1 /*
   2  * Copyright (c) 1997, 2023, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "precompiled.hpp"
  26 #include "cds/archiveBuilder.hpp"
  27 #include "cds/archiveHeapLoader.hpp"
  28 #include "cds/cdsConfig.hpp"
  29 #include "cds/heapShared.hpp"
  30 #include "cds/metaspaceShared.hpp"
  31 #include "classfile/altHashing.hpp"
  32 #include "classfile/classLoaderData.inline.hpp"
  33 #include "classfile/javaClasses.inline.hpp"
  34 #include "classfile/javaClassesImpl.hpp"
  35 #include "classfile/javaThreadStatus.hpp"
  36 #include "classfile/moduleEntry.hpp"
  37 #include "classfile/stringTable.hpp"
  38 #include "classfile/symbolTable.hpp"
  39 #include "classfile/systemDictionary.hpp"
  40 #include "classfile/vmClasses.hpp"
  41 #include "classfile/vmSymbols.hpp"
  42 #include "code/debugInfo.hpp"
  43 #include "code/dependencyContext.hpp"
  44 #include "code/pcDesc.hpp"
  45 #include "gc/shared/collectedHeap.inline.hpp"
  46 #include "interpreter/interpreter.hpp"
  47 #include "interpreter/linkResolver.hpp"
  48 #include "jvm.h"
  49 #include "logging/log.hpp"
  50 #include "logging/logStream.hpp"
  51 #include "memory/oopFactory.hpp"
  52 #include "memory/resourceArea.hpp"
  53 #include "memory/universe.hpp"
  54 #include "oops/fieldInfo.hpp"
  55 #include "oops/fieldStreams.inline.hpp"
  56 #include "oops/instanceKlass.inline.hpp"
  57 #include "oops/instanceMirrorKlass.hpp"
  58 #include "oops/klass.hpp"
  59 #include "oops/klass.inline.hpp"
  60 #include "oops/method.inline.hpp"
  61 #include "oops/objArrayKlass.hpp"
  62 #include "oops/objArrayOop.inline.hpp"
  63 #include "oops/oopCast.inline.hpp"
  64 #include "oops/oop.inline.hpp"
  65 #include "oops/symbol.hpp"
  66 #include "oops/recordComponent.hpp"
  67 #include "oops/typeArrayOop.inline.hpp"
  68 #include "prims/jvmtiExport.hpp"
  69 #include "prims/methodHandles.hpp"
  70 #include "prims/resolvedMethodTable.hpp"
  71 #include "runtime/continuationEntry.inline.hpp"
  72 #include "runtime/continuationJavaClasses.inline.hpp"
  73 #include "runtime/fieldDescriptor.inline.hpp"
  74 #include "runtime/frame.inline.hpp"
  75 #include "runtime/handles.inline.hpp"
  76 #include "runtime/handshake.hpp"
  77 #include "runtime/init.hpp"
  78 #include "runtime/interfaceSupport.inline.hpp"
  79 #include "runtime/java.hpp"
  80 #include "runtime/javaCalls.hpp"
  81 #include "runtime/javaThread.hpp"
  82 #include "runtime/jniHandles.inline.hpp"
  83 #include "runtime/reflectionUtils.hpp"
  84 #include "runtime/safepoint.hpp"
  85 #include "runtime/safepointVerifiers.hpp"
  86 #include "runtime/threadSMR.hpp"
  87 #include "runtime/vframe.inline.hpp"
  88 #include "runtime/vm_version.hpp"
  89 #include "utilities/align.hpp"
  90 #include "utilities/globalDefinitions.hpp"
  91 #include "utilities/growableArray.hpp"
  92 #include "utilities/preserveException.hpp"
  93 #include "utilities/utf8.hpp"
  94 #if INCLUDE_JVMCI
  95 #include "jvmci/jvmciJavaClasses.hpp"
  96 #endif
  97 
  98 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java)           \
  99   { VM_CLASS_ID(klass), VM_SYMBOL_ENUM_NAME(name##_name), VM_SYMBOL_ENUM_NAME(signature), may_be_java },
 100 
 101 InjectedField JavaClasses::_injected_fields[] = {
 102   ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
 103 };
 104 
 105 // Register native methods of Object
 106 void java_lang_Object::register_natives(TRAPS) {
 107   InstanceKlass* obj = vmClasses::Object_klass();
 108   Method::register_native(obj, vmSymbols::hashCode_name(),
 109                           vmSymbols::void_int_signature(), (address) &JVM_IHashCode, CHECK);
 110   Method::register_native(obj, vmSymbols::wait_name(),
 111                           vmSymbols::long_void_signature(), (address) &JVM_MonitorWait, CHECK);
 112   Method::register_native(obj, vmSymbols::notify_name(),
 113                           vmSymbols::void_method_signature(), (address) &JVM_MonitorNotify, CHECK);
 114   Method::register_native(obj, vmSymbols::notifyAll_name(),
 115                           vmSymbols::void_method_signature(), (address) &JVM_MonitorNotifyAll, CHECK);
 116   Method::register_native(obj, vmSymbols::clone_name(),
 117                           vmSymbols::void_object_signature(), (address) &JVM_Clone, THREAD);
 118 }
 119 
 120 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
 121   return _injected_fields[(int)id].compute_offset();
 122 }
 123 
 124 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
 125   *field_count = 0;
 126 
 127   vmSymbolID sid = vmSymbols::find_sid(class_name);
 128   if (sid == vmSymbolID::NO_SID) {
 129     // Only well known classes can inject fields
 130     return nullptr;
 131   }
 132 
 133   int count = 0;
 134   int start = -1;
 135 
 136 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
 137   if (sid == VM_SYMBOL_ENUM_NAME(klass)) {                         \
 138     count++;                                                       \
 139     if (start == -1) {                                             \
 140       start = (int)InjectedFieldID::klass##_##name##_enum;         \
 141     }                                                              \
 142   }
 143   ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
 144 #undef LOOKUP_INJECTED_FIELD
 145 
 146   if (start != -1) {
 147     *field_count = count;
 148     return _injected_fields + start;
 149   }
 150   return nullptr;
 151 }
 152 
 153 
 154 // Helpful routine for computing field offsets at run time rather than hardcoding them
 155 // Finds local fields only, including static fields.  Static field offsets are from the
 156 // beginning of the mirror.
 157 void JavaClasses::compute_offset(int &dest_offset,
 158                                  InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
 159                                  bool is_static) {
 160   fieldDescriptor fd;
 161   if (ik == nullptr) {
 162     ResourceMark rm;
 163     log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string());
 164     vm_exit_during_initialization("Invalid layout of well-known class");
 165   }
 166 
 167   if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) {
 168     ResourceMark rm;
 169     log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(),
 170                      name_symbol->as_C_string(), signature_symbol->as_C_string());
 171 #ifndef PRODUCT
 172     // Prints all fields and offsets
 173     Log(class) lt;
 174     LogStream ls(lt.error());
 175     ik->print_on(&ls);
 176 #endif //PRODUCT
 177     vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
 178   }
 179   dest_offset = fd.offset();
 180 }
 181 
 182 // Overloading to pass name as a string.
 183 void JavaClasses::compute_offset(int& dest_offset, InstanceKlass* ik,
 184                                  const char* name_string, Symbol* signature_symbol,
 185                                  bool is_static) {
 186   TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string));
 187   if (name == nullptr) {
 188     ResourceMark rm;
 189     log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string);
 190     vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name());
 191   }
 192   compute_offset(dest_offset, ik, name, signature_symbol, is_static);
 193 }
 194 
 195 // java_lang_String
 196 
 197 int java_lang_String::_value_offset;
 198 int java_lang_String::_hash_offset;
 199 int java_lang_String::_hashIsZero_offset;
 200 int java_lang_String::_coder_offset;
 201 int java_lang_String::_flags_offset;
 202 
 203 bool java_lang_String::_initialized;
 204 
 205 
 206 bool java_lang_String::test_and_set_flag(oop java_string, uint8_t flag_mask) {
 207   uint8_t* addr = flags_addr(java_string);
 208   uint8_t value = Atomic::load(addr);
 209   while ((value & flag_mask) == 0) {
 210     uint8_t old_value = value;
 211     value |= flag_mask;
 212     value = Atomic::cmpxchg(addr, old_value, value);
 213     if (value == old_value) return false; // Flag bit changed from 0 to 1.
 214   }
 215   return true;                  // Flag bit is already 1.
 216 }
 217 
 218 #define STRING_FIELDS_DO(macro) \
 219   macro(_value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \
 220   macro(_hash_offset,  k, "hash",                  int_signature,        false); \
 221   macro(_hashIsZero_offset, k, "hashIsZero",       bool_signature,       false); \
 222   macro(_coder_offset, k, "coder",                 byte_signature,       false);
 223 
 224 void java_lang_String::compute_offsets() {
 225   if (_initialized) {
 226     return;
 227   }
 228 
 229   InstanceKlass* k = vmClasses::String_klass();
 230   STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
 231   STRING_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
 232 
 233   _initialized = true;
 234 }
 235 
 236 #if INCLUDE_CDS
 237 void java_lang_String::serialize_offsets(SerializeClosure* f) {
 238   STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
 239   STRING_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
 240   f->do_bool(&_initialized);
 241 }
 242 #endif
 243 
 244 class CompactStringsFixup : public FieldClosure {
 245 private:
 246   bool _value;
 247 
 248 public:
 249   CompactStringsFixup(bool value) : _value(value) {}
 250 
 251   void do_field(fieldDescriptor* fd) {
 252     if (fd->name() == vmSymbols::compact_strings_name()) {
 253       oop mirror = fd->field_holder()->java_mirror();
 254       assert(fd->field_holder() == vmClasses::String_klass(), "Should be String");
 255       assert(mirror != nullptr, "String must have mirror already");
 256       mirror->bool_field_put(fd->offset(), _value);
 257     }
 258   }
 259 };
 260 
 261 void java_lang_String::set_compact_strings(bool value) {
 262   CompactStringsFixup fix(value);
 263   vmClasses::String_klass()->do_local_static_fields(&fix);
 264 }
 265 
 266 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
 267   assert(_initialized, "Must be initialized");
 268   assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
 269 
 270   // Create the String object first, so there's a chance that the String
 271   // and the char array it points to end up in the same cache line.
 272   oop obj;
 273   obj = vmClasses::String_klass()->allocate_instance(CHECK_NH);
 274 
 275   // Create the char array.  The String object must be handlized here
 276   // because GC can happen as a result of the allocation attempt.
 277   Handle h_obj(THREAD, obj);
 278   int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
 279   typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
 280 
 281   // Point the String at the char array
 282   obj = h_obj();
 283   set_value(obj, buffer);
 284   // No need to zero the offset, allocation zero'ed the entire String object
 285   set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
 286   return h_obj;
 287 }
 288 
 289 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) {
 290   bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
 291   Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
 292   typeArrayOop buffer = value(h_obj());
 293   assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
 294   if (is_latin1) {
 295     for (int index = 0; index < length; index++) {
 296       buffer->byte_at_put(index, (jbyte)unicode[index]);
 297     }
 298   } else {
 299     for (int index = 0; index < length; index++) {
 300       buffer->char_at_put(index, unicode[index]);
 301     }
 302   }
 303 
 304 #ifdef ASSERT
 305   {
 306     ResourceMark rm;
 307     char* expected = UNICODE::as_utf8(unicode, length);
 308     char* actual = as_utf8_string(h_obj());
 309     if (strcmp(expected, actual) != 0) {
 310       fatal("Unicode conversion failure: %s --> %s", expected, actual);
 311     }
 312   }
 313 #endif
 314 
 315   return h_obj;
 316 }
 317 
 318 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) {
 319   Handle h_obj = create_from_unicode(unicode, length, CHECK_NULL);
 320   return h_obj();
 321 }
 322 
 323 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
 324   if (utf8_str == nullptr) {
 325     return Handle();
 326   }
 327   bool has_multibyte, is_latin1;
 328   int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
 329   if (!CompactStrings) {
 330     has_multibyte = true;
 331     is_latin1 = false;
 332   }
 333 
 334   Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
 335   if (length > 0) {
 336     if (!has_multibyte) {
 337       const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
 338       ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
 339     } else if (is_latin1) {
 340       UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
 341     } else {
 342       UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
 343     }
 344   }
 345 
 346 #ifdef ASSERT
 347   // This check is too strict when the input string is not a valid UTF8.
 348   // For example, it may be created with arbitrary content via jni_NewStringUTF.
 349   if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, (int)strlen(utf8_str), false)) {
 350     ResourceMark rm;
 351     const char* expected = utf8_str;
 352     char* actual = as_utf8_string(h_obj());
 353     if (strcmp(expected, actual) != 0) {
 354       fatal("String conversion failure: %s --> %s", expected, actual);
 355     }
 356   }
 357 #endif
 358 
 359   return h_obj;
 360 }
 361 
 362 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
 363   Handle h_obj = create_from_str(utf8_str, CHECK_NULL);
 364   return h_obj();
 365 }
 366 
 367 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
 368   const char* utf8_str = (char*)symbol->bytes();
 369   int utf8_len = symbol->utf8_length();
 370 
 371   bool has_multibyte, is_latin1;
 372   int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
 373   if (!CompactStrings) {
 374     has_multibyte = true;
 375     is_latin1 = false;
 376   }
 377 
 378   Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
 379   if (length > 0) {
 380     if (!has_multibyte) {
 381       const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
 382       ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
 383     } else if (is_latin1) {
 384       UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
 385     } else {
 386       UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
 387     }
 388   }
 389 
 390 #ifdef ASSERT
 391   {
 392     ResourceMark rm;
 393     const char* expected = symbol->as_utf8();
 394     char* actual = as_utf8_string(h_obj());
 395     if (strncmp(expected, actual, utf8_len) != 0) {
 396       fatal("Symbol conversion failure: %s --> %s", expected, actual);
 397     }
 398   }
 399 #endif
 400 
 401   return h_obj;
 402 }
 403 
 404 // Converts a C string to a Java String based on current encoding
 405 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
 406   assert(str != nullptr, "bad arguments");
 407 
 408   typedef jstring (JNICALL *to_java_string_fn_t)(JNIEnv*, const char *);
 409   static to_java_string_fn_t _to_java_string_fn = nullptr;
 410 
 411   if (_to_java_string_fn == nullptr) {
 412     void *lib_handle = os::native_java_library();
 413     _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "JNU_NewStringPlatform"));
 414 #if defined(_WIN32) && !defined(_WIN64)
 415     if (_to_java_string_fn == nullptr) {
 416       // On 32 bit Windows, also try __stdcall decorated name
 417       _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "_JNU_NewStringPlatform@8"));
 418     }
 419 #endif
 420     if (_to_java_string_fn == nullptr) {
 421       fatal("JNU_NewStringPlatform missing");
 422     }
 423   }
 424 
 425   jstring js = nullptr;
 426   {
 427     JavaThread* thread = THREAD;
 428     HandleMark hm(thread);
 429     ThreadToNativeFromVM ttn(thread);
 430     js = (_to_java_string_fn)(thread->jni_environment(), str);
 431   }
 432 
 433   Handle native_platform_string(THREAD, JNIHandles::resolve(js));
 434   JNIHandles::destroy_local(js);  // destroy local JNIHandle.
 435   return native_platform_string;
 436 }
 437 
 438 // Converts a Java String to a native C string that can be used for
 439 // native OS calls.
 440 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
 441   typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
 442   static to_platform_string_fn_t _to_platform_string_fn = nullptr;
 443 
 444   if (_to_platform_string_fn == nullptr) {
 445     void *lib_handle = os::native_java_library();
 446     _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
 447     if (_to_platform_string_fn == nullptr) {
 448       fatal("GetStringPlatformChars missing");
 449     }
 450   }
 451 
 452   char *native_platform_string;
 453   jstring js;
 454   { JavaThread* thread = THREAD;
 455     js = (jstring) JNIHandles::make_local(thread, java_string());
 456     HandleMark hm(thread);
 457     ThreadToNativeFromVM ttn(thread);
 458     JNIEnv *env = thread->jni_environment();
 459     bool is_copy;
 460     native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
 461     assert(is_copy == JNI_TRUE, "is_copy value changed");
 462   }
 463 
 464   // Uses a store barrier and therefore needs to be in vm state
 465   JNIHandles::destroy_local(js);
 466 
 467   return native_platform_string;
 468 }
 469 
 470 Handle java_lang_String::externalize_classname(Symbol* java_name, TRAPS) {
 471   ResourceMark rm(THREAD);
 472   return create_from_str(java_name->as_klass_external_name(), THREAD);
 473 }
 474 
 475 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
 476   jchar* result = as_unicode_string_or_null(java_string, length);
 477   if (result == nullptr) {
 478     THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
 479   }
 480   return result;
 481 }
 482 
 483 jchar* java_lang_String::as_unicode_string_or_null(oop java_string, int& length) {
 484   typeArrayOop value  = java_lang_String::value(java_string);
 485                length = java_lang_String::length(java_string, value);
 486   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 487 
 488   jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
 489   if (result != nullptr) {
 490     if (!is_latin1) {
 491       for (int index = 0; index < length; index++) {
 492         result[index] = value->char_at(index);
 493       }
 494     } else {
 495       for (int index = 0; index < length; index++) {
 496         result[index] = ((jchar) value->byte_at(index)) & 0xff;
 497       }
 498     }
 499   }
 500   return result;
 501 }
 502 
 503 inline unsigned int java_lang_String::hash_code_impl(oop java_string, bool update) {
 504   // The hash and hashIsZero fields are subject to a benign data race,
 505   // making it crucial to ensure that any observable result of the
 506   // calculation in this method stays correct under any possible read of
 507   // these fields. Necessary restrictions to allow this to be correct
 508   // without explicit memory fences or similar concurrency primitives is
 509   // that we can ever only write to one of these two fields for a given
 510   // String instance, and that the computation is idempotent and derived
 511   // from immutable state
 512   assert(_initialized && (_hash_offset > 0) && (_hashIsZero_offset > 0), "Must be initialized");
 513   if (java_lang_String::hash_is_set(java_string)) {
 514     return java_string->int_field(_hash_offset);
 515   }
 516 
 517   typeArrayOop value = java_lang_String::value(java_string);
 518   int         length = java_lang_String::length(java_string, value);
 519   bool     is_latin1 = java_lang_String::is_latin1(java_string);
 520 
 521   unsigned int hash = 0;
 522   if (length > 0) {
 523     if (is_latin1) {
 524       hash = java_lang_String::hash_code(value->byte_at_addr(0), length);
 525     } else {
 526       hash = java_lang_String::hash_code(value->char_at_addr(0), length);
 527     }
 528   }
 529 
 530   if (update) {
 531     if (hash != 0) {
 532       java_string->int_field_put(_hash_offset, hash);
 533     } else {
 534       java_string->bool_field_put(_hashIsZero_offset, true);
 535     }
 536   }
 537   return hash;
 538 }
 539 
 540 unsigned int java_lang_String::hash_code(oop java_string) {
 541   return hash_code_impl(java_string, /*update=*/true);
 542 }
 543 
 544 unsigned int java_lang_String::hash_code_noupdate(oop java_string) {
 545   return hash_code_impl(java_string, /*update=*/false);
 546 }
 547 
 548 
 549 char* java_lang_String::as_quoted_ascii(oop java_string) {
 550   typeArrayOop value  = java_lang_String::value(java_string);
 551   int          length = java_lang_String::length(java_string, value);
 552   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 553 
 554   if (length == 0) return nullptr;
 555 
 556   char* result;
 557   int result_length;
 558   if (!is_latin1) {
 559     jchar* base = value->char_at_addr(0);
 560     result_length = UNICODE::quoted_ascii_length(base, length) + 1;
 561     result = NEW_RESOURCE_ARRAY(char, result_length);
 562     UNICODE::as_quoted_ascii(base, length, result, result_length);
 563   } else {
 564     jbyte* base = value->byte_at_addr(0);
 565     result_length = UNICODE::quoted_ascii_length(base, length) + 1;
 566     result = NEW_RESOURCE_ARRAY(char, result_length);
 567     UNICODE::as_quoted_ascii(base, length, result, result_length);
 568   }
 569   assert(result_length >= length + 1, "must not be shorter");
 570   assert(result_length == (int)strlen(result) + 1, "must match");
 571   return result;
 572 }
 573 
 574 Symbol* java_lang_String::as_symbol(oop java_string) {
 575   typeArrayOop value  = java_lang_String::value(java_string);
 576   int          length = java_lang_String::length(java_string, value);
 577   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 578   if (!is_latin1) {
 579     jchar* base = (length == 0) ? nullptr : value->char_at_addr(0);
 580     Symbol* sym = SymbolTable::new_symbol(base, length);
 581     return sym;
 582   } else {
 583     ResourceMark rm;
 584     jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
 585     const char* base = UNICODE::as_utf8(position, length);
 586     Symbol* sym = SymbolTable::new_symbol(base, length);
 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     const char* base = UNICODE::as_utf8(position, length);
 602     return SymbolTable::probe(base, length);
 603   }
 604 }
 605 
 606 int java_lang_String::utf8_length(oop java_string, typeArrayOop value) {
 607   assert(value_equals(value, java_lang_String::value(java_string)),
 608          "value must be same as java_lang_String::value(java_string)");
 609   int length = java_lang_String::length(java_string, value);
 610   if (length == 0) {
 611     return 0;
 612   }
 613   if (!java_lang_String::is_latin1(java_string)) {
 614     return UNICODE::utf8_length(value->char_at_addr(0), length);
 615   } else {
 616     return UNICODE::utf8_length(value->byte_at_addr(0), length);
 617   }
 618 }
 619 
 620 int java_lang_String::utf8_length(oop java_string) {
 621   typeArrayOop value = java_lang_String::value(java_string);
 622   return utf8_length(java_string, value);
 623 }
 624 
 625 char* java_lang_String::as_utf8_string(oop java_string) {
 626   int length;
 627   return as_utf8_string(java_string, length);
 628 }
 629 
 630 char* java_lang_String::as_utf8_string(oop java_string, int& length) {
 631   typeArrayOop value = java_lang_String::value(java_string);
 632   length             = java_lang_String::length(java_string, value);
 633   bool     is_latin1 = java_lang_String::is_latin1(java_string);
 634   if (!is_latin1) {
 635     jchar* position = (length == 0) ? nullptr : value->char_at_addr(0);
 636     return UNICODE::as_utf8(position, length);
 637   } else {
 638     jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
 639     return UNICODE::as_utf8(position, length);
 640   }
 641 }
 642 
 643 // Uses a provided buffer if it's sufficiently large, otherwise allocates
 644 // a resource array to fit
 645 char* java_lang_String::as_utf8_string_full(oop java_string, char* buf, int buflen, int& utf8_len) {
 646   typeArrayOop value = java_lang_String::value(java_string);
 647   int            len = java_lang_String::length(java_string, value);
 648   bool     is_latin1 = java_lang_String::is_latin1(java_string);
 649   if (!is_latin1) {
 650     jchar *position = (len == 0) ? nullptr : value->char_at_addr(0);
 651     utf8_len = UNICODE::utf8_length(position, len);
 652     if (utf8_len >= buflen) {
 653       buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
 654     }
 655     return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
 656   } else {
 657     jbyte *position = (len == 0) ? nullptr : value->byte_at_addr(0);
 658     utf8_len = UNICODE::utf8_length(position, len);
 659     if (utf8_len >= buflen) {
 660       buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
 661     }
 662     return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
 663   }
 664 }
 665 
 666 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, int buflen) {
 667   assert(value_equals(value, java_lang_String::value(java_string)),
 668          "value must be same as java_lang_String::value(java_string)");
 669   int     length = 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 = (length == 0) ? nullptr : value->char_at_addr(0);
 673     return UNICODE::as_utf8(position, length, buf, buflen);
 674   } else {
 675     jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
 676     return UNICODE::as_utf8(position, length, buf, buflen);
 677   }
 678 }
 679 
 680 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
 681   typeArrayOop value = java_lang_String::value(java_string);
 682   return as_utf8_string(java_string, value, buf, buflen);
 683 }
 684 
 685 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
 686   typeArrayOop value  = java_lang_String::value(java_string);
 687   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 688   assert(start + len <= java_lang_String::length(java_string), "just checking");
 689   if (!is_latin1) {
 690     jchar* position = value->char_at_addr(start);
 691     return UNICODE::as_utf8(position, len);
 692   } else {
 693     jbyte* position = value->byte_at_addr(start);
 694     return UNICODE::as_utf8(position, len);
 695   }
 696 }
 697 
 698 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, int buflen) {
 699   assert(value_equals(value, java_lang_String::value(java_string)),
 700          "value must be same as java_lang_String::value(java_string)");
 701   assert(start + len <= java_lang_String::length(java_string), "just checking");
 702   bool is_latin1 = java_lang_String::is_latin1(java_string);
 703   if (!is_latin1) {
 704     jchar* position = value->char_at_addr(start);
 705     return UNICODE::as_utf8(position, len, buf, buflen);
 706   } else {
 707     jbyte* position = value->byte_at_addr(start);
 708     return UNICODE::as_utf8(position, len, buf, buflen);
 709   }
 710 }
 711 
 712 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) {
 713   assert(java_string->klass() == vmClasses::String_klass(),
 714          "must be java_string");
 715   typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
 716   int length = java_lang_String::length(java_string, value);
 717   if (length != len) {
 718     return false;
 719   }
 720   bool is_latin1 = java_lang_String::is_latin1(java_string);
 721   if (!is_latin1) {
 722     for (int i = 0; i < len; i++) {
 723       if (value->char_at(i) != chars[i]) {
 724         return false;
 725       }
 726     }
 727   } else {
 728     for (int i = 0; i < len; i++) {
 729       if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
 730         return false;
 731       }
 732     }
 733   }
 734   return true;
 735 }
 736 
 737 bool java_lang_String::equals(oop str1, oop str2) {
 738   assert(str1->klass() == vmClasses::String_klass(),
 739          "must be java String");
 740   assert(str2->klass() == vmClasses::String_klass(),
 741          "must be java String");
 742   typeArrayOop value1    = java_lang_String::value_no_keepalive(str1);
 743   bool         is_latin1 = java_lang_String::is_latin1(str1);
 744   typeArrayOop value2    = java_lang_String::value_no_keepalive(str2);
 745   bool         is_latin2 = java_lang_String::is_latin1(str2);
 746 
 747   if (is_latin1 != is_latin2) {
 748     // Strings with different coders are never equal.
 749     return false;
 750   }
 751   return value_equals(value1, value2);
 752 }
 753 
 754 void java_lang_String::print(oop java_string, outputStream* st) {
 755   assert(java_string->klass() == vmClasses::String_klass(), "must be java_string");
 756   typeArrayOop value  = java_lang_String::value_no_keepalive(java_string);
 757 
 758   if (value == nullptr) {
 759     // This can happen if, e.g., printing a String
 760     // object before its initializer has been called
 761     st->print("nullptr");
 762     return;
 763   }
 764 
 765   int length = java_lang_String::length(java_string, value);
 766   bool is_latin1 = java_lang_String::is_latin1(java_string);
 767 
 768   st->print("\"");
 769   for (int index = 0; index < length; index++) {
 770     jchar c = (!is_latin1) ?  value->char_at(index) :
 771                              ((jchar) value->byte_at(index)) & 0xff;
 772     if (c < ' ') {
 773       st->print("\\x%02X", c); // print control characters e.g. \x0A
 774     } else {
 775       st->print("%c", c);
 776     }
 777   }
 778   st->print("\"");
 779 }
 780 
 781 // java_lang_Class
 782 
 783 int java_lang_Class::_klass_offset;
 784 int java_lang_Class::_array_klass_offset;
 785 int java_lang_Class::_oop_size_offset;
 786 int java_lang_Class::_static_oop_field_count_offset;
 787 int java_lang_Class::_class_loader_offset;
 788 int java_lang_Class::_module_offset;
 789 int java_lang_Class::_protection_domain_offset;
 790 int java_lang_Class::_component_mirror_offset;
 791 int java_lang_Class::_signers_offset;
 792 int java_lang_Class::_name_offset;
 793 int java_lang_Class::_source_file_offset;
 794 int java_lang_Class::_classData_offset;
 795 int java_lang_Class::_classRedefinedCount_offset;
 796 
 797 bool java_lang_Class::_offsets_computed = false;
 798 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = nullptr;
 799 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = nullptr;
 800 
 801 #ifdef ASSERT
 802 inline static void assert_valid_static_string_field(fieldDescriptor* fd) {
 803   assert(fd->has_initial_value(), "caller should have checked this");
 804   assert(fd->field_type() == T_OBJECT, "caller should have checked this");
 805   assert(fd->signature() == vmSymbols::string_signature(), "just checking");
 806 }
 807 #endif
 808 
 809 static void initialize_static_string_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
 810   DEBUG_ONLY(assert_valid_static_string_field(fd);)
 811   oop string = fd->string_initial_value(CHECK);
 812   mirror()->obj_field_put(fd->offset(), string);
 813 }
 814 
 815 static void initialize_static_primitive_field(fieldDescriptor* fd, Handle mirror) {
 816   assert(fd->has_initial_value(), "caller should have checked this");
 817   BasicType t = fd->field_type();
 818   switch (t) {
 819   case T_BYTE:
 820     mirror()->byte_field_put(fd->offset(), (jbyte)(fd->int_initial_value()));
 821     break;
 822   case T_BOOLEAN:
 823     mirror()->bool_field_put(fd->offset(), (jboolean)(fd->int_initial_value()));
 824     break;
 825   case T_CHAR:
 826     mirror()->char_field_put(fd->offset(), (jchar)(fd->int_initial_value()));
 827     break;
 828   case T_SHORT:
 829     mirror()->short_field_put(fd->offset(), (jshort)(fd->int_initial_value()));
 830     break;
 831   case T_INT:
 832     mirror()->int_field_put(fd->offset(), fd->int_initial_value());
 833     break;
 834   case T_FLOAT:
 835     mirror()->float_field_put(fd->offset(), fd->float_initial_value());
 836     break;
 837   case T_DOUBLE:
 838     mirror()->double_field_put(fd->offset(), fd->double_initial_value());
 839     break;
 840   case T_LONG:
 841     mirror()->long_field_put(fd->offset(), fd->long_initial_value());
 842     break;
 843   default:
 844     // Illegal ConstantValue attribute in class file should have been
 845     // caught during classfile parsing.
 846     ShouldNotReachHere();
 847   }
 848 }
 849 
 850 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
 851   assert(mirror.not_null() && fd->is_static(), "just checking");
 852   if (fd->has_initial_value()) {
 853     if (fd->field_type() != T_OBJECT) {
 854       initialize_static_primitive_field(fd, mirror);
 855     } else {
 856       initialize_static_string_field(fd, mirror, CHECK);
 857     }
 858   }
 859 }
 860 
 861 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
 862   assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
 863 
 864   // If the offset was read from the shared archive, it was fixed up already
 865   if (!k->is_shared()) {
 866     if (k->is_instance_klass()) {
 867       // During bootstrap, java.lang.Class wasn't loaded so static field
 868       // offsets were computed without the size added it.  Go back and
 869       // update all the static field offsets to included the size.
 870 
 871       // Unfortunately, the FieldInfo stream is encoded with UNSIGNED5 which doesn't allow
 872       // content updates. So the FieldInfo stream has to be decompressed into a temporary array,
 873       // static fields offsets are updated in this array before reencoding everything into
 874       // a new UNSIGNED5 stream, and substitute it to the old FieldInfo stream.
 875 
 876       int java_fields;
 877       int injected_fields;
 878       InstanceKlass* ik = InstanceKlass::cast(k);
 879       GrowableArray<FieldInfo>* fields =
 880         FieldInfoStream::create_FieldInfoArray(ik->fieldinfo_stream(),
 881                                                &java_fields, &injected_fields);
 882       for (int i = 0; i < fields->length(); i++) {
 883         FieldInfo* fi = fields->adr_at(i);
 884         if (fi->access_flags().is_static()) {
 885           fi->set_offset(fi->offset() + InstanceMirrorKlass::offset_of_static_fields());
 886         }
 887       }
 888       Array<u1>* old_stream = ik->fieldinfo_stream();
 889       assert(fields->length() == (java_fields + injected_fields), "Must be");
 890       Array<u1>* new_fis = FieldInfoStream::create_FieldInfoStream(fields, java_fields, injected_fields, k->class_loader_data(), CHECK);
 891       ik->set_fieldinfo_stream(new_fis);
 892       MetadataFactory::free_array<u1>(k->class_loader_data(), old_stream);
 893     }
 894   }
 895 
 896   if (k->is_shared() && k->has_archived_mirror_index()) {
 897     if (ArchiveHeapLoader::is_in_use()) {
 898       bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK);
 899       assert(present, "Missing archived mirror for %s", k->external_name());
 900       return;
 901     } else {
 902       k->clear_java_mirror_handle();
 903       k->clear_archived_mirror_index();
 904     }
 905   }
 906   create_mirror(k, Handle(), Handle(), Handle(), Handle(), CHECK);
 907 }
 908 
 909 void java_lang_Class::initialize_mirror_fields(Klass* k,
 910                                                Handle mirror,
 911                                                Handle protection_domain,
 912                                                Handle classData,
 913                                                TRAPS) {
 914   // Set protection domain also
 915   set_protection_domain(mirror(), protection_domain());
 916 
 917   // Initialize static fields
 918   InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK);
 919 
 920  // Set classData
 921   set_class_data(mirror(), classData());
 922 }
 923 
 924 // Set the java.lang.Module module field in the java_lang_Class mirror
 925 void java_lang_Class::set_mirror_module_field(JavaThread* current, Klass* k, Handle mirror, Handle module) {
 926   if (module.is_null()) {
 927     // During startup, the module may be null only if java.base has not been defined yet.
 928     // Put the class on the fixup_module_list to patch later when the java.lang.Module
 929     // for java.base is known. But note that since we captured the null module another
 930     // thread may have completed that initialization.
 931 
 932     bool javabase_was_defined = false;
 933     {
 934       MutexLocker m1(current, Module_lock);
 935       // Keep list of classes needing java.base module fixup
 936       if (!ModuleEntryTable::javabase_defined()) {
 937         assert(k->java_mirror() != nullptr, "Class's mirror is null");
 938         k->class_loader_data()->inc_keep_alive();
 939         assert(fixup_module_field_list() != nullptr, "fixup_module_field_list not initialized");
 940         fixup_module_field_list()->push(k);
 941       } else {
 942         javabase_was_defined = true;
 943       }
 944     }
 945 
 946     // If java.base was already defined then patch this particular class with java.base.
 947     if (javabase_was_defined) {
 948       ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
 949       assert(javabase_entry != nullptr && javabase_entry->module() != nullptr,
 950              "Setting class module field, " JAVA_BASE_NAME " should be defined");
 951       Handle javabase_handle(current, javabase_entry->module());
 952       set_module(mirror(), javabase_handle());
 953     }
 954   } else {
 955     assert(Universe::is_module_initialized() ||
 956            (ModuleEntryTable::javabase_defined() &&
 957             (module() == ModuleEntryTable::javabase_moduleEntry()->module())),
 958            "Incorrect java.lang.Module specification while creating mirror");
 959     set_module(mirror(), module());
 960   }
 961 }
 962 
 963 // Statically allocate fixup lists because they always get created.
 964 void java_lang_Class::allocate_fixup_lists() {
 965   GrowableArray<Klass*>* mirror_list =
 966     new (mtClass) GrowableArray<Klass*>(40, mtClass);
 967   set_fixup_mirror_list(mirror_list);
 968 
 969   GrowableArray<Klass*>* module_list =
 970     new (mtModule) GrowableArray<Klass*>(500, mtModule);
 971   set_fixup_module_field_list(module_list);
 972 }
 973 
 974 void java_lang_Class::allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData,
 975                                       Handle& mirror, Handle& comp_mirror, TRAPS) {
 976   // Allocate mirror (java.lang.Class instance)
 977   oop mirror_oop = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(k, CHECK);
 978   mirror = Handle(THREAD, mirror_oop);
 979 
 980   // Setup indirection from mirror->klass
 981   set_klass(mirror(), k);
 982 
 983   InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
 984   assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
 985 
 986   set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
 987 
 988   // It might also have a component mirror.  This mirror must already exist.
 989   if (k->is_array_klass()) {
 990     if (k->is_typeArray_klass()) {
 991       BasicType type = TypeArrayKlass::cast(k)->element_type();
 992       if (is_scratch) {
 993         comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(type));
 994       } else {
 995         comp_mirror = Handle(THREAD, Universe::java_mirror(type));
 996       }
 997     } else {
 998       assert(k->is_objArray_klass(), "Must be");
 999       Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1000       assert(element_klass != nullptr, "Must have an element klass");
1001       if (is_scratch) {
1002         comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass));
1003       } else {
1004         comp_mirror = Handle(THREAD, element_klass->java_mirror());
1005       }
1006     }
1007     assert(comp_mirror() != nullptr, "must have a mirror");
1008 
1009     // Two-way link between the array klass and its component mirror:
1010     // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
1011     set_component_mirror(mirror(), comp_mirror());
1012     // See below for ordering dependencies between field array_klass in component mirror
1013     // and java_mirror in this klass.
1014   } else {
1015     assert(k->is_instance_klass(), "Must be");
1016 
1017     initialize_mirror_fields(k, mirror, protection_domain, classData, THREAD);
1018     if (HAS_PENDING_EXCEPTION) {
1019       // If any of the fields throws an exception like OOM remove the klass field
1020       // from the mirror so GC doesn't follow it after the klass has been deallocated.
1021       // This mirror looks like a primitive type, which logically it is because it
1022       // it represents no class.
1023       set_klass(mirror(), nullptr);
1024       return;
1025     }
1026   }
1027 }
1028 
1029 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
1030                                     Handle module, Handle protection_domain,
1031                                     Handle classData, TRAPS) {
1032   assert(k != nullptr, "Use create_basic_type_mirror for primitive types");
1033   assert(k->java_mirror() == nullptr, "should only assign mirror once");
1034 
1035   // Use this moment of initialization to cache modifier_flags also,
1036   // to support Class.getModifiers().  Instance classes recalculate
1037   // the cached flags after the class file is parsed, but before the
1038   // class is put into the system dictionary.
1039   int computed_modifiers = k->compute_modifier_flags();
1040   k->set_modifier_flags(computed_modifiers);
1041   // Class_klass has to be loaded because it is used to allocate
1042   // the mirror.
1043   if (vmClasses::Class_klass_loaded()) {
1044     Handle mirror;
1045     Handle comp_mirror;
1046 
1047     allocate_mirror(k, /*is_scratch=*/false, protection_domain, classData, mirror, comp_mirror, CHECK);
1048 
1049     // set the classLoader field in the java_lang_Class instance
1050     assert(class_loader() == k->class_loader(), "should be same");
1051     set_class_loader(mirror(), class_loader());
1052 
1053     // Setup indirection from klass->mirror
1054     // after any exceptions can happen during allocations.
1055     k->set_java_mirror(mirror);
1056 
1057     // Set the module field in the java_lang_Class instance.  This must be done
1058     // after the mirror is set.
1059     set_mirror_module_field(THREAD, k, mirror, module);
1060 
1061     if (comp_mirror() != nullptr) {
1062       // Set after k->java_mirror() is published, because compiled code running
1063       // concurrently doesn't expect a k to have a null java_mirror.
1064       release_set_array_klass(comp_mirror(), k);
1065     }
1066     if (CDSConfig::is_dumping_heap()) {
1067       create_scratch_mirror(k, CHECK);
1068     }
1069   } else {
1070     assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1071     fixup_mirror_list()->push(k);
1072   }
1073 }
1074 
1075 #if INCLUDE_CDS_JAVA_HEAP
1076 // The "scratch mirror" stores the states of the mirror object that can be
1077 // decided at dump time (such as the initial values of the static fields, the
1078 // component mirror, etc). At runtime, more information is added to it by
1079 // java_lang_Class::restore_archived_mirror().
1080 //
1081 // Essentially, /*dumptime*/create_scratch_mirror() + /*runtime*/restore_archived_mirror()
1082 // produces the same result as /*runtime*/create_mirror().
1083 //
1084 // Note: we archive the "scratch mirror" instead of k->java_mirror(), because the
1085 // latter may contain dumptime-specific information that cannot be archived
1086 // (e.g., ClassLoaderData*, or static fields that are modified by Java code execution).
1087 void java_lang_Class::create_scratch_mirror(Klass* k, TRAPS) {
1088   if (k->class_loader() != nullptr &&
1089       k->class_loader() != SystemDictionary::java_platform_loader() &&
1090       k->class_loader() != SystemDictionary::java_system_loader()) {
1091     // We only archive the mirrors of classes loaded by the built-in loaders
1092     return;
1093   }
1094 
1095   Handle protection_domain, classData; // set to null. Will be reinitialized at runtime
1096   Handle mirror;
1097   Handle comp_mirror;
1098   allocate_mirror(k, /*is_scratch=*/true, protection_domain, classData, mirror, comp_mirror, CHECK);
1099 
1100   if (comp_mirror() != nullptr) {
1101     release_set_array_klass(comp_mirror(), k);
1102   }
1103 
1104   HeapShared::set_scratch_java_mirror(k, mirror());
1105 }
1106 
1107 // Returns true if the mirror is updated, false if no archived mirror
1108 // data is present. After the archived mirror object is restored, the
1109 // shared klass' _has_raw_archived_mirror flag is cleared.
1110 bool java_lang_Class::restore_archived_mirror(Klass *k,
1111                                               Handle class_loader, Handle module,
1112                                               Handle protection_domain, TRAPS) {
1113   // Postpone restoring archived mirror until java.lang.Class is loaded. Please
1114   // see more details in vmClasses::resolve_all().
1115   if (!vmClasses::Class_klass_loaded()) {
1116     assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1117     fixup_mirror_list()->push(k);
1118     return true;
1119   }
1120 
1121   oop m = k->archived_java_mirror();
1122   assert(m != nullptr, "must have stored non-null archived mirror");
1123 
1124   // Sanity: clear it now to prevent re-initialization if any of the following fails
1125   k->clear_archived_mirror_index();
1126 
1127   // mirror is archived, restore
1128   log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1129   assert(as_Klass(m) == k, "must be");
1130   Handle mirror(THREAD, m);
1131 
1132   if (!k->is_array_klass()) {
1133     // - local static final fields with initial values were initialized at dump time
1134 
1135     if (protection_domain.not_null()) {
1136       set_protection_domain(mirror(), protection_domain());
1137     }
1138   }
1139 
1140   assert(class_loader() == k->class_loader(), "should be same");
1141   if (class_loader.not_null()) {
1142     set_class_loader(mirror(), class_loader());
1143   }
1144 
1145   k->set_java_mirror(mirror);
1146 
1147   set_mirror_module_field(THREAD, k, mirror, module);
1148 
1149   if (log_is_enabled(Trace, cds, heap, mirror)) {
1150     ResourceMark rm(THREAD);
1151     log_trace(cds, heap, mirror)(
1152         "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1153   }
1154 
1155   return true;
1156 }
1157 #endif // INCLUDE_CDS_JAVA_HEAP
1158 
1159 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1160   assert(_module_offset != 0, "must have been computed already");
1161   set_module(k->java_mirror(), module());
1162 }
1163 
1164 void java_lang_Class::set_oop_size(HeapWord* java_class, size_t size) {
1165   assert(_oop_size_offset != 0, "must be set");
1166   assert(size > 0, "Oop size must be greater than zero, not " SIZE_FORMAT, size);
1167   assert(size <= INT_MAX, "Lossy conversion: " SIZE_FORMAT, size);
1168   *(int*)(((char*)java_class) + _oop_size_offset) = (int)size;
1169 }
1170 
1171 int  java_lang_Class::static_oop_field_count(oop java_class) {
1172   assert(_static_oop_field_count_offset != 0, "must be set");
1173   return java_class->int_field(_static_oop_field_count_offset);
1174 }
1175 
1176 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1177   assert(_static_oop_field_count_offset != 0, "must be set");
1178   java_class->int_field_put(_static_oop_field_count_offset, size);
1179 }
1180 
1181 oop java_lang_Class::protection_domain(oop java_class) {
1182   assert(_protection_domain_offset != 0, "must be set");
1183   return java_class->obj_field(_protection_domain_offset);
1184 }
1185 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1186   assert(_protection_domain_offset != 0, "must be set");
1187   java_class->obj_field_put(_protection_domain_offset, pd);
1188 }
1189 
1190 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1191   assert(_component_mirror_offset != 0, "must be set");
1192     java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1193   }
1194 oop java_lang_Class::component_mirror(oop java_class) {
1195   assert(_component_mirror_offset != 0, "must be set");
1196   return java_class->obj_field(_component_mirror_offset);
1197 }
1198 
1199 objArrayOop java_lang_Class::signers(oop java_class) {
1200   assert(_signers_offset != 0, "must be set");
1201   return (objArrayOop)java_class->obj_field(_signers_offset);
1202 }
1203 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
1204   assert(_signers_offset != 0, "must be set");
1205   java_class->obj_field_put(_signers_offset, signers);
1206 }
1207 
1208 oop java_lang_Class::class_data(oop java_class) {
1209   assert(_classData_offset != 0, "must be set");
1210   return java_class->obj_field(_classData_offset);
1211 }
1212 void java_lang_Class::set_class_data(oop java_class, oop class_data) {
1213   assert(_classData_offset != 0, "must be set");
1214   java_class->obj_field_put(_classData_offset, class_data);
1215 }
1216 
1217 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1218   assert(_class_loader_offset != 0, "offsets should have been initialized");
1219   java_class->obj_field_put(_class_loader_offset, loader);
1220 }
1221 
1222 oop java_lang_Class::class_loader(oop java_class) {
1223   assert(_class_loader_offset != 0, "must be set");
1224   return java_class->obj_field(_class_loader_offset);
1225 }
1226 
1227 oop java_lang_Class::module(oop java_class) {
1228   assert(_module_offset != 0, "must be set");
1229   return java_class->obj_field(_module_offset);
1230 }
1231 
1232 void java_lang_Class::set_module(oop java_class, oop module) {
1233   assert(_module_offset != 0, "must be set");
1234   java_class->obj_field_put(_module_offset, module);
1235 }
1236 
1237 oop java_lang_Class::name(Handle java_class, TRAPS) {
1238   assert(_name_offset != 0, "must be set");
1239   oop o = java_class->obj_field(_name_offset);
1240   if (o == nullptr) {
1241     o = StringTable::intern(as_external_name(java_class()), THREAD);
1242     java_class->obj_field_put(_name_offset, o);
1243   }
1244   return o;
1245 }
1246 
1247 oop java_lang_Class::source_file(oop java_class) {
1248   assert(_source_file_offset != 0, "must be set");
1249   return java_class->obj_field(_source_file_offset);
1250 }
1251 
1252 void java_lang_Class::set_source_file(oop java_class, oop source_file) {
1253   assert(_source_file_offset != 0, "must be set");
1254   java_class->obj_field_put(_source_file_offset, source_file);
1255 }
1256 
1257 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1258   // This should be improved by adding a field at the Java level or by
1259   // introducing a new VM klass (see comment in ClassFileParser)
1260   oop java_class = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(nullptr, CHECK_NULL);
1261   if (type != T_VOID) {
1262     Klass* aklass = Universe::typeArrayKlassObj(type);
1263     assert(aklass != nullptr, "correct bootstrap");
1264     release_set_array_klass(java_class, aklass);
1265   }
1266 #ifdef ASSERT
1267   InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(vmClasses::Class_klass());
1268   assert(static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1269 #endif
1270   return java_class;
1271 }
1272 
1273 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1274   assert(is_instance(java_class), "must be a Class object");
1275   java_class->metadata_field_put(_klass_offset, klass);
1276 }
1277 
1278 
1279 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1280   assert(is_instance(java_class), "must be a Class object");
1281   Symbol* name = nullptr;
1282   bool is_instance = false;
1283   if (is_primitive(java_class)) {
1284     name = vmSymbols::type_signature(primitive_type(java_class));
1285   } else {
1286     Klass* k = as_Klass(java_class);
1287     is_instance = k->is_instance_klass();
1288     name = k->name();
1289   }
1290   if (name == nullptr) {
1291     st->print("<null>");
1292     return;
1293   }
1294   if (is_instance)  st->print("L");
1295   st->write((char*) name->base(), (int) name->utf8_length());
1296   if (is_instance)  st->print(";");
1297 }
1298 
1299 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) {
1300   assert(is_instance(java_class), "must be a Class object");
1301   Symbol* name;
1302   if (is_primitive(java_class)) {
1303     name = vmSymbols::type_signature(primitive_type(java_class));
1304     // Because this can create a new symbol, the caller has to decrement
1305     // the refcount, so make adjustment here and below for symbols returned
1306     // that are not created or incremented due to a successful lookup.
1307     name->increment_refcount();
1308   } else {
1309     Klass* k = as_Klass(java_class);
1310     if (!k->is_instance_klass()) {
1311       name = k->name();
1312       name->increment_refcount();
1313     } else {
1314       ResourceMark rm;
1315       const char* sigstr = k->signature_name();
1316       int         siglen = (int) strlen(sigstr);
1317       if (!intern_if_not_found) {
1318         name = SymbolTable::probe(sigstr, siglen);
1319       } else {
1320         name = SymbolTable::new_symbol(sigstr, siglen);
1321       }
1322     }
1323   }
1324   return name;
1325 }
1326 
1327 // Returns the Java name for this Java mirror (Resource allocated)
1328 // See Klass::external_name().
1329 // For primitive type Java mirrors, its type name is returned.
1330 const char* java_lang_Class::as_external_name(oop java_class) {
1331   assert(is_instance(java_class), "must be a Class object");
1332   const char* name = nullptr;
1333   if (is_primitive(java_class)) {
1334     name = type2name(primitive_type(java_class));
1335   } else {
1336     name = as_Klass(java_class)->external_name();
1337   }
1338   if (name == nullptr) {
1339     name = "<null>";
1340   }
1341   return name;
1342 }
1343 
1344 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1345   Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1346   assert(k == nullptr || k->is_klass() && k->is_array_klass(), "should be array klass");
1347   return k;
1348 }
1349 
1350 
1351 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1352   assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1353   java_class->release_metadata_field_put(_array_klass_offset, klass);
1354 }
1355 
1356 
1357 BasicType java_lang_Class::primitive_type(oop java_class) {
1358   assert(is_primitive(java_class), "just checking");
1359   Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1360   BasicType type = T_VOID;
1361   if (ak != nullptr) {
1362     // Note: create_basic_type_mirror above initializes ak to a non-null value.
1363     type = ArrayKlass::cast(ak)->element_type();
1364   } else {
1365     assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
1366   }
1367 #ifdef ASSERT
1368   if (CDSConfig::is_dumping_heap()) {
1369     oop mirror = Universe::java_mirror(type);
1370     oop scratch_mirror = HeapShared::scratch_java_mirror(type);
1371     assert(java_class == mirror || java_class == scratch_mirror, "must be consistent");
1372   } else {
1373     assert(Universe::java_mirror(type) == java_class, "must be consistent");
1374   }
1375 #endif
1376   return type;
1377 }
1378 
1379 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1380   assert(is_instance(java_class), "must be a Class object");
1381   if (is_primitive(java_class)) {
1382     if (reference_klass != nullptr)
1383       (*reference_klass) = nullptr;
1384     return primitive_type(java_class);
1385   } else {
1386     if (reference_klass != nullptr)
1387       (*reference_klass) = as_Klass(java_class);
1388     return T_OBJECT;
1389   }
1390 }
1391 
1392 
1393 oop java_lang_Class::primitive_mirror(BasicType t) {
1394   oop mirror = Universe::java_mirror(t);
1395   assert(mirror != nullptr && mirror->is_a(vmClasses::Class_klass()), "must be a Class");
1396   assert(is_primitive(mirror), "must be primitive");
1397   return mirror;
1398 }
1399 
1400 #define CLASS_FIELDS_DO(macro) \
1401   macro(_classRedefinedCount_offset, k, "classRedefinedCount", int_signature,         false); \
1402   macro(_class_loader_offset,        k, "classLoader",         classloader_signature, false); \
1403   macro(_component_mirror_offset,    k, "componentType",       class_signature,       false); \
1404   macro(_module_offset,              k, "module",              module_signature,      false); \
1405   macro(_name_offset,                k, "name",                string_signature,      false); \
1406   macro(_classData_offset,           k, "classData",           object_signature,      false);
1407 
1408 void java_lang_Class::compute_offsets() {
1409   if (_offsets_computed) {
1410     return;
1411   }
1412 
1413   _offsets_computed = true;
1414 
1415   InstanceKlass* k = vmClasses::Class_klass();
1416   CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1417 
1418   CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1419 }
1420 
1421 #if INCLUDE_CDS
1422 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1423   f->do_bool(&_offsets_computed);
1424 
1425   CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1426 
1427   CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1428 }
1429 #endif
1430 
1431 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1432   assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1433   return the_class_mirror->int_field(_classRedefinedCount_offset);
1434 }
1435 
1436 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1437   assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1438   the_class_mirror->int_field_put(_classRedefinedCount_offset, value);
1439 }
1440 
1441 
1442 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1443 //       platform thread structure, and a eetop offset which was used for thread
1444 //       local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1445 //       merged, so in the HotSpot VM we just use the eetop field for the thread
1446 //       instead of the privateInfo_offset.
1447 //
1448 // Note: The stackSize field is only present starting in 1.4.
1449 
1450 int java_lang_Thread_FieldHolder::_group_offset;
1451 int java_lang_Thread_FieldHolder::_priority_offset;
1452 int java_lang_Thread_FieldHolder::_stackSize_offset;
1453 int java_lang_Thread_FieldHolder::_daemon_offset;
1454 int java_lang_Thread_FieldHolder::_thread_status_offset;
1455 
1456 #define THREAD_FIELD_HOLDER_FIELDS_DO(macro) \
1457   macro(_group_offset,         k, vmSymbols::group_name(),    threadgroup_signature, false); \
1458   macro(_priority_offset,      k, vmSymbols::priority_name(), int_signature,         false); \
1459   macro(_stackSize_offset,     k, "stackSize",                long_signature,        false); \
1460   macro(_daemon_offset,        k, vmSymbols::daemon_name(),   bool_signature,        false); \
1461   macro(_thread_status_offset, k, "threadStatus",             int_signature,         false)
1462 
1463 void java_lang_Thread_FieldHolder::compute_offsets() {
1464   assert(_group_offset == 0, "offsets should be initialized only once");
1465 
1466   InstanceKlass* k = vmClasses::Thread_FieldHolder_klass();
1467   THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1468 }
1469 
1470 #if INCLUDE_CDS
1471 void java_lang_Thread_FieldHolder::serialize_offsets(SerializeClosure* f) {
1472   THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1473 }
1474 #endif
1475 
1476 oop java_lang_Thread_FieldHolder::threadGroup(oop holder) {
1477   return holder->obj_field(_group_offset);
1478 }
1479 
1480 ThreadPriority java_lang_Thread_FieldHolder::priority(oop holder) {
1481   return (ThreadPriority)holder->int_field(_priority_offset);
1482 }
1483 
1484 void java_lang_Thread_FieldHolder::set_priority(oop holder, ThreadPriority priority) {
1485   holder->int_field_put(_priority_offset, priority);
1486 }
1487 
1488 jlong java_lang_Thread_FieldHolder::stackSize(oop holder) {
1489   return holder->long_field(_stackSize_offset);
1490 }
1491 
1492 bool java_lang_Thread_FieldHolder::is_daemon(oop holder) {
1493   return holder->bool_field(_daemon_offset) != 0;
1494 }
1495 
1496 void java_lang_Thread_FieldHolder::set_daemon(oop holder, bool val) {
1497   assert(val, "daemon status is never turned off");
1498   holder->bool_field_put(_daemon_offset, val);
1499 }
1500 
1501 void java_lang_Thread_FieldHolder::set_thread_status(oop holder, JavaThreadStatus status) {
1502   holder->int_field_put(_thread_status_offset, static_cast<int>(status));
1503 }
1504 
1505 JavaThreadStatus java_lang_Thread_FieldHolder::get_thread_status(oop holder) {
1506   return static_cast<JavaThreadStatus>(holder->int_field(_thread_status_offset));
1507 }
1508 
1509 
1510 int java_lang_Thread_Constants::_static_VTHREAD_GROUP_offset = 0;
1511 
1512 #define THREAD_CONSTANTS_STATIC_FIELDS_DO(macro) \
1513   macro(_static_VTHREAD_GROUP_offset,             k, "VTHREAD_GROUP",             threadgroup_signature, true);
1514 
1515 void java_lang_Thread_Constants::compute_offsets() {
1516   assert(_static_VTHREAD_GROUP_offset == 0, "offsets should be initialized only once");
1517 
1518   InstanceKlass* k = vmClasses::Thread_Constants_klass();
1519   THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1520 }
1521 
1522 #if INCLUDE_CDS
1523 void java_lang_Thread_Constants::serialize_offsets(SerializeClosure* f) {
1524   THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1525 }
1526 #endif
1527 
1528 oop java_lang_Thread_Constants::get_VTHREAD_GROUP() {
1529   InstanceKlass* k = vmClasses::Thread_Constants_klass();
1530   oop base = k->static_field_base_raw();
1531   return base->obj_field(_static_VTHREAD_GROUP_offset);
1532 }
1533 
1534 
1535 int java_lang_Thread::_holder_offset;
1536 int java_lang_Thread::_name_offset;
1537 int java_lang_Thread::_contextClassLoader_offset;
1538 int java_lang_Thread::_inheritedAccessControlContext_offset;
1539 int java_lang_Thread::_eetop_offset;
1540 int java_lang_Thread::_jvmti_thread_state_offset;
1541 int java_lang_Thread::_jvmti_VTMS_transition_disable_count_offset;
1542 int java_lang_Thread::_jvmti_is_in_VTMS_transition_offset;
1543 int java_lang_Thread::_interrupted_offset;
1544 int java_lang_Thread::_tid_offset;
1545 int java_lang_Thread::_continuation_offset;
1546 int java_lang_Thread::_park_blocker_offset;
1547 int java_lang_Thread::_scopedValueBindings_offset;
1548 JFR_ONLY(int java_lang_Thread::_jfr_epoch_offset;)
1549 
1550 #define THREAD_FIELDS_DO(macro) \
1551   macro(_holder_offset,        k, "holder", thread_fieldholder_signature, false); \
1552   macro(_name_offset,          k, vmSymbols::name_name(), string_signature, false); \
1553   macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \
1554   macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \
1555   macro(_eetop_offset,         k, "eetop", long_signature, false); \
1556   macro(_interrupted_offset,   k, "interrupted", bool_signature, false); \
1557   macro(_tid_offset,           k, "tid", long_signature, false); \
1558   macro(_park_blocker_offset,  k, "parkBlocker", object_signature, false); \
1559   macro(_continuation_offset,  k, "cont", continuation_signature, false); \
1560   macro(_scopedValueBindings_offset, k, "scopedValueBindings", object_signature, false);
1561 
1562 void java_lang_Thread::compute_offsets() {
1563   assert(_holder_offset == 0, "offsets should be initialized only once");
1564 
1565   InstanceKlass* k = vmClasses::Thread_klass();
1566   THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1567   THREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1568 }
1569 
1570 #if INCLUDE_CDS
1571 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1572   THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1573   THREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1574 }
1575 #endif
1576 
1577 JavaThread* java_lang_Thread::thread(oop java_thread) {
1578   return reinterpret_cast<JavaThread*>(java_thread->address_field(_eetop_offset));
1579 }
1580 
1581 JavaThread* java_lang_Thread::thread_acquire(oop java_thread) {
1582   return reinterpret_cast<JavaThread*>(java_thread->address_field_acquire(_eetop_offset));
1583 }
1584 
1585 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1586   java_thread->address_field_put(_eetop_offset, (address)thread);
1587 }
1588 
1589 void java_lang_Thread::release_set_thread(oop java_thread, JavaThread* thread) {
1590   java_thread->release_address_field_put(_eetop_offset, (address)thread);
1591 }
1592 
1593 JvmtiThreadState* java_lang_Thread::jvmti_thread_state(oop java_thread) {
1594   return (JvmtiThreadState*)java_thread->address_field(_jvmti_thread_state_offset);
1595 }
1596 
1597 void java_lang_Thread::set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state) {
1598   java_thread->address_field_put(_jvmti_thread_state_offset, (address)state);
1599 }
1600 
1601 int java_lang_Thread::VTMS_transition_disable_count(oop java_thread) {
1602   return java_thread->int_field(_jvmti_VTMS_transition_disable_count_offset);
1603 }
1604 
1605 void java_lang_Thread::inc_VTMS_transition_disable_count(oop java_thread) {
1606   assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1607   int val = VTMS_transition_disable_count(java_thread);
1608   java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val + 1);
1609 }
1610 
1611 void java_lang_Thread::dec_VTMS_transition_disable_count(oop java_thread) {
1612   assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1613   int val = VTMS_transition_disable_count(java_thread);
1614   assert(val > 0, "VTMS_transition_disable_count should never be negative");
1615   java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val - 1);
1616 }
1617 
1618 bool java_lang_Thread::is_in_VTMS_transition(oop java_thread) {
1619   return java_thread->bool_field_volatile(_jvmti_is_in_VTMS_transition_offset);
1620 }
1621 
1622 void java_lang_Thread::set_is_in_VTMS_transition(oop java_thread, bool val) {
1623   java_thread->bool_field_put_volatile(_jvmti_is_in_VTMS_transition_offset, val);
1624 }
1625 
1626 int java_lang_Thread::is_in_VTMS_transition_offset() {
1627   return _jvmti_is_in_VTMS_transition_offset;
1628 }
1629 
1630 void java_lang_Thread::clear_scopedValueBindings(oop java_thread) {
1631   assert(java_thread != nullptr, "need a java_lang_Thread pointer here");
1632   java_thread->obj_field_put(_scopedValueBindings_offset, nullptr);
1633 }
1634 
1635 oop java_lang_Thread::holder(oop java_thread) {
1636   // Note: may return null if the thread is still attaching
1637   return java_thread->obj_field(_holder_offset);
1638 }
1639 
1640 bool java_lang_Thread::interrupted(oop java_thread) {
1641   // Make sure the caller can safely access oops.
1642   assert(Thread::current()->is_VM_thread() ||
1643          (JavaThread::current()->thread_state() != _thread_blocked &&
1644           JavaThread::current()->thread_state() != _thread_in_native),
1645          "Unsafe access to oop");
1646   return java_thread->bool_field_volatile(_interrupted_offset);
1647 }
1648 
1649 void java_lang_Thread::set_interrupted(oop java_thread, bool val) {
1650   // Make sure the caller can safely access oops.
1651   assert(Thread::current()->is_VM_thread() ||
1652          (JavaThread::current()->thread_state() != _thread_blocked &&
1653           JavaThread::current()->thread_state() != _thread_in_native),
1654          "Unsafe access to oop");
1655   java_thread->bool_field_put_volatile(_interrupted_offset, val);
1656 }
1657 
1658 
1659 oop java_lang_Thread::name(oop java_thread) {
1660   return java_thread->obj_field(_name_offset);
1661 }
1662 
1663 
1664 void java_lang_Thread::set_name(oop java_thread, oop name) {
1665   java_thread->obj_field_put(_name_offset, name);
1666 }
1667 
1668 // Convenience macros for setting and getting Thread fields that
1669 // are actually stored in the FieldHolder object of the thread.
1670 // The FieldHolder can be null whilst a thread is attaching via
1671 // JNI, and when the main thread is attaching.
1672 
1673 // The default value should be the default/zero initialized value
1674 // of the field as it would be in java.lang.Thread.FieldHolder.
1675 #define GET_FIELDHOLDER_FIELD(java_thread, field, default_val)  \
1676   {                                                             \
1677     oop holder = java_lang_Thread::holder(java_thread);         \
1678     if (holder != nullptr)                                      \
1679       return java_lang_Thread_FieldHolder::field(holder);       \
1680     else                                                        \
1681       return default_val;                                       \
1682   }
1683 
1684 // We should never be trying to set a field of an attaching thread.
1685 #define SET_FIELDHOLDER_FIELD(java_thread, field, value)        \
1686   {                                                             \
1687     oop holder = java_lang_Thread::holder(java_thread);         \
1688     assert(holder != nullptr, "Thread not fully initialized");  \
1689     java_lang_Thread_FieldHolder::set_##field(holder, value);   \
1690   }
1691 
1692 
1693 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1694   GET_FIELDHOLDER_FIELD(java_thread, priority, (ThreadPriority)0);
1695 }
1696 
1697 
1698 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1699   SET_FIELDHOLDER_FIELD(java_thread, priority, priority)
1700 }
1701 
1702 
1703 oop java_lang_Thread::threadGroup(oop java_thread) {
1704   GET_FIELDHOLDER_FIELD(java_thread, threadGroup, nullptr);
1705 }
1706 
1707 
1708 bool java_lang_Thread::is_alive(oop java_thread) {
1709   JavaThread* thr = java_lang_Thread::thread(java_thread);
1710   return (thr != nullptr);
1711 }
1712 
1713 
1714 bool java_lang_Thread::is_daemon(oop java_thread) {
1715   GET_FIELDHOLDER_FIELD(java_thread, is_daemon, false);
1716 }
1717 
1718 
1719 void java_lang_Thread::set_daemon(oop java_thread) {
1720   SET_FIELDHOLDER_FIELD(java_thread, daemon, true);
1721 }
1722 
1723 oop java_lang_Thread::context_class_loader(oop java_thread) {
1724   return java_thread->obj_field(_contextClassLoader_offset);
1725 }
1726 
1727 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1728   return java_thread->obj_field(_inheritedAccessControlContext_offset);
1729 }
1730 
1731 
1732 jlong java_lang_Thread::stackSize(oop java_thread) {
1733   GET_FIELDHOLDER_FIELD(java_thread, stackSize, 0);
1734 }
1735 
1736 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1737 void java_lang_Thread::set_thread_status(oop java_thread, JavaThreadStatus status) {
1738   SET_FIELDHOLDER_FIELD(java_thread, thread_status, status);
1739 }
1740 
1741 // Read thread status value from threadStatus field in java.lang.Thread java class.
1742 JavaThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1743   // Make sure the caller is operating on behalf of the VM or is
1744   // running VM code (state == _thread_in_vm).
1745   assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1746          JavaThread::current()->thread_state() == _thread_in_vm,
1747          "Java Thread is not running in vm");
1748   GET_FIELDHOLDER_FIELD(java_thread, get_thread_status, JavaThreadStatus::NEW /* not initialized */);
1749 }
1750 
1751 ByteSize java_lang_Thread::thread_id_offset() {
1752   return in_ByteSize(_tid_offset);
1753 }
1754 
1755 oop java_lang_Thread::park_blocker(oop java_thread) {
1756   return java_thread->obj_field(_park_blocker_offset);
1757 }
1758 
1759 oop java_lang_Thread::async_get_stack_trace(oop java_thread, TRAPS) {
1760   ThreadsListHandle tlh(JavaThread::current());
1761   JavaThread* thread;
1762   bool is_virtual = java_lang_VirtualThread::is_instance(java_thread);
1763   if (is_virtual) {
1764     oop carrier_thread = java_lang_VirtualThread::carrier_thread(java_thread);
1765     if (carrier_thread == nullptr) {
1766       return nullptr;
1767     }
1768     thread = java_lang_Thread::thread(carrier_thread);
1769   } else {
1770     thread = java_lang_Thread::thread(java_thread);
1771   }
1772   if (thread == nullptr) {
1773     return nullptr;
1774   }
1775 
1776   class GetStackTraceClosure : public HandshakeClosure {
1777   public:
1778     const Handle _java_thread;
1779     int _depth;
1780     bool _retry_handshake;
1781     GrowableArray<Method*>* _methods;
1782     GrowableArray<int>*     _bcis;
1783 
1784     GetStackTraceClosure(Handle java_thread) :
1785         HandshakeClosure("GetStackTraceClosure"), _java_thread(java_thread), _depth(0), _retry_handshake(false),
1786         _methods(nullptr), _bcis(nullptr) {
1787     }
1788     ~GetStackTraceClosure() {
1789       delete _methods;
1790       delete _bcis;
1791     }
1792 
1793     bool read_reset_retry() {
1794       bool ret = _retry_handshake;
1795       // If we re-execute the handshake this method need to return false
1796       // when the handshake cannot be performed. (E.g. thread terminating)
1797       _retry_handshake = false;
1798       return ret;
1799     }
1800 
1801     void do_thread(Thread* th) {
1802       if (!Thread::current()->is_Java_thread()) {
1803         _retry_handshake = true;
1804         return;
1805       }
1806 
1807       JavaThread* thread = JavaThread::cast(th);
1808 
1809       if (!thread->has_last_Java_frame()) {
1810         return;
1811       }
1812 
1813       bool carrier = false;
1814       if (java_lang_VirtualThread::is_instance(_java_thread())) {
1815         // if (thread->vthread() != _java_thread()) // We might be inside a System.executeOnCarrierThread
1816         const ContinuationEntry* ce = thread->vthread_continuation();
1817         if (ce == nullptr || ce->cont_oop(thread) != java_lang_VirtualThread::continuation(_java_thread())) {
1818           return; // not mounted
1819         }
1820       } else {
1821         carrier = (thread->vthread_continuation() != nullptr);
1822       }
1823 
1824       const int max_depth = MaxJavaStackTraceDepth;
1825       const bool skip_hidden = !ShowHiddenFrames;
1826 
1827       // Pick minimum length that will cover most cases
1828       int init_length = 64;
1829       _methods = new (mtInternal) GrowableArray<Method*>(init_length, mtInternal);
1830       _bcis = new (mtInternal) GrowableArray<int>(init_length, mtInternal);
1831 
1832       int total_count = 0;
1833       for (vframeStream vfst(thread, false, false, carrier); // we don't process frames as we don't care about oops
1834            !vfst.at_end() && (max_depth == 0 || max_depth != total_count);
1835            vfst.next()) {
1836 
1837         if (skip_hidden && (vfst.method()->is_hidden() ||
1838                             vfst.method()->is_continuation_enter_intrinsic())) {
1839           continue;
1840         }
1841 
1842         _methods->push(vfst.method());
1843         _bcis->push(vfst.bci());
1844         total_count++;
1845       }
1846 
1847       _depth = total_count;
1848     }
1849   };
1850 
1851   // Handshake with target
1852   ResourceMark rm(THREAD);
1853   HandleMark   hm(THREAD);
1854   GetStackTraceClosure gstc(Handle(THREAD, java_thread));
1855   do {
1856    Handshake::execute(&gstc, &tlh, thread);
1857   } while (gstc.read_reset_retry());
1858 
1859   // Stop if no stack trace is found.
1860   if (gstc._depth == 0) {
1861     return nullptr;
1862   }
1863 
1864   // Convert to StackTraceElement array
1865   InstanceKlass* k = vmClasses::StackTraceElement_klass();
1866   assert(k != nullptr, "must be loaded in 1.4+");
1867   if (k->should_be_initialized()) {
1868     k->initialize(CHECK_NULL);
1869   }
1870   objArrayHandle trace = oopFactory::new_objArray_handle(k, gstc._depth, CHECK_NULL);
1871 
1872   for (int i = 0; i < gstc._depth; i++) {
1873     methodHandle method(THREAD, gstc._methods->at(i));
1874     oop element = java_lang_StackTraceElement::create(method,
1875                                                       gstc._bcis->at(i),
1876                                                       CHECK_NULL);
1877     trace->obj_at_put(i, element);
1878   }
1879 
1880   return trace();
1881 }
1882 
1883 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1884   JavaThreadStatus status = get_thread_status(java_thread);
1885   switch (status) {
1886     case JavaThreadStatus::NEW                      : return "NEW";
1887     case JavaThreadStatus::RUNNABLE                 : return "RUNNABLE";
1888     case JavaThreadStatus::SLEEPING                 : return "TIMED_WAITING (sleeping)";
1889     case JavaThreadStatus::IN_OBJECT_WAIT           : return "WAITING (on object monitor)";
1890     case JavaThreadStatus::IN_OBJECT_WAIT_TIMED     : return "TIMED_WAITING (on object monitor)";
1891     case JavaThreadStatus::PARKED                   : return "WAITING (parking)";
1892     case JavaThreadStatus::PARKED_TIMED             : return "TIMED_WAITING (parking)";
1893     case JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1894     case JavaThreadStatus::TERMINATED               : return "TERMINATED";
1895     default                       : return "UNKNOWN";
1896   };
1897 }
1898 int java_lang_ThreadGroup::_parent_offset;
1899 int java_lang_ThreadGroup::_name_offset;
1900 int java_lang_ThreadGroup::_maxPriority_offset;
1901 int java_lang_ThreadGroup::_daemon_offset;
1902 
1903 oop  java_lang_ThreadGroup::parent(oop java_thread_group) {
1904   assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1905   return java_thread_group->obj_field(_parent_offset);
1906 }
1907 
1908 // ("name as oop" accessor is not necessary)
1909 
1910 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
1911   oop name = java_thread_group->obj_field(_name_offset);
1912   // ThreadGroup.name can be null
1913   if (name != nullptr) {
1914     return java_lang_String::as_utf8_string(name);
1915   }
1916   return nullptr;
1917 }
1918 
1919 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1920   assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1921   return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1922 }
1923 
1924 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1925   assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1926   return java_thread_group->bool_field(_daemon_offset) != 0;
1927 }
1928 
1929 #define THREADGROUP_FIELDS_DO(macro) \
1930   macro(_parent_offset,      k, vmSymbols::parent_name(),      threadgroup_signature,         false); \
1931   macro(_name_offset,        k, vmSymbols::name_name(),        string_signature,              false); \
1932   macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature,                 false); \
1933   macro(_daemon_offset,      k, vmSymbols::daemon_name(),      bool_signature,                false);
1934 
1935 void java_lang_ThreadGroup::compute_offsets() {
1936   assert(_parent_offset == 0, "offsets should be initialized only once");
1937 
1938   InstanceKlass* k = vmClasses::ThreadGroup_klass();
1939   THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1940 }
1941 
1942 #if INCLUDE_CDS
1943 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
1944   THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1945 }
1946 #endif
1947 
1948 
1949 // java_lang_VirtualThread
1950 
1951 int java_lang_VirtualThread::static_vthread_scope_offset;
1952 int java_lang_VirtualThread::_carrierThread_offset;
1953 int java_lang_VirtualThread::_continuation_offset;
1954 int java_lang_VirtualThread::_state_offset;
1955 
1956 #define VTHREAD_FIELDS_DO(macro) \
1957   macro(static_vthread_scope_offset,       k, "VTHREAD_SCOPE",      continuationscope_signature, true);  \
1958   macro(_carrierThread_offset,             k, "carrierThread",      thread_signature,            false); \
1959   macro(_continuation_offset,              k, "cont",               continuation_signature,      false); \
1960   macro(_state_offset,                     k, "state",              int_signature,               false)
1961 
1962 
1963 void java_lang_VirtualThread::compute_offsets() {
1964   InstanceKlass* k = vmClasses::VirtualThread_klass();
1965   VTHREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1966 }
1967 
1968 bool java_lang_VirtualThread::is_instance(oop obj) {
1969   return obj != nullptr && is_subclass(obj->klass());
1970 }
1971 
1972 oop java_lang_VirtualThread::carrier_thread(oop vthread) {
1973   oop thread = vthread->obj_field(_carrierThread_offset);
1974   return thread;
1975 }
1976 
1977 oop java_lang_VirtualThread::continuation(oop vthread) {
1978   oop cont = vthread->obj_field(_continuation_offset);
1979   return cont;
1980 }
1981 
1982 int java_lang_VirtualThread::state(oop vthread) {
1983   return vthread->int_field_acquire(_state_offset);
1984 }
1985 
1986 JavaThreadStatus java_lang_VirtualThread::map_state_to_thread_status(int state) {
1987   JavaThreadStatus status = JavaThreadStatus::NEW;
1988   switch (state & ~SUSPENDED) {
1989     case NEW :
1990       status = JavaThreadStatus::NEW;
1991       break;
1992     case STARTED :
1993     case RUNNABLE :
1994     case RUNNING :
1995     case PARKING :
1996     case TIMED_PARKING:
1997     case YIELDING :
1998       status = JavaThreadStatus::RUNNABLE;
1999       break;
2000     case PARKED :
2001     case PINNED :
2002       status = JavaThreadStatus::PARKED;
2003       break;
2004     case TIMED_PARKED:
2005     case TIMED_PINNED:
2006       status = JavaThreadStatus::PARKED_TIMED;
2007       break;
2008     case TERMINATED :
2009       status = JavaThreadStatus::TERMINATED;
2010       break;
2011     default:
2012       ShouldNotReachHere();
2013   }
2014   return status;
2015 }
2016 
2017 #if INCLUDE_CDS
2018 void java_lang_VirtualThread::serialize_offsets(SerializeClosure* f) {
2019    VTHREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2020 }
2021 #endif
2022 
2023 // java_lang_Throwable
2024 
2025 int java_lang_Throwable::_backtrace_offset;
2026 int java_lang_Throwable::_detailMessage_offset;
2027 int java_lang_Throwable::_stackTrace_offset;
2028 int java_lang_Throwable::_depth_offset;
2029 int java_lang_Throwable::_cause_offset;
2030 int java_lang_Throwable::_static_unassigned_stacktrace_offset;
2031 
2032 #define THROWABLE_FIELDS_DO(macro) \
2033   macro(_backtrace_offset,     k, "backtrace",     object_signature,                  false); \
2034   macro(_detailMessage_offset, k, "detailMessage", string_signature,                  false); \
2035   macro(_stackTrace_offset,    k, "stackTrace",    java_lang_StackTraceElement_array, false); \
2036   macro(_depth_offset,         k, "depth",         int_signature,                     false); \
2037   macro(_cause_offset,         k, "cause",         throwable_signature,               false); \
2038   macro(_static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
2039 
2040 void java_lang_Throwable::compute_offsets() {
2041   InstanceKlass* k = vmClasses::Throwable_klass();
2042   THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2043 }
2044 
2045 #if INCLUDE_CDS
2046 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
2047   THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2048 }
2049 #endif
2050 
2051 oop java_lang_Throwable::unassigned_stacktrace() {
2052   InstanceKlass* ik = vmClasses::Throwable_klass();
2053   oop base = ik->static_field_base_raw();
2054   return base->obj_field(_static_unassigned_stacktrace_offset);
2055 }
2056 
2057 oop java_lang_Throwable::backtrace(oop throwable) {
2058   return throwable->obj_field_acquire(_backtrace_offset);
2059 }
2060 
2061 
2062 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
2063   throwable->release_obj_field_put(_backtrace_offset, value);
2064 }
2065 
2066 int java_lang_Throwable::depth(oop throwable) {
2067   return throwable->int_field(_depth_offset);
2068 }
2069 
2070 void java_lang_Throwable::set_depth(oop throwable, int value) {
2071   throwable->int_field_put(_depth_offset, value);
2072 }
2073 
2074 oop java_lang_Throwable::message(oop throwable) {
2075   return throwable->obj_field(_detailMessage_offset);
2076 }
2077 
2078 oop java_lang_Throwable::cause(oop throwable) {
2079   return throwable->obj_field(_cause_offset);
2080 }
2081 
2082 // Return Symbol for detailed_message or null
2083 Symbol* java_lang_Throwable::detail_message(oop throwable) {
2084   PreserveExceptionMark pm(Thread::current());
2085   oop detailed_message = java_lang_Throwable::message(throwable);
2086   if (detailed_message != nullptr) {
2087     return java_lang_String::as_symbol(detailed_message);
2088   }
2089   return nullptr;
2090 }
2091 
2092 void java_lang_Throwable::set_message(oop throwable, oop value) {
2093   throwable->obj_field_put(_detailMessage_offset, value);
2094 }
2095 
2096 
2097 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
2098   throwable->obj_field_put(_stackTrace_offset, st_element_array);
2099 }
2100 
2101 void java_lang_Throwable::clear_stacktrace(oop throwable) {
2102   set_stacktrace(throwable, nullptr);
2103 }
2104 
2105 
2106 void java_lang_Throwable::print(oop throwable, outputStream* st) {
2107   ResourceMark rm;
2108   Klass* k = throwable->klass();
2109   assert(k != nullptr, "just checking");
2110   st->print("%s", k->external_name());
2111   oop msg = message(throwable);
2112   if (msg != nullptr) {
2113     st->print(": %s", java_lang_String::as_utf8_string(msg));
2114   }
2115 }
2116 
2117 // After this many redefines, the stack trace is unreliable.
2118 const int MAX_VERSION = USHRT_MAX;
2119 
2120 static inline bool version_matches(Method* method, int version) {
2121   assert(version < MAX_VERSION, "version is too big");
2122   return method != nullptr && (method->constants()->version() == version);
2123 }
2124 
2125 // This class provides a simple wrapper over the internal structure of
2126 // exception backtrace to insulate users of the backtrace from needing
2127 // to know what it looks like.
2128 // The code of this class is not GC safe. Allocations can only happen
2129 // in expand().
2130 class BacktraceBuilder: public StackObj {
2131  friend class BacktraceIterator;
2132  private:
2133   Handle          _backtrace;
2134   objArrayOop     _head;
2135   typeArrayOop    _methods;
2136   typeArrayOop    _bcis;
2137   objArrayOop     _mirrors;
2138   typeArrayOop    _names; // Needed to insulate method name against redefinition.
2139   // True if the top frame of the backtrace is omitted because it shall be hidden.
2140   bool            _has_hidden_top_frame;
2141   int             _index;
2142   NoSafepointVerifier _nsv;
2143 
2144   enum {
2145     trace_methods_offset = java_lang_Throwable::trace_methods_offset,
2146     trace_bcis_offset    = java_lang_Throwable::trace_bcis_offset,
2147     trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
2148     trace_names_offset   = java_lang_Throwable::trace_names_offset,
2149     trace_conts_offset   = java_lang_Throwable::trace_conts_offset,
2150     trace_next_offset    = java_lang_Throwable::trace_next_offset,
2151     trace_hidden_offset  = java_lang_Throwable::trace_hidden_offset,
2152     trace_size           = java_lang_Throwable::trace_size,
2153     trace_chunk_size     = java_lang_Throwable::trace_chunk_size
2154   };
2155 
2156   // get info out of chunks
2157   static typeArrayOop get_methods(objArrayHandle chunk) {
2158     typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
2159     assert(methods != nullptr, "method array should be initialized in backtrace");
2160     return methods;
2161   }
2162   static typeArrayOop get_bcis(objArrayHandle chunk) {
2163     typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
2164     assert(bcis != nullptr, "bci array should be initialized in backtrace");
2165     return bcis;
2166   }
2167   static objArrayOop get_mirrors(objArrayHandle chunk) {
2168     objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
2169     assert(mirrors != nullptr, "mirror array should be initialized in backtrace");
2170     return mirrors;
2171   }
2172   static typeArrayOop get_names(objArrayHandle chunk) {
2173     typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2174     assert(names != nullptr, "names array should be initialized in backtrace");
2175     return names;
2176   }
2177   static bool has_hidden_top_frame(objArrayHandle chunk) {
2178     oop hidden = chunk->obj_at(trace_hidden_offset);
2179     return hidden != nullptr;
2180   }
2181 
2182  public:
2183 
2184   // constructor for new backtrace
2185   BacktraceBuilder(TRAPS): _head(nullptr), _methods(nullptr), _bcis(nullptr), _mirrors(nullptr), _names(nullptr), _has_hidden_top_frame(false) {
2186     expand(CHECK);
2187     _backtrace = Handle(THREAD, _head);
2188     _index = 0;
2189   }
2190 
2191   BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2192     _methods = get_methods(backtrace);
2193     _bcis = get_bcis(backtrace);
2194     _mirrors = get_mirrors(backtrace);
2195     _names = get_names(backtrace);
2196     _has_hidden_top_frame = has_hidden_top_frame(backtrace);
2197     assert(_methods->length() == _bcis->length() &&
2198            _methods->length() == _mirrors->length() &&
2199            _mirrors->length() == _names->length(),
2200            "method and source information arrays should match");
2201 
2202     // head is the preallocated backtrace
2203     _head = backtrace();
2204     _backtrace = Handle(thread, _head);
2205     _index = 0;
2206   }
2207 
2208   void expand(TRAPS) {
2209     objArrayHandle old_head(THREAD, _head);
2210     PauseNoSafepointVerifier pnsv(&_nsv);
2211 
2212     objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2213     objArrayHandle new_head(THREAD, head);
2214 
2215     typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2216     typeArrayHandle new_methods(THREAD, methods);
2217 
2218     typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2219     typeArrayHandle new_bcis(THREAD, bcis);
2220 
2221     objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2222     objArrayHandle new_mirrors(THREAD, mirrors);
2223 
2224     typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2225     typeArrayHandle new_names(THREAD, names);
2226 
2227     if (!old_head.is_null()) {
2228       old_head->obj_at_put(trace_next_offset, new_head());
2229     }
2230     new_head->obj_at_put(trace_methods_offset, new_methods());
2231     new_head->obj_at_put(trace_bcis_offset, new_bcis());
2232     new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2233     new_head->obj_at_put(trace_names_offset, new_names());
2234     new_head->obj_at_put(trace_hidden_offset, nullptr);
2235 
2236     _head    = new_head();
2237     _methods = new_methods();
2238     _bcis = new_bcis();
2239     _mirrors = new_mirrors();
2240     _names  = new_names();
2241     _index = 0;
2242   }
2243 
2244   oop backtrace() {
2245     return _backtrace();
2246   }
2247 
2248   inline void push(Method* method, int bci, TRAPS) {
2249     // Smear the -1 bci to 0 since the array only holds unsigned
2250     // shorts.  The later line number lookup would just smear the -1
2251     // to a 0 even if it could be recorded.
2252     if (bci == SynchronizationEntryBCI) bci = 0;
2253 
2254     if (_index >= trace_chunk_size) {
2255       methodHandle mhandle(THREAD, method);
2256       expand(CHECK);
2257       method = mhandle();
2258     }
2259 
2260     _methods->ushort_at_put(_index, method->orig_method_idnum());
2261     _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2262 
2263     // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2264     // klass owning the symbols alive so their refcounts aren't decremented.
2265     Symbol* name = method->name();
2266     _names->symbol_at_put(_index, name);
2267 
2268     // We need to save the mirrors in the backtrace to keep the class
2269     // from being unloaded while we still have this stack trace.
2270     assert(method->method_holder()->java_mirror() != nullptr, "never push null for mirror");
2271     _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2272 
2273     _index++;
2274   }
2275 
2276   void set_has_hidden_top_frame() {
2277     if (!_has_hidden_top_frame) {
2278       // It would be nice to add java/lang/Boolean::TRUE here
2279       // to indicate that this backtrace has a hidden top frame.
2280       // But this code is used before TRUE is allocated.
2281       // Therefore let's just use an arbitrary legal oop
2282       // available right here. _methods is a short[].
2283       assert(_methods != nullptr, "we need a legal oop");
2284       _has_hidden_top_frame = true;
2285       _head->obj_at_put(trace_hidden_offset, _methods);
2286     }
2287   }
2288 };
2289 
2290 struct BacktraceElement : public StackObj {
2291   int _method_id;
2292   int _bci;
2293   int _version;
2294   Symbol* _name;
2295   Handle _mirror;
2296   BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2297                    _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2298 };
2299 
2300 class BacktraceIterator : public StackObj {
2301   int _index;
2302   objArrayHandle  _result;
2303   objArrayHandle  _mirrors;
2304   typeArrayHandle _methods;
2305   typeArrayHandle _bcis;
2306   typeArrayHandle _names;
2307 
2308   void init(objArrayHandle result, Thread* thread) {
2309     // Get method id, bci, version and mirror from chunk
2310     _result = result;
2311     if (_result.not_null()) {
2312       _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2313       _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2314       _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2315       _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2316       _index = 0;
2317     }
2318   }
2319  public:
2320   BacktraceIterator(objArrayHandle result, Thread* thread) {
2321     init(result, thread);
2322     assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2323   }
2324 
2325   BacktraceElement next(Thread* thread) {
2326     BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2327                         _methods->ushort_at(_index),
2328                         Backtrace::version_at(_bcis->int_at(_index)),
2329                         Backtrace::bci_at(_bcis->int_at(_index)),
2330                         _names->symbol_at(_index));
2331     _index++;
2332 
2333     if (_index >= java_lang_Throwable::trace_chunk_size) {
2334       int next_offset = java_lang_Throwable::trace_next_offset;
2335       // Get next chunk
2336       objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2337       init(result, thread);
2338     }
2339     return e;
2340   }
2341 
2342   bool repeat() {
2343     return _result.not_null() && _mirrors->obj_at(_index) != nullptr;
2344   }
2345 };
2346 
2347 
2348 // Print stack trace element to resource allocated buffer
2349 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2350                                           int version, int bci, Symbol* name) {
2351   ResourceMark rm;
2352 
2353   // Get strings and string lengths
2354   InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2355   const char* klass_name  = holder->external_name();
2356   int buf_len = (int)strlen(klass_name);
2357 
2358   char* method_name = name->as_C_string();
2359   buf_len += (int)strlen(method_name);
2360 
2361   char* source_file_name = nullptr;
2362   Symbol* source = Backtrace::get_source_file_name(holder, version);
2363   if (source != nullptr) {
2364     source_file_name = source->as_C_string();
2365     buf_len += (int)strlen(source_file_name);
2366   }
2367 
2368   char *module_name = nullptr, *module_version = nullptr;
2369   ModuleEntry* module = holder->module();
2370   if (module->is_named()) {
2371     module_name = module->name()->as_C_string();
2372     buf_len += (int)strlen(module_name);
2373     if (module->version() != nullptr) {
2374       module_version = module->version()->as_C_string();
2375       buf_len += (int)strlen(module_version);
2376     }
2377   }
2378 
2379   // Allocate temporary buffer with extra space for formatting and line number
2380   const size_t buf_size = buf_len + 64;
2381   char* buf = NEW_RESOURCE_ARRAY(char, buf_size);
2382 
2383   // Print stack trace line in buffer
2384   size_t buf_off = os::snprintf_checked(buf, buf_size, "\tat %s.%s(", klass_name, method_name);
2385 
2386   // Print module information
2387   if (module_name != nullptr) {
2388     if (module_version != nullptr) {
2389       buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s@%s/", module_name, module_version);
2390     } else {
2391       buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s/", module_name);
2392     }
2393   }
2394 
2395   // The method can be null if the requested class version is gone
2396   Method* method = holder->method_with_orig_idnum(method_id, version);
2397   if (!version_matches(method, version)) {
2398     strcat(buf, "Redefined)");
2399   } else {
2400     int line_number = Backtrace::get_line_number(method, bci);
2401     if (line_number == -2) {
2402       strcat(buf, "Native Method)");
2403     } else {
2404       if (source_file_name != nullptr && (line_number != -1)) {
2405         // Sourcename and linenumber
2406         buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s:%d)", source_file_name, line_number);
2407       } else if (source_file_name != nullptr) {
2408         // Just sourcename
2409         buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s)", source_file_name);
2410       } else {
2411         // Neither sourcename nor linenumber
2412         buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "Unknown Source)");
2413       }
2414       CompiledMethod* nm = method->code();
2415       if (WizardMode && nm != nullptr) {
2416         os::snprintf_checked(buf + buf_off, buf_size - buf_off, "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
2417       }
2418     }
2419   }
2420 
2421   st->print_cr("%s", buf);
2422 }
2423 
2424 void java_lang_Throwable::print_stack_element(outputStream *st, Method* method, int bci) {
2425   Handle mirror (Thread::current(),  method->method_holder()->java_mirror());
2426   int method_id = method->orig_method_idnum();
2427   int version = method->constants()->version();
2428   print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2429 }
2430 
2431 /**
2432  * Print the throwable message and its stack trace plus all causes by walking the
2433  * cause chain.  The output looks the same as of Throwable.printStackTrace().
2434  */
2435 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2436   // First, print the message.
2437   print(throwable(), st);
2438   st->cr();
2439 
2440   // Now print the stack trace.
2441   JavaThread* THREAD = JavaThread::current(); // For exception macros.
2442   while (throwable.not_null()) {
2443     objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2444     if (result.is_null()) {
2445       st->print_raw_cr("\t<<no stack trace available>>");
2446       return;
2447     }
2448     BacktraceIterator iter(result, THREAD);
2449 
2450     while (iter.repeat()) {
2451       BacktraceElement bte = iter.next(THREAD);
2452       print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2453     }
2454     if (THREAD->can_call_java()) {
2455       // Call getCause() which doesn't necessarily return the _cause field.
2456       ExceptionMark em(THREAD);
2457       JavaValue cause(T_OBJECT);
2458       JavaCalls::call_virtual(&cause,
2459                               throwable,
2460                               throwable->klass(),
2461                               vmSymbols::getCause_name(),
2462                               vmSymbols::void_throwable_signature(),
2463                               THREAD);
2464       // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2465       if (HAS_PENDING_EXCEPTION) {
2466         CLEAR_PENDING_EXCEPTION;
2467         throwable = Handle();
2468       } else {
2469         throwable = Handle(THREAD, cause.get_oop());
2470         if (throwable.not_null()) {
2471           st->print("Caused by: ");
2472           print(throwable(), st);
2473           st->cr();
2474         }
2475       }
2476     } else {
2477       st->print_raw_cr("<<cannot call Java to get cause>>");
2478       return;
2479     }
2480   }
2481 }
2482 
2483 /**
2484  * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2485  */
2486 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2487   assert(throwable->is_a(vmClasses::Throwable_klass()), "Throwable instance expected");
2488   JavaValue result(T_VOID);
2489   JavaCalls::call_virtual(&result,
2490                           throwable,
2491                           vmClasses::Throwable_klass(),
2492                           vmSymbols::printStackTrace_name(),
2493                           vmSymbols::void_method_signature(),
2494                           THREAD);
2495 }
2496 
2497 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2498   if (!StackTraceInThrowable) return;
2499   ResourceMark rm(THREAD);
2500 
2501   // Start out by clearing the backtrace for this object, in case the VM
2502   // runs out of memory while allocating the stack trace
2503   set_backtrace(throwable(), nullptr);
2504   // Clear lazily constructed Java level stacktrace if refilling occurs
2505   // This is unnecessary in 1.7+ but harmless
2506   clear_stacktrace(throwable());
2507 
2508   int max_depth = MaxJavaStackTraceDepth;
2509   JavaThread* thread = THREAD;
2510 
2511   BacktraceBuilder bt(CHECK);
2512 
2513   // If there is no Java frame just return the method that was being called
2514   // with bci 0
2515   if (!thread->has_last_Java_frame()) {
2516     if (max_depth >= 1 && method() != nullptr) {
2517       bt.push(method(), 0, CHECK);
2518       log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2519       set_depth(throwable(), 1);
2520       set_backtrace(throwable(), bt.backtrace());
2521     }
2522     return;
2523   }
2524 
2525   // Instead of using vframe directly, this version of fill_in_stack_trace
2526   // basically handles everything by hand. This significantly improved the
2527   // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2528   // See bug 6333838 for  more details.
2529   // The "ASSERT" here is to verify this method generates the exactly same stack
2530   // trace as utilizing vframe.
2531 #ifdef ASSERT
2532   vframeStream st(thread, false /* stop_at_java_call_stub */, false /* process_frames */);
2533 #endif
2534   int total_count = 0;
2535   RegisterMap map(thread,
2536                   RegisterMap::UpdateMap::skip,
2537                   RegisterMap::ProcessFrames::skip,
2538                   RegisterMap::WalkContinuation::include);
2539   int decode_offset = 0;
2540   CompiledMethod* nm = nullptr;
2541   bool skip_fillInStackTrace_check = false;
2542   bool skip_throwableInit_check = false;
2543   bool skip_hidden = !ShowHiddenFrames;
2544   bool show_carrier = ShowCarrierFrames;
2545   ContinuationEntry* cont_entry = thread->last_continuation();
2546   for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2547     Method* method = nullptr;
2548     int bci = 0;
2549 
2550     // Compiled java method case.
2551     if (decode_offset != 0) {
2552       DebugInfoReadStream stream(nm, decode_offset);
2553       decode_offset = stream.read_int();
2554       method = (Method*)nm->metadata_at(stream.read_int());
2555       bci = stream.read_bci();
2556     } else {
2557       if (fr.is_first_frame()) break;
2558 
2559       if (Continuation::is_continuation_enterSpecial(fr)) {
2560         assert(cont_entry == Continuation::get_continuation_entry_for_entry_frame(thread, fr), "");
2561         if (!show_carrier && cont_entry->is_virtual_thread()) {
2562           break;
2563         }
2564         cont_entry = cont_entry->parent();
2565       }
2566 
2567       address pc = fr.pc();
2568       if (fr.is_interpreted_frame()) {
2569         address bcp;
2570         if (!map.in_cont()) {
2571           bcp = fr.interpreter_frame_bcp();
2572           method = fr.interpreter_frame_method();
2573         } else {
2574           bcp = map.stack_chunk()->interpreter_frame_bcp(fr);
2575           method = map.stack_chunk()->interpreter_frame_method(fr);
2576         }
2577         bci =  method->bci_from(bcp);
2578         fr = fr.sender(&map);
2579       } else {
2580         CodeBlob* cb = fr.cb();
2581         // HMMM QQQ might be nice to have frame return nm as null if cb is non-null
2582         // but non nmethod
2583         fr = fr.sender(&map);
2584         if (cb == nullptr || !cb->is_compiled()) {
2585           continue;
2586         }
2587         nm = cb->as_compiled_method();
2588         assert(nm->method() != nullptr, "must be");
2589         if (nm->method()->is_native()) {
2590           method = nm->method();
2591           bci = 0;
2592         } else {
2593           PcDesc* pd = nm->pc_desc_at(pc);
2594           decode_offset = pd->scope_decode_offset();
2595           // if decode_offset is not equal to 0, it will execute the
2596           // "compiled java method case" at the beginning of the loop.
2597           continue;
2598         }
2599       }
2600     }
2601 #ifdef ASSERT
2602     if (!st.at_end()) { // TODO LOOM remove once we show only vthread trace
2603       assert(st.method() == method && st.bci() == bci, "Wrong stack trace");
2604       st.next();
2605     }
2606 #endif
2607 
2608     // the format of the stacktrace will be:
2609     // - 1 or more fillInStackTrace frames for the exception class (skipped)
2610     // - 0 or more <init> methods for the exception class (skipped)
2611     // - rest of the stack
2612 
2613     if (!skip_fillInStackTrace_check) {
2614       if (method->name() == vmSymbols::fillInStackTrace_name() &&
2615           throwable->is_a(method->method_holder())) {
2616         continue;
2617       }
2618       else {
2619         skip_fillInStackTrace_check = true; // gone past them all
2620       }
2621     }
2622     if (!skip_throwableInit_check) {
2623       assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2624 
2625       // skip <init> methods of the exception class and superclasses
2626       // This is similar to classic VM.
2627       if (method->name() == vmSymbols::object_initializer_name() &&
2628           throwable->is_a(method->method_holder())) {
2629         continue;
2630       } else {
2631         // there are none or we've seen them all - either way stop checking
2632         skip_throwableInit_check = true;
2633       }
2634     }
2635     if (method->is_hidden() || method->is_continuation_enter_intrinsic()) {
2636       if (skip_hidden) {
2637         if (total_count == 0) {
2638           // The top frame will be hidden from the stack trace.
2639           bt.set_has_hidden_top_frame();
2640         }
2641         continue;
2642       }
2643     }
2644 
2645     bt.push(method, bci, CHECK);
2646     total_count++;
2647   }
2648 
2649   log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2650 
2651   // Put completed stack trace into throwable object
2652   set_backtrace(throwable(), bt.backtrace());
2653   set_depth(throwable(), total_count);
2654 }
2655 
2656 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2657   // No-op if stack trace is disabled
2658   if (!StackTraceInThrowable) {
2659     return;
2660   }
2661 
2662   // Disable stack traces for some preallocated out of memory errors
2663   if (!Universe::should_fill_in_stack_trace(throwable)) {
2664     return;
2665   }
2666 
2667   JavaThread* THREAD = JavaThread::current(); // For exception macros.
2668   PreserveExceptionMark pm(THREAD);
2669 
2670   fill_in_stack_trace(throwable, method, THREAD);
2671   // Ignore exceptions thrown during stack trace filling (OOM) and reinstall the
2672   // original exception via the PreserveExceptionMark destructor.
2673   CLEAR_PENDING_EXCEPTION;
2674 }
2675 
2676 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2677   // Allocate stack trace - backtrace is created but not filled in
2678 
2679   // No-op if stack trace is disabled
2680   if (!StackTraceInThrowable) return;
2681   BacktraceBuilder bt(CHECK);   // creates a backtrace
2682   set_backtrace(throwable(), bt.backtrace());
2683 }
2684 
2685 
2686 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2687   // Fill in stack trace into preallocated backtrace (no GC)
2688 
2689   // No-op if stack trace is disabled
2690   if (!StackTraceInThrowable) return;
2691 
2692   assert(throwable->is_a(vmClasses::Throwable_klass()), "sanity check");
2693 
2694   JavaThread* THREAD = JavaThread::current(); // For exception macros.
2695 
2696   objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2697   assert(backtrace.not_null(), "backtrace should have been preallocated");
2698 
2699   ResourceMark rm(THREAD);
2700   vframeStream st(THREAD, false /* stop_at_java_call_stub */, false /* process_frames */);
2701 
2702   BacktraceBuilder bt(THREAD, backtrace);
2703 
2704   // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2705   // methods as preallocated errors aren't created by "java" code.
2706 
2707   // fill in as much stack trace as possible
2708   int chunk_count = 0;
2709   for (;!st.at_end(); st.next()) {
2710     bt.push(st.method(), st.bci(), CHECK);
2711     chunk_count++;
2712 
2713     // Bail-out for deep stacks
2714     if (chunk_count >= trace_chunk_size) break;
2715   }
2716   set_depth(throwable(), chunk_count);
2717   log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2718 
2719   // We support the Throwable immutability protocol defined for Java 7.
2720   java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2721   assert(java_lang_Throwable::unassigned_stacktrace() != nullptr, "not initialized");
2722 }
2723 
2724 void java_lang_Throwable::get_stack_trace_elements(int depth, Handle backtrace,
2725                                                    objArrayHandle stack_trace_array_h, TRAPS) {
2726 
2727   if (backtrace.is_null() || stack_trace_array_h.is_null()) {
2728     THROW(vmSymbols::java_lang_NullPointerException());
2729   }
2730 
2731   assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2732 
2733   if (stack_trace_array_h->length() != depth) {
2734     THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2735   }
2736 
2737   objArrayHandle result(THREAD, objArrayOop(backtrace()));
2738   BacktraceIterator iter(result, THREAD);
2739 
2740   int index = 0;
2741   while (iter.repeat()) {
2742     BacktraceElement bte = iter.next(THREAD);
2743 
2744     Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2745 
2746     if (stack_trace_element.is_null()) {
2747       THROW(vmSymbols::java_lang_NullPointerException());
2748     }
2749 
2750     InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2751     methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2752 
2753     java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2754                                          method,
2755                                          bte._version,
2756                                          bte._bci,
2757                                          bte._name,
2758                                          CHECK);
2759   }
2760 }
2761 
2762 Handle java_lang_Throwable::create_initialization_error(JavaThread* current, Handle throwable) {
2763   // Creates an ExceptionInInitializerError to be recorded as the initialization error when class initialization
2764   // failed due to the passed in 'throwable'. We cannot save 'throwable' directly due to issues with keeping alive
2765   // all objects referenced via its stacktrace. So instead we save a new EIIE instance, with the same message and
2766   // symbolic stacktrace of 'throwable'.
2767   assert(throwable.not_null(), "shouldn't be");
2768 
2769   // Now create the message from the original exception and thread name.
2770   ResourceMark rm(current);
2771   const char *message = nullptr;
2772   oop detailed_message = java_lang_Throwable::message(throwable());
2773   if (detailed_message != nullptr) {
2774     message = java_lang_String::as_utf8_string(detailed_message);
2775   }
2776   stringStream st;
2777   st.print("Exception %s%s ", throwable()->klass()->name()->as_klass_external_name(),
2778              message == nullptr ? "" : ":");
2779   if (message == nullptr) {
2780     st.print("[in thread \"%s\"]", current->name());
2781   } else {
2782     st.print("%s [in thread \"%s\"]", message, current->name());
2783   }
2784 
2785   Symbol* exception_name = vmSymbols::java_lang_ExceptionInInitializerError();
2786   Handle init_error = Exceptions::new_exception(current, exception_name, st.as_string());
2787   // If new_exception returns a different exception while creating the exception,
2788   // abandon the attempt to save the initialization error and return null.
2789   if (init_error->klass()->name() != exception_name) {
2790     log_info(class, init)("Exception %s thrown while saving initialization exception",
2791                         init_error->klass()->external_name());
2792     return Handle();
2793   }
2794 
2795   // Call to java to fill in the stack trace and clear declaringClassObject to
2796   // not keep classes alive in the stack trace.
2797   // call this:  public StackTraceElement[] getStackTrace()
2798   JavaValue result(T_ARRAY);
2799   JavaCalls::call_virtual(&result, throwable,
2800                           vmClasses::Throwable_klass(),
2801                           vmSymbols::getStackTrace_name(),
2802                           vmSymbols::getStackTrace_signature(),
2803                           current);
2804   if (!current->has_pending_exception()){
2805     Handle stack_trace(current, result.get_oop());
2806     assert(stack_trace->is_objArray(), "Should be an array");
2807     java_lang_Throwable::set_stacktrace(init_error(), stack_trace());
2808     // Clear backtrace because the stacktrace should be used instead.
2809     set_backtrace(init_error(), nullptr);
2810   } else {
2811     log_info(class, init)("Exception thrown while getting stack trace for initialization exception %s",
2812                         init_error->klass()->external_name());
2813     current->clear_pending_exception();
2814   }
2815 
2816   return init_error;
2817 }
2818 
2819 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) {
2820   JavaThread* current = JavaThread::current();
2821   objArrayHandle result(current, objArrayOop(backtrace(throwable)));
2822   BacktraceIterator iter(result, current);
2823   // No backtrace available.
2824   if (!iter.repeat()) return false;
2825 
2826   // If the exception happened in a frame that has been hidden, i.e.,
2827   // omitted from the back trace, we can not compute the message.
2828   oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset);
2829   if (hidden != nullptr) {
2830     return false;
2831   }
2832 
2833   // Get first backtrace element.
2834   BacktraceElement bte = iter.next(current);
2835 
2836   InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2837   assert(holder != nullptr, "first element should be non-null");
2838   Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version);
2839 
2840   // Original version is no longer available.
2841   if (m == nullptr || !version_matches(m, bte._version)) {
2842     return false;
2843   }
2844 
2845   *method = m;
2846   *bci = bte._bci;
2847   return true;
2848 }
2849 
2850 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
2851   // Allocate java.lang.StackTraceElement instance
2852   InstanceKlass* k = vmClasses::StackTraceElement_klass();
2853   assert(k != nullptr, "must be loaded in 1.4+");
2854   if (k->should_be_initialized()) {
2855     k->initialize(CHECK_NULL);
2856   }
2857 
2858   Handle element = k->allocate_instance_handle(CHECK_NULL);
2859 
2860   int version = method->constants()->version();
2861   fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_NULL);
2862   return element();
2863 }
2864 
2865 void java_lang_StackTraceElement::fill_in(Handle element,
2866                                           InstanceKlass* holder, const methodHandle& method,
2867                                           int version, int bci, Symbol* name, TRAPS) {
2868   assert(element->is_a(vmClasses::StackTraceElement_klass()), "sanity check");
2869 
2870   ResourceMark rm(THREAD);
2871   HandleMark hm(THREAD);
2872 
2873   // Fill in class name
2874   Handle java_class(THREAD, holder->java_mirror());
2875   oop classname = java_lang_Class::name(java_class, CHECK);
2876   java_lang_StackTraceElement::set_declaringClass(element(), classname);
2877   java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
2878 
2879   oop loader = holder->class_loader();
2880   if (loader != nullptr) {
2881     oop loader_name = java_lang_ClassLoader::name(loader);
2882     if (loader_name != nullptr)
2883       java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
2884   }
2885 
2886   // Fill in method name
2887   oop methodname = StringTable::intern(name, CHECK);
2888   java_lang_StackTraceElement::set_methodName(element(), methodname);
2889 
2890   // Fill in module name and version
2891   ModuleEntry* module = holder->module();
2892   if (module->is_named()) {
2893     oop module_name = StringTable::intern(module->name(), CHECK);
2894     java_lang_StackTraceElement::set_moduleName(element(), module_name);
2895     oop module_version;
2896     if (module->version() != nullptr) {
2897       module_version = StringTable::intern(module->version(), CHECK);
2898     } else {
2899       module_version = nullptr;
2900     }
2901     java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
2902   }
2903 
2904   if (method() == nullptr || !version_matches(method(), version)) {
2905     // The method was redefined, accurate line number information isn't available
2906     java_lang_StackTraceElement::set_fileName(element(), nullptr);
2907     java_lang_StackTraceElement::set_lineNumber(element(), -1);
2908   } else {
2909     Symbol* source;
2910     oop source_file;
2911     int line_number;
2912     decode_file_and_line(java_class, holder, version, method, bci, source, source_file, line_number, CHECK);
2913 
2914     java_lang_StackTraceElement::set_fileName(element(), source_file);
2915     java_lang_StackTraceElement::set_lineNumber(element(), line_number);
2916   }
2917 }
2918 
2919 void java_lang_StackTraceElement::decode_file_and_line(Handle java_class,
2920                                                        InstanceKlass* holder,
2921                                                        int version,
2922                                                        const methodHandle& method,
2923                                                        int bci,
2924                                                        Symbol*& source,
2925                                                        oop& source_file,
2926                                                        int& line_number, TRAPS) {
2927   // Fill in source file name and line number.
2928   source = Backtrace::get_source_file_name(holder, version);
2929   source_file = java_lang_Class::source_file(java_class());
2930   if (source != nullptr) {
2931     // Class was not redefined. We can trust its cache if set,
2932     // else we have to initialize it.
2933     if (source_file == nullptr) {
2934       source_file = StringTable::intern(source, CHECK);
2935       java_lang_Class::set_source_file(java_class(), source_file);
2936     }
2937   } else {
2938     // Class was redefined. Dump the cache if it was set.
2939     if (source_file != nullptr) {
2940       source_file = nullptr;
2941       java_lang_Class::set_source_file(java_class(), source_file);
2942     }
2943   }
2944   line_number = Backtrace::get_line_number(method(), bci);
2945 }
2946 
2947 #if INCLUDE_JVMCI
2948 void java_lang_StackTraceElement::decode(const methodHandle& method, int bci,
2949                                          Symbol*& filename, int& line_number, TRAPS) {
2950   ResourceMark rm(THREAD);
2951   HandleMark hm(THREAD);
2952 
2953   filename = nullptr;
2954   line_number = -1;
2955 
2956   oop source_file;
2957   int version = method->constants()->version();
2958   InstanceKlass* holder = method->method_holder();
2959   Handle java_class(THREAD, holder->java_mirror());
2960   decode_file_and_line(java_class, holder, version, method, bci, filename, source_file, line_number, CHECK);
2961 }
2962 #endif // INCLUDE_JVMCI
2963 
2964 // java_lang_ClassFrameInfo
2965 
2966 int java_lang_ClassFrameInfo::_classOrMemberName_offset;
2967 int java_lang_ClassFrameInfo::_flags_offset;
2968 
2969 #define CLASSFRAMEINFO_FIELDS_DO(macro) \
2970   macro(_classOrMemberName_offset, k, "classOrMemberName", object_signature,  false); \
2971   macro(_flags_offset,             k, vmSymbols::flags_name(), int_signature, false)
2972 
2973 void java_lang_ClassFrameInfo::compute_offsets() {
2974   InstanceKlass* k = vmClasses::ClassFrameInfo_klass();
2975   CLASSFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2976 }
2977 
2978 #if INCLUDE_CDS
2979 void java_lang_ClassFrameInfo::serialize_offsets(SerializeClosure* f) {
2980   CLASSFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2981 }
2982 #endif
2983 
2984 static int get_flags(const methodHandle& m) {
2985   int flags = (jushort)( m->access_flags().as_short() & JVM_RECOGNIZED_METHOD_MODIFIERS );
2986   if (m->is_initializer()) {
2987     flags |= java_lang_invoke_MemberName::MN_IS_CONSTRUCTOR;
2988   } else {
2989     flags |= java_lang_invoke_MemberName::MN_IS_METHOD;
2990   }
2991   if (m->caller_sensitive()) {
2992     flags |= java_lang_invoke_MemberName::MN_CALLER_SENSITIVE;
2993   }
2994   if (m->is_hidden()) {
2995     flags |= java_lang_invoke_MemberName::MN_HIDDEN_MEMBER;
2996   }
2997   assert((flags & 0xFF000000) == 0, "unexpected flags");
2998   return flags;
2999 }
3000 
3001 oop java_lang_ClassFrameInfo::classOrMemberName(oop obj) {
3002   return obj->obj_field(_classOrMemberName_offset);
3003 }
3004 
3005 int java_lang_ClassFrameInfo::flags(oop obj) {
3006   return obj->int_field(_flags_offset);
3007 }
3008 
3009 void java_lang_ClassFrameInfo::init_class(Handle stackFrame, const methodHandle& m) {
3010   stackFrame->obj_field_put(_classOrMemberName_offset, m->method_holder()->java_mirror());
3011   // flags is initialized when ClassFrameInfo object is constructed and retain the value
3012   int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3013   stackFrame->int_field_put(_flags_offset, flags);
3014 }
3015 
3016 void java_lang_ClassFrameInfo::init_method(Handle stackFrame, const methodHandle& m, TRAPS) {
3017   oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(m, CHECK);
3018   stackFrame->obj_field_put(_classOrMemberName_offset, rmethod_name);
3019   // flags is initialized when ClassFrameInfo object is constructed and retain the value
3020   int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3021   stackFrame->int_field_put(_flags_offset, flags);
3022 }
3023 
3024 
3025 // java_lang_StackFrameInfo
3026 
3027 int java_lang_StackFrameInfo::_type_offset;
3028 int java_lang_StackFrameInfo::_name_offset;
3029 int java_lang_StackFrameInfo::_bci_offset;
3030 int java_lang_StackFrameInfo::_version_offset;
3031 int java_lang_StackFrameInfo::_contScope_offset;
3032 
3033 #define STACKFRAMEINFO_FIELDS_DO(macro) \
3034   macro(_type_offset,       k, "type",       object_signature,            false); \
3035   macro(_name_offset,       k, "name",       string_signature,            false); \
3036   macro(_bci_offset,        k, "bci",        int_signature,               false); \
3037   macro(_contScope_offset,  k, "contScope",  continuationscope_signature, false)
3038 
3039 void java_lang_StackFrameInfo::compute_offsets() {
3040   InstanceKlass* k = vmClasses::StackFrameInfo_klass();
3041   STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3042   STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3043 }
3044 
3045 #if INCLUDE_CDS
3046 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
3047   STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3048   STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3049 }
3050 #endif
3051 
3052 Method* java_lang_StackFrameInfo::get_method(oop obj) {
3053   oop m = java_lang_ClassFrameInfo::classOrMemberName(obj);
3054   Method* method = java_lang_invoke_ResolvedMethodName::vmtarget(m);
3055   return method;
3056 }
3057 
3058 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS) {
3059   // set Method* or mid/cpref
3060   HandleMark hm(THREAD);
3061   Handle cont_h(THREAD, cont);
3062   java_lang_ClassFrameInfo::init_method(stackFrame, method, CHECK);
3063 
3064   // set bci
3065   java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
3066   // method may be redefined; store the version
3067   int version = method->constants()->version();
3068   assert((jushort)version == version, "version should be short");
3069   java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
3070 
3071   oop contScope = cont_h() != nullptr ? jdk_internal_vm_Continuation::scope(cont_h()) : (oop)nullptr;
3072   java_lang_StackFrameInfo::set_contScope(stackFrame(), contScope);
3073 }
3074 
3075 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
3076   ResourceMark rm(THREAD);
3077   HandleMark hm(THREAD);
3078 
3079   Method* method = java_lang_StackFrameInfo::get_method(stackFrame());
3080   InstanceKlass* holder = method->method_holder();
3081   short version = stackFrame->short_field(_version_offset);
3082   int bci = stackFrame->int_field(_bci_offset);
3083   Symbol* name = method->name();
3084   java_lang_StackTraceElement::fill_in(stack_trace_element, holder, methodHandle(THREAD, method), version, bci, name, CHECK);
3085 }
3086 
3087 oop java_lang_StackFrameInfo::type(oop obj) {
3088   return obj->obj_field(_type_offset);
3089 }
3090 
3091 void java_lang_StackFrameInfo::set_type(oop obj, oop value) {
3092   obj->obj_field_put(_type_offset, value);
3093 }
3094 
3095 oop java_lang_StackFrameInfo::name(oop obj) {
3096   return obj->obj_field(_name_offset);
3097 }
3098 
3099 void java_lang_StackFrameInfo::set_name(oop obj, oop value) {
3100   obj->obj_field_put(_name_offset, value);
3101 }
3102 
3103 void java_lang_StackFrameInfo::set_version(oop obj, short value) {
3104   obj->short_field_put(_version_offset, value);
3105 }
3106 
3107 void java_lang_StackFrameInfo::set_bci(oop obj, int value) {
3108   assert(value >= 0 && value < max_jushort, "must be a valid bci value");
3109   obj->int_field_put(_bci_offset, value);
3110 }
3111 
3112 void java_lang_StackFrameInfo::set_contScope(oop obj, oop value) {
3113   obj->obj_field_put(_contScope_offset, value);
3114 }
3115 
3116 int java_lang_LiveStackFrameInfo::_monitors_offset;
3117 int java_lang_LiveStackFrameInfo::_locals_offset;
3118 int java_lang_LiveStackFrameInfo::_operands_offset;
3119 int java_lang_LiveStackFrameInfo::_mode_offset;
3120 
3121 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
3122   macro(_monitors_offset,   k, "monitors",    object_array_signature, false); \
3123   macro(_locals_offset,     k, "locals",      object_array_signature, false); \
3124   macro(_operands_offset,   k, "operands",    object_array_signature, false); \
3125   macro(_mode_offset,       k, "mode",        int_signature,          false)
3126 
3127 void java_lang_LiveStackFrameInfo::compute_offsets() {
3128   InstanceKlass* k = vmClasses::LiveStackFrameInfo_klass();
3129   LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3130 }
3131 
3132 #if INCLUDE_CDS
3133 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
3134   LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3135 }
3136 #endif
3137 
3138 void java_lang_LiveStackFrameInfo::set_monitors(oop obj, oop value) {
3139   obj->obj_field_put(_monitors_offset, value);
3140 }
3141 
3142 void java_lang_LiveStackFrameInfo::set_locals(oop obj, oop value) {
3143   obj->obj_field_put(_locals_offset, value);
3144 }
3145 
3146 void java_lang_LiveStackFrameInfo::set_operands(oop obj, oop value) {
3147   obj->obj_field_put(_operands_offset, value);
3148 }
3149 
3150 void java_lang_LiveStackFrameInfo::set_mode(oop obj, int value) {
3151   obj->int_field_put(_mode_offset, value);
3152 }
3153 
3154 
3155 // java_lang_AccessibleObject
3156 
3157 int java_lang_reflect_AccessibleObject::_override_offset;
3158 
3159 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
3160   macro(_override_offset, k, "override", bool_signature, false)
3161 
3162 void java_lang_reflect_AccessibleObject::compute_offsets() {
3163   InstanceKlass* k = vmClasses::reflect_AccessibleObject_klass();
3164   ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3165 }
3166 
3167 #if INCLUDE_CDS
3168 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
3169   ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3170 }
3171 #endif
3172 
3173 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
3174   return (jboolean) reflect->bool_field(_override_offset);
3175 }
3176 
3177 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
3178   reflect->bool_field_put(_override_offset, (int) value);
3179 }
3180 
3181 // java_lang_reflect_Method
3182 
3183 int java_lang_reflect_Method::_clazz_offset;
3184 int java_lang_reflect_Method::_name_offset;
3185 int java_lang_reflect_Method::_returnType_offset;
3186 int java_lang_reflect_Method::_parameterTypes_offset;
3187 int java_lang_reflect_Method::_exceptionTypes_offset;
3188 int java_lang_reflect_Method::_slot_offset;
3189 int java_lang_reflect_Method::_modifiers_offset;
3190 int java_lang_reflect_Method::_signature_offset;
3191 int java_lang_reflect_Method::_annotations_offset;
3192 int java_lang_reflect_Method::_parameter_annotations_offset;
3193 int java_lang_reflect_Method::_annotation_default_offset;
3194 
3195 #define METHOD_FIELDS_DO(macro) \
3196   macro(_clazz_offset,          k, vmSymbols::clazz_name(),          class_signature,       false); \
3197   macro(_name_offset,           k, vmSymbols::name_name(),           string_signature,      false); \
3198   macro(_returnType_offset,     k, vmSymbols::returnType_name(),     class_signature,       false); \
3199   macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3200   macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3201   macro(_slot_offset,           k, vmSymbols::slot_name(),           int_signature,         false); \
3202   macro(_modifiers_offset,      k, vmSymbols::modifiers_name(),      int_signature,         false); \
3203   macro(_signature_offset,             k, vmSymbols::signature_name(),             string_signature,     false); \
3204   macro(_annotations_offset,           k, vmSymbols::annotations_name(),           byte_array_signature, false); \
3205   macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
3206   macro(_annotation_default_offset,    k, vmSymbols::annotation_default_name(),    byte_array_signature, false);
3207 
3208 void java_lang_reflect_Method::compute_offsets() {
3209   InstanceKlass* k = vmClasses::reflect_Method_klass();
3210   METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3211 }
3212 
3213 #if INCLUDE_CDS
3214 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
3215   METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3216 }
3217 #endif
3218 
3219 Handle java_lang_reflect_Method::create(TRAPS) {
3220   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3221   Klass* klass = vmClasses::reflect_Method_klass();
3222   // This class is eagerly initialized during VM initialization, since we keep a reference
3223   // to one of the methods
3224   assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
3225   return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
3226 }
3227 
3228 oop java_lang_reflect_Method::clazz(oop reflect) {
3229   return reflect->obj_field(_clazz_offset);
3230 }
3231 
3232 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
3233    reflect->obj_field_put(_clazz_offset, value);
3234 }
3235 
3236 int java_lang_reflect_Method::slot(oop reflect) {
3237   return reflect->int_field(_slot_offset);
3238 }
3239 
3240 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
3241   reflect->int_field_put(_slot_offset, value);
3242 }
3243 
3244 void java_lang_reflect_Method::set_name(oop method, oop value) {
3245   method->obj_field_put(_name_offset, value);
3246 }
3247 
3248 oop java_lang_reflect_Method::return_type(oop method) {
3249   return method->obj_field(_returnType_offset);
3250 }
3251 
3252 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
3253   method->obj_field_put(_returnType_offset, value);
3254 }
3255 
3256 oop java_lang_reflect_Method::parameter_types(oop method) {
3257   return method->obj_field(_parameterTypes_offset);
3258 }
3259 
3260 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
3261   method->obj_field_put(_parameterTypes_offset, value);
3262 }
3263 
3264 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
3265   method->obj_field_put(_exceptionTypes_offset, value);
3266 }
3267 
3268 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
3269   method->int_field_put(_modifiers_offset, value);
3270 }
3271 
3272 void java_lang_reflect_Method::set_signature(oop method, oop value) {
3273   method->obj_field_put(_signature_offset, value);
3274 }
3275 
3276 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
3277   method->obj_field_put(_annotations_offset, value);
3278 }
3279 
3280 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
3281   method->obj_field_put(_parameter_annotations_offset, value);
3282 }
3283 
3284 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
3285   method->obj_field_put(_annotation_default_offset, value);
3286 }
3287 
3288 int java_lang_reflect_Constructor::_clazz_offset;
3289 int java_lang_reflect_Constructor::_parameterTypes_offset;
3290 int java_lang_reflect_Constructor::_exceptionTypes_offset;
3291 int java_lang_reflect_Constructor::_slot_offset;
3292 int java_lang_reflect_Constructor::_modifiers_offset;
3293 int java_lang_reflect_Constructor::_signature_offset;
3294 int java_lang_reflect_Constructor::_annotations_offset;
3295 int java_lang_reflect_Constructor::_parameter_annotations_offset;
3296 
3297 #define CONSTRUCTOR_FIELDS_DO(macro) \
3298   macro(_clazz_offset,          k, vmSymbols::clazz_name(),          class_signature,       false); \
3299   macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3300   macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3301   macro(_slot_offset,           k, vmSymbols::slot_name(),           int_signature,         false); \
3302   macro(_modifiers_offset,      k, vmSymbols::modifiers_name(),      int_signature,         false); \
3303   macro(_signature_offset,             k, vmSymbols::signature_name(),             string_signature,     false); \
3304   macro(_annotations_offset,           k, vmSymbols::annotations_name(),           byte_array_signature, false); \
3305   macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
3306 
3307 void java_lang_reflect_Constructor::compute_offsets() {
3308   InstanceKlass* k = vmClasses::reflect_Constructor_klass();
3309   CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3310 }
3311 
3312 #if INCLUDE_CDS
3313 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
3314   CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3315 }
3316 #endif
3317 
3318 Handle java_lang_reflect_Constructor::create(TRAPS) {
3319   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3320   Symbol* name = vmSymbols::java_lang_reflect_Constructor();
3321   Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3322   InstanceKlass* ik = InstanceKlass::cast(k);
3323   // Ensure it is initialized
3324   ik->initialize(CHECK_NH);
3325   return ik->allocate_instance_handle(THREAD);
3326 }
3327 
3328 oop java_lang_reflect_Constructor::clazz(oop reflect) {
3329   return reflect->obj_field(_clazz_offset);
3330 }
3331 
3332 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
3333    reflect->obj_field_put(_clazz_offset, value);
3334 }
3335 
3336 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
3337   return constructor->obj_field(_parameterTypes_offset);
3338 }
3339 
3340 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
3341   constructor->obj_field_put(_parameterTypes_offset, value);
3342 }
3343 
3344 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
3345   constructor->obj_field_put(_exceptionTypes_offset, value);
3346 }
3347 
3348 int java_lang_reflect_Constructor::slot(oop reflect) {
3349   return reflect->int_field(_slot_offset);
3350 }
3351 
3352 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
3353   reflect->int_field_put(_slot_offset, value);
3354 }
3355 
3356 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
3357   constructor->int_field_put(_modifiers_offset, value);
3358 }
3359 
3360 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
3361   constructor->obj_field_put(_signature_offset, value);
3362 }
3363 
3364 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
3365   constructor->obj_field_put(_annotations_offset, value);
3366 }
3367 
3368 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
3369   method->obj_field_put(_parameter_annotations_offset, value);
3370 }
3371 
3372 int java_lang_reflect_Field::_clazz_offset;
3373 int java_lang_reflect_Field::_name_offset;
3374 int java_lang_reflect_Field::_type_offset;
3375 int java_lang_reflect_Field::_slot_offset;
3376 int java_lang_reflect_Field::_modifiers_offset;
3377 int java_lang_reflect_Field::_trusted_final_offset;
3378 int java_lang_reflect_Field::_signature_offset;
3379 int java_lang_reflect_Field::_annotations_offset;
3380 
3381 #define FIELD_FIELDS_DO(macro) \
3382   macro(_clazz_offset,     k, vmSymbols::clazz_name(),     class_signature,  false); \
3383   macro(_name_offset,      k, vmSymbols::name_name(),      string_signature, false); \
3384   macro(_type_offset,      k, vmSymbols::type_name(),      class_signature,  false); \
3385   macro(_slot_offset,      k, vmSymbols::slot_name(),      int_signature,    false); \
3386   macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature,    false); \
3387   macro(_trusted_final_offset,    k, vmSymbols::trusted_final_name(),    bool_signature,       false); \
3388   macro(_signature_offset,        k, vmSymbols::signature_name(),        string_signature,     false); \
3389   macro(_annotations_offset,      k, vmSymbols::annotations_name(),      byte_array_signature, false);
3390 
3391 void java_lang_reflect_Field::compute_offsets() {
3392   InstanceKlass* k = vmClasses::reflect_Field_klass();
3393   FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3394 }
3395 
3396 #if INCLUDE_CDS
3397 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
3398   FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3399 }
3400 #endif
3401 
3402 Handle java_lang_reflect_Field::create(TRAPS) {
3403   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3404   Symbol* name = vmSymbols::java_lang_reflect_Field();
3405   Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3406   InstanceKlass* ik = InstanceKlass::cast(k);
3407   // Ensure it is initialized
3408   ik->initialize(CHECK_NH);
3409   return ik->allocate_instance_handle(THREAD);
3410 }
3411 
3412 oop java_lang_reflect_Field::clazz(oop reflect) {
3413   return reflect->obj_field(_clazz_offset);
3414 }
3415 
3416 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
3417   reflect->obj_field_put(_clazz_offset, value);
3418 }
3419 
3420 oop java_lang_reflect_Field::name(oop field) {
3421   return field->obj_field(_name_offset);
3422 }
3423 
3424 void java_lang_reflect_Field::set_name(oop field, oop value) {
3425   field->obj_field_put(_name_offset, value);
3426 }
3427 
3428 oop java_lang_reflect_Field::type(oop field) {
3429   return field->obj_field(_type_offset);
3430 }
3431 
3432 void java_lang_reflect_Field::set_type(oop field, oop value) {
3433   field->obj_field_put(_type_offset, value);
3434 }
3435 
3436 int java_lang_reflect_Field::slot(oop reflect) {
3437   return reflect->int_field(_slot_offset);
3438 }
3439 
3440 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
3441   reflect->int_field_put(_slot_offset, value);
3442 }
3443 
3444 int java_lang_reflect_Field::modifiers(oop field) {
3445   return field->int_field(_modifiers_offset);
3446 }
3447 
3448 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
3449   field->int_field_put(_modifiers_offset, value);
3450 }
3451 
3452 void java_lang_reflect_Field::set_trusted_final(oop field) {
3453   field->bool_field_put(_trusted_final_offset, true);
3454 }
3455 
3456 void java_lang_reflect_Field::set_signature(oop field, oop value) {
3457   field->obj_field_put(_signature_offset, value);
3458 }
3459 
3460 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
3461   field->obj_field_put(_annotations_offset, value);
3462 }
3463 
3464 oop java_lang_reflect_RecordComponent::create(InstanceKlass* holder, RecordComponent* component, TRAPS) {
3465   // Allocate java.lang.reflect.RecordComponent instance
3466   HandleMark hm(THREAD);
3467   InstanceKlass* ik = vmClasses::RecordComponent_klass();
3468   assert(ik != nullptr, "must be loaded");
3469   ik->initialize(CHECK_NULL);
3470 
3471   Handle element = ik->allocate_instance_handle(CHECK_NULL);
3472 
3473   Handle decl_class(THREAD, holder->java_mirror());
3474   java_lang_reflect_RecordComponent::set_clazz(element(), decl_class());
3475 
3476   Symbol* name = holder->constants()->symbol_at(component->name_index()); // name_index is a utf8
3477   oop component_name = StringTable::intern(name, CHECK_NULL);
3478   java_lang_reflect_RecordComponent::set_name(element(), component_name);
3479 
3480   Symbol* type = holder->constants()->symbol_at(component->descriptor_index());
3481   Handle component_type_h =
3482     SystemDictionary::find_java_mirror_for_type(type, holder, SignatureStream::NCDFError, CHECK_NULL);
3483   java_lang_reflect_RecordComponent::set_type(element(), component_type_h());
3484 
3485   Method* accessor_method = nullptr;
3486   {
3487     // Prepend "()" to type to create the full method signature.
3488     ResourceMark rm(THREAD);
3489     int sig_len = type->utf8_length() + 3; // "()" and null char
3490     char* sig = NEW_RESOURCE_ARRAY(char, sig_len);
3491     jio_snprintf(sig, sig_len, "%c%c%s", JVM_SIGNATURE_FUNC, JVM_SIGNATURE_ENDFUNC, type->as_C_string());
3492     TempNewSymbol full_sig = SymbolTable::new_symbol(sig);
3493     accessor_method = holder->find_instance_method(name, full_sig, Klass::PrivateLookupMode::find);
3494   }
3495 
3496   if (accessor_method != nullptr) {
3497     methodHandle method(THREAD, accessor_method);
3498     oop m = Reflection::new_method(method, false, CHECK_NULL);
3499     java_lang_reflect_RecordComponent::set_accessor(element(), m);
3500   } else {
3501     java_lang_reflect_RecordComponent::set_accessor(element(), nullptr);
3502   }
3503 
3504   int sig_index = component->generic_signature_index();
3505   if (sig_index > 0) {
3506     Symbol* sig = holder->constants()->symbol_at(sig_index); // sig_index is a utf8
3507     oop component_sig = StringTable::intern(sig, CHECK_NULL);
3508     java_lang_reflect_RecordComponent::set_signature(element(), component_sig);
3509   } else {
3510     java_lang_reflect_RecordComponent::set_signature(element(), nullptr);
3511   }
3512 
3513   typeArrayOop annotation_oop = Annotations::make_java_array(component->annotations(), CHECK_NULL);
3514   java_lang_reflect_RecordComponent::set_annotations(element(), annotation_oop);
3515 
3516   typeArrayOop type_annotation_oop = Annotations::make_java_array(component->type_annotations(), CHECK_NULL);
3517   java_lang_reflect_RecordComponent::set_typeAnnotations(element(), type_annotation_oop);
3518 
3519   return element();
3520 }
3521 
3522 int reflect_ConstantPool::_oop_offset;
3523 
3524 #define CONSTANTPOOL_FIELDS_DO(macro) \
3525   macro(_oop_offset, k, "constantPoolOop", object_signature, false)
3526 
3527 void reflect_ConstantPool::compute_offsets() {
3528   InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3529   // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
3530   CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3531 }
3532 
3533 #if INCLUDE_CDS
3534 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3535   CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3536 }
3537 #endif
3538 
3539 int java_lang_reflect_Parameter::_name_offset;
3540 int java_lang_reflect_Parameter::_modifiers_offset;
3541 int java_lang_reflect_Parameter::_index_offset;
3542 int java_lang_reflect_Parameter::_executable_offset;
3543 
3544 #define PARAMETER_FIELDS_DO(macro) \
3545   macro(_name_offset,        k, vmSymbols::name_name(),        string_signature, false); \
3546   macro(_modifiers_offset,   k, vmSymbols::modifiers_name(),   int_signature,    false); \
3547   macro(_index_offset,       k, vmSymbols::index_name(),       int_signature,    false); \
3548   macro(_executable_offset,  k, vmSymbols::executable_name(),  executable_signature, false)
3549 
3550 void java_lang_reflect_Parameter::compute_offsets() {
3551   InstanceKlass* k = vmClasses::reflect_Parameter_klass();
3552   PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3553 }
3554 
3555 #if INCLUDE_CDS
3556 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3557   PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3558 }
3559 #endif
3560 
3561 Handle java_lang_reflect_Parameter::create(TRAPS) {
3562   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3563   Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3564   Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3565   InstanceKlass* ik = InstanceKlass::cast(k);
3566   // Ensure it is initialized
3567   ik->initialize(CHECK_NH);
3568   return ik->allocate_instance_handle(THREAD);
3569 }
3570 
3571 oop java_lang_reflect_Parameter::name(oop param) {
3572   return param->obj_field(_name_offset);
3573 }
3574 
3575 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3576   param->obj_field_put(_name_offset, value);
3577 }
3578 
3579 int java_lang_reflect_Parameter::modifiers(oop param) {
3580   return param->int_field(_modifiers_offset);
3581 }
3582 
3583 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3584   param->int_field_put(_modifiers_offset, value);
3585 }
3586 
3587 int java_lang_reflect_Parameter::index(oop param) {
3588   return param->int_field(_index_offset);
3589 }
3590 
3591 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3592   param->int_field_put(_index_offset, value);
3593 }
3594 
3595 oop java_lang_reflect_Parameter::executable(oop param) {
3596   return param->obj_field(_executable_offset);
3597 }
3598 
3599 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3600   param->obj_field_put(_executable_offset, value);
3601 }
3602 
3603 // java_lang_Module
3604 
3605 int java_lang_Module::_loader_offset;
3606 int java_lang_Module::_name_offset;
3607 int java_lang_Module::_module_entry_offset;
3608 
3609 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3610   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3611   return JavaCalls::construct_new_instance(vmClasses::Module_klass(),
3612                           vmSymbols::java_lang_module_init_signature(),
3613                           loader, module_name, CHECK_NH);
3614 }
3615 
3616 #define MODULE_FIELDS_DO(macro) \
3617   macro(_loader_offset,  k, vmSymbols::loader_name(),  classloader_signature, false); \
3618   macro(_name_offset,    k, vmSymbols::name_name(),    string_signature,      false)
3619 
3620 void java_lang_Module::compute_offsets() {
3621   InstanceKlass* k = vmClasses::Module_klass();
3622   MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3623   MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3624 }
3625 
3626 #if INCLUDE_CDS
3627 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3628   MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3629   MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3630 }
3631 #endif
3632 
3633 oop java_lang_Module::loader(oop module) {
3634   return module->obj_field(_loader_offset);
3635 }
3636 
3637 void java_lang_Module::set_loader(oop module, oop value) {
3638   module->obj_field_put(_loader_offset, value);
3639 }
3640 
3641 oop java_lang_Module::name(oop module) {
3642   return module->obj_field(_name_offset);
3643 }
3644 
3645 void java_lang_Module::set_name(oop module, oop value) {
3646   module->obj_field_put(_name_offset, value);
3647 }
3648 
3649 ModuleEntry* java_lang_Module::module_entry_raw(oop module) {
3650   assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3651   assert(module != nullptr, "module can't be null");
3652   assert(oopDesc::is_oop(module), "module must be oop");
3653 
3654   ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3655   return module_entry;
3656 }
3657 
3658 ModuleEntry* java_lang_Module::module_entry(oop module) {
3659   ModuleEntry* module_entry = module_entry_raw(module);
3660   if (module_entry == nullptr) {
3661     // If the inject field containing the ModuleEntry* is null then return the
3662     // class loader's unnamed module.
3663     oop loader = java_lang_Module::loader(module);
3664     Handle h_loader = Handle(Thread::current(), loader);
3665     ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3666     return loader_cld->unnamed_module();
3667   }
3668   return module_entry;
3669 }
3670 
3671 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3672   assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3673   assert(module != nullptr, "module can't be null");
3674   assert(oopDesc::is_oop(module), "module must be oop");
3675   module->address_field_put(_module_entry_offset, (address)module_entry);
3676 }
3677 
3678 Handle reflect_ConstantPool::create(TRAPS) {
3679   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3680   InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3681   // Ensure it is initialized
3682   k->initialize(CHECK_NH);
3683   return k->allocate_instance_handle(THREAD);
3684 }
3685 
3686 
3687 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3688   oop mirror = value->pool_holder()->java_mirror();
3689   // Save the mirror to get back the constant pool.
3690   reflect->obj_field_put(_oop_offset, mirror);
3691 }
3692 
3693 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3694 
3695   oop mirror = reflect->obj_field(_oop_offset);
3696   Klass* k = java_lang_Class::as_Klass(mirror);
3697   assert(k->is_instance_klass(), "Must be");
3698 
3699   // Get the constant pool back from the klass.  Since class redefinition
3700   // merges the new constant pool into the old, this is essentially the
3701   // same constant pool as the original.  If constant pool merging is
3702   // no longer done in the future, this will have to change to save
3703   // the original.
3704   return InstanceKlass::cast(k)->constants();
3705 }
3706 
3707 
3708 // Support for java_lang_ref_Reference
3709 
3710 bool java_lang_ref_Reference::_offsets_initialized;
3711 
3712 int java_lang_ref_Reference::_referent_offset;
3713 int java_lang_ref_Reference::_queue_offset;
3714 int java_lang_ref_Reference::_next_offset;
3715 int java_lang_ref_Reference::_discovered_offset;
3716 
3717 #define REFERENCE_FIELDS_DO(macro) \
3718   macro(_referent_offset,   k, "referent", object_signature, false); \
3719   macro(_queue_offset,      k, "queue", referencequeue_signature, false); \
3720   macro(_next_offset,       k, "next", reference_signature, false); \
3721   macro(_discovered_offset, k, "discovered", reference_signature, false);
3722 
3723 void java_lang_ref_Reference::compute_offsets() {
3724   if (_offsets_initialized) {
3725     return;
3726   }
3727   _offsets_initialized = true;
3728   InstanceKlass* k = vmClasses::Reference_klass();
3729   REFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3730 }
3731 
3732 #if INCLUDE_CDS
3733 void java_lang_ref_Reference::serialize_offsets(SerializeClosure* f) {
3734   f->do_bool(&_offsets_initialized);
3735   REFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3736 }
3737 #endif
3738 
3739 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
3740   assert(obj != nullptr, "sanity");
3741   if (offset != _referent_offset) {
3742     return false;
3743   }
3744 
3745   Klass* k = obj->klass();
3746   if (!k->is_instance_klass()) {
3747     return false;
3748   }
3749 
3750   InstanceKlass* ik = InstanceKlass::cast(obj->klass());
3751   bool is_reference = ik->reference_type() != REF_NONE;
3752   assert(!is_reference || ik->is_subclass_of(vmClasses::Reference_klass()), "sanity");
3753   return is_reference;
3754 }
3755 
3756 int java_lang_boxing_object::_value_offset;
3757 int java_lang_boxing_object::_long_value_offset;
3758 
3759 #define BOXING_FIELDS_DO(macro) \
3760   macro(_value_offset,      integerKlass, "value", int_signature, false); \
3761   macro(_long_value_offset, longKlass, "value", long_signature, false);
3762 
3763 void java_lang_boxing_object::compute_offsets() {
3764   InstanceKlass* integerKlass = vmClasses::Integer_klass();
3765   InstanceKlass* longKlass = vmClasses::Long_klass();
3766   BOXING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3767 }
3768 
3769 #if INCLUDE_CDS
3770 void java_lang_boxing_object::serialize_offsets(SerializeClosure* f) {
3771   BOXING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3772 }
3773 #endif
3774 
3775 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
3776   Klass* k = vmClasses::box_klass(type);
3777   if (k == nullptr)  return nullptr;
3778   InstanceKlass* ik = InstanceKlass::cast(k);
3779   if (!ik->is_initialized()) {
3780     ik->initialize(CHECK_NULL);
3781   }
3782   return ik->allocate_instance(THREAD);
3783 }
3784 
3785 
3786 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
3787   oop box = initialize_and_allocate(type, CHECK_NULL);
3788   if (box == nullptr)  return nullptr;
3789   switch (type) {
3790     case T_BOOLEAN:
3791       box->bool_field_put(_value_offset, value->z);
3792       break;
3793     case T_CHAR:
3794       box->char_field_put(_value_offset, value->c);
3795       break;
3796     case T_FLOAT:
3797       box->float_field_put(_value_offset, value->f);
3798       break;
3799     case T_DOUBLE:
3800       box->double_field_put(_long_value_offset, value->d);
3801       break;
3802     case T_BYTE:
3803       box->byte_field_put(_value_offset, value->b);
3804       break;
3805     case T_SHORT:
3806       box->short_field_put(_value_offset, value->s);
3807       break;
3808     case T_INT:
3809       box->int_field_put(_value_offset, value->i);
3810       break;
3811     case T_LONG:
3812       box->long_field_put(_long_value_offset, value->j);
3813       break;
3814     default:
3815       return nullptr;
3816   }
3817   return box;
3818 }
3819 
3820 
3821 BasicType java_lang_boxing_object::basic_type(oop box) {
3822   if (box == nullptr)  return T_ILLEGAL;
3823   BasicType type = vmClasses::box_klass_type(box->klass());
3824   if (type == T_OBJECT)         // 'unknown' value returned by SD::bkt
3825     return T_ILLEGAL;
3826   return type;
3827 }
3828 
3829 
3830 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
3831   BasicType type = vmClasses::box_klass_type(box->klass());
3832   switch (type) {
3833   case T_BOOLEAN:
3834     value->z = box->bool_field(_value_offset);
3835     break;
3836   case T_CHAR:
3837     value->c = box->char_field(_value_offset);
3838     break;
3839   case T_FLOAT:
3840     value->f = box->float_field(_value_offset);
3841     break;
3842   case T_DOUBLE:
3843     value->d = box->double_field(_long_value_offset);
3844     break;
3845   case T_BYTE:
3846     value->b = box->byte_field(_value_offset);
3847     break;
3848   case T_SHORT:
3849     value->s = box->short_field(_value_offset);
3850     break;
3851   case T_INT:
3852     value->i = box->int_field(_value_offset);
3853     break;
3854   case T_LONG:
3855     value->j = box->long_field(_long_value_offset);
3856     break;
3857   default:
3858     return T_ILLEGAL;
3859   } // end switch
3860   return type;
3861 }
3862 
3863 
3864 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
3865   BasicType type = vmClasses::box_klass_type(box->klass());
3866   switch (type) {
3867   case T_BOOLEAN:
3868     box->bool_field_put(_value_offset, value->z);
3869     break;
3870   case T_CHAR:
3871     box->char_field_put(_value_offset, value->c);
3872     break;
3873   case T_FLOAT:
3874     box->float_field_put(_value_offset, value->f);
3875     break;
3876   case T_DOUBLE:
3877     box->double_field_put(_long_value_offset, value->d);
3878     break;
3879   case T_BYTE:
3880     box->byte_field_put(_value_offset, value->b);
3881     break;
3882   case T_SHORT:
3883     box->short_field_put(_value_offset, value->s);
3884     break;
3885   case T_INT:
3886     box->int_field_put(_value_offset, value->i);
3887     break;
3888   case T_LONG:
3889     box->long_field_put(_long_value_offset, value->j);
3890     break;
3891   default:
3892     return T_ILLEGAL;
3893   } // end switch
3894   return type;
3895 }
3896 
3897 
3898 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
3899   switch (type) {
3900   case T_BOOLEAN:   st->print("%s", value->z ? "true" : "false");   break;
3901   case T_CHAR:      st->print("%d", value->c);                      break;
3902   case T_BYTE:      st->print("%d", value->b);                      break;
3903   case T_SHORT:     st->print("%d", value->s);                      break;
3904   case T_INT:       st->print("%d", value->i);                      break;
3905   case T_LONG:      st->print(JLONG_FORMAT, value->j);              break;
3906   case T_FLOAT:     st->print("%f", value->f);                      break;
3907   case T_DOUBLE:    st->print("%lf", value->d);                     break;
3908   default:          st->print("type %d?", type);                    break;
3909   }
3910 }
3911 
3912 
3913 // Support for java_lang_ref_SoftReference
3914 //
3915 
3916 int java_lang_ref_SoftReference::_timestamp_offset;
3917 int java_lang_ref_SoftReference::_static_clock_offset;
3918 
3919 #define SOFTREFERENCE_FIELDS_DO(macro) \
3920   macro(_timestamp_offset,    k, "timestamp", long_signature, false); \
3921   macro(_static_clock_offset, k, "clock",     long_signature, true)
3922 
3923 void java_lang_ref_SoftReference::compute_offsets() {
3924   InstanceKlass* k = vmClasses::SoftReference_klass();
3925   SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3926 }
3927 
3928 #if INCLUDE_CDS
3929 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
3930   SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3931 }
3932 #endif
3933 
3934 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
3935   return ref->long_field(_timestamp_offset);
3936 }
3937 
3938 jlong java_lang_ref_SoftReference::clock() {
3939   InstanceKlass* ik = vmClasses::SoftReference_klass();
3940   oop base = ik->static_field_base_raw();
3941   return base->long_field(_static_clock_offset);
3942 }
3943 
3944 void java_lang_ref_SoftReference::set_clock(jlong value) {
3945   InstanceKlass* ik = vmClasses::SoftReference_klass();
3946   oop base = ik->static_field_base_raw();
3947   base->long_field_put(_static_clock_offset, value);
3948 }
3949 
3950 // Support for java_lang_invoke_DirectMethodHandle
3951 
3952 int java_lang_invoke_DirectMethodHandle::_member_offset;
3953 
3954 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
3955   oop member_name = nullptr;
3956   assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
3957          "a DirectMethodHandle oop is expected");
3958   return dmh->obj_field(_member_offset);
3959 }
3960 
3961 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
3962   macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
3963 
3964 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
3965   InstanceKlass* k = vmClasses::DirectMethodHandle_klass();
3966   DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3967 }
3968 
3969 #if INCLUDE_CDS
3970 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
3971   DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3972 }
3973 #endif
3974 
3975 // Support for java_lang_invoke_MethodHandle
3976 
3977 int java_lang_invoke_MethodHandle::_type_offset;
3978 int java_lang_invoke_MethodHandle::_form_offset;
3979 
3980 int java_lang_invoke_MemberName::_clazz_offset;
3981 int java_lang_invoke_MemberName::_name_offset;
3982 int java_lang_invoke_MemberName::_type_offset;
3983 int java_lang_invoke_MemberName::_flags_offset;
3984 int java_lang_invoke_MemberName::_method_offset;
3985 int java_lang_invoke_MemberName::_vmindex_offset;
3986 
3987 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
3988 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
3989 
3990 int java_lang_invoke_LambdaForm::_vmentry_offset;
3991 
3992 #define METHODHANDLE_FIELDS_DO(macro) \
3993   macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
3994   macro(_form_offset, k, "form",                 java_lang_invoke_LambdaForm_signature, false)
3995 
3996 void java_lang_invoke_MethodHandle::compute_offsets() {
3997   InstanceKlass* k = vmClasses::MethodHandle_klass();
3998   METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3999 }
4000 
4001 #if INCLUDE_CDS
4002 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
4003   METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4004 }
4005 #endif
4006 
4007 #define MEMBERNAME_FIELDS_DO(macro) \
4008   macro(_clazz_offset,   k, vmSymbols::clazz_name(),   class_signature,  false); \
4009   macro(_name_offset,    k, vmSymbols::name_name(),    string_signature, false); \
4010   macro(_type_offset,    k, vmSymbols::type_name(),    object_signature, false); \
4011   macro(_flags_offset,   k, vmSymbols::flags_name(),   int_signature,    false); \
4012   macro(_method_offset,  k, vmSymbols::method_name(),  java_lang_invoke_ResolvedMethodName_signature, false)
4013 
4014 void java_lang_invoke_MemberName::compute_offsets() {
4015   InstanceKlass* k = vmClasses::MemberName_klass();
4016   MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4017   MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4018 }
4019 
4020 #if INCLUDE_CDS
4021 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
4022   MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4023   MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4024 }
4025 #endif
4026 
4027 #define RESOLVEDMETHOD_FIELDS_DO(macro) \
4028   macro(_vmholder_offset, k, "vmholder", class_signature, false)
4029 
4030 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
4031   InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4032   assert(k != nullptr, "jdk mismatch");
4033   RESOLVEDMETHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4034   RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4035 }
4036 
4037 #if INCLUDE_CDS
4038 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
4039   RESOLVEDMETHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4040   RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4041 }
4042 #endif
4043 
4044 #define LAMBDAFORM_FIELDS_DO(macro) \
4045   macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
4046 
4047 void java_lang_invoke_LambdaForm::compute_offsets() {
4048   InstanceKlass* k = vmClasses::LambdaForm_klass();
4049   assert (k != nullptr, "jdk mismatch");
4050   LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4051 }
4052 
4053 #if INCLUDE_CDS
4054 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
4055   LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4056 }
4057 #endif
4058 
4059 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
4060   return obj != nullptr && is_subclass(obj->klass());
4061 }
4062 
4063 int jdk_internal_foreign_abi_NativeEntryPoint::_method_type_offset;
4064 int jdk_internal_foreign_abi_NativeEntryPoint::_downcall_stub_address_offset;
4065 
4066 #define NEP_FIELDS_DO(macro) \
4067   macro(_method_type_offset,           k, "methodType",          java_lang_invoke_MethodType_signature, false); \
4068   macro(_downcall_stub_address_offset, k, "downcallStubAddress", long_signature, false);
4069 
4070 bool jdk_internal_foreign_abi_NativeEntryPoint::is_instance(oop obj) {
4071   return obj != nullptr && is_subclass(obj->klass());
4072 }
4073 
4074 void jdk_internal_foreign_abi_NativeEntryPoint::compute_offsets() {
4075   InstanceKlass* k = vmClasses::NativeEntryPoint_klass();
4076   NEP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4077 }
4078 
4079 #if INCLUDE_CDS
4080 void jdk_internal_foreign_abi_NativeEntryPoint::serialize_offsets(SerializeClosure* f) {
4081   NEP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4082 }
4083 #endif
4084 
4085 oop jdk_internal_foreign_abi_NativeEntryPoint::method_type(oop entry) {
4086   return entry->obj_field(_method_type_offset);
4087 }
4088 
4089 jlong jdk_internal_foreign_abi_NativeEntryPoint::downcall_stub_address(oop entry) {
4090   return entry->long_field(_downcall_stub_address_offset);
4091 }
4092 
4093 int jdk_internal_foreign_abi_ABIDescriptor::_inputStorage_offset;
4094 int jdk_internal_foreign_abi_ABIDescriptor::_outputStorage_offset;
4095 int jdk_internal_foreign_abi_ABIDescriptor::_volatileStorage_offset;
4096 int jdk_internal_foreign_abi_ABIDescriptor::_stackAlignment_offset;
4097 int jdk_internal_foreign_abi_ABIDescriptor::_shadowSpace_offset;
4098 int jdk_internal_foreign_abi_ABIDescriptor::_scratch1_offset;
4099 int jdk_internal_foreign_abi_ABIDescriptor::_scratch2_offset;
4100 
4101 #define ABIDescriptor_FIELDS_DO(macro) \
4102   macro(_inputStorage_offset,    k, "inputStorage",    jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4103   macro(_outputStorage_offset,   k, "outputStorage",   jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4104   macro(_volatileStorage_offset, k, "volatileStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4105   macro(_stackAlignment_offset,  k, "stackAlignment",  int_signature, false); \
4106   macro(_shadowSpace_offset,     k, "shadowSpace",     int_signature, false); \
4107   macro(_scratch1_offset,        k, "scratch1",        jdk_internal_foreign_abi_VMStorage_signature, false); \
4108   macro(_scratch2_offset,        k, "scratch2",        jdk_internal_foreign_abi_VMStorage_signature, false);
4109 
4110 bool jdk_internal_foreign_abi_ABIDescriptor::is_instance(oop obj) {
4111   return obj != nullptr && is_subclass(obj->klass());
4112 }
4113 
4114 void jdk_internal_foreign_abi_ABIDescriptor::compute_offsets() {
4115   InstanceKlass* k = vmClasses::ABIDescriptor_klass();
4116   ABIDescriptor_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4117 }
4118 
4119 #if INCLUDE_CDS
4120 void jdk_internal_foreign_abi_ABIDescriptor::serialize_offsets(SerializeClosure* f) {
4121   ABIDescriptor_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4122 }
4123 #endif
4124 
4125 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::inputStorage(oop entry) {
4126   return oop_cast<objArrayOop>(entry->obj_field(_inputStorage_offset));
4127 }
4128 
4129 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::outputStorage(oop entry) {
4130   return oop_cast<objArrayOop>(entry->obj_field(_outputStorage_offset));
4131 }
4132 
4133 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::volatileStorage(oop entry) {
4134   return oop_cast<objArrayOop>(entry->obj_field(_volatileStorage_offset));
4135 }
4136 
4137 jint jdk_internal_foreign_abi_ABIDescriptor::stackAlignment(oop entry) {
4138   return entry->int_field(_stackAlignment_offset);
4139 }
4140 
4141 jint jdk_internal_foreign_abi_ABIDescriptor::shadowSpace(oop entry) {
4142   return entry->int_field(_shadowSpace_offset);
4143 }
4144 
4145 oop jdk_internal_foreign_abi_ABIDescriptor::scratch1(oop entry) {
4146   return entry->obj_field(_scratch1_offset);
4147 }
4148 
4149 oop jdk_internal_foreign_abi_ABIDescriptor::scratch2(oop entry) {
4150   return entry->obj_field(_scratch2_offset);
4151 }
4152 
4153 int jdk_internal_foreign_abi_VMStorage::_type_offset;
4154 int jdk_internal_foreign_abi_VMStorage::_indexOrOffset_offset;
4155 int jdk_internal_foreign_abi_VMStorage::_segmentMaskOrSize_offset;
4156 int jdk_internal_foreign_abi_VMStorage::_debugName_offset;
4157 
4158 #define VMStorage_FIELDS_DO(macro) \
4159   macro(_type_offset,              k, "type",              byte_signature, false); \
4160   macro(_indexOrOffset_offset,     k, "indexOrOffset",     int_signature, false); \
4161   macro(_segmentMaskOrSize_offset, k, "segmentMaskOrSize", short_signature, false); \
4162   macro(_debugName_offset,         k, "debugName",         string_signature, false); \
4163 
4164 bool jdk_internal_foreign_abi_VMStorage::is_instance(oop obj) {
4165   return obj != nullptr && is_subclass(obj->klass());
4166 }
4167 
4168 void jdk_internal_foreign_abi_VMStorage::compute_offsets() {
4169   InstanceKlass* k = vmClasses::VMStorage_klass();
4170   VMStorage_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4171 }
4172 
4173 #if INCLUDE_CDS
4174 void jdk_internal_foreign_abi_VMStorage::serialize_offsets(SerializeClosure* f) {
4175   VMStorage_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4176 }
4177 #endif
4178 
4179 jbyte jdk_internal_foreign_abi_VMStorage::type(oop entry) {
4180   return entry->byte_field(_type_offset);
4181 }
4182 
4183 jint jdk_internal_foreign_abi_VMStorage::index_or_offset(oop entry) {
4184   return entry->int_field(_indexOrOffset_offset);
4185 }
4186 
4187 jshort jdk_internal_foreign_abi_VMStorage::segment_mask_or_size(oop entry) {
4188   return entry->short_field(_segmentMaskOrSize_offset);
4189 }
4190 
4191 oop jdk_internal_foreign_abi_VMStorage::debugName(oop entry) {
4192   return entry->obj_field(_debugName_offset);
4193 }
4194 
4195 int jdk_internal_foreign_abi_CallConv::_argRegs_offset;
4196 int jdk_internal_foreign_abi_CallConv::_retRegs_offset;
4197 
4198 #define CallConv_FIELDS_DO(macro) \
4199   macro(_argRegs_offset, k, "argRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4200   macro(_retRegs_offset, k, "retRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4201 
4202 bool jdk_internal_foreign_abi_CallConv::is_instance(oop obj) {
4203   return obj != nullptr && is_subclass(obj->klass());
4204 }
4205 
4206 void jdk_internal_foreign_abi_CallConv::compute_offsets() {
4207   InstanceKlass* k = vmClasses::CallConv_klass();
4208   CallConv_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4209 }
4210 
4211 #if INCLUDE_CDS
4212 void jdk_internal_foreign_abi_CallConv::serialize_offsets(SerializeClosure* f) {
4213   CallConv_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4214 }
4215 #endif
4216 
4217 objArrayOop jdk_internal_foreign_abi_CallConv::argRegs(oop entry) {
4218   return oop_cast<objArrayOop>(entry->obj_field(_argRegs_offset));
4219 }
4220 
4221 objArrayOop jdk_internal_foreign_abi_CallConv::retRegs(oop entry) {
4222   return oop_cast<objArrayOop>(entry->obj_field(_retRegs_offset));
4223 }
4224 
4225 oop java_lang_invoke_MethodHandle::type(oop mh) {
4226   return mh->obj_field(_type_offset);
4227 }
4228 
4229 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
4230   mh->obj_field_put(_type_offset, mtype);
4231 }
4232 
4233 oop java_lang_invoke_MethodHandle::form(oop mh) {
4234   assert(_form_offset != 0, "");
4235   return mh->obj_field(_form_offset);
4236 }
4237 
4238 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
4239   assert(_form_offset != 0, "");
4240   mh->obj_field_put(_form_offset, lform);
4241 }
4242 
4243 /// MemberName accessors
4244 
4245 oop java_lang_invoke_MemberName::clazz(oop mname) {
4246   assert(is_instance(mname), "wrong type");
4247   return mname->obj_field(_clazz_offset);
4248 }
4249 
4250 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
4251   assert(is_instance(mname), "wrong type");
4252   mname->obj_field_put(_clazz_offset, clazz);
4253 }
4254 
4255 oop java_lang_invoke_MemberName::name(oop mname) {
4256   assert(is_instance(mname), "wrong type");
4257   return mname->obj_field(_name_offset);
4258 }
4259 
4260 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
4261   assert(is_instance(mname), "wrong type");
4262   mname->obj_field_put(_name_offset, name);
4263 }
4264 
4265 oop java_lang_invoke_MemberName::type(oop mname) {
4266   assert(is_instance(mname), "wrong type");
4267   return mname->obj_field(_type_offset);
4268 }
4269 
4270 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
4271   assert(is_instance(mname), "wrong type");
4272   mname->obj_field_put(_type_offset, type);
4273 }
4274 
4275 int java_lang_invoke_MemberName::flags(oop mname) {
4276   assert(is_instance(mname), "wrong type");
4277   return mname->int_field(_flags_offset);
4278 }
4279 
4280 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
4281   assert(is_instance(mname), "wrong type");
4282   mname->int_field_put(_flags_offset, flags);
4283 }
4284 
4285 
4286 // Return vmtarget from ResolvedMethodName method field through indirection
4287 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
4288   assert(is_instance(mname), "wrong type");
4289   oop method = mname->obj_field(_method_offset);
4290   return method == nullptr ? nullptr : java_lang_invoke_ResolvedMethodName::vmtarget(method);
4291 }
4292 
4293 bool java_lang_invoke_MemberName::is_method(oop mname) {
4294   assert(is_instance(mname), "must be MemberName");
4295   return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
4296 }
4297 
4298 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
4299   assert(is_instance(mname), "wrong type");
4300   mname->obj_field_put(_method_offset, resolved_method);
4301 }
4302 
4303 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
4304   assert(is_instance(mname), "wrong type");
4305   return (intptr_t) mname->address_field(_vmindex_offset);
4306 }
4307 
4308 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
4309   assert(is_instance(mname), "wrong type");
4310   mname->address_field_put(_vmindex_offset, (address) index);
4311 }
4312 
4313 
4314 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
4315   assert(is_instance(resolved_method), "wrong type");
4316   Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
4317   assert(m->is_method(), "must be");
4318   return m;
4319 }
4320 
4321 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
4322 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
4323   assert(is_instance(resolved_method), "wrong type");
4324   resolved_method->address_field_put(_vmtarget_offset, (address)m);
4325 }
4326 
4327 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) {
4328   assert(is_instance(resolved_method), "wrong type");
4329   resolved_method->obj_field_put(_vmholder_offset, holder);
4330 }
4331 
4332 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
4333   const Method* method = m();
4334 
4335   // lookup ResolvedMethod oop in the table, or create a new one and intern it
4336   oop resolved_method = ResolvedMethodTable::find_method(method);
4337   if (resolved_method != nullptr) {
4338     return resolved_method;
4339   }
4340 
4341   InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4342   if (!k->is_initialized()) {
4343     k->initialize(CHECK_NULL);
4344   }
4345 
4346   oop new_resolved_method = k->allocate_instance(CHECK_NULL);
4347 
4348   NoSafepointVerifier nsv;
4349 
4350   if (method->is_old()) {
4351     method = (method->is_deleted()) ? Universe::throw_no_such_method_error() :
4352                                       method->get_new_method();
4353   }
4354 
4355   InstanceKlass* holder = method->method_holder();
4356 
4357   set_vmtarget(new_resolved_method, const_cast<Method*>(method));
4358   // Add a reference to the loader (actually mirror because hidden classes may not have
4359   // distinct loaders) to ensure the metadata is kept alive.
4360   // This mirror may be different than the one in clazz field.
4361   set_vmholder(new_resolved_method, holder->java_mirror());
4362 
4363   // Set flag in class to indicate this InstanceKlass has entries in the table
4364   // to avoid walking table during redefinition if none of the redefined classes
4365   // have any membernames in the table.
4366   holder->set_has_resolved_methods();
4367 
4368   return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method));
4369 }
4370 
4371 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
4372   assert(is_instance(lform), "wrong type");
4373   return lform->obj_field(_vmentry_offset);
4374 }
4375 
4376 
4377 // Support for java_lang_invoke_MethodType
4378 
4379 int java_lang_invoke_MethodType::_rtype_offset;
4380 int java_lang_invoke_MethodType::_ptypes_offset;
4381 
4382 #define METHODTYPE_FIELDS_DO(macro) \
4383   macro(_rtype_offset,  k, "rtype",  class_signature,       false); \
4384   macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
4385 
4386 void java_lang_invoke_MethodType::compute_offsets() {
4387   InstanceKlass* k = vmClasses::MethodType_klass();
4388   METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4389 }
4390 
4391 #if INCLUDE_CDS
4392 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
4393   METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4394 }
4395 #endif
4396 
4397 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
4398   st->print("(");
4399   objArrayOop pts = ptypes(mt);
4400   if (pts != nullptr) {
4401     for (int i = 0, limit = pts->length(); i < limit; i++) {
4402       java_lang_Class::print_signature(pts->obj_at(i), st);
4403     }
4404   } else {
4405     st->print("null");
4406   }
4407   st->print(")");
4408   oop rt = rtype(mt);
4409   if (rt != nullptr) {
4410     java_lang_Class::print_signature(rt, st);
4411   } else {
4412     st->print("null");
4413   }
4414 }
4415 
4416 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) {
4417   ResourceMark rm;
4418   stringStream buffer(128);
4419   print_signature(mt, &buffer);
4420   const char* sigstr =       buffer.base();
4421   int         siglen = (int) buffer.size();
4422   Symbol *name;
4423   if (!intern_if_not_found) {
4424     name = SymbolTable::probe(sigstr, siglen);
4425   } else {
4426     name = SymbolTable::new_symbol(sigstr, siglen);
4427   }
4428   return name;
4429 }
4430 
4431 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
4432   if (mt1 == mt2)
4433     return true;
4434   if (rtype(mt1) != rtype(mt2))
4435     return false;
4436   if (ptype_count(mt1) != ptype_count(mt2))
4437     return false;
4438   for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
4439     if (ptype(mt1, i) != ptype(mt2, i))
4440       return false;
4441   }
4442   return true;
4443 }
4444 
4445 oop java_lang_invoke_MethodType::rtype(oop mt) {
4446   assert(is_instance(mt), "must be a MethodType");
4447   return mt->obj_field(_rtype_offset);
4448 }
4449 
4450 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
4451   assert(is_instance(mt), "must be a MethodType");
4452   return (objArrayOop) mt->obj_field(_ptypes_offset);
4453 }
4454 
4455 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
4456   return ptypes(mt)->obj_at(idx);
4457 }
4458 
4459 int java_lang_invoke_MethodType::ptype_count(oop mt) {
4460   return ptypes(mt)->length();
4461 }
4462 
4463 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
4464   objArrayOop pts = ptypes(mt);
4465   int count = pts->length();
4466   int slots = 0;
4467   for (int i = 0; i < count; i++) {
4468     BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
4469     slots += type2size[bt];
4470   }
4471   return slots;
4472 }
4473 
4474 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
4475   BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
4476   return type2size[bt];
4477 }
4478 
4479 
4480 // Support for java_lang_invoke_CallSite
4481 
4482 int java_lang_invoke_CallSite::_target_offset;
4483 int java_lang_invoke_CallSite::_context_offset;
4484 
4485 #define CALLSITE_FIELDS_DO(macro) \
4486   macro(_target_offset,  k, "target", java_lang_invoke_MethodHandle_signature, false); \
4487   macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false)
4488 
4489 void java_lang_invoke_CallSite::compute_offsets() {
4490   InstanceKlass* k = vmClasses::CallSite_klass();
4491   CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4492 }
4493 
4494 #if INCLUDE_CDS
4495 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
4496   CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4497 }
4498 #endif
4499 
4500 oop java_lang_invoke_CallSite::context_no_keepalive(oop call_site) {
4501   assert(java_lang_invoke_CallSite::is_instance(call_site), "");
4502 
4503   oop dep_oop = call_site->obj_field_access<AS_NO_KEEPALIVE>(_context_offset);
4504   return dep_oop;
4505 }
4506 
4507 // Support for java_lang_invoke_ConstantCallSite
4508 
4509 int java_lang_invoke_ConstantCallSite::_is_frozen_offset;
4510 
4511 #define CONSTANTCALLSITE_FIELDS_DO(macro) \
4512   macro(_is_frozen_offset, k, "isFrozen", bool_signature, false)
4513 
4514 void java_lang_invoke_ConstantCallSite::compute_offsets() {
4515   InstanceKlass* k = vmClasses::ConstantCallSite_klass();
4516   CONSTANTCALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4517 }
4518 
4519 #if INCLUDE_CDS
4520 void java_lang_invoke_ConstantCallSite::serialize_offsets(SerializeClosure* f) {
4521   CONSTANTCALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4522 }
4523 #endif
4524 
4525 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext
4526 
4527 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset;
4528 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_last_cleanup_offset;
4529 
4530 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() {
4531   InstanceKlass* k = vmClasses::Context_klass();
4532   CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4533 }
4534 
4535 #if INCLUDE_CDS
4536 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) {
4537   CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4538 }
4539 #endif
4540 
4541 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) {
4542   assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
4543   nmethodBucket* volatile* vmdeps_addr = call_site->field_addr<nmethodBucket* volatile>(_vmdependencies_offset);
4544   volatile uint64_t* last_cleanup_addr = call_site->field_addr<volatile uint64_t>(_last_cleanup_offset);
4545   DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr);
4546   return dep_ctx;
4547 }
4548 
4549 // Support for java_security_AccessControlContext
4550 
4551 int java_security_AccessControlContext::_context_offset;
4552 int java_security_AccessControlContext::_privilegedContext_offset;
4553 int java_security_AccessControlContext::_isPrivileged_offset;
4554 int java_security_AccessControlContext::_isAuthorized_offset;
4555 
4556 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \
4557   macro(_context_offset,           k, "context",      protectiondomain_signature, false); \
4558   macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \
4559   macro(_isPrivileged_offset,      k, "isPrivileged", bool_signature, false); \
4560   macro(_isAuthorized_offset,      k, "isAuthorized", bool_signature, false)
4561 
4562 void java_security_AccessControlContext::compute_offsets() {
4563   assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
4564   InstanceKlass* k = vmClasses::AccessControlContext_klass();
4565   ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4566 }
4567 
4568 #if INCLUDE_CDS
4569 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) {
4570   ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4571 }
4572 #endif
4573 
4574 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
4575   assert(_isPrivileged_offset != 0, "offsets should have been initialized");
4576   assert(_isAuthorized_offset != 0, "offsets should have been initialized");
4577   // Ensure klass is initialized
4578   vmClasses::AccessControlContext_klass()->initialize(CHECK_NULL);
4579   // Allocate result
4580   oop result = vmClasses::AccessControlContext_klass()->allocate_instance(CHECK_NULL);
4581   // Fill in values
4582   result->obj_field_put(_context_offset, context());
4583   result->obj_field_put(_privilegedContext_offset, privileged_context());
4584   result->bool_field_put(_isPrivileged_offset, isPrivileged);
4585   result->bool_field_put(_isAuthorized_offset, true);
4586   return result;
4587 }
4588 
4589 
4590 // Support for java_lang_ClassLoader
4591 
4592 int  java_lang_ClassLoader::_loader_data_offset;
4593 int  java_lang_ClassLoader::_parallelCapable_offset;
4594 int  java_lang_ClassLoader::_name_offset;
4595 int  java_lang_ClassLoader::_nameAndId_offset;
4596 int  java_lang_ClassLoader::_unnamedModule_offset;
4597 int  java_lang_ClassLoader::_parent_offset;
4598 
4599 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
4600   assert(loader != nullptr, "loader must not be null");
4601   assert(oopDesc::is_oop(loader), "loader must be oop");
4602   return Atomic::load_acquire(loader->field_addr<ClassLoaderData*>(_loader_data_offset));
4603 }
4604 
4605 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
4606   assert(loader != nullptr, "loader must not be null");
4607   assert(oopDesc::is_oop(loader), "loader must be oop");
4608   return *loader->field_addr<ClassLoaderData*>(_loader_data_offset);
4609 }
4610 
4611 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
4612   assert(loader != nullptr, "loader must not be null");
4613   assert(oopDesc::is_oop(loader), "loader must be oop");
4614   Atomic::release_store(loader->field_addr<ClassLoaderData*>(_loader_data_offset), new_data);
4615 }
4616 
4617 #define CLASSLOADER_FIELDS_DO(macro) \
4618   macro(_parallelCapable_offset, k1, "parallelLockMap",      concurrenthashmap_signature, false); \
4619   macro(_name_offset,            k1, vmSymbols::name_name(), string_signature, false); \
4620   macro(_nameAndId_offset,       k1, "nameAndId",            string_signature, false); \
4621   macro(_unnamedModule_offset,   k1, "unnamedModule",        module_signature, false); \
4622   macro(_parent_offset,          k1, "parent",               classloader_signature, false)
4623 
4624 void java_lang_ClassLoader::compute_offsets() {
4625   InstanceKlass* k1 = vmClasses::ClassLoader_klass();
4626   CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4627 
4628   CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4629 }
4630 
4631 #if INCLUDE_CDS
4632 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
4633   CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4634   CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4635 }
4636 #endif
4637 
4638 oop java_lang_ClassLoader::parent(oop loader) {
4639   assert(is_instance(loader), "loader must be oop");
4640   return loader->obj_field(_parent_offset);
4641 }
4642 
4643 oop java_lang_ClassLoader::parent_no_keepalive(oop loader) {
4644   assert(is_instance(loader), "loader must be oop");
4645   return loader->obj_field_access<AS_NO_KEEPALIVE>(_parent_offset);
4646 }
4647 
4648 // Returns the name field of this class loader.  If the name field has not
4649 // been set, null will be returned.
4650 oop java_lang_ClassLoader::name(oop loader) {
4651   assert(is_instance(loader), "loader must be oop");
4652   return loader->obj_field(_name_offset);
4653 }
4654 
4655 // Returns the nameAndId field of this class loader. The format is
4656 // as follows:
4657 //   If the defining loader has a name explicitly set then '<loader-name>' @<id>
4658 //   If the defining loader has no name then <qualified-class-name> @<id>
4659 //   If built-in loader, then omit '@<id>' as there is only one instance.
4660 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
4661 oop java_lang_ClassLoader::nameAndId(oop loader) {
4662   assert(is_instance(loader), "loader must be oop");
4663   return loader->obj_field(_nameAndId_offset);
4664 }
4665 
4666 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
4667   assert(is_instance(loader), "loader must be oop");
4668   assert(cl == nullptr || is_instance(cl), "cl argument must be oop");
4669   oop acl = loader;
4670   debug_only(jint loop_count = 0);
4671   // This loop taken verbatim from ClassLoader.java:
4672   do {
4673     acl = parent(acl);
4674     if (cl == acl) {
4675       return true;
4676     }
4677     assert(++loop_count > 0, "loop_count overflow");
4678   } while (acl != nullptr);
4679   return false;
4680 }
4681 
4682 bool java_lang_ClassLoader::is_instance(oop obj) {
4683   return obj != nullptr && is_subclass(obj->klass());
4684 }
4685 
4686 
4687 // For class loader classes, parallelCapable defined
4688 // based on non-null field
4689 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
4690 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
4691   assert(_parallelCapable_offset != 0, "offsets should have been initialized");
4692   return (class_loader->obj_field(_parallelCapable_offset) != nullptr);
4693 }
4694 
4695 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
4696   // Fix for 4474172; see evaluation for more details
4697   loader = non_reflection_class_loader(loader);
4698 
4699   oop cl = SystemDictionary::java_system_loader();
4700   while(cl != nullptr) {
4701     if (cl == loader) return true;
4702     cl = parent(cl);
4703   }
4704   return false;
4705 }
4706 
4707 // Return true if this is one of the class loaders associated with
4708 // the generated bytecodes for serialization constructor returned
4709 // by sun.reflect.ReflectionFactory::newConstructorForSerialization
4710 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) {
4711   if (loader != nullptr) {
4712     Klass* delegating_cl_class = vmClasses::reflect_DelegatingClassLoader_klass();
4713     // This might be null in non-1.4 JDKs
4714     return (delegating_cl_class != nullptr && loader->is_a(delegating_cl_class));
4715   }
4716   return false;
4717 }
4718 
4719 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
4720   // See whether this is one of the class loaders associated with
4721   // the generated bytecodes for reflection, and if so, "magically"
4722   // delegate to its parent to prevent class loading from occurring
4723   // in places where applications using reflection didn't expect it.
4724   if (is_reflection_class_loader(loader)) {
4725     return parent(loader);
4726   }
4727   return loader;
4728 }
4729 
4730 oop java_lang_ClassLoader::unnamedModule(oop loader) {
4731   assert(is_instance(loader), "loader must be oop");
4732   return loader->obj_field(_unnamedModule_offset);
4733 }
4734 
4735 // Support for java_lang_System
4736 //
4737 
4738 int java_lang_System::_static_in_offset;
4739 int java_lang_System::_static_out_offset;
4740 int java_lang_System::_static_err_offset;
4741 int java_lang_System::_static_security_offset;
4742 int java_lang_System::_static_allow_security_offset;
4743 int java_lang_System::_static_never_offset;
4744 
4745 #define SYSTEM_FIELDS_DO(macro) \
4746   macro(_static_in_offset,  k, "in",  input_stream_signature, true); \
4747   macro(_static_out_offset, k, "out", print_stream_signature, true); \
4748   macro(_static_err_offset, k, "err", print_stream_signature, true); \
4749   macro(_static_security_offset, k, "security", security_manager_signature, true); \
4750   macro(_static_allow_security_offset, k, "allowSecurityManager", int_signature, true); \
4751   macro(_static_never_offset, k, "NEVER", int_signature, true)
4752 
4753 void java_lang_System::compute_offsets() {
4754   InstanceKlass* k = vmClasses::System_klass();
4755   SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4756 }
4757 
4758 // This field tells us that a security manager can never be installed so we
4759 // can completely skip populating the ProtectionDomainCacheTable.
4760 bool java_lang_System::allow_security_manager() {
4761   static int initialized = false;
4762   static bool allowed = true; // default
4763   if (!initialized) {
4764     oop base = vmClasses::System_klass()->static_field_base_raw();
4765     int never = base->int_field(_static_never_offset);
4766     allowed = (base->int_field(_static_allow_security_offset) != never);
4767     initialized = true;
4768   }
4769   return allowed;
4770 }
4771 
4772 // This field tells us that a security manager is installed.
4773 bool java_lang_System::has_security_manager() {
4774   oop base = vmClasses::System_klass()->static_field_base_raw();
4775   return base->obj_field(_static_security_offset) != nullptr;
4776 }
4777 
4778 #if INCLUDE_CDS
4779 void java_lang_System::serialize_offsets(SerializeClosure* f) {
4780    SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4781 }
4782 #endif
4783 
4784 // Support for jdk_internal_misc_UnsafeConstants
4785 //
4786 class UnsafeConstantsFixup : public FieldClosure {
4787 private:
4788   int _address_size;
4789   int _page_size;
4790   bool _big_endian;
4791   bool _use_unaligned_access;
4792   int _data_cache_line_flush_size;
4793 public:
4794   UnsafeConstantsFixup() {
4795     // round up values for all static final fields
4796     _address_size = sizeof(void*);
4797     _page_size = AIX_ONLY(sysconf(_SC_PAGESIZE)) NOT_AIX((int)os::vm_page_size());
4798     _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true);
4799     _use_unaligned_access = UseUnalignedAccesses;
4800     _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size();
4801   }
4802 
4803   void do_field(fieldDescriptor* fd) {
4804     oop mirror = fd->field_holder()->java_mirror();
4805     assert(mirror != nullptr, "UnsafeConstants must have mirror already");
4806     assert(fd->field_holder() == vmClasses::UnsafeConstants_klass(), "Should be UnsafeConstants");
4807     assert(fd->is_final(), "fields of UnsafeConstants must be final");
4808     assert(fd->is_static(), "fields of UnsafeConstants must be static");
4809     if (fd->name() == vmSymbols::address_size_name()) {
4810       mirror->int_field_put(fd->offset(), _address_size);
4811     } else if (fd->name() == vmSymbols::page_size_name()) {
4812       mirror->int_field_put(fd->offset(), _page_size);
4813     } else if (fd->name() == vmSymbols::big_endian_name()) {
4814       mirror->bool_field_put(fd->offset(), _big_endian);
4815     } else if (fd->name() == vmSymbols::use_unaligned_access_name()) {
4816       mirror->bool_field_put(fd->offset(), _use_unaligned_access);
4817     } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) {
4818       mirror->int_field_put(fd->offset(), _data_cache_line_flush_size);
4819     } else {
4820       assert(false, "unexpected UnsafeConstants field");
4821     }
4822   }
4823 };
4824 
4825 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() {
4826   UnsafeConstantsFixup fixup;
4827   vmClasses::UnsafeConstants_klass()->do_local_static_fields(&fixup);
4828 }
4829 
4830 
4831 // java_lang_StackTraceElement
4832 
4833 int java_lang_StackTraceElement::_methodName_offset;
4834 int java_lang_StackTraceElement::_fileName_offset;
4835 int java_lang_StackTraceElement::_lineNumber_offset;
4836 int java_lang_StackTraceElement::_moduleName_offset;
4837 int java_lang_StackTraceElement::_moduleVersion_offset;
4838 int java_lang_StackTraceElement::_classLoaderName_offset;
4839 int java_lang_StackTraceElement::_declaringClass_offset;
4840 int java_lang_StackTraceElement::_declaringClassObject_offset;
4841 
4842 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4843   macro(_declaringClassObject_offset,  k, "declaringClassObject", class_signature, false); \
4844   macro(_classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4845   macro(_moduleName_offset,      k, "moduleName",      string_signature, false); \
4846   macro(_moduleVersion_offset,   k, "moduleVersion",   string_signature, false); \
4847   macro(_declaringClass_offset,  k, "declaringClass",  string_signature, false); \
4848   macro(_methodName_offset,      k, "methodName",      string_signature, false); \
4849   macro(_fileName_offset,        k, "fileName",        string_signature, false); \
4850   macro(_lineNumber_offset,      k, "lineNumber",      int_signature,    false)
4851 
4852 // Support for java_lang_StackTraceElement
4853 void java_lang_StackTraceElement::compute_offsets() {
4854   InstanceKlass* k = vmClasses::StackTraceElement_klass();
4855   STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4856 }
4857 
4858 #if INCLUDE_CDS
4859 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
4860   STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4861 }
4862 #endif
4863 
4864 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
4865   element->obj_field_put(_fileName_offset, value);
4866 }
4867 
4868 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
4869   element->obj_field_put(_declaringClass_offset, value);
4870 }
4871 
4872 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
4873   element->obj_field_put(_methodName_offset, value);
4874 }
4875 
4876 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
4877   element->int_field_put(_lineNumber_offset, value);
4878 }
4879 
4880 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
4881   element->obj_field_put(_moduleName_offset, value);
4882 }
4883 
4884 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
4885   element->obj_field_put(_moduleVersion_offset, value);
4886 }
4887 
4888 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
4889   element->obj_field_put(_classLoaderName_offset, value);
4890 }
4891 
4892 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
4893   element->obj_field_put(_declaringClassObject_offset, value);
4894 }
4895 
4896 
4897 // java_lang_AssertionStatusDirectives
4898 
4899 int java_lang_AssertionStatusDirectives::_classes_offset;
4900 int java_lang_AssertionStatusDirectives::_classEnabled_offset;
4901 int java_lang_AssertionStatusDirectives::_packages_offset;
4902 int java_lang_AssertionStatusDirectives::_packageEnabled_offset;
4903 int java_lang_AssertionStatusDirectives::_deflt_offset;
4904 
4905 // Support for java Assertions - java_lang_AssertionStatusDirectives.
4906 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
4907   macro(_classes_offset,        k, "classes",        string_array_signature, false); \
4908   macro(_classEnabled_offset,   k, "classEnabled",   bool_array_signature, false); \
4909   macro(_packages_offset,       k, "packages",       string_array_signature, false); \
4910   macro(_packageEnabled_offset, k, "packageEnabled", bool_array_signature,   false); \
4911   macro(_deflt_offset,          k, "deflt",          bool_signature,         false)
4912 
4913 void java_lang_AssertionStatusDirectives::compute_offsets() {
4914   InstanceKlass* k = vmClasses::AssertionStatusDirectives_klass();
4915   ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4916 }
4917 
4918 #if INCLUDE_CDS
4919 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
4920   ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4921 }
4922 #endif
4923 
4924 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
4925   o->obj_field_put(_classes_offset, val);
4926 }
4927 
4928 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
4929   o->obj_field_put(_classEnabled_offset, val);
4930 }
4931 
4932 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
4933   o->obj_field_put(_packages_offset, val);
4934 }
4935 
4936 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
4937   o->obj_field_put(_packageEnabled_offset, val);
4938 }
4939 
4940 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
4941   o->bool_field_put(_deflt_offset, val);
4942 }
4943 
4944 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
4945 
4946 #define AOS_FIELDS_DO(macro) \
4947   macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
4948 
4949 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
4950   InstanceKlass* k = vmClasses::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
4951   AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4952 }
4953 
4954 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
4955   assert(_owner_offset != 0, "Must be initialized");
4956   return obj->obj_field(_owner_offset);
4957 }
4958 
4959 #if INCLUDE_CDS
4960 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
4961   AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4962 }
4963 #endif
4964 
4965 int vector_VectorPayload::_payload_offset;
4966 
4967 #define VECTORPAYLOAD_FIELDS_DO(macro) \
4968   macro(_payload_offset, k, "payload", object_signature, false)
4969 
4970 void vector_VectorPayload::compute_offsets() {
4971   InstanceKlass* k = vmClasses::vector_VectorPayload_klass();
4972   VECTORPAYLOAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4973 }
4974 
4975 #if INCLUDE_CDS
4976 void vector_VectorPayload::serialize_offsets(SerializeClosure* f) {
4977   VECTORPAYLOAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4978 }
4979 #endif
4980 
4981 void vector_VectorPayload::set_payload(oop o, oop val) {
4982   o->obj_field_put(_payload_offset, val);
4983 }
4984 
4985 bool vector_VectorPayload::is_instance(oop obj) {
4986   return obj != nullptr && is_subclass(obj->klass());
4987 }
4988 
4989 int java_lang_Integer_IntegerCache::_static_cache_offset;
4990 int java_lang_Long_LongCache::_static_cache_offset;
4991 int java_lang_Character_CharacterCache::_static_cache_offset;
4992 int java_lang_Short_ShortCache::_static_cache_offset;
4993 int java_lang_Byte_ByteCache::_static_cache_offset;
4994 
4995 #define INTEGER_CACHE_FIELDS_DO(macro) \
4996   macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true)
4997 
4998 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) {
4999   guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5000   INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5001 }
5002 
5003 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) {
5004   oop base = ik->static_field_base_raw();
5005   return objArrayOop(base->obj_field(_static_cache_offset));
5006 }
5007 
5008 Symbol* java_lang_Integer_IntegerCache::symbol() {
5009   return vmSymbols::java_lang_Integer_IntegerCache();
5010 }
5011 
5012 #if INCLUDE_CDS
5013 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) {
5014   INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5015 }
5016 #endif
5017 #undef INTEGER_CACHE_FIELDS_DO
5018 
5019 jint java_lang_Integer::value(oop obj) {
5020    jvalue v;
5021    java_lang_boxing_object::get_value(obj, &v);
5022    return v.i;
5023 }
5024 
5025 #define LONG_CACHE_FIELDS_DO(macro) \
5026   macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true)
5027 
5028 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) {
5029   guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5030   LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5031 }
5032 
5033 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) {
5034   oop base = ik->static_field_base_raw();
5035   return objArrayOop(base->obj_field(_static_cache_offset));
5036 }
5037 
5038 Symbol* java_lang_Long_LongCache::symbol() {
5039   return vmSymbols::java_lang_Long_LongCache();
5040 }
5041 
5042 #if INCLUDE_CDS
5043 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) {
5044   LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5045 }
5046 #endif
5047 #undef LONG_CACHE_FIELDS_DO
5048 
5049 jlong java_lang_Long::value(oop obj) {
5050    jvalue v;
5051    java_lang_boxing_object::get_value(obj, &v);
5052    return v.j;
5053 }
5054 
5055 #define CHARACTER_CACHE_FIELDS_DO(macro) \
5056   macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true)
5057 
5058 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) {
5059   guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5060   CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5061 }
5062 
5063 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) {
5064   oop base = ik->static_field_base_raw();
5065   return objArrayOop(base->obj_field(_static_cache_offset));
5066 }
5067 
5068 Symbol* java_lang_Character_CharacterCache::symbol() {
5069   return vmSymbols::java_lang_Character_CharacterCache();
5070 }
5071 
5072 #if INCLUDE_CDS
5073 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) {
5074   CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5075 }
5076 #endif
5077 #undef CHARACTER_CACHE_FIELDS_DO
5078 
5079 jchar java_lang_Character::value(oop obj) {
5080    jvalue v;
5081    java_lang_boxing_object::get_value(obj, &v);
5082    return v.c;
5083 }
5084 
5085 #define SHORT_CACHE_FIELDS_DO(macro) \
5086   macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true)
5087 
5088 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) {
5089   guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5090   SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5091 }
5092 
5093 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) {
5094   oop base = ik->static_field_base_raw();
5095   return objArrayOop(base->obj_field(_static_cache_offset));
5096 }
5097 
5098 Symbol* java_lang_Short_ShortCache::symbol() {
5099   return vmSymbols::java_lang_Short_ShortCache();
5100 }
5101 
5102 #if INCLUDE_CDS
5103 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) {
5104   SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5105 }
5106 #endif
5107 #undef SHORT_CACHE_FIELDS_DO
5108 
5109 jshort java_lang_Short::value(oop obj) {
5110    jvalue v;
5111    java_lang_boxing_object::get_value(obj, &v);
5112    return v.s;
5113 }
5114 
5115 #define BYTE_CACHE_FIELDS_DO(macro) \
5116   macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true)
5117 
5118 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) {
5119   guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5120   BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5121 }
5122 
5123 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) {
5124   oop base = ik->static_field_base_raw();
5125   return objArrayOop(base->obj_field(_static_cache_offset));
5126 }
5127 
5128 Symbol* java_lang_Byte_ByteCache::symbol() {
5129   return vmSymbols::java_lang_Byte_ByteCache();
5130 }
5131 
5132 #if INCLUDE_CDS
5133 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) {
5134   BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5135 }
5136 #endif
5137 #undef BYTE_CACHE_FIELDS_DO
5138 
5139 jbyte java_lang_Byte::value(oop obj) {
5140    jvalue v;
5141    java_lang_boxing_object::get_value(obj, &v);
5142    return v.b;
5143 }
5144 
5145 int java_lang_Boolean::_static_TRUE_offset;
5146 int java_lang_Boolean::_static_FALSE_offset;
5147 
5148 #define BOOLEAN_FIELDS_DO(macro) \
5149   macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \
5150   macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true)
5151 
5152 
5153 void java_lang_Boolean::compute_offsets(InstanceKlass *k) {
5154   guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5155   BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5156 }
5157 
5158 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) {
5159   oop base = ik->static_field_base_raw();
5160   return base->obj_field(_static_TRUE_offset);
5161 }
5162 
5163 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) {
5164   oop base = ik->static_field_base_raw();
5165   return base->obj_field(_static_FALSE_offset);
5166 }
5167 
5168 Symbol* java_lang_Boolean::symbol() {
5169   return vmSymbols::java_lang_Boolean();
5170 }
5171 
5172 #if INCLUDE_CDS
5173 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) {
5174   BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5175 }
5176 #endif
5177 #undef BOOLEAN_CACHE_FIELDS_DO
5178 
5179 jboolean java_lang_Boolean::value(oop obj) {
5180    jvalue v;
5181    java_lang_boxing_object::get_value(obj, &v);
5182    return v.z;
5183 }
5184 
5185 // java_lang_reflect_RecordComponent
5186 
5187 int java_lang_reflect_RecordComponent::_clazz_offset;
5188 int java_lang_reflect_RecordComponent::_name_offset;
5189 int java_lang_reflect_RecordComponent::_type_offset;
5190 int java_lang_reflect_RecordComponent::_accessor_offset;
5191 int java_lang_reflect_RecordComponent::_signature_offset;
5192 int java_lang_reflect_RecordComponent::_annotations_offset;
5193 int java_lang_reflect_RecordComponent::_typeAnnotations_offset;
5194 
5195 #define RECORDCOMPONENT_FIELDS_DO(macro) \
5196   macro(_clazz_offset,       k, "clazz",       class_signature,  false); \
5197   macro(_name_offset,        k, "name",        string_signature, false); \
5198   macro(_type_offset,        k, "type",        class_signature,  false); \
5199   macro(_accessor_offset,    k, "accessor",    reflect_method_signature, false); \
5200   macro(_signature_offset,   k, "signature",   string_signature, false); \
5201   macro(_annotations_offset, k, "annotations", byte_array_signature,     false); \
5202   macro(_typeAnnotations_offset, k, "typeAnnotations", byte_array_signature, false);
5203 
5204 // Support for java_lang_reflect_RecordComponent
5205 void java_lang_reflect_RecordComponent::compute_offsets() {
5206   InstanceKlass* k = vmClasses::RecordComponent_klass();
5207   RECORDCOMPONENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5208 }
5209 
5210 #if INCLUDE_CDS
5211 void java_lang_reflect_RecordComponent::serialize_offsets(SerializeClosure* f) {
5212   RECORDCOMPONENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5213 }
5214 #endif
5215 
5216 void java_lang_reflect_RecordComponent::set_clazz(oop element, oop value) {
5217   element->obj_field_put(_clazz_offset, value);
5218 }
5219 
5220 void java_lang_reflect_RecordComponent::set_name(oop element, oop value) {
5221   element->obj_field_put(_name_offset, value);
5222 }
5223 
5224 void java_lang_reflect_RecordComponent::set_type(oop element, oop value) {
5225   element->obj_field_put(_type_offset, value);
5226 }
5227 
5228 void java_lang_reflect_RecordComponent::set_accessor(oop element, oop value) {
5229   element->obj_field_put(_accessor_offset, value);
5230 }
5231 
5232 void java_lang_reflect_RecordComponent::set_signature(oop element, oop value) {
5233   element->obj_field_put(_signature_offset, value);
5234 }
5235 
5236 void java_lang_reflect_RecordComponent::set_annotations(oop element, oop value) {
5237   element->obj_field_put(_annotations_offset, value);
5238 }
5239 
5240 void java_lang_reflect_RecordComponent::set_typeAnnotations(oop element, oop value) {
5241   element->obj_field_put(_typeAnnotations_offset, value);
5242 }
5243 
5244 // java_lang_InternalError
5245 int java_lang_InternalError::_during_unsafe_access_offset;
5246 
5247 void java_lang_InternalError::set_during_unsafe_access(oop internal_error) {
5248   internal_error->bool_field_put(_during_unsafe_access_offset, true);
5249 }
5250 
5251 jboolean java_lang_InternalError::during_unsafe_access(oop internal_error) {
5252   return internal_error->bool_field(_during_unsafe_access_offset);
5253 }
5254 
5255 void java_lang_InternalError::compute_offsets() {
5256   INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
5257 }
5258 
5259 #if INCLUDE_CDS
5260 void java_lang_InternalError::serialize_offsets(SerializeClosure* f) {
5261   INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
5262 }
5263 #endif
5264 
5265 #define BASIC_JAVA_CLASSES_DO_PART1(f) \
5266   f(java_lang_Class) \
5267   f(java_lang_String) \
5268   f(java_lang_ref_Reference) \
5269   //end
5270 
5271 #define BASIC_JAVA_CLASSES_DO_PART2(f) \
5272   f(java_lang_System) \
5273   f(java_lang_ClassLoader) \
5274   f(java_lang_Throwable) \
5275   f(java_lang_Thread) \
5276   f(java_lang_Thread_FieldHolder) \
5277   f(java_lang_Thread_Constants) \
5278   f(java_lang_ThreadGroup) \
5279   f(java_lang_VirtualThread) \
5280   f(java_lang_InternalError) \
5281   f(java_lang_AssertionStatusDirectives) \
5282   f(java_lang_ref_SoftReference) \
5283   f(java_lang_invoke_MethodHandle) \
5284   f(java_lang_invoke_DirectMethodHandle) \
5285   f(java_lang_invoke_MemberName) \
5286   f(java_lang_invoke_ResolvedMethodName) \
5287   f(java_lang_invoke_LambdaForm) \
5288   f(java_lang_invoke_MethodType) \
5289   f(java_lang_invoke_CallSite) \
5290   f(java_lang_invoke_ConstantCallSite) \
5291   f(java_lang_invoke_MethodHandleNatives_CallSiteContext) \
5292   f(java_security_AccessControlContext) \
5293   f(java_lang_reflect_AccessibleObject) \
5294   f(java_lang_reflect_Method) \
5295   f(java_lang_reflect_Constructor) \
5296   f(java_lang_reflect_Field) \
5297   f(java_lang_reflect_RecordComponent) \
5298   f(reflect_ConstantPool) \
5299   f(java_lang_reflect_Parameter) \
5300   f(java_lang_Module) \
5301   f(java_lang_StackTraceElement) \
5302   f(java_lang_ClassFrameInfo) \
5303   f(java_lang_StackFrameInfo) \
5304   f(java_lang_LiveStackFrameInfo) \
5305   f(jdk_internal_vm_ContinuationScope) \
5306   f(jdk_internal_vm_Continuation) \
5307   f(jdk_internal_vm_StackChunk) \
5308   f(java_util_concurrent_locks_AbstractOwnableSynchronizer) \
5309   f(jdk_internal_foreign_abi_NativeEntryPoint) \
5310   f(jdk_internal_foreign_abi_ABIDescriptor) \
5311   f(jdk_internal_foreign_abi_VMStorage) \
5312   f(jdk_internal_foreign_abi_CallConv) \
5313   f(jdk_internal_misc_UnsafeConstants) \
5314   f(java_lang_boxing_object) \
5315   f(vector_VectorPayload) \
5316   //end
5317 
5318 #define BASIC_JAVA_CLASSES_DO(f) \
5319         BASIC_JAVA_CLASSES_DO_PART1(f) \
5320         BASIC_JAVA_CLASSES_DO_PART2(f)
5321 
5322 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
5323 
5324 // Compute field offsets of all the classes in this file
5325 void JavaClasses::compute_offsets() {
5326   if (UseSharedSpaces) {
5327     JVMTI_ONLY(assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
5328                                                          JvmtiExport::has_early_class_hook_env()),
5329                       "JavaClasses::compute_offsets() must be called in early JVMTI phase."));
5330     // None of the classes used by the rest of this function can be replaced by
5331     // JVMTI ClassFileLoadHook.
5332     // We are safe to use the archived offsets, which have already been restored
5333     // by JavaClasses::serialize_offsets, without computing the offsets again.
5334     return;
5335   }
5336 
5337   // We have already called the compute_offsets() of the
5338   // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String, java_lang_Class and
5339   // java_lang_ref_Reference) earlier inside vmClasses::resolve_all()
5340   BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
5341 }
5342 
5343 #if INCLUDE_CDS
5344 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
5345 
5346 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
5347   BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
5348 }
5349 #endif
5350 
5351 #if INCLUDE_CDS_JAVA_HEAP
5352 bool JavaClasses::is_supported_for_archiving(oop obj) {
5353   Klass* klass = obj->klass();
5354 
5355   if (klass == vmClasses::ClassLoader_klass() ||  // ClassLoader::loader_data is malloc'ed.
5356       // The next 3 classes are used to implement java.lang.invoke, and are not used directly in
5357       // regular Java code. The implementation of java.lang.invoke uses generated hidden classes
5358       // (e.g., as referenced by ResolvedMethodName::vmholder) that are not yet supported by CDS.
5359       // So for now we cannot not support these classes for archiving.
5360       //
5361       // These objects typically are not referenced by static fields, but rather by resolved
5362       // constant pool entries, so excluding them shouldn't affect the archiving of static fields.
5363       klass == vmClasses::ResolvedMethodName_klass() ||
5364       klass == vmClasses::MemberName_klass() ||
5365       klass == vmClasses::Context_klass() ||
5366       // It's problematic to archive Reference objects. One of the reasons is that
5367       // Reference::discovered may pull in unwanted objects (see JDK-8284336)
5368       klass->is_subclass_of(vmClasses::Reference_klass())) {
5369     return false;
5370   }
5371 
5372   return true;
5373 }
5374 #endif
5375 
5376 #ifndef PRODUCT
5377 
5378 // These functions exist to assert the validity of de-serialized offsets in boxing object as a sanity check.
5379 
5380 bool JavaClasses::check_offset(const char *klass_name, int deserialized_offset, const char *field_name,
5381                                const char* field_sig) {
5382   EXCEPTION_MARK;
5383   fieldDescriptor fd;
5384   TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name);
5385   Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
5386   InstanceKlass* ik = InstanceKlass::cast(k);
5387   TempNewSymbol f_name = SymbolTable::new_symbol(field_name);
5388   TempNewSymbol f_sig  = SymbolTable::new_symbol(field_sig);
5389   if (!ik->find_local_field(f_name, f_sig, &fd)) {
5390     tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
5391     return false;
5392   }
5393   if (fd.is_static()) {
5394     tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
5395     return false;
5396   }
5397   if (fd.offset() == deserialized_offset ) {
5398     return true;
5399   } else {
5400     tty->print_cr("Offset of nonstatic field %s.%s is deserialized as %d but should really be %d.",
5401                   klass_name, field_name, deserialized_offset, fd.offset());
5402     return false;
5403   }
5404 }
5405 
5406 void JavaClasses::check_offsets() {
5407   bool valid = true;
5408 
5409 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5410   valid &= check_offset(klass_name, cpp_klass_name :: _##field_name ## _offset, #field_name, field_sig)
5411 
5412 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5413   valid &= check_offset(klass_name, cpp_klass_name :: _##long_ ## field_name ## _offset, #field_name, field_sig)
5414 
5415   // Boxed primitive objects (java_lang_boxing_object)
5416 
5417   CHECK_OFFSET("java/lang/Boolean",   java_lang_boxing_object, value, "Z");
5418   CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
5419   CHECK_OFFSET("java/lang/Float",     java_lang_boxing_object, value, "F");
5420   CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
5421   CHECK_OFFSET("java/lang/Byte",      java_lang_boxing_object, value, "B");
5422   CHECK_OFFSET("java/lang/Short",     java_lang_boxing_object, value, "S");
5423   CHECK_OFFSET("java/lang/Integer",   java_lang_boxing_object, value, "I");
5424   CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
5425 
5426   if (!valid) vm_exit_during_initialization("Field offset verification failed");
5427 }
5428 
5429 #endif // PRODUCT
5430 
5431 int InjectedField::compute_offset() {
5432   InstanceKlass* ik = InstanceKlass::cast(klass());
5433   for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5434     if (!may_be_java && !fs.field_flags().is_injected()) {
5435       // Only look at injected fields
5436       continue;
5437     }
5438     if (fs.name() == name() && fs.signature() == signature()) {
5439       return fs.offset();
5440     }
5441   }
5442   ResourceMark rm;
5443   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)" : "");
5444 #ifndef PRODUCT
5445   ik->print();
5446   tty->print_cr("all fields:");
5447   for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5448     tty->print_cr("  name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
5449   }
5450 #endif //PRODUCT
5451   vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
5452   return -1;
5453 }
5454 
5455 void javaClasses_init() {
5456   JavaClasses::compute_offsets();
5457   JavaClasses::check_offsets();
5458   FilteredFieldsMap::initialize();  // must be done after computing offsets.
5459 }