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