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