMStorage::index_or_offset(oop entry) {
4843   return entry->int_field(_indexOrOffset_offset);
4844 }
4845 
4846 jshort jdk_internal_foreign_abi_VMStorage::segment_mask_or_size(oop entry) {
4847   return entry->short_field(_segmentMaskOrSize_offset);
4848 }
4849 
4850 oop jdk_internal_foreign_abi_VMStorage::debugName(oop entry) {
4851   return entry->obj_field(_debugName_offset);
4852 }
4853 
4854 int jdk_internal_foreign_abi_CallConv::_argRegs_offset;
4855 int jdk_internal_foreign_abi_CallConv::_retRegs_offset;
4856 
4857 #define CallConv_FIELDS_DO(macro) \
4858   macro(_argRegs_offset, k, "argRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4859   macro(_retRegs_offset, k, "retRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4860 
4861 bool jdk_internal_foreign_abi_CallConv::is_instance(oop obj) {
4862   return obj != nullptr && is_subclass(obj->klass());
4863 }
4864 
4865 void jdk_internal_foreign_abi_CallConv::compute_offsets() {
4866   InstanceKlass* k = vmClasses::CallConv_klass();
4867   CallConv_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4868 }
4869 
4870 #if INCLUDE_CDS
4871 void jdk_internal_foreign_abi_CallConv::serialize_offsets(SerializeClosure* f) {
4872   CallConv_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4873 }
4874 #endif
4875 
4876 objArrayOop jdk_internal_foreign_abi_CallConv::argRegs(oop entry) {
4877   return oop_cast<objArrayOop>(entry->obj_field(_argRegs_offset));
4878 }
4879 
4880 objArrayOop jdk_internal_foreign_abi_CallConv::retRegs(oop entry) {
4881   return oop_cast<objArrayOop>(entry->obj_field(_retRegs_offset));
4882 }
4883 
4884 oop java_lang_invoke_MethodHandle::type(oop mh) {
4885   return mh->obj_field(_type_offset);
4886 }
4887 
4888 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
4889   mh->obj_field_put(_type_offset, mtype);
4890 }
4891 
4892 oop java_lang_invoke_MethodHandle::form(oop mh) {
4893   assert(_form_offset != 0, "");
4894   return mh->obj_field(_form_offset);
4895 }
4896 
4897 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
4898   assert(_form_offset != 0, "");
4899   mh->obj_field_put(_form_offset, lform);
4900 }
4901 
4902 /// MemberName accessors
4903 
4904 oop java_lang_invoke_MemberName::clazz(oop mname) {
4905   assert(is_instance(mname), "wrong type");
4906   return mname->obj_field(_clazz_offset);
4907 }
4908 
4909 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
4910   assert(is_instance(mname), "wrong type");
4911   mname->obj_field_put(_clazz_offset, clazz);
4912 }
4913 
4914 oop java_lang_invoke_MemberName::name(oop mname) {
4915   assert(is_instance(mname), "wrong type");
4916   return mname->obj_field(_name_offset);
4917 }
4918 
4919 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
4920   assert(is_instance(mname), "wrong type");
4921   mname->obj_field_put(_name_offset, name);
4922 }
4923 
4924 oop java_lang_invoke_MemberName::type(oop mname) {
4925   assert(is_instance(mname), "wrong type");
4926   return mname->obj_field(_type_offset);
4927 }
4928 
4929 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
4930   assert(is_instance(mname), "wrong type");
4931   mname->obj_field_put(_type_offset, type);
4932 }
4933 
4934 int java_lang_invoke_MemberName::flags(oop mname) {
4935   assert(is_instance(mname), "wrong type");
4936   return mname->int_field(_flags_offset);
4937 }
4938 
4939 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
4940   assert(is_instance(mname), "wrong type");
4941   mname->int_field_put(_flags_offset, flags);
4942 }
4943 
4944 
4945 // Return vmtarget from ResolvedMethodName method field through indirection
4946 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
4947   assert(is_instance(mname), "wrong type");
4948   oop method = mname->obj_field(_method_offset);
4949   return method == nullptr ? nullptr : java_lang_invoke_ResolvedMethodName::vmtarget(method);
4950 }
4951 
4952 bool java_lang_invoke_MemberName::is_method(oop mname) {
4953   assert(is_instance(mname), "must be MemberName");
4954   return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
4955 }
4956 
4957 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
4958   assert(is_instance(mname), "wrong type");
4959   mname->obj_field_put(_method_offset, resolved_method);
4960 }
4961 
4962 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
4963   assert(is_instance(mname), "wrong type");
4964   return (intptr_t) mname->address_field(_vmindex_offset);
4965 }
4966 
4967 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
4968   assert(is_instance(mname), "wrong type");
4969   mname->address_field_put(_vmindex_offset, (address) index);
4970 }
4971 
4972 
4973 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
4974   assert(is_instance(resolved_method), "wrong type");
4975   Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
4976   assert(m->is_method(), "must be");
4977   return m;
4978 }
4979 
4980 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
4981 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
4982   assert(is_instance(resolved_method), "wrong type");
4983   resolved_method->address_field_put(_vmtarget_offset, (address)m);
4984 }
4985 
4986 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) {
4987   assert(is_instance(resolved_method), "wrong type");
4988   resolved_method->obj_field_put(_vmholder_offset, holder);
4989 }
4990 
4991 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
4992   const Method* method = m();
4993 
4994   // lookup ResolvedMethod oop in the table, or create a new one and intern it
4995   oop resolved_method = ResolvedMethodTable::find_method(method);
4996   if (resolved_method != nullptr) {
4997     return resolved_method;
4998   }
4999 
5000   InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
5001   if (!k->is_initialized()) {
5002     k->initialize(CHECK_NULL);
5003   }
5004 
5005   oop new_resolved_method = k->allocate_instance(CHECK_NULL);
5006 
5007   NoSafepointVerifier nsv;
5008 
5009   if (method->is_old()) {
5010     method = (method->is_deleted()) ? Universe::throw_no_such_method_error() :
5011                                       method->get_new_method();
5012   }
5013 
5014   InstanceKlass* holder = method->method_holder();
5015 
5016   set_vmtarget(new_resolved_method, const_cast<Method*>(method));
5017   // Add a reference to the loader (actually mirror because hidden classes may not have
5018   // distinct loaders) to ensure the metadata is kept alive.
5019   // This mirror may be different than the one in clazz field.
5020   set_vmholder(new_resolved_method, holder->java_mirror());
5021 
5022   // Set flag in class to indicate this InstanceKlass has entries in the table
5023   // to avoid walking table during redefinition if none of the redefined classes
5024   // have any membernames in the table.
5025   holder->set_has_resolved_methods();
5026 
5027   return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method));
5028 }
5029 
5030 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
5031   assert(is_instance(lform), "wrong type");
5032   return lform->obj_field(_vmentry_offset);
5033 }
5034 
5035 
5036 // Support for java_lang_invoke_MethodType
5037 
5038 int java_lang_invoke_MethodType::_rtype_offset;
5039 int java_lang_invoke_MethodType::_ptypes_offset;
5040 
5041 #define METHODTYPE_FIELDS_DO(macro) \
5042   macro(_rtype_offset,  k, "rtype",  class_signature,       false); \
5043   macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
5044 
5045 void java_lang_invoke_MethodType::compute_offsets() {
5046   InstanceKlass* k = vmClasses::MethodType_klass();
5047   METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5048 }
5049 
5050 #if INCLUDE_CDS
5051 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
5052   METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5053 }
5054 #endif
5055 
5056 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
5057   st->print("(");
5058   objArrayOop pts = ptypes(mt);
5059   if (pts != nullptr) {
5060     for (int i = 0, limit = pts->length(); i < limit; i++) {
5061       java_lang_Class::print_signature(pts->obj_at(i), st);
5062     }
5063   } else {
5064     st->print("null");
5065   }
5066   st->print(")");
5067   oop rt = rtype(mt);
5068   if (rt != nullptr) {
5069     java_lang_Class::print_signature(rt, st);
5070   } else {
5071     st->print("null");
5072   }
5073 }
5074 
5075 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) {
5076   ResourceMark rm;
5077   stringStream buffer(128);
5078   print_signature(mt, &buffer);
5079   const char* sigstr =       buffer.base();
5080   int         siglen = (int) buffer.size();
5081   Symbol *name;
5082   if (!intern_if_not_found) {
5083     name = SymbolTable::probe(sigstr, siglen);
5084   } else {
5085     name = SymbolTable::new_symbol(sigstr, siglen);
5086   }
5087   return name;
5088 }
5089 
5090 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
5091   if (mt1 == mt2)
5092     return true;
5093   if (rtype(mt1) != rtype(mt2))
5094     return false;
5095   if (ptype_count(mt1) != ptype_count(mt2))
5096     return false;
5097   for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
5098     if (ptype(mt1, i) != ptype(mt2, i))
5099       return false;
5100   }
5101   return true;
5102 }
5103 
5104 oop java_lang_invoke_MethodType::rtype(oop mt) {
5105   assert(is_instance(mt), "must be a MethodType");
5106   return mt->obj_field(_rtype_offset);
5107 }
5108 
5109 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
5110   assert(is_instance(mt), "must be a MethodType");
5111   return (objArrayOop) mt->obj_field(_ptypes_offset);
5112 }
5113 
5114 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
5115   return ptypes(mt)->obj_at(idx);
5116 }
5117 
5118 int java_lang_invoke_MethodType::ptype_count(oop mt) {
5119   return ptypes(mt)->length();
5120 }
5121 
5122 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
5123   objArrayOop pts = ptypes(mt);
5124   int count = pts->length();
5125   int slots = 0;
5126   for (int i = 0; i < count; i++) {
5127     BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
5128     slots += type2size[bt];
5129   }
5130   return slots;
5131 }
5132 
5133 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
5134   BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
5135   return type2size[bt];
5136 }
5137 
5138 
5139 // Support for java_lang_invoke_CallSite
5140 
5141 int java_lang_invoke_CallSite::_target_offset;
5142 int java_lang_invoke_CallSite::_vmdependencies_offset;
5143 int java_lang_invoke_CallSite::_last_cleanup_offset;
5144 
5145 #define CALLSITE_FIELDS_DO(macro) \
5146   macro(_target_offset,  k, "target", java_lang_invoke_MethodHandle_signature, false); \
5147 
5148 void java_lang_invoke_CallSite::compute_offsets() {
5149   InstanceKlass* k = vmClasses::CallSite_klass();
5150   CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5151   CALLSITE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
5152 }
5153 
5154 #if INCLUDE_CDS
5155 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
5156   CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5157   CALLSITE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
5158 }
5159 #endif
5160 
5161 DependencyContext java_lang_invoke_CallSite::vmdependencies(oop call_site) {
5162   assert(java_lang_invoke_CallSite::is_instance(call_site), "");
5163   nmethodBucket* volatile* vmdeps_addr = call_site->field_addr<nmethodBucket* volatile>(_vmdependencies_offset);
5164   volatile uint64_t* last_cleanup_addr = call_site->field_addr<volatile uint64_t>(_last_cleanup_offset);
5165   DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr);
5166   return dep_ctx;
5167 }
5168 
5169 // Support for java_lang_invoke_ConstantCallSite
5170 
5171 int java_lang_invoke_ConstantCallSite::_is_frozen_offset;
5172 
5173 #define CONSTANTCALLSITE_FIELDS_DO(macro) \
5174   macro(_is_frozen_offset, k, "isFrozen", bool_signature, false)
5175 
5176 void java_lang_invoke_ConstantCallSite::compute_offsets() {
5177   InstanceKlass* k = vmClasses::ConstantCallSite_klass();
5178   CONSTANTCALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5179 }
5180 
5181 #if INCLUDE_CDS
5182 void java_lang_invoke_ConstantCallSite::serialize_offsets(SerializeClosure* f) {
5183   CONSTANTCALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5184 }
5185 #endif
5186 
5187 // Support for java_lang_ClassLoader
5188 
5189 int  java_lang_ClassLoader::_loader_data_offset;
5190 int  java_lang_ClassLoader::_parallelCapable_offset;
5191 int  java_lang_ClassLoader::_name_offset;
5192 int  java_lang_ClassLoader::_nameAndId_offset;
5193 int  java_lang_ClassLoader::_unnamedModule_offset;
5194 int  java_lang_ClassLoader::_parent_offset;
5195 
5196 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
5197   assert(loader != nullptr, "loader must not be null");
5198   assert(oopDesc::is_oop(loader), "loader must be oop");
5199   return Atomic::load_acquire(loader->field_addr<ClassLoaderData*>(_loader_data_offset));
5200 }
5201 
5202 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
5203   assert(loader != nullptr, "loader must not be null");
5204   assert(oopDesc::is_oop(loader), "loader must be oop");
5205   return *loader->field_addr<ClassLoaderData*>(_loader_data_offset);
5206 }
5207 
5208 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
5209   assert(loader != nullptr, "loader must not be null");
5210   assert(oopDesc::is_oop(loader), "loader must be oop");
5211   Atomic::release_store(loader->field_addr<ClassLoaderData*>(_loader_data_offset), new_data);
5212 }
5213 
5214 #define CLASSLOADER_FIELDS_DO(macro) \
5215   macro(_parallelCapable_offset, k1, "parallelLockMap",      concurrenthashmap_signature, false); \
5216   macro(_name_offset,            k1, vmSymbols::name_name(), string_signature, false); \
5217   macro(_nameAndId_offset,       k1, "nameAndId",            string_signature, false); \
5218   macro(_unnamedModule_offset,   k1, "unnamedModule",        module_signature, false); \
5219   macro(_parent_offset,          k1, "parent",               classloader_signature, false)
5220 
5221 void java_lang_ClassLoader::compute_offsets() {
5222   InstanceKlass* k1 = vmClasses::ClassLoader_klass();
5223   CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5224 
5225   CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
5226 }
5227 
5228 #if INCLUDE_CDS
5229 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
5230   CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5231   CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
5232 }
5233 #endif
5234 
5235 oop java_lang_ClassLoader::parent(oop loader) {
5236   assert(is_instance(loader), "loader must be oop");
5237   return loader->obj_field(_parent_offset);
5238 }
5239 
5240 oop java_lang_ClassLoader::parent_no_keepalive(oop loader) {
5241   assert(is_instance(loader), "loader must be oop");
5242   return loader->obj_field_access<AS_NO_KEEPALIVE>(_parent_offset);
5243 }
5244 
5245 // Returns the name field of this class loader.  If the name field has not
5246 // been set, null will be returned.
5247 oop java_lang_ClassLoader::name(oop loader) {
5248   assert(is_instance(loader), "loader must be oop");
5249   return loader->obj_field(_name_offset);
5250 }
5251 
5252 // Returns the nameAndId field of this class loader. The format is
5253 // as follows:
5254 //   If the defining loader has a name explicitly set then '<loader-name>' @<id>
5255 //   If the defining loader has no name then <qualified-class-name> @<id>
5256 //   If built-in loader, then omit '@<id>' as there is only one instance.
5257 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
5258 oop java_lang_ClassLoader::nameAndId(oop loader) {
5259   assert(is_instance(loader), "loader must be oop");
5260   return loader->obj_field(_nameAndId_offset);
5261 }
5262 
5263 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
5264   assert(is_instance(loader), "loader must be oop");
5265   assert(cl == nullptr || is_instance(cl), "cl argument must be oop");
5266   oop acl = loader;
5267   DEBUG_ONLY(jint loop_count = 0);
5268   // This loop taken verbatim from ClassLoader.java:
5269   do {
5270     acl = parent(acl);
5271     if (cl == acl) {
5272       return true;
5273     }
5274     assert(++loop_count > 0, "loop_count overflow");
5275   } while (acl != nullptr);
5276   return false;
5277 }
5278 
5279 bool java_lang_ClassLoader::is_instance(oop obj) {
5280   return obj != nullptr && is_subclass(obj->klass());
5281 }
5282 
5283 
5284 // For class loader classes, parallelCapable defined
5285 // based on non-null field
5286 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
5287 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
5288   assert(_parallelCapable_offset != 0, "offsets should have been initialized");
5289   return (class_loader->obj_field(_parallelCapable_offset) != nullptr);
5290 }
5291 
5292 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
5293   oop cl = SystemDictionary::java_system_loader();
5294   while(cl != nullptr) {
5295     if (cl == loader) return true;
5296     cl = parent(cl);
5297   }
5298   return false;
5299 }
5300 
5301 oop java_lang_ClassLoader::unnamedModule(oop loader) {
5302   assert(is_instance(loader), "loader must be oop");
5303   return loader->obj_field(_unnamedModule_offset);
5304 }
5305 
5306 // Support for java_lang_System
5307 //
5308 
5309 int java_lang_System::_static_in_offset;
5310 int java_lang_System::_static_out_offset;
5311 int java_lang_System::_static_err_offset;
5312 
5313 #define SYSTEM_FIELDS_DO(macro) \
5314   macro(_static_in_offset,  k, "in",  input_stream_signature, true); \
5315   macro(_static_out_offset, k, "out", print_stream_signature, true); \
5316   macro(_static_err_offset, k, "err", print_stream_signature, true);
5317 
5318 void java_lang_System::compute_offsets() {
5319   InstanceKlass* k = vmClasses::System_klass();
5320   SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5321 }
5322 
5323 #if INCLUDE_CDS
5324 void java_lang_System::serialize_offsets(SerializeClosure* f) {
5325    SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5326 }
5327 #endif
5328 
5329 // Support for jdk_internal_misc_UnsafeConstants
5330 //
5331 class UnsafeConstantsFixup : public FieldClosure {
5332 private:
5333   int _address_size;
5334   int _page_size;
5335   bool _big_endian;
5336   bool _use_unaligned_access;
5337   int _data_cache_line_flush_size;
5338 public:
5339   UnsafeConstantsFixup() {
5340     // round up values for all static final fields
5341     _address_size = sizeof(void*);
5342     _page_size = AIX_ONLY(sysconf(_SC_PAGESIZE)) NOT_AIX((int)os::vm_page_size());
5343     _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true);
5344     _use_unaligned_access = UseUnalignedAccesses;
5345     _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size();
5346   }
5347 
5348   void do_field(fieldDescriptor* fd) {
5349     oop mirror = fd->field_holder()->java_mirror();
5350     assert(mirror != nullptr, "UnsafeConstants must have mirror already");
5351     assert(fd->field_holder() == vmClasses::UnsafeConstants_klass(), "Should be UnsafeConstants");
5352     assert(fd->is_final(), "fields of UnsafeConstants must be final");
5353     assert(fd->is_static(), "fields of UnsafeConstants must be static");
5354     if (fd->name() == vmSymbols::address_size_name()) {
5355       mirror->int_field_put(fd->offset(), _address_size);
5356     } else if (fd->name() == vmSymbols::page_size_name()) {
5357       mirror->int_field_put(fd->offset(), _page_size);
5358     } else if (fd->name() == vmSymbols::big_endian_name()) {
5359       mirror->bool_field_put(fd->offset(), _big_endian);
5360     } else if (fd->name() == vmSymbols::use_unaligned_access_name()) {
5361       mirror->bool_field_put(fd->offset(), _use_unaligned_access);
5362     } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) {
5363       mirror->int_field_put(fd->offset(), _data_cache_line_flush_size);
5364     } else {
5365       assert(false, "unexpected UnsafeConstants field");
5366     }
5367   }
5368 };
5369 
5370 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() {
5371   UnsafeConstantsFixup fixup;
5372   vmClasses::UnsafeConstants_klass()->do_local_static_fields(&fixup);
5373 }
5374 
5375 
5376 // java_lang_StackTraceElement
5377 
5378 int java_lang_StackTraceElement::_methodName_offset;
5379 int java_lang_StackTraceElement::_fileName_offset;
5380 int java_lang_StackTraceElement::_lineNumber_offset;
5381 int java_lang_StackTraceElement::_moduleName_offset;
5382 int java_lang_StackTraceElement::_moduleVersion_offset;
5383 int java_lang_StackTraceElement::_classLoaderName_offset;
5384 int java_lang_StackTraceElement::_declaringClass_offset;
5385 int java_lang_StackTraceElement::_declaringClassObject_offset;
5386 
5387 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
5388   macro(_declaringClassObject_offset,  k, "declaringClassObject", class_signature, false); \
5389   macro(_classLoaderName_offset, k, "classLoaderName", string_signature, false); \
5390   macro(_moduleName_offset,      k, "moduleName",      string_signature, false); \
5391   macro(_moduleVersion_offset,   k, "moduleVersion",   string_signature, false); \
5392   macro(_declaringClass_offset,  k, "declaringClass",  string_signature, false); \
5393   macro(_methodName_offset,      k, "methodName",      string_signature, false); \
5394   macro(_fileName_offset,        k, "fileName",        string_signature, false); \
5395   macro(_lineNumber_offset,      k, "lineNumber",      int_signature,    false)
5396 
5397 // Support for java_lang_StackTraceElement
5398 void java_lang_StackTraceElement::compute_offsets() {
5399   InstanceKlass* k = vmClasses::StackTraceElement_klass();
5400   STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5401 }
5402 
5403 #if INCLUDE_CDS
5404 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
5405   STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5406 }
5407 #endif
5408 
5409 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
5410   element->obj_field_put(_fileName_offset, value);
5411 }
5412 
5413 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
5414   element->obj_field_put(_declaringClass_offset, value);
5415 }
5416 
5417 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
5418   element->obj_field_put(_methodName_offset, value);
5419 }
5420 
5421 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
5422   element->int_field_put(_lineNumber_offset, value);
5423 }
5424 
5425 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
5426   element->obj_field_put(_moduleName_offset, value);
5427 }
5428 
5429 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
5430   element->obj_field_put(_moduleVersion_offset, value);
5431 }
5432 
5433 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
5434   element->obj_field_put(_classLoaderName_offset, value);
5435 }
5436 
5437 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
5438   element->obj_field_put(_declaringClassObject_offset, value);
5439 }
5440 
5441 
5442 // java_lang_AssertionStatusDirectives
5443 
5444 int java_lang_AssertionStatusDirectives::_classes_offset;
5445 int java_lang_AssertionStatusDirectives::_classEnabled_offset;
5446 int java_lang_AssertionStatusDirectives::_packages_offset;
5447 int java_lang_AssertionStatusDirectives::_packageEnabled_offset;
5448 int java_lang_AssertionStatusDirectives::_deflt_offset;
5449 
5450 // Support for java Assertions - java_lang_AssertionStatusDirectives.
5451 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
5452   macro(_classes_offset,        k, "classes",        string_array_signature, false); \
5453   macro(_classEnabled_offset,   k, "classEnabled",   bool_array_signature, false); \
5454   macro(_packages_offset,       k, "packages",       string_array_signature, false); \
5455   macro(_packageEnabled_offset, k, "packageEnabled", bool_array_signature,   false); \
5456   macro(_deflt_offset,          k, "deflt",          bool_signature,         false)
5457 
5458 void java_lang_AssertionStatusDirectives::compute_offsets() {
5459   InstanceKlass* k = vmClasses::AssertionStatusDirectives_klass();
5460   ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5461 }
5462 
5463 #if INCLUDE_CDS
5464 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
5465   ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5466 }
5467 #endif
5468 
5469 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
5470   o->obj_field_put(_classes_offset, val);
5471 }
5472 
5473 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
5474   o->obj_field_put(_classEnabled_offset, val);
5475 }
5476 
5477 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
5478   o->obj_field_put(_packages_offset, val);
5479 }
5480 
5481 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
5482   o->obj_field_put(_packageEnabled_offset, val);
5483 }
5484 
5485 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
5486   o->bool_field_put(_deflt_offset, val);
5487 }
5488 
5489 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
5490 
5491 #define AOS_FIELDS_DO(macro) \
5492   macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
5493 
5494 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
5495   InstanceKlass* k = vmClasses::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
5496   AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5497 }
5498 
5499 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
5500   assert(_owner_offset != 0, "Must be initialized");
5501   return obj->obj_field_acquire(_owner_offset);
5502 }
5503 
5504 #if INCLUDE_CDS
5505 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
5506   AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5507 }
5508 #endif
5509 
5510 int vector_VectorPayload::_payload_offset;
5511 
5512 #define VECTORPAYLOAD_FIELDS_DO(macro) \
5513   macro(_payload_offset, k, "payload", object_signature, false)
5514 
5515 void vector_VectorPayload::compute_offsets() {
5516   InstanceKlass* k = vmClasses::vector_VectorPayload_klass();
5517   VECTORPAYLOAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5518 }
5519 
5520 #if INCLUDE_CDS
5521 void vector_VectorPayload::serialize_offsets(SerializeClosure* f) {
5522   VECTORPAYLOAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5523 }
5524 #endif
5525 
5526 void vector_VectorPayload::set_payload(oop o, oop val) {
5527   o->obj_field_put(_payload_offset, val);
5528 }
5529 
5530 bool vector_VectorPayload::is_instance(oop obj) {
5531   return obj != nullptr && is_subclass(obj->klass());
5532 }
5533 
5534 int java_lang_Integer_IntegerCache::_static_cache_offset;
5535 int java_lang_Long_LongCache::_static_cache_offset;
5536 int java_lang_Character_CharacterCache::_static_cache_offset;
5537 int java_lang_Short_ShortCache::_static_cache_offset;
5538 int java_lang_Byte_ByteCache::_static_cache_offset;
5539 
5540 #define INTEGER_CACHE_FIELDS_DO(macro) \
5541   macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true)
5542 
5543 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) {
5544   guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5545   INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5546 }
5547 
5548 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) {
5549   oop base = ik->static_field_base_raw();
5550   return objArrayOop(base->obj_field(_static_cache_offset));
5551 }
5552 
5553 Symbol* java_lang_Integer_IntegerCache::symbol() {
5554   return vmSymbols::java_lang_Integer_IntegerCache();
5555 }
5556 
5557 #if INCLUDE_CDS
5558 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) {
5559   INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5560 }
5561 #endif
5562 #undef INTEGER_CACHE_FIELDS_DO
5563 
5564 jint java_lang_Integer::value(oop obj) {
5565    jvalue v;
5566    java_lang_boxing_object::get_value(obj, &v);
5567    return v.i;
5568 }
5569 
5570 #define LONG_CACHE_FIELDS_DO(macro) \
5571   macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true)
5572 
5573 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) {
5574   guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5575   LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5576 }
5577 
5578 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) {
5579   oop base = ik->static_field_base_raw();
5580   return objArrayOop(base->obj_field(_static_cache_offset));
5581 }
5582 
5583 Symbol* java_lang_Long_LongCache::symbol() {
5584   return vmSymbols::java_lang_Long_LongCache();
5585 }
5586 
5587 #if INCLUDE_CDS
5588 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) {
5589   LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5590 }
5591 #endif
5592 #undef LONG_CACHE_FIELDS_DO
5593 
5594 jlong java_lang_Long::value(oop obj) {
5595    jvalue v;
5596    java_lang_boxing_object::get_value(obj, &v);
5597    return v.j;
5598 }
5599 
5600 #define CHARACTER_CACHE_FIELDS_DO(macro) \
5601   macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true)
5602 
5603 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) {
5604   guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5605   CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5606 }
5607 
5608 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) {
5609   oop base = ik->static_field_base_raw();
5610   return objArrayOop(base->obj_field(_static_cache_offset));
5611 }
5612 
5613 Symbol* java_lang_Character_CharacterCache::symbol() {
5614   return vmSymbols::java_lang_Character_CharacterCache();
5615 }
5616 
5617 #if INCLUDE_CDS
5618 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) {
5619   CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5620 }
5621 #endif
5622 #undef CHARACTER_CACHE_FIELDS_DO
5623 
5624 jchar java_lang_Character::value(oop obj) {
5625    jvalue v;
5626    java_lang_boxing_object::get_value(obj, &v);
5627    return v.c;
5628 }
5629 
5630 #define SHORT_CACHE_FIELDS_DO(macro) \
5631   macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true)
5632 
5633 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) {
5634   guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5635   SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5636 }
5637 
5638 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) {
5639   oop base = ik->static_field_base_raw();
5640   return objArrayOop(base->obj_field(_static_cache_offset));
5641 }
5642 
5643 Symbol* java_lang_Short_ShortCache::symbol() {
5644   return vmSymbols::java_lang_Short_ShortCache();
5645 }
5646 
5647 #if INCLUDE_CDS
5648 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) {
5649   SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5650 }
5651 #endif
5652 #undef SHORT_CACHE_FIELDS_DO
5653 
5654 jshort java_lang_Short::value(oop obj) {
5655    jvalue v;
5656    java_lang_boxing_object::get_value(obj, &v);
5657    return v.s;
5658 }
5659 
5660 #define BYTE_CACHE_FIELDS_DO(macro) \
5661   macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true)
5662 
5663 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) {
5664   guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5665   BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5666 }
5667 
5668 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) {
5669   oop base = ik->static_field_base_raw();
5670   return objArrayOop(base->obj_field(_static_cache_offset));
5671 }
5672 
5673 Symbol* java_lang_Byte_ByteCache::symbol() {
5674   return vmSymbols::java_lang_Byte_ByteCache();
5675 }
5676 
5677 #if INCLUDE_CDS
5678 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) {
5679   BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5680 }
5681 #endif
5682 #undef BYTE_CACHE_FIELDS_DO
5683 
5684 jbyte java_lang_Byte::value(oop obj) {
5685    jvalue v;
5686    java_lang_boxing_object::get_value(obj, &v);
5687    return v.b;
5688 }
5689 
5690 int java_lang_Boolean::_static_TRUE_offset;
5691 int java_lang_Boolean::_static_FALSE_offset;
5692 
5693 #define BOOLEAN_FIELDS_DO(macro) \
5694   macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \
5695   macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true)
5696 
5697 
5698 void java_lang_Boolean::compute_offsets(InstanceKlass *k) {
5699   guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5700   BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5701 }
5702 
5703 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) {
5704   oop base = ik->static_field_base_raw();
5705   return base->obj_field(_static_TRUE_offset);
5706 }
5707 
5708 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) {
5709   oop base = ik->static_field_base_raw();
5710   return base->obj_field(_static_FALSE_offset);
5711 }
5712 
5713 Symbol* java_lang_Boolean::symbol() {
5714   return vmSymbols::java_lang_Boolean();
5715 }
5716 
5717 #if INCLUDE_CDS
5718 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) {
5719   BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5720 }
5721 #endif
5722 #undef BOOLEAN_CACHE_FIELDS_DO
5723 
5724 jboolean java_lang_Boolean::value(oop obj) {
5725    jvalue v;
5726    java_lang_boxing_object::get_value(obj, &v);
5727    return v.z;
5728 }
5729 
5730 // java_lang_reflect_RecordComponent
5731 
5732 int java_lang_reflect_RecordComponent::_clazz_offset;
5733 int java_lang_reflect_RecordComponent::_name_offset;
5734 int java_lang_reflect_RecordComponent::_type_offset;
5735 int java_lang_reflect_RecordComponent::_accessor_offset;
5736 int java_lang_reflect_RecordComponent::_signature_offset;
5737 int java_lang_reflect_RecordComponent::_annotations_offset;
5738 int java_lang_reflect_RecordComponent::_typeAnnotations_offset;
5739 
5740 #define RECORDCOMPONENT_FIELDS_DO(macro) \
5741   macro(_clazz_offset,       k, "clazz",       class_signature,  false); \
5742   macro(_name_offset,        k, "name",        string_signature, false); \
5743   macro(_type_offset,        k, "type",        class_signature,  false); \
5744   macro(_accessor_offset,    k, "accessor",    reflect_method_signature, false); \
5745   macro(_signature_offset,   k, "signature",   string_signature, false); \
5746   macro(_annotations_offset, k, "annotations", byte_array_signature,     false); \
5747   macro(_typeAnnotations_offset, k, "typeAnnotations", byte_array_signature, false);
5748 
5749 // Support for java_lang_reflect_RecordComponent
5750 void java_lang_reflect_RecordComponent::compute_offsets() {
5751   InstanceKlass* k = vmClasses::RecordComponent_klass();
5752   RECORDCOMPONENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5753 }
5754 
5755 #if INCLUDE_CDS
5756 void java_lang_reflect_RecordComponent::serialize_offsets(SerializeClosure* f) {
5757   RECORDCOMPONENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5758 }
5759 #endif
5760 
5761 void java_lang_reflect_RecordComponent::set_clazz(oop element, oop value) {
5762   element->obj_field_put(_clazz_offset, value);
5763 }
5764 
5765 void java_lang_reflect_RecordComponent::set_name(oop element, oop value) {
5766   element->obj_field_put(_name_offset, value);
5767 }
5768 
5769 void java_lang_reflect_RecordComponent::set_type(oop element, oop value) {
5770   element->obj_field_put(_type_offset, value);
5771 }
5772 
5773 void java_lang_reflect_RecordComponent::set_accessor(oop element, oop value) {
5774   element->obj_field_put(_accessor_offset, value);
5775 }
5776 
5777 void java_lang_reflect_RecordComponent::set_signature(oop element, oop value) {
5778   element->obj_field_put(_signature_offset, value);
5779 }
5780 
5781 void java_lang_reflect_RecordComponent::set_annotations(oop element, oop value) {
5782   element->obj_field_put(_annotations_offset, value);
5783 }
5784 
5785 void java_lang_reflect_RecordComponent::set_typeAnnotations(oop element, oop value) {
5786   element->obj_field_put(_typeAnnotations_offset, value);
5787 }
5788 
5789 // java_lang_InternalError
5790 int java_lang_InternalError::_during_unsafe_access_offset;
5791 
5792 void java_lang_InternalError::set_during_unsafe_access(oop internal_error) {
5793   internal_error->bool_field_put(_during_unsafe_access_offset, true);
5794 }
5795 
5796 jboolean java_lang_InternalError::during_unsafe_access(oop internal_error) {
5797   return internal_error->bool_field(_during_unsafe_access_offset);
5798 }
5799 
5800 void java_lang_InternalError::compute_offsets() {
5801   INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
5802 }
5803 
5804 #if INCLUDE_CDS
5805 void java_lang_InternalError::serialize_offsets(SerializeClosure* f) {
5806   INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
5807 }
5808 #endif
5809 
5810 #define BASIC_JAVA_CLASSES_DO_PART1(f) \
5811   f(java_lang_Class) \
5812   f(java_lang_String) \
5813   f(java_lang_ref_Reference) \
5814   //end
5815 
5816 #define BASIC_JAVA_CLASSES_DO_PART2(f) \
5817   f(java_lang_System) \
5818   f(java_lang_ClassLoader) \
5819   f(java_lang_Throwable) \
5820   f(java_lang_Thread) \
5821   f(java_lang_Thread_FieldHolder) \
5822   f(java_lang_Thread_Constants) \
5823   f(java_lang_ThreadGroup) \
5824   f(java_lang_VirtualThread) \
5825   f(java_lang_InternalError) \
5826   f(java_lang_AssertionStatusDirectives) \
5827   f(java_lang_ref_SoftReference) \
5828   f(java_lang_invoke_MethodHandle) \
5829   f(java_lang_invoke_DirectMethodHandle) \
5830   f(java_lang_invoke_MemberName) \
5831   f(java_lang_invoke_ResolvedMethodName) \
5832   f(java_lang_invoke_LambdaForm) \
5833   f(java_lang_invoke_MethodType) \
5834   f(java_lang_invoke_CallSite) \
5835   f(java_lang_invoke_ConstantCallSite) \
5836   f(java_lang_reflect_AccessibleObject) \
5837   f(java_lang_reflect_Method) \
5838   f(java_lang_reflect_Constructor) \
5839   f(java_lang_reflect_Field) \
5840   f(java_lang_reflect_RecordComponent) \
5841   f(reflect_ConstantPool) \
5842   f(java_lang_reflect_Parameter) \
5843   f(java_lang_Module) \
5844   f(java_lang_StackTraceElement) \
5845   f(java_lang_ClassFrameInfo) \
5846   f(java_lang_StackFrameInfo) \
5847   f(java_lang_LiveStackFrameInfo) \
5848   f(jdk_internal_vm_ContinuationScope) \
5849   f(jdk_internal_vm_Continuation) \
5850   f(jdk_internal_vm_StackChunk) \
5851   f(java_util_concurrent_locks_AbstractOwnableSynchronizer) \
5852   f(jdk_internal_foreign_abi_NativeEntryPoint) \
5853   f(jdk_internal_foreign_abi_ABIDescriptor) \
5854   f(jdk_internal_foreign_abi_VMStorage) \
5855   f(jdk_internal_foreign_abi_CallConv) \
5856   f(jdk_internal_misc_UnsafeConstants) \
5857   f(java_lang_boxing_object) \
5858   f(vector_VectorPayload) \
5859   //end
5860 
5861 #define BASIC_JAVA_CLASSES_DO(f) \
5862         BASIC_JAVA_CLASSES_DO_PART1(f) \
5863         BASIC_JAVA_CLASSES_DO_PART2(f)
5864 
5865 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
5866 
5867 // Compute field offsets of all the classes in this file
5868 void JavaClasses::compute_offsets() {
5869   if (CDSConfig::is_using_archive()) {
5870     JVMTI_ONLY(assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
5871                                                          JvmtiExport::has_early_class_hook_env()),
5872                       "JavaClasses::compute_offsets() must be called in early JVMTI phase."));
5873     // None of the classes used by the rest of this function can be replaced by
5874     // JVMTI ClassFileLoadHook.
5875     // We are safe to use the archived offsets, which have already been restored
5876     // by JavaClasses::serialize_offsets, without computing the offsets again.
5877     return;
5878   }
5879 
5880   // We have already called the compute_offsets() of the
5881   // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String, java_lang_Class and
5882   // java_lang_ref_Reference) earlier inside vmClasses::resolve_all()
5883   BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
5884 }
5885 
5886 #if INCLUDE_CDS
5887 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
5888 
5889 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
5890   BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
5891 }
5892 #endif
5893 
5894 #if INCLUDE_CDS_JAVA_HEAP
5895 bool JavaClasses::is_supported_for_archiving(oop obj) {
5896   Klass* klass = obj->klass();
5897 
5898   if (!CDSConfig::is_dumping_method_handles()) {
5899     // These are supported by CDS only when CDSConfig::is_dumping_method_handles() is enabled.
5900     if (klass == vmClasses::ResolvedMethodName_klass() ||
5901         klass == vmClasses::MemberName_klass()) {
5902       return false;
5903     }
5904   }
5905 
5906   if (!AOTReferenceObjSupport::is_enabled() && klass->is_subclass_of(vmClasses::Reference_klass())) {
5907     return false;
5908   }
5909 
5910   return true;
5911 }
5912 #endif
5913 
5914 #ifndef PRODUCT
5915 
5916 // These functions exist to assert the validity of de-serialized offsets in boxing object as a sanity check.
5917 
5918 bool JavaClasses::check_offset(const char *klass_name, int deserialized_offset, const char *field_name,
5919                                const char* field_sig) {
5920   EXCEPTION_MARK;
5921   fieldDescriptor fd;
5922   TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name);
5923   Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
5924   InstanceKlass* ik = InstanceKlass::cast(k);
5925   TempNewSymbol f_name = SymbolTable::new_symbol(field_name);
5926   TempNewSymbol f_sig  = SymbolTable::new_symbol(field_sig);
5927   if (!ik->find_local_field(f_name, f_sig, &fd)) {
5928     tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
5929     return false;
5930   }
5931   if (fd.is_static()) {
5932     tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
5933     return false;
5934   }
5935   if (fd.offset() == deserialized_offset ) {
5936     return true;
5937   } else {
5938     tty->print_cr("Offset of nonstatic field %s.%s is deserialized as %d but should really be %d.",
5939                   klass_name, field_name, deserialized_offset, fd.offset());
5940     return false;
5941   }
5942 }
5943 
5944 void JavaClasses::check_offsets() {
5945   bool valid = true;
5946 
5947 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5948   valid &= check_offset(klass_name, cpp_klass_name :: _##field_name ## _offset, #field_name, field_sig)
5949 
5950 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5951   valid &= check_offset(klass_name, cpp_klass_name :: _##long_ ## field_name ## _offset, #field_name, field_sig)
5952 
5953   // Boxed primitive objects (java_lang_boxing_object)
5954 
5955   CHECK_OFFSET("java/lang/Boolean",   java_lang_boxing_object, value, "Z");
5956   CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
5957   CHECK_OFFSET("java/lang/Float",     java_lang_boxing_object, value, "F");
5958   CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
5959   CHECK_OFFSET("java/lang/Byte",      java_lang_boxing_object, value, "B");
5960   CHECK_OFFSET("java/lang/Short",     java_lang_boxing_object, value, "S");
5961   CHECK_OFFSET("java/lang/Integer",   java_lang_boxing_object, value, "I");
5962   CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
5963 
5964   if (!valid) vm_exit_during_initialization("Field offset verification failed");
5965 }
5966 
5967 #endif // PRODUCT
5968 
5969 int InjectedField::compute_offset() {
5970   InstanceKlass* ik = InstanceKlass::cast(klass());
5971   for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5972     if (!may_be_java && !fs.field_flags().is_injected()) {
5973       // Only look at injected fields
5974       continue;
5975     }
5976     if (fs.name() == name() && fs.signature() == signature()) {
5977       return fs.offset();
5978     }
5979   }
5980   ResourceMark rm;
5981   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)" : "");
5982 #ifndef PRODUCT
5983   ik->print();
5984   tty->print_cr("all fields:");
5985   for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5986     tty->print_cr("  name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_field_flags());
5987   }
5988 #endif //PRODUCT
5989   vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
5990   return -1;
5991 }
5992 
5993 void javaClasses_init() {
5994   JavaClasses::compute_offsets();
5995   JavaClasses::check_offsets();
5996   FilteredFieldsMap::initialize();  // must be done after computing offsets.
5997 }