1 /*
   2  * Copyright (c) 1997, 2019, 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.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/typeArrayOop.inline.hpp"
  54 #include "prims/jvmtiExport.hpp"
  55 #include "prims/resolvedMethodTable.hpp"
  56 #include "runtime/fieldDescriptor.inline.hpp"
  57 #include "runtime/frame.inline.hpp"
  58 #include "runtime/handles.inline.hpp"
  59 #include "runtime/interfaceSupport.inline.hpp"
  60 #include "runtime/java.hpp"
  61 #include "runtime/javaCalls.hpp"
  62 #include "runtime/jniHandles.inline.hpp"
  63 #include "runtime/safepoint.hpp"
  64 #include "runtime/safepointVerifiers.hpp"
  65 #include "runtime/thread.inline.hpp"
  66 #include "runtime/vframe.inline.hpp"
  67 #include "runtime/vm_version.hpp"
  68 #include "utilities/align.hpp"
  69 #include "utilities/preserveException.hpp"
  70 #include "utilities/utf8.hpp"
  71 #if INCLUDE_JVMCI
  72 #include "jvmci/jvmciJavaClasses.hpp"
  73 #endif
  74 
  75 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java)    \
  76   klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum);
  77 
  78 #if INCLUDE_CDS
  79 #define INJECTED_FIELD_SERIALIZE_OFFSET(klass, name, signature, may_be_java) \
  80   f->do_u4((u4*)&_##name##_offset);
  81 #endif
  82 
  83 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java)           \
  84   { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java },
  85 
  86 InjectedField JavaClasses::_injected_fields[] = {
  87   ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
  88 };
  89 
  90 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
  91   return _injected_fields[id].compute_offset();
  92 }
  93 
  94 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
  95   *field_count = 0;
  96 
  97   vmSymbols::SID sid = vmSymbols::find_sid(class_name);
  98   if (sid == vmSymbols::NO_SID) {
  99     // Only well known classes can inject fields
 100     return NULL;
 101   }
 102 
 103   int count = 0;
 104   int start = -1;
 105 
 106 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
 107   if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) {              \
 108     count++;                                                       \
 109     if (start == -1) start = klass##_##name##_enum;                \
 110   }
 111   ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
 112 #undef LOOKUP_INJECTED_FIELD
 113 
 114   if (start != -1) {
 115     *field_count = count;
 116     return _injected_fields + start;
 117   }
 118   return NULL;
 119 }
 120 
 121 
 122 // Helpful routine for computing field offsets at run time rather than hardcoding them
 123 // Finds local fields only, including static fields.  Static field offsets are from the
 124 // beginning of the mirror.
 125 static void compute_offset(int &dest_offset,
 126                            InstanceKlass* ik, Symbol* name_symbol, Symbol* signature_symbol,
 127                            bool is_static = false) {
 128   fieldDescriptor fd;
 129   if (ik == NULL) {
 130     ResourceMark rm;
 131     log_error(class)("Mismatch JDK version for field: %s type: %s", name_symbol->as_C_string(), signature_symbol->as_C_string());
 132     vm_exit_during_initialization("Invalid layout of well-known class");
 133   }
 134 
 135   if (!ik->find_local_field(name_symbol, signature_symbol, &fd) || fd.is_static() != is_static) {
 136     ResourceMark rm;
 137     log_error(class)("Invalid layout of %s field: %s type: %s", ik->external_name(),
 138                      name_symbol->as_C_string(), signature_symbol->as_C_string());
 139 #ifndef PRODUCT
 140     // Prints all fields and offsets
 141     Log(class) lt;
 142     LogStream ls(lt.error());
 143     ik->print_on(&ls);
 144 #endif //PRODUCT
 145     vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
 146   }
 147   dest_offset = fd.offset();
 148 }
 149 
 150 // Overloading to pass name as a string.
 151 static void compute_offset(int& dest_offset, InstanceKlass* ik,
 152                            const char* name_string, Symbol* signature_symbol,
 153                            bool is_static = false) {
 154   TempNewSymbol name = SymbolTable::probe(name_string, (int)strlen(name_string));
 155   if (name == NULL) {
 156     ResourceMark rm;
 157     log_error(class)("Name %s should be in the SymbolTable since its class is loaded", name_string);
 158     vm_exit_during_initialization("Invalid layout of well-known class", ik->external_name());
 159   }
 160   compute_offset(dest_offset, ik, name, signature_symbol, is_static);
 161 }
 162 
 163 int java_lang_String::value_offset  = 0;
 164 int java_lang_String::hash_offset   = 0;
 165 int java_lang_String::hashIsZero_offset = 0;
 166 int java_lang_String::coder_offset  = 0;
 167 
 168 bool java_lang_String::initialized  = false;
 169 
 170 bool java_lang_String::is_instance(oop obj) {
 171   return is_instance_inlined(obj);
 172 }
 173 
 174 #if INCLUDE_CDS
 175 #define FIELD_SERIALIZE_OFFSET(offset, klass, name, signature, is_static) \
 176   f->do_u4((u4*)&offset)
 177 #endif
 178 
 179 #define FIELD_COMPUTE_OFFSET(offset, klass, name, signature, is_static) \
 180   compute_offset(offset, klass, name, vmSymbols::signature(), is_static)
 181 
 182 #define STRING_FIELDS_DO(macro) \
 183   macro(value_offset, k, vmSymbols::value_name(), byte_array_signature, false); \
 184   macro(hash_offset,  k, "hash",                  int_signature,        false); \
 185   macro(hashIsZero_offset, k, "hashIsZero",       bool_signature,       false); \
 186   macro(coder_offset, k, "coder",                 byte_signature,       false);
 187 
 188 void java_lang_String::compute_offsets() {
 189   if (initialized) {
 190     return;
 191   }
 192 
 193   InstanceKlass* k = SystemDictionary::String_klass();
 194   STRING_FIELDS_DO(FIELD_COMPUTE_OFFSET);
 195 
 196   initialized = true;
 197 }
 198 
 199 #if INCLUDE_CDS
 200 void java_lang_String::serialize_offsets(SerializeClosure* f) {
 201   STRING_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
 202   f->do_bool(&initialized);
 203 }
 204 #endif
 205 
 206 class CompactStringsFixup : public FieldClosure {
 207 private:
 208   bool _value;
 209 
 210 public:
 211   CompactStringsFixup(bool value) : _value(value) {}
 212 
 213   void do_field(fieldDescriptor* fd) {
 214     if (fd->name() == vmSymbols::compact_strings_name()) {
 215       oop mirror = fd->field_holder()->java_mirror();
 216       assert(fd->field_holder() == SystemDictionary::String_klass(), "Should be String");
 217       assert(mirror != NULL, "String must have mirror already");
 218       mirror->bool_field_put(fd->offset(), _value);
 219     }
 220   }
 221 };
 222 
 223 void java_lang_String::set_compact_strings(bool value) {
 224   CompactStringsFixup fix(value);
 225   SystemDictionary::String_klass()->do_local_static_fields(&fix);
 226 }
 227 
 228 Handle java_lang_String::basic_create(int length, bool is_latin1, TRAPS) {
 229   assert(initialized, "Must be initialized");
 230   assert(CompactStrings || !is_latin1, "Must be UTF16 without CompactStrings");
 231 
 232   // Create the String object first, so there's a chance that the String
 233   // and the char array it points to end up in the same cache line.
 234   oop obj;
 235   obj = SystemDictionary::String_klass()->allocate_instance(CHECK_NH);
 236 
 237   // Create the char array.  The String object must be handlized here
 238   // because GC can happen as a result of the allocation attempt.
 239   Handle h_obj(THREAD, obj);
 240   int arr_length = is_latin1 ? length : length << 1; // 2 bytes per UTF16.
 241   typeArrayOop buffer = oopFactory::new_byteArray(arr_length, CHECK_NH);;
 242 
 243   // Point the String at the char array
 244   obj = h_obj();
 245   set_value(obj, buffer);
 246   // No need to zero the offset, allocation zero'ed the entire String object
 247   set_coder(obj, is_latin1 ? CODER_LATIN1 : CODER_UTF16);
 248   return h_obj;
 249 }
 250 
 251 Handle java_lang_String::create_from_unicode(const jchar* unicode, int length, TRAPS) {
 252   bool is_latin1 = CompactStrings && UNICODE::is_latin1(unicode, length);
 253   Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
 254   typeArrayOop buffer = value(h_obj());
 255   assert(TypeArrayKlass::cast(buffer->klass())->element_type() == T_BYTE, "only byte[]");
 256   if (is_latin1) {
 257     for (int index = 0; index < length; index++) {
 258       buffer->byte_at_put(index, (jbyte)unicode[index]);
 259     }
 260   } else {
 261     for (int index = 0; index < length; index++) {
 262       buffer->char_at_put(index, unicode[index]);
 263     }
 264   }
 265 
 266 #ifdef ASSERT
 267   {
 268     ResourceMark rm;
 269     char* expected = UNICODE::as_utf8(unicode, length);
 270     char* actual = as_utf8_string(h_obj());
 271     if (strcmp(expected, actual) != 0) {
 272       tty->print_cr("Unicode conversion failure: %s --> %s", expected, actual);
 273       ShouldNotReachHere();
 274     }
 275   }
 276 #endif
 277 
 278   return h_obj;
 279 }
 280 
 281 oop java_lang_String::create_oop_from_unicode(const jchar* unicode, int length, TRAPS) {
 282   Handle h_obj = create_from_unicode(unicode, length, CHECK_0);
 283   return h_obj();
 284 }
 285 
 286 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
 287   if (utf8_str == NULL) {
 288     return Handle();
 289   }
 290   bool has_multibyte, is_latin1;
 291   int length = UTF8::unicode_length(utf8_str, is_latin1, has_multibyte);
 292   if (!CompactStrings) {
 293     has_multibyte = true;
 294     is_latin1 = false;
 295   }
 296 
 297   Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
 298   if (length > 0) {
 299     if (!has_multibyte) {
 300       const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
 301       ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
 302     } else if (is_latin1) {
 303       UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
 304     } else {
 305       UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
 306     }
 307   }
 308 
 309 #ifdef ASSERT
 310   // This check is too strict because the input string is not necessarily valid UTF8.
 311   // For example, it may be created with arbitrary content via jni_NewStringUTF.
 312   /*
 313   {
 314     ResourceMark rm;
 315     const char* expected = utf8_str;
 316     char* actual = as_utf8_string(h_obj());
 317     if (strcmp(expected, actual) != 0) {
 318       tty->print_cr("String conversion failure: %s --> %s", expected, actual);
 319       ShouldNotReachHere();
 320     }
 321   }
 322   */
 323 #endif
 324 
 325   return h_obj;
 326 }
 327 
 328 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
 329   Handle h_obj = create_from_str(utf8_str, CHECK_0);
 330   return h_obj();
 331 }
 332 
 333 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
 334   const char* utf8_str = (char*)symbol->bytes();
 335   int utf8_len = symbol->utf8_length();
 336 
 337   bool has_multibyte, is_latin1;
 338   int length = UTF8::unicode_length(utf8_str, utf8_len, is_latin1, has_multibyte);
 339   if (!CompactStrings) {
 340     has_multibyte = true;
 341     is_latin1 = false;
 342   }
 343 
 344   Handle h_obj = basic_create(length, is_latin1, CHECK_NH);
 345   if (length > 0) {
 346     if (!has_multibyte) {
 347       const jbyte* src = reinterpret_cast<const jbyte*>(utf8_str);
 348       ArrayAccess<>::arraycopy_from_native(src, value(h_obj()), typeArrayOopDesc::element_offset<jbyte>(0), length);
 349     } else if (is_latin1) {
 350       UTF8::convert_to_unicode(utf8_str, value(h_obj())->byte_at_addr(0), length);
 351     } else {
 352       UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
 353     }
 354   }
 355 
 356 #ifdef ASSERT
 357   {
 358     ResourceMark rm;
 359     const char* expected = symbol->as_utf8();
 360     char* actual = as_utf8_string(h_obj());
 361     if (strncmp(expected, actual, utf8_len) != 0) {
 362       tty->print_cr("Symbol conversion failure: %s --> %s", expected, actual);
 363       ShouldNotReachHere();
 364     }
 365   }
 366 #endif
 367 
 368   return h_obj;
 369 }
 370 
 371 // Converts a C string to a Java String based on current encoding
 372 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
 373   assert(str != NULL, "bad arguments");
 374 
 375   typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
 376   static to_java_string_fn_t _to_java_string_fn = NULL;
 377 
 378   if (_to_java_string_fn == NULL) {
 379     void *lib_handle = os::native_java_library();
 380     _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform"));
 381     if (_to_java_string_fn == NULL) {
 382       fatal("NewStringPlatform missing");
 383     }
 384   }
 385 
 386   jstring js = NULL;
 387   { JavaThread* thread = (JavaThread*)THREAD;
 388     assert(thread->is_Java_thread(), "must be java thread");
 389     HandleMark hm(thread);
 390     ThreadToNativeFromVM ttn(thread);
 391     js = (_to_java_string_fn)(thread->jni_environment(), str);
 392   }
 393   return Handle(THREAD, JNIHandles::resolve(js));
 394 }
 395 
 396 // Converts a Java String to a native C string that can be used for
 397 // native OS calls.
 398 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
 399   typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
 400   static to_platform_string_fn_t _to_platform_string_fn = NULL;
 401 
 402   if (_to_platform_string_fn == NULL) {
 403     void *lib_handle = os::native_java_library();
 404     _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
 405     if (_to_platform_string_fn == NULL) {
 406       fatal("GetStringPlatformChars missing");
 407     }
 408   }
 409 
 410   char *native_platform_string;
 411   { JavaThread* thread = (JavaThread*)THREAD;
 412     assert(thread->is_Java_thread(), "must be java thread");
 413     JNIEnv *env = thread->jni_environment();
 414     jstring js = (jstring) JNIHandles::make_local(env, java_string());
 415     bool is_copy;
 416     HandleMark hm(thread);
 417     ThreadToNativeFromVM ttn(thread);
 418     native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
 419     assert(is_copy == JNI_TRUE, "is_copy value changed");
 420     JNIHandles::destroy_local(js);
 421   }
 422   return native_platform_string;
 423 }
 424 
 425 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
 426   oop          obj    = java_string();
 427   // Typical usage is to convert all '/' to '.' in string.
 428   typeArrayOop value  = java_lang_String::value(obj);
 429   int          length = java_lang_String::length(obj, value);
 430   bool      is_latin1 = java_lang_String::is_latin1(obj);
 431 
 432   // First check if any from_char exist
 433   int index; // Declared outside, used later
 434   for (index = 0; index < length; index++) {
 435     jchar c = !is_latin1 ? value->char_at(index) :
 436                   ((jchar) value->byte_at(index)) & 0xff;
 437     if (c == from_char) {
 438       break;
 439     }
 440   }
 441   if (index == length) {
 442     // No from_char, so do not copy.
 443     return java_string;
 444   }
 445 
 446   // Check if result string will be latin1
 447   bool to_is_latin1 = false;
 448 
 449   // Replacement char must be latin1
 450   if (CompactStrings && UNICODE::is_latin1(to_char)) {
 451     if (is_latin1) {
 452       // Source string is latin1 as well
 453       to_is_latin1 = true;
 454     } else if (!UNICODE::is_latin1(from_char)) {
 455       // We are replacing an UTF16 char. Scan string to
 456       // check if result can be latin1 encoded.
 457       to_is_latin1 = true;
 458       for (index = 0; index < length; index++) {
 459         jchar c = value->char_at(index);
 460         if (c != from_char && !UNICODE::is_latin1(c)) {
 461           to_is_latin1 = false;
 462           break;
 463         }
 464       }
 465     }
 466   }
 467 
 468   // Create new UNICODE (or byte) buffer. Must handlize value because GC
 469   // may happen during String and char array creation.
 470   typeArrayHandle h_value(THREAD, value);
 471   Handle string = basic_create(length, to_is_latin1, CHECK_NH);
 472   typeArrayOop from_buffer = h_value();
 473   typeArrayOop to_buffer = java_lang_String::value(string());
 474 
 475   // Copy contents
 476   for (index = 0; index < length; index++) {
 477     jchar c = (!is_latin1) ? from_buffer->char_at(index) :
 478                     ((jchar) from_buffer->byte_at(index)) & 0xff;
 479     if (c == from_char) {
 480       c = to_char;
 481     }
 482     if (!to_is_latin1) {
 483       to_buffer->char_at_put(index, c);
 484     } else {
 485       to_buffer->byte_at_put(index, (jbyte) c);
 486     }
 487   }
 488   return string;
 489 }
 490 
 491 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
 492   typeArrayOop value  = java_lang_String::value(java_string);
 493                length = java_lang_String::length(java_string, value);
 494   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 495 
 496   jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
 497   if (result != NULL) {
 498     if (!is_latin1) {
 499       for (int index = 0; index < length; index++) {
 500         result[index] = value->char_at(index);
 501       }
 502     } else {
 503       for (int index = 0; index < length; index++) {
 504         result[index] = ((jchar) value->byte_at(index)) & 0xff;
 505       }
 506     }
 507   } else {
 508     THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
 509   }
 510   return result;
 511 }
 512 
 513 unsigned int java_lang_String::hash_code(oop java_string) {
 514   // The hash and hashIsZero fields are subject to a benign data race,
 515   // making it crucial to ensure that any observable result of the
 516   // calculation in this method stays correct under any possible read of
 517   // these fields. Necessary restrictions to allow this to be correct
 518   // without explicit memory fences or similar concurrency primitives is
 519   // that we can ever only write to one of these two fields for a given
 520   // String instance, and that the computation is idempotent and derived
 521   // from immutable state
 522   assert(initialized && (hash_offset > 0) && (hashIsZero_offset > 0), "Must be initialized");
 523   if (java_lang_String::hash_is_set(java_string)) {
 524     return java_string->int_field(hash_offset);
 525   }
 526 
 527   typeArrayOop value = java_lang_String::value(java_string);
 528   int         length = java_lang_String::length(java_string, value);
 529   bool     is_latin1 = java_lang_String::is_latin1(java_string);
 530 
 531   unsigned int hash = 0;
 532   if (length > 0) {
 533     if (is_latin1) {
 534       hash = java_lang_String::hash_code(value->byte_at_addr(0), length);
 535     } else {
 536       hash = java_lang_String::hash_code(value->char_at_addr(0), length);
 537     }
 538   }
 539 
 540   if (hash != 0) {
 541     java_string->int_field_put(hash_offset, hash);
 542   } else {
 543     java_string->bool_field_put(hashIsZero_offset, true);
 544   }
 545   return hash;
 546 }
 547 
 548 char* java_lang_String::as_quoted_ascii(oop java_string) {
 549   typeArrayOop value  = java_lang_String::value(java_string);
 550   int          length = java_lang_String::length(java_string, value);
 551   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 552 
 553   if (length == 0) return NULL;
 554 
 555   char* result;
 556   int result_length;
 557   if (!is_latin1) {
 558     jchar* base = value->char_at_addr(0);
 559     result_length = UNICODE::quoted_ascii_length(base, length) + 1;
 560     result = NEW_RESOURCE_ARRAY(char, result_length);
 561     UNICODE::as_quoted_ascii(base, length, result, result_length);
 562   } else {
 563     jbyte* base = value->byte_at_addr(0);
 564     result_length = UNICODE::quoted_ascii_length(base, length) + 1;
 565     result = NEW_RESOURCE_ARRAY(char, result_length);
 566     UNICODE::as_quoted_ascii(base, length, result, result_length);
 567   }
 568   assert(result_length >= length + 1, "must not be shorter");
 569   assert(result_length == (int)strlen(result) + 1, "must match");
 570   return result;
 571 }
 572 
 573 Symbol* java_lang_String::as_symbol(oop java_string) {
 574   typeArrayOop value  = java_lang_String::value(java_string);
 575   int          length = java_lang_String::length(java_string, value);
 576   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 577   if (!is_latin1) {
 578     jchar* base = (length == 0) ? NULL : value->char_at_addr(0);
 579     Symbol* sym = SymbolTable::new_symbol(base, length);
 580     return sym;
 581   } else {
 582     ResourceMark rm;
 583     jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
 584     const char* base = UNICODE::as_utf8(position, length);
 585     Symbol* sym = SymbolTable::new_symbol(base, length);
 586     return sym;
 587   }
 588 }
 589 
 590 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
 591   typeArrayOop value  = java_lang_String::value(java_string);
 592   int          length = java_lang_String::length(java_string, value);
 593   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 594   if (!is_latin1) {
 595     jchar* base = (length == 0) ? NULL : value->char_at_addr(0);
 596     return SymbolTable::probe_unicode(base, length);
 597   } else {
 598     ResourceMark rm;
 599     jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
 600     const char* base = UNICODE::as_utf8(position, length);
 601     return SymbolTable::probe(base, length);
 602   }
 603 }
 604 
 605 int java_lang_String::utf8_length(oop java_string, typeArrayOop value) {
 606   assert(value_equals(value, java_lang_String::value(java_string)),
 607          "value must be same as java_lang_String::value(java_string)");
 608   int length = java_lang_String::length(java_string, value);
 609   if (length == 0) {
 610     return 0;
 611   }
 612   if (!java_lang_String::is_latin1(java_string)) {
 613     return UNICODE::utf8_length(value->char_at_addr(0), length);
 614   } else {
 615     return UNICODE::utf8_length(value->byte_at_addr(0), length);
 616   }
 617 }
 618 
 619 int java_lang_String::utf8_length(oop java_string) {
 620   typeArrayOop value = java_lang_String::value(java_string);
 621   return utf8_length(java_string, value);
 622 }
 623 
 624 char* java_lang_String::as_utf8_string(oop java_string) {
 625   typeArrayOop value  = java_lang_String::value(java_string);
 626   int          length = java_lang_String::length(java_string, value);
 627   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 628   if (!is_latin1) {
 629     jchar* position = (length == 0) ? NULL : value->char_at_addr(0);
 630     return UNICODE::as_utf8(position, length);
 631   } else {
 632     jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
 633     return UNICODE::as_utf8(position, length);
 634   }
 635 }
 636 
 637 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, char* buf, int buflen) {
 638   assert(value_equals(value, java_lang_String::value(java_string)),
 639          "value must be same as java_lang_String::value(java_string)");
 640   int     length = java_lang_String::length(java_string, value);
 641   bool is_latin1 = java_lang_String::is_latin1(java_string);
 642   if (!is_latin1) {
 643     jchar* position = (length == 0) ? NULL : value->char_at_addr(0);
 644     return UNICODE::as_utf8(position, length, buf, buflen);
 645   } else {
 646     jbyte* position = (length == 0) ? NULL : value->byte_at_addr(0);
 647     return UNICODE::as_utf8(position, length, buf, buflen);
 648   }
 649 }
 650 
 651 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
 652   typeArrayOop value = java_lang_String::value(java_string);
 653   return as_utf8_string(java_string, value, buf, buflen);
 654 }
 655 
 656 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
 657   typeArrayOop value  = java_lang_String::value(java_string);
 658   bool      is_latin1 = java_lang_String::is_latin1(java_string);
 659   assert(start + len <= java_lang_String::length(java_string), "just checking");
 660   if (!is_latin1) {
 661     jchar* position = value->char_at_addr(start);
 662     return UNICODE::as_utf8(position, len);
 663   } else {
 664     jbyte* position = value->byte_at_addr(start);
 665     return UNICODE::as_utf8(position, len);
 666   }
 667 }
 668 
 669 char* java_lang_String::as_utf8_string(oop java_string, typeArrayOop value, int start, int len, char* buf, int buflen) {
 670   assert(value_equals(value, java_lang_String::value(java_string)),
 671          "value must be same as java_lang_String::value(java_string)");
 672   assert(start + len <= java_lang_String::length(java_string), "just checking");
 673   bool is_latin1 = java_lang_String::is_latin1(java_string);
 674   if (!is_latin1) {
 675     jchar* position = value->char_at_addr(start);
 676     return UNICODE::as_utf8(position, len, buf, buflen);
 677   } else {
 678     jbyte* position = value->byte_at_addr(start);
 679     return UNICODE::as_utf8(position, len, buf, buflen);
 680   }
 681 }
 682 
 683 bool java_lang_String::equals(oop java_string, const jchar* chars, int len) {
 684   assert(java_string->klass() == SystemDictionary::String_klass(),
 685          "must be java_string");
 686   typeArrayOop value = java_lang_String::value_no_keepalive(java_string);
 687   int length = java_lang_String::length(java_string, value);
 688   if (length != len) {
 689     return false;
 690   }
 691   bool is_latin1 = java_lang_String::is_latin1(java_string);
 692   if (!is_latin1) {
 693     for (int i = 0; i < len; i++) {
 694       if (value->char_at(i) != chars[i]) {
 695         return false;
 696       }
 697     }
 698   } else {
 699     for (int i = 0; i < len; i++) {
 700       if ((((jchar) value->byte_at(i)) & 0xff) != chars[i]) {
 701         return false;
 702       }
 703     }
 704   }
 705   return true;
 706 }
 707 
 708 bool java_lang_String::equals(oop str1, oop str2) {
 709   assert(str1->klass() == SystemDictionary::String_klass(),
 710          "must be java String");
 711   assert(str2->klass() == SystemDictionary::String_klass(),
 712          "must be java String");
 713   typeArrayOop value1    = java_lang_String::value_no_keepalive(str1);
 714   bool         is_latin1 = java_lang_String::is_latin1(str1);
 715   typeArrayOop value2    = java_lang_String::value_no_keepalive(str2);
 716   bool         is_latin2 = java_lang_String::is_latin1(str2);
 717 
 718   if (is_latin1 != is_latin2) {
 719     // Strings with different coders are never equal.
 720     return false;
 721   }
 722   return value_equals(value1, value2);
 723 }
 724 
 725 void java_lang_String::print(oop java_string, outputStream* st) {
 726   assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string");
 727   typeArrayOop value  = java_lang_String::value_no_keepalive(java_string);
 728 
 729   if (value == NULL) {
 730     // This can happen if, e.g., printing a String
 731     // object before its initializer has been called
 732     st->print("NULL");
 733     return;
 734   }
 735 
 736   int length = java_lang_String::length(java_string, value);
 737   bool is_latin1 = java_lang_String::is_latin1(java_string);
 738 
 739   st->print("\"");
 740   for (int index = 0; index < length; index++) {
 741     st->print("%c", (!is_latin1) ?  value->char_at(index) :
 742                            ((jchar) value->byte_at(index)) & 0xff );
 743   }
 744   st->print("\"");
 745 }
 746 
 747 
 748 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
 749   assert(mirror.not_null() && fd->is_static(), "just checking");
 750   if (fd->has_initial_value()) {
 751     BasicType t = fd->field_type();
 752     switch (t) {
 753       case T_BYTE:
 754         mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
 755               break;
 756       case T_BOOLEAN:
 757         mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
 758               break;
 759       case T_CHAR:
 760         mirror()->char_field_put(fd->offset(), fd->int_initial_value());
 761               break;
 762       case T_SHORT:
 763         mirror()->short_field_put(fd->offset(), fd->int_initial_value());
 764               break;
 765       case T_INT:
 766         mirror()->int_field_put(fd->offset(), fd->int_initial_value());
 767         break;
 768       case T_FLOAT:
 769         mirror()->float_field_put(fd->offset(), fd->float_initial_value());
 770         break;
 771       case T_DOUBLE:
 772         mirror()->double_field_put(fd->offset(), fd->double_initial_value());
 773         break;
 774       case T_LONG:
 775         mirror()->long_field_put(fd->offset(), fd->long_initial_value());
 776         break;
 777       case T_OBJECT:
 778         {
 779           assert(fd->signature() == vmSymbols::string_signature(),
 780                  "just checking");
 781           if (DumpSharedSpaces && HeapShared::is_archived_object(mirror())) {
 782             // Archive the String field and update the pointer.
 783             oop s = mirror()->obj_field(fd->offset());
 784             oop archived_s = StringTable::create_archived_string(s, CHECK);
 785             mirror()->obj_field_put(fd->offset(), archived_s);
 786           } else {
 787             oop string = fd->string_initial_value(CHECK);
 788             mirror()->obj_field_put(fd->offset(), string);
 789           }
 790         }
 791         break;
 792       default:
 793         THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
 794                   "Illegal ConstantValue attribute in class file");
 795     }
 796   }
 797 }
 798 
 799 
 800 void java_lang_Class::fixup_mirror(Klass* k, TRAPS) {
 801   assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
 802 
 803   // If the offset was read from the shared archive, it was fixed up already
 804   if (!k->is_shared()) {
 805     if (k->is_instance_klass()) {
 806       // During bootstrap, java.lang.Class wasn't loaded so static field
 807       // offsets were computed without the size added it.  Go back and
 808       // update all the static field offsets to included the size.
 809       for (JavaFieldStream fs(InstanceKlass::cast(k)); !fs.done(); fs.next()) {
 810         if (fs.access_flags().is_static()) {
 811           int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields();
 812           fs.set_offset(real_offset);
 813         }
 814       }
 815     }
 816   }
 817 
 818   if (k->is_shared() && k->has_raw_archived_mirror()) {
 819     if (HeapShared::open_archive_heap_region_mapped()) {
 820       bool present = restore_archived_mirror(k, Handle(), Handle(), Handle(), CHECK);
 821       assert(present, "Missing archived mirror for %s", k->external_name());
 822       return;
 823     } else {
 824       k->set_java_mirror_handle(NULL);
 825       k->clear_has_raw_archived_mirror();
 826     }
 827   }
 828   create_mirror(k, Handle(), Handle(), Handle(), CHECK);
 829 }
 830 
 831 void java_lang_Class::initialize_mirror_fields(Klass* k,
 832                                                Handle mirror,
 833                                                Handle protection_domain,
 834                                                TRAPS) {
 835   // Allocate a simple java object for a lock.
 836   // This needs to be a java object because during class initialization
 837   // it can be held across a java call.
 838   typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
 839   set_init_lock(mirror(), r);
 840 
 841   // Set protection domain also
 842   set_protection_domain(mirror(), protection_domain());
 843 
 844   // Initialize static fields
 845   InstanceKlass::cast(k)->do_local_static_fields(&initialize_static_field, mirror, CHECK);
 846 }
 847 
 848 // Set the java.lang.Module module field in the java_lang_Class mirror
 849 void java_lang_Class::set_mirror_module_field(Klass* k, Handle mirror, Handle module, TRAPS) {
 850   if (module.is_null()) {
 851     // During startup, the module may be NULL only if java.base has not been defined yet.
 852     // Put the class on the fixup_module_list to patch later when the java.lang.Module
 853     // for java.base is known. But note that since we captured the NULL module another
 854     // thread may have completed that initialization.
 855 
 856     bool javabase_was_defined = false;
 857     {
 858       MutexLocker m1(Module_lock, THREAD);
 859       // Keep list of classes needing java.base module fixup
 860       if (!ModuleEntryTable::javabase_defined()) {
 861         assert(k->java_mirror() != NULL, "Class's mirror is null");
 862         k->class_loader_data()->inc_keep_alive();
 863         assert(fixup_module_field_list() != NULL, "fixup_module_field_list not initialized");
 864         fixup_module_field_list()->push(k);
 865       } else {
 866         javabase_was_defined = true;
 867       }
 868     }
 869 
 870     // If java.base was already defined then patch this particular class with java.base.
 871     if (javabase_was_defined) {
 872       ModuleEntry *javabase_entry = ModuleEntryTable::javabase_moduleEntry();
 873       assert(javabase_entry != NULL && javabase_entry->module() != NULL,
 874              "Setting class module field, " JAVA_BASE_NAME " should be defined");
 875       Handle javabase_handle(THREAD, javabase_entry->module());
 876       set_module(mirror(), javabase_handle());
 877     }
 878   } else {
 879     assert(Universe::is_module_initialized() ||
 880            (ModuleEntryTable::javabase_defined() &&
 881             (oopDesc::equals(module(), ModuleEntryTable::javabase_moduleEntry()->module()))),
 882            "Incorrect java.lang.Module specification while creating mirror");
 883     set_module(mirror(), module());
 884   }
 885 }
 886 
 887 // Statically allocate fixup lists because they always get created.
 888 void java_lang_Class::allocate_fixup_lists() {
 889   GrowableArray<Klass*>* mirror_list =
 890     new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true);
 891   set_fixup_mirror_list(mirror_list);
 892 
 893   GrowableArray<Klass*>* module_list =
 894     new (ResourceObj::C_HEAP, mtModule) GrowableArray<Klass*>(500, true);
 895   set_fixup_module_field_list(module_list);
 896 }
 897 
 898 void java_lang_Class::create_mirror(Klass* k, Handle class_loader,
 899                                     Handle module, Handle protection_domain, TRAPS) {
 900   assert(k != NULL, "Use create_basic_type_mirror for primitive types");
 901   assert(k->java_mirror() == NULL, "should only assign mirror once");
 902 
 903   // Use this moment of initialization to cache modifier_flags also,
 904   // to support Class.getModifiers().  Instance classes recalculate
 905   // the cached flags after the class file is parsed, but before the
 906   // class is put into the system dictionary.
 907   int computed_modifiers = k->compute_modifier_flags(CHECK);
 908   k->set_modifier_flags(computed_modifiers);
 909   // Class_klass has to be loaded because it is used to allocate
 910   // the mirror.
 911   if (SystemDictionary::Class_klass_loaded()) {
 912     // Allocate mirror (java.lang.Class instance)
 913     oop mirror_oop = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK);
 914     Handle mirror(THREAD, mirror_oop);
 915     Handle comp_mirror;
 916 
 917     // Setup indirection from mirror->klass
 918     java_lang_Class::set_klass(mirror(), k);
 919 
 920     InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
 921     assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
 922 
 923     java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
 924 
 925     // It might also have a component mirror.  This mirror must already exist.
 926     if (k->is_array_klass()) {
 927       if (k->is_typeArray_klass()) {
 928         BasicType type = TypeArrayKlass::cast(k)->element_type();
 929         comp_mirror = Handle(THREAD, Universe::java_mirror(type));
 930       } else {
 931         assert(k->is_objArray_klass(), "Must be");
 932         Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
 933         assert(element_klass != NULL, "Must have an element klass");
 934         comp_mirror = Handle(THREAD, element_klass->java_mirror());
 935       }
 936       assert(comp_mirror() != NULL, "must have a mirror");
 937 
 938       // Two-way link between the array klass and its component mirror:
 939       // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
 940       set_component_mirror(mirror(), comp_mirror());
 941       // See below for ordering dependencies between field array_klass in component mirror
 942       // and java_mirror in this klass.
 943     } else {
 944       assert(k->is_instance_klass(), "Must be");
 945 
 946       initialize_mirror_fields(k, mirror, protection_domain, THREAD);
 947       if (HAS_PENDING_EXCEPTION) {
 948         // If any of the fields throws an exception like OOM remove the klass field
 949         // from the mirror so GC doesn't follow it after the klass has been deallocated.
 950         // This mirror looks like a primitive type, which logically it is because it
 951         // it represents no class.
 952         java_lang_Class::set_klass(mirror(), NULL);
 953         return;
 954       }
 955     }
 956 
 957     // set the classLoader field in the java_lang_Class instance
 958     assert(oopDesc::equals(class_loader(), k->class_loader()), "should be same");
 959     set_class_loader(mirror(), class_loader());
 960 
 961     // Setup indirection from klass->mirror
 962     // after any exceptions can happen during allocations.
 963     k->set_java_mirror(mirror);
 964 
 965     // Set the module field in the java_lang_Class instance.  This must be done
 966     // after the mirror is set.
 967     set_mirror_module_field(k, mirror, module, THREAD);
 968 
 969     if (comp_mirror() != NULL) {
 970       // Set after k->java_mirror() is published, because compiled code running
 971       // concurrently doesn't expect a k to have a null java_mirror.
 972       release_set_array_klass(comp_mirror(), k);
 973     }
 974   } else {
 975     assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized");
 976     fixup_mirror_list()->push(k);
 977   }
 978 }
 979 
 980 #if INCLUDE_CDS_JAVA_HEAP
 981 // Clears mirror fields. Static final fields with initial values are reloaded
 982 // from constant pool. The object identity hash is in the object header and is
 983 // not affected.
 984 class ResetMirrorField: public FieldClosure {
 985  private:
 986   Handle _m;
 987 
 988  public:
 989   ResetMirrorField(Handle mirror) : _m(mirror) {}
 990 
 991   void do_field(fieldDescriptor* fd) {
 992     assert(DumpSharedSpaces, "dump time only");
 993     assert(_m.not_null(), "Mirror cannot be NULL");
 994 
 995     if (fd->is_static() && fd->has_initial_value()) {
 996       initialize_static_field(fd, _m, Thread::current());
 997       return;
 998     }
 999 
1000     BasicType ft = fd->field_type();
1001     switch (ft) {
1002       case T_BYTE:
1003         _m()->byte_field_put(fd->offset(), 0);
1004         break;
1005       case T_CHAR:
1006         _m()->char_field_put(fd->offset(), 0);
1007         break;
1008       case T_DOUBLE:
1009         _m()->double_field_put(fd->offset(), 0);
1010         break;
1011       case T_FLOAT:
1012         _m()->float_field_put(fd->offset(), 0);
1013         break;
1014       case T_INT:
1015         _m()->int_field_put(fd->offset(), 0);
1016         break;
1017       case T_LONG:
1018         _m()->long_field_put(fd->offset(), 0);
1019         break;
1020       case T_SHORT:
1021         _m()->short_field_put(fd->offset(), 0);
1022         break;
1023       case T_BOOLEAN:
1024         _m()->bool_field_put(fd->offset(), false);
1025         break;
1026       case T_ARRAY:
1027       case T_OBJECT: {
1028         // It might be useful to cache the String field, but
1029         // for now just clear out any reference field
1030         oop o = _m()->obj_field(fd->offset());
1031         _m()->obj_field_put(fd->offset(), NULL);
1032         break;
1033       }
1034       default:
1035         ShouldNotReachHere();
1036         break;
1037      }
1038   }
1039 };
1040 
1041 void java_lang_Class::archive_basic_type_mirrors(TRAPS) {
1042   assert(HeapShared::is_heap_object_archiving_allowed(),
1043          "HeapShared::is_heap_object_archiving_allowed() must be true");
1044 
1045   for (int t = 0; t <= T_VOID; t++) {
1046     oop m = Universe::_mirrors[t];
1047     if (m != NULL) {
1048       // Update the field at _array_klass_offset to point to the relocated array klass.
1049       oop archived_m = HeapShared::archive_heap_object(m, THREAD);
1050       assert(archived_m != NULL, "sanity");
1051       Klass *ak = (Klass*)(archived_m->metadata_field(_array_klass_offset));
1052       assert(ak != NULL || t == T_VOID, "should not be NULL");
1053       if (ak != NULL) {
1054         Klass *reloc_ak = MetaspaceShared::get_relocated_klass(ak);
1055         archived_m->metadata_field_put(_array_klass_offset, reloc_ak);
1056       }
1057 
1058       // Clear the fields. Just to be safe
1059       Klass *k = m->klass();
1060       Handle archived_mirror_h(THREAD, archived_m);
1061       ResetMirrorField reset(archived_mirror_h);
1062       InstanceKlass::cast(k)->do_nonstatic_fields(&reset);
1063 
1064       log_trace(cds, heap, mirror)(
1065         "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT,
1066         type2name((BasicType)t), p2i(Universe::_mirrors[t]), p2i(archived_m));
1067 
1068       Universe::_mirrors[t] = archived_m;
1069     }
1070   }
1071 
1072   assert(Universe::_mirrors[T_INT] != NULL &&
1073          Universe::_mirrors[T_FLOAT] != NULL &&
1074          Universe::_mirrors[T_DOUBLE] != NULL &&
1075          Universe::_mirrors[T_BYTE] != NULL &&
1076          Universe::_mirrors[T_BOOLEAN] != NULL &&
1077          Universe::_mirrors[T_CHAR] != NULL &&
1078          Universe::_mirrors[T_LONG] != NULL &&
1079          Universe::_mirrors[T_SHORT] != NULL &&
1080          Universe::_mirrors[T_VOID] != NULL, "sanity");
1081 
1082   Universe::set_int_mirror(Universe::_mirrors[T_INT]);
1083   Universe::set_float_mirror(Universe::_mirrors[T_FLOAT]);
1084   Universe::set_double_mirror(Universe::_mirrors[T_DOUBLE]);
1085   Universe::set_byte_mirror(Universe::_mirrors[T_BYTE]);
1086   Universe::set_bool_mirror(Universe::_mirrors[T_BOOLEAN]);
1087   Universe::set_char_mirror(Universe::_mirrors[T_CHAR]);
1088   Universe::set_long_mirror(Universe::_mirrors[T_LONG]);
1089   Universe::set_short_mirror(Universe::_mirrors[T_SHORT]);
1090   Universe::set_void_mirror(Universe::_mirrors[T_VOID]);
1091 }
1092 
1093 //
1094 // After the mirror object is successfully archived, the archived
1095 // klass is set with _has_archived_raw_mirror flag.
1096 //
1097 // The _has_archived_raw_mirror flag is cleared at runtime when the
1098 // archived mirror is restored. If archived java heap data cannot
1099 // be used at runtime, new mirror object is created for the shared
1100 // class. The _has_archived_raw_mirror is cleared also during the process.
1101 oop java_lang_Class::archive_mirror(Klass* k, TRAPS) {
1102   assert(HeapShared::is_heap_object_archiving_allowed(),
1103          "HeapShared::is_heap_object_archiving_allowed() must be true");
1104 
1105   // Mirror is already archived
1106   if (k->has_raw_archived_mirror()) {
1107     assert(k->archived_java_mirror_raw() != NULL, "no archived mirror");
1108     return k->archived_java_mirror_raw();
1109   }
1110 
1111   // No mirror
1112   oop mirror = k->java_mirror();
1113   if (mirror == NULL) {
1114     return NULL;
1115   }
1116 
1117   if (k->is_instance_klass()) {
1118     InstanceKlass *ik = InstanceKlass::cast(k);
1119     assert(ik->signers() == NULL, "class with signer should have been excluded");
1120 
1121     if (!(ik->is_shared_boot_class() || ik->is_shared_platform_class() ||
1122           ik->is_shared_app_class())) {
1123       // Archiving mirror for classes from non-builtin loaders is not
1124       // supported. Clear the _java_mirror within the archived class.
1125       k->set_java_mirror_handle(NULL);
1126       return NULL;
1127     }
1128   }
1129 
1130   // Now start archiving the mirror object
1131   oop archived_mirror = HeapShared::archive_heap_object(mirror, THREAD);
1132   if (archived_mirror == NULL) {
1133     return NULL;
1134   }
1135 
1136   archived_mirror = process_archived_mirror(k, mirror, archived_mirror, THREAD);
1137   if (archived_mirror == NULL) {
1138     return NULL;
1139   }
1140 
1141   k->set_archived_java_mirror_raw(archived_mirror);
1142 
1143   k->set_has_raw_archived_mirror();
1144 
1145   ResourceMark rm;
1146   log_trace(cds, heap, mirror)(
1147     "Archived %s mirror object from " PTR_FORMAT " ==> " PTR_FORMAT,
1148     k->external_name(), p2i(mirror), p2i(archived_mirror));
1149 
1150   return archived_mirror;
1151 }
1152 
1153 // The process is based on create_mirror().
1154 oop java_lang_Class::process_archived_mirror(Klass* k, oop mirror,
1155                                              oop archived_mirror,
1156                                              Thread *THREAD) {
1157   // Clear nonstatic fields in archived mirror. Some of the fields will be set
1158   // to archived metadata and objects below.
1159   Klass *c = archived_mirror->klass();
1160   Handle archived_mirror_h(THREAD, archived_mirror);
1161   ResetMirrorField reset(archived_mirror_h);
1162   InstanceKlass::cast(c)->do_nonstatic_fields(&reset);
1163 
1164   if (k->is_array_klass()) {
1165     oop archived_comp_mirror;
1166     if (k->is_typeArray_klass()) {
1167       // The primitive type mirrors are already archived. Get the archived mirror.
1168       oop comp_mirror = java_lang_Class::component_mirror(mirror);
1169       archived_comp_mirror = HeapShared::find_archived_heap_object(comp_mirror);
1170       assert(archived_comp_mirror != NULL, "Must be");
1171     } else {
1172       assert(k->is_objArray_klass(), "Must be");
1173       Klass* element_klass = ObjArrayKlass::cast(k)->element_klass();
1174       assert(element_klass != NULL, "Must have an element klass");
1175       archived_comp_mirror = archive_mirror(element_klass, THREAD);
1176       if (archived_comp_mirror == NULL) {
1177         return NULL;
1178       }
1179     }
1180     java_lang_Class::set_component_mirror(archived_mirror, archived_comp_mirror);
1181   } else {
1182     assert(k->is_instance_klass(), "Must be");
1183 
1184     // Reset local static fields in the mirror
1185     InstanceKlass::cast(k)->do_local_static_fields(&reset);
1186 
1187     java_lang_Class:set_init_lock(archived_mirror, NULL);
1188 
1189     set_protection_domain(archived_mirror, NULL);
1190   }
1191 
1192   // clear class loader and mirror_module_field
1193   set_class_loader(archived_mirror, NULL);
1194   set_module(archived_mirror, NULL);
1195 
1196   // The archived mirror's field at _klass_offset is still pointing to the original
1197   // klass. Updated the field in the archived mirror to point to the relocated
1198   // klass in the archive.
1199   Klass *reloc_k = MetaspaceShared::get_relocated_klass(as_Klass(mirror));
1200   log_debug(cds, heap, mirror)(
1201     "Relocate mirror metadata field at _klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT,
1202     p2i(as_Klass(mirror)), p2i(reloc_k));
1203   archived_mirror->metadata_field_put(_klass_offset, reloc_k);
1204 
1205   // The field at _array_klass_offset is pointing to the original one dimension
1206   // higher array klass if exists. Relocate the pointer.
1207   Klass *arr = array_klass_acquire(mirror);
1208   if (arr != NULL) {
1209     Klass *reloc_arr = MetaspaceShared::get_relocated_klass(arr);
1210     log_debug(cds, heap, mirror)(
1211       "Relocate mirror metadata field at _array_klass_offset from " PTR_FORMAT " ==> " PTR_FORMAT,
1212       p2i(arr), p2i(reloc_arr));
1213     archived_mirror->metadata_field_put(_array_klass_offset, reloc_arr);
1214   }
1215   return archived_mirror;
1216 }
1217 
1218 // Returns true if the mirror is updated, false if no archived mirror
1219 // data is present. After the archived mirror object is restored, the
1220 // shared klass' _has_raw_archived_mirror flag is cleared.
1221 bool java_lang_Class::restore_archived_mirror(Klass *k,
1222                                               Handle class_loader, Handle module,
1223                                               Handle protection_domain, TRAPS) {
1224   // Postpone restoring archived mirror until java.lang.Class is loaded. Please
1225   // see more details in SystemDictionary::resolve_well_known_classes().
1226   if (!SystemDictionary::Class_klass_loaded()) {
1227     assert(fixup_mirror_list() != NULL, "fixup_mirror_list not initialized");
1228     fixup_mirror_list()->push(k);
1229     return true;
1230   }
1231 
1232   oop m = HeapShared::materialize_archived_object(k->archived_java_mirror_raw_narrow());
1233 
1234   if (m == NULL) {
1235     return false;
1236   }
1237 
1238   log_debug(cds, mirror)("Archived mirror is: " PTR_FORMAT, p2i(m));
1239 
1240   // mirror is archived, restore
1241   assert(HeapShared::is_archived_object(m), "must be archived mirror object");
1242   Handle mirror(THREAD, m);
1243 
1244   if (!k->is_array_klass()) {
1245     // - local static final fields with initial values were initialized at dump time
1246 
1247     // create the init_lock
1248     typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK_(false));
1249     set_init_lock(mirror(), r);
1250 
1251     if (protection_domain.not_null()) {
1252       set_protection_domain(mirror(), protection_domain());
1253     }
1254   }
1255 
1256   assert(class_loader() == k->class_loader(), "should be same");
1257   if (class_loader.not_null()) {
1258     set_class_loader(mirror(), class_loader());
1259   }
1260 
1261   k->set_java_mirror(mirror);
1262   k->clear_has_raw_archived_mirror();
1263 
1264   set_mirror_module_field(k, mirror, module, THREAD);
1265 
1266   ResourceMark rm;
1267   log_trace(cds, heap, mirror)(
1268     "Restored %s archived mirror " PTR_FORMAT, k->external_name(), p2i(mirror()));
1269 
1270   return true;
1271 }
1272 #endif // INCLUDE_CDS_JAVA_HEAP
1273 
1274 void java_lang_Class::fixup_module_field(Klass* k, Handle module) {
1275   assert(_module_offset != 0, "must have been computed already");
1276   java_lang_Class::set_module(k->java_mirror(), module());
1277 }
1278 
1279 int  java_lang_Class::oop_size(oop java_class) {
1280   assert(_oop_size_offset != 0, "must be set");
1281   int size = java_class->int_field(_oop_size_offset);
1282   assert(size > 0, "Oop size must be greater than zero, not %d", size);
1283   return size;
1284 }
1285 
1286 
1287 void java_lang_Class::set_oop_size(HeapWord* java_class, int size) {
1288   assert(_oop_size_offset != 0, "must be set");
1289   assert(size > 0, "Oop size must be greater than zero, not %d", size);
1290   *(int*)(((char*)java_class) + _oop_size_offset) = size;
1291 }
1292 
1293 int  java_lang_Class::static_oop_field_count(oop java_class) {
1294   assert(_static_oop_field_count_offset != 0, "must be set");
1295   return java_class->int_field(_static_oop_field_count_offset);
1296 }
1297 
1298 int  java_lang_Class::static_oop_field_count_raw(oop java_class) {
1299   assert(_static_oop_field_count_offset != 0, "must be set");
1300   return java_class->int_field_raw(_static_oop_field_count_offset);
1301 }
1302 
1303 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
1304   assert(_static_oop_field_count_offset != 0, "must be set");
1305   java_class->int_field_put(_static_oop_field_count_offset, size);
1306 }
1307 
1308 oop java_lang_Class::protection_domain(oop java_class) {
1309   assert(_protection_domain_offset != 0, "must be set");
1310   return java_class->obj_field(_protection_domain_offset);
1311 }
1312 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
1313   assert(_protection_domain_offset != 0, "must be set");
1314   java_class->obj_field_put(_protection_domain_offset, pd);
1315 }
1316 
1317 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
1318   assert(_component_mirror_offset != 0, "must be set");
1319     java_class->obj_field_put(_component_mirror_offset, comp_mirror);
1320   }
1321 oop java_lang_Class::component_mirror(oop java_class) {
1322   assert(_component_mirror_offset != 0, "must be set");
1323   return java_class->obj_field(_component_mirror_offset);
1324 }
1325 
1326 oop java_lang_Class::init_lock(oop java_class) {
1327   assert(_init_lock_offset != 0, "must be set");
1328   return java_class->obj_field(_init_lock_offset);
1329 }
1330 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
1331   assert(_init_lock_offset != 0, "must be set");
1332   java_class->obj_field_put(_init_lock_offset, init_lock);
1333 }
1334 
1335 objArrayOop java_lang_Class::signers(oop java_class) {
1336   assert(_signers_offset != 0, "must be set");
1337   return (objArrayOop)java_class->obj_field(_signers_offset);
1338 }
1339 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
1340   assert(_signers_offset != 0, "must be set");
1341   java_class->obj_field_put(_signers_offset, (oop)signers);
1342 }
1343 
1344 
1345 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
1346   // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet.
1347   if (_class_loader_offset != 0) {
1348     java_class->obj_field_put(_class_loader_offset, loader);
1349   }
1350 }
1351 
1352 oop java_lang_Class::class_loader(oop java_class) {
1353   assert(_class_loader_offset != 0, "must be set");
1354   return java_class->obj_field(_class_loader_offset);
1355 }
1356 
1357 oop java_lang_Class::module(oop java_class) {
1358   assert(_module_offset != 0, "must be set");
1359   return java_class->obj_field(_module_offset);
1360 }
1361 
1362 void java_lang_Class::set_module(oop java_class, oop module) {
1363   assert(_module_offset != 0, "must be set");
1364   java_class->obj_field_put(_module_offset, module);
1365 }
1366 
1367 oop java_lang_Class::name(Handle java_class, TRAPS) {
1368   assert(_name_offset != 0, "must be set");
1369   oop o = java_class->obj_field(_name_offset);
1370   if (o == NULL) {
1371     o = StringTable::intern(java_lang_Class::as_external_name(java_class()), THREAD);
1372     java_class->obj_field_put(_name_offset, o);
1373   }
1374   return o;
1375 }
1376 
1377 oop java_lang_Class::source_file(oop java_class) {
1378   assert(_source_file_offset != 0, "must be set");
1379   return java_class->obj_field(_source_file_offset);
1380 }
1381 
1382 void java_lang_Class::set_source_file(oop java_class, oop source_file) {
1383   assert(_source_file_offset != 0, "must be set");
1384   java_class->obj_field_put(_source_file_offset, source_file);
1385 }
1386 
1387 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
1388   // This should be improved by adding a field at the Java level or by
1389   // introducing a new VM klass (see comment in ClassFileParser)
1390   oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0);
1391   if (type != T_VOID) {
1392     Klass* aklass = Universe::typeArrayKlassObj(type);
1393     assert(aklass != NULL, "correct bootstrap");
1394     release_set_array_klass(java_class, aklass);
1395   }
1396 #ifdef ASSERT
1397   InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass());
1398   assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
1399 #endif
1400   return java_class;
1401 }
1402 
1403 
1404 Klass* java_lang_Class::as_Klass(oop java_class) {
1405   //%note memory_2
1406   assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1407   Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
1408   assert(k == NULL || k->is_klass(), "type check");
1409   return k;
1410 }
1411 
1412 Klass* java_lang_Class::as_Klass_raw(oop java_class) {
1413   //%note memory_2
1414   assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1415   Klass* k = ((Klass*)java_class->metadata_field_raw(_klass_offset));
1416   assert(k == NULL || k->is_klass(), "type check");
1417   return k;
1418 }
1419 
1420 
1421 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
1422   assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1423   java_class->metadata_field_put(_klass_offset, klass);
1424 }
1425 
1426 
1427 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
1428   assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1429   Symbol* name = NULL;
1430   bool is_instance = false;
1431   if (is_primitive(java_class)) {
1432     name = vmSymbols::type_signature(primitive_type(java_class));
1433   } else {
1434     Klass* k = as_Klass(java_class);
1435     is_instance = k->is_instance_klass();
1436     name = k->name();
1437   }
1438   if (name == NULL) {
1439     st->print("<null>");
1440     return;
1441   }
1442   if (is_instance)  st->print("L");
1443   st->write((char*) name->base(), (int) name->utf8_length());
1444   if (is_instance)  st->print(";");
1445 }
1446 
1447 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found) {
1448   assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1449   Symbol* name;
1450   if (is_primitive(java_class)) {
1451     name = vmSymbols::type_signature(primitive_type(java_class));
1452     // Because this can create a new symbol, the caller has to decrement
1453     // the refcount, so make adjustment here and below for symbols returned
1454     // that are not created or incremented due to a successful lookup.
1455     name->increment_refcount();
1456   } else {
1457     Klass* k = as_Klass(java_class);
1458     if (!k->is_instance_klass()) {
1459       name = k->name();
1460       name->increment_refcount();
1461     } else {
1462       ResourceMark rm;
1463       const char* sigstr = k->signature_name();
1464       int         siglen = (int) strlen(sigstr);
1465       if (!intern_if_not_found) {
1466         name = SymbolTable::probe(sigstr, siglen);
1467       } else {
1468         name = SymbolTable::new_symbol(sigstr, siglen);
1469       }
1470     }
1471   }
1472   return name;
1473 }
1474 
1475 // Returns the Java name for this Java mirror (Resource allocated)
1476 // See Klass::external_name().
1477 // For primitive type Java mirrors, its type name is returned.
1478 const char* java_lang_Class::as_external_name(oop java_class) {
1479   assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1480   const char* name = NULL;
1481   if (is_primitive(java_class)) {
1482     name = type2name(primitive_type(java_class));
1483   } else {
1484     name = as_Klass(java_class)->external_name();
1485   }
1486   if (name == NULL) {
1487     name = "<null>";
1488   }
1489   return name;
1490 }
1491 
1492 Klass* java_lang_Class::array_klass_acquire(oop java_class) {
1493   Klass* k = ((Klass*)java_class->metadata_field_acquire(_array_klass_offset));
1494   assert(k == NULL || k->is_klass() && k->is_array_klass(), "should be array klass");
1495   return k;
1496 }
1497 
1498 
1499 void java_lang_Class::release_set_array_klass(oop java_class, Klass* klass) {
1500   assert(klass->is_klass() && klass->is_array_klass(), "should be array klass");
1501   java_class->release_metadata_field_put(_array_klass_offset, klass);
1502 }
1503 
1504 
1505 BasicType java_lang_Class::primitive_type(oop java_class) {
1506   assert(java_lang_Class::is_primitive(java_class), "just checking");
1507   Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
1508   BasicType type = T_VOID;
1509   if (ak != NULL) {
1510     // Note: create_basic_type_mirror above initializes ak to a non-null value.
1511     type = ArrayKlass::cast(ak)->element_type();
1512   } else {
1513     assert(oopDesc::equals(java_class, Universe::void_mirror()), "only valid non-array primitive");
1514   }
1515   assert(oopDesc::equals(Universe::java_mirror(type), java_class), "must be consistent");
1516   return type;
1517 }
1518 
1519 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
1520   assert(java_lang_Class::is_instance(java_class), "must be a Class object");
1521   if (is_primitive(java_class)) {
1522     if (reference_klass != NULL)
1523       (*reference_klass) = NULL;
1524     return primitive_type(java_class);
1525   } else {
1526     if (reference_klass != NULL)
1527       (*reference_klass) = as_Klass(java_class);
1528     return T_OBJECT;
1529   }
1530 }
1531 
1532 
1533 oop java_lang_Class::primitive_mirror(BasicType t) {
1534   oop mirror = Universe::java_mirror(t);
1535   assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
1536   assert(java_lang_Class::is_primitive(mirror), "must be primitive");
1537   return mirror;
1538 }
1539 
1540 bool java_lang_Class::offsets_computed = false;
1541 int  java_lang_Class::classRedefinedCount_offset = -1;
1542 
1543 #define CLASS_FIELDS_DO(macro) \
1544   macro(classRedefinedCount_offset, k, "classRedefinedCount", int_signature,         false) ; \
1545   macro(_class_loader_offset,       k, "classLoader",         classloader_signature, false); \
1546   macro(_component_mirror_offset,   k, "componentType",       class_signature,       false); \
1547   macro(_module_offset,             k, "module",              module_signature,      false); \
1548   macro(_name_offset,               k, "name",                string_signature,      false); \
1549 
1550 void java_lang_Class::compute_offsets() {
1551   if (offsets_computed) {
1552     return;
1553   }
1554 
1555   offsets_computed = true;
1556 
1557   InstanceKlass* k = SystemDictionary::Class_klass();
1558   CLASS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1559 
1560   // Init lock is a C union with component_mirror.  Only instanceKlass mirrors have
1561   // init_lock and only ArrayKlass mirrors have component_mirror.  Since both are oops
1562   // GC treats them the same.
1563   _init_lock_offset = _component_mirror_offset;
1564 
1565   CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
1566 }
1567 
1568 #if INCLUDE_CDS
1569 void java_lang_Class::serialize_offsets(SerializeClosure* f) {
1570   f->do_bool(&offsets_computed);
1571   f->do_u4((u4*)&_init_lock_offset);
1572 
1573   CLASS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1574 
1575   CLASS_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
1576 }
1577 #endif
1578 
1579 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
1580   if (classRedefinedCount_offset == -1) {
1581     // If we don't have an offset for it then just return -1 as a marker.
1582     return -1;
1583   }
1584 
1585   return the_class_mirror->int_field(classRedefinedCount_offset);
1586 }
1587 
1588 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
1589   if (classRedefinedCount_offset == -1) {
1590     // If we don't have an offset for it then nothing to set.
1591     return;
1592   }
1593 
1594   the_class_mirror->int_field_put(classRedefinedCount_offset, value);
1595 }
1596 
1597 
1598 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
1599 //       platform thread structure, and a eetop offset which was used for thread
1600 //       local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
1601 //       merged, so in the HotSpot VM we just use the eetop field for the thread
1602 //       instead of the privateInfo_offset.
1603 //
1604 // Note: The stackSize field is only present starting in 1.4.
1605 
1606 int java_lang_Thread::_name_offset = 0;
1607 int java_lang_Thread::_group_offset = 0;
1608 int java_lang_Thread::_contextClassLoader_offset = 0;
1609 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
1610 int java_lang_Thread::_priority_offset = 0;
1611 int java_lang_Thread::_eetop_offset = 0;
1612 int java_lang_Thread::_daemon_offset = 0;
1613 int java_lang_Thread::_stillborn_offset = 0;
1614 int java_lang_Thread::_stackSize_offset = 0;
1615 int java_lang_Thread::_tid_offset = 0;
1616 int java_lang_Thread::_thread_status_offset = 0;
1617 int java_lang_Thread::_park_blocker_offset = 0;
1618 
1619 #define THREAD_FIELDS_DO(macro) \
1620   macro(_name_offset,          k, vmSymbols::name_name(), string_signature, false); \
1621   macro(_group_offset,         k, vmSymbols::group_name(), threadgroup_signature, false); \
1622   macro(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), classloader_signature, false); \
1623   macro(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), accesscontrolcontext_signature, false); \
1624   macro(_priority_offset,      k, vmSymbols::priority_name(), int_signature, false); \
1625   macro(_daemon_offset,        k, vmSymbols::daemon_name(), bool_signature, false); \
1626   macro(_eetop_offset,         k, "eetop", long_signature, false); \
1627   macro(_stillborn_offset,     k, "stillborn", bool_signature, false); \
1628   macro(_stackSize_offset,     k, "stackSize", long_signature, false); \
1629   macro(_tid_offset,           k, "tid", long_signature, false); \
1630   macro(_thread_status_offset, k, "threadStatus", int_signature, false); \
1631   macro(_park_blocker_offset,  k, "parkBlocker", object_signature, false)
1632 
1633 void java_lang_Thread::compute_offsets() {
1634   assert(_group_offset == 0, "offsets should be initialized only once");
1635 
1636   InstanceKlass* k = SystemDictionary::Thread_klass();
1637   THREAD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1638 }
1639 
1640 #if INCLUDE_CDS
1641 void java_lang_Thread::serialize_offsets(SerializeClosure* f) {
1642   THREAD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1643 }
1644 #endif
1645 
1646 JavaThread* java_lang_Thread::thread(oop java_thread) {
1647   return (JavaThread*)java_thread->address_field(_eetop_offset);
1648 }
1649 
1650 
1651 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
1652   java_thread->address_field_put(_eetop_offset, (address)thread);
1653 }
1654 
1655 
1656 oop java_lang_Thread::name(oop java_thread) {
1657   return java_thread->obj_field(_name_offset);
1658 }
1659 
1660 
1661 void java_lang_Thread::set_name(oop java_thread, oop name) {
1662   java_thread->obj_field_put(_name_offset, name);
1663 }
1664 
1665 
1666 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1667   return (ThreadPriority)java_thread->int_field(_priority_offset);
1668 }
1669 
1670 
1671 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1672   java_thread->int_field_put(_priority_offset, priority);
1673 }
1674 
1675 
1676 oop java_lang_Thread::threadGroup(oop java_thread) {
1677   return java_thread->obj_field(_group_offset);
1678 }
1679 
1680 
1681 bool java_lang_Thread::is_stillborn(oop java_thread) {
1682   return java_thread->bool_field(_stillborn_offset) != 0;
1683 }
1684 
1685 
1686 // We never have reason to turn the stillborn bit off
1687 void java_lang_Thread::set_stillborn(oop java_thread) {
1688   java_thread->bool_field_put(_stillborn_offset, true);
1689 }
1690 
1691 
1692 bool java_lang_Thread::is_alive(oop java_thread) {
1693   JavaThread* thr = java_lang_Thread::thread(java_thread);
1694   return (thr != NULL);
1695 }
1696 
1697 
1698 bool java_lang_Thread::is_daemon(oop java_thread) {
1699   return java_thread->bool_field(_daemon_offset) != 0;
1700 }
1701 
1702 
1703 void java_lang_Thread::set_daemon(oop java_thread) {
1704   java_thread->bool_field_put(_daemon_offset, true);
1705 }
1706 
1707 oop java_lang_Thread::context_class_loader(oop java_thread) {
1708   return java_thread->obj_field(_contextClassLoader_offset);
1709 }
1710 
1711 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1712   return java_thread->obj_field(_inheritedAccessControlContext_offset);
1713 }
1714 
1715 
1716 jlong java_lang_Thread::stackSize(oop java_thread) {
1717   return java_thread->long_field(_stackSize_offset);
1718 }
1719 
1720 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1721 void java_lang_Thread::set_thread_status(oop java_thread,
1722                                          java_lang_Thread::ThreadStatus status) {
1723   java_thread->int_field_put(_thread_status_offset, status);
1724 }
1725 
1726 // Read thread status value from threadStatus field in java.lang.Thread java class.
1727 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1728   // Make sure the caller is operating on behalf of the VM or is
1729   // running VM code (state == _thread_in_vm).
1730   assert(Threads_lock->owned_by_self() || Thread::current()->is_VM_thread() ||
1731          JavaThread::current()->thread_state() == _thread_in_vm,
1732          "Java Thread is not running in vm");
1733   return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1734 }
1735 
1736 
1737 jlong java_lang_Thread::thread_id(oop java_thread) {
1738   return java_thread->long_field(_tid_offset);
1739 }
1740 
1741 oop java_lang_Thread::park_blocker(oop java_thread) {
1742   return java_thread->obj_field(_park_blocker_offset);
1743 }
1744 
1745 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1746   ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1747   switch (status) {
1748     case NEW                      : return "NEW";
1749     case RUNNABLE                 : return "RUNNABLE";
1750     case SLEEPING                 : return "TIMED_WAITING (sleeping)";
1751     case IN_OBJECT_WAIT           : return "WAITING (on object monitor)";
1752     case IN_OBJECT_WAIT_TIMED     : return "TIMED_WAITING (on object monitor)";
1753     case PARKED                   : return "WAITING (parking)";
1754     case PARKED_TIMED             : return "TIMED_WAITING (parking)";
1755     case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1756     case TERMINATED               : return "TERMINATED";
1757     default                       : return "UNKNOWN";
1758   };
1759 }
1760 int java_lang_ThreadGroup::_parent_offset = 0;
1761 int java_lang_ThreadGroup::_name_offset = 0;
1762 int java_lang_ThreadGroup::_threads_offset = 0;
1763 int java_lang_ThreadGroup::_groups_offset = 0;
1764 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1765 int java_lang_ThreadGroup::_destroyed_offset = 0;
1766 int java_lang_ThreadGroup::_daemon_offset = 0;
1767 int java_lang_ThreadGroup::_nthreads_offset = 0;
1768 int java_lang_ThreadGroup::_ngroups_offset = 0;
1769 
1770 oop  java_lang_ThreadGroup::parent(oop java_thread_group) {
1771   assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1772   return java_thread_group->obj_field(_parent_offset);
1773 }
1774 
1775 // ("name as oop" accessor is not necessary)
1776 
1777 const char* java_lang_ThreadGroup::name(oop java_thread_group) {
1778   oop name = java_thread_group->obj_field(_name_offset);
1779   // ThreadGroup.name can be null
1780   if (name != NULL) {
1781     return java_lang_String::as_utf8_string(name);
1782   }
1783   return NULL;
1784 }
1785 
1786 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1787   assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1788   return java_thread_group->int_field(_nthreads_offset);
1789 }
1790 
1791 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1792   oop threads = java_thread_group->obj_field(_threads_offset);
1793   assert(threads != NULL, "threadgroups should have threads");
1794   assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1795   return objArrayOop(threads);
1796 }
1797 
1798 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1799   assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1800   return java_thread_group->int_field(_ngroups_offset);
1801 }
1802 
1803 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1804   oop groups = java_thread_group->obj_field(_groups_offset);
1805   assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1806   return objArrayOop(groups);
1807 }
1808 
1809 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1810   assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1811   return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1812 }
1813 
1814 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1815   assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1816   return java_thread_group->bool_field(_destroyed_offset) != 0;
1817 }
1818 
1819 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1820   assert(oopDesc::is_oop(java_thread_group), "thread group must be oop");
1821   return java_thread_group->bool_field(_daemon_offset) != 0;
1822 }
1823 
1824 #define THREADGROUP_FIELDS_DO(macro) \
1825   macro(_parent_offset,      k, vmSymbols::parent_name(),      threadgroup_signature,       false); \
1826   macro(_name_offset,        k, vmSymbols::name_name(),        string_signature,            false); \
1827   macro(_threads_offset,     k, vmSymbols::threads_name(),     thread_array_signature,      false); \
1828   macro(_groups_offset,      k, vmSymbols::groups_name(),      threadgroup_array_signature, false); \
1829   macro(_maxPriority_offset, k, vmSymbols::maxPriority_name(), int_signature,               false); \
1830   macro(_destroyed_offset,   k, vmSymbols::destroyed_name(),   bool_signature,              false); \
1831   macro(_daemon_offset,      k, vmSymbols::daemon_name(),      bool_signature,              false); \
1832   macro(_nthreads_offset,    k, vmSymbols::nthreads_name(),    int_signature,               false); \
1833   macro(_ngroups_offset,     k, vmSymbols::ngroups_name(),     int_signature,               false)
1834 
1835 void java_lang_ThreadGroup::compute_offsets() {
1836   assert(_parent_offset == 0, "offsets should be initialized only once");
1837 
1838   InstanceKlass* k = SystemDictionary::ThreadGroup_klass();
1839   THREADGROUP_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1840 }
1841 
1842 #if INCLUDE_CDS
1843 void java_lang_ThreadGroup::serialize_offsets(SerializeClosure* f) {
1844   THREADGROUP_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1845 }
1846 #endif
1847 
1848 #define THROWABLE_FIELDS_DO(macro) \
1849   macro(backtrace_offset,     k, "backtrace",     object_signature,                  false); \
1850   macro(detailMessage_offset, k, "detailMessage", string_signature,                  false); \
1851   macro(stackTrace_offset,    k, "stackTrace",    java_lang_StackTraceElement_array, false); \
1852   macro(depth_offset,         k, "depth",         int_signature,                     false); \
1853   macro(static_unassigned_stacktrace_offset, k, "UNASSIGNED_STACK", java_lang_StackTraceElement_array, true)
1854 
1855 void java_lang_Throwable::compute_offsets() {
1856   InstanceKlass* k = SystemDictionary::Throwable_klass();
1857   THROWABLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
1858 }
1859 
1860 #if INCLUDE_CDS
1861 void java_lang_Throwable::serialize_offsets(SerializeClosure* f) {
1862   THROWABLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
1863 }
1864 #endif
1865 
1866 oop java_lang_Throwable::unassigned_stacktrace() {
1867   InstanceKlass* ik = SystemDictionary::Throwable_klass();
1868   oop base = ik->static_field_base_raw();
1869   return base->obj_field(static_unassigned_stacktrace_offset);
1870 }
1871 
1872 oop java_lang_Throwable::backtrace(oop throwable) {
1873   return throwable->obj_field_acquire(backtrace_offset);
1874 }
1875 
1876 
1877 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1878   throwable->release_obj_field_put(backtrace_offset, value);
1879 }
1880 
1881 int java_lang_Throwable::depth(oop throwable) {
1882   return throwable->int_field(depth_offset);
1883 }
1884 
1885 void java_lang_Throwable::set_depth(oop throwable, int value) {
1886   throwable->int_field_put(depth_offset, value);
1887 }
1888 
1889 oop java_lang_Throwable::message(oop throwable) {
1890   return throwable->obj_field(detailMessage_offset);
1891 }
1892 
1893 
1894 // Return Symbol for detailed_message or NULL
1895 Symbol* java_lang_Throwable::detail_message(oop throwable) {
1896   PRESERVE_EXCEPTION_MARK;  // Keep original exception
1897   oop detailed_message = java_lang_Throwable::message(throwable);
1898   if (detailed_message != NULL) {
1899     return java_lang_String::as_symbol(detailed_message);
1900   }
1901   return NULL;
1902 }
1903 
1904 void java_lang_Throwable::set_message(oop throwable, oop value) {
1905   throwable->obj_field_put(detailMessage_offset, value);
1906 }
1907 
1908 
1909 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
1910   throwable->obj_field_put(stackTrace_offset, st_element_array);
1911 }
1912 
1913 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1914   set_stacktrace(throwable, NULL);
1915 }
1916 
1917 
1918 void java_lang_Throwable::print(oop throwable, outputStream* st) {
1919   ResourceMark rm;
1920   Klass* k = throwable->klass();
1921   assert(k != NULL, "just checking");
1922   st->print("%s", k->external_name());
1923   oop msg = message(throwable);
1924   if (msg != NULL) {
1925     st->print(": %s", java_lang_String::as_utf8_string(msg));
1926   }
1927 }
1928 
1929 // After this many redefines, the stack trace is unreliable.
1930 const int MAX_VERSION = USHRT_MAX;
1931 
1932 static inline bool version_matches(Method* method, int version) {
1933   assert(version < MAX_VERSION, "version is too big");
1934   return method != NULL && (method->constants()->version() == version);
1935 }
1936 
1937 
1938 // This class provides a simple wrapper over the internal structure of
1939 // exception backtrace to insulate users of the backtrace from needing
1940 // to know what it looks like.
1941 class BacktraceBuilder: public StackObj {
1942  friend class BacktraceIterator;
1943  private:
1944   Handle          _backtrace;
1945   objArrayOop     _head;
1946   typeArrayOop    _methods;
1947   typeArrayOop    _bcis;
1948   objArrayOop     _mirrors;
1949   typeArrayOop    _names; // needed to insulate method name against redefinition
1950   int             _index;
1951   NoSafepointVerifier _nsv;
1952 
1953   enum {
1954     trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1955     trace_bcis_offset    = java_lang_Throwable::trace_bcis_offset,
1956     trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
1957     trace_names_offset   = java_lang_Throwable::trace_names_offset,
1958     trace_next_offset    = java_lang_Throwable::trace_next_offset,
1959     trace_size           = java_lang_Throwable::trace_size,
1960     trace_chunk_size     = java_lang_Throwable::trace_chunk_size
1961   };
1962 
1963   // get info out of chunks
1964   static typeArrayOop get_methods(objArrayHandle chunk) {
1965     typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
1966     assert(methods != NULL, "method array should be initialized in backtrace");
1967     return methods;
1968   }
1969   static typeArrayOop get_bcis(objArrayHandle chunk) {
1970     typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1971     assert(bcis != NULL, "bci array should be initialized in backtrace");
1972     return bcis;
1973   }
1974   static objArrayOop get_mirrors(objArrayHandle chunk) {
1975     objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
1976     assert(mirrors != NULL, "mirror array should be initialized in backtrace");
1977     return mirrors;
1978   }
1979   static typeArrayOop get_names(objArrayHandle chunk) {
1980     typeArrayOop names = typeArrayOop(chunk->obj_at(trace_names_offset));
1981     assert(names != NULL, "names array should be initialized in backtrace");
1982     return names;
1983   }
1984 
1985  public:
1986 
1987   // constructor for new backtrace
1988   BacktraceBuilder(TRAPS): _head(NULL), _methods(NULL), _bcis(NULL), _mirrors(NULL), _names(NULL) {
1989     expand(CHECK);
1990     _backtrace = Handle(THREAD, _head);
1991     _index = 0;
1992   }
1993 
1994   BacktraceBuilder(Thread* thread, objArrayHandle backtrace) {
1995     _methods = get_methods(backtrace);
1996     _bcis = get_bcis(backtrace);
1997     _mirrors = get_mirrors(backtrace);
1998     _names = get_names(backtrace);
1999     assert(_methods->length() == _bcis->length() &&
2000            _methods->length() == _mirrors->length() &&
2001            _mirrors->length() == _names->length(),
2002            "method and source information arrays should match");
2003 
2004     // head is the preallocated backtrace
2005     _head = backtrace();
2006     _backtrace = Handle(thread, _head);
2007     _index = 0;
2008   }
2009 
2010   void expand(TRAPS) {
2011     objArrayHandle old_head(THREAD, _head);
2012     PauseNoSafepointVerifier pnsv(&_nsv);
2013 
2014     objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
2015     objArrayHandle new_head(THREAD, head);
2016 
2017     typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
2018     typeArrayHandle new_methods(THREAD, methods);
2019 
2020     typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
2021     typeArrayHandle new_bcis(THREAD, bcis);
2022 
2023     objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
2024     objArrayHandle new_mirrors(THREAD, mirrors);
2025 
2026     typeArrayOop names = oopFactory::new_symbolArray(trace_chunk_size, CHECK);
2027     typeArrayHandle new_names(THREAD, names);
2028 
2029     if (!old_head.is_null()) {
2030       old_head->obj_at_put(trace_next_offset, new_head());
2031     }
2032     new_head->obj_at_put(trace_methods_offset, new_methods());
2033     new_head->obj_at_put(trace_bcis_offset, new_bcis());
2034     new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
2035     new_head->obj_at_put(trace_names_offset, new_names());
2036 
2037     _head    = new_head();
2038     _methods = new_methods();
2039     _bcis = new_bcis();
2040     _mirrors = new_mirrors();
2041     _names  = new_names();
2042     _index = 0;
2043   }
2044 
2045   oop backtrace() {
2046     return _backtrace();
2047   }
2048 
2049   inline void push(Method* method, int bci, TRAPS) {
2050     // Smear the -1 bci to 0 since the array only holds unsigned
2051     // shorts.  The later line number lookup would just smear the -1
2052     // to a 0 even if it could be recorded.
2053     if (bci == SynchronizationEntryBCI) bci = 0;
2054 
2055     if (_index >= trace_chunk_size) {
2056       methodHandle mhandle(THREAD, method);
2057       expand(CHECK);
2058       method = mhandle();
2059     }
2060 
2061     _methods->ushort_at_put(_index, method->orig_method_idnum());
2062     _bcis->int_at_put(_index, Backtrace::merge_bci_and_version(bci, method->constants()->version()));
2063 
2064     // Note:this doesn't leak symbols because the mirror in the backtrace keeps the
2065     // klass owning the symbols alive so their refcounts aren't decremented.
2066     Symbol* name = method->name();
2067     _names->symbol_at_put(_index, name);
2068 
2069     // We need to save the mirrors in the backtrace to keep the class
2070     // from being unloaded while we still have this stack trace.
2071     assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
2072     _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
2073     _index++;
2074   }
2075 
2076 };
2077 
2078 struct BacktraceElement : public StackObj {
2079   int _method_id;
2080   int _bci;
2081   int _version;
2082   Symbol* _name;
2083   Handle _mirror;
2084   BacktraceElement(Handle mirror, int mid, int version, int bci, Symbol* name) :
2085                    _method_id(mid), _bci(bci), _version(version), _name(name), _mirror(mirror) {}
2086 };
2087 
2088 class BacktraceIterator : public StackObj {
2089   int _index;
2090   objArrayHandle  _result;
2091   objArrayHandle  _mirrors;
2092   typeArrayHandle _methods;
2093   typeArrayHandle _bcis;
2094   typeArrayHandle _names;
2095 
2096   void init(objArrayHandle result, Thread* thread) {
2097     // Get method id, bci, version and mirror from chunk
2098     _result = result;
2099     if (_result.not_null()) {
2100       _methods = typeArrayHandle(thread, BacktraceBuilder::get_methods(_result));
2101       _bcis = typeArrayHandle(thread, BacktraceBuilder::get_bcis(_result));
2102       _mirrors = objArrayHandle(thread, BacktraceBuilder::get_mirrors(_result));
2103       _names = typeArrayHandle(thread, BacktraceBuilder::get_names(_result));
2104       _index = 0;
2105     }
2106   }
2107  public:
2108   BacktraceIterator(objArrayHandle result, Thread* thread) {
2109     init(result, thread);
2110     assert(_methods.is_null() || _methods->length() == java_lang_Throwable::trace_chunk_size, "lengths don't match");
2111   }
2112 
2113   BacktraceElement next(Thread* thread) {
2114     BacktraceElement e (Handle(thread, _mirrors->obj_at(_index)),
2115                         _methods->ushort_at(_index),
2116                         Backtrace::version_at(_bcis->int_at(_index)),
2117                         Backtrace::bci_at(_bcis->int_at(_index)),
2118                         _names->symbol_at(_index));
2119     _index++;
2120 
2121     if (_index >= java_lang_Throwable::trace_chunk_size) {
2122       int next_offset = java_lang_Throwable::trace_next_offset;
2123       // Get next chunk
2124       objArrayHandle result (thread, objArrayOop(_result->obj_at(next_offset)));
2125       init(result, thread);
2126     }
2127     return e;
2128   }
2129 
2130   bool repeat() {
2131     return _result.not_null() && _mirrors->obj_at(_index) != NULL;
2132   }
2133 };
2134 
2135 
2136 // Print stack trace element to resource allocated buffer
2137 static void print_stack_element_to_stream(outputStream* st, Handle mirror, int method_id,
2138                                           int version, int bci, Symbol* name) {
2139   ResourceMark rm;
2140 
2141   // Get strings and string lengths
2142   InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2143   const char* klass_name  = holder->external_name();
2144   int buf_len = (int)strlen(klass_name);
2145 
2146   char* method_name = name->as_C_string();
2147   buf_len += (int)strlen(method_name);
2148 
2149   char* source_file_name = NULL;
2150   Symbol* source = Backtrace::get_source_file_name(holder, version);
2151   if (source != NULL) {
2152     source_file_name = source->as_C_string();
2153     buf_len += (int)strlen(source_file_name);
2154   }
2155 
2156   char *module_name = NULL, *module_version = NULL;
2157   ModuleEntry* module = holder->module();
2158   if (module->is_named()) {
2159     module_name = module->name()->as_C_string();
2160     buf_len += (int)strlen(module_name);
2161     if (module->version() != NULL) {
2162       module_version = module->version()->as_C_string();
2163       buf_len += (int)strlen(module_version);
2164     }
2165   }
2166 
2167   // Allocate temporary buffer with extra space for formatting and line number
2168   char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
2169 
2170   // Print stack trace line in buffer
2171   sprintf(buf, "\tat %s.%s(", klass_name, method_name);
2172 
2173   // Print module information
2174   if (module_name != NULL) {
2175     if (module_version != NULL) {
2176       sprintf(buf + (int)strlen(buf), "%s@%s/", module_name, module_version);
2177     } else {
2178       sprintf(buf + (int)strlen(buf), "%s/", module_name);
2179     }
2180   }
2181 
2182   // The method can be NULL if the requested class version is gone
2183   Method* method = holder->method_with_orig_idnum(method_id, version);
2184   if (!version_matches(method, version)) {
2185     strcat(buf, "Redefined)");
2186   } else {
2187     int line_number = Backtrace::get_line_number(method, bci);
2188     if (line_number == -2) {
2189       strcat(buf, "Native Method)");
2190     } else {
2191       if (source_file_name != NULL && (line_number != -1)) {
2192         // Sourcename and linenumber
2193         sprintf(buf + (int)strlen(buf), "%s:%d)", source_file_name, line_number);
2194       } else if (source_file_name != NULL) {
2195         // Just sourcename
2196         sprintf(buf + (int)strlen(buf), "%s)", source_file_name);
2197       } else {
2198         // Neither sourcename nor linenumber
2199         sprintf(buf + (int)strlen(buf), "Unknown Source)");
2200       }
2201       CompiledMethod* nm = method->code();
2202       if (WizardMode && nm != NULL) {
2203         sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
2204       }
2205     }
2206   }
2207 
2208   st->print_cr("%s", buf);
2209 }
2210 
2211 void java_lang_Throwable::print_stack_element(outputStream *st, const methodHandle& method, int bci) {
2212   Handle mirror (Thread::current(),  method->method_holder()->java_mirror());
2213   int method_id = method->orig_method_idnum();
2214   int version = method->constants()->version();
2215   print_stack_element_to_stream(st, mirror, method_id, version, bci, method->name());
2216 }
2217 
2218 /**
2219  * Print the throwable message and its stack trace plus all causes by walking the
2220  * cause chain.  The output looks the same as of Throwable.printStackTrace().
2221  */
2222 void java_lang_Throwable::print_stack_trace(Handle throwable, outputStream* st) {
2223   // First, print the message.
2224   print(throwable(), st);
2225   st->cr();
2226 
2227   // Now print the stack trace.
2228   Thread* THREAD = Thread::current();
2229   while (throwable.not_null()) {
2230     objArrayHandle result (THREAD, objArrayOop(backtrace(throwable())));
2231     if (result.is_null()) {
2232       st->print_raw_cr("\t<<no stack trace available>>");
2233       return;
2234     }
2235     BacktraceIterator iter(result, THREAD);
2236 
2237     while (iter.repeat()) {
2238       BacktraceElement bte = iter.next(THREAD);
2239       print_stack_element_to_stream(st, bte._mirror, bte._method_id, bte._version, bte._bci, bte._name);
2240     }
2241     {
2242       // Call getCause() which doesn't necessarily return the _cause field.
2243       EXCEPTION_MARK;
2244       JavaValue cause(T_OBJECT);
2245       JavaCalls::call_virtual(&cause,
2246                               throwable,
2247                               throwable->klass(),
2248                               vmSymbols::getCause_name(),
2249                               vmSymbols::void_throwable_signature(),
2250                               THREAD);
2251       // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
2252       if (HAS_PENDING_EXCEPTION) {
2253         CLEAR_PENDING_EXCEPTION;
2254         throwable = Handle();
2255       } else {
2256         throwable = Handle(THREAD, (oop) cause.get_jobject());
2257         if (throwable.not_null()) {
2258           st->print("Caused by: ");
2259           print(throwable(), st);
2260           st->cr();
2261         }
2262       }
2263     }
2264   }
2265 }
2266 
2267 /**
2268  * Print the throwable stack trace by calling the Java method java.lang.Throwable.printStackTrace().
2269  */
2270 void java_lang_Throwable::java_printStackTrace(Handle throwable, TRAPS) {
2271   assert(throwable->is_a(SystemDictionary::Throwable_klass()), "Throwable instance expected");
2272   JavaValue result(T_VOID);
2273   JavaCalls::call_virtual(&result,
2274                           throwable,
2275                           SystemDictionary::Throwable_klass(),
2276                           vmSymbols::printStackTrace_name(),
2277                           vmSymbols::void_method_signature(),
2278                           THREAD);
2279 }
2280 
2281 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method, TRAPS) {
2282   if (!StackTraceInThrowable) return;
2283   ResourceMark rm(THREAD);
2284 
2285   // Start out by clearing the backtrace for this object, in case the VM
2286   // runs out of memory while allocating the stack trace
2287   set_backtrace(throwable(), NULL);
2288   // Clear lazily constructed Java level stacktrace if refilling occurs
2289   // This is unnecessary in 1.7+ but harmless
2290   clear_stacktrace(throwable());
2291 
2292   int max_depth = MaxJavaStackTraceDepth;
2293   JavaThread* thread = (JavaThread*)THREAD;
2294 
2295   BacktraceBuilder bt(CHECK);
2296 
2297   // If there is no Java frame just return the method that was being called
2298   // with bci 0
2299   if (!thread->has_last_Java_frame()) {
2300     if (max_depth >= 1 && method() != NULL) {
2301       bt.push(method(), 0, CHECK);
2302       log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), 1);
2303       set_depth(throwable(), 1);
2304       set_backtrace(throwable(), bt.backtrace());
2305     }
2306     return;
2307   }
2308 
2309   // Instead of using vframe directly, this version of fill_in_stack_trace
2310   // basically handles everything by hand. This significantly improved the
2311   // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
2312   // See bug 6333838 for  more details.
2313   // The "ASSERT" here is to verify this method generates the exactly same stack
2314   // trace as utilizing vframe.
2315 #ifdef ASSERT
2316   vframeStream st(thread);
2317   methodHandle st_method(THREAD, st.method());
2318 #endif
2319   int total_count = 0;
2320   RegisterMap map(thread, false);
2321   int decode_offset = 0;
2322   CompiledMethod* nm = NULL;
2323   bool skip_fillInStackTrace_check = false;
2324   bool skip_throwableInit_check = false;
2325   bool skip_hidden = !ShowHiddenFrames;
2326 
2327   for (frame fr = thread->last_frame(); max_depth == 0 || max_depth != total_count;) {
2328     Method* method = NULL;
2329     int bci = 0;
2330 
2331     // Compiled java method case.
2332     if (decode_offset != 0) {
2333       DebugInfoReadStream stream(nm, decode_offset);
2334       decode_offset = stream.read_int();
2335       method = (Method*)nm->metadata_at(stream.read_int());
2336       bci = stream.read_bci();
2337     } else {
2338       if (fr.is_first_frame()) break;
2339       address pc = fr.pc();
2340       if (fr.is_interpreted_frame()) {
2341         address bcp = fr.interpreter_frame_bcp();
2342         method = fr.interpreter_frame_method();
2343         bci =  method->bci_from(bcp);
2344         fr = fr.sender(&map);
2345       } else {
2346         CodeBlob* cb = fr.cb();
2347         // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
2348         // but non nmethod
2349         fr = fr.sender(&map);
2350         if (cb == NULL || !cb->is_compiled()) {
2351           continue;
2352         }
2353         nm = cb->as_compiled_method();
2354         if (nm->method()->is_native()) {
2355           method = nm->method();
2356           bci = 0;
2357         } else {
2358           PcDesc* pd = nm->pc_desc_at(pc);
2359           decode_offset = pd->scope_decode_offset();
2360           // if decode_offset is not equal to 0, it will execute the
2361           // "compiled java method case" at the beginning of the loop.
2362           continue;
2363         }
2364       }
2365     }
2366 #ifdef ASSERT
2367     assert(st_method() == method && st.bci() == bci,
2368            "Wrong stack trace");
2369     st.next();
2370     // vframeStream::method isn't GC-safe so store off a copy
2371     // of the Method* in case we GC.
2372     if (!st.at_end()) {
2373       st_method = st.method();
2374     }
2375 #endif
2376 
2377     // the format of the stacktrace will be:
2378     // - 1 or more fillInStackTrace frames for the exception class (skipped)
2379     // - 0 or more <init> methods for the exception class (skipped)
2380     // - rest of the stack
2381 
2382     if (!skip_fillInStackTrace_check) {
2383       if (method->name() == vmSymbols::fillInStackTrace_name() &&
2384           throwable->is_a(method->method_holder())) {
2385         continue;
2386       }
2387       else {
2388         skip_fillInStackTrace_check = true; // gone past them all
2389       }
2390     }
2391     if (!skip_throwableInit_check) {
2392       assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
2393 
2394       // skip <init> methods of the exception class and superclasses
2395       // This is simlar to classic VM.
2396       if (method->name() == vmSymbols::object_initializer_name() &&
2397           throwable->is_a(method->method_holder())) {
2398         continue;
2399       } else {
2400         // there are none or we've seen them all - either way stop checking
2401         skip_throwableInit_check = true;
2402       }
2403     }
2404     if (method->is_hidden()) {
2405       if (skip_hidden)  continue;
2406     }
2407     bt.push(method, bci, CHECK);
2408     total_count++;
2409   }
2410 
2411   log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), total_count);
2412 
2413   // Put completed stack trace into throwable object
2414   set_backtrace(throwable(), bt.backtrace());
2415   set_depth(throwable(), total_count);
2416 }
2417 
2418 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, const methodHandle& method) {
2419   // No-op if stack trace is disabled
2420   if (!StackTraceInThrowable) {
2421     return;
2422   }
2423 
2424   // Disable stack traces for some preallocated out of memory errors
2425   if (!Universe::should_fill_in_stack_trace(throwable)) {
2426     return;
2427   }
2428 
2429   PRESERVE_EXCEPTION_MARK;
2430 
2431   JavaThread* thread = JavaThread::active();
2432   fill_in_stack_trace(throwable, method, thread);
2433   // ignore exceptions thrown during stack trace filling
2434   CLEAR_PENDING_EXCEPTION;
2435 }
2436 
2437 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
2438   // Allocate stack trace - backtrace is created but not filled in
2439 
2440   // No-op if stack trace is disabled
2441   if (!StackTraceInThrowable) return;
2442   BacktraceBuilder bt(CHECK);   // creates a backtrace
2443   set_backtrace(throwable(), bt.backtrace());
2444 }
2445 
2446 
2447 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
2448   // Fill in stack trace into preallocated backtrace (no GC)
2449 
2450   // No-op if stack trace is disabled
2451   if (!StackTraceInThrowable) return;
2452 
2453   assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
2454 
2455   JavaThread* THREAD = JavaThread::current();
2456 
2457   objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
2458   assert(backtrace.not_null(), "backtrace should have been preallocated");
2459 
2460   ResourceMark rm(THREAD);
2461   vframeStream st(THREAD);
2462 
2463   BacktraceBuilder bt(THREAD, backtrace);
2464 
2465   // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
2466   // methods as preallocated errors aren't created by "java" code.
2467 
2468   // fill in as much stack trace as possible
2469   int chunk_count = 0;
2470   for (;!st.at_end(); st.next()) {
2471     bt.push(st.method(), st.bci(), CHECK);
2472     chunk_count++;
2473 
2474     // Bail-out for deep stacks
2475     if (chunk_count >= trace_chunk_size) break;
2476   }
2477   set_depth(throwable(), chunk_count);
2478   log_info(stacktrace)("%s, %d", throwable->klass()->external_name(), chunk_count);
2479 
2480   // We support the Throwable immutability protocol defined for Java 7.
2481   java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
2482   assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
2483 }
2484 
2485 void java_lang_Throwable::get_stack_trace_elements(Handle throwable,
2486                                                    objArrayHandle stack_trace_array_h, TRAPS) {
2487 
2488   if (throwable.is_null() || stack_trace_array_h.is_null()) {
2489     THROW(vmSymbols::java_lang_NullPointerException());
2490   }
2491 
2492   assert(stack_trace_array_h->is_objArray(), "Stack trace array should be an array of StackTraceElenent");
2493 
2494   if (stack_trace_array_h->length() != depth(throwable())) {
2495     THROW(vmSymbols::java_lang_IndexOutOfBoundsException());
2496   }
2497 
2498   objArrayHandle result(THREAD, objArrayOop(backtrace(throwable())));
2499   BacktraceIterator iter(result, THREAD);
2500 
2501   int index = 0;
2502   while (iter.repeat()) {
2503     BacktraceElement bte = iter.next(THREAD);
2504 
2505     Handle stack_trace_element(THREAD, stack_trace_array_h->obj_at(index++));
2506 
2507     if (stack_trace_element.is_null()) {
2508       THROW(vmSymbols::java_lang_NullPointerException());
2509     }
2510 
2511     InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(bte._mirror()));
2512     methodHandle method (THREAD, holder->method_with_orig_idnum(bte._method_id, bte._version));
2513 
2514     java_lang_StackTraceElement::fill_in(stack_trace_element, holder,
2515                                          method,
2516                                          bte._version,
2517                                          bte._bci,
2518                                          bte._name, CHECK);
2519   }
2520 }
2521 
2522 oop java_lang_StackTraceElement::create(const methodHandle& method, int bci, TRAPS) {
2523   // Allocate java.lang.StackTraceElement instance
2524   InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
2525   assert(k != NULL, "must be loaded in 1.4+");
2526   if (k->should_be_initialized()) {
2527     k->initialize(CHECK_0);
2528   }
2529 
2530   Handle element = k->allocate_instance_handle(CHECK_0);
2531 
2532   int version = method->constants()->version();
2533   fill_in(element, method->method_holder(), method, version, bci, method->name(), CHECK_0);
2534   return element();
2535 }
2536 
2537 void java_lang_StackTraceElement::fill_in(Handle element,
2538                                           InstanceKlass* holder, const methodHandle& method,
2539                                           int version, int bci, Symbol* name, TRAPS) {
2540   assert(element->is_a(SystemDictionary::StackTraceElement_klass()), "sanity check");
2541 
2542   ResourceMark rm(THREAD);
2543   HandleMark hm(THREAD);
2544 
2545   // Fill in class name
2546   Handle java_class(THREAD, holder->java_mirror());
2547   oop classname = java_lang_Class::name(java_class, CHECK);
2548   java_lang_StackTraceElement::set_declaringClass(element(), classname);
2549   java_lang_StackTraceElement::set_declaringClassObject(element(), java_class());
2550 
2551   oop loader = holder->class_loader();
2552   if (loader != NULL) {
2553     oop loader_name = java_lang_ClassLoader::name(loader);
2554     if (loader_name != NULL)
2555       java_lang_StackTraceElement::set_classLoaderName(element(), loader_name);
2556   }
2557 
2558   // Fill in method name
2559   oop methodname = StringTable::intern(name, CHECK);
2560   java_lang_StackTraceElement::set_methodName(element(), methodname);
2561 
2562   // Fill in module name and version
2563   ModuleEntry* module = holder->module();
2564   if (module->is_named()) {
2565     oop module_name = StringTable::intern(module->name(), CHECK);
2566     java_lang_StackTraceElement::set_moduleName(element(), module_name);
2567     oop module_version;
2568     if (module->version() != NULL) {
2569       module_version = StringTable::intern(module->version(), CHECK);
2570     } else {
2571       module_version = NULL;
2572     }
2573     java_lang_StackTraceElement::set_moduleVersion(element(), module_version);
2574   }
2575 
2576   if (method() == NULL || !version_matches(method(), version)) {
2577     // The method was redefined, accurate line number information isn't available
2578     java_lang_StackTraceElement::set_fileName(element(), NULL);
2579     java_lang_StackTraceElement::set_lineNumber(element(), -1);
2580   } else {
2581     // Fill in source file name and line number.
2582     Symbol* source = Backtrace::get_source_file_name(holder, version);
2583     oop source_file = java_lang_Class::source_file(java_class());
2584     if (source != NULL) {
2585       // Class was not redefined. We can trust its cache if set,
2586       // else we have to initialize it.
2587       if (source_file == NULL) {
2588         source_file = StringTable::intern(source, CHECK);
2589         java_lang_Class::set_source_file(java_class(), source_file);
2590       }
2591     } else {
2592       // Class was redefined. Dump the cache if it was set.
2593       if (source_file != NULL) {
2594         source_file = NULL;
2595         java_lang_Class::set_source_file(java_class(), source_file);
2596       }
2597     }
2598     java_lang_StackTraceElement::set_fileName(element(), source_file);
2599 
2600     int line_number = Backtrace::get_line_number(method, bci);
2601     java_lang_StackTraceElement::set_lineNumber(element(), line_number);
2602   }
2603 }
2604 
2605 #if INCLUDE_JVMCI
2606 void java_lang_StackTraceElement::decode(Handle mirror, methodHandle method, int bci, Symbol*& methodname, Symbol*& filename, int& line_number) {
2607   int method_id = method->orig_method_idnum();
2608   int cpref = method->name_index();
2609   decode(mirror, method_id, method->constants()->version(), bci, cpref, methodname, filename, line_number);
2610 }
2611 
2612 void java_lang_StackTraceElement::decode(Handle mirror, int method_id, int version, int bci, int cpref, Symbol*& methodname, Symbol*& filename, int& line_number) {
2613   // Fill in class name
2614   InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
2615   Method* method = holder->method_with_orig_idnum(method_id, version);
2616 
2617   // The method can be NULL if the requested class version is gone
2618   Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref);
2619 
2620   // Fill in method name
2621   methodname = sym;
2622 
2623   if (!version_matches(method, version)) {
2624     // If the method was redefined, accurate line number information isn't available
2625     filename = NULL;
2626     line_number = -1;
2627   } else {
2628     // Fill in source file name and line number.
2629     // Use a specific ik version as a holder since the mirror might
2630     // refer to a version that is now obsolete and no longer accessible
2631     // via the previous versions list.
2632     holder = holder->get_klass_version(version);
2633     assert(holder != NULL, "sanity check");
2634     filename = holder->source_file_name();
2635     line_number = Backtrace::get_line_number(method, bci);
2636   }
2637 }
2638 #endif // INCLUDE_JVMCI
2639 
2640 Method* java_lang_StackFrameInfo::get_method(Handle stackFrame, InstanceKlass* holder, TRAPS) {
2641   HandleMark hm(THREAD);
2642   Handle mname(THREAD, stackFrame->obj_field(_memberName_offset));
2643   Method* method = (Method*)java_lang_invoke_MemberName::vmtarget(mname());
2644   // we should expand MemberName::name when Throwable uses StackTrace
2645   // MethodHandles::expand_MemberName(mname, MethodHandles::_suppress_defc|MethodHandles::_suppress_type, CHECK_NULL);
2646   return method;
2647 }
2648 
2649 void java_lang_StackFrameInfo::set_method_and_bci(Handle stackFrame, const methodHandle& method, int bci, TRAPS) {
2650   // set Method* or mid/cpref
2651   HandleMark hm(THREAD);
2652   Handle mname(Thread::current(), stackFrame->obj_field(_memberName_offset));
2653   InstanceKlass* ik = method->method_holder();
2654   CallInfo info(method(), ik, CHECK);
2655   MethodHandles::init_method_MemberName(mname, info);
2656   // set bci
2657   java_lang_StackFrameInfo::set_bci(stackFrame(), bci);
2658   // method may be redefined; store the version
2659   int version = method->constants()->version();
2660   assert((jushort)version == version, "version should be short");
2661   java_lang_StackFrameInfo::set_version(stackFrame(), (short)version);
2662 }
2663 
2664 void java_lang_StackFrameInfo::to_stack_trace_element(Handle stackFrame, Handle stack_trace_element, TRAPS) {
2665   ResourceMark rm(THREAD);
2666   HandleMark hm(THREAD);
2667   Handle mname(THREAD, stackFrame->obj_field(java_lang_StackFrameInfo::_memberName_offset));
2668   Klass* clazz = java_lang_Class::as_Klass(java_lang_invoke_MemberName::clazz(mname()));
2669   InstanceKlass* holder = InstanceKlass::cast(clazz);
2670   Method* method = java_lang_StackFrameInfo::get_method(stackFrame, holder, CHECK);
2671 
2672   short version = stackFrame->short_field(_version_offset);
2673   int bci = stackFrame->int_field(_bci_offset);
2674   Symbol* name = method->name();
2675   java_lang_StackTraceElement::fill_in(stack_trace_element, holder, method, version, bci, name, CHECK);
2676 }
2677 
2678 #define STACKFRAMEINFO_FIELDS_DO(macro) \
2679   macro(_memberName_offset,     k, "memberName",  object_signature, false); \
2680   macro(_bci_offset,            k, "bci",         int_signature,    false)
2681 
2682 void java_lang_StackFrameInfo::compute_offsets() {
2683   InstanceKlass* k = SystemDictionary::StackFrameInfo_klass();
2684   STACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2685   STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2686 }
2687 
2688 #if INCLUDE_CDS
2689 void java_lang_StackFrameInfo::serialize_offsets(SerializeClosure* f) {
2690   STACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2691   STACKFRAMEINFO_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
2692 }
2693 #endif
2694 
2695 #define LIVESTACKFRAMEINFO_FIELDS_DO(macro) \
2696   macro(_monitors_offset,   k, "monitors",    object_array_signature, false); \
2697   macro(_locals_offset,     k, "locals",      object_array_signature, false); \
2698   macro(_operands_offset,   k, "operands",    object_array_signature, false); \
2699   macro(_mode_offset,       k, "mode",        int_signature,          false)
2700 
2701 void java_lang_LiveStackFrameInfo::compute_offsets() {
2702   InstanceKlass* k = SystemDictionary::LiveStackFrameInfo_klass();
2703   LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2704 }
2705 
2706 #if INCLUDE_CDS
2707 void java_lang_LiveStackFrameInfo::serialize_offsets(SerializeClosure* f) {
2708   LIVESTACKFRAMEINFO_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2709 }
2710 #endif
2711 
2712 #define ACCESSIBLEOBJECT_FIELDS_DO(macro) \
2713   macro(override_offset, k, "override", bool_signature, false)
2714 
2715 void java_lang_reflect_AccessibleObject::compute_offsets() {
2716   InstanceKlass* k = SystemDictionary::reflect_AccessibleObject_klass();
2717   ACCESSIBLEOBJECT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2718 }
2719 
2720 #if INCLUDE_CDS
2721 void java_lang_reflect_AccessibleObject::serialize_offsets(SerializeClosure* f) {
2722   ACCESSIBLEOBJECT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2723 }
2724 #endif
2725 
2726 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
2727   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2728   return (jboolean) reflect->bool_field(override_offset);
2729 }
2730 
2731 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
2732   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2733   reflect->bool_field_put(override_offset, (int) value);
2734 }
2735 
2736 #define METHOD_FIELDS_DO(macro) \
2737   macro(clazz_offset,          k, vmSymbols::clazz_name(),          class_signature,       false); \
2738   macro(name_offset,           k, vmSymbols::name_name(),           string_signature,      false); \
2739   macro(returnType_offset,     k, vmSymbols::returnType_name(),     class_signature,       false); \
2740   macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
2741   macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
2742   macro(slot_offset,           k, vmSymbols::slot_name(),           int_signature,         false); \
2743   macro(modifiers_offset,      k, vmSymbols::modifiers_name(),      int_signature,         false); \
2744   macro(signature_offset,             k, vmSymbols::signature_name(),             string_signature,     false); \
2745   macro(annotations_offset,           k, vmSymbols::annotations_name(),           byte_array_signature, false); \
2746   macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false); \
2747   macro(annotation_default_offset,    k, vmSymbols::annotation_default_name(),    byte_array_signature, false);
2748 
2749 void java_lang_reflect_Method::compute_offsets() {
2750   InstanceKlass* k = SystemDictionary::reflect_Method_klass();
2751   METHOD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2752 }
2753 
2754 #if INCLUDE_CDS
2755 void java_lang_reflect_Method::serialize_offsets(SerializeClosure* f) {
2756   METHOD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2757 }
2758 #endif
2759 
2760 Handle java_lang_reflect_Method::create(TRAPS) {
2761   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2762   Klass* klass = SystemDictionary::reflect_Method_klass();
2763   // This class is eagerly initialized during VM initialization, since we keep a refence
2764   // to one of the methods
2765   assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
2766   return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
2767 }
2768 
2769 oop java_lang_reflect_Method::clazz(oop reflect) {
2770   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2771   return reflect->obj_field(clazz_offset);
2772 }
2773 
2774 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
2775   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2776    reflect->obj_field_put(clazz_offset, value);
2777 }
2778 
2779 int java_lang_reflect_Method::slot(oop reflect) {
2780   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2781   return reflect->int_field(slot_offset);
2782 }
2783 
2784 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
2785   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2786   reflect->int_field_put(slot_offset, value);
2787 }
2788 
2789 void java_lang_reflect_Method::set_name(oop method, oop value) {
2790   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2791   method->obj_field_put(name_offset, value);
2792 }
2793 
2794 oop java_lang_reflect_Method::return_type(oop method) {
2795   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2796   return method->obj_field(returnType_offset);
2797 }
2798 
2799 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
2800   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2801   method->obj_field_put(returnType_offset, value);
2802 }
2803 
2804 oop java_lang_reflect_Method::parameter_types(oop method) {
2805   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2806   return method->obj_field(parameterTypes_offset);
2807 }
2808 
2809 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
2810   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2811   method->obj_field_put(parameterTypes_offset, value);
2812 }
2813 
2814 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
2815   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2816   method->obj_field_put(exceptionTypes_offset, value);
2817 }
2818 
2819 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
2820   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2821   method->int_field_put(modifiers_offset, value);
2822 }
2823 
2824 void java_lang_reflect_Method::set_signature(oop method, oop value) {
2825   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2826   method->obj_field_put(signature_offset, value);
2827 }
2828 
2829 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
2830   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2831   method->obj_field_put(annotations_offset, value);
2832 }
2833 
2834 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
2835   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2836   method->obj_field_put(parameter_annotations_offset, value);
2837 }
2838 
2839 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
2840   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2841   method->obj_field_put(annotation_default_offset, value);
2842 }
2843 
2844 #define CONSTRUCTOR_FIELDS_DO(macro) \
2845   macro(clazz_offset,          k, vmSymbols::clazz_name(),          class_signature,       false); \
2846   macro(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), class_array_signature, false); \
2847   macro(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), class_array_signature, false); \
2848   macro(slot_offset,           k, vmSymbols::slot_name(),           int_signature,         false); \
2849   macro(modifiers_offset,      k, vmSymbols::modifiers_name(),      int_signature,         false); \
2850   macro(signature_offset,             k, vmSymbols::signature_name(),             string_signature,     false); \
2851   macro(annotations_offset,           k, vmSymbols::annotations_name(),           byte_array_signature, false); \
2852   macro(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), byte_array_signature, false);
2853 
2854 void java_lang_reflect_Constructor::compute_offsets() {
2855   InstanceKlass* k = SystemDictionary::reflect_Constructor_klass();
2856   CONSTRUCTOR_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2857 }
2858 
2859 #if INCLUDE_CDS
2860 void java_lang_reflect_Constructor::serialize_offsets(SerializeClosure* f) {
2861   CONSTRUCTOR_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2862 }
2863 #endif
2864 
2865 Handle java_lang_reflect_Constructor::create(TRAPS) {
2866   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2867   Symbol* name = vmSymbols::java_lang_reflect_Constructor();
2868   Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2869   InstanceKlass* ik = InstanceKlass::cast(k);
2870   // Ensure it is initialized
2871   ik->initialize(CHECK_NH);
2872   return ik->allocate_instance_handle(THREAD);
2873 }
2874 
2875 oop java_lang_reflect_Constructor::clazz(oop reflect) {
2876   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2877   return reflect->obj_field(clazz_offset);
2878 }
2879 
2880 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
2881   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2882    reflect->obj_field_put(clazz_offset, value);
2883 }
2884 
2885 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
2886   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2887   return constructor->obj_field(parameterTypes_offset);
2888 }
2889 
2890 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
2891   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2892   constructor->obj_field_put(parameterTypes_offset, value);
2893 }
2894 
2895 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
2896   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2897   constructor->obj_field_put(exceptionTypes_offset, value);
2898 }
2899 
2900 int java_lang_reflect_Constructor::slot(oop reflect) {
2901   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2902   return reflect->int_field(slot_offset);
2903 }
2904 
2905 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
2906   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2907   reflect->int_field_put(slot_offset, value);
2908 }
2909 
2910 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
2911   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2912   constructor->int_field_put(modifiers_offset, value);
2913 }
2914 
2915 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
2916   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2917   constructor->obj_field_put(signature_offset, value);
2918 }
2919 
2920 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
2921   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2922   constructor->obj_field_put(annotations_offset, value);
2923 }
2924 
2925 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
2926   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2927   method->obj_field_put(parameter_annotations_offset, value);
2928 }
2929 
2930 #define FIELD_FIELDS_DO(macro) \
2931   macro(clazz_offset,     k, vmSymbols::clazz_name(),     class_signature,  false); \
2932   macro(name_offset,      k, vmSymbols::name_name(),      string_signature, false); \
2933   macro(type_offset,      k, vmSymbols::type_name(),      class_signature,  false); \
2934   macro(slot_offset,      k, vmSymbols::slot_name(),      int_signature,    false); \
2935   macro(modifiers_offset, k, vmSymbols::modifiers_name(), int_signature,    false); \
2936   macro(signature_offset,        k, vmSymbols::signature_name(),        string_signature,     false); \
2937   macro(annotations_offset,      k, vmSymbols::annotations_name(),      byte_array_signature, false);
2938 
2939 void java_lang_reflect_Field::compute_offsets() {
2940   InstanceKlass* k = SystemDictionary::reflect_Field_klass();
2941   FIELD_FIELDS_DO(FIELD_COMPUTE_OFFSET);
2942 }
2943 
2944 #if INCLUDE_CDS
2945 void java_lang_reflect_Field::serialize_offsets(SerializeClosure* f) {
2946   FIELD_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
2947 }
2948 #endif
2949 
2950 Handle java_lang_reflect_Field::create(TRAPS) {
2951   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2952   Symbol* name = vmSymbols::java_lang_reflect_Field();
2953   Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2954   InstanceKlass* ik = InstanceKlass::cast(k);
2955   // Ensure it is initialized
2956   ik->initialize(CHECK_NH);
2957   return ik->allocate_instance_handle(THREAD);
2958 }
2959 
2960 oop java_lang_reflect_Field::clazz(oop reflect) {
2961   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2962   return reflect->obj_field(clazz_offset);
2963 }
2964 
2965 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
2966   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2967    reflect->obj_field_put(clazz_offset, value);
2968 }
2969 
2970 oop java_lang_reflect_Field::name(oop field) {
2971   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2972   return field->obj_field(name_offset);
2973 }
2974 
2975 void java_lang_reflect_Field::set_name(oop field, oop value) {
2976   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2977   field->obj_field_put(name_offset, value);
2978 }
2979 
2980 oop java_lang_reflect_Field::type(oop field) {
2981   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2982   return field->obj_field(type_offset);
2983 }
2984 
2985 void java_lang_reflect_Field::set_type(oop field, oop value) {
2986   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2987   field->obj_field_put(type_offset, value);
2988 }
2989 
2990 int java_lang_reflect_Field::slot(oop reflect) {
2991   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2992   return reflect->int_field(slot_offset);
2993 }
2994 
2995 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
2996   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2997   reflect->int_field_put(slot_offset, value);
2998 }
2999 
3000 int java_lang_reflect_Field::modifiers(oop field) {
3001   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3002   return field->int_field(modifiers_offset);
3003 }
3004 
3005 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
3006   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3007   field->int_field_put(modifiers_offset, value);
3008 }
3009 
3010 void java_lang_reflect_Field::set_signature(oop field, oop value) {
3011   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3012   field->obj_field_put(signature_offset, value);
3013 }
3014 
3015 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
3016   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3017   field->obj_field_put(annotations_offset, value);
3018 }
3019 
3020 #define CONSTANTPOOL_FIELDS_DO(macro) \
3021   macro(_oop_offset, k, "constantPoolOop", object_signature, false)
3022 
3023 void reflect_ConstantPool::compute_offsets() {
3024   InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass();
3025   // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
3026   CONSTANTPOOL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3027 }
3028 
3029 #if INCLUDE_CDS
3030 void reflect_ConstantPool::serialize_offsets(SerializeClosure* f) {
3031   CONSTANTPOOL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3032 }
3033 #endif
3034 
3035 #define PARAMETER_FIELDS_DO(macro) \
3036   macro(name_offset,        k, vmSymbols::name_name(),        string_signature, false); \
3037   macro(modifiers_offset,   k, vmSymbols::modifiers_name(),   int_signature,    false); \
3038   macro(index_offset,       k, vmSymbols::index_name(),       int_signature,    false); \
3039   macro(executable_offset,  k, vmSymbols::executable_name(),  executable_signature, false)
3040 
3041 void java_lang_reflect_Parameter::compute_offsets() {
3042   InstanceKlass* k = SystemDictionary::reflect_Parameter_klass();
3043   PARAMETER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3044 }
3045 
3046 #if INCLUDE_CDS
3047 void java_lang_reflect_Parameter::serialize_offsets(SerializeClosure* f) {
3048   PARAMETER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3049 }
3050 #endif
3051 
3052 Handle java_lang_reflect_Parameter::create(TRAPS) {
3053   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3054   Symbol* name = vmSymbols::java_lang_reflect_Parameter();
3055   Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
3056   InstanceKlass* ik = InstanceKlass::cast(k);
3057   // Ensure it is initialized
3058   ik->initialize(CHECK_NH);
3059   return ik->allocate_instance_handle(THREAD);
3060 }
3061 
3062 oop java_lang_reflect_Parameter::name(oop param) {
3063   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3064   return param->obj_field(name_offset);
3065 }
3066 
3067 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
3068   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3069   param->obj_field_put(name_offset, value);
3070 }
3071 
3072 int java_lang_reflect_Parameter::modifiers(oop param) {
3073   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3074   return param->int_field(modifiers_offset);
3075 }
3076 
3077 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
3078   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3079   param->int_field_put(modifiers_offset, value);
3080 }
3081 
3082 int java_lang_reflect_Parameter::index(oop param) {
3083   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3084   return param->int_field(index_offset);
3085 }
3086 
3087 void java_lang_reflect_Parameter::set_index(oop param, int value) {
3088   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3089   param->int_field_put(index_offset, value);
3090 }
3091 
3092 oop java_lang_reflect_Parameter::executable(oop param) {
3093   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3094   return param->obj_field(executable_offset);
3095 }
3096 
3097 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
3098   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3099   param->obj_field_put(executable_offset, value);
3100 }
3101 
3102 
3103 int java_lang_Module::loader_offset;
3104 int java_lang_Module::name_offset;
3105 int java_lang_Module::_module_entry_offset = -1;
3106 
3107 Handle java_lang_Module::create(Handle loader, Handle module_name, TRAPS) {
3108   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3109   return JavaCalls::construct_new_instance(SystemDictionary::Module_klass(),
3110                           vmSymbols::java_lang_module_init_signature(),
3111                           loader, module_name, CHECK_NH);
3112 }
3113 
3114 #define MODULE_FIELDS_DO(macro) \
3115   macro(loader_offset,  k, vmSymbols::loader_name(),  classloader_signature, false); \
3116   macro(name_offset,    k, vmSymbols::name_name(),    string_signature,      false)
3117 
3118 void java_lang_Module::compute_offsets() {
3119   InstanceKlass* k = SystemDictionary::Module_klass();
3120   MODULE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3121   MODULE_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3122 }
3123 
3124 #if INCLUDE_CDS
3125 void java_lang_Module::serialize_offsets(SerializeClosure* f) {
3126   MODULE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3127   MODULE_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3128 }
3129 #endif
3130 
3131 oop java_lang_Module::loader(oop module) {
3132   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3133   return module->obj_field(loader_offset);
3134 }
3135 
3136 void java_lang_Module::set_loader(oop module, oop value) {
3137   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3138   module->obj_field_put(loader_offset, value);
3139 }
3140 
3141 oop java_lang_Module::name(oop module) {
3142   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3143   return module->obj_field(name_offset);
3144 }
3145 
3146 void java_lang_Module::set_name(oop module, oop value) {
3147   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3148   module->obj_field_put(name_offset, value);
3149 }
3150 
3151 ModuleEntry* java_lang_Module::module_entry(oop module) {
3152   assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
3153   assert(module != NULL, "module can't be null");
3154   assert(oopDesc::is_oop(module), "module must be oop");
3155 
3156   ModuleEntry* module_entry = (ModuleEntry*)module->address_field(_module_entry_offset);
3157   if (module_entry == NULL) {
3158     // If the inject field containing the ModuleEntry* is null then return the
3159     // class loader's unnamed module.
3160     oop loader = java_lang_Module::loader(module);
3161     Handle h_loader = Handle(Thread::current(), loader);
3162     ClassLoaderData* loader_cld = SystemDictionary::register_loader(h_loader);
3163     return loader_cld->unnamed_module();
3164   }
3165   return module_entry;
3166 }
3167 
3168 void java_lang_Module::set_module_entry(oop module, ModuleEntry* module_entry) {
3169   assert(_module_entry_offset != -1, "Uninitialized module_entry_offset");
3170   assert(module != NULL, "module can't be null");
3171   assert(oopDesc::is_oop(module), "module must be oop");
3172   module->address_field_put(_module_entry_offset, (address)module_entry);
3173 }
3174 
3175 Handle reflect_ConstantPool::create(TRAPS) {
3176   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3177   InstanceKlass* k = SystemDictionary::reflect_ConstantPool_klass();
3178   // Ensure it is initialized
3179   k->initialize(CHECK_NH);
3180   return k->allocate_instance_handle(THREAD);
3181 }
3182 
3183 
3184 void reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
3185   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3186   oop mirror = value->pool_holder()->java_mirror();
3187   // Save the mirror to get back the constant pool.
3188   reflect->obj_field_put(_oop_offset, mirror);
3189 }
3190 
3191 ConstantPool* reflect_ConstantPool::get_cp(oop reflect) {
3192   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
3193 
3194   oop mirror = reflect->obj_field(_oop_offset);
3195   Klass* k = java_lang_Class::as_Klass(mirror);
3196   assert(k->is_instance_klass(), "Must be");
3197 
3198   // Get the constant pool back from the klass.  Since class redefinition
3199   // merges the new constant pool into the old, this is essentially the
3200   // same constant pool as the original.  If constant pool merging is
3201   // no longer done in the future, this will have to change to save
3202   // the original.
3203   return InstanceKlass::cast(k)->constants();
3204 }
3205 
3206 #define UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(macro) \
3207   macro(_base_offset, k, "base", object_signature, false)
3208 
3209 void reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
3210   InstanceKlass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
3211   UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3212 }
3213 
3214 #if INCLUDE_CDS
3215 void reflect_UnsafeStaticFieldAccessorImpl::serialize_offsets(SerializeClosure* f) {
3216   UNSAFESTATICFIELDACCESSORIMPL_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3217 }
3218 #endif
3219 
3220 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
3221   Klass* k = SystemDictionary::box_klass(type);
3222   if (k == NULL)  return NULL;
3223   InstanceKlass* ik = InstanceKlass::cast(k);
3224   if (!ik->is_initialized())  ik->initialize(CHECK_0);
3225   return ik->allocate_instance(THREAD);
3226 }
3227 
3228 
3229 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
3230   oop box = initialize_and_allocate(type, CHECK_0);
3231   if (box == NULL)  return NULL;
3232   switch (type) {
3233     case T_BOOLEAN:
3234       box->bool_field_put(value_offset, value->z);
3235       break;
3236     case T_CHAR:
3237       box->char_field_put(value_offset, value->c);
3238       break;
3239     case T_FLOAT:
3240       box->float_field_put(value_offset, value->f);
3241       break;
3242     case T_DOUBLE:
3243       box->double_field_put(long_value_offset, value->d);
3244       break;
3245     case T_BYTE:
3246       box->byte_field_put(value_offset, value->b);
3247       break;
3248     case T_SHORT:
3249       box->short_field_put(value_offset, value->s);
3250       break;
3251     case T_INT:
3252       box->int_field_put(value_offset, value->i);
3253       break;
3254     case T_LONG:
3255       box->long_field_put(long_value_offset, value->j);
3256       break;
3257     default:
3258       return NULL;
3259   }
3260   return box;
3261 }
3262 
3263 
3264 BasicType java_lang_boxing_object::basic_type(oop box) {
3265   if (box == NULL)  return T_ILLEGAL;
3266   BasicType type = SystemDictionary::box_klass_type(box->klass());
3267   if (type == T_OBJECT)         // 'unknown' value returned by SD::bkt
3268     return T_ILLEGAL;
3269   return type;
3270 }
3271 
3272 
3273 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
3274   BasicType type = SystemDictionary::box_klass_type(box->klass());
3275   switch (type) {
3276   case T_BOOLEAN:
3277     value->z = box->bool_field(value_offset);
3278     break;
3279   case T_CHAR:
3280     value->c = box->char_field(value_offset);
3281     break;
3282   case T_FLOAT:
3283     value->f = box->float_field(value_offset);
3284     break;
3285   case T_DOUBLE:
3286     value->d = box->double_field(long_value_offset);
3287     break;
3288   case T_BYTE:
3289     value->b = box->byte_field(value_offset);
3290     break;
3291   case T_SHORT:
3292     value->s = box->short_field(value_offset);
3293     break;
3294   case T_INT:
3295     value->i = box->int_field(value_offset);
3296     break;
3297   case T_LONG:
3298     value->j = box->long_field(long_value_offset);
3299     break;
3300   default:
3301     return T_ILLEGAL;
3302   } // end switch
3303   return type;
3304 }
3305 
3306 
3307 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
3308   BasicType type = SystemDictionary::box_klass_type(box->klass());
3309   switch (type) {
3310   case T_BOOLEAN:
3311     box->bool_field_put(value_offset, value->z);
3312     break;
3313   case T_CHAR:
3314     box->char_field_put(value_offset, value->c);
3315     break;
3316   case T_FLOAT:
3317     box->float_field_put(value_offset, value->f);
3318     break;
3319   case T_DOUBLE:
3320     box->double_field_put(long_value_offset, value->d);
3321     break;
3322   case T_BYTE:
3323     box->byte_field_put(value_offset, value->b);
3324     break;
3325   case T_SHORT:
3326     box->short_field_put(value_offset, value->s);
3327     break;
3328   case T_INT:
3329     box->int_field_put(value_offset, value->i);
3330     break;
3331   case T_LONG:
3332     box->long_field_put(long_value_offset, value->j);
3333     break;
3334   default:
3335     return T_ILLEGAL;
3336   } // end switch
3337   return type;
3338 }
3339 
3340 
3341 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
3342   switch (type) {
3343   case T_BOOLEAN:   st->print("%s", value->z ? "true" : "false");   break;
3344   case T_CHAR:      st->print("%d", value->c);                      break;
3345   case T_BYTE:      st->print("%d", value->b);                      break;
3346   case T_SHORT:     st->print("%d", value->s);                      break;
3347   case T_INT:       st->print("%d", value->i);                      break;
3348   case T_LONG:      st->print(JLONG_FORMAT, value->j);              break;
3349   case T_FLOAT:     st->print("%f", value->f);                      break;
3350   case T_DOUBLE:    st->print("%lf", value->d);                     break;
3351   default:          st->print("type %d?", type);                    break;
3352   }
3353 }
3354 
3355 // Support for java_lang_ref_Reference
3356 
3357 bool java_lang_ref_Reference::is_referent_field(oop obj, ptrdiff_t offset) {
3358   assert(obj != NULL, "sanity");
3359   if (offset != java_lang_ref_Reference::referent_offset) {
3360     return false;
3361   }
3362 
3363   Klass* k = obj->klass();
3364   if (!k->is_instance_klass()) {
3365     return false;
3366   }
3367 
3368   InstanceKlass* ik = InstanceKlass::cast(obj->klass());
3369   bool is_reference = ik->reference_type() != REF_NONE;
3370   assert(!is_reference || ik->is_subclass_of(SystemDictionary::Reference_klass()), "sanity");
3371   return is_reference;
3372 }
3373 
3374 // Support for java_lang_ref_SoftReference
3375 //
3376 
3377 #define SOFTREFERENCE_FIELDS_DO(macro) \
3378   macro(timestamp_offset,    k, "timestamp", long_signature, false); \
3379   macro(static_clock_offset, k, "clock",     long_signature, true)
3380 
3381 void java_lang_ref_SoftReference::compute_offsets() {
3382   InstanceKlass* k = SystemDictionary::SoftReference_klass();
3383   SOFTREFERENCE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3384 }
3385 
3386 #if INCLUDE_CDS
3387 void java_lang_ref_SoftReference::serialize_offsets(SerializeClosure* f) {
3388   SOFTREFERENCE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3389 }
3390 #endif
3391 
3392 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
3393   return ref->long_field(timestamp_offset);
3394 }
3395 
3396 jlong java_lang_ref_SoftReference::clock() {
3397   InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3398   oop base = ik->static_field_base_raw();
3399   return base->long_field(static_clock_offset);
3400 }
3401 
3402 void java_lang_ref_SoftReference::set_clock(jlong value) {
3403   InstanceKlass* ik = SystemDictionary::SoftReference_klass();
3404   oop base = ik->static_field_base_raw();
3405   base->long_field_put(static_clock_offset, value);
3406 }
3407 
3408 // Support for java_lang_invoke_DirectMethodHandle
3409 
3410 int java_lang_invoke_DirectMethodHandle::_member_offset;
3411 
3412 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
3413   oop member_name = NULL;
3414   assert(oopDesc::is_oop(dmh) && java_lang_invoke_DirectMethodHandle::is_instance(dmh),
3415          "a DirectMethodHandle oop is expected");
3416   return dmh->obj_field(member_offset_in_bytes());
3417 }
3418 
3419 #define DIRECTMETHODHANDLE_FIELDS_DO(macro) \
3420   macro(_member_offset, k, "member", java_lang_invoke_MemberName_signature, false)
3421 
3422 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
3423   InstanceKlass* k = SystemDictionary::DirectMethodHandle_klass();
3424   DIRECTMETHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3425 }
3426 
3427 #if INCLUDE_CDS
3428 void java_lang_invoke_DirectMethodHandle::serialize_offsets(SerializeClosure* f) {
3429   DIRECTMETHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3430 }
3431 #endif
3432 
3433 // Support for java_lang_invoke_MethodHandle
3434 
3435 int java_lang_invoke_MethodHandle::_type_offset;
3436 int java_lang_invoke_MethodHandle::_form_offset;
3437 
3438 int java_lang_invoke_MemberName::_clazz_offset;
3439 int java_lang_invoke_MemberName::_name_offset;
3440 int java_lang_invoke_MemberName::_type_offset;
3441 int java_lang_invoke_MemberName::_flags_offset;
3442 int java_lang_invoke_MemberName::_method_offset;
3443 int java_lang_invoke_MemberName::_vmindex_offset;
3444 
3445 int java_lang_invoke_ResolvedMethodName::_vmtarget_offset;
3446 int java_lang_invoke_ResolvedMethodName::_vmholder_offset;
3447 
3448 int java_lang_invoke_LambdaForm::_vmentry_offset;
3449 
3450 #define METHODHANDLE_FIELDS_DO(macro) \
3451   macro(_type_offset, k, vmSymbols::type_name(), java_lang_invoke_MethodType_signature, false); \
3452   macro(_form_offset, k, "form",                 java_lang_invoke_LambdaForm_signature, false)
3453 
3454 void java_lang_invoke_MethodHandle::compute_offsets() {
3455   InstanceKlass* k = SystemDictionary::MethodHandle_klass();
3456   METHODHANDLE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3457 }
3458 
3459 #if INCLUDE_CDS
3460 void java_lang_invoke_MethodHandle::serialize_offsets(SerializeClosure* f) {
3461   METHODHANDLE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3462 }
3463 #endif
3464 
3465 #define MEMBERNAME_FIELDS_DO(macro) \
3466   macro(_clazz_offset,   k, vmSymbols::clazz_name(),   class_signature,  false); \
3467   macro(_name_offset,    k, vmSymbols::name_name(),    string_signature, false); \
3468   macro(_type_offset,    k, vmSymbols::type_name(),    object_signature, false); \
3469   macro(_flags_offset,   k, vmSymbols::flags_name(),   int_signature,    false); \
3470   macro(_method_offset,  k, vmSymbols::method_name(),  java_lang_invoke_ResolvedMethodName_signature, false)
3471 
3472 void java_lang_invoke_MemberName::compute_offsets() {
3473   InstanceKlass* k = SystemDictionary::MemberName_klass();
3474   MEMBERNAME_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3475   MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3476 }
3477 
3478 #if INCLUDE_CDS
3479 void java_lang_invoke_MemberName::serialize_offsets(SerializeClosure* f) {
3480   MEMBERNAME_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3481   MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3482 }
3483 #endif
3484 
3485 void java_lang_invoke_ResolvedMethodName::compute_offsets() {
3486   InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass();
3487   assert(k != NULL, "jdk mismatch");
3488   RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3489 }
3490 
3491 #if INCLUDE_CDS
3492 void java_lang_invoke_ResolvedMethodName::serialize_offsets(SerializeClosure* f) {
3493   RESOLVEDMETHOD_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3494 }
3495 #endif
3496 
3497 #define LAMBDAFORM_FIELDS_DO(macro) \
3498   macro(_vmentry_offset, k, "vmentry", java_lang_invoke_MemberName_signature, false)
3499 
3500 void java_lang_invoke_LambdaForm::compute_offsets() {
3501   InstanceKlass* k = SystemDictionary::LambdaForm_klass();
3502   assert (k != NULL, "jdk mismatch");
3503   LAMBDAFORM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3504 }
3505 
3506 #if INCLUDE_CDS
3507 void java_lang_invoke_LambdaForm::serialize_offsets(SerializeClosure* f) {
3508   LAMBDAFORM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3509 }
3510 #endif
3511 
3512 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
3513   return obj != NULL && is_subclass(obj->klass());
3514 }
3515 
3516 
3517 oop java_lang_invoke_MethodHandle::type(oop mh) {
3518   return mh->obj_field(_type_offset);
3519 }
3520 
3521 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
3522   mh->obj_field_put(_type_offset, mtype);
3523 }
3524 
3525 oop java_lang_invoke_MethodHandle::form(oop mh) {
3526   assert(_form_offset != 0, "");
3527   return mh->obj_field(_form_offset);
3528 }
3529 
3530 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
3531   assert(_form_offset != 0, "");
3532   mh->obj_field_put(_form_offset, lform);
3533 }
3534 
3535 /// MemberName accessors
3536 
3537 oop java_lang_invoke_MemberName::clazz(oop mname) {
3538   assert(is_instance(mname), "wrong type");
3539   return mname->obj_field(_clazz_offset);
3540 }
3541 
3542 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
3543   assert(is_instance(mname), "wrong type");
3544   mname->obj_field_put(_clazz_offset, clazz);
3545 }
3546 
3547 oop java_lang_invoke_MemberName::name(oop mname) {
3548   assert(is_instance(mname), "wrong type");
3549   return mname->obj_field(_name_offset);
3550 }
3551 
3552 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
3553   assert(is_instance(mname), "wrong type");
3554   mname->obj_field_put(_name_offset, name);
3555 }
3556 
3557 oop java_lang_invoke_MemberName::type(oop mname) {
3558   assert(is_instance(mname), "wrong type");
3559   return mname->obj_field(_type_offset);
3560 }
3561 
3562 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
3563   assert(is_instance(mname), "wrong type");
3564   mname->obj_field_put(_type_offset, type);
3565 }
3566 
3567 int java_lang_invoke_MemberName::flags(oop mname) {
3568   assert(is_instance(mname), "wrong type");
3569   return mname->int_field(_flags_offset);
3570 }
3571 
3572 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
3573   assert(is_instance(mname), "wrong type");
3574   mname->int_field_put(_flags_offset, flags);
3575 }
3576 
3577 
3578 // Return vmtarget from ResolvedMethodName method field through indirection
3579 Method* java_lang_invoke_MemberName::vmtarget(oop mname) {
3580   assert(is_instance(mname), "wrong type");
3581   oop method = mname->obj_field(_method_offset);
3582   return method == NULL ? NULL : java_lang_invoke_ResolvedMethodName::vmtarget(method);
3583 }
3584 
3585 bool java_lang_invoke_MemberName::is_method(oop mname) {
3586   assert(is_instance(mname), "must be MemberName");
3587   return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
3588 }
3589 
3590 void java_lang_invoke_MemberName::set_method(oop mname, oop resolved_method) {
3591   assert(is_instance(mname), "wrong type");
3592   mname->obj_field_put(_method_offset, resolved_method);
3593 }
3594 
3595 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
3596   assert(is_instance(mname), "wrong type");
3597   return (intptr_t) mname->address_field(_vmindex_offset);
3598 }
3599 
3600 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
3601   assert(is_instance(mname), "wrong type");
3602   mname->address_field_put(_vmindex_offset, (address) index);
3603 }
3604 
3605 
3606 Method* java_lang_invoke_ResolvedMethodName::vmtarget(oop resolved_method) {
3607   assert(is_instance(resolved_method), "wrong type");
3608   Method* m = (Method*)resolved_method->address_field(_vmtarget_offset);
3609   assert(m->is_method(), "must be");
3610   return m;
3611 }
3612 
3613 // Used by redefinition to change Method* to new Method* with same hash (name, signature)
3614 void java_lang_invoke_ResolvedMethodName::set_vmtarget(oop resolved_method, Method* m) {
3615   assert(is_instance(resolved_method), "wrong type");
3616   resolved_method->address_field_put(_vmtarget_offset, (address)m);
3617 }
3618 
3619 void java_lang_invoke_ResolvedMethodName::set_vmholder(oop resolved_method, oop holder) {
3620   assert(is_instance(resolved_method), "wrong type");
3621   resolved_method->obj_field_put(_vmholder_offset, holder);
3622 }
3623 
3624 oop java_lang_invoke_ResolvedMethodName::find_resolved_method(const methodHandle& m, TRAPS) {
3625   const Method* method = m();
3626 
3627   // lookup ResolvedMethod oop in the table, or create a new one and intern it
3628   oop resolved_method = ResolvedMethodTable::find_method(method);
3629   if (resolved_method != NULL) {
3630     return resolved_method;
3631   }
3632 
3633   InstanceKlass* k = SystemDictionary::ResolvedMethodName_klass();
3634   if (!k->is_initialized()) {
3635     k->initialize(CHECK_NULL);
3636   }
3637 
3638   oop new_resolved_method = k->allocate_instance(CHECK_NULL);
3639 
3640   NoSafepointVerifier nsv;
3641 
3642   if (method->is_old()) {
3643     method = (method->is_deleted()) ? Universe::throw_no_such_method_error() :
3644                                       method->get_new_method();
3645   }
3646 
3647   InstanceKlass* holder = method->method_holder();
3648 
3649   set_vmtarget(new_resolved_method, const_cast<Method*>(method));
3650   // Add a reference to the loader (actually mirror because unsafe anonymous classes will not have
3651   // distinct loaders) to ensure the metadata is kept alive.
3652   // This mirror may be different than the one in clazz field.
3653   set_vmholder(new_resolved_method, holder->java_mirror());
3654 
3655   // Set flag in class to indicate this InstanceKlass has entries in the table
3656   // to avoid walking table during redefinition if none of the redefined classes
3657   // have any membernames in the table.
3658   holder->set_has_resolved_methods();
3659 
3660   return ResolvedMethodTable::add_method(method, Handle(THREAD, new_resolved_method));
3661 }
3662 
3663 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
3664   assert(is_instance(lform), "wrong type");
3665   return lform->obj_field(_vmentry_offset);
3666 }
3667 
3668 
3669 // Support for java_lang_invoke_MethodType
3670 
3671 int java_lang_invoke_MethodType::_rtype_offset;
3672 int java_lang_invoke_MethodType::_ptypes_offset;
3673 
3674 #define METHODTYPE_FIELDS_DO(macro) \
3675   macro(_rtype_offset,  k, "rtype",  class_signature,       false); \
3676   macro(_ptypes_offset, k, "ptypes", class_array_signature, false)
3677 
3678 void java_lang_invoke_MethodType::compute_offsets() {
3679   InstanceKlass* k = SystemDictionary::MethodType_klass();
3680   METHODTYPE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3681 }
3682 
3683 #if INCLUDE_CDS
3684 void java_lang_invoke_MethodType::serialize_offsets(SerializeClosure* f) {
3685   METHODTYPE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3686 }
3687 #endif
3688 
3689 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
3690   st->print("(");
3691   objArrayOop pts = ptypes(mt);
3692   for (int i = 0, limit = pts->length(); i < limit; i++) {
3693     java_lang_Class::print_signature(pts->obj_at(i), st);
3694   }
3695   st->print(")");
3696   java_lang_Class::print_signature(rtype(mt), st);
3697 }
3698 
3699 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found) {
3700   ResourceMark rm;
3701   stringStream buffer(128);
3702   print_signature(mt, &buffer);
3703   const char* sigstr =       buffer.base();
3704   int         siglen = (int) buffer.size();
3705   Symbol *name;
3706   if (!intern_if_not_found) {
3707     name = SymbolTable::probe(sigstr, siglen);
3708   } else {
3709     name = SymbolTable::new_symbol(sigstr, siglen);
3710   }
3711   return name;
3712 }
3713 
3714 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
3715   if (oopDesc::equals(mt1, mt2))
3716     return true;
3717   if (!oopDesc::equals(rtype(mt1), rtype(mt2)))
3718     return false;
3719   if (ptype_count(mt1) != ptype_count(mt2))
3720     return false;
3721   for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
3722     if (!oopDesc::equals(ptype(mt1, i), ptype(mt2, i)))
3723       return false;
3724   }
3725   return true;
3726 }
3727 
3728 oop java_lang_invoke_MethodType::rtype(oop mt) {
3729   assert(is_instance(mt), "must be a MethodType");
3730   return mt->obj_field(_rtype_offset);
3731 }
3732 
3733 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
3734   assert(is_instance(mt), "must be a MethodType");
3735   return (objArrayOop) mt->obj_field(_ptypes_offset);
3736 }
3737 
3738 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
3739   return ptypes(mt)->obj_at(idx);
3740 }
3741 
3742 int java_lang_invoke_MethodType::ptype_count(oop mt) {
3743   return ptypes(mt)->length();
3744 }
3745 
3746 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
3747   objArrayOop pts = ptypes(mt);
3748   int count = pts->length();
3749   int slots = 0;
3750   for (int i = 0; i < count; i++) {
3751     BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
3752     slots += type2size[bt];
3753   }
3754   return slots;
3755 }
3756 
3757 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
3758   BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
3759   return type2size[bt];
3760 }
3761 
3762 
3763 // Support for java_lang_invoke_CallSite
3764 
3765 int java_lang_invoke_CallSite::_target_offset;
3766 int java_lang_invoke_CallSite::_context_offset;
3767 
3768 #define CALLSITE_FIELDS_DO(macro) \
3769   macro(_target_offset,  k, "target", java_lang_invoke_MethodHandle_signature, false); \
3770   macro(_context_offset, k, "context", java_lang_invoke_MethodHandleNatives_CallSiteContext_signature, false)
3771 
3772 void java_lang_invoke_CallSite::compute_offsets() {
3773   InstanceKlass* k = SystemDictionary::CallSite_klass();
3774   CALLSITE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3775 }
3776 
3777 #if INCLUDE_CDS
3778 void java_lang_invoke_CallSite::serialize_offsets(SerializeClosure* f) {
3779   CALLSITE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3780 }
3781 #endif
3782 
3783 oop java_lang_invoke_CallSite::context_no_keepalive(oop call_site) {
3784   assert(java_lang_invoke_CallSite::is_instance(call_site), "");
3785 
3786   oop dep_oop = call_site->obj_field_access<AS_NO_KEEPALIVE>(_context_offset);
3787   return dep_oop;
3788 }
3789 
3790 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext
3791 
3792 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset;
3793 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_last_cleanup_offset;
3794 
3795 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() {
3796   InstanceKlass* k = SystemDictionary::Context_klass();
3797   CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3798 }
3799 
3800 #if INCLUDE_CDS
3801 void java_lang_invoke_MethodHandleNatives_CallSiteContext::serialize_offsets(SerializeClosure* f) {
3802   CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3803 }
3804 #endif
3805 
3806 DependencyContext java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) {
3807   assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
3808   nmethodBucket* volatile* vmdeps_addr = (nmethodBucket* volatile*)call_site->field_addr(_vmdependencies_offset);
3809   volatile uint64_t* last_cleanup_addr = (volatile uint64_t*)call_site->field_addr(_last_cleanup_offset);
3810   DependencyContext dep_ctx(vmdeps_addr, last_cleanup_addr);
3811   return dep_ctx;
3812 }
3813 
3814 // Support for java_security_AccessControlContext
3815 
3816 int java_security_AccessControlContext::_context_offset = 0;
3817 int java_security_AccessControlContext::_privilegedContext_offset = 0;
3818 int java_security_AccessControlContext::_isPrivileged_offset = 0;
3819 int java_security_AccessControlContext::_isAuthorized_offset = -1;
3820 
3821 #define ACCESSCONTROLCONTEXT_FIELDS_DO(macro) \
3822   macro(_context_offset,           k, "context",      protectiondomain_signature, false); \
3823   macro(_privilegedContext_offset, k, "privilegedContext", accesscontrolcontext_signature, false); \
3824   macro(_isPrivileged_offset,      k, "isPrivileged", bool_signature, false); \
3825   macro(_isAuthorized_offset,      k, "isAuthorized", bool_signature, false)
3826 
3827 void java_security_AccessControlContext::compute_offsets() {
3828   assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
3829   InstanceKlass* k = SystemDictionary::AccessControlContext_klass();
3830   ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3831 }
3832 
3833 #if INCLUDE_CDS
3834 void java_security_AccessControlContext::serialize_offsets(SerializeClosure* f) {
3835   ACCESSCONTROLCONTEXT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3836 }
3837 #endif
3838 
3839 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
3840   assert(_isPrivileged_offset != 0, "offsets should have been initialized");
3841   // Ensure klass is initialized
3842   SystemDictionary::AccessControlContext_klass()->initialize(CHECK_0);
3843   // Allocate result
3844   oop result = SystemDictionary::AccessControlContext_klass()->allocate_instance(CHECK_0);
3845   // Fill in values
3846   result->obj_field_put(_context_offset, context());
3847   result->obj_field_put(_privilegedContext_offset, privileged_context());
3848   result->bool_field_put(_isPrivileged_offset, isPrivileged);
3849   // whitelist AccessControlContexts created by the JVM if present
3850   if (_isAuthorized_offset != -1) {
3851     result->bool_field_put(_isAuthorized_offset, true);
3852   }
3853   return result;
3854 }
3855 
3856 
3857 // Support for java_lang_ClassLoader
3858 
3859 bool java_lang_ClassLoader::offsets_computed = false;
3860 int  java_lang_ClassLoader::_loader_data_offset = -1;
3861 int  java_lang_ClassLoader::parallelCapable_offset = -1;
3862 int  java_lang_ClassLoader::name_offset = -1;
3863 int  java_lang_ClassLoader::nameAndId_offset = -1;
3864 int  java_lang_ClassLoader::unnamedModule_offset = -1;
3865 
3866 ClassLoaderData* java_lang_ClassLoader::loader_data_acquire(oop loader) {
3867   assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
3868   return HeapAccess<MO_ACQUIRE>::load_at(loader, _loader_data_offset);
3869 }
3870 
3871 ClassLoaderData* java_lang_ClassLoader::loader_data_raw(oop loader) {
3872   assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
3873   return RawAccess<>::load_at(loader, _loader_data_offset);
3874 }
3875 
3876 void java_lang_ClassLoader::release_set_loader_data(oop loader, ClassLoaderData* new_data) {
3877   assert(loader != NULL && oopDesc::is_oop(loader), "loader must be oop");
3878   HeapAccess<MO_RELEASE>::store_at(loader, _loader_data_offset, new_data);
3879 }
3880 
3881 #define CLASSLOADER_FIELDS_DO(macro) \
3882   macro(parallelCapable_offset, k1, "parallelLockMap",      concurrenthashmap_signature, false); \
3883   macro(name_offset,            k1, vmSymbols::name_name(), string_signature, false); \
3884   macro(nameAndId_offset,       k1, "nameAndId",            string_signature, false); \
3885   macro(unnamedModule_offset,   k1, "unnamedModule",        module_signature, false); \
3886   macro(parent_offset,          k1, "parent",               classloader_signature, false)
3887 
3888 void java_lang_ClassLoader::compute_offsets() {
3889   assert(!offsets_computed, "offsets should be initialized only once");
3890   offsets_computed = true;
3891 
3892   InstanceKlass* k1 = SystemDictionary::ClassLoader_klass();
3893   CLASSLOADER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
3894 
3895   CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3896 }
3897 
3898 #if INCLUDE_CDS
3899 void java_lang_ClassLoader::serialize_offsets(SerializeClosure* f) {
3900   CLASSLOADER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
3901   CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_SERIALIZE_OFFSET);
3902 }
3903 #endif
3904 
3905 oop java_lang_ClassLoader::parent(oop loader) {
3906   assert(is_instance(loader), "loader must be oop");
3907   return loader->obj_field(parent_offset);
3908 }
3909 
3910 // Returns the name field of this class loader.  If the name field has not
3911 // been set, null will be returned.
3912 oop java_lang_ClassLoader::name(oop loader) {
3913   assert(is_instance(loader), "loader must be oop");
3914   return loader->obj_field(name_offset);
3915 }
3916 
3917 // Returns the nameAndId field of this class loader. The format is
3918 // as follows:
3919 //   If the defining loader has a name explicitly set then '<loader-name>' @<id>
3920 //   If the defining loader has no name then <qualified-class-name> @<id>
3921 //   If built-in loader, then omit '@<id>' as there is only one instance.
3922 // Use ClassLoader::loader_name_id() to obtain this String as a char*.
3923 oop java_lang_ClassLoader::nameAndId(oop loader) {
3924   assert(is_instance(loader), "loader must be oop");
3925   return loader->obj_field(nameAndId_offset);
3926 }
3927 
3928 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
3929   assert(is_instance(loader), "loader must be oop");
3930   assert(cl == NULL || is_instance(cl), "cl argument must be oop");
3931   oop acl = loader;
3932   debug_only(jint loop_count = 0);
3933   // This loop taken verbatim from ClassLoader.java:
3934   do {
3935     acl = parent(acl);
3936     if (oopDesc::equals(cl, acl)) {
3937       return true;
3938     }
3939     assert(++loop_count > 0, "loop_count overflow");
3940   } while (acl != NULL);
3941   return false;
3942 }
3943 
3944 bool java_lang_ClassLoader::is_instance(oop obj) {
3945   return obj != NULL && is_subclass(obj->klass());
3946 }
3947 
3948 
3949 // For class loader classes, parallelCapable defined
3950 // based on non-null field
3951 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
3952 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
3953   if (parallelCapable_offset == -1) {
3954      // Default for backward compatibility is false
3955      return false;
3956   }
3957   return (class_loader->obj_field(parallelCapable_offset) != NULL);
3958 }
3959 
3960 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
3961   // Fix for 4474172; see evaluation for more details
3962   loader = non_reflection_class_loader(loader);
3963 
3964   oop cl = SystemDictionary::java_system_loader();
3965   while(cl != NULL) {
3966     if (oopDesc::equals(cl, loader)) return true;
3967     cl = parent(cl);
3968   }
3969   return false;
3970 }
3971 
3972 // Return true if this is one of the class loaders associated with
3973 // the generated bytecodes for reflection.
3974 bool java_lang_ClassLoader::is_reflection_class_loader(oop loader) {
3975   if (loader != NULL) {
3976     Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
3977     // This might be null in non-1.4 JDKs
3978     return (delegating_cl_class != NULL && loader->is_a(delegating_cl_class));
3979   }
3980   return false;
3981 }
3982 
3983 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
3984   // See whether this is one of the class loaders associated with
3985   // the generated bytecodes for reflection, and if so, "magically"
3986   // delegate to its parent to prevent class loading from occurring
3987   // in places where applications using reflection didn't expect it.
3988   if (is_reflection_class_loader(loader)) {
3989     return parent(loader);
3990   }
3991   return loader;
3992 }
3993 
3994 oop java_lang_ClassLoader::unnamedModule(oop loader) {
3995   assert(is_instance(loader), "loader must be oop");
3996   return loader->obj_field(unnamedModule_offset);
3997 }
3998 
3999 // Support for java_lang_System
4000 //
4001 #define SYSTEM_FIELDS_DO(macro) \
4002   macro(static_in_offset,  k, "in",  input_stream_signature, true); \
4003   macro(static_out_offset, k, "out", print_stream_signature, true); \
4004   macro(static_err_offset, k, "err", print_stream_signature, true); \
4005   macro(static_security_offset, k, "security", security_manager_signature, true)
4006 
4007 void java_lang_System::compute_offsets() {
4008   InstanceKlass* k = SystemDictionary::System_klass();
4009   SYSTEM_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4010 }
4011 
4012 #if INCLUDE_CDS
4013 void java_lang_System::serialize_offsets(SerializeClosure* f) {
4014    SYSTEM_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4015 }
4016 #endif
4017 
4018 int java_lang_System::in_offset_in_bytes() { return static_in_offset; }
4019 int java_lang_System::out_offset_in_bytes() { return static_out_offset; }
4020 int java_lang_System::err_offset_in_bytes() { return static_err_offset; }
4021 
4022 // Support for jdk_internal_misc_UnsafeConstants
4023 //
4024 class UnsafeConstantsFixup : public FieldClosure {
4025 private:
4026   int _address_size;
4027   int _page_size;
4028   bool _big_endian;
4029   bool _use_unaligned_access;
4030   int _data_cache_line_flush_size;
4031 public:
4032   UnsafeConstantsFixup() {
4033     // round up values for all static final fields
4034     _address_size = sizeof(void*);
4035     _page_size = os::vm_page_size();
4036     _big_endian = LITTLE_ENDIAN_ONLY(false) BIG_ENDIAN_ONLY(true);
4037     _use_unaligned_access = UseUnalignedAccesses;
4038     _data_cache_line_flush_size = (int)VM_Version::data_cache_line_flush_size();
4039   }
4040 
4041   void do_field(fieldDescriptor* fd) {
4042     oop mirror = fd->field_holder()->java_mirror();
4043     assert(mirror != NULL, "UnsafeConstants must have mirror already");
4044     assert(fd->field_holder() == SystemDictionary::UnsafeConstants_klass(), "Should be UnsafeConstants");
4045     assert(fd->is_final(), "fields of UnsafeConstants must be final");
4046     assert(fd->is_static(), "fields of UnsafeConstants must be static");
4047     if (fd->name() == vmSymbols::address_size_name()) {
4048       mirror->int_field_put(fd->offset(), _address_size);
4049     } else if (fd->name() == vmSymbols::page_size_name()) {
4050       mirror->int_field_put(fd->offset(), _page_size);
4051     } else if (fd->name() == vmSymbols::big_endian_name()) {
4052       mirror->bool_field_put(fd->offset(), _big_endian);
4053     } else if (fd->name() == vmSymbols::use_unaligned_access_name()) {
4054       mirror->bool_field_put(fd->offset(), _use_unaligned_access);
4055     } else if (fd->name() == vmSymbols::data_cache_line_flush_size_name()) {
4056       mirror->int_field_put(fd->offset(), _data_cache_line_flush_size);
4057     } else {
4058       assert(false, "unexpected UnsafeConstants field");
4059     }
4060   }
4061 };
4062 
4063 void jdk_internal_misc_UnsafeConstants::set_unsafe_constants() {
4064   UnsafeConstantsFixup fixup;
4065   SystemDictionary::UnsafeConstants_klass()->do_local_static_fields(&fixup);
4066 }
4067 
4068 int java_lang_Class::_klass_offset;
4069 int java_lang_Class::_array_klass_offset;
4070 int java_lang_Class::_oop_size_offset;
4071 int java_lang_Class::_static_oop_field_count_offset;
4072 int java_lang_Class::_class_loader_offset;
4073 int java_lang_Class::_module_offset;
4074 int java_lang_Class::_protection_domain_offset;
4075 int java_lang_Class::_component_mirror_offset;
4076 int java_lang_Class::_init_lock_offset;
4077 int java_lang_Class::_signers_offset;
4078 int java_lang_Class::_name_offset;
4079 int java_lang_Class::_source_file_offset;
4080 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
4081 GrowableArray<Klass*>* java_lang_Class::_fixup_module_field_list = NULL;
4082 int java_lang_Throwable::backtrace_offset;
4083 int java_lang_Throwable::detailMessage_offset;
4084 int java_lang_Throwable::stackTrace_offset;
4085 int java_lang_Throwable::depth_offset;
4086 int java_lang_Throwable::static_unassigned_stacktrace_offset;
4087 int java_lang_reflect_AccessibleObject::override_offset;
4088 int java_lang_reflect_Method::clazz_offset;
4089 int java_lang_reflect_Method::name_offset;
4090 int java_lang_reflect_Method::returnType_offset;
4091 int java_lang_reflect_Method::parameterTypes_offset;
4092 int java_lang_reflect_Method::exceptionTypes_offset;
4093 int java_lang_reflect_Method::slot_offset;
4094 int java_lang_reflect_Method::modifiers_offset;
4095 int java_lang_reflect_Method::signature_offset;
4096 int java_lang_reflect_Method::annotations_offset;
4097 int java_lang_reflect_Method::parameter_annotations_offset;
4098 int java_lang_reflect_Method::annotation_default_offset;
4099 int java_lang_reflect_Constructor::clazz_offset;
4100 int java_lang_reflect_Constructor::parameterTypes_offset;
4101 int java_lang_reflect_Constructor::exceptionTypes_offset;
4102 int java_lang_reflect_Constructor::slot_offset;
4103 int java_lang_reflect_Constructor::modifiers_offset;
4104 int java_lang_reflect_Constructor::signature_offset;
4105 int java_lang_reflect_Constructor::annotations_offset;
4106 int java_lang_reflect_Constructor::parameter_annotations_offset;
4107 int java_lang_reflect_Field::clazz_offset;
4108 int java_lang_reflect_Field::name_offset;
4109 int java_lang_reflect_Field::type_offset;
4110 int java_lang_reflect_Field::slot_offset;
4111 int java_lang_reflect_Field::modifiers_offset;
4112 int java_lang_reflect_Field::signature_offset;
4113 int java_lang_reflect_Field::annotations_offset;
4114 int java_lang_reflect_Parameter::name_offset;
4115 int java_lang_reflect_Parameter::modifiers_offset;
4116 int java_lang_reflect_Parameter::index_offset;
4117 int java_lang_reflect_Parameter::executable_offset;
4118 int java_lang_boxing_object::value_offset;
4119 int java_lang_boxing_object::long_value_offset;
4120 int java_lang_ref_Reference::referent_offset;
4121 int java_lang_ref_Reference::queue_offset;
4122 int java_lang_ref_Reference::next_offset;
4123 int java_lang_ref_Reference::discovered_offset;
4124 int java_lang_ref_SoftReference::timestamp_offset;
4125 int java_lang_ref_SoftReference::static_clock_offset;
4126 int java_lang_ClassLoader::parent_offset;
4127 int java_lang_System::static_in_offset;
4128 int java_lang_System::static_out_offset;
4129 int java_lang_System::static_err_offset;
4130 int java_lang_System::static_security_offset;
4131 int java_lang_StackTraceElement::methodName_offset;
4132 int java_lang_StackTraceElement::fileName_offset;
4133 int java_lang_StackTraceElement::lineNumber_offset;
4134 int java_lang_StackTraceElement::moduleName_offset;
4135 int java_lang_StackTraceElement::moduleVersion_offset;
4136 int java_lang_StackTraceElement::classLoaderName_offset;
4137 int java_lang_StackTraceElement::declaringClass_offset;
4138 int java_lang_StackTraceElement::declaringClassObject_offset;
4139 int java_lang_StackFrameInfo::_memberName_offset;
4140 int java_lang_StackFrameInfo::_bci_offset;
4141 int java_lang_StackFrameInfo::_version_offset;
4142 int java_lang_LiveStackFrameInfo::_monitors_offset;
4143 int java_lang_LiveStackFrameInfo::_locals_offset;
4144 int java_lang_LiveStackFrameInfo::_operands_offset;
4145 int java_lang_LiveStackFrameInfo::_mode_offset;
4146 int java_lang_AssertionStatusDirectives::classes_offset;
4147 int java_lang_AssertionStatusDirectives::classEnabled_offset;
4148 int java_lang_AssertionStatusDirectives::packages_offset;
4149 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
4150 int java_lang_AssertionStatusDirectives::deflt_offset;
4151 int java_nio_Buffer::_limit_offset;
4152 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset;
4153 int reflect_ConstantPool::_oop_offset;
4154 int reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
4155 int java_lang_Integer_IntegerCache::_static_cache_offset;
4156 int java_lang_Long_LongCache::_static_cache_offset;
4157 int java_lang_Character_CharacterCache::_static_cache_offset;
4158 int java_lang_Short_ShortCache::_static_cache_offset;
4159 int java_lang_Byte_ByteCache::_static_cache_offset;
4160 int java_lang_Boolean::_static_TRUE_offset;
4161 int java_lang_Boolean::_static_FALSE_offset;
4162 
4163 
4164 
4165 #define STACKTRACEELEMENT_FIELDS_DO(macro) \
4166   macro(declaringClassObject_offset,  k, "declaringClassObject", class_signature, false); \
4167   macro(classLoaderName_offset, k, "classLoaderName", string_signature, false); \
4168   macro(moduleName_offset,      k, "moduleName",      string_signature, false); \
4169   macro(moduleVersion_offset,   k, "moduleVersion",   string_signature, false); \
4170   macro(declaringClass_offset,  k, "declaringClass",  string_signature, false); \
4171   macro(methodName_offset,      k, "methodName",      string_signature, false); \
4172   macro(fileName_offset,        k, "fileName",        string_signature, false); \
4173   macro(lineNumber_offset,      k, "lineNumber",      int_signature,    false)
4174 
4175 // Support for java_lang_StackTraceElement
4176 void java_lang_StackTraceElement::compute_offsets() {
4177   InstanceKlass* k = SystemDictionary::StackTraceElement_klass();
4178   STACKTRACEELEMENT_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4179 }
4180 
4181 #if INCLUDE_CDS
4182 void java_lang_StackTraceElement::serialize_offsets(SerializeClosure* f) {
4183   STACKTRACEELEMENT_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4184 }
4185 #endif
4186 
4187 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
4188   element->obj_field_put(fileName_offset, value);
4189 }
4190 
4191 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
4192   element->obj_field_put(declaringClass_offset, value);
4193 }
4194 
4195 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
4196   element->obj_field_put(methodName_offset, value);
4197 }
4198 
4199 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
4200   element->int_field_put(lineNumber_offset, value);
4201 }
4202 
4203 void java_lang_StackTraceElement::set_moduleName(oop element, oop value) {
4204   element->obj_field_put(moduleName_offset, value);
4205 }
4206 
4207 void java_lang_StackTraceElement::set_moduleVersion(oop element, oop value) {
4208   element->obj_field_put(moduleVersion_offset, value);
4209 }
4210 
4211 void java_lang_StackTraceElement::set_classLoaderName(oop element, oop value) {
4212   element->obj_field_put(classLoaderName_offset, value);
4213 }
4214 
4215 void java_lang_StackTraceElement::set_declaringClassObject(oop element, oop value) {
4216   element->obj_field_put(declaringClassObject_offset, value);
4217 }
4218 
4219 void java_lang_StackFrameInfo::set_version(oop element, short value) {
4220   element->short_field_put(_version_offset, value);
4221 }
4222 
4223 void java_lang_StackFrameInfo::set_bci(oop element, int value) {
4224   assert(value >= 0 && value < max_jushort, "must be a valid bci value");
4225   element->int_field_put(_bci_offset, value);
4226 }
4227 
4228 void java_lang_LiveStackFrameInfo::set_monitors(oop element, oop value) {
4229   element->obj_field_put(_monitors_offset, value);
4230 }
4231 
4232 void java_lang_LiveStackFrameInfo::set_locals(oop element, oop value) {
4233   element->obj_field_put(_locals_offset, value);
4234 }
4235 
4236 void java_lang_LiveStackFrameInfo::set_operands(oop element, oop value) {
4237   element->obj_field_put(_operands_offset, value);
4238 }
4239 
4240 void java_lang_LiveStackFrameInfo::set_mode(oop element, int value) {
4241   element->int_field_put(_mode_offset, value);
4242 }
4243 
4244 // Support for java Assertions - java_lang_AssertionStatusDirectives.
4245 #define ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(macro) \
4246   macro(classes_offset,        k, "classes",        string_array_signature, false); \
4247   macro(classEnabled_offset,   k, "classEnabled",   bool_array_signature, false); \
4248   macro(packages_offset,       k, "packages",       string_array_signature, false); \
4249   macro(packageEnabled_offset, k, "packageEnabled", bool_array_signature,   false); \
4250   macro(deflt_offset,          k, "deflt",          bool_signature,         false)
4251 
4252 void java_lang_AssertionStatusDirectives::compute_offsets() {
4253   InstanceKlass* k = SystemDictionary::AssertionStatusDirectives_klass();
4254   ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4255 }
4256 
4257 #if INCLUDE_CDS
4258 void java_lang_AssertionStatusDirectives::serialize_offsets(SerializeClosure* f) {
4259   ASSERTIONSTATUSDIRECTIVES_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4260 }
4261 #endif
4262 
4263 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
4264   o->obj_field_put(classes_offset, val);
4265 }
4266 
4267 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
4268   o->obj_field_put(classEnabled_offset, val);
4269 }
4270 
4271 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
4272   o->obj_field_put(packages_offset, val);
4273 }
4274 
4275 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
4276   o->obj_field_put(packageEnabled_offset, val);
4277 }
4278 
4279 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
4280   o->bool_field_put(deflt_offset, val);
4281 }
4282 
4283 
4284 // Support for intrinsification of java.nio.Buffer.checkIndex
4285 int java_nio_Buffer::limit_offset() {
4286   return _limit_offset;
4287 }
4288 
4289 #define BUFFER_FIELDS_DO(macro) \
4290   macro(_limit_offset, k, "limit", int_signature, false)
4291 
4292 void java_nio_Buffer::compute_offsets() {
4293   InstanceKlass* k = SystemDictionary::nio_Buffer_klass();
4294   assert(k != NULL, "must be loaded in 1.4+");
4295   BUFFER_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4296 }
4297 
4298 #if INCLUDE_CDS
4299 void java_nio_Buffer::serialize_offsets(SerializeClosure* f) {
4300   BUFFER_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4301 }
4302 #endif
4303 
4304 #define AOS_FIELDS_DO(macro) \
4305   macro(_owner_offset, k, "exclusiveOwnerThread", thread_signature, false)
4306 
4307 void java_util_concurrent_locks_AbstractOwnableSynchronizer::compute_offsets() {
4308   InstanceKlass* k = SystemDictionary::java_util_concurrent_locks_AbstractOwnableSynchronizer_klass();
4309   AOS_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4310 }
4311 
4312 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
4313   assert(_owner_offset != 0, "Must be initialized");
4314   return obj->obj_field(_owner_offset);
4315 }
4316 
4317 #if INCLUDE_CDS
4318 void java_util_concurrent_locks_AbstractOwnableSynchronizer::serialize_offsets(SerializeClosure* f) {
4319   AOS_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4320 }
4321 #endif
4322 
4323 #define INTEGER_CACHE_FIELDS_DO(macro) \
4324   macro(_static_cache_offset, k, "cache", java_lang_Integer_array_signature, true)
4325 
4326 void java_lang_Integer_IntegerCache::compute_offsets(InstanceKlass *k) {
4327   guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4328   INTEGER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4329 }
4330 
4331 objArrayOop java_lang_Integer_IntegerCache::cache(InstanceKlass *ik) {
4332   oop base = ik->static_field_base_raw();
4333   return objArrayOop(base->obj_field(_static_cache_offset));
4334 }
4335 
4336 Symbol* java_lang_Integer_IntegerCache::symbol() {
4337   return vmSymbols::java_lang_Integer_IntegerCache();
4338 }
4339 
4340 #if INCLUDE_CDS
4341 void java_lang_Integer_IntegerCache::serialize_offsets(SerializeClosure* f) {
4342   INTEGER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4343 }
4344 #endif
4345 #undef INTEGER_CACHE_FIELDS_DO
4346 
4347 jint java_lang_Integer::value(oop obj) {
4348    jvalue v;
4349    java_lang_boxing_object::get_value(obj, &v);
4350    return v.i;
4351 }
4352 
4353 #define LONG_CACHE_FIELDS_DO(macro) \
4354   macro(_static_cache_offset, k, "cache", java_lang_Long_array_signature, true)
4355 
4356 void java_lang_Long_LongCache::compute_offsets(InstanceKlass *k) {
4357   guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4358   LONG_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4359 }
4360 
4361 objArrayOop java_lang_Long_LongCache::cache(InstanceKlass *ik) {
4362   oop base = ik->static_field_base_raw();
4363   return objArrayOop(base->obj_field(_static_cache_offset));
4364 }
4365 
4366 Symbol* java_lang_Long_LongCache::symbol() {
4367   return vmSymbols::java_lang_Long_LongCache();
4368 }
4369 
4370 #if INCLUDE_CDS
4371 void java_lang_Long_LongCache::serialize_offsets(SerializeClosure* f) {
4372   LONG_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4373 }
4374 #endif
4375 #undef LONG_CACHE_FIELDS_DO
4376 
4377 jlong java_lang_Long::value(oop obj) {
4378    jvalue v;
4379    java_lang_boxing_object::get_value(obj, &v);
4380    return v.j;
4381 }
4382 
4383 #define CHARACTER_CACHE_FIELDS_DO(macro) \
4384   macro(_static_cache_offset, k, "cache", java_lang_Character_array_signature, true)
4385 
4386 void java_lang_Character_CharacterCache::compute_offsets(InstanceKlass *k) {
4387   guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4388   CHARACTER_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4389 }
4390 
4391 objArrayOop java_lang_Character_CharacterCache::cache(InstanceKlass *ik) {
4392   oop base = ik->static_field_base_raw();
4393   return objArrayOop(base->obj_field(_static_cache_offset));
4394 }
4395 
4396 Symbol* java_lang_Character_CharacterCache::symbol() {
4397   return vmSymbols::java_lang_Character_CharacterCache();
4398 }
4399 
4400 #if INCLUDE_CDS
4401 void java_lang_Character_CharacterCache::serialize_offsets(SerializeClosure* f) {
4402   CHARACTER_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4403 }
4404 #endif
4405 #undef CHARACTER_CACHE_FIELDS_DO
4406 
4407 jchar java_lang_Character::value(oop obj) {
4408    jvalue v;
4409    java_lang_boxing_object::get_value(obj, &v);
4410    return v.c;
4411 }
4412 
4413 #define SHORT_CACHE_FIELDS_DO(macro) \
4414   macro(_static_cache_offset, k, "cache", java_lang_Short_array_signature, true)
4415 
4416 void java_lang_Short_ShortCache::compute_offsets(InstanceKlass *k) {
4417   guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4418   SHORT_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4419 }
4420 
4421 objArrayOop java_lang_Short_ShortCache::cache(InstanceKlass *ik) {
4422   oop base = ik->static_field_base_raw();
4423   return objArrayOop(base->obj_field(_static_cache_offset));
4424 }
4425 
4426 Symbol* java_lang_Short_ShortCache::symbol() {
4427   return vmSymbols::java_lang_Short_ShortCache();
4428 }
4429 
4430 #if INCLUDE_CDS
4431 void java_lang_Short_ShortCache::serialize_offsets(SerializeClosure* f) {
4432   SHORT_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4433 }
4434 #endif
4435 #undef SHORT_CACHE_FIELDS_DO
4436 
4437 jshort java_lang_Short::value(oop obj) {
4438    jvalue v;
4439    java_lang_boxing_object::get_value(obj, &v);
4440    return v.s;
4441 }
4442 
4443 #define BYTE_CACHE_FIELDS_DO(macro) \
4444   macro(_static_cache_offset, k, "cache", java_lang_Byte_array_signature, true)
4445 
4446 void java_lang_Byte_ByteCache::compute_offsets(InstanceKlass *k) {
4447   guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4448   BYTE_CACHE_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4449 }
4450 
4451 objArrayOop java_lang_Byte_ByteCache::cache(InstanceKlass *ik) {
4452   oop base = ik->static_field_base_raw();
4453   return objArrayOop(base->obj_field(_static_cache_offset));
4454 }
4455 
4456 Symbol* java_lang_Byte_ByteCache::symbol() {
4457   return vmSymbols::java_lang_Byte_ByteCache();
4458 }
4459 
4460 #if INCLUDE_CDS
4461 void java_lang_Byte_ByteCache::serialize_offsets(SerializeClosure* f) {
4462   BYTE_CACHE_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4463 }
4464 #endif
4465 #undef BYTE_CACHE_FIELDS_DO
4466 
4467 jbyte java_lang_Byte::value(oop obj) {
4468    jvalue v;
4469    java_lang_boxing_object::get_value(obj, &v);
4470    return v.b;
4471 }
4472 #define BOOLEAN_FIELDS_DO(macro) \
4473   macro(_static_TRUE_offset, k, "TRUE", java_lang_Boolean_signature, true); \
4474   macro(_static_FALSE_offset, k, "FALSE", java_lang_Boolean_signature, true)
4475 
4476 
4477 void java_lang_Boolean::compute_offsets(InstanceKlass *k) {
4478   guarantee(k != NULL && k->is_initialized(), "must be loaded and initialized");
4479   BOOLEAN_FIELDS_DO(FIELD_COMPUTE_OFFSET);
4480 }
4481 
4482 oop java_lang_Boolean::get_TRUE(InstanceKlass *ik) {
4483   oop base = ik->static_field_base_raw();
4484   return base->obj_field(_static_TRUE_offset);
4485 }
4486 
4487 oop java_lang_Boolean::get_FALSE(InstanceKlass *ik) {
4488   oop base = ik->static_field_base_raw();
4489   return base->obj_field(_static_FALSE_offset);
4490 }
4491 
4492 Symbol* java_lang_Boolean::symbol() {
4493   return vmSymbols::java_lang_Boolean();
4494 }
4495 
4496 #if INCLUDE_CDS
4497 void java_lang_Boolean::serialize_offsets(SerializeClosure* f) {
4498   BOOLEAN_FIELDS_DO(FIELD_SERIALIZE_OFFSET);
4499 }
4500 #endif
4501 #undef BOOLEAN_CACHE_FIELDS_DO
4502 
4503 jboolean java_lang_Boolean::value(oop obj) {
4504    jvalue v;
4505    java_lang_boxing_object::get_value(obj, &v);
4506    return v.z;
4507 }
4508 
4509 static int member_offset(int hardcoded_offset) {
4510   return (hardcoded_offset * heapOopSize) + instanceOopDesc::base_offset_in_bytes();
4511 }
4512 
4513 // Compute hard-coded offsets
4514 // Invoked before SystemDictionary::initialize, so pre-loaded classes
4515 // are not available to determine the offset_of_static_fields.
4516 void JavaClasses::compute_hard_coded_offsets() {
4517 
4518   // java_lang_boxing_object
4519   java_lang_boxing_object::value_offset      = member_offset(java_lang_boxing_object::hc_value_offset);
4520   java_lang_boxing_object::long_value_offset = align_up(member_offset(java_lang_boxing_object::hc_value_offset), BytesPerLong);
4521 
4522   // java_lang_ref_Reference
4523   java_lang_ref_Reference::referent_offset    = member_offset(java_lang_ref_Reference::hc_referent_offset);
4524   java_lang_ref_Reference::queue_offset       = member_offset(java_lang_ref_Reference::hc_queue_offset);
4525   java_lang_ref_Reference::next_offset        = member_offset(java_lang_ref_Reference::hc_next_offset);
4526   java_lang_ref_Reference::discovered_offset  = member_offset(java_lang_ref_Reference::hc_discovered_offset);
4527 }
4528 
4529 #define DO_COMPUTE_OFFSETS(k) k::compute_offsets();
4530 
4531 // Compute non-hard-coded field offsets of all the classes in this file
4532 void JavaClasses::compute_offsets() {
4533   if (UseSharedSpaces) {
4534     assert(JvmtiExport::is_early_phase() && !(JvmtiExport::should_post_class_file_load_hook() &&
4535                                               JvmtiExport::has_early_class_hook_env()),
4536            "JavaClasses::compute_offsets() must be called in early JVMTI phase.");
4537     // None of the classes used by the rest of this function can be replaced by
4538     // JMVTI ClassFileLoadHook.
4539     // We are safe to use the archived offsets, which have already been restored
4540     // by JavaClasses::serialize_offsets, without computing the offsets again.
4541     return;
4542   }
4543 
4544   // We have already called the compute_offsets() of the
4545   // BASIC_JAVA_CLASSES_DO_PART1 classes (java_lang_String and java_lang_Class)
4546   // earlier inside SystemDictionary::resolve_well_known_classes()
4547   BASIC_JAVA_CLASSES_DO_PART2(DO_COMPUTE_OFFSETS);
4548 }
4549 
4550 #if INCLUDE_CDS
4551 #define DO_SERIALIZE_OFFSETS(k) k::serialize_offsets(soc);
4552 
4553 void JavaClasses::serialize_offsets(SerializeClosure* soc) {
4554   BASIC_JAVA_CLASSES_DO(DO_SERIALIZE_OFFSETS);
4555 }
4556 #endif
4557 
4558 
4559 #ifndef PRODUCT
4560 
4561 // These functions exist to assert the validity of hard-coded field offsets to guard
4562 // against changes in the class files
4563 
4564 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
4565   EXCEPTION_MARK;
4566   fieldDescriptor fd;
4567   TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name);
4568   Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
4569   InstanceKlass* ik = InstanceKlass::cast(k);
4570   TempNewSymbol f_name = SymbolTable::new_symbol(field_name);
4571   TempNewSymbol f_sig  = SymbolTable::new_symbol(field_sig);
4572   if (!ik->find_local_field(f_name, f_sig, &fd)) {
4573     tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
4574     return false;
4575   }
4576   if (fd.is_static()) {
4577     tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
4578     return false;
4579   }
4580   if (fd.offset() == hardcoded_offset ) {
4581     return true;
4582   } else {
4583     tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
4584                   klass_name, field_name, hardcoded_offset, fd.offset());
4585     return false;
4586   }
4587 }
4588 
4589 // Check the hard-coded field offsets of all the classes in this file
4590 
4591 void JavaClasses::check_offsets() {
4592   bool valid = true;
4593 
4594 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
4595   valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
4596 
4597 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
4598   valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
4599 
4600   // Boxed primitive objects (java_lang_boxing_object)
4601 
4602   CHECK_OFFSET("java/lang/Boolean",   java_lang_boxing_object, value, "Z");
4603   CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
4604   CHECK_OFFSET("java/lang/Float",     java_lang_boxing_object, value, "F");
4605   CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
4606   CHECK_OFFSET("java/lang/Byte",      java_lang_boxing_object, value, "B");
4607   CHECK_OFFSET("java/lang/Short",     java_lang_boxing_object, value, "S");
4608   CHECK_OFFSET("java/lang/Integer",   java_lang_boxing_object, value, "I");
4609   CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
4610 
4611   // java.lang.ref.Reference
4612 
4613   CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
4614   CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
4615   CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
4616   // Fake field
4617   //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
4618 
4619   if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
4620 }
4621 
4622 #endif // PRODUCT
4623 
4624 int InjectedField::compute_offset() {
4625   InstanceKlass* ik = InstanceKlass::cast(klass());
4626   for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4627     if (!may_be_java && !fs.access_flags().is_internal()) {
4628       // Only look at injected fields
4629       continue;
4630     }
4631     if (fs.name() == name() && fs.signature() == signature()) {
4632       return fs.offset();
4633     }
4634   }
4635   ResourceMark rm;
4636   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)" : "");
4637 #ifndef PRODUCT
4638   ik->print();
4639   tty->print_cr("all fields:");
4640   for (AllFieldStream fs(ik); !fs.done(); fs.next()) {
4641     tty->print_cr("  name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
4642   }
4643 #endif //PRODUCT
4644   vm_exit_during_initialization("Invalid layout of well-known class: use -Xlog:class+load=info to see the origin of the problem class");
4645   return -1;
4646 }
4647 
4648 void javaClasses_init() {
4649   JavaClasses::compute_offsets();
4650   JavaClasses::check_offsets();
4651   FilteredFieldsMap::initialize();  // must be done after computing offsets.
4652 }