1 /*
   2  * Copyright (c) 1997, 2020, 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 "classfile/altHashing.hpp"
  27 #include "classfile/classLoaderData.inline.hpp"
  28 #include "classfile/javaClasses.inline.hpp"
  29 #include "classfile/moduleEntry.hpp"
  30 #include "classfile/stringTable.hpp"
  31 #include "classfile/symbolTable.hpp"
  32 #include "classfile/vmSymbols.hpp"
  33 #include "code/debugInfo.hpp"
  34 #include "code/dependencyContext.hpp"
  35 #include "code/pcDesc.hpp"
  36 #include "interpreter/interpreter.hpp"
  37 #include "interpreter/linkResolver.hpp"
  38 #include "logging/log.hpp"
  39 #include "logging/logStream.hpp"
  40 #include "memory/heapShared.inline.hpp"
  41 #include "memory/metaspaceShared.hpp"
  42 #include "memory/oopFactory.hpp"
  43 #include "memory/resourceArea.hpp"
  44 #include "memory/universe.hpp"
  45 #include "oops/fieldStreams.inline.hpp"
  46 #include "oops/instanceKlass.hpp"
  47 #include "oops/instanceMirrorKlass.hpp"
  48 #include "oops/klass.hpp"
  49 #include "oops/method.inline.hpp"
  50 #include "oops/objArrayOop.inline.hpp"
  51 #include "oops/oop.inline.hpp"
  52 #include "oops/symbol.hpp"
  53 #include "oops/recordComponent.hpp"
  54 #include "oops/typeArrayOop.inline.hpp"
  55 #include "prims/jvmtiExport.hpp"
  56 #include "prims/resolvedMethodTable.hpp"
  57 #include "runtime/fieldDescriptor.inline.hpp"
  58 #include "runtime/frame.inline.hpp"
  59 #include "runtime/handles.inline.hpp"
  60 #include "runtime/init.hpp"
  61 #include "runtime/interfaceSupport.inline.hpp"
  62 #include "runtime/java.hpp"
  63 #include "runtime/javaCalls.hpp"
  64 #include "runtime/jniHandles.inline.hpp"
  65 #include "runtime/safepoint.hpp"
  66 #include "runtime/safepointVerifiers.hpp"
  67 #include "runtime/thread.inline.hpp"
  68 #include "runtime/vframe.inline.hpp"
  69 #include "runtime/vm_version.hpp"
  70 #include "utilities/align.hpp"
  71 #include "utilities/preserveException.hpp"
  72 #include "utilities/utf8.hpp"
  73 #if INCLUDE_JVMCI
  74 #include "jvmci/jvmciJavaClasses.hpp"
  75 #endif
  76 
  77 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java)    \
  78   klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum);
  79 
  80 #if INCLUDE_CDS
  81 #define INJECTED_FIELD_SERIALIZE_OFFSET(klass, name, signature, may_be_java) \
  82   f->do_u4((u4*)&_##name##_offset);
  83 #endif
  84 
  85 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java)           \
  86   { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java },
  87 
  88 InjectedField JavaClasses::_injected_fields[] = {
  89   ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
  90 };
  91 
  92 // Register native methods of Object
  93 void java_lang_Object::register_natives(TRAPS) {
  94   InstanceKlass* obj = SystemDictionary::Object_klass();
  95   Method::register_native(obj, vmSymbols::hashCode_name(),
  96                           vmSymbols::void_int_signature(), (address) &JVM_IHashCode, CHECK);
  97   Method::register_native(obj, vmSymbols::wait_name(),
  98                           vmSymbols::long_void_signature(), (address) &JVM_MonitorWait, CHECK);
  99   Method::register_native(obj, vmSymbols::notify_name(),
 100                           vmSymbols::void_method_signature(), (address) &JVM_MonitorNotify, CHECK);
 101   Method::register_native(obj, vmSymbols::notifyAll_name(),
 102                           vmSymbols::void_method_signature(), (address) &JVM_MonitorNotifyAll, CHECK);
 103   Method::register_native(obj, vmSymbols::clone_name(),
 104                           vmSymbols::void_object_signature(), (address) &JVM_Clone, THREAD);
 105 }
 106 
 107 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
 108   return _injected_fields[id].compute_offset();
 109 }
 110 
 111 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
 112   *field_count = 0;
 113 
 114   vmSymbols::SID sid = vmSymbols::find_sid(class_name);
 115   if (sid == vmSymbols::NO_SID) {
 116     // Only well known classes can inject fields
 117     return NULL;
 118   }
 119 
 120   int count = 0;
 121   int start = -1;
 122 
 123 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
 124   if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) {              \
 125     count++;                                                       \
 126     if (start == -1) start = klass##_##name##_enum;                \
 127   }
 128   ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
 129 #undef LOOKUP_INJECTED_FIELD
 130 
 131   if (start != -1) {
 132     *field_count = count;
 133     return _injected_fields + start;
 134   }
 135   return NULL;
 136 }
 137 
 138 
 139 // Helpful routine for computing field offsets at run time rather than hardcoding them
 140 // Finds local fields only, including static fields.  Static field offsets are from the
 141 // beginning of the mirror.
 142 static void compute_offset(int &dest_offset,
 143                            InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
 144                            bool is_static = false) {
 145   fieldDescriptor fd;
 146   if (ik == NULL) {
 147     ResourceMark rm;
 148     log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string());
 149     vm_exit_during_initialization("Invalid layout of well-known class");
 150   }
 151 
 152   if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) {
 153     ResourceMark rm;
 154     log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(),
 155                      name_symbol->as_C_string(), signature_symbol->as_C_string());
 156 #ifndef PRODUCT
 157     // Prints all fields and offsets
 158     Log(class) lt;
 159     LogStream ls(lt.error());
 160     ik->print_on(&ls);
 161 #endif //PRODUCT
 162     vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
 163   }
 164   dest_offset = fd.offset();
 165 }
 166 
 167 // Overloading to pass name as a string.
 168 static void compute_offset(int& dest_offset, InstanceKlass* ik,
 169                            const char* name_string, Symbol* signature_symbol,
 170                            bool is_static = false) {
 171   TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string));
 172   if (name == NULL) {
 173     ResourceMark rm;
 174     log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string);
 175     vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name());
 176   }
 177   compute_offset(dest_offset, ik, name, signature_symbol, is_static);
 178 }
 179 
 180 
 181 #if INCLUDE_CDS
 182 #define FIELD_SERIALIZE_OFFSET(offset, klass, name, signature, is_static) \
 183   f->do_u4((u4*)&offset)
 184 #endif
 185 
 186 #define FIELD_COMPUTE_OFFSET(offset, klass, name, signature, is_static) \
 187   compute_offset(offset, klass, name, vmSymbols::signature(), is_static)
 188 
 189 
 190 // java_lang_String
 191 
 192 int java_lang_String::_value_offset;
 193 int java_lang_String::_hash_offset;
 194 int java_lang_String::_hashIsZero_offset;
 195 int java_lang_String::_coder_offset;
 196 
 197 bool java_lang_String::_initialized;
 198 
 199 bool java_lang_String::is_instance(oop obj) {
 200   return is_instance_inlined(obj);
 201 }
 202 
 203 #define STRING_FIELDS_DO(macro) \
 204   macro(_value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \
 205   macro(_hash_offset,  k, "hash",                  int_signature,        false); \
 206   macro(_hashIsZero_offset, k, "hashIsZero",       bool_signature,       false); \
 207   macro(_coder_offset, k, "coder",                 byte_signature,       false);
 208 
 209 void java_lang_String::compute_offsets() {
 210   if (_initialized) {
 211     return;
 212   }
 213 
 214   InstanceKlass* k = SystemDictionary::String_klass();
 215   STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
 216 
 217   _initialized = true;
 218 }
 219 
 220 #if INCLUDE_CDS
 221 void java_lang_String::serialize_offsets(SerializeClosure* f) {
 222   STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
 223   f->do_bool(&_initialized);
 224 }
 225 #endif
 226 
 227 class CompactStringsFixup : public FieldClosure {
 228 private:
 229   bool _value;
 230 
 231 public:
 232   CompactStringsFixup(bool value) : _value(value) {}
 233 
 234   void do_field(fieldDescriptor* fd) {
 235     if (fd->name() == vmSymbols::compact_strings_name()) {
 236       oop mirror = fd->field_holder()->java_mirror();
 237       assert(fd->field_holder() == SystemDictionary::String_klass(), "Should be String");
 238       assert(mirror != NULL, "String must have mirror already");
 239       mirror->bool_field_put(fd->offset(), _value);
 240     }
 241   }
 242 };
 243 
 244 void java_lang_String::set_compact_strings(bool value) {
 245   CompactStringsFixup fix(value);
 246   SystemDictionary::String_klass()->do_local_static_fields(&fix);
 247 }
 248 
 249 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
 250   assert(_initialized, "Must be initialized");
 251   assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
 252 
 253   // Create the String object first, so there's a chance that the String
 254   // and the char array it points to end up in the same cache line.
 255   oop obj;
 256   obj = SystemDictionary::String_klass()->allocate_instance(CHECK_NH);
 257 
 258   // Create the char array.  The String object must be handlized here
 259   // because GC can happen as a result of the allocation attempt.
 260   Handle h_obj(THREAD, obj);
 261   int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
 262   typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
 263 
 264   // Point the String at the char array
 265   obj = h_obj();
 266   set_value(obj, buffer);
 267   // No need to zero the offset, allocation zero'ed the entire String object
 268   set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
 269   return h_obj;
 270 }
 271 
 272 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) {
 273   bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
 274   Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
 275   typeArrayOop buffer = value(h_obj());
 276   assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
 277   if (is_latin1) {
 278     for (int index = 0; index < length; index++) {
 279       buffer->byte_at_put(index, (jbyte)unicode[index]);
 280     }
 281   } else {
 282     for (int index = 0; index < length; index++) {
 283       buffer->char_at_put(index, unicode[index]);
 284     }
 285   }
 286 
 287 #ifdef ASSERT
 288   {
 289     ResourceMark rm;
 290     char* expected = UNICODE::as_utf8(unicode, length);
 291     char* actual = as_utf8_string(h_obj());
 292     if (strcmp(expected, actual) != 0) {
 293       fatal("Unicode conversion failure: %s --> %s", expected, actual);
 294     }
 295   }
 296 #endif
 297 
 298   return h_obj;
 299 }
 300 
 301 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) {
 302   Handle h_obj = create_from_unicode(unicode, length, CHECK_NULL);
 303   return h_obj();
 304 }
 305 
 306 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
 307   if (utf8_str == NULL) {
 308     return Handle();
 309   }
 310   bool has_multibyte, is_latin1;
 311   int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
 312   if (!CompactStrings) {
 313     has_multibyte = true;
 314     is_latin1 = false;
 315   }
 316 
 317   Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
 318   if (length > 0) {
 319     if (!has_multibyte) {
 320       const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
 321       ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
 322     } else if (is_latin1) {
 323       UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
 324     } else {
 325       UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
 326     }
 327   }
 328 
 329 #ifdef ASSERT
 330   // This check is too strict when the input string is not a valid UTF8.
 331   // For example, it may be created with arbitrary content via jni_NewStringUTF.
 332   if (UTF8::is_legal_utf8((const unsigned char*)utf8_str, (int)strlen(utf8_str), false)) {
 333     ResourceMark rm;
 334     const char* expected = utf8_str;
 335     char* actual = as_utf8_string(h_obj());
 336     if (strcmp(expected, actual) != 0) {
 337       fatal("String conversion failure: %s --> %s", expected, actual);
 338     }
 339   }
 340 #endif
 341 
 342   return h_obj;
 343 }
 344 
 345 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
 346   Handle h_obj = create_from_str(utf8_str, CHECK_NULL);
 347   return h_obj();
 348 }
 349 
 350 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
 351   const char* utf8_str = (char*)symbol->bytes();
 352   int utf8_len = symbol->utf8_length();
 353 
 354   bool has_multibyte, is_latin1;
 355   int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
 356   if (!CompactStrings) {
 357     has_multibyte = true;
 358     is_latin1 = false;
 359   }
 360 
 361   Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
 362   if (length > 0) {
 363     if (!has_multibyte) {
 364       const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
 365       ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
 366     } else if (is_latin1) {
 367       UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
 368     } else {
 369       UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
 370     }
 371   }
 372 
 373 #ifdef ASSERT
 374   {
 375     ResourceMark rm;
 376     const char* expected = symbol->as_utf8();
 377     char* actual = as_utf8_string(h_obj());
 378     if (strncmp(expected, actual, utf8_len) != 0) {
 379       fatal("Symbol conversion failure: %s --> %s", expected, actual);
 380     }
 381   }
 382 #endif
 383 
 384   return h_obj;
 385 }
 386 
 387 // Converts a C string to a Java String based on current encoding
 388 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
 389   assert(str != NULL, "bad arguments");
 390 
 391   typedef jstring (JNICALL *to_java_string_fn_t)(JNIEnv*, const char *);
 392   static to_java_string_fn_t _to_java_string_fn = NULL;
 393 
 394   if (_to_java_string_fn == NULL) {
 395     void *lib_handle = os::native_java_library();
 396     _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "JNU_NewStringPlatform"));
 397 #if defined(_WIN32) && !defined(_WIN64)
 398     if (_to_java_string_fn == NULL) {
 399       // On 32 bit Windows, also try __stdcall decorated name
 400       _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "_JNU_NewStringPlatform@8"));
 401     }
 402 #endif
 403     if (_to_java_string_fn == NULL) {
 404       fatal("JNU_NewStringPlatform missing");
 405     }
 406   }
 407 
 408   jstring js = NULL;
 409   {
 410     assert(THREAD->is_Java_thread(), "must be java thread");
 411     JavaThread* thread = (JavaThread*)THREAD;
 412     HandleMark hm(thread);
 413     ThreadToNativeFromVM ttn(thread);
 414     js = (_to_java_string_fn)(thread->jni_environment(), str);
 415   }
 416 
 417   Handle native_platform_string(THREAD, JNIHandles::resolve(js));
 418   JNIHandles::destroy_local(js);  // destroy local JNIHandle.
 419   return native_platform_string;
 420 }
 421 
 422 // Converts a Java String to a native C string that can be used for
 423 // native OS calls.
 424 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
 425   typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
 426   static to_platform_string_fn_t _to_platform_string_fn = NULL;
 427 
 428   if (_to_platform_string_fn == NULL) {
 429     void *lib_handle = os::native_java_library();
 430     _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
 431     if (_to_platform_string_fn == NULL) {
 432       fatal("GetStringPlatformChars missing");
 433     }
 434   }
 435 
 436   char *native_platform_string;
 437   { JavaThread* thread = (JavaThread*)THREAD;
 438     assert(thread->is_Java_thread(), "must be java thread");
 439     JNIEnv *env = thread->jni_environment();
 440     jstring js = (jstring) JNIHandles::make_local(env, java_string());
 441     bool is_copy;
 442     HandleMark hm(thread);
 443     ThreadToNativeFromVM ttn(thread);
 444     native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
 445     assert(is_copy == JNI_TRUE, "is_copy value changed");
 446     JNIHandles::destroy_local(js);
 447   }
 448   return native_platform_string;
 449 }
 450 
 451 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
 452   oop          obj    = java_string();
 453   // Typical usage is to convert all '/' to '.' in string.
 454   typeArrayOop value  = java_lang_String::value(obj);
 455   int          length = java_lang_String::length(obj, value);
 456   bool      is_latin1 = java_lang_String::is_latin1(obj);
 457 
 458   // First check if any from_char exist
 459   int index; // Declared outside, used later
 460   for (index = 0; index < length; index++) {
 461     jchar c = !is_latin1 ? value->char_at(index) :
 462                   ((jchar) value->byte_at(index)) & 0xff;
 463     if (c == from_char) {
 464       break;
 465     }
 466   }
 467   if (index == length) {
 468     // No from_char, so do not copy.
 469     return java_string;
 470   }
 471 
 472   // Check if result string will be latin1
 473   bool to_is_latin1 = false;
 474 
 475   // Replacement char must be latin1
 476   if (CompactStrings && UNICODE::is_latin1(to_char)) {
 477     if (is_latin1) {
 478       // Source string is latin1 as well
 479       to_is_latin1 = true;
 480     } else if (!UNICODE::is_latin1(from_char)) {
 481       // We are replacing an UTF16 char. Scan string to
 482       // check if result can be latin1 encoded.
 483       to_is_latin1 = true;
 484       for (index = 0; index < length; index++) {
 485         jchar c = value->char_at(index);
 486         if (c != from_char && !UNICODE::is_latin1(c)) {
 487           to_is_latin1 = false;
 488           break;
 489         }
 490       }
 491     }
 492   }
 493 
 494   // Create new UNICODE (or byte) buffer. Must handlize value because GC
 495   // may happen during String and char array creation.
 496   typeArrayHandle h_value(THREAD, value);
 497   Handle string = basic_create(length, to_is_latin1, CHECK_NH);
 498   typeArrayOop from_buffer = h_value();
 499   typeArrayOop to_buffer = java_lang_String::value(string());
 500 
 501   // Copy contents
 502   for (index = 0; index < length; index++) {
 503     jchar c = (!is_latin1) ? from_buffer->char_at(index) :
 504                     ((jchar) from_buffer->byte_at(index)) & 0xff;
 505     if (c == from_char) {
 506       c = to_char;
 507     }
 508     if (!to_is_latin1) {
 509       to_buffer->char_at_put(index, c);
 510     } else {
 511       to_buffer->byte_at_put(index, (jbyte) c);
 512     }
 513   }
 514   return string;
 515 }
 516 
 517 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
 518   typeArrayOop value  = java_lang_String::value(java_string);
 519                length = java_lang_String::length(java_string, value);
 520   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 521 
 522   jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
 523   if (result != NULL) {
 524     if (!is_latin1) {
 525       for (int index = 0; index < length; index++) {
 526         result[index] = value->char_at(index);
 527       }
 528     } else {
 529       for (int index = 0; index < length; index++) {
 530         result[index] = ((jchar) value->byte_at(index)) & 0xff;
 531       }
 532     }
 533   } else {
 534     THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
 535   }
 536   return result;
 537 }
 538 
 539 unsigned int java_lang_String::hash_code(oop java_string) {
 540   // The hash and hashIsZero fields are subject to a benign data race,
 541   // making it crucial to ensure that any observable result of the
 542   // calculation in this method stays correct under any possible read of
 543   // these fields. Necessary restrictions to allow this to be correct
 544   // without explicit memory fences or similar concurrency primitives is
 545   // that we can ever only write to one of these two fields for a given
 546   // String instance, and that the computation is idempotent and derived
 547   // from immutable state
 548   assert(_initialized && (_hash_offset > 0) && (_hashIsZero_offset > 0), "Must be initialized");
 549   if (java_lang_String::hash_is_set(java_string)) {
 550     return java_string->int_field(_hash_offset);
 551   }
 552 
 553   typeArrayOop value = java_lang_String::value(java_string);
 554   int         length = java_lang_String::length(java_string, value);
 555   bool     is_latin1 = java_lang_String::is_latin1(java_string);
 556 
 557   unsigned int hash = 0;
 558   if (length > 0) {
 559     if (is_latin1) {
 560       hash = java_lang_String::hash_code(value->byte_at_addr(0), length);
 561     } else {
 562       hash = java_lang_String::hash_code(value->char_at_addr(0), length);
 563     }
 564   }
 565 
 566   if (hash != 0) {
 567     java_string->int_field_put(_hash_offset, hash);
 568   } else {
 569     java_string->bool_field_put(_hashIsZero_offset, true);
 570   }
 571   return hash;
 572 }
 573 
 574 char* java_lang_String::as_quoted_ascii(oop java_string) {
 575   typeArrayOop value  = java_lang_String::value(java_string);
 576   int          length = java_lang_String::length(java_string, value);
 577   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 578 
 579   if (length == 0) return NULL;
 580 
 581   char* result;
 582   int result_length;
 583   if (!is_latin1) {
 584     jchar* base = value->char_at_addr(0);
 585     result_length = UNICODE::quoted_ascii_length(base, length) + 1;
 586     result = NEW_RESOURCE_ARRAY(char, result_length);
 587     UNICODE::as_quoted_ascii(base, length, result, result_length);
 588   } else {
 589     jbyte* base = value->byte_at_addr(0);
 590     result_length = UNICODE::quoted_ascii_length(base, length) + 1;
 591     result = NEW_RESOURCE_ARRAY(char, result_length);
 592     UNICODE::as_quoted_ascii(base, length, result, result_length);
 593   }
 594   assert(result_length >= length + 1, "must not be shorter");
 595   assert(result_length == (int)strlen(result) + 1, "must match");
 596   return result;
 597 }
 598 
 599 Symbol* java_lang_String::as_symbol(oop java_string) {
 600   typeArrayOop value  = java_lang_String::value(java_string);
 601   int          length = java_lang_String::length(java_string, value);
 602   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 603   if (!is_latin1) {
 604     jchar* base = (length == 0) ? NULL : value->char_at_addr(0);
 605     Symbol* sym = SymbolTable::new_symbol(base, length);
 606     return sym;
 607   } else {
 608     ResourceMark rm;
 609     jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
 610     const char* base = UNICODE::as_utf8(position, length);
 611     Symbol* sym = SymbolTable::new_symbol(base, length);
 612     return sym;
 613   }
 614 }
 615 
 616 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
 617   typeArrayOop value  = java_lang_String::value(java_string);
 618   int          length = java_lang_String::length(java_string, value);
 619   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 620   if (!is_latin1) {
 621     jchar* base = (length == 0) ? NULL : value->char_at_addr(0);
 622     return SymbolTable::probe_unicode(base, length);
 623   } else {
 624     ResourceMark rm;
 625     jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
 626     const char* base = UNICODE::as_utf8(position, length);
 627     return SymbolTable::probe(base, length);
 628   }
 629 }
 630 
 631 int java_lang_String::utf8_length(oop java_string, typeArrayOop value) {
 632   assert(value_equals(value, java_lang_String::value(java_string)),
 633          "value must be same as java_lang_String::value(java_string)");
 634   int length = java_lang_String::length(java_string, value);
 635   if (length == 0) {
 636     return 0;
 637   }
 638   if (!java_lang_String::is_latin1(java_string)) {
 639     return UNICODE::utf8_length(value->char_at_addr(0), length);
 640   } else {
 641     return UNICODE::utf8_length(value->byte_at_addr(0), length);
 642   }
 643 }
 644 
 645 int java_lang_String::utf8_length(oop java_string) {
 646   typeArrayOop value = java_lang_String::value(java_string);
 647   return utf8_length(java_string, value);
 648 }
 649 
 650 char* java_lang_String::as_utf8_string(oop java_string) {
 651   int length;
 652   return as_utf8_string(java_string, length);
 653 }
 654 
 655 char* java_lang_String::as_utf8_string(oop java_string, int& length) {
 656   typeArrayOop value = java_lang_String::value(java_string);
 657   length             = java_lang_String::length(java_string, value);
 658   bool     is_latin1 = java_lang_String::is_latin1(java_string);
 659   if (!is_latin1) {
 660     jchar* position = (length == 0) ? NULL : value->char_at_addr(0);
 661     return UNICODE::as_utf8(position, length);
 662   } else {
 663     jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
 664     return UNICODE::as_utf8(position, length);
 665   }
 666 }
 667 
 668 // Uses a provided buffer if it's sufficiently large, otherwise allocates
 669 // a resource array to fit
 670 char* java_lang_String::as_utf8_string_full(oop java_string, char* buf, int buflen, int& utf8_len) {
 671   typeArrayOop value = java_lang_String::value(java_string);
 672   int            len = java_lang_String::length(java_string, value);
 673   bool     is_latin1 = java_lang_String::is_latin1(java_string);
 674   if (!is_latin1) {
 675     jchar *position = (len == 0) ? NULL : value->char_at_addr(0);
 676     utf8_len = UNICODE::utf8_length(position, len);
 677     if (utf8_len >= buflen) {
 678       buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
 679     }
 680     return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
 681   } else {
 682     jbyte *position = (len == 0) ? NULL : value->byte_at_addr(0);
 683     utf8_len = UNICODE::utf8_length(position, len);
 684     if (utf8_len >= buflen) {
 685       buf = NEW_RESOURCE_ARRAY(char, utf8_len + 1);
 686     }
 687     return UNICODE::as_utf8(position, len, buf, utf8_len + 1);
 688   }
 689 }
 690 
 691 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, int buflen) {
 692   assert(value_equals(value, java_lang_String::value(java_string)),
 693          "value must be same as java_lang_String::value(java_string)");
 694   int     length = java_lang_String::length(java_string, value);
 695   bool is_latin1 = java_lang_String::is_latin1(java_string);
 696   if (!is_latin1) {
 697     jchar* position = (length == 0) ? NULL : value->char_at_addr(0);
 698     return UNICODE::as_utf8(position, length, buf, buflen);
 699   } else {
 700     jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
 701     return UNICODE::as_utf8(position, length, buf, buflen);
 702   }
 703 }
 704 
 705 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
 706   typeArrayOop value = java_lang_String::value(java_string);
 707   return as_utf8_string(java_string, value, buf, buflen);
 708 }
 709 
 710 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
 711   typeArrayOop value  = java_lang_String::value(java_string);
 712   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 713   assert(start + len <= java_lang_String::length(java_string), "just checking");
 714   if (!is_latin1) {
 715     jchar* position = value->char_at_addr(start);
 716     return UNICODE::as_utf8(position, len);
 717   } else {
 718     jbyte* position = value->byte_at_addr(start);
 719     return UNICODE::as_utf8(position, len);
 720   }
 721 }
 722 
 723 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, int buflen) {
 724   assert(value_equals(value, java_lang_String::value(java_string)),
 725          "value must be same as java_lang_String::value(java_string)");
 726   assert(start + len <= java_lang_String::length(java_string), "just checking");
 727   bool is_latin1 = java_lang_String::is_latin1(java_string);
 728   if (!is_latin1) {
 729     jchar* position = value->char_at_addr(start);
 730     return UNICODE::as_utf8(position, len, buf, buflen);
 731   } else {
 732     jbyte* position = value->byte_at_addr(start);
 733     return UNICODE::as_utf8(position, len, buf, buflen);
 734   }
 735 }
 736 
 737 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) {
 738   assert(java_string->klass() == SystemDictionary::String_klass(),
 739          "must be java_string");
 740   typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
 741   int length = java_lang_String::length(java_string, value);
 742   if (length != len) {
 743     return false;
 744   }
 745   bool is_latin1 = java_lang_String::is_latin1(java_string);
 746   if (!is_latin1) {
 747     for (int i = 0; i < len; i++) {
 748       if (value->char_at(i) != chars[i]) {
 749         return false;
 750       }
 751     }
 752   } else {
 753     for (int i = 0; i < len; i++) {
 754       if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
 755         return false;
 756       }
 757     }
 758   }
 759   return true;
 760 }
 761 
 762 bool java_lang_String::equals(oop str1, oop str2) {
 763   assert(str1->klass() == SystemDictionary::String_klass(),
 764          "must be java String");
 765   assert(str2->klass() == SystemDictionary::String_klass(),
 766          "must be java String");
 767   typeArrayOop value1    = java_lang_String::value_no_keepalive(str1);
 768   bool         is_latin1 = java_lang_String::is_latin1(str1);
 769   typeArrayOop value2    = java_lang_String::value_no_keepalive(str2);
 770   bool         is_latin2 = java_lang_String::is_latin1(str2);
 771 
 772   if (is_latin1 != is_latin2) {
 773     // Strings with different coders are never equal.
 774     return false;
 775   }
 776   return value_equals(value1, value2);
 777 }
 778 
 779 void java_lang_String::print(oop java_string, outputStream* st) {
 780   assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string");
 781   typeArrayOop value  = java_lang_String::value_no_keepalive(java_string);
 782 
 783   if (value == NULL) {
 784     // This can happen if, e.g., printing a String
 785     // object before its initializer has been called
 786     st->print("NULL");
 787     return;
 788   }
 789 
 790   int length = java_lang_String::length(java_string, value);
 791   bool is_latin1 = java_lang_String::is_latin1(java_string);
 792 
 793   st->print("\"");
 794   for (int index = 0; index < length; index++) {
 795     st->print("%c", (!is_latin1) ?  value->char_at(index) :
 796                            ((jchar) value->byte_at(index)) & 0xff );
 797   }
 798   st->print("\"");
 799 }
 800 
 801 // java_lang_Class
 802 
 803 int java_lang_Class::_klass_offset;
 804 int java_lang_Class::_array_klass_offset;
 805 int java_lang_Class::_oop_size_offset;
 806 int java_lang_Class::_static_oop_field_count_offset;
 807 int java_lang_Class::_class_loader_offset;
 808 int java_lang_Class::_module_offset;
 809 int java_lang_Class::_protection_domain_offset;
 810 int java_lang_Class::_component_mirror_offset;
 811 int java_lang_Class::_init_lock_offset;
 812 int java_lang_Class::_signers_offset;
 813 int java_lang_Class::_name_offset;
 814 int java_lang_Class::_source_file_offset;
 815 int java_lang_Class::_classData_offset;
 816 int java_lang_Class::_classRedefinedCount_offset;
 817 
 818 bool java_lang_Class::_offsets_computed = false;
 819 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
 820 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL;
 821 
 822 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
 823   assert(mirror.not_null() && fd->is_static(), "just checking");
 824   if (fd->has_initial_value()) {
 825     BasicType t = fd->field_type();
 826     switch (t) {
 827       case T_BYTE:
 828         mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
 829               break;
 830       case T_BOOLEAN:
 831         mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
 832               break;
 833       case T_CHAR:
 834         mirror()->char_field_put(fd->offset(), fd->int_initial_value());
 835               break;
 836       case T_SHORT:
 837         mirror()->short_field_put(fd->offset(), fd->int_initial_value());
 838               break;
 839       case T_INT:
 840         mirror()->int_field_put(fd->offset(), fd->int_initial_value());
 841         break;
 842       case T_FLOAT:
 843         mirror()->float_field_put(fd->offset(), fd->float_initial_value());
 844         break;
 845       case T_DOUBLE:
 846         mirror()->double_field_put(fd->offset(), fd->double_initial_value());
 847         break;
 848       case T_LONG:
 849         mirror()->long_field_put(fd->offset(), fd->long_initial_value());
 850         break;
 851       case T_OBJECT:
 852         {
 853           assert(fd->signature() == vmSymbols::string_signature(),
 854                  "just checking");
 855           if (DumpSharedSpaces && HeapShared::is_archived_object(mirror())) {
 856             // Archive the String field and update the pointer.
 857             oop s = mirror()->obj_field(fd->offset());
 858             oop archived_s = StringTable::create_archived_string(s, CHECK);
 859             mirror()->obj_field_put(fd->offset(), archived_s);
 860           } else {
 861             oop string = fd->string_initial_value(CHECK);
 862             mirror()->obj_field_put(fd->offset(), string);
 863           }
 864         }
 865         break;
 866       default:
 867         THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
 868                   "Illegal ConstantValue attribute in class file");
 869     }
 870   }
 871 }
 872 
 873 
 874 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
 875   assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
 876 
 877   // If the offset was read from the shared archive, it was fixed up already
 878   if (!k->is_shared()) {
 879     if (k->is_instance_klass()) {
 880       // During bootstrap, java.lang.Class wasn't loaded so static field
 881       // offsets were computed without the size added it.  Go back and
 882       // update all the static field offsets to included the size.
 883       for (JavaFieldStream fs(InstanceKlass::cast(k)); !fs.done(); fs.next()) {
 884         if (fs.access_flags().is_static()) {
 885           int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields();
 886           fs.set_offset(real_offset);
 887         }
 888       }
 889     }
 890   }
 891 
 892   if (k->is_shared() && k->has_raw_archived_mirror()) {
 893     if (HeapShared::open_archive_heap_region_mapped()) {
 894       bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK);
 895       assert(present, "Missing archived mirror for %s", k->external_name());
 896       return;
 897     } else {
 898       k->set_java_mirror_handle(OopHandle());
 899       k->clear_has_raw_archived_mirror();
 900     }
 901   }
 902   create_mirror(k, Handle(), Handle(), Handle(), Handle(), CHECK);
 903 }
 904 
 905 void java_lang_Class::initialize_mirror_fields(Klass* k,
 906                                                Handle mirror,
 907                                                Handle protection_domain,
 908                                                Handle classData,
 909                                                TRAPS) {
 910   // Allocate a simple java object for a lock.
 911   // This needs to be a java object because during class initialization
 912   // it can be held across a java call.
 913   typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
 914   set_init_lock(mirror(), r);
 915 
 916   // Set protection domain also
 917   set_protection_domain(mirror(), protection_domain());
 918 
 919   // Initialize static fields
 920   InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK);
 921 
 922  // Set classData
 923   set_class_data(mirror(), classData());
 924 }
 925 
 926 // Set the java.lang.Module module field in the java_lang_Class mirror
 927 void java_lang_Class::set_mirror_module_field(Klass* k, Handle mirror, Handle module, TRAPS) {
 928   if (module.is_null()) {
 929     // During startup, the module may be NULL only if java.base has not been defined yet.
 930     // Put the class on the fixup_module_list to patch later when the java.lang.Module
 931     // for java.base is known. But note that since we captured the NULL module another
 932     // thread may have completed that initialization.
 933 
 934     bool javabase_was_defined = false;
 935     {
 936       MutexLocker m1(THREAD, Module_lock);
 937       // Keep list of classes needing java.base module fixup
 938       if (!ModuleEntryTable::javabase_defined()) {
 939         assert(k->java_mirror() != NULL, "Class's mirror is null");
 940         k->class_loader_data()->inc_keep_alive();
 941         assert(fixup_module_field_list() != NULL, "fixup_module_field_list not initialized");
 942         fixup_module_field_list()->push(k);
 943       } else {
 944         javabase_was_defined = true;
 945       }
 946     }
 947 
 948     // If java.base was already defined then patch this particular class with java.base.
 949     if (javabase_was_defined) {
 950       ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
 951       assert(javabase_entry != NULL && javabase_entry->module() != NULL,
 952              "Setting class module field, " JAVA_BASE_NAME " should be defined");
 953       Handle javabase_handle(THREAD, javabase_entry->module());
 954       set_module(mirror(), javabase_handle());
 955     }
 956   } else {
 957     assert(Universe::is_module_initialized() ||
 958            (ModuleEntryTable::javabase_defined() &&
 959             (module() == ModuleEntryTable::javabase_moduleEntry()->module())),
 960            "Incorrect java.lang.Module specification while creating mirror");
 961     set_module(mirror(), module());
 962   }
 963 }
 964 
 965 // Statically allocate fixup lists because they always get created.
 966 void java_lang_Class::allocate_fixup_lists() {
 967   GrowableArray<Klass*>* mirror_list =
 968     new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, mtClass);
 969   set_fixup_mirror_list(mirror_list);
 970 
 971   GrowableArray<Klass*>* module_list =
 972     new (ResourceObj::C_HEAP, mtModule) GrowableArray<Klass*>(500, mtModule);
 973   set_fixup_module_field_list(module_list);
 974 }
 975 
 976 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
 977                                     Handle module, Handle protection_domain,
 978                                     Handle classData, TRAPS) {
 979   assert(k != NULL, "Use create_basic_type_mirror for primitive types");
 980   assert(k->java_mirror() == NULL, "should only assign mirror once");
 981 
 982   // Use this moment of initialization to cache modifier_flags also,
 983   // to support Class.getModifiers().  Instance classes recalculate
 984   // the cached flags after the class file is parsed, but before the
 985   // class is put into the system dictionary.
 986   int computed_modifiers = k->compute_modifier_flags(CHECK);
 987   k->set_modifier_flags(computed_modifiers);
 988   // Class_klass has to be loaded because it is used to allocate
 989   // the mirror.
 990   if (SystemDictionary::Class_klass_loaded()) {
 991     // Allocate mirror (java.lang.Class instance)
 992     oop mirror_oop = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK);
 993     Handle mirror(THREAD, mirror_oop);
 994     Handle comp_mirror;
 995 
 996     // Setup indirection from mirror->klass
 997     java_lang_Class::set_klass(mirror(), k);
 998 
 999     InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
1000     assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
1001 
1002     java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
1003 
1004     // It might also have a component mirror.  This mirror must already exist.
1005     if (k->is_array_klass()) {
1006       if (k->is_typeArray_klass()) {
1007         BasicType type = TypeArrayKlass::cast(k)->element_type();
1008         comp_mirror = Handle(THREAD, Universe::java_mirror(type));
1009       } else {
1010         assert(k->is_objArray_klass(), "Must be");
1011         Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1012         assert(element_klass != NULL, "Must have an element klass");
1013         comp_mirror = Handle(THREAD, element_klass->java_mirror());
1014       }
1015       assert(comp_mirror() != NULL, "must have a mirror");
1016 
1017       // Two-way link between the array klass and its component mirror:
1018       // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
1019       set_component_mirror(mirror(), comp_mirror());
1020       // See below for ordering dependencies between field array_klass in component mirror
1021       // and java_mirror in this klass.
1022     } else {
1023       assert(k->is_instance_klass(), "Must be");
1024 
1025       initialize_mirror_fields(k, mirror, protection_domain, classData, THREAD);
1026       if (HAS_PENDING_EXCEPTION) {
1027         // If any of the fields throws an exception like OOM remove the klass field
1028         // from the mirror so GC doesn't follow it after the klass has been deallocated.
1029         // This mirror looks like a primitive type, which logically it is because it
1030         // it represents no class.
1031         java_lang_Class::set_klass(mirror(), NULL);
1032         return;
1033       }
1034     }
1035 
1036     // set the classLoader field in the java_lang_Class instance
1037     assert(class_loader() == k->class_loader(), "should be same");
1038     set_class_loader(mirror(), class_loader());
1039 
1040     // Setup indirection from klass->mirror
1041     // after any exceptions can happen during allocations.
1042     k->set_java_mirror(mirror);
1043 
1044     // Set the module field in the java_lang_Class instance.  This must be done
1045     // after the mirror is set.
1046     set_mirror_module_field(k, mirror, module, THREAD);
1047 
1048     if (comp_mirror() != NULL) {
1049       // Set after k->java_mirror() is published, because compiled code running
1050       // concurrently doesn't expect a k to have a null java_mirror.
1051       release_set_array_klass(comp_mirror(), k);
1052     }
1053   } else {
1054     assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized");
1055     fixup_mirror_list()->push(k);
1056   }
1057 }
1058 
1059 #if INCLUDE_CDS_JAVA_HEAP
1060 // Clears mirror fields. Static final fields with initial values are reloaded
1061 // from constant pool. The object identity hash is in the object header and is
1062 // not affected.
1063 class ResetMirrorField: public FieldClosure {
1064  private:
1065   Handle _m;
1066 
1067  public:
1068   ResetMirrorField(Handle mirror) : _m(mirror) {}
1069 
1070   void do_field(fieldDescriptor* fd) {
1071     assert(DumpSharedSpaces, "dump time only");
1072     assert(_m.not_null(), "Mirror cannot be NULL");
1073 
1074     if (fd->is_static() && fd->has_initial_value()) {
1075       initialize_static_field(fd, _m, Thread::current());
1076       return;
1077     }
1078 
1079     BasicType ft = fd->field_type();
1080     switch (ft) {
1081       case T_BYTE:
1082         _m()->byte_field_put(fd->offset(), 0);
1083         break;
1084       case T_CHAR:
1085         _m()->char_field_put(fd->offset(), 0);
1086         break;
1087       case T_DOUBLE:
1088         _m()->double_field_put(fd->offset(), 0);
1089         break;
1090       case T_FLOAT:
1091         _m()->float_field_put(fd->offset(), 0);
1092         break;
1093       case T_INT:
1094         _m()->int_field_put(fd->offset(), 0);
1095         break;
1096       case T_LONG:
1097         _m()->long_field_put(fd->offset(), 0);
1098         break;
1099       case T_SHORT:
1100         _m()->short_field_put(fd->offset(), 0);
1101         break;
1102       case T_BOOLEAN:
1103         _m()->bool_field_put(fd->offset(), false);
1104         break;
1105       case T_ARRAY:
1106       case T_OBJECT: {
1107         // It might be useful to cache the String field, but
1108         // for now just clear out any reference field
1109         oop o = _m()->obj_field(fd->offset());
1110         _m()->obj_field_put(fd->offset(), NULL);
1111         break;
1112       }
1113       default:
1114         ShouldNotReachHere();
1115         break;
1116      }
1117   }
1118 };
1119 
1120 void java_lang_Class::archive_basic_type_mirrors(TRAPS) {
1121   assert(HeapShared::is_heap_object_archiving_allowed(),
1122          "HeapShared::is_heap_object_archiving_allowed() must be true");
1123 
1124   for (int t = 0; t <= T_VOID; t++) {
1125     oop m = Universe::_mirrors[t];
1126     if (m != NULL) {
1127       // Update the field at _array_klass_offset to point to the relocated array klass.
1128       oop archived_m = HeapShared::archive_heap_object(m, THREAD);
1129       assert(archived_m != NULL, "sanity");
1130       Klass *ak = (Klass*)(archived_m->metadata_field(_array_klass_offset));
1131       assert(ak != NULL || t == T_VOID, "should not be NULL");
1132       if (ak != NULL) {
1133         Klass *reloc_ak = MetaspaceShared::get_relocated_klass(ak, true);
1134         archived_m->metadata_field_put(_array_klass_offset, reloc_ak);
1135       }
1136 
1137       // Clear the fields. Just to be safe
1138       Klass *k = m->klass();
1139       Handle archived_mirror_h(THREAD, archived_m);
1140       ResetMirrorField reset(archived_mirror_h);
1141       InstanceKlass::cast(k)->do_nonstatic_fields(&reset);
1142 
1143       log_trace(cds, heap, mirror)(
1144         "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT,
1145         type2name((BasicType)t), p2i(Universe::_mirrors[t]), p2i(archived_m));
1146 
1147       Universe::_mirrors[t] = archived_m;
1148     }
1149   }
1150 
1151   assert(Universe::_mirrors[T_INT] != NULL &&
1152          Universe::_mirrors[T_FLOAT] != NULL &&
1153          Universe::_mirrors[T_DOUBLE] != NULL &&
1154          Universe::_mirrors[T_BYTE] != NULL &&
1155          Universe::_mirrors[T_BOOLEAN] != NULL &&
1156          Universe::_mirrors[T_CHAR] != NULL &&
1157          Universe::_mirrors[T_LONG] != NULL &&
1158          Universe::_mirrors[T_SHORT] != NULL &&
1159          Universe::_mirrors[T_VOID] != NULL, "sanity");
1160 
1161   Universe::set_int_mirror(Universe::_mirrors[T_INT]);
1162   Universe::set_float_mirror(Universe::_mirrors[T_FLOAT]);
1163   Universe::set_double_mirror(Universe::_mirrors[T_DOUBLE]);
1164   Universe::set_byte_mirror(Universe::_mirrors[T_BYTE]);
1165   Universe::set_bool_mirror(Universe::_mirrors[T_BOOLEAN]);
1166   Universe::set_char_mirror(Universe::_mirrors[T_CHAR]);
1167   Universe::set_long_mirror(Universe::_mirrors[T_LONG]);
1168   Universe::set_short_mirror(Universe::_mirrors[T_SHORT]);
1169   Universe::set_void_mirror(Universe::_mirrors[T_VOID]);
1170 }
1171 
1172 //
1173 // After the mirror object is successfully archived, the archived
1174 // klass is set with _has_archived_raw_mirror flag.
1175 //
1176 // The _has_archived_raw_mirror flag is cleared at runtime when the
1177 // archived mirror is restored. If archived java heap data cannot
1178 // be used at runtime, new mirror object is created for the shared
1179 // class. The _has_archived_raw_mirror is cleared also during the process.
1180 oop java_lang_Class::archive_mirror(Klass* k, TRAPS) {
1181   assert(HeapShared::is_heap_object_archiving_allowed(),
1182          "HeapShared::is_heap_object_archiving_allowed() must be true");
1183 
1184   // Mirror is already archived
1185   if (k->has_raw_archived_mirror()) {
1186     assert(k->archived_java_mirror_raw() != NULL, "no archived mirror");
1187     return k->archived_java_mirror_raw();
1188   }
1189 
1190   // No mirror
1191   oop mirror = k->java_mirror();
1192   if (mirror == NULL) {
1193     return NULL;
1194   }
1195 
1196   if (k->is_instance_klass()) {
1197     InstanceKlass *ik = InstanceKlass::cast(k);
1198     assert(ik->signers() == NULL, "class with signer should have been excluded");
1199 
1200     if (!(ik->is_shared_boot_class() || ik->is_shared_platform_class() ||
1201           ik->is_shared_app_class())) {
1202       // Archiving mirror for classes from non-builtin loaders is not
1203       // supported. Clear the _java_mirror within the archived class.
1204       k->set_java_mirror_handle(OopHandle());
1205       return NULL;
1206     }
1207   }
1208 
1209   // Now start archiving the mirror object
1210   oop archived_mirror = HeapShared::archive_heap_object(mirror, THREAD);
1211   if (archived_mirror == NULL) {
1212     return NULL;
1213   }
1214 
1215   archived_mirror = process_archived_mirror(k, mirror, archived_mirror, THREAD);
1216   if (archived_mirror == NULL) {
1217     return NULL;
1218   }
1219 
1220   k->set_archived_java_mirror_raw(archived_mirror);
1221 
1222   k->set_has_raw_archived_mirror();
1223 
1224   ResourceMark rm;
1225   log_trace(cds, heap, mirror)(
1226     "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT,
1227     k->external_name(), p2i(mirror), p2i(archived_mirror));
1228 
1229   return archived_mirror;
1230 }
1231 
1232 // The process is based on create_mirror().
1233 oop java_lang_Class::process_archived_mirror(Klass* k, oop mirror,
1234                                              oop archived_mirror,
1235                                              Thread *THREAD) {
1236   // Clear nonstatic fields in archived mirror. Some of the fields will be set
1237   // to archived metadata and objects below.
1238   Klass *c = archived_mirror->klass();
1239   Handle archived_mirror_h(THREAD, archived_mirror);
1240   ResetMirrorField reset(archived_mirror_h);
1241   InstanceKlass::cast(c)->do_nonstatic_fields(&reset);
1242 
1243   if (k->is_array_klass()) {
1244     oop archived_comp_mirror;
1245     if (k->is_typeArray_klass()) {
1246       // The primitive type mirrors are already archived. Get the archived mirror.
1247       oop comp_mirror = java_lang_Class::component_mirror(mirror);
1248       archived_comp_mirror = HeapShared::find_archived_heap_object(comp_mirror);
1249       assert(archived_comp_mirror != NULL, "Must be");
1250     } else {
1251       assert(k->is_objArray_klass(), "Must be");
1252       Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1253       assert(element_klass != NULL, "Must have an element klass");
1254       archived_comp_mirror = archive_mirror(element_klass, THREAD);
1255       if (archived_comp_mirror == NULL) {
1256         return NULL;
1257       }
1258     }
1259     java_lang_Class::set_component_mirror(archived_mirror, archived_comp_mirror);
1260   } else {
1261     assert(k->is_instance_klass(), "Must be");
1262 
1263     // Reset local static fields in the mirror
1264     InstanceKlass::cast(k)->do_local_static_fields(&reset);
1265 
1266     java_lang_Class:set_init_lock(archived_mirror, NULL);
1267 
1268     set_protection_domain(archived_mirror, NULL);
1269   }
1270 
1271   // clear class loader and mirror_module_field
1272   set_class_loader(archived_mirror, NULL);
1273   set_module(archived_mirror, NULL);
1274 
1275   // The archived mirror's field at _klass_offset is still pointing to the original
1276   // klass. Updated the field in the archived mirror to point to the relocated
1277   // klass in the archive.
1278   Klass *reloc_k = MetaspaceShared::get_relocated_klass(as_Klass(mirror), true);
1279   log_debug(cds, heap, mirror)(
1280     "Relocate mirror metadata field at _klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT,
1281     p2i(as_Klass(mirror)), p2i(reloc_k));
1282   archived_mirror->metadata_field_put(_klass_offset, reloc_k);
1283 
1284   // The field at _array_klass_offset is pointing to the original one dimension
1285   // higher array klass if exists. Relocate the pointer.
1286   Klass *arr = array_klass_acquire(mirror);
1287   if (arr != NULL) {
1288     Klass *reloc_arr = MetaspaceShared::get_relocated_klass(arr, true);
1289     log_debug(cds, heap, mirror)(
1290       "Relocate mirror metadata field at _array_klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT,
1291       p2i(arr), p2i(reloc_arr));
1292     archived_mirror->metadata_field_put(_array_klass_offset, reloc_arr);
1293   }
1294   return archived_mirror;
1295 }
1296 
1297 void java_lang_Class::update_archived_primitive_mirror_native_pointers(oop archived_mirror) {
1298   if (MetaspaceShared::relocation_delta() != 0) {
1299     assert(archived_mirror->metadata_field(_klass_offset) == NULL, "must be for primitive class");
1300 
1301     Klass* ak = ((Klass*)archived_mirror->metadata_field(_array_klass_offset));
1302     if (ak != NULL) {
1303       archived_mirror->metadata_field_put(_array_klass_offset,
1304           (Klass*)(address(ak) + MetaspaceShared::relocation_delta()));
1305     }
1306   }
1307 }
1308 
1309 void java_lang_Class::update_archived_mirror_native_pointers(oop archived_mirror) {
1310   assert(MetaspaceShared::relocation_delta() != 0, "must be");
1311 
1312   Klass* k = ((Klass*)archived_mirror->metadata_field(_klass_offset));
1313   archived_mirror->metadata_field_put(_klass_offset,
1314       (Klass*)(address(k) + MetaspaceShared::relocation_delta()));
1315 
1316   Klass* ak = ((Klass*)archived_mirror->metadata_field(_array_klass_offset));
1317   if (ak != NULL) {
1318     archived_mirror->metadata_field_put(_array_klass_offset,
1319         (Klass*)(address(ak) + MetaspaceShared::relocation_delta()));
1320   }
1321 }
1322 
1323 
1324 // Returns true if the mirror is updated, false if no archived mirror
1325 // data is present. After the archived mirror object is restored, the
1326 // shared klass' _has_raw_archived_mirror flag is cleared.
1327 bool java_lang_Class::restore_archived_mirror(Klass *k,
1328                                               Handle class_loader, Handle module,
1329                                               Handle protection_domain, TRAPS) {
1330   // Postpone restoring archived mirror until java.lang.Class is loaded. Please
1331   // see more details in SystemDictionary::resolve_well_known_classes().
1332   if (!SystemDictionary::Class_klass_loaded()) {
1333     assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized");
1334     fixup_mirror_list()->push(k);
1335     return true;
1336   }
1337 
1338   oop m = HeapShared::materialize_archived_object(k->archived_java_mirror_raw_narrow());
1339   if (m == NULL) {
1340     return false;
1341   }
1342 
1343   // mirror is archived, restore
1344   log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1345   assert(HeapShared::is_archived_object(m), "must be archived mirror object");
1346   assert(as_Klass(m) == k, "must be");
1347   Handle mirror(THREAD, m);
1348 
1349   if (!k->is_array_klass()) {
1350     // - local static final fields with initial values were initialized at dump time
1351 
1352     // create the init_lock
1353     typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false));
1354     set_init_lock(mirror(), r);
1355 
1356     if (protection_domain.not_null()) {
1357       set_protection_domain(mirror(), protection_domain());
1358     }
1359   }
1360 
1361   assert(class_loader() == k->class_loader(), "should be same");
1362   if (class_loader.not_null()) {
1363     set_class_loader(mirror(), class_loader());
1364   }
1365 
1366   k->set_java_mirror(mirror);
1367   k->clear_has_raw_archived_mirror();
1368 
1369   set_mirror_module_field(k, mirror, module, THREAD);
1370 
1371   if (log_is_enabled(Trace, cds, heap, mirror)) {
1372     ResourceMark rm(THREAD);
1373     log_trace(cds, heap, mirror)(
1374         "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1375   }
1376 
1377   return true;
1378 }
1379 #endif // INCLUDE_CDS_JAVA_HEAP
1380 
1381 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1382   assert(_module_offset != 0, "must have been computed already");
1383   java_lang_Class::set_module(k->java_mirror(), module());
1384 }
1385 
1386 int  java_lang_Class::oop_size(oop java_class) {
1387   assert(_oop_size_offset != 0, "must be set");
1388   int size = java_class->int_field(_oop_size_offset);
1389   assert(size > 0, "Oop size must be greater than zero, not %d", size);
1390   return size;
1391 }
1392 
1393 
1394 void java_lang_Class::set_oop_size(HeapWord* java_class, int size) {
1395   assert(_oop_size_offset != 0, "must be set");
1396   assert(size > 0, "Oop size must be greater than zero, not %d", size);
1397   *(int*)(((char*)java_class) + _oop_size_offset) = size;
1398 }
1399 
1400 int  java_lang_Class::static_oop_field_count(oop java_class) {
1401   assert(_static_oop_field_count_offset != 0, "must be set");
1402   return java_class->int_field(_static_oop_field_count_offset);
1403 }
1404 
1405 int  java_lang_Class::static_oop_field_count_raw(oop java_class) {
1406   assert(_static_oop_field_count_offset != 0, "must be set");
1407   return java_class->int_field_raw(_static_oop_field_count_offset);
1408 }
1409 
1410 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1411   assert(_static_oop_field_count_offset != 0, "must be set");
1412   java_class->int_field_put(_static_oop_field_count_offset, size);
1413 }
1414 
1415 oop java_lang_Class::protection_domain(oop java_class) {
1416   assert(_protection_domain_offset != 0, "must be set");
1417   return java_class->obj_field(_protection_domain_offset);
1418 }
1419 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1420   assert(_protection_domain_offset != 0, "must be set");
1421   java_class->obj_field_put(_protection_domain_offset, pd);
1422 }
1423 
1424 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1425   assert(_component_mirror_offset != 0, "must be set");
1426     java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1427   }
1428 oop java_lang_Class::component_mirror(oop java_class) {
1429   assert(_component_mirror_offset != 0, "must be set");
1430   return java_class->obj_field(_component_mirror_offset);
1431 }
1432 
1433 oop java_lang_Class::init_lock(oop java_class) {
1434   assert(_init_lock_offset != 0, "must be set");
1435   return java_class->obj_field(_init_lock_offset);
1436 }
1437 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
1438   assert(_init_lock_offset != 0, "must be set");
1439   java_class->obj_field_put(_init_lock_offset, init_lock);
1440 }
1441 
1442 objArrayOop java_lang_Class::signers(oop java_class) {
1443   assert(_signers_offset != 0, "must be set");
1444   return (objArrayOop)java_class->obj_field(_signers_offset);
1445 }
1446 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
1447   assert(_signers_offset != 0, "must be set");
1448   java_class->obj_field_put(_signers_offset, (oop)signers);
1449 }
1450 
1451 oop java_lang_Class::class_data(oop java_class) {
1452   assert(_classData_offset != 0, "must be set");
1453   return java_class->obj_field(_classData_offset);
1454 }
1455 void java_lang_Class::set_class_data(oop java_class, oop class_data) {
1456   assert(_classData_offset != 0, "must be set");
1457   java_class->obj_field_put(_classData_offset, class_data);
1458 }
1459 
1460 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1461   assert(_class_loader_offset != 0, "offsets should have been initialized");
1462   java_class->obj_field_put(_class_loader_offset, loader);
1463 }
1464 
1465 oop java_lang_Class::class_loader(oop java_class) {
1466   assert(_class_loader_offset != 0, "must be set");
1467   return java_class->obj_field(_class_loader_offset);
1468 }
1469 
1470 oop java_lang_Class::module(oop java_class) {
1471   assert(_module_offset != 0, "must be set");
1472   return java_class->obj_field(_module_offset);
1473 }
1474 
1475 void java_lang_Class::set_module(oop java_class, oop module) {
1476   assert(_module_offset != 0, "must be set");
1477   java_class->obj_field_put(_module_offset, module);
1478 }
1479 
1480 oop java_lang_Class::name(Handle java_class, TRAPS) {
1481   assert(_name_offset != 0, "must be set");
1482   oop o = java_class->obj_field(_name_offset);
1483   if (o == NULL) {
1484     o = StringTable::intern(java_lang_Class::as_external_name(java_class()), THREAD);
1485     java_class->obj_field_put(_name_offset, o);
1486   }
1487   return o;
1488 }
1489 
1490 oop java_lang_Class::source_file(oop java_class) {
1491   assert(_source_file_offset != 0, "must be set");
1492   return java_class->obj_field(_source_file_offset);
1493 }
1494 
1495 void java_lang_Class::set_source_file(oop java_class, oop source_file) {
1496   assert(_source_file_offset != 0, "must be set");
1497   java_class->obj_field_put(_source_file_offset, source_file);
1498 }
1499 
1500 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1501   // This should be improved by adding a field at the Java level or by
1502   // introducing a new VM klass (see comment in ClassFileParser)
1503   oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_NULL);
1504   if (type != T_VOID) {
1505     Klass* aklass = Universe::typeArrayKlassObj(type);
1506     assert(aklass != NULL, "correct bootstrap");
1507     release_set_array_klass(java_class, aklass);
1508   }
1509 #ifdef ASSERT
1510   InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass());
1511   assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1512 #endif
1513   return java_class;
1514 }
1515 
1516 
1517 Klass* java_lang_Class::as_Klass_raw(oop java_class) {
1518   //%note memory_2
1519   assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1520   Klass* k = ((Klass*)java_class->metadata_field_raw(_klass_offset));
1521   assert(k == NULL || k->is_klass(), "type check");
1522   return k;
1523 }
1524 
1525 
1526 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1527   assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1528   java_class->metadata_field_put(_klass_offset, klass);
1529 }
1530 
1531 
1532 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1533   assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1534   Symbol* name = NULL;
1535   bool is_instance = false;
1536   if (is_primitive(java_class)) {
1537     name = vmSymbols::type_signature(primitive_type(java_class));
1538   } else {
1539     Klass* k = as_Klass(java_class);
1540     is_instance = k->is_instance_klass();
1541     name = k->name();
1542   }
1543   if (name == NULL) {
1544     st->print("<null>");
1545     return;
1546   }
1547   if (is_instance)  st->print("L");
1548   st->write((char*) name->base(), (int) name->utf8_length());
1549   if (is_instance)  st->print(";");
1550 }
1551 
1552 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) {
1553   assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1554   Symbol* name;
1555   if (is_primitive(java_class)) {
1556     name = vmSymbols::type_signature(primitive_type(java_class));
1557     // Because this can create a new symbol, the caller has to decrement
1558     // the refcount, so make adjustment here and below for symbols returned
1559     // that are not created or incremented due to a successful lookup.
1560     name->increment_refcount();
1561   } else {
1562     Klass* k = as_Klass(java_class);
1563     if (!k->is_instance_klass()) {
1564       name = k->name();
1565       name->increment_refcount();
1566     } else {
1567       ResourceMark rm;
1568       const char* sigstr = k->signature_name();
1569       int         siglen = (int) strlen(sigstr);
1570       if (!intern_if_not_found) {
1571         name = SymbolTable::probe(sigstr, siglen);
1572       } else {
1573         name = SymbolTable::new_symbol(sigstr, siglen);
1574       }
1575     }
1576   }
1577   return name;
1578 }
1579 
1580 // Returns the Java name for this Java mirror (Resource allocated)
1581 // See Klass::external_name().
1582 // For primitive type Java mirrors, its type name is returned.
1583 const char* java_lang_Class::as_external_name(oop java_class) {
1584   assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1585   const char* name = NULL;
1586   if (is_primitive(java_class)) {
1587     name = type2name(primitive_type(java_class));
1588   } else {
1589     name = as_Klass(java_class)->external_name();
1590   }
1591   if (name == NULL) {
1592     name = "<null>";
1593   }
1594   return name;
1595 }
1596 
1597 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1598   Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1599   assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass");
1600   return k;
1601 }
1602 
1603 
1604 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1605   assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1606   java_class->release_metadata_field_put(_array_klass_offset, klass);
1607 }
1608 
1609 
1610 BasicType java_lang_Class::primitive_type(oop java_class) {
1611   assert(java_lang_Class::is_primitive(java_class), "just checking");
1612   Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1613   BasicType type = T_VOID;
1614   if (ak != NULL) {
1615     // Note: create_basic_type_mirror above initializes ak to a non-null value.
1616     type = ArrayKlass::cast(ak)->element_type();
1617   } else {
1618     assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
1619   }
1620   assert(Universe::java_mirror(type) == java_class, "must be consistent");
1621   return type;
1622 }
1623 
1624 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1625   assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1626   if (is_primitive(java_class)) {
1627     if (reference_klass != NULL)
1628       (*reference_klass) = NULL;
1629     return primitive_type(java_class);
1630   } else {
1631     if (reference_klass != NULL)
1632       (*reference_klass) = as_Klass(java_class);
1633     return T_OBJECT;
1634   }
1635 }
1636 
1637 
1638 oop java_lang_Class::primitive_mirror(BasicType t) {
1639   oop mirror = Universe::java_mirror(t);
1640   assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
1641   assert(java_lang_Class::is_primitive(mirror), "must be primitive");
1642   return mirror;
1643 }
1644 
1645 #define CLASS_FIELDS_DO(macro) \
1646   macro(_classRedefinedCount_offset, k, "classRedefinedCount", int_signature,         false); \
1647   macro(_class_loader_offset,        k, "classLoader",         classloader_signature, false); \
1648   macro(_component_mirror_offset,    k, "componentType",       class_signature,       false); \
1649   macro(_module_offset,              k, "module",              module_signature,      false); \
1650   macro(_name_offset,                k, "name",                string_signature,      false); \
1651   macro(_classData_offset,           k, "classData",           object_signature,      false);
1652 
1653 void java_lang_Class::compute_offsets() {
1654   if (_offsets_computed) {
1655     return;
1656   }
1657 
1658   _offsets_computed = true;
1659 
1660   InstanceKlass* k = SystemDictionary::Class_klass();
1661   CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1662 
1663   // Init lock is a C union with component_mirror.  Only instanceKlass mirrors have
1664   // init_lock and only ArrayKlass mirrors have component_mirror.  Since both are oops
1665   // GC treats them the same.
1666   _init_lock_offset = _component_mirror_offset;
1667 
1668   CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1669 }
1670 
1671 #if INCLUDE_CDS
1672 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1673   f->do_bool(&_offsets_computed);
1674   f->do_u4((u4*)&_init_lock_offset);
1675 
1676   CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1677 
1678   CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1679 }
1680 #endif
1681 
1682 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1683   assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1684   return the_class_mirror->int_field(_classRedefinedCount_offset);
1685 }
1686 
1687 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1688   assert(_classRedefinedCount_offset != 0, "offsets should have been initialized");
1689   the_class_mirror->int_field_put(_classRedefinedCount_offset, value);
1690 }
1691 
1692 
1693 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1694 //       platform thread structure, and a eetop offset which was used for thread
1695 //       local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1696 //       merged, so in the HotSpot VM we just use the eetop field for the thread
1697 //       instead of the privateInfo_offset.
1698 //
1699 // Note: The stackSize field is only present starting in 1.4.
1700 
1701 int java_lang_Thread::_name_offset;
1702 int java_lang_Thread::_group_offset;
1703 int java_lang_Thread::_contextClassLoader_offset;
1704 int java_lang_Thread::_inheritedAccessControlContext_offset;
1705 int java_lang_Thread::_priority_offset;
1706 int java_lang_Thread::_eetop_offset;
1707 int java_lang_Thread::_interrupted_offset;
1708 int java_lang_Thread::_daemon_offset;
1709 int java_lang_Thread::_stillborn_offset;
1710 int java_lang_Thread::_stackSize_offset;
1711 int java_lang_Thread::_tid_offset;
1712 int java_lang_Thread::_thread_status_offset;
1713 int java_lang_Thread::_park_blocker_offset;
1714 
1715 #define THREAD_FIELDS_DO(macro) \
1716   macro(_name_offset,          k, vmSymbols::name_name(), string_signature, false); \
1717   macro(_group_offset,         k, vmSymbols::group_name(), threadgroup_signature, false); \
1718   macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \
1719   macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \
1720   macro(_priority_offset,      k, vmSymbols::priority_name(), int_signature, false); \
1721   macro(_daemon_offset,        k, vmSymbols::daemon_name(), bool_signature, false); \
1722   macro(_eetop_offset,         k, "eetop", long_signature, false); \
1723   macro(_interrupted_offset,   k, "interrupted", bool_signature, false); \
1724   macro(_stillborn_offset,     k, "stillborn", bool_signature, false); \
1725   macro(_stackSize_offset,     k, "stackSize", long_signature, false); \
1726   macro(_tid_offset,           k, "tid", long_signature, false); \
1727   macro(_thread_status_offset, k, "threadStatus", int_signature, false); \
1728   macro(_park_blocker_offset,  k, "parkBlocker", object_signature, false)
1729 
1730 void java_lang_Thread::compute_offsets() {
1731   assert(_group_offset == 0, "offsets should be initialized only once");
1732 
1733   InstanceKlass* k = SystemDictionary::Thread_klass();
1734   THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1735 }
1736 
1737 #if INCLUDE_CDS
1738 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1739   THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1740 }
1741 #endif
1742 
1743 JavaThread* java_lang_Thread::thread(oop java_thread) {
1744   return (JavaThread*)java_thread->address_field(_eetop_offset);
1745 }
1746 
1747 
1748 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1749   java_thread->address_field_put(_eetop_offset, (address)thread);
1750 }
1751 
1752 bool java_lang_Thread::interrupted(oop java_thread) {
1753   // Make sure the caller can safely access oops.
1754   assert(Thread::current()->is_VM_thread() ||
1755          (JavaThread::current()->thread_state() != _thread_blocked &&
1756           JavaThread::current()->thread_state() != _thread_in_native),
1757          "Unsafe access to oop");
1758   return java_thread->bool_field_volatile(_interrupted_offset);
1759 }
1760 
1761 void java_lang_Thread::set_interrupted(oop java_thread, bool val) {
1762   // Make sure the caller can safely access oops.
1763   assert(Thread::current()->is_VM_thread() ||
1764          (JavaThread::current()->thread_state() != _thread_blocked &&
1765           JavaThread::current()->thread_state() != _thread_in_native),
1766          "Unsafe access to oop");
1767   java_thread->bool_field_put_volatile(_interrupted_offset, val);
1768 }
1769 
1770 
1771 oop java_lang_Thread::name(oop java_thread) {
1772   return java_thread->obj_field(_name_offset);
1773 }
1774 
1775 
1776 void java_lang_Thread::set_name(oop java_thread, oop name) {
1777   java_thread->obj_field_put(_name_offset, name);
1778 }
1779 
1780 
1781 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1782   return (ThreadPriority)java_thread->int_field(_priority_offset);
1783 }
1784 
1785 
1786 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1787   java_thread->int_field_put(_priority_offset, priority);
1788 }
1789 
1790 
1791 oop java_lang_Thread::threadGroup(oop java_thread) {
1792   return java_thread->obj_field(_group_offset);
1793 }
1794 
1795 
1796 bool java_lang_Thread::is_stillborn(oop java_thread) {
1797   return java_thread->bool_field(_stillborn_offset) != 0;
1798 }
1799 
1800 
1801 // We never have reason to turn the stillborn bit off
1802 void java_lang_Thread::set_stillborn(oop java_thread) {
1803   java_thread->bool_field_put(_stillborn_offset, true);
1804 }
1805 
1806 
1807 bool java_lang_Thread::is_alive(oop java_thread) {
1808   JavaThread* thr = java_lang_Thread::thread(java_thread);
1809   return (thr != NULL);
1810 }
1811 
1812 
1813 bool java_lang_Thread::is_daemon(oop java_thread) {
1814   return java_thread->bool_field(_daemon_offset) != 0;
1815 }
1816 
1817 
1818 void java_lang_Thread::set_daemon(oop java_thread) {
1819   java_thread->bool_field_put(_daemon_offset, true);
1820 }
1821 
1822 oop java_lang_Thread::context_class_loader(oop java_thread) {
1823   return java_thread->obj_field(_contextClassLoader_offset);
1824 }
1825 
1826 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1827   return java_thread->obj_field(_inheritedAccessControlContext_offset);
1828 }
1829 
1830 
1831 jlong java_lang_Thread::stackSize(oop java_thread) {
1832   return java_thread->long_field(_stackSize_offset);
1833 }
1834 
1835 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1836 void java_lang_Thread::set_thread_status(oop java_thread,
1837                                          java_lang_Thread::ThreadStatus status) {
1838   java_thread->int_field_put(_thread_status_offset, status);
1839 }
1840 
1841 // Read thread status value from threadStatus field in java.lang.Thread java class.
1842 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1843   // Make sure the caller is operating on behalf of the VM or is
1844   // running VM code (state == _thread_in_vm).
1845   assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1846          JavaThread::current()->thread_state() == _thread_in_vm,
1847          "Java Thread is not running in vm");
1848   return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1849 }
1850 
1851 
1852 jlong java_lang_Thread::thread_id(oop java_thread) {
1853   return java_thread->long_field(_tid_offset);
1854 }
1855 
1856 oop java_lang_Thread::park_blocker(oop java_thread) {
1857   return java_thread->obj_field(_park_blocker_offset);
1858 }
1859 
1860 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1861   ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1862   switch (status) {
1863     case NEW                      : return "NEW";
1864     case RUNNABLE                 : return "RUNNABLE";
1865     case SLEEPING                 : return "TIMED_WAITING (sleeping)";
1866     case IN_OBJECT_WAIT           : return "WAITING (on object monitor)";
1867     case IN_OBJECT_WAIT_TIMED     : return "TIMED_WAITING (on object monitor)";
1868     case PARKED                   : return "WAITING (parking)";
1869     case PARKED_TIMED             : return "TIMED_WAITING (parking)";
1870     case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1871     case TERMINATED               : return "TERMINATED";
1872     default                       : return "UNKNOWN";
1873   };
1874 }
1875 int java_lang_ThreadGroup::_parent_offset;
1876 int java_lang_ThreadGroup::_name_offset;
1877 int java_lang_ThreadGroup::_threads_offset;
1878 int java_lang_ThreadGroup::_groups_offset;
1879 int java_lang_ThreadGroup::_maxPriority_offset;
1880 int java_lang_ThreadGroup::_destroyed_offset;
1881 int java_lang_ThreadGroup::_daemon_offset;
1882 int java_lang_ThreadGroup::_nthreads_offset;
1883 int java_lang_ThreadGroup::_ngroups_offset;
1884 
1885 oop  java_lang_ThreadGroup::parent(oop java_thread_group) {
1886   assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1887   return java_thread_group->obj_field(_parent_offset);
1888 }
1889 
1890 // ("name as oop" accessor is not necessary)
1891 
1892 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
1893   oop name = java_thread_group->obj_field(_name_offset);
1894   // ThreadGroup.name can be null
1895   if (name != NULL) {
1896     return java_lang_String::as_utf8_string(name);
1897   }
1898   return NULL;
1899 }
1900 
1901 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1902   assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1903   return java_thread_group->int_field(_nthreads_offset);
1904 }
1905 
1906 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1907   oop threads = java_thread_group->obj_field(_threads_offset);
1908   assert(threads != NULL, "threadgroups should have threads");
1909   assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1910   return objArrayOop(threads);
1911 }
1912 
1913 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1914   assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1915   return java_thread_group->int_field(_ngroups_offset);
1916 }
1917 
1918 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1919   oop groups = java_thread_group->obj_field(_groups_offset);
1920   assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1921   return objArrayOop(groups);
1922 }
1923 
1924 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1925   assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1926   return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1927 }
1928 
1929 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1930   assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1931   return java_thread_group->bool_field(_destroyed_offset) != 0;
1932 }
1933 
1934 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1935   assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1936   return java_thread_group->bool_field(_daemon_offset) != 0;
1937 }
1938 
1939 #define THREADGROUP_FIELDS_DO(macro) \
1940   macro(_parent_offset,      k, vmSymbols::parent_name(),      threadgroup_signature,       false); \
1941   macro(_name_offset,        k, vmSymbols::name_name(),        string_signature,            false); \
1942   macro(_threads_offset,     k, vmSymbols::threads_name(),     thread_array_signature,      false); \
1943   macro(_groups_offset,      k, vmSymbols::groups_name(),      threadgroup_array_signature, false); \
1944   macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature,               false); \
1945   macro(_destroyed_offset,   k, vmSymbols::destroyed_name(),   bool_signature,              false); \
1946   macro(_daemon_offset,      k, vmSymbols::daemon_name(),      bool_signature,              false); \
1947   macro(_nthreads_offset,    k, vmSymbols::nthreads_name(),    int_signature,               false); \
1948   macro(_ngroups_offset,     k, vmSymbols::ngroups_name(),     int_signature,               false)
1949 
1950 void java_lang_ThreadGroup::compute_offsets() {
1951   assert(_parent_offset == 0, "offsets should be initialized only once");
1952 
1953   InstanceKlass* k = SystemDictionary::ThreadGroup_klass();
1954   THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1955 }
1956 
1957 #if INCLUDE_CDS
1958 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
1959   THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1960 }
1961 #endif
1962 
1963 // java_lang_Throwable
1964 
1965 int java_lang_Throwable::_backtrace_offset;
1966 int java_lang_Throwable::_detailMessage_offset;
1967 int java_lang_Throwable::_stackTrace_offset;
1968 int java_lang_Throwable::_depth_offset;
1969 int java_lang_Throwable::_static_unassigned_stacktrace_offset;
1970 
1971 #define THROWABLE_FIELDS_DO(macro) \
1972   macro(_backtrace_offset,     k, "backtrace",     object_signature,                  false); \
1973   macro(_detailMessage_offset, k, "detailMessage", string_signature,                  false); \
1974   macro(_stackTrace_offset,    k, "stackTrace",    java_lang_StackTraceElement_array, false); \
1975   macro(_depth_offset,         k, "depth",         int_signature,                     false); \
1976   macro(_static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
1977 
1978 void java_lang_Throwable::compute_offsets() {
1979   InstanceKlass* k = SystemDictionary::Throwable_klass();
1980   THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1981 }
1982 
1983 #if INCLUDE_CDS
1984 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
1985   THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1986 }
1987 #endif
1988 
1989 oop java_lang_Throwable::unassigned_stacktrace() {
1990   InstanceKlass* ik = SystemDictionary::Throwable_klass();
1991   oop base = ik->static_field_base_raw();
1992   return base->obj_field(_static_unassigned_stacktrace_offset);
1993 }
1994 
1995 oop java_lang_Throwable::backtrace(oop throwable) {
1996   return throwable->obj_field_acquire(_backtrace_offset);
1997 }
1998 
1999 
2000 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
2001   throwable->release_obj_field_put(_backtrace_offset, value);
2002 }
2003 
2004 int java_lang_Throwable::depth(oop throwable) {
2005   return throwable->int_field(_depth_offset);
2006 }
2007 
2008 void java_lang_Throwable::set_depth(oop throwable, int value) {
2009   throwable->int_field_put(_depth_offset, value);
2010 }
2011 
2012 oop java_lang_Throwable::message(oop throwable) {
2013   return throwable->obj_field(_detailMessage_offset);
2014 }
2015 
2016 
2017 // Return Symbol for detailed_message or NULL
2018 Symbol* java_lang_Throwable::detail_message(oop throwable) {
2019   PRESERVE_EXCEPTION_MARK;  // Keep original exception
2020   oop detailed_message = java_lang_Throwable::message(throwable);
2021   if (detailed_message != NULL) {
2022     return java_lang_String::as_symbol(detailed_message);
2023   }
2024   return NULL;
2025 }
2026 
2027 void java_lang_Throwable::set_message(oop throwable, oop value) {
2028   throwable->obj_field_put(_detailMessage_offset, value);
2029 }
2030 
2031 
2032 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
2033   throwable->obj_field_put(_stackTrace_offset, st_element_array);
2034 }
2035 
2036 void java_lang_Throwable::clear_stacktrace(oop throwable) {
2037   set_stacktrace(throwable, NULL);
2038 }
2039 
2040 
2041 void java_lang_Throwable::print(oop throwable, outputStream* st) {
2042   ResourceMark rm;
2043   Klass* k = throwable->klass();
2044   assert(k != NULL, "just checking");
2045   st->print("%s", k->external_name());
2046   oop msg = message(throwable);
2047   if (msg != NULL) {
2048     st->print(": %s", java_lang_String::as_utf8_string(msg));
2049   }
2050 }
2051 
2052 // After this many redefines, the stack trace is unreliable.
2053 const int MAX_VERSION = USHRT_MAX;
2054 
2055 static inline bool version_matches(Method* method, int version) {
2056   assert(version < MAX_VERSION, "version is too big");
2057   return method != NULL && (method->constants()->version() == version);
2058 }
2059 
2060 // This class provides a simple wrapper over the internal structure of
2061 // exception backtrace to insulate users of the backtrace from needing
2062 // to know what it looks like.
2063 // The code of this class is not GC safe. Allocations can only happen
2064 // in expand().
2065 class BacktraceBuilder: public StackObj {
2066  friend class BacktraceIterator;
2067  private:
2068   Handle          _backtrace;
2069   objArrayOop     _head;
2070   typeArrayOop    _methods;
2071   typeArrayOop    _bcis;
2072   objArrayOop     _mirrors;
2073   typeArrayOop    _names; // Needed to insulate method name against redefinition.
2074   // True if the top frame of the backtrace is omitted because it shall be hidden.
2075   bool            _has_hidden_top_frame;
2076   int             _index;
2077   NoSafepointVerifier _nsv;
2078 
2079   enum {
2080     trace_methods_offset = java_lang_Throwable::trace_methods_offset,
2081     trace_bcis_offset    = java_lang_Throwable::trace_bcis_offset,
2082     trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
2083     trace_names_offset   = java_lang_Throwable::trace_names_offset,
2084     trace_next_offset    = java_lang_Throwable::trace_next_offset,
2085     trace_hidden_offset  = java_lang_Throwable::trace_hidden_offset,
2086     trace_size           = java_lang_Throwable::trace_size,
2087     trace_chunk_size     = java_lang_Throwable::trace_chunk_size
2088   };
2089 
2090   // get info out of chunks
2091   static typeArrayOop get_methods(objArrayHandle chunk) {
2092     typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
2093     assert(methods != NULL, "method array should be initialized in backtrace");
2094     return methods;
2095   }
2096   static typeArrayOop get_bcis(objArrayHandle chunk) {
2097     typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
2098     assert(bcis != NULL, "bci array should be initialized in backtrace");
2099     return bcis;
2100   }
2101   static objArrayOop get_mirrors(objArrayHandle chunk) {
2102     objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
2103     assert(mirrors != NULL, "mirror array should be initialized in backtrace");
2104     return mirrors;
2105   }
2106   static typeArrayOop get_names(objArrayHandle chunk) {
2107     typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
2108     assert(names != NULL, "names array should be initialized in backtrace");
2109     return names;
2110   }
2111   static bool has_hidden_top_frame(objArrayHandle chunk) {
2112     oop hidden = chunk->obj_at(trace_hidden_offset);
2113     return hidden != NULL;
2114   }
2115 
2116  public:
2117 
2118   // constructor for new backtrace
2119   BacktraceBuilder(TRAPS): _head(NULL), _methods(NULL), _bcis(NULL), _mirrors(NULL), _names(NULL), _has_hidden_top_frame(false) {
2120     expand(CHECK);
2121     _backtrace = Handle(THREAD, _head);
2122     _index = 0;
2123   }
2124 
2125   BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
2126     _methods = get_methods(backtrace);
2127     _bcis = get_bcis(backtrace);
2128     _mirrors = get_mirrors(backtrace);
2129     _names = get_names(backtrace);
2130     _has_hidden_top_frame = has_hidden_top_frame(backtrace);
2131     assert(_methods->length() == _bcis->length() &&
2132            _methods->length() == _mirrors->length() &&
2133            _mirrors->length() == _names->length(),
2134            "method and source information arrays should match");
2135 
2136     // head is the preallocated backtrace
2137     _head = backtrace();
2138     _backtrace = Handle(thread, _head);
2139     _index = 0;
2140   }
2141 
2142   void expand(TRAPS) {
2143     objArrayHandle old_head(THREAD, _head);
2144     PauseNoSafepointVerifier pnsv(&_nsv);
2145 
2146     objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2147     objArrayHandle new_head(THREAD, head);
2148 
2149     typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2150     typeArrayHandle new_methods(THREAD, methods);
2151 
2152     typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2153     typeArrayHandle new_bcis(THREAD, bcis);
2154 
2155     objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2156     objArrayHandle new_mirrors(THREAD, mirrors);
2157 
2158     typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2159     typeArrayHandle new_names(THREAD, names);
2160 
2161     if (!old_head.is_null()) {
2162       old_head->obj_at_put(trace_next_offset, new_head());
2163     }
2164     new_head->obj_at_put(trace_methods_offset, new_methods());
2165     new_head->obj_at_put(trace_bcis_offset, new_bcis());
2166     new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2167     new_head->obj_at_put(trace_names_offset, new_names());
2168     new_head->obj_at_put(trace_hidden_offset, NULL);
2169 
2170     _head    = new_head();
2171     _methods = new_methods();
2172     _bcis = new_bcis();
2173     _mirrors = new_mirrors();
2174     _names  = new_names();
2175     _index = 0;
2176   }
2177 
2178   oop backtrace() {
2179     return _backtrace();
2180   }
2181 
2182   inline void push(Method* method, int bci, TRAPS) {
2183     // Smear the -1 bci to 0 since the array only holds unsigned
2184     // shorts.  The later line number lookup would just smear the -1
2185     // to a 0 even if it could be recorded.
2186     if (bci == SynchronizationEntryBCI) bci = 0;
2187 
2188     if (_index >= trace_chunk_size) {
2189       methodHandle mhandle(THREAD, method);
2190       expand(CHECK);
2191       method = mhandle();
2192     }
2193 
2194     _methods->ushort_at_put(_index, method->orig_method_idnum());
2195     _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2196 
2197     // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2198     // klass owning the symbols alive so their refcounts aren't decremented.
2199     Symbol* name = method->name();
2200     _names->symbol_at_put(_index, name);
2201 
2202     // We need to save the mirrors in the backtrace to keep the class
2203     // from being unloaded while we still have this stack trace.
2204     assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
2205     _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2206     _index++;
2207   }
2208 
2209   void set_has_hidden_top_frame(TRAPS) {
2210     if (!_has_hidden_top_frame) {
2211       // It would be nice to add java/lang/Boolean::TRUE here
2212       // to indicate that this backtrace has a hidden top frame.
2213       // But this code is used before TRUE is allocated.
2214       // Therefore let's just use an arbitrary legal oop
2215       // available right here. _methods is a short[].
2216       assert(_methods != NULL, "we need a legal oop");
2217       _has_hidden_top_frame = true;
2218       _head->obj_at_put(trace_hidden_offset, _methods);
2219     }
2220   }
2221 };
2222 
2223 struct BacktraceElement : public StackObj {
2224   int _method_id;
2225   int _bci;
2226   int _version;
2227   Symbol* _name;
2228   Handle _mirror;
2229   BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2230                    _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2231 };
2232 
2233 class BacktraceIterator : public StackObj {
2234   int _index;
2235   objArrayHandle  _result;
2236   objArrayHandle  _mirrors;
2237   typeArrayHandle _methods;
2238   typeArrayHandle _bcis;
2239   typeArrayHandle _names;
2240 
2241   void init(objArrayHandle result, Thread* thread) {
2242     // Get method id, bci, version and mirror from chunk
2243     _result = result;
2244     if (_result.not_null()) {
2245       _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2246       _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2247       _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2248       _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2249       _index = 0;
2250     }
2251   }
2252  public:
2253   BacktraceIterator(objArrayHandle result, Thread* thread) {
2254     init(result, thread);
2255     assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2256   }
2257 
2258   BacktraceElement next(Thread* thread) {
2259     BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2260                         _methods->ushort_at(_index),
2261                         Backtrace::version_at(_bcis->int_at(_index)),
2262                         Backtrace::bci_at(_bcis->int_at(_index)),
2263                         _names->symbol_at(_index));
2264     _index++;
2265 
2266     if (_index >= java_lang_Throwable::trace_chunk_size) {
2267       int next_offset = java_lang_Throwable::trace_next_offset;
2268       // Get next chunk
2269       objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2270       init(result, thread);
2271     }
2272     return e;
2273   }
2274 
2275   bool repeat() {
2276     return _result.not_null() && _mirrors->obj_at(_index) != NULL;
2277   }
2278 };
2279 
2280 
2281 // Print stack trace element to resource allocated buffer
2282 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2283                                           int version, int bci, Symbol* name) {
2284   ResourceMark rm;
2285 
2286   // Get strings and string lengths
2287   InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2288   const char* klass_name  = holder->external_name();
2289   int buf_len = (int)strlen(klass_name);
2290 
2291   char* method_name = name->as_C_string();
2292   buf_len += (int)strlen(method_name);
2293 
2294   char* source_file_name = NULL;
2295   Symbol* source = Backtrace::get_source_file_name(holder, version);
2296   if (source != NULL) {
2297     source_file_name = source->as_C_string();
2298     buf_len += (int)strlen(source_file_name);
2299   }
2300 
2301   char *module_name = NULL, *module_version = NULL;
2302   ModuleEntry* module = holder->module();
2303   if (module->is_named()) {
2304     module_name = module->name()->as_C_string();
2305     buf_len += (int)strlen(module_name);
2306     if (module->version() != NULL) {
2307       module_version = module->version()->as_C_string();
2308       buf_len += (int)strlen(module_version);
2309     }
2310   }
2311 
2312   // Allocate temporary buffer with extra space for formatting and line number
2313   char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
2314 
2315   // Print stack trace line in buffer
2316   sprintf(buf, "\tat %s.%s(", klass_name, method_name);
2317 
2318   // Print module information
2319   if (module_name != NULL) {
2320     if (module_version != NULL) {
2321       sprintf(buf + (int)strlen(buf), "%s@%s/", module_name, module_version);
2322     } else {
2323       sprintf(buf + (int)strlen(buf), "%s/", module_name);
2324     }
2325   }
2326 
2327   // The method can be NULL if the requested class version is gone
2328   Method* method = holder->method_with_orig_idnum(method_id, version);
2329   if (!version_matches(method, version)) {
2330     strcat(buf, "Redefined)");
2331   } else {
2332     int line_number = Backtrace::get_line_number(method, bci);
2333     if (line_number == -2) {
2334       strcat(buf, "Native Method)");
2335     } else {
2336       if (source_file_name != NULL && (line_number != -1)) {
2337         // Sourcename and linenumber
2338         sprintf(buf + (int)strlen(buf), "%s:%d)", source_file_name, line_number);
2339       } else if (source_file_name != NULL) {
2340         // Just sourcename
2341         sprintf(buf + (int)strlen(buf), "%s)", source_file_name);
2342       } else {
2343         // Neither sourcename nor linenumber
2344         sprintf(buf + (int)strlen(buf), "Unknown Source)");
2345       }
2346       CompiledMethod* nm = method->code();
2347       if (WizardMode && nm != NULL) {
2348         sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
2349       }
2350     }
2351   }
2352 
2353   st->print_cr("%s", buf);
2354 }
2355 
2356 void java_lang_Throwable::print_stack_element(outputStream *st, Method* method, int bci) {
2357   Handle mirror (Thread::current(),  method->method_holder()->java_mirror());
2358   int method_id = method->orig_method_idnum();
2359   int version = method->constants()->version();
2360   print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2361 }
2362 
2363 /**
2364  * Print the throwable message and its stack trace plus all causes by walking the
2365  * cause chain.  The output looks the same as of Throwable.printStackTrace().
2366  */
2367 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2368   // First, print the message.
2369   print(throwable(), st);
2370   st->cr();
2371 
2372   // Now print the stack trace.
2373   Thread* THREAD = Thread::current();
2374   while (throwable.not_null()) {
2375     objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2376     if (result.is_null()) {
2377       st->print_raw_cr("\t<<no stack trace available>>");
2378       return;
2379     }
2380     BacktraceIterator iter(result, THREAD);
2381 
2382     while (iter.repeat()) {
2383       BacktraceElement bte = iter.next(THREAD);
2384       print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2385     }
2386     {
2387       // Call getCause() which doesn't necessarily return the _cause field.
2388       EXCEPTION_MARK;
2389       JavaValue cause(T_OBJECT);
2390       JavaCalls::call_virtual(&cause,
2391                               throwable,
2392                               throwable->klass(),
2393                               vmSymbols::getCause_name(),
2394                               vmSymbols::void_throwable_signature(),
2395                               THREAD);
2396       // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2397       if (HAS_PENDING_EXCEPTION) {
2398         CLEAR_PENDING_EXCEPTION;
2399         throwable = Handle();
2400       } else {
2401         throwable = Handle(THREAD, (oop) cause.get_jobject());
2402         if (throwable.not_null()) {
2403           st->print("Caused by: ");
2404           print(throwable(), st);
2405           st->cr();
2406         }
2407       }
2408     }
2409   }
2410 }
2411 
2412 /**
2413  * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2414  */
2415 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2416   assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected");
2417   JavaValue result(T_VOID);
2418   JavaCalls::call_virtual(&result,
2419                           throwable,
2420                           SystemDictionary::Throwable_klass(),
2421                           vmSymbols::printStackTrace_name(),
2422                           vmSymbols::void_method_signature(),
2423                           THREAD);
2424 }
2425 
2426 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2427   if (!StackTraceInThrowable) return;
2428   ResourceMark rm(THREAD);
2429 
2430   // Start out by clearing the backtrace for this object, in case the VM
2431   // runs out of memory while allocating the stack trace
2432   set_backtrace(throwable(), NULL);
2433   // Clear lazily constructed Java level stacktrace if refilling occurs
2434   // This is unnecessary in 1.7+ but harmless
2435   clear_stacktrace(throwable());
2436 
2437   int max_depth = MaxJavaStackTraceDepth;
2438   JavaThread* thread = (JavaThread*)THREAD;
2439 
2440   BacktraceBuilder bt(CHECK);
2441 
2442   // If there is no Java frame just return the method that was being called
2443   // with bci 0
2444   if (!thread->has_last_Java_frame()) {
2445     if (max_depth >= 1 && method() != NULL) {
2446       bt.push(method(), 0, CHECK);
2447       log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2448       set_depth(throwable(), 1);
2449       set_backtrace(throwable(), bt.backtrace());
2450     }
2451     return;
2452   }
2453 
2454   // Instead of using vframe directly, this version of fill_in_stack_trace
2455   // basically handles everything by hand. This significantly improved the
2456   // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2457   // See bug 6333838 for  more details.
2458   // The "ASSERT" here is to verify this method generates the exactly same stack
2459   // trace as utilizing vframe.
2460 #ifdef ASSERT
2461   vframeStream st(thread);
2462 #endif
2463   int total_count = 0;
2464   RegisterMap map(thread, false);
2465   int decode_offset = 0;
2466   CompiledMethod* nm = NULL;
2467   bool skip_fillInStackTrace_check = false;
2468   bool skip_throwableInit_check = false;
2469   bool skip_hidden = !ShowHiddenFrames;
2470 
2471   for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2472     Method* method = NULL;
2473     int bci = 0;
2474 
2475     // Compiled java method case.
2476     if (decode_offset != 0) {
2477       DebugInfoReadStream stream(nm, decode_offset);
2478       decode_offset = stream.read_int();
2479       method = (Method*)nm->metadata_at(stream.read_int());
2480       bci = stream.read_bci();
2481     } else {
2482       if (fr.is_first_frame()) break;
2483       address pc = fr.pc();
2484       if (fr.is_interpreted_frame()) {
2485         address bcp = fr.interpreter_frame_bcp();
2486         method = fr.interpreter_frame_method();
2487         bci =  method->bci_from(bcp);
2488         fr = fr.sender(&map);
2489       } else {
2490         CodeBlob* cb = fr.cb();
2491         // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
2492         // but non nmethod
2493         fr = fr.sender(&map);
2494         if (cb == NULL || !cb->is_compiled()) {
2495           continue;
2496         }
2497         nm = cb->as_compiled_method();
2498         if (nm->method()->is_native()) {
2499           method = nm->method();
2500           bci = 0;
2501         } else {
2502           PcDesc* pd = nm->pc_desc_at(pc);
2503           decode_offset = pd->scope_decode_offset();
2504           // if decode_offset is not equal to 0, it will execute the
2505           // "compiled java method case" at the beginning of the loop.
2506           continue;
2507         }
2508       }
2509     }
2510 #ifdef ASSERT
2511     assert(st.method() == method && st.bci() == bci,
2512            "Wrong stack trace");
2513     st.next();
2514 #endif
2515 
2516     // the format of the stacktrace will be:
2517     // - 1 or more fillInStackTrace frames for the exception class (skipped)
2518     // - 0 or more <init> methods for the exception class (skipped)
2519     // - rest of the stack
2520 
2521     if (!skip_fillInStackTrace_check) {
2522       if (method->name() == vmSymbols::fillInStackTrace_name() &&
2523           throwable->is_a(method->method_holder())) {
2524         continue;
2525       }
2526       else {
2527         skip_fillInStackTrace_check = true; // gone past them all
2528       }
2529     }
2530     if (!skip_throwableInit_check) {
2531       assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2532 
2533       // skip <init> methods of the exception class and superclasses
2534       // This is simlar to classic VM.
2535       if (method->name() == vmSymbols::object_initializer_name() &&
2536           throwable->is_a(method->method_holder())) {
2537         continue;
2538       } else {
2539         // there are none or we've seen them all - either way stop checking
2540         skip_throwableInit_check = true;
2541       }
2542     }
2543     if (method->is_hidden()) {
2544       if (skip_hidden) {
2545         if (total_count == 0) {
2546           // The top frame will be hidden from the stack trace.
2547           bt.set_has_hidden_top_frame(CHECK);
2548         }
2549         continue;
2550       }
2551     }
2552     bt.push(method, bci, CHECK);
2553     total_count++;
2554   }
2555 
2556   log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2557 
2558   // Put completed stack trace into throwable object
2559   set_backtrace(throwable(), bt.backtrace());
2560   set_depth(throwable(), total_count);
2561 }
2562 
2563 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2564   // No-op if stack trace is disabled
2565   if (!StackTraceInThrowable) {
2566     return;
2567   }
2568 
2569   // Disable stack traces for some preallocated out of memory errors
2570   if (!Universe::should_fill_in_stack_trace(throwable)) {
2571     return;
2572   }
2573 
2574   PRESERVE_EXCEPTION_MARK;
2575 
2576   JavaThread* thread = JavaThread::active();
2577   fill_in_stack_trace(throwable, method, thread);
2578   // ignore exceptions thrown during stack trace filling
2579   CLEAR_PENDING_EXCEPTION;
2580 }
2581 
2582 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2583   // Allocate stack trace - backtrace is created but not filled in
2584 
2585   // No-op if stack trace is disabled
2586   if (!StackTraceInThrowable) return;
2587   BacktraceBuilder bt(CHECK);   // creates a backtrace
2588   set_backtrace(throwable(), bt.backtrace());
2589 }
2590 
2591 
2592 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2593   // Fill in stack trace into preallocated backtrace (no GC)
2594 
2595   // No-op if stack trace is disabled
2596   if (!StackTraceInThrowable) return;
2597 
2598   assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
2599 
2600   JavaThread* THREAD = JavaThread::current();
2601 
2602   objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2603   assert(backtrace.not_null(), "backtrace should have been preallocated");
2604 
2605   ResourceMark rm(THREAD);
2606   vframeStream st(THREAD);
2607 
2608   BacktraceBuilder bt(THREAD, backtrace);
2609 
2610   // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2611   // methods as preallocated errors aren't created by "java" code.
2612 
2613   // fill in as much stack trace as possible
2614   int chunk_count = 0;
2615   for (;!st.at_end(); st.next()) {
2616     bt.push(st.method(), st.bci(), CHECK);
2617     chunk_count++;
2618 
2619     // Bail-out for deep stacks
2620     if (chunk_count >= trace_chunk_size) break;
2621   }
2622   set_depth(throwable(), chunk_count);
2623   log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2624 
2625   // We support the Throwable immutability protocol defined for Java 7.
2626   java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2627   assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
2628 }
2629 
2630 void java_lang_Throwable::get_stack_trace_elements(Handle throwable,
2631                                                    objArrayHandle stack_trace_array_h, TRAPS) {
2632 
2633   if (throwable.is_null() || stack_trace_array_h.is_null()) {
2634     THROW(vmSymbols::java_lang_NullPointerException());
2635   }
2636 
2637   assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2638 
2639   if (stack_trace_array_h->length() != depth(throwable())) {
2640     THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2641   }
2642 
2643   objArrayHandle result(THREAD, objArrayOop(backtrace(throwable())));
2644   BacktraceIterator iter(result, THREAD);
2645 
2646   int index = 0;
2647   while (iter.repeat()) {
2648     BacktraceElement bte = iter.next(THREAD);
2649 
2650     Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2651 
2652     if (stack_trace_element.is_null()) {
2653       THROW(vmSymbols::java_lang_NullPointerException());
2654     }
2655 
2656     InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2657     methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2658 
2659     java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2660                                          method,
2661                                          bte._version,
2662                                          bte._bci,
2663                                          bte._name, CHECK);
2664   }
2665 }
2666 
2667 bool java_lang_Throwable::get_top_method_and_bci(oop throwable, Method** method, int* bci) {
2668   Thread* THREAD = Thread::current();
2669   objArrayHandle result(THREAD, objArrayOop(backtrace(throwable)));
2670   BacktraceIterator iter(result, THREAD);
2671   // No backtrace available.
2672   if (!iter.repeat()) return false;
2673 
2674   // If the exception happened in a frame that has been hidden, i.e.,
2675   // omitted from the back trace, we can not compute the message.
2676   oop hidden = ((objArrayOop)backtrace(throwable))->obj_at(trace_hidden_offset);
2677   if (hidden != NULL) {
2678     return false;
2679   }
2680 
2681   // Get first backtrace element.
2682   BacktraceElement bte = iter.next(THREAD);
2683 
2684   InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2685   assert(holder != NULL, "first element should be non-null");
2686   Method* m = holder->method_with_orig_idnum(bte._method_id, bte._version);
2687 
2688   // Original version is no longer available.
2689   if (m == NULL || !version_matches(m, bte._version)) {
2690     return false;
2691   }
2692 
2693   *method = m;
2694   *bci = bte._bci;
2695   return true;
2696 }
2697 
2698 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
2699   // Allocate java.lang.StackTraceElement instance
2700   InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
2701   assert(k != NULL, "must be loaded in 1.4+");
2702   if (k->should_be_initialized()) {
2703     k->initialize(CHECK_NULL);
2704   }
2705 
2706   Handle element = k->allocate_instance_handle(CHECK_NULL);
2707 
2708   int version = method->constants()->version();
2709   fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_NULL);
2710   return element();
2711 }
2712 
2713 void java_lang_StackTraceElement::fill_in(Handle element,
2714                                           InstanceKlass* holder, const methodHandle& method,
2715                                           int version, int bci, Symbol* name, TRAPS) {
2716   assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check");
2717 
2718   ResourceMark rm(THREAD);
2719   HandleMark hm(THREAD);
2720 
2721   // Fill in class name
2722   Handle java_class(THREAD, holder->java_mirror());
2723   oop classname = java_lang_Class::name(java_class, CHECK);
2724   java_lang_StackTraceElement::set_declaringClass(element(), classname);
2725   java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
2726 
2727   oop loader = holder->class_loader();
2728   if (loader != NULL) {
2729     oop loader_name = java_lang_ClassLoader::name(loader);
2730     if (loader_name != NULL)
2731       java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
2732   }
2733 
2734   // Fill in method name
2735   oop methodname = StringTable::intern(name, CHECK);
2736   java_lang_StackTraceElement::set_methodName(element(), methodname);
2737 
2738   // Fill in module name and version
2739   ModuleEntry* module = holder->module();
2740   if (module->is_named()) {
2741     oop module_name = StringTable::intern(module->name(), CHECK);
2742     java_lang_StackTraceElement::set_moduleName(element(), module_name);
2743     oop module_version;
2744     if (module->version() != NULL) {
2745       module_version = StringTable::intern(module->version(), CHECK);
2746     } else {
2747       module_version = NULL;
2748     }
2749     java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
2750   }
2751 
2752   if (method() == NULL || !version_matches(method(), version)) {
2753     // The method was redefined, accurate line number information isn't available
2754     java_lang_StackTraceElement::set_fileName(element(), NULL);
2755     java_lang_StackTraceElement::set_lineNumber(element(), -1);
2756   } else {
2757     Symbol* source;
2758     oop source_file;
2759     int line_number;
2760     decode_file_and_line(java_class, holder, version, method, bci, source, source_file, line_number, CHECK);
2761 
2762     java_lang_StackTraceElement::set_fileName(element(), source_file);
2763     java_lang_StackTraceElement::set_lineNumber(element(), line_number);
2764   }
2765 }
2766 
2767 void java_lang_StackTraceElement::decode_file_and_line(Handle java_class,
2768                                                        InstanceKlass* holder,
2769                                                        int version,
2770                                                        const methodHandle& method,
2771                                                        int bci,
2772                                                        Symbol*& source,
2773                                                        oop& source_file,
2774                                                        int& line_number, TRAPS) {
2775   // Fill in source file name and line number.
2776   source = Backtrace::get_source_file_name(holder, version);
2777   source_file = java_lang_Class::source_file(java_class());
2778   if (source != NULL) {
2779     // Class was not redefined. We can trust its cache if set,
2780     // else we have to initialize it.
2781     if (source_file == NULL) {
2782       source_file = StringTable::intern(source, CHECK);
2783       java_lang_Class::set_source_file(java_class(), source_file);
2784     }
2785   } else {
2786     // Class was redefined. Dump the cache if it was set.
2787     if (source_file != NULL) {
2788       source_file = NULL;
2789       java_lang_Class::set_source_file(java_class(), source_file);
2790     }
2791   }
2792   line_number = Backtrace::get_line_number(method(), bci);
2793 }
2794 
2795 #if INCLUDE_JVMCI
2796 void java_lang_StackTraceElement::decode(const methodHandle& method, int bci,
2797                                          Symbol*& filename, int& line_number, TRAPS) {
2798   ResourceMark rm(THREAD);
2799   HandleMark hm(THREAD);
2800 
2801   filename = NULL;
2802   line_number = -1;
2803 
2804   oop source_file;
2805   int version = method->constants()->version();
2806   InstanceKlass* holder = method->method_holder();
2807   Handle java_class(THREAD, holder->java_mirror());
2808   decode_file_and_line(java_class, holder, version, method, bci, filename, source_file, line_number, CHECK);
2809 }
2810 #endif // INCLUDE_JVMCI
2811 
2812 // java_lang_StackFrameInfo
2813 
2814 int java_lang_StackFrameInfo::_memberName_offset;
2815 int java_lang_StackFrameInfo::_bci_offset;
2816 int java_lang_StackFrameInfo::_version_offset;
2817 
2818 #define STACKFRAMEINFO_FIELDS_DO(macro) \
2819   macro(_memberName_offset,     k, "memberName",  object_signature, false); \
2820   macro(_bci_offset,            k, "bci",         int_signature,    false)
2821 
2822 void java_lang_StackFrameInfo::compute_offsets() {
2823   InstanceKlass* k = SystemDictionary::StackFrameInfo_klass();
2824   STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2825   STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2826 }
2827 
2828 #if INCLUDE_CDS
2829 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
2830   STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2831   STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
2832 }
2833 #endif
2834 
2835 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) {
2836   HandleMark hm(THREAD);
2837   Handle mname(THREAD, stackFrame->obj_field(_memberName_offset));
2838   Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname());
2839   // we should expand MemberName::name when Throwable uses StackTrace
2840   // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL);
2841   return method;
2842 }
2843 
2844 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, TRAPS) {
2845   // set Method* or mid/cpref
2846   HandleMark hm(THREAD);
2847   Handle mname(Thread::current(), stackFrame->obj_field(_memberName_offset));
2848   InstanceKlass* ik = method->method_holder();
2849   CallInfo info(method(), ik, CHECK);
2850   MethodHandles::init_method_MemberName(mname, info);
2851   // set bci
2852   java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
2853   // method may be redefined; store the version
2854   int version = method->constants()->version();
2855   assert((jushort)version == version, "version should be short");
2856   java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
2857 }
2858 
2859 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
2860   ResourceMark rm(THREAD);
2861   HandleMark hm(THREAD);
2862   Handle mname(THREAD, stackFrame->obj_field(java_lang_StackFrameInfo::_memberName_offset));
2863   Klass* clazz = java_lang_Class::as_Klass(java_lang_invoke_MemberName::clazz(mname()));
2864   InstanceKlass* holder = InstanceKlass::cast(clazz);
2865   Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK);
2866 
2867   short version = stackFrame->short_field(_version_offset);
2868   int bci = stackFrame->int_field(_bci_offset);
2869   Symbol* name = method->name();
2870   java_lang_StackTraceElement::fill_in(stack_trace_element, holder, methodHandle(THREAD, method),
2871                                        version, bci, name, CHECK);
2872 }
2873 
2874 void java_lang_StackFrameInfo::set_version(oop element, short value) {
2875   element->short_field_put(_version_offset, value);
2876 }
2877 
2878 void java_lang_StackFrameInfo::set_bci(oop element, int value) {
2879   assert(value >= 0 && value < max_jushort, "must be a valid bci value");
2880   element->int_field_put(_bci_offset, value);
2881 }
2882 
2883 int java_lang_LiveStackFrameInfo::_monitors_offset;
2884 int java_lang_LiveStackFrameInfo::_locals_offset;
2885 int java_lang_LiveStackFrameInfo::_operands_offset;
2886 int java_lang_LiveStackFrameInfo::_mode_offset;
2887 
2888 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
2889   macro(_monitors_offset,   k, "monitors",    object_array_signature, false); \
2890   macro(_locals_offset,     k, "locals",      object_array_signature, false); \
2891   macro(_operands_offset,   k, "operands",    object_array_signature, false); \
2892   macro(_mode_offset,       k, "mode",        int_signature,          false)
2893 
2894 void java_lang_LiveStackFrameInfo::compute_offsets() {
2895   InstanceKlass* k = SystemDictionary::LiveStackFrameInfo_klass();
2896   LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2897 }
2898 
2899 #if INCLUDE_CDS
2900 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
2901   LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2902 }
2903 #endif
2904 
2905 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) {
2906   element->obj_field_put(_monitors_offset, value);
2907 }
2908 
2909 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) {
2910   element->obj_field_put(_locals_offset, value);
2911 }
2912 
2913 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) {
2914   element->obj_field_put(_operands_offset, value);
2915 }
2916 
2917 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) {
2918   element->int_field_put(_mode_offset, value);
2919 }
2920 
2921 
2922 // java_lang_AccessibleObject
2923 
2924 int java_lang_reflect_AccessibleObject::_override_offset;
2925 
2926 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
2927   macro(_override_offset, k, "override", bool_signature, false)
2928 
2929 void java_lang_reflect_AccessibleObject::compute_offsets() {
2930   InstanceKlass* k = SystemDictionary::reflect_AccessibleObject_klass();
2931   ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2932 }
2933 
2934 #if INCLUDE_CDS
2935 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
2936   ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2937 }
2938 #endif
2939 
2940 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
2941   return (jboolean) reflect->bool_field(_override_offset);
2942 }
2943 
2944 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
2945   reflect->bool_field_put(_override_offset, (int) value);
2946 }
2947 
2948 // java_lang_reflect_Method
2949 
2950 int java_lang_reflect_Method::_clazz_offset;
2951 int java_lang_reflect_Method::_name_offset;
2952 int java_lang_reflect_Method::_returnType_offset;
2953 int java_lang_reflect_Method::_parameterTypes_offset;
2954 int java_lang_reflect_Method::_exceptionTypes_offset;
2955 int java_lang_reflect_Method::_slot_offset;
2956 int java_lang_reflect_Method::_modifiers_offset;
2957 int java_lang_reflect_Method::_signature_offset;
2958 int java_lang_reflect_Method::_annotations_offset;
2959 int java_lang_reflect_Method::_parameter_annotations_offset;
2960 int java_lang_reflect_Method::_annotation_default_offset;
2961 
2962 #define METHOD_FIELDS_DO(macro) \
2963   macro(_clazz_offset,          k, vmSymbols::clazz_name(),          class_signature,       false); \
2964   macro(_name_offset,           k, vmSymbols::name_name(),           string_signature,      false); \
2965   macro(_returnType_offset,     k, vmSymbols::returnType_name(),     class_signature,       false); \
2966   macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
2967   macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
2968   macro(_slot_offset,           k, vmSymbols::slot_name(),           int_signature,         false); \
2969   macro(_modifiers_offset,      k, vmSymbols::modifiers_name(),      int_signature,         false); \
2970   macro(_signature_offset,             k, vmSymbols::signature_name(),             string_signature,     false); \
2971   macro(_annotations_offset,           k, vmSymbols::annotations_name(),           byte_array_signature, false); \
2972   macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
2973   macro(_annotation_default_offset,    k, vmSymbols::annotation_default_name(),    byte_array_signature, false);
2974 
2975 void java_lang_reflect_Method::compute_offsets() {
2976   InstanceKlass* k = SystemDictionary::reflect_Method_klass();
2977   METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2978 }
2979 
2980 #if INCLUDE_CDS
2981 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
2982   METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2983 }
2984 #endif
2985 
2986 Handle java_lang_reflect_Method::create(TRAPS) {
2987   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2988   Klass* klass = SystemDictionary::reflect_Method_klass();
2989   // This class is eagerly initialized during VM initialization, since we keep a refence
2990   // to one of the methods
2991   assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
2992   return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
2993 }
2994 
2995 oop java_lang_reflect_Method::clazz(oop reflect) {
2996   return reflect->obj_field(_clazz_offset);
2997 }
2998 
2999 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
3000    reflect->obj_field_put(_clazz_offset, value);
3001 }
3002 
3003 int java_lang_reflect_Method::slot(oop reflect) {
3004   return reflect->int_field(_slot_offset);
3005 }
3006 
3007 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
3008   reflect->int_field_put(_slot_offset, value);
3009 }
3010 
3011 void java_lang_reflect_Method::set_name(oop method, oop value) {
3012   method->obj_field_put(_name_offset, value);
3013 }
3014 
3015 oop java_lang_reflect_Method::return_type(oop method) {
3016   return method->obj_field(_returnType_offset);
3017 }
3018 
3019 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
3020   method->obj_field_put(_returnType_offset, value);
3021 }
3022 
3023 oop java_lang_reflect_Method::parameter_types(oop method) {
3024   return method->obj_field(_parameterTypes_offset);
3025 }
3026 
3027 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
3028   method->obj_field_put(_parameterTypes_offset, value);
3029 }
3030 
3031 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
3032   method->obj_field_put(_exceptionTypes_offset, value);
3033 }
3034 
3035 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
3036   method->int_field_put(_modifiers_offset, value);
3037 }
3038 
3039 void java_lang_reflect_Method::set_signature(oop method, oop value) {
3040   method->obj_field_put(_signature_offset, value);
3041 }
3042 
3043 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
3044   method->obj_field_put(_annotations_offset, value);
3045 }
3046 
3047 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
3048   method->obj_field_put(_parameter_annotations_offset, value);
3049 }
3050 
3051 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
3052   method->obj_field_put(_annotation_default_offset, value);
3053 }
3054 
3055 int java_lang_reflect_Constructor::_clazz_offset;
3056 int java_lang_reflect_Constructor::_parameterTypes_offset;
3057 int java_lang_reflect_Constructor::_exceptionTypes_offset;
3058 int java_lang_reflect_Constructor::_slot_offset;
3059 int java_lang_reflect_Constructor::_modifiers_offset;
3060 int java_lang_reflect_Constructor::_signature_offset;
3061 int java_lang_reflect_Constructor::_annotations_offset;
3062 int java_lang_reflect_Constructor::_parameter_annotations_offset;
3063 
3064 #define CONSTRUCTOR_FIELDS_DO(macro) \
3065   macro(_clazz_offset,          k, vmSymbols::clazz_name(),          class_signature,       false); \
3066   macro(_parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
3067   macro(_exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
3068   macro(_slot_offset,           k, vmSymbols::slot_name(),           int_signature,         false); \
3069   macro(_modifiers_offset,      k, vmSymbols::modifiers_name(),      int_signature,         false); \
3070   macro(_signature_offset,             k, vmSymbols::signature_name(),             string_signature,     false); \
3071   macro(_annotations_offset,           k, vmSymbols::annotations_name(),           byte_array_signature, false); \
3072   macro(_parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
3073 
3074 void java_lang_reflect_Constructor::compute_offsets() {
3075   InstanceKlass* k = SystemDictionary::reflect_Constructor_klass();
3076   CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3077 }
3078 
3079 #if INCLUDE_CDS
3080 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
3081   CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3082 }
3083 #endif
3084 
3085 Handle java_lang_reflect_Constructor::create(TRAPS) {
3086   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3087   Symbol* name = vmSymbols::java_lang_reflect_Constructor();
3088   Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3089   InstanceKlass* ik = InstanceKlass::cast(k);
3090   // Ensure it is initialized
3091   ik->initialize(CHECK_NH);
3092   return ik->allocate_instance_handle(THREAD);
3093 }
3094 
3095 oop java_lang_reflect_Constructor::clazz(oop reflect) {
3096   return reflect->obj_field(_clazz_offset);
3097 }
3098 
3099 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
3100    reflect->obj_field_put(_clazz_offset, value);
3101 }
3102 
3103 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
3104   return constructor->obj_field(_parameterTypes_offset);
3105 }
3106 
3107 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
3108   constructor->obj_field_put(_parameterTypes_offset, value);
3109 }
3110 
3111 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
3112   constructor->obj_field_put(_exceptionTypes_offset, value);
3113 }
3114 
3115 int java_lang_reflect_Constructor::slot(oop reflect) {
3116   return reflect->int_field(_slot_offset);
3117 }
3118 
3119 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
3120   reflect->int_field_put(_slot_offset, value);
3121 }
3122 
3123 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
3124   constructor->int_field_put(_modifiers_offset, value);
3125 }
3126 
3127 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
3128   constructor->obj_field_put(_signature_offset, value);
3129 }
3130 
3131 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
3132   constructor->obj_field_put(_annotations_offset, value);
3133 }
3134 
3135 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
3136   method->obj_field_put(_parameter_annotations_offset, value);
3137 }
3138 
3139 int java_lang_reflect_Field::_clazz_offset;
3140 int java_lang_reflect_Field::_name_offset;
3141 int java_lang_reflect_Field::_type_offset;
3142 int java_lang_reflect_Field::_slot_offset;
3143 int java_lang_reflect_Field::_modifiers_offset;
3144 int java_lang_reflect_Field::_trusted_final_offset;
3145 int java_lang_reflect_Field::_signature_offset;
3146 int java_lang_reflect_Field::_annotations_offset;
3147 
3148 #define FIELD_FIELDS_DO(macro) \
3149   macro(_clazz_offset,     k, vmSymbols::clazz_name(),     class_signature,  false); \
3150   macro(_name_offset,      k, vmSymbols::name_name(),      string_signature, false); \
3151   macro(_type_offset,      k, vmSymbols::type_name(),      class_signature,  false); \
3152   macro(_slot_offset,      k, vmSymbols::slot_name(),      int_signature,    false); \
3153   macro(_modifiers_offset, k, vmSymbols::modifiers_name(), int_signature,    false); \
3154   macro(_trusted_final_offset,    k, vmSymbols::trusted_final_name(),    bool_signature,       false); \
3155   macro(_signature_offset,        k, vmSymbols::signature_name(),        string_signature,     false); \
3156   macro(_annotations_offset,      k, vmSymbols::annotations_name(),      byte_array_signature, false);
3157 
3158 void java_lang_reflect_Field::compute_offsets() {
3159   InstanceKlass* k = SystemDictionary::reflect_Field_klass();
3160   FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3161 }
3162 
3163 #if INCLUDE_CDS
3164 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
3165   FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3166 }
3167 #endif
3168 
3169 Handle java_lang_reflect_Field::create(TRAPS) {
3170   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3171   Symbol* name = vmSymbols::java_lang_reflect_Field();
3172   Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3173   InstanceKlass* ik = InstanceKlass::cast(k);
3174   // Ensure it is initialized
3175   ik->initialize(CHECK_NH);
3176   return ik->allocate_instance_handle(THREAD);
3177 }
3178 
3179 oop java_lang_reflect_Field::clazz(oop reflect) {
3180   return reflect->obj_field(_clazz_offset);
3181 }
3182 
3183 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
3184   reflect->obj_field_put(_clazz_offset, value);
3185 }
3186 
3187 oop java_lang_reflect_Field::name(oop field) {
3188   return field->obj_field(_name_offset);
3189 }
3190 
3191 void java_lang_reflect_Field::set_name(oop field, oop value) {
3192   field->obj_field_put(_name_offset, value);
3193 }
3194 
3195 oop java_lang_reflect_Field::type(oop field) {
3196   return field->obj_field(_type_offset);
3197 }
3198 
3199 void java_lang_reflect_Field::set_type(oop field, oop value) {
3200   field->obj_field_put(_type_offset, value);
3201 }
3202 
3203 int java_lang_reflect_Field::slot(oop reflect) {
3204   return reflect->int_field(_slot_offset);
3205 }
3206 
3207 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
3208   reflect->int_field_put(_slot_offset, value);
3209 }
3210 
3211 int java_lang_reflect_Field::modifiers(oop field) {
3212   return field->int_field(_modifiers_offset);
3213 }
3214 
3215 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
3216   field->int_field_put(_modifiers_offset, value);
3217 }
3218 
3219 void java_lang_reflect_Field::set_trusted_final(oop field) {
3220   field->bool_field_put(_trusted_final_offset, true);
3221 }
3222 
3223 void java_lang_reflect_Field::set_signature(oop field, oop value) {
3224   field->obj_field_put(_signature_offset, value);
3225 }
3226 
3227 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
3228   field->obj_field_put(_annotations_offset, value);
3229 }
3230 
3231 oop java_lang_reflect_RecordComponent::create(InstanceKlass* holder, RecordComponent* component, TRAPS) {
3232   // Allocate java.lang.reflect.RecordComponent instance
3233   HandleMark hm(THREAD);
3234   InstanceKlass* ik = SystemDictionary::RecordComponent_klass();
3235   assert(ik != NULL, "must be loaded");
3236   ik->initialize(CHECK_NULL);
3237 
3238   Handle element = ik->allocate_instance_handle(CHECK_NULL);
3239 
3240   Handle decl_class(THREAD, holder->java_mirror());
3241   java_lang_reflect_RecordComponent::set_clazz(element(), decl_class());
3242 
3243   Symbol* name = holder->constants()->symbol_at(component->name_index()); // name_index is a utf8
3244   oop component_name = StringTable::intern(name, CHECK_NULL);
3245   java_lang_reflect_RecordComponent::set_name(element(), component_name);
3246 
3247   Symbol* type = holder->constants()->symbol_at(component->descriptor_index());
3248   Handle component_type_h =
3249     SystemDictionary::find_java_mirror_for_type(type, holder, SignatureStream::NCDFError, CHECK_NULL);
3250   java_lang_reflect_RecordComponent::set_type(element(), component_type_h());
3251 
3252   Method* accessor_method = NULL;
3253   {
3254     // Prepend "()" to type to create the full method signature.
3255     ResourceMark rm(THREAD);
3256     int sig_len = type->utf8_length() + 3; // "()" and null char
3257     char* sig = NEW_RESOURCE_ARRAY(char, sig_len);
3258     jio_snprintf(sig, sig_len, "%c%c%s", JVM_SIGNATURE_FUNC, JVM_SIGNATURE_ENDFUNC, type->as_C_string());
3259     TempNewSymbol full_sig = SymbolTable::new_symbol(sig);
3260     accessor_method = holder->find_instance_method(name, full_sig, Klass::find_private);
3261   }
3262 
3263   if (accessor_method != NULL) {
3264     methodHandle method(THREAD, accessor_method);
3265     oop m = Reflection::new_method(method, false, CHECK_NULL);
3266     java_lang_reflect_RecordComponent::set_accessor(element(), m);
3267   } else {
3268     java_lang_reflect_RecordComponent::set_accessor(element(), NULL);
3269   }
3270 
3271   int sig_index = component->generic_signature_index();
3272   if (sig_index > 0) {
3273     Symbol* sig = holder->constants()->symbol_at(sig_index); // sig_index is a utf8
3274     oop component_sig = StringTable::intern(sig, CHECK_NULL);
3275     java_lang_reflect_RecordComponent::set_signature(element(), component_sig);
3276   } else {
3277     java_lang_reflect_RecordComponent::set_signature(element(), NULL);
3278   }
3279 
3280   typeArrayOop annotation_oop = Annotations::make_java_array(component->annotations(), CHECK_NULL);
3281   java_lang_reflect_RecordComponent::set_annotations(element(), annotation_oop);
3282 
3283   typeArrayOop type_annotation_oop = Annotations::make_java_array(component->type_annotations(), CHECK_NULL);
3284   java_lang_reflect_RecordComponent::set_typeAnnotations(element(), type_annotation_oop);
3285 
3286   return element();
3287 }
3288 
3289 int reflect_ConstantPool::_oop_offset;
3290 
3291 #define CONSTANTPOOL_FIELDS_DO(macro) \
3292   macro(_oop_offset, k, "constantPoolOop", object_signature, false)
3293 
3294 void reflect_ConstantPool::compute_offsets() {
3295   InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass();
3296   // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
3297   CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3298 }
3299 
3300 #if INCLUDE_CDS
3301 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3302   CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3303 }
3304 #endif
3305 
3306 int java_lang_reflect_Parameter::_name_offset;
3307 int java_lang_reflect_Parameter::_modifiers_offset;
3308 int java_lang_reflect_Parameter::_index_offset;
3309 int java_lang_reflect_Parameter::_executable_offset;
3310 
3311 #define PARAMETER_FIELDS_DO(macro) \
3312   macro(_name_offset,        k, vmSymbols::name_name(),        string_signature, false); \
3313   macro(_modifiers_offset,   k, vmSymbols::modifiers_name(),   int_signature,    false); \
3314   macro(_index_offset,       k, vmSymbols::index_name(),       int_signature,    false); \
3315   macro(_executable_offset,  k, vmSymbols::executable_name(),  executable_signature, false)
3316 
3317 void java_lang_reflect_Parameter::compute_offsets() {
3318   InstanceKlass* k = SystemDictionary::reflect_Parameter_klass();
3319   PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3320 }
3321 
3322 #if INCLUDE_CDS
3323 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3324   PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3325 }
3326 #endif
3327 
3328 Handle java_lang_reflect_Parameter::create(TRAPS) {
3329   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3330   Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3331   Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3332   InstanceKlass* ik = InstanceKlass::cast(k);
3333   // Ensure it is initialized
3334   ik->initialize(CHECK_NH);
3335   return ik->allocate_instance_handle(THREAD);
3336 }
3337 
3338 oop java_lang_reflect_Parameter::name(oop param) {
3339   return param->obj_field(_name_offset);
3340 }
3341 
3342 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3343   param->obj_field_put(_name_offset, value);
3344 }
3345 
3346 int java_lang_reflect_Parameter::modifiers(oop param) {
3347   return param->int_field(_modifiers_offset);
3348 }
3349 
3350 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3351   param->int_field_put(_modifiers_offset, value);
3352 }
3353 
3354 int java_lang_reflect_Parameter::index(oop param) {
3355   return param->int_field(_index_offset);
3356 }
3357 
3358 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3359   param->int_field_put(_index_offset, value);
3360 }
3361 
3362 oop java_lang_reflect_Parameter::executable(oop param) {
3363   return param->obj_field(_executable_offset);
3364 }
3365 
3366 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3367   param->obj_field_put(_executable_offset, value);
3368 }
3369 
3370 // java_lang_Module
3371 
3372 int java_lang_Module::_loader_offset;
3373 int java_lang_Module::_name_offset;
3374 int java_lang_Module::_module_entry_offset;
3375 
3376 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3377   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3378   return JavaCalls::construct_new_instance(SystemDictionary::Module_klass(),
3379                           vmSymbols::java_lang_module_init_signature(),
3380                           loader, module_name, CHECK_NH);
3381 }
3382 
3383 #define MODULE_FIELDS_DO(macro) \
3384   macro(_loader_offset,  k, vmSymbols::loader_name(),  classloader_signature, false); \
3385   macro(_name_offset,    k, vmSymbols::name_name(),    string_signature,      false)
3386 
3387 void java_lang_Module::compute_offsets() {
3388   InstanceKlass* k = SystemDictionary::Module_klass();
3389   MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3390   MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3391 }
3392 
3393 #if INCLUDE_CDS
3394 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3395   MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3396   MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3397 }
3398 #endif
3399 
3400 oop java_lang_Module::loader(oop module) {
3401   return module->obj_field(_loader_offset);
3402 }
3403 
3404 void java_lang_Module::set_loader(oop module, oop value) {
3405   module->obj_field_put(_loader_offset, value);
3406 }
3407 
3408 oop java_lang_Module::name(oop module) {
3409   return module->obj_field(_name_offset);
3410 }
3411 
3412 void java_lang_Module::set_name(oop module, oop value) {
3413   module->obj_field_put(_name_offset, value);
3414 }
3415 
3416 ModuleEntry* java_lang_Module::module_entry(oop module) {
3417   assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3418   assert(module != NULL, "module can't be null");
3419   assert(oopDesc::is_oop(module), "module must be oop");
3420 
3421   ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3422   if (module_entry == NULL) {
3423     // If the inject field containing the ModuleEntry* is null then return the
3424     // class loader's unnamed module.
3425     oop loader = java_lang_Module::loader(module);
3426     Handle h_loader = Handle(Thread::current(), loader);
3427     ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3428     return loader_cld->unnamed_module();
3429   }
3430   return module_entry;
3431 }
3432 
3433 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3434   assert(_module_entry_offset != 0, "Uninitialized module_entry_offset");
3435   assert(module != NULL, "module can't be null");
3436   assert(oopDesc::is_oop(module), "module must be oop");
3437   module->address_field_put(_module_entry_offset, (address)module_entry);
3438 }
3439 
3440 Handle reflect_ConstantPool::create(TRAPS) {
3441   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3442   InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass();
3443   // Ensure it is initialized
3444   k->initialize(CHECK_NH);
3445   return k->allocate_instance_handle(THREAD);
3446 }
3447 
3448 
3449 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3450   oop mirror = value->pool_holder()->java_mirror();
3451   // Save the mirror to get back the constant pool.
3452   reflect->obj_field_put(_oop_offset, mirror);
3453 }
3454 
3455 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3456 
3457   oop mirror = reflect->obj_field(_oop_offset);
3458   Klass* k = java_lang_Class::as_Klass(mirror);
3459   assert(k->is_instance_klass(), "Must be");
3460 
3461   // Get the constant pool back from the klass.  Since class redefinition
3462   // merges the new constant pool into the old, this is essentially the
3463   // same constant pool as the original.  If constant pool merging is
3464   // no longer done in the future, this will have to change to save
3465   // the original.
3466   return InstanceKlass::cast(k)->constants();
3467 }
3468 
3469 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
3470 
3471 #define UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(macro) \
3472   macro(_base_offset, k, "base", object_signature, false)
3473 
3474 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
3475   InstanceKlass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
3476   UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3477 }
3478 
3479 #if INCLUDE_CDS
3480 void reflect_UnsafeStaticFieldAccessorImpl::serialize_offsets(SerializeClosure* f) {
3481   UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3482 }
3483 #endif
3484 
3485 // Support for java_lang_ref_Reference
3486 
3487 bool java_lang_ref_Reference::_offsets_initialized;
3488 
3489 int java_lang_ref_Reference::_referent_offset;
3490 int java_lang_ref_Reference::_queue_offset;
3491 int java_lang_ref_Reference::_next_offset;
3492 int java_lang_ref_Reference::_discovered_offset;
3493 
3494 #define REFERENCE_FIELDS_DO(macro) \
3495   macro(_referent_offset,   k, "referent", object_signature, false); \
3496   macro(_queue_offset,      k, "queue", referencequeue_signature, false); \
3497   macro(_next_offset,       k, "next", reference_signature, false); \
3498   macro(_discovered_offset, k, "discovered", reference_signature, false);
3499 
3500 void java_lang_ref_Reference::compute_offsets() {
3501   if (_offsets_initialized) {
3502     return;
3503   }
3504   _offsets_initialized = true;
3505   InstanceKlass* k = SystemDictionary::Reference_klass();
3506   REFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3507 }
3508 
3509 #if INCLUDE_CDS
3510 void java_lang_ref_Reference::serialize_offsets(SerializeClosure* f) {
3511   f->do_bool(&_offsets_initialized);
3512   REFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3513 }
3514 #endif
3515 
3516 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
3517   assert(obj != NULL, "sanity");
3518   if (offset != _referent_offset) {
3519     return false;
3520   }
3521 
3522   Klass* k = obj->klass();
3523   if (!k->is_instance_klass()) {
3524     return false;
3525   }
3526 
3527   InstanceKlass* ik = InstanceKlass::cast(obj->klass());
3528   bool is_reference = ik->reference_type() != REF_NONE;
3529   assert(!is_reference || ik->is_subclass_of(SystemDictionary::Reference_klass()), "sanity");
3530   return is_reference;
3531 }
3532 
3533 int java_lang_boxing_object::_value_offset;
3534 int java_lang_boxing_object::_long_value_offset;
3535 
3536 #define BOXING_FIELDS_DO(macro) \
3537   macro(_value_offset,      integerKlass, "value", int_signature, false); \
3538   macro(_long_value_offset, longKlass, "value", long_signature, false);
3539 
3540 void java_lang_boxing_object::compute_offsets() {
3541   InstanceKlass* integerKlass = SystemDictionary::Integer_klass();
3542   InstanceKlass* longKlass = SystemDictionary::Long_klass();
3543   BOXING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3544 }
3545 
3546 #if INCLUDE_CDS
3547 void java_lang_boxing_object::serialize_offsets(SerializeClosure* f) {
3548   BOXING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3549 }
3550 #endif
3551 
3552 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
3553   Klass* k = SystemDictionary::box_klass(type);
3554   if (k == NULL)  return NULL;
3555   InstanceKlass* ik = InstanceKlass::cast(k);
3556   if (!ik->is_initialized())  ik->initialize(CHECK_NULL);
3557   return ik->allocate_instance(THREAD);
3558 }
3559 
3560 
3561 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
3562   oop box = initialize_and_allocate(type, CHECK_NULL);
3563   if (box == NULL)  return NULL;
3564   switch (type) {
3565     case T_BOOLEAN:
3566       box->bool_field_put(_value_offset, value->z);
3567       break;
3568     case T_CHAR:
3569       box->char_field_put(_value_offset, value->c);
3570       break;
3571     case T_FLOAT:
3572       box->float_field_put(_value_offset, value->f);
3573       break;
3574     case T_DOUBLE:
3575       box->double_field_put(_long_value_offset, value->d);
3576       break;
3577     case T_BYTE:
3578       box->byte_field_put(_value_offset, value->b);
3579       break;
3580     case T_SHORT:
3581       box->short_field_put(_value_offset, value->s);
3582       break;
3583     case T_INT:
3584       box->int_field_put(_value_offset, value->i);
3585       break;
3586     case T_LONG:
3587       box->long_field_put(_long_value_offset, value->j);
3588       break;
3589     default:
3590       return NULL;
3591   }
3592   return box;
3593 }
3594 
3595 
3596 BasicType java_lang_boxing_object::basic_type(oop box) {
3597   if (box == NULL)  return T_ILLEGAL;
3598   BasicType type = SystemDictionary::box_klass_type(box->klass());
3599   if (type == T_OBJECT)         // 'unknown' value returned by SD::bkt
3600     return T_ILLEGAL;
3601   return type;
3602 }
3603 
3604 
3605 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
3606   BasicType type = SystemDictionary::box_klass_type(box->klass());
3607   switch (type) {
3608   case T_BOOLEAN:
3609     value->z = box->bool_field(_value_offset);
3610     break;
3611   case T_CHAR:
3612     value->c = box->char_field(_value_offset);
3613     break;
3614   case T_FLOAT:
3615     value->f = box->float_field(_value_offset);
3616     break;
3617   case T_DOUBLE:
3618     value->d = box->double_field(_long_value_offset);
3619     break;
3620   case T_BYTE:
3621     value->b = box->byte_field(_value_offset);
3622     break;
3623   case T_SHORT:
3624     value->s = box->short_field(_value_offset);
3625     break;
3626   case T_INT:
3627     value->i = box->int_field(_value_offset);
3628     break;
3629   case T_LONG:
3630     value->j = box->long_field(_long_value_offset);
3631     break;
3632   default:
3633     return T_ILLEGAL;
3634   } // end switch
3635   return type;
3636 }
3637 
3638 
3639 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
3640   BasicType type = SystemDictionary::box_klass_type(box->klass());
3641   switch (type) {
3642   case T_BOOLEAN:
3643     box->bool_field_put(_value_offset, value->z);
3644     break;
3645   case T_CHAR:
3646     box->char_field_put(_value_offset, value->c);
3647     break;
3648   case T_FLOAT:
3649     box->float_field_put(_value_offset, value->f);
3650     break;
3651   case T_DOUBLE:
3652     box->double_field_put(_long_value_offset, value->d);
3653     break;
3654   case T_BYTE:
3655     box->byte_field_put(_value_offset, value->b);
3656     break;
3657   case T_SHORT:
3658     box->short_field_put(_value_offset, value->s);
3659     break;
3660   case T_INT:
3661     box->int_field_put(_value_offset, value->i);
3662     break;
3663   case T_LONG:
3664     box->long_field_put(_long_value_offset, value->j);
3665     break;
3666   default:
3667     return T_ILLEGAL;
3668   } // end switch
3669   return type;
3670 }
3671 
3672 
3673 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
3674   switch (type) {
3675   case T_BOOLEAN:   st->print("%s", value->z ? "true" : "false");   break;
3676   case T_CHAR:      st->print("%d", value->c);                      break;
3677   case T_BYTE:      st->print("%d", value->b);                      break;
3678   case T_SHORT:     st->print("%d", value->s);                      break;
3679   case T_INT:       st->print("%d", value->i);                      break;
3680   case T_LONG:      st->print(JLONG_FORMAT, value->j);              break;
3681   case T_FLOAT:     st->print("%f", value->f);                      break;
3682   case T_DOUBLE:    st->print("%lf", value->d);                     break;
3683   default:          st->print("type %d?", type);                    break;
3684   }
3685 }
3686 
3687 
3688 // Support for java_lang_ref_SoftReference
3689 //
3690 
3691 int java_lang_ref_SoftReference::_timestamp_offset;
3692 int java_lang_ref_SoftReference::_static_clock_offset;
3693 
3694 #define SOFTREFERENCE_FIELDS_DO(macro) \
3695   macro(_timestamp_offset,    k, "timestamp", long_signature, false); \
3696   macro(_static_clock_offset, k, "clock",     long_signature, true)
3697 
3698 void java_lang_ref_SoftReference::compute_offsets() {
3699   InstanceKlass* k = SystemDictionary::SoftReference_klass();
3700   SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3701 }
3702 
3703 #if INCLUDE_CDS
3704 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
3705   SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3706 }
3707 #endif
3708 
3709 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
3710   return ref->long_field(_timestamp_offset);
3711 }
3712 
3713 jlong java_lang_ref_SoftReference::clock() {
3714   InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3715   oop base = ik->static_field_base_raw();
3716   return base->long_field(_static_clock_offset);
3717 }
3718 
3719 void java_lang_ref_SoftReference::set_clock(jlong value) {
3720   InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3721   oop base = ik->static_field_base_raw();
3722   base->long_field_put(_static_clock_offset, value);
3723 }
3724 
3725 // Support for java_lang_invoke_DirectMethodHandle
3726 
3727 int java_lang_invoke_DirectMethodHandle::_member_offset;
3728 
3729 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
3730   oop member_name = NULL;
3731   assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
3732          "a DirectMethodHandle oop is expected");
3733   return dmh->obj_field(_member_offset);
3734 }
3735 
3736 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
3737   macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
3738 
3739 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
3740   InstanceKlass* k = SystemDictionary::DirectMethodHandle_klass();
3741   DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3742 }
3743 
3744 #if INCLUDE_CDS
3745 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
3746   DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3747 }
3748 #endif
3749 
3750 // Support for java_lang_invoke_MethodHandle
3751 
3752 int java_lang_invoke_MethodHandle::_type_offset;
3753 int java_lang_invoke_MethodHandle::_form_offset;
3754 
3755 int java_lang_invoke_MemberName::_clazz_offset;
3756 int java_lang_invoke_MemberName::_name_offset;
3757 int java_lang_invoke_MemberName::_type_offset;
3758 int java_lang_invoke_MemberName::_flags_offset;
3759 int java_lang_invoke_MemberName::_method_offset;
3760 int java_lang_invoke_MemberName::_vmindex_offset;
3761 
3762 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
3763 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
3764 
3765 int java_lang_invoke_LambdaForm::_vmentry_offset;
3766 
3767 #define METHODHANDLE_FIELDS_DO(macro) \
3768   macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
3769   macro(_form_offset, k, "form",                 java_lang_invoke_LambdaForm_signature, false)
3770 
3771 void java_lang_invoke_MethodHandle::compute_offsets() {
3772   InstanceKlass* k = SystemDictionary::MethodHandle_klass();
3773   METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3774 }
3775 
3776 #if INCLUDE_CDS
3777 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
3778   METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3779 }
3780 #endif
3781 
3782 #define MEMBERNAME_FIELDS_DO(macro) \
3783   macro(_clazz_offset,   k, vmSymbols::clazz_name(),   class_signature,  false); \
3784   macro(_name_offset,    k, vmSymbols::name_name(),    string_signature, false); \
3785   macro(_type_offset,    k, vmSymbols::type_name(),    object_signature, false); \
3786   macro(_flags_offset,   k, vmSymbols::flags_name(),   int_signature,    false); \
3787   macro(_method_offset,  k, vmSymbols::method_name(),  java_lang_invoke_ResolvedMethodName_signature, false)
3788 
3789 void java_lang_invoke_MemberName::compute_offsets() {
3790   InstanceKlass* k = SystemDictionary::MemberName_klass();
3791   MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3792   MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3793 }
3794 
3795 #if INCLUDE_CDS
3796 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
3797   MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3798   MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3799 }
3800 #endif
3801 
3802 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
3803   InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass();
3804   assert(k != NULL, "jdk mismatch");
3805   RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3806 }
3807 
3808 #if INCLUDE_CDS
3809 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
3810   RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3811 }
3812 #endif
3813 
3814 #define LAMBDAFORM_FIELDS_DO(macro) \
3815   macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
3816 
3817 void java_lang_invoke_LambdaForm::compute_offsets() {
3818   InstanceKlass* k = SystemDictionary::LambdaForm_klass();
3819   assert (k != NULL, "jdk mismatch");
3820   LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3821 }
3822 
3823 #if INCLUDE_CDS
3824 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
3825   LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3826 }
3827 #endif
3828 
3829 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
3830   return obj != NULL && is_subclass(obj->klass());
3831 }
3832 
3833 
3834 oop java_lang_invoke_MethodHandle::type(oop mh) {
3835   return mh->obj_field(_type_offset);
3836 }
3837 
3838 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
3839   mh->obj_field_put(_type_offset, mtype);
3840 }
3841 
3842 oop java_lang_invoke_MethodHandle::form(oop mh) {
3843   assert(_form_offset != 0, "");
3844   return mh->obj_field(_form_offset);
3845 }
3846 
3847 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
3848   assert(_form_offset != 0, "");
3849   mh->obj_field_put(_form_offset, lform);
3850 }
3851 
3852 /// MemberName accessors
3853 
3854 oop java_lang_invoke_MemberName::clazz(oop mname) {
3855   assert(is_instance(mname), "wrong type");
3856   return mname->obj_field(_clazz_offset);
3857 }
3858 
3859 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
3860   assert(is_instance(mname), "wrong type");
3861   mname->obj_field_put(_clazz_offset, clazz);
3862 }
3863 
3864 oop java_lang_invoke_MemberName::name(oop mname) {
3865   assert(is_instance(mname), "wrong type");
3866   return mname->obj_field(_name_offset);
3867 }
3868 
3869 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
3870   assert(is_instance(mname), "wrong type");
3871   mname->obj_field_put(_name_offset, name);
3872 }
3873 
3874 oop java_lang_invoke_MemberName::type(oop mname) {
3875   assert(is_instance(mname), "wrong type");
3876   return mname->obj_field(_type_offset);
3877 }
3878 
3879 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
3880   assert(is_instance(mname), "wrong type");
3881   mname->obj_field_put(_type_offset, type);
3882 }
3883 
3884 int java_lang_invoke_MemberName::flags(oop mname) {
3885   assert(is_instance(mname), "wrong type");
3886   return mname->int_field(_flags_offset);
3887 }
3888 
3889 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
3890   assert(is_instance(mname), "wrong type");
3891   mname->int_field_put(_flags_offset, flags);
3892 }
3893 
3894 
3895 // Return vmtarget from ResolvedMethodName method field through indirection
3896 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
3897   assert(is_instance(mname), "wrong type");
3898   oop method = mname->obj_field(_method_offset);
3899   return method == NULL ? NULL : java_lang_invoke_ResolvedMethodName::vmtarget(method);
3900 }
3901 
3902 bool java_lang_invoke_MemberName::is_method(oop mname) {
3903   assert(is_instance(mname), "must be MemberName");
3904   return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
3905 }
3906 
3907 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
3908   assert(is_instance(mname), "wrong type");
3909   mname->obj_field_put(_method_offset, resolved_method);
3910 }
3911 
3912 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
3913   assert(is_instance(mname), "wrong type");
3914   return (intptr_t) mname->address_field(_vmindex_offset);
3915 }
3916 
3917 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
3918   assert(is_instance(mname), "wrong type");
3919   mname->address_field_put(_vmindex_offset, (address) index);
3920 }
3921 
3922 
3923 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
3924   assert(is_instance(resolved_method), "wrong type");
3925   Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
3926   assert(m->is_method(), "must be");
3927   return m;
3928 }
3929 
3930 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
3931 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
3932   assert(is_instance(resolved_method), "wrong type");
3933   resolved_method->address_field_put(_vmtarget_offset, (address)m);
3934 }
3935 
3936 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) {
3937   assert(is_instance(resolved_method), "wrong type");
3938   resolved_method->obj_field_put(_vmholder_offset, holder);
3939 }
3940 
3941 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
3942   const Method* method = m();
3943 
3944   // lookup ResolvedMethod oop in the table, or create a new one and intern it
3945   oop resolved_method = ResolvedMethodTable::find_method(method);
3946   if (resolved_method != NULL) {
3947     return resolved_method;
3948   }
3949 
3950   InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass();
3951   if (!k->is_initialized()) {
3952     k->initialize(CHECK_NULL);
3953   }
3954 
3955   oop new_resolved_method = k->allocate_instance(CHECK_NULL);
3956 
3957   NoSafepointVerifier nsv;
3958 
3959   if (method->is_old()) {
3960     method = (method->is_deleted()) ? Universe::throw_no_such_method_error() :
3961                                       method->get_new_method();
3962   }
3963 
3964   InstanceKlass* holder = method->method_holder();
3965 
3966   set_vmtarget(new_resolved_method, const_cast<Method*>(method));
3967   // Add a reference to the loader (actually mirror because unsafe anonymous classes will not have
3968   // distinct loaders) to ensure the metadata is kept alive.
3969   // This mirror may be different than the one in clazz field.
3970   set_vmholder(new_resolved_method, holder->java_mirror());
3971 
3972   // Set flag in class to indicate this InstanceKlass has entries in the table
3973   // to avoid walking table during redefinition if none of the redefined classes
3974   // have any membernames in the table.
3975   holder->set_has_resolved_methods();
3976 
3977   return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method));
3978 }
3979 
3980 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
3981   assert(is_instance(lform), "wrong type");
3982   return lform->obj_field(_vmentry_offset);
3983 }
3984 
3985 
3986 // Support for java_lang_invoke_MethodType
3987 
3988 int java_lang_invoke_MethodType::_rtype_offset;
3989 int java_lang_invoke_MethodType::_ptypes_offset;
3990 
3991 #define METHODTYPE_FIELDS_DO(macro) \
3992   macro(_rtype_offset,  k, "rtype",  class_signature,       false); \
3993   macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
3994 
3995 void java_lang_invoke_MethodType::compute_offsets() {
3996   InstanceKlass* k = SystemDictionary::MethodType_klass();
3997   METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3998 }
3999 
4000 #if INCLUDE_CDS
4001 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
4002   METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4003 }
4004 #endif
4005 
4006 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
4007   st->print("(");
4008   objArrayOop pts = ptypes(mt);
4009   for (int i = 0, limit = pts->length(); i < limit; i++) {
4010     java_lang_Class::print_signature(pts->obj_at(i), st);
4011   }
4012   st->print(")");
4013   java_lang_Class::print_signature(rtype(mt), st);
4014 }
4015 
4016 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) {
4017   ResourceMark rm;
4018   stringStream buffer(128);
4019   print_signature(mt, &buffer);
4020   const char* sigstr =       buffer.base();
4021   int         siglen = (int) buffer.size();
4022   Symbol *name;
4023   if (!intern_if_not_found) {
4024     name = SymbolTable::probe(sigstr, siglen);
4025   } else {
4026     name = SymbolTable::new_symbol(sigstr, siglen);
4027   }
4028   return name;
4029 }
4030 
4031 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
4032   if (mt1 == mt2)
4033     return true;
4034   if (rtype(mt1) != rtype(mt2))
4035     return false;
4036   if (ptype_count(mt1) != ptype_count(mt2))
4037     return false;
4038   for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
4039     if (ptype(mt1, i) != ptype(mt2, i))
4040       return false;
4041   }
4042   return true;
4043 }
4044 
4045 oop java_lang_invoke_MethodType::rtype(oop mt) {
4046   assert(is_instance(mt), "must be a MethodType");
4047   return mt->obj_field(_rtype_offset);
4048 }
4049 
4050 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
4051   assert(is_instance(mt), "must be a MethodType");
4052   return (objArrayOop) mt->obj_field(_ptypes_offset);
4053 }
4054 
4055 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
4056   return ptypes(mt)->obj_at(idx);
4057 }
4058 
4059 int java_lang_invoke_MethodType::ptype_count(oop mt) {
4060   return ptypes(mt)->length();
4061 }
4062 
4063 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
4064   objArrayOop pts = ptypes(mt);
4065   int count = pts->length();
4066   int slots = 0;
4067   for (int i = 0; i < count; i++) {
4068     BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
4069     slots += type2size[bt];
4070   }
4071   return slots;
4072 }
4073 
4074 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
4075   BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
4076   return type2size[bt];
4077 }
4078 
4079 
4080 // Support for java_lang_invoke_CallSite
4081 
4082 int java_lang_invoke_CallSite::_target_offset;
4083 int java_lang_invoke_CallSite::_context_offset;
4084 
4085 #define CALLSITE_FIELDS_DO(macro) \
4086   macro(_target_offset,  k, "target", java_lang_invoke_MethodHandle_signature, false); \
4087   macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false)
4088 
4089 void java_lang_invoke_CallSite::compute_offsets() {
4090   InstanceKlass* k = SystemDictionary::CallSite_klass();
4091   CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4092 }
4093 
4094 #if INCLUDE_CDS
4095 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
4096   CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4097 }
4098 #endif
4099 
4100 oop java_lang_invoke_CallSite::context_no_keepalive(oop call_site) {
4101   assert(java_lang_invoke_CallSite::is_instance(call_site), "");
4102 
4103   oop dep_oop = call_site->obj_field_access<AS_NO_KEEPALIVE>(_context_offset);
4104   return dep_oop;
4105 }
4106 
4107 // Support for java_lang_invoke_ConstantCallSite
4108 
4109 int java_lang_invoke_ConstantCallSite::_is_frozen_offset;
4110 
4111 #define CONSTANTCALLSITE_FIELDS_DO(macro) \
4112   macro(_is_frozen_offset, k, "isFrozen", bool_signature, false)
4113 
4114 void java_lang_invoke_ConstantCallSite::compute_offsets() {
4115   InstanceKlass* k = SystemDictionary::ConstantCallSite_klass();
4116   CONSTANTCALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4117 }
4118 
4119 #if INCLUDE_CDS
4120 void java_lang_invoke_ConstantCallSite::serialize_offsets(SerializeClosure* f) {
4121   CONSTANTCALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4122 }
4123 #endif
4124 
4125 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext
4126 
4127 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset;
4128 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_last_cleanup_offset;
4129 
4130 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() {
4131   InstanceKlass* k = SystemDictionary::Context_klass();
4132   CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4133 }
4134 
4135 #if INCLUDE_CDS
4136 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) {
4137   CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4138 }
4139 #endif
4140 
4141 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) {
4142   assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
4143   nmethodBucket* volatile* vmdeps_addr = (nmethodBucket* volatile*)call_site->field_addr(_vmdependencies_offset);
4144   volatile uint64_t* last_cleanup_addr = (volatile uint64_t*)call_site->field_addr(_last_cleanup_offset);
4145   DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr);
4146   return dep_ctx;
4147 }
4148 
4149 // Support for java_security_AccessControlContext
4150 
4151 int java_security_AccessControlContext::_context_offset;
4152 int java_security_AccessControlContext::_privilegedContext_offset;
4153 int java_security_AccessControlContext::_isPrivileged_offset;
4154 int java_security_AccessControlContext::_isAuthorized_offset;
4155 
4156 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \
4157   macro(_context_offset,           k, "context",      protectiondomain_signature, false); \
4158   macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \
4159   macro(_isPrivileged_offset,      k, "isPrivileged", bool_signature, false); \
4160   macro(_isAuthorized_offset,      k, "isAuthorized", bool_signature, false)
4161 
4162 void java_security_AccessControlContext::compute_offsets() {
4163   assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
4164   InstanceKlass* k = SystemDictionary::AccessControlContext_klass();
4165   ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4166 }
4167 
4168 #if INCLUDE_CDS
4169 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) {
4170   ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4171 }
4172 #endif
4173 
4174 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
4175   assert(_isPrivileged_offset != 0, "offsets should have been initialized");
4176   assert(_isAuthorized_offset != 0, "offsets should have been initialized");
4177   // Ensure klass is initialized
4178   SystemDictionary::AccessControlContext_klass()->initialize(CHECK_NULL);
4179   // Allocate result
4180   oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_NULL);
4181   // Fill in values
4182   result->obj_field_put(_context_offset, context());
4183   result->obj_field_put(_privilegedContext_offset, privileged_context());
4184   result->bool_field_put(_isPrivileged_offset, isPrivileged);
4185   // whitelist AccessControlContexts created by the JVM
4186   result->bool_field_put(_isAuthorized_offset, true);
4187   return result;
4188 }
4189 
4190 
4191 // Support for java_lang_ClassLoader
4192 
4193 int  java_lang_ClassLoader::_loader_data_offset;
4194 int  java_lang_ClassLoader::_parallelCapable_offset;
4195 int  java_lang_ClassLoader::_name_offset;
4196 int  java_lang_ClassLoader::_nameAndId_offset;
4197 int  java_lang_ClassLoader::_unnamedModule_offset;
4198 int  java_lang_ClassLoader::_parent_offset;
4199 
4200 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
4201   assert(loader != NULL, "loader must not be NULL");
4202   assert(oopDesc::is_oop(loader), "loader must be oop");
4203   return HeapAccess<MO_ACQUIRE>::load_at(loader, _loader_data_offset);
4204 }
4205 
4206 ClassLoaderData* java_lang_ClassLoader::loader_data_raw(oop loader) {
4207   assert(loader != NULL, "loader must not be NULL");
4208   assert(oopDesc::is_oop(loader), "loader must be oop");
4209   return RawAccess<>::load_at(loader, _loader_data_offset);
4210 }
4211 
4212 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
4213   assert(loader != NULL, "loader must not be NULL");
4214   assert(oopDesc::is_oop(loader), "loader must be oop");
4215   HeapAccess<MO_RELEASE>::store_at(loader, _loader_data_offset, new_data);
4216 }
4217 
4218 #define CLASSLOADER_FIELDS_DO(macro) \
4219   macro(_parallelCapable_offset, k1, "parallelLockMap",      concurrenthashmap_signature, false); \
4220   macro(_name_offset,            k1, vmSymbols::name_name(), string_signature, false); \
4221   macro(_nameAndId_offset,       k1, "nameAndId",            string_signature, false); \
4222   macro(_unnamedModule_offset,   k1, "unnamedModule",        module_signature, false); \
4223   macro(_parent_offset,          k1, "parent",               classloader_signature, false)
4224 
4225 void java_lang_ClassLoader::compute_offsets() {
4226   InstanceKlass* k1 = SystemDictionary::ClassLoader_klass();
4227   CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4228 
4229   CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
4230 }
4231 
4232 #if INCLUDE_CDS
4233 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
4234   CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4235   CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
4236 }
4237 #endif
4238 
4239 oop java_lang_ClassLoader::parent(oop loader) {
4240   assert(is_instance(loader), "loader must be oop");
4241   return loader->obj_field(_parent_offset);
4242 }
4243 
4244 // Returns the name field of this class loader.  If the name field has not
4245 // been set, null will be returned.
4246 oop java_lang_ClassLoader::name(oop loader) {
4247   assert(is_instance(loader), "loader must be oop");
4248   return loader->obj_field(_name_offset);
4249 }
4250 
4251 // Returns the nameAndId field of this class loader. The format is
4252 // as follows:
4253 //   If the defining loader has a name explicitly set then '<loader-name>' @<id>
4254 //   If the defining loader has no name then <qualified-class-name> @<id>
4255 //   If built-in loader, then omit '@<id>' as there is only one instance.
4256 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
4257 oop java_lang_ClassLoader::nameAndId(oop loader) {
4258   assert(is_instance(loader), "loader must be oop");
4259   return loader->obj_field(_nameAndId_offset);
4260 }
4261 
4262 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
4263   assert(is_instance(loader), "loader must be oop");
4264   assert(cl == NULL || is_instance(cl), "cl argument must be oop");
4265   oop acl = loader;
4266   debug_only(jint loop_count = 0);
4267   // This loop taken verbatim from ClassLoader.java:
4268   do {
4269     acl = parent(acl);
4270     if (cl == acl) {
4271       return true;
4272     }
4273     assert(++loop_count > 0, "loop_count overflow");
4274   } while (acl != NULL);
4275   return false;
4276 }
4277 
4278 bool java_lang_ClassLoader::is_instance(oop obj) {
4279   return obj != NULL && is_subclass(obj->klass());
4280 }
4281 
4282 
4283 // For class loader classes, parallelCapable defined
4284 // based on non-null field
4285 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
4286 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
4287   assert(_parallelCapable_offset != 0, "offsets should have been initialized");
4288   return (class_loader->obj_field(_parallelCapable_offset) != NULL);
4289 }
4290 
4291 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
4292   // Fix for 4474172; see evaluation for more details
4293   loader = non_reflection_class_loader(loader);
4294 
4295   oop cl = SystemDictionary::java_system_loader();
4296   while(cl != NULL) {
4297     if (cl == loader) return true;
4298     cl = parent(cl);
4299   }
4300   return false;
4301 }
4302 
4303 // Return true if this is one of the class loaders associated with
4304 // the generated bytecodes for reflection.
4305 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) {
4306   if (loader != NULL) {
4307     Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
4308     // This might be null in non-1.4 JDKs
4309     return (delegating_cl_class != NULL && loader->is_a(delegating_cl_class));
4310   }
4311   return false;
4312 }
4313 
4314 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
4315   // See whether this is one of the class loaders associated with
4316   // the generated bytecodes for reflection, and if so, "magically"
4317   // delegate to its parent to prevent class loading from occurring
4318   // in places where applications using reflection didn't expect it.
4319   if (is_reflection_class_loader(loader)) {
4320     return parent(loader);
4321   }
4322   return loader;
4323 }
4324 
4325 oop java_lang_ClassLoader::unnamedModule(oop loader) {
4326   assert(is_instance(loader), "loader must be oop");
4327   return loader->obj_field(_unnamedModule_offset);
4328 }
4329 
4330 // Support for java_lang_System
4331 //
4332 
4333 int java_lang_System::_static_in_offset;
4334 int java_lang_System::_static_out_offset;
4335 int java_lang_System::_static_err_offset;
4336 int java_lang_System::_static_security_offset;
4337 
4338 #define SYSTEM_FIELDS_DO(macro) \
4339   macro(_static_in_offset,  k, "in",  input_stream_signature, true); \
4340   macro(_static_out_offset, k, "out", print_stream_signature, true); \
4341   macro(_static_err_offset, k, "err", print_stream_signature, true); \
4342   macro(_static_security_offset, k, "security", security_manager_signature, true)
4343 
4344 void java_lang_System::compute_offsets() {
4345   InstanceKlass* k = SystemDictionary::System_klass();
4346   SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4347 }
4348 
4349 #if INCLUDE_CDS
4350 void java_lang_System::serialize_offsets(SerializeClosure* f) {
4351    SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4352 }
4353 #endif
4354 
4355 // Support for jdk_internal_misc_UnsafeConstants
4356 //
4357 class UnsafeConstantsFixup : public FieldClosure {
4358 private:
4359   int _address_size;
4360   int _page_size;
4361   bool _big_endian;
4362   bool _use_unaligned_access;
4363   int _data_cache_line_flush_size;
4364 public:
4365   UnsafeConstantsFixup() {
4366     // round up values for all static final fields
4367     _address_size = sizeof(void*);
4368     _page_size = os::vm_page_size();
4369     _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true);
4370     _use_unaligned_access = UseUnalignedAccesses;
4371     _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size();
4372   }
4373 
4374   void do_field(fieldDescriptor* fd) {
4375     oop mirror = fd->field_holder()->java_mirror();
4376     assert(mirror != NULL, "UnsafeConstants must have mirror already");
4377     assert(fd->field_holder() == SystemDictionary::UnsafeConstants_klass(), "Should be UnsafeConstants");
4378     assert(fd->is_final(), "fields of UnsafeConstants must be final");
4379     assert(fd->is_static(), "fields of UnsafeConstants must be static");
4380     if (fd->name() == vmSymbols::address_size_name()) {
4381       mirror->int_field_put(fd->offset(), _address_size);
4382     } else if (fd->name() == vmSymbols::page_size_name()) {
4383       mirror->int_field_put(fd->offset(), _page_size);
4384     } else if (fd->name() == vmSymbols::big_endian_name()) {
4385       mirror->bool_field_put(fd->offset(), _big_endian);
4386     } else if (fd->name() == vmSymbols::use_unaligned_access_name()) {
4387       mirror->bool_field_put(fd->offset(), _use_unaligned_access);
4388     } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) {
4389       mirror->int_field_put(fd->offset(), _data_cache_line_flush_size);
4390     } else {
4391       assert(false, "unexpected UnsafeConstants field");
4392     }
4393   }
4394 };
4395 
4396 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() {
4397   UnsafeConstantsFixup fixup;
4398   SystemDictionary::UnsafeConstants_klass()->do_local_static_fields(&fixup);
4399 }
4400 
4401 
4402 // java_lang_StackTraceElement
4403 
4404 int java_lang_StackTraceElement::_methodName_offset;
4405 int java_lang_StackTraceElement::_fileName_offset;
4406 int java_lang_StackTraceElement::_lineNumber_offset;
4407 int java_lang_StackTraceElement::_moduleName_offset;
4408 int java_lang_StackTraceElement::_moduleVersion_offset;
4409 int java_lang_StackTraceElement::_classLoaderName_offset;
4410 int java_lang_StackTraceElement::_declaringClass_offset;
4411 int java_lang_StackTraceElement::_declaringClassObject_offset;
4412 
4413 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4414   macro(_declaringClassObject_offset,  k, "declaringClassObject", class_signature, false); \
4415   macro(_classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4416   macro(_moduleName_offset,      k, "moduleName",      string_signature, false); \
4417   macro(_moduleVersion_offset,   k, "moduleVersion",   string_signature, false); \
4418   macro(_declaringClass_offset,  k, "declaringClass",  string_signature, false); \
4419   macro(_methodName_offset,      k, "methodName",      string_signature, false); \
4420   macro(_fileName_offset,        k, "fileName",        string_signature, false); \
4421   macro(_lineNumber_offset,      k, "lineNumber",      int_signature,    false)
4422 
4423 // Support for java_lang_StackTraceElement
4424 void java_lang_StackTraceElement::compute_offsets() {
4425   InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
4426   STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4427 }
4428 
4429 #if INCLUDE_CDS
4430 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
4431   STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4432 }
4433 #endif
4434 
4435 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
4436   element->obj_field_put(_fileName_offset, value);
4437 }
4438 
4439 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
4440   element->obj_field_put(_declaringClass_offset, value);
4441 }
4442 
4443 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
4444   element->obj_field_put(_methodName_offset, value);
4445 }
4446 
4447 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
4448   element->int_field_put(_lineNumber_offset, value);
4449 }
4450 
4451 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
4452   element->obj_field_put(_moduleName_offset, value);
4453 }
4454 
4455 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
4456   element->obj_field_put(_moduleVersion_offset, value);
4457 }
4458 
4459 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
4460   element->obj_field_put(_classLoaderName_offset, value);
4461 }
4462 
4463 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
4464   element->obj_field_put(_declaringClassObject_offset, value);
4465 }
4466 
4467 
4468 // java_lang_AssertionStatusDirectives
4469 
4470 int java_lang_AssertionStatusDirectives::_classes_offset;
4471 int java_lang_AssertionStatusDirectives::_classEnabled_offset;
4472 int java_lang_AssertionStatusDirectives::_packages_offset;
4473 int java_lang_AssertionStatusDirectives::_packageEnabled_offset;
4474 int java_lang_AssertionStatusDirectives::_deflt_offset;
4475 
4476 // Support for java Assertions - java_lang_AssertionStatusDirectives.
4477 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
4478   macro(_classes_offset,        k, "classes",        string_array_signature, false); \
4479   macro(_classEnabled_offset,   k, "classEnabled",   bool_array_signature, false); \
4480   macro(_packages_offset,       k, "packages",       string_array_signature, false); \
4481   macro(_packageEnabled_offset, k, "packageEnabled", bool_array_signature,   false); \
4482   macro(_deflt_offset,          k, "deflt",          bool_signature,         false)
4483 
4484 void java_lang_AssertionStatusDirectives::compute_offsets() {
4485   InstanceKlass* k = SystemDictionary::AssertionStatusDirectives_klass();
4486   ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4487 }
4488 
4489 #if INCLUDE_CDS
4490 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
4491   ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4492 }
4493 #endif
4494 
4495 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
4496   o->obj_field_put(_classes_offset, val);
4497 }
4498 
4499 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
4500   o->obj_field_put(_classEnabled_offset, val);
4501 }
4502 
4503 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
4504   o->obj_field_put(_packages_offset, val);
4505 }
4506 
4507 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
4508   o->obj_field_put(_packageEnabled_offset, val);
4509 }
4510 
4511 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
4512   o->bool_field_put(_deflt_offset, val);
4513 }
4514 
4515 
4516 // Support for intrinsification of java.nio.Buffer.checkIndex
4517 
4518 int java_nio_Buffer::_limit_offset;
4519 
4520 #define BUFFER_FIELDS_DO(macro) \
4521   macro(_limit_offset, k, "limit", int_signature, false)
4522 
4523 void java_nio_Buffer::compute_offsets() {
4524   InstanceKlass* k = SystemDictionary::nio_Buffer_klass();
4525   assert(k != NULL, "must be loaded in 1.4+");
4526   BUFFER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4527 }
4528 
4529 #if INCLUDE_CDS
4530 void java_nio_Buffer::serialize_offsets(SerializeClosure* f) {
4531   BUFFER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4532 }
4533 #endif
4534 
4535 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
4536 
4537 #define AOS_FIELDS_DO(macro) \
4538   macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
4539 
4540 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
4541   InstanceKlass* k = SystemDictionary::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
4542   AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4543 }
4544 
4545 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
4546   assert(_owner_offset != 0, "Must be initialized");
4547   return obj->obj_field(_owner_offset);
4548 }
4549 
4550 #if INCLUDE_CDS
4551 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
4552   AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4553 }
4554 #endif
4555 
4556 int java_lang_Integer_IntegerCache::_static_cache_offset;
4557 int java_lang_Long_LongCache::_static_cache_offset;
4558 int java_lang_Character_CharacterCache::_static_cache_offset;
4559 int java_lang_Short_ShortCache::_static_cache_offset;
4560 int java_lang_Byte_ByteCache::_static_cache_offset;
4561 
4562 #define INTEGER_CACHE_FIELDS_DO(macro) \
4563   macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true)
4564 
4565 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) {
4566   guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4567   INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4568 }
4569 
4570 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) {
4571   oop base = ik->static_field_base_raw();
4572   return objArrayOop(base->obj_field(_static_cache_offset));
4573 }
4574 
4575 Symbol* java_lang_Integer_IntegerCache::symbol() {
4576   return vmSymbols::java_lang_Integer_IntegerCache();
4577 }
4578 
4579 #if INCLUDE_CDS
4580 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) {
4581   INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4582 }
4583 #endif
4584 #undef INTEGER_CACHE_FIELDS_DO
4585 
4586 jint java_lang_Integer::value(oop obj) {
4587    jvalue v;
4588    java_lang_boxing_object::get_value(obj, &v);
4589    return v.i;
4590 }
4591 
4592 #define LONG_CACHE_FIELDS_DO(macro) \
4593   macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true)
4594 
4595 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) {
4596   guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4597   LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4598 }
4599 
4600 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) {
4601   oop base = ik->static_field_base_raw();
4602   return objArrayOop(base->obj_field(_static_cache_offset));
4603 }
4604 
4605 Symbol* java_lang_Long_LongCache::symbol() {
4606   return vmSymbols::java_lang_Long_LongCache();
4607 }
4608 
4609 #if INCLUDE_CDS
4610 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) {
4611   LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4612 }
4613 #endif
4614 #undef LONG_CACHE_FIELDS_DO
4615 
4616 jlong java_lang_Long::value(oop obj) {
4617    jvalue v;
4618    java_lang_boxing_object::get_value(obj, &v);
4619    return v.j;
4620 }
4621 
4622 #define CHARACTER_CACHE_FIELDS_DO(macro) \
4623   macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true)
4624 
4625 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) {
4626   guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4627   CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4628 }
4629 
4630 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) {
4631   oop base = ik->static_field_base_raw();
4632   return objArrayOop(base->obj_field(_static_cache_offset));
4633 }
4634 
4635 Symbol* java_lang_Character_CharacterCache::symbol() {
4636   return vmSymbols::java_lang_Character_CharacterCache();
4637 }
4638 
4639 #if INCLUDE_CDS
4640 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) {
4641   CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4642 }
4643 #endif
4644 #undef CHARACTER_CACHE_FIELDS_DO
4645 
4646 jchar java_lang_Character::value(oop obj) {
4647    jvalue v;
4648    java_lang_boxing_object::get_value(obj, &v);
4649    return v.c;
4650 }
4651 
4652 #define SHORT_CACHE_FIELDS_DO(macro) \
4653   macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true)
4654 
4655 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) {
4656   guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4657   SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4658 }
4659 
4660 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) {
4661   oop base = ik->static_field_base_raw();
4662   return objArrayOop(base->obj_field(_static_cache_offset));
4663 }
4664 
4665 Symbol* java_lang_Short_ShortCache::symbol() {
4666   return vmSymbols::java_lang_Short_ShortCache();
4667 }
4668 
4669 #if INCLUDE_CDS
4670 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) {
4671   SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4672 }
4673 #endif
4674 #undef SHORT_CACHE_FIELDS_DO
4675 
4676 jshort java_lang_Short::value(oop obj) {
4677    jvalue v;
4678    java_lang_boxing_object::get_value(obj, &v);
4679    return v.s;
4680 }
4681 
4682 #define BYTE_CACHE_FIELDS_DO(macro) \
4683   macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true)
4684 
4685 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) {
4686   guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4687   BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4688 }
4689 
4690 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) {
4691   oop base = ik->static_field_base_raw();
4692   return objArrayOop(base->obj_field(_static_cache_offset));
4693 }
4694 
4695 Symbol* java_lang_Byte_ByteCache::symbol() {
4696   return vmSymbols::java_lang_Byte_ByteCache();
4697 }
4698 
4699 #if INCLUDE_CDS
4700 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) {
4701   BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4702 }
4703 #endif
4704 #undef BYTE_CACHE_FIELDS_DO
4705 
4706 jbyte java_lang_Byte::value(oop obj) {
4707    jvalue v;
4708    java_lang_boxing_object::get_value(obj, &v);
4709    return v.b;
4710 }
4711 
4712 int java_lang_Boolean::_static_TRUE_offset;
4713 int java_lang_Boolean::_static_FALSE_offset;
4714 
4715 #define BOOLEAN_FIELDS_DO(macro) \
4716   macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \
4717   macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true)
4718 
4719 
4720 void java_lang_Boolean::compute_offsets(InstanceKlass *k) {
4721   guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4722   BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4723 }
4724 
4725 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) {
4726   oop base = ik->static_field_base_raw();
4727   return base->obj_field(_static_TRUE_offset);
4728 }
4729 
4730 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) {
4731   oop base = ik->static_field_base_raw();
4732   return base->obj_field(_static_FALSE_offset);
4733 }
4734 
4735 Symbol* java_lang_Boolean::symbol() {
4736   return vmSymbols::java_lang_Boolean();
4737 }
4738 
4739 #if INCLUDE_CDS
4740 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) {
4741   BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4742 }
4743 #endif
4744 #undef BOOLEAN_CACHE_FIELDS_DO
4745 
4746 jboolean java_lang_Boolean::value(oop obj) {
4747    jvalue v;
4748    java_lang_boxing_object::get_value(obj, &v);
4749    return v.z;
4750 }
4751 
4752 // java_lang_reflect_RecordComponent
4753 
4754 int java_lang_reflect_RecordComponent::_clazz_offset;
4755 int java_lang_reflect_RecordComponent::_name_offset;
4756 int java_lang_reflect_RecordComponent::_type_offset;
4757 int java_lang_reflect_RecordComponent::_accessor_offset;
4758 int java_lang_reflect_RecordComponent::_signature_offset;
4759 int java_lang_reflect_RecordComponent::_annotations_offset;
4760 int java_lang_reflect_RecordComponent::_typeAnnotations_offset;
4761 
4762 #define RECORDCOMPONENT_FIELDS_DO(macro) \
4763   macro(_clazz_offset,       k, "clazz",       class_signature,  false); \
4764   macro(_name_offset,        k, "name",        string_signature, false); \
4765   macro(_type_offset,        k, "type",        class_signature,  false); \
4766   macro(_accessor_offset,    k, "accessor",    reflect_method_signature, false); \
4767   macro(_signature_offset,   k, "signature",   string_signature, false); \
4768   macro(_annotations_offset, k, "annotations", byte_array_signature,     false); \
4769   macro(_typeAnnotations_offset, k, "typeAnnotations", byte_array_signature, false);
4770 
4771 // Support for java_lang_reflect_RecordComponent
4772 void java_lang_reflect_RecordComponent::compute_offsets() {
4773   InstanceKlass* k = SystemDictionary::RecordComponent_klass();
4774   RECORDCOMPONENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4775 }
4776 
4777 #if INCLUDE_CDS
4778 void java_lang_reflect_RecordComponent::serialize_offsets(SerializeClosure* f) {
4779   RECORDCOMPONENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4780 }
4781 #endif
4782 
4783 void java_lang_reflect_RecordComponent::set_clazz(oop element, oop value) {
4784   element->obj_field_put(_clazz_offset, value);
4785 }
4786 
4787 void java_lang_reflect_RecordComponent::set_name(oop element, oop value) {
4788   element->obj_field_put(_name_offset, value);
4789 }
4790 
4791 void java_lang_reflect_RecordComponent::set_type(oop element, oop value) {
4792   element->obj_field_put(_type_offset, value);
4793 }
4794 
4795 void java_lang_reflect_RecordComponent::set_accessor(oop element, oop value) {
4796   element->obj_field_put(_accessor_offset, value);
4797 }
4798 
4799 void java_lang_reflect_RecordComponent::set_signature(oop element, oop value) {
4800   element->obj_field_put(_signature_offset, value);
4801 }
4802 
4803 void java_lang_reflect_RecordComponent::set_annotations(oop element, oop value) {
4804   element->obj_field_put(_annotations_offset, value);
4805 }
4806 
4807 void java_lang_reflect_RecordComponent::set_typeAnnotations(oop element, oop value) {
4808   element->obj_field_put(_typeAnnotations_offset, value);
4809 }
4810 
4811 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
4812 
4813 // Compute field offsets of all the classes in this file
4814 void JavaClasses::compute_offsets() {
4815   if (UseSharedSpaces) {
4816     JVMTI_ONLY(assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
4817                                                          JvmtiExport::has_early_class_hook_env()),
4818                       "JavaClasses::compute_offsets() must be called in early JVMTI phase."));
4819     // None of the classes used by the rest of this function can be replaced by
4820     // JVMTI ClassFileLoadHook.
4821     // We are safe to use the archived offsets, which have already been restored
4822     // by JavaClasses::serialize_offsets, without computing the offsets again.
4823     return;
4824   }
4825 
4826   // We have already called the compute_offsets() of the
4827   // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String, java_lang_Class and
4828   // java_lang_ref_Reference) earlier inside SystemDictionary::resolve_well_known_classes()
4829   BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
4830 }
4831 
4832 #if INCLUDE_CDS
4833 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
4834 
4835 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
4836   BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
4837 }
4838 #endif
4839 
4840 #if INCLUDE_CDS_JAVA_HEAP
4841 bool JavaClasses::is_supported_for_archiving(oop obj) {
4842   Klass* klass = obj->klass();
4843 
4844   if (klass == SystemDictionary::ClassLoader_klass() ||  // ClassLoader::loader_data is malloc'ed.
4845       klass == SystemDictionary::Module_klass() ||       // Module::module_entry is malloc'ed
4846       // The next 3 classes are used to implement java.lang.invoke, and are not used directly in
4847       // regular Java code. The implementation of java.lang.invoke uses generated anonymoys classes
4848       // (e.g., as referenced by ResolvedMethodName::vmholder) that are not yet supported by CDS.
4849       // So for now we cannot not support these classes for archiving.
4850       //
4851       // These objects typically are not referenced by static fields, but rather by resolved
4852       // constant pool entries, so excluding them shouldn't affect the archiving of static fields.
4853       klass == SystemDictionary::ResolvedMethodName_klass() ||
4854       klass == SystemDictionary::MemberName_klass() ||
4855       klass == SystemDictionary::Context_klass()) {
4856     return false;
4857   }
4858 
4859   return true;
4860 }
4861 #endif
4862 
4863 #ifndef PRODUCT
4864 
4865 // These functions exist to assert the validity of de-serialized offsets in boxing object as a sanity check.
4866 
4867 bool JavaClasses::check_offset(const char *klass_name, int deserialized_offset, const char *field_name,
4868                                const char* field_sig) {
4869   EXCEPTION_MARK;
4870   fieldDescriptor fd;
4871   TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name);
4872   Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
4873   InstanceKlass* ik = InstanceKlass::cast(k);
4874   TempNewSymbol f_name = SymbolTable::new_symbol(field_name);
4875   TempNewSymbol f_sig  = SymbolTable::new_symbol(field_sig);
4876   if (!ik->find_local_field(f_name, f_sig, &fd)) {
4877     tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
4878     return false;
4879   }
4880   if (fd.is_static()) {
4881     tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
4882     return false;
4883   }
4884   if (fd.offset() == deserialized_offset ) {
4885     return true;
4886   } else {
4887     tty->print_cr("Offset of nonstatic field %s.%s is deserialized as %d but should really be %d.",
4888                   klass_name, field_name, deserialized_offset, fd.offset());
4889     return false;
4890   }
4891 }
4892 
4893 void JavaClasses::check_offsets() {
4894   bool valid = true;
4895 
4896 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
4897   valid &= check_offset(klass_name, cpp_klass_name :: _##field_name ## _offset, #field_name, field_sig)
4898 
4899 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
4900   valid &= check_offset(klass_name, cpp_klass_name :: _##long_ ## field_name ## _offset, #field_name, field_sig)
4901 
4902   // Boxed primitive objects (java_lang_boxing_object)
4903 
4904   CHECK_OFFSET("java/lang/Boolean",   java_lang_boxing_object, value, "Z");
4905   CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
4906   CHECK_OFFSET("java/lang/Float",     java_lang_boxing_object, value, "F");
4907   CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
4908   CHECK_OFFSET("java/lang/Byte",      java_lang_boxing_object, value, "B");
4909   CHECK_OFFSET("java/lang/Short",     java_lang_boxing_object, value, "S");
4910   CHECK_OFFSET("java/lang/Integer",   java_lang_boxing_object, value, "I");
4911   CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
4912 
4913   if (!valid) vm_exit_during_initialization("Field offset verification failed");
4914 }
4915 
4916 #endif // PRODUCT
4917 
4918 int InjectedField::compute_offset() {
4919   InstanceKlass* ik = InstanceKlass::cast(klass());
4920   for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4921     if (!may_be_java && !fs.access_flags().is_internal()) {
4922       // Only look at injected fields
4923       continue;
4924     }
4925     if (fs.name() == name() && fs.signature() == signature()) {
4926       return fs.offset();
4927     }
4928   }
4929   ResourceMark rm;
4930   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)" : "");
4931 #ifndef PRODUCT
4932   ik->print();
4933   tty->print_cr("all fields:");
4934   for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4935     tty->print_cr("  name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
4936   }
4937 #endif //PRODUCT
4938   vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
4939   return -1;
4940 }
4941 
4942 void javaClasses_init() {
4943   JavaClasses::compute_offsets();
4944   JavaClasses::check_offsets();
4945   FilteredFieldsMap::initialize();  // must be done after computing offsets.
4946 }