1 /*
   2  * Copyright (c) 1997, 2024, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "precompiled.hpp"
  26 #include "cds/archiveBuilder.hpp"
  27 #include "cds/archiveHeapLoader.hpp"
  28 #include "cds/cdsConfig.hpp"
  29 #include "cds/heapShared.hpp"
  30 #include "cds/metaspaceShared.hpp"
  31 #include "classfile/altHashing.hpp"
  32 #include "classfile/classLoaderData.inline.hpp"
  33 #include "classfile/javaClasses.inline.hpp"
  34 #include "classfile/javaClassesImpl.hpp"
  35 #include "classfile/javaThreadStatus.hpp"
  36 #include "classfile/moduleEntry.hpp"
  37 #include "classfile/stringTable.hpp"
  38 #include "classfile/symbolTable.hpp"
  39 #include "classfile/systemDictionary.hpp"
  40 #include "classfile/vmClasses.hpp"
  41 #include "classfile/vmSymbols.hpp"
  42 #include "code/debugInfo.hpp"
  43 #include "code/dependencyContext.hpp"
  44 #include "code/pcDesc.hpp"
  45 #include "gc/shared/collectedHeap.inline.hpp"
  46 #include "interpreter/interpreter.hpp"
  47 #include "interpreter/linkResolver.hpp"
  48 #include "jvm.h"
  49 #include "logging/log.hpp"
  50 #include "logging/logStream.hpp"
  51 #include "memory/oopFactory.hpp"
  52 #include "memory/resourceArea.hpp"
  53 #include "memory/universe.hpp"
  54 #include "oops/fieldInfo.hpp"
  55 #include "oops/fieldStreams.inline.hpp"
  56 #include "oops/instanceKlass.inline.hpp"
  57 #include "oops/instanceMirrorKlass.hpp"
  58 #include "oops/klass.hpp"
  59 #include "oops/klass.inline.hpp"
  60 #include "oops/method.inline.hpp"
  61 #include "oops/objArrayKlass.hpp"
  62 #include "oops/objArrayOop.inline.hpp"
  63 #include "oops/oopCast.inline.hpp"
  64 #include "oops/oop.inline.hpp"
  65 #include "oops/symbol.hpp"
  66 #include "oops/recordComponent.hpp"
  67 #include "oops/typeArrayOop.inline.hpp"
  68 #include "prims/jvmtiExport.hpp"
  69 #include "prims/methodHandles.hpp"
  70 #include "prims/resolvedMethodTable.hpp"
  71 #include "runtime/continuationEntry.inline.hpp"
  72 #include "runtime/continuationJavaClasses.inline.hpp"
  73 #include "runtime/fieldDescriptor.inline.hpp"
  74 #include "runtime/frame.inline.hpp"
  75 #include "runtime/handles.inline.hpp"
  76 #include "runtime/handshake.hpp"
  77 #include "runtime/init.hpp"
  78 #include "runtime/interfaceSupport.inline.hpp"
  79 #include "runtime/java.hpp"
  80 #include "runtime/javaCalls.hpp"
  81 #include "runtime/javaThread.hpp"
  82 #include "runtime/jniHandles.inline.hpp"
  83 #include "runtime/reflectionUtils.hpp"
  84 #include "runtime/safepoint.hpp"
  85 #include "runtime/safepointVerifiers.hpp"
  86 #include "runtime/threadSMR.hpp"
  87 #include "runtime/vframe.inline.hpp"
  88 #include "runtime/vm_version.hpp"
  89 #include "utilities/align.hpp"
  90 #include "utilities/globalDefinitions.hpp"
  91 #include "utilities/growableArray.hpp"
  92 #include "utilities/preserveException.hpp"
  93 #include "utilities/utf8.hpp"
  94 #if INCLUDE_JVMCI
  95 #include "jvmci/jvmciJavaClasses.hpp"
  96 #endif
  97 
  98 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java)           \
  99   { VM_CLASS_ID(klass), VM_SYMBOL_ENUM_NAME(name##_name), VM_SYMBOL_ENUM_NAME(signature), may_be_java },
 100 
 101 InjectedField JavaClasses::_injected_fields[] = {
 102   ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
 103 };
 104 
 105 // Register native methods of Object
 106 void java_lang_Object::register_natives(TRAPS) {
 107   InstanceKlass* obj = vmClasses::Object_klass();
 108   Method::register_native(obj, vmSymbols::hashCode_name(),
 109                           vmSymbols::void_int_signature(), (address) &JVM_IHashCode, CHECK);
 110   Method::register_native(obj, vmSymbols::wait_name(),
 111                           vmSymbols::long_void_signature(), (address) &JVM_MonitorWait, CHECK);
 112   Method::register_native(obj, vmSymbols::notify_name(),
 113                           vmSymbols::void_method_signature(), (address) &JVM_MonitorNotify, CHECK);
 114   Method::register_native(obj, vmSymbols::notifyAll_name(),
 115                           vmSymbols::void_method_signature(), (address) &JVM_MonitorNotifyAll, CHECK);
 116   Method::register_native(obj, vmSymbols::clone_name(),
 117                           vmSymbols::void_object_signature(), (address) &JVM_Clone, THREAD);
 118 }
 119 
 120 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
 121   return _injected_fields[(int)id].compute_offset();
 122 }
 123 
 124 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
 125   *field_count = 0;
 126 
 127   vmSymbolID sid = vmSymbols::find_sid(class_name);
 128   if (sid == vmSymbolID::NO_SID) {
 129     // Only well known classes can inject fields
 130     return nullptr;
 131   }
 132 
 133   int count = 0;
 134   int start = -1;
 135 
 136 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
 137   if (sid == VM_SYMBOL_ENUM_NAME(klass)) {                         \
 138     count++;                                                       \
 139     if (start == -1) {                                             \
 140       start = (int)InjectedFieldID::klass##_##name##_enum;         \
 141     }                                                              \
 142   }
 143   ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
 144 #undef LOOKUP_INJECTED_FIELD
 145 
 146   if (start != -1) {
 147     *field_count = count;
 148     return _injected_fields + start;
 149   }
 150   return nullptr;
 151 }
 152 
 153 
 154 // Helpful routine for computing field offsets at run time rather than hardcoding them
 155 // Finds local fields only, including static fields.  Static field offsets are from the
 156 // beginning of the mirror.
 157 void JavaClasses::compute_offset(int &dest_offset,
 158                                  InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
 159                                  bool is_static) {
 160   fieldDescriptor fd;
 161   if (ik == nullptr) {
 162     ResourceMark rm;
 163     log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string());
 164     vm_exit_during_initialization("Invalid layout of well-known class");
 165   }
 166 
 167   if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) {
 168     ResourceMark rm;
 169     log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(),
 170                      name_symbol->as_C_string(), signature_symbol->as_C_string());
 171 #ifndef PRODUCT
 172     // Prints all fields and offsets
 173     Log(class) lt;
 174     LogStream ls(lt.error());
 175     ik->print_on(&ls);
 176 #endif //PRODUCT
 177     vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
 178   }
 179   dest_offset = fd.offset();
 180 }
 181 
 182 // Overloading to pass name as a string.
 183 void JavaClasses::compute_offset(int& dest_offset, InstanceKlass* ik,
 184                                  const char* name_string, Symbol* signature_symbol,
 185                                  bool is_static) {
 186   TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string));
 187   if (name == nullptr) {
 188     ResourceMark rm;
 189     log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string);
 190     vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name());
 191   }
 192   compute_offset(dest_offset, ik, name, signature_symbol, is_static);
 193 }
 194 
 195 // java_lang_String
 196 
 197 int java_lang_String::_value_offset;
 198 int java_lang_String::_hash_offset;
 199 int java_lang_String::_hashIsZero_offset;
 200 int java_lang_String::_coder_offset;
 201 int java_lang_String::_flags_offset;
 202 
 203 bool java_lang_String::_initialized;
 204 
 205 
 206 bool java_lang_String::test_and_set_flag(oop java_string, uint8_t flag_mask) {
 207   uint8_t* addr = flags_addr(java_string);
 208   uint8_t value = Atomic::load(addr);
 209   while ((value & flag_mask) == 0) {
 210     uint8_t old_value = value;
 211     value |= flag_mask;
 212     value = Atomic::cmpxchg(addr, old_value, value);
 213     if (value == old_value) return false; // Flag bit changed from 0 to 1.
 214   }
 215   return true;                  // Flag bit is already 1.
 216 }
 217 
 218 #define STRING_FIELDS_DO(macro) \
 219   macro(_value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \
 220   macro(_hash_offset,  k, "hash",                  int_signature,        false); \
 221   macro(_hashIsZero_offset, k, "hashIsZero",       bool_signature,       false); \
 222   macro(_coder_offset, k, "coder",                 byte_signature,       false);
 223 
 224 void java_lang_String::compute_offsets() {
 225   if (_initialized) {
 226     return;
 227   }
 228 
 229   InstanceKlass* k = vmClasses::String_klass();
 230   STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
 231   STRING_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
 232 
 233   _initialized = true;
 234 }
 235 
 236 #if INCLUDE_CDS
 237 void java_lang_String::serialize_offsets(SerializeClosure* f) {
 238   STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
 239   STRING_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
 240   f->do_bool(&_initialized);
 241 }
 242 #endif
 243 
 244 class CompactStringsFixup : public FieldClosure {
 245 private:
 246   bool _value;
 247 
 248 public:
 249   CompactStringsFixup(bool value) : _value(value) {}
 250 
 251   void do_field(fieldDescriptor* fd) {
 252     if (fd->name() == vmSymbols::compact_strings_name()) {
 253       oop mirror = fd->field_holder()->java_mirror();
 254       assert(fd->field_holder() == vmClasses::String_klass(), "Should be String");
 255       assert(mirror != nullptr, "String must have mirror already");
 256       mirror->bool_field_put(fd->offset(), _value);
 257     }
 258   }
 259 };
 260 
 261 void java_lang_String::set_compact_strings(bool value) {
 262   CompactStringsFixup fix(value);
 263   vmClasses::String_klass()->do_local_static_fields(&fix);
 264 }
 265 
 266 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
 267   assert(_initialized, "Must be initialized");
 268   assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
 269 
 270   // Create the String object first, so there's a chance that the String
 271   // and the char array it points to end up in the same cache line.
 272   oop obj;
 273   obj = vmClasses::String_klass()->allocate_instance(CHECK_NH);
 274 
 275   // Create the char array.  The String object must be handlized here
 276   // because GC can happen as a result of the allocation attempt.
 277   Handle h_obj(THREAD, obj);
 278   int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
 279   typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
 280 
 281   // Point the String at the char array
 282   obj = h_obj();
 283   set_value(obj, buffer);
 284   // No need to zero the offset, allocation zero'ed the entire String object
 285   set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
 286   return h_obj;
 287 }
 288 
 289 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) {
 290   bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
 291   Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
 292   typeArrayOop buffer = value(h_obj());
 293   assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
 294   if (is_latin1) {
 295     for (int index = 0; index < length; index++) {
 296       buffer->byte_at_put(index, (jbyte)unicode[index]);
 297     }
 298   } else {
 299     for (int index = 0; index < length; index++) {
 300       buffer->char_at_put(index, unicode[index]);
 301     }
 302   }
 303 
 304 #ifdef ASSERT
 305   {
 306     ResourceMark rm;
 307     char* expected = UNICODE::as_utf8(unicode, length);
 308     char* actual = as_utf8_string(h_obj());
 309     if (strcmp(expected, actual) != 0) {
 310       fatal("Unicode conversion failure: %s --> %s", expected, actual);
 311     }
 312   }
 313 #endif
 314 
 315   return h_obj;
 316 }
 317 
 318 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) {
 319   Handle h_obj = create_from_unicode(unicode, length, CHECK_NULL);
 320   return h_obj();
 321 }
 322 
 323 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
 324   if (utf8_str == nullptr) {
 325     return Handle();
 326   }
 327   bool has_multibyte, is_latin1;
 328   int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
 329   if (!CompactStrings) {
 330     has_multibyte = true;
 331     is_latin1 = false;
 332   }
 333 
 334   Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
 335   if (length > 0) {
 336     if (!has_multibyte) {
 337       const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
 338       ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
 339     } else if (is_latin1) {
 340       UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
 341     } else {
 342       UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
 343     }
 344   }
 345 
 346 #ifdef ASSERT
 347   // This check is too strict when the input string is not a valid UTF8.
 348   // For example, it may be created with arbitrary content via jni_NewStringUTF.
 349   if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, (int)strlen(utf8_str), false)) {
 350     ResourceMark rm;
 351     const char* expected = utf8_str;
 352     char* actual = as_utf8_string(h_obj());
 353     if (strcmp(expected, actual) != 0) {
 354       fatal("String conversion failure: %s --> %s", expected, actual);
 355     }
 356   }
 357 #endif
 358 
 359   return h_obj;
 360 }
 361 
 362 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
 363   Handle h_obj = create_from_str(utf8_str, CHECK_NULL);
 364   return h_obj();
 365 }
 366 
 367 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
 368   const char* utf8_str = (char*)symbol->bytes();
 369   int utf8_len = symbol->utf8_length();
 370 
 371   bool has_multibyte, is_latin1;
 372   int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
 373   if (!CompactStrings) {
 374     has_multibyte = true;
 375     is_latin1 = false;
 376   }
 377 
 378   Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
 379   if (length > 0) {
 380     if (!has_multibyte) {
 381       const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
 382       ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
 383     } else if (is_latin1) {
 384       UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
 385     } else {
 386       UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
 387     }
 388   }
 389 
 390 #ifdef ASSERT
 391   {
 392     ResourceMark rm;
 393     const char* expected = symbol->as_utf8();
 394     char* actual = as_utf8_string(h_obj());
 395     if (strncmp(expected, actual, utf8_len) != 0) {
 396       fatal("Symbol conversion failure: %s --> %s", expected, actual);
 397     }
 398   }
 399 #endif
 400 
 401   return h_obj;
 402 }
 403 
 404 // Converts a C string to a Java String based on current encoding
 405 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
 406   assert(str != nullptr, "bad arguments");
 407 
 408   typedef jstring (JNICALL *to_java_string_fn_t)(JNIEnv*, const char *);
 409   static to_java_string_fn_t _to_java_string_fn = nullptr;
 410 
 411   if (_to_java_string_fn == nullptr) {
 412     void *lib_handle = os::native_java_library();
 413     _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "JNU_NewStringPlatform"));
 414 #if defined(_WIN32) && !defined(_WIN64)
 415     if (_to_java_string_fn == nullptr) {
 416       // On 32 bit Windows, also try __stdcall decorated name
 417       _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "_JNU_NewStringPlatform@8"));
 418     }
 419 #endif
 420     if (_to_java_string_fn == nullptr) {
 421       fatal("JNU_NewStringPlatform missing");
 422     }
 423   }
 424 
 425   jstring js = nullptr;
 426   {
 427     JavaThread* thread = THREAD;
 428     HandleMark hm(thread);
 429     ThreadToNativeFromVM ttn(thread);
 430     js = (_to_java_string_fn)(thread->jni_environment(), str);
 431   }
 432 
 433   Handle native_platform_string(THREAD, JNIHandles::resolve(js));
 434   JNIHandles::destroy_local(js);  // destroy local JNIHandle.
 435   return native_platform_string;
 436 }
 437 
 438 // Converts a Java String to a native C string that can be used for
 439 // native OS calls.
 440 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
 441   typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
 442   static to_platform_string_fn_t _to_platform_string_fn = nullptr;
 443 
 444   if (_to_platform_string_fn == nullptr) {
 445     void *lib_handle = os::native_java_library();
 446     _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
 447     if (_to_platform_string_fn == nullptr) {
 448       fatal("GetStringPlatformChars missing");
 449     }
 450   }
 451 
 452   char *native_platform_string;
 453   jstring js;
 454   { JavaThread* thread = THREAD;
 455     js = (jstring) JNIHandles::make_local(thread, java_string());
 456     HandleMark hm(thread);
 457     ThreadToNativeFromVM ttn(thread);
 458     JNIEnv *env = thread->jni_environment();
 459     bool is_copy;
 460     native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
 461     assert(is_copy == JNI_TRUE, "is_copy value changed");
 462   }
 463 
 464   // Uses a store barrier and therefore needs to be in vm state
 465   JNIHandles::destroy_local(js);
 466 
 467   return native_platform_string;
 468 }
 469 
 470 Handle java_lang_String::externalize_classname(Symbol* java_name, TRAPS) {
 471   ResourceMark rm(THREAD);
 472   return create_from_str(java_name->as_klass_external_name(), THREAD);
 473 }
 474 
 475 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
 476   jchar* result = as_unicode_string_or_null(java_string, length);
 477   if (result == nullptr) {
 478     THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
 479   }
 480   return result;
 481 }
 482 
 483 jchar* java_lang_String::as_unicode_string_or_null(oop java_string, int& length) {
 484   typeArrayOop value  = java_lang_String::value(java_string);
 485                length = java_lang_String::length(java_string, value);
 486   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 487 
 488   jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
 489   if (result != nullptr) {
 490     if (!is_latin1) {
 491       for (int index = 0; index < length; index++) {
 492         result[index] = value->char_at(index);
 493       }
 494     } else {
 495       for (int index = 0; index < length; index++) {
 496         result[index] = ((jchar) value->byte_at(index)) & 0xff;
 497       }
 498     }
 499   }
 500   return result;
 501 }
 502 
 503 inline unsigned int java_lang_String::hash_code_impl(oop java_string, bool update) {
 504   // The hash and hashIsZero fields are subject to a benign data race,
 505   // making it crucial to ensure that any observable result of the
 506   // calculation in this method stays correct under any possible read of
 507   // these fields. Necessary restrictions to allow this to be correct
 508   // without explicit memory fences or similar concurrency primitives is
 509   // that we can ever only write to one of these two fields for a given
 510   // String instance, and that the computation is idempotent and derived
 511   // from immutable state
 512   assert(_initialized && (_hash_offset > 0) && (_hashIsZero_offset > 0), "Must be initialized");
 513   if (java_lang_String::hash_is_set(java_string)) {
 514     return java_string->int_field(_hash_offset);
 515   }
 516 
 517   typeArrayOop value = java_lang_String::value(java_string);
 518   int         length = java_lang_String::length(java_string, value);
 519   bool     is_latin1 = java_lang_String::is_latin1(java_string);
 520 
 521   unsigned int hash = 0;
 522   if (length > 0) {
 523     if (is_latin1) {
 524       hash = java_lang_String::hash_code(value->byte_at_addr(0), length);
 525     } else {
 526       hash = java_lang_String::hash_code(value->char_at_addr(0), length);
 527     }
 528   }
 529 
 530   if (update) {
 531     if (hash != 0) {
 532       java_string->int_field_put(_hash_offset, hash);
 533     } else {
 534       java_string->bool_field_put(_hashIsZero_offset, true);
 535     }
 536   }
 537   return hash;
 538 }
 539 
 540 unsigned int java_lang_String::hash_code(oop java_string) {
 541   return hash_code_impl(java_string, /*update=*/true);
 542 }
 543 
 544 unsigned int java_lang_String::hash_code_noupdate(oop java_string) {
 545   return hash_code_impl(java_string, /*update=*/false);
 546 }
 547 
 548 
 549 char* java_lang_String::as_quoted_ascii(oop java_string) {
 550   typeArrayOop value  = java_lang_String::value(java_string);
 551   int          length = java_lang_String::length(java_string, value);
 552   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 553 
 554   if (length == 0) return nullptr;
 555 
 556   char* result;
 557   int result_length;
 558   if (!is_latin1) {
 559     jchar* base = value->char_at_addr(0);
 560     result_length = UNICODE::quoted_ascii_length(base, length) + 1;
 561     result = NEW_RESOURCE_ARRAY(char, result_length);
 562     UNICODE::as_quoted_ascii(base, length, result, result_length);
 563   } else {
 564     jbyte* base = value->byte_at_addr(0);
 565     result_length = UNICODE::quoted_ascii_length(base, length) + 1;
 566     result = NEW_RESOURCE_ARRAY(char, result_length);
 567     UNICODE::as_quoted_ascii(base, length, result, result_length);
 568   }
 569   assert(result_length >= length + 1, "must not be shorter");
 570   assert(result_length == (int)strlen(result) + 1, "must match");
 571   return result;
 572 }
 573 
 574 Symbol* java_lang_String::as_symbol(oop java_string) {
 575   typeArrayOop value  = java_lang_String::value(java_string);
 576   int          length = java_lang_String::length(java_string, value);
 577   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 578   if (!is_latin1) {
 579     jchar* base = (length == 0) ? nullptr : value->char_at_addr(0);
 580     Symbol* sym = SymbolTable::new_symbol(base, length);
 581     return sym;
 582   } else {
 583     ResourceMark rm;
 584     jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
 585     const char* base = UNICODE::as_utf8(position, length);
 586     Symbol* sym = SymbolTable::new_symbol(base, length);
 587     return sym;
 588   }
 589 }
 590 
 591 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
 592   typeArrayOop value  = java_lang_String::value(java_string);
 593   int          length = java_lang_String::length(java_string, value);
 594   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 595   if (!is_latin1) {
 596     jchar* base = (length == 0) ? nullptr : value->char_at_addr(0);
 597     return SymbolTable::probe_unicode(base, length);
 598   } else {
 599     ResourceMark rm;
 600     jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
 601     const char* base = UNICODE::as_utf8(position, length);
 602     return SymbolTable::probe(base, length);
 603   }
 604 }
 605 
 606 int java_lang_String::utf8_length(oop java_string, typeArrayOop value) {
 607   assert(value_equals(value, java_lang_String::value(java_string)),
 608          "value must be same as java_lang_String::value(java_string)");
 609   int length = java_lang_String::length(java_string, value);
 610   if (length == 0) {
 611     return 0;
 612   }
 613   if (!java_lang_String::is_latin1(java_string)) {
 614     return UNICODE::utf8_length(value->char_at_addr(0), length);
 615   } else {
 616     return UNICODE::utf8_length(value->byte_at_addr(0), length);
 617   }
 618 }
 619 
 620 int java_lang_String::utf8_length(oop java_string) {
 621   typeArrayOop value = java_lang_String::value(java_string);
 622   return utf8_length(java_string, value);
 623 }
 624 
 625 char* java_lang_String::as_utf8_string(oop java_string) {
 626   int length;
 627   return as_utf8_string(java_string, length);
 628 }
 629 
 630 char* java_lang_String::as_utf8_string(oop java_string, int& length) {
 631   typeArrayOop value = java_lang_String::value(java_string);
 632   length             = java_lang_String::length(java_string, value);
 633   bool     is_latin1 = java_lang_String::is_latin1(java_string);
 634   if (!is_latin1) {
 635     jchar* position = (length == 0) ? nullptr : value->char_at_addr(0);
 636     return UNICODE::as_utf8(position, length);
 637   } else {
 638     jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
 639     return UNICODE::as_utf8(position, length);
 640   }
 641 }
 642 
 643 // Uses a provided buffer if it's sufficiently large, otherwise allocates
 644 // a resource array to fit
 645 char* java_lang_String::as_utf8_string_full(oop java_string, char* buf, int buflen, int& utf8_len) {
 646   typeArrayOop value = java_lang_String::value(java_string);
 647   int            len = java_lang_String::length(java_string, value);
 648   bool     is_latin1 = java_lang_String::is_latin1(java_string);
 649   if (!is_latin1) {
 650     jchar *position = (len == 0) ? nullptr : value->char_at_addr(0);
 651     utf8_len = UNICODE::utf8_length(position, len);
 652     if (utf8_len >= buflen) {
 653       buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
 654     }
 655     return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
 656   } else {
 657     jbyte *position = (len == 0) ? nullptr : value->byte_at_addr(0);
 658     utf8_len = UNICODE::utf8_length(position, len);
 659     if (utf8_len >= buflen) {
 660       buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
 661     }
 662     return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
 663   }
 664 }
 665 
 666 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, int buflen) {
 667   assert(value_equals(value, java_lang_String::value(java_string)),
 668          "value must be same as java_lang_String::value(java_string)");
 669   int     length = java_lang_String::length(java_string, value);
 670   bool is_latin1 = java_lang_String::is_latin1(java_string);
 671   if (!is_latin1) {
 672     jchar* position = (length == 0) ? nullptr : value->char_at_addr(0);
 673     return UNICODE::as_utf8(position, length, buf, buflen);
 674   } else {
 675     jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
 676     return UNICODE::as_utf8(position, length, buf, buflen);
 677   }
 678 }
 679 
 680 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
 681   typeArrayOop value = java_lang_String::value(java_string);
 682   return as_utf8_string(java_string, value, buf, buflen);
 683 }
 684 
 685 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
 686   typeArrayOop value  = java_lang_String::value(java_string);
 687   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 688   assert(start + len <= java_lang_String::length(java_string), "just checking");
 689   if (!is_latin1) {
 690     jchar* position = value->char_at_addr(start);
 691     return UNICODE::as_utf8(position, len);
 692   } else {
 693     jbyte* position = value->byte_at_addr(start);
 694     return UNICODE::as_utf8(position, len);
 695   }
 696 }
 697 
 698 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, int buflen) {
 699   assert(value_equals(value, java_lang_String::value(java_string)),
 700          "value must be same as java_lang_String::value(java_string)");
 701   assert(start + len <= java_lang_String::length(java_string), "just checking");
 702   bool is_latin1 = java_lang_String::is_latin1(java_string);
 703   if (!is_latin1) {
 704     jchar* position = value->char_at_addr(start);
 705     return UNICODE::as_utf8(position, len, buf, buflen);
 706   } else {
 707     jbyte* position = value->byte_at_addr(start);
 708     return UNICODE::as_utf8(position, len, buf, buflen);
 709   }
 710 }
 711 
 712 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) {
 713   assert(java_string->klass() == vmClasses::String_klass(),
 714          "must be java_string");
 715   typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
 716   int length = java_lang_String::length(java_string, value);
 717   if (length != len) {
 718     return false;
 719   }
 720   bool is_latin1 = java_lang_String::is_latin1(java_string);
 721   if (!is_latin1) {
 722     for (int i = 0; i < len; i++) {
 723       if (value->char_at(i) != chars[i]) {
 724         return false;
 725       }
 726     }
 727   } else {
 728     for (int i = 0; i < len; i++) {
 729       if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
 730         return false;
 731       }
 732     }
 733   }
 734   return true;
 735 }
 736 
 737 bool java_lang_String::equals(oop str1, oop str2) {
 738   assert(str1->klass() == vmClasses::String_klass(),
 739          "must be java String");
 740   assert(str2->klass() == vmClasses::String_klass(),
 741          "must be java String");
 742   typeArrayOop value1    = java_lang_String::value_no_keepalive(str1);
 743   bool         is_latin1 = java_lang_String::is_latin1(str1);
 744   typeArrayOop value2    = java_lang_String::value_no_keepalive(str2);
 745   bool         is_latin2 = java_lang_String::is_latin1(str2);
 746 
 747   if (is_latin1 != is_latin2) {
 748     // Strings with different coders are never equal.
 749     return false;
 750   }
 751   return value_equals(value1, value2);
 752 }
 753 
 754 void java_lang_String::print(oop java_string, outputStream* st) {
 755   assert(java_string->klass() == vmClasses::String_klass(), "must be java_string");
 756   typeArrayOop value  = java_lang_String::value_no_keepalive(java_string);
 757 
 758   if (value == nullptr) {
 759     // This can happen if, e.g., printing a String
 760     // object before its initializer has been called
 761     st->print("nullptr");
 762     return;
 763   }
 764 
 765   int length = java_lang_String::length(java_string, value);
 766   bool is_latin1 = java_lang_String::is_latin1(java_string);
 767 
 768   st->print("\"");
 769   for (int index = 0; index < length; index++) {
 770     jchar c = (!is_latin1) ?  value->char_at(index) :
 771                              ((jchar) value->byte_at(index)) & 0xff;
 772     if (c < ' ') {
 773       st->print("\\x%02X", c); // print control characters e.g. \x0A
 774     } else {
 775       st->print("%c", c);
 776     }
 777   }
 778   st->print("\"");
 779 }
 780 
 781 // java_lang_Class
 782 
 783 int java_lang_Class::_klass_offset;
 784 int java_lang_Class::_array_klass_offset;
 785 int java_lang_Class::_oop_size_offset;
 786 int java_lang_Class::_static_oop_field_count_offset;
 787 int java_lang_Class::_class_loader_offset;
 788 int java_lang_Class::_module_offset;
 789 int java_lang_Class::_protection_domain_offset;
 790 int java_lang_Class::_component_mirror_offset;
 791 int java_lang_Class::_signers_offset;
 792 int java_lang_Class::_name_offset;
 793 int java_lang_Class::_source_file_offset;
 794 int java_lang_Class::_classData_offset;
 795 int java_lang_Class::_classRedefinedCount_offset;
 796 
 797 bool java_lang_Class::_offsets_computed = false;
 798 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = nullptr;
 799 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = nullptr;
 800 
 801 #ifdef ASSERT
 802 inline static void assert_valid_static_string_field(fieldDescriptor* fd) {
 803   assert(fd->has_initial_value(), "caller should have checked this");
 804   assert(fd->field_type() == T_OBJECT, "caller should have checked this");
 805   assert(fd->signature() == vmSymbols::string_signature(), "just checking");
 806 }
 807 #endif
 808 
 809 static void initialize_static_string_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
 810   DEBUG_ONLY(assert_valid_static_string_field(fd);)
 811   oop string = fd->string_initial_value(CHECK);
 812   mirror()->obj_field_put(fd->offset(), string);
 813 }
 814 
 815 static void initialize_static_primitive_field(fieldDescriptor* fd, Handle mirror) {
 816   assert(fd->has_initial_value(), "caller should have checked this");
 817   BasicType t = fd->field_type();
 818   switch (t) {
 819   case T_BYTE:
 820     mirror()->byte_field_put(fd->offset(), (jbyte)(fd->int_initial_value()));
 821     break;
 822   case T_BOOLEAN:
 823     mirror()->bool_field_put(fd->offset(), (jboolean)(fd->int_initial_value()));
 824     break;
 825   case T_CHAR:
 826     mirror()->char_field_put(fd->offset(), (jchar)(fd->int_initial_value()));
 827     break;
 828   case T_SHORT:
 829     mirror()->short_field_put(fd->offset(), (jshort)(fd->int_initial_value()));
 830     break;
 831   case T_INT:
 832     mirror()->int_field_put(fd->offset(), fd->int_initial_value());
 833     break;
 834   case T_FLOAT:
 835     mirror()->float_field_put(fd->offset(), fd->float_initial_value());
 836     break;
 837   case T_DOUBLE:
 838     mirror()->double_field_put(fd->offset(), fd->double_initial_value());
 839     break;
 840   case T_LONG:
 841     mirror()->long_field_put(fd->offset(), fd->long_initial_value());
 842     break;
 843   default:
 844     // Illegal ConstantValue attribute in class file should have been
 845     // caught during classfile parsing.
 846     ShouldNotReachHere();
 847   }
 848 }
 849 
 850 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
 851   assert(mirror.not_null() && fd->is_static(), "just checking");
 852   if (fd->has_initial_value()) {
 853     if (fd->field_type() != T_OBJECT) {
 854       initialize_static_primitive_field(fd, mirror);
 855     } else {
 856       initialize_static_string_field(fd, mirror, CHECK);
 857     }
 858   }
 859 }
 860 
 861 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
 862   assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
 863 
 864   // If the offset was read from the shared archive, it was fixed up already
 865   if (!k->is_shared()) {
 866     if (k->is_instance_klass()) {
 867       // During bootstrap, java.lang.Class wasn't loaded so static field
 868       // offsets were computed without the size added it.  Go back and
 869       // update all the static field offsets to included the size.
 870 
 871       // Unfortunately, the FieldInfo stream is encoded with UNSIGNED5 which doesn't allow
 872       // content updates. So the FieldInfo stream has to be decompressed into a temporary array,
 873       // static fields offsets are updated in this array before reencoding everything into
 874       // a new UNSIGNED5 stream, and substitute it to the old FieldInfo stream.
 875 
 876       int java_fields;
 877       int injected_fields;
 878       InstanceKlass* ik = InstanceKlass::cast(k);
 879       GrowableArray<FieldInfo>* fields =
 880         FieldInfoStream::create_FieldInfoArray(ik->fieldinfo_stream(),
 881                                                &java_fields, &injected_fields);
 882       for (int i = 0; i < fields->length(); i++) {
 883         FieldInfo* fi = fields->adr_at(i);
 884         if (fi->access_flags().is_static()) {
 885           fi->set_offset(fi->offset() + InstanceMirrorKlass::offset_of_static_fields());
 886         }
 887       }
 888       Array<u1>* old_stream = ik->fieldinfo_stream();
 889       assert(fields->length() == (java_fields + injected_fields), "Must be");
 890       Array<u1>* new_fis = FieldInfoStream::create_FieldInfoStream(fields, java_fields, injected_fields, k->class_loader_data(), CHECK);
 891       ik->set_fieldinfo_stream(new_fis);
 892       MetadataFactory::free_array<u1>(k->class_loader_data(), old_stream);
 893     }
 894   }
 895 
 896   if (k->is_shared() && k->has_archived_mirror_index()) {
 897     if (ArchiveHeapLoader::is_in_use()) {
 898       bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK);
 899       assert(present, "Missing archived mirror for %s", k->external_name());
 900       return;
 901     } else {
 902       k->clear_java_mirror_handle();
 903       k->clear_archived_mirror_index();
 904     }
 905   }
 906   create_mirror(k, Handle(), Handle(), Handle(), Handle(), CHECK);
 907 }
 908 
 909 void java_lang_Class::initialize_mirror_fields(Klass* k,
 910                                                Handle mirror,
 911                                                Handle protection_domain,
 912                                                Handle classData,
 913                                                TRAPS) {
 914   // Set protection domain also
 915   set_protection_domain(mirror(), protection_domain());
 916 
 917   // Initialize static fields
 918   InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK);
 919 
 920  // Set classData
 921   set_class_data(mirror(), classData());
 922 }
 923 
 924 // Set the java.lang.Module module field in the java_lang_Class mirror
 925 void java_lang_Class::set_mirror_module_field(JavaThread* current, Klass* k, Handle mirror, Handle module) {
 926   if (module.is_null()) {
 927     // During startup, the module may be null only if java.base has not been defined yet.
 928     // Put the class on the fixup_module_list to patch later when the java.lang.Module
 929     // for java.base is known. But note that since we captured the null module another
 930     // thread may have completed that initialization.
 931 
 932     bool javabase_was_defined = false;
 933     {
 934       MutexLocker m1(current, Module_lock);
 935       // Keep list of classes needing java.base module fixup
 936       if (!ModuleEntryTable::javabase_defined()) {
 937         assert(k->java_mirror() != nullptr, "Class's mirror is null");
 938         k->class_loader_data()->inc_keep_alive();
 939         assert(fixup_module_field_list() != nullptr, "fixup_module_field_list not initialized");
 940         fixup_module_field_list()->push(k);
 941       } else {
 942         javabase_was_defined = true;
 943       }
 944     }
 945 
 946     // If java.base was already defined then patch this particular class with java.base.
 947     if (javabase_was_defined) {
 948       ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
 949       assert(javabase_entry != nullptr && javabase_entry->module() != nullptr,
 950              "Setting class module field, " JAVA_BASE_NAME " should be defined");
 951       Handle javabase_handle(current, javabase_entry->module());
 952       set_module(mirror(), javabase_handle());
 953     }
 954   } else {
 955     assert(Universe::is_module_initialized() ||
 956            (ModuleEntryTable::javabase_defined() &&
 957             (module() == ModuleEntryTable::javabase_moduleEntry()->module())),
 958            "Incorrect java.lang.Module specification while creating mirror");
 959     set_module(mirror(), module());
 960   }
 961 }
 962 
 963 // Statically allocate fixup lists because they always get created.
 964 void java_lang_Class::allocate_fixup_lists() {
 965   GrowableArray<Klass*>* mirror_list =
 966     new (mtClass) GrowableArray<Klass*>(40, mtClass);
 967   set_fixup_mirror_list(mirror_list);
 968 
 969   GrowableArray<Klass*>* module_list =
 970     new (mtModule) GrowableArray<Klass*>(500, mtModule);
 971   set_fixup_module_field_list(module_list);
 972 }
 973 
 974 void java_lang_Class::allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData,
 975                                       Handle& mirror, Handle& comp_mirror, TRAPS) {
 976   // Allocate mirror (java.lang.Class instance)
 977   oop mirror_oop = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(k, CHECK);
 978   mirror = Handle(THREAD, mirror_oop);
 979 
 980   // Setup indirection from mirror->klass
 981   set_klass(mirror(), k);
 982 
 983   InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
 984   assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
 985 
 986   set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
 987 
 988   // It might also have a component mirror.  This mirror must already exist.
 989   if (k->is_array_klass()) {
 990     if (k->is_typeArray_klass()) {
 991       BasicType type = TypeArrayKlass::cast(k)->element_type();
 992       if (is_scratch) {
 993         comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(type));
 994       } else {
 995         comp_mirror = Handle(THREAD, Universe::java_mirror(type));
 996       }
 997     } else {
 998       assert(k->is_objArray_klass(), "Must be");
 999       Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1000       assert(element_klass != nullptr, "Must have an element klass");
1001       if (is_scratch) {
1002         comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass));
1003       } else {
1004         comp_mirror = Handle(THREAD, element_klass->java_mirror());
1005       }
1006     }
1007     assert(comp_mirror() != nullptr, "must have a mirror");
1008 
1009     // Two-way link between the array klass and its component mirror:
1010     // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
1011     set_component_mirror(mirror(), comp_mirror());
1012     // See below for ordering dependencies between field array_klass in component mirror
1013     // and java_mirror in this klass.
1014   } else {
1015     assert(k->is_instance_klass(), "Must be");
1016 
1017     initialize_mirror_fields(k, mirror, protection_domain, classData, THREAD);
1018     if (HAS_PENDING_EXCEPTION) {
1019       // If any of the fields throws an exception like OOM remove the klass field
1020       // from the mirror so GC doesn't follow it after the klass has been deallocated.
1021       // This mirror looks like a primitive type, which logically it is because it
1022       // it represents no class.
1023       set_klass(mirror(), nullptr);
1024       return;
1025     }
1026   }
1027 }
1028 
1029 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
1030                                     Handle module, Handle protection_domain,
1031                                     Handle classData, TRAPS) {
1032   assert(k != nullptr, "Use create_basic_type_mirror for primitive types");
1033   assert(k->java_mirror() == nullptr, "should only assign mirror once");
1034 
1035   // Use this moment of initialization to cache modifier_flags also,
1036   // to support Class.getModifiers().  Instance classes recalculate
1037   // the cached flags after the class file is parsed, but before the
1038   // class is put into the system dictionary.
1039   int computed_modifiers = k->compute_modifier_flags();
1040   k->set_modifier_flags(computed_modifiers);
1041   // Class_klass has to be loaded because it is used to allocate
1042   // the mirror.
1043   if (vmClasses::Class_klass_loaded()) {
1044     Handle mirror;
1045     Handle comp_mirror;
1046 
1047     allocate_mirror(k, /*is_scratch=*/false, protection_domain, classData, mirror, comp_mirror, CHECK);
1048 
1049     // set the classLoader field in the java_lang_Class instance
1050     assert(class_loader() == k->class_loader(), "should be same");
1051     set_class_loader(mirror(), class_loader());
1052 
1053     // Setup indirection from klass->mirror
1054     // after any exceptions can happen during allocations.
1055     k->set_java_mirror(mirror);
1056 
1057     // Set the module field in the java_lang_Class instance.  This must be done
1058     // after the mirror is set.
1059     set_mirror_module_field(THREAD, k, mirror, module);
1060 
1061     if (comp_mirror() != nullptr) {
1062       // Set after k->java_mirror() is published, because compiled code running
1063       // concurrently doesn't expect a k to have a null java_mirror.
1064       release_set_array_klass(comp_mirror(), k);
1065     }
1066     if (CDSConfig::is_dumping_heap()) {
1067       create_scratch_mirror(k, CHECK);
1068     }
1069   } else {
1070     assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1071     fixup_mirror_list()->push(k);
1072   }
1073 }
1074 
1075 #if INCLUDE_CDS_JAVA_HEAP
1076 // The "scratch mirror" stores the states of the mirror object that can be
1077 // decided at dump time (such as the initial values of the static fields, the
1078 // component mirror, etc). At runtime, more information is added to it by
1079 // java_lang_Class::restore_archived_mirror().
1080 //
1081 // Essentially, /*dumptime*/create_scratch_mirror() + /*runtime*/restore_archived_mirror()
1082 // produces the same result as /*runtime*/create_mirror().
1083 //
1084 // Note: we archive the "scratch mirror" instead of k->java_mirror(), because the
1085 // latter may contain dumptime-specific information that cannot be archived
1086 // (e.g., ClassLoaderData*, or static fields that are modified by Java code execution).
1087 void java_lang_Class::create_scratch_mirror(Klass* k, TRAPS) {
1088   if (k->class_loader() != nullptr &&
1089       k->class_loader() != SystemDictionary::java_platform_loader() &&
1090       k->class_loader() != SystemDictionary::java_system_loader()) {
1091     // We only archive the mirrors of classes loaded by the built-in loaders
1092     return;
1093   }
1094 
1095   Handle protection_domain, classData; // set to null. Will be reinitialized at runtime
1096   Handle mirror;
1097   Handle comp_mirror;
1098   allocate_mirror(k, /*is_scratch=*/true, protection_domain, classData, mirror, comp_mirror, CHECK);
1099 
1100   if (comp_mirror() != nullptr) {
1101     release_set_array_klass(comp_mirror(), k);
1102   }
1103 
1104   HeapShared::set_scratch_java_mirror(k, mirror());
1105 }
1106 
1107 // Returns true if the mirror is updated, false if no archived mirror
1108 // data is present. After the archived mirror object is restored, the
1109 // shared klass' _has_raw_archived_mirror flag is cleared.
1110 bool java_lang_Class::restore_archived_mirror(Klass *k,
1111                                               Handle class_loader, Handle module,
1112                                               Handle protection_domain, TRAPS) {
1113   // Postpone restoring archived mirror until java.lang.Class is loaded. Please
1114   // see more details in vmClasses::resolve_all().
1115   if (!vmClasses::Class_klass_loaded()) {
1116     assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1117     fixup_mirror_list()->push(k);
1118     return true;
1119   }
1120 
1121   oop m = k->archived_java_mirror();
1122   assert(m != nullptr, "must have stored non-null archived mirror");
1123 
1124   // Sanity: clear it now to prevent re-initialization if any of the following fails
1125   k->clear_archived_mirror_index();
1126 
1127   // mirror is archived, restore
1128   log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1129   assert(as_Klass(m) == k, "must be");
1130   Handle mirror(THREAD, m);
1131 
1132   if (!k->is_array_klass()) {
1133     // - local static final fields with initial values were initialized at dump time
1134 
1135     if (protection_domain.not_null()) {
1136       set_protection_domain(mirror(), protection_domain());
1137     }
1138   }
1139 
1140   assert(class_loader() == k->class_loader(), "should be same");
1141   if (class_loader.not_null()) {
1142     set_class_loader(mirror(), class_loader());
1143   }
1144 
1145   k->set_java_mirror(mirror);
1146 
1147   set_mirror_module_field(THREAD, k, mirror, module);
1148 
1149   if (log_is_enabled(Trace, cds, heap, mirror)) {
1150     ResourceMark rm(THREAD);
1151     log_trace(cds, heap, mirror)(
1152         "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1153   }
1154 
1155   return true;
1156 }
1157 #endif // INCLUDE_CDS_JAVA_HEAP
1158 
1159 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1160   assert(_module_offset != 0, "must have been computed already");
1161   set_module(k->java_mirror(), module());
1162 }
1163 
1164 void java_lang_Class::set_oop_size(HeapWord* java_class, size_t size) {
1165   assert(_oop_size_offset != 0, "must be set");
1166   assert(size > 0, "Oop size must be greater than zero, not " SIZE_FORMAT, size);
1167   assert(size <= INT_MAX, "Lossy conversion: " SIZE_FORMAT, size);
1168   *(int*)(((char*)java_class) + _oop_size_offset) = (int)size;
1169 }
1170 
1171 int  java_lang_Class::static_oop_field_count(oop java_class) {
1172   assert(_static_oop_field_count_offset != 0, "must be set");
1173   return java_class->int_field(_static_oop_field_count_offset);
1174 }
1175 
1176 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1177   assert(_static_oop_field_count_offset != 0, "must be set");
1178   java_class->int_field_put(_static_oop_field_count_offset, size);
1179 }
1180 
1181 oop java_lang_Class::protection_domain(oop java_class) {
1182   assert(_protection_domain_offset != 0, "must be set");
1183   return java_class->obj_field(_protection_domain_offset);
1184 }
1185 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1186   assert(_protection_domain_offset != 0, "must be set");
1187   java_class->obj_field_put(_protection_domain_offset, pd);
1188 }
1189 
1190 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1191   assert(_component_mirror_offset != 0, "must be set");
1192     java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1193   }
1194 oop java_lang_Class::component_mirror(oop java_class) {
1195   assert(_component_mirror_offset != 0, "must be set");
1196   return java_class->obj_field(_component_mirror_offset);
1197 }
1198 
1199 objArrayOop java_lang_Class::signers(oop java_class) {
1200   assert(_signers_offset != 0, "must be set");
1201   return (objArrayOop)java_class->obj_field(_signers_offset);
1202 }
1203 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
1204   assert(_signers_offset != 0, "must be set");
1205   java_class->obj_field_put(_signers_offset, signers);
1206 }
1207 
1208 oop java_lang_Class::class_data(oop java_class) {
1209   assert(_classData_offset != 0, "must be set");
1210   return java_class->obj_field(_classData_offset);
1211 }
1212 void java_lang_Class::set_class_data(oop java_class, oop class_data) {
1213   assert(_classData_offset != 0, "must be set");
1214   java_class->obj_field_put(_classData_offset, class_data);
1215 }
1216 
1217 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1218   assert(_class_loader_offset != 0, "offsets should have been initialized");
1219   java_class->obj_field_put(_class_loader_offset, loader);
1220 }
1221 
1222 oop java_lang_Class::class_loader(oop java_class) {
1223   assert(_class_loader_offset != 0, "must be set");
1224   return java_class->obj_field(_class_loader_offset);
1225 }
1226 
1227 oop java_lang_Class::module(oop java_class) {
1228   assert(_module_offset != 0, "must be set");
1229   return java_class->obj_field(_module_offset);
1230 }
1231 
1232 void java_lang_Class::set_module(oop java_class, oop module) {
1233   assert(_module_offset != 0, "must be set");
1234   java_class->obj_field_put(_module_offset, module);
1235 }
1236 
1237 oop java_lang_Class::name(Handle java_class, TRAPS) {
1238   assert(_name_offset != 0, "must be set");
1239   oop o = java_class->obj_field(_name_offset);
1240   if (o == nullptr) {
1241     o = StringTable::intern(as_external_name(java_class()), THREAD);
1242     java_class->obj_field_put(_name_offset, o);
1243   }
1244   return o;
1245 }
1246 
1247 oop java_lang_Class::source_file(oop java_class) {
1248   assert(_source_file_offset != 0, "must be set");
1249   return java_class->obj_field(_source_file_offset);
1250 }
1251 
1252 void java_lang_Class::set_source_file(oop java_class, oop source_file) {
1253   assert(_source_file_offset != 0, "must be set");
1254   java_class->obj_field_put(_source_file_offset, source_file);
1255 }
1256 
1257 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1258   // This should be improved by adding a field at the Java level or by
1259   // introducing a new VM klass (see comment in ClassFileParser)
1260   oop java_class = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(nullptr, CHECK_NULL);
1261   if (type != T_VOID) {
1262     Klass* aklass = Universe::typeArrayKlassObj(type);
1263     assert(aklass != nullptr, "correct bootstrap");
1264     release_set_array_klass(java_class, aklass);
1265   }
1266 #ifdef ASSERT
1267   InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(vmClasses::Class_klass());
1268   assert(static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1269 #endif
1270   return java_class;
1271 }
1272 
1273 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1274   assert(is_instance(java_class), "must be a Class object");
1275   java_class->metadata_field_put(_klass_offset, klass);
1276 }
1277 
1278 
1279 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1280   assert(is_instance(java_class), "must be a Class object");
1281   Symbol* name = nullptr;
1282   bool is_instance = false;
1283   if (is_primitive(java_class)) {
1284     name = vmSymbols::type_signature(primitive_type(java_class));
1285   } else {
1286     Klass* k = as_Klass(java_class);
1287     is_instance = k->is_instance_klass();
1288     name = k->name();
1289   }
1290   if (name == nullptr) {
1291     st->print("<null>");
1292     return;
1293   }
1294   if (is_instance)  st->print("L");
1295   st->write((char*) name->base(), (int) name->utf8_length());
1296   if (is_instance)  st->print(";");
1297 }
1298 
1299 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) {
1300   assert(is_instance(java_class), "must be a Class object");
1301   Symbol* name;
1302   if (is_primitive(java_class)) {
1303     name = vmSymbols::type_signature(primitive_type(java_class));
1304     // Because this can create a new symbol, the caller has to decrement
1305     // the refcount, so make adjustment here and below for symbols returned
1306     // that are not created or incremented due to a successful lookup.
1307     name->increment_refcount();
1308   } else {
1309     Klass* k = as_Klass(java_class);
1310     if (!k->is_instance_klass()) {
1311       name = k->name();
1312       name->increment_refcount();
1313     } else {
1314       ResourceMark rm;
1315       const char* sigstr = k->signature_name();
1316       int         siglen = (int) strlen(sigstr);
1317       if (!intern_if_not_found) {
1318         name = SymbolTable::probe(sigstr, siglen);
1319       } else {
1320         name = SymbolTable::new_symbol(sigstr, siglen);
1321       }
1322     }
1323   }
1324   return name;
1325 }
1326 
1327 // Returns the Java name for this Java mirror (Resource allocated)
1328 // See Klass::external_name().
1329 // For primitive type Java mirrors, its type name is returned.
1330 const char* java_lang_Class::as_external_name(oop java_class) {
1331   assert(is_instance(java_class), "must be a Class object");
1332   const char* name = nullptr;
1333   if (is_primitive(java_class)) {
1334     name = type2name(primitive_type(java_class));
1335   } else {
1336     name = as_Klass(java_class)->external_name();
1337   }
1338   if (name == nullptr) {
1339     name = "<null>";
1340   }
1341   return name;
1342 }
1343 
1344 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1345   Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1346   assert(k == nullptr || (k->is_klass() && k->is_array_klass()), "should be array klass");
1347   return k;
1348 }
1349 
1350 
1351 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1352   assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1353   java_class->release_metadata_field_put(_array_klass_offset, klass);
1354 }
1355 
1356 
1357 BasicType java_lang_Class::primitive_type(oop java_class) {
1358   assert(is_primitive(java_class), "just checking");
1359   Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1360   BasicType type = T_VOID;
1361   if (ak != nullptr) {
1362     // Note: create_basic_type_mirror above initializes ak to a non-null value.
1363     type = ArrayKlass::cast(ak)->element_type();
1364   } else {
1365     assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
1366   }
1367 #ifdef ASSERT
1368   if (CDSConfig::is_dumping_heap()) {
1369     oop mirror = Universe::java_mirror(type);
1370     oop scratch_mirror = HeapShared::scratch_java_mirror(type);
1371     assert(java_class == mirror || java_class == scratch_mirror, "must be consistent");
1372   } else {
1373     assert(Universe::java_mirror(type) == java_class, "must be consistent");
1374   }
1375 #endif
1376   return type;
1377 }
1378 
1379 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1380   assert(is_instance(java_class), "must be a Class object");
1381   if (is_primitive(java_class)) {
1382     if (reference_klass != nullptr)
1383       (*reference_klass) = nullptr;
1384     return primitive_type(java_class);
1385   } else {
1386     if (reference_klass != nullptr)
1387       (*reference_klass) = as_Klass(java_class);
1388     return T_OBJECT;
1389   }
1390 }
1391 
1392 
1393 oop java_lang_Class::primitive_mirror(BasicType t) {
1394   oop mirror = Universe::java_mirror(t);
1395   assert(mirror != nullptr && mirror->is_a(vmClasses::Class_klass()), "must be a Class");
1396   assert(is_primitive(mirror), "must be primitive");
1397   return mirror;
1398 }
1399 
1400 #define CLASS_FIELDS_DO(macro) \
1401   macro(_classRedefinedCount_offset, k, "classRedefinedCount", int_signature,         false); \
1402   macro(_class_loader_offset,        k, "classLoader",         classloader_signature, false); \
1403   macro(_component_mirror_offset,    k, "componentType",       class_signature,       false); \
1404   macro(_module_offset,              k, "module",              module_signature,      false); \
1405   macro(_name_offset,                k, "name",                string_signature,      false); \
1406   macro(_classData_offset,           k, "classData",           object_signature,      false);
1407 
1408 void java_lang_Class::compute_offsets() {
1409   if (_offsets_computed) {
1410     return;
1411   }
1412 
1413   _offsets_computed = true;
1414 
1415   InstanceKlass* k = vmClasses::Class_klass();
1416   CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1417 
1418   CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1419 }
1420 
1421 #if INCLUDE_CDS
1422 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1423   f->do_bool(&_offsets_computed);
1424 
1425   CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1426 
1427   CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1428 }
1429 #endif
1430 
1431 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1432   assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1433   return the_class_mirror->int_field(_classRedefinedCount_offset);
1434 }
1435 
1436 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1437   assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1438   the_class_mirror->int_field_put(_classRedefinedCount_offset, value);
1439 }
1440 
1441 
1442 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1443 //       platform thread structure, and a eetop offset which was used for thread
1444 //       local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1445 //       merged, so in the HotSpot VM we just use the eetop field for the thread
1446 //       instead of the privateInfo_offset.
1447 //
1448 // Note: The stackSize field is only present starting in 1.4.
1449 
1450 int java_lang_Thread_FieldHolder::_group_offset;
1451 int java_lang_Thread_FieldHolder::_priority_offset;
1452 int java_lang_Thread_FieldHolder::_stackSize_offset;
1453 int java_lang_Thread_FieldHolder::_daemon_offset;
1454 int java_lang_Thread_FieldHolder::_thread_status_offset;
1455 
1456 #define THREAD_FIELD_HOLDER_FIELDS_DO(macro) \
1457   macro(_group_offset,         k, vmSymbols::group_name(),    threadgroup_signature, false); \
1458   macro(_priority_offset,      k, vmSymbols::priority_name(), int_signature,         false); \
1459   macro(_stackSize_offset,     k, "stackSize",                long_signature,        false); \
1460   macro(_daemon_offset,        k, vmSymbols::daemon_name(),   bool_signature,        false); \
1461   macro(_thread_status_offset, k, "threadStatus",             int_signature,         false)
1462 
1463 void java_lang_Thread_FieldHolder::compute_offsets() {
1464   assert(_group_offset == 0, "offsets should be initialized only once");
1465 
1466   InstanceKlass* k = vmClasses::Thread_FieldHolder_klass();
1467   THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1468 }
1469 
1470 #if INCLUDE_CDS
1471 void java_lang_Thread_FieldHolder::serialize_offsets(SerializeClosure* f) {
1472   THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1473 }
1474 #endif
1475 
1476 oop java_lang_Thread_FieldHolder::threadGroup(oop holder) {
1477   return holder->obj_field(_group_offset);
1478 }
1479 
1480 ThreadPriority java_lang_Thread_FieldHolder::priority(oop holder) {
1481   return (ThreadPriority)holder->int_field(_priority_offset);
1482 }
1483 
1484 void java_lang_Thread_FieldHolder::set_priority(oop holder, ThreadPriority priority) {
1485   holder->int_field_put(_priority_offset, priority);
1486 }
1487 
1488 jlong java_lang_Thread_FieldHolder::stackSize(oop holder) {
1489   return holder->long_field(_stackSize_offset);
1490 }
1491 
1492 bool java_lang_Thread_FieldHolder::is_daemon(oop holder) {
1493   return holder->bool_field(_daemon_offset) != 0;
1494 }
1495 
1496 void java_lang_Thread_FieldHolder::set_daemon(oop holder, bool val) {
1497   assert(val, "daemon status is never turned off");
1498   holder->bool_field_put(_daemon_offset, val);
1499 }
1500 
1501 void java_lang_Thread_FieldHolder::set_thread_status(oop holder, JavaThreadStatus status) {
1502   holder->int_field_put(_thread_status_offset, static_cast<int>(status));
1503 }
1504 
1505 JavaThreadStatus java_lang_Thread_FieldHolder::get_thread_status(oop holder) {
1506   return static_cast<JavaThreadStatus>(holder->int_field(_thread_status_offset));
1507 }
1508 
1509 
1510 int java_lang_Thread_Constants::_static_VTHREAD_GROUP_offset = 0;
1511 
1512 #define THREAD_CONSTANTS_STATIC_FIELDS_DO(macro) \
1513   macro(_static_VTHREAD_GROUP_offset,             k, "VTHREAD_GROUP",             threadgroup_signature, true);
1514 
1515 void java_lang_Thread_Constants::compute_offsets() {
1516   assert(_static_VTHREAD_GROUP_offset == 0, "offsets should be initialized only once");
1517 
1518   InstanceKlass* k = vmClasses::Thread_Constants_klass();
1519   THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1520 }
1521 
1522 #if INCLUDE_CDS
1523 void java_lang_Thread_Constants::serialize_offsets(SerializeClosure* f) {
1524   THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1525 }
1526 #endif
1527 
1528 oop java_lang_Thread_Constants::get_VTHREAD_GROUP() {
1529   InstanceKlass* k = vmClasses::Thread_Constants_klass();
1530   oop base = k->static_field_base_raw();
1531   return base->obj_field(_static_VTHREAD_GROUP_offset);
1532 }
1533 
1534 
1535 int java_lang_Thread::_holder_offset;
1536 int java_lang_Thread::_name_offset;
1537 int java_lang_Thread::_contextClassLoader_offset;
1538 int java_lang_Thread::_inheritedAccessControlContext_offset;
1539 int java_lang_Thread::_eetop_offset;
1540 int java_lang_Thread::_jvmti_thread_state_offset;
1541 int java_lang_Thread::_jvmti_VTMS_transition_disable_count_offset;
1542 int java_lang_Thread::_jvmti_is_in_VTMS_transition_offset;
1543 int java_lang_Thread::_interrupted_offset;
1544 int java_lang_Thread::_interruptLock_offset;
1545 int java_lang_Thread::_tid_offset;
1546 int java_lang_Thread::_continuation_offset;
1547 int java_lang_Thread::_park_blocker_offset;
1548 int java_lang_Thread::_scopedValueBindings_offset;
1549 JFR_ONLY(int java_lang_Thread::_jfr_epoch_offset;)
1550 
1551 #define THREAD_FIELDS_DO(macro) \
1552   macro(_holder_offset,        k, "holder", thread_fieldholder_signature, false); \
1553   macro(_name_offset,          k, vmSymbols::name_name(), string_signature, false); \
1554   macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \
1555   macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \
1556   macro(_eetop_offset,         k, "eetop", long_signature, false); \
1557   macro(_interrupted_offset,   k, "interrupted", bool_signature, false); \
1558   macro(_interruptLock_offset, k, "interruptLock", object_signature, false); \
1559   macro(_tid_offset,           k, "tid", long_signature, false); \
1560   macro(_park_blocker_offset,  k, "parkBlocker", object_signature, false); \
1561   macro(_continuation_offset,  k, "cont", continuation_signature, false); \
1562   macro(_scopedValueBindings_offset, k, "scopedValueBindings", object_signature, false);
1563 
1564 void java_lang_Thread::compute_offsets() {
1565   assert(_holder_offset == 0, "offsets should be initialized only once");
1566 
1567   InstanceKlass* k = vmClasses::Thread_klass();
1568   THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1569   THREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1570 }
1571 
1572 #if INCLUDE_CDS
1573 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1574   THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1575   THREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1576 }
1577 #endif
1578 
1579 JavaThread* java_lang_Thread::thread(oop java_thread) {
1580   return reinterpret_cast<JavaThread*>(java_thread->address_field(_eetop_offset));
1581 }
1582 
1583 JavaThread* java_lang_Thread::thread_acquire(oop java_thread) {
1584   return reinterpret_cast<JavaThread*>(java_thread->address_field_acquire(_eetop_offset));
1585 }
1586 
1587 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1588   java_thread->address_field_put(_eetop_offset, (address)thread);
1589 }
1590 
1591 void java_lang_Thread::release_set_thread(oop java_thread, JavaThread* thread) {
1592   java_thread->release_address_field_put(_eetop_offset, (address)thread);
1593 }
1594 
1595 JvmtiThreadState* java_lang_Thread::jvmti_thread_state(oop java_thread) {
1596   return (JvmtiThreadState*)java_thread->address_field(_jvmti_thread_state_offset);
1597 }
1598 
1599 void java_lang_Thread::set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state) {
1600   java_thread->address_field_put(_jvmti_thread_state_offset, (address)state);
1601 }
1602 
1603 int java_lang_Thread::VTMS_transition_disable_count(oop java_thread) {
1604   return java_thread->int_field(_jvmti_VTMS_transition_disable_count_offset);
1605 }
1606 
1607 void java_lang_Thread::inc_VTMS_transition_disable_count(oop java_thread) {
1608   assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1609   int val = VTMS_transition_disable_count(java_thread);
1610   java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val + 1);
1611 }
1612 
1613 void java_lang_Thread::dec_VTMS_transition_disable_count(oop java_thread) {
1614   assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1615   int val = VTMS_transition_disable_count(java_thread);
1616   assert(val > 0, "VTMS_transition_disable_count should never be negative");
1617   java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val - 1);
1618 }
1619 
1620 bool java_lang_Thread::is_in_VTMS_transition(oop java_thread) {
1621   return java_thread->bool_field_volatile(_jvmti_is_in_VTMS_transition_offset);
1622 }
1623 
1624 void java_lang_Thread::set_is_in_VTMS_transition(oop java_thread, bool val) {
1625   java_thread->bool_field_put_volatile(_jvmti_is_in_VTMS_transition_offset, val);
1626 }
1627 
1628 int java_lang_Thread::is_in_VTMS_transition_offset() {
1629   return _jvmti_is_in_VTMS_transition_offset;
1630 }
1631 
1632 void java_lang_Thread::clear_scopedValueBindings(oop java_thread) {
1633   assert(java_thread != nullptr, "need a java_lang_Thread pointer here");
1634   java_thread->obj_field_put(_scopedValueBindings_offset, nullptr);
1635 }
1636 
1637 oop java_lang_Thread::holder(oop java_thread) {
1638   // Note: may return null if the thread is still attaching
1639   return java_thread->obj_field(_holder_offset);
1640 }
1641 oop java_lang_Thread::interrupt_lock(oop java_thread) {
1642   return java_thread->obj_field(_interruptLock_offset);
1643 }
1644 
1645 bool java_lang_Thread::interrupted(oop java_thread) {
1646   // Make sure the caller can safely access oops.
1647   assert(Thread::current()->is_VM_thread() ||
1648          (JavaThread::current()->thread_state() != _thread_blocked &&
1649           JavaThread::current()->thread_state() != _thread_in_native),
1650          "Unsafe access to oop");
1651   return java_thread->bool_field_volatile(_interrupted_offset);
1652 }
1653 
1654 void java_lang_Thread::set_interrupted(oop java_thread, bool val) {
1655   // Make sure the caller can safely access oops.
1656   assert(Thread::current()->is_VM_thread() ||
1657          (JavaThread::current()->thread_state() != _thread_blocked &&
1658           JavaThread::current()->thread_state() != _thread_in_native),
1659          "Unsafe access to oop");
1660   java_thread->bool_field_put_volatile(_interrupted_offset, val);
1661 }
1662 
1663 
1664 oop java_lang_Thread::name(oop java_thread) {
1665   return java_thread->obj_field(_name_offset);
1666 }
1667 
1668 
1669 void java_lang_Thread::set_name(oop java_thread, oop name) {
1670   java_thread->obj_field_put(_name_offset, name);
1671 }
1672 
1673 // Convenience macros for setting and getting Thread fields that
1674 // are actually stored in the FieldHolder object of the thread.
1675 // The FieldHolder can be null whilst a thread is attaching via
1676 // JNI, and when the main thread is attaching.
1677 
1678 // The default value should be the default/zero initialized value
1679 // of the field as it would be in java.lang.Thread.FieldHolder.
1680 #define GET_FIELDHOLDER_FIELD(java_thread, field, default_val)  \
1681   {                                                             \
1682     oop holder = java_lang_Thread::holder(java_thread);         \
1683     if (holder != nullptr)                                      \
1684       return java_lang_Thread_FieldHolder::field(holder);       \
1685     else                                                        \
1686       return default_val;                                       \
1687   }
1688 
1689 // We should never be trying to set a field of an attaching thread.
1690 #define SET_FIELDHOLDER_FIELD(java_thread, field, value)        \
1691   {                                                             \
1692     oop holder = java_lang_Thread::holder(java_thread);         \
1693     assert(holder != nullptr, "Thread not fully initialized");  \
1694     java_lang_Thread_FieldHolder::set_##field(holder, value);   \
1695   }
1696 
1697 
1698 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1699   GET_FIELDHOLDER_FIELD(java_thread, priority, (ThreadPriority)0);
1700 }
1701 
1702 
1703 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1704   SET_FIELDHOLDER_FIELD(java_thread, priority, priority)
1705 }
1706 
1707 
1708 oop java_lang_Thread::threadGroup(oop java_thread) {
1709   GET_FIELDHOLDER_FIELD(java_thread, threadGroup, nullptr);
1710 }
1711 
1712 
1713 bool java_lang_Thread::is_alive(oop java_thread) {
1714   JavaThread* thr = java_lang_Thread::thread(java_thread);
1715   return (thr != nullptr);
1716 }
1717 
1718 
1719 bool java_lang_Thread::is_daemon(oop java_thread) {
1720   GET_FIELDHOLDER_FIELD(java_thread, is_daemon, false);
1721 }
1722 
1723 
1724 void java_lang_Thread::set_daemon(oop java_thread) {
1725   SET_FIELDHOLDER_FIELD(java_thread, daemon, true);
1726 }
1727 
1728 oop java_lang_Thread::context_class_loader(oop java_thread) {
1729   return java_thread->obj_field(_contextClassLoader_offset);
1730 }
1731 
1732 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1733   return java_thread->obj_field(_inheritedAccessControlContext_offset);
1734 }
1735 
1736 
1737 jlong java_lang_Thread::stackSize(oop java_thread) {
1738   GET_FIELDHOLDER_FIELD(java_thread, stackSize, 0);
1739 }
1740 
1741 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1742 void java_lang_Thread::set_thread_status(oop java_thread, JavaThreadStatus status) {
1743   SET_FIELDHOLDER_FIELD(java_thread, thread_status, status);
1744 }
1745 
1746 // Read thread status value from threadStatus field in java.lang.Thread java class.
1747 JavaThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1748   // Make sure the caller is operating on behalf of the VM or is
1749   // running VM code (state == _thread_in_vm).
1750   assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1751          JavaThread::current()->thread_state() == _thread_in_vm,
1752          "Java Thread is not running in vm");
1753   GET_FIELDHOLDER_FIELD(java_thread, get_thread_status, JavaThreadStatus::NEW /* not initialized */);
1754 }
1755 
1756 ByteSize java_lang_Thread::thread_id_offset() {
1757   return in_ByteSize(_tid_offset);
1758 }
1759 
1760 oop java_lang_Thread::park_blocker(oop java_thread) {
1761   return java_thread->obj_field(_park_blocker_offset);
1762 }
1763 
1764 oop java_lang_Thread::async_get_stack_trace(oop java_thread, TRAPS) {
1765   ThreadsListHandle tlh(JavaThread::current());
1766   JavaThread* thread;
1767   bool is_virtual = java_lang_VirtualThread::is_instance(java_thread);
1768   if (is_virtual) {
1769     oop carrier_thread = java_lang_VirtualThread::carrier_thread(java_thread);
1770     if (carrier_thread == nullptr) {
1771       return nullptr;
1772     }
1773     thread = java_lang_Thread::thread(carrier_thread);
1774   } else {
1775     thread = java_lang_Thread::thread(java_thread);
1776   }
1777   if (thread == nullptr) {
1778     return nullptr;
1779   }
1780 
1781   class GetStackTraceClosure : public HandshakeClosure {
1782   public:
1783     const Handle _java_thread;
1784     int _depth;
1785     bool _retry_handshake;
1786     GrowableArray<Method*>* _methods;
1787     GrowableArray<int>*     _bcis;
1788 
1789     GetStackTraceClosure(Handle java_thread) :
1790         HandshakeClosure("GetStackTraceClosure"), _java_thread(java_thread), _depth(0), _retry_handshake(false),
1791         _methods(nullptr), _bcis(nullptr) {
1792     }
1793     ~GetStackTraceClosure() {
1794       delete _methods;
1795       delete _bcis;
1796     }
1797 
1798     bool read_reset_retry() {
1799       bool ret = _retry_handshake;
1800       // If we re-execute the handshake this method need to return false
1801       // when the handshake cannot be performed. (E.g. thread terminating)
1802       _retry_handshake = false;
1803       return ret;
1804     }
1805 
1806     void do_thread(Thread* th) {
1807       if (!Thread::current()->is_Java_thread()) {
1808         _retry_handshake = true;
1809         return;
1810       }
1811 
1812       JavaThread* thread = JavaThread::cast(th);
1813 
1814       if (!thread->has_last_Java_frame()) {
1815         return;
1816       }
1817 
1818       bool carrier = false;
1819       if (java_lang_VirtualThread::is_instance(_java_thread())) {
1820         // if (thread->vthread() != _java_thread()) // We might be inside a System.executeOnCarrierThread
1821         const ContinuationEntry* ce = thread->vthread_continuation();
1822         if (ce == nullptr || ce->cont_oop(thread) != java_lang_VirtualThread::continuation(_java_thread())) {
1823           return; // not mounted
1824         }
1825       } else {
1826         carrier = (thread->vthread_continuation() != nullptr);
1827       }
1828 
1829       const int max_depth = MaxJavaStackTraceDepth;
1830       const bool skip_hidden = !ShowHiddenFrames;
1831 
1832       // Pick minimum length that will cover most cases
1833       int init_length = 64;
1834       _methods = new (mtInternal) GrowableArray<Method*>(init_length, mtInternal);
1835       _bcis = new (mtInternal) GrowableArray<int>(init_length, mtInternal);
1836 
1837       int total_count = 0;
1838       for (vframeStream vfst(thread, false, false, carrier); // we don't process frames as we don't care about oops
1839            !vfst.at_end() && (max_depth == 0 || max_depth != total_count);
1840            vfst.next()) {
1841 
1842         if (skip_hidden && (vfst.method()->is_hidden() ||
1843                             vfst.method()->is_continuation_enter_intrinsic())) {
1844           continue;
1845         }
1846 
1847         _methods->push(vfst.method());
1848         _bcis->push(vfst.bci());
1849         total_count++;
1850       }
1851 
1852       _depth = total_count;
1853     }
1854   };
1855 
1856   // Handshake with target
1857   ResourceMark rm(THREAD);
1858   HandleMark   hm(THREAD);
1859   GetStackTraceClosure gstc(Handle(THREAD, java_thread));
1860   do {
1861    Handshake::execute(&gstc, &tlh, thread);
1862   } while (gstc.read_reset_retry());
1863 
1864   // Stop if no stack trace is found.
1865   if (gstc._depth == 0) {
1866     return nullptr;
1867   }
1868 
1869   // Convert to StackTraceElement array
1870   InstanceKlass* k = vmClasses::StackTraceElement_klass();
1871   assert(k != nullptr, "must be loaded in 1.4+");
1872   if (k->should_be_initialized()) {
1873     k->initialize(CHECK_NULL);
1874   }
1875   objArrayHandle trace = oopFactory::new_objArray_handle(k, gstc._depth, CHECK_NULL);
1876 
1877   for (int i = 0; i < gstc._depth; i++) {
1878     methodHandle method(THREAD, gstc._methods->at(i));
1879     oop element = java_lang_StackTraceElement::create(method,
1880                                                       gstc._bcis->at(i),
1881                                                       CHECK_NULL);
1882     trace->obj_at_put(i, element);
1883   }
1884 
1885   return trace();
1886 }
1887 
1888 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1889   JavaThreadStatus status = get_thread_status(java_thread);
1890   switch (status) {
1891     case JavaThreadStatus::NEW                      : return "NEW";
1892     case JavaThreadStatus::RUNNABLE                 : return "RUNNABLE";
1893     case JavaThreadStatus::SLEEPING                 : return "TIMED_WAITING (sleeping)";
1894     case JavaThreadStatus::IN_OBJECT_WAIT           : return "WAITING (on object monitor)";
1895     case JavaThreadStatus::IN_OBJECT_WAIT_TIMED     : return "TIMED_WAITING (on object monitor)";
1896     case JavaThreadStatus::PARKED                   : return "WAITING (parking)";
1897     case JavaThreadStatus::PARKED_TIMED             : return "TIMED_WAITING (parking)";
1898     case JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1899     case JavaThreadStatus::TERMINATED               : return "TERMINATED";
1900     default                       : return "UNKNOWN";
1901   };
1902 }
1903 int java_lang_ThreadGroup::_parent_offset;
1904 int java_lang_ThreadGroup::_name_offset;
1905 int java_lang_ThreadGroup::_maxPriority_offset;
1906 int java_lang_ThreadGroup::_daemon_offset;
1907 
1908 oop  java_lang_ThreadGroup::parent(oop java_thread_group) {
1909   assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1910   return java_thread_group->obj_field(_parent_offset);
1911 }
1912 
1913 // ("name as oop" accessor is not necessary)
1914 
1915 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
1916   oop name = java_thread_group->obj_field(_name_offset);
1917   // ThreadGroup.name can be null
1918   if (name != nullptr) {
1919     return java_lang_String::as_utf8_string(name);
1920   }
1921   return nullptr;
1922 }
1923 
1924 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1925   assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1926   return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1927 }
1928 
1929 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1930   assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1931   return java_thread_group->bool_field(_daemon_offset) != 0;
1932 }
1933 
1934 #define THREADGROUP_FIELDS_DO(macro) \
1935   macro(_parent_offset,      k, vmSymbols::parent_name(),      threadgroup_signature,         false); \
1936   macro(_name_offset,        k, vmSymbols::name_name(),        string_signature,              false); \
1937   macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature,                 false); \
1938   macro(_daemon_offset,      k, vmSymbols::daemon_name(),      bool_signature,                false);
1939 
1940 void java_lang_ThreadGroup::compute_offsets() {
1941   assert(_parent_offset == 0, "offsets should be initialized only once");
1942 
1943   InstanceKlass* k = vmClasses::ThreadGroup_klass();
1944   THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1945 }
1946 
1947 #if INCLUDE_CDS
1948 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
1949   THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1950 }
1951 #endif
1952 
1953 
1954 // java_lang_VirtualThread
1955 
1956 int java_lang_VirtualThread::static_vthread_scope_offset;
1957 int java_lang_VirtualThread::_carrierThread_offset;
1958 int java_lang_VirtualThread::_continuation_offset;
1959 int java_lang_VirtualThread::_state_offset;
1960 
1961 #define VTHREAD_FIELDS_DO(macro) \
1962   macro(static_vthread_scope_offset,       k, "VTHREAD_SCOPE",      continuationscope_signature, true);  \
1963   macro(_carrierThread_offset,             k, "carrierThread",      thread_signature,            false); \
1964   macro(_continuation_offset,              k, "cont",               continuation_signature,      false); \
1965   macro(_state_offset,                     k, "state",              int_signature,               false)
1966 
1967 
1968 void java_lang_VirtualThread::compute_offsets() {
1969   InstanceKlass* k = vmClasses::VirtualThread_klass();
1970   VTHREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1971 }
1972 
1973 bool java_lang_VirtualThread::is_instance(oop obj) {
1974   return obj != nullptr && is_subclass(obj->klass());
1975 }
1976 
1977 oop java_lang_VirtualThread::carrier_thread(oop vthread) {
1978   oop thread = vthread->obj_field(_carrierThread_offset);
1979   return thread;
1980 }
1981 
1982 oop java_lang_VirtualThread::continuation(oop vthread) {
1983   oop cont = vthread->obj_field(_continuation_offset);
1984   return cont;
1985 }
1986 
1987 int java_lang_VirtualThread::state(oop vthread) {
1988   return vthread->int_field_acquire(_state_offset);
1989 }
1990 
1991 JavaThreadStatus java_lang_VirtualThread::map_state_to_thread_status(int state) {
1992   JavaThreadStatus status = JavaThreadStatus::NEW;
1993   switch (state & ~SUSPENDED) {
1994     case NEW:
1995       status = JavaThreadStatus::NEW;
1996       break;
1997     case STARTED:
1998     case RUNNING:
1999     case PARKING:
2000     case TIMED_PARKING:
2001     case UNPARKED:
2002     case YIELDING:
2003     case YIELDED:
2004       status = JavaThreadStatus::RUNNABLE;
2005       break;
2006     case PARKED:
2007     case PINNED:
2008       status = JavaThreadStatus::PARKED;
2009       break;
2010     case TIMED_PARKED:
2011     case TIMED_PINNED:
2012       status = JavaThreadStatus::PARKED_TIMED;
2013       break;
2014     case TERMINATED:
2015       status = JavaThreadStatus::TERMINATED;
2016       break;
2017     default:
2018       ShouldNotReachHere();
2019   }
2020   return status;
2021 }
2022 
2023 #if INCLUDE_CDS
2024 void java_lang_VirtualThread::serialize_offsets(SerializeClosure* f) {
2025    VTHREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2026 }
2027 #endif
2028 
2029 // java_lang_Throwable
2030 
2031 int java_lang_Throwable::_backtrace_offset;
2032 int java_lang_Throwable::_detailMessage_offset;
2033 int java_lang_Throwable::_stackTrace_offset;
2034 int java_lang_Throwable::_depth_offset;
2035 int java_lang_Throwable::_cause_offset;
2036 int java_lang_Throwable::_static_unassigned_stacktrace_offset;
2037 
2038 #define THROWABLE_FIELDS_DO(macro) \
2039   macro(_backtrace_offset,     k, "backtrace",     object_signature,                  false); \
2040   macro(_detailMessage_offset, k, "detailMessage", string_signature,                  false); \
2041   macro(_stackTrace_offset,    k, "stackTrace",    java_lang_StackTraceElement_array, false); \
2042   macro(_depth_offset,         k, "depth",         int_signature,                     false); \
2043   macro(_cause_offset,         k, "cause",         throwable_signature,               false); \
2044   macro(_static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
2045 
2046 void java_lang_Throwable::compute_offsets() {
2047   InstanceKlass* k = vmClasses::Throwable_klass();
2048   THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2049 }
2050 
2051 #if INCLUDE_CDS
2052 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
2053   THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2054 }
2055 #endif
2056 
2057 oop java_lang_Throwable::unassigned_stacktrace() {
2058   InstanceKlass* ik = vmClasses::Throwable_klass();
2059   oop base = ik->static_field_base_raw();
2060   return base->obj_field(_static_unassigned_stacktrace_offset);
2061 }
2062 
2063 oop java_lang_Throwable::backtrace(oop throwable) {
2064   return throwable->obj_field_acquire(_backtrace_offset);
2065 }
2066 
2067 
2068 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
2069   throwable->release_obj_field_put(_backtrace_offset, value);
2070 }
2071 
2072 int java_lang_Throwable::depth(oop throwable) {
2073   return throwable->int_field(_depth_offset);
2074 }
2075 
2076 void java_lang_Throwable::set_depth(oop throwable, int value) {
2077   throwable->int_field_put(_depth_offset, value);
2078 }
2079 
2080 oop java_lang_Throwable::message(oop throwable) {
2081   return throwable->obj_field(_detailMessage_offset);
2082 }
2083 
2084 oop java_lang_Throwable::cause(oop throwable) {
2085   return throwable->obj_field(_cause_offset);
2086 }
2087 
2088 // Return Symbol for detailed_message or null
2089 Symbol* java_lang_Throwable::detail_message(oop throwable) {
2090   PreserveExceptionMark pm(Thread::current());
2091   oop detailed_message = java_lang_Throwable::message(throwable);
2092   if (detailed_message != nullptr) {
2093     return java_lang_String::as_symbol(detailed_message);
2094   }
2095   return nullptr;
2096 }
2097 
2098 void java_lang_Throwable::set_message(oop throwable, oop value) {
2099   throwable->obj_field_put(_detailMessage_offset, value);
2100 }
2101 
2102 
2103 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
2104   throwable->obj_field_put(_stackTrace_offset, st_element_array);
2105 }
2106 
2107 void java_lang_Throwable::clear_stacktrace(oop throwable) {
2108   set_stacktrace(throwable, nullptr);
2109 }
2110 
2111 
2112 void java_lang_Throwable::print(oop throwable, outputStream* st) {
2113   ResourceMark rm;
2114   Klass* k = throwable->klass();
2115   assert(k != nullptr, "just checking");
2116   st->print("%s", k->external_name());
2117   oop msg = message(throwable);
2118   if (msg != nullptr) {
2119     st->print(": %s", java_lang_String::as_utf8_string(msg));
2120   }
2121 }
2122 
2123 // After this many redefines, the stack trace is unreliable.
2124 const int MAX_VERSION = USHRT_MAX;
2125 
2126 static inline bool version_matches(Method* method, int version) {
2127   assert(version < MAX_VERSION, "version is too big");
2128   return method != nullptr && (method->constants()->version() == version);
2129 }
2130 
2131 // This class provides a simple wrapper over the internal structure of
2132 // exception backtrace to insulate users of the backtrace from needing
2133 // to know what it looks like.
2134 // The code of this class is not GC safe. Allocations can only happen
2135 // in expand().
2136 class BacktraceBuilder: public StackObj {
2137  friend class BacktraceIterator;
2138  private:
2139   Handle          _backtrace;
2140   objArrayOop     _head;
2141   typeArrayOop    _methods;
2142   typeArrayOop    _bcis;
2143   objArrayOop     _mirrors;
2144   typeArrayOop    _names; // Needed to insulate method name against redefinition.
2145   // True if the top frame of the backtrace is omitted because it shall be hidden.
2146   bool            _has_hidden_top_frame;
2147   int             _index;
2148   NoSafepointVerifier _nsv;
2149 
2150   enum {
2151     trace_methods_offset = java_lang_Throwable::trace_methods_offset,
2152     trace_bcis_offset    = java_lang_Throwable::trace_bcis_offset,
2153     trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
2154     trace_names_offset   = java_lang_Throwable::trace_names_offset,
2155     trace_conts_offset   = java_lang_Throwable::trace_conts_offset,
2156     trace_next_offset    = java_lang_Throwable::trace_next_offset,
2157     trace_hidden_offset  = java_lang_Throwable::trace_hidden_offset,
2158     trace_size           = java_lang_Throwable::trace_size,
2159     trace_chunk_size     = java_lang_Throwable::trace_chunk_size
2160   };
2161 
2162   // get info out of chunks
2163   static typeArrayOop get_methods(objArrayHandle chunk) {
2164     typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
2165     assert(methods != nullptr, "method array should be initialized in backtrace");
2166     return methods;
2167   }
2168   static typeArrayOop get_bcis(objArrayHandle chunk) {
2169     typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
2170     assert(bcis != nullptr, "bci array should be initialized in backtrace");
2171     return bcis;
2172   }
2173   static objArrayOop get_mirrors(objArrayHandle chunk) {
2174     objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
2175     assert(mirrors != nullptr, "mirror array should be initialized in backtrace");
2176     return mirrors;
2177   }
2178   static typeArrayOop get_names(objArrayHandle chunk) {
2179     typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2180     assert(names != nullptr, "names array should be initialized in backtrace");
2181     return names;
2182   }
2183   static bool has_hidden_top_frame(objArrayHandle chunk) {
2184     oop hidden = chunk->obj_at(trace_hidden_offset);
2185     return hidden != nullptr;
2186   }
2187 
2188  public:
2189 
2190   // constructor for new backtrace
2191   BacktraceBuilder(TRAPS): _head(nullptr), _methods(nullptr), _bcis(nullptr), _mirrors(nullptr), _names(nullptr), _has_hidden_top_frame(false) {
2192     expand(CHECK);
2193     _backtrace = Handle(THREAD, _head);
2194     _index = 0;
2195   }
2196 
2197   BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2198     _methods = get_methods(backtrace);
2199     _bcis = get_bcis(backtrace);
2200     _mirrors = get_mirrors(backtrace);
2201     _names = get_names(backtrace);
2202     _has_hidden_top_frame = has_hidden_top_frame(backtrace);
2203     assert(_methods->length() == _bcis->length() &&
2204            _methods->length() == _mirrors->length() &&
2205            _mirrors->length() == _names->length(),
2206            "method and source information arrays should match");
2207 
2208     // head is the preallocated backtrace
2209     _head = backtrace();
2210     _backtrace = Handle(thread, _head);
2211     _index = 0;
2212   }
2213 
2214   void expand(TRAPS) {
2215     objArrayHandle old_head(THREAD, _head);
2216     PauseNoSafepointVerifier pnsv(&_nsv);
2217 
2218     objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2219     objArrayHandle new_head(THREAD, head);
2220 
2221     typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2222     typeArrayHandle new_methods(THREAD, methods);
2223 
2224     typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2225     typeArrayHandle new_bcis(THREAD, bcis);
2226 
2227     objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2228     objArrayHandle new_mirrors(THREAD, mirrors);
2229 
2230     typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2231     typeArrayHandle new_names(THREAD, names);
2232 
2233     if (!old_head.is_null()) {
2234       old_head->obj_at_put(trace_next_offset, new_head());
2235     }
2236     new_head->obj_at_put(trace_methods_offset, new_methods());
2237     new_head->obj_at_put(trace_bcis_offset, new_bcis());
2238     new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2239     new_head->obj_at_put(trace_names_offset, new_names());
2240     new_head->obj_at_put(trace_hidden_offset, nullptr);
2241 
2242     _head    = new_head();
2243     _methods = new_methods();
2244     _bcis = new_bcis();
2245     _mirrors = new_mirrors();
2246     _names  = new_names();
2247     _index = 0;
2248   }
2249 
2250   oop backtrace() {
2251     return _backtrace();
2252   }
2253 
2254   inline void push(Method* method, int bci, TRAPS) {
2255     // Smear the -1 bci to 0 since the array only holds unsigned
2256     // shorts.  The later line number lookup would just smear the -1
2257     // to a 0 even if it could be recorded.
2258     if (bci == SynchronizationEntryBCI) bci = 0;
2259 
2260     if (_index >= trace_chunk_size) {
2261       methodHandle mhandle(THREAD, method);
2262       expand(CHECK);
2263       method = mhandle();
2264     }
2265 
2266     _methods->ushort_at_put(_index, method->orig_method_idnum());
2267     _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2268 
2269     // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2270     // klass owning the symbols alive so their refcounts aren't decremented.
2271     Symbol* name = method->name();
2272     _names->symbol_at_put(_index, name);
2273 
2274     // We need to save the mirrors in the backtrace to keep the class
2275     // from being unloaded while we still have this stack trace.
2276     assert(method->method_holder()->java_mirror() != nullptr, "never push null for mirror");
2277     _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2278 
2279     _index++;
2280   }
2281 
2282   void set_has_hidden_top_frame() {
2283     if (!_has_hidden_top_frame) {
2284       // It would be nice to add java/lang/Boolean::TRUE here
2285       // to indicate that this backtrace has a hidden top frame.
2286       // But this code is used before TRUE is allocated.
2287       // Therefore let's just use an arbitrary legal oop
2288       // available right here. _methods is a short[].
2289       assert(_methods != nullptr, "we need a legal oop");
2290       _has_hidden_top_frame = true;
2291       _head->obj_at_put(trace_hidden_offset, _methods);
2292     }
2293   }
2294 };
2295 
2296 struct BacktraceElement : public StackObj {
2297   int _method_id;
2298   int _bci;
2299   int _version;
2300   Symbol* _name;
2301   Handle _mirror;
2302   BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2303                    _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2304 };
2305 
2306 class BacktraceIterator : public StackObj {
2307   int _index;
2308   objArrayHandle  _result;
2309   objArrayHandle  _mirrors;
2310   typeArrayHandle _methods;
2311   typeArrayHandle _bcis;
2312   typeArrayHandle _names;
2313 
2314   void init(objArrayHandle result, Thread* thread) {
2315     // Get method id, bci, version and mirror from chunk
2316     _result = result;
2317     if (_result.not_null()) {
2318       _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2319       _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2320       _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2321       _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2322       _index = 0;
2323     }
2324   }
2325  public:
2326   BacktraceIterator(objArrayHandle result, Thread* thread) {
2327     init(result, thread);
2328     assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2329   }
2330 
2331   BacktraceElement next(Thread* thread) {
2332     BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2333                         _methods->ushort_at(_index),
2334                         Backtrace::version_at(_bcis->int_at(_index)),
2335                         Backtrace::bci_at(_bcis->int_at(_index)),
2336                         _names->symbol_at(_index));
2337     _index++;
2338 
2339     if (_index >= java_lang_Throwable::trace_chunk_size) {
2340       int next_offset = java_lang_Throwable::trace_next_offset;
2341       // Get next chunk
2342       objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2343       init(result, thread);
2344     }
2345     return e;
2346   }
2347 
2348   bool repeat() {
2349     return _result.not_null() && _mirrors->obj_at(_index) != nullptr;
2350   }
2351 };
2352 
2353 
2354 // Print stack trace element to resource allocated buffer
2355 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2356                                           int version, int bci, Symbol* name) {
2357   ResourceMark rm;
2358 
2359   // Get strings and string lengths
2360   InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2361   const char* klass_name  = holder->external_name();
2362   int buf_len = (int)strlen(klass_name);
2363 
2364   char* method_name = name->as_C_string();
2365   buf_len += (int)strlen(method_name);
2366 
2367   char* source_file_name = nullptr;
2368   Symbol* source = Backtrace::get_source_file_name(holder, version);
2369   if (source != nullptr) {
2370     source_file_name = source->as_C_string();
2371     buf_len += (int)strlen(source_file_name);
2372   }
2373 
2374   char *module_name = nullptr, *module_version = nullptr;
2375   ModuleEntry* module = holder->module();
2376   if (module->is_named()) {
2377     module_name = module->name()->as_C_string();
2378     buf_len += (int)strlen(module_name);
2379     if (module->version() != nullptr) {
2380       module_version = module->version()->as_C_string();
2381       buf_len += (int)strlen(module_version);
2382     }
2383   }
2384 
2385   // Allocate temporary buffer with extra space for formatting and line number
2386   const size_t buf_size = buf_len + 64;
2387   char* buf = NEW_RESOURCE_ARRAY(char, buf_size);
2388 
2389   // Print stack trace line in buffer
2390   size_t buf_off = os::snprintf_checked(buf, buf_size, "\tat %s.%s(", klass_name, method_name);
2391 
2392   // Print module information
2393   if (module_name != nullptr) {
2394     if (module_version != nullptr) {
2395       buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s@%s/", module_name, module_version);
2396     } else {
2397       buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s/", module_name);
2398     }
2399   }
2400 
2401   // The method can be null if the requested class version is gone
2402   Method* method = holder->method_with_orig_idnum(method_id, version);
2403   if (!version_matches(method, version)) {
2404     strcat(buf, "Redefined)");
2405   } else {
2406     int line_number = Backtrace::get_line_number(method, bci);
2407     if (line_number == -2) {
2408       strcat(buf, "Native Method)");
2409     } else {
2410       if (source_file_name != nullptr && (line_number != -1)) {
2411         // Sourcename and linenumber
2412         buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s:%d)", source_file_name, line_number);
2413       } else if (source_file_name != nullptr) {
2414         // Just sourcename
2415         buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s)", source_file_name);
2416       } else {
2417         // Neither sourcename nor linenumber
2418         buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "Unknown Source)");
2419       }
2420       CompiledMethod* nm = method->code();
2421       if (WizardMode && nm != nullptr) {
2422         os::snprintf_checked(buf + buf_off, buf_size - buf_off, "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
2423       }
2424     }
2425   }
2426 
2427   st->print_cr("%s", buf);
2428 }
2429 
2430 void java_lang_Throwable::print_stack_element(outputStream *st, Method* method, int bci) {
2431   Handle mirror (Thread::current(),  method->method_holder()->java_mirror());
2432   int method_id = method->orig_method_idnum();
2433   int version = method->constants()->version();
2434   print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2435 }
2436 
2437 /**
2438  * Print the throwable message and its stack trace plus all causes by walking the
2439  * cause chain.  The output looks the same as of Throwable.printStackTrace().
2440  */
2441 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2442   // First, print the message.
2443   print(throwable(), st);
2444   st->cr();
2445 
2446   // Now print the stack trace.
2447   JavaThread* THREAD = JavaThread::current(); // For exception macros.
2448   while (throwable.not_null()) {
2449     objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2450     if (result.is_null()) {
2451       st->print_raw_cr("\t<<no stack trace available>>");
2452       return;
2453     }
2454     BacktraceIterator iter(result, THREAD);
2455 
2456     while (iter.repeat()) {
2457       BacktraceElement bte = iter.next(THREAD);
2458       print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2459     }
2460     if (THREAD->can_call_java()) {
2461       // Call getCause() which doesn't necessarily return the _cause field.
2462       ExceptionMark em(THREAD);
2463       JavaValue cause(T_OBJECT);
2464       JavaCalls::call_virtual(&cause,
2465                               throwable,
2466                               throwable->klass(),
2467                               vmSymbols::getCause_name(),
2468                               vmSymbols::void_throwable_signature(),
2469                               THREAD);
2470       // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2471       if (HAS_PENDING_EXCEPTION) {
2472         CLEAR_PENDING_EXCEPTION;
2473         throwable = Handle();
2474       } else {
2475         throwable = Handle(THREAD, cause.get_oop());
2476         if (throwable.not_null()) {
2477           st->print("Caused by: ");
2478           print(throwable(), st);
2479           st->cr();
2480         }
2481       }
2482     } else {
2483       st->print_raw_cr("<<cannot call Java to get cause>>");
2484       return;
2485     }
2486   }
2487 }
2488 
2489 /**
2490  * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2491  */
2492 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2493   assert(throwable->is_a(vmClasses::Throwable_klass()), "Throwable instance expected");
2494   JavaValue result(T_VOID);
2495   JavaCalls::call_virtual(&result,
2496                           throwable,
2497                           vmClasses::Throwable_klass(),
2498                           vmSymbols::printStackTrace_name(),
2499                           vmSymbols::void_method_signature(),
2500                           THREAD);
2501 }
2502 
2503 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2504   if (!StackTraceInThrowable) return;
2505   ResourceMark rm(THREAD);
2506 
2507   // Start out by clearing the backtrace for this object, in case the VM
2508   // runs out of memory while allocating the stack trace
2509   set_backtrace(throwable(), nullptr);
2510   // Clear lazily constructed Java level stacktrace if refilling occurs
2511   // This is unnecessary in 1.7+ but harmless
2512   clear_stacktrace(throwable());
2513 
2514   int max_depth = MaxJavaStackTraceDepth;
2515   JavaThread* thread = THREAD;
2516 
2517   BacktraceBuilder bt(CHECK);
2518 
2519   // If there is no Java frame just return the method that was being called
2520   // with bci 0
2521   if (!thread->has_last_Java_frame()) {
2522     if (max_depth >= 1 && method() != nullptr) {
2523       bt.push(method(), 0, CHECK);
2524       log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2525       set_depth(throwable(), 1);
2526       set_backtrace(throwable(), bt.backtrace());
2527     }
2528     return;
2529   }
2530 
2531   // Instead of using vframe directly, this version of fill_in_stack_trace
2532   // basically handles everything by hand. This significantly improved the
2533   // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2534   // See bug 6333838 for  more details.
2535   // The "ASSERT" here is to verify this method generates the exactly same stack
2536   // trace as utilizing vframe.
2537 #ifdef ASSERT
2538   vframeStream st(thread, false /* stop_at_java_call_stub */, false /* process_frames */);
2539 #endif
2540   int total_count = 0;
2541   RegisterMap map(thread,
2542                   RegisterMap::UpdateMap::skip,
2543                   RegisterMap::ProcessFrames::skip,
2544                   RegisterMap::WalkContinuation::include);
2545   int decode_offset = 0;
2546   CompiledMethod* nm = nullptr;
2547   bool skip_fillInStackTrace_check = false;
2548   bool skip_throwableInit_check = false;
2549   bool skip_hidden = !ShowHiddenFrames;
2550   bool show_carrier = ShowCarrierFrames;
2551   ContinuationEntry* cont_entry = thread->last_continuation();
2552   for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2553     Method* method = nullptr;
2554     int bci = 0;
2555 
2556     // Compiled java method case.
2557     if (decode_offset != 0) {
2558       DebugInfoReadStream stream(nm, decode_offset);
2559       decode_offset = stream.read_int();
2560       method = (Method*)nm->metadata_at(stream.read_int());
2561       bci = stream.read_bci();
2562     } else {
2563       if (fr.is_first_frame()) break;
2564 
2565       if (Continuation::is_continuation_enterSpecial(fr)) {
2566         assert(cont_entry == Continuation::get_continuation_entry_for_entry_frame(thread, fr), "");
2567         if (!show_carrier && cont_entry->is_virtual_thread()) {
2568           break;
2569         }
2570         cont_entry = cont_entry->parent();
2571       }
2572 
2573       address pc = fr.pc();
2574       if (fr.is_interpreted_frame()) {
2575         address bcp;
2576         if (!map.in_cont()) {
2577           bcp = fr.interpreter_frame_bcp();
2578           method = fr.interpreter_frame_method();
2579         } else {
2580           bcp = map.stack_chunk()->interpreter_frame_bcp(fr);
2581           method = map.stack_chunk()->interpreter_frame_method(fr);
2582         }
2583         bci =  method->bci_from(bcp);
2584         fr = fr.sender(&map);
2585       } else {
2586         CodeBlob* cb = fr.cb();
2587         // HMMM QQQ might be nice to have frame return nm as null if cb is non-null
2588         // but non nmethod
2589         fr = fr.sender(&map);
2590         if (cb == nullptr || !cb->is_compiled()) {
2591           continue;
2592         }
2593         nm = cb->as_compiled_method();
2594         assert(nm->method() != nullptr, "must be");
2595         if (nm->method()->is_native()) {
2596           method = nm->method();
2597           bci = 0;
2598         } else {
2599           PcDesc* pd = nm->pc_desc_at(pc);
2600           decode_offset = pd->scope_decode_offset();
2601           // if decode_offset is not equal to 0, it will execute the
2602           // "compiled java method case" at the beginning of the loop.
2603           continue;
2604         }
2605       }
2606     }
2607 #ifdef ASSERT
2608     if (!st.at_end()) { // TODO LOOM remove once we show only vthread trace
2609       assert(st.method() == method && st.bci() == bci, "Wrong stack trace");
2610       st.next();
2611     }
2612 #endif
2613 
2614     // the format of the stacktrace will be:
2615     // - 1 or more fillInStackTrace frames for the exception class (skipped)
2616     // - 0 or more <init> methods for the exception class (skipped)
2617     // - rest of the stack
2618 
2619     if (!skip_fillInStackTrace_check) {
2620       if (method->name() == vmSymbols::fillInStackTrace_name() &&
2621           throwable->is_a(method->method_holder())) {
2622         continue;
2623       }
2624       else {
2625         skip_fillInStackTrace_check = true; // gone past them all
2626       }
2627     }
2628     if (!skip_throwableInit_check) {
2629       assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2630 
2631       // skip <init> methods of the exception class and superclasses
2632       // This is similar to classic VM.
2633       if (method->name() == vmSymbols::object_initializer_name() &&
2634           throwable->is_a(method->method_holder())) {
2635         continue;
2636       } else {
2637         // there are none or we've seen them all - either way stop checking
2638         skip_throwableInit_check = true;
2639       }
2640     }
2641     if (method->is_hidden() || method->is_continuation_enter_intrinsic()) {
2642       if (skip_hidden) {
2643         if (total_count == 0) {
2644           // The top frame will be hidden from the stack trace.
2645           bt.set_has_hidden_top_frame();
2646         }
2647         continue;
2648       }
2649     }
2650 
2651     bt.push(method, bci, CHECK);
2652     total_count++;
2653   }
2654 
2655   log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2656 
2657   // Put completed stack trace into throwable object
2658   set_backtrace(throwable(), bt.backtrace());
2659   set_depth(throwable(), total_count);
2660 }
2661 
2662 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2663   // No-op if stack trace is disabled
2664   if (!StackTraceInThrowable) {
2665     return;
2666   }
2667 
2668   // Disable stack traces for some preallocated out of memory errors
2669   if (!Universe::should_fill_in_stack_trace(throwable)) {
2670     return;
2671   }
2672 
2673   JavaThread* THREAD = JavaThread::current(); // For exception macros.
2674   PreserveExceptionMark pm(THREAD);
2675 
2676   fill_in_stack_trace(throwable, method, THREAD);
2677   // Ignore exceptions thrown during stack trace filling (OOM) and reinstall the
2678   // original exception via the PreserveExceptionMark destructor.
2679   CLEAR_PENDING_EXCEPTION;
2680 }
2681 
2682 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2683   // Allocate stack trace - backtrace is created but not filled in
2684 
2685   // No-op if stack trace is disabled
2686   if (!StackTraceInThrowable) return;
2687   BacktraceBuilder bt(CHECK);   // creates a backtrace
2688   set_backtrace(throwable(), bt.backtrace());
2689 }
2690 
2691 
2692 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2693   // Fill in stack trace into preallocated backtrace (no GC)
2694 
2695   // No-op if stack trace is disabled
2696   if (!StackTraceInThrowable) return;
2697 
2698   assert(throwable->is_a(vmClasses::Throwable_klass()), "sanity check");
2699 
2700   JavaThread* THREAD = JavaThread::current(); // For exception macros.
2701 
2702   objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2703   assert(backtrace.not_null(), "backtrace should have been preallocated");
2704 
2705   ResourceMark rm(THREAD);
2706   vframeStream st(THREAD, false /* stop_at_java_call_stub */, false /* process_frames */);
2707 
2708   BacktraceBuilder bt(THREAD, backtrace);
2709 
2710   // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2711   // methods as preallocated errors aren't created by "java" code.
2712 
2713   // fill in as much stack trace as possible
2714   int chunk_count = 0;
2715   for (;!st.at_end(); st.next()) {
2716     bt.push(st.method(), st.bci(), CHECK);
2717     chunk_count++;
2718 
2719     // Bail-out for deep stacks
2720     if (chunk_count >= trace_chunk_size) break;
2721   }
2722   set_depth(throwable(), chunk_count);
2723   log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2724 
2725   // We support the Throwable immutability protocol defined for Java 7.
2726   java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2727   assert(java_lang_Throwable::unassigned_stacktrace() != nullptr, "not initialized");
2728 }
2729 
2730 void java_lang_Throwable::get_stack_trace_elements(int depth, Handle backtrace,
2731                                                    objArrayHandle stack_trace_array_h, TRAPS) {
2732 
2733   if (backtrace.is_null() || stack_trace_array_h.is_null()) {
2734     THROW(vmSymbols::java_lang_NullPointerException());
2735   }
2736 
2737   assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2738 
2739   if (stack_trace_array_h->length() != depth) {
2740     THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2741   }
2742 
2743   objArrayHandle result(THREAD, objArrayOop(backtrace()));
2744   BacktraceIterator iter(result, THREAD);
2745 
2746   int index = 0;
2747   while (iter.repeat()) {
2748     BacktraceElement bte = iter.next(THREAD);
2749 
2750     Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2751 
2752     if (stack_trace_element.is_null()) {
2753       THROW(vmSymbols::java_lang_NullPointerException());
2754     }
2755 
2756     InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2757     methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2758 
2759     java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2760                                          method,
2761                                          bte._version,
2762                                          bte._bci,
2763                                          bte._name,
2764                                          CHECK);
2765   }
2766 }
2767 
2768 Handle java_lang_Throwable::create_initialization_error(JavaThread* current, Handle throwable) {
2769   // Creates an ExceptionInInitializerError to be recorded as the initialization error when class initialization
2770   // failed due to the passed in 'throwable'. We cannot save 'throwable' directly due to issues with keeping alive
2771   // all objects referenced via its stacktrace. So instead we save a new EIIE instance, with the same message and
2772   // symbolic stacktrace of 'throwable'.
2773   assert(throwable.not_null(), "shouldn't be");
2774 
2775   // Now create the message from the original exception and thread name.
2776   ResourceMark rm(current);
2777   const char *message = nullptr;
2778   oop detailed_message = java_lang_Throwable::message(throwable());
2779   if (detailed_message != nullptr) {
2780     message = java_lang_String::as_utf8_string(detailed_message);
2781   }
2782   stringStream st;
2783   st.print("Exception %s%s ", throwable()->klass()->name()->as_klass_external_name(),
2784              message == nullptr ? "" : ":");
2785   if (message == nullptr) {
2786     st.print("[in thread \"%s\"]", current->name());
2787   } else {
2788     st.print("%s [in thread \"%s\"]", message, current->name());
2789   }
2790 
2791   Symbol* exception_name = vmSymbols::java_lang_ExceptionInInitializerError();
2792   Handle init_error = Exceptions::new_exception(current, exception_name, st.as_string());
2793   // If new_exception returns a different exception while creating the exception,
2794   // abandon the attempt to save the initialization error and return null.
2795   if (init_error->klass()->name() != exception_name) {
2796     log_info(class, init)("Exception %s thrown while saving initialization exception",
2797                         init_error->klass()->external_name());
2798     return Handle();
2799   }
2800 
2801   // Call to java to fill in the stack trace and clear declaringClassObject to
2802   // not keep classes alive in the stack trace.
2803   // call this:  public StackTraceElement[] getStackTrace()
2804   JavaValue result(T_ARRAY);
2805   JavaCalls::call_virtual(&result, throwable,
2806                           vmClasses::Throwable_klass(),
2807                           vmSymbols::getStackTrace_name(),
2808                           vmSymbols::getStackTrace_signature(),
2809                           current);
2810   if (!current->has_pending_exception()){
2811     Handle stack_trace(current, result.get_oop());
2812     assert(stack_trace->is_objArray(), "Should be an array");
2813     java_lang_Throwable::set_stacktrace(init_error(), stack_trace());
2814     // Clear backtrace because the stacktrace should be used instead.
2815     set_backtrace(init_error(), nullptr);
2816   } else {
2817     log_info(class, init)("Exception thrown while getting stack trace for initialization exception %s",
2818                         init_error->klass()->external_name());
2819     current->clear_pending_exception();
2820   }
2821 
2822   return init_error;
2823 }
2824 
2825 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) {
2826   JavaThread* current = JavaThread::current();
2827   objArrayHandle result(current, objArrayOop(backtrace(throwable)));
2828   BacktraceIterator iter(result, current);
2829   // No backtrace available.
2830   if (!iter.repeat()) return false;
2831 
2832   // If the exception happened in a frame that has been hidden, i.e.,
2833   // omitted from the back trace, we can not compute the message.
2834   oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset);
2835   if (hidden != nullptr) {
2836     return false;
2837   }
2838 
2839   // Get first backtrace element.
2840   BacktraceElement bte = iter.next(current);
2841 
2842   InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2843   assert(holder != nullptr, "first element should be non-null");
2844   Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version);
2845 
2846   // Original version is no longer available.
2847   if (m == nullptr || !version_matches(m, bte._version)) {
2848     return false;
2849   }
2850 
2851   *method = m;
2852   *bci = bte._bci;
2853   return true;
2854 }
2855 
2856 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
2857   // Allocate java.lang.StackTraceElement instance
2858   InstanceKlass* k = vmClasses::StackTraceElement_klass();
2859   assert(k != nullptr, "must be loaded in 1.4+");
2860   if (k->should_be_initialized()) {
2861     k->initialize(CHECK_NULL);
2862   }
2863 
2864   Handle element = k->allocate_instance_handle(CHECK_NULL);
2865 
2866   int version = method->constants()->version();
2867   fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_NULL);
2868   return element();
2869 }
2870 
2871 void java_lang_StackTraceElement::fill_in(Handle element,
2872                                           InstanceKlass* holder, const methodHandle& method,
2873                                           int version, int bci, Symbol* name, TRAPS) {
2874   assert(element->is_a(vmClasses::StackTraceElement_klass()), "sanity check");
2875 
2876   ResourceMark rm(THREAD);
2877   HandleMark hm(THREAD);
2878 
2879   // Fill in class name
2880   Handle java_class(THREAD, holder->java_mirror());
2881   oop classname = java_lang_Class::name(java_class, CHECK);
2882   java_lang_StackTraceElement::set_declaringClass(element(), classname);
2883   java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
2884 
2885   oop loader = holder->class_loader();
2886   if (loader != nullptr) {
2887     oop loader_name = java_lang_ClassLoader::name(loader);
2888     if (loader_name != nullptr)
2889       java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
2890   }
2891 
2892   // Fill in method name
2893   oop methodname = StringTable::intern(name, CHECK);
2894   java_lang_StackTraceElement::set_methodName(element(), methodname);
2895 
2896   // Fill in module name and version
2897   ModuleEntry* module = holder->module();
2898   if (module->is_named()) {
2899     oop module_name = StringTable::intern(module->name(), CHECK);
2900     java_lang_StackTraceElement::set_moduleName(element(), module_name);
2901     oop module_version;
2902     if (module->version() != nullptr) {
2903       module_version = StringTable::intern(module->version(), CHECK);
2904     } else {
2905       module_version = nullptr;
2906     }
2907     java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
2908   }
2909 
2910   if (method() == nullptr || !version_matches(method(), version)) {
2911     // The method was redefined, accurate line number information isn't available
2912     java_lang_StackTraceElement::set_fileName(element(), nullptr);
2913     java_lang_StackTraceElement::set_lineNumber(element(), -1);
2914   } else {
2915     Symbol* source;
2916     oop source_file;
2917     int line_number;
2918     decode_file_and_line(java_class, holder, version, method, bci, source, source_file, line_number, CHECK);
2919 
2920     java_lang_StackTraceElement::set_fileName(element(), source_file);
2921     java_lang_StackTraceElement::set_lineNumber(element(), line_number);
2922   }
2923 }
2924 
2925 void java_lang_StackTraceElement::decode_file_and_line(Handle java_class,
2926                                                        InstanceKlass* holder,
2927                                                        int version,
2928                                                        const methodHandle& method,
2929                                                        int bci,
2930                                                        Symbol*& source,
2931                                                        oop& source_file,
2932                                                        int& line_number, TRAPS) {
2933   // Fill in source file name and line number.
2934   source = Backtrace::get_source_file_name(holder, version);
2935   source_file = java_lang_Class::source_file(java_class());
2936   if (source != nullptr) {
2937     // Class was not redefined. We can trust its cache if set,
2938     // else we have to initialize it.
2939     if (source_file == nullptr) {
2940       source_file = StringTable::intern(source, CHECK);
2941       java_lang_Class::set_source_file(java_class(), source_file);
2942     }
2943   } else {
2944     // Class was redefined. Dump the cache if it was set.
2945     if (source_file != nullptr) {
2946       source_file = nullptr;
2947       java_lang_Class::set_source_file(java_class(), source_file);
2948     }
2949   }
2950   line_number = Backtrace::get_line_number(method(), bci);
2951 }
2952 
2953 #if INCLUDE_JVMCI
2954 void java_lang_StackTraceElement::decode(const methodHandle& method, int bci,
2955                                          Symbol*& filename, int& line_number, TRAPS) {
2956   ResourceMark rm(THREAD);
2957   HandleMark hm(THREAD);
2958 
2959   filename = nullptr;
2960   line_number = -1;
2961 
2962   oop source_file;
2963   int version = method->constants()->version();
2964   InstanceKlass* holder = method->method_holder();
2965   Handle java_class(THREAD, holder->java_mirror());
2966   decode_file_and_line(java_class, holder, version, method, bci, filename, source_file, line_number, CHECK);
2967 }
2968 #endif // INCLUDE_JVMCI
2969 
2970 // java_lang_ClassFrameInfo
2971 
2972 int java_lang_ClassFrameInfo::_classOrMemberName_offset;
2973 int java_lang_ClassFrameInfo::_flags_offset;
2974 
2975 #define CLASSFRAMEINFO_FIELDS_DO(macro) \
2976   macro(_classOrMemberName_offset, k, "classOrMemberName", object_signature,  false); \
2977   macro(_flags_offset,             k, vmSymbols::flags_name(), int_signature, false)
2978 
2979 void java_lang_ClassFrameInfo::compute_offsets() {
2980   InstanceKlass* k = vmClasses::ClassFrameInfo_klass();
2981   CLASSFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2982 }
2983 
2984 #if INCLUDE_CDS
2985 void java_lang_ClassFrameInfo::serialize_offsets(SerializeClosure* f) {
2986   CLASSFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2987 }
2988 #endif
2989 
2990 static int get_flags(const methodHandle& m) {
2991   int flags = (jushort)( m->access_flags().as_short() & JVM_RECOGNIZED_METHOD_MODIFIERS );
2992   if (m->is_initializer()) {
2993     flags |= java_lang_invoke_MemberName::MN_IS_CONSTRUCTOR;
2994   } else {
2995     flags |= java_lang_invoke_MemberName::MN_IS_METHOD;
2996   }
2997   if (m->caller_sensitive()) {
2998     flags |= java_lang_invoke_MemberName::MN_CALLER_SENSITIVE;
2999   }
3000   if (m->is_hidden()) {
3001     flags |= java_lang_invoke_MemberName::MN_HIDDEN_MEMBER;
3002   }
3003   assert((flags & 0xFF000000) == 0, "unexpected flags");
3004   return flags;
3005 }
3006 
3007 oop java_lang_ClassFrameInfo::classOrMemberName(oop obj) {
3008   return obj->obj_field(_classOrMemberName_offset);
3009 }
3010 
3011 int java_lang_ClassFrameInfo::flags(oop obj) {
3012   return obj->int_field(_flags_offset);
3013 }
3014 
3015 void java_lang_ClassFrameInfo::init_class(Handle stackFrame, const methodHandle& m) {
3016   stackFrame->obj_field_put(_classOrMemberName_offset, m->method_holder()->java_mirror());
3017   // flags is initialized when ClassFrameInfo object is constructed and retain the value
3018   int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3019   stackFrame->int_field_put(_flags_offset, flags);
3020 }
3021 
3022 void java_lang_ClassFrameInfo::init_method(Handle stackFrame, const methodHandle& m, TRAPS) {
3023   oop rmethod_name = java_lang_invoke_ResolvedMethodName::find_resolved_method(m, CHECK);
3024   stackFrame->obj_field_put(_classOrMemberName_offset, rmethod_name);
3025   // flags is initialized when ClassFrameInfo object is constructed and retain the value
3026   int flags = java_lang_ClassFrameInfo::flags(stackFrame()) | get_flags(m);
3027   stackFrame->int_field_put(_flags_offset, flags);
3028 }
3029 
3030 
3031 // java_lang_StackFrameInfo
3032 
3033 int java_lang_StackFrameInfo::_type_offset;
3034 int java_lang_StackFrameInfo::_name_offset;
3035 int java_lang_StackFrameInfo::_bci_offset;
3036 int java_lang_StackFrameInfo::_version_offset;
3037 int java_lang_StackFrameInfo::_contScope_offset;
3038 
3039 #define STACKFRAMEINFO_FIELDS_DO(macro) \
3040   macro(_type_offset,       k, "type",       object_signature,            false); \
3041   macro(_name_offset,       k, "name",       string_signature,            false); \
3042   macro(_bci_offset,        k, "bci",        int_signature,               false); \
3043   macro(_contScope_offset,  k, "contScope",  continuationscope_signature, false)
3044 
3045 void java_lang_StackFrameInfo::compute_offsets() {
3046   InstanceKlass* k = vmClasses::StackFrameInfo_klass();
3047   STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3048   STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3049 }
3050 
3051 #if INCLUDE_CDS
3052 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
3053   STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3054   STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3055 }
3056 #endif
3057 
3058 Method* java_lang_StackFrameInfo::get_method(oop obj) {
3059   oop m = java_lang_ClassFrameInfo::classOrMemberName(obj);
3060   Method* method = java_lang_invoke_ResolvedMethodName::vmtarget(m);
3061   return method;
3062 }
3063 
3064 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS) {
3065   // set Method* or mid/cpref
3066   HandleMark hm(THREAD);
3067   Handle cont_h(THREAD, cont);
3068   java_lang_ClassFrameInfo::init_method(stackFrame, method, CHECK);
3069 
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 
3085   Method* method = java_lang_StackFrameInfo::get_method(stackFrame());
3086   InstanceKlass* holder = method->method_holder();
3087   short version = stackFrame->short_field(_version_offset);
3088   int bci = stackFrame->int_field(_bci_offset);
3089   Symbol* name = method->name();
3090   java_lang_StackTraceElement::fill_in(stack_trace_element, holder, methodHandle(THREAD, method), version, bci, name, CHECK);
3091 }
3092 
3093 oop java_lang_StackFrameInfo::type(oop obj) {
3094   return obj->obj_field(_type_offset);
3095 }
3096 
3097 void java_lang_StackFrameInfo::set_type(oop obj, oop value) {
3098   obj->obj_field_put(_type_offset, value);
3099 }
3100 
3101 oop java_lang_StackFrameInfo::name(oop obj) {
3102   return obj->obj_field(_name_offset);
3103 }
3104 
3105 void java_lang_StackFrameInfo::set_name(oop obj, oop value) {
3106   obj->obj_field_put(_name_offset, value);
3107 }
3108 
3109 void java_lang_StackFrameInfo::set_version(oop obj, short value) {
3110   obj->short_field_put(_version_offset, value);
3111 }
3112 
3113 void java_lang_StackFrameInfo::set_bci(oop obj, int value) {
3114   assert(value >= 0 && value < max_jushort, "must be a valid bci value");
3115   obj->int_field_put(_bci_offset, value);
3116 }
3117 
3118 void java_lang_StackFrameInfo::set_contScope(oop obj, oop value) {
3119   obj->obj_field_put(_contScope_offset, value);
3120 }
3121 
3122 int java_lang_LiveStackFrameInfo::_monitors_offset;
3123 int java_lang_LiveStackFrameInfo::_locals_offset;
3124 int java_lang_LiveStackFrameInfo::_operands_offset;
3125 int java_lang_LiveStackFrameInfo::_mode_offset;
3126 
3127 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
3128   macro(_monitors_offset,   k, "monitors",    object_array_signature, false); \
3129   macro(_locals_offset,     k, "locals",      object_array_signature, false); \
3130   macro(_operands_offset,   k, "operands",    object_array_signature, false); \
3131   macro(_mode_offset,       k, "mode",        int_signature,          false)
3132 
3133 void java_lang_LiveStackFrameInfo::compute_offsets() {
3134   InstanceKlass* k = vmClasses::LiveStackFrameInfo_klass();
3135   LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3136 }
3137 
3138 #if INCLUDE_CDS
3139 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
3140   LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3141 }
3142 #endif
3143 
3144 void java_lang_LiveStackFrameInfo::set_monitors(oop obj, oop value) {
3145   obj->obj_field_put(_monitors_offset, value);
3146 }
3147 
3148 void java_lang_LiveStackFrameInfo::set_locals(oop obj, oop value) {
3149   obj->obj_field_put(_locals_offset, value);
3150 }
3151 
3152 void java_lang_LiveStackFrameInfo::set_operands(oop obj, oop value) {
3153   obj->obj_field_put(_operands_offset, value);
3154 }
3155 
3156 void java_lang_LiveStackFrameInfo::set_mode(oop obj, int value) {
3157   obj->int_field_put(_mode_offset, value);
3158 }
3159 
3160 
3161 // java_lang_AccessibleObject
3162 
3163 int java_lang_reflect_AccessibleObject::_override_offset;
3164 
3165 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
3166   macro(_override_offset, k, "override", bool_signature, false)
3167 
3168 void java_lang_reflect_AccessibleObject::compute_offsets() {
3169   InstanceKlass* k = vmClasses::reflect_AccessibleObject_klass();
3170   ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3171 }
3172 
3173 #if INCLUDE_CDS
3174 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
3175   ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3176 }
3177 #endif
3178 
3179 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
3180   return (jboolean) reflect->bool_field(_override_offset);
3181 }
3182 
3183 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
3184   reflect->bool_field_put(_override_offset, (int) value);
3185 }
3186 
3187 // java_lang_reflect_Method
3188 
3189 int java_lang_reflect_Method::_clazz_offset;
3190 int java_lang_reflect_Method::_name_offset;
3191 int java_lang_reflect_Method::_returnType_offset;
3192 int java_lang_reflect_Method::_parameterTypes_offset;
3193 int java_lang_reflect_Method::_exceptionTypes_offset;
3194 int java_lang_reflect_Method::_slot_offset;
3195 int java_lang_reflect_Method::_modifiers_offset;
3196 int java_lang_reflect_Method::_signature_offset;
3197 int java_lang_reflect_Method::_annotations_offset;
3198 int java_lang_reflect_Method::_parameter_annotations_offset;
3199 int java_lang_reflect_Method::_annotation_default_offset;
3200 
3201 #define METHOD_FIELDS_DO(macro) \
3202   macro(_clazz_offset,          k, vmSymbols::clazz_name(),          class_signature,       false); \
3203   macro(_name_offset,           k, vmSymbols::name_name(),           string_signature,      false); \
3204   macro(_returnType_offset,     k, vmSymbols::returnType_name(),     class_signature,       false); \
3205   macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3206   macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3207   macro(_slot_offset,           k, vmSymbols::slot_name(),           int_signature,         false); \
3208   macro(_modifiers_offset,      k, vmSymbols::modifiers_name(),      int_signature,         false); \
3209   macro(_signature_offset,             k, vmSymbols::signature_name(),             string_signature,     false); \
3210   macro(_annotations_offset,           k, vmSymbols::annotations_name(),           byte_array_signature, false); \
3211   macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
3212   macro(_annotation_default_offset,    k, vmSymbols::annotation_default_name(),    byte_array_signature, false);
3213 
3214 void java_lang_reflect_Method::compute_offsets() {
3215   InstanceKlass* k = vmClasses::reflect_Method_klass();
3216   METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3217 }
3218 
3219 #if INCLUDE_CDS
3220 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
3221   METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3222 }
3223 #endif
3224 
3225 Handle java_lang_reflect_Method::create(TRAPS) {
3226   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3227   Klass* klass = vmClasses::reflect_Method_klass();
3228   // This class is eagerly initialized during VM initialization, since we keep a reference
3229   // to one of the methods
3230   assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
3231   return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
3232 }
3233 
3234 oop java_lang_reflect_Method::clazz(oop reflect) {
3235   return reflect->obj_field(_clazz_offset);
3236 }
3237 
3238 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
3239    reflect->obj_field_put(_clazz_offset, value);
3240 }
3241 
3242 int java_lang_reflect_Method::slot(oop reflect) {
3243   return reflect->int_field(_slot_offset);
3244 }
3245 
3246 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
3247   reflect->int_field_put(_slot_offset, value);
3248 }
3249 
3250 void java_lang_reflect_Method::set_name(oop method, oop value) {
3251   method->obj_field_put(_name_offset, value);
3252 }
3253 
3254 oop java_lang_reflect_Method::return_type(oop method) {
3255   return method->obj_field(_returnType_offset);
3256 }
3257 
3258 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
3259   method->obj_field_put(_returnType_offset, value);
3260 }
3261 
3262 oop java_lang_reflect_Method::parameter_types(oop method) {
3263   return method->obj_field(_parameterTypes_offset);
3264 }
3265 
3266 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
3267   method->obj_field_put(_parameterTypes_offset, value);
3268 }
3269 
3270 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
3271   method->obj_field_put(_exceptionTypes_offset, value);
3272 }
3273 
3274 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
3275   method->int_field_put(_modifiers_offset, value);
3276 }
3277 
3278 void java_lang_reflect_Method::set_signature(oop method, oop value) {
3279   method->obj_field_put(_signature_offset, value);
3280 }
3281 
3282 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
3283   method->obj_field_put(_annotations_offset, value);
3284 }
3285 
3286 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
3287   method->obj_field_put(_parameter_annotations_offset, value);
3288 }
3289 
3290 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
3291   method->obj_field_put(_annotation_default_offset, value);
3292 }
3293 
3294 int java_lang_reflect_Constructor::_clazz_offset;
3295 int java_lang_reflect_Constructor::_parameterTypes_offset;
3296 int java_lang_reflect_Constructor::_exceptionTypes_offset;
3297 int java_lang_reflect_Constructor::_slot_offset;
3298 int java_lang_reflect_Constructor::_modifiers_offset;
3299 int java_lang_reflect_Constructor::_signature_offset;
3300 int java_lang_reflect_Constructor::_annotations_offset;
3301 int java_lang_reflect_Constructor::_parameter_annotations_offset;
3302 
3303 #define CONSTRUCTOR_FIELDS_DO(macro) \
3304   macro(_clazz_offset,          k, vmSymbols::clazz_name(),          class_signature,       false); \
3305   macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3306   macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3307   macro(_slot_offset,           k, vmSymbols::slot_name(),           int_signature,         false); \
3308   macro(_modifiers_offset,      k, vmSymbols::modifiers_name(),      int_signature,         false); \
3309   macro(_signature_offset,             k, vmSymbols::signature_name(),             string_signature,     false); \
3310   macro(_annotations_offset,           k, vmSymbols::annotations_name(),           byte_array_signature, false); \
3311   macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
3312 
3313 void java_lang_reflect_Constructor::compute_offsets() {
3314   InstanceKlass* k = vmClasses::reflect_Constructor_klass();
3315   CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3316 }
3317 
3318 #if INCLUDE_CDS
3319 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
3320   CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3321 }
3322 #endif
3323 
3324 Handle java_lang_reflect_Constructor::create(TRAPS) {
3325   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3326   Symbol* name = vmSymbols::java_lang_reflect_Constructor();
3327   Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3328   InstanceKlass* ik = InstanceKlass::cast(k);
3329   // Ensure it is initialized
3330   ik->initialize(CHECK_NH);
3331   return ik->allocate_instance_handle(THREAD);
3332 }
3333 
3334 oop java_lang_reflect_Constructor::clazz(oop reflect) {
3335   return reflect->obj_field(_clazz_offset);
3336 }
3337 
3338 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
3339    reflect->obj_field_put(_clazz_offset, value);
3340 }
3341 
3342 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
3343   return constructor->obj_field(_parameterTypes_offset);
3344 }
3345 
3346 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
3347   constructor->obj_field_put(_parameterTypes_offset, value);
3348 }
3349 
3350 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
3351   constructor->obj_field_put(_exceptionTypes_offset, value);
3352 }
3353 
3354 int java_lang_reflect_Constructor::slot(oop reflect) {
3355   return reflect->int_field(_slot_offset);
3356 }
3357 
3358 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
3359   reflect->int_field_put(_slot_offset, value);
3360 }
3361 
3362 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
3363   constructor->int_field_put(_modifiers_offset, value);
3364 }
3365 
3366 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
3367   constructor->obj_field_put(_signature_offset, value);
3368 }
3369 
3370 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
3371   constructor->obj_field_put(_annotations_offset, value);
3372 }
3373 
3374 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
3375   method->obj_field_put(_parameter_annotations_offset, value);
3376 }
3377 
3378 int java_lang_reflect_Field::_clazz_offset;
3379 int java_lang_reflect_Field::_name_offset;
3380 int java_lang_reflect_Field::_type_offset;
3381 int java_lang_reflect_Field::_slot_offset;
3382 int java_lang_reflect_Field::_modifiers_offset;
3383 int java_lang_reflect_Field::_trusted_final_offset;
3384 int java_lang_reflect_Field::_signature_offset;
3385 int java_lang_reflect_Field::_annotations_offset;
3386 
3387 #define FIELD_FIELDS_DO(macro) \
3388   macro(_clazz_offset,     k, vmSymbols::clazz_name(),     class_signature,  false); \
3389   macro(_name_offset,      k, vmSymbols::name_name(),      string_signature, false); \
3390   macro(_type_offset,      k, vmSymbols::type_name(),      class_signature,  false); \
3391   macro(_slot_offset,      k, vmSymbols::slot_name(),      int_signature,    false); \
3392   macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature,    false); \
3393   macro(_trusted_final_offset,    k, vmSymbols::trusted_final_name(),    bool_signature,       false); \
3394   macro(_signature_offset,        k, vmSymbols::signature_name(),        string_signature,     false); \
3395   macro(_annotations_offset,      k, vmSymbols::annotations_name(),      byte_array_signature, false);
3396 
3397 void java_lang_reflect_Field::compute_offsets() {
3398   InstanceKlass* k = vmClasses::reflect_Field_klass();
3399   FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3400 }
3401 
3402 #if INCLUDE_CDS
3403 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
3404   FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3405 }
3406 #endif
3407 
3408 Handle java_lang_reflect_Field::create(TRAPS) {
3409   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3410   Symbol* name = vmSymbols::java_lang_reflect_Field();
3411   Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3412   InstanceKlass* ik = InstanceKlass::cast(k);
3413   // Ensure it is initialized
3414   ik->initialize(CHECK_NH);
3415   return ik->allocate_instance_handle(THREAD);
3416 }
3417 
3418 oop java_lang_reflect_Field::clazz(oop reflect) {
3419   return reflect->obj_field(_clazz_offset);
3420 }
3421 
3422 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
3423   reflect->obj_field_put(_clazz_offset, value);
3424 }
3425 
3426 oop java_lang_reflect_Field::name(oop field) {
3427   return field->obj_field(_name_offset);
3428 }
3429 
3430 void java_lang_reflect_Field::set_name(oop field, oop value) {
3431   field->obj_field_put(_name_offset, value);
3432 }
3433 
3434 oop java_lang_reflect_Field::type(oop field) {
3435   return field->obj_field(_type_offset);
3436 }
3437 
3438 void java_lang_reflect_Field::set_type(oop field, oop value) {
3439   field->obj_field_put(_type_offset, value);
3440 }
3441 
3442 int java_lang_reflect_Field::slot(oop reflect) {
3443   return reflect->int_field(_slot_offset);
3444 }
3445 
3446 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
3447   reflect->int_field_put(_slot_offset, value);
3448 }
3449 
3450 int java_lang_reflect_Field::modifiers(oop field) {
3451   return field->int_field(_modifiers_offset);
3452 }
3453 
3454 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
3455   field->int_field_put(_modifiers_offset, value);
3456 }
3457 
3458 void java_lang_reflect_Field::set_trusted_final(oop field) {
3459   field->bool_field_put(_trusted_final_offset, true);
3460 }
3461 
3462 void java_lang_reflect_Field::set_signature(oop field, oop value) {
3463   field->obj_field_put(_signature_offset, value);
3464 }
3465 
3466 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
3467   field->obj_field_put(_annotations_offset, value);
3468 }
3469 
3470 oop java_lang_reflect_RecordComponent::create(InstanceKlass* holder, RecordComponent* component, TRAPS) {
3471   // Allocate java.lang.reflect.RecordComponent instance
3472   HandleMark hm(THREAD);
3473   InstanceKlass* ik = vmClasses::RecordComponent_klass();
3474   assert(ik != nullptr, "must be loaded");
3475   ik->initialize(CHECK_NULL);
3476 
3477   Handle element = ik->allocate_instance_handle(CHECK_NULL);
3478 
3479   Handle decl_class(THREAD, holder->java_mirror());
3480   java_lang_reflect_RecordComponent::set_clazz(element(), decl_class());
3481 
3482   Symbol* name = holder->constants()->symbol_at(component->name_index()); // name_index is a utf8
3483   oop component_name = StringTable::intern(name, CHECK_NULL);
3484   java_lang_reflect_RecordComponent::set_name(element(), component_name);
3485 
3486   Symbol* type = holder->constants()->symbol_at(component->descriptor_index());
3487   Handle component_type_h =
3488     SystemDictionary::find_java_mirror_for_type(type, holder, SignatureStream::NCDFError, CHECK_NULL);
3489   java_lang_reflect_RecordComponent::set_type(element(), component_type_h());
3490 
3491   Method* accessor_method = nullptr;
3492   {
3493     // Prepend "()" to type to create the full method signature.
3494     ResourceMark rm(THREAD);
3495     int sig_len = type->utf8_length() + 3; // "()" and null char
3496     char* sig = NEW_RESOURCE_ARRAY(char, sig_len);
3497     jio_snprintf(sig, sig_len, "%c%c%s", JVM_SIGNATURE_FUNC, JVM_SIGNATURE_ENDFUNC, type->as_C_string());
3498     TempNewSymbol full_sig = SymbolTable::new_symbol(sig);
3499     accessor_method = holder->find_instance_method(name, full_sig, Klass::PrivateLookupMode::find);
3500   }
3501 
3502   if (accessor_method != nullptr) {
3503     methodHandle method(THREAD, accessor_method);
3504     oop m = Reflection::new_method(method, false, CHECK_NULL);
3505     java_lang_reflect_RecordComponent::set_accessor(element(), m);
3506   } else {
3507     java_lang_reflect_RecordComponent::set_accessor(element(), nullptr);
3508   }
3509 
3510   int sig_index = component->generic_signature_index();
3511   if (sig_index > 0) {
3512     Symbol* sig = holder->constants()->symbol_at(sig_index); // sig_index is a utf8
3513     oop component_sig = StringTable::intern(sig, CHECK_NULL);
3514     java_lang_reflect_RecordComponent::set_signature(element(), component_sig);
3515   } else {
3516     java_lang_reflect_RecordComponent::set_signature(element(), nullptr);
3517   }
3518 
3519   typeArrayOop annotation_oop = Annotations::make_java_array(component->annotations(), CHECK_NULL);
3520   java_lang_reflect_RecordComponent::set_annotations(element(), annotation_oop);
3521 
3522   typeArrayOop type_annotation_oop = Annotations::make_java_array(component->type_annotations(), CHECK_NULL);
3523   java_lang_reflect_RecordComponent::set_typeAnnotations(element(), type_annotation_oop);
3524 
3525   return element();
3526 }
3527 
3528 int reflect_ConstantPool::_oop_offset;
3529 
3530 #define CONSTANTPOOL_FIELDS_DO(macro) \
3531   macro(_oop_offset, k, "constantPoolOop", object_signature, false)
3532 
3533 void reflect_ConstantPool::compute_offsets() {
3534   InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3535   // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
3536   CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3537 }
3538 
3539 #if INCLUDE_CDS
3540 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3541   CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3542 }
3543 #endif
3544 
3545 int java_lang_reflect_Parameter::_name_offset;
3546 int java_lang_reflect_Parameter::_modifiers_offset;
3547 int java_lang_reflect_Parameter::_index_offset;
3548 int java_lang_reflect_Parameter::_executable_offset;
3549 
3550 #define PARAMETER_FIELDS_DO(macro) \
3551   macro(_name_offset,        k, vmSymbols::name_name(),        string_signature, false); \
3552   macro(_modifiers_offset,   k, vmSymbols::modifiers_name(),   int_signature,    false); \
3553   macro(_index_offset,       k, vmSymbols::index_name(),       int_signature,    false); \
3554   macro(_executable_offset,  k, vmSymbols::executable_name(),  executable_signature, false)
3555 
3556 void java_lang_reflect_Parameter::compute_offsets() {
3557   InstanceKlass* k = vmClasses::reflect_Parameter_klass();
3558   PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3559 }
3560 
3561 #if INCLUDE_CDS
3562 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3563   PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3564 }
3565 #endif
3566 
3567 Handle java_lang_reflect_Parameter::create(TRAPS) {
3568   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3569   Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3570   Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3571   InstanceKlass* ik = InstanceKlass::cast(k);
3572   // Ensure it is initialized
3573   ik->initialize(CHECK_NH);
3574   return ik->allocate_instance_handle(THREAD);
3575 }
3576 
3577 oop java_lang_reflect_Parameter::name(oop param) {
3578   return param->obj_field(_name_offset);
3579 }
3580 
3581 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3582   param->obj_field_put(_name_offset, value);
3583 }
3584 
3585 int java_lang_reflect_Parameter::modifiers(oop param) {
3586   return param->int_field(_modifiers_offset);
3587 }
3588 
3589 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3590   param->int_field_put(_modifiers_offset, value);
3591 }
3592 
3593 int java_lang_reflect_Parameter::index(oop param) {
3594   return param->int_field(_index_offset);
3595 }
3596 
3597 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3598   param->int_field_put(_index_offset, value);
3599 }
3600 
3601 oop java_lang_reflect_Parameter::executable(oop param) {
3602   return param->obj_field(_executable_offset);
3603 }
3604 
3605 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3606   param->obj_field_put(_executable_offset, value);
3607 }
3608 
3609 // java_lang_Module
3610 
3611 int java_lang_Module::_loader_offset;
3612 int java_lang_Module::_name_offset;
3613 int java_lang_Module::_module_entry_offset;
3614 
3615 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3616   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3617   return JavaCalls::construct_new_instance(vmClasses::Module_klass(),
3618                           vmSymbols::java_lang_module_init_signature(),
3619                           loader, module_name, CHECK_NH);
3620 }
3621 
3622 #define MODULE_FIELDS_DO(macro) \
3623   macro(_loader_offset,  k, vmSymbols::loader_name(),  classloader_signature, false); \
3624   macro(_name_offset,    k, vmSymbols::name_name(),    string_signature,      false)
3625 
3626 void java_lang_Module::compute_offsets() {
3627   InstanceKlass* k = vmClasses::Module_klass();
3628   MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3629   MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3630 }
3631 
3632 #if INCLUDE_CDS
3633 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3634   MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3635   MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3636 }
3637 #endif
3638 
3639 oop java_lang_Module::loader(oop module) {
3640   return module->obj_field(_loader_offset);
3641 }
3642 
3643 void java_lang_Module::set_loader(oop module, oop value) {
3644   module->obj_field_put(_loader_offset, value);
3645 }
3646 
3647 oop java_lang_Module::name(oop module) {
3648   return module->obj_field(_name_offset);
3649 }
3650 
3651 void java_lang_Module::set_name(oop module, oop value) {
3652   module->obj_field_put(_name_offset, value);
3653 }
3654 
3655 ModuleEntry* java_lang_Module::module_entry_raw(oop module) {
3656   assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3657   assert(module != nullptr, "module can't be null");
3658   assert(oopDesc::is_oop(module), "module must be oop");
3659 
3660   ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3661   return module_entry;
3662 }
3663 
3664 ModuleEntry* java_lang_Module::module_entry(oop module) {
3665   ModuleEntry* module_entry = module_entry_raw(module);
3666   if (module_entry == nullptr) {
3667     // If the inject field containing the ModuleEntry* is null then return the
3668     // class loader's unnamed module.
3669     oop loader = java_lang_Module::loader(module);
3670     Handle h_loader = Handle(Thread::current(), loader);
3671     ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3672     return loader_cld->unnamed_module();
3673   }
3674   return module_entry;
3675 }
3676 
3677 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3678   assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3679   assert(module != nullptr, "module can't be null");
3680   assert(oopDesc::is_oop(module), "module must be oop");
3681   module->address_field_put(_module_entry_offset, (address)module_entry);
3682 }
3683 
3684 Handle reflect_ConstantPool::create(TRAPS) {
3685   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3686   InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3687   // Ensure it is initialized
3688   k->initialize(CHECK_NH);
3689   return k->allocate_instance_handle(THREAD);
3690 }
3691 
3692 
3693 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3694   oop mirror = value->pool_holder()->java_mirror();
3695   // Save the mirror to get back the constant pool.
3696   reflect->obj_field_put(_oop_offset, mirror);
3697 }
3698 
3699 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3700 
3701   oop mirror = reflect->obj_field(_oop_offset);
3702   Klass* k = java_lang_Class::as_Klass(mirror);
3703   assert(k->is_instance_klass(), "Must be");
3704 
3705   // Get the constant pool back from the klass.  Since class redefinition
3706   // merges the new constant pool into the old, this is essentially the
3707   // same constant pool as the original.  If constant pool merging is
3708   // no longer done in the future, this will have to change to save
3709   // the original.
3710   return InstanceKlass::cast(k)->constants();
3711 }
3712 
3713 
3714 // Support for java_lang_ref_Reference
3715 
3716 bool java_lang_ref_Reference::_offsets_initialized;
3717 
3718 int java_lang_ref_Reference::_referent_offset;
3719 int java_lang_ref_Reference::_queue_offset;
3720 int java_lang_ref_Reference::_next_offset;
3721 int java_lang_ref_Reference::_discovered_offset;
3722 
3723 #define REFERENCE_FIELDS_DO(macro) \
3724   macro(_referent_offset,   k, "referent", object_signature, false); \
3725   macro(_queue_offset,      k, "queue", referencequeue_signature, false); \
3726   macro(_next_offset,       k, "next", reference_signature, false); \
3727   macro(_discovered_offset, k, "discovered", reference_signature, false);
3728 
3729 void java_lang_ref_Reference::compute_offsets() {
3730   if (_offsets_initialized) {
3731     return;
3732   }
3733   _offsets_initialized = true;
3734   InstanceKlass* k = vmClasses::Reference_klass();
3735   REFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3736 }
3737 
3738 #if INCLUDE_CDS
3739 void java_lang_ref_Reference::serialize_offsets(SerializeClosure* f) {
3740   f->do_bool(&_offsets_initialized);
3741   REFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3742 }
3743 #endif
3744 
3745 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
3746   assert(obj != nullptr, "sanity");
3747   if (offset != _referent_offset) {
3748     return false;
3749   }
3750 
3751   Klass* k = obj->klass();
3752   if (!k->is_instance_klass()) {
3753     return false;
3754   }
3755 
3756   InstanceKlass* ik = InstanceKlass::cast(obj->klass());
3757   bool is_reference = ik->reference_type() != REF_NONE;
3758   assert(!is_reference || ik->is_subclass_of(vmClasses::Reference_klass()), "sanity");
3759   return is_reference;
3760 }
3761 
3762 int java_lang_boxing_object::_value_offset;
3763 int java_lang_boxing_object::_long_value_offset;
3764 
3765 #define BOXING_FIELDS_DO(macro) \
3766   macro(_value_offset,      integerKlass, "value", int_signature, false); \
3767   macro(_long_value_offset, longKlass, "value", long_signature, false);
3768 
3769 void java_lang_boxing_object::compute_offsets() {
3770   InstanceKlass* integerKlass = vmClasses::Integer_klass();
3771   InstanceKlass* longKlass = vmClasses::Long_klass();
3772   BOXING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3773 }
3774 
3775 #if INCLUDE_CDS
3776 void java_lang_boxing_object::serialize_offsets(SerializeClosure* f) {
3777   BOXING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3778 }
3779 #endif
3780 
3781 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
3782   Klass* k = vmClasses::box_klass(type);
3783   if (k == nullptr)  return nullptr;
3784   InstanceKlass* ik = InstanceKlass::cast(k);
3785   if (!ik->is_initialized()) {
3786     ik->initialize(CHECK_NULL);
3787   }
3788   return ik->allocate_instance(THREAD);
3789 }
3790 
3791 
3792 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
3793   oop box = initialize_and_allocate(type, CHECK_NULL);
3794   if (box == nullptr)  return nullptr;
3795   switch (type) {
3796     case T_BOOLEAN:
3797       box->bool_field_put(_value_offset, value->z);
3798       break;
3799     case T_CHAR:
3800       box->char_field_put(_value_offset, value->c);
3801       break;
3802     case T_FLOAT:
3803       box->float_field_put(_value_offset, value->f);
3804       break;
3805     case T_DOUBLE:
3806       box->double_field_put(_long_value_offset, value->d);
3807       break;
3808     case T_BYTE:
3809       box->byte_field_put(_value_offset, value->b);
3810       break;
3811     case T_SHORT:
3812       box->short_field_put(_value_offset, value->s);
3813       break;
3814     case T_INT:
3815       box->int_field_put(_value_offset, value->i);
3816       break;
3817     case T_LONG:
3818       box->long_field_put(_long_value_offset, value->j);
3819       break;
3820     default:
3821       return nullptr;
3822   }
3823   return box;
3824 }
3825 
3826 
3827 BasicType java_lang_boxing_object::basic_type(oop box) {
3828   if (box == nullptr)  return T_ILLEGAL;
3829   BasicType type = vmClasses::box_klass_type(box->klass());
3830   if (type == T_OBJECT)         // 'unknown' value returned by SD::bkt
3831     return T_ILLEGAL;
3832   return type;
3833 }
3834 
3835 
3836 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
3837   BasicType type = vmClasses::box_klass_type(box->klass());
3838   switch (type) {
3839   case T_BOOLEAN:
3840     value->z = box->bool_field(_value_offset);
3841     break;
3842   case T_CHAR:
3843     value->c = box->char_field(_value_offset);
3844     break;
3845   case T_FLOAT:
3846     value->f = box->float_field(_value_offset);
3847     break;
3848   case T_DOUBLE:
3849     value->d = box->double_field(_long_value_offset);
3850     break;
3851   case T_BYTE:
3852     value->b = box->byte_field(_value_offset);
3853     break;
3854   case T_SHORT:
3855     value->s = box->short_field(_value_offset);
3856     break;
3857   case T_INT:
3858     value->i = box->int_field(_value_offset);
3859     break;
3860   case T_LONG:
3861     value->j = box->long_field(_long_value_offset);
3862     break;
3863   default:
3864     return T_ILLEGAL;
3865   } // end switch
3866   return type;
3867 }
3868 
3869 
3870 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
3871   BasicType type = vmClasses::box_klass_type(box->klass());
3872   switch (type) {
3873   case T_BOOLEAN:
3874     box->bool_field_put(_value_offset, value->z);
3875     break;
3876   case T_CHAR:
3877     box->char_field_put(_value_offset, value->c);
3878     break;
3879   case T_FLOAT:
3880     box->float_field_put(_value_offset, value->f);
3881     break;
3882   case T_DOUBLE:
3883     box->double_field_put(_long_value_offset, value->d);
3884     break;
3885   case T_BYTE:
3886     box->byte_field_put(_value_offset, value->b);
3887     break;
3888   case T_SHORT:
3889     box->short_field_put(_value_offset, value->s);
3890     break;
3891   case T_INT:
3892     box->int_field_put(_value_offset, value->i);
3893     break;
3894   case T_LONG:
3895     box->long_field_put(_long_value_offset, value->j);
3896     break;
3897   default:
3898     return T_ILLEGAL;
3899   } // end switch
3900   return type;
3901 }
3902 
3903 
3904 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
3905   switch (type) {
3906   case T_BOOLEAN:   st->print("%s", value->z ? "true" : "false");   break;
3907   case T_CHAR:      st->print("%d", value->c);                      break;
3908   case T_BYTE:      st->print("%d", value->b);                      break;
3909   case T_SHORT:     st->print("%d", value->s);                      break;
3910   case T_INT:       st->print("%d", value->i);                      break;
3911   case T_LONG:      st->print(JLONG_FORMAT, value->j);              break;
3912   case T_FLOAT:     st->print("%f", value->f);                      break;
3913   case T_DOUBLE:    st->print("%lf", value->d);                     break;
3914   default:          st->print("type %d?", type);                    break;
3915   }
3916 }
3917 
3918 
3919 // Support for java_lang_ref_SoftReference
3920 //
3921 
3922 int java_lang_ref_SoftReference::_timestamp_offset;
3923 int java_lang_ref_SoftReference::_static_clock_offset;
3924 
3925 #define SOFTREFERENCE_FIELDS_DO(macro) \
3926   macro(_timestamp_offset,    k, "timestamp", long_signature, false); \
3927   macro(_static_clock_offset, k, "clock",     long_signature, true)
3928 
3929 void java_lang_ref_SoftReference::compute_offsets() {
3930   InstanceKlass* k = vmClasses::SoftReference_klass();
3931   SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3932 }
3933 
3934 #if INCLUDE_CDS
3935 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
3936   SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3937 }
3938 #endif
3939 
3940 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
3941   return ref->long_field(_timestamp_offset);
3942 }
3943 
3944 jlong java_lang_ref_SoftReference::clock() {
3945   InstanceKlass* ik = vmClasses::SoftReference_klass();
3946   oop base = ik->static_field_base_raw();
3947   return base->long_field(_static_clock_offset);
3948 }
3949 
3950 void java_lang_ref_SoftReference::set_clock(jlong value) {
3951   InstanceKlass* ik = vmClasses::SoftReference_klass();
3952   oop base = ik->static_field_base_raw();
3953   base->long_field_put(_static_clock_offset, value);
3954 }
3955 
3956 // Support for java_lang_invoke_DirectMethodHandle
3957 
3958 int java_lang_invoke_DirectMethodHandle::_member_offset;
3959 
3960 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
3961   oop member_name = nullptr;
3962   assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
3963          "a DirectMethodHandle oop is expected");
3964   return dmh->obj_field(_member_offset);
3965 }
3966 
3967 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
3968   macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
3969 
3970 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
3971   InstanceKlass* k = vmClasses::DirectMethodHandle_klass();
3972   DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3973 }
3974 
3975 #if INCLUDE_CDS
3976 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
3977   DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3978 }
3979 #endif
3980 
3981 // Support for java_lang_invoke_MethodHandle
3982 
3983 int java_lang_invoke_MethodHandle::_type_offset;
3984 int java_lang_invoke_MethodHandle::_form_offset;
3985 
3986 int java_lang_invoke_MemberName::_clazz_offset;
3987 int java_lang_invoke_MemberName::_name_offset;
3988 int java_lang_invoke_MemberName::_type_offset;
3989 int java_lang_invoke_MemberName::_flags_offset;
3990 int java_lang_invoke_MemberName::_method_offset;
3991 int java_lang_invoke_MemberName::_vmindex_offset;
3992 
3993 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
3994 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
3995 
3996 int java_lang_invoke_LambdaForm::_vmentry_offset;
3997 
3998 #define METHODHANDLE_FIELDS_DO(macro) \
3999   macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
4000   macro(_form_offset, k, "form",                 java_lang_invoke_LambdaForm_signature, false)
4001 
4002 void java_lang_invoke_MethodHandle::compute_offsets() {
4003   InstanceKlass* k = vmClasses::MethodHandle_klass();
4004   METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4005 }
4006 
4007 #if INCLUDE_CDS
4008 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
4009   METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4010 }
4011 #endif
4012 
4013 #define MEMBERNAME_FIELDS_DO(macro) \
4014   macro(_clazz_offset,   k, vmSymbols::clazz_name(),   class_signature,  false); \
4015   macro(_name_offset,    k, vmSymbols::name_name(),    string_signature, false); \
4016   macro(_type_offset,    k, vmSymbols::type_name(),    object_signature, false); \
4017   macro(_flags_offset,   k, vmSymbols::flags_name(),   int_signature,    false); \
4018   macro(_method_offset,  k, vmSymbols::method_name(),  java_lang_invoke_ResolvedMethodName_signature, false)
4019 
4020 void java_lang_invoke_MemberName::compute_offsets() {
4021   InstanceKlass* k = vmClasses::MemberName_klass();
4022   MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4023   MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4024 }
4025 
4026 #if INCLUDE_CDS
4027 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
4028   MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4029   MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4030 }
4031 #endif
4032 
4033 #define RESOLVEDMETHOD_FIELDS_DO(macro) \
4034   macro(_vmholder_offset, k, "vmholder", class_signature, false)
4035 
4036 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
4037   InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4038   assert(k != nullptr, "jdk mismatch");
4039   RESOLVEDMETHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4040   RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4041 }
4042 
4043 #if INCLUDE_CDS
4044 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
4045   RESOLVEDMETHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4046   RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4047 }
4048 #endif
4049 
4050 #define LAMBDAFORM_FIELDS_DO(macro) \
4051   macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
4052 
4053 void java_lang_invoke_LambdaForm::compute_offsets() {
4054   InstanceKlass* k = vmClasses::LambdaForm_klass();
4055   assert (k != nullptr, "jdk mismatch");
4056   LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4057 }
4058 
4059 #if INCLUDE_CDS
4060 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
4061   LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4062 }
4063 #endif
4064 
4065 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
4066   return obj != nullptr && is_subclass(obj->klass());
4067 }
4068 
4069 int jdk_internal_foreign_abi_NativeEntryPoint::_method_type_offset;
4070 int jdk_internal_foreign_abi_NativeEntryPoint::_downcall_stub_address_offset;
4071 
4072 #define NEP_FIELDS_DO(macro) \
4073   macro(_method_type_offset,           k, "methodType",          java_lang_invoke_MethodType_signature, false); \
4074   macro(_downcall_stub_address_offset, k, "downcallStubAddress", long_signature, false);
4075 
4076 bool jdk_internal_foreign_abi_NativeEntryPoint::is_instance(oop obj) {
4077   return obj != nullptr && is_subclass(obj->klass());
4078 }
4079 
4080 void jdk_internal_foreign_abi_NativeEntryPoint::compute_offsets() {
4081   InstanceKlass* k = vmClasses::NativeEntryPoint_klass();
4082   NEP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4083 }
4084 
4085 #if INCLUDE_CDS
4086 void jdk_internal_foreign_abi_NativeEntryPoint::serialize_offsets(SerializeClosure* f) {
4087   NEP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4088 }
4089 #endif
4090 
4091 oop jdk_internal_foreign_abi_NativeEntryPoint::method_type(oop entry) {
4092   return entry->obj_field(_method_type_offset);
4093 }
4094 
4095 jlong jdk_internal_foreign_abi_NativeEntryPoint::downcall_stub_address(oop entry) {
4096   return entry->long_field(_downcall_stub_address_offset);
4097 }
4098 
4099 int jdk_internal_foreign_abi_ABIDescriptor::_inputStorage_offset;
4100 int jdk_internal_foreign_abi_ABIDescriptor::_outputStorage_offset;
4101 int jdk_internal_foreign_abi_ABIDescriptor::_volatileStorage_offset;
4102 int jdk_internal_foreign_abi_ABIDescriptor::_stackAlignment_offset;
4103 int jdk_internal_foreign_abi_ABIDescriptor::_shadowSpace_offset;
4104 int jdk_internal_foreign_abi_ABIDescriptor::_scratch1_offset;
4105 int jdk_internal_foreign_abi_ABIDescriptor::_scratch2_offset;
4106 
4107 #define ABIDescriptor_FIELDS_DO(macro) \
4108   macro(_inputStorage_offset,    k, "inputStorage",    jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4109   macro(_outputStorage_offset,   k, "outputStorage",   jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4110   macro(_volatileStorage_offset, k, "volatileStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4111   macro(_stackAlignment_offset,  k, "stackAlignment",  int_signature, false); \
4112   macro(_shadowSpace_offset,     k, "shadowSpace",     int_signature, false); \
4113   macro(_scratch1_offset,        k, "scratch1",        jdk_internal_foreign_abi_VMStorage_signature, false); \
4114   macro(_scratch2_offset,        k, "scratch2",        jdk_internal_foreign_abi_VMStorage_signature, false);
4115 
4116 bool jdk_internal_foreign_abi_ABIDescriptor::is_instance(oop obj) {
4117   return obj != nullptr && is_subclass(obj->klass());
4118 }
4119 
4120 void jdk_internal_foreign_abi_ABIDescriptor::compute_offsets() {
4121   InstanceKlass* k = vmClasses::ABIDescriptor_klass();
4122   ABIDescriptor_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4123 }
4124 
4125 #if INCLUDE_CDS
4126 void jdk_internal_foreign_abi_ABIDescriptor::serialize_offsets(SerializeClosure* f) {
4127   ABIDescriptor_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4128 }
4129 #endif
4130 
4131 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::inputStorage(oop entry) {
4132   return oop_cast<objArrayOop>(entry->obj_field(_inputStorage_offset));
4133 }
4134 
4135 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::outputStorage(oop entry) {
4136   return oop_cast<objArrayOop>(entry->obj_field(_outputStorage_offset));
4137 }
4138 
4139 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::volatileStorage(oop entry) {
4140   return oop_cast<objArrayOop>(entry->obj_field(_volatileStorage_offset));
4141 }
4142 
4143 jint jdk_internal_foreign_abi_ABIDescriptor::stackAlignment(oop entry) {
4144   return entry->int_field(_stackAlignment_offset);
4145 }
4146 
4147 jint jdk_internal_foreign_abi_ABIDescriptor::shadowSpace(oop entry) {
4148   return entry->int_field(_shadowSpace_offset);
4149 }
4150 
4151 oop jdk_internal_foreign_abi_ABIDescriptor::scratch1(oop entry) {
4152   return entry->obj_field(_scratch1_offset);
4153 }
4154 
4155 oop jdk_internal_foreign_abi_ABIDescriptor::scratch2(oop entry) {
4156   return entry->obj_field(_scratch2_offset);
4157 }
4158 
4159 int jdk_internal_foreign_abi_VMStorage::_type_offset;
4160 int jdk_internal_foreign_abi_VMStorage::_indexOrOffset_offset;
4161 int jdk_internal_foreign_abi_VMStorage::_segmentMaskOrSize_offset;
4162 int jdk_internal_foreign_abi_VMStorage::_debugName_offset;
4163 
4164 #define VMStorage_FIELDS_DO(macro) \
4165   macro(_type_offset,              k, "type",              byte_signature, false); \
4166   macro(_indexOrOffset_offset,     k, "indexOrOffset",     int_signature, false); \
4167   macro(_segmentMaskOrSize_offset, k, "segmentMaskOrSize", short_signature, false); \
4168   macro(_debugName_offset,         k, "debugName",         string_signature, false); \
4169 
4170 bool jdk_internal_foreign_abi_VMStorage::is_instance(oop obj) {
4171   return obj != nullptr && is_subclass(obj->klass());
4172 }
4173 
4174 void jdk_internal_foreign_abi_VMStorage::compute_offsets() {
4175   InstanceKlass* k = vmClasses::VMStorage_klass();
4176   VMStorage_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4177 }
4178 
4179 #if INCLUDE_CDS
4180 void jdk_internal_foreign_abi_VMStorage::serialize_offsets(SerializeClosure* f) {
4181   VMStorage_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4182 }
4183 #endif
4184 
4185 jbyte jdk_internal_foreign_abi_VMStorage::type(oop entry) {
4186   return entry->byte_field(_type_offset);
4187 }
4188 
4189 jint jdk_internal_foreign_abi_VMStorage::index_or_offset(oop entry) {
4190   return entry->int_field(_indexOrOffset_offset);
4191 }
4192 
4193 jshort jdk_internal_foreign_abi_VMStorage::segment_mask_or_size(oop entry) {
4194   return entry->short_field(_segmentMaskOrSize_offset);
4195 }
4196 
4197 oop jdk_internal_foreign_abi_VMStorage::debugName(oop entry) {
4198   return entry->obj_field(_debugName_offset);
4199 }
4200 
4201 int jdk_internal_foreign_abi_CallConv::_argRegs_offset;
4202 int jdk_internal_foreign_abi_CallConv::_retRegs_offset;
4203 
4204 #define CallConv_FIELDS_DO(macro) \
4205   macro(_argRegs_offset, k, "argRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4206   macro(_retRegs_offset, k, "retRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4207 
4208 bool jdk_internal_foreign_abi_CallConv::is_instance(oop obj) {
4209   return obj != nullptr && is_subclass(obj->klass());
4210 }
4211 
4212 void jdk_internal_foreign_abi_CallConv::compute_offsets() {
4213   InstanceKlass* k = vmClasses::CallConv_klass();
4214   CallConv_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4215 }
4216 
4217 #if INCLUDE_CDS
4218 void jdk_internal_foreign_abi_CallConv::serialize_offsets(SerializeClosure* f) {
4219   CallConv_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4220 }
4221 #endif
4222 
4223 objArrayOop jdk_internal_foreign_abi_CallConv::argRegs(oop entry) {
4224   return oop_cast<objArrayOop>(entry->obj_field(_argRegs_offset));
4225 }
4226 
4227 objArrayOop jdk_internal_foreign_abi_CallConv::retRegs(oop entry) {
4228   return oop_cast<objArrayOop>(entry->obj_field(_retRegs_offset));
4229 }
4230 
4231 oop java_lang_invoke_MethodHandle::type(oop mh) {
4232   return mh->obj_field(_type_offset);
4233 }
4234 
4235 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
4236   mh->obj_field_put(_type_offset, mtype);
4237 }
4238 
4239 oop java_lang_invoke_MethodHandle::form(oop mh) {
4240   assert(_form_offset != 0, "");
4241   return mh->obj_field(_form_offset);
4242 }
4243 
4244 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
4245   assert(_form_offset != 0, "");
4246   mh->obj_field_put(_form_offset, lform);
4247 }
4248 
4249 /// MemberName accessors
4250 
4251 oop java_lang_invoke_MemberName::clazz(oop mname) {
4252   assert(is_instance(mname), "wrong type");
4253   return mname->obj_field(_clazz_offset);
4254 }
4255 
4256 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
4257   assert(is_instance(mname), "wrong type");
4258   mname->obj_field_put(_clazz_offset, clazz);
4259 }
4260 
4261 oop java_lang_invoke_MemberName::name(oop mname) {
4262   assert(is_instance(mname), "wrong type");
4263   return mname->obj_field(_name_offset);
4264 }
4265 
4266 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
4267   assert(is_instance(mname), "wrong type");
4268   mname->obj_field_put(_name_offset, name);
4269 }
4270 
4271 oop java_lang_invoke_MemberName::type(oop mname) {
4272   assert(is_instance(mname), "wrong type");
4273   return mname->obj_field(_type_offset);
4274 }
4275 
4276 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
4277   assert(is_instance(mname), "wrong type");
4278   mname->obj_field_put(_type_offset, type);
4279 }
4280 
4281 int java_lang_invoke_MemberName::flags(oop mname) {
4282   assert(is_instance(mname), "wrong type");
4283   return mname->int_field(_flags_offset);
4284 }
4285 
4286 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
4287   assert(is_instance(mname), "wrong type");
4288   mname->int_field_put(_flags_offset, flags);
4289 }
4290 
4291 
4292 // Return vmtarget from ResolvedMethodName method field through indirection
4293 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
4294   assert(is_instance(mname), "wrong type");
4295   oop method = mname->obj_field(_method_offset);
4296   return method == nullptr ? nullptr : java_lang_invoke_ResolvedMethodName::vmtarget(method);
4297 }
4298 
4299 bool java_lang_invoke_MemberName::is_method(oop mname) {
4300   assert(is_instance(mname), "must be MemberName");
4301   return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
4302 }
4303 
4304 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
4305   assert(is_instance(mname), "wrong type");
4306   mname->obj_field_put(_method_offset, resolved_method);
4307 }
4308 
4309 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
4310   assert(is_instance(mname), "wrong type");
4311   return (intptr_t) mname->address_field(_vmindex_offset);
4312 }
4313 
4314 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
4315   assert(is_instance(mname), "wrong type");
4316   mname->address_field_put(_vmindex_offset, (address) index);
4317 }
4318 
4319 
4320 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
4321   assert(is_instance(resolved_method), "wrong type");
4322   Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
4323   assert(m->is_method(), "must be");
4324   return m;
4325 }
4326 
4327 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
4328 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
4329   assert(is_instance(resolved_method), "wrong type");
4330   resolved_method->address_field_put(_vmtarget_offset, (address)m);
4331 }
4332 
4333 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) {
4334   assert(is_instance(resolved_method), "wrong type");
4335   resolved_method->obj_field_put(_vmholder_offset, holder);
4336 }
4337 
4338 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
4339   const Method* method = m();
4340 
4341   // lookup ResolvedMethod oop in the table, or create a new one and intern it
4342   oop resolved_method = ResolvedMethodTable::find_method(method);
4343   if (resolved_method != nullptr) {
4344     return resolved_method;
4345   }
4346 
4347   InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4348   if (!k->is_initialized()) {
4349     k->initialize(CHECK_NULL);
4350   }
4351 
4352   oop new_resolved_method = k->allocate_instance(CHECK_NULL);
4353 
4354   NoSafepointVerifier nsv;
4355 
4356   if (method->is_old()) {
4357     method = (method->is_deleted()) ? Universe::throw_no_such_method_error() :
4358                                       method->get_new_method();
4359   }
4360 
4361   InstanceKlass* holder = method->method_holder();
4362 
4363   set_vmtarget(new_resolved_method, const_cast<Method*>(method));
4364   // Add a reference to the loader (actually mirror because hidden classes may not have
4365   // distinct loaders) to ensure the metadata is kept alive.
4366   // This mirror may be different than the one in clazz field.
4367   set_vmholder(new_resolved_method, holder->java_mirror());
4368 
4369   // Set flag in class to indicate this InstanceKlass has entries in the table
4370   // to avoid walking table during redefinition if none of the redefined classes
4371   // have any membernames in the table.
4372   holder->set_has_resolved_methods();
4373 
4374   return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method));
4375 }
4376 
4377 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
4378   assert(is_instance(lform), "wrong type");
4379   return lform->obj_field(_vmentry_offset);
4380 }
4381 
4382 
4383 // Support for java_lang_invoke_MethodType
4384 
4385 int java_lang_invoke_MethodType::_rtype_offset;
4386 int java_lang_invoke_MethodType::_ptypes_offset;
4387 
4388 #define METHODTYPE_FIELDS_DO(macro) \
4389   macro(_rtype_offset,  k, "rtype",  class_signature,       false); \
4390   macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
4391 
4392 void java_lang_invoke_MethodType::compute_offsets() {
4393   InstanceKlass* k = vmClasses::MethodType_klass();
4394   METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4395 }
4396 
4397 #if INCLUDE_CDS
4398 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
4399   METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4400 }
4401 #endif
4402 
4403 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
4404   st->print("(");
4405   objArrayOop pts = ptypes(mt);
4406   if (pts != nullptr) {
4407     for (int i = 0, limit = pts->length(); i < limit; i++) {
4408       java_lang_Class::print_signature(pts->obj_at(i), st);
4409     }
4410   } else {
4411     st->print("null");
4412   }
4413   st->print(")");
4414   oop rt = rtype(mt);
4415   if (rt != nullptr) {
4416     java_lang_Class::print_signature(rt, st);
4417   } else {
4418     st->print("null");
4419   }
4420 }
4421 
4422 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) {
4423   ResourceMark rm;
4424   stringStream buffer(128);
4425   print_signature(mt, &buffer);
4426   const char* sigstr =       buffer.base();
4427   int         siglen = (int) buffer.size();
4428   Symbol *name;
4429   if (!intern_if_not_found) {
4430     name = SymbolTable::probe(sigstr, siglen);
4431   } else {
4432     name = SymbolTable::new_symbol(sigstr, siglen);
4433   }
4434   return name;
4435 }
4436 
4437 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
4438   if (mt1 == mt2)
4439     return true;
4440   if (rtype(mt1) != rtype(mt2))
4441     return false;
4442   if (ptype_count(mt1) != ptype_count(mt2))
4443     return false;
4444   for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
4445     if (ptype(mt1, i) != ptype(mt2, i))
4446       return false;
4447   }
4448   return true;
4449 }
4450 
4451 oop java_lang_invoke_MethodType::rtype(oop mt) {
4452   assert(is_instance(mt), "must be a MethodType");
4453   return mt->obj_field(_rtype_offset);
4454 }
4455 
4456 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
4457   assert(is_instance(mt), "must be a MethodType");
4458   return (objArrayOop) mt->obj_field(_ptypes_offset);
4459 }
4460 
4461 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
4462   return ptypes(mt)->obj_at(idx);
4463 }
4464 
4465 int java_lang_invoke_MethodType::ptype_count(oop mt) {
4466   return ptypes(mt)->length();
4467 }
4468 
4469 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
4470   objArrayOop pts = ptypes(mt);
4471   int count = pts->length();
4472   int slots = 0;
4473   for (int i = 0; i < count; i++) {
4474     BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
4475     slots += type2size[bt];
4476   }
4477   return slots;
4478 }
4479 
4480 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
4481   BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
4482   return type2size[bt];
4483 }
4484 
4485 
4486 // Support for java_lang_invoke_CallSite
4487 
4488 int java_lang_invoke_CallSite::_target_offset;
4489 int java_lang_invoke_CallSite::_context_offset;
4490 
4491 #define CALLSITE_FIELDS_DO(macro) \
4492   macro(_target_offset,  k, "target", java_lang_invoke_MethodHandle_signature, false); \
4493   macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false)
4494 
4495 void java_lang_invoke_CallSite::compute_offsets() {
4496   InstanceKlass* k = vmClasses::CallSite_klass();
4497   CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4498 }
4499 
4500 #if INCLUDE_CDS
4501 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
4502   CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4503 }
4504 #endif
4505 
4506 oop java_lang_invoke_CallSite::context_no_keepalive(oop call_site) {
4507   assert(java_lang_invoke_CallSite::is_instance(call_site), "");
4508 
4509   oop dep_oop = call_site->obj_field_access<AS_NO_KEEPALIVE>(_context_offset);
4510   return dep_oop;
4511 }
4512 
4513 // Support for java_lang_invoke_ConstantCallSite
4514 
4515 int java_lang_invoke_ConstantCallSite::_is_frozen_offset;
4516 
4517 #define CONSTANTCALLSITE_FIELDS_DO(macro) \
4518   macro(_is_frozen_offset, k, "isFrozen", bool_signature, false)
4519 
4520 void java_lang_invoke_ConstantCallSite::compute_offsets() {
4521   InstanceKlass* k = vmClasses::ConstantCallSite_klass();
4522   CONSTANTCALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4523 }
4524 
4525 #if INCLUDE_CDS
4526 void java_lang_invoke_ConstantCallSite::serialize_offsets(SerializeClosure* f) {
4527   CONSTANTCALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4528 }
4529 #endif
4530 
4531 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext
4532 
4533 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset;
4534 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_last_cleanup_offset;
4535 
4536 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() {
4537   InstanceKlass* k = vmClasses::Context_klass();
4538   CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4539 }
4540 
4541 #if INCLUDE_CDS
4542 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) {
4543   CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4544 }
4545 #endif
4546 
4547 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) {
4548   assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
4549   nmethodBucket* volatile* vmdeps_addr = call_site->field_addr<nmethodBucket* volatile>(_vmdependencies_offset);
4550   volatile uint64_t* last_cleanup_addr = call_site->field_addr<volatile uint64_t>(_last_cleanup_offset);
4551   DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr);
4552   return dep_ctx;
4553 }
4554 
4555 // Support for java_security_AccessControlContext
4556 
4557 int java_security_AccessControlContext::_context_offset;
4558 int java_security_AccessControlContext::_privilegedContext_offset;
4559 int java_security_AccessControlContext::_isPrivileged_offset;
4560 int java_security_AccessControlContext::_isAuthorized_offset;
4561 
4562 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \
4563   macro(_context_offset,           k, "context",      protectiondomain_signature, false); \
4564   macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \
4565   macro(_isPrivileged_offset,      k, "isPrivileged", bool_signature, false); \
4566   macro(_isAuthorized_offset,      k, "isAuthorized", bool_signature, false)
4567 
4568 void java_security_AccessControlContext::compute_offsets() {
4569   assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
4570   InstanceKlass* k = vmClasses::AccessControlContext_klass();
4571   ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4572 }
4573 
4574 #if INCLUDE_CDS
4575 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) {
4576   ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4577 }
4578 #endif
4579 
4580 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
4581   assert(_isPrivileged_offset != 0, "offsets should have been initialized");
4582   assert(_isAuthorized_offset != 0, "offsets should have been initialized");
4583   // Ensure klass is initialized
4584   vmClasses::AccessControlContext_klass()->initialize(CHECK_NULL);
4585   // Allocate result
4586   oop result = vmClasses::AccessControlContext_klass()->allocate_instance(CHECK_NULL);
4587   // Fill in values
4588   result->obj_field_put(_context_offset, context());
4589   result->obj_field_put(_privilegedContext_offset, privileged_context());
4590   result->bool_field_put(_isPrivileged_offset, isPrivileged);
4591   result->bool_field_put(_isAuthorized_offset, true);
4592   return result;
4593 }
4594 
4595 
4596 // Support for java_lang_ClassLoader
4597 
4598 int  java_lang_ClassLoader::_loader_data_offset;
4599 int  java_lang_ClassLoader::_parallelCapable_offset;
4600 int  java_lang_ClassLoader::_name_offset;
4601 int  java_lang_ClassLoader::_nameAndId_offset;
4602 int  java_lang_ClassLoader::_unnamedModule_offset;
4603 int  java_lang_ClassLoader::_parent_offset;
4604 
4605 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
4606   assert(loader != nullptr, "loader must not be null");
4607   assert(oopDesc::is_oop(loader), "loader must be oop");
4608   return Atomic::load_acquire(loader->field_addr<ClassLoaderData*>(_loader_data_offset));
4609 }
4610 
4611 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
4612   assert(loader != nullptr, "loader must not be null");
4613   assert(oopDesc::is_oop(loader), "loader must be oop");
4614   return *loader->field_addr<ClassLoaderData*>(_loader_data_offset);
4615 }
4616 
4617 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
4618   assert(loader != nullptr, "loader must not be null");
4619   assert(oopDesc::is_oop(loader), "loader must be oop");
4620   Atomic::release_store(loader->field_addr<ClassLoaderData*>(_loader_data_offset), new_data);
4621 }
4622 
4623 #define CLASSLOADER_FIELDS_DO(macro) \
4624   macro(_parallelCapable_offset, k1, "parallelLockMap",      concurrenthashmap_signature, false); \
4625   macro(_name_offset,            k1, vmSymbols::name_name(), string_signature, false); \
4626   macro(_nameAndId_offset,       k1, "nameAndId",            string_signature, false); \
4627   macro(_unnamedModule_offset,   k1, "unnamedModule",        module_signature, false); \
4628   macro(_parent_offset,          k1, "parent",               classloader_signature, false)
4629 
4630 void java_lang_ClassLoader::compute_offsets() {
4631   InstanceKlass* k1 = vmClasses::ClassLoader_klass();
4632   CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4633 
4634   CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4635 }
4636 
4637 #if INCLUDE_CDS
4638 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
4639   CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4640   CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4641 }
4642 #endif
4643 
4644 oop java_lang_ClassLoader::parent(oop loader) {
4645   assert(is_instance(loader), "loader must be oop");
4646   return loader->obj_field(_parent_offset);
4647 }
4648 
4649 oop java_lang_ClassLoader::parent_no_keepalive(oop loader) {
4650   assert(is_instance(loader), "loader must be oop");
4651   return loader->obj_field_access<AS_NO_KEEPALIVE>(_parent_offset);
4652 }
4653 
4654 // Returns the name field of this class loader.  If the name field has not
4655 // been set, null will be returned.
4656 oop java_lang_ClassLoader::name(oop loader) {
4657   assert(is_instance(loader), "loader must be oop");
4658   return loader->obj_field(_name_offset);
4659 }
4660 
4661 // Returns the nameAndId field of this class loader. The format is
4662 // as follows:
4663 //   If the defining loader has a name explicitly set then '<loader-name>' @<id>
4664 //   If the defining loader has no name then <qualified-class-name> @<id>
4665 //   If built-in loader, then omit '@<id>' as there is only one instance.
4666 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
4667 oop java_lang_ClassLoader::nameAndId(oop loader) {
4668   assert(is_instance(loader), "loader must be oop");
4669   return loader->obj_field(_nameAndId_offset);
4670 }
4671 
4672 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
4673   assert(is_instance(loader), "loader must be oop");
4674   assert(cl == nullptr || is_instance(cl), "cl argument must be oop");
4675   oop acl = loader;
4676   debug_only(jint loop_count = 0);
4677   // This loop taken verbatim from ClassLoader.java:
4678   do {
4679     acl = parent(acl);
4680     if (cl == acl) {
4681       return true;
4682     }
4683     assert(++loop_count > 0, "loop_count overflow");
4684   } while (acl != nullptr);
4685   return false;
4686 }
4687 
4688 bool java_lang_ClassLoader::is_instance(oop obj) {
4689   return obj != nullptr && is_subclass(obj->klass());
4690 }
4691 
4692 
4693 // For class loader classes, parallelCapable defined
4694 // based on non-null field
4695 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
4696 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
4697   assert(_parallelCapable_offset != 0, "offsets should have been initialized");
4698   return (class_loader->obj_field(_parallelCapable_offset) != nullptr);
4699 }
4700 
4701 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
4702   // Fix for 4474172; see evaluation for more details
4703   loader = non_reflection_class_loader(loader);
4704 
4705   oop cl = SystemDictionary::java_system_loader();
4706   while(cl != nullptr) {
4707     if (cl == loader) return true;
4708     cl = parent(cl);
4709   }
4710   return false;
4711 }
4712 
4713 // Return true if this is one of the class loaders associated with
4714 // the generated bytecodes for serialization constructor returned
4715 // by sun.reflect.ReflectionFactory::newConstructorForSerialization
4716 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) {
4717   if (loader != nullptr) {
4718     Klass* delegating_cl_class = vmClasses::reflect_DelegatingClassLoader_klass();
4719     // This might be null in non-1.4 JDKs
4720     return (delegating_cl_class != nullptr && loader->is_a(delegating_cl_class));
4721   }
4722   return false;
4723 }
4724 
4725 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
4726   // See whether this is one of the class loaders associated with
4727   // the generated bytecodes for reflection, and if so, "magically"
4728   // delegate to its parent to prevent class loading from occurring
4729   // in places where applications using reflection didn't expect it.
4730   if (is_reflection_class_loader(loader)) {
4731     return parent(loader);
4732   }
4733   return loader;
4734 }
4735 
4736 oop java_lang_ClassLoader::unnamedModule(oop loader) {
4737   assert(is_instance(loader), "loader must be oop");
4738   return loader->obj_field(_unnamedModule_offset);
4739 }
4740 
4741 // Support for java_lang_System
4742 //
4743 
4744 int java_lang_System::_static_in_offset;
4745 int java_lang_System::_static_out_offset;
4746 int java_lang_System::_static_err_offset;
4747 int java_lang_System::_static_security_offset;
4748 int java_lang_System::_static_allow_security_offset;
4749 int java_lang_System::_static_never_offset;
4750 
4751 #define SYSTEM_FIELDS_DO(macro) \
4752   macro(_static_in_offset,  k, "in",  input_stream_signature, true); \
4753   macro(_static_out_offset, k, "out", print_stream_signature, true); \
4754   macro(_static_err_offset, k, "err", print_stream_signature, true); \
4755   macro(_static_security_offset, k, "security", security_manager_signature, true); \
4756   macro(_static_allow_security_offset, k, "allowSecurityManager", int_signature, true); \
4757   macro(_static_never_offset, k, "NEVER", int_signature, true)
4758 
4759 void java_lang_System::compute_offsets() {
4760   InstanceKlass* k = vmClasses::System_klass();
4761   SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4762 }
4763 
4764 // This field tells us that a security manager can never be installed so we
4765 // can completely skip populating the ProtectionDomainCacheTable.
4766 bool java_lang_System::allow_security_manager() {
4767   static int initialized = false;
4768   static bool allowed = true; // default
4769   if (!initialized) {
4770     oop base = vmClasses::System_klass()->static_field_base_raw();
4771     int never = base->int_field(_static_never_offset);
4772     allowed = (base->int_field(_static_allow_security_offset) != never);
4773     initialized = true;
4774   }
4775   return allowed;
4776 }
4777 
4778 // This field tells us that a security manager is installed.
4779 bool java_lang_System::has_security_manager() {
4780   oop base = vmClasses::System_klass()->static_field_base_raw();
4781   return base->obj_field(_static_security_offset) != nullptr;
4782 }
4783 
4784 #if INCLUDE_CDS
4785 void java_lang_System::serialize_offsets(SerializeClosure* f) {
4786    SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4787 }
4788 #endif
4789 
4790 // Support for jdk_internal_misc_UnsafeConstants
4791 //
4792 class UnsafeConstantsFixup : public FieldClosure {
4793 private:
4794   int _address_size;
4795   int _page_size;
4796   bool _big_endian;
4797   bool _use_unaligned_access;
4798   int _data_cache_line_flush_size;
4799 public:
4800   UnsafeConstantsFixup() {
4801     // round up values for all static final fields
4802     _address_size = sizeof(void*);
4803     _page_size = AIX_ONLY(sysconf(_SC_PAGESIZE)) NOT_AIX((int)os::vm_page_size());
4804     _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true);
4805     _use_unaligned_access = UseUnalignedAccesses;
4806     _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size();
4807   }
4808 
4809   void do_field(fieldDescriptor* fd) {
4810     oop mirror = fd->field_holder()->java_mirror();
4811     assert(mirror != nullptr, "UnsafeConstants must have mirror already");
4812     assert(fd->field_holder() == vmClasses::UnsafeConstants_klass(), "Should be UnsafeConstants");
4813     assert(fd->is_final(), "fields of UnsafeConstants must be final");
4814     assert(fd->is_static(), "fields of UnsafeConstants must be static");
4815     if (fd->name() == vmSymbols::address_size_name()) {
4816       mirror->int_field_put(fd->offset(), _address_size);
4817     } else if (fd->name() == vmSymbols::page_size_name()) {
4818       mirror->int_field_put(fd->offset(), _page_size);
4819     } else if (fd->name() == vmSymbols::big_endian_name()) {
4820       mirror->bool_field_put(fd->offset(), _big_endian);
4821     } else if (fd->name() == vmSymbols::use_unaligned_access_name()) {
4822       mirror->bool_field_put(fd->offset(), _use_unaligned_access);
4823     } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) {
4824       mirror->int_field_put(fd->offset(), _data_cache_line_flush_size);
4825     } else {
4826       assert(false, "unexpected UnsafeConstants field");
4827     }
4828   }
4829 };
4830 
4831 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() {
4832   UnsafeConstantsFixup fixup;
4833   vmClasses::UnsafeConstants_klass()->do_local_static_fields(&fixup);
4834 }
4835 
4836 
4837 // java_lang_StackTraceElement
4838 
4839 int java_lang_StackTraceElement::_methodName_offset;
4840 int java_lang_StackTraceElement::_fileName_offset;
4841 int java_lang_StackTraceElement::_lineNumber_offset;
4842 int java_lang_StackTraceElement::_moduleName_offset;
4843 int java_lang_StackTraceElement::_moduleVersion_offset;
4844 int java_lang_StackTraceElement::_classLoaderName_offset;
4845 int java_lang_StackTraceElement::_declaringClass_offset;
4846 int java_lang_StackTraceElement::_declaringClassObject_offset;
4847 
4848 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4849   macro(_declaringClassObject_offset,  k, "declaringClassObject", class_signature, false); \
4850   macro(_classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4851   macro(_moduleName_offset,      k, "moduleName",      string_signature, false); \
4852   macro(_moduleVersion_offset,   k, "moduleVersion",   string_signature, false); \
4853   macro(_declaringClass_offset,  k, "declaringClass",  string_signature, false); \
4854   macro(_methodName_offset,      k, "methodName",      string_signature, false); \
4855   macro(_fileName_offset,        k, "fileName",        string_signature, false); \
4856   macro(_lineNumber_offset,      k, "lineNumber",      int_signature,    false)
4857 
4858 // Support for java_lang_StackTraceElement
4859 void java_lang_StackTraceElement::compute_offsets() {
4860   InstanceKlass* k = vmClasses::StackTraceElement_klass();
4861   STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4862 }
4863 
4864 #if INCLUDE_CDS
4865 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
4866   STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4867 }
4868 #endif
4869 
4870 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
4871   element->obj_field_put(_fileName_offset, value);
4872 }
4873 
4874 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
4875   element->obj_field_put(_declaringClass_offset, value);
4876 }
4877 
4878 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
4879   element->obj_field_put(_methodName_offset, value);
4880 }
4881 
4882 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
4883   element->int_field_put(_lineNumber_offset, value);
4884 }
4885 
4886 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
4887   element->obj_field_put(_moduleName_offset, value);
4888 }
4889 
4890 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
4891   element->obj_field_put(_moduleVersion_offset, value);
4892 }
4893 
4894 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
4895   element->obj_field_put(_classLoaderName_offset, value);
4896 }
4897 
4898 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
4899   element->obj_field_put(_declaringClassObject_offset, value);
4900 }
4901 
4902 
4903 // java_lang_AssertionStatusDirectives
4904 
4905 int java_lang_AssertionStatusDirectives::_classes_offset;
4906 int java_lang_AssertionStatusDirectives::_classEnabled_offset;
4907 int java_lang_AssertionStatusDirectives::_packages_offset;
4908 int java_lang_AssertionStatusDirectives::_packageEnabled_offset;
4909 int java_lang_AssertionStatusDirectives::_deflt_offset;
4910 
4911 // Support for java Assertions - java_lang_AssertionStatusDirectives.
4912 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
4913   macro(_classes_offset,        k, "classes",        string_array_signature, false); \
4914   macro(_classEnabled_offset,   k, "classEnabled",   bool_array_signature, false); \
4915   macro(_packages_offset,       k, "packages",       string_array_signature, false); \
4916   macro(_packageEnabled_offset, k, "packageEnabled", bool_array_signature,   false); \
4917   macro(_deflt_offset,          k, "deflt",          bool_signature,         false)
4918 
4919 void java_lang_AssertionStatusDirectives::compute_offsets() {
4920   InstanceKlass* k = vmClasses::AssertionStatusDirectives_klass();
4921   ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4922 }
4923 
4924 #if INCLUDE_CDS
4925 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
4926   ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4927 }
4928 #endif
4929 
4930 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
4931   o->obj_field_put(_classes_offset, val);
4932 }
4933 
4934 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
4935   o->obj_field_put(_classEnabled_offset, val);
4936 }
4937 
4938 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
4939   o->obj_field_put(_packages_offset, val);
4940 }
4941 
4942 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
4943   o->obj_field_put(_packageEnabled_offset, val);
4944 }
4945 
4946 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
4947   o->bool_field_put(_deflt_offset, val);
4948 }
4949 
4950 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
4951 
4952 #define AOS_FIELDS_DO(macro) \
4953   macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
4954 
4955 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
4956   InstanceKlass* k = vmClasses::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
4957   AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4958 }
4959 
4960 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
4961   assert(_owner_offset != 0, "Must be initialized");
4962   return obj->obj_field(_owner_offset);
4963 }
4964 
4965 #if INCLUDE_CDS
4966 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
4967   AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4968 }
4969 #endif
4970 
4971 int vector_VectorPayload::_payload_offset;
4972 
4973 #define VECTORPAYLOAD_FIELDS_DO(macro) \
4974   macro(_payload_offset, k, "payload", object_signature, false)
4975 
4976 void vector_VectorPayload::compute_offsets() {
4977   InstanceKlass* k = vmClasses::vector_VectorPayload_klass();
4978   VECTORPAYLOAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4979 }
4980 
4981 #if INCLUDE_CDS
4982 void vector_VectorPayload::serialize_offsets(SerializeClosure* f) {
4983   VECTORPAYLOAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4984 }
4985 #endif
4986 
4987 void vector_VectorPayload::set_payload(oop o, oop val) {
4988   o->obj_field_put(_payload_offset, val);
4989 }
4990 
4991 bool vector_VectorPayload::is_instance(oop obj) {
4992   return obj != nullptr && is_subclass(obj->klass());
4993 }
4994 
4995 int java_lang_Integer_IntegerCache::_static_cache_offset;
4996 int java_lang_Long_LongCache::_static_cache_offset;
4997 int java_lang_Character_CharacterCache::_static_cache_offset;
4998 int java_lang_Short_ShortCache::_static_cache_offset;
4999 int java_lang_Byte_ByteCache::_static_cache_offset;
5000 
5001 #define INTEGER_CACHE_FIELDS_DO(macro) \
5002   macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true)
5003 
5004 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) {
5005   guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5006   INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5007 }
5008 
5009 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) {
5010   oop base = ik->static_field_base_raw();
5011   return objArrayOop(base->obj_field(_static_cache_offset));
5012 }
5013 
5014 Symbol* java_lang_Integer_IntegerCache::symbol() {
5015   return vmSymbols::java_lang_Integer_IntegerCache();
5016 }
5017 
5018 #if INCLUDE_CDS
5019 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) {
5020   INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5021 }
5022 #endif
5023 #undef INTEGER_CACHE_FIELDS_DO
5024 
5025 jint java_lang_Integer::value(oop obj) {
5026    jvalue v;
5027    java_lang_boxing_object::get_value(obj, &v);
5028    return v.i;
5029 }
5030 
5031 #define LONG_CACHE_FIELDS_DO(macro) \
5032   macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true)
5033 
5034 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) {
5035   guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5036   LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5037 }
5038 
5039 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) {
5040   oop base = ik->static_field_base_raw();
5041   return objArrayOop(base->obj_field(_static_cache_offset));
5042 }
5043 
5044 Symbol* java_lang_Long_LongCache::symbol() {
5045   return vmSymbols::java_lang_Long_LongCache();
5046 }
5047 
5048 #if INCLUDE_CDS
5049 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) {
5050   LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5051 }
5052 #endif
5053 #undef LONG_CACHE_FIELDS_DO
5054 
5055 jlong java_lang_Long::value(oop obj) {
5056    jvalue v;
5057    java_lang_boxing_object::get_value(obj, &v);
5058    return v.j;
5059 }
5060 
5061 #define CHARACTER_CACHE_FIELDS_DO(macro) \
5062   macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true)
5063 
5064 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) {
5065   guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5066   CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5067 }
5068 
5069 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) {
5070   oop base = ik->static_field_base_raw();
5071   return objArrayOop(base->obj_field(_static_cache_offset));
5072 }
5073 
5074 Symbol* java_lang_Character_CharacterCache::symbol() {
5075   return vmSymbols::java_lang_Character_CharacterCache();
5076 }
5077 
5078 #if INCLUDE_CDS
5079 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) {
5080   CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5081 }
5082 #endif
5083 #undef CHARACTER_CACHE_FIELDS_DO
5084 
5085 jchar java_lang_Character::value(oop obj) {
5086    jvalue v;
5087    java_lang_boxing_object::get_value(obj, &v);
5088    return v.c;
5089 }
5090 
5091 #define SHORT_CACHE_FIELDS_DO(macro) \
5092   macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true)
5093 
5094 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) {
5095   guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5096   SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5097 }
5098 
5099 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) {
5100   oop base = ik->static_field_base_raw();
5101   return objArrayOop(base->obj_field(_static_cache_offset));
5102 }
5103 
5104 Symbol* java_lang_Short_ShortCache::symbol() {
5105   return vmSymbols::java_lang_Short_ShortCache();
5106 }
5107 
5108 #if INCLUDE_CDS
5109 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) {
5110   SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5111 }
5112 #endif
5113 #undef SHORT_CACHE_FIELDS_DO
5114 
5115 jshort java_lang_Short::value(oop obj) {
5116    jvalue v;
5117    java_lang_boxing_object::get_value(obj, &v);
5118    return v.s;
5119 }
5120 
5121 #define BYTE_CACHE_FIELDS_DO(macro) \
5122   macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true)
5123 
5124 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) {
5125   guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5126   BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5127 }
5128 
5129 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) {
5130   oop base = ik->static_field_base_raw();
5131   return objArrayOop(base->obj_field(_static_cache_offset));
5132 }
5133 
5134 Symbol* java_lang_Byte_ByteCache::symbol() {
5135   return vmSymbols::java_lang_Byte_ByteCache();
5136 }
5137 
5138 #if INCLUDE_CDS
5139 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) {
5140   BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5141 }
5142 #endif
5143 #undef BYTE_CACHE_FIELDS_DO
5144 
5145 jbyte java_lang_Byte::value(oop obj) {
5146    jvalue v;
5147    java_lang_boxing_object::get_value(obj, &v);
5148    return v.b;
5149 }
5150 
5151 int java_lang_Boolean::_static_TRUE_offset;
5152 int java_lang_Boolean::_static_FALSE_offset;
5153 
5154 #define BOOLEAN_FIELDS_DO(macro) \
5155   macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \
5156   macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true)
5157 
5158 
5159 void java_lang_Boolean::compute_offsets(InstanceKlass *k) {
5160   guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5161   BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5162 }
5163 
5164 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) {
5165   oop base = ik->static_field_base_raw();
5166   return base->obj_field(_static_TRUE_offset);
5167 }
5168 
5169 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) {
5170   oop base = ik->static_field_base_raw();
5171   return base->obj_field(_static_FALSE_offset);
5172 }
5173 
5174 Symbol* java_lang_Boolean::symbol() {
5175   return vmSymbols::java_lang_Boolean();
5176 }
5177 
5178 #if INCLUDE_CDS
5179 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) {
5180   BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5181 }
5182 #endif
5183 #undef BOOLEAN_CACHE_FIELDS_DO
5184 
5185 jboolean java_lang_Boolean::value(oop obj) {
5186    jvalue v;
5187    java_lang_boxing_object::get_value(obj, &v);
5188    return v.z;
5189 }
5190 
5191 // java_lang_reflect_RecordComponent
5192 
5193 int java_lang_reflect_RecordComponent::_clazz_offset;
5194 int java_lang_reflect_RecordComponent::_name_offset;
5195 int java_lang_reflect_RecordComponent::_type_offset;
5196 int java_lang_reflect_RecordComponent::_accessor_offset;
5197 int java_lang_reflect_RecordComponent::_signature_offset;
5198 int java_lang_reflect_RecordComponent::_annotations_offset;
5199 int java_lang_reflect_RecordComponent::_typeAnnotations_offset;
5200 
5201 #define RECORDCOMPONENT_FIELDS_DO(macro) \
5202   macro(_clazz_offset,       k, "clazz",       class_signature,  false); \
5203   macro(_name_offset,        k, "name",        string_signature, false); \
5204   macro(_type_offset,        k, "type",        class_signature,  false); \
5205   macro(_accessor_offset,    k, "accessor",    reflect_method_signature, false); \
5206   macro(_signature_offset,   k, "signature",   string_signature, false); \
5207   macro(_annotations_offset, k, "annotations", byte_array_signature,     false); \
5208   macro(_typeAnnotations_offset, k, "typeAnnotations", byte_array_signature, false);
5209 
5210 // Support for java_lang_reflect_RecordComponent
5211 void java_lang_reflect_RecordComponent::compute_offsets() {
5212   InstanceKlass* k = vmClasses::RecordComponent_klass();
5213   RECORDCOMPONENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5214 }
5215 
5216 #if INCLUDE_CDS
5217 void java_lang_reflect_RecordComponent::serialize_offsets(SerializeClosure* f) {
5218   RECORDCOMPONENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5219 }
5220 #endif
5221 
5222 void java_lang_reflect_RecordComponent::set_clazz(oop element, oop value) {
5223   element->obj_field_put(_clazz_offset, value);
5224 }
5225 
5226 void java_lang_reflect_RecordComponent::set_name(oop element, oop value) {
5227   element->obj_field_put(_name_offset, value);
5228 }
5229 
5230 void java_lang_reflect_RecordComponent::set_type(oop element, oop value) {
5231   element->obj_field_put(_type_offset, value);
5232 }
5233 
5234 void java_lang_reflect_RecordComponent::set_accessor(oop element, oop value) {
5235   element->obj_field_put(_accessor_offset, value);
5236 }
5237 
5238 void java_lang_reflect_RecordComponent::set_signature(oop element, oop value) {
5239   element->obj_field_put(_signature_offset, value);
5240 }
5241 
5242 void java_lang_reflect_RecordComponent::set_annotations(oop element, oop value) {
5243   element->obj_field_put(_annotations_offset, value);
5244 }
5245 
5246 void java_lang_reflect_RecordComponent::set_typeAnnotations(oop element, oop value) {
5247   element->obj_field_put(_typeAnnotations_offset, value);
5248 }
5249 
5250 // java_lang_InternalError
5251 int java_lang_InternalError::_during_unsafe_access_offset;
5252 
5253 void java_lang_InternalError::set_during_unsafe_access(oop internal_error) {
5254   internal_error->bool_field_put(_during_unsafe_access_offset, true);
5255 }
5256 
5257 jboolean java_lang_InternalError::during_unsafe_access(oop internal_error) {
5258   return internal_error->bool_field(_during_unsafe_access_offset);
5259 }
5260 
5261 void java_lang_InternalError::compute_offsets() {
5262   INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
5263 }
5264 
5265 #if INCLUDE_CDS
5266 void java_lang_InternalError::serialize_offsets(SerializeClosure* f) {
5267   INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
5268 }
5269 #endif
5270 
5271 #define BASIC_JAVA_CLASSES_DO_PART1(f) \
5272   f(java_lang_Class) \
5273   f(java_lang_String) \
5274   f(java_lang_ref_Reference) \
5275   //end
5276 
5277 #define BASIC_JAVA_CLASSES_DO_PART2(f) \
5278   f(java_lang_System) \
5279   f(java_lang_ClassLoader) \
5280   f(java_lang_Throwable) \
5281   f(java_lang_Thread) \
5282   f(java_lang_Thread_FieldHolder) \
5283   f(java_lang_Thread_Constants) \
5284   f(java_lang_ThreadGroup) \
5285   f(java_lang_VirtualThread) \
5286   f(java_lang_InternalError) \
5287   f(java_lang_AssertionStatusDirectives) \
5288   f(java_lang_ref_SoftReference) \
5289   f(java_lang_invoke_MethodHandle) \
5290   f(java_lang_invoke_DirectMethodHandle) \
5291   f(java_lang_invoke_MemberName) \
5292   f(java_lang_invoke_ResolvedMethodName) \
5293   f(java_lang_invoke_LambdaForm) \
5294   f(java_lang_invoke_MethodType) \
5295   f(java_lang_invoke_CallSite) \
5296   f(java_lang_invoke_ConstantCallSite) \
5297   f(java_lang_invoke_MethodHandleNatives_CallSiteContext) \
5298   f(java_security_AccessControlContext) \
5299   f(java_lang_reflect_AccessibleObject) \
5300   f(java_lang_reflect_Method) \
5301   f(java_lang_reflect_Constructor) \
5302   f(java_lang_reflect_Field) \
5303   f(java_lang_reflect_RecordComponent) \
5304   f(reflect_ConstantPool) \
5305   f(java_lang_reflect_Parameter) \
5306   f(java_lang_Module) \
5307   f(java_lang_StackTraceElement) \
5308   f(java_lang_ClassFrameInfo) \
5309   f(java_lang_StackFrameInfo) \
5310   f(java_lang_LiveStackFrameInfo) \
5311   f(jdk_internal_vm_ContinuationScope) \
5312   f(jdk_internal_vm_Continuation) \
5313   f(jdk_internal_vm_StackChunk) \
5314   f(java_util_concurrent_locks_AbstractOwnableSynchronizer) \
5315   f(jdk_internal_foreign_abi_NativeEntryPoint) \
5316   f(jdk_internal_foreign_abi_ABIDescriptor) \
5317   f(jdk_internal_foreign_abi_VMStorage) \
5318   f(jdk_internal_foreign_abi_CallConv) \
5319   f(jdk_internal_misc_UnsafeConstants) \
5320   f(java_lang_boxing_object) \
5321   f(vector_VectorPayload) \
5322   //end
5323 
5324 #define BASIC_JAVA_CLASSES_DO(f) \
5325         BASIC_JAVA_CLASSES_DO_PART1(f) \
5326         BASIC_JAVA_CLASSES_DO_PART2(f)
5327 
5328 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
5329 
5330 // Compute field offsets of all the classes in this file
5331 void JavaClasses::compute_offsets() {
5332   if (UseSharedSpaces) {
5333     JVMTI_ONLY(assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
5334                                                          JvmtiExport::has_early_class_hook_env()),
5335                       "JavaClasses::compute_offsets() must be called in early JVMTI phase."));
5336     // None of the classes used by the rest of this function can be replaced by
5337     // JVMTI ClassFileLoadHook.
5338     // We are safe to use the archived offsets, which have already been restored
5339     // by JavaClasses::serialize_offsets, without computing the offsets again.
5340     return;
5341   }
5342 
5343   // We have already called the compute_offsets() of the
5344   // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String, java_lang_Class and
5345   // java_lang_ref_Reference) earlier inside vmClasses::resolve_all()
5346   BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
5347 }
5348 
5349 #if INCLUDE_CDS
5350 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
5351 
5352 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
5353   BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
5354 }
5355 #endif
5356 
5357 #if INCLUDE_CDS_JAVA_HEAP
5358 bool JavaClasses::is_supported_for_archiving(oop obj) {
5359   Klass* klass = obj->klass();
5360 
5361   if (klass == vmClasses::ClassLoader_klass() ||  // ClassLoader::loader_data is malloc'ed.
5362       // The next 3 classes are used to implement java.lang.invoke, and are not used directly in
5363       // regular Java code. The implementation of java.lang.invoke uses generated hidden classes
5364       // (e.g., as referenced by ResolvedMethodName::vmholder) that are not yet supported by CDS.
5365       // So for now we cannot not support these classes for archiving.
5366       //
5367       // These objects typically are not referenced by static fields, but rather by resolved
5368       // constant pool entries, so excluding them shouldn't affect the archiving of static fields.
5369       klass == vmClasses::ResolvedMethodName_klass() ||
5370       klass == vmClasses::MemberName_klass() ||
5371       klass == vmClasses::Context_klass() ||
5372       // It's problematic to archive Reference objects. One of the reasons is that
5373       // Reference::discovered may pull in unwanted objects (see JDK-8284336)
5374       klass->is_subclass_of(vmClasses::Reference_klass())) {
5375     return false;
5376   }
5377 
5378   return true;
5379 }
5380 #endif
5381 
5382 #ifndef PRODUCT
5383 
5384 // These functions exist to assert the validity of de-serialized offsets in boxing object as a sanity check.
5385 
5386 bool JavaClasses::check_offset(const char *klass_name, int deserialized_offset, const char *field_name,
5387                                const char* field_sig) {
5388   EXCEPTION_MARK;
5389   fieldDescriptor fd;
5390   TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name);
5391   Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
5392   InstanceKlass* ik = InstanceKlass::cast(k);
5393   TempNewSymbol f_name = SymbolTable::new_symbol(field_name);
5394   TempNewSymbol f_sig  = SymbolTable::new_symbol(field_sig);
5395   if (!ik->find_local_field(f_name, f_sig, &fd)) {
5396     tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
5397     return false;
5398   }
5399   if (fd.is_static()) {
5400     tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
5401     return false;
5402   }
5403   if (fd.offset() == deserialized_offset ) {
5404     return true;
5405   } else {
5406     tty->print_cr("Offset of nonstatic field %s.%s is deserialized as %d but should really be %d.",
5407                   klass_name, field_name, deserialized_offset, fd.offset());
5408     return false;
5409   }
5410 }
5411 
5412 void JavaClasses::check_offsets() {
5413   bool valid = true;
5414 
5415 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5416   valid &= check_offset(klass_name, cpp_klass_name :: _##field_name ## _offset, #field_name, field_sig)
5417 
5418 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5419   valid &= check_offset(klass_name, cpp_klass_name :: _##long_ ## field_name ## _offset, #field_name, field_sig)
5420 
5421   // Boxed primitive objects (java_lang_boxing_object)
5422 
5423   CHECK_OFFSET("java/lang/Boolean",   java_lang_boxing_object, value, "Z");
5424   CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
5425   CHECK_OFFSET("java/lang/Float",     java_lang_boxing_object, value, "F");
5426   CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
5427   CHECK_OFFSET("java/lang/Byte",      java_lang_boxing_object, value, "B");
5428   CHECK_OFFSET("java/lang/Short",     java_lang_boxing_object, value, "S");
5429   CHECK_OFFSET("java/lang/Integer",   java_lang_boxing_object, value, "I");
5430   CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
5431 
5432   if (!valid) vm_exit_during_initialization("Field offset verification failed");
5433 }
5434 
5435 #endif // PRODUCT
5436 
5437 int InjectedField::compute_offset() {
5438   InstanceKlass* ik = InstanceKlass::cast(klass());
5439   for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5440     if (!may_be_java && !fs.field_flags().is_injected()) {
5441       // Only look at injected fields
5442       continue;
5443     }
5444     if (fs.name() == name() && fs.signature() == signature()) {
5445       return fs.offset();
5446     }
5447   }
5448   ResourceMark rm;
5449   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)" : "");
5450 #ifndef PRODUCT
5451   ik->print();
5452   tty->print_cr("all fields:");
5453   for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5454     tty->print_cr("  name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
5455   }
5456 #endif //PRODUCT
5457   vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
5458   return -1;
5459 }
5460 
5461 void javaClasses_init() {
5462   JavaClasses::compute_offsets();
5463   JavaClasses::check_offsets();
5464   FilteredFieldsMap::initialize();  // must be done after computing offsets.
5465 }