1 /*
   2  * Copyright (c) 1997, 2015, 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.inline.hpp"
  28 #include "classfile/stringTable.hpp"
  29 #include "classfile/vmSymbols.hpp"
  30 #include "code/debugInfo.hpp"
  31 #include "code/pcDesc.hpp"
  32 #include "interpreter/interpreter.hpp"
  33 #include "memory/oopFactory.hpp"
  34 #include "memory/resourceArea.hpp"
  35 #include "memory/universe.inline.hpp"
  36 #include "oops/fieldStreams.hpp"
  37 #include "oops/instanceKlass.hpp"
  38 #include "oops/instanceMirrorKlass.hpp"
  39 #include "oops/klass.hpp"
  40 #include "oops/method.hpp"
  41 #include "oops/objArrayOop.inline.hpp"
  42 #include "oops/oop.inline.hpp"
  43 #include "oops/symbol.hpp"
  44 #include "oops/typeArrayOop.hpp"
  45 #include "prims/jvmtiRedefineClassesTrace.hpp"
  46 #include "runtime/fieldDescriptor.hpp"
  47 #include "runtime/handles.inline.hpp"
  48 #include "runtime/interfaceSupport.hpp"
  49 #include "runtime/java.hpp"
  50 #include "runtime/javaCalls.hpp"
  51 #include "runtime/safepoint.hpp"
  52 #include "runtime/thread.inline.hpp"
  53 #include "runtime/vframe.hpp"
  54 #include "utilities/preserveException.hpp"
  55 
  56 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
  57 
  58 #define INJECTED_FIELD_COMPUTE_OFFSET(klass, name, signature, may_be_java)    \
  59   klass::_##name##_offset = JavaClasses::compute_injected_offset(JavaClasses::klass##_##name##_enum);
  60 
  61 #define DECLARE_INJECTED_FIELD(klass, name, signature, may_be_java)           \
  62   { SystemDictionary::WK_KLASS_ENUM_NAME(klass), vmSymbols::VM_SYMBOL_ENUM_NAME(name##_name), vmSymbols::VM_SYMBOL_ENUM_NAME(signature), may_be_java },
  63 
  64 InjectedField JavaClasses::_injected_fields[] = {
  65   ALL_INJECTED_FIELDS(DECLARE_INJECTED_FIELD)
  66 };
  67 
  68 int JavaClasses::compute_injected_offset(InjectedFieldID id) {
  69   return _injected_fields[id].compute_offset();
  70 }
  71 
  72 
  73 InjectedField* JavaClasses::get_injected(Symbol* class_name, int* field_count) {
  74   *field_count = 0;
  75 
  76   vmSymbols::SID sid = vmSymbols::find_sid(class_name);
  77   if (sid == vmSymbols::NO_SID) {
  78     // Only well known classes can inject fields
  79     return NULL;
  80   }
  81 
  82   int count = 0;
  83   int start = -1;
  84 
  85 #define LOOKUP_INJECTED_FIELD(klass, name, signature, may_be_java) \
  86   if (sid == vmSymbols::VM_SYMBOL_ENUM_NAME(klass)) {              \
  87     count++;                                                       \
  88     if (start == -1) start = klass##_##name##_enum;                \
  89   }
  90   ALL_INJECTED_FIELDS(LOOKUP_INJECTED_FIELD);
  91 #undef LOOKUP_INJECTED_FIELD
  92 
  93   if (start != -1) {
  94     *field_count = count;
  95     return _injected_fields + start;
  96   }
  97   return NULL;
  98 }
  99 
 100 
 101 static bool find_field(InstanceKlass* ik,
 102                        Symbol* name_symbol, Symbol* signature_symbol,
 103                        fieldDescriptor* fd,
 104                        bool is_static = false, bool allow_super = false) {
 105   if (allow_super || is_static) {
 106     return ik->find_field(name_symbol, signature_symbol, is_static, fd) != NULL;
 107   } else {
 108     return ik->find_local_field(name_symbol, signature_symbol, fd);
 109   }
 110 }
 111 
 112 // Helpful routine for computing field offsets at run time rather than hardcoding them
 113 static void
 114 compute_offset(int &dest_offset,
 115                Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol,
 116                bool is_static = false, bool allow_super = false) {
 117   fieldDescriptor fd;
 118   InstanceKlass* ik = InstanceKlass::cast(klass_oop);
 119   if (!find_field(ik, name_symbol, signature_symbol, &fd, is_static, allow_super)) {
 120     ResourceMark rm;
 121     tty->print_cr("Invalid layout of %s at %s", ik->external_name(), name_symbol->as_C_string());
 122 #ifndef PRODUCT
 123     klass_oop->print();
 124     tty->print_cr("all fields:");
 125     for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
 126       tty->print_cr("  name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
 127     }
 128 #endif //PRODUCT
 129     vm_exit_during_initialization("Invalid layout of preloaded class: use -XX:+TraceClassLoading to see the origin of the problem class");
 130   }
 131   dest_offset = fd.offset();
 132 }
 133 
 134 // Same as above but for "optional" offsets that might not be present in certain JDK versions
 135 static void
 136 compute_optional_offset(int& dest_offset,
 137                         Klass* klass_oop, Symbol* name_symbol, Symbol* signature_symbol,
 138                         bool allow_super = false) {
 139   fieldDescriptor fd;
 140   InstanceKlass* ik = InstanceKlass::cast(klass_oop);
 141   if (find_field(ik, name_symbol, signature_symbol, &fd, allow_super)) {
 142     dest_offset = fd.offset();
 143   }
 144 }
 145 
 146 
 147 int java_lang_String::value_offset  = 0;
 148 int java_lang_String::offset_offset = 0;
 149 int java_lang_String::count_offset  = 0;
 150 int java_lang_String::hash_offset   = 0;
 151 
 152 bool java_lang_String::initialized  = false;
 153 
 154 bool java_lang_String::is_instance(oop obj) {
 155   return is_instance_inlined(obj);
 156 }
 157 
 158 void java_lang_String::compute_offsets() {
 159   assert(!initialized, "offsets should be initialized only once");
 160 
 161   Klass* k = SystemDictionary::String_klass();
 162   compute_offset(value_offset,           k, vmSymbols::value_name(),  vmSymbols::char_array_signature());
 163   compute_optional_offset(offset_offset, k, vmSymbols::offset_name(), vmSymbols::int_signature());
 164   compute_optional_offset(count_offset,  k, vmSymbols::count_name(),  vmSymbols::int_signature());
 165   compute_optional_offset(hash_offset,   k, vmSymbols::hash_name(),   vmSymbols::int_signature());
 166 
 167   initialized = true;
 168 }
 169 
 170 Handle java_lang_String::basic_create(int length, TRAPS) {
 171   assert(initialized, "Must be initialized");
 172   // Create the String object first, so there's a chance that the String
 173   // and the char array it points to end up in the same cache line.
 174   oop obj;
 175   obj = InstanceKlass::cast(SystemDictionary::String_klass())->allocate_instance(CHECK_NH);
 176 
 177   // Create the char array.  The String object must be handlized here
 178   // because GC can happen as a result of the allocation attempt.
 179   Handle h_obj(THREAD, obj);
 180   typeArrayOop buffer;
 181     buffer = oopFactory::new_charArray(length, CHECK_NH);
 182 
 183   // Point the String at the char array
 184   obj = h_obj();
 185   set_value(obj, buffer);
 186   // No need to zero the offset, allocation zero'ed the entire String object
 187   assert(offset(obj) == 0, "initial String offset should be zero");
 188 //set_offset(obj, 0);
 189   set_count(obj, length);
 190 
 191   return h_obj;
 192 }
 193 
 194 Handle java_lang_String::create_from_unicode(jchar* unicode, int length, TRAPS) {
 195   Handle h_obj = basic_create(length, CHECK_NH);
 196   typeArrayOop buffer = value(h_obj());
 197   for (int index = 0; index < length; index++) {
 198     buffer->char_at_put(index, unicode[index]);
 199   }
 200   return h_obj;
 201 }
 202 
 203 oop java_lang_String::create_oop_from_unicode(jchar* unicode, int length, TRAPS) {
 204   Handle h_obj = create_from_unicode(unicode, length, CHECK_0);
 205   return h_obj();
 206 }
 207 
 208 Handle java_lang_String::create_from_str(const char* utf8_str, TRAPS) {
 209   if (utf8_str == NULL) {
 210     return Handle();
 211   }
 212   int length = UTF8::unicode_length(utf8_str);
 213   Handle h_obj = basic_create(length, CHECK_NH);
 214   if (length > 0) {
 215     UTF8::convert_to_unicode(utf8_str, value(h_obj())->char_at_addr(0), length);
 216   }
 217   return h_obj;
 218 }
 219 
 220 oop java_lang_String::create_oop_from_str(const char* utf8_str, TRAPS) {
 221   Handle h_obj = create_from_str(utf8_str, CHECK_0);
 222   return h_obj();
 223 }
 224 
 225 Handle java_lang_String::create_from_symbol(Symbol* symbol, TRAPS) {
 226   int length = UTF8::unicode_length((char*)symbol->bytes(), symbol->utf8_length());
 227   Handle h_obj = basic_create(length, CHECK_NH);
 228   if (length > 0) {
 229     UTF8::convert_to_unicode((char*)symbol->bytes(), value(h_obj())->char_at_addr(0), length);
 230   }
 231   return h_obj;
 232 }
 233 
 234 // Converts a C string to a Java String based on current encoding
 235 Handle java_lang_String::create_from_platform_dependent_str(const char* str, TRAPS) {
 236   assert(str != NULL, "bad arguments");
 237 
 238   typedef jstring (*to_java_string_fn_t)(JNIEnv*, const char *);
 239   static to_java_string_fn_t _to_java_string_fn = NULL;
 240 
 241   if (_to_java_string_fn == NULL) {
 242     void *lib_handle = os::native_java_library();
 243     _to_java_string_fn = CAST_TO_FN_PTR(to_java_string_fn_t, os::dll_lookup(lib_handle, "NewStringPlatform"));
 244     if (_to_java_string_fn == NULL) {
 245       fatal("NewStringPlatform missing");
 246     }
 247   }
 248 
 249   jstring js = NULL;
 250   { JavaThread* thread = (JavaThread*)THREAD;
 251     assert(thread->is_Java_thread(), "must be java thread");
 252     HandleMark hm(thread);
 253     ThreadToNativeFromVM ttn(thread);
 254     js = (_to_java_string_fn)(thread->jni_environment(), str);
 255   }
 256   return Handle(THREAD, JNIHandles::resolve(js));
 257 }
 258 
 259 // Converts a Java String to a native C string that can be used for
 260 // native OS calls.
 261 char* java_lang_String::as_platform_dependent_str(Handle java_string, TRAPS) {
 262 
 263   typedef char* (*to_platform_string_fn_t)(JNIEnv*, jstring, bool*);
 264   static to_platform_string_fn_t _to_platform_string_fn = NULL;
 265 
 266   if (_to_platform_string_fn == NULL) {
 267     void *lib_handle = os::native_java_library();
 268     _to_platform_string_fn = CAST_TO_FN_PTR(to_platform_string_fn_t, os::dll_lookup(lib_handle, "GetStringPlatformChars"));
 269     if (_to_platform_string_fn == NULL) {
 270       fatal("GetStringPlatformChars missing");
 271     }
 272   }
 273 
 274   char *native_platform_string;
 275   { JavaThread* thread = (JavaThread*)THREAD;
 276     assert(thread->is_Java_thread(), "must be java thread");
 277     JNIEnv *env = thread->jni_environment();
 278     jstring js = (jstring) JNIHandles::make_local(env, java_string());
 279     bool is_copy;
 280     HandleMark hm(thread);
 281     ThreadToNativeFromVM ttn(thread);
 282     native_platform_string = (_to_platform_string_fn)(env, js, &is_copy);
 283     assert(is_copy == JNI_TRUE, "is_copy value changed");
 284     JNIHandles::destroy_local(js);
 285   }
 286   return native_platform_string;
 287 }
 288 
 289 Handle java_lang_String::char_converter(Handle java_string, jchar from_char, jchar to_char, TRAPS) {
 290   oop          obj    = java_string();
 291   // Typical usage is to convert all '/' to '.' in string.
 292   typeArrayOop value  = java_lang_String::value(obj);
 293   int          offset = java_lang_String::offset(obj);
 294   int          length = java_lang_String::length(obj);
 295 
 296   // First check if any from_char exist
 297   int index; // Declared outside, used later
 298   for (index = 0; index < length; index++) {
 299     if (value->char_at(index + offset) == from_char) {
 300       break;
 301     }
 302   }
 303   if (index == length) {
 304     // No from_char, so do not copy.
 305     return java_string;
 306   }
 307 
 308   // Create new UNICODE buffer. Must handlize value because GC
 309   // may happen during String and char array creation.
 310   typeArrayHandle h_value(THREAD, value);
 311   Handle string = basic_create(length, CHECK_NH);
 312 
 313   typeArrayOop from_buffer = h_value();
 314   typeArrayOop to_buffer   = java_lang_String::value(string());
 315 
 316   // Copy contents
 317   for (index = 0; index < length; index++) {
 318     jchar c = from_buffer->char_at(index + offset);
 319     if (c == from_char) {
 320       c = to_char;
 321     }
 322     to_buffer->char_at_put(index, c);
 323   }
 324   return string;
 325 }
 326 
 327 jchar* java_lang_String::as_unicode_string(oop java_string, int& length, TRAPS) {
 328   typeArrayOop value  = java_lang_String::value(java_string);
 329   int          offset = java_lang_String::offset(java_string);
 330                length = java_lang_String::length(java_string);
 331 
 332   jchar* result = NEW_RESOURCE_ARRAY_RETURN_NULL(jchar, length);
 333   if (result != NULL) {
 334     for (int index = 0; index < length; index++) {
 335       result[index] = value->char_at(index + offset);
 336     }
 337   } else {
 338     THROW_MSG_0(vmSymbols::java_lang_OutOfMemoryError(), "could not allocate Unicode string");
 339   }
 340   return result;
 341 }
 342 
 343 unsigned int java_lang_String::hash_code(oop java_string) {
 344   int          length = java_lang_String::length(java_string);
 345   // Zero length string will hash to zero with String.hashCode() function.
 346   if (length == 0) return 0;
 347 
 348   typeArrayOop value  = java_lang_String::value(java_string);
 349   int          offset = java_lang_String::offset(java_string);
 350   return java_lang_String::hash_code(value->char_at_addr(offset), length);
 351 }
 352 
 353 char* java_lang_String::as_quoted_ascii(oop java_string) {
 354   typeArrayOop value  = java_lang_String::value(java_string);
 355   int          offset = java_lang_String::offset(java_string);
 356   int          length = java_lang_String::length(java_string);
 357 
 358   jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
 359   if (base == NULL) return NULL;
 360 
 361   int result_length = UNICODE::quoted_ascii_length(base, length) + 1;
 362   char* result = NEW_RESOURCE_ARRAY(char, result_length);
 363   UNICODE::as_quoted_ascii(base, length, result, result_length);
 364   assert(result_length >= length + 1, "must not be shorter");
 365   assert(result_length == (int)strlen(result) + 1, "must match");
 366   return result;
 367 }
 368 
 369 unsigned int java_lang_String::hash_string(oop java_string) {
 370   int          length = java_lang_String::length(java_string);
 371   // Zero length string doesn't hash necessarily hash to zero.
 372   if (length == 0) {
 373     return StringTable::hash_string(NULL, 0);
 374   }
 375 
 376   typeArrayOop value  = java_lang_String::value(java_string);
 377   int          offset = java_lang_String::offset(java_string);
 378   return StringTable::hash_string(value->char_at_addr(offset), length);
 379 }
 380 
 381 Symbol* java_lang_String::as_symbol(Handle java_string, TRAPS) {
 382   oop          obj    = java_string();
 383   typeArrayOop value  = java_lang_String::value(obj);
 384   int          offset = java_lang_String::offset(obj);
 385   int          length = java_lang_String::length(obj);
 386   jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
 387   Symbol* sym = SymbolTable::lookup_unicode(base, length, THREAD);
 388   return sym;
 389 }
 390 
 391 Symbol* java_lang_String::as_symbol_or_null(oop java_string) {
 392   typeArrayOop value  = java_lang_String::value(java_string);
 393   int          offset = java_lang_String::offset(java_string);
 394   int          length = java_lang_String::length(java_string);
 395   jchar* base = (length == 0) ? NULL : value->char_at_addr(offset);
 396   return SymbolTable::probe_unicode(base, length);
 397 }
 398 
 399 
 400 int java_lang_String::utf8_length(oop java_string) {
 401   typeArrayOop value  = java_lang_String::value(java_string);
 402   int          offset = java_lang_String::offset(java_string);
 403   int          length = java_lang_String::length(java_string);
 404   jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
 405   return UNICODE::utf8_length(position, length);
 406 }
 407 
 408 char* java_lang_String::as_utf8_string(oop java_string) {
 409   typeArrayOop value  = java_lang_String::value(java_string);
 410   int          offset = java_lang_String::offset(java_string);
 411   int          length = java_lang_String::length(java_string);
 412   jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
 413   return UNICODE::as_utf8(position, length);
 414 }
 415 
 416 char* java_lang_String::as_utf8_string(oop java_string, char* buf, int buflen) {
 417   typeArrayOop value  = java_lang_String::value(java_string);
 418   int          offset = java_lang_String::offset(java_string);
 419   int          length = java_lang_String::length(java_string);
 420   jchar* position = (length == 0) ? NULL : value->char_at_addr(offset);
 421   return UNICODE::as_utf8(position, length, buf, buflen);
 422 }
 423 
 424 char* java_lang_String::as_utf8_string(oop java_string, int start, int len) {
 425   typeArrayOop value  = java_lang_String::value(java_string);
 426   int          offset = java_lang_String::offset(java_string);
 427   int          length = java_lang_String::length(java_string);
 428   assert(start + len <= length, "just checking");
 429   jchar* position = value->char_at_addr(offset + start);
 430   return UNICODE::as_utf8(position, len);
 431 }
 432 
 433 char* java_lang_String::as_utf8_string(oop java_string, int start, int len, char* buf, int buflen) {
 434   typeArrayOop value  = java_lang_String::value(java_string);
 435   int          offset = java_lang_String::offset(java_string);
 436   int          length = java_lang_String::length(java_string);
 437   assert(start + len <= length, "just checking");
 438   jchar* position = value->char_at_addr(offset + start);
 439   return UNICODE::as_utf8(position, len, buf, buflen);
 440 }
 441 
 442 bool java_lang_String::equals(oop java_string, jchar* chars, int len) {
 443   assert(java_string->klass() == SystemDictionary::String_klass(),
 444          "must be java_string");
 445   typeArrayOop value  = java_lang_String::value(java_string);
 446   int          offset = java_lang_String::offset(java_string);
 447   int          length = java_lang_String::length(java_string);
 448   if (length != len) {
 449     return false;
 450   }
 451   for (int i = 0; i < len; i++) {
 452     if (value->char_at(i + offset) != chars[i]) {
 453       return false;
 454     }
 455   }
 456   return true;
 457 }
 458 
 459 bool java_lang_String::equals(oop str1, oop str2) {
 460   assert(str1->klass() == SystemDictionary::String_klass(),
 461          "must be java String");
 462   assert(str2->klass() == SystemDictionary::String_klass(),
 463          "must be java String");
 464   typeArrayOop value1  = java_lang_String::value(str1);
 465   int          offset1 = java_lang_String::offset(str1);
 466   int          length1 = java_lang_String::length(str1);
 467   typeArrayOop value2  = java_lang_String::value(str2);
 468   int          offset2 = java_lang_String::offset(str2);
 469   int          length2 = java_lang_String::length(str2);
 470 
 471   if (length1 != length2) {
 472     return false;
 473   }
 474   for (int i = 0; i < length1; i++) {
 475     if (value1->char_at(i + offset1) != value2->char_at(i + offset2)) {
 476       return false;
 477     }
 478   }
 479   return true;
 480 }
 481 
 482 void java_lang_String::print(oop java_string, outputStream* st) {
 483   assert(java_string->klass() == SystemDictionary::String_klass(), "must be java_string");
 484   typeArrayOop value  = java_lang_String::value(java_string);
 485 
 486   if (value == NULL) {
 487     // This can happen if, e.g., printing a String
 488     // object before its initializer has been called
 489     st->print("NULL");
 490     return;
 491   }
 492 
 493   int offset = java_lang_String::offset(java_string);
 494   int length = java_lang_String::length(java_string);
 495 
 496   st->print("\"");
 497   for (int index = 0; index < length; index++) {
 498     st->print("%c", value->char_at(index + offset));
 499   }
 500   st->print("\"");
 501 }
 502 
 503 
 504 static void initialize_static_field(fieldDescriptor* fd, Handle mirror, TRAPS) {
 505   assert(mirror.not_null() && fd->is_static(), "just checking");
 506   if (fd->has_initial_value()) {
 507     BasicType t = fd->field_type();
 508     switch (t) {
 509       case T_BYTE:
 510         mirror()->byte_field_put(fd->offset(), fd->int_initial_value());
 511               break;
 512       case T_BOOLEAN:
 513         mirror()->bool_field_put(fd->offset(), fd->int_initial_value());
 514               break;
 515       case T_CHAR:
 516         mirror()->char_field_put(fd->offset(), fd->int_initial_value());
 517               break;
 518       case T_SHORT:
 519         mirror()->short_field_put(fd->offset(), fd->int_initial_value());
 520               break;
 521       case T_INT:
 522         mirror()->int_field_put(fd->offset(), fd->int_initial_value());
 523         break;
 524       case T_FLOAT:
 525         mirror()->float_field_put(fd->offset(), fd->float_initial_value());
 526         break;
 527       case T_DOUBLE:
 528         mirror()->double_field_put(fd->offset(), fd->double_initial_value());
 529         break;
 530       case T_LONG:
 531         mirror()->long_field_put(fd->offset(), fd->long_initial_value());
 532         break;
 533       case T_OBJECT:
 534         {
 535           #ifdef ASSERT
 536           TempNewSymbol sym = SymbolTable::new_symbol("Ljava/lang/String;", CHECK);
 537           assert(fd->signature() == sym, "just checking");
 538           #endif
 539           oop string = fd->string_initial_value(CHECK);
 540           mirror()->obj_field_put(fd->offset(), string);
 541         }
 542         break;
 543       default:
 544         THROW_MSG(vmSymbols::java_lang_ClassFormatError(),
 545                   "Illegal ConstantValue attribute in class file");
 546     }
 547   }
 548 }
 549 
 550 
 551 void java_lang_Class::fixup_mirror(KlassHandle k, TRAPS) {
 552   assert(InstanceMirrorKlass::offset_of_static_fields() != 0, "must have been computed already");
 553 
 554   // If the offset was read from the shared archive, it was fixed up already
 555   if (!k->is_shared()) {
 556     if (k->oop_is_instance()) {
 557       // During bootstrap, java.lang.Class wasn't loaded so static field
 558       // offsets were computed without the size added it.  Go back and
 559       // update all the static field offsets to included the size.
 560         for (JavaFieldStream fs(InstanceKlass::cast(k())); !fs.done(); fs.next()) {
 561         if (fs.access_flags().is_static()) {
 562           int real_offset = fs.offset() + InstanceMirrorKlass::offset_of_static_fields();
 563           fs.set_offset(real_offset);
 564         }
 565       }
 566     }
 567   }
 568   create_mirror(k, Handle(NULL), Handle(NULL), CHECK);
 569 }
 570 
 571 void java_lang_Class::initialize_mirror_fields(KlassHandle k,
 572                                                Handle mirror,
 573                                                Handle protection_domain,
 574                                                TRAPS) {
 575   // Allocate a simple java object for a lock.
 576   // This needs to be a java object because during class initialization
 577   // it can be held across a java call.
 578   typeArrayOop r = oopFactory::new_typeArray(T_INT, 0, CHECK);
 579   set_init_lock(mirror(), r);
 580 
 581   // Set protection domain also
 582   set_protection_domain(mirror(), protection_domain());
 583 
 584   // Initialize static fields
 585   InstanceKlass::cast(k())->do_local_static_fields(&initialize_static_field, mirror, CHECK);
 586 }
 587 
 588 void java_lang_Class::create_mirror(KlassHandle k, Handle class_loader,
 589                                     Handle protection_domain, TRAPS) {
 590   assert(k->java_mirror() == NULL, "should only assign mirror once");
 591   // Use this moment of initialization to cache modifier_flags also,
 592   // to support Class.getModifiers().  Instance classes recalculate
 593   // the cached flags after the class file is parsed, but before the
 594   // class is put into the system dictionary.
 595   int computed_modifiers = k->compute_modifier_flags(CHECK);
 596   k->set_modifier_flags(computed_modifiers);
 597   // Class_klass has to be loaded because it is used to allocate
 598   // the mirror.
 599   if (SystemDictionary::Class_klass_loaded()) {
 600     // Allocate mirror (java.lang.Class instance)
 601     Handle mirror = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(k, CHECK);
 602 
 603     // Setup indirection from mirror->klass
 604     if (!k.is_null()) {
 605       java_lang_Class::set_klass(mirror(), k());
 606     }
 607 
 608     InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(mirror->klass());
 609     assert(oop_size(mirror()) == mk->instance_size(k), "should have been set");
 610 
 611     java_lang_Class::set_static_oop_field_count(mirror(), mk->compute_static_oop_field_count(mirror()));
 612 
 613     // It might also have a component mirror.  This mirror must already exist.
 614     if (k->oop_is_array()) {
 615       Handle comp_mirror;
 616       if (k->oop_is_typeArray()) {
 617         BasicType type = TypeArrayKlass::cast(k())->element_type();
 618         comp_mirror = Universe::java_mirror(type);
 619       } else {
 620         assert(k->oop_is_objArray(), "Must be");
 621         Klass* element_klass = ObjArrayKlass::cast(k())->element_klass();
 622         assert(element_klass != NULL, "Must have an element klass");
 623         comp_mirror = element_klass->java_mirror();
 624       }
 625       assert(comp_mirror.not_null(), "must have a mirror");
 626 
 627       // Two-way link between the array klass and its component mirror:
 628       // (array_klass) k -> mirror -> component_mirror -> array_klass -> k
 629       set_component_mirror(mirror(), comp_mirror());
 630       set_array_klass(comp_mirror(), k());
 631     } else {
 632       assert(k->oop_is_instance(), "Must be");
 633 
 634       initialize_mirror_fields(k, mirror, protection_domain, THREAD);
 635       if (HAS_PENDING_EXCEPTION) {
 636         // If any of the fields throws an exception like OOM remove the klass field
 637         // from the mirror so GC doesn't follow it after the klass has been deallocated.
 638         // This mirror looks like a primitive type, which logically it is because it
 639         // it represents no class.
 640         java_lang_Class::set_klass(mirror(), NULL);
 641         return;
 642       }
 643     }
 644 
 645     // set the classLoader field in the java_lang_Class instance
 646     assert(class_loader() == k->class_loader(), "should be same");
 647     set_class_loader(mirror(), class_loader());
 648 
 649     // Setup indirection from klass->mirror last
 650     // after any exceptions can happen during allocations.
 651     if (!k.is_null()) {
 652       k->set_java_mirror(mirror());
 653     }
 654   } else {
 655     if (fixup_mirror_list() == NULL) {
 656       GrowableArray<Klass*>* list =
 657        new (ResourceObj::C_HEAP, mtClass) GrowableArray<Klass*>(40, true);
 658       set_fixup_mirror_list(list);
 659     }
 660     fixup_mirror_list()->push(k());
 661   }
 662 }
 663 
 664 
 665 int  java_lang_Class::oop_size(oop java_class) {
 666   assert(_oop_size_offset != 0, "must be set");
 667   return java_class->int_field(_oop_size_offset);
 668 }
 669 void java_lang_Class::set_oop_size(oop java_class, int size) {
 670   assert(_oop_size_offset != 0, "must be set");
 671   java_class->int_field_put(_oop_size_offset, size);
 672 }
 673 int  java_lang_Class::static_oop_field_count(oop java_class) {
 674   assert(_static_oop_field_count_offset != 0, "must be set");
 675   return java_class->int_field(_static_oop_field_count_offset);
 676 }
 677 void java_lang_Class::set_static_oop_field_count(oop java_class, int size) {
 678   assert(_static_oop_field_count_offset != 0, "must be set");
 679   java_class->int_field_put(_static_oop_field_count_offset, size);
 680 }
 681 
 682 oop java_lang_Class::protection_domain(oop java_class) {
 683   assert(_protection_domain_offset != 0, "must be set");
 684   return java_class->obj_field(_protection_domain_offset);
 685 }
 686 void java_lang_Class::set_protection_domain(oop java_class, oop pd) {
 687   assert(_protection_domain_offset != 0, "must be set");
 688   java_class->obj_field_put(_protection_domain_offset, pd);
 689 }
 690 
 691 void java_lang_Class::set_component_mirror(oop java_class, oop comp_mirror) {
 692   assert(_component_mirror_offset != 0, "must be set");
 693     java_class->obj_field_put(_component_mirror_offset, comp_mirror);
 694   }
 695 oop java_lang_Class::component_mirror(oop java_class) {
 696   assert(_component_mirror_offset != 0, "must be set");
 697   return java_class->obj_field(_component_mirror_offset);
 698 }
 699 
 700 oop java_lang_Class::init_lock(oop java_class) {
 701   assert(_init_lock_offset != 0, "must be set");
 702   return java_class->obj_field(_init_lock_offset);
 703 }
 704 void java_lang_Class::set_init_lock(oop java_class, oop init_lock) {
 705   assert(_init_lock_offset != 0, "must be set");
 706   java_class->obj_field_put(_init_lock_offset, init_lock);
 707 }
 708 
 709 objArrayOop java_lang_Class::signers(oop java_class) {
 710   assert(_signers_offset != 0, "must be set");
 711   return (objArrayOop)java_class->obj_field(_signers_offset);
 712 }
 713 void java_lang_Class::set_signers(oop java_class, objArrayOop signers) {
 714   assert(_signers_offset != 0, "must be set");
 715   java_class->obj_field_put(_signers_offset, (oop)signers);
 716 }
 717 
 718 
 719 void java_lang_Class::set_class_loader(oop java_class, oop loader) {
 720   // jdk7 runs Queens in bootstrapping and jdk8-9 has no coordinated pushes yet.
 721   if (_class_loader_offset != 0) {
 722     java_class->obj_field_put(_class_loader_offset, loader);
 723   }
 724 }
 725 
 726 oop java_lang_Class::class_loader(oop java_class) {
 727   assert(_class_loader_offset != 0, "must be set");
 728   return java_class->obj_field(_class_loader_offset);
 729 }
 730 
 731 oop java_lang_Class::create_basic_type_mirror(const char* basic_type_name, BasicType type, TRAPS) {
 732   // This should be improved by adding a field at the Java level or by
 733   // introducing a new VM klass (see comment in ClassFileParser)
 734   oop java_class = InstanceMirrorKlass::cast(SystemDictionary::Class_klass())->allocate_instance(NULL, CHECK_0);
 735   if (type != T_VOID) {
 736     Klass* aklass = Universe::typeArrayKlassObj(type);
 737     assert(aklass != NULL, "correct bootstrap");
 738     set_array_klass(java_class, aklass);
 739   }
 740 #ifdef ASSERT
 741   InstanceMirrorKlass* mk = InstanceMirrorKlass::cast(SystemDictionary::Class_klass());
 742   assert(java_lang_Class::static_oop_field_count(java_class) == 0, "should have been zeroed by allocation");
 743 #endif
 744   return java_class;
 745 }
 746 
 747 
 748 Klass* java_lang_Class::as_Klass(oop java_class) {
 749   //%note memory_2
 750   assert(java_lang_Class::is_instance(java_class), "must be a Class object");
 751   Klass* k = ((Klass*)java_class->metadata_field(_klass_offset));
 752   assert(k == NULL || k->is_klass(), "type check");
 753   return k;
 754 }
 755 
 756 
 757 void java_lang_Class::set_klass(oop java_class, Klass* klass) {
 758   assert(java_lang_Class::is_instance(java_class), "must be a Class object");
 759   java_class->metadata_field_put(_klass_offset, klass);
 760 }
 761 
 762 
 763 void java_lang_Class::print_signature(oop java_class, outputStream* st) {
 764   assert(java_lang_Class::is_instance(java_class), "must be a Class object");
 765   Symbol* name = NULL;
 766   bool is_instance = false;
 767   if (is_primitive(java_class)) {
 768     name = vmSymbols::type_signature(primitive_type(java_class));
 769   } else {
 770     Klass* k = as_Klass(java_class);
 771     is_instance = k->oop_is_instance();
 772     name = k->name();
 773   }
 774   if (name == NULL) {
 775     st->print("<null>");
 776     return;
 777   }
 778   if (is_instance)  st->print("L");
 779   st->write((char*) name->base(), (int) name->utf8_length());
 780   if (is_instance)  st->print(";");
 781 }
 782 
 783 Symbol* java_lang_Class::as_signature(oop java_class, bool intern_if_not_found, TRAPS) {
 784   assert(java_lang_Class::is_instance(java_class), "must be a Class object");
 785   Symbol* name;
 786   if (is_primitive(java_class)) {
 787     name = vmSymbols::type_signature(primitive_type(java_class));
 788     // Because this can create a new symbol, the caller has to decrement
 789     // the refcount, so make adjustment here and below for symbols returned
 790     // that are not created or incremented due to a successful lookup.
 791     name->increment_refcount();
 792   } else {
 793     Klass* k = as_Klass(java_class);
 794     if (!k->oop_is_instance()) {
 795       name = k->name();
 796       name->increment_refcount();
 797     } else {
 798       ResourceMark rm;
 799       const char* sigstr = k->signature_name();
 800       int         siglen = (int) strlen(sigstr);
 801       if (!intern_if_not_found) {
 802         name = SymbolTable::probe(sigstr, siglen);
 803       } else {
 804         name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
 805       }
 806     }
 807   }
 808   return name;
 809 }
 810 
 811 // Returns the Java name for this Java mirror (Resource allocated)
 812 // See Klass::external_name().
 813 // For primitive type Java mirrors, its type name is returned.
 814 const char* java_lang_Class::as_external_name(oop java_class) {
 815   assert(java_lang_Class::is_instance(java_class), "must be a Class object");
 816   const char* name = NULL;
 817   if (is_primitive(java_class)) {
 818     name = type2name(primitive_type(java_class));
 819   } else {
 820     name = as_Klass(java_class)->external_name();
 821   }
 822   if (name == NULL) {
 823     name = "<null>";
 824   }
 825   return name;
 826 }
 827 
 828 Klass* java_lang_Class::array_klass(oop java_class) {
 829   Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
 830   assert(k == NULL || k->is_klass() && k->oop_is_array(), "should be array klass");
 831   return k;
 832 }
 833 
 834 
 835 void java_lang_Class::set_array_klass(oop java_class, Klass* klass) {
 836   assert(klass->is_klass() && klass->oop_is_array(), "should be array klass");
 837   java_class->metadata_field_put(_array_klass_offset, klass);
 838 }
 839 
 840 
 841 bool java_lang_Class::is_primitive(oop java_class) {
 842   // should assert:
 843   //assert(java_lang_Class::is_instance(java_class), "must be a Class object");
 844   bool is_primitive = (java_class->metadata_field(_klass_offset) == NULL);
 845 
 846 #ifdef ASSERT
 847   if (is_primitive) {
 848     Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
 849     assert(k == NULL || is_java_primitive(ArrayKlass::cast(k)->element_type()),
 850         "Should be either the T_VOID primitive or a java primitive");
 851   }
 852 #endif
 853 
 854   return is_primitive;
 855 }
 856 
 857 
 858 BasicType java_lang_Class::primitive_type(oop java_class) {
 859   assert(java_lang_Class::is_primitive(java_class), "just checking");
 860   Klass* ak = ((Klass*)java_class->metadata_field(_array_klass_offset));
 861   BasicType type = T_VOID;
 862   if (ak != NULL) {
 863     // Note: create_basic_type_mirror above initializes ak to a non-null value.
 864     type = ArrayKlass::cast(ak)->element_type();
 865   } else {
 866     assert(java_class == Universe::void_mirror(), "only valid non-array primitive");
 867   }
 868   assert(Universe::java_mirror(type) == java_class, "must be consistent");
 869   return type;
 870 }
 871 
 872 BasicType java_lang_Class::as_BasicType(oop java_class, Klass** reference_klass) {
 873   assert(java_lang_Class::is_instance(java_class), "must be a Class object");
 874   if (is_primitive(java_class)) {
 875     if (reference_klass != NULL)
 876       (*reference_klass) = NULL;
 877     return primitive_type(java_class);
 878   } else {
 879     if (reference_klass != NULL)
 880       (*reference_klass) = as_Klass(java_class);
 881     return T_OBJECT;
 882   }
 883 }
 884 
 885 
 886 oop java_lang_Class::primitive_mirror(BasicType t) {
 887   oop mirror = Universe::java_mirror(t);
 888   assert(mirror != NULL && mirror->is_a(SystemDictionary::Class_klass()), "must be a Class");
 889   assert(java_lang_Class::is_primitive(mirror), "must be primitive");
 890   return mirror;
 891 }
 892 
 893 bool java_lang_Class::offsets_computed = false;
 894 int  java_lang_Class::classRedefinedCount_offset = -1;
 895 
 896 void java_lang_Class::compute_offsets() {
 897   assert(!offsets_computed, "offsets should be initialized only once");
 898   offsets_computed = true;
 899 
 900   Klass* k = SystemDictionary::Class_klass();
 901   // The classRedefinedCount field is only present starting in 1.5,
 902   // so don't go fatal.
 903   compute_optional_offset(classRedefinedCount_offset,
 904                           k, vmSymbols::classRedefinedCount_name(), vmSymbols::int_signature());
 905 
 906   // Needs to be optional because the old build runs Queens during bootstrapping
 907   // and jdk8-9 doesn't have coordinated pushes yet.
 908   compute_optional_offset(_class_loader_offset,
 909                  k, vmSymbols::classLoader_name(),
 910                  vmSymbols::classloader_signature());
 911 
 912   compute_offset(_component_mirror_offset,
 913                  k, vmSymbols::componentType_name(),
 914                  vmSymbols::class_signature());
 915 
 916   // Init lock is a C union with component_mirror.  Only instanceKlass mirrors have
 917   // init_lock and only ArrayKlass mirrors have component_mirror.  Since both are oops
 918   // GC treats them the same.
 919   _init_lock_offset = _component_mirror_offset;
 920 
 921   CLASS_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
 922 }
 923 
 924 int java_lang_Class::classRedefinedCount(oop the_class_mirror) {
 925   if (classRedefinedCount_offset == -1) {
 926     // If we don't have an offset for it then just return -1 as a marker.
 927     return -1;
 928   }
 929 
 930   return the_class_mirror->int_field(classRedefinedCount_offset);
 931 }
 932 
 933 void java_lang_Class::set_classRedefinedCount(oop the_class_mirror, int value) {
 934   if (classRedefinedCount_offset == -1) {
 935     // If we don't have an offset for it then nothing to set.
 936     return;
 937   }
 938 
 939   the_class_mirror->int_field_put(classRedefinedCount_offset, value);
 940 }
 941 
 942 
 943 // Note: JDK1.1 and before had a privateInfo_offset field which was used for the
 944 //       platform thread structure, and a eetop offset which was used for thread
 945 //       local storage (and unused by the HotSpot VM). In JDK1.2 the two structures
 946 //       merged, so in the HotSpot VM we just use the eetop field for the thread
 947 //       instead of the privateInfo_offset.
 948 //
 949 // Note: The stackSize field is only present starting in 1.4.
 950 
 951 int java_lang_Thread::_name_offset = 0;
 952 int java_lang_Thread::_group_offset = 0;
 953 int java_lang_Thread::_contextClassLoader_offset = 0;
 954 int java_lang_Thread::_inheritedAccessControlContext_offset = 0;
 955 int java_lang_Thread::_priority_offset = 0;
 956 int java_lang_Thread::_eetop_offset = 0;
 957 int java_lang_Thread::_daemon_offset = 0;
 958 int java_lang_Thread::_stillborn_offset = 0;
 959 int java_lang_Thread::_stackSize_offset = 0;
 960 int java_lang_Thread::_tid_offset = 0;
 961 int java_lang_Thread::_thread_status_offset = 0;
 962 int java_lang_Thread::_park_blocker_offset = 0;
 963 int java_lang_Thread::_park_event_offset = 0 ;
 964 
 965 
 966 void java_lang_Thread::compute_offsets() {
 967   assert(_group_offset == 0, "offsets should be initialized only once");
 968 
 969   Klass* k = SystemDictionary::Thread_klass();
 970   compute_offset(_name_offset,      k, vmSymbols::name_name(),      vmSymbols::string_signature());
 971   compute_offset(_group_offset,     k, vmSymbols::group_name(),     vmSymbols::threadgroup_signature());
 972   compute_offset(_contextClassLoader_offset, k, vmSymbols::contextClassLoader_name(), vmSymbols::classloader_signature());
 973   compute_offset(_inheritedAccessControlContext_offset, k, vmSymbols::inheritedAccessControlContext_name(), vmSymbols::accesscontrolcontext_signature());
 974   compute_offset(_priority_offset,  k, vmSymbols::priority_name(),  vmSymbols::int_signature());
 975   compute_offset(_daemon_offset,    k, vmSymbols::daemon_name(),    vmSymbols::bool_signature());
 976   compute_offset(_eetop_offset,     k, vmSymbols::eetop_name(),     vmSymbols::long_signature());
 977   compute_offset(_stillborn_offset, k, vmSymbols::stillborn_name(), vmSymbols::bool_signature());
 978   // The stackSize field is only present starting in 1.4, so don't go fatal.
 979   compute_optional_offset(_stackSize_offset, k, vmSymbols::stackSize_name(), vmSymbols::long_signature());
 980   // The tid and thread_status fields are only present starting in 1.5, so don't go fatal.
 981   compute_optional_offset(_tid_offset, k, vmSymbols::thread_id_name(), vmSymbols::long_signature());
 982   compute_optional_offset(_thread_status_offset, k, vmSymbols::thread_status_name(), vmSymbols::int_signature());
 983   // The parkBlocker field is only present starting in 1.6, so don't go fatal.
 984   compute_optional_offset(_park_blocker_offset, k, vmSymbols::park_blocker_name(), vmSymbols::object_signature());
 985   compute_optional_offset(_park_event_offset, k, vmSymbols::park_event_name(),
 986  vmSymbols::long_signature());
 987 }
 988 
 989 
 990 JavaThread* java_lang_Thread::thread(oop java_thread) {
 991   return (JavaThread*)java_thread->address_field(_eetop_offset);
 992 }
 993 
 994 
 995 void java_lang_Thread::set_thread(oop java_thread, JavaThread* thread) {
 996   java_thread->address_field_put(_eetop_offset, (address)thread);
 997 }
 998 
 999 
1000 oop java_lang_Thread::name(oop java_thread) {
1001   return java_thread->obj_field(_name_offset);
1002 }
1003 
1004 
1005 void java_lang_Thread::set_name(oop java_thread, oop name) {
1006   java_thread->obj_field_put(_name_offset, name);
1007 }
1008 
1009 
1010 ThreadPriority java_lang_Thread::priority(oop java_thread) {
1011   return (ThreadPriority)java_thread->int_field(_priority_offset);
1012 }
1013 
1014 
1015 void java_lang_Thread::set_priority(oop java_thread, ThreadPriority priority) {
1016   java_thread->int_field_put(_priority_offset, priority);
1017 }
1018 
1019 
1020 oop java_lang_Thread::threadGroup(oop java_thread) {
1021   return java_thread->obj_field(_group_offset);
1022 }
1023 
1024 
1025 bool java_lang_Thread::is_stillborn(oop java_thread) {
1026   return java_thread->bool_field(_stillborn_offset) != 0;
1027 }
1028 
1029 
1030 // We never have reason to turn the stillborn bit off
1031 void java_lang_Thread::set_stillborn(oop java_thread) {
1032   java_thread->bool_field_put(_stillborn_offset, true);
1033 }
1034 
1035 
1036 bool java_lang_Thread::is_alive(oop java_thread) {
1037   JavaThread* thr = java_lang_Thread::thread(java_thread);
1038   return (thr != NULL);
1039 }
1040 
1041 
1042 bool java_lang_Thread::is_daemon(oop java_thread) {
1043   return java_thread->bool_field(_daemon_offset) != 0;
1044 }
1045 
1046 
1047 void java_lang_Thread::set_daemon(oop java_thread) {
1048   java_thread->bool_field_put(_daemon_offset, true);
1049 }
1050 
1051 oop java_lang_Thread::context_class_loader(oop java_thread) {
1052   return java_thread->obj_field(_contextClassLoader_offset);
1053 }
1054 
1055 oop java_lang_Thread::inherited_access_control_context(oop java_thread) {
1056   return java_thread->obj_field(_inheritedAccessControlContext_offset);
1057 }
1058 
1059 
1060 jlong java_lang_Thread::stackSize(oop java_thread) {
1061   if (_stackSize_offset > 0) {
1062     return java_thread->long_field(_stackSize_offset);
1063   } else {
1064     return 0;
1065   }
1066 }
1067 
1068 // Write the thread status value to threadStatus field in java.lang.Thread java class.
1069 void java_lang_Thread::set_thread_status(oop java_thread,
1070                                          java_lang_Thread::ThreadStatus status) {
1071   // The threadStatus is only present starting in 1.5
1072   if (_thread_status_offset > 0) {
1073     java_thread->int_field_put(_thread_status_offset, status);
1074   }
1075 }
1076 
1077 // Read thread status value from threadStatus field in java.lang.Thread java class.
1078 java_lang_Thread::ThreadStatus java_lang_Thread::get_thread_status(oop java_thread) {
1079   assert(Thread::current()->is_Watcher_thread() || Thread::current()->is_VM_thread() ||
1080          JavaThread::current()->thread_state() == _thread_in_vm,
1081          "Java Thread is not running in vm");
1082   // The threadStatus is only present starting in 1.5
1083   if (_thread_status_offset > 0) {
1084     return (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1085   } else {
1086     // All we can easily figure out is if it is alive, but that is
1087     // enough info for a valid unknown status.
1088     // These aren't restricted to valid set ThreadStatus values, so
1089     // use JVMTI values and cast.
1090     JavaThread* thr = java_lang_Thread::thread(java_thread);
1091     if (thr == NULL) {
1092       // the thread hasn't run yet or is in the process of exiting
1093       return NEW;
1094     }
1095     return (java_lang_Thread::ThreadStatus)JVMTI_THREAD_STATE_ALIVE;
1096   }
1097 }
1098 
1099 
1100 jlong java_lang_Thread::thread_id(oop java_thread) {
1101   // The thread ID field is only present starting in 1.5
1102   if (_tid_offset > 0) {
1103     return java_thread->long_field(_tid_offset);
1104   } else {
1105     return 0;
1106   }
1107 }
1108 
1109 oop java_lang_Thread::park_blocker(oop java_thread) {
1110   assert(JDK_Version::current().supports_thread_park_blocker() &&
1111          _park_blocker_offset != 0, "Must support parkBlocker field");
1112 
1113   if (_park_blocker_offset > 0) {
1114     return java_thread->obj_field(_park_blocker_offset);
1115   }
1116 
1117   return NULL;
1118 }
1119 
1120 jlong java_lang_Thread::park_event(oop java_thread) {
1121   if (_park_event_offset > 0) {
1122     return java_thread->long_field(_park_event_offset);
1123   }
1124   return 0;
1125 }
1126 
1127 bool java_lang_Thread::set_park_event(oop java_thread, jlong ptr) {
1128   if (_park_event_offset > 0) {
1129     java_thread->long_field_put(_park_event_offset, ptr);
1130     return true;
1131   }
1132   return false;
1133 }
1134 
1135 
1136 const char* java_lang_Thread::thread_status_name(oop java_thread) {
1137   assert(_thread_status_offset != 0, "Must have thread status");
1138   ThreadStatus status = (java_lang_Thread::ThreadStatus)java_thread->int_field(_thread_status_offset);
1139   switch (status) {
1140     case NEW                      : return "NEW";
1141     case RUNNABLE                 : return "RUNNABLE";
1142     case SLEEPING                 : return "TIMED_WAITING (sleeping)";
1143     case IN_OBJECT_WAIT           : return "WAITING (on object monitor)";
1144     case IN_OBJECT_WAIT_TIMED     : return "TIMED_WAITING (on object monitor)";
1145     case PARKED                   : return "WAITING (parking)";
1146     case PARKED_TIMED             : return "TIMED_WAITING (parking)";
1147     case BLOCKED_ON_MONITOR_ENTER : return "BLOCKED (on object monitor)";
1148     case TERMINATED               : return "TERMINATED";
1149     default                       : return "UNKNOWN";
1150   };
1151 }
1152 int java_lang_ThreadGroup::_parent_offset = 0;
1153 int java_lang_ThreadGroup::_name_offset = 0;
1154 int java_lang_ThreadGroup::_threads_offset = 0;
1155 int java_lang_ThreadGroup::_groups_offset = 0;
1156 int java_lang_ThreadGroup::_maxPriority_offset = 0;
1157 int java_lang_ThreadGroup::_destroyed_offset = 0;
1158 int java_lang_ThreadGroup::_daemon_offset = 0;
1159 int java_lang_ThreadGroup::_vmAllowSuspension_offset = 0;
1160 int java_lang_ThreadGroup::_nthreads_offset = 0;
1161 int java_lang_ThreadGroup::_ngroups_offset = 0;
1162 
1163 oop  java_lang_ThreadGroup::parent(oop java_thread_group) {
1164   assert(java_thread_group->is_oop(), "thread group must be oop");
1165   return java_thread_group->obj_field(_parent_offset);
1166 }
1167 
1168 // ("name as oop" accessor is not necessary)
1169 
1170 typeArrayOop java_lang_ThreadGroup::name(oop java_thread_group) {
1171   oop name = java_thread_group->obj_field(_name_offset);
1172   // ThreadGroup.name can be null
1173   return name == NULL ? (typeArrayOop)NULL : java_lang_String::value(name);
1174 }
1175 
1176 int java_lang_ThreadGroup::nthreads(oop java_thread_group) {
1177   assert(java_thread_group->is_oop(), "thread group must be oop");
1178   return java_thread_group->int_field(_nthreads_offset);
1179 }
1180 
1181 objArrayOop java_lang_ThreadGroup::threads(oop java_thread_group) {
1182   oop threads = java_thread_group->obj_field(_threads_offset);
1183   assert(threads != NULL, "threadgroups should have threads");
1184   assert(threads->is_objArray(), "just checking"); // Todo: Add better type checking code
1185   return objArrayOop(threads);
1186 }
1187 
1188 int java_lang_ThreadGroup::ngroups(oop java_thread_group) {
1189   assert(java_thread_group->is_oop(), "thread group must be oop");
1190   return java_thread_group->int_field(_ngroups_offset);
1191 }
1192 
1193 objArrayOop java_lang_ThreadGroup::groups(oop java_thread_group) {
1194   oop groups = java_thread_group->obj_field(_groups_offset);
1195   assert(groups == NULL || groups->is_objArray(), "just checking"); // Todo: Add better type checking code
1196   return objArrayOop(groups);
1197 }
1198 
1199 ThreadPriority java_lang_ThreadGroup::maxPriority(oop java_thread_group) {
1200   assert(java_thread_group->is_oop(), "thread group must be oop");
1201   return (ThreadPriority) java_thread_group->int_field(_maxPriority_offset);
1202 }
1203 
1204 bool java_lang_ThreadGroup::is_destroyed(oop java_thread_group) {
1205   assert(java_thread_group->is_oop(), "thread group must be oop");
1206   return java_thread_group->bool_field(_destroyed_offset) != 0;
1207 }
1208 
1209 bool java_lang_ThreadGroup::is_daemon(oop java_thread_group) {
1210   assert(java_thread_group->is_oop(), "thread group must be oop");
1211   return java_thread_group->bool_field(_daemon_offset) != 0;
1212 }
1213 
1214 bool java_lang_ThreadGroup::is_vmAllowSuspension(oop java_thread_group) {
1215   assert(java_thread_group->is_oop(), "thread group must be oop");
1216   return java_thread_group->bool_field(_vmAllowSuspension_offset) != 0;
1217 }
1218 
1219 void java_lang_ThreadGroup::compute_offsets() {
1220   assert(_parent_offset == 0, "offsets should be initialized only once");
1221 
1222   Klass* k = SystemDictionary::ThreadGroup_klass();
1223 
1224   compute_offset(_parent_offset,      k, vmSymbols::parent_name(),      vmSymbols::threadgroup_signature());
1225   compute_offset(_name_offset,        k, vmSymbols::name_name(),        vmSymbols::string_signature());
1226   compute_offset(_threads_offset,     k, vmSymbols::threads_name(),     vmSymbols::thread_array_signature());
1227   compute_offset(_groups_offset,      k, vmSymbols::groups_name(),      vmSymbols::threadgroup_array_signature());
1228   compute_offset(_maxPriority_offset, k, vmSymbols::maxPriority_name(), vmSymbols::int_signature());
1229   compute_offset(_destroyed_offset,   k, vmSymbols::destroyed_name(),   vmSymbols::bool_signature());
1230   compute_offset(_daemon_offset,      k, vmSymbols::daemon_name(),      vmSymbols::bool_signature());
1231   compute_offset(_vmAllowSuspension_offset, k, vmSymbols::vmAllowSuspension_name(), vmSymbols::bool_signature());
1232   compute_offset(_nthreads_offset,    k, vmSymbols::nthreads_name(),    vmSymbols::int_signature());
1233   compute_offset(_ngroups_offset,     k, vmSymbols::ngroups_name(),     vmSymbols::int_signature());
1234 }
1235 
1236 oop java_lang_Throwable::unassigned_stacktrace() {
1237   InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Throwable_klass());
1238   address addr = ik->static_field_addr(static_unassigned_stacktrace_offset);
1239   if (UseCompressedOops) {
1240     return oopDesc::load_decode_heap_oop((narrowOop *)addr);
1241   } else {
1242     return oopDesc::load_decode_heap_oop((oop*)addr);
1243   }
1244 }
1245 
1246 oop java_lang_Throwable::backtrace(oop throwable) {
1247   return throwable->obj_field_acquire(backtrace_offset);
1248 }
1249 
1250 
1251 void java_lang_Throwable::set_backtrace(oop throwable, oop value) {
1252   throwable->release_obj_field_put(backtrace_offset, value);
1253 }
1254 
1255 
1256 oop java_lang_Throwable::message(oop throwable) {
1257   return throwable->obj_field(detailMessage_offset);
1258 }
1259 
1260 
1261 oop java_lang_Throwable::message(Handle throwable) {
1262   return throwable->obj_field(detailMessage_offset);
1263 }
1264 
1265 
1266 // Return Symbol for detailed_message or NULL
1267 Symbol* java_lang_Throwable::detail_message(oop throwable) {
1268   PRESERVE_EXCEPTION_MARK;  // Keep original exception
1269   oop detailed_message = java_lang_Throwable::message(throwable);
1270   if (detailed_message != NULL) {
1271     return java_lang_String::as_symbol(detailed_message, THREAD);
1272   }
1273   return NULL;
1274 }
1275 
1276 void java_lang_Throwable::set_message(oop throwable, oop value) {
1277   throwable->obj_field_put(detailMessage_offset, value);
1278 }
1279 
1280 
1281 void java_lang_Throwable::set_stacktrace(oop throwable, oop st_element_array) {
1282   throwable->obj_field_put(stackTrace_offset, st_element_array);
1283 }
1284 
1285 void java_lang_Throwable::clear_stacktrace(oop throwable) {
1286   set_stacktrace(throwable, NULL);
1287 }
1288 
1289 
1290 void java_lang_Throwable::print(oop throwable, outputStream* st) {
1291   ResourceMark rm;
1292   Klass* k = throwable->klass();
1293   assert(k != NULL, "just checking");
1294   st->print("%s", InstanceKlass::cast(k)->external_name());
1295   oop msg = message(throwable);
1296   if (msg != NULL) {
1297     st->print(": %s", java_lang_String::as_utf8_string(msg));
1298   }
1299 }
1300 
1301 
1302 void java_lang_Throwable::print(Handle throwable, outputStream* st) {
1303   ResourceMark rm;
1304   Klass* k = throwable->klass();
1305   assert(k != NULL, "just checking");
1306   st->print("%s", InstanceKlass::cast(k)->external_name());
1307   oop msg = message(throwable);
1308   if (msg != NULL) {
1309     st->print(": %s", java_lang_String::as_utf8_string(msg));
1310   }
1311 }
1312 
1313 // After this many redefines, the stack trace is unreliable.
1314 const int MAX_VERSION = USHRT_MAX;
1315 
1316 // Helper backtrace functions to store bci|version together.
1317 static inline int merge_bci_and_version(int bci, int version) {
1318   // only store u2 for version, checking for overflow.
1319   if (version > USHRT_MAX || version < 0) version = MAX_VERSION;
1320   assert((jushort)bci == bci, "bci should be short");
1321   return build_int_from_shorts(version, bci);
1322 }
1323 
1324 static inline int bci_at(unsigned int merged) {
1325   return extract_high_short_from_int(merged);
1326 }
1327 static inline int version_at(unsigned int merged) {
1328   return extract_low_short_from_int(merged);
1329 }
1330 
1331 static inline bool version_matches(Method* method, int version) {
1332   assert(version < MAX_VERSION, "version is too big");
1333   return method != NULL && (method->constants()->version() == version);
1334 }
1335 
1336 static inline int get_line_number(Method* method, int bci) {
1337   int line_number = 0;
1338   if (method->is_native()) {
1339     // Negative value different from -1 below, enabling Java code in
1340     // class java.lang.StackTraceElement to distinguish "native" from
1341     // "no LineNumberTable".  JDK tests for -2.
1342     line_number = -2;
1343   } else {
1344     // Returns -1 if no LineNumberTable, and otherwise actual line number
1345     line_number = method->line_number_from_bci(bci);
1346     if (line_number == -1 && ShowHiddenFrames) {
1347       line_number = bci + 1000000;
1348     }
1349   }
1350   return line_number;
1351 }
1352 
1353 // This class provides a simple wrapper over the internal structure of
1354 // exception backtrace to insulate users of the backtrace from needing
1355 // to know what it looks like.
1356 class BacktraceBuilder: public StackObj {
1357  private:
1358   Handle          _backtrace;
1359   objArrayOop     _head;
1360   typeArrayOop    _methods;
1361   typeArrayOop    _bcis;
1362   objArrayOop     _mirrors;
1363   typeArrayOop    _cprefs; // needed to insulate method name against redefinition
1364   int             _index;
1365   No_Safepoint_Verifier _nsv;
1366 
1367  public:
1368 
1369   enum {
1370     trace_methods_offset = java_lang_Throwable::trace_methods_offset,
1371     trace_bcis_offset    = java_lang_Throwable::trace_bcis_offset,
1372     trace_mirrors_offset = java_lang_Throwable::trace_mirrors_offset,
1373     trace_cprefs_offset  = java_lang_Throwable::trace_cprefs_offset,
1374     trace_next_offset    = java_lang_Throwable::trace_next_offset,
1375     trace_size           = java_lang_Throwable::trace_size,
1376     trace_chunk_size     = java_lang_Throwable::trace_chunk_size
1377   };
1378 
1379   // get info out of chunks
1380   static typeArrayOop get_methods(objArrayHandle chunk) {
1381     typeArrayOop methods = typeArrayOop(chunk->obj_at(trace_methods_offset));
1382     assert(methods != NULL, "method array should be initialized in backtrace");
1383     return methods;
1384   }
1385   static typeArrayOop get_bcis(objArrayHandle chunk) {
1386     typeArrayOop bcis = typeArrayOop(chunk->obj_at(trace_bcis_offset));
1387     assert(bcis != NULL, "bci array should be initialized in backtrace");
1388     return bcis;
1389   }
1390   static objArrayOop get_mirrors(objArrayHandle chunk) {
1391     objArrayOop mirrors = objArrayOop(chunk->obj_at(trace_mirrors_offset));
1392     assert(mirrors != NULL, "mirror array should be initialized in backtrace");
1393     return mirrors;
1394   }
1395   static typeArrayOop get_cprefs(objArrayHandle chunk) {
1396     typeArrayOop cprefs = typeArrayOop(chunk->obj_at(trace_cprefs_offset));
1397     assert(cprefs != NULL, "cprefs array should be initialized in backtrace");
1398     return cprefs;
1399   }
1400 
1401   // constructor for new backtrace
1402   BacktraceBuilder(TRAPS): _methods(NULL), _bcis(NULL), _head(NULL), _mirrors(NULL), _cprefs(NULL) {
1403     expand(CHECK);
1404     _backtrace = _head;
1405     _index = 0;
1406   }
1407 
1408   BacktraceBuilder(objArrayHandle backtrace) {
1409     _methods = get_methods(backtrace);
1410     _bcis = get_bcis(backtrace);
1411     _mirrors = get_mirrors(backtrace);
1412     _cprefs = get_cprefs(backtrace);
1413     assert(_methods->length() == _bcis->length() &&
1414            _methods->length() == _mirrors->length(),
1415            "method and source information arrays should match");
1416 
1417     // head is the preallocated backtrace
1418     _backtrace = _head = backtrace();
1419     _index = 0;
1420   }
1421 
1422   void expand(TRAPS) {
1423     objArrayHandle old_head(THREAD, _head);
1424     Pause_No_Safepoint_Verifier pnsv(&_nsv);
1425 
1426     objArrayOop head = oopFactory::new_objectArray(trace_size, CHECK);
1427     objArrayHandle new_head(THREAD, head);
1428 
1429     typeArrayOop methods = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1430     typeArrayHandle new_methods(THREAD, methods);
1431 
1432     typeArrayOop bcis = oopFactory::new_intArray(trace_chunk_size, CHECK);
1433     typeArrayHandle new_bcis(THREAD, bcis);
1434 
1435     objArrayOop mirrors = oopFactory::new_objectArray(trace_chunk_size, CHECK);
1436     objArrayHandle new_mirrors(THREAD, mirrors);
1437 
1438     typeArrayOop cprefs = oopFactory::new_shortArray(trace_chunk_size, CHECK);
1439     typeArrayHandle new_cprefs(THREAD, cprefs);
1440 
1441     if (!old_head.is_null()) {
1442       old_head->obj_at_put(trace_next_offset, new_head());
1443     }
1444     new_head->obj_at_put(trace_methods_offset, new_methods());
1445     new_head->obj_at_put(trace_bcis_offset, new_bcis());
1446     new_head->obj_at_put(trace_mirrors_offset, new_mirrors());
1447     new_head->obj_at_put(trace_cprefs_offset, new_cprefs());
1448 
1449     _head    = new_head();
1450     _methods = new_methods();
1451     _bcis = new_bcis();
1452     _mirrors = new_mirrors();
1453     _cprefs  = new_cprefs();
1454     _index = 0;
1455   }
1456 
1457   oop backtrace() {
1458     return _backtrace();
1459   }
1460 
1461   inline void push(Method* method, int bci, TRAPS) {
1462     // Smear the -1 bci to 0 since the array only holds unsigned
1463     // shorts.  The later line number lookup would just smear the -1
1464     // to a 0 even if it could be recorded.
1465     if (bci == SynchronizationEntryBCI) bci = 0;
1466 
1467     if (_index >= trace_chunk_size) {
1468       methodHandle mhandle(THREAD, method);
1469       expand(CHECK);
1470       method = mhandle();
1471     }
1472 
1473     _methods->short_at_put(_index, method->orig_method_idnum());
1474     _bcis->int_at_put(_index, merge_bci_and_version(bci, method->constants()->version()));
1475     _cprefs->short_at_put(_index, method->name_index());
1476 
1477     // We need to save the mirrors in the backtrace to keep the class
1478     // from being unloaded while we still have this stack trace.
1479     assert(method->method_holder()->java_mirror() != NULL, "never push null for mirror");
1480     _mirrors->obj_at_put(_index, method->method_holder()->java_mirror());
1481     _index++;
1482   }
1483 
1484 };
1485 
1486 Symbol* get_source_file_name(InstanceKlass* holder, int version) {
1487   // Find the specific ik version that contains this source_file_name_index
1488   // via the previous versions list, but use the current version's
1489   // constant pool to look it up.  The previous version's index has been
1490   // merged for the current constant pool.
1491   InstanceKlass* ik = holder->get_klass_version(version);
1492   // This version has been cleaned up.
1493   if (ik == NULL) return NULL;
1494   int source_file_name_index = ik->source_file_name_index();
1495   return (source_file_name_index == 0) ?
1496       (Symbol*)NULL : holder->constants()->symbol_at(source_file_name_index);
1497 }
1498 
1499 // Print stack trace element to resource allocated buffer
1500 char* java_lang_Throwable::print_stack_element_to_buffer(Handle mirror,
1501                                   int method_id, int version, int bci, int cpref) {
1502 
1503   // Get strings and string lengths
1504   InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1505   const char* klass_name  = holder->external_name();
1506   int buf_len = (int)strlen(klass_name);
1507 
1508   Method* method = holder->method_with_orig_idnum(method_id, version);
1509 
1510   // The method can be NULL if the requested class version is gone
1511   Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref);
1512   char* method_name = sym->as_C_string();
1513   buf_len += (int)strlen(method_name);
1514 
1515   char* source_file_name = NULL;
1516   Symbol* source = get_source_file_name(holder, version);
1517   if (source != NULL) {
1518     source_file_name = source->as_C_string();
1519     buf_len += (int)strlen(source_file_name);
1520   }
1521 
1522   // Allocate temporary buffer with extra space for formatting and line number
1523   char* buf = NEW_RESOURCE_ARRAY(char, buf_len + 64);
1524 
1525   // Print stack trace line in buffer
1526   sprintf(buf, "\tat %s.%s", klass_name, method_name);
1527 
1528   if (!version_matches(method, version)) {
1529     strcat(buf, "(Redefined)");
1530   } else {
1531     int line_number = get_line_number(method, bci);
1532     if (line_number == -2) {
1533       strcat(buf, "(Native Method)");
1534     } else {
1535       if (source_file_name != NULL && (line_number != -1)) {
1536         // Sourcename and linenumber
1537         sprintf(buf + (int)strlen(buf), "(%s:%d)", source_file_name, line_number);
1538       } else if (source_file_name != NULL) {
1539         // Just sourcename
1540         sprintf(buf + (int)strlen(buf), "(%s)", source_file_name);
1541       } else {
1542         // Neither sourcename nor linenumber
1543         sprintf(buf + (int)strlen(buf), "(Unknown Source)");
1544       }
1545       nmethod* nm = method->code();
1546       if (WizardMode && nm != NULL) {
1547         sprintf(buf + (int)strlen(buf), "(nmethod " INTPTR_FORMAT ")", (intptr_t)nm);
1548       }
1549     }
1550   }
1551 
1552   return buf;
1553 }
1554 
1555 void java_lang_Throwable::print_stack_element(outputStream *st, Handle mirror,
1556                                               int method_id, int version, int bci, int cpref) {
1557   ResourceMark rm;
1558   char* buf = print_stack_element_to_buffer(mirror, method_id, version, bci, cpref);
1559   st->print_cr("%s", buf);
1560 }
1561 
1562 void java_lang_Throwable::print_stack_element(outputStream *st, methodHandle method, int bci) {
1563   Handle mirror = method->method_holder()->java_mirror();
1564   int method_id = method->orig_method_idnum();
1565   int version = method->constants()->version();
1566   int cpref = method->name_index();
1567   print_stack_element(st, mirror, method_id, version, bci, cpref);
1568 }
1569 
1570 const char* java_lang_Throwable::no_stack_trace_message() {
1571   return "\t<<no stack trace available>>";
1572 }
1573 
1574 
1575 // Currently used only for exceptions occurring during startup
1576 void java_lang_Throwable::print_stack_trace(oop throwable, outputStream* st) {
1577   Thread *THREAD = Thread::current();
1578   Handle h_throwable(THREAD, throwable);
1579   while (h_throwable.not_null()) {
1580     objArrayHandle result (THREAD, objArrayOop(backtrace(h_throwable())));
1581     if (result.is_null()) {
1582       st->print_cr("%s", no_stack_trace_message());
1583       return;
1584     }
1585 
1586     while (result.not_null()) {
1587 
1588       // Get method id, bci, version and mirror from chunk
1589       typeArrayHandle methods (THREAD, BacktraceBuilder::get_methods(result));
1590       typeArrayHandle bcis (THREAD, BacktraceBuilder::get_bcis(result));
1591       objArrayHandle mirrors (THREAD, BacktraceBuilder::get_mirrors(result));
1592       typeArrayHandle cprefs (THREAD, BacktraceBuilder::get_cprefs(result));
1593 
1594       int length = methods()->length();
1595       for (int index = 0; index < length; index++) {
1596         Handle mirror(THREAD, mirrors->obj_at(index));
1597         // NULL mirror means end of stack trace
1598         if (mirror.is_null()) goto handle_cause;
1599         int method = methods->short_at(index);
1600         int version = version_at(bcis->int_at(index));
1601         int bci = bci_at(bcis->int_at(index));
1602         int cpref = cprefs->short_at(index);
1603         print_stack_element(st, mirror, method, version, bci, cpref);
1604       }
1605       result = objArrayHandle(THREAD, objArrayOop(result->obj_at(trace_next_offset)));
1606     }
1607   handle_cause:
1608     {
1609       EXCEPTION_MARK;
1610       JavaValue cause(T_OBJECT);
1611       JavaCalls::call_virtual(&cause,
1612                               h_throwable,
1613                               KlassHandle(THREAD, h_throwable->klass()),
1614                               vmSymbols::getCause_name(),
1615                               vmSymbols::void_throwable_signature(),
1616                               THREAD);
1617       // Ignore any exceptions. we are in the middle of exception handling. Same as classic VM.
1618       if (HAS_PENDING_EXCEPTION) {
1619         CLEAR_PENDING_EXCEPTION;
1620         h_throwable = Handle();
1621       } else {
1622         h_throwable = Handle(THREAD, (oop) cause.get_jobject());
1623         if (h_throwable.not_null()) {
1624           st->print("Caused by: ");
1625           print(h_throwable, st);
1626           st->cr();
1627         }
1628       }
1629     }
1630   }
1631 }
1632 
1633 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method, TRAPS) {
1634   if (!StackTraceInThrowable) return;
1635   ResourceMark rm(THREAD);
1636 
1637   // Start out by clearing the backtrace for this object, in case the VM
1638   // runs out of memory while allocating the stack trace
1639   set_backtrace(throwable(), NULL);
1640   // Clear lazily constructed Java level stacktrace if refilling occurs
1641   // This is unnecessary in 1.7+ but harmless
1642   clear_stacktrace(throwable());
1643 
1644   int max_depth = MaxJavaStackTraceDepth;
1645   JavaThread* thread = (JavaThread*)THREAD;
1646   BacktraceBuilder bt(CHECK);
1647 
1648   // If there is no Java frame just return the method that was being called
1649   // with bci 0
1650   if (!thread->has_last_Java_frame()) {
1651     if (max_depth >= 1 && method() != NULL) {
1652       bt.push(method(), 0, CHECK);
1653       set_backtrace(throwable(), bt.backtrace());
1654     }
1655     return;
1656   }
1657 
1658   // Instead of using vframe directly, this version of fill_in_stack_trace
1659   // basically handles everything by hand. This significantly improved the
1660   // speed of this method call up to 28.5% on Solaris sparc. 27.1% on Windows.
1661   // See bug 6333838 for  more details.
1662   // The "ASSERT" here is to verify this method generates the exactly same stack
1663   // trace as utilizing vframe.
1664 #ifdef ASSERT
1665   vframeStream st(thread);
1666   methodHandle st_method(THREAD, st.method());
1667 #endif
1668   int total_count = 0;
1669   RegisterMap map(thread, false);
1670   int decode_offset = 0;
1671   nmethod* nm = NULL;
1672   bool skip_fillInStackTrace_check = false;
1673   bool skip_throwableInit_check = false;
1674   bool skip_hidden = !ShowHiddenFrames;
1675 
1676   for (frame fr = thread->last_frame(); max_depth != total_count;) {
1677     Method* method = NULL;
1678     int bci = 0;
1679 
1680     // Compiled java method case.
1681     if (decode_offset != 0) {
1682       DebugInfoReadStream stream(nm, decode_offset);
1683       decode_offset = stream.read_int();
1684       method = (Method*)nm->metadata_at(stream.read_int());
1685       bci = stream.read_bci();
1686     } else {
1687       if (fr.is_first_frame()) break;
1688       address pc = fr.pc();
1689       if (fr.is_interpreted_frame()) {
1690         address bcp = fr.interpreter_frame_bcp();
1691         method = fr.interpreter_frame_method();
1692         bci =  method->bci_from(bcp);
1693         fr = fr.sender(&map);
1694       } else {
1695         CodeBlob* cb = fr.cb();
1696         // HMMM QQQ might be nice to have frame return nm as NULL if cb is non-NULL
1697         // but non nmethod
1698         fr = fr.sender(&map);
1699         if (cb == NULL || !cb->is_nmethod()) {
1700           continue;
1701         }
1702         nm = (nmethod*)cb;
1703         if (nm->method()->is_native()) {
1704           method = nm->method();
1705           bci = 0;
1706         } else {
1707           PcDesc* pd = nm->pc_desc_at(pc);
1708           decode_offset = pd->scope_decode_offset();
1709           // if decode_offset is not equal to 0, it will execute the
1710           // "compiled java method case" at the beginning of the loop.
1711           continue;
1712         }
1713       }
1714     }
1715 #ifdef ASSERT
1716     assert(st_method() == method && st.bci() == bci,
1717            "Wrong stack trace");
1718     st.next();
1719     // vframeStream::method isn't GC-safe so store off a copy
1720     // of the Method* in case we GC.
1721     if (!st.at_end()) {
1722       st_method = st.method();
1723     }
1724 #endif
1725 
1726     // the format of the stacktrace will be:
1727     // - 1 or more fillInStackTrace frames for the exception class (skipped)
1728     // - 0 or more <init> methods for the exception class (skipped)
1729     // - rest of the stack
1730 
1731     if (!skip_fillInStackTrace_check) {
1732       if (method->name() == vmSymbols::fillInStackTrace_name() &&
1733           throwable->is_a(method->method_holder())) {
1734         continue;
1735       }
1736       else {
1737         skip_fillInStackTrace_check = true; // gone past them all
1738       }
1739     }
1740     if (!skip_throwableInit_check) {
1741       assert(skip_fillInStackTrace_check, "logic error in backtrace filtering");
1742 
1743       // skip <init> methods of the exception class and superclasses
1744       // This is simlar to classic VM.
1745       if (method->name() == vmSymbols::object_initializer_name() &&
1746           throwable->is_a(method->method_holder())) {
1747         continue;
1748       } else {
1749         // there are none or we've seen them all - either way stop checking
1750         skip_throwableInit_check = true;
1751       }
1752     }
1753     if (method->is_hidden()) {
1754       if (skip_hidden)  continue;
1755     }
1756     bt.push(method, bci, CHECK);
1757     total_count++;
1758   }
1759 
1760   // Put completed stack trace into throwable object
1761   set_backtrace(throwable(), bt.backtrace());
1762 }
1763 
1764 void java_lang_Throwable::fill_in_stack_trace(Handle throwable, methodHandle method) {
1765   // No-op if stack trace is disabled
1766   if (!StackTraceInThrowable) {
1767     return;
1768   }
1769 
1770   // Disable stack traces for some preallocated out of memory errors
1771   if (!Universe::should_fill_in_stack_trace(throwable)) {
1772     return;
1773   }
1774 
1775   PRESERVE_EXCEPTION_MARK;
1776 
1777   JavaThread* thread = JavaThread::active();
1778   fill_in_stack_trace(throwable, method, thread);
1779   // ignore exceptions thrown during stack trace filling
1780   CLEAR_PENDING_EXCEPTION;
1781 }
1782 
1783 void java_lang_Throwable::allocate_backtrace(Handle throwable, TRAPS) {
1784   // Allocate stack trace - backtrace is created but not filled in
1785 
1786   // No-op if stack trace is disabled
1787   if (!StackTraceInThrowable) return;
1788   BacktraceBuilder bt(CHECK);   // creates a backtrace
1789   set_backtrace(throwable(), bt.backtrace());
1790 }
1791 
1792 
1793 void java_lang_Throwable::fill_in_stack_trace_of_preallocated_backtrace(Handle throwable) {
1794   // Fill in stack trace into preallocated backtrace (no GC)
1795 
1796   // No-op if stack trace is disabled
1797   if (!StackTraceInThrowable) return;
1798 
1799   assert(throwable->is_a(SystemDictionary::Throwable_klass()), "sanity check");
1800 
1801   JavaThread* THREAD = JavaThread::current();
1802 
1803   objArrayHandle backtrace (THREAD, (objArrayOop)java_lang_Throwable::backtrace(throwable()));
1804   assert(backtrace.not_null(), "backtrace should have been preallocated");
1805 
1806   ResourceMark rm(THREAD);
1807   vframeStream st(THREAD);
1808 
1809   BacktraceBuilder bt(backtrace);
1810 
1811   // Unlike fill_in_stack_trace we do not skip fillInStackTrace or throwable init
1812   // methods as preallocated errors aren't created by "java" code.
1813 
1814   // fill in as much stack trace as possible
1815   typeArrayOop methods = BacktraceBuilder::get_methods(backtrace);
1816   int max_chunks = MIN2(methods->length(), (int)MaxJavaStackTraceDepth);
1817   int chunk_count = 0;
1818 
1819   for (;!st.at_end(); st.next()) {
1820     bt.push(st.method(), st.bci(), CHECK);
1821     chunk_count++;
1822 
1823     // Bail-out for deep stacks
1824     if (chunk_count >= max_chunks) break;
1825   }
1826 
1827   // We support the Throwable immutability protocol defined for Java 7.
1828   java_lang_Throwable::set_stacktrace(throwable(), java_lang_Throwable::unassigned_stacktrace());
1829   assert(java_lang_Throwable::unassigned_stacktrace() != NULL, "not initialized");
1830 }
1831 
1832 
1833 int java_lang_Throwable::get_stack_trace_depth(oop throwable, TRAPS) {
1834   if (throwable == NULL) {
1835     THROW_0(vmSymbols::java_lang_NullPointerException());
1836   }
1837   objArrayOop chunk = objArrayOop(backtrace(throwable));
1838   int depth = 0;
1839   if (chunk != NULL) {
1840     // Iterate over chunks and count full ones
1841     while (true) {
1842       objArrayOop next = objArrayOop(chunk->obj_at(trace_next_offset));
1843       if (next == NULL) break;
1844       depth += trace_chunk_size;
1845       chunk = next;
1846     }
1847     assert(chunk != NULL && chunk->obj_at(trace_next_offset) == NULL, "sanity check");
1848     // Count element in remaining partial chunk.  NULL value for mirror
1849     // marks the end of the stack trace elements that are saved.
1850     objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk);
1851     assert(mirrors != NULL, "sanity check");
1852     for (int i = 0; i < mirrors->length(); i++) {
1853       if (mirrors->obj_at(i) == NULL) break;
1854       depth++;
1855     }
1856   }
1857   return depth;
1858 }
1859 
1860 
1861 oop java_lang_Throwable::get_stack_trace_element(oop throwable, int index, TRAPS) {
1862   if (throwable == NULL) {
1863     THROW_0(vmSymbols::java_lang_NullPointerException());
1864   }
1865   if (index < 0) {
1866     THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1867   }
1868   // Compute how many chunks to skip and index into actual chunk
1869   objArrayOop chunk = objArrayOop(backtrace(throwable));
1870   int skip_chunks = index / trace_chunk_size;
1871   int chunk_index = index % trace_chunk_size;
1872   while (chunk != NULL && skip_chunks > 0) {
1873     chunk = objArrayOop(chunk->obj_at(trace_next_offset));
1874         skip_chunks--;
1875   }
1876   if (chunk == NULL) {
1877     THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1878   }
1879   // Get method id, bci, version, mirror and cpref from chunk
1880   typeArrayOop methods = BacktraceBuilder::get_methods(chunk);
1881   typeArrayOop bcis = BacktraceBuilder::get_bcis(chunk);
1882   objArrayOop mirrors = BacktraceBuilder::get_mirrors(chunk);
1883   typeArrayOop cprefs = BacktraceBuilder::get_cprefs(chunk);
1884 
1885   assert(methods != NULL && bcis != NULL && mirrors != NULL, "sanity check");
1886 
1887   int method = methods->short_at(chunk_index);
1888   int version = version_at(bcis->int_at(chunk_index));
1889   int bci = bci_at(bcis->int_at(chunk_index));
1890   int cpref = cprefs->short_at(chunk_index);
1891   Handle mirror(THREAD, mirrors->obj_at(chunk_index));
1892 
1893   // Chunk can be partial full
1894   if (mirror.is_null()) {
1895     THROW_(vmSymbols::java_lang_IndexOutOfBoundsException(), NULL);
1896   }
1897   oop element = java_lang_StackTraceElement::create(mirror, method, version, bci, cpref, CHECK_0);
1898   return element;
1899 }
1900 
1901 oop java_lang_StackTraceElement::create(Handle mirror, int method_id,
1902                                         int version, int bci, int cpref, TRAPS) {
1903   // Allocate java.lang.StackTraceElement instance
1904   Klass* k = SystemDictionary::StackTraceElement_klass();
1905   assert(k != NULL, "must be loaded in 1.4+");
1906   instanceKlassHandle ik (THREAD, k);
1907   if (ik->should_be_initialized()) {
1908     ik->initialize(CHECK_0);
1909   }
1910 
1911   Handle element = ik->allocate_instance_handle(CHECK_0);
1912   // Fill in class name
1913   ResourceMark rm(THREAD);
1914   InstanceKlass* holder = InstanceKlass::cast(java_lang_Class::as_Klass(mirror()));
1915   const char* str = holder->external_name();
1916   oop classname = StringTable::intern((char*) str, CHECK_0);
1917   java_lang_StackTraceElement::set_declaringClass(element(), classname);
1918 
1919   Method* method = holder->method_with_orig_idnum(method_id, version);
1920 
1921   // The method can be NULL if the requested class version is gone
1922   Symbol* sym = (method != NULL) ? method->name() : holder->constants()->symbol_at(cpref);
1923 
1924   // Fill in method name
1925   oop methodname = StringTable::intern(sym, CHECK_0);
1926   java_lang_StackTraceElement::set_methodName(element(), methodname);
1927 
1928   if (!version_matches(method, version)) {
1929     // The method was redefined, accurate line number information isn't available
1930     java_lang_StackTraceElement::set_fileName(element(), NULL);
1931     java_lang_StackTraceElement::set_lineNumber(element(), -1);
1932   } else {
1933     // Fill in source file name and line number.
1934     Symbol* source = get_source_file_name(holder, version);
1935     if (ShowHiddenFrames && source == NULL)
1936       source = vmSymbols::unknown_class_name();
1937     oop filename = StringTable::intern(source, CHECK_0);
1938     java_lang_StackTraceElement::set_fileName(element(), filename);
1939 
1940     int line_number = get_line_number(method, bci);
1941     java_lang_StackTraceElement::set_lineNumber(element(), line_number);
1942   }
1943   return element();
1944 }
1945 
1946 oop java_lang_StackTraceElement::create(methodHandle method, int bci, TRAPS) {
1947   Handle mirror (THREAD, method->method_holder()->java_mirror());
1948   int method_id = method->orig_method_idnum();
1949   int cpref = method->name_index();
1950   return create(mirror, method_id, method->constants()->version(), bci, cpref, THREAD);
1951 }
1952 
1953 void java_lang_reflect_AccessibleObject::compute_offsets() {
1954   Klass* k = SystemDictionary::reflect_AccessibleObject_klass();
1955   compute_offset(override_offset, k, vmSymbols::override_name(), vmSymbols::bool_signature());
1956 }
1957 
1958 jboolean java_lang_reflect_AccessibleObject::override(oop reflect) {
1959   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1960   return (jboolean) reflect->bool_field(override_offset);
1961 }
1962 
1963 void java_lang_reflect_AccessibleObject::set_override(oop reflect, jboolean value) {
1964   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1965   reflect->bool_field_put(override_offset, (int) value);
1966 }
1967 
1968 void java_lang_reflect_Method::compute_offsets() {
1969   Klass* k = SystemDictionary::reflect_Method_klass();
1970   compute_offset(clazz_offset,          k, vmSymbols::clazz_name(),          vmSymbols::class_signature());
1971   compute_offset(name_offset,           k, vmSymbols::name_name(),           vmSymbols::string_signature());
1972   compute_offset(returnType_offset,     k, vmSymbols::returnType_name(),     vmSymbols::class_signature());
1973   compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
1974   compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
1975   compute_offset(slot_offset,           k, vmSymbols::slot_name(),           vmSymbols::int_signature());
1976   compute_offset(modifiers_offset,      k, vmSymbols::modifiers_name(),      vmSymbols::int_signature());
1977   // The generic signature and annotations fields are only present in 1.5
1978   signature_offset = -1;
1979   annotations_offset = -1;
1980   parameter_annotations_offset = -1;
1981   annotation_default_offset = -1;
1982   type_annotations_offset = -1;
1983   compute_optional_offset(signature_offset,             k, vmSymbols::signature_name(),             vmSymbols::string_signature());
1984   compute_optional_offset(annotations_offset,           k, vmSymbols::annotations_name(),           vmSymbols::byte_array_signature());
1985   compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
1986   compute_optional_offset(annotation_default_offset,    k, vmSymbols::annotation_default_name(),    vmSymbols::byte_array_signature());
1987   compute_optional_offset(type_annotations_offset,      k, vmSymbols::type_annotations_name(),      vmSymbols::byte_array_signature());
1988 }
1989 
1990 Handle java_lang_reflect_Method::create(TRAPS) {
1991   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
1992   Klass* klass = SystemDictionary::reflect_Method_klass();
1993   // This class is eagerly initialized during VM initialization, since we keep a refence
1994   // to one of the methods
1995   assert(InstanceKlass::cast(klass)->is_initialized(), "must be initialized");
1996   return InstanceKlass::cast(klass)->allocate_instance_handle(THREAD);
1997 }
1998 
1999 oop java_lang_reflect_Method::clazz(oop reflect) {
2000   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2001   return reflect->obj_field(clazz_offset);
2002 }
2003 
2004 void java_lang_reflect_Method::set_clazz(oop reflect, oop value) {
2005   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2006    reflect->obj_field_put(clazz_offset, value);
2007 }
2008 
2009 int java_lang_reflect_Method::slot(oop reflect) {
2010   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2011   return reflect->int_field(slot_offset);
2012 }
2013 
2014 void java_lang_reflect_Method::set_slot(oop reflect, int value) {
2015   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2016   reflect->int_field_put(slot_offset, value);
2017 }
2018 
2019 oop java_lang_reflect_Method::name(oop method) {
2020   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2021   return method->obj_field(name_offset);
2022 }
2023 
2024 void java_lang_reflect_Method::set_name(oop method, oop value) {
2025   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2026   method->obj_field_put(name_offset, value);
2027 }
2028 
2029 oop java_lang_reflect_Method::return_type(oop method) {
2030   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2031   return method->obj_field(returnType_offset);
2032 }
2033 
2034 void java_lang_reflect_Method::set_return_type(oop method, oop value) {
2035   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2036   method->obj_field_put(returnType_offset, value);
2037 }
2038 
2039 oop java_lang_reflect_Method::parameter_types(oop method) {
2040   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2041   return method->obj_field(parameterTypes_offset);
2042 }
2043 
2044 void java_lang_reflect_Method::set_parameter_types(oop method, oop value) {
2045   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2046   method->obj_field_put(parameterTypes_offset, value);
2047 }
2048 
2049 oop java_lang_reflect_Method::exception_types(oop method) {
2050   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2051   return method->obj_field(exceptionTypes_offset);
2052 }
2053 
2054 void java_lang_reflect_Method::set_exception_types(oop method, oop value) {
2055   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2056   method->obj_field_put(exceptionTypes_offset, value);
2057 }
2058 
2059 int java_lang_reflect_Method::modifiers(oop method) {
2060   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2061   return method->int_field(modifiers_offset);
2062 }
2063 
2064 void java_lang_reflect_Method::set_modifiers(oop method, int value) {
2065   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2066   method->int_field_put(modifiers_offset, value);
2067 }
2068 
2069 bool java_lang_reflect_Method::has_signature_field() {
2070   return (signature_offset >= 0);
2071 }
2072 
2073 oop java_lang_reflect_Method::signature(oop method) {
2074   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2075   assert(has_signature_field(), "signature field must be present");
2076   return method->obj_field(signature_offset);
2077 }
2078 
2079 void java_lang_reflect_Method::set_signature(oop method, oop value) {
2080   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2081   assert(has_signature_field(), "signature field must be present");
2082   method->obj_field_put(signature_offset, value);
2083 }
2084 
2085 bool java_lang_reflect_Method::has_annotations_field() {
2086   return (annotations_offset >= 0);
2087 }
2088 
2089 oop java_lang_reflect_Method::annotations(oop method) {
2090   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2091   assert(has_annotations_field(), "annotations field must be present");
2092   return method->obj_field(annotations_offset);
2093 }
2094 
2095 void java_lang_reflect_Method::set_annotations(oop method, oop value) {
2096   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2097   assert(has_annotations_field(), "annotations field must be present");
2098   method->obj_field_put(annotations_offset, value);
2099 }
2100 
2101 bool java_lang_reflect_Method::has_parameter_annotations_field() {
2102   return (parameter_annotations_offset >= 0);
2103 }
2104 
2105 oop java_lang_reflect_Method::parameter_annotations(oop method) {
2106   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2107   assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2108   return method->obj_field(parameter_annotations_offset);
2109 }
2110 
2111 void java_lang_reflect_Method::set_parameter_annotations(oop method, oop value) {
2112   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2113   assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2114   method->obj_field_put(parameter_annotations_offset, value);
2115 }
2116 
2117 bool java_lang_reflect_Method::has_annotation_default_field() {
2118   return (annotation_default_offset >= 0);
2119 }
2120 
2121 oop java_lang_reflect_Method::annotation_default(oop method) {
2122   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2123   assert(has_annotation_default_field(), "annotation default field must be present");
2124   return method->obj_field(annotation_default_offset);
2125 }
2126 
2127 void java_lang_reflect_Method::set_annotation_default(oop method, oop value) {
2128   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2129   assert(has_annotation_default_field(), "annotation default field must be present");
2130   method->obj_field_put(annotation_default_offset, value);
2131 }
2132 
2133 bool java_lang_reflect_Method::has_type_annotations_field() {
2134   return (type_annotations_offset >= 0);
2135 }
2136 
2137 oop java_lang_reflect_Method::type_annotations(oop method) {
2138   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2139   assert(has_type_annotations_field(), "type_annotations field must be present");
2140   return method->obj_field(type_annotations_offset);
2141 }
2142 
2143 void java_lang_reflect_Method::set_type_annotations(oop method, oop value) {
2144   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2145   assert(has_type_annotations_field(), "type_annotations field must be present");
2146   method->obj_field_put(type_annotations_offset, value);
2147 }
2148 
2149 void java_lang_reflect_Constructor::compute_offsets() {
2150   Klass* k = SystemDictionary::reflect_Constructor_klass();
2151   compute_offset(clazz_offset,          k, vmSymbols::clazz_name(),          vmSymbols::class_signature());
2152   compute_offset(parameterTypes_offset, k, vmSymbols::parameterTypes_name(), vmSymbols::class_array_signature());
2153   compute_offset(exceptionTypes_offset, k, vmSymbols::exceptionTypes_name(), vmSymbols::class_array_signature());
2154   compute_offset(slot_offset,           k, vmSymbols::slot_name(),           vmSymbols::int_signature());
2155   compute_offset(modifiers_offset,      k, vmSymbols::modifiers_name(),      vmSymbols::int_signature());
2156   // The generic signature and annotations fields are only present in 1.5
2157   signature_offset = -1;
2158   annotations_offset = -1;
2159   parameter_annotations_offset = -1;
2160   type_annotations_offset = -1;
2161   compute_optional_offset(signature_offset,             k, vmSymbols::signature_name(),             vmSymbols::string_signature());
2162   compute_optional_offset(annotations_offset,           k, vmSymbols::annotations_name(),           vmSymbols::byte_array_signature());
2163   compute_optional_offset(parameter_annotations_offset, k, vmSymbols::parameter_annotations_name(), vmSymbols::byte_array_signature());
2164   compute_optional_offset(type_annotations_offset,      k, vmSymbols::type_annotations_name(),      vmSymbols::byte_array_signature());
2165 }
2166 
2167 Handle java_lang_reflect_Constructor::create(TRAPS) {
2168   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2169   Symbol* name = vmSymbols::java_lang_reflect_Constructor();
2170   Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2171   instanceKlassHandle klass (THREAD, k);
2172   // Ensure it is initialized
2173   klass->initialize(CHECK_NH);
2174   return klass->allocate_instance_handle(THREAD);
2175 }
2176 
2177 oop java_lang_reflect_Constructor::clazz(oop reflect) {
2178   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2179   return reflect->obj_field(clazz_offset);
2180 }
2181 
2182 void java_lang_reflect_Constructor::set_clazz(oop reflect, oop value) {
2183   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2184    reflect->obj_field_put(clazz_offset, value);
2185 }
2186 
2187 oop java_lang_reflect_Constructor::parameter_types(oop constructor) {
2188   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2189   return constructor->obj_field(parameterTypes_offset);
2190 }
2191 
2192 void java_lang_reflect_Constructor::set_parameter_types(oop constructor, oop value) {
2193   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2194   constructor->obj_field_put(parameterTypes_offset, value);
2195 }
2196 
2197 oop java_lang_reflect_Constructor::exception_types(oop constructor) {
2198   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2199   return constructor->obj_field(exceptionTypes_offset);
2200 }
2201 
2202 void java_lang_reflect_Constructor::set_exception_types(oop constructor, oop value) {
2203   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2204   constructor->obj_field_put(exceptionTypes_offset, value);
2205 }
2206 
2207 int java_lang_reflect_Constructor::slot(oop reflect) {
2208   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2209   return reflect->int_field(slot_offset);
2210 }
2211 
2212 void java_lang_reflect_Constructor::set_slot(oop reflect, int value) {
2213   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2214   reflect->int_field_put(slot_offset, value);
2215 }
2216 
2217 int java_lang_reflect_Constructor::modifiers(oop constructor) {
2218   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2219   return constructor->int_field(modifiers_offset);
2220 }
2221 
2222 void java_lang_reflect_Constructor::set_modifiers(oop constructor, int value) {
2223   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2224   constructor->int_field_put(modifiers_offset, value);
2225 }
2226 
2227 bool java_lang_reflect_Constructor::has_signature_field() {
2228   return (signature_offset >= 0);
2229 }
2230 
2231 oop java_lang_reflect_Constructor::signature(oop constructor) {
2232   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2233   assert(has_signature_field(), "signature field must be present");
2234   return constructor->obj_field(signature_offset);
2235 }
2236 
2237 void java_lang_reflect_Constructor::set_signature(oop constructor, oop value) {
2238   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2239   assert(has_signature_field(), "signature field must be present");
2240   constructor->obj_field_put(signature_offset, value);
2241 }
2242 
2243 bool java_lang_reflect_Constructor::has_annotations_field() {
2244   return (annotations_offset >= 0);
2245 }
2246 
2247 oop java_lang_reflect_Constructor::annotations(oop constructor) {
2248   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2249   assert(has_annotations_field(), "annotations field must be present");
2250   return constructor->obj_field(annotations_offset);
2251 }
2252 
2253 void java_lang_reflect_Constructor::set_annotations(oop constructor, oop value) {
2254   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2255   assert(has_annotations_field(), "annotations field must be present");
2256   constructor->obj_field_put(annotations_offset, value);
2257 }
2258 
2259 bool java_lang_reflect_Constructor::has_parameter_annotations_field() {
2260   return (parameter_annotations_offset >= 0);
2261 }
2262 
2263 oop java_lang_reflect_Constructor::parameter_annotations(oop method) {
2264   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2265   assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2266   return method->obj_field(parameter_annotations_offset);
2267 }
2268 
2269 void java_lang_reflect_Constructor::set_parameter_annotations(oop method, oop value) {
2270   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2271   assert(has_parameter_annotations_field(), "parameter annotations field must be present");
2272   method->obj_field_put(parameter_annotations_offset, value);
2273 }
2274 
2275 bool java_lang_reflect_Constructor::has_type_annotations_field() {
2276   return (type_annotations_offset >= 0);
2277 }
2278 
2279 oop java_lang_reflect_Constructor::type_annotations(oop constructor) {
2280   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2281   assert(has_type_annotations_field(), "type_annotations field must be present");
2282   return constructor->obj_field(type_annotations_offset);
2283 }
2284 
2285 void java_lang_reflect_Constructor::set_type_annotations(oop constructor, oop value) {
2286   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2287   assert(has_type_annotations_field(), "type_annotations field must be present");
2288   constructor->obj_field_put(type_annotations_offset, value);
2289 }
2290 
2291 void java_lang_reflect_Field::compute_offsets() {
2292   Klass* k = SystemDictionary::reflect_Field_klass();
2293   compute_offset(clazz_offset,     k, vmSymbols::clazz_name(),     vmSymbols::class_signature());
2294   compute_offset(name_offset,      k, vmSymbols::name_name(),      vmSymbols::string_signature());
2295   compute_offset(type_offset,      k, vmSymbols::type_name(),      vmSymbols::class_signature());
2296   compute_offset(slot_offset,      k, vmSymbols::slot_name(),      vmSymbols::int_signature());
2297   compute_offset(modifiers_offset, k, vmSymbols::modifiers_name(), vmSymbols::int_signature());
2298   // The generic signature and annotations fields are only present in 1.5
2299   signature_offset = -1;
2300   annotations_offset = -1;
2301   type_annotations_offset = -1;
2302   compute_optional_offset(signature_offset, k, vmSymbols::signature_name(), vmSymbols::string_signature());
2303   compute_optional_offset(annotations_offset,  k, vmSymbols::annotations_name(),  vmSymbols::byte_array_signature());
2304   compute_optional_offset(type_annotations_offset,  k, vmSymbols::type_annotations_name(),  vmSymbols::byte_array_signature());
2305 }
2306 
2307 Handle java_lang_reflect_Field::create(TRAPS) {
2308   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2309   Symbol* name = vmSymbols::java_lang_reflect_Field();
2310   Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2311   instanceKlassHandle klass (THREAD, k);
2312   // Ensure it is initialized
2313   klass->initialize(CHECK_NH);
2314   return klass->allocate_instance_handle(THREAD);
2315 }
2316 
2317 oop java_lang_reflect_Field::clazz(oop reflect) {
2318   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2319   return reflect->obj_field(clazz_offset);
2320 }
2321 
2322 void java_lang_reflect_Field::set_clazz(oop reflect, oop value) {
2323   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2324    reflect->obj_field_put(clazz_offset, value);
2325 }
2326 
2327 oop java_lang_reflect_Field::name(oop field) {
2328   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2329   return field->obj_field(name_offset);
2330 }
2331 
2332 void java_lang_reflect_Field::set_name(oop field, oop value) {
2333   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2334   field->obj_field_put(name_offset, value);
2335 }
2336 
2337 oop java_lang_reflect_Field::type(oop field) {
2338   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2339   return field->obj_field(type_offset);
2340 }
2341 
2342 void java_lang_reflect_Field::set_type(oop field, oop value) {
2343   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2344   field->obj_field_put(type_offset, value);
2345 }
2346 
2347 int java_lang_reflect_Field::slot(oop reflect) {
2348   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2349   return reflect->int_field(slot_offset);
2350 }
2351 
2352 void java_lang_reflect_Field::set_slot(oop reflect, int value) {
2353   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2354   reflect->int_field_put(slot_offset, value);
2355 }
2356 
2357 int java_lang_reflect_Field::modifiers(oop field) {
2358   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2359   return field->int_field(modifiers_offset);
2360 }
2361 
2362 void java_lang_reflect_Field::set_modifiers(oop field, int value) {
2363   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2364   field->int_field_put(modifiers_offset, value);
2365 }
2366 
2367 bool java_lang_reflect_Field::has_signature_field() {
2368   return (signature_offset >= 0);
2369 }
2370 
2371 oop java_lang_reflect_Field::signature(oop field) {
2372   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2373   assert(has_signature_field(), "signature field must be present");
2374   return field->obj_field(signature_offset);
2375 }
2376 
2377 void java_lang_reflect_Field::set_signature(oop field, oop value) {
2378   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2379   assert(has_signature_field(), "signature field must be present");
2380   field->obj_field_put(signature_offset, value);
2381 }
2382 
2383 bool java_lang_reflect_Field::has_annotations_field() {
2384   return (annotations_offset >= 0);
2385 }
2386 
2387 oop java_lang_reflect_Field::annotations(oop field) {
2388   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2389   assert(has_annotations_field(), "annotations field must be present");
2390   return field->obj_field(annotations_offset);
2391 }
2392 
2393 void java_lang_reflect_Field::set_annotations(oop field, oop value) {
2394   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2395   assert(has_annotations_field(), "annotations field must be present");
2396   field->obj_field_put(annotations_offset, value);
2397 }
2398 
2399 bool java_lang_reflect_Field::has_type_annotations_field() {
2400   return (type_annotations_offset >= 0);
2401 }
2402 
2403 oop java_lang_reflect_Field::type_annotations(oop field) {
2404   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2405   assert(has_type_annotations_field(), "type_annotations field must be present");
2406   return field->obj_field(type_annotations_offset);
2407 }
2408 
2409 void java_lang_reflect_Field::set_type_annotations(oop field, oop value) {
2410   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2411   assert(has_type_annotations_field(), "type_annotations field must be present");
2412   field->obj_field_put(type_annotations_offset, value);
2413 }
2414 
2415 void sun_reflect_ConstantPool::compute_offsets() {
2416   Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2417   // This null test can be removed post beta
2418   if (k != NULL) {
2419     // The field is called ConstantPool* in the sun.reflect.ConstantPool class.
2420     compute_offset(_oop_offset, k, vmSymbols::ConstantPool_name(), vmSymbols::object_signature());
2421   }
2422 }
2423 
2424 void java_lang_reflect_Parameter::compute_offsets() {
2425   Klass* k = SystemDictionary::reflect_Parameter_klass();
2426   if(NULL != k) {
2427     compute_offset(name_offset,        k, vmSymbols::name_name(),        vmSymbols::string_signature());
2428     compute_offset(modifiers_offset,   k, vmSymbols::modifiers_name(),   vmSymbols::int_signature());
2429     compute_offset(index_offset,       k, vmSymbols::index_name(),       vmSymbols::int_signature());
2430     compute_offset(executable_offset,  k, vmSymbols::executable_name(),  vmSymbols::executable_signature());
2431   }
2432 }
2433 
2434 Handle java_lang_reflect_Parameter::create(TRAPS) {
2435   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2436   Symbol* name = vmSymbols::java_lang_reflect_Parameter();
2437   Klass* k = SystemDictionary::resolve_or_fail(name, true, CHECK_NH);
2438   instanceKlassHandle klass (THREAD, k);
2439   // Ensure it is initialized
2440   klass->initialize(CHECK_NH);
2441   return klass->allocate_instance_handle(THREAD);
2442 }
2443 
2444 oop java_lang_reflect_Parameter::name(oop param) {
2445   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2446   return param->obj_field(name_offset);
2447 }
2448 
2449 void java_lang_reflect_Parameter::set_name(oop param, oop value) {
2450   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2451   param->obj_field_put(name_offset, value);
2452 }
2453 
2454 int java_lang_reflect_Parameter::modifiers(oop param) {
2455   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2456   return param->int_field(modifiers_offset);
2457 }
2458 
2459 void java_lang_reflect_Parameter::set_modifiers(oop param, int value) {
2460   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2461   param->int_field_put(modifiers_offset, value);
2462 }
2463 
2464 int java_lang_reflect_Parameter::index(oop param) {
2465   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2466   return param->int_field(index_offset);
2467 }
2468 
2469 void java_lang_reflect_Parameter::set_index(oop param, int value) {
2470   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2471   param->int_field_put(index_offset, value);
2472 }
2473 
2474 oop java_lang_reflect_Parameter::executable(oop param) {
2475   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2476   return param->obj_field(executable_offset);
2477 }
2478 
2479 void java_lang_reflect_Parameter::set_executable(oop param, oop value) {
2480   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2481   param->obj_field_put(executable_offset, value);
2482 }
2483 
2484 
2485 Handle sun_reflect_ConstantPool::create(TRAPS) {
2486   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2487   Klass* k = SystemDictionary::reflect_ConstantPool_klass();
2488   instanceKlassHandle klass (THREAD, k);
2489   // Ensure it is initialized
2490   klass->initialize(CHECK_NH);
2491   return klass->allocate_instance_handle(THREAD);
2492 }
2493 
2494 
2495 void sun_reflect_ConstantPool::set_cp(oop reflect, ConstantPool* value) {
2496   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2497   oop mirror = value->pool_holder()->java_mirror();
2498   // Save the mirror to get back the constant pool.
2499   reflect->obj_field_put(_oop_offset, mirror);
2500 }
2501 
2502 ConstantPool* sun_reflect_ConstantPool::get_cp(oop reflect) {
2503   assert(Universe::is_fully_initialized(), "Need to find another solution to the reflection problem");
2504 
2505   oop mirror = reflect->obj_field(_oop_offset);
2506   Klass* k = java_lang_Class::as_Klass(mirror);
2507   assert(k->oop_is_instance(), "Must be");
2508 
2509   // Get the constant pool back from the klass.  Since class redefinition
2510   // merges the new constant pool into the old, this is essentially the
2511   // same constant pool as the original.  If constant pool merging is
2512   // no longer done in the future, this will have to change to save
2513   // the original.
2514   return InstanceKlass::cast(k)->constants();
2515 }
2516 
2517 void sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets() {
2518   Klass* k = SystemDictionary::reflect_UnsafeStaticFieldAccessorImpl_klass();
2519   // This null test can be removed post beta
2520   if (k != NULL) {
2521     compute_offset(_base_offset, k,
2522                    vmSymbols::base_name(), vmSymbols::object_signature());
2523   }
2524 }
2525 
2526 oop java_lang_boxing_object::initialize_and_allocate(BasicType type, TRAPS) {
2527   Klass* k = SystemDictionary::box_klass(type);
2528   if (k == NULL)  return NULL;
2529   instanceKlassHandle h (THREAD, k);
2530   if (!h->is_initialized())  h->initialize(CHECK_0);
2531   return h->allocate_instance(THREAD);
2532 }
2533 
2534 
2535 oop java_lang_boxing_object::create(BasicType type, jvalue* value, TRAPS) {
2536   oop box = initialize_and_allocate(type, CHECK_0);
2537   if (box == NULL)  return NULL;
2538   switch (type) {
2539     case T_BOOLEAN:
2540       box->bool_field_put(value_offset, value->z);
2541       break;
2542     case T_CHAR:
2543       box->char_field_put(value_offset, value->c);
2544       break;
2545     case T_FLOAT:
2546       box->float_field_put(value_offset, value->f);
2547       break;
2548     case T_DOUBLE:
2549       box->double_field_put(long_value_offset, value->d);
2550       break;
2551     case T_BYTE:
2552       box->byte_field_put(value_offset, value->b);
2553       break;
2554     case T_SHORT:
2555       box->short_field_put(value_offset, value->s);
2556       break;
2557     case T_INT:
2558       box->int_field_put(value_offset, value->i);
2559       break;
2560     case T_LONG:
2561       box->long_field_put(long_value_offset, value->j);
2562       break;
2563     default:
2564       return NULL;
2565   }
2566   return box;
2567 }
2568 
2569 
2570 BasicType java_lang_boxing_object::basic_type(oop box) {
2571   if (box == NULL)  return T_ILLEGAL;
2572   BasicType type = SystemDictionary::box_klass_type(box->klass());
2573   if (type == T_OBJECT)         // 'unknown' value returned by SD::bkt
2574     return T_ILLEGAL;
2575   return type;
2576 }
2577 
2578 
2579 BasicType java_lang_boxing_object::get_value(oop box, jvalue* value) {
2580   BasicType type = SystemDictionary::box_klass_type(box->klass());
2581   switch (type) {
2582   case T_BOOLEAN:
2583     value->z = box->bool_field(value_offset);
2584     break;
2585   case T_CHAR:
2586     value->c = box->char_field(value_offset);
2587     break;
2588   case T_FLOAT:
2589     value->f = box->float_field(value_offset);
2590     break;
2591   case T_DOUBLE:
2592     value->d = box->double_field(long_value_offset);
2593     break;
2594   case T_BYTE:
2595     value->b = box->byte_field(value_offset);
2596     break;
2597   case T_SHORT:
2598     value->s = box->short_field(value_offset);
2599     break;
2600   case T_INT:
2601     value->i = box->int_field(value_offset);
2602     break;
2603   case T_LONG:
2604     value->j = box->long_field(long_value_offset);
2605     break;
2606   default:
2607     return T_ILLEGAL;
2608   } // end switch
2609   return type;
2610 }
2611 
2612 
2613 BasicType java_lang_boxing_object::set_value(oop box, jvalue* value) {
2614   BasicType type = SystemDictionary::box_klass_type(box->klass());
2615   switch (type) {
2616   case T_BOOLEAN:
2617     box->bool_field_put(value_offset, value->z);
2618     break;
2619   case T_CHAR:
2620     box->char_field_put(value_offset, value->c);
2621     break;
2622   case T_FLOAT:
2623     box->float_field_put(value_offset, value->f);
2624     break;
2625   case T_DOUBLE:
2626     box->double_field_put(long_value_offset, value->d);
2627     break;
2628   case T_BYTE:
2629     box->byte_field_put(value_offset, value->b);
2630     break;
2631   case T_SHORT:
2632     box->short_field_put(value_offset, value->s);
2633     break;
2634   case T_INT:
2635     box->int_field_put(value_offset, value->i);
2636     break;
2637   case T_LONG:
2638     box->long_field_put(long_value_offset, value->j);
2639     break;
2640   default:
2641     return T_ILLEGAL;
2642   } // end switch
2643   return type;
2644 }
2645 
2646 
2647 void java_lang_boxing_object::print(BasicType type, jvalue* value, outputStream* st) {
2648   switch (type) {
2649   case T_BOOLEAN:   st->print("%s", value->z ? "true" : "false");   break;
2650   case T_CHAR:      st->print("%d", value->c);                      break;
2651   case T_BYTE:      st->print("%d", value->b);                      break;
2652   case T_SHORT:     st->print("%d", value->s);                      break;
2653   case T_INT:       st->print("%d", value->i);                      break;
2654   case T_LONG:      st->print(INT64_FORMAT, value->j);              break;
2655   case T_FLOAT:     st->print("%f", value->f);                      break;
2656   case T_DOUBLE:    st->print("%lf", value->d);                     break;
2657   default:          st->print("type %d?", type);                    break;
2658   }
2659 }
2660 
2661 
2662 // Support for java_lang_ref_Reference
2663 HeapWord *java_lang_ref_Reference::pending_list_lock_addr() {
2664   InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2665   address addr = ik->static_field_addr(static_lock_offset);
2666   return (HeapWord*) addr;
2667 }
2668 
2669 oop java_lang_ref_Reference::pending_list_lock() {
2670   InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2671   address addr = ik->static_field_addr(static_lock_offset);
2672   if (UseCompressedOops) {
2673     return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2674   } else {
2675     return oopDesc::load_decode_heap_oop((oop*)addr);
2676   }
2677 }
2678 
2679 HeapWord *java_lang_ref_Reference::pending_list_addr() {
2680   InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::Reference_klass());
2681   address addr = ik->static_field_addr(static_pending_offset);
2682   // XXX This might not be HeapWord aligned, almost rather be char *.
2683   return (HeapWord*)addr;
2684 }
2685 
2686 oop java_lang_ref_Reference::pending_list() {
2687   char *addr = (char *)pending_list_addr();
2688   if (UseCompressedOops) {
2689     return oopDesc::load_decode_heap_oop((narrowOop *)addr);
2690   } else {
2691     return oopDesc::load_decode_heap_oop((oop*)addr);
2692   }
2693 }
2694 
2695 
2696 // Support for java_lang_ref_SoftReference
2697 
2698 jlong java_lang_ref_SoftReference::timestamp(oop ref) {
2699   return ref->long_field(timestamp_offset);
2700 }
2701 
2702 jlong java_lang_ref_SoftReference::clock() {
2703   InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass());
2704   jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2705   return *offset;
2706 }
2707 
2708 void java_lang_ref_SoftReference::set_clock(jlong value) {
2709   InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::SoftReference_klass());
2710   jlong* offset = (jlong*)ik->static_field_addr(static_clock_offset);
2711   *offset = value;
2712 }
2713 
2714 // Support for java_lang_invoke_DirectMethodHandle
2715 
2716 int java_lang_invoke_DirectMethodHandle::_member_offset;
2717 
2718 oop java_lang_invoke_DirectMethodHandle::member(oop dmh) {
2719   oop member_name = NULL;
2720   bool is_dmh = dmh->is_oop() && java_lang_invoke_DirectMethodHandle::is_instance(dmh);
2721   assert(is_dmh, "a DirectMethodHandle oop is expected");
2722   if (is_dmh) {
2723     member_name = dmh->obj_field(member_offset_in_bytes());
2724   }
2725   return member_name;
2726 }
2727 
2728 void java_lang_invoke_DirectMethodHandle::compute_offsets() {
2729   Klass* klass_oop = SystemDictionary::DirectMethodHandle_klass();
2730   if (klass_oop != NULL) {
2731     compute_offset(_member_offset, klass_oop, vmSymbols::member_name(), vmSymbols::java_lang_invoke_MemberName_signature());
2732   }
2733 }
2734 
2735 // Support for java_lang_invoke_MethodHandle
2736 
2737 int java_lang_invoke_MethodHandle::_type_offset;
2738 int java_lang_invoke_MethodHandle::_form_offset;
2739 
2740 int java_lang_invoke_MemberName::_clazz_offset;
2741 int java_lang_invoke_MemberName::_name_offset;
2742 int java_lang_invoke_MemberName::_type_offset;
2743 int java_lang_invoke_MemberName::_flags_offset;
2744 int java_lang_invoke_MemberName::_vmtarget_offset;
2745 int java_lang_invoke_MemberName::_vmloader_offset;
2746 int java_lang_invoke_MemberName::_vmindex_offset;
2747 
2748 int java_lang_invoke_LambdaForm::_vmentry_offset;
2749 
2750 void java_lang_invoke_MethodHandle::compute_offsets() {
2751   Klass* klass_oop = SystemDictionary::MethodHandle_klass();
2752   if (klass_oop != NULL) {
2753     compute_offset(_type_offset, klass_oop, vmSymbols::type_name(), vmSymbols::java_lang_invoke_MethodType_signature());
2754     compute_offset(_form_offset, klass_oop, vmSymbols::form_name(), vmSymbols::java_lang_invoke_LambdaForm_signature());
2755   }
2756 }
2757 
2758 void java_lang_invoke_MemberName::compute_offsets() {
2759   Klass* klass_oop = SystemDictionary::MemberName_klass();
2760   if (klass_oop != NULL) {
2761     compute_offset(_clazz_offset,     klass_oop, vmSymbols::clazz_name(),     vmSymbols::class_signature());
2762     compute_offset(_name_offset,      klass_oop, vmSymbols::name_name(),      vmSymbols::string_signature());
2763     compute_offset(_type_offset,      klass_oop, vmSymbols::type_name(),      vmSymbols::object_signature());
2764     compute_offset(_flags_offset,     klass_oop, vmSymbols::flags_name(),     vmSymbols::int_signature());
2765     MEMBERNAME_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
2766   }
2767 }
2768 
2769 void java_lang_invoke_LambdaForm::compute_offsets() {
2770   Klass* klass_oop = SystemDictionary::LambdaForm_klass();
2771   if (klass_oop != NULL) {
2772     compute_offset(_vmentry_offset, klass_oop, vmSymbols::vmentry_name(), vmSymbols::java_lang_invoke_MemberName_signature());
2773   }
2774 }
2775 
2776 bool java_lang_invoke_LambdaForm::is_instance(oop obj) {
2777   return obj != NULL && is_subclass(obj->klass());
2778 }
2779 
2780 
2781 oop java_lang_invoke_MethodHandle::type(oop mh) {
2782   return mh->obj_field(_type_offset);
2783 }
2784 
2785 void java_lang_invoke_MethodHandle::set_type(oop mh, oop mtype) {
2786   mh->obj_field_put(_type_offset, mtype);
2787 }
2788 
2789 oop java_lang_invoke_MethodHandle::form(oop mh) {
2790   assert(_form_offset != 0, "");
2791   return mh->obj_field(_form_offset);
2792 }
2793 
2794 void java_lang_invoke_MethodHandle::set_form(oop mh, oop lform) {
2795   assert(_form_offset != 0, "");
2796   mh->obj_field_put(_form_offset, lform);
2797 }
2798 
2799 /// MemberName accessors
2800 
2801 oop java_lang_invoke_MemberName::clazz(oop mname) {
2802   assert(is_instance(mname), "wrong type");
2803   return mname->obj_field(_clazz_offset);
2804 }
2805 
2806 void java_lang_invoke_MemberName::set_clazz(oop mname, oop clazz) {
2807   assert(is_instance(mname), "wrong type");
2808   mname->obj_field_put(_clazz_offset, clazz);
2809 }
2810 
2811 oop java_lang_invoke_MemberName::name(oop mname) {
2812   assert(is_instance(mname), "wrong type");
2813   return mname->obj_field(_name_offset);
2814 }
2815 
2816 void java_lang_invoke_MemberName::set_name(oop mname, oop name) {
2817   assert(is_instance(mname), "wrong type");
2818   mname->obj_field_put(_name_offset, name);
2819 }
2820 
2821 oop java_lang_invoke_MemberName::type(oop mname) {
2822   assert(is_instance(mname), "wrong type");
2823   return mname->obj_field(_type_offset);
2824 }
2825 
2826 void java_lang_invoke_MemberName::set_type(oop mname, oop type) {
2827   assert(is_instance(mname), "wrong type");
2828   mname->obj_field_put(_type_offset, type);
2829 }
2830 
2831 int java_lang_invoke_MemberName::flags(oop mname) {
2832   assert(is_instance(mname), "wrong type");
2833   return mname->int_field(_flags_offset);
2834 }
2835 
2836 void java_lang_invoke_MemberName::set_flags(oop mname, int flags) {
2837   assert(is_instance(mname), "wrong type");
2838   mname->int_field_put(_flags_offset, flags);
2839 }
2840 
2841 Metadata* java_lang_invoke_MemberName::vmtarget(oop mname) {
2842   assert(is_instance(mname), "wrong type");
2843   return (Metadata*)mname->address_field(_vmtarget_offset);
2844 }
2845 
2846 bool java_lang_invoke_MemberName::is_method(oop mname) {
2847   assert(is_instance(mname), "must be MemberName");
2848   return (flags(mname) & (MN_IS_METHOD | MN_IS_CONSTRUCTOR)) > 0;
2849 }
2850 
2851 void java_lang_invoke_MemberName::set_vmtarget(oop mname, Metadata* ref) {
2852   assert(is_instance(mname), "wrong type");
2853   // check the type of the vmtarget
2854   oop dependency = NULL;
2855   if (ref != NULL) {
2856     switch (flags(mname) & (MN_IS_METHOD |
2857                             MN_IS_CONSTRUCTOR |
2858                             MN_IS_FIELD)) {
2859     case MN_IS_METHOD:
2860     case MN_IS_CONSTRUCTOR:
2861       assert(ref->is_method(), "should be a method");
2862       dependency = ((Method*)ref)->method_holder()->java_mirror();
2863       break;
2864     case MN_IS_FIELD:
2865       assert(ref->is_klass(), "should be a class");
2866       dependency = ((Klass*)ref)->java_mirror();
2867       break;
2868     default:
2869       ShouldNotReachHere();
2870     }
2871   }
2872   mname->address_field_put(_vmtarget_offset, (address)ref);
2873   // Add a reference to the loader (actually mirror because anonymous classes will not have
2874   // distinct loaders) to ensure the metadata is kept alive
2875   // This mirror may be different than the one in clazz field.
2876   mname->obj_field_put(_vmloader_offset, dependency);
2877 }
2878 
2879 intptr_t java_lang_invoke_MemberName::vmindex(oop mname) {
2880   assert(is_instance(mname), "wrong type");
2881   return (intptr_t) mname->address_field(_vmindex_offset);
2882 }
2883 
2884 void java_lang_invoke_MemberName::set_vmindex(oop mname, intptr_t index) {
2885   assert(is_instance(mname), "wrong type");
2886   mname->address_field_put(_vmindex_offset, (address) index);
2887 }
2888 
2889 oop java_lang_invoke_LambdaForm::vmentry(oop lform) {
2890   assert(is_instance(lform), "wrong type");
2891   return lform->obj_field(_vmentry_offset);
2892 }
2893 
2894 
2895 // Support for java_lang_invoke_MethodType
2896 
2897 int java_lang_invoke_MethodType::_rtype_offset;
2898 int java_lang_invoke_MethodType::_ptypes_offset;
2899 
2900 void java_lang_invoke_MethodType::compute_offsets() {
2901   Klass* k = SystemDictionary::MethodType_klass();
2902   if (k != NULL) {
2903     compute_offset(_rtype_offset,  k, vmSymbols::rtype_name(),  vmSymbols::class_signature());
2904     compute_offset(_ptypes_offset, k, vmSymbols::ptypes_name(), vmSymbols::class_array_signature());
2905   }
2906 }
2907 
2908 void java_lang_invoke_MethodType::print_signature(oop mt, outputStream* st) {
2909   st->print("(");
2910   objArrayOop pts = ptypes(mt);
2911   for (int i = 0, limit = pts->length(); i < limit; i++) {
2912     java_lang_Class::print_signature(pts->obj_at(i), st);
2913   }
2914   st->print(")");
2915   java_lang_Class::print_signature(rtype(mt), st);
2916 }
2917 
2918 Symbol* java_lang_invoke_MethodType::as_signature(oop mt, bool intern_if_not_found, TRAPS) {
2919   ResourceMark rm;
2920   stringStream buffer(128);
2921   print_signature(mt, &buffer);
2922   const char* sigstr =       buffer.base();
2923   int         siglen = (int) buffer.size();
2924   Symbol *name;
2925   if (!intern_if_not_found) {
2926     name = SymbolTable::probe(sigstr, siglen);
2927   } else {
2928     name = SymbolTable::new_symbol(sigstr, siglen, THREAD);
2929   }
2930   return name;
2931 }
2932 
2933 bool java_lang_invoke_MethodType::equals(oop mt1, oop mt2) {
2934   if (mt1 == mt2)
2935     return true;
2936   if (rtype(mt1) != rtype(mt2))
2937     return false;
2938   if (ptype_count(mt1) != ptype_count(mt2))
2939     return false;
2940   for (int i = ptype_count(mt1) - 1; i >= 0; i--) {
2941     if (ptype(mt1, i) != ptype(mt2, i))
2942       return false;
2943   }
2944   return true;
2945 }
2946 
2947 oop java_lang_invoke_MethodType::rtype(oop mt) {
2948   assert(is_instance(mt), "must be a MethodType");
2949   return mt->obj_field(_rtype_offset);
2950 }
2951 
2952 objArrayOop java_lang_invoke_MethodType::ptypes(oop mt) {
2953   assert(is_instance(mt), "must be a MethodType");
2954   return (objArrayOop) mt->obj_field(_ptypes_offset);
2955 }
2956 
2957 oop java_lang_invoke_MethodType::ptype(oop mt, int idx) {
2958   return ptypes(mt)->obj_at(idx);
2959 }
2960 
2961 int java_lang_invoke_MethodType::ptype_count(oop mt) {
2962   return ptypes(mt)->length();
2963 }
2964 
2965 int java_lang_invoke_MethodType::ptype_slot_count(oop mt) {
2966   objArrayOop pts = ptypes(mt);
2967   int count = pts->length();
2968   int slots = 0;
2969   for (int i = 0; i < count; i++) {
2970     BasicType bt = java_lang_Class::as_BasicType(pts->obj_at(i));
2971     slots += type2size[bt];
2972   }
2973   return slots;
2974 }
2975 
2976 int java_lang_invoke_MethodType::rtype_slot_count(oop mt) {
2977   BasicType bt = java_lang_Class::as_BasicType(rtype(mt));
2978   return type2size[bt];
2979 }
2980 
2981 
2982 // Support for java_lang_invoke_CallSite
2983 
2984 int java_lang_invoke_CallSite::_target_offset;
2985 int java_lang_invoke_CallSite::_context_offset;
2986 
2987 void java_lang_invoke_CallSite::compute_offsets() {
2988   Klass* k = SystemDictionary::CallSite_klass();
2989   if (k != NULL) {
2990     compute_offset(_target_offset, k, vmSymbols::target_name(), vmSymbols::java_lang_invoke_MethodHandle_signature());
2991     compute_offset(_context_offset, k, vmSymbols::context_name(),
2992                    vmSymbols::java_lang_invoke_MethodHandleNatives_CallSiteContext_signature());
2993   }
2994 }
2995 
2996 oop java_lang_invoke_CallSite::context(oop call_site) {
2997   assert(java_lang_invoke_CallSite::is_instance(call_site), "");
2998 
2999   oop dep_oop = call_site->obj_field(_context_offset);
3000   return dep_oop;
3001 }
3002 
3003 // Support for java_lang_invoke_MethodHandleNatives_CallSiteContext
3004 
3005 int java_lang_invoke_MethodHandleNatives_CallSiteContext::_vmdependencies_offset;
3006 
3007 void java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets() {
3008   Klass* k = SystemDictionary::Context_klass();
3009   if (k != NULL) {
3010     CALLSITECONTEXT_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3011   }
3012 }
3013 
3014 nmethodBucket* java_lang_invoke_MethodHandleNatives_CallSiteContext::vmdependencies(oop call_site) {
3015   assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
3016   return (nmethodBucket*) (address) call_site->long_field(_vmdependencies_offset);
3017 }
3018 
3019 void java_lang_invoke_MethodHandleNatives_CallSiteContext::set_vmdependencies(oop call_site, nmethodBucket* context) {
3020   assert(java_lang_invoke_MethodHandleNatives_CallSiteContext::is_instance(call_site), "");
3021   call_site->long_field_put(_vmdependencies_offset, (jlong) (address) context);
3022 }
3023 
3024 // Support for java_security_AccessControlContext
3025 
3026 int java_security_AccessControlContext::_context_offset = 0;
3027 int java_security_AccessControlContext::_privilegedContext_offset = 0;
3028 int java_security_AccessControlContext::_isPrivileged_offset = 0;
3029 int java_security_AccessControlContext::_isAuthorized_offset = -1;
3030 
3031 void java_security_AccessControlContext::compute_offsets() {
3032   assert(_isPrivileged_offset == 0, "offsets should be initialized only once");
3033   fieldDescriptor fd;
3034   InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass());
3035 
3036   if (!ik->find_local_field(vmSymbols::context_name(), vmSymbols::protectiondomain_signature(), &fd)) {
3037     fatal("Invalid layout of java.security.AccessControlContext");
3038   }
3039   _context_offset = fd.offset();
3040 
3041   if (!ik->find_local_field(vmSymbols::privilegedContext_name(), vmSymbols::accesscontrolcontext_signature(), &fd)) {
3042     fatal("Invalid layout of java.security.AccessControlContext");
3043   }
3044   _privilegedContext_offset = fd.offset();
3045 
3046   if (!ik->find_local_field(vmSymbols::isPrivileged_name(), vmSymbols::bool_signature(), &fd)) {
3047     fatal("Invalid layout of java.security.AccessControlContext");
3048   }
3049   _isPrivileged_offset = fd.offset();
3050 
3051   // The offset may not be present for bootstrapping with older JDK.
3052   if (ik->find_local_field(vmSymbols::isAuthorized_name(), vmSymbols::bool_signature(), &fd)) {
3053     _isAuthorized_offset = fd.offset();
3054   }
3055 }
3056 
3057 
3058 bool java_security_AccessControlContext::is_authorized(Handle context) {
3059   assert(context.not_null() && context->klass() == SystemDictionary::AccessControlContext_klass(), "Invalid type");
3060   assert(_isAuthorized_offset != -1, "should be set");
3061   return context->bool_field(_isAuthorized_offset) != 0;
3062 }
3063 
3064 oop java_security_AccessControlContext::create(objArrayHandle context, bool isPrivileged, Handle privileged_context, TRAPS) {
3065   assert(_isPrivileged_offset != 0, "offsets should have been initialized");
3066   // Ensure klass is initialized
3067   InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->initialize(CHECK_0);
3068   // Allocate result
3069   oop result = InstanceKlass::cast(SystemDictionary::AccessControlContext_klass())->allocate_instance(CHECK_0);
3070   // Fill in values
3071   result->obj_field_put(_context_offset, context());
3072   result->obj_field_put(_privilegedContext_offset, privileged_context());
3073   result->bool_field_put(_isPrivileged_offset, isPrivileged);
3074   // whitelist AccessControlContexts created by the JVM if present
3075   if (_isAuthorized_offset != -1) {
3076     result->bool_field_put(_isAuthorized_offset, true);
3077   }
3078   return result;
3079 }
3080 
3081 
3082 // Support for java_lang_ClassLoader
3083 
3084 bool java_lang_ClassLoader::offsets_computed = false;
3085 int  java_lang_ClassLoader::_loader_data_offset = -1;
3086 int  java_lang_ClassLoader::parallelCapable_offset = -1;
3087 
3088 ClassLoaderData** java_lang_ClassLoader::loader_data_addr(oop loader) {
3089     assert(loader != NULL && loader->is_oop(), "loader must be oop");
3090     return (ClassLoaderData**) loader->address_field_addr(_loader_data_offset);
3091 }
3092 
3093 ClassLoaderData* java_lang_ClassLoader::loader_data(oop loader) {
3094   return *java_lang_ClassLoader::loader_data_addr(loader);
3095 }
3096 
3097 void java_lang_ClassLoader::compute_offsets() {
3098   assert(!offsets_computed, "offsets should be initialized only once");
3099   offsets_computed = true;
3100 
3101   // The field indicating parallelCapable (parallelLockMap) is only present starting in 7,
3102   Klass* k1 = SystemDictionary::ClassLoader_klass();
3103   compute_optional_offset(parallelCapable_offset,
3104     k1, vmSymbols::parallelCapable_name(), vmSymbols::concurrenthashmap_signature());
3105 
3106   CLASSLOADER_INJECTED_FIELDS(INJECTED_FIELD_COMPUTE_OFFSET);
3107 }
3108 
3109 oop java_lang_ClassLoader::parent(oop loader) {
3110   assert(is_instance(loader), "loader must be oop");
3111   return loader->obj_field(parent_offset);
3112 }
3113 
3114 bool java_lang_ClassLoader::isAncestor(oop loader, oop cl) {
3115   assert(is_instance(loader), "loader must be oop");
3116   assert(cl == NULL || is_instance(cl), "cl argument must be oop");
3117   oop acl = loader;
3118   debug_only(jint loop_count = 0);
3119   // This loop taken verbatim from ClassLoader.java:
3120   do {
3121     acl = parent(acl);
3122     if (cl == acl) {
3123       return true;
3124     }
3125     assert(++loop_count > 0, "loop_count overflow");
3126   } while (acl != NULL);
3127   return false;
3128 }
3129 
3130 bool java_lang_ClassLoader::is_instance(oop obj) {
3131   return obj != NULL && is_subclass(obj->klass());
3132 }
3133 
3134 
3135 // For class loader classes, parallelCapable defined
3136 // based on non-null field
3137 // Written to by java.lang.ClassLoader, vm only reads this field, doesn't set it
3138 bool java_lang_ClassLoader::parallelCapable(oop class_loader) {
3139   if (parallelCapable_offset == -1) {
3140      // Default for backward compatibility is false
3141      return false;
3142   }
3143   return (class_loader->obj_field(parallelCapable_offset) != NULL);
3144 }
3145 
3146 bool java_lang_ClassLoader::is_trusted_loader(oop loader) {
3147   // Fix for 4474172; see evaluation for more details
3148   loader = non_reflection_class_loader(loader);
3149 
3150   oop cl = SystemDictionary::java_system_loader();
3151   while(cl != NULL) {
3152     if (cl == loader) return true;
3153     cl = parent(cl);
3154   }
3155   return false;
3156 }
3157 
3158 oop java_lang_ClassLoader::non_reflection_class_loader(oop loader) {
3159   if (loader != NULL) {
3160     // See whether this is one of the class loaders associated with
3161     // the generated bytecodes for reflection, and if so, "magically"
3162     // delegate to its parent to prevent class loading from occurring
3163     // in places where applications using reflection didn't expect it.
3164     Klass* delegating_cl_class = SystemDictionary::reflect_DelegatingClassLoader_klass();
3165     // This might be null in non-1.4 JDKs
3166     if (delegating_cl_class != NULL && loader->is_a(delegating_cl_class)) {
3167       return parent(loader);
3168     }
3169   }
3170   return loader;
3171 }
3172 
3173 
3174 // Support for java_lang_System
3175 int java_lang_System::in_offset_in_bytes() {
3176   return (InstanceMirrorKlass::offset_of_static_fields() + static_in_offset);
3177 }
3178 
3179 
3180 int java_lang_System::out_offset_in_bytes() {
3181   return (InstanceMirrorKlass::offset_of_static_fields() + static_out_offset);
3182 }
3183 
3184 
3185 int java_lang_System::err_offset_in_bytes() {
3186   return (InstanceMirrorKlass::offset_of_static_fields() + static_err_offset);
3187 }
3188 
3189 
3190 bool java_lang_System::has_security_manager() {
3191   InstanceKlass* ik = InstanceKlass::cast(SystemDictionary::System_klass());
3192   address addr = ik->static_field_addr(static_security_offset);
3193   if (UseCompressedOops) {
3194     return oopDesc::load_decode_heap_oop((narrowOop *)addr) != NULL;
3195   } else {
3196     return oopDesc::load_decode_heap_oop((oop*)addr) != NULL;
3197   }
3198 }
3199 
3200 int java_lang_Class::_klass_offset;
3201 int java_lang_Class::_array_klass_offset;
3202 int java_lang_Class::_oop_size_offset;
3203 int java_lang_Class::_static_oop_field_count_offset;
3204 int java_lang_Class::_class_loader_offset;
3205 int java_lang_Class::_protection_domain_offset;
3206 int java_lang_Class::_component_mirror_offset;
3207 int java_lang_Class::_init_lock_offset;
3208 int java_lang_Class::_signers_offset;
3209 GrowableArray<Klass*>* java_lang_Class::_fixup_mirror_list = NULL;
3210 int java_lang_Throwable::backtrace_offset;
3211 int java_lang_Throwable::detailMessage_offset;
3212 int java_lang_Throwable::cause_offset;
3213 int java_lang_Throwable::stackTrace_offset;
3214 int java_lang_Throwable::static_unassigned_stacktrace_offset;
3215 int java_lang_reflect_AccessibleObject::override_offset;
3216 int java_lang_reflect_Method::clazz_offset;
3217 int java_lang_reflect_Method::name_offset;
3218 int java_lang_reflect_Method::returnType_offset;
3219 int java_lang_reflect_Method::parameterTypes_offset;
3220 int java_lang_reflect_Method::exceptionTypes_offset;
3221 int java_lang_reflect_Method::slot_offset;
3222 int java_lang_reflect_Method::modifiers_offset;
3223 int java_lang_reflect_Method::signature_offset;
3224 int java_lang_reflect_Method::annotations_offset;
3225 int java_lang_reflect_Method::parameter_annotations_offset;
3226 int java_lang_reflect_Method::annotation_default_offset;
3227 int java_lang_reflect_Method::type_annotations_offset;
3228 int java_lang_reflect_Constructor::clazz_offset;
3229 int java_lang_reflect_Constructor::parameterTypes_offset;
3230 int java_lang_reflect_Constructor::exceptionTypes_offset;
3231 int java_lang_reflect_Constructor::slot_offset;
3232 int java_lang_reflect_Constructor::modifiers_offset;
3233 int java_lang_reflect_Constructor::signature_offset;
3234 int java_lang_reflect_Constructor::annotations_offset;
3235 int java_lang_reflect_Constructor::parameter_annotations_offset;
3236 int java_lang_reflect_Constructor::type_annotations_offset;
3237 int java_lang_reflect_Field::clazz_offset;
3238 int java_lang_reflect_Field::name_offset;
3239 int java_lang_reflect_Field::type_offset;
3240 int java_lang_reflect_Field::slot_offset;
3241 int java_lang_reflect_Field::modifiers_offset;
3242 int java_lang_reflect_Field::signature_offset;
3243 int java_lang_reflect_Field::annotations_offset;
3244 int java_lang_reflect_Field::type_annotations_offset;
3245 int java_lang_reflect_Parameter::name_offset;
3246 int java_lang_reflect_Parameter::modifiers_offset;
3247 int java_lang_reflect_Parameter::index_offset;
3248 int java_lang_reflect_Parameter::executable_offset;
3249 int java_lang_boxing_object::value_offset;
3250 int java_lang_boxing_object::long_value_offset;
3251 int java_lang_ref_Reference::referent_offset;
3252 int java_lang_ref_Reference::queue_offset;
3253 int java_lang_ref_Reference::next_offset;
3254 int java_lang_ref_Reference::discovered_offset;
3255 int java_lang_ref_Reference::static_lock_offset;
3256 int java_lang_ref_Reference::static_pending_offset;
3257 int java_lang_ref_Reference::number_of_fake_oop_fields;
3258 int java_lang_ref_SoftReference::timestamp_offset;
3259 int java_lang_ref_SoftReference::static_clock_offset;
3260 int java_lang_ClassLoader::parent_offset;
3261 int java_lang_System::static_in_offset;
3262 int java_lang_System::static_out_offset;
3263 int java_lang_System::static_err_offset;
3264 int java_lang_System::static_security_offset;
3265 int java_lang_StackTraceElement::declaringClass_offset;
3266 int java_lang_StackTraceElement::methodName_offset;
3267 int java_lang_StackTraceElement::fileName_offset;
3268 int java_lang_StackTraceElement::lineNumber_offset;
3269 int java_lang_AssertionStatusDirectives::classes_offset;
3270 int java_lang_AssertionStatusDirectives::classEnabled_offset;
3271 int java_lang_AssertionStatusDirectives::packages_offset;
3272 int java_lang_AssertionStatusDirectives::packageEnabled_offset;
3273 int java_lang_AssertionStatusDirectives::deflt_offset;
3274 int java_nio_Buffer::_limit_offset;
3275 int java_util_concurrent_locks_AbstractOwnableSynchronizer::_owner_offset = 0;
3276 int sun_reflect_ConstantPool::_oop_offset;
3277 int sun_reflect_UnsafeStaticFieldAccessorImpl::_base_offset;
3278 
3279 
3280 // Support for java_lang_StackTraceElement
3281 
3282 void java_lang_StackTraceElement::set_fileName(oop element, oop value) {
3283   element->obj_field_put(fileName_offset, value);
3284 }
3285 
3286 void java_lang_StackTraceElement::set_declaringClass(oop element, oop value) {
3287   element->obj_field_put(declaringClass_offset, value);
3288 }
3289 
3290 void java_lang_StackTraceElement::set_methodName(oop element, oop value) {
3291   element->obj_field_put(methodName_offset, value);
3292 }
3293 
3294 void java_lang_StackTraceElement::set_lineNumber(oop element, int value) {
3295   element->int_field_put(lineNumber_offset, value);
3296 }
3297 
3298 
3299 // Support for java Assertions - java_lang_AssertionStatusDirectives.
3300 
3301 void java_lang_AssertionStatusDirectives::set_classes(oop o, oop val) {
3302   o->obj_field_put(classes_offset, val);
3303 }
3304 
3305 void java_lang_AssertionStatusDirectives::set_classEnabled(oop o, oop val) {
3306   o->obj_field_put(classEnabled_offset, val);
3307 }
3308 
3309 void java_lang_AssertionStatusDirectives::set_packages(oop o, oop val) {
3310   o->obj_field_put(packages_offset, val);
3311 }
3312 
3313 void java_lang_AssertionStatusDirectives::set_packageEnabled(oop o, oop val) {
3314   o->obj_field_put(packageEnabled_offset, val);
3315 }
3316 
3317 void java_lang_AssertionStatusDirectives::set_deflt(oop o, bool val) {
3318   o->bool_field_put(deflt_offset, val);
3319 }
3320 
3321 
3322 // Support for intrinsification of java.nio.Buffer.checkIndex
3323 int java_nio_Buffer::limit_offset() {
3324   return _limit_offset;
3325 }
3326 
3327 
3328 void java_nio_Buffer::compute_offsets() {
3329   Klass* k = SystemDictionary::nio_Buffer_klass();
3330   assert(k != NULL, "must be loaded in 1.4+");
3331   compute_offset(_limit_offset, k, vmSymbols::limit_name(), vmSymbols::int_signature());
3332 }
3333 
3334 void java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(TRAPS) {
3335   if (_owner_offset != 0) return;
3336 
3337   SystemDictionary::load_abstract_ownable_synchronizer_klass(CHECK);
3338   Klass* k = SystemDictionary::abstract_ownable_synchronizer_klass();
3339   compute_offset(_owner_offset, k,
3340                  vmSymbols::exclusive_owner_thread_name(), vmSymbols::thread_signature());
3341 }
3342 
3343 oop java_util_concurrent_locks_AbstractOwnableSynchronizer::get_owner_threadObj(oop obj) {
3344   assert(_owner_offset != 0, "Must be initialized");
3345   return obj->obj_field(_owner_offset);
3346 }
3347 
3348 // Compute hard-coded offsets
3349 // Invoked before SystemDictionary::initialize, so pre-loaded classes
3350 // are not available to determine the offset_of_static_fields.
3351 void JavaClasses::compute_hard_coded_offsets() {
3352   const int x = heapOopSize;
3353   const int header = instanceOopDesc::base_offset_in_bytes();
3354 
3355   // Throwable Class
3356   java_lang_Throwable::backtrace_offset  = java_lang_Throwable::hc_backtrace_offset  * x + header;
3357   java_lang_Throwable::detailMessage_offset = java_lang_Throwable::hc_detailMessage_offset * x + header;
3358   java_lang_Throwable::cause_offset      = java_lang_Throwable::hc_cause_offset      * x + header;
3359   java_lang_Throwable::stackTrace_offset = java_lang_Throwable::hc_stackTrace_offset * x + header;
3360   java_lang_Throwable::static_unassigned_stacktrace_offset = java_lang_Throwable::hc_static_unassigned_stacktrace_offset *  x;
3361 
3362   // java_lang_boxing_object
3363   java_lang_boxing_object::value_offset = java_lang_boxing_object::hc_value_offset + header;
3364   java_lang_boxing_object::long_value_offset = align_size_up((java_lang_boxing_object::hc_value_offset + header), BytesPerLong);
3365 
3366   // java_lang_ref_Reference:
3367   java_lang_ref_Reference::referent_offset = java_lang_ref_Reference::hc_referent_offset * x + header;
3368   java_lang_ref_Reference::queue_offset = java_lang_ref_Reference::hc_queue_offset * x + header;
3369   java_lang_ref_Reference::next_offset  = java_lang_ref_Reference::hc_next_offset * x + header;
3370   java_lang_ref_Reference::discovered_offset  = java_lang_ref_Reference::hc_discovered_offset * x + header;
3371   java_lang_ref_Reference::static_lock_offset = java_lang_ref_Reference::hc_static_lock_offset *  x;
3372   java_lang_ref_Reference::static_pending_offset = java_lang_ref_Reference::hc_static_pending_offset * x;
3373   // Artificial fields for java_lang_ref_Reference
3374   // The first field is for the discovered field added in 1.4
3375   java_lang_ref_Reference::number_of_fake_oop_fields = 1;
3376 
3377   // java_lang_ref_SoftReference Class
3378   java_lang_ref_SoftReference::timestamp_offset = align_size_up((java_lang_ref_SoftReference::hc_timestamp_offset * x + header), BytesPerLong);
3379   // Don't multiply static fields because they are always in wordSize units
3380   java_lang_ref_SoftReference::static_clock_offset = java_lang_ref_SoftReference::hc_static_clock_offset * x;
3381 
3382   // java_lang_ClassLoader
3383   java_lang_ClassLoader::parent_offset = java_lang_ClassLoader::hc_parent_offset * x + header;
3384 
3385   // java_lang_System
3386   java_lang_System::static_in_offset  = java_lang_System::hc_static_in_offset  * x;
3387   java_lang_System::static_out_offset = java_lang_System::hc_static_out_offset * x;
3388   java_lang_System::static_err_offset = java_lang_System::hc_static_err_offset * x;
3389   java_lang_System::static_security_offset = java_lang_System::hc_static_security_offset * x;
3390 
3391   // java_lang_StackTraceElement
3392   java_lang_StackTraceElement::declaringClass_offset = java_lang_StackTraceElement::hc_declaringClass_offset  * x + header;
3393   java_lang_StackTraceElement::methodName_offset = java_lang_StackTraceElement::hc_methodName_offset * x + header;
3394   java_lang_StackTraceElement::fileName_offset   = java_lang_StackTraceElement::hc_fileName_offset   * x + header;
3395   java_lang_StackTraceElement::lineNumber_offset = java_lang_StackTraceElement::hc_lineNumber_offset * x + header;
3396   java_lang_AssertionStatusDirectives::classes_offset = java_lang_AssertionStatusDirectives::hc_classes_offset * x + header;
3397   java_lang_AssertionStatusDirectives::classEnabled_offset = java_lang_AssertionStatusDirectives::hc_classEnabled_offset * x + header;
3398   java_lang_AssertionStatusDirectives::packages_offset = java_lang_AssertionStatusDirectives::hc_packages_offset * x + header;
3399   java_lang_AssertionStatusDirectives::packageEnabled_offset = java_lang_AssertionStatusDirectives::hc_packageEnabled_offset * x + header;
3400   java_lang_AssertionStatusDirectives::deflt_offset = java_lang_AssertionStatusDirectives::hc_deflt_offset * x + header;
3401 
3402 }
3403 
3404 
3405 // Compute non-hard-coded field offsets of all the classes in this file
3406 void JavaClasses::compute_offsets() {
3407   // java_lang_Class::compute_offsets was called earlier in bootstrap
3408   java_lang_ClassLoader::compute_offsets();
3409   java_lang_Thread::compute_offsets();
3410   java_lang_ThreadGroup::compute_offsets();
3411   java_lang_invoke_MethodHandle::compute_offsets();
3412   java_lang_invoke_DirectMethodHandle::compute_offsets();
3413   java_lang_invoke_MemberName::compute_offsets();
3414   java_lang_invoke_LambdaForm::compute_offsets();
3415   java_lang_invoke_MethodType::compute_offsets();
3416   java_lang_invoke_CallSite::compute_offsets();
3417   java_lang_invoke_MethodHandleNatives_CallSiteContext::compute_offsets();
3418   java_security_AccessControlContext::compute_offsets();
3419   // Initialize reflection classes. The layouts of these classes
3420   // changed with the new reflection implementation in JDK 1.4, and
3421   // since the Universe doesn't know what JDK version it is until this
3422   // point we defer computation of these offsets until now.
3423   java_lang_reflect_AccessibleObject::compute_offsets();
3424   java_lang_reflect_Method::compute_offsets();
3425   java_lang_reflect_Constructor::compute_offsets();
3426   java_lang_reflect_Field::compute_offsets();
3427   java_nio_Buffer::compute_offsets();
3428   sun_reflect_ConstantPool::compute_offsets();
3429   sun_reflect_UnsafeStaticFieldAccessorImpl::compute_offsets();
3430   java_lang_reflect_Parameter::compute_offsets();
3431 
3432   // generated interpreter code wants to know about the offsets we just computed:
3433   AbstractAssembler::update_delayed_values();
3434 }
3435 
3436 #ifndef PRODUCT
3437 
3438 // These functions exist to assert the validity of hard-coded field offsets to guard
3439 // against changes in the class files
3440 
3441 bool JavaClasses::check_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3442   EXCEPTION_MARK;
3443   fieldDescriptor fd;
3444   TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3445   Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3446   instanceKlassHandle h_klass (THREAD, k);
3447   TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3448   TempNewSymbol f_sig  = SymbolTable::new_symbol(field_sig, CATCH);
3449   if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3450     tty->print_cr("Nonstatic field %s.%s not found", klass_name, field_name);
3451     return false;
3452   }
3453   if (fd.is_static()) {
3454     tty->print_cr("Nonstatic field %s.%s appears to be static", klass_name, field_name);
3455     return false;
3456   }
3457   if (fd.offset() == hardcoded_offset ) {
3458     return true;
3459   } else {
3460     tty->print_cr("Offset of nonstatic field %s.%s is hardcoded as %d but should really be %d.",
3461                   klass_name, field_name, hardcoded_offset, fd.offset());
3462     return false;
3463   }
3464 }
3465 
3466 
3467 bool JavaClasses::check_static_offset(const char *klass_name, int hardcoded_offset, const char *field_name, const char* field_sig) {
3468   EXCEPTION_MARK;
3469   fieldDescriptor fd;
3470   TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3471   Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3472   instanceKlassHandle h_klass (THREAD, k);
3473   TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3474   TempNewSymbol f_sig  = SymbolTable::new_symbol(field_sig, CATCH);
3475   if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3476     tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3477     return false;
3478   }
3479   if (!fd.is_static()) {
3480     tty->print_cr("Static field %s.%s appears to be nonstatic", klass_name, field_name);
3481     return false;
3482   }
3483   if (fd.offset() == hardcoded_offset + InstanceMirrorKlass::offset_of_static_fields()) {
3484     return true;
3485   } else {
3486     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());
3487     return false;
3488   }
3489 }
3490 
3491 
3492 bool JavaClasses::check_constant(const char *klass_name, int hardcoded_constant, const char *field_name, const char* field_sig) {
3493   EXCEPTION_MARK;
3494   fieldDescriptor fd;
3495   TempNewSymbol klass_sym = SymbolTable::new_symbol(klass_name, CATCH);
3496   Klass* k = SystemDictionary::resolve_or_fail(klass_sym, true, CATCH);
3497   instanceKlassHandle h_klass (THREAD, k);
3498   TempNewSymbol f_name = SymbolTable::new_symbol(field_name, CATCH);
3499   TempNewSymbol f_sig  = SymbolTable::new_symbol(field_sig, CATCH);
3500   if (!h_klass->find_local_field(f_name, f_sig, &fd)) {
3501     tty->print_cr("Static field %s.%s not found", klass_name, field_name);
3502     return false;
3503   }
3504   if (!fd.is_static() || !fd.has_initial_value()) {
3505     tty->print_cr("Static field %s.%s appears to be non-constant", klass_name, field_name);
3506     return false;
3507   }
3508   if (!fd.initial_value_tag().is_int()) {
3509     tty->print_cr("Static field %s.%s is not an int", klass_name, field_name);
3510     return false;
3511   }
3512   jint field_value = fd.int_initial_value();
3513   if (field_value == hardcoded_constant) {
3514     return true;
3515   } else {
3516     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);
3517     return false;
3518   }
3519 }
3520 
3521 
3522 // Check the hard-coded field offsets of all the classes in this file
3523 
3524 void JavaClasses::check_offsets() {
3525   bool valid = true;
3526   HandleMark hm;
3527 
3528 #define CHECK_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3529   valid &= check_offset(klass_name, cpp_klass_name :: field_name ## _offset, #field_name, field_sig)
3530 
3531 #define CHECK_LONG_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3532   valid &= check_offset(klass_name, cpp_klass_name :: long_ ## field_name ## _offset, #field_name, field_sig)
3533 
3534 #define CHECK_STATIC_OFFSET(klass_name, cpp_klass_name, field_name, field_sig) \
3535   valid &= check_static_offset(klass_name, cpp_klass_name :: static_ ## field_name ## _offset, #field_name, field_sig)
3536 
3537 #define CHECK_CONSTANT(klass_name, cpp_klass_name, field_name, field_sig) \
3538   valid &= check_constant(klass_name, cpp_klass_name :: field_name, #field_name, field_sig)
3539 
3540   // java.lang.String
3541 
3542   CHECK_OFFSET("java/lang/String", java_lang_String, value, "[C");
3543   if (java_lang_String::has_offset_field()) {
3544     CHECK_OFFSET("java/lang/String", java_lang_String, offset, "I");
3545     CHECK_OFFSET("java/lang/String", java_lang_String, count, "I");
3546   }
3547   if (java_lang_String::has_hash_field()) {
3548     CHECK_OFFSET("java/lang/String", java_lang_String, hash, "I");
3549   }
3550 
3551   // java.lang.Class
3552 
3553   // Fake fields
3554   // CHECK_OFFSET("java/lang/Class", java_lang_Class, klass); // %%% this needs to be checked
3555   // CHECK_OFFSET("java/lang/Class", java_lang_Class, array_klass); // %%% this needs to be checked
3556 
3557   // java.lang.Throwable
3558 
3559   CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, backtrace, "Ljava/lang/Object;");
3560   CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, detailMessage, "Ljava/lang/String;");
3561   CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, cause, "Ljava/lang/Throwable;");
3562   CHECK_OFFSET("java/lang/Throwable", java_lang_Throwable, stackTrace, "[Ljava/lang/StackTraceElement;");
3563 
3564   // Boxed primitive objects (java_lang_boxing_object)
3565 
3566   CHECK_OFFSET("java/lang/Boolean",   java_lang_boxing_object, value, "Z");
3567   CHECK_OFFSET("java/lang/Character", java_lang_boxing_object, value, "C");
3568   CHECK_OFFSET("java/lang/Float",     java_lang_boxing_object, value, "F");
3569   CHECK_LONG_OFFSET("java/lang/Double", java_lang_boxing_object, value, "D");
3570   CHECK_OFFSET("java/lang/Byte",      java_lang_boxing_object, value, "B");
3571   CHECK_OFFSET("java/lang/Short",     java_lang_boxing_object, value, "S");
3572   CHECK_OFFSET("java/lang/Integer",   java_lang_boxing_object, value, "I");
3573   CHECK_LONG_OFFSET("java/lang/Long", java_lang_boxing_object, value, "J");
3574 
3575   // java.lang.ClassLoader
3576 
3577   CHECK_OFFSET("java/lang/ClassLoader", java_lang_ClassLoader, parent,      "Ljava/lang/ClassLoader;");
3578 
3579   // java.lang.System
3580 
3581   CHECK_STATIC_OFFSET("java/lang/System", java_lang_System,  in, "Ljava/io/InputStream;");
3582   CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, out, "Ljava/io/PrintStream;");
3583   CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, err, "Ljava/io/PrintStream;");
3584   CHECK_STATIC_OFFSET("java/lang/System", java_lang_System, security, "Ljava/lang/SecurityManager;");
3585 
3586   // java.lang.StackTraceElement
3587 
3588   CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, declaringClass, "Ljava/lang/String;");
3589   CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, methodName, "Ljava/lang/String;");
3590   CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement,   fileName, "Ljava/lang/String;");
3591   CHECK_OFFSET("java/lang/StackTraceElement", java_lang_StackTraceElement, lineNumber, "I");
3592 
3593   // java.lang.ref.Reference
3594 
3595   CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, referent, "Ljava/lang/Object;");
3596   CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, queue, "Ljava/lang/ref/ReferenceQueue;");
3597   CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, next, "Ljava/lang/ref/Reference;");
3598   // Fake field
3599   //CHECK_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, discovered, "Ljava/lang/ref/Reference;");
3600   CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, lock, "Ljava/lang/ref/Reference$Lock;");
3601   CHECK_STATIC_OFFSET("java/lang/ref/Reference", java_lang_ref_Reference, pending, "Ljava/lang/ref/Reference;");
3602 
3603   // java.lang.ref.SoftReference
3604 
3605   CHECK_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, timestamp, "J");
3606   CHECK_STATIC_OFFSET("java/lang/ref/SoftReference", java_lang_ref_SoftReference, clock, "J");
3607 
3608   // java.lang.AssertionStatusDirectives
3609   //
3610   // The CheckAssertionStatusDirectives boolean can be removed from here and
3611   // globals.hpp after the AssertionStatusDirectives class has been integrated
3612   // into merlin "for some time."  Without it, the vm will fail with early
3613   // merlin builds.
3614 
3615   if (CheckAssertionStatusDirectives) {
3616     const char* nm = "java/lang/AssertionStatusDirectives";
3617     const char* sig = "[Ljava/lang/String;";
3618     CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classes, sig);
3619     CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, classEnabled, "[Z");
3620     CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packages, sig);
3621     CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, packageEnabled, "[Z");
3622     CHECK_OFFSET(nm, java_lang_AssertionStatusDirectives, deflt, "Z");
3623   }
3624 
3625   if (!valid) vm_exit_during_initialization("Hard-coded field offset verification failed");
3626 }
3627 
3628 #endif // PRODUCT
3629 
3630 int InjectedField::compute_offset() {
3631   Klass* klass_oop = klass();
3632   for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
3633     if (!may_be_java && !fs.access_flags().is_internal()) {
3634       // Only look at injected fields
3635       continue;
3636     }
3637     if (fs.name() == name() && fs.signature() == signature()) {
3638       return fs.offset();
3639     }
3640   }
3641   ResourceMark rm;
3642   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)" : "");
3643 #ifndef PRODUCT
3644   klass_oop->print();
3645   tty->print_cr("all fields:");
3646   for (AllFieldStream fs(InstanceKlass::cast(klass_oop)); !fs.done(); fs.next()) {
3647     tty->print_cr("  name: %s, sig: %s, flags: %08x", fs.name()->as_C_string(), fs.signature()->as_C_string(), fs.access_flags().as_int());
3648   }
3649 #endif //PRODUCT
3650   vm_exit_during_initialization("Invalid layout of preloaded class: use -XX:+TraceClassLoading to see the origin of the problem class");
3651   return -1;
3652 }
3653 
3654 void javaClasses_init() {
3655   JavaClasses::compute_offsets();
3656   JavaClasses::check_offsets();
3657   FilteredFieldsMap::initialize();  // must be done after computing offsets.
3658 }