1 /*
   2  * Copyright (c) 1997, 2023, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "precompiled.hpp"
  26 #include "cds/archiveBuilder.hpp"
  27 #include "cds/archiveHeapLoader.hpp"
  28 #include "cds/heapShared.hpp"
  29 #include "cds/metaspaceShared.hpp"
  30 #include "classfile/altHashing.hpp"
  31 #include "classfile/classLoaderData.inline.hpp"
  32 #include "classfile/javaClasses.inline.hpp"
  33 #include "classfile/javaClassesImpl.hpp"
  34 #include "classfile/javaThreadStatus.hpp"
  35 #include "classfile/moduleEntry.hpp"
  36 #include "classfile/stringTable.hpp"
  37 #include "classfile/symbolTable.hpp"
  38 #include "classfile/systemDictionary.hpp"
  39 #include "classfile/vmClasses.hpp"
  40 #include "classfile/vmSymbols.hpp"
  41 #include "code/debugInfo.hpp"
  42 #include "code/dependencyContext.hpp"
  43 #include "code/pcDesc.hpp"
  44 #include "gc/shared/collectedHeap.inline.hpp"
  45 #include "interpreter/interpreter.hpp"
  46 #include "interpreter/linkResolver.hpp"
  47 #include "jvm.h"
  48 #include "logging/log.hpp"
  49 #include "logging/logStream.hpp"
  50 #include "memory/oopFactory.hpp"
  51 #include "memory/resourceArea.hpp"
  52 #include "memory/universe.hpp"
  53 #include "oops/fieldInfo.hpp"
  54 #include "oops/fieldStreams.inline.hpp"
  55 #include "oops/instanceKlass.inline.hpp"
  56 #include "oops/instanceMirrorKlass.hpp"
  57 #include "oops/klass.hpp"
  58 #include "oops/klass.inline.hpp"
  59 #include "oops/method.inline.hpp"
  60 #include "oops/objArrayKlass.hpp"
  61 #include "oops/objArrayOop.inline.hpp"
  62 #include "oops/oopCast.inline.hpp"
  63 #include "oops/oop.inline.hpp"
  64 #include "oops/symbol.hpp"
  65 #include "oops/recordComponent.hpp"
  66 #include "oops/typeArrayOop.inline.hpp"
  67 #include "prims/jvmtiExport.hpp"
  68 #include "prims/methodHandles.hpp"
  69 #include "prims/resolvedMethodTable.hpp"
  70 #include "runtime/continuationEntry.inline.hpp"
  71 #include "runtime/continuationJavaClasses.inline.hpp"
  72 #include "runtime/fieldDescriptor.inline.hpp"
  73 #include "runtime/frame.inline.hpp"
  74 #include "runtime/handles.inline.hpp"
  75 #include "runtime/handshake.hpp"
  76 #include "runtime/init.hpp"
  77 #include "runtime/interfaceSupport.inline.hpp"
  78 #include "runtime/java.hpp"
  79 #include "runtime/javaCalls.hpp"
  80 #include "runtime/javaThread.hpp"
  81 #include "runtime/jniHandles.inline.hpp"
  82 #include "runtime/reflectionUtils.hpp"
  83 #include "runtime/safepoint.hpp"
  84 #include "runtime/safepointVerifiers.hpp"
  85 #include "runtime/threadSMR.hpp"
  86 #include "runtime/vframe.inline.hpp"
  87 #include "runtime/vm_version.hpp"
  88 #include "utilities/align.hpp"
  89 #include "utilities/growableArray.hpp"
  90 #include "utilities/preserveException.hpp"
  91 #include "utilities/utf8.hpp"
  92 #if INCLUDE_JVMCI
  93 #include "jvmci/jvmciJavaClasses.hpp"
  94 #endif
  95 
  96 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java)           \
  97   { VM_CLASS_ID(klass), VM_SYMBOL_ENUM_NAME(name##_name), VM_SYMBOL_ENUM_NAME(signature), may_be_java },
  98 
  99 InjectedField JavaClasses::_injected_fields[] = {
 100   ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
 101 };
 102 
 103 // Register native methods of Object
 104 void java_lang_Object::register_natives(TRAPS) {
 105   InstanceKlass* obj = vmClasses::Object_klass();
 106   Method::register_native(obj, vmSymbols::hashCode_name(),
 107                           vmSymbols::void_int_signature(), (address) &JVM_IHashCode, CHECK);
 108   Method::register_native(obj, vmSymbols::wait_name(),
 109                           vmSymbols::long_void_signature(), (address) &JVM_MonitorWait, CHECK);
 110   Method::register_native(obj, vmSymbols::notify_name(),
 111                           vmSymbols::void_method_signature(), (address) &JVM_MonitorNotify, CHECK);
 112   Method::register_native(obj, vmSymbols::notifyAll_name(),
 113                           vmSymbols::void_method_signature(), (address) &JVM_MonitorNotifyAll, CHECK);
 114   Method::register_native(obj, vmSymbols::clone_name(),
 115                           vmSymbols::void_object_signature(), (address) &JVM_Clone, THREAD);
 116 }
 117 
 118 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
 119   return _injected_fields[(int)id].compute_offset();
 120 }
 121 
 122 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
 123   *field_count = 0;
 124 
 125   vmSymbolID sid = vmSymbols::find_sid(class_name);
 126   if (sid == vmSymbolID::NO_SID) {
 127     // Only well known classes can inject fields
 128     return nullptr;
 129   }
 130 
 131   int count = 0;
 132   int start = -1;
 133 
 134 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
 135   if (sid == VM_SYMBOL_ENUM_NAME(klass)) {                         \
 136     count++;                                                       \
 137     if (start == -1) {                                             \
 138       start = (int)InjectedFieldID::klass##_##name##_enum;         \
 139     }                                                              \
 140   }
 141   ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
 142 #undef LOOKUP_INJECTED_FIELD
 143 
 144   if (start != -1) {
 145     *field_count = count;
 146     return _injected_fields + start;
 147   }
 148   return nullptr;
 149 }
 150 
 151 
 152 // Helpful routine for computing field offsets at run time rather than hardcoding them
 153 // Finds local fields only, including static fields.  Static field offsets are from the
 154 // beginning of the mirror.
 155 void JavaClasses::compute_offset(int &dest_offset,
 156                                  InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
 157                                  bool is_static) {
 158   fieldDescriptor fd;
 159   if (ik == nullptr) {
 160     ResourceMark rm;
 161     log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string());
 162     vm_exit_during_initialization("Invalid layout of well-known class");
 163   }
 164 
 165   if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) {
 166     ResourceMark rm;
 167     log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(),
 168                      name_symbol->as_C_string(), signature_symbol->as_C_string());
 169 #ifndef PRODUCT
 170     // Prints all fields and offsets
 171     Log(class) lt;
 172     LogStream ls(lt.error());
 173     ik->print_on(&ls);
 174 #endif //PRODUCT
 175     vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
 176   }
 177   dest_offset = fd.offset();
 178 }
 179 
 180 // Overloading to pass name as a string.
 181 void JavaClasses::compute_offset(int& dest_offset, InstanceKlass* ik,
 182                                  const char* name_string, Symbol* signature_symbol,
 183                                  bool is_static) {
 184   TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string));
 185   if (name == nullptr) {
 186     ResourceMark rm;
 187     log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string);
 188     vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name());
 189   }
 190   compute_offset(dest_offset, ik, name, signature_symbol, is_static);
 191 }
 192 
 193 // java_lang_String
 194 
 195 int java_lang_String::_value_offset;
 196 int java_lang_String::_hash_offset;
 197 int java_lang_String::_hashIsZero_offset;
 198 int java_lang_String::_coder_offset;
 199 int java_lang_String::_flags_offset;
 200 
 201 bool java_lang_String::_initialized;
 202 
 203 
 204 bool java_lang_String::test_and_set_flag(oop java_string, uint8_t flag_mask) {
 205   uint8_t* addr = flags_addr(java_string);
 206   uint8_t value = Atomic::load(addr);
 207   while ((value & flag_mask) == 0) {
 208     uint8_t old_value = value;
 209     value |= flag_mask;
 210     value = Atomic::cmpxchg(addr, old_value, value);
 211     if (value == old_value) return false; // Flag bit changed from 0 to 1.
 212   }
 213   return true;                  // Flag bit is already 1.
 214 }
 215 
 216 #define STRING_FIELDS_DO(macro) \
 217   macro(_value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \
 218   macro(_hash_offset,  k, "hash",                  int_signature,        false); \
 219   macro(_hashIsZero_offset, k, "hashIsZero",       bool_signature,       false); \
 220   macro(_coder_offset, k, "coder",                 byte_signature,       false);
 221 
 222 void java_lang_String::compute_offsets() {
 223   if (_initialized) {
 224     return;
 225   }
 226 
 227   InstanceKlass* k = vmClasses::String_klass();
 228   STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
 229   STRING_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
 230 
 231   _initialized = true;
 232 }
 233 
 234 #if INCLUDE_CDS
 235 void java_lang_String::serialize_offsets(SerializeClosure* f) {
 236   STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
 237   STRING_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
 238   f->do_bool(&_initialized);
 239 }
 240 #endif
 241 
 242 class CompactStringsFixup : public FieldClosure {
 243 private:
 244   bool _value;
 245 
 246 public:
 247   CompactStringsFixup(bool value) : _value(value) {}
 248 
 249   void do_field(fieldDescriptor* fd) {
 250     if (fd->name() == vmSymbols::compact_strings_name()) {
 251       oop mirror = fd->field_holder()->java_mirror();
 252       assert(fd->field_holder() == vmClasses::String_klass(), "Should be String");
 253       assert(mirror != nullptr, "String must have mirror already");
 254       mirror->bool_field_put(fd->offset(), _value);
 255     }
 256   }
 257 };
 258 
 259 void java_lang_String::set_compact_strings(bool value) {
 260   CompactStringsFixup fix(value);
 261   vmClasses::String_klass()->do_local_static_fields(&fix);
 262 }
 263 
 264 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
 265   assert(_initialized, "Must be initialized");
 266   assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
 267 
 268   // Create the String object first, so there's a chance that the String
 269   // and the char array it points to end up in the same cache line.
 270   oop obj;
 271   obj = vmClasses::String_klass()->allocate_instance(CHECK_NH);
 272 
 273   // Create the char array.  The String object must be handlized here
 274   // because GC can happen as a result of the allocation attempt.
 275   Handle h_obj(THREAD, obj);
 276   int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
 277   typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
 278 
 279   // Point the String at the char array
 280   obj = h_obj();
 281   set_value(obj, buffer);
 282   // No need to zero the offset, allocation zero'ed the entire String object
 283   set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
 284   return h_obj;
 285 }
 286 
 287 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) {
 288   bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
 289   Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
 290   typeArrayOop buffer = value(h_obj());
 291   assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
 292   if (is_latin1) {
 293     for (int index = 0; index < length; index++) {
 294       buffer->byte_at_put(index, (jbyte)unicode[index]);
 295     }
 296   } else {
 297     for (int index = 0; index < length; index++) {
 298       buffer->char_at_put(index, unicode[index]);
 299     }
 300   }
 301 
 302 #ifdef ASSERT
 303   {
 304     ResourceMark rm;
 305     char* expected = UNICODE::as_utf8(unicode, length);
 306     char* actual = as_utf8_string(h_obj());
 307     if (strcmp(expected, actual) != 0) {
 308       fatal("Unicode conversion failure: %s --> %s", expected, actual);
 309     }
 310   }
 311 #endif
 312 
 313   return h_obj;
 314 }
 315 
 316 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) {
 317   Handle h_obj = create_from_unicode(unicode, length, CHECK_NULL);
 318   return h_obj();
 319 }
 320 
 321 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
 322   if (utf8_str == nullptr) {
 323     return Handle();
 324   }
 325   bool has_multibyte, is_latin1;
 326   int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
 327   if (!CompactStrings) {
 328     has_multibyte = true;
 329     is_latin1 = false;
 330   }
 331 
 332   Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
 333   if (length > 0) {
 334     if (!has_multibyte) {
 335       const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
 336       ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
 337     } else if (is_latin1) {
 338       UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
 339     } else {
 340       UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
 341     }
 342   }
 343 
 344 #ifdef ASSERT
 345   // This check is too strict when the input string is not a valid UTF8.
 346   // For example, it may be created with arbitrary content via jni_NewStringUTF.
 347   if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, (int)strlen(utf8_str), false)) {
 348     ResourceMark rm;
 349     const char* expected = utf8_str;
 350     char* actual = as_utf8_string(h_obj());
 351     if (strcmp(expected, actual) != 0) {
 352       fatal("String conversion failure: %s --> %s", expected, actual);
 353     }
 354   }
 355 #endif
 356 
 357   return h_obj;
 358 }
 359 
 360 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
 361   Handle h_obj = create_from_str(utf8_str, CHECK_NULL);
 362   return h_obj();
 363 }
 364 
 365 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
 366   const char* utf8_str = (char*)symbol->bytes();
 367   int utf8_len = symbol->utf8_length();
 368 
 369   bool has_multibyte, is_latin1;
 370   int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
 371   if (!CompactStrings) {
 372     has_multibyte = true;
 373     is_latin1 = false;
 374   }
 375 
 376   Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
 377   if (length > 0) {
 378     if (!has_multibyte) {
 379       const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
 380       ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
 381     } else if (is_latin1) {
 382       UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
 383     } else {
 384       UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
 385     }
 386   }
 387 
 388 #ifdef ASSERT
 389   {
 390     ResourceMark rm;
 391     const char* expected = symbol->as_utf8();
 392     char* actual = as_utf8_string(h_obj());
 393     if (strncmp(expected, actual, utf8_len) != 0) {
 394       fatal("Symbol conversion failure: %s --> %s", expected, actual);
 395     }
 396   }
 397 #endif
 398 
 399   return h_obj;
 400 }
 401 
 402 // Converts a C string to a Java String based on current encoding
 403 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
 404   assert(str != nullptr, "bad arguments");
 405 
 406   typedef jstring (JNICALL *to_java_string_fn_t)(JNIEnv*, const char *);
 407   static to_java_string_fn_t _to_java_string_fn = nullptr;
 408 
 409   if (_to_java_string_fn == nullptr) {
 410     void *lib_handle = os::native_java_library();
 411     _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "JNU_NewStringPlatform"));
 412 #if defined(_WIN32) && !defined(_WIN64)
 413     if (_to_java_string_fn == nullptr) {
 414       // On 32 bit Windows, also try __stdcall decorated name
 415       _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "_JNU_NewStringPlatform@8"));
 416     }
 417 #endif
 418     if (_to_java_string_fn == nullptr) {
 419       fatal("JNU_NewStringPlatform missing");
 420     }
 421   }
 422 
 423   jstring js = nullptr;
 424   {
 425     JavaThread* thread = THREAD;
 426     HandleMark hm(thread);
 427     ThreadToNativeFromVM ttn(thread);
 428     js = (_to_java_string_fn)(thread->jni_environment(), str);
 429   }
 430 
 431   Handle native_platform_string(THREAD, JNIHandles::resolve(js));
 432   JNIHandles::destroy_local(js);  // destroy local JNIHandle.
 433   return native_platform_string;
 434 }
 435 
 436 // Converts a Java String to a native C string that can be used for
 437 // native OS calls.
 438 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
 439   typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
 440   static to_platform_string_fn_t _to_platform_string_fn = nullptr;
 441 
 442   if (_to_platform_string_fn == nullptr) {
 443     void *lib_handle = os::native_java_library();
 444     _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
 445     if (_to_platform_string_fn == nullptr) {
 446       fatal("GetStringPlatformChars missing");
 447     }
 448   }
 449 
 450   char *native_platform_string;
 451   jstring js;
 452   { JavaThread* thread = THREAD;
 453     js = (jstring) JNIHandles::make_local(thread, java_string());
 454     HandleMark hm(thread);
 455     ThreadToNativeFromVM ttn(thread);
 456     JNIEnv *env = thread->jni_environment();
 457     bool is_copy;
 458     native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
 459     assert(is_copy == JNI_TRUE, "is_copy value changed");
 460   }
 461 
 462   // Uses a store barrier and therefore needs to be in vm state
 463   JNIHandles::destroy_local(js);
 464 
 465   return native_platform_string;
 466 }
 467 
 468 Handle java_lang_String::externalize_classname(Symbol* java_name, TRAPS) {
 469   ResourceMark rm(THREAD);
 470   return create_from_str(java_name->as_klass_external_name(), THREAD);
 471 }
 472 
 473 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
 474   jchar* result = as_unicode_string_or_null(java_string, length);
 475   if (result == nullptr) {
 476     THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
 477   }
 478   return result;
 479 }
 480 
 481 jchar* java_lang_String::as_unicode_string_or_null(oop java_string, int& length) {
 482   typeArrayOop value  = java_lang_String::value(java_string);
 483                length = java_lang_String::length(java_string, value);
 484   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 485 
 486   jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
 487   if (result != nullptr) {
 488     if (!is_latin1) {
 489       for (int index = 0; index < length; index++) {
 490         result[index] = value->char_at(index);
 491       }
 492     } else {
 493       for (int index = 0; index < length; index++) {
 494         result[index] = ((jchar) value->byte_at(index)) & 0xff;
 495       }
 496     }
 497   }
 498   return result;
 499 }
 500 
 501 inline unsigned int java_lang_String::hash_code_impl(oop java_string, bool update) {
 502   // The hash and hashIsZero fields are subject to a benign data race,
 503   // making it crucial to ensure that any observable result of the
 504   // calculation in this method stays correct under any possible read of
 505   // these fields. Necessary restrictions to allow this to be correct
 506   // without explicit memory fences or similar concurrency primitives is
 507   // that we can ever only write to one of these two fields for a given
 508   // String instance, and that the computation is idempotent and derived
 509   // from immutable state
 510   assert(_initialized && (_hash_offset > 0) && (_hashIsZero_offset > 0), "Must be initialized");
 511   if (java_lang_String::hash_is_set(java_string)) {
 512     return java_string->int_field(_hash_offset);
 513   }
 514 
 515   typeArrayOop value = java_lang_String::value(java_string);
 516   int         length = java_lang_String::length(java_string, value);
 517   bool     is_latin1 = java_lang_String::is_latin1(java_string);
 518 
 519   unsigned int hash = 0;
 520   if (length > 0) {
 521     if (is_latin1) {
 522       hash = java_lang_String::hash_code(value->byte_at_addr(0), length);
 523     } else {
 524       hash = java_lang_String::hash_code(value->char_at_addr(0), length);
 525     }
 526   }
 527 
 528   if (update) {
 529     if (hash != 0) {
 530       java_string->int_field_put(_hash_offset, hash);
 531     } else {
 532       java_string->bool_field_put(_hashIsZero_offset, true);
 533     }
 534   }
 535   return hash;
 536 }
 537 
 538 unsigned int java_lang_String::hash_code(oop java_string) {
 539   return hash_code_impl(java_string, /*update=*/true);
 540 }
 541 
 542 unsigned int java_lang_String::hash_code_noupdate(oop java_string) {
 543   return hash_code_impl(java_string, /*update=*/false);
 544 }
 545 
 546 
 547 char* java_lang_String::as_quoted_ascii(oop java_string) {
 548   typeArrayOop value  = java_lang_String::value(java_string);
 549   int          length = java_lang_String::length(java_string, value);
 550   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 551 
 552   if (length == 0) return nullptr;
 553 
 554   char* result;
 555   int result_length;
 556   if (!is_latin1) {
 557     jchar* base = value->char_at_addr(0);
 558     result_length = UNICODE::quoted_ascii_length(base, length) + 1;
 559     result = NEW_RESOURCE_ARRAY(char, result_length);
 560     UNICODE::as_quoted_ascii(base, length, result, result_length);
 561   } else {
 562     jbyte* base = value->byte_at_addr(0);
 563     result_length = UNICODE::quoted_ascii_length(base, length) + 1;
 564     result = NEW_RESOURCE_ARRAY(char, result_length);
 565     UNICODE::as_quoted_ascii(base, length, result, result_length);
 566   }
 567   assert(result_length >= length + 1, "must not be shorter");
 568   assert(result_length == (int)strlen(result) + 1, "must match");
 569   return result;
 570 }
 571 
 572 Symbol* java_lang_String::as_symbol(oop java_string) {
 573   typeArrayOop value  = java_lang_String::value(java_string);
 574   int          length = java_lang_String::length(java_string, value);
 575   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 576   if (!is_latin1) {
 577     jchar* base = (length == 0) ? nullptr : value->char_at_addr(0);
 578     Symbol* sym = SymbolTable::new_symbol(base, length);
 579     return sym;
 580   } else {
 581     ResourceMark rm;
 582     jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
 583     const char* base = UNICODE::as_utf8(position, length);
 584     Symbol* sym = SymbolTable::new_symbol(base, length);
 585     return sym;
 586   }
 587 }
 588 
 589 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
 590   typeArrayOop value  = java_lang_String::value(java_string);
 591   int          length = java_lang_String::length(java_string, value);
 592   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 593   if (!is_latin1) {
 594     jchar* base = (length == 0) ? nullptr : value->char_at_addr(0);
 595     return SymbolTable::probe_unicode(base, length);
 596   } else {
 597     ResourceMark rm;
 598     jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
 599     const char* base = UNICODE::as_utf8(position, length);
 600     return SymbolTable::probe(base, length);
 601   }
 602 }
 603 
 604 int java_lang_String::utf8_length(oop java_string, typeArrayOop value) {
 605   assert(value_equals(value, java_lang_String::value(java_string)),
 606          "value must be same as java_lang_String::value(java_string)");
 607   int length = java_lang_String::length(java_string, value);
 608   if (length == 0) {
 609     return 0;
 610   }
 611   if (!java_lang_String::is_latin1(java_string)) {
 612     return UNICODE::utf8_length(value->char_at_addr(0), length);
 613   } else {
 614     return UNICODE::utf8_length(value->byte_at_addr(0), length);
 615   }
 616 }
 617 
 618 int java_lang_String::utf8_length(oop java_string) {
 619   typeArrayOop value = java_lang_String::value(java_string);
 620   return utf8_length(java_string, value);
 621 }
 622 
 623 char* java_lang_String::as_utf8_string(oop java_string) {
 624   int length;
 625   return as_utf8_string(java_string, length);
 626 }
 627 
 628 char* java_lang_String::as_utf8_string(oop java_string, int& length) {
 629   typeArrayOop value = java_lang_String::value(java_string);
 630   length             = java_lang_String::length(java_string, value);
 631   bool     is_latin1 = java_lang_String::is_latin1(java_string);
 632   if (!is_latin1) {
 633     jchar* position = (length == 0) ? nullptr : value->char_at_addr(0);
 634     return UNICODE::as_utf8(position, length);
 635   } else {
 636     jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
 637     return UNICODE::as_utf8(position, length);
 638   }
 639 }
 640 
 641 // Uses a provided buffer if it's sufficiently large, otherwise allocates
 642 // a resource array to fit
 643 char* java_lang_String::as_utf8_string_full(oop java_string, char* buf, int buflen, int& utf8_len) {
 644   typeArrayOop value = java_lang_String::value(java_string);
 645   int            len = java_lang_String::length(java_string, value);
 646   bool     is_latin1 = java_lang_String::is_latin1(java_string);
 647   if (!is_latin1) {
 648     jchar *position = (len == 0) ? nullptr : value->char_at_addr(0);
 649     utf8_len = UNICODE::utf8_length(position, len);
 650     if (utf8_len >= buflen) {
 651       buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
 652     }
 653     return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
 654   } else {
 655     jbyte *position = (len == 0) ? nullptr : value->byte_at_addr(0);
 656     utf8_len = UNICODE::utf8_length(position, len);
 657     if (utf8_len >= buflen) {
 658       buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
 659     }
 660     return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
 661   }
 662 }
 663 
 664 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, int buflen) {
 665   assert(value_equals(value, java_lang_String::value(java_string)),
 666          "value must be same as java_lang_String::value(java_string)");
 667   int     length = java_lang_String::length(java_string, value);
 668   bool is_latin1 = java_lang_String::is_latin1(java_string);
 669   if (!is_latin1) {
 670     jchar* position = (length == 0) ? nullptr : value->char_at_addr(0);
 671     return UNICODE::as_utf8(position, length, buf, buflen);
 672   } else {
 673     jbyte* position = (length == 0) ? nullptr : value->byte_at_addr(0);
 674     return UNICODE::as_utf8(position, length, buf, buflen);
 675   }
 676 }
 677 
 678 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
 679   typeArrayOop value = java_lang_String::value(java_string);
 680   return as_utf8_string(java_string, value, buf, buflen);
 681 }
 682 
 683 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
 684   typeArrayOop value  = java_lang_String::value(java_string);
 685   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 686   assert(start + len <= java_lang_String::length(java_string), "just checking");
 687   if (!is_latin1) {
 688     jchar* position = value->char_at_addr(start);
 689     return UNICODE::as_utf8(position, len);
 690   } else {
 691     jbyte* position = value->byte_at_addr(start);
 692     return UNICODE::as_utf8(position, len);
 693   }
 694 }
 695 
 696 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, int buflen) {
 697   assert(value_equals(value, java_lang_String::value(java_string)),
 698          "value must be same as java_lang_String::value(java_string)");
 699   assert(start + len <= java_lang_String::length(java_string), "just checking");
 700   bool is_latin1 = java_lang_String::is_latin1(java_string);
 701   if (!is_latin1) {
 702     jchar* position = value->char_at_addr(start);
 703     return UNICODE::as_utf8(position, len, buf, buflen);
 704   } else {
 705     jbyte* position = value->byte_at_addr(start);
 706     return UNICODE::as_utf8(position, len, buf, buflen);
 707   }
 708 }
 709 
 710 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) {
 711   assert(java_string->klass() == vmClasses::String_klass(),
 712          "must be java_string");
 713   typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
 714   int length = java_lang_String::length(java_string, value);
 715   if (length != len) {
 716     return false;
 717   }
 718   bool is_latin1 = java_lang_String::is_latin1(java_string);
 719   if (!is_latin1) {
 720     for (int i = 0; i < len; i++) {
 721       if (value->char_at(i) != chars[i]) {
 722         return false;
 723       }
 724     }
 725   } else {
 726     for (int i = 0; i < len; i++) {
 727       if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
 728         return false;
 729       }
 730     }
 731   }
 732   return true;
 733 }
 734 
 735 bool java_lang_String::equals(oop str1, oop str2) {
 736   assert(str1->klass() == vmClasses::String_klass(),
 737          "must be java String");
 738   assert(str2->klass() == vmClasses::String_klass(),
 739          "must be java String");
 740   typeArrayOop value1    = java_lang_String::value_no_keepalive(str1);
 741   bool         is_latin1 = java_lang_String::is_latin1(str1);
 742   typeArrayOop value2    = java_lang_String::value_no_keepalive(str2);
 743   bool         is_latin2 = java_lang_String::is_latin1(str2);
 744 
 745   if (is_latin1 != is_latin2) {
 746     // Strings with different coders are never equal.
 747     return false;
 748   }
 749   return value_equals(value1, value2);
 750 }
 751 
 752 void java_lang_String::print(oop java_string, outputStream* st) {
 753   assert(java_string->klass() == vmClasses::String_klass(), "must be java_string");
 754   typeArrayOop value  = java_lang_String::value_no_keepalive(java_string);
 755 
 756   if (value == nullptr) {
 757     // This can happen if, e.g., printing a String
 758     // object before its initializer has been called
 759     st->print("nullptr");
 760     return;
 761   }
 762 
 763   int length = java_lang_String::length(java_string, value);
 764   bool is_latin1 = java_lang_String::is_latin1(java_string);
 765 
 766   st->print("\"");
 767   for (int index = 0; index < length; index++) {
 768     st->print("%c", (!is_latin1) ?  value->char_at(index) :
 769                            ((jchar) value->byte_at(index)) & 0xff );
 770   }
 771   st->print("\"");
 772 }
 773 
 774 // java_lang_Class
 775 
 776 int java_lang_Class::_klass_offset;
 777 int java_lang_Class::_array_klass_offset;
 778 int java_lang_Class::_oop_size_offset;
 779 int java_lang_Class::_static_oop_field_count_offset;
 780 int java_lang_Class::_class_loader_offset;
 781 int java_lang_Class::_module_offset;
 782 int java_lang_Class::_protection_domain_offset;
 783 int java_lang_Class::_component_mirror_offset;
 784 int java_lang_Class::_signers_offset;
 785 int java_lang_Class::_name_offset;
 786 int java_lang_Class::_source_file_offset;
 787 int java_lang_Class::_classData_offset;
 788 int java_lang_Class::_classRedefinedCount_offset;
 789 
 790 bool java_lang_Class::_offsets_computed = false;
 791 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = nullptr;
 792 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = nullptr;
 793 
 794 #ifdef ASSERT
 795 inline static void assert_valid_static_string_field(fieldDescriptor* fd) {
 796   assert(fd->has_initial_value(), "caller should have checked this");
 797   assert(fd->field_type() == T_OBJECT, "caller should have checked this");
 798   // Can't use vmSymbols::string_signature() as fd->signature() may have been relocated
 799   // during DumpSharedSpaces
 800   assert(fd->signature()->equals("Ljava/lang/String;"), "just checking");
 801 }
 802 #endif
 803 
 804 static void initialize_static_string_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
 805   DEBUG_ONLY(assert_valid_static_string_field(fd);)
 806   oop string = fd->string_initial_value(CHECK);
 807   mirror()->obj_field_put(fd->offset(), string);
 808 }
 809 
 810 static void initialize_static_primitive_field(fieldDescriptor* fd, Handle mirror) {
 811   assert(fd->has_initial_value(), "caller should have checked this");
 812   BasicType t = fd->field_type();
 813   switch (t) {
 814   case T_BYTE:
 815     mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
 816     break;
 817   case T_BOOLEAN:
 818     mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
 819     break;
 820   case T_CHAR:
 821     mirror()->char_field_put(fd->offset(), fd->int_initial_value());
 822     break;
 823   case T_SHORT:
 824     mirror()->short_field_put(fd->offset(), fd->int_initial_value());
 825     break;
 826   case T_INT:
 827     mirror()->int_field_put(fd->offset(), fd->int_initial_value());
 828     break;
 829   case T_FLOAT:
 830     mirror()->float_field_put(fd->offset(), fd->float_initial_value());
 831     break;
 832   case T_DOUBLE:
 833     mirror()->double_field_put(fd->offset(), fd->double_initial_value());
 834     break;
 835   case T_LONG:
 836     mirror()->long_field_put(fd->offset(), fd->long_initial_value());
 837     break;
 838   default:
 839     // Illegal ConstantValue attribute in class file should have been
 840     // caught during classfile parsing.
 841     ShouldNotReachHere();
 842   }
 843 }
 844 
 845 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
 846   assert(mirror.not_null() && fd->is_static(), "just checking");
 847   if (fd->has_initial_value()) {
 848     if (fd->field_type() != T_OBJECT) {
 849       initialize_static_primitive_field(fd, mirror);
 850     } else {
 851       initialize_static_string_field(fd, mirror, CHECK);
 852     }
 853   }
 854 }
 855 
 856 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
 857   assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
 858 
 859   // If the offset was read from the shared archive, it was fixed up already
 860   if (!k->is_shared()) {
 861     if (k->is_instance_klass()) {
 862       // During bootstrap, java.lang.Class wasn't loaded so static field
 863       // offsets were computed without the size added it.  Go back and
 864       // update all the static field offsets to included the size.
 865 
 866       // Unfortunately, the FieldInfo stream is encoded with UNSIGNED5 which doesn't allow
 867       // content updates. So the FieldInfo stream has to be decompressed into a temporary array,
 868       // static fields offsets are updated in this array before reencoding everything into
 869       // a new UNSIGNED5 stream, and substitute it to the old FieldInfo stream.
 870 
 871       int java_fields;
 872       int injected_fields;
 873       InstanceKlass* ik = InstanceKlass::cast(k);
 874       GrowableArray<FieldInfo>* fields =
 875         FieldInfoStream::create_FieldInfoArray(ik->fieldinfo_stream(),
 876                                                &java_fields, &injected_fields);
 877       for (int i = 0; i < fields->length(); i++) {
 878         FieldInfo* fi = fields->adr_at(i);
 879         if (fi->access_flags().is_static()) {
 880           fi->set_offset(fi->offset() + InstanceMirrorKlass::offset_of_static_fields());
 881         }
 882       }
 883       Array<u1>* old_stream = ik->fieldinfo_stream();
 884       assert(fields->length() == (java_fields + injected_fields), "Must be");
 885       Array<u1>* new_fis = FieldInfoStream::create_FieldInfoStream(fields, java_fields, injected_fields, k->class_loader_data(), CHECK);
 886       ik->set_fieldinfo_stream(new_fis);
 887       MetadataFactory::free_array<u1>(k->class_loader_data(), old_stream);
 888     }
 889   }
 890 
 891   if (k->is_shared() && k->has_archived_mirror_index()) {
 892     if (ArchiveHeapLoader::are_archived_mirrors_available()) {
 893       bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK);
 894       assert(present, "Missing archived mirror for %s", k->external_name());
 895       return;
 896     } else {
 897       k->clear_java_mirror_handle();
 898       k->clear_archived_mirror_index();
 899     }
 900   }
 901   create_mirror(k, Handle(), Handle(), Handle(), Handle(), CHECK);
 902 }
 903 
 904 void java_lang_Class::initialize_mirror_fields(Klass* k,
 905                                                Handle mirror,
 906                                                Handle protection_domain,
 907                                                Handle classData,
 908                                                TRAPS) {
 909   // Set protection domain also
 910   set_protection_domain(mirror(), protection_domain());
 911 
 912   // Initialize static fields
 913   InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK);
 914 
 915  // Set classData
 916   set_class_data(mirror(), classData());
 917 }
 918 
 919 // Set the java.lang.Module module field in the java_lang_Class mirror
 920 void java_lang_Class::set_mirror_module_field(JavaThread* current, Klass* k, Handle mirror, Handle module) {
 921   if (module.is_null()) {
 922     // During startup, the module may be null only if java.base has not been defined yet.
 923     // Put the class on the fixup_module_list to patch later when the java.lang.Module
 924     // for java.base is known. But note that since we captured the null module another
 925     // thread may have completed that initialization.
 926 
 927     bool javabase_was_defined = false;
 928     {
 929       MutexLocker m1(current, Module_lock);
 930       // Keep list of classes needing java.base module fixup
 931       if (!ModuleEntryTable::javabase_defined()) {
 932         assert(k->java_mirror() != nullptr, "Class's mirror is null");
 933         k->class_loader_data()->inc_keep_alive();
 934         assert(fixup_module_field_list() != nullptr, "fixup_module_field_list not initialized");
 935         fixup_module_field_list()->push(k);
 936       } else {
 937         javabase_was_defined = true;
 938       }
 939     }
 940 
 941     // If java.base was already defined then patch this particular class with java.base.
 942     if (javabase_was_defined) {
 943       ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
 944       assert(javabase_entry != nullptr && javabase_entry->module() != nullptr,
 945              "Setting class module field, " JAVA_BASE_NAME " should be defined");
 946       Handle javabase_handle(current, javabase_entry->module());
 947       set_module(mirror(), javabase_handle());
 948     }
 949   } else {
 950     assert(Universe::is_module_initialized() ||
 951            (ModuleEntryTable::javabase_defined() &&
 952             (module() == ModuleEntryTable::javabase_moduleEntry()->module())),
 953            "Incorrect java.lang.Module specification while creating mirror");
 954     set_module(mirror(), module());
 955   }
 956 }
 957 
 958 // Statically allocate fixup lists because they always get created.
 959 void java_lang_Class::allocate_fixup_lists() {
 960   GrowableArray<Klass*>* mirror_list =
 961     new (mtClass) GrowableArray<Klass*>(40, mtClass);
 962   set_fixup_mirror_list(mirror_list);
 963 
 964   GrowableArray<Klass*>* module_list =
 965     new (mtModule) GrowableArray<Klass*>(500, mtModule);
 966   set_fixup_module_field_list(module_list);
 967 }
 968 
 969 void java_lang_Class::allocate_mirror(Klass* k, bool is_scratch, Handle protection_domain, Handle classData,
 970                                       Handle& mirror, Handle& comp_mirror, TRAPS) {
 971   // Allocate mirror (java.lang.Class instance)
 972   oop mirror_oop = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(k, CHECK);
 973   mirror = Handle(THREAD, mirror_oop);
 974 
 975   // Setup indirection from mirror->klass
 976   set_klass(mirror(), k);
 977 
 978   InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
 979   assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
 980 
 981   set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
 982 
 983   // It might also have a component mirror.  This mirror must already exist.
 984   if (k->is_array_klass()) {
 985     if (k->is_typeArray_klass()) {
 986       BasicType type = TypeArrayKlass::cast(k)->element_type();
 987       if (is_scratch) {
 988         comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(type));
 989       } else {
 990         comp_mirror = Handle(THREAD, Universe::java_mirror(type));
 991       }
 992     } else {
 993       assert(k->is_objArray_klass(), "Must be");
 994       Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
 995       assert(element_klass != nullptr, "Must have an element klass");
 996       if (is_scratch) {
 997         comp_mirror = Handle(THREAD, HeapShared::scratch_java_mirror(element_klass));
 998       } else {
 999         comp_mirror = Handle(THREAD, element_klass->java_mirror());
1000       }
1001     }
1002     assert(comp_mirror() != nullptr, "must have a mirror");
1003 
1004     // Two-way link between the array klass and its component mirror:
1005     // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
1006     set_component_mirror(mirror(), comp_mirror());
1007     // See below for ordering dependencies between field array_klass in component mirror
1008     // and java_mirror in this klass.
1009   } else {
1010     assert(k->is_instance_klass(), "Must be");
1011 
1012     initialize_mirror_fields(k, mirror, protection_domain, classData, THREAD);
1013     if (HAS_PENDING_EXCEPTION) {
1014       // If any of the fields throws an exception like OOM remove the klass field
1015       // from the mirror so GC doesn't follow it after the klass has been deallocated.
1016       // This mirror looks like a primitive type, which logically it is because it
1017       // it represents no class.
1018       set_klass(mirror(), nullptr);
1019       return;
1020     }
1021   }
1022 }
1023 
1024 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
1025                                     Handle module, Handle protection_domain,
1026                                     Handle classData, TRAPS) {
1027   assert(k != nullptr, "Use create_basic_type_mirror for primitive types");
1028   assert(k->java_mirror() == nullptr, "should only assign mirror once");
1029 
1030   // Use this moment of initialization to cache modifier_flags also,
1031   // to support Class.getModifiers().  Instance classes recalculate
1032   // the cached flags after the class file is parsed, but before the
1033   // class is put into the system dictionary.
1034   int computed_modifiers = k->compute_modifier_flags();
1035   k->set_modifier_flags(computed_modifiers);
1036   // Class_klass has to be loaded because it is used to allocate
1037   // the mirror.
1038   if (vmClasses::Class_klass_loaded()) {
1039     Handle mirror;
1040     Handle comp_mirror;
1041 
1042     allocate_mirror(k, /*is_scratch=*/false, protection_domain, classData, mirror, comp_mirror, CHECK);
1043 
1044     // set the classLoader field in the java_lang_Class instance
1045     assert(class_loader() == k->class_loader(), "should be same");
1046     set_class_loader(mirror(), class_loader());
1047 
1048     // Setup indirection from klass->mirror
1049     // after any exceptions can happen during allocations.
1050     k->set_java_mirror(mirror);
1051 
1052     // Set the module field in the java_lang_Class instance.  This must be done
1053     // after the mirror is set.
1054     set_mirror_module_field(THREAD, k, mirror, module);
1055 
1056     if (comp_mirror() != nullptr) {
1057       // Set after k->java_mirror() is published, because compiled code running
1058       // concurrently doesn't expect a k to have a null java_mirror.
1059       release_set_array_klass(comp_mirror(), k);
1060     }
1061     if (DumpSharedSpaces) {
1062       create_scratch_mirror(k, CHECK);
1063     }
1064   } else {
1065     assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1066     fixup_mirror_list()->push(k);
1067   }
1068 }
1069 
1070 #if INCLUDE_CDS_JAVA_HEAP
1071 // The "scratch mirror" stores the states of the mirror object that can be
1072 // decided at dump time (such as the initial values of the static fields, the
1073 // component mirror, etc). At runtime, more information is added to it by
1074 // java_lang_Class::restore_archived_mirror().
1075 //
1076 // Essentially, /*dumptime*/create_scratch_mirror() + /*runtime*/restore_archived_mirror()
1077 // produces the same result as /*runtime*/create_mirror().
1078 //
1079 // Note: we archive the "scratch mirror" instead of k->java_mirror(), because the
1080 // latter may contain dumptime-specific information that cannot be archived
1081 // (e.g., ClassLoaderData*, or static fields that are modified by Java code execution).
1082 void java_lang_Class::create_scratch_mirror(Klass* k, TRAPS) {
1083   if (k->class_loader() != nullptr &&
1084       k->class_loader() != SystemDictionary::java_platform_loader() &&
1085       k->class_loader() != SystemDictionary::java_system_loader()) {
1086     // We only archive the mirrors of classes loaded by the built-in loaders
1087     return;
1088   }
1089 
1090   Handle protection_domain, classData; // set to null. Will be reinitialized at runtime
1091   Handle mirror;
1092   Handle comp_mirror;
1093   allocate_mirror(k, /*is_scratch=*/true, protection_domain, classData, mirror, comp_mirror, CHECK);
1094 
1095   if (comp_mirror() != nullptr) {
1096     release_set_array_klass(comp_mirror(), k);
1097   }
1098 
1099   HeapShared::set_scratch_java_mirror(k, mirror());
1100 }
1101 
1102 // Returns true if the mirror is updated, false if no archived mirror
1103 // data is present. After the archived mirror object is restored, the
1104 // shared klass' _has_raw_archived_mirror flag is cleared.
1105 bool java_lang_Class::restore_archived_mirror(Klass *k,
1106                                               Handle class_loader, Handle module,
1107                                               Handle protection_domain, TRAPS) {
1108   // Postpone restoring archived mirror until java.lang.Class is loaded. Please
1109   // see more details in vmClasses::resolve_all().
1110   if (!vmClasses::Class_klass_loaded()) {
1111     assert(fixup_mirror_list() != nullptr, "fixup_mirror_list not initialized");
1112     fixup_mirror_list()->push(k);
1113     return true;
1114   }
1115 
1116   oop m = k->archived_java_mirror();
1117   assert(m != nullptr, "must have stored non-null archived mirror");
1118 
1119   // Sanity: clear it now to prevent re-initialization if any of the following fails
1120   k->clear_archived_mirror_index();
1121 
1122   // mirror is archived, restore
1123   log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1124   if (ArchiveHeapLoader::is_mapped()) {
1125     assert(Universe::heap()->is_archived_object(m), "must be archived mirror object");
1126   }
1127   assert(as_Klass(m) == k, "must be");
1128   Handle mirror(THREAD, m);
1129 
1130   if (!k->is_array_klass()) {
1131     // - local static final fields with initial values were initialized at dump time
1132 
1133     if (protection_domain.not_null()) {
1134       set_protection_domain(mirror(), protection_domain());
1135     }
1136   }
1137 
1138   assert(class_loader() == k->class_loader(), "should be same");
1139   if (class_loader.not_null()) {
1140     set_class_loader(mirror(), class_loader());
1141   }
1142 
1143   k->set_java_mirror(mirror);
1144 
1145   set_mirror_module_field(THREAD, k, mirror, module);
1146 
1147   if (log_is_enabled(Trace, cds, heap, mirror)) {
1148     ResourceMark rm(THREAD);
1149     log_trace(cds, heap, mirror)(
1150         "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1151   }
1152 
1153   return true;
1154 }
1155 #endif // INCLUDE_CDS_JAVA_HEAP
1156 
1157 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1158   assert(_module_offset != 0, "must have been computed already");
1159   set_module(k->java_mirror(), module());
1160 }
1161 
1162 void java_lang_Class::set_oop_size(HeapWord* java_class, size_t size) {
1163   assert(_oop_size_offset != 0, "must be set");
1164   assert(size > 0, "Oop size must be greater than zero, not " SIZE_FORMAT, size);
1165   assert(size <= INT_MAX, "Lossy conversion: " SIZE_FORMAT, size);
1166   *(int*)(((char*)java_class) + _oop_size_offset) = (int)size;
1167 }
1168 
1169 int  java_lang_Class::static_oop_field_count(oop java_class) {
1170   assert(_static_oop_field_count_offset != 0, "must be set");
1171   return java_class->int_field(_static_oop_field_count_offset);
1172 }
1173 
1174 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1175   assert(_static_oop_field_count_offset != 0, "must be set");
1176   java_class->int_field_put(_static_oop_field_count_offset, size);
1177 }
1178 
1179 oop java_lang_Class::protection_domain(oop java_class) {
1180   assert(_protection_domain_offset != 0, "must be set");
1181   return java_class->obj_field(_protection_domain_offset);
1182 }
1183 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1184   assert(_protection_domain_offset != 0, "must be set");
1185   java_class->obj_field_put(_protection_domain_offset, pd);
1186 }
1187 
1188 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1189   assert(_component_mirror_offset != 0, "must be set");
1190     java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1191   }
1192 oop java_lang_Class::component_mirror(oop java_class) {
1193   assert(_component_mirror_offset != 0, "must be set");
1194   return java_class->obj_field(_component_mirror_offset);
1195 }
1196 
1197 objArrayOop java_lang_Class::signers(oop java_class) {
1198   assert(_signers_offset != 0, "must be set");
1199   return (objArrayOop)java_class->obj_field(_signers_offset);
1200 }
1201 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
1202   assert(_signers_offset != 0, "must be set");
1203   java_class->obj_field_put(_signers_offset, signers);
1204 }
1205 
1206 oop java_lang_Class::class_data(oop java_class) {
1207   assert(_classData_offset != 0, "must be set");
1208   return java_class->obj_field(_classData_offset);
1209 }
1210 void java_lang_Class::set_class_data(oop java_class, oop class_data) {
1211   assert(_classData_offset != 0, "must be set");
1212   java_class->obj_field_put(_classData_offset, class_data);
1213 }
1214 
1215 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1216   assert(_class_loader_offset != 0, "offsets should have been initialized");
1217   java_class->obj_field_put(_class_loader_offset, loader);
1218 }
1219 
1220 oop java_lang_Class::class_loader(oop java_class) {
1221   assert(_class_loader_offset != 0, "must be set");
1222   return java_class->obj_field(_class_loader_offset);
1223 }
1224 
1225 oop java_lang_Class::module(oop java_class) {
1226   assert(_module_offset != 0, "must be set");
1227   return java_class->obj_field(_module_offset);
1228 }
1229 
1230 void java_lang_Class::set_module(oop java_class, oop module) {
1231   assert(_module_offset != 0, "must be set");
1232   java_class->obj_field_put(_module_offset, module);
1233 }
1234 
1235 oop java_lang_Class::name(Handle java_class, TRAPS) {
1236   assert(_name_offset != 0, "must be set");
1237   oop o = java_class->obj_field(_name_offset);
1238   if (o == nullptr) {
1239     o = StringTable::intern(as_external_name(java_class()), THREAD);
1240     java_class->obj_field_put(_name_offset, o);
1241   }
1242   return o;
1243 }
1244 
1245 oop java_lang_Class::source_file(oop java_class) {
1246   assert(_source_file_offset != 0, "must be set");
1247   return java_class->obj_field(_source_file_offset);
1248 }
1249 
1250 void java_lang_Class::set_source_file(oop java_class, oop source_file) {
1251   assert(_source_file_offset != 0, "must be set");
1252   java_class->obj_field_put(_source_file_offset, source_file);
1253 }
1254 
1255 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1256   // This should be improved by adding a field at the Java level or by
1257   // introducing a new VM klass (see comment in ClassFileParser)
1258   oop java_class = InstanceMirrorKlass::cast(vmClasses::Class_klass())->allocate_instance(nullptr, CHECK_NULL);
1259   if (type != T_VOID) {
1260     Klass* aklass = Universe::typeArrayKlassObj(type);
1261     assert(aklass != nullptr, "correct bootstrap");
1262     release_set_array_klass(java_class, aklass);
1263   }
1264 #ifdef ASSERT
1265   InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(vmClasses::Class_klass());
1266   assert(static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1267 #endif
1268   return java_class;
1269 }
1270 
1271 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1272   assert(is_instance(java_class), "must be a Class object");
1273   java_class->metadata_field_put(_klass_offset, klass);
1274 }
1275 
1276 
1277 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1278   assert(is_instance(java_class), "must be a Class object");
1279   Symbol* name = nullptr;
1280   bool is_instance = false;
1281   if (is_primitive(java_class)) {
1282     name = vmSymbols::type_signature(primitive_type(java_class));
1283   } else {
1284     Klass* k = as_Klass(java_class);
1285     is_instance = k->is_instance_klass();
1286     name = k->name();
1287   }
1288   if (name == nullptr) {
1289     st->print("<null>");
1290     return;
1291   }
1292   if (is_instance)  st->print("L");
1293   st->write((char*) name->base(), (int) name->utf8_length());
1294   if (is_instance)  st->print(";");
1295 }
1296 
1297 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) {
1298   assert(is_instance(java_class), "must be a Class object");
1299   Symbol* name;
1300   if (is_primitive(java_class)) {
1301     name = vmSymbols::type_signature(primitive_type(java_class));
1302     // Because this can create a new symbol, the caller has to decrement
1303     // the refcount, so make adjustment here and below for symbols returned
1304     // that are not created or incremented due to a successful lookup.
1305     name->increment_refcount();
1306   } else {
1307     Klass* k = as_Klass(java_class);
1308     if (!k->is_instance_klass()) {
1309       name = k->name();
1310       name->increment_refcount();
1311     } else {
1312       ResourceMark rm;
1313       const char* sigstr = k->signature_name();
1314       int         siglen = (int) strlen(sigstr);
1315       if (!intern_if_not_found) {
1316         name = SymbolTable::probe(sigstr, siglen);
1317       } else {
1318         name = SymbolTable::new_symbol(sigstr, siglen);
1319       }
1320     }
1321   }
1322   return name;
1323 }
1324 
1325 // Returns the Java name for this Java mirror (Resource allocated)
1326 // See Klass::external_name().
1327 // For primitive type Java mirrors, its type name is returned.
1328 const char* java_lang_Class::as_external_name(oop java_class) {
1329   assert(is_instance(java_class), "must be a Class object");
1330   const char* name = nullptr;
1331   if (is_primitive(java_class)) {
1332     name = type2name(primitive_type(java_class));
1333   } else {
1334     name = as_Klass(java_class)->external_name();
1335   }
1336   if (name == nullptr) {
1337     name = "<null>";
1338   }
1339   return name;
1340 }
1341 
1342 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1343   Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1344   assert(k == nullptr || k->is_klass() && k->is_array_klass(), "should be array klass");
1345   return k;
1346 }
1347 
1348 
1349 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1350   assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1351   java_class->release_metadata_field_put(_array_klass_offset, klass);
1352 }
1353 
1354 
1355 BasicType java_lang_Class::primitive_type(oop java_class) {
1356   assert(is_primitive(java_class), "just checking");
1357   Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1358   BasicType type = T_VOID;
1359   if (ak != nullptr) {
1360     // Note: create_basic_type_mirror above initializes ak to a non-null value.
1361     type = ArrayKlass::cast(ak)->element_type();
1362   } else {
1363     assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
1364   }
1365   assert(Universe::java_mirror(type) == java_class, "must be consistent");
1366   return type;
1367 }
1368 
1369 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1370   assert(is_instance(java_class), "must be a Class object");
1371   if (is_primitive(java_class)) {
1372     if (reference_klass != nullptr)
1373       (*reference_klass) = nullptr;
1374     return primitive_type(java_class);
1375   } else {
1376     if (reference_klass != nullptr)
1377       (*reference_klass) = as_Klass(java_class);
1378     return T_OBJECT;
1379   }
1380 }
1381 
1382 
1383 oop java_lang_Class::primitive_mirror(BasicType t) {
1384   oop mirror = Universe::java_mirror(t);
1385   assert(mirror != nullptr && mirror->is_a(vmClasses::Class_klass()), "must be a Class");
1386   assert(is_primitive(mirror), "must be primitive");
1387   return mirror;
1388 }
1389 
1390 #define CLASS_FIELDS_DO(macro) \
1391   macro(_classRedefinedCount_offset, k, "classRedefinedCount", int_signature,         false); \
1392   macro(_class_loader_offset,        k, "classLoader",         classloader_signature, false); \
1393   macro(_component_mirror_offset,    k, "componentType",       class_signature,       false); \
1394   macro(_module_offset,              k, "module",              module_signature,      false); \
1395   macro(_name_offset,                k, "name",                string_signature,      false); \
1396   macro(_classData_offset,           k, "classData",           object_signature,      false);
1397 
1398 void java_lang_Class::compute_offsets() {
1399   if (_offsets_computed) {
1400     return;
1401   }
1402 
1403   _offsets_computed = true;
1404 
1405   InstanceKlass* k = vmClasses::Class_klass();
1406   CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1407 
1408   CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1409 }
1410 
1411 #if INCLUDE_CDS
1412 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1413   f->do_bool(&_offsets_computed);
1414 
1415   CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1416 
1417   CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1418 }
1419 #endif
1420 
1421 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1422   assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1423   return the_class_mirror->int_field(_classRedefinedCount_offset);
1424 }
1425 
1426 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1427   assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1428   the_class_mirror->int_field_put(_classRedefinedCount_offset, value);
1429 }
1430 
1431 
1432 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1433 //       platform thread structure, and a eetop offset which was used for thread
1434 //       local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1435 //       merged, so in the HotSpot VM we just use the eetop field for the thread
1436 //       instead of the privateInfo_offset.
1437 //
1438 // Note: The stackSize field is only present starting in 1.4.
1439 
1440 int java_lang_Thread_FieldHolder::_group_offset;
1441 int java_lang_Thread_FieldHolder::_priority_offset;
1442 int java_lang_Thread_FieldHolder::_stackSize_offset;
1443 int java_lang_Thread_FieldHolder::_daemon_offset;
1444 int java_lang_Thread_FieldHolder::_thread_status_offset;
1445 
1446 #define THREAD_FIELD_HOLDER_FIELDS_DO(macro) \
1447   macro(_group_offset,         k, vmSymbols::group_name(),    threadgroup_signature, false); \
1448   macro(_priority_offset,      k, vmSymbols::priority_name(), int_signature,         false); \
1449   macro(_stackSize_offset,     k, "stackSize",                long_signature,        false); \
1450   macro(_daemon_offset,        k, vmSymbols::daemon_name(),   bool_signature,        false); \
1451   macro(_thread_status_offset, k, "threadStatus",             int_signature,         false)
1452 
1453 void java_lang_Thread_FieldHolder::compute_offsets() {
1454   assert(_group_offset == 0, "offsets should be initialized only once");
1455 
1456   InstanceKlass* k = vmClasses::Thread_FieldHolder_klass();
1457   THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1458 }
1459 
1460 #if INCLUDE_CDS
1461 void java_lang_Thread_FieldHolder::serialize_offsets(SerializeClosure* f) {
1462   THREAD_FIELD_HOLDER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1463 }
1464 #endif
1465 
1466 oop java_lang_Thread_FieldHolder::threadGroup(oop holder) {
1467   return holder->obj_field(_group_offset);
1468 }
1469 
1470 ThreadPriority java_lang_Thread_FieldHolder::priority(oop holder) {
1471   return (ThreadPriority)holder->int_field(_priority_offset);
1472 }
1473 
1474 void java_lang_Thread_FieldHolder::set_priority(oop holder, ThreadPriority priority) {
1475   holder->int_field_put(_priority_offset, priority);
1476 }
1477 
1478 jlong java_lang_Thread_FieldHolder::stackSize(oop holder) {
1479   return holder->long_field(_stackSize_offset);
1480 }
1481 
1482 bool java_lang_Thread_FieldHolder::is_daemon(oop holder) {
1483   return holder->bool_field(_daemon_offset) != 0;
1484 }
1485 
1486 void java_lang_Thread_FieldHolder::set_daemon(oop holder, bool val) {
1487   assert(val, "daemon status is never turned off");
1488   holder->bool_field_put(_daemon_offset, val);
1489 }
1490 
1491 void java_lang_Thread_FieldHolder::set_thread_status(oop holder, JavaThreadStatus status) {
1492   holder->int_field_put(_thread_status_offset, static_cast<int>(status));
1493 }
1494 
1495 JavaThreadStatus java_lang_Thread_FieldHolder::get_thread_status(oop holder) {
1496   return static_cast<JavaThreadStatus>(holder->int_field(_thread_status_offset));
1497 }
1498 
1499 
1500 int java_lang_Thread_Constants::_static_VTHREAD_GROUP_offset = 0;
1501 
1502 #define THREAD_CONSTANTS_STATIC_FIELDS_DO(macro) \
1503   macro(_static_VTHREAD_GROUP_offset,             k, "VTHREAD_GROUP",             threadgroup_signature, true);
1504 
1505 void java_lang_Thread_Constants::compute_offsets() {
1506   assert(_static_VTHREAD_GROUP_offset == 0, "offsets should be initialized only once");
1507 
1508   InstanceKlass* k = vmClasses::Thread_Constants_klass();
1509   THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1510 }
1511 
1512 #if INCLUDE_CDS
1513 void java_lang_Thread_Constants::serialize_offsets(SerializeClosure* f) {
1514   THREAD_CONSTANTS_STATIC_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1515 }
1516 #endif
1517 
1518 oop java_lang_Thread_Constants::get_VTHREAD_GROUP() {
1519   InstanceKlass* k = vmClasses::Thread_Constants_klass();
1520   oop base = k->static_field_base_raw();
1521   return base->obj_field(_static_VTHREAD_GROUP_offset);
1522 }
1523 
1524 
1525 int java_lang_Thread::_holder_offset;
1526 int java_lang_Thread::_name_offset;
1527 int java_lang_Thread::_contextClassLoader_offset;
1528 int java_lang_Thread::_inheritedAccessControlContext_offset;
1529 int java_lang_Thread::_eetop_offset;
1530 int java_lang_Thread::_jvmti_thread_state_offset;
1531 int java_lang_Thread::_jvmti_VTMS_transition_disable_count_offset;
1532 int java_lang_Thread::_jvmti_is_in_VTMS_transition_offset;
1533 int java_lang_Thread::_interrupted_offset;
1534 int java_lang_Thread::_tid_offset;
1535 int java_lang_Thread::_continuation_offset;
1536 int java_lang_Thread::_park_blocker_offset;
1537 int java_lang_Thread::_scopedValueBindings_offset;
1538 JFR_ONLY(int java_lang_Thread::_jfr_epoch_offset;)
1539 
1540 #define THREAD_FIELDS_DO(macro) \
1541   macro(_holder_offset,        k, "holder", thread_fieldholder_signature, false); \
1542   macro(_name_offset,          k, vmSymbols::name_name(), string_signature, false); \
1543   macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \
1544   macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \
1545   macro(_eetop_offset,         k, "eetop", long_signature, false); \
1546   macro(_interrupted_offset,   k, "interrupted", bool_signature, false); \
1547   macro(_tid_offset,           k, "tid", long_signature, false); \
1548   macro(_park_blocker_offset,  k, "parkBlocker", object_signature, false); \
1549   macro(_continuation_offset,  k, "cont", continuation_signature, false); \
1550   macro(_scopedValueBindings_offset, k, "scopedValueBindings", object_signature, false);
1551 
1552 void java_lang_Thread::compute_offsets() {
1553   assert(_holder_offset == 0, "offsets should be initialized only once");
1554 
1555   InstanceKlass* k = vmClasses::Thread_klass();
1556   THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1557   THREAD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1558 }
1559 
1560 #if INCLUDE_CDS
1561 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1562   THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1563   THREAD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1564 }
1565 #endif
1566 
1567 JavaThread* java_lang_Thread::thread(oop java_thread) {
1568   return reinterpret_cast<JavaThread*>(java_thread->address_field(_eetop_offset));
1569 }
1570 
1571 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1572   java_thread->address_field_put(_eetop_offset, (address)thread);
1573 }
1574 
1575 JvmtiThreadState* java_lang_Thread::jvmti_thread_state(oop java_thread) {
1576   return (JvmtiThreadState*)java_thread->address_field(_jvmti_thread_state_offset);
1577 }
1578 
1579 void java_lang_Thread::set_jvmti_thread_state(oop java_thread, JvmtiThreadState* state) {
1580   java_thread->address_field_put(_jvmti_thread_state_offset, (address)state);
1581 }
1582 
1583 int java_lang_Thread::VTMS_transition_disable_count(oop java_thread) {
1584   return java_thread->int_field(_jvmti_VTMS_transition_disable_count_offset);
1585 }
1586 
1587 void java_lang_Thread::inc_VTMS_transition_disable_count(oop java_thread) {
1588   assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1589   int val = VTMS_transition_disable_count(java_thread);
1590   java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val + 1);
1591 }
1592 
1593 void java_lang_Thread::dec_VTMS_transition_disable_count(oop java_thread) {
1594   assert(JvmtiVTMSTransition_lock->owned_by_self(), "Must be locked");
1595   int val = VTMS_transition_disable_count(java_thread);
1596   assert(val > 0, "VTMS_transition_disable_count should never be negative");
1597   java_thread->int_field_put(_jvmti_VTMS_transition_disable_count_offset, val - 1);
1598 }
1599 
1600 bool java_lang_Thread::is_in_VTMS_transition(oop java_thread) {
1601   return java_thread->bool_field_volatile(_jvmti_is_in_VTMS_transition_offset);
1602 }
1603 
1604 void java_lang_Thread::set_is_in_VTMS_transition(oop java_thread, bool val) {
1605   java_thread->bool_field_put_volatile(_jvmti_is_in_VTMS_transition_offset, val);
1606 }
1607 
1608 void java_lang_Thread::clear_scopedValueBindings(oop java_thread) {
1609   assert(java_thread != nullptr, "need a java_lang_Thread pointer here");
1610   java_thread->obj_field_put(_scopedValueBindings_offset, nullptr);
1611 }
1612 
1613 oop java_lang_Thread::holder(oop java_thread) {
1614   // Note: may return null if the thread is still attaching
1615   return java_thread->obj_field(_holder_offset);
1616 }
1617 
1618 bool java_lang_Thread::interrupted(oop java_thread) {
1619   // Make sure the caller can safely access oops.
1620   assert(Thread::current()->is_VM_thread() ||
1621          (JavaThread::current()->thread_state() != _thread_blocked &&
1622           JavaThread::current()->thread_state() != _thread_in_native),
1623          "Unsafe access to oop");
1624   return java_thread->bool_field_volatile(_interrupted_offset);
1625 }
1626 
1627 void java_lang_Thread::set_interrupted(oop java_thread, bool val) {
1628   // Make sure the caller can safely access oops.
1629   assert(Thread::current()->is_VM_thread() ||
1630          (JavaThread::current()->thread_state() != _thread_blocked &&
1631           JavaThread::current()->thread_state() != _thread_in_native),
1632          "Unsafe access to oop");
1633   java_thread->bool_field_put_volatile(_interrupted_offset, val);
1634 }
1635 
1636 
1637 oop java_lang_Thread::name(oop java_thread) {
1638   return java_thread->obj_field(_name_offset);
1639 }
1640 
1641 
1642 void java_lang_Thread::set_name(oop java_thread, oop name) {
1643   java_thread->obj_field_put(_name_offset, name);
1644 }
1645 
1646 // Convenience macros for setting and getting Thread fields that
1647 // are actually stored in the FieldHolder object of the thread.
1648 // The FieldHolder can be null whilst a thread is attaching via
1649 // JNI, and when the main thread is attaching.
1650 
1651 // The default value should be the default/zero initialized value
1652 // of the field as it would be in java.lang.Thread.FieldHolder.
1653 #define GET_FIELDHOLDER_FIELD(java_thread, field, default_val)  \
1654   {                                                             \
1655     oop holder = java_lang_Thread::holder(java_thread);         \
1656     if (holder != nullptr)                                      \
1657       return java_lang_Thread_FieldHolder::field(holder);       \
1658     else                                                        \
1659       return default_val;                                       \
1660   }
1661 
1662 // We should never be trying to set a field of an attaching thread.
1663 #define SET_FIELDHOLDER_FIELD(java_thread, field, value)        \
1664   {                                                             \
1665     oop holder = java_lang_Thread::holder(java_thread);         \
1666     assert(holder != nullptr, "Thread not fully initialized");  \
1667     java_lang_Thread_FieldHolder::set_##field(holder, value);   \
1668   }
1669 
1670 
1671 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1672   GET_FIELDHOLDER_FIELD(java_thread, priority, (ThreadPriority)0);
1673 }
1674 
1675 
1676 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1677   SET_FIELDHOLDER_FIELD(java_thread, priority, priority)
1678 }
1679 
1680 
1681 oop java_lang_Thread::threadGroup(oop java_thread) {
1682   GET_FIELDHOLDER_FIELD(java_thread, threadGroup, nullptr);
1683 }
1684 
1685 
1686 bool java_lang_Thread::is_alive(oop java_thread) {
1687   JavaThread* thr = java_lang_Thread::thread(java_thread);
1688   return (thr != nullptr);
1689 }
1690 
1691 
1692 bool java_lang_Thread::is_daemon(oop java_thread) {
1693   GET_FIELDHOLDER_FIELD(java_thread, is_daemon, false);
1694 }
1695 
1696 
1697 void java_lang_Thread::set_daemon(oop java_thread) {
1698   SET_FIELDHOLDER_FIELD(java_thread, daemon, true);
1699 }
1700 
1701 oop java_lang_Thread::context_class_loader(oop java_thread) {
1702   return java_thread->obj_field(_contextClassLoader_offset);
1703 }
1704 
1705 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1706   return java_thread->obj_field(_inheritedAccessControlContext_offset);
1707 }
1708 
1709 
1710 jlong java_lang_Thread::stackSize(oop java_thread) {
1711   GET_FIELDHOLDER_FIELD(java_thread, stackSize, 0);
1712 }
1713 
1714 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1715 void java_lang_Thread::set_thread_status(oop java_thread, JavaThreadStatus status) {
1716   SET_FIELDHOLDER_FIELD(java_thread, thread_status, status);
1717 }
1718 
1719 // Read thread status value from threadStatus field in java.lang.Thread java class.
1720 JavaThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1721   // Make sure the caller is operating on behalf of the VM or is
1722   // running VM code (state == _thread_in_vm).
1723   assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1724          JavaThread::current()->thread_state() == _thread_in_vm,
1725          "Java Thread is not running in vm");
1726   GET_FIELDHOLDER_FIELD(java_thread, get_thread_status, JavaThreadStatus::NEW /* not initialized */);
1727 }
1728 
1729 ByteSize java_lang_Thread::thread_id_offset() {
1730   return in_ByteSize(_tid_offset);
1731 }
1732 
1733 oop java_lang_Thread::park_blocker(oop java_thread) {
1734   return java_thread->obj_field(_park_blocker_offset);
1735 }
1736 
1737 oop java_lang_Thread::async_get_stack_trace(oop java_thread, TRAPS) {
1738   ThreadsListHandle tlh(JavaThread::current());
1739   JavaThread* thread;
1740   bool is_virtual = java_lang_VirtualThread::is_instance(java_thread);
1741   if (is_virtual) {
1742     oop carrier_thread = java_lang_VirtualThread::carrier_thread(java_thread);
1743     if (carrier_thread == nullptr) {
1744       return nullptr;
1745     }
1746     thread = java_lang_Thread::thread(carrier_thread);
1747   } else {
1748     thread = java_lang_Thread::thread(java_thread);
1749   }
1750   if (thread == nullptr) {
1751     return nullptr;
1752   }
1753 
1754   class GetStackTraceClosure : public HandshakeClosure {
1755   public:
1756     const Handle _java_thread;
1757     int _depth;
1758     bool _retry_handshake;
1759     GrowableArray<Method*>* _methods;
1760     GrowableArray<int>*     _bcis;
1761 
1762     GetStackTraceClosure(Handle java_thread) :
1763         HandshakeClosure("GetStackTraceClosure"), _java_thread(java_thread), _depth(0), _retry_handshake(false),
1764         _methods(nullptr), _bcis(nullptr) {
1765     }
1766     ~GetStackTraceClosure() {
1767       delete _methods;
1768       delete _bcis;
1769     }
1770 
1771     bool read_reset_retry() {
1772       bool ret = _retry_handshake;
1773       // If we re-execute the handshake this method need to return false
1774       // when the handshake cannot be performed. (E.g. thread terminating)
1775       _retry_handshake = false;
1776       return ret;
1777     }
1778 
1779     void do_thread(Thread* th) {
1780       if (!Thread::current()->is_Java_thread()) {
1781         _retry_handshake = true;
1782         return;
1783       }
1784 
1785       JavaThread* thread = JavaThread::cast(th);
1786 
1787       if (!thread->has_last_Java_frame()) {
1788         return;
1789       }
1790 
1791       bool carrier = false;
1792       if (java_lang_VirtualThread::is_instance(_java_thread())) {
1793         // if (thread->vthread() != _java_thread()) // We might be inside a System.executeOnCarrierThread
1794         const ContinuationEntry* ce = thread->vthread_continuation();
1795         if (ce == nullptr || ce->cont_oop(thread) != java_lang_VirtualThread::continuation(_java_thread())) {
1796           return; // not mounted
1797         }
1798       } else {
1799         carrier = (thread->vthread_continuation() != nullptr);
1800       }
1801 
1802       const int max_depth = MaxJavaStackTraceDepth;
1803       const bool skip_hidden = !ShowHiddenFrames;
1804 
1805       // Pick minimum length that will cover most cases
1806       int init_length = 64;
1807       _methods = new (mtInternal) GrowableArray<Method*>(init_length, mtInternal);
1808       _bcis = new (mtInternal) GrowableArray<int>(init_length, mtInternal);
1809 
1810       int total_count = 0;
1811       for (vframeStream vfst(thread, false, false, carrier); // we don't process frames as we don't care about oops
1812            !vfst.at_end() && (max_depth == 0 || max_depth != total_count);
1813            vfst.next()) {
1814 
1815         if (skip_hidden && (vfst.method()->is_hidden() ||
1816                             vfst.method()->is_continuation_enter_intrinsic())) {
1817           continue;
1818         }
1819 
1820         _methods->push(vfst.method());
1821         _bcis->push(vfst.bci());
1822         total_count++;
1823       }
1824 
1825       _depth = total_count;
1826     }
1827   };
1828 
1829   // Handshake with target
1830   ResourceMark rm(THREAD);
1831   HandleMark   hm(THREAD);
1832   GetStackTraceClosure gstc(Handle(THREAD, java_thread));
1833   do {
1834    Handshake::execute(&gstc, &tlh, thread);
1835   } while (gstc.read_reset_retry());
1836 
1837   // Stop if no stack trace is found.
1838   if (gstc._depth == 0) {
1839     return nullptr;
1840   }
1841 
1842   // Convert to StackTraceElement array
1843   InstanceKlass* k = vmClasses::StackTraceElement_klass();
1844   assert(k != nullptr, "must be loaded in 1.4+");
1845   if (k->should_be_initialized()) {
1846     k->initialize(CHECK_NULL);
1847   }
1848   objArrayHandle trace = oopFactory::new_objArray_handle(k, gstc._depth, CHECK_NULL);
1849 
1850   for (int i = 0; i < gstc._depth; i++) {
1851     methodHandle method(THREAD, gstc._methods->at(i));
1852     oop element = java_lang_StackTraceElement::create(method,
1853                                                       gstc._bcis->at(i),
1854                                                       CHECK_NULL);
1855     trace->obj_at_put(i, element);
1856   }
1857 
1858   return trace();
1859 }
1860 
1861 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1862   JavaThreadStatus status = get_thread_status(java_thread);
1863   switch (status) {
1864     case JavaThreadStatus::NEW                      : return "NEW";
1865     case JavaThreadStatus::RUNNABLE                 : return "RUNNABLE";
1866     case JavaThreadStatus::SLEEPING                 : return "TIMED_WAITING (sleeping)";
1867     case JavaThreadStatus::IN_OBJECT_WAIT           : return "WAITING (on object monitor)";
1868     case JavaThreadStatus::IN_OBJECT_WAIT_TIMED     : return "TIMED_WAITING (on object monitor)";
1869     case JavaThreadStatus::PARKED                   : return "WAITING (parking)";
1870     case JavaThreadStatus::PARKED_TIMED             : return "TIMED_WAITING (parking)";
1871     case JavaThreadStatus::BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1872     case JavaThreadStatus::TERMINATED               : return "TERMINATED";
1873     default                       : return "UNKNOWN";
1874   };
1875 }
1876 int java_lang_ThreadGroup::_parent_offset;
1877 int java_lang_ThreadGroup::_name_offset;
1878 int java_lang_ThreadGroup::_maxPriority_offset;
1879 int java_lang_ThreadGroup::_daemon_offset;
1880 
1881 oop  java_lang_ThreadGroup::parent(oop java_thread_group) {
1882   assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1883   return java_thread_group->obj_field(_parent_offset);
1884 }
1885 
1886 // ("name as oop" accessor is not necessary)
1887 
1888 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
1889   oop name = java_thread_group->obj_field(_name_offset);
1890   // ThreadGroup.name can be null
1891   if (name != nullptr) {
1892     return java_lang_String::as_utf8_string(name);
1893   }
1894   return nullptr;
1895 }
1896 
1897 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1898   assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1899   return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1900 }
1901 
1902 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1903   assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1904   return java_thread_group->bool_field(_daemon_offset) != 0;
1905 }
1906 
1907 #define THREADGROUP_FIELDS_DO(macro) \
1908   macro(_parent_offset,      k, vmSymbols::parent_name(),      threadgroup_signature,         false); \
1909   macro(_name_offset,        k, vmSymbols::name_name(),        string_signature,              false); \
1910   macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature,                 false); \
1911   macro(_daemon_offset,      k, vmSymbols::daemon_name(),      bool_signature,                false);
1912 
1913 void java_lang_ThreadGroup::compute_offsets() {
1914   assert(_parent_offset == 0, "offsets should be initialized only once");
1915 
1916   InstanceKlass* k = vmClasses::ThreadGroup_klass();
1917   THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1918 }
1919 
1920 #if INCLUDE_CDS
1921 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
1922   THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1923 }
1924 #endif
1925 
1926 
1927 // java_lang_VirtualThread
1928 
1929 int java_lang_VirtualThread::static_vthread_scope_offset;
1930 int java_lang_VirtualThread::_carrierThread_offset;
1931 int java_lang_VirtualThread::_continuation_offset;
1932 int java_lang_VirtualThread::_state_offset;
1933 
1934 #define VTHREAD_FIELDS_DO(macro) \
1935   macro(static_vthread_scope_offset,       k, "VTHREAD_SCOPE",      continuationscope_signature, true);  \
1936   macro(_carrierThread_offset,             k, "carrierThread",      thread_signature,            false); \
1937   macro(_continuation_offset,              k, "cont",               continuation_signature,      false); \
1938   macro(_state_offset,                     k, "state",              int_signature,               false)
1939 
1940 
1941 void java_lang_VirtualThread::compute_offsets() {
1942   InstanceKlass* k = vmClasses::VirtualThread_klass();
1943   VTHREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1944 }
1945 
1946 bool java_lang_VirtualThread::is_instance(oop obj) {
1947   return obj != nullptr && is_subclass(obj->klass());
1948 }
1949 
1950 oop java_lang_VirtualThread::carrier_thread(oop vthread) {
1951   oop thread = vthread->obj_field(_carrierThread_offset);
1952   return thread;
1953 }
1954 
1955 oop java_lang_VirtualThread::continuation(oop vthread) {
1956   oop cont = vthread->obj_field(_continuation_offset);
1957   return cont;
1958 }
1959 
1960 int java_lang_VirtualThread::state(oop vthread) {
1961   return vthread->int_field_acquire(_state_offset);
1962 }
1963 
1964 JavaThreadStatus java_lang_VirtualThread::map_state_to_thread_status(int state) {
1965   JavaThreadStatus status = JavaThreadStatus::NEW;
1966   switch (state) {
1967     case NEW :
1968       status = JavaThreadStatus::NEW;
1969       break;
1970     case STARTED :
1971     case RUNNABLE :
1972     case RUNNABLE_SUSPENDED :
1973     case RUNNING :
1974     case PARKING :
1975     case YIELDING :
1976       status = JavaThreadStatus::RUNNABLE;
1977       break;
1978     case PARKED :
1979     case PARKED_SUSPENDED :
1980     case PINNED :
1981       status = JavaThreadStatus::PARKED;
1982       break;
1983     case TERMINATED :
1984       status = JavaThreadStatus::TERMINATED;
1985       break;
1986     default:
1987       ShouldNotReachHere();
1988   }
1989   return status;
1990 }
1991 
1992 #if INCLUDE_CDS
1993 void java_lang_VirtualThread::serialize_offsets(SerializeClosure* f) {
1994    VTHREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1995 }
1996 #endif
1997 
1998 // java_lang_Throwable
1999 
2000 int java_lang_Throwable::_backtrace_offset;
2001 int java_lang_Throwable::_detailMessage_offset;
2002 int java_lang_Throwable::_stackTrace_offset;
2003 int java_lang_Throwable::_depth_offset;
2004 int java_lang_Throwable::_cause_offset;
2005 int java_lang_Throwable::_static_unassigned_stacktrace_offset;
2006 
2007 #define THROWABLE_FIELDS_DO(macro) \
2008   macro(_backtrace_offset,     k, "backtrace",     object_signature,                  false); \
2009   macro(_detailMessage_offset, k, "detailMessage", string_signature,                  false); \
2010   macro(_stackTrace_offset,    k, "stackTrace",    java_lang_StackTraceElement_array, false); \
2011   macro(_depth_offset,         k, "depth",         int_signature,                     false); \
2012   macro(_cause_offset,         k, "cause",         throwable_signature,               false); \
2013   macro(_static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
2014 
2015 void java_lang_Throwable::compute_offsets() {
2016   InstanceKlass* k = vmClasses::Throwable_klass();
2017   THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2018 }
2019 
2020 #if INCLUDE_CDS
2021 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
2022   THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2023 }
2024 #endif
2025 
2026 oop java_lang_Throwable::unassigned_stacktrace() {
2027   InstanceKlass* ik = vmClasses::Throwable_klass();
2028   oop base = ik->static_field_base_raw();
2029   return base->obj_field(_static_unassigned_stacktrace_offset);
2030 }
2031 
2032 oop java_lang_Throwable::backtrace(oop throwable) {
2033   return throwable->obj_field_acquire(_backtrace_offset);
2034 }
2035 
2036 
2037 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
2038   throwable->release_obj_field_put(_backtrace_offset, value);
2039 }
2040 
2041 int java_lang_Throwable::depth(oop throwable) {
2042   return throwable->int_field(_depth_offset);
2043 }
2044 
2045 void java_lang_Throwable::set_depth(oop throwable, int value) {
2046   throwable->int_field_put(_depth_offset, value);
2047 }
2048 
2049 oop java_lang_Throwable::message(oop throwable) {
2050   return throwable->obj_field(_detailMessage_offset);
2051 }
2052 
2053 oop java_lang_Throwable::cause(oop throwable) {
2054   return throwable->obj_field(_cause_offset);
2055 }
2056 
2057 // Return Symbol for detailed_message or null
2058 Symbol* java_lang_Throwable::detail_message(oop throwable) {
2059   PreserveExceptionMark pm(Thread::current());
2060   oop detailed_message = java_lang_Throwable::message(throwable);
2061   if (detailed_message != nullptr) {
2062     return java_lang_String::as_symbol(detailed_message);
2063   }
2064   return nullptr;
2065 }
2066 
2067 void java_lang_Throwable::set_message(oop throwable, oop value) {
2068   throwable->obj_field_put(_detailMessage_offset, value);
2069 }
2070 
2071 
2072 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
2073   throwable->obj_field_put(_stackTrace_offset, st_element_array);
2074 }
2075 
2076 void java_lang_Throwable::clear_stacktrace(oop throwable) {
2077   set_stacktrace(throwable, nullptr);
2078 }
2079 
2080 
2081 void java_lang_Throwable::print(oop throwable, outputStream* st) {
2082   ResourceMark rm;
2083   Klass* k = throwable->klass();
2084   assert(k != nullptr, "just checking");
2085   st->print("%s", k->external_name());
2086   oop msg = message(throwable);
2087   if (msg != nullptr) {
2088     st->print(": %s", java_lang_String::as_utf8_string(msg));
2089   }
2090 }
2091 
2092 // After this many redefines, the stack trace is unreliable.
2093 const int MAX_VERSION = USHRT_MAX;
2094 
2095 static inline bool version_matches(Method* method, int version) {
2096   assert(version < MAX_VERSION, "version is too big");
2097   return method != nullptr && (method->constants()->version() == version);
2098 }
2099 
2100 // This class provides a simple wrapper over the internal structure of
2101 // exception backtrace to insulate users of the backtrace from needing
2102 // to know what it looks like.
2103 // The code of this class is not GC safe. Allocations can only happen
2104 // in expand().
2105 class BacktraceBuilder: public StackObj {
2106  friend class BacktraceIterator;
2107  private:
2108   Handle          _backtrace;
2109   objArrayOop     _head;
2110   typeArrayOop    _methods;
2111   typeArrayOop    _bcis;
2112   objArrayOop     _mirrors;
2113   typeArrayOop    _names; // Needed to insulate method name against redefinition.
2114   // True if the top frame of the backtrace is omitted because it shall be hidden.
2115   bool            _has_hidden_top_frame;
2116   int             _index;
2117   NoSafepointVerifier _nsv;
2118 
2119   enum {
2120     trace_methods_offset = java_lang_Throwable::trace_methods_offset,
2121     trace_bcis_offset    = java_lang_Throwable::trace_bcis_offset,
2122     trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
2123     trace_names_offset   = java_lang_Throwable::trace_names_offset,
2124     trace_conts_offset   = java_lang_Throwable::trace_conts_offset,
2125     trace_next_offset    = java_lang_Throwable::trace_next_offset,
2126     trace_hidden_offset  = java_lang_Throwable::trace_hidden_offset,
2127     trace_size           = java_lang_Throwable::trace_size,
2128     trace_chunk_size     = java_lang_Throwable::trace_chunk_size
2129   };
2130 
2131   // get info out of chunks
2132   static typeArrayOop get_methods(objArrayHandle chunk) {
2133     typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
2134     assert(methods != nullptr, "method array should be initialized in backtrace");
2135     return methods;
2136   }
2137   static typeArrayOop get_bcis(objArrayHandle chunk) {
2138     typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
2139     assert(bcis != nullptr, "bci array should be initialized in backtrace");
2140     return bcis;
2141   }
2142   static objArrayOop get_mirrors(objArrayHandle chunk) {
2143     objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
2144     assert(mirrors != nullptr, "mirror array should be initialized in backtrace");
2145     return mirrors;
2146   }
2147   static typeArrayOop get_names(objArrayHandle chunk) {
2148     typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2149     assert(names != nullptr, "names array should be initialized in backtrace");
2150     return names;
2151   }
2152   static bool has_hidden_top_frame(objArrayHandle chunk) {
2153     oop hidden = chunk->obj_at(trace_hidden_offset);
2154     return hidden != nullptr;
2155   }
2156 
2157  public:
2158 
2159   // constructor for new backtrace
2160   BacktraceBuilder(TRAPS): _head(nullptr), _methods(nullptr), _bcis(nullptr), _mirrors(nullptr), _names(nullptr), _has_hidden_top_frame(false) {
2161     expand(CHECK);
2162     _backtrace = Handle(THREAD, _head);
2163     _index = 0;
2164   }
2165 
2166   BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2167     _methods = get_methods(backtrace);
2168     _bcis = get_bcis(backtrace);
2169     _mirrors = get_mirrors(backtrace);
2170     _names = get_names(backtrace);
2171     _has_hidden_top_frame = has_hidden_top_frame(backtrace);
2172     assert(_methods->length() == _bcis->length() &&
2173            _methods->length() == _mirrors->length() &&
2174            _mirrors->length() == _names->length(),
2175            "method and source information arrays should match");
2176 
2177     // head is the preallocated backtrace
2178     _head = backtrace();
2179     _backtrace = Handle(thread, _head);
2180     _index = 0;
2181   }
2182 
2183   void expand(TRAPS) {
2184     objArrayHandle old_head(THREAD, _head);
2185     PauseNoSafepointVerifier pnsv(&_nsv);
2186 
2187     objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2188     objArrayHandle new_head(THREAD, head);
2189 
2190     typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2191     typeArrayHandle new_methods(THREAD, methods);
2192 
2193     typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2194     typeArrayHandle new_bcis(THREAD, bcis);
2195 
2196     objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2197     objArrayHandle new_mirrors(THREAD, mirrors);
2198 
2199     typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2200     typeArrayHandle new_names(THREAD, names);
2201 
2202     if (!old_head.is_null()) {
2203       old_head->obj_at_put(trace_next_offset, new_head());
2204     }
2205     new_head->obj_at_put(trace_methods_offset, new_methods());
2206     new_head->obj_at_put(trace_bcis_offset, new_bcis());
2207     new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2208     new_head->obj_at_put(trace_names_offset, new_names());
2209     new_head->obj_at_put(trace_hidden_offset, nullptr);
2210 
2211     _head    = new_head();
2212     _methods = new_methods();
2213     _bcis = new_bcis();
2214     _mirrors = new_mirrors();
2215     _names  = new_names();
2216     _index = 0;
2217   }
2218 
2219   oop backtrace() {
2220     return _backtrace();
2221   }
2222 
2223   inline void push(Method* method, int bci, TRAPS) {
2224     // Smear the -1 bci to 0 since the array only holds unsigned
2225     // shorts.  The later line number lookup would just smear the -1
2226     // to a 0 even if it could be recorded.
2227     if (bci == SynchronizationEntryBCI) bci = 0;
2228 
2229     if (_index >= trace_chunk_size) {
2230       methodHandle mhandle(THREAD, method);
2231       expand(CHECK);
2232       method = mhandle();
2233     }
2234 
2235     _methods->ushort_at_put(_index, method->orig_method_idnum());
2236     _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2237 
2238     // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2239     // klass owning the symbols alive so their refcounts aren't decremented.
2240     Symbol* name = method->name();
2241     _names->symbol_at_put(_index, name);
2242 
2243     // We need to save the mirrors in the backtrace to keep the class
2244     // from being unloaded while we still have this stack trace.
2245     assert(method->method_holder()->java_mirror() != nullptr, "never push null for mirror");
2246     _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2247 
2248     _index++;
2249   }
2250 
2251   void set_has_hidden_top_frame() {
2252     if (!_has_hidden_top_frame) {
2253       // It would be nice to add java/lang/Boolean::TRUE here
2254       // to indicate that this backtrace has a hidden top frame.
2255       // But this code is used before TRUE is allocated.
2256       // Therefore let's just use an arbitrary legal oop
2257       // available right here. _methods is a short[].
2258       assert(_methods != nullptr, "we need a legal oop");
2259       _has_hidden_top_frame = true;
2260       _head->obj_at_put(trace_hidden_offset, _methods);
2261     }
2262   }
2263 };
2264 
2265 struct BacktraceElement : public StackObj {
2266   int _method_id;
2267   int _bci;
2268   int _version;
2269   Symbol* _name;
2270   Handle _mirror;
2271   BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2272                    _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2273 };
2274 
2275 class BacktraceIterator : public StackObj {
2276   int _index;
2277   objArrayHandle  _result;
2278   objArrayHandle  _mirrors;
2279   typeArrayHandle _methods;
2280   typeArrayHandle _bcis;
2281   typeArrayHandle _names;
2282 
2283   void init(objArrayHandle result, Thread* thread) {
2284     // Get method id, bci, version and mirror from chunk
2285     _result = result;
2286     if (_result.not_null()) {
2287       _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2288       _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2289       _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2290       _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2291       _index = 0;
2292     }
2293   }
2294  public:
2295   BacktraceIterator(objArrayHandle result, Thread* thread) {
2296     init(result, thread);
2297     assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2298   }
2299 
2300   BacktraceElement next(Thread* thread) {
2301     BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2302                         _methods->ushort_at(_index),
2303                         Backtrace::version_at(_bcis->int_at(_index)),
2304                         Backtrace::bci_at(_bcis->int_at(_index)),
2305                         _names->symbol_at(_index));
2306     _index++;
2307 
2308     if (_index >= java_lang_Throwable::trace_chunk_size) {
2309       int next_offset = java_lang_Throwable::trace_next_offset;
2310       // Get next chunk
2311       objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2312       init(result, thread);
2313     }
2314     return e;
2315   }
2316 
2317   bool repeat() {
2318     return _result.not_null() && _mirrors->obj_at(_index) != nullptr;
2319   }
2320 };
2321 
2322 
2323 // Print stack trace element to resource allocated buffer
2324 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2325                                           int version, int bci, Symbol* name) {
2326   ResourceMark rm;
2327 
2328   // Get strings and string lengths
2329   InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2330   const char* klass_name  = holder->external_name();
2331   int buf_len = (int)strlen(klass_name);
2332 
2333   char* method_name = name->as_C_string();
2334   buf_len += (int)strlen(method_name);
2335 
2336   char* source_file_name = nullptr;
2337   Symbol* source = Backtrace::get_source_file_name(holder, version);
2338   if (source != nullptr) {
2339     source_file_name = source->as_C_string();
2340     buf_len += (int)strlen(source_file_name);
2341   }
2342 
2343   char *module_name = nullptr, *module_version = nullptr;
2344   ModuleEntry* module = holder->module();
2345   if (module->is_named()) {
2346     module_name = module->name()->as_C_string();
2347     buf_len += (int)strlen(module_name);
2348     if (module->version() != nullptr) {
2349       module_version = module->version()->as_C_string();
2350       buf_len += (int)strlen(module_version);
2351     }
2352   }
2353 
2354   // Allocate temporary buffer with extra space for formatting and line number
2355   const size_t buf_size = buf_len + 64;
2356   char* buf = NEW_RESOURCE_ARRAY(char, buf_size);
2357 
2358   // Print stack trace line in buffer
2359   size_t buf_off = os::snprintf_checked(buf, buf_size, "\tat %s.%s(", klass_name, method_name);
2360 
2361   // Print module information
2362   if (module_name != nullptr) {
2363     if (module_version != nullptr) {
2364       buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s@%s/", module_name, module_version);
2365     } else {
2366       buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s/", module_name);
2367     }
2368   }
2369 
2370   // The method can be null if the requested class version is gone
2371   Method* method = holder->method_with_orig_idnum(method_id, version);
2372   if (!version_matches(method, version)) {
2373     strcat(buf, "Redefined)");
2374   } else {
2375     int line_number = Backtrace::get_line_number(method, bci);
2376     if (line_number == -2) {
2377       strcat(buf, "Native Method)");
2378     } else {
2379       if (source_file_name != nullptr && (line_number != -1)) {
2380         // Sourcename and linenumber
2381         buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s:%d)", source_file_name, line_number);
2382       } else if (source_file_name != nullptr) {
2383         // Just sourcename
2384         buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "%s)", source_file_name);
2385       } else {
2386         // Neither sourcename nor linenumber
2387         buf_off += os::snprintf_checked(buf + buf_off, buf_size - buf_off, "Unknown Source)");
2388       }
2389       CompiledMethod* nm = method->code();
2390       if (WizardMode && nm != nullptr) {
2391         os::snprintf_checked(buf + buf_off, buf_size - buf_off, "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
2392       }
2393     }
2394   }
2395 
2396   st->print_cr("%s", buf);
2397 }
2398 
2399 void java_lang_Throwable::print_stack_element(outputStream *st, Method* method, int bci) {
2400   Handle mirror (Thread::current(),  method->method_holder()->java_mirror());
2401   int method_id = method->orig_method_idnum();
2402   int version = method->constants()->version();
2403   print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2404 }
2405 
2406 /**
2407  * Print the throwable message and its stack trace plus all causes by walking the
2408  * cause chain.  The output looks the same as of Throwable.printStackTrace().
2409  */
2410 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2411   // First, print the message.
2412   print(throwable(), st);
2413   st->cr();
2414 
2415   // Now print the stack trace.
2416   JavaThread* THREAD = JavaThread::current(); // For exception macros.
2417   while (throwable.not_null()) {
2418     objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2419     if (result.is_null()) {
2420       st->print_raw_cr("\t<<no stack trace available>>");
2421       return;
2422     }
2423     BacktraceIterator iter(result, THREAD);
2424 
2425     while (iter.repeat()) {
2426       BacktraceElement bte = iter.next(THREAD);
2427       print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2428     }
2429     {
2430       // Call getCause() which doesn't necessarily return the _cause field.
2431       ExceptionMark em(THREAD);
2432       JavaValue cause(T_OBJECT);
2433       JavaCalls::call_virtual(&cause,
2434                               throwable,
2435                               throwable->klass(),
2436                               vmSymbols::getCause_name(),
2437                               vmSymbols::void_throwable_signature(),
2438                               THREAD);
2439       // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2440       if (HAS_PENDING_EXCEPTION) {
2441         CLEAR_PENDING_EXCEPTION;
2442         throwable = Handle();
2443       } else {
2444         throwable = Handle(THREAD, cause.get_oop());
2445         if (throwable.not_null()) {
2446           st->print("Caused by: ");
2447           print(throwable(), st);
2448           st->cr();
2449         }
2450       }
2451     }
2452   }
2453 }
2454 
2455 /**
2456  * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2457  */
2458 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2459   assert(throwable->is_a(vmClasses::Throwable_klass()), "Throwable instance expected");
2460   JavaValue result(T_VOID);
2461   JavaCalls::call_virtual(&result,
2462                           throwable,
2463                           vmClasses::Throwable_klass(),
2464                           vmSymbols::printStackTrace_name(),
2465                           vmSymbols::void_method_signature(),
2466                           THREAD);
2467 }
2468 
2469 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2470   if (!StackTraceInThrowable) return;
2471   ResourceMark rm(THREAD);
2472 
2473   // Start out by clearing the backtrace for this object, in case the VM
2474   // runs out of memory while allocating the stack trace
2475   set_backtrace(throwable(), nullptr);
2476   // Clear lazily constructed Java level stacktrace if refilling occurs
2477   // This is unnecessary in 1.7+ but harmless
2478   clear_stacktrace(throwable());
2479 
2480   int max_depth = MaxJavaStackTraceDepth;
2481   JavaThread* thread = THREAD;
2482 
2483   BacktraceBuilder bt(CHECK);
2484 
2485   // If there is no Java frame just return the method that was being called
2486   // with bci 0
2487   if (!thread->has_last_Java_frame()) {
2488     if (max_depth >= 1 && method() != nullptr) {
2489       bt.push(method(), 0, CHECK);
2490       log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2491       set_depth(throwable(), 1);
2492       set_backtrace(throwable(), bt.backtrace());
2493     }
2494     return;
2495   }
2496 
2497   // Instead of using vframe directly, this version of fill_in_stack_trace
2498   // basically handles everything by hand. This significantly improved the
2499   // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2500   // See bug 6333838 for  more details.
2501   // The "ASSERT" here is to verify this method generates the exactly same stack
2502   // trace as utilizing vframe.
2503 #ifdef ASSERT
2504   vframeStream st(thread, false /* stop_at_java_call_stub */, false /* process_frames */);
2505 #endif
2506   int total_count = 0;
2507   RegisterMap map(thread,
2508                   RegisterMap::UpdateMap::skip,
2509                   RegisterMap::ProcessFrames::skip,
2510                   RegisterMap::WalkContinuation::include);
2511   int decode_offset = 0;
2512   CompiledMethod* nm = nullptr;
2513   bool skip_fillInStackTrace_check = false;
2514   bool skip_throwableInit_check = false;
2515   bool skip_hidden = !ShowHiddenFrames;
2516   bool show_carrier = ShowCarrierFrames;
2517   ContinuationEntry* cont_entry = thread->last_continuation();
2518   for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2519     Method* method = nullptr;
2520     int bci = 0;
2521 
2522     // Compiled java method case.
2523     if (decode_offset != 0) {
2524       DebugInfoReadStream stream(nm, decode_offset);
2525       decode_offset = stream.read_int();
2526       method = (Method*)nm->metadata_at(stream.read_int());
2527       bci = stream.read_bci();
2528     } else {
2529       if (fr.is_first_frame()) break;
2530 
2531       if (Continuation::is_continuation_enterSpecial(fr)) {
2532         assert(cont_entry == Continuation::get_continuation_entry_for_entry_frame(thread, fr), "");
2533         if (!show_carrier && cont_entry->is_virtual_thread()) {
2534           break;
2535         }
2536         cont_entry = cont_entry->parent();
2537       }
2538 
2539       address pc = fr.pc();
2540       if (fr.is_interpreted_frame()) {
2541         address bcp;
2542         if (!map.in_cont()) {
2543           bcp = fr.interpreter_frame_bcp();
2544           method = fr.interpreter_frame_method();
2545         } else {
2546           bcp = map.stack_chunk()->interpreter_frame_bcp(fr);
2547           method = map.stack_chunk()->interpreter_frame_method(fr);
2548         }
2549         bci =  method->bci_from(bcp);
2550         fr = fr.sender(&map);
2551       } else {
2552         CodeBlob* cb = fr.cb();
2553         // HMMM QQQ might be nice to have frame return nm as null if cb is non-null
2554         // but non nmethod
2555         fr = fr.sender(&map);
2556         if (cb == nullptr || !cb->is_compiled()) {
2557           continue;
2558         }
2559         nm = cb->as_compiled_method();
2560         assert(nm->method() != nullptr, "must be");
2561         if (nm->method()->is_native()) {
2562           method = nm->method();
2563           bci = 0;
2564         } else {
2565           PcDesc* pd = nm->pc_desc_at(pc);
2566           decode_offset = pd->scope_decode_offset();
2567           // if decode_offset is not equal to 0, it will execute the
2568           // "compiled java method case" at the beginning of the loop.
2569           continue;
2570         }
2571       }
2572     }
2573 #ifdef ASSERT
2574     if (!st.at_end()) { // TODO LOOM remove once we show only vthread trace
2575       assert(st.method() == method && st.bci() == bci, "Wrong stack trace");
2576       st.next();
2577     }
2578 #endif
2579 
2580     // the format of the stacktrace will be:
2581     // - 1 or more fillInStackTrace frames for the exception class (skipped)
2582     // - 0 or more <init> methods for the exception class (skipped)
2583     // - rest of the stack
2584 
2585     if (!skip_fillInStackTrace_check) {
2586       if (method->name() == vmSymbols::fillInStackTrace_name() &&
2587           throwable->is_a(method->method_holder())) {
2588         continue;
2589       }
2590       else {
2591         skip_fillInStackTrace_check = true; // gone past them all
2592       }
2593     }
2594     if (!skip_throwableInit_check) {
2595       assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2596 
2597       // skip <init> methods of the exception class and superclasses
2598       // This is similar to classic VM.
2599       if (method->name() == vmSymbols::object_initializer_name() &&
2600           throwable->is_a(method->method_holder())) {
2601         continue;
2602       } else {
2603         // there are none or we've seen them all - either way stop checking
2604         skip_throwableInit_check = true;
2605       }
2606     }
2607     if (method->is_hidden() || method->is_continuation_enter_intrinsic()) {
2608       if (skip_hidden) {
2609         if (total_count == 0) {
2610           // The top frame will be hidden from the stack trace.
2611           bt.set_has_hidden_top_frame();
2612         }
2613         continue;
2614       }
2615     }
2616 
2617     bt.push(method, bci, CHECK);
2618     total_count++;
2619   }
2620 
2621   log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2622 
2623   // Put completed stack trace into throwable object
2624   set_backtrace(throwable(), bt.backtrace());
2625   set_depth(throwable(), total_count);
2626 }
2627 
2628 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2629   // No-op if stack trace is disabled
2630   if (!StackTraceInThrowable) {
2631     return;
2632   }
2633 
2634   // Disable stack traces for some preallocated out of memory errors
2635   if (!Universe::should_fill_in_stack_trace(throwable)) {
2636     return;
2637   }
2638 
2639   JavaThread* THREAD = JavaThread::current(); // For exception macros.
2640   PreserveExceptionMark pm(THREAD);
2641 
2642   fill_in_stack_trace(throwable, method, THREAD);
2643   // Ignore exceptions thrown during stack trace filling (OOM) and reinstall the
2644   // original exception via the PreserveExceptionMark destructor.
2645   CLEAR_PENDING_EXCEPTION;
2646 }
2647 
2648 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2649   // Allocate stack trace - backtrace is created but not filled in
2650 
2651   // No-op if stack trace is disabled
2652   if (!StackTraceInThrowable) return;
2653   BacktraceBuilder bt(CHECK);   // creates a backtrace
2654   set_backtrace(throwable(), bt.backtrace());
2655 }
2656 
2657 
2658 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2659   // Fill in stack trace into preallocated backtrace (no GC)
2660 
2661   // No-op if stack trace is disabled
2662   if (!StackTraceInThrowable) return;
2663 
2664   assert(throwable->is_a(vmClasses::Throwable_klass()), "sanity check");
2665 
2666   JavaThread* THREAD = JavaThread::current(); // For exception macros.
2667 
2668   objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2669   assert(backtrace.not_null(), "backtrace should have been preallocated");
2670 
2671   ResourceMark rm(THREAD);
2672   vframeStream st(THREAD, false /* stop_at_java_call_stub */, false /* process_frames */);
2673 
2674   BacktraceBuilder bt(THREAD, backtrace);
2675 
2676   // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2677   // methods as preallocated errors aren't created by "java" code.
2678 
2679   // fill in as much stack trace as possible
2680   int chunk_count = 0;
2681   for (;!st.at_end(); st.next()) {
2682     bt.push(st.method(), st.bci(), CHECK);
2683     chunk_count++;
2684 
2685     // Bail-out for deep stacks
2686     if (chunk_count >= trace_chunk_size) break;
2687   }
2688   set_depth(throwable(), chunk_count);
2689   log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2690 
2691   // We support the Throwable immutability protocol defined for Java 7.
2692   java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2693   assert(java_lang_Throwable::unassigned_stacktrace() != nullptr, "not initialized");
2694 }
2695 
2696 void java_lang_Throwable::get_stack_trace_elements(int depth, Handle backtrace,
2697                                                    objArrayHandle stack_trace_array_h, TRAPS) {
2698 
2699   if (backtrace.is_null() || stack_trace_array_h.is_null()) {
2700     THROW(vmSymbols::java_lang_NullPointerException());
2701   }
2702 
2703   assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2704 
2705   if (stack_trace_array_h->length() != depth) {
2706     THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2707   }
2708 
2709   objArrayHandle result(THREAD, objArrayOop(backtrace()));
2710   BacktraceIterator iter(result, THREAD);
2711 
2712   int index = 0;
2713   while (iter.repeat()) {
2714     BacktraceElement bte = iter.next(THREAD);
2715 
2716     Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2717 
2718     if (stack_trace_element.is_null()) {
2719       THROW(vmSymbols::java_lang_NullPointerException());
2720     }
2721 
2722     InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2723     methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2724 
2725     java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2726                                          method,
2727                                          bte._version,
2728                                          bte._bci,
2729                                          bte._name,
2730                                          CHECK);
2731   }
2732 }
2733 
2734 Handle java_lang_Throwable::create_initialization_error(JavaThread* current, Handle throwable) {
2735   // Creates an ExceptionInInitializerError to be recorded as the initialization error when class initialization
2736   // failed due to the passed in 'throwable'. We cannot save 'throwable' directly due to issues with keeping alive
2737   // all objects referenced via its stacktrace. So instead we save a new EIIE instance, with the same message and
2738   // symbolic stacktrace of 'throwable'.
2739   assert(throwable.not_null(), "shouldn't be");
2740 
2741   // Now create the message from the original exception and thread name.
2742   Symbol* message = java_lang_Throwable::detail_message(throwable());
2743   ResourceMark rm(current);
2744   stringStream st;
2745   st.print("Exception %s%s ", throwable()->klass()->name()->as_klass_external_name(),
2746              message == nullptr ? "" : ":");
2747   if (message == nullptr) {
2748     st.print("[in thread \"%s\"]", current->name());
2749   } else {
2750     st.print("%s [in thread \"%s\"]", message->as_C_string(), current->name());
2751   }
2752 
2753   Symbol* exception_name = vmSymbols::java_lang_ExceptionInInitializerError();
2754   Handle init_error = Exceptions::new_exception(current, exception_name, st.as_string());
2755   // If new_exception returns a different exception while creating the exception,
2756   // abandon the attempt to save the initialization error and return null.
2757   if (init_error->klass()->name() != exception_name) {
2758     log_info(class, init)("Exception thrown while saving initialization exception %s",
2759                         init_error->klass()->external_name());
2760     return Handle();
2761   }
2762 
2763   // Call to java to fill in the stack trace and clear declaringClassObject to
2764   // not keep classes alive in the stack trace.
2765   // call this:  public StackTraceElement[] getStackTrace()
2766   JavaValue result(T_ARRAY);
2767   JavaCalls::call_virtual(&result, throwable,
2768                           vmClasses::Throwable_klass(),
2769                           vmSymbols::getStackTrace_name(),
2770                           vmSymbols::getStackTrace_signature(),
2771                           current);
2772   if (!current->has_pending_exception()){
2773     Handle stack_trace(current, result.get_oop());
2774     assert(stack_trace->is_objArray(), "Should be an array");
2775     java_lang_Throwable::set_stacktrace(init_error(), stack_trace());
2776     // Clear backtrace because the stacktrace should be used instead.
2777     set_backtrace(init_error(), nullptr);
2778   } else {
2779     log_info(class, init)("Exception thrown while getting stack trace for initialization exception %s",
2780                         init_error->klass()->external_name());
2781     current->clear_pending_exception();
2782   }
2783 
2784   return init_error;
2785 }
2786 
2787 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) {
2788   JavaThread* current = JavaThread::current();
2789   objArrayHandle result(current, objArrayOop(backtrace(throwable)));
2790   BacktraceIterator iter(result, current);
2791   // No backtrace available.
2792   if (!iter.repeat()) return false;
2793 
2794   // If the exception happened in a frame that has been hidden, i.e.,
2795   // omitted from the back trace, we can not compute the message.
2796   oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset);
2797   if (hidden != nullptr) {
2798     return false;
2799   }
2800 
2801   // Get first backtrace element.
2802   BacktraceElement bte = iter.next(current);
2803 
2804   InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2805   assert(holder != nullptr, "first element should be non-null");
2806   Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version);
2807 
2808   // Original version is no longer available.
2809   if (m == nullptr || !version_matches(m, bte._version)) {
2810     return false;
2811   }
2812 
2813   *method = m;
2814   *bci = bte._bci;
2815   return true;
2816 }
2817 
2818 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
2819   // Allocate java.lang.StackTraceElement instance
2820   InstanceKlass* k = vmClasses::StackTraceElement_klass();
2821   assert(k != nullptr, "must be loaded in 1.4+");
2822   if (k->should_be_initialized()) {
2823     k->initialize(CHECK_NULL);
2824   }
2825 
2826   Handle element = k->allocate_instance_handle(CHECK_NULL);
2827 
2828   int version = method->constants()->version();
2829   fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_NULL);
2830   return element();
2831 }
2832 
2833 void java_lang_StackTraceElement::fill_in(Handle element,
2834                                           InstanceKlass* holder, const methodHandle& method,
2835                                           int version, int bci, Symbol* name, TRAPS) {
2836   assert(element->is_a(vmClasses::StackTraceElement_klass()), "sanity check");
2837 
2838   ResourceMark rm(THREAD);
2839   HandleMark hm(THREAD);
2840 
2841   // Fill in class name
2842   Handle java_class(THREAD, holder->java_mirror());
2843   oop classname = java_lang_Class::name(java_class, CHECK);
2844   java_lang_StackTraceElement::set_declaringClass(element(), classname);
2845   java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
2846 
2847   oop loader = holder->class_loader();
2848   if (loader != nullptr) {
2849     oop loader_name = java_lang_ClassLoader::name(loader);
2850     if (loader_name != nullptr)
2851       java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
2852   }
2853 
2854   // Fill in method name
2855   oop methodname = StringTable::intern(name, CHECK);
2856   java_lang_StackTraceElement::set_methodName(element(), methodname);
2857 
2858   // Fill in module name and version
2859   ModuleEntry* module = holder->module();
2860   if (module->is_named()) {
2861     oop module_name = StringTable::intern(module->name(), CHECK);
2862     java_lang_StackTraceElement::set_moduleName(element(), module_name);
2863     oop module_version;
2864     if (module->version() != nullptr) {
2865       module_version = StringTable::intern(module->version(), CHECK);
2866     } else {
2867       module_version = nullptr;
2868     }
2869     java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
2870   }
2871 
2872   if (method() == nullptr || !version_matches(method(), version)) {
2873     // The method was redefined, accurate line number information isn't available
2874     java_lang_StackTraceElement::set_fileName(element(), nullptr);
2875     java_lang_StackTraceElement::set_lineNumber(element(), -1);
2876   } else {
2877     Symbol* source;
2878     oop source_file;
2879     int line_number;
2880     decode_file_and_line(java_class, holder, version, method, bci, source, source_file, line_number, CHECK);
2881 
2882     java_lang_StackTraceElement::set_fileName(element(), source_file);
2883     java_lang_StackTraceElement::set_lineNumber(element(), line_number);
2884   }
2885 }
2886 
2887 void java_lang_StackTraceElement::decode_file_and_line(Handle java_class,
2888                                                        InstanceKlass* holder,
2889                                                        int version,
2890                                                        const methodHandle& method,
2891                                                        int bci,
2892                                                        Symbol*& source,
2893                                                        oop& source_file,
2894                                                        int& line_number, TRAPS) {
2895   // Fill in source file name and line number.
2896   source = Backtrace::get_source_file_name(holder, version);
2897   source_file = java_lang_Class::source_file(java_class());
2898   if (source != nullptr) {
2899     // Class was not redefined. We can trust its cache if set,
2900     // else we have to initialize it.
2901     if (source_file == nullptr) {
2902       source_file = StringTable::intern(source, CHECK);
2903       java_lang_Class::set_source_file(java_class(), source_file);
2904     }
2905   } else {
2906     // Class was redefined. Dump the cache if it was set.
2907     if (source_file != nullptr) {
2908       source_file = nullptr;
2909       java_lang_Class::set_source_file(java_class(), source_file);
2910     }
2911   }
2912   line_number = Backtrace::get_line_number(method(), bci);
2913 }
2914 
2915 #if INCLUDE_JVMCI
2916 void java_lang_StackTraceElement::decode(const methodHandle& method, int bci,
2917                                          Symbol*& filename, int& line_number, TRAPS) {
2918   ResourceMark rm(THREAD);
2919   HandleMark hm(THREAD);
2920 
2921   filename = nullptr;
2922   line_number = -1;
2923 
2924   oop source_file;
2925   int version = method->constants()->version();
2926   InstanceKlass* holder = method->method_holder();
2927   Handle java_class(THREAD, holder->java_mirror());
2928   decode_file_and_line(java_class, holder, version, method, bci, filename, source_file, line_number, CHECK);
2929 }
2930 #endif // INCLUDE_JVMCI
2931 
2932 // java_lang_StackFrameInfo
2933 
2934 int java_lang_StackFrameInfo::_memberName_offset;
2935 int java_lang_StackFrameInfo::_bci_offset;
2936 int java_lang_StackFrameInfo::_version_offset;
2937 int java_lang_StackFrameInfo::_contScope_offset;
2938 
2939 #define STACKFRAMEINFO_FIELDS_DO(macro) \
2940   macro(_memberName_offset, k, "memberName", object_signature,            false); \
2941   macro(_bci_offset,        k, "bci",        int_signature,               false); \
2942   macro(_contScope_offset,  k, "contScope",  continuationscope_signature, false)
2943 
2944 void java_lang_StackFrameInfo::compute_offsets() {
2945   InstanceKlass* k = vmClasses::StackFrameInfo_klass();
2946   STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2947   STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2948 }
2949 
2950 #if INCLUDE_CDS
2951 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
2952   STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2953   STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
2954 }
2955 #endif
2956 
2957 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) {
2958   HandleMark hm(THREAD);
2959   Handle mname(THREAD, stackFrame->obj_field(_memberName_offset));
2960   Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname());
2961   // we should expand MemberName::name when Throwable uses StackTrace
2962   // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL);
2963   return method;
2964 }
2965 
2966 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, oop cont, TRAPS) {
2967   // set Method* or mid/cpref
2968   HandleMark hm(THREAD);
2969   Handle mname(THREAD, stackFrame->obj_field(_memberName_offset));
2970   Handle cont_h (THREAD, cont);
2971   InstanceKlass* ik = method->method_holder();
2972   CallInfo info(method(), ik, CHECK);
2973   MethodHandles::init_method_MemberName(mname, info);
2974   // set bci
2975   java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
2976   // method may be redefined; store the version
2977   int version = method->constants()->version();
2978   assert((jushort)version == version, "version should be short");
2979   java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
2980 
2981   oop contScope = cont_h() != nullptr ? jdk_internal_vm_Continuation::scope(cont_h()) : (oop)nullptr;
2982   java_lang_StackFrameInfo::set_contScope(stackFrame(), contScope);
2983 }
2984 
2985 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
2986   ResourceMark rm(THREAD);
2987   HandleMark hm(THREAD);
2988   Handle mname(THREAD, stackFrame->obj_field(java_lang_StackFrameInfo::_memberName_offset));
2989   Klass* clazz = java_lang_Class::as_Klass(java_lang_invoke_MemberName::clazz(mname()));
2990   InstanceKlass* holder = InstanceKlass::cast(clazz);
2991   Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK);
2992 
2993   short version = stackFrame->short_field(_version_offset);
2994   int bci = stackFrame->int_field(_bci_offset);
2995   Symbol* name = method->name();
2996   java_lang_StackTraceElement::fill_in(stack_trace_element, holder, methodHandle(THREAD, method), version, bci, name, CHECK);
2997 }
2998 
2999 void java_lang_StackFrameInfo::set_version(oop element, short value) {
3000   element->short_field_put(_version_offset, value);
3001 }
3002 
3003 void java_lang_StackFrameInfo::set_bci(oop element, int value) {
3004   assert(value >= 0 && value < max_jushort, "must be a valid bci value");
3005   element->int_field_put(_bci_offset, value);
3006 }
3007 
3008 void java_lang_StackFrameInfo::set_contScope(oop element, oop value) {
3009   element->obj_field_put(_contScope_offset, value);
3010 }
3011 
3012 int java_lang_LiveStackFrameInfo::_monitors_offset;
3013 int java_lang_LiveStackFrameInfo::_locals_offset;
3014 int java_lang_LiveStackFrameInfo::_operands_offset;
3015 int java_lang_LiveStackFrameInfo::_mode_offset;
3016 
3017 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
3018   macro(_monitors_offset,   k, "monitors",    object_array_signature, false); \
3019   macro(_locals_offset,     k, "locals",      object_array_signature, false); \
3020   macro(_operands_offset,   k, "operands",    object_array_signature, false); \
3021   macro(_mode_offset,       k, "mode",        int_signature,          false)
3022 
3023 void java_lang_LiveStackFrameInfo::compute_offsets() {
3024   InstanceKlass* k = vmClasses::LiveStackFrameInfo_klass();
3025   LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3026 }
3027 
3028 #if INCLUDE_CDS
3029 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
3030   LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3031 }
3032 #endif
3033 
3034 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) {
3035   element->obj_field_put(_monitors_offset, value);
3036 }
3037 
3038 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) {
3039   element->obj_field_put(_locals_offset, value);
3040 }
3041 
3042 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) {
3043   element->obj_field_put(_operands_offset, value);
3044 }
3045 
3046 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) {
3047   element->int_field_put(_mode_offset, value);
3048 }
3049 
3050 
3051 // java_lang_AccessibleObject
3052 
3053 int java_lang_reflect_AccessibleObject::_override_offset;
3054 
3055 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
3056   macro(_override_offset, k, "override", bool_signature, false)
3057 
3058 void java_lang_reflect_AccessibleObject::compute_offsets() {
3059   InstanceKlass* k = vmClasses::reflect_AccessibleObject_klass();
3060   ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3061 }
3062 
3063 #if INCLUDE_CDS
3064 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
3065   ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3066 }
3067 #endif
3068 
3069 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
3070   return (jboolean) reflect->bool_field(_override_offset);
3071 }
3072 
3073 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
3074   reflect->bool_field_put(_override_offset, (int) value);
3075 }
3076 
3077 // java_lang_reflect_Method
3078 
3079 int java_lang_reflect_Method::_clazz_offset;
3080 int java_lang_reflect_Method::_name_offset;
3081 int java_lang_reflect_Method::_returnType_offset;
3082 int java_lang_reflect_Method::_parameterTypes_offset;
3083 int java_lang_reflect_Method::_exceptionTypes_offset;
3084 int java_lang_reflect_Method::_slot_offset;
3085 int java_lang_reflect_Method::_modifiers_offset;
3086 int java_lang_reflect_Method::_signature_offset;
3087 int java_lang_reflect_Method::_annotations_offset;
3088 int java_lang_reflect_Method::_parameter_annotations_offset;
3089 int java_lang_reflect_Method::_annotation_default_offset;
3090 
3091 #define METHOD_FIELDS_DO(macro) \
3092   macro(_clazz_offset,          k, vmSymbols::clazz_name(),          class_signature,       false); \
3093   macro(_name_offset,           k, vmSymbols::name_name(),           string_signature,      false); \
3094   macro(_returnType_offset,     k, vmSymbols::returnType_name(),     class_signature,       false); \
3095   macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3096   macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3097   macro(_slot_offset,           k, vmSymbols::slot_name(),           int_signature,         false); \
3098   macro(_modifiers_offset,      k, vmSymbols::modifiers_name(),      int_signature,         false); \
3099   macro(_signature_offset,             k, vmSymbols::signature_name(),             string_signature,     false); \
3100   macro(_annotations_offset,           k, vmSymbols::annotations_name(),           byte_array_signature, false); \
3101   macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
3102   macro(_annotation_default_offset,    k, vmSymbols::annotation_default_name(),    byte_array_signature, false);
3103 
3104 void java_lang_reflect_Method::compute_offsets() {
3105   InstanceKlass* k = vmClasses::reflect_Method_klass();
3106   METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3107 }
3108 
3109 #if INCLUDE_CDS
3110 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
3111   METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3112 }
3113 #endif
3114 
3115 Handle java_lang_reflect_Method::create(TRAPS) {
3116   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3117   Klass* klass = vmClasses::reflect_Method_klass();
3118   // This class is eagerly initialized during VM initialization, since we keep a reference
3119   // to one of the methods
3120   assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
3121   return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
3122 }
3123 
3124 oop java_lang_reflect_Method::clazz(oop reflect) {
3125   return reflect->obj_field(_clazz_offset);
3126 }
3127 
3128 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
3129    reflect->obj_field_put(_clazz_offset, value);
3130 }
3131 
3132 int java_lang_reflect_Method::slot(oop reflect) {
3133   return reflect->int_field(_slot_offset);
3134 }
3135 
3136 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
3137   reflect->int_field_put(_slot_offset, value);
3138 }
3139 
3140 void java_lang_reflect_Method::set_name(oop method, oop value) {
3141   method->obj_field_put(_name_offset, value);
3142 }
3143 
3144 oop java_lang_reflect_Method::return_type(oop method) {
3145   return method->obj_field(_returnType_offset);
3146 }
3147 
3148 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
3149   method->obj_field_put(_returnType_offset, value);
3150 }
3151 
3152 oop java_lang_reflect_Method::parameter_types(oop method) {
3153   return method->obj_field(_parameterTypes_offset);
3154 }
3155 
3156 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
3157   method->obj_field_put(_parameterTypes_offset, value);
3158 }
3159 
3160 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
3161   method->obj_field_put(_exceptionTypes_offset, value);
3162 }
3163 
3164 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
3165   method->int_field_put(_modifiers_offset, value);
3166 }
3167 
3168 void java_lang_reflect_Method::set_signature(oop method, oop value) {
3169   method->obj_field_put(_signature_offset, value);
3170 }
3171 
3172 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
3173   method->obj_field_put(_annotations_offset, value);
3174 }
3175 
3176 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
3177   method->obj_field_put(_parameter_annotations_offset, value);
3178 }
3179 
3180 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
3181   method->obj_field_put(_annotation_default_offset, value);
3182 }
3183 
3184 int java_lang_reflect_Constructor::_clazz_offset;
3185 int java_lang_reflect_Constructor::_parameterTypes_offset;
3186 int java_lang_reflect_Constructor::_exceptionTypes_offset;
3187 int java_lang_reflect_Constructor::_slot_offset;
3188 int java_lang_reflect_Constructor::_modifiers_offset;
3189 int java_lang_reflect_Constructor::_signature_offset;
3190 int java_lang_reflect_Constructor::_annotations_offset;
3191 int java_lang_reflect_Constructor::_parameter_annotations_offset;
3192 
3193 #define CONSTRUCTOR_FIELDS_DO(macro) \
3194   macro(_clazz_offset,          k, vmSymbols::clazz_name(),          class_signature,       false); \
3195   macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3196   macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3197   macro(_slot_offset,           k, vmSymbols::slot_name(),           int_signature,         false); \
3198   macro(_modifiers_offset,      k, vmSymbols::modifiers_name(),      int_signature,         false); \
3199   macro(_signature_offset,             k, vmSymbols::signature_name(),             string_signature,     false); \
3200   macro(_annotations_offset,           k, vmSymbols::annotations_name(),           byte_array_signature, false); \
3201   macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
3202 
3203 void java_lang_reflect_Constructor::compute_offsets() {
3204   InstanceKlass* k = vmClasses::reflect_Constructor_klass();
3205   CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3206 }
3207 
3208 #if INCLUDE_CDS
3209 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
3210   CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3211 }
3212 #endif
3213 
3214 Handle java_lang_reflect_Constructor::create(TRAPS) {
3215   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3216   Symbol* name = vmSymbols::java_lang_reflect_Constructor();
3217   Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3218   InstanceKlass* ik = InstanceKlass::cast(k);
3219   // Ensure it is initialized
3220   ik->initialize(CHECK_NH);
3221   return ik->allocate_instance_handle(THREAD);
3222 }
3223 
3224 oop java_lang_reflect_Constructor::clazz(oop reflect) {
3225   return reflect->obj_field(_clazz_offset);
3226 }
3227 
3228 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
3229    reflect->obj_field_put(_clazz_offset, value);
3230 }
3231 
3232 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
3233   return constructor->obj_field(_parameterTypes_offset);
3234 }
3235 
3236 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
3237   constructor->obj_field_put(_parameterTypes_offset, value);
3238 }
3239 
3240 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
3241   constructor->obj_field_put(_exceptionTypes_offset, value);
3242 }
3243 
3244 int java_lang_reflect_Constructor::slot(oop reflect) {
3245   return reflect->int_field(_slot_offset);
3246 }
3247 
3248 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
3249   reflect->int_field_put(_slot_offset, value);
3250 }
3251 
3252 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
3253   constructor->int_field_put(_modifiers_offset, value);
3254 }
3255 
3256 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
3257   constructor->obj_field_put(_signature_offset, value);
3258 }
3259 
3260 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
3261   constructor->obj_field_put(_annotations_offset, value);
3262 }
3263 
3264 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
3265   method->obj_field_put(_parameter_annotations_offset, value);
3266 }
3267 
3268 int java_lang_reflect_Field::_clazz_offset;
3269 int java_lang_reflect_Field::_name_offset;
3270 int java_lang_reflect_Field::_type_offset;
3271 int java_lang_reflect_Field::_slot_offset;
3272 int java_lang_reflect_Field::_modifiers_offset;
3273 int java_lang_reflect_Field::_trusted_final_offset;
3274 int java_lang_reflect_Field::_signature_offset;
3275 int java_lang_reflect_Field::_annotations_offset;
3276 
3277 #define FIELD_FIELDS_DO(macro) \
3278   macro(_clazz_offset,     k, vmSymbols::clazz_name(),     class_signature,  false); \
3279   macro(_name_offset,      k, vmSymbols::name_name(),      string_signature, false); \
3280   macro(_type_offset,      k, vmSymbols::type_name(),      class_signature,  false); \
3281   macro(_slot_offset,      k, vmSymbols::slot_name(),      int_signature,    false); \
3282   macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature,    false); \
3283   macro(_trusted_final_offset,    k, vmSymbols::trusted_final_name(),    bool_signature,       false); \
3284   macro(_signature_offset,        k, vmSymbols::signature_name(),        string_signature,     false); \
3285   macro(_annotations_offset,      k, vmSymbols::annotations_name(),      byte_array_signature, false);
3286 
3287 void java_lang_reflect_Field::compute_offsets() {
3288   InstanceKlass* k = vmClasses::reflect_Field_klass();
3289   FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3290 }
3291 
3292 #if INCLUDE_CDS
3293 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
3294   FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3295 }
3296 #endif
3297 
3298 Handle java_lang_reflect_Field::create(TRAPS) {
3299   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3300   Symbol* name = vmSymbols::java_lang_reflect_Field();
3301   Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3302   InstanceKlass* ik = InstanceKlass::cast(k);
3303   // Ensure it is initialized
3304   ik->initialize(CHECK_NH);
3305   return ik->allocate_instance_handle(THREAD);
3306 }
3307 
3308 oop java_lang_reflect_Field::clazz(oop reflect) {
3309   return reflect->obj_field(_clazz_offset);
3310 }
3311 
3312 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
3313   reflect->obj_field_put(_clazz_offset, value);
3314 }
3315 
3316 oop java_lang_reflect_Field::name(oop field) {
3317   return field->obj_field(_name_offset);
3318 }
3319 
3320 void java_lang_reflect_Field::set_name(oop field, oop value) {
3321   field->obj_field_put(_name_offset, value);
3322 }
3323 
3324 oop java_lang_reflect_Field::type(oop field) {
3325   return field->obj_field(_type_offset);
3326 }
3327 
3328 void java_lang_reflect_Field::set_type(oop field, oop value) {
3329   field->obj_field_put(_type_offset, value);
3330 }
3331 
3332 int java_lang_reflect_Field::slot(oop reflect) {
3333   return reflect->int_field(_slot_offset);
3334 }
3335 
3336 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
3337   reflect->int_field_put(_slot_offset, value);
3338 }
3339 
3340 int java_lang_reflect_Field::modifiers(oop field) {
3341   return field->int_field(_modifiers_offset);
3342 }
3343 
3344 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
3345   field->int_field_put(_modifiers_offset, value);
3346 }
3347 
3348 void java_lang_reflect_Field::set_trusted_final(oop field) {
3349   field->bool_field_put(_trusted_final_offset, true);
3350 }
3351 
3352 void java_lang_reflect_Field::set_signature(oop field, oop value) {
3353   field->obj_field_put(_signature_offset, value);
3354 }
3355 
3356 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
3357   field->obj_field_put(_annotations_offset, value);
3358 }
3359 
3360 oop java_lang_reflect_RecordComponent::create(InstanceKlass* holder, RecordComponent* component, TRAPS) {
3361   // Allocate java.lang.reflect.RecordComponent instance
3362   HandleMark hm(THREAD);
3363   InstanceKlass* ik = vmClasses::RecordComponent_klass();
3364   assert(ik != nullptr, "must be loaded");
3365   ik->initialize(CHECK_NULL);
3366 
3367   Handle element = ik->allocate_instance_handle(CHECK_NULL);
3368 
3369   Handle decl_class(THREAD, holder->java_mirror());
3370   java_lang_reflect_RecordComponent::set_clazz(element(), decl_class());
3371 
3372   Symbol* name = holder->constants()->symbol_at(component->name_index()); // name_index is a utf8
3373   oop component_name = StringTable::intern(name, CHECK_NULL);
3374   java_lang_reflect_RecordComponent::set_name(element(), component_name);
3375 
3376   Symbol* type = holder->constants()->symbol_at(component->descriptor_index());
3377   Handle component_type_h =
3378     SystemDictionary::find_java_mirror_for_type(type, holder, SignatureStream::NCDFError, CHECK_NULL);
3379   java_lang_reflect_RecordComponent::set_type(element(), component_type_h());
3380 
3381   Method* accessor_method = nullptr;
3382   {
3383     // Prepend "()" to type to create the full method signature.
3384     ResourceMark rm(THREAD);
3385     int sig_len = type->utf8_length() + 3; // "()" and null char
3386     char* sig = NEW_RESOURCE_ARRAY(char, sig_len);
3387     jio_snprintf(sig, sig_len, "%c%c%s", JVM_SIGNATURE_FUNC, JVM_SIGNATURE_ENDFUNC, type->as_C_string());
3388     TempNewSymbol full_sig = SymbolTable::new_symbol(sig);
3389     accessor_method = holder->find_instance_method(name, full_sig, Klass::PrivateLookupMode::find);
3390   }
3391 
3392   if (accessor_method != nullptr) {
3393     methodHandle method(THREAD, accessor_method);
3394     oop m = Reflection::new_method(method, false, CHECK_NULL);
3395     java_lang_reflect_RecordComponent::set_accessor(element(), m);
3396   } else {
3397     java_lang_reflect_RecordComponent::set_accessor(element(), nullptr);
3398   }
3399 
3400   int sig_index = component->generic_signature_index();
3401   if (sig_index > 0) {
3402     Symbol* sig = holder->constants()->symbol_at(sig_index); // sig_index is a utf8
3403     oop component_sig = StringTable::intern(sig, CHECK_NULL);
3404     java_lang_reflect_RecordComponent::set_signature(element(), component_sig);
3405   } else {
3406     java_lang_reflect_RecordComponent::set_signature(element(), nullptr);
3407   }
3408 
3409   typeArrayOop annotation_oop = Annotations::make_java_array(component->annotations(), CHECK_NULL);
3410   java_lang_reflect_RecordComponent::set_annotations(element(), annotation_oop);
3411 
3412   typeArrayOop type_annotation_oop = Annotations::make_java_array(component->type_annotations(), CHECK_NULL);
3413   java_lang_reflect_RecordComponent::set_typeAnnotations(element(), type_annotation_oop);
3414 
3415   return element();
3416 }
3417 
3418 int reflect_ConstantPool::_oop_offset;
3419 
3420 #define CONSTANTPOOL_FIELDS_DO(macro) \
3421   macro(_oop_offset, k, "constantPoolOop", object_signature, false)
3422 
3423 void reflect_ConstantPool::compute_offsets() {
3424   InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3425   // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
3426   CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3427 }
3428 
3429 #if INCLUDE_CDS
3430 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3431   CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3432 }
3433 #endif
3434 
3435 int java_lang_reflect_Parameter::_name_offset;
3436 int java_lang_reflect_Parameter::_modifiers_offset;
3437 int java_lang_reflect_Parameter::_index_offset;
3438 int java_lang_reflect_Parameter::_executable_offset;
3439 
3440 #define PARAMETER_FIELDS_DO(macro) \
3441   macro(_name_offset,        k, vmSymbols::name_name(),        string_signature, false); \
3442   macro(_modifiers_offset,   k, vmSymbols::modifiers_name(),   int_signature,    false); \
3443   macro(_index_offset,       k, vmSymbols::index_name(),       int_signature,    false); \
3444   macro(_executable_offset,  k, vmSymbols::executable_name(),  executable_signature, false)
3445 
3446 void java_lang_reflect_Parameter::compute_offsets() {
3447   InstanceKlass* k = vmClasses::reflect_Parameter_klass();
3448   PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3449 }
3450 
3451 #if INCLUDE_CDS
3452 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3453   PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3454 }
3455 #endif
3456 
3457 Handle java_lang_reflect_Parameter::create(TRAPS) {
3458   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3459   Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3460   Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3461   InstanceKlass* ik = InstanceKlass::cast(k);
3462   // Ensure it is initialized
3463   ik->initialize(CHECK_NH);
3464   return ik->allocate_instance_handle(THREAD);
3465 }
3466 
3467 oop java_lang_reflect_Parameter::name(oop param) {
3468   return param->obj_field(_name_offset);
3469 }
3470 
3471 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3472   param->obj_field_put(_name_offset, value);
3473 }
3474 
3475 int java_lang_reflect_Parameter::modifiers(oop param) {
3476   return param->int_field(_modifiers_offset);
3477 }
3478 
3479 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3480   param->int_field_put(_modifiers_offset, value);
3481 }
3482 
3483 int java_lang_reflect_Parameter::index(oop param) {
3484   return param->int_field(_index_offset);
3485 }
3486 
3487 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3488   param->int_field_put(_index_offset, value);
3489 }
3490 
3491 oop java_lang_reflect_Parameter::executable(oop param) {
3492   return param->obj_field(_executable_offset);
3493 }
3494 
3495 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3496   param->obj_field_put(_executable_offset, value);
3497 }
3498 
3499 // java_lang_Module
3500 
3501 int java_lang_Module::_loader_offset;
3502 int java_lang_Module::_name_offset;
3503 int java_lang_Module::_module_entry_offset;
3504 
3505 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3506   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3507   return JavaCalls::construct_new_instance(vmClasses::Module_klass(),
3508                           vmSymbols::java_lang_module_init_signature(),
3509                           loader, module_name, CHECK_NH);
3510 }
3511 
3512 #define MODULE_FIELDS_DO(macro) \
3513   macro(_loader_offset,  k, vmSymbols::loader_name(),  classloader_signature, false); \
3514   macro(_name_offset,    k, vmSymbols::name_name(),    string_signature,      false)
3515 
3516 void java_lang_Module::compute_offsets() {
3517   InstanceKlass* k = vmClasses::Module_klass();
3518   MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3519   MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3520 }
3521 
3522 #if INCLUDE_CDS
3523 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3524   MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3525   MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3526 }
3527 #endif
3528 
3529 oop java_lang_Module::loader(oop module) {
3530   return module->obj_field(_loader_offset);
3531 }
3532 
3533 void java_lang_Module::set_loader(oop module, oop value) {
3534   module->obj_field_put(_loader_offset, value);
3535 }
3536 
3537 oop java_lang_Module::name(oop module) {
3538   return module->obj_field(_name_offset);
3539 }
3540 
3541 void java_lang_Module::set_name(oop module, oop value) {
3542   module->obj_field_put(_name_offset, value);
3543 }
3544 
3545 ModuleEntry* java_lang_Module::module_entry_raw(oop module) {
3546   assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3547   assert(module != nullptr, "module can't be null");
3548   assert(oopDesc::is_oop(module), "module must be oop");
3549 
3550   ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3551   return module_entry;
3552 }
3553 
3554 ModuleEntry* java_lang_Module::module_entry(oop module) {
3555   ModuleEntry* module_entry = module_entry_raw(module);
3556   if (module_entry == nullptr) {
3557     // If the inject field containing the ModuleEntry* is null then return the
3558     // class loader's unnamed module.
3559     oop loader = java_lang_Module::loader(module);
3560     Handle h_loader = Handle(Thread::current(), loader);
3561     ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3562     return loader_cld->unnamed_module();
3563   }
3564   return module_entry;
3565 }
3566 
3567 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3568   assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3569   assert(module != nullptr, "module can't be null");
3570   assert(oopDesc::is_oop(module), "module must be oop");
3571   module->address_field_put(_module_entry_offset, (address)module_entry);
3572 }
3573 
3574 Handle reflect_ConstantPool::create(TRAPS) {
3575   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3576   InstanceKlass* k = vmClasses::reflect_ConstantPool_klass();
3577   // Ensure it is initialized
3578   k->initialize(CHECK_NH);
3579   return k->allocate_instance_handle(THREAD);
3580 }
3581 
3582 
3583 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3584   oop mirror = value->pool_holder()->java_mirror();
3585   // Save the mirror to get back the constant pool.
3586   reflect->obj_field_put(_oop_offset, mirror);
3587 }
3588 
3589 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3590 
3591   oop mirror = reflect->obj_field(_oop_offset);
3592   Klass* k = java_lang_Class::as_Klass(mirror);
3593   assert(k->is_instance_klass(), "Must be");
3594 
3595   // Get the constant pool back from the klass.  Since class redefinition
3596   // merges the new constant pool into the old, this is essentially the
3597   // same constant pool as the original.  If constant pool merging is
3598   // no longer done in the future, this will have to change to save
3599   // the original.
3600   return InstanceKlass::cast(k)->constants();
3601 }
3602 
3603 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
3604 
3605 #define UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(macro) \
3606   macro(_base_offset, k, "base", object_signature, false)
3607 
3608 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
3609   InstanceKlass* k = vmClasses::reflect_UnsafeStaticFieldAccessorImpl_klass();
3610   UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3611 }
3612 
3613 #if INCLUDE_CDS
3614 void reflect_UnsafeStaticFieldAccessorImpl::serialize_offsets(SerializeClosure* f) {
3615   UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3616 }
3617 #endif
3618 
3619 // Support for java_lang_ref_Reference
3620 
3621 bool java_lang_ref_Reference::_offsets_initialized;
3622 
3623 int java_lang_ref_Reference::_referent_offset;
3624 int java_lang_ref_Reference::_queue_offset;
3625 int java_lang_ref_Reference::_next_offset;
3626 int java_lang_ref_Reference::_discovered_offset;
3627 
3628 #define REFERENCE_FIELDS_DO(macro) \
3629   macro(_referent_offset,   k, "referent", object_signature, false); \
3630   macro(_queue_offset,      k, "queue", referencequeue_signature, false); \
3631   macro(_next_offset,       k, "next", reference_signature, false); \
3632   macro(_discovered_offset, k, "discovered", reference_signature, false);
3633 
3634 void java_lang_ref_Reference::compute_offsets() {
3635   if (_offsets_initialized) {
3636     return;
3637   }
3638   _offsets_initialized = true;
3639   InstanceKlass* k = vmClasses::Reference_klass();
3640   REFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3641 }
3642 
3643 #if INCLUDE_CDS
3644 void java_lang_ref_Reference::serialize_offsets(SerializeClosure* f) {
3645   f->do_bool(&_offsets_initialized);
3646   REFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3647 }
3648 #endif
3649 
3650 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
3651   assert(obj != nullptr, "sanity");
3652   if (offset != _referent_offset) {
3653     return false;
3654   }
3655 
3656   Klass* k = obj->klass();
3657   if (!k->is_instance_klass()) {
3658     return false;
3659   }
3660 
3661   InstanceKlass* ik = InstanceKlass::cast(obj->klass());
3662   bool is_reference = ik->reference_type() != REF_NONE;
3663   assert(!is_reference || ik->is_subclass_of(vmClasses::Reference_klass()), "sanity");
3664   return is_reference;
3665 }
3666 
3667 int java_lang_boxing_object::_value_offset;
3668 int java_lang_boxing_object::_long_value_offset;
3669 
3670 #define BOXING_FIELDS_DO(macro) \
3671   macro(_value_offset,      integerKlass, "value", int_signature, false); \
3672   macro(_long_value_offset, longKlass, "value", long_signature, false);
3673 
3674 void java_lang_boxing_object::compute_offsets() {
3675   InstanceKlass* integerKlass = vmClasses::Integer_klass();
3676   InstanceKlass* longKlass = vmClasses::Long_klass();
3677   BOXING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3678 }
3679 
3680 #if INCLUDE_CDS
3681 void java_lang_boxing_object::serialize_offsets(SerializeClosure* f) {
3682   BOXING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3683 }
3684 #endif
3685 
3686 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
3687   Klass* k = vmClasses::box_klass(type);
3688   if (k == nullptr)  return nullptr;
3689   InstanceKlass* ik = InstanceKlass::cast(k);
3690   if (!ik->is_initialized()) {
3691     ik->initialize(CHECK_NULL);
3692   }
3693   return ik->allocate_instance(THREAD);
3694 }
3695 
3696 
3697 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
3698   oop box = initialize_and_allocate(type, CHECK_NULL);
3699   if (box == nullptr)  return nullptr;
3700   switch (type) {
3701     case T_BOOLEAN:
3702       box->bool_field_put(_value_offset, value->z);
3703       break;
3704     case T_CHAR:
3705       box->char_field_put(_value_offset, value->c);
3706       break;
3707     case T_FLOAT:
3708       box->float_field_put(_value_offset, value->f);
3709       break;
3710     case T_DOUBLE:
3711       box->double_field_put(_long_value_offset, value->d);
3712       break;
3713     case T_BYTE:
3714       box->byte_field_put(_value_offset, value->b);
3715       break;
3716     case T_SHORT:
3717       box->short_field_put(_value_offset, value->s);
3718       break;
3719     case T_INT:
3720       box->int_field_put(_value_offset, value->i);
3721       break;
3722     case T_LONG:
3723       box->long_field_put(_long_value_offset, value->j);
3724       break;
3725     default:
3726       return nullptr;
3727   }
3728   return box;
3729 }
3730 
3731 
3732 BasicType java_lang_boxing_object::basic_type(oop box) {
3733   if (box == nullptr)  return T_ILLEGAL;
3734   BasicType type = vmClasses::box_klass_type(box->klass());
3735   if (type == T_OBJECT)         // 'unknown' value returned by SD::bkt
3736     return T_ILLEGAL;
3737   return type;
3738 }
3739 
3740 
3741 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
3742   BasicType type = vmClasses::box_klass_type(box->klass());
3743   switch (type) {
3744   case T_BOOLEAN:
3745     value->z = box->bool_field(_value_offset);
3746     break;
3747   case T_CHAR:
3748     value->c = box->char_field(_value_offset);
3749     break;
3750   case T_FLOAT:
3751     value->f = box->float_field(_value_offset);
3752     break;
3753   case T_DOUBLE:
3754     value->d = box->double_field(_long_value_offset);
3755     break;
3756   case T_BYTE:
3757     value->b = box->byte_field(_value_offset);
3758     break;
3759   case T_SHORT:
3760     value->s = box->short_field(_value_offset);
3761     break;
3762   case T_INT:
3763     value->i = box->int_field(_value_offset);
3764     break;
3765   case T_LONG:
3766     value->j = box->long_field(_long_value_offset);
3767     break;
3768   default:
3769     return T_ILLEGAL;
3770   } // end switch
3771   return type;
3772 }
3773 
3774 
3775 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
3776   BasicType type = vmClasses::box_klass_type(box->klass());
3777   switch (type) {
3778   case T_BOOLEAN:
3779     box->bool_field_put(_value_offset, value->z);
3780     break;
3781   case T_CHAR:
3782     box->char_field_put(_value_offset, value->c);
3783     break;
3784   case T_FLOAT:
3785     box->float_field_put(_value_offset, value->f);
3786     break;
3787   case T_DOUBLE:
3788     box->double_field_put(_long_value_offset, value->d);
3789     break;
3790   case T_BYTE:
3791     box->byte_field_put(_value_offset, value->b);
3792     break;
3793   case T_SHORT:
3794     box->short_field_put(_value_offset, value->s);
3795     break;
3796   case T_INT:
3797     box->int_field_put(_value_offset, value->i);
3798     break;
3799   case T_LONG:
3800     box->long_field_put(_long_value_offset, value->j);
3801     break;
3802   default:
3803     return T_ILLEGAL;
3804   } // end switch
3805   return type;
3806 }
3807 
3808 
3809 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
3810   switch (type) {
3811   case T_BOOLEAN:   st->print("%s", value->z ? "true" : "false");   break;
3812   case T_CHAR:      st->print("%d", value->c);                      break;
3813   case T_BYTE:      st->print("%d", value->b);                      break;
3814   case T_SHORT:     st->print("%d", value->s);                      break;
3815   case T_INT:       st->print("%d", value->i);                      break;
3816   case T_LONG:      st->print(JLONG_FORMAT, value->j);              break;
3817   case T_FLOAT:     st->print("%f", value->f);                      break;
3818   case T_DOUBLE:    st->print("%lf", value->d);                     break;
3819   default:          st->print("type %d?", type);                    break;
3820   }
3821 }
3822 
3823 
3824 // Support for java_lang_ref_SoftReference
3825 //
3826 
3827 int java_lang_ref_SoftReference::_timestamp_offset;
3828 int java_lang_ref_SoftReference::_static_clock_offset;
3829 
3830 #define SOFTREFERENCE_FIELDS_DO(macro) \
3831   macro(_timestamp_offset,    k, "timestamp", long_signature, false); \
3832   macro(_static_clock_offset, k, "clock",     long_signature, true)
3833 
3834 void java_lang_ref_SoftReference::compute_offsets() {
3835   InstanceKlass* k = vmClasses::SoftReference_klass();
3836   SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3837 }
3838 
3839 #if INCLUDE_CDS
3840 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
3841   SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3842 }
3843 #endif
3844 
3845 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
3846   return ref->long_field(_timestamp_offset);
3847 }
3848 
3849 jlong java_lang_ref_SoftReference::clock() {
3850   InstanceKlass* ik = vmClasses::SoftReference_klass();
3851   oop base = ik->static_field_base_raw();
3852   return base->long_field(_static_clock_offset);
3853 }
3854 
3855 void java_lang_ref_SoftReference::set_clock(jlong value) {
3856   InstanceKlass* ik = vmClasses::SoftReference_klass();
3857   oop base = ik->static_field_base_raw();
3858   base->long_field_put(_static_clock_offset, value);
3859 }
3860 
3861 // Support for java_lang_invoke_DirectMethodHandle
3862 
3863 int java_lang_invoke_DirectMethodHandle::_member_offset;
3864 
3865 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
3866   oop member_name = nullptr;
3867   assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
3868          "a DirectMethodHandle oop is expected");
3869   return dmh->obj_field(_member_offset);
3870 }
3871 
3872 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
3873   macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
3874 
3875 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
3876   InstanceKlass* k = vmClasses::DirectMethodHandle_klass();
3877   DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3878 }
3879 
3880 #if INCLUDE_CDS
3881 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
3882   DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3883 }
3884 #endif
3885 
3886 // Support for java_lang_invoke_MethodHandle
3887 
3888 int java_lang_invoke_MethodHandle::_type_offset;
3889 int java_lang_invoke_MethodHandle::_form_offset;
3890 
3891 int java_lang_invoke_MemberName::_clazz_offset;
3892 int java_lang_invoke_MemberName::_name_offset;
3893 int java_lang_invoke_MemberName::_type_offset;
3894 int java_lang_invoke_MemberName::_flags_offset;
3895 int java_lang_invoke_MemberName::_method_offset;
3896 int java_lang_invoke_MemberName::_vmindex_offset;
3897 
3898 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
3899 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
3900 
3901 int java_lang_invoke_LambdaForm::_vmentry_offset;
3902 
3903 #define METHODHANDLE_FIELDS_DO(macro) \
3904   macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
3905   macro(_form_offset, k, "form",                 java_lang_invoke_LambdaForm_signature, false)
3906 
3907 void java_lang_invoke_MethodHandle::compute_offsets() {
3908   InstanceKlass* k = vmClasses::MethodHandle_klass();
3909   METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3910 }
3911 
3912 #if INCLUDE_CDS
3913 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
3914   METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3915 }
3916 #endif
3917 
3918 #define MEMBERNAME_FIELDS_DO(macro) \
3919   macro(_clazz_offset,   k, vmSymbols::clazz_name(),   class_signature,  false); \
3920   macro(_name_offset,    k, vmSymbols::name_name(),    string_signature, false); \
3921   macro(_type_offset,    k, vmSymbols::type_name(),    object_signature, false); \
3922   macro(_flags_offset,   k, vmSymbols::flags_name(),   int_signature,    false); \
3923   macro(_method_offset,  k, vmSymbols::method_name(),  java_lang_invoke_ResolvedMethodName_signature, false)
3924 
3925 void java_lang_invoke_MemberName::compute_offsets() {
3926   InstanceKlass* k = vmClasses::MemberName_klass();
3927   MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3928   MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3929 }
3930 
3931 #if INCLUDE_CDS
3932 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
3933   MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3934   MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3935 }
3936 #endif
3937 
3938 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
3939   InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
3940   assert(k != nullptr, "jdk mismatch");
3941   RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3942 }
3943 
3944 #if INCLUDE_CDS
3945 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
3946   RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3947 }
3948 #endif
3949 
3950 #define LAMBDAFORM_FIELDS_DO(macro) \
3951   macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
3952 
3953 void java_lang_invoke_LambdaForm::compute_offsets() {
3954   InstanceKlass* k = vmClasses::LambdaForm_klass();
3955   assert (k != nullptr, "jdk mismatch");
3956   LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3957 }
3958 
3959 #if INCLUDE_CDS
3960 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
3961   LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3962 }
3963 #endif
3964 
3965 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
3966   return obj != nullptr && is_subclass(obj->klass());
3967 }
3968 
3969 int jdk_internal_foreign_abi_NativeEntryPoint::_method_type_offset;
3970 int jdk_internal_foreign_abi_NativeEntryPoint::_downcall_stub_address_offset;
3971 
3972 #define NEP_FIELDS_DO(macro) \
3973   macro(_method_type_offset,           k, "methodType",          java_lang_invoke_MethodType_signature, false); \
3974   macro(_downcall_stub_address_offset, k, "downcallStubAddress", long_signature, false);
3975 
3976 bool jdk_internal_foreign_abi_NativeEntryPoint::is_instance(oop obj) {
3977   return obj != nullptr && is_subclass(obj->klass());
3978 }
3979 
3980 void jdk_internal_foreign_abi_NativeEntryPoint::compute_offsets() {
3981   InstanceKlass* k = vmClasses::NativeEntryPoint_klass();
3982   NEP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3983 }
3984 
3985 #if INCLUDE_CDS
3986 void jdk_internal_foreign_abi_NativeEntryPoint::serialize_offsets(SerializeClosure* f) {
3987   NEP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3988 }
3989 #endif
3990 
3991 oop jdk_internal_foreign_abi_NativeEntryPoint::method_type(oop entry) {
3992   return entry->obj_field(_method_type_offset);
3993 }
3994 
3995 jlong jdk_internal_foreign_abi_NativeEntryPoint::downcall_stub_address(oop entry) {
3996   return entry->long_field(_downcall_stub_address_offset);
3997 }
3998 
3999 int jdk_internal_foreign_abi_ABIDescriptor::_inputStorage_offset;
4000 int jdk_internal_foreign_abi_ABIDescriptor::_outputStorage_offset;
4001 int jdk_internal_foreign_abi_ABIDescriptor::_volatileStorage_offset;
4002 int jdk_internal_foreign_abi_ABIDescriptor::_stackAlignment_offset;
4003 int jdk_internal_foreign_abi_ABIDescriptor::_shadowSpace_offset;
4004 int jdk_internal_foreign_abi_ABIDescriptor::_scratch1_offset;
4005 int jdk_internal_foreign_abi_ABIDescriptor::_scratch2_offset;
4006 
4007 #define ABIDescriptor_FIELDS_DO(macro) \
4008   macro(_inputStorage_offset,    k, "inputStorage",    jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4009   macro(_outputStorage_offset,   k, "outputStorage",   jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4010   macro(_volatileStorage_offset, k, "volatileStorage", jdk_internal_foreign_abi_VMStorage_array_array_signature, false); \
4011   macro(_stackAlignment_offset,  k, "stackAlignment",  int_signature, false); \
4012   macro(_shadowSpace_offset,     k, "shadowSpace",     int_signature, false); \
4013   macro(_scratch1_offset,        k, "scratch1",        jdk_internal_foreign_abi_VMStorage_signature, false); \
4014   macro(_scratch2_offset,        k, "scratch2",        jdk_internal_foreign_abi_VMStorage_signature, false);
4015 
4016 bool jdk_internal_foreign_abi_ABIDescriptor::is_instance(oop obj) {
4017   return obj != nullptr && is_subclass(obj->klass());
4018 }
4019 
4020 void jdk_internal_foreign_abi_ABIDescriptor::compute_offsets() {
4021   InstanceKlass* k = vmClasses::ABIDescriptor_klass();
4022   ABIDescriptor_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4023 }
4024 
4025 #if INCLUDE_CDS
4026 void jdk_internal_foreign_abi_ABIDescriptor::serialize_offsets(SerializeClosure* f) {
4027   ABIDescriptor_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4028 }
4029 #endif
4030 
4031 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::inputStorage(oop entry) {
4032   return oop_cast<objArrayOop>(entry->obj_field(_inputStorage_offset));
4033 }
4034 
4035 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::outputStorage(oop entry) {
4036   return oop_cast<objArrayOop>(entry->obj_field(_outputStorage_offset));
4037 }
4038 
4039 objArrayOop jdk_internal_foreign_abi_ABIDescriptor::volatileStorage(oop entry) {
4040   return oop_cast<objArrayOop>(entry->obj_field(_volatileStorage_offset));
4041 }
4042 
4043 jint jdk_internal_foreign_abi_ABIDescriptor::stackAlignment(oop entry) {
4044   return entry->int_field(_stackAlignment_offset);
4045 }
4046 
4047 jint jdk_internal_foreign_abi_ABIDescriptor::shadowSpace(oop entry) {
4048   return entry->int_field(_shadowSpace_offset);
4049 }
4050 
4051 oop jdk_internal_foreign_abi_ABIDescriptor::scratch1(oop entry) {
4052   return entry->obj_field(_scratch1_offset);
4053 }
4054 
4055 oop jdk_internal_foreign_abi_ABIDescriptor::scratch2(oop entry) {
4056   return entry->obj_field(_scratch2_offset);
4057 }
4058 
4059 int jdk_internal_foreign_abi_VMStorage::_type_offset;
4060 int jdk_internal_foreign_abi_VMStorage::_indexOrOffset_offset;
4061 int jdk_internal_foreign_abi_VMStorage::_segmentMaskOrSize_offset;
4062 int jdk_internal_foreign_abi_VMStorage::_debugName_offset;
4063 
4064 #define VMStorage_FIELDS_DO(macro) \
4065   macro(_type_offset,              k, "type",              byte_signature, false); \
4066   macro(_indexOrOffset_offset,     k, "indexOrOffset",     int_signature, false); \
4067   macro(_segmentMaskOrSize_offset, k, "segmentMaskOrSize", short_signature, false); \
4068   macro(_debugName_offset,         k, "debugName",         string_signature, false); \
4069 
4070 bool jdk_internal_foreign_abi_VMStorage::is_instance(oop obj) {
4071   return obj != nullptr && is_subclass(obj->klass());
4072 }
4073 
4074 void jdk_internal_foreign_abi_VMStorage::compute_offsets() {
4075   InstanceKlass* k = vmClasses::VMStorage_klass();
4076   VMStorage_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4077 }
4078 
4079 #if INCLUDE_CDS
4080 void jdk_internal_foreign_abi_VMStorage::serialize_offsets(SerializeClosure* f) {
4081   VMStorage_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4082 }
4083 #endif
4084 
4085 jbyte jdk_internal_foreign_abi_VMStorage::type(oop entry) {
4086   return entry->byte_field(_type_offset);
4087 }
4088 
4089 jint jdk_internal_foreign_abi_VMStorage::index_or_offset(oop entry) {
4090   return entry->int_field(_indexOrOffset_offset);
4091 }
4092 
4093 jshort jdk_internal_foreign_abi_VMStorage::segment_mask_or_size(oop entry) {
4094   return entry->short_field(_segmentMaskOrSize_offset);
4095 }
4096 
4097 oop jdk_internal_foreign_abi_VMStorage::debugName(oop entry) {
4098   return entry->obj_field(_debugName_offset);
4099 }
4100 
4101 int jdk_internal_foreign_abi_CallConv::_argRegs_offset;
4102 int jdk_internal_foreign_abi_CallConv::_retRegs_offset;
4103 
4104 #define CallConv_FIELDS_DO(macro) \
4105   macro(_argRegs_offset, k, "argRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4106   macro(_retRegs_offset, k, "retRegs", jdk_internal_foreign_abi_VMStorage_array_signature, false); \
4107 
4108 bool jdk_internal_foreign_abi_CallConv::is_instance(oop obj) {
4109   return obj != nullptr && is_subclass(obj->klass());
4110 }
4111 
4112 void jdk_internal_foreign_abi_CallConv::compute_offsets() {
4113   InstanceKlass* k = vmClasses::CallConv_klass();
4114   CallConv_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4115 }
4116 
4117 #if INCLUDE_CDS
4118 void jdk_internal_foreign_abi_CallConv::serialize_offsets(SerializeClosure* f) {
4119   CallConv_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4120 }
4121 #endif
4122 
4123 objArrayOop jdk_internal_foreign_abi_CallConv::argRegs(oop entry) {
4124   return oop_cast<objArrayOop>(entry->obj_field(_argRegs_offset));
4125 }
4126 
4127 objArrayOop jdk_internal_foreign_abi_CallConv::retRegs(oop entry) {
4128   return oop_cast<objArrayOop>(entry->obj_field(_retRegs_offset));
4129 }
4130 
4131 oop java_lang_invoke_MethodHandle::type(oop mh) {
4132   return mh->obj_field(_type_offset);
4133 }
4134 
4135 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
4136   mh->obj_field_put(_type_offset, mtype);
4137 }
4138 
4139 oop java_lang_invoke_MethodHandle::form(oop mh) {
4140   assert(_form_offset != 0, "");
4141   return mh->obj_field(_form_offset);
4142 }
4143 
4144 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
4145   assert(_form_offset != 0, "");
4146   mh->obj_field_put(_form_offset, lform);
4147 }
4148 
4149 /// MemberName accessors
4150 
4151 oop java_lang_invoke_MemberName::clazz(oop mname) {
4152   assert(is_instance(mname), "wrong type");
4153   return mname->obj_field(_clazz_offset);
4154 }
4155 
4156 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
4157   assert(is_instance(mname), "wrong type");
4158   mname->obj_field_put(_clazz_offset, clazz);
4159 }
4160 
4161 oop java_lang_invoke_MemberName::name(oop mname) {
4162   assert(is_instance(mname), "wrong type");
4163   return mname->obj_field(_name_offset);
4164 }
4165 
4166 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
4167   assert(is_instance(mname), "wrong type");
4168   mname->obj_field_put(_name_offset, name);
4169 }
4170 
4171 oop java_lang_invoke_MemberName::type(oop mname) {
4172   assert(is_instance(mname), "wrong type");
4173   return mname->obj_field(_type_offset);
4174 }
4175 
4176 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
4177   assert(is_instance(mname), "wrong type");
4178   mname->obj_field_put(_type_offset, type);
4179 }
4180 
4181 int java_lang_invoke_MemberName::flags(oop mname) {
4182   assert(is_instance(mname), "wrong type");
4183   return mname->int_field(_flags_offset);
4184 }
4185 
4186 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
4187   assert(is_instance(mname), "wrong type");
4188   mname->int_field_put(_flags_offset, flags);
4189 }
4190 
4191 
4192 // Return vmtarget from ResolvedMethodName method field through indirection
4193 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
4194   assert(is_instance(mname), "wrong type");
4195   oop method = mname->obj_field(_method_offset);
4196   return method == nullptr ? nullptr : java_lang_invoke_ResolvedMethodName::vmtarget(method);
4197 }
4198 
4199 bool java_lang_invoke_MemberName::is_method(oop mname) {
4200   assert(is_instance(mname), "must be MemberName");
4201   return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
4202 }
4203 
4204 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
4205   assert(is_instance(mname), "wrong type");
4206   mname->obj_field_put(_method_offset, resolved_method);
4207 }
4208 
4209 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
4210   assert(is_instance(mname), "wrong type");
4211   return (intptr_t) mname->address_field(_vmindex_offset);
4212 }
4213 
4214 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
4215   assert(is_instance(mname), "wrong type");
4216   mname->address_field_put(_vmindex_offset, (address) index);
4217 }
4218 
4219 
4220 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
4221   assert(is_instance(resolved_method), "wrong type");
4222   Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
4223   assert(m->is_method(), "must be");
4224   return m;
4225 }
4226 
4227 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
4228 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
4229   assert(is_instance(resolved_method), "wrong type");
4230   resolved_method->address_field_put(_vmtarget_offset, (address)m);
4231 }
4232 
4233 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) {
4234   assert(is_instance(resolved_method), "wrong type");
4235   resolved_method->obj_field_put(_vmholder_offset, holder);
4236 }
4237 
4238 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
4239   const Method* method = m();
4240 
4241   // lookup ResolvedMethod oop in the table, or create a new one and intern it
4242   oop resolved_method = ResolvedMethodTable::find_method(method);
4243   if (resolved_method != nullptr) {
4244     return resolved_method;
4245   }
4246 
4247   InstanceKlass* k = vmClasses::ResolvedMethodName_klass();
4248   if (!k->is_initialized()) {
4249     k->initialize(CHECK_NULL);
4250   }
4251 
4252   oop new_resolved_method = k->allocate_instance(CHECK_NULL);
4253 
4254   NoSafepointVerifier nsv;
4255 
4256   if (method->is_old()) {
4257     method = (method->is_deleted()) ? Universe::throw_no_such_method_error() :
4258                                       method->get_new_method();
4259   }
4260 
4261   InstanceKlass* holder = method->method_holder();
4262 
4263   set_vmtarget(new_resolved_method, const_cast<Method*>(method));
4264   // Add a reference to the loader (actually mirror because hidden classes may not have
4265   // distinct loaders) to ensure the metadata is kept alive.
4266   // This mirror may be different than the one in clazz field.
4267   set_vmholder(new_resolved_method, holder->java_mirror());
4268 
4269   // Set flag in class to indicate this InstanceKlass has entries in the table
4270   // to avoid walking table during redefinition if none of the redefined classes
4271   // have any membernames in the table.
4272   holder->set_has_resolved_methods();
4273 
4274   return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method));
4275 }
4276 
4277 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
4278   assert(is_instance(lform), "wrong type");
4279   return lform->obj_field(_vmentry_offset);
4280 }
4281 
4282 
4283 // Support for java_lang_invoke_MethodType
4284 
4285 int java_lang_invoke_MethodType::_rtype_offset;
4286 int java_lang_invoke_MethodType::_ptypes_offset;
4287 
4288 #define METHODTYPE_FIELDS_DO(macro) \
4289   macro(_rtype_offset,  k, "rtype",  class_signature,       false); \
4290   macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
4291 
4292 void java_lang_invoke_MethodType::compute_offsets() {
4293   InstanceKlass* k = vmClasses::MethodType_klass();
4294   METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4295 }
4296 
4297 #if INCLUDE_CDS
4298 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
4299   METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4300 }
4301 #endif
4302 
4303 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
4304   st->print("(");
4305   objArrayOop pts = ptypes(mt);
4306   if (pts != nullptr) {
4307     for (int i = 0, limit = pts->length(); i < limit; i++) {
4308       java_lang_Class::print_signature(pts->obj_at(i), st);
4309     }
4310   } else {
4311     st->print("null");
4312   }
4313   st->print(")");
4314   oop rt = rtype(mt);
4315   if (rt != nullptr) {
4316     java_lang_Class::print_signature(rt, st);
4317   } else {
4318     st->print("null");
4319   }
4320 }
4321 
4322 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) {
4323   ResourceMark rm;
4324   stringStream buffer(128);
4325   print_signature(mt, &buffer);
4326   const char* sigstr =       buffer.base();
4327   int         siglen = (int) buffer.size();
4328   Symbol *name;
4329   if (!intern_if_not_found) {
4330     name = SymbolTable::probe(sigstr, siglen);
4331   } else {
4332     name = SymbolTable::new_symbol(sigstr, siglen);
4333   }
4334   return name;
4335 }
4336 
4337 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
4338   if (mt1 == mt2)
4339     return true;
4340   if (rtype(mt1) != rtype(mt2))
4341     return false;
4342   if (ptype_count(mt1) != ptype_count(mt2))
4343     return false;
4344   for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
4345     if (ptype(mt1, i) != ptype(mt2, i))
4346       return false;
4347   }
4348   return true;
4349 }
4350 
4351 oop java_lang_invoke_MethodType::rtype(oop mt) {
4352   assert(is_instance(mt), "must be a MethodType");
4353   return mt->obj_field(_rtype_offset);
4354 }
4355 
4356 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
4357   assert(is_instance(mt), "must be a MethodType");
4358   return (objArrayOop) mt->obj_field(_ptypes_offset);
4359 }
4360 
4361 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
4362   return ptypes(mt)->obj_at(idx);
4363 }
4364 
4365 int java_lang_invoke_MethodType::ptype_count(oop mt) {
4366   return ptypes(mt)->length();
4367 }
4368 
4369 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
4370   objArrayOop pts = ptypes(mt);
4371   int count = pts->length();
4372   int slots = 0;
4373   for (int i = 0; i < count; i++) {
4374     BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
4375     slots += type2size[bt];
4376   }
4377   return slots;
4378 }
4379 
4380 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
4381   BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
4382   return type2size[bt];
4383 }
4384 
4385 
4386 // Support for java_lang_invoke_CallSite
4387 
4388 int java_lang_invoke_CallSite::_target_offset;
4389 int java_lang_invoke_CallSite::_context_offset;
4390 
4391 #define CALLSITE_FIELDS_DO(macro) \
4392   macro(_target_offset,  k, "target", java_lang_invoke_MethodHandle_signature, false); \
4393   macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false)
4394 
4395 void java_lang_invoke_CallSite::compute_offsets() {
4396   InstanceKlass* k = vmClasses::CallSite_klass();
4397   CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4398 }
4399 
4400 #if INCLUDE_CDS
4401 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
4402   CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4403 }
4404 #endif
4405 
4406 oop java_lang_invoke_CallSite::context_no_keepalive(oop call_site) {
4407   assert(java_lang_invoke_CallSite::is_instance(call_site), "");
4408 
4409   oop dep_oop = call_site->obj_field_access<AS_NO_KEEPALIVE>(_context_offset);
4410   return dep_oop;
4411 }
4412 
4413 // Support for java_lang_invoke_ConstantCallSite
4414 
4415 int java_lang_invoke_ConstantCallSite::_is_frozen_offset;
4416 
4417 #define CONSTANTCALLSITE_FIELDS_DO(macro) \
4418   macro(_is_frozen_offset, k, "isFrozen", bool_signature, false)
4419 
4420 void java_lang_invoke_ConstantCallSite::compute_offsets() {
4421   InstanceKlass* k = vmClasses::ConstantCallSite_klass();
4422   CONSTANTCALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4423 }
4424 
4425 #if INCLUDE_CDS
4426 void java_lang_invoke_ConstantCallSite::serialize_offsets(SerializeClosure* f) {
4427   CONSTANTCALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4428 }
4429 #endif
4430 
4431 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext
4432 
4433 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset;
4434 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_last_cleanup_offset;
4435 
4436 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() {
4437   InstanceKlass* k = vmClasses::Context_klass();
4438   CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4439 }
4440 
4441 #if INCLUDE_CDS
4442 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) {
4443   CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4444 }
4445 #endif
4446 
4447 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) {
4448   assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
4449   nmethodBucket* volatile* vmdeps_addr = call_site->field_addr<nmethodBucket* volatile>(_vmdependencies_offset);
4450   volatile uint64_t* last_cleanup_addr = call_site->field_addr<volatile uint64_t>(_last_cleanup_offset);
4451   DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr);
4452   return dep_ctx;
4453 }
4454 
4455 // Support for java_security_AccessControlContext
4456 
4457 int java_security_AccessControlContext::_context_offset;
4458 int java_security_AccessControlContext::_privilegedContext_offset;
4459 int java_security_AccessControlContext::_isPrivileged_offset;
4460 int java_security_AccessControlContext::_isAuthorized_offset;
4461 
4462 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \
4463   macro(_context_offset,           k, "context",      protectiondomain_signature, false); \
4464   macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \
4465   macro(_isPrivileged_offset,      k, "isPrivileged", bool_signature, false); \
4466   macro(_isAuthorized_offset,      k, "isAuthorized", bool_signature, false)
4467 
4468 void java_security_AccessControlContext::compute_offsets() {
4469   assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
4470   InstanceKlass* k = vmClasses::AccessControlContext_klass();
4471   ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4472 }
4473 
4474 #if INCLUDE_CDS
4475 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) {
4476   ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4477 }
4478 #endif
4479 
4480 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
4481   assert(_isPrivileged_offset != 0, "offsets should have been initialized");
4482   assert(_isAuthorized_offset != 0, "offsets should have been initialized");
4483   // Ensure klass is initialized
4484   vmClasses::AccessControlContext_klass()->initialize(CHECK_NULL);
4485   // Allocate result
4486   oop result = vmClasses::AccessControlContext_klass()->allocate_instance(CHECK_NULL);
4487   // Fill in values
4488   result->obj_field_put(_context_offset, context());
4489   result->obj_field_put(_privilegedContext_offset, privileged_context());
4490   result->bool_field_put(_isPrivileged_offset, isPrivileged);
4491   result->bool_field_put(_isAuthorized_offset, true);
4492   return result;
4493 }
4494 
4495 
4496 // Support for java_lang_ClassLoader
4497 
4498 int  java_lang_ClassLoader::_loader_data_offset;
4499 int  java_lang_ClassLoader::_parallelCapable_offset;
4500 int  java_lang_ClassLoader::_name_offset;
4501 int  java_lang_ClassLoader::_nameAndId_offset;
4502 int  java_lang_ClassLoader::_unnamedModule_offset;
4503 int  java_lang_ClassLoader::_parent_offset;
4504 
4505 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
4506   assert(loader != nullptr, "loader must not be null");
4507   assert(oopDesc::is_oop(loader), "loader must be oop");
4508   return Atomic::load_acquire(loader->field_addr<ClassLoaderData*>(_loader_data_offset));
4509 }
4510 
4511 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
4512   assert(loader != nullptr, "loader must not be null");
4513   assert(oopDesc::is_oop(loader), "loader must be oop");
4514   return *loader->field_addr<ClassLoaderData*>(_loader_data_offset);
4515 }
4516 
4517 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
4518   assert(loader != nullptr, "loader must not be null");
4519   assert(oopDesc::is_oop(loader), "loader must be oop");
4520   Atomic::release_store(loader->field_addr<ClassLoaderData*>(_loader_data_offset), new_data);
4521 }
4522 
4523 #define CLASSLOADER_FIELDS_DO(macro) \
4524   macro(_parallelCapable_offset, k1, "parallelLockMap",      concurrenthashmap_signature, false); \
4525   macro(_name_offset,            k1, vmSymbols::name_name(), string_signature, false); \
4526   macro(_nameAndId_offset,       k1, "nameAndId",            string_signature, false); \
4527   macro(_unnamedModule_offset,   k1, "unnamedModule",        module_signature, false); \
4528   macro(_parent_offset,          k1, "parent",               classloader_signature, false)
4529 
4530 void java_lang_ClassLoader::compute_offsets() {
4531   InstanceKlass* k1 = vmClasses::ClassLoader_klass();
4532   CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4533 
4534   CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4535 }
4536 
4537 #if INCLUDE_CDS
4538 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
4539   CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4540   CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4541 }
4542 #endif
4543 
4544 oop java_lang_ClassLoader::parent(oop loader) {
4545   assert(is_instance(loader), "loader must be oop");
4546   return loader->obj_field(_parent_offset);
4547 }
4548 
4549 oop java_lang_ClassLoader::parent_no_keepalive(oop loader) {
4550   assert(is_instance(loader), "loader must be oop");
4551   return loader->obj_field_access<AS_NO_KEEPALIVE>(_parent_offset);
4552 }
4553 
4554 // Returns the name field of this class loader.  If the name field has not
4555 // been set, null will be returned.
4556 oop java_lang_ClassLoader::name(oop loader) {
4557   assert(is_instance(loader), "loader must be oop");
4558   return loader->obj_field(_name_offset);
4559 }
4560 
4561 // Returns the nameAndId field of this class loader. The format is
4562 // as follows:
4563 //   If the defining loader has a name explicitly set then '<loader-name>' @<id>
4564 //   If the defining loader has no name then <qualified-class-name> @<id>
4565 //   If built-in loader, then omit '@<id>' as there is only one instance.
4566 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
4567 oop java_lang_ClassLoader::nameAndId(oop loader) {
4568   assert(is_instance(loader), "loader must be oop");
4569   return loader->obj_field(_nameAndId_offset);
4570 }
4571 
4572 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
4573   assert(is_instance(loader), "loader must be oop");
4574   assert(cl == nullptr || is_instance(cl), "cl argument must be oop");
4575   oop acl = loader;
4576   debug_only(jint loop_count = 0);
4577   // This loop taken verbatim from ClassLoader.java:
4578   do {
4579     acl = parent(acl);
4580     if (cl == acl) {
4581       return true;
4582     }
4583     assert(++loop_count > 0, "loop_count overflow");
4584   } while (acl != nullptr);
4585   return false;
4586 }
4587 
4588 bool java_lang_ClassLoader::is_instance(oop obj) {
4589   return obj != nullptr && is_subclass(obj->klass());
4590 }
4591 
4592 
4593 // For class loader classes, parallelCapable defined
4594 // based on non-null field
4595 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
4596 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
4597   assert(_parallelCapable_offset != 0, "offsets should have been initialized");
4598   return (class_loader->obj_field(_parallelCapable_offset) != nullptr);
4599 }
4600 
4601 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
4602   // Fix for 4474172; see evaluation for more details
4603   loader = non_reflection_class_loader(loader);
4604 
4605   oop cl = SystemDictionary::java_system_loader();
4606   while(cl != nullptr) {
4607     if (cl == loader) return true;
4608     cl = parent(cl);
4609   }
4610   return false;
4611 }
4612 
4613 // Return true if this is one of the class loaders associated with
4614 // the generated bytecodes for reflection.
4615 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) {
4616   if (loader != nullptr) {
4617     Klass* delegating_cl_class = vmClasses::reflect_DelegatingClassLoader_klass();
4618     // This might be null in non-1.4 JDKs
4619     return (delegating_cl_class != nullptr && loader->is_a(delegating_cl_class));
4620   }
4621   return false;
4622 }
4623 
4624 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
4625   // See whether this is one of the class loaders associated with
4626   // the generated bytecodes for reflection, and if so, "magically"
4627   // delegate to its parent to prevent class loading from occurring
4628   // in places where applications using reflection didn't expect it.
4629   if (is_reflection_class_loader(loader)) {
4630     return parent(loader);
4631   }
4632   return loader;
4633 }
4634 
4635 oop java_lang_ClassLoader::unnamedModule(oop loader) {
4636   assert(is_instance(loader), "loader must be oop");
4637   return loader->obj_field(_unnamedModule_offset);
4638 }
4639 
4640 // Support for java_lang_System
4641 //
4642 
4643 int java_lang_System::_static_in_offset;
4644 int java_lang_System::_static_out_offset;
4645 int java_lang_System::_static_err_offset;
4646 int java_lang_System::_static_security_offset;
4647 int java_lang_System::_static_allow_security_offset;
4648 int java_lang_System::_static_never_offset;
4649 
4650 #define SYSTEM_FIELDS_DO(macro) \
4651   macro(_static_in_offset,  k, "in",  input_stream_signature, true); \
4652   macro(_static_out_offset, k, "out", print_stream_signature, true); \
4653   macro(_static_err_offset, k, "err", print_stream_signature, true); \
4654   macro(_static_security_offset, k, "security", security_manager_signature, true); \
4655   macro(_static_allow_security_offset, k, "allowSecurityManager", int_signature, true); \
4656   macro(_static_never_offset, k, "NEVER", int_signature, true)
4657 
4658 void java_lang_System::compute_offsets() {
4659   InstanceKlass* k = vmClasses::System_klass();
4660   SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4661 }
4662 
4663 // This field tells us that a security manager can never be installed so we
4664 // can completely skip populating the ProtectionDomainCacheTable.
4665 bool java_lang_System::allow_security_manager() {
4666   static int initialized = false;
4667   static bool allowed = true; // default
4668   if (!initialized) {
4669     oop base = vmClasses::System_klass()->static_field_base_raw();
4670     int never = base->int_field(_static_never_offset);
4671     allowed = (base->int_field(_static_allow_security_offset) != never);
4672     initialized = true;
4673   }
4674   return allowed;
4675 }
4676 
4677 // This field tells us that a security manager is installed.
4678 bool java_lang_System::has_security_manager() {
4679   oop base = vmClasses::System_klass()->static_field_base_raw();
4680   return base->obj_field(_static_security_offset) != nullptr;
4681 }
4682 
4683 #if INCLUDE_CDS
4684 void java_lang_System::serialize_offsets(SerializeClosure* f) {
4685    SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4686 }
4687 #endif
4688 
4689 // Support for jdk_internal_misc_UnsafeConstants
4690 //
4691 class UnsafeConstantsFixup : public FieldClosure {
4692 private:
4693   int _address_size;
4694   int _page_size;
4695   bool _big_endian;
4696   bool _use_unaligned_access;
4697   int _data_cache_line_flush_size;
4698 public:
4699   UnsafeConstantsFixup() {
4700     // round up values for all static final fields
4701     _address_size = sizeof(void*);
4702     _page_size = (int)os::vm_page_size();
4703     _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true);
4704     _use_unaligned_access = UseUnalignedAccesses;
4705     _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size();
4706   }
4707 
4708   void do_field(fieldDescriptor* fd) {
4709     oop mirror = fd->field_holder()->java_mirror();
4710     assert(mirror != nullptr, "UnsafeConstants must have mirror already");
4711     assert(fd->field_holder() == vmClasses::UnsafeConstants_klass(), "Should be UnsafeConstants");
4712     assert(fd->is_final(), "fields of UnsafeConstants must be final");
4713     assert(fd->is_static(), "fields of UnsafeConstants must be static");
4714     if (fd->name() == vmSymbols::address_size_name()) {
4715       mirror->int_field_put(fd->offset(), _address_size);
4716     } else if (fd->name() == vmSymbols::page_size_name()) {
4717       mirror->int_field_put(fd->offset(), _page_size);
4718     } else if (fd->name() == vmSymbols::big_endian_name()) {
4719       mirror->bool_field_put(fd->offset(), _big_endian);
4720     } else if (fd->name() == vmSymbols::use_unaligned_access_name()) {
4721       mirror->bool_field_put(fd->offset(), _use_unaligned_access);
4722     } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) {
4723       mirror->int_field_put(fd->offset(), _data_cache_line_flush_size);
4724     } else {
4725       assert(false, "unexpected UnsafeConstants field");
4726     }
4727   }
4728 };
4729 
4730 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() {
4731   UnsafeConstantsFixup fixup;
4732   vmClasses::UnsafeConstants_klass()->do_local_static_fields(&fixup);
4733 }
4734 
4735 
4736 // java_lang_StackTraceElement
4737 
4738 int java_lang_StackTraceElement::_methodName_offset;
4739 int java_lang_StackTraceElement::_fileName_offset;
4740 int java_lang_StackTraceElement::_lineNumber_offset;
4741 int java_lang_StackTraceElement::_moduleName_offset;
4742 int java_lang_StackTraceElement::_moduleVersion_offset;
4743 int java_lang_StackTraceElement::_classLoaderName_offset;
4744 int java_lang_StackTraceElement::_declaringClass_offset;
4745 int java_lang_StackTraceElement::_declaringClassObject_offset;
4746 
4747 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4748   macro(_declaringClassObject_offset,  k, "declaringClassObject", class_signature, false); \
4749   macro(_classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4750   macro(_moduleName_offset,      k, "moduleName",      string_signature, false); \
4751   macro(_moduleVersion_offset,   k, "moduleVersion",   string_signature, false); \
4752   macro(_declaringClass_offset,  k, "declaringClass",  string_signature, false); \
4753   macro(_methodName_offset,      k, "methodName",      string_signature, false); \
4754   macro(_fileName_offset,        k, "fileName",        string_signature, false); \
4755   macro(_lineNumber_offset,      k, "lineNumber",      int_signature,    false)
4756 
4757 // Support for java_lang_StackTraceElement
4758 void java_lang_StackTraceElement::compute_offsets() {
4759   InstanceKlass* k = vmClasses::StackTraceElement_klass();
4760   STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4761 }
4762 
4763 #if INCLUDE_CDS
4764 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
4765   STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4766 }
4767 #endif
4768 
4769 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
4770   element->obj_field_put(_fileName_offset, value);
4771 }
4772 
4773 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
4774   element->obj_field_put(_declaringClass_offset, value);
4775 }
4776 
4777 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
4778   element->obj_field_put(_methodName_offset, value);
4779 }
4780 
4781 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
4782   element->int_field_put(_lineNumber_offset, value);
4783 }
4784 
4785 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
4786   element->obj_field_put(_moduleName_offset, value);
4787 }
4788 
4789 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
4790   element->obj_field_put(_moduleVersion_offset, value);
4791 }
4792 
4793 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
4794   element->obj_field_put(_classLoaderName_offset, value);
4795 }
4796 
4797 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
4798   element->obj_field_put(_declaringClassObject_offset, value);
4799 }
4800 
4801 
4802 // java_lang_AssertionStatusDirectives
4803 
4804 int java_lang_AssertionStatusDirectives::_classes_offset;
4805 int java_lang_AssertionStatusDirectives::_classEnabled_offset;
4806 int java_lang_AssertionStatusDirectives::_packages_offset;
4807 int java_lang_AssertionStatusDirectives::_packageEnabled_offset;
4808 int java_lang_AssertionStatusDirectives::_deflt_offset;
4809 
4810 // Support for java Assertions - java_lang_AssertionStatusDirectives.
4811 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
4812   macro(_classes_offset,        k, "classes",        string_array_signature, false); \
4813   macro(_classEnabled_offset,   k, "classEnabled",   bool_array_signature, false); \
4814   macro(_packages_offset,       k, "packages",       string_array_signature, false); \
4815   macro(_packageEnabled_offset, k, "packageEnabled", bool_array_signature,   false); \
4816   macro(_deflt_offset,          k, "deflt",          bool_signature,         false)
4817 
4818 void java_lang_AssertionStatusDirectives::compute_offsets() {
4819   InstanceKlass* k = vmClasses::AssertionStatusDirectives_klass();
4820   ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4821 }
4822 
4823 #if INCLUDE_CDS
4824 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
4825   ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4826 }
4827 #endif
4828 
4829 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
4830   o->obj_field_put(_classes_offset, val);
4831 }
4832 
4833 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
4834   o->obj_field_put(_classEnabled_offset, val);
4835 }
4836 
4837 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
4838   o->obj_field_put(_packages_offset, val);
4839 }
4840 
4841 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
4842   o->obj_field_put(_packageEnabled_offset, val);
4843 }
4844 
4845 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
4846   o->bool_field_put(_deflt_offset, val);
4847 }
4848 
4849 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
4850 
4851 #define AOS_FIELDS_DO(macro) \
4852   macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
4853 
4854 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
4855   InstanceKlass* k = vmClasses::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
4856   AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4857 }
4858 
4859 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
4860   assert(_owner_offset != 0, "Must be initialized");
4861   return obj->obj_field(_owner_offset);
4862 }
4863 
4864 #if INCLUDE_CDS
4865 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
4866   AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4867 }
4868 #endif
4869 
4870 int vector_VectorPayload::_payload_offset;
4871 
4872 #define VECTORPAYLOAD_FIELDS_DO(macro) \
4873   macro(_payload_offset, k, "payload", object_signature, false)
4874 
4875 void vector_VectorPayload::compute_offsets() {
4876   InstanceKlass* k = vmClasses::vector_VectorPayload_klass();
4877   VECTORPAYLOAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4878 }
4879 
4880 #if INCLUDE_CDS
4881 void vector_VectorPayload::serialize_offsets(SerializeClosure* f) {
4882   VECTORPAYLOAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4883 }
4884 #endif
4885 
4886 void vector_VectorPayload::set_payload(oop o, oop val) {
4887   o->obj_field_put(_payload_offset, val);
4888 }
4889 
4890 bool vector_VectorPayload::is_instance(oop obj) {
4891   return obj != nullptr && is_subclass(obj->klass());
4892 }
4893 
4894 int java_lang_Integer_IntegerCache::_static_cache_offset;
4895 int java_lang_Long_LongCache::_static_cache_offset;
4896 int java_lang_Character_CharacterCache::_static_cache_offset;
4897 int java_lang_Short_ShortCache::_static_cache_offset;
4898 int java_lang_Byte_ByteCache::_static_cache_offset;
4899 
4900 #define INTEGER_CACHE_FIELDS_DO(macro) \
4901   macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true)
4902 
4903 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) {
4904   guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
4905   INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4906 }
4907 
4908 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) {
4909   oop base = ik->static_field_base_raw();
4910   return objArrayOop(base->obj_field(_static_cache_offset));
4911 }
4912 
4913 Symbol* java_lang_Integer_IntegerCache::symbol() {
4914   return vmSymbols::java_lang_Integer_IntegerCache();
4915 }
4916 
4917 #if INCLUDE_CDS
4918 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) {
4919   INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4920 }
4921 #endif
4922 #undef INTEGER_CACHE_FIELDS_DO
4923 
4924 jint java_lang_Integer::value(oop obj) {
4925    jvalue v;
4926    java_lang_boxing_object::get_value(obj, &v);
4927    return v.i;
4928 }
4929 
4930 #define LONG_CACHE_FIELDS_DO(macro) \
4931   macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true)
4932 
4933 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) {
4934   guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
4935   LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4936 }
4937 
4938 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) {
4939   oop base = ik->static_field_base_raw();
4940   return objArrayOop(base->obj_field(_static_cache_offset));
4941 }
4942 
4943 Symbol* java_lang_Long_LongCache::symbol() {
4944   return vmSymbols::java_lang_Long_LongCache();
4945 }
4946 
4947 #if INCLUDE_CDS
4948 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) {
4949   LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4950 }
4951 #endif
4952 #undef LONG_CACHE_FIELDS_DO
4953 
4954 jlong java_lang_Long::value(oop obj) {
4955    jvalue v;
4956    java_lang_boxing_object::get_value(obj, &v);
4957    return v.j;
4958 }
4959 
4960 #define CHARACTER_CACHE_FIELDS_DO(macro) \
4961   macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true)
4962 
4963 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) {
4964   guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
4965   CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4966 }
4967 
4968 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) {
4969   oop base = ik->static_field_base_raw();
4970   return objArrayOop(base->obj_field(_static_cache_offset));
4971 }
4972 
4973 Symbol* java_lang_Character_CharacterCache::symbol() {
4974   return vmSymbols::java_lang_Character_CharacterCache();
4975 }
4976 
4977 #if INCLUDE_CDS
4978 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) {
4979   CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4980 }
4981 #endif
4982 #undef CHARACTER_CACHE_FIELDS_DO
4983 
4984 jchar java_lang_Character::value(oop obj) {
4985    jvalue v;
4986    java_lang_boxing_object::get_value(obj, &v);
4987    return v.c;
4988 }
4989 
4990 #define SHORT_CACHE_FIELDS_DO(macro) \
4991   macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true)
4992 
4993 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) {
4994   guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
4995   SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4996 }
4997 
4998 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) {
4999   oop base = ik->static_field_base_raw();
5000   return objArrayOop(base->obj_field(_static_cache_offset));
5001 }
5002 
5003 Symbol* java_lang_Short_ShortCache::symbol() {
5004   return vmSymbols::java_lang_Short_ShortCache();
5005 }
5006 
5007 #if INCLUDE_CDS
5008 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) {
5009   SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5010 }
5011 #endif
5012 #undef SHORT_CACHE_FIELDS_DO
5013 
5014 jshort java_lang_Short::value(oop obj) {
5015    jvalue v;
5016    java_lang_boxing_object::get_value(obj, &v);
5017    return v.s;
5018 }
5019 
5020 #define BYTE_CACHE_FIELDS_DO(macro) \
5021   macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true)
5022 
5023 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) {
5024   guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5025   BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5026 }
5027 
5028 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) {
5029   oop base = ik->static_field_base_raw();
5030   return objArrayOop(base->obj_field(_static_cache_offset));
5031 }
5032 
5033 Symbol* java_lang_Byte_ByteCache::symbol() {
5034   return vmSymbols::java_lang_Byte_ByteCache();
5035 }
5036 
5037 #if INCLUDE_CDS
5038 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) {
5039   BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5040 }
5041 #endif
5042 #undef BYTE_CACHE_FIELDS_DO
5043 
5044 jbyte java_lang_Byte::value(oop obj) {
5045    jvalue v;
5046    java_lang_boxing_object::get_value(obj, &v);
5047    return v.b;
5048 }
5049 
5050 int java_lang_Boolean::_static_TRUE_offset;
5051 int java_lang_Boolean::_static_FALSE_offset;
5052 
5053 #define BOOLEAN_FIELDS_DO(macro) \
5054   macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \
5055   macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true)
5056 
5057 
5058 void java_lang_Boolean::compute_offsets(InstanceKlass *k) {
5059   guarantee(k != nullptr && k->is_initialized(), "must be loaded and initialized");
5060   BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5061 }
5062 
5063 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) {
5064   oop base = ik->static_field_base_raw();
5065   return base->obj_field(_static_TRUE_offset);
5066 }
5067 
5068 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) {
5069   oop base = ik->static_field_base_raw();
5070   return base->obj_field(_static_FALSE_offset);
5071 }
5072 
5073 Symbol* java_lang_Boolean::symbol() {
5074   return vmSymbols::java_lang_Boolean();
5075 }
5076 
5077 #if INCLUDE_CDS
5078 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) {
5079   BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5080 }
5081 #endif
5082 #undef BOOLEAN_CACHE_FIELDS_DO
5083 
5084 jboolean java_lang_Boolean::value(oop obj) {
5085    jvalue v;
5086    java_lang_boxing_object::get_value(obj, &v);
5087    return v.z;
5088 }
5089 
5090 // java_lang_reflect_RecordComponent
5091 
5092 int java_lang_reflect_RecordComponent::_clazz_offset;
5093 int java_lang_reflect_RecordComponent::_name_offset;
5094 int java_lang_reflect_RecordComponent::_type_offset;
5095 int java_lang_reflect_RecordComponent::_accessor_offset;
5096 int java_lang_reflect_RecordComponent::_signature_offset;
5097 int java_lang_reflect_RecordComponent::_annotations_offset;
5098 int java_lang_reflect_RecordComponent::_typeAnnotations_offset;
5099 
5100 #define RECORDCOMPONENT_FIELDS_DO(macro) \
5101   macro(_clazz_offset,       k, "clazz",       class_signature,  false); \
5102   macro(_name_offset,        k, "name",        string_signature, false); \
5103   macro(_type_offset,        k, "type",        class_signature,  false); \
5104   macro(_accessor_offset,    k, "accessor",    reflect_method_signature, false); \
5105   macro(_signature_offset,   k, "signature",   string_signature, false); \
5106   macro(_annotations_offset, k, "annotations", byte_array_signature,     false); \
5107   macro(_typeAnnotations_offset, k, "typeAnnotations", byte_array_signature, false);
5108 
5109 // Support for java_lang_reflect_RecordComponent
5110 void java_lang_reflect_RecordComponent::compute_offsets() {
5111   InstanceKlass* k = vmClasses::RecordComponent_klass();
5112   RECORDCOMPONENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
5113 }
5114 
5115 #if INCLUDE_CDS
5116 void java_lang_reflect_RecordComponent::serialize_offsets(SerializeClosure* f) {
5117   RECORDCOMPONENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
5118 }
5119 #endif
5120 
5121 void java_lang_reflect_RecordComponent::set_clazz(oop element, oop value) {
5122   element->obj_field_put(_clazz_offset, value);
5123 }
5124 
5125 void java_lang_reflect_RecordComponent::set_name(oop element, oop value) {
5126   element->obj_field_put(_name_offset, value);
5127 }
5128 
5129 void java_lang_reflect_RecordComponent::set_type(oop element, oop value) {
5130   element->obj_field_put(_type_offset, value);
5131 }
5132 
5133 void java_lang_reflect_RecordComponent::set_accessor(oop element, oop value) {
5134   element->obj_field_put(_accessor_offset, value);
5135 }
5136 
5137 void java_lang_reflect_RecordComponent::set_signature(oop element, oop value) {
5138   element->obj_field_put(_signature_offset, value);
5139 }
5140 
5141 void java_lang_reflect_RecordComponent::set_annotations(oop element, oop value) {
5142   element->obj_field_put(_annotations_offset, value);
5143 }
5144 
5145 void java_lang_reflect_RecordComponent::set_typeAnnotations(oop element, oop value) {
5146   element->obj_field_put(_typeAnnotations_offset, value);
5147 }
5148 
5149 // java_lang_InternalError
5150 int java_lang_InternalError::_during_unsafe_access_offset;
5151 
5152 void java_lang_InternalError::set_during_unsafe_access(oop internal_error) {
5153   internal_error->bool_field_put(_during_unsafe_access_offset, true);
5154 }
5155 
5156 jboolean java_lang_InternalError::during_unsafe_access(oop internal_error) {
5157   return internal_error->bool_field(_during_unsafe_access_offset);
5158 }
5159 
5160 void java_lang_InternalError::compute_offsets() {
5161   INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
5162 }
5163 
5164 #if INCLUDE_CDS
5165 void java_lang_InternalError::serialize_offsets(SerializeClosure* f) {
5166   INTERNALERROR_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
5167 }
5168 #endif
5169 
5170 #define BASIC_JAVA_CLASSES_DO_PART1(f) \
5171   f(java_lang_Class) \
5172   f(java_lang_String) \
5173   f(java_lang_ref_Reference) \
5174   //end
5175 
5176 #define BASIC_JAVA_CLASSES_DO_PART2(f) \
5177   f(java_lang_System) \
5178   f(java_lang_ClassLoader) \
5179   f(java_lang_Throwable) \
5180   f(java_lang_Thread) \
5181   f(java_lang_Thread_FieldHolder) \
5182   f(java_lang_Thread_Constants) \
5183   f(java_lang_ThreadGroup) \
5184   f(java_lang_VirtualThread) \
5185   f(java_lang_InternalError) \
5186   f(java_lang_AssertionStatusDirectives) \
5187   f(java_lang_ref_SoftReference) \
5188   f(java_lang_invoke_MethodHandle) \
5189   f(java_lang_invoke_DirectMethodHandle) \
5190   f(java_lang_invoke_MemberName) \
5191   f(java_lang_invoke_ResolvedMethodName) \
5192   f(java_lang_invoke_LambdaForm) \
5193   f(java_lang_invoke_MethodType) \
5194   f(java_lang_invoke_CallSite) \
5195   f(java_lang_invoke_ConstantCallSite) \
5196   f(java_lang_invoke_MethodHandleNatives_CallSiteContext) \
5197   f(java_security_AccessControlContext) \
5198   f(java_lang_reflect_AccessibleObject) \
5199   f(java_lang_reflect_Method) \
5200   f(java_lang_reflect_Constructor) \
5201   f(java_lang_reflect_Field) \
5202   f(java_lang_reflect_RecordComponent) \
5203   f(reflect_ConstantPool) \
5204   f(reflect_UnsafeStaticFieldAccessorImpl) \
5205   f(java_lang_reflect_Parameter) \
5206   f(java_lang_Module) \
5207   f(java_lang_StackTraceElement) \
5208   f(java_lang_StackFrameInfo) \
5209   f(java_lang_LiveStackFrameInfo) \
5210   f(jdk_internal_vm_ContinuationScope) \
5211   f(jdk_internal_vm_Continuation) \
5212   f(jdk_internal_vm_StackChunk) \
5213   f(java_util_concurrent_locks_AbstractOwnableSynchronizer) \
5214   f(jdk_internal_foreign_abi_NativeEntryPoint) \
5215   f(jdk_internal_foreign_abi_ABIDescriptor) \
5216   f(jdk_internal_foreign_abi_VMStorage) \
5217   f(jdk_internal_foreign_abi_CallConv) \
5218   f(jdk_internal_misc_UnsafeConstants) \
5219   f(java_lang_boxing_object) \
5220   f(vector_VectorPayload) \
5221   //end
5222 
5223 #define BASIC_JAVA_CLASSES_DO(f) \
5224         BASIC_JAVA_CLASSES_DO_PART1(f) \
5225         BASIC_JAVA_CLASSES_DO_PART2(f)
5226 
5227 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
5228 
5229 // Compute field offsets of all the classes in this file
5230 void JavaClasses::compute_offsets() {
5231   if (UseSharedSpaces) {
5232     JVMTI_ONLY(assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
5233                                                          JvmtiExport::has_early_class_hook_env()),
5234                       "JavaClasses::compute_offsets() must be called in early JVMTI phase."));
5235     // None of the classes used by the rest of this function can be replaced by
5236     // JVMTI ClassFileLoadHook.
5237     // We are safe to use the archived offsets, which have already been restored
5238     // by JavaClasses::serialize_offsets, without computing the offsets again.
5239     return;
5240   }
5241 
5242   // We have already called the compute_offsets() of the
5243   // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String, java_lang_Class and
5244   // java_lang_ref_Reference) earlier inside vmClasses::resolve_all()
5245   BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
5246 }
5247 
5248 #if INCLUDE_CDS
5249 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
5250 
5251 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
5252   BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
5253 }
5254 #endif
5255 
5256 #if INCLUDE_CDS_JAVA_HEAP
5257 bool JavaClasses::is_supported_for_archiving(oop obj) {
5258   Klass* klass = obj->klass();
5259 
5260   if (klass == vmClasses::ClassLoader_klass() ||  // ClassLoader::loader_data is malloc'ed.
5261       // The next 3 classes are used to implement java.lang.invoke, and are not used directly in
5262       // regular Java code. The implementation of java.lang.invoke uses generated hidden classes
5263       // (e.g., as referenced by ResolvedMethodName::vmholder) that are not yet supported by CDS.
5264       // So for now we cannot not support these classes for archiving.
5265       //
5266       // These objects typically are not referenced by static fields, but rather by resolved
5267       // constant pool entries, so excluding them shouldn't affect the archiving of static fields.
5268       klass == vmClasses::ResolvedMethodName_klass() ||
5269       klass == vmClasses::MemberName_klass() ||
5270       klass == vmClasses::Context_klass() ||
5271       // It's problematic to archive Reference objects. One of the reasons is that
5272       // Reference::discovered may pull in unwanted objects (see JDK-8284336)
5273       klass->is_subclass_of(vmClasses::Reference_klass())) {
5274     return false;
5275   }
5276 
5277   return true;
5278 }
5279 #endif
5280 
5281 #ifndef PRODUCT
5282 
5283 // These functions exist to assert the validity of de-serialized offsets in boxing object as a sanity check.
5284 
5285 bool JavaClasses::check_offset(const char *klass_name, int deserialized_offset, const char *field_name,
5286                                const char* field_sig) {
5287   EXCEPTION_MARK;
5288   fieldDescriptor fd;
5289   TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name);
5290   Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
5291   InstanceKlass* ik = InstanceKlass::cast(k);
5292   TempNewSymbol f_name = SymbolTable::new_symbol(field_name);
5293   TempNewSymbol f_sig  = SymbolTable::new_symbol(field_sig);
5294   if (!ik->find_local_field(f_name, f_sig, &fd)) {
5295     tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
5296     return false;
5297   }
5298   if (fd.is_static()) {
5299     tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
5300     return false;
5301   }
5302   if (fd.offset() == deserialized_offset ) {
5303     return true;
5304   } else {
5305     tty->print_cr("Offset of nonstatic field %s.%s is deserialized as %d but should really be %d.",
5306                   klass_name, field_name, deserialized_offset, fd.offset());
5307     return false;
5308   }
5309 }
5310 
5311 void JavaClasses::check_offsets() {
5312   bool valid = true;
5313 
5314 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5315   valid &= check_offset(klass_name, cpp_klass_name :: _##field_name ## _offset, #field_name, field_sig)
5316 
5317 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
5318   valid &= check_offset(klass_name, cpp_klass_name :: _##long_ ## field_name ## _offset, #field_name, field_sig)
5319 
5320   // Boxed primitive objects (java_lang_boxing_object)
5321 
5322   CHECK_OFFSET("java/lang/Boolean",   java_lang_boxing_object, value, "Z");
5323   CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
5324   CHECK_OFFSET("java/lang/Float",     java_lang_boxing_object, value, "F");
5325   CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
5326   CHECK_OFFSET("java/lang/Byte",      java_lang_boxing_object, value, "B");
5327   CHECK_OFFSET("java/lang/Short",     java_lang_boxing_object, value, "S");
5328   CHECK_OFFSET("java/lang/Integer",   java_lang_boxing_object, value, "I");
5329   CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
5330 
5331   if (!valid) vm_exit_during_initialization("Field offset verification failed");
5332 }
5333 
5334 #endif // PRODUCT
5335 
5336 int InjectedField::compute_offset() {
5337   InstanceKlass* ik = InstanceKlass::cast(klass());
5338   for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5339     if (!may_be_java && !fs.field_flags().is_injected()) {
5340       // Only look at injected fields
5341       continue;
5342     }
5343     if (fs.name() == name() && fs.signature() == signature()) {
5344       return fs.offset();
5345     }
5346   }
5347   ResourceMark rm;
5348   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)" : "");
5349 #ifndef PRODUCT
5350   ik->print();
5351   tty->print_cr("all fields:");
5352   for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
5353     tty->print_cr("  name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
5354   }
5355 #endif //PRODUCT
5356   vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
5357   return -1;
5358 }
5359 
5360 void javaClasses_init() {
5361   JavaClasses::compute_offsets();
5362   JavaClasses::check_offsets();
5363   FilteredFieldsMap::initialize();  // must be done after computing offsets.
5364 }