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 "precompiled.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/flatArrayKlass.hpp"
  57 #include "oops/inlineKlass.inline.hpp"
  58 #include "oops/instanceKlass.inline.hpp"
  59 #include "oops/instanceMirrorKlass.inline.hpp"
  60 #include "oops/klass.hpp"
  61 #include "oops/klass.inline.hpp"
  62 #include "oops/method.inline.hpp"
  63 #include "oops/objArrayKlass.hpp"
  64 #include "oops/objArrayOop.inline.hpp"
  65 #include "oops/oopCast.inline.hpp"
  66 #include "oops/oop.inline.hpp"
  67 #include "oops/symbol.hpp"
  68 #include "oops/recordComponent.hpp"
  69 #include "oops/typeArrayOop.inline.hpp"
  70 #include "prims/jvmtiExport.hpp"
  71 #include "prims/methodHandles.hpp"
  72 #include "prims/resolvedMethodTable.hpp"
  73 #include "runtime/continuationEntry.inline.hpp"
  74 #include "runtime/continuationJavaClasses.inline.hpp"
  75 #include "runtime/fieldDescriptor.inline.hpp"
  76 #include "runtime/frame.inline.hpp"
  77 #include "runtime/handles.inline.hpp"
  78 #include "runtime/handshake.hpp"
  79 #include "runtime/init.hpp"
  80 #include "runtime/interfaceSupport.inline.hpp"
  81 #include "runtime/java.hpp"
  82 #include "runtime/javaCalls.hpp"
  83 #include "runtime/javaThread.hpp"
  84 #include "runtime/jniHandles.inline.hpp"
  85 #include "runtime/reflectionUtils.hpp"
  86 #include "runtime/safepoint.hpp"
  87 #include "runtime/safepointVerifiers.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 
 874 bool java_lang_Class::_offsets_computed = false;
 875 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = nullptr;
 876 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = nullptr;
 877 
 878 #ifdef ASSERT
 879 inline static void assert_valid_static_string_field(fieldDescriptor* fd) {
 880   assert(fd->has_initial_value(), "caller should have checked this");
 881   assert(fd->field_type() == T_OBJECT, "caller should have checked this");
 882   assert(fd->signature() == vmSymbols::string_signature(), "just checking");
 883 }
 884 #endif
 885 
 886 static void initialize_static_string_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
 887   DEBUG_ONLY(assert_valid_static_string_field(fd);)
 888   oop string = fd->string_initial_value(CHECK);
 889   mirror()->obj_field_put(fd->offset(), string);
 890 }
 891 
 892 static void initialize_static_primitive_field(fieldDescriptor* fd, Handle mirror) {
 893   assert(fd->has_initial_value(), "caller should have checked this");
 894   BasicType t = fd->field_type();
 895   switch (t) {
 896   case T_BYTE:
 897     mirror()->byte_field_put(fd->offset(), (jbyte)(fd->int_initial_value()));
 898     break;
 899   case T_BOOLEAN:
 900     mirror()->bool_field_put(fd->offset(), (jboolean)(fd->int_initial_value()));
 901     break;
 902   case T_CHAR:
 903     mirror()->char_field_put(fd->offset(), (jchar)(fd->int_initial_value()));
 904     break;
 905   case T_SHORT:
 906     mirror()->short_field_put(fd->offset(), (jshort)(fd->int_initial_value()));
 907     break;
 908   case T_INT:
 909     mirror()->int_field_put(fd->offset(), fd->int_initial_value());
 910     break;
 911   case T_FLOAT:
 912     mirror()->float_field_put(fd->offset(), fd->float_initial_value());
 913     break;
 914   case T_DOUBLE:
 915     mirror()->double_field_put(fd->offset(), fd->double_initial_value());
 916     break;
 917   case T_LONG:
 918     mirror()->long_field_put(fd->offset(), fd->long_initial_value());
 919     break;
 920   default:
 921     // Illegal ConstantValue attribute in class file should have been
 922     // caught during classfile parsing.
 923     ShouldNotReachHere();
 924   }
 925 }
 926 
 927 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
 928   assert(mirror.not_null() && fd->is_static(), "just checking");
 929   if (fd->has_initial_value()) {
 930     if (fd->field_type() != T_OBJECT) {
 931       initialize_static_primitive_field(fd, mirror);
 932     } else {
 933       initialize_static_string_field(fd, mirror, CHECK);
 934     }
 935   }
 936 }
 937 
 938 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
 939   assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
 940 
 941   // If the offset was read from the shared archive, it was fixed up already
 942   if (!k->is_shared()) {
 943     if (k->is_instance_klass()) {
 944       // During bootstrap, java.lang.Class wasn't loaded so static field
 945       // offsets were computed without the size added it.  Go back and
 946       // update all the static field offsets to included the size.
 947 
 948       // Unfortunately, the FieldInfo stream is encoded with UNSIGNED5 which doesn't allow
 949       // content updates. So the FieldInfo stream has to be decompressed into a temporary array,
 950       // static fields offsets are updated in this array before reencoding everything into
 951       // a new UNSIGNED5 stream, and substitute it to the old FieldInfo stream.
 952 
 953       int java_fields;
 954       int injected_fields;
 955       InstanceKlass* ik = InstanceKlass::cast(k);
 956       GrowableArray<FieldInfo>* fields =
 957         FieldInfoStream::create_FieldInfoArray(ik->fieldinfo_stream(),
 958                                                &java_fields, &injected_fields);
 959       for (int i = 0; i < fields->length(); i++) {
 960         FieldInfo* fi = fields->adr_at(i);
 961         if (fi->access_flags().is_static()) {
 962           fi->set_offset(fi->offset() + InstanceMirrorKlass::offset_of_static_fields());
 963         }
 964       }
 965       Array<u1>* old_stream = ik->fieldinfo_stream();
 966       assert(fields->length() == (java_fields + injected_fields), "Must be");
 967       Array<u1>* new_fis = FieldInfoStream::create_FieldInfoStream(fields, java_fields, injected_fields, k->class_loader_data(), CHECK);
 968       ik->set_fieldinfo_stream(new_fis);
 969       MetadataFactory::free_array<u1>(k->class_loader_data(), old_stream);
 970     }
 971   }
 972 
 973   if (k->is_shared() && k->has_archived_mirror_index()) {
 974     if (ArchiveHeapLoader::is_in_use()) {
 975       bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK);
 976       assert(present, "Missing archived mirror for %s", k->external_name());
 977       return;
 978     } else {
 979       k->clear_java_mirror_handle();
 980       k->clear_archived_mirror_index();
 981     }
 982   }
 983   create_mirror(k, Handle(), Handle(), Handle(), Handle(), CHECK);
 984 }
 985 
 986 void java_lang_Class::initialize_mirror_fields(Klass* k,
 987                                                Handle mirror,
 988                                                Handle protection_domain,
 989                                                Handle classData,
 990                                                TRAPS) {
 991   // Allocate a simple java object for a lock.
 992   // This needs to be a java object because during class initialization
 993   // it can be held across a java call.
 994   typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
 995   set_init_lock(mirror(), r);
 996 
 997   // Set protection domain also
 998   set_protection_domain(mirror(), protection_domain());
 999 
1000   // Initialize static fields
1001   InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK);
1002 
1003  // Set classData
1004   set_class_data(mirror(), classData());
1005 }
1006 
1007 // Set the java.lang.Module module field in the java_lang_Class mirror
1008 void java_lang_Class::set_mirror_module_field(JavaThread* current, Klass* k, Handle mirror, Handle module) {
1009   if (module.is_null()) {
1010     // During startup, the module may be null only if java.base has not been defined yet.
1011     // Put the class on the fixup_module_list to patch later when the java.lang.Module
1012     // for java.base is known. But note that since we captured the null module another
1013     // thread may have completed that initialization.
1014 
1015     bool javabase_was_defined = false;
1016     {
1017       MutexLocker m1(current, Module_lock);
1018       // Keep list of classes needing java.base module fixup
1019       if (!ModuleEntryTable::javabase_defined()) {
1020         assert(k->java_mirror() != nullptr, "Class's mirror is null");
1021         k->class_loader_data()->inc_keep_alive_ref_count();
1022         assert(fixup_module_field_list() != nullptr, "fixup_module_field_list not initialized");
1023         fixup_module_field_list()->push(k);
1024       } else {
1025         javabase_was_defined = true;
1026       }
1027     }
1028 
1029     // If java.base was already defined then patch this particular class with java.base.
1030     if (javabase_was_defined) {
1031       ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
1032       assert(javabase_entry != nullptr && javabase_entry->module() != nullptr,
1033              "Setting class module field, " JAVA_BASE_NAME " should be defined");
1034       Handle javabase_handle(current, javabase_entry->module());
1035       set_module(mirror(), javabase_handle());
1036     }
1037   } else {
1038     assert(Universe::is_module_initialized() ||
1039            (ModuleEntryTable::javabase_defined() &&
1040             (module() == ModuleEntryTable::javabase_moduleEntry()->module())),
1041            "Incorrect java.lang.Module specification while creating mirror");
1042     set_module(mirror(), module());
1043   }
1044 }
1045 
1046 // Statically allocate fixup lists because they always get created.
1047 void java_lang_Class::allocate_fixup_lists() {
1048   GrowableArray<Klass*>* mirror_list =
1049     new (mtClass) GrowableArray<Klass*>(40, mtClass);
1050   set_fixup_mirror_list(mirror_list);
1051 
1052   GrowableArray<Klass*>* module_list =
1053     new (mtModule) GrowableArray<Klass*>(500, mtModule);
1054   set_fixup_module_field_list(module_list);
1055 }
1056 
1057 void java_lang_Class::allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData,
1058                                       Handle& mirror, Handle& comp_mirror, TRAPS) {
1059   // Allocate mirror (java.lang.Class instance)
1060   oop mirror_oop = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(k, CHECK);
1061   mirror = Handle(THREAD, mirror_oop);
1062 
1063   // Setup indirection from mirror->klass
1064   set_klass(mirror(), k);
1065 
1066   InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
1067   assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
1068 
1069   set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
1070 
1071   // It might also have a component mirror.  This mirror must already exist.
1072   if (k->is_array_klass()) {
1073     if (k->is_flatArray_klass()) {
1074       Klass* element_klass = (Klass*) FlatArrayKlass::cast(k)->element_klass();
1075       assert(element_klass->is_inline_klass(), "Must be inline type component");
1076       if (is_scratch) {
1077         comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass));
1078       } else {
1079         comp_mirror = Handle(THREAD, element_klass->java_mirror());
1080       }
1081     } else if (k->is_typeArray_klass()) {
1082       BasicType type = TypeArrayKlass::cast(k)->element_type();
1083       if (is_scratch) {
1084         comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(type));
1085       } else {
1086         comp_mirror = Handle(THREAD, Universe::java_mirror(type));
1087       }
1088     } else {
1089       assert(k->is_objArray_klass(), "Must be");
1090       Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1091       assert(element_klass != nullptr, "Must have an element klass");
1092       oop comp_oop = element_klass->java_mirror();
1093       if (is_scratch) {
1094         comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass));
1095       } else {
1096         comp_mirror = Handle(THREAD, comp_oop);
1097       }
1098     }
1099     assert(comp_mirror() != nullptr, "must have a mirror");
1100 
1101     // Two-way link between the array klass and its component mirror:
1102     // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
1103     set_component_mirror(mirror(), comp_mirror());
1104     // See below for ordering dependencies between field array_klass in component mirror
1105     // and java_mirror in this klass.
1106   } else {
1107     assert(k->is_instance_klass(), "Must be");
1108 
1109     initialize_mirror_fields(k, mirror, protection_domain, classData, THREAD);
1110     if (HAS_PENDING_EXCEPTION) {
1111       // If any of the fields throws an exception like OOM remove the klass field
1112       // from the mirror so GC doesn't follow it after the klass has been deallocated.
1113       // This mirror looks like a primitive type, which logically it is because it
1114       // it represents no class.
1115       set_klass(mirror(), nullptr);
1116       return;
1117     }
1118   }
1119 }
1120 
1121 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
1122                                     Handle module, Handle protection_domain,
1123                                     Handle classData, TRAPS) {
1124   assert(k != nullptr, "Use create_basic_type_mirror for primitive types");
1125   assert(k->java_mirror() == nullptr, "should only assign mirror once");
1126 
1127   // Class_klass has to be loaded because it is used to allocate
1128   // the mirror.
1129   if (vmClasses::Class_klass_loaded()) {
1130     Handle mirror;
1131     Handle comp_mirror;
1132 
1133     allocate_mirror(k, /*is_scratch=*/false, protection_domain, classData, mirror, comp_mirror, CHECK);
1134 
1135     // set the classLoader field in the java_lang_Class instance
1136     assert(class_loader() == k->class_loader(), "should be same");
1137     set_class_loader(mirror(), class_loader());
1138 
1139     // Setup indirection from klass->mirror
1140     // after any exceptions can happen during allocations.
1141     k->set_java_mirror(mirror);
1142 
1143     // Set the module field in the java_lang_Class instance.  This must be done
1144     // after the mirror is set.
1145     set_mirror_module_field(THREAD, k, mirror, module);
1146 
1147     if (comp_mirror() != nullptr) {
1148       // Set after k->java_mirror() is published, because compiled code running
1149       // concurrently doesn't expect a k to have a null java_mirror.
1150       release_set_array_klass(comp_mirror(), k);
1151     }
1152 
1153     if (CDSConfig::is_dumping_heap()) {
1154       create_scratch_mirror(k, CHECK);
1155     }
1156   } else {
1157     assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1158     fixup_mirror_list()->push(k);
1159   }
1160 }
1161 
1162 #if INCLUDE_CDS_JAVA_HEAP
1163 // The "scratch mirror" stores the states of the mirror object that can be
1164 // decided at dump time (such as the initial values of the static fields, the
1165 // component mirror, etc). At runtime, more information is added to it by
1166 // java_lang_Class::restore_archived_mirror().
1167 //
1168 // Essentially, /*dumptime*/create_scratch_mirror() + /*runtime*/restore_archived_mirror()
1169 // produces the same result as /*runtime*/create_mirror().
1170 //
1171 // Note: we archive the "scratch mirror" instead of k->java_mirror(), because the
1172 // latter may contain dumptime-specific information that cannot be archived
1173 // (e.g., ClassLoaderData*, or static fields that are modified by Java code execution).
1174 void java_lang_Class::create_scratch_mirror(Klass* k, TRAPS) {
1175   if ((k->class_loader() != nullptr &&
1176        k->class_loader() != SystemDictionary::java_platform_loader() &&
1177        k->class_loader() != SystemDictionary::java_system_loader())) {
1178     // We only archive the mirrors of classes loaded by the built-in loaders
1179     return;
1180   }
1181 
1182   Handle protection_domain, classData; // set to null. Will be reinitialized at runtime
1183   Handle mirror;
1184   Handle comp_mirror;
1185   allocate_mirror(k, /*is_scratch=*/true, protection_domain, classData, mirror, comp_mirror, CHECK);
1186 
1187   if (comp_mirror() != nullptr) {
1188     release_set_array_klass(comp_mirror(), k);
1189   }
1190 
1191   HeapShared::set_scratch_java_mirror(k, mirror());
1192 }
1193 
1194 // Returns true if the mirror is updated, false if no archived mirror
1195 // data is present. After the archived mirror object is restored, the
1196 // shared klass' _has_raw_archived_mirror flag is cleared.
1197 bool java_lang_Class::restore_archived_mirror(Klass *k,
1198                                               Handle class_loader, Handle module,
1199                                               Handle protection_domain, TRAPS) {
1200   // Postpone restoring archived mirror until java.lang.Class is loaded. Please
1201   // see more details in vmClasses::resolve_all().
1202   if (!vmClasses::Class_klass_loaded()) {
1203     assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1204     fixup_mirror_list()->push(k);
1205     return true;
1206   }
1207 
1208   oop m = k->archived_java_mirror();
1209   assert(m != nullptr, "must have stored non-null archived mirror");
1210 
1211   // Sanity: clear it now to prevent re-initialization if any of the following fails
1212   k->clear_archived_mirror_index();
1213 
1214   // mirror is archived, restore
1215   log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1216   assert(as_Klass(m) == k, "must be");
1217   Handle mirror(THREAD, m);
1218 
1219   if (!k->is_array_klass()) {
1220     // - local static final fields with initial values were initialized at dump time
1221 
1222     // create the init_lock
1223     typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false));
1224     set_init_lock(mirror(), r);
1225 
1226     if (protection_domain.not_null()) {
1227       set_protection_domain(mirror(), protection_domain());
1228     }
1229   }
1230 
1231   assert(class_loader() == k->class_loader(), "should be same");
1232   if (class_loader.not_null()) {
1233     set_class_loader(mirror(), class_loader());
1234   }
1235 
1236   k->set_java_mirror(mirror);
1237 
1238   set_mirror_module_field(THREAD, k, mirror, module);
1239 
1240   if (log_is_enabled(Trace, cds, heap, mirror)) {
1241     ResourceMark rm(THREAD);
1242     log_trace(cds, heap, mirror)(
1243         "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1244   }
1245 
1246   return true;
1247 }
1248 #endif // INCLUDE_CDS_JAVA_HEAP
1249 
1250 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1251   assert(_module_offset != 0, "must have been computed already");
1252   set_module(k->java_mirror(), module());
1253 }
1254 
1255 void java_lang_Class::set_oop_size(HeapWord* java_class, size_t size) {
1256   assert(_oop_size_offset != 0, "must be set");
1257   assert(size > 0, "Oop size must be greater than zero, not " SIZE_FORMAT, size);
1258   assert(size <= INT_MAX, "Lossy conversion: " SIZE_FORMAT, size);
1259   *(int*)(((char*)java_class) + _oop_size_offset) = (int)size;
1260 }
1261 
1262 int  java_lang_Class::static_oop_field_count(oop java_class) {
1263   assert(_static_oop_field_count_offset != 0, "must be set");
1264   return java_class->int_field(_static_oop_field_count_offset);
1265 }
1266 
1267 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1268   assert(_static_oop_field_count_offset != 0, "must be set");
1269   java_class->int_field_put(_static_oop_field_count_offset, size);
1270 }
1271 
1272 oop java_lang_Class::protection_domain(oop java_class) {
1273   assert(_protection_domain_offset != 0, "must be set");
1274   return java_class->obj_field(_protection_domain_offset);
1275 }
1276 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1277   assert(_protection_domain_offset != 0, "must be set");
1278   java_class->obj_field_put(_protection_domain_offset, pd);
1279 }
1280 
1281 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1282   assert(_component_mirror_offset != 0, "must be set");
1283     java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1284   }
1285 oop java_lang_Class::component_mirror(oop java_class) {
1286   assert(_component_mirror_offset != 0, "must be set");
1287   return java_class->obj_field(_component_mirror_offset);
1288 }
1289 
1290 oop java_lang_Class::init_lock(oop java_class) {
1291   assert(_init_lock_offset != 0, "must be set");
1292   return java_class->obj_field(_init_lock_offset);
1293 }
1294 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
1295   assert(_init_lock_offset != 0, "must be set");
1296   java_class->obj_field_put(_init_lock_offset, init_lock);
1297 }
1298 
1299 objArrayOop java_lang_Class::signers(oop java_class) {
1300   assert(_signers_offset != 0, "must be set");
1301   return (objArrayOop)java_class->obj_field(_signers_offset);
1302 }
1303 
1304 oop java_lang_Class::class_data(oop java_class) {
1305   assert(_classData_offset != 0, "must be set");
1306   return java_class->obj_field(_classData_offset);
1307 }
1308 void java_lang_Class::set_class_data(oop java_class, oop class_data) {
1309   assert(_classData_offset != 0, "must be set");
1310   java_class->obj_field_put(_classData_offset, class_data);
1311 }
1312 
1313 void java_lang_Class::set_reflection_data(oop java_class, oop reflection_data) {
1314   assert(_reflectionData_offset != 0, "must be set");
1315   java_class->obj_field_put(_reflectionData_offset, reflection_data);
1316 }
1317 
1318 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1319   assert(_class_loader_offset != 0, "offsets should have been initialized");
1320   java_class->obj_field_put(_class_loader_offset, loader);
1321 }
1322 
1323 oop java_lang_Class::class_loader(oop java_class) {
1324   assert(_class_loader_offset != 0, "must be set");
1325   return java_class->obj_field(_class_loader_offset);
1326 }
1327 
1328 oop java_lang_Class::module(oop java_class) {
1329   assert(_module_offset != 0, "must be set");
1330   return java_class->obj_field(_module_offset);
1331 }
1332 
1333 void java_lang_Class::set_module(oop java_class, oop module) {
1334   assert(_module_offset != 0, "must be set");
1335   java_class->obj_field_put(_module_offset, module);
1336 }
1337 
1338 oop java_lang_Class::name(Handle java_class, TRAPS) {
1339   assert(_name_offset != 0, "must be set");
1340   oop o = java_class->obj_field(_name_offset);
1341   if (o == nullptr) {
1342     o = StringTable::intern(as_external_name(java_class()), THREAD);
1343     java_class->obj_field_put(_name_offset, o);
1344   }
1345   return o;
1346 }
1347 
1348 oop java_lang_Class::source_file(oop java_class) {
1349   assert(_source_file_offset != 0, "must be set");
1350   return java_class->obj_field(_source_file_offset);
1351 }
1352 
1353 void java_lang_Class::set_source_file(oop java_class, oop source_file) {
1354   assert(_source_file_offset != 0, "must be set");
1355   java_class->obj_field_put(_source_file_offset, source_file);
1356 }
1357 
1358 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1359   // This should be improved by adding a field at the Java level or by
1360   // introducing a new VM klass (see comment in ClassFileParser)
1361   oop java_class = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(nullptr, CHECK_NULL);
1362   if (type != T_VOID) {
1363     Klass* aklass = Universe::typeArrayKlass(type);
1364     assert(aklass != nullptr, "correct bootstrap");
1365     release_set_array_klass(java_class, aklass);
1366   }
1367 #ifdef ASSERT
1368   InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(vmClasses::Class_klass());
1369   assert(static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1370 #endif
1371   return java_class;
1372 }
1373 
1374 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1375   assert(is_instance(java_class), "must be a Class object");
1376   java_class->metadata_field_put(_klass_offset, klass);
1377 }
1378 
1379 
1380 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1381   assert(is_instance(java_class), "must be a Class object");
1382   Symbol* name = nullptr;
1383   bool is_instance = false;
1384   if (is_primitive(java_class)) {
1385     name = vmSymbols::type_signature(primitive_type(java_class));
1386   } else {
1387     Klass* k = as_Klass(java_class);
1388     is_instance = k->is_instance_klass();
1389     name = k->name();
1390   }
1391   if (name == nullptr) {
1392     st->print("<null>");
1393     return;
1394   }
1395   if (is_instance)  {
1396     st->print("L");
1397   }
1398   st->write((char*) name->base(), (int) name->utf8_length());
1399   if (is_instance)  st->print(";");
1400 }
1401 
1402 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) {
1403   assert(is_instance(java_class), "must be a Class object");
1404   Symbol* name;
1405   if (is_primitive(java_class)) {
1406     name = vmSymbols::type_signature(primitive_type(java_class));
1407     // Because this can create a new symbol, the caller has to decrement
1408     // the refcount, so make adjustment here and below for symbols returned
1409     // that are not created or incremented due to a successful lookup.
1410     name->increment_refcount();
1411   } else {
1412     Klass* k = as_Klass(java_class);
1413     if (!k->is_instance_klass()) {
1414       name = k->name();
1415       name->increment_refcount();
1416     } else {
1417       ResourceMark rm;
1418       const char* sigstr = k->signature_name();
1419       int         siglen = (int) strlen(sigstr);
1420       if (!intern_if_not_found) {
1421         name = SymbolTable::probe(sigstr, siglen);
1422       } else {
1423         name = SymbolTable::new_symbol(sigstr, siglen);
1424       }
1425     }
1426   }
1427   return name;
1428 }
1429 
1430 // Returns the Java name for this Java mirror (Resource allocated)
1431 // See Klass::external_name().
1432 // For primitive type Java mirrors, its type name is returned.
1433 const char* java_lang_Class::as_external_name(oop java_class) {
1434   assert(is_instance(java_class), "must be a Class object");
1435   const char* name = nullptr;
1436   if (is_primitive(java_class)) {
1437     name = type2name(primitive_type(java_class));
1438   } else {
1439     name = as_Klass(java_class)->external_name();
1440   }
1441   if (name == nullptr) {
1442     name = "<null>";
1443   }
1444   return name;
1445 }
1446 
1447 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1448   Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1449   assert(k == nullptr || (k->is_klass() && k->is_array_klass()), "should be array klass");
1450   return k;
1451 }
1452 
1453 
1454 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1455   assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1456   if (klass->is_flatArray_klass() || (klass->is_objArray_klass() && ObjArrayKlass::cast(klass)->is_null_free_array_klass())) {
1457     // TODO 8336006 Ignore flat / null-free arrays
1458     return;
1459   }
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 
1517 void java_lang_Class::compute_offsets() {
1518   if (_offsets_computed) {
1519     return;
1520   }
1521 
1522   _offsets_computed = true;
1523 
1524   InstanceKlass* k = vmClasses::Class_klass();
1525   CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1526   CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1527 }
1528 
1529 #if INCLUDE_CDS
1530 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1531   f->do_bool(&_offsets_computed);
1532 
1533   CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1534 
1535   CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1536 }
1537 #endif
1538 
1539 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1540   assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1541   return the_class_mirror->int_field(_classRedefinedCount_offset);
1542 }
1543 
1544 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1545   assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1546   the_class_mirror->int_field_put(_classRedefinedCount_offset, value);
1547 }
1548 
1549 
1550 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1551 //       platform thread structure, and a eetop offset which was used for thread
1552 //       local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1553 //       merged, so in the HotSpot VM we just use the eetop field for the thread
1554 //       instead of the privateInfo_offset.
1555 //
1556 // Note: The stackSize field is only present starting in 1.4.
1557 
1558 int java_lang_Thread_FieldHolder::_group_offset;
1559 int java_lang_Thread_FieldHolder::_priority_offset;
1560 int java_lang_Thread_FieldHolder::_stackSize_offset;
1561 int java_lang_Thread_FieldHolder::_daemon_offset;
1562 int java_lang_Thread_FieldHolder::_thread_status_offset;
1563 
1564 #define THREAD_FIELD_HOLDER_FIELDS_DO(macro) \
1565   macro(_group_offset,         k, vmSymbols::group_name(),    threadgroup_signature, false); \
1566   macro(_priority_offset,      k, vmSymbols::priority_name(), int_signature,         false); \
1567   macro(_stackSize_offset,     k, "stackSize",                long_signature,        false); \
1568   macro(_daemon_offset,        k, vmSymbols::daemon_name(),   bool_signature,        false); \
1569   macro(_thread_status_offset, k, "threadStatus",             int_signature,         false)
1570 
1571 void java_lang_Thread_FieldHolder::compute_offsets() {
1572   assert(_group_offset == 0, "offsets should be initialized only once");
1573 
1574   InstanceKlass* k = vmClasses::Thread_FieldHolder_klass();
1575   THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1576 }
1577 
1578 #if INCLUDE_CDS
1579 void java_lang_Thread_FieldHolder::serialize_offsets(SerializeClosure* f) {
1580   THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1581 }
1582 #endif
1583 
1584 oop java_lang_Thread_FieldHolder::threadGroup(oop holder) {
1585   return holder->obj_field(_group_offset);
1586 }
1587 
1588 ThreadPriority java_lang_Thread_FieldHolder::priority(oop holder) {
1589   return (ThreadPriority)holder->int_field(_priority_offset);
1590 }
1591 
1592 void java_lang_Thread_FieldHolder::set_priority(oop holder, ThreadPriority priority) {
1593   holder->int_field_put(_priority_offset, priority);
1594 }
1595 
1596 jlong java_lang_Thread_FieldHolder::stackSize(oop holder) {
1597   return holder->long_field(_stackSize_offset);
1598 }
1599 
1600 bool java_lang_Thread_FieldHolder::is_daemon(oop holder) {
1601   return holder->bool_field(_daemon_offset) != 0;
1602 }
1603 
1604 void java_lang_Thread_FieldHolder::set_daemon(oop holder, bool val) {
1605   assert(val, "daemon status is never turned off");
1606   holder->bool_field_put(_daemon_offset, val);
1607 }
1608 
1609 void java_lang_Thread_FieldHolder::set_thread_status(oop holder, JavaThreadStatus status) {
1610   holder->int_field_put(_thread_status_offset, static_cast<int>(status));
1611 }
1612 
1613 JavaThreadStatus java_lang_Thread_FieldHolder::get_thread_status(oop holder) {
1614   return static_cast<JavaThreadStatus>(holder->int_field(_thread_status_offset));
1615 }
1616 
1617 
1618 int java_lang_Thread_Constants::_static_VTHREAD_GROUP_offset = 0;
1619 
1620 #define THREAD_CONSTANTS_STATIC_FIELDS_DO(macro) \
1621   macro(_static_VTHREAD_GROUP_offset,             k, "VTHREAD_GROUP",             threadgroup_signature, true);
1622 
1623 void java_lang_Thread_Constants::compute_offsets() {
1624   assert(_static_VTHREAD_GROUP_offset == 0, "offsets should be initialized only once");
1625 
1626   InstanceKlass* k = vmClasses::Thread_Constants_klass();
1627   THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1628 }
1629 
1630 #if INCLUDE_CDS
1631 void java_lang_Thread_Constants::serialize_offsets(SerializeClosure* f) {
1632   THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1633 }
1634 #endif
1635 
1636 oop java_lang_Thread_Constants::get_VTHREAD_GROUP() {
1637   InstanceKlass* k = vmClasses::Thread_Constants_klass();
1638   oop base = k->static_field_base_raw();
1639   return base->obj_field(_static_VTHREAD_GROUP_offset);
1640 }
1641 
1642 
1643 int java_lang_Thread::_holder_offset;
1644 int java_lang_Thread::_name_offset;
1645 int java_lang_Thread::_contextClassLoader_offset;
1646 int java_lang_Thread::_eetop_offset;
1647 int java_lang_Thread::_jvmti_thread_state_offset;
1648 int java_lang_Thread::_jvmti_VTMS_transition_disable_count_offset;
1649 int java_lang_Thread::_jvmti_is_in_VTMS_transition_offset;
1650 int java_lang_Thread::_interrupted_offset;
1651 int java_lang_Thread::_interruptLock_offset;
1652 int java_lang_Thread::_tid_offset;
1653 int java_lang_Thread::_continuation_offset;
1654 int java_lang_Thread::_park_blocker_offset;
1655 int java_lang_Thread::_scopedValueBindings_offset;
1656 JFR_ONLY(int java_lang_Thread::_jfr_epoch_offset;)
1657 
1658 #define THREAD_FIELDS_DO(macro) \
1659   macro(_holder_offset,        k, "holder", thread_fieldholder_signature, false); \
1660   macro(_name_offset,          k, vmSymbols::name_name(), string_signature, false); \
1661   macro(_contextClassLoader_offset, k, "contextClassLoader", classloader_signature, false); \
1662   macro(_eetop_offset,         k, "eetop", long_signature, false); \
1663   macro(_interrupted_offset,   k, "interrupted", bool_signature, false); \
1664   macro(_interruptLock_offset, k, "interruptLock", object_signature, false); \
1665   macro(_tid_offset,           k, "tid", long_signature, false); \
1666   macro(_park_blocker_offset,  k, "parkBlocker", object_signature, false); \
1667   macro(_continuation_offset,  k, "cont", continuation_signature, false); \
1668   macro(_scopedValueBindings_offset, k, "scopedValueBindings", object_signature, false);
1669 
1670 void java_lang_Thread::compute_offsets() {
1671   assert(_holder_offset == 0, "offsets should be initialized only once");
1672 
1673   InstanceKlass* k = vmClasses::Thread_klass();
1674   THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1675   THREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1676 }
1677 
1678 #if INCLUDE_CDS
1679 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1680   THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1681   THREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1682 }
1683 #endif
1684 
1685 JavaThread* java_lang_Thread::thread(oop java_thread) {
1686   return reinterpret_cast<JavaThread*>(java_thread->address_field(_eetop_offset));
1687 }
1688 
1689 JavaThread* java_lang_Thread::thread_acquire(oop java_thread) {
1690   return reinterpret_cast<JavaThread*>(java_thread->address_field_acquire(_eetop_offset));
1691 }
1692 
1693 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1694   java_thread->address_field_put(_eetop_offset, (address)thread);
1695 }
1696 
1697 void java_lang_Thread::release_set_thread(oop java_thread, JavaThread* thread) {
1698   java_thread->release_address_field_put(_eetop_offset, (address)thread);
1699 }
1700 
1701 JvmtiThreadState* java_lang_Thread::jvmti_thread_state(oop java_thread) {
1702   return (JvmtiThreadState*)java_thread->address_field(_jvmti_thread_state_offset);
1703 }
1704 
1705 void java_lang_Thread::set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state) {
1706   java_thread->address_field_put(_jvmti_thread_state_offset, (address)state);
1707 }
1708 
1709 int java_lang_Thread::VTMS_transition_disable_count(oop java_thread) {
1710   return java_thread->int_field(_jvmti_VTMS_transition_disable_count_offset);
1711 }
1712 
1713 void java_lang_Thread::inc_VTMS_transition_disable_count(oop java_thread) {
1714   assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1715   int val = VTMS_transition_disable_count(java_thread);
1716   java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val + 1);
1717 }
1718 
1719 void java_lang_Thread::dec_VTMS_transition_disable_count(oop java_thread) {
1720   assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1721   int val = VTMS_transition_disable_count(java_thread);
1722   assert(val > 0, "VTMS_transition_disable_count should never be negative");
1723   java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val - 1);
1724 }
1725 
1726 bool java_lang_Thread::is_in_VTMS_transition(oop java_thread) {
1727   return java_thread->bool_field_volatile(_jvmti_is_in_VTMS_transition_offset);
1728 }
1729 
1730 void java_lang_Thread::set_is_in_VTMS_transition(oop java_thread, bool val) {
1731   assert(is_in_VTMS_transition(java_thread) != val, "already %s transition", val ? "inside" : "outside");
1732   java_thread->bool_field_put_volatile(_jvmti_is_in_VTMS_transition_offset, val);
1733 }
1734 
1735 int java_lang_Thread::is_in_VTMS_transition_offset() {
1736   return _jvmti_is_in_VTMS_transition_offset;
1737 }
1738 
1739 void java_lang_Thread::clear_scopedValueBindings(oop java_thread) {
1740   assert(java_thread != nullptr, "need a java_lang_Thread pointer here");
1741   java_thread->obj_field_put(_scopedValueBindings_offset, nullptr);
1742 }
1743 
1744 oop java_lang_Thread::holder(oop java_thread) {
1745   // Note: may return null if the thread is still attaching
1746   return java_thread->obj_field(_holder_offset);
1747 }
1748 oop java_lang_Thread::interrupt_lock(oop java_thread) {
1749   return java_thread->obj_field(_interruptLock_offset);
1750 }
1751 
1752 bool java_lang_Thread::interrupted(oop java_thread) {
1753   // Make sure the caller can safely access oops.
1754   assert(Thread::current()->is_VM_thread() ||
1755          (JavaThread::current()->thread_state() != _thread_blocked &&
1756           JavaThread::current()->thread_state() != _thread_in_native),
1757          "Unsafe access to oop");
1758   return java_thread->bool_field_volatile(_interrupted_offset);
1759 }
1760 
1761 void java_lang_Thread::set_interrupted(oop java_thread, bool val) {
1762   // Make sure the caller can safely access oops.
1763   assert(Thread::current()->is_VM_thread() ||
1764          (JavaThread::current()->thread_state() != _thread_blocked &&
1765           JavaThread::current()->thread_state() != _thread_in_native),
1766          "Unsafe access to oop");
1767   java_thread->bool_field_put_volatile(_interrupted_offset, val);
1768 }
1769 
1770 
1771 oop java_lang_Thread::name(oop java_thread) {
1772   return java_thread->obj_field(_name_offset);
1773 }
1774 
1775 
1776 void java_lang_Thread::set_name(oop java_thread, oop name) {
1777   java_thread->obj_field_put(_name_offset, name);
1778 }
1779 
1780 // Convenience macros for setting and getting Thread fields that
1781 // are actually stored in the FieldHolder object of the thread.
1782 // The FieldHolder can be null whilst a thread is attaching via
1783 // JNI, and when the main thread is attaching.
1784 
1785 // The default value should be the default/zero initialized value
1786 // of the field as it would be in java.lang.Thread.FieldHolder.
1787 #define GET_FIELDHOLDER_FIELD(java_thread, field, default_val)  \
1788   {                                                             \
1789     oop holder = java_lang_Thread::holder(java_thread);         \
1790     if (holder != nullptr)                                      \
1791       return java_lang_Thread_FieldHolder::field(holder);       \
1792     else                                                        \
1793       return default_val;                                       \
1794   }
1795 
1796 // We should never be trying to set a field of an attaching thread.
1797 #define SET_FIELDHOLDER_FIELD(java_thread, field, value)        \
1798   {                                                             \
1799     oop holder = java_lang_Thread::holder(java_thread);         \
1800     assert(holder != nullptr, "Thread not fully initialized");  \
1801     java_lang_Thread_FieldHolder::set_##field(holder, value);   \
1802   }
1803 
1804 
1805 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1806   GET_FIELDHOLDER_FIELD(java_thread, priority, (ThreadPriority)0);
1807 }
1808 
1809 
1810 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1811   SET_FIELDHOLDER_FIELD(java_thread, priority, priority)
1812 }
1813 
1814 
1815 oop java_lang_Thread::threadGroup(oop java_thread) {
1816   GET_FIELDHOLDER_FIELD(java_thread, threadGroup, nullptr);
1817 }
1818 
1819 
1820 bool java_lang_Thread::is_alive(oop java_thread) {
1821   JavaThread* thr = java_lang_Thread::thread(java_thread);
1822   return (thr != nullptr);
1823 }
1824 
1825 
1826 bool java_lang_Thread::is_daemon(oop java_thread) {
1827   GET_FIELDHOLDER_FIELD(java_thread, is_daemon, false);
1828 }
1829 
1830 
1831 void java_lang_Thread::set_daemon(oop java_thread) {
1832   SET_FIELDHOLDER_FIELD(java_thread, daemon, true);
1833 }
1834 
1835 oop java_lang_Thread::context_class_loader(oop java_thread) {
1836   return java_thread->obj_field(_contextClassLoader_offset);
1837 }
1838 
1839 
1840 jlong java_lang_Thread::stackSize(oop java_thread) {
1841   GET_FIELDHOLDER_FIELD(java_thread, stackSize, 0);
1842 }
1843 
1844 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1845 void java_lang_Thread::set_thread_status(oop java_thread, JavaThreadStatus status) {
1846   SET_FIELDHOLDER_FIELD(java_thread, thread_status, status);
1847 }
1848 
1849 // Read thread status value from threadStatus field in java.lang.Thread java class.
1850 JavaThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1851   // Make sure the caller is operating on behalf of the VM or is
1852   // running VM code (state == _thread_in_vm).
1853   assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1854          JavaThread::current()->thread_state() == _thread_in_vm,
1855          "Java Thread is not running in vm");
1856   GET_FIELDHOLDER_FIELD(java_thread, get_thread_status, JavaThreadStatus::NEW /* not initialized */);
1857 }
1858 
1859 ByteSize java_lang_Thread::thread_id_offset() {
1860   return in_ByteSize(_tid_offset);
1861 }
1862 
1863 oop java_lang_Thread::park_blocker(oop java_thread) {
1864   return java_thread->obj_field(_park_blocker_offset);
1865 }
1866 
1867 oop java_lang_Thread::async_get_stack_trace(oop java_thread, TRAPS) {
1868   ThreadsListHandle tlh(JavaThread::current());
1869   JavaThread* thread;
1870   bool is_virtual = java_lang_VirtualThread::is_instance(java_thread);
1871   if (is_virtual) {
1872     oop carrier_thread = java_lang_VirtualThread::carrier_thread(java_thread);
1873     if (carrier_thread == nullptr) {
1874       return nullptr;
1875     }
1876     thread = java_lang_Thread::thread(carrier_thread);
1877   } else {
1878     thread = java_lang_Thread::thread(java_thread);
1879   }
1880   if (thread == nullptr) {
1881     return nullptr;
1882   }
1883 
1884   class GetStackTraceClosure : public HandshakeClosure {
1885   public:
1886     const Handle _java_thread;
1887     int _depth;
1888     bool _retry_handshake;
1889     GrowableArray<Method*>* _methods;
1890     GrowableArray<int>*     _bcis;
1891 
1892     GetStackTraceClosure(Handle java_thread) :
1893         HandshakeClosure("GetStackTraceClosure"), _java_thread(java_thread), _depth(0), _retry_handshake(false),
1894         _methods(nullptr), _bcis(nullptr) {
1895     }
1896     ~GetStackTraceClosure() {
1897       delete _methods;
1898       delete _bcis;
1899     }
1900 
1901     bool read_reset_retry() {
1902       bool ret = _retry_handshake;
1903       // If we re-execute the handshake this method need to return false
1904       // when the handshake cannot be performed. (E.g. thread terminating)
1905       _retry_handshake = false;
1906       return ret;
1907     }
1908 
1909     void do_thread(Thread* th) {
1910       if (!Thread::current()->is_Java_thread()) {
1911         _retry_handshake = true;
1912         return;
1913       }
1914 
1915       JavaThread* thread = JavaThread::cast(th);
1916 
1917       if (!thread->has_last_Java_frame()) {
1918         return;
1919       }
1920 
1921       bool carrier = false;
1922       if (java_lang_VirtualThread::is_instance(_java_thread())) {
1923         // if (thread->vthread() != _java_thread()) // We might be inside a System.executeOnCarrierThread
1924         const ContinuationEntry* ce = thread->vthread_continuation();
1925         if (ce == nullptr || ce->cont_oop(thread) != java_lang_VirtualThread::continuation(_java_thread())) {
1926           return; // not mounted
1927         }
1928       } else {
1929         carrier = (thread->vthread_continuation() != nullptr);
1930       }
1931 
1932       const int max_depth = MaxJavaStackTraceDepth;
1933       const bool skip_hidden = !ShowHiddenFrames;
1934 
1935       // Pick minimum length that will cover most cases
1936       int init_length = 64;
1937       _methods = new (mtInternal) GrowableArray<Method*>(init_length, mtInternal);
1938       _bcis = new (mtInternal) GrowableArray<int>(init_length, mtInternal);
1939 
1940       int total_count = 0;
1941       for (vframeStream vfst(thread, false, false, carrier); // we don't process frames as we don't care about oops
1942            !vfst.at_end() && (max_depth == 0 || max_depth != total_count);
1943            vfst.next()) {
1944 
1945         if (skip_hidden && (vfst.method()->is_hidden() ||
1946                             vfst.method()->is_continuation_enter_intrinsic())) {
1947           continue;
1948         }
1949 
1950         _methods->push(vfst.method());
1951         _bcis->push(vfst.bci());
1952         total_count++;
1953       }
1954 
1955       _depth = total_count;
1956     }
1957   };
1958 
1959   // Handshake with target
1960   ResourceMark rm(THREAD);
1961   HandleMark   hm(THREAD);
1962   GetStackTraceClosure gstc(Handle(THREAD, java_thread));
1963   do {
1964    Handshake::execute(&gstc, &tlh, thread);
1965   } while (gstc.read_reset_retry());
1966 
1967   // Stop if no stack trace is found.
1968   if (gstc._depth == 0) {
1969     return nullptr;
1970   }
1971 
1972   // Convert to StackTraceElement array
1973   InstanceKlass* k = vmClasses::StackTraceElement_klass();
1974   assert(k != nullptr, "must be loaded in 1.4+");
1975   if (k->should_be_initialized()) {
1976     k->initialize(CHECK_NULL);
1977   }
1978   objArrayHandle trace = oopFactory::new_objArray_handle(k, gstc._depth, CHECK_NULL);
1979 
1980   for (int i = 0; i < gstc._depth; i++) {
1981     methodHandle method(THREAD, gstc._methods->at(i));
1982     oop element = java_lang_StackTraceElement::create(method,
1983                                                       gstc._bcis->at(i),
1984                                                       CHECK_NULL);
1985     trace->obj_at_put(i, element);
1986   }
1987 
1988   return trace();
1989 }
1990 
1991 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1992   JavaThreadStatus status = get_thread_status(java_thread);
1993   switch (status) {
1994     case JavaThreadStatus::NEW                      : return "NEW";
1995     case JavaThreadStatus::RUNNABLE                 : return "RUNNABLE";
1996     case JavaThreadStatus::SLEEPING                 : return "TIMED_WAITING (sleeping)";
1997     case JavaThreadStatus::IN_OBJECT_WAIT           : return "WAITING (on object monitor)";
1998     case JavaThreadStatus::IN_OBJECT_WAIT_TIMED     : return "TIMED_WAITING (on object monitor)";
1999     case JavaThreadStatus::PARKED                   : return "WAITING (parking)";
2000     case JavaThreadStatus::PARKED_TIMED             : return "TIMED_WAITING (parking)";
2001     case JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
2002     case JavaThreadStatus::TERMINATED               : return "TERMINATED";
2003     default                       : return "UNKNOWN";
2004   };
2005 }
2006 int java_lang_ThreadGroup::_parent_offset;
2007 int java_lang_ThreadGroup::_name_offset;
2008 int java_lang_ThreadGroup::_maxPriority_offset;
2009 int java_lang_ThreadGroup::_daemon_offset;
2010 
2011 oop  java_lang_ThreadGroup::parent(oop java_thread_group) {
2012   assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2013   return java_thread_group->obj_field(_parent_offset);
2014 }
2015 
2016 // ("name as oop" accessor is not necessary)
2017 
2018 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
2019   oop name = java_thread_group->obj_field(_name_offset);
2020   // ThreadGroup.name can be null
2021   if (name != nullptr) {
2022     return java_lang_String::as_utf8_string(name);
2023   }
2024   return nullptr;
2025 }
2026 
2027 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
2028   assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2029   return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
2030 }
2031 
2032 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
2033   assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2034   return java_thread_group->bool_field(_daemon_offset) != 0;
2035 }
2036 
2037 #define THREADGROUP_FIELDS_DO(macro) \
2038   macro(_parent_offset,      k, vmSymbols::parent_name(),      threadgroup_signature,         false); \
2039   macro(_name_offset,        k, vmSymbols::name_name(),        string_signature,              false); \
2040   macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature,                 false); \
2041   macro(_daemon_offset,      k, vmSymbols::daemon_name(),      bool_signature,                false);
2042 
2043 void java_lang_ThreadGroup::compute_offsets() {
2044   assert(_parent_offset == 0, "offsets should be initialized only once");
2045 
2046   InstanceKlass* k = vmClasses::ThreadGroup_klass();
2047   THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2048 }
2049 
2050 #if INCLUDE_CDS
2051 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
2052   THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2053 }
2054 #endif
2055 
2056 
2057 // java_lang_VirtualThread
2058 
2059 int java_lang_VirtualThread::static_vthread_scope_offset;
2060 int java_lang_VirtualThread::_carrierThread_offset;
2061 int java_lang_VirtualThread::_continuation_offset;
2062 int java_lang_VirtualThread::_state_offset;
2063 int java_lang_VirtualThread::_next_offset;
2064 int java_lang_VirtualThread::_onWaitingList_offset;
2065 int java_lang_VirtualThread::_notified_offset;
2066 int java_lang_VirtualThread::_timeout_offset;
2067 int java_lang_VirtualThread::_objectWaiter_offset;
2068 
2069 #define VTHREAD_FIELDS_DO(macro) \
2070   macro(static_vthread_scope_offset,       k, "VTHREAD_SCOPE",      continuationscope_signature, true);  \
2071   macro(_carrierThread_offset,             k, "carrierThread",      thread_signature,            false); \
2072   macro(_continuation_offset,              k, "cont",               continuation_signature,      false); \
2073   macro(_state_offset,                     k, "state",              int_signature,               false); \
2074   macro(_next_offset,                      k, "next",               vthread_signature,           false); \
2075   macro(_onWaitingList_offset,             k, "onWaitingList",      bool_signature,              false); \
2076   macro(_notified_offset,                  k, "notified",           bool_signature,              false); \
2077   macro(_timeout_offset,                   k, "timeout",            long_signature,              false);
2078 
2079 
2080 void java_lang_VirtualThread::compute_offsets() {
2081   InstanceKlass* k = vmClasses::VirtualThread_klass();
2082   VTHREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2083   VTHREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2084 }
2085 
2086 bool java_lang_VirtualThread::is_instance(oop obj) {
2087   return obj != nullptr && is_subclass(obj->klass());
2088 }
2089 
2090 oop java_lang_VirtualThread::carrier_thread(oop vthread) {
2091   oop thread = vthread->obj_field(_carrierThread_offset);
2092   return thread;
2093 }
2094 
2095 oop java_lang_VirtualThread::continuation(oop vthread) {
2096   oop cont = vthread->obj_field(_continuation_offset);
2097   return cont;
2098 }
2099 
2100 int java_lang_VirtualThread::state(oop vthread) {
2101   return vthread->int_field_acquire(_state_offset);
2102 }
2103 
2104 void java_lang_VirtualThread::set_state(oop vthread, int state) {
2105   vthread->release_int_field_put(_state_offset, state);
2106 }
2107 
2108 int java_lang_VirtualThread::cmpxchg_state(oop vthread, int old_state, int new_state) {
2109   jint* addr = vthread->field_addr<jint>(_state_offset);
2110   int res = Atomic::cmpxchg(addr, old_state, new_state);
2111   return res;
2112 }
2113 
2114 oop java_lang_VirtualThread::next(oop vthread) {
2115   return vthread->obj_field(_next_offset);
2116 }
2117 
2118 void java_lang_VirtualThread::set_next(oop vthread, oop next_vthread) {
2119   vthread->obj_field_put(_next_offset, next_vthread);
2120 }
2121 
2122 // Add vthread to the waiting list if it's not already in it. Multiple threads
2123 // could be trying to add vthread to the list at the same time, so we control
2124 // access with a cmpxchg on onWaitingList. The winner adds vthread to the list.
2125 // Method returns true if we added vthread to the list, false otherwise.
2126 bool java_lang_VirtualThread::set_onWaitingList(oop vthread, OopHandle& list_head) {
2127   jboolean* addr = vthread->field_addr<jboolean>(_onWaitingList_offset);
2128   jboolean vthread_on_list = Atomic::load(addr);
2129   if (!vthread_on_list) {
2130     vthread_on_list = Atomic::cmpxchg(addr, (jboolean)JNI_FALSE, (jboolean)JNI_TRUE);
2131     if (!vthread_on_list) {
2132       for (;;) {
2133         oop head = list_head.resolve();
2134         java_lang_VirtualThread::set_next(vthread, head);
2135         if (list_head.cmpxchg(head, vthread) == head) return true;
2136       }
2137     }
2138   }
2139   return false; // already on waiting list
2140 }
2141 
2142 void java_lang_VirtualThread::set_notified(oop vthread, jboolean value) {
2143   vthread->bool_field_put_volatile(_notified_offset, value);
2144 }
2145 
2146 jlong java_lang_VirtualThread::timeout(oop vthread) {
2147   return vthread->long_field(_timeout_offset);
2148 }
2149 
2150 void java_lang_VirtualThread::set_timeout(oop vthread, jlong value) {
2151   vthread->long_field_put(_timeout_offset, value);
2152 }
2153 
2154 JavaThreadStatus java_lang_VirtualThread::map_state_to_thread_status(int state) {
2155   JavaThreadStatus status = JavaThreadStatus::NEW;
2156   switch (state & ~SUSPENDED) {
2157     case NEW:
2158       status = JavaThreadStatus::NEW;
2159       break;
2160     case STARTED:
2161     case RUNNING:
2162     case PARKING:
2163     case TIMED_PARKING:
2164     case UNPARKED:
2165     case YIELDING:
2166     case YIELDED:
2167     case UNBLOCKED:
2168     case WAITING:
2169     case TIMED_WAITING:
2170       status = JavaThreadStatus::RUNNABLE;
2171       break;
2172     case PARKED:
2173     case PINNED:
2174       status = JavaThreadStatus::PARKED;
2175       break;
2176     case TIMED_PARKED:
2177     case TIMED_PINNED:
2178       status = JavaThreadStatus::PARKED_TIMED;
2179       break;
2180     case BLOCKING:
2181     case BLOCKED:
2182       status = JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER;
2183       break;
2184     case WAIT:
2185       status = JavaThreadStatus::IN_OBJECT_WAIT;
2186       break;
2187     case TIMED_WAIT:
2188       status = JavaThreadStatus::IN_OBJECT_WAIT_TIMED;
2189       break;
2190     case TERMINATED:
2191       status = JavaThreadStatus::TERMINATED;
2192       break;
2193     default:
2194       ShouldNotReachHere();
2195   }
2196   return status;
2197 }
2198 
2199 ObjectMonitor* java_lang_VirtualThread::current_pending_monitor(oop vthread) {
2200   ObjectWaiter* waiter = objectWaiter(vthread);
2201   if (waiter != nullptr && waiter->at_monitorenter()) {
2202     return waiter->monitor();
2203   }
2204   return nullptr;
2205 }
2206 
2207 ObjectMonitor* java_lang_VirtualThread::current_waiting_monitor(oop vthread) {
2208   ObjectWaiter* waiter = objectWaiter(vthread);
2209   if (waiter != nullptr && waiter->is_wait()) {
2210     return waiter->monitor();
2211   }
2212   return nullptr;
2213 }
2214 
2215 bool java_lang_VirtualThread::is_preempted(oop vthread) {
2216   oop continuation = java_lang_VirtualThread::continuation(vthread);
2217   assert(continuation != nullptr, "vthread with no continuation");
2218   stackChunkOop chunk = jdk_internal_vm_Continuation::tail(continuation);
2219   return chunk != nullptr && chunk->preempted();
2220 }
2221 
2222 #if INCLUDE_CDS
2223 void java_lang_VirtualThread::serialize_offsets(SerializeClosure* f) {
2224    VTHREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2225    VTHREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
2226 }
2227 #endif
2228 
2229 // java_lang_Throwable
2230 
2231 int java_lang_Throwable::_backtrace_offset;
2232 int java_lang_Throwable::_detailMessage_offset;
2233 int java_lang_Throwable::_stackTrace_offset;
2234 int java_lang_Throwable::_depth_offset;
2235 int java_lang_Throwable::_cause_offset;
2236 int java_lang_Throwable::_static_unassigned_stacktrace_offset;
2237 
2238 #define THROWABLE_FIELDS_DO(macro) \
2239   macro(_backtrace_offset,     k, "backtrace",     object_signature,                  false); \
2240   macro(_detailMessage_offset, k, "detailMessage", string_signature,                  false); \
2241   macro(_stackTrace_offset,    k, "stackTrace",    java_lang_StackTraceElement_array, false); \
2242   macro(_depth_offset,         k, "depth",         int_signature,                     false); \
2243   macro(_cause_offset,         k, "cause",         throwable_signature,               false); \
2244   macro(_static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
2245 
2246 void java_lang_Throwable::compute_offsets() {
2247   InstanceKlass* k = vmClasses::Throwable_klass();
2248   THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2249 }
2250 
2251 #if INCLUDE_CDS
2252 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
2253   THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2254 }
2255 #endif
2256 
2257 oop java_lang_Throwable::unassigned_stacktrace() {
2258   InstanceKlass* ik = vmClasses::Throwable_klass();
2259   oop base = ik->static_field_base_raw();
2260   return base->obj_field(_static_unassigned_stacktrace_offset);
2261 }
2262 
2263 oop java_lang_Throwable::backtrace(oop throwable) {
2264   return throwable->obj_field_acquire(_backtrace_offset);
2265 }
2266 
2267 
2268 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
2269   throwable->release_obj_field_put(_backtrace_offset, value);
2270 }
2271 
2272 int java_lang_Throwable::depth(oop throwable) {
2273   return throwable->int_field(_depth_offset);
2274 }
2275 
2276 void java_lang_Throwable::set_depth(oop throwable, int value) {
2277   throwable->int_field_put(_depth_offset, value);
2278 }
2279 
2280 oop java_lang_Throwable::message(oop throwable) {
2281   return throwable->obj_field(_detailMessage_offset);
2282 }
2283 
2284 const char* java_lang_Throwable::message_as_utf8(oop throwable) {
2285   oop msg = java_lang_Throwable::message(throwable);
2286   const char* msg_utf8 = nullptr;
2287   if (msg != nullptr) {
2288     msg_utf8 = java_lang_String::as_utf8_string(msg);
2289   }
2290   return msg_utf8;
2291 }
2292 
2293 oop java_lang_Throwable::cause(oop throwable) {
2294   return throwable->obj_field(_cause_offset);
2295 }
2296 
2297 void java_lang_Throwable::set_message(oop throwable, oop value) {
2298   throwable->obj_field_put(_detailMessage_offset, value);
2299 }
2300 
2301 
2302 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
2303   throwable->obj_field_put(_stackTrace_offset, st_element_array);
2304 }
2305 
2306 void java_lang_Throwable::clear_stacktrace(oop throwable) {
2307   set_stacktrace(throwable, nullptr);
2308 }
2309 
2310 
2311 void java_lang_Throwable::print(oop throwable, outputStream* st) {
2312   ResourceMark rm;
2313   Klass* k = throwable->klass();
2314   assert(k != nullptr, "just checking");
2315   st->print("%s", k->external_name());
2316   oop msg = message(throwable);
2317   if (msg != nullptr) {
2318     st->print(": %s", java_lang_String::as_utf8_string(msg));
2319   }
2320 }
2321 
2322 // After this many redefines, the stack trace is unreliable.
2323 const int MAX_VERSION = USHRT_MAX;
2324 
2325 static inline bool version_matches(Method* method, int version) {
2326   assert(version < MAX_VERSION, "version is too big");
2327   return method != nullptr && (method->constants()->version() == version);
2328 }
2329 
2330 // This class provides a simple wrapper over the internal structure of
2331 // exception backtrace to insulate users of the backtrace from needing
2332 // to know what it looks like.
2333 // The code of this class is not GC safe. Allocations can only happen
2334 // in expand().
2335 class BacktraceBuilder: public StackObj {
2336  friend class BacktraceIterator;
2337  private:
2338   Handle          _backtrace;
2339   objArrayOop     _head;
2340   typeArrayOop    _methods;
2341   typeArrayOop    _bcis;
2342   objArrayOop     _mirrors;
2343   typeArrayOop    _names; // Needed to insulate method name against redefinition.
2344   // True if the top frame of the backtrace is omitted because it shall be hidden.
2345   bool            _has_hidden_top_frame;
2346   int             _index;
2347   NoSafepointVerifier _nsv;
2348 
2349   enum {
2350     trace_methods_offset = java_lang_Throwable::trace_methods_offset,
2351     trace_bcis_offset    = java_lang_Throwable::trace_bcis_offset,
2352     trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
2353     trace_names_offset   = java_lang_Throwable::trace_names_offset,
2354     trace_conts_offset   = java_lang_Throwable::trace_conts_offset,
2355     trace_next_offset    = java_lang_Throwable::trace_next_offset,
2356     trace_hidden_offset  = java_lang_Throwable::trace_hidden_offset,
2357     trace_size           = java_lang_Throwable::trace_size,
2358     trace_chunk_size     = java_lang_Throwable::trace_chunk_size
2359   };
2360 
2361   // get info out of chunks
2362   static typeArrayOop get_methods(objArrayHandle chunk) {
2363     typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
2364     assert(methods != nullptr, "method array should be initialized in backtrace");
2365     return methods;
2366   }
2367   static typeArrayOop get_bcis(objArrayHandle chunk) {
2368     typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
2369     assert(bcis != nullptr, "bci array should be initialized in backtrace");
2370     return bcis;
2371   }
2372   static objArrayOop get_mirrors(objArrayHandle chunk) {
2373     objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
2374     assert(mirrors != nullptr, "mirror array should be initialized in backtrace");
2375     return mirrors;
2376   }
2377   static typeArrayOop get_names(objArrayHandle chunk) {
2378     typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2379     assert(names != nullptr, "names array should be initialized in backtrace");
2380     return names;
2381   }
2382   static bool has_hidden_top_frame(objArrayHandle chunk) {
2383     oop hidden = chunk->obj_at(trace_hidden_offset);
2384     return hidden != nullptr;
2385   }
2386 
2387  public:
2388 
2389   // constructor for new backtrace
2390   BacktraceBuilder(TRAPS): _head(nullptr), _methods(nullptr), _bcis(nullptr), _mirrors(nullptr), _names(nullptr), _has_hidden_top_frame(false) {
2391     expand(CHECK);
2392     _backtrace = Handle(THREAD, _head);
2393     _index = 0;
2394   }
2395 
2396   BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2397     _methods = get_methods(backtrace);
2398     _bcis = get_bcis(backtrace);
2399     _mirrors = get_mirrors(backtrace);
2400     _names = get_names(backtrace);
2401     _has_hidden_top_frame = has_hidden_top_frame(backtrace);
2402     assert(_methods->length() == _bcis->length() &&
2403            _methods->length() == _mirrors->length() &&
2404            _mirrors->length() == _names->length(),
2405            "method and source information arrays should match");
2406 
2407     // head is the preallocated backtrace
2408     _head = backtrace();
2409     _backtrace = Handle(thread, _head);
2410     _index = 0;
2411   }
2412 
2413   void expand(TRAPS) {
2414     objArrayHandle old_head(THREAD, _head);
2415     PauseNoSafepointVerifier pnsv(&_nsv);
2416 
2417     objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2418     objArrayHandle new_head(THREAD, head);
2419 
2420     typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2421     typeArrayHandle new_methods(THREAD, methods);
2422 
2423     typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2424     typeArrayHandle new_bcis(THREAD, bcis);
2425 
2426     objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2427     objArrayHandle new_mirrors(THREAD, mirrors);
2428 
2429     typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2430     typeArrayHandle new_names(THREAD, names);
2431 
2432     if (!old_head.is_null()) {
2433       old_head->obj_at_put(trace_next_offset, new_head());
2434     }
2435     new_head->obj_at_put(trace_methods_offset, new_methods());
2436     new_head->obj_at_put(trace_bcis_offset, new_bcis());
2437     new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2438     new_head->obj_at_put(trace_names_offset, new_names());
2439     new_head->obj_at_put(trace_hidden_offset, nullptr);
2440 
2441     _head    = new_head();
2442     _methods = new_methods();
2443     _bcis = new_bcis();
2444     _mirrors = new_mirrors();
2445     _names  = new_names();
2446     _index = 0;
2447   }
2448 
2449   oop backtrace() {
2450     return _backtrace();
2451   }
2452 
2453   inline void push(Method* method, int bci, TRAPS) {
2454     // Smear the -1 bci to 0 since the array only holds unsigned
2455     // shorts.  The later line number lookup would just smear the -1
2456     // to a 0 even if it could be recorded.
2457     if (bci == SynchronizationEntryBCI) bci = 0;
2458 
2459     if (_index >= trace_chunk_size) {
2460       methodHandle mhandle(THREAD, method);
2461       expand(CHECK);
2462       method = mhandle();
2463     }
2464 
2465     _methods->ushort_at_put(_index, method->orig_method_idnum());
2466     _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2467 
2468     // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2469     // klass owning the symbols alive so their refcounts aren't decremented.
2470     Symbol* name = method->name();
2471     _names->symbol_at_put(_index, name);
2472 
2473     // We need to save the mirrors in the backtrace to keep the class
2474     // from being unloaded while we still have this stack trace.
2475     assert(method->method_holder()->java_mirror() != nullptr, "never push null for mirror");
2476     _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2477 
2478     _index++;
2479   }
2480 
2481   void set_has_hidden_top_frame() {
2482     if (!_has_hidden_top_frame) {
2483       // It would be nice to add java/lang/Boolean::TRUE here
2484       // to indicate that this backtrace has a hidden top frame.
2485       // But this code is used before TRUE is allocated.
2486       // Therefore let's just use an arbitrary legal oop
2487       // available right here. _methods is a short[].
2488       assert(_methods != nullptr, "we need a legal oop");
2489       _has_hidden_top_frame = true;
2490       _head->obj_at_put(trace_hidden_offset, _methods);
2491     }
2492   }
2493 };
2494 
2495 struct BacktraceElement : public StackObj {
2496   int _method_id;
2497   int _bci;
2498   int _version;
2499   Symbol* _name;
2500   Handle _mirror;
2501   BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2502                    _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2503 };
2504 
2505 class BacktraceIterator : public StackObj {
2506   int _index;
2507   objArrayHandle  _result;
2508   objArrayHandle  _mirrors;
2509   typeArrayHandle _methods;
2510   typeArrayHandle _bcis;
2511   typeArrayHandle _names;
2512 
2513   void init(objArrayHandle result, Thread* thread) {
2514     // Get method id, bci, version and mirror from chunk
2515     _result = result;
2516     if (_result.not_null()) {
2517       _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2518       _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2519       _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2520       _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2521       _index = 0;
2522     }
2523   }
2524  public:
2525   BacktraceIterator(objArrayHandle result, Thread* thread) {
2526     init(result, thread);
2527     assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2528   }
2529 
2530   BacktraceElement next(Thread* thread) {
2531     BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2532                         _methods->ushort_at(_index),
2533                         Backtrace::version_at(_bcis->int_at(_index)),
2534                         Backtrace::bci_at(_bcis->int_at(_index)),
2535                         _names->symbol_at(_index));
2536     _index++;
2537 
2538     if (_index >= java_lang_Throwable::trace_chunk_size) {
2539       int next_offset = java_lang_Throwable::trace_next_offset;
2540       // Get next chunk
2541       objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2542       init(result, thread);
2543     }
2544     return e;
2545   }
2546 
2547   bool repeat() {
2548     return _result.not_null() && _mirrors->obj_at(_index) != nullptr;
2549   }
2550 };
2551 
2552 
2553 // Print stack trace element to resource allocated buffer
2554 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2555                                           int version, int bci, Symbol* name) {
2556   ResourceMark rm;
2557 
2558   // Get strings and string lengths
2559   InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2560   const char* klass_name  = holder->external_name();
2561   int buf_len = (int)strlen(klass_name);
2562 
2563   char* method_name = name->as_C_string();
2564   buf_len += (int)strlen(method_name);
2565 
2566   char* source_file_name = nullptr;
2567   Symbol* source = Backtrace::get_source_file_name(holder, version);
2568   if (source != nullptr) {
2569     source_file_name = source->as_C_string();
2570     buf_len += (int)strlen(source_file_name);
2571   }
2572 
2573   char *module_name = nullptr, *module_version = nullptr;
2574   ModuleEntry* module = holder->module();
2575   if (module->is_named()) {
2576     module_name = module->name()->as_C_string();
2577     buf_len += (int)strlen(module_name);
2578     if (module->version() != nullptr) {
2579       module_version = module->version()->as_C_string();
2580       buf_len += (int)strlen(module_version);
2581     }
2582   }
2583 
2584   // Allocate temporary buffer with extra space for formatting and line number
2585   const size_t buf_size = buf_len + 64;
2586   char* buf = NEW_RESOURCE_ARRAY(char, buf_size);
2587 
2588   // Print stack trace line in buffer
2589   size_t buf_off = os::snprintf_checked(buf, buf_size, "\tat %s.%s(", klass_name, method_name);
2590 
2591   // Print module information
2592   if (module_name != nullptr) {
2593     if (module_version != nullptr) {
2594       buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s@%s/", module_name, module_version);
2595     } else {
2596       buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s/", module_name);
2597     }
2598   }
2599 
2600   // The method can be null if the requested class version is gone
2601   Method* method = holder->method_with_orig_idnum(method_id, version);
2602   if (!version_matches(method, version)) {
2603     strcat(buf, "Redefined)");
2604   } else {
2605     int line_number = Backtrace::get_line_number(method, bci);
2606     if (line_number == -2) {
2607       strcat(buf, "Native Method)");
2608     } else {
2609       if (source_file_name != nullptr && (line_number != -1)) {
2610         // Sourcename and linenumber
2611         buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s:%d)", source_file_name, line_number);
2612       } else if (source_file_name != nullptr) {
2613         // Just sourcename
2614         buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s)", source_file_name);
2615       } else {
2616         // Neither sourcename nor linenumber
2617         buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "Unknown Source)");
2618       }
2619       nmethod* nm = method->code();
2620       if (WizardMode && nm != nullptr) {
2621         os::snprintf_checked(buf + buf_off, buf_size - buf_off, "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
2622       }
2623     }
2624   }
2625 
2626   st->print_cr("%s", buf);
2627 }
2628 
2629 void java_lang_Throwable::print_stack_element(outputStream *st, Method* method, int bci) {
2630   Handle mirror (Thread::current(),  method->method_holder()->java_mirror());
2631   int method_id = method->orig_method_idnum();
2632   int version = method->constants()->version();
2633   print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2634 }
2635 
2636 /**
2637  * Print the throwable message and its stack trace plus all causes by walking the
2638  * cause chain.  The output looks the same as of Throwable.printStackTrace().
2639  */
2640 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2641   // First, print the message.
2642   print(throwable(), st);
2643   st->cr();
2644 
2645   // Now print the stack trace.
2646   JavaThread* THREAD = JavaThread::current(); // For exception macros.
2647   while (throwable.not_null()) {
2648     objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2649     if (result.is_null()) {
2650       st->print_raw_cr("\t<<no stack trace available>>");
2651       return;
2652     }
2653     BacktraceIterator iter(result, THREAD);
2654 
2655     while (iter.repeat()) {
2656       BacktraceElement bte = iter.next(THREAD);
2657       print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2658     }
2659     if (THREAD->can_call_java()) {
2660       // Call getCause() which doesn't necessarily return the _cause field.
2661       ExceptionMark em(THREAD);
2662       JavaValue cause(T_OBJECT);
2663       JavaCalls::call_virtual(&cause,
2664                               throwable,
2665                               throwable->klass(),
2666                               vmSymbols::getCause_name(),
2667                               vmSymbols::void_throwable_signature(),
2668                               THREAD);
2669       // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2670       if (HAS_PENDING_EXCEPTION) {
2671         CLEAR_PENDING_EXCEPTION;
2672         throwable = Handle();
2673       } else {
2674         throwable = Handle(THREAD, cause.get_oop());
2675         if (throwable.not_null()) {
2676           st->print("Caused by: ");
2677           print(throwable(), st);
2678           st->cr();
2679         }
2680       }
2681     } else {
2682       st->print_raw_cr("<<cannot call Java to get cause>>");
2683       return;
2684     }
2685   }
2686 }
2687 
2688 /**
2689  * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2690  */
2691 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2692   assert(throwable->is_a(vmClasses::Throwable_klass()), "Throwable instance expected");
2693   JavaValue result(T_VOID);
2694   JavaCalls::call_virtual(&result,
2695                           throwable,
2696                           vmClasses::Throwable_klass(),
2697                           vmSymbols::printStackTrace_name(),
2698                           vmSymbols::void_method_signature(),
2699                           THREAD);
2700 }
2701 
2702 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2703   if (!StackTraceInThrowable) return;
2704   ResourceMark rm(THREAD);
2705 
2706   // Start out by clearing the backtrace for this object, in case the VM
2707   // runs out of memory while allocating the stack trace
2708   set_backtrace(throwable(), nullptr);
2709   // Clear lazily constructed Java level stacktrace if refilling occurs
2710   // This is unnecessary in 1.7+ but harmless
2711   clear_stacktrace(throwable());
2712 
2713   int max_depth = MaxJavaStackTraceDepth;
2714   JavaThread* thread = THREAD;
2715 
2716   BacktraceBuilder bt(CHECK);
2717 
2718   // If there is no Java frame just return the method that was being called
2719   // with bci 0
2720   if (!thread->has_last_Java_frame()) {
2721     if (max_depth >= 1 && method() != nullptr) {
2722       bt.push(method(), 0, CHECK);
2723       log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2724       set_depth(throwable(), 1);
2725       set_backtrace(throwable(), bt.backtrace());
2726     }
2727     return;
2728   }
2729 
2730   // Instead of using vframe directly, this version of fill_in_stack_trace
2731   // basically handles everything by hand. This significantly improved the
2732   // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2733   // See bug 6333838 for  more details.
2734   // The "ASSERT" here is to verify this method generates the exactly same stack
2735   // trace as utilizing vframe.
2736 #ifdef ASSERT
2737   vframeStream st(thread, false /* stop_at_java_call_stub */, false /* process_frames */);
2738 #endif
2739   int total_count = 0;
2740   RegisterMap map(thread,
2741                   RegisterMap::UpdateMap::skip,
2742                   RegisterMap::ProcessFrames::skip,
2743                   RegisterMap::WalkContinuation::include);
2744   int decode_offset = 0;
2745   nmethod* nm = nullptr;
2746   bool skip_fillInStackTrace_check = false;
2747   bool skip_throwableInit_check = false;
2748   bool skip_hidden = !ShowHiddenFrames;
2749   bool show_carrier = ShowCarrierFrames;
2750   ContinuationEntry* cont_entry = thread->last_continuation();
2751   for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2752     Method* method = nullptr;
2753     int bci = 0;
2754 
2755     // Compiled java method case.
2756     if (decode_offset != 0) {
2757       DebugInfoReadStream stream(nm, decode_offset);
2758       decode_offset = stream.read_int();
2759       method = (Method*)nm->metadata_at(stream.read_int());
2760       bci = stream.read_bci();
2761     } else {
2762       if (fr.is_first_frame()) break;
2763 
2764       if (Continuation::is_continuation_enterSpecial(fr)) {
2765         assert(cont_entry == Continuation::get_continuation_entry_for_entry_frame(thread, fr), "");
2766         if (!show_carrier && cont_entry->is_virtual_thread()) {
2767           break;
2768         }
2769         cont_entry = cont_entry->parent();
2770       }
2771 
2772       address pc = fr.pc();
2773       if (fr.is_interpreted_frame()) {
2774         address bcp;
2775         if (!map.in_cont()) {
2776           bcp = fr.interpreter_frame_bcp();
2777           method = fr.interpreter_frame_method();
2778         } else {
2779           bcp = map.stack_chunk()->interpreter_frame_bcp(fr);
2780           method = map.stack_chunk()->interpreter_frame_method(fr);
2781         }
2782         bci =  method->bci_from(bcp);
2783         fr = fr.sender(&map);
2784       } else {
2785         CodeBlob* cb = fr.cb();
2786         // HMMM QQQ might be nice to have frame return nm as null if cb is non-null
2787         // but non nmethod
2788         fr = fr.sender(&map);
2789         if (cb == nullptr || !cb->is_nmethod()) {
2790           continue;
2791         }
2792         nm = cb->as_nmethod();
2793         assert(nm->method() != nullptr, "must be");
2794         if (nm->method()->is_native()) {
2795           method = nm->method();
2796           bci = 0;
2797         } else {
2798           PcDesc* pd = nm->pc_desc_at(pc);
2799           decode_offset = pd->scope_decode_offset();
2800           // if decode_offset is not equal to 0, it will execute the
2801           // "compiled java method case" at the beginning of the loop.
2802           continue;
2803         }
2804       }
2805     }
2806 #ifdef ASSERT
2807     if (!st.at_end()) { // TODO LOOM remove once we show only vthread trace
2808       assert(st.method() == method && st.bci() == bci, "Wrong stack trace");
2809       st.next();
2810     }
2811 #endif
2812 
2813     // the format of the stacktrace will be:
2814     // - 1 or more fillInStackTrace frames for the exception class (skipped)
2815     // - 0 or more <init> methods for the exception class (skipped)
2816     // - rest of the stack
2817 
2818     if (!skip_fillInStackTrace_check) {
2819       if (method->name() == vmSymbols::fillInStackTrace_name() &&
2820           throwable->is_a(method->method_holder())) {
2821         continue;
2822       }
2823       else {
2824         skip_fillInStackTrace_check = true; // gone past them all
2825       }
2826     }
2827     if (!skip_throwableInit_check) {
2828       assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2829 
2830       // skip <init> methods of the exception class and superclasses
2831       // This is similar to classic VM.
2832       if (method->is_object_constructor() &&
2833           throwable->is_a(method->method_holder())) {
2834         continue;
2835       } else {
2836         // there are none or we've seen them all - either way stop checking
2837         skip_throwableInit_check = true;
2838       }
2839     }
2840     if (method->is_hidden() || method->is_continuation_enter_intrinsic()) {
2841       if (skip_hidden) {
2842         if (total_count == 0) {
2843           // The top frame will be hidden from the stack trace.
2844           bt.set_has_hidden_top_frame();
2845         }
2846         continue;
2847       }
2848     }
2849 
2850     bt.push(method, bci, CHECK);
2851     total_count++;
2852   }
2853 
2854   log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2855 
2856   // Put completed stack trace into throwable object
2857   set_backtrace(throwable(), bt.backtrace());
2858   set_depth(throwable(), total_count);
2859 }
2860 
2861 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2862   // No-op if stack trace is disabled
2863   if (!StackTraceInThrowable) {
2864     return;
2865   }
2866 
2867   // Disable stack traces for some preallocated out of memory errors
2868   if (!Universe::should_fill_in_stack_trace(throwable)) {
2869     return;
2870   }
2871 
2872   JavaThread* THREAD = JavaThread::current(); // For exception macros.
2873   PreserveExceptionMark pm(THREAD);
2874 
2875   fill_in_stack_trace(throwable, method, THREAD);
2876   // Ignore exceptions thrown during stack trace filling (OOM) and reinstall the
2877   // original exception via the PreserveExceptionMark destructor.
2878   CLEAR_PENDING_EXCEPTION;
2879 }
2880 
2881 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2882   // Allocate stack trace - backtrace is created but not filled in
2883 
2884   // No-op if stack trace is disabled
2885   if (!StackTraceInThrowable) return;
2886   BacktraceBuilder bt(CHECK);   // creates a backtrace
2887   set_backtrace(throwable(), bt.backtrace());
2888 }
2889 
2890 
2891 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2892   // Fill in stack trace into preallocated backtrace (no GC)
2893 
2894   // No-op if stack trace is disabled
2895   if (!StackTraceInThrowable) return;
2896 
2897   assert(throwable->is_a(vmClasses::Throwable_klass()), "sanity check");
2898 
2899   JavaThread* THREAD = JavaThread::current(); // For exception macros.
2900 
2901   objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2902   assert(backtrace.not_null(), "backtrace should have been preallocated");
2903 
2904   ResourceMark rm(THREAD);
2905   vframeStream st(THREAD, false /* stop_at_java_call_stub */, false /* process_frames */);
2906 
2907   BacktraceBuilder bt(THREAD, backtrace);
2908 
2909   // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2910   // methods as preallocated errors aren't created by "java" code.
2911 
2912   // fill in as much stack trace as possible
2913   int chunk_count = 0;
2914   for (;!st.at_end(); st.next()) {
2915     bt.push(st.method(), st.bci(), CHECK);
2916     chunk_count++;
2917 
2918     // Bail-out for deep stacks
2919     if (chunk_count >= trace_chunk_size) break;
2920   }
2921   set_depth(throwable(), chunk_count);
2922   log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2923 
2924   // We support the Throwable immutability protocol defined for Java 7.
2925   java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2926   assert(java_lang_Throwable::unassigned_stacktrace() != nullptr, "not initialized");
2927 }
2928 
2929 void java_lang_Throwable::get_stack_trace_elements(int depth, Handle backtrace,
2930                                                    objArrayHandle stack_trace_array_h, TRAPS) {
2931 
2932   if (backtrace.is_null() || stack_trace_array_h.is_null()) {
2933     THROW(vmSymbols::java_lang_NullPointerException());
2934   }
2935 
2936   assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2937 
2938   if (stack_trace_array_h->length() != depth) {
2939     THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2940   }
2941 
2942   objArrayHandle result(THREAD, objArrayOop(backtrace()));
2943   BacktraceIterator iter(result, THREAD);
2944 
2945   int index = 0;
2946   while (iter.repeat()) {
2947     BacktraceElement bte = iter.next(THREAD);
2948 
2949     Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2950 
2951     if (stack_trace_element.is_null()) {
2952       THROW(vmSymbols::java_lang_NullPointerException());
2953     }
2954 
2955     InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2956     methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2957 
2958     java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2959                                          method,
2960                                          bte._version,
2961                                          bte._bci,
2962                                          bte._name,
2963                                          CHECK);
2964   }
2965 }
2966 
2967 Handle java_lang_Throwable::create_initialization_error(JavaThread* current, Handle throwable) {
2968   // Creates an ExceptionInInitializerError to be recorded as the initialization error when class initialization
2969   // failed due to the passed in 'throwable'. We cannot save 'throwable' directly due to issues with keeping alive
2970   // all objects referenced via its stacktrace. So instead we save a new EIIE instance, with the same message and
2971   // symbolic stacktrace of 'throwable'.
2972   assert(throwable.not_null(), "shouldn't be");
2973 
2974   // Now create the message from the original exception and thread name.
2975   ResourceMark rm(current);
2976   const char *message = nullptr;
2977   oop detailed_message = java_lang_Throwable::message(throwable());
2978   if (detailed_message != nullptr) {
2979     message = java_lang_String::as_utf8_string(detailed_message);
2980   }
2981   stringStream st;
2982   st.print("Exception %s%s ", throwable()->klass()->name()->as_klass_external_name(),
2983              message == nullptr ? "" : ":");
2984   if (message == nullptr) {
2985     st.print("[in thread \"%s\"]", current->name());
2986   } else {
2987     st.print("%s [in thread \"%s\"]", message, current->name());
2988   }
2989 
2990   Symbol* exception_name = vmSymbols::java_lang_ExceptionInInitializerError();
2991   Handle init_error = Exceptions::new_exception(current, exception_name, st.as_string());
2992   // If new_exception returns a different exception while creating the exception,
2993   // abandon the attempt to save the initialization error and return null.
2994   if (init_error->klass()->name() != exception_name) {
2995     log_info(class, init)("Exception %s thrown while saving initialization exception",
2996                         init_error->klass()->external_name());
2997     return Handle();
2998   }
2999 
3000   // Call to java to fill in the stack trace and clear declaringClassObject to
3001   // not keep classes alive in the stack trace.
3002   // call this:  public StackTraceElement[] getStackTrace()
3003   JavaValue result(T_ARRAY);
3004   JavaCalls::call_virtual(&result, throwable,
3005                           vmClasses::Throwable_klass(),
3006                           vmSymbols::getStackTrace_name(),
3007                           vmSymbols::getStackTrace_signature(),
3008                           current);
3009   if (!current->has_pending_exception()){
3010     Handle stack_trace(current, result.get_oop());
3011     assert(stack_trace->is_objArray(), "Should be an array");
3012     java_lang_Throwable::set_stacktrace(init_error(), stack_trace());
3013     // Clear backtrace because the stacktrace should be used instead.
3014     set_backtrace(init_error(), nullptr);
3015   } else {
3016     log_info(class, init)("Exception thrown while getting stack trace for initialization exception %s",
3017                         init_error->klass()->external_name());
3018     current->clear_pending_exception();
3019   }
3020 
3021   return init_error;
3022 }
3023 
3024 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) {
3025   JavaThread* current = JavaThread::current();
3026   objArrayHandle result(current, objArrayOop(backtrace(throwable)));
3027   BacktraceIterator iter(result, current);
3028   // No backtrace available.
3029   if (!iter.repeat()) return false;
3030 
3031   // If the exception happened in a frame that has been hidden, i.e.,
3032   // omitted from the back trace, we can not compute the message.
3033   oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset);
3034   if (hidden != nullptr) {
3035     return false;
3036   }
3037 
3038   // Get first backtrace element.
3039   BacktraceElement bte = iter.next(current);
3040 
3041   InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
3042   assert(holder != nullptr, "first element should be non-null");
3043   Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version);
3044 
3045   // Original version is no longer available.
3046   if (m == nullptr || !version_matches(m, bte._version)) {
3047     return false;
3048   }
3049 
3050   *method = m;
3051   *bci = bte._bci;
3052   return true;
3053 }
3054 
3055 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
3056   // Allocate java.lang.StackTraceElement instance
3057   InstanceKlass* k = vmClasses::StackTraceElement_klass();
3058   assert(k != nullptr, "must be loaded in 1.4+");
3059   if (k->should_be_initialized()) {
3060     k->initialize(CHECK_NULL);
3061   }
3062 
3063   Handle element = k->allocate_instance_handle(CHECK_NULL);
3064 
3065   int version = method->constants()->version();
3066   fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_NULL);
3067   return element();
3068 }
3069 
3070 void java_lang_StackTraceElement::fill_in(Handle element,
3071                                           InstanceKlass* holder, const methodHandle& method,
3072                                           int version, int bci, Symbol* name, TRAPS) {
3073   assert(element->is_a(vmClasses::StackTraceElement_klass()), "sanity check");
3074 
3075   ResourceMark rm(THREAD);
3076   HandleMark hm(THREAD);
3077 
3078   // Fill in class name
3079   Handle java_class(THREAD, holder->java_mirror());
3080   oop classname = java_lang_Class::name(java_class, CHECK);
3081   java_lang_StackTraceElement::set_declaringClass(element(), classname);
3082   java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
3083 
3084   oop loader = holder->class_loader();
3085   if (loader != nullptr) {
3086     oop loader_name = java_lang_ClassLoader::name(loader);
3087     if (loader_name != nullptr)
3088       java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
3089   }
3090 
3091   // Fill in method name
3092   oop methodname = StringTable::intern(name, CHECK);
3093   java_lang_StackTraceElement::set_methodName(element(), methodname);
3094 
3095   // Fill in module name and version
3096   ModuleEntry* module = holder->module();
3097   if (module->is_named()) {
3098     oop module_name = StringTable::intern(module->name(), CHECK);
3099     java_lang_StackTraceElement::set_moduleName(element(), module_name);
3100     oop module_version;
3101     if (module->version() != nullptr) {
3102       module_version = StringTable::intern(module->version(), CHECK);
3103     } else {
3104       module_version = nullptr;
3105     }
3106     java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
3107   }
3108 
3109   if (method() == nullptr || !version_matches(method(), version)) {
3110     // The method was redefined, accurate line number information isn't available
3111     java_lang_StackTraceElement::set_fileName(element(), nullptr);
3112     java_lang_StackTraceElement::set_lineNumber(element(), -1);
3113   } else {
3114     Symbol* source;
3115     oop source_file;
3116     int line_number;
3117     decode_file_and_line(java_class, holder, version, method, bci, source, source_file, line_number, CHECK);
3118 
3119     java_lang_StackTraceElement::set_fileName(element(), source_file);
3120     java_lang_StackTraceElement::set_lineNumber(element(), line_number);
3121   }
3122 }
3123 
3124 void java_lang_StackTraceElement::decode_file_and_line(Handle java_class,
3125                                                        InstanceKlass* holder,
3126                                                        int version,
3127                                                        const methodHandle& method,
3128                                                        int bci,
3129                                                        Symbol*& source,
3130                                                        oop& source_file,
3131                                                        int& line_number, TRAPS) {
3132   // Fill in source file name and line number.
3133   source = Backtrace::get_source_file_name(holder, version);
3134   source_file = java_lang_Class::source_file(java_class());
3135   if (source != nullptr) {
3136     // Class was not redefined. We can trust its cache if set,
3137     // else we have to initialize it.
3138     if (source_file == nullptr) {
3139       source_file = StringTable::intern(source, CHECK);
3140       java_lang_Class::set_source_file(java_class(), source_file);
3141     }
3142   } else {
3143     // Class was redefined. Dump the cache if it was set.
3144     if (source_file != nullptr) {
3145       source_file = nullptr;
3146       java_lang_Class::set_source_file(java_class(), source_file);
3147     }
3148   }
3149   line_number = Backtrace::get_line_number(method(), bci);
3150 }
3151 
3152 #if INCLUDE_JVMCI
3153 void java_lang_StackTraceElement::decode(const methodHandle& method, int bci,
3154                                          Symbol*& filename, int& line_number, TRAPS) {
3155   ResourceMark rm(THREAD);
3156   HandleMark hm(THREAD);
3157 
3158   filename = nullptr;
3159   line_number = -1;
3160 
3161   oop source_file;
3162   int version = method->constants()->version();
3163   InstanceKlass* holder = method->method_holder();
3164   Handle java_class(THREAD, holder->java_mirror());
3165   decode_file_and_line(java_class, holder, version, method, bci, filename, source_file, line_number, CHECK);
3166 }
3167 #endif // INCLUDE_JVMCI
3168 
3169 // java_lang_ClassFrameInfo
3170 
3171 int java_lang_ClassFrameInfo::_classOrMemberName_offset;
3172 int java_lang_ClassFrameInfo::_flags_offset;
3173 
3174 #define CLASSFRAMEINFO_FIELDS_DO(macro) \
3175   macro(_classOrMemberName_offset, k, "classOrMemberName", object_signature,  false); \
3176   macro(_flags_offset,             k, vmSymbols::flags_name(), int_signature, false)
3177 
3178 void java_lang_ClassFrameInfo::compute_offsets() {
3179   InstanceKlass* k = vmClasses::ClassFrameInfo_klass();
3180   CLASSFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3181 }
3182 
3183 #if INCLUDE_CDS
3184 void java_lang_ClassFrameInfo::serialize_offsets(SerializeClosure* f) {
3185   CLASSFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3186 }
3187 #endif
3188 
3189 static int get_flags(const methodHandle& m) {
3190   int flags = m->access_flags().as_method_flags();
3191   if (m->is_object_constructor()) {
3192     flags |= java_lang_invoke_MemberName::MN_IS_OBJECT_CONSTRUCTOR;
3193   } else {
3194     // Note: Static initializers can be here. Record them as plain methods.
3195     flags |= java_lang_invoke_MemberName::MN_IS_METHOD;
3196   }
3197   if (m->caller_sensitive()) {
3198     flags |= java_lang_invoke_MemberName::MN_CALLER_SENSITIVE;
3199   }
3200   if (m->is_hidden()) {
3201     flags |= java_lang_invoke_MemberName::MN_HIDDEN_MEMBER;
3202   }
3203   assert((flags & 0xFF000000) == 0, "unexpected flags");
3204   return flags;
3205 }
3206 
3207 oop java_lang_ClassFrameInfo::classOrMemberName(oop obj) {
3208   return obj->obj_field(_classOrMemberName_offset);
3209 }
3210 
3211 int java_lang_ClassFrameInfo::flags(oop obj) {
3212   return obj->int_field(_flags_offset);
3213 }
3214 
3215 void java_lang_ClassFrameInfo::init_class(Handle stackFrame, const methodHandle& m) {
3216   stackFrame->obj_field_put(_classOrMemberName_offset, m->method_holder()->java_mirror());
3217   // flags is initialized when ClassFrameInfo object is constructed and retain the value
3218   int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3219   stackFrame->int_field_put(_flags_offset, flags);
3220 }
3221 
3222 void java_lang_ClassFrameInfo::init_method(Handle stackFrame, const methodHandle& m, TRAPS) {
3223   oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(m, CHECK);
3224   stackFrame->obj_field_put(_classOrMemberName_offset, rmethod_name);
3225   // flags is initialized when ClassFrameInfo object is constructed and retain the value
3226   int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3227   stackFrame->int_field_put(_flags_offset, flags);
3228 }
3229 
3230 
3231 // java_lang_StackFrameInfo
3232 
3233 int java_lang_StackFrameInfo::_type_offset;
3234 int java_lang_StackFrameInfo::_name_offset;
3235 int java_lang_StackFrameInfo::_bci_offset;
3236 int java_lang_StackFrameInfo::_version_offset;
3237 int java_lang_StackFrameInfo::_contScope_offset;
3238 
3239 #define STACKFRAMEINFO_FIELDS_DO(macro) \
3240   macro(_type_offset,       k, "type",       object_signature,            false); \
3241   macro(_name_offset,       k, "name",       string_signature,            false); \
3242   macro(_bci_offset,        k, "bci",        int_signature,               false); \
3243   macro(_contScope_offset,  k, "contScope",  continuationscope_signature, false)
3244 
3245 void java_lang_StackFrameInfo::compute_offsets() {
3246   InstanceKlass* k = vmClasses::StackFrameInfo_klass();
3247   STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3248   STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3249 }
3250 
3251 #if INCLUDE_CDS
3252 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
3253   STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3254   STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3255 }
3256 #endif
3257 
3258 Method* java_lang_StackFrameInfo::get_method(oop obj) {
3259   oop m = java_lang_ClassFrameInfo::classOrMemberName(obj);
3260   Method* method = java_lang_invoke_ResolvedMethodName::vmtarget(m);
3261   return method;
3262 }
3263 
3264 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS) {
3265   // set Method* or mid/cpref
3266   HandleMark hm(THREAD);
3267   Handle cont_h(THREAD, cont);
3268   java_lang_ClassFrameInfo::init_method(stackFrame, method, CHECK);
3269 
3270   // set bci
3271   java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
3272   // method may be redefined; store the version
3273   int version = method->constants()->version();
3274   assert((jushort)version == version, "version should be short");
3275   java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
3276 
3277   oop contScope = cont_h() != nullptr ? jdk_internal_vm_Continuation::scope(cont_h()) : (oop)nullptr;
3278   java_lang_StackFrameInfo::set_contScope(stackFrame(), contScope);
3279 }
3280 
3281 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
3282   ResourceMark rm(THREAD);
3283   HandleMark hm(THREAD);
3284 
3285   Method* method = java_lang_StackFrameInfo::get_method(stackFrame());
3286   InstanceKlass* holder = method->method_holder();
3287   short version = stackFrame->short_field(_version_offset);
3288   int bci = stackFrame->int_field(_bci_offset);
3289   Symbol* name = method->name();
3290   java_lang_StackTraceElement::fill_in(stack_trace_element, holder, methodHandle(THREAD, method), version, bci, name, CHECK);
3291 }
3292 
3293 oop java_lang_StackFrameInfo::type(oop obj) {
3294   return obj->obj_field(_type_offset);
3295 }
3296 
3297 void java_lang_StackFrameInfo::set_type(oop obj, oop value) {
3298   obj->obj_field_put(_type_offset, value);
3299 }
3300 
3301 oop java_lang_StackFrameInfo::name(oop obj) {
3302   return obj->obj_field(_name_offset);
3303 }
3304 
3305 void java_lang_StackFrameInfo::set_name(oop obj, oop value) {
3306   obj->obj_field_put(_name_offset, value);
3307 }
3308 
3309 void java_lang_StackFrameInfo::set_version(oop obj, short value) {
3310   obj->short_field_put(_version_offset, value);
3311 }
3312 
3313 void java_lang_StackFrameInfo::set_bci(oop obj, int value) {
3314   assert(value >= 0 && value < max_jushort, "must be a valid bci value");
3315   obj->int_field_put(_bci_offset, value);
3316 }
3317 
3318 void java_lang_StackFrameInfo::set_contScope(oop obj, oop value) {
3319   obj->obj_field_put(_contScope_offset, value);
3320 }
3321 
3322 int java_lang_LiveStackFrameInfo::_monitors_offset;
3323 int java_lang_LiveStackFrameInfo::_locals_offset;
3324 int java_lang_LiveStackFrameInfo::_operands_offset;
3325 int java_lang_LiveStackFrameInfo::_mode_offset;
3326 
3327 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
3328   macro(_monitors_offset,   k, "monitors",    object_array_signature, false); \
3329   macro(_locals_offset,     k, "locals",      object_array_signature, false); \
3330   macro(_operands_offset,   k, "operands",    object_array_signature, false); \
3331   macro(_mode_offset,       k, "mode",        int_signature,          false)
3332 
3333 void java_lang_LiveStackFrameInfo::compute_offsets() {
3334   InstanceKlass* k = vmClasses::LiveStackFrameInfo_klass();
3335   LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3336 }
3337 
3338 #if INCLUDE_CDS
3339 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
3340   LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3341 }
3342 #endif
3343 
3344 void java_lang_LiveStackFrameInfo::set_monitors(oop obj, oop value) {
3345   obj->obj_field_put(_monitors_offset, value);
3346 }
3347 
3348 void java_lang_LiveStackFrameInfo::set_locals(oop obj, oop value) {
3349   obj->obj_field_put(_locals_offset, value);
3350 }
3351 
3352 void java_lang_LiveStackFrameInfo::set_operands(oop obj, oop value) {
3353   obj->obj_field_put(_operands_offset, value);
3354 }
3355 
3356 void java_lang_LiveStackFrameInfo::set_mode(oop obj, int value) {
3357   obj->int_field_put(_mode_offset, value);
3358 }
3359 
3360 
3361 // java_lang_AccessibleObject
3362 
3363 int java_lang_reflect_AccessibleObject::_override_offset;
3364 
3365 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
3366   macro(_override_offset, k, "override", bool_signature, false)
3367 
3368 void java_lang_reflect_AccessibleObject::compute_offsets() {
3369   InstanceKlass* k = vmClasses::reflect_AccessibleObject_klass();
3370   ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3371 }
3372 
3373 #if INCLUDE_CDS
3374 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
3375   ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3376 }
3377 #endif
3378 
3379 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
3380   return (jboolean) reflect->bool_field(_override_offset);
3381 }
3382 
3383 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
3384   reflect->bool_field_put(_override_offset, (int) value);
3385 }
3386 
3387 // java_lang_reflect_Method
3388 
3389 int java_lang_reflect_Method::_clazz_offset;
3390 int java_lang_reflect_Method::_name_offset;
3391 int java_lang_reflect_Method::_returnType_offset;
3392 int java_lang_reflect_Method::_parameterTypes_offset;
3393 int java_lang_reflect_Method::_exceptionTypes_offset;
3394 int java_lang_reflect_Method::_slot_offset;
3395 int java_lang_reflect_Method::_modifiers_offset;
3396 int java_lang_reflect_Method::_signature_offset;
3397 int java_lang_reflect_Method::_annotations_offset;
3398 int java_lang_reflect_Method::_parameter_annotations_offset;
3399 int java_lang_reflect_Method::_annotation_default_offset;
3400 
3401 #define METHOD_FIELDS_DO(macro) \
3402   macro(_clazz_offset,          k, vmSymbols::clazz_name(),          class_signature,       false); \
3403   macro(_name_offset,           k, vmSymbols::name_name(),           string_signature,      false); \
3404   macro(_returnType_offset,     k, vmSymbols::returnType_name(),     class_signature,       false); \
3405   macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3406   macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3407   macro(_slot_offset,           k, vmSymbols::slot_name(),           int_signature,         false); \
3408   macro(_modifiers_offset,      k, vmSymbols::modifiers_name(),      int_signature,         false); \
3409   macro(_signature_offset,             k, vmSymbols::signature_name(),             string_signature,     false); \
3410   macro(_annotations_offset,           k, vmSymbols::annotations_name(),           byte_array_signature, false); \
3411   macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
3412   macro(_annotation_default_offset,    k, vmSymbols::annotation_default_name(),    byte_array_signature, false);
3413 
3414 void java_lang_reflect_Method::compute_offsets() {
3415   InstanceKlass* k = vmClasses::reflect_Method_klass();
3416   METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3417 }
3418 
3419 #if INCLUDE_CDS
3420 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
3421   METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3422 }
3423 #endif
3424 
3425 Handle java_lang_reflect_Method::create(TRAPS) {
3426   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3427   Klass* klass = vmClasses::reflect_Method_klass();
3428   // This class is eagerly initialized during VM initialization, since we keep a reference
3429   // to one of the methods
3430   assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
3431   return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
3432 }
3433 
3434 oop java_lang_reflect_Method::clazz(oop reflect) {
3435   return reflect->obj_field(_clazz_offset);
3436 }
3437 
3438 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
3439    reflect->obj_field_put(_clazz_offset, value);
3440 }
3441 
3442 int java_lang_reflect_Method::slot(oop reflect) {
3443   return reflect->int_field(_slot_offset);
3444 }
3445 
3446 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
3447   reflect->int_field_put(_slot_offset, value);
3448 }
3449 
3450 void java_lang_reflect_Method::set_name(oop method, oop value) {
3451   method->obj_field_put(_name_offset, value);
3452 }
3453 
3454 oop java_lang_reflect_Method::return_type(oop method) {
3455   return method->obj_field(_returnType_offset);
3456 }
3457 
3458 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
3459   method->obj_field_put(_returnType_offset, value);
3460 }
3461 
3462 oop java_lang_reflect_Method::parameter_types(oop method) {
3463   return method->obj_field(_parameterTypes_offset);
3464 }
3465 
3466 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
3467   method->obj_field_put(_parameterTypes_offset, value);
3468 }
3469 
3470 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
3471   method->obj_field_put(_exceptionTypes_offset, value);
3472 }
3473 
3474 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
3475   method->int_field_put(_modifiers_offset, value);
3476 }
3477 
3478 void java_lang_reflect_Method::set_signature(oop method, oop value) {
3479   method->obj_field_put(_signature_offset, value);
3480 }
3481 
3482 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
3483   method->obj_field_put(_annotations_offset, value);
3484 }
3485 
3486 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
3487   method->obj_field_put(_parameter_annotations_offset, value);
3488 }
3489 
3490 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
3491   method->obj_field_put(_annotation_default_offset, value);
3492 }
3493 
3494 int java_lang_reflect_Constructor::_clazz_offset;
3495 int java_lang_reflect_Constructor::_parameterTypes_offset;
3496 int java_lang_reflect_Constructor::_exceptionTypes_offset;
3497 int java_lang_reflect_Constructor::_slot_offset;
3498 int java_lang_reflect_Constructor::_modifiers_offset;
3499 int java_lang_reflect_Constructor::_signature_offset;
3500 int java_lang_reflect_Constructor::_annotations_offset;
3501 int java_lang_reflect_Constructor::_parameter_annotations_offset;
3502 
3503 #define CONSTRUCTOR_FIELDS_DO(macro) \
3504   macro(_clazz_offset,          k, vmSymbols::clazz_name(),          class_signature,       false); \
3505   macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3506   macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3507   macro(_slot_offset,           k, vmSymbols::slot_name(),           int_signature,         false); \
3508   macro(_modifiers_offset,      k, vmSymbols::modifiers_name(),      int_signature,         false); \
3509   macro(_signature_offset,             k, vmSymbols::signature_name(),             string_signature,     false); \
3510   macro(_annotations_offset,           k, vmSymbols::annotations_name(),           byte_array_signature, false); \
3511   macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
3512 
3513 void java_lang_reflect_Constructor::compute_offsets() {
3514   InstanceKlass* k = vmClasses::reflect_Constructor_klass();
3515   CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3516 }
3517 
3518 #if INCLUDE_CDS
3519 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
3520   CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3521 }
3522 #endif
3523 
3524 Handle java_lang_reflect_Constructor::create(TRAPS) {
3525   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3526   Symbol* name = vmSymbols::java_lang_reflect_Constructor();
3527   Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3528   InstanceKlass* ik = InstanceKlass::cast(k);
3529   // Ensure it is initialized
3530   ik->initialize(CHECK_NH);
3531   return ik->allocate_instance_handle(THREAD);
3532 }
3533 
3534 oop java_lang_reflect_Constructor::clazz(oop reflect) {
3535   return reflect->obj_field(_clazz_offset);
3536 }
3537 
3538 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
3539    reflect->obj_field_put(_clazz_offset, value);
3540 }
3541 
3542 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
3543   return constructor->obj_field(_parameterTypes_offset);
3544 }
3545 
3546 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
3547   constructor->obj_field_put(_parameterTypes_offset, value);
3548 }
3549 
3550 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
3551   constructor->obj_field_put(_exceptionTypes_offset, value);
3552 }
3553 
3554 int java_lang_reflect_Constructor::slot(oop reflect) {
3555   return reflect->int_field(_slot_offset);
3556 }
3557 
3558 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
3559   reflect->int_field_put(_slot_offset, value);
3560 }
3561 
3562 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
3563   constructor->int_field_put(_modifiers_offset, value);
3564 }
3565 
3566 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
3567   constructor->obj_field_put(_signature_offset, value);
3568 }
3569 
3570 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
3571   constructor->obj_field_put(_annotations_offset, value);
3572 }
3573 
3574 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
3575   method->obj_field_put(_parameter_annotations_offset, value);
3576 }
3577 
3578 int java_lang_reflect_Field::_clazz_offset;
3579 int java_lang_reflect_Field::_name_offset;
3580 int java_lang_reflect_Field::_type_offset;
3581 int java_lang_reflect_Field::_slot_offset;
3582 int java_lang_reflect_Field::_modifiers_offset;
3583 int java_lang_reflect_Field::_flags_offset;
3584 int java_lang_reflect_Field::_signature_offset;
3585 int java_lang_reflect_Field::_annotations_offset;
3586 
3587 #define FIELD_FIELDS_DO(macro) \
3588   macro(_clazz_offset,     k, vmSymbols::clazz_name(),     class_signature,  false); \
3589   macro(_name_offset,      k, vmSymbols::name_name(),      string_signature, false); \
3590   macro(_type_offset,      k, vmSymbols::type_name(),      class_signature,  false); \
3591   macro(_slot_offset,      k, vmSymbols::slot_name(),      int_signature,    false); \
3592   macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature,    false); \
3593   macro(_flags_offset,     k, vmSymbols::flags_name(),     int_signature,    false); \
3594   macro(_signature_offset,        k, vmSymbols::signature_name(),        string_signature,     false); \
3595   macro(_annotations_offset,      k, vmSymbols::annotations_name(),      byte_array_signature, false);
3596 
3597 void java_lang_reflect_Field::compute_offsets() {
3598   InstanceKlass* k = vmClasses::reflect_Field_klass();
3599   FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3600 }
3601 
3602 #if INCLUDE_CDS
3603 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
3604   FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3605 }
3606 #endif
3607 
3608 Handle java_lang_reflect_Field::create(TRAPS) {
3609   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3610   Symbol* name = vmSymbols::java_lang_reflect_Field();
3611   Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3612   InstanceKlass* ik = InstanceKlass::cast(k);
3613   // Ensure it is initialized
3614   ik->initialize(CHECK_NH);
3615   return ik->allocate_instance_handle(THREAD);
3616 }
3617 
3618 oop java_lang_reflect_Field::clazz(oop reflect) {
3619   return reflect->obj_field(_clazz_offset);
3620 }
3621 
3622 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
3623   reflect->obj_field_put(_clazz_offset, value);
3624 }
3625 
3626 oop java_lang_reflect_Field::name(oop field) {
3627   return field->obj_field(_name_offset);
3628 }
3629 
3630 void java_lang_reflect_Field::set_name(oop field, oop value) {
3631   field->obj_field_put(_name_offset, value);
3632 }
3633 
3634 oop java_lang_reflect_Field::type(oop field) {
3635   return field->obj_field(_type_offset);
3636 }
3637 
3638 void java_lang_reflect_Field::set_type(oop field, oop value) {
3639   field->obj_field_put(_type_offset, value);
3640 }
3641 
3642 int java_lang_reflect_Field::slot(oop reflect) {
3643   return reflect->int_field(_slot_offset);
3644 }
3645 
3646 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
3647   reflect->int_field_put(_slot_offset, value);
3648 }
3649 
3650 int java_lang_reflect_Field::modifiers(oop field) {
3651   return field->int_field(_modifiers_offset);
3652 }
3653 
3654 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
3655   field->int_field_put(_modifiers_offset, value);
3656 }
3657 
3658 void java_lang_reflect_Field::set_flags(oop field, int value) {
3659   field->int_field_put(_flags_offset, value);
3660 }
3661 
3662 void java_lang_reflect_Field::set_signature(oop field, oop value) {
3663   field->obj_field_put(_signature_offset, value);
3664 }
3665 
3666 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
3667   field->obj_field_put(_annotations_offset, value);
3668 }
3669 
3670 oop java_lang_reflect_RecordComponent::create(InstanceKlass* holder, RecordComponent* component, TRAPS) {
3671   // Allocate java.lang.reflect.RecordComponent instance
3672   HandleMark hm(THREAD);
3673   InstanceKlass* ik = vmClasses::RecordComponent_klass();
3674   assert(ik != nullptr, "must be loaded");
3675   ik->initialize(CHECK_NULL);
3676 
3677   Handle element = ik->allocate_instance_handle(CHECK_NULL);
3678 
3679   Handle decl_class(THREAD, holder->java_mirror());
3680   java_lang_reflect_RecordComponent::set_clazz(element(), decl_class());
3681 
3682   Symbol* name = holder->constants()->symbol_at(component->name_index()); // name_index is a utf8
3683   oop component_name = StringTable::intern(name, CHECK_NULL);
3684   java_lang_reflect_RecordComponent::set_name(element(), component_name);
3685 
3686   Symbol* type = holder->constants()->symbol_at(component->descriptor_index());
3687   Handle component_type_h =
3688     SystemDictionary::find_java_mirror_for_type(type, holder, SignatureStream::NCDFError, CHECK_NULL);
3689   java_lang_reflect_RecordComponent::set_type(element(), component_type_h());
3690 
3691   Method* accessor_method = nullptr;
3692   {
3693     // Prepend "()" to type to create the full method signature.
3694     ResourceMark rm(THREAD);
3695     int sig_len = type->utf8_length() + 3; // "()" and null char
3696     char* sig = NEW_RESOURCE_ARRAY(char, sig_len);
3697     jio_snprintf(sig, sig_len, "%c%c%s", JVM_SIGNATURE_FUNC, JVM_SIGNATURE_ENDFUNC, type->as_C_string());
3698     TempNewSymbol full_sig = SymbolTable::new_symbol(sig);
3699     accessor_method = holder->find_instance_method(name, full_sig, Klass::PrivateLookupMode::find);
3700   }
3701 
3702   if (accessor_method != nullptr) {
3703     methodHandle method(THREAD, accessor_method);
3704     oop m = Reflection::new_method(method, false, CHECK_NULL);
3705     java_lang_reflect_RecordComponent::set_accessor(element(), m);
3706   } else {
3707     java_lang_reflect_RecordComponent::set_accessor(element(), nullptr);
3708   }
3709 
3710   int sig_index = component->generic_signature_index();
3711   if (sig_index > 0) {
3712     Symbol* sig = holder->constants()->symbol_at(sig_index); // sig_index is a utf8
3713     oop component_sig = StringTable::intern(sig, CHECK_NULL);
3714     java_lang_reflect_RecordComponent::set_signature(element(), component_sig);
3715   } else {
3716     java_lang_reflect_RecordComponent::set_signature(element(), nullptr);
3717   }
3718 
3719   typeArrayOop annotation_oop = Annotations::make_java_array(component->annotations(), CHECK_NULL);
3720   java_lang_reflect_RecordComponent::set_annotations(element(), annotation_oop);
3721 
3722   typeArrayOop type_annotation_oop = Annotations::make_java_array(component->type_annotations(), CHECK_NULL);
3723   java_lang_reflect_RecordComponent::set_typeAnnotations(element(), type_annotation_oop);
3724 
3725   return element();
3726 }
3727 
3728 int reflect_ConstantPool::_oop_offset;
3729 
3730 #define CONSTANTPOOL_FIELDS_DO(macro) \
3731   macro(_oop_offset, k, "constantPoolOop", object_signature, false)
3732 
3733 void reflect_ConstantPool::compute_offsets() {
3734   InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3735   // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
3736   CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3737 }
3738 
3739 #if INCLUDE_CDS
3740 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3741   CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3742 }
3743 #endif
3744 
3745 int java_lang_reflect_Parameter::_name_offset;
3746 int java_lang_reflect_Parameter::_modifiers_offset;
3747 int java_lang_reflect_Parameter::_index_offset;
3748 int java_lang_reflect_Parameter::_executable_offset;
3749 
3750 #define PARAMETER_FIELDS_DO(macro) \
3751   macro(_name_offset,        k, vmSymbols::name_name(),        string_signature, false); \
3752   macro(_modifiers_offset,   k, vmSymbols::modifiers_name(),   int_signature,    false); \
3753   macro(_index_offset,       k, vmSymbols::index_name(),       int_signature,    false); \
3754   macro(_executable_offset,  k, vmSymbols::executable_name(),  executable_signature, false)
3755 
3756 void java_lang_reflect_Parameter::compute_offsets() {
3757   InstanceKlass* k = vmClasses::reflect_Parameter_klass();
3758   PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3759 }
3760 
3761 #if INCLUDE_CDS
3762 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3763   PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3764 }
3765 #endif
3766 
3767 Handle java_lang_reflect_Parameter::create(TRAPS) {
3768   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3769   Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3770   Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3771   InstanceKlass* ik = InstanceKlass::cast(k);
3772   // Ensure it is initialized
3773   ik->initialize(CHECK_NH);
3774   return ik->allocate_instance_handle(THREAD);
3775 }
3776 
3777 oop java_lang_reflect_Parameter::name(oop param) {
3778   return param->obj_field(_name_offset);
3779 }
3780 
3781 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3782   param->obj_field_put(_name_offset, value);
3783 }
3784 
3785 int java_lang_reflect_Parameter::modifiers(oop param) {
3786   return param->int_field(_modifiers_offset);
3787 }
3788 
3789 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3790   param->int_field_put(_modifiers_offset, value);
3791 }
3792 
3793 int java_lang_reflect_Parameter::index(oop param) {
3794   return param->int_field(_index_offset);
3795 }
3796 
3797 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3798   param->int_field_put(_index_offset, value);
3799 }
3800 
3801 oop java_lang_reflect_Parameter::executable(oop param) {
3802   return param->obj_field(_executable_offset);
3803 }
3804 
3805 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3806   param->obj_field_put(_executable_offset, value);
3807 }
3808 
3809 // java_lang_Module
3810 
3811 int java_lang_Module::_loader_offset;
3812 int java_lang_Module::_name_offset;
3813 int java_lang_Module::_module_entry_offset;
3814 
3815 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3816   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3817   return JavaCalls::construct_new_instance(vmClasses::Module_klass(),
3818                           vmSymbols::java_lang_module_init_signature(),
3819                           loader, module_name, CHECK_NH);
3820 }
3821 
3822 #define MODULE_FIELDS_DO(macro) \
3823   macro(_loader_offset,  k, vmSymbols::loader_name(),  classloader_signature, false); \
3824   macro(_name_offset,    k, vmSymbols::name_name(),    string_signature,      false)
3825 
3826 void java_lang_Module::compute_offsets() {
3827   InstanceKlass* k = vmClasses::Module_klass();
3828   MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3829   MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3830 }
3831 
3832 #if INCLUDE_CDS
3833 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3834   MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3835   MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3836 }
3837 #endif
3838 
3839 oop java_lang_Module::loader(oop module) {
3840   return module->obj_field(_loader_offset);
3841 }
3842 
3843 void java_lang_Module::set_loader(oop module, oop value) {
3844   module->obj_field_put(_loader_offset, value);
3845 }
3846 
3847 oop java_lang_Module::name(oop module) {
3848   return module->obj_field(_name_offset);
3849 }
3850 
3851 void java_lang_Module::set_name(oop module, oop value) {
3852   module->obj_field_put(_name_offset, value);
3853 }
3854 
3855 ModuleEntry* java_lang_Module::module_entry_raw(oop module) {
3856   assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3857   assert(module != nullptr, "module can't be null");
3858   assert(oopDesc::is_oop(module), "module must be oop");
3859 
3860   ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3861   return module_entry;
3862 }
3863 
3864 ModuleEntry* java_lang_Module::module_entry(oop module) {
3865   ModuleEntry* module_entry = module_entry_raw(module);
3866   if (module_entry == nullptr) {
3867     // If the inject field containing the ModuleEntry* is null then return the
3868     // class loader's unnamed module.
3869     oop loader = java_lang_Module::loader(module);
3870     Handle h_loader = Handle(Thread::current(), loader);
3871     ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3872     return loader_cld->unnamed_module();
3873   }
3874   return module_entry;
3875 }
3876 
3877 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3878   assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3879   assert(module != nullptr, "module can't be null");
3880   assert(oopDesc::is_oop(module), "module must be oop");
3881   module->address_field_put(_module_entry_offset, (address)module_entry);
3882 }
3883 
3884 Handle reflect_ConstantPool::create(TRAPS) {
3885   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3886   InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3887   // Ensure it is initialized
3888   k->initialize(CHECK_NH);
3889   return k->allocate_instance_handle(THREAD);
3890 }
3891 
3892 
3893 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3894   oop mirror = value->pool_holder()->java_mirror();
3895   // Save the mirror to get back the constant pool.
3896   reflect->obj_field_put(_oop_offset, mirror);
3897 }
3898 
3899 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3900 
3901   oop mirror = reflect->obj_field(_oop_offset);
3902   Klass* k = java_lang_Class::as_Klass(mirror);
3903   assert(k->is_instance_klass(), "Must be");
3904 
3905   // Get the constant pool back from the klass.  Since class redefinition
3906   // merges the new constant pool into the old, this is essentially the
3907   // same constant pool as the original.  If constant pool merging is
3908   // no longer done in the future, this will have to change to save
3909   // the original.
3910   return InstanceKlass::cast(k)->constants();
3911 }
3912 
3913 
3914 // Support for java_lang_ref_Reference
3915 
3916 bool java_lang_ref_Reference::_offsets_initialized;
3917 
3918 int java_lang_ref_Reference::_referent_offset;
3919 int java_lang_ref_Reference::_queue_offset;
3920 int java_lang_ref_Reference::_next_offset;
3921 int java_lang_ref_Reference::_discovered_offset;
3922 
3923 #define REFERENCE_FIELDS_DO(macro) \
3924   macro(_referent_offset,   k, "referent", object_signature, false); \
3925   macro(_queue_offset,      k, "queue", referencequeue_signature, false); \
3926   macro(_next_offset,       k, "next", reference_signature, false); \
3927   macro(_discovered_offset, k, "discovered", reference_signature, false);
3928 
3929 void java_lang_ref_Reference::compute_offsets() {
3930   if (_offsets_initialized) {
3931     return;
3932   }
3933   _offsets_initialized = true;
3934   InstanceKlass* k = vmClasses::Reference_klass();
3935   REFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3936 }
3937 
3938 #if INCLUDE_CDS
3939 void java_lang_ref_Reference::serialize_offsets(SerializeClosure* f) {
3940   f->do_bool(&_offsets_initialized);
3941   REFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3942 }
3943 #endif
3944 
3945 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
3946   assert(obj != nullptr, "sanity");
3947   if (offset != _referent_offset) {
3948     return false;
3949   }
3950 
3951   Klass* k = obj->klass();
3952   if (!k->is_instance_klass()) {
3953     return false;
3954   }
3955 
3956   InstanceKlass* ik = InstanceKlass::cast(obj->klass());
3957   bool is_reference = ik->reference_type() != REF_NONE;
3958   assert(!is_reference || ik->is_subclass_of(vmClasses::Reference_klass()), "sanity");
3959   return is_reference;
3960 }
3961 
3962 int java_lang_boxing_object::_value_offset;
3963 int java_lang_boxing_object::_long_value_offset;
3964 
3965 #define BOXING_FIELDS_DO(macro) \
3966   macro(_value_offset,      byteKlass, "value", byte_signature, false); \
3967   macro(_long_value_offset, longKlass, "value", long_signature, false);
3968 
3969 void java_lang_boxing_object::compute_offsets() {
3970   InstanceKlass* byteKlass = vmClasses::Byte_klass();
3971   InstanceKlass* longKlass = vmClasses::Long_klass();
3972   BOXING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3973 }
3974 
3975 #if INCLUDE_CDS
3976 void java_lang_boxing_object::serialize_offsets(SerializeClosure* f) {
3977   BOXING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3978 }
3979 #endif
3980 
3981 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
3982   Klass* k = vmClasses::box_klass(type);
3983   if (k == nullptr)  return nullptr;
3984   InstanceKlass* ik = InstanceKlass::cast(k);
3985   if (!ik->is_initialized()) {
3986     ik->initialize(CHECK_NULL);
3987   }
3988   return ik->allocate_instance(THREAD);
3989 }
3990 
3991 
3992 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
3993   oop box = initialize_and_allocate(type, CHECK_NULL);
3994   if (box == nullptr)  return nullptr;
3995   switch (type) {
3996     case T_BOOLEAN:
3997       box->bool_field_put(_value_offset, value->z);
3998       break;
3999     case T_CHAR:
4000       box->char_field_put(_value_offset, value->c);
4001       break;
4002     case T_FLOAT:
4003       box->float_field_put(_value_offset, value->f);
4004       break;
4005     case T_DOUBLE:
4006       box->double_field_put(_long_value_offset, value->d);
4007       break;
4008     case T_BYTE:
4009       box->byte_field_put(_value_offset, value->b);
4010       break;
4011     case T_SHORT:
4012       box->short_field_put(_value_offset, value->s);
4013       break;
4014     case T_INT:
4015       box->int_field_put(_value_offset, value->i);
4016       break;
4017     case T_LONG:
4018       box->long_field_put(_long_value_offset, value->j);
4019       break;
4020     default:
4021       return nullptr;
4022   }
4023   return box;
4024 }
4025 
4026 
4027 BasicType java_lang_boxing_object::basic_type(oop box) {
4028   if (box == nullptr)  return T_ILLEGAL;
4029   BasicType type = vmClasses::box_klass_type(box->klass());
4030   if (type == T_OBJECT)         // 'unknown' value returned by SD::bkt
4031     return T_ILLEGAL;
4032   return type;
4033 }
4034 
4035 
4036 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
4037   BasicType type = vmClasses::box_klass_type(box->klass());
4038   switch (type) {
4039   case T_BOOLEAN:
4040     value->z = box->bool_field(_value_offset);
4041     break;
4042   case T_CHAR:
4043     value->c = box->char_field(_value_offset);
4044     break;
4045   case T_FLOAT:
4046     value->f = box->float_field(_value_offset);
4047     break;
4048   case T_DOUBLE:
4049     value->d = box->double_field(_long_value_offset);
4050     break;
4051   case T_BYTE:
4052     value->b = box->byte_field(_value_offset);
4053     break;
4054   case T_SHORT:
4055     value->s = box->short_field(_value_offset);
4056     break;
4057   case T_INT:
4058     value->i = box->int_field(_value_offset);
4059     break;
4060   case T_LONG:
4061     value->j = box->long_field(_long_value_offset);
4062     break;
4063   default:
4064     return T_ILLEGAL;
4065   } // end switch
4066   return type;
4067 }
4068 
4069 
4070 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
4071   BasicType type = vmClasses::box_klass_type(box->klass());
4072   switch (type) {
4073   case T_BOOLEAN:
4074     box->bool_field_put(_value_offset, value->z);
4075     break;
4076   case T_CHAR:
4077     box->char_field_put(_value_offset, value->c);
4078     break;
4079   case T_FLOAT:
4080     box->float_field_put(_value_offset, value->f);
4081     break;
4082   case T_DOUBLE:
4083     box->double_field_put(_long_value_offset, value->d);
4084     break;
4085   case T_BYTE:
4086     box->byte_field_put(_value_offset, value->b);
4087     break;
4088   case T_SHORT:
4089     box->short_field_put(_value_offset, value->s);
4090     break;
4091   case T_INT:
4092     box->int_field_put(_value_offset, value->i);
4093     break;
4094   case T_LONG:
4095     box->long_field_put(_long_value_offset, value->j);
4096     break;
4097   default:
4098     return T_ILLEGAL;
4099   } // end switch
4100   return type;
4101 }
4102 
4103 
4104 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
4105   switch (type) {
4106   case T_BOOLEAN:   st->print("%s", value->z ? "true" : "false");   break;
4107   case T_CHAR:      st->print("%d", value->c);                      break;
4108   case T_BYTE:      st->print("%d", value->b);                      break;
4109   case T_SHORT:     st->print("%d", value->s);                      break;
4110   case T_INT:       st->print("%d", value->i);                      break;
4111   case T_LONG:      st->print(JLONG_FORMAT, value->j);              break;
4112   case T_FLOAT:     st->print("%f", value->f);                      break;
4113   case T_DOUBLE:    st->print("%lf", value->d);                     break;
4114   default:          st->print("type %d?", type);                    break;
4115   }
4116 }
4117 
4118 
4119 // Support for java_lang_ref_SoftReference
4120 //
4121 
4122 int java_lang_ref_SoftReference::_timestamp_offset;
4123 int java_lang_ref_SoftReference::_static_clock_offset;
4124 
4125 #define SOFTREFERENCE_FIELDS_DO(macro) \
4126   macro(_timestamp_offset,    k, "timestamp", long_signature, false); \
4127   macro(_static_clock_offset, k, "clock",     long_signature, true)
4128 
4129 void java_lang_ref_SoftReference::compute_offsets() {
4130   InstanceKlass* k = vmClasses::SoftReference_klass();
4131   SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4132 }
4133 
4134 #if INCLUDE_CDS
4135 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
4136   SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4137 }
4138 #endif
4139 
4140 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
4141   return ref->long_field(_timestamp_offset);
4142 }
4143 
4144 jlong java_lang_ref_SoftReference::clock() {
4145   InstanceKlass* ik = vmClasses::SoftReference_klass();
4146   oop base = ik->static_field_base_raw();
4147   return base->long_field(_static_clock_offset);
4148 }
4149 
4150 void java_lang_ref_SoftReference::set_clock(jlong value) {
4151   InstanceKlass* ik = vmClasses::SoftReference_klass();
4152   oop base = ik->static_field_base_raw();
4153   base->long_field_put(_static_clock_offset, value);
4154 }
4155 
4156 // Support for java_lang_invoke_DirectMethodHandle
4157 
4158 int java_lang_invoke_DirectMethodHandle::_member_offset;
4159 
4160 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
4161   oop member_name = nullptr;
4162   assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
4163          "a DirectMethodHandle oop is expected");
4164   return dmh->obj_field(_member_offset);
4165 }
4166 
4167 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
4168   macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
4169 
4170 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
4171   InstanceKlass* k = vmClasses::DirectMethodHandle_klass();
4172   DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4173 }
4174 
4175 #if INCLUDE_CDS
4176 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
4177   DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4178 }
4179 #endif
4180 
4181 // Support for java_lang_invoke_MethodHandle
4182 
4183 int java_lang_invoke_MethodHandle::_type_offset;
4184 int java_lang_invoke_MethodHandle::_form_offset;
4185 
4186 int java_lang_invoke_MemberName::_clazz_offset;
4187 int java_lang_invoke_MemberName::_name_offset;
4188 int java_lang_invoke_MemberName::_type_offset;
4189 int java_lang_invoke_MemberName::_flags_offset;
4190 int java_lang_invoke_MemberName::_method_offset;
4191 int java_lang_invoke_MemberName::_vmindex_offset;
4192 
4193 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
4194 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
4195 
4196 int java_lang_invoke_LambdaForm::_vmentry_offset;
4197 
4198 #define METHODHANDLE_FIELDS_DO(macro) \
4199   macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
4200   macro(_form_offset, k, "form",                 java_lang_invoke_LambdaForm_signature, false)
4201 
4202 void java_lang_invoke_MethodHandle::compute_offsets() {
4203   InstanceKlass* k = vmClasses::MethodHandle_klass();
4204   METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4205 }
4206 
4207 #if INCLUDE_CDS
4208 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
4209   METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4210 }
4211 #endif
4212 
4213 #define MEMBERNAME_FIELDS_DO(macro) \
4214   macro(_clazz_offset,   k, vmSymbols::clazz_name(),   class_signature,  false); \
4215   macro(_name_offset,    k, vmSymbols::name_name(),    string_signature, false); \
4216   macro(_type_offset,    k, vmSymbols::type_name(),    object_signature, false); \
4217   macro(_flags_offset,   k, vmSymbols::flags_name(),   int_signature,    false); \
4218   macro(_method_offset,  k, vmSymbols::method_name(),  java_lang_invoke_ResolvedMethodName_signature, false)
4219 
4220 void java_lang_invoke_MemberName::compute_offsets() {
4221   InstanceKlass* k = vmClasses::MemberName_klass();
4222   MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4223   MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4224 }
4225 
4226 #if INCLUDE_CDS
4227 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
4228   MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4229   MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4230 }
4231 #endif
4232 
4233 #define RESOLVEDMETHOD_FIELDS_DO(macro) \
4234   macro(_vmholder_offset, k, "vmholder", class_signature, false)
4235 
4236 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
4237   InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4238   assert(k != nullptr, "jdk mismatch");
4239   RESOLVEDMETHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4240   RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4241 }
4242 
4243 #if INCLUDE_CDS
4244 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
4245   RESOLVEDMETHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4246   RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4247 }
4248 #endif
4249 
4250 #define LAMBDAFORM_FIELDS_DO(macro) \
4251   macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
4252 
4253 void java_lang_invoke_LambdaForm::compute_offsets() {
4254   InstanceKlass* k = vmClasses::LambdaForm_klass();
4255   assert (k != nullptr, "jdk mismatch");
4256   LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4257 }
4258 
4259 #if INCLUDE_CDS
4260 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
4261   LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4262 }
4263 #endif
4264 
4265 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
4266   return obj != nullptr && is_subclass(obj->klass());
4267 }
4268 
4269 int jdk_internal_foreign_abi_NativeEntryPoint::_method_type_offset;
4270 int jdk_internal_foreign_abi_NativeEntryPoint::_downcall_stub_address_offset;
4271 
4272 #define NEP_FIELDS_DO(macro) \
4273   macro(_method_type_offset,           k, "methodType",          java_lang_invoke_MethodType_signature, false); \
4274   macro(_downcall_stub_address_offset, k, "downcallStubAddress", long_signature, false);
4275 
4276 bool jdk_internal_foreign_abi_NativeEntryPoint::is_instance(oop obj) {
4277   return obj != nullptr && is_subclass(obj->klass());
4278 }
4279 
4280 void jdk_internal_foreign_abi_NativeEntryPoint::compute_offsets() {
4281   InstanceKlass* k = vmClasses::NativeEntryPoint_klass();
4282   NEP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4283 }
4284 
4285 #if INCLUDE_CDS
4286 void jdk_internal_foreign_abi_NativeEntryPoint::serialize_offsets(SerializeClosure* f) {
4287   NEP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4288 }
4289 #endif
4290 
4291 oop jdk_internal_foreign_abi_NativeEntryPoint::method_type(oop entry) {
4292   return entry->obj_field(_method_type_offset);
4293 }
4294 
4295 jlong jdk_internal_foreign_abi_NativeEntryPoint::downcall_stub_address(oop entry) {
4296   return entry->long_field(_downcall_stub_address_offset);
4297 }
4298 
4299 int jdk_internal_foreign_abi_ABIDescriptor::_inputStorage_offset;
4300 int jdk_internal_foreign_abi_ABIDescriptor::_outputStorage_offset;
4301 int jdk_internal_foreign_abi_ABIDescriptor::_volatileStorage_offset;
4302 int jdk_internal_foreign_abi_ABIDescriptor::_stackAlignment_offset;
4303 int jdk_internal_foreign_abi_ABIDescriptor::_shadowSpace_offset;
4304 int jdk_internal_foreign_abi_ABIDescriptor::_scratch1_offset;
4305 int jdk_internal_foreign_abi_ABIDescriptor::_scratch2_offset;
4306 
4307 #define ABIDescriptor_FIELDS_DO(macro) \
4308   macro(_inputStorage_offset,    k, "inputStorage",    jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4309   macro(_outputStorage_offset,   k, "outputStorage",   jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4310   macro(_volatileStorage_offset, k, "volatileStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4311   macro(_stackAlignment_offset,  k, "stackAlignment",  int_signature, false); \
4312   macro(_shadowSpace_offset,     k, "shadowSpace",     int_signature, false); \
4313   macro(_scratch1_offset,        k, "scratch1",        jdk_internal_foreign_abi_VMStorage_signature, false); \
4314   macro(_scratch2_offset,        k, "scratch2",        jdk_internal_foreign_abi_VMStorage_signature, false);
4315 
4316 bool jdk_internal_foreign_abi_ABIDescriptor::is_instance(oop obj) {
4317   return obj != nullptr && is_subclass(obj->klass());
4318 }
4319 
4320 void jdk_internal_foreign_abi_ABIDescriptor::compute_offsets() {
4321   InstanceKlass* k = vmClasses::ABIDescriptor_klass();
4322   ABIDescriptor_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4323 }
4324 
4325 #if INCLUDE_CDS
4326 void jdk_internal_foreign_abi_ABIDescriptor::serialize_offsets(SerializeClosure* f) {
4327   ABIDescriptor_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4328 }
4329 #endif
4330 
4331 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::inputStorage(oop entry) {
4332   return oop_cast<objArrayOop>(entry->obj_field(_inputStorage_offset));
4333 }
4334 
4335 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::outputStorage(oop entry) {
4336   return oop_cast<objArrayOop>(entry->obj_field(_outputStorage_offset));
4337 }
4338 
4339 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::volatileStorage(oop entry) {
4340   return oop_cast<objArrayOop>(entry->obj_field(_volatileStorage_offset));
4341 }
4342 
4343 jint jdk_internal_foreign_abi_ABIDescriptor::stackAlignment(oop entry) {
4344   return entry->int_field(_stackAlignment_offset);
4345 }
4346 
4347 jint jdk_internal_foreign_abi_ABIDescriptor::shadowSpace(oop entry) {
4348   return entry->int_field(_shadowSpace_offset);
4349 }
4350 
4351 oop jdk_internal_foreign_abi_ABIDescriptor::scratch1(oop entry) {
4352   return entry->obj_field(_scratch1_offset);
4353 }
4354 
4355 oop jdk_internal_foreign_abi_ABIDescriptor::scratch2(oop entry) {
4356   return entry->obj_field(_scratch2_offset);
4357 }
4358 
4359 int jdk_internal_foreign_abi_VMStorage::_type_offset;
4360 int jdk_internal_foreign_abi_VMStorage::_indexOrOffset_offset;
4361 int jdk_internal_foreign_abi_VMStorage::_segmentMaskOrSize_offset;
4362 int jdk_internal_foreign_abi_VMStorage::_debugName_offset;
4363 
4364 #define VMStorage_FIELDS_DO(macro) \
4365   macro(_type_offset,              k, "type",              byte_signature, false); \
4366   macro(_indexOrOffset_offset,     k, "indexOrOffset",     int_signature, false); \
4367   macro(_segmentMaskOrSize_offset, k, "segmentMaskOrSize", short_signature, false); \
4368   macro(_debugName_offset,         k, "debugName",         string_signature, false); \
4369 
4370 bool jdk_internal_foreign_abi_VMStorage::is_instance(oop obj) {
4371   return obj != nullptr && is_subclass(obj->klass());
4372 }
4373 
4374 void jdk_internal_foreign_abi_VMStorage::compute_offsets() {
4375   InstanceKlass* k = vmClasses::VMStorage_klass();
4376   VMStorage_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4377 }
4378 
4379 #if INCLUDE_CDS
4380 void jdk_internal_foreign_abi_VMStorage::serialize_offsets(SerializeClosure* f) {
4381   VMStorage_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4382 }
4383 #endif
4384 
4385 jbyte jdk_internal_foreign_abi_VMStorage::type(oop entry) {
4386   return entry->byte_field(_type_offset);
4387 }
4388 
4389 jint jdk_internal_foreign_abi_VMStorage::index_or_offset(oop entry) {
4390   return entry->int_field(_indexOrOffset_offset);
4391 }
4392 
4393 jshort jdk_internal_foreign_abi_VMStorage::segment_mask_or_size(oop entry) {
4394   return entry->short_field(_segmentMaskOrSize_offset);
4395 }
4396 
4397 oop jdk_internal_foreign_abi_VMStorage::debugName(oop entry) {
4398   return entry->obj_field(_debugName_offset);
4399 }
4400 
4401 int jdk_internal_foreign_abi_CallConv::_argRegs_offset;
4402 int jdk_internal_foreign_abi_CallConv::_retRegs_offset;
4403 
4404 #define CallConv_FIELDS_DO(macro) \
4405   macro(_argRegs_offset, k, "argRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4406   macro(_retRegs_offset, k, "retRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4407 
4408 bool jdk_internal_foreign_abi_CallConv::is_instance(oop obj) {
4409   return obj != nullptr && is_subclass(obj->klass());
4410 }
4411 
4412 void jdk_internal_foreign_abi_CallConv::compute_offsets() {
4413   InstanceKlass* k = vmClasses::CallConv_klass();
4414   CallConv_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4415 }
4416 
4417 #if INCLUDE_CDS
4418 void jdk_internal_foreign_abi_CallConv::serialize_offsets(SerializeClosure* f) {
4419   CallConv_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4420 }
4421 #endif
4422 
4423 objArrayOop jdk_internal_foreign_abi_CallConv::argRegs(oop entry) {
4424   return oop_cast<objArrayOop>(entry->obj_field(_argRegs_offset));
4425 }
4426 
4427 objArrayOop jdk_internal_foreign_abi_CallConv::retRegs(oop entry) {
4428   return oop_cast<objArrayOop>(entry->obj_field(_retRegs_offset));
4429 }
4430 
4431 oop java_lang_invoke_MethodHandle::type(oop mh) {
4432   return mh->obj_field(_type_offset);
4433 }
4434 
4435 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
4436   mh->obj_field_put(_type_offset, mtype);
4437 }
4438 
4439 oop java_lang_invoke_MethodHandle::form(oop mh) {
4440   assert(_form_offset != 0, "");
4441   return mh->obj_field(_form_offset);
4442 }
4443 
4444 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
4445   assert(_form_offset != 0, "");
4446   mh->obj_field_put(_form_offset, lform);
4447 }
4448 
4449 /// MemberName accessors
4450 
4451 oop java_lang_invoke_MemberName::clazz(oop mname) {
4452   assert(is_instance(mname), "wrong type");
4453   return mname->obj_field(_clazz_offset);
4454 }
4455 
4456 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
4457   assert(is_instance(mname), "wrong type");
4458   mname->obj_field_put(_clazz_offset, clazz);
4459 }
4460 
4461 oop java_lang_invoke_MemberName::name(oop mname) {
4462   assert(is_instance(mname), "wrong type");
4463   return mname->obj_field(_name_offset);
4464 }
4465 
4466 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
4467   assert(is_instance(mname), "wrong type");
4468   mname->obj_field_put(_name_offset, name);
4469 }
4470 
4471 oop java_lang_invoke_MemberName::type(oop mname) {
4472   assert(is_instance(mname), "wrong type");
4473   return mname->obj_field(_type_offset);
4474 }
4475 
4476 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
4477   assert(is_instance(mname), "wrong type");
4478   mname->obj_field_put(_type_offset, type);
4479 }
4480 
4481 int java_lang_invoke_MemberName::flags(oop mname) {
4482   assert(is_instance(mname), "wrong type");
4483   return mname->int_field(_flags_offset);
4484 }
4485 
4486 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
4487   assert(is_instance(mname), "wrong type");
4488   mname->int_field_put(_flags_offset, flags);
4489 }
4490 

4491 // Return vmtarget from ResolvedMethodName method field through indirection
4492 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
4493   assert(is_instance(mname), "wrong type");
4494   oop method = mname->obj_field(_method_offset);
4495   return method == nullptr ? nullptr : java_lang_invoke_ResolvedMethodName::vmtarget(method);
4496 }
4497 
4498 bool java_lang_invoke_MemberName::is_method(oop mname) {
4499   assert(is_instance(mname), "must be MemberName");
4500   return (flags(mname) & (MN_IS_METHOD | MN_IS_OBJECT_CONSTRUCTOR)) > 0;
4501 }
4502 
4503 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
4504   assert(is_instance(mname), "wrong type");
4505   mname->obj_field_put(_method_offset, resolved_method);
4506 }
4507 
4508 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
4509   assert(is_instance(mname), "wrong type");
4510   return (intptr_t) mname->address_field(_vmindex_offset);
4511 }
4512 
4513 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
4514   assert(is_instance(mname), "wrong type");
4515   mname->address_field_put(_vmindex_offset, (address) index);
4516 }
4517 
4518 
4519 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
4520   assert(is_instance(resolved_method), "wrong type");
4521   Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
4522   assert(m->is_method(), "must be");
4523   return m;
4524 }
4525 
4526 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
4527 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
4528   assert(is_instance(resolved_method), "wrong type");
4529   resolved_method->address_field_put(_vmtarget_offset, (address)m);
4530 }
4531 
4532 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) {
4533   assert(is_instance(resolved_method), "wrong type");
4534   resolved_method->obj_field_put(_vmholder_offset, holder);
4535 }
4536 
4537 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
4538   const Method* method = m();
4539 
4540   // lookup ResolvedMethod oop in the table, or create a new one and intern it
4541   oop resolved_method = ResolvedMethodTable::find_method(method);
4542   if (resolved_method != nullptr) {
4543     return resolved_method;
4544   }
4545 
4546   InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4547   if (!k->is_initialized()) {
4548     k->initialize(CHECK_NULL);
4549   }
4550 
4551   oop new_resolved_method = k->allocate_instance(CHECK_NULL);
4552 
4553   NoSafepointVerifier nsv;
4554 
4555   if (method->is_old()) {
4556     method = (method->is_deleted()) ? Universe::throw_no_such_method_error() :
4557                                       method->get_new_method();
4558   }
4559 
4560   InstanceKlass* holder = method->method_holder();
4561 
4562   set_vmtarget(new_resolved_method, const_cast<Method*>(method));
4563   // Add a reference to the loader (actually mirror because hidden classes may not have
4564   // distinct loaders) to ensure the metadata is kept alive.
4565   // This mirror may be different than the one in clazz field.
4566   set_vmholder(new_resolved_method, holder->java_mirror());
4567 
4568   // Set flag in class to indicate this InstanceKlass has entries in the table
4569   // to avoid walking table during redefinition if none of the redefined classes
4570   // have any membernames in the table.
4571   holder->set_has_resolved_methods();
4572 
4573   return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method));
4574 }
4575 
4576 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
4577   assert(is_instance(lform), "wrong type");
4578   return lform->obj_field(_vmentry_offset);
4579 }
4580 
4581 
4582 // Support for java_lang_invoke_MethodType
4583 
4584 int java_lang_invoke_MethodType::_rtype_offset;
4585 int java_lang_invoke_MethodType::_ptypes_offset;
4586 
4587 #define METHODTYPE_FIELDS_DO(macro) \
4588   macro(_rtype_offset,  k, "rtype",  class_signature,       false); \
4589   macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
4590 
4591 void java_lang_invoke_MethodType::compute_offsets() {
4592   InstanceKlass* k = vmClasses::MethodType_klass();
4593   METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4594 }
4595 
4596 #if INCLUDE_CDS
4597 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
4598   METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4599 }
4600 #endif
4601 
4602 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
4603   st->print("(");
4604   objArrayOop pts = ptypes(mt);
4605   if (pts != nullptr) {
4606     for (int i = 0, limit = pts->length(); i < limit; i++) {
4607       java_lang_Class::print_signature(pts->obj_at(i), st);
4608     }
4609   } else {
4610     st->print("null");
4611   }
4612   st->print(")");
4613   oop rt = rtype(mt);
4614   if (rt != nullptr) {
4615     java_lang_Class::print_signature(rt, st);
4616   } else {
4617     st->print("null");
4618   }
4619 }
4620 
4621 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) {
4622   ResourceMark rm;
4623   stringStream buffer(128);
4624   print_signature(mt, &buffer);
4625   const char* sigstr =       buffer.base();
4626   int         siglen = (int) buffer.size();
4627   Symbol *name;
4628   if (!intern_if_not_found) {
4629     name = SymbolTable::probe(sigstr, siglen);
4630   } else {
4631     name = SymbolTable::new_symbol(sigstr, siglen);
4632   }
4633   return name;
4634 }
4635 
4636 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
4637   if (mt1 == mt2)
4638     return true;
4639   if (rtype(mt1) != rtype(mt2))
4640     return false;
4641   if (ptype_count(mt1) != ptype_count(mt2))
4642     return false;
4643   for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
4644     if (ptype(mt1, i) != ptype(mt2, i))
4645       return false;
4646   }
4647   return true;
4648 }
4649 
4650 oop java_lang_invoke_MethodType::rtype(oop mt) {
4651   assert(is_instance(mt), "must be a MethodType");
4652   return mt->obj_field(_rtype_offset);
4653 }
4654 
4655 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
4656   assert(is_instance(mt), "must be a MethodType");
4657   return (objArrayOop) mt->obj_field(_ptypes_offset);
4658 }
4659 
4660 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
4661   return ptypes(mt)->obj_at(idx);
4662 }
4663 
4664 int java_lang_invoke_MethodType::ptype_count(oop mt) {
4665   return ptypes(mt)->length();
4666 }
4667 
4668 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
4669   objArrayOop pts = ptypes(mt);
4670   int count = pts->length();
4671   int slots = 0;
4672   for (int i = 0; i < count; i++) {
4673     BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
4674     slots += type2size[bt];
4675   }
4676   return slots;
4677 }
4678 
4679 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
4680   BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
4681   return type2size[bt];
4682 }
4683 
4684 
4685 // Support for java_lang_invoke_CallSite
4686 
4687 int java_lang_invoke_CallSite::_target_offset;
4688 int java_lang_invoke_CallSite::_context_offset;
4689 
4690 #define CALLSITE_FIELDS_DO(macro) \
4691   macro(_target_offset,  k, "target", java_lang_invoke_MethodHandle_signature, false); \
4692   macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false)
4693 
4694 void java_lang_invoke_CallSite::compute_offsets() {
4695   InstanceKlass* k = vmClasses::CallSite_klass();
4696   CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4697 }
4698 
4699 #if INCLUDE_CDS
4700 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
4701   CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4702 }
4703 #endif
4704 
4705 oop java_lang_invoke_CallSite::context_no_keepalive(oop call_site) {
4706   assert(java_lang_invoke_CallSite::is_instance(call_site), "");
4707 
4708   oop dep_oop = call_site->obj_field_access<AS_NO_KEEPALIVE>(_context_offset);
4709   return dep_oop;
4710 }
4711 
4712 // Support for java_lang_invoke_ConstantCallSite
4713 
4714 int java_lang_invoke_ConstantCallSite::_is_frozen_offset;
4715 
4716 #define CONSTANTCALLSITE_FIELDS_DO(macro) \
4717   macro(_is_frozen_offset, k, "isFrozen", bool_signature, false)
4718 
4719 void java_lang_invoke_ConstantCallSite::compute_offsets() {
4720   InstanceKlass* k = vmClasses::ConstantCallSite_klass();
4721   CONSTANTCALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4722 }
4723 
4724 #if INCLUDE_CDS
4725 void java_lang_invoke_ConstantCallSite::serialize_offsets(SerializeClosure* f) {
4726   CONSTANTCALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4727 }
4728 #endif
4729 
4730 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext
4731 
4732 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset;
4733 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_last_cleanup_offset;
4734 
4735 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() {
4736   InstanceKlass* k = vmClasses::Context_klass();
4737   CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4738 }
4739 
4740 #if INCLUDE_CDS
4741 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) {
4742   CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4743 }
4744 #endif
4745 
4746 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) {
4747   assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
4748   nmethodBucket* volatile* vmdeps_addr = call_site->field_addr<nmethodBucket* volatile>(_vmdependencies_offset);
4749   volatile uint64_t* last_cleanup_addr = call_site->field_addr<volatile uint64_t>(_last_cleanup_offset);
4750   DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr);
4751   return dep_ctx;
4752 }
4753 
4754 // Support for java_lang_ClassLoader
4755 
4756 int  java_lang_ClassLoader::_loader_data_offset;
4757 int  java_lang_ClassLoader::_parallelCapable_offset;
4758 int  java_lang_ClassLoader::_name_offset;
4759 int  java_lang_ClassLoader::_nameAndId_offset;
4760 int  java_lang_ClassLoader::_unnamedModule_offset;
4761 int  java_lang_ClassLoader::_parent_offset;
4762 
4763 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
4764   assert(loader != nullptr, "loader must not be null");
4765   assert(oopDesc::is_oop(loader), "loader must be oop");
4766   return Atomic::load_acquire(loader->field_addr<ClassLoaderData*>(_loader_data_offset));
4767 }
4768 
4769 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
4770   assert(loader != nullptr, "loader must not be null");
4771   assert(oopDesc::is_oop(loader), "loader must be oop");
4772   return *loader->field_addr<ClassLoaderData*>(_loader_data_offset);
4773 }
4774 
4775 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
4776   assert(loader != nullptr, "loader must not be null");
4777   assert(oopDesc::is_oop(loader), "loader must be oop");
4778   Atomic::release_store(loader->field_addr<ClassLoaderData*>(_loader_data_offset), new_data);
4779 }
4780 
4781 #define CLASSLOADER_FIELDS_DO(macro) \
4782   macro(_parallelCapable_offset, k1, "parallelLockMap",      concurrenthashmap_signature, false); \
4783   macro(_name_offset,            k1, vmSymbols::name_name(), string_signature, false); \
4784   macro(_nameAndId_offset,       k1, "nameAndId",            string_signature, false); \
4785   macro(_unnamedModule_offset,   k1, "unnamedModule",        module_signature, false); \
4786   macro(_parent_offset,          k1, "parent",               classloader_signature, false)
4787 
4788 void java_lang_ClassLoader::compute_offsets() {
4789   InstanceKlass* k1 = vmClasses::ClassLoader_klass();
4790   CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4791 
4792   CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4793 }
4794 
4795 #if INCLUDE_CDS
4796 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
4797   CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4798   CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4799 }
4800 #endif
4801 
4802 oop java_lang_ClassLoader::parent(oop loader) {
4803   assert(is_instance(loader), "loader must be oop");
4804   return loader->obj_field(_parent_offset);
4805 }
4806 
4807 oop java_lang_ClassLoader::parent_no_keepalive(oop loader) {
4808   assert(is_instance(loader), "loader must be oop");
4809   return loader->obj_field_access<AS_NO_KEEPALIVE>(_parent_offset);
4810 }
4811 
4812 // Returns the name field of this class loader.  If the name field has not
4813 // been set, null will be returned.
4814 oop java_lang_ClassLoader::name(oop loader) {
4815   assert(is_instance(loader), "loader must be oop");
4816   return loader->obj_field(_name_offset);
4817 }
4818 
4819 // Returns the nameAndId field of this class loader. The format is
4820 // as follows:
4821 //   If the defining loader has a name explicitly set then '<loader-name>' @<id>
4822 //   If the defining loader has no name then <qualified-class-name> @<id>
4823 //   If built-in loader, then omit '@<id>' as there is only one instance.
4824 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
4825 oop java_lang_ClassLoader::nameAndId(oop loader) {
4826   assert(is_instance(loader), "loader must be oop");
4827   return loader->obj_field(_nameAndId_offset);
4828 }
4829 
4830 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
4831   assert(is_instance(loader), "loader must be oop");
4832   assert(cl == nullptr || is_instance(cl), "cl argument must be oop");
4833   oop acl = loader;
4834   debug_only(jint loop_count = 0);
4835   // This loop taken verbatim from ClassLoader.java:
4836   do {
4837     acl = parent(acl);
4838     if (cl == acl) {
4839       return true;
4840     }
4841     assert(++loop_count > 0, "loop_count overflow");
4842   } while (acl != nullptr);
4843   return false;
4844 }
4845 
4846 bool java_lang_ClassLoader::is_instance(oop obj) {
4847   return obj != nullptr && is_subclass(obj->klass());
4848 }
4849 
4850 
4851 // For class loader classes, parallelCapable defined
4852 // based on non-null field
4853 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
4854 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
4855   assert(_parallelCapable_offset != 0, "offsets should have been initialized");
4856   return (class_loader->obj_field(_parallelCapable_offset) != nullptr);
4857 }
4858 
4859 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
4860   oop cl = SystemDictionary::java_system_loader();
4861   while(cl != nullptr) {
4862     if (cl == loader) return true;
4863     cl = parent(cl);
4864   }
4865   return false;
4866 }
4867 
4868 oop java_lang_ClassLoader::unnamedModule(oop loader) {
4869   assert(is_instance(loader), "loader must be oop");
4870   return loader->obj_field(_unnamedModule_offset);
4871 }
4872 
4873 // Support for java_lang_System
4874 //
4875 
4876 int java_lang_System::_static_in_offset;
4877 int java_lang_System::_static_out_offset;
4878 int java_lang_System::_static_err_offset;
4879 
4880 #define SYSTEM_FIELDS_DO(macro) \
4881   macro(_static_in_offset,  k, "in",  input_stream_signature, true); \
4882   macro(_static_out_offset, k, "out", print_stream_signature, true); \
4883   macro(_static_err_offset, k, "err", print_stream_signature, true);
4884 
4885 void java_lang_System::compute_offsets() {
4886   InstanceKlass* k = vmClasses::System_klass();
4887   SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4888 }
4889 
4890 #if INCLUDE_CDS
4891 void java_lang_System::serialize_offsets(SerializeClosure* f) {
4892    SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4893 }
4894 #endif
4895 
4896 // Support for jdk_internal_misc_UnsafeConstants
4897 //
4898 class UnsafeConstantsFixup : public FieldClosure {
4899 private:
4900   int _address_size;
4901   int _page_size;
4902   bool _big_endian;
4903   bool _use_unaligned_access;
4904   int _data_cache_line_flush_size;
4905 public:
4906   UnsafeConstantsFixup() {
4907     // round up values for all static final fields
4908     _address_size = sizeof(void*);
4909     _page_size = AIX_ONLY(sysconf(_SC_PAGESIZE)) NOT_AIX((int)os::vm_page_size());
4910     _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true);
4911     _use_unaligned_access = UseUnalignedAccesses;
4912     _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size();
4913   }
4914 
4915   void do_field(fieldDescriptor* fd) {
4916     oop mirror = fd->field_holder()->java_mirror();
4917     assert(mirror != nullptr, "UnsafeConstants must have mirror already");
4918     assert(fd->field_holder() == vmClasses::UnsafeConstants_klass(), "Should be UnsafeConstants");
4919     assert(fd->is_final(), "fields of UnsafeConstants must be final");
4920     assert(fd->is_static(), "fields of UnsafeConstants must be static");
4921     if (fd->name() == vmSymbols::address_size_name()) {
4922       mirror->int_field_put(fd->offset(), _address_size);
4923     } else if (fd->name() == vmSymbols::page_size_name()) {
4924       mirror->int_field_put(fd->offset(), _page_size);
4925     } else if (fd->name() == vmSymbols::big_endian_name()) {
4926       mirror->bool_field_put(fd->offset(), _big_endian);
4927     } else if (fd->name() == vmSymbols::use_unaligned_access_name()) {
4928       mirror->bool_field_put(fd->offset(), _use_unaligned_access);
4929     } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) {
4930       mirror->int_field_put(fd->offset(), _data_cache_line_flush_size);
4931     } else {
4932       assert(false, "unexpected UnsafeConstants field");
4933     }
4934   }
4935 };
4936 
4937 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() {
4938   UnsafeConstantsFixup fixup;
4939   vmClasses::UnsafeConstants_klass()->do_local_static_fields(&fixup);
4940 }
4941 
4942 
4943 // java_lang_StackTraceElement
4944 
4945 int java_lang_StackTraceElement::_methodName_offset;
4946 int java_lang_StackTraceElement::_fileName_offset;
4947 int java_lang_StackTraceElement::_lineNumber_offset;
4948 int java_lang_StackTraceElement::_moduleName_offset;
4949 int java_lang_StackTraceElement::_moduleVersion_offset;
4950 int java_lang_StackTraceElement::_classLoaderName_offset;
4951 int java_lang_StackTraceElement::_declaringClass_offset;
4952 int java_lang_StackTraceElement::_declaringClassObject_offset;
4953 
4954 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4955   macro(_declaringClassObject_offset,  k, "declaringClassObject", class_signature, false); \
4956   macro(_classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4957   macro(_moduleName_offset,      k, "moduleName",      string_signature, false); \
4958   macro(_moduleVersion_offset,   k, "moduleVersion",   string_signature, false); \
4959   macro(_declaringClass_offset,  k, "declaringClass",  string_signature, false); \
4960   macro(_methodName_offset,      k, "methodName",      string_signature, false); \
4961   macro(_fileName_offset,        k, "fileName",        string_signature, false); \
4962   macro(_lineNumber_offset,      k, "lineNumber",      int_signature,    false)
4963 
4964 // Support for java_lang_StackTraceElement
4965 void java_lang_StackTraceElement::compute_offsets() {
4966   InstanceKlass* k = vmClasses::StackTraceElement_klass();
4967   STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4968 }
4969 
4970 #if INCLUDE_CDS
4971 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
4972   STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4973 }
4974 #endif
4975 
4976 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
4977   element->obj_field_put(_fileName_offset, value);
4978 }
4979 
4980 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
4981   element->obj_field_put(_declaringClass_offset, value);
4982 }
4983 
4984 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
4985   element->obj_field_put(_methodName_offset, value);
4986 }
4987 
4988 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
4989   element->int_field_put(_lineNumber_offset, value);
4990 }
4991 
4992 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
4993   element->obj_field_put(_moduleName_offset, value);
4994 }
4995 
4996 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
4997   element->obj_field_put(_moduleVersion_offset, value);
4998 }
4999 
5000 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
5001   element->obj_field_put(_classLoaderName_offset, value);
5002 }
5003 
5004 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
5005   element->obj_field_put(_declaringClassObject_offset, value);
5006 }
5007 
5008 
5009 // java_lang_AssertionStatusDirectives
5010 
5011 int java_lang_AssertionStatusDirectives::_classes_offset;
5012 int java_lang_AssertionStatusDirectives::_classEnabled_offset;
5013 int java_lang_AssertionStatusDirectives::_packages_offset;
5014 int java_lang_AssertionStatusDirectives::_packageEnabled_offset;
5015 int java_lang_AssertionStatusDirectives::_deflt_offset;
5016 
5017 // Support for java Assertions - java_lang_AssertionStatusDirectives.
5018 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
5019   macro(_classes_offset,        k, "classes",        string_array_signature, false); \
5020   macro(_classEnabled_offset,   k, "classEnabled",   bool_array_signature, false); \
5021   macro(_packages_offset,       k, "packages",       string_array_signature, false); \
5022   macro(_packageEnabled_offset, k, "packageEnabled", bool_array_signature,   false); \
5023   macro(_deflt_offset,          k, "deflt",          bool_signature,         false)
5024 
5025 void java_lang_AssertionStatusDirectives::compute_offsets() {
5026   InstanceKlass* k = vmClasses::AssertionStatusDirectives_klass();
5027   ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5028 }
5029 
5030 #if INCLUDE_CDS
5031 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
5032   ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5033 }
5034 #endif
5035 
5036 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
5037   o->obj_field_put(_classes_offset, val);
5038 }
5039 
5040 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
5041   o->obj_field_put(_classEnabled_offset, val);
5042 }
5043 
5044 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
5045   o->obj_field_put(_packages_offset, val);
5046 }
5047 
5048 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
5049   o->obj_field_put(_packageEnabled_offset, val);
5050 }
5051 
5052 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
5053   o->bool_field_put(_deflt_offset, val);
5054 }
5055 
5056 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
5057 
5058 #define AOS_FIELDS_DO(macro) \
5059   macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
5060 
5061 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
5062   InstanceKlass* k = vmClasses::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
5063   AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5064 }
5065 
5066 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
5067   assert(_owner_offset != 0, "Must be initialized");
5068   return obj->obj_field(_owner_offset);
5069 }
5070 
5071 #if INCLUDE_CDS
5072 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
5073   AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5074 }
5075 #endif
5076 
5077 int vector_VectorPayload::_payload_offset;
5078 
5079 #define VECTORPAYLOAD_FIELDS_DO(macro) \
5080   macro(_payload_offset, k, "payload", object_signature, false)
5081 
5082 void vector_VectorPayload::compute_offsets() {
5083   InstanceKlass* k = vmClasses::vector_VectorPayload_klass();
5084   VECTORPAYLOAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5085 }
5086 
5087 #if INCLUDE_CDS
5088 void vector_VectorPayload::serialize_offsets(SerializeClosure* f) {
5089   VECTORPAYLOAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5090 }
5091 #endif
5092 
5093 void vector_VectorPayload::set_payload(oop o, oop val) {
5094   o->obj_field_put(_payload_offset, val);
5095 }
5096 
5097 bool vector_VectorPayload::is_instance(oop obj) {
5098   return obj != nullptr && is_subclass(obj->klass());
5099 }
5100 
5101 int java_lang_Integer_IntegerCache::_static_cache_offset;
5102 int java_lang_Long_LongCache::_static_cache_offset;
5103 int java_lang_Character_CharacterCache::_static_cache_offset;
5104 int java_lang_Short_ShortCache::_static_cache_offset;
5105 int java_lang_Byte_ByteCache::_static_cache_offset;
5106 
5107 #define INTEGER_CACHE_FIELDS_DO(macro) \
5108   macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true)
5109 
5110 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) {
5111   guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5112   INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5113 }
5114 
5115 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) {
5116   oop base = ik->static_field_base_raw();
5117   return objArrayOop(base->obj_field(_static_cache_offset));
5118 }
5119 
5120 Symbol* java_lang_Integer_IntegerCache::symbol() {
5121   return vmSymbols::java_lang_Integer_IntegerCache();
5122 }
5123 
5124 #if INCLUDE_CDS
5125 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) {
5126   INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5127 }
5128 #endif
5129 #undef INTEGER_CACHE_FIELDS_DO
5130 
5131 jint java_lang_Integer::value(oop obj) {
5132    jvalue v;
5133    java_lang_boxing_object::get_value(obj, &v);
5134    return v.i;
5135 }
5136 
5137 #define LONG_CACHE_FIELDS_DO(macro) \
5138   macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true)
5139 
5140 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) {
5141   guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5142   LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5143 }
5144 
5145 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) {
5146   oop base = ik->static_field_base_raw();
5147   return objArrayOop(base->obj_field(_static_cache_offset));
5148 }
5149 
5150 Symbol* java_lang_Long_LongCache::symbol() {
5151   return vmSymbols::java_lang_Long_LongCache();
5152 }
5153 
5154 #if INCLUDE_CDS
5155 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) {
5156   LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5157 }
5158 #endif
5159 #undef LONG_CACHE_FIELDS_DO
5160 
5161 jlong java_lang_Long::value(oop obj) {
5162    jvalue v;
5163    java_lang_boxing_object::get_value(obj, &v);
5164    return v.j;
5165 }
5166 
5167 #define CHARACTER_CACHE_FIELDS_DO(macro) \
5168   macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true)
5169 
5170 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) {
5171   guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5172   CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5173 }
5174 
5175 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) {
5176   oop base = ik->static_field_base_raw();
5177   return objArrayOop(base->obj_field(_static_cache_offset));
5178 }
5179 
5180 Symbol* java_lang_Character_CharacterCache::symbol() {
5181   return vmSymbols::java_lang_Character_CharacterCache();
5182 }
5183 
5184 #if INCLUDE_CDS
5185 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) {
5186   CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5187 }
5188 #endif
5189 #undef CHARACTER_CACHE_FIELDS_DO
5190 
5191 jchar java_lang_Character::value(oop obj) {
5192    jvalue v;
5193    java_lang_boxing_object::get_value(obj, &v);
5194    return v.c;
5195 }
5196 
5197 #define SHORT_CACHE_FIELDS_DO(macro) \
5198   macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true)
5199 
5200 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) {
5201   guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5202   SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5203 }
5204 
5205 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) {
5206   oop base = ik->static_field_base_raw();
5207   return objArrayOop(base->obj_field(_static_cache_offset));
5208 }
5209 
5210 Symbol* java_lang_Short_ShortCache::symbol() {
5211   return vmSymbols::java_lang_Short_ShortCache();
5212 }
5213 
5214 #if INCLUDE_CDS
5215 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) {
5216   SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5217 }
5218 #endif
5219 #undef SHORT_CACHE_FIELDS_DO
5220 
5221 jshort java_lang_Short::value(oop obj) {
5222    jvalue v;
5223    java_lang_boxing_object::get_value(obj, &v);
5224    return v.s;
5225 }
5226 
5227 #define BYTE_CACHE_FIELDS_DO(macro) \
5228   macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true)
5229 
5230 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) {
5231   guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5232   BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5233 }
5234 
5235 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) {
5236   oop base = ik->static_field_base_raw();
5237   return objArrayOop(base->obj_field(_static_cache_offset));
5238 }
5239 
5240 Symbol* java_lang_Byte_ByteCache::symbol() {
5241   return vmSymbols::java_lang_Byte_ByteCache();
5242 }
5243 
5244 #if INCLUDE_CDS
5245 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) {
5246   BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5247 }
5248 #endif
5249 #undef BYTE_CACHE_FIELDS_DO
5250 
5251 jbyte java_lang_Byte::value(oop obj) {
5252    jvalue v;
5253    java_lang_boxing_object::get_value(obj, &v);
5254    return v.b;
5255 }
5256 
5257 int java_lang_Boolean::_static_TRUE_offset;
5258 int java_lang_Boolean::_static_FALSE_offset;
5259 
5260 #define BOOLEAN_FIELDS_DO(macro) \
5261   macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \
5262   macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true)
5263 
5264 
5265 void java_lang_Boolean::compute_offsets(InstanceKlass *k) {
5266   guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5267   BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5268 }
5269 
5270 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) {
5271   oop base = ik->static_field_base_raw();
5272   return base->obj_field(_static_TRUE_offset);
5273 }
5274 
5275 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) {
5276   oop base = ik->static_field_base_raw();
5277   return base->obj_field(_static_FALSE_offset);
5278 }
5279 
5280 Symbol* java_lang_Boolean::symbol() {
5281   return vmSymbols::java_lang_Boolean();
5282 }
5283 
5284 #if INCLUDE_CDS
5285 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) {
5286   BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5287 }
5288 #endif
5289 #undef BOOLEAN_CACHE_FIELDS_DO
5290 
5291 jboolean java_lang_Boolean::value(oop obj) {
5292    jvalue v;
5293    java_lang_boxing_object::get_value(obj, &v);
5294    return v.z;
5295 }
5296 
5297 // java_lang_reflect_RecordComponent
5298 
5299 int java_lang_reflect_RecordComponent::_clazz_offset;
5300 int java_lang_reflect_RecordComponent::_name_offset;
5301 int java_lang_reflect_RecordComponent::_type_offset;
5302 int java_lang_reflect_RecordComponent::_accessor_offset;
5303 int java_lang_reflect_RecordComponent::_signature_offset;
5304 int java_lang_reflect_RecordComponent::_annotations_offset;
5305 int java_lang_reflect_RecordComponent::_typeAnnotations_offset;
5306 
5307 #define RECORDCOMPONENT_FIELDS_DO(macro) \
5308   macro(_clazz_offset,       k, "clazz",       class_signature,  false); \
5309   macro(_name_offset,        k, "name",        string_signature, false); \
5310   macro(_type_offset,        k, "type",        class_signature,  false); \
5311   macro(_accessor_offset,    k, "accessor",    reflect_method_signature, false); \
5312   macro(_signature_offset,   k, "signature",   string_signature, false); \
5313   macro(_annotations_offset, k, "annotations", byte_array_signature,     false); \
5314   macro(_typeAnnotations_offset, k, "typeAnnotations", byte_array_signature, false);
5315 
5316 // Support for java_lang_reflect_RecordComponent
5317 void java_lang_reflect_RecordComponent::compute_offsets() {
5318   InstanceKlass* k = vmClasses::RecordComponent_klass();
5319   RECORDCOMPONENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5320 }
5321 
5322 #if INCLUDE_CDS
5323 void java_lang_reflect_RecordComponent::serialize_offsets(SerializeClosure* f) {
5324   RECORDCOMPONENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5325 }
5326 #endif
5327 
5328 void java_lang_reflect_RecordComponent::set_clazz(oop element, oop value) {
5329   element->obj_field_put(_clazz_offset, value);
5330 }
5331 
5332 void java_lang_reflect_RecordComponent::set_name(oop element, oop value) {
5333   element->obj_field_put(_name_offset, value);
5334 }
5335 
5336 void java_lang_reflect_RecordComponent::set_type(oop element, oop value) {
5337   element->obj_field_put(_type_offset, value);
5338 }
5339 
5340 void java_lang_reflect_RecordComponent::set_accessor(oop element, oop value) {
5341   element->obj_field_put(_accessor_offset, value);
5342 }
5343 
5344 void java_lang_reflect_RecordComponent::set_signature(oop element, oop value) {
5345   element->obj_field_put(_signature_offset, value);
5346 }
5347 
5348 void java_lang_reflect_RecordComponent::set_annotations(oop element, oop value) {
5349   element->obj_field_put(_annotations_offset, value);
5350 }
5351 
5352 void java_lang_reflect_RecordComponent::set_typeAnnotations(oop element, oop value) {
5353   element->obj_field_put(_typeAnnotations_offset, value);
5354 }
5355 
5356 // java_lang_InternalError
5357 int java_lang_InternalError::_during_unsafe_access_offset;
5358 
5359 void java_lang_InternalError::set_during_unsafe_access(oop internal_error) {
5360   internal_error->bool_field_put(_during_unsafe_access_offset, true);
5361 }
5362 
5363 jboolean java_lang_InternalError::during_unsafe_access(oop internal_error) {
5364   return internal_error->bool_field(_during_unsafe_access_offset);
5365 }
5366 
5367 void java_lang_InternalError::compute_offsets() {
5368   INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
5369 }
5370 
5371 #if INCLUDE_CDS
5372 void java_lang_InternalError::serialize_offsets(SerializeClosure* f) {
5373   INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
5374 }
5375 #endif
5376 
5377 #define BASIC_JAVA_CLASSES_DO_PART1(f) \
5378   f(java_lang_Class) \
5379   f(java_lang_String) \
5380   f(java_lang_ref_Reference) \
5381   //end
5382 
5383 #define BASIC_JAVA_CLASSES_DO_PART2(f) \
5384   f(java_lang_System) \
5385   f(java_lang_ClassLoader) \
5386   f(java_lang_Throwable) \
5387   f(java_lang_Thread) \
5388   f(java_lang_Thread_FieldHolder) \
5389   f(java_lang_Thread_Constants) \
5390   f(java_lang_ThreadGroup) \
5391   f(java_lang_VirtualThread) \
5392   f(java_lang_InternalError) \
5393   f(java_lang_AssertionStatusDirectives) \
5394   f(java_lang_ref_SoftReference) \
5395   f(java_lang_invoke_MethodHandle) \
5396   f(java_lang_invoke_DirectMethodHandle) \
5397   f(java_lang_invoke_MemberName) \
5398   f(java_lang_invoke_ResolvedMethodName) \
5399   f(java_lang_invoke_LambdaForm) \
5400   f(java_lang_invoke_MethodType) \
5401   f(java_lang_invoke_CallSite) \
5402   f(java_lang_invoke_ConstantCallSite) \
5403   f(java_lang_invoke_MethodHandleNatives_CallSiteContext) \
5404   f(java_lang_reflect_AccessibleObject) \
5405   f(java_lang_reflect_Method) \
5406   f(java_lang_reflect_Constructor) \
5407   f(java_lang_reflect_Field) \
5408   f(java_lang_reflect_RecordComponent) \
5409   f(reflect_ConstantPool) \
5410   f(java_lang_reflect_Parameter) \
5411   f(java_lang_Module) \
5412   f(java_lang_StackTraceElement) \
5413   f(java_lang_ClassFrameInfo) \
5414   f(java_lang_StackFrameInfo) \
5415   f(java_lang_LiveStackFrameInfo) \
5416   f(jdk_internal_vm_ContinuationScope) \
5417   f(jdk_internal_vm_Continuation) \
5418   f(jdk_internal_vm_StackChunk) \
5419   f(java_util_concurrent_locks_AbstractOwnableSynchronizer) \
5420   f(jdk_internal_foreign_abi_NativeEntryPoint) \
5421   f(jdk_internal_foreign_abi_ABIDescriptor) \
5422   f(jdk_internal_foreign_abi_VMStorage) \
5423   f(jdk_internal_foreign_abi_CallConv) \
5424   f(jdk_internal_misc_UnsafeConstants) \
5425   f(java_lang_boxing_object) \
5426   f(vector_VectorPayload) \
5427   //end
5428 
5429 #define BASIC_JAVA_CLASSES_DO(f) \
5430         BASIC_JAVA_CLASSES_DO_PART1(f) \
5431         BASIC_JAVA_CLASSES_DO_PART2(f)
5432 
5433 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
5434 
5435 // Compute field offsets of all the classes in this file
5436 void JavaClasses::compute_offsets() {
5437   if (CDSConfig::is_using_archive()) {
5438     JVMTI_ONLY(assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
5439                                                          JvmtiExport::has_early_class_hook_env()),
5440                       "JavaClasses::compute_offsets() must be called in early JVMTI phase."));
5441     // None of the classes used by the rest of this function can be replaced by
5442     // JVMTI ClassFileLoadHook.
5443     // We are safe to use the archived offsets, which have already been restored
5444     // by JavaClasses::serialize_offsets, without computing the offsets again.
5445     return;
5446   }
5447 
5448   // We have already called the compute_offsets() of the
5449   // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String, java_lang_Class and
5450   // java_lang_ref_Reference) earlier inside vmClasses::resolve_all()
5451   BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
5452 }
5453 
5454 #if INCLUDE_CDS
5455 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
5456 
5457 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
5458   BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
5459 }
5460 #endif
5461 
5462 #if INCLUDE_CDS_JAVA_HEAP
5463 bool JavaClasses::is_supported_for_archiving(oop obj) {
5464   Klass* klass = obj->klass();
5465 
5466   if (!CDSConfig::is_dumping_invokedynamic()) {
5467     // These are supported by CDS only when CDSConfig::is_dumping_invokedynamic() is enabled.
5468     if (klass == vmClasses::ResolvedMethodName_klass() ||
5469         klass == vmClasses::MemberName_klass() ||
5470         klass == vmClasses::Context_klass()) {
5471       return false;
5472     }
5473   }
5474 
5475   if (klass->is_subclass_of(vmClasses::Reference_klass())) {
5476     // It's problematic to archive Reference objects. One of the reasons is that
5477     // Reference::discovered may pull in unwanted objects (see JDK-8284336)
5478     return false;
5479   }
5480 
5481   return true;
5482 }
5483 #endif
5484 
5485 #ifndef PRODUCT
5486 
5487 // These functions exist to assert the validity of de-serialized offsets in boxing object as a sanity check.
5488 
5489 bool JavaClasses::check_offset(const char *klass_name, int deserialized_offset, const char *field_name,
5490                                const char* field_sig) {
5491   EXCEPTION_MARK;
5492   fieldDescriptor fd;
5493   TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name);
5494   Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
5495   InstanceKlass* ik = InstanceKlass::cast(k);
5496   TempNewSymbol f_name = SymbolTable::new_symbol(field_name);
5497   TempNewSymbol f_sig  = SymbolTable::new_symbol(field_sig);
5498   if (!ik->find_local_field(f_name, f_sig, &fd)) {
5499     tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
5500     return false;
5501   }
5502   if (fd.is_static()) {
5503     tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
5504     return false;
5505   }
5506   if (fd.offset() == deserialized_offset ) {
5507     return true;
5508   } else {
5509     tty->print_cr("Offset of nonstatic field %s.%s is deserialized as %d but should really be %d.",
5510                   klass_name, field_name, deserialized_offset, fd.offset());
5511     return false;
5512   }
5513 }
5514 
5515 void JavaClasses::check_offsets() {
5516   bool valid = true;
5517 
5518 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5519   valid &= check_offset(klass_name, cpp_klass_name :: _##field_name ## _offset, #field_name, field_sig)
5520 
5521 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5522   valid &= check_offset(klass_name, cpp_klass_name :: _##long_ ## field_name ## _offset, #field_name, field_sig)
5523 
5524   // Boxed primitive objects (java_lang_boxing_object)
5525 
5526   CHECK_OFFSET("java/lang/Boolean",   java_lang_boxing_object, value, "Z");
5527   CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
5528   if (Arguments::enable_preview() && UseNullableValueFlattening && UseFieldFlattening) {
5529     CHECK_LONG_OFFSET("java/lang/Float",     java_lang_boxing_object, value, "F");
5530   } else {
5531     CHECK_OFFSET("java/lang/Float",     java_lang_boxing_object, value, "F");
5532   }
5533   CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
5534   CHECK_OFFSET("java/lang/Byte",      java_lang_boxing_object, value, "B");
5535   CHECK_OFFSET("java/lang/Short",     java_lang_boxing_object, value, "S");
5536   if (Arguments::enable_preview() && UseNullableValueFlattening && UseFieldFlattening) {
5537     CHECK_LONG_OFFSET("java/lang/Integer",   java_lang_boxing_object, value, "I");
5538   } else {
5539     CHECK_OFFSET("java/lang/Integer",   java_lang_boxing_object, value, "I");
5540   }
5541   CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
5542 
5543   if (!valid) vm_exit_during_initialization("Field offset verification failed");
5544 }
5545 
5546 #endif // PRODUCT
5547 
5548 int InjectedField::compute_offset() {
5549   InstanceKlass* ik = InstanceKlass::cast(klass());
5550   for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5551     if (!may_be_java && !fs.field_flags().is_injected()) {
5552       // Only look at injected fields
5553       continue;
5554     }
5555     if (fs.name() == name() && fs.signature() == signature()) {
5556       return fs.offset();
5557     }
5558   }
5559   ResourceMark rm;
5560   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)" : "");
5561 #ifndef PRODUCT
5562   ik->print();
5563   tty->print_cr("all fields:");
5564   for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5565     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());
5566   }
5567 #endif //PRODUCT
5568   vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
5569   return -1;
5570 }
5571 
5572 void javaClasses_init() {
5573   JavaClasses::compute_offsets();
5574   JavaClasses::check_offsets();
5575   FilteredFieldsMap::initialize();  // must be done after computing offsets.
5576 }
--- EOF ---