1 /*
   2  * Copyright (c) 1997, 2023, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "precompiled.hpp"
  26 #include "cds/archiveBuilder.hpp"
  27 #include "cds/archiveHeapLoader.hpp"
  28 #include "cds/heapShared.hpp"
  29 #include "cds/metaspaceShared.hpp"
  30 #include "classfile/altHashing.hpp"
  31 #include "classfile/classLoaderData.inline.hpp"
  32 #include "classfile/javaClasses.inline.hpp"
  33 #include "classfile/javaClassesImpl.hpp"
  34 #include "classfile/javaThreadStatus.hpp"
  35 #include "classfile/moduleEntry.hpp"
  36 #include "classfile/stringTable.hpp"
  37 #include "classfile/symbolTable.hpp"
  38 #include "classfile/systemDictionary.hpp"
  39 #include "classfile/vmClasses.hpp"
  40 #include "classfile/vmSymbols.hpp"
  41 #include "code/debugInfo.hpp"
  42 #include "code/dependencyContext.hpp"
  43 #include "code/pcDesc.hpp"
  44 #include "gc/shared/collectedHeap.inline.hpp"
  45 #include "interpreter/interpreter.hpp"
  46 #include "interpreter/linkResolver.hpp"
  47 #include "jvm.h"
  48 #include "logging/log.hpp"
  49 #include "logging/logStream.hpp"
  50 #include "memory/oopFactory.hpp"
  51 #include "memory/resourceArea.hpp"
  52 #include "memory/universe.hpp"
  53 #include "oops/fieldInfo.hpp"
  54 #include "oops/fieldStreams.inline.hpp"
  55 #include "oops/flatArrayKlass.hpp"
  56 #include "oops/inlineKlass.inline.hpp"
  57 #include "oops/instanceKlass.inline.hpp"
  58 #include "oops/instanceMirrorKlass.inline.hpp"
  59 #include "oops/klass.hpp"
  60 #include "oops/klass.inline.hpp"
  61 #include "oops/method.inline.hpp"
  62 #include "oops/objArrayKlass.hpp"
  63 #include "oops/objArrayOop.inline.hpp"
  64 #include "oops/oopCast.inline.hpp"
  65 #include "oops/oop.inline.hpp"
  66 #include "oops/symbol.hpp"
  67 #include "oops/recordComponent.hpp"
  68 #include "oops/typeArrayOop.inline.hpp"
  69 #include "prims/jvmtiExport.hpp"
  70 #include "prims/methodHandles.hpp"
  71 #include "prims/resolvedMethodTable.hpp"
  72 #include "runtime/continuationEntry.inline.hpp"
  73 #include "runtime/continuationJavaClasses.inline.hpp"
  74 #include "runtime/fieldDescriptor.inline.hpp"
  75 #include "runtime/frame.inline.hpp"
  76 #include "runtime/handles.inline.hpp"
  77 #include "runtime/handshake.hpp"
  78 #include "runtime/init.hpp"
  79 #include "runtime/interfaceSupport.inline.hpp"
  80 #include "runtime/java.hpp"
  81 #include "runtime/javaCalls.hpp"
  82 #include "runtime/javaThread.hpp"
  83 #include "runtime/jniHandles.inline.hpp"
  84 #include "runtime/reflectionUtils.hpp"
  85 #include "runtime/safepoint.hpp"
  86 #include "runtime/safepointVerifiers.hpp"
  87 #include "runtime/threadSMR.hpp"
  88 #include "runtime/vframe.inline.hpp"
  89 #include "runtime/vm_version.hpp"
  90 #include "utilities/align.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::_primary_mirror_offset;
 792 int java_lang_Class::_secondary_mirror_offset;
 793 int java_lang_Class::_signers_offset;
 794 int java_lang_Class::_name_offset;
 795 int java_lang_Class::_source_file_offset;
 796 int java_lang_Class::_classData_offset;
 797 int java_lang_Class::_classRedefinedCount_offset;
 798 
 799 bool java_lang_Class::_offsets_computed = false;
 800 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = nullptr;
 801 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = nullptr;
 802 
 803 #ifdef ASSERT
 804 inline static void assert_valid_static_string_field(fieldDescriptor* fd) {
 805   assert(fd->has_initial_value(), "caller should have checked this");
 806   assert(fd->field_type() == T_OBJECT, "caller should have checked this");
 807   // Can't use vmSymbols::string_signature() as fd->signature() may have been relocated
 808   // during DumpSharedSpaces
 809   assert(fd->signature()->equals("Ljava/lang/String;"), "just checking");
 810 }
 811 #endif
 812 
 813 static void initialize_static_string_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
 814   DEBUG_ONLY(assert_valid_static_string_field(fd);)
 815   oop string = fd->string_initial_value(CHECK);
 816   mirror()->obj_field_put(fd->offset(), string);
 817 }
 818 
 819 static void initialize_static_primitive_field(fieldDescriptor* fd, Handle mirror) {
 820   assert(fd->has_initial_value(), "caller should have checked this");
 821   BasicType t = fd->field_type();
 822   switch (t) {
 823   case T_BYTE:
 824     mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
 825     break;
 826   case T_BOOLEAN:
 827     mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
 828     break;
 829   case T_CHAR:
 830     mirror()->char_field_put(fd->offset(), fd->int_initial_value());
 831     break;
 832   case T_SHORT:
 833     mirror()->short_field_put(fd->offset(), fd->int_initial_value());
 834     break;
 835   case T_INT:
 836     mirror()->int_field_put(fd->offset(), fd->int_initial_value());
 837     break;
 838   case T_FLOAT:
 839     mirror()->float_field_put(fd->offset(), fd->float_initial_value());
 840     break;
 841   case T_DOUBLE:
 842     mirror()->double_field_put(fd->offset(), fd->double_initial_value());
 843     break;
 844   case T_LONG:
 845     mirror()->long_field_put(fd->offset(), fd->long_initial_value());
 846     break;
 847   default:
 848     // Illegal ConstantValue attribute in class file should have been
 849     // caught during classfile parsing.
 850     ShouldNotReachHere();
 851   }
 852 }
 853 
 854 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
 855   assert(mirror.not_null() && fd->is_static(), "just checking");
 856   if (fd->has_initial_value()) {
 857     if (fd->field_type() != T_OBJECT) {
 858       initialize_static_primitive_field(fd, mirror);
 859     } else {
 860       initialize_static_string_field(fd, mirror, CHECK);
 861     }
 862   }
 863 }
 864 
 865 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
 866   assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
 867 
 868   // If the offset was read from the shared archive, it was fixed up already
 869   if (!k->is_shared()) {
 870     if (k->is_instance_klass()) {
 871       // During bootstrap, java.lang.Class wasn't loaded so static field
 872       // offsets were computed without the size added it.  Go back and
 873       // update all the static field offsets to included the size.
 874 
 875       // Unfortunately, the FieldInfo stream is encoded with UNSIGNED5 which doesn't allow
 876       // content updates. So the FieldInfo stream has to be decompressed into a temporary array,
 877       // static fields offsets are updated in this array before reencoding everything into
 878       // a new UNSIGNED5 stream, and substitute it to the old FieldInfo stream.
 879 
 880       int java_fields;
 881       int injected_fields;
 882       InstanceKlass* ik = InstanceKlass::cast(k);
 883       GrowableArray<FieldInfo>* fields =
 884         FieldInfoStream::create_FieldInfoArray(ik->fieldinfo_stream(),
 885                                                &java_fields, &injected_fields);
 886       for (int i = 0; i < fields->length(); i++) {
 887         FieldInfo* fi = fields->adr_at(i);
 888         if (fi->access_flags().is_static()) {
 889           fi->set_offset(fi->offset() + InstanceMirrorKlass::offset_of_static_fields());
 890         }
 891       }
 892       Array<u1>* old_stream = ik->fieldinfo_stream();
 893       assert(fields->length() == (java_fields + injected_fields), "Must be");
 894       Array<u1>* new_fis = FieldInfoStream::create_FieldInfoStream(fields, java_fields, injected_fields, k->class_loader_data(), CHECK);
 895       ik->set_fieldinfo_stream(new_fis);
 896       MetadataFactory::free_array<u1>(k->class_loader_data(), old_stream);
 897     }
 898   }
 899 
 900   if (k->is_shared() && k->has_archived_mirror_index()) {
 901     if (ArchiveHeapLoader::is_in_use()) {
 902       bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK);
 903       assert(present, "Missing archived mirror for %s", k->external_name());
 904       return;
 905     } else {
 906       k->clear_java_mirror_handle();
 907       k->clear_archived_mirror_index();
 908     }
 909   }
 910   create_mirror(k, Handle(), Handle(), Handle(), Handle(), CHECK);
 911 }
 912 
 913 void java_lang_Class::initialize_mirror_fields(Klass* k,
 914                                                Handle mirror,
 915                                                Handle protection_domain,
 916                                                Handle classData,
 917                                                TRAPS) {
 918   // Set protection domain also
 919   set_protection_domain(mirror(), protection_domain());
 920 
 921   // Initialize static fields
 922   InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK);
 923 
 924  // Set classData
 925   set_class_data(mirror(), classData());
 926 }
 927 
 928 // Set the java.lang.Module module field in the java_lang_Class mirror
 929 void java_lang_Class::set_mirror_module_field(JavaThread* current, Klass* k, Handle mirror, Handle module) {
 930   if (module.is_null()) {
 931     // During startup, the module may be null only if java.base has not been defined yet.
 932     // Put the class on the fixup_module_list to patch later when the java.lang.Module
 933     // for java.base is known. But note that since we captured the null module another
 934     // thread may have completed that initialization.
 935 
 936     bool javabase_was_defined = false;
 937     {
 938       MutexLocker m1(current, Module_lock);
 939       // Keep list of classes needing java.base module fixup
 940       if (!ModuleEntryTable::javabase_defined()) {
 941         assert(k->java_mirror() != nullptr, "Class's mirror is null");
 942         k->class_loader_data()->inc_keep_alive();
 943         assert(fixup_module_field_list() != nullptr, "fixup_module_field_list not initialized");
 944         fixup_module_field_list()->push(k);
 945       } else {
 946         javabase_was_defined = true;
 947       }
 948     }
 949 
 950     // If java.base was already defined then patch this particular class with java.base.
 951     if (javabase_was_defined) {
 952       ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
 953       assert(javabase_entry != nullptr && javabase_entry->module() != nullptr,
 954              "Setting class module field, " JAVA_BASE_NAME " should be defined");
 955       Handle javabase_handle(current, javabase_entry->module());
 956       set_module(mirror(), javabase_handle());
 957     }
 958   } else {
 959     assert(Universe::is_module_initialized() ||
 960            (ModuleEntryTable::javabase_defined() &&
 961             (module() == ModuleEntryTable::javabase_moduleEntry()->module())),
 962            "Incorrect java.lang.Module specification while creating mirror");
 963     set_module(mirror(), module());
 964   }
 965 }
 966 
 967 // Statically allocate fixup lists because they always get created.
 968 void java_lang_Class::allocate_fixup_lists() {
 969   GrowableArray<Klass*>* mirror_list =
 970     new (mtClass) GrowableArray<Klass*>(40, mtClass);
 971   set_fixup_mirror_list(mirror_list);
 972 
 973   GrowableArray<Klass*>* module_list =
 974     new (mtModule) GrowableArray<Klass*>(500, mtModule);
 975   set_fixup_module_field_list(module_list);
 976 }
 977 
 978 void java_lang_Class::allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData,
 979                                       Handle& mirror, Handle& comp_mirror, TRAPS) {
 980   // Allocate mirror (java.lang.Class instance)
 981   oop mirror_oop = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(k, CHECK);
 982   mirror = Handle(THREAD, mirror_oop);
 983 
 984   // Setup indirection from mirror->klass
 985   set_klass(mirror(), k);
 986 
 987   InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
 988   assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
 989 
 990   set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
 991 
 992   // It might also have a component mirror.  This mirror must already exist.
 993   if (k->is_array_klass()) {
 994     if (k->is_flatArray_klass()) {
 995       Klass* element_klass = (Klass*) FlatArrayKlass::cast(k)->element_klass();
 996       assert(element_klass->is_inline_klass(), "Must be inline type component");
 997       if (is_scratch) {
 998         comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass));
 999       } else {
1000         InlineKlass* vk = InlineKlass::cast(element_klass);
1001         comp_mirror = Handle(THREAD, vk->val_mirror());
1002       }
1003     } else if (k->is_typeArray_klass()) {
1004       BasicType type = TypeArrayKlass::cast(k)->element_type();
1005       if (is_scratch) {
1006         comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(type));
1007       } else {
1008         comp_mirror = Handle(THREAD, Universe::java_mirror(type));
1009       }
1010     } else {
1011       assert(k->is_objArray_klass(), "Must be");
1012       Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1013       assert(element_klass != nullptr, "Must have an element klass");
1014       oop comp_oop = element_klass->java_mirror();
1015       if (element_klass->is_inline_klass()) {
1016         InlineKlass* ik = InlineKlass::cast(element_klass);
1017         comp_oop = k->name()->is_Q_array_signature() ? ik->val_mirror() : ik->ref_mirror();
1018       }
1019       if (is_scratch) {
1020         comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass));
1021       } else {
1022         comp_mirror = Handle(THREAD, comp_oop);
1023       }
1024     }
1025     assert(comp_mirror() != nullptr, "must have a mirror");
1026 
1027     // Two-way link between the array klass and its component mirror:
1028     // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
1029     set_component_mirror(mirror(), comp_mirror());
1030     // See below for ordering dependencies between field array_klass in component mirror
1031     // and java_mirror in this klass.
1032   } else {
1033     assert(k->is_instance_klass(), "Must be");
1034 
1035     initialize_mirror_fields(k, mirror, protection_domain, classData, THREAD);
1036     if (HAS_PENDING_EXCEPTION) {
1037       // If any of the fields throws an exception like OOM remove the klass field
1038       // from the mirror so GC doesn't follow it after the klass has been deallocated.
1039       // This mirror looks like a primitive type, which logically it is because it
1040       // it represents no class.
1041       set_klass(mirror(), nullptr);
1042       return;
1043     }
1044   }
1045 }
1046 
1047 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
1048                                     Handle module, Handle protection_domain,
1049                                     Handle classData, TRAPS) {
1050   assert(k != nullptr, "Use create_basic_type_mirror for primitive types");
1051   assert(k->java_mirror() == nullptr, "should only assign mirror once");
1052 
1053   // Use this moment of initialization to cache modifier_flags also,
1054   // to support Class.getModifiers().  Instance classes recalculate
1055   // the cached flags after the class file is parsed, but before the
1056   // class is put into the system dictionary.
1057   int computed_modifiers = k->compute_modifier_flags();
1058   k->set_modifier_flags(computed_modifiers);
1059   // Class_klass has to be loaded because it is used to allocate
1060   // the mirror.
1061   if (vmClasses::Class_klass_loaded()) {
1062     Handle mirror;
1063     Handle comp_mirror;
1064 
1065     allocate_mirror(k, /*is_scratch=*/false, protection_domain, classData, mirror, comp_mirror, CHECK);
1066 
1067     // set the classLoader field in the java_lang_Class instance
1068     assert(class_loader() == k->class_loader(), "should be same");
1069     set_class_loader(mirror(), class_loader());
1070 
1071     // Setup indirection from klass->mirror
1072     // after any exceptions can happen during allocations.
1073     k->set_java_mirror(mirror);
1074 
1075     // Set the module field in the java_lang_Class instance.  This must be done
1076     // after the mirror is set.
1077     set_mirror_module_field(THREAD, k, mirror, module);
1078 
1079     if (comp_mirror() != nullptr) {
1080       // Set after k->java_mirror() is published, because compiled code running
1081       // concurrently doesn't expect a k to have a null java_mirror.
1082       release_set_array_klass(comp_mirror(), k);
1083     }
1084 
1085     if (k->is_inline_klass()) {
1086       oop secondary_mirror = create_secondary_mirror(k, mirror, CHECK);
1087       set_primary_mirror(mirror(), mirror());
1088       set_secondary_mirror(mirror(), secondary_mirror);
1089     }
1090     if (DumpSharedSpaces) {
1091       create_scratch_mirror(k, CHECK);
1092     }
1093   } else {
1094     assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1095     fixup_mirror_list()->push(k);
1096   }
1097 }
1098 // Create the secondary mirror for inline class. Sets all the fields of this java.lang.Class
1099 // instance with the same value as the primary mirror
1100 oop java_lang_Class::create_secondary_mirror(Klass* k, Handle mirror, TRAPS) {
1101   assert(k->is_inline_klass(), "primitive class");
1102   // Allocate mirror (java.lang.Class instance)
1103   oop mirror_oop = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(k, CHECK_0);
1104   Handle secondary_mirror(THREAD, mirror_oop);
1105 
1106   java_lang_Class::set_klass(secondary_mirror(), k);
1107   java_lang_Class::set_static_oop_field_count(secondary_mirror(), static_oop_field_count(mirror()));
1108 
1109   set_protection_domain(secondary_mirror(), protection_domain(mirror()));
1110   set_class_loader(secondary_mirror(), class_loader(mirror()));
1111   // ## handle if java.base is not yet defined
1112   set_module(secondary_mirror(), module(mirror()));
1113   set_primary_mirror(secondary_mirror(), mirror());
1114   set_secondary_mirror(secondary_mirror(), secondary_mirror());
1115   return secondary_mirror();
1116 }
1117 
1118 #if INCLUDE_CDS_JAVA_HEAP
1119 // The "scratch mirror" stores the states of the mirror object that can be
1120 // decided at dump time (such as the initial values of the static fields, the
1121 // component mirror, etc). At runtime, more information is added to it by
1122 // java_lang_Class::restore_archived_mirror().
1123 //
1124 // Essentially, /*dumptime*/create_scratch_mirror() + /*runtime*/restore_archived_mirror()
1125 // produces the same result as /*runtime*/create_mirror().
1126 //
1127 // Note: we archive the "scratch mirror" instead of k->java_mirror(), because the
1128 // latter may contain dumptime-specific information that cannot be archived
1129 // (e.g., ClassLoaderData*, or static fields that are modified by Java code execution).
1130 void java_lang_Class::create_scratch_mirror(Klass* k, TRAPS) {
1131   if (k->class_loader() != nullptr &&
1132       k->class_loader() != SystemDictionary::java_platform_loader() &&
1133       k->class_loader() != SystemDictionary::java_system_loader()) {
1134     // We only archive the mirrors of classes loaded by the built-in loaders
1135     return;
1136   }
1137 
1138   Handle protection_domain, classData; // set to null. Will be reinitialized at runtime
1139   Handle mirror;
1140   Handle comp_mirror;
1141   allocate_mirror(k, /*is_scratch=*/true, protection_domain, classData, mirror, comp_mirror, CHECK);
1142 
1143   if (comp_mirror() != nullptr) {
1144     release_set_array_klass(comp_mirror(), k);
1145   }
1146 
1147   HeapShared::set_scratch_java_mirror(k, mirror());
1148 }
1149 
1150 // Returns true if the mirror is updated, false if no archived mirror
1151 // data is present. After the archived mirror object is restored, the
1152 // shared klass' _has_raw_archived_mirror flag is cleared.
1153 bool java_lang_Class::restore_archived_mirror(Klass *k,
1154                                               Handle class_loader, Handle module,
1155                                               Handle protection_domain, TRAPS) {
1156   // Postpone restoring archived mirror until java.lang.Class is loaded. Please
1157   // see more details in vmClasses::resolve_all().
1158   if (!vmClasses::Class_klass_loaded()) {
1159     assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1160     fixup_mirror_list()->push(k);
1161     return true;
1162   }
1163 
1164   oop m = k->archived_java_mirror();
1165   assert(m != nullptr, "must have stored non-null archived mirror");
1166 
1167   // Sanity: clear it now to prevent re-initialization if any of the following fails
1168   k->clear_archived_mirror_index();
1169 
1170   // mirror is archived, restore
1171   log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1172   assert(as_Klass(m) == k, "must be");
1173   Handle mirror(THREAD, m);
1174 
1175   if (!k->is_array_klass()) {
1176     // - local static final fields with initial values were initialized at dump time
1177 
1178     if (protection_domain.not_null()) {
1179       set_protection_domain(mirror(), protection_domain());
1180     }
1181   }
1182 
1183   assert(class_loader() == k->class_loader(), "should be same");
1184   if (class_loader.not_null()) {
1185     set_class_loader(mirror(), class_loader());
1186   }
1187 
1188   k->set_java_mirror(mirror);
1189 
1190   set_mirror_module_field(THREAD, k, mirror, module);
1191 
1192   if (log_is_enabled(Trace, cds, heap, mirror)) {
1193     ResourceMark rm(THREAD);
1194     log_trace(cds, heap, mirror)(
1195         "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1196   }
1197 
1198   return true;
1199 }
1200 #endif // INCLUDE_CDS_JAVA_HEAP
1201 
1202 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1203   assert(_module_offset != 0, "must have been computed already");
1204   set_module(k->java_mirror(), module());
1205 }
1206 
1207 void java_lang_Class::set_oop_size(HeapWord* java_class, size_t size) {
1208   assert(_oop_size_offset != 0, "must be set");
1209   assert(size > 0, "Oop size must be greater than zero, not " SIZE_FORMAT, size);
1210   assert(size <= INT_MAX, "Lossy conversion: " SIZE_FORMAT, size);
1211   *(int*)(((char*)java_class) + _oop_size_offset) = (int)size;
1212 }
1213 
1214 int  java_lang_Class::static_oop_field_count(oop java_class) {
1215   assert(_static_oop_field_count_offset != 0, "must be set");
1216   return java_class->int_field(_static_oop_field_count_offset);
1217 }
1218 
1219 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1220   assert(_static_oop_field_count_offset != 0, "must be set");
1221   java_class->int_field_put(_static_oop_field_count_offset, size);
1222 }
1223 
1224 oop java_lang_Class::protection_domain(oop java_class) {
1225   assert(_protection_domain_offset != 0, "must be set");
1226   return java_class->obj_field(_protection_domain_offset);
1227 }
1228 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1229   assert(_protection_domain_offset != 0, "must be set");
1230   java_class->obj_field_put(_protection_domain_offset, pd);
1231 }
1232 
1233 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1234   assert(_component_mirror_offset != 0, "must be set");
1235     java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1236   }
1237 oop java_lang_Class::component_mirror(oop java_class) {
1238   assert(_component_mirror_offset != 0, "must be set");
1239   return java_class->obj_field(_component_mirror_offset);
1240 }
1241 
1242 oop java_lang_Class::primary_mirror(oop java_class) {
1243   assert(_primary_mirror_offset != 0, "must be set");
1244   return java_class->obj_field(_primary_mirror_offset);
1245 }
1246 
1247 void java_lang_Class::set_primary_mirror(oop java_class, oop mirror) {
1248   assert(_primary_mirror_offset != 0, "must be set");
1249   java_class->obj_field_put(_primary_mirror_offset, mirror);
1250 }
1251 
1252 oop java_lang_Class::secondary_mirror(oop java_class) {
1253   assert(_secondary_mirror_offset != 0, "must be set");
1254   return java_class->obj_field(_secondary_mirror_offset);
1255 }
1256 
1257 void java_lang_Class::set_secondary_mirror(oop java_class, oop mirror) {
1258   assert(_secondary_mirror_offset != 0, "must be set");
1259   java_class->obj_field_put(_secondary_mirror_offset, mirror);
1260 }
1261 
1262 objArrayOop java_lang_Class::signers(oop java_class) {
1263   assert(_signers_offset != 0, "must be set");
1264   return (objArrayOop)java_class->obj_field(_signers_offset);
1265 }
1266 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
1267   assert(_signers_offset != 0, "must be set");
1268   java_class->obj_field_put(_signers_offset, signers);
1269 }
1270 
1271 oop java_lang_Class::class_data(oop java_class) {
1272   assert(_classData_offset != 0, "must be set");
1273   return java_class->obj_field(_classData_offset);
1274 }
1275 void java_lang_Class::set_class_data(oop java_class, oop class_data) {
1276   assert(_classData_offset != 0, "must be set");
1277   java_class->obj_field_put(_classData_offset, class_data);
1278 }
1279 
1280 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1281   assert(_class_loader_offset != 0, "offsets should have been initialized");
1282   java_class->obj_field_put(_class_loader_offset, loader);
1283 }
1284 
1285 oop java_lang_Class::class_loader(oop java_class) {
1286   assert(_class_loader_offset != 0, "must be set");
1287   return java_class->obj_field(_class_loader_offset);
1288 }
1289 
1290 oop java_lang_Class::module(oop java_class) {
1291   assert(_module_offset != 0, "must be set");
1292   return java_class->obj_field(_module_offset);
1293 }
1294 
1295 void java_lang_Class::set_module(oop java_class, oop module) {
1296   assert(_module_offset != 0, "must be set");
1297   java_class->obj_field_put(_module_offset, module);
1298 }
1299 
1300 oop java_lang_Class::name(Handle java_class, TRAPS) {
1301   assert(_name_offset != 0, "must be set");
1302   oop o = java_class->obj_field(_name_offset);
1303   if (o == nullptr) {
1304     o = StringTable::intern(as_external_name(java_class()), THREAD);
1305     java_class->obj_field_put(_name_offset, o);
1306   }
1307   return o;
1308 }
1309 
1310 oop java_lang_Class::source_file(oop java_class) {
1311   assert(_source_file_offset != 0, "must be set");
1312   return java_class->obj_field(_source_file_offset);
1313 }
1314 
1315 void java_lang_Class::set_source_file(oop java_class, oop source_file) {
1316   assert(_source_file_offset != 0, "must be set");
1317   java_class->obj_field_put(_source_file_offset, source_file);
1318 }
1319 
1320 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1321   // This should be improved by adding a field at the Java level or by
1322   // introducing a new VM klass (see comment in ClassFileParser)
1323   oop java_class = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(nullptr, CHECK_NULL);
1324   if (type != T_VOID) {
1325     Klass* aklass = Universe::typeArrayKlassObj(type);
1326     assert(aklass != nullptr, "correct bootstrap");
1327     release_set_array_klass(java_class, aklass);
1328   }
1329 #ifdef ASSERT
1330   InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(vmClasses::Class_klass());
1331   assert(static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1332 #endif
1333   return java_class;
1334 }
1335 
1336 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1337   assert(is_instance(java_class), "must be a Class object");
1338   java_class->metadata_field_put(_klass_offset, klass);
1339 }
1340 
1341 
1342 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1343   assert(is_instance(java_class), "must be a Class object");
1344   Symbol* name = nullptr;
1345   bool is_instance = false;
1346   bool is_Q_descriptor = false;
1347   if (is_primitive(java_class)) {
1348     name = vmSymbols::type_signature(primitive_type(java_class));
1349   } else {
1350     Klass* k = as_Klass(java_class);
1351     is_instance = k->is_instance_klass();
1352     is_Q_descriptor = k->is_inline_klass() && is_secondary_mirror(java_class);
1353     name = k->name();
1354   }
1355   if (name == nullptr) {
1356     st->print("<null>");
1357     return;
1358   }
1359   if (is_instance)  {
1360     st->print(is_Q_descriptor ? "Q" : "L");
1361   }
1362   st->write((char*) name->base(), (int) name->utf8_length());
1363   if (is_instance)  st->print(";");
1364 }
1365 
1366 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) {
1367   assert(is_instance(java_class), "must be a Class object");
1368   Symbol* name;
1369   if (is_primitive(java_class)) {
1370     name = vmSymbols::type_signature(primitive_type(java_class));
1371     // Because this can create a new symbol, the caller has to decrement
1372     // the refcount, so make adjustment here and below for symbols returned
1373     // that are not created or incremented due to a successful lookup.
1374     name->increment_refcount();
1375   } else {
1376     Klass* k = as_Klass(java_class);
1377     if (!k->is_instance_klass()) {
1378       name = k->name();
1379       name->increment_refcount();
1380     } else {
1381       ResourceMark rm;
1382       const char* sigstr;
1383       if (k->is_inline_klass() && is_secondary_mirror(java_class)) {
1384         sigstr = InlineKlass::cast(k)->val_signature_name();
1385       } else {
1386         sigstr = k->signature_name();
1387       }
1388       int siglen = (int) strlen(sigstr);
1389       if (!intern_if_not_found) {
1390         name = SymbolTable::probe(sigstr, siglen);
1391       } else {
1392         name = SymbolTable::new_symbol(sigstr, siglen);
1393       }
1394     }
1395   }
1396   return name;
1397 }
1398 
1399 // Returns the Java name for this Java mirror (Resource allocated)
1400 // See Klass::external_name().
1401 // For primitive type Java mirrors, its type name is returned.
1402 const char* java_lang_Class::as_external_name(oop java_class) {
1403   assert(is_instance(java_class), "must be a Class object");
1404   const char* name = nullptr;
1405   if (is_primitive(java_class)) {
1406     name = type2name(primitive_type(java_class));
1407   } else {
1408     name = as_Klass(java_class)->external_name();
1409   }
1410   if (name == nullptr) {
1411     name = "<null>";
1412   }
1413   return name;
1414 }
1415 
1416 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1417   Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1418   assert(k == nullptr || k->is_klass() && k->is_array_klass(), "should be array klass");
1419   return k;
1420 }
1421 
1422 
1423 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1424   assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1425   java_class->release_metadata_field_put(_array_klass_offset, klass);
1426 }
1427 
1428 
1429 BasicType java_lang_Class::primitive_type(oop java_class) {
1430   assert(is_primitive(java_class), "just checking");
1431   Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1432   BasicType type = T_VOID;
1433   if (ak != nullptr) {
1434     // Note: create_basic_type_mirror above initializes ak to a non-null value.
1435     type = ArrayKlass::cast(ak)->element_type();
1436   } else {
1437     assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
1438   }
1439 #ifdef ASSERT
1440   if (DumpSharedSpaces) {
1441     oop mirror = Universe::java_mirror(type);
1442     oop scratch_mirror = HeapShared::scratch_java_mirror(type);
1443     assert(java_class == mirror || java_class == scratch_mirror, "must be consistent");
1444   } else {
1445     assert(Universe::java_mirror(type) == java_class, "must be consistent");
1446   }
1447 #endif
1448   return type;
1449 }
1450 
1451 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1452   assert(is_instance(java_class), "must be a Class object");
1453   if (is_primitive(java_class)) {
1454     if (reference_klass != nullptr)
1455       (*reference_klass) = nullptr;
1456     return primitive_type(java_class);
1457   } else {
1458     if (reference_klass != nullptr)
1459       (*reference_klass) = as_Klass(java_class);
1460     return T_OBJECT;
1461   }
1462 }
1463 
1464 
1465 oop java_lang_Class::primitive_mirror(BasicType t) {
1466   oop mirror = Universe::java_mirror(t);
1467   assert(mirror != nullptr && mirror->is_a(vmClasses::Class_klass()), "must be a Class");
1468   assert(is_primitive(mirror), "must be primitive");
1469   return mirror;
1470 }
1471 
1472 #define CLASS_FIELDS_DO(macro) \
1473   macro(_classRedefinedCount_offset, k, "classRedefinedCount", int_signature,         false); \
1474   macro(_class_loader_offset,        k, "classLoader",         classloader_signature, false); \
1475   macro(_component_mirror_offset,    k, "componentType",       class_signature,       false); \
1476   macro(_primary_mirror_offset,      k, "primaryType",         class_signature,       false); \
1477   macro(_secondary_mirror_offset,    k, "secondaryType",       class_signature,       false); \
1478   macro(_module_offset,              k, "module",              module_signature,      false); \
1479   macro(_name_offset,                k, "name",                string_signature,      false); \
1480   macro(_classData_offset,           k, "classData",           object_signature,      false);
1481 
1482 void java_lang_Class::compute_offsets() {
1483   if (_offsets_computed) {
1484     return;
1485   }
1486 
1487   _offsets_computed = true;
1488 
1489   InstanceKlass* k = vmClasses::Class_klass();
1490   CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1491 
1492   CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1493 }
1494 
1495 #if INCLUDE_CDS
1496 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1497   f->do_bool(&_offsets_computed);
1498 
1499   CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1500 
1501   CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1502 }
1503 #endif
1504 
1505 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1506   assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1507   return the_class_mirror->int_field(_classRedefinedCount_offset);
1508 }
1509 
1510 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1511   assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1512   the_class_mirror->int_field_put(_classRedefinedCount_offset, value);
1513 }
1514 
1515 
1516 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1517 //       platform thread structure, and a eetop offset which was used for thread
1518 //       local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1519 //       merged, so in the HotSpot VM we just use the eetop field for the thread
1520 //       instead of the privateInfo_offset.
1521 //
1522 // Note: The stackSize field is only present starting in 1.4.
1523 
1524 int java_lang_Thread_FieldHolder::_group_offset;
1525 int java_lang_Thread_FieldHolder::_priority_offset;
1526 int java_lang_Thread_FieldHolder::_stackSize_offset;
1527 int java_lang_Thread_FieldHolder::_daemon_offset;
1528 int java_lang_Thread_FieldHolder::_thread_status_offset;
1529 
1530 #define THREAD_FIELD_HOLDER_FIELDS_DO(macro) \
1531   macro(_group_offset,         k, vmSymbols::group_name(),    threadgroup_signature, false); \
1532   macro(_priority_offset,      k, vmSymbols::priority_name(), int_signature,         false); \
1533   macro(_stackSize_offset,     k, "stackSize",                long_signature,        false); \
1534   macro(_daemon_offset,        k, vmSymbols::daemon_name(),   bool_signature,        false); \
1535   macro(_thread_status_offset, k, "threadStatus",             int_signature,         false)
1536 
1537 void java_lang_Thread_FieldHolder::compute_offsets() {
1538   assert(_group_offset == 0, "offsets should be initialized only once");
1539 
1540   InstanceKlass* k = vmClasses::Thread_FieldHolder_klass();
1541   THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1542 }
1543 
1544 #if INCLUDE_CDS
1545 void java_lang_Thread_FieldHolder::serialize_offsets(SerializeClosure* f) {
1546   THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1547 }
1548 #endif
1549 
1550 oop java_lang_Thread_FieldHolder::threadGroup(oop holder) {
1551   return holder->obj_field(_group_offset);
1552 }
1553 
1554 ThreadPriority java_lang_Thread_FieldHolder::priority(oop holder) {
1555   return (ThreadPriority)holder->int_field(_priority_offset);
1556 }
1557 
1558 void java_lang_Thread_FieldHolder::set_priority(oop holder, ThreadPriority priority) {
1559   holder->int_field_put(_priority_offset, priority);
1560 }
1561 
1562 jlong java_lang_Thread_FieldHolder::stackSize(oop holder) {
1563   return holder->long_field(_stackSize_offset);
1564 }
1565 
1566 bool java_lang_Thread_FieldHolder::is_daemon(oop holder) {
1567   return holder->bool_field(_daemon_offset) != 0;
1568 }
1569 
1570 void java_lang_Thread_FieldHolder::set_daemon(oop holder, bool val) {
1571   assert(val, "daemon status is never turned off");
1572   holder->bool_field_put(_daemon_offset, val);
1573 }
1574 
1575 void java_lang_Thread_FieldHolder::set_thread_status(oop holder, JavaThreadStatus status) {
1576   holder->int_field_put(_thread_status_offset, static_cast<int>(status));
1577 }
1578 
1579 JavaThreadStatus java_lang_Thread_FieldHolder::get_thread_status(oop holder) {
1580   return static_cast<JavaThreadStatus>(holder->int_field(_thread_status_offset));
1581 }
1582 
1583 
1584 int java_lang_Thread_Constants::_static_VTHREAD_GROUP_offset = 0;
1585 
1586 #define THREAD_CONSTANTS_STATIC_FIELDS_DO(macro) \
1587   macro(_static_VTHREAD_GROUP_offset,             k, "VTHREAD_GROUP",             threadgroup_signature, true);
1588 
1589 void java_lang_Thread_Constants::compute_offsets() {
1590   assert(_static_VTHREAD_GROUP_offset == 0, "offsets should be initialized only once");
1591 
1592   InstanceKlass* k = vmClasses::Thread_Constants_klass();
1593   THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1594 }
1595 
1596 #if INCLUDE_CDS
1597 void java_lang_Thread_Constants::serialize_offsets(SerializeClosure* f) {
1598   THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1599 }
1600 #endif
1601 
1602 oop java_lang_Thread_Constants::get_VTHREAD_GROUP() {
1603   InstanceKlass* k = vmClasses::Thread_Constants_klass();
1604   oop base = k->static_field_base_raw();
1605   return base->obj_field(_static_VTHREAD_GROUP_offset);
1606 }
1607 
1608 
1609 int java_lang_Thread::_holder_offset;
1610 int java_lang_Thread::_name_offset;
1611 int java_lang_Thread::_contextClassLoader_offset;
1612 int java_lang_Thread::_inheritedAccessControlContext_offset;
1613 int java_lang_Thread::_eetop_offset;
1614 int java_lang_Thread::_jvmti_thread_state_offset;
1615 int java_lang_Thread::_jvmti_VTMS_transition_disable_count_offset;
1616 int java_lang_Thread::_jvmti_is_in_VTMS_transition_offset;
1617 int java_lang_Thread::_interrupted_offset;
1618 int java_lang_Thread::_tid_offset;
1619 int java_lang_Thread::_continuation_offset;
1620 int java_lang_Thread::_park_blocker_offset;
1621 int java_lang_Thread::_scopedValueBindings_offset;
1622 JFR_ONLY(int java_lang_Thread::_jfr_epoch_offset;)
1623 
1624 #define THREAD_FIELDS_DO(macro) \
1625   macro(_holder_offset,        k, "holder", thread_fieldholder_signature, false); \
1626   macro(_name_offset,          k, vmSymbols::name_name(), string_signature, false); \
1627   macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \
1628   macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \
1629   macro(_eetop_offset,         k, "eetop", long_signature, false); \
1630   macro(_interrupted_offset,   k, "interrupted", bool_signature, false); \
1631   macro(_tid_offset,           k, "tid", long_signature, false); \
1632   macro(_park_blocker_offset,  k, "parkBlocker", object_signature, false); \
1633   macro(_continuation_offset,  k, "cont", continuation_signature, false); \
1634   macro(_scopedValueBindings_offset, k, "scopedValueBindings", object_signature, false);
1635 
1636 void java_lang_Thread::compute_offsets() {
1637   assert(_holder_offset == 0, "offsets should be initialized only once");
1638 
1639   InstanceKlass* k = vmClasses::Thread_klass();
1640   THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1641   THREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1642 }
1643 
1644 #if INCLUDE_CDS
1645 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1646   THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1647   THREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1648 }
1649 #endif
1650 
1651 JavaThread* java_lang_Thread::thread(oop java_thread) {
1652   return reinterpret_cast<JavaThread*>(java_thread->address_field(_eetop_offset));
1653 }
1654 
1655 JavaThread* java_lang_Thread::thread_acquire(oop java_thread) {
1656   return reinterpret_cast<JavaThread*>(java_thread->address_field_acquire(_eetop_offset));
1657 }
1658 
1659 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1660   java_thread->address_field_put(_eetop_offset, (address)thread);
1661 }
1662 
1663 void java_lang_Thread::release_set_thread(oop java_thread, JavaThread* thread) {
1664   java_thread->release_address_field_put(_eetop_offset, (address)thread);
1665 }
1666 
1667 JvmtiThreadState* java_lang_Thread::jvmti_thread_state(oop java_thread) {
1668   return (JvmtiThreadState*)java_thread->address_field(_jvmti_thread_state_offset);
1669 }
1670 
1671 void java_lang_Thread::set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state) {
1672   java_thread->address_field_put(_jvmti_thread_state_offset, (address)state);
1673 }
1674 
1675 int java_lang_Thread::VTMS_transition_disable_count(oop java_thread) {
1676   return java_thread->int_field(_jvmti_VTMS_transition_disable_count_offset);
1677 }
1678 
1679 void java_lang_Thread::inc_VTMS_transition_disable_count(oop java_thread) {
1680   assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1681   int val = VTMS_transition_disable_count(java_thread);
1682   java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val + 1);
1683 }
1684 
1685 void java_lang_Thread::dec_VTMS_transition_disable_count(oop java_thread) {
1686   assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1687   int val = VTMS_transition_disable_count(java_thread);
1688   assert(val > 0, "VTMS_transition_disable_count should never be negative");
1689   java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val - 1);
1690 }
1691 
1692 bool java_lang_Thread::is_in_VTMS_transition(oop java_thread) {
1693   return java_thread->bool_field_volatile(_jvmti_is_in_VTMS_transition_offset);
1694 }
1695 
1696 void java_lang_Thread::set_is_in_VTMS_transition(oop java_thread, bool val) {
1697   java_thread->bool_field_put_volatile(_jvmti_is_in_VTMS_transition_offset, val);
1698 }
1699 
1700 int java_lang_Thread::is_in_VTMS_transition_offset() {
1701   return _jvmti_is_in_VTMS_transition_offset;
1702 }
1703 
1704 void java_lang_Thread::clear_scopedValueBindings(oop java_thread) {
1705   assert(java_thread != nullptr, "need a java_lang_Thread pointer here");
1706   java_thread->obj_field_put(_scopedValueBindings_offset, nullptr);
1707 }
1708 
1709 oop java_lang_Thread::holder(oop java_thread) {
1710   // Note: may return null if the thread is still attaching
1711   return java_thread->obj_field(_holder_offset);
1712 }
1713 
1714 bool java_lang_Thread::interrupted(oop java_thread) {
1715   // Make sure the caller can safely access oops.
1716   assert(Thread::current()->is_VM_thread() ||
1717          (JavaThread::current()->thread_state() != _thread_blocked &&
1718           JavaThread::current()->thread_state() != _thread_in_native),
1719          "Unsafe access to oop");
1720   return java_thread->bool_field_volatile(_interrupted_offset);
1721 }
1722 
1723 void java_lang_Thread::set_interrupted(oop java_thread, bool val) {
1724   // Make sure the caller can safely access oops.
1725   assert(Thread::current()->is_VM_thread() ||
1726          (JavaThread::current()->thread_state() != _thread_blocked &&
1727           JavaThread::current()->thread_state() != _thread_in_native),
1728          "Unsafe access to oop");
1729   java_thread->bool_field_put_volatile(_interrupted_offset, val);
1730 }
1731 
1732 
1733 oop java_lang_Thread::name(oop java_thread) {
1734   return java_thread->obj_field(_name_offset);
1735 }
1736 
1737 
1738 void java_lang_Thread::set_name(oop java_thread, oop name) {
1739   java_thread->obj_field_put(_name_offset, name);
1740 }
1741 
1742 // Convenience macros for setting and getting Thread fields that
1743 // are actually stored in the FieldHolder object of the thread.
1744 // The FieldHolder can be null whilst a thread is attaching via
1745 // JNI, and when the main thread is attaching.
1746 
1747 // The default value should be the default/zero initialized value
1748 // of the field as it would be in java.lang.Thread.FieldHolder.
1749 #define GET_FIELDHOLDER_FIELD(java_thread, field, default_val)  \
1750   {                                                             \
1751     oop holder = java_lang_Thread::holder(java_thread);         \
1752     if (holder != nullptr)                                      \
1753       return java_lang_Thread_FieldHolder::field(holder);       \
1754     else                                                        \
1755       return default_val;                                       \
1756   }
1757 
1758 // We should never be trying to set a field of an attaching thread.
1759 #define SET_FIELDHOLDER_FIELD(java_thread, field, value)        \
1760   {                                                             \
1761     oop holder = java_lang_Thread::holder(java_thread);         \
1762     assert(holder != nullptr, "Thread not fully initialized");  \
1763     java_lang_Thread_FieldHolder::set_##field(holder, value);   \
1764   }
1765 
1766 
1767 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1768   GET_FIELDHOLDER_FIELD(java_thread, priority, (ThreadPriority)0);
1769 }
1770 
1771 
1772 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1773   SET_FIELDHOLDER_FIELD(java_thread, priority, priority)
1774 }
1775 
1776 
1777 oop java_lang_Thread::threadGroup(oop java_thread) {
1778   GET_FIELDHOLDER_FIELD(java_thread, threadGroup, nullptr);
1779 }
1780 
1781 
1782 bool java_lang_Thread::is_alive(oop java_thread) {
1783   JavaThread* thr = java_lang_Thread::thread(java_thread);
1784   return (thr != nullptr);
1785 }
1786 
1787 
1788 bool java_lang_Thread::is_daemon(oop java_thread) {
1789   GET_FIELDHOLDER_FIELD(java_thread, is_daemon, false);
1790 }
1791 
1792 
1793 void java_lang_Thread::set_daemon(oop java_thread) {
1794   SET_FIELDHOLDER_FIELD(java_thread, daemon, true);
1795 }
1796 
1797 oop java_lang_Thread::context_class_loader(oop java_thread) {
1798   return java_thread->obj_field(_contextClassLoader_offset);
1799 }
1800 
1801 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1802   return java_thread->obj_field(_inheritedAccessControlContext_offset);
1803 }
1804 
1805 
1806 jlong java_lang_Thread::stackSize(oop java_thread) {
1807   GET_FIELDHOLDER_FIELD(java_thread, stackSize, 0);
1808 }
1809 
1810 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1811 void java_lang_Thread::set_thread_status(oop java_thread, JavaThreadStatus status) {
1812   SET_FIELDHOLDER_FIELD(java_thread, thread_status, status);
1813 }
1814 
1815 // Read thread status value from threadStatus field in java.lang.Thread java class.
1816 JavaThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1817   // Make sure the caller is operating on behalf of the VM or is
1818   // running VM code (state == _thread_in_vm).
1819   assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1820          JavaThread::current()->thread_state() == _thread_in_vm,
1821          "Java Thread is not running in vm");
1822   GET_FIELDHOLDER_FIELD(java_thread, get_thread_status, JavaThreadStatus::NEW /* not initialized */);
1823 }
1824 
1825 ByteSize java_lang_Thread::thread_id_offset() {
1826   return in_ByteSize(_tid_offset);
1827 }
1828 
1829 oop java_lang_Thread::park_blocker(oop java_thread) {
1830   return java_thread->obj_field(_park_blocker_offset);
1831 }
1832 
1833 oop java_lang_Thread::async_get_stack_trace(oop java_thread, TRAPS) {
1834   ThreadsListHandle tlh(JavaThread::current());
1835   JavaThread* thread;
1836   bool is_virtual = java_lang_VirtualThread::is_instance(java_thread);
1837   if (is_virtual) {
1838     oop carrier_thread = java_lang_VirtualThread::carrier_thread(java_thread);
1839     if (carrier_thread == nullptr) {
1840       return nullptr;
1841     }
1842     thread = java_lang_Thread::thread(carrier_thread);
1843   } else {
1844     thread = java_lang_Thread::thread(java_thread);
1845   }
1846   if (thread == nullptr) {
1847     return nullptr;
1848   }
1849 
1850   class GetStackTraceClosure : public HandshakeClosure {
1851   public:
1852     const Handle _java_thread;
1853     int _depth;
1854     bool _retry_handshake;
1855     GrowableArray<Method*>* _methods;
1856     GrowableArray<int>*     _bcis;
1857 
1858     GetStackTraceClosure(Handle java_thread) :
1859         HandshakeClosure("GetStackTraceClosure"), _java_thread(java_thread), _depth(0), _retry_handshake(false),
1860         _methods(nullptr), _bcis(nullptr) {
1861     }
1862     ~GetStackTraceClosure() {
1863       delete _methods;
1864       delete _bcis;
1865     }
1866 
1867     bool read_reset_retry() {
1868       bool ret = _retry_handshake;
1869       // If we re-execute the handshake this method need to return false
1870       // when the handshake cannot be performed. (E.g. thread terminating)
1871       _retry_handshake = false;
1872       return ret;
1873     }
1874 
1875     void do_thread(Thread* th) {
1876       if (!Thread::current()->is_Java_thread()) {
1877         _retry_handshake = true;
1878         return;
1879       }
1880 
1881       JavaThread* thread = JavaThread::cast(th);
1882 
1883       if (!thread->has_last_Java_frame()) {
1884         return;
1885       }
1886 
1887       bool carrier = false;
1888       if (java_lang_VirtualThread::is_instance(_java_thread())) {
1889         // if (thread->vthread() != _java_thread()) // We might be inside a System.executeOnCarrierThread
1890         const ContinuationEntry* ce = thread->vthread_continuation();
1891         if (ce == nullptr || ce->cont_oop(thread) != java_lang_VirtualThread::continuation(_java_thread())) {
1892           return; // not mounted
1893         }
1894       } else {
1895         carrier = (thread->vthread_continuation() != nullptr);
1896       }
1897 
1898       const int max_depth = MaxJavaStackTraceDepth;
1899       const bool skip_hidden = !ShowHiddenFrames;
1900 
1901       // Pick minimum length that will cover most cases
1902       int init_length = 64;
1903       _methods = new (mtInternal) GrowableArray<Method*>(init_length, mtInternal);
1904       _bcis = new (mtInternal) GrowableArray<int>(init_length, mtInternal);
1905 
1906       int total_count = 0;
1907       for (vframeStream vfst(thread, false, false, carrier); // we don't process frames as we don't care about oops
1908            !vfst.at_end() && (max_depth == 0 || max_depth != total_count);
1909            vfst.next()) {
1910 
1911         if (skip_hidden && (vfst.method()->is_hidden() ||
1912                             vfst.method()->is_continuation_enter_intrinsic())) {
1913           continue;
1914         }
1915 
1916         _methods->push(vfst.method());
1917         _bcis->push(vfst.bci());
1918         total_count++;
1919       }
1920 
1921       _depth = total_count;
1922     }
1923   };
1924 
1925   // Handshake with target
1926   ResourceMark rm(THREAD);
1927   HandleMark   hm(THREAD);
1928   GetStackTraceClosure gstc(Handle(THREAD, java_thread));
1929   do {
1930    Handshake::execute(&gstc, &tlh, thread);
1931   } while (gstc.read_reset_retry());
1932 
1933   // Stop if no stack trace is found.
1934   if (gstc._depth == 0) {
1935     return nullptr;
1936   }
1937 
1938   // Convert to StackTraceElement array
1939   InstanceKlass* k = vmClasses::StackTraceElement_klass();
1940   assert(k != nullptr, "must be loaded in 1.4+");
1941   if (k->should_be_initialized()) {
1942     k->initialize(CHECK_NULL);
1943   }
1944   objArrayHandle trace = oopFactory::new_objArray_handle(k, gstc._depth, CHECK_NULL);
1945 
1946   for (int i = 0; i < gstc._depth; i++) {
1947     methodHandle method(THREAD, gstc._methods->at(i));
1948     oop element = java_lang_StackTraceElement::create(method,
1949                                                       gstc._bcis->at(i),
1950                                                       CHECK_NULL);
1951     trace->obj_at_put(i, element);
1952   }
1953 
1954   return trace();
1955 }
1956 
1957 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1958   JavaThreadStatus status = get_thread_status(java_thread);
1959   switch (status) {
1960     case JavaThreadStatus::NEW                      : return "NEW";
1961     case JavaThreadStatus::RUNNABLE                 : return "RUNNABLE";
1962     case JavaThreadStatus::SLEEPING                 : return "TIMED_WAITING (sleeping)";
1963     case JavaThreadStatus::IN_OBJECT_WAIT           : return "WAITING (on object monitor)";
1964     case JavaThreadStatus::IN_OBJECT_WAIT_TIMED     : return "TIMED_WAITING (on object monitor)";
1965     case JavaThreadStatus::PARKED                   : return "WAITING (parking)";
1966     case JavaThreadStatus::PARKED_TIMED             : return "TIMED_WAITING (parking)";
1967     case JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1968     case JavaThreadStatus::TERMINATED               : return "TERMINATED";
1969     default                       : return "UNKNOWN";
1970   };
1971 }
1972 int java_lang_ThreadGroup::_parent_offset;
1973 int java_lang_ThreadGroup::_name_offset;
1974 int java_lang_ThreadGroup::_maxPriority_offset;
1975 int java_lang_ThreadGroup::_daemon_offset;
1976 
1977 oop  java_lang_ThreadGroup::parent(oop java_thread_group) {
1978   assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1979   return java_thread_group->obj_field(_parent_offset);
1980 }
1981 
1982 // ("name as oop" accessor is not necessary)
1983 
1984 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
1985   oop name = java_thread_group->obj_field(_name_offset);
1986   // ThreadGroup.name can be null
1987   if (name != nullptr) {
1988     return java_lang_String::as_utf8_string(name);
1989   }
1990   return nullptr;
1991 }
1992 
1993 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1994   assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1995   return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1996 }
1997 
1998 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1999   assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
2000   return java_thread_group->bool_field(_daemon_offset) != 0;
2001 }
2002 
2003 #define THREADGROUP_FIELDS_DO(macro) \
2004   macro(_parent_offset,      k, vmSymbols::parent_name(),      threadgroup_signature,         false); \
2005   macro(_name_offset,        k, vmSymbols::name_name(),        string_signature,              false); \
2006   macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature,                 false); \
2007   macro(_daemon_offset,      k, vmSymbols::daemon_name(),      bool_signature,                false);
2008 
2009 void java_lang_ThreadGroup::compute_offsets() {
2010   assert(_parent_offset == 0, "offsets should be initialized only once");
2011 
2012   InstanceKlass* k = vmClasses::ThreadGroup_klass();
2013   THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2014 }
2015 
2016 #if INCLUDE_CDS
2017 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
2018   THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2019 }
2020 #endif
2021 
2022 
2023 // java_lang_VirtualThread
2024 
2025 int java_lang_VirtualThread::static_vthread_scope_offset;
2026 int java_lang_VirtualThread::_carrierThread_offset;
2027 int java_lang_VirtualThread::_continuation_offset;
2028 int java_lang_VirtualThread::_state_offset;
2029 
2030 #define VTHREAD_FIELDS_DO(macro) \
2031   macro(static_vthread_scope_offset,       k, "VTHREAD_SCOPE",      continuationscope_signature, true);  \
2032   macro(_carrierThread_offset,             k, "carrierThread",      thread_signature,            false); \
2033   macro(_continuation_offset,              k, "cont",               continuation_signature,      false); \
2034   macro(_state_offset,                     k, "state",              int_signature,               false)
2035 
2036 
2037 void java_lang_VirtualThread::compute_offsets() {
2038   InstanceKlass* k = vmClasses::VirtualThread_klass();
2039   VTHREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2040 }
2041 
2042 bool java_lang_VirtualThread::is_instance(oop obj) {
2043   return obj != nullptr && is_subclass(obj->klass());
2044 }
2045 
2046 oop java_lang_VirtualThread::carrier_thread(oop vthread) {
2047   oop thread = vthread->obj_field(_carrierThread_offset);
2048   return thread;
2049 }
2050 
2051 oop java_lang_VirtualThread::continuation(oop vthread) {
2052   oop cont = vthread->obj_field(_continuation_offset);
2053   return cont;
2054 }
2055 
2056 int java_lang_VirtualThread::state(oop vthread) {
2057   return vthread->int_field_acquire(_state_offset);
2058 }
2059 
2060 JavaThreadStatus java_lang_VirtualThread::map_state_to_thread_status(int state) {
2061   JavaThreadStatus status = JavaThreadStatus::NEW;
2062   switch (state) {
2063     case NEW :
2064       status = JavaThreadStatus::NEW;
2065       break;
2066     case STARTED :
2067     case RUNNABLE :
2068     case RUNNABLE_SUSPENDED :
2069     case RUNNING :
2070     case PARKING :
2071     case YIELDING :
2072       status = JavaThreadStatus::RUNNABLE;
2073       break;
2074     case PARKED :
2075     case PARKED_SUSPENDED :
2076     case PINNED :
2077       status = JavaThreadStatus::PARKED;
2078       break;
2079     case TERMINATED :
2080       status = JavaThreadStatus::TERMINATED;
2081       break;
2082     default:
2083       ShouldNotReachHere();
2084   }
2085   return status;
2086 }
2087 
2088 #if INCLUDE_CDS
2089 void java_lang_VirtualThread::serialize_offsets(SerializeClosure* f) {
2090    VTHREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2091 }
2092 #endif
2093 
2094 // java_lang_Throwable
2095 
2096 int java_lang_Throwable::_backtrace_offset;
2097 int java_lang_Throwable::_detailMessage_offset;
2098 int java_lang_Throwable::_stackTrace_offset;
2099 int java_lang_Throwable::_depth_offset;
2100 int java_lang_Throwable::_cause_offset;
2101 int java_lang_Throwable::_static_unassigned_stacktrace_offset;
2102 
2103 #define THROWABLE_FIELDS_DO(macro) \
2104   macro(_backtrace_offset,     k, "backtrace",     object_signature,                  false); \
2105   macro(_detailMessage_offset, k, "detailMessage", string_signature,                  false); \
2106   macro(_stackTrace_offset,    k, "stackTrace",    java_lang_StackTraceElement_array, false); \
2107   macro(_depth_offset,         k, "depth",         int_signature,                     false); \
2108   macro(_cause_offset,         k, "cause",         throwable_signature,               false); \
2109   macro(_static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
2110 
2111 void java_lang_Throwable::compute_offsets() {
2112   InstanceKlass* k = vmClasses::Throwable_klass();
2113   THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2114 }
2115 
2116 #if INCLUDE_CDS
2117 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
2118   THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2119 }
2120 #endif
2121 
2122 oop java_lang_Throwable::unassigned_stacktrace() {
2123   InstanceKlass* ik = vmClasses::Throwable_klass();
2124   oop base = ik->static_field_base_raw();
2125   return base->obj_field(_static_unassigned_stacktrace_offset);
2126 }
2127 
2128 oop java_lang_Throwable::backtrace(oop throwable) {
2129   return throwable->obj_field_acquire(_backtrace_offset);
2130 }
2131 
2132 
2133 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
2134   throwable->release_obj_field_put(_backtrace_offset, value);
2135 }
2136 
2137 int java_lang_Throwable::depth(oop throwable) {
2138   return throwable->int_field(_depth_offset);
2139 }
2140 
2141 void java_lang_Throwable::set_depth(oop throwable, int value) {
2142   throwable->int_field_put(_depth_offset, value);
2143 }
2144 
2145 oop java_lang_Throwable::message(oop throwable) {
2146   return throwable->obj_field(_detailMessage_offset);
2147 }
2148 
2149 oop java_lang_Throwable::cause(oop throwable) {
2150   return throwable->obj_field(_cause_offset);
2151 }
2152 
2153 // Return Symbol for detailed_message or null
2154 Symbol* java_lang_Throwable::detail_message(oop throwable) {
2155   PreserveExceptionMark pm(Thread::current());
2156   oop detailed_message = java_lang_Throwable::message(throwable);
2157   if (detailed_message != nullptr) {
2158     return java_lang_String::as_symbol(detailed_message);
2159   }
2160   return nullptr;
2161 }
2162 
2163 void java_lang_Throwable::set_message(oop throwable, oop value) {
2164   throwable->obj_field_put(_detailMessage_offset, value);
2165 }
2166 
2167 
2168 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
2169   throwable->obj_field_put(_stackTrace_offset, st_element_array);
2170 }
2171 
2172 void java_lang_Throwable::clear_stacktrace(oop throwable) {
2173   set_stacktrace(throwable, nullptr);
2174 }
2175 
2176 
2177 void java_lang_Throwable::print(oop throwable, outputStream* st) {
2178   ResourceMark rm;
2179   Klass* k = throwable->klass();
2180   assert(k != nullptr, "just checking");
2181   st->print("%s", k->external_name());
2182   oop msg = message(throwable);
2183   if (msg != nullptr) {
2184     st->print(": %s", java_lang_String::as_utf8_string(msg));
2185   }
2186 }
2187 
2188 // After this many redefines, the stack trace is unreliable.
2189 const int MAX_VERSION = USHRT_MAX;
2190 
2191 static inline bool version_matches(Method* method, int version) {
2192   assert(version < MAX_VERSION, "version is too big");
2193   return method != nullptr && (method->constants()->version() == version);
2194 }
2195 
2196 // This class provides a simple wrapper over the internal structure of
2197 // exception backtrace to insulate users of the backtrace from needing
2198 // to know what it looks like.
2199 // The code of this class is not GC safe. Allocations can only happen
2200 // in expand().
2201 class BacktraceBuilder: public StackObj {
2202  friend class BacktraceIterator;
2203  private:
2204   Handle          _backtrace;
2205   objArrayOop     _head;
2206   typeArrayOop    _methods;
2207   typeArrayOop    _bcis;
2208   objArrayOop     _mirrors;
2209   typeArrayOop    _names; // Needed to insulate method name against redefinition.
2210   // True if the top frame of the backtrace is omitted because it shall be hidden.
2211   bool            _has_hidden_top_frame;
2212   int             _index;
2213   NoSafepointVerifier _nsv;
2214 
2215   enum {
2216     trace_methods_offset = java_lang_Throwable::trace_methods_offset,
2217     trace_bcis_offset    = java_lang_Throwable::trace_bcis_offset,
2218     trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
2219     trace_names_offset   = java_lang_Throwable::trace_names_offset,
2220     trace_conts_offset   = java_lang_Throwable::trace_conts_offset,
2221     trace_next_offset    = java_lang_Throwable::trace_next_offset,
2222     trace_hidden_offset  = java_lang_Throwable::trace_hidden_offset,
2223     trace_size           = java_lang_Throwable::trace_size,
2224     trace_chunk_size     = java_lang_Throwable::trace_chunk_size
2225   };
2226 
2227   // get info out of chunks
2228   static typeArrayOop get_methods(objArrayHandle chunk) {
2229     typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
2230     assert(methods != nullptr, "method array should be initialized in backtrace");
2231     return methods;
2232   }
2233   static typeArrayOop get_bcis(objArrayHandle chunk) {
2234     typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
2235     assert(bcis != nullptr, "bci array should be initialized in backtrace");
2236     return bcis;
2237   }
2238   static objArrayOop get_mirrors(objArrayHandle chunk) {
2239     objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
2240     assert(mirrors != nullptr, "mirror array should be initialized in backtrace");
2241     return mirrors;
2242   }
2243   static typeArrayOop get_names(objArrayHandle chunk) {
2244     typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2245     assert(names != nullptr, "names array should be initialized in backtrace");
2246     return names;
2247   }
2248   static bool has_hidden_top_frame(objArrayHandle chunk) {
2249     oop hidden = chunk->obj_at(trace_hidden_offset);
2250     return hidden != nullptr;
2251   }
2252 
2253  public:
2254 
2255   // constructor for new backtrace
2256   BacktraceBuilder(TRAPS): _head(nullptr), _methods(nullptr), _bcis(nullptr), _mirrors(nullptr), _names(nullptr), _has_hidden_top_frame(false) {
2257     expand(CHECK);
2258     _backtrace = Handle(THREAD, _head);
2259     _index = 0;
2260   }
2261 
2262   BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2263     _methods = get_methods(backtrace);
2264     _bcis = get_bcis(backtrace);
2265     _mirrors = get_mirrors(backtrace);
2266     _names = get_names(backtrace);
2267     _has_hidden_top_frame = has_hidden_top_frame(backtrace);
2268     assert(_methods->length() == _bcis->length() &&
2269            _methods->length() == _mirrors->length() &&
2270            _mirrors->length() == _names->length(),
2271            "method and source information arrays should match");
2272 
2273     // head is the preallocated backtrace
2274     _head = backtrace();
2275     _backtrace = Handle(thread, _head);
2276     _index = 0;
2277   }
2278 
2279   void expand(TRAPS) {
2280     objArrayHandle old_head(THREAD, _head);
2281     PauseNoSafepointVerifier pnsv(&_nsv);
2282 
2283     objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2284     objArrayHandle new_head(THREAD, head);
2285 
2286     typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2287     typeArrayHandle new_methods(THREAD, methods);
2288 
2289     typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2290     typeArrayHandle new_bcis(THREAD, bcis);
2291 
2292     objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2293     objArrayHandle new_mirrors(THREAD, mirrors);
2294 
2295     typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2296     typeArrayHandle new_names(THREAD, names);
2297 
2298     if (!old_head.is_null()) {
2299       old_head->obj_at_put(trace_next_offset, new_head());
2300     }
2301     new_head->obj_at_put(trace_methods_offset, new_methods());
2302     new_head->obj_at_put(trace_bcis_offset, new_bcis());
2303     new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2304     new_head->obj_at_put(trace_names_offset, new_names());
2305     new_head->obj_at_put(trace_hidden_offset, nullptr);
2306 
2307     _head    = new_head();
2308     _methods = new_methods();
2309     _bcis = new_bcis();
2310     _mirrors = new_mirrors();
2311     _names  = new_names();
2312     _index = 0;
2313   }
2314 
2315   oop backtrace() {
2316     return _backtrace();
2317   }
2318 
2319   inline void push(Method* method, int bci, TRAPS) {
2320     // Smear the -1 bci to 0 since the array only holds unsigned
2321     // shorts.  The later line number lookup would just smear the -1
2322     // to a 0 even if it could be recorded.
2323     if (bci == SynchronizationEntryBCI) bci = 0;
2324 
2325     if (_index >= trace_chunk_size) {
2326       methodHandle mhandle(THREAD, method);
2327       expand(CHECK);
2328       method = mhandle();
2329     }
2330 
2331     _methods->ushort_at_put(_index, method->orig_method_idnum());
2332     _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2333 
2334     // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2335     // klass owning the symbols alive so their refcounts aren't decremented.
2336     Symbol* name = method->name();
2337     _names->symbol_at_put(_index, name);
2338 
2339     // We need to save the mirrors in the backtrace to keep the class
2340     // from being unloaded while we still have this stack trace.
2341     assert(method->method_holder()->java_mirror() != nullptr, "never push null for mirror");
2342     _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2343 
2344     _index++;
2345   }
2346 
2347   void set_has_hidden_top_frame() {
2348     if (!_has_hidden_top_frame) {
2349       // It would be nice to add java/lang/Boolean::TRUE here
2350       // to indicate that this backtrace has a hidden top frame.
2351       // But this code is used before TRUE is allocated.
2352       // Therefore let's just use an arbitrary legal oop
2353       // available right here. _methods is a short[].
2354       assert(_methods != nullptr, "we need a legal oop");
2355       _has_hidden_top_frame = true;
2356       _head->obj_at_put(trace_hidden_offset, _methods);
2357     }
2358   }
2359 };
2360 
2361 struct BacktraceElement : public StackObj {
2362   int _method_id;
2363   int _bci;
2364   int _version;
2365   Symbol* _name;
2366   Handle _mirror;
2367   BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2368                    _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2369 };
2370 
2371 class BacktraceIterator : public StackObj {
2372   int _index;
2373   objArrayHandle  _result;
2374   objArrayHandle  _mirrors;
2375   typeArrayHandle _methods;
2376   typeArrayHandle _bcis;
2377   typeArrayHandle _names;
2378 
2379   void init(objArrayHandle result, Thread* thread) {
2380     // Get method id, bci, version and mirror from chunk
2381     _result = result;
2382     if (_result.not_null()) {
2383       _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2384       _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2385       _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2386       _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2387       _index = 0;
2388     }
2389   }
2390  public:
2391   BacktraceIterator(objArrayHandle result, Thread* thread) {
2392     init(result, thread);
2393     assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2394   }
2395 
2396   BacktraceElement next(Thread* thread) {
2397     BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2398                         _methods->ushort_at(_index),
2399                         Backtrace::version_at(_bcis->int_at(_index)),
2400                         Backtrace::bci_at(_bcis->int_at(_index)),
2401                         _names->symbol_at(_index));
2402     _index++;
2403 
2404     if (_index >= java_lang_Throwable::trace_chunk_size) {
2405       int next_offset = java_lang_Throwable::trace_next_offset;
2406       // Get next chunk
2407       objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2408       init(result, thread);
2409     }
2410     return e;
2411   }
2412 
2413   bool repeat() {
2414     return _result.not_null() && _mirrors->obj_at(_index) != nullptr;
2415   }
2416 };
2417 
2418 
2419 // Print stack trace element to resource allocated buffer
2420 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2421                                           int version, int bci, Symbol* name) {
2422   ResourceMark rm;
2423 
2424   // Get strings and string lengths
2425   InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2426   const char* klass_name  = holder->external_name();
2427   int buf_len = (int)strlen(klass_name);
2428 
2429   char* method_name = name->as_C_string();
2430   buf_len += (int)strlen(method_name);
2431 
2432   char* source_file_name = nullptr;
2433   Symbol* source = Backtrace::get_source_file_name(holder, version);
2434   if (source != nullptr) {
2435     source_file_name = source->as_C_string();
2436     buf_len += (int)strlen(source_file_name);
2437   }
2438 
2439   char *module_name = nullptr, *module_version = nullptr;
2440   ModuleEntry* module = holder->module();
2441   if (module->is_named()) {
2442     module_name = module->name()->as_C_string();
2443     buf_len += (int)strlen(module_name);
2444     if (module->version() != nullptr) {
2445       module_version = module->version()->as_C_string();
2446       buf_len += (int)strlen(module_version);
2447     }
2448   }
2449 
2450   // Allocate temporary buffer with extra space for formatting and line number
2451   const size_t buf_size = buf_len + 64;
2452   char* buf = NEW_RESOURCE_ARRAY(char, buf_size);
2453 
2454   // Print stack trace line in buffer
2455   size_t buf_off = os::snprintf_checked(buf, buf_size, "\tat %s.%s(", klass_name, method_name);
2456 
2457   // Print module information
2458   if (module_name != nullptr) {
2459     if (module_version != nullptr) {
2460       buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s@%s/", module_name, module_version);
2461     } else {
2462       buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s/", module_name);
2463     }
2464   }
2465 
2466   // The method can be null if the requested class version is gone
2467   Method* method = holder->method_with_orig_idnum(method_id, version);
2468   if (!version_matches(method, version)) {
2469     strcat(buf, "Redefined)");
2470   } else {
2471     int line_number = Backtrace::get_line_number(method, bci);
2472     if (line_number == -2) {
2473       strcat(buf, "Native Method)");
2474     } else {
2475       if (source_file_name != nullptr && (line_number != -1)) {
2476         // Sourcename and linenumber
2477         buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s:%d)", source_file_name, line_number);
2478       } else if (source_file_name != nullptr) {
2479         // Just sourcename
2480         buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s)", source_file_name);
2481       } else {
2482         // Neither sourcename nor linenumber
2483         buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "Unknown Source)");
2484       }
2485       CompiledMethod* nm = method->code();
2486       if (WizardMode && nm != nullptr) {
2487         os::snprintf_checked(buf + buf_off, buf_size - buf_off, "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
2488       }
2489     }
2490   }
2491 
2492   st->print_cr("%s", buf);
2493 }
2494 
2495 void java_lang_Throwable::print_stack_element(outputStream *st, Method* method, int bci) {
2496   Handle mirror (Thread::current(),  method->method_holder()->java_mirror());
2497   int method_id = method->orig_method_idnum();
2498   int version = method->constants()->version();
2499   print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2500 }
2501 
2502 /**
2503  * Print the throwable message and its stack trace plus all causes by walking the
2504  * cause chain.  The output looks the same as of Throwable.printStackTrace().
2505  */
2506 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2507   // First, print the message.
2508   print(throwable(), st);
2509   st->cr();
2510 
2511   // Now print the stack trace.
2512   JavaThread* THREAD = JavaThread::current(); // For exception macros.
2513   while (throwable.not_null()) {
2514     objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2515     if (result.is_null()) {
2516       st->print_raw_cr("\t<<no stack trace available>>");
2517       return;
2518     }
2519     BacktraceIterator iter(result, THREAD);
2520 
2521     while (iter.repeat()) {
2522       BacktraceElement bte = iter.next(THREAD);
2523       print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2524     }
2525     {
2526       // Call getCause() which doesn't necessarily return the _cause field.
2527       ExceptionMark em(THREAD);
2528       JavaValue cause(T_OBJECT);
2529       JavaCalls::call_virtual(&cause,
2530                               throwable,
2531                               throwable->klass(),
2532                               vmSymbols::getCause_name(),
2533                               vmSymbols::void_throwable_signature(),
2534                               THREAD);
2535       // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2536       if (HAS_PENDING_EXCEPTION) {
2537         CLEAR_PENDING_EXCEPTION;
2538         throwable = Handle();
2539       } else {
2540         throwable = Handle(THREAD, cause.get_oop());
2541         if (throwable.not_null()) {
2542           st->print("Caused by: ");
2543           print(throwable(), st);
2544           st->cr();
2545         }
2546       }
2547     }
2548   }
2549 }
2550 
2551 /**
2552  * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2553  */
2554 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2555   assert(throwable->is_a(vmClasses::Throwable_klass()), "Throwable instance expected");
2556   JavaValue result(T_VOID);
2557   JavaCalls::call_virtual(&result,
2558                           throwable,
2559                           vmClasses::Throwable_klass(),
2560                           vmSymbols::printStackTrace_name(),
2561                           vmSymbols::void_method_signature(),
2562                           THREAD);
2563 }
2564 
2565 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2566   if (!StackTraceInThrowable) return;
2567   ResourceMark rm(THREAD);
2568 
2569   // Start out by clearing the backtrace for this object, in case the VM
2570   // runs out of memory while allocating the stack trace
2571   set_backtrace(throwable(), nullptr);
2572   // Clear lazily constructed Java level stacktrace if refilling occurs
2573   // This is unnecessary in 1.7+ but harmless
2574   clear_stacktrace(throwable());
2575 
2576   int max_depth = MaxJavaStackTraceDepth;
2577   JavaThread* thread = THREAD;
2578 
2579   BacktraceBuilder bt(CHECK);
2580 
2581   // If there is no Java frame just return the method that was being called
2582   // with bci 0
2583   if (!thread->has_last_Java_frame()) {
2584     if (max_depth >= 1 && method() != nullptr) {
2585       bt.push(method(), 0, CHECK);
2586       log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2587       set_depth(throwable(), 1);
2588       set_backtrace(throwable(), bt.backtrace());
2589     }
2590     return;
2591   }
2592 
2593   // Instead of using vframe directly, this version of fill_in_stack_trace
2594   // basically handles everything by hand. This significantly improved the
2595   // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2596   // See bug 6333838 for  more details.
2597   // The "ASSERT" here is to verify this method generates the exactly same stack
2598   // trace as utilizing vframe.
2599 #ifdef ASSERT
2600   vframeStream st(thread, false /* stop_at_java_call_stub */, false /* process_frames */);
2601 #endif
2602   int total_count = 0;
2603   RegisterMap map(thread,
2604                   RegisterMap::UpdateMap::skip,
2605                   RegisterMap::ProcessFrames::skip,
2606                   RegisterMap::WalkContinuation::include);
2607   int decode_offset = 0;
2608   CompiledMethod* nm = nullptr;
2609   bool skip_fillInStackTrace_check = false;
2610   bool skip_throwableInit_check = false;
2611   bool skip_hidden = !ShowHiddenFrames;
2612   bool show_carrier = ShowCarrierFrames;
2613   ContinuationEntry* cont_entry = thread->last_continuation();
2614   for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2615     Method* method = nullptr;
2616     int bci = 0;
2617 
2618     // Compiled java method case.
2619     if (decode_offset != 0) {
2620       DebugInfoReadStream stream(nm, decode_offset);
2621       decode_offset = stream.read_int();
2622       method = (Method*)nm->metadata_at(stream.read_int());
2623       bci = stream.read_bci();
2624     } else {
2625       if (fr.is_first_frame()) break;
2626 
2627       if (Continuation::is_continuation_enterSpecial(fr)) {
2628         assert(cont_entry == Continuation::get_continuation_entry_for_entry_frame(thread, fr), "");
2629         if (!show_carrier && cont_entry->is_virtual_thread()) {
2630           break;
2631         }
2632         cont_entry = cont_entry->parent();
2633       }
2634 
2635       address pc = fr.pc();
2636       if (fr.is_interpreted_frame()) {
2637         address bcp;
2638         if (!map.in_cont()) {
2639           bcp = fr.interpreter_frame_bcp();
2640           method = fr.interpreter_frame_method();
2641         } else {
2642           bcp = map.stack_chunk()->interpreter_frame_bcp(fr);
2643           method = map.stack_chunk()->interpreter_frame_method(fr);
2644         }
2645         bci =  method->bci_from(bcp);
2646         fr = fr.sender(&map);
2647       } else {
2648         CodeBlob* cb = fr.cb();
2649         // HMMM QQQ might be nice to have frame return nm as null if cb is non-null
2650         // but non nmethod
2651         fr = fr.sender(&map);
2652         if (cb == nullptr || !cb->is_compiled()) {
2653           continue;
2654         }
2655         nm = cb->as_compiled_method();
2656         assert(nm->method() != nullptr, "must be");
2657         if (nm->method()->is_native()) {
2658           method = nm->method();
2659           bci = 0;
2660         } else {
2661           PcDesc* pd = nm->pc_desc_at(pc);
2662           decode_offset = pd->scope_decode_offset();
2663           // if decode_offset is not equal to 0, it will execute the
2664           // "compiled java method case" at the beginning of the loop.
2665           continue;
2666         }
2667       }
2668     }
2669 #ifdef ASSERT
2670     if (!st.at_end()) { // TODO LOOM remove once we show only vthread trace
2671       assert(st.method() == method && st.bci() == bci, "Wrong stack trace");
2672       st.next();
2673     }
2674 #endif
2675 
2676     // the format of the stacktrace will be:
2677     // - 1 or more fillInStackTrace frames for the exception class (skipped)
2678     // - 0 or more <init> methods for the exception class (skipped)
2679     // - rest of the stack
2680 
2681     if (!skip_fillInStackTrace_check) {
2682       if (method->name() == vmSymbols::fillInStackTrace_name() &&
2683           throwable->is_a(method->method_holder())) {
2684         continue;
2685       }
2686       else {
2687         skip_fillInStackTrace_check = true; // gone past them all
2688       }
2689     }
2690     if (!skip_throwableInit_check) {
2691       assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2692 
2693       // skip <init> methods of the exception class and superclasses
2694       // This is similar to classic VM.
2695       if (method->is_object_constructor() &&
2696           throwable->is_a(method->method_holder())) {
2697         continue;
2698       } else {
2699         // there are none or we've seen them all - either way stop checking
2700         skip_throwableInit_check = true;
2701       }
2702     }
2703     if (method->is_hidden() || method->is_continuation_enter_intrinsic()) {
2704       if (skip_hidden) {
2705         if (total_count == 0) {
2706           // The top frame will be hidden from the stack trace.
2707           bt.set_has_hidden_top_frame();
2708         }
2709         continue;
2710       }
2711     }
2712 
2713     bt.push(method, bci, CHECK);
2714     total_count++;
2715   }
2716 
2717   log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2718 
2719   // Put completed stack trace into throwable object
2720   set_backtrace(throwable(), bt.backtrace());
2721   set_depth(throwable(), total_count);
2722 }
2723 
2724 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2725   // No-op if stack trace is disabled
2726   if (!StackTraceInThrowable) {
2727     return;
2728   }
2729 
2730   // Disable stack traces for some preallocated out of memory errors
2731   if (!Universe::should_fill_in_stack_trace(throwable)) {
2732     return;
2733   }
2734 
2735   JavaThread* THREAD = JavaThread::current(); // For exception macros.
2736   PreserveExceptionMark pm(THREAD);
2737 
2738   fill_in_stack_trace(throwable, method, THREAD);
2739   // Ignore exceptions thrown during stack trace filling (OOM) and reinstall the
2740   // original exception via the PreserveExceptionMark destructor.
2741   CLEAR_PENDING_EXCEPTION;
2742 }
2743 
2744 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2745   // Allocate stack trace - backtrace is created but not filled in
2746 
2747   // No-op if stack trace is disabled
2748   if (!StackTraceInThrowable) return;
2749   BacktraceBuilder bt(CHECK);   // creates a backtrace
2750   set_backtrace(throwable(), bt.backtrace());
2751 }
2752 
2753 
2754 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2755   // Fill in stack trace into preallocated backtrace (no GC)
2756 
2757   // No-op if stack trace is disabled
2758   if (!StackTraceInThrowable) return;
2759 
2760   assert(throwable->is_a(vmClasses::Throwable_klass()), "sanity check");
2761 
2762   JavaThread* THREAD = JavaThread::current(); // For exception macros.
2763 
2764   objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2765   assert(backtrace.not_null(), "backtrace should have been preallocated");
2766 
2767   ResourceMark rm(THREAD);
2768   vframeStream st(THREAD, false /* stop_at_java_call_stub */, false /* process_frames */);
2769 
2770   BacktraceBuilder bt(THREAD, backtrace);
2771 
2772   // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2773   // methods as preallocated errors aren't created by "java" code.
2774 
2775   // fill in as much stack trace as possible
2776   int chunk_count = 0;
2777   for (;!st.at_end(); st.next()) {
2778     bt.push(st.method(), st.bci(), CHECK);
2779     chunk_count++;
2780 
2781     // Bail-out for deep stacks
2782     if (chunk_count >= trace_chunk_size) break;
2783   }
2784   set_depth(throwable(), chunk_count);
2785   log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2786 
2787   // We support the Throwable immutability protocol defined for Java 7.
2788   java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2789   assert(java_lang_Throwable::unassigned_stacktrace() != nullptr, "not initialized");
2790 }
2791 
2792 void java_lang_Throwable::get_stack_trace_elements(int depth, Handle backtrace,
2793                                                    objArrayHandle stack_trace_array_h, TRAPS) {
2794 
2795   if (backtrace.is_null() || stack_trace_array_h.is_null()) {
2796     THROW(vmSymbols::java_lang_NullPointerException());
2797   }
2798 
2799   assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2800 
2801   if (stack_trace_array_h->length() != depth) {
2802     THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2803   }
2804 
2805   objArrayHandle result(THREAD, objArrayOop(backtrace()));
2806   BacktraceIterator iter(result, THREAD);
2807 
2808   int index = 0;
2809   while (iter.repeat()) {
2810     BacktraceElement bte = iter.next(THREAD);
2811 
2812     Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2813 
2814     if (stack_trace_element.is_null()) {
2815       THROW(vmSymbols::java_lang_NullPointerException());
2816     }
2817 
2818     InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2819     methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2820 
2821     java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2822                                          method,
2823                                          bte._version,
2824                                          bte._bci,
2825                                          bte._name,
2826                                          CHECK);
2827   }
2828 }
2829 
2830 Handle java_lang_Throwable::create_initialization_error(JavaThread* current, Handle throwable) {
2831   // Creates an ExceptionInInitializerError to be recorded as the initialization error when class initialization
2832   // failed due to the passed in 'throwable'. We cannot save 'throwable' directly due to issues with keeping alive
2833   // all objects referenced via its stacktrace. So instead we save a new EIIE instance, with the same message and
2834   // symbolic stacktrace of 'throwable'.
2835   assert(throwable.not_null(), "shouldn't be");
2836 
2837   // Now create the message from the original exception and thread name.
2838   Symbol* message = java_lang_Throwable::detail_message(throwable());
2839   ResourceMark rm(current);
2840   stringStream st;
2841   st.print("Exception %s%s ", throwable()->klass()->name()->as_klass_external_name(),
2842              message == nullptr ? "" : ":");
2843   if (message == nullptr) {
2844     st.print("[in thread \"%s\"]", current->name());
2845   } else {
2846     st.print("%s [in thread \"%s\"]", message->as_C_string(), current->name());
2847   }
2848 
2849   Symbol* exception_name = vmSymbols::java_lang_ExceptionInInitializerError();
2850   Handle init_error = Exceptions::new_exception(current, exception_name, st.as_string());
2851   // If new_exception returns a different exception while creating the exception,
2852   // abandon the attempt to save the initialization error and return null.
2853   if (init_error->klass()->name() != exception_name) {
2854     log_info(class, init)("Exception thrown while saving initialization exception %s",
2855                         init_error->klass()->external_name());
2856     return Handle();
2857   }
2858 
2859   // Call to java to fill in the stack trace and clear declaringClassObject to
2860   // not keep classes alive in the stack trace.
2861   // call this:  public StackTraceElement[] getStackTrace()
2862   JavaValue result(T_ARRAY);
2863   JavaCalls::call_virtual(&result, throwable,
2864                           vmClasses::Throwable_klass(),
2865                           vmSymbols::getStackTrace_name(),
2866                           vmSymbols::getStackTrace_signature(),
2867                           current);
2868   if (!current->has_pending_exception()){
2869     Handle stack_trace(current, result.get_oop());
2870     assert(stack_trace->is_objArray(), "Should be an array");
2871     java_lang_Throwable::set_stacktrace(init_error(), stack_trace());
2872     // Clear backtrace because the stacktrace should be used instead.
2873     set_backtrace(init_error(), nullptr);
2874   } else {
2875     log_info(class, init)("Exception thrown while getting stack trace for initialization exception %s",
2876                         init_error->klass()->external_name());
2877     current->clear_pending_exception();
2878   }
2879 
2880   return init_error;
2881 }
2882 
2883 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) {
2884   JavaThread* current = JavaThread::current();
2885   objArrayHandle result(current, objArrayOop(backtrace(throwable)));
2886   BacktraceIterator iter(result, current);
2887   // No backtrace available.
2888   if (!iter.repeat()) return false;
2889 
2890   // If the exception happened in a frame that has been hidden, i.e.,
2891   // omitted from the back trace, we can not compute the message.
2892   oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset);
2893   if (hidden != nullptr) {
2894     return false;
2895   }
2896 
2897   // Get first backtrace element.
2898   BacktraceElement bte = iter.next(current);
2899 
2900   InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2901   assert(holder != nullptr, "first element should be non-null");
2902   Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version);
2903 
2904   // Original version is no longer available.
2905   if (m == nullptr || !version_matches(m, bte._version)) {
2906     return false;
2907   }
2908 
2909   *method = m;
2910   *bci = bte._bci;
2911   return true;
2912 }
2913 
2914 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
2915   // Allocate java.lang.StackTraceElement instance
2916   InstanceKlass* k = vmClasses::StackTraceElement_klass();
2917   assert(k != nullptr, "must be loaded in 1.4+");
2918   if (k->should_be_initialized()) {
2919     k->initialize(CHECK_NULL);
2920   }
2921 
2922   Handle element = k->allocate_instance_handle(CHECK_NULL);
2923 
2924   int version = method->constants()->version();
2925   fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_NULL);
2926   return element();
2927 }
2928 
2929 void java_lang_StackTraceElement::fill_in(Handle element,
2930                                           InstanceKlass* holder, const methodHandle& method,
2931                                           int version, int bci, Symbol* name, TRAPS) {
2932   assert(element->is_a(vmClasses::StackTraceElement_klass()), "sanity check");
2933 
2934   ResourceMark rm(THREAD);
2935   HandleMark hm(THREAD);
2936 
2937   // Fill in class name
2938   Handle java_class(THREAD, holder->java_mirror());
2939   oop classname = java_lang_Class::name(java_class, CHECK);
2940   java_lang_StackTraceElement::set_declaringClass(element(), classname);
2941   java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
2942 
2943   oop loader = holder->class_loader();
2944   if (loader != nullptr) {
2945     oop loader_name = java_lang_ClassLoader::name(loader);
2946     if (loader_name != nullptr)
2947       java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
2948   }
2949 
2950   // Fill in method name
2951   oop methodname = StringTable::intern(name, CHECK);
2952   java_lang_StackTraceElement::set_methodName(element(), methodname);
2953 
2954   // Fill in module name and version
2955   ModuleEntry* module = holder->module();
2956   if (module->is_named()) {
2957     oop module_name = StringTable::intern(module->name(), CHECK);
2958     java_lang_StackTraceElement::set_moduleName(element(), module_name);
2959     oop module_version;
2960     if (module->version() != nullptr) {
2961       module_version = StringTable::intern(module->version(), CHECK);
2962     } else {
2963       module_version = nullptr;
2964     }
2965     java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
2966   }
2967 
2968   if (method() == nullptr || !version_matches(method(), version)) {
2969     // The method was redefined, accurate line number information isn't available
2970     java_lang_StackTraceElement::set_fileName(element(), nullptr);
2971     java_lang_StackTraceElement::set_lineNumber(element(), -1);
2972   } else {
2973     Symbol* source;
2974     oop source_file;
2975     int line_number;
2976     decode_file_and_line(java_class, holder, version, method, bci, source, source_file, line_number, CHECK);
2977 
2978     java_lang_StackTraceElement::set_fileName(element(), source_file);
2979     java_lang_StackTraceElement::set_lineNumber(element(), line_number);
2980   }
2981 }
2982 
2983 void java_lang_StackTraceElement::decode_file_and_line(Handle java_class,
2984                                                        InstanceKlass* holder,
2985                                                        int version,
2986                                                        const methodHandle& method,
2987                                                        int bci,
2988                                                        Symbol*& source,
2989                                                        oop& source_file,
2990                                                        int& line_number, TRAPS) {
2991   // Fill in source file name and line number.
2992   source = Backtrace::get_source_file_name(holder, version);
2993   source_file = java_lang_Class::source_file(java_class());
2994   if (source != nullptr) {
2995     // Class was not redefined. We can trust its cache if set,
2996     // else we have to initialize it.
2997     if (source_file == nullptr) {
2998       source_file = StringTable::intern(source, CHECK);
2999       java_lang_Class::set_source_file(java_class(), source_file);
3000     }
3001   } else {
3002     // Class was redefined. Dump the cache if it was set.
3003     if (source_file != nullptr) {
3004       source_file = nullptr;
3005       java_lang_Class::set_source_file(java_class(), source_file);
3006     }
3007   }
3008   line_number = Backtrace::get_line_number(method(), bci);
3009 }
3010 
3011 #if INCLUDE_JVMCI
3012 void java_lang_StackTraceElement::decode(const methodHandle& method, int bci,
3013                                          Symbol*& filename, int& line_number, TRAPS) {
3014   ResourceMark rm(THREAD);
3015   HandleMark hm(THREAD);
3016 
3017   filename = nullptr;
3018   line_number = -1;
3019 
3020   oop source_file;
3021   int version = method->constants()->version();
3022   InstanceKlass* holder = method->method_holder();
3023   Handle java_class(THREAD, holder->java_mirror());
3024   decode_file_and_line(java_class, holder, version, method, bci, filename, source_file, line_number, CHECK);
3025 }
3026 #endif // INCLUDE_JVMCI
3027 
3028 // java_lang_StackFrameInfo
3029 
3030 int java_lang_StackFrameInfo::_memberName_offset;
3031 int java_lang_StackFrameInfo::_bci_offset;
3032 int java_lang_StackFrameInfo::_version_offset;
3033 int java_lang_StackFrameInfo::_contScope_offset;
3034 
3035 #define STACKFRAMEINFO_FIELDS_DO(macro) \
3036   macro(_memberName_offset, k, "memberName", object_signature,            false); \
3037   macro(_bci_offset,        k, "bci",        int_signature,               false); \
3038   macro(_contScope_offset,  k, "contScope",  continuationscope_signature, false)
3039 
3040 void java_lang_StackFrameInfo::compute_offsets() {
3041   InstanceKlass* k = vmClasses::StackFrameInfo_klass();
3042   STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3043   STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3044 }
3045 
3046 #if INCLUDE_CDS
3047 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
3048   STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3049   STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3050 }
3051 #endif
3052 
3053 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) {
3054   HandleMark hm(THREAD);
3055   Handle mname(THREAD, stackFrame->obj_field(_memberName_offset));
3056   Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname());
3057   // we should expand MemberName::name when Throwable uses StackTrace
3058   // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL);
3059   return method;
3060 }
3061 
3062 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS) {
3063   // set Method* or mid/cpref
3064   HandleMark hm(THREAD);
3065   Handle mname(THREAD, stackFrame->obj_field(_memberName_offset));
3066   Handle cont_h (THREAD, cont);
3067   InstanceKlass* ik = method->method_holder();
3068   CallInfo info(method(), ik, CHECK);
3069   MethodHandles::init_method_MemberName(mname, info);
3070   // set bci
3071   java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
3072   // method may be redefined; store the version
3073   int version = method->constants()->version();
3074   assert((jushort)version == version, "version should be short");
3075   java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
3076 
3077   oop contScope = cont_h() != nullptr ? jdk_internal_vm_Continuation::scope(cont_h()) : (oop)nullptr;
3078   java_lang_StackFrameInfo::set_contScope(stackFrame(), contScope);
3079 }
3080 
3081 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
3082   ResourceMark rm(THREAD);
3083   HandleMark hm(THREAD);
3084   Handle mname(THREAD, stackFrame->obj_field(java_lang_StackFrameInfo::_memberName_offset));
3085   Klass* clazz = java_lang_Class::as_Klass(java_lang_invoke_MemberName::clazz(mname()));
3086   InstanceKlass* holder = InstanceKlass::cast(clazz);
3087   Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK);
3088 
3089   short version = stackFrame->short_field(_version_offset);
3090   int bci = stackFrame->int_field(_bci_offset);
3091   Symbol* name = method->name();
3092   java_lang_StackTraceElement::fill_in(stack_trace_element, holder, methodHandle(THREAD, method), version, bci, name, CHECK);
3093 }
3094 
3095 void java_lang_StackFrameInfo::set_version(oop element, short value) {
3096   element->short_field_put(_version_offset, value);
3097 }
3098 
3099 void java_lang_StackFrameInfo::set_bci(oop element, int value) {
3100   assert(value >= 0 && value < max_jushort, "must be a valid bci value");
3101   element->int_field_put(_bci_offset, value);
3102 }
3103 
3104 void java_lang_StackFrameInfo::set_contScope(oop element, oop value) {
3105   element->obj_field_put(_contScope_offset, value);
3106 }
3107 
3108 int java_lang_LiveStackFrameInfo::_monitors_offset;
3109 int java_lang_LiveStackFrameInfo::_locals_offset;
3110 int java_lang_LiveStackFrameInfo::_operands_offset;
3111 int java_lang_LiveStackFrameInfo::_mode_offset;
3112 
3113 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
3114   macro(_monitors_offset,   k, "monitors",    object_array_signature, false); \
3115   macro(_locals_offset,     k, "locals",      object_array_signature, false); \
3116   macro(_operands_offset,   k, "operands",    object_array_signature, false); \
3117   macro(_mode_offset,       k, "mode",        int_signature,          false)
3118 
3119 void java_lang_LiveStackFrameInfo::compute_offsets() {
3120   InstanceKlass* k = vmClasses::LiveStackFrameInfo_klass();
3121   LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3122 }
3123 
3124 #if INCLUDE_CDS
3125 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
3126   LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3127 }
3128 #endif
3129 
3130 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) {
3131   element->obj_field_put(_monitors_offset, value);
3132 }
3133 
3134 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) {
3135   element->obj_field_put(_locals_offset, value);
3136 }
3137 
3138 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) {
3139   element->obj_field_put(_operands_offset, value);
3140 }
3141 
3142 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) {
3143   element->int_field_put(_mode_offset, value);
3144 }
3145 
3146 
3147 // java_lang_AccessibleObject
3148 
3149 int java_lang_reflect_AccessibleObject::_override_offset;
3150 
3151 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
3152   macro(_override_offset, k, "override", bool_signature, false)
3153 
3154 void java_lang_reflect_AccessibleObject::compute_offsets() {
3155   InstanceKlass* k = vmClasses::reflect_AccessibleObject_klass();
3156   ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3157 }
3158 
3159 #if INCLUDE_CDS
3160 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
3161   ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3162 }
3163 #endif
3164 
3165 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
3166   return (jboolean) reflect->bool_field(_override_offset);
3167 }
3168 
3169 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
3170   reflect->bool_field_put(_override_offset, (int) value);
3171 }
3172 
3173 // java_lang_reflect_Method
3174 
3175 int java_lang_reflect_Method::_clazz_offset;
3176 int java_lang_reflect_Method::_name_offset;
3177 int java_lang_reflect_Method::_returnType_offset;
3178 int java_lang_reflect_Method::_parameterTypes_offset;
3179 int java_lang_reflect_Method::_exceptionTypes_offset;
3180 int java_lang_reflect_Method::_slot_offset;
3181 int java_lang_reflect_Method::_modifiers_offset;
3182 int java_lang_reflect_Method::_signature_offset;
3183 int java_lang_reflect_Method::_annotations_offset;
3184 int java_lang_reflect_Method::_parameter_annotations_offset;
3185 int java_lang_reflect_Method::_annotation_default_offset;
3186 
3187 #define METHOD_FIELDS_DO(macro) \
3188   macro(_clazz_offset,          k, vmSymbols::clazz_name(),          class_signature,       false); \
3189   macro(_name_offset,           k, vmSymbols::name_name(),           string_signature,      false); \
3190   macro(_returnType_offset,     k, vmSymbols::returnType_name(),     class_signature,       false); \
3191   macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3192   macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3193   macro(_slot_offset,           k, vmSymbols::slot_name(),           int_signature,         false); \
3194   macro(_modifiers_offset,      k, vmSymbols::modifiers_name(),      int_signature,         false); \
3195   macro(_signature_offset,             k, vmSymbols::signature_name(),             string_signature,     false); \
3196   macro(_annotations_offset,           k, vmSymbols::annotations_name(),           byte_array_signature, false); \
3197   macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
3198   macro(_annotation_default_offset,    k, vmSymbols::annotation_default_name(),    byte_array_signature, false);
3199 
3200 void java_lang_reflect_Method::compute_offsets() {
3201   InstanceKlass* k = vmClasses::reflect_Method_klass();
3202   METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3203 }
3204 
3205 #if INCLUDE_CDS
3206 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
3207   METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3208 }
3209 #endif
3210 
3211 Handle java_lang_reflect_Method::create(TRAPS) {
3212   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3213   Klass* klass = vmClasses::reflect_Method_klass();
3214   // This class is eagerly initialized during VM initialization, since we keep a reference
3215   // to one of the methods
3216   assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
3217   return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
3218 }
3219 
3220 oop java_lang_reflect_Method::clazz(oop reflect) {
3221   return reflect->obj_field(_clazz_offset);
3222 }
3223 
3224 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
3225    reflect->obj_field_put(_clazz_offset, value);
3226 }
3227 
3228 int java_lang_reflect_Method::slot(oop reflect) {
3229   return reflect->int_field(_slot_offset);
3230 }
3231 
3232 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
3233   reflect->int_field_put(_slot_offset, value);
3234 }
3235 
3236 void java_lang_reflect_Method::set_name(oop method, oop value) {
3237   method->obj_field_put(_name_offset, value);
3238 }
3239 
3240 oop java_lang_reflect_Method::return_type(oop method) {
3241   return method->obj_field(_returnType_offset);
3242 }
3243 
3244 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
3245   method->obj_field_put(_returnType_offset, value);
3246 }
3247 
3248 oop java_lang_reflect_Method::parameter_types(oop method) {
3249   return method->obj_field(_parameterTypes_offset);
3250 }
3251 
3252 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
3253   method->obj_field_put(_parameterTypes_offset, value);
3254 }
3255 
3256 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
3257   method->obj_field_put(_exceptionTypes_offset, value);
3258 }
3259 
3260 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
3261   method->int_field_put(_modifiers_offset, value);
3262 }
3263 
3264 void java_lang_reflect_Method::set_signature(oop method, oop value) {
3265   method->obj_field_put(_signature_offset, value);
3266 }
3267 
3268 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
3269   method->obj_field_put(_annotations_offset, value);
3270 }
3271 
3272 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
3273   method->obj_field_put(_parameter_annotations_offset, value);
3274 }
3275 
3276 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
3277   method->obj_field_put(_annotation_default_offset, value);
3278 }
3279 
3280 int java_lang_reflect_Constructor::_clazz_offset;
3281 int java_lang_reflect_Constructor::_parameterTypes_offset;
3282 int java_lang_reflect_Constructor::_exceptionTypes_offset;
3283 int java_lang_reflect_Constructor::_slot_offset;
3284 int java_lang_reflect_Constructor::_modifiers_offset;
3285 int java_lang_reflect_Constructor::_signature_offset;
3286 int java_lang_reflect_Constructor::_annotations_offset;
3287 int java_lang_reflect_Constructor::_parameter_annotations_offset;
3288 
3289 #define CONSTRUCTOR_FIELDS_DO(macro) \
3290   macro(_clazz_offset,          k, vmSymbols::clazz_name(),          class_signature,       false); \
3291   macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3292   macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3293   macro(_slot_offset,           k, vmSymbols::slot_name(),           int_signature,         false); \
3294   macro(_modifiers_offset,      k, vmSymbols::modifiers_name(),      int_signature,         false); \
3295   macro(_signature_offset,             k, vmSymbols::signature_name(),             string_signature,     false); \
3296   macro(_annotations_offset,           k, vmSymbols::annotations_name(),           byte_array_signature, false); \
3297   macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
3298 
3299 void java_lang_reflect_Constructor::compute_offsets() {
3300   InstanceKlass* k = vmClasses::reflect_Constructor_klass();
3301   CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3302 }
3303 
3304 #if INCLUDE_CDS
3305 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
3306   CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3307 }
3308 #endif
3309 
3310 Handle java_lang_reflect_Constructor::create(TRAPS) {
3311   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3312   Symbol* name = vmSymbols::java_lang_reflect_Constructor();
3313   Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3314   InstanceKlass* ik = InstanceKlass::cast(k);
3315   // Ensure it is initialized
3316   ik->initialize(CHECK_NH);
3317   return ik->allocate_instance_handle(THREAD);
3318 }
3319 
3320 oop java_lang_reflect_Constructor::clazz(oop reflect) {
3321   return reflect->obj_field(_clazz_offset);
3322 }
3323 
3324 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
3325    reflect->obj_field_put(_clazz_offset, value);
3326 }
3327 
3328 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
3329   return constructor->obj_field(_parameterTypes_offset);
3330 }
3331 
3332 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
3333   constructor->obj_field_put(_parameterTypes_offset, value);
3334 }
3335 
3336 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
3337   constructor->obj_field_put(_exceptionTypes_offset, value);
3338 }
3339 
3340 int java_lang_reflect_Constructor::slot(oop reflect) {
3341   return reflect->int_field(_slot_offset);
3342 }
3343 
3344 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
3345   reflect->int_field_put(_slot_offset, value);
3346 }
3347 
3348 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
3349   constructor->int_field_put(_modifiers_offset, value);
3350 }
3351 
3352 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
3353   constructor->obj_field_put(_signature_offset, value);
3354 }
3355 
3356 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
3357   constructor->obj_field_put(_annotations_offset, value);
3358 }
3359 
3360 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
3361   method->obj_field_put(_parameter_annotations_offset, value);
3362 }
3363 
3364 int java_lang_reflect_Field::_clazz_offset;
3365 int java_lang_reflect_Field::_name_offset;
3366 int java_lang_reflect_Field::_type_offset;
3367 int java_lang_reflect_Field::_slot_offset;
3368 int java_lang_reflect_Field::_modifiers_offset;
3369 int java_lang_reflect_Field::_trusted_final_offset;
3370 int java_lang_reflect_Field::_signature_offset;
3371 int java_lang_reflect_Field::_annotations_offset;
3372 
3373 #define FIELD_FIELDS_DO(macro) \
3374   macro(_clazz_offset,     k, vmSymbols::clazz_name(),     class_signature,  false); \
3375   macro(_name_offset,      k, vmSymbols::name_name(),      string_signature, false); \
3376   macro(_type_offset,      k, vmSymbols::type_name(),      class_signature,  false); \
3377   macro(_slot_offset,      k, vmSymbols::slot_name(),      int_signature,    false); \
3378   macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature,    false); \
3379   macro(_trusted_final_offset,    k, vmSymbols::trusted_final_name(),    bool_signature,       false); \
3380   macro(_signature_offset,        k, vmSymbols::signature_name(),        string_signature,     false); \
3381   macro(_annotations_offset,      k, vmSymbols::annotations_name(),      byte_array_signature, false);
3382 
3383 void java_lang_reflect_Field::compute_offsets() {
3384   InstanceKlass* k = vmClasses::reflect_Field_klass();
3385   FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3386 }
3387 
3388 #if INCLUDE_CDS
3389 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
3390   FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3391 }
3392 #endif
3393 
3394 Handle java_lang_reflect_Field::create(TRAPS) {
3395   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3396   Symbol* name = vmSymbols::java_lang_reflect_Field();
3397   Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3398   InstanceKlass* ik = InstanceKlass::cast(k);
3399   // Ensure it is initialized
3400   ik->initialize(CHECK_NH);
3401   return ik->allocate_instance_handle(THREAD);
3402 }
3403 
3404 oop java_lang_reflect_Field::clazz(oop reflect) {
3405   return reflect->obj_field(_clazz_offset);
3406 }
3407 
3408 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
3409   reflect->obj_field_put(_clazz_offset, value);
3410 }
3411 
3412 oop java_lang_reflect_Field::name(oop field) {
3413   return field->obj_field(_name_offset);
3414 }
3415 
3416 void java_lang_reflect_Field::set_name(oop field, oop value) {
3417   field->obj_field_put(_name_offset, value);
3418 }
3419 
3420 oop java_lang_reflect_Field::type(oop field) {
3421   return field->obj_field(_type_offset);
3422 }
3423 
3424 void java_lang_reflect_Field::set_type(oop field, oop value) {
3425   field->obj_field_put(_type_offset, value);
3426 }
3427 
3428 int java_lang_reflect_Field::slot(oop reflect) {
3429   return reflect->int_field(_slot_offset);
3430 }
3431 
3432 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
3433   reflect->int_field_put(_slot_offset, value);
3434 }
3435 
3436 int java_lang_reflect_Field::modifiers(oop field) {
3437   return field->int_field(_modifiers_offset);
3438 }
3439 
3440 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
3441   field->int_field_put(_modifiers_offset, value);
3442 }
3443 
3444 void java_lang_reflect_Field::set_trusted_final(oop field) {
3445   field->bool_field_put(_trusted_final_offset, true);
3446 }
3447 
3448 void java_lang_reflect_Field::set_signature(oop field, oop value) {
3449   field->obj_field_put(_signature_offset, value);
3450 }
3451 
3452 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
3453   field->obj_field_put(_annotations_offset, value);
3454 }
3455 
3456 oop java_lang_reflect_RecordComponent::create(InstanceKlass* holder, RecordComponent* component, TRAPS) {
3457   // Allocate java.lang.reflect.RecordComponent instance
3458   HandleMark hm(THREAD);
3459   InstanceKlass* ik = vmClasses::RecordComponent_klass();
3460   assert(ik != nullptr, "must be loaded");
3461   ik->initialize(CHECK_NULL);
3462 
3463   Handle element = ik->allocate_instance_handle(CHECK_NULL);
3464 
3465   Handle decl_class(THREAD, holder->java_mirror());
3466   java_lang_reflect_RecordComponent::set_clazz(element(), decl_class());
3467 
3468   Symbol* name = holder->constants()->symbol_at(component->name_index()); // name_index is a utf8
3469   oop component_name = StringTable::intern(name, CHECK_NULL);
3470   java_lang_reflect_RecordComponent::set_name(element(), component_name);
3471 
3472   Symbol* type = holder->constants()->symbol_at(component->descriptor_index());
3473   Handle component_type_h =
3474     SystemDictionary::find_java_mirror_for_type(type, holder, SignatureStream::NCDFError, CHECK_NULL);
3475   java_lang_reflect_RecordComponent::set_type(element(), component_type_h());
3476 
3477   Method* accessor_method = nullptr;
3478   {
3479     // Prepend "()" to type to create the full method signature.
3480     ResourceMark rm(THREAD);
3481     int sig_len = type->utf8_length() + 3; // "()" and null char
3482     char* sig = NEW_RESOURCE_ARRAY(char, sig_len);
3483     jio_snprintf(sig, sig_len, "%c%c%s", JVM_SIGNATURE_FUNC, JVM_SIGNATURE_ENDFUNC, type->as_C_string());
3484     TempNewSymbol full_sig = SymbolTable::new_symbol(sig);
3485     accessor_method = holder->find_instance_method(name, full_sig, Klass::PrivateLookupMode::find);
3486   }
3487 
3488   if (accessor_method != nullptr) {
3489     methodHandle method(THREAD, accessor_method);
3490     oop m = Reflection::new_method(method, false, CHECK_NULL);
3491     java_lang_reflect_RecordComponent::set_accessor(element(), m);
3492   } else {
3493     java_lang_reflect_RecordComponent::set_accessor(element(), nullptr);
3494   }
3495 
3496   int sig_index = component->generic_signature_index();
3497   if (sig_index > 0) {
3498     Symbol* sig = holder->constants()->symbol_at(sig_index); // sig_index is a utf8
3499     oop component_sig = StringTable::intern(sig, CHECK_NULL);
3500     java_lang_reflect_RecordComponent::set_signature(element(), component_sig);
3501   } else {
3502     java_lang_reflect_RecordComponent::set_signature(element(), nullptr);
3503   }
3504 
3505   typeArrayOop annotation_oop = Annotations::make_java_array(component->annotations(), CHECK_NULL);
3506   java_lang_reflect_RecordComponent::set_annotations(element(), annotation_oop);
3507 
3508   typeArrayOop type_annotation_oop = Annotations::make_java_array(component->type_annotations(), CHECK_NULL);
3509   java_lang_reflect_RecordComponent::set_typeAnnotations(element(), type_annotation_oop);
3510 
3511   return element();
3512 }
3513 
3514 int reflect_ConstantPool::_oop_offset;
3515 
3516 #define CONSTANTPOOL_FIELDS_DO(macro) \
3517   macro(_oop_offset, k, "constantPoolOop", object_signature, false)
3518 
3519 void reflect_ConstantPool::compute_offsets() {
3520   InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3521   // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
3522   CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3523 }
3524 
3525 #if INCLUDE_CDS
3526 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3527   CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3528 }
3529 #endif
3530 
3531 int java_lang_reflect_Parameter::_name_offset;
3532 int java_lang_reflect_Parameter::_modifiers_offset;
3533 int java_lang_reflect_Parameter::_index_offset;
3534 int java_lang_reflect_Parameter::_executable_offset;
3535 
3536 #define PARAMETER_FIELDS_DO(macro) \
3537   macro(_name_offset,        k, vmSymbols::name_name(),        string_signature, false); \
3538   macro(_modifiers_offset,   k, vmSymbols::modifiers_name(),   int_signature,    false); \
3539   macro(_index_offset,       k, vmSymbols::index_name(),       int_signature,    false); \
3540   macro(_executable_offset,  k, vmSymbols::executable_name(),  executable_signature, false)
3541 
3542 void java_lang_reflect_Parameter::compute_offsets() {
3543   InstanceKlass* k = vmClasses::reflect_Parameter_klass();
3544   PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3545 }
3546 
3547 #if INCLUDE_CDS
3548 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3549   PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3550 }
3551 #endif
3552 
3553 Handle java_lang_reflect_Parameter::create(TRAPS) {
3554   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3555   Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3556   Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3557   InstanceKlass* ik = InstanceKlass::cast(k);
3558   // Ensure it is initialized
3559   ik->initialize(CHECK_NH);
3560   return ik->allocate_instance_handle(THREAD);
3561 }
3562 
3563 oop java_lang_reflect_Parameter::name(oop param) {
3564   return param->obj_field(_name_offset);
3565 }
3566 
3567 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3568   param->obj_field_put(_name_offset, value);
3569 }
3570 
3571 int java_lang_reflect_Parameter::modifiers(oop param) {
3572   return param->int_field(_modifiers_offset);
3573 }
3574 
3575 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3576   param->int_field_put(_modifiers_offset, value);
3577 }
3578 
3579 int java_lang_reflect_Parameter::index(oop param) {
3580   return param->int_field(_index_offset);
3581 }
3582 
3583 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3584   param->int_field_put(_index_offset, value);
3585 }
3586 
3587 oop java_lang_reflect_Parameter::executable(oop param) {
3588   return param->obj_field(_executable_offset);
3589 }
3590 
3591 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3592   param->obj_field_put(_executable_offset, value);
3593 }
3594 
3595 // java_lang_Module
3596 
3597 int java_lang_Module::_loader_offset;
3598 int java_lang_Module::_name_offset;
3599 int java_lang_Module::_module_entry_offset;
3600 
3601 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3602   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3603   return JavaCalls::construct_new_instance(vmClasses::Module_klass(),
3604                           vmSymbols::java_lang_module_init_signature(),
3605                           loader, module_name, CHECK_NH);
3606 }
3607 
3608 #define MODULE_FIELDS_DO(macro) \
3609   macro(_loader_offset,  k, vmSymbols::loader_name(),  classloader_signature, false); \
3610   macro(_name_offset,    k, vmSymbols::name_name(),    string_signature,      false)
3611 
3612 void java_lang_Module::compute_offsets() {
3613   InstanceKlass* k = vmClasses::Module_klass();
3614   MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3615   MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3616 }
3617 
3618 #if INCLUDE_CDS
3619 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3620   MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3621   MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3622 }
3623 #endif
3624 
3625 oop java_lang_Module::loader(oop module) {
3626   return module->obj_field(_loader_offset);
3627 }
3628 
3629 void java_lang_Module::set_loader(oop module, oop value) {
3630   module->obj_field_put(_loader_offset, value);
3631 }
3632 
3633 oop java_lang_Module::name(oop module) {
3634   return module->obj_field(_name_offset);
3635 }
3636 
3637 void java_lang_Module::set_name(oop module, oop value) {
3638   module->obj_field_put(_name_offset, value);
3639 }
3640 
3641 ModuleEntry* java_lang_Module::module_entry_raw(oop module) {
3642   assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3643   assert(module != nullptr, "module can't be null");
3644   assert(oopDesc::is_oop(module), "module must be oop");
3645 
3646   ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3647   return module_entry;
3648 }
3649 
3650 ModuleEntry* java_lang_Module::module_entry(oop module) {
3651   ModuleEntry* module_entry = module_entry_raw(module);
3652   if (module_entry == nullptr) {
3653     // If the inject field containing the ModuleEntry* is null then return the
3654     // class loader's unnamed module.
3655     oop loader = java_lang_Module::loader(module);
3656     Handle h_loader = Handle(Thread::current(), loader);
3657     ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3658     return loader_cld->unnamed_module();
3659   }
3660   return module_entry;
3661 }
3662 
3663 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3664   assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3665   assert(module != nullptr, "module can't be null");
3666   assert(oopDesc::is_oop(module), "module must be oop");
3667   module->address_field_put(_module_entry_offset, (address)module_entry);
3668 }
3669 
3670 Handle reflect_ConstantPool::create(TRAPS) {
3671   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3672   InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3673   // Ensure it is initialized
3674   k->initialize(CHECK_NH);
3675   return k->allocate_instance_handle(THREAD);
3676 }
3677 
3678 
3679 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3680   oop mirror = value->pool_holder()->java_mirror();
3681   // Save the mirror to get back the constant pool.
3682   reflect->obj_field_put(_oop_offset, mirror);
3683 }
3684 
3685 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3686 
3687   oop mirror = reflect->obj_field(_oop_offset);
3688   Klass* k = java_lang_Class::as_Klass(mirror);
3689   assert(k->is_instance_klass(), "Must be");
3690 
3691   // Get the constant pool back from the klass.  Since class redefinition
3692   // merges the new constant pool into the old, this is essentially the
3693   // same constant pool as the original.  If constant pool merging is
3694   // no longer done in the future, this will have to change to save
3695   // the original.
3696   return InstanceKlass::cast(k)->constants();
3697 }
3698 
3699 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
3700 
3701 #define UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(macro) \
3702   macro(_base_offset, k, "base", object_signature, false)
3703 
3704 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
3705   InstanceKlass* k = vmClasses::reflect_UnsafeStaticFieldAccessorImpl_klass();
3706   UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3707 }
3708 
3709 #if INCLUDE_CDS
3710 void reflect_UnsafeStaticFieldAccessorImpl::serialize_offsets(SerializeClosure* f) {
3711   UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3712 }
3713 #endif
3714 
3715 // Support for java_lang_ref_Reference
3716 
3717 bool java_lang_ref_Reference::_offsets_initialized;
3718 
3719 int java_lang_ref_Reference::_referent_offset;
3720 int java_lang_ref_Reference::_queue_offset;
3721 int java_lang_ref_Reference::_next_offset;
3722 int java_lang_ref_Reference::_discovered_offset;
3723 
3724 #define REFERENCE_FIELDS_DO(macro) \
3725   macro(_referent_offset,   k, "referent", object_signature, false); \
3726   macro(_queue_offset,      k, "queue", referencequeue_signature, false); \
3727   macro(_next_offset,       k, "next", reference_signature, false); \
3728   macro(_discovered_offset, k, "discovered", reference_signature, false);
3729 
3730 void java_lang_ref_Reference::compute_offsets() {
3731   if (_offsets_initialized) {
3732     return;
3733   }
3734   _offsets_initialized = true;
3735   InstanceKlass* k = vmClasses::Reference_klass();
3736   REFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3737 }
3738 
3739 #if INCLUDE_CDS
3740 void java_lang_ref_Reference::serialize_offsets(SerializeClosure* f) {
3741   f->do_bool(&_offsets_initialized);
3742   REFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3743 }
3744 #endif
3745 
3746 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
3747   assert(obj != nullptr, "sanity");
3748   if (offset != _referent_offset) {
3749     return false;
3750   }
3751 
3752   Klass* k = obj->klass();
3753   if (!k->is_instance_klass()) {
3754     return false;
3755   }
3756 
3757   InstanceKlass* ik = InstanceKlass::cast(obj->klass());
3758   bool is_reference = ik->reference_type() != REF_NONE;
3759   assert(!is_reference || ik->is_subclass_of(vmClasses::Reference_klass()), "sanity");
3760   return is_reference;
3761 }
3762 
3763 int java_lang_boxing_object::_value_offset;
3764 int java_lang_boxing_object::_long_value_offset;
3765 
3766 #define BOXING_FIELDS_DO(macro) \
3767   macro(_value_offset,      integerKlass, "value", int_signature, false); \
3768   macro(_long_value_offset, longKlass, "value", long_signature, false);
3769 
3770 void java_lang_boxing_object::compute_offsets() {
3771   InstanceKlass* integerKlass = vmClasses::Integer_klass();
3772   InstanceKlass* longKlass = vmClasses::Long_klass();
3773   BOXING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3774 }
3775 
3776 #if INCLUDE_CDS
3777 void java_lang_boxing_object::serialize_offsets(SerializeClosure* f) {
3778   BOXING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3779 }
3780 #endif
3781 
3782 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
3783   Klass* k = vmClasses::box_klass(type);
3784   if (k == nullptr)  return nullptr;
3785   InstanceKlass* ik = InstanceKlass::cast(k);
3786   if (!ik->is_initialized()) {
3787     ik->initialize(CHECK_NULL);
3788   }
3789   return ik->allocate_instance(THREAD);
3790 }
3791 
3792 
3793 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
3794   oop box = initialize_and_allocate(type, CHECK_NULL);
3795   if (box == nullptr)  return nullptr;
3796   switch (type) {
3797     case T_BOOLEAN:
3798       box->bool_field_put(_value_offset, value->z);
3799       break;
3800     case T_CHAR:
3801       box->char_field_put(_value_offset, value->c);
3802       break;
3803     case T_FLOAT:
3804       box->float_field_put(_value_offset, value->f);
3805       break;
3806     case T_DOUBLE:
3807       box->double_field_put(_long_value_offset, value->d);
3808       break;
3809     case T_BYTE:
3810       box->byte_field_put(_value_offset, value->b);
3811       break;
3812     case T_SHORT:
3813       box->short_field_put(_value_offset, value->s);
3814       break;
3815     case T_INT:
3816       box->int_field_put(_value_offset, value->i);
3817       break;
3818     case T_LONG:
3819       box->long_field_put(_long_value_offset, value->j);
3820       break;
3821     default:
3822       return nullptr;
3823   }
3824   return box;
3825 }
3826 
3827 
3828 BasicType java_lang_boxing_object::basic_type(oop box) {
3829   if (box == nullptr)  return T_ILLEGAL;
3830   BasicType type = vmClasses::box_klass_type(box->klass());
3831   if (type == T_OBJECT)         // 'unknown' value returned by SD::bkt
3832     return T_ILLEGAL;
3833   return type;
3834 }
3835 
3836 
3837 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
3838   BasicType type = vmClasses::box_klass_type(box->klass());
3839   switch (type) {
3840   case T_BOOLEAN:
3841     value->z = box->bool_field(_value_offset);
3842     break;
3843   case T_CHAR:
3844     value->c = box->char_field(_value_offset);
3845     break;
3846   case T_FLOAT:
3847     value->f = box->float_field(_value_offset);
3848     break;
3849   case T_DOUBLE:
3850     value->d = box->double_field(_long_value_offset);
3851     break;
3852   case T_BYTE:
3853     value->b = box->byte_field(_value_offset);
3854     break;
3855   case T_SHORT:
3856     value->s = box->short_field(_value_offset);
3857     break;
3858   case T_INT:
3859     value->i = box->int_field(_value_offset);
3860     break;
3861   case T_LONG:
3862     value->j = box->long_field(_long_value_offset);
3863     break;
3864   default:
3865     return T_ILLEGAL;
3866   } // end switch
3867   return type;
3868 }
3869 
3870 
3871 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
3872   BasicType type = vmClasses::box_klass_type(box->klass());
3873   switch (type) {
3874   case T_BOOLEAN:
3875     box->bool_field_put(_value_offset, value->z);
3876     break;
3877   case T_CHAR:
3878     box->char_field_put(_value_offset, value->c);
3879     break;
3880   case T_FLOAT:
3881     box->float_field_put(_value_offset, value->f);
3882     break;
3883   case T_DOUBLE:
3884     box->double_field_put(_long_value_offset, value->d);
3885     break;
3886   case T_BYTE:
3887     box->byte_field_put(_value_offset, value->b);
3888     break;
3889   case T_SHORT:
3890     box->short_field_put(_value_offset, value->s);
3891     break;
3892   case T_INT:
3893     box->int_field_put(_value_offset, value->i);
3894     break;
3895   case T_LONG:
3896     box->long_field_put(_long_value_offset, value->j);
3897     break;
3898   default:
3899     return T_ILLEGAL;
3900   } // end switch
3901   return type;
3902 }
3903 
3904 
3905 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
3906   switch (type) {
3907   case T_BOOLEAN:   st->print("%s", value->z ? "true" : "false");   break;
3908   case T_CHAR:      st->print("%d", value->c);                      break;
3909   case T_BYTE:      st->print("%d", value->b);                      break;
3910   case T_SHORT:     st->print("%d", value->s);                      break;
3911   case T_INT:       st->print("%d", value->i);                      break;
3912   case T_LONG:      st->print(JLONG_FORMAT, value->j);              break;
3913   case T_FLOAT:     st->print("%f", value->f);                      break;
3914   case T_DOUBLE:    st->print("%lf", value->d);                     break;
3915   default:          st->print("type %d?", type);                    break;
3916   }
3917 }
3918 
3919 
3920 // Support for java_lang_ref_SoftReference
3921 //
3922 
3923 int java_lang_ref_SoftReference::_timestamp_offset;
3924 int java_lang_ref_SoftReference::_static_clock_offset;
3925 
3926 #define SOFTREFERENCE_FIELDS_DO(macro) \
3927   macro(_timestamp_offset,    k, "timestamp", long_signature, false); \
3928   macro(_static_clock_offset, k, "clock",     long_signature, true)
3929 
3930 void java_lang_ref_SoftReference::compute_offsets() {
3931   InstanceKlass* k = vmClasses::SoftReference_klass();
3932   SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3933 }
3934 
3935 #if INCLUDE_CDS
3936 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
3937   SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3938 }
3939 #endif
3940 
3941 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
3942   return ref->long_field(_timestamp_offset);
3943 }
3944 
3945 jlong java_lang_ref_SoftReference::clock() {
3946   InstanceKlass* ik = vmClasses::SoftReference_klass();
3947   oop base = ik->static_field_base_raw();
3948   return base->long_field(_static_clock_offset);
3949 }
3950 
3951 void java_lang_ref_SoftReference::set_clock(jlong value) {
3952   InstanceKlass* ik = vmClasses::SoftReference_klass();
3953   oop base = ik->static_field_base_raw();
3954   base->long_field_put(_static_clock_offset, value);
3955 }
3956 
3957 // Support for java_lang_invoke_DirectMethodHandle
3958 
3959 int java_lang_invoke_DirectMethodHandle::_member_offset;
3960 
3961 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
3962   oop member_name = nullptr;
3963   assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
3964          "a DirectMethodHandle oop is expected");
3965   return dmh->obj_field(_member_offset);
3966 }
3967 
3968 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
3969   macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
3970 
3971 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
3972   InstanceKlass* k = vmClasses::DirectMethodHandle_klass();
3973   DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3974 }
3975 
3976 #if INCLUDE_CDS
3977 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
3978   DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3979 }
3980 #endif
3981 
3982 // Support for java_lang_invoke_MethodHandle
3983 
3984 int java_lang_invoke_MethodHandle::_type_offset;
3985 int java_lang_invoke_MethodHandle::_form_offset;
3986 
3987 int java_lang_invoke_MemberName::_clazz_offset;
3988 int java_lang_invoke_MemberName::_name_offset;
3989 int java_lang_invoke_MemberName::_type_offset;
3990 int java_lang_invoke_MemberName::_flags_offset;
3991 int java_lang_invoke_MemberName::_method_offset;
3992 int java_lang_invoke_MemberName::_vmindex_offset;
3993 
3994 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
3995 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
3996 
3997 int java_lang_invoke_LambdaForm::_vmentry_offset;
3998 
3999 #define METHODHANDLE_FIELDS_DO(macro) \
4000   macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
4001   macro(_form_offset, k, "form",                 java_lang_invoke_LambdaForm_signature, false)
4002 
4003 void java_lang_invoke_MethodHandle::compute_offsets() {
4004   InstanceKlass* k = vmClasses::MethodHandle_klass();
4005   METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4006 }
4007 
4008 #if INCLUDE_CDS
4009 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
4010   METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4011 }
4012 #endif
4013 
4014 #define MEMBERNAME_FIELDS_DO(macro) \
4015   macro(_clazz_offset,   k, vmSymbols::clazz_name(),   class_signature,  false); \
4016   macro(_name_offset,    k, vmSymbols::name_name(),    string_signature, false); \
4017   macro(_type_offset,    k, vmSymbols::type_name(),    object_signature, false); \
4018   macro(_flags_offset,   k, vmSymbols::flags_name(),   int_signature,    false); \
4019   macro(_method_offset,  k, vmSymbols::method_name(),  java_lang_invoke_ResolvedMethodName_signature, false)
4020 
4021 void java_lang_invoke_MemberName::compute_offsets() {
4022   InstanceKlass* k = vmClasses::MemberName_klass();
4023   MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4024   MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4025 }
4026 
4027 #if INCLUDE_CDS
4028 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
4029   MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4030   MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4031 }
4032 #endif
4033 
4034 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
4035   InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4036   assert(k != nullptr, "jdk mismatch");
4037   RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4038 }
4039 
4040 #if INCLUDE_CDS
4041 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
4042   RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4043 }
4044 #endif
4045 
4046 #define LAMBDAFORM_FIELDS_DO(macro) \
4047   macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
4048 
4049 void java_lang_invoke_LambdaForm::compute_offsets() {
4050   InstanceKlass* k = vmClasses::LambdaForm_klass();
4051   assert (k != nullptr, "jdk mismatch");
4052   LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4053 }
4054 
4055 #if INCLUDE_CDS
4056 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
4057   LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4058 }
4059 #endif
4060 
4061 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
4062   return obj != nullptr && is_subclass(obj->klass());
4063 }
4064 
4065 int jdk_internal_foreign_abi_NativeEntryPoint::_method_type_offset;
4066 int jdk_internal_foreign_abi_NativeEntryPoint::_downcall_stub_address_offset;
4067 
4068 #define NEP_FIELDS_DO(macro) \
4069   macro(_method_type_offset,           k, "methodType",          java_lang_invoke_MethodType_signature, false); \
4070   macro(_downcall_stub_address_offset, k, "downcallStubAddress", long_signature, false);
4071 
4072 bool jdk_internal_foreign_abi_NativeEntryPoint::is_instance(oop obj) {
4073   return obj != nullptr && is_subclass(obj->klass());
4074 }
4075 
4076 void jdk_internal_foreign_abi_NativeEntryPoint::compute_offsets() {
4077   InstanceKlass* k = vmClasses::NativeEntryPoint_klass();
4078   NEP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4079 }
4080 
4081 #if INCLUDE_CDS
4082 void jdk_internal_foreign_abi_NativeEntryPoint::serialize_offsets(SerializeClosure* f) {
4083   NEP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4084 }
4085 #endif
4086 
4087 oop jdk_internal_foreign_abi_NativeEntryPoint::method_type(oop entry) {
4088   return entry->obj_field(_method_type_offset);
4089 }
4090 
4091 jlong jdk_internal_foreign_abi_NativeEntryPoint::downcall_stub_address(oop entry) {
4092   return entry->long_field(_downcall_stub_address_offset);
4093 }
4094 
4095 int jdk_internal_foreign_abi_ABIDescriptor::_inputStorage_offset;
4096 int jdk_internal_foreign_abi_ABIDescriptor::_outputStorage_offset;
4097 int jdk_internal_foreign_abi_ABIDescriptor::_volatileStorage_offset;
4098 int jdk_internal_foreign_abi_ABIDescriptor::_stackAlignment_offset;
4099 int jdk_internal_foreign_abi_ABIDescriptor::_shadowSpace_offset;
4100 int jdk_internal_foreign_abi_ABIDescriptor::_scratch1_offset;
4101 int jdk_internal_foreign_abi_ABIDescriptor::_scratch2_offset;
4102 
4103 #define ABIDescriptor_FIELDS_DO(macro) \
4104   macro(_inputStorage_offset,    k, "inputStorage",    jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4105   macro(_outputStorage_offset,   k, "outputStorage",   jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4106   macro(_volatileStorage_offset, k, "volatileStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4107   macro(_stackAlignment_offset,  k, "stackAlignment",  int_signature, false); \
4108   macro(_shadowSpace_offset,     k, "shadowSpace",     int_signature, false); \
4109   macro(_scratch1_offset,        k, "scratch1",        jdk_internal_foreign_abi_VMStorage_signature, false); \
4110   macro(_scratch2_offset,        k, "scratch2",        jdk_internal_foreign_abi_VMStorage_signature, false);
4111 
4112 bool jdk_internal_foreign_abi_ABIDescriptor::is_instance(oop obj) {
4113   return obj != nullptr && is_subclass(obj->klass());
4114 }
4115 
4116 void jdk_internal_foreign_abi_ABIDescriptor::compute_offsets() {
4117   InstanceKlass* k = vmClasses::ABIDescriptor_klass();
4118   ABIDescriptor_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4119 }
4120 
4121 #if INCLUDE_CDS
4122 void jdk_internal_foreign_abi_ABIDescriptor::serialize_offsets(SerializeClosure* f) {
4123   ABIDescriptor_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4124 }
4125 #endif
4126 
4127 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::inputStorage(oop entry) {
4128   return oop_cast<objArrayOop>(entry->obj_field(_inputStorage_offset));
4129 }
4130 
4131 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::outputStorage(oop entry) {
4132   return oop_cast<objArrayOop>(entry->obj_field(_outputStorage_offset));
4133 }
4134 
4135 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::volatileStorage(oop entry) {
4136   return oop_cast<objArrayOop>(entry->obj_field(_volatileStorage_offset));
4137 }
4138 
4139 jint jdk_internal_foreign_abi_ABIDescriptor::stackAlignment(oop entry) {
4140   return entry->int_field(_stackAlignment_offset);
4141 }
4142 
4143 jint jdk_internal_foreign_abi_ABIDescriptor::shadowSpace(oop entry) {
4144   return entry->int_field(_shadowSpace_offset);
4145 }
4146 
4147 oop jdk_internal_foreign_abi_ABIDescriptor::scratch1(oop entry) {
4148   return entry->obj_field(_scratch1_offset);
4149 }
4150 
4151 oop jdk_internal_foreign_abi_ABIDescriptor::scratch2(oop entry) {
4152   return entry->obj_field(_scratch2_offset);
4153 }
4154 
4155 int jdk_internal_foreign_abi_VMStorage::_type_offset;
4156 int jdk_internal_foreign_abi_VMStorage::_indexOrOffset_offset;
4157 int jdk_internal_foreign_abi_VMStorage::_segmentMaskOrSize_offset;
4158 int jdk_internal_foreign_abi_VMStorage::_debugName_offset;
4159 
4160 #define VMStorage_FIELDS_DO(macro) \
4161   macro(_type_offset,              k, "type",              byte_signature, false); \
4162   macro(_indexOrOffset_offset,     k, "indexOrOffset",     int_signature, false); \
4163   macro(_segmentMaskOrSize_offset, k, "segmentMaskOrSize", short_signature, false); \
4164   macro(_debugName_offset,         k, "debugName",         string_signature, false); \
4165 
4166 bool jdk_internal_foreign_abi_VMStorage::is_instance(oop obj) {
4167   return obj != nullptr && is_subclass(obj->klass());
4168 }
4169 
4170 void jdk_internal_foreign_abi_VMStorage::compute_offsets() {
4171   InstanceKlass* k = vmClasses::VMStorage_klass();
4172   VMStorage_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4173 }
4174 
4175 #if INCLUDE_CDS
4176 void jdk_internal_foreign_abi_VMStorage::serialize_offsets(SerializeClosure* f) {
4177   VMStorage_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4178 }
4179 #endif
4180 
4181 jbyte jdk_internal_foreign_abi_VMStorage::type(oop entry) {
4182   return entry->byte_field(_type_offset);
4183 }
4184 
4185 jint jdk_internal_foreign_abi_VMStorage::index_or_offset(oop entry) {
4186   return entry->int_field(_indexOrOffset_offset);
4187 }
4188 
4189 jshort jdk_internal_foreign_abi_VMStorage::segment_mask_or_size(oop entry) {
4190   return entry->short_field(_segmentMaskOrSize_offset);
4191 }
4192 
4193 oop jdk_internal_foreign_abi_VMStorage::debugName(oop entry) {
4194   return entry->obj_field(_debugName_offset);
4195 }
4196 
4197 int jdk_internal_foreign_abi_CallConv::_argRegs_offset;
4198 int jdk_internal_foreign_abi_CallConv::_retRegs_offset;
4199 
4200 #define CallConv_FIELDS_DO(macro) \
4201   macro(_argRegs_offset, k, "argRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4202   macro(_retRegs_offset, k, "retRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4203 
4204 bool jdk_internal_foreign_abi_CallConv::is_instance(oop obj) {
4205   return obj != nullptr && is_subclass(obj->klass());
4206 }
4207 
4208 void jdk_internal_foreign_abi_CallConv::compute_offsets() {
4209   InstanceKlass* k = vmClasses::CallConv_klass();
4210   CallConv_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4211 }
4212 
4213 #if INCLUDE_CDS
4214 void jdk_internal_foreign_abi_CallConv::serialize_offsets(SerializeClosure* f) {
4215   CallConv_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4216 }
4217 #endif
4218 
4219 objArrayOop jdk_internal_foreign_abi_CallConv::argRegs(oop entry) {
4220   return oop_cast<objArrayOop>(entry->obj_field(_argRegs_offset));
4221 }
4222 
4223 objArrayOop jdk_internal_foreign_abi_CallConv::retRegs(oop entry) {
4224   return oop_cast<objArrayOop>(entry->obj_field(_retRegs_offset));
4225 }
4226 
4227 oop java_lang_invoke_MethodHandle::type(oop mh) {
4228   return mh->obj_field(_type_offset);
4229 }
4230 
4231 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
4232   mh->obj_field_put(_type_offset, mtype);
4233 }
4234 
4235 oop java_lang_invoke_MethodHandle::form(oop mh) {
4236   assert(_form_offset != 0, "");
4237   return mh->obj_field(_form_offset);
4238 }
4239 
4240 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
4241   assert(_form_offset != 0, "");
4242   mh->obj_field_put(_form_offset, lform);
4243 }
4244 
4245 /// MemberName accessors
4246 
4247 oop java_lang_invoke_MemberName::clazz(oop mname) {
4248   assert(is_instance(mname), "wrong type");
4249   return mname->obj_field(_clazz_offset);
4250 }
4251 
4252 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
4253   assert(is_instance(mname), "wrong type");
4254   mname->obj_field_put(_clazz_offset, clazz);
4255 }
4256 
4257 oop java_lang_invoke_MemberName::name(oop mname) {
4258   assert(is_instance(mname), "wrong type");
4259   return mname->obj_field(_name_offset);
4260 }
4261 
4262 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
4263   assert(is_instance(mname), "wrong type");
4264   mname->obj_field_put(_name_offset, name);
4265 }
4266 
4267 oop java_lang_invoke_MemberName::type(oop mname) {
4268   assert(is_instance(mname), "wrong type");
4269   return mname->obj_field(_type_offset);
4270 }
4271 
4272 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
4273   assert(is_instance(mname), "wrong type");
4274   mname->obj_field_put(_type_offset, type);
4275 }
4276 
4277 int java_lang_invoke_MemberName::flags(oop mname) {
4278   assert(is_instance(mname), "wrong type");
4279   return mname->int_field(_flags_offset);
4280 }
4281 
4282 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
4283   assert(is_instance(mname), "wrong type");
4284   mname->int_field_put(_flags_offset, flags);
4285 }
4286 
4287 
4288 // Return vmtarget from ResolvedMethodName method field through indirection
4289 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
4290   assert(is_instance(mname), "wrong type");
4291   oop method = mname->obj_field(_method_offset);
4292   return method == nullptr ? nullptr : java_lang_invoke_ResolvedMethodName::vmtarget(method);
4293 }
4294 
4295 bool java_lang_invoke_MemberName::is_method(oop mname) {
4296   assert(is_instance(mname), "must be MemberName");
4297   return (flags(mname) & (MN_IS_METHOD | MN_IS_OBJECT_CONSTRUCTOR)) > 0;
4298 }
4299 
4300 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
4301   assert(is_instance(mname), "wrong type");
4302   mname->obj_field_put(_method_offset, resolved_method);
4303 }
4304 
4305 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
4306   assert(is_instance(mname), "wrong type");
4307   return (intptr_t) mname->address_field(_vmindex_offset);
4308 }
4309 
4310 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
4311   assert(is_instance(mname), "wrong type");
4312   mname->address_field_put(_vmindex_offset, (address) index);
4313 }
4314 
4315 
4316 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
4317   assert(is_instance(resolved_method), "wrong type");
4318   Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
4319   assert(m->is_method(), "must be");
4320   return m;
4321 }
4322 
4323 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
4324 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
4325   assert(is_instance(resolved_method), "wrong type");
4326   resolved_method->address_field_put(_vmtarget_offset, (address)m);
4327 }
4328 
4329 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) {
4330   assert(is_instance(resolved_method), "wrong type");
4331   resolved_method->obj_field_put(_vmholder_offset, holder);
4332 }
4333 
4334 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
4335   const Method* method = m();
4336 
4337   // lookup ResolvedMethod oop in the table, or create a new one and intern it
4338   oop resolved_method = ResolvedMethodTable::find_method(method);
4339   if (resolved_method != nullptr) {
4340     return resolved_method;
4341   }
4342 
4343   InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4344   if (!k->is_initialized()) {
4345     k->initialize(CHECK_NULL);
4346   }
4347 
4348   oop new_resolved_method = k->allocate_instance(CHECK_NULL);
4349 
4350   NoSafepointVerifier nsv;
4351 
4352   if (method->is_old()) {
4353     method = (method->is_deleted()) ? Universe::throw_no_such_method_error() :
4354                                       method->get_new_method();
4355   }
4356 
4357   InstanceKlass* holder = method->method_holder();
4358 
4359   set_vmtarget(new_resolved_method, const_cast<Method*>(method));
4360   // Add a reference to the loader (actually mirror because hidden classes may not have
4361   // distinct loaders) to ensure the metadata is kept alive.
4362   // This mirror may be different than the one in clazz field.
4363   set_vmholder(new_resolved_method, holder->java_mirror());
4364 
4365   // Set flag in class to indicate this InstanceKlass has entries in the table
4366   // to avoid walking table during redefinition if none of the redefined classes
4367   // have any membernames in the table.
4368   holder->set_has_resolved_methods();
4369 
4370   return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method));
4371 }
4372 
4373 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
4374   assert(is_instance(lform), "wrong type");
4375   return lform->obj_field(_vmentry_offset);
4376 }
4377 
4378 
4379 // Support for java_lang_invoke_MethodType
4380 
4381 int java_lang_invoke_MethodType::_rtype_offset;
4382 int java_lang_invoke_MethodType::_ptypes_offset;
4383 
4384 #define METHODTYPE_FIELDS_DO(macro) \
4385   macro(_rtype_offset,  k, "rtype",  class_signature,       false); \
4386   macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
4387 
4388 void java_lang_invoke_MethodType::compute_offsets() {
4389   InstanceKlass* k = vmClasses::MethodType_klass();
4390   METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4391 }
4392 
4393 #if INCLUDE_CDS
4394 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
4395   METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4396 }
4397 #endif
4398 
4399 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
4400   st->print("(");
4401   objArrayOop pts = ptypes(mt);
4402   if (pts != nullptr) {
4403     for (int i = 0, limit = pts->length(); i < limit; i++) {
4404       java_lang_Class::print_signature(pts->obj_at(i), st);
4405     }
4406   } else {
4407     st->print("null");
4408   }
4409   st->print(")");
4410   oop rt = rtype(mt);
4411   if (rt != nullptr) {
4412     java_lang_Class::print_signature(rt, st);
4413   } else {
4414     st->print("null");
4415   }
4416 }
4417 
4418 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) {
4419   ResourceMark rm;
4420   stringStream buffer(128);
4421   print_signature(mt, &buffer);
4422   const char* sigstr =       buffer.base();
4423   int         siglen = (int) buffer.size();
4424   Symbol *name;
4425   if (!intern_if_not_found) {
4426     name = SymbolTable::probe(sigstr, siglen);
4427   } else {
4428     name = SymbolTable::new_symbol(sigstr, siglen);
4429   }
4430   return name;
4431 }
4432 
4433 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
4434   if (mt1 == mt2)
4435     return true;
4436   if (rtype(mt1) != rtype(mt2))
4437     return false;
4438   if (ptype_count(mt1) != ptype_count(mt2))
4439     return false;
4440   for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
4441     if (ptype(mt1, i) != ptype(mt2, i))
4442       return false;
4443   }
4444   return true;
4445 }
4446 
4447 oop java_lang_invoke_MethodType::rtype(oop mt) {
4448   assert(is_instance(mt), "must be a MethodType");
4449   return mt->obj_field(_rtype_offset);
4450 }
4451 
4452 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
4453   assert(is_instance(mt), "must be a MethodType");
4454   return (objArrayOop) mt->obj_field(_ptypes_offset);
4455 }
4456 
4457 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
4458   return ptypes(mt)->obj_at(idx);
4459 }
4460 
4461 int java_lang_invoke_MethodType::ptype_count(oop mt) {
4462   return ptypes(mt)->length();
4463 }
4464 
4465 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
4466   objArrayOop pts = ptypes(mt);
4467   int count = pts->length();
4468   int slots = 0;
4469   for (int i = 0; i < count; i++) {
4470     BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
4471     slots += type2size[bt];
4472   }
4473   return slots;
4474 }
4475 
4476 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
4477   BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
4478   return type2size[bt];
4479 }
4480 
4481 
4482 // Support for java_lang_invoke_CallSite
4483 
4484 int java_lang_invoke_CallSite::_target_offset;
4485 int java_lang_invoke_CallSite::_context_offset;
4486 
4487 #define CALLSITE_FIELDS_DO(macro) \
4488   macro(_target_offset,  k, "target", java_lang_invoke_MethodHandle_signature, false); \
4489   macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false)
4490 
4491 void java_lang_invoke_CallSite::compute_offsets() {
4492   InstanceKlass* k = vmClasses::CallSite_klass();
4493   CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4494 }
4495 
4496 #if INCLUDE_CDS
4497 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
4498   CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4499 }
4500 #endif
4501 
4502 oop java_lang_invoke_CallSite::context_no_keepalive(oop call_site) {
4503   assert(java_lang_invoke_CallSite::is_instance(call_site), "");
4504 
4505   oop dep_oop = call_site->obj_field_access<AS_NO_KEEPALIVE>(_context_offset);
4506   return dep_oop;
4507 }
4508 
4509 // Support for java_lang_invoke_ConstantCallSite
4510 
4511 int java_lang_invoke_ConstantCallSite::_is_frozen_offset;
4512 
4513 #define CONSTANTCALLSITE_FIELDS_DO(macro) \
4514   macro(_is_frozen_offset, k, "isFrozen", bool_signature, false)
4515 
4516 void java_lang_invoke_ConstantCallSite::compute_offsets() {
4517   InstanceKlass* k = vmClasses::ConstantCallSite_klass();
4518   CONSTANTCALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4519 }
4520 
4521 #if INCLUDE_CDS
4522 void java_lang_invoke_ConstantCallSite::serialize_offsets(SerializeClosure* f) {
4523   CONSTANTCALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4524 }
4525 #endif
4526 
4527 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext
4528 
4529 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset;
4530 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_last_cleanup_offset;
4531 
4532 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() {
4533   InstanceKlass* k = vmClasses::Context_klass();
4534   CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4535 }
4536 
4537 #if INCLUDE_CDS
4538 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) {
4539   CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4540 }
4541 #endif
4542 
4543 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) {
4544   assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
4545   nmethodBucket* volatile* vmdeps_addr = call_site->field_addr<nmethodBucket* volatile>(_vmdependencies_offset);
4546   volatile uint64_t* last_cleanup_addr = call_site->field_addr<volatile uint64_t>(_last_cleanup_offset);
4547   DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr);
4548   return dep_ctx;
4549 }
4550 
4551 // Support for java_security_AccessControlContext
4552 
4553 int java_security_AccessControlContext::_context_offset;
4554 int java_security_AccessControlContext::_privilegedContext_offset;
4555 int java_security_AccessControlContext::_isPrivileged_offset;
4556 int java_security_AccessControlContext::_isAuthorized_offset;
4557 
4558 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \
4559   macro(_context_offset,           k, "context",      protectiondomain_signature, false); \
4560   macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \
4561   macro(_isPrivileged_offset,      k, "isPrivileged", bool_signature, false); \
4562   macro(_isAuthorized_offset,      k, "isAuthorized", bool_signature, false)
4563 
4564 void java_security_AccessControlContext::compute_offsets() {
4565   assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
4566   InstanceKlass* k = vmClasses::AccessControlContext_klass();
4567   ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4568 }
4569 
4570 #if INCLUDE_CDS
4571 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) {
4572   ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4573 }
4574 #endif
4575 
4576 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
4577   assert(_isPrivileged_offset != 0, "offsets should have been initialized");
4578   assert(_isAuthorized_offset != 0, "offsets should have been initialized");
4579   // Ensure klass is initialized
4580   vmClasses::AccessControlContext_klass()->initialize(CHECK_NULL);
4581   // Allocate result
4582   oop result = vmClasses::AccessControlContext_klass()->allocate_instance(CHECK_NULL);
4583   // Fill in values
4584   result->obj_field_put(_context_offset, context());
4585   result->obj_field_put(_privilegedContext_offset, privileged_context());
4586   result->bool_field_put(_isPrivileged_offset, isPrivileged);
4587   result->bool_field_put(_isAuthorized_offset, true);
4588   return result;
4589 }
4590 
4591 
4592 // Support for java_lang_ClassLoader
4593 
4594 int  java_lang_ClassLoader::_loader_data_offset;
4595 int  java_lang_ClassLoader::_parallelCapable_offset;
4596 int  java_lang_ClassLoader::_name_offset;
4597 int  java_lang_ClassLoader::_nameAndId_offset;
4598 int  java_lang_ClassLoader::_unnamedModule_offset;
4599 int  java_lang_ClassLoader::_parent_offset;
4600 
4601 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
4602   assert(loader != nullptr, "loader must not be null");
4603   assert(oopDesc::is_oop(loader), "loader must be oop");
4604   return Atomic::load_acquire(loader->field_addr<ClassLoaderData*>(_loader_data_offset));
4605 }
4606 
4607 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
4608   assert(loader != nullptr, "loader must not be null");
4609   assert(oopDesc::is_oop(loader), "loader must be oop");
4610   return *loader->field_addr<ClassLoaderData*>(_loader_data_offset);
4611 }
4612 
4613 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
4614   assert(loader != nullptr, "loader must not be null");
4615   assert(oopDesc::is_oop(loader), "loader must be oop");
4616   Atomic::release_store(loader->field_addr<ClassLoaderData*>(_loader_data_offset), new_data);
4617 }
4618 
4619 #define CLASSLOADER_FIELDS_DO(macro) \
4620   macro(_parallelCapable_offset, k1, "parallelLockMap",      concurrenthashmap_signature, false); \
4621   macro(_name_offset,            k1, vmSymbols::name_name(), string_signature, false); \
4622   macro(_nameAndId_offset,       k1, "nameAndId",            string_signature, false); \
4623   macro(_unnamedModule_offset,   k1, "unnamedModule",        module_signature, false); \
4624   macro(_parent_offset,          k1, "parent",               classloader_signature, false)
4625 
4626 void java_lang_ClassLoader::compute_offsets() {
4627   InstanceKlass* k1 = vmClasses::ClassLoader_klass();
4628   CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4629 
4630   CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4631 }
4632 
4633 #if INCLUDE_CDS
4634 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
4635   CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4636   CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4637 }
4638 #endif
4639 
4640 oop java_lang_ClassLoader::parent(oop loader) {
4641   assert(is_instance(loader), "loader must be oop");
4642   return loader->obj_field(_parent_offset);
4643 }
4644 
4645 oop java_lang_ClassLoader::parent_no_keepalive(oop loader) {
4646   assert(is_instance(loader), "loader must be oop");
4647   return loader->obj_field_access<AS_NO_KEEPALIVE>(_parent_offset);
4648 }
4649 
4650 // Returns the name field of this class loader.  If the name field has not
4651 // been set, null will be returned.
4652 oop java_lang_ClassLoader::name(oop loader) {
4653   assert(is_instance(loader), "loader must be oop");
4654   return loader->obj_field(_name_offset);
4655 }
4656 
4657 // Returns the nameAndId field of this class loader. The format is
4658 // as follows:
4659 //   If the defining loader has a name explicitly set then '<loader-name>' @<id>
4660 //   If the defining loader has no name then <qualified-class-name> @<id>
4661 //   If built-in loader, then omit '@<id>' as there is only one instance.
4662 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
4663 oop java_lang_ClassLoader::nameAndId(oop loader) {
4664   assert(is_instance(loader), "loader must be oop");
4665   return loader->obj_field(_nameAndId_offset);
4666 }
4667 
4668 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
4669   assert(is_instance(loader), "loader must be oop");
4670   assert(cl == nullptr || is_instance(cl), "cl argument must be oop");
4671   oop acl = loader;
4672   debug_only(jint loop_count = 0);
4673   // This loop taken verbatim from ClassLoader.java:
4674   do {
4675     acl = parent(acl);
4676     if (cl == acl) {
4677       return true;
4678     }
4679     assert(++loop_count > 0, "loop_count overflow");
4680   } while (acl != nullptr);
4681   return false;
4682 }
4683 
4684 bool java_lang_ClassLoader::is_instance(oop obj) {
4685   return obj != nullptr && is_subclass(obj->klass());
4686 }
4687 
4688 
4689 // For class loader classes, parallelCapable defined
4690 // based on non-null field
4691 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
4692 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
4693   assert(_parallelCapable_offset != 0, "offsets should have been initialized");
4694   return (class_loader->obj_field(_parallelCapable_offset) != nullptr);
4695 }
4696 
4697 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
4698   // Fix for 4474172; see evaluation for more details
4699   loader = non_reflection_class_loader(loader);
4700 
4701   oop cl = SystemDictionary::java_system_loader();
4702   while(cl != nullptr) {
4703     if (cl == loader) return true;
4704     cl = parent(cl);
4705   }
4706   return false;
4707 }
4708 
4709 // Return true if this is one of the class loaders associated with
4710 // the generated bytecodes for reflection.
4711 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) {
4712   if (loader != nullptr) {
4713     Klass* delegating_cl_class = vmClasses::reflect_DelegatingClassLoader_klass();
4714     // This might be null in non-1.4 JDKs
4715     return (delegating_cl_class != nullptr && loader->is_a(delegating_cl_class));
4716   }
4717   return false;
4718 }
4719 
4720 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
4721   // See whether this is one of the class loaders associated with
4722   // the generated bytecodes for reflection, and if so, "magically"
4723   // delegate to its parent to prevent class loading from occurring
4724   // in places where applications using reflection didn't expect it.
4725   if (is_reflection_class_loader(loader)) {
4726     return parent(loader);
4727   }
4728   return loader;
4729 }
4730 
4731 oop java_lang_ClassLoader::unnamedModule(oop loader) {
4732   assert(is_instance(loader), "loader must be oop");
4733   return loader->obj_field(_unnamedModule_offset);
4734 }
4735 
4736 // Support for java_lang_System
4737 //
4738 
4739 int java_lang_System::_static_in_offset;
4740 int java_lang_System::_static_out_offset;
4741 int java_lang_System::_static_err_offset;
4742 int java_lang_System::_static_security_offset;
4743 int java_lang_System::_static_allow_security_offset;
4744 int java_lang_System::_static_never_offset;
4745 
4746 #define SYSTEM_FIELDS_DO(macro) \
4747   macro(_static_in_offset,  k, "in",  input_stream_signature, true); \
4748   macro(_static_out_offset, k, "out", print_stream_signature, true); \
4749   macro(_static_err_offset, k, "err", print_stream_signature, true); \
4750   macro(_static_security_offset, k, "security", security_manager_signature, true); \
4751   macro(_static_allow_security_offset, k, "allowSecurityManager", int_signature, true); \
4752   macro(_static_never_offset, k, "NEVER", int_signature, true)
4753 
4754 void java_lang_System::compute_offsets() {
4755   InstanceKlass* k = vmClasses::System_klass();
4756   SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4757 }
4758 
4759 // This field tells us that a security manager can never be installed so we
4760 // can completely skip populating the ProtectionDomainCacheTable.
4761 bool java_lang_System::allow_security_manager() {
4762   static int initialized = false;
4763   static bool allowed = true; // default
4764   if (!initialized) {
4765     oop base = vmClasses::System_klass()->static_field_base_raw();
4766     int never = base->int_field(_static_never_offset);
4767     allowed = (base->int_field(_static_allow_security_offset) != never);
4768     initialized = true;
4769   }
4770   return allowed;
4771 }
4772 
4773 // This field tells us that a security manager is installed.
4774 bool java_lang_System::has_security_manager() {
4775   oop base = vmClasses::System_klass()->static_field_base_raw();
4776   return base->obj_field(_static_security_offset) != nullptr;
4777 }
4778 
4779 #if INCLUDE_CDS
4780 void java_lang_System::serialize_offsets(SerializeClosure* f) {
4781    SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4782 }
4783 #endif
4784 
4785 // Support for jdk_internal_misc_UnsafeConstants
4786 //
4787 class UnsafeConstantsFixup : public FieldClosure {
4788 private:
4789   int _address_size;
4790   int _page_size;
4791   bool _big_endian;
4792   bool _use_unaligned_access;
4793   int _data_cache_line_flush_size;
4794 public:
4795   UnsafeConstantsFixup() {
4796     // round up values for all static final fields
4797     _address_size = sizeof(void*);
4798     _page_size = (int)os::vm_page_size();
4799     _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true);
4800     _use_unaligned_access = UseUnalignedAccesses;
4801     _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size();
4802   }
4803 
4804   void do_field(fieldDescriptor* fd) {
4805     oop mirror = fd->field_holder()->java_mirror();
4806     assert(mirror != nullptr, "UnsafeConstants must have mirror already");
4807     assert(fd->field_holder() == vmClasses::UnsafeConstants_klass(), "Should be UnsafeConstants");
4808     assert(fd->is_final(), "fields of UnsafeConstants must be final");
4809     assert(fd->is_static(), "fields of UnsafeConstants must be static");
4810     if (fd->name() == vmSymbols::address_size_name()) {
4811       mirror->int_field_put(fd->offset(), _address_size);
4812     } else if (fd->name() == vmSymbols::page_size_name()) {
4813       mirror->int_field_put(fd->offset(), _page_size);
4814     } else if (fd->name() == vmSymbols::big_endian_name()) {
4815       mirror->bool_field_put(fd->offset(), _big_endian);
4816     } else if (fd->name() == vmSymbols::use_unaligned_access_name()) {
4817       mirror->bool_field_put(fd->offset(), _use_unaligned_access);
4818     } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) {
4819       mirror->int_field_put(fd->offset(), _data_cache_line_flush_size);
4820     } else {
4821       assert(false, "unexpected UnsafeConstants field");
4822     }
4823   }
4824 };
4825 
4826 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() {
4827   UnsafeConstantsFixup fixup;
4828   vmClasses::UnsafeConstants_klass()->do_local_static_fields(&fixup);
4829 }
4830 
4831 
4832 // java_lang_StackTraceElement
4833 
4834 int java_lang_StackTraceElement::_methodName_offset;
4835 int java_lang_StackTraceElement::_fileName_offset;
4836 int java_lang_StackTraceElement::_lineNumber_offset;
4837 int java_lang_StackTraceElement::_moduleName_offset;
4838 int java_lang_StackTraceElement::_moduleVersion_offset;
4839 int java_lang_StackTraceElement::_classLoaderName_offset;
4840 int java_lang_StackTraceElement::_declaringClass_offset;
4841 int java_lang_StackTraceElement::_declaringClassObject_offset;
4842 
4843 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4844   macro(_declaringClassObject_offset,  k, "declaringClassObject", class_signature, false); \
4845   macro(_classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4846   macro(_moduleName_offset,      k, "moduleName",      string_signature, false); \
4847   macro(_moduleVersion_offset,   k, "moduleVersion",   string_signature, false); \
4848   macro(_declaringClass_offset,  k, "declaringClass",  string_signature, false); \
4849   macro(_methodName_offset,      k, "methodName",      string_signature, false); \
4850   macro(_fileName_offset,        k, "fileName",        string_signature, false); \
4851   macro(_lineNumber_offset,      k, "lineNumber",      int_signature,    false)
4852 
4853 // Support for java_lang_StackTraceElement
4854 void java_lang_StackTraceElement::compute_offsets() {
4855   InstanceKlass* k = vmClasses::StackTraceElement_klass();
4856   STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4857 }
4858 
4859 #if INCLUDE_CDS
4860 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
4861   STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4862 }
4863 #endif
4864 
4865 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
4866   element->obj_field_put(_fileName_offset, value);
4867 }
4868 
4869 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
4870   element->obj_field_put(_declaringClass_offset, value);
4871 }
4872 
4873 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
4874   element->obj_field_put(_methodName_offset, value);
4875 }
4876 
4877 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
4878   element->int_field_put(_lineNumber_offset, value);
4879 }
4880 
4881 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
4882   element->obj_field_put(_moduleName_offset, value);
4883 }
4884 
4885 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
4886   element->obj_field_put(_moduleVersion_offset, value);
4887 }
4888 
4889 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
4890   element->obj_field_put(_classLoaderName_offset, value);
4891 }
4892 
4893 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
4894   element->obj_field_put(_declaringClassObject_offset, value);
4895 }
4896 
4897 
4898 // java_lang_AssertionStatusDirectives
4899 
4900 int java_lang_AssertionStatusDirectives::_classes_offset;
4901 int java_lang_AssertionStatusDirectives::_classEnabled_offset;
4902 int java_lang_AssertionStatusDirectives::_packages_offset;
4903 int java_lang_AssertionStatusDirectives::_packageEnabled_offset;
4904 int java_lang_AssertionStatusDirectives::_deflt_offset;
4905 
4906 // Support for java Assertions - java_lang_AssertionStatusDirectives.
4907 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
4908   macro(_classes_offset,        k, "classes",        string_array_signature, false); \
4909   macro(_classEnabled_offset,   k, "classEnabled",   bool_array_signature, false); \
4910   macro(_packages_offset,       k, "packages",       string_array_signature, false); \
4911   macro(_packageEnabled_offset, k, "packageEnabled", bool_array_signature,   false); \
4912   macro(_deflt_offset,          k, "deflt",          bool_signature,         false)
4913 
4914 void java_lang_AssertionStatusDirectives::compute_offsets() {
4915   InstanceKlass* k = vmClasses::AssertionStatusDirectives_klass();
4916   ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4917 }
4918 
4919 #if INCLUDE_CDS
4920 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
4921   ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4922 }
4923 #endif
4924 
4925 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
4926   o->obj_field_put(_classes_offset, val);
4927 }
4928 
4929 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
4930   o->obj_field_put(_classEnabled_offset, val);
4931 }
4932 
4933 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
4934   o->obj_field_put(_packages_offset, val);
4935 }
4936 
4937 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
4938   o->obj_field_put(_packageEnabled_offset, val);
4939 }
4940 
4941 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
4942   o->bool_field_put(_deflt_offset, val);
4943 }
4944 
4945 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
4946 
4947 #define AOS_FIELDS_DO(macro) \
4948   macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
4949 
4950 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
4951   InstanceKlass* k = vmClasses::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
4952   AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4953 }
4954 
4955 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
4956   assert(_owner_offset != 0, "Must be initialized");
4957   return obj->obj_field(_owner_offset);
4958 }
4959 
4960 #if INCLUDE_CDS
4961 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
4962   AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4963 }
4964 #endif
4965 
4966 int vector_VectorPayload::_payload_offset;
4967 
4968 #define VECTORPAYLOAD_FIELDS_DO(macro) \
4969   macro(_payload_offset, k, "payload", object_signature, false)
4970 
4971 void vector_VectorPayload::compute_offsets() {
4972   InstanceKlass* k = vmClasses::vector_VectorPayload_klass();
4973   VECTORPAYLOAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4974 }
4975 
4976 #if INCLUDE_CDS
4977 void vector_VectorPayload::serialize_offsets(SerializeClosure* f) {
4978   VECTORPAYLOAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4979 }
4980 #endif
4981 
4982 void vector_VectorPayload::set_payload(oop o, oop val) {
4983   o->obj_field_put(_payload_offset, val);
4984 }
4985 
4986 bool vector_VectorPayload::is_instance(oop obj) {
4987   return obj != nullptr && is_subclass(obj->klass());
4988 }
4989 
4990 int java_lang_Integer_IntegerCache::_static_cache_offset;
4991 int java_lang_Long_LongCache::_static_cache_offset;
4992 int java_lang_Character_CharacterCache::_static_cache_offset;
4993 int java_lang_Short_ShortCache::_static_cache_offset;
4994 int java_lang_Byte_ByteCache::_static_cache_offset;
4995 
4996 #define INTEGER_CACHE_FIELDS_DO(macro) \
4997   macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true)
4998 
4999 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) {
5000   guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5001   INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5002 }
5003 
5004 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) {
5005   oop base = ik->static_field_base_raw();
5006   return objArrayOop(base->obj_field(_static_cache_offset));
5007 }
5008 
5009 Symbol* java_lang_Integer_IntegerCache::symbol() {
5010   return vmSymbols::java_lang_Integer_IntegerCache();
5011 }
5012 
5013 #if INCLUDE_CDS
5014 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) {
5015   INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5016 }
5017 #endif
5018 #undef INTEGER_CACHE_FIELDS_DO
5019 
5020 jint java_lang_Integer::value(oop obj) {
5021    jvalue v;
5022    java_lang_boxing_object::get_value(obj, &v);
5023    return v.i;
5024 }
5025 
5026 #define LONG_CACHE_FIELDS_DO(macro) \
5027   macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true)
5028 
5029 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) {
5030   guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5031   LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5032 }
5033 
5034 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) {
5035   oop base = ik->static_field_base_raw();
5036   return objArrayOop(base->obj_field(_static_cache_offset));
5037 }
5038 
5039 Symbol* java_lang_Long_LongCache::symbol() {
5040   return vmSymbols::java_lang_Long_LongCache();
5041 }
5042 
5043 #if INCLUDE_CDS
5044 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) {
5045   LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5046 }
5047 #endif
5048 #undef LONG_CACHE_FIELDS_DO
5049 
5050 jlong java_lang_Long::value(oop obj) {
5051    jvalue v;
5052    java_lang_boxing_object::get_value(obj, &v);
5053    return v.j;
5054 }
5055 
5056 #define CHARACTER_CACHE_FIELDS_DO(macro) \
5057   macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true)
5058 
5059 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) {
5060   guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5061   CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5062 }
5063 
5064 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) {
5065   oop base = ik->static_field_base_raw();
5066   return objArrayOop(base->obj_field(_static_cache_offset));
5067 }
5068 
5069 Symbol* java_lang_Character_CharacterCache::symbol() {
5070   return vmSymbols::java_lang_Character_CharacterCache();
5071 }
5072 
5073 #if INCLUDE_CDS
5074 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) {
5075   CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5076 }
5077 #endif
5078 #undef CHARACTER_CACHE_FIELDS_DO
5079 
5080 jchar java_lang_Character::value(oop obj) {
5081    jvalue v;
5082    java_lang_boxing_object::get_value(obj, &v);
5083    return v.c;
5084 }
5085 
5086 #define SHORT_CACHE_FIELDS_DO(macro) \
5087   macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true)
5088 
5089 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) {
5090   guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5091   SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5092 }
5093 
5094 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) {
5095   oop base = ik->static_field_base_raw();
5096   return objArrayOop(base->obj_field(_static_cache_offset));
5097 }
5098 
5099 Symbol* java_lang_Short_ShortCache::symbol() {
5100   return vmSymbols::java_lang_Short_ShortCache();
5101 }
5102 
5103 #if INCLUDE_CDS
5104 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) {
5105   SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5106 }
5107 #endif
5108 #undef SHORT_CACHE_FIELDS_DO
5109 
5110 jshort java_lang_Short::value(oop obj) {
5111    jvalue v;
5112    java_lang_boxing_object::get_value(obj, &v);
5113    return v.s;
5114 }
5115 
5116 #define BYTE_CACHE_FIELDS_DO(macro) \
5117   macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true)
5118 
5119 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) {
5120   guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5121   BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5122 }
5123 
5124 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) {
5125   oop base = ik->static_field_base_raw();
5126   return objArrayOop(base->obj_field(_static_cache_offset));
5127 }
5128 
5129 Symbol* java_lang_Byte_ByteCache::symbol() {
5130   return vmSymbols::java_lang_Byte_ByteCache();
5131 }
5132 
5133 #if INCLUDE_CDS
5134 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) {
5135   BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5136 }
5137 #endif
5138 #undef BYTE_CACHE_FIELDS_DO
5139 
5140 jbyte java_lang_Byte::value(oop obj) {
5141    jvalue v;
5142    java_lang_boxing_object::get_value(obj, &v);
5143    return v.b;
5144 }
5145 
5146 int java_lang_Boolean::_static_TRUE_offset;
5147 int java_lang_Boolean::_static_FALSE_offset;
5148 
5149 #define BOOLEAN_FIELDS_DO(macro) \
5150   macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \
5151   macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true)
5152 
5153 
5154 void java_lang_Boolean::compute_offsets(InstanceKlass *k) {
5155   guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5156   BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5157 }
5158 
5159 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) {
5160   oop base = ik->static_field_base_raw();
5161   return base->obj_field(_static_TRUE_offset);
5162 }
5163 
5164 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) {
5165   oop base = ik->static_field_base_raw();
5166   return base->obj_field(_static_FALSE_offset);
5167 }
5168 
5169 Symbol* java_lang_Boolean::symbol() {
5170   return vmSymbols::java_lang_Boolean();
5171 }
5172 
5173 #if INCLUDE_CDS
5174 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) {
5175   BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5176 }
5177 #endif
5178 #undef BOOLEAN_CACHE_FIELDS_DO
5179 
5180 jboolean java_lang_Boolean::value(oop obj) {
5181    jvalue v;
5182    java_lang_boxing_object::get_value(obj, &v);
5183    return v.z;
5184 }
5185 
5186 // java_lang_reflect_RecordComponent
5187 
5188 int java_lang_reflect_RecordComponent::_clazz_offset;
5189 int java_lang_reflect_RecordComponent::_name_offset;
5190 int java_lang_reflect_RecordComponent::_type_offset;
5191 int java_lang_reflect_RecordComponent::_accessor_offset;
5192 int java_lang_reflect_RecordComponent::_signature_offset;
5193 int java_lang_reflect_RecordComponent::_annotations_offset;
5194 int java_lang_reflect_RecordComponent::_typeAnnotations_offset;
5195 
5196 #define RECORDCOMPONENT_FIELDS_DO(macro) \
5197   macro(_clazz_offset,       k, "clazz",       class_signature,  false); \
5198   macro(_name_offset,        k, "name",        string_signature, false); \
5199   macro(_type_offset,        k, "type",        class_signature,  false); \
5200   macro(_accessor_offset,    k, "accessor",    reflect_method_signature, false); \
5201   macro(_signature_offset,   k, "signature",   string_signature, false); \
5202   macro(_annotations_offset, k, "annotations", byte_array_signature,     false); \
5203   macro(_typeAnnotations_offset, k, "typeAnnotations", byte_array_signature, false);
5204 
5205 // Support for java_lang_reflect_RecordComponent
5206 void java_lang_reflect_RecordComponent::compute_offsets() {
5207   InstanceKlass* k = vmClasses::RecordComponent_klass();
5208   RECORDCOMPONENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5209 }
5210 
5211 #if INCLUDE_CDS
5212 void java_lang_reflect_RecordComponent::serialize_offsets(SerializeClosure* f) {
5213   RECORDCOMPONENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5214 }
5215 #endif
5216 
5217 void java_lang_reflect_RecordComponent::set_clazz(oop element, oop value) {
5218   element->obj_field_put(_clazz_offset, value);
5219 }
5220 
5221 void java_lang_reflect_RecordComponent::set_name(oop element, oop value) {
5222   element->obj_field_put(_name_offset, value);
5223 }
5224 
5225 void java_lang_reflect_RecordComponent::set_type(oop element, oop value) {
5226   element->obj_field_put(_type_offset, value);
5227 }
5228 
5229 void java_lang_reflect_RecordComponent::set_accessor(oop element, oop value) {
5230   element->obj_field_put(_accessor_offset, value);
5231 }
5232 
5233 void java_lang_reflect_RecordComponent::set_signature(oop element, oop value) {
5234   element->obj_field_put(_signature_offset, value);
5235 }
5236 
5237 void java_lang_reflect_RecordComponent::set_annotations(oop element, oop value) {
5238   element->obj_field_put(_annotations_offset, value);
5239 }
5240 
5241 void java_lang_reflect_RecordComponent::set_typeAnnotations(oop element, oop value) {
5242   element->obj_field_put(_typeAnnotations_offset, value);
5243 }
5244 
5245 // java_lang_InternalError
5246 int java_lang_InternalError::_during_unsafe_access_offset;
5247 
5248 void java_lang_InternalError::set_during_unsafe_access(oop internal_error) {
5249   internal_error->bool_field_put(_during_unsafe_access_offset, true);
5250 }
5251 
5252 jboolean java_lang_InternalError::during_unsafe_access(oop internal_error) {
5253   return internal_error->bool_field(_during_unsafe_access_offset);
5254 }
5255 
5256 void java_lang_InternalError::compute_offsets() {
5257   INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
5258 }
5259 
5260 #if INCLUDE_CDS
5261 void java_lang_InternalError::serialize_offsets(SerializeClosure* f) {
5262   INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
5263 }
5264 #endif
5265 
5266 #define BASIC_JAVA_CLASSES_DO_PART1(f) \
5267   f(java_lang_Class) \
5268   f(java_lang_String) \
5269   f(java_lang_ref_Reference) \
5270   //end
5271 
5272 #define BASIC_JAVA_CLASSES_DO_PART2(f) \
5273   f(java_lang_System) \
5274   f(java_lang_ClassLoader) \
5275   f(java_lang_Throwable) \
5276   f(java_lang_Thread) \
5277   f(java_lang_Thread_FieldHolder) \
5278   f(java_lang_Thread_Constants) \
5279   f(java_lang_ThreadGroup) \
5280   f(java_lang_VirtualThread) \
5281   f(java_lang_InternalError) \
5282   f(java_lang_AssertionStatusDirectives) \
5283   f(java_lang_ref_SoftReference) \
5284   f(java_lang_invoke_MethodHandle) \
5285   f(java_lang_invoke_DirectMethodHandle) \
5286   f(java_lang_invoke_MemberName) \
5287   f(java_lang_invoke_ResolvedMethodName) \
5288   f(java_lang_invoke_LambdaForm) \
5289   f(java_lang_invoke_MethodType) \
5290   f(java_lang_invoke_CallSite) \
5291   f(java_lang_invoke_ConstantCallSite) \
5292   f(java_lang_invoke_MethodHandleNatives_CallSiteContext) \
5293   f(java_security_AccessControlContext) \
5294   f(java_lang_reflect_AccessibleObject) \
5295   f(java_lang_reflect_Method) \
5296   f(java_lang_reflect_Constructor) \
5297   f(java_lang_reflect_Field) \
5298   f(java_lang_reflect_RecordComponent) \
5299   f(reflect_ConstantPool) \
5300   f(reflect_UnsafeStaticFieldAccessorImpl) \
5301   f(java_lang_reflect_Parameter) \
5302   f(java_lang_Module) \
5303   f(java_lang_StackTraceElement) \
5304   f(java_lang_StackFrameInfo) \
5305   f(java_lang_LiveStackFrameInfo) \
5306   f(jdk_internal_vm_ContinuationScope) \
5307   f(jdk_internal_vm_Continuation) \
5308   f(jdk_internal_vm_StackChunk) \
5309   f(java_util_concurrent_locks_AbstractOwnableSynchronizer) \
5310   f(jdk_internal_foreign_abi_NativeEntryPoint) \
5311   f(jdk_internal_foreign_abi_ABIDescriptor) \
5312   f(jdk_internal_foreign_abi_VMStorage) \
5313   f(jdk_internal_foreign_abi_CallConv) \
5314   f(jdk_internal_misc_UnsafeConstants) \
5315   f(java_lang_boxing_object) \
5316   f(vector_VectorPayload) \
5317   //end
5318 
5319 #define BASIC_JAVA_CLASSES_DO(f) \
5320         BASIC_JAVA_CLASSES_DO_PART1(f) \
5321         BASIC_JAVA_CLASSES_DO_PART2(f)
5322 
5323 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
5324 
5325 // Compute field offsets of all the classes in this file
5326 void JavaClasses::compute_offsets() {
5327   if (UseSharedSpaces) {
5328     JVMTI_ONLY(assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
5329                                                          JvmtiExport::has_early_class_hook_env()),
5330                       "JavaClasses::compute_offsets() must be called in early JVMTI phase."));
5331     // None of the classes used by the rest of this function can be replaced by
5332     // JVMTI ClassFileLoadHook.
5333     // We are safe to use the archived offsets, which have already been restored
5334     // by JavaClasses::serialize_offsets, without computing the offsets again.
5335     return;
5336   }
5337 
5338   // We have already called the compute_offsets() of the
5339   // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String, java_lang_Class and
5340   // java_lang_ref_Reference) earlier inside vmClasses::resolve_all()
5341   BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
5342 }
5343 
5344 #if INCLUDE_CDS
5345 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
5346 
5347 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
5348   BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
5349 }
5350 #endif
5351 
5352 #if INCLUDE_CDS_JAVA_HEAP
5353 bool JavaClasses::is_supported_for_archiving(oop obj) {
5354   Klass* klass = obj->klass();
5355 
5356   if (klass == vmClasses::ClassLoader_klass() ||  // ClassLoader::loader_data is malloc'ed.
5357       // The next 3 classes are used to implement java.lang.invoke, and are not used directly in
5358       // regular Java code. The implementation of java.lang.invoke uses generated hidden classes
5359       // (e.g., as referenced by ResolvedMethodName::vmholder) that are not yet supported by CDS.
5360       // So for now we cannot not support these classes for archiving.
5361       //
5362       // These objects typically are not referenced by static fields, but rather by resolved
5363       // constant pool entries, so excluding them shouldn't affect the archiving of static fields.
5364       klass == vmClasses::ResolvedMethodName_klass() ||
5365       klass == vmClasses::MemberName_klass() ||
5366       klass == vmClasses::Context_klass() ||
5367       // It's problematic to archive Reference objects. One of the reasons is that
5368       // Reference::discovered may pull in unwanted objects (see JDK-8284336)
5369       klass->is_subclass_of(vmClasses::Reference_klass())) {
5370     return false;
5371   }
5372 
5373   return true;
5374 }
5375 #endif
5376 
5377 #ifndef PRODUCT
5378 
5379 // These functions exist to assert the validity of de-serialized offsets in boxing object as a sanity check.
5380 
5381 bool JavaClasses::check_offset(const char *klass_name, int deserialized_offset, const char *field_name,
5382                                const char* field_sig) {
5383   EXCEPTION_MARK;
5384   fieldDescriptor fd;
5385   TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name);
5386   Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
5387   InstanceKlass* ik = InstanceKlass::cast(k);
5388   TempNewSymbol f_name = SymbolTable::new_symbol(field_name);
5389   TempNewSymbol f_sig  = SymbolTable::new_symbol(field_sig);
5390   if (!ik->find_local_field(f_name, f_sig, &fd)) {
5391     tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
5392     return false;
5393   }
5394   if (fd.is_static()) {
5395     tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
5396     return false;
5397   }
5398   if (fd.offset() == deserialized_offset ) {
5399     return true;
5400   } else {
5401     tty->print_cr("Offset of nonstatic field %s.%s is deserialized as %d but should really be %d.",
5402                   klass_name, field_name, deserialized_offset, fd.offset());
5403     return false;
5404   }
5405 }
5406 
5407 void JavaClasses::check_offsets() {
5408   bool valid = true;
5409 
5410 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5411   valid &= check_offset(klass_name, cpp_klass_name :: _##field_name ## _offset, #field_name, field_sig)
5412 
5413 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5414   valid &= check_offset(klass_name, cpp_klass_name :: _##long_ ## field_name ## _offset, #field_name, field_sig)
5415 
5416   // Boxed primitive objects (java_lang_boxing_object)
5417 
5418   CHECK_OFFSET("java/lang/Boolean",   java_lang_boxing_object, value, "Z");
5419   CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
5420   CHECK_OFFSET("java/lang/Float",     java_lang_boxing_object, value, "F");
5421   CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
5422   CHECK_OFFSET("java/lang/Byte",      java_lang_boxing_object, value, "B");
5423   CHECK_OFFSET("java/lang/Short",     java_lang_boxing_object, value, "S");
5424   CHECK_OFFSET("java/lang/Integer",   java_lang_boxing_object, value, "I");
5425   CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
5426 
5427   if (!valid) vm_exit_during_initialization("Field offset verification failed");
5428 }
5429 
5430 #endif // PRODUCT
5431 
5432 int InjectedField::compute_offset() {
5433   InstanceKlass* ik = InstanceKlass::cast(klass());
5434   for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5435     if (!may_be_java && !fs.field_flags().is_injected()) {
5436       // Only look at injected fields
5437       continue;
5438     }
5439     if (fs.name() == name() && fs.signature() == signature()) {
5440       return fs.offset();
5441     }
5442   }
5443   ResourceMark rm;
5444   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)" : "");
5445 #ifndef PRODUCT
5446   ik->print();
5447   tty->print_cr("all fields:");
5448   for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5449     tty->print_cr("  name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
5450   }
5451 #endif //PRODUCT
5452   vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
5453   return -1;
5454 }
5455 
5456 void javaClasses_init() {
5457   JavaClasses::compute_offsets();
5458   JavaClasses::check_offsets();
5459   FilteredFieldsMap::initialize();  // must be done after computing offsets.
5460 }