1 /*
   2  * Copyright (c) 1997, 2018, 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/javaClasses.hpp"
  28 #include "classfile/symbolTable.hpp"
  29 #include "classfile/vmSymbols.hpp"
  30 #include "code/debugInfo.hpp"
  31 #include "code/pcDesc.hpp"
  32 #include "compiler/compilerOracle.hpp"
  33 #include "interpreter/interpreter.hpp"
  34 #include "memory/oopFactory.hpp"
  35 #include "memory/resourceArea.hpp"
  36 #include "memory/universe.inline.hpp"
  37 #include "oops/fieldStreams.hpp"
  38 #include "oops/instanceKlass.hpp"
  39 #include "oops/instanceMirrorKlass.hpp"
  40 #include "oops/klass.hpp"
  41 #include "oops/method.hpp"
  42 #include "oops/symbol.hpp"
  43 #include "oops/typeArrayOop.hpp"
  44 #include "prims/jvmtiRedefineClassesTrace.hpp"
  45 #include "runtime/fieldDescriptor.hpp"
  46 #include "runtime/handles.inline.hpp"
  47 #include "runtime/interfaceSupport.hpp"
  48 #include "runtime/java.hpp"
  49 #include "runtime/javaCalls.hpp"
  50 #include "runtime/safepoint.hpp"
  51 #include "runtime/thread.inline.hpp"
  52 #include "runtime/vframe.hpp"
  53 #include "utilities/preserveException.hpp"
  54 
  55 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
  56 
  57 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java)    \
  58   klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum);
  59 
  60 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java)           \
  61   { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java },
  62 
  63 InjectedField JavaClasses::_injected_fields[] = {
  64   ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
  65 };
  66 
  67 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
  68   return _injected_fields[id].compute_offset();
  69 }
  70 
  71 
  72 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
  73   *field_count = 0;
  74 
  75   vmSymbols::SID sid = vmSymbols::find_sid(class_name);
  76   if (sid == vmSymbols::NO_SID) {
  77     // Only well known classes can inject fields
  78     return NULL;
  79   }
  80 
  81   int count = 0;
  82   int start = -1;
  83 
  84 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
  85   if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) {              \
  86     count++;                                                       \
  87     if (start == -1) start = klass##_##name##_enum;                \
  88   }
  89   ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
  90 #undef LOOKUP_INJECTED_FIELD
  91 
  92   if (start != -1) {
  93     *field_count = count;
  94     return _injected_fields + start;
  95   }
  96   return NULL;
  97 }
  98 
  99 
 100 static bool find_field(InstanceKlass* ik,
 101                        Symbol* name_symbol, Symbol* signature_symbol,
 102                        fieldDescriptor* fd,
 103                        bool allow_super = false) {
 104   if (allow_super)
 105     return ik->find_field(name_symbol, signature_symbol, fd) != NULL;
 106   else
 107     return ik->find_local_field(name_symbol, signature_symbol, fd);
 108 }
 109 
 110 // Helpful routine for computing field offsets at run time rather than hardcoding them
 111 static void
 112 compute_offset(int &dest_offset,
 113                Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol,
 114                bool allow_super = false) {
 115   fieldDescriptor fd;
 116   InstanceKlass* ik = InstanceKlass::cast(klass_oop);
 117   if (!find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) {
 118     ResourceMark rm;
 119     tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string());
 120 #ifndef PRODUCT
 121     klass_oop->print();
 122     tty->print_cr("all fields:");
 123     for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
 124       tty->print_cr("  name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
 125     }
 126 #endif //PRODUCT
 127     vm_exit_during_initialization("Invalid layout of preloaded class: use -XX:+TraceClassLoading to see the origin of the problem class");
 128   }
 129   dest_offset = fd.offset();
 130 }
 131 
 132 // Same as above but for "optional" offsets that might not be present in certain JDK versions
 133 static void
 134 compute_optional_offset(int& dest_offset,
 135                         Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol,
 136                         bool allow_super = false) {
 137   fieldDescriptor fd;
 138   InstanceKlass* ik = InstanceKlass::cast(klass_oop);
 139   if (find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) {
 140     dest_offset = fd.offset();
 141   }
 142 }
 143 
 144 
 145 int java_lang_String::value_offset  = 0;
 146 int java_lang_String::offset_offset = 0;
 147 int java_lang_String::count_offset  = 0;
 148 int java_lang_String::hash_offset   = 0;
 149 
 150 bool java_lang_String::initialized  = false;
 151 
 152 void java_lang_String::compute_offsets() {
 153   assert(!initialized, "offsets should be initialized only once");
 154 
 155   Klass* k = SystemDictionary::String_klass();
 156   compute_offset(value_offset,           k, vmSymbols::value_name(),  vmSymbols::char_array_signature());
 157   compute_optional_offset(offset_offset, k, vmSymbols::offset_name(), vmSymbols::int_signature());
 158   compute_optional_offset(count_offset,  k, vmSymbols::count_name(),  vmSymbols::int_signature());
 159   compute_optional_offset(hash_offset,   k, vmSymbols::hash_name(),   vmSymbols::int_signature());
 160 
 161   initialized = true;
 162 }
 163 
 164 Handle java_lang_String::basic_create(int length, TRAPS) {
 165   assert(initialized, "Must be initialized");
 166   // Create the String object first, so there's a chance that the String
 167   // and the char array it points to end up in the same cache line.
 168   oop obj;
 169   obj = InstanceKlass::cast(SystemDictionary::String_klass())->allocate_instance(CHECK_NH);
 170 
 171   // Create the char array.  The String object must be handlized here
 172   // because GC can happen as a result of the allocation attempt.
 173   Handle h_obj(THREAD, obj);
 174   typeArrayOop buffer;
 175     buffer = oopFactory::new_charArray(length, CHECK_NH);
 176 
 177   // Point the String at the char array
 178   obj = h_obj();
 179   set_value(obj, buffer);
 180   // No need to zero the offset, allocation zero'ed the entire String object
 181   assert(offset(obj) == 0, "initial String offset should be zero");
 182 //set_offset(obj, 0);
 183   set_count(obj, length);
 184 
 185   return h_obj;
 186 }
 187 
 188 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) {
 189   Handle h_obj = basic_create(length, CHECK_NH);
 190   typeArrayOop buffer = value(h_obj());
 191   for (int index = 0; index < length; index++) {
 192     buffer->char_at_put(index, unicode[index]);
 193   }
 194   return h_obj;
 195 }
 196 
 197 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) {
 198   Handle h_obj = create_from_unicode(unicode, length, CHECK_0);
 199   return h_obj();
 200 }
 201 
 202 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
 203   if (utf8_str == NULL) {
 204     return Handle();
 205   }
 206   int length = UTF8::unicode_length(utf8_str);
 207   Handle h_obj = basic_create(length, CHECK_NH);
 208   if (length > 0) {
 209     UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
 210   }
 211   return h_obj;
 212 }
 213 
 214 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
 215   Handle h_obj = create_from_str(utf8_str, CHECK_0);
 216   return h_obj();
 217 }
 218 
 219 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
 220   int length = UTF8::unicode_length((char*)symbol->bytes(), symbol->utf8_length());
 221   Handle h_obj = basic_create(length, CHECK_NH);
 222   if (length > 0) {
 223     UTF8::convert_to_unicode((char*)symbol->bytes(), value(h_obj())->char_at_addr(0), length);
 224   }
 225   return h_obj;
 226 }
 227 
 228 // Converts a C string to a Java String based on current encoding
 229 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
 230   assert(str != NULL, "bad arguments");
 231 
 232   typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
 233   static to_java_string_fn_t _to_java_string_fn = NULL;
 234 
 235   if (_to_java_string_fn == NULL) {
 236     void *lib_handle = os::native_java_library();
 237     _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform"));
 238     if (_to_java_string_fn == NULL) {
 239       fatal("NewStringPlatform missing");
 240     }
 241   }
 242 
 243   jstring js = NULL;
 244   { JavaThread* thread = (JavaThread*)THREAD;
 245     assert(thread->is_Java_thread(), "must be java thread");
 246     HandleMark hm(thread);
 247     ThreadToNativeFromVM ttn(thread);
 248     js = (_to_java_string_fn)(thread->jni_environment(), str);
 249   }
 250   return Handle(THREAD, JNIHandles::resolve(js));
 251 }
 252 
 253 // Converts a Java String to a native C string that can be used for
 254 // native OS calls.
 255 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
 256 
 257   typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
 258   static to_platform_string_fn_t _to_platform_string_fn = NULL;
 259 
 260   if (_to_platform_string_fn == NULL) {
 261     void *lib_handle = os::native_java_library();
 262     _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
 263     if (_to_platform_string_fn == NULL) {
 264       fatal("GetStringPlatformChars missing");
 265     }
 266   }
 267 
 268   char *native_platform_string;
 269   { JavaThread* thread = (JavaThread*)THREAD;
 270     assert(thread->is_Java_thread(), "must be java thread");
 271     JNIEnv *env = thread->jni_environment();
 272     jstring js = (jstring) JNIHandles::make_local(env, java_string());
 273     bool is_copy;
 274     HandleMark hm(thread);
 275     ThreadToNativeFromVM ttn(thread);
 276     native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
 277     assert(is_copy == JNI_TRUE, "is_copy value changed");
 278     JNIHandles::destroy_local(js);
 279   }
 280   return native_platform_string;
 281 }
 282 
 283 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
 284   oop          obj    = java_string();
 285   // Typical usage is to convert all '/' to '.' in string.
 286   typeArrayOop value  = java_lang_String::value(obj);
 287   int          offset = java_lang_String::offset(obj);
 288   int          length = java_lang_String::length(obj);
 289 
 290   // First check if any from_char exist
 291   int index; // Declared outside, used later
 292   for (index = 0; index < length; index++) {
 293     if (value->char_at(index + offset) == from_char) {
 294       break;
 295     }
 296   }
 297   if (index == length) {
 298     // No from_char, so do not copy.
 299     return java_string;
 300   }
 301 
 302   // Create new UNICODE buffer. Must handlize value because GC
 303   // may happen during String and char array creation.
 304   typeArrayHandle h_value(THREAD, value);
 305   Handle string = basic_create(length, CHECK_NH);
 306 
 307   typeArrayOop from_buffer = h_value();
 308   typeArrayOop to_buffer   = java_lang_String::value(string());
 309 
 310   // Copy contents
 311   for (index = 0; index < length; index++) {
 312     jchar c = from_buffer->char_at(index + offset);
 313     if (c == from_char) {
 314       c = to_char;
 315     }
 316     to_buffer->char_at_put(index, c);
 317   }
 318   return string;
 319 }
 320 
 321 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
 322   typeArrayOop value  = java_lang_String::value(java_string);
 323   int          offset = java_lang_String::offset(java_string);
 324                length = java_lang_String::length(java_string);
 325 
 326   jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
 327   if (result != NULL) {
 328     for (int index = 0; index < length; index++) {
 329       result[index] = value->char_at(index + offset);
 330     }
 331   } else {
 332     THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
 333   }
 334   return result;
 335 }
 336 
 337 unsigned int java_lang_String::hash_code(oop java_string) {
 338   int          length = java_lang_String::length(java_string);
 339   // Zero length string will hash to zero with String.hashCode() function.
 340   if (length == 0) return 0;
 341 
 342   typeArrayOop value  = java_lang_String::value(java_string);
 343   int          offset = java_lang_String::offset(java_string);
 344   return java_lang_String::hash_code(value->char_at_addr(offset), length);
 345 }
 346 
 347 char* java_lang_String::as_quoted_ascii(oop java_string) {
 348   typeArrayOop value  = java_lang_String::value(java_string);
 349   int          offset = java_lang_String::offset(java_string);
 350   int          length = java_lang_String::length(java_string);
 351 
 352   jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
 353   if (base == NULL) return NULL;
 354 
 355   int result_length = UNICODE::quoted_ascii_length(base, length) + 1;
 356   char* result = NEW_RESOURCE_ARRAY(char, result_length);
 357   UNICODE::as_quoted_ascii(base, length, result, result_length);
 358   assert(result_length >= length + 1, "must not be shorter");
 359   assert(result_length == (int)strlen(result) + 1, "must match");
 360   return result;
 361 }
 362 
 363 unsigned int java_lang_String::hash_string(oop java_string) {
 364   int          length = java_lang_String::length(java_string);
 365   // Zero length string doesn't hash necessarily hash to zero.
 366   if (length == 0) {
 367     return StringTable::hash_string(NULL, 0);
 368   }
 369 
 370   typeArrayOop value  = java_lang_String::value(java_string);
 371   int          offset = java_lang_String::offset(java_string);
 372   return StringTable::hash_string(value->char_at_addr(offset), length);
 373 }
 374 
 375 Symbol* java_lang_String::as_symbol(Handle java_string, TRAPS) {
 376   oop          obj    = java_string();
 377   typeArrayOop value  = java_lang_String::value(obj);
 378   int          offset = java_lang_String::offset(obj);
 379   int          length = java_lang_String::length(obj);
 380   jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
 381   Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD);
 382   return sym;
 383 }
 384 
 385 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
 386   typeArrayOop value  = java_lang_String::value(java_string);
 387   int          offset = java_lang_String::offset(java_string);
 388   int          length = java_lang_String::length(java_string);
 389   jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
 390   return SymbolTable::probe_unicode(base, length);
 391 }
 392 
 393 
 394 int java_lang_String::utf8_length(oop java_string) {
 395   typeArrayOop value  = java_lang_String::value(java_string);
 396   int          offset = java_lang_String::offset(java_string);
 397   int          length = java_lang_String::length(java_string);
 398   jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
 399   return UNICODE::utf8_length(position, length);
 400 }
 401 
 402 char* java_lang_String::as_utf8_string(oop java_string) {
 403   typeArrayOop value  = java_lang_String::value(java_string);
 404   int          offset = java_lang_String::offset(java_string);
 405   int          length = java_lang_String::length(java_string);
 406   jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
 407   return UNICODE::as_utf8(position, length);
 408 }
 409 
 410 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
 411   typeArrayOop value  = java_lang_String::value(java_string);
 412   int          offset = java_lang_String::offset(java_string);
 413   int          length = java_lang_String::length(java_string);
 414   jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
 415   return UNICODE::as_utf8(position, length, buf, buflen);
 416 }
 417 
 418 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
 419   typeArrayOop value  = java_lang_String::value(java_string);
 420   int          offset = java_lang_String::offset(java_string);
 421   int          length = java_lang_String::length(java_string);
 422   assert(start + len <= length, "just checking");
 423   jchar* position = value->char_at_addr(offset + start);
 424   return UNICODE::as_utf8(position, len);
 425 }
 426 
 427 bool java_lang_String::equals(oop java_string, jchar* chars, int len) {
 428   assert(java_string->klass() == SystemDictionary::String_klass(),
 429          "must be java_string");
 430   typeArrayOop value  = java_lang_String::value(java_string);
 431   int          offset = java_lang_String::offset(java_string);
 432   int          length = java_lang_String::length(java_string);
 433   if (length != len) {
 434     return false;
 435   }
 436   for (int i = 0; i < len; i++) {
 437     if (value->char_at(i + offset) != chars[i]) {
 438       return false;
 439     }
 440   }
 441   return true;
 442 }
 443 
 444 bool java_lang_String::equals(oop str1, oop str2) {
 445   assert(str1->klass() == SystemDictionary::String_klass(),
 446          "must be java String");
 447   assert(str2->klass() == SystemDictionary::String_klass(),
 448          "must be java String");
 449   typeArrayOop value1  = java_lang_String::value(str1);
 450   int          offset1 = java_lang_String::offset(str1);
 451   int          length1 = java_lang_String::length(str1);
 452   typeArrayOop value2  = java_lang_String::value(str2);
 453   int          offset2 = java_lang_String::offset(str2);
 454   int          length2 = java_lang_String::length(str2);
 455 
 456   if (length1 != length2) {
 457     return false;
 458   }
 459   for (int i = 0; i < length1; i++) {
 460     if (value1->char_at(i + offset1) != value2->char_at(i + offset2)) {
 461       return false;
 462     }
 463   }
 464   return true;
 465 }
 466 
 467 void java_lang_String::print(oop java_string, outputStream* st) {
 468   assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string");
 469   typeArrayOop value  = java_lang_String::value(java_string);
 470   int          offset = java_lang_String::offset(java_string);
 471   int          length = java_lang_String::length(java_string);
 472 
 473   int end = MIN2(length, 100);
 474   if (value == NULL) {
 475     // This can happen if, e.g., printing a String
 476     // object before its initializer has been called
 477     st->print_cr("NULL");
 478   } else {
 479     st->print("\"");
 480     for (int index = 0; index < length; index++) {
 481       st->print("%c", value->char_at(index + offset));
 482     }
 483     st->print("\"");
 484   }
 485 }
 486 
 487 
 488 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
 489   assert(mirror.not_null() && fd->is_static(), "just checking");
 490   if (fd->has_initial_value()) {
 491     BasicType t = fd->field_type();
 492     switch (t) {
 493       case T_BYTE:
 494         mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
 495               break;
 496       case T_BOOLEAN:
 497         mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
 498               break;
 499       case T_CHAR:
 500         mirror()->char_field_put(fd->offset(), fd->int_initial_value());
 501               break;
 502       case T_SHORT:
 503         mirror()->short_field_put(fd->offset(), fd->int_initial_value());
 504               break;
 505       case T_INT:
 506         mirror()->int_field_put(fd->offset(), fd->int_initial_value());
 507         break;
 508       case T_FLOAT:
 509         mirror()->float_field_put(fd->offset(), fd->float_initial_value());
 510         break;
 511       case T_DOUBLE:
 512         mirror()->double_field_put(fd->offset(), fd->double_initial_value());
 513         break;
 514       case T_LONG:
 515         mirror()->long_field_put(fd->offset(), fd->long_initial_value());
 516         break;
 517       case T_OBJECT:
 518         {
 519           #ifdef ASSERT
 520           TempNewSymbol sym = SymbolTable::new_symbol("Ljava/lang/String;", CHECK);
 521           assert(fd->signature() == sym, "just checking");
 522           #endif
 523           oop string = fd->string_initial_value(CHECK);
 524           mirror()->obj_field_put(fd->offset(), string);
 525         }
 526         break;
 527       default:
 528         THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
 529                   "Illegal ConstantValue attribute in class file");
 530     }
 531   }
 532 }
 533 
 534 
 535 void java_lang_Class::fixup_mirror(KlassHandle k, TRAPS) {
 536   assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
 537 
 538   // If the offset was read from the shared archive, it was fixed up already
 539   if (!k->is_shared()) {
 540     if (k->oop_is_instance()) {
 541       // During bootstrap, java.lang.Class wasn't loaded so static field
 542       // offsets were computed without the size added it.  Go back and
 543       // update all the static field offsets to included the size.
 544         for (JavaFieldStream fs(InstanceKlass::cast(k())); !fs.done(); fs.next()) {
 545         if (fs.access_flags().is_static()) {
 546           int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields();
 547           fs.set_offset(real_offset);
 548         }
 549       }
 550     }
 551   }
 552   create_mirror(k, Handle(NULL), Handle(NULL), CHECK);
 553 }
 554 
 555 void java_lang_Class::initialize_mirror_fields(KlassHandle k,
 556                                                Handle mirror,
 557                                                Handle protection_domain,
 558                                                TRAPS) {
 559   // Allocate a simple java object for a lock.
 560   // This needs to be a java object because during class initialization
 561   // it can be held across a java call.
 562   typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
 563   set_init_lock(mirror(), r);
 564 
 565   // Set protection domain also
 566   set_protection_domain(mirror(), protection_domain());
 567 
 568   // Initialize static fields
 569   InstanceKlass::cast(k())->do_local_static_fields(&initialize_static_field, mirror, CHECK);
 570 }
 571 
 572 void java_lang_Class::create_mirror(KlassHandle k, Handle class_loader,
 573                                     Handle protection_domain, TRAPS) {
 574   assert(k->java_mirror() == NULL, "should only assign mirror once");
 575   // Use this moment of initialization to cache modifier_flags also,
 576   // to support Class.getModifiers().  Instance classes recalculate
 577   // the cached flags after the class file is parsed, but before the
 578   // class is put into the system dictionary.
 579   int computed_modifiers = k->compute_modifier_flags(CHECK);
 580   k->set_modifier_flags(computed_modifiers);
 581   // Class_klass has to be loaded because it is used to allocate
 582   // the mirror.
 583   if (SystemDictionary::Class_klass_loaded()) {
 584     // Allocate mirror (java.lang.Class instance)
 585     Handle mirror = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK);
 586 
 587     // Setup indirection from mirror->klass
 588     if (!k.is_null()) {
 589       java_lang_Class::set_klass(mirror(), k());
 590     }
 591 
 592     InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
 593     assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
 594 
 595     java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
 596 
 597     // It might also have a component mirror.  This mirror must already exist.
 598     if (k->oop_is_array()) {
 599       Handle comp_mirror;
 600       if (k->oop_is_typeArray()) {
 601         BasicType type = TypeArrayKlass::cast(k())->element_type();
 602         comp_mirror = Universe::java_mirror(type);
 603       } else {
 604         assert(k->oop_is_objArray(), "Must be");
 605         Klass* element_klass = ObjArrayKlass::cast(k())->element_klass();
 606         assert(element_klass != NULL, "Must have an element klass");
 607         comp_mirror = element_klass->java_mirror();
 608       }
 609       assert(comp_mirror.not_null(), "must have a mirror");
 610 
 611       // Two-way link between the array klass and its component mirror:
 612       ArrayKlass::cast(k())->set_component_mirror(comp_mirror());
 613       set_array_klass(comp_mirror(), k());
 614     } else {
 615       assert(k->oop_is_instance(), "Must be");
 616 
 617       initialize_mirror_fields(k, mirror, protection_domain, THREAD);
 618       if (HAS_PENDING_EXCEPTION) {
 619         // If any of the fields throws an exception like OOM remove the klass field
 620         // from the mirror so GC doesn't follow it after the klass has been deallocated.
 621         // This mirror looks like a primitive type, which logically it is because it
 622         // it represents no class.
 623         java_lang_Class::set_klass(mirror(), NULL);
 624         return;
 625       }
 626     }
 627 
 628     // set the classLoader field in the java_lang_Class instance
 629     assert(class_loader() == k->class_loader(), "should be same");
 630     set_class_loader(mirror(), class_loader());
 631 
 632     // Setup indirection from klass->mirror last
 633     // after any exceptions can happen during allocations.
 634     if (!k.is_null()) {
 635       k->set_java_mirror(mirror());
 636     }
 637   } else {
 638     if (fixup_mirror_list() == NULL) {
 639       GrowableArray<Klass*>* list =
 640        new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true);
 641       set_fixup_mirror_list(list);
 642     }
 643     fixup_mirror_list()->push(k());
 644   }
 645 }
 646 
 647 
 648 int  java_lang_Class::oop_size(oop java_class) {
 649   assert(_oop_size_offset != 0, "must be set");
 650   return java_class->int_field(_oop_size_offset);
 651 }
 652 void java_lang_Class::set_oop_size(oop java_class, int size) {
 653   assert(_oop_size_offset != 0, "must be set");
 654   java_class->int_field_put(_oop_size_offset, size);
 655 }
 656 int  java_lang_Class::static_oop_field_count(oop java_class) {
 657   assert(_static_oop_field_count_offset != 0, "must be set");
 658   return java_class->int_field(_static_oop_field_count_offset);
 659 }
 660 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
 661   assert(_static_oop_field_count_offset != 0, "must be set");
 662   java_class->int_field_put(_static_oop_field_count_offset, size);
 663 }
 664 
 665 oop java_lang_Class::protection_domain(oop java_class) {
 666   assert(_protection_domain_offset != 0, "must be set");
 667   return java_class->obj_field(_protection_domain_offset);
 668 }
 669 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
 670   assert(_protection_domain_offset != 0, "must be set");
 671   java_class->obj_field_put(_protection_domain_offset, pd);
 672 }
 673 
 674 oop java_lang_Class::init_lock(oop java_class) {
 675   assert(_init_lock_offset != 0, "must be set");
 676   return java_class->obj_field(_init_lock_offset);
 677 }
 678 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
 679   assert(_init_lock_offset != 0, "must be set");
 680   java_class->obj_field_put(_init_lock_offset, init_lock);
 681 }
 682 
 683 objArrayOop java_lang_Class::signers(oop java_class) {
 684   assert(_signers_offset != 0, "must be set");
 685   return (objArrayOop)java_class->obj_field(_signers_offset);
 686 }
 687 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
 688   assert(_signers_offset != 0, "must be set");
 689   java_class->obj_field_put(_signers_offset, (oop)signers);
 690 }
 691 
 692 
 693 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
 694   // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet.
 695   if (_class_loader_offset != 0) {
 696     java_class->obj_field_put(_class_loader_offset, loader);
 697   }
 698 }
 699 
 700 oop java_lang_Class::class_loader(oop java_class) {
 701   assert(_class_loader_offset != 0, "must be set");
 702   return java_class->obj_field(_class_loader_offset);
 703 }
 704 
 705 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
 706   // This should be improved by adding a field at the Java level or by
 707   // introducing a new VM klass (see comment in ClassFileParser)
 708   oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0);
 709   if (type != T_VOID) {
 710     Klass* aklass = Universe::typeArrayKlassObj(type);
 711     assert(aklass != NULL, "correct bootstrap");
 712     set_array_klass(java_class, aklass);
 713   }
 714 #ifdef ASSERT
 715   InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass());
 716   assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
 717 #endif
 718   return java_class;
 719 }
 720 
 721 
 722 Klass* java_lang_Class::as_Klass(oop java_class) {
 723   //%note memory_2
 724   assert(java_lang_Class::is_instance(java_class), "must be a Class object");
 725   Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
 726   assert(k == NULL || k->is_klass(), "type check");
 727   return k;
 728 }
 729 
 730 
 731 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
 732   assert(java_lang_Class::is_instance(java_class), "must be a Class object");
 733   java_class->metadata_field_put(_klass_offset, klass);
 734 }
 735 
 736 
 737 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
 738   assert(java_lang_Class::is_instance(java_class), "must be a Class object");
 739   Symbol* name = NULL;
 740   bool is_instance = false;
 741   if (is_primitive(java_class)) {
 742     name = vmSymbols::type_signature(primitive_type(java_class));
 743   } else {
 744     Klass* k = as_Klass(java_class);
 745     is_instance = k->oop_is_instance();
 746     name = k->name();
 747   }
 748   if (name == NULL) {
 749     st->print("<null>");
 750     return;
 751   }
 752   if (is_instance)  st->print("L");
 753   st->write((char*) name->base(), (int) name->utf8_length());
 754   if (is_instance)  st->print(";");
 755 }
 756 
 757 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) {
 758   assert(java_lang_Class::is_instance(java_class), "must be a Class object");
 759   Symbol* name;
 760   if (is_primitive(java_class)) {
 761     name = vmSymbols::type_signature(primitive_type(java_class));
 762     // Because this can create a new symbol, the caller has to decrement
 763     // the refcount, so make adjustment here and below for symbols returned
 764     // that are not created or incremented due to a successful lookup.
 765     name->increment_refcount();
 766   } else {
 767     Klass* k = as_Klass(java_class);
 768     if (!k->oop_is_instance()) {
 769       name = k->name();
 770       name->increment_refcount();
 771     } else {
 772       ResourceMark rm;
 773       const char* sigstr = k->signature_name();
 774       int         siglen = (int) strlen(sigstr);
 775       if (!intern_if_not_found) {
 776         name = SymbolTable::probe(sigstr, siglen);
 777       } else {
 778         name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
 779       }
 780     }
 781   }
 782   return name;
 783 }
 784 
 785 // Returns the Java name for this Java mirror (Resource allocated)
 786 // See Klass::external_name().
 787 // For primitive type Java mirrors, its type name is returned.
 788 const char* java_lang_Class::as_external_name(oop java_class) {
 789   assert(java_lang_Class::is_instance(java_class), "must be a Class object");
 790   const char* name = NULL;
 791   if (is_primitive(java_class)) {
 792     name = type2name(primitive_type(java_class));
 793   } else {
 794     name = as_Klass(java_class)->external_name();
 795   }
 796   if (name == NULL) {
 797     name = "<null>";
 798   }
 799   return name;
 800 }
 801 
 802 Klass* java_lang_Class::array_klass(oop java_class) {
 803   Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
 804   assert(k == NULL || k->is_klass() && k->oop_is_array(), "should be array klass");
 805   return k;
 806 }
 807 
 808 
 809 void java_lang_Class::set_array_klass(oop java_class, Klass* klass) {
 810   assert(klass->is_klass() && klass->oop_is_array(), "should be array klass");
 811   java_class->metadata_field_put(_array_klass_offset, klass);
 812 }
 813 
 814 
 815 bool java_lang_Class::is_primitive(oop java_class) {
 816   // should assert:
 817   //assert(java_lang_Class::is_instance(java_class), "must be a Class object");
 818   bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL);
 819 
 820 #ifdef ASSERT
 821   if (is_primitive) {
 822     Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
 823     assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()),
 824         "Should be either the T_VOID primitive or a java primitive");
 825   }
 826 #endif
 827 
 828   return is_primitive;
 829 }
 830 
 831 
 832 BasicType java_lang_Class::primitive_type(oop java_class) {
 833   assert(java_lang_Class::is_primitive(java_class), "just checking");
 834   Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
 835   BasicType type = T_VOID;
 836   if (ak != NULL) {
 837     // Note: create_basic_type_mirror above initializes ak to a non-null value.
 838     type = ArrayKlass::cast(ak)->element_type();
 839   } else {
 840     assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
 841   }
 842   assert(Universe::java_mirror(type) == java_class, "must be consistent");
 843   return type;
 844 }
 845 
 846 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
 847   assert(java_lang_Class::is_instance(java_class), "must be a Class object");
 848   if (is_primitive(java_class)) {
 849     if (reference_klass != NULL)
 850       (*reference_klass) = NULL;
 851     return primitive_type(java_class);
 852   } else {
 853     if (reference_klass != NULL)
 854       (*reference_klass) = as_Klass(java_class);
 855     return T_OBJECT;
 856   }
 857 }
 858 
 859 
 860 oop java_lang_Class::primitive_mirror(BasicType t) {
 861   oop mirror = Universe::java_mirror(t);
 862   assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
 863   assert(java_lang_Class::is_primitive(mirror), "must be primitive");
 864   return mirror;
 865 }
 866 
 867 bool java_lang_Class::offsets_computed = false;
 868 int  java_lang_Class::classRedefinedCount_offset = -1;
 869 
 870 void java_lang_Class::compute_offsets() {
 871   assert(!offsets_computed, "offsets should be initialized only once");
 872   offsets_computed = true;
 873 
 874   Klass* klass_oop = SystemDictionary::Class_klass();
 875   // The classRedefinedCount field is only present starting in 1.5,
 876   // so don't go fatal.
 877   compute_optional_offset(classRedefinedCount_offset,
 878                           klass_oop, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature());
 879 
 880   // Needs to be optional because the old build runs Queens during bootstrapping
 881   // and jdk8-9 doesn't have coordinated pushes yet.
 882   compute_optional_offset(_class_loader_offset,
 883                  klass_oop, vmSymbols::classLoader_name(),
 884                  vmSymbols::classloader_signature());
 885 
 886   CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
 887 }
 888 
 889 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
 890   if (!JDK_Version::is_gte_jdk15x_version()
 891       || classRedefinedCount_offset == -1) {
 892     // The classRedefinedCount field is only present starting in 1.5.
 893     // If we don't have an offset for it then just return -1 as a marker.
 894     return -1;
 895   }
 896 
 897   return the_class_mirror->int_field(classRedefinedCount_offset);
 898 }
 899 
 900 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
 901   if (!JDK_Version::is_gte_jdk15x_version()
 902       || classRedefinedCount_offset == -1) {
 903     // The classRedefinedCount field is only present starting in 1.5.
 904     // If we don't have an offset for it then nothing to set.
 905     return;
 906   }
 907 
 908   the_class_mirror->int_field_put(classRedefinedCount_offset, value);
 909 }
 910 
 911 
 912 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
 913 //       platform thread structure, and a eetop offset which was used for thread
 914 //       local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
 915 //       merged, so in the HotSpot VM we just use the eetop field for the thread
 916 //       instead of the privateInfo_offset.
 917 //
 918 // Note: The stackSize field is only present starting in 1.4.
 919 
 920 int java_lang_Thread::_name_offset = 0;
 921 int java_lang_Thread::_group_offset = 0;
 922 int java_lang_Thread::_contextClassLoader_offset = 0;
 923 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
 924 int java_lang_Thread::_priority_offset = 0;
 925 int java_lang_Thread::_eetop_offset = 0;
 926 int java_lang_Thread::_daemon_offset = 0;
 927 int java_lang_Thread::_stillborn_offset = 0;
 928 int java_lang_Thread::_stackSize_offset = 0;
 929 int java_lang_Thread::_tid_offset = 0;
 930 int java_lang_Thread::_thread_status_offset = 0;
 931 int java_lang_Thread::_park_blocker_offset = 0;
 932 int java_lang_Thread::_park_event_offset = 0 ;
 933 
 934 
 935 void java_lang_Thread::compute_offsets() {
 936   assert(_group_offset == 0, "offsets should be initialized only once");
 937 
 938   Klass* k = SystemDictionary::Thread_klass();
 939   compute_offset(_name_offset,      k, vmSymbols::name_name(),      vmSymbols::string_signature());
 940   compute_offset(_group_offset,     k, vmSymbols::group_name(),     vmSymbols::threadgroup_signature());
 941   compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature());
 942   compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature());
 943   compute_offset(_priority_offset,  k, vmSymbols::priority_name(),  vmSymbols::int_signature());
 944   compute_offset(_daemon_offset,    k, vmSymbols::daemon_name(),    vmSymbols::bool_signature());
 945   compute_offset(_eetop_offset,     k, vmSymbols::eetop_name(),     vmSymbols::long_signature());
 946   compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature());
 947   // The stackSize field is only present starting in 1.4, so don't go fatal.
 948   compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature());
 949   // The tid and thread_status fields are only present starting in 1.5, so don't go fatal.
 950   compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature());
 951   compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature());
 952   // The parkBlocker field is only present starting in 1.6, so don't go fatal.
 953   compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature());
 954   compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(),
 955  vmSymbols::long_signature());
 956 }
 957 
 958 
 959 JavaThread* java_lang_Thread::thread(oop java_thread) {
 960   return (JavaThread*)java_thread->address_field(_eetop_offset);
 961 }
 962 
 963 
 964 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
 965   java_thread->address_field_put(_eetop_offset, (address)thread);
 966 }
 967 
 968 
 969 oop java_lang_Thread::name(oop java_thread) {
 970   return java_thread->obj_field(_name_offset);
 971 }
 972 
 973 
 974 void java_lang_Thread::set_name(oop java_thread, oop name) {
 975   java_thread->obj_field_put(_name_offset, name);
 976 }
 977 
 978 
 979 ThreadPriority java_lang_Thread::priority(oop java_thread) {
 980   return (ThreadPriority)java_thread->int_field(_priority_offset);
 981 }
 982 
 983 
 984 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
 985   java_thread->int_field_put(_priority_offset, priority);
 986 }
 987 
 988 
 989 oop java_lang_Thread::threadGroup(oop java_thread) {
 990   return java_thread->obj_field(_group_offset);
 991 }
 992 
 993 
 994 bool java_lang_Thread::is_stillborn(oop java_thread) {
 995   return java_thread->bool_field(_stillborn_offset) != 0;
 996 }
 997 
 998 
 999 // We never have reason to turn the stillborn bit off
1000 void java_lang_Thread::set_stillborn(oop java_thread) {
1001   java_thread->bool_field_put(_stillborn_offset, true);
1002 }
1003 
1004 
1005 bool java_lang_Thread::is_alive(oop java_thread) {
1006   JavaThread* thr = java_lang_Thread::thread(java_thread);
1007   return (thr != NULL);
1008 }
1009 
1010 
1011 bool java_lang_Thread::is_daemon(oop java_thread) {
1012   return java_thread->bool_field(_daemon_offset) != 0;
1013 }
1014 
1015 
1016 void java_lang_Thread::set_daemon(oop java_thread) {
1017   java_thread->bool_field_put(_daemon_offset, true);
1018 }
1019 
1020 oop java_lang_Thread::context_class_loader(oop java_thread) {
1021   return java_thread->obj_field(_contextClassLoader_offset);
1022 }
1023 
1024 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1025   return java_thread->obj_field(_inheritedAccessControlContext_offset);
1026 }
1027 
1028 
1029 jlong java_lang_Thread::stackSize(oop java_thread) {
1030   // The stackSize field is only present starting in 1.4
1031   if (_stackSize_offset > 0) {
1032     assert(JDK_Version::is_gte_jdk14x_version(), "sanity check");
1033     return java_thread->long_field(_stackSize_offset);
1034   } else {
1035     return 0;
1036   }
1037 }
1038 
1039 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1040 void java_lang_Thread::set_thread_status(oop java_thread,
1041                                          java_lang_Thread::ThreadStatus status) {
1042   // The threadStatus is only present starting in 1.5
1043   if (_thread_status_offset > 0) {
1044     java_thread->int_field_put(_thread_status_offset, status);
1045   }
1046 }
1047 
1048 // Read thread status value from threadStatus field in java.lang.Thread java class.
1049 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1050   assert(Threads_lock->owned_by_self() || Thread::current()->is_Watcher_thread() ||
1051          Thread::current()->is_VM_thread() ||
1052          JavaThread::current()->thread_state() == _thread_in_vm,
1053          "Java Thread is not running in vm");
1054   // The threadStatus is only present starting in 1.5
1055   if (_thread_status_offset > 0) {
1056     return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1057   } else {
1058     // All we can easily figure out is if it is alive, but that is
1059     // enough info for a valid unknown status.
1060     // These aren't restricted to valid set ThreadStatus values, so
1061     // use JVMTI values and cast.
1062     JavaThread* thr = java_lang_Thread::thread(java_thread);
1063     if (thr == NULL) {
1064       // the thread hasn't run yet or is in the process of exiting
1065       return NEW;
1066     }
1067     return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
1068   }
1069 }
1070 
1071 
1072 jlong java_lang_Thread::thread_id(oop java_thread) {
1073   // The thread ID field is only present starting in 1.5
1074   if (_tid_offset > 0) {
1075     return java_thread->long_field(_tid_offset);
1076   } else {
1077     return 0;
1078   }
1079 }
1080 
1081 oop java_lang_Thread::park_blocker(oop java_thread) {
1082   assert(JDK_Version::current().supports_thread_park_blocker() &&
1083          _park_blocker_offset != 0, "Must support parkBlocker field");
1084 
1085   if (_park_blocker_offset > 0) {
1086     return java_thread->obj_field(_park_blocker_offset);
1087   }
1088 
1089   return NULL;
1090 }
1091 
1092 jlong java_lang_Thread::park_event(oop java_thread) {
1093   if (_park_event_offset > 0) {
1094     return java_thread->long_field(_park_event_offset);
1095   }
1096   return 0;
1097 }
1098 
1099 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
1100   if (_park_event_offset > 0) {
1101     java_thread->long_field_put(_park_event_offset, ptr);
1102     return true;
1103   }
1104   return false;
1105 }
1106 
1107 
1108 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1109   assert(JDK_Version::is_gte_jdk15x_version() && _thread_status_offset != 0, "Must have thread status");
1110   ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1111   switch (status) {
1112     case NEW                      : return "NEW";
1113     case RUNNABLE                 : return "RUNNABLE";
1114     case SLEEPING                 : return "TIMED_WAITING (sleeping)";
1115     case IN_OBJECT_WAIT           : return "WAITING (on object monitor)";
1116     case IN_OBJECT_WAIT_TIMED     : return "TIMED_WAITING (on object monitor)";
1117     case PARKED                   : return "WAITING (parking)";
1118     case PARKED_TIMED             : return "TIMED_WAITING (parking)";
1119     case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1120     case TERMINATED               : return "TERMINATED";
1121     default                       : return "UNKNOWN";
1122   };
1123 }
1124 int java_lang_ThreadGroup::_parent_offset = 0;
1125 int java_lang_ThreadGroup::_name_offset = 0;
1126 int java_lang_ThreadGroup::_threads_offset = 0;
1127 int java_lang_ThreadGroup::_groups_offset = 0;
1128 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1129 int java_lang_ThreadGroup::_destroyed_offset = 0;
1130 int java_lang_ThreadGroup::_daemon_offset = 0;
1131 int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0;
1132 int java_lang_ThreadGroup::_nthreads_offset = 0;
1133 int java_lang_ThreadGroup::_ngroups_offset = 0;
1134 
1135 oop  java_lang_ThreadGroup::parent(oop java_thread_group) {
1136   assert(java_thread_group->is_oop(), "thread group must be oop");
1137   return java_thread_group->obj_field(_parent_offset);
1138 }
1139 
1140 // ("name as oop" accessor is not necessary)
1141 
1142 typeArrayOop java_lang_ThreadGroup::name(oop java_thread_group) {
1143   oop name = java_thread_group->obj_field(_name_offset);
1144   // ThreadGroup.name can be null
1145   return name == NULL ? (typeArrayOop)NULL : java_lang_String::value(name);
1146 }
1147 
1148 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1149   assert(java_thread_group->is_oop(), "thread group must be oop");
1150   return java_thread_group->int_field(_nthreads_offset);
1151 }
1152 
1153 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1154   oop threads = java_thread_group->obj_field(_threads_offset);
1155   assert(threads != NULL, "threadgroups should have threads");
1156   assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1157   return objArrayOop(threads);
1158 }
1159 
1160 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1161   assert(java_thread_group->is_oop(), "thread group must be oop");
1162   return java_thread_group->int_field(_ngroups_offset);
1163 }
1164 
1165 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1166   oop groups = java_thread_group->obj_field(_groups_offset);
1167   assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1168   return objArrayOop(groups);
1169 }
1170 
1171 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1172   assert(java_thread_group->is_oop(), "thread group must be oop");
1173   return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1174 }
1175 
1176 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1177   assert(java_thread_group->is_oop(), "thread group must be oop");
1178   return java_thread_group->bool_field(_destroyed_offset) != 0;
1179 }
1180 
1181 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1182   assert(java_thread_group->is_oop(), "thread group must be oop");
1183   return java_thread_group->bool_field(_daemon_offset) != 0;
1184 }
1185 
1186 bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) {
1187   assert(java_thread_group->is_oop(), "thread group must be oop");
1188   return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0;
1189 }
1190 
1191 void java_lang_ThreadGroup::compute_offsets() {
1192   assert(_parent_offset == 0, "offsets should be initialized only once");
1193 
1194   Klass* k = SystemDictionary::ThreadGroup_klass();
1195 
1196   compute_offset(_parent_offset,      k, vmSymbols::parent_name(),      vmSymbols::threadgroup_signature());
1197   compute_offset(_name_offset,        k, vmSymbols::name_name(),        vmSymbols::string_signature());
1198   compute_offset(_threads_offset,     k, vmSymbols::threads_name(),     vmSymbols::thread_array_signature());
1199   compute_offset(_groups_offset,      k, vmSymbols::groups_name(),      vmSymbols::threadgroup_array_signature());
1200   compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature());
1201   compute_offset(_destroyed_offset,   k, vmSymbols::destroyed_name(),   vmSymbols::bool_signature());
1202   compute_offset(_daemon_offset,      k, vmSymbols::daemon_name(),      vmSymbols::bool_signature());
1203   compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature());
1204   compute_offset(_nthreads_offset,    k, vmSymbols::nthreads_name(),    vmSymbols::int_signature());
1205   compute_offset(_ngroups_offset,     k, vmSymbols::ngroups_name(),     vmSymbols::int_signature());
1206 }
1207 
1208 oop java_lang_Throwable::unassigned_stacktrace() {
1209   InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Throwable_klass());
1210   address addr = ik->static_field_addr(static_unassigned_stacktrace_offset);
1211   if (UseCompressedOops) {
1212     return oopDesc::load_decode_heap_oop((narrowOop *)addr);
1213   } else {
1214     return oopDesc::load_decode_heap_oop((oop*)addr);
1215   }
1216 }
1217 
1218 oop java_lang_Throwable::backtrace(oop throwable) {
1219   return throwable->obj_field_acquire(backtrace_offset);
1220 }
1221 
1222 
1223 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1224   throwable->release_obj_field_put(backtrace_offset, value);
1225 }
1226 
1227 
1228 oop java_lang_Throwable::message(oop throwable) {
1229   return throwable->obj_field(detailMessage_offset);
1230 }
1231 
1232 
1233 oop java_lang_Throwable::message(Handle throwable) {
1234   return throwable->obj_field(detailMessage_offset);
1235 }
1236 
1237 
1238 // Return Symbol for detailed_message or NULL
1239 Symbol* java_lang_Throwable::detail_message(oop throwable) {
1240   PRESERVE_EXCEPTION_MARK;  // Keep original exception
1241   oop detailed_message = java_lang_Throwable::message(throwable);
1242   if (detailed_message != NULL) {
1243     return java_lang_String::as_symbol(detailed_message, THREAD);
1244   }
1245   return NULL;
1246 }
1247 
1248 void java_lang_Throwable::set_message(oop throwable, oop value) {
1249   throwable->obj_field_put(detailMessage_offset, value);
1250 }
1251 
1252 
1253 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
1254   throwable->obj_field_put(stackTrace_offset, st_element_array);
1255 }
1256 
1257 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1258   assert(JDK_Version::is_gte_jdk14x_version(), "should only be called in >= 1.4");
1259   set_stacktrace(throwable, NULL);
1260 }
1261 
1262 
1263 void java_lang_Throwable::print(oop throwable, outputStream* st) {
1264   ResourceMark rm;
1265   Klass* k = throwable->klass();
1266   assert(k != NULL, "just checking");
1267   st->print("%s", InstanceKlass::cast(k)->external_name());
1268   oop msg = message(throwable);
1269   if (msg != NULL) {
1270     st->print(": %s", java_lang_String::as_utf8_string(msg));
1271   }
1272 }
1273 
1274 
1275 void java_lang_Throwable::print(Handle throwable, outputStream* st) {
1276   ResourceMark rm;
1277   Klass* k = throwable->klass();
1278   assert(k != NULL, "just checking");
1279   st->print("%s", InstanceKlass::cast(k)->external_name());
1280   oop msg = message(throwable);
1281   if (msg != NULL) {
1282     st->print(": %s", java_lang_String::as_utf8_string(msg));
1283   }
1284 }
1285 
1286 // After this many redefines, the stack trace is unreliable.
1287 const int MAX_VERSION = USHRT_MAX;
1288 
1289 // Helper backtrace functions to store bci|version together.
1290 static inline int merge_bci_and_version(int bci, int version) {
1291   // only store u2 for version, checking for overflow.
1292   if (version > USHRT_MAX || version < 0) version = MAX_VERSION;
1293   assert((jushort)bci == bci, "bci should be short");
1294   return build_int_from_shorts(version, bci);
1295 }
1296 
1297 static inline int bci_at(unsigned int merged) {
1298   return extract_high_short_from_int(merged);
1299 }
1300 static inline int version_at(unsigned int merged) {
1301   return extract_low_short_from_int(merged);
1302 }
1303 
1304 static inline bool version_matches(Method* method, int version) {
1305   assert(version < MAX_VERSION, "version is too big");
1306   return method != NULL && (method->constants()->version() == version);
1307 }
1308 
1309 static inline int get_line_number(Method* method, int bci) {
1310   int line_number = 0;
1311   if (method->is_native()) {
1312     // Negative value different from -1 below, enabling Java code in
1313     // class java.lang.StackTraceElement to distinguish "native" from
1314     // "no LineNumberTable".  JDK tests for -2.
1315     line_number = -2;
1316   } else {
1317     // Returns -1 if no LineNumberTable, and otherwise actual line number
1318     line_number = method->line_number_from_bci(bci);
1319     if (line_number == -1 && ShowHiddenFrames) {
1320       line_number = bci + 1000000;
1321     }
1322   }
1323   return line_number;
1324 }
1325 
1326 // This class provides a simple wrapper over the internal structure of
1327 // exception backtrace to insulate users of the backtrace from needing
1328 // to know what it looks like.
1329 class BacktraceBuilder: public StackObj {
1330  private:
1331   Handle          _backtrace;
1332   objArrayOop     _head;
1333   typeArrayOop    _methods;
1334   typeArrayOop    _bcis;
1335   objArrayOop     _mirrors;
1336   typeArrayOop    _cprefs; // needed to insulate method name against redefinition
1337   int             _index;
1338   No_Safepoint_Verifier _nsv;
1339 
1340  public:
1341 
1342   enum {
1343     trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1344     trace_bcis_offset    = java_lang_Throwable::trace_bcis_offset,
1345     trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
1346     trace_cprefs_offset  = java_lang_Throwable::trace_cprefs_offset,
1347     trace_next_offset    = java_lang_Throwable::trace_next_offset,
1348     trace_size           = java_lang_Throwable::trace_size,
1349     trace_chunk_size     = java_lang_Throwable::trace_chunk_size
1350   };
1351 
1352   // get info out of chunks
1353   static typeArrayOop get_methods(objArrayHandle chunk) {
1354     typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
1355     assert(methods != NULL, "method array should be initialized in backtrace");
1356     return methods;
1357   }
1358   static typeArrayOop get_bcis(objArrayHandle chunk) {
1359     typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1360     assert(bcis != NULL, "bci array should be initialized in backtrace");
1361     return bcis;
1362   }
1363   static objArrayOop get_mirrors(objArrayHandle chunk) {
1364     objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
1365     assert(mirrors != NULL, "mirror array should be initialized in backtrace");
1366     return mirrors;
1367   }
1368   static typeArrayOop get_cprefs(objArrayHandle chunk) {
1369     typeArrayOop cprefs = typeArrayOop(chunk->obj_at(trace_cprefs_offset));
1370     assert(cprefs != NULL, "cprefs array should be initialized in backtrace");
1371     return cprefs;
1372   }
1373 
1374   // constructor for new backtrace
1375   BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL), _cprefs(NULL) {
1376     expand(CHECK);
1377     _backtrace = _head;
1378     _index = 0;
1379   }
1380 
1381   BacktraceBuilder(objArrayHandle backtrace) {
1382     _methods = get_methods(backtrace);
1383     _bcis = get_bcis(backtrace);
1384     _mirrors = get_mirrors(backtrace);
1385     _cprefs = get_cprefs(backtrace);
1386     assert(_methods->length() == _bcis->length() &&
1387            _methods->length() == _mirrors->length(),
1388            "method and source information arrays should match");
1389 
1390     // head is the preallocated backtrace
1391     _backtrace = _head = backtrace();
1392     _index = 0;
1393   }
1394 
1395   void expand(TRAPS) {
1396     objArrayHandle old_head(THREAD, _head);
1397     Pause_No_Safepoint_Verifier pnsv(&_nsv);
1398 
1399     objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
1400     objArrayHandle new_head(THREAD, head);
1401 
1402     typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1403     typeArrayHandle new_methods(THREAD, methods);
1404 
1405     typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
1406     typeArrayHandle new_bcis(THREAD, bcis);
1407 
1408     objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1409     objArrayHandle new_mirrors(THREAD, mirrors);
1410 
1411     typeArrayOop cprefs = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1412     typeArrayHandle new_cprefs(THREAD, cprefs);
1413 
1414     if (!old_head.is_null()) {
1415       old_head->obj_at_put(trace_next_offset, new_head());
1416     }
1417     new_head->obj_at_put(trace_methods_offset, new_methods());
1418     new_head->obj_at_put(trace_bcis_offset, new_bcis());
1419     new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
1420     new_head->obj_at_put(trace_cprefs_offset, new_cprefs());
1421 
1422     _head    = new_head();
1423     _methods = new_methods();
1424     _bcis = new_bcis();
1425     _mirrors = new_mirrors();
1426     _cprefs  = new_cprefs();
1427     _index = 0;
1428   }
1429 
1430   oop backtrace() {
1431     return _backtrace();
1432   }
1433 
1434   inline void push(Method* method, int bci, TRAPS) {
1435     // Smear the -1 bci to 0 since the array only holds unsigned
1436     // shorts.  The later line number lookup would just smear the -1
1437     // to a 0 even if it could be recorded.
1438     if (bci == SynchronizationEntryBCI) bci = 0;
1439 
1440     if (_index >= trace_chunk_size) {
1441       methodHandle mhandle(THREAD, method);
1442       expand(CHECK);
1443       method = mhandle();
1444     }
1445 
1446     _methods->short_at_put(_index, method->orig_method_idnum());
1447     _bcis->int_at_put(_index, merge_bci_and_version(bci, method->constants()->version()));
1448     _cprefs->short_at_put(_index, method->name_index());
1449 
1450     // We need to save the mirrors in the backtrace to keep the class
1451     // from being unloaded while we still have this stack trace.
1452     assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
1453     _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
1454     _index++;
1455   }
1456 
1457 };
1458 
1459 // Print stack trace element to resource allocated buffer
1460 char* java_lang_Throwable::print_stack_element_to_buffer(Handle mirror,
1461                                   int method_id, int version, int bci, int cpref) {
1462 
1463   // Get strings and string lengths
1464   InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1465   const char* klass_name  = holder->external_name();
1466   int buf_len = (int)strlen(klass_name);
1467 
1468   Method* method = holder->method_with_orig_idnum(method_id, version);
1469 
1470   // The method can be NULL if the requested class version is gone
1471   Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref);
1472   char* method_name = sym->as_C_string();
1473   buf_len += (int)strlen(method_name);
1474 
1475   // Use a specific ik version as a holder since the mirror might
1476   // refer to a version that is now obsolete and no longer accessible
1477   // via the previous versions list.
1478   holder = holder->get_klass_version(version);
1479   char* source_file_name = NULL;
1480   if (holder != NULL) {
1481     Symbol* source = holder->source_file_name();
1482     if (source != NULL) {
1483       source_file_name = source->as_C_string();
1484       buf_len += (int)strlen(source_file_name);
1485     }
1486   }
1487 
1488   // Allocate temporary buffer with extra space for formatting and line number
1489   char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
1490 
1491   // Print stack trace line in buffer
1492   sprintf(buf, "\tat %s.%s", klass_name, method_name);
1493 
1494   if (!version_matches(method, version)) {
1495     strcat(buf, "(Redefined)");
1496   } else {
1497     int line_number = get_line_number(method, bci);
1498     if (line_number == -2) {
1499       strcat(buf, "(Native Method)");
1500     } else {
1501       if (source_file_name != NULL && (line_number != -1)) {
1502         // Sourcename and linenumber
1503         sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number);
1504       } else if (source_file_name != NULL) {
1505         // Just sourcename
1506         sprintf(buf + (int)strlen(buf), "(%s)", source_file_name);
1507       } else {
1508         // Neither sourcename nor linenumber
1509         sprintf(buf + (int)strlen(buf), "(Unknown Source)");
1510       }
1511       nmethod* nm = method->code();
1512       if (WizardMode && nm != NULL) {
1513         sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
1514       }
1515     }
1516   }
1517 
1518   return buf;
1519 }
1520 
1521 void java_lang_Throwable::print_stack_element(outputStream *st, Handle mirror,
1522                                               int method_id, int version, int bci, int cpref) {
1523   ResourceMark rm;
1524   char* buf = print_stack_element_to_buffer(mirror, method_id, version, bci, cpref);
1525   st->print_cr("%s", buf);
1526 }
1527 
1528 void java_lang_Throwable::print_stack_element(outputStream *st, methodHandle method, int bci) {
1529   Handle mirror = method->method_holder()->java_mirror();
1530   int method_id = method->orig_method_idnum();
1531   int version = method->constants()->version();
1532   int cpref = method->name_index();
1533   print_stack_element(st, mirror, method_id, version, bci, cpref);
1534 }
1535 
1536 const char* java_lang_Throwable::no_stack_trace_message() {
1537   return "\t<<no stack trace available>>";
1538 }
1539 
1540 
1541 // Currently used only for exceptions occurring during startup
1542 void java_lang_Throwable::print_stack_trace(oop throwable, outputStream* st) {
1543   Thread *THREAD = Thread::current();
1544   Handle h_throwable(THREAD, throwable);
1545   while (h_throwable.not_null()) {
1546     objArrayHandle result (THREAD, objArrayOop(backtrace(h_throwable())));
1547     if (result.is_null()) {
1548       st->print_cr("%s", no_stack_trace_message());
1549       return;
1550     }
1551 
1552     while (result.not_null()) {
1553 
1554       // Get method id, bci, version and mirror from chunk
1555       typeArrayHandle methods (THREAD, BacktraceBuilder::get_methods(result));
1556       typeArrayHandle bcis (THREAD, BacktraceBuilder::get_bcis(result));
1557       objArrayHandle mirrors (THREAD, BacktraceBuilder::get_mirrors(result));
1558       typeArrayHandle cprefs (THREAD, BacktraceBuilder::get_cprefs(result));
1559 
1560       int length = methods()->length();
1561       for (int index = 0; index < length; index++) {
1562         Handle mirror(THREAD, mirrors->obj_at(index));
1563         // NULL mirror means end of stack trace
1564         if (mirror.is_null()) goto handle_cause;
1565         int method = methods->short_at(index);
1566         int version = version_at(bcis->int_at(index));
1567         int bci = bci_at(bcis->int_at(index));
1568         int cpref = cprefs->short_at(index);
1569         print_stack_element(st, mirror, method, version, bci, cpref);
1570       }
1571       result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset)));
1572     }
1573   handle_cause:
1574     {
1575       EXCEPTION_MARK;
1576       JavaValue cause(T_OBJECT);
1577       JavaCalls::call_virtual(&cause,
1578                               h_throwable,
1579                               KlassHandle(THREAD, h_throwable->klass()),
1580                               vmSymbols::getCause_name(),
1581                               vmSymbols::void_throwable_signature(),
1582                               THREAD);
1583       // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
1584       if (HAS_PENDING_EXCEPTION) {
1585         CLEAR_PENDING_EXCEPTION;
1586         h_throwable = Handle();
1587       } else {
1588         h_throwable = Handle(THREAD, (oop) cause.get_jobject());
1589         if (h_throwable.not_null()) {
1590           st->print("Caused by: ");
1591           print(h_throwable, st);
1592           st->cr();
1593         }
1594       }
1595     }
1596   }
1597 }
1598 
1599 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS) {
1600   if (!StackTraceInThrowable) return;
1601   ResourceMark rm(THREAD);
1602 
1603   // Start out by clearing the backtrace for this object, in case the VM
1604   // runs out of memory while allocating the stack trace
1605   set_backtrace(throwable(), NULL);
1606   if (JDK_Version::is_gte_jdk14x_version()) {
1607     // New since 1.4, clear lazily constructed Java level stacktrace if
1608     // refilling occurs
1609     // This is unnecessary in 1.7+ but harmless
1610     clear_stacktrace(throwable());
1611   }
1612 
1613   int max_depth = MaxJavaStackTraceDepth;
1614   JavaThread* thread = (JavaThread*)THREAD;
1615   BacktraceBuilder bt(CHECK);
1616 
1617   // If there is no Java frame just return the method that was being called
1618   // with bci 0
1619   if (!thread->has_last_Java_frame()) {
1620     if (max_depth >= 1 && method() != NULL) {
1621       bt.push(method(), 0, CHECK);
1622       set_backtrace(throwable(), bt.backtrace());
1623     }
1624     return;
1625   }
1626 
1627   // Instead of using vframe directly, this version of fill_in_stack_trace
1628   // basically handles everything by hand. This significantly improved the
1629   // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
1630   // See bug 6333838 for  more details.
1631   // The "ASSERT" here is to verify this method generates the exactly same stack
1632   // trace as utilizing vframe.
1633 #ifdef ASSERT
1634   vframeStream st(thread);
1635   methodHandle st_method(THREAD, st.method());
1636 #endif
1637   int total_count = 0;
1638   RegisterMap map(thread, false);
1639   int decode_offset = 0;
1640   nmethod* nm = NULL;
1641   bool skip_fillInStackTrace_check = false;
1642   bool skip_throwableInit_check = false;
1643   bool skip_hidden = !ShowHiddenFrames;
1644 
1645   for (frame fr = thread->last_frame(); max_depth != total_count;) {
1646     Method* method = NULL;
1647     int bci = 0;
1648 
1649     // Compiled java method case.
1650     if (decode_offset != 0) {
1651       DebugInfoReadStream stream(nm, decode_offset);
1652       decode_offset = stream.read_int();
1653       method = (Method*)nm->metadata_at(stream.read_int());
1654       bci = stream.read_bci();
1655     } else {
1656       if (fr.is_first_frame()) break;
1657       address pc = fr.pc();
1658       if (fr.is_interpreted_frame()) {
1659         intptr_t bcx = fr.interpreter_frame_bcx();
1660         method = fr.interpreter_frame_method();
1661         bci =  fr.is_bci(bcx) ? bcx : method->bci_from((address)bcx);
1662         fr = fr.sender(&map);
1663       } else {
1664         CodeBlob* cb = fr.cb();
1665         // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
1666         // but non nmethod
1667         fr = fr.sender(&map);
1668         if (cb == NULL || !cb->is_nmethod()) {
1669           continue;
1670         }
1671         nm = (nmethod*)cb;
1672         if (nm->method()->is_native()) {
1673           method = nm->method();
1674           bci = 0;
1675         } else {
1676           PcDesc* pd = nm->pc_desc_at(pc);
1677           decode_offset = pd->scope_decode_offset();
1678           // if decode_offset is not equal to 0, it will execute the
1679           // "compiled java method case" at the beginning of the loop.
1680           continue;
1681         }
1682       }
1683     }
1684 #ifdef ASSERT
1685     assert(st_method() == method && st.bci() == bci,
1686            "Wrong stack trace");
1687     st.next();
1688     // vframeStream::method isn't GC-safe so store off a copy
1689     // of the Method* in case we GC.
1690     if (!st.at_end()) {
1691       st_method = st.method();
1692     }
1693 #endif
1694 
1695     // the format of the stacktrace will be:
1696     // - 1 or more fillInStackTrace frames for the exception class (skipped)
1697     // - 0 or more <init> methods for the exception class (skipped)
1698     // - rest of the stack
1699 
1700     if (!skip_fillInStackTrace_check) {
1701       if ((method->name() == vmSymbols::fillInStackTrace_name() ||
1702            method->name() == vmSymbols::fillInStackTrace0_name()) &&
1703           throwable->is_a(method->method_holder())) {
1704         continue;
1705       }
1706       else {
1707         skip_fillInStackTrace_check = true; // gone past them all
1708       }
1709     }
1710     if (!skip_throwableInit_check) {
1711       assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
1712 
1713       // skip <init> methods of the exception class and superclasses
1714       // This is simlar to classic VM.
1715       if (method->name() == vmSymbols::object_initializer_name() &&
1716           throwable->is_a(method->method_holder())) {
1717         continue;
1718       } else {
1719         // there are none or we've seen them all - either way stop checking
1720         skip_throwableInit_check = true;
1721       }
1722     }
1723     if (method->is_hidden()) {
1724       if (skip_hidden)  continue;
1725     }
1726     bt.push(method, bci, CHECK);
1727     total_count++;
1728   }
1729 
1730   // Put completed stack trace into throwable object
1731   set_backtrace(throwable(), bt.backtrace());
1732 }
1733 
1734 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method) {
1735   // No-op if stack trace is disabled
1736   if (!StackTraceInThrowable) {
1737     return;
1738   }
1739 
1740   // Disable stack traces for some preallocated out of memory errors
1741   if (!Universe::should_fill_in_stack_trace(throwable)) {
1742     return;
1743   }
1744 
1745   PRESERVE_EXCEPTION_MARK;
1746 
1747   JavaThread* thread = JavaThread::active();
1748   fill_in_stack_trace(throwable, method, thread);
1749   // ignore exceptions thrown during stack trace filling
1750   CLEAR_PENDING_EXCEPTION;
1751 }
1752 
1753 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
1754   // Allocate stack trace - backtrace is created but not filled in
1755 
1756   // No-op if stack trace is disabled
1757   if (!StackTraceInThrowable) return;
1758   BacktraceBuilder bt(CHECK);   // creates a backtrace
1759   set_backtrace(throwable(), bt.backtrace());
1760 }
1761 
1762 
1763 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
1764   // Fill in stack trace into preallocated backtrace (no GC)
1765 
1766   // No-op if stack trace is disabled
1767   if (!StackTraceInThrowable) return;
1768 
1769   assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
1770 
1771   JavaThread* THREAD = JavaThread::current();
1772 
1773   objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
1774   assert(backtrace.not_null(), "backtrace should have been preallocated");
1775 
1776   ResourceMark rm(THREAD);
1777   vframeStream st(THREAD);
1778 
1779   BacktraceBuilder bt(backtrace);
1780 
1781   // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
1782   // methods as preallocated errors aren't created by "java" code.
1783 
1784   // fill in as much stack trace as possible
1785   typeArrayOop methods = BacktraceBuilder::get_methods(backtrace);
1786   int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth);
1787   int chunk_count = 0;
1788 
1789   for (;!st.at_end(); st.next()) {
1790     bt.push(st.method(), st.bci(), CHECK);
1791     chunk_count++;
1792 
1793     // Bail-out for deep stacks
1794     if (chunk_count >= max_chunks) break;
1795   }
1796 
1797   // For Java 7+ we support the Throwable immutability protocol defined for Java 7. This support
1798   // was missing in 7u0 so in 7u0 there is a workaround in the Throwable class. That workaround
1799   // can be removed in a JDK using this JVM version
1800   if (JDK_Version::is_gte_jdk17x_version()) {
1801       java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
1802       assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
1803   }
1804 }
1805 
1806 
1807 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) {
1808   if (throwable == NULL) {
1809     THROW_0(vmSymbols::java_lang_NullPointerException());
1810   }
1811   objArrayOop chunk = objArrayOop(backtrace(throwable));
1812   int depth = 0;
1813   if (chunk != NULL) {
1814     // Iterate over chunks and count full ones
1815     while (true) {
1816       objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset));
1817       if (next == NULL) break;
1818       depth += trace_chunk_size;
1819       chunk = next;
1820     }
1821     assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check");
1822     // Count element in remaining partial chunk.  NULL value for mirror
1823     // marks the end of the stack trace elements that are saved.
1824     objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk);
1825     assert(mirrors != NULL, "sanity check");
1826     for (int i = 0; i < mirrors->length(); i++) {
1827       if (mirrors->obj_at(i) == NULL) break;
1828       depth++;
1829     }
1830   }
1831   return depth;
1832 }
1833 
1834 
1835 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) {
1836   if (throwable == NULL) {
1837     THROW_0(vmSymbols::java_lang_NullPointerException());
1838   }
1839   if (index < 0) {
1840     THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1841   }
1842   // Compute how many chunks to skip and index into actual chunk
1843   objArrayOop chunk = objArrayOop(backtrace(throwable));
1844   int skip_chunks = index / trace_chunk_size;
1845   int chunk_index = index % trace_chunk_size;
1846   while (chunk != NULL && skip_chunks > 0) {
1847     chunk = objArrayOop(chunk->obj_at(trace_next_offset));
1848         skip_chunks--;
1849   }
1850   if (chunk == NULL) {
1851     THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1852   }
1853   // Get method id, bci, version, mirror and cpref from chunk
1854   typeArrayOop methods = BacktraceBuilder::get_methods(chunk);
1855   typeArrayOop bcis = BacktraceBuilder::get_bcis(chunk);
1856   objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk);
1857   typeArrayOop cprefs = BacktraceBuilder::get_cprefs(chunk);
1858 
1859   assert(methods != NULL && bcis != NULL && mirrors != NULL, "sanity check");
1860 
1861   int method = methods->short_at(chunk_index);
1862   int version = version_at(bcis->int_at(chunk_index));
1863   int bci = bci_at(bcis->int_at(chunk_index));
1864   int cpref = cprefs->short_at(chunk_index);
1865   Handle mirror(THREAD, mirrors->obj_at(chunk_index));
1866 
1867   // Chunk can be partial full
1868   if (mirror.is_null()) {
1869     THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1870   }
1871   oop element = java_lang_StackTraceElement::create(mirror, method, version, bci, cpref, CHECK_0);
1872   return element;
1873 }
1874 
1875 oop java_lang_StackTraceElement::create(Handle mirror, int method_id,
1876                                         int version, int bci, int cpref, TRAPS) {
1877   // Allocate java.lang.StackTraceElement instance
1878   Klass* k = SystemDictionary::StackTraceElement_klass();
1879   assert(k != NULL, "must be loaded in 1.4+");
1880   instanceKlassHandle ik (THREAD, k);
1881   if (ik->should_be_initialized()) {
1882     ik->initialize(CHECK_0);
1883   }
1884 
1885   Handle element = ik->allocate_instance_handle(CHECK_0);
1886   // Fill in class name
1887   ResourceMark rm(THREAD);
1888   InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1889   const char* str = holder->external_name();
1890   oop classname = StringTable::intern((char*) str, CHECK_0);
1891   java_lang_StackTraceElement::set_declaringClass(element(), classname);
1892 
1893   Method* method = holder->method_with_orig_idnum(method_id, version);
1894 
1895   // The method can be NULL if the requested class version is gone
1896   Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref);
1897 
1898   // Fill in method name
1899   oop methodname = StringTable::intern(sym, CHECK_0);
1900   java_lang_StackTraceElement::set_methodName(element(), methodname);
1901 
1902   if (!version_matches(method, version)) {
1903     // The method was redefined, accurate line number information isn't available
1904     java_lang_StackTraceElement::set_fileName(element(), NULL);
1905     java_lang_StackTraceElement::set_lineNumber(element(), -1);
1906   } else {
1907     // Fill in source file name and line number.
1908     // Use a specific ik version as a holder since the mirror might
1909     // refer to a version that is now obsolete and no longer accessible
1910     // via the previous versions list.
1911     holder = holder->get_klass_version(version);
1912     assert(holder != NULL, "sanity check");
1913     Symbol* source = holder->source_file_name();
1914     if (ShowHiddenFrames && source == NULL)
1915       source = vmSymbols::unknown_class_name();
1916     oop filename = StringTable::intern(source, CHECK_0);
1917     java_lang_StackTraceElement::set_fileName(element(), filename);
1918 
1919     int line_number = get_line_number(method, bci);
1920     java_lang_StackTraceElement::set_lineNumber(element(), line_number);
1921   }
1922   return element();
1923 }
1924 
1925 oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) {
1926   Handle mirror (THREAD, method->method_holder()->java_mirror());
1927   int method_id = method->orig_method_idnum();
1928   int cpref = method->name_index();
1929   return create(mirror, method_id, method->constants()->version(), bci, cpref, THREAD);
1930 }
1931 
1932 void java_lang_reflect_AccessibleObject::compute_offsets() {
1933   Klass* k = SystemDictionary::reflect_AccessibleObject_klass();
1934   compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature());
1935 }
1936 
1937 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
1938   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1939   return (jboolean) reflect->bool_field(override_offset);
1940 }
1941 
1942 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
1943   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1944   reflect->bool_field_put(override_offset, (int) value);
1945 }
1946 
1947 void java_lang_reflect_Method::compute_offsets() {
1948   Klass* k = SystemDictionary::reflect_Method_klass();
1949   compute_offset(clazz_offset,          k, vmSymbols::clazz_name(),          vmSymbols::class_signature());
1950   compute_offset(name_offset,           k, vmSymbols::name_name(),           vmSymbols::string_signature());
1951   compute_offset(returnType_offset,     k, vmSymbols::returnType_name(),     vmSymbols::class_signature());
1952   compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
1953   compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
1954   compute_offset(slot_offset,           k, vmSymbols::slot_name(),           vmSymbols::int_signature());
1955   compute_offset(modifiers_offset,      k, vmSymbols::modifiers_name(),      vmSymbols::int_signature());
1956   // The generic signature and annotations fields are only present in 1.5
1957   signature_offset = -1;
1958   annotations_offset = -1;
1959   parameter_annotations_offset = -1;
1960   annotation_default_offset = -1;
1961   type_annotations_offset = -1;
1962   compute_optional_offset(signature_offset,             k, vmSymbols::signature_name(),             vmSymbols::string_signature());
1963   compute_optional_offset(annotations_offset,           k, vmSymbols::annotations_name(),           vmSymbols::byte_array_signature());
1964   compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
1965   compute_optional_offset(annotation_default_offset,    k, vmSymbols::annotation_default_name(),    vmSymbols::byte_array_signature());
1966   compute_optional_offset(type_annotations_offset,      k, vmSymbols::type_annotations_name(),      vmSymbols::byte_array_signature());
1967 }
1968 
1969 Handle java_lang_reflect_Method::create(TRAPS) {
1970   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1971   Klass* klass = SystemDictionary::reflect_Method_klass();
1972   // This class is eagerly initialized during VM initialization, since we keep a refence
1973   // to one of the methods
1974   assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
1975   return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
1976 }
1977 
1978 oop java_lang_reflect_Method::clazz(oop reflect) {
1979   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1980   return reflect->obj_field(clazz_offset);
1981 }
1982 
1983 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
1984   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1985    reflect->obj_field_put(clazz_offset, value);
1986 }
1987 
1988 int java_lang_reflect_Method::slot(oop reflect) {
1989   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1990   return reflect->int_field(slot_offset);
1991 }
1992 
1993 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
1994   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1995   reflect->int_field_put(slot_offset, value);
1996 }
1997 
1998 oop java_lang_reflect_Method::name(oop method) {
1999   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2000   return method->obj_field(name_offset);
2001 }
2002 
2003 void java_lang_reflect_Method::set_name(oop method, oop value) {
2004   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2005   method->obj_field_put(name_offset, value);
2006 }
2007 
2008 oop java_lang_reflect_Method::return_type(oop method) {
2009   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2010   return method->obj_field(returnType_offset);
2011 }
2012 
2013 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
2014   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2015   method->obj_field_put(returnType_offset, value);
2016 }
2017 
2018 oop java_lang_reflect_Method::parameter_types(oop method) {
2019   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2020   return method->obj_field(parameterTypes_offset);
2021 }
2022 
2023 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
2024   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2025   method->obj_field_put(parameterTypes_offset, value);
2026 }
2027 
2028 oop java_lang_reflect_Method::exception_types(oop method) {
2029   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2030   return method->obj_field(exceptionTypes_offset);
2031 }
2032 
2033 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
2034   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2035   method->obj_field_put(exceptionTypes_offset, value);
2036 }
2037 
2038 int java_lang_reflect_Method::modifiers(oop method) {
2039   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2040   return method->int_field(modifiers_offset);
2041 }
2042 
2043 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
2044   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2045   method->int_field_put(modifiers_offset, value);
2046 }
2047 
2048 bool java_lang_reflect_Method::has_signature_field() {
2049   return (signature_offset >= 0);
2050 }
2051 
2052 oop java_lang_reflect_Method::signature(oop method) {
2053   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2054   assert(has_signature_field(), "signature field must be present");
2055   return method->obj_field(signature_offset);
2056 }
2057 
2058 void java_lang_reflect_Method::set_signature(oop method, oop value) {
2059   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2060   assert(has_signature_field(), "signature field must be present");
2061   method->obj_field_put(signature_offset, value);
2062 }
2063 
2064 bool java_lang_reflect_Method::has_annotations_field() {
2065   return (annotations_offset >= 0);
2066 }
2067 
2068 oop java_lang_reflect_Method::annotations(oop method) {
2069   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2070   assert(has_annotations_field(), "annotations field must be present");
2071   return method->obj_field(annotations_offset);
2072 }
2073 
2074 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
2075   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2076   assert(has_annotations_field(), "annotations field must be present");
2077   method->obj_field_put(annotations_offset, value);
2078 }
2079 
2080 bool java_lang_reflect_Method::has_parameter_annotations_field() {
2081   return (parameter_annotations_offset >= 0);
2082 }
2083 
2084 oop java_lang_reflect_Method::parameter_annotations(oop method) {
2085   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2086   assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2087   return method->obj_field(parameter_annotations_offset);
2088 }
2089 
2090 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
2091   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2092   assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2093   method->obj_field_put(parameter_annotations_offset, value);
2094 }
2095 
2096 bool java_lang_reflect_Method::has_annotation_default_field() {
2097   return (annotation_default_offset >= 0);
2098 }
2099 
2100 oop java_lang_reflect_Method::annotation_default(oop method) {
2101   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2102   assert(has_annotation_default_field(), "annotation default field must be present");
2103   return method->obj_field(annotation_default_offset);
2104 }
2105 
2106 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
2107   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2108   assert(has_annotation_default_field(), "annotation default field must be present");
2109   method->obj_field_put(annotation_default_offset, value);
2110 }
2111 
2112 bool java_lang_reflect_Method::has_type_annotations_field() {
2113   return (type_annotations_offset >= 0);
2114 }
2115 
2116 oop java_lang_reflect_Method::type_annotations(oop method) {
2117   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2118   assert(has_type_annotations_field(), "type_annotations field must be present");
2119   return method->obj_field(type_annotations_offset);
2120 }
2121 
2122 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) {
2123   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2124   assert(has_type_annotations_field(), "type_annotations field must be present");
2125   method->obj_field_put(type_annotations_offset, value);
2126 }
2127 
2128 void java_lang_reflect_Constructor::compute_offsets() {
2129   Klass* k = SystemDictionary::reflect_Constructor_klass();
2130   compute_offset(clazz_offset,          k, vmSymbols::clazz_name(),          vmSymbols::class_signature());
2131   compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
2132   compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
2133   compute_offset(slot_offset,           k, vmSymbols::slot_name(),           vmSymbols::int_signature());
2134   compute_offset(modifiers_offset,      k, vmSymbols::modifiers_name(),      vmSymbols::int_signature());
2135   // The generic signature and annotations fields are only present in 1.5
2136   signature_offset = -1;
2137   annotations_offset = -1;
2138   parameter_annotations_offset = -1;
2139   type_annotations_offset = -1;
2140   compute_optional_offset(signature_offset,             k, vmSymbols::signature_name(),             vmSymbols::string_signature());
2141   compute_optional_offset(annotations_offset,           k, vmSymbols::annotations_name(),           vmSymbols::byte_array_signature());
2142   compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
2143   compute_optional_offset(type_annotations_offset,      k, vmSymbols::type_annotations_name(),      vmSymbols::byte_array_signature());
2144 }
2145 
2146 Handle java_lang_reflect_Constructor::create(TRAPS) {
2147   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2148   Symbol* name = vmSymbols::java_lang_reflect_Constructor();
2149   Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2150   instanceKlassHandle klass (THREAD, k);
2151   // Ensure it is initialized
2152   klass->initialize(CHECK_NH);
2153   return klass->allocate_instance_handle(CHECK_NH);
2154 }
2155 
2156 oop java_lang_reflect_Constructor::clazz(oop reflect) {
2157   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2158   return reflect->obj_field(clazz_offset);
2159 }
2160 
2161 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
2162   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2163    reflect->obj_field_put(clazz_offset, value);
2164 }
2165 
2166 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
2167   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2168   return constructor->obj_field(parameterTypes_offset);
2169 }
2170 
2171 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
2172   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2173   constructor->obj_field_put(parameterTypes_offset, value);
2174 }
2175 
2176 oop java_lang_reflect_Constructor::exception_types(oop constructor) {
2177   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2178   return constructor->obj_field(exceptionTypes_offset);
2179 }
2180 
2181 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
2182   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2183   constructor->obj_field_put(exceptionTypes_offset, value);
2184 }
2185 
2186 int java_lang_reflect_Constructor::slot(oop reflect) {
2187   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2188   return reflect->int_field(slot_offset);
2189 }
2190 
2191 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
2192   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2193   reflect->int_field_put(slot_offset, value);
2194 }
2195 
2196 int java_lang_reflect_Constructor::modifiers(oop constructor) {
2197   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2198   return constructor->int_field(modifiers_offset);
2199 }
2200 
2201 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
2202   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2203   constructor->int_field_put(modifiers_offset, value);
2204 }
2205 
2206 bool java_lang_reflect_Constructor::has_signature_field() {
2207   return (signature_offset >= 0);
2208 }
2209 
2210 oop java_lang_reflect_Constructor::signature(oop constructor) {
2211   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2212   assert(has_signature_field(), "signature field must be present");
2213   return constructor->obj_field(signature_offset);
2214 }
2215 
2216 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
2217   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2218   assert(has_signature_field(), "signature field must be present");
2219   constructor->obj_field_put(signature_offset, value);
2220 }
2221 
2222 bool java_lang_reflect_Constructor::has_annotations_field() {
2223   return (annotations_offset >= 0);
2224 }
2225 
2226 oop java_lang_reflect_Constructor::annotations(oop constructor) {
2227   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2228   assert(has_annotations_field(), "annotations field must be present");
2229   return constructor->obj_field(annotations_offset);
2230 }
2231 
2232 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
2233   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2234   assert(has_annotations_field(), "annotations field must be present");
2235   constructor->obj_field_put(annotations_offset, value);
2236 }
2237 
2238 bool java_lang_reflect_Constructor::has_parameter_annotations_field() {
2239   return (parameter_annotations_offset >= 0);
2240 }
2241 
2242 oop java_lang_reflect_Constructor::parameter_annotations(oop method) {
2243   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2244   assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2245   return method->obj_field(parameter_annotations_offset);
2246 }
2247 
2248 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
2249   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2250   assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2251   method->obj_field_put(parameter_annotations_offset, value);
2252 }
2253 
2254 bool java_lang_reflect_Constructor::has_type_annotations_field() {
2255   return (type_annotations_offset >= 0);
2256 }
2257 
2258 oop java_lang_reflect_Constructor::type_annotations(oop constructor) {
2259   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2260   assert(has_type_annotations_field(), "type_annotations field must be present");
2261   return constructor->obj_field(type_annotations_offset);
2262 }
2263 
2264 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) {
2265   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2266   assert(has_type_annotations_field(), "type_annotations field must be present");
2267   constructor->obj_field_put(type_annotations_offset, value);
2268 }
2269 
2270 void java_lang_reflect_Field::compute_offsets() {
2271   Klass* k = SystemDictionary::reflect_Field_klass();
2272   compute_offset(clazz_offset,     k, vmSymbols::clazz_name(),     vmSymbols::class_signature());
2273   compute_offset(name_offset,      k, vmSymbols::name_name(),      vmSymbols::string_signature());
2274   compute_offset(type_offset,      k, vmSymbols::type_name(),      vmSymbols::class_signature());
2275   compute_offset(slot_offset,      k, vmSymbols::slot_name(),      vmSymbols::int_signature());
2276   compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2277   // The generic signature and annotations fields are only present in 1.5
2278   signature_offset = -1;
2279   annotations_offset = -1;
2280   type_annotations_offset = -1;
2281   compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2282   compute_optional_offset(annotations_offset,  k, vmSymbols::annotations_name(),  vmSymbols::byte_array_signature());
2283   compute_optional_offset(type_annotations_offset,  k, vmSymbols::type_annotations_name(),  vmSymbols::byte_array_signature());
2284 }
2285 
2286 Handle java_lang_reflect_Field::create(TRAPS) {
2287   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2288   Symbol* name = vmSymbols::java_lang_reflect_Field();
2289   Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2290   instanceKlassHandle klass (THREAD, k);
2291   // Ensure it is initialized
2292   klass->initialize(CHECK_NH);
2293   return klass->allocate_instance_handle(CHECK_NH);
2294 }
2295 
2296 oop java_lang_reflect_Field::clazz(oop reflect) {
2297   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2298   return reflect->obj_field(clazz_offset);
2299 }
2300 
2301 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
2302   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2303    reflect->obj_field_put(clazz_offset, value);
2304 }
2305 
2306 oop java_lang_reflect_Field::name(oop field) {
2307   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2308   return field->obj_field(name_offset);
2309 }
2310 
2311 void java_lang_reflect_Field::set_name(oop field, oop value) {
2312   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2313   field->obj_field_put(name_offset, value);
2314 }
2315 
2316 oop java_lang_reflect_Field::type(oop field) {
2317   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2318   return field->obj_field(type_offset);
2319 }
2320 
2321 void java_lang_reflect_Field::set_type(oop field, oop value) {
2322   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2323   field->obj_field_put(type_offset, value);
2324 }
2325 
2326 int java_lang_reflect_Field::slot(oop reflect) {
2327   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2328   return reflect->int_field(slot_offset);
2329 }
2330 
2331 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
2332   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2333   reflect->int_field_put(slot_offset, value);
2334 }
2335 
2336 int java_lang_reflect_Field::modifiers(oop field) {
2337   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2338   return field->int_field(modifiers_offset);
2339 }
2340 
2341 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
2342   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2343   field->int_field_put(modifiers_offset, value);
2344 }
2345 
2346 bool java_lang_reflect_Field::has_signature_field() {
2347   return (signature_offset >= 0);
2348 }
2349 
2350 oop java_lang_reflect_Field::signature(oop field) {
2351   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2352   assert(has_signature_field(), "signature field must be present");
2353   return field->obj_field(signature_offset);
2354 }
2355 
2356 void java_lang_reflect_Field::set_signature(oop field, oop value) {
2357   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2358   assert(has_signature_field(), "signature field must be present");
2359   field->obj_field_put(signature_offset, value);
2360 }
2361 
2362 bool java_lang_reflect_Field::has_annotations_field() {
2363   return (annotations_offset >= 0);
2364 }
2365 
2366 oop java_lang_reflect_Field::annotations(oop field) {
2367   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2368   assert(has_annotations_field(), "annotations field must be present");
2369   return field->obj_field(annotations_offset);
2370 }
2371 
2372 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
2373   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2374   assert(has_annotations_field(), "annotations field must be present");
2375   field->obj_field_put(annotations_offset, value);
2376 }
2377 
2378 bool java_lang_reflect_Field::has_type_annotations_field() {
2379   return (type_annotations_offset >= 0);
2380 }
2381 
2382 oop java_lang_reflect_Field::type_annotations(oop field) {
2383   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2384   assert(has_type_annotations_field(), "type_annotations field must be present");
2385   return field->obj_field(type_annotations_offset);
2386 }
2387 
2388 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) {
2389   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2390   assert(has_type_annotations_field(), "type_annotations field must be present");
2391   field->obj_field_put(type_annotations_offset, value);
2392 }
2393 
2394 void sun_reflect_ConstantPool::compute_offsets() {
2395   Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2396   // This null test can be removed post beta
2397   if (k != NULL) {
2398     // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
2399     compute_offset(_oop_offset, k, vmSymbols::ConstantPool_name(), vmSymbols::object_signature());
2400   }
2401 }
2402 
2403 void java_lang_reflect_Parameter::compute_offsets() {
2404   Klass* k = SystemDictionary::reflect_Parameter_klass();
2405   if(NULL != k) {
2406     compute_offset(name_offset,        k, vmSymbols::name_name(),        vmSymbols::string_signature());
2407     compute_offset(modifiers_offset,   k, vmSymbols::modifiers_name(),   vmSymbols::int_signature());
2408     compute_offset(index_offset,       k, vmSymbols::index_name(),       vmSymbols::int_signature());
2409     compute_offset(executable_offset,  k, vmSymbols::executable_name(),  vmSymbols::executable_signature());
2410   }
2411 }
2412 
2413 Handle java_lang_reflect_Parameter::create(TRAPS) {
2414   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2415   Symbol* name = vmSymbols::java_lang_reflect_Parameter();
2416   Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2417   instanceKlassHandle klass (THREAD, k);
2418   // Ensure it is initialized
2419   klass->initialize(CHECK_NH);
2420   return klass->allocate_instance_handle(CHECK_NH);
2421 }
2422 
2423 oop java_lang_reflect_Parameter::name(oop param) {
2424   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2425   return param->obj_field(name_offset);
2426 }
2427 
2428 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
2429   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2430   param->obj_field_put(name_offset, value);
2431 }
2432 
2433 int java_lang_reflect_Parameter::modifiers(oop param) {
2434   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2435   return param->int_field(modifiers_offset);
2436 }
2437 
2438 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
2439   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2440   param->int_field_put(modifiers_offset, value);
2441 }
2442 
2443 int java_lang_reflect_Parameter::index(oop param) {
2444   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2445   return param->int_field(index_offset);
2446 }
2447 
2448 void java_lang_reflect_Parameter::set_index(oop param, int value) {
2449   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2450   param->int_field_put(index_offset, value);
2451 }
2452 
2453 oop java_lang_reflect_Parameter::executable(oop param) {
2454   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2455   return param->obj_field(executable_offset);
2456 }
2457 
2458 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
2459   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2460   param->obj_field_put(executable_offset, value);
2461 }
2462 
2463 
2464 Handle sun_reflect_ConstantPool::create(TRAPS) {
2465   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2466   Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2467   instanceKlassHandle klass (THREAD, k);
2468   // Ensure it is initialized
2469   klass->initialize(CHECK_NH);
2470   return klass->allocate_instance_handle(CHECK_NH);
2471 }
2472 
2473 
2474 void sun_reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
2475   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2476   oop mirror = value->pool_holder()->java_mirror();
2477   // Save the mirror to get back the constant pool.
2478   reflect->obj_field_put(_oop_offset, mirror);
2479 }
2480 
2481 ConstantPool* sun_reflect_ConstantPool::get_cp(oop reflect) {
2482   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2483 
2484   oop mirror = reflect->obj_field(_oop_offset);
2485   Klass* k = java_lang_Class::as_Klass(mirror);
2486   assert(k->oop_is_instance(), "Must be");
2487 
2488   // Get the constant pool back from the klass.  Since class redefinition
2489   // merges the new constant pool into the old, this is essentially the
2490   // same constant pool as the original.  If constant pool merging is
2491   // no longer done in the future, this will have to change to save
2492   // the original.
2493   return InstanceKlass::cast(k)->constants();
2494 }
2495 
2496 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
2497   Klass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
2498   // This null test can be removed post beta
2499   if (k != NULL) {
2500     compute_offset(_base_offset, k,
2501                    vmSymbols::base_name(), vmSymbols::object_signature());
2502   }
2503 }
2504 
2505 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
2506   Klass* k = SystemDictionary::box_klass(type);
2507   if (k == NULL)  return NULL;
2508   instanceKlassHandle h (THREAD, k);
2509   if (!h->is_initialized())  h->initialize(CHECK_0);
2510   return h->allocate_instance(THREAD);
2511 }
2512 
2513 
2514 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
2515   oop box = initialize_and_allocate(type, CHECK_0);
2516   if (box == NULL)  return NULL;
2517   switch (type) {
2518     case T_BOOLEAN:
2519       box->bool_field_put(value_offset, value->z);
2520       break;
2521     case T_CHAR:
2522       box->char_field_put(value_offset, value->c);
2523       break;
2524     case T_FLOAT:
2525       box->float_field_put(value_offset, value->f);
2526       break;
2527     case T_DOUBLE:
2528       box->double_field_put(long_value_offset, value->d);
2529       break;
2530     case T_BYTE:
2531       box->byte_field_put(value_offset, value->b);
2532       break;
2533     case T_SHORT:
2534       box->short_field_put(value_offset, value->s);
2535       break;
2536     case T_INT:
2537       box->int_field_put(value_offset, value->i);
2538       break;
2539     case T_LONG:
2540       box->long_field_put(long_value_offset, value->j);
2541       break;
2542     default:
2543       return NULL;
2544   }
2545   return box;
2546 }
2547 
2548 
2549 BasicType java_lang_boxing_object::basic_type(oop box) {
2550   if (box == NULL)  return T_ILLEGAL;
2551   BasicType type = SystemDictionary::box_klass_type(box->klass());
2552   if (type == T_OBJECT)         // 'unknown' value returned by SD::bkt
2553     return T_ILLEGAL;
2554   return type;
2555 }
2556 
2557 
2558 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
2559   BasicType type = SystemDictionary::box_klass_type(box->klass());
2560   switch (type) {
2561   case T_BOOLEAN:
2562     value->z = box->bool_field(value_offset);
2563     break;
2564   case T_CHAR:
2565     value->c = box->char_field(value_offset);
2566     break;
2567   case T_FLOAT:
2568     value->f = box->float_field(value_offset);
2569     break;
2570   case T_DOUBLE:
2571     value->d = box->double_field(long_value_offset);
2572     break;
2573   case T_BYTE:
2574     value->b = box->byte_field(value_offset);
2575     break;
2576   case T_SHORT:
2577     value->s = box->short_field(value_offset);
2578     break;
2579   case T_INT:
2580     value->i = box->int_field(value_offset);
2581     break;
2582   case T_LONG:
2583     value->j = box->long_field(long_value_offset);
2584     break;
2585   default:
2586     return T_ILLEGAL;
2587   } // end switch
2588   return type;
2589 }
2590 
2591 
2592 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
2593   BasicType type = SystemDictionary::box_klass_type(box->klass());
2594   switch (type) {
2595   case T_BOOLEAN:
2596     box->bool_field_put(value_offset, value->z);
2597     break;
2598   case T_CHAR:
2599     box->char_field_put(value_offset, value->c);
2600     break;
2601   case T_FLOAT:
2602     box->float_field_put(value_offset, value->f);
2603     break;
2604   case T_DOUBLE:
2605     box->double_field_put(long_value_offset, value->d);
2606     break;
2607   case T_BYTE:
2608     box->byte_field_put(value_offset, value->b);
2609     break;
2610   case T_SHORT:
2611     box->short_field_put(value_offset, value->s);
2612     break;
2613   case T_INT:
2614     box->int_field_put(value_offset, value->i);
2615     break;
2616   case T_LONG:
2617     box->long_field_put(long_value_offset, value->j);
2618     break;
2619   default:
2620     return T_ILLEGAL;
2621   } // end switch
2622   return type;
2623 }
2624 
2625 
2626 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
2627   switch (type) {
2628   case T_BOOLEAN:   st->print("%s", value->z ? "true" : "false");   break;
2629   case T_CHAR:      st->print("%d", value->c);                      break;
2630   case T_BYTE:      st->print("%d", value->b);                      break;
2631   case T_SHORT:     st->print("%d", value->s);                      break;
2632   case T_INT:       st->print("%d", value->i);                      break;
2633   case T_LONG:      st->print(INT64_FORMAT, value->j);              break;
2634   case T_FLOAT:     st->print("%f", value->f);                      break;
2635   case T_DOUBLE:    st->print("%lf", value->d);                     break;
2636   default:          st->print("type %d?", type);                    break;
2637   }
2638 }
2639 
2640 
2641 // Support for java_lang_ref_Reference
2642 HeapWord *java_lang_ref_Reference::pending_list_lock_addr() {
2643   InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2644   address addr = ik->static_field_addr(static_lock_offset);
2645   return (HeapWord*) addr;
2646 }
2647 
2648 oop java_lang_ref_Reference::pending_list_lock() {
2649   InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2650   address addr = ik->static_field_addr(static_lock_offset);
2651   if (UseCompressedOops) {
2652     return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2653   } else {
2654     return oopDesc::load_decode_heap_oop((oop*)addr);
2655   }
2656 }
2657 
2658 HeapWord *java_lang_ref_Reference::pending_list_addr() {
2659   InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2660   address addr = ik->static_field_addr(static_pending_offset);
2661   // XXX This might not be HeapWord aligned, almost rather be char *.
2662   return (HeapWord*)addr;
2663 }
2664 
2665 oop java_lang_ref_Reference::pending_list() {
2666   char *addr = (char *)pending_list_addr();
2667   if (UseCompressedOops) {
2668     return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2669   } else {
2670     return oopDesc::load_decode_heap_oop((oop*)addr);
2671   }
2672 }
2673 
2674 
2675 // Support for java_lang_ref_SoftReference
2676 
2677 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
2678   return ref->long_field(timestamp_offset);
2679 }
2680 
2681 jlong java_lang_ref_SoftReference::clock() {
2682   InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass());
2683   jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2684   return *offset;
2685 }
2686 
2687 void java_lang_ref_SoftReference::set_clock(jlong value) {
2688   InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass());
2689   jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2690   *offset = value;
2691 }
2692 
2693 // Support for java_lang_ref_ReferenceQueue
2694 
2695 oop java_lang_ref_ReferenceQueue::NULL_queue() {
2696   InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::ReferenceQueue_klass());
2697   oop mirror = ik->java_mirror();
2698   return mirror->obj_field(static_NULL_queue_offset);
2699 }
2700 
2701 oop java_lang_ref_ReferenceQueue::ENQUEUED_queue() {
2702   InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::ReferenceQueue_klass());
2703   oop mirror = ik->java_mirror();
2704   return mirror->obj_field(static_ENQUEUED_queue_offset);
2705 }
2706 
2707 void java_lang_ref_ReferenceQueue::compute_offsets() {
2708   Klass* k = SystemDictionary::ReferenceQueue_klass();
2709   compute_offset(static_NULL_queue_offset,
2710                  k,
2711                  vmSymbols::referencequeue_null_name(),
2712                  vmSymbols::referencequeue_signature());
2713   compute_offset(static_ENQUEUED_queue_offset,
2714                  k,
2715                  vmSymbols::referencequeue_enqueued_name(),
2716                  vmSymbols::referencequeue_signature());
2717 }
2718 
2719 // Support for java_lang_invoke_DirectMethodHandle
2720 
2721 int java_lang_invoke_DirectMethodHandle::_member_offset;
2722 
2723 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
2724   oop member_name = NULL;
2725   bool is_dmh = dmh->is_oop() && java_lang_invoke_DirectMethodHandle::is_instance(dmh);
2726   assert(is_dmh, "a DirectMethodHandle oop is expected");
2727   if (is_dmh) {
2728     member_name = dmh->obj_field(member_offset_in_bytes());
2729   }
2730   return member_name;
2731 }
2732 
2733 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
2734   Klass* klass_oop = SystemDictionary::DirectMethodHandle_klass();
2735   if (klass_oop != NULL && EnableInvokeDynamic) {
2736     compute_offset(_member_offset, klass_oop, vmSymbols::member_name(), vmSymbols::java_lang_invoke_MemberName_signature());
2737   }
2738 }
2739 
2740 // Support for java_lang_invoke_MethodHandle
2741 
2742 int java_lang_invoke_MethodHandle::_type_offset;
2743 int java_lang_invoke_MethodHandle::_form_offset;
2744 
2745 int java_lang_invoke_MemberName::_clazz_offset;
2746 int java_lang_invoke_MemberName::_name_offset;
2747 int java_lang_invoke_MemberName::_type_offset;
2748 int java_lang_invoke_MemberName::_flags_offset;
2749 int java_lang_invoke_MemberName::_vmtarget_offset;
2750 int java_lang_invoke_MemberName::_vmloader_offset;
2751 int java_lang_invoke_MemberName::_vmindex_offset;
2752 
2753 int java_lang_invoke_LambdaForm::_vmentry_offset;
2754 
2755 void java_lang_invoke_MethodHandle::compute_offsets() {
2756   Klass* klass_oop = SystemDictionary::MethodHandle_klass();
2757   if (klass_oop != NULL && EnableInvokeDynamic) {
2758     compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature());
2759     compute_optional_offset(_form_offset, klass_oop, vmSymbols::form_name(), vmSymbols::java_lang_invoke_LambdaForm_signature());
2760     if (_form_offset == 0) {
2761       EnableInvokeDynamic = false;
2762     }
2763   }
2764 }
2765 
2766 void java_lang_invoke_MemberName::compute_offsets() {
2767   Klass* klass_oop = SystemDictionary::MemberName_klass();
2768   if (klass_oop != NULL && EnableInvokeDynamic) {
2769     compute_offset(_clazz_offset,     klass_oop, vmSymbols::clazz_name(),     vmSymbols::class_signature());
2770     compute_offset(_name_offset,      klass_oop, vmSymbols::name_name(),      vmSymbols::string_signature());
2771     compute_offset(_type_offset,      klass_oop, vmSymbols::type_name(),      vmSymbols::object_signature());
2772     compute_offset(_flags_offset,     klass_oop, vmSymbols::flags_name(),     vmSymbols::int_signature());
2773     MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2774   }
2775 }
2776 
2777 void java_lang_invoke_LambdaForm::compute_offsets() {
2778   Klass* klass_oop = SystemDictionary::LambdaForm_klass();
2779   if (klass_oop != NULL && EnableInvokeDynamic) {
2780     compute_offset(_vmentry_offset, klass_oop, vmSymbols::vmentry_name(), vmSymbols::java_lang_invoke_MemberName_signature());
2781   }
2782 }
2783 
2784 oop java_lang_invoke_MethodHandle::type(oop mh) {
2785   return mh->obj_field(_type_offset);
2786 }
2787 
2788 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
2789   mh->obj_field_put(_type_offset, mtype);
2790 }
2791 
2792 oop java_lang_invoke_MethodHandle::form(oop mh) {
2793   assert(_form_offset != 0, "");
2794   return mh->obj_field(_form_offset);
2795 }
2796 
2797 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
2798   assert(_form_offset != 0, "");
2799   mh->obj_field_put(_form_offset, lform);
2800 }
2801 
2802 /// MemberName accessors
2803 
2804 oop java_lang_invoke_MemberName::clazz(oop mname) {
2805   assert(is_instance(mname), "wrong type");
2806   return mname->obj_field(_clazz_offset);
2807 }
2808 
2809 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
2810   assert(is_instance(mname), "wrong type");
2811   mname->obj_field_put(_clazz_offset, clazz);
2812 }
2813 
2814 oop java_lang_invoke_MemberName::name(oop mname) {
2815   assert(is_instance(mname), "wrong type");
2816   return mname->obj_field(_name_offset);
2817 }
2818 
2819 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
2820   assert(is_instance(mname), "wrong type");
2821   mname->obj_field_put(_name_offset, name);
2822 }
2823 
2824 oop java_lang_invoke_MemberName::type(oop mname) {
2825   assert(is_instance(mname), "wrong type");
2826   return mname->obj_field(_type_offset);
2827 }
2828 
2829 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
2830   assert(is_instance(mname), "wrong type");
2831   mname->obj_field_put(_type_offset, type);
2832 }
2833 
2834 int java_lang_invoke_MemberName::flags(oop mname) {
2835   assert(is_instance(mname), "wrong type");
2836   return mname->int_field(_flags_offset);
2837 }
2838 
2839 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
2840   assert(is_instance(mname), "wrong type");
2841   mname->int_field_put(_flags_offset, flags);
2842 }
2843 
2844 Metadata* java_lang_invoke_MemberName::vmtarget(oop mname) {
2845   assert(is_instance(mname), "wrong type");
2846   return (Metadata*)mname->address_field(_vmtarget_offset);
2847 }
2848 
2849 bool java_lang_invoke_MemberName::is_method(oop mname) {
2850   assert(is_instance(mname), "must be MemberName");
2851   return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
2852 }
2853 
2854 void java_lang_invoke_MemberName::set_vmtarget(oop mname, Metadata* ref) {
2855   assert(is_instance(mname), "wrong type");
2856   // check the type of the vmtarget
2857   oop dependency = NULL;
2858   if (ref != NULL) {
2859     switch (flags(mname) & (MN_IS_METHOD |
2860                             MN_IS_CONSTRUCTOR |
2861                             MN_IS_FIELD)) {
2862     case MN_IS_METHOD:
2863     case MN_IS_CONSTRUCTOR:
2864       assert(ref->is_method(), "should be a method");
2865       dependency = ((Method*)ref)->method_holder()->java_mirror();
2866       break;
2867     case MN_IS_FIELD:
2868       assert(ref->is_klass(), "should be a class");
2869       dependency = ((Klass*)ref)->java_mirror();
2870       break;
2871     default:
2872       ShouldNotReachHere();
2873     }
2874   }
2875   mname->address_field_put(_vmtarget_offset, (address)ref);
2876   // Add a reference to the loader (actually mirror because anonymous classes will not have
2877   // distinct loaders) to ensure the metadata is kept alive
2878   // This mirror may be different than the one in clazz field.
2879   mname->obj_field_put(_vmloader_offset, dependency);
2880 }
2881 
2882 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
2883   assert(is_instance(mname), "wrong type");
2884   return (intptr_t) mname->address_field(_vmindex_offset);
2885 }
2886 
2887 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
2888   assert(is_instance(mname), "wrong type");
2889   mname->address_field_put(_vmindex_offset, (address) index);
2890 }
2891 
2892 bool java_lang_invoke_MemberName::equals(oop mn1, oop mn2) {
2893   if (mn1 == mn2) {
2894      return true;
2895   }
2896   return (vmtarget(mn1) == vmtarget(mn2) && flags(mn1) == flags(mn2) &&
2897           vmindex(mn1) == vmindex(mn2) &&
2898           clazz(mn1) == clazz(mn2));
2899 }
2900 
2901 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
2902   assert(is_instance(lform), "wrong type");
2903   return lform->obj_field(_vmentry_offset);
2904 }
2905 
2906 
2907 // Support for java_lang_invoke_MethodType
2908 
2909 int java_lang_invoke_MethodType::_rtype_offset;
2910 int java_lang_invoke_MethodType::_ptypes_offset;
2911 
2912 void java_lang_invoke_MethodType::compute_offsets() {
2913   Klass* k = SystemDictionary::MethodType_klass();
2914   if (k != NULL) {
2915     compute_offset(_rtype_offset,  k, vmSymbols::rtype_name(),  vmSymbols::class_signature());
2916     compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature());
2917   }
2918 }
2919 
2920 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
2921   st->print("(");
2922   objArrayOop pts = ptypes(mt);
2923   for (int i = 0, limit = pts->length(); i < limit; i++) {
2924     java_lang_Class::print_signature(pts->obj_at(i), st);
2925   }
2926   st->print(")");
2927   java_lang_Class::print_signature(rtype(mt), st);
2928 }
2929 
2930 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) {
2931   ResourceMark rm;
2932   stringStream buffer(128);
2933   print_signature(mt, &buffer);
2934   const char* sigstr =       buffer.base();
2935   int         siglen = (int) buffer.size();
2936   Symbol *name;
2937   if (!intern_if_not_found) {
2938     name = SymbolTable::probe(sigstr, siglen);
2939   } else {
2940     name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
2941   }
2942   return name;
2943 }
2944 
2945 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
2946   if (mt1 == mt2)
2947     return true;
2948   if (rtype(mt1) != rtype(mt2))
2949     return false;
2950   if (ptype_count(mt1) != ptype_count(mt2))
2951     return false;
2952   for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
2953     if (ptype(mt1, i) != ptype(mt2, i))
2954       return false;
2955   }
2956   return true;
2957 }
2958 
2959 oop java_lang_invoke_MethodType::rtype(oop mt) {
2960   assert(is_instance(mt), "must be a MethodType");
2961   return mt->obj_field(_rtype_offset);
2962 }
2963 
2964 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
2965   assert(is_instance(mt), "must be a MethodType");
2966   return (objArrayOop) mt->obj_field(_ptypes_offset);
2967 }
2968 
2969 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
2970   return ptypes(mt)->obj_at(idx);
2971 }
2972 
2973 int java_lang_invoke_MethodType::ptype_count(oop mt) {
2974   return ptypes(mt)->length();
2975 }
2976 
2977 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
2978   objArrayOop pts = ptypes(mt);
2979   int count = pts->length();
2980   int slots = 0;
2981   for (int i = 0; i < count; i++) {
2982     BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
2983     slots += type2size[bt];
2984   }
2985   return slots;
2986 }
2987 
2988 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
2989   BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
2990   return type2size[bt];
2991 }
2992 
2993 
2994 // Support for java_lang_invoke_CallSite
2995 
2996 int java_lang_invoke_CallSite::_target_offset;
2997 
2998 void java_lang_invoke_CallSite::compute_offsets() {
2999   if (!EnableInvokeDynamic)  return;
3000   Klass* k = SystemDictionary::CallSite_klass();
3001   if (k != NULL) {
3002     compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature());
3003   }
3004 }
3005 
3006 
3007 // Support for java_security_AccessControlContext
3008 
3009 int java_security_AccessControlContext::_context_offset = 0;
3010 int java_security_AccessControlContext::_privilegedContext_offset = 0;
3011 int java_security_AccessControlContext::_isPrivileged_offset = 0;
3012 int java_security_AccessControlContext::_isAuthorized_offset = -1;
3013 
3014 void java_security_AccessControlContext::compute_offsets() {
3015   assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
3016   fieldDescriptor fd;
3017   InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass());
3018 
3019   if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) {
3020     fatal("Invalid layout of java.security.AccessControlContext");
3021   }
3022   _context_offset = fd.offset();
3023 
3024   if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) {
3025     fatal("Invalid layout of java.security.AccessControlContext");
3026   }
3027   _privilegedContext_offset = fd.offset();
3028 
3029   if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) {
3030     fatal("Invalid layout of java.security.AccessControlContext");
3031   }
3032   _isPrivileged_offset = fd.offset();
3033 
3034   // The offset may not be present for bootstrapping with older JDK.
3035   if (ik->find_local_field(vmSymbols::isAuthorized_name(), vmSymbols::bool_signature(), &fd)) {
3036     _isAuthorized_offset = fd.offset();
3037   }
3038 }
3039 
3040 
3041 bool java_security_AccessControlContext::is_authorized(Handle context) {
3042   assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type");
3043   assert(_isAuthorized_offset != -1, "should be set");
3044   return context->bool_field(_isAuthorized_offset) != 0;
3045 }
3046 
3047 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
3048   assert(_isPrivileged_offset != 0, "offsets should have been initialized");
3049   // Ensure klass is initialized
3050   InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->initialize(CHECK_0);
3051   // Allocate result
3052   oop result = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->allocate_instance(CHECK_0);
3053   // Fill in values
3054   result->obj_field_put(_context_offset, context());
3055   result->obj_field_put(_privilegedContext_offset, privileged_context());
3056   result->bool_field_put(_isPrivileged_offset, isPrivileged);
3057   // whitelist AccessControlContexts created by the JVM if present
3058   if (_isAuthorized_offset != -1) {
3059     result->bool_field_put(_isAuthorized_offset, true);
3060   }
3061   return result;
3062 }
3063 
3064 
3065 // Support for java_lang_ClassLoader
3066 
3067 bool java_lang_ClassLoader::offsets_computed = false;
3068 int  java_lang_ClassLoader::_loader_data_offset = -1;
3069 int  java_lang_ClassLoader::parallelCapable_offset = -1;
3070 
3071 ClassLoaderData** java_lang_ClassLoader::loader_data_addr(oop loader) {
3072     assert(loader != NULL && loader->is_oop(), "loader must be oop");
3073     return (ClassLoaderData**) loader->address_field_addr(_loader_data_offset);
3074 }
3075 
3076 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
3077   return *java_lang_ClassLoader::loader_data_addr(loader);
3078 }
3079 
3080 void java_lang_ClassLoader::compute_offsets() {
3081   assert(!offsets_computed, "offsets should be initialized only once");
3082   offsets_computed = true;
3083 
3084   // The field indicating parallelCapable (parallelLockMap) is only present starting in 7,
3085   Klass* k1 = SystemDictionary::ClassLoader_klass();
3086   compute_optional_offset(parallelCapable_offset,
3087     k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature());
3088 
3089   CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3090 }
3091 
3092 oop java_lang_ClassLoader::parent(oop loader) {
3093   assert(is_instance(loader), "loader must be oop");
3094   return loader->obj_field(parent_offset);
3095 }
3096 
3097 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
3098   assert(is_instance(loader), "loader must be oop");
3099   assert(cl == NULL || is_instance(cl), "cl argument must be oop");
3100   oop acl = loader;
3101   debug_only(jint loop_count = 0);
3102   // This loop taken verbatim from ClassLoader.java:
3103   do {
3104     acl = parent(acl);
3105     if (cl == acl) {
3106       return true;
3107     }
3108     assert(++loop_count > 0, "loop_count overflow");
3109   } while (acl != NULL);
3110   return false;
3111 }
3112 
3113 
3114 // For class loader classes, parallelCapable defined
3115 // based on non-null field
3116 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
3117 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
3118   if (!JDK_Version::is_gte_jdk17x_version()
3119      || parallelCapable_offset == -1) {
3120      // Default for backward compatibility is false
3121      return false;
3122   }
3123   return (class_loader->obj_field(parallelCapable_offset) != NULL);
3124 }
3125 
3126 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
3127   // Fix for 4474172; see evaluation for more details
3128   loader = non_reflection_class_loader(loader);
3129 
3130   oop cl = SystemDictionary::java_system_loader();
3131   while(cl != NULL) {
3132     if (cl == loader) return true;
3133     cl = parent(cl);
3134   }
3135   return false;
3136 }
3137 
3138 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
3139   if (loader != NULL) {
3140     // See whether this is one of the class loaders associated with
3141     // the generated bytecodes for reflection, and if so, "magically"
3142     // delegate to its parent to prevent class loading from occurring
3143     // in places where applications using reflection didn't expect it.
3144     Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
3145     // This might be null in non-1.4 JDKs
3146     if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) {
3147       return parent(loader);
3148     }
3149   }
3150   return loader;
3151 }
3152 
3153 
3154 // Support for java_lang_System
3155 int java_lang_System::in_offset_in_bytes() {
3156   return (InstanceMirrorKlass::offset_of_static_fields() + static_in_offset);
3157 }
3158 
3159 
3160 int java_lang_System::out_offset_in_bytes() {
3161   return (InstanceMirrorKlass::offset_of_static_fields() + static_out_offset);
3162 }
3163 
3164 
3165 int java_lang_System::err_offset_in_bytes() {
3166   return (InstanceMirrorKlass::offset_of_static_fields() + static_err_offset);
3167 }
3168 
3169 
3170 bool java_lang_System::has_security_manager() {
3171   InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::System_klass());
3172   address addr = ik->static_field_addr(static_security_offset);
3173   if (UseCompressedOops) {
3174     return oopDesc::load_decode_heap_oop((narrowOop *)addr) != NULL;
3175   } else {
3176     return oopDesc::load_decode_heap_oop((oop*)addr) != NULL;
3177   }
3178 }
3179 
3180 int java_lang_Class::_klass_offset;
3181 int java_lang_Class::_array_klass_offset;
3182 int java_lang_Class::_oop_size_offset;
3183 int java_lang_Class::_static_oop_field_count_offset;
3184 int java_lang_Class::_class_loader_offset;
3185 int java_lang_Class::_protection_domain_offset;
3186 int java_lang_Class::_init_lock_offset;
3187 int java_lang_Class::_signers_offset;
3188 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
3189 int java_lang_Throwable::backtrace_offset;
3190 int java_lang_Throwable::detailMessage_offset;
3191 int java_lang_Throwable::cause_offset;
3192 int java_lang_Throwable::stackTrace_offset;
3193 int java_lang_Throwable::static_unassigned_stacktrace_offset;
3194 int java_lang_reflect_AccessibleObject::override_offset;
3195 int java_lang_reflect_Method::clazz_offset;
3196 int java_lang_reflect_Method::name_offset;
3197 int java_lang_reflect_Method::returnType_offset;
3198 int java_lang_reflect_Method::parameterTypes_offset;
3199 int java_lang_reflect_Method::exceptionTypes_offset;
3200 int java_lang_reflect_Method::slot_offset;
3201 int java_lang_reflect_Method::modifiers_offset;
3202 int java_lang_reflect_Method::signature_offset;
3203 int java_lang_reflect_Method::annotations_offset;
3204 int java_lang_reflect_Method::parameter_annotations_offset;
3205 int java_lang_reflect_Method::annotation_default_offset;
3206 int java_lang_reflect_Method::type_annotations_offset;
3207 int java_lang_reflect_Constructor::clazz_offset;
3208 int java_lang_reflect_Constructor::parameterTypes_offset;
3209 int java_lang_reflect_Constructor::exceptionTypes_offset;
3210 int java_lang_reflect_Constructor::slot_offset;
3211 int java_lang_reflect_Constructor::modifiers_offset;
3212 int java_lang_reflect_Constructor::signature_offset;
3213 int java_lang_reflect_Constructor::annotations_offset;
3214 int java_lang_reflect_Constructor::parameter_annotations_offset;
3215 int java_lang_reflect_Constructor::type_annotations_offset;
3216 int java_lang_reflect_Field::clazz_offset;
3217 int java_lang_reflect_Field::name_offset;
3218 int java_lang_reflect_Field::type_offset;
3219 int java_lang_reflect_Field::slot_offset;
3220 int java_lang_reflect_Field::modifiers_offset;
3221 int java_lang_reflect_Field::signature_offset;
3222 int java_lang_reflect_Field::annotations_offset;
3223 int java_lang_reflect_Field::type_annotations_offset;
3224 int java_lang_reflect_Parameter::name_offset;
3225 int java_lang_reflect_Parameter::modifiers_offset;
3226 int java_lang_reflect_Parameter::index_offset;
3227 int java_lang_reflect_Parameter::executable_offset;
3228 int java_lang_boxing_object::value_offset;
3229 int java_lang_boxing_object::long_value_offset;
3230 int java_lang_ref_Reference::referent_offset;
3231 int java_lang_ref_Reference::queue_offset;
3232 int java_lang_ref_Reference::next_offset;
3233 int java_lang_ref_Reference::discovered_offset;
3234 int java_lang_ref_Reference::static_lock_offset;
3235 int java_lang_ref_Reference::static_pending_offset;
3236 int java_lang_ref_Reference::number_of_fake_oop_fields;
3237 int java_lang_ref_ReferenceQueue::static_NULL_queue_offset;
3238 int java_lang_ref_ReferenceQueue::static_ENQUEUED_queue_offset;
3239 int java_lang_ref_SoftReference::timestamp_offset;
3240 int java_lang_ref_SoftReference::static_clock_offset;
3241 int java_lang_ClassLoader::parent_offset;
3242 int java_lang_System::static_in_offset;
3243 int java_lang_System::static_out_offset;
3244 int java_lang_System::static_err_offset;
3245 int java_lang_System::static_security_offset;
3246 int java_lang_StackTraceElement::declaringClass_offset;
3247 int java_lang_StackTraceElement::methodName_offset;
3248 int java_lang_StackTraceElement::fileName_offset;
3249 int java_lang_StackTraceElement::lineNumber_offset;
3250 int java_lang_AssertionStatusDirectives::classes_offset;
3251 int java_lang_AssertionStatusDirectives::classEnabled_offset;
3252 int java_lang_AssertionStatusDirectives::packages_offset;
3253 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
3254 int java_lang_AssertionStatusDirectives::deflt_offset;
3255 int java_nio_Buffer::_limit_offset;
3256 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0;
3257 int sun_reflect_ConstantPool::_oop_offset;
3258 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
3259 
3260 
3261 // Support for java_lang_StackTraceElement
3262 
3263 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
3264   element->obj_field_put(fileName_offset, value);
3265 }
3266 
3267 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
3268   element->obj_field_put(declaringClass_offset, value);
3269 }
3270 
3271 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
3272   element->obj_field_put(methodName_offset, value);
3273 }
3274 
3275 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
3276   element->int_field_put(lineNumber_offset, value);
3277 }
3278 
3279 
3280 // Support for java Assertions - java_lang_AssertionStatusDirectives.
3281 
3282 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
3283   o->obj_field_put(classes_offset, val);
3284 }
3285 
3286 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
3287   o->obj_field_put(classEnabled_offset, val);
3288 }
3289 
3290 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
3291   o->obj_field_put(packages_offset, val);
3292 }
3293 
3294 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
3295   o->obj_field_put(packageEnabled_offset, val);
3296 }
3297 
3298 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
3299   o->bool_field_put(deflt_offset, val);
3300 }
3301 
3302 
3303 // Support for intrinsification of java.nio.Buffer.checkIndex
3304 int java_nio_Buffer::limit_offset() {
3305   return _limit_offset;
3306 }
3307 
3308 
3309 void java_nio_Buffer::compute_offsets() {
3310   Klass* k = SystemDictionary::nio_Buffer_klass();
3311   assert(k != NULL, "must be loaded in 1.4+");
3312   compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature());
3313 }
3314 
3315 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) {
3316   if (_owner_offset != 0) return;
3317 
3318   assert(JDK_Version::is_gte_jdk16x_version(), "Must be JDK 1.6 or later");
3319   SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK);
3320   Klass* k = SystemDictionary::abstract_ownable_synchronizer_klass();
3321   compute_offset(_owner_offset, k,
3322                  vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature());
3323 }
3324 
3325 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
3326   assert(_owner_offset != 0, "Must be initialized");
3327   return obj->obj_field(_owner_offset);
3328 }
3329 
3330 // Compute hard-coded offsets
3331 // Invoked before SystemDictionary::initialize, so pre-loaded classes
3332 // are not available to determine the offset_of_static_fields.
3333 void JavaClasses::compute_hard_coded_offsets() {
3334   const int x = heapOopSize;
3335   const int header = instanceOopDesc::base_offset_in_bytes();
3336 
3337   // Throwable Class
3338   java_lang_Throwable::backtrace_offset  = java_lang_Throwable::hc_backtrace_offset  * x + header;
3339   java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header;
3340   java_lang_Throwable::cause_offset      = java_lang_Throwable::hc_cause_offset      * x + header;
3341   java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header;
3342   java_lang_Throwable::static_unassigned_stacktrace_offset = java_lang_Throwable::hc_static_unassigned_stacktrace_offset *  x;
3343 
3344   // java_lang_boxing_object
3345   java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header;
3346   java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong);
3347 
3348   // java_lang_ref_Reference:
3349   java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header;
3350   java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header;
3351   java_lang_ref_Reference::next_offset  = java_lang_ref_Reference::hc_next_offset * x + header;
3352   java_lang_ref_Reference::discovered_offset  = java_lang_ref_Reference::hc_discovered_offset * x + header;
3353   java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset *  x;
3354   java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x;
3355   // Artificial fields for java_lang_ref_Reference
3356   // The first field is for the discovered field added in 1.4
3357   java_lang_ref_Reference::number_of_fake_oop_fields = 1;
3358 
3359   // java_lang_ref_SoftReference Class
3360   java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong);
3361   // Don't multiply static fields because they are always in wordSize units
3362   java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x;
3363 
3364   // java_lang_ClassLoader
3365   java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header;
3366 
3367   // java_lang_System
3368   java_lang_System::static_in_offset  = java_lang_System::hc_static_in_offset  * x;
3369   java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x;
3370   java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x;
3371   java_lang_System::static_security_offset = java_lang_System::hc_static_security_offset * x;
3372 
3373   // java_lang_StackTraceElement
3374   java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset  * x + header;
3375   java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header;
3376   java_lang_StackTraceElement::fileName_offset   = java_lang_StackTraceElement::hc_fileName_offset   * x + header;
3377   java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header;
3378   java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header;
3379   java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header;
3380   java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header;
3381   java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header;
3382   java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header;
3383 
3384 }
3385 
3386 
3387 // Compute non-hard-coded field offsets of all the classes in this file
3388 void JavaClasses::compute_offsets() {
3389   // java_lang_Class::compute_offsets was called earlier in bootstrap
3390   java_lang_ClassLoader::compute_offsets();
3391   java_lang_Thread::compute_offsets();
3392   java_lang_ThreadGroup::compute_offsets();
3393   if (EnableInvokeDynamic) {
3394     java_lang_invoke_MethodHandle::compute_offsets();
3395     java_lang_invoke_DirectMethodHandle::compute_offsets();
3396     java_lang_invoke_MemberName::compute_offsets();
3397     java_lang_invoke_LambdaForm::compute_offsets();
3398     java_lang_invoke_MethodType::compute_offsets();
3399     java_lang_invoke_CallSite::compute_offsets();
3400   }
3401   java_security_AccessControlContext::compute_offsets();
3402   // Initialize reflection classes. The layouts of these classes
3403   // changed with the new reflection implementation in JDK 1.4, and
3404   // since the Universe doesn't know what JDK version it is until this
3405   // point we defer computation of these offsets until now.
3406   java_lang_reflect_AccessibleObject::compute_offsets();
3407   java_lang_reflect_Method::compute_offsets();
3408   java_lang_reflect_Constructor::compute_offsets();
3409   java_lang_reflect_Field::compute_offsets();
3410   if (JDK_Version::is_gte_jdk14x_version()) {
3411     java_nio_Buffer::compute_offsets();
3412   }
3413   if (JDK_Version::is_gte_jdk15x_version()) {
3414     sun_reflect_ConstantPool::compute_offsets();
3415     sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets();
3416   }
3417   if (JDK_Version::is_jdk18x_version())
3418     java_lang_reflect_Parameter::compute_offsets();
3419 
3420   java_lang_ref_ReferenceQueue::compute_offsets();
3421 
3422   // generated interpreter code wants to know about the offsets we just computed:
3423   AbstractAssembler::update_delayed_values();
3424 }
3425 
3426 #ifndef PRODUCT
3427 
3428 // These functions exist to assert the validity of hard-coded field offsets to guard
3429 // against changes in the class files
3430 
3431 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3432   EXCEPTION_MARK;
3433   fieldDescriptor fd;
3434   TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3435   Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3436   instanceKlassHandle h_klass (THREAD, k);
3437   TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3438   TempNewSymbol f_sig  = SymbolTable::new_symbol(field_sig, CATCH);
3439   if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3440     tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
3441     return false;
3442   }
3443   if (fd.is_static()) {
3444     tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
3445     return false;
3446   }
3447   if (fd.offset() == hardcoded_offset ) {
3448     return true;
3449   } else {
3450     tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
3451                   klass_name, field_name, hardcoded_offset, fd.offset());
3452     return false;
3453   }
3454 }
3455 
3456 
3457 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3458   EXCEPTION_MARK;
3459   fieldDescriptor fd;
3460   TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3461   Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3462   instanceKlassHandle h_klass (THREAD, k);
3463   TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3464   TempNewSymbol f_sig  = SymbolTable::new_symbol(field_sig, CATCH);
3465   if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3466     tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3467     return false;
3468   }
3469   if (!fd.is_static()) {
3470     tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name);
3471     return false;
3472   }
3473   if (fd.offset() == hardcoded_offset + InstanceMirrorKlass::offset_of_static_fields()) {
3474     return true;
3475   } else {
3476     tty->print_cr("Offset of static field %s.%s is hardcoded as %d but should really be %d.", klass_name, field_name, hardcoded_offset, fd.offset() - InstanceMirrorKlass::offset_of_static_fields());
3477     return false;
3478   }
3479 }
3480 
3481 
3482 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) {
3483   EXCEPTION_MARK;
3484   fieldDescriptor fd;
3485   TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3486   Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3487   instanceKlassHandle h_klass (THREAD, k);
3488   TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3489   TempNewSymbol f_sig  = SymbolTable::new_symbol(field_sig, CATCH);
3490   if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3491     tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3492     return false;
3493   }
3494   if (!fd.is_static() || !fd.has_initial_value()) {
3495     tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name);
3496     return false;
3497   }
3498   if (!fd.initial_value_tag().is_int()) {
3499     tty->print_cr("Static field %s.%s is not an int", klass_name, field_name);
3500     return false;
3501   }
3502   jint field_value = fd.int_initial_value();
3503   if (field_value == hardcoded_constant) {
3504     return true;
3505   } else {
3506     tty->print_cr("Constant value of static field %s.%s is hardcoded as %d but should really be %d.", klass_name, field_name, hardcoded_constant, field_value);
3507     return false;
3508   }
3509 }
3510 
3511 
3512 // Check the hard-coded field offsets of all the classes in this file
3513 
3514 void JavaClasses::check_offsets() {
3515   bool valid = true;
3516   HandleMark hm;
3517 
3518 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3519   valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
3520 
3521 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3522   valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
3523 
3524 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3525   valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig)
3526 
3527 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \
3528   valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig)
3529 
3530   // java.lang.String
3531 
3532   CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C");
3533   if (java_lang_String::has_offset_field()) {
3534     CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I");
3535     CHECK_OFFSET("java/lang/String", java_lang_String, count, "I");
3536   }
3537   if (java_lang_String::has_hash_field()) {
3538     CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I");
3539   }
3540 
3541   // java.lang.Class
3542 
3543   // Fake fields
3544   // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked
3545   // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked
3546 
3547   // java.lang.Throwable
3548 
3549   CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;");
3550   CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;");
3551   CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;");
3552   CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;");
3553 
3554   // Boxed primitive objects (java_lang_boxing_object)
3555 
3556   CHECK_OFFSET("java/lang/Boolean",   java_lang_boxing_object, value, "Z");
3557   CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
3558   CHECK_OFFSET("java/lang/Float",     java_lang_boxing_object, value, "F");
3559   CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
3560   CHECK_OFFSET("java/lang/Byte",      java_lang_boxing_object, value, "B");
3561   CHECK_OFFSET("java/lang/Short",     java_lang_boxing_object, value, "S");
3562   CHECK_OFFSET("java/lang/Integer",   java_lang_boxing_object, value, "I");
3563   CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
3564 
3565   // java.lang.ClassLoader
3566 
3567   CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent,      "Ljava/lang/ClassLoader;");
3568 
3569   // java.lang.System
3570 
3571   CHECK_STATIC_OFFSET("java/lang/System", java_lang_System,  in, "Ljava/io/InputStream;");
3572   CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;");
3573   CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;");
3574   CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, security, "Ljava/lang/SecurityManager;");
3575 
3576   // java.lang.StackTraceElement
3577 
3578   CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;");
3579   CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;");
3580   CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement,   fileName, "Ljava/lang/String;");
3581   CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I");
3582 
3583   // java.lang.ref.Reference
3584 
3585   CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
3586   CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
3587   CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
3588   // Fake field
3589   //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
3590   CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;");
3591   CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;");
3592 
3593   // java.lang.ref.SoftReference
3594 
3595   CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J");
3596   CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J");
3597 
3598   // java.lang.AssertionStatusDirectives
3599   //
3600   // The CheckAssertionStatusDirectives boolean can be removed from here and
3601   // globals.hpp after the AssertionStatusDirectives class has been integrated
3602   // into merlin "for some time."  Without it, the vm will fail with early
3603   // merlin builds.
3604 
3605   if (CheckAssertionStatusDirectives && JDK_Version::is_gte_jdk14x_version()) {
3606     const char* nm = "java/lang/AssertionStatusDirectives";
3607     const char* sig = "[Ljava/lang/String;";
3608     CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig);
3609     CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z");
3610     CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig);
3611     CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z");
3612     CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z");
3613   }
3614 
3615   if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
3616 }
3617 
3618 #endif // PRODUCT
3619 
3620 int InjectedField::compute_offset() {
3621   Klass* klass_oop = klass();
3622   for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
3623     if (!may_be_java && !fs.access_flags().is_internal()) {
3624       // Only look at injected fields
3625       continue;
3626     }
3627     if (fs.name() == name() && fs.signature() == signature()) {
3628       return fs.offset();
3629     }
3630   }
3631   ResourceMark rm;
3632   tty->print_cr("Invalid layout of %s at %s/%s%s", InstanceKlass::cast(klass_oop)->external_name(), name()->as_C_string(), signature()->as_C_string(), may_be_java ? " (may_be_java)" : "");
3633 #ifndef PRODUCT
3634   klass_oop->print();
3635   tty->print_cr("all fields:");
3636   for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
3637     tty->print_cr("  name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
3638   }
3639 #endif //PRODUCT
3640   vm_exit_during_initialization("Invalid layout of preloaded class: use -XX:+TraceClassLoading to see the origin of the problem class");
3641   return -1;
3642 }
3643 
3644 void javaClasses_init() {
3645   JavaClasses::compute_offsets();
3646   JavaClasses::check_offsets();
3647   FilteredFieldsMap::initialize();  // must be done after computing offsets.
3648 }